CN111968347A - Anti-damage wireless alarm system for gas pipe network - Google Patents

Abstract

The invention discloses an anti-sabotage wireless alarm system for a gas pipeline network, comprising: a gas pipeline, a gate valve, a pressure monitoring and releasing unit, a first lead wire, a second lead wire, a gas pipeline protection board, an alarm signal transmission unit and an acousto-optic alarm; The gas pipeline is provided with a plurality of gate valves at intervals; the left and right ends of the gate valve are respectively provided with pressure monitoring and releasing units; the gas pipeline protection plate is arranged above the gas pipeline; the first wire and the second wire are both arranged above the gas pipeline protection plate The first wire and the second wire are respectively located on the left and right sides of the vertical center line of the gate valve; the first wire and the second wire are respectively connected with the alarm signal transmission unit; the sound and light alarm is connected with the alarm signal transmission unit; when the first wire Or the second wire is disconnected, the sound and light alarm will send out an alarm signal. The invention ensures that an alarm signal is issued at the first time when the gas pipeline is damaged, and emergency repairs are carried out in time.

Description

An anti-destructive wireless alarm system for gas pipeline network

technical field

The invention relates to the technical field of gas pipeline protection, in particular to an anti-damage wireless alarm system for a gas pipeline network.

Background technique

After the underground gas pipeline is laid, the most worrying thing is the third-party construction damage. Although the gas pipeline will be laid with a protective cover plate above the pipeline as a warning and defense against third-party damage, and warning signs will be set up at intervals above the pipeline. However, the gas pipeline will still be damaged. Although the distributed optical fiber vibration sensing system with mature technology can provide early warning, the completed gas pipeline is no longer suitable for excavation and adding an optical cable, and the optical cable should be close to Pipe laying and then excavation and laying will be more troublesome and increase a lot of engineering volume and construction costs. Directional drilling and trenchless pipelines can no longer be repeated for directional drilling and laying optical cables. It is only applicable when the newly constructed pipeline is laid down. However, using this method, it is necessary to lay optical cables from the beginning of the gas pipeline to the end. Some sections of the gas pipeline have adopted the directional drilling trenchless method, and it is no longer possible to increase the construction of optical cables.

SUMMARY OF THE INVENTION

The present invention provides an anti-damage wireless alarm system for a gas pipe network to overcome the above technical problems.

The present invention is an anti-vandal wireless alarm system for a gas pipeline network, comprising: a gas pipeline, a gate valve, a pressure monitoring and releasing unit, a first wire, a second wire, a gas pipeline protection board, an alarm signal transmission unit and an acousto-optic alarm; the The gas pipeline, gate valve, pressure monitoring and releasing unit, the first wire, the second wire and the gas pipeline protection board are all buried below the ground level; the alarm signal transmission unit and the sound and light alarm are located above the ground level; the gas pipeline is divided into two parts. A plurality of the gate valves are arranged at intervals; the pressure monitoring and releasing units are respectively provided at the left and right ends of the gate valve; the gas pipeline protection plate is arranged above the gas pipeline; the first wire and the second wire are arranged above the gas pipeline protection plate; the first and second wires are respectively located on the left and right sides of the vertical centerline of the gate valve; the first and second wires are respectively connected with the alarm signal The transmission unit is connected; the sound and light alarm is connected with the alarm signal transmission unit; when the first wire or the second wire is disconnected, the sound and light alarm sends out an alarm signal.

Further, the pressure monitoring and venting unit includes: a first venting valve, a second venting valve, a stop valve and a pressure transmitter; one end of the first venting valve is connected to one end of the gate valve through a pipeline; The other end connecting pipe of a relief valve is connected in parallel with the connecting pipe at one end of the second relief valve and the shut-off valve through a tee; the other end of the shut-off valve is connected with the pressure transmitter; the pressure transmitter is connected to the The alarm signal transmission unit is connected.

Further, the first wire, the second wire and the gas pipeline protection plate are arranged in parallel with the gas pipeline; the vertical distance between the first wire, the second wire and the gas pipeline protection plate is 0.3-0.5 m; the vertical distance between the first wire, the second wire and the ground plane is 0.3-0.5m.

Further, a wire protection tube is sleeved outside the first wire and the second wire; the wire protection tube is made of polyethylene.

Further, it also includes: a solar power supply unit; the solar power supply unit includes: a solar panel, a solar panel support rod, and a battery distribution box; the solar panel support rod is vertically fixed on the ground plane where the gate valve is embedded the solar panel is fixed on the top of the solar panel support rod; the battery distribution box is fixed on one side of the solar panel support rod; the alarm signal transmission unit is arranged on the other side of the solar panel support rod; The battery distribution box is electrically connected with the alarm signal transmission unit.

