A K-type self-resetting temperature detector for vehicle fire extinguishing

Abstract

The present invention discloses a K-type self-resetting temperature detector for vehicle fire extinguishing, which includes a housing. Terminals are provided at the inner end of the housing, and pins are inserted on the terminals. An extended temperature sensing surface is provided on the outer end face of the housing. The structural feature is that a housing frame is sleeved outside the housing, fastening rings are provided at the outer ends of the housing and the housing frame, an outer shell is provided at the inner end of the housing, a PG pipe body is inserted at the other end of the outer shell, a flame retardant sheath is inserted on the PG pipe body, a high-temperature flame retardant wire is passed through the flame retardant sheath, and the high-temperature flame retardant wire is electrically connected to the pin. The present invention has improvements in functions such as waterproof, high and low temperature resistance, corrosion resistance, earthquake resistance, etc., achieving the technical effect of adapting to different environments.

Description

Technical Field

[0001] The present invention belongs to the field of automatic control, and particularly relates to a waterproof, high and low temperature resistant, corrosion resistant, and earthquake resistant switch element. Background Art

[0002] With the application of automatic temperature control switches in different industries, different environments, and different places, the requirements for automatic temperature control switches have increased. Some components used in ordinary occasions and environments cannot be used in harsh and special environments. Therefore, it is very necessary for temperature control automatic switch components to have functions of waterproof, high temperature resistant, corrosion resistant, and earthquake resistant. Most of the existing technologies are used in places where the environment (temperature, humidity, vibration) is relatively mild and the usage conditions are not harsh. However, it is very necessary and meaningful to have functions of waterproof, corrosion resistant, and earthquake resistant. When the temperature sensing surface contacts the object to be measured, it receives the temperature of the object to be measured through heat transfer. When the temperature reaches a certain level, the metal inside the component expands thermally under physical properties, closing or disconnecting the internal contacts, thereby achieving the function of a switch to control the closing and opening of the circuit. The following disadvantages exist in the existing technologies: 1. There is no protection outside the structure, and the pins are easy to fall off when subjected to external pulling and vibration. 2. The installation position is limited. Since there is no other position for fixing the structure, the temperature sensing surface can only be attached to the surface of the object to be measured and fixed through the fixing holes. 3. In the case of acid mist, especially the terminal pins, the housing, and the pins are not protected and are easily corroded to varying degrees, resulting in short circuits. 4. It is not waterproof and is easily short circuited in a humid environment. It cannot directly measure the temperature of liquid media. Summary of the Invention

[0003] The purpose of the present invention is to provide an improvement in functions such as waterproof, high and low temperature resistant, corrosion resistant, and earthquake resistant, so as to achieve a K-type self-resetting temperature detector for vehicle fire extinguishing that can adapt to different environments.

[0004] To achieve the above purpose, the present invention provides the following technical solution: A K-type self-resetting temperature detector for vehicle fire extinguishing, including a housing. A terminal is provided at the inner end of the housing, and pins are inserted on the terminal. An extended temperature sensing surface is provided on the outer end surface of the housing. Its structural feature is that a housing frame is sleeved outside the housing. A fastening ring is provided at the outer ends of the housing and the housing frame. An outer shell is provided at the inner end of the housing. A PG pipe body is inserted at the other end of the outer shell. A flame retardant sheath is inserted on the PG pipe body. A high temperature resistant flame retardant wire passes through the flame retardant sheath, and the high temperature resistant flame retardant wire is electrically connected to the pins.

[0005] As an improved technical solution, a housing outer gasket for sealing is provided between the fastening ring and the outer end of the housing frame.

[0006] As an improved technical solution, an inner fastening nut is provided on the PG pipe body inside the outer shell. An inner waterproof gasket is provided between the inner fastening nut and the inner end wall at the inner end of the outer shell.

[0007] As an improved technical solution, an external fastening nut is provided on the PG pipe body outside the housing, and an external waterproof gasket is provided between the external fastening nut and the outer end wall at the inner end of the housing.

