Gas safety shut-off valve

Abstract

The utility model discloses a gas safety shut-off valve which comprises a valve body and a sealing membrane installed in the middle of the valve body, a pressing plate for pressing the sealing membrane is further arranged on the valve body, the interior of the valve body is divided into a gas flowing cavity and a timing cavity through the sealing membrane, a rotating cover covering the timing cavity is installed on the top of the valve body, and a sealing plate is installed at the bottom of the valve body. A timer is installed in the timing cavity, a pressing block is rotationally installed on the pressing plate, and the timer is used for pushing the pressing block to rotate. The gas flowing cavity comprises a gas inlet channel and a gas outlet channel, a sealing mechanism is arranged between the gas inlet channel and the gas outlet channel, and the pressing block is used for adjusting the opening and closing state of the sealing mechanism; the valve body is provided with an air inlet communicated with the air outlet flow channel, and a first pipe joint is inserted into the air inlet; an air outlet is formed in the valve body, and a second pipe joint is inserted into the air outlet; the gas timing valve solves the problems that an existing gas timing valve is only suitable for a linear arrangement pipeline form, and pipe thread connection adopted by the gas timing valve is complex.

Description

Technical Field

[0001] The utility model relates to the technical field of gas valves, in particular to a gas safety cut-off valve. Background Art

[0002] With the development of urban natural gas, the number of pipeline gas users has increased rapidly, and the operation time of indoor gas facilities has increased. Since the existing household pipeline gas terminal use system is not perfect enough, there are serious safety hazards, and the gas safety problem has become increasingly prominent. People's demand for gas safety products is becoming more and more extensive, especially the demand for pipeline gas timing valve products is growing, because pipeline gas timing valves can solve the two major household gas safety hazards of gas leakage and forgetting to turn off the gas at the same time.

[0003] The gas timing valve is a pipeline gas safety valve with novel structure, superior performance, safety and reliability. It is mainly used in the bathroom and kitchen gas pipeline terminals of households and public places. It can completely solve the problems of various gas leakage accidents caused by structural defects of old valves.

[0004] On the one hand, the existing gas timing valve can only adapt to the pipeline layout in which the gas outlet and the gas inlet are on the same axis. On the other hand, most connections are made using pipe threads, which makes it inflexible when encountering changes in the gas pipeline layout. At the same time, the connection and installation operations are relatively cumbersome. Utility Model Content

[0005] 1. Technical issues

[0006] The utility model aims to provide a gas safety cut-off valve to solve the problem that the existing gas timing valve is only suitable for a straight-line pipeline and the pipe thread connection of the gas timing valve is relatively complicated.

[0007] (II) Technical solution

[0008] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0009] A gas safety shut-off valve comprises a valve body and a sealing diaphragm installed in the middle of the valve body, the valve body is also provided with a pressure plate for pressing the sealing diaphragm, the sealing diaphragm separates the interior of the valve body into a gas flow chamber and a timing chamber, a rotating cover covering the timing chamber is installed on the top of the valve body, and a sealing plate for sealing the gas flow chamber is installed on the bottom of the valve body; a timer is installed in the timing chamber, a pressure block is rotatably installed on the pressure plate, and the timer is used to push the pressure block to rotate; the gas flow chamber comprises an inlet flow channel and an outlet flow channel, a sealing mechanism is provided between the inlet flow channel and the outlet flow channel, and the pressure block is used to Adjust the opening and closing state of the sealing mechanism; the valve body is provided with an air inlet connected to the outlet flow channel, the air inlet is plugged with a first pipe joint, and the bottom of the valve body is provided with a first anti-slip member that extends into the air inlet and limits the first pipe joint; the valve body is provided with a first boss opposite to the air inlet, the valve body is provided with a second boss and a third boss that are perpendicular and symmetrically arranged relative to the axis of the first boss, the first boss or the second boss or the third boss is provided with an air outlet, the air outlet is plugged with a second pipe joint, and the bottom of the valve body is provided with a second anti-slip member that extends into the air outlet and limits the second pipe joint.

