A conduit assembly structure for a pressure sensor

Abstract

This utility model discloses a conduit assembly structure for a pressure sensor, including a sensor housing, a pressure transmission channel inside the sensor housing, and a pressure-sensitive element installed at the end of the pressure transmission channel. A pressure measuring port is formed on the sensor housing by the pressure transmission channel, and a connecting ring is provided inside the pressure measuring port. A pressure transmission tube is threadedly connected to the connecting ring. A convex neck ring is formed on the outer wall of the pressure transmission tube, and a concave first groove is formed on the inner wall of the connecting ring. The first groove is deformable, allowing the neck ring to expand and be inserted into the first groove. After deformation recovery, the first groove covers and adheres tightly to the neck ring. A locking ring is provided outside the connecting ring, correspondingly fitted outside the first groove to suppress deformation of the first groove. This utility model facilitates the assembly and disassembly of the pressure transmission tube and improves the sealing performance between the pressure transmission tube and the pressure sensor.

Description

Technical Field

[0001] This utility model relates to the field of pressure sensor technology, and in particular to a conduit assembly structure for a pressure sensor. Background Technology

[0002] Pressure sensors monitor the refrigerant pressure within an air conditioning system. To accommodate welded piping in commercial air conditioning systems, a pressure transmission tube, typically made of copper, is added to the pressure sensor. This copper tube transmits the refrigerant to the sensing element of the pressure sensor. The copper tube and the pressure sensor are usually connected by welding or threading. Welding offers better sealing but makes disassembly and maintenance inconvenient. Threaded connections facilitate disassembly and maintenance but offer slightly poorer sealing. Therefore, the connection method between the copper tube and the pressure sensor has been optimized. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the shortcomings of the existing technology, this utility model provides a conduit assembly structure for a pressure sensor, which can not only facilitate the assembly and disassembly of the pressure transmission tube, but also improve the sealing between the pressure transmission tube and the pressure sensor.

[0004] Technical Solution: To achieve the above objectives, this utility model provides a pressure sensor conduit assembly structure, including a sensor housing, a pressure transmission channel inside the sensor housing, and a pressure-sensitive element installed at the end of the pressure transmission channel; the pressure transmission channel forms a pressure measuring port on the sensor housing, a connecting ring is provided inside the pressure measuring port, and a pressure transmission tube is threadedly connected to the connecting ring; a convex neck ring is formed on the outer wall of the pressure transmission tube, and a concave first clamping groove is formed on the inner wall of the connecting ring; the first clamping groove is deformable, the neck ring can be opened and squeezed into the first clamping groove, and the first clamping groove after deformation recovery covers and adheres tightly to the neck ring.

[0005] Furthermore, a locking ring is provided outside the connecting ring, and the locking ring is fitted onto the outside of the first clamping groove to suppress deformation of the first clamping groove.

[0006] Furthermore, the connecting ring has an external thread structure on its outer side, and the locking ring has an internal thread structure on its inner side. The locking ring is installed on the connecting ring through a threaded fit.

[0007] Furthermore, a clamping ring is connected to the locking ring, and a second clamping groove is provided on the clamping ring; when the locking ring is fitted outside the first clamping groove, the second clamping groove is opposite to the first clamping groove, and the first clamping groove and the second clamping groove cooperate to clamp the neck ring.

[0008] Furthermore, both ends of the pressure transmission tube are provided with neck rings; the locking ring and the clamping ring are connected separately, the inner diameter of the clamping ring is smaller than the outer diameter of the neck ring, the clamping ring is deformable, the clamping ring has a notch, and the clamping ring can be inserted between the two neck rings through the notch; the inner diameter of the locking ring is larger than the outer diameter of the neck ring, and the inner wall of the locking ring is provided with a stepped surface, and the locking ring can push the clamping ring through the stepped surface.

