SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a plane sealed multi-way control valve, simple structure, control convenience, small in size, energy consumption are low, can intermittently control the break-make of return circuit fluid by turns.
The utility model provides a scheme as follows of above-mentioned technical problem:
The plane sealing type multi-path control valve comprises a valve body, a bearing cover, a rotating shaft, a driving disc, a pre-tightening spring and a fixed disc, wherein the valve body is of a hollow structure, the rotating shaft is positioned in the valve body, the bearing cover is installed on the top surface of the valve body, the upper end of the rotating shaft extends out of the bearing cover, the pre-tightening spring is sleeved outside the rotating shaft, the driving disc is in clearance fit connection with the lower end of the rotating shaft, the upper end of the pre-tightening spring props against a shoulder of the rotating shaft, the lower end of the pre-tightening spring props; the valve body is provided with a liquid inlet, the driving disc is provided with a flow port, and the fixed disc is provided with a plurality of liquid outlets.
The center of the driving disc is provided with a non-circular hole, and the lower end of the rotating shaft is inserted into the non-circular hole and is in clearance fit with the non-circular hole.
The number of the liquid outlets is 3-6.
A sealing gasket is arranged between the valve body and the fixed disc, and a sealing ring is arranged between the rotating shaft and the bearing cover.
The utility model discloses for prior art have following advantage:
The plane sealing type multi-path control valve has the advantages that the external driving mechanism enables the rotating shaft to rotate to drive the driving disc to rotate, and the relative position of the flow opening of the driving disc and the liquid outlet of the fixed disc is changed, so that the conduction or the disconnection of a path is realized, and the on-off of multi-path fluid can be intermittently and alternately realized. The driving disc and the fixed disc are sealed by a plane, the sealing pressure mainly depends on the pressure of liquid, the pressure is uniform, the sealing effect is reliably ensured, and the plane is simpler than the curved surface sealing; the pressure liquid of the communicated passage forms bolt anchoring force to lock the relative position of the driving disc and the fixed disc, so that the accidental rotation of the driving disc and the fixed disc can be prevented, the preset passage is ensured to be always communicated, and a driving mechanism is not required to provide locking force; the friction resistance of the relative rotation of the driving disk and the fixed disk is tangential force which is very small, and the power of the driving mechanism only needs to be very small; the control valve only needs to be driven by electric power at the moment when the on and off of the control valve need to be switched, and the control valve does not need electric power when being kept on or off, so that the energy is saved, and the use cost is extremely low. The utility model discloses avoid the thinking of a control valve of usual all the way, the fluid leads to, only uses electric power in the twinkling of an eye of disconnected conversion, saves electric power widely and actuating mechanism can not generate heat, has avoided keeping switching on or keeping the condition that needs for the solenoid valve circular telegram for a long time to generate heat among the current solenoid valve switching technology simultaneously. The utility model is suitable for controlling flammable and explosive fluid; the overall structure layout is compact, pipelines and lines are few, and the failure rate is low; the device is especially reasonable and efficient for the application of intermittently and alternately realizing the on-off of the fluid, and has certain application value.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
The planar sealing type multi-way control valve shown in fig. 1-8 comprises a valve body 1, a bearing cover 2, a rotating shaft 3, a driving disc 4, a pre-tightening spring 5 and a fixed disc 6, wherein the valve body 1 is of a hollow structure and is in threaded connection with the fixed disc 6 to form a containing cavity. The rotating shaft 3 is positioned in the valve body 1, the bearing cover 2 is installed on the top surface of the valve body 1, the upper end of the rotating shaft 3 extends out of the bearing cover 2, the pre-tightening spring 5 is sleeved outside the rotating shaft 3, the driving disc 4 is in clearance fit connection with the lower end of the rotating shaft 3, the upper end of the pre-tightening spring 5 props against the shoulder of the rotating shaft 3, the lower end props against the driving disc 4, the fixed disc 6 is installed on the bottom surface of the valve body 1, and the driving disc 4 is; open on the valve body 1 and have inlet 7, inlet 7 is the screw thread through-hole, communicates with each other with 1 hollow portion of valve body, external inlet liquid pipeline, and 4 division of driving disk have circulation mouth 8, and 6 divisions of fixed disk have 4 liquid outlets 9, and liquid outlet 9 is the screw thread through-hole, can communicate with each other with hollow portion through 4 last circulation mouths 8 of driving disk respectively. The circle center of the driving disc 4 is provided with a square hole 10, and the lower end of the rotating shaft 3 is inserted into the square hole 10 and is in clearance fit. A sealing gasket 11 is arranged between the valve body 1 and the fixed disk 6, a sealing ring 12 is arranged between the rotating shaft 3 and the bearing cover 2, and the bearing cover 2 is in threaded connection with the valve body 1 and is sealed through the sealing gasket (not shown in the figure) to prevent fluid from leaking from the cavity of the valve body 1.
One end of the rotating shaft 3 is connected with a power mechanism, and the other end of the rotating shaft is in shape positioning and clearance fit with the square hole 10 of the driving disc 4 through a square shaft. The rotating shaft 3 can drive the driving disk 4 to rotate, and the driving disk 4 can axially move for a small distance and relatively rotate for a small angle. A pre-tightening spring 5 is sleeved in the rotating shaft 3 in a hollow mode, one end of the pre-tightening spring 5 abuts against a shaft shoulder of the rotating shaft 3, the other end of the pre-tightening spring abuts against the driving disc 4, and the driving disc 4 abuts against the fixed disc 6 to form initial sealing.
the rotating shaft 3 is supported on the valve body 1 through a bearing seat and penetrates through the valve body 1 upwards to form a supporting structure. The rotating shaft 3 is in clearance fit with the driving disc 4 downwards.
