Oil-immersed pressure sensor

Abstract

The utility model relates to the technical field of pressure sensors, and discloses an oil-immersed pressure sensor, which comprises a detection shell, a mounting sleeve fixedly arranged at the front end of the detection shell, an oil storage bag part arranged in a cavity of the detection shell, a heat dissipation sleeve positioned on one side of the oil storage bag part, and a reinforcing baffle ring fixedly arranged on the outer wall of an opening of the oil storage bag part, the supporting baffle ring is fixedly arranged on the inner wall of the heat dissipation sleeve, the surface of the circuit board body is provided with a sensor body penetrating through a central hole of the supporting baffle ring, and the surfaces of the reinforcing baffle ring, the supporting baffle ring and the circuit board body are provided with screw holes distributed in an annular array mode. The oil storage bag part, the circuit board body and the supporting baffle ring are designed to be detachable, locking is completed through bolts during assembly, compared with a comparison file, follow-up supplement of an oil storage solution in the cavity of the oil storage bag part is facilitated, follow-up maintenance and replacement of equipment parts are facilitated, the detachable design is adopted, the use freedom degree is higher, and the service life is prolonged. And the sealing performance is high, and the application range is wider.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure sensors, in particular to an oil-immersed pressure sensor. Background Art

[0002] A pressure sensor is a device or apparatus that can sense pressure signals and convert them into usable output electrical signals according to certain rules. A pressure sensor usually consists of a pressure sensitive element, a device that converts the force or motion generated by the pressure sensitive element into electrical parameters, and a device that displays or records the electrical parameters.

[0003] Through patent search, it was found that an oil-immersed pressure sensor with publication number CN217155655U is provided with an annular plate, and the annular plate is clamped inside the sealing groove, and the oil storage bag is inserted into the detection groove, and then the interior of the oil storage bag is filled with liquid oil. Then the circuit board is clamped inside the sealing groove, and the sensor body is immersed in the liquid oil. In this way, errors caused by impurities in the air can be avoided, thereby achieving the purpose of improving accuracy. After the oil storage bag in the above-mentioned comparative document is combined with the circuit board, the circuit board and the annular plate are combined through spiral extrusion of the heat sink, so oil leakage is likely to occur during use. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides an oil-immersed pressure sensor, which solves the problems mentioned in the above background.

[0005] The utility model provides the following technical solutions:

[0006] It includes: a detection housing, a mounting kit fixed at the front end of the detection housing, an oil storage bag installed in the cavity of the detection housing, and a heat dissipation sleeve located at one side of the oil storage bag.

[0007] Also includes:

[0008] The reinforcement retaining ring is fixedly arranged on the outer wall of the opening of the oil storage bag;

[0009] The support baffle ring is fixedly arranged on the inner wall of the heat dissipation sleeve, and an opening is provided at the center of the support baffle ring;

[0010] The circuit board body is attached to the end face of the support retaining ring away from the reinforcement retaining ring. The surface of the circuit board body is installed with a sensor body passing through the central opening of the support retaining ring. The surfaces of the reinforcement retaining ring, the support retaining ring and the circuit board body are provided with screw holes distributed in a circular array.

[0011] Furthermore, a twisting block is fixedly provided on the outer wall of the detection housing near the end of the installation kit, and a sealing gasket is filled between the installation kit and the twisting block.

[0012] Furthermore, a detection retaining cylinder is fixedly arranged in the cavity of the detection shell, and a detection inner cavity is opened inside the detection retaining cylinder. The detection inner cavity is communicated with the cavity of the detection shell and the installation kit.

[0013] Furthermore, the diameter of the oil storage bag portion is adapted to the inner diameter of the detection inner cavity, and one end of the reinforcement retaining ring is in contact with the surface port surface of the detection retaining cylinder.

[0014] Furthermore, a positioning ring groove is provided on the end face of the reinforcement retaining ring away from the oil storage bag portion, and the other end of the reinforcement retaining ring is fitted with the surface of the support retaining ring, and a sealing ring gasket is fixed on the surface of the support retaining ring and extends into the positioning ring groove.

[0015] Furthermore, the sensor body extends into the cavity of the oil storage bag through the opening of the support retaining ring, one end of the sensor body passes through the circuit board body and is connected to a wire tube, and a plug head is provided on the outside of the wire tube.

[0016] Furthermore, the inner wall of the detection shell is provided with an internal thread portion, and the outer wall of the heat dissipation sleeve is provided with an external thread matched with the internal thread portion.

