Gas flameout protection device

Abstract

The utility model discloses a gas flameout protection device, which comprises a thermocouple, an electromagnetic valve and a guide sleeve, the thermocouple is provided with a phase conductor and a grounding conductor, the electromagnetic valve is provided with a support frame and a pin, the support frame is provided with a mounting hole, the guide sleeve is provided with a main line terminal and a grounding terminal, and the grounding terminal is connected with the grounding conductor and the support frame. The main line terminal is connected with the phase conductor and the pin. The guide sleeve comprises a guide sleeve body and a limiting piece, the limiting piece is arranged on the guide sleeve body, the guide sleeve body extends into the mounting hole, a second gap exists between the limiting piece and the guide sleeve body, the limiting piece is elastic, and the limiting piece generates elastic deformation through the second gap and is separated from or limited at the position of the supporting frame, so that the guide sleeve and the supporting frame are detachably connected. According to the utility model, the elastic deformation variation range of the limiting piece can be enlarged, the manufacturing precision requirement of the limiting piece is reduced, and the complexity of insulator processing technology can be reduced, thereby reducing the production cost.

Description

Technical Field

[0001] This utility model belongs to the field of gas appliance technology, specifically relating to a gas flameout protection device. Background Technology

[0002] Existing technology uses connectors to electrically connect thermocouples to gas safety valves (especially solenoid valves), ensuring that when there is no flame in the burner, the thermocouples associated with the burner will cool down, and the solenoid valve will therefore no longer be energized, thus closing the passage of gas into the burner.

[0003] Currently, the connection structure between the solenoid valve and thermocouple in gas flameout protection devices on the market is complex. The solenoid valve is fixed to a bracket with a hook; the thermocouple is fixed to a connector with a retaining ring that engages with the hook. While this hook and ring connection structure ensures a stable and reliable connection, the hooks and rings are difficult to disassemble, making it difficult to separate the solenoid valve from the thermocouple. Furthermore, in the stove assembly process, the solenoid valve and thermocouple are not assembled in one piece; they need to be disassembled and connected to other related parts before being reassembled. Therefore, the existing connection structure is difficult to disassemble, easily damaging the thermocouple during disassembly, and inconvenient for stove repair.

[0004] To address the technical problem of difficult disassembly of the connecting structure, Chinese Patent No. CN209054589U (authorization announcement number: CN209054589U) was published on October 30, 2018. This utility model simplifies the structure, making the thermocouple and solenoid valve easy to disassemble and reliably connected, thus improving the assembly efficiency of the thermocouple and solenoid valve. When a positioning ring is used to connect to the positioning groove, the diameter of the positioning ring is larger than the diameter of the movable hole. The positioning ring contacts the wall of the movable hole, causing elastic deformation, which facilitates the insertion and removal of the thermocouple. The positioning ring achieves its locking in the positioning groove through its own elastic deformation. The range of elastic deformation of the positioning ring is relatively small. If the size of the positioning ring is designed to be too large, it will not be able to pass into the movable hole; if the size of the positioning ring is designed to be too small, it will easily fall off the positioning groove. Therefore, the positioning ring requires higher dimensional precision in its manufacturing. Utility Model Content

[0005] The purpose of this utility model is to solve the aforementioned technical problems existing in the prior art and provide a gas flameout protection device. This device allows the limiting component to undergo elastic deformation through gap two, increasing the range of elastic deformation of the limiting component, reducing the manufacturing precision requirements of the limiting component, and simplifying the guide sleeve processing, thereby reducing production costs. Simultaneously, it increases the contact area between the limiting component and the support frame, making the connection between them more robust. Furthermore, it allows the limiting component to quickly detach from or be positioned on the support frame, enabling rapid disassembly and assembly of thermocouples and solenoid valves with reliable connections, reducing assembly time at the OEM, improving installation efficiency, and increasing production efficiency.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A gas flameout protection device includes a thermocouple, a solenoid valve, and a guide sleeve. The thermocouple has a phase conductor and a grounding conductor. The solenoid valve has a support frame and a pin. The support frame has a mounting hole. The guide sleeve has a main terminal and a grounding terminal. The grounding terminal connects to the grounding conductor and the support frame. The main terminal connects to the phase conductor and the pin. The guide sleeve includes a guide sleeve body and a limiting member. The limiting member is disposed on the guide sleeve body, which extends into the mounting hole. A gap exists between the limiting member and the guide sleeve body. The limiting member is elastic and undergoes elastic deformation through the gap, disengaging from or being limited at the support frame, allowing the guide sleeve and the support frame to be detachably connected.

