Device and method for testing dissipation of gas in jacking pipe driven by wind

Abstract

The invention discloses a test device and method for wind-driven dissipation of gas in a jacking pipe, and relates to the technical field of jacking pipe construction. The device comprises a test tube with one open end and one closed end, the closed end of the test tube is communicated with a test gas generation system, an air duct extending in the axial direction of the test tube is arranged in the test tube, and the end, facing the open end of the test tube, of the air duct is communicated with a ventilation system. And a plurality of test gas monitoring systems are arranged in the test tube at intervals along the axial direction. According to the test device for the dissipation of the gas in the jacking pipe driven by the wind, the dissipation behavior of the harmful gas under the ventilation driving effect after leakage can be accurately simulated, the mutual relation between the dissipation of the harmful gas and the ventilation driving wind flow is mastered, a scientific basis is provided for the scheme design of a ventilation system for jacking pipe construction, and the working efficiency is improved. And the ventilation effect is improved.

Description

Technical Field

[0001] The present application relates to the technical field of pipe jacking construction, and in particular to a test device and method for the escape of wind-driven gas inside a pipe jacking. Background Art

[0002] Pipe jacking is a construction method that uses the jacking force generated by jacking equipment in the working pit to overcome the friction between the pipeline and the surrounding soil and push the pipeline into the soil according to the designed slope. Due to the limitations of the urban surface environment, pipe jacking construction often faces the situation of long-distance construction.

[0003] Compared with urban underground projects such as subway shield tunnels and pipe galleries, the cross-sectional dimensions of pipes used in pipe jacking construction are significantly smaller, which results in a small internal space for the pipe jacking machine, slow air circulation, and poor air quality. In extreme cases, the tunneling head may drill through a natural gas pipeline or industrial pipeline, causing a large influx of toxic and harmful gases. These gases enter the tunneling head at the front end through the tunneling face, and then enter the pipe section through the tool pipe, seriously endangering the health and life safety of construction workers.

[0004] In order to ensure the safety of construction workers, ventilation facilities are often configured, such as using high-power fans to press air from the external environment of the jacking pipe into or extract the air inside the jacking pipe to disperse harmful gases. However, on-site construction ventilation often relies on construction experience and lacks scientific basis, resulting in the ventilation capacity of the ventilation system being unable to quickly disperse and discharge harmful gases, resulting in poor ventilation effect. Summary of the invention

[0005] The purpose of the present application is to provide a device and method for testing the escape of gas from inside a pipe driven by wind, so as to solve the problem that the existing ventilation measures for pipes rely on experience and result in poor ventilation effects.

[0006] The technical solution adopted by this application to solve its technical problem is:

[0007] In a first aspect, a test device for the escape of gas inside a top pipe driven by wind is provided, comprising a test tube with one end open and the other end closed, the closed end of the test tube being connected to a test gas generating system, a wind tube extending along its axial direction being provided inside the test tube, the end of the wind tube facing the open end of the test tube being connected to a ventilation system, and a plurality of test gas monitoring systems being provided inside the test tube along the axial direction at intervals.

[0008] Furthermore, the test gas generating system includes a test gas storage tank, a test gas flowmeter and a test gas pipe, the outlet of the test gas storage tank is connected to the test gas pipe through the test gas flowmeter, and the test gas pipe is connected to the closed end of the test pipe.

[0009] Furthermore, the ventilation system includes a variable frequency fan and a wind speed detector, the variable frequency fan is connected to the wind duct, and the wind speed detector is arranged on the wind duct.

[0010] Furthermore, the wind tube is composed of a plurality of wind tube segments spliced ​​together.

[0011] Furthermore, the test gas monitoring system can move along the axial direction of the test tube.

[0012] Furthermore, a slide rail is provided in the test tube along its axial direction, and the test gas monitoring system is slidably fitted on the slide rail.

[0013] Furthermore, the test gas monitoring system includes a sliding foot slidably matched with the slide rail, a vertical rod connected to the sliding foot, a cross rod connected to the vertical rod, and a test gas monitoring sensor connected to the cross rod.

