CN218625440U

CN218625440U - Overpressure protection self-closing valve

Info

Publication number: CN218625440U
Application number: CN202223220965.0U
Authority: CN
Inventors: 晏志龙
Original assignee: Jiaxing Beside Electromechanical Co ltd
Current assignee: Jiaxing Beside Electromechanical Co ltd
Priority date: 2022-12-02
Filing date: 2022-12-02
Publication date: 2023-03-14
Anticipated expiration: 2032-12-02

Abstract

The utility model relates to an overpressure protection self-closing valve. The self-closing valve solves the technical problem that the existing self-closing valve is unreasonable in design. The overpressure protection self-closing valve comprises a main valve body, wherein a fluid channel is arranged in the main valve body, an air inlet and an air outlet are respectively arranged at two ends of the fluid channel, and the overpressure protection self-closing valve further comprises: the valve device comprises a rotating rod which is rotatably arranged in the main valve body and a stop valve which is connected to the rotating rod and can cut off a fluid passage; the overpressure self-driving device comprises a cavity arranged on one side of the fluid channel, a valve rod arranged in the cavity in a penetrating mode and one end of the valve rod is connected with the rotating rod, and an elastic airtight membrane sleeved on the valve rod and used for separating the cavity from the fluid channel. The overpressure protection self-closing valve can rapidly realize the self-control closing operation of the fluid channel in an overpressure state in the fluid channel, ensures the safety of fuel gas, and avoids the phenomenon that the valve rod moves repeatedly to cause the leakage of the cut-off valve due to unstable air pressure of the fluid channel.

Description

Overpressure protection self-closing valve

Technical Field

The utility model belongs to the technical field of the self-closing valve, a superpressure protection self-closing valve is related to.

Background

The pressure of the gas in the gas storage device is far higher than the atmospheric pressure, once the pipeline is blocked or the control valve is turned off, overpressure can occur inside the pipeline, and the pipeline can be broken or fall off, so that the gas stored in the gas storage device is leaked, and the potential safety hazard is high.

For example, the Chinese patent document discloses a gas self-closing valve [201810580686.4], which comprises: the main valve body, the forward closing mechanism, the overpressure protection mechanism and the diaphragm are arranged in the valve body; the air inlet and the air outlet of the main valve body are respectively connected with the air storage equipment and a pipeline connected with the gas utilization equipment; the diaphragm is hermetically connected with the opening of the main valve body; when the current height of the diaphragm bulging towards the upper side of the diaphragm is not more than the set height, the diaphragm can be connected with the overpressure protection mechanism, vertical tension is applied to the overpressure protection mechanism and maintained, and when an overpressure phenomenon occurs in a pipeline, a target height is bulged, so that the overpressure protection mechanism is separated from the diaphragm, and the target height is larger than the set height; the overpressure protection mechanism applies and maintains horizontal thrust to the forward closing mechanism according to the vertical pulling force, and when the overpressure protection mechanism is separated from the diaphragm, the horizontal thrust disappears; when the forward closing mechanism receives horizontal thrust, an air gap is formed between the forward closing mechanism and the inner wall of the main valve body, and when the horizontal thrust disappears, the forward closing mechanism is in sealing connection with the inner wall of the main valve body. Through this gas self-closing valve, can improve the security of gas use, but under the comparatively unstable condition of internal gas pressure, the anti-moving that resets reduces device life and leads to the leakage problem easily.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the above-mentioned problem that prior art exists, provide an overpressure protection self-closing valve.

The purpose of the utility model can be realized by the following technical proposal:

the overpressure protection self-closing valve comprises a main valve body, wherein a fluid channel is arranged in the main valve body, an air inlet and an air outlet are respectively arranged at two ends of the fluid channel, and the overpressure protection self-closing valve further comprises:

the valve device comprises a rotating rod which is rotatably arranged in the main valve body and a cut-off valve which is connected to the rotating rod and can cut off a fluid channel;

the overpressure self-driving device comprises a cavity arranged on one side of the fluid channel, a valve rod arranged in the cavity in a penetrating mode and with one end connected with the rotating rod, an elastic airtight membrane sleeved on the valve rod and used for separating the cavity from the fluid channel, and a return spring arranged in the cavity and abutted against the valve rod.

