A temperature and pressure integrated sensor convenient for welding processing

Abstract

This utility model discloses an integrated temperature and pressure sensor that is easy to weld and process, relating to the field of temperature and pressure sensor technology. It includes a copper tube body, with a sensor housing snapped onto the top of the copper tube body. A temperature measuring component is disposed inside the sensor housing. A locking mechanism for fixation is installed at one end between the sensor housing and the copper tube body. In this easily weldable integrated temperature and pressure sensor, the temperature sensor body inside the sensor housing is located at the upper end of the copper tube body. The copper tube body provides basic positional constraint for the temperature sensor body. A threaded layer is fitted onto the lower end of the outer side of the sensor housing, and a limiting sleeve connects to it threadedly, restricting the position of the threaded layer. The limiting sleeve also blocks the gap between the sensor housing and the heat insulation mechanism, reducing the infiltration of high-temperature moisture and effectively ensuring more accurate data detection later.

Description

Technical Field

[0001] This utility model relates to the field of temperature and pressure sensor technology, specifically to an integrated temperature and pressure sensor that is easy to weld and process. Background Technology

[0002] The integrated temperature and pressure sensor is a new type of sensor that integrates temperature and pressure measurement functions into one device. By combining temperature-sensitive and pressure-sensitive elements in the same device, it achieves synchronous measurement of temperature and pressure. Through the integration of temperature and pressure measurement functions, the integrated temperature and pressure sensor can simultaneously monitor key parameters inside the compressor and related systems. In use, traditional integrated temperature and pressure sensors are unsuitable for temperature sensor installation due to excessively high welding temperatures. Therefore, the temperature sensor needs to be placed at a distance from the welding component to avoid damage to the temperature sensor during welding.

[0003] To overcome the above-mentioned defects, the prior art (Chinese patent with announcement number CN217716478U, announcement date 2022-11-01) provides a temperature and pressure integrated sensor, including a sensor base, one end of which has a mounting cavity, and the other end extends to form a reinforcing protrusion. The reinforcing protrusion and the end face of the sensor base form a stepped surface. It also includes a first mounting hole penetrating the reinforcing protrusion and the sensor base, in which a temperature sensor is installed. It also includes a pressure measuring hole connecting the end face of the reinforcing protrusion and the bottom surface of the mounting cavity, in which a pressure sensor is disposed in the mounting cavity and corresponds to the pressure measuring hole. The mounting cavity is provided with a pressing assembly for pressing the temperature sensor and the pressure sensor. It also includes a cavity expansion transition piece threaded to the inner wall of the mounting cavity of the sensor base, in which a circuit board is installed and connected to the pressure sensor and the temperature sensor. A transmitter housing is also connected to the cavity expansion transition piece, and the transmitter is disposed in the transmitter housing.

[0004] The aforementioned mechanism achieves sensor installation through threaded connection and sealing mechanism. However, in actual use, since copper tube welding requires high temperatures (usually exceeding 300°C), directly installing the temperature sensor near the welding point will cause sensor damage and shorten the sensor's lifespan. Therefore, it is necessary to protect the sensor separately to extend its lifespan. Summary of the Invention

[0005] The purpose of this invention is to provide a temperature and pressure integrated sensor that is easy to weld, in order to solve the problem mentioned in the background art that the temperature sensor installed directly near the welding part will be damaged due to the high temperature required for copper tube welding (usually exceeding 300°C), resulting in a shortened service life of the sensor.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a temperature and pressure integrated sensor that is easy to weld and process, comprising a copper tube body and a sealing ring, wherein a sensor housing is snapped onto the top end of the copper tube body, and a temperature measuring component is disposed inside the sensor housing; the temperature measuring component includes a circuit board, and the circuit board is fixedly connected to the upper end inside the sensor housing, a pressure core is disposed below the circuit board, and two sealing rings are disposed at the lower end of the pressure core, and a temperature sensor body is installed at the middle position of the bottom end of the pressure core.

[0007] Furthermore, a locking mechanism for fixing is installed at one end between the sensor housing and the copper tube body, and a heat insulation mechanism is provided on the outside of the copper tube body.

[0008] Furthermore, the locking mechanism includes a threaded layer, which is sleeved on the outside of the circuit board. The outer side of the threaded layer has a threaded groove, which is adapted to the inner side of the limiting sleeve. The limiting sleeve can block the gap between the sensor housing and the heat insulation mechanism, allowing the internal sealing ring to play a stable sealing role, reducing temperature loss, and preventing moisture infiltration. This makes subsequent use more stable and effectively ensures more accurate data querying.

