Sealing structure of valve body and valveTechnical Field
The invention belongs to the technical field of valves, and particularly relates to a sealing structure of a valve body and a valve.
Background
The fuel tank in the current market generally has the two requirements of 1, the limit of filling (excessive filling prohibition) and 2, the fuel tank can be normally exhausted under specific conditions, namely, the fuel tank can be timely depressurized when positive pressure exists in the fuel tank or can be timely filled with air when negative pressure exists in the fuel tank. In order to meet the above requirements of a fuel tank, a fuel tank is typically provided with a refuel limiting valve and at least one roll-over valve. New designs are developed on the slow market, and one fuel tank valve can meet the two functional requirements at the same time, and the functions of the two valves are integrated on one product, so that the number of valves required to be arranged on the fuel tank can be reduced, and the fuel tank is easier to be arranged on the fuel tank, which is generally called a combined valve, namely, a refueling limiting valve and a turnover valve are combined together, so that one product has the functions of the two valves at the same time.
With the promulgation of the 'national six' regulation, the evaporation and emission requirements of the whole fuel system are also more and more severe, and the requirements on dynamic leakage (generally comprising horizontal shaking test, angle overturning shaking test, six-axis shaking test and the like) of the fuel tank are also improved, so that a certain test is carried out on the design of a valve, whether a fuel filling limit valve or an overturning valve or a combined valve is arranged and fixed on the fuel tank, the valve core is communicated with the inside of the fuel tank, and the pipe orifice of the valve is generally connected to a carbon tank through a pipeline. When the vehicle fluctuates in the running process, fuel in the fuel tank can billow, and if the valve core in the valve can not timely seal the exhaust channel at this time, the fuel can be overturned out of the valve exhaust channel with a certain probability and flows out through the pipe orifice to form a leakage phenomenon.
The combined valve is large in whole, a valve core of the oil filling limiting valve is arranged on one side, a valve core of the turning valve is arranged on one side, the valve cores are not interfered with each other, but two sealing components matched with the valve cores are needed to be arranged respectively due to the fact that the two valve cores are separated, the combined valve is similar to a common oil filling limiting valve in size, the valve core of the oil filling limiting valve and the valve core of the turning valve are stacked together, a small floater is stacked on a large floater, the small floater corresponds to the function of the oil filling limiting valve, the large floater corresponds to the function of the turning valve, and two different sealing components are needed to be arranged for sealing in the mode of two stacking.
Disclosure of Invention
The invention aims to solve the technical problem of providing a sealing structure of a valve body and a valve, so as to solve the problem that sealing parts of the existing combined valve are required to be arranged separately for two valve cores.
In order to solve the problems, the technical scheme of the invention is as follows:
The invention relates to a sealing structure of a valve body, which is arranged in the valve body, wherein a small exhaust port and a large exhaust port which is wound around the small exhaust port are arranged on the top surface of an inner cavity of the valve body, the small exhaust port corresponds to a first exhaust channel, the large exhaust port corresponds to a second exhaust channel, a small valve core corresponds to the small exhaust port, and a large valve core corresponds to the large exhaust port, and the sealing structure comprises:
The sealing part is arranged in the inner cavity of the valve body and between the large valve core and the top surface of the inner cavity of the valve body, and is used for sealing the large discharge port in cooperation with the large valve core and closing the second exhaust channel to form a first communication channel which is communicated with the inner cavity of the valve body and the small discharge port, and the bottom end of the first communication channel corresponds to the small valve core;
When the small exhaust port is required to be closed, the small valve core slides to the closing position and is matched with the bottom end of the first communication channel to seal the small exhaust port, and the first exhaust channel is closed.
The sealing structure of the valve body comprises a bearing piece and a sealing assembly;
the bearing piece is movably arranged in the inner cavity of the valve body or fixedly connected with the large valve core, and is provided with a through hole matched with the small discharge port;
The sealing component is arranged on the bearing piece and/or the top surface of the inner cavity of the valve body, and is used for sealing the large discharge port in cooperation with the bearing piece and forming the first communication channel in cooperation with the small discharge port and the through hole.
