A leakage positioning device for a liquid carbon dioxide transportation pipeline

Abstract

The present invention discloses a leakage positioning device for a liquid carbon dioxide conveying pipeline, which relates to the technical field of leakage warning of conveying pipelines. The leakage positioning device includes a sealing mechanism. The sealing mechanism includes an outer sealing cover, an inner sealing cover, a main airbag and a leakage positioning component. The inner sealing cover is arranged outside the flange at the joint of adjacent conveying pipelines. The main airbag is communicated with the inner sealing cavity of the inner sealing cover. The outer sealing cover is arranged outside the inner sealing cover, and the main airbag is located between the outer sealing cover and the inner sealing cover. The leakage positioning component is arranged on the outer side of the outer sealing cover. The leakage positioning component includes a leakage monitoring component and a positioning display component. When the main airbag is in the first expansion position, the main airbag is used to control the control end of the leakage monitoring component to be in a signal transmission state; when the main airbag is in the second expansion position, the main airbag is used to control the control end of the positioning display component to be in an electrically connected state; the leakage positioning device realizes early warning and positioning of pipeline leakage.

Description

Technical Field

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

[0002] In the process of oil field development, liquid carbon dioxide needs to be applied to improve oil recovery efficiency. The specific application method is carbon dioxide oil recovery (CO2-EOR) technology, which is to inject CO2 into secondary oil recovery wells and low permeability wells in the oil field. The capillary force of the oil retained in the formation pores can be reduced and eliminated, and the crude oil can be driven to the production wells, thereby achieving the purpose of oil recovery and increased production.

[0003] In order to improve the transportation efficiency of carbon dioxide, it is generally necessary to compress carbon dioxide into liquid and transport it over long distances. The existing long-distance transportation methods include pipeline transportation or railway transportation, which transports carbon dioxide from the production site to the oil field. Among them, the long-distance laying of pipelines is generally carried out by splicing and assembling pipelines through flange structures to connect adjacent pipelines. As time goes by, the sealing of the flange connection of the pipeline deteriorates, and carbon dioxide is easily leaked from the gap. Once this problem occurs, it not only affects production efficiency, but also may cause serious environmental pollution and safety accidents if it is not discovered and measures are not taken in time. Summary of the invention

[0004] The purpose of the present invention is to provide a liquid carbon dioxide delivery pipeline leakage locating device with a simple structure and reasonable design in order to solve the above problems.

[0005] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0006] A device for locating leakage of a liquid carbon dioxide delivery pipeline, comprising:

[0007] A sealing mechanism, comprising an outer sealing cover, an inner sealing cover, a main airbag and a leakage positioning assembly, wherein the inner sealing cover is arranged outside the flange at the connection of the adjacent delivery pipeline, the main airbag is communicated with the inner sealing cavity of the inner sealing cover, the outer sealing cover is arranged outside the inner sealing cover and is fixedly connected to the inner sealing cover, and the main airbag is located between the outer sealing cover and the inner sealing cover, the leakage positioning assembly is arranged outside the outer sealing cover, the leakage positioning assembly comprises a leakage monitoring assembly and a positioning display assembly, the main airbag is respectively connected to the leakage monitoring assembly and the positioning display assembly in a transmission manner, the leakage monitoring assembly is used to monitor the leakage of liquid carbon dioxide at the flange, and the positioning display assembly is used to display the target position of the leakage flange;

[0008] The leakage monitoring component includes a vibration processor, an elastic plate, a second suction block, and a first suction block. The main airbag is arranged on the auxiliary seal cover, and the auxiliary seal cover is fixedly arranged on the inner seal cover and communicated with the inner seal cover. The first suction block is fixedly arranged on the inner side of the main airbag. The second suction block is fixedly arranged on the elastic plate. One end of the elastic plate penetrates through the auxiliary seal cover and is fixedly arranged on the auxiliary seal cover. The end of the elastic plate located outside the auxiliary seal cover is electrically connected to the vibration processor through a vibration transmission line;

[0009] The positioning and display component includes an early warning display, a first electrical connection block, and a second electrical connection block. The first electrical connection block and the second electrical connection block are respectively electrically connected to the early warning display. The vibration processor and the early warning display are respectively arranged on a controller located on the ground;

[0010] When the main airbag is in the first expansion position, the second suction block and the first suction block are separated, and the elastic plate drives the second suction block to vibrate reciprocally; when the main airbag is in the second expansion position, the second electrical connection block and the first electrical connection block are in contact, and the circuit of the early warning display is in a loop state.

