CN110848437A - Diaphragm type pressure reducing valve capable of allowing high pressure to enter and low pressure to exit - Google Patents
Diaphragm type pressure reducing valve capable of allowing high pressure to enter and low pressure to exit Download PDFInfo
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- CN110848437A CN110848437A CN201911334317.8A CN201911334317A CN110848437A CN 110848437 A CN110848437 A CN 110848437A CN 201911334317 A CN201911334317 A CN 201911334317A CN 110848437 A CN110848437 A CN 110848437A
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- diaphragm
- valve
- seat
- pressure reducing
- hole
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/20—Excess-flow valves
- F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
- F16K17/24—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member
- F16K17/28—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only
- F16K17/30—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only spring-loaded
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/42—Valve seats
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/60—Handles
Abstract
A diaphragm type pressure reducing valve for high pressure inlet and low pressure outlet belongs to the technical field of diaphragm type pressure reducing valves; the pressing nut sealing element, the valve seat bearing seat and the valve seat are fixed in the pressing nut fixing hole through the pressing nut, when the pressing nut presses the valve seat bearing seat downwards, the upper end face of the valve seat bearing seat abuts against the lower end face of the pressing nut, the lower end face of the valve seat bearing seat abuts against the bottom end face of the pressing nut fixing hole, and the valve seat bearing seat supports the valve seat and the pressing nut sealing element simultaneously when being fixed, so that the valve seat bearing seat is realized, the bearing pressure of the valve seat is greatly improved, and the high-pressure impact of 6000psig of inlet air can be guaranteed to be borne for a long time; the whole strength of the diaphragm is improved by the arrangement of the diaphragm sleeve, so that the pressure bearing is improved, the diaphragm and the diaphragm are tightly sleeved on the diaphragm lower seat by the diaphragm upper seat, and the outer edges of the diaphragm and the diaphragm sleeve are locked and fixed with the outer ring surface at the upper end of the pressure reducing valve body by the diaphragm pressing step, so that the effects that the air inlet can reach 6000psig and the air outlet can reach 750psig are achieved.
Description
Technical Field
The invention belongs to the technical field of diaphragm type pressure reducing valves, and particularly relates to a diaphragm type pressure reducing valve with high pressure inlet and low pressure outlet.
Background
The pressure reducing valve is a valve which reduces the inlet pressure to a certain required outlet pressure through regulation and leads the outlet pressure to automatically keep stable by relying on the energy of the medium. From the viewpoint of hydrodynamics, the pressure reducing valve is a throttling element with variable local resistance, namely, the flow speed and the kinetic energy of fluid are changed by changing the throttling area to cause different pressure losses, thereby achieving the purpose of pressure reduction. The pressure reducing valve is regulated by a control and regulation system, so that the fluctuation of the pressure behind the valve is balanced with the spring force, and the pressure behind the valve is kept constant within a certain error range.
However, the air inlet of the common diaphragm pressure reducing valve can only reach 3500psig and the air outlet of 500psig, only a single diaphragm is arranged in the common diaphragm pressure reducing valve, the single diaphragm is easy to deform and break when the pressure is too high, so that the pressure bearing capacity is weak, and the valve seat is easy to deform after the air inlet pressure is increased due to the combination of a pressing nut and a valve seat which are arranged in the valve, so that the precision of the pressure reducing valve is reduced, and the pressure bearing capacity of the pressure reducing valve is weak. Therefore, a diaphragm type pressure reducing valve for supplying high pressure and low pressure is needed.
Disclosure of Invention
The invention mainly solves the technical problems in the prior art and provides a diaphragm type pressure reducing valve which can realize high pressure inlet and low pressure outlet.
