CN214621575U - Waterproof pressure transmitter - Google Patents
Waterproof pressure transmitter Download PDFInfo
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- CN214621575U CN214621575U CN202120807847.6U CN202120807847U CN214621575U CN 214621575 U CN214621575 U CN 214621575U CN 202120807847 U CN202120807847 U CN 202120807847U CN 214621575 U CN214621575 U CN 214621575U
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- cavity
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- pipe joint
- waterproof
- detection module
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Abstract
The utility model discloses a waterproof pressure transmitter, include: a housing; the pipe joint is arranged on the shell; the pressure detection module is arranged in a cavity formed by the enclosure of the shell and the pipe joint, and the signal output end of the pressure detection module is connected with a contact on the pipe joint; a first cavity for measuring pressure is formed between the pressure detection module and the bottom surface of the cavity, and a through hole is formed in the bottom surface of the cavity at a position corresponding to the first cavity; the joint of the shell and the pipe joint is filled with a sealing material, the pipe joint is provided with an air hole, and the air hole is covered with a waterproof breathable film. The waterproof breathable film covers the breathable holes, so that water can be prevented from entering the cavity, and meanwhile, the breathable film can also ventilate, and the pressure detection module is prevented from being damaged or losing efficacy.
Description
Technical Field
The utility model relates to a pressure transmitter field, concretely relates to waterproof pressure transmitter.
Background
The pressure transmitter is used for secondary instruments such as an indication alarm instrument, a recorder and an adjusting controller to measure, indicate and adjust the process. The pressure transmitter has the function of converting a measured pressure signal into a voltage signal for output, and converting a digital signal through an analog/digital conversion circuit for reading and controlling by a single chip microcomputer. At present, the pressure transmitter is widely applied to industries such as refrigeration and air conditioning. Most pressure transmitter structures in refrigeration industry combine for casing and coupling, then the turn-ups's of riveting encapsulation mode, however, this kind of technology leakproofness can't guarantee relatively, and liquid such as water in the operational environment can get into the cavity that casing and coupling enclose, causes the damage to pressure sensor and circuit board.
SUMMERY OF THE UTILITY MODEL
For solving the above technical problem, the utility model provides a waterproof pressure transmitter to improve product waterproof nature.
The utility model adopts the following technical scheme:
a waterproof pressure transmitter, comprising: a housing; the pipe joint is arranged on the shell; the pressure detection module is arranged in a cavity formed by the enclosure of the shell and the pipe joint, and the signal output end of the pressure detection module is connected with a contact on the pipe joint; a first cavity for measuring pressure is formed between the pressure detection module and the bottom surface of the cavity, and a through hole is formed in the bottom surface of the cavity at a position corresponding to the first cavity; the joint of the shell and the pipe joint is filled with a sealing material, the pipe joint is provided with an air hole, and the air hole is covered with a waterproof breathable film.
Preferably, the pressure detection module includes: the pressure sensor is fixed in the shell and abuts against the bottom surface of the cavity to form the first cavity; and a signal input end of the circuit board is connected with the pressure sensor, and a signal output end of the circuit board is connected with a contact on the pipe joint.
Preferably, the pressure detection module further comprises a pressing ring installed in the housing so as to press the pressure sensor against the bottom surface of the cavity.
Preferably, the pressing ring is in threaded fit with the shell.
Preferably, the press ring is provided with a screw, and the ground wire led out from the circuit board is fixed on the press ring through the screw.
Preferably, a second cavity is formed between the pressure sensor and the pressure ring.
Preferably, the pouring sealant is filled above the pressure ring, and a ventilation channel is arranged to communicate the second cavity with the ventilation hole.
Preferably, one end of the pouring sealant covers the compression ring, and the other end of the pouring sealant contacts the pipe joint.
Preferably, a third cavity is formed above the pouring sealant, a vent pipe penetrating through the pouring sealant and the pressure ring is arranged, and the second cavity is communicated with the third cavity.
Preferably, a sealing ring is arranged at a position where the pressure detection module is in contact with the bottom surface of the cavity; the through hole is a one-way hole; the end part of the shell is provided with a flanging which is buckled on the pipe joint; the sealing material is filled between the flanging and the pipe joint.
