Gas safety cut-off device

Abstract

The utility model provides a fuel gas safety cut-off device. The fuel gas safety cut-off device comprises a cut-off valve body, a pressing execution mechanism and a master controller. Wherein the cut-off valve body is communicated with a gas transmission and distribution pipeline, and a cut-off button is arranged on an operation surface of the cut-off valve body; the pressing executing mechanism is detachably arranged on the operation face of the stop valve body and comprises a motor driving module and a pressing piece, and the pressing piece is fixedly connected with an output shaft of the motor driving module and used for moving along with the output shaft after the motor driving module is started so as to automatically press the stop button; and the master controller is in signal connection or electrical connection with a controller of the motor driving module, and is used for controlling the motor driving module to drive the pressing piece to move, so that the remote cutting action of the gas transmission and distribution pipeline is realized. The pressing executing mechanism is independently arranged relative to the gas transmission and distribution pipeline, the remote cutting function can be achieved without depending on gas medium gas pressure, meanwhile, the remote control cutting function and the manual pressing cutting function are achieved, safety is high, the pressing executing mechanism can be suitable for gas transmission and distribution systems of different specifications, and practicability is high.

Description

Technical Field

[0001] This application relates to the field of gas safety device technology, and further to a gas safety shut-off device. Background Technology

[0002] As a safety accessory for gas pipeline projects, gas shut-off valves are mainly used to cut off the gas supply when the system pressure is abnormal, thus protecting downstream equipment.

[0003] In related technologies, gas shut-off valves typically employ manual press-to-shutdown or pneumatic overpressure automatic shut-off control methods. Of course, to ensure timely gas supply cut-off and reduce safety hazards in emergencies such as fires or earthquakes where personnel cannot reach the affected area, some gas shut-off valves also possess remote intelligent shut-off capabilities. However, most remotely controllable gas shut-off valves currently on the market still rely on the gas system's medium pressure for shut-off, requiring external venting during the process. This results in low safety and reliability, complex structures, and an inability to meet the application requirements of different gas transmission and distribution systems, limiting their applicability and necessitating improvement. Utility Model Content

[0004] The purpose of this application is to provide a gas safety shut-off device, which is set independently relative to the gas transmission and distribution pipeline, can realize remote shut-off function without relying on the gas medium pressure, has high safety, simple structure, and can be applied to gas transmission and distribution systems of different specifications, with good overall performance.

[0005] The technical solution provided in this application is as follows:

[0006] This application provides a gas safety shut-off device, comprising:

[0007] The shut-off valve body is connected to the gas transmission and distribution pipeline, and its operating surface is equipped with a shut-off button;

[0008] The pressing actuator is detachably mounted on the operating surface of the shut-off valve body, and includes a motor drive module and a pressing component; the pressing component is fixedly connected to the output shaft of the motor drive module and is used to move with the output shaft after the motor drive module is started to automatically press the shut-off button.

[0009] The main controller is connected to the controller of the motor drive module by signal or electrical connection, and is used to control the motor drive module to drive the pressing element to move, thereby realizing the remote cut-off action of the gas transmission and distribution pipeline.

[0010] The gas safety shut-off device provided in this application features a motor drive module and a pressing component on the operating surface of the shut-off valve body. After the main controller sends a start signal to the controller of the motor drive module, the motor drive module starts, and its output shaft drives the pressing component to press the shut-off button, remotely shutting off the gas transmission and distribution pipeline. Because the pressing actuator is detachable from the shut-off valve body, this gas safety shut-off device is independent of the gas transmission and distribution pipeline. This means the shut-off process does not rely on the gas medium pressure, and there is no need to release gas externally. The overall structure is simple, easy to install, and effectively improves the safety of the gas shut-off process. Furthermore, by installing the pressing actuator on shut-off valves of different specifications of gas transmission and distribution pipelines as needed, and then installing the gas safety shut-off device on the corresponding specifications of gas transmission and distribution pipelines, the remote shut-off needs of different gas transmission and distribution pipelines can be met without significant modifications to the original gas shut-off valves. This expands the applicability of the gas safety shut-off device while effectively reducing the cost investment for enterprises in remote shut-off of gas transmission and distribution pipelines, promoting energy conservation and efficiency, effectively ensuring the comprehensive performance of the gas safety shut-off device, and improving the user experience.

