Pressure sensor waterproof structure

Abstract

The utility model discloses a pressure sensor waterproof structure, including pressure sensor casing, pressure sensor casing one end is installed cable, and the cable is installed with the protection glue tower close to pressure sensor casing end, and the protection glue tower outside is provided with sealant, and the sealant outside is covered with main heat shrink sleeve, and one end of main heat shrink sleeve is pasted with the one side of baffle ring, and the baffle ring is fixed on the outside wall of pressure sensor casing, and the outside wall of pressure sensor casing of baffle ring one side is provided with the convex ring, and the convex ring is pasted with one end of main heat shrink sleeve inside face, and the other end of main heat shrink sleeve outside is covered with auxiliary heat shrink sleeve. This pressure sensor waterproof structure adopts novel structure design, not only can carry out multilayer sealing protection to cable and pressure sensor casing connecting place, effectively avoid the water vapor from the gap into pressure sensor casing, and can carry out stable protection to the cable of connecting place, avoid the cable abrasion.

Description

Technical Field

[0001] This utility model relates to the field of pressure sensor technology, specifically a waterproof structure for a pressure sensor. Background Technology

[0002] Waterproof pressure sensor structures are a series of specialized designs and methods whose core purpose is to prevent external liquid pressure from entering the sensor while ensuring that the sensor can accurately sense external liquid pressure. This protects the sensor's delicate electronic components from damage and corrosion, and ensures long-term stability and reliability of measurements.

[0003] Existing pressure sensors completely encapsulate electronic components by filling the sensor's circuit board and housing with epoxy resin or silicone, isolating them from moisture. Rubber O-rings are used at the sensor's housing joints and threaded interfaces to effectively seal and waterproof the internal components. However, the connection between the cable and the pressure sensor housing lacks sealing and protection mechanisms, allowing moisture to easily enter the pressure sensor housing through gaps, and the cable is also prone to wear. To address these issues, innovative designs based on existing pressure sensors are urgently needed. Utility Model Content

[0004] The purpose of this invention is to provide a waterproof structure for a pressure sensor, in order to solve the problems mentioned in the background art, such as the lack of sealing and protection mechanisms at the connection between the cable and the pressure sensor housing of existing pressure sensors, which allows moisture to easily enter the pressure sensor housing through gaps and makes the cable prone to wear.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a waterproof pressure sensor structure, comprising a pressure sensor housing, a cable installed at one end of the pressure sensor housing, a protective rubber tower installed at the end of the cable near the pressure sensor housing, a sealant provided on the outside of the protective rubber tower, a main heat shrink sleeve covering the outside of the sealant, one end of the main heat shrink sleeve fitting against one side of a retaining ring, the retaining ring being fixed to the outer wall of the pressure sensor housing, a protruding ring provided on the outer wall of the pressure sensor housing on one side of the retaining ring, the protruding ring fitting against the inner side of one end of the main heat shrink sleeve, a secondary heat shrink sleeve covering the outer side of the other end of the main heat shrink sleeve, an inner sealing ring fitted on the cable fitted against the other end of the main heat shrink sleeve, and a cable tie installed on the secondary heat shrink sleeve.

[0006] Preferably, a positioning rubber ring is provided on the outer side of the cable near the pressure sensor housing, the positioning rubber ring is in contact with the inner wall of the positioning groove, and the positioning groove is formed on the inner wall of the protective rubber tower.

[0007] Preferably, the positioning grooves are evenly distributed on the inner wall of the protective adhesive tower, the protective adhesive tower is configured as a frustum, and the material of the protective adhesive tower is rubber.

[0008] Preferably, a side sealing groove is provided at the contact point between the protective rubber tower and the end face of the pressure sensor housing, the inner wall of the side sealing groove is in contact with the side sealing ring, and the side sealing ring is fixed to the end face of the pressure sensor housing.

[0009] Preferably, the convex ring and the pressure sensor housing are integrally formed, the convex rings are evenly spaced, and the surface of the convex ring is set with a frosted finish.

[0010] Preferably, the frontal width of the cable tie is greater than half the frontal length of the portion of the secondary heat shrink sleeve that is attached to the end of the primary heat shrink sleeve, and the length of the portion of the secondary heat shrink sleeve that is attached to the end of the primary heat shrink sleeve is greater than 1 / 3 of the overall length of the secondary heat shrink sleeve.

[0011] Compared with the prior art, the beneficial effects of this utility model are: the waterproof structure of the pressure sensor adopts a novel structural design, which can not only provide multi-layer sealing protection for the connection between the cable and the pressure sensor housing, effectively preventing moisture from entering the pressure sensor housing from the gaps, but also provide stable protection for the cable at the connection point, preventing cable wear.