[0010] Preferably, the sealing mechanism includes a sealing seat arranged in the gas flow chamber and a flow port opened on the sealing seat, a base and a sliding shaft slidably arranged on the base are installed in the sealing seat, a sealing gasket that seals with the flow port is provided on the sliding shaft, and the upper end of the sliding shaft passes through the flow port and abuts against the sealing gasket; a buffer spring is sleeved on the base, and the buffer spring abuts against the sealing gasket.

[0011] Preferably, a first sealing ring is provided at the bottom of the sealing seat, a second sealing ring is provided at the bottom of the valve body, and the sealing plate presses the first sealing ring and the second sealing ring.

[0012] Preferably, a mounting plate located in the timing cavity is mounted on the valve body, the timer is mounted on the mounting plate, a display panel located on the timer is mounted on the valve body, the rotating cover is mounted on the rotating shaft of the timer, and a pointer is provided on the rotating shaft of the timer.

[0013] Preferably, a rotation-stopping plane is provided on the rotating shaft of the timer, and the pointer rotates synchronously with the rotating shaft of the timer.

[0014] Preferably, the rotating cover comprises a cover body and a mounting portion disposed on the cover body, the mounting portion is fixed on the rotating shaft of the timer, and the cover body is disposed on the valve body.

[0015] Preferably, a plurality of protrusions are evenly distributed on the circumference of the cover body.

[0016] Preferably, it further comprises a torsion spring, wherein the torsion spring is installed in the timer, and the elastic arm of the torsion spring pushes the timing card plate of the timer to engage with the timing disk of the timer.

[0017] Preferably, the first anti-slip member and the second anti-slip member are screws.

[0018] Preferably, it comprises a self-closing valve, a connector of the self-closing valve is inserted into the air inlet, and the first anti-slip member extends into the air inlet to limit the connector of the self-closing valve.

[0019] (III) Beneficial effects

[0020] By arranging the air inlet and the air outlet on the same axis or arranged perpendicularly to each other on the valve body, when they are on the same axis, they can be adapted to conventional straight pipelines, and when they are perpendicular, they can be adapted according to the pipeline layout. By arranging the first boss, the second boss and the third boss on the valve body, the position of the air outlet can be processed according to the actual situation, thereby improving the applicability of the entire valve and adapting to the piping requirements in various directions in various environments.

[0021] At the same time, by inserting the first pipe joint and the second pipe joint into the valve body, and limiting the first pipe joint by the first stopper, and limiting the second pipe joint by the second stopper, the first pipe joint and the second pipe joint can be locked from the inside. During the specific installation, only the first pipe joint and the second pipe joint need to be connected to the gas pipeline. Compared with the threaded connection, the plug-in connection method is more convenient for adjusting the position of the valve body after installation, and the installation operation is simple.

[0022] After installation, the timer is adjusted to push the pressing block to rotate and drive the sealing mechanism to the open state, so that the gas can flow from the inlet flow channel to the outlet flow channel. After the timer is up, the pressing block is no longer subject to the force applied by the timer, and the sealing mechanism is reset to close the connectivity between the inlet flow channel and the outlet flow channel. Even if the user forgets to close the gas, the sealing mechanism can be automatically closed in time, thus ensuring the safety of the user in using the gas.

[0023] During use, the functions of gas over-pressure shutdown, low-pressure valve closing, over-current valve closing, leakage valve closing and timed valve closing can be realized. Each valve closing action can operate independently without interfering with each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0025] Figure 2 It is a cross-sectional structural schematic diagram of an embodiment of the utility model;

[0026] Figure 3A schematic diagram of a three-dimensional explosion structure from a first perspective of an embodiment of the utility model;

[0027] Figure 4 A schematic diagram of a three-dimensional explosion structure from a second viewing angle of an embodiment of the utility model;

[0028] Figure 5 This is a schematic diagram of the three-dimensional structure of the valve body in the embodiment of the utility model from a first perspective;

[0029] Figure 6 It is a schematic diagram of the three-dimensional structure of the valve body in the embodiment of the utility model from a second viewing angle;

[0030] Figure 7 This is a schematic diagram of the structure of the timer in the embodiment of the utility model;

[0031] Figure 8 This is a schematic diagram of the structure of the self-closing valve assembled in the embodiment of the utility model;

