Seal assembly for pressure transmitter

Abstract

The utility model discloses a sealing assembly for pressure transmitter, including main valve block, be equipped with first chamber and second chamber in main valve block, be equipped with pressure difference sensor between first chamber and second chamber, be equipped with pressure -proof water -tight terminal block assembly in second chamber, be equipped with pressure -tight sleeve between pressure -proof water -tight terminal block assembly and pressure difference sensor, the opening end of second chamber is equipped with the pressure block of being adjacent to the pressure -proof water -tight terminal block assembly arrangement, the outside surface of pressure block is installed with circuit board, and one end electric connection of circuit board and pressure -proof water -tight terminal block assembly, the other end electric connection pressure difference sensor of pressure -proof water -tight terminal block assembly, the bottom end surface of main valve block is equipped with with fixed connection's adapter plate, the utility model discloses pressure -proof water -tight terminal block assembly integrated setting, and install in main valve block has good seal, and good versatility and use temperature reliable.

Description

Technical Field

[0001] This utility model belongs to the field of sealing technology, and specifically relates to a sealing component for a pressure transmitter. Background Technology

[0002] Sealed terminal blocks are typically used for connecting electronic components and circuit boards within a cavity. Both the electronic components and the sealed terminal block are installed inside the cavity, while the circuit board is installed outside the cavity. This allows for electrical connection between the electronic components and the circuit board via the sealed terminal block. A patent with publication number CN220106924U discloses a sealed terminal block, including an upper wiring mechanism and a lower wiring mechanism. This utility model proposes a sealed terminal block that achieves easy disassembly and sealing. The device moves a blocking block to one side, causing the housing to embed into the upper surface of the inner box. When the housing reaches a designated position, a fixed tension spring pushes a fixed connecting block, causing the fixed blocking block to embed into a second groove, stabilizing it and facilitating installation. A sealing ring is pressed against the outer surface of the housing, achieving a seal. For disassembly, a fixed pushing block moves a moving rod through a through-hole, causing one end of the moving rod to push the blocking block towards the inner wall of the first groove, disengaging the upper wiring mechanism from the lower wiring mechanism and facilitating disassembly. Existing sealed terminal blocks are assembled from multiple components, resulting in poor overall sealing and the possibility of liquid leakage during wiring, which can damage the circuit board. Furthermore, existing sealed terminal blocks have a large overall structure, limiting installation dimensions and versatility. Summary of the Invention

[0003] This invention addresses the problems existing in the prior art by designing a sealing assembly for pressure transmitters. The pressure-resistant and watertight terminal block assembly of this invention is integrally molded and installed inside the main valve block, providing good sealing performance, good versatility, and reliable operating temperature.

[0004] The objective of this invention is achieved through the following technical solution: a sealing assembly for a pressure transmitter, comprising a main valve block, a first chamber and a second chamber within the main valve block, a differential pressure sensor being disposed between the first chamber and the second chamber; a pressure-resistant watertight connector assembly is disposed within the second chamber, a clamping sleeve being disposed between the pressure-resistant watertight connector assembly and the differential pressure sensor; a pressure block is disposed adjacent to the pressure-resistant watertight connector assembly at the open end of the second chamber, a circuit board is mounted on the outer side of the pressure block, one end of the circuit board is electrically connected to the pressure-resistant watertight connector assembly, and the other end of the pressure-resistant watertight connector assembly is electrically connected to the differential pressure sensor; an adapter plate is fixedly connected to the bottom end face of the main valve block.

[0005] Preferably, the pressure-resistant watertight connector assembly includes a main base, and a plurality of evenly distributed insulating glass blanks are provided inside the main base. Each insulating glass blank is sealed and inserted with a metal lead wire. The main base, the insulating glass blanks and the metal lead wires are all integrally formed. One end of the main base is adjacent to the clamping sleeve, and the other end of the main base is adjacent to the pressure block. The clamping sleeve is adjacent to the differential pressure sensor.

[0006] Preferably, the main body base is disposed in the second chamber of the main valve block, and the main valve block is provided with an annular groove; the annular groove is provided with a first sealing ring and an annular retaining ring arranged side by side and adjacent to each other, and the first sealing ring and the annular retaining ring are both sleeved and installed on the outer layer of the main body base; the outer contour of the first sealing ring is adapted to the outer contour of the annular groove.

[0007] Preferably, one end of the metal lead is electrically connected to the differential pressure sensor, and the other end of the metal lead is electrically connected to the circuit board; the end of the metal lead is provided with a solder joint.

[0008] Preferably, the pressure resistance of the pressure-resistant watertight connector assembly is greater than 100 MPa, the main base is cylindrical, and the outer diameter of the main base is between 9 mm and 10 mm.