[0011] As a further optimized solution of the present invention, the outer seal cover is fixedly connected with an isolation cylinder, and the vibration transmission line is arranged through the cavity of the isolation cylinder.

[0012] As a further optimized solution of the present invention, the positioning and display component further includes a wire bundling post and a sliding sleeve. The wire bundling post is fixedly arranged inside the isolation cylinder. One end of the wire bundling post close to the main airbag is slidably connected with the sliding sleeve. The outside of the sliding sleeve is slidably and fittingly connected with the isolation cylinder. The first electrical connection block is fixedly connected inside the sliding sleeve. The second electrical connection block corresponding to the first electrical connection block is fixedly arranged on the wire bundling post.

[0013] As a further optimized solution of the present invention, the inner seal cover includes a first inner seal cover and a second inner seal cover. The first inner seal cover and the second inner seal cover are hermetically buckled and connected, and the flange of the conveying pipeline is surrounded in the sealed inner cavity formed by the first inner seal cover and the second inner seal cover.

[0014] As a further optimized solution of the present invention, the auxiliary seal cover is fixedly arranged on the first inner seal cover, and a deflation component is arranged on the first inner seal cover. The deflation component is used to expand the volume of the sealed inner cavity of the first inner seal cover.

[0015] As a further optimized solution of the present invention, the air leakage component includes a separation strip and a detachment component. The first inner sealing cover has a plurality of convex parts, and an inner airbag is connected between adjacent convex parts. The separation strip is arranged outside the inner airbag, and the detachment component is arranged outside the separation strip. When the main airbag is in the second expansion position, the detachment component controls the separation strip to detach from between adjacent convex parts to the outside of the first inner sealing cover.

[0016] As a further optimized solution of the present invention, the detachment component includes a hole-punching component, a first punching needle and an outer airbag. The outer airbag is connected to the separation strip and wraps around the outside of the inner airbag. When the main airbag is in the second expansion position, the main airbag drives the first punching needle to pierce the separation strip through the hole-punching component.

[0017] As a further optimized solution of the present invention, the hole-punching component includes a torsion plate, an abutting block, a guide rod and a spring. A torsion plate is rotatably connected to one side of the auxiliary sealing cover close to the main airbag, and a torsion spring is sleeved on the rotating shaft of the torsion plate. The outside of the auxiliary sealing cover is slidably connected with a guide rod through a sliding seat. One end of the guide rod close to the torsion plate is fixedly connected with an abutting block, and a spring is fixedly connected to the position of the guide rod close to the sliding seat. One end of the guide rod close to the separation strip is fixedly connected with a first punching needle.

[0018] As a further optimized solution of the present invention, there are a plurality of separation strips. The opposite sides of adjacent separation strips are fixedly connected with third suction blocks, and a second punching needle is arranged on the side of the separation strip away from the auxiliary sealing cover. When the separation strip punctured by the first punching needle leaks air and detaches from the first inner sealing cover, the third suction blocks on the separation strip adjacent to the leaking separation strip adsorb and abut against the third suction blocks on the leaking separation strip, and the second punching needle punctures the separation strip adjacent to the leaking separation strip.

[0019] As a further optimized solution of the present invention, along the radial direction of the first inner sealing cover, the distance between adjacent convex parts gradually decreases.

[0020] The present invention has at least the following beneficial effects: A leakage positioning device for a liquid carbon dioxide pipeline provided by the present invention isolates the inner sealing cover by means of an outer sealing cover in the sealing mechanism, so that the inner sealing cover is hermetically arranged outside the flange. When a leakage occurs, the main airbag expands. When the main airbag is in the first expansion position, the second suction block and the first suction block are separated from each other, and the elastic plate drives the second suction block to vibrate reciprocally. The generated vibration information is transmitted to the vibration processor, so as to timely obtain the initial situation of the leakage of liquid carbon dioxide and give a primary warning of the leakage situation of liquid carbon dioxide.

