CN216131579U

CN216131579U - Interface leak-proof type negative pressure valve

Info

Publication number: CN216131579U
Application number: CN202121604156.2U
Authority: CN
Inventors: 严格; 欧吉林
Original assignee: Chongqing Xiangzhong Gas Equipment Co ltd
Current assignee: Chongqing Xiangzhong Gas Equipment Co ltd
Priority date: 2021-07-15
Filing date: 2021-07-15
Publication date: 2022-03-25
Anticipated expiration: 2031-07-15

Abstract

The application provides an interface leak protection type negative pressure valve belongs to valve technical field. The interface leak-proof negative pressure valve comprises a valve component, a leak-proof component and a fixed sealing component. The mounting and connecting base is connected above the valve body, the valve rod is in threaded connection above the connecting base, and the input pipe and the output pipe are respectively connected at two ends of the valve body. The joint spare is connected gu fixed ring's both ends, the connecting cover sets up the outside of input tube, the one end of input tube with the mutual joint of joint spare, communicating pipe is fixed to be cup jointed the outside of input tube, the second sealing washer is connected the input tube with between the limiting plate, the bracing piece is connected communicating pipe with between the limiting plate. The gas leakage prevention valve is beneficial to avoiding the pipe head connection part from being exposed in the air for a long time, improving the sealing property between the connecting pipe and the valve body, reducing the probability of gas leakage and reducing the potential safety hazard.

Description

Interface leak-proof type negative pressure valve

Technical Field

The application relates to the field of valves, in particular to an interface leakage-proof negative pressure valve.

Background

The negative pressure valve is a safety matching device for gas engineering in a gas pipeline, has good control characteristic and closing sealing performance, and is suitable for various gas medium pipelines such as city gas, liquefied petroleum gas, natural gas, oxygen and the like.

In the use process of the negative pressure valve, at present, the pipe head connection part leaks into the air for a long time, so that oxidation is generated along with the lapse of time, the sealing performance of the connection part is gradually reduced, the tight connection between the connection pipe and the valve body is difficult to ensure, the connection stability is poorer and poorer, the condition of gas leakage is easily caused, the reliability is reduced, and greater potential safety hazard exists.

SUMMERY OF THE UTILITY MODEL

In order to compensate for above not enough, the application provides an interface leak protection type negative pressure valve, aims at improving the pipe head junction and just leaks in the air for a long time, is difficult to guarantee the zonulae occludens of connecting pipe and valve body, leads to the stability of connecting more and more poor to cause the condition that the gas leaked easily, reduced the reliability, there is the problem of great potential safety hazard.

The embodiment of the application provides an interface leak protection type negative pressure valve, which comprises a valve component, a leak protection component and a fixed sealing component.

The valve component comprises a valve body, an installation connecting seat, a valve rod, an input pipe and an output pipe, the installation connecting seat is connected above the valve body, the valve rod is in threaded connection above the installation connecting seat, and the input pipe and the output pipe are respectively connected at two ends of the valve body.

The leak protection subassembly includes solid fixed ring, joint spare, connecting cover, communicating pipe, limiting plate, first sealing washer, second sealing washer and bracing piece, gu fixed cover of fixed ring connects the surface of input tube, joint spare is connected gu fixed ring's both ends, connecting cover sets up the outside of input tube, the one end of input tube with the mutual joint of joint spare, communicating pipe is fixed to be cup jointed the outside of input tube, communicating pipe sets up the inside of connecting cover, the limiting plate is fixed in the communicating pipe, the input tube with the limiting plate intercommunication, first sealing washer is connected communicating pipe with between the input tube, the second sealing washer is connected the input tube with between the limiting plate, the bracing piece is connected communicating pipe with between the limiting plate.

The fixed sealing assembly comprises a fixing piece and a connecting sealing piece, the fixing piece is in threaded connection with the connecting cover, one end of the fixing piece is in contact connection with the communicating pipe, and the connecting sealing piece is connected with the connecting cover and the communicating pipe.