[0008] Furthermore, the limiting member is provided with a limiting protrusion, and a limiting groove is formed between the limiting protrusion and the limiting member. The support frame is provided with a support part, the limiting protrusion is supported on the support part, and the support part is located in the limiting groove.

[0009] Furthermore, the guide sleeve body is provided with a protrusion, and the limiting component is fixed on the protrusion.

[0010] Furthermore, the guide sleeve body has two cavities and an opening, which is connected to the cavity, allowing the cavity to be connected vertically. The main line terminal and the grounding terminal are respectively located in the corresponding cavity.

[0011] Furthermore, the guide sleeve is provided with a limiting part, which is located in the cavity, and the main line terminal and the grounding terminal are limited on the corresponding limiting part.

[0012] Furthermore, the grounding terminal is provided with a guide part, the guide sleeve is provided with a guide groove, the guide part is located in the guide groove, and moves up and down along the guide groove.

[0013] Furthermore, the guide sleeve body is provided with a locking part, and the locking part and the guide sleeve body are provided with a slot. The support frame is inserted into the slot, so that the locking part is limited to the outside of the support frame.

[0014] Furthermore, the guide sleeve body is provided with a protrusion, which is closely attached to the inner side of the mounting hole.

[0015] Furthermore, the opening is provided with a guide hole, which is correspondingly provided with the pin, and the diameter of the guide hole gradually increases from bottom to top.

[0016] Furthermore, the guide sleeve body is provided with a guide block, and the guide block and the limiting member are correspondingly set, with the guide block set along the height direction of the guide sleeve body.

[0017] This utility model, by adopting the above-mentioned technical solution, has the following beneficial effects:

[0018] This invention features an elastic limiting member on the guide sleeve body, with a gap between the limiting member and the guide sleeve body. One end of the limiting member is fixed to the guide sleeve body, while the other end detaches. When the guide sleeve body is inserted into the mounting hole, the limiting member acts on the inner wall of the mounting hole, generating elastic deformation through the gap. This increases the range of elastic deformation of the limiting member, reduces the precision requirements for its manufacturing, and decreases the complexity of the guide sleeve processing, thereby lowering production costs. Simultaneously, it increases the contact area between the limiting member and the support frame, resulting in a more secure connection. Furthermore, it allows the limiting member to quickly detach from or be positioned on the support frame, enabling rapid and reliable assembly and disassembly of thermocouples and solenoid valves, reducing assembly time at the OEM, improving installation efficiency, and increasing overall production efficiency. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings:

[0020] Figure 1 This is a schematic diagram of the structure of a gas flameout protection device according to the present invention;

[0021] Figure 2 This is a schematic diagram of the connection between the solenoid valve, support frame, and guide sleeve in this utility model;

[0022] Figure 3 This is a schematic diagram of the guide sleeve in this utility model;

[0023] Figure 4 for Figure 3 A schematic diagram of the structure in direction A;

[0024] Figure 5 for Figure 4 Sectional view of BB;

[0025] Figure 6 This is a schematic diagram of the connection between the support frame and the guide sleeve in this utility model;

[0026] Figure 7 for Figure 6 Sectional view of CC;

[0027] Figure 8 This is a schematic diagram of the structure in which the main line terminal and the grounding terminal are located in the guide sleeve in this utility model;

[0028] Figure 9 This is a schematic diagram of the grounding terminal in this utility model;

[0029] Figure 10 This is a schematic diagram of the main wire terminal in this utility model;

[0030] Figure 11 This is a schematic diagram of the support frame in this utility model;

[0031] Figure 12 This is a schematic diagram of the connection between the solenoid valve and the support frame in this utility model.

[0032] In the diagram, 1 - thermocouple;

[0033] 2-Solenoid valve;

[0034] 3-Guide sleeve body; 31a-Limiting component; 31b-Limiting protrusion; 31c-Gap two; 31d-Limiting groove; 32-Protrusion; 33-Cavity; 34-Opening; 35-Clamping part; 36-Slot; 37-Protrusion; 38-Guide hole; 39-Limiting part; 310-Protrusion; 311-Guide block; 312-Gap one;

[0035] 4-Grounding terminal; 41-Connection part; 42-Mounting part one; 43-Guide part;

[0036] 5-Main line terminal; 51-Mounting part two;

[0037] 6-Grounding conductor;