[0014] Furthermore, a plurality of cross bars are arranged on the vertical bar at intervals along the axial direction thereof, and a plurality of the test gas monitoring sensors are arranged on the cross bars.

[0015] Furthermore, it also includes terminal equipment, which is respectively connected to the test gas generating system, the ventilation system and the test gas monitoring system.

[0016] In a second aspect, a method for testing the escape of gas from a jacking pipe under wind-driven conditions is provided. The device for testing the escape of gas from a jacking pipe under wind-driven conditions provided in the first aspect is used. The method comprises:

[0017] A ventilation system is used to drive air flow to discharge the gas in the test tube to the outside of the tube; a test gas generating system is used to deliver the test gas into the test tube; several test gas monitoring systems are used to monitor the test gas data at various positions in the test tube in real time; and the relationship between the test gas escape and ventilation is obtained based on the monitored test gas data.

[0018] Beneficial effects of this application:

[0019] The embodiments of the present application provide a device and method for testing the wind-driven escape of gas inside a pipe jacking. A test gas generating system is used to deliver test gas into a test pipe to simulate the leakage of harmful gas into the pipe jacking. A ventilation system is used to drive air flow to discharge the gas in the test pipe to the outside of the pipe. Several test gas monitoring systems are used to monitor the test gas data at various positions in the test pipe in real time. This can accurately simulate the escape behavior of harmful gas under the action of ventilation after leakage, understand the relationship between the escape of harmful gas and ventilation-driven windflow, provide a scientific basis for the design of ventilation system for pipe jacking construction, and thus improve the ventilation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 2. It is a front view of a test device for the escape of gas from a top pipe driven by wind provided in an embodiment of the present application;

[0022] Figure 2 is a side view of a test device for the escape of gas from a top pipe driven by wind provided in an embodiment of the present application;

[0023] Figure 3 It is a schematic diagram of the structure of the connection between the test gas monitoring system and the slide rail;

[0024] Figure 4 It is a schematic diagram of the structure connecting the vertical rod and the horizontal rod;

[0025] Figure 5 It is a structural diagram of the connection between the slide rail and the slide foot.

[0026] Reference numerals:

[0027] 1- Test tube;

[0028] 11-tube segment;

[0029] 12- pipe joint plugging plate;

[0030] 13- pipe joint support;

[0031] 2-Test gas generation system;

[0032] 21-Test gas storage tank;

[0033] 22-Test gas flow meter;

[0034] 23-Test gas pipe;

[0035] 3-Hair duct;

[0036] 31-wind tube segment;

[0037] 32-air duct support frame;

[0038] 4- Ventilation system;

[0039] 41- variable frequency fan;

[0040] 42- Wind speed detector;

[0041] 5-Test gas monitoring system;

[0042] 51-slip feet;

[0043] 52-vertical bar;

[0044] 53- horizontal bar;

[0045] 54-Test gas monitoring sensor;

[0046] 55-pipe clamp;

[0047] 56- strong and weak electric wires;

[0048] 57-Data cloud box;

[0049] 58-Internet of Things;

[0050] 6- Slide rail;

[0051] 7-Terminal equipment. DETAILED DESCRIPTION

[0052] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0053] In the description of this application, the terms "upper", "lower", "left", "right", "front", "back", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on this application. Unless otherwise specified, the above-mentioned directional descriptions can be flexibly set in the process of actual application under the condition that the relative positional relationship shown in the accompanying drawings is satisfied.

[0054] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0055] With the acceleration of urbanization, the demand for underground pipelines continues to increase. Pipe jacking construction, as a trenchless construction technology, is widely used because of its low impact on traffic and the environment and high construction efficiency. However, there are many challenges in the process of pipe jacking construction, especially the ventilation problem in long distances and narrow spaces, which seriously affects the health and life safety of construction workers.

