An environmental gas detection method for tunnels around a gas storage reservoir

Abstract

The present invention discloses a method for detecting ambient gas in a tunnel around a gas storage reservoir, which comprises the following steps: 1) laying a slide rail, 2) installing a support seat, 3) installing a ground gas detection mechanism, 4) installing a tunnel inner wall gas detection mechanism, and 5) detecting tunnel gas. The method for detecting ambient gas of the present invention has simple steps, not only improves the detection efficiency of the ambient gas in the tunnel around the gas storage reservoir, but also can quickly determine the leakage points on the tunnel inner wall and the ground, facilitating timely repair of the tunnel inner wall and the ground. At the same time, the labor intensity of manual operation is greatly reduced and the positioning is accurate.

Description

Technical Field

[0001] The present invention relates to a method for detecting ambient gas in a tunnel around a gas storage reservoir. Background Art

[0002] With the continuous development of the social economy and the increasing demand for natural gas, in order to meet the demand for natural gas, increase the storage volume of natural gas, underground gas storage reservoirs have been built throughout China.

[0003] A gas storage reservoir, that is, a container for storing natural gas, refers to an artificial gas field or gas reservoir formed by injecting the natural gas produced from a natural gas field into a space underground where the gas can be stored again at a different location. Generally, it is an underground gas storage reservoir. It is usually built near the downstream area where natural gas is used in cities. The operation of the gas storage reservoir is carried out on an annual basis, and the operation process is "producing gas in winter and spring, and injecting gas in summer and autumn".

[0004] In the prior art, when detecting the ambient gas in a tunnel around a gas storage reservoir, generally, an operator holds a detection instrument by hand and performs gas detection along the inner wall of the tunnel. This not only has low detection efficiency, but also increases the labor intensity of manual operation. At the same time, it is easy to cause missed detection and cannot achieve rapid and accurate positioning. Summary of the Invention

[0005] The purpose of the present invention is to provide a technical solution for a method for detecting ambient gas in a tunnel around a gas storage reservoir in view of the deficiencies of the prior art. The steps of this ambient gas detection method are simple. It not only improves the detection efficiency of the ambient gas in the tunnel around the gas storage reservoir, but also can quickly determine the leakage points on the inner wall and the ground of the tunnel, facilitating timely repair of the inner wall and the ground of the tunnel. At the same time, it greatly reduces the labor intensity of manual operation and has accurate positioning.

[0006] To solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A method for detecting ambient gas in a tunnel around a gas storage reservoir, characterized by comprising the following steps:

[0008] 1) Rail laying

[0009] a. First, clean both sides of the ground of the tunnel to ensure that the rails are laid horizontally;

[0010] b. Then, determine the laying length of the rails according to the length and width of the tunnel, and install the rails in parallel along both sides of the ground of the tunnel, and two rails are installed on each side;

[0011] 2) Support seat installation

[0012] a. First, determine the size of the support base according to the distance between two slide rails on the same side, select a plate body with a suitable size, symmetrically open guide grooves along one side of the plate body, and then symmetrically open chutes at the bottom of the plate body that match the size of the slide rails. The distance between the two chutes matches the distance between the two slide rails.

[0013] b. Then, install a driving component on the plate body. The driving component is close to the chute, and a height adjustment component is installed along the side close to the guide groove. At the same time, select a controller and a third battery pack, install the controller and the third battery pack inside the plate body, and connect them through wires.

[0014] c. Next, place the installed support base on the slide rails, with the side with the guide groove facing away from the tunnel inner wall.

[0015] 3) Installation of the ground gas detection mechanism

[0016] a. First, move the two support bases to be in the same vertical plane, measure the horizontal distance between the two support bases, and then determine the size of the cantilever assembly according to the horizontal distance, and fabricate the corresponding cantilever assembly.

[0017] b. Then, install the two ends of the cantilever assembly on the support bases on both sides, connect the cantilever assembly with the height adjustment component, and then cover the top of the plate body with a cover plate, and fix and install the cover plate and the plate body with screws.

[0018] c. Next, determine the size of the ground gas detection component according to the size of the cantilever assembly, process the corresponding ground gas detection component, install the ground gas detection component on the cantilever assembly, and electrically connect both the ground gas detection component and the cantilever assembly to the controller.

[0019] 4) Installation of the tunnel inner wall gas detection mechanism

[0020] a. First, determine the size of the annular guide component according to the inner wall radian of the tunnel, splice the corresponding annular guide component, and install the processed annular guide component between the two support bases.

[0021] b. Then, determine the size of the tunnel inner wall gas detection mechanism according to the distance between the annular guide component and the tunnel inner wall, and install the tunnel inner wall gas detection mechanism on the annular guide component. Both the annular guide component and the tunnel inner wall gas detection mechanism are electrically connected to the controller in the support base.

