CN111968347A

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

Info

Publication number: CN111968347A
Application number: CN202010879324.2A
Authority: CN
Inventors: 闫洪飞; 孙守相; 潘政华
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-08-27
Filing date: 2020-08-27
Publication date: 2020-11-20

Abstract

The invention discloses a gas pipe network damage-proof wireless alarm system, which comprises: the device comprises a gas pipeline, a gate valve, a pressure monitoring and diffusing unit, a first lead, a second lead, a gas pipeline protection plate, an alarm signal transmission unit and an audible and visual alarm; a plurality of gate valves are arranged on the fuel gas pipeline at intervals; the left end and the right end of the gate valve are respectively provided with a pressure monitoring diffusing unit; the gas pipeline protection plate is arranged above the gas pipeline; the first conducting wire and the second conducting wire are both arranged above the gas pipeline protection plate; the first conducting wire and the second conducting wire are respectively positioned on the left side and the right side of the vertical central line of the gate valve; the first lead and the second lead are respectively connected with the alarm signal transmission unit; the audible and visual alarm is connected with the alarm signal transmission unit; when the first lead or the second lead is disconnected, the audible and visual alarm sends out an alarm signal. The invention ensures that the alarm signal is sent out at the first time when the gas pipeline is damaged, and the emergency repair is carried out in time.

Description

Anti-damage wireless alarm system for gas pipe network

Technical Field

The invention relates to the technical field of gas pipeline protection, in particular to a wireless alarm system for preventing a gas pipeline network from being damaged.

Background

The underground gas pipeline is worried about the occurrence of third-party construction damage after being laid, although a protective cover plate is laid above the pipeline to serve as warning and defense functions for preventing the third-party damage during the laying of the gas pipeline, warning identification piles are arranged above the pipeline at intervals, the gas pipeline still can be damaged, the existing distributed optical fiber vibration sensing system in the prior art can give an early warning, the finished gas pipeline is not suitable for being excavated and added with an optical cable, the optical cable is laid close to the pipeline, the excavation and the laying can be troublesome and increase a lot of engineering quantity and construction cost, the directional drilling non-excavation pipeline cannot be repeatedly conducted to conduct directional drilling construction and laying of the optical cable, and the method is only suitable for laying a newly-constructed pipeline lower pipe. However, by using the method, the optical cable needs to be laid from the starting end of the gas pipeline to the tail end, and the gas pipeline of part of the road section adopts a directional drilling non-excavation mode, so that the construction of the optical cable cannot be increased.

Disclosure of Invention

The invention provides a wireless alarm system for preventing a gas pipe network from being damaged, which aims to overcome the technical problem.

The invention relates to a gas pipe network damage-proof wireless alarm system, which comprises: the device comprises a gas pipeline, a gate valve, a pressure monitoring and diffusing unit, a first lead, a second lead, a gas pipeline protection plate, an alarm signal transmission unit and an audible and visual alarm; the gas pipeline, the gate valve, the pressure monitoring and diffusing unit, the first lead, the second lead and the gas pipeline protection plate are all buried below the ground level; the alarm signal transmission unit and the audible and visual alarm are positioned above the ground plane; the fuel gas pipeline is provided with a plurality of gate valves at intervals; the left end and the right end of the gate valve are respectively provided with the pressure monitoring diffusing unit; the gas pipeline protection plate is arranged above the gas pipeline; the first conducting wire and the second conducting wire are both arranged above the gas pipeline protection plate; the first conducting wire and the second conducting wire are respectively positioned on the left side and the right side of the vertical central line of the gate valve; the first lead and the second lead are respectively connected with the alarm signal transmission unit; the audible and visual alarm is connected with the alarm signal transmission unit; and when the first lead or the second lead is disconnected, the audible and visual alarm sends out an alarm signal.

Further, the pressure monitoring diffusing unit includes: the device comprises a first bleeding valve, a second bleeding valve, a stop valve and a pressure transmitter; one end of the first bleeding valve is connected with one end of the gate valve through a pipeline; the other end connecting pipeline of the first bleeding valve is connected in parallel with the connecting pipelines at one ends of the second bleeding valve and the stop valve through a tee; the other end of the stop valve is connected with the pressure transmitter; and the pressure transmitter is connected with the alarm signal transmission unit.

