Threaded elastic connection structure of electromagnetic valve and thermocouple

Abstract

The utility model discloses a thread type elastic connecting structure of an electromagnetic valve and a thermocouple, which comprises an electromagnetic valve support and a connecting nut, a sleeve is sleeved outside a signal line of the thermocouple, the connecting nut is sleeved outside the sleeve, and the signal line of the thermocouple penetrates through the sleeve; the connecting nut is in threaded connection with the electromagnetic valve bracket; a signal line of the thermocouple is connected with a signal line contact II of the electromagnetic valve through a signal line contact I at the end part of the thermocouple; a spring sleeved outside the sleeve is arranged between the connecting nut and the first signal line contact. The spring pushes the first signal line contact to abut against the second signal line contact through the elastic effect. The cost of the electromagnetic valve base can be greatly reduced, good elastic connection between the electromagnetic valve signal line contact and the thermocouple signal line contact can be achieved, and the problem of poor contact of the contacts caused by vibration or thermal expansion and cold contraction and the like is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas flameout protection devices, in particular to a threaded elastic connection structure of a solenoid valve and a thermocouple. Background Art

[0002] The solenoid valve in the thermoelectric gas flameout protection device can cut off the gas source in time after the stove is accidentally extinguished. At present, the mainstream gas flameout protection device for stoves on the market is mainly composed of a solenoid valve and a thermocouple. The thermocouple is mainly composed 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 is mainly composed of a copper shaft, a base, a coil, an electromagnet, an electromagnetic sheet, a bracket, a signal line needle, a spring, and a sealing gasket. When the coil on the electromagnet is passed through a current, a magnetic field will be generated, which will attract the electromagnetic sheet and then link it to the sealing gasket on the copper shaft to achieve the purpose of opening and maintaining the gas passage; after the current disappears, the sealing gasket returns to its position under the action of the spring to achieve the purpose of closing the gas passage. After the thermocouple is connected to the solenoid valve, the thermocouple head generates current in the flame, which supplies the solenoid valve to open the valve and open the gas path; after the accidental flameout, the current disappears, the solenoid valve closes the valve and closes the gas path.

[0003] There is a type of flameout protection device used in high temperature environments (such as commercial stoves, ovens, and baking ovens). Since this type of flameout protection device is used in a relatively high temperature environment, the connection structure between the thermocouple and the solenoid valve generally avoids the use of plastic parts that are easily softened and fail at high temperatures, so a metal threaded connection method is often used. At present, the mainstream threaded connection method on the market is to tap the copper base of the solenoid valve, and at the same time, a nut is set at the thermocouple end. When the two are locked, the center signal line contact is pressed to connect the solenoid valve and the thermocouple. On the one hand, this method requires a large total length of copper base due to the need for tapping, and more materials are used, and additional machining and tapping are required, which is costly; on the other hand, after the thread is locked, the two signal line contacts are rigidly in contact, the nut is not locked or loose (transportation vibration, etc.), or factors such as thermal expansion and contraction will cause the signal line contact to have poor contact, the contact resistance will increase, the flameout protection device will fail, and the stove cannot be used. Utility Model Content

[0004] In order to solve the above technical problems, the purpose of the utility model is to provide a threaded elastic connection structure between a solenoid valve and a thermocouple, which can greatly reduce the cost of the solenoid valve base, and can achieve a good elastic connection between the solenoid valve signal line contacts and the thermocouple signal line contacts, avoiding the problem of poor contact of the contacts caused by vibration or thermal expansion and contraction.

[0005] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:

[0006] A threaded elastic connection structure between a solenoid valve and a thermocouple, comprising a solenoid valve bracket and a connecting nut, wherein a sleeve is sleeved on the outside of the signal line of the thermocouple, the connecting nut is sleeved on the outside of the sleeve, and the signal line of the thermocouple passes through the sleeve; the connecting nut is threadedly connected to the solenoid valve bracket, and the signal line of the thermocouple is connected to a signal line contact 2 of the solenoid valve through a signal line contact 1 at its end; a spring sleeved on the outside of the sleeve is provided between the connecting nut and the signal line contact 1, and the spring pushes the signal line contact 1 close to the signal line contact 2 through elastic action.

