CN111089671A

CN111089671A - Pressure sensor

Info

Publication number: CN111089671A
Application number: CN201911346017.1A
Authority: CN
Inventors: 吴学超
Original assignee: Jiashan Haihong Electronic Component Factory
Current assignee: Jiashan Haihong Electronic Component Factory
Priority date: 2019-12-24
Filing date: 2019-12-24
Publication date: 2020-05-01

Abstract

The invention relates to the technical field of mining instruments and discloses a pressure sensor which comprises a box body, wherein the box body is symmetrically provided with clapboards, one of the clapboards and one side wall of the box body form a first installation cavity, the other clapboard and one side wall of the box body form a second installation cavity, a first baffle is arranged between the two clapboards, the side wall of one side of the box body is fixedly connected with a sensor part, the side wall of the first installation cavity is fixedly connected with a power supply, a humidity sensing device is embedded in the clapboard at one side of the second installation cavity, a first switch is arranged on the side wall of one side of the first installation cavity, and a third installation cavity is formed between the first baffle and the side wall of the box body. The pressure sensor can sense the humidity of the environment and take away the water vapor in the sensor through evaporation.

Description

Pressure sensor

Technical Field

The invention relates to the technical field of mining instruments, in particular to a pressure sensor.

Background

The pressure sensor is an automatic monitoring device which integrates a microcomputer technology and a computer technology and automatically measures and transmits the stress change condition of the anchor cable of the underground coal mine. The retrieval chinese patent No. CN209470797U proposes a pressure sensor, which uses PA polyamide material to prevent corrosion and rust of the housing, but the housing cannot be made into a completely sealed state, otherwise, the sensor data collection can be affected, the air humidity is high, and the internal element of the pressure sensor can be affected, and meanwhile, the moisture in the air can cause condensation on the surface of the part, which results in an increase in the damage rate of the device.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides the pressure sensor which has the advantages of being capable of sensing humidity for dehumidification, automatically adjusting temperature and the like, and solves the problems in the background art.

(II) technical scheme

In order to achieve the purposes of sensing humidity for dehumidification and automatically adjusting temperature, the invention provides the following technical scheme: a pressure sensor comprises a box body, wherein the box body is symmetrically provided with clapboards, one of the clapboards and one side wall of the box body form a first installation cavity, the other clapboard and one side wall of the box body form a second installation cavity, a first baffle is arranged between the two clapboards, a sensor part is fixedly connected on one side wall of the box body, a power supply is fixedly connected on the side wall of the first installation cavity, a humidity sensing device is embedded on the clapboard at one side of the first installation cavity, a first switch is arranged on one side wall of the first installation cavity, a third installation cavity is formed between the first baffle and the side wall of the box body, a heating resistance wire is fixedly connected on the side wall of the third installation cavity, a plurality of heat dissipation holes are formed on one side wall of the third installation cavity, an air vent is formed on the clapboard at one side of the second installation cavity, and an air outlet hole is formed at the lower end of the clapboard, the middle part of second installation cavity is provided with the mounting panel, and fixedly connected with cooler bin on one side lateral wall of mounting panel, and the lower extreme of cooler bin is provided with the basin, the gas outlet has been seted up on one side lateral wall of second installation cavity.

Preferably, a bimetallic strip is arranged on the side wall of one side of the third mounting cavity, a second switch is fixedly connected to the side wall of one side of the first mounting cavity, and the second switch and the first switch form a double-control switch.

Preferably, humidity sensing device includes the sleeve pipe, the intraductal annular that is provided with of cover keeps off the shoulder, one side that the shoulder was kept off to the annular is provided with the slide, and fixedly connected with ejector pin on one side lateral wall of slide, slide and annular keep off through compression spring fixed connection between the shoulder, one side fixedly connected with connecting rod of slide, and the one end fixedly connected with push pedal of connecting rod, the sheathed tube bottom is seted up for the filter screen, it has the inflation soil to fill between push pedal and the filter screen.

Preferably, a valve is arranged at the air outlet in the side wall of the second mounting cavity, the type of the valve is selected as a gas one-way valve, and a heat insulation protective sleeve is wrapped outside the gas one-way valve.

Preferably, pass through welded connection between mounting panel and the lateral wall in the second installation cavity, and be provided with thermal-insulated equipment on the mounting panel, thermal-insulated equipment is aerogel pad.

Preferably, the ejector rod is provided with an external thread, the sliding plate is provided with a threaded hole, and the ejector rod is in threaded connection with the sliding plate.

