A pig for a carbon dioxide pipeline

Abstract

The application belongs to the technical field of pipeline cleaning, and particularly discloses a pig for a carbon dioxide pipeline, which comprises a pig body and an electrostatic treatment unit, wherein the pig body comprises a pig framework and a leather cup, the leather cup is sleeved on the pig framework, the electrostatic treatment unit comprises an electrostatic adsorption module, an electrostatic locking module, a discharge module and an insulating plate, the electrostatic locking module and the discharge module are connected to the insulating plate, the electrostatic adsorption module is installed on the electrostatic locking module, and the electrostatic treatment unit is connected to the pig body. The application can realize adsorption and locking of electrostatic charges in the pigging process, separate the electrostatic treatment device from the pig body after the pigging operation is completed, realize discharge of the electrostatic treatment device through the discharge module, and enable the discharged electrostatic treatment device to be continuously installed on the pig for the next pigging operation, so that the electronic elements in the pig can be effectively prevented from being seriously damaged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pipeline cleaning, in particular to a pig for a carbon dioxide pipeline. BACKGROUND

[0002] Greenhouse gases are the main cause of the gradual rise in atmospheric temperature, especially CO2, so reducing the content of CO2 in the atmosphere is particularly important for mitigating the greenhouse effect. At present, it is widely believed that CCUS technology (carbon capture, utilization and storage) is a key technology for large-scale reduction of CO2. CCUS technology aims to capture carbon dioxide from large emission sources, transport it to a storage point or an oil and gas field, and store it safely in an underground reservoir or use it to improve oil recovery. CO2 pipeline transportation is an important channel for connecting carbon sources and oil and gas fields or storage points in this technology.

[0003] Because the CO2 gas source usually contains impurities, as the CO2 pipeline operates, the impurities in the gas will accumulate at the bottom of the pipeline, affecting the transportation efficiency of the pipeline, so it is necessary to regularly clean the CO2 pipeline. At present, the cleaning of the CO2 pipeline is carried out by using a pig for cleaning, and during the operation of the pig, static charges are generated due to extrusion and friction. The static charges on the surface of the pig can generate high voltage between the pig and the pipeline. The uneven conductivity of the electronic elements of the pig in the dry environment of the CO2 pipeline can affect the discharge position and strength of the pig, thereby causing serious damage to the electronic elements inside the pig (such as an intelligent pig). SUMMARY

[0004] The present application provides a pig for a carbon dioxide pipeline, which aims to effectively prevent the serious damage to the electronic elements inside the pig.

[0005] The present application is implemented by the following technical solution: a pig for a carbon dioxide pipeline, comprising a pig body and an electrostatic treatment unit, the pig body comprising a pig skeleton and a leather cup, the leather cup being sleeved on the pig skeleton;

[0006] The electrostatic treatment unit comprises an electrostatic adsorption module, an electrostatic locking module, a discharge module and an insulating plate, the electrostatic locking module and the discharge module being connected to the insulating plate, and the electrostatic adsorption module being installed on the electrostatic locking module; the electrostatic treatment unit is connected to the pig body.

[0007] The electrostatic treatment unit is connected to the pig body, the electrostatic adsorption module and the electrostatic locking module in the electrostatic treatment unit can realize adsorption and locking of electrostatic charges in the carbon dioxide pipeline pigging process, and can effectively prevent damage to the electronic components in the pig.

[0008] Further, the blocking block is arranged on the pig skeleton, and the blocking block limits the two sides of the leather cup.

[0009] Beneficial effect: the blocking block can limit the installation position of the leather cup, and the installation of the leather cup is more stable, and the blocking block provides an installation position for the safety of the electrostatic treatment unit, so that the installation is more convenient, and the pig body is not affected.

[0010] Further, the end of the insulating plate away from the electrostatic locking module and the discharge module is provided with a buckle, and the buckle can be buckled with the blocking block.