[0007] Furthermore, the solenoid valve bracket has an inner hole, the tail of the inner hole is provided with an internal thread, the connecting nut is provided with an external thread, and the connecting nut and the solenoid valve bracket are locked and connected by the cooperation of the external thread and the internal thread.

[0008] Furthermore, the front end of the signal wire of the thermocouple is stripped of the insulation layer and then welded to the signal wire contact 1, the signal wire of the solenoid valve is connected to the signal wire contact 2, and the signal wire contact 1 and the signal wire contact 2 are matched in a concave-convex manner.

[0009] Furthermore, the head end of the sleeve is folded outwards by 90° to form a folded edge.

[0010] Furthermore, the tail of the sleeve is welded to the ground wire.

[0011] Furthermore, an insulating gasket is provided between the head end of the sleeve and the first signal line contact.

[0012] Furthermore, a cavity is opened at the front of the connecting nut, and the spring is arranged in the cavity of the connecting nut.

[0013] Furthermore, a metal gasket is provided at the head end of the sleeve, and the spring presses the metal gasket against the folded edge of the sleeve.

[0014] Furthermore, the tail end of the connecting nut has a boss, and after the connecting nut is connected to the solenoid valve bracket, the end of the solenoid valve bracket is closely against the boss of the connecting nut.

[0015] Furthermore, the base of the solenoid valve is connected to the solenoid valve bracket by interference riveting.

[0016] The beneficial effects of the utility model are:

[0017] The connection structure between the thermocouple and the solenoid valve in the utility model is realized by a threaded connection between a connecting nut and a solenoid valve bracket, rather than a threaded connection structure between a connecting nut and a solenoid valve base in the prior art; compared with opening an internal thread on a copper base, the utility model opens an internal thread on a solenoid valve bracket made of relatively cheap materials, which can greatly reduce production costs.

[0018] Furthermore, the utility model arranges a spring between the connecting nut and the signal line contact 1, and the spring pushes the signal line contact 1 of the thermocouple close to the signal line contact 2 of the solenoid valve. Under the action of the elastic force, the signal line contact 1 and the signal line contact 2 maintain good elastic contact, which can avoid the problem of poor contact of the contacts caused by vibration or thermal expansion and contraction, thereby ensuring the effective use of the flameout protection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of the thermocouple portion of the threaded elastic connection structure between the solenoid valve and the thermocouple in Example 1 of the utility model.

[0020] Figure 2 It is a structural schematic diagram of the solenoid valve part in the threaded elastic connection structure between the solenoid valve and the thermocouple in Example 1 of the utility model.

[0021] Figure 3 This is a schematic diagram of the assembly structure of the threaded elastic connection structure between the solenoid valve and the thermocouple in Example 1 of the utility model.

[0022] Figure 4 It is a structural schematic diagram of the solenoid valve bracket in the threaded elastic connection structure between the solenoid valve and the thermocouple in Example 1 of the utility model.

[0023] Figure 5 This is a structural schematic diagram of a signal line contact 1 in a threaded elastic connection structure between an electromagnetic valve and a thermocouple in Example 1 of the utility model.

[0024] Figure 6 It is a structural schematic diagram of the sleeve in the threaded elastic connection structure between the solenoid valve and the thermocouple in Example 1 of the utility model.

[0025] Figure 7 It is a structural schematic diagram of a connecting nut in a threaded elastic connection structure between a solenoid valve and a thermocouple in Example 1 of the utility model.

[0026] Figure 8 This is a schematic diagram of the assembly structure of the threaded elastic connection structure between the solenoid valve and the thermocouple in Example 2 of the utility model.

