Gas remote control leakage protection valve

Abstract

The utility model relates to a gas remote control leakage protection valve which comprises a starting button, a spring blocking ring, an adjusting ring, a starting spring, a starting cover, a starting plate, a starting nail, a starting film, a film locking plate, an air cushion cabin, a film opening ring, an air cushion seat, a micrometering valve, an upper locking cap, a film locking ring, a lock catch film, a lower locking cap, a pre-locking spring, a lock catch rod, a valve body, a ball valve, an overflowing core, a gas outlet, a gas inlet, a lock catch pin, a gas inlet nozzle and a lock catch bolt. The switch comprises a switch core, a switch base, a switch pin, a switch film, a switch hook, a switch spring, a switch cover and a pressure adjusting ring. The remote-control leakage protection valve is characterized in that the remote-control leakage protection valve belongs to a normally-closed remote-control valve, a pre-locking spring is pulled by an upper arch-shaped elastic force of a locking film through a locking rod to keep a normally-closed state, a starting spring which is compressed for energy storage continuously detects the valve, and downstream pressure change is matched with a micrometering valve to continuously detect leakage; the starting spring is a remote control energy storage device, when the internal pressure of a system is normal, the gas appliance switch controls an air cushion in the air cushion cabin to change through pressure change, the starting spring drives the lock catch bolt to release and unlock through the starting film, the air cushion, the lock catch film and the lock catch rod or vice versa, and therefore opening and closing of the valve are remotely controlled. When the starting spring is released completely due to insufficient internal pressure, the remote control standby state is started by pressing the starting button by hand; the lock catch film pulls the lock catch rod to pre-compress the pre-locking spring to store energy when internal pressure rises suddenly due to remote control closing, and the pre-locking spring pulls the lock catch bolt to bolt the tail end of the switch hook when the switch film pulls the switch base and the switch hook to push the switch core to a locking position due to pressure rising.

Description

Technical Field

[0001] The utility model relates to an anti-leakage valve which is remotely opened and closed by a gas appliance through gas in a pipeline. Background Art

[0002] At present, ordinary self-closing valves can only prevent over-current, over-pressure and under-pressure from closing. In actual application scenarios, over-current, over-pressure and under-pressure are unlikely to occur. Most leaks start with micro-leaks, and micro-leaks caused by aging of pipeline equipment are the most likely and most dangerous real-life scenarios. The entire industry has been tirelessly researching for decades, but has not yet truly solved the problem of gas micro-leaks. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide a gas remote control leakage protection valve. The valve is in a continuous normally closed leakage detection state. When the internal pressure is insufficient, the remote control standby state is started by manually pressing the start button. When the internal pressure is normal, the gas appliance remotely controls the valve through the gas in the pipeline to open and close it. When the pipeline is disconnected and causes a large amount of leakage, the over-current self-closing valve core will immediately close itself. When the system leaks slowly and causes the internal pressure to decrease or disappear, the remote control function fails, and then the valve cannot be opened to prevent gas leakage.

[0004] The technical solution adopted by the utility model to solve the above technical problems is: a gas remote control leakage protection valve, including a starting button, a spring ring, an adjusting ring, a starting spring, a starting cover, a starting plate, a starting nail, a starting membrane, a locking membrane plate, an air cushion cabin, a membrane opening ring, an air cushion seat, a fine-tuning valve, an upper locking cap, a locking membrane ring, a locking membrane, a lower locking cap, a pre-locking spring, a locking rod, a valve body, a ball valve, a flow core, an air outlet, an air inlet, a locking pin, an air inlet nozzle, a locking bolt, a switch core, a switch seat, a switch pin, a switch membrane, a switch hook, a switch spring, a switch cover, and a pressure regulating ring; it is characterized in that: the remote control leakage protection valve is a normally closed remote control valve, wherein the upper bow-shaped elastic force of the locking membrane pulls the pre-locking spring through the locking rod to maintain the normally closed state. state, with the compressed energy-storing starting spring continuously detecting the valve and downstream pressure changes to cooperate with the fine-tuning valve for continuous leak detection; the starting spring is a remote control energy storage device, when the system internal pressure is normal, the gas appliance switch controls the air cushion change in the air cushion cabin through pressure changes, and the starting spring drives the lock bolt to disengage and unlock or vice versa through the starting membrane-air cushion-locking membrane-locking rod, thereby remotely controlling the opening and closing of the valve; when the internal pressure is insufficient and the starting spring is fully released, the remote control standby state is started by pressing the starting button manually; when the remote control is closed and the internal pressure suddenly rises, the locking membrane pulls the locking rod to pre-compress the pre-locking spring to store energy, and when the pressure rises and the switch membrane pulls the switch seat and the switch hook to push the switch core to the locked position, the pre-locking spring pulls the lock bolt to lock the tail end of the switch hook.

