CN211425565U

CN211425565U - Anti-theft gas meter connector

Info

Publication number: CN211425565U
Application number: CN201922483560.8U
Authority: CN
Inventors: 忻明杰
Original assignee: Ningbo Xinjie Gas Appliances Industrial Co ltd
Current assignee: Ningbo Xinjie Gas Appliances Industrial Co ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-09-04
Anticipated expiration: 2029-12-30

Abstract

The utility model discloses an anti-theft gas meter connector, include the joint body that links to each other with the pipe fitting and with gauge tool threaded connection's nut, the joint body is worn to establish in the nut, the outside of nut is equipped with the theftproof cover of being made by non-magnetic material, be equipped with the centre bore that runs through the theftproof cover on the theftproof cover, be equipped with an annular groove on the outer wall of nut, radially be equipped with the mounting hole along the nut on the annular groove, be equipped with first magnet and elastic component in the mounting hole, the one end of elastic component offsets with the hole bottom of mounting hole, the other end of elastic component offsets with the one end of first magnet, be equipped with the seat hole that is used for going into magnet card on the inner wall of theftproof cover, be equipped with the groove of borrowing that the managers of being convenient for dismantled the theftproof cover on the theftproof cover, the theftproof gas meter. The utility model discloses a can effectively prevent when unoperated state from dismantling, can guarantee to be convenient for professional management personnel to dismantle fast under the condition of not destroying the part when operating condition again.

Description

Anti-theft gas meter connector

Technical Field

The utility model relates to a meter connector technical field, what specifically say is an anti-theft gas meter connector.

Background

At present, the gas meter connector all includes a connecting pipe usually, a nut of rotatable connection of the lower extreme of connecting pipe, screw the connecting pipe on the gas meter through the internal thread on the nut, above this kind of structure can be through the arbitrary dismantlement nut of general spanner, often cause the emergence of revealing the gas and stealing the gas phenomenon, bring the loss for the gas supply enterprise, this kind of condition also gives the user privately dismantles gas equipment, the gas pipeline is taken over a business, and lawless persons steals gas and provides convenience, this kind of condition is owing to non-professional operation, the dismantlement process is not standard, very big potential safety hazard has, the malignant accident easily takes place.

To this end, many gas meter connectors with additional anti-theft sleeves are designed on the market, for example, the patent with publication number CN203396438U and name "anti-disassembly gas meter connector" published on the website of the national intellectual property office, which includes a connecting pipe and a nut, the nut is rotatably connected to the lower end of the connecting pipe, a sealing ring is arranged on the lower end face of the connecting pipe, and an external thread is arranged on the upper end of the connecting pipe, wherein the nut includes an outer sleeve and an inner sleeve, the outer sleeve is sleeved outside the inner sleeve, an internal thread is arranged on the inner cavity of the inner sleeve, an annular groove is arranged on the outer circumferential wall of the inner sleeve, a plurality of slots are evenly distributed on the outer circumferential wall of the inner sleeve positioned in the annular groove, a plurality of inclined plane grooves are evenly distributed on the inner circumferential wall of the outer sleeve, an elastic steel sheet bent into a right angle is inserted in each, the clamp spring is clamped in the first annular clamp groove, a second annular clamp groove corresponding to the first annular clamp groove is arranged at the lower part of the inner peripheral wall of the outer sleeve, and the clamp spring is simultaneously positioned in the second annular clamp groove.

However, the disassembly-proof gas meter connector with the structure has the following defects: when the connecting pipe is screwed on the gas meter through the screw cap, the outer sleeve is rotated, the inner sleeve can be driven to be screwed on the gas meter through the elastic steel sheet, when the outer sleeve is rotated again in the opposite direction, the elastic steel sheet can deform and slide out of the inclined groove on the outer sleeve, so that the inner sleeve cannot be driven to rotate, in other words, the connecting pipe can only be screwed on the gas meter by rotating the screw cap outer sleeve on the anti-disassembly gas meter connector, but the connecting pipe cannot be screwed off the gas meter.

