Pressure alarm device of natural gas storage equipment

Abstract

The utility model relates to the technical field of pressure alarm devices, in particular to a pressure alarm device of natural gas storage equipment, which comprises a pressure alarm device body, a fixing frame arranged at the lower end of the pressure alarm device body, a threaded rod arranged at the lower end of the fixing frame, and a stabilizing structure mounted at the lower end of the fixing frame in a threaded manner. The stabilizing structure comprises a semiconductor thermostat, first transmission wires are symmetrically arranged at the lower end part of the semiconductor thermostat, a conduction sheet is arranged between the two first transmission wires, and by arranging the stabilizing structure, when the temperature of the conduction sheet is greatly changed, the semiconductor thermostat is started at the moment; the temperature of the conduction sheet is changed through the first transmission wire, and the conduction sheet transmits cold temperature to the strain gauge through the temperature conduction wire, so that the strain gauge is always maintained in a constant temperature state, the influence of temperature change on the measurement precision of the strain gauge can be effectively avoided, and the accuracy of pressure measurement is greatly improved.

Description

Technical Field

[0001] This utility model relates to the technical field of pressure alarm devices, and in particular to a pressure alarm device for a natural gas storage device. Background Technology

[0002] A pressure alarm device for natural gas storage equipment is a safety device used to monitor the internal pressure of gas storage equipment in real time and trigger an alarm when the pressure exceeds the safe range. Its core function is to prevent accidents such as leakage and explosion caused by abnormal pressure (too high or too low).

[0003] A search of Chinese patent publication number "CN217559582U" reveals "a pressure alarm device for a natural gas storage device". By using a three-way connecting pipe to connect the pressure gauge and the device box, the normal use of the existing pressure gauge is ensured. The alarm is triggered by the sealing block connected by a spring in the device box, thereby realizing on-site alarm. At the same time, the position of the contact switch can be adjusted by using a screw, thereby adjusting the alarm threshold, making it more adaptable.

[0004] Based on the above search and existing technology, it was found that the above patent has certain defects. Currently, traditional pressure alarm devices usually rely on strain gauges to detect the internal pressure of natural gas storage equipment. However, since the strain gauge is based on the strain effect of metal, when the metal material undergoes mechanical deformation, its resistance value will change with the strain. But this device has a defect, that is, it is difficult to maintain the internal metal strain gauge in a constant and stable temperature environment for pressure measurement, which interferes with the original stable relationship between the resistance value of the metal strain gauge and the strain, resulting in deviations in the measurement data and insufficient accuracy, which needs to be improved. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides a pressure alarm device for natural gas storage equipment, which solves the technical problem of inaccurate measurement in existing devices.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A pressure alarm device for a natural gas storage equipment includes a pressure alarm device body, a fixed frame at the lower end of the pressure alarm device body, a strain gauge pressure sensor, a temperature sensor and a PCB board inside the fixed frame, a threaded rod at the lower end of the fixed frame, a strain gauge at the lower end of the threaded rod, a through groove inside the threaded rod, and a stabilizing structure threadedly installed at the lower end of the fixed frame.

[0010] The stabilizing structure includes a semiconductor thermostat, with first transmission wires symmetrically arranged at the lower end of the semiconductor thermostat, a conductive plate between the two first transmission wires, and a support at the lower end of the semiconductor thermostat.

[0011] Preferably, the conductive plate is located inside the bracket, the bracket is fixedly installed with the conductive plate, and temperature conductive wires are symmetrically fixedly installed at the lower end of the conductive plate. Both temperature conductive wires are fixedly installed with the strain gauge, and both temperature conductive wires are silver-plated copper wires. Both temperature conductive wires can transfer the temperature of the conductive plate to the strain gauge.

[0012] Preferably, the upper end of the strain gauge is provided with a second transmission wire, which is connected to a strain-type pressure sensor inside the fixture. The upper end of the strain gauge is fixedly installed with a third transmission wire, which is connected to a temperature sensor. The third transmission wire can transmit the current temperature of the strain gauge to the temperature sensor.

[0013] Preferably, the pressure alarm device body has a data dial on its surface and a warning light at its upper end, which can change between red, green and yellow.

