CN111520524A - Gas utensil twin coil solenoid valve and thermocouple connection structure that anticreep nature is good - Google Patents

Abstract

The invention relates to a gas appliance double-coil electromagnetic valve and thermocouple connecting structure with good anti-falling performance. The solenoid valve connecting part comprises a connecting support, a contact pin assembly and a base. The thermocouple connecting part comprises a connecting plastic cap and a core wire terminal component. The ground terminal is composed of a conductive sleeve and a wire pressing elastic sheet. The temperature sensing head element and the temperature sensing shell of the thermocouple assembly are respectively and electrically connected with the pin assembly and the wire pressing elastic piece. The conductive sleeve is sleeved on the connecting support. The connecting plastic cap is provided with a clamping arm, and correspondingly, the base is provided with an annular limiting groove. 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 batch 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 that anticreep nature is good

Technical Field

The invention relates to the technical field of gas appliance manufacturing, in particular to a gas appliance double-coil electromagnetic valve and thermocouple connecting structure with good anti-falling performance.

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 gas appliance double-coil electromagnetic valve and thermocouple connection structure, and the direct electric conduction between the electromagnetic valve connection part and the thermocouple assembly is realized by adding a ground terminal so as to form a current loop between the electromagnetic valve connection part and the thermocouple assembly, thereby ensuring that the thermocouple assembly has good grounding property, effectively solving the problems and reducing the difficulty and cost of cooker 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.

Disclosure of Invention

The invention aims to solve the technical problem of providing a gas appliance double-coil electromagnetic valve and thermocouple connecting structure which has simple structural design, good conductivity, simple and convenient assembly, good insertion reliability and good anti-disengagement performance and ensures good insertion reliability between a thermocouple connecting part and an electromagnetic valve connecting part.

In order to solve the technical problem, the invention relates to a gas appliance double-coil electromagnetic valve and thermocouple connecting structure with good anti-falling performance. 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 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 connecting 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 piece. The conductive sleeve and the connecting support are coaxially sleeved to realize the grounding function of the temperature sensing shell. The connecting plastic cap is also provided with a clamping arm. The number of the clamping arms is at least 2, and the clamping arms are formed by continuously downwards extending the lower end face of the connecting plastic cap. The free end of each clamping arm extends inwards to form a clamping protrusion, and correspondingly, an annular limiting groove matched with the clamping protrusion is formed around the outer side wall of the base. Around the solenoid valve support offer with the dodge notch of above-mentioned joint arm appearance looks adaptation, and its quantity, position are unanimous with the joint arm.

As a further improvement of the technical scheme of the invention, the side wall of the conductive sleeve is provided with an installation notch.

As a further improvement of the technical scheme of the invention, the ground terminal is clamped between the thermocouple connecting plastic cap and the connecting bracket, is arranged in the inner cavity of the connecting bracket and is sleeved on the connecting plastic cap.

As a further improvement of the technical scheme of the invention, the peripheral side wall of the thermocouple connecting plastic cap is provided with an annular limiting groove for being sleeved with the conductive sleeve, and a limiting flange is additionally formed at the lower end part of the annular limiting groove. The conductive sleeve is sleeved in the annular limiting groove and integrally inserted into the inner cavity of the connecting support. The clamping arm is formed by downward extension of a limiting flange.

As a further improvement of the technical scheme of the invention, the thermocouple connecting plastic cap is provided with a first strip-shaped seam. The number of the first strip-shaped slits is set to be a plurality of, and the first strip-shaped slits are uniformly distributed around the peripheral side wall of the thermocouple connection plastic cap in the circumferential direction. The retention flange is penetrated by a first longitudinal slit to form a plurality of retention flange segments. The clamping arm is formed by continuously extending the limiting flange sections downwards.

As a further improvement of the technical scheme of the invention, the clamping protrusion is provided with a guide inclined plane which is formed by inwards beveling the lower end surface of the clamping arm.

As a further improvement of the technical scheme of the invention, 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 lines.

As a further improvement of the technical scheme of the invention, a second strip-shaped seam is arranged on the conductive sleeve. The number of the second strip-shaped slits is set to be a plurality of, and the second strip-shaped slits are uniformly distributed around the peripheral side wall of the conductive sleeve in the circumferential direction.

As a further improvement of the technical scheme of the invention, a guide bulge extends outwards from the peripheral side wall of the thermocouple connecting plastic cap, and correspondingly, a strip-shaped guide notch matched with the guide bulge is arranged on the side wall of the connecting support. And the guide bulge is matched with the installation notch and passes through the installation notch.