The sealing assembly comprises a large sealing ring, a middle sealing ring and a small sealing ring;
The large sealing ring and the middle sealing ring are arranged on the upper surface of the bearing piece and correspond to the large exhaust port, and the large sealing ring is sleeved on the large exhaust port;
the small sealing ring is arranged at the through hole and is used for being matched with the first communication channel.
The sealing assembly comprises a large sealing ring, a middle extending ring and a small sealing ring;
The large sealing ring is arranged on the upper surface of the bearing piece, corresponds to the large discharge port and is sleeved on the large discharge port, and the middle extension ring is arranged on the top surface of the inner cavity of the valve body, corresponds to the large discharge port and is positioned between the large discharge port and the small discharge port;
the small sealing ring is arranged at the through hole and is used for being matched with the first communication channel.
The sealing assembly comprises a large extension ring, a middle sealing ring and a small sealing ring;
The large extension ring is arranged on the top surface of the inner cavity of the valve body, corresponds to the large discharge port and is sleeved on the large discharge port, and the middle sealing ring is arranged on the upper surface of the bearing piece, corresponds to the large discharge port and is positioned between the large discharge port and the small discharge port;
the small sealing ring is arranged at the through hole and is used for being matched with the first communication channel.
The sealing assembly comprises a large extending ring, a middle extending ring and a small sealing ring;
the large extension ring is arranged on the top surface of the inner cavity of the valve body, corresponds to the large discharge port and is sleeved on the large discharge port, and the middle extension ring is arranged on the top surface of the inner cavity of the valve body, corresponds to the large discharge port and is positioned between the large discharge port and the small discharge port;
the small sealing ring is arranged at the through hole and is used for being matched with the first communication channel.
The sealing assembly comprises a large extension ring and a small extension ring;
The large extension ring is arranged on the top surface of the inner cavity of the valve body, corresponds to the large discharge port and is sleeved on the large discharge port;
The small extension ring is arranged on the top surface of the inner cavity of the valve body and corresponds to the large discharge port, the upper end of the small extension ring is positioned between the large discharge port and the small discharge port, and the diameter of the lower end of the small extension ring is smaller than the diameter of the through hole;
the large extending ring, the outer side wall of the small extending ring and the bearing piece are matched to seal the large exhaust port, and the small extending ring is matched with the small exhaust port to form the first communication channel.
The sealing structure of the valve body comprises a sealing assembly, wherein the sealing assembly comprises a large extension ring, a middle extension ring and a small extension ring;
the large extension ring is arranged on the top surface of the inner cavity of the valve body, corresponds to the large discharge port and is sleeved on the large discharge port, and the middle extension ring is arranged on the top surface of the inner cavity of the valve body, corresponds to the large discharge port and is positioned between the large discharge port and the small discharge port;
The small extension ring is arranged on the top surface of the inner cavity of the valve body and is used for being matched with the small discharge port to form the first communication channel.
According to the sealing structure of the valve body, when the sealing component is arranged on the bearing piece, the sealing component and the bearing piece are integrally formed, and when the sealing component is arranged on the top surface of the inner cavity of the valve body, the sealing component and the valve body are integrally formed.
The bearing piece comprises a bearing unit and a sliding unit, wherein the sliding unit is connected to the inner cavity of the valve body in a sliding mode, and the bearing unit is arranged on the sliding unit.
The sealing structure of the valve body comprises a large exhaust hole, a sealing part, a sealing component and a sealing component, wherein the large exhaust hole is a plurality of large exhaust holes wound on a small exhaust hole;
the second sealing member is arranged at the small exhaust port and is used for forming the first communication channel.
The sealing structure of the valve body comprises a sealing assembly, wherein the sealing assembly comprises a large sealing ring, a medium sealing ring and a small sealing ring;
The large sealing ring and the middle sealing ring are both arranged on the top surface of the inner cavity of the valve body and correspond to the large discharge port;
the small sealing ring is arranged on the top surface of the inner cavity of the valve body and used for forming the first communication channel.
