A gas pressure detection alarm device

Abstract

This utility model discloses a gas pressure detection and alarm device, including a housing, an electric switch, a connecting pipe, a gas pressure sensor, a gas outlet switch, a speaker, and a PLC system. The electric switch and the gas pressure sensor are installed inside the rear end of the housing. One end of the connecting pipe is connected to an external gas pipe, and the other end passes through the upper end of the housing and connects to the electric switch. One end of the gas pressure sensor is connected to the electric switch through the connecting pipe, and the other end of the gas pressure sensor is equipped with the gas outlet switch. The speaker is installed at the upper end of the housing, and the PLC system is installed at the front end of the housing. The electric switch, gas pressure sensor, and speaker are respectively connected to the PLC system via wires. By setting up the PLC system, gas pressure sensor, alarm module, and speaker, the device can detect whether the gas pressure delivered from the gas storage facility to the detection chamber meets the standard, and then broadcast an alarm through the PLC system.

Description

Technical Field

[0001] This utility model relates to the field of pressure detection technology, and in particular to a gas pressure detection alarm device. Background Technology

[0002] Because the gas storage facility in the factory supplies gas to a large number of testing rooms and work areas, the gas pressure in the later testing rooms or work areas is low, resulting in less gas being delivered or not being delivered at all. Since the testing rooms are unaware of the low gas pressure, the gas samples taken for testing are inaccurate, increasing the difficulty of testing and requiring more tests. Utility Model Content

[0003] The purpose of this application is to provide a gas pressure detection alarm device, which has the advantages of accurately and effectively announcing when the gas pressure reaches the detection pressure standard and reminding when the pressure is low and does not meet the detection standard.

[0004] This application provides a gas pressure detection alarm device, including a housing, an electric switch, a connecting pipe, a gas pressure sensor, a gas outlet switch, a speaker, and a PLC system. The electric switch and the gas pressure sensor are installed inside the rear end of the housing. One end of the connecting pipe is connected to an external gas pipe, and the other end of the connecting pipe passes through the upper end of the housing and is connected to the electric switch. One end of the gas pressure sensor is connected to the electric switch through the connecting pipe, and the other end of the gas pressure sensor is equipped with the gas outlet switch. The speaker is installed at the upper end of the housing, and the PLC system is installed at the front end of the housing. The electric switch, the gas pressure sensor, and the speaker are respectively connected to the PLC system for control via wires.

[0005] Furthermore, the enclosure includes an outer shell, a lid, a lid hinge, an air inlet, an air outlet, a pressure gauge hole, and a speaker mounting hole. The air inlet is located in the middle of the upper end of the outer shell, the air outlet is located at the right end of the outer shell, the speaker mounting hole is located on one side of the upper end of the outer shell, the pressure gauge hole is located on the lid, and the left side of the lid is rotatably connected to the left front end of the outer shell via the lid hinge.

[0006] Furthermore, the box body is also provided with a lock body, which consists of a lock cylinder, a lock tongue and a lock buckle. The lock cylinder passes through one side of the box cover and is connected to the lock tongue, and the lock buckle is located inside the right side of the box body.

[0007] Furthermore, the alarm device also includes a barometer, one end of which is connected to the other end of the barometer sensor, and the surface of the barometer is flush with the surface of the cover, fitting snugly against the barometer hole.

[0008] Furthermore, the alarm device is also equipped with a gas storage chamber, which consists of a gas tank and a gas valve. The gas tank is connected to the gas valve, one end of the gas valve is connected to the other end of the pressure gauge, and the other end of the gas valve is connected to the gas pipe switch.

[0009] Furthermore, the gas cylinder consists of a cylinder body and a gas cylinder opening, the cylinder body is sealed on all sides, and the gas cylinder opening is located at one end of the cylinder body.

[0010] Furthermore, the gas valve includes a valve body, a can opening connector, an outlet nozzle, an inlet nozzle, and a vent valve. The can opening connector is located at the lower end of the valve body and is connected to the gas can opening. The inlet nozzle is located at one end of the valve body and is connected to the other end of the pressure gauge via a connecting pipe. The outlet nozzle is located at the other end of the valve body and is connected to the gas pipe switch via a connecting pipe. The vent valve is located at the upper end of the valve body.

