Adjustable chuck for gas valve key

Abstract

The present invention discloses an adjustable chuck for a gas valve key, comprising: a chuck mechanism for clamping a gas valve stem, the chuck mechanism including a plurality of jaws; an angle adjustment assembly for driving the jaws to move and adjust the distribution positions of the plurality of jaws; and a lifting assembly for adjusting the dynamic opening and closing range of the jaws. The present invention provides a chuck mechanism for clamping the gas valve stem, and provides an angle adjustment assembly and a lifting assembly. This allows the chuck mechanism to quickly change the distribution positions of the jaws within the chuck mechanism and the dynamic opening and closing range of the jaws according to the corresponding valve stem when facing different models of gas valve stems, thereby being able to adapt to as many different models of gas valve stems as possible. Furthermore, by providing a universal connection assembly to connect the chuck mechanism and the gas valve key handle, it is ensured that the gas valve key handle can stably drive the chuck mechanism to rotate even in complex operating environments, further increasing the scope of application.

Description

Technical Field

[0001] The present invention relates to the technical field of gas equipment, and in particular to an adjustable chuck of a gas valve key. Background Art

[0002] The statements herein merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] Buried valves are safety devices for gas pipeline projects. They are used to cut off, connect, and regulate gas in the pipeline. They have good control characteristics and closing and sealing performance. When a gas hazard occurs, the buried valve can be urgently closed through the valve opening and closing key to reduce leakage.

[0004] Since the shapes and opening methods of various valve models are different, and valves of the same size are manufactured by many manufacturers with size differences, operators need to carry a large number of valve opening keys for the corresponding valve models, which takes up a large volume and is inconvenient to carry, and cannot meet the requirements of fast and flexible operation. Summary of the Invention

[0005] The purpose of the present invention is to address the above-mentioned shortcomings and provide an adjustable chuck for a gas valve key, which is compatible with multiple types of valves and is easy to carry.

[0006] To solve the above technical problems, the present invention adopts the following technical solution: an adjustable chuck for a gas valve key, comprising:

[0007] A chuck mechanism, used for clamping a gas valve stem, the chuck mechanism comprising a plurality of clamping jaws;

[0008] Angle adjustment component, used to drive the movement of the clamping jaws and adjust the distribution positions of multiple clamping jaws;

[0009] The lifting assembly is used to adjust the dynamic opening and closing range of the gripper jaws.

[0010] Furthermore, the chuck mechanism includes a first sleeve, a first support that can move toward and away from the first sleeve and can rotate with the first sleeve is provided at the bottom of the first sleeve, a plurality of the clamping jaws are rotatably provided on the first support, a pull rope is provided on one end of the first support close to the first sleeve, a second support is provided on the first sleeve, a connecting rod rotatably connected to the clamping jaws is provided on the second support, and a first compression spring is provided between the first support and the first sleeve;

[0011] The clamping jaw is L-shaped and consists of a transverse section and a vertical section arranged at the bottom of the transverse section. The two ends of the transverse section are rotatably connected to the connecting rod and the first support respectively.

[0012] One end of the pull rope away from the first support is connected to the traction mechanism for retracting and releasing the pull rope.

[0013] Furthermore, a second compression spring is provided between the plurality of clamping jaws and the first sleeve, and the second compression spring is located between the connecting rod and the first support.

[0014] Furthermore, the number of the clamping jaws and the connecting rods is multiple and each is an integer multiple of two, two adjacent clamping jaws and the two connecting rods of the corresponding clamping jaws constitute a group of clamping assemblies, the chuck mechanism is provided with at least two groups of clamping assemblies, and the first support and the second support are both provided with multiple angle adjustment assemblies corresponding to the multiple groups of clamping assemblies;

[0015] The angle adjustment assembly includes two side plates arranged on the outer peripheral wall of the second support, and an arc track is arranged between the two side plates. One of the clamping jaws and one of the corresponding connecting rods in each group of the clamping assemblies are respectively rotatably connected to the arc track on the corresponding angle adjustment assembly, and can move back and forth along the arc track toward the other clamping jaw and the other connecting rod.