[0012] 1. The protective rubber tower is locked in position by positioning rubber rings and positioning grooves to prevent it from sliding or shifting on the cable. The end face of the protective rubber tower and the end face of the pressure sensor housing are sealed by side sealing grooves and side sealing rings. Combined with the sealant covering the outside, the connection between the cable and the pressure sensor housing is waterproof.

[0013] 2. The retaining ring is used to seal one end of the main heat shrink sleeve, and the convex ring fits tightly against the inner side of one end of the main heat shrink sleeve to increase friction and prevent one end of the main heat shrink sleeve from loosening. The other end of the main heat shrink sleeve is sealed and positioned by the auxiliary heat shrink sleeve, inner sealing ring and cable tie to prevent the other end of the main heat shrink sleeve from loosening, further improving the waterproof effect at the connection between the cable and the pressure sensor housing. Attached Figure Description

[0014] Figure 1 This is a front view structural diagram of the present invention;

[0015] Figure 2 This is a frontal cross-sectional view of the present invention.

[0016] Figure 3 This is a side view of the protective adhesive tower structure of this utility model;

[0017] Figure 4 This is a schematic diagram of the three-dimensional structure of the protective adhesive tower of this utility model.

[0018] In the diagram: 1. Pressure sensor housing; 2. Cable; 3. Positioning rubber ring; 4. Positioning groove; 5. Protective rubber tower; 6. Side sealing groove; 7. Side sealing ring; 8. Sealant; 9. Main heat shrink sleeve; 10. Retaining ring; 11. Convex ring; 12. Secondary heat shrink sleeve; 13. Inner sealing ring; 14. Cable tie. Detailed Implementation

[0019] 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.

[0020] Please see Figures 1-4 This utility model provides a technical solution: a waterproof structure for a pressure sensor, including a pressure sensor housing 1, a cable 2, a positioning rubber ring 3, a positioning groove 4, a protective rubber tower 5, a side sealing groove 6, a side sealing ring 7, a sealant 8, a main heat shrink sleeve 9, a retaining ring 10, a convex ring 11, a secondary heat shrink sleeve 12, an inner sealing ring 13, and a cable tie 14. The cable 2 is installed at one end of the pressure sensor housing 1. A positioning rubber ring 3 is provided on the outer side of the cable 2 near the end of the pressure sensor housing 1. The positioning rubber ring 3 fits against the inner wall of the positioning groove 4. The positioning groove 4 is opened on the inner wall of the protective rubber tower 5. The above structural design can position the protective rubber tower 5 and prevent the protective rubber tower 5 from sliding or displacing.

[0021] During assembly, first place the protective adhesive tower 5 as... Figure 2 As shown, it is sleeved on cable 2 and slid to... Figure 2 At the position shown, the positioning rubber ring 3 fits into the positioning groove 4, the side sealing groove 6 engages with the side sealing ring 7, then the main heat shrink sleeve 9 is fitted onto the connection between the pressure sensor housing 1 and the cable 2, sealant 8 is injected into the inner side of the main heat shrink sleeve 9 and between the protective rubber tower 5, and hot air is blown onto the main heat shrink sleeve 9 to tighten the main heat shrink sleeve 9.

[0022] Positioning grooves 4 are evenly distributed on the inner wall of the protective rubber tower 5. The protective rubber tower 5 is shaped like a frustum and is made of rubber. The above structural design can enhance the positioning effect of the protective rubber tower 5 and ensure that the protective rubber tower 5 is always in contact with the end face of the pressure sensor housing 1. A side sealing groove 6 is provided at the contact point between the protective rubber tower 5 and the end face of the pressure sensor housing 1. The inner wall of the side sealing groove 6 is in contact with the side sealing ring 7. The side sealing ring 7 is fixed on the end face of the pressure sensor housing 1. The above structural design can seal the contact point between the protective rubber tower 5 and the pressure sensor housing 1. The cable 2 is installed with the protective rubber tower 5 near the end of the pressure sensor housing 1.

[0023] A sealant 8 is provided on the outside of the protective adhesive tower 5. A main heat shrink sleeve 9 is wrapped around the outside of the sealant 8. One end of the main heat shrink sleeve 9 is attached to one side of the retaining ring 10. The retaining ring 10 is fixed on the outer wall of the pressure sensor housing 1. A convex ring 11 is provided on the outer wall of the pressure sensor housing 1 on one side of the retaining ring 10. The convex ring 11 is attached to the inner side of one end of the main heat shrink sleeve 9. The convex ring 11 and the pressure sensor housing 1 are integrally set. The convex rings 11 are evenly spaced. The surface of the convex ring 11 is set as a matte finish. The above structural design can increase the friction between the main heat shrink sleeve 9 and the outer surface of the pressure sensor housing 1, and prevent the end of the pressure sensor housing 1 from sliding.