[0014] (III) Beneficial Effects

[0015] Firstly, by setting a stable structure, when the temperature of the conductive plate changes significantly, the semiconductor thermostat will be activated and change the temperature of the conductive plate through the first transmission wire. The conductive plate then transmits the cold temperature to the strain gauge through the temperature transmission wire, thereby keeping the strain gauge at a constant temperature. This effectively avoids the impact of temperature changes on the measurement accuracy of the strain gauge and greatly improves the accuracy of pressure measurement.

[0016] Secondly, by using two temperature conduction wires to transfer the temperature of the conductive plate to the strain gauge, and because flexible wires are used for temperature transfer, the traditional mechanical connection can be avoided from causing other effects on the conductive plate, thereby further improving accuracy. Attached Figure Description

[0017] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a three-dimensional exploded view of the structure of this utility model.

[0020] Figure 3 This is a cross-sectional view of the strain gauge of this utility model;

[0021] Figure 4 This utility model Figure 3 Enlarged view of the structure at point A in the image.

[0022] Legend: 11. Pressure alarm device body; 12. Fixture; 13. Threaded rod; 14. Strain gauge; 15. Through slot; 16. Semiconductor thermostat; 17. First transmission wire; 18. Conductive plate; 19. Support; 21. Temperature conduction wire; 22. Second transmission wire; 23. Third transmission wire; 24. Data dial; 25. Warning light. Detailed Implementation

[0023] This application provides a pressure alarm device for a natural gas storage device, effectively solving the technical problem of inaccurate measurement in existing devices. By setting a stable structure, when the temperature of the conductive plate changes significantly, the semiconductor thermostat will be activated and change the temperature of the conductive plate through the first transmission wire. The conductive plate then transmits the cold temperature to the strain gauge through the temperature conduction wire, thereby keeping the strain gauge at a constant temperature. This effectively avoids the impact of temperature changes on the measurement accuracy of the strain gauge, greatly improving the accuracy of pressure measurement. Furthermore, by using two temperature conduction wires to transmit the temperature of the conductive plate to the strain gauge, and using flexible wires for temperature transmission, the influence of traditional mechanical connections on the conductive plate can be avoided, further improving accuracy.

[0024] Example

[0025] like Figure 1 - Figure 4 As shown, the technical solution in this application embodiment effectively solves the technical problem of inaccurate measurement in existing devices. The overall idea is as follows:

[0026] To address the problems existing in the prior art, this utility model provides a pressure alarm device for a natural gas storage device, including a pressure alarm device body 11, a fixed frame 12 at the lower end of the pressure alarm device body 11, a strain gauge pressure sensor, a temperature sensor and a PCB board (the PCB board is used to complete automated control) inside the fixed frame 12, a threaded rod 13 at the lower end of the fixed frame 12, a strain gauge 14 at the lower end of the threaded rod 13, a through groove 15 inside the threaded rod 13, and a stabilizing structure threadedly installed at the lower end of the fixed frame 12.

[0027] The stable structure includes a semiconductor thermostat 16, with first transmission wires 17 symmetrically arranged at the lower end of the semiconductor thermostat 16, a conductive plate 18 between the two first transmission wires 17, and a bracket 19 at the lower end of the semiconductor thermostat 16.

[0028] By setting a stable structure, when the temperature of the conductive plate 18 changes significantly, the semiconductor thermostat 16 will be activated and change the temperature of the conductive plate 18 through the first transmission wire 17. The conductive plate 18 then transmits the cold temperature to the strain gauge 14 through the temperature transmission line 21, thereby keeping the strain gauge 14 at a constant temperature. This effectively avoids the impact of temperature changes on the measurement accuracy of the strain gauge 14 and greatly improves the accuracy of pressure measurement.

[0029] The conductive plate 18 is located inside the bracket 19. The bracket 19 is fixedly installed with the conductive plate 18. Temperature conductive lines 21 are symmetrically fixedly installed at the lower end of the conductive plate 18. Both temperature conductive lines 21 are fixedly installed with the strain gauge 14. Both temperature conductive lines 21 can transfer the temperature of the conductive plate 18 to the strain gauge 14.

[0030] By using two temperature conduction wires 21 to transfer the temperature of the conduction plate 18 to the strain gauge 14, the use of flexible wires for temperature transfer avoids the other effects on the conduction plate 18 caused by traditional mechanical connections, thereby further improving accuracy.

[0031] The upper end of the strain gauge 14 is provided with a second transmission wire 22, which is connected to the strain pressure sensor inside the fixture 12. The upper end of the strain gauge 14 is fixedly installed with a third transmission wire 23, which is connected to the temperature sensor. The third transmission wire 23 can transmit the current temperature of the strain gauge 14 to the temperature sensor.