[0016] Furthermore, a first motor is provided on the connecting rod rotatably arranged on the arc track, a first gear is provided at the output end of the first motor, and an external tooth groove meshing with the first gear is provided on the arc track corresponding to the second support.

[0017] Furthermore, the second support is slidably sleeved on the first sleeve, and the lifting assembly is provided on the first sleeve for driving the second support to move up and down;

[0018] The lifting assembly includes a first screw sleeve rotatably arranged on the top of the second support. The second support moves synchronously with the up and down movement of the first screw sleeve. The first sleeve is provided with an external thread groove adapted to the first screw sleeve.

[0019] Furthermore, the lifting assembly also includes a second motor arranged in the first sleeve, and the output end of the second motor is provided with a second gear passing through the first sleeve. The first screw sleeve is vertically provided with an internal tooth groove that meshes with the second gear, and the length of the internal tooth groove is not less than the distance that the first screw sleeve can move up and down.

[0020] Furthermore, a universal connection assembly is provided between the chuck mechanism and the gas valve key handle, for maintaining torque transmission when the chuck mechanism is deflected.

[0021] The cam is secured to the bottom of the second sleeve so that the cam can be moved up and down, and the cam is secured to the bottom of the second sleeve so that the cam can be moved up and down.

[0022] One end of the L-shaped top block is tilted upward and away from the second sleeve, and the other end of the L-shaped top block is tilted downward and close to the third sleeve and abuts the third sleeve. The rotation center of the L-shaped top block is located in the middle. When the top ring moves downward, it can enter the gap between the L-shaped top block and the second sleeve and squeeze the top of the L-shaped top block, so that when one of the L-shaped top blocks is in the groove, the other L-shaped top block abuts the third sleeve and pushes the third sleeve to deflect to one side.

[0023] Furthermore, a convex block opposite to the groove is provided at the bottom end of the top ring. When the convex block moves downward, it can enter the gap between the L-shaped top block and the second sleeve and squeeze the top of the L-shaped top block.

[0024] The beneficial effects of the present invention are embodied in:

[0025] The present invention provides a chuck mechanism for clamping the gas valve stem, and provides an angle adjustment component and a lifting component. When the chuck mechanism faces different types of gas valve stems, the distribution position of the clamping jaws in the chuck mechanism and the dynamic opening and closing range of the clamping jaws can be quickly changed according to the corresponding valve stems, thereby being able to adapt to as many different types of gas valve stems as possible. Moreover, by providing a universal connection component to connect the chuck mechanism and the gas valve key handle, it can be ensured that the gas valve key handle can stably drive the chuck mechanism to rotate in the face of complex operating environments, thereby further improving the scope of application. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A three-dimensional view of the present invention;

[0027] Figure 2 A partial view of the chuck mechanism of the present invention;

[0028] Figure 3 It is a partial cross-sectional view of the chuck mechanism of the present invention;

[0029] Figure 4 A partial view of the lifting assembly of the present invention;

[0030] Figure 5 It is a three-dimensional view of the universal connection assembly of the present invention.

[0031] In the picture:

[0032] 1. Chuck mechanism; 11. First sleeve; 12. First support; 13. Clamping jaw; 14. Pull rope; 15. Second support; 16. Connecting rod; 17. First compression spring; 18. Second compression spring;

[0033] 2. Angle adjustment assembly; 21. Side panel; 22. Arc track; 23. First motor;

[0034] 3. Lifting assembly; 31. First screw sleeve; 32. Second motor;

[0035] 4. Universal joint assembly; 41. Second sleeve; 42. Third sleeve; 43. Latch; 44. L-shaped top block; 45. Second screw sleeve; 46. Top ring; 47. Protrusion. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0037] See also Figure 1-5 The present invention discloses an adjustable chuck of a gas valve key, comprising:

[0038] A clamping mechanism 1 is used to clamp the gas valve stem, and the clamping mechanism 1 includes a plurality of clamping jaws 13;

[0039] Angle adjustment component 2, used to drive the clamping jaws 13 to move and adjust the distribution positions of the multiple clamping jaws 13;

[0040] Lifting assembly 3, used to adjust the dynamic opening and closing range of the clamping jaw 13;

[0041] The universal connection assembly 4 is connected to the chuck mechanism 1 at one end and to the gas valve key handle at the other end, and is used to maintain torque transmission when the chuck mechanism 1 is deflected.