[0022] 5) Tunnel gas detection

[0023] a. First, the circuits of the support seat, the ground gas detection mechanism, the annular guide assembly and the tunnel inner wall gas detection mechanism are turned on, and the height adjustment assembly is controlled to descend through the control terminal, so that the suspension beam assembly is close to the ground of the tunnel until the ground gas detection assembly is 20 to 30 cm above the ground, and then the ground gas detection assembly is started, so that the ground gas detection assembly moves back and forth on the suspension beam assembly along the width direction of the tunnel at a speed of 1 to 2 m / min;

[0024] b. Then start the annular guide assembly, so that the tunnel inner wall gas detection mechanism moves in an arc along the tunnel inner wall at a speed of 0.5-1m / min under the action of the annular guide assembly;

[0025] c. After the ground gas detection mechanism and the tunnel inner wall gas detection mechanism have completed the detection in the same vertical plane, the driving assembly in the support seat is started to drive the ground gas detection mechanism and the tunnel inner wall gas detection mechanism to move along the slide rail a distance in the length direction of the support seat, and the ground and inner wall of the tunnel are detected simultaneously in the next vertical plane. When the type and concentration of the gas are detected on the ground and / or inner wall of the tunnel, a signal is sent to the control terminal;

[0026] d. After the environmental gas detection of the entire tunnel is completed, remove the support seat and dismantle the slide rail.

[0027] The environmental gas detection method has simple steps, which not only improves the efficiency of environmental gas detection in tunnels around the gas storage reservoir, but also can quickly determine the leakage points on the inner wall and the ground of the tunnel, making it convenient to repair the inner wall and the ground of the tunnel in time. At the same time, it greatly reduces the labor intensity of manual operation and has accurate positioning.

[0028] Furthermore, the driving assembly in step 2) includes a third motor, a third transmission rod and a second roller. The third motor is connected to the third transmission rod through a third bevel gear set. The second roller is arranged on the third transmission rod. The second roller is located in the slide groove. The third transmission rod is driven to rotate by the third motor through the third bevel gear set, and then the second roller can be driven to rotate, so that the support seat moves along the slide rail.

[0029] Furthermore, the height adjustment component in step 2) includes a second motor, a second transmission rod and a first screw rod, the second motor is connected to the second transmission rod through a second bevel gear set, the second transmission rod is connected to the first screw rod through a second bevel gear set, the first screw rod is vertically arranged on the plate body, the suspension beam component is connected to the first screw rod, and the first screw rod is driven to rotate by the second motor through the second transmission rod, thereby driving the suspension beam component to move up and down to adjust the height position.

[0030] Furthermore, the cantilever assembly in step 3) includes a guide rail, a suspension plate, cantilevers, a fourth motor, and a second screw rod. A second reinforcing rod is provided between two cantilevers on the same side. Fixed rods are connected to both of the two cantilevers on the same side. A guide rail is provided between the two opposite fixed rods. A guide groove is provided on the guide rail. A suspension plate is provided between the two fixed rods on the same side. The fourth motor is arranged on the suspension plate. The second screw rod connects the fourth motor and the ground gas detection assembly. The second screw rod is connected to the two suspension plates. The cantilevers and the fixed rods can greatly improve the stability and reliability of the installation of the guide rail, and further improve the stability of the operation of the ground gas detection assembly. The suspension plate and the second reinforcing rod improve the stability of the installation of the guide rail and enhance the strength of the entire cantilever assembly. The fourth motor can drive the second screw rod to rotate forward and backward, and thus can drive the ground gas detection assembly to move back and forth.

[0031] Furthermore, the ground gas detection assembly includes a horizontal plate, a lifting plate, a cylinder, a gas pump, and a second substrate. Third rollers are provided on the bottom surface of the horizontal plate. The third rollers are movably connected to the guide groove. The gas pump and the cylinder are both arranged on the top surface of the horizontal plate. The cylinder is connected with a boosting plate through a piston rod. The boosting plate is located below the horizontal plate. The boosting plate is fixedly connected to the lifting plate through a connecting rod. The second substrate is arranged on the lifting plate. A second lighting lamp, a second gas concentration sensor, a second battery pack, and a second camera are provided on the second substrate. The horizontal plate is connected to the guide groove through the third rollers, ensuring that the ground gas detection assembly can move horizontally back and forth along the guide rail. The gas pump can control the operation of the cylinder. The cylinder drives the boosting plate to move up and down through the piston rod, causing the connecting rod to drive the lifting plate to move up and down, so that the second substrate approaches or moves away from the ground. The second lighting lamp is used to illuminate a local area of the ground to facilitate the second camera to take pictures. The second gas concentration sensor is used to detect the concentration of the ground gas. The second battery pack is used to ensure the normal operation of the ground gas detection assembly.

