CN115614520A

CN115614520A - Automatic bleeding valve

Info

Publication number: CN115614520A
Application number: CN202211631222.4A
Authority: CN
Inventors: 陆奇娜; 夏慧云; 戚志成; 陆洪良; 郭明琴
Original assignee: Changzhou Lucheng Gas Equipment Co ltd
Current assignee: Changzhou Lucheng Gas Equipment Co ltd
Priority date: 2022-12-19
Filing date: 2022-12-19
Publication date: 2023-01-17
Anticipated expiration: 2042-12-19
Also published as: CN115614520B

Abstract

The invention relates to the technical field of valves, in particular to an automatic bleeding valve which comprises a valve body, a valve cover and a diaphragm, wherein a first air cavity is formed between the diaphragm and the inner wall of the valve body; a first diffusion assembly is arranged in the valve body and comprises a pressing plate, a gasket, a compression spring, a first valve rod, a fixing plate and a valve core cover; the first valve rod is internally provided with a second air cavity in a through mode along the axis, a second diffusing assembly is arranged in the second air cavity and comprises a second valve rod, an inner lining pipe, a fixing piece, a jacking spring and a valve core pad. The invention can adjust the diffusing and pressure releasing sequence of the two diffusing components by adjusting the spring force of the pressing spring, and the cooperation of the first diffusing component and the second diffusing component enables the diffusing valve to be simultaneously suitable for low-medium pressure or medium-high pressure pipelines, thereby greatly improving the pressure early warning range and the applicability of a single diffusing valve.

Description

Automatic bleeding valve

Technical Field

The invention relates to the technical field of valves, in particular to an automatic bleeding valve.

Background

The relief valve is a safety early warning device for conveying combustible explosive gas by pipelines, and when the pressure of a control point exceeds a set value due to a certain temporary reason, a certain amount of gas is discharged.

Current valve of diffusing often diffuses the pressure release process through inside single structure of diffusing when using to the deformation volume through changing inside spring adjusts pressure early warning value, but the pressure early warning scope that the structure of diffusing can be adjusted is limited, this just leads to single valve of diffusing can only be applicable to the low pressure that corresponds, middling pressure or high-pressure pipeline, simultaneously because single structure of diffusing's the pressure release speed of diffusing is limited, current valve of diffusing is difficult to deal with the proruption situation that fluid pressure suddenly increases well in the pipeline.

Disclosure of Invention

The invention aims to provide an automatic bleeding valve, and aims to solve the technical problem.

The purpose of the invention can be realized by the following technical scheme:

an automatic bleeding valve comprises a valve body, a valve cover and a diaphragm, wherein a first air cavity is formed between the diaphragm and the inner wall of the valve body, an air inlet pipe is arranged at one side of the valve body, an air outlet pipe is arranged at the bottom of the valve body, and the air inlet pipe and the air outlet pipe are respectively communicated with the first air cavity;

the valve body is internally provided with a first diffusion assembly, the first diffusion assembly comprises a pressing plate, a gasket, a compression spring, a first valve rod, a fixed plate and a valve core cover, the bottom of the gasket is abutted against the center of the upper end of the diaphragm, the pressing plate is arranged in the valve cover, the pressing plate is connected with the valve cover through the compression spring, the first valve rod is fixedly connected to the bottom of the gasket, the fixed plate is fixedly sleeved on the outer side of the first valve rod, a plurality of vent holes are formed in the fixed plate in a penetrating mode, the valve core cover is connected with the first valve rod and is pressed against the upper end of the air outlet pipe to form a sealing structure, and the first valve rod sequentially penetrates through the first air cavity, the fixed plate and the valve core cover along the central axis direction of the air outlet pipe and extends into the air outlet pipe;

the valve core gasket is fixedly connected with the bottom of the second valve rod, and the valve core gasket is pressed against the bottom end of the second air cavity to form a sealing structure.

As a further scheme of the invention: a plurality of through holes are uniformly formed in the outer side of the first valve rod, and the first air cavity is communicated with the second air cavity through the through holes.

As a further scheme of the invention: the outer side of the first valve rod is connected with a supporting plate, and the supporting plate is attached to the bottom of the diaphragm.

As a further scheme of the invention: the first air cavity is internally provided with a slide cavity, and the fixing plate is mounted in the slide cavity in an adaptive manner.