[0017] Furthermore, a plug head is provided on the outer sleeve of the wire tube, a synchronization socket is provided on the end of the support retaining ring, and a plug rod connected to the synchronization socket is fixed on the end surface of the plug head close to the heat dissipation sleeve.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] In this application, the oil storage bag, circuit board body and support baffle ring are designed to be detachable, and are locked by bolts during assembly. Compared with the comparative documents, this facilitates the subsequent replenishment of the oil storage solution in the oil storage bag cavity, and also facilitates the subsequent maintenance and replacement of equipment parts. The detachable design has a higher degree of freedom in use, has stronger sealing performance, and has a wider range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the utility model;

[0021] Figure 2 It is a side view of the utility model;

[0022] Figure 3 This is a split cross-sectional view of the utility model;

[0023] Figure 4 This is an enlarged view of the reinforced retaining ring of the utility model.

[0024] In the figure: 1. detection housing; 2. twisting block; 3. installation kit; 4. detection inner cavity; 5. detection retaining cylinder; 6. internal threaded part; 7. oil storage bag part; 8. reinforcement retaining ring; 9. heat dissipation sleeve; 10. support retaining ring; 11. positioning ring groove; 12. sealing ring gasket; 13. circuit board body; 14. sensor body; 15. plug head; 16. wire tube; 17. synchronization jack. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1-4 , including: a detection shell 1, an installation kit 3 fixed at the front end of the detection shell 1, an oil storage bag part 7 installed in the cavity of the detection shell 1, and a heat dissipation sleeve 9 located on one side of the oil storage bag part 7. A torsion block 2 is fixed on the outer wall of the detection shell 1 near the end of the installation kit 3, and a sealing gasket is filled between the installation kit 3 and the torsion block 2. The outer wall of the installation kit 3 has an external thread for pressure testing of external equipment, and a channel connected to the cavity of the detection shell 1 is opened inside the installation kit 3, so that the medium can enter the detection shell 1 along the channel in the installation kit 3.

[0027] The reinforcement retaining ring 8 is fixedly arranged on the opening outer wall of the oil storage bag part 7, and the diameter of the reinforcement retaining ring 8 is larger than the outer diameter of the oil storage bag part 7. A detection retaining cylinder 5 is fixedly arranged in the cavity of the detection shell 1, and the internal cavity of the detection shell 1 is divided into two groups by the detection retaining cylinder 5, and a detection inner cavity 4 is opened in the cavity of the detection retaining cylinder 5, so that the detection inner cavity 4 is connected with the channel of the installation kit 3 and the detection shell 1. When assembling the oil storage bag part 7 and the reinforcement retaining ring 8, the end face of the reinforcement retaining ring 8 is tightly attached to the end of the detection retaining cylinder 5, and the oil storage bag part 7 is extended into the detection inner cavity 4. A sealing gasket can be filled in the contact part between the end of the detection retaining cylinder 5 and the reinforcement retaining ring 8;

[0028] The support retaining ring 10 is fixedly arranged on the inner wall of the heat dissipation sleeve 9, and an opening is provided in the center of the support retaining ring 10. During assembly, the heat dissipation sleeve 9 is placed in the cavity of the detection housing 1, and the two ends of the reinforcement retaining ring 8 are respectively fitted with the end of the support retaining ring 10 and the detection retaining cylinder 5 to clamp and seal the detection retaining cylinder 5. In order to further improve the sealing effect, a positioning ring groove 11 of an annular structure is provided on the surface of the reinforcement retaining ring 8, and a sealing ring gasket 12 extending into the positioning ring groove 11 is fixedly arranged on the surface of the support retaining ring 10. When the reinforcement retaining ring 8 is combined with the support retaining ring 10, a strong sealing effect is achieved. Sealing, the circuit board body 13 is attached to the end face of the supporting retaining ring 10 away from the reinforcing retaining ring 8, and the surface of the circuit board body 13 is installed with a sensor body 14 passing through the central opening of the supporting retaining ring 10, and the surfaces of the reinforcing retaining ring 8, the supporting retaining ring 10 and the circuit board body 13 are provided with screw holes distributed in a circular array. During assembly, the openings of the reinforcing retaining ring 8, the supporting retaining ring 10 and the circuit board body 13 are aligned, and then the bolts are inserted in turn to complete the fixation of the positions of the three. In order to improve the sealing of the periphery of the sensor body 14, a sealing gasket can be filled on the contact surface between the circuit board body 13 and the supporting retaining ring 10.