The sealing structure of the valve body comprises a bearing piece and a sealing component, wherein the bearing piece is arranged on the top surface of the large valve core, and a through hole matched with the small discharge port is formed in the bearing piece;
the sealing assembly comprises a large sealing ring, a middle sealing ring and a small sealing ring, wherein the large sealing ring and the middle sealing ring are arranged on the upper surface of the bearing piece and correspond to the large exhaust port, the large sealing ring is sleeved on the large exhaust port, the middle sealing ring is positioned between the large exhaust port and the small exhaust port, and the small sealing ring is arranged at the through hole and used for being matched with the first communication channel.
The valve comprises the sealing structure of the valve body.
By adopting the technical scheme, the invention has the following advantages and positive effects compared with the prior art:
The valve body is internally provided with a large exhaust port and a small exhaust port, and is provided with a first exhaust channel corresponding to the small exhaust port and a second exhaust channel corresponding to the large exhaust port. When the small exhaust port needs to be further closed, the small valve core is lifted to seal the first communication channel, and the first exhaust channel is closed to realize the closing of the small exhaust port. The two valve cores can be opened and closed respectively only by one sealing part, so that the problem that sealing parts of the existing combination valve are required to be arranged separately for the two valve cores is solved.
Drawings
FIG. 1 is a schematic view of one embodiment of a seal structure of the present invention;
FIG. 2 is a schematic view of another embodiment of a seal structure of the present invention;
FIG. 3 is a schematic view of another embodiment of a seal structure of the present invention;
FIG. 4 is a schematic view of a second exhaust passage of the seal structure of the present invention;
FIG. 5 is a schematic view of a first exhaust passage of the seal structure of the present invention;
FIG. 6 is a schematic view of a sealing portion of the sealing structure of the present invention disposed on a large valve core;
Fig. 7 is a schematic view of the seal structure of the present invention fully closed.
The reference numerals indicate 1, valve body; 2, a large discharge port, 3, a small discharge port, 4, a bearing piece, 401, a sealing unit, 402, a sliding unit, 5, a large valve core, 6, a small valve core, 7, a large sealing ring, 8, a middle sealing ring, 9, a small sealing ring, 10, a middle extending ring and 11, a small extending ring.
Detailed Description
The following provides a further detailed description of a seal and valve according to the present invention, taken in conjunction with the accompanying drawings and detailed description. Advantages and features of the invention will become more apparent from the following description and from the claims.
The combination valve in this embodiment is a combination valve capable of simultaneously realizing a fuel filling limit valve function and a roll-over valve function, and is applied and installed in a fuel tank.
The sealing structure of the embodiment is arranged in a valve body 1 of a combined valve with double valve cores, and is used for sealing a small discharge port 3 on the top surface of an inner cavity of the valve body 1 and a large discharge port 2 annularly arranged on the small discharge port 3, a first exhaust channel corresponding to the small discharge port 3 and a second exhaust channel corresponding to the large discharge port 2 are arranged in the valve body, and the double valve cores are respectively a small valve core 6 corresponding to the small discharge port 3 and a large valve core 5 corresponding to the large discharge port 2.
Referring to fig. 1 to 5, the sealing structure specifically includes a sealing portion.
The sealing part is arranged in the inner cavity of the valve body 1 and is positioned between the large valve core 5 and the top surface of the inner cavity of the valve body 1, and is used for being matched with the large valve core 5 to seal the large discharge port 2 and form a first communication channel which is communicated with the inner cavity of the valve body 1 and the small discharge port 3, and the bottom end of the first communication channel corresponds to the small valve core 6.
In actual operation, the combination valve needs to realize two situations for different scenes. The first case is to close the large discharge port 2 but the small discharge port 3 is open, and the second case is to close both the large discharge port 2 and the small discharge port 3.
In the first case, the large valve core 5 moves up to the top end of the inner cavity of the valve body 1, and seals the large discharge port 2 in cooperation with the sealing portion, closing the second exhaust passage and forming the first communication passage. In the second case, the small valve core 6 moves up to the top end of the inner cavity of the valve body 1, and the top surface of the small valve core 6 is matched with the bottom end of the first communication channel to realize the sealing of the bottom end opening of the first communication channel, and the second exhaust channel is closed, so that the small exhaust port 3 is closed.