In addition, current anti-disassembly gas table connects, need dismantle when professional managers need just inspect or maintain the product, and often the dismantlement process is more loaded down with trivial details, needs to use specialized tool, dismantles like special spanner, and working strength is great.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is, overcome the defect of above prior art, provide one kind can effectively prevent to dismantle when unoperated state, can guarantee to not destroy the theftproof gas meter connector that professional managers of being convenient for dismantled fast under the condition of part again when operating condition.

The technical solution of the utility model is that, a theftproof gas meter connector with following structure is provided: comprises a joint body connected with a pipe fitting and a nut in threaded connection with a meter, wherein the joint body is arranged in the nut in a penetrating way, the outside of the screw cap is provided with an anti-theft sleeve made of non-magnetic material, the anti-theft sleeve is provided with a central hole penetrating through the anti-theft sleeve, the outer wall of the nut cap is provided with an annular groove, the annular groove is provided with a mounting hole along the radial direction of the nut cap, the mounting hole is internally provided with a first magnet and an elastic piece used for pushing the first magnet outwards towards the mounting hole, one end of the elastic piece is propped against the bottom of the mounting hole, the other end of the elastic piece is propped against one end of the first magnet, offer the seat hole that is used for going into first magnet card on the inner wall of theftproof cover, set up the groove of borrowing of being convenient for managers to dismantle the theftproof cover on the theftproof cover, theftproof gas table connects still including being used for the dismantlement structure with nut and theftproof cover separation.

After the structure above the adoption, the utility model relates to a theftproof gas table connects compares with prior art, has following advantage: after the nut is connected with the connector body, the anti-theft sleeve is sleeved on the nut and is screwed down to press the anti-theft sleeve until the inner wall of the anti-theft sleeve is abutted against the upper end face of the nut, in the process, the first magnet enters the seating hole under the elastic action of the elastic piece, namely, one end of the first magnet is positioned in the mounting hole and abutted against the elastic piece, and the other end of the first magnet is clamped into the seating hole, so that the mutual connection and the limiting of the anti-theft sleeve and the nut are realized, the anti-theft and anti-disassembly functions of the gas meter connector in a non-working state are effectively realized, the anti-theft gas meter connector further comprises a disassembly structure for separating the nut from the anti-theft sleeve, the gas meter connector is disassembled under the condition that the parts are not damaged in the working state, the anti-theft sleeve is convenient for a manager to disassemble the anti-theft sleeve, and after the mutual connection and the limiting of the anti-theft sleeve and, professional use of management personnel instrument is dismantled theftproof cover and nut fast even if be convenient for the quick theftproof gas table joint of professional dismantles, reduces professional management personnel's working strength, improves work efficiency.

Preferably, the force-borrowing groove comprises an axial groove and a radial groove which are communicated with each other, the axial groove and the radial groove are perpendicular to each other, the radial groove is communicated with the central hole, and a V-shaped notch communicated with the radial groove is arranged at the lowest end of the radial groove. Through setting up the axial groove and the radial groove that borrow the power groove and include mutual intercommunication, axial groove and radial groove are mutually perpendicular, and the minimum end play in radial groove is provided with "V" type incision for with extracting tool's edge of a knife looks adaptation, the professional management personnel of being convenient for dismantle, improve work efficiency.

Preferably, the detaching structure comprises a detaching ring sleeved outside the anti-theft sleeve, the detaching ring is provided with a detaching hole corresponding to the mounting hole in a matched manner, a second magnet is arranged in the detaching hole, and the magnetic pole of the first magnet is opposite to the magnetic pole of the second magnet in the same pole arrangement manner. Dismantle the structure including cup jointing at the outside dismantlement ring of theftproof cover through setting up, and the dismantlement hole has been seted up on the dismantlement ring, the dismantlement hole matches and the position corresponds with the mounting hole, and dismantle downthehole second magnet that is provided with, because the magnetic pole of first magnet is relative for homopolar with the magnetic pole arrangement mode of second magnet, utilize the magnetic force effect between first magnet and the second magnet, like the same polarity repulsion between the magnetic pole promptly, make the magnetic pole homopolar of first magnet and second magnet produce mutual repulsion force relatively, second magnet makes first magnet to the mounting hole displacement promptly, push back first magnet in the mounting hole, thereby make the theftproof cover break away from the restriction of first magnet, spacing connection between theftproof cover and the nut promptly is relieved, realize dismantling the gas meter joint under the condition of guaranteeing not to destroy the part when operating condition.