[0011] Beneficial effect: the insulating plate is buckled with the blocking plate in the scheme, which can realize quick connection and cooperation of the entire electrostatic treatment unit and the blocking plate, and the connection and disassembly mode is simple and convenient.

[0012] Further, the buckle includes a plurality of first buckles and a plurality of second buckles, the first buckles are in cylindrical shape, the second buckles are in cuboid shape, and the end face of the second buckle is provided with a clamping groove, and the plurality of first buckles and the plurality of second buckles are distributed along the periphery of the insulating plate.

[0013] Beneficial effect, the shape of the buckle in the scheme is set to cylindrical and clamping groove, which can improve the tightness of the connection and cooperation between the insulating plate and the blocking plate.

[0014] Further, the electrostatic adsorption module is provided with a plurality of electrostatic adsorption modules, and the plurality of electrostatic adsorption modules are distributed along the periphery of the electrostatic locking module.

[0015] Beneficial effect: the plurality of electrostatic adsorption modules distributed along the periphery of the electrostatic locking module in the scheme can improve the effect of adsorbing electrostatic charges, thereby improving the cleaning effect of the carbon dioxide pipeline.

[0016] Further, the electrostatic adsorption module is a metal layer.

[0017] Beneficial effect: such setting can make the adsorption of the electrostatic adsorption module stronger, thereby improving the cleaning effect of the carbon dioxide pipeline.

[0018] Further, the electrostatic locking module comprises a charge locking layer and a charge anti-transfer layer, and the charge locking layer is located between the charge anti-transfer layer and the electrostatic adsorption module.

[0019] Beneficial effects: In the scheme, the electrostatic adsorption module adsorbs the static electricity generated by friction during the pigging process and conducts it to the charge locking layer for locking, and the charge anti-transfer layer can prevent the static electricity from leaking from the charge locking layer.

[0020] Further, the charge locking layer is composed of graphene powder, epoxy resin, high-carbon fiber and porous aluminosilicate powder, and the charge anti-transfer layer is composed of PET resin and antistatic master batch.

[0021] Further, interfaces are symmetrically arranged on both sides of the electrostatic locking module, the interfaces penetrate the charge anti-transfer layer in the electrostatic locking module, and the interfaces are in contact with the charge locking layer of the electrostatic locking module.

[0022] Further, the discharge module comprises charge transfer wires, switches and a circuit board, the charge transfer wires are two, the two charge transfer wires are symmetrically arranged on both sides of the circuit board, one end of the charge transfer wires is connected with the circuit board, the other end of the charge transfer wires is connected with the interfaces of the charge locking module, and the switches are connected with the charge transfer wires.

[0023] Beneficial effects: The switches are kept off during the pigging operation to prevent charge transfer, and the two charge transfer wires and two switches can ensure that the discharge module can still operate normally when a certain wire or switch fails, thereby playing a backup effect.

[0024] Further, a grounding wire interface for connecting a grounding wire is arranged on the circuit board, an insulating shell is arranged outside the circuit board, the insulating shell comprises an upper insulating shell and a lower insulating shell connected with each other, and the circuit board is located between the upper insulating shell and the lower insulating shell.

[0025] Beneficial effects: In the scheme, the circuit board is located between the upper insulating shell and the lower insulating shell, which can protect the circuit board.

[0026] Further, two semicircular holes are arranged on the upper insulating shell and the lower insulating shell, the two semicircular holes on the upper insulating shell and the two semicircular holes on the lower insulating shell are mutually buckled to form two circular holes, and the circular holes are used for the charge transfer wires connected with the circuit board to pass through.

[0027] Beneficial effects: In the scheme, the two semicircular holes on the upper insulating shell and the lower insulating shell form a complete circular hole, which facilitates the passing of the charge transfer wires.

