Blow-off valve early warning device

Abstract

The utility model discloses a blow-off valve early warning device. A shell is provided with a fuel gas inlet and a fuel gas outlet. The feedback rod is slidably connected to the shell, and the two axial ends of the feedback rod are located in the shell and the indicator respectively. The base plate is mounted at one end of the feedback rod in the shell and used for sealing the gas inlet; the elastic piece is telescopically arranged between the shell and the base plate; the indicator is installed on the shell and provided with a moving channel, and at least part of the moving channel is transparent. The relief valve early warning device is communicated with the relief valve through the pipeline, due to the fact that the structure of original pressure regulating equipment does not need to be adjusted, the maintenance cost is low, the current opening state of the relief valve can be determined by observing the position of the feedback rod in the indicator, and workers can maintain the relief valve more easily. In addition, the blow-off valve early warning device is compact in overall structure, small in size, extremely small in occupied space, convenient to install and maintain, free of requirements for the valve structure and capable of being suitable for more scenes.

Description

Technical Field

[0001] The utility model relates to the technical field of gas transmission and distribution equipment, and further relates to a warning device for a blow-off valve. Background Art

[0002] Gas pressure regulating equipment is an important equipment in the technical field of gas transmission and distribution equipment. Its main function is to ensure the safety of gas use at the rear end by regulating the gas pressure. The blow-off valve is a safety device in the gas pressure regulating equipment. When the pressure at the rear end of the pressure regulation exceeds the limit, the blow-off valve will automatically blow off to delay or prevent the pressure from rising continuously.

[0003] At present, the blow-off valve generally adopts a diaphragm spring type, and the opening and closing of the valve port are controlled by the elastic force of the spring. This design enables the blow-off valve to have the characteristic of automatic blow-off, and can discharge gas in time when the pressure at the rear end of the pressure regulation exceeds the limit to ensure the safety of gas use at the rear end. However, after the blow-off valve has been running for a long time, the phenomenon of spring aging will occur, resulting in the blow-off valve blowing off continuously under normal pressure. This is not only an energy waste but also increases the maintenance cost. Therefore, it is necessary to give a warning to the blow-off valve to prevent the blow-off valve from blowing off for a long time. Although there is a way to install a remote valve position sensor in the market to monitor the state of the blow-off valve, it is difficult to detect the failure of the blow-off valve because the valve position state signal cannot be collected. Summary of the Utility Model

[0004] Aiming at the above technical problems, the purpose of the utility model is to provide a warning device for a blow-off valve, which can effectively identify the state of the blow-off valve and solve the problem of great difficulty in the maintenance and management of the blow-off valve.

[0005] In order to achieve the above purpose, the warning device for a blow-off valve provided by the utility model includes:

[0006] A housing, the housing having a gas inlet and a gas outlet;

[0007] An indicating component, the indicating component including a feedback rod, a backing plate, an elastic member and an indicator; the feedback rod is slidably connected to the housing, both axial ends of the feedback rod are located in the housing and the indicator respectively, and a spring seat is formed on the feedback rod; the backing plate is installed at one end of the feedback rod located in the housing for sealing the gas inlet; the elastic member is telescopically arranged between the housing and the spring seat; the indicator is installed on the housing, and the indicator has a moving channel for the feedback rod to pass through, and at least part of the moving channel is transparent.

[0008] In some embodiments, multiple scales are arranged on the outer side surface of the indicator, and the multiple scales extend along the axial direction of the feedback rod.

[0009] In some embodiments, the housing includes a valve body and a valve seat. The valve seat is provided with the gas inlet, the valve body is installed on the valve seat, an outlet joint is communicated with the valve body, and the gas outlet is provided in the outlet joint.

[0010] In some embodiments, the housing further includes a guide sleeve installed on the valve body, and a shaft hole for cooperating with the feedback rod is provided in the guide sleeve.

[0011] In some embodiments, a first seal is squeezed between the guide sleeve and the valve body.

[0012] In some embodiments, a second seal is sleeved on the feedback rod, and the second seal is received in the guide sleeve.

[0013] In some embodiments, a control unit, a sensing component and an early warning device are further included. The sensing component includes a Hall sensor and a magnet. The Hall sensor is disposed on the housing, the magnet is disposed on the feedback rod, and the Hall sensor and the early warning device are electrically connected to the control unit.

[0014] In some embodiments, a client is further included, and the client is electrically connected to the control unit.

[0015] In some embodiments, an indicating cover is sleeved on the feedback rod. The indicating cover is located in the indicator, and the outer diameter of the indicating cover is smaller than the inner diameter of the indicator.