[0032] The pressure alarm device body 11 has a data dial 24 on its surface and a warning light 25 on its upper end. The warning light 25 can change between three colors: red, green and yellow.

[0033] By setting the data dial 24, the current status of natural gas pressure can be understood. By setting the warning light 25, staff can intuitively understand the internal condition of the natural gas storage equipment.

[0034] Working principle: When using the natural gas pressure alarm device, the operator must first perform the installation operation. Using the threaded rod 13, the pressure alarm device body 11 is securely installed on the natural gas storage equipment. After installation, the power supply to the pressure alarm device body 11 is turned on to put it into working state. When the device is powered on, the pressure inside the natural gas storage equipment acts on the strain gauge 14, causing it to deform to a certain extent. According to the strain effect of the material, the resistance of the strain gauge 14 will change with the deformation. These changes are transmitted to the strain pressure sensor through the second transmission wire 22. After receiving the data, the strain pressure sensor performs a series of signal processing and calculations to complete the accurate measurement of the pressure inside the natural gas storage equipment.

[0035] Secondly, the device also has the function of monitoring and controlling the temperature of strain gauge 14. The third transmission line 23 is responsible for transmitting the real-time temperature data of strain gauge 14 to the temperature sensor. The temperature sensor has a reasonable threshold preset inside (this threshold is determined according to the ambient temperature at which strain gauge 14 can maintain the most stable working state). When the temperature sensor detects that the temperature of strain gauge 14 exceeds the set threshold, the semiconductor thermostat 16 will be automatically activated. After the semiconductor thermostat 16 is activated, it changes the temperature of the conductive plate 18 through the first transmission line 17. The conductive plate 18 then transmits the cold temperature to strain gauge 14 through the temperature conduction line 21, so that strain gauge 14 is always maintained at a constant temperature. In this way, the measurement accuracy of strain gauge 14 can be effectively avoided due to temperature changes, and the accuracy of pressure measurement is greatly improved.

[0036] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A pressure alarm device of a natural gas storage device, comprising a pressure alarm device body (11), a fixing frame (12) is arranged at the lower end of the pressure alarm device body (11), a strain pressure sensor, a temperature sensor and a PCB board are arranged in the fixing frame (12), characterized in that, The lower end of the fixing frame (12) is provided with a threaded rod (13), the lower end of the threaded rod (13) is provided with a strain sheet (14), the inside of the threaded rod (13) is provided with a through slot (15), and the lower end of the fixing frame (12) is screw-mounted with a stabilizing structure; The stabilizing structure comprises a semiconductor thermostat (16), the lower end of the semiconductor thermostat (16) is symmetrically provided with a first transmission wire (17), a conducting sheet (18) is arranged between the two first transmission wires (17), and the lower end of the semiconductor thermostat (16) is provided with a bracket (19); Wherein, the conducting sheet (18) is located inside the bracket (19), and the bracket (19) and the conducting sheet (18) are fixedly installed.

2. A pressure alarm for a natural gas storage device as defined in claim 1, wherein The lower end of the conducting sheet (18) is symmetrically fixedly installed with a temperature conducting wire (21), and the two temperature conducting wires (21) are fixedly installed with the strain sheet (14); Wherein, the two temperature conducting wires (21) can transmit the temperature of the conducting sheet (18) to the strain sheet (14).

3. A pressure alarm for a natural gas storage device as defined in claim 2, wherein The upper end of the strain sheet (14) is provided with a second transmission wire (22); Wherein, the second transmission wire (22) is connected with the strain pressure sensor inside the fixing frame (12).

4. A pressure alarm device for a natural gas storage installation as claimed in claim 3, characterized in that The upper end of the strain sheet (14) is fixedly installed with a third transmission wire (23); Wherein, the third transmission wire (23) is connected with the temperature sensor.

5. A pressure alarm for a natural gas storage device as defined in claim 4, wherein The third transmission wire (23) can transmit the current temperature of the strain sheet (14) to the temperature sensor. Wherein, the surface of the pressure alarm device body (11) is provided with a data dial (24).

6. A pressure alarm for a natural gas storage device as defined in claim 5, wherein The upper end of the pressure alarm device body (11) is provided with a warning light (25); Wherein, the warning light (25) can change red, green and yellow.

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