Further, it also includes: a control box bracket and a control box; the alarm signal transmission unit is arranged in the control box; the control box bracket is sleeved on the solar panel support rod; the control box and the The control box bracket is fixedly connected; the sound and light alarm is fixedly connected with the control box.

Further, the height of the solar panel pole is 2.5m; the battery distribution box is fixed on one side of the solar panel pole which is 1.3-1.5m away from the ground plane.

Further, at least one video monitoring device is also fixedly connected to the solar panel support rod.

Further, the alarm signal transmission unit is provided with two wireless transmission modules, and the two wireless transmission modules respectively transmit the alarm signal and the pipeline pressure signal to the central control room of the gas company.

In the present invention, two wires are arranged above the gas pipeline, with each section of the valve well as an interval, and each two wires and the alarm system form an alarm circuit. There will be an immediate on-site sound and light alarm. In order to more accurately monitor whether the gas pipeline is damaged, pressure sensing units are installed at both ends of the gate valve in the valve well. By monitoring the pressure change in the gas pipeline to determine whether the gas pipeline is damaged, so as to ensure the first time the gas pipeline is damaged. Send out an alarm signal and carry out emergency repairs in time.

Description of drawings

In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

Fig. 1 is a kind of structural schematic diagram of a gas pipeline network anti-vandal wireless alarm system;

FIG. 2 is a schematic structural diagram of the pressure sensing unit according to the present invention;

3 is a schematic structural diagram of the control box support and the control box according to the present invention;

4 is a schematic structural diagram of the control box fixed connection bracket according to the present invention;

FIG. 5 is a schematic structural diagram of the solar power supply unit according to the present invention.

Description of reference numbers:

1. Gas pipeline; 2. Gate valve; 31. Pressure monitoring and releasing unit; 41. First wire; 42. Second wire; 5. Gas pipeline protection board; 6. Alarm signal transmission unit; 7. Sound and light alarm; 8 , the first relief valve; 9, the second relief valve; 12, the globe valve; 14, the pressure transmitter; 16, the wire protection pipe; 17, the control box bracket; 18, the control box; 19, the solar power supply unit; 191, Solar panel; 192, solar panel pole; 193, battery distribution box; 20, video surveillance equipment.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

This embodiment provides an anti-vandal wireless alarm system for a gas pipeline network. As shown in FIG. 1 , the system is divided into an underground part and an above-ground part, wherein: the underground part includes: a gas pipeline 1 , a gate valve 2 , and a pressure monitoring and venting unit 31 , the second pressure monitoring and releasing unit 32 , the first wire 41 , the second wire 42 and the gas pipeline protection board 5 ;

The gas pipeline 1 is laid in sections, and there is a gate valve 2 that controls the opening and closing of the gas pipeline 1 between each section of the pipeline. The two ends of the gate valve 2 are respectively provided with pressure monitoring and venting units. The function of the pressure monitoring venting unit is to monitor the pressure value in the pipeline. When the pressure of the internal control point exceeds the set value (bubble burst pressure), the blow-off valve can be opened to discharge a certain amount of gas to prevent damage to the pipeline caused by excessive pressure. A layer of gas pipeline protection plate 5 is arranged above the gas pipeline 1 to prevent the gas pipeline 1 from being damaged by heavy objects such as stones. Above the gas pipeline protection plate 5, wires are respectively arranged on both sides of the central axis of each gate valve 2, and the two wires are respectively connected to the alarm signal transmission unit 6 on the ground part, and each two wires and the alarm signal transmission unit 6 form an alarm loop. When any one of the wires is disconnected, the alarm signal transmission unit 6 transmits the signal to the sound and light alarm 7 for alarming.

Each valve well is a protection area, and an alarm signal transmission unit 6 and acousto-optic alarm 7 can also be shared between the upstream and downstream two valve wells. One alarm signal transmission unit 6 can be connected to 1-4 protection area signal lines at the same time. , that is, connect 2-8 wires. The alarm signal transmission unit 6 is provided with an LED light. When the underground wire is damaged, the LED light turns from green to flashing red. At the same time, the sound and light alarm 7 is controlled to circulate voice broadcasts, for example: "Suspected gas pipeline is blocked on site. If there is any damage, please notify the gas company immediately by calling XXXXXXXX. If there is gas leakage, please call the police immediately, and it is forbidden to have a fire source near the damage point.”

