Valve opening and closing system for natural gas pipeline leakage treatment

Abstract

The utility model relates to the technical field of natural gas pipeline leakage treatment, and discloses a valve opening and closing system for natural gas pipeline leakage treatment, which comprises a shell fixedly mounted on a pipeline, and an electric actuator, a sensor module, a control module and a power supply module for providing electric energy for the valve opening and closing system are mounted in the shell. The electric actuator and the sensor module are both electrically connected with the control module. The switching plate is arranged, the first motor drives the switching plate to rotate forwards and backwards, automatic switching between the manual driving assembly and the electric driving assembly is achieved, the two modes drive the valve to close or open a natural gas pipeline, and the safety redundancy design requirement for pipeline transportation of natural gas is met; and meanwhile, when the automatic valve is adopted, a manual operation function is realized.

Description

Technical Field

[0001] This utility model relates to the field of natural gas pipeline leakage handling technology, and in particular to a valve switching system for natural gas pipeline leakage handling. Background Technology

[0002] Pipeline natural gas transportation is an efficient, safe, and economical method because it can continuously and uninterruptedly transport large quantities of natural gas over long distances to meet industrial and residential needs. However, pipeline natural gas transportation also carries certain risks, such as pipeline aging, corrosion, welding defects, third-party sabotage, and natural disasters, all of which can lead to leaks. Once a leak occurs, it not only causes significant economic losses but also results in severe environmental pollution. Therefore, it is crucial to prioritize and effectively monitor and address pipeline leaks to ensure the safety of natural gas transportation.

[0003] In existing technologies, valves are typically opened and closed manually or electrically. A single opening and closing mode cannot meet the safety redundancy design requirements for pipeline transportation of natural gas.

[0004] Therefore, it is necessary to solve the above problems by using a valve switching system for handling natural gas pipeline leaks. Utility Model Content

[0005] The purpose of this invention is to provide a valve switching system for handling natural gas pipeline leaks, in order to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a valve switching system for handling natural gas pipeline leaks, comprising a housing fixedly installed on the pipeline, wherein an electric actuator, a sensor module, a control module, and a power supply module for providing power to the valve switching system are installed inside the housing; the electric actuator and the sensor module are both electrically connected to the control module; the electric actuator includes a rotating shaft and a Hall effect sensor, the rotating shaft being arranged radially along the pipeline and rotatably connected to the pipeline; the rotating shaft is fixedly connected to a valve inside the pipeline, the Hall effect sensor is installed inside the housing, and a radial magnetic ring corresponding to the Hall effect sensor is fixedly sleeved on the rotating shaft; a docking component is fixedly installed at the end of the rotating shaft away from the valve; a first motor is fixedly installed on the housing, and a conversion plate is rotatably installed on the output shaft of the first motor; a first mounting seat and a second mounting seat are slidably installed on the conversion plate, a hand drive assembly is installed on the first mounting seat, and an electric drive assembly is installed on the second mounting seat; a docking drive assembly is provided inside the housing to drive the hand drive assembly and the electric drive assembly to dock with the docking component, and the docking drive assembly is drively connected to the output shaft of the first motor; the Hall effect sensor, the first motor, and the electric drive assembly are all electrically connected to the control module.

[0007] Preferably, the docking component includes a first toothed disc; the first toothed disc includes a disc and a plurality of teeth, the disc is coaxially and fixedly connected to the end of the rotating shaft away from the valve, and the plurality of teeth are evenly distributed along the circumference of the disc at the end of the disc away from the rotating shaft.

[0008] Preferably, the hand drive assembly includes a shaft, which is rotatably connected to a first mounting base; one end of the shaft is coaxially fixedly connected to a handwheel, and the other end is coaxially connected to a second chuck, which is the same as the first chuck; the second chuck and the first chuck are coaxially engaged and transmission-fitted.

[0009] Preferably, the second geared disc is rotatably connected to the shaft, and a first torsion spring is provided between the second geared disc and the shaft, with the first torsion spring sleeved on the shaft; one end of the first torsion spring is fixedly connected to the second geared disc, and the other end is fixedly connected to the shaft; a transmission block is fixedly provided on the shaft, and an arc-shaped clearance groove is formed on the circumferential side of the disc of the second geared disc; the transmission block is slidably disposed in the clearance groove, and the transmission block abuts and engages with the second geared disc; rotational damping is provided at the connection between the rotating shaft and the pipe.