[0009] Furthermore, an inner ring groove is provided on the inner wall of the pressure transmission tube at a position corresponding to the neck ring; when the first clamping groove and the second clamping groove cooperate to clamp the neck ring, the neck ring is deformed by pressure and squeezes the inner ring groove.

[0010] Furthermore, when the first clamping groove and the second clamping groove cooperate to clamp the neck ring, the gap between the first clamping groove and the second clamping groove is separated.

[0011] Beneficial effects: The beneficial effects of the conduit assembly structure for the pressure sensor of this utility model are as follows:

[0012] 1) There is a connecting ring inside the pressure measuring port of the pressure sensor, and the pressure transmission tube is threaded into the connecting ring; there is a first clamping groove on the connecting ring, and there is a neck ring on the pressure transmission tube. The neck ring can be opened and squeezed into the first clamping groove. After the deformation is restored, the first clamping groove covers and adheres tightly to the neck ring, thereby improving the sealing between the pressure sensor and the pressure transmission tube.

[0013] 2) There is a locking ring outside the connecting ring. The locking ring can fit onto the first clamping groove to prevent the first clamping groove from deforming and keep the first clamping groove tightly attached to the neck ring.

[0014] 3) A clamping ring is connected to the locking ring, and the clamping ring has a second clamping groove; the neck ring itself is deformable, and the first clamping groove and the second clamping groove cooperate to clamp the neck ring, further improving the sealing between the pressure sensor and the pressure transmission tube. Attached Figure Description

[0015] Appendix Figure 1 This is a schematic diagram of the overall structure of the air conditioning pressure sensor of this utility model;

[0016] Appendix Figure 2 A schematic diagram showing the first and second clamping grooves clamping the neck ring;

[0017] Appendix Figure 3 This is a schematic diagram of the locking ring and clamping ring. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] As attached Figures 1 to 3The pressure sensor's conduit assembly structure includes a sensor housing 1, within which a pressure transmission channel 2 is provided. A pressure-sensitive element 3, which is a ceramic pressure core, is installed at the end of the pressure transmission channel 2. The pressure sensor also includes a connector 13 and a circuit board. A component cavity 14 is formed between the connector 13 and the sensor housing 1, and both the pressure-sensitive element 3 and the circuit board are installed within the component cavity 14. Furthermore, a shielding cover 15 is provided outside the pressure-sensitive element 3.

[0020] The pressure transmission channel 2 forms a pressure measuring port 4 on the sensor housing 1. A connecting ring 5 is installed inside the pressure measuring port 4 and is fixed inside the pressure measuring port 4 by welding. A pressure transmission tube 6 is internally threaded to the connecting ring 5, and an internal thread mechanism is provided on the inner wall of the connecting ring 5. The end of the pressure transmission tube 6 is provided with an external thread structure. The pressure transmission tube 6 is generally a copper tube. When the pressure sensor is used in an air conditioner, the other end of the pressure transmission tube 6 is connected to the air conditioner's refrigeration system, transmitting the refrigerant in the air conditioner to the pressure-sensitive element 3, so as to realize the monitoring of the air conditioner refrigerant pressure by the pressure sensor.

[0021] The pressure transmission tube 6 and the connecting ring 5 are connected by threads, making the pressure transmission tube 6 easy to install, disassemble, and maintain. However, the sealing performance between the pressure transmission tube 6 and the pressure sensor is slightly poor with only a threaded connection. To improve the sealing performance, in this invention, a convex neck ring 7 is formed on the outer wall of the pressure transmission tube 6, and a concave first groove 8 is formed on the inner wall of the connecting ring 5. The shape of the first groove 8 is adapted to the shape of the neck ring 7. The first groove 8 on the inner wall of the connecting ring 5 can deform. When the pressure transmission tube 6 is threaded into the connecting ring 5, the neck ring 7 can expand and squeeze into the first groove 8, and the deformed first groove 8 covers and adheres tightly to the neck ring 7. Through the tight fit between the first groove and the neck ring 7, the sealing performance between the pressure sensor and the pressure transmission tube 6 is improved.