[0011] In some embodiments, a support plate is detachably mounted on the shut-off valve body for mounting the motor drive module;

[0012] The motor drive module includes a rotary electric actuator;

[0013] The housing of the angular stroke electric actuator is fixed to the support plate, and its output shaft extends to the side of the cut-off button in a direction perpendicular to the axis of the cut-off button;

[0014] The pressing element has a long, flat structure, extending perpendicularly to the output shaft of the angular stroke electric actuator. One end of the pressing element is detachably fixed to the output shaft of the angular stroke electric actuator so that it rotates synchronously when the output shaft rotates, and presses the cut-off button after its free end has rotated into position.

[0015] The gas safety shut-off device provided in this application utilizes the strong adaptability, high control precision, and strong repeatability of the angular stroke electric actuator system. The angular stroke electric actuator drives the pressing component to rotate, which helps ensure the reliable automatic pressing process of the shut-off button and guarantees the stability of the gas safety shut-off device's function. Simultaneously, the pressing component is designed as a long, flat structure, and the angular stroke electric actuator drives its rotation to achieve automatic pressing. The pressing mechanism is located on one radial side of the shut-off button, allowing the gas safety shut-off device to retain a manual shut-off function. Even when remote control fails, the shut-off button can still be manually pressed to cut off the gas transmission and distribution pipeline, helping to ensure the backup reliability of the gas safety shut-off device.

[0016] In some embodiments, the lugs are formed on the operating surface of the shut-off valve body and include multiple lugs;

[0017] The support plate is fixedly attached to the first end face of the shut-off valve body, with one end extending to the operating surface side of the shut-off valve body to install the motor drive module.

[0018] The plurality of ear seats are located on the operating surface of the shut-off valve body away from the first end face, and their installation direction is perpendicular to the first end face;

[0019] The support column includes multiple columns, each corresponding to one of the lugs; the two ends of the support column in the axial direction are respectively connected to the support plate and the corresponding lug, so that the support plate is fixedly pressed against the first end face;

[0020] The first end face is any end face of the operating surface of the shut-off valve body.

[0021] The gas safety shut-off device provided in this application uses a support column installed on the lug seat on the shut-off valve body. The support column is used to fix the support plate on the shut-off valve body, and the support plate is used to install the pressing actuator on the surface of the shut-off valve body. The gas safety shut-off device has a simple overall structure and is easy to install, which helps to further promote energy conservation and cost reduction for enterprises.

[0022] In some embodiments, the support column includes a first column and a second column, which are coaxially arranged, and the radial dimension of the second column is smaller than that of the first column;

[0023] The end of the first column facing away from the second column abuts against the support plate and is fixedly connected to the support plate by a flat-head bolt;

[0024] The end of the second column opposite to the first column passes through the corresponding ear seat until the end of the first column opposite to the support plate abuts against the corresponding end face of the ear seat;

[0025] A locking bolt is provided at the end of the second column located away from the support plate of the ear seat, and abuts against the corresponding end face of the ear seat.

[0026] In some embodiments, the support plate has a recessed groove on the side away from the support column, and the nut end of the flat-head bolt is embedded in the recessed groove, with its end face not higher than the opening end face of the recessed groove.

[0027] The gas safety shut-off device provided in this application has a flat-head bolt with the nut end embedded in a groove, so that the side of the support plate away from the support column remains flat, so that an angular stroke electric actuator can be installed at the corresponding position of the support plate.

[0028] In some embodiments, one end of the pressing member is formed with a sleeve, the axial direction of which is perpendicular to the extending direction of the pressing member;

[0029] The sleeve is fitted axially onto the output shaft end of the angular stroke electric actuator and is fixedly connected to the output shaft of the angular stroke electric actuator by a locking member.

[0030] The gas safety shut-off device provided in this application uses a sleeve structure to fix the pressing element to the output shaft of the angular stroke electric actuator. The two structures are simple and easy to connect, which helps to further reduce the production cost of the gas safety shut-off device.

