Shock-resistant temperature sensor

Abstract

An anti-seismic temperature sensor comprises a B-type junction box, a ceramic wiring board is arranged in an inner cavity of the B-type junction box, an asbestos gasket is arranged between the ceramic wiring board and the bottom of the inner cavity of the B-type junction box, and two screw grooves are symmetrically formed in the side wall body of the B-type junction box; according to the utility model, the ceramic wiring board is connected with the bottom of the B-type junction box through the spring, the limiting protection tube and the screw, and energy generated when equipment to be detected shakes can be absorbed through the elasticity of the spring, so that the screw is prevented from swinging, and the ceramic wiring board is firmly installed in the inner cavity of the B-type junction box; the limiting protection pipe is sleeved on the screw to prevent the screw from impacting the ceramic wiring board after loosening, damage to the ceramic wiring board is reduced, measurement accuracy is guaranteed, the service life is prolonged, shock resistance is improved, meanwhile, an output wire of the temperature sensor is connected with the wiring strip in a welded mode, and equipment stability is improved.

Description

Technical Field

[0001] This utility model relates to the field of sensors, and in particular to a shock-resistant temperature sensor. Background Technology

[0002] A temperature sensor is a sensor that can sense temperature and convert it into a usable output signal. Temperature sensors are the core component of temperature measuring instruments. There are many types of temperature sensors. According to the measurement method, they can be divided into two main categories: contact type and non-contact type. According to the characteristics of sensor materials and electronic components, they can be divided into two categories: resistance temperature detectors (RTDs) and thermocouples.

[0003] At present, as temperature sensors are used in more and more fields, their operating environments are becoming increasingly harsh. In environments with frequent vibrations, a single fixed thread structure is usually used. This method has poor shock resistance and, after a long period of use, it will still loosen and damage the ceramic terminal block. Utility Model Content

[0004] The purpose of this invention is to provide a shock-resistant temperature sensor to solve the problems mentioned in the background art.

[0005] The technical problem solved by this utility model is achieved through the following technical solution:

[0006] A shock-resistant temperature sensor includes a type B junction box. The junction box contains a ceramic terminal block, and a stainless steel plate is positioned between the ceramic terminal block and the bottom of the junction box. An asbestos gasket is placed between the ceramic terminal block and the stainless steel plate. Two screw recesses are symmetrically arranged on the side wall of the junction box. Each screw recess has an opening at its bottom on the stainless steel plate. A limiting protective tube extends through the opening and can move within a limited range. A spring is located on the outer wall of the limiting protective tube, with one end of the spring engaging with the screw recess. One end contacts the groove wall, and the other end contacts one end of the limiting protection tube. A screw passes through the limiting protection tube and is connected to the bottom of the inner cavity of the B-type junction box. A channel is formed at the center of the ceramic terminal block. Grooves are evenly provided at the top of the ceramic terminal block. A terminal is provided inside the groove. The terminal consists of a terminal piece and a terminal strip. The terminal piece is connected to the groove wall by a terminal screw. A connecting screw is provided at the bottom of the B-type junction box. A protective tube passes through the connecting screw. The protective tube is welded and fixed to the connecting screw. A temperature sensor is provided in the inner cavity at the bottom of the protective tube.

[0007] Preferably, the temperature sensor can be a resistance temperature detector (RTD) or a thermocouple.

[0008] Preferably, the protective tube is provided with a process connection thread.

[0009] Preferably, the output wire of the temperature sensor is welded to the wiring strip through the inside of the protective tube.

[0010] Preferably, the external device wires are directly connected to the wiring screws.

[0011] Preferably, the number of grooves is set to six, which are evenly distributed on the top of the ceramic terminal block.