[0056] Pipe jacking is a construction method that uses the jacking force generated by jacking equipment in the working pit to overcome the friction between the pipeline and the surrounding soil and push the pipeline into the soil according to the designed slope. Due to the limitations of the urban surface environment, pipe jacking construction often faces the situation of long-distance construction.

[0057] Compared with urban underground projects such as subway shield tunnels and pipe galleries, the cross-sectional dimensions of pipes used in pipe jacking construction are significantly smaller, which results in a small internal space for the pipe jacking machine, slow air circulation, and poor air quality. In extreme cases, the tunneling head may drill through a natural gas pipeline or industrial pipeline, causing a large influx of toxic and harmful gases. These gases enter the tunneling head at the front end through the tunneling face, and then enter the pipe section through the tool pipe, seriously endangering the health and life safety of construction workers.

[0058] In order to ensure the safety of construction workers, ventilation facilities are often configured, such as using high-power fans to press air from the external environment of the jacking pipe into or extract the air inside the jacking pipe to disperse harmful gases. However, on-site construction ventilation often relies on construction experience and lacks scientific basis, resulting in the ventilation capacity of the ventilation system being unable to quickly disperse and discharge harmful gases, resulting in poor ventilation effect.

[0059] In the prior art, CFD numerical calculation can be used to simulate the escape of harmful gases. For example, the Fluent software simulation technology can be used to study the concentration distribution characteristics of harmful gases in the pipe cabin under different driving wind flow conditions. Fluent is integrated in ANSYS Workbench to realize the parameterized simulation process, including the entire process of geometric modeling, meshing, calculation and solution, post-processing and optimization. In terms of multi-physics field coupling, Fluent is seamlessly coupled with ANSYS structural, electromagnetic, display dynamics and other modules. However, the CFD simulation results need to be compared with the test data to evaluate the accuracy of the CFD simulation. If the simulation results are poorly consistent with the test data, it is believed that the numerical simulation model cannot reflect the actual problem. Therefore, CFD numerical calculation is based on computer software functions. Although it is convenient and fast to operate and can realize the simulation of harmful gas escape under various working conditions, the reliability of the numerical model still needs to be verified by other tests.

[0060] Based on this, see Figure 1 , Figure 2An embodiment of the present application provides a test device for the escape of gas from inside a top pipe driven by wind, comprising a test tube 1 which is open at one end and closed at the other end, the closed end of the test tube 1 being connected to a test gas generating system 2, a wind tube 3 extending along its axial direction being provided inside the test tube 1, the end of the wind tube 3 facing the open end of the test tube 1 being connected to a ventilation system 4, and a plurality of test gas monitoring systems 5 being provided inside the test tube 1 along its axial direction at intervals.

[0061] The test pipe 1 is arranged horizontally to simulate the jacking pipe in construction. The test pipe 1 is a structure with one end open and the other end closed. The open end is connected to the external environment to enable air exchange, and the closed end is used to simulate the face. Exemplarily, the test pipe 1 may include a plurality of pipe sections 11 and a pipe section plugging plate 12. The plurality of pipe sections 11 are spliced ​​together to form a tubular structure with both ends open. The pipe section plugging plate 12 is fixed to one end of the tubular structure to plug one end of the tubular structure. Among them, the pipe section 11 and the pipe section plugging plate 12 can both be made of a skeleton and a skin. The test pipe 1 may also include at least two pipe section supports 13. The tubular structure formed by splicing a plurality of pipe sections 11 is supported on at least two pipe section supports 13.

[0062] The test gas generating system 2 is connected to the closed end of the test pipe 1, and is used to transport the test gas from the closed end of the test pipe 1 to the inner cavity of the test pipe 1 to simulate the situation where harmful gas leaks from the tunnel face into the top pipe. Exemplarily, the pipe joint plugging plate 12 is provided with a test gas connecting hole, and the test gas generating system 2 is connected to the inner cavity of the test pipe 1 through the test gas connecting hole.