[0032] Furthermore, the annular guiding assembly in step 4) includes an arc-shaped frame, a first reinforcing rod, and a rotating assembly. The two arc-shaped frames are arranged in parallel on the two support seats. The first reinforcing rods are evenly arranged between the two arc-shaped frames. The rotating assembly is arranged on the arc-shaped frame. The tunnel inner wall gas detection mechanism is connected to the rotating assembly. The first reinforcing rod improves the connection strength and stability between the two arc-shaped frames, ensuring that the tunnel inner wall gas detection mechanism can move along the arc-shaped frame and providing the accuracy for detecting the gas on the tunnel inner wall. The rotating assembly can drive the tunnel inner wall gas detection mechanism to move to achieve automatic detection.

[0033] Further, the rotating assembly includes a first motor, a first transmission rod, a driving guide wheel, an auxiliary guide wheel and a transmission belt. The first motor is fixed on the support base. The first transmission rod is connected to the support base through a support block. The output shaft of the first motor is connected to the first transmission rod through a first bevel gear set. Both ends of the first transmission rod are connected to the driving guide wheel. The auxiliary guide wheel is arranged on the outer side of the arc-shaped frame. The driving guide wheel is connected to the auxiliary guide wheel through the transmission belt. The first motor can drive the first transmission rod to rotate, and then drive the driving guide wheels on both sides to rotate, so that the transmission belt moves, and then drives the gas detection mechanism on the inner wall of the tunnel to move, meeting the gas detection requirements for the inner wall of the tunnel, improving safety. The auxiliary guide wheel improves the stability and reliability of the movement of the transmission belt.

[0034] Further, the gas detection mechanism on the inner wall of the tunnel includes a moving plate and a first substrate. Ears are symmetrically arranged on both sides of the moving plate. The ears are connected to the transmission belt through fixing blocks. Stopping strips are symmetrically arranged on both sides of the bottom surface of the moving plate. The stopping strips are limited to the arc-shaped frame. First rollers are arranged on the bottom surface of the moving plate. The first rollers support on the arc-shaped frame. A first substrate and a first battery pack are arranged on the moving plate. A first lighting lamp, a first gas concentration sensor, a signal transceiver and a first camera are arranged on the first substrate. Through the design of the ears and the fixing blocks, it can be ensured that while the transmission belt moves, it drives the moving plate to move along the arc-shaped frame. The stopping strips improve the stability and reliability of the movement of the moving plate. The first rollers can reduce the friction when the moving plate moves and reduce wear. The first battery pack is used to provide electrical energy for the first lighting lamp, the first gas concentration sensor, the signal transceiver and the first camera. The first lighting lamp is used to illuminate a local position on the inner wall of the tunnel to improve the shooting effect of the first camera. The first gas concentration sensor is used to detect the gas on the inner wall of the tunnel.

[0035] Further, both the ground gas detection component and the gas detection mechanism on the inner wall of the tunnel move at a constant speed.

[0036] Due to the adoption of the above technical solutions, the present invention has the following beneficial effects:

[0037] 1. The steps of the environmental gas detection method are simple. It not only improves the environmental gas detection efficiency of the tunnels around the gas storage reservoir, but also can quickly determine the leakage points on the inner wall and the ground of the tunnel, facilitating the timely repair of the inner wall and the ground of the tunnel. At the same time, it greatly reduces the labor intensity of manual operation and has accurate positioning.

[0038] 2. The cantilever and the fixed rod can greatly improve the stability and reliability of the installation of the guide rail, further improving the working stability of the ground gas detection component. The suspension plate and the second reinforcing rod improve the stability of the installation of the guide rail and enhance the strength of the entire cantilever assembly. The fourth motor can drive the second screw rod to rotate forward and backward, and then drive the ground gas detection component to move back and forth.

[0039] 3. The horizontal plate is connected to the guide groove through the third roller, ensuring that the ground gas detection component can move horizontally back and forth along the guide rail. The air pump can control the operation of the cylinder, and through the cylinder, drive the boost plate to move up and down via the piston rod, causing the connecting rod to drive the lifting plate to move up and down, bringing the second substrate closer to or farther away from the ground. The second lighting lamp is used to illuminate a local area of the ground, facilitating the shooting by the second camera. The second gas concentration sensor is used to detect the concentration of the ground gas, and the second battery pack is used to ensure the normal operation of the ground gas detection component.

[0040] 4. The first reinforcing rod improves the connection strength and stability between the two arc-shaped frames, ensuring that the tunnel inner wall gas detection mechanism can move along the arc-shaped frame, providing the accuracy for detecting the gas on the tunnel inner wall. The rotating component can drive the tunnel inner wall gas detection mechanism to move, realizing automatic detection.