[0021] Moreover, as the liquid continues to leak, the main airbag continues to expand. When the main airbag is in the second expansion position, the second electrical connection block abuts against the first electrical connection block, and the circuit of the warning display is in a loop state. Exemplarily, the warning display is a display light, and displays a color with a warning meaning, which reminds the maintenance personnel to confirm the leakage position, thereby achieving the role of early warning positioning;

[0022] In addition, when the main airbag is inflated, the torsion plate squeezes the protrusion, causing the guide rod to drive the first puncture needle to puncture the isolation strip, causing it to deflate, thereby releasing the extrusion constraint on the inner airbag, thereby achieving the contraction of the inner airbag and expanding it outward to increase the spatial volume of the sealed inner cavity, and multiple isolation strips are provided, and the multiple isolation strips are deflated in sequence to achieve a gradual increase in the internal space of the sealed inner cavity, that is, to further accommodate the gasified carbon dioxide, so as to extend the time required for maintenance personnel to arrive and improve the safety of the early warning and positioning device. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the connection structure between the liquid carbon dioxide delivery pipeline and the flange of the present invention;

[0025] Figure 3 The present invention Figure 1 A schematic diagram of the front structure of

[0026] Figure 4 The present invention Figure 3 A schematic diagram of a partial cross-sectional structure of a side surface;

[0027] Figure 5 The present invention Figure 3 A schematic diagram of the front partial cross-sectional structure of the leakage positioning mechanism;

[0028] Figure 6 The present invention Figure 5 Enlarged view of point A in the middle;

[0029] Figure 7 The present invention Figure 5 A schematic diagram of the structure of the middle main airbag in the second expansion position;

[0030] Figure 8 It is a partial cross-sectional structural schematic diagram of the deflation component and the sealing component of the present invention;

[0031] Figure 9 The present invention Figure 8 Enlarged view of point B in the middle;

[0032] Figure 10 It is a side structural schematic diagram of the isolation strip of the present invention;

[0033] Figure 11 is of the present invention Figure 9 Partial sectional view structural diagram of the isolation strip in a deflated state in the present invention;

[0034] Figure 12 is of the present invention Figure 11 Enlarged view at position C in the present invention;

[0035] Figure 13 Side sectional view structural diagram of the first sealing cover of the present invention.

[0036] In the figure: 1, conveying pipeline; 2, flange; 3, outer sealing cover; 31, first inner sealing cover; 301, convex part; 302, inner airbag; 32, second inner sealing cover; 33, main airbag; 34, first suction block; 35, second suction block; 36, elastic plate; 37, vibration transmission line; 38, first electrical connection block; 39, second electrical connection block; 310, sliding sleeve; 311, auxiliary sealing cover; 312, torsion plate; 313, abutting block; 314, guide rod; 315, spring; 316, first puncture needle; 317, isolation strip; 318, third suction block; 319, second puncture needle; 320, outer airbag; 41, isolation cylinder; 42, wire bundling column; 5, controller; 51, vibration processor; 52, warning display. Specific embodiments

[0037] The following further describes the present application in detail with reference to the accompanying drawings. It is necessary to point out here that the following specific embodiments are only used to further illustrate the present application and cannot be understood as limiting the protection scope of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application according to the above application content.

[0038] In one embodiment, as shown in Figure 1 , Figure 2 and Figure 3 , the present invention provides a liquid carbon dioxide conveying pipeline leakage positioning device, including:

[0039] Sealing mechanism, continue to refer to Figure 4 and Figure 5The sealing mechanism includes an outer sealing cover 3, an inner sealing cover, a main airbag 33 and a leakage positioning component. The inner sealing cover is arranged on the outside of the flange 2 at the connection of the adjacent conveying pipeline 1, and the inner sealing cover is sealed and fitted with the pipe wall of the conveying pipeline 1. The main airbag 33 is communicated with the inner sealing cavity of the inner sealing cover. The outer sealing cover 3 is arranged on the outside of the inner sealing cover and is fixedly connected to the inner sealing cover, and the main airbag 33 is located between the outer sealing cover 3 and the inner sealing cover. The leakage positioning component is arranged on the outside of the outer sealing cover 3. The leakage positioning component includes a leakage monitoring component and a positioning display component. The main airbag 33 is respectively connected to the leakage monitoring component and the positioning display component in a transmission manner. When the main airbag 33 is located in the first expansion position, the control end of the main airbag 33 used to control the leakage monitoring component is in a signal transmission state, and the leakage monitoring component is used to monitor the leakage of liquid carbon dioxide at the flange 2; when the main airbag 33 is located in the second expansion position, the control end of the main airbag 33 used to control the positioning display component is in an electrical connection state, and the positioning display component is used to display the target position of the leakage flange 2.

[0040] In the above embodiment, the flange 2 is sealed by the inner sealing cover, so that even if a leakage occurs, the gas generated by the gasification of the leaked carbon dioxide can be accumulated, thereby causing the main airbag 33 to expand, and the leakage can be further monitored with the help of the leakage monitoring component, so that the staff can obtain the leakage information in time, and when the leakage develops further, the leakage position can be further early-warned and located with the help of the positioning display component, so as to timely discover and determine the leakage position and carry out emergency repairs in time.

[0041] For example, see Figure 3 , Figure 4 , Figure 5 and Figure 6 , the leakage monitoring component includes a vibration processor 51, an elastic plate 36, a second suction block 35 and a first suction block 34, the main airbag 33 is arranged on the secondary sealing cover 311, the secondary sealing cover 311 is fixedly arranged on the inner sealing cover, and the secondary sealing cover 311 is communicated with the inner sealing cover, the first suction block 34 is fixedly arranged on the inner side of the main airbag 33, the second suction block 35 is fixedly arranged on the elastic plate 36, one end of the elastic plate 36 passes through the secondary sealing cover 311 and is fixedly arranged on the secondary sealing cover 311, the end of the elastic plate 36 located outside the secondary sealing cover 311 is electrically connected to the vibration processor 51 through the vibration transmission line 37, and the vibration processor 51 is arranged on the controller 5 located on the ground, wherein the outer sealing cover 3 is fixedly connected to the isolation cylinder 41, and the vibration transmission line 37 is arranged in the cylinder cavity of the isolation cylinder 41;

[0042] like Figure 6As shown, when the main airbag 33 is in the initial position and the main airbag 33 is in a deflated state, the second suction block 35 and the first suction block 34 are adsorbed and abutted. When the liquid carbon dioxide leaks and vaporizes to generate gas, causing the main airbag 33 to expand, when the main airbag 33 is in the first expansion position, under the limiting restraint of the elastic plate 36, the second suction block 35 and the first suction block 34 are separated and distributed, and the elastic plate 36 drives the second suction block 35 to vibrate reciprocally. The generated vibration information is transmitted to the vibration processor 51 through the vibration transmission line 37, so as to timely obtain the initial situation of the liquid carbon dioxide leakage, conduct a primary early warning on the liquid carbon dioxide leakage situation, and store the data of the vibration processor 51 through the controller 5.

[0043] It should be noted that the second suction block 35 and the first suction block 34 are respectively magnetic suction blocks with opposite magnetic poles, so that they can be magnetically adsorbed and abutted.

[0044] It should be further noted that, as Figure 1 and Figure 3 shown, the conveying pipeline 1 is buried underground. At this time, the isolation cylinder 41 is vertically arranged and extends to the ground, so that the controller 5 is exposed above the ground, which helps to timely and accurately obtain information about the leakage of the underground conveying pipeline 1, and avoid signal attenuation and delay caused by the obstruction of the soil layer, affecting the monitoring efficiency.

