CN217381781U

CN217381781U - Small-bore safety relief valve

Info

Publication number: CN217381781U
Application number: CN202220949543.8U
Authority: CN
Inventors: 姚保纯
Original assignee: Changzhou Bairui Gas Technology Co ltd
Current assignee: Changzhou Bairui Gas Technology Co ltd
Priority date: 2022-04-22
Filing date: 2022-04-22
Publication date: 2022-09-06
Anticipated expiration: 2032-04-22

Abstract

The utility model relates to the technical field of a bleeding valve, in particular to a small-caliber safety bleeding valve, which comprises a valve body, a valve port, a valve clack body and an adjusting seat, wherein the valve port, the valve clack body and the adjusting seat are arranged in the valve body; the air outlet is arranged on the side wall of the valve body, the valve port, the valve clack body and the adjusting seat are sequentially arranged in the through hole of the valve body along the axial direction of the valve body, one end, far away from the valve port, of the valve clack body penetrates through the adjusting seat and is in sliding connection with the adjusting seat, the valve clack body is pressed towards the valve port through a pressing spring sleeved on the valve clack body, and a through hole of the valve port is plugged. The dead weight of the valve clack body is reduced or the parameters of a compression spring are changed to realize accurate diffusion adjustment and meet the demand of diffusion flow; the volume of the bleeding valve is only about 1/10 of the conventional bleeding valve, so that the rapid movement of the valve flap body under a small pressure area is ensured; the bleeding valve has the advantages of few parts, small volume and low cost, and compared with a built-in bleeding mode of a pressure regulator, the small-caliber independent bleeding valve structure is adopted to discharge gas to atmosphere, so that the safety is higher.

Description

Small-bore safety relief valve

Technical Field

The utility model relates to a diffuse valve technical field especially relates to a small-bore safety diffuse valve.

Background

The caliber of a low-pressure bleeding valve applied to gas pressure regulation at present is generally equal to or more than DN25, and for a plurality of gas pressure regulating devices with flow less than 100 square in life, the low-pressure bleeding valve has larger volume and higher caliber cost; therefore, a pressure regulator with built-in diffusion is generally selected, but in practical application, the diffusion amount is too small, the related industry regulations are not met in a strict sense, and the built-in diffusion function of the pressure regulator is lost due to the fact that a built-in diffusion spring of the pressure regulator is assembled due to user operation errors in the using process.

For building style gas equipment with small caliber and small flow, because the equipment is small, a special independent bleeding valve is not usually arranged for controlling cost, a pressure regulator with built-in bleeding is adopted for regulating pressure, the gas equipment is prevented from being effectively diffused due to small bleeding amount when the pressure is boosted, and the risk coefficient is large.

In view of the above problems, the designer is actively making research and innovation based on the practical experience and professional knowledge that is abundant for years in the engineering application of such products, in order to create a small-bore safety bleeding valve, so that the small-bore safety bleeding valve has higher practicability.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a small-bore safety relief valve aiming at the defects existing in the prior art.

In order to achieve the above purpose, the utility model adopts the technical scheme that: a small bore safety relief valve comprising: the valve body is provided with an air inlet and an air outlet which are communicated through an air channel, the valve body is of a cylinder structure with two through ends, the air inlet is arranged at one end of the valve body, and the other end of the valve body is provided with an end cover;

the valve port and the adjusting seat are respectively fixedly connected with the inner walls of the through holes of the valve body, which are axially positioned at two sides of the gas outlet, and are communicated with the gas channel;

one end, far away from the valve port, of the valve flap body penetrates through the adjusting seat and is in sliding connection with the adjusting seat, the valve flap body is pressed towards the valve port through a pressing spring sleeved on the valve flap body, and the valve flap body plugs a conducting hole of the valve port.

Furthermore, a step is arranged on the inner wall of the valve body channel in a protruding mode, the valve port comprises a first portion and a second portion which are arranged along the length direction of the valve port, the first portion is arranged close to the air inlet, and the annular surface of the second portion, which is close to the first portion, is abutted against the step.

Further, the outer diameter of the first portion is matched with the inner diameter of the step, and a first sealing ring is arranged at the root part, close to the second portion, of the first portion.

Furthermore, a clamping groove is formed in one end, close to the second portion, of the first portion along the circumferential direction of the first portion, and the first sealing ring is arranged in the clamping groove.

Furthermore, a first through hole and a second through hole are respectively formed in the valve port and the adjusting seat along the axial direction of the valve port and the adjusting seat, the valve flap body comprises a sealing cover and a guide rod, and the sealing cover is arranged close to the valve port and tightly presses and blocks one end of the first through hole;

the compression spring is sleeved on the guide rod, two ends of the compression spring are respectively abutted to the sealing cover and the adjusting seat, and a second sealing ring is arranged in the second through hole and sleeved on the guide rod.

