Energy-saving type vacuum precise pressure regulating valveTechnical field
The present invention relates to a kind of energy-saving type vacuum precise pressure regulating valve, its body interior be provided with pressure ports, pressure regulation subaisle,And weighing apparatus pressure passageway, by making pressure fluid circulate in foregoing each passage, balance diaphragm is pressurized with main film and produce displacement,Allow body hand-free is continuous to suck air, and can persistently adjusts internal vacuum pressure, not only saved the vacuum source energy but also realized precisionThe purpose of adjustment.
Background technology
The widely used vacuum precision pressure regulator valve of conventional automation equipment field institute, whether at home or outer market instituteThe product of sale, for technology application type, it is necessary to the vacuum pressure of pressure regulator valve could be maintained by lasting suction airPrecision；
Above-mentioned this kind of vacuum precision pressure regulator valve, pressure fluid will certainly be allowed persistently to suck the air of outside in useFlow, though predeterminated target can be reached, the resource spent by process, it will improve cost made in one piece, long-term use is tired outThe long-pending amount of money will be considerable.For the fine and efficiency of lifting automation work flow, also there is professional by using air pressureLoop reduce intake air flow come exchange for high accuracy output pressure, but still suffer from many can improve part, for example, vacuum precision adjustThe design comparison of pressure valve is difficult and structure design and manufactures had complication tendency etc..
In addition, on the basis of existing technology, pressure fluid is produced reciprocity pressure by improveing internal path, makeIt can allow energy loss to be greatly decreased in a manner of feedback, though there is certain effect, in actual applications, above-mentioned improvement pairThe improvement that body interior this problem need to be continued to flow into air does not protrude, and still has a case that operation is not smooth enough, becauseThis must improve disadvantages mentioned above.
The content of the invention
Energy-saving type vacuum precise pressure regulating valve provided by the present invention, its main purpose is, utilizing the several of body interiorPassage, allow pressure fluid to circulate and coordinate main valve doorway and straight-bar valve port, to stablize body interior pressure, and nothingAir inhalation flow need to be utilized to keep balancing, and the pressure fluid can be adjusted by the way that the pressure regulator is accurate, in service efficiencyIt is upper even more ideal.
In structure, a body is sequentially formed by main valve seat, middle valve seat and pressure regulator from the bottom to top, the main valve seat hasThe input and output end that can lead to for pressure fluid flow and the main valve doorway being made up of overflow pipe, and in the overflow pipeTop be provided with main film, and valve seat then has the straight-bar valve port and pressure regulation subaisle being made up of pressure regulation straight-bar in this,And balance diaphragm is provided with the pressure regulation straight-bar, and the main valve seat to straight-bar valve port is provided with a pressure ports, the pressure portsThen be provided with a pressure regulation subaisle to the main film, separately have a weighing apparatus pressure passageway be arranged at pressure regulator to main film and output end itBetween.
By aforementioned structure, circulated using pressure fluid via input in pressure ports, coordinate pressure regulator adjustment masterSpring passage balance diaphragm, can continue to be circulated to pressure regulation subaisle, further sharp by elapsing main film into poised stateExported with weighing apparatus pressure passageway to output end so that body remains to accurate adjustment pressure fluid under the flow without suction atmospheric pressure.
Brief description of the drawings
Fig. 1 is the structural representation when present invention is in SBR.
Figure 1A is the close-up schematic view at A in Fig. 1.
Figure 1B is the close-up schematic view at B in Fig. 1.
Fig. 2 is the structural representation when present invention is in use state.
Fig. 2A is the close-up schematic view at A in Fig. 2.
Fig. 2 B are the close-up schematic view at B in Fig. 2.
Fig. 3 is the structural representation when present invention is in pressure release state.
Fig. 3 A are the close-up schematic view at A in Fig. 3.
Fig. 3 B are the close-up schematic view at B in Fig. 3.
Fig. 4 is the schematic diagram in the air pressure inside loop of the present invention.
