Waterproof pressure gauge structure

Abstract

The utility model discloses a waterproof pressure gauge structure. According to the technical scheme, the waterproof pressure gauge comprises a pressure gauge main shell, the pressure gauge main shell comprises an inner cavity and a base cavity, a PCB is arranged in the inner cavity, and the inner cavity is waterproof through superposition of a gland seat, a sealing ring, a waterproof instrument sticker, a dial gland and a pressure gauge decorative cover. Waterproof sealing of the base cavity is achieved through the pressing ring and the pressure gauge base, fixing and waterproof sealing of the wire are achieved through the cable waterproof O-shaped ring, the wire positioning frame and the cable waterproof pressing ring, and the scheme provided by the utility model is excellent in sealing and waterproof performance for the small pressure gauge which is small in internal space and compact in structural design.

Description

Technical Field

[0001] This utility model relates to the field of pressure measurement instrument technology, and in particular to a waterproof pressure gauge structure. Background Technology

[0002] Pressure gauges are instruments that use elastic elements as sensing elements to measure and indicate pressures higher than ambient pressure. They are extremely common, found in almost all industrial processes and scientific research fields, and are ubiquitous in areas such as heat pipe networks, oil and gas transmission, water and gas supply systems, and vehicle repair and maintenance shops. However, pressure gauges used in equipment such as filters and cleaning machines are prone to contact with various solutions. Solution leakage into the gauge can affect its measurement accuracy and even directly damage it. Therefore, the sealing design is particularly important for small pressure gauges with limited internal space and compact structures. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the main purpose of this utility model is to provide a small pressure gauge with excellent sealing and waterproof performance, small internal space and compact structural design.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a waterproof pressure gauge structure, comprising a main housing of the pressure gauge, the main housing including an inner cavity and a base cavity, a dial hole provided on the inner cavity, a plurality of connecting posts provided on the inner wall of the inner cavity, each connecting post having a threaded hole, a pressure cover seat connected to the inner cavity via the connecting posts, the pressure cover seat being fixedly connected to the threaded hole by screws, a dial slot provided on the pressure cover seat for placing the instrument panel, the instrument panel being connected to a PCB board, the PCB board being disposed in the inner cavity, a waterproof instrument sticker affixed to the instrument panel, a case cover connected to the pressure cover seat to press the instrument panel tightly, the case cover cover and the pressure cover seat being locked together by screws, a sealing step provided on the outer wall of the pressure cover seat, a sealing ring fitted on the sealing step, the case cover cover covering... The pressure gauge includes a pressure cover that can seal the sealing step and sealing ring. The front of the main housing of the pressure gauge has several mounting holes. It also includes a pressure gauge decorative cover that covers the pressure cover. The decorative cover has mounting posts that mate with the mounting holes. The main housing has a wire extending into the inner cavity on its back side. A cable waterproof O-ring is fitted onto the wire. A wire positioning frame is also provided at the wire location within the inner cavity. The wire positioning frame is connected by screws to a cable waterproof pressure ring that tightly fits the cable waterproof O-ring onto the wire positioning frame. A wire hole is provided between the inner cavity and the base cavity. From top to bottom, the base cavity contains a diffused silicon, a pressure ring fitted onto the diffused silicon, a pressure gauge diaphragm, and a pressure gauge base. The pressure gauge base is threadedly connected to the base cavity, pushing the diffused silicon and pressure gauge diaphragm into the base cavity.

[0005] Preferably, the inner wall of the inner cavity is provided with an abutment ring that can abut against the bottom of the pressure cap seat.

[0006] Preferably, the dial groove is provided with a positioning protrusion, and the waterproof instrument sticker is provided with a positioning groove that cooperates with the positioning protrusion.

[0007] This invention offers the following advantages over existing technologies: The PCB board is housed within the inner cavity, and the inner cavity is waterproofed through the overlapping arrangement of a pressure cap, sealing ring, waterproof instrument sticker, dial cap, and pressure gauge decorative cover. A pressure ring and pressure gauge base provide a waterproof seal for the base cavity. A waterproof cable O-ring, wire positioning bracket, and waterproof cable pressure ring ensure the wires are fixed and waterproofed. This solution offers excellent sealing and waterproofing performance for small pressure gauges with limited internal space and a compact design. Attached Figure Description

[0008] Figure 1 This is an exploded view of the structure of a waterproof pressure gauge according to this utility model;

[0009] Figure 2 This is a partial exploded view of the structure of a waterproof pressure gauge according to this utility model.

[0010] In the diagram: 1. Pressure gauge main housing; 2. Inner cavity; 3. Base cavity; 4. Dial hole; 5. Connecting post; 6. Cover seat; 7. Dial groove; 8. Instrument panel; 9. PCB board; 10. Waterproof instrument sticker; 11. Housing cover; 12. Sealing step; 13. Sealing ring; 14. Cover part; 15. Mounting hole; 16. Pressure gauge decorative cover; 17. Mounting post; 18. Wire; 19. Cable waterproof O-ring; 20. Wire positioning bracket; 21. Cable waterproof pressure ring; 22. Wire hole; 23. Diffused silicon; 24. Pressure ring; 25. Pressure gauge diaphragm; 26. Pressure gauge base; 27. Abutment ring; 28. Positioning protrusion; 29. ​​Positioning groove. Detailed Implementation

[0011] The present invention will be further described below with reference to the accompanying drawings.