Further, the second through hole includes third part, spacing annular and the fourth part that sets gradually along its axial, the third part is close to sealed lid sets up, and its internal diameter is greater than the fourth part, the second sealing washer sets up in the spacing annular.

Furthermore, the guide rod comprises a first rod body and a second rod body which are arranged along the axial direction of the guide rod, the first rod body is arranged close to the sealing cover, and the diameter of the first rod body is larger than that of the second rod body;

the diameter of the second rod body is smaller than the inner diameter of the fourth portion, and the diameter of the first rod body is matched with the inner diameter of the fourth portion.

Furthermore, the diameter of the joint of the first rod body and the second rod body is gradually reduced towards the second rod body, and the second sealing ring is a V-shaped ring.

Furthermore, a cutting edge is convexly arranged on the end face, close to the sealing cover, of the first through hole, the sealing cover is in contact with the cutting edge, and a vulcanized sealing surface is arranged on the sealing cover in a region corresponding to the first through hole.

Furthermore, a joint is arranged at the air outlet.

The utility model has the advantages that:

the application discloses a small-caliber safety relief valve, which realizes accurate relief adjustment by reducing the dead weight of a valve clack body or changing the parameters of a compression spring and meets the relief flow demand; the volume of the bleeding valve is only about 1/10 of the conventional bleeding valve, so that the valve flap body can move rapidly under a small pressure area;

this application bleeding valve part is few, and is small, and part material is with low costs, compares in the independent type bleeding valve of conventionality and has more the practicality, and the built-in mode of bleeding of voltage regulator diffuses relatively, has adopted small-bore independent type bleeding valve structure, makes gas by direct emission in the atmosphere, and the security obtains very big improvement.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural view of a middle and small diameter safety bleeding valve of the present invention;

FIG. 2 is an exploded view of the bleed valve structure of the present invention;

fig. 3 is a schematic diagram of the bleed valve of the present invention used as a straight-through bleed.

Reference numerals: 1. a valve body; 11. an air inlet; 12. an air outlet; 13. a gas channel; 14. an end cap; 15. a step; 16. a joint; 2. a valve port; 21. a first portion; 22. a second portion; 23. a first seal ring; 24. a card slot; 25. a first through hole; 26. cutting edges; 3. a valve flap body; 31. a compression spring; 32. a sealing cover; 321. vulcanizing the sealing surface; 33. a guide bar; 331. a first rod body; 332. a second rod body; 4. an adjusting seat; 41. a second through hole; 411. a third portion; 412. a limiting ring groove; 413. a fourth part; 42. and a second seal ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The conventional bleeding valve is generally in a diaphragm type, so that in order to obtain a relatively sensitive pressure regulating effect, the effective pressure area of a diaphragm disc is generally over 75 mm, and the diaphragm is connected with an upper cavity and a lower cavity through bolts, so that the outer diameters of the upper cavity and the lower cavity are generally not less than 125 mm, and the effective pressure area of the diaphragm disc is usually increased in order to obtain better bleeding accuracy; thus leading to larger volume, and the outer diameters of the upper cavity and the lower cavity can reach 150 and 200 millimeters generally; for a plurality of gas pressure regulating devices with the flow rate less than 100 square in life, the gas pressure regulating devices are large in size and high in caliber cost.

The application discloses a small-caliber safety relief valve, as shown in fig. 1 to 3, comprising a valve body 1, a valve port 2, a valve flap body 3 and an adjusting seat 4, wherein the valve body 1 is provided with an air inlet 11 and an air outlet 12 which are communicated through an air channel 13, the valve body 1 is arranged into a cylinder structure with two through ends, the air inlet 11 is arranged at one end of the valve body 1, the other end of the valve body 1 is provided with an end cover 14, the air outlet 12 is arranged on the side wall of the valve body 1, the valve port 2, the valve flap body 3 and the adjusting seat 4 are sequentially arranged in through holes of the valve body 1 along the axial direction of the valve body, and the valve port 2 and the adjusting seat 4 are respectively fixedly connected with the inner walls of the through holes of the valve body 1 axially positioned at two sides of the air outlet 12 and are communicated with the air channel 13; the one end that the valve clack body 3 kept away from valve port 2 passes and adjusts seat 4 and rather than sliding connection, and the valve clack body 3 is established pressure spring 31 on it through the cover and is compressed tightly towards valve port 2 to carry out the shutoff to the conducting hole of valve port 2.