[0042] The present invention provides a chuck mechanism 1 for clamping the gas valve stem, and provides an angle adjustment component 2 and a lifting component 3, so that the chuck mechanism 1 can quickly change the distribution position of the clamping jaws 13 in the chuck mechanism 1 and the dynamic opening and closing range of the clamping jaws 13 according to the corresponding valve stem when facing different types of gas valve stems, thereby being able to adapt to as many different types of gas valve stems as possible. By providing a universal connection component 4 to connect the chuck mechanism 1 and the gas valve key handle, it can be ensured that the gas valve key handle can stably drive the chuck mechanism 1 to rotate when facing complex operating environments, thereby further improving the scope of application.

[0043] In one embodiment, the chuck mechanism 1 includes a first sleeve 11, one end of the first sleeve 11 is connected to the universal connection assembly 4, the other end of the first sleeve 11 is provided with a first support 12 that can move toward and away from the first sleeve 11 and can rotate with the first sleeve 11, multiple clamping jaws 13 are rotatably provided on the first support 12, the first support 12 is provided with a pull rope 14 at one end close to the first sleeve 11, the first sleeve 11 is sleeved with a second support 15, the second support 15 is provided with a connecting rod 16 rotatably connected to the clamping jaws 13, a first compression spring 17 is provided between the first support 12 and the first sleeve 11, and a second compression spring 18 is provided between the multiple clamping jaws 13 and the first sleeve 11;

[0044] The clamping jaw 13 is L-shaped and consists of a transverse section and a vertical section arranged at the bottom of the transverse section. The two ends of the transverse section are rotatably connected to the connecting rod 16 and the first support 12 respectively. The second compression spring 18 is located between the connecting rod 16 and the first support 12.

[0045] One end of the pull rope 14 away from the first support 12 is connected to a traction mechanism for retracting and releasing the pull rope 14 .

[0046] With this design, when the chuck mechanism 1 is put on the gas valve stem, the pull rope 14 is pulled up to make the clamping jaw 13 rotate toward the side close to the gas valve stem under the restriction of the connecting rod 16 until the gas valve stem is clamped. At the same time, the second compression spring 18 applies a thrust to the clamping jaw 13 during the clamping process of the clamping jaw 13, which can effectively prevent the clamping jaw 13 from being loose due to wear and tear over a long period of time. On the contrary, when the pull rope 14 is loosened, the first compression spring 17 pushes the first support 12 to move down and reset, driving the clamping jaw 13 to rotate in the opposite direction, loosening the gas valve stem, and then the chuck mechanism 1 can be moved up to be removed from the valve well. By controlling the stretching length of the pull rope 14, the purpose of compatibility with gas valve stems of different models and specifications is achieved, which can effectively solve the problem that the current valve opening keys have different specifications and sizes, the number of keys to be carried is large, the volume is large, and the portability is inconvenient.

[0047] It should be noted that the traction mechanism is a mature existing technology and will not be described in detail here.

[0048] In one embodiment, the number of the clamping jaws 13 and the connecting rods 16 is multiple and each is an integer multiple of two. Two adjacent clamping jaws 13 and the two connecting rods 16 corresponding to the clamping jaws 13 constitute a set of clamping assemblies. The chuck mechanism 1 is provided with at least two sets of clamping assemblies. The first support 12 and the second support 15 are both provided with multiple angle adjustment assemblies 2 corresponding to the multiple sets of clamping assemblies.

[0049] The angle adjustment assembly 2 includes two side plates 21 arranged on the outer peripheral wall of the second support 15, and an arc track 22 is arranged between the two side plates 21. One of the clamping jaws 13 of each group of clamping assemblies and one of the corresponding connecting rods 16 are respectively rotatably connected to the arc track 22 on the corresponding angle adjustment assembly 2, and can reciprocate along the arc track 22 toward the other clamping jaw 13 and the other connecting rod 16. The other clamping jaw 13 of each group of clamping assemblies and the other corresponding connecting rod 16 are respectively rotatably connected to one of the side plates 21 on the corresponding angle adjustment assembly 2. A first motor 23 is provided on the connecting rod 16 rotatably arranged on the arc track 22, and a first gear is provided at the output end of the first motor 23. An external tooth groove meshing with the first gear is provided on the arc track 22 corresponding to the second support 15.