[0031] In some embodiments, a protective cover is also included, which is detachably disposed on the operating surface of the shut-off valve body and is used to cover the pressing element and the shut-off button.

[0032] The gas safety shut-off device provided in this application has a protective cover covering the shut-off button and the pressing actuator. This helps reduce the probability of dust, water vapor, and other contaminants in the environment damaging the shut-off button and the pressing actuator, extending the service life of the gas safety shut-off device, and reducing the risk of accidental activation of the shut-off button. This significantly improves the stability of the gas safety shut-off device's function and ensures the safety of the corresponding gas transmission and distribution pipeline.

[0033] In some embodiments, a bracket is also included, disposed between the support plate and the operating surface of the shut-off valve body, to stably connect the support plate and the shut-off valve body.

[0034] In some embodiments, the support includes a first upright plate and a second upright plate, which are perpendicular to each other, and the support has an L-shaped structure;

[0035] During assembly, the first upright plate and the second upright plate are respectively attached to the operating surfaces of the corresponding support plate and the shut-off valve body, and are respectively fixedly connected to the corresponding support plate and the shut-off valve body through connectors.

[0036] The gas safety shut-off device provided in this application features an L-shaped support structure, which allows the protective cover to be stably installed on the surface of the shut-off valve body while simultaneously connecting the support plate to the shut-off valve body. This effectively enhances the structural strength of the gas safety shut-off device and further ensures the stability and reliability of its function.

[0037] In some embodiments, a flip hinge is provided between the protective cover and the shut-off valve body, with its first leaf fixedly connected to the protective cover and its second leaf fixedly connected to the second upright plate via a connector.

[0038] The gas safety shut-off device provided in this application utilizes a flip hinge to achieve a hinged connection between the protective cover and the shut-off valve body. The installation method of the protective cover is simple, and it is convenient to produce and use. This helps to ensure the production convenience of the gas safety shut-off device and promotes cost reduction and efficiency improvement for enterprises.

[0039] Compared with the prior art, the gas safety shut-off device provided in this application has at least one of the following advantages:

[0040] 1. This application utilizes a detachable pressing actuator on the surface of the shut-off valve body to remotely control the shut-off of gas transmission and distribution pipelines by automatically pressing the shut-off button. Since this gas safety shut-off device is independently installed relative to the gas transmission and distribution pipeline, the shut-off process does not rely on the gas medium pressure, nor does it require external gas discharge, resulting in high safety during the shut-off process. Furthermore, by installing the pressing actuator on shut-off valve bodies of different specifications according to actual application needs, and then installing the gas safety shut-off device on the corresponding gas transmission and distribution pipeline, the remote shut-off function for different gas transmission and distribution pipelines can be met without significant modifications to the original gas shut-off valve. This gas safety shut-off device has a wide range of applications, strong practicality, simple structure, and convenient installation, effectively reducing enterprise costs and promoting cost reduction and efficiency improvement.

[0041] 2. In this application, an angular stroke electric actuator is used to drive the pressing component to rotate, thereby realizing the automatic pressing action of the cut-off button. Since the pressing actuator is located on one side of the cut-off button in the radial direction, the gas safety cut-off device has both remote control cut-off and manual cut-off functions. When the remote control fails, the gas transmission and distribution pipeline can be cut off by manually pressing the cut-off button, which helps to ensure the backup reliability of the gas safety cut-off device. Attached Figure Description

[0042] The preferred embodiments will now be described in a clear and easy-to-understand manner, with reference to the accompanying drawings, to further explain the above-mentioned characteristics, technical features, advantages, and implementation methods of this solution.

[0043] Figure 1 This is an isometric schematic diagram of the main embodiment of the gas safety shut-off device in this application;

[0044] Figure 2 This is an isometric schematic diagram of the main structure of the shut-off valve body in the embodiments of this application;

[0045] Figure 3 This is a perspective view illustrating the arrangement of the pressing actuator in the embodiments of this application;

[0046] Figure 4 This is an isometric schematic diagram illustrating the main support installation method in the embodiments of this application;

[0047] Figure 5 This is an isometric schematic diagram illustrating the main installation position of the flat-head bolt in the embodiments of this application;

[0048] Figure 6 This is an isometric schematic diagram of the main structure of the support frame in the embodiments of this application.