The technical problem of the invention is mainly solved by the following technical scheme: a diaphragm type pressure reducing valve capable of feeding high pressure and discharging low pressure comprises a pressure reducing valve body, a bonnet nut, a bonnet and a handle, wherein an air inlet hole is formed in the lower right side of the pressure reducing valve body, an air outlet hole is formed in the lower left side of the pressure reducing valve body, internal threads are formed in the inner rings of the air inlet hole and the air outlet hole, a valve rod cavity is vertically arranged in the middle of the pressure reducing valve body, a valve rod pin positioning hole is formed in the center of the bottom of the valve rod cavity, the outer diameter of the valve rod pin positioning hole is smaller than the inner diameter of the valve rod cavity, a first air vent is formed between the lower right side of the valve rod cavity and the air inlet hole, the valve rod cavity is communicated with the air inlet hole through the first air vent, a pressure reducing cavity is formed in the upper end of the pressure reducing valve body, a pressing nut fixing hole is formed in the upper side of the, the upper end of the pressing nut sealing element is provided with a valve seat bearing, the upper end of the valve seat bearing is provided with a valve seat, the upper end of the valve seat is provided with a pressing nut, the outer side of the upper end part of the pressing nut is provided with a pressing ring, the pressing ring is positioned on the upper side of the bottom of the decompression cavity, the pressing nut and the pressing nut fixing hole are fixed through threads, the pressing nut sealing element, the valve seat bearing and the valve seat are all pressed on the lower side by the pressing nut, a valve rod is arranged in the valve rod cavity, the lower end of the valve rod is provided with a valve rod pin, the outer diameter of the valve rod pin is smaller than that of the valve rod, the lower end of the valve rod pin is arranged in a valve rod pin positioning hole, the valve rod pin and the valve rod pin positioning hole are in clearance fit, a valve rod spring is arranged on the outer ring of the valve rod pin, the center of sticising the nut sealing member is equipped with down the horn mouth, the opening of horn mouth is down, the center of disk seat bearing is equipped with the bearing round hole, the center of disk seat is equipped with the disk seat round hole, the lower tip of sticising the nut center is equipped with the through-hole, the upper end of sticising the nut center is equipped with loudspeaker form gas outlet, the opening of loudspeaker form gas outlet up, the lower opening and the through-hole of loudspeaker form gas outlet are connected, the upper end of valve rod is coniform, the upper end of valve rod is equipped with the ejector pin, the external diameter of ejector pin is less than the external diameter of valve rod, the lower tip of ejector pin is located in the through-hole, the internal diameter of through-hole is greater than the external diameter of ejector pin, the disk seat round hole is the same with the internal diameter of through-hole, the upper end of ejector pin is located, The inner diameters of the opening and the bearing circular hole are larger than the outer diameter of the upper end part of the valve rod, the upper end of the valve rod is arranged at the inner side of the valve seat circular hole, one side, close to the valve seat circular hole, of the lower end of the valve seat is provided with a semicircular head, the semicircular head is movably attached to the upper end part of the valve seat, an air outlet through hole is formed between the left side of the bottom part of the pressure reducing cavity and the air outlet hole, the outer side of the upper end part of the pressure reducing valve body is provided with external threads, a valve cover mounting ring platform is arranged on the outer ring surface of the upper end part of the pressure reducing valve body and is arranged at the upper side of the pressure reducing valve body, the valve cover is arranged at the upper side of the pressure reducing valve body, a valve cover mounting opening is formed at the lower end of the valve cover, the valve cover mounting opening is mounted, the spring pressing cover is in an inverted convex shape, the lower end part of the spring pressing cover is arranged in an inner ring at the upper end part of a die spring, a screw head positioning hole is arranged at the center of the upper end of the spring pressing cover, a screw supporting threaded hole is arranged at the center of the upper end of the valve cover, a second vent hole is arranged at the left lower side of the valve cover and is communicated with a valve cover cavity, a diaphragm pressing step is arranged at the lower side of the inner ring of the valve cover mounting opening and is in an inclined shape, a diaphragm upper seat limiting step is arranged at the upper side of the inner ring of the valve cover mounting opening, a diaphragm lower seat is arranged right above a pressing nut, a top post is arranged at the lower side of the center of the diaphragm lower seat and is arranged right above a top rod, a diaphragm supporting disc is arranged at the outer side of the lower end part of the diaphragm lower seat, the outer ring, the outer ring of the diaphragm sleeve is provided with a downward bent flanging, the upper side of the diaphragm sleeve is provided with a diaphragm, the outer ring edges of the diaphragm sleeve and the diaphragm extend to the outer side of the upper end of the pressure reducing valve body, the inner sides of the diaphragm sleeve and the diaphragm are abutted against the lower diaphragm seat, the upper side between the diaphragm and the lower diaphragm seat is provided with a diaphragm sealing element, the upper side of the lower diaphragm seat is provided with an upper diaphragm seat, the inner side of the upper diaphragm seat is fixedly connected with the outer side of the upper end part of the lower diaphragm seat through threads, the diaphragm and the diaphragm sleeve are fixed on the lower diaphragm seat by the upper diaphragm seat, the outer side of the lower end part of the upper diaphragm seat is provided with a diaphragm limiting disc, the inner side of the bottom of the diaphragm limiting disc and the outer side of the bottom of the diaphragm limiting disc are in an upward inclined shape, the upper diaphragm seat is arranged in the inner ring of the lower end part of the die spring, the upper side of the bonnet nut is provided with an internal compression ring, the bonnet nut is fixed between the pressure reducing valve body and the bonnet through external threads, the internal compression ring compresses a bonnet mounting opening into the bonnet nut, the diaphragm compression step is attached to the outer ring face of the upper end of the pressure reducing valve body, the outer ring edges of the diaphragm and the diaphragm sleeve are locked and fixed by the diaphragm compression step and the outer ring face of the upper end of the pressure reducing valve body, a screw is arranged in a screw supporting threaded hole, the lower end of the screw is arranged in a bonnet cavity, the lower end of the screw is provided with a screw top which is arranged in a screw head positioning hole, the middle of the screw is provided with two screw nuts, the upper end of the screw is arranged at the center of the handle, the upper end of the screw is provided with a locking nut, the lower side of the locking nut is provided with an elastic washer, and the locking nut, the lower end of the handle is in sliding connection with the outer side of the valve cover, and a handle gland is arranged in the center of the upper end of the handle.