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

Furthermore, the outer parts of the first lead and the second lead are sleeved with lead protection tubes; the wire protection tube is made of polyethylene.

Further, still include: a solar power supply unit; the solar power supply unit includes: the solar panel, the solar panel supporting rod and the battery distribution box; the solar panel supporting rod is vertically fixed on a ground plane embedded with the gate valve; the solar panel is fixed at the top end of the solar panel supporting 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 supporting rod; and the battery distribution box is electrically connected with the alarm signal transmission unit.

Further, still include: a control box bracket and a control box; the alarm signal transmission unit is arranged in the control box; the control box support is sleeved on the solar panel support rod; the control box is fixedly connected with the control box bracket; and the audible and visual alarm is fixedly connected with the control box.

Furthermore, the height of the solar panel supporting rod is 2.5 m; the battery distribution box is fixed on one side of the solar panel supporting rod, which is 1.3-1.5m away from the ground level.

Furthermore, still fixedly connected with at least one video monitoring equipment on the solar panel branch.

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 a central control room of a gas company.

The invention adopts two wires distributed above the gas pipeline, an interval is formed between each section of valve well, every two wires and the alarm system form an alarm loop, if the wires in the interval are broken, the alarm system at the valve well can immediately perform acousto-optic alarm on site. For whether more accurate control gas pipeline is impaired, the gate valve both ends are equipped with pressure sensing unit in the valve well respectively, judge whether gas pipeline is impaired through the pressure variation in the monitoring gas pipeline to guarantee that the impaired very first time of gas pipeline sends alarm signal, salvage in time.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a gas pipeline network damage prevention wireless alarm system;

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

FIG. 3 is a schematic view of the structure of the control box bracket and the control box according to the present invention;

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

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

The reference numbers illustrate:

1. a gas pipeline; 2. a gate valve; 31. a pressure monitoring and diffusing unit; 41. a first conductive line; 42. a second conductive line; 5. a gas pipeline protection plate; 6. an alarm signal transmission unit; 7. an audible and visual alarm; 8. a first bleed valve; 9. a second bleed valve; 12. a stop valve; 14. a pressure transmitter; 16. a lead protection tube; 17. a control box bracket; 18. a control box; 19. a solar power supply unit; 191. a solar panel; 192. a solar panel support rod; 193. a battery distribution box; 20. video monitoring equipment.

Detailed Description

In order to make the objects, 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 drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

This embodiment provides a wireless alarm system of gas pipe network anti-destruction, as shown in fig. 1, the system divide into underground part and aboveground part, wherein: a subterranean portion comprising: the device comprises a gas pipeline 1, a gate valve 2, a pressure monitoring and diffusing unit 31, a second pressure monitoring and diffusing unit 32, a first lead 41, a second lead 42 and a gas pipeline protection plate 5; an above-ground portion comprising: an alarm signal transmission unit 6 and an audible and visual alarm 7.

The gas pipeline 1 is laid in sections, a gate valve 2 for controlling the opening and closing of the gas pipeline 1 is arranged between every two sections of pipelines, pressure monitoring and releasing units are arranged at two ends of each gate valve 2 respectively, the pressure monitoring and releasing units are used for monitoring the pressure value in the pipelines, when the pressure of a control point in the pipelines exceeds a set value (bubble burst pressure), a releasing valve can be opened to discharge a certain amount of gas, and the pipelines are prevented from being damaged due to overlarge pressure. One deck gas pipeline protection shield 5 has been laid to the top of gas pipeline 1, prevents that heavy objects such as stone from causing destruction to gas pipeline 1. And conducting wires are respectively arranged on two sides of the upper part of the gas pipeline protection plate 5 by taking each gate valve 2 as a central axis, the two conducting wires are respectively connected with the alarm signal transmission unit 6 of the overground part, every two conducting wires and the alarm signal transmission unit 6 form an alarm loop, and when any one conducting wire is broken, the alarm signal transmission unit 6 transmits a signal to the audible and visual alarm 7 for alarming.

Each section of valve well is a protection area, an alarm signal transmission unit 6 and an audible and visual alarm 7 can be shared between two upstream and downstream valve well sections, and one alarm signal transmission unit 6 can be simultaneously connected with 1-4 protection area signal lines, namely 2-8 wires. Be equipped with the LED lamp on alarm signal transmission unit 6, when the underground wire is destroyed the warning, the LED lamp is turned into red flashing by green often bright, controls 7 circulation voice broadcast of audible-visual annunciator simultaneously, for example: "suspected gas pipeline is destroyed on site, please inform gas company, telephone XXXXXXX immediately, if gas leaks, please alarm immediately, forbid the fire source near the destruction point".