The method of comprehensively using the pressure signal and the underground wire alarm signal is as follows:

(1) Since the pressure transmitter of the first protection area and the pressure transmitter of the second protection area belong to the same valve, and the distance between the front and rear is only about one meter, the displayed pressure is basically the same, but it can be alarmed with the alarm wire above the gas pipeline. The signal comprehensively judges whether the gas pipeline network is damaged or leaked.

1. When the alarm signal of the underground wire in the first protection area alarms, and the pressure in the first protection area does not change, it means that there is only a destructive behavior above the pipeline, and the gas pipeline has not been damaged;

2. When the alarm signal of the underground wire in the first protection area alarms, and the pressure in the first protection area and the second protection area drops, it indicates that the gas pipeline in the first protection area has been substantially damaged;

3. If the above-ground man-made damage is not a mechanical or man-made damage directly above the gas pipeline, but a small concept event of directional drilling or ground well drilling, the alarm wire above the gas pipeline can be bypassed to threaten the underground pipeline destroy. In this case, the sudden pressure drop can be used as the basis for judging that the gas pipeline is damaged.

When there is no alarm signal in the underground signal wire of the first protection area, and the pressure of the first protection area and the second protection area drops, it means that the gas pipeline may be damaged, and you need to go to the first protection area and the second protection area. Leak Detection See the cause of pressure drop and leak point. The drop range is compared with the pressure at the outbound side of the gas company, which is determined according to the actual outbound pressure level and output flow. (2) Since the first protection area pressure transmitter and the second protection area pressure transmitter belong to the same valve, the front and rear Only about one meter apart, the displayed pressure is basically the same, but it can be combined with the alarm signal of the alarm wire above the gas pipeline to judge whether the gas pipeline network is damaged or leaked.

1. When the alarm signal of the underground wire in the second protection area is alarmed, and the pressure in the first protection area and the second protection area does not change, it means that only the destructive behavior has occurred above the pipeline in the second protection area, and the gas pipeline has not been damaged;

2. When the alarm signal of the underground wire in the second protection area alarms, and the pressure in the second protection area drops, it means that the gas pipeline in the second protection area has been substantially damaged;

3. If the above-ground man-made damage is not a mechanical or man-made damage directly above the gas pipeline, but a small concept event of directional drilling or ground well drilling, the alarm wire above the gas pipeline can be bypassed to threaten the underground pipeline destroy. In this case, the sudden pressure drop can be used as the basis for judging that the gas pipeline is damaged.

When there is no alarm signal in the underground signal wire of the second protection area, and the pressure of the first protection area and the second protection area drops, it means that the gas pipeline may be damaged, and you need to go to the first protection area and the second protection area. Check to see the cause of pressure drop and leak point.

In this embodiment, the pressure monitoring and venting unit 31 includes: a first venting valve 8, a second venting valve 9, a stop valve 12 and a pressure transmitter 14; one end of the first venting valve 8 is connected to one end of the gate valve 2 through a pipeline; The other end of the first release valve 8 is connected in parallel with the connection pipeline at one end of the second release valve 9 and the stop valve 12 through a tee; the other end of the stop valve 12 is connected with the pressure transmitter 14; the pressure transmitter 14 is connected to the alarm The signal transmission unit 6 is connected.

Specifically, as shown in FIG. 2 , there is a manual relief valve at the front and rear ends of the gate valve 2 , the first relief valve 8 is in a normally open state, and a reducing tee is connected from the rear end of the first relief valve 8 . It is connected to the special globe valve 12 for the DN15 pressure gauge, and a pressure transmitter 14 is connected behind the DN15 valve to monitor the upstream and downstream pipe network pressure of the gate valve 2. When it is necessary to discharge, close the special shut-off valve 12. The three-way valve is connected to the second relief valve 9 with the same diameter as the original relief valve. It is in a normally closed state, and the end is plugged. The function is to release the front and rear pipe sections of the gate valve. The alarm signal transmission unit 6 transmits the real-time monitored pressure value in the pipe. Through this structural arrangement, pipeline pressure monitoring and gas release can be performed more safely and effectively.