Preferably, the inclination of the outer ring surface of the upper end portion of the pressure reducing valve body is the same as that of the diaphragm pressing step.
Preferably, the outer diameter of the diaphragm is larger than the outer diameter of the diaphragm sleeve.
Preferably, the outer side part of the diaphragm limiting disc is arranged below the diaphragm upper seat limiting step, and the outer diameter of the diaphragm limiting disc is smaller than the inner diameter of the diaphragm upper seat limiting step.
Preferably, the depth of the valve rod pin positioning hole is larger than the contraction degree of the valve rod spring.
Preferably, a lower cavity is arranged on the lower side of the valve seat base, an upper cavity is arranged on the upper side of the valve seat base, the pressing nut sealing piece is arranged in the lower cavity, and the valve seat is arranged in the upper cavity.
As preferred, valve rod round pin and ejector pin all adopt the material of 17-4PH, the material of PCTFE is adopted to the disk seat, the material of hastelloy-C22 is adopted to the diaphragm, diaphragm seal spare, sticis the material that nut seal spare and diaphragm cover all adopted PTFE, handle and handle gland adopt the material of ABS, the mould spring adopts the material of spring steel, elastic washer, screw rod, bonnet nut, screw rod nut, spring gland and valve gap all adopt 304 stainless steel, seat, diaphragm seat, sticis the nut, valve seat bearing, valve rod spring and relief pressure valve body all adopt 316 stainless steel under the diaphragm.
The invention has the following beneficial effects: the pressing nut sealing element, the valve seat bearing seat and the valve seat are fixed in the pressing nut fixing hole through the pressing nut, when the pressing nut presses the valve seat bearing seat downwards, the upper end face of the valve seat bearing seat abuts against the lower end face of the pressing nut, the lower end face of the valve seat bearing seat abuts against the bottom end face of the pressing nut fixing hole, and the valve seat bearing seat supports the valve seat and the pressing nut sealing element simultaneously when being fixed, so that the valve seat bearing seat is realized, the bearing pressure of the valve seat is greatly improved, and the high-pressure impact of 6000psig of inlet air can be guaranteed to be borne for a long time; the arrangement of the diaphragm sleeve improves the overall strength of the diaphragm, so that the pressure bearing is improved, the diaphragm and the diaphragm are tightly sleeved on the diaphragm lower seat by the diaphragm upper seat, and the outer edges of the diaphragm and the diaphragm sleeve are locked and fixed with the outer ring surface at the upper end of the pressure reducing valve body by the diaphragm pressing step, so that the effects that the air inlet can reach 6000psig and the air outlet can reach 750psig are achieved; the handle is rotated to rotate the screw rod, so that the screw rod is lifted up and down, and the two screw rod nuts can limit the descending stroke of the screw rod, thereby realizing the effect of controlling the air outlet pressure; when the screw rod descends, the screw rod top head pushes the spring gland, the spring gland pushes the diaphragm upper seat through the die spring to realize downward compression of the diaphragm, the ejector rod is pushed downwards by the ejector column to enable the valve rod to move downwards, at the moment, the semicircular head is separated from the upper end of the valve seat, the air pressure enters the decompression cavity through the air inlet hole, the first vent hole, the valve rod cavity, the lower bell mouth, the bearing circular hole, the valve seat circular hole, the through hole and the horn-shaped air outlet, and the effect of reducing the air pressure is realized through downward adjustment of the diaphragm; when the diaphragm moves downwards, negative pressure can be generated in the valve cover cavity, and the effect that the negative pressure is not generated in the valve cover cavity is ensured through the vent hole; the diaphragm limiting disc is characterized in that the inner side of the bottom of the diaphragm limiting disc and the outer side of the bottom of the diaphragm limiting disc are inclined upwards, so that the inclined plane of the bottom of the diaphragm limiting disc can support the diaphragm downwards when the diaphragm is compressed downwards, and the effect of supporting the strength of the diaphragm is achieved.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention;
FIG. 2 is a schematic illustration of one construction of the pressure relief valve body of the present invention;
FIG. 3 is a schematic view of one construction of the valve closure of the present invention;
FIG. 4 is a schematic view of one construction of the bonnet nut of the present invention;
FIG. 5 is an enlarged view of portion A of FIG. 1;
FIG. 6 is a schematic view of a connection configuration of the packing nut, valve seat retainer and packing nut of the present invention;
FIG. 7 is a schematic view of a connection structure of the diaphragm upper seat, the diaphragm sleeve and the diaphragm lower seat according to the present invention;
FIG. 8 is an enlarged view of portion B of FIG. 3;
FIG. 9 is an enlarged view of part C of FIG. 6;
fig. 10 is an enlarged schematic view of a portion D of fig. 7.