[0063] The test gas may include carbon dioxide. Carbon dioxide is a colorless, odorless, non-toxic gas. It is safer to use carbon dioxide for testing and will not harm the health of test personnel. At the same time, carbon dioxide exists naturally in the atmosphere and will not pollute the environment. Of course, the test gas may also use other gases that will not harm the health of test personnel, such as inert gases.

[0064] The wind tube 3 is a tubular structure with both ends open, and the wind tube 3 is arranged in the test tube 1 along the axial direction of the test tube 1. Exemplarily, a wind tube support frame 32 is fixed to the inner surface of the test tube 1, and the wind tube 3 is supported on the wind tube support frame 32. The end of the wind tube 3 facing the closed end of the test tube 1 is the first end, and the end of the wind tube 3 facing the open end of the test tube 1 is the second end. The second end of the wind tube 3 is connected to the ventilation system 4 arranged outside the test tube 1.

[0065] The ventilation system 4 is used to drive the air flow to discharge the gas in the test tube 1 to the outside of the tube. The ventilation system 4 can adopt a forced ventilation method to send the air outside the test tube 1 into the test tube 1 through the air duct 3 to discharge the gas in the test tube 1 from the open end of the test tube 1 to the outside of the tube. The ventilation system 4 can also adopt an inhalation ventilation method to suck the gas in the test tube 1 into the air duct 3 through the first end of the air duct 3, then suck it into the ventilation system 4 through the air duct 3, and discharge it to the outside of the tube through the outlet of the ventilation system 4.

[0066] The test gas monitoring system 5 is arranged in the test tube 1, and is used to monitor the test gas data in the test tube 1 in real time, such as the concentration, temperature, humidity and other data of the test gas. By arranging a plurality of test gas monitoring systems 5 in the test tube 1 along its axial direction, the test gas data at different positions in the test tube 1 can be monitored in real time.

[0067] The embodiment of the present application provides a test device for the wind-driven escape of gas inside a top pipe. A test gas generating system 2 is used to deliver test gas into a test pipe 1 to simulate the leakage of harmful gas into the top pipe. A ventilation system 4 is used to drive air flow to discharge the gas in the test pipe 1 to the outside of the pipe. A plurality of test gas monitoring systems 5 are used to monitor the test gas data at various positions in the test pipe 1 in real time. This can accurately simulate the escape behavior of harmful gas under the action of ventilation after leakage, understand the relationship between the escape of harmful gas and the ventilation-driven wind flow, provide a scientific basis for the design of ventilation system for top pipe construction, and thus improve the ventilation effect.

[0068] During the test, the wind-driven escape test device for internal gas in the top pipe provided in the embodiment of the present application can be used to carry out simulation tests under different working conditions: 1. The ventilation mode and air volume of the ventilation system 4, and the distance between the first end of the wind duct 3 and the closed end of the test pipe 1 are adjusted to simulate the influence of the ventilation system 4 with different ventilation capacities on the escape behavior of harmful gases; 2. The flow rate of the test gas delivered by the test gas generating system 2 to the test pipe 1 is adjusted to simulate the escape behavior of harmful gases with different flow rates driven by wind.

[0069] Therefore, by simulating the escape of harmful gases in the top pipe under the action of driven wind flow through the device of the present application, the escape law of harmful gases can be studied, which will help improve the understanding and prediction ability of the harmful gas escape process, and provide a theoretical basis and decision-making support for emergency planning, management and post-disaster handling of harmful gas leakage accidents.

[0070] In some embodiments, see Figure 1 The test gas generating system 2 includes a test gas storage tank 21, a test gas flow meter 22 and a test gas pipe 23. The outlet of the test gas storage tank 21 is connected to the test gas pipe 23 through the test gas flow meter 22, and the test gas pipe 23 is connected to the closed end of the test tube 1.