[0008] As an improved technical solution, a locking cap is provided at the end of the PG pipe body outside the housing, and a conical sealing ring is provided between the locking cap and the PG pipe body.

[0009] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0010] The housing can isolate the external contact with the terminal pins, the housing and the plug pins, can achieve waterproofing and humidity-free limitation (can be directly used in water), and avoid the occurrence of short circuits caused by the corrosion of the external environment on the terminal pins, the housing and the plug pins. It is corrosion-resistant (can be used in acid mist and seawater), shock-resistant and tensile-resistant (with a protective layer outside and threaded connection), and has a wide working temperature range (the operating environment temperature is -40°C to 200°C). BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a structural schematic diagram of the prior art;

[0012] Figure 2 is a structural schematic diagram of the present invention;

[0013] In the figure: A1. Terminal pin, A2. Housing, A3. Fixed ring, A4. Fixed hole, A5. Temperature sensing surface, A6. Plug pin, A7. Electric wire, 1. Flame retardant sheath, 2. Locking cap, 3. PG pipe body, 4. External waterproof gasket, 5. Internal fastening nut, 6. Housing, 7. High temperature flame retardant electric wire, 8. Plug pin, 9. Fastening bolt, 10. Fastening ring, 11. Conical sealing ring, 12., External fastening nut, 13., Internal waterproof gasket, 14. Connecting thread, 15. Housing frame, 16. External housing sealing gasket, 17. Temperature sensing surface, 18. Terminal, 19. Housing, 20. Internal housing sealing gasket. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0015] For a better understanding of the present invention, the temperature control starter in the prior art will be briefly described below with reference to Figure 1As described above, the temperature-controlled starter includes a housing A2. A temperature-sensing surface A5 is provided at the outer end of the housing A2. A fixing ring A3 is provided on the side wall of the housing A2, and a fixing hole A4 is formed in the fixing ring A3. A pin A6 is provided at the inner end of the housing A2, and a wire A7 is connected to the pin A6. When the temperature-sensing surface A5 contacts the object to be measured, it receives the temperature of the object to be measured through heat transfer. When a certain temperature is reached, the metal inside the component expands due to heat under physical properties, closing or disconnecting the internal contact, thereby achieving the function of a switch to control the closing and opening of the circuit. Disadvantages and deficiencies of the prior art: There is no protection on the outside of the structure, and the pin A6 is likely to fall off when subjected to external pulling and vibration. The installation position is limited because there is no other position for fixing the structure, and it can only be fixed by attaching the temperature-sensing surface A5 to the surface of the object to be measured through the fixing hole A4. In the case of acid mist, especially the terminal feet A1, the housing A2, and the pin A6 are not protected and are easily corroded to varying degrees, causing a short circuit. It is not waterproof and is prone to short circuit in a humid environment. It cannot directly measure the temperature of liquid media. To solve the above problems, refer to Figure 2 As shown, the K-type self-resetting temperature detector for vehicle fire extinguishing includes a housing 19. An extended temperature-sensing surface 17 is provided on the outer end face of the housing 19. A metal contact is provided inside the housing 19. The temperature-sensing surface 17 controls the closing and opening of the metal contact. When the temperature-sensing surface 17 contacts the object to be measured, it receives the temperature of the object to be measured through heat transfer. When a certain temperature is reached, the metal inside the housing 19 expands due to heat under physical properties, closing or disconnecting the internal contact, thereby achieving the function of a switch to control the closing and opening of the circuit. A housing frame 15 is sleeved outside the housing 19. A fastening ring 10 is provided at the outer end of the housing frame 15. The fastening ring 10 is provided with a through hole that cooperates with the temperature-sensing surface 17. The fastening ring 10 is fixedly installed at the outer ends of the housing 19 and the housing frame 15 through fixing bolts. A housing outer sealing gasket 16 for sealing is provided between the fastening ring 10 and the outer ends of the housing 19 and the housing frame 15. A terminal 18 is provided at the inner end of the housing 19. A pin 8 is inserted on the terminal 18. An inwardly protruding installation section is provided at the inner end of the housing 19. A housing 6 is fixedly installed on the installation section. A housing inner sealing gasket 20 is provided between the housing 6 and the housing 19. A through hole is formed in the housing frame 15. A fastening bolt 9 passes through the through hole to penetrate the fastening ring 10, the housing outer sealing gasket 16, the housing frame 15, and the housing inner sealing gasket 20 together, thereby ensuring the sealing of the housing 19 and avoiding external corrosion and influence. A PG pipe body 3 is inserted at the other end of the housing 6. An inner fastening nut 5 is provided on the PG pipe body 3 inside the housing 6. An inner waterproof gasket 13 is provided between the inner fastening nut 5 and the inner end wall of the inner end of the housing 6. An outer fastening nut 12 is provided on the PG pipe body 3 outside the housing 6. An outer waterproof gasket 4 is provided between the outer fastening nut 12 and the outer end wall of the inner end of the housing 6. A locking cap 2 is provided at the end of the PG pipe body 3 outside the housing 6. A tapered sealing ring 11 is provided between the locking cap 2 and the PG pipe body 3. A flame-retardant sheath 1 is inserted on the PG pipe body 3. A high-temperature flame-retardant wire 7 is passed through the flame-retardant sheath 1. The high-temperature flame-retardant wire 7 is electrically connected to the pin 8.