In the figure: 1. a pressure reducing valve body; 2. a bonnet nut; 3. a valve cover; 4. a handle; 5. an air inlet; 6. an air outlet; 7. an internal thread; 8. a valve stem cavity; 9. valve stem pin locating holes; 10. a first vent hole; 11. a decompression chamber; 12. pressing the nut fixing hole; 13. pressing the nut seal; 14. a valve seat support; 15. a valve seat; 16. pressing the nut; 17. a compression ring; 18. a valve stem; 19. a valve stem pin; 20. a valve stem spring; 21. a lower bell mouth; 22. a bearing circular hole; 23. a valve seat circular hole; 24. an air outlet through hole; 25. a trumpet-shaped air outlet; 26. a top rod; 27. a semicircular head; 28. an air outlet through hole; 29. an external thread; 30. the valve cover is provided with a ring platform; 31. a valve cover mounting opening; 32. a valve cap cavity; 33. a die spring; 34. a spring gland; 35. positioning holes of the screw head; 36. the screw rod supports the threaded hole; 37. a second vent hole; 38. the diaphragm compresses the step; 39. a diaphragm upper seat limiting step; 40. a diaphragm lower seat; 41. a top pillar; 42. a diaphragm support disk; 43. a membrane sleeve; 44. flanging; 45. a membrane; 46. a diaphragm seal; 47. a membrane upper seat; 48. a diaphragm limiting disc; 49. an inner compression ring; 50. a screw; 51. a screw top; 52. a screw nut; 53. locking the nut; 54. an elastic washer; 55. a handle gland; 56. a lower chamber; 57. an upper chamber.
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.
Example (b): a diaphragm type pressure reducing valve capable of supplying high pressure and low pressure comprises a pressure reducing valve body, a bonnet nut, a bonnet and a handle, and is characterized in that an air inlet hole is formed in the lower right side of the pressure reducing valve body, an air outlet hole is formed in the lower left side of the pressure reducing valve body, internal threads are formed in inner rings of the air inlet hole and the air outlet hole, a valve rod cavity is vertically formed in the middle of the pressure reducing valve body, a valve rod pin positioning hole is formed in the center of the bottom of the valve rod cavity, the outer diameter of the valve rod pin positioning hole is smaller than the inner diameter of the valve rod cavity, a first vent hole is formed between the lower right side of the valve rod cavity and the air inlet hole, the valve rod cavity is communicated with the air inlet hole through the first vent hole, a pressure reducing cavity is formed in the upper end of the pressure reducing valve body, a pressing nut fixing hole is formed in the upper, the bottom of the pressing nut fixing hole is provided with a pressing nut sealing element, the upper end of the pressing nut sealing element is provided with a valve seat bearing, the upper end of the valve seat bearing is provided with a valve seat, the upper end of the valve seat is provided with a pressing nut, the outer side of the upper end part of the pressing nut is provided with a pressing ring, the pressing ring is positioned on the upper side of the bottom of the decompression cavity, the pressing nut and the pressing nut fixing hole are fixed through threads, the pressing nut sealing element, the valve seat bearing and the valve seat are all pressed on the lower side by the pressing nut, a valve rod is arranged in the valve rod cavity, the lower end of the valve rod is provided with a valve rod pin, the outer diameter of the valve rod pin is smaller than that of the valve rod, the lower end of the valve rod pin is arranged in a valve rod pin positioning hole, the valve rod pin and the valve rod pin positioning hole are in clearance, the lower end of the valve rod spring is in contact with the bottom of the valve rod cavity, the center of the pressing nut sealing piece is provided with a lower horn mouth, the opening of the lower horn mouth faces downwards, the center of the valve seat is provided with a seat round hole, the center of the valve seat is provided with a valve seat round hole, the lower end of the pressing nut center is provided with a through hole, the upper end of the pressing nut center is provided with a horn-shaped air outlet, the opening of the horn-shaped air outlet faces upwards, the lower opening of the horn-shaped air outlet is connected with the through hole, the upper end of the valve rod is conical, the upper end of the valve rod is provided with an ejector rod, the outer diameter of the ejector rod is smaller than that of the valve rod, the lower end of the ejector rod is arranged in the through hole, the inner diameter of the through hole is larger than that of the ejector