Power system for internal welding machine

Abstract

The application relates to a power system of an internal welding machine and belongs to the technical field of oil and gas pipeline welding. The power system comprises a rack, multiple groups of electric drive wheels, a first gas storage assembly, a second gas storage assembly, a buffer gas supply part assembly and a power supply unit; the first gas storage assembly is used for storing high-pressure air; the second gas storage assembly is used for storing a protective gas for gas shielded welding; the air outlet end of the first buffer gas supply tank is communicated with the air inlet end of the pneumatic part of the internal welding machine through a pipeline, and the air outlet end of the second buffer gas supply tank is communicated with the air inlet end of the welding torch of the internal welding machine through a pipeline; the power supply unit comprises two groups of storage batteries, one group of storage batteries is electrically connected with the multiple groups of electric drive wheels, and the other group of storage batteries is electrically connected with the welding torch of the internal welding machine. By adopting the application, the power system can independently travel, and only a short conveying pipe and cable are needed to convey the protective gas, compressed air and electric energy to the internal welding machine, so that the safety hidden danger of pipeline welding can be reduced.

Description

Technical Field

[0001] This application relates to the field of oil and gas pipeline welding technology, and in particular to a power system for an internal welding machine. Background Technology

[0002] Currently, in the field of oil and gas pipeline welding, internal welding machines are mainly used for automatic welding to complete the pipeline welding. These machines require protective gas and electrical energy during welding. During the pipeline welding process, after each section of pipeline is welded, the internal welding machine needs to move forward to the pipe opening where the weld was just completed and then complete the welding of the next section. Compressed air is required to power the internal welding machine as it moves within the pipeline.

[0003] Currently, in the process of pipe welding using internal welding machines, cables and multiple transport pipes are typically connected at the rear of the machine. The cables provide the welding power required for the internal welding machine, while the transport pipes deliver the shielding gas and compressed air needed for welding and movement, respectively. In multi-pipe welding scenarios, the length of the transport pipes and cables increases with the number of pipes. Excessively long transport pipes and cables pose a significant risk of breakage, resulting in substantial safety hazards in the automated welding process.

[0004] Therefore, there is an urgent need for a power system capable of independent movement to solve the above problems. Summary of the Invention

[0005] This application provides a power system for an internal welding machine, which can solve the technical problems existing in related technologies. The technical solution is as follows:

[0006] This application provides a power system for an internal welding machine, the power system including a frame, multiple sets of electric drive wheels, a first gas storage component, a second gas storage component, a buffer gas supply component, and a power supply unit;

[0007] The frame includes a first partition, a second partition, a first support plate, a second support plate, and multiple first support bars; the first partition and the second partition are parallel, the first support plate and the second support plate are parallel and perpendicular to the first partition, the two ends of the first support plate and the second support plate are respectively connected to the first partition and the second partition, and the multiple first support bars are all parallel to the first support plate, and the two ends of the multiple first support bars are respectively connected to the first partition and the second partition;

[0008] The multiple sets of electric drive wheels include a first front electric drive wheel, a second front electric drive wheel, a first rear electric drive wheel, and a second rear electric drive wheel; the first front electric drive wheel and the second front electric drive wheel are located on the side of the first partition away from the second partition and are connected to the first partition; the first rear electric drive wheel and the second rear electric drive wheel are located on the side of the second partition away from the first partition and are connected to the second partition.

[0009] The first gas storage assembly includes a first tank and a first pressure reducer; the first tank is located between two adjacent first support bars and is connected to the two first support bars, the air inlet of the first pressure reducer is connected to the first tank opening of the first tank, and the first gas storage assembly is used to store high-pressure air;

[0010] The second gas storage assembly includes a second tank and a second pressure reducer; the second tank is located between two adjacent first support bars and is connected to the two first support bars, the inlet end of the second pressure reducer is connected to the second tank opening of the second tank, and the second gas storage assembly is used to store the protective gas for gas shielded welding.

[0011] The buffer air supply assembly includes a fixed frame, multiple first buffer air supply tanks, and second buffer air supply tanks. The fixed frame includes a third partition and multiple fixed plates. The third partition is located on the side of the second partition away from the first partition and is parallel to the second partition. The multiple fixed plates are located between the third partition and the second partition, and both ends of each fixed plate are connected to the second partition and the third partition, respectively. The multiple first buffer air supply tanks and the second buffer air supply tanks are all located on the side of the third partition away from the second partition and are all connected to the third partition. The air inlet ends of the multiple first buffer air supply tanks are all connected to the air outlet ends of the first pressure reducer through pipelines. The air outlet ends of the multiple first buffer air supply tanks are all connected to the air inlet ends of the pneumatic components of the internal welding machine through pipelines. The air inlet ends of the second buffer air supply tanks are connected to the air outlet ends of the second pressure reducer through pipelines. The air outlet ends of the second buffer air supply tanks are all connected to the air inlet ends of the welding torch of the internal welding machine through pipelines.