Referring to fig. 4, 5 and 7, in this embodiment, a sealing portion between a large valve core 5 and the top surface of the inner cavity of the valve body 1 is disposed in the inner cavity of the valve body, when the large discharge port 2 needs to be closed, the large valve core 5 moves to a closed position and cooperates with the sealing portion to close the large discharge port 2 and form a first communication channel for communicating with the small discharge port 3, and when the small discharge port 3 needs to be further closed, the small discharge port 3 can be closed by lifting the small valve core 6 to seal the first communication channel. The two valve cores can be opened and closed respectively only by one sealing part, so that the problem that sealing parts of the existing combination valve are required to be arranged separately for the two valve cores is solved.
The specific structure of this embodiment is further described below:
In this embodiment, one implementation, the seal may comprise a carrier 4 and a seal assembly. The bearing piece 4 is movably arranged in the inner cavity of the valve body 1 or fixedly connected with the large valve core 5, and the bearing piece 4 is provided with a through hole matched with the small discharge port 3. The sealing component is arranged on the bearing piece 4 and/or the top surface of the inner cavity of the valve body 1, and is used for sealing the large discharge port 2 by matching with the bearing piece 4 and forming a first communication channel by matching with the small discharge port 3 and the through hole.
Further, when the seal assembly is disposed on the carrier 4, the seal assembly and the carrier 4 are integrally formed. When the sealing component is arranged on the top surface of the inner cavity of the valve body 1, the sealing component and the valve body 1 are integrally formed.
Further, when the sealing component is partially disposed on the carrier 4 and partially disposed on the valve body 1, the sealing component can be integrally formed with the carrier 4 and the valve body 1, respectively.
In particular, the carrier 4 may particularly comprise a sealing unit 401 and a sliding unit 402. The sliding unit 402 can be slidably connected to the inner cavity of the valve body 1 through a sliding rail and a sliding chute. The sealing unit 401 is mounted on the sliding unit 402 for opening and closing the two discharge ports in cooperation with the sealing assembly.
In this embodiment, the sealing portion may also be a sealing assembly, where the sealing assembly specifically includes a plurality of first sealing elements and second sealing elements, the first sealing elements are respectively disposed on the corresponding large exhaust holes 2 and used to form a second communication channel that communicates the inner cavity of the valve body 1 with the large exhaust holes 2, and the second sealing elements are disposed on the corresponding small exhaust holes 3 and used to form a first communication channel.
When the large discharge port is required to be closed, the large valve core 2 moves upwards to the top end of the inner cavity of the valve body 1, and the top surface of the large valve core 5 is matched with the bottom end of the second communication channel to realize the sealing of the bottom end opening of the second communication channel, so that the large discharge port 2 is closed. When the small discharge port is required to be closed, the small valve core 6 moves upwards to the top end of the inner cavity of the valve body 1, and the top surface of the small valve core 6 is matched with the bottom end of the first communication channel to realize the sealing of the bottom end opening of the first communication channel, so that the small discharge port 3 is closed.
In this embodiment, the seal may also be another seal assembly comprising a large seal ring 7, a medium seal ring 8 and a small seal ring 9. The large sealing ring 7, the middle sealing ring 8 and the small sealing ring 9 are all arranged on the top surface of the inner cavity of the valve body 1 and correspond to the large discharge port 2. The large sealing ring 7 is sleeved on the large discharge port 2, the middle sealing ring 8 is positioned between the large discharge port 2 and the small discharge port 3, and the small sealing ring 9 is also arranged between the large discharge port 2 and the small discharge port 3 and is used for forming a first communication channel.
When the large discharge port 2 needs to be closed, the large valve core 2 moves upwards to the top end of the inner cavity of the valve body 1, and the top surface of the large valve core 5 is matched with the bottom ends of the large sealing ring 7 and the middle sealing ring 8 to realize the closing of the large discharge port 2. When the small discharge port 3 needs to be closed, the small valve core 6 moves upwards to the top end of the inner cavity of the valve body 1, and the top surface of the small valve core 6 is matched with the bottom end of the first communication channel to realize the sealing of the bottom end opening of the first communication channel, so that the small discharge port 3 is closed.