rod, the inner diameters of the valve seat round, the inner diameters of the lower horn mouth, the opening and the bearing seat round hole are larger than the outer diameter of the upper end part of the valve rod, the upper end of the valve rod is arranged at the inner side of the valve seat round hole, one side of the lower end of the valve seat, which is close to the valve seat round hole, is provided with a semi-circular head, the semi-circular head is movably attached to the upper end part of the valve seat, a gas outlet through hole is arranged between the left side of the bottom part of the pressure reducing cavity and the gas outlet hole, the outer side of the upper end part of the pressure reducing valve body is provided with an external thread, the outer ring surface of the upper end part of the pressure reducing valve body is provided with a valve cover mounting ring platform, the valve cover mounting ring platform is arranged at the upper side of the external thread, the outer ring surface of the upper end part of the pressure reducing valve body outwards inclines downwards, the die is characterized in that a spring gland is arranged on the upper side of a die spring, the spring gland is inverted-convex, the lower end of the spring gland is arranged in an inner ring at the upper end of the die spring, a screw head positioning hole is formed in the center of the upper end of the spring gland, a screw supporting threaded hole is formed in the center of the upper end of the valve cover, a second vent hole is formed in the left lower side of the valve cover and communicated with a valve cover cavity, a diaphragm pressing step is arranged on the lower side of an inner ring of a valve cover mounting opening and is inclined, a diaphragm upper seat limiting step is arranged on the upper side of the inner ring of the valve cover mounting opening, a diaphragm lower seat is arranged right above a pressing nut, a top post is arranged on the lower side of the center of the diaphragm lower seat and is arranged right above a top post, a diaphragm supporting disc is arranged on the outer side of the lower, the upper side of the diaphragm supporting disc is provided with a diaphragm sleeve, the outer ring of the diaphragm sleeve is provided with a downward bent flanging, the upper side of the diaphragm sleeve is provided with a diaphragm, the outer ring edges of the diaphragm sleeve and the diaphragm both extend to the outer side of the upper end of the pressure reducing valve body, the inner sides of the diaphragm sleeve and the diaphragm are close to the lower diaphragm seat, the upper side between the diaphragm and the lower diaphragm seat is provided with a diaphragm sealing element, the upper diaphragm seat is arranged on the upper diaphragm seat, the inner side of the upper diaphragm seat is fixedly connected with the outer side of the upper end part of the lower diaphragm seat through threads, the diaphragm and the diaphragm sleeve are fixed on the lower diaphragm seat by the upper diaphragm seat, the outer side of the lower end part of the upper diaphragm seat is provided with a diaphragm limiting disc, the inner side of the bottom of the diaphragm limiting disc is upwards inclined with the outer side of the bottom of the diaphragm limiting disc, the upper diaphragm seat is arranged in, the lower end of the die spring is close to the upper side face of the diaphragm limiting disc, an inner compression ring is arranged on the upper side of the bonnet nut, the bonnet nut is fixed between the pressure reducing valve body and the bonnet through external threads, the inner compression ring compresses a bonnet mounting opening in the bonnet nut, the diaphragm compression step is attached to the outer ring face of the upper end of the pressure reducing valve body, the outer ring edges of the diaphragm and the diaphragm sleeve are locked and fixed with the outer ring face of the upper end of the pressure reducing valve body through the diaphragm compression step, a screw is arranged in a screw supporting threaded hole, the lower end of the screw is arranged in a bonnet cavity, the lower end of the screw is provided with a screw top which is arranged in a screw head positioning hole, the middle of the screw is provided with two screw nuts, the upper end of the screw is arranged at the center of the handle, the upper end of the screw is provided with a locking, the locking nut and the elastic washer fix the screw rod at the center of the handle, the lower end of the handle is in sliding connection with the outer side of the valve cover, and a handle gland is arranged at the center of the upper end of the handle.