[0011] Furthermore, the electric switch is provided with an air inlet and an air outlet. The air inlet is connected to an external air pipe through the other end of a connecting pipe, and the air outlet is connected to the air pressure sensor through the connecting pipe. The electric switch is connected to the PLC system for control via a power cord.

[0012] Furthermore, the PLC system comprises a host, a display screen, a memory, an input / output interface, a power module, an expansion module, a control module, a broadcast module, and a sensing module. The display screen is mounted on the surface of the host, the input / output interface is located on one side of the host and connected to the control module, and the memory, the power module, the expansion module, the broadcast module, and the sensing module are respectively connected to the control module.

[0013] Furthermore, the sensing module is connected to the air pressure sensor via a power cord, the broadcasting module is connected to the speaker via a power cord, and the control module is connected to the electric air valve via a power cord.

[0014] The beneficial effects of this utility model are: A pressure sensor can be installed to detect whether the pressure of the gas supplied from the gas storage facility to the detection chamber meets the standard. Setting up a gas storage chamber allows for the storage of a certain amount of coal gas before testing, so that samples can be taken directly when testing is required.

[0015] The alarm module can transmit data on whether the standard has been met to the alarm module via the control module, which then controls the speaker to broadcast the alarm.

[0016] The PLC system is configured to control electric switches, pressure sensors, or speakers. When the air pressure reaches or fails to reach the detection standard, the PLC system uses pressure sensor data analysis to broadcast relevant information. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the alarm device.

[0018] Figure 2 This is a schematic diagram of the box structure.

[0019] Figure 3 This is a schematic diagram of the gas storage chamber structure.

[0020] Figure 4 This is a schematic diagram of a PLC system control.

[0021] Attached diagram descriptions: 1. Cabinet; 101. Outer shell; 102. Cabinet lid; 103. Cabinet lid hinge; 104. Air inlet; 105. Air outlet; 106. Pressure gauge hole; 107. Speaker mounting hole; 2. Lock body; 201. Lock cylinder; 202. Lock tongue; 203. Locking buckle; 3. Electric switch; 301. Air inlet; 302. Air outlet; 4. Connecting pipe; 5. Pressure sensor; 6. Pressure gauge; 7. Air outlet switch; 8. Speaker; 9. 901. PLC system; 902. Main unit; 903. Control module; 904. Broadcast module; 905. Sensor module; 906. Display screen; 907. Memory; 908. Input / output interface; 909. Power supply module; 10. Gas storage chamber; 1001. Gas tank; 1002. Gas tank opening; 1003. Tank body; 1004. Gas valve; 1005. Tank opening connector; 1006. Air inlet; 1007. Air outlet; 1008. Vent valve. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] The terms "first," "second," "front end," "rear end," "left side," "right side," or "one side" used in this utility model to refer to numbers or ordinal numbers are for descriptive purposes only and should not be construed as explicitly or implicitly indicating relative importance or specifying the number of indicated technical features. Therefore, a feature defined with "first," "second," "front end," "rear end," "left side," "right side," or "one side" may explicitly or implicitly include at least one of those features.

[0024] In order to solve the technical problems in the prior art, the present invention will be further described in conjunction with the accompanying drawings and embodiments: As shown in the figure, this utility model discloses a gas pressure detection alarm device, including a housing 1, an electric switch 3, a connecting pipe 4, a gas pressure sensor 5, a gas outlet switch 7, a speaker 8, and a PLC system 9. The electric switch 3 and the gas pressure sensor 5 are installed inside the rear end of the housing 1. One end of the connecting pipe 4 is connected to an external gas pipe, and the other end of the connecting pipe 4 passes through the upper end of the housing 1 and is connected to the electric switch 3. One end of the gas pressure sensor 5 is connected to the electric switch 3 through the connecting pipe 4, and the other end of the gas pressure sensor 5 is equipped with a gas outlet switch 7. The speaker 8 is installed at the upper end of the housing 1, and the PLC system is installed at the front end of the housing 1. The electric switch 3, the gas pressure sensor 5, and the speaker 8 are respectively connected to the PLC system for control by wires.