[0012] The power supply unit includes two sets of batteries; the two sets of batteries are located on the side of the first support plate or the second support plate near the first support bar and are connected to the first support plate or the second support plate, one set of batteries is electrically connected to the multiple sets of electric drive wheels, and the other set of batteries is electrically connected to the welding gun of the internal welding machine.

[0013] In one possible implementation, the frame further includes a third support plate and a plurality of arc-shaped frames. The third support plate is located on the side of the first partition away from the second partition and is perpendicular to the first partition. One end of the third support plate is connected to the first partition. The plurality of arc-shaped frames are located on the side of the first partition away from the second partition and on the side of the third support plate away from the electric drive wheel. Both ends of each arc-shaped frame are connected to the first partition and the third support plate, respectively.

[0014] In one possible implementation, the frame further includes a plurality of air inlets, all of which are parallel to the third support plate and each air inlet is connected to the side wall of the arc frame (17).

[0015] In one possible implementation, the power system further includes a cable loop connected to the other end of the third support plate, the cable loop being used to fasten the hook of the inner welding machine.

[0016] In one possible implementation, the first partition has a regular octagonal structure, the first front electric drive wheel and the second front electric drive wheel are symmetrical about a first plane, the first rear electric drive wheel and the second rear electric drive wheel are symmetrical about a first plane, and the first plane is a plane that passes through the vertical axis of symmetry of the first partition and is perpendicular to the first support plate.

[0017] In one possible implementation, the angle between the perpendicular line from the first front electric drive wheel to the axis of the first partition and the perpendicular line from the second front electric drive wheel to the axis is 90°, and the angle between the perpendicular line from the first rear electric drive wheel to the axis and the perpendicular line from the second rear electric drive wheel to the axis is 90°.

[0018] In one possible implementation, the frame further includes an elastic telescopic member and a support wheel. The elastic telescopic member is located between the second partition and the third partition and is connected to the second partition. The telescopic end of the elastic telescopic member is connected to the support wheel, which extends out of the fixed frame and contacts the upper wall of the pipe.

[0019] In one possible implementation, the buffer air supply assembly further includes a fourth partition and a plurality of second support bars. The fourth partition is parallel to the third partition and is located on the side of the plurality of first buffer air supply tanks and second buffer air supply tanks away from the second partition, and is connected to the plurality of first buffer air supply tanks and second buffer air supply tanks. The plurality of second support bars are located between the third partition and the fourth partition, and both ends of each second support bar are connected to the third partition and the fourth partition, respectively.

[0020] In one possible implementation, the power supply unit includes five batteries, one of which is electrically connected to the plurality of electric drive wheels, and the other four batteries are electrically connected to the welding torch of the internal welding machine.

[0021] In one possible implementation, the power system further includes a tank holder located on the side of the first support bar away from the first support plate and connected to the first support bar, the tank holder being used to limit the movement of the first tank and the second tank.

[0022] The technical solutions provided by the embodiments of this application have at least the following beneficial effects:

[0023] This application provides a power system for an internal welding machine. In this system, a first gas storage component stores high-pressure air, and a second gas storage component stores shielding gas for gas-shielded welding. The outlet of a first buffer gas supply tank is connected to the inlet of the pneumatic components of the internal welding machine via a pipeline, and the outlet of the second buffer gas supply tank is connected to the inlet of the welding torch of the internal welding machine via a pipeline. The power supply unit includes two sets of batteries, one set electrically connected to multiple sets of electric drive wheels, and the other set electrically connected to the welding torch of the internal welding machine. The power system can operate independently under battery power, thus requiring only a shorter delivery pipe and cable to supply shielding gas, compressed air, and electrical energy to the internal welding machine, thereby reducing the safety hazards associated with pipeline welding.

[0024] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of a power system shown in an embodiment of this application;

[0027] Figure 2 This is a schematic diagram of the structure of a power system shown in an embodiment of this application;

[0028] Figure 3 This is a schematic diagram of the structure of a power system shown in an embodiment of this application.