In the aforesaid realization process, install suitable position with the valve body, through being connected the input tube with the pipeline of treating the connection, output tube connection is to the user end of gas, control the valve body through the valve rod, thereby realize controlling the flow of gas, fixed cup joint is in the outside of input tube communicating pipe, connect between communicating pipe and input tube through first sealing washer, the second sealing washer is connected between input tube and limiting plate, thereby be favorable to preventing that the gas from taking place to leak between input tube and communicating pipe, be favorable to further improving the leakproofness between the two, the joint spare leads to and is connected with the connecting cover, thereby realized solid fixed ring and connected cover and be connected and fixed, the connecting cover protects input tube and communicating pipe. Remove through rotating the mounting for the mounting contacts with communicating pipe, is favorable to fixing communicating pipe, thereby realizes connecting cover and communicating pipe and fixes, sets up to connect the sealing member and is favorable to further improving the leakproofness between connecting cover and the communicating pipe, through the multilayer protection, has avoided the naked hourglass of tube head junction in the air promptly, has also improved the compactness and the leakproofness of connecting. The gas leakage prevention valve is beneficial to avoiding the pipe head connection part from being exposed in the air for a long time, improving the sealing property between the connecting pipe and the valve body, reducing the probability of gas leakage and reducing the potential safety hazard.

In a specific embodiment, the mounting-connecting base includes a first connecting plate fixed above the valve body and a second connecting plate connected above the first connecting plate.

In the implementation process, the connection strength of the valve body is improved by arranging the first connecting plate and the second connecting plate, and the first connecting plate and the second connecting plate are connected with each other to improve the sealing property of the valve body.

In a specific embodiment, a threaded sleeve is connected above the second connecting plate, and the valve rod is screwed in the threaded sleeve.

In the implementation process, the threaded sleeve is arranged to be beneficial to rotating the valve rod, so that the valve rod can be better matched with the valve body.

In a specific embodiment, the joint piece includes dead lever and fixture block, the dead lever is connected the both ends of solid fixed ring, the fixture block with the dead lever is connected, the draw-in groove has been seted up on the connecting cover, the fixture block joint is in the draw-in groove.

In the implementation process, the fixture block is connected with the connecting cover through the clamping groove, so that the fixing ring and the connecting cover are connected and fixed.

In a specific embodiment, a connecting hole is formed in the limiting plate, the input pipe is communicated with the connecting hole, a first sealing gasket is arranged between the input pipe and the limiting plate, and the first sealing gasket is arranged in the connecting hole.

In the implementation process, the connection hole is formed to be beneficial to the communication between the input pipe and the limiting plate, and the first sealing gasket is arranged to be beneficial to the sealing performance between the input pipe and the limiting plate.

In a specific embodiment, the bracing piece includes the body of rod and spring, the body of rod is connected communicating pipe with between the limiting plate, the spring winding is in on the body of rod.

In the above-mentioned realization process, set up the body of rod and be favorable to providing the support to the limiting plate, be favorable to improving the stability of limiting plate at the intercommunication intraductal connection, set up the spring and can provide the buffering, be favorable to reducing the impact that the gas flow caused the limiting plate.

In a specific embodiment, the mounting includes threaded rod and briquetting, the threaded rod with threaded connection between the connection cover, the briquetting is fixed the one end of threaded rod, the briquetting with communicating pipe contact connection.

In the implementation process, the pressing block is driven to move by rotating the threaded rod, so that the pressing block is in contact with the communicating pipe, and the communicating pipe is favorably fixed.

In a specific embodiment, a threaded block is connected to the connecting cover, and the threaded rod is in threaded connection with the threaded block.

In the implementation process, the threaded block is arranged to realize threaded connection between the threaded rod and the connecting cover, so that the threaded rod is favorably rotated.

In a specific embodiment, a second sealing gasket is arranged between the connecting cover and the communicating pipe, and the second sealing gasket is arranged in the connecting cover.

In the implementation process, the second sealing gasket is arranged to improve the sealing performance between the connecting cover and the communicating pipe, and the leakage of gas between the connecting cover and the communicating pipe is avoided.

In a specific embodiment, the connection sealing member includes a housing and a sealing plug, the housing is connected to one end of the exterior of the connection cover, the communication pipe penetrates through the housing, and the sealing plug is disposed between the housing, the communication pipe and the connection cover.

In the implementation process, the arrangement of the housing and the sealing plug is favorable for further improving the sealing performance between the connecting cover and the communicating pipe, and through multilayer protection, the tube head connecting part is prevented from being exposed in the air, and the connecting tightness and the connecting sealing performance are also improved.

Drawings

In order to more clearly explain the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that for those skilled in the art, other related drawings can be obtained from these drawings without inventive effort.