[0025] To elaborate further, the enclosure 1 refers to the carrier in which all components are assembled. Enclosure 1 can be made of metallic or non-metallic materials. Metallic materials include cold-rolled steel plates, stainless steel, or aluminum alloys, while non-metallic materials include ABS, PC, or SMC. Cold-rolled steel plates can be formed by bending or stamping. After enclosure 1 is formed, an insulating material, such as glass fiber reinforced polyester, needs to be sprayed onto its outer surface, providing anti-aging, flame-retardant, and low-cost properties. The electric switch 3 refers to a component that automatically opens or closes via a power control system. It can be an electric gate valve, a pneumatic valve, or an electric air valve. An electric air valve is preferred as it better complements the PLC system's control switch, offering full pressure range control and high accuracy. Due to the low ignition rate of gas, using an air valve is safer. When the PLC system's control power is off, the electric air valve is open; when the electric air valve is energized, it is closed. Connecting pipe 4 refers to the pipe that transports gas into the equipment. Connecting pipe 4 can be made of stainless steel corrugated hose, galvanized steel pipe, or steel-plastic composite pipe, etc. Using stainless steel corrugated hose as connecting pipe 4 is low-cost and has advantages such as corrosion resistance, high temperature resistance, aging resistance, long service life, good flexibility, and easy installation and angle adjustment. Pressure sensor 5 refers to the sensor connected between the gas pipes to detect gas delivery, transmitting the detected pressure data to the detection module for analysis. Gas outlet switch 7 refers to the switch connected to the gas pipe. During sampling, gas outlet switch 7 is opened to extract gas. Gas outlet switch 7 is a manual switch and can be a ball valve, plug valve, or gate valve. A plug valve is preferred due to its simple structure, easy maintenance, and suitability for frequent operation. Speaker 8 refers to the instruction broadcasting element given by the PLC system after detection and analysis. An electric speaker 8 can be used, where a coil vibrates in a magnetic field, driving a diaphragm to produce sound. It is low-cost, simple in structure, and provides stable audio. PLC system 9 refers to a programmable control element that stores instructions and controls equipment operation by embedding functional codes to perform logic control, sequential control, timing, counting, and arithmetic operations. PLC system 9 has a CPU, memory 906, input / output interface 907, power supply module 908, expansion module, electric switch 3, speaker 8 or pressure sensor 5, which are connected to the PLC system through input / output interface 907 for control.

[0026] Furthermore, the enclosure 1 includes an outer shell 101, a cover 102, a cover pivot 103, an air inlet 104, an air outlet 105, a pressure gauge hole 106, and a speaker mounting hole 107. The air inlet 104 is located in the middle of the upper end of the outer shell 101, the air outlet 105 is located at the right end of the outer shell 101, the speaker mounting hole 107 is located on one side of the upper end of the outer shell 101, and the pressure gauge hole 106 is located on the cover 102. The left side of the cover 102 is rotatably connected to the left front end of the outer shell 101 via the cover pivot 103.

[0027] To further explain, the outer casing 101 refers to the outer casing 101 of the housing 1. The outer casing 101 is rectangular and is mounted on the wall through internal screw holes. The outer casing 101 serves as the carrier for assembling various components and is provided with mounting holes for each component. For example, the air inlet hole 104 penetrates into the outer casing 101 from the middle of its upper end, the air outlet hole 105 penetrates into the outer casing 101 from its right end, and the speaker mounting hole 107 penetrates into the outer casing 101 from one side of its upper end. Each mounting hole can be integrally stamped during the stamping of the outer shell 101, or it can be formed by drilling after the outer shell 101 is folded and formed. The lower end of the cover shaft 103 is fixed at the front left side of the outer shell 101, and the left side of the cover 102 is fixed to the upper end of the cover shaft 103, which is offset from the lower end of the cover shaft 103. This allows the cover 102 to be rotated open or the rear end of the cover 102 to be closed by fitting against the front end of the outer shell 101. The lock cover is the same size and shape as the outer wall of the outer shell 101.

[0028] Furthermore, the box body 1 is also provided with a lock body 2, which consists of a lock cylinder 201, a lock tongue 202 and a lock buckle 203. One end of the lock buckle 203 is located inside the right side of the box body 1. The lock cylinder 201 passes through the right side of the box cover 102 and is fixedly connected to one end of the lock tongue 202. The other end of the lock tongue 202 is close to one end of the lock buckle 203. The front end of the lock tongue 202 is fitted and connected to the rear end of the lock buckle 203.