[0050] This design can drive the first gear to move along the arc track 22 with external tooth grooves by starting the first motor 23, or manually push it, so as to drive the clamping jaws 13 and connecting rod 16 connected thereto to move along the arc track 22, thereby changing the horizontal angle between the two clamping jaws 13 in the same group, and further improving the compatibility of the chuck mechanism 1 with different gas valve stems.

[0051] In one embodiment, the second support 15 is slidably mounted on the first sleeve 11, and the lifting assembly 3 is disposed on the first sleeve 11 to drive the second support 15 to move up and down;

[0052] The lifting assembly 3 includes a first screw sleeve 31 rotatably arranged on the top of the second support 15, and the second support 15 moves synchronously with the up and down movement of the first screw sleeve 31. The first sleeve 11 is provided with an external thread groove adapted to the first screw sleeve 31. The lifting assembly 3 also includes a second motor 32 arranged in the first sleeve 11. The output end of the second motor 32 is provided with a second gear passing through the first sleeve 11. The first screw sleeve 31 is vertically provided with an internal tooth groove meshing with the second gear, and the length of the internal tooth groove is not less than the distance that the first screw sleeve 31 can move up and down.

[0053] With this design, by rotating the first screw sleeve 31 to drive the second support 15 to move up and down, the initial position of the connecting rod 16 and the initial angle of the clamping jaw 13 can be changed, which can effectively increase the clamping range of the clamping jaw 13 and further improve the compatibility of the chuck mechanism 1 with different gas valve stems. At the same time, due to the setting of the second motor 32 and the second gear, the first screw sleeve 31 can also be driven to rotate by the second motor 32 to meet different usage requirements.

[0054] In one embodiment, the universal connection assembly 4 includes a second sleeve 41 connected to the gas valve key handle, and a third sleeve 42 is provided at the bottom of the second sleeve 41, which is inserted into the second sleeve 41 and can move up and down. The bottom of the third sleeve 42 is connected to the first sleeve 11. The internal aperture of the second sleeve 41 is larger than the outer diameter of the third sleeve 42. The third sleeve 42 is provided with a pin 43 that passes through the second sleeve 41 horizontally. The second sleeve 41 is provided with a bar hole for the pin 43 to move up and down. The third sleeve 42 is rotatably provided with two pins for pushing the third sleeve 42 to rotate. The latch 43 is rotatably offset from an L-shaped top block 44. The two L-shaped top blocks 44 are mirror-symmetrical about the axis of the second sleeve 41. A second screw sleeve 45 is rotatably provided on the second sleeve 41. The second sleeve 41 is provided with an external thread groove that matches the second screw sleeve 45. A top ring 46 is rotatably provided at the bottom end of the second screw sleeve 45 and can move up and down with the second screw sleeve 45. The maximum distance between the top ends of the two L-shaped top blocks 44 is no less than the outer diameter of the top ring 46. The bottom end of the top ring 46 is provided with at least one groove for avoiding the L-shaped top block 44, and the top ring 46 is in the shape of an inverted frustum.

[0055] One end of the L-shaped top block 44 is tilted upward and away from the second sleeve 41, and the other end of the L-shaped top block 44 is tilted downward and close to the third sleeve 42 and abuts against the third sleeve 42. The rotation center of the L-shaped top block 44 is located in the middle. When the top ring 46 moves downward, it can enter the gap between the L-shaped top block 44 and the second sleeve 41 and squeeze the top of the L-shaped top block 44, so that when one of the L-shaped top blocks 44 is in the groove, the other L-shaped top block 44 abuts against the third sleeve 42 and pushes the third sleeve 42 to deflect to one side.