[0071] Exemplarily, the test gas storage tank 21 stores test gas at a certain pressure, and an outlet valve is provided on the test gas storage tank 21. The outlet valve can be used to control the flow of the test gas. The outlet valve is connected to the inlet of the test gas flowmeter 22, and the test gas flowmeter 22 is used to monitor the flow of the test gas in real time. Among them, the test gas pipe 23 can include a test gas main pipe connected to the outlet of the test gas flowmeter 22, and a plurality of test gas branches connected to the test gas main pipe through a multi-way joint. A plurality of test gas connecting holes are arranged in an array on the pipe joint plugging plate 12, and a plurality of test gas branches correspond to a plurality of test gas connecting holes one by one, and the test gas branches are connected to the corresponding test gas connecting holes.

[0072] During the test, the outlet valve on the test gas storage tank 21 is opened, and the test gas in the test gas storage tank 21 is sequentially delivered to the inner cavity of the test tube 1 through the test gas flow meter 22, the test gas main pipe, and the test gas branch pipe. During the test, the flow rate of the test gas delivered to the test tube 1 is adjusted by the outlet valve to simulate the dissipation behavior of harmful gases with different flow rates driven by wind.

[0073] In some embodiments, see Figure 1 The ventilation system 4 includes a variable frequency fan 41 and a wind speed detector 42 . The variable frequency fan 41 is connected to the wind tube 3 , and the wind speed detector 42 is arranged on the wind tube 3 .

[0074] The variable frequency fan 41 can adjust the air volume and meet both push-in and exhaust ventilation requirements. The variable frequency fan 41 is arranged outside the test tube 1 and is connected to the second end of the wind tube 3 through a connecting tube. During the test, the variable frequency fan 41 is started, and the variable frequency fan 41 is used to drive the air flow to discharge the gas in the test tube 1 to the outside of the tube. The wind speed detector 42 can monitor the wind speed in the wind tube 3 in real time. During the test, the ventilation mode and air volume of the variable frequency fan 41 and the distance between the first end of the wind tube 3 and the closed end of the test tube 1 are adjusted to simulate the influence of the ventilation system 4 with different ventilation capabilities on the escape behavior of harmful gases.

[0075] During the test, the air cylinder 3 can be controlled to move along the axial direction of the test tube 1 to adjust the distance between the first end of the air cylinder 3 and the closed end of the test tube 1 .

[0076] In some embodiments, see Figure 1 The wind tube 3 is composed of a plurality of wind tube segments 31. For example, the plurality of wind tube segments 31 are spliced ​​together using a detachable structure. Thus, by increasing or decreasing the number of wind tube segments 31, the distance between the first end of the wind tube 3 and the closed end of the test tube 1 can be quickly adjusted, while reducing the workload and improving the test efficiency.

[0077] In some embodiments, the test gas monitoring system 5 is movable along the axial direction of the test tube 1 .

[0078] Accordingly, the test gas monitoring system 5 moves along the axial direction of the test tube 1, so that the test gas monitoring system 5 can monitor different positions in the test tube 1, ensuring that the test gas data in the test tube 1 can be fully monitored, which helps to discover local abnormalities and improve the comprehensiveness and accuracy of monitoring. During the test, if it is necessary to focus on monitoring a specific area, the test gas monitoring system 5 can be flexibly moved to the area for high-precision local monitoring. This flexibility enables the test gas monitoring system 5 to adapt to different test needs and improve the pertinence and effectiveness of monitoring.

[0079] The test gas monitoring system 5 can be directly placed at the bottom of the inner cavity of the test tube 1. During the test, the test gas monitoring system 5 is manually placed at different positions in the inner cavity of the test tube 1 to achieve the purpose of axial movement of the test gas monitoring system 5 along the test tube 1.

[0080] In some embodiments, Figure 1 , Figure 2 A slide rail 6 is provided in the test tube 1 along its axial direction, and the test gas monitoring system 5 is slidably fitted on the slide rail 6. Accordingly, during the test, the position of the test gas monitoring system 5 in the test tube 1 can be adjusted by simply controlling the test gas monitoring system 5 to slide along the slide rail 6.