[0022] A locking ring 9 is provided outside the connecting ring 5, and the locking ring 9 is fitted onto the outside of the first clamping groove 8. Since the locking ring 9 is fitted onto the first clamping groove 8, it can suppress the expansion deformation of the first clamping groove 8, so that the neck ring 7 and the first clamping groove 8 remain tightly fitted to each other. Specifically, an external thread structure is provided on the outside of the connecting ring 5, and an internal thread structure is provided inside the locking ring 9. The locking ring 9 is installed on the connecting ring 5 through threaded engagement, and its position on the connecting ring 5 can be changed by screwing on the locking ring 9.

[0023] In addition, a clamping ring 10 is connected to the locking ring 9, and the clamping ring 10 is provided with a second clamping groove 11. When the locking ring 9 is fitted over the first clamping groove 8, the second clamping groove 11 is opposite to the first clamping groove 8, and the first clamping groove 8 and the second clamping groove 11 are respectively located on both sides of the neck ring 7. As the locking ring 9 rotates on the connecting ring 5, the second clamping groove 11 will move closer to the first clamping groove 8, so that the first clamping groove 8 and the second clamping groove 11 cooperate to clamp the neck ring 7. As a result, the first clamping groove 8 and the neck ring 7 will fit together more tightly, further improving the sealing performance.

[0024] Both ends of the pressure transmission tube 6 are provided with neck rings 7. The locking ring 9 and the clamping ring 10 are connected separately. The inner diameter of the clamping ring 10 is smaller than the outer diameter of the neck ring 7, so the second clamping groove 11 on the clamping ring 10 can clamp the neck ring 7. However, this also prevents the clamping ring 10 from directly entering between the two neck rings 7. Therefore, as shown in the attached... Figure 3 As shown, a notch 17 is provided on the clamping ring 10, and the clamping ring 10 is deformable, allowing it to be fitted between the two neck rings 7 through the notch 17. The inner diameter of the locking ring 9 is larger than the outer diameter of the neck ring 7, so the locking ring 9 can be directly fitted between the two neck rings 7. A stepped surface 16 is provided on the inner wall of the locking ring 9, and the inner diameter of the stepped surface 16 is smaller than the outer diameter of the clamping ring 10, so the clamping ring 10 can rest on the stepped surface 16. In this way, when the locking ring 9 rotates on the connecting ring 5 through the threaded structure, the locking ring 9 can push the clamping ring 10 through the stepped surface 16, causing the second clamping groove 11 on the clamping ring 10 to clamp the neck ring 7, making the neck ring 7 fit tightly against the first clamping groove 8.

[0025] An inner annular groove 12 is provided on the inner wall of the pressure transmission tube 6 at a position corresponding to the neck ring 7, thus allowing the neck ring 7 to deform to a certain extent. When the first clamping groove 8 and the second clamping groove 11 clamp the neck ring 7, the neck ring 7 is compressed and deformed, squeezing the inner annular groove 12. Because the neck ring 7 can deform, the first clamping groove 8 and the neck ring 7 are more likely to adhere tightly to each other under compression. If there were no inner annular groove 12, that is, if the inner diameter of the pressure transmission tube 6 were uniform throughout, the neck ring 7 would not easily deform.

[0026] When the first clamping groove 8 and the second clamping groove 11 clamp the neck ring 7, the gap between the first clamping groove 8 and the second clamping groove 11 ensures that both the first clamping groove 8 and the second clamping groove 11 are tightly fitted to the neck ring 7. (See attached image) Figure 2 As shown, the cross-section of the neck ring 7 is semi-circular, the first clamping groove 8 is arc-shaped with a corresponding arc angle greater than 45 degrees, and the second clamping groove 11 is also arc-shaped with a corresponding arc angle less than 45 degrees.