As a further scheme of the invention: and an adjusting bolt penetrates through the top thread of the valve cover, and the bottom of the adjusting bolt is in running fit with the upper end of the pressing plate.

As a further scheme of the invention: the valve core cover comprises a valve core seat and a cover body, the cover body is fixedly connected to the bottom of the valve core seat, the valve core seat is pressed against the upper end of the air outlet pipe, and the cover body and the edge of the pipe orifice of the air outlet pipe form conical surface sealing.

As a further scheme of the invention: the valve core gasket and the cavity opening at the bottom of the second air cavity form conical surface sealing.

As a further scheme of the invention: the valve body is connected with the valve cover through a fastening screw.

The invention has the beneficial effects that:

(1) According to the invention, the second diffusing component is designed in the first valve rod, and the first air cavity is communicated with the second air cavity, so that fluid pressure acts on the first diffusing component and the second diffusing component simultaneously, the first diffusing component and the second diffusing component operate independently and respectively have independent pressure diffusing critical values, the diffusing and pressure releasing sequence of the two diffusing components can be adjusted by adjusting the spring force of the compression spring, and the diffusion valve can be simultaneously suitable for low-medium pressure pipelines or medium-high pressure pipelines due to the cooperation of the first diffusing component and the second diffusing component, so that the pressure early warning range and the applicability of a single diffusion valve are greatly improved, and the two diffusing components can simultaneously diffuse and release pressure when the gas pressure is suddenly increased, so that the pressure releasing speed is effectively improved, and the diffusing safety is improved;

(2) According to the invention, through the matching of the fixing plate and the slide way cavity, the fixing plate can always keep sliding up and down in the slide way cavity in the process of moving along with the first valve rod, so that the up-and-down moving process of the first valve rod can be limited, the first valve rod can always move along the central axis direction of the air outlet pipe, and the accuracy of automatic return of the valve core cover is further ensured.

Drawings

The invention will be further described with reference to the accompanying drawings.

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 isbase:Sub>A schematic cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is a schematic view showing the internal structure of the valve body according to the present invention;

FIG. 4 is an exploded view of the structure of the present invention;

FIG. 5 is a schematic view of the construction of the first valve stem of the present invention;

FIG. 6 is a schematic diagram of a second diffusion assembly of the present invention.

In the figure: 1. a valve body; 101. a first air cavity; 102. a slideway cavity; 2. a valve cover; 3. a membrane; 4. an air inlet pipe; 5. an air outlet pipe; 6. a first dissipating assembly; 61. pressing a plate; 62. a gasket; 63. a compression spring; 64. a first valve stem; 641. a second air cavity; 642. a through hole; 643. a support plate; 65. a fixing plate; 651. a vent hole; 66. a valve element cover; 661. a valve core seat; 662. a cover body; 67. adjusting the bolt; 7. a second dissipating component; 71. a second valve stem; 72. a liner tube; 721. air holes are formed; 73. a fixing sheet; 74. a jacking spring; 75. and a valve core gasket.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 and 2, the present invention is an automatic bleeding valve, including a valve body 1, a valve cover 2 and a diaphragm 3, a first air chamber 101 is formed between the diaphragm 3 and the inner wall of the valve body 1, an air inlet pipe 4 is arranged on one side of the valve body 1, an air outlet pipe 5 is arranged at the bottom of the valve body 1, and the air inlet pipe 4 and the air outlet pipe 5 are respectively communicated with the first air chamber 101.

As shown in fig. 3 and 4, a first diffusing component 6 is arranged inside the valve body 1, the first diffusing component 6 includes a pressing plate 61, a gasket 62, a compression spring 63, a first valve rod 64, a fixing plate 65 and a valve core cover 66, the bottom of the gasket 62 abuts against the center of the upper end of the diaphragm 3, the pressing plate 61 is arranged inside the valve cover 2, the pressing plate 61 and the valve cover 2 are connected through the compression spring 63, the first valve rod 64 is fixedly connected to the bottom of the gasket 62, the fixing plate 65 is fixedly sleeved outside the first valve rod 64, a plurality of vent holes 651 are arranged on the fixing plate 65 in a penetrating manner, the valve core cover 66 is connected with the first valve rod 64 and is pressed against the upper end of the air outlet pipe 5 to form a sealing structure, and the first valve rod 64 sequentially penetrates through the first air cavity 101, the fixing plate 65 and the valve core cover 66 along the central axis direction of the air outlet pipe 5 and extends into the air outlet pipe 5.