[0041] 5. Through the design of the ear plate and the fixed block, it can be ensured that while the transmission belt moves, it drives the moving plate to move along the arc-shaped frame. The stop bar improves the stability and reliability when the moving plate moves. The first roller can reduce the friction when the moving plate moves, reducing wear. The first battery pack is used to supply electrical energy to the first lighting lamp, the first gas concentration sensor, the signal transceiver, and the first camera. The first lighting lamp is used to illuminate a local position on the tunnel inner wall, improving the shooting effect of the first camera. The first gas concentration sensor is used to detect the gas on the tunnel inner wall. Description of the Drawings

[0042] The present invention will be further described below with reference to the drawings:

[0043] Figure 1 It is a flowchart of a method for detecting the ambient gas in a tunnel around a gas storage reservoir according to the present invention;

[0044] Figure 2 It is an installation schematic diagram of the ambient gas detection device according to the present invention;

[0045] Figure 3 It is a structural schematic diagram of the ambient gas detection device according to the present invention;

[0046] Figure 4 It is Figure 3 a structural schematic diagram in the A direction in

[0047] Figure 5 It is a structural schematic diagram of the tunnel inner wall gas detection mechanism according to the present invention;

[0048] Figure 6 It is Figure 5 a structural schematic diagram in the B direction in

[0049] Figure 7 It is a schematic diagram of the internal structure of the support seat according to the present invention;

[0050] Figure 8 It is a schematic structural diagram of the ground gas detection mechanism in the present invention;

[0051] Figure 9 It is a schematic structural diagram of the ground gas detection component in the present invention.

[0052] In the figure: 1 - slide rail; 2 - gas detection device; 3 - support base; 4 - ground gas detection mechanism; 5 - annular guiding component; 6 - arc-shaped frame; 7 - first reinforcing rod; 8 - auxiliary guide wheel; 9 - transmission belt; 10 - first motor; 11 - first transmission rod; 12 - driving guide wheel; 13 - support block; 14 - tunnel inner wall gas detection mechanism; 15 - moving plate; 16 - first substrate; 17 - first lighting lamp; 18 - first gas concentration sensor; 19 - signal transceiver; 20 - first camera; 21 - first battery pack; 22 - ear plate; 23 - fixing block; 24 - retaining bar; 25 - first roller; 26 - plate body; 27 - controller; 28 - third battery pack; 29 - guiding groove; 30 - first screw rod; 31 - second transmission rod; 32 - sliding groove; 33 - second motor; 34 - third motor; 35 - second roller; 36 - third transmission rod; 37 - cantilever; 38 - second reinforcing rod; 39 - fixing rod; 40 - hanging plate; 41 - fourth motor; 42 - second screw rod; 43 - guide rail; 44 - guiding slot; 45 - ground gas detection component; 46 - horizontal plate; 47 - third roller; 48 - air pump; 49 - air cylinder; 50 - boosting plate; 51 - piston rod; 52 - connecting rod; 53 - lifting plate; 54 - second substrate; 55 - second battery pack; 56 - second gas concentration sensor; 57 - second lighting lamp; 58 - second camera. Specific embodiments

[0053] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0054] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0055] It should be noted that in the description, claims and the above-mentioned drawings of the present invention, terms such as "first" and "second" are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion.

[0056] As Figures 1 to 9 shown, a method for detecting ambient gas in a tunnel around a gas storage reservoir of the present invention includes the following steps:

[0057] 1) Laying of slide rail 1

[0058] a. First, clean both sides of the ground of the tunnel, remove the stones on the ground, and ensure that the slide rail 1 is laid horizontally;

[0059] b. Then, determine the laying length of the slide rail 1 according to the length and width of the tunnel, install the slide rail 1 in parallel along both sides of the ground of the tunnel, and install two on each side. The two ends of the slide rail 1 respectively extend 2 - 3 m beyond the tunnel entrance and exit, so that the ambient gas detection device 2 can be smoothly installed and move along the inside of the tunnel along the slide rail 1;

[0060] 2) Installation of support base 3

[0061] a. First, determine the size of the support base 3 according to the distance between the two slide rails 1 on the same side, select a plate body 26 with a suitable size, symmetrically open guide grooves 29 along one side of the plate body 26, and then symmetrically open sliding grooves 32 at the bottom of the plate body 26 that match the size of the slide rail 1. The distance between the two sliding grooves 32 matches the distance between the two slide rails 1;

[0062] b. Then, install a driving component on the plate body 26. The driving component is close to the sliding groove 32, and a height adjustment component is installed along the side close to the guide groove 29. At the same time, select a controller 27 and a third battery pack 28, install the controller 27 and the third battery pack 28 in the plate body 26, and connect them through wires. The controller 27 can use a PLC controller; the driving component can drive the entire support base 3 to move along the slide rail 1 to meet the gas detection requirements for the entire tunnel. The height adjustment component can drive the cantilever component to move up and down to facilitate adjusting the height position of the ground gas detection component 45. The controller 27 is used to control the operation of the entire gas detection device 2, and the third battery pack 28 is used for power supply.