Compared with the prior art, the utility model has the advantages of it is following:
1. the waterproof breathable film covers the breathable holes, so that liquid such as water in a working environment can be prevented from entering the cavity, the sealing performance is improved, ventilation is realized, and the pressure detection module is prevented from being damaged or losing efficacy.
2. The pressure sensor can be prevented from being separated from the installation position due to larger air pressure when the substance to be detected is led into the first cavity through the pressure ring.
3. The clamping ring is in threaded fit with the shell, the pressing effect of the clamping ring on the pressure sensor can be further improved, and the installation is convenient.
4. The pressure ring is fixed on the pressure sensor by using the pouring sealant, the pressure sensor is further fixed, and meanwhile, the end part of the pipe joint and the contact part of the shell can be sealed, so that the sealing effect is further improved.
5. The through hole is a pressure guide hole, and liquid or gas enters the first cavity through the pressure guide hole to contact with the core body of the pressure transmitter, so that the change of pressure is sensed.
Drawings
Fig. 1 is a schematic diagram of a pressure transmitter.
Fig. 2 is a partially enlarged view of a portion a of fig. 1.
In the figure, a shell 1, a pipe joint 2, a pressure detection module 3, a pressure sensor 3-1, a circuit board 3-2, a press ring 3-3, screws 3-4, a first cavity 4, a through hole 5, a sealing material 6, air holes 7, a waterproof air-permeable film 8, a second cavity 9, a pouring sealant 10, a third cavity 11, an air-permeable pipe 12, a flanging 13 and a sealing ring 14 are arranged.
Detailed Description
In order to facilitate understanding of the technical solutions of the present invention, the following detailed description is made with reference to the accompanying drawings and specific embodiments.
Example 1
As shown in fig. 1-2, a waterproof pressure transmitter includes:
a housing 1;
a pipe joint 2 mounted on the housing 1;
the pressure detection module 3 is arranged in a cavity formed by the enclosure of the shell 1 and the pipe joint 2, and the signal output end of the pressure detection module is connected with a contact on the pipe joint 2;
a first cavity 4 for measuring pressure is formed between the pressure detection module 3 and the bottom surface of the cavity, a through hole 5 is formed in the bottom surface of the cavity at a position corresponding to the first cavity 4, a substance to be measured can be contained in the first cavity 4, the substance to be measured enters the first cavity 4 through the through hole 5, the through hole 5 is a pressure leading hole, and liquid or gas enters the first cavity 4 through the pressure leading hole to contact the pressure detection module 3, so that the change of the pressure is sensed;
the junction of casing 1 and coupling 2 is filled with sealing material 6, can improve the leakproofness, riser joint 2 is last to have seted up bleeder vent 7, and this bleeder vent coats and is stamped waterproof ventilated membrane 8, can prevent that water from getting into in the cavity, causes the damage to pressure measurement module 3, allows the cavity to carry out the circulation of gas with the external world simultaneously, guarantees pressure measurement module 3's stable performance, guarantees promptly that the atmospheric pressure of pressure measurement module 3 one side is atmospheric pressure.
In this embodiment, the housing 1 is made of metal, and the pipe joint 2 is a plastic pekow.
The pressure detection module 3 includes:
the pressure sensor 3-1 is fixed in the shell 1 and abuts against the bottom surface of the cavity to form the first cavity 4;
and a signal input end of the circuit board 3-2 is connected with the pressure sensor 3-1, and a signal output end of the circuit board is connected with a contact on the pipe joint 2. The heat generated by the pressure sensor 3-1 and the circuit board 3-2 is dissipated to the outside through the air holes 7.
When the pressure sensor is used, one end of the pressure sensor 3-1 is connected with the outside through the air vent 7, the air pressure at one side of the pressure sensor 3-1 is ensured to be the atmospheric pressure, and a substance to be detected is led into the first cavity 4 at the other end of the pressure sensor 3-1, so that the pressure sensor 3-1 can sense the pressure difference at two sides, and the pressure of the substance to be detected is detected.