[0009] Furthermore, a connecting spring is installed at the bottom of the sealing ring, and the connecting springs are evenly distributed at the bottom of the sealing ring. When the limiting sleeve is squeezed, the spring installed at the bottom will shorten its length, thereby causing the sealing ring to be stressed and deformed, which facilitates better sealing.

[0010] Furthermore, the sealing ring has a "J"-shaped cross-section and is symmetrical about the vertical central axis of the copper tube body. When the sealing ring is pressed, it will automatically deform and fill the gap. After pressing, the sealing ring will automatically reset its shape, which facilitates repeated pressing and sealing processes. Due to its shape, the sealing ring can achieve self-sealing compensation when pressed, resulting in a better overall sealing effect.

[0011] Furthermore, the heat insulation mechanism includes a ceramic fiber sleeve, which is sleeved on the outside of the copper tube body. A separator layer is provided on the outside of the ceramic fiber sleeve, and a protective layer is sleeved on the outside of the separator layer. The ceramic fiber sleeve is mainly composed of aluminum silicate and is a fire-resistant heat insulation material reinforced with alkali-free glass fiber or heat-resistant steel wire. It has the characteristics of high temperature resistance, heat insulation, electrical insulation, corrosion resistance, lightweight and high strength. Compared with glass fiber sleeve, ceramic fiber sleeve has a higher level of electrical insulation performance and can maintain a stable insulation effect in high temperature environment to prevent current leakage or short circuit. Under high temperature conditions, the sleeve can still maintain good insulation performance to ensure the safe operation of electrical equipment.

[0012] Furthermore, the cross-section of the separator layer is semi-circular, and the separator layers are distributed at equal angles on the outside of the ceramic fiber sleeve.

[0013] Compared with existing technologies, the beneficial effects of this utility model are: 1. The temperature sensor body can be made of metal pins. If metal pins are used, the temperature sensor body is located inside the sensor housing to avoid short circuit signal abnormalities caused by the temperature sensor body touching the housing. Alternatively, the pins can be made of insulating material. If an insulating material is used, the temperature sensor probe is at least 2cm away from the end of the copper tube (i.e., the end of the copper tube furthest from the pressure sensing core) to ensure a sufficient safe welding distance between the copper tube and the pipe being measured.

[0014] Furthermore, the temperature sensor body inside the sensor housing is located at the upper end of the copper tube body. The copper tube body can be used to restrict the position of the temperature sensor body. The threaded layer is sleeved on the lower end of the outer side of the sensor housing. A limiting sleeve is used to connect with it by threads and restrict the position of the threaded layer. The limiting sleeve can block the gap between the sensor housing and the heat insulation mechanism, reduce the infiltration of high temperature moisture, and effectively ensure more accurate data detection in the future.

[0015] Furthermore, by placing the ceramic fiber sleeve over the application location, the internal copper tube can be protected. A separator layer separates the ceramic fiber sleeve from the protective layer, facilitating better positioning of the temperature sensor. The ceramic fiber sleeve, primarily composed of aluminum silicate, is a fire-resistant and heat-insulating material reinforced with alkali-free glass fiber or heat-resistant steel wire. It possesses properties such as high temperature resistance, heat insulation, electrical insulation, corrosion resistance, and lightweight yet high strength. Compared to glass fiber sleeves, ceramic fiber sleeves offer superior electrical insulation performance, maintaining stable insulation even at high temperatures to prevent current leakage or short circuits. Under high-temperature conditions, the sleeve maintains excellent insulation performance, ensuring the safe operation of electrical equipment.

[0016] 2. A threaded layer is attached to the outside of the copper tube body. The threaded layer and the limiting sleeve are adapted to each other, so that the threaded layer and the limiting sleeve can be more stable during the docking process. When the limiting sleeve is squeezed, the spring installed at the bottom will shorten its length, which will cause the sealing ring to be stressed and deformed. The sealing ring can fill the gap and maintain stable sealing performance.

[0017] Furthermore, the sealing ring has a "J" shaped cross-section, so when the sealing ring is pressed, it will automatically deform and fill the gap. After pressing, the sealing ring will automatically return to its original shape, which facilitates repeated pressing and sealing. Due to its shape, the sealing ring can achieve self-sealing compensation when pressed, which makes the overall sealing effect better and increases the overall stability during use. Attached Figure Description

[0018] Figure 1 This is a front view structural diagram of the present utility model.