The outer ring surface of the upper end of the pressure reducing valve body and the diaphragm pressing step have the same gradient, so that the diaphragm and the outer ring edge of the diaphragm sleeve are locked and fixed by the diaphragm pressing step and the outer ring surface of the upper end of the pressure reducing valve body.
The outer diameter of the diaphragm is larger than that of the diaphragm sleeve, so that the whole diaphragm is supported by the diaphragm sleeve.
The outer side part of the diaphragm limiting disc is arranged below the diaphragm upper seat limiting step, the outer diameter of the diaphragm limiting disc is smaller than the inner diameter of the diaphragm upper seat limiting step, and the diaphragm limiting disc is fixed in the diaphragm upper seat limiting step when the diaphragm upper seat resets.
The depth of the valve rod pin positioning hole is larger than the shrinkage of the valve rod spring, so that the valve rod pin can move downwards.
A lower cavity is arranged on the lower side of the valve seat bearing seat, an upper cavity is arranged on the upper side of the valve seat bearing seat, the pressing nut sealing piece is arranged in the lower cavity, and the valve seat is arranged in the upper cavity; the pressing nut sealing piece is pressed through the pressing nut, the valve seat bearing and the valve seat are fixed in the pressing nut fixing hole, when the pressing nut presses the valve seat bearing, the upper end face of the valve seat bearing abuts against the lower end face of the pressing nut, the lower end face of the valve seat bearing abuts against the bottom end face of the pressing nut fixing hole, the valve seat bearing also supports the valve seat and the pressing nut sealing piece when being fixed, the bearing capacity of the valve seat bearing is greatly improved, and the high-pressure impact of 6000psig of air inlet air can be guaranteed to be borne for a long time.
The valve rod, the valve rod pin and the ejector rod are all made of 17-4PH materials, the valve seat is made of PCTFE, the diaphragm is made of Hastelloy-C22, the diaphragm sealing element, the pressing nut sealing element and the diaphragm sleeve are all made of PTFE materials, the handle and the handle gland are made of ABS materials, the die spring is made of spring steel, the elastic washer, the screw rod, the valve cover nut, the screw rod nut, the spring gland and the valve cover are all made of 304 stainless steel, and the lower seat, the upper seat, the pressing nut, the valve seat bearing seat, the valve rod spring and the pressure reducing valve body are all made of 316 stainless steel.
The operation principle of the invention is as follows:
the air inlet hole and the air outlet hole are respectively connected with an external air inlet pipeline and an external air outlet pipeline through internal threads, the handle is rotated, the screw rod is rotated by the handle, the screw rod is enabled to ascend and descend through the screw rod supporting threaded hole, two screw rod nuts can limit the descending stroke of the screw rod, when the screw rod descends, the screw rod top head pushes the spring pressing cover, the spring pressing cover pushes the upper seat of the diaphragm through the mold spring, the diaphragm is compressed downwards, the ejector rod is pushed downwards by the ejector column, the valve rod moves downwards, the semicircular head is separated from the upper end of the valve seat at the moment, air pressure enters the decompression cavity through the air inlet hole, the first vent hole, the valve rod cavity, the lower horn mouth, the bearing circular hole, the valve seat circular hole, the through hole and the horn-shaped air outlet, and the air inlet pressure can reach 6000 psig.
Finally, it should be noted that the above embodiments are merely representative examples of the present invention. It is obvious that the invention is not limited to the above-described embodiments, but that many variations are possible. Any simple modification, equivalent change and modification made to the above embodiments in accordance with the technical spirit of the present invention should be considered to be within the scope of the present invention.