[0016] Compared with the prior art, the gas blow-off valve early warning device provided by the present utility model has the following beneficial effects:

[0017] The gas blow-off valve early warning device in the present utility model is communicated with the gas blow-off valve through a pipeline. Since the structure of the original pressure regulating equipment does not need to be adjusted, the maintenance cost is relatively low. And by observing the position of the feedback rod in the indicator, the opening state of the current gas blow-off valve can be determined, making the maintenance of the gas blow-off valve by the staff simpler. In addition, the overall structure of the gas blow-off valve early warning device is compact, small in size and extremely small in space occupation, facilitating installation and maintenance. And there is no requirement for the valve structure, and it can be applied to more scenarios with a wide application range. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above characteristics, technical features, advantages and implementation manners of the present utility model will be further described below in a clear and understandable manner in conjunction with the drawings in the preferred embodiments.

[0019] Figure 1 It is a schematic structural diagram of the gas blow-off valve early warning device in the preferred embodiment of the present invention.

[0020] Figure 2 is Figure 1Schematic structural diagram of the part where the feedback rod is located.

[0021] The descriptions of the reference signs are as follows:

[0022] Valve body 1; valve seat 2; outlet joint 3; feedback rod 4; spring seat 5; magnetic part 6; backing plate 7; Hall sensor 8; elastic part 9; indicator 10; indicating cover 11; guide sleeve 12; first seal 13; second seal 14. Specific embodiments

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the specific embodiments of the present invention will be described below with reference to the drawings. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings, and other embodiments can also be obtained.

[0024] Refer to Figure 1 and Figure 2 , according to a preferred embodiment of the present invention, a warning device for a blow-off valve includes a housing and an indicating assembly.

[0025] The housing is used to connect the blow-off valve on the upstream side and the gas-using equipment on the downstream side. The housing has a gas inlet and a gas outlet. The gas inlet of the housing is connected to the gas outlet pipeline of the blow-off valve, and the gas outlet of the housing is connected to the pipeline of the downstream gas-using equipment.

[0026] The housing includes a valve body 1 and a valve seat 2. The valve body 1 is installed on the valve seat 2. Both the valve body 1 and the valve seat 2 are tubular structures and are arranged almost or generally coaxially. The gas inlet of the valve seat 2 is connected to the gas outlet pipeline of the blow-off valve. An outlet joint 3 communicating with its inner cavity is installed on one side of the valve body 1, and the gas outlet of the outlet joint 3 is connected to the gas inlet pipeline of the gas-using equipment. In this way, after the blow-off valve and the gas-using equipment are connected through the housing, when the blow-off valve is opened, the gas discharged from the blow-off valve can flow through the valve seat 2, the valve body 1 and the outlet joint 3 to the gas-using equipment to realize the gas supply to the gas-using equipment.

[0027] There is a need to have sufficient sealing performance between the valve body 1 and the valve seat 2, and between the valve body 1 and the outlet joint 3 to prevent gas from escaping from the gap between the valve body 1 and the valve seat 2 or from the gap between the valve body 1 and the outlet joint 3. Based on this, gasket sealing, thread sealing, welding sealing and other sealing methods can be adopted between the valve body 1 and the valve seat 2, and between the valve body 1 and the outlet joint 3, which is not limited here.

[0028] The housing can be an integrally formed part or assembled from multiple formed parts. If the housing is integrally formed, the forming process is relatively simple, the production efficiency is high, and the manufacturing cost is relatively low. However, when a local damage occurs, the entire housing needs to be replaced, resulting in a relatively high maintenance cost. If the housing is assembled from multiple formed parts, it has strong flexibility. During maintenance, the damaged parts can be replaced individually without the need to replace the whole, resulting in a relatively low maintenance cost. The forming method of the housing is not limited in this embodiment, and those skilled in the art can choose according to their needs.

[0029] The indicating assembly is used to indicate the current working state of the blow-off valve. The indicating assembly includes a feedback rod 4, a backing plate 7, an elastic member 9, and an indicator 10. The feedback rod 4 is slidably connected to the housing. The two axial ends of the feedback rod 4 are respectively located inside the housing and the indicator 10. The backing plate 7 is installed at one end of the feedback rod 4 located inside the housing. A spring seat 5 is formed on the feedback rod 4. The elastic member 9 is telescopically arranged between the housing and the spring seat 5. The indicator 10 is installed on the housing. The indicator 10 has a cylindrical structure and has a moving channel through which the feedback rod 4 passes. At least part of the moving channel is transparent.

