CN117419182A - High-pressure pneumatic valve and fluid control system - Google Patents
High-pressure pneumatic valve and fluid control system Download PDFInfo
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- CN117419182A CN117419182A CN202311737472.0A CN202311737472A CN117419182A CN 117419182 A CN117419182 A CN 117419182A CN 202311737472 A CN202311737472 A CN 202311737472A CN 117419182 A CN117419182 A CN 117419182A
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- valve
- blocking
- assembly
- sealing ring
- valve seat
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- 238000007789 sealing Methods 0.000 claims abstract description 119
- 230000000903 blocking effect Effects 0.000 claims abstract description 49
- 239000000463 material Substances 0.000 claims abstract description 17
- 239000000428 dust Substances 0.000 claims description 14
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 239000004642 Polyimide Substances 0.000 claims description 4
- 229910002804 graphite Inorganic materials 0.000 claims description 4
- 239000010439 graphite Substances 0.000 claims description 4
- 229920001721 polyimide Polymers 0.000 claims description 4
- 239000004814 polyurethane Substances 0.000 claims description 4
- 229920002635 polyurethane Polymers 0.000 claims description 4
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- 239000007789 gas Substances 0.000 description 28
- 238000013461 design Methods 0.000 description 14
- 229910052755 nonmetal Inorganic materials 0.000 description 12
- 238000000034 method Methods 0.000 description 11
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- 229910052734 helium Inorganic materials 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
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Classifications
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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
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/04—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only 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
- 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
-
- 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
- F16K1/36—Valve members
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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
-
- 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
- F16K27/0263—Construction of housing; Use of materials therefor of lift valves multiple way valves
-
- 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
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
Abstract
The invention discloses a high-pressure pneumatic valve and a fluid control system, relates to the technical field of gas valves, and can solve the problems that the high-pressure pneumatic valve in the existing gas automatic control system cannot be suitable for the gas pressure above 72Mpa and has insufficient sealing performance. The embodiment of the invention provides a high-pressure pneumatic valve, which comprises: the valve body assembly and the valve seat assembly are provided with a valve rod main body for blocking a gas flow passage in the valve seat assembly, and the valve rod main body penetrates through the valve body assembly and the valve seat assembly; the valve seat assembly includes: the valve seat comprises a valve seat body with a gas flow passage and a blocking slope, and a blocking sealing ring positioned at the blocking position of the gas flow passage, wherein the blocking sealing ring is provided with a blocking slope matched with the valve rod body for blocking the gas flow passage, the blocking sealing ring is embedded and fixed in the blocking slope of the valve seat body, and the blocking slope of the blocking sealing ring protrudes outwards from the blocking slope; the plugging sealing ring is made of an elastic nonmetallic material.
Description
Technical Field
The invention relates to the technical field of pneumatic valves, in particular to a high-pressure pneumatic valve and a fluid control system.
Background
The pneumatic stop valve is a pneumatic actuating mechanism commonly used under the fluid working condition, and the pneumatic stop valve has the characteristics of simple structure, convenient maintenance, good sealing performance, small friction force between sealing surfaces, long service life and the like by taking compressed air as a power source of the valve, and is a commonly used valve in fluid control.
Patent number: 202211446669.4, patent name: the technical scheme disclosed by the technical scheme is that the pneumatic high-pressure valve is unreasonable in structural layout design, and can only cut off and control the high-pressure gas of about 40Mpa at most, so that the pneumatic high-pressure valve is difficult to adapt to gas flow switch control of 72Mpa and above, and is difficult to adapt to occasions with special requirements on sealing performance, and the sealing structure can achieve helium leakage rate of 1 x 10 < -6 > mbar/L/Min. Under high-strength gas punching, the operation is not stable enough, and the requirements of various performance indexes such as tightness, service life and the like are difficult to meet.
Based on the above background, the inventors devised a high-pressure pneumatic valve and a fluid control system that can solve one or more of the above problems, and thus, the present application was specifically directed.
Disclosure of Invention
The purpose of the application is to provide a high-pressure pneumatic valve and a fluid control system, which are used for solving the problems that the high-pressure pneumatic valve in the current gas automatic control system cannot be suitable for the gas pressure above 72Mpa and the sealing performance is insufficient.