[0010] Preferably, the electric drive assembly includes a second motor, which is fixedly mounted on a second mounting base; a third chuck, identical to the first chuck, is coaxially connected to the output shaft of the second motor; the third chuck is coaxially engaged with and drives the first chuck; and the second motor is electrically connected to the control module.

[0011] Preferably, a micro switch is fixedly installed inside the housing, and the micro switch is electrically connected to the control module; an annular protrusion is fixedly sleeved on the rotating shaft, and the protrusion of the annular protrusion cooperates with the micro switch.

[0012] Preferably, the docking drive assembly includes a rotating plate, which is fixedly mounted on the output shaft of the first motor, and a second torsion spring is fixedly disposed between the rotating plate and the conversion plate; a first mounting base is fixedly connected to a first slide rod, and a second mounting base is fixedly connected to a second slide rod; two inclined slide grooves are formed on the rotating plate, the first slide rod is inserted into one of the inclined slide grooves and engages with the inclined slide groove in a transmission cooperation, and the second slide rod is inserted into the other inclined slide groove and engages with the inclined slide groove in a transmission cooperation; two stops are fixedly disposed inside the housing, and the two stops are staggered; two protrusions are fixedly disposed on the conversion plate, and the two protrusions correspond one-to-one with the two stops, with each protrusion engaging with the corresponding stop in a rotation-limiting cooperation.

[0013] Preferably, a limiting slider is fixedly provided between the first slide rod and the first mounting base, and between the second slide rod and the second mounting base; each limiting slider is limited and slidably engaged with the conversion plate, and a return spring is fixedly provided between each limiting slider and the conversion plate.

[0014] Preferably, an encoder is installed inside the housing, and a mounting plate is fixedly disposed inside the housing; the encoder sensor is fixedly disposed on the mounting plate, and the encoder code disk is fixedly sleeved on the rotating shaft; the encoder sensor is electrically connected to the control module.

[0015] The technical effects and advantages of this utility model are as follows:

[0016] First, this utility model is equipped with a conversion plate, which is driven to rotate forward and backward by a first motor to realize the automatic switching between the manual drive component and the electric drive component. The two modes drive the valve to close or open the natural gas pipeline, which meets the safety redundancy design requirements for pipeline transportation of natural gas: the valve can be automatic or manual, and when an automatic valve is used, it should also have a manual operation function.

[0017] Secondly, this utility model can automatically close the corresponding valves through the control module and electric actuator when a natural gas pipeline leak is detected, thereby improving the safety of natural gas pipeline operation. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a schematic half-sectional view of the present invention;

[0020] Figure 3 This is a partial schematic diagram of the rotating shaft of this utility model;

[0021] Figure 4 This is a schematic diagram of the interior of the casing of this utility model;

[0022] Figure 5 This is a schematic diagram of the manual drive assembly and the electric drive assembly of this utility model;

[0023] Figure 6 This is a schematic diagram of the first mounting base of this utility model;

[0024] Figure 7 This is a schematic diagram of the second toothed disc of this utility model;

[0025] Figure 8 This is a cross-sectional view of the limiting slider of this utility model.

[0026] In the diagram: 1. Pipe; 2. Housing; 3. Mounting plate; 4. Rotating shaft; 5. First chuck; 6. Valve; 7. Encoder; 8. Fixing plate; 9. Hall effect sensor; 10. Ring protrusion; 11. Micro switch; 12. First motor; 13. Output shaft; 14. Rotating plate; 15. Arc-shaped storage groove; 16. Angled slide groove; 17. Conversion plate; 18. First protrusion; 19. Second protrusion; 20. First limiting slide groove ; 21. Second limiting slide groove; 22. First mounting base; 23. Second mounting base; 24. Limiting slider; 25. First slide rod; 26. Second slide rod; 27. First spring; 28. Second spring; 29. ​​Shaft; 30. Handwheel; 31. Second chuck; 32. Second motor; 33. Third chuck; 34. Clearance groove; 35. Transmission block; 36. First stop block; 37. Second stop block; 38. Through groove. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0028] This utility model provides, for example Figures 1 to 8 The illustrated valve switching system for handling natural gas pipeline leaks includes a housing 2 fixedly mounted on the pipeline 1. The housing 2 houses an electric actuator, a sensor module, a control module, and a power supply module that provides power to the valve switching system. The control module is composed of a microcomputer. The sensor module is used to acquire the raw signal of pipeline leak vibration and noise, and to preprocess the leak vibration and noise to obtain a preprocessed signal. All of the above are prior art and will not be described in detail here.

[0029] Both the electric actuator and the sensor module are electrically connected to the control module.