[0045] Exemplarily, continue to refer to Figure 3 、 Figure 4 、 Figure 5 and Figure 6 As shown, the positioning and display component includes an early warning display 52, a wire bundling column 42, a sliding sleeve 310, a second electrical connection block 39 and a first electrical connection block 38. The early warning display 52 is arranged on the controller 5. The wire bundling column 42 is fixedly arranged in the isolation cylinder 41. A sliding sleeve 310 is slidably connected to one end of the wire bundling column 42 close to the main airbag 33. The outside of the sliding sleeve 310 is slidably and fittingly connected to the isolation cylinder 41. A first electrical connection block 38 is fixedly connected inside the sliding sleeve 310. A second electrical connection block 39 corresponding to the first electrical connection block 38 is fixedly arranged on the wire bundling column 42. Among them, the first electrical connection block 38 and the second electrical connection block 39 are respectively electrically connected to the early warning display 52;

[0046] As Figure 6 shown, when the main airbag 33 is in the initial position, under the action of the return spring arranged between the sliding sleeve 310 and the wire bundling column 42, the sliding sleeve 310 is in the initial position. At this time, the second electrical connection block 39 and the first electrical connection block 38 are arranged at intervals. When the main airbag 33 is in the second expansion position, as Figure 7As shown, the second electrical connection block 39 is abutted against the first electrical connection block 38, and the circuit of the warning display 52 is in a loop state. Exemplarily, the warning display 52 is a display light, and displays a color with a warning meaning, which reminds the maintenance personnel to confirm the leakage location.

[0047] It should be noted that for long-distance transmission pipelines of liquid carbon dioxide, it is necessary to bury them at a certain depth underground. Therefore, when the traditional transmission pipeline is buried underground, once a leak occurs, the leaked carbon dioxide diffuses into the soil layer and is not easy to find, causing the leakage to be further aggravated. Moreover, since the transmission pipeline 1 is buried at a certain depth underground, it is impossible to locate the leakage position of the flange 2, and the maintenance is difficult. Therefore, in this application, the flange 2 is sealed at the position by the outer sealing cover 3, so that the external soil water vapor cannot enter, that is, water vapor is prevented from entering the transmission pipeline 1, thereby avoiding the absorption of heat by the gasification of liquid carbon dioxide, causing the water vapor to condense into ice, and even causing the pipeline to be blocked, and the isolation tube 41 is connected to the controller 5 on the ground, so that the vibration processor 51 and the early warning display 52 can remind the ground duty personnel to locate conspicuously and intuitively, and the information is transmitted in time without being blocked by the soil layer.

[0048] For example, see Figure 8 The inner sealing cover comprises a first inner sealing cover 31 and a second inner sealing cover 32, wherein the outer sealing cover 3 is arranged in pairs, and the first inner sealing cover 31 and the second inner sealing cover 32 are respectively fixedly connected to their corresponding outer sealing covers 3, such as Figure 3 As shown, the first inner sealing cover 31 and the second inner sealing cover 32 are sealed and connected together by the sealing and buckling connection of the outer sealing covers 3 arranged in pairs, and the flange 2 of the conveying pipeline 1 is surrounded by the sealed inner cavity composed of the first inner sealing cover 31 and the second inner sealing cover 32. After the adjacent conveying pipelines 1 are connected by the flange 2, the first inner sealing cover 31 and the second inner sealing cover 32 are sealed and buckled up and down, and are installed and fixed with the help of fastening bolts.

[0049] For example, see Figure 8 The secondary sealing cover 311 is fixedly arranged on the first inner sealing cover 31, and the first inner sealing cover 31 is provided with a gas release component, which is used to expand the volume of the sealed inner cavity space of the first inner sealing cover 31. Therefore, when the sealed inner cavity composed of the first inner sealing cover 31 and the second inner sealing cover 32 is filled with gasified carbon dioxide, the gas release component can be used to expand the volume of the sealed inner cavity, thereby further accommodating the gasified carbon dioxide, thereby extending the time required for maintenance personnel to arrive and improving the safety of the early warning positioning device.