Further, one end of the valve rod extends out of the main valve body and can move along the axial direction of the valve rod.

Furthermore, the outside of the main valve body is provided with a reset protection device, the reset protection device comprises a sliding groove arranged on the outside of the main valve body, a reset spring arranged in the sliding groove, and a sliding reset block connected with the reset spring and acting on the valve rod.

Furthermore, a gear groove for the end part of the reset block to be clamped in a matching mode is formed in the valve rod.

Furthermore, one side of the sliding reset block extends out of the shifting block of the sliding groove, and the sliding groove is provided with a guide notch for the shifting block to move correspondingly.

Further, the one end that the valve rod stretched into in the main valve body is equipped with spacing breach, the one end correspondence embedding spacing breach that the trip valve was kept away from to the bull stick.

Furthermore, one end of the valve rod extending out of the main valve body is hinged with one end, far away from the cut-off valve, of the rotating rod.

Further, the trip valve is including wearing to establish the connecting rod of bull stick one end sets up the closed piece of connecting rod tip to and the cover is established the connecting rod outside just is located the bull stick and seals the sticising spring between the piece.

Furthermore, one end of the sliding reset block, which is close to the valve rod, is provided with an abutting inclined surface.

Furthermore, one side of the elastic airtight membrane close to the fluid channel is provided with an annular arc-shaped groove.

Compared with the prior art, the overpressure protection self-closing valve is in a state that a safety air pressure cut-off valve is connected with a fluid channel for normal use in the fluid channel, meanwhile, the fluid channel is pressurized by air pressure, and the cut-off valve closes the fluid channel, so that the self-control closing operation of the fluid channel can be quickly realized in an overpressure state, the safety of fuel gas is ensured, the sliding reset block is elastically clamped into the matching of the gear groove on the valve rod, the displacement locking of the valve rod is realized, and the phenomenon that the cut-off valve leaks due to the fact that the valve rod moves repeatedly due to unstable air pressure of the fluid channel is avoided.

Drawings

Fig. 1 is a schematic structural diagram of an overpressure protection self-closing valve provided by the present invention.

Fig. 2 is a schematic sectional structure view of the overpressure protection self-closing valve of fig. 1.

FIG. 3 is an enlarged partial schematic view of the overpressure protection self-closing valve of FIG. 2.

FIG. 4 is a schematic diagram of a shut-off valve provided in the overpressure protection self-closing valve of FIG. 1.

In the figure, 10, the main valve body; 11. a fluid channel; 12. an air inlet; 13. an air outlet; 14. a valve cover; 15. a cavity; 16. a partition panel; 17. connecting holes; 20. a valve means; 21. a rotating rod; 22. a shut-off valve; 221. a connecting rod; 222. a closing block; 223. a compression spring; 23. a C-shaped port; 30. an overpressure self-driving device; 31. a valve stem; 32. an elastic airtight film; 33. a return spring; 34. a limiting notch; 35. an annular arc-shaped groove; 40. resetting the protection device; 41. a sliding groove; 42. a return spring; 43. a sliding reset block; 44. a gear groove; 45. shifting blocks; 46. a guide notch; 47. abutting against the inclined surface.

Detailed Description

Example one

Please refer to fig. 1 to 4, which are schematic structural views of an overpressure protection self-closing valve according to the present invention. The overpressure protection self-closing valve comprises a main valve body 10; valve device 20 disposed in main valve body 10, overpressure self-driving device 30 disposed on one side of main valve body 10, and reset protection device 40 disposed outside main valve body 10. It is contemplated that the overpressure protection self-closing valve may further include other functional components and specific structures, such as electrical connection components, mounting structures, etc., which are well known to those skilled in the art, and therefore, will not be described in detail herein.