In order to solve the technical problems, the invention adopts the following scheme:
one aspect of the present application provides a high pressure pneumatic valve comprising:
the valve body assembly and the valve seat assembly are used for plugging a gas flow passage in the valve seat assembly, and the valve rod body penetrates through the valve body assembly and the valve seat assembly and can repeatedly move along the axis of the valve rod body;
the valve seat assembly includes: the valve seat comprises a valve seat body with a gas flow passage and a blocking slope, and a blocking sealing ring positioned at the blocking position of the gas flow passage, wherein the blocking sealing ring is provided with a blocking slope matched with the valve rod body for blocking the gas flow passage, the blocking sealing ring is embedded and fixed in the blocking slope of the valve seat body, and the blocking slope of the blocking sealing ring protrudes outwards from the blocking slope;
the plugging sealing ring is made of an elastic nonmetallic material.
The design concept of the application is as follows: through embedding at the shutoff slope of disk seat main part and establishing fixed nonmetal sealing washer, utilize the shutoff sealing washer have certain elastic nonmetal material and valve rod main part to shutoff the gas runner of disk seat main part, two metal surfaces for original valve rod main part and disk seat main part are sealed, have replaced the shutoff seal of metal surface and having elastic nonmetal surface, can order about the shutoff inclined plane of shutoff sealing washer to produce certain elastic deformation at the shutoff in-process, improve shutoff sealing effect, solve present high-pressure pneumatic valve and can not be applicable to the problem that atmospheric pressure more than 72Mpa and sealing performance are not enough.
Under the technical route of the design concept of the application, some preferred schemes are as follows:
preferably, the method further comprises:
the valve cover assembly and the plurality of mounting bolts are used for locking the valve cover assembly, the valve body assembly and the valve seat assembly into a whole, are distributed along the circumferential direction of the valve rod main body and are arranged parallel to the valve rod main body;
the valve body assembly comprises a first valve body and a second valve body, and the valve seat assembly is positioned between the first valve body and the second valve body in a coating manner;
the valve seat assembly comprises a first valve cover and a second valve cover, and the first valve cover and the second valve cover are respectively positioned at two sides of the first valve body and the second valve body;
the valve rod main body sequentially penetrates through the first valve cover, the first valve body, the valve cover assembly, the second valve body and the second valve cover;
the mounting bolts sequentially penetrate through the first valve cover, the first valve body, the second valve body and the second valve cover and lock the valve cover assembly between the first valve body and the second valve body.
Preferably, further comprising a sliding bushing assembly for supporting the valve stem body, the sliding bushing assembly comprising:
a first sliding bush located between the first valve body and the first valve cover, and a second sliding bush located between the second valve body and the second valve cover, the valve stem body being slidably connected to the first sliding bush and the second sliding bush in an axial direction thereof;
the first sliding bush and the second sliding bush both comprise a nonmetallic bearing sleeved on the valve rod main body and in sliding connection with the valve rod main body, and a bearing seat for installing the nonmetallic bearing.
Preferably, still include the cover locate valve rod main part on and rather than sliding connection's high-pressure seal ring subassembly, high-pressure seal ring subassembly includes:
a first high pressure seal ring positioned between the first valve body and the first valve cover, and a second high pressure seal ring positioned between the second valve body and the second valve cover;
the first high-pressure sealing ring, the plugging sealing ring and the second high-pressure sealing ring which are distributed in sequence form a three-layer sealing structure aiming at the valve rod main body;
the nonmetallic bearings of the first sliding bush and the second sliding bush and the plugging sealing ring are made of compression-resistant materials formed by polyimide and graphite;
the first high-pressure sealing ring and the second high-pressure sealing ring are made of polyurethane materials.
Preferably, the first valve body is provided with a plurality of air inlets arranged along the radial direction of the valve rod main body, and the second valve body is provided with a plurality of air outlets arranged along the radial direction of the valve rod main body;
the air inlet and the air outlet are communicated through an air flow passage of the valve seat assembly.
Preferably, the air inlet comprises a first air inlet and a second air inlet which are oppositely arranged on the first valve body, and an air inlet buffer cavity is arranged between the first air inlet and the second air inlet;
the air outlet comprises a first air outlet and a second air outlet which are oppositely arranged on the second valve body, and an air outlet buffer cavity is arranged between the first air outlet and the second air outlet;
the air inlet buffer cavity and the air outlet buffer cavity are respectively positioned at two sides of the valve seat assembly and are communicated with the air flow passage of the valve seat assembly.