[0029] To further explain, the lock body 2 can be a leaf lock, padlock, or triangular lock. Since the equipment is installed indoors, a triangular lock is preferred. The keyhole at the other end of the lock cylinder 201 is an equilateral triangle, and the matching key head is an equilateral triangular prism. After inserting into the other end of the lock cylinder 201, it is rotated to unlock. One end of the lock cylinder 201 has a toothed protrusion, and the middle of the lock cylinder 201 has a threaded hole. The lock body 2 and the key are made of copper or stainless steel, with a nickel-plated surface for rust prevention, suitable for both indoor and outdoor environments. One end of the latch 202 has a toothed mounting hole. After the latch 202 is fitted onto the toothed protrusion at one end of the lock cylinder 201, it is fixed with screws. When the lock cylinder 201 is rotated, the latch 202 rotates clockwise to the closed state, causing the latch 202 to be stuck behind the latch 203, preventing the cover 102 from being opened. When the lock cylinder 201 is rotated, the latch 202 rotates counterclockwise to the open state, causing the latch 202 to move away from behind the latch 203, at which point the cover 102 can be opened. The latch 203 is a metal sheet, one end of which is welded to the right side of the outer casing 101 at the position corresponding to the latch 202.

[0030] Furthermore, the alarm device also includes a barometer 6, one end of which is connected to the other end of the barometer 5, and the surface of the barometer 6 is flush with the surface of the cover 102, fitting snugly against the hole 106 of the barometer 6.

[0031] To further explain, the pressure gauge 6 refers to the element installed on the pipeline to detect gas pressure. The pressure gauge 6 can be a conventional mechanical pointer type. It is mainly used to observe the pressure data of the pressure gauge 6 when the PLC system is not working to determine whether the amount of gas has reached the detection standard. The surface of the pressure gauge 6 needs to be set at the same height as the surface of the box cover 102.

[0032] Furthermore, the alarm device is also equipped with an air storage chamber 10. All air storage chambers 10 consist of an air tank 1001 and an air valve 1004. The air tank 1001 is connected to the air valve 1004. One end of the air valve 1004 is connected to the other end of the air pressure gauge 6, and the other end of the air valve 1004 is connected to the air pipe switch.

[0033] To further explain, the gas storage chamber 10 refers to a container for collecting coal gas, consisting of a gas cylinder 1001 and a gas valve 1004. The gas cylinder 1001 is the body 1003 of the gas storage chamber 10. The gas cylinder 1001 can be round, square, or polygonal, and can be made of metal materials, such as stainless steel, and then coated with an insulating varnish to prevent electrical contact with the gas cylinder 1001 from causing an explosion or fire. Furthermore, the gas cylinder 1001 consists of a cylinder body 1003 and a gas cylinder opening 1002. The cylinder body 1001 is sealed on all four sides, and the gas cylinder opening 1002 is located at one end of the cylinder body 1003. Due to the small size of the gas cylinder opening 1002, the gas cylinder 1001 needs to be divided into two sections and spliced ​​together. The cylinder body 1003 is stamped out of stainless steel, and the bottom of the cylinder body 1003 is integrally stamped with the surrounding seal. Then, the gas filling section is seamlessly welded to the opening position at the top of the cylinder body 1003. The gas cylinder opening 1002 is provided with internal threads so that the gas valve 1004 can be threadedly connected to the gas cylinder opening 1002, which improves the airtightness. When the gas enters the gas cylinder 1001, in addition to reducing the gas pressure, it can also store gas for testing.

[0034] Furthermore, the air valve 1004 includes a valve body, a can opening connector 1005, an air outlet 1007, an air inlet 1006, and a vent valve 1008. The air valve 1004 can be made of metal materials, such as stainless steel or copper, to improve the hardness and airtightness of the air valve 1004. The canister connector 1005 is located at the lower end of the valve body and is threadedly connected to the gas canister opening 1002. The gas inlet 1006 is located at one end of the valve body and is connected to the other end of the pressure gauge 6 via the connecting pipe 4. The gas outlet 1007 is located at the other end of the valve body and is connected to the gas pipe switch via the connecting pipe 4. A vent pipe is installed between the upper and lower ends of the gas valve 1004 to separate the gas outlet 1007 and the gas inlet 1006. When gas enters the gas canister 1001 from the gas inlet 1006, the pressure at the gas outlet 1007 is reduced. The vent valve 1008 is located at the upper end of the valve body and is connected to the vent pipe. When the gas pressure is too high, the vent valve 1008 is opened to release gas.