[0030] The electric actuator includes a rotating shaft 4 and a Hall effect sensor 9. The rotating shaft 4 is arranged radially along the pipe 1 and rotatably connected to the pipe 1. The rotating shaft 4 is fixedly connected to a valve 6 inside the pipe 1. The Hall effect sensor 9 is installed inside the housing 2, and a radial magnetic ring corresponding to the Hall effect sensor 9 is fixedly sleeved on the rotating shaft 4 to measure the rotation angle position of the valve 6.

[0031] A docking component is fixedly installed on the end of the rotating shaft 4 away from the valve 6. The docking component includes a first toothed disc 5. The first toothed disc 5 includes a disc and multiple teeth. The disc is coaxially and fixedly connected to the end of the rotating shaft 4 away from the valve 6. The multiple teeth are evenly distributed along the circumference of the disc at the end of the disc away from the rotating shaft 4.

[0032] A first motor 12 is fixedly mounted on the housing 2. The output shaft 13 of the first motor 12 is perpendicular to the rotating shaft 4 and arranged radially along the rotating shaft 4. A conversion plate 17 is rotatably mounted on the output shaft 13 of the first motor 12. The conversion plate 17 is a right-angled plate, and the intersection of the two straight plates is rotatably mounted on the output shaft 13 of the first motor 12.

[0033] A first limiting groove 20 with a cross-shaped cross section is formed on one of the straight plates of the conversion plate 17. The first limiting groove 20 is a through groove and a matching limiting slider 24 is internally limited and slidably engaged. The limiting slider 24 is fixedly connected to the first mounting base 22. A hand drive assembly is mounted on the first mounting base 22, and the hand drive assembly is engaged with the docking part for transmission.

[0034] The hand-drive assembly includes a shaft 29, which is rotatably connected to a first mounting base 22. One end of the shaft 29 is coaxially fixedly connected to a handwheel 30, and the other end is coaxially connected to a second gear plate 31, which is identical to the first gear plate 5. The second gear plate 31 and the first gear plate 5 are coaxially engaged and transmission-operated.

[0035] The second geared disc 31 is rotatably connected to the shaft 29. A first torsion spring is installed between the second geared disc 31 and the shaft 29, and is sleeved on the shaft 29. One end of the first torsion spring is fixedly connected to the second geared disc 31, and the other end is fixedly connected to the shaft 29. A transmission block 35 is fixedly installed on the shaft 29. An arc-shaped clearance groove 34 is formed circumferentially on the disc of the second geared disc 31. The transmission block 35 is slidably disposed within the clearance groove 34, and engages in abutment with the second geared disc 31 for transmission.

[0036] Rotational damping is provided at the connection between the rotating shaft 4 and the pipe 1. When the rotating shaft 4 is not subjected to external force, the rotating shaft 4 and the valve 6 remain unchanged. When the second toothed disc 31 is coaxially connected with the first toothed disc 5, the torsional force of the first torsion spring is much smaller than the resistance of the rotational damping on the rotating shaft 4, so that the rotating shaft 4 and the valve 6 remain unchanged.

[0037] An arc-shaped through groove 38 is opened on the housing 2 along the circumference of the output shaft 13 of the first motor 12, and the shaft 29 passes through the through groove 38 and slides with the housing 2.

[0038] A second limiting groove 21 with a cross-shaped cross section is opened on another straight plate of the conversion plate 17. The second limiting groove 21 is also a through groove and has a matching limiting slider 24 inside for limiting sliding. This limiting slider 24 is fixedly connected to the second mounting base 23. The electric drive assembly is installed on the second mounting base 23, and the electric drive assembly is connected and driven by the docking part.

[0039] The electric drive assembly includes a second motor 32, which is fixedly mounted on a second mounting base 23. A third gear plate 33, identical to the first gear plate 5, is coaxially connected to the output shaft of the second motor 32. The third gear plate 33 is coaxially engaged with and drives the first gear plate 5.

[0040] Both the first limiting slide groove 20 and the second limiting slide groove 21 are provided with a return spring, wherein the return spring located in the first limiting slide groove 20 is the first spring 27, and the return spring located in the second limiting slide groove 21 is the second spring 28.

[0041] Both the first motor 12 and the second motor 32 are electrically connected to the control module, and both the first motor 12 and the second motor 32 are permanent magnet synchronous motors.

[0042] The housing 2 houses a docking drive assembly that drives the hand drive assembly and the electric drive assembly to dock with the docking parts. The docking drive assembly is connected to the output shaft 13 of the first motor 12 and also engages with the two limit sliders 24.