[0009] Preferably, the insulation resistance of the insulating glass blank is greater than 500MΩ.

[0010] The main base, insulating glass blank, and metal leads of the pressure-resistant watertight connector assembly are all integrally molded, resulting in higher overall structural strength and better sealing performance. The main base and main valve block are sealed by a first sealing ring, which is further limited by an annular retaining ring, enhancing the sealing effect. The metal leads on the pressure-resistant watertight connector assembly are electrically connected to the differential pressure sensor via wires (standard components not shown in the accompanying drawings). The ends of the metal leads have welding joints for easy welding of the wires to each other. The pressure resistance of the pressure-resistant watertight connector assembly is greater than 100 MPa, enabling it to withstand high-pressure environments in the deep sea. The outer diameter of the main base ranges from 9 mm to 10 mm, making the overall size of the pressure-resistant watertight connector assembly more compact, easier to install, and more versatile. The insulating glass blank has an insulation resistance greater than 500 MΩ, providing excellent overall insulation.

[0011] Preferably, the pressure block has an annular protrusion, and the main valve block has a limiting groove; the outer contour of the annular protrusion matches the outer contour of the limiting groove, and the pressure-resistant watertight connector assembly includes a main body base; when the annular protrusion is installed in the limiting groove, the end face of the annular protrusion fits against the main body base; a circuit board is fixedly installed on the outer side of the pressure block, and the circuit board is located outside the second chamber; a cover plate is fixedly installed on the side of the main valve block, and the cover plate is adjacent to the circuit board.

[0012] Preferably, the end face of the adapter plate is sealed to the end face of the main valve block; the adapter plate is provided with a first inlet / outlet channel and a second inlet / outlet channel, the first inlet / outlet channel is connected to the first chamber, and the second inlet / outlet channel is connected to the second chamber.

[0013] Preferably, a second sealing ring for sealing is provided between the differential pressure sensor and the inner wall of the second chamber; the clamping sleeve is provided with a flow channel hole through which its second chamber is connected.

[0014] The pressure block and clamping sleeve work together to axially position the pressure-resistant watertight connector assembly, ensuring a more stable and reliable assembly between the assembly and the main valve block. The circuit board is mounted on the outer side of the pressure block, facilitating soldering to the metal leads on the pressure-resistant watertight connector assembly; a cover plate protects the circuit board. An adapter plate allows for easy connection and installation of external hydraulic output components. A second sealing ring ensures the independence of the first and second chambers, enabling the differential pressure sensor to stably measure the pressure difference between them. A flow channel allows hydraulic oil to flow smoothly from the second chamber into the clamping sleeve, and then from the clamping sleeve to the differential pressure sensor.

[0015] Compared with the prior art, the present invention has the following advantages: 1. The pressure-resistant watertight junction box assembly is integrally molded, which makes the structure more stable and the sealing effect better; 2. The main base of the pressure-resistant watertight junction box assembly is small in size, easy to install and has a wide range of applications; 3. In the second chamber of the main valve block, the differential pressure sensor and the circuit board can be electrically connected by metal leads, avoiding external installation of wires, making the structure more compact and the insulation effect better. Attached Figure Description

[0016] Figure 1 This is a perspective view of the present utility model; Figure 2 This is a schematic diagram of the internal structure of the present invention; Figure 3 for Figure 2 A magnified view of a portion of position A in the diagram; Figure 4A perspective view of the pressure-resistant watertight junction box assembly; The markings in the diagram are as follows: 1. Main valve block; 2. First chamber; 3. Second chamber; 4. Differential pressure sensor; 5. Pressure-resistant watertight terminal assembly; 51. Main base; 52. Insulating glass blank; 53. Metal lead wire; 54. Weld joint; 6. Clamping sleeve; 7. Clamping block; 8. Circuit board; 9. Adapter plate; 10. Annular groove; 11. First sealing ring; 12. Annular retaining ring; 13. Annular protrusion; 14. Limiting groove; 15. Cover plate; 16. First inlet / outlet channel; 17. Second inlet / outlet channel; 18. Second sealing ring; 19. Flow channel hole. Detailed Implementation

[0017] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings: like Figures 1 to 4 As shown, this embodiment discloses a sealing assembly for a pressure transmitter, including a main valve block 1. The main valve block 1 has a first chamber 2 and a second chamber 3, and a differential pressure sensor 4 is provided between the first chamber 2 and the second chamber 3. The second chamber 3 has a pressure-resistant watertight connector assembly 5, and a clamping sleeve 6 is provided between the pressure-resistant watertight connector assembly 5 and the differential pressure sensor 4. The opening end of the second chamber 3 has a pressure block 7 adjacent to the pressure-resistant watertight connector assembly 5. A circuit board 8 is mounted on the outer side of the pressure block 7. The circuit board 8 is electrically connected to one end of the pressure-resistant watertight connector assembly 5, and the other end of the pressure-resistant watertight connector assembly 5 is electrically connected to the differential pressure sensor 4. The bottom end face of the main valve block 1 has an adapter plate 9 fixedly connected to it.