[0035] Furthermore, the electric switch 3 is provided with an air inlet 301 and an air outlet 302. The air inlet 301 is connected to the external air pipe through the other end of the connecting pipe 4, and the air outlet 302 is connected to the air pressure sensor 5 through the connecting pipe 4. The electric switch 3 is connected to the PLC system for control through a power cord.

[0036] Electric switch 3 uses an electric gas valve to prevent the power supply from touching the gas and causing an accident. The gas storage is connected to the gas inlet 301 through the connecting pipe 4, and the gas outlet 302 is connected to other components through the connecting pipe 4. When the electric gas valve is in the de-energized state, the switch is open and the gas flows to the gas outlet switch 7. When the electric gas valve is in the energized state, it is turned on and off, and the gas is trapped in the electric gas valve switch.

[0037] Furthermore, the PLC system 9 consists of a host 901, a display screen 905, a memory 906, an input / output interface 907, a power supply module 908, an expansion module, a control module 902, a broadcast module 903, and a sensor module 904. The display screen 905 is mounted on the surface of the host 901. Several input / output interfaces 907 are located on one side of the host 901 and connected to the control module 902. The memory 906, power supply module 908, expansion module, control module 902, broadcast module 903, and sensor module 904 are respectively connected to the control module 902. The air pressure sensor 5 is connected to the sensor module 904 via a power cable. The speaker 8 is connected to the broadcast module 903 via a power cable. The electric air valve is connected to the control module 902 via a power cable.

[0038] The host 901 serves as the carrier for all control elements, which are interconnected to receive or output control commands. The memory 906 stores user-written control programs, commands, or ladder diagrams. The input / output interface 907 receives signals from external devices and converts them into electrical signals that the CPU can recognize. For example, the pressure sensor and speaker 8 are connected to the broadcast module 903 and the sensing module 904 through the input / output interface 907, and then to the control module 902. The control module 902 identifies the model of each component and matches the operating commands.

[0039] The gas from the gas storage room is delivered to the testing room. The gas pipe of the gas storage room is connected to the connecting pipe 4. The connecting pipe 4 passes through the box 1 and connects to the inlet 301 of the electric gas valve. The outlet 302 is connected to the pressure sensor 5 through the connecting pipe 4. The pressure sensor 5 is connected to the pressure gauge 6. The pressure gauge 6 is connected to the gas valve 1004 of the gas storage room 10. The gas valve 1004 is then connected to the outlet pipe switch 7. The pressure sensor 5, the speaker 8, or the electric gas valve are connected to the input / output interface 907 through the power cord. The input / output interface 907 is connected to the sensing module 904, the broadcast module 903, or the control module 902. The PLC system control module 902 identifies each component and displays it on the display screen 905. The gas pressure standard is set in the storage device. When the gas enters the broadcasting equipment in the detection chamber, the electric gas valve is de-energized, and the gas can continue to flow to the gas outlet switch 7. When the pressure sensor detects that the gas pressure has reached the detection standard, the PLC system receives the signal and sends an instruction to the broadcasting module 903 to control the speaker 8 to broadcast (gas pressure meets the standard). At this time, sampling and testing can be performed. When the pressure sensor detects that the gas pressure has not reached the detection standard, the PLC system receives the signal and sends an instruction to the broadcasting module 903 to control the speaker 8 to broadcast (gas pressure does not meet the standard). At this time, sampling and testing cannot be performed. When the gas pressure is not up to standard for the first time, wait for the gas to enter the gas storage chamber 10. When the gas storage chamber 10 is full, the gas pressure is high, and the pressure gauge displays the pressure index. Observe whether the index meets the standard and whether to take a sample for testing. At the same time, the pressure sensor transmits a signal to the PLC system for analysis. The PLC system receives the signal and controls the speaker 8 to broadcast again to the broadcast module 903 (gas pressure meets the standard). At this time, a sample can be taken for testing. If the gas outlet switch 7 does not open to take gas after 5 minutes, the PLC system powers on the electric gas valve to close the gas outlet 302 of the gas pipe to prevent gas backflow.