[0019] Figure 2 This is a frontal sectional view of the present invention.

[0020] Figure 3 This is a schematic diagram of the heat insulation mechanism of this utility model.

[0021] Figure 4 This is a schematic diagram of the locking mechanism of this utility model.

[0022] Figure 5 This is a partially enlarged structural schematic diagram of the locking mechanism of this utility model.

[0023] Figure 6 This is a partially enlarged structural schematic diagram of the heat insulation mechanism of this utility model.

[0024] In the diagram: 1. Copper tube body; 2. Sensor housing; 3. Circuit board; 4. Pressure core; 5. Sealing ring; 6. Temperature sensor body; 7. Ceramic fiber sleeve; 8. Separating layer; 9. Protective layer; 10. Threaded layer; 11. Limiting sleeve; 12. Sealing ring; 13. Connecting spring. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example 1: As Figure 1 , Figure 2 , Figure 4 and Figure 5The technical solution shown addresses the problem that traditional integrated temperature and pressure sensors are unsuitable for installation due to excessively high welding temperatures, requiring the temperature sensor to be placed far from the welding components to avoid damage during welding. This integrated temperature and pressure sensor, designed for easy welding, discloses a locking mechanism, including a copper tube body 1. A sensor housing 2 is engaged at the top of the copper tube body 1, and a temperature measuring component is located inside the sensor housing 2. The temperature measuring component includes a circuit board 3, which is fixedly connected to the upper part of the sensor housing 2. A pressure core 4 is located below the circuit board 3, and two sealing rings 5 ​​are located at the lower end of the pressure core 4. The temperature sensor body 6 is installed at the middle position of the bottom end of the pressure core 4. The locking mechanism includes a threaded layer 10, which is sleeved on the outside of the circuit board 3.

[0027] In this example, such as Figure 2 As shown, the temperature sensor body 6 can be made of metal pins. If metal pins are used, the temperature sensor body 6 is located inside the sensor housing to avoid short circuits caused by the temperature sensor body 6 touching the housing. Alternatively, it can be made of insulating material. If an insulating material is used, the temperature sensor probe must be at least 2cm away from the end of the copper tube (i.e., the end of the copper tube furthest from the pressure sensing core) to ensure sufficient safe welding distance between the copper tube and the measured pipe. By connecting the copper tube body 1 to the sensor housing 2, the temperature sensor body 6 inside the sensor housing 2 is positioned at the upper end of the copper tube body 1. The copper tube body 1 provides basic positional constraint for the temperature sensor body 6. Figure 4 As shown, the threaded layer 10 is sleeved on the lower end of the outer side of the sensor housing 2. It is connected to the limiting sleeve 11 by thread and the position of the threaded layer 10 is restricted. The limiting sleeve 11 can block the gap between the sensor housing 2 and the heat insulation mechanism, so that the internal sealing ring 12 can play a stable sealing role, reduce temperature loss, and prevent water vapor from seeping in, thereby making subsequent use more stable and effectively ensuring more accurate data query.

[0028] Example 2: Figures 1-3 and Figure 6 The technical solution shown addresses the problem of heat conduction during the use of the copper tube body 1, which can damage the sensor. This easily weldable integrated temperature and pressure sensor discloses a heat insulation mechanism, with the copper tube body 1 having a heat insulation mechanism on its outer side. The heat insulation mechanism includes a ceramic fiber sleeve 7, which is fitted onto the outer side of the copper tube body 1. A separator layer 8 is provided on the outer side of the ceramic fiber sleeve 7, and a protective layer 9 is fitted onto the outer side of the separator layer 8. The separator layer 8 has a semi-circular cross-section and is distributed at equal angles on the outer side of the ceramic fiber sleeve 7.

[0029] In this example, Figure 3 As shown, by fitting the ceramic fiber sleeve 7 onto the position of use, the internal copper tube body 1 can be protected. The separator layer 8 allows for separation between the ceramic fiber sleeve 7 and the protective layer 9, facilitating better positional control of the temperature sensor body 6. Figure 3 As shown, the protective layer 9 reduces heat transfer between the ceramic fiber sleeve 7 and the separator layer 8, thereby improving the stability of the temperature sensor body 6 during use; as Figure 6 As shown, the ceramic fiber sleeve 7 is made of aluminum silicate as the main component and is a fire-resistant and heat-insulating material reinforced with alkali-free glass fiber or heat-resistant steel wire. It has the characteristics of high temperature resistance, heat insulation, electrical insulation, corrosion resistance, lightweight and high strength. Compared with glass fiber sleeve, ceramic fiber sleeve 7 has a higher level of electrical insulation performance. It can maintain a stable insulation effect in high temperature environment, prevent current leakage or short circuit. Under high temperature conditions, the sleeve can still maintain good insulation performance, ensuring the safe operation of electrical equipment.

