Gas meter anti-theft connector and connector assembly
Patent Information
- Application Number
- CN202420339380.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-22
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2034-02-22
AI Technical Summary
The existing gas meter joint anti-theft devices are mostly one-time connections, and the structure must be damaged when disassembled, which increases the cost of use and safety risks.
An anti-theft joint for gas meters is designed, which uses an anti-theft cap, a magnetic block, and a retaining ring for the hole. Through the adsorption force of the external magnet, the joint can be safely disassembled without damaging the parts.
It prevents the joint from being disassembled at will when the gas meter is working, and can be safely disassembled when parts need to be replaced, which reduces the cost of use and improves safety.
Smart Images
Figure CN222379149U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of meter joints, and more specifically, to an anti-theft joint for a gas meter and a joint assembly. Background Art
[0002] At present, the measurement method of natural gas in households is mostly to connect the gas meter to the gas pipe, and rely on the pressure of the gas to do work to the outside, pushing the meter roller counter to count. The meter is usually connected to an air inlet pipe by a threaded connection, and the air inlet pipe is screwed onto the meter through the internal thread on the nut. For natural gas, the above threaded joint structure can be arbitrarily disassembled with a universal wrench. Some people can take advantage of the shortcomings of this joint to privately disassemble the meter, disassemble gas equipment and reroute gas pipelines, etc., which often causes gas leakage and gas theft, posing a great safety hazard and prone to serious accidents. For this situation, many gas connectors with anti-theft designs have been designed on the market. For example, a Chinese patent document discloses an anti-disassembly gas connector. When the connecting pipe is tightened on the gas meter through the nut, the outer sleeve is rotated, and the inner sleeve can be driven to be tightened on the gas meter through the elastic steel sheet. When the outer sleeve is rotated in the opposite direction, the elastic steel sheet will be deformed and slide out of the inclined groove on the outer sleeve, so that the inner sleeve cannot be driven to rotate. In other words, by rotating the nut outer sleeve on the anti-disassembly gas connector, the connecting pipe can only be tightened on the gas meter, but the connecting pipe cannot be unscrewed from the gas meter. For example, a Chinese patent document discloses a patent for an anti-theft and anti-disassembly gas meter corrugated connector, in which wedge-shaped groove structures are evenly distributed on the joint end faces of the outer shell and the nut sleeve, and a rolling structure is formed between the end face of the pipe and the end face of the nut sleeve. The connector can only be tightened in one direction during installation and cannot be loosened. In other words, it cannot be freely disassembled except for destructive disassembly after installation.
[0003] In actual use, the anti-theft meter connector is often a one-time connection. If the connector needs to be removed, it needs to be physically destroyed before it can be removed, which increases the cost of use for consumers and is also easy to damage the threaded interface of the meter. Utility Model Content
[0004] The purpose of the utility model is to overcome the problem that the existing meter joint anti-theft devices are mostly one-time connections, and the meter joint structure must be destroyed when it needs to be disassembled, and to provide a gas meter anti-theft joint and joint assembly. The utility model can prevent the joint from being disassembled at will when the gas meter is working, and can also use tools to disassemble the joint without damaging the parts when parts need to be replaced.
[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:
[0006] A gas meter anti-theft connector specifically comprises the following structure:
[0007] A first joint, used for sealing and connecting the gas pipe;
[0008] The second joint has one end detachably sealed with the second joint, and the other end is used for sealing connection with the gas meter; the outer surface of the second joint is also provided with a placement groove;
[0009] The anti-theft cap and the limiting sleeve are arranged on the outer sides of the first joint and the second joint, and the anti-theft cap can rotate relative to the second joint; the inner surface of the anti-theft cap is also provided with a lever groove, and the anti-theft cap can be rotated to make the notch positions of the placement groove and the lever groove relative to each other;
[0010] The magnetic block is movably placed in the placement slot;
[0011] The depth of the placement slot is greater than the depth of the lever slot, and the height of the magnetic block is greater than the depth of the lever slot and less than the depth of the placement slot; when the magnetic block is located in the lever slot, rotating the anti-theft cap can drive the second joint to rotate.