The main valve body 10 is provided with a fluid passage 11, in this embodiment, the fluid passage 11 is a straight pipe, and it is conceivable that the main valve body 10 may also be applied to a bent pipe, a three-way pipe, and the like. The two ends of the fluid channel 11 are respectively provided with an air inlet 12 and an air outlet 13, the air inlet 12 is connected with a gas channel, and the air outlet 13 is connected with gas appliances such as a gas stove and a gas water heater. A valve cover 14 is arranged on one side of the main valve body 10, a cavity 15 communicated with the fluid channel 11 is formed in one side, close to the valve cover 14, of the main valve body 10, and internal components of the main valve body 10 can enter and be installed through the valve cover 14.

The valve device 20 is arranged on a rotating rod 21 in the main valve body 10, a rotating shaft sleeve which is sleeved on the outer side of the rotating rod 21 and is used for limiting and fixing the rotating rod 21 is arranged in the fluid channel 11, and a cut-off valve 22 which is connected on the rotating rod 21 and can cut off the fluid channel 11 is arranged in the fluid channel 11, and the cut-off valve 22 is used for controlling the on-off of the fluid channel 11. It is conceivable that a blocking piece 16 is provided in the fluid passage 11 and that the blocking piece 16 is provided with a connecting hole 17 that is fitted with the shut valve 22. More specifically, the shut-off valve 22 comprises a connecting rod 221 penetrating through one end of the rotating rod 21, a closing block 222 arranged at the end of the connecting rod 221, and a pressing spring 223 sleeved outside the connecting rod 221 and located between the rotating rod 21 and the closing block 222, when the shut-off valve 22 rotates along with the rotating rod 21 to approach the connecting hole 17, the pressing spring 223 is pressed between the rotating rod 21 and the closing block 222, the pressing spring is reversely pressed on the closing block 222, and the closing block 222 tightly closes the connecting hole 17. The C-shaped port 23 is arranged at one end of the rotating rod 21, the structure of the C-shaped port 23 is made of elastic materials, the connecting rod 221 is elastically clamped into the C-shaped port 23 to be installed, the stop valve 22 is pressed on the sealing block 222 through the compression spring 223 to increase the sealing performance, the moving stroke of the valve rod 31 is prolonged, the valve rod can be used for controlling the on-off node of the stop valve 22, and the whole device is more reliable and stable in matching.

The overpressure self-driving device 30 comprises a valve rod 31 which is arranged in the cavity 15 in a penetrating manner and one end of the valve rod 31 is connected with the rotating rod 21, the valve rod 31 is arranged on the valve cover 14 in a penetrating manner and radially penetrates into the fluid channel 11, and the valve rod 31 can move on the valve cover 14 along the axial direction of the valve rod 31. The valve cover 14 is provided with a channel for the valve rod 31 to pass through, the channel is attached to the outer wall of the valve rod 31, the channel is a tapered hole, the inner diameter of the channel is gradually reduced outwards, the valve rod 31 moves axially along the channel, and radial shaking of the valve rod 31 is reduced.

The end of the valve rod 31 extending into the main valve body 10 is provided with a limit notch 34, the end of the rotating rod 21 far away from the cut-off valve 22 is correspondingly embedded into the limit notch 34, and when the valve rod 31 moves along the valve cover 14, the rotating rod 21 is driven to rotate to control the on-off action of the cut-off valve 22.

The valve rod 31 is sleeved with an elastic airtight membrane 32, and the elastic airtight membrane 32 separates the cavity 15 from the fluid passage 11. And a return spring 33 disposed in said cavity 15 and abutting on the valve stem 31. When the air pressure in the fluid passage 11 is in the safe range, the elastic force of the return spring 33 is larger than the pressure of the air pressure in the fluid passage 11 acting on the elastic airtight membrane 32, the valve rod 31 is driven to extend inwards, and the cut-off valve 22 is communicated with the fluid passage 11; when the gas pressure in the fluid passage 11 is over-pressure, the force for extruding the elastic airtight membrane 32 is larger than the elastic force of the return spring 33, the valve rod 31 is driven to extend outwards, and the cut-off valve 22 closes the fluid passage 11, so that the self-control sealing operation of the fluid passage 11 can be rapidly realized in an over-pressure state, and the safety of the gas is ensured. The airtight membrane 32 of elasticity one side that is close to fluid passage 11 is equipped with cyclic annular arc wall 35, and the structural design of annular arc wall makes the airtight membrane 32 of elasticity pressurized even, and valve rod 31 removes more stably and improves the airtight membrane 32 life of elasticity.