[0029] The sensor body 14 extends through the opening of the support baffle 10 into the cavity of the oil storage bag 7 . One end of the sensor body 14 passes through the circuit board body 13 and is connected to a wire tube 16 . The outer portion of the wire tube 16 is sleeved with a plug head 15 . The inner wall of the detection shell 1 is provided with an internal threaded portion 6, and the outer wall of the heat dissipation sleeve 9 is provided with an external thread adapted to the internal threaded portion 6. A plug head 15 is provided on the outside of the wire threading tube 16, and a synchronization socket 17 is provided at the end of the support retaining ring 10. A plug rod connected to the synchronization socket 17 is fixed to the end face of the plug head 15 close to the heat dissipation sleeve 9. During assembly, the heat dissipation sleeve 9 is screwed into the cavity of the detection shell 1 by utilizing the threaded connection between the external thread of the heat dissipation sleeve 9 and the internal threaded portion 6, and finally the reinforcement retaining ring 8 and the front end of the heat dissipation sleeve 9 are abutted against the end of the detection retaining tube 5. Finally, in order to facilitate the spiral operation of the heat dissipation sleeve 9, a plug head 15 is provided on one side of the heat dissipation sleeve 9, so that the plug rod at the front of the plug head 15 can be inserted into the groove of the synchronization socket 17, so that the plug head 15 can rotate synchronously with the heat dissipation sleeve 9, thereby facilitating the spiral combination of the heat dissipation sleeve 9 and the plug head 15 with the internal threaded portion 6, and facilitating the disassembly and assembly work.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An oil-immersed pressure sensor, comprising: A detection housing (1), a mounting kit (3) fixedly mounted at the front end of the detection housing (1), an oil storage bag (7) mounted in the cavity of the detection housing (1), and a heat dissipation sleeve (9) located at one side of the oil storage bag (7). It is characterized by further comprising: A reinforcing baffle ring (8) is fixedly mounted on the outer wall of the opening of the oil storage bag portion (7); A support baffle ring (10) is fixedly mounted on the inner wall of the heat dissipation sleeve (9), and an opening is formed at the center of the support baffle ring (10); The circuit board body (13) is fitted on the end surface of the support baffle ring (10) away from the reinforcement baffle ring (8), and a sensor body (14) passing through the central opening of the support baffle ring (10) is installed on the surface of the circuit board body (13). The surfaces of the reinforcement baffle ring (8), the support baffle ring (10) and the circuit board body (13) are provided with screw holes distributed in a circular array.

2. The oil-immersed pressure sensor according to claim 1, characterized in that: A twisting block (2) is fixedly provided on the outer wall of the detection housing (1) close to the end of the installation kit (3), and a sealing gasket is filled between the installation kit (3) and the twisting block (2).

3. The oil-immersed pressure sensor according to claim 1, characterized in that: A detection retaining cylinder (5) is fixedly arranged in the cavity of the detection housing (1), and a detection inner cavity (4) is provided inside the detection retaining cylinder (5). The detection inner cavity (4) is communicated with the cavity of the detection housing (1) and the installation kit (3).

4. The oil-immersed pressure sensor according to claim 1, characterized in that: The diameter of the oil storage bag portion (7) is adapted to the inner diameter of the detection inner cavity (4), and one end of the reinforcement retaining ring (8) is fitted to the surface port surface of the detection retaining cylinder (5).

5. The oil-immersed pressure sensor according to claim 1, characterized in that: A positioning ring groove (11) is provided on the end surface of the reinforcing retaining ring (8) away from the oil storage bag portion (7), and the other end of the reinforcing retaining ring (8) is in contact with the surface of the supporting retaining ring (10). A sealing ring gasket (12) is fixed on the surface of the supporting retaining ring (10) and extends into the positioning ring groove (11).

6. The oil-immersed pressure sensor according to claim 1, characterized in that: The sensor body (14) passes through the opening of the support baffle ring (10) and extends into the cavity of the oil storage bag (7). One end of the sensor body (14) passes through the circuit board body (13) and is connected to a wire tube (16). The outer portion of the wire tube (16) is provided with a plug head (15).

7. The oil-immersed pressure sensor according to claim 1, characterized in that: The inner wall of the detection housing (1) is provided with an internal thread portion (6), and the outer wall of the heat dissipation sleeve (9) is provided with an external thread matching the internal thread portion (6).

8. The oil-immersed pressure sensor according to claim 1, characterized in that: The outer sleeve of the wire threading tube (16) is provided with a plug head (15), the end of the supporting retaining ring (10) is provided with a synchronous plug hole (17), and the end surface of the plug head (15) close to the heat dissipation sleeve (9) is fixed with a plug rod plugged into the synchronous plug hole (17).

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