[0063] The driving component includes a third motor 34, a third transmission rod 36 and a second roller 35. The third motor 34 is connected to the third transmission rod 36 through a third bevel gear set. The second roller 35 is arranged on the third transmission rod 36. The second roller 35 is located in the sliding groove 32. By driving the third transmission rod 36 to rotate through the third bevel gear set by the third motor 34, the second roller 35 can be driven to rotate, so that the support seat 3 moves along the slide rail 1. The third transmission rod 36 includes third transmission rods 36 that are horizontally and equally spaced, and a third transmission rod 36 arranged along the advancing direction of the support seat 3. The third motor 34 is connected to the third transmission rod 36 arranged along the advancing direction of the support seat 3 through a third bevel gear set. The third transmission rod 36 arranged along the advancing direction of the support seat 3 is connected to the third transmission rods 36 that are horizontally and equally spaced through a third bevel gear set. The second roller 35 is arranged on the third transmission rods 36 that are horizontally and equally spaced. The second roller 35 is located in the sliding groove 32. By driving the third transmission rod 36 to rotate through the third bevel gear set by the third motor 34, the second roller 35 can be driven to rotate, so that the support seat 3 moves along the slide rail 1. The bevel gear sets are not marked in the figure.

[0064] The height adjustment component includes a second motor 33, a second transmission rod 31 and a first screw rod 30. The second motor 33 is connected to the second transmission rod 31 through a second bevel gear set. The second transmission rod 31 is connected to the first screw rod 30 through a second bevel gear set. The first screw rod 30 is vertically arranged on the plate body 26. The cantilever component is connected to the first screw rod 30. By driving the first screw rod 30 to rotate through the second transmission rod 31 by the second motor 33, the cantilever component can be driven to move up and down, so as to adjust the height position of the ground gas detection mechanism 4.

[0065] c. Then place the installed support seat 3 on the slide rail 1, with the side having the guide groove 29 away from the tunnel inner wall;

[0066] 3) Installation of the ground gas detection mechanism 4

[0067] a. First, move the two support seats 3 to be in the same vertical plane, measure the horizontal distance between the two support seats 3, and then determine the size of the cantilever assembly according to the horizontal distance, and fabricate the corresponding cantilever assembly. The cantilever assembly includes a guide rail 43, a suspension plate 40, cantilevers 37, a fourth motor 41, and a second screw rod 42. A second reinforcing rod 38 is provided between the two cantilevers 37 on the same side. Fixed rods 39 are connected to both of the two cantilevers 37 on the same side. A guide rail 43 is provided between the two opposite fixed rods 39. A guide groove 44 is provided on the guide rail 43. A suspension plate 40 is provided between the two fixed rods 39 on the same side. The fourth motor 41 is provided on the suspension plate 40. The second screw rod 42 connects the fourth motor 41 and the ground gas detection assembly 45. The second screw rod 42 is connected to the two suspension plates 40. The cantilevers 37 and the fixed rods 39 can greatly improve the stability and reliability of the installation of the guide rail 43, and further improve the stability of the operation of the ground gas detection assembly 45. The suspension plate 40 and the second reinforcing rod 38 improve the stability of the installation of the guide rail 43 and enhance the strength of the entire cantilever assembly. The fourth motor 41 can drive the second screw rod 42 to rotate forward and backward, and thus can drive the ground gas detection assembly 45 to move back and forth.

[0068] b. Then, install the two ends of the cantilever assembly on the support seats 3 on both sides, connect the cantilever assembly to the height adjustment assembly, and then cover it along the top of the plate body 26 with a cover plate. Use screws to fixedly install the cover plate to the plate body 26.

[0069] c. Next, determine the size of the ground gas detection component 45 according to the size of the cantilever component, process the corresponding ground gas detection component 45, install the ground gas detection component 45 on the cantilever component, and electrically connect both the ground gas detection component 45 and the cantilever component to the controller 27; the ground gas detection component 45 includes a horizontal plate 46, a lifting plate 53, a cylinder 49, an air pump 48, and a second substrate 54. A third roller 47 is provided on the bottom surface of the horizontal plate 46, and the third roller 47 is movably connected to the guide groove 44. The air pump 48 and the cylinder 49 are both provided on the top surface of the horizontal plate 46. The cylinder 49 is connected with a booster plate 50 through a piston rod 51. The booster plate 50 is located below the horizontal plate 46. The booster plate 50 is fixedly connected to the lifting plate 53 through a connecting rod 52. The second substrate 54 is provided on the lifting plate 53. A second illuminating lamp 57, a second gas concentration sensor 56, a second battery pack 55, and a second camera 58 are provided on the second substrate 54. The horizontal plate 46 is connected to the guide groove 44 through the third roller 47, ensuring that the ground gas detection component 45 can move horizontally back and forth along the guide rail 43. The air pump 48 can control the operation of the cylinder 49. The cylinder 49 drives the booster plate 50 to move up and down through the piston rod 51, causing the connecting rod 52 to drive the lifting plate 53 to move up and down, so that the second substrate 54 approaches or moves away from the ground. The second illuminating lamp 57 is used to illuminate a local area of the ground to facilitate the shooting by the second camera 58. The second gas concentration sensor 56 is used to detect the concentration of the ground gas. The second battery pack 55 is used to ensure the normal operation of the ground gas detection component 45. The gas in the gas storage tank mainly refers to methane, sulfur dioxide, and hydrogen sulfide gases. Therefore, the corresponding first gas concentration sensor 18 can select a KG9701B type methane sensor, an MP-4 methane sensor, an ME3-SO2 sulfur dioxide sensor, a SO2-B4 sulfur dioxide sensor, an H2S / S-200 hydrogen sulfide sensor.

