Waterproof connecting structure of electromagnetic valve and thermocouple

Abstract

The utility model discloses a waterproof connecting structure of an electromagnetic valve and a thermocouple, which comprises an electromagnetic valve connecting support and a thermocouple connecting assembly, and the thermocouple connecting assembly comprises a connecting plastic cap and a sealing rubber part. A connecting plastic cap in the thermocouple connecting assembly is provided with a hollow inner cavity, a sealing rubber piece is provided with a conical sealing part, the hollow inner cavity of the connecting plastic cap is provided with a conical matching face, the conical sealing part of the sealing rubber piece is tightly attached to the conical matching face of the connecting plastic cap, and the connecting plastic cap is connected to an electromagnetic valve connecting support in a clamped mode. A signal line of the thermocouple penetrates through the sealing plastic part and is connected with the electromagnetic valve through a signal line terminal located in the connecting plastic cap. According to the utility model, excellent sealing and waterproof effects can be achieved, water vapor can be prevented from entering the joint of the signal line terminal of the thermocouple and the signal line single needle of the electromagnetic valve to corrode the signal line terminal, the problem of poor contact caused by increased contact resistance is avoided, and normal use of a kitchen range is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of a flameout protection device for a cooker, in particular to a waterproof connection structure between a solenoid valve and a thermocouple. Background Art

[0002] At present, the mainstream gas flameout protection devices for cookers on the market mainly consist of a solenoid valve and a thermocouple. The thermocouple mainly consists of a head, a connecting wire, and a connecting mechanism at the tail end. The head is made of special materials and can generate electromotive force in the flame. The solenoid valve mainly consists of a copper shaft, a base, a coil, an electromagnet, an electromagnetic sheet, a bracket, a signal wire pin, a spring, and a gasket. When an electric current is passed through the coil sleeved on the electromagnet, a magnetic field will be generated, sucking the electromagnetic sheet and then linking to the gasket on the copper shaft to achieve the purpose of opening the valve. After the current disappears, the gasket returns to its original position under the action of the spring to achieve the purpose of closing the valve. After the thermocouple is connected to the solenoid valve, an electric current is generated in the head of the thermocouple in the flame to supply power to the solenoid valve to open the valve and open the gas path. After an accidental flameout, the current disappears, the solenoid valve closes the valve, and the gas path is closed.

[0003] The existing connection structures between the solenoid valve and the thermocouple do not have a waterproof function. Once water vapor enters the connection between the signal wire single pin of the solenoid valve and the signal wire terminal of the thermocouple, it will corrode the signal wire terminal, increase the contact resistance, cause poor contact, and result in the inability to open the valve, making the cooker unusable. This problem not only appears in household cookers but is more prominent in commercial cookers with relatively poor usage environments. Summary of the Utility Model

[0004] To solve the above technical problems, the purpose of the utility model is to provide a waterproof connection structure between a solenoid valve and a thermocouple, which can achieve an excellent sealing and waterproof effect, avoid water vapor entering the connection between the signal wire terminal of the thermocouple and the signal wire single pin of the solenoid valve to corrode the signal wire terminal, and avoid the problem of increased contact resistance and poor contact, ensuring the normal use of the cooker.

[0005] To achieve the above technical purpose and reach the above technical effect, the utility model is realized through the following technical solutions:

[0006] A waterproof connection structure between a solenoid valve and a thermocouple includes a solenoid valve connection bracket and a thermocouple connection component. The thermocouple connection component includes a connecting plastic cap and a sealing rubber part;

[0007] The connecting plastic cap in the thermocouple connecting component has a hollow inner cavity. The sealing rubber part has a conical sealing part. The hollow inner cavity of the connecting plastic cap has a conical mating surface. The conical sealing part of the sealing rubber part is in close contact with the conical mating surface of the connecting plastic cap. The connecting plastic cap is snap-fitted on the solenoid valve connecting bracket. The signal wire of the thermocouple passes through the sealing rubber part and is connected to the solenoid valve through the signal wire terminal located in the connecting plastic cap.

[0008] Further, a hook is provided at the end of the connecting plastic cap. The solenoid valve connecting bracket has an inner hole with a snap-fitting surface. The connecting plastic cap is inserted into the inner hole of the solenoid valve connecting bracket, and the hook on the connecting plastic cap is snap-fitted on the snap-fitting surface of the inner hole of the solenoid valve connecting bracket.