Preferably, the air inlet buffer cavity and the air outlet buffer cavity are both cylindrical structures;
an air inlet slow slope is arranged between the air inlet buffer cavity and the air flow channel of the valve seat assembly;
an air outlet slow slope is arranged between the air outlet buffer cavity and the air flow channel of the valve seat assembly.
Preferably, the plugging sealing ring is embedded and fixed on the valve seat main body and then needs to be subjected to rolling treatment;
the valve seat main body is provided with a sealing step for installing a sealing gasket and a valve seat sealing ring;
the dust-proof ring assembly is sleeved on the valve rod main body and embedded on the valve cover assembly;
the dust ring assembly comprises a first dust ring embedded in the first valve cover and a second dust ring embedded on the second valve cover.
Preferably, the valve rod main body comprises a first connecting structure, a first sliding section, a connecting section, a plugging section, a limiting section, a second sliding section and a second connecting structure which are integrally formed and distributed in sequence;
the plugging section is provided with a plugging conical surface which is matched with the shape of the plugging inclined surface of the plugging sealing ring;
the shape of the plugging inclined plane and the plugging conical surface are conical;
and a plurality of annular sealing bulges are further arranged on the plugging inclined plane of the plugging sealing ring.
Another aspect of the present application provides: a fluid control system comprising a high pressure pneumatic valve as described in any one of the above, further comprising a drive cylinder for driving the valve stem body away from the valve seat assembly in the axial direction thereof, and a reset cylinder for driving the valve stem body to reset and block the gas flow passage;
the reset cylinder and the driving cylinder are detachably connected with two ends of the valve rod main body respectively.
The invention has the beneficial effects that:
the advantage of this application on the one hand is through setting up fixed nonmetal sealing washer in the shutoff slope of disk seat main part, utilize shutoff sealing washer to have certain elastic nonmetal material and valve rod main part to shutoff the gas runner of disk seat main part, it is sealed with two metal faces of disk seat main part for original valve rod main part, it is sealed with the shutoff that has elastic nonmetal face to have replaced the metal face, can order about the shutoff inclined plane of shutoff sealing washer at the shutoff in-process and produce certain elastic deformation, improve shutoff sealing effect, solve present high-pressure pneumatic valve and can not be applicable to the problem that atmospheric pressure more than 72Mpa and sealing performance are not enough.
The advantage of the other aspect of the application is that the parts of the whole valve body are subjected to the repeated layout design, so that a layered structure design of sequentially distributing the first valve cover, the first sliding bush, the first valve body, the valve seat, the second valve body, the second sliding bush and the second valve cover and a through structure design of sequentially penetrating the parts by the valve rod main body are formed, the stress of the valve rod is more stable, the valve rod has a plurality of fulcrums in the actual use process, the operation is more stable, the sealing performance is better, and the service life is longer; in addition, on the basis of the layered structure design and the through structure design, the three-layer sealing structure formed by the first high-pressure sealing ring, the plugging sealing ring and the second high-pressure sealing ring and the material with compression resistance adopted at the special sealing position of the three-layer sealing structure can further improve the sealing performance in the opening and closing process and the running process of the valve.
On the basis of the layered structure design and the through structure design, the first valve body and the second valve body are provided with the plurality of air inlets and the plurality of air outlets, the multipath air flow channels can be rapidly controlled, the multipath air flow channels can be flexibly adjusted under the condition of plugging or opening the plurality of air inlets and the plurality of air outlets, the single-inlet single-outlet, single-inlet multiple-outlet, multiple-inlet single-outlet or multiple-inlet multiple-outlet effects are formed, and the single valve can realize single-path or multipath control of air.
Drawings
Fig. 1 is a schematic perspective view of embodiment 1 of the present application;
FIG. 2 is a schematic cross-sectional view of embodiment 1 of the present application;
FIG. 3 is a schematic diagram showing a front view of a valve stem according to embodiment 1 of the present application;
FIG. 4 is a schematic cross-sectional view of a valve seat assembly of example 1 of the present application;
fig. 5 is a schematic cross-sectional structure of embodiment 2 of the present application.