[0030] After the warning device is ventilated, the backing plate 7 is pushed by the airflow and moves, and the feedback rod 4 moves synchronously with the backing plate 7. Since one end of the feedback rod 4 is located inside the indicator 10, the opening state of the current blow-off valve can be determined by observing the position of the feedback rod 4 inside the indicator 10. For example, when the part of the feedback rod 4 located inside the indicator 10 is long, the opening of the blow-off valve is large; when the part of the feedback rod 4 located inside the indicator 10 is short, the opening of the blow-off valve is small; when the part of the feedback rod 4 located inside the indicator 10 has no change relative to the initial state, the blow-off valve is completely closed. In order to more intuitively observe the position change of the feedback rod 4 before and after movement, a plurality of scale lines can be provided on the outer side surface of the indicator 10. The plurality of scale lines extend along the axial direction of the feedback rod 4, and a predetermined distance is provided between adjacent scale lines. The opening values of the blow-off valve are marked on the scale lines to associate the movement change of the feedback rod 4 with the size of the valve opening. By reading the scale lines corresponding to a specific position of the feedback rod 4 before and after movement, the opening size of the blow-off valve can be determined. For example, when the blow-off valve is completely closed, the scale line corresponding to a specific position of the feedback rod 4 is marked as 0%; when the blow-off valve is completely open, the scale line corresponding to a specific position of the feedback rod 4 is marked as 100%. The scale line marks between 0% and 100% can be 20%, 40%, 60%, 80%, etc., which are not limited in this embodiment.

[0031] In this embodiment, the feedback rod 4 can move relative to the indicator 10. If the feedback rod 4 contacts the indicator 10, wear will occur due to mutual friction between the feedback rod 4 and the indicator 10, which will not only cause obstacles to the movement of the feedback rod 4 but also affect the measurement accuracy of the opening degree of the bleed valve by the indicator 10. Based on this, the outer diameter of the feedback rod 4 in this embodiment is smaller than the inner diameter of the indicator 10, so that the feedback rod 4 will not contact the indicator 10 during movement. In addition, an indicating cover 11 can be sleeved at one end of the feedback rod 4, and the outer diameter of the indicating cover 11 is slightly smaller than the inner diameter of the indicator 10. Since the indicating cover 11 is close to the scale line, it is convenient for the staff to read the value, which helps to reduce the measurement error caused by inaccurate reading.

[0032] The housing may further include a guide sleeve 12. The guide sleeve 12 is generally in a columnar structure. The guide sleeve 12 is installed on the valve body 1, and can be sealed with the valve body 1 through gasket sealing, thread sealing, welding sealing, etc., which is not limited here. As an example, a first seal 13 is extruded between the guide sleeve 12 and the valve body 1, and the first seal 13 can prevent gas from escaping from the gap between the valve body 1 and the guide sleeve 12. The guide sleeve 12 is axially provided with a shaft hole for the feedback rod 4 to pass through. The movement of the feedback rod 4 can be guided through the shaft hole of the guide sleeve 12, so that the feedback rod 4 always moves along a predetermined path, reducing the measurement error caused by the position deviation of the feedback rod 4. In addition, a second seal 14 is sleeved on the feedback rod 4, and the second seal 14 is received in the guide sleeve 12. The second seal 14 can prevent gas from escaping from the shaft hole of the guide sleeve 12.

[0033] The first seal 13 and the second seal 14 in this embodiment can be made of nitrile rubber, polyurethane rubber or fluororubber, which is not limited here.

[0034] The elastic member 9 is used to drive the feedback rod 4 to reset after the bleed valve is closed, so that the backing plate 7 completely seals the gas inlet of the housing. The material of the elastic member 9 can be an organic material, such as a polymer resin material and other materials with certain flexibility. The elastic member 9 can also be a hollow spiral spring structure made of carbon steel, which is not limited here. The number of elastic members 9 can be one or more. It can be understood that when there is only one elastic member 9, the elastic member 9 is sleeved on the feedback rod 4 to better control the balance of the feedback rod 4.

[0035] The backing plate 7 is used to seal the gas inlet of the housing, and it needs to have good elasticity and sealing performance. The material of the backing plate 7 can be nitrile rubber, polyurethane rubber or fluororubber, which is not limited here.

[0036] The warning device may further include a control unit, a sensing component and a warning device.

[0037] The induction component is used to detect the position change of the feedback rod 4. The induction component includes a Hall sensor 8 and a magnetic component 6. The Hall sensor 8 is arranged on the housing. The Hall sensor 8, also known as a Hall effect sensor, is a transducer that can convert a changing magnetic field into a change in output voltage. The Hall sensor 8 is suitable for measuring magnetic fields and can also measure physical quantities that generate and affect magnetic fields. The magnetic component 6 is arranged on the feedback rod 4. The magnetic component 6 can be made of a permanent magnet material, such as a magnet or a permanent magnetic steel. When the feedback rod 4 moves, the distance between the magnetic component 6 and the Hall sensor 8 changes, and the magnetic field of the magnetic component 6 measured by the Hall sensor 8 also changes accordingly. Therefore, the opening and closing state of the blow-off valve can be judged by the change in the magnetic field measured by the Hall sensor 8.