[0009] Further, an annular groove is provided at the part of the connecting plastic cap below the hook. A sealing ring is assembled in the annular groove. The sealing ring is in sealing cooperation with the inner hole wall of the solenoid valve connecting bracket to improve the sealing performance between the thermocouple connecting component and the solenoid valve connecting bracket.

[0010] Further, the outer diameter of the conical sealing part of the sealing rubber part gradually increases in the direction away from the solenoid valve connecting bracket.

[0011] The conical sealing part of the sealing rubber part of the present utility model is closely pressed against the conical mating surface of the connecting plastic cap, which can effectively prevent external water vapor from entering the interior and achieve a good waterproof effect.

[0012] Further, the thermocouple connecting component further includes a sealing plug. The sealing plug is snap-fitted on the tail end of the connecting plastic cap, and the inner end of the sealing plug presses against the sealing rubber part.

[0013] Furthermore, the sealing plug includes a plug part and a snap part. The plug part is snap-fitted on the tail end of the connecting plastic cap. A clamping platform is provided on the periphery of the tail end of the connecting plastic cap, and the snap part of the sealing plug is snap-fitted on the clamping platform of the connecting plastic cap.

[0014] Further, a wire passing hole for the signal wire of the thermocouple to penetrate is provided at the center of the sealing rubber part, and the diameter of the wire passing hole is smaller than the outer diameter of the signal wire of the thermocouple to form compression on the signal wire and improve the sealing effect.

[0015] Further, the middle part of the periphery of the connecting plastic cap is a concave structure, which is convenient for holding by hand to insert and pull out the thermocouple connecting component.

[0016] Further, the solenoid valve connecting bracket is connected to the solenoid valve base.

[0017] Further, the solenoid valve has a single signal wire needle extending into the solenoid valve connection bracket, and the signal wire terminal connected to the signal wire of the thermocouple is connected to the single signal wire needle extending into the solenoid valve connection bracket.

[0018] The beneficial effects of the present utility model are as follows:

[0019] The present utility model realizes the connection between the solenoid valve and the thermocouple through the cooperation of the thermocouple connection assembly and the solenoid valve connection bracket; in the thermocouple connection assembly, the connecting plastic cap is snap-fitted on the solenoid valve connection bracket, and the sealing rubber part is hermetically connected to the hollow inner cavity of the connecting plastic cap through the tight fit of the conical sealing part and the conical mating surface. The signal wire of the thermocouple passes through the sealing rubber part and is connected to the solenoid valve through the signal wire terminal located in the hollow inner cavity of the connecting plastic cap. Compared with the existing connection structure, the connection structure of the present utility model can achieve a better sealing and waterproof effect, avoid water vapor entering the connection between the signal wire terminal of the thermocouple and the single signal wire of the solenoid valve to corrode the signal wire terminal, and avoid the problem of increased contact resistance and poor contact, ensuring the normal use of the stove equipped with the flameout protection device. Description of the Drawings

[0020] Figure 1 It is a schematic diagram of the waterproof connection structure between the solenoid valve and the thermocouple according to the embodiment of the present utility model.

[0021] Figure 2 It is a schematic diagram of the structure of the thermocouple connection assembly in the waterproof connection structure between the solenoid valve and the thermocouple according to the embodiment of the present utility model.

[0022] Figure 3 It is a schematic diagram of the structure of the solenoid valve connection bracket in the waterproof connection structure between the solenoid valve and the thermocouple according to the embodiment of the present utility model.

[0023] Figure 4 It is a schematic diagram of the structure of the connecting plastic cap in the waterproof connection structure between the solenoid valve and the thermocouple according to the embodiment of the present utility model.

[0024] Figure 5 It is a schematic diagram of the structure of the sealing rubber part in the waterproof connection structure between the solenoid valve and the thermocouple according to the embodiment of the present utility model.

[0025] Figure 6 It is a schematic diagram of the structure of the sealing plug in the waterproof connection structure between the solenoid valve and the thermocouple according to the embodiment of the present utility model.

[0026] In the figure, 10: solenoid valve, 101: solenoid valve base, 102: single-pin signal wire; 20: thermocouple, 201: signal wire, 202: signal wire terminal; 30: solenoid valve connection bracket, 301: clamping surface; 40: thermocouple connection assembly, 401: connecting plastic cap, 4011: hook, 4012: annular groove, 4013: clamping platform, 4014: tapered mating surface, 402: sealing rubber part, 4021: tapered sealing part, 4022: cylindrical part, 403: sealing ring, 404: sealing plug, 4041: plug part, 4042: buckle part. Detailed implementation mode

[0027] The following elaborates on the preferred embodiments of the present utility model in conjunction with the accompanying drawings, so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present utility model.