[0012] The advantages and positive effects of this utility model are:

[0013] 1. This utility model connects the ceramic terminal block and the bottom of the B-type junction box using a spring, a limiting protective tube, and a screw. The elasticity of the spring absorbs the energy generated when the device under test vibrates, thus preventing the screw from swinging and ensuring that the ceramic terminal block is firmly installed in the inner cavity of the B-type junction box. Furthermore, the limiting protective tube, which is fitted over the screw, prevents the screw from hitting the ceramic terminal block after it loosens, reducing damage to the ceramic terminal block, ensuring measurement accuracy, increasing service life, and improving shock resistance. At the same time, the output wire of the temperature sensor is welded to the terminal block, improving the stability of the device. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0015] Figure 1 This is a schematic diagram of the overall front view structure of a shock-resistant temperature sensor according to this utility model;

[0016] Figure 2 This utility model Figure 1 Enlarged structural diagram at point A in the middle;

[0017] Figure 3 This utility model Figure 2 Schematic diagram of the internal structure of the Type B junction box 10;

[0018] Figure 4 This utility model Figure 3 Mid-top view of the structure;

[0019] Figure 5 This utility model Figure 4 Schematic diagram of the structure at point BB;

[0020] Figure 6 This utility model Figure 3 Schematic diagram of the terminal block component.

[0021] The markings in the attached diagram are described as follows: 10. Type B junction box; 11. Asbestos gasket; 12. Ceramic terminal block; 13. Terminal block; 14. Screw; 15. Spring; 16. Limit protection tube; 17. Connecting screw; 18. Protective tube; 19. Process connection thread; 20. Temperature sensor; 21. Screw groove; 22. Groove; 23. Opening; 24. Channel; 25. Wiring screw; 26. Wiring piece; 27. Wiring strip; 28. Stainless steel plate. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0023] The following is combined with Figure 1-6 This utility model will be described in detail below. For ease of description, the directions mentioned below are defined as follows: the directions of up, down, left, right, front, and back mentioned below are the same as... Figure 1 The directions of front, back, left, right, up, and down in the view are consistent. Figure 1 This is a front view of the device of this utility model. Figure 1 The directions shown are consistent with the front-facing, back-facing, left-right, up-down directions of the device.

[0024] The embodiments of this utility model will be further described in detail below with reference to the accompanying drawings:

[0025] Please see Figure 1-6This utility model provides an embodiment of a shock-resistant temperature sensor, comprising a type B junction box 10. The inner cavity of the type B junction box 10 is provided with a ceramic terminal plate 12. A stainless steel plate 28 is disposed between the ceramic terminal plate 12 and the bottom of the inner cavity of the type B junction box 10. An asbestos gasket 11 is disposed between the ceramic terminal plate 12 and the stainless steel plate 28. Two screw grooves 21 are symmetrically provided on the side wall of the type B junction box 10. Each screw groove 21 has an opening 23 at its bottom on the stainless steel plate 28. A limiting protection tube 16 passes through the opening 23, allowing for limited movement within the opening 23. A spring 15 is provided on the outer wall of the limiting protection tube 16, with one end of the spring 15 connected to the screw groove. One end of the screw contacts the wall of the groove 21, and the other end contacts one end of the limiting protection tube 16. A screw 14 is inserted through the limiting protection tube 16. The screw 14 is connected to the bottom of the inner cavity of the B-type junction box 10. A channel 24 is provided at the center of the ceramic terminal block 12. Grooves 22 are evenly provided at the top of the ceramic terminal block 12. A terminal block 13 is provided inside the groove 22. The terminal block 13 is composed of a terminal piece 26 and a terminal strip 27. The terminal piece 26 is connected to the wall of the groove 22 by a terminal screw 25. A connecting screw 17 is provided at the bottom of the B-type junction box 10. A protective tube 18 is inserted through the connecting screw 17. The protective tube 18 is welded and fixed to the connecting screw 17. A temperature sensor 20 is provided in the inner cavity at the bottom of the protective tube 18.

[0026] In another embodiment, the temperature sensor 20 may be a resistance temperature detector (RTD) or a thermocouple.

[0027] In another embodiment, the protective tube 18 is fixedly provided with a process connection thread 19.

[0028] In another embodiment, the output wire of the temperature sensor 20 is welded to the wiring strip 27 through the inside of the protective tube 18.

[0029] In another embodiment, the external device wires are directly connected to the wiring screw 25.