[0028] Compared with the prior art, the present application has the following advantages and beneficial effects:

[0029] The present application can realize the adsorption and locking of electrostatic charge in the CO2 pipeline pigging process by using the pig described above, can effectively prevent the damage of the electronic components inside the pig (such as the intelligent pig), and can separate the electrostatic treatment unit and the pig body after the pigging operation is completed, realize the discharge of the electrostatic treatment unit through the discharge module, and the electrostatic treatment unit after discharge can be installed on the pig for the next pigging operation. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows, and it should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor. In the drawings:

[0031] Figure 1 It is a front view of an embodiment of the pig for CO2 pipeline of the present application;

[0032] Figure 2 It is a perspective view of the electrostatic treatment unit in an embodiment of the pig for CO2 pipeline of the present application;

[0033] Figure 3 It is a perspective view of the electrostatic treatment unit in an embodiment of the pig for CO2 pipeline of the present application from another angle;

[0034] Figure 4 It is a structural schematic view of the circuit board in an embodiment of the pig for CO2 pipeline of the present application.

[0035] Markings in the drawings and corresponding names of parts:

[0036] Pig body 101, electrostatic treatment unit 102, leather cup 103, stop block 104, pig skeleton 105, electrostatic adsorption module 1, electrostatic locking module 2, discharge module 3, insulating plate 4, first buckle 5, second buckle 6, interface 9, charge transfer wire 10, switch 11, circuit board 12, ground wire interface 13, insulating shell 14, upper insulating shell 15, lower insulating shell 16, screw 17. DETAILED DESCRIPTION

[0037] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application but not all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0039] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0040] In the description of the present application, it should be noted that the terms "first", "second", "third" and the like are only used to distinguish description, and cannot be understood as indicating or implying relative importance.

[0041] In the description of the present application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set", "mount", "connect", "connect" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0042] As Figures 1-4 shown, the present embodiment provides a pig for carbon dioxide pipeline, which comprises a pig body 101 and an electrostatic treatment unit 102, the pig body 101 comprises a pig skeleton 105 and a leather cup 103, the leather cup 103 is sleeved on the pig skeleton 105; in the present embodiment, four leather cups 103 are arranged in sequence along the axial direction of the pig skeleton 105, a stop block 104 is arranged on the pig skeleton 105, the stop block 104 is annular, the stop block 104 is fixedly connected with the pig skeleton 105, and the two sides of the leather cup 103 are both provided with the stop block 104, so that the stop block 104 limits the two sides of the leather cup 103.

[0043] In combination Figure 2As shown, the electrostatic treatment unit 102 includes an electrostatic adsorption module 1, an electrostatic locking module 2, a discharge module 3, and an insulating plate 4. The electrostatic locking module 2 and the discharge module 3 are connected to the insulating plate 4, the electrostatic adsorption module 1 is installed on the electrostatic locking module 2, and specifically, in this embodiment, the electrostatic adsorption module 1 is provided in multiple numbers, the multiple electrostatic adsorption modules 1 are distributed along the periphery of the electrostatic locking module 2 in sequence, the electrostatic adsorption module 1 in this embodiment is in a rectangular shape, and the multiple electrostatic adsorption modules 1 are distributed along the four peripheries of the electrostatic adsorption module 1 at intervals. The electrostatic adsorption module 1 in this embodiment is composed of multiple metal layers with high electrical conductivity. The electrostatic treatment unit 102 is connected to the pig body 101, and in this embodiment, the electrostatic treatment unit 102 is clamped and connected to the stop block 104 on the pig body 101, and specifically,

[0044] As shown in Figure 3 The end of the insulating plate 4 away from the electrostatic locking module 2 and the discharge module 3 is provided with a buckle, which can be buckled with the stop block 104. In this embodiment, the buckle includes four first buckles 5 and four second buckles 6. The first buckle 5 is in a cylindrical shape, and the second buckle 6 is in a rectangular shape, and a clamping groove is formed on the end face of the second buckle 6. The four first buckles 5 and the four second buckles 6 are distributed along the periphery of the insulating plate 4 at intervals. The stop block 104 has recesses and clamping blocks (not shown in the figure) that cooperate with the first buckles 5 and the second buckles 6. The first buckle 5 can be inserted into the recess of the stop block 104, and the second buckle 6 can be clamped with the clamping block on the stop block 104. The insulating plate 4 is connected to the stop block 104 on the pig body 101 through the first buckle 5 and the second buckle 6, thereby realizing the connection and cooperation between the entire electrostatic treatment unit 102 and the stop block 104.