[0038] 7-Phase conductor;

[0039] 8-Support frame; 81-Mounting hole; 82-Support part;

[0040] 9-Pin. Detailed Implementation

[0041] like Figures 1 to 12 As shown, this utility model discloses a gas flameout protection device, comprising a thermocouple 1, a solenoid valve 2, and a guide sleeve 3. The thermocouple 1 is provided with a phase conductor 7 and a grounding conductor 6; the solenoid valve 2 is correspondingly provided with a support frame 8 and a pin 9, and the support frame 8 is provided with a mounting hole 81. The solenoid valve 2 of this utility model is prior art, therefore the structure of the solenoid valve 2 will not be described in detail.

[0042] The guide sleeve is made of plastic and is an insulator. The guide sleeve includes a guide sleeve body 3 and a limiting member 31a. The guide sleeve body 3 has two cavities 33 and an opening 34 that communicates with the cavities 33, allowing the cavities 33 to be vertically connected. The main line terminal 5 is placed in one cavity 33, and the grounding terminal 4 is placed in the other cavity 33. The grounding terminal 4 and the main line terminal 5 form a terminal assembly, allowing them to be concealed within the guide sleeve body 3. This protects the grounding terminal 4 and the main line terminal 5, ensuring a good connection between the solenoid valve 2 and the thermocouple 1, and improving the stability and reliability of the connection. Simultaneously, it allows for a more compact connection between the solenoid valve 2 and the thermocouple 1, simplifying the installation and maintenance process of the thermocouple 1.

[0043] The guide sleeve body 3 is provided with a limiting part 39, which is disposed in the cavity 33. The limiting part 39 is provided with a protrusion 310, and a gap 312 is formed between the limiting part 39 and the guide sleeve body 3. The limiting part 39 is elastic and undergoes elastic deformation through the gap 312. Both the main line terminal and the grounding terminal are provided with mounting parts, which are limited on the protrusion 310.

[0044] The grounding terminal 4 is sheared and bent outward to form a mounting portion 42. When the grounding terminal 4 is installed into the cavity 33 from bottom to top, the limiting portion 39 undergoes elastic deformation through the gap 312. At the same time, the deformed mounting portion 42 passes over the limiting portion 39. After the mounting portion 42 and the limiting portion 39 return to their original deformation, the mounting portion 42 is stopped downward on the protrusion 310 of the limiting portion 39. The grounding terminal 4 is bent to form a connecting portion 41, which is attached to the outside of the support frame 8, so that the grounding terminal 4 is connected to the support frame 8. The grounding terminal 4 is provided with a guide portion 43, and the guide sleeve is provided with a guide groove. The guide portion 43 is provided in the guide groove and moves up and down along the guide groove, so that the grounding terminal 4 is more stable during installation.

[0045] The main wire terminal 5 is cut and bent to form the second mounting part 51. When the main wire terminal 5 is installed into the cavity 33 from bottom to top, the limiting part 39 undergoes elastic deformation through the gap 312. After the limiting part 39 recovers its deformation, the second mounting part 51 is limited downward on the protrusion 310 of the limiting part 39.

[0046] Grounding terminal 4 connects grounding conductor 6 and support frame 8, and main line terminal 5 connects phase conductor 7 and pin 9. The opening 34 corresponding to pin 9 is provided with guide hole 38. The guide hole 38 and pin 9 are correspondingly set. The diameter of guide hole 38 gradually increases from bottom to top, so that the cross-section of guide hole 38 is frustum-shaped, which facilitates the insertion of thermocouple 1 into solenoid valve 2.

[0047] The present invention provides a specific design for the detachable connection of thermocouple 1 and solenoid valve 2: the guide sleeve body 3 is provided with a protrusion 32, and one end of an elastic limiting member 31a is fixed on the protrusion 32. At the same time, there is a gap 31c between the limiting member 31a and the guide sleeve body 3. When the guide sleeve body 3 is inserted into the mounting hole 81, the limiting member 31a undergoes elastic deformation through the gap 31c and is limited at the support frame 8, so that the guide sleeve and the support frame 8 are connected. When a force is applied inward to the limiting member 31a, the limiting member 31a can be disengaged from the support frame 8, and the guide sleeve can be removed from the support frame 8.