[0030] In another embodiment, the number of grooves 22 is set to six, which are evenly distributed on the top of the ceramic terminal block 12.

[0031] In practical implementation, this device is connected to the device under test via process connection thread 19. The temperature sensor 20 contacts the fluid in the device under test to collect values. The signal is transmitted through wires, the connecting piece 26 in the terminal block 13, the connecting strip 27, the connecting screw 25, and the external device wires. In real-world use, because the device under test is in operation, it will be constantly vibrating. At this time, the ceramic terminal block 12 and the type B junction box 10 may not make a firm contact, causing the ceramic terminal block 12 to loosen, resulting in loose wiring and affecting test accuracy. However, in this device... The ceramic terminal block 12 and the bottom of the type B junction box 10 are connected by a spring 15, a limit protection tube 16, and a screw 14. The elasticity of the spring 15 can absorb the energy generated when the device under test vibrates, thereby preventing the screw 14 from swinging. This ensures that the ceramic terminal block 12 is firmly installed in the inner cavity of the type B junction box 10. Furthermore, the limit protection tube 16 is fitted over the screw 14 to prevent the screw from hitting the ceramic terminal block 12 after it loosens, reducing the damage to the ceramic terminal block 12, ensuring measurement accuracy, and increasing service life. At the same time, the output wire of the temperature sensor 20 is welded to the wiring strip 27 to ensure stability.

[0032] It should be emphasized that the embodiments described in this utility model are illustrative rather than limiting. Therefore, this utility model is not limited to the embodiments described in the specific implementation. Any other implementation methods derived by those skilled in the art based on the technical solutions of this utility model are also within the scope of protection of this utility model.

Claims

1. A shock-resistant temperature sensor, comprising a type B junction box (10), characterized in that: The inner cavity of the type B junction box (10) is provided with a ceramic terminal plate (12). A stainless steel plate (28) is provided between the ceramic terminal plate (12) and the bottom of the inner cavity of the type B junction box (10). An asbestos gasket (11) is provided between the ceramic terminal plate (12) and the stainless steel plate (28). Two screw grooves (21) are symmetrically provided on the side wall of the type B junction box (10). The bottom of each screw groove (21) is provided with an opening (23) on the stainless steel plate (28). A limiting protection tube (16) is provided through the opening (23). The limiting protection tube (16) can move within the opening (23). A spring (15) is provided on the outer wall of the limiting protection tube (16). One end of the spring (15) contacts the wall of the screw groove (21), and the other end contacts the limiting protection tube. (16) One end is in contact, and a screw (14) is provided through the limiting protection tube (16). The screw (14) is connected to the bottom of the inner cavity of the B-type junction box (10). A channel (24) is provided at the center of the ceramic terminal block (12). A groove (22) is provided evenly at the top of the ceramic terminal block (12). A terminal block (13) is provided inside the groove (22). The terminal block (13) is composed of a connecting piece (26) and a connecting strip (27). The connecting piece (26) is connected to the wall of the groove (22) by a connecting screw (25). A connecting screw (17) is provided at the bottom of the B-type junction box (10). A protective tube (18) is provided on the connecting screw (17). The protective tube (18) is welded and fixed to the connecting screw (17). A temperature sensor (20) is provided in the inner cavity at the bottom of the protective tube (18).

2. The shock-resistant temperature sensor according to claim 1, characterized in that: The temperature sensor (20) can be a resistance temperature detector (RTD) or a thermocouple.

3. The shock-resistant temperature sensor according to claim 1, characterized in that: The protective tube (18) is fixedly provided with a process connection thread (19).

4. The shock-resistant temperature sensor according to claim 1, characterized in that: The output wire of the temperature sensor (20) is welded to the wiring strip (27) through the inside of the protective tube (18).

5. The shock-resistant temperature sensor according to claim 1, characterized in that: External device wires are directly connected to the wiring screw (25).

6. The shock-resistant temperature sensor according to claim 1, characterized in that: The number of grooves (22) is set to six, which are evenly distributed on the ceramic terminal block (12).

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