[0032] exist Figures 1 to 8 In the figure, the corresponding relationship between the component names or lines and the figure numbers is as follows:

[0033] Valve body 1, gas flow chamber 101, timing chamber 102, air inlet 103, air outlet 104, first boss 105, second boss 106, third boss 107, sealing diaphragm 2, pressure plate 3, rotating cover 4, cover body 41, mounting portion 42, raised portion 43, sealing plate 5, timer 6, pressure block 7, sealing mechanism 8, sealing seat 81, flow port 82, base 83, sliding shaft 84, sealing gasket 85, buffer spring 86, first pipe joint 9, first anti-slip member 10, second pipe joint 11, second anti-slip member 12, first sealing ring 13, second sealing ring 14, mounting plate 15, display panel 16, pointer 17, anti-rotation plane 18, torsion spring 19, self-closing valve 20. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0035] See also Figure 1-Figure 8 As shown, a gas safety shut-off valve is proposed in the embodiment of the utility model. The gas timing valve is installed in the gas pipeline and is generally used after entering the house. By presetting the gas usage time, the gas is automatically shut off after the time is up. This can avoid the situation where it is easy to forget to turn off the gas, and can automatically shut off the gas in time to avoid the danger of large-scale gas leakage, thereby improving the safety of users using gas.

[0036] Specifically, the gas timing valve includes a valve body 1 and a sealing diaphragm 2 installed in the middle of the valve body 1. The valve body 1 is also provided with a pressure plate 3 for pressing the sealing diaphragm 2. The sealing diaphragm 2 separates the interior of the valve body 1 into a gas flow chamber 101 and a timing chamber 102. A rotating cover 4 covering the timing chamber 102 is installed on the top of the valve body 1. A sealing plate 5 for sealing the gas flow chamber 101 is installed at the bottom of the valve body 1. After the sealing diaphragm 2 is pressed against the middle of the valve body 1 by the pressure plate 3, the gas flow chamber 101 and the timing chamber 102 can be independently sealed, and the gas will not leak from the timing chamber 102. At the same time, the gas flow chamber 101 is sealed by the sealing plate 5, and it is convenient to open the sealing plate 5 to assemble or maintain the internal components.

[0037] A timer 6 is installed in the timing chamber 102, and a pressure block 7 is rotatably installed on the pressure plate 3. The timer 6 is used to push the pressure block 7 to rotate. The gas flow chamber 101 includes an inlet flow channel and an outlet flow channel. A sealing mechanism 8 is provided between the inlet flow channel and the outlet flow channel, and the pressure block 7 is used to adjust the opening and closing state of the sealing mechanism 8. The timer 6 can be a mature product commonly used in gas timing valves. After adjusting the time, the timer 6 will generate a driving force to make the pressure block 7 rotate and form a downward pressure on the sealing mechanism 8, so that the sealing mechanism 8 opens the inlet flow channel and the outlet flow channel to realize gas circulation. After the time of the timer 6 is up, no force is applied to the pressure block 7. At this time, the reset seal is realized under the reset action of the sealing mechanism 8 to cut off the gas circulation, thereby making up for the leakage or forgetfulness in the process of gas use, thereby improving the safety of gas use.

[0038] The above structure constitutes the basic structure of the gas timing valve, and part of the structure can directly adopt the mature technology in the existing gas timing valve.

[0039] The existing gas timing valve is generally only applicable to straight pipeline scenarios during installation, and is relatively cumbersome to install. In view of the current defects, the installation part is optimized and improved to improve the convenience of installation and be more adaptable to changes in on-site pipelines.

[0040] Specifically, the valve body 1 is provided with an air inlet 103 connected to the outlet flow channel, and the air inlet 103 is plugged with a first pipe joint 9. The bottom of the valve body 1 is provided with a first anti-slip component 10 which extends into the air inlet 103 and limits the first pipe joint 9. The first pipe joint 9 is plugged through the air inlet 103, and an O-ring is sleeved on the first pipe joint 9 for sealing. After being plugged into place, the first anti-slip component 10 extends into the air inlet 103 to limit the first pipe joint 9, thereby preventing the first pipe joint 9 from slipping out.