FIG. 1 is a schematic structural view of an interface leak-proof negative pressure valve provided by an embodiment of the present application;

FIG. 2 is a schematic view of a valve assembly according to an embodiment of the present disclosure;

FIG. 3 is a schematic view of a leak-proof assembly and a stationary seal assembly provided in accordance with an embodiment of the present disclosure;

fig. 4 is a schematic view of a connection structure of the input pipe and the limiting plate according to the embodiment of the present application.

In the figure: 100-a valve assembly; 110-a valve body; 120-installing a connecting seat; 122 — a first connection plate; 124-a second connecting plate; 130-a threaded sleeve; 140-a valve stem; 150-an input tube; 160-an output pipe; 200-a leak-proof assembly; 210-a fixed ring; 220-a clip; 222-a fixing bar; 224-a cartridge; 230-a connection cover; 232-card slot; 240-communicating pipe; 250-a limiting plate; 252-connecting hole; 254-a first gasket; 260-a first sealing ring; 270-a second seal ring; 280-support rods; 282-a rod body; 284-a spring; 300-securing a seal assembly; 310-a fixture; 312-a threaded block; 314-a threaded rod; 316-briquetting; 320-a second gasket; 330-connecting a seal; 332-a housing; 334-sealing plug.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

To make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application.

Thus, the following detailed description of the embodiments of the present application, as presented in the figures, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and thus should not be considered limiting.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Referring to fig. 1-4, the present application provides a technical solution: an interface leak-proof negative pressure valve includes a valve assembly 100, a leak-proof assembly 200, and a stationary seal assembly 300.

Referring to fig. 1-4, the valve assembly 100 includes a valve body 110, a mounting seat 120, a stem 140, an inlet pipe 150 and an outlet pipe 160, the mounting seat 120 is connected above the valve body 110, the stem 140 is screwed above the mounting seat 120, the mounting seat 120 includes a first connecting plate 122 and a second connecting plate 124, the first connecting plate 122 is fixed above the valve body 110, and the second connecting plate 124 is connected above the first connecting plate 122. The first connecting plate 122 and the second connecting plate 124 are arranged to improve the connection strength of the valve body 110, and the first connecting plate 122 and the second connecting plate 124 are connected with each other to improve the sealing performance of the valve body 110. A threaded sleeve 130 is connected to the upper portion of the second connecting plate 124, and a valve stem 140 is screwed into the threaded sleeve 130. The threaded sleeve 130 is provided to facilitate rotation of the stem 140 to better engage the valve body 110, and the input pipe 150 and the output pipe 160 are connected to opposite ends of the valve body 110.

Referring to fig. 1-4, the leakage preventing assembly 200 includes a fixing ring 210, a clamping member 220, a connecting cover 230, a communicating pipe 240, a limiting plate 250, a first sealing ring 260, a second sealing ring 270 and a supporting rod 280, the fixing ring 210 is fixedly sleeved on the outer surface of the input pipe 150, the clamping member 220 is connected to two ends of the fixing ring 210, the connecting cover 230 is disposed outside the input pipe 150, one end of the input pipe 150 is clamped with the clamping member 220, the clamping member 220 includes a fixing rod 222 and a clamping block 224, the fixing rod 222 is connected to two ends of the fixing ring 210, the clamping block 224 is connected with the fixing rod 222, the connecting cover 230 is provided with a clamping groove 232, and the clamping block 224 is clamped in the clamping groove 232. The latch 224 is connected with the connecting cover 230 through the latch groove 232, so that the fixing ring 210 is connected and fixed with the connecting cover 230. The communication pipe 240 is fixedly sleeved outside the input pipe 150 and connected with the input pipe 150 in a welding mode, the communication pipe 240 is arranged inside the connection cover 230, the limit plate 250 is fixed in the communication pipe 240, the input pipe 150 is communicated with the limit plate 250, the limit plate 250 is provided with a connection hole 252, the input pipe 150 is communicated with the connection hole 252, a first sealing gasket 254 is arranged between the input pipe 150 and the limit plate 250, and the first sealing gasket 254 is arranged in the connection hole 252. The connection hole 252 is formed to facilitate communication between the input pipe 150 and the limiting plate 250, and the first sealing gasket 254 is formed to facilitate sealing between the input pipe 150 and the limiting plate 250. The first packing 260 is connected between the connection pipe 240 and the input pipe 150, the second packing 270 is connected between the input pipe 150 and the stopper plate 250, and the support rod 280 is connected between the connection pipe 240 and the stopper plate 250. The support bar 280 includes a rod 282 and a spring 284, the rod 282 is connected between the connection pipe 240 and the stopper plate 250, and the spring 284 is wound around the rod 282. Set up the body of rod 282 and be favorable to providing the support to limiting plate 250, be favorable to improving the stability of limiting plate 250 at communicating pipe 240 internal connection, set up spring 284 and can provide the buffering, be favorable to reducing the impact that the gas flow caused limiting plate 250.

