Carbon dioxide pipeline leakage testing device

Abstract

The invention relates to the technical field of pipeline leakage testing, and discloses a carbon dioxide pipeline leakage testing device which comprises a testing soil box, a data acquisition assembly and a testing pipe, the testing soil box is provided with an air inlet through hole, and the data acquisition assembly is arranged in the testing soil box and used for acquiring temperature data and / or carbon dioxide concentration data; the testing pipe is arranged in the testing soil box in a circumferential rotating mode and provided with a closed end and an open end, the open end of the testing pipe is communicated with the air inlet through hole in an aligned mode, and the pipe wall of the testing pipe is connected with an air leakage assembly used for overpressure air leakage. The carbon dioxide pipeline leakage testing device is suitable for research on leakage of carbon dioxide pipelines buried in soil.

Description

Technical Field

[0001] The invention belongs to the technical field of pipeline leakage testing, and in particular relates to a carbon dioxide pipeline leakage testing device. Background Art

[0002] Carbon dioxide is a colorless, odorless, non-toxic gas that is non-flammable and non-explosive. Compared with the dangers of refined oil and natural gas, carbon dioxide is a non-toxic asphyxiating gas with a higher density than air. After leakage, it tends to accumulate in low-lying areas or confined spaces, which not only damages the surrounding environment and inhibits the growth of soil microorganisms, but also may cause suffocation, poisoning, frostbite, and even death risks to humans and animals. For carbon dioxide transmission pipelines buried in the soil, pipeline corrosion, pipeline material or structural failure, and illegal operation by personnel may cause pipeline rupture and cause carbon dioxide leakage. Therefore, it is particularly important to master accurate and timely carbon dioxide leak detection technology.

[0003] At present, the leakage research of carbon dioxide transmission pipelines is mostly about the leakage of carbon dioxide in the atmosphere. The test device used is to arrange the pipeline overhead, which is not suitable for studying the leakage of pipelines buried in the soil. In other words, there is currently a lack of a test device suitable for the leakage research of carbon dioxide pipelines buried in the soil. Summary of the invention

[0004] In view of the above-mentioned deficiencies or defects in the prior art, the present invention provides a carbon dioxide pipeline leakage testing device suitable for leakage research of carbon dioxide pipelines buried in soil.

[0005] To achieve the above object, the present invention provides a carbon dioxide pipeline leakage testing device, comprising:

[0006] The test soil box is provided with an air intake hole;

[0007] A data acquisition component is disposed in the test soil box and is used to collect temperature data and / or carbon dioxide concentration data;

[0008] The test tube is rotatably arranged inside the test soil box and has a closed end and an open end. The open end of the test tube is aligned and connected to the air inlet hole. A venting component for overpressure venting is connected to the tube wall of the test tube.

[0009] Optionally, the carbon dioxide pipeline leakage testing device also includes a first connecting flange and a rolling bearing, the first connecting flange is detachably fastened to the test soil box and is arranged around the air inlet hole, the outer ring of the rolling bearing is fixedly connected to the inner edge of the first connecting flange, and the open end of the test tube is fixedly connected to the inner ring of the rolling bearing.

[0010] Optionally, the carbon dioxide pipeline leakage testing device further includes:

[0011] An external ventilation pipe is connected to the outside of the test soil box and is aligned and communicated with the air inlet hole;

[0012] The valve is arranged on the external ventilation pipe and is used to control the opening or closing of the external ventilation pipe.

[0013] Optionally, the carbon dioxide pipeline leakage testing device further includes:

[0014] A first pressure sensor is disposed in the test tube;

[0015] The second pressure sensor is arranged in the external ventilation pipe.

[0016] Optionally, a plurality of air leakage components are connected to the tube wall of the test tube, and the plurality of air leakage components are arranged at intervals along the axial direction of the test tube and have different positions in the circumferential direction of the test tube.

[0017] Optionally, the deflation component comprises:

[0018] An air release joint protrudes outward from the wall of the test tube and is connected to the test tube;

[0019] A bursting disc is sealed at the gas outlet end of the gas relief joint.