[0056] With this design, the groove is adjusted not to be directly above the L-shaped top block 44 by rotating the top ring 46, and then the second screw sleeve 45 is rotated to drive the top ring 46 to move down and abut against the L-shaped top block 44. The L-shaped top block 44 is pushed and rotated, limiting the rotation margin of the third sleeve 42 in the second sleeve 41, so that in this state, the gas valve key handle and the chuck mechanism 1 are in the same straight line, which can meet the normal clamping and rotation requirements; secondly, the groove is adjusted to be directly above the L-shaped top block 44 by rotating the top ring 46, and then the second screw sleeve 45 is rotated to move one of the L-shaped top blocks 44 into the groove and the other L The shaped top block 44 is pushed by the top ring 46 to squeeze the third sleeve 42, causing the third sleeve 42 to rotate to the other side. As a result, in this state, the gas valve key handle is not in the same straight line as the chuck mechanism 1, which can meet the clamping requirements of a narrow environment; secondly, by rotating the second screw sleeve 45, the second screw sleeve 45 is in the upper limit position. At this time, the chuck mechanism 1 is connected to the gas valve stem, so that when the chuck mechanism 1 and the gas valve key handle are at a deflection angle, the chuck mechanism 1 can still be driven to rotate by the rotation of the gas valve key handle under the cooperation of the third sleeve 42, the strip hole and the pin 43.

[0057] It should be noted that when the actuator is used, the positions of the top ring 46 and the second screw sleeve 45 need to be manually adjusted in advance according to the use environment.

[0058] In one embodiment, a protrusion 47 opposite to the groove is further provided at the bottom end of the top ring 46 . When the protrusion 47 moves downward, it can enter the gap between the L-shaped top block 44 and the second sleeve 41 and squeeze the top of the L-shaped top block 44 .

[0059] This design allows one of the L-shaped top blocks 44 to move into the groove, while the other L-shaped top block 44 is pushed by the protrusion 47 , which can accelerate the L-shaped top block 44 to push the third sleeve 42 to deflect, thereby reducing the height that the top ring 46 needs to move downward.

[0060] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), such directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0061] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0062] In addition, "plurality" means two or more.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An adjustable chuck for a gas valve key, characterized in that: include: A clamping mechanism (1) for clamping a gas valve stem, the clamping mechanism (1) comprising a plurality of clamping jaws (13); An angle adjustment component (2) is used to drive the clamping jaws (13) to move and adjust the distribution positions of the plurality of clamping jaws (13); A lifting assembly (3) for adjusting the dynamic opening and closing range of the clamping jaws (13); The chuck mechanism (1) includes a first sleeve (11), a first support (12) capable of moving toward and away from the first sleeve (11) and rotating along with the first sleeve (11) is provided at the bottom of the first sleeve (11), a plurality of clamping jaws (13) are rotatably provided on the first support (12), a pull rope (14) is provided at one end of the first support (12) close to the first sleeve (11), a second support (15) is provided on the first sleeve (11), a connecting rod (16) rotatably connected to the clamping jaw (13) is provided on the second support (15), and a first compression spring (17) is provided between the first support (12) and the first sleeve (11); The clamping claw (13) is L-shaped and consists of a transverse section and a vertical section arranged at the bottom of the transverse section. The two ends of the transverse section are rotatably connected to the connecting rod (16) and the first support (12) respectively. The pull rope (14) is connected to a traction mechanism at one end away from the first support (12) and is used for retracting and releasing the pull rope (14); The number of the clamping jaws (13) and the connecting rods (16) is multiple and is an integer multiple of two. Two adjacent clamping jaws (13) and the two connecting rods (16) corresponding to the clamping jaws (13) form a group of clamping components. The chuck mechanism (1) is provided with at least two groups of clamping components. The first support (12) and the second support (15) are both provided with multiple angle adjustment components (2) corresponding to the multiple groups of clamping components. The angle adjustment assembly (2) includes two side plates (21) arranged on the outer peripheral wall of the second support (15), and an arc track (22) is arranged between the two side plates (21). One of the clamping jaws (13) and one of the corresponding connecting rods (16) of each group of the clamping assembly are respectively rotatably connected to the arc track (22) on the corresponding angle adjustment assembly (2), and can reciprocate along the arc track (22) toward the other clamping jaw (13) and the other connecting rod (16); The second support (15) is slidably sleeved on the first sleeve (11), and the lifting assembly (3) is arranged on the first sleeve (11) and is used to drive the second support (15) to move up and down; The lifting assembly (3) includes a first screw sleeve (31) rotatably arranged on the top of the second support (15), the second support (15) moves synchronously with the up and down movement of the first screw sleeve (31), and the first sleeve (11) is provided with an external thread groove adapted to the first screw sleeve (31); The lifting assembly (3) further comprises a second motor (32) disposed in the first sleeve (11), wherein an output end of the second motor (32) is provided with a second gear penetrating the first sleeve (11), and an inner tooth groove is vertically provided on the first screw sleeve (31) and meshes with the second gear, and the length of the inner tooth groove is not less than the distance that the first screw sleeve (31) can move up and down.