[0070] 4) Installation of the tunnel inner wall gas detection mechanism 14

[0071] a. First, determine the size of the annular guiding component 5 according to the inner wall radian of the tunnel, and splice the corresponding annular guiding component 5, and install the processed annular guiding component 5 between the two support seats 3; the annular guiding component 5 includes an arc-shaped frame 6, a first reinforcing rod 7, and a rotating component. The two arc-shaped frames 6 are arranged in parallel between the two support seats 3. The first reinforcing rod 7 is evenly arranged between the two arc-shaped frames 6. The rotating component is arranged on the arc-shaped frame 6. The tunnel inner wall gas detection mechanism 14 is connected to the rotating component. The first reinforcing rod 7 improves the connection strength and stability between the two arc-shaped frames 6, ensuring that the tunnel inner wall gas detection mechanism 14 can move along the arc-shaped frame 6, providing the accuracy for detecting the gas on the tunnel inner wall. The rotating component can drive the tunnel inner wall gas detection mechanism 14 to move to achieve automatic detection.

[0072] The rotating assembly includes a first motor 10, a first transmission rod 11, a driving guide wheel 12, an auxiliary guide wheel 8, and a transmission belt 9. The first motor 10 is fixed on the support base 3. The first transmission rod 11 is connected to the support base 3 through a support block 13. The output shaft of the first motor 10 is connected to the first transmission rod 11 through a first bevel gear set. Both ends of the first transmission rod 11 are connected to the driving guide wheel 12. The auxiliary guide wheel 8 is arranged on the outer side surface of the arc-shaped frame 6. The driving guide wheel 12 is connected to the auxiliary guide wheel 8 through the transmission belt 9. The first motor 10 can drive the first transmission rod 11 to rotate, and then drive the driving guide wheels 12 on both sides to rotate, so that the transmission belt 9 moves, and then drives the gas detection mechanism 14 on the inner wall of the tunnel to move, meeting the gas detection requirements for the inner wall of the tunnel, improving safety. The auxiliary guide wheel 8 improves the stability and reliability of the movement of the transmission belt 9.

[0073] b. Then, determine the size of the gas detection mechanism 14 on the inner wall of the tunnel according to the distance between the annular guiding assembly 5 and the inner wall of the tunnel, and install the gas detection mechanism 14 on the inner wall of the tunnel on the annular guiding assembly 5. Both the annular guiding assembly 5 and the gas detection mechanism 14 on the inner wall of the tunnel are electrically connected to the controller 27 in the support base 3; both the ground gas detection assembly 45 and the gas detection mechanism 14 on the inner wall of the tunnel move at a constant speed.

[0074] The gas detection mechanism 14 for the inner wall of the tunnel includes a moving plate 15 and a first substrate 16. On both sides of the moving plate 15, ear plates 22 are symmetrically arranged. The ear plates 22 are connected to the transmission belt 9 through fixing blocks 23. On both sides of the bottom surface of the moving plate 15, retaining strips 24 are symmetrically arranged. The retaining strips 24 are limited to the arc-shaped frame 6. On the bottom surface of the moving plate 15, first rollers 25 are arranged. The first rollers 25 are supported on the arc-shaped frame 6. On the moving plate 15, there are a first substrate 16 and a first battery pack 21. On the first substrate 16, there are a first lighting lamp 17, a first gas concentration sensor 18, a signal transceiver 19, and a first camera 20. Through the design of the ear plates 22 and the fixing blocks 23, it can be ensured that while the transmission belt 9 moves, it drives the moving plate 15 to move along the arc-shaped frame 6. The retaining strips 24 improve the stability and reliability of the moving plate 15 during movement. The first rollers 25 can reduce the friction when the moving plate 15 moves and reduce wear. The first battery pack 21 is used to supply electrical energy to the first lighting lamp 17, the first gas concentration sensor 18, the signal transceiver 19, and the first camera 20. The first lighting lamp 17 is used to illuminate a local position on the inner wall of the tunnel to improve the shooting effect of the first camera 20. The signal transceiver 19 is used to receive and send signals to the control end. The signal transceiver 19 can be a wireless DMX512 signal transceiver 19. The first gas concentration sensor 18 is used to detect the gas on the inner wall of the tunnel. The gas in the gas storage tank mainly refers to methane, sulfur dioxide, and hydrogen sulfide gases. Therefore, the corresponding first gas concentration sensor 18 can select a KG9701B type methane sensor, an MP-4 methane sensor, an ME3-SO2 sulfur dioxide sensor, an SO2-B4 sulfur dioxide sensor, an H2S / S-200 hydrogen sulfide sensor.