As a further improvement of the technical scheme of the invention, the two sides of the insertion end of the guide bulge are provided with the guide-in inclined planes.

Compared with the connecting structure of the double-coil electromagnetic valve and the thermocouple of the gas appliance in the traditional design, in the technical scheme disclosed by the invention, the contact pin assembly is communicated with the core wire terminal assembly, and the ground wire terminal is communicated with the connecting bracket, so that the main/auxiliary current and the ground wire of the thermocouple and the electromagnetic valve are completely connected. On the premise of ensuring reliable grounding of the thermocouple assembly and convenience in installation of the cooker, after the electromagnetic valve connecting part and the thermocouple connecting part are inserted and combined, the clamping protrusion is positively hooked in the annular limiting groove, so that the phenomenon that the electromagnetic valve connecting part is separated from the thermocouple connecting part under the action of external force is avoided, and the reliability and the stability of connection of the electromagnetic valve connecting part and the thermocouple connecting part are ensured; 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 the 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 a connection structure of a dual-coil solenoid valve and a thermocouple of a gas appliance having good separation prevention performance according to the present invention.

Fig. 3 is a schematic view of an assembly of a solenoid valve connection part, a thermocouple connection part, and a ground terminal in the gas appliance dual-coil solenoid valve and thermocouple connection structure according to the present invention, which has excellent separation prevention.

Fig. 4 is an exploded view of an assembly of a solenoid valve connection part, a thermocouple connection part, and a ground terminal in a gas appliance dual-coil solenoid valve and thermocouple connection structure according to the present invention, which has excellent separation prevention.

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

Fig. 9 is a cross-sectional view C-C of fig. 8.

Fig. 10 is an enlarged view of part I of fig. 9.

Fig. 11 is a schematic perspective view of a connection bracket in a connection structure of a dual-coil solenoid valve and a thermocouple of a gas appliance having a good separation prevention property according to the present invention.

Fig. 12 is a perspective view of the plug assembly of the gas appliance double-coil solenoid valve and thermocouple connection structure of the present invention having good separation prevention.

Fig. 13 is a schematic perspective view of a base in a connection structure of a dual-coil solenoid valve and a thermocouple of a gas appliance having a good separation prevention property according to the present invention.

Fig. 14 is a perspective view of a plastic cap connected to the gas appliance double-coil solenoid valve and thermocouple connection structure according to the present invention.

Fig. 15 is a schematic perspective view of another view angle of the plastic cap connected in the connection structure of the dual-coil electromagnetic valve and the thermocouple of the gas appliance with good anti-slip property according to the present invention.

Fig. 16 is a perspective view illustrating a thermocouple assembly in a gas appliance dual coil solenoid valve and thermocouple connection structure according to the present invention, which has excellent separation prevention.

Fig. 17 is a perspective view of a ground terminal in the gas appliance double-coil solenoid valve and thermocouple connection structure according to the present invention, which has excellent separation prevention performance.

Fig. 18 is a perspective view of another view of the ground terminal in the gas appliance dual coil solenoid valve and thermocouple connection structure according to the present invention, which has excellent separation prevention.

1-a solenoid valve connection; 11-connecting the stent; 111-avoiding the notch; 112-strip guide notch; 12-a pin assembly; 13-a base; 131-an annular limiting groove; 2-thermocouple connection; 21-connecting a plastic cap; 211-snap arms; 2111-Snap-fit projection; 21111-guide ramp; 212-annular limit groove; 213-a position-defining flange; 2131-limiting flange segment; 214-first stripe slit; 215-guide projection; 2151-introduction of slant; 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-second stripe slit; 412-installation gap; 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 those shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

Fig. 2 is a schematic structural diagram of a gas appliance double-coil solenoid valve and thermocouple connection structure with good anti-slip performance, which is disclosed by the invention, and the gas appliance double-coil solenoid valve and thermocouple connection structure mainly comprises a solenoid valve connection part 1, a thermocouple connection part 2, a thermocouple assembly 3, a ground terminal 4 and the like, wherein the solenoid valve connection part 1 is arranged right below the thermocouple connection part 2 and is connected with the thermocouple connection part in an inserting manner.