[0012] The utility model adds an anti-theft cap, and the anti-theft cap limit sleeve is arranged on the second joint. When the magnetic attraction block is located in the placement groove, since the height of the magnetic attraction block is smaller than the placement groove, the anti-theft cap can be rotated relative to the second joint. When the thief wants to disassemble by rotating the anti-theft cap, the rotation effect cannot be exerted on the first joint inside, so the threaded connection between the second joint and the gas meter cannot be released. When the gas meter is damaged or the connected gas pipe needs to be replaced, the maintenance personnel can place the external magnet on the outside of the anti-theft cap, and absorb the magnetic attraction block from the placement groove to the lever groove through the adsorption force of the magnet. Since the height of the magnetic attraction block is large, the thief cannot remove the anti-theft cap by rotating the anti-theft cap. The second joint is rotated by the anti-theft cap, and the second joint is driven by the magnetic block to rotate synchronously with the anti-theft cap. Therefore, the second joint rotates relative to the gas meter until the second joint is disconnected from the gas meter, thereby realizing disassembly. The utility model can prevent the joint from being disassembled at will when the gas meter is working, and can also remove the joint with tools without damaging the parts when the parts need to be replaced, thereby greatly reducing the use cost.
[0013] It should be noted that the first joint, the second joint and the anti-theft cap of the watch body in the present invention are all made of non-magnetic materials, such as hard plastic or copper. In this way, when disassembling, the external magnet can accurately and stably adsorb the magnetic block, so that the magnetic block can move in the placement slot and the lever slot.
[0014] Furthermore, a first limiting groove is provided on the inner periphery of the anti-theft cap, and a second limiting groove opposite to the first limiting groove is provided on the outer periphery of the second joint. A hole retaining ring is also provided between the first limiting groove and the second limiting groove for limiting the axial movement of the anti-theft cap relative to the second joint. When the hole retaining ring is not deformed, its inner and outer peripheries are respectively limited in the second limiting groove and the first limiting groove.
[0015] The utility model utilizes a hole retaining ring to limit the relative position of the anti-theft cap and the second joint. Since the hole retaining ring has a certain degree of telescopic elasticity, the hole retaining ring is sleeved on the outer periphery of the second joint. Under the action of the expansion elasticity, the hole retaining ring expands its inner diameter and is sleeved into the second joint until it slides and is stuck in the second limiting groove. After the anti-theft cap is inserted, the two clamp holes of the hole retaining ring can be clamped by a circlip pliers to make the hole retaining ring shrink in the second limiting groove until the first limiting groove of the anti-theft cap is stuck in the outer periphery of the hole retaining ring. After the circlip pliers are loosened, the inner and outer peripheries of the hole retaining ring are respectively limited in the second limiting groove and the first limiting groove, thereby limiting the axial movement of the anti-theft cap relative to the second joint. In this way, after the second joint is connected to the gas meter, the anti-theft cap cannot be detached from the outside of the second joint by an axial pulling action, thereby protecting the internal second joint and preventing theft.
[0016] Furthermore, the first joint is inserted into one end of the second joint and is threadedly connected to the second joint, and a first sealing member is also provided at the connection between the first joint and the second joint.
[0017] Furthermore, the second joint is a stepped hexagonal nut structure, and the slot of the placement slot is opened on the outer transition surface of the step. Since the threaded joint of the gas meter is generally at the top of the meter head, when the joint of the utility model is connected to the gas meter, the joint is installed vertically, and the placement slot is a slot with an opening facing upward. The magnetic block located therein naturally falls into the first placement slot, and only under the action of external magnetic force can the magnetic block be sucked into the upper lever slot.