[0005] The gas remote control leakage protection valve is characterized in that a piston is used to replace a driving membrane and a locking membrane, or a pilot valve, a stop valve, and a gate valve structure are used to replace a lever diaphragm type pressure reducing valve structure.

[0006] Compared with the prior art, the utility model has the following beneficial effects: Since the valve is a gas remote-controlled leakage protection valve, the pressure and flow changes in the valve and downstream pipeline equipment are continuously and uninterruptedly monitored in the normally closed state. The electronic probe is prevented from being affected by the size of the space, ventilation conditions, and the obscuration of oil smoke and dust when monitoring the leakage concentration of the external environment, and the hidden dangers of detonation of circuits, coils, and static electricity caused by electronic control equipment are more thoroughly avoided. The power-free pure mechanical mechanism that remotely controls the opening and closing of the valve by the gas appliance through the gas in the pipe is not only energy-saving, but also safer and more reliable. Even extremely small leakage in the downstream will cause the pipeline to lose pressure and then the remote control to fail, so as to avoid the danger of leakage and explosion. The real anti-micro-leakage function that the entire industry has been diligently pursuing for decades has been realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 This is a main cross-sectional view of a gas remote-controlled leakage protection pipeline valve structure according to an embodiment of the utility model.

[0008] Figure 2 This is a main sectional view of a gas remote-controlled leak-proof cylinder valve structure according to an embodiment of the utility model. DETAILED DESCRIPTION

[0009] Example 1: See Figure 1 The present embodiment is a gas remote control leakage protection valve, which mainly includes a starting button 1, a retaining spring ring 2, an adjusting ring 3, a starting spring 4, a starting cover 5, a starting plate 6, a starting nail 7, a starting membrane 8, a locking membrane plate 9, an air cushion cabin 10, a film opening ring 11, an air cushion seat 12, a fine-tuning valve 13, an upper locking cap 14, a locking membrane ring 15, a locking membrane 16, a lower locking cap 17, a pre-locking spring 18, a locking rod 19, a valve body 20, a ball valve 21, a flow core 22, an air outlet 23, an air inlet 24, a locking pin 25, an air inlet nozzle 26, a locking bolt 27, a switch core 28, a switch seat 29, a switch pin 30, a switch membrane 31, a switch hook 32, a switch spring 33, a switch cover 34, and a pressure regulating ring 35.

[0010] In this embodiment, the start cover 5 inserts the film opening ring 11, the start film 8 and the air cushion seat 12 and presses them into the valve body 20 with threads. Then, the lock film 16 is pressed into the air cushion seat 12 with threads by the lock film ring 15. The start film 8 and the air cushion capsule 10 and the lock film 16 form an independent air cushion capsule 10, and the air cushion capsule 10 is connected to the flow channel and the air outlet 23 in the valve body 20 through the filling and discharge flow channel in the fine-tuning valve 13. The air cushion in the air cushion capsule 10 is equivalent to a clutch or a short circuit between the start button 1 and the lock rod 19. When the pressure is normal, the start button 1 drives the lock rod 19 through the air cushion, and when the pressure is low, the start button 1 drives the lock rod 19 through the start nail 7.

