Integrated pressure gas alarm

Abstract

The utility model discloses an integrated pressure gas alarm which comprises a storage tank, a gas supplementing pipe is fixedly arranged on one side of the upper end of the storage tank, a gas outlet pipe is arranged at the position, on one side of the gas supplementing pipe, of the upper end of the storage tank, and a detection mechanism used for detecting gas pressure in the storage tank is arranged in the middle of the upper end of the storage tank. The detection mechanism comprises a first cavity, a piston, an extrusion rod, a shell, a rotating shaft, a lever, a pressure detection device and a strain gauge, the first cavity is fixedly formed in the middle of the upper end of the storage tank, the piston is movably clamped in the first cavity, and the extrusion rod is fixedly arranged at the upper end of the piston. The pressure detection device is used for monitoring the pressure change of the gas in the storage tank to judge whether the gas in the storage tank leaks or not, so that whether the gas in the storage tank needs to be supplemented or not can be known, whether the gas leaks or not can be judged, multiple purposes are achieved, and use is convenient.

Description

Technical Field

[0001] This utility model relates to the field of gas alarm technology, specifically an integrated pressure gas alarm. Background Technology

[0002] A gas alarm is a device used to detect the concentration of combustible gases (such as natural gas, liquefied petroleum gas, carbon monoxide, etc.) in the environment and sound an alarm when the concentration exceeds a safe threshold. Its working principle is based on gas sensing technology, such as the principle of semiconductor sensors: based on the change in conductivity of semiconductor materials (such as tin oxide) when in contact with combustible gases, resulting in a change in resistance; and the principle of infrared sensors: measuring the concentration by detecting the absorption characteristics of combustible gases to specific infrared light.

[0003] In existing technologies, such gas alarm devices can only detect gas leaks, but cannot monitor the gas pressure inside the storage tank in real time as needed, and issue a gas replenishment request when the gas pressure inside the storage tank decreases (gas becomes less). Therefore, an integrated pressure gas alarm is needed to address this issue. Utility Model Content

[0004] The purpose of this invention is to provide an integrated pressure gas alarm to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an integrated pressure gas alarm, comprising a storage tank, a gas supply pipe fixedly installed on one side of the upper end of the storage tank, a gas outlet pipe installed on one side of the gas supply pipe at the upper end of the storage tank, and a detection mechanism for detecting the internal gas pressure of the storage tank installed in the middle of the upper end of the storage tank. The detection mechanism includes a first cavity, a piston, a compression rod, a housing, a rotating shaft, a lever, a pressure detection device, and a strain gauge. The first cavity is fixedly installed in the middle of the upper end of the storage tank, and a piston is movably engaged inside the first cavity. A compression rod is fixedly installed on the upper end of the piston. A housing is fixedly installed on the upper end of the first cavity, and a rotating shaft is installed on one side inside the housing. A lever is fixedly installed on the surface of the rotating shaft. A pressure detection device is fixedly installed on one side inside the housing, and a strain gauge is fixedly installed on the upper end of the pressure detection device.

[0006] Preferably, a first control valve is provided between the gas supply pipe and the storage tank, and a second control valve is provided between the gas outlet pipe and the storage tank. The operation of the gas supply pipe and the gas outlet pipe can be controlled by the first control valve and the second control valve.

[0007] Preferably, a rubber diaphragm is fixedly provided inside the first cavity at the lower end of the piston. The rubber diaphragm can further improve the sealing performance of the piston and prevent leakage at the piston.

[0008] Preferably, a wire is fixedly provided on one side of the housing, through which a control box, an alarm or other electronic control components can be connected, and the detection values ​​of the pressure detection device and the temperature detection device can be transmitted.

[0009] Preferably, a second cavity is provided on one side of the first cavity, and a temperature detection device is provided at the lower end of the second cavity.

[0010] Preferably, a pressure gauge is fixedly installed on one side of the upper end of the storage tank. In addition to using a pressure detection device to monitor the air pressure inside the storage tank, this device is also equipped with a pressure gauge for detection, which makes it convenient for staff to judge the air pressure inside the storage tank on site.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. This utility model uses a pressure detection device to monitor changes in the gas pressure inside the storage tank to determine whether there is a gas leak inside the storage tank. This not only tells us how much gas is left in the storage tank and whether it needs to be replenished, but also determines whether there is a gas leak, which is convenient to use and has multiple benefits.