[0020] Optionally, the degassing assembly further comprises a pressure cap, which is detachably sleeved on the degassing joint and is provided with a degassing hole which is aligned and communicated with the air outlet end of the degassing joint.

[0021] Optionally, the test soil box has a detachable side wall, and the carbon dioxide pipeline leakage testing device also includes a base. The test soil box is arranged on the base and can be flipped between an inclined position and a horizontal position. In the inclined position, the test soil box is tilted downward toward the detachable side wall, and in the horizontal position, the test soil box is placed horizontally.

[0022] Optionally, the test tube is arranged along the length direction of the test soil box, and the detachable side wall includes a plurality of splicing plates which are detachably spliced ​​in sequence along the height direction.

[0023] Optionally, the carbon dioxide pipeline leakage testing device further comprises a flipping driving mechanism, which is connected to the test soil box and is used to drive the test soil box to rotate between an inclined position and a horizontal position.

[0024] According to the above technical scheme, when the leakage of the carbon dioxide pipeline buried in the soil is studied and tested, soil can be filled into the test soil box so that the test tube inside the test soil box is buried in the soil to simulate the pipeline buried in the soil. Then, carbon dioxide is introduced into the test tube through the air inlet hole of the test soil box. When the pressure in the test tube reaches the test value, the degassing component is degassed to simulate the leakage of the carbon dioxide pipeline. Finally, the temperature data and / or carbon dioxide concentration data in the test soil box are collected by the data acquisition component to monitor the temperature and / or carbon dioxide concentration changes in the test soil box, so as to realize the test and study of the carbon dioxide leakage of the buried pipeline. Among them, the test tube can rotate circumferentially. In this way, the orientation of the degassing component can be changed by rotating the test tube before the test, thereby changing the degassing direction of the test tube. In this way, the carbon dioxide pipeline leakage test device can simulate various situations of pipeline leakage in different directions. In addition, due to the overpressure degassing effect of the degassing component, it can be ensured that the pressure, temperature and phase state of the gas when the test tube is degassed through the degassing component can be consistent with the actual leakage situation, thereby improving the accuracy of the test.

[0025] Other features and advantages of the present invention will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention, but do not constitute a limitation of the present invention.

[0027] In the attached picture:

[0028] Figure 1 It is a structural schematic diagram of a carbon dioxide pipeline leakage testing device in one embodiment of the present invention;

[0029] Figure 2 for Figure 1 A cross-sectional view of the CO2 pipeline leak test device;

[0030] Figure 3 for Figure 2 A partial enlarged view of the middle A;

[0031] Figure 4 for Figure 2 A partial enlarged view of point B in the middle.

[0032] Description of reference numerals:

[0033] 1 Test soil box

[0034] 11 Splicing plate 12 Connection lug

[0035] 2 test tubes

[0036] 3 Deflation components

[0037] 31 Air vent connector 32 Bursting disc

[0038] 33 Pressure cap

[0039] 4 External ventilation tube

[0040] 41 Second connecting flange

[0041] 5. Valve

[0042] 6. Flip drive mechanism

[0043] 61 Manual hydraulic pump 62 Hydraulic telescopic rod

[0044] 7 Base

[0045] 8 First connecting flange

[0046] 9 Rolling bearings DETAILED DESCRIPTION

[0047] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0048] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0049] In the present invention, unless otherwise specified, the directions or positional relationships indicated by directional words such as "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the embodiments of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0050] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0051] The invention firstly provides a carbon dioxide pipeline leakage testing device.

[0052] In one embodiment, referring to the attached Figure 1 and attached Figure 2 As shown, including:

[0053] The test soil box 1 is provided with an air intake hole;

[0054] A data acquisition component is arranged in the test soil box 1 and is used to collect temperature data and / or carbon dioxide concentration data;

[0055] The test tube 2 is rotatably arranged inside the test soil box 1 and has a closed end and an open end. The open end of the test tube 2 is aligned and connected to the air inlet hole. A venting component 3 for overpressure venting is connected to the tube wall of the test tube 2.