[0018] Furthermore, the anti-theft cap is a stepped hexagonal nut structure, and the notch of the lever groove is set on the inner transition surface of the step. The external anti-theft cap is also set as a hexagonal nut structure, which can increase the difficulty of disassembly. After the magnetic block is adsorbed by the external magnet, a universal wrench is used to directly act on the anti-theft cap to achieve torque transmission and release the threaded connection between the second connector and the gas meter.
[0019] Furthermore, a transition chamfer is provided at the outer corner of the step of the second joint, so that the hole retaining ring can be better guided when inserted.
[0020] Furthermore, the number of the placement slots is at least two, and the placement slots are evenly distributed around the circumference of the second joint; the magnetic pole directions of the magnetic blocks placed in each placement slot remain consistent.
[0021] Multiple placement slots are arranged in the circumferential direction, and a magnetic block is arranged in each placement slot, so that after the external magnet simultaneously absorbs multiple magnetic blocks, multiple torque transmission points can be provided between the second joint and the anti-theft cap, thereby improving the force transmission efficiency and rotation stability. The magnetic pole directions of all magnetic blocks are kept consistent to ensure that during the magnetic absorption process, the external magnet can absorb all the magnetic blocks, and there will be no repulsion due to the same magnetic poles.
[0022] Furthermore, the magnetic block is a cylindrical magnet, and the placement slot and the lever slot are both cylindrical slots. The outer circumference of the cylindrical magnetic block is cylindrical without edges and corners, and it will not be easily damaged during the torque transmission process, thereby increasing the service life.
[0023] A joint assembly includes the gas meter anti-theft joint as described above, and also includes a second seal disposed in the inner cavity of the first joint and used to form a seal between the first joint and the gas pipe, a third seal disposed in the inner cavity of the second joint and used to form a seal between the second joint and the gas pipe, and a fourth seal disposed in the inner cavity of one end of the second joint connected to the gas meter and used to form a seal between the second joint and the gas meter. Since the utility model connects the gas meter and the gas pipe respectively, the sealing performance of the connection is also particularly important to prevent hidden dangers such as gas leakage. The joint assembly of the utility model is provided with a seal at the connection between each part, multiple seals are guaranteed, and further ensure that there is no leakage at the joint connection.
[0024] Furthermore, it also includes a limiting ring located in the inner cavity of the second joint, the limiting ring clamps the outer wall of the gas pipe, the end face of the limiting ring abuts against the end of the first joint and is used to limit the axial movement of the gas pipe relative to the first joint. The limiting ring that can clamp the gas pipe is used to limit the axial movement of the gas pipe relative to the first joint, thereby improving the connection strength and anti-theft effect between the two.
[0025] Compared with the prior art, the beneficial effects of the utility model are:
[0026] (1) The utility model adds an anti-theft cap. When thieves want to dismantle the gas meter by rotating the anti-theft cap, they cannot rotate the first joint inside, and therefore cannot release the threaded connection between the second joint and the gas meter. When the gas meter is damaged or the connected gas pipe needs to be replaced, maintenance personnel can place an external magnet on the outside of the anti-theft cap. Through the adsorption force of the magnet, the magnetic block is adsorbed from the placement groove to the lever groove. The magnetic blocks are respectively clamped in the placement groove and the lever groove. When the anti-theft cap is rotated at this time, the anti-theft cap and the second joint are temporarily integrated through the clamping of the magnetic block. When the anti-theft cap is rotated, the second joint can be driven to rotate synchronously. Therefore, the second joint rotates relative to the gas meter until the second joint is disconnected from the gas meter, thereby achieving disassembly.