Reference numerals illustrate:
11-first valve body, 111-first air inlet, 112-second air inlet, 113-air inlet buffer chamber, 114-air inlet gentle slope, 12-second valve body, 121-first air outlet, 122-second air outlet, 123-air outlet buffer chamber, 124-air outlet gentle slope, 21-first valve cover, 22-second valve cover, 3-valve stem body, 31-first sliding section, 32-second sliding section, 33-connecting section, 34-blocking section, 341-blocking conical surface, 35-limiting section, 36-first connecting structure, 37-second connecting structure, 4-mounting bolt, 51-valve seat body, 511-gas flow channel, 512-sealing step, 52-blocking sealing ring, 521-blocking slope, 522-sealing protrusion, 53-valve seat sealing ring, 61-first sliding bush, 62-second sliding bush, 71-first high-pressure sealing ring, 72-second high-pressure sealing ring, 81-first dust ring, 82-second dust ring, 91-driving cylinder, 92-reset cylinder.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but embodiments of the present invention are not limited thereto.
In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "rear", "top", "bottom", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present invention and for simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "configured," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The invention is described in detail below with reference to the drawings in combination with embodiments.
Example 1:
as shown in fig. 1 to 4, the present embodiment provides a high-pressure pneumatic valve, including:
a valve body assembly and a valve seat assembly, and a valve stem body 3 for blocking a gas flow passage 511 in the valve seat assembly, the valve stem body 3 being provided through the valve body assembly and the valve seat assembly and being repeatedly movable along an axis thereof;
the valve seat assembly includes: the valve seat comprises a valve seat body 51 with a gas flow passage 511 and a blocking slope, and a blocking sealing ring 52 positioned at the blocking position of the gas flow passage 511, wherein the blocking sealing ring 52 is provided with a blocking slope 521 matched with the valve rod body 3 to block the gas flow passage 511, the blocking sealing ring 52 is embedded and fixed in the blocking slope of the valve seat body 51, and the blocking slope 521 of the blocking sealing ring 52 protrudes outwards from the blocking slope;
the sealing ring 52 is made of non-metal material with elasticity.
The design concept of the application is as follows: through embedding fixed nonmetal sealing washer in the shutoff slope of disk seat main part 51, utilize shutoff sealing washer 52 to have the nonmetal material of certain elasticity and valve rod main part 3 to shutoff the gas runner 511 of disk seat main part 51, for original valve rod main part 3 and two metal surfaces of disk seat main part 51 are sealed, replaced the shutoff seal of metal surface and having elastic nonmetal surface, can order about the shutoff inclined plane 521 of shutoff sealing washer 52 to produce certain elastic deformation in the shutoff in-process, improve shutoff sealing effect, solve present high-pressure pneumatic valve and can not be applicable to the problem that atmospheric pressure more than 72Mpa and sealing performance are not enough.
Under the technical route of the design concept of the application, some preferred schemes are as follows:
in some preferred embodiments, further comprising:
the valve cover assembly and the plurality of mounting bolts 4 are used for locking the valve cover assembly, the valve body assembly and the valve seat assembly into a whole, and the mounting bolts 4 are distributed along the circumferential direction of the valve rod main body 3 and are arranged parallel to the valve rod main body 3;
the valve body assembly comprises a first valve body 11 and a second valve body 12, and the valve seat assembly is arranged between the first valve body 11 and the second valve body 12 in a coating manner;
the valve seat assembly comprises a first valve cover 21 and a second valve cover 22, and the first valve cover 21 and the second valve cover 22 are respectively positioned on two sides of the first valve body 11 and the second valve body 12;
the first valve cover 21, the first valve body 11, the second valve body 12 and the second valve cover 22 are sequentially distributed in a layered manner, and the valve rod main body 3 sequentially penetrates through the first valve cover 21, the first valve body 11, the valve cover assembly, the second valve body 12 and the second valve cover 22;
a plurality of mounting bolts 4 sequentially penetrate through the first valve cover 21, the first valve body 11, the second valve body 12 and the second valve cover 22 and lock the valve cover assembly between the first valve body 11 and the second valve body 12.
As shown in fig. 2, the valve body assembly in this embodiment includes a first valve body 11 and a second valve body 12, and the valve cover assembly includes a first valve cover 21 and a second valve cover 22, and is locked and fixed by the mounting bolts 4, so that the overall layout of the valve body is reasonable, and parts of the valve body can be conveniently disassembled and assembled, so that gaskets, sealing rings and other parts can be conveniently replaced, and the valve is convenient to maintain; meanwhile, the valve seat assembly is covered in the concave gaps of the first valve body 11 and the second valve body 12, so that the valve rod main body 3 can keep stable positions and ensure stable sealing performance of the valve bodies in the process of moving along the axis of the valve rod main body.