[0050] For example, see Figure 9 , Figure 10 and Figure 11, the air leakage component includes a separation strip 317 and a detachment component. Continuing to refer to Figure 13 , the first inner sealing cover 31 has a plurality of convex portions 301, an inner airbag 302 is connected between adjacent convex portions 301, a separation strip 317 is disposed outside the inner airbag 302, and the extending direction of the separation strip 317 is parallel to the axial line direction of the conveying pipeline 1. The detachment component is disposed outside the separation strip 317. When the main airbag 33 is in the second expansion position, the detachment component controls the separation strip 317 to disengage from between adjacent convex portions 301 to the outside of the first inner sealing cover 31, thereby releasing the extrusion constraint of the separation strip 317 on the inner airbag 302, so that the inner airbag 302 first contracts and expands in the outer direction away from the conveying pipeline 1, thereby increasing the space volume of the sealed inner cavity.

[0051] Exemplarily, continuing to refer to Figure 9 , Figure 11 and Figure 12 , the detachment component includes a hole-punching component, a first puncturing needle 316 and an outer airbag 320. The outer airbag 320 is connected to the separation strip 317, the outer airbag 320 communicates with the inner cavity of the separation strip 317, and the outer airbag 320 is covered outside the inner airbag 302. When the main airbag 33 is in the second expansion position, the main airbag 33 drives the first puncturing needle 316 to pierce the separation strip 317 through the hole-punching component, thereby deflating the outer airbag 320.

[0052] Exemplarily, as Figure 9 and Figure 11 shown, the hole-punching component includes a torsion plate 312, an abutting block 313, a guide rod 314 and a spring 315. A torsion plate 312 is rotatably connected to one side of the auxiliary sealing cover 311 close to the main airbag 33. The torsion plate 312 is disposed close to the separation strip 317, and a torsion spring is sleeved on the rotation axis of the torsion plate 312. The outside of the auxiliary sealing cover 311 is slidably connected with a guide rod 314 through a sliding seat. One end of the guide rod 314 close to the torsion plate 312 is fixedly connected with an abutting block 313, and a spring 315 is fixedly connected to the position of the guide rod 314 close to the sliding seat. One end of the guide rod 314 close to the separation strip 317 is fixedly connected with a first puncturing needle 316.

[0053] In the above embodiment, when the liquid carbon dioxide leaks and vaporizes, the main airbag 33 expands. In particular, the side portion of the main airbag 33 presses the torsion plate 312, so that the torsion plate 312 further presses the abutting block 313, causing the guide rod 314 to drive the first puncturing needle 316 to move toward the separation strip 317 and pierce the separation strip 317. The outer airbag 320 contracts and deflates, thereby releasing the extrusion constraint of the separation strip 317 on the inner airbag 302 through the outer airbag 320.

[0054] Exemplarily, as Figure 8 , Figure 9 and Figure 10As shown, there are multiple isolation strips 317, and the third suction blocks 318 are fixedly connected to the opposite sides of adjacent isolation strips 317, and a second puncture needle 319 is provided on the side of the isolation strip 317 away from the secondary sealing cover 311. When the isolation strip 317 punctured by the first puncture needle 316 deflates and detaches from the first inner sealing cover 31, the third suction block 318 on the isolation strip 317 adjacent to the deflated isolation strip 317 and the third suction block 318 on the deflated isolation strip 317 are adsorbed and abutted, and the second puncture needle 319 punctures the isolation strip 317 adjacent to the deflated isolation strip 317, and so on, thereby achieving the sequential deflation of multiple isolation strips 317 and the gradual increase of the internal space of the sealed inner cavity.

[0055] It should be noted that the third suction blocks 318 are magnetic suction blocks, and the magnetism of the third suction blocks 318 on the opposite sides of the adjacent isolation strips 317 is opposite, so that magnetic suction and contact can be performed.

[0056] It should be noted that, please continue to refer to Figure 11 Along the radial direction of the first inner sealing cover 31, the distance between adjacent protrusions 301 gradually decreases, so that when the outer airbag 320 on the isolation strip 317 is placed between the adjacent protrusions 301, the outer airbag 320 can be expanded to squeeze the inner airbag 302 and then get stuck between the protrusions 301, thereby ensuring that the isolation strip 317 is stably installed on the first inner sealing cover 31, wherein the isolation strip 317 is provided with an inflation hole, and the outer airbag 320 is inflated through the inflation hole.