[0027] (2) The utility model can prevent the joint from being disassembled at will when the gas meter is working, and can also remove the joint using tools without damaging the parts when parts need to be replaced, thereby greatly reducing the use cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] Figure 1 It is a three-dimensional schematic diagram of the anti-theft connector of the gas meter in the utility model;
[0029] Figure 2 It is a three-dimensional schematic diagram of another perspective of the anti-theft joint of the gas meter in the utility model;
[0030] Figure 3 This is a schematic diagram of the bottom structure of the anti-theft joint of the gas meter in the utility model;
[0031] Figure 4 This is a schematic diagram of the internal structure of the connection between the joint assembly and the gas pipe in the utility model;
[0032] Figure 5 It is an exploded view of the anti-theft joint of the gas meter in the utility model;
[0033] Figure 6 It is a structural schematic diagram of the anti-theft cap in the utility model.
[0034] The illustrations are as follows:
[0035] 1-first joint, 2-second joint, 21-placing groove, 22-second limiting groove, 23-transition chamfer, 3-anti-theft cap, 31-leverage groove, 32-first limiting groove, 4-magnetic block, 5-hole retaining ring, 6-first seal, 7-second seal, 8-third seal, 9-fourth seal, 10-limiting ring, 100-gas pipe. DETAILED DESCRIPTION
[0036] The utility model is further described below in conjunction with specific implementation methods. The drawings are only used for exemplary descriptions, and are only schematic diagrams, not actual pictures, and cannot be understood as limitations on this patent; in order to better illustrate the embodiments of the utility model, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.
[0037] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.
[0038] Example 1
[0039] like Figures 1 to 6 As shown, a gas meter anti-theft connector specifically includes the following structure:
[0040] A first joint 1, used for sealingly connecting a gas pipe 100;
[0041] The second joint 2 has one end detachably sealed with the second joint 2 and the other end is used for sealingly connecting with the gas meter; the outer surface of the second joint 2 is also provided with a placement groove 21;
[0042] The anti-theft cap 3 is limitedly sleeved on the outer sides of the first joint 1 and the second joint 2, and the anti-theft cap 3 can rotate relative to the second joint 2; the inner surface of the anti-theft cap 3 is also provided with a lever groove 31, and the anti-theft cap 3 can be rotated so that the notches of the placement groove 21 and the lever groove 31 are opposite to each other;
[0043] The magnetic block 4 is movably placed in the placement slot 21;
[0044] The depth of the placement groove 21 is greater than the depth of the lever groove 31 , and the height of the magnetic block 4 is greater than the depth of the lever groove 31 and less than the depth of the placement groove 21 ; when the magnetic block 4 is located in the lever groove 31 , rotating the anti-theft cap 3 can drive the second joint 2 to rotate.
[0045] The present application adds an anti-theft cap 3, and the anti-theft cap 3 is limitedly sleeved on the second joint 2. When the magnetic block 4 is located in the placement groove 21, since the height of the magnetic block 4 is smaller than the placement groove 21, the anti-theft cap 3 can be rotated relative to the second joint 2. When the thief wants to disassemble it by rotating the anti-theft cap 3, the rotation effect cannot be exerted on the internal first joint 1, so the threaded connection between the second joint 2 and the gas meter cannot be released; when the gas meter is damaged or the connected gas pipe 100 needs to be replaced, the maintenance personnel can place an external magnet on the outside of the anti-theft cap 3, and through the adsorption force of the magnet, the magnetic block 4 is adsorbed from the placement groove 21 to the lever groove 31. Due to the height of the magnetic block 4 The depth is greater than the lever groove 31 and smaller than the placement groove 21. At the same time, the depth of the placement groove 21 is greater than the lever groove 31, so the magnetic block 4 will be respectively clamped in the placement groove 21 and the lever groove 31. When the anti-theft cap 3 is rotated at this time, the anti-theft cap 3 and the second joint 2 are temporarily formed into one body through the clamping of the magnetic block 4. When the anti-theft cap 3 is rotated, the second joint 2 can be driven to rotate synchronously. Therefore, the second joint 2 rotates relative to the gas meter until the second joint 2 is disconnected from the gas meter, thereby realizing disassembly. The present application can prevent the joint from being disassembled at will when the gas meter is working, and can also use tools to remove the joint without damaging the parts when parts need to be replaced, thereby greatly reducing the cost of use.