In this embodiment, the number of the mounting bolts 4 is four, and the four mounting bolts 4 are uniformly distributed along the circumferential direction of the valve rod main body 3, as shown in fig. 1, in this embodiment, the first valve body 11 and the second valve body 12 are both in a cube structure, and the four mounting bolts 4 are disposed at four corners of the valve body assembly, and in some embodiments, the valve body assembly may also be in other shapes such as a cylinder, which will not be described herein.
In some preferred embodiments, as shown in fig. 2, further comprising a sliding bushing assembly for supporting the valve stem body 3, the sliding bushing assembly comprising:
a first sliding bush 61 located between the first valve body 11 and the first bonnet 21, and a second sliding bush 62 located between the second valve body 12 and the second bonnet 22, the valve stem body 3 being slidably connected to the first sliding bush 61 and the second sliding bush 62 in the axial direction thereof; the first sliding bush 61 and the second sliding bush 62 each include a non-metal bearing fitted over the valve stem body 3 and slidably connected thereto, and a bearing housing for mounting the non-metal bearing. Through setting up first slip bush 61 and second slip bush 62, valve rod main part 3 can be supported by first slip bush 61 and second slip bush 62 simultaneously for valve rod main part 3 is at the in-process of reciprocating sliding along its axis, and the axiality of valve rod main part 3 is better, more laminating with the disk seat main part 51 of disk seat subassembly, and the operation is more steady, sealing performance is better, and life is longer.
In some preferred embodiments, the high-pressure sealing ring assembly is sleeved on the valve rod main body 3 and is slidably connected with the valve rod main body, and the high-pressure sealing ring assembly comprises:
a first high-pressure seal ring 71 located between the first valve body 11 and the first bonnet 21, and a second high-pressure seal ring 72 located between the second valve body 12 and the second bonnet 22;
the first high-pressure sealing ring 71, the plugging sealing ring 52 and the second high-pressure sealing ring 72 which are distributed in sequence form a three-layer sealing structure for the valve rod main body 3;
the nonmetallic bearings of the first sliding bush 61 and the second sliding bush 62 and the plugging sealing ring 52 are made of compression-resistant materials formed by polyimide and graphite;
the first high-pressure sealing ring 71 and the second high-pressure sealing ring 72 are made of polyurethane, the compression-resistant material formed by polyimide and graphite is an existing material, and the polyurethane is also an existing material, which is not described herein. In this embodiment, on the basis of the layered structure design and the through-type structure design, the three-layer sealing structure formed by the first high-pressure sealing ring 71, the plugging sealing ring 52 and the second high-pressure sealing ring 72, and the material with compression resistance used at the special sealing position of the three-layer sealing structure can further improve the tightness in the opening and closing processes of the valve.
In some preferred embodiments, the first valve body 11 is provided with a plurality of air inlets arranged along the radial direction of the valve rod body 3, and the second valve body 12 is provided with a plurality of air outlets arranged along the radial direction of the valve rod body 3;
the inlet and outlet ports communicate through a gas flow passage 511 of the valve seat assembly. The multiple air inlets and the multiple air outlets are arranged, so that the flow of multiple paths of air can be controlled.
Specifically, in this embodiment, as shown in fig. 2, the air inlet includes a first air inlet 111 and a second air inlet 112 that are oppositely disposed on the first valve body 11, and an air inlet buffer chamber 113 is disposed between the first air inlet 111 and the second air inlet 112;
the air outlet comprises a first air outlet 121 and a second air outlet 122 which are oppositely arranged on the second valve body 12, and an air outlet buffer cavity 123 is arranged between the first air outlet 121 and the second air outlet 122;
the inlet buffer chamber 113 and the outlet buffer chamber 123 are respectively located at both sides of the valve seat assembly and communicate with the gas flow passage 511 of the valve seat assembly. The first valve body 11 and the second valve body 12 are provided with a plurality of air inlets and air outlets, so that the multipath air flow channels 511 can be rapidly controlled, and the flow of multipath air can be flexibly regulated under the condition of plugging or opening a plurality of air inlets and air outlets, so that the effects of single inlet, single outlet, single inlet, multiple outlet, multiple inlet, single outlet or multiple inlet and multiple outlet are formed, and the single valve can realize the single path or multipath control of the air.