Preferably, the first magnet and the second magnet are in clearance fit in the mounting hole and the dismounting hole respectively. Through setting up first magnet and second magnet respectively clearance fit at the mounting hole with dismantle downtheholely, first magnet can remove in the mounting hole promptly, second magnet can remove in the dismantlement downthehole, makes things convenient for first magnet and second magnet to take place magnetic force effect and take place the displacement, is convenient for realize the dismantlement to the gas meter joint.

Preferably, when the annular groove is positioned outside the lower end face of the anti-theft sleeve, a fixing pad made of plastics and used for preventing the anti-theft sleeve from being directly clamped with the screw cap before assembly is sleeved in the annular groove. Outside setting up the lower terminal surface that the annular groove is located the theftproof cover, before the assembly promptly, set up the fixed bolster in the annular groove, prevent the direct joint of theftproof cover on the nut, guarantee the normal clear of assembling process.

Preferably, one end of the joint body, which is connected with the nut, is provided with a blocking edge, and the joint body is abutted to the nut through the blocking edge after penetrating through the nut. One end connected with the nut through the joint body is provided with a blocking edge, and the joint body is propped against the nut through the blocking edge after penetrating through the nut, thereby being convenient for the connection of the gas meter.

Preferably, a sealing ring is arranged at the blocking edge of the joint body. The sealing ring is arranged on the blocking edge of the joint body, so that the sealing performance of the gas meter joint is guaranteed.

Preferably, an external thread is formed on the outer peripheral wall of the nut, and an internal thread matched with the external thread on the nut is formed on the inner wall of the anti-theft sleeve. Form the external screw thread on the periphery wall through setting up the nut, form the internal thread on the inner wall of theftproof cover, external screw thread and internal thread phase-match for theftproof cover and nut close soon each other, make to connect more closely between theftproof cover and the nut.

Preferably, the elastic member is a spring or an elastic metal sheet. The elastic piece is a spring or an elastic metal sheet, so that elastic acting force can be applied to the first magnet conveniently.

Preferably, the joint body is further provided with a pressure measuring assembly, the pressure measuring assembly comprises a pressure measuring pipe which is formed on the outer wall of the joint body and communicated with the joint body, a valve core is arranged in the pressure measuring pipe, a nut is screwed on the outer end of the pressure measuring pipe, a gasket is arranged between the valve core and the nut, and a valve needle is arranged at the outer end of the valve core. Because be had pressure in the gas pipeline, and prior art pipeline can not test its pressure, through setting up pressure measurement subassembly to the realization tests the atmospheric pressure size in the gas pipeline, in addition through setting up a valve needle, can make valve needle plug tight or send out through the nut rotation, thereby realize aerifing or discharging the gas in the gas pipeline.

Drawings

Fig. 1 is the utility model relates to a sectional structure schematic diagram of theftproof gas table joint.

Fig. 2 is the utility model relates to a nut's among theftproof gas table joint structural schematic.

Fig. 3 is the utility model relates to a theftproof cover among theftproof gas table joint looks sideways at schematic structure.

Fig. 4 is a schematic view of the overlooking structure of the anti-theft sleeve in the anti-theft gas meter connector of the present invention.

Fig. 5 is a schematic structural diagram of a second embodiment of the anti-theft gas meter connector of the present invention.

Fig. 6 is the utility model relates to a dismantle structure's in theftproof gas table connects structural schematic diagram.