(III) advantageous effects

Compared with the prior art, the invention has the following beneficial effects:

1. this kind of pressure sensor, through parts such as heating resistor silk and humidity induction system that set up, can be through feeling the humidity of pressure sensor place environment, when humidity is too big and exist moist environment for a long time, humidity induction system can open the switch and supply power to heating resistor silk, takes away the steam in the sensor through the evaporation.

2. This kind of pressure sensor, parts such as bimetallic strip and double control switch through setting up can in time experience the temperature in the environment, and when heating temperature was too high, the timely power of closing the heating resistor silk avoided causing high temperature damage phenomenon.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic cross-sectional front view of the present invention;

FIG. 3 is an enlarged schematic view of the structure at A in FIG. 2;

in the figure: 1. a box body; 2. a first mounting cavity; 3. a power source; 4. a sleeve; 5. a sensor component; 6. An air outlet; 7. a cooling tank; 8. an air outlet; 9. a vent hole; 10. a third mounting cavity; 11. heating resistance wires; 12. a second mounting cavity; 13. a first baffle plate; 14. a bimetal; 15. a second switch; 16. A partition plate; 17. a first switch; 18. a top rod; 19. a slide plate; 20. a compression spring; 21. an annular shoulder; 22. a connecting rod; 23. pushing the plate; 24. expansive soil; 25. and (5) filtering by using a filter screen.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

Referring to fig. 1-3, a pressure sensor comprises a pressure sensor body 1, wherein the pressure sensor body 1 is symmetrically provided with a partition plate 16, one partition plate 16 and one side wall of the pressure sensor body 1 form a first installation cavity 2, the other partition plate 16 and one side wall of the pressure sensor body 1 form a second installation cavity 12, a first baffle plate 13 is arranged between the two partition plates 16, one side wall of the pressure sensor body 1 is fixedly connected with a sensor part 5, the side wall of the first installation cavity 2 is fixedly connected with a power supply 3, a humidity sensing device is embedded on the partition plate 16 at one side of the first installation cavity 2 and comprises a sleeve 4, an annular blocking shoulder 21 is arranged in the sleeve 4, one side of the annular blocking shoulder 21 is provided with a sliding plate 19, one side wall of the sliding plate 19 is fixedly connected with a mandril 18, the mandril 18 is provided with external threads, the sliding plate 19 is provided with, the ejector rod 18 is connected with the sliding plate 19 through screw threads, the ejector rod 18 and the sliding plate 19 can be conveniently installed and detached by arranging the screw threads, the sliding plate 19 is fixedly connected with the annular retaining shoulder 21 through a compression spring 20, one side of the sliding plate 19 is fixedly connected with a connecting rod 22, one end of the connecting rod 22 is fixedly connected with a push plate 23, the bottom of the sleeve 4 is opened to form a filter screen 25, expansive soil 24 is filled between the push plate 23 and the filter screen 25, the arranged humidity sensing device can react to the humidity environment in the sensor and timely carry out dehumidification work to ensure the working environment of the sensor part 5, a first switch 17 is arranged on the side wall of one side of the first installation cavity 2, a third installation cavity 10 is formed between the first baffle 13 and the side wall of the box body 1, a heating resistance wire 11 is fixedly connected onto the side wall of the third installation cavity 10, and a plurality of heat dissipation holes are formed on the side wall of, an air vent 9 is arranged on a partition plate 16 on one side of a second mounting cavity 12, an air outlet 6 is arranged at the lower end of the partition plate 16, a mounting plate is arranged in the middle of the second mounting cavity 12, a cooling box 7 is fixedly connected to the side wall of one side of the mounting plate, a water tank is arranged at the lower end of the cooling box 7, the arranged cooling box 7 can prevent high-temperature gas from directly discharging into a mine passage to cause danger, meanwhile, the water tank can contain water which can be condensed with the side wall of the cooling box 7, an air outlet 8 is arranged on the side wall of one side of the second mounting cavity 12, a valve is arranged at the air outlet 8, the model of the valve is selected as a gas one-way valve, a heat insulation protective sleeve is wrapped outside the gas one-way valve, the arranged one-way valve can prevent moist gas from entering a pressure sensor from the air outlet 8, and the protective sleeve can prevent, causing damage to the operator.

Example 2

Based on embodiment 1, as shown in fig. 2, a bimetallic strip 14 is arranged on one side wall of the third installation cavity 10, a second switch 15 is fixedly connected to one side wall of the first installation cavity 2, and the second switch 15 and the first switch 17 form a double-control switch, and through the bimetallic strip 14 and the double-control switch, the temperature in the environment can be sensed in time, when the heating temperature is too high, the bimetallic strip 14 is bent, and then the second switch 15 is extruded, the power supply 3 of the heating resistance wire 11 is turned off in time, so that the heating resistance wire 11 is prevented from continuously working, and the high-temperature damage phenomenon is caused.