[0027] In the figure, 1: solenoid valve bracket; 2: connecting nut, 21: cavity, 22: boss; 3: thermocouple, 31: ground wire; 4: signal line contact one; 5: signal line contact two; 6: sleeve, 61: folded edge; 7: spring; 8: insulating gasket; 9: metal gasket; 10: base. DETAILED DESCRIPTION

[0028] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention 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 invention.

[0029] Example 1

[0030] like Figures 1 to 7 A threaded elastic connection structure of a solenoid valve and a thermocouple is shown, which includes a solenoid valve bracket 1 and a connecting nut 2, the signal line of the thermocouple 3 is externally sheathed with a sleeve 6, the sleeve 6 is externally sheathed with the connecting nut 2, and the signal line of the thermocouple 3 passes through the sleeve 6; the connecting nut 2 is threadedly connected to the solenoid valve bracket 1, and the signal line of the thermocouple 3 is connected to the signal line contact 2 5 of the solenoid valve through the signal line contact 1 4 at its end; a spring 7 sheathed outside the sleeve 6 is provided between the connecting nut 2 and the signal line contact 1 4; specifically, a cavity 21 is opened at the front of the connecting nut 2, and the spring 7 is arranged in the cavity 21 of the connecting nut 2; the spring 7 pushes the signal line contact 1 4 close to the signal line contact 2 5 through elastic action; in this embodiment 1, the spring 7 is a round spring.

[0031] Specifically, Figure 4 As shown, the solenoid valve bracket 1 is made by a stretching one-piece molding process, and has an inner hole, and the tail of the inner hole is formed with an internal thread; the outer wall of the connecting nut 2 is formed with an external thread, and the connecting nut 2 and the solenoid valve bracket 1 are locked and connected by the matching of the external thread and the internal thread.

[0032] The front end of the signal wire of the thermocouple 3 is stripped of the insulation layer and welded to the signal wire contact 1 4, and the signal wire of the solenoid valve is connected to the signal wire contact 2 5; the front end of the signal wire contact 1 4 is a conical convex structure, and the tail end of the signal wire contact 2 5 is a conical concave structure, and the signal wire contact 1 4 and the signal wire contact 2 5 are matched by concave and convex. The concave and convex matching design is conducive to more effective contact. The signal wire contact 1 4 and the signal wire contact 2 5 are both made of brass and tinned on the surface. Figure 5 As shown, the centers of the signal line contact 1 4 and the signal line contact 2 5 are both provided with through holes for the signal line to pass through.

[0033] like Figure 6 As shown, the sleeve 6 is a copper tube, the head end of which is folded outward by 90° to form a folded edge 61, and the tail end is welded to the ground wire 31 to achieve grounding connection.

[0034] An insulating gasket 8 is provided between the head end of the sleeve 6 and the signal line contact 4. The insulating gasket 8 is a glass fiber resin laminate, which has high temperature resistant insulation properties and insulates the central electrical signal from the peripheral ground.

[0035] A metal gasket 9 is also provided at the head end of the sleeve 6, and the spring 7 presses the metal gasket 9 against the folded edge 61 of the sleeve 6; the design of the metal gasket 9 can increase the contact area of ​​the spring, making the grounding more stable.

[0036] The spring 7 is wound with stainless steel wire of larger diameter and has greater elastic force. One end of the spring presses the metal gasket 9, and the other end penetrates into and supports the connecting nut 2. In this embodiment, the direction of rotation is left-handed, which can effectively prevent metal chips from being scraped out when the connecting nut is tightened, causing short circuits and other problems.

[0037] like Figure 7 As shown, the tail end of the connecting nut 2 also has a boss 22 . After the connecting nut 2 is connected to the solenoid valve bracket 1 , the end of the solenoid valve bracket 1 is closely against the boss 22 of the connecting nut 2 .