It can be understood that, in the actual use process, the second air inlet 112 and the second air outlet 122 are directly plugged, so that the valve in this embodiment can control the air entering and exiting the first air inlet 111 and the first air outlet 121 to form the air channel control of single inlet and single outlet, and only plug the second air outlet 122, form the air channel control of double inlet and single outlet, only plug the second air inlet 112, form the air channel control of single inlet and double outlet, and not plug the air inlet of the first valve body 11 and the air outlet of the second valve body 12, and form the air channel control of double inlet and double outlet. In some embodiments, more air inlets may be formed in the first valve body 11, and more air outlets may be formed in the second valve body 12, which will not be described herein.
In some preferred embodiments, the inlet buffer chamber 113 and the outlet buffer chamber 123 are each cylindrical in structure;
an air inlet slow slope surface 114 is arranged between the air inlet buffer cavity 113 and the air flow passage 511 of the valve seat assembly;
an air outlet slow slope 124 is provided between the air outlet buffer chamber 123 and the air flow passage 511 of the valve seat assembly. In this embodiment, by providing the cylindrical air inlet buffer cavity 113 and the air outlet buffer cavity 123, the air inlet buffer surface 114 and the air outlet buffer surface 124 can be further and gently buffered when the high-pressure air flows into or out of the air flow channel 511 of the valve seat main body 51, so as to avoid abrupt change of internal pressure and ensure valve performance and service life, and in this embodiment, the air inlet buffer surface 114 and the air outlet buffer surface 124 are both conical inclined surfaces with gradually enlarged or reduced cross sections.
In some preferred embodiments, as shown in fig. 2, the plugging sealing ring 52 is embedded and fixed on the valve seat main body 51 and then needs to be rolled;
the valve seat main body 51 is provided with a sealing step 512 for installing a sealing gasket and a valve seat sealing ring 53;
the valve rod is sleeved on the valve rod main body 3, and the valve cover is embedded on the valve cover assembly;
the dust ring assembly includes a first dust ring 81 embedded in the first valve cover 21 and a second dust ring 82 embedded in the second valve cover 22. Through setting up first dust ring 81 and second dust ring 82, can avoid outside air in the dust enter into the valve body inside, influence performance and life-span, as shown in fig. 2 and 4, the sealing step 512 that sets up in this embodiment can be above that suit sealing washer and disk seat sealing washer 53, after mounting bolt 4 locks first valve body 11 and second valve body 12 and fixes, avoid gas to leak in the gap of first valve body 11 and second valve body 12, and because disk seat sealing washer 53 is after the valve is installed, can not produce relative slip between first valve body 11, second valve body 12 and the disk seat main part 51, therefore, its material adopts conventional polytetrafluoroethylene can.
In some preferred embodiments, as shown in fig. 3, the valve stem body 3 includes a first connecting structure 36, a first sliding section 31, a connecting section 33, a plugging section 34, a limiting section 35, a second sliding section 32, and a second connecting structure 37 that are integrally formed and sequentially distributed;
the plugging section 34 has a plugging conical surface 341 which is matched with the shape of the plugging inclined surface 521 of the plugging sealing ring 52;
the shape of the plugging inclined plane 521 and the plugging conical plane 341 are conical;
as shown in fig. 4, the sealing inclined surface 521 of the sealing ring 52 is further provided with a plurality of annular sealing protrusions 522, in this embodiment, the sealing protrusions 522 are provided with three layers, and in the case of high sealing requirements of the application object being noble gas or toxic and harmful gas, the sealing protrusions 522 can further improve the sealing performance of the valve. The shape of the sealing protrusion 522 may be triangular, semicircular, etc.
In this embodiment, the diameter of the connecting section 33 is smaller than the diameters of the first sliding section 31 and the second sliding section 32, so that enough gas circulation space can be reserved under the open state of the valve, and in addition, the first connecting structure 36 and the second connecting structure 37 in this embodiment have the same shape and can be detachably connected with the pneumatic driving structure for driving the valve rod main body 3 into a whole, thereby realizing transmission of pulling force or pushing force, controlling movement of the valve rod main body 3, and further realizing opening and closing control of the gas flow passage 511 in this embodiment.
In this embodiment, the diameter of the limiting section 35 is larger than the diameters of the first sliding section 31 and the second sliding section 32, and the limiting section 35 is located in the air outlet buffer chamber 123 between the first air outlet 121 and the second air outlet 122.