In this embodiment, as shown in FIG. 1 , the first wire 41 , the second wire 42 , and the gas pipeline protection plate 5 are arranged in parallel with the gas pipeline 1 ; The vertical distance is 0.3-0.5m; the vertical distance between the first wire 41, the second wire 42 and the ground plane is 0.3-0.5m. The distance between the wire and the ground plane is not easy to be too large, and the distance between the wire and the ground plane will increase a lot of construction; if the distance between the wire and the ground plane is too small, it will often happen that when the external force does not pose a threat to the gas pipeline, the wire has been damaged, resulting in an increase in the false alarm rate. . If the distance between the wire and the gas pipeline protection plate 5 is too small, the warning space will be reduced, and the wire and the gas pipeline will be easily damaged at the same time.

In this embodiment, the first wire 41 and the second wire 42 are sheathed with a wire protection tube 16 ; the wire protection tube 16 is made of polyethylene.

Specifically, as shown in Figure 1, the underground wires are protected by small-diameter ordinary PE pipes (De32) to prevent the wires from being damaged during backfilling. They are laid 0.3-0.5m directly above the gas pipeline protection board, and the buried depth is 0.3- 0.5m, the wire is threaded at the same time as the PE pipe connection, and the PE pipe connection is connected by an electrofusion sleeve. According to the length of the pipeline, if the wire is too long when laying the wire, it will be laborious, and it can be laid in sections. , at the connection point as a new starting point, reserve the joint to continue threading, and after all the PE pipes of the wires are laid, perform wiring at each connection point, and conduct a conductivity test after each section of wire is connected. and backfill. The PE pipe at the segment connection is connected by electrofusion pipe fittings, and the elbows, tees, crosses, etc. are connected by electrofusion pipe fittings. At the valve well, use the 90-degree elbow of the PE pipe fitting to lead out the wire in the PE pipe, and connect the wire to the alarm signal transmission unit 6 through the ground threading pipe. Lead the wire collection out of the ground to the alarm signal transmission unit 6 . If there is man-made mechanical damage above the gas pipeline, the first damage is the PE pipe and wire, which sends an alarm signal to the gas company and also serves as a warning to the on-site personnel.

In this embodiment, as shown in FIG. 5 , it further includes: a solar power supply unit 19 ; the solar power supply unit 19 includes: a solar panel 191 , a solar panel support rod 192 , and a battery distribution box 193 ; the solar panel support rod 192 is vertically fixed On the ground plane where the gate valve 2 is buried; the solar panel 191 is fixed on the top of the solar panel support rod 192; the battery distribution box 193 is fixed on one side of the solar panel support rod 192; the alarm signal transmission unit 6 is arranged on the other side of the solar panel support rod 192. One side; the battery distribution box 193 is electrically connected to the alarm signal transmission unit 6 . Since the alarm system is set up in sections, the use of solar power for power supply can reduce the amount of construction. The solar power supply equipment is equipped with batteries. The top of the power supply system is a solar panel, the height of the pole is 2.5m, and the lower edge of the battery distribution box is supported by the solar panel. The pole is fixed at a height of 1.3-1.5m from the ground. The solar panel power line is introduced from the pole to the power control box. The overall solar power supply equipment adopts lightning protection grounding. The grounding lead is threaded under the distribution box, and the threading place is sealed to prevent moisture from entering. The base of the struts is built with a concrete foundation and fastened with four bolts. The power supply system is set near the valve well, and care should be taken to avoid setting it under the tree and on the north side of the building, which will affect the power supply of the receiving sunlight system.

In this embodiment, it also includes: a control box bracket 17 and a control box 18; the alarm signal transmission unit 6 is arranged in the control box 18; the control box bracket 17 is sleeved on the solar panel support rod 192; the control box 18 and the control box bracket 17 is fixedly connected; the sound and light alarm 7 is fixedly connected with the control box 18.

Specifically, as shown in FIG. 1 , FIG. 3 and FIG. 4 , the alarm signal transmission unit 6 is connected to the underground lead wire, the wire is fixed along the solar panel support rod 192 , and penetrated from the lower part of the control box 18 through the wire sleeve, and is sealed with sealant Sealed to prevent moisture gas from entering. The control box 18 is fixed at a height of 1.3-1.5m above the ground from the solar panel pole 192 , which is the same height as the battery distribution box 193 but has obvious appearance differences. Since the battery distribution box 193 and the control box 18 are placed outdoors for a long time, the protection level must reach the standard of IP66 or above. The poles and the box are fixed with two upper and lower double U-shaped movable pipe clamps, which is convenient to adjust the height of the box and the ground. The back of the pipe clamp is connected to the fixed bracket point of the box body, and a protective pad is added between the pipe clamp and the support rod to prevent corrosion of the pipe clamp and the support rod. The upper and lower U-shaped pipe clamps are secured with bolts to fix the battery distribution box 193 and the control box 18 . There are two rows of LED lights on the 18 panel of the control box. Green indicates that the pipe network is running normally, and red indicates that the pipe network has been damaged. There are at most four green LED lights and four red LED lights (four alarm zones), and the corresponding protection zones are marked on the corresponding LED lights.