Claims (7)
1. A diaphragm type pressure reducing valve capable of feeding high pressure and discharging low pressure comprises a pressure reducing valve body, a valve cap nut, a valve cap and a handle, and is characterized in that an air inlet hole is formed in the lower right side of the pressure reducing valve body, an air outlet hole is formed in the lower left side of the pressure reducing valve body, internal threads are formed in inner rings of the air inlet hole and the air outlet hole, a valve rod cavity is vertically arranged in the middle of the pressure reducing valve body, a valve rod pin positioning hole is formed in the center of the bottom of the valve rod cavity, the outer diameter of the valve rod pin positioning hole is smaller than the inner diameter of the valve rod cavity, a first vent hole is formed between the lower right side of the valve rod cavity and the air inlet hole, the valve rod cavity is communicated with the air inlet hole through the first vent hole, a pressure reducing cavity is formed in the upper end of the pressure reducing valve body, a pressing nut fixing hole is formed in the upper side, the upper end of the pressing nut sealing element is provided with a valve seat bearing, the upper end of the valve seat bearing is provided with a valve seat, the upper end of the valve seat is provided with a pressing nut, the outer side of the upper end part of the pressing nut is provided with a pressing ring, the pressing ring is positioned on the upper side of the bottom of the decompression cavity, the pressing nut and the pressing nut fixing hole are fixed through threads, the pressing nut sealing element, the valve seat bearing and the valve seat are all pressed on the lower side by the pressing nut, a valve rod is arranged in the valve rod cavity, the lower end of the valve rod is provided with a valve rod pin, the outer diameter of the valve rod pin is smaller than that of the valve rod, the lower end of the valve rod pin is arranged in a valve rod pin positioning hole, the valve rod pin and the valve rod pin positioning hole are in clearance fit, a valve rod spring is arranged on the outer ring of the valve rod pin, the center of sticising the nut sealing member is equipped with down the horn mouth, the opening of horn mouth is down, the center of disk seat bearing is equipped with the bearing round hole, the center of disk seat is equipped with the disk seat round hole, the lower tip of sticising the nut center is equipped with the through-hole, the upper end of sticising the nut center is equipped with loudspeaker form gas outlet, the opening of loudspeaker form gas outlet up, the lower opening and the through-hole of loudspeaker form gas outlet are connected, the upper end of valve rod is coniform, the upper end of valve rod is equipped with the ejector pin, the external diameter of ejector pin is less than the external diameter of valve rod, the lower tip of ejector pin is located in the through-hole, the internal diameter of through-hole is greater than the external diameter of ejector pin, the disk seat round hole is the same with the internal diameter of through-hole, the upper end of ejector pin is located, The inner diameters of the opening and the bearing circular hole are larger than the outer diameter of the upper end part of the valve rod, the upper end of the valve rod is arranged at the inner side of the valve seat circular hole, one side, close to the valve seat circular hole, of the lower end of the valve seat is provided with a semicircular head, the semicircular head is movably attached to the upper end part of the valve seat, an air outlet through hole is formed between the left side of the bottom part of the pressure reducing cavity and the air outlet hole, the outer side of the upper end part of the pressure reducing valve body is provided with external threads, a valve cover mounting ring platform is arranged on the outer ring surface of the upper end part of the pressure reducing valve body and is arranged at the upper side of the pressure reducing valve body, the valve cover is arranged at the upper side of the pressure reducing valve body, a valve cover mounting opening is formed at the lower end of the valve cover, the valve cover mounting opening is mounted, the spring pressing cover is in an inverted convex shape, the lower end part of the spring pressing cover is arranged in an inner ring at the upper end part of a die spring, a screw head positioning hole is arranged at the center of the upper end of the spring pressing cover, a screw supporting threaded hole is arranged at the center of the upper end of the valve cover, a second vent hole is arranged at the left lower side of the valve cover and is communicated with a valve cover cavity, a diaphragm pressing step is arranged at the lower side of the inner ring of the valve cover mounting opening and is in an inclined shape, a diaphragm upper seat limiting step is arranged at the upper side of the inner ring of the valve cover mounting opening, a diaphragm lower seat is arranged right above a pressing nut, a top post is arranged at the lower side of the center of the diaphragm lower seat and is arranged right above a top rod, a diaphragm supporting disc is arranged at the outer side of the lower end part of the diaphragm lower seat, the outer ring, the outer ring of the diaphragm sleeve is provided with a downward bent flanging, the upper side of the diaphragm sleeve is provided with a diaphragm, the outer ring edges of the diaphragm sleeve and the diaphragm extend to the outer side of the upper end of the pressure reducing valve body, the inner sides of the diaphragm sleeve and the diaphragm are abutted against the lower diaphragm seat, the upper side between the diaphragm and the lower diaphragm seat is provided with a diaphragm sealing element, the upper side of the lower diaphragm seat is provided with an upper diaphragm seat, the inner side of the upper diaphragm seat is fixedly connected with the outer side of the upper end part of the lower diaphragm seat through threads, the diaphragm and the diaphragm sleeve are fixed on the lower diaphragm seat by the upper diaphragm seat, the outer side of the lower end part of the upper diaphragm seat is provided with a diaphragm limiting disc, the inner side of the bottom of the diaphragm limiting disc and the outer side of the bottom of the diaphragm limiting disc are in an upward inclined shape, the upper diaphragm seat is arranged in the inner ring of the lower end part of the die spring, the upper side of the bonnet nut is provided with an internal compression ring, the bonnet nut is fixed between the pressure reducing valve body and the bonnet through external threads, the internal compression ring compresses a bonnet mounting opening into the bonnet nut, the diaphragm compression step is attached to the outer ring face of the upper end of the pressure reducing valve body, the outer ring edges of the diaphragm and the diaphragm sleeve are locked and fixed by the diaphragm compression step and the outer ring face of the upper end of the pressure reducing valve body, a screw is arranged in a screw supporting threaded hole, the lower end of the screw is arranged in a bonnet cavity, the lower end of the screw is provided with a screw top which is arranged in a screw head positioning hole, the middle of the screw is provided with two screw nuts, the upper end of the screw is arranged at the center of the handle, the upper end of the screw is provided with a locking nut, the lower side of the locking nut is provided with an elastic washer, and the locking nut, the lower end of the handle is in sliding connection with the outer side of the valve cover, and a handle gland is arranged in the center of the upper end of the handle.