As shown in fig. 5 and 6, a second air cavity 641 is disposed inside the first valve rod 64 along the axis, wherein a plurality of through holes 642 are uniformly disposed outside the first valve rod 64, and the first air cavity 101 is communicated with the second air cavity 641 through the through holes 642. The second air cavity 641 is internally provided with a second diffusing assembly 7, the second diffusing assembly 7 comprises a second valve rod 71, a lining pipe 72, a fixing piece 73, a jacking spring 74 and a valve core pad 75, the lining pipe 72 is connected with the inner wall of the first valve rod 64, the second valve rod 71 penetrates through the lining pipe 72 along the central axis direction of the first valve rod 64, a plurality of air holes 721 are formed in the lining pipe 72, the top of the second valve rod 71 is fixedly connected with the fixing piece 73, the fixing piece 73 is connected with the lining pipe 72 through the jacking spring 74, the bottom of the second valve rod 71 is fixedly connected with the valve core pad 75, and the valve core pad 75 is pressed against the bottom of the second air cavity 641 to form a sealing structure.

Through the technical scheme, when the first air cavity 101 has no fluid pressure, the pressure plate 61 pushes the compression spring 63 to deform, so that the acting force of the compression spring 63 acts on the gasket 62 and the diaphragm 3, at the moment, the first valve rod 64 bears downward pressure, the valve core cover 66 is driven to abut against the upper end face of the air outlet pipe 5, sealing is formed between the valve core cover 66 and the air outlet pipe 5, meanwhile, the lifting spring 74 pushes the fixing piece 73 upwards, the fixing piece 73 pulls the second valve rod 71 upwards, and the second valve rod 71 drives the valve core gasket 75 to press against the bottom of the first valve rod 64 to form sealing;

when gas is introduced into the first air cavity 101 through the gas inlet pipe 4, the fluid pressure in the first air cavity 101 gradually increases, the gas in the first air cavity 101 acts on the diaphragm 3 through the vent hole 651, so that the diaphragm 3 generates an upward acting force, the gasket 62 drives the first valve rod 64 to have a tendency of moving upward, at this time, the sealing force of the valve core cover 66 gradually decreases, as the first air cavity 101 is communicated with the second air cavity 641, the gas enters the second air cavity 641 through the through hole 642, the gas acts on the valve core gasket 75 through the vent hole 721, so that the valve core gasket 75 has a tendency of pulling the second valve rod 71 downward, and at this time, the sealing force of the valve core gasket 75 gradually decreases;

when the fluid pressure in the first air cavity 101 increases to be greater than the acting force generated by the pressing spring 63, that is, the air pressure exceeds the pressure relief critical value of the first relief assembly 6, at this time, the air pressure in the first air cavity 101 will push the gasket 62 and the first valve rod 64 to move upwards through the diaphragm 3, the valve core cover 66 is separated from the air outlet pipe 5, the first air cavity 101 is communicated with the air outlet pipe 5, and the air in the first air cavity 101 will be relieved and relieved through the air outlet pipe 5, similarly, when the fluid pressure in the first air cavity 101 increases to be greater than the acting force generated by the jacking spring 74, that is, the air pressure exceeds the pressure relief critical value of the second relief assembly 7, at this time, the air pressure will push the valve core pad 75 downwards, so that the valve core pad 75 pulls the second valve rod 71 downwards, the fixing plate 73 will push the jacking spring 74 at this time, the valve core pad 75 is separated from the first valve rod 64, the second air cavity 641 is communicated with the air outlet pipe 5, and the air is relieved and relieved through the second air cavity 641.