[0049] Explanation of reference numerals in the attached figures:

[0050] 1. Shut-off valve body; 11. Operating face; 12. Shut-off button; 13. First end face; 14. Ear seat; 2. Pressing actuator; 21. Motor drive module; 22. Pressing component; 221. Sleeve; 3. Support plate; 31. Sink; 4. Support column; 41. First column; 411. Flat head bolt; 42. Second column; 421. Locking bolt; 5. Fastener; 6. Bracket; 61. First upright plate; 62. Second upright plate; 7. Connecting component; 8. Protective cover; 9. Flip hinge. Detailed Implementation

[0051] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the specific implementation methods of this application will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without creative effort.

[0052] To keep the drawings concise, each drawing only schematically shows the parts relevant to this application, and they do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one."

[0053] In gas transmission and distribution systems, gas shut-off valves serve as crucial safety protection devices. Their primary function is to cut off the gas supply and protect downstream equipment when system pressure is abnormal. Currently, existing gas shut-off valves in the industry typically employ manual press-to-shutdown, pneumatic overpressure automatic shut-off, and remote control shut-off methods. Manual shut-off requires personnel to be on-site to press the shut-off button, posing a significant safety hazard in emergencies such as fires or earthquakes where personnel cannot arrive promptly. While pneumatic overpressure automatic shut-off eliminates the need for manual intervention, it relies on the gas pressure within the gas system, resulting in low safety. Remotely controllable gas shut-off valves, although possessing remote shut-off capabilities, mostly still rely on the gas pressure within the gas system for shut-off, and the shut-off process requires external venting, leading to low reliability, complex structures, and limited applicability due to their inability to meet the application requirements of gas transmission and distribution systems across all sizes and pressure ranges.

[0054] For this, please refer to the accompanying drawings in the instruction manual. Figures 1 to 6 In one embodiment, a gas safety shut-off device is provided, including a shut-off valve body 1 and a pressing actuator 2. The shut-off valve body 1 is connected to a gas transmission and distribution pipeline, and its operating surface 11 is provided with a shut-off button 12. The pressing actuator 2 is detachably disposed on the operating surface 11 of the shut-off valve body 1, including a motor drive module 21 and a pressing element 22. The pressing element 22 is fixedly connected to the output shaft of the motor drive module 21. After the motor drive module 21 is started, the pressing element 22 moves with the output shaft of the motor drive module 21 to automatically press the shut-off button 12, thereby realizing the remote shut-off action of the gas transmission and distribution pipeline. A main controller is also included, which is signal- or electrically connected to the controller of the motor drive module 21 to control the opening and closing of the motor drive module 21, thereby controlling the movement of the pressing element 22.

[0055] In practical applications, users can install the pressing actuator 2 onto the shut-off valve body 1 of different specifications of gas transmission and distribution pipelines as needed, and then connect the corresponding shut-off valve body 1 to the corresponding specifications of gas transmission and distribution pipelines to meet the remote shut-off needs of different gas transmission and distribution pipelines. Since no major modifications to the original gas shut-off valve are required, the gas safety shut-off device is easy to manufacture and use, and has low cost; it can also meet the application needs of gas transmission and distribution systems of all sizes and pressure ranges, making it more widely applicable and practical; at the same time, its pressing actuator 2 is independently set relative to the gas transmission and distribution pipeline, so the shut-off process of the gas transmission and distribution pipeline does not rely on the gas medium pressure, and there is no need to release gas externally during the shut-off process, resulting in higher safety during the gas shut-off process, effectively ensuring the comprehensive performance of the gas safety shut-off device and improving the user experience.

[0056] In one embodiment, specifically based on the above embodiments. (Refer to...) Figure 2The axis of the cut-off button 12 is perpendicular to the operating surface 11 of the cut-off valve body 1; and the cut-off valve body 1 has a first end face 13 at any end of its operating surface 11, and the first end face 13 is perpendicular to the operating surface 11 of the cut-off valve body 1.