Description of reference numerals：
The straight-bar valve port of 1 body 33
2 main valve seats 34 balance diaphragm
The pressure regulator of 21 input 4
The main spring of 22 output end 41
The knob of 23 overflow pipe 42
The leakproof seal part of 231 packing 43
The pressure ports of 24 main valve doorway 5
The pressure regulation subaisle of 25 main film 51
251 hollow holes 52 weighing apparatus pressure passageway
The plasmas channel of 26 throttle orifice 53
Valve seat P pressure fluids in 3
31 pressure regulation straight-bar P1 vacuum sources
311 spout hole P2 vacuum suction sides
32 piston Pt balance pressure
Embodiment
The present invention is a kind of energy-saving type vacuum precise pressure regulating valve, next the embodiment of invention will be carried out with reference to accompanying drawing detailedDescribe in detail it is bright, with help understand the present invention.
The energy-saving type vacuum precise pressure regulating valve has a body (1), and the body (1) is by valve seat in a main valve seat (2), one(3) and a pressure regulator (4), sequentially formed from the bottom to top, the main valve seat (2) has one for a pressure fluid (P) circulationInput (21) and an output end (22) and the main valve doorway (24) being made up of an overflow pipe (23), and overflow at thisThe top of flow tube (23) is additionally provided with a main film (25), and middle valve seat (3) then has the straight-bar being made up of a pressure regulation straight-bar (31)Valve port (33) and a pressure regulation subaisle (51), and the top of the pressure regulation straight-bar (31) is additionally provided with a balance diaphragm (34)；AndThe pressure regulator (4) has a main spring (41), a knob (42) and a leakproof seal part (43), and the main spring (41) is located atIn the pressure regulator (4), the knob (42) of the pressure regulator (4) outside is adjusted by manipulating, main spring (41) contact balance can be madeDiaphragm (34), and leakproof seal part (43) is set on the top of the main spring (41), to prevent the internal pressure of body (1)Fluid (P) thus overflows.
Several passages are additionally provided with the body (1), are respectively：Pressure ports (5), pressure regulation subaisle (51), weighing apparatus pressure passagewayAnd plasmas channel (53) (52).Wherein pressure ports (5) are connected to middle valve seat (3) and to straight-bar valve port by main valve seat (2)(33), and it is provided with a throttle orifice (26)；Pressure regulation subaisle (51) the then position as set by the pressure ports (5) are connected to main film (25)Put；Weighing apparatus pressure passageway (52) is connected to main film (25) and output end (22) by pressure regulator (4)；An and plasmas channel (53)By the lateral margin that middle valve seat (3) are connected to above pressure regulation straight-bar (31).
Pressure regulator (4) adjustment main spring (41) is coordinated through pressure ports (5) by input (21) by pressure fluid (P)Passage balance diaphragm (34), makes pressure fluid (P) to continue to be circulated to pressure regulation subaisle (51), whereby elapses main film (25)Into the poised state of air pressure, further exported using the pressure passageway that weighs (52) to output end (22), make body (1) without suction airPressure, remain to accurate adjustment pressure fluid (P).
Fig. 1~1B is referred to again, and aforementioned pressure fluid (P) has a variety of pressure, wherein there is a vacuum source (P1), inputted(21), pressure ports (5) and interior draw of pressure regulation subaisle (51) is held to be formed；One vacuum suction side (P2), is formed at output end(22), weigh in pressure passageway (52) and the overflow pipe (23)；One balance pressure (Pt), by the vacuum source (P1) in body (1) withVacuum suction side (P2) mutually balance is formed.
Pressure ports (5) are drawn and form vacuum source (P1), in SBR, the vacuum source with input (21)(P1) straight-bar valve port (33) place is only terminated in, therefore vacuum suction side (P2) is equal to balance pressure (Pt) equal to 0, and the vacuum source(P1) it is less than 0；
Now, knob (42) the manipulation adjustment main spring (41) that diaphragm (34) is not affected by pressure regulator (4), the balance are balancedPiston (32) set by below diaphragm (34) not yet supports with the pressure regulation straight-bar (31), the spout hole (311) in the piston (32) then withThe plasmas channel (53) interlinks；And the main valve doorway (24) of overflow pipe (23) is in closed mode.