The method for comprehensively matching the pressure signal with the underground lead alarm signal comprises the following steps:

the first protection area pressure transmitter and the second protection area pressure transmitter belong to a valve, are spaced by about one meter before and after, have basically the same pressure, but can comprehensively judge whether the gas pipe network is damaged and leaked with the alarm signal of the alarm wire above the gas pipeline.

1. When the underground wire alarm signal of the first protection area alarms, the pressure of the first protection area does not change, and the first protection area indicates that only a destructive behavior occurs above the pipeline, and the gas pipeline is not damaged;

2. when the underground lead alarm signal of the first protection area alarms and the pressure of the first protection area and the second protection area is reduced, the fact that the gas pipeline of the first protection area is substantially damaged is indicated;

3. if the ground artificial damage is not mechanical or artificial damage directly from the upper part of the gas pipeline, but is a small concept event of directional drilling construction or ground well drilling, the alarm wire above the gas pipeline can be bypassed, and threat damage is generated to the underground pipeline. Under the condition, the sudden pressure drop can be used as a judgment basis for the damage of the gas pipeline.

When the underground signal lead of the first protection area has no alarm signal, the pressure of the first protection area and the pressure of the second protection area are reduced, which indicates that the gas pipeline is possibly damaged, the pressure drop reason and the leakage point are checked by actually checking and detecting the leakage on the site of the first protection area and the second protection area. The descending range is compared with the pressure of the outlet end of a gas company, and the pressure of the first protection area and the pressure of the second protection area belong to a valve according to the actual outlet pressure grade and the actual outlet flow, the displayed pressure is basically the same as the displayed pressure of the first protection area and the displayed pressure of the second protection area which are separated by about one meter, but the pressure of the first protection area and the displayed pressure of the second protection area can be comprehensively judged whether the gas pipe network is damaged or not and leaks with the alarm signal of the alarm wire above the gas pipe.

1. When the underground wire alarm signal of the second protection area alarms, the pressure of the first protection area and the pressure of the second protection area do not change, and the situation that the damage action is only generated above the pipeline of the second protection area and the gas pipeline is not damaged is shown;

2. when the underground wire alarm signal of the second protection area alarms, and the pressure of the first protection area and the second protection area is reduced, the fact that the gas pipeline of the second protection area is substantially damaged is indicated;

When the underground signal lead of the second protection area has no alarm signal, the pressure of the first protection area and the pressure of the second protection area are reduced, which indicates that the gas pipeline is possibly damaged, and the pressure drop reason and the leakage point are checked by actually checking and detecting the leakage on the site of the first protection area and the second protection area.

In this embodiment, the pressure monitoring diffusing unit 31 includes: 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 diffusion valve 8 is connected in parallel with the connecting pipelines at one ends of the second diffusion valve 9 and the stop valve 12 through a tee; the other end of the stop valve 12 is connected with a pressure transmitter 14; the pressure transmitter 14 is connected to the alarm signal transmission unit 6.

Specifically, as shown in fig. 2, the front end and the rear end of the gate valve 2 are both provided with a manual bleeding valve, the first bleeding valve 8 is in a normally open state, the rear end of the first bleeding valve 8 is respectively connected with a reducing tee, the reducing tee is connected with a special stop valve 12 for a DN15 pressure gauge, the rear end of the DN15 valve is connected with a pressure transmitter 14, and the upstream pipeline network pressure and the downstream pipeline network pressure of the gate valve 2 are monitored. When bleeding is required, the dedicated shut-off valve 12 is closed. The back of the three-way valve is connected with a second bleeding valve 9 with the same caliber as the original bleeding valve, the valve is in a normally closed state, the tail end of the valve is provided with a plug, the valve is used for bleeding the front pipe section and the rear pipe section of the gate valve, and the pressure transmitter 14 is connected with the alarm signal transmission unit 6 and transmits the real-time monitored pressure value in the pipe to the alarm signal transmission unit 6. Through this structure setting, can more safe effectual pipeline pressure monitoring and gas diffuse.