[0018] The pressure-resistant watertight connector assembly 5 includes a main base 51, within which are arranged a plurality of evenly distributed insulating glass blanks 52. Each insulating glass blank 52 contains a metal lead wire 53 sealed and inserted. The main base 51, the insulating glass blanks 52, and the metal lead wires 53 are all integrally formed. One end of the main base 51 is adjacent to a clamping sleeve 6, and the other end is adjacent to a pressure block 7. The clamping sleeve 6 is adjacent to a differential pressure sensor 4. The main base 51 is disposed within the second chamber 3 of the main valve block 1. The main valve block 1 has an annular groove 10. The annular groove 10 contains a first sealing ring 11 and an annular retaining ring 12 arranged side by side and adjacent to each other. The first sealing ring 11 and the annular retaining ring 12 are both fitted onto the outer layer of the main base 51. The outer contour of the first sealing ring 11 is adapted to the outer contour of the annular groove 10. One end of the metal lead 53 is electrically connected to the differential pressure sensor 4, and the other end of the metal lead 53 is electrically connected to the circuit board 8; the end of the metal lead 53 is provided with a solder joint 54. The pressure-resistant watertight connector assembly 5 has a pressure resistance greater than 100 MPa, and the main base 51 is cylindrical, with an outer diameter ranging from 9 mm to 10 mm. The insulation resistance of the insulating glass blank 52 is greater than 500 MΩ.

[0019] The pressure block 7 has an annular protrusion 13, and the main valve block 1 has a limiting groove 14 inside. The outer contour of the annular protrusion 13 is adapted to the outer contour of the limiting groove 14. The pressure-resistant watertight connector assembly 5 includes a main body base 51. When the annular protrusion 13 is installed in the limiting groove 14, the end face of the annular protrusion 13 is fitted with the main body base 51. A circuit board 8 is fixedly installed on the outer side of the pressure block 7, and the circuit board 8 is located outside the second chamber 3. A cover plate 15 is fixedly installed on the side of the main valve block 1, and the cover plate 15 is adjacent to the circuit board 8. The end face of the adapter plate 9 is sealed to the end face of the main valve block 1. The adapter plate 9 has a first inlet / outlet channel 16 and a second inlet / outlet channel 17. The first inlet / outlet channel 16 is connected to the first chamber 2, and the second inlet / outlet channel 17 is connected to the second chamber 3. A second sealing ring 18 is provided between the differential pressure sensor 4 and the inner wall of the second chamber 3 for sealing; the clamping sleeve 6 is provided with a flow channel hole 19 that communicates with the second chamber 3.

[0020] The specific operation process of this embodiment is as follows: The main body base 51, insulating glass blank 52, and metal lead wire 53 on the pressure-resistant watertight connector assembly 5 are all integrally formed, resulting in higher overall structural strength and better sealing effect. The main body base 51 is sealed to the main valve block 1 by a first sealing ring 11, and the first sealing ring 11 is limited by an annular retaining ring 12, further improving the sealing effect. The metal lead wire 53 on the pressure-resistant watertight connector assembly 5 is electrically connected to the differential pressure sensor 4 via a wire. Here, the wire is an existing standard part and is not shown in the accompanying drawings. The end of the metal lead wire 53 is provided with a welding port 54, which facilitates welding the wire and the metal lead wire 53 together. The pressure resistance of the pressure-resistant watertight connector assembly 5 is greater than 100 MPa, which can adapt to the high-pressure environment of the deep sea. The outer diameter of the main body base 51 is between 9 mm and 10 mm, making the overall size of the pressure-resistant watertight connector assembly 5 more compact, easy to install, and versatile. The insulation resistance of the insulating glass blank 52 is greater than 500 MΩ, resulting in good overall insulation effect.

[0021] The pressure block 7 and the clamping sleeve 6 cooperate to axially position the pressure-resistant watertight connector assembly 5, making the assembly of the pressure-resistant watertight connector assembly 5 and the main valve block 1 more stable and reliable. The circuit board 8 is mounted on the outer side of the pressure block 7, facilitating welding between the circuit board 8 and the metal leads 53 on the pressure-resistant watertight connector assembly 5; the cover plate 15 provides protection for the circuit board 8. The adapter plate 9 facilitates the external installation of hydraulic output components; the second sealing ring 18 ensures the independence of the first chamber 2 and the second chamber 3, allowing the differential pressure sensor 4 to stably measure the pressure difference between the first chamber 2 and the second chamber 3. The flow channel hole 19 allows hydraulic oil to flow smoothly from the second chamber 3 into the clamping sleeve 6, and then from the clamping sleeve 6 to the differential pressure sensor 4.