[0043] The docking drive assembly includes a rotating plate 14, which is identical to and parallel to the conversion plate 17. The two straight plates of the rotating plate 14 correspond one-to-one with the two straight plates of the conversion plate 17. The rotating plate 14 is fixedly connected to the output shaft 13 of the first motor 12. A second torsion spring is fitted onto the output shaft 13 of the first motor 12; one end of the second torsion spring is fixedly connected to the rotating plate 14, and the other end is fixedly connected to the conversion plate 17.

[0044] Each of the two straight plates of the rotating plate 14 has an inclined slide groove 16 and an arc-shaped storage groove 15, which are smoothly connected. Each arc-shaped storage groove 15 is circumferentially formed along the output shaft 13 of the first motor 12. A first slide rod 25 is fixedly mounted on the limiting slider 24 connected to the first mounting base 22, and a second slide rod 26 is fixedly mounted on the limiting slider 24 connected to the second mounting base 23. The first slide rod 25 is inserted into one of the connected inclined slide grooves 16 and arc-shaped storage grooves 15 and simultaneously engages with the inclined slide groove 16 and arc-shaped storage groove 15 in a limiting sliding engagement. The second slide rod 26 is inserted into the other connected inclined slide groove 16 and arc-shaped storage groove 15 and simultaneously engages with the inclined slide groove 16 and arc-shaped storage groove 15 in a limiting sliding engagement.

[0045] The rotating plate 14 abuts and engages with the first slide rod 25 and the second slide rod 26 to drive the first slide rod 25 and the second slide rod 26 to slide along the inclined slide groove 16.

[0046] Two staggered stops are fixedly installed inside the housing 1, one being the first stop 36 and the other the second stop 37. A protrusion is welded to each of the two straight plates of the conversion plate 17. The protrusion on the straight plate where the first mounting base 22 is located is the first protrusion 18, and the protrusion on the straight plate where the second mounting base 23 is located is the second protrusion 19. The first protrusion 18 and the second protrusion 19 are located on different circumferential planes. The first protrusion 18 abuts against the first stop 36, limiting its movement, and the second protrusion 19 abuts against the second stop 37, limiting its movement.

[0047] A mounting plate 3 is fixedly installed inside the housing 2. The mounting plate 3 is in the shape of an inverted U. The end of the rotating shaft 4 away from the valve 6 passes through the mounting plate 3 and is rotatably connected to the mounting plate 3.

[0048] Mounting plate 8 is fixedly mounted on mounting plate 3, and Hall effect sensor 9 is fixedly mounted on mounting plate 8.

[0049] An encoder 7 and a micro switch 11 are installed inside the housing 2. The sensor of the encoder 7 is electrically connected to the control module. The code disk of the encoder 7 is fixedly mounted on the rotating shaft 4. The sensor of the encoder 7 is fixedly connected to the mounting plate 3, and the sensor of the encoder 7 is positioned opposite to the code disk. The encoder 7 is used for position feedback.

[0050] The micro switch 11 is fixedly mounted on the mounting plate 8 and corresponds to the fully open and fully closed positions of the valve 6. The micro switch 11 is electrically connected to the control module. An annular protrusion 10 is fixedly sleeved on the rotating shaft 4. The annular protrusion 10 includes a ring body and two protrusions fixed on the ring body. The two protrusions are symmetrically arranged and rotate in contact with the micro switch 11. When the protrusions of the annular protrusion 10 rotate to the fully open and fully closed positions of the valve 6, they touch the micro switch 11. The micro switch 11 sends a signal to the control module, and the control module thereby shuts down the second motor 32.

[0051] Working principle: The sensor module acquires the raw signal of leakage vibration noise in pipeline 1, and preprocesses the leakage vibration noise to obtain the preprocessed signal.

[0052] After acquiring the raw signal of the leakage vibration noise of pipeline 1, the sensor module performs preprocessing. The preprocessing of the raw signal includes the following steps.

[0053] Step S1: Perform empirical mode decomposition (EMD) on the original signal of pipeline leakage vibration noise to decompose it into intrinsic mode functions (IMF).

[0054] Step S2: Perform wavelet denoising on the Intrinsic Mode Function (IMF) obtained in Step S1 using the db wavelet basis function to obtain the preprocessed signal.

[0055] After receiving the signal that has undergone preprocessing operations such as noise reduction, the preprocessed signal is sent to the control module.

[0056] After receiving the signal from the sensor module, the control module makes a judgment based on the preset logic.