Referring to fig. 1 to 4, the fixed sealing assembly 300 includes a fixed member 310 and a connection sealing member 330, the fixed member 310 is in threaded connection with the connection cover 230, one end of the fixed member 310 is in contact connection with the connection pipe 240, the fixed member 310 includes a threaded rod 314 and a pressing block 316, the threaded rod 314 is in threaded connection with the connection cover 230, the pressing block 316 is fixed at one end of the threaded rod 314, and the pressing block 316 is in contact connection with the connection pipe 240. The pressing block 316 is driven to move by rotating the threaded rod 314, so that the pressing block 316 is in contact with the communicating pipe 240, and the communicating pipe 240 is favorably fixed. The connecting cover 230 is connected with a thread block 312, and the thread rod 314 is in threaded connection with the thread block 312. The threaded block 312 is provided to enable the threaded rod 314 to be threadedly coupled to the connection cap 230, thereby facilitating rotation of the threaded rod 314. A second packing 320 is disposed between connection cover 230 and communication pipe 240, and second packing 320 is disposed inside connection cover 230. The second gasket 320 is provided to improve the sealing performance between the connection cover 230 and the communication pipe 240, and to prevent the gas from leaking between the connection cover 230 and the communication pipe 240. Connection packing 330 is connected between connection cover 230 and communication pipe 240, connection packing 330 includes a housing 332 and a sealing plug 334, housing 332 is connected to one end of the outside of connection cover 230, communication pipe 240 penetrates housing 332, and sealing plug 334 is provided between housing 332, communication pipe 240, and connection cover 230. The provision of the cover 332 and the sealing plug 334 is advantageous for further improving the sealing performance between the connection cover 230 and the communication pipe 240, and by means of multi-layer protection, the tube head connection is prevented from being exposed to the air, and the tightness and sealing performance of the connection are also improved.

The working principle of the interface leak-proof negative pressure valve is as follows: during the use, install suitable position with valve body 110, through being connected input tube 150 with the pipeline of treating being connected, output tube 160 is connected to the user end of gas, controls valve body 110 through valve rod 140, thereby the realization is controlled the flow of gas, communicating pipe 240 is fixed to be cup jointed in the outside of input tube 150, is favorable to input tube 150 and limiting plate 250 intercommunication through seting up the connecting hole 252, set up the leakproofness that first sealed pad 254 is favorable to being connected between input tube 150 and the limiting plate 250. Connect between communicating pipe 240 and input tube 150 through first sealing washer 260, second sealing washer 270 is connected between input tube 150 and limiting plate 250, thereby be favorable to preventing that the gas from taking place to leak between input tube 150 and communicating pipe 240, be favorable to further improving the leakproofness between the two, fixture block 224 is connected through draw-in groove 232 and connection cover 230, thereby realized solid fixed ring 210 and connected cover 230 and be connected and fixed, connection cover 230 protects input tube 150 and communicating pipe 240. The pressing block 316 is driven to move by rotating the threaded rod 314, so that the pressing block 316 is in contact with the communicating pipe 240, fixing of the communicating pipe 240 is facilitated, fixing of the connecting cover 230 and the communicating pipe 240 is achieved, the second sealing gasket 320 is arranged, sealing performance between the connecting cover 230 and the communicating pipe 240 is facilitated to be improved, and leakage of gas between the connecting cover 230 and the communicating pipe 240 is facilitated to be avoided. The provision of the cover 332 and the sealing plug 334 is advantageous for further improving the sealing performance between the connection cover 230 and the communication pipe 240, and by means of multi-layer protection, the tube head connection is prevented from being exposed to the air, and the tightness and sealing performance of the connection are also improved. The problem of the pipe head junction is naked to leak in the air for a long time, be difficult to guarantee the zonulae occludens of connecting pipe and valve body 110, lead to the stability of connecting to be more and more poor to cause the condition that the gas leaked easily, reduced the reliability, have great potential safety hazard is solved.