The working principle is as follows: when the humidity in the sensor is higher, the expansive soil 24 can absorb water vapor through the filter screen 25, the expansive soil 24 after absorbing the water vapor can expand to further push the push plate 23 to move forwards, the push plate 23 drives the slide plate 19 forwards through the connecting rod 22, the slide plate 19 drives the ejector rod 18 to push the first switch 17 forwards, the first switch 17 can turn on the power supply 3 and supply power to the heating resistance wire 11, the heating resistance wire 11 generates heat and enters the second installation cavity 12 through the heat dissipation holes, the heat in the second installation cavity 12 enters the installation space of the sensor part 5 through the vent hole 9, high-temperature air takes away condensation on the sensor part 5 and water vapor in the installation space, the condensation on the sensor part 5 enters the second installation cavity 12 through the air outlet 6, and the air with the water vapor is discharged through the air outlet 8 after being cooled by the cooling box 7;

further, when the temperature in the sensor is high, the bimetallic strip 14 bends to press the second switch 15, the second switch 15 cuts off the power supply 3 to supply power to the heating resistance wire 11, and the sensor component 5 is prevented from being damaged by continuous heating;

further, after the moisture in the sensor evaporates, the expansive soil 24 can be restored, the sliding plate 19 is restored under the driving of the compression spring 20, and then the sliding plate 19 pushes the push plate 23 to be restored through the connecting rod 22, and meanwhile, the push rod 18 does not press the first switch 17 any more, and after moisture is removed, the service life of the sensor part 5 can be protected.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A pressure sensor comprises a box body (1), wherein partition plates (16) are symmetrically arranged on the box body (1), one partition plate (16) and the side wall of one side of the box body (1) form a first mounting cavity (2), the other partition plate (16) and the side wall of one side of the box body (1) form a second mounting cavity (12), a first baffle plate (13) is arranged between the two partition plates (16), and a sensor part (5) is fixedly connected to the side wall of one side of the box body (1);

the method is characterized in that:

the side wall of the first installation cavity (2) is fixedly connected with a power supply (3), a partition plate (16) on one side of the first installation cavity (2) is embedded with a humidity sensing device, a first switch (17) is arranged on the side wall of one side of the first installation cavity (2), a third installation cavity (10) is formed between the first baffle (13) and the side wall of the box body (1), a heating resistance wire (11) is fixedly connected onto the side wall of the third installation cavity (10), a plurality of radiating holes are formed on the side wall of one side of the third installation cavity (10), the partition plate (16) on one side of the second installation cavity (12) is provided with an air vent (9), the lower end of the partition plate (16) is provided with an air outlet hole (6), the middle part of the second installation cavity (12) is provided with an installation plate, a cooling box (7) is fixedly connected onto the side wall of one side of the installation plate, and the lower end of the cooling box (7) is, an air outlet (8) is formed in the side wall of one side of the second mounting cavity (12).

2. A pressure sensor as claimed in claim 1, wherein: a bimetallic strip (14) is arranged on the side wall of one side of the third mounting cavity (10), a second switch (15) is fixedly connected to the side wall of one side of the first mounting cavity (2), and the second switch (15) and the first switch (17) form a double-control switch.

3. A pressure sensor as claimed in claim 1, wherein: humidity induction system includes sleeve pipe (4), it keeps off shoulder (21) to be provided with the annular in sleeve pipe (4), one side that the annular kept off shoulder (21) is provided with slide (19), and fixedly connected with ejector pin (18) on one side lateral wall of slide (19), slide (19) and annular keep off through compression spring (20) fixed connection between shoulder (21), one side fixedly connected with connecting rod (22) of slide (19), and the one end fixedly connected with push pedal (23) of connecting rod (22), open the bottom of sleeve pipe (4) and establish to filter screen (25), it has inflation soil (24) to fill between push pedal (23) and filter screen (25).

4. A pressure sensor as claimed in claim 1, wherein: a valve is arranged at the gas outlet (8) on the side wall of the second mounting cavity (12), a gas one-way valve is selected as the type of the valve, and a heat insulation protective sleeve is wrapped on the outer side of the gas one-way valve.

5. A pressure sensor as claimed in claim 1, wherein: pass through welded connection between mounting panel and the lateral wall in second installation cavity (12), and be provided with thermal-insulated equipment on the mounting panel, thermal-insulated equipment is aerogel pad.

6. A pressure sensor as claimed in claim 3, wherein: the push rod (18) is provided with an external thread, the sliding plate (19) is provided with a threaded hole, and the push rod (18) is connected with the sliding plate (19) through the thread.