[0081] For example, see Figure 2 , Figure 3 , Figure 4 , Figure 5 The test gas monitoring system 5 includes a slide foot 51 slidably matched with the slide rail 6, a vertical rod 52 connected to the slide foot 51, a horizontal rod 53 connected to the vertical rod 52, and a test gas monitoring sensor 54 connected to the horizontal rod 53. The lower end of the vertical rod 52 can be fixedly connected to the slide foot 51 by bolts, and the horizontal rod 53 can be fixedly connected to the vertical rod 52 by a pipe clamp 55.

[0082] Accordingly, the test gas monitoring sensor 54 is used to monitor the test gas data in the test tube 1. The design of the vertical rod 52 and the horizontal rod 53 provides a stable support structure to ensure that the test gas monitoring sensor 54 remains stable during movement and reduces measurement errors caused by vibration or shaking. The sliding fit design of the sliding foot 51 and the slide rail 6 allows the test gas monitoring sensor 54 to move freely along the axial direction of the test tube 1, thereby monitoring different positions in the test tube 1.

[0083] A plurality of cross bars 53 are arranged at intervals along the axial direction of the vertical bar 52, and a plurality of test gas monitoring sensors 54 are arranged on the cross bars 53. Both the vertical bar 52 and the cross bar 53 are perpendicular to the axial direction of the test tube 1.

[0084] Accordingly, by setting a plurality of horizontal bars 53 on the vertical bar 52 and setting a plurality of test gas monitoring sensors 54 on each horizontal bar 53, the test gas data at different positions in the corresponding section of the test tube 1 can be monitored in all directions, which helps the test personnel to have a more comprehensive understanding of the test gas escape situation in the test tube 1, discover potential local abnormal areas, and improve the comprehensiveness and accuracy of monitoring.

[0085] In some embodiments, see Figure 1 , Figure 2 , and also includes a terminal device 7, which is connected to the test gas generating system 2, the ventilation system 4 and the test gas monitoring system 5 respectively.

[0086] Accordingly, the terminal device 7 can centrally control the test gas generating system 2, the ventilation system 4 and the test gas monitoring system 5, realize the unified management and control of the whole test process, and the test personnel can easily adjust the test gas flow of the test gas monitoring system 5, start or stop the ventilation system 4, and collect the test gas data monitored by the test gas monitoring system 5 in real time through the terminal device 7, so as to improve the convenience and efficiency of operation. The terminal device 7 may include a computer, a terminal, a smart phone, etc.

[0087] Exemplarily, the test gas monitoring sensor 54 is connected to the data cloud box 57 via the strong and weak wires 56, and the data cloud box 57 is connected to the terminal device 7 via the Internet of Things 58. Among them, the strong and weak wires 56 are used as power supply and signal transmission, and the data cloud box 57 is used to transmit the data monitored by the test gas monitoring sensor 54 to the terminal device 7 via the Internet of Things 58 for the test personnel to check. Among them, the test gas generation system 2 and the ventilation system 4 can be connected to the data cloud box 57 via the strong and weak wires 56.

[0088] An embodiment of the present application also provides a test method for the wind-driven escape of gas inside a top pipe, using a test device for the wind-driven escape of gas inside a top pipe, the method comprising: using a ventilation system 4 to drive air flow to discharge the gas inside the test pipe 1 to the outside of the pipe; using a test gas generating system 2 to deliver the test gas into the test pipe 1; using a number of test gas monitoring systems 5 to monitor the test gas data at various positions inside the test pipe 1 in real time; and obtaining the relationship between the test gas escape and ventilation based on the monitored test gas data.

[0089] The embodiment of the present application also provides a test method for the wind-driven escape of gas inside a top pipe, which can use a test device for the wind-driven escape of gas inside a top pipe to perform simulation tests under different working conditions: 1. The ventilation mode and air volume of the ventilation system 4, and the distance between the first end of the wind duct 3 and the closed end of the test tube 1 are adjusted to simulate the influence of the ventilation system 4 with different ventilation capacities on the escape behavior of harmful gases; 2. The flow rate of the test gas delivered by the test gas generating system 2 to the test tube 1 is adjusted to simulate the escape behavior of harmful gases with different flow rates driven by wind.