[0057] The control module receives signals from the sensors and determines whether valve 6 needs to be closed based on preset logic. This preset logic includes a multi-level judgment mechanism to ensure the accuracy and reliability of the system. First, the system sets multiple leakage warning thresholds, judges the degree of leakage based on sensor data, and triggers the corresponding level of response. Simultaneously, the system evaluates the duration of the leakage signal; the closure operation is only performed if the signal persists for more than a preset time (e.g., 30 seconds) to avoid erroneous operation due to short-term fluctuations.

[0058] To further improve accuracy, the system employs a multi-point data cross-validation mechanism, requiring at least two sensor modules to alarm simultaneously before triggering a shutdown operation. Furthermore, the system analyzes the rate of pressure change and abnormal flow variations in pipeline 1, combining this data to comprehensively assess the leakage situation. Considering the influence of environmental factors, the system adjusts its judgment criteria based on conditions such as temperature and humidity to avoid misjudgments caused by extreme weather.

[0059] After the control module completes its judgment, it sends the result to the electric actuator. The electric actuator receives the command from the control module and guides the second motor 32 to drive the valve 6 to open or close according to the command. At this time, the valve 6 is in an electrically driven state. The third toothed disc 33 is coaxially engaged with the first toothed disc 5.

[0060] The specific process is as follows: the control module controls the second motor 32 to start, the output shaft of the second motor 32 drives the third toothed disc 33 to rotate, the third toothed disc 33 pushes the first toothed disc 5 to rotate, the first toothed disc 5 drives the rotating shaft 4 to rotate, and the rotating shaft 4 drives the valve 6 to block or open the pipeline.

[0061] During the rotation of shaft 4, the encoder disk of encoder 7 and the radial magnetic ring of Hall effect sensor 9 rotate synchronously, thereby measuring the rotation angle of shaft 4 and determining the rotation position of valve 6 through the control module. Hall effect sensor 9 is used to detect the position of valve 6, providing accurate feedback signals to the control unit. Its high sensitivity and high reliability ensure accurate position data under various operating conditions. Feedback on the rotation position of valve 6 through encoder 7 improves the stability of valve opening and closing position control in each operation.

[0062] The control module employs an optimized PID (Proportional-Integral-Derivative) control algorithm to achieve precise on / off control of natural gas pipeline valve 6. This algorithm generates appropriate motor control signals by calculating the error between the target position and the current position in real time. Its core formula is:

[0063] ;

[0064] in To control the output, For error signals, , and These are the proportional, integral, and derivative gains, respectively. Proportional control ( Setting between 1.5 and 3.0 provides a fast initial response; integral control ( Set between 0.2 and 0.5) to eliminate steady-state error and ensure the valve can be fully closed or opened; differential control ( The value is set between 0.1 and 0.3 to predict the trend of error changes and improve the dynamic response of the system. Considering the sensitivity of differential control to noise, the system processes the differential signal with a low-pass filter with a cutoff frequency of about 10Hz to reduce the influence of high-frequency noise. At the same time, an anti-integral saturation mechanism is implemented to prevent overshoot by limiting the maximum value of the integral term (usually 20% of the output range), which is mathematically expressed as:

[0065] ;

[0066] in To control the maximum value of the output.

[0067] To improve safety, the position feedback uses a high-precision encoder with a resolution of ≤0.1°, and redundant microswitches 11 are provided in the fully open and fully closed positions.

[0068] When valve 6 is rotated to the fully open and fully closed positions, the rotating shaft 4 drives the protrusion on the annular protrusion 10 to touch the micro switch 11, thereby shutting down the second motor 32 through the control module.

[0069] During the operation of the aforementioned sensor module, control module, and electric actuator, the power supply module provides the necessary electrical energy to the sensor module, control module, and electric actuator.

[0070] By coordinating the sensor module, control module, power supply module, and electric actuator, the system automatically shuts off valve 6 when pipeline 1 leaks. The system responds quickly upon detecting a leak signal, avoiding delays and operational errors associated with manual intervention, and reducing economic losses and environmental pollution caused by leaks.

[0071] When manual closure of the valve is required, valve 6 needs to be switched from electric drive to manual drive.

[0072] The conversion process between manual and electric drive of valve 6 is as follows: First, electric drive is the initial drive, that is, the third toothed disc 33 is coaxially engaged with the first toothed disc 5. At this time, the second slide rod 26 is located at the end of the inclined slide groove 16 near the pipe 1, and the first slide rod 25 is located at the end of the arc-shaped receiving groove 15 away from the pipe 1. The limiting slider 24 in the second limiting slide groove 21 compresses the second spring 28, the rotating plate 14 and the conversion plate 17 are misaligned, and the second torsion spring between the rotating plate 14 and the conversion plate 17 twists. The second protrusion 19 abuts against the second stop 37.