[0038] Example 2

[0039] like Figure 8 As shown, the difference from Example 1 is that the spring in Example 2 is a flat spring, and no metal gasket is required to be provided at the head end of the sleeve 6; the end of the spring is directly pressed against the folded edge 61 of the sleeve 6.

[0040] When the utility model is in use, the base 10 of the solenoid valve is connected to the solenoid valve bracket 1 by interference riveting. The signal line contact 2 5 is located in the cavity of the base 10 of the solenoid valve, and the rear part of the solenoid valve bracket 1 extends outward; the connecting nut 2 is screwed into the rear part of the solenoid valve bracket 1 extending outward; after being screwed in, the tail end of the solenoid valve bracket 1 is closely against the boss 22 at the tail end of the connecting nut 2, and the signal line contact 1 4 and the signal line contact 2 5 are matched in concave and convex manner to realize the signal line connection between the solenoid valve and the thermocouple; the spring 7 can push the signal line contact 1 4 close to the signal line contact 2 5 through elastic action, so that the two contacts maintain good elastic contact, which can avoid the problem of poor contact of the contacts caused by vibration or thermal expansion and contraction, and ensure the effective use of the flameout protection device.

[0041] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A threaded elastic connection structure between a solenoid valve and a thermocouple, characterized in that: It includes an electromagnetic valve bracket and a connecting nut, the signal line of the thermocouple is sheathed on the outside with a sleeve, the connecting nut is sheathed on the outside of the sleeve, and the signal line of the thermocouple passes through the sleeve; the connecting nut is connected to the electromagnetic valve bracket by threads, and the signal line of the thermocouple is connected to the signal line contact 2 of the electromagnetic valve through the signal line contact 1 at its end; a spring sheathed on the outside of the sleeve is provided between the connecting nut and the signal line contact 1, and the spring pushes the signal line contact 1 close to the signal line contact 2 through elastic action.

2. The threaded elastic connection structure between a solenoid valve and a thermocouple according to claim 1, characterized in that: The solenoid valve bracket has an inner hole, the tail of the inner hole is provided with an internal thread, the connecting nut is provided with an external thread, and the connecting nut and the solenoid valve bracket are locked and connected through the matching of the external thread and the internal thread.

3. The threaded elastic connection structure between a solenoid valve and a thermocouple according to claim 1, characterized in that: The front end of the signal wire of the thermocouple is stripped of the insulation layer and welded to the signal wire contact 1, the signal wire of the solenoid valve is connected to the signal wire contact 2, and the signal wire contact 1 and the signal wire contact 2 are matched in a concave-convex manner.

4. The threaded elastic connection structure between a solenoid valve and a thermocouple according to claim 1, characterized in that: The head end of the sleeve is folded outwards by 90° to form a folded edge.

5. The threaded elastic connection structure between a solenoid valve and a thermocouple according to claim 1, characterized in that: The tail of the sleeve is welded to the ground wire.

6. A threaded elastic connection structure between a solenoid valve and a thermocouple according to claim 1 or 4, characterized in that: An insulating gasket is provided between the head end of the sleeve and the first signal line contact.

7. The threaded elastic connection structure between a solenoid valve and a thermocouple according to claim 1, characterized in that: A cavity is opened at the front of the connecting nut, and the spring is arranged in the cavity of the connecting nut.

8. The threaded elastic connection structure between a solenoid valve and a thermocouple according to claim 4, characterized in that: A metal gasket is arranged at the head end of the sleeve, and the spring presses the metal gasket against the folded edge of the sleeve.

9. The threaded elastic connection structure between a solenoid valve and a thermocouple according to claim 1, characterized in that: The tail end of the connecting nut is provided with a boss. After the connecting nut is connected to the solenoid valve bracket, the end of the solenoid valve bracket is closely against the boss of the connecting nut.

10. The threaded elastic connection structure between a solenoid valve and a thermocouple according to claim 1, characterized in that: The base of the solenoid valve is connected to the solenoid valve bracket by interference riveting.

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