[0045] The two different clamping shapes of the first buckle 5 and the second buckle 6 can improve the tightness of the connection and cooperation between the stop block 104 and the insulating plate 4.

[0046] The electrostatic locking module 2 in this embodiment includes a charge locking layer and a charge anti-shift layer. The charge locking layer is located between the charge anti-shift layer and the electrostatic adsorption module 1. The charge locking layer is composed of graphene powder, epoxy resin, high-carbon fiber, and porous aluminosilicate powder. The charge anti-shift layer is composed of PET resin and antistatic masterbatch.

[0047] In this embodiment, the charge locking layer is arranged between the electrostatic adsorption module 1 and the charge anti-shift layer. The electrostatic adsorption module 1 adsorbs the static electricity generated by friction during the pigging process and conducts it to the charge locking layer for locking. The charge anti-shift layer can prevent the static electricity from leaking from the charge locking layer.

[0048] As shown in Figure 2 The electrostatic locking module 2 is symmetrically provided with interfaces 9 on both sides. The interfaces 9 penetrate the charge anti-shift layer in the electrostatic locking module 2, and the interfaces 9 can be in contact with the charge locking layer of the electrostatic locking module.

[0049] The discharge module 3 in the embodiment comprises two charge transfer wires 10, two switches 11 and a circuit board 12. The two charge transfer wires 10 in the discharge module 3 are symmetrically arranged on two sides of the circuit board 12. One end of the charge transfer wire 10 is connected to the circuit board 12, and the other end of the charge transfer wire 10 is connected to the interface 9 of the charge locking module. The two switches 11 are respectively connected to the two charge transfer wires 10.

[0050] The two charge transfer wires 10 and the two switches 11 in the embodiment can ensure that the discharge module 3 can still operate normally when a certain wire or switch 11 has a problem.

[0051] One end of the charge transfer wire 10 is connected to the interface 9, and the other end is connected to the circuit board 12. During the pigging operation, the switch 11 is kept open to prevent charge transfer.

[0052] As shown in Figure 2 and Figure 4 , the circuit board 12 is provided with a ground wire interface 13 for connecting a ground wire. An insulating shell 14 is arranged outside the circuit board 12. The insulating shell 14 comprises an upper insulating shell 15 and a lower insulating shell 16 which are connected to each other. The circuit board 12 is located between the upper insulating shell 15 and the lower insulating shell 16.

[0053] The upper insulating shell 15 and the lower insulating shell 16 are connected and fixed by screws 17. The outer side of the screws 17 is coated with an insulating material.

[0054] The upper insulating shell 15 and the lower insulating shell 16 are each provided with two semicircular holes. The two semicircular holes on the upper insulating shell 15 and the two semicircular holes on the lower insulating shell 16 are mutually buckled to form two circular holes. The circular holes are used for the charge transfer wires 10 connected to the circuit board 12 to pass through.

[0055] The specific implementation process is as follows: During the pigging process, the static electricity in the pipeline is adsorbed by the static electricity adsorption module 1, conducted and locked in the charge locking layer of the static electricity locking module 2. Since the switch 11 is kept open during the pigging process, the charge locked in the charge locking layer will not leak or transfer under the protection of the charge anti-transfer layer.

[0056] Since the electrostatic treatment unit 102 is connected with the pig body 101 through the buckle connection with the stopper 104, the electrostatic treatment unit 102 is convenient to be detached and installed from the pig body 101. After the pigging is finished, the pig body 101 and the electrostatic treatment unit 102 are separated, the electrostatic treatment unit 102 is discharged, the upper insulating shell 15 is separated from the electrostatic treatment unit 102 by unscrewing the screw 17, the grounding wire interface 13 of the circuit board 12 is exposed, the grounding wire is connected with the grounding wire interface 13, only one switch 11 is closed, the discharge circuit is formed, the static electricity absorbed in the pigging process is grounded and discharged, and the discharge treatment device after the discharge is finished can be used repeatedly.