[0073] When switching from electric to manual drive, the first motor 12 is started. The output shaft 13 of the first motor 12 rotates, causing the rotating plate 14 and the conversion plate 17 to gradually rotate and align. During this process, the conversion plate 17 pushes the second slide rod 26 to slide radially away from the pipe 1 within the inclined slide groove 16. The second slide rod 26 causes the connected limiting slider 24 to slide radially away from the pipe 1 within the second limiting slide groove 21. The limiting slider 24 within the second limiting slide groove 21 causes the second mounting base 23 to move radially away from the pipe 1. The second mounting base 23 causes the second motor 32 to move synchronously away from the pipe 1, and the output shaft of the second motor 32 causes the third toothed disc 33 to gradually move away from the first toothed disc 5 until it disengages from the first toothed disc 5.

[0074] After the third toothed disc 33 disengages from the first toothed disc 5, the second slide rod 26 slides to the connection point between the inclined slide groove 16 and the arc-shaped storage groove 15, while the first slide rod 25 slides to the connection point between the inclined slide groove 16 and the arc-shaped storage groove 15. The second torsion spring between the rotating plate 14 and the conversion plate 17 returns to its natural state.

[0075] As the output shaft 13 of the first motor 12 continues to rotate, the rotating plate 14 pulls the conversion plate 17 to rotate synchronously via the second torsion spring between it and the conversion plate 17. During this process, the conversion plate 17 simultaneously drives the first protrusion 18 to rotate closer to the first stop 36 and drives the second protrusion 19 to rotate away from the second stop 37. At the same time, the conversion plate 17 drives the first mounting base 22 and the second mounting base 23 to rotate synchronously, and the first mounting base 22 drives the shaft 29, and the second mounting base 23 drives the second motor 32 to revolve synchronously around the output shaft 13.

[0076] After the first protrusion 18 contacts the first stop 36, the second toothed disc 31 is positioned directly above the first toothed disc 5, i.e., coaxially opposite. Then, the conversion plate 17 stops rotating, and the output shaft 13 of the first motor 12 continues to drive the rotating plate 14 to rotate, causing the second torsion spring between the rotating plate 14 and the conversion plate 17 to twist. The rotating plate 14 pushes the first slide rod 25 to slide radially along the pipe 1 within the inclined slide groove 16, approaching the pipe 1, while the second slide rod 26 slides along the arc-shaped receiving groove 15.

[0077] As the first slide rod 25 slides closer to the pipe 1, it drives the connected limiting slider 24 to slide radially closer to the pipe 1 within the first limiting groove 20. At this time, the limiting slider 24 drives the first mounting base 22 to move synchronously and compress the first spring 27. The first mounting base 22 drives the shaft 29 to move synchronously, and the shaft 29 drives the second toothed disc 31 to move closer to the first toothed disc 5.

[0078] When the second toothed disc 31 contacts the first toothed disc 5, if the teeth of the first toothed disc 5 misalign with the teeth of the second toothed disc 31, the teeth of the first toothed disc 5 will push the teeth of the second toothed disc 31 to revolve around the central axis of the shaft 29. At this time, the teeth of the second toothed disc 31 will drive the second toothed disc 31 to rotate, and the second toothed disc 31 will twist the first torsion spring between itself and the shaft 29.

[0079] When the second toothed disc 31 and the first toothed disc 5 are fully engaged, the first slide rod 25 slides to the end of the inclined slide groove 16 near the pipe 1, and the second slide rod 26 slides to the end of the arc-shaped receiving groove 15 away from the pipe 1. At the same time, the rotating plate 14 and the conversion plate 17 are misaligned again, and the first motor 12 is turned off.

[0080] Then, by rotating the handwheel 30, the handwheel 30 drives the shaft 29, which in turn drives the second chuck 31, which in turn drives the first chuck 5 to rotate. The first chuck 5 drives the rotating shaft 4 to rotate, which in turn drives the valve 6 to open or close the pipe 1.