[0041] The first anti-slip member 10 is arranged at the bottom of the valve body 1 and located outside the sealing plate 5, so as to facilitate adjustment of the first anti-slip member 10 during installation. Specifically, the first anti-slip member 10 can be a screw, a pin, etc.

[0042] At the same time, the valve body 1 is provided with a first boss 105 opposite to the air inlet 103, the valve body 1 is provided with a second boss 106 and a third boss 107 which are perpendicular and symmetrically arranged relative to the axis of the first boss 105, the first boss 105 or the second boss 106 or the third boss 107 is provided with an air outlet 104, the air outlet 104 is plugged with a second pipe joint 11, the bottom of the valve body 1 is provided with a second stopper 12 which extends into the air outlet 104 and limits the second pipe joint 11, the second stopper 12 is used to limit and prevent the second pipe joint 11 from falling off, and the second stopper 12 is arranged at the bottom of the valve body 1 and covered by the sealing plate 5, so that the second pipe joint 11 is not replaced under normal circumstances. Specifically, the first stopper 10 and the second stopper 12 can be screws or pins, wherein the first stopper 10 can be adjusted externally to replace or disassemble the first pipe joint 9, while the second pipe joint 11 is generally not replaced.

[0043] After the valve body 1 is processed, there is only one gas outlet 104. According to the gas pipeline layout at the gas timing valve installation site, it may be a straight pipe or a cross pipeline. Therefore, the processing position of the gas outlet 104 can be adjusted based on the on-site installation direction requirements. By pre-arranging the first boss 105, the second boss 106 and the third boss 107 on the valve body 1, a processing foundation is reserved for the subsequent processing of the gas outlet 104, especially that the gas outlet 104 is connected to the gas flow cavity 101 after processing, and the structural strength of the valve body 1 is not affected.

[0044] The sealing mechanism 8 is used to control the opening and closing of the inlet and outlet flow channels. The existing structure can be adopted, or the following scheme can be adopted. Specifically, the sealing mechanism 8 includes a sealing seat 81 arranged in the gas flow chamber 101 and a flow port 82 opened on the sealing seat 81, wherein the sealing seat 81 is a part of the valve body 1 and can be integrally formed with the valve body 1, and the flow port 82 is arranged on the sealing seat 81 and can be arranged at intervals, and a support position is reserved in the middle of the flow port 82. A base 83 and a sliding shaft 84 slidably arranged on the base 83 are installed in the sealing seat 81, and a sealing gasket 85 is provided on the sliding shaft 84 for sealingly cooperating with the flow port 82. The upper end of the sliding shaft 84 passes through the flow port 82 and abuts against the sealing gasket 85. The sliding shaft 84 forms a stable sliding on the base 83 and the supporting part, and the sealing gasket 85 can press the flow port 82 to achieve sealing when it moves upward. Specifically, a buffer spring 86 is sleeved on the base 83, and the buffer spring 86 abuts against the sealing gasket 85. In the normally closed state, the buffer spring 86 is used to push the sealing gasket 85 to compress and seal the flow port 82.

[0045] When it is necessary to open the sealing mechanism 8, a force is applied to the pressure block 7 through the timer 6, and the pressure block 7 applies a force to the sliding shaft 84 through the sealing diaphragm 2, so that the sliding shaft 84 moves downward with the sealing gasket 85, thereby opening the flow port 82. At this time, the buffer spring 86 is in a compressed state. After the force applied by the pressure block 7 disappears, the buffer spring 86 resets to press the sealing gasket 85 again to cut off the gas.

[0046] The sealing of the sealing seat 81 and the bottom of the valve body 1 are both achieved through the sealing plate 5. In order to improve the sealing performance, a first sealing ring 13 is provided at the bottom of the sealing seat 81, and a second sealing ring 14 is provided at the bottom of the valve body 1. The sealing plate 5 presses the first sealing ring 13 and the second sealing ring 14. The independently arranged first sealing ring 13 can prevent the gas in the gas flow cavity 101 from bypassing the sealing gasket 85 to flow, while the second sealing ring 14 ensures that the gas in the gas flow cavity 101 is sealed, thereby improving the sealing performance and effectively avoiding the risk of failure of the sealing gasket 85 to cut off the gas.