Referring to fig. 7, in this embodiment, the seal may also be a carrier and seal assembly disposed directly on the large spool. The bearing piece is arranged on the top surface of the large valve core, and is provided with a through hole matched with the small exhaust port. The seal assembly may include a large seal ring 7, a medium seal ring 8, and a small seal ring 9. The large sealing ring 7 and the middle sealing ring 8 are arranged on the upper surface of the bearing piece and correspond to the large exhaust port 2, the large sealing ring 7 is sleeved on the large exhaust port 2, the middle sealing ring 8 is arranged between the large exhaust port 2 and the small exhaust port 3, and the small sealing ring 9 is arranged at the through hole and used for being matched with the large exhaust port 2 to form a first communication channel.
When the large discharge port 2 needs to be closed, the large valve core 2 moves upwards to the top end of the inner cavity of the valve body 1, and the upper ends of the large sealing ring 7 and the middle sealing ring 8 are matched with the top surface of the inner cavity of the valve body to realize the closing of the large discharge port 2. When the small discharge port 3 needs to be closed, the small valve core 6 moves upwards to the top end of the inner cavity of the valve body 1, and the top surface of the small valve core 6 is matched with the bottom end of the first communication channel to realize the sealing of the bottom end opening of the first communication channel, so that the small discharge port 3 is closed.
Of course, in other embodiments, the seal assembly may be directly mounted to the large spool without the use of a carrier, and is not specifically limited herein
Example two
This example is a specific description of several implementations of the seal assembly in the first example above:
Embodiment one referring to fig. 1, the seal assembly specifically comprises a large seal ring 7, a medium seal ring 8 and a small seal ring 9.
The upper end face of the bearing piece 4 is provided with a large sealing ring 7 and a middle sealing ring 8.
Wherein the diameter of the large sealing ring 7 needs to be larger than the maximum diameter of the large discharge opening 2, and the diameter of the medium sealing ring 8 needs to be smaller than the minimum diameter of the large discharge opening 2 and the maximum diameter of the small discharge opening 3. The arrangement is to ensure that when the bearing piece 4 is in the closed position, the bearing piece can be abutted against the wall surfaces of the top surface of the inner cavity of the valve body 1, which are positioned on the inner side and the outer side of the large discharge opening 2, so that the large discharge opening 2 is sealed.
When the large discharge port 2 is sealed, the small discharge port 3 communicates with the inner cavity of the valve body 1 through the through hole of the carrier 4. In order to seal the small outlet opening 3, a small sealing ring 9 is provided on the lower end face of the sealing ring, and the diameter of the small sealing ring 9 is larger than the diameter of the through hole. The small sealing ring 9 can be contacted with the top surface of the small valve core 6 and realize sealing of the small exhaust port 3 when the small valve core 6 ascends.
Second embodiment referring to fig. 2, this embodiment is a modification of the first embodiment described above. The arrangement mode of the large sealing ring 7 and the small sealing ring 9 is unchanged, and the middle sealing ring 8 is removed. Specifically, a middle extension ring 10 is arranged on the wall surface of the top surface of the inner cavity of the valve body 1 between the large discharge port 2 and the small discharge port 3, and the lower end of the middle extension ring 10 is used for contacting with the upper end surface of the bearing piece 4. When the bearing piece 4 moves to the closing position, the large sealing ring 7 is matched to seal the large discharge port 2, and meanwhile, the small discharge port 3 can be matched with the through hole of the bearing piece 4 to be communicated with the inner cavity of the valve body 1. The sealing manner of the small sealing ring 9 is the same as that of the first embodiment, and will not be described again.
Embodiment III this embodiment is also a modification of the first embodiment described above. The arrangement mode of the middle sealing ring 8 and the small sealing ring 9 is unchanged, and the large sealing ring 7 is removed. Specifically, a large extension ring is arranged on the wall surface of the top surface of the inner cavity of the valve body 1, which is positioned outside the large discharge port 2, and the lower end of the large extension ring is used for contacting with the upper end surface of the bearing piece 4. So that the co-operating middle sealing ring 8 effects a seal against the large outlet opening 2 when the carrier 4 is moved to the closed position. The sealing manner of the middle sealing ring 8 and the small sealing ring 9 on the small exhaust port 3 is the same as that of the first embodiment, and will not be repeated.
