CN212928941U - Gas utensil twin coil solenoid valve and thermocouple connection structure with anticreep function - Google Patents

Abstract

The utility model relates to a gas utensil twin coil solenoid valve and thermocouple connection structure with anticreep function, including solenoid valve connecting portion, thermocouple subassembly and ground terminal. The electromagnetic valve connecting part is provided with a connecting bracket. The thermocouple connecting part is provided with a thermocouple connecting plastic cap. The ground terminal is clamped between the connecting support and the thermocouple connecting plastic cap. The peripheral side wall of the thermocouple connection plastic cap extends outwards continuously to form a guide bulge. The side wall of the connecting bracket is provided with a strip-shaped guide notch. The guide projection continues to extend downwardly to form a snap-in cantilever. The side wall of the connecting bracket is provided with a clamping gap. On one hand, on the premise of saving the process of installing the screws on the ground wire, the thermocouple assembly is ensured to have good grounding performance; on the other hand, the problem that a plurality of thermocouple wires are mutually wound when the thermocouple wires are assembled in batches is avoided; on the other hand, the phenomenon that the electromagnetic valve connecting part is disengaged relative to the thermocouple connecting part can be avoided.

Description

Gas utensil twin coil solenoid valve and thermocouple connection structure with anticreep function

Technical Field

The utility model relates to a gas utensil makes technical field, especially relates to gas utensil twin coil solenoid valve and thermocouple connection structure with anticreep function.

Background

The gas electromagnetic valve is a safe emergency cut-off device of a gas pipeline, can be connected with a gas leakage alarm system or connected with a fire-fighting and other intelligent alarm control terminal module and the like, realizes on-site or remote automatic/manual emergency cut-off of a gas source, and ensures gas safety. When accidental flameout or harmful strong vibration occurs, the electromagnetic valve can be automatically closed. The gas flame-out protection device flowing to the market mainly comprises a thermocouple connecting part, an electromagnetic valve connecting part and a thermocouple assembly. The solenoid valve connecting part comprises a connecting bracket and a pin inserting assembly. The thermocouple assembly can generate millivolt thermoelectric force in flame, meanwhile, the electromagnetic valve connecting part arranged in the valve seat is connected and conducted with the thermocouple connecting part, and the electromagnetic valve is kept in an attraction state under the action of the thermoelectric force, so that the fuel gas is in a connection state. As is known, the thermocouple assembly includes a temperature sensing head element and a temperature sensing housing, wherein the temperature sensing head element is required to be electrically connected to a pin assembly in the connection portion of the solenoid valve, and the temperature sensing housing is required to be electrically connected to the connection bracket, so as to form a current loop.

In the prior art, usually, a lead is welded on the outer side wall of the temperature sensing housing, and a circular terminal arranged at the tail end of the lead is fixed on a valve seat by means of a screw (as shown in fig. 1), and meanwhile, when the whole plant is assembled in batches, a plurality of thermocouple wires can be wound, so that additional straightening is needed, the assembly difficulty is increased, in addition, when an operator actually executes the gas appliance installation operation, a large amount of assembly man-hour and material consumption are paid, and the installation difficulty and cost are increased to a certain extent. In the future, the company develops a novel connecting structure of a gas appliance double-coil thermocouple and an electromagnetic valve, and the connecting structure is directly electrically conducted with a thermocouple assembly at the connecting part of the electromagnetic valve in a mode of additionally arranging a ground terminal so as to form a current loop between the electromagnetic valve and the thermocouple assembly, ensure that the thermocouple assembly has good grounding performance, effectively solve the problems and reduce the difficulty and cost of appliance installation. However, in actually performing the installation process of the gas appliance, the following problems occur: when the thermocouple connecting part is acted by external force, the thermocouple connecting part is easy to separate from the electromagnetic valve connecting part. Therefore, the phenomena of electric connection between the pin assembly and the temperature sensing head element and failure of electric conduction between the ground terminal and the electromagnetic valve connecting part can not be avoided, so that a current loop can not be formed, and the normal use of the gas appliance is influenced. Thus, a skilled person is urgently needed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a gas utensil twin coil solenoid valve and thermocouple connection structure with anticreep function, its structural design is simple, and the conductivity is good, and the assembly is simple and convenient, and ensures to have good the reliability of inserting between thermocouple connection portion and the solenoid valve connection portion and close.