In this embodiment, the volume of the small-bore safety relief valve is only about 1/10 of the conventional relief valve, and in order to ensure a small pressure area, the rapid movement of the valve clack body 3 is realized by reducing the dead weight of the valve clack body 3 or changing the parameters of the compression spring 31. The bleeding valve disclosed in the application has few parts, small volume and low cost of part materials, and has higher practicability compared with a conventional independent bleeding valve. Furthermore, the diffusion valve is different from a mode of adopting a pressure regulator to internally diffuse, an independent diffusion valve structure is adopted, gas is directly discharged into the atmosphere, and the safety is greatly improved.

In the present embodiment, a step 15 is protrudingly provided on the inner wall of the channel of the valve body 1, the valve port 2 includes a first portion 21 and a second portion 22 along the length direction thereof, the first portion 21 is provided near the inlet 11, and the second portion 22 abuts against the step 15 near the annular surface of the first portion 21. Furthermore, the outer diameter of the first part 21 is adapted to the inner diameter of the step 15, and a first sealing ring 23 is arranged at the root part of the first part 21 close to the second part 22; a snap groove 24 is provided at one end of the first portion 21 near the second portion 22 along a circumferential direction thereof, and the first seal ring 23 is disposed in the snap groove 24.

As shown in fig. 1, the valve port 2 is sealed with the valve body 1 by the first sealing ring 23, and when there is no pressure at the gas inlet 11, it is ensured that no gas can flow to the gas outlet 12 or the upper half of the valve body 1; when gas with certain pressure flows into the gas inlet 11, if the pressure is relatively low and is not enough to overcome the force of the compression spring 31 and the self weight of the valve flap body 3, the valve flap body 3 and the valve port 2 still keep complete sealing performance, and at the moment, the diffusing function cannot be realized; when the inlet pressure is increased, the force of the compression spring 31 and the self weight of the valve clack body 3 can be overcome, the valve clack body 3 moves upwards and is separated from the valve port 2, a gap is formed between the valve clack body and the valve port 2, and at the moment, gas flows into the upper half part of the valve body 1 through the valve port 2 and flows out of the atmosphere outside the equipment through the joint 16, so that the diffusing function is completed.

Furthermore, a first through hole 25 and a second through hole 41 are respectively arranged on the valve port 2 and the adjusting seat 4 along the axial direction thereof, the valve flap body 3 comprises a sealing cover 32 and a guide rod 33, and the sealing cover 32 is arranged close to the valve port 2 and tightly presses and seals one end of the first through hole 25; the compression spring 31 is sleeved on the guide rod 33, and two ends of the compression spring are respectively abutted against the sealing cover 32 and the adjusting seat 4, and a second sealing ring 42 is arranged in the second through hole 41 and sleeved on the guide rod 33. The air inlet 11 is communicated with the air outlet 12 through the first through hole 25.

As shown in fig. 2, the second through hole 41 includes a third portion 411, a limiting ring groove 412 and a fourth portion 413 sequentially arranged along the axial direction thereof, the third portion 411 is disposed adjacent to the sealing cover 32 and has an inner diameter larger than the fourth portion 413, and the second sealing ring 42 is disposed in the limiting ring groove 412. The guide rod 33 comprises a first rod body 331 and a second rod body 332 which are arranged along the axial direction of the guide rod, wherein the first rod body 331 is arranged close to the sealing cover 32, and the diameter of the first rod body 331 is larger than that of the second rod body 332; the diameter of the second rod 332 is smaller than the inner diameter of the fourth portion 413, and the diameter of the first rod 331 is adapted to the inner diameter of the fourth portion 413. The diameter of the joint of the first rod body 331 and the second rod body 332 gradually converges toward the second rod body 332, and the second sealing ring 42 is a V-shaped ring.

Specifically, the guide rod 33 is configured to be stepped and includes a first rod body 331 and a second rod body 332 with different outer diameters, a certain gap compression amount is left between the second rod body 332 and the second sealing ring 42, and when the valve body 3 is driven by pressure at the air inlet 11 to move upwards, the second rod body 332 on the guide rod 33 moves to the second sealing ring 42 and generates a compression amount, so as to achieve sealing.

Furthermore, a cutting edge 26 is convexly arranged on the end surface of the first through hole 25 close to the sealing cover 32, the sealing cover 32 is in contact with the cutting edge 26, and a vulcanized sealing surface 321 is arranged on the sealing cover 32 corresponding to the area of the first through hole 25; a joint 16 is provided at the air outlet 12.