[0013] 2. In the alarm process of this utility model, the gas pressure monitoring value is required to be relatively sensitive. Therefore, this device also incorporates the lever principle. When the gas pressure inside the storage tank pushes the rubber diaphragm and piston upward, it will push the main arm to rotate around the pivot, thereby causing the secondary arm to squeeze the strain gauge downward. In this way, the pressure can be increased by using the main arm, so that the pressure detection device can more sensitively monitor the pressure changes inside the storage tank. Even a small leak can still be detected by this device. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the integrated pressure gas alarm of this utility model;

[0015] Figure 2 This is a side view of the integrated pressure gas alarm of this utility model;

[0016] Figure 3 This is an overall structural view of the detection mechanism in the integrated pressure gas alarm of this utility model.

[0017] In the diagram: 1. Storage tank; 2. Gas supply pipe; 3. Gas outlet pipe; 4. First cavity; 5. Piston; 6. Extrusion rod; 7. Housing; 8. Rotating shaft; 9. Lever; 10. Pressure detection device; 11. Strain gauge; 12. First control valve; 13. Second control valve; 14. Rubber diaphragm; 15. Wire; 16. Second cavity; 17. Temperature detection device; 18. Pressure gauge. Detailed Implementation

[0018] 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.

[0019] Please see Figure 1-3 This utility model provides a technical solution: an integrated pressure gas alarm, including a storage tank 1, a gas supply pipe 2 fixedly installed on one side of the upper end of the storage tank 1, a gas outlet pipe 3 installed on one side of the gas supply pipe 2 at the upper end of the storage tank 1, and a detection mechanism for detecting the internal gas pressure of the storage tank 1 installed in the middle of the upper end of the storage tank 1. The detection mechanism includes a first cavity 4, a piston 5, a compression rod 6, a housing 7, a rotating shaft 8, a lever 9, a pressure detection device 10, and a strain gauge 11. The first cavity 4 is fixedly installed in the middle of the upper end of the storage tank 1. The piston 5 is movably engaged inside the first cavity 4. The compression rod 6 is fixedly installed on the upper end of the piston 5. The housing 7 is fixedly installed on the upper end of the first cavity 4. The rotating shaft 8 is installed on one side inside the housing 7. The lever 9 is fixedly installed on the surface of the rotating shaft 8. The pressure detection device 10 is fixedly installed on one side inside the housing 7. The strain gauge 11 is fixedly installed on the upper end of the pressure detection device 10.

[0020] A first control valve 12 is provided between the gas supply pipe 2 and the storage tank 1, and a second control valve 13 is provided between the gas outlet pipe 3 and the storage tank 1. The operation of the gas supply pipe 2 and the gas outlet pipe 3 can be controlled by the first control valve 12 and the second control valve 13.

[0021] A rubber diaphragm 14 is fixedly provided inside the first cavity 4 at the lower end of the piston 5. The rubber diaphragm 14 can further improve the sealing of the piston 5 to prevent leakage at the piston 5.

[0022] A wire 15 is fixedly provided on one side of the housing 7. The wire 15 can be connected to a control box, an alarm or other electronic control components to transmit the detection values ​​of the pressure detection device 10 and the temperature detection device 17.

[0023] A second cavity 16 is provided on one side of the first cavity 4, and a temperature detection device 17 is provided at the lower end of the second cavity 16.

[0024] The temperature detection device 17 of this apparatus is used to correct the detection value of the pressure detection device 10. Since temperature changes cause changes in the pressure detection value of the pressure detection device 10, the temperature detection device 17 is needed for auxiliary correction. Furthermore, this apparatus is used in conjunction with the storage tank 1, thus creating a constant-volume environment. In a constant-volume environment, gas pressure is directly proportional to ambient temperature. According to the ideal gas law PV = nRT, when volume V and amount of substance n are constant, pressure P is directly proportional to temperature T (note that the temperature here should be thermodynamic temperature, in Kelvin K). Therefore, when the pressure detection device 10 detects the pressure inside the storage tank 1... Assuming the initial temperature T1 = 35℃ = 308.15K and the initial pressure P1 = 1 (assuming the unit is standard atmosphere or any unit), the final temperature T2 = 34℃ = 307.15K as the ambient temperature changes. According to the ideal gas law, the relationship between pressure and temperature is: T2P1 = T1P2. Therefore, the measured pressure should be approximately 0.997. Thus, the temperature detection device 17 can be used to correct the pressure detection device 10 to prevent false alarms due to temperature decreases. If the pressure detection device 10 detects that the gas pressure change inside the storage tank 1 does not follow a direct proportional change with temperature, an alarm will be triggered.