Example 2:
as shown in fig. 5, on the basis of the above embodiment 1, another aspect of the present application provides: a fluid control system comprising a high pressure pneumatic valve as claimed in any one of the preceding claims, further comprising a drive cylinder 91 for driving the valve stem body 3 away from the valve seat assembly in the axial direction thereof, and a reset cylinder 92 for driving the valve stem body 3 to reset the plugging gas flow passage 511;
the reset cylinder 92 and the driving cylinder 91 are detachably connected to both ends of the valve stem body 3, respectively.
The reset cylinder 92 and the driving cylinder 91 in this embodiment are common pneumatic driving mechanisms in the prior art, and are not described herein, and the reset cylinder 92 in this embodiment is detachably connected to the first connecting structure 36 of the valve rod main body 3, and the driving cylinder 91 is detachably connected to the second connecting structure 37 of the valve rod main body 3. The reset cylinder 92 and the driving cylinder 91 can drive the valve rod main body 3 to repeatedly move along the axial direction of the valve rod main body, so that the blocking section 34 of the valve rod main body 3 can block the gas flow passage 511, or the blocking section 34 is far away from the valve seat main body 51, the opening of the gas flow passage 511 is completed, and the opening and closing control of the gas flow passage 511 is realized.
The other structures of this embodiment are the same as those of embodiment 1, and are not described here again.
It is to be understood that the above embodiments are merely illustrative of the application of the principles of the present invention, but not in limitation thereof. Various modifications and improvements may be made by those skilled in the art without departing from the spirit and substance of the invention, and are also considered to be within the scope of the invention.
Claims (10)
1. A high pressure pneumatic valve comprising:
the valve body assembly and the valve seat assembly are provided with a valve rod main body (3) for blocking a gas flow passage (511) in the valve seat assembly, and the valve rod main body (3) penetrates through the valve body assembly and the valve seat assembly and can repeatedly move along the axis of the valve rod main body;
the valve seat assembly includes: the valve seat comprises a valve seat body (51) with a gas flow passage (511) and a blocking slope, and a blocking sealing ring (52) positioned at the blocking position of the gas flow passage (511), wherein the blocking sealing ring (52) is provided with a blocking slope (521) matched with the valve rod body (3) to block the gas flow passage (511), the blocking sealing ring (52) is embedded and fixed in the blocking slope of the valve seat body (51), and the blocking slope (521) of the blocking sealing ring (52) protrudes outwards from the blocking slope;
the plugging sealing ring (52) is made of an elastic nonmetallic material.
2. The high pressure pneumatic valve of claim 1, further comprising:
the valve cover assembly and the plurality of mounting bolts (4) are used for locking the valve cover assembly, the valve body assembly and the valve seat assembly into a whole, and the mounting bolts (4) are distributed along the circumferential direction of the valve rod main body (3) and are arranged parallel to the valve rod main body (3);
the valve body assembly comprises a first valve body (11) and a second valve body (12), and the valve seat assembly is arranged between the first valve body (11) and the second valve body (12);
the valve seat assembly comprises a first valve cover (21) and a second valve cover (22), and the first valve cover (21) and the second valve cover (22) are respectively positioned at two sides of the first valve body (11) and the second valve body (12);
the first valve cover (21), the first valve body (11), the second valve body (12) and the second valve cover (22) are sequentially distributed in a layered mode, and the valve rod main body (3) sequentially penetrates through the first valve cover (21), the first valve body (11), the valve cover assembly, the second valve body (12) and the second valve cover (22);
a plurality of mounting bolts (4) sequentially penetrate through the first valve cover (21), the first valve body (11), the second valve body (12) and the second valve cover (22) and lock the valve cover assembly between the first valve body (11) and the second valve body (12).
3. A high pressure pneumatic valve as claimed in claim 2, further comprising a sliding bush assembly for supporting the valve stem body (3), the sliding bush assembly comprising:
a first sliding bush (61) located between the first valve body (11) and the first valve cap (21), and a second sliding bush (62) located between the second valve body (12) and the second valve cap (22), the valve stem body (3) being slidably connected to the first sliding bush (61) and the second sliding bush (62) in the axial direction thereof;
the first sliding bush (61) and the second sliding bush (62) comprise nonmetallic bearings sleeved on the valve rod main body (3) and connected with the nonmetallic bearings in a sliding mode, and bearing seats used for installing the nonmetallic bearings.