2. The diaphragm pressure reducing valve according to claim 1, wherein the inclination of the outer surface of the upper end of the pressure reducing valve body is the same as that of the diaphragm pressing step.
3. The diaphragm pressure reducing valve for high pressure and low pressure as claimed in claim 1, wherein the outer diameter of the diaphragm is larger than that of the diaphragm sleeve.
4. The diaphragm pressure reducing valve for high pressure inlet and low pressure outlet according to claim 1, wherein the outer side of the diaphragm limiting disc is disposed below the diaphragm upper seat limiting step, and the outer diameter of the diaphragm limiting disc is smaller than the inner diameter of the diaphragm upper seat limiting step.
5. The diaphragm pressure reducing valve for high pressure and low pressure as claimed in claim 1, wherein the depth of the positioning hole of the valve stem pin is greater than the contraction degree of the valve stem spring.
6. The diaphragm pressure reducing valve with high pressure inlet and low pressure outlet according to claim 1, wherein a lower chamber is formed at a lower side of the valve seat, an upper chamber is formed at an upper side of the valve seat, the gland nut seal is arranged in the lower chamber, and the valve seat is arranged in the upper chamber.
7. The diaphragm type pressure reducing valve capable of feeding high pressure and discharging low pressure as claimed in claim 1, wherein the valve rod, the valve rod pin and the ejector rod are made of 17-4PH material, the valve seat is made of PCTFE material, the diaphragm is made of Hastelloy-C22 material, the diaphragm sealing element, the pressing nut sealing element and the diaphragm sleeve are made of PTFE material, the handle and the handle pressing cover are made of ABS material, the die spring is made of spring steel material, the elastic washer, the screw rod, the valve cover nut, the screw rod nut, the spring pressing cover and the valve cover are made of 304 stainless steel, and the lower diaphragm seat, the upper diaphragm seat, the pressing nut, the valve seat bearing, the valve rod spring and the pressure reducing valve body are made of 316 stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911334317.8A CN110848437A (en) | 2019-12-23 | 2019-12-23 | Diaphragm type pressure reducing valve capable of allowing high pressure to enter and low pressure to exit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911334317.8A CN110848437A (en) | 2019-12-23 | 2019-12-23 | Diaphragm type pressure reducing valve capable of allowing high pressure to enter and low pressure to exit |
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| Publication Number | Publication Date |
|---|---|
| CN110848437A true CN110848437A (en) | 2020-02-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911334317.8A Pending CN110848437A (en) | 2019-12-23 | 2019-12-23 | Diaphragm type pressure reducing valve capable of allowing high pressure to enter and low pressure to exit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112555429A (en) * | 2020-12-01 | 2021-03-26 | 上海空间推进研究所 | All-welded zero-leakage-rate pressure reducing valve |
| CN114658871A (en) * | 2022-02-18 | 2022-06-24 | 何婧 | Multistage sealing refrigeration valve |
-
2019
- 2019-12-23 CN CN201911334317.8A patent/CN110848437A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112555429A (en) * | 2020-12-01 | 2021-03-26 | 上海空间推进研究所 | All-welded zero-leakage-rate pressure reducing valve |
| CN114658871A (en) * | 2022-02-18 | 2022-06-24 | 何婧 | Multistage sealing refrigeration valve |
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