[0057] To enable the detachable installation of the motor drive module 21, refer to Figure 1 and Figure 3 A support plate 3 is provided on the shut-off valve body 1; the support plate 3 is fixedly attached to the first end face 13, and one end of it extends to the operating surface 11 side of the shut-off valve body 1 to install the motor drive module 21.

[0058] Reference Figures 1 to 5 To install the support plate 3, in this embodiment, an ear seat 14 is formed on the operating surface 11 of the shut-off valve body 1. The ear seat 14 is located on the operating surface 11 of the shut-off valve body 1 away from the first end face 13, and its installation direction is perpendicular to the first end face 13; see reference. Figure 4 The operating surface 11 of the shut-off valve body 1 is also provided with a support 4. There are multiple supports 4, and each one corresponds to a lug 14. Specifically, each support 4 includes a first column 41 and a second column 42 arranged coaxially. The radial dimension of the first column 41 is larger than that of the second column 42, and a locking bolt 421 is threaded on the second column 42.

[0059] During assembly, the end of the second column 42 facing away from the first column 41 passes through the corresponding lug 14 along the thickness direction of the support plate 3 until the end of the first column 41 facing away from the support plate 3 abuts against the corresponding end face of the corresponding lug 14; tighten the locking bolt 421 until the end near the lug 14 abuts against the end face of the corresponding lug 14 facing away from the support plate 3, so as to fix the second column 42 and the corresponding lug 14 together; then the support plate 3 is placed against the first end face 13. After the end of the first column 41 facing away from the second column 42 abuts against the support plate 3, a flat-head bolt 411 is used to fix the support plate 3 and the first column 41 together. The threaded end of the flat-head bolt 411 passes through the support plate 3 along the thickness direction of the lug 14 and is screwed into the end of the first column 41 facing away from the second column 42 until its threaded end abuts against the corresponding end face of the support plate 3. In this way, the support plate 3 can be detachably installed on the first end face 13 of the shut-off valve body 1.

[0060] Reference Figure 1 , Figure 3 and Figure 4In this embodiment, the motor drive module 21 includes an angular stroke electric actuator with an output shaft that rotates about its own axis. During assembly, the housing of the angular stroke electric actuator is detachably mounted on the support plate 3 away from the cut-off button 12 via fasteners 5. Its output shaft passes through the support plate 3 along the thickness direction and extends to the side of the shut-off valve body 1 where the cut-off button 12 is mounted, such that the output shaft of the angular stroke electric actuator is perpendicular to the axial direction of the cut-off button 12 and is located to the side of the cut-off button 12. In the embodiments of this application, the fastener 5 can be configured as a fastening bolt or other connection structure, and the specific configuration of the fastener 5 should not be regarded as a specific limitation on the scope of protection of this application.

[0061] Reference Figure 1 and Figure 5 In this embodiment, in order to facilitate the stable installation of the angular stroke electric actuator, a groove 31 is provided on the side of the support plate 3 away from the support column 4. The nut end of the flat head bolt 411 is embedded in the groove 31, and its end face is not higher than the opening end face of the groove 31.

[0062] The pressing element 22 is preferably located at the end of the output shaft of the angular stroke electric actuator and is provided corresponding to the cut-off button 12.

[0063] Reference Figure 3 and Figure 4 In this embodiment, the pressing member 22 is generally rectangular in shape, and its extension direction is perpendicular to the axis of the output shaft of the angular stroke electric actuator. To facilitate the connection between the pressing member 22 and the output shaft of the angular stroke electric actuator, a sleeve 221 is formed at one end of the length direction of the pressing member 22, and the axial direction of the sleeve 221 is perpendicular to the extension direction of the pressing member 22. During assembly, the sleeve 221 is sleeved on the shaft end of the output shaft of the angular stroke electric actuator along its own axial direction, and is fixed to the output shaft of the angular stroke electric actuator by a locking member, so that its free end rotates synchronously with the output shaft when the output shaft of the angular stroke electric actuator rotates, and presses the cut-off button 12 after rotating to the position. That is, in this embodiment, the free end of the pressing member 22 in the length direction is set as the pressing end.