In order to solve the technical problem, the utility model relates to a gas utensil twin coil solenoid valve and thermocouple connection structure with anticreep function, it includes solenoid valve connecting portion, thermocouple subassembly and ground terminal. The electromagnetic valve connecting part is arranged right below the thermocouple connecting part and is connected with the thermocouple connecting part in an inserting mode. Solenoid valve connecting portion include linking bridge, contact pin subassembly and base. The contact pin assembly is arranged in the base, and the inner cavity of the connecting support is integrally arranged. The pin assembly includes a main line pin and an auxiliary line pin. The thermocouple connecting part comprises a thermocouple connecting plastic cap and a core wire terminal assembly matched with the contact pin assembly. The core wire terminal assembly is inserted and fixed in the inner cavity of the thermocouple connection plastic cap and comprises a main wire terminal matched and inserted with the main wire contact pin and an auxiliary wire terminal matched and inserted with the auxiliary wire contact pin. The ground terminal is composed of a conductive sleeve and a wire pressing elastic sheet formed by extending the conductive sleeve. The thermocouple assembly comprises a temperature sensing head element and a temperature sensing shell sleeved on the periphery of the temperature sensing head element, wherein the temperature sensing head element and the temperature sensing shell are electrically connected with the pin assembly and the wire pressing elastic sheet by means of wires respectively. The conductive sleeve and the connecting support are coaxially sleeved to realize the grounding function of the temperature sensing shell. The peripheral side wall of the thermocouple connection plastic cap extends outwards to form a guide bulge, and correspondingly, the side wall of the connection support is provided with a strip-shaped guide notch matched with the guide bulge. The guide projection continues to extend downwards and surpasses the lower end face of the thermocouple connection plastic cap to form a clamping cantilever. The two side walls of the clamping cantilever extend outwards to form clamping bulges, and elastic deformation avoiding cutting seams are formed in the length direction of the clamping cantilever. A clamping gap is formed in the side wall of the connecting support and used for being matched with the clamping protrusion. The width of joint breach is greater than the width of strip direction breach, and it arranges under strip direction breach, and as an organic whole with this strip direction breach intercommunication.

As a further improvement of the technical scheme of the utility model, be provided with the direction inclined plane on the joint arch. The guide inclined plane is formed by obliquely cutting the outer side wall of the clamping protrusion towards the elastic deformation avoiding slot.

As a further improvement, the utility model provides an installation breach has been seted up on the lateral wall of conductive sleeve, and along the direction of height of conductive sleeve runs through. The guide bulge is matched with the installation notch and penetrates through the installation notch.

As a further improvement of the technical scheme of the utility model, the ground wire terminal is pressed from both sides and is located between thermocouple connection plastic cap and the linking bridge, its inner chamber of arranging the linking bridge in, and the cover is located on the thermocouple connection plastic cap.

As a further improvement of the technical proposal of the utility model, the peripheral side wall of the thermocouple connection plastic cap is provided with an annular limiting groove for being packed into the conductive sleeve. The conductive sleeve is sleeved in the annular limiting groove and integrally inserted into the inner cavity of the connecting support.

As a further improvement of the technical proposal of the utility model, the conductive sleeve is preferably in a waist drum shape structure, and the side wall of the conductive sleeve is formed by extending a plurality of arc lines according to the sequence of circumference.

As a further improvement of the technical proposal of the utility model, the conductive sleeve is provided with a strip-shaped seam. The number of the strip-shaped seams is set to be a plurality of, and the strip-shaped seams are evenly distributed around the peripheral side wall of the conductive sleeve in the circumferential direction.