When the valve is not communicated with liquid to work, the driving disc 4 and the fixed disc 6 are tightly pressed and attached by the elasticity of the pre-tightening spring 5, so that impurities are prevented from entering a matching plane to form initial sealing; when the valve is filled with liquid, the driving disk 4 and the fixed disk 6 uniformly act on the plane of the driving disk 4 by the pressure of the liquid, so that the driving disk 4 and the fixed disk 6 are tightly attached to realize plane sealing, and the leakage of a non-working passage is prevented. Because the possible leakage direction of the fluid is perpendicular to the sealing surfaces formed by the driving disk 4 and the fixed disk 6, almost no leakage is possible, and the contact pressure of the sealing surfaces is increased simultaneously with the increase of the fluid pressure, so that the sealing performance is better.
The geometric center of the driving disc 4 is provided with a square hole 10, a circulation port 8 is arranged at a certain distance from the geometric center, and the end surface of the fixed disc 6 is provided with a certain number of liquid outlets 9. Of course, the number, the position distribution and the diameter of the liquid outlets 9 can be set according to actual needs. The square hole 10 is in clearance fit with the rotating shaft 3, and can axially slide relatively and swing relatively, so that the driving disc 4 and the fixed disc 6 can be freely attached without interference, and the sealing effect is ensured.
In order to ensure the sealing performance of the contact plane of the driving disk 4 and the fixed disk 6, reduce the manufacturing cost and prolong the service life, the contact surface of the driving disk 4 and the fixed disk 6 can be made of wear-resistant and convenient-to-process materials such as steel, cast iron, alloy, ceramics and the like, and can also be made of materials with high flatness and small roughness such as glass and the like, and combined materials and composite materials thereof.
The driving disc 4 and the fixed disc 6 are sealed by planes, the sealing pressure mainly depends on the pressure of liquid, and the liquid pressure is uniformly distributed on the driving disc 4, so that the pressure between the driving disc 4 and the fixed disc 6 is uniformly distributed, the contact surface of the driving disc 4 and the fixed disc 6 cannot be warped and can be reliably attached, the leakage path is vertical to the sealing pressure, the leakage possibility is reliably ensured to be extremely low, the sealing effect is good, and the sealing effect is better when the liquid pressure is higher; the relative rotation of the contact surfaces of the driving disk 4 and the fixed disk 6 is similar to the running-in function between planes, the longer the running-in time is, the better the fit between the driving disk and the fixed disk is, and the sealing performance can not be reduced due to the abrasion of long-term use. The pressure liquid of the communicated passage forms bolt anchoring force to lock the relative position of the driving disk 4 and the fixed disk 6, so that the driving disk 4 can be prevented from moving without a driving mechanism for providing locking force; the frictional resistance of the relative rotation of the driving disk 4 and the fixed disk 6 is tangential force which is very small, and the power of the driving mechanism only needs to be very small.
The rotating shaft 3 is connected with the power mechanism through the upper end, the lower end is in clearance fit connection with the driving disc 4, when the power mechanism drives the rotating shaft 3, the rotating shaft 3 drives the driving disc 4 to rotate to a proper position, and a flow port 8 on the driving disc 4 is communicated with a certain liquid outlet 9 on the fixed disc 6, liquid flowing into the accommodating cavity through the liquid inlet 7 can flow outwards from the flow port; the driving disk 4 seals the other three liquid outlets 9 on the fixed disk 6 through the contact plane with the fixed disk 6, so that the three passages are disconnected. The rotating driving disk 4 can intermittently and alternately open four passages. When the driving disk 4 is rotated to another proper position, the four liquid outlets 9 on the fixed disk 6 can be completely closed, so that the four passages are disconnected, and liquid is not supplied to the outside. Therefore, the control valve can realize multiple practical functions of opening other liquid outlets 9 to be disconnected, disconnecting all the liquid outlets 9 and the like of a certain liquid outlet 9, and the fluid on-off control application of one inlet and four outlets can be realized.
As an alternative, a plurality of flow ports 8 may be provided on the driving disk 4, and the positions and diameters of the liquid outlets 9 on the fixed disk 6 may be changed to obtain a combination scheme for controlling multiple paths and multiple diameters simultaneously.
Furthermore, the driving disk 4 is finely adjusted to finely adjust the flow area of the relative conduction passage between the flow port 8 and the liquid outlet 9 on the fixed disk 6, so that the flow rate of the liquid flowing out is changed, the flow rate of the liquid in the passage can be steplessly changed from zero to the set maximum value, and the function of steplessly adjusting the flow rate is realized.
Further, as shown in fig. 9, the shape of the communication port 8 provided in the driving disk 4 may be changed, for example, a circular arc-shaped hole.
As an alternative, the liquid inlet 7 may be disposed in a radial direction of the valve body 1 (as in the present embodiment), or may be disposed in an axial direction of the valve body 1.
As an alternative, the square holes and the square shafts arranged on the driving disk 4 and the rotating shaft 3 can be arranged in other non-circular shapes which are beneficial to shape positioning. The control valve only needs to be driven by electric power at the moment when the on and off of the control valve need to be switched, and does not need electric power when the on or off of the control valve is kept, so that the situation that the electromagnetic valve needs to be electrified and heated for a long time when the on or off of the control valve is kept in the existing electromagnetic valve switching technology is avoided, and the control valve is still suitable for controlling flammable and explosive fluids.
The power mechanism can be a steering engine, a stepping motor, a speed reducing motor, a hydraulic pneumatic motor and other power equipment which has low rotating speed, easy positioning and certain torque.
The above is the preferred embodiment of the present invention, but the embodiment of the present invention is not limited by the above, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be equivalent replacement modes, and all are included in the scope of the present invention.