In this embodiment, the alarm signal transmission unit 6 is provided with two wireless transmission modules, and the two wireless transmission modules respectively transmit the alarm signal and the pipeline pressure signal to the central control room of the gas company. A wireless transmission module can connect up to eight wires and four protection areas. In the straight section, the upstream and downstream two valve sections can share a system, and a wireless alarm system can be shared at the tee or cross to save equipment and expenses. The digital wireless transmission module adopts DC9-24V power supply, can connect four sets of signals, has a 4G/5G mobile phone card slot, and transmits the on-site digital signal to the central control room of the gas company through the 4G/5G signal, and the signal refresh rate is 1-8 seconds. tune.

In this embodiment, as shown in Figures 2 and 5, the two pressure transmitters 14 of the buried gate valve 2 are wired to the pressure control transmission module in the control box 18. The pressure transmission module also adopts the form of wireless signal transmission and is equipped with 4G/ The 5G mobile phone card wirelessly transmits the pressure signal to the wireless signal receiving module of the PLC control cabinet in the central control room through the 4G/5G signal, and the PLC control cabinet uploads the pressure signal to the computer display interface. Each pressure transmission module can be expanded according to the number of on-site valves and pressure sampling points. The pressure signal wireless receiving module of the PLC control cabinet in the central control room can also be installed in a control box separately according to the number of signal acquisitions.

In this embodiment, as shown in FIG. 5 , a wireless video monitoring device is installed under the solar panel 191 at a height of 2.2 meters from the ground according to the number of alarm areas, which can be rotated 360 degrees for remote control, and can have two-way voice intercom. The power supply is taken from the battery distribution box 193, and the video signal is transmitted to the central control room in real time through the built-in mobile phone traffic card. The storage capacity of the receiving end of the central control room is not less than 30 days, and the video cloud storage capacity is not less than 30 days, which can be played back and viewed at any time. . This wireless video device mainly plays a role of close-range monitoring, which can patrol and monitor the nearby pipeline network. If you find that there are people, machinery and equipment construction activities nearby, you can go to the site to check and inquire as soon as possible.

In this embodiment, the central control room receives live video signals through the signal base station, the storage capacity of the receiving end of the central control room is not less than 30 days, and the video cloud storage capacity is not less than 30 days, which can be played back and viewed at any time. And mark each video surveillance area in the central control room, and the personnel in the central control room can view the scene situation of each alarm area in real time.

The computer display interface of the central control room records the downstream user information and valve specifications and models of each alarm terminal into the central control system. When an alarm signal occurs on site in an alarm area, the computer terminal displays the alarm area according to the location, and at the same time, the alarm signal is automatically stored. At the same time, the valve specifications and models, downstream customer information, pipe network pressure, pipe diameter, length and other information in the alarm area will be automatically popped up (you can also manually click to query), and the central control duty personnel will notify the emergency team and on-site line inspection of the alarm information. personnel, and print out the information of the alarmed area to the rescue team and customer service personnel. Customer service and maintenance and rescue personnel promptly notify downstream gas customers and arrive at the scene with corresponding rescue equipment to reduce the time for response and disposal.

In this embodiment, in order to prevent the on-site personnel from being unable to see the alarm information in time, the computer terminal sends the alarm information to the mobile phone terminal of the pipeline patrol personnel in the form of text messages, and the on-duty personnel in the central control room notify the on-site patrol personnel by telephone, and the pipeline patrol personnel Arrive at the scene as soon as possible for coordination.

Overall beneficial effects:

The invention enables the gas company to give an early warning of the destruction of the gas pipeline network, and to act in time to stop and rescue the gas, so as to avoid the occurrence of more serious accidents. At the same time, this system also takes into account the occurrence of extremely special events such as directional drilling construction and well drilling. The sabotage avoids the warning wire above the gas pipeline and causes substantial damage to the gas pipeline. The pressure drop can be used to judge the destructive behavior of the gas pipeline. Make an early warning. Moreover, this system can also monitor nearby areas in real time through wireless video surveillance equipment within a short range. If the pipeline network is damaged, it can also use this video surveillance equipment to find and lock the person or mechanical equipment for the destructive behavior, which is helpful for later accident handling. and forensics.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The technical solutions described in the foregoing embodiments can still be modified, or some or all of the technical features thereof can be equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present invention. scope.