[0047] Specifically, a mounting plate 15 located in the timing cavity 102 is installed on the valve body 1, the timer 6 is installed on the mounting plate 15, a display panel 16 located on the timer 6 is installed on the valve body 1, the rotating shaft of the timer 6 is installed with the rotating cover 4, and a pointer 17 is provided on the rotating shaft of the timer 6; the timer 6 is fixedly installed by the mounting plate 15, and a scale mark is provided on the display panel 16, and when the rotating shaft of the timer 6 is rotated by the rotating cover 4, the pointer 17 rotates synchronously.

[0048] Specifically, a stop plane 18 is provided on the rotating shaft of the timer 6, and the support can rotate synchronously with the rotating shaft of the timer 6, so that the rotation of the pointer 17 can be more accurate. At the same time, the rotating cover 4 and the stop plane 18 also cooperate, and the rotating shaft of the timer 6 and the pointer 17 rotate synchronously after the rotating cover 4 rotates, forming a unified rotation, that is, the error between the rotation angle and the indication of the pointer 17 is extremely small.

[0049] The rotating cover 4 includes a cover body 41 and a mounting portion 42 disposed on the cover body 41, wherein the mounting portion 42 is fixed on the rotating shaft of the timer 6, and the cover body 41 is covered on the valve body 1, and the mounting portion 42 is matched with the rotating shaft of the timer 6 to achieve installation, and the cover body 41 is used to expose the internal display panel 16, so that the entire rotating cover 4 can be made of transparent material, or a transparent window can be reserved in the scale reading area. The entire rotating cover 4 is an integrated structure, and can also provide a protective cover for the interior.

[0050] In order to facilitate holding the rotating cover 4 for rotation and increase friction, a plurality of protrusions 43 are evenly distributed on the circumference of the cover body 41 .

[0051] Therefore, when adjusting the timer 6, it is only necessary to rotate the rotating cover 4, and the synchronous pointer 17 indicates the countdown time, and the pointer 17 rotates synchronously with the reset of the timer 6.

[0052] At the same time, in order to ensure stable engagement of the timing card plate and the timing disk in the timer 6, a torsion spring 19 is also included. The torsion spring 19 is installed in the timer 6. The elastic arm of the torsion spring 19 pushes the timing card plate of the timer 6 to engage with the timing disk of the timer 6. The timing card plate is pressed by the torque generated by the torsion spring 19 to ensure that the engagement between the timing card plate and the timing disk is in a stable state, especially after an outward force is applied, a stable engagement state can be maintained under a reverse force. The other components of the timer 6 can adopt a mature structure, and this time the main focus is on adding the torsion spring 19.

[0053] In order to further supplement the shut-off action and ensure the sealing effect, a self-closing valve 20 is also included. The self-closing valve 20 can adopt a structure integrated into the interior of the overall valve, or an overall self-closing valve structure can be set externally. The connector of the self-closing valve 20 is inserted into the air inlet 103, and the first stop member 10 extends into the air inlet 103 to limit the connector of the self-closing valve 20. Since the self-closing valve 20 is an existing mature product, it can be directly used. After disassembling the first pipe joint 9, the connector of the self-closing valve 20 is inserted into the air inlet 103, and the connector of the self-closing valve 20 is limited by the first stop member 10; the self-closing valve 20 is set at one end of the air inlet 103 of the entire timing valve. The self-closing valve 20 generally needs to be automatically closed when a high pressure is formed at the rear end. Therefore, the self-closing valve 20 is automatically closed only after the rear end timing valve is closed, thereby improving safety. At the same time, after the self-closing valve 20 is set at one end of the air inlet 103 of the timing valve, when the timing valve is opened in time when the gas is used, the self-closing valve 20 needs to be actively opened to realize the flow of gas, which can also ensure the safety during use. In summary, the self-closing valve 20 is set at one end of the air inlet 103 of the timing valve to meet the requirements of stable and safe use.

[0054] Specifically, the self-closing valve 20 may be an integrated part integrated into the valve body, or a part that cannot be removed from the valve body and is arranged outside the valve body as a non-detachable structure, or other valve structures that can achieve the self-closing function may be adopted.