When the air inlet 11 has no pressure, the vulcanized sealing surface 321 on the valve clack body 3 contacts with the cutting edge 26 of the valve port 2 under the action of the compression spring 31 to realize sealing, the joint 16 is an outlet end of the bleeding valve, and the bottom hole of the valve body 1 is an inlet end of the bleeding valve. As another preferred embodiment of the present application, as shown in FIG. 3, the joint 16 at the air outlet 12 is eliminated and replaced by a choke plug, the second sealing ring 42 in the limiting ring groove 412 is eliminated, the end cover 14 is eliminated and serves as the outlet end of the bleeding valve, and the inner diameter of the second through hole 41 in the adjusting seat 4 is appropriately enlarged and can be used as a through-type bleeding.

It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A small bore safety bleed valve, comprising: the valve comprises a valve body (1), a valve port (2), a valve flap body (3) and an adjusting seat (4), wherein the valve body (1) is provided with an air inlet (11) and an air outlet (12) which are communicated through an air channel (13), the valve body (1) is of a cylinder structure with two through ends, the air inlet (11) is arranged at one end of the valve body (1), and the other end of the valve body (1) is provided with an end cover (14);

the gas outlet (12) is formed in the side wall of the valve body (1), the valve port (2), the valve flap body (3) and the adjusting seat (4) are sequentially arranged in a through hole of the valve body (1) along the axial direction of the valve body, and the valve port (2) and the adjusting seat (4) are respectively fixedly connected with the inner wall of the through hole of the valve body (1) which is axially positioned at two sides of the gas outlet (12) and are communicated with the gas channel (13);

one end, far away from the valve port (2), of the valve clack body (3) penetrates through the adjusting seat (4) and is in sliding connection with the adjusting seat, and the valve clack body (3) is pressed towards the valve port (2) through a pressing spring (31) sleeved on the valve clack body and seals a through hole of the valve port (2).

2. The small-bore safety relief valve according to claim 1, characterized in that, the inner wall of the passageway of the valve body (1) is protrudingly provided with a step (15), the valve port (2) comprises a first portion (21) and a second portion (22) along the length direction thereof, the first portion (21) is arranged near the air inlet (11), and the annular surface of the second portion (22) near the first portion (21) abuts against the step (15).

3. Small-bore safety bleed valve according to claim 2, characterised in that the first portion (21) has an external diameter adapted to the internal diameter of the step (15), and in that a first sealing ring (23) is provided at the root of the first portion (21) close to the second portion (22).

4. The small-bore safety bleed valve of claim 3, wherein a snap groove (24) is provided along a circumferential direction of the first portion (21) at an end thereof adjacent to the second portion (22), and the first seal ring (23) is disposed in the snap groove (24).

5. The small-caliber safety relief valve according to claim 1, wherein a first through hole (25) and a second through hole (41) are respectively formed in the valve port (2) and the adjusting seat (4) along the axial direction thereof, the valve flap body (3) comprises a sealing cover (32) and a guide rod (33), and the sealing cover (32) is arranged close to the valve port (2) and presses and seals one end of the first through hole (25);

the compression spring (31) is sleeved on the guide rod (33), two ends of the compression spring are respectively abutted to the sealing cover (32) and the adjusting seat (4), and a second sealing ring (42) is arranged in the second through hole (41) and sleeved on the guide rod (33).

6. The small-bore safety bleed valve according to claim 5, characterised in that the second through hole (41) comprises, in succession along its axial direction, a third portion (411), a stop ring groove (412) and a fourth portion (413), the third portion (411) being arranged close to the sealing cap (32) and having an internal diameter greater than the fourth portion (413), the second sealing ring (42) being arranged in the stop ring groove (412).

7. The small-bore safety bleed valve of claim 6, wherein the guide rod (33) comprises a first rod (331) and a second rod (332) axially disposed along the guide rod, the first rod (331) being disposed adjacent to the sealing cap (32) and having a larger diameter than the second rod (332);

the diameter of the second rod body (332) is smaller than the inner diameter of the fourth part (413), and the diameter of the first rod body (331) is matched with the inner diameter of the fourth part (413).

8. The small-bore safety relief valve according to claim 7, wherein the diameter of the junction of the first rod (331) and the second rod (332) is gradually reduced toward the second rod (332), and the second sealing ring (42) is configured as a V-ring.

9. The small-bore safety relief valve according to claim 5, characterized in that a cutting edge (26) is protrudingly provided on the end surface of the first through hole (25) adjacent to the sealing cap (32), the sealing cap (32) is in contact with the cutting edge (26), and a vulcanized sealing surface (321) is provided on the sealing cap (32) in a region corresponding to the first through hole (25).

10. Small-bore safety bleed valve according to claim 1, characterised in that a joint (16) is provided at the air outlet (12).