[0029] Legend

[0030] 1. Frame; 2. Electric drive wheel; 3. First gas storage assembly; 4. Second gas storage assembly; 5. Buffer gas supply assembly; 6. Power supply unit; 7. Cable sheath; 8. Tank body holder; 11. First partition; 12. Second partition; 13. First support plate; 14. Second support plate; 15. First support bar; 16. Third support plate; 17. Arc frame; 18. Gas duct plug; 19. Elastic telescopic component; 110. Support wheel;

[0031] 21. First front electric drive wheel; 22. Second front electric drive wheel; 23. First rear electric drive wheel; 24. Second rear electric drive wheel; 31. First tank body; 32. First pressure reducer;

[0032] 41. Second tank body; 42. Second pressure reducer; 51. Fixing frame; 511. Third partition;

[0033] 512. Fixed plate; 52. First buffer air supply tank; 53. Second buffer air supply tank; 54. Fourth partition plate; 55. Second support bar;

[0034] 61. Storage battery; 62. Inductive component; 63. Charger. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0036] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” “third,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an” or “a” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “comprising” or “including” and similar terms mean that the elements or objects preceding “comprising” or “including” encompass the elements or objects listed following “comprising” or “including” and their equivalents, and do not exclude other elements or objects. The terms “connected” or “linked” and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms “upper,” “lower,” “left,” “right,” etc., are used only to indicate relative positional relationships; when the absolute position of the described objects changes, the relative positional relationship may also change accordingly.

[0037] This application provides a power system for an internal welding machine. This power system can move independently and can supply protective gas, compressed air and electrical energy to the internal welding machine with only a short delivery pipe and cable, thereby reducing the safety hazards of pipeline welding.

[0038] Figure 1 This is a schematic diagram of the power system of an internal welding machine according to an embodiment of this application. The power system includes a frame 1, multiple sets of electric drive wheels 2, a first gas storage assembly 3, a second gas storage assembly 4, a buffer gas supply assembly 5, and a power supply unit 6. Specifically: the frame 1 includes a first partition 11, a second partition 12, a first support plate 13, a second support plate 14, and multiple first support bars 15. The multiple sets of electric drive wheels 2 include a first front electric drive wheel 21, a second front electric drive wheel 22, a first rear electric drive wheel 23, and a second rear electric drive wheel 24. The first gas storage assembly 3 includes a first tank 31 and a first pressure reducer 32. The second gas storage assembly 4 includes a second tank 41 and a second pressure reducer 42. The buffer gas supply assembly 5 includes a fixing frame 51, multiple first buffer gas supply tanks 52, and a second buffer gas supply tank 53. The fixing frame 51 includes a third partition 511 and multiple fixing plates 512. The power supply unit 6 includes two sets of batteries 61.

[0039] The following sections will introduce each part of the power system.

[0040] I. Rack 1

[0041] Frame 1 is the component of the power system used to fix the various components.

[0042] like Figure 1 As shown, the frame 1 includes a first partition 11, a second partition 12, a first support plate 13, a second support plate 14, and multiple first support bars 15.

[0043] First partition 11 and second partition 12

[0044] Both the first partition 11 and the second partition 12 have a plate-like structure, and both are regular octagons, placed coaxially. The side length of both the first partition 11 and the second partition 12 is D1, and their thickness can both be 0.2D1. The distance between the first partition 11 and the second partition 12 can be a first spacing, wherein the first spacing is twice the distance between two opposite sides of the first partition 11.

[0045] First support plate 13 and second support plate 14

[0046] The first support plate 13 and the second support plate 14 both have a rectangular plate structure. The first support plate 13 and the second support plate 14 are placed parallel to each other and are both perpendicular to the first partition plate 11.

[0047] The first support plate 13 and the second support plate 14 can form a support plate assembly, with both ends of the support plate assembly connected to the first partition 11 and the second partition 12, respectively. The support plate assembly and the first partition 11 and the second partition 12 can be fixedly connected by welding or by bonding, etc. The connection relationship between the support plate assembly and the first partition 11 and the second partition 12 is not limited here.

[0048] First support bar 15

[0049] Multiple first support bars 15 are located on the side of the first support plate 13 away from the second support plate 14, and are situated between the first partition plate 11 and the second partition plate 12. The multiple first support bars 15 are parallel to each other and are all parallel to the first support plate 13.

[0050] The two ends of the multiple first support bars 15 are respectively connected to the first partition 11 and the second partition 12. The first support bars 15 and the first partition 11 and the second partition 12 can be fixedly connected by welding, or by adhesive, snap-fit ​​or other methods. There are no restrictions on the connection relationship between the first support bars 15 and the first partition 11 and the second partition 12.