[0022] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A sealing assembly for a pressure transmitter, comprising a main valve block (1), characterized in that, The main valve block (1) is provided with a first chamber (2) and a second chamber (3), and a differential pressure sensor (4) is provided between the first chamber (2) and the second chamber (3); a pressure-resistant watertight connector assembly (5) is provided in the second chamber (3), and a clamping sleeve (6) is provided between the pressure-resistant watertight connector assembly (5) and the differential pressure sensor (4); a pressure block (7) is provided at the opening end of the second chamber (3) adjacent to the pressure-resistant watertight connector assembly (5), and a circuit board (8) is installed on the outer side of the pressure block (7). The circuit board (8) is electrically connected to one end of the pressure-resistant watertight connector assembly (5), and the other end of the pressure-resistant watertight connector assembly (5) is electrically connected to the differential pressure sensor (4); an adapter plate (9) is provided on the bottom end face of the main valve block (1) and is fixedly connected thereto.

2. The sealing assembly for a pressure transmitter according to claim 1, characterized in that, The pressure-resistant watertight connector assembly (5) includes a main base (51), and a number of evenly distributed insulating glass blanks (52) are provided inside the main base (51). Each insulating glass blank (52) is sealed with a metal lead wire (53). The main base (51), the insulating glass blanks (52) and the metal lead wire (53) are all integrally formed. One end of the main base (51) is adjacent to the clamping sleeve (6), and the other end of the main base (51) is adjacent to the pressure block (7). The clamping sleeve (6) is adjacent to the differential pressure sensor (4).

3. The sealing assembly for a pressure transmitter according to claim 2, characterized in that, The main body base (51) is located in the second chamber (3) of the main valve block (1), and the main valve block (1) is provided with an annular groove (10); the annular groove (10) is provided with a first sealing ring (11) and an annular retaining ring (12) arranged side by side and adjacent to each other, and the first sealing ring (11) and the annular retaining ring (12) are both sleeved and installed on the outer layer of the main body base (51); the outer contour of the first sealing ring (11) is adapted to the outer contour of the annular groove (10).

4. The sealing assembly for a pressure transmitter according to claim 2, characterized in that, One end of the metal lead (53) is electrically connected to the differential pressure sensor (4), and the other end of the metal lead (53) is electrically connected to the circuit board (8); the end of the metal lead (53) is provided with a solder joint (54).

5. The sealing assembly for a pressure transmitter according to claim 2, characterized in that, The pressure resistance of the pressure-resistant watertight connector assembly (5) is greater than 100 MPa, the main base (51) is cylindrical, and the outer diameter of the main base (51) is between 9 mm and 10 mm.

6. The sealing assembly for a pressure transmitter according to claim 2, characterized in that, The insulation resistance of the insulating glass blank (52) is greater than 500MΩ.

7. The sealing assembly for a pressure transmitter according to claim 1, characterized in that, The pressure block (7) is provided with an annular protrusion (13), and the main valve block (1) is provided with a limiting groove (14); the outer contour of the annular protrusion (13) and the outer contour of the limiting groove (14) are adapted to each other, and the pressure-resistant watertight connector assembly (5) includes a main body base (51); when the annular protrusion (13) is installed in the limiting groove (14), the end face of the annular protrusion (13) is fitted with the main body base (51); a circuit board (8) is fixedly installed on the outer side of the pressure block (7), and the circuit board (8) is located on the outside of the second chamber (3); a cover plate (15) is fixedly installed on the side of the main valve block (1), and the cover plate (15) is adjacent to the circuit board (8).

8. The sealing assembly for a pressure transmitter according to claim 1, characterized in that, The end face of the adapter plate (9) is sealed to the end face of the main valve block (1); the adapter plate (9) is provided with a first inlet / outlet channel (16) and a second inlet / outlet channel (17), the first inlet / outlet channel (16) is connected to the first chamber (2), and the second inlet / outlet channel (17) is connected to the second chamber (3).

9. The sealing assembly for a pressure transmitter according to claim 1, characterized in that, A second sealing ring (18) for sealing is provided between the differential pressure sensor (4) and the inner wall of the second chamber (3); a flow channel hole (19) communicating with the second chamber (3) is provided in the clamping sleeve (6).

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