As shown in the figure:

1. the joint comprises a joint body, 2, a nut, 3, an anti-theft sleeve, 4, an annular groove, 5, a mounting hole, 6, an elastic piece, 7, a first magnet, 8, a seating hole, 9, a force-borrowing groove, 10, an axial groove, 11, a radial groove, 12, a central hole, 13, a V-shaped notch, 14, a dismounting ring, 15, a dismounting hole, 16, a second magnet, 17, a fixing pad, 18, a blocking edge, 19, a sealing ring, 20, a pressure measuring pipe, 21, a valve core, 22, a nut, 23, a gasket, 24, external threads, 25 and internal threads.

Detailed Description

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed for practical use in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the terms "first", "second", etc. are used to define the components, and are used only for better describing the components, and if not otherwise stated, the terms have no special meaning, and thus should not be interpreted as limiting the scope of the present invention.

It should be noted that, in the drawings of the specification, fig. 1 and fig. 5 are schematic structural diagrams when the fixing pad 17 of the present invention is provided, that is, a schematic structural diagram before assembly, and fig. 2 specifically shows a schematic structural diagram of the nut after the fixing pad 17 is removed.

Example one

Referring to fig. 1, 2, 3, 4, 5 and 6, the anti-theft gas meter connector of the present invention includes a connector body 1 connected to a pipe and a nut 2 connected to a meter by a thread, wherein the connector body 1 is inserted into the nut 2, an anti-theft sleeve 3 made of a non-magnetic material is disposed outside the nut 2, the anti-theft sleeve 3 is provided with a central hole 12 penetrating through the anti-theft sleeve 3, an annular groove 4 is disposed on an outer wall of the nut 2, a mounting hole 5 is radially disposed on the annular groove 4 along the nut 3, a first magnet 7 and an elastic member 6 for pushing the first magnet 7 out of the mounting hole 5 are disposed in the mounting hole 5, one end of the elastic member 6 abuts against a bottom of the mounting hole 5, the other end of the elastic member 6 abuts against one end of the first magnet 7, a seating hole 8 for clamping the first magnet 7 is disposed on an inner wall of the anti-theft sleeve 3, the anti-theft gas meter connector is characterized in that a force-borrowing groove 9 convenient for a manager to detach the anti-theft sleeve 3 is formed in the anti-theft sleeve 3, and the anti-theft gas meter connector further comprises a detaching structure used for separating the screw cap 2 from the anti-theft sleeve 3.

After the nut 2 is connected with the connector body 1, the anti-theft sleeve 3 is sleeved on the nut 2, the anti-theft sleeve 3 is screwed down and pressed until the inner wall of the anti-theft sleeve 3 is abutted against the upper end face of the nut 2, in the process, the first magnet 7 enters the seating hole 8 under the elastic action of the elastic piece 6, namely, one end of the first magnet 7 is positioned in the mounting hole 5 and abutted against the elastic piece 6, the other end of the first magnet 7 is clamped into the seating hole 8, so that the mutual connection and limiting of the anti-theft sleeve 3 and the nut 2 are realized, the anti-theft and anti-disassembly functions of the gas meter connector in a non-working state are effectively realized, the anti-theft gas meter connector also comprises a disassembly structure for separating the nut 2 from the anti-theft sleeve 3, the gas meter connector is disassembled under the condition that parts are not damaged in the working state, the anti-theft sleeve 3 is provided with a force-borrowing groove 9 convenient for a manager to disassemble the anti-theft sleeve 3, realize after the interconnect of theftproof cover 3 and nut 2 is spacing to be relieved, professional management personnel use tools dismantle theftproof cover 3 and nut 2 fast, even if be convenient for the quick theftproof gas meter of professional management personnel connects and dismantles, reduce professional management personnel's working strength, improve work efficiency.

Specifically, referring to fig. 3 and 4, the force-borrowing groove 9 includes an axial groove 10 and a radial groove 11 which are communicated with each other, the axial groove 10 and the radial groove 11 are perpendicular to each other, the radial groove 11 is communicated with the central hole 12, and a V-shaped notch 13 communicated with the radial groove 11 is arranged at the lowest end of the radial groove 11. Specifically, in this embodiment, the number of borrowing force groove 9 is 2, and through setting up borrowing force groove 9 including the axial slot 10 and the radial slot 11 of intercommunication each other, axial slot 10 and radial slot 11 mutually perpendicular, and the minimum end play in radial slot 11 is provided with "V" type incision 13 for with the edge of a knife looks adaptation of extracting tool (like plain end screwdriver), the professional managers of being convenient for dismantle, improve work efficiency.