Fig. 3 and 4 respectively show schematic diagrams of an assembly of a solenoid valve connection portion, a thermocouple connection portion, and a ground terminal in a gas appliance dual-coil solenoid valve and thermocouple connection structure with good anti-slip performance according to the present invention, and an exploded view thereof, in which the solenoid valve connection portion 1 includes a connection bracket 11, a pin assembly 12, and a base 13. The pin assembly 12 is built in 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 connection plastic cap 21 and a core terminal assembly 22 fitted to the pin assembly 12. The core terminal assembly 22 is inserted and fixed in the inner cavity of the 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 to the pin assembly 12 and the wire pressing elastic piece 42, respectively. The conductive sleeve 41 is coaxially sleeved with the connecting bracket 11 to realize the grounding function of the temperature sensing housing 32. The connecting plastic cap 21 is further provided with a clamping arm 211. The number of the clamping arms 211 is at least 2, and the clamping arms are formed by continuously downwards extending the lower end face of the connecting plastic cap 21. The free end of each clamping arm 211 extends inwards to form a clamping protrusion 2111, and correspondingly, an annular limiting groove 131 matched with the clamping protrusion 2111 is formed around the outer side wall of the base 13. An escape notch 111 matched with the shape of the clamping arm 211 is formed around the solenoid valve bracket 11, and the number and the orientation of the escape notches are consistent with those of the clamping arm 211 (as shown in fig. 5 to 18).

The working principle of the gas appliance double-coil electromagnetic valve and thermocouple connection structure with good anti-falling performance 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 2 are inserted and combined, the clamping protrusion 2111 is positively hooked in the annular limiting groove 131, 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 2 are further ensured, the ground 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 further 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 gas appliance dual-coil solenoid valve and thermocouple connection structure with good anti-slip performance, a mounting notch 412 may be formed in the side wall of the conductive sleeve 41 and may penetrate in the height direction (as shown in fig. 17 and 18). Thus, when the ground terminal 4 is sleeved on the plastic cap 21, the installation notch 412 allows the conductive sleeve 41 to be adaptively expanded along the circumferential direction, so as to effectively reduce the installation difficulty of the ground terminal 4 and improve the installation efficiency.

Furthermore, the ground terminal 4 is preferably clamped between the plastic coupling cap 21 and the connecting bracket 11, is disposed in the inner cavity of the connecting bracket 11, and is sleeved on the plastic coupling 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 coupling cap 21 and prevent the ground terminal from "play" 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 coupling cap 21 for being sleeved into the conductive sleeve 41, and additionally a limiting flange 213 (as shown in fig. 14 and 15) is formed at the lower end thereof. The conductive sleeve 31 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). The snap arm 211 is formed by extending down the stopper flange 213.

Furthermore, a first strip-shaped seam 214 can be arranged on the plastic coupling cap 21. The number of the first strip-shaped seams 214 is set to be a plurality of, and the first strip-shaped seams are evenly distributed around the peripheral side wall of the plastic coupling cap 21. The position-defining flange 213 is penetrated by the first slit 214 to form a plurality of position-defining flange segments 2131. The snap arm 211 is formed by the stop flange segment 2131 continuing downward (as shown in fig. 14 and 15). Through adopting above-mentioned technical scheme to set up to increased the elasticity of joint arm 211 self effectively, ensured that it radially has sufficient but oscillating volume along the couple connection moulds cap 21, thereby more be favorable to realizing with spacing recess 131 of annular adaptation, joint.

Certainly, as a further optimization of the above technical solution, the clamping protrusion 2111 may be further provided with a guide inclined surface 21111 formed by inwardly chamfering the lower end surface of the clamping arm 211 (as shown in fig. 14 and 15), so that the clamping protrusion 2111 enters the annular limiting groove 131 more smoothly, and has a certain automatic guiding function, thereby reducing the difficulty in assembling the electromagnetic valve connection portion 1 and the thermocouple connection portion 2. Generally, the angle of inclination of the lead-in chamfer 21111 may be controlled to 45 to 60 °.

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. 17 and 18). Thus, when the conductive sleeve 41 is clamped in the gap between the plastic coupling 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 occurrence of poor contact is avoided.

In practice, the ground terminal 4 is first sleeved on the plastic connecting cap 21 and then inserted into the inner cavity of the connecting bracket 11. 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 second strip-shaped slit 411 may be further formed on the conductive sleeve 41. The second strip-shaped slits 411 are provided in a plurality and are circumferentially distributed around the peripheral side wall of the conductive sleeve 41 (as shown in fig. 17 and 18).