[0081] During the transition from manual to electric drive, the first motor 12 is restarted, and the output shaft 13 of the first motor 12 reverses the direction of the transition from electric to manual drive. The output shaft 13 of the first motor 12 then rotates, causing the rotating plate 14 and the conversion plate 17 to gradually rotate and align. During this process, the conversion plate 17 pushes the first slide rod 25 to slide radially away from the pipe 1 within the inclined groove 16. The first slide rod 25 causes the connected limiting slider 24 to slide radially away from the pipe 1 within the first limiting groove 20. The limiting slider 24 within the first limiting groove 20 causes the first mounting base 22 to move radially away from the pipe 1. The first mounting base 22 causes the shaft 29 to move synchronously away from the pipe 1, and the shaft 29 causes the second toothed disc 31 to gradually move away from the first toothed disc 5 until it disengages from the first toothed disc 5.

[0082] After the second toothed disc 31 disengages from the first toothed disc 5, the first slide rod 25 slides to the connection point between the inclined slide groove 16 and the arc-shaped storage groove 15, while the second slide rod 26 slides to the connection point between the inclined slide groove 16 and the arc-shaped storage groove 15. The second torsion spring between the rotating plate 14 and the conversion plate 17 returns to its natural state.

[0083] As the output shaft 13 of the first motor 12 continues to rotate, the rotating plate 14 pulls the conversion plate 17 to rotate synchronously via the second torsion spring between it and the conversion plate 17. During this process, the conversion plate 17 simultaneously drives the second protrusion 19 to rotate closer to the second stop 37, and drives the first protrusion 18 to rotate away from the first stop 36. At the same time, the conversion plate 17 drives the first mounting base 22 and the second mounting base 23 to rotate synchronously, and the first mounting base 22 drives the shaft 29, and the second mounting base 23 drives the second motor 32 to revolve synchronously around the output shaft 13.

[0084] After the second protrusion 19 contacts the second stop 37, the third toothed disc 33 is positioned directly above the first toothed disc 5, i.e., coaxially opposite. Then, the conversion plate 17 stops rotating, and the output shaft 13 of the first motor 12 continues to drive the rotating plate 14 to rotate, causing the second torsion spring between the rotating plate 14 and the conversion plate 17 to twist. The rotating plate 14 pushes the second slide rod 26 to slide radially along the pipe 1 within the inclined slide groove 16, approaching the pipe 1, and the second slide rod 26 slides along the arc-shaped receiving groove 15.

[0085] As the second slide rod 26 slides closer to the pipe 1, it drives the connected limiting slider 24 to slide radially closer to the pipe 1 within the second limiting groove 21. At this time, the limiting slider 24 drives the second mounting base 23 to move synchronously and compress the second spring 28. The second mounting base 23 drives the second motor 32 to move synchronously, and the output shaft of the second motor 32 drives the third toothed disc 33 to move closer to the first toothed disc 5.

[0086] When the third toothed disc 33 contacts the first toothed disc 5, if the teeth of the first toothed disc 5 and the teeth of the third toothed disc 33 misalign and abut, the teeth of the first toothed disc 5 will push the teeth of the third toothed disc 33 to revolve around the output shaft of the second motor 32. At this time, the teeth of the third toothed disc 33 will drive the output shaft of the second motor 32 to rotate.

[0087] When the third toothed disc 33 and the first toothed disc 5 are fully engaged, the second slide rod 26 slides to the end of the inclined slide groove 16 near the pipe 1, and the first slide rod 25 slides to the end of the arc-shaped receiving groove 15 away from the pipe 1. At the same time, the rotating plate 14 and the conversion plate 17 are misaligned again, and the first motor 12 is turned off.

[0088] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A valve switching system for handling natural gas pipeline leaks, comprising a housing (2) fixedly mounted on a pipeline (1), wherein an electric actuator, a sensor module, a control module, and a power supply module for providing power to the valve switching system are installed inside the housing (2); the electric actuator and the sensor module are both electrically connected to the control module; characterized in that: The electric actuator includes a rotating shaft (4) and a Hall effect sensor (9). The rotating shaft (4) is arranged radially along the pipe (1) and rotatably connected to the pipe (1). The rotating shaft (4) is fixedly connected to the valve (6) inside the pipe (1). The Hall effect sensor (9) is installed inside the housing (2). A radial magnetic ring corresponding to the Hall effect sensor (9) is fixedly sleeved on the rotating shaft (4). A connecting piece is fixedly installed at the end of the rotating shaft (4) away from the valve (6); The first motor (12) is fixedly installed on the housing (2), and the output shaft (13) of the first motor (12) is rotatably mounted on the conversion plate (17); the first mounting seat (22) and the second mounting seat (23) are slidably installed on the conversion plate (17), the first mounting seat (22) is mounted on the hand drive assembly, and the second mounting seat (23) is mounted on the electric drive assembly; The housing (2) is provided with a docking drive assembly that drives the hand drive assembly and the electric drive assembly to drive the docking parts. The docking drive assembly is connected to the output shaft (13) of the first motor (12). The Hall effect sensor (9), the first motor (12), and the electric drive assembly are all electrically connected to the control module.