Claims (9)

1. The utility model provides a wireless alarm system of gas pipe network breakage prevention which characterized in that includes:

the device comprises a gas pipeline (1), a gate valve (2), a pressure monitoring and diffusing unit (31), a first lead (41), a second lead (42), a gas pipeline protection plate (5), an alarm signal transmission unit (6) and an audible and visual alarm (7);

the gas pipeline (1), the gate valve (2), the pressure monitoring and diffusing unit (31), the first lead (41), the second lead (42) and the gas pipeline protection plate (5) are all buried below the ground level; the alarm signal transmission unit (6) and the audible and visual alarm (7) are positioned above the ground plane;

the gas pipeline (1) is provided with a plurality of gate valves (2) at intervals in sections; the left end and the right end of the gate valve (2) are respectively provided with the pressure monitoring diffusing unit (31); the gas pipeline protection plate (5) is arranged above the gas pipeline (1); the first lead (41) and the second lead (42) are both arranged above the gas pipeline protection plate (5); the first conducting wire (41) and the second conducting wire (42) are respectively positioned on the left side and the right side of the vertical central line of the gate valve (2);

the first lead (41) and the second lead (42) are respectively connected with the alarm signal transmission unit (6); the audible and visual alarm (7) is connected with the alarm signal transmission unit (6); when the first lead (41) or the second lead (42) is disconnected, the audible and visual alarm (7) sends out an alarm signal.

2. The wireless alarm system for preventing the destruction of a gas pipe network according to claim 1, wherein the pressure monitoring and diffusing unit (31) comprises:

the device comprises a first relief valve (8), a second relief valve (9), a stop valve (12) and a pressure transmitter (14);

one end of the first relief valve (8) is connected with one end of the gate valve (2) through a pipeline; the other end connecting pipeline of the first bleeding valve (8) is connected in parallel with the connecting pipelines at one ends of the second bleeding valve (9) and the stop valve (12) through a tee; the other end of the stop valve (12) is connected with the pressure transmitter (14); the pressure transmitter (14) is connected with the alarm signal transmission unit (6).

3. The wireless alarm system for preventing the damage of the gas pipe network as claimed in claim 2, wherein the first lead (41), the second lead (42) and the gas pipeline protection plate (5) are arranged in parallel with the gas pipeline (1);

the vertical distance between the first lead (41) and the second lead (42) and the gas pipeline protection plate (5) is 0.3-0.5 m;

the vertical distance between the first conducting wire (41) and the second conducting wire (42) and the ground plane is 0.3-0.5 m.

4. The wireless alarm system for preventing the gas pipe network from being damaged according to claim 3, wherein a wire protection tube (16) is sleeved outside the first wire (41) and the second wire (42); the lead protection tube (16) is made of polyethylene.

5. The wireless alarm system of claim 1, further comprising: a solar power supply unit (19);

the solar power supply unit (19) comprising: a solar panel (191), a solar panel strut (192), a battery distribution box (193);

the solar panel supporting rod (192) is vertically fixed on a ground plane in which the gate valve (2) is buried; the solar panel (191) is fixed at the top end of the solar panel support rod (192); the battery distribution box (193) is fixed on one side of the solar panel support rod (192); the alarm signal transmission unit (6) is arranged on the other side of the solar panel supporting rod (192); the battery distribution box (193) is electrically connected with the alarm signal transmission unit (6).

6. The wireless alarm system of claim 5, further comprising: a control box bracket (17) and a control box (18);

the alarm signal transmission unit (6) is arranged in the control box (18); the control box bracket (17) is sleeved on the solar panel supporting rod (192); the control box (18) is fixedly connected with the control box bracket (17); the audible and visual alarm (7) is fixedly connected with the control box (18).

7. The wireless alarm system of claim 6, wherein the solar panel support rods (192) are 2.5m high; the battery distribution box (193) is fixed on one side of the solar panel support rod (192) which is 1.3-1.5m away from the ground level.

8. The wireless alarm system of claim 5, wherein at least one video monitoring device (20) is further fixedly connected to the solar panel support rod (192).

9. The wireless alarm system for preventing the gas pipe network from being damaged according to any one of claims 1 to 8, wherein the alarm signal transmission unit (6) is provided with two wireless transmission modules, and the two wireless transmission modules respectively transmit the alarm signal and the pipeline pressure signal to a central control room of a gas company.

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