[0064] Furthermore, refer to Figures 1 to 6 To improve the stability of the angular stroke electric actuator mounted on the shut-off valve body 1, this embodiment also includes an L-shaped bracket 6. Specifically, refer to... Figure 6The bracket 6 includes a first upright plate 61 and a second upright plate 62, which are perpendicular to each other, with the first upright plate 61 located at one end of the second upright plate 62. During assembly, the bracket 6 is adapted to the angle between the support plate 3 and the operating surface 11 of the shut-off valve body 1, that is, the first upright plate 61 and the second upright plate 62 are respectively attached to the corresponding support plate 3 and the operating surface 11 of the shut-off valve body 1, and then the first upright plate 61 and the support plate 3 are connected by a connector 7. In this embodiment, the connector 7 is preferably a connecting bolt and a connecting nut. The threaded end of the connecting bolt passes through the first upright plate 61 and the support plate 3 in sequence, and the first upright plate 61 and the support plate 3 are fixedly connected by the connecting nut. Similarly, the second upright plate 62 is also fixedly connected to the operating surface 11 of the shut-off valve body 1 by the connector 7. The L-shaped bracket 6 supports the support plate 3, which effectively ensures its reliable installation on the shut-off valve body 1.

[0065] Preferably, the gas safety shut-off device also includes a protective cover 8, which is hinged to the operating surface 11 of the shut-off valve body 1 to facilitate opening and closing, thereby improving the convenience of manually pressing the shut-off button 12 and corresponding maintenance operations.

[0066] Reference Figure 1 , Figure 3 and Figure 4 In this embodiment, the protective cover 8 is rotatably mounted on the shut-off valve body 1 via a hinge 9. Specifically, the first leaf of the hinge 9 is fixedly connected to the protective cover 8 via a connector 7; that is, the threaded end of the connecting bolt passes through the corresponding end faces of the first leaf of the hinge 9 and the protective cover 8 in sequence, and is fixedly connected to the protective cover 8 via a connecting nut. The second leaf of the connecting bolt is fixed to the surface of the second vertical plate 62 via the connecting bolt when the support plate 3 is installed.

[0067] Of course, the gas safety shut-off device described in this application can also be applied to pipelines for other gas media. This embodiment is only used as an example for gas pipelines.

[0068] The implementation principle of this embodiment is as follows: In actual application, the user flips the protective cover 8 and manually presses the cut-off button 12 according to actual needs to realize the cut-off operation of the corresponding gas transmission and distribution pipeline; or, the main controller remotely controls the start of the angular stroke electric actuator, the output shaft of the angular stroke electric actuator rotates, driving the pressing part 22 to rotate synchronously, so that its pressing end rotates from the side of the cut-off button 12 to the top of the cut-off button 12, and continues to rotate to press the cut-off button 12 until the corresponding gas transmission and distribution pipeline is cut off.

[0069] In this method, since the pressing actuator 2 is independently set relative to the gas transmission and distribution pipeline, the gas transmission and distribution pipeline shut-off process does not rely on the gas medium pressure, nor does it require the external discharge of gas. It also simultaneously possesses remote control shut-off and manual pressing shut-off functions, effectively improving the safety and reliability of the gas transmission and distribution pipeline shut-off process. Furthermore, by simply optimizing the original manually press-controlled gas shut-off valve, remote shut-off of the gas transmission and distribution pipeline can be achieved without significant modifications to the original gas shut-off valve, effectively reducing the company's cost investment in remote shut-off of gas transmission and distribution pipelines, thus promoting cost reduction and efficiency improvement. Moreover, it can be widely applied to gas transmission and distribution systems of different specifications, has a wide range of applications, strong practicality, simple structure, convenient installation, and good overall performance.

[0070] It should be noted that the above embodiments can be freely combined as needed. The above description is only a preferred embodiment of this application. It should be pointed out that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the protection scope of this application.