Figure is referred to againAnd Fig. 4, it is the in running order schematic diagram of the present invention, and vacuum now is inhaledEnter end (P2) and be less than 0, and vacuum source (P1) is less than balance pressure (Pt) and is less than vacuum suction side (P2)；Turned by pressure regulator (4)Dynamic knob (42) allows main spring (41) to press downwards, balance diaphragm (34) is promoted piston (32), and closes spout hole (311),And promote pressure regulation straight-bar (31) to open straight-bar valve port (33) downwards, vacuum source (P1) now then can by throttle orifice (26) withPressure ports (5) enter pressure regulation subaisle (51), and in main film (25) balance pressure (Pt) formed below；And vacuum sucksThe vacuum pressure for holding (P2) to be formed can be by the pressure passageway that weighs (52) to main film (25) top, passage main film (25)；Throttle orifice(26) effect can reduce vacuum source (P1) inhalation flow, the variation of balance pressure (Pt) is unlikely to too acutely, main film(25) pressure balance also can smoothly be reached, when forming the working condition of balance, straight-bar valve port (33) can close upwards, andLower section main valve (24) is opening, and vacuum source (P1) enters in main valve body (2) whereby, forms output pressure, recirculation is extremelyVacuum suction side (P2).
Figure is referred to againIt is in the schematic diagram of pressure release state for the present invention, and vacuum source (P1) now is equal to0, and under normal pressure release state, the main spring (41) in pressure regulator (4) can allow straight-bar valve port (33) to be opened, and close the overflowHole (311), and the air of vacuum source (P1) is entered under main film (25) through straight-bar valve port (33) and pressure regulation subaisle (51)Square destruction of balance pressure (Pt), and push main film (25) open, pressed by the hollow hole (251) set by main film (25) center with weighing apparatusPassage (52) enters to vacuum suction side (P2) and destroys output pressure, and main valve doorway (24) are in closed mode；
In addition, when body (1) internal balance pressure (Pt) and vacuum suction side (P2) pressure difference are not big enough, internal main film(25) easily produce clamping, can not smooth pressure release, therefore be provided with a packing (231) in overflow pipe (23) bottom, air list can be suppliedTo packing (231) is pushed open, using the external diameter surface of overflow pipe (23), the center for enabling air to smoothly flow into overflow pipe (23) is straightHole, then the air of vacuum source (P1) is entered to vacuum suction side (P2) by the pressure passageway that weighs (52) and destroy output pressure.
The area of vacuum suction side (P2) is multiplied by the income value of the vacuum suction side (P2) suffered by above-mentioned balance diaphragm (34)When the ratio between income value of the balance pressure (Pt) is multiplied by with the area of balance pressure (Pt) more than or equal to more than 5, throttle orifice (26)Diameter below 0.5, can effectively improve the stable state of vacuum suction side (P2) pressure.
In summary, energy-saving type vacuum precise pressure regulating valve of the invention, by different working conditions, this can be had a clear understanding ofThe internal each passage of body (1), coordinates main valve doorway (24) and straight-bar valve port (33), can be without persistently sucking atmospheric pressure flowIn the case of, the Vacuum Balance in body (1) is maintained, and remain to carry out the accurate adjustment of pressure by pressure regulator (4), make its sectionThe benefit for saving the vacuum source energy has actual usability.
Construction, feature and the action effect of the present invention, above institute is described in detail according to diagrammatically shown embodiment aboveOnly presently preferred embodiments of the present invention is stated, but the present invention is not to limit practical range shown in drawing, it is every according to structure of the inventionWant made change, or be revised as the equivalent embodiment of equivalent variations, when still without departing from specification and illustrating covered spirit,All should be within the scope of the present invention.