[0038] The control unit is electrically connected to the induction component to control the warning device. The control unit can judge the opening and closing state of the blow-off valve according to the position change of the feedback rod 4, so that when the blow-off valve is in the closed state, the warning device is closed, and when the blow-off valve is in the open state, the warning device is turned on to emit a warning signal. The control unit can be automatically controlled or operated through a client, and is communicatively connected to the client. The client is used to operate the warning device to emit a warning signal or receive the warning signal emitted by the warning device. The client can communicate with an electronic device via communication methods such as WiFi, Bluetooth, and NFC. The client can be a portable terminal such as a tablet terminal or a wearable terminal, or a fixed terminal such as a personal computer, which is not limited here.

[0039] The warning device is used to emit a warning signal. The warning device can be a buzzer, an indicator light, etc., which is not limited here. After the warning device emits an alarm signal, the staff can check the position of the feedback rod 4 in the indicator 10 to manually confirm the current state of the blow-off valve, which helps to timely detect the failure of the blow-off valve, avoid energy waste, and improve the safety and reliability of the equipment.

[0040] In summary, for the blow-off valve warning device proposed in this embodiment, on the one hand, it can be connected to the blow-off valve through a pipeline. Since the structure of the original pressure regulating equipment does not need to be adjusted, the maintenance cost is relatively low. On the other hand, the opening state of the current blow-off valve can be determined by observing the position of the feedback rod in the indicator, making it easier for the staff to maintain the blow-off valve. On the other hand, the overall structure of the blow-off valve warning device is compact, occupies extremely small space, is convenient for installation and maintenance, has no requirements for the valve structure, can be applied to more scenarios, and has a wide application range. Finally, through the induction component, the position change of the feedback rod can be detected, and the opening and closing state of the blow-off valve can be judged accordingly, realizing the real-time monitoring of the opening and closing state of the blow-off valve, which helps to timely detect the failure of the blow-off valve and avoid the problem of energy waste caused by the failure of the blow-off valve.

[0041] It should be noted that the above embodiments can be freely combined as needed. The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A relief valve early warning device, characterized in that: include: a housing having a gas inlet and a gas outlet; An indicating assembly, the indicating assembly comprising a feedback rod, a backing plate, an elastic member and an indicator; The feedback rod is slidably connected to the shell, and the two axial ends of the feedback rod are respectively located in the shell and the indicator, and a spring seat is formed on the feedback rod; the pad is installed at one end of the feedback rod located in the shell, and is used to seal the gas inlet; the elastic member is telescopically arranged between the shell and the spring seat; the indicator is installed on the shell, and the indicator has a moving channel for the feedback rod to pass through, and the moving channel is at least partially transparent.

2. The relief valve warning device according to claim 1 is characterized in that: The outer side surface of the indicator is provided with a plurality of scales, and the plurality of scales extend along the axial direction of the feedback rod.

3. The relief valve warning device according to claim 1 is characterized in that: The shell comprises a valve body and a valve seat, the valve seat is provided with the gas inlet, the valve body is mounted on the valve seat, the valve body is connected with an outlet joint, and the outlet joint is provided with the gas outlet.

4. The relief valve warning device according to claim 3 is characterized in that: The housing further comprises a guide sleeve which is mounted on the valve body and has an axial hole which cooperates with the feedback rod.

5. The relief valve warning device according to claim 4 is characterized in that: A first sealing member is squeezed between the guide sleeve and the valve body.

6. The relief valve warning device according to claim 4 is characterized in that: The feedback rod is sleeved with a second sealing member, and the second sealing member is accommodated in the guide sleeve.

7. The relief valve warning device according to claim 1 is characterized in that: It also includes a control unit, a sensing component and an early warning device. The sensing component includes a Hall sensor and a magnet. The Hall sensor is arranged on the shell, and the magnet is arranged on the feedback rod. The Hall sensor and the early warning device are electrically connected to the control unit.

8. The relief valve warning device according to claim 7 is characterized in that: It also includes a client, which is electrically connected to the control unit.

9. The relief valve warning device according to claim 1, characterized in that: The feedback rod is sleeved with an indication cover, and the indication cover is located in the indicator.

10. The relief valve warning device according to claim 9, characterized in that: The outer diameter of the indicating cover is smaller than the inner diameter of the indicator.

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