[0051] Optionally, the number of first support bars 15 can be three. And the distance between every two first support bars 15 can be D2.

[0052] II. Electric Drive Wheel 2

[0053] The electric drive wheel 2 is a component in the power system used to move within the pipeline.

[0054] The multiple sets of electric drive wheels 2 include a first front electric drive wheel 21, a second front electric drive wheel 22, a first rear electric drive wheel 23, and a second rear electric drive wheel 24.

[0055] The first front electric drive wheel 2 includes an electric drive wheel frame 211 and a wheel body 212. The wheel body 212 is connected to the electric drive wheel frame 211 via a rotating shaft. The structures of multiple sets of electric drive wheels 2 are completely identical. The second front electric drive wheel 22, the first rear electric drive wheel 23, and the second rear electric drive wheel 24 can refer to the structure of the first front electric drive wheel 2 described above, and will not be repeated here.

[0056] The first front electric drive wheel 21 and the second front electric drive wheel 22 are located on the side of the first partition 11 away from the second partition 12, and the electric drive wheel frames 211 of the first front electric drive wheel 21 and the second front electric drive wheel 22 are connected to the first partition 11. The first rear electric drive wheel 23 and the second rear electric drive wheel 24 are located on the side of the second partition 12 away from the first partition 11, and the electric drive wheel frames 211 of the first rear electric drive wheel 23 and the second rear electric drive wheel 24 are connected to the second partition 12. The connection between the electric drive wheel frames 211 and the first partition 11 can be by welding or other methods.

[0057] III. First Gas Storage Component 3

[0058] The first air storage assembly 3 is a component in the power system used to store high-pressure air.

[0059] like Figure 1 As shown, the first gas storage assembly 3 includes a first tank 31 and a first pressure reducer 32.

[0060] First tank 31

[0061] The first tank 31 is a cylindrical tank that stores high-pressure air. The length of the first tank 31 is less than the first spacing, and the outer diameter of the first tank 31 is D3, where D2 < D3 < 1.5D2.

[0062] The first tank 31 is located between the first partition 11 and the second partition 12, and is engaged between two adjacent first support bars 15. The first opening of the first tank 31 is connected to the air inlet of the first pressure reducer 32.

[0063] First pressure reducer 32

[0064] The first pressure reducer 32 is located between the first tank opening and the first partition 11. The air inlet of the first pressure reducer 32 is connected to the first tank opening of the first tank body 31, and the air outlet of the first pressure reducer 32 is connected to the air outlets of multiple first buffer air supply tanks 52 through pipelines.

[0065] Optionally, pressure gauges can be installed at the inlet and outlet of the first pressure reducer 32. These pressure gauges can detect the first pressure value inside the first tank 31, and the second pressure value of the high-pressure air after it has been reduced in pressure by the first pressure reducer 32 (i.e., the pressure value inside the first buffer air supply tank 52). When the second pressure value is less than the first preset pressure value, the first pressure reducer 32 is in the open state, allowing the high-pressure air inside the first tank 31 to flow through the first pressure reducer 32 and complete the pressure reduction, and then allowing the reduced-pressure air to enter the first buffer air supply tank 52 through a pipeline.

[0066] IV. Second Gas Storage Component 4

[0067] The second gas storage component 4 is a part of the power system used to store the shielding gas for gas-shielded welding. This shielding gas can be argon or carbon dioxide.

[0068] like Figure 1 As shown, the second gas storage assembly 4 includes a second tank 41 and a second pressure reducer 42.

[0069] Second tank 41

[0070] The structure of the second tank 41 is the same as that of the first tank 31. The structural characteristics of the second tank 41 can be referenced as a cylindrical tank, which will not be described again here.

[0071] The second tank 41 is located between the first partition 11 and the second partition 12, and is engaged between two other adjacent first support bars 15. The second opening of the second tank 41 is connected to the air inlet of the second pressure reducer 42.

[0072] Second pressure reducer 42

[0073] The second pressure regulator 42 is located between the second tank opening and the first partition 11. The inlet of the second pressure regulator 42 is connected to the second tank opening of the second tank body 41, and the outlet of the second pressure regulator 42 is connected to the outlet of the second buffer air supply tank 53 through a pipeline.

[0074] Optionally, pressure gauges can also be installed at the inlet and outlet of the second pressure regulator 42. These pressure gauges can detect a third pressure value within the second tank 41, and a fourth pressure value after the high-pressure protective gas has been reduced by the second pressure regulator 42. When the fourth pressure value is less than the second preset pressure value, the second pressure regulator 42 is in the open state, allowing the protective gas in the second tank 41 to flow through the second pressure regulator 42 and complete the pressure reduction, and then allowing the reduced-pressure protective gas to enter the second buffer gas supply tank 53 through a pipeline.