In this embodiment, as shown in fig. 1, the first lead 41, the second lead 42, the gas pipeline protection plate 5 and the gas pipeline 1 are arranged in parallel; 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 and

second conductors

41, 42 and the ground plane is 0.3-0.5 m. The distance between the conducting wire and the ground plane is not easy to be overlarge, and the overlarge distance can increase a lot of construction amount; when the distance between the wire and the ground plane is too small, the wire is damaged when external force does not threaten the gas pipeline, so that the false alarm rate is increased. The wire can reduce the early warning space with 5 undersize of gas pipeline protection shields, makes wire and gas pipeline destroyed simultaneously easily.

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

Specifically, as shown in fig. 1, the underground conductor is protected by a small-caliber common PE pipe (De32), the conductor is prevented from being damaged during backfilling, the conductor is laid over a gas pipeline protection plate by 0.3-0.5m, the buried depth is 0.3-0.5m from the ground, the conductor is threaded while being connected with the PE pipe, the PE pipe is connected by an electric melting sleeve, the threading is too long and is laborious according to the length of the pipeline, the conductor can be laid in sections, the connection positions are laid in sections to avoid threading stress, the connection positions are new starting points, connectors are reserved for continuous threading, after all the conductor PE pipes are completely laid, the connection is performed at each connection point, a conduction test is performed after each section of the conductor is connected, and the PE pipe connection and backfilling are performed after the conduction test is qualified. The PE pipes at the segmented joints are connected by electric melting pipe fittings, and the positions of elbows, tee joints, four-way joints and the like are connected by electric melting pipe fittings. The PE pipe 90-degree elbow is adopted at the valve well to lead out the lead in the PE pipe, the lead is connected to the alarm signal transmission unit 6 through the overground threading pipe, and the tee joint or the four-way PE pipe is adopted at the valve well or the tee joint or the four-way to collect the lead and lead out of the ground to the alarm signal transmission unit 6. If there is man-made mechanical damage above the gas pipeline, the first damaged PE pipe and wire will give warning signal to the gas company and also play the role of warning for the field personnel.

In this embodiment, as shown in fig. 5, the method further includes: a solar power supply unit 19; solar power supply unit 19, comprising: solar panel 191, solar panel strut 192, battery distribution box 193; the solar panel supporting rod 192 is vertically fixed on a ground plane embedded with the gate valve 2; 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 192; the alarm signal transmission unit 6 is arranged on the other side of the solar panel support rod 192; the battery distribution box 193 is electrically connected to the alarm signal transmission unit 6. Because alarm system sets up by stage, the construction volume can be reduced to the power supply adopts solar energy power supply, solar energy power supply equipment has the battery, this power supply system top is solar panel, the branch height is 2.5m, battery block terminal is fixed along the eminence that is 1.3-1.5m apart from ground at solar panel branch down, the solar panel power cord is introduced the power control box from the branch in, whole solar energy power supply equipment adopts lightning grounding, the ground lead wire is the threading in the block terminal below, the sealed moisture that prevents of threading department gets into. The support rod base is used for building a concrete foundation and is fixed by four bolts. The power supply system is arranged near the valve well, and meanwhile, attention is paid to avoid influence on power supply of the sunlight receiving system under trees and on the north side of a building.

In this embodiment, the method further 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 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.

Specifically, as shown in fig. 1, 3 and 4, the alarm signal transmission unit 6 is connected to underground lead wires, the lead wires are fixed along the solar panel support rods 192, penetrate from the lower part of the control box 18 through wire sleeves, and are sealed by sealant to prevent the entry of humid gas. The control box 18 is fixed at a height of 1.3-1.5m from the ground on the solar panel support 192, is the same as the height of the battery distribution box 193, and has obvious appearance difference. Because battery block terminal 193 and control box 18 are placed in the open air for a long time, the protection level needs to reach the standard above IP66, two upper and lower double-U-shaped movable pipe clamps are adopted for the branch and the box body are fixed, the height of the box body and the ground is convenient to adjust, the back of each pipe clamp is in point connection with the box body fixing support, a protection pad is added between each pipe clamp and the branch, and the pipe clamps and the branch are prevented from being corroded. The upper and lower U-clamps are bolted together to secure the battery box 193 to the control box 18. The control box 18 panel has two rows of LED lamps, and green is that the pipe network operation is normal, and red takes place to destroy for the pipe network and instructs the warning, and the quantity is according to warning area quantity and decides, and at least one green LED lamp and one red LED lamp (warning area) are four green LED lamps and four red LED lamps (four warning areas) at most to mark corresponding protection area on corresponding LED lamp.