[0075] 5) Tunnel gas detection

[0076] a. First, conduct the circuits of the support base 3, the ground gas detection mechanism 4, the annular guiding component 5, and the gas detection mechanism 14 for the inner wall of the tunnel. Through the control terminal, control the height adjustment component to descend, so that the cantilever component approaches the ground of the tunnel until the ground gas detection component 45 is at a height of 20 - 30 cm from the ground. Then start the ground gas detection component 45, and make the ground gas detection component 45 move back and forth along the width direction of the tunnel on the cantilever component at a speed of 1 - 2 m / min.

[0077] b. Then start the annular guiding component 5, so that the gas detection mechanism 14 for the inner wall of the tunnel moves along the inner wall of the tunnel in an arc at a speed of 0.5 - 1 m / min under the action of the annular guiding component 5.

[0078] c. After the local gas detection mechanism 4 and the tunnel inner wall gas detection mechanism 14 complete the detection in the same vertical plane, start the drive assembly in the support base 3 to drive the local gas detection mechanism 4 and the tunnel inner wall gas detection mechanism 14 to move a distance in the length direction of the support base 3 along the slide rail 1, and simultaneously detect the ground and inner wall of the tunnel in the next vertical plane. When the types and concentrations of gases are detected on the ground and / or inner wall of the tunnel, send a signal to the control terminal;

[0079] d. After the environmental gas detection of the entire tunnel is completed, remove the support base 3 and remove the slide rail 1.

[0080] The steps of this environmental gas detection method are simple. It not only improves the detection efficiency of the environmental gas in the tunnel around the gas storage, but also can quickly determine the leakage points on the inner wall and ground of the tunnel, facilitating the timely repair of the inner wall and ground of the tunnel. At the same time, it greatly reduces the labor intensity of manual operation and has accurate positioning.

[0081] The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions or modifications made based on the present invention to achieve substantially the same technical effects are all covered by the protection scope of the present invention.