[0048] The top of the limiting member 31a is provided with a limiting protrusion 31b, and a limiting groove 31d is formed between the limiting protrusion 31b and the limiting member 31a. The support frame 8 is provided with a support part 82, and the limiting protrusion 31b is supported on the support part 82. The support part 82 is embedded in the limiting groove 31d. When the thermocouple 1 is inserted into the support frame 8, the limiting member 31a in the plastic part will be inverted to lock onto the support frame 8, thereby fixing the guide sleeve. Moreover, considering that the limiting member 31a undergoes elastic deformation through the gap 31c, the width of the limiting protrusion 31b can be increased, thereby increasing the contact area between the limiting member 31a and the support frame 8, making the connection between the limiting member and the support frame 8 more secure.

[0049] The guide sleeve body is provided with two guide blocks 311, and the limiting member 31a is correspondingly provided between the two guide blocks 311. The guide blocks 311 are set along the height direction of the guide sleeve body 3. When the limiting member 31a is installed on the support frame 8, the guide blocks 311 play a guiding role, so that the limiting member 31a and the support frame 8 can be quickly connected.

[0050] The guide sleeve body 3 is provided with a locking part 35, which forms a groove 36 with the guide sleeve body 3. When the guide sleeve body 3 is inserted into the mounting hole 81, the support frame 8 is inserted into the groove 36, so that the locking part 35 is limited to the outside of the support frame 8. The outer side of the guide sleeve body 3 is provided with a protrusion 37, which is in close contact with the inner side of the mounting hole 81. The locking part 35 and the protrusion 37 increase the stability of the connection between the guide sleeve and the support frame 8, preventing shaking and excessive contact gap.

[0051] The above are merely specific embodiments of this utility model, but the technical features of this utility model are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on this utility model to solve essentially the same technical problems and achieve essentially the same technical effects are all covered within the protection scope of this utility model.

Claims

1. A gas flame failure protection device, comprising: a thermocouple, the thermocouple being provided with a phase conductor and a ground conductor; a solenoid valve, the solenoid valve being provided with a support frame and a pin, the support frame being provided with a mounting hole; a guide sleeve, the guide sleeve being provided with a main line terminal and a ground terminal, the ground terminal connecting the ground conductor and the support frame, the main line terminal connecting the phase conductor and the pin; characterized in that: the guide sleeve comprises a guide sleeve body and a limiting piece, the limiting piece being arranged on the guide sleeve body, the guide sleeve body extending into the mounting hole, a gap two being present between the limiting piece and the guide sleeve body, the limiting piece being elastic, the limiting piece being elastically deformed through the gap two, being separated from or limited at the support frame, so that the guide sleeve and the support frame are detachably connected.

2. A gas flame failure protection device according to claim 1, characterised in that: the limiting piece is provided with a limiting protrusion, a limiting groove being formed between the limiting protrusion and the limiting piece, the support frame being provided with a support portion, the limiting protrusion being supported on the support portion, the support portion being arranged in the limiting groove.

3. A gas flame failure protection device according to claim 1, characterised in that: the guide sleeve body is provided with a protruding block, the limiting piece being fixed on the protruding block.

4. A gas flame failure device according to claim 1, wherein: the guide sleeve body is provided with two cavities, the guide sleeve body being provided with an opening, the opening and the cavities being in communication, so that the cavities are through from top to bottom, the main line terminal and the ground terminal being respectively arranged in the corresponding cavities.

5. A gas flame failure protection device according to claim 4, characterised in that: the guide sleeve is provided with a limiting portion, the limiting portion being arranged in the cavity, the main line terminal and the ground terminal being limited on the corresponding limiting portion.

6. A gas flame failure device according to claim 5, wherein: the ground terminal is provided with a guide portion, the guide sleeve being provided with a guide groove, the guide portion being arranged in the guide groove and moving up and down along the guide groove.

7. A gas flame failure device according to claim 4, wherein: the guide sleeve body is provided with a clamping portion, the clamping portion and the guide sleeve body being provided with a slot, the support frame being inserted into the slot, so that the clamping portion is limited on the outside of the support frame.

8. A gas flame failure device according to claim 7, characterised in that: the guide sleeve body is provided with a protruding strip, the protruding strip being close to the inside of the mounting hole.

9. A gas flame failure device according to claim 4, wherein: the opening is provided with a guide hole, the guide hole and the pin being correspondingly arranged, the caliber of the guide hole gradually increasing from bottom to top.

10. A gas flame failure device according to claim 1, characterised in that: the guide sleeve body is provided with a guide block, the guide block and the limiting piece being correspondingly arranged, the guide block being arranged along the height direction of the guide sleeve body.

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