[0056] In this embodiment, when studying and testing the leakage of a carbon dioxide pipeline buried in the soil, soil can be filled into the test soil box 1 so that the test tube 2 inside the test soil box 1 is buried in the soil to simulate the pipeline buried in the soil. Then, carbon dioxide is introduced into the test tube 2 through the air inlet hole of the test soil box 1. When the pressure in the test tube 2 reaches the test value, the deflation component deflates, thereby simulating the leakage of the carbon dioxide pipeline. Finally, the temperature data and / or carbon dioxide concentration data in the test soil box 1 are collected through the data acquisition component to monitor the temperature and / or carbon dioxide concentration in the soil. By changing the carbon dioxide concentration, the carbon dioxide leakage of the buried pipeline can be tested and studied; wherein, the test tube can rotate circumferentially. With such an arrangement, the orientation of the adjustment leaking component 3 can be changed by rotating the test tube 2 before the test, thereby changing the leaking direction of the test tube 2. In this way, the carbon dioxide pipeline leakage test device can simulate various situations in which the pipeline leaks in different directions; in addition, due to the overpressure leaking effect of the leaking component, it can be ensured that the pressure, temperature and phase state of the gas when the test tube 2 is leaked through the leaking component 3 can be consistent with the actual leakage situation, thereby improving the accuracy of the test.

[0057] In actual application, since the buried depth of the carbon dioxide pipeline is generally 1.5m, in order to be more in line with the actual situation, the specifications of the test soil box 1 can be designed to be 3m in length, 2m in width and 2m in height, so that the air inlet hole is arranged on the side wall of the test soil box 1 in the length direction and is located 0.5m higher than the bottom wall of the test soil box 1. In this way, when the test soil box 1 is filled with soil, the overall height of the soil is 2m, and the test tube 2 connected to the air inlet hole is 0.5m higher than the bottom wall of the test soil box 1. In this way, even if the soil thickness above the test tube 2 is 1.5m, the situation of the carbon dioxide pipeline being buried at a depth of 1.5m is simulated.

[0058] Specifically, the data acquisition component may include a temperature sensor and a carbon dioxide concentration sensor. The temperature inside the test soil box 1 is collected by the temperature sensor, and the carbon dioxide concentration inside the test soil box 1 is collected by the carbon dioxide concentration sensor. In actual application, the carbon dioxide pipeline leakage test device may also include a display, which is respectively communicated with the temperature sensor and the carbon dioxide concentration sensor to display the data collected by the temperature sensor and the carbon dioxide concentration sensor.

[0059] Specifically, the test soil box 1 can be formed by welding steel plates, and the inner wall surface can be processed by stainless steel. In this way, the corrosion of the test soil box 1 by soil can be effectively prevented, and the service life of the test soil box 1 can be improved. In addition, the top of the test soil box 1 is open for filling with soil.

[0060] In one embodiment, referring to the attached Figure 2 and attached Figure 4 As shown, the carbon dioxide pipeline leakage test device also includes a first connecting flange 8 and a rolling bearing 9. The first connecting flange 8 is detachably fastened to the test soil box 1 and arranged around the air inlet hole. The outer ring of the rolling bearing 9 is fixedly connected to the inner edge of the first connecting flange 8, and the open end of the test tube 2 is fixedly connected to the inner ring of the rolling bearing 9. In this way, the test tube 2 can be rotatably arranged inside the test soil box 1.

[0061] Specifically, the outer ring of the rolling bearing 9 and the inner edge of the first connecting flange 8 can be fixedly connected by welding, and the open end of the test tube 2 and the inner ring of the rolling bearing 9 can be fixedly connected by welding. With such an arrangement, the relative rotation of the inner and outer rings of the rolling bearing 9 can be achieved, that is, the relative rotation of the first connecting flange 8 and the test tube 2 can be achieved, and the first connecting flange 8 is fastened to the test soil box 1, so that the test tube 2 can be rotated relative to the test soil box 1.

[0062] Specifically, the test soil box 1 is provided with a plurality of first small through holes, which are arranged around the air intake through hole at intervals from each other, and the first connecting flange 8 is provided with a plurality of second small through holes arranged at intervals along the circumference of the test tube 2. The plurality of first small through holes and the plurality of second small through holes are arranged one by one in alignment and are connected through fasteners such as bolts, so that the first connecting flange 8 is detachably fastened to the test soil box 1.