Compared with a dual-coil electromagnetic valve and thermocouple connection structure of a gas appliance in the traditional design, in the technical scheme disclosed by the utility model, on the premise of ensuring reliable grounding of the thermocouple assembly and convenience in installation of the stove, after the electromagnetic valve connection part and the thermocouple connection part are inserted and combined, the clamping bulge is positively hooked in the clamping notch, so that the phenomenon that the electromagnetic valve connection part is separated from the thermocouple connection part due to external force is avoided, the reliability and stability of connection between the electromagnetic valve connection part and the thermocouple connection part are further ensured, and the ground wire terminal and the connection bracket are always kept in a contact state; on the premise of saving the process of installing the screws of the ground wire, the reliability of grounding of the thermocouple assembly is effectively ensured; in addition, the winding problem among a plurality of thermocouple wires when the whole machine factory is assembled in batches is avoided, so that the investment of assembly labor is greatly reduced, the installation efficiency is effectively improved, and the installation cost of the cooker is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, 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.

Fig. 1 is a schematic structural diagram of a connection structure of a dual-coil solenoid valve and a thermocouple of a gas appliance in the prior art.

Fig. 2 is a schematic structural view of the gas appliance double-coil solenoid valve and thermocouple connection structure with the anti-dropping function of the present invention.

Fig. 3 is an assembly schematic diagram of the solenoid valve connecting portion, the thermocouple connecting portion and the ground terminal in the gas appliance double-coil solenoid valve and thermocouple connecting structure with the anti-drop function of the present invention.

Fig. 4 is an assembly exploded view of the solenoid valve connecting portion, the thermocouple connecting portion and the ground terminal in the gas appliance double-coil solenoid valve and thermocouple connecting structure with the anti-drop function of the present invention.

Fig. 5 is a front view of fig. 3.

Fig. 6 is a sectional view a-a of fig. 5.

Fig. 7 is a sectional view B-B of fig. 5.

Fig. 8 is a schematic perspective view of a connection bracket in the connection structure of the gas appliance double-coil solenoid valve and the thermocouple with the anti-dropping function of the present invention.

Fig. 9 is a schematic perspective view of the plug assembly in the structure for connecting the dual coil solenoid valve and the thermocouple of the gas appliance with the anti-dropping function of the present invention.

Fig. 10 is a schematic perspective view of a base in a connection structure of a gas appliance double-coil solenoid valve and a thermocouple with an anti-dropping function according to the present invention.

Fig. 11 is a schematic perspective view of the thermocouple connection plastic cap in the structure of the gas appliance with anti-drop function and the dual-coil solenoid valve and thermocouple connection of the present invention.

Fig. 12 is an enlarged view of part I of fig. 11.

Fig. 13 is a schematic perspective view of the thermocouple assembly in the gas appliance double-coil solenoid valve and thermocouple connection structure with the anti-drop function of the present invention.

Fig. 14 is a perspective view of a view angle of a ground terminal in the gas appliance double-coil solenoid valve and thermocouple connection structure with anti-dropping function of the present invention.

Fig. 15 is a schematic perspective view of another view angle of the ground terminal in the structure of the gas appliance with anti-drop function, which is composed of a dual-coil solenoid valve and a thermocouple.

1-a solenoid valve connection; 11-connecting the stent; 111-strip guide notches; 112-clamping gap; 12-a pin assembly; 13-a base; 2-thermocouple connection; 21-thermocouple connection plastic cap; 211-guide projections; 2111-clamping the cantilever; 21111-snap projection; 211111-guide ramp; 21112-elastic deformation avoiding cutting; 212-annular limit groove; 22-a core terminal assembly; 3-a thermocouple assembly; 31-a temperature sensitive head element; 32-a temperature sensing housing; 4-a ground terminal; 41-a conductive sleeve; 411-a mounting notch; 412-a bar seam; 42-pressing line spring.

Detailed Description

In the description of the present invention, it is to be understood that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience of description of the present invention and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

The contents of the present invention will be further described in detail with reference to the specific embodiments, and fig. 2 shows a schematic structural diagram of a dual-coil solenoid valve and a thermocouple connection structure of a gas appliance with an anti-drop function according to the present invention, and it can be understood that the dual-coil solenoid valve and the thermocouple connection structure mainly include a solenoid valve connection portion 1, a thermocouple connection portion 2, a thermocouple assembly 3, a ground terminal 4, and so on. The electromagnetic valve connecting part 1 is arranged right below the thermocouple connecting part 2 and is connected with each other in an inserting manner.