Since the fluid pressure acts on the first dissipating assembly 6 and the second dissipating assembly 7 at the same time, the dissipating and pressure-releasing sequence of the first dissipating assembly 6 and the second dissipating assembly 7 depends on the magnitude of the spring forces of the pressing spring 63 and the jacking spring 74. The jacking spring 74 is arranged inside the first valve rod 64 and is fixed during assembly so as not to be convenient to adjust, while the spring force of the pressing spring 63 can be adjusted by the adjusting bolt 67 at the top. When the set compression spring 63 is larger than the spring force of the jacking spring 74, the pressure relief critical value of the first relief assembly 6 is higher than the pressure relief critical value of the second relief assembly 7, the gas in the valve body 1 is firstly relieved and decompressed through the second relief assembly 7, and when the pressure is increased to the pressure relief critical value of the first relief assembly 6, the first relief assembly 6 is used for relief and decompression; on the contrary, when the set compression spring 63 is smaller than the spring force of the jacking spring 74, the pressure relief critical value of the first relief assembly 6 is lower than the pressure relief critical value of the second relief assembly 7, the gas in the valve body 1 is firstly relieved and decompressed through the first relief assembly 6, and when the pressure is increased to the pressure relief critical value of the second relief assembly 7, the gas is then relieved and decompressed through the second relief assembly 7; when the spring force of the set pressing spring 63 is equal to the jacking spring 74 and the fluid pressure reaches the pressure relief critical value, the internal gas will be simultaneously released and decompressed through the first and second releasing

assemblies

6 and 7.

When the fluid pressure is relieved and falls below the pressure relief threshold, the hold-down spring 63 or the lift-up spring 74 will automatically reset and the spool cover 66 or the spool gasket 75 will reseal closed.

Further, a support plate 643 is connected to the outer side of the first valve rod 64, and the support plate 643 abuts against the bottom of the diaphragm 3. The supporting plate 643 can support the membrane 3 and drive the membrane 3 to move integrally, so as to protect the membrane 3.

Further, a slide way cavity 102 is arranged inside the first air cavity 101, and the fixing plate 65 is fittingly installed in the slide way cavity 102. The fixed plate 65 can move along with the movement of the first valve rod 64, and in the process of moving, the fixed plate 65 always slides up and down in the slide way cavity 102, so that the up-and-down moving process of the first valve rod 64 can be limited, the first valve rod 64 can be guaranteed to move along the central axis direction of the air outlet pipe 5 all the time, and the accuracy of the automatic return of the valve core cover 66 is further ensured.

Furthermore, an adjusting bolt 67 penetrates through the top thread of the valve cover 2, and the bottom of the adjusting bolt 67 is in running fit with the upper end of the pressure plate 61. The pressing plate 61 is driven to move up and down by rotating the adjusting bolt 67, so that the spring force of the pressing spring 63 can be adjusted, and the pressure diffusion critical value of the first diffusion assembly 6 is adjusted.

Further, the valve core cover 66 includes a valve core seat 661 and a cover body 662, the cover body 662 is fixedly connected to the bottom of the valve core seat 661, the valve core seat 661 is pressed against the upper end of the air outlet pipe 5, and the cover body 662 and the edge of the pipe opening of the air outlet pipe 5 form a conical surface seal. The sealing performance of the cover body 662 can be effectively improved by adopting conical surface sealing between the cover body 662 and the air outlet pipe 5.

Further, the valve core gasket 75 and the opening at the bottom of the second air cavity 641 form a conical surface seal, and the sealing effect of the valve core gasket 75 can be effectively improved by adopting the conical surface seal between the valve core gasket 75 and the second air cavity 641.

Further, the valve body 1 and the valve cover 2 are connected through fastening screws.

The working principle of the invention is as follows: when the pressure relief valve is used, the spring force of the pressing spring 63 is adjusted through the adjusting bolt 67, when the adjusting pressing spring 63 is larger than the spring force of the jacking spring 74, the pressure relief critical value of the first relief assembly 6 is higher than the pressure relief critical value of the second relief assembly 7, gas is introduced into the first air cavity 101, the fluid pressure is gradually increased, the sealing force between the valve core cover 66 and the valve core pad 75 is gradually reduced, when the fluid pressure is increased to be larger than the spring force of the jacking spring 74, the air pressure pushes the valve core pad 75 downwards at the moment, the valve core pad 75 pulls the second valve rod 71 downwards, the fixing plate 73 presses the jacking spring 74 at the moment, the valve core pad 75 is separated from the first valve rod 64, the second air cavity 641 is communicated with the air outlet pipe 5, the gas is relieved and relieved through the second air cavity 641, and when the fluid pressure is continuously increased to the pressure relief critical value of the first relief assembly 6, and the first relief assembly 6 is relieved at the same time; when the pressure spring 63 is set to be smaller than the spring force of the jacking spring 74, the pressure relief critical value of the first relief assembly 6 is lower than the pressure relief critical value of the second relief assembly 7, when the fluid pressure is increased to be larger than the spring force of the pressure spring 63, the air pressure pushes the first valve rod 64 upwards, the valve core cover 66 is separated from the air outlet pipe 5, the air is relieved and relieved through the air outlet pipe 5, and when the fluid pressure is continuously increased to the pressure relief critical value of the second relief assembly 7, the relief and relief are simultaneously carried out through the second relief assembly 7; when the spring force of the set pressing spring 63 is equal to the jacking spring 74 and the fluid pressure reaches the pressure relief critical value, the internal gas will be simultaneously released and decompressed through the first and second bleeding assemblies 6 and 7.