The outer side of the main valve body 10 is provided with a reset protection device 40, the reset protection device 40 comprises a sliding groove 41 arranged on the outer side of the main valve body 10, a reset spring 42 arranged in the sliding groove 41, and a sliding reset block 43 connected with the reset spring 42 and acting on the valve rod 31. The valve rod 31 is provided with a gear groove 44 for the end part of the reset block to be matched and clamped. When the self-closing valve enters an overpressure state, the length of the valve rod 31 extending out of the main valve body 10 is lengthened, the valve rod 31 abuts against the sliding reset block 43 to force the sliding reset block 43 to extrude the reset spring 42, and when the sliding reset block 43 is elastically clamped into the gear groove 44 on the valve rod 31, displacement locking of the valve rod 31 is achieved, and the phenomenon that the valve rod 31 repeatedly moves to cause leakage of the cut-off valve 22 due to unstable air pressure of the fluid channel 11 is avoided.

The one end that the slip reset block 43 is close to valve rod 31 is equipped with butt inclined plane 47, and when butt inclined plane 47 supports at the slip reset block 43 at valve rod 31, make both butt cooperations and displacement more smooth and easy.

One side of the sliding reset block 43 extends out of the shifting block 45 of the sliding groove 41, and the sliding groove 41 is provided with a guide notch 46 for the shifting block 45 to move correspondingly. The shifting block 45 is beneficial to being grasped by hands and exerting force on the sliding reset block 43, and the guide notch 46 provides a guide effect for the shifting block 45 to move, so that the manual reset function of the self-closing valve is realized.

Example two

The structure and principle of the present embodiment are substantially the same as those of the first embodiment, and the only difference lies in that: the end of the valve rod 31 extending out of the main valve body 10 is hinged to the end of the rotating rod 21 far away from the cut-off valve 22, and in this embodiment, the hinged manner can also achieve the effect that the valve rod 31 moves to drive the rotating rod 21 to rotate.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. An overpressure protection self-closing valve comprises a main valve body, wherein a fluid channel is arranged in the main valve body, and an air inlet and an air outlet are respectively arranged at two ends of the fluid channel, and the overpressure protection self-closing valve is characterized by further comprising:

the valve device comprises a rotating rod which is rotatably arranged in the main valve body and a stop valve which is connected to the rotating rod and can cut off a fluid passage;

2. Overpressure protection self-closing valve according to claim 1, characterized in that one end of said stem protrudes from the main valve body and is axially movable along the stem itself.

3. Overpressure protection self-closing valve according to claim 2, characterized in that outside of the main valve body there is a reset protection device comprising a sliding groove arranged outside of the main valve body, in which sliding groove there is a reset spring, and a sliding reset block connected to the reset spring and acting on the valve stem.

4. The overpressure protection self-closing valve as claimed in claim 3, wherein the valve stem is provided with a gear groove for the end of the reset block to engage.

5. The overpressure protection self-closing valve as recited in claim 3 wherein one side of the sliding reset block extends out of the shifting block of the sliding groove and the sliding groove is provided with a guiding notch for the shifting block to move correspondingly.

6. The overpressure protection self-closing valve as claimed in claim 1, wherein the end of the valve stem extending into the main valve body is provided with a limiting notch, and the end of the rotating rod far away from the cut-off valve is correspondingly embedded into the limiting notch.

7. Overpressure protection self-closing valve according to claim 1, wherein the end of the valve stem extending out of the main valve body is hinged to the end of the rotating rod remote from the shut-off valve.

8. The overpressure protection self-closing valve as claimed in claim 1, wherein the shut-off valve comprises a connecting rod penetrating one end of the rotating rod, a closing block arranged at the end of the connecting rod, and a compression spring sleeved outside the connecting rod and located between the rotating rod and the closing block.

9. The overpressure protection self-closing valve of claim 3, wherein the end of the sliding reset block near the valve stem is provided with an abutting inclined surface.

10. Overpressure protection self-closing valve according to claim 1, characterised in that the side of the elastic airtight membrane close to the fluid passage is provided with an annular arc-shaped groove.