[0046] It should be noted that in this embodiment, the first joint 1, the second joint 2 and the anti-theft cap 3 of the watch body are all made of non-magnetic materials, such as hard plastic or copper. In this way, when disassembling, the external magnet can accurately and stably adsorb the magnetic block 4, so that the position of the magnetic block 4 in the placement slot 21 and the lever slot 31 can be moved.
[0047] like Figure 2 and Figure 6 As shown, a first limiting groove 32 is provided on the inner periphery of the anti-theft cap 3, and a second limiting groove 22 opposite to the first limiting groove 32 is provided on the outer periphery of the second joint 2. A hole retaining ring 5 is also provided between the first limiting groove 32 and the second limiting groove 22 for limiting the axial movement of the anti-theft cap 3 relative to the second joint 2. When the hole retaining ring 5 is not deformed, its inner and outer peripheries are respectively limited in the second limiting groove 22 and the first limiting groove 32.
[0048] The present application utilizes the hole retaining ring 5 to relatively limit the anti-theft cap 3 and the second joint 2. Since the hole retaining ring 5 has a certain telescopic elasticity, the hole retaining ring 5 is sleeved on the outer periphery of the second joint 2. Under the action of the expansion elasticity, the hole retaining ring 5 expands the inner diameter and is sleeved into the second joint 2 until it slides and is stuck in the second limiting groove 22. After the anti-theft cap 3 is inserted, the two clamp holes of the hole retaining ring 5 can be clamped with a circlip pliers to make the hole retaining ring 5 shrink in the second limiting groove 22 until the first limiting groove 32 of the anti-theft cap 3 is stuck in the outer periphery of the hole retaining ring 5. After loosening the circlip pliers, the inner and outer peripheries of the hole retaining ring 5 are respectively limited in the second limiting groove 22 and the first limiting groove 32, which can limit the axial movement of the anti-theft cap 3 relative to the second joint 2. In this way, after the second joint 2 is connected to the gas meter, the anti-theft cap 3 cannot be detached from the outside of the second joint 2 by an axial pulling action, thereby protecting the internal second joint 2 and preventing theft.
[0049] like Figure 2 and Figure 4 As shown, in this embodiment, the second limiting groove 22 is an open groove provided on the outer periphery of the end of the second connector, so that there is enough space between the second connector 2 and the anti-theft cap 3 for the circlip pliers to operate.
[0050] like Figure 4 As shown, the first joint 1 is inserted into one end of the second joint 2 and is threadedly connected to the second joint 2 . A first sealing member 6 is also provided at the connection between the first joint 1 and the second joint 2 .
[0051] In this embodiment, the first sealing member 6 is an O-ring, and the inner and outer walls of the second joint 2 and the first joint 1 are mostly butted at their ends, so the O-ring has a better fitting effect and achieves better sealing.
[0052] like Figure 1 and Figure 2 As shown, the second joint 2 is a stepped hexagonal nut structure, and the slot of the placement slot 21 is opened on the outer transition surface of the step. Since the threaded joint of the gas meter is generally at the top of the meter head, when the joint of the utility model is connected to the gas meter, the joint is installed vertically, and the placement slot 21 is a slot with an opening facing upward. The magnetic block located therein naturally falls into the first placement slot 21. Only under the action of external magnetic force can the magnetic block be sucked into the upper lever slot 31.
[0053] like Figure 1 and Figure 2 As shown, the anti-theft cap 3 is a stepped hexagonal nut structure, and the notch of the lever groove 31 is set on the inner transition surface of the step. The external anti-theft cap 3 is also set as a hexagonal nut structure, which can increase the difficulty of disassembly. After the magnetic block 4 is attracted by the external magnet, a universal wrench is used to directly act on the anti-theft cap 3 to realize torque transmission, and release the threaded connection between the second connector and the gas meter.