Claims

1. An environmental gas detection method for tunnels around a gas storage reservoir, characterized in that it includes the following steps: 1) Rail laying a. First, clean the two sides of the tunnel floor to ensure that the rails are laid horizontally; b. Then, determine the laying length of the rails according to the length and width of the tunnel, and install the rails in parallel along the two sides of the tunnel floor, with two rails installed on each side; 2) Support seat installation a. First, determine the size of the support seat according to the distance between the two rails on the same side, select a plate body with a suitable size, symmetrically open guide grooves along one side of the plate body, and then symmetrically open chutes at the bottom of the plate body that match the size of the rails. The distance between the two chutes matches the distance between the two rails; b. Then, install a driving component on the plate body. The driving component is close to the chute, and a height adjustment component is installed along the side close to the guide groove. At the same time, select a controller and a third battery pack, install the controller and the third battery pack in the plate body, and connect them through wires; c. Next, place the installed support seat on the rails, with the side with the guide groove facing away from the tunnel inner wall; 3) Installation of the ground gas detection mechanism a. First, move the two support seats to the same vertical plane, measure the horizontal distance between the two support seats, and then determine the size of the cantilever assembly according to the horizontal distance, and fabricate the corresponding cantilever assembly; b. Then, install the two ends of the cantilever assembly on the support seats on both sides, connect the cantilever assembly with the height adjustment component, and then cover the top of the plate body with a cover plate, and fix the cover plate to the plate body with screws; c. Next, determine the size of the ground gas detection component according to the size of the cantilever assembly, process the corresponding ground gas detection component, install the ground gas detection component on the cantilever assembly, and electrically connect the ground gas detection component and the cantilever assembly to the controller; The ground gas detection mechanism includes the cantilever assembly and the ground gas detection component; The cantilever assembly includes a guide rail, a hanging plate, a cantilever, a fourth motor, and a second screw rod. A second reinforcing rod is provided between the two cantilevers on the same side. Fixed rods are connected to both of the two cantilevers on the same side. The guide rail is provided between the two opposite fixed rods. A guide groove is provided on the guide rail. The hanging plate is provided between the two fixed rods on the same side. The fourth motor is provided on the hanging plate. The second screw rod connects the fourth motor and the ground gas detection component, and the second screw rod is connected to the two hanging plates; The ground gas detection component includes a horizontal plate, a lifting plate, a cylinder, a gas pump, and a second substrate. Third rollers are provided on the bottom surface of the horizontal plate. The third rollers are movably connected to the guide groove. The gas pump and the cylinder are both provided on the top surface of the horizontal plate. The cylinder is connected with a boosting plate through a piston rod. The boosting plate is located below the horizontal plate. The boosting plate is fixedly connected to the lifting plate through a connecting rod. The second substrate is provided on the lifting plate. A second illuminating lamp, a second gas concentration sensor, a second battery pack, and a second camera are provided on the second substrate; 4) Installation of the tunnel inner wall gas detection mechanism a. First, determine the size of the annular guiding component according to the inner wall radian of the tunnel, splice the corresponding annular guiding component, and install the processed annular guiding component between two support seats; b. Then, determine the size of the tunnel inner wall gas detection mechanism according to the distance between the annular guiding component and the tunnel inner wall, and install the tunnel inner wall gas detection mechanism on the annular guiding component. Both the annular guiding component and the tunnel inner wall gas detection mechanism are electrically connected to the controller in the support seat; The annular guiding component includes an arc-shaped frame, a first reinforcing rod, and a rotating component. The two arc-shaped frames are arranged in parallel on the two support seats. The first reinforcing rod is evenly arranged between the two arc-shaped frames. The rotating component is arranged on the arc-shaped frame. The tunnel inner wall gas detection mechanism is connected to the rotating component; The rotating component includes a first motor, a first transmission rod, a driving guide wheel, an auxiliary guide wheel, and a transmission belt. The first motor is fixed on the support seat. The first transmission rod is connected to the support seat through a support block. The output shaft of the first motor is connected to the first transmission rod through a first bevel gear set. The two ends of the first transmission rod are connected to the driving guide wheel. The auxiliary guide wheel is arranged on the outer side surface of the arc-shaped frame. The driving guide wheel is connected to the auxiliary guide wheel through the transmission belt; The tunnel inner wall gas detection mechanism includes a moving plate and a first substrate. Ears are symmetrically arranged on both sides of the moving plate. The ears are connected to the transmission belt through fixing blocks. Stopping strips are symmetrically arranged on both sides of the bottom surface of the moving plate. The stopping strips are limited to the arc-shaped frame. First rollers are arranged on the bottom surface of the moving plate. The first rollers support on the arc-shaped frame. A first substrate and a first battery pack are arranged on the moving plate. A first lighting lamp, a first gas concentration sensor, a signal transceiver, and a first camera are arranged on the first substrate; 5) Tunnel gas detection a. First, conduct the circuits of the support seat, the ground gas detection mechanism, the annular guiding component, and the tunnel inner wall gas detection mechanism. Control the height adjustment component to descend through the control terminal, so that the cantilever component approaches the ground of the tunnel until the ground gas detection component is 20 - 30 cm above the ground. Then start the ground gas detection component, and make the ground gas detection component move back and forth along the width direction of the tunnel on the cantilever component at a speed of 1 - 2 m / min; b. Then start the annular guiding component, so that the tunnel inner wall gas detection mechanism makes an arc movement along the tunnel inner wall at a speed of 0.5 - 1 m / min under the action of the annular guiding component; c. After the ground gas detection mechanism and the tunnel inner wall gas detection mechanism complete the detection in the same vertical plane, start the driving component in the support seat, drive the ground gas detection mechanism and the tunnel inner wall gas detection mechanism to move a distance in the length direction of a support seat along the slide rail, and simultaneously detect the ground and the inner wall of the tunnel in the next vertical plane. When the type and concentration of gas are detected on the ground and / or the inner wall of the tunnel, send a signal to the control terminal; d. After the environmental gas detection of the entire tunnel is completed, remove the support seat and remove the slide rail.

2. The environmental gas detection method for a tunnel around a gas storage reservoir according to claim 1, characterized in that: The driving assembly in step 2) includes a third motor, a third transmission rod and a second roller. The third motor is connected to the third transmission rod through a third bevel gear set. The second roller is arranged on the third transmission rod, and the second roller is located in the chute.

3. The environmental gas detection method for a tunnel around a gas storage reservoir according to claim 1, characterized in that: The height adjustment assembly in step 2) includes a second motor, a second transmission rod and a first screw rod. The second motor is connected to the second transmission rod through a second bevel gear set. The second transmission rod is connected to the first screw rod through the second bevel gear set. The first screw rod is vertically arranged on the plate body, and the cantilever assembly is connected to the first screw rod.

4. The environmental gas detection method for a tunnel around a gas storage reservoir according to claim 1, characterized in that: Both the ground gas detection assembly and the tunnel inner wall gas detection mechanism move at a uniform speed.

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