[0063] In one embodiment, referring to the attached Figure 1 , Attachment Figure 2 And attached Figure 4 As shown, the carbon dioxide pipeline leakage testing device also includes:

[0064] The external ventilation pipe 4 is connected to the outside of the test soil box 1 and is in communication with the air inlet hole;

[0065] The valve 5 is arranged on the external ventilation pipe 4 and is used to control the external ventilation pipe 4 to be turned on or off.

[0066] In this embodiment, the external ventilation tube 4 can be connected to a carbon dioxide generation or storage device, and the carbon dioxide for testing can be introduced into the test tube 2 through the external ventilation tube 4 .

[0067] Specifically, the edge of the air intake hole is provided with a plurality of first small through holes arranged at intervals around the air intake hole, a second connecting flange 41 is formed on the outer side of one end of the external ventilation pipe 4, and the second connecting flange 41 is provided with a plurality of third small through holes arranged at intervals along the circumference of the external ventilation pipe 4, the plurality of first small through holes and the plurality of third small through holes are arranged one by one in alignment and connected through fasteners such as bolts, so that one end of the external ventilation pipe 4 is fixedly connected to the outside of the test soil box 1 and is aligned and connected with the air intake hole.

[0068] In order to ensure that the carbon dioxide in the external ventilation pipe 4 can be completely passed into the test tube 2, the inner diameter of the external ventilation pipe 4 can be made consistent with the inner diameter of the test tube 2, which is generally 100 mm.

[0069] In one embodiment, the carbon dioxide pipeline leakage testing device further comprises:

[0070] A first pressure sensor is arranged in the test tube 2;

[0071] The second pressure sensor is arranged in the external ventilation pipe 4.

[0072] It can be understood that the first pressure sensor is used to collect pressure data inside the test tube 2, and the second pressure sensor is used to collect pressure data inside the external ventilation tube 4. The first pressure sensor and the second pressure sensor can also be communicatively connected to the display device to display the pressure conditions inside the test tube 2 and the external ventilation tube 4 in real time through the display device, so as to facilitate the test personnel to perform test operations according to the pressure conditions.

[0073] During the actual test, the valve 5 is opened, and carbon dioxide is introduced into the test tube 2 through the external ventilation pipe 4. When the pressure in the test tube 2 rises to close to the test value (the deflation component 3 is not deflated at this time), the valve 5 is closed, and the pressure in the external ventilation pipe 4 rises to the set pressure, and then the valve 5 is opened. The high-pressure carbon dioxide in the external ventilation pipe 4 is filled into the test tube 2, so that the pressure in the test tube 2 instantly rises to the test value, and the deflation component 3 is deflated instantly. In this way, the actual situation of pipeline leakage can be simulated, so that the test data and results are closer to the actual situation.

[0074] In one embodiment, a plurality of air leakage components 3 are connected to the tube wall of the test tube 2, and the plurality of air leakage components 3 are arranged at intervals along the axial direction of the test tube 2 and at different positions in the circumferential direction of the test tube 2. With such an arrangement, the carbon dioxide pipeline leakage test device can simultaneously test the leakage conditions of the simulated pipeline at different positions in the circumferential direction, improve the test efficiency, and simulate the situation where multiple leakage ports leak at the same time.

[0075] In one embodiment, referring to the attached Figure 2 and attached Figure 3 As shown, the deflation component 3 includes:

[0076] The air release joint 31 is formed by protruding outward from the wall of the test tube 2 and connected to the test tube 2;

[0077] The bursting disc 32 is sealed at the gas outlet end of the gas release joint 31 .

[0078] It can be understood that the bursting disc 32 can be used to simulate the overpressure leakage of the pipeline. In actual application, the bursting disc 32 is set to explode when the pressure in the test tube 2 exceeds the test value, so that the air release joint 31 connects the inside and outside of the test tube 2, thereby forming an air release condition.

[0079] Specifically, the bursting disc 32 is welded to the air release joint 31 .

[0080] Of course, in some other embodiments, the air release component 3 may also be in other structural forms. For example, the air release component 3 may also be a safety pressure relief valve.