The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A negative pressure valve with leak-proof interface is characterized by comprising

The valve assembly (100) comprises a valve body (110), an installation connecting seat (120), a valve rod (140), an input pipe (150) and an output pipe (160), wherein the installation connecting seat (120) is connected above the valve body (110), the valve rod (140) is in threaded connection above the installation connecting seat (120), and the input pipe (150) and the output pipe (160) are respectively connected to two ends of the valve body (110);

leak protection subassembly (200), leak protection subassembly (200) is including solid fixed ring (210), joint spare (220), connecting cover (230), communicating pipe (240), limiting plate (250), first sealing washer (260), second sealing washer (270) and bracing piece (280), gu fixed ring (210) is fixed to be cup jointed the surface of input tube (150), joint spare (220) are connected at the both ends of solid fixed ring (210), connecting cover (230) sets up the outside of input tube (150), the one end of input tube (150) with joint spare (220) joint each other, communicating pipe (240) are fixed to be cup jointed the outside of input tube (150), communicating pipe (240) set up the inside of connecting cover (230), limiting plate (250) are fixed in communicating pipe (240), input tube (150) with limiting plate (250) intercommunication, the first sealing ring (260) is connected between the communication pipe (240) and the input pipe (150), the second sealing ring (270) is connected between the input pipe (150) and the limiting plate (250), and the supporting rod (280) is connected between the communication pipe (240) and the limiting plate (250);

the fixed seal assembly (300) comprises a fixing piece (310) and a connecting sealing piece (330), the fixing piece (310) is in threaded connection with the connecting cover (230), one end of the fixing piece (310) is in contact connection with the communicating pipe (240), and the connecting sealing piece (330) is connected between the connecting cover (230) and the communicating pipe (240).

2. An interface leak-proof negative pressure valve according to claim 1, characterized in that the mounting and connecting seat (120) comprises a first connecting plate (122) and a second connecting plate (124), the first connecting plate (122) is fixed above the valve body (110), and the second connecting plate (124) is connected above the first connecting plate (122).

3. An interface leak-proof type negative pressure valve according to claim 2, wherein a threaded sleeve (130) is connected to the upper portion of the second connecting plate (124), and the valve stem (140) is screwed into the threaded sleeve (130).

4. The interface leakage-proof negative pressure valve as claimed in claim 1, wherein the clamping member (220) comprises a fixing rod (222) and a clamping block (224), the fixing rod (222) is connected to both ends of the fixing ring (210), the clamping block (224) is connected to the fixing rod (222), the connecting cover (230) is provided with a clamping groove (232), and the clamping block (224) is clamped in the clamping groove (232).

5. The interface leakage-proof negative pressure valve as claimed in claim 1, wherein the limiting plate (250) is provided with a connecting hole (252), the input pipe (150) is communicated with the connecting hole (252), a first sealing gasket (254) is arranged between the input pipe (150) and the limiting plate (250), and the first sealing gasket (254) is arranged in the connecting hole (252).

6. An interface leak-proof negative pressure valve according to claim 1, characterized in that the supporting rod (280) comprises a rod body (282) and a spring (284), the rod body (282) is connected between the communicating pipe (240) and the limiting plate (250), and the spring (284) is wound on the rod body (282).

7. The interface leakage-proof negative pressure valve as claimed in claim 1, wherein the fixing member (310) comprises a threaded rod (314) and a pressing block (316), the threaded rod (314) is in threaded connection with the connection cover (230), the pressing block (316) is fixed at one end of the threaded rod (314), and the pressing block (316) is in contact connection with the communication pipe (240).

8. An interface leak-proof negative pressure valve according to claim 7, characterized in that a threaded block (312) is connected to the connection cover (230), and the threaded rod (314) is in threaded connection with the threaded block (312).

9. An interface leak-proof type negative pressure valve according to claim 1, characterized in that a second gasket (320) is disposed between said connection cover (230) and said communicating pipe (240), said second gasket (320) being disposed inside said connection cover (230).

10. An interface leak-proof negative pressure valve according to claim 1, wherein the connection sealing member (330) comprises a casing (332) and a sealing plug (334), the casing (332) is connected to one end of the outside of the connection cover (230), the communication pipe (240) penetrates through the casing (332), and the sealing plug (334) is arranged between the casing (332), the communication pipe (240) and the connection cover (230).