[0024] The other end of the main heat shrink sleeve 9 is covered with a secondary heat shrink sleeve 12. An inner sealing ring 13 is fitted on the cable 2 that is attached to the other end of the main heat shrink sleeve 9. A cable tie 14 is installed on the secondary heat shrink sleeve 12. The frontal width of the cable tie 14 is greater than half the frontal length of the part of the secondary heat shrink sleeve 12 that is attached to the end of the main heat shrink sleeve 9. The length of the part of the secondary heat shrink sleeve 12 that is attached to the end of the main heat shrink sleeve 9 is greater than 1 / 3 of the overall length of the secondary heat shrink sleeve 12. The above structural design can seal the end of the main heat shrink sleeve 9 and prevent the end of the main heat shrink sleeve 9 from loosening.

[0025] After the left end of the main heat shrink sleeve 9 is tightened, it is as follows: Figure 2 As shown, it fits against one side of the retaining ring 10 and the inner side fits against the convex ring 11 to ensure the stability of the left end of the main heat shrink sleeve 9. Then, the inner sealing ring 13 is fitted onto the right end of the main heat shrink sleeve 9, and the auxiliary heat shrink sleeve 12 is fitted onto the outer side of the right end of the main heat shrink sleeve 9. Hot air is blown onto the auxiliary heat shrink sleeve 12, which shrinks. The auxiliary heat shrink sleeve 12 is then squeezed and fixed to the right end of the main heat shrink sleeve 9 using cable ties 14, thus achieving a stable and waterproof seal at the connection between the pressure sensor housing 1 and the cable 2.

[0026] 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 waterproof structure for a pressure sensor, comprising a pressure sensor housing (1), characterized in that: A cable (2) is installed at one end of the pressure sensor housing (1). A protective glue tower (5) is installed at the end of the cable (2) near the pressure sensor housing (1). A sealant (8) is provided on the outside of the protective glue tower (5). A main heat shrink sleeve (9) is wrapped around the outside of the sealant (8). One end of the main heat shrink sleeve (9) is attached to one side of the retaining ring (10). The retaining ring (10) is fixed on the outer wall of the pressure sensor housing (1). A protruding ring (11) is provided on the outer wall of the pressure sensor housing (1) on one side of the retaining ring (10). The protruding ring (11) is attached to the inner side of one end of the main heat shrink sleeve (9). A secondary heat shrink sleeve (12) is wrapped around the other end of the main heat shrink sleeve (9). An inner sealing ring (13) is fitted on the cable (2) attached to the other end of the main heat shrink sleeve (9). A cable tie (14) is installed on the secondary heat shrink sleeve (12).

2. The waterproof structure for a pressure sensor according to claim 1, characterized in that: A positioning rubber ring (3) is provided on the outer side of the cable (2) near the pressure sensor housing (1). The positioning rubber ring (3) fits against the inner wall of the positioning groove (4). The positioning groove (4) is opened on the inner wall of the protective rubber tower (5).

3. The waterproof structure for a pressure sensor according to claim 2, characterized in that: The positioning grooves (4) are evenly distributed on the inner wall of the protective glue tower (5), the protective glue tower (5) is set in a frustum shape, and the material of the protective glue tower (5) is rubber.

4. The waterproof structure for a pressure sensor according to claim 1, characterized in that: A side sealing groove (6) is provided at the joint between the protective rubber tower (5) and the end face of the pressure sensor housing (1). The inner wall of the side sealing groove (6) is in contact with the side sealing ring (7), and the side sealing ring (7) is fixed on the end face of the pressure sensor housing (1).

5. The waterproof structure for a pressure sensor according to claim 1, characterized in that: The convex ring (11) and the pressure sensor housing (1) are integrated. The convex ring (11) are evenly spaced and the surface of the convex ring (11) is matte.

6. The waterproof structure for a pressure sensor according to claim 1, characterized in that: The frontal width of the cable tie (14) is greater than half the frontal length of the portion of the auxiliary heat shrink sleeve (12) and the main heat shrink sleeve (9) that are attached at the end. The length of the portion of the auxiliary heat shrink sleeve (12) and the main heat shrink sleeve (9) that are attached at the end is greater than 1 / 3 of the overall length of the auxiliary heat shrink sleeve (12).

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