[0011] As shown in the figure, a start button 1 is arranged in the middle hole of the top of the start cover 5, and the start button 1 passes through the retaining spring ring 2, the adjustment ring 3, the start spring 4, the start plate 6, and the start membrane 8, and then the start nail 7 presses the start membrane 8 under the start plate 6 with a gasket. The lock rod 19 passes through the pre-locking spring 18, the lower lock cap 17, the lock membrane 16, the lock membrane plate 9, and the upper lock cap 14, and the lock membrane 16 is clamped between the lower lock cap 17 and the upper lock cap 14. The cross fork on the lock bolt 27 that can swing with the lock pin 25 as a fulcrum is inserted into the neck of the lock rod 19 between the lower lock cap 17 and the pre-locking spring 18. The round section on the switch hook 32 that is hooked into the tail groove of the switch core 28 and swings with the switch pin 30 as a fulcrum passes through the inner groove of the switch seat 29 and the rear end extends to the inside of the lock bolt 27. The typical lever diaphragm pressure reducing valve structure is composed of the air inlet 26, the switch core 28, the switch seat 29, the switch pin 30, the switch membrane 31, the switch hook 32, the switch spring 33, the switch cover 34, and the pressure regulating ring 35. A flow core 22 (a mature purchased part, which will not be described in detail) is arranged between the air inlet 24 and the air inlet 26. When the pipeline is disconnected and the flow exceeds the specified value, the flow core 22 is automatically closed and cut off.

[0012] Because this valve is a remote-controlled normally closed valve, when the remote control fails due to internal pressure loss caused by initial installation of the pipeline or long-term disuse, it is necessary to manually press the start button 1 first, and the start nail 7 at the lower end of the start button 1 directly presses the locking cap 14 and the lock rod 19 to drive the lock bolt 27 to unlock the switch hook 32. At the same time, the compressed switch spring 33 drives the switch core 28 to open through the switch membrane 31, the switch seat 29 and the switch hook 32, and the flow channel in the valve body 20, the air cushion cabin 10, the air outlet 23 and the downstream pipeline equipment are inflated to enter the normally closed leak detection, i.e. remote control standby state.

[0013] When the gas appliance switch is turned on in the normally closed leak detection-remote control standby state, the pressure in the valve and the downstream pipeline will drop rapidly, and the pressure difference between the upper and lower surfaces of the lock film 16 will change suddenly. At this moment, because the flow channel in the air cushion capsule 10 connecting the valve and the flow channel of the downstream fine-tuning valve 13 are narrow, the pressure in the air cushion capsule 10 does not have time to drop synchronously, resulting in temporary storage of the air cushion. The starting spring 4 in the compressed energy storage state pushes the lock film 16 and the lock rod 19 through the air cushion 10 and drives the lock bolt 27 to unlock the switch hook 32 and the switch core 28 to open the air inlet 26.

[0014] At the moment of closing the gas appliance, the pressure in the valve and the downstream flow channel suddenly rises and is higher than the pressure in the air cushion cabin 10. Since the flow channel of the fine-tuning valve 13 is narrow, the pressure in the air cushion cabin 10 does not have time to rise synchronously and is relatively low. Then, the pressure difference between the upper and lower surfaces of the lock film 16 and the upward elastic force generated by the bow shape of the lock film 16 work together to pull the lock rod 19 upward and compress the pre-lock spring 18. At the same time, the internal pressure of the valve body 20 suddenly rises through the switch film 31, and the switch seat 29 pulls the switch hook 32 downward and pushes the switch core 28 to close the air inlet 26, while compressing the switch spring 33 to store energy. When the switch hook 32 moves downward to the locked position, the compressed pre-lock spring 18 pushes the lock bolt 27 through the gasket to lock the tail end of the switch hook 32, so that the system enters the normally closed leak detection state, i.e., the remote control standby state.

[0015] In the normally closed leak detection-remote control standby state, if the instantaneous flow of this valve and the downstream pipeline device is less than the flow of the fine-tuning valve 13, there will be no pressure difference between the upper and lower surfaces of the lock film 16 during the leakage pressure reduction process, resulting in the gradual disappearance of the air cushion in the air cushion cabin 10. During this period, the starting spring 4 is gradually released until the lower end of the starting pin 7 approaches the locking cap 14 but does not touch it, and the neck shoulder surface of the starting button 1 is blocked by the spring ring 2. At this time, due to the upward elastic force of the lock film 16 itself on the lock rod 19, the pre-locking spring 18 continues to maintain the pre-compression state, and then through the lock bolt 27 and the switch hook 32-switch core 28, the air inlet nozzle 26 is locked, that is, the continuous leakage prevention state.