[0057] The above specific embodiments further explain the purpose, technical scheme and beneficial effects of the present application. It should be understood that the above description is only a specific embodiment of the present application and is not used to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A pig for a carbon dioxide pipeline, characterized in that, The pig body comprises a pig skeleton and a leather cup, and the leather cup is sleeved on the pig skeleton; The electrostatic treatment unit comprises an electrostatic adsorption module, an electrostatic locking module, a discharge module and an insulating plate, the electrostatic locking module and the discharge module are connected to the insulating plate, and the electrostatic adsorption module is installed on the electrostatic locking module; the electrostatic treatment unit is connected to the pig body; the electrostatic locking module comprises a charge locking layer and a charge anti-transfer layer, and the charge locking layer is located between the charge anti-transfer layer and the electrostatic adsorption module.

2. A pipe pig for a carbon dioxide pipeline according to claim 1, characterized in that The pig skeleton is provided with a stopper, the stopper limits both sides of the leather cup, and the electrostatic treatment unit is clamped and connected with the stopper.

3. A pipe pig for a carbon dioxide pipeline according to claim 2, characterised in that, The end of the insulating plate away from the electrostatic locking module and the discharge module is provided with a buckle, and the buckle can be buckled with the stopper.

4. A pipe pig for a carbon dioxide pipeline according to claim 3, characterised in that, The buckle comprises a plurality of first buckles and a plurality of second buckles, the first buckles are in a cylindrical shape, the second buckles are in a cuboid shape, and a clamping groove is formed in the end face of the second buckle, and the plurality of first buckles and the plurality of second buckles are distributed along the periphery of the insulating plate.

5. A pipe pig for a carbon dioxide pipeline according to claim 1, characterized in that, The electrostatic adsorption module is provided with a plurality of electrostatic adsorption modules, and the plurality of electrostatic adsorption modules are distributed along the periphery of the electrostatic locking module.

6. A pipe pig for a carbon dioxide pipeline according to claim 5, wherein, The electrostatic adsorption module is a metal layer.

7. A pipe pig for a carbon dioxide pipeline according to claim 1, characterized in that, The charge locking layer is composed of graphene powder, epoxy resin, high-carbon fiber and porous aluminosilicate powder, and the charge anti-transfer layer is composed of PET resin and antistatic master batch.

8. A pipe pig for a carbon dioxide pipeline according to claim 1, characterized in that The electrostatic locking module is provided with interfaces symmetrically arranged on both sides, the interfaces penetrate the charge anti-transfer layer in the electrostatic locking module, and the interfaces are in contact with the charge locking layer of the electrostatic locking module.

9. A pipe pig for a carbon dioxide pipeline according to claim 8, characterised in that, The discharge module comprises charge transfer wires, a switch and a circuit board, the charge transfer wires have two, the two charge transfer wires are symmetrically arranged on both sides of the circuit board, one end of the charge transfer wires is connected to the circuit board, the other end of the charge transfer wires is connected to the interfaces of the charge locking module, and the switch is connected to the charge transfer wires.

10. A pipe pig for a carbon dioxide pipeline according to claim 9, characterized in that The circuit board is provided with a grounding wire interface for connecting a grounding wire, the circuit board is provided with an insulating shell, the insulating shell comprises an upper insulating shell and a lower insulating shell connected to each other, and the circuit board is located between the upper insulating shell and the lower insulating shell.

11. A pipe pig for a carbon dioxide pipeline according to claim 10, wherein, The upper insulating shell and the lower insulating shell are both provided with two semicircular holes, the two semicircular holes on the upper insulating shell and the two semicircular holes on the lower insulating shell are buckled with each other to form two circular holes, and the circular holes are used for the charge transfer wires connected to the circuit board to pass through.

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