Fig. 3 and 4 respectively show the assembly schematic diagram of the solenoid valve connecting portion, the thermocouple connecting portion and the ground terminal in the gas appliance double-coil solenoid valve and thermocouple connection structure with the anti-drop function and the explosion diagram thereof, and it can be known that the solenoid valve connecting portion 1 includes the connecting bracket 11, the contact pin component 12 and the base 13. The pin assembly 12 is built into the base 13 and is integrally inserted into the inner cavity of the connecting bracket 11. The pin assembly 12 includes a main line pin and a sub line pin. The thermocouple junction 2 includes a thermocouple junction plastic cap 21 and a core terminal assembly 22 that mates with the pin 12 assembly described above. The core terminal assembly 22 is inserted and fixed in the inner cavity of the thermocouple connection plastic cap 21, and includes a main wire terminal adapted to and inserted into the main wire pin and an auxiliary wire terminal adapted to and inserted into the auxiliary wire pin. The ground terminal 4 is composed of a conductive sleeve 41 and a wire pressing elastic piece 42 formed by extending the conductive sleeve 41. The thermocouple assembly 3 includes a temperature sensing head element 31 and a temperature sensing shell 32 sleeved on the periphery of the temperature sensing head element 31, wherein the temperature sensing head element 31 and the temperature sensing shell 32 are electrically connected with the pin assembly 12 and the wire pressing spring piece 32 by means of wires respectively. The conductive sleeve 41 is coaxially sleeved with the connecting bracket 11 to realize the grounding function of the temperature sensing housing 32. A guide protrusion 211 extends outwards from the peripheral side wall of the thermocouple connection plastic cap 21, and correspondingly, a strip-shaped guide notch 111 matched with the guide protrusion 211 is formed on the side wall of the connection bracket 11. The guide boss 211 continues to extend downward beyond the lower end surface of the thermocouple connection plastic cap 21 to form a snap-fit cantilever 2111. Clamping protrusions 21111 extend outwards from both side walls of the clamping cantilever 2111, and elastic deformation avoiding slots 21112 are formed along the length direction of the clamping cantilever. A clamping notch 112 is formed on the side wall of the connecting bracket 11 for fitting the clamping protrusion 21111. And the width of the clamping notch 112 is greater than that of the strip-shaped guide notch 111, and the clamping notch is arranged right below the strip-shaped guide notch 111 and is communicated with the strip-shaped guide notch 111 into a whole (as shown in fig. 5 to 15).

The working principle of the gas appliance double-coil electromagnetic valve and thermocouple connecting structure with the anti-drop function is as follows: two conductors (namely the temperature sensing head element 31 and the temperature sensing shell 32) with different components are connected into a loop, in the normal combustion process of the stove, the temperature sensing head element 31 has temperature difference relative to the temperature sensing shell 32, so that thermoelectrical potential is generated, meanwhile, the electromagnetic valve connecting part 1 arranged in the valve seat is connected and conducted with the thermocouple connecting part 2, the thermocouple component 3 is kept in a grounding state, and the electromagnetic valve is kept in an attraction state under the action of the thermoelectrical potential, so that the continuous supply of fuel gas is ensured. When accidental flameout occurs, the temperatures of the temperature sensing head element 31 and the temperature sensing shell 32 tend to be the same, the thermocouple assembly 3 cannot generate thermoelectric force, the electromagnetic valve is in a separation state, and then the fuel gas is switched to a closed state.

Through adopting above-mentioned technical scheme to set up can produce following beneficial effect: 1) pin assembly 12 is in electrical communication with core terminal assembly 22, thereby providing electrical communication between thermocouple assembly 3 and the solenoid valve; and the ground terminal 4 is connected with the connection bracket 11 to form a reliable grounding of the ground terminal 4. The existence of the ground terminal 4 can effectively realize the purpose of forming a current loop between the electromagnetic valve connecting part 1 and the thermocouple assembly 3, so that the thermocouple assembly 3 has good grounding performance; 2) the process of connecting the round terminal at the tail end of the wire to the valve body by the aid of the screw is omitted, consumption of the screw and an installation process of the screw are avoided, investment of assembly labor is greatly reduced, installation efficiency of the cooker is effectively improved, and installation cost is reduced; 3) after the electromagnetic valve connecting part 1 and the thermocouple connecting part are inserted and combined, the clamping protrusion is positively hooked in the clamping notch, so that the phenomenon that the electromagnetic valve connecting part 1 is separated from the thermocouple connecting part 2 under the action of external force is avoided, the reliability and the stability of connection of the electromagnetic valve connecting part 1 and the thermocouple connecting part are ensured, the ground wire terminal 4 and the connecting support 11 are always kept in a contact state, and the reliability of grounding of the thermocouple assembly 3 is ensured; 4) the problem of winding among a plurality of thermocouple wires when the whole factory is assembled in batches is avoided, so that the investment of assembly labor is greatly reduced, the installation efficiency is effectively improved, and the installation cost of the cooker is reduced.