In order to ensure the operation of "fool-proof" during assembly, a guiding protrusion 215 may extend outward from the peripheral sidewall of the plastic coupling cap 21, and correspondingly, a strip-shaped guiding notch 112 (as shown in fig. 3, 7, 11, and 14) adapted to the guiding protrusion 215 is formed on the sidewall of the connecting bracket 11. In the actual assembly process, the relative positional relationship of the guide protrusions 215 with respect to the strip-like guide notches 112 can be rotationally adjusted, so that the positioning accuracy of the connection bracket 11 with respect to the connection plastic cap 21 and the pin assembly 12 with respect to the core terminal assembly 22 can be effectively ensured.

Certainly, as a further optimization of the above technical solution, the two sides of the insertion end of the guide protrusion 215 may also be provided with the guide inclined planes 2151 (as shown in fig. 14), so that the guide protrusion 215 enters the strip-shaped guide notch 112 more smoothly, and has a certain automatic guiding function, thereby reducing the assembly difficulty. Generally, the angle of inclination of lead-in ramp 2151 is controlled to be 30-45 °.

Finally, in view of reducing the manufacturing cost of the ground terminal 4 and ensuring the molding quality, the conductive sleeve 41 and the pressing spring piece 42 thereof are preferably molded by integral punching and bending (as shown in fig. 17 and 18).

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 (10)

1. The gas appliance double-coil electromagnetic valve and thermocouple connecting structure with good anti-falling performance 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 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 connecting 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; the connecting plastic cap is also provided with a clamping arm; the number of the clamping arms is at least 2, and the clamping arms are formed by continuously extending the lower end surface of the connecting plastic cap downwards; a clamping protrusion extends inwards from the free end of the clamping arm, and correspondingly, an annular limiting groove matched with the clamping protrusion is formed around the outer side wall of the base; the electromagnetic valve support is surrounded with an avoidance notch matched with the shape of the clamping arm, and the number and the direction of the avoidance notch are consistent with those of the clamping arm.

2. The gas appliance double-coil electromagnetic valve and thermocouple connection structure with good anti-drop performance according to claim 1, wherein a mounting notch is formed in a side wall of the conductive sleeve.

3. The gas appliance double-coil electromagnetic valve and thermocouple connection structure with good anti-slip performance according to claim 2, wherein the ground terminal is clamped between the plastic thermocouple connection cap and the connection bracket, is arranged in the inner cavity of the connection bracket, and is sleeved on the plastic connection cap.

4. The gas appliance double-coil electromagnetic valve and thermocouple connection structure with good anti-slip performance according to claim 3, wherein an annular limiting groove is formed around a peripheral side wall of the thermocouple connection plastic cap for being sleeved with the conductive sleeve, and a limiting flange is additionally formed at a lower end portion thereof; the conductive sleeve is sleeved in the annular limiting groove and is integrally inserted into the inner cavity of the connecting bracket; the clamping arm is formed by downward extension of the limiting flange.

5. The gas appliance double-coil electromagnetic valve and thermocouple connection structure with good anti-drop performance according to claim 4, wherein a first strip-shaped seam is formed on the thermocouple connection plastic cap; the number of the first strip-shaped seams is set to be a plurality, and the first strip-shaped seams are uniformly distributed around the peripheral side wall of the plastic cap for galvanic couple connection in the circumferential direction; the position-defining flange is penetrated by the first strip-shaped slit to form a plurality of position-defining flange segments; the clamping arm is formed by continuously extending the limiting flange sections downwards.

6. The gas appliance double-coil solenoid valve and thermocouple connection structure with good separation prevention according to claim 1, wherein a guide slope is provided on the snap-fit projection, and is formed by inward beveling of a lower end surface of the snap-fit arm.

7. The gas appliance double-coil electromagnetic valve and thermocouple connection structure with good anti-drop performance according to any one of claims 1 to 6, 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.

8. The gas appliance double-coil electromagnetic valve and thermocouple connection structure with good anti-drop performance according to claim 7, wherein a second slotted seam is formed on the conductive sleeve; the number of the second strip-shaped slits is set to be a plurality of, and the second strip-shaped slits are uniformly distributed around the peripheral side wall of the conductive sleeve in the circumferential direction.

9. The good gas appliance double-coil electromagnetic valve and thermocouple connection structure of separation prevention according to any one of claims 2 to 5, wherein a guide protrusion extends outwards from a peripheral side wall of the plastic cap for thermocouple connection, and correspondingly, a strip-shaped guide notch matched with the guide protrusion is formed on a side wall of the connection bracket; the guide bulge is matched with the installation notch and penetrates through the installation notch.

10. The gas appliance double-coil solenoid valve and thermocouple connection structure with good separation prevention according to claim 9, wherein a guide inclined surface is provided on both sides of the insertion end of the guide protrusion.

Images