[0057] It should be noted that the leakage locating device for the liquid carbon dioxide delivery pipeline is installed on the outside of the flange 2 at the connection of the adjacent communicating delivery pipelines 1 when in use, and is sealed on the outside of the flange 2 by the outer sealing cover 3 arranged in pairs, so that the flange 2 is sealed in the inner sealing cover. When leakage occurs, when the main airbag 33 expands to the first expansion position, the second suction block 35 and the first suction block 34 are separated from each other under the limit of the elastic plate 36, and the elastic plate 36 drives the second suction block 35 to vibrate back and forth, and the generated vibration information is transmitted to the vibration processor 51 through the vibration transmission line 37, so as to obtain the initial leakage of the liquid carbon dioxide in time and give a primary warning of the leakage of the liquid carbon dioxide.

[0058] As the liquid continues to leak, the main airbag 33 continues to expand. When the main airbag 33 is located at the second expansion position, Figure 7 As shown, the second electrical connection block 39 is in contact with the first electrical connection block 38, and the circuit of the warning display 52 is in a loop state. For example, the warning display 52 is a display light, and displays a color with a warning meaning, which reminds the maintenance personnel to confirm the leakage position, thereby achieving the role of early warning positioning;

[0059] Moreover, during the inflation process of the main airbag 33, by means of the side part of the main airbag 33 squeezing the torsion plate 312, the torsion plate 312 further squeezes the abutting block 313, so that the guide rod 314 drives the first puncturing needle 316 to move towards the isolation strip 317 and puncture the isolation strip 317, causing it to deflate, thereby releasing the squeezing restraint of the isolation strip 317 on the inner airbag 302. And a plurality of isolation strips 317 are provided. When the isolation strip 317 punctured by the first puncturing needle 316 deflates and detaches from the first inner seal cover 31, the third suction block 318 on the isolation strip 317 adjacent to the deflated isolation strip 317 adsorbs and abuts against the third suction block 318 on the deflated isolation strip 317, and the second puncturing needle 319 punctures the isolation strip 317 adjacent to the deflated isolation strip 317, and so on, so as to realize the sequential deflation of the plurality of isolation strips 317, and realize the gradual increase of the internal space of the sealed inner cavity, that is, further accommodate the vaporized carbon dioxide, so as to extend the time required for the maintenance personnel to arrive and improve the safety of the early warning positioning device.

[0060] The above embodiments only represent several implementation manners of the present invention, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A leakage positioning device for a liquid carbon dioxide transportation pipeline, characterized in that include: A sealing mechanism, comprising an outer sealing cover, an inner sealing cover, a main airbag and a leakage positioning assembly, wherein the inner sealing cover is arranged outside the flange at the connection of the adjacent delivery pipeline, the main airbag is communicated with the inner sealing cavity of the inner sealing cover, the outer sealing cover is arranged outside the inner sealing cover and is fixedly connected to the inner sealing cover, and the main airbag is located between the outer sealing cover and the inner sealing cover, the leakage positioning assembly is arranged outside the outer sealing cover, the leakage positioning assembly comprises a leakage monitoring assembly and a positioning display assembly, the main airbag is respectively connected to the leakage monitoring assembly and the positioning display assembly in a transmission manner, the leakage monitoring assembly is used to monitor the leakage of liquid carbon dioxide at the flange, and the positioning display assembly is used to display the target position of the leakage flange; The leakage monitoring assembly includes a vibration processor, an elastic plate, a second suction block and a first suction block, the main airbag is arranged on the secondary sealing cover, the secondary sealing cover is fixedly arranged on the inner sealing cover and communicated with the inner sealing cover, the first suction block is fixedly arranged on the inner side of the main airbag, the second suction block is fixedly arranged on the elastic plate, one end of the elastic plate passes through the secondary sealing cover and is fixedly arranged on the secondary sealing cover, and one end of the elastic plate located outside the secondary sealing cover is electrically connected to the vibration processor through a vibration transmission line; The positioning display assembly includes an early warning display, a first electrical connection block and a second electrical connection block, the first electrical connection block and the second electrical connection block are electrically connected to the early warning display respectively, and the vibration processor and the early warning display are respectively arranged on a controller located on the ground; When the main airbag is located at the first expansion position, the second suction block and the first suction block are separated from each other, and the elastic plate drives the second suction block to vibrate back and forth; when the main airbag is located at the second expansion position, the second electrical connection block and the first electrical connection block are abutted, and the circuit of the warning display is in a loop state.