As a further optimization of the above-described gas appliance dual coil solenoid valve and thermocouple connection structure having the anti-drop function, a guide slope 211111 may be further provided on the catching protrusion 21111. The guide slope 211111 is formed by cutting the outer side wall of the clamping protrusion 21111 towards the elastic deformation avoiding slit slope 21112 (as shown in fig. 11 and 12), so that the clamping protrusion 21111 enters the clamping notch 112 more smoothly, a certain automatic guide function is achieved, and the assembly difficulty of the solenoid valve connection part 1 and the thermocouple connection part 2 is reduced. Generally, the angle of inclination of the lead-in chamfer 211111 may be controlled to be 45-60 °.

Further, a mounting notch 411 may be formed in a side wall of the conductive sleeve 41 and may penetrate in a height direction thereof (as shown in fig. 14 and 15). Thus, when the operation of sleeving the ground terminal 4 on the thermocouple connection plastic cap 21 is performed, the installation notch 411 allows the conductive sleeve 41 to be adaptively expanded along the circumferential direction of the conductive sleeve, so that the installation difficulty of the ground terminal 4 is effectively reduced, and the installation efficiency of the ground terminal is improved.

Furthermore, the ground terminal 4 is preferably clamped between the plastic cap 21 and the connecting bracket 11, is disposed in the inner cavity of the connecting bracket 11, and is sleeved on the plastic cap 21 (as shown in fig. 3, 4, 5, 6, and 7). Thus, the adhesion between the conductive sleeve 41 of the ground terminal 4 and the connecting bracket 11 is effectively ensured, the stability and reliability of the electrical conduction between the two are ensured, and the reliability of the grounding of the thermocouple assembly 3 is ensured.

In order to ensure the position certainty and consistency of the ground terminal 4 relative to the plastic thermocouple connection cap 21 and prevent the ground terminal from generating a "play" phenomenon in the practical application process, as a further optimization of the above technical solution, an annular limiting groove 212 may be further formed around the peripheral side wall of the plastic thermocouple connection cap 21 to be used for accommodating the conductive sleeve 41 (as shown in fig. 11). The conductive sleeve 41 is sleeved in the annular limiting groove 212 and is integrally inserted into the inner cavity of the connecting bracket 11 (as shown in fig. 3, 4, 5, 6 and 7).

Of course, the conductive sleeve 41 may also be designed as a "waist drum" structure, and the sidewall thereof is formed by a plurality of arc lines sequentially extending circumferentially (as shown in fig. 14 and 15). Thus, when the conductive sleeve 41 is clamped in the gap between the thermocouple connection plastic cap 21 and the connecting bracket 11, the waist drum-shaped structure is in a stressed elastic deformation state, so that the conductive sleeve 41 is always elastically abutted against the inner side wall of the connecting bracket 11, the contact stability and reliability of the conductive sleeve 41 and the connecting bracket 11 are ensured, and the phenomenon of poor contact is avoided.

Finally, it is known that, in the actual implementation of the installation process, the ground terminal 4 is first sleeved on the thermocouple connection plastic cap 21 and then inserted into the inner cavity of the connection bracket 11 as a whole. However, due to the "waist drum" structure of the conductive sleeve 41, the insertion operation is very difficult to perform, and the conductive sleeve 41 is very easily damaged to cause permanent plastic deformation. In view of this, a strip-shaped slit 412 may be further formed on the conductive sleeve 41. The plurality of strip-shaped slits 412 are provided in number and are circumferentially distributed evenly around the peripheral side wall of the conductive sleeve 41 (as shown in fig. 14 and 15).