Specifically, referring to fig. 6, the detaching structure includes a detaching ring 14 sleeved outside the anti-theft cover 3, the detaching ring 14 is provided with a detaching hole 15 corresponding to the mounting hole 5, a second magnet 16 is disposed in the detaching hole 15, and the magnetic poles of the first magnet 7 and the second magnet 16 are arranged in a manner of homopolar opposition. Specifically, in the present embodiment, the number of the mounting holes 5 and the dismounting holes 15 is 4, that is, the number of the first magnets 7 and the second magnets 16 is also 4; the disassembly structure is arranged outside the anti-theft sleeve when professional managers need to disassemble the gas meter connector, namely, the disassembly structure is not arranged on the gas meter connector in a non-working state. By arranging the dismounting structure comprising a dismounting ring 14 sleeved outside the anti-theft sleeve 3, wherein the dismounting ring 14 is provided with a dismounting hole 15, the dismounting hole 15 is matched with the mounting hole 5 and corresponds to the mounting hole in position, a second magnet 16 is arranged in the dismounting hole 15, since the magnetic poles of the first magnet 7 and the second magnet 16 are arranged in such a manner as to be homopolar to each other, by the action of the magnetic force between the first magnet 7 and the second magnet 16, i.e. the like poles repel each other, so that the like poles of the first magnet 7 and the second magnet 16 oppose each other to generate a mutual repulsion force, that is, the second magnet 16 displaces the first magnet 7 toward the mounting hole 5, and pushes the first magnet 7 back into the mounting hole 5, so that the antitheft sleeve 3 is released from the restriction of the first magnet 7, the spacing connection between the anti-theft cover 3 and the nut 2 is released, and the gas meter connector is detached under the condition that the parts are not damaged in the working state.

Further, the first magnet 7 and the second magnet 16 are clearance-fitted in the mounting hole 5 and the dismounting hole 15, respectively. Through setting up first magnet 7 and second magnet 16 respectively clearance fit in mounting hole 5 and dismounting hole 15, first magnet 7 can remove in mounting hole 5 promptly, and second magnet 16 can remove in dismounting hole 15, makes things convenient for first magnet 7 and second magnet 16 to take place magnetic force effect and take place the displacement, is convenient for realize the dismantlement to the gas meter joint.

Further, referring to fig. 1, when the annular groove 4 is located outside the lower end surface of the anti-theft cover 3, a fixing pad 17 made of plastic for preventing the anti-theft cover 3 from being directly clamped with the nut 2 before assembly is sleeved in the annular groove 4. When the assembly, take off fixing pad 17 earlier, lie in the theftproof cover 3 through setting up annular groove 4 outside the lower terminal surface, promptly before the assembly, set up fixing pad 17 in annular groove 4, prevent that the direct joint of theftproof cover 3 from guaranteeing the normal clear of assembling process on nut 2.

In order to facilitate the connection of the meter, a blocking edge 18 is arranged at one end of the connector body 1 connected with the nut 2, and the connector body 1 is abutted against the nut 2 through the blocking edge 18 after penetrating through the nut 2.

In order to ensure good sealing performance of the gas meter connector, a sealing ring 19 is arranged at a blocking edge 18 of the connector body 1.

Wherein, be formed with external screw thread 24 on the periphery wall of nut 2, be formed with on the inner wall of theftproof cover 3 with external screw thread 24 assorted internal thread 25 on the nut 2. Form external screw thread 24 on the periphery wall through setting up nut 2, form internal thread 25 on the inner wall of theftproof cover 3, external screw thread 24 and internal thread 25 phase-match for theftproof cover 3 and nut 2 close soon each other, make to connect more closely between theftproof cover 3 and the nut 2.