[0055] Therefore, the first anti-slip member 10 can be adjusted to facilitate switching between the first pipe joint 9 and the self-closing valve 20. The first pipe joint 9 or the self-closing valve 20 can be installed at the air inlet 103 according to actual use requirements.

[0056] In addition, it should be noted that fuel gas is a hazardous gas, and therefore all parts that are not described in this embodiment but need to be sealed need to be sealed. Currently known mature sealing technology can be used, and will not be repeated in this embodiment.

[0057] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "inner", "outer", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0059] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A gas safety shut-off valve, comprising a valve body and a sealing diaphragm installed in the middle of the valve body, the valve body is also provided with a pressure plate for pressing the sealing diaphragm, the sealing diaphragm separates the interior of the valve body into a gas flow chamber and a timing chamber, the top of the valve body is provided with a rotating cover covering the timing chamber, and the bottom of the valve body is provided with a sealing plate for sealing the gas flow chamber; A timer is installed in the timing cavity, a pressing block is rotatably installed on the pressing plate, and the timer is used to drive the pressing block to rotate; The gas flow chamber comprises an inlet flow channel and an outlet flow channel, a sealing mechanism is provided between the inlet flow channel and the outlet flow channel, and the pressing block is used to adjust the opening and closing state of the sealing mechanism; Features: The valve body is provided with an air inlet connected to the outlet flow channel, the air inlet is plugged with a first pipe joint, and the bottom of the valve body is provided with a first stopper extending into the air inlet and limiting the first pipe joint; The valve body is provided with a first boss opposite to the air inlet, and the valve body is provided with a second boss and a third boss which are perpendicular and symmetrically arranged with respect to the axis of the first boss. The first boss or the second boss or the third boss is provided with an air outlet, and a second pipe joint is plugged into the air outlet. A second anti-slip member is provided at the bottom of the valve body which extends into the air outlet and limits the second pipe joint.

2. A gas safety shut-off valve according to claim 1, characterized in that: The sealing mechanism comprises a sealing seat arranged in the gas flow cavity and a flow port opened on the sealing seat, a base and a sliding shaft slidably arranged on the base are installed in the sealing seat, a sealing gasket which is sealed with the flow port is arranged on the sliding shaft, and the upper end of the sliding shaft passes through the flow port and abuts against the sealing gasket; A buffer spring is sleeved on the base, and the buffer spring abuts against the sealing pad.

3. A gas safety shut-off valve according to claim 2, characterized in that: A first sealing ring is provided at the bottom of the sealing seat, a second sealing ring is provided at the bottom of the valve body, and the sealing plate presses the first sealing ring and the second sealing ring.

4. A gas safety shut-off valve according to any one of claims 1 to 3, characterized in that: The valve body is provided with a mounting plate located in the timing cavity, the timer is mounted on the mounting plate, the valve body is provided with a display panel located on the timer, the rotating shaft of the timer is provided with the rotating cover, and a pointer is provided on the rotating shaft of the timer.

5. A gas safety shut-off valve according to claim 4, characterized in that: A rotation-stopping plane is arranged on the rotating shaft of the timer, and the pointer rotates synchronously with the rotating shaft of the timer.

6. A gas safety shut-off valve according to claim 5, characterized in that: The rotating cover comprises a cover body and a mounting portion arranged on the cover body, the mounting portion is fixed on the rotating shaft of the timer, and the cover body is covered on the valve body.

7. A gas safety shut-off valve according to claim 6, characterized in that: A plurality of protrusions are evenly distributed on the circumference of the cover body.

8. A gas safety shut-off valve according to claim 4, characterized in that: It also includes a torsion spring, which is installed in the timer. The elastic arm of the torsion spring pushes the timing card plate of the timer to be clamped on the timing disk of the timer.

9. A gas safety shut-off valve according to any one of claims 1 to 3, characterized in that: The first locking member and the second locking member are screws.

10. A gas safety shut-off valve according to any one of claims 1 to 3, characterized in that: It comprises a self-closing valve, a connector of the self-closing valve is inserted into the air inlet, and the first anti-slip component extends into the air inlet to limit the connector of the self-closing valve.

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