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (7)

1. The gas appliance double-coil electromagnetic valve and thermocouple connecting structure with the anti-drop function is characterized by comprising an electromagnetic valve connecting part, a thermocouple assembly and a ground terminal; the electromagnetic valve connecting part is arranged right below the thermocouple connecting part and is mutually inserted and connected; the electromagnetic valve connecting part comprises a connecting bracket, a contact pin assembly and a base; the contact pin assembly is arranged in the base and is integrally arranged in the inner cavity of the connecting bracket; the pin assembly comprises a main line pin and an auxiliary line pin; the thermocouple connecting part comprises a thermocouple connecting plastic cap and a core wire terminal assembly matched with the pin assembly; the core wire terminal assembly is inserted and fixed in the inner cavity of the thermocouple connection plastic cap and comprises a main wire terminal matched and inserted with the main wire contact pin and an auxiliary wire terminal matched and inserted with the auxiliary wire contact pin; the ground terminal is composed of a conductive sleeve and a wire pressing elastic sheet formed by extending the conductive sleeve; the thermocouple assembly comprises a temperature sensing head element and a temperature sensing shell sleeved on the periphery of the temperature sensing head element, wherein the temperature sensing head element and the temperature sensing shell are respectively and electrically connected with the pin assembly and the wire pressing elastic sheet; the conductive sleeve and the connecting support are coaxially sleeved to realize the grounding function of the temperature sensing shell; a guide bulge continuously extends outwards from the peripheral side wall of the thermocouple connection plastic cap, and correspondingly, a strip-shaped guide notch matched with the guide bulge is formed in the side wall of the connection support; the guide bulge continues to extend downwards and exceeds the lower end face of the thermocouple connection plastic cap to form a clamping cantilever; clamping bulges extend outwards from two side walls of the clamping cantilever, and elastic deformation avoiding cutting seams are arranged along the length direction of the clamping cantilever; a clamping notch is formed in the side wall of the connecting bracket and used for being matched with the clamping protrusion; the width of joint breach is greater than the width of strip direction breach, it arrange in under the strip direction breach, and with strip direction breach intercommunication is as an organic whole.

2. The gas appliance double-coil electromagnetic valve and thermocouple connection structure with the drop-off prevention function as claimed in claim 1, wherein a guide inclined plane is provided on the clamping protrusion; the guide inclined plane is formed by beveling the outer side wall of the clamping protrusion towards the elastic deformation avoiding slot.

3. The gas appliance double-coil electromagnetic valve and thermocouple connection structure with the drop-off prevention function according to claim 1, wherein a mounting notch is formed in a side wall of the conductive sleeve and penetrates through the conductive sleeve in a height direction; the guide bulge is matched with the installation notch and penetrates through the installation notch.

4. The gas appliance dual-coil solenoid valve and thermocouple connection structure having a disconnection preventing function according to any one of claims 1 to 3, wherein the ground terminal is clamped between the thermocouple connection plastic cap and the connection bracket, is disposed in the inner cavity of the connection bracket, and is sleeved on the thermocouple connection plastic cap.

5. The gas appliance double-coil electromagnetic valve and thermocouple connection structure with the drop-off prevention function as claimed in claim 4, wherein an annular limiting groove is formed around the peripheral side wall of the thermocouple connection plastic cap for being sleeved into the conductive sleeve; the conductive sleeve is sleeved in the annular limiting groove and is integrally inserted into the inner cavity of the connecting support.

6. The gas appliance double-coil electromagnetic valve and thermocouple connection structure with the drop-off prevention function as claimed in claim 5, wherein the conductive sleeve is of a waist drum-shaped structure, and the side wall of the conductive sleeve is formed by sequentially and circumferentially extending a plurality of arc-shaped lines.

7. The gas appliance double-coil electromagnetic valve and thermocouple connection structure with the drop-off prevention function as claimed in claim 6, wherein a strip-shaped slit is formed on the conductive sleeve; the number of the strip-shaped seams is set to be a plurality of, and the strip-shaped seams surround the peripheral side wall of the conductive sleeve and are circumferentially and uniformly distributed.

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