Embodiment IV this embodiment is also a modification of the first embodiment described above. The arrangement of the small sealing ring 9 is unchanged, and the large sealing ring 7 and the middle sealing ring 8 are removed. Specifically, a large extension ring is arranged on the wall surface of the top surface of the inner cavity of the valve body 1, which is positioned outside the large discharge port 2, and the lower end of the large extension ring is used for contacting with the upper end surface of the bearing piece 4. On the wall surface of the inner cavity top surface of the valve body 1 between the large discharge port 2 and the small discharge port 3, a middle extension ring 10 is provided, and the lower end of the middle extension ring 10 is also used for contacting with the upper end surface of the bearing piece 4. So that the large and medium extension rings 10 cooperate with the carrier 4 to seal the large discharge opening 2 when the carrier 4 is moved to the closed position. The sealing manner of the small sealing ring 9 to the small discharge port 3 is the same as that of the first embodiment, and will not be described again.
Fifth embodiment referring to fig. 3, this embodiment is a modification of the first embodiment described above. The large seal ring 7, the medium seal ring 8 and the small seal ring 9 are all removed. Specifically, a large extension ring is arranged on the wall surface of the top surface of the inner cavity of the valve body 1, which is positioned outside the large discharge port 2, and the lower end of the large extension ring is used for contacting with the upper end surface of the bearing piece 4. On the wall surface of the top surface of the inner cavity of the valve body 1 between the large discharge port 2 and the small discharge port 3, a small extension ring 11 is arranged, the diameter of the upper end of the small extension ring 11 is larger than the diameter of the inner ring of the bearing piece 4, and the diameter of the lower end of the small extension ring 11 is smaller than the diameter of the inner ring of the bearing piece 4, namely the outer side wall of the small extension ring 11 is used for being contacted with the wall of the through hole of the bearing piece 4. So that the cooperation of the carrier 4 with the outer side wall of the small extension ring 11 and the large extension ring achieve a seal against the large discharge opening 2 when the carrier 4 is moved to the closed position. The lower end of the small extension ring 11 is matched with the upper surface of the small floater to realize the sealing of the small discharge port 3.
Of course, in other embodiments, the sealing assembly may be disposed on the first float and the second float to directly seal with the large discharge port 2 and the small discharge port 3, or may be disposed directly on each of the large discharge port 2 and the small discharge port 3, and extend the sealing ring downward to seal with the top surface of the valve core, and the specific implementation manner is numerous and not limited herein.
In this embodiment, an annular sealing ring or an extension ring is used to seal the large discharge port 2 in cooperation with the carrier 4 and the top surface of the inner cavity of the valve body 1, and can seal the small discharge port 3 in cooperation with the small valve core 6. The provision of the annular member facilitates the closing and opening of the two discharge openings. For example, when the large discharge port 2 is closed or opened, the annular surface at the upper end of the annular part is only required to be attached to the top surface of the inner cavity of the valve body 1, and compared with the sealing mode of sealing parts such as sealing blocks and the like on the discharge port, the attaching area is small, so that the force required for closing and opening the large discharge port is also smaller, and the valve can be opened and closed more flexibly.
Example III
A combination valve includes the sealing structure in the first or second embodiments. By providing a sliding carrier 4 in the valve body 1 and providing a sealing assembly on the carrier 4 and/or the valve cartridge. When the large discharge port 2 needs to be closed, the sealing assembly is matched with the bearing piece 4 to seal the large discharge port 2, meanwhile, a first communication channel which is communicated with the small discharge port 3 through the inner cavity of the valve body 1 can be reserved through the through hole on the bearing piece 4, and when the small discharge port 3 needs to be further closed, the small discharge port 3 can be closed by lifting the small valve core 6 to seal the first communication channel. The two valve cores can be opened and closed by only one bearing piece 4, and the problem that sealing parts of the existing combination valve are required to be arranged separately for the two valve cores is solved.
The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, it is within the scope of the appended claims and their equivalents to fall within the scope of the invention.