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 be connected with eight wires and four protection areas at most, two upstream and downstream valve areas can share one system in a straight-through section, and a wireless alarm system is shared in a tee joint or a four-way joint, so that equipment and cost are saved. The switching value wireless transmission module is powered by DC9-24V, can be connected with four groups of signals, is provided with a 4G/5G mobile phone card slot, transmits the field switching value signal to a central control room of a gas company through the 4G/5G signal, and has adjustable signal refreshing rate of 1-8 seconds.

In this embodiment, as shown in fig. 2 and 5, two pressure transmitters 14 of the buried gate valve 2 are wired to a pressure control transmission module in a control box 18, the pressure transmission module also adopts a wireless signal transmission form and is provided with a 4G/5G mobile phone card, the pressure signal is wirelessly transmitted to a special wireless signal receiving module of a PLC control cabinet in a central control room through the 4G/5G signal, and the PLC control cabinet uploads the pressure signal to a computer end display interface. Each pressure transmission module can be expanded according to the number of field valves and the number of pressure sampling points, and the pressure signal wireless receiving module of the PLC control cabinet of the central control room can also be independently installed in one control box according to the number of signal acquisition.

In this embodiment, as shown in fig. 5, wireless video monitoring devices are installed below the solar panel 191 at a height of 2.2 m from the ground according to the number of alarm areas, and can rotate 360 degrees at will for remote control and two-way voice talkback. The power supply is taken from a battery distribution box 193, video signals are transmitted to a central control room in real time through a mobile phone flow card, the storage capacity of a receiving end of the central control room is not less than 30 days, the storage capacity of a video cloud is not less than 30 days, and the video cloud can be played back and viewed at any time. The wireless video equipment mainly plays a role in close-range monitoring, can be used for patrolling and monitoring nearby pipe networks, and can check inquiry and stop at the site at the first time if people and mechanical equipment construction activities nearby are found.

In this embodiment, the central control room receives the on-site video signal through the signal base station, and central control room receiving end storage capacity is no less than 30 days, and video high in the clouds storage capacity is no less than 30 days, can replay at any time and look over. And each video monitoring area is marked in the central control room, and personnel in the central control room can check the field condition of each alarm area in real time.

A computer display interface of the central control room inputs the downstream user condition and the specification model of the valve of each alarm end into the central control system, when an alarm signal appears in a certain alarm area, the computer end displays the alarm area according to the position, and simultaneously, the alarm signal is automatically stored for later checking; meanwhile, the information of the specification and the model of the valve, the downstream customer information, the pipe network pressure, the pipeline caliber, the length and the like in the alarm area is automatically popped up (or manually clicked for query), the central control attendant informs the alarm information to the emergency team and the on-site line patrol personnel, and the information of the alarm area is printed and handed to the emergency team and the customer service personnel. The customer service and maintenance emergency personnel inform downstream gas customers and carry corresponding emergency equipment to arrive at the site in time, and the reaction and disposal time is reduced.

In this embodiment, in order to prevent that field personnel can not see alarm information in time, the computer end sends alarm information to pipe network patrolling personnel cell-phone end in the form of short message, and well control room attendant phone announcement field patrolling personnel, and pipe network patrolling personnel arrive the scene very first time and coordinate the processing.

The whole beneficial effects are as follows:

the invention can lead a gas company to early warn that the gas pipe network is damaged in the first time, and act in time to stop and rescue, thereby avoiding more serious accidents. Meanwhile, the system also considers that extremely special events such as directional drilling construction, well drilling and the like occur, the damage behavior avoids the early warning lead above the gas pipeline, the gas pipeline is substantially damaged, and the damage behavior of the gas pipeline can be judged through pressure drop to carry out early warning. In addition, the system can also monitor nearby areas in real time through the wireless video monitoring equipment in a close range, for example, a pipe network is damaged, people or mechanical equipment locking the damage can be searched through the video monitoring equipment, and later-period accident processing and evidence obtaining are facilitated.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

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.