[0016] Example 2, see Figure 2 , this embodiment is a gas remote control leakage protection valve adapted to cylinder gas, mainly including a start button 36, a spring ring 37, an adjusting ring 38, a start cover 39, a start spring 40, a start nail 41, a start plate 42, a locking film plate 43, a starting film 44, a film opening ring 45, an air cushion cabin 46, a fine-tuning valve 47, an air cushion seat 48, a locking film ring 49, an upper locking cap 50, a lower locking cap 51, a locking film 52, a locking rod 53, a pre-locking spring 54, a valve body 55, a switch pin 56, an air outlet 57, an air inlet 58, a locking pin 59, a flow core 60, a locking bolt 61, an air inlet nozzle 62, a switch membrane 63, a switch core 64, a switch spring 65, a switch hook 66, a pressure regulating ring 67, a switch seat 68, and a switch cover 69.

[0017] The lower part of this embodiment is actually a classic gas cylinder pressure reducing valve, but the remote control leakage protection and measurement and control function of the upper part is added on the basis of the classic pressure reducing valve. In addition to canceling the ball valve 21 in Example 1, the air inlet structure is also changed to make the air inlet 58 compatible with the ordinary gas cylinder angle valve. The other structural principles are the same as those in Example 1 and will not be repeated here.

[0018] Other implementations, such as replacing the driving membrane with a piston or replacing the lever diaphragm pressure reducing valve structure with a pilot valve, a stop valve, or a gate valve structure to achieve opening and closing actions, are the same as the core control principle of the utility model, and the controlled switch valves are all commonly used classic structures, which will not be elaborated here.

[0019] Although the utility model has been disclosed in the form of embodiments as above, it is not intended to limit the protection scope of the utility model. In short, any changes and modifications made by any technician familiar with the technology without departing from the concept and scope of the utility model should fall within the protection scope of the utility model.

Claims

1. A gas remote control leakage protection valve, comprising a start button, a spring ring, an adjustment ring, a start spring, a start cover, a start plate, a start nail, a start membrane, a membrane locking plate, an air cushion cabin, a membrane opening ring, an air cushion seat, a fine-tuning valve, an upper locking cap, a membrane locking ring, a locking membrane, a lower locking cap, a pre-locking spring, a locking rod, a valve body, a ball valve, a flow core, an air outlet, an air inlet, a locking pin, an air inlet nozzle, a locking bolt, a switch core, a switch seat, a switch pin, a switch membrane, a switch hook, a switch spring, a switch cover, and a pressure regulating ring; characterized in that: The remote control leakage protection valve belongs to a normally closed remote control valve, in which the upper bow-shaped elastic force of the locking film pulls the pre-locking spring through the locking rod to maintain the normally closed state, and the compressed starting spring that stores energy continuously detects the valve and the downstream pressure changes to cooperate with the fine-tuning valve to continuously detect leakage; the starting spring is a remote control energy storage device, when the internal pressure of the system is normal, the gas appliance switch controls the air cushion change in the air cushion cabin through pressure changes, and the starting spring drives the locking bolt to disengage and unlock or vice versa through the starting membrane-air cushion-locking membrane-locking rod, thereby remotely controlling the opening and closing of the valve; when the internal pressure is insufficient and the starting spring is fully released, the remote control standby state is started by pressing the starting button manually; when the remote control is closed and the internal pressure suddenly rises, the locking film pulls the locking rod to pre-compress the pre-locking spring to store energy, and when the pressure rises so that the switch membrane pulls the switch seat and the switch hook pushes the switch core to the locked position, the pre-locking spring pulls the locking bolt to lock the tail end of the switch hook.

2. A gas remote control leakage protection valve according to claim 1, characterized in that: The driving membrane and the locking membrane are replaced by a piston, or the lever diaphragm type pressure reducing valve structure is replaced by a pilot valve, a stop valve, or a gate valve structure.

Images