2. The leakage positioning device for a liquid carbon dioxide transportation pipeline according to claim 1, wherein, The outer sealing cover is fixedly connected with an isolation cylinder, and the vibration transmission line is arranged through the cylinder cavity of the isolation cylinder.

3. The leakage positioning device for a liquid carbon dioxide conveying pipeline according to claim 2, wherein, The positioning display component also includes a wiring harness column and a sliding sleeve. The wiring harness column is fixedly arranged in an isolation tube. The end of the wiring harness column adjacent to the main airbag is slidably connected with the sliding sleeve. The outer portion of the sliding sleeve is slidably fitted with the isolation tube. The first electrical connection block is fixedly connected to the inside of the sliding sleeve. A second electrical connection block corresponding to the first electrical connection block is fixedly arranged on the wiring harness column.

4. The leakage positioning device for a liquid carbon dioxide transportation pipeline according to claim 3, characterized in that, The inner sealing cover comprises a first inner sealing cover and a second inner sealing cover, the first inner sealing cover and the second inner sealing cover are sealingly buckled and connected, and the flange of the conveying pipeline is surrounded by a sealed inner cavity composed of the first inner sealing cover and the second inner sealing cover.

5. The leakage positioning device for a liquid carbon dioxide transportation pipeline according to claim 4, characterized in that, The secondary sealing cover is fixedly arranged on the first inner sealing cover, and the first inner sealing cover is provided with an air leakage component, which is used to expand the volume of the sealed inner cavity space of the first inner sealing cover.

6. The leakage positioning device for a liquid carbon dioxide conveying pipeline according to claim 5, wherein, The deflation component includes an isolation strip and a stripping component. The first inner sealing cover is provided with a plurality of protrusions, and an inner airbag is connected between adjacent protrusions. An isolation strip is provided on the outside of the inner airbag, and the stripping component is provided on the outside of the isolation strip. When the main airbag is located at the second inflation position, the stripping component controls the isolation strip to detach from between adjacent protrusions to the outside of the first inner sealing cover.

7. The leakage positioning device for a liquid carbon dioxide transportation pipeline according to claim 6, characterized in that, The component for removing includes a hole-punching component, a first puncturing needle, and an outer airbag. The outer airbag is connected to the isolation strip and wraps around the outside of the inner airbag. When the main airbag is in the second inflation position, the main airbag drives the first puncturing needle to puncture the isolation strip through the hole-punching component.

8. The leakage positioning device for a liquid carbon dioxide transportation pipeline according to claim 7, characterized in that, The hole-punching component includes a torsion plate, an abutting block, a guide rod, and a spring. A torsion plate is rotatably connected to one side of the auxiliary seal cover close to the main airbag. A torsion spring is sleeved on the rotating shaft of the torsion plate. The outside of the auxiliary seal cover is slidably connected with a guide rod through a sliding seat. One end of the guide rod close to the torsion plate is fixedly connected with an abutting block, and a spring is fixedly connected to the position of the guide rod close to the sliding seat. One end of the guide rod close to the isolation strip is fixedly connected with a first puncturing needle.

9. The leakage positioning device for a liquid carbon dioxide delivery pipeline according to claim 8, characterized in that, There are multiple isolation strips. Third suction blocks are fixedly connected to the opposite side surfaces of adjacent isolation strips. A second puncturing needle is arranged on the side of the isolation strip away from the auxiliary seal cover. When the isolation strip punctured by the first puncturing needle deflates and detaches from the first inner seal cover, the third suction blocks on the isolation strip adjacent to the deflated isolation strip adsorb and abut against the third suction blocks on the deflated isolation strip, and the second puncturing needle punctures the isolation strip adjacent to the deflated isolation strip.

10. A leakage positioning device for a liquid carbon dioxide transportation pipeline according to claim 9, characterized in that, In the radial direction of the first inner seal cover, the distance between adjacent convex parts gradually decreases.

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