[0012] like Figure 1As shown, a waterproof pressure gauge structure includes a main housing 1, which comprises an inner cavity 2 and a base cavity 3. The inner cavity 2 has a dial hole 4, and the inner wall of the inner cavity 2 has several connecting posts 5, each with a threaded hole. A pressure cap seat 6 is connected to the inner cavity 2 via the connecting posts 5, and the pressure cap seat 6 is fixedly connected to the threaded hole by screws. The pressure cap seat 6 has a dial slot 7 for placing an instrument panel 8. The dial 8 is connected to a PCB board 9, which is disposed in the inner cavity 2. A waterproof instrument sticker 10 is affixed to the dial 8. A case cover 11 that can press the dial 8 tightly is also connected to the cover seat 6. The case cover 11 and the cover seat 6 are connected by screws. A sealing step 12 is provided on the outer wall of the cover seat 6. A sealing ring 13 is fitted on the sealing step 12. The case cover 11 includes a cover that can seal and cover the sealing step 12 and the sealing ring 13. Part 14, the front of the pressure gauge main housing 1 is provided with a plurality of mounting holes 15, and also includes a pressure gauge decorative cover 16 that can cover the housing cover 11. The pressure gauge decorative cover 16 is provided with mounting posts 17 that mate with the plurality of mounting holes 15. The pressure gauge main housing 1 is provided with a wire 18 extending into the inner cavity 2 on the back side of the inner cavity 2. The wire 18 is fitted with a cable waterproof O-ring 19. The inner cavity 2 is also provided with a wire positioning bracket 20 at the wire 18. The wire positioning frame 20 is connected by screws to a cable waterproof pressure ring 21 that can tightly fit the cable waterproof O-ring 19 onto the wire positioning frame 20. A wire hole 22 is provided between the inner cavity 2 and the base cavity 3. The base cavity 3 is provided with a diffused silicon 23, a pressure ring 24 sleeved on the diffused silicon 23, a pressure gauge diaphragm 25 and a pressure gauge base 26 arranged sequentially from top to bottom. The pressure gauge base 26 is threadedly connected to the base cavity 3 and pushes the diffused silicon 23 and the pressure gauge diaphragm 25 into the base cavity 3.

[0013] This design presents a waterproof pressure gauge structure with excellent waterproof performance. A PCB board 9 is placed within the inner cavity 2, and the inner cavity 2 is waterproofed through the stacked arrangement of a pressure cap 6, a sealing ring 13, a waterproof instrument sticker 10, a dial cap, and a pressure gauge decorative cover 16. A pressure ring 24 and a pressure gauge base 26 provide a waterproof seal to the base cavity 3. A cable waterproof O-ring 19, a wire positioning bracket 20, and a cable waterproof pressure ring 21 secure and waterproof the wire 18. This design offers excellent sealing performance for small pressure gauges with limited internal space and a compact structural design.

[0014] Preferably, the inner wall of the inner cavity 2 is provided with an abutment ring 27 that can abut against the bottom of the pressure cap seat 6. The abutment ring 27 enables the pressure cap seat 6 to be placed very accurately into the inner cavity 2, improving assembly accuracy and waterproof effect.

[0015] Preferably, the dial groove 7 is provided with a positioning protrusion 28, and the waterproof instrument sticker 10 is provided with a positioning groove 29 that cooperates with the positioning protrusion 28.

[0016] The advantage of this setup is that the waterproof instrument sticker 10 can be accurately attached to the dial slot 7.

[0017] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A waterproof pressure gauge structure, comprising a main housing of the pressure gauge, characterized in that: The pressure gauge main housing includes an inner cavity and a base cavity. The inner cavity has a dial hole, and its inner wall has several connecting posts, each with a threaded hole. A pressure cover seat is connected to the inner cavity via the connecting posts. The pressure cover seat is fixedly connected to the threaded hole by screws. The pressure cover seat has a dial slot for placing the instrument panel. The instrument panel is connected to a PCB board, which is located within the inner cavity. A waterproof instrument sticker is affixed to the instrument panel. A pressure cover cover that presses the instrument panel firmly is also connected to the pressure cover seat. The pressure cover cover and pressure cover seat are locked together by screws. A sealing step is provided on the outer wall of the pressure cover seat, and a sealing ring is fitted onto the sealing step. The pressure cover cover includes a cover portion that seals and covers the sealing step and the sealing ring. The pressure gauge main housing has several mounting holes on its front side and includes a pressure gauge decorative cover that covers the pressure gauge cover. The pressure gauge decorative cover has mounting posts that mate with the mounting holes. The pressure gauge main housing has a wire extending into the inner cavity on its back side. A cable waterproof O-ring is fitted onto the wire. A wire positioning frame is also provided at the wire location in the inner cavity. The wire positioning frame is connected by screws to a cable waterproof pressure ring that tightly fits the cable waterproof O-ring onto the wire positioning frame. A wire hole is provided between the inner cavity and the base cavity. The base cavity contains, from top to bottom, a diffused silicon, a pressure ring fitted onto the diffused silicon, a pressure gauge diaphragm, and a pressure gauge base. The pressure gauge base is threadedly connected to the base cavity and pushes the diffused silicon and pressure gauge diaphragm into the base cavity.

2. The waterproof pressure gauge structure according to claim 1, characterized in that: The inner wall of the inner cavity is provided with an abutment ring that can abut against the bottom of the pressure plate seat.

3. The waterproof pressure gauge structure according to claim 1, characterized in that: The dial groove is provided with a positioning protrusion, and the waterproof instrument sticker is provided with a positioning groove that cooperates with the positioning protrusion.

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