[0054] like Figure 5 As shown, a transition chamfer 23 is also provided at the outer corner of the step of the second joint 2. The transition chamfer 23 is provided to facilitate better guidance of the hole retaining ring 5 when it is inserted.
[0055] Example 2
[0056] This embodiment is similar to Embodiment 1, except that in this embodiment:
[0057] like Figure 5 As shown, there are four placement slots 21 , which are evenly distributed around the circumference of the second joint 2 ; the magnetic pole directions of the magnetic blocks 4 placed in each placement slot 21 are kept consistent.
[0058] A plurality of placement grooves 21 are arranged in the circumferential direction, and a magnetic block 4 is arranged in each placement groove 21, so that after the external magnet simultaneously absorbs the plurality of magnetic blocks 4, a plurality of torque transmission points can be provided between the second joint 2 and the anti-theft cap 3, thereby improving the force transmission efficiency and the rotation stability. The magnetic pole directions of all the magnetic blocks 4 are kept consistent to ensure that during the magnetic absorption process, the external magnet can absorb all the magnetic blocks 4, and there will be no repulsion due to the same magnetic poles.
[0059] like Figure 5 As shown, the magnetic block 4 is a cylindrical magnet, and the placement slot 21 and the lever slot 31 are both cylindrical slots. The outer circumference of the cylindrical magnetic block 4 is cylindrical, without edges and corners, and it will not be easily damaged during the torque transmission process, thereby increasing the service life.
[0060] The other structures and principles of this embodiment are the same as those of Embodiment 1.
[0061] Example 3
[0062] like Figure 4 As shown, a joint assembly includes the gas meter anti-theft joint as described in Example 2 above, and also includes a second sealing member 7 arranged in the inner cavity of the first joint 1 and used to form a seal between the first joint 1 and the gas pipe 100, a third sealing member 8 arranged in the inner cavity of the second joint 2 and used to form a seal between the second joint 2 and the gas pipe 100, and a fourth sealing member 9 arranged in the inner cavity of one end of the second joint 2 connected to the gas meter and used to form a seal between the second joint 2 and the gas meter.
[0063] In this embodiment, the second sealing member 7 is an F-type sealing ring embedded in the inner wall of the first joint 1. Since the first sealing member 6 is located between the first joint 1 and the gas pipe 100, the gas pipe 100 has an outer layer and has a certain flexibility. The F-type sealing ring has two sealing lips, and the ends of the sealing lips have better adhesion and better sealing performance; the third sealing member 8 is an L-shaped sealing ring with an inner step, and the end of the gas pipe 100 is inserted in the inner cavity of the third sealing member 8 to achieve lateral sealing and end face sealing of the gas pipe 100, which can have a better sealing effect; the fourth sealing member 9 is an annular gasket, which can better fit tightly between the end of the gas meter connecting nut and the inner cavity end face of the pipe body connector 2.
[0064] Furthermore, it also includes a limiting ring 10 located in the inner cavity of the second joint 2, the limiting ring 10 clamps the outer wall of the gas pipe 100, the end face of the limiting ring 10 abuts against the end of the first joint 1 and is used to limit the axial movement of the gas pipe 100 relative to the first joint 1. The limiting ring 10 that can clamp the gas pipe 100 is used to limit the axial movement of the gas pipe 100 relative to the first joint 1, thereby improving the connection strength and anti-theft effect between the two.
[0065] In this embodiment, the limit ring 10 is formed by splicing two semicircular arc blocks. The limit ring 10 is generally made of copper metal, so it has no deformation performance, and the splicing form can more conveniently clamp the outer wall of the gas pipe 100.
[0066] Since the utility model is connected to the gas meter and the gas pipe 100 respectively, the sealing performance of the connection is also particularly important to prevent hidden dangers such as gas leakage. The joint assembly of the utility model is equipped with sealing parts at the connection between each part to ensure the sealing in multiple ways, further ensuring that there is no leakage at the joint connection.