[0027] In actual installation, the connecting ring 5 is first welded to the pressure measuring port 4 of the sensor housing 1. Then, the end of the pressure transmission tube 6 is screwed into the connecting ring 5 through a threaded connection, and the neck ring 7 is squeezed into the first clamping groove 8. Then, the clamping ring 10 and the locking ring 9 are put into the two neck rings 7. Then, the locking ring 9 is connected to the connecting ring 5 through a threaded connection. As the locking ring 9 is tightened on the connecting ring 5, the locking ring 9 will push the clamping ring 10 through the stepped surface 16, so that the second clamping groove 11 on the clamping ring 10 clamps the neck ring 7, so that the neck ring 7 and the first clamping groove 8 are tightly pressed together, thereby improving the sealing between the pressure transmission tube 6 and the pressure sensor.

[0028] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A conduit assembly structure for a pressure sensor, characterized in that: The sensor housing (1) includes a pressure transmission channel (2) inside the sensor housing (1) and a pressure-sensitive element (3) installed at the end of the pressure transmission channel (2). The pressure transmission channel (2) forms a pressure measuring port (4) on the sensor housing (1). A connecting ring (5) is provided inside the pressure measuring port (4). A pressure transmission tube (6) is threaded inside the connecting ring (5). A convex neck ring (7) is formed on the outer wall of the pressure transmission tube (6), and a concave first clamping groove (8) is formed on the inner wall of the connecting ring (5). The first clamping groove (8) is deformable, and the neck ring (7) can be opened and squeezed into the first clamping groove (8). After the deformation is restored, the first clamping groove (8) covers and adheres tightly to the neck ring (7).

2. The conduit assembly structure for a pressure sensor according to claim 1, characterized in that: A locking ring (9) is provided outside the connecting ring (5), and the locking ring (9) is fitted outside the first clamping groove (8) to suppress the deformation of the first clamping groove (8).

3. The conduit assembly structure for a pressure sensor according to claim 2, characterized in that: The connecting ring (5) is provided with an external thread structure, and the locking ring (9) is provided with an internal thread structure. The locking ring (9) is installed on the connecting ring (5) through threaded engagement.

4. The conduit assembly structure for a pressure sensor according to claim 2, characterized in that: The locking ring (9) is connected to a clamping ring (10), and the clamping ring (10) is provided with a second clamping groove (11). When the locking ring (9) is fitted outside the first clamping groove (8), the second clamping groove (11) is opposite to the first clamping groove (8), and the first clamping groove (8) and the second clamping groove (11) cooperate to clamp the neck ring (7).

5. The conduit assembly structure for a pressure sensor according to claim 4, characterized in that: Both ends of the pressure transmission tube (6) are provided with neck rings (7); the locking ring (9) and the clamping ring (10) are connected separately. The inner diameter of the clamping ring (10) is smaller than the outer diameter of the neck ring (7). The clamping ring (10) is deformable. There is a notch (17) on the clamping ring (10). The clamping ring (10) can be inserted between the two neck rings (7) through the notch (17); the inner diameter of the locking ring (9) is larger than the outer diameter of the neck ring (7). There is a stepped surface (16) on the inner wall of the locking ring (9). The locking ring (9) can push the clamping ring (10) through the stepped surface (16).

6. The conduit assembly structure of a pressure sensor according to claim 4, characterized in that: An inner ring groove (12) is provided on the inner wall of the pressure transmission tube (6) at the position corresponding to the neck ring (7); when the first clamping groove (8) and the second clamping groove (11) cooperate to clamp the neck ring (7), the neck ring (7) is deformed by pressure and squeezes the inner ring groove (12).

7. The conduit assembly structure for a pressure sensor according to claim 4, characterized in that: When the first clamping groove (8) and the second clamping groove (11) are used to clamp the neck ring (7), the gap between the first clamping groove (8) and the second clamping groove (11) is separated.

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