Claims

1. A gas safety shut-off device, characterized in that, include: The shut-off valve body is connected to the gas transmission and distribution pipeline, and its operating surface is equipped with a shut-off button; The pressing actuator is detachably mounted on the operating surface of the shut-off valve body, and includes a motor drive module and a pressing component; the pressing component is fixedly connected to the output shaft of the motor drive module and is used to move with the output shaft after the motor drive module is started to automatically press the shut-off button. The main controller is connected to the controller of the motor drive module by signal or electrical connection, and is used to control the motor drive module to drive the pressing element to move, thereby realizing the remote cut-off action of the gas transmission and distribution pipeline.

2. The gas safety shut-off device according to claim 1, characterized in that, A support plate, detachably mounted on the shut-off valve body, is used to mount the motor drive module; The motor drive module includes a rotary electric actuator; The housing of the angular stroke electric actuator is fixed to the support plate, and its output shaft extends to the side of the cut-off button in a direction perpendicular to the axis of the cut-off button; The pressing element has a long, flat structure, extending perpendicularly to the output shaft of the angular stroke electric actuator. One end of the pressing element is detachably fixed to the output shaft of the angular stroke electric actuator so that it rotates synchronously when the output shaft rotates, and presses the cut-off button after its free end has rotated into position.

3. A gas safety shut-off device according to claim 2, characterized in that, Ear seats are formed on the operating surface of the shut-off valve body and include multiple ear seats; The support plate is fixedly attached to the first end face of the shut-off valve body, with one end extending to the operating surface side of the shut-off valve body to install the motor drive module. The plurality of ear seats are located on the operating surface of the shut-off valve body away from the first end face, and their installation direction is perpendicular to the first end face; The support column includes multiple columns, each corresponding to one of the lugs; the two ends of the support column in the axial direction are respectively connected to the support plate and the corresponding lug, so that the support plate is fixedly pressed against the first end face; The first end face is any end face of the operating surface of the shut-off valve body.

4. A gas safety shut-off device according to claim 3, characterized in that, The support column includes a first column and a second column, which are coaxially arranged, and the radial dimension of the second column is smaller than that of the first column; The end of the first column facing away from the second column abuts against the support plate and is fixedly connected to the support plate by a flat-head bolt; The end of the second column opposite to the first column passes through the corresponding ear seat until the end of the first column opposite to the support plate abuts against the corresponding end face of the ear seat; A locking bolt is provided at the end of the second column located away from the support plate of the ear seat, and abuts against the corresponding end face of the ear seat.

5. A gas safety shut-off device according to claim 4, characterized in that, The support plate has a groove on the side away from the support column, and the nut end of the flat-head bolt is embedded in the groove, with its end face not higher than the opening end face of the groove.

6. A gas safety shut-off device according to any one of claims 2-5, characterized in that, One end of the pressing member is formed with a sleeve, and the axial direction of the sleeve is perpendicular to the extension direction of the pressing member; The sleeve is fitted axially onto the output shaft end of the angular stroke electric actuator and is fixedly connected to the output shaft of the angular stroke electric actuator by a locking member.

7. A gas safety shut-off device according to claim 6, characterized in that, It also includes a protective cover, which is detachably mounted on the operating surface of the shut-off valve body to cover the pressing element and the shut-off button.

8. A gas safety shut-off device according to claim 7, characterized in that, It also includes a bracket, which is disposed between the support plate and the operating surface of the shut-off valve body to stably connect the support plate and the shut-off valve body.

9. A gas safety shut-off device according to claim 8, characterized in that, The support includes a first vertical plate and a second vertical plate, which are perpendicular to each other and make the support have an L-shaped structure. During assembly, the first upright plate and the second upright plate are respectively attached to the operating surfaces of the corresponding support plate and the shut-off valve body, and are respectively fixedly connected to the corresponding support plate and the shut-off valve body through connectors.

10. A gas safety shut-off device according to claim 9, characterized in that, A flip hinge is located between the protective cover and the shut-off valve body. Its first leaf is fixedly connected to the protective cover by a connector, and its second leaf is fixedly connected to the second upright plate by a connector.

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