[0040] In summary, any other corresponding modifications made by those skilled in the art after reading this utility model document, based on the technical solution and concept of this utility model without creative mental effort, shall all fall within the scope of protection of this utility model.

Claims

1. A gas pressure detection alarm device characterized by comprising: The device includes a housing, an electric switch, a connecting pipe, a pressure sensor, an exhaust pipe switch, a speaker, and a PLC system. The electric switch and the pressure sensor are installed inside the rear end of the housing. One end of the connecting pipe is connected to an external air pipe, and the other end of the connecting pipe passes through the upper end of the housing and is connected to the electric switch. One end of the pressure sensor is connected to the electric switch through the connecting pipe, and the other end of the pressure sensor is equipped with the exhaust pipe switch. The speaker is installed at the upper end of the housing, and the PLC system is installed at the front end of the housing. The electric switch, the pressure sensor, and the speaker are respectively connected to the PLC system for control via wires.

2. The gas pressure detection alarm apparatus according to claim 1, wherein The enclosure includes an outer shell, a lid, a lid hinge, an air inlet, an air outlet, a pressure gauge hole, and a speaker mounting hole. The air inlet is located in the middle of the upper end of the outer shell, the air outlet is located at the right end of the outer shell, the speaker mounting hole is located on one side of the upper end of the outer shell, the pressure gauge hole is located on the lid, and the left side of the lid is rotatably connected to the left front end of the outer shell via the lid hinge.

3. The gas pressure detection alarm apparatus according to claim 2, wherein The box is also equipped with a lock body, which consists of a lock cylinder, a lock tongue, and a lock buckle. The lock cylinder passes through one side of the box cover and is connected to the lock tongue, and the lock buckle is located inside the right side of the box.

4. The gas pressure detection alarm apparatus according to claim 2, wherein The alarm device also includes a barometer, one end of which is connected to the other end of the barometer, and the surface of the barometer is flush with the surface of the cover, fitting snugly against the barometer hole.

5. The gas pressure detection alarm apparatus according to claim 4, wherein The alarm device is also equipped with a gas storage chamber. All gas storage chambers consist of gas cylinders and gas valves. The gas cylinders are connected to the gas valves. One end of the gas valve is connected to the other end of the pressure gauge, and the other end of the gas valve is connected to the gas pipe switch.

6. The gas pressure detection alarm apparatus according to claim 5, wherein The gas cylinder consists of a cylinder body and a gas cylinder opening. The gas cylinder body is sealed on all four sides, and the gas cylinder opening is located at one end of the gas cylinder body.

7. The gas pressure detection alarm apparatus according to claim 5, wherein The gas valve includes a valve body, a can opening connector, an outlet nozzle, an inlet nozzle, and a vent valve. The can opening connector is located at the lower end of the valve body and is connected to the gas can opening. The inlet nozzle is located at one end of the valve body and is connected to the other end of the pressure gauge via a connecting pipe. The outlet nozzle is located at the other end of the valve body and is connected to the gas pipe switch via a connecting pipe. The vent valve is located at the upper end of the valve body.

8. The gas pressure detection alarm apparatus according to claim 1, wherein The electric switch has an air inlet and an air outlet. The air inlet is connected to an external air pipe through the other end of a connecting pipe, and the air outlet is connected to the air pressure sensor through the connecting pipe. The electric switch is connected to a PLC system for control via a power cord.

9. The gas pressure detection and alarm device according to claim 1, characterized in that, The PLC system consists of a host, a display screen, a memory, an input / output interface, a power module, an expansion module, a control module, a broadcast module, and a sensing module. The display screen is mounted on the surface of the host, the input / output interface is located on one side of the host and connected to the control module, and the memory, the power module, the expansion module, the broadcast module, and the sensing module are respectively connected to the control module.

10. The gas pressure detection and alarm device according to claim 9, characterized in that, The sensing module is connected with the air pressure sensor through a power line, the broadcasting module is connected with the speaker through a power line, and the control module is connected with the electric air valve through a power line.

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