While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention and should not be taken as limiting the scope of the invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.

Claims

1. An automatic bleeding valve comprises a valve body (1), a valve cover (2) and a diaphragm (3), and is characterized in that a first air cavity (101) is formed between the diaphragm (3) and the inner wall of the valve body (1), an air inlet pipe (4) is arranged on one side of the valve body (1), an air outlet pipe (5) is arranged at the bottom of the valve body (1), and the air inlet pipe (4) and the air outlet pipe (5) are respectively communicated with the first air cavity (101);

a first diffusing assembly (6) is arranged inside the valve body (1), the first diffusing assembly (6) comprises a pressing plate (61), a gasket (62), a compression spring (63), a first valve rod (64), a fixing plate (65) and a valve core cover (66), the bottom of the gasket (62) is abutted against the center of the upper end of the diaphragm (3), the pressing plate (61) is arranged in the valve cover (2), the pressing plate (61) is connected with the valve cover (2) through the compression spring (63), the first valve rod (64) is fixedly connected to the bottom of the gasket (62), the fixing plate (65) is fixedly sleeved on the outer side of the first valve rod (64), a plurality of vent holes (651) are formed in the fixing plate (65), the valve core cover (66) is connected with the first valve rod (64) and is pressed on the upper end of the air outlet pipe (5) to form a sealing structure, and the first valve rod (64) sequentially penetrates through the first air cavity (101), the fixing plate (65) and the valve core cover (66) and extends into the air outlet pipe (5) along the central axis direction;

the valve core structure is characterized in that a second air cavity (641) penetrates through the interior of the first valve rod (64) along the axis, a second diffusing assembly (7) is arranged in the second air cavity (641), the second diffusing assembly (7) comprises a second valve rod (71), a lining pipe (72), a fixing piece (73), a jacking spring (74) and a valve core pad (75), the lining pipe (72) is connected with the inner wall of the first valve rod (64), the second valve rod (71) penetrates through the lining pipe (72) along the central axis direction of the first valve rod (64), a plurality of air holes (721) penetrate through the lining pipe (72), the top of the second valve rod (71) is fixedly connected with the fixing piece (73), the fixing piece (73) is connected with the lining pipe (72) through the jacking spring (74), the bottom of the second valve rod (71) is fixedly connected with the valve core pad (75), and the valve core pad (75) is pressed against the bottom end of the second air cavity (641) to form a sealing structure.

2. The automatic bleeding valve according to claim 1, wherein a plurality of through holes (642) are uniformly formed in the outer side of the first valve rod (64), and the first air chamber (101) is communicated with the second air chamber (641) through the through holes (642).

3. An automatic bleeding valve according to claim 2, characterised in that a support plate (643) is attached to the outside of the first valve stem (64), the support plate (643) resting against the bottom of the membrane (3).

4. An automatic bleeding valve according to claim 3, characterised in that the first air chamber (101) is internally provided with a slide chamber (102), the fixing plate (65) being fitted inside the slide chamber (102).

5. The automatic bleeding valve according to claim 4, wherein the top of the valve cover (2) is threaded with an adjusting bolt (67), and the bottom of the adjusting bolt (67) is rotatably matched with the upper end of the pressure plate (61).

6. The automatic bleeding valve according to claim 1, wherein the valve core cover (66) comprises a valve core seat (661) and a cover body (662), the cover body (662) is fixedly connected to the bottom of the valve core seat (661), the valve core seat (661) is pressed against the upper end of the air outlet pipe (5), and the cover body (662) forms a conical surface seal with the edge of the opening of the air outlet pipe (5).

7. The automatic bleeding valve of claim 6, wherein said spool gasket (75) forms a conical seal with the bottom port of the second air chamber (641).

8. An automatic bleeding valve according to claim 1, characterised in that the valve body (1) and the valve cover (2) are connected by means of fastening screws.