Further, the elastic member 6 is a spring or an elastic metal sheet. By providing the elastic member 6 as a spring or an elastic metal piece, it is convenient to apply an elastic force to the first magnet 7.

The working principle is as follows: to sum up, the utility model relates to an anti-theft gas meter connector, 2 at the nut with connect 1 back of body, overlap 3 covers the theftproof on nut 2, down twist and press theftproof cover 3, inner wall and nut 2's up end counterbalance up theftproof cover 3, in this process, first magnet 7 gets into under the spring action of elastic component 6 and sits downthehole 8, the one end of first magnet 7 is located mounting hole 5 and offsets with elastic component 6 promptly, the 7 other ends of first magnet are gone into by the card and sit downthehole 8, thereby realized that the interconnect of theftproof cover 3 and nut 2 is spacing, the effectual theftproof dismantlement prevention function that gas meter connector when having realized the non-operating condition. When the meter connector is to be disassembled, namely the screw cap 2 is separated from the anti-theft sleeve 3, firstly, the disassembling ring 14 is sleeved outside the anti-theft sleeve 3, the disassembling ring 14 is provided with a disassembling hole 15, the disassembling hole 15 is matched with the mounting hole 5 and corresponds to the mounting hole in position, a second magnet 16 is arranged in the disassembling hole 15, since the magnetic poles of the first magnet 7 and the second magnet 16 are arranged in such a manner as to be homopolar to each other, by the action of the magnetic force between the first magnet 7 and the second magnet 16, i.e. the like poles repel each other, so that the like poles of the first magnet 7 and the second magnet 16 oppose each other to generate a mutual repulsion force, that is, the second magnet 16 displaces the first magnet 7 toward the mounting hole 5, pushes the first magnet 7 back into the mounting hole 5, so that the anti-theft sleeve 3 is released from the restriction of the first magnet 7, i.e. the spacing connection between the anti-theft sleeve 3 and the nut 2 is released. Subsequently, the anti-theft sleeve 3 is provided with a force borrowing groove 9 convenient for a manager to disassemble the anti-theft sleeve 3, the force borrowing groove 9 comprises an axial groove 10 and a radial groove 11 which are communicated with each other, the axial groove 10 is perpendicular to the radial groove 11, and the lowest end of the radial groove 11 is provided with a V-shaped notch 13 which is matched with a knife edge of a disassembling tool (such as a flat screwdriver), so that the professional manager can conveniently disassemble the anti-theft sleeve by further using a conventional tool (such as a flat screwdriver), the knife edge of the flat screwdriver is inserted into the force borrowing groove 9, the anti-theft sleeve 3 can be disassembled from the nut 2 by slightly applying force, and therefore the professional manager can be ensured to quickly disassemble a gas meter connector without damaging parts in a working state, the working efficiency is improved, and the working strength is reduced. It should be noted that, the premise that the gas meter connector can be disassembled by using a conventional tool rather than a professional tool is that the nut 2 and the anti-theft cover 3 are separated by using a disassembling structure (disassembling ring 14) matched with the meter connector, so that the risk of being disassembled and stolen is avoided.

Example two

The structure of the second embodiment is basically the same as that of the first embodiment, and the difference is that:

as shown in fig. 5, the utility model relates to an anti-theft gas meter connects on the connector body 1 has set up pressure measurement subassembly, pressure measurement subassembly including form in on the connector body 1 outer wall and with the pressure-measuring pipe 20 that the connector body 1 is linked together, be provided with a valve inside 21 in the pressure-measuring pipe 20 a nut 22 has been closed on the outer end of pressure-measuring pipe 20, be provided with packing ring 23 between valve inside 21 and the nut 22, the outer end of valve inside 21 is provided with a valve needle. Because be had pressure in the gas pipeline, and prior art pipeline can not test its pressure, through setting up pressure measurement subassembly to the realization tests the atmospheric pressure size in the gas pipeline, in addition through setting up a valve needle (not shown in the figure), can make valve needle plug tight or send out through nut 22 is rotatory, thereby realize aerifing or discharging the gas in the gas pipeline.