[0016] When the present invention is in use, the housing 19 is fixed and sealed: First, connect the housing 19 with the housing frame 15, the outer housing gasket 16, and the fastening ring 10 together, then tighten and close with the fastening bolts 9, and finally install the inner housing gasket 20. The PG waterproof joint is fixed and sealed: First, insert half of the length of the PG pipe body 3 into the installation hole of the outer shell 6, then respectively put on the inner waterproof gasket 13 and the outer waterproof gasket 4 on the PG pipe body 3, and finally tighten and close the inner fastening nut 5 and the outer fastening nut 12. The circuit is connected and fixed: First, pass two high-temperature flame-retardant wires 7 through the flame-retardant sheath 1, then pass the flame-retardant sheath 11 together with the high-temperature flame-retardant wires into the PG pipe body 3, after passing through the outer shell 66, connect one end of the two high-temperature flame-retardant wires to the pins 8 respectively, and finally insert the two pins 8 into the terminals 18 respectively. First, connect the outer shell 6 with the housing frame 15 through the connecting thread 14, then put on the tapered sealing ring 11 and the locking cap 2 from one end of the flame-retardant sheath 1, and finally lock the locking cap 2 until it is airtight.

[0017] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A K-type self-resetting temperature detector for vehicle fire extinguishing, comprising a housing (19), a terminal (18) is provided at the inner end of the housing (19), a pin (8) is inserted on the terminal (18), and an extended temperature sensing surface (17) is provided on the outer end surface of the housing (19), characterized in that The outside of the housing (19) is sleeved with a housing frame (15). A fastening ring (10) is provided at the outer ends of the housing (19) and the housing frame (15). A housing outer gasket (16) for sealing is provided between the fastening ring (10) and the outer end of the housing frame (15). An outer shell (6) is provided at the inner end of the housing (19). A PG pipe body (3) is inserted at one end of the outer shell (6) away from the inner end of the housing (19). A locking cap (2) is provided at the end of the PG pipe body (3) outside the outer shell (6). A conical sealing ring (11) is provided between the locking cap (2) and the PG pipe body (3). An inner fastening nut (5) is provided on the PG pipe body (3) inside the outer shell (6). An inner waterproof gasket (13) is provided between the inner fastening nut (5) and the inner end wall inside the outer shell (6). A flame-retardant sheath (1) is inserted on the PG pipe body (3). A high-temperature flame-retardant wire (7) is threaded through the flame-retardant sheath (1). The high-temperature flame-retardant wire (7) is electrically connected to the pin (8). An outer fastening nut (12) is provided on the PG pipe body (3) outside the outer shell (6). An outer waterproof gasket (4) is provided between the outer fastening nut (12) and the outer end wall outside the outer shell (6).

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