[0081] In one embodiment, referring to the attached Figure 2 and attached Figure 3 As shown, the degassing assembly 3 further includes a pressure cap 33 , which is detachably sleeved on the degassing joint 31 and is provided with a degassing hole aligned and connected to the gas outlet end of the degassing joint 31 .

[0082] In actual application, a plurality of pressure caps 33 of different specifications can be designed, and the sizes and shapes of the air leakage holes of the pressure caps 33 of different specifications are different. For example, the air leakage hole can be a round hole with a diameter of 3 mm, a round hole with a diameter of 5 mm, a rectangular hole of 1 mm×4 mm, and a rectangular hole of 1 mm×7 mm. In this way, by replacing pressure caps 33 of different specifications, leakage experiments with different leakage hole specifications can be tested.

[0083] Specifically, the pressure cap 33 can be detachably sleeved on the air release joint 31 by means of a threaded connection.

[0084] In one embodiment, referring to the attached Figure 2 As shown, the test soil box 1 has a detachable side wall, and the carbon dioxide pipeline leakage test device also includes a base. The test soil box 1 is arranged on the base and can be flipped between an inclined position and a horizontal position. In the inclined position, the test soil box 1 tilts downward toward the detachable side wall, and in the horizontal position, the test soil box 1 is placed horizontally.

[0085] In this embodiment, the test soil box 1 has a detachable side wall, so as to facilitate the removal of soil in the test soil box 1. When the soil in the test soil box 1 needs to be removed, the detachable side wall of the test soil box 1 can be removed to form an opening, and the test soil box 1 can be turned over to an inclined position, so that the soil in the test soil box 1 can flow out of the opening spontaneously, which greatly improves the convenience and efficiency of soil removal.

[0086] In one embodiment, referring to the attached Figure 2 As shown, the test tube 2 is arranged along the length direction of the test soil box 1, and the detachable side wall includes a plurality of splicing plates 11 which are detachably spliced ​​in sequence along the height direction.

[0087] In this embodiment, the part of the splicing plate 11 located at the bottom can be installed first, and then the soil is filled into the test soil box 1. After the soil height in the test soil box 1 reaches the preset height, the test tube 2 can be supported and placed on the filled soil, and then the test tube 2 is docked with the air inlet hole. After the test tube 2 is installed, the remaining splicing plates 11 are installed to complete the side wall of the test soil box 1, and finally the soil is filled into the test soil box 1 to cover the test tube 2. In other words, by setting the detachable side wall as a plurality of splicing plates 11 that are detachably spliced ​​in sequence along the height direction, it is convenient to fill the test soil box 1 with soil, and it is also convenient to install the test tube 2, which effectively improves the convenience and efficiency of the installation of the carbon dioxide pipeline leakage test device.

[0088] Furthermore, the test soil box 1 includes a box body, one side of which is provided with an opening extending from bottom to top, the top of the opening is open and the edge of the opening is formed into a slot structure, a plurality of splicing plates 11 are plugged into the slot structure so as to be sequentially connected at the opening from bottom to top, and two adjacent splicing plates 11 are connected by mutual plugging, thereby forming a detachable side wall. Specifically, convex strips are formed on both sides of the splicing plate 11, and the convex strips are respectively inserted into the slots on the two side edges of the opening, so as to be sequentially connected at the opening, and a groove is formed on the top edge of the splicing plate 11, and a protrusion is formed on the bottom edge, and the adjacent two splicing plates 11 are plugged into each other by inserting the protrusion into the groove.

[0089] In one embodiment, referring to the attached Figure 1 and attached Figure 2 As shown, the carbon dioxide pipeline leakage test device also includes a flip driving mechanism 6, which is connected to the test soil box 1 and is used to drive the test soil box 1 to rotate between an inclined position and a horizontal position. Such an arrangement can further improve the convenience of removing the soil in the test soil box 1.