[0030] Example 3: Figure 1 , Figure 2 , Figure 4 and Figure 5 The technical solution shown addresses the issue of increased sealing stability and reduced wobbling between the copper tube body 1 and the pressure core 4 during the connection of the locking mechanism, achieved through the sealing ring 12. This easily weldable integrated temperature and pressure sensor discloses a sealing mechanism: a threaded groove is provided on the outer side of the threaded layer 10, and this groove is adapted to the inner side of the limiting sleeve 11; a connecting spring 13 is installed at the bottom of the sealing ring 12, and the connecting springs 13 are evenly distributed at the bottom of the sealing ring 12; the cross-section of the sealing ring 12 is J-shaped, and the sealing ring 12 is symmetrical about the vertical central axis of the copper tube body 1.

[0031] In this example, such as Figure 6 As shown, a threaded layer 10 is attached to the outer side of the copper tube body 1. The threaded layer 10 and the limiting sleeve 11 are mutually adapted, thereby making the threaded layer 10 and the limiting sleeve 11 more stable during the docking process. When the limiting sleeve 11 is compressed, the spring installed at the bottom of the limiting sleeve 11 will shorten its length, thereby causing the sealing ring 12 to be stressed and deformed. The sealing ring 12 can fill the gap, so that the sealing ring 12 can maintain stable sealing performance. Figure 5As shown, the cross-section of the sealing ring 12 is "J" shaped. Therefore, when the sealing ring 12 is pressed, it will automatically deform and fill the gap. After pressing, the sealing ring 12 will automatically return to its original shape, which facilitates repeated pressing and sealing processes. Furthermore, due to its shape, the sealing ring 12 can achieve self-sealing compensation when pressed, resulting in a better overall sealing effect and increased overall stability during use.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A temperature and pressure integrated sensor that is easy to weld and process, characterized in that: The device includes a copper tube body (1) and a sealing ring (12). The top end of the copper tube body (1) is connected to a sensor housing (2), and a temperature measuring component is provided inside the sensor housing (2). The temperature measuring component includes a circuit board (3), and the circuit board (3) is fixedly connected to the upper end inside the sensor housing (2). A pressure core (4) is provided below the circuit board (3), and two sealing rings (5) are provided at the lower end of the pressure core (4). A temperature sensor body (6) is installed at the middle position of the bottom end of the pressure core (4).

2. The temperature and pressure integrated sensor that is easy to weld and process according to claim 1, characterized in that: A locking mechanism for fixing is installed at one end between the sensor housing (2) and the copper tube body (1), and a heat insulation mechanism is provided on the outside of the copper tube body (1).

3. The temperature and pressure integrated sensor that is easy to weld and process according to claim 2, characterized in that: The locking mechanism includes a threaded layer (10), which is sleeved on the outside of the circuit board (3). A threaded groove is provided on the outside of the threaded layer (10), and the threaded groove is adapted to the inside of the limiting sleeve (11).

4. A temperature and pressure integrated sensor that is easy to weld and process according to claim 3, characterized in that: A connecting spring (13) is installed at the bottom of the sealing ring (12), and the connecting springs (13) are distributed at equal angles at the bottom of the sealing ring (12).

5. A temperature and pressure integrated sensor that is easy to weld and process according to claim 4, characterized in that: The sealing ring (12) has a "J" shaped cross section and is symmetrical about the vertical central axis of the copper tube body (1).

6. A temperature and pressure integrated sensor that is easy to weld and process according to claim 5, characterized in that: The heat insulation mechanism includes a ceramic fiber sleeve (7), and the ceramic fiber sleeve (7) is sleeved on the outside of the copper tube body (1). A separation layer (8) is provided on the outside of the ceramic fiber sleeve (7), and a protective layer (9) is sleeved on the outside of the separation layer (8).

7. A temperature and pressure integrated sensor that is easy to weld and process according to claim 6, characterized in that: The cross-section of the separator layer (8) is semi-circular, and the separator layer (8) is distributed at equal angles on the outside of the ceramic fiber sleeve (7).

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