In the embodiment, in order to fix the pressure sensor 3-1, the pressing ring 3-3 is installed in the housing 1, the pressure sensor 3-1 is pressed on the bottom surface of the cavity by the pressing ring 3-3, and the pressure sensor 3-1 is prevented from being separated from the installation position by large air pressure when a substance to be measured is introduced into the first cavity 4. As a preferred embodiment of this embodiment, the pressing ring 3-3 is in threaded fit with the housing 1, so that the pressing effect of the pressing ring 3-3 on the pressure sensor 3-1 can be further increased, the mounting is convenient, the pressure sensor can adapt to pressure sensors with different thicknesses, and the adaptability and the universality of products are improved.
The press ring 3-3 is provided with a screw 3-4, and a grounding wire led out from the circuit board 3-2 is fixed on the press ring 3-3 through the screw 3-4 to realize grounding.
A second cavity 9 is formed between the pressure sensor 3-1 and the pressing ring 3-3, the circuit board 3-2 is located in the second cavity 9, and the circuit board 3-2 penetrates through the pressing ring 3-3 through a signal line to be connected with a contact on the pipe joint 2.
The potting adhesive 10 is filled above the pressure ring 3-3, on one hand, the waterproof effect is further improved by the sealing between the potting adhesive 10 and the inner wall of the shell 1, on the other hand, the pressure ring 3-3 is fixed on the pressure sensor 3-1 by the potting adhesive 10, the pressure sensor 3-1 is further fixed, and a ventilation channel is arranged to communicate the second cavity 9 with the ventilation hole 7. In this example, a third cavity 11 is formed between the upper part of the potting adhesive 10 and the pipe joint 2, a vent pipe 12 penetrating through the potting adhesive 10 and the press ring 3-3 is arranged to communicate the second cavity 9 with the third cavity 11, and heat generated by the pressure sensor 3-1 and the circuit board 3-2 is dissipated to the outside through the vent pipe 12 and the vent hole 7, so that stable performance of the sensor is ensured. One end of the vent pipe 12 is higher than the upper surface of the pouring sealant 10, even if part of water enters the third cavity 11, the water cannot enter the second cavity 9 as long as the water does not pass through the highest position of the vent pipe 12, and the pressure sensor 3-1 and the circuit board 3-2 are damaged.
One end of the pouring sealant 10 covers the compression ring 3-3, the other end of the pouring sealant 10 is in contact with the pipe joint 2, namely the pouring sealant 10 extends to the pipe joint 2 from the surface of the compression ring 3-3, the contact part of the end part of the pipe joint 2 and the shell 1 is sealed, and the water resistance is further improved by utilizing the sealing of the pouring sealant 10, the pipe joint 2 and the inner wall of the shell 1. In addition, the outgoing line (signal line) of the circuit board 3-2 can be fixed by the pouring sealant 10, and meanwhile, the grounding line and the screw 3-4 are poured and sealed inside, so that the stability of the product quality is ensured.
A sealing ring 14 is arranged at the contact part of the pressure detection module 3 and the bottom surface of the cavity, so that a substance to be detected is prevented from entering the second cavity 9 through a gap between the pressure detection module 3 and the bottom surface of the cavity; the through hole 5 is a one-way hole, and only the substance to be detected is allowed to enter the first cavity 4 through the through hole 5.
The end part of the shell 1 is provided with a flange 13, and the flange 13 is buckled on the pipe joint 2; the sealing material 6 is filled between the flange 13 and the pipe joint 2 for sealing, and water is prevented from entering the cavity from a gap between the flange 13 and the pipe joint 2.
The above is only the preferred embodiment of the present invention, and the protection scope of the present invention is defined by the scope defined by the claims, and a plurality of modifications and decorations made by those skilled in the art without departing from the spirit and scope of the present invention should also be regarded as the protection scope of the present invention.
Claims (10)
1. A waterproof pressure transmitter, comprising:
a housing (1);
a pipe joint (2) mounted on the housing (1);
the pressure detection module (3) is arranged in a cavity formed by the enclosure of the shell (1) and the pipe joint (2), and the signal output end of the pressure detection module is connected with a contact on the pipe joint (2);
the method is characterized in that: a first cavity (4) for measuring pressure is formed between the pressure detection module (3) and the bottom surface of the cavity, and a through hole (5) is formed in the bottom surface of the cavity and corresponds to the first cavity (4); the joint of the shell (1) and the pipe joint (2) is filled with a sealing material (6), the pipe joint (2) is provided with a vent hole (7), and the vent hole is covered with a waterproof breathable film (8).