[0090] Therefore, by simulating the escape of harmful gases in the top pipe under the action of driven wind flow through the method of the present application, and studying the escape law of harmful gases, it will help to improve the understanding and prediction ability of the harmful gas escape process, and provide a theoretical basis and decision-making support for emergency planning, management and post-disaster handling of harmful gas leakage accidents.

[0091] The above are only specific implementation methods of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed in the present application should be covered within the protection scope of the present application.

Claims

1. A test device for the escape of gas from a jacking pipe driven by wind, characterized in that: The invention comprises a test tube (1) with one end open and the other end closed, wherein the closed end of the test tube (1) is connected to a test gas generating system (2), a wind tube (3) extending along its axial direction is provided in the test tube (1), the end of the wind tube (3) facing the open end of the test tube (1) is connected to a ventilation system (4), and a plurality of test gas monitoring systems (5) are provided in the test tube (1) at intervals along its axial direction.

2. The wind-driven escape test device for internal gas in a jacking pipe according to claim 1 is characterized in that: The test gas generating system (2) comprises a test gas storage tank (21), a test gas flow meter (22) and a test gas pipe (23); the outlet of the test gas storage tank (21) is connected to the test gas pipe (23) via the test gas flow meter (22); and the test gas pipe (23) is connected to the closed end of the test pipe (1).

3. The wind-driven escape test device for internal gas in a jacking pipe according to claim 1 is characterized in that: The ventilation system (4) comprises a variable frequency fan (41) and a wind speed detector (42); the variable frequency fan (41) is connected to the wind tube (3); and the wind speed detector (42) is arranged on the wind tube (3).

4. The wind-driven escape test device for gas inside a jacking pipe according to claim 1, 2 or 3, characterized in that: The wind tube (3) comprises a plurality of wind tube segments (31) spliced ​​together.

5. The wind-driven escape test device for internal gas in a jacking pipe according to claim 1, characterized in that: The test gas monitoring system (5) is movable along the axial direction of the test tube (1).

6. The wind-driven escape test device for internal gas in a jacking pipe according to claim 1 or 5, characterized in that: A slide rail (6) is provided in the test tube (1) along its axial direction, and the test gas monitoring system (5) is slidably fitted on the slide rail (6).

7. The wind-driven escape test device for internal gas in a jacking pipe according to claim 6 is characterized in that: The test gas monitoring system (5) comprises a sliding foot (51) slidably matched with a slide rail (6), a vertical rod (52) connected to the sliding foot (51), a horizontal rod (53) connected to the vertical rod (52), and a test gas monitoring sensor (54) connected to the horizontal rod (53).

8. The wind-driven escape test device for gas inside a jacking pipe according to claim 7 is characterized in that: A plurality of cross bars (53) are arranged on the vertical bar (52) at intervals along the axial direction thereof, and a plurality of the test gas monitoring sensors (54) are arranged on the cross bars (53).

9. The wind-driven escape test device for gas inside a jacking pipe according to claim 7, characterized in that: It also includes a terminal device (7), and the terminal device (7) is connected to the test gas generating system (2), the ventilation system (4) and the test gas monitoring system (5) respectively.

10. A test method for the escape of gas from a jacking pipe driven by wind, characterized in that: Using the wind-driven escape test device for gas inside a jacking pipe according to any one of claims 1 to 9, the method comprises: A ventilation system (4) is used to drive air flow to discharge the gas in the test tube (1) to the outside of the tube; a test gas generating system (2) is used to deliver the test gas into the test tube (1); a plurality of test gas monitoring systems (5) are used to monitor the test gas data at various positions in the test tube (1) in real time; and the relationship between the test gas escape and ventilation is obtained based on the monitored test gas data.

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