[0028] As Figures 1 to 6 A preferred embodiment of a waterproof connection structure for a solenoid valve 10 and a thermocouple 20 of a cooking appliance flameout protection device as shown, which includes a solenoid valve connection bracket 30 and a thermocouple connection assembly 40. The thermocouple connection assembly 40 includes a connecting plastic cap 401 and a sealing rubber part 402; the solenoid valve connection bracket 30 is connected to the solenoid valve base 101.

[0029] The connecting plastic cap 401 in the thermocouple connection assembly 40 has a hollow inner cavity. The sealing rubber part 402 has a tapered sealing part 4021. The tail of the hollow inner cavity of the connecting plastic cap 401 has a tapered mating surface 4014. The tapered sealing part 4021 of the sealing rubber part 402 is in close contact with the tapered mating surface 4014 of the connecting plastic cap 401 to achieve a sealed connection between the sealing rubber part 402 and the connecting plastic cap 401. The head of the connecting plastic cap 401 is clamped on the solenoid valve connection bracket 30. The signal wire 201 of the thermocouple 20 passes through the sealing rubber part 402 and is connected to the solenoid valve 10 through the signal wire terminal 202 located in the hollow inner cavity of the connecting plastic cap 401.

[0030] Specifically, in this embodiment, the connecting plastic cap 401 is made by plastic injection molding process, and the solenoid valve connection bracket 30 is made by one-piece stretching and stamping process. Four hooks 4011 are provided at the head end of the connecting plastic cap 401. The solenoid valve connection bracket 30 has an open inner hole, and this inner hole has a clamping surface 301. The connecting plastic cap 401 is inserted into the inner hole of the solenoid valve connection bracket 30, and the hooks 4011 on the connecting plastic cap 401 are clamped on the clamping surface 301 of the inner hole of the solenoid valve connection bracket 30 to achieve an anti-disconnection effect.

[0031] The connecting plastic cap 401 is provided with an annular groove 4012 at a portion below the hook 4011, and a sealing ring 403 is installed in the annular groove 4012. The sealing ring 403 is sealed with the smooth straight surface of the lower part of the inner hole wall of the solenoid valve connecting bracket 30 to improve the sealing between the thermocouple connecting assembly 40 and the solenoid valve connecting bracket 30.

[0032] In this embodiment, the thermocouple connection assembly 40 further includes a sealing plug 404 , which is clamped on the tail end of the connection plastic cap 401 , and the inner end of the sealing plug 404 is pressed against the sealing rubber member 402 .

[0033] In this embodiment, the sealing plug 404 includes a plugging portion 4041 and a snap-on portion 4042. The plugging portion 4041 is snap-connected to the tail end of the connecting plastic cap 401. A clamping platform 4013 is provided on the periphery of the tail end of the connecting plastic cap 401. The snap-on portion 4042 with a clamping head of the sealing plug 404 is snap-connected to the clamping platform 4013 of the connecting plastic cap 401.

[0034] The sealing plug 404 is made by plastic injection molding process, and has a through hole at its center; a wire hole is provided at the center of the sealing rubber member 402; the signal wire 201 of the thermocouple 20 passes through the through hole of the sealing plug 404 and the wire hole of the sealing rubber member 402 in sequence. The diameter of the wire hole of the sealing rubber member 402 is smaller than the outer diameter of the signal wire 201 of the thermocouple 20, so as to form pressure on the signal wire 201 and improve the sealing effect.

[0035] The sealing rubber member 402 also has a cylindrical portion 4022 connected to the conical sealing portion 4021. The hollow inner cavity of the connecting plastic cap 401 is substantially cylindrical except for the conical mating surface 4014. The outer diameter of the cylindrical portion 4022 of the sealing rubber member 402 is smaller than the diameter of the cylindrical surface of the hollow inner cavity of the connecting plastic cap 401. The plugging portion 4041 of the sealing plug 404 is pressed against the cylindrical portion 4022 of the sealing rubber member 402.

[0036] In the present invention, the outer diameter of the conical sealing portion 4021 of the sealing rubber member 402 gradually increases in the direction away from the electromagnetic valve connection bracket 30 (toward the direction of the connecting plastic cap tail end). The sealing plug 404 presses the sealing rubber member 402 against the conical mating surface of the connecting plastic cap 401. The sealing rubber member is pressed tightly into the hollow inner cavity of the connecting plastic cap through the conical surface contact, which can achieve a better sealing effect, prevent external water vapor from entering the interior, and achieve a better waterproof effect.