2. Waterproof pressure transmitter according to claim 1, characterized in that the pressure detection module (3) comprises:
the pressure sensor (3-1) is fixed in the shell (1) and abuts against the bottom surface of the cavity to form the first cavity (4);
and the signal input end of the circuit board (3-2) is connected with the pressure sensor (3-1), and the signal output end of the circuit board is connected with the contact on the pipe joint (2).
3. The waterproof pressure transmitter of claim 2 wherein: the pressure detection module (3) further comprises a pressing ring (3-3) which is arranged in the shell (1) so as to press the pressure sensor (3-1) on the bottom surface of the cavity.
4. The waterproof pressure transmitter of claim 3 wherein: the compression ring (3-3) is in threaded fit with the shell (1).
5. The waterproof pressure transmitter of claim 3 wherein: the pressing ring (3-3) is provided with a screw (3-4), and a grounding wire led out from the circuit board (3-2) is fixed on the pressing ring (3-3) through the screw (3-4).
6. The waterproof pressure transmitter of claim 3 wherein: a second cavity (9) is formed between the pressure sensor (3-1) and the pressure ring (3-3).
7. The waterproof pressure transmitter of claim 6 wherein: and a pouring sealant (10) is filled above the pressure ring (3-3), and a ventilation channel is arranged to communicate the second cavity (9) with the ventilation hole (7).
8. The waterproof pressure transmitter of claim 7, wherein: one end of the pouring sealant (10) covers the pressing ring (3-3), and the other end of the pouring sealant is in contact with the pipe joint (2).
9. The waterproof pressure transmitter of claim 7, wherein: a third cavity (11) is formed above the pouring sealant (10), and a vent pipe (12) penetrating through the pouring sealant (10) and the pressure ring (3-3) is arranged to communicate the second cavity (9) with the third cavity (11).
10. The waterproof pressure transmitter of claim 1 wherein: a sealing ring (14) is arranged at the position where the pressure detection module (3) is contacted with the bottom surface of the cavity; the through hole (5) is a pressure guide hole; a flanging (13) is arranged at the end part of the shell (1), and the flanging (13) is buckled on the pipe joint (2); the sealing material (6) is filled between the flanging (13) and the pipe joint (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120807847.6U CN214621575U (en) | 2021-04-20 | 2021-04-20 | Waterproof pressure transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120807847.6U CN214621575U (en) | 2021-04-20 | 2021-04-20 | Waterproof pressure transmitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214621575U true CN214621575U (en) | 2021-11-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120807847.6U Active CN214621575U (en) | 2021-04-20 | 2021-04-20 | Waterproof pressure transmitter |
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| Country | Link |
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| CN (1) | CN214621575U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114509202A (en) * | 2021-12-29 | 2022-05-17 | 浙江力夫传感技术有限公司 | Spherical pressure sensor and air pressure control balance adjusting system using same |
| CN114526858A (en) * | 2021-12-29 | 2022-05-24 | 浙江力夫传感技术有限公司 | High-reliability pressure transmitter |
| CN115325165A (en) * | 2022-10-17 | 2022-11-11 | 南京数智微传感科技有限公司 | Waterproof control system for underwater measurement force sensor |
-
2021
- 2021-04-20 CN CN202120807847.6U patent/CN214621575U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114509202A (en) * | 2021-12-29 | 2022-05-17 | 浙江力夫传感技术有限公司 | Spherical pressure sensor and air pressure control balance adjusting system using same |
| CN114526858A (en) * | 2021-12-29 | 2022-05-24 | 浙江力夫传感技术有限公司 | High-reliability pressure transmitter |
| CN114526858B (en) * | 2021-12-29 | 2023-10-20 | 浙江力夫传感技术有限公司 | High-reliability pressure transmitter |
| CN114509202B (en) * | 2021-12-29 | 2024-04-16 | 浙江力夫传感技术有限公司 | Spherical pressure sensor and air pressure control balance adjustment system using the same |
| CN115325165A (en) * | 2022-10-17 | 2022-11-11 | 南京数智微传感科技有限公司 | Waterproof control system for underwater measurement force sensor |
| CN115325165B (en) * | 2022-10-17 | 2023-01-24 | 南京数智微传感科技有限公司 | Waterproof control system for underwater measurement force sensor |
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