[0025] A pressure gauge 18 is fixedly installed on one side of the upper end of the storage tank 1. In addition to using the pressure detection device 10 to monitor the air pressure inside the storage tank 1, this device is also equipped with a pressure gauge for detection, which makes it convenient for staff to judge the air pressure inside the storage tank 1 on site.

[0026] Working principle: When using this device, the pressure detection device 10 monitors the gas pressure inside the storage tank 1, thereby determining how much gas is left inside the storage tank 1. When the gas content inside the storage tank 1 is lower than the threshold, a message can be sent to the control terminal to notify the gas replenishment.

[0027] Furthermore, the pressure detection device 10 of this device can also be used in conjunction with the temperature detection device 17 for leak monitoring. The detection values ​​of the pressure detection device 10 and the temperature detection device 17 are recorded every 10 seconds and compared before and after. If the pressure detection device 10 detects a pressure of 1 and the gas ambient temperature is 35 degrees, and after 10 seconds the pressure detection device 10 detects a pressure of 0.997 and a gas ambient temperature of 34 degrees, no alarm will be triggered. If the temperature is measured to be 35 degrees or 36 degrees, an alarm will be triggered. The alarm principle of this device is that as the temperature changes, the pressure detection device 10 detects that the gas pressure change inside the storage tank 1 does not follow a direct proportional change and is lower than a predetermined value, then sends an electrical signal to trigger an alarm.

[0028] It should be noted that since storage tank 1 is also in the process of storing and retrieving gas, the alarm system does not work when the first control valve 12 or the second control valve 13 is open. When the first control valve 12 and the second control valve 13 are closed, the alarm monitoring process is restarted, the current gas pressure and temperature are recorded again, and the pressure and temperature data are recorded every 10 seconds and compared before and after. In order to prevent data errors from the sensors, an alarm threshold can be set. When the pressure detection device 10 detects that the gas pressure change inside storage tank 1 does not follow a direct proportional change with the temperature and is lower than a predetermined value by 1%, an electrical signal is sent to trigger an alarm.

[0029] Meanwhile, when the device is in the alarm process, the gas pressure monitoring value is required to be relatively sensitive. Therefore, the device also incorporates the lever principle. When the gas pressure inside the storage tank 1 pushes the rubber diaphragm 14 and piston 5 upward, it will push the main arm to rotate around the pivot 8, thereby causing the secondary arm to squeeze the strain gauge 11 downward. In this way, the main arm can increase the pressure, so that the pressure detection device 10 can more sensitively monitor the pressure changes inside the storage tank 1. Even a small leak can still be detected by this device.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0031] 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. An integrated pressure gas alarm, comprising a storage tank (1), characterized in that: A gas supply pipe (2) is fixedly installed on one side of the upper end of the storage tank (1). A gas outlet pipe (3) is installed on one side of the gas supply pipe (2) at the upper end of the storage tank (1). A detection mechanism for detecting the gas pressure inside the storage tank (1) is installed in the middle of the upper end of the storage tank (1). The detection mechanism includes a first cavity (4), a piston (5), a compression rod (6), a shell (7), a rotating shaft (8), a lever (9), a pressure detection device (10), and a strain gauge (11). A gas supply pipe (2) is fixedly installed in the middle of the upper end of the storage tank (1). A first cavity (4) is provided, and a piston (5) is movably engaged inside the first cavity (4). A compression rod (6) is fixedly provided on the upper end of the piston (5). A housing (7) is fixedly provided on the upper end of the first cavity (4). A rotating shaft (8) is provided on one side inside the housing (7). A lever (9) is fixedly provided on the surface of the rotating shaft (8). A pressure detection device (10) is fixedly provided on one side inside the housing (7). A strain gauge (11) is fixedly provided on the upper end of the pressure detection device (10).

2. The integrated pressure gas alarm according to claim 1, characterized in that: A first control valve (12) is provided between the gas supply pipe (2) and the storage tank (1), and a second control valve (13) is provided between the gas outlet pipe (3) and the storage tank (1).

3. The integrated pressure gas alarm according to claim 1, characterized in that: A rubber diaphragm (14) is fixedly installed inside the first cavity (4) at the lower end of the piston (5).

4. The integrated pressure gas alarm according to claim 1, characterized in that: A wire (15) is fixedly installed on one side of the housing (7).

5. The integrated pressure gas alarm according to claim 1, characterized in that: A second cavity (16) is provided on one side of the first cavity (4), and a temperature detection device (17) is provided at the lower end of the second cavity (16).

6. The integrated pressure gas alarm according to claim 1, characterized in that: A pressure gauge (18) is fixedly installed on one side of the upper end of the storage tank (1).

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