The above-mentioned embodiments only represent the preferred embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, various changes, modifications and substitutions can be made without departing from the spirit of the invention, and these are all within the scope of the invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides an theftproof gas table connects, includes the joint body (1) that links to each other with the pipe fitting and with screw cap (2) of table utensil threaded connection, the joint body (1) is worn to establish in screw cap (2), the outside of screw cap (2) is provided with theftproof cover (3) of being made by non-magnetic material, be provided with centre bore (12) that run through theftproof cover (3) on the theftproof cover (3), its characterized in that: an annular groove (4) is arranged on the outer wall of the screw cap (2), a mounting hole (5) is arranged on the annular groove (4) along the radial direction of the screw cap (2), a first magnet (7) and an elastic piece (6) used for pushing the first magnet (7) outwards towards the mounting hole (5) are arranged in the mounting hole (5), one end of the elastic piece (6) is propped against the bottom of the mounting hole (5), the other end of the elastic piece (6) is pressed against one end of the first magnet (7), a seating hole (8) for clamping the first magnet (7) is formed in the inner wall of the anti-theft sleeve (3), the anti-theft sleeve (3) is provided with a force-borrowing groove (9) which is convenient for managers to disassemble the anti-theft sleeve (3), the anti-theft gas meter connector further comprises a dismounting structure used for separating the screw cap (2) from the anti-theft sleeve (3).

2. The anti-theft gas meter connector according to claim 1, characterized in that: borrow power groove (9) including axial groove (10) and radial groove (11) that communicate each other, axial groove (10) and radial groove (11) mutually perpendicular, radial groove (11) with centre bore (12) intercommunication, the lowest tip department in radial groove (11) is provided with "V" type incision (13) that communicate with radial groove (11).

3. The anti-theft gas meter connector according to claim 1, characterized in that: the disassembly structure comprises a disassembly ring (14) sleeved outside the anti-theft sleeve (3), a disassembly hole (15) corresponding to the mounting hole (5) in a matched mode is formed in the disassembly ring (14), a second magnet (16) is arranged in the disassembly hole (15), and the magnetic pole of the first magnet (7) and the magnetic pole of the second magnet (16) are opposite in homopolar mode.

4. The anti-theft gas meter connector according to claim 3, characterized in that: the first magnet (7) and the second magnet (16) are in clearance fit in the mounting hole (5) and the dismounting hole (15) respectively.

5. The anti-theft gas meter connector according to claim 1, characterized in that: when the annular groove (4) is positioned outside the lower end face of the anti-theft sleeve (3), a fixing pad (17) which is used for preventing the anti-theft sleeve (3) from being directly clamped with the nut (2) before assembly and is made of plastics is sleeved in the annular groove (4).

6. The anti-theft gas meter connector according to claim 1, characterized in that: the joint body (1) and one end connected with the nut (2) are provided with a blocking edge (18), and the joint body (1) is abutted to the nut (2) through the blocking edge (18) after penetrating the nut (2).

7. The anti-theft gas meter connector according to claim 6, characterized in that: and a sealing ring (19) is arranged at the blocking edge (18) of the joint body (1).

8. The anti-theft gas meter connector according to claim 1, characterized in that: be formed with external screw thread (24) on the periphery wall of nut (2), be formed with on the inner wall of theftproof cover (3) with external screw thread (24) assorted internal thread (25) on nut (2).

9. The anti-theft gas meter connector according to claim 1, characterized in that: the elastic piece (6) is a spring or an elastic metal sheet.

10. The anti-theft gas meter connector according to claim 1, characterized in that: still be provided with a pressure measurement subassembly on the joint body (1), pressure measurement subassembly including form in on the joint body (1) outer wall and with pressure-measuring pipe (20) that the joint body (1) is linked together, be provided with a valve core (21) in pressure-measuring pipe (20) a nut (22) has been closed on the outer end of pressure-measuring pipe (20), be provided with between valve core (21) and nut (22) packing ring (23), the outer end of valve core (21) is provided with a valve needle.