[0067] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not intended to limit the implementation methods of the utility model. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the claims of the utility model.
Claims
1. A gas meter anti-theft connector, characterized in that: The specific structure includes the following: A first joint (1) for sealingly connecting a gas pipe (100); A second joint (2), one end of which is detachably and hermetically connected to the second joint (2), and the other end of which is used for hermetically connecting to a gas meter; a placement groove (21) is also provided on the outer surface of the second joint (2); The anti-theft cap (3) is limitedly sleeved on the outer sides of the first joint (1) and the second joint (2), and the anti-theft cap (3) can rotate relative to the second joint (2); the inner surface of the anti-theft cap (3) is also provided with a lever groove (31), and the anti-theft cap (3) can be rotated so that the notches of the placement groove (21) and the lever groove (31) are opposite to each other; A magnetic attraction block (4) movably placed in the placement slot (21); The depth of the placement groove (21) is greater than the depth of the lever groove (31), and the height of the magnetic block (4) is greater than the depth of the lever groove (31) and less than the depth of the placement groove (21); when the magnetic block (4) is located in the lever groove (31), rotating the anti-theft cap (3) can drive the second joint (2) to rotate.
2. A gas meter anti-theft joint according to claim 1, characterized in that: A first limiting groove (32) is provided on the inner periphery of the anti-theft cap (3), and a second limiting groove (22) is provided on the outer periphery of the second joint (2) and is opposite to the first limiting groove (32). A hole retaining ring (5) is provided between the first limiting groove (32) and the second limiting groove (22) for limiting the axial movement of the anti-theft cap (3) relative to the second joint (2). When the hole retaining ring (5) is not deformed, its inner and outer peripheries are respectively limited in the second limiting groove (22) and the first limiting groove (32).
3. The gas meter anti-theft joint according to claim 1, characterized in that: The first joint (1) is inserted into one end of the second joint (2) and is threadedly connected to the second joint (2); a first sealing member (6) is also provided at the connection between the first joint (1) and the second joint (2).
4. The anti-theft joint for a gas meter according to claim 1, characterized in that: The second joint (2) is a stepped hexagonal nut structure, and the notch of the placement groove (21) is arranged on the outer transition surface of the step.
5. A gas meter anti-theft joint according to claim 4, characterized in that: The anti-theft cap (3) is a stepped hexagonal nut structure, and the notch of the lever groove (31) is arranged on the inner side transition surface of the step.
6. A gas meter anti-theft joint according to claim 4, characterized in that: A transition chamfer (23) is also provided at the outer corner of the step of the second joint (2).
7. The anti-theft joint for a gas meter according to claim 1, characterized in that: The number of the placement slots (21) is at least two, and the placement slots (21) are evenly distributed around the circumference of the second joint (2); the magnetic pole directions of the magnetic attraction blocks (4) placed in each placement slot (21) remain consistent.
8. The anti-theft joint for a gas meter according to claim 7, characterized in that: The magnetic attraction block (4) is a cylindrical magnet, and the placement groove (21) and the lever groove (31) are both cylindrical slot holes.
9. A joint assembly, characterized in that: It comprises a gas meter anti-theft connector as claimed in any one of claims 1 to 8, and also comprises a second sealing member (7) arranged in the inner cavity of the first connector (1) and used to form a seal between the first connector (1) and the gas pipe (100), a third sealing member (8) arranged in the inner cavity of the second connector (2) and used to form a seal between the second connector (2) and the gas pipe (100), and a fourth sealing member (9) arranged in the inner cavity of one end of the second connector (2) connected to the gas meter and used to form a seal between the second connector (2) and the gas meter.
10. A joint assembly according to claim 9, characterized in that: It also includes a limiting ring (10) located in the inner cavity of the second joint (2), the limiting ring (10) clamping the outer wall of the gas pipe (100), the end face of the limiting ring (10) abutting against the end of the first joint (1) and used to limit the axial movement of the gas pipe (100) relative to the first joint (1).