[0090] Specifically, the carbon dioxide pipeline leakage test device may also include a base 7, a test soil box 1 is arranged on the base 7, a fixed seat is provided on the base 7, a connecting lug 12 is provided at the bottom of the test soil box 1, and the connecting lug 12 is rotatably connected to the fixed seat through a rotating shaft, so that the test soil box 1 can be flipped relative to the base 7, and a flipping drive mechanism 6 is arranged on the base 7 and includes a manual hydraulic pump 61 and a hydraulic telescopic rod 62, one end of the hydraulic telescopic rod 62 is hinged to the test soil box 1, and the other end is hinged to the pump body of the manual hydraulic pump 61, and the hydraulic telescopic rod 62 is also hydraulically connected to the manual hydraulic pump 61. By operating the manual hydraulic pump 61 to extend and retract the hydraulic telescopic rod 62, the test soil box 1 can be driven to rotate between an inclined position and a horizontal position.

[0091] In order to facilitate the transportation of the test soil box 1, the bottom of the base 7 can also be provided with rolling self-locking casters.

[0092] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0093] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0094] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0095] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A carbon dioxide pipeline leakage testing device, characterized in that: include: The test soil box (1) is provided with an air intake hole; A data acquisition component, arranged in the test soil box (1) and used for collecting temperature data and / or carbon dioxide concentration data; A test tube (2) is rotatably arranged inside the test soil box (1) and has a closed end and an open end. The open end of the test tube (2) is aligned and communicated with the air inlet through hole. A gas relief component (3) for overpressure gas relief is connected to the tube wall of the test tube (2).

2. The carbon dioxide pipeline leakage testing device according to claim 1, characterized in that: The carbon dioxide pipeline leakage test device also includes a first connecting flange (8) and a rolling bearing (9), wherein the first connecting flange (8) is detachably fastened to the test soil box (1) and arranged around the air inlet hole, the outer ring of the rolling bearing (9) is fixedly connected to the inner edge of the first connecting flange (8), and the open end of the test tube (2) is fixedly connected to the inner ring of the rolling bearing (9).

3. The carbon dioxide pipeline leakage testing device according to claim 1, characterized in that: The carbon dioxide pipeline leakage testing device also includes: An external ventilation pipe (4) is connected to the outside of the test soil box (1) and is aligned and communicated with the air inlet hole; The valve (5) is arranged on the external ventilation pipe (4) and is used to control the opening or closing of the external ventilation pipe (4).

4. The carbon dioxide pipeline leakage testing device according to claim 3, characterized in that: The carbon dioxide pipeline leakage testing device also includes: A first pressure sensor is arranged in the test tube (2); The second pressure sensor is arranged in the external ventilation pipe (4).

5. The carbon dioxide pipeline leakage testing device according to claim 1, characterized in that: A plurality of air leakage components (3) are connected to the tube wall of the test tube (2); the plurality of air leakage components (3) are arranged at intervals along the axial direction of the test tube (2) and have different positions in the circumferential direction of the test tube (2).

6. The carbon dioxide pipeline leakage testing device according to claim 1, characterized in that: The deflation component (3) comprises: A gas relief joint (31) is formed by protruding outward from the wall of the test tube (2) and is connected to the test tube (2); A bursting disc (32) is sealed at the gas outlet end of the gas relief joint (31).

7. The carbon dioxide pipeline leakage testing device according to claim 6, characterized in that: The degassing assembly (3) further comprises a pressure cap (33), which is detachably sleeved on the degassing joint (31) and is provided with a degassing hole which is aligned and communicated with the gas outlet end of the degassing joint (31).

8. The carbon dioxide pipeline leakage testing device according to claim 1, characterized in that: The test soil box (1) has a detachable side wall, and the carbon dioxide pipeline leakage test device also includes a base. The test soil box (1) is arranged on the base and can be flipped between an inclined position and a horizontal position. In the inclined position, the test soil box (1) is tilted downward toward the detachable side wall, and in the horizontal position, the test soil box (1) is placed horizontally.

9. The carbon dioxide pipeline leakage testing device according to claim 8, characterized in that: The test tube (2) is arranged along the length direction of the test soil box (1), and the detachable side wall comprises a plurality of splicing plates (11) which are detachably spliced ​​in sequence along the height direction.

10. The carbon dioxide pipeline leakage testing device according to claim 8, characterized in that: The carbon dioxide pipeline leakage test device further comprises a flipping drive mechanism (6), which is connected to the test soil box (1) and is used to drive the test soil box (1) to rotate between an inclined position and a horizontal position.

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