4. A high pressure pneumatic valve as claimed in claim 3, further comprising a high pressure seal ring assembly disposed over and slidably connected to the valve stem body (3), the high pressure seal ring assembly comprising:
a first high pressure seal (71) between the first valve body (11) and the first valve cap (21), and a second high pressure seal (72) between the second valve body (12) and the second valve cap (22);
the first high-pressure sealing ring (71), the plugging sealing ring (52) and the second high-pressure sealing ring (72) which are distributed in sequence form a three-layer sealing structure aiming at the valve rod main body (3);
the nonmetallic bearings of the first sliding bush (61) and the second sliding bush (62) and the plugging sealing ring (52) are made of compression-resistant materials formed by polyimide and graphite;
the first high-pressure sealing ring (71) and the second high-pressure sealing ring (72) are made of polyurethane materials.
5. A high-pressure pneumatic valve as claimed in claim 2, wherein the first valve body (11) is provided with a plurality of air inlets arranged along the radial direction of the valve rod main body (3), and the second valve body (12) is provided with a plurality of air outlets arranged along the radial direction of the valve rod main body (3);
the inlet and outlet are in communication through a gas flow passage (511) of the valve seat assembly.
6. A high-pressure pneumatic valve as claimed in claim 5, wherein the air inlet comprises a first air inlet (111) and a second air inlet (112) which are oppositely arranged on the first valve body (11), and an air inlet buffer cavity (113) is arranged between the first air inlet (111) and the second air inlet (112);
the air outlet comprises a first air outlet (121) and a second air outlet (122) which are oppositely arranged on the second valve body (12), and an air outlet buffer cavity (123) is arranged between the first air outlet (121) and the second air outlet (122);
the air inlet buffer cavity (113) and the air outlet buffer cavity (123) are respectively positioned at two sides of the valve seat assembly and are communicated with the air flow passage (511) of the valve seat assembly.
7. A high-pressure pneumatic valve as claimed in claim 6, wherein the inlet buffer chamber (113) and the outlet buffer chamber (123) are each of cylindrical configuration;
an air inlet slow slope (114) is arranged between the air inlet buffer cavity (113) and the air flow passage (511) of the valve seat assembly;
an air outlet slow slope (124) is arranged between the air outlet buffer cavity (123) and the air flow passage (511) of the valve seat assembly.
8. A high-pressure pneumatic valve according to claim 2, wherein the sealing ring (52) is embedded and fixed on the valve seat main body (51) and then needs to be rolled;
a sealing step (512) for installing a sealing gasket and a valve seat sealing ring (53) is arranged on the valve seat main body (51);
the valve rod is sleeved on the valve rod main body (3) and is embedded on the valve cover assembly;
the dust ring assembly comprises a first dust ring (81) embedded in the first valve cover (21) and a second dust ring (82) embedded on the second valve cover (22).
9. A high-pressure pneumatic valve according to claim 1, wherein the valve stem body (3) comprises a first connecting structure (36), a first sliding section (31), a connecting section (33), a blocking section (34), a limiting section (35), a second sliding section (32) and a second connecting structure (37) which are integrally formed and distributed in sequence;
the plugging section (34) is provided with a plugging conical surface (341) which is matched with the shape of a plugging inclined surface (521) of the plugging sealing ring (52);
the shape of the plugging inclined plane (521) and the shape of the plugging conical surface (341) are conical;
a plurality of annular sealing bulges (522) are also arranged on the sealing inclined plane (521) of the sealing ring (52).
10. A fluid control system comprising a high pressure pneumatic valve as claimed in any one of claims 1 to 9, further comprising a drive cylinder (91) for driving the valve stem body (3) away from the valve seat assembly in the axial direction thereof, and a reset cylinder (92) for driving the valve stem body (3) to reset the blocking gas flow passage (511);
the reset cylinder (92) and the driving cylinder (91) are respectively detachably connected with two ends of the valve rod main body (3).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311737472.0A CN117419182B (en) | 2023-12-18 | 2023-12-18 | High-pressure pneumatic valve and fluid control system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311737472.0A CN117419182B (en) | 2023-12-18 | 2023-12-18 | High-pressure pneumatic valve and fluid control system |
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| CN117419182B CN117419182B (en) | 2024-03-01 |
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| CN117419182B (en) | 2024-03-01 |
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