[0037] In this embodiment, the middle portion of the outer periphery of the connecting plastic cap 401 is a concave structure, which can be conveniently held to insert and remove the thermocouple connecting assembly 40 .

[0038] The solenoid valve 10 has a signal wire single pin 102 extending into the inner hole of the solenoid valve connection bracket 30. The signal wire terminal 202 connected to the signal wire 201 of the thermocouple 20 is connected to the signal wire single pin 102 extending into the solenoid valve connection bracket 30, so as to realize the signal connection between the solenoid valve 10 and the thermocouple 20.

[0039] Compared with the existing connection structure, the connection structure of the present utility model can achieve a better sealing and waterproof effect, can prevent water vapor from entering the connection between the signal wire terminal of the thermocouple and the signal wire single pin of the solenoid valve to corrode the wiring terminal, and avoid the problem of poor contact caused by an increase in contact resistance, ensuring the normal use of the stove.

[0040] The above are only the embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied to other related technical fields, shall be similarly included in the patent protection scope of the present utility model.

Claims

1. A waterproof connection structure between a solenoid valve and a thermocouple, characterized in that: It includes a solenoid valve connection bracket and a thermocouple connection assembly, wherein the thermocouple connection assembly includes a connection plastic cap and a sealing rubber part; The connecting plastic cap in the thermocouple connecting assembly has a hollow inner cavity, the sealing rubber part has a conical sealing portion, the hollow inner cavity of the connecting plastic cap has a conical mating surface, the conical sealing portion of the sealing rubber part is tightly attached to the conical mating surface of the connecting plastic cap, the connecting plastic cap is clamped on the solenoid valve connecting bracket, and the signal line of the thermocouple passes through the sealing rubber part and is connected to the solenoid valve through the signal line terminal located in the connecting plastic cap.

2. The waterproof connection structure of a solenoid valve and a thermocouple according to claim 1, characterized in that: A hook is provided on the end of the connecting plastic cap, the solenoid valve connecting bracket has an inner hole, the inner hole has a clamping surface, the connecting plastic cap is inserted into the inner hole of the solenoid valve connecting bracket, and the hook on the connecting plastic cap is clamped on the clamping surface of the inner hole of the solenoid valve connecting bracket.

3. A waterproof connection structure between a solenoid valve and a thermocouple according to claim 2, characterized in that: An annular groove is provided on the portion of the connecting plastic cap located below the hook, a sealing ring is installed in the annular groove, and the sealing ring is sealed and matched with the inner hole wall of the electromagnetic valve connecting bracket.

4. The waterproof connection structure of a solenoid valve and a thermocouple according to claim 1, characterized in that: The outer diameter of the conical sealing portion of the sealing rubber piece gradually increases in a direction away from the electromagnetic valve connecting bracket.

5. The waterproof connection structure of a solenoid valve and a thermocouple according to claim 1, characterized in that: The thermocouple connection assembly also includes a sealing plug, which is clamped on the tail end of the connecting plastic cap, and the inner end of the sealing plug is pressed against the sealing rubber member.

6. A waterproof connection structure between a solenoid valve and a thermocouple according to claim 5, characterized in that: The sealing plug includes a plugging portion and a buckle portion, the plugging portion is buckled on the tail end of the connecting plastic cap, a clamping platform is provided on the periphery of the tail end of the connecting plastic cap, and the buckle portion of the sealing plug is clamped on the clamping platform of the connecting plastic cap.

7. A waterproof connection structure between a solenoid valve and a thermocouple according to claim 1, characterized in that: A wire hole for the signal wire of the thermocouple to pass through is provided at the center of the sealing rubber component, and the diameter of the wire hole is smaller than the outer diameter of the signal wire of the thermocouple.

8. The waterproof connection structure of a solenoid valve and a thermocouple according to claim 1, characterized in that: The middle part of the periphery of the connecting plastic cap is a concave structure.

9. The waterproof connection structure of a solenoid valve and a thermocouple according to claim 1, characterized in that: The solenoid valve has a single signal line pin extending into the solenoid valve connection bracket, and a signal line terminal connected to the signal line of the thermocouple is connected to the single signal line pin extending into the solenoid valve connection bracket.

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