2. The adjustable chuck of the gas valve key according to claim 1, characterized in that: A second compression spring (18) is provided between the plurality of clamping jaws (13) and the first sleeve (11), and the second compression spring (18) is located between the connecting rod (16) and the first support (12).

3. The adjustable chuck of the gas valve key according to claim 1, characterized in that: A first motor (23) is provided on the connecting rod (16) rotatably arranged on the arc track (22), a first gear is provided at the output end of the first motor (23), and an external tooth groove meshing with the first gear is provided on the arc track (22) corresponding to the second support (15).

4. The adjustable chuck of the gas valve key according to claim 1, characterized in that: A universal connection assembly (4) is provided between the clamping mechanism (1) and the gas valve key handle, for maintaining torque transmission when the clamping mechanism (1) is deflected.

5. The adjustable chuck of the gas valve key according to claim 4, characterized in that: The universal connection assembly (4) includes a second sleeve (41) connected to the gas valve key handle, a third sleeve (42) is provided at the bottom of the second sleeve (41) and is plugged into the second sleeve (41) and can move up and down, the bottom of the third sleeve (42) is connected to the first sleeve (11), the inner diameter of the second sleeve (41) is larger than the outer diameter of the third sleeve (42), the third sleeve (42) is provided with a latch (43) that passes through the second sleeve (41) horizontally, the second sleeve (41) is provided with a strip hole for the latch (43) to move up and down, and the third sleeve (42) is rotatably provided with two screws for pushing the third sleeve (42) around the latch ( 43) a rotationally offset L-shaped top block (44), wherein the two L-shaped top blocks (44) are mirror-symmetrical about the axis of the second sleeve (41), a second screw sleeve (45) is rotatably provided on the second sleeve (41), an external thread groove adapted to the second screw sleeve (45) is provided on the second sleeve (41), a top ring (46) capable of moving up and down following the second screw sleeve (45) is rotatably provided at the bottom end of the second screw sleeve (45), the maximum distance between the top ends of the two L-shaped top blocks (44) is not less than the outer diameter of the top ring (46), at least one groove for avoiding the L-shaped top block (44) is provided at the bottom end of the top ring (46), and the top ring (46) is in the shape of an inverted cone; One end of the L-shaped top block (44) is upward and inclined in a direction away from the second sleeve (41), and the other end of the L-shaped top block (44) is downward and inclined in a direction close to the third sleeve (42) and abuts against the third sleeve (42). The rotation center of the L-shaped top block (44) is located in the middle. When the top ring (46) moves downward, it can enter the gap between the L-shaped top block (44) and the second sleeve (41) and squeeze the top of the L-shaped top block (44), so that when one of the L-shaped top blocks (44) is in the groove, the other L-shaped top block (44) abuts against the third sleeve (42) and pushes the third sleeve (42) to deflect to one side.

6. The adjustable chuck of the gas valve key according to claim 5, characterized in that: The bottom end of the top ring (46) is also provided with a protrusion (47) opposite to the groove. When the protrusion (47) moves downward, it can enter the gap between the L-shaped top block (44) and the second sleeve (41) and squeeze the top of the L-shaped top block (44).

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