2. The valve switching system for handling natural gas pipeline leaks according to claim 1, characterized in that: The docking component includes a first toothed disc (5); the first toothed disc (5) includes a disc and a plurality of teeth, the disc is coaxially fixedly connected to the end of the rotating shaft (4) away from the valve (6), and the plurality of teeth are evenly distributed along the circumference of the disc at the end of the disc away from the rotating shaft (4).

3. A valve switching system for handling natural gas pipeline leaks according to claim 2, characterized in that: The hand drive assembly includes a shaft (29), which is rotatably connected to a first mounting base (22); one end of the shaft (29) is coaxially fixedly connected to a handwheel (30), and the other end is coaxially connected to a second chuck (31) identical to the first chuck (5); the second chuck (31) and the first chuck (5) are coaxially engaged and in transmission cooperation.

4. A valve switching system for handling natural gas pipeline leaks according to claim 3, characterized in that: The second geared disc (31) is rotatably connected to the shaft (29), and a first torsion spring is provided between the second geared disc (31) and the shaft (29), with the first torsion spring sleeved on the shaft (29); one end of the first torsion spring is fixedly connected to the second geared disc (31), and the other end is fixedly connected to the shaft (29); a transmission block (35) is fixedly provided on the shaft (29), and an arc-shaped relief groove (34) is opened on the disc of the second geared disc (31) along the circumferential direction; the transmission block (35) is slidably disposed in the relief groove (34), and the transmission block (35) and the second geared disc (31) abut against each other for transmission cooperation; a rotational damping is provided at the connection between the rotating shaft (4) and the pipe (1).

5. A valve switching system for handling natural gas pipeline leaks according to claim 2, characterized in that: The electric drive assembly includes a second motor (32), which is fixedly mounted on a second mounting base (23); a third chuck (33) identical to the first chuck (5) is coaxially connected to the output shaft of the second motor (32); the third chuck (33) is coaxially engaged with the first chuck (5) and is in transmission cooperation; the second motor (32) is electrically connected to the control module.

6. A valve switching system for handling natural gas pipeline leaks according to claim 5, characterized in that: A micro switch (11) is fixedly installed inside the housing (2), and the micro switch (11) is electrically connected to the control module; an annular protrusion (10) is fixedly sleeved on the rotating shaft (4), and the protrusion of the annular protrusion (10) cooperates with the micro switch (11).

7. A valve switching system for handling natural gas pipeline leaks according to claim 2, characterized in that: The docking drive assembly includes a rotating plate (14), which is fixedly mounted on the output shaft (13) of the first motor (12). A second torsion spring is fixedly arranged between the rotating plate (14) and the conversion plate (17). The first mounting base (22) is fixedly connected to the first slide rod (25), and the second mounting base (23) is fixedly connected to the second slide rod (26). Two inclined slide grooves (16) are opened on the rotating plate (14). The first slide rod (25) is inserted into one of the inclined slide grooves (16) and is in transmission cooperation with the inclined slide groove (16). The second slide rod (26) is inserted into the other inclined slide groove (16) and is in transmission cooperation with the inclined slide groove (16). Two stops are fixedly arranged inside the housing (2). The two stops are staggered. Two protrusions are fixedly arranged on the conversion plate (17). The two protrusions correspond one-to-one with the two stops. Each protrusion abuts against the corresponding stop and limits rotation.

8. A valve switching system for handling natural gas pipeline leaks according to claim 7, characterized in that: A limiting slider (24) is fixedly provided between the first slide bar (25) and the first mounting base (22), and between the second slide bar (26) and the second mounting base (23); each limiting slider (24) is limited and slidably engaged with the conversion plate (17), and a reset spring is fixedly provided between each limiting slider (24) and the conversion plate (17).

9. A valve switching system for handling natural gas pipeline leaks according to claim 1, characterized in that: An encoder (7) is installed inside the housing (2), and a mounting plate (3) is fixedly installed inside the housing (2); the sensor of the encoder (7) is fixedly installed on the mounting plate (3), and the code disk of the encoder (7) is fixedly sleeved on the rotating shaft (4); the sensor of the encoder (7) is electrically connected to the control module.

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