[0075] V. Buffer Air Supply Unit 5

[0076] like Figure 1 As shown, the buffer air supply unit assembly includes 5 fixed brackets 51, multiple first buffer air supply tanks 52 and second buffer air supply tanks 53.

[0077] Fixture 51

[0078] The mounting bracket 51 includes a third partition 511 and multiple mounting plates 512.

[0079] The third partition 511 is located on the side of the second partition 12 away from the first partition 11 and is placed parallel to the second partition 12. Multiple fixing plates 512 each have a rectangular plate structure, and their ends are connected to the second partition 12 and the third partition 511, respectively. The fixing plates 512 can be fixedly connected to the second partition 12 and the third partition 511 by welding, adhesive, snap-fit, or other methods. No limitations are placed here regarding the connection relationship between the fixing plates 512 and the second and third partitions 12 and 511.

[0080] First buffer gas supply tank 52 and second buffer gas supply tank 53

[0081] Both the first buffer gas supply tank 52 and the second buffer gas supply tank 53 are cylindrical gas tanks. The number of first buffer gas supply tanks 52 can be three, and the number of second buffer gas supply tanks 53 can be one.

[0082] The first buffer air supply tank 52 and the second buffer air supply tank 53 are both located on the side of the third partition 511 away from the second partition 12, and are both connected to the third partition 511. The first buffer air supply tank 52 and the second buffer air supply tank 53 can be fixedly connected to the third partition 511 by bolts.

[0083] The air inlets of the three first buffer air supply tanks 52 are all connected to the air outlet of the first pressure reducer 32 via pipelines. The air outlets of these three first buffer air supply tanks 52 can also be connected to the air inlets of different pneumatic components of the inner welding machine via pipelines. For example, the air outlets of the three first buffer air supply tanks 52 can be connected to the air inlets of the front pneumatic wheel, the rear pneumatic wheel, and the cylinder of the inner welding machine via pipelines, respectively.

[0084] The inlet of the second buffer air supply tank 53 is connected to the outlet of the second pressure reducer 42 through a pipeline, and the outlet of the second buffer air supply tank 53 is connected to the inlet of the welding torch of the inner welding machine through a pipeline.

[0085] The pressure in the first buffer air supply tank 52 and the second buffer air supply tank 53 can be detected by pressure gauges. As the buffer air supply tanks supply air to various components of the internal welding machine, the pressure in both the first buffer air supply tank 52 and the second buffer air supply tank 53 will decrease. When the second pressure in the first buffer air supply tank 52 is less than the first preset pressure value, it indicates that the amount of air in the first buffer air supply tank 52 is low. At this time, the first pressure reducer 32 opens, allowing the high-pressure air in the first tank 31 to flow through the first pressure reducer 32 and complete the pressure reduction. The reduced air then enters the first buffer air supply tank 52 through the pipeline, ensuring that the first buffer air supply tank 52 stores sufficient air. Similarly, when the fourth pressure in the second buffer air supply tank 53 is less than the second preset pressure value, the second pressure reducer 42 opens, ensuring that the second buffer air supply tank 53 stores sufficient protective gas.

[0086] VI. Power Supply Unit 6

[0087] like Figure 1 As shown, the power supply unit 6 has two sets of batteries 61. One set of batteries 61 is electrically connected to multiple sets of electric drive wheels 2, and the other set of batteries 61 is electrically connected to the welding torch of the internal welding machine. The batteries 61 can be lithium-ion batteries or lead-acid batteries.

[0088] Alternatively, the number of batteries 61 can be five.

[0089] Two batteries 61 are located on the side of the first support plate 13 near the first support rod 15 and are connected to the first support plate 13. The other three batteries 61 are located on the side of the second support plate 14 near the first support rod 15 and are connected to the second support plate 14. The batteries 61 can be fixedly connected to the support plates with bolts.

[0090] Optionally, of the five batteries 61, one battery 61 is used to be electrically connected to multiple sets of electric drive wheels 2, and the other four batteries 61 are electrically connected to the welding gun of the internal welding machine.

[0091] Optionally, the power supply unit 6 may also include multiple inductor elements 62.

[0092] like Figure 2 As shown, multiple inductor elements 62 are located on the side of the first support plate 13 near the first support bar 15 and are connected to the first support plate 13.

[0093] The aforementioned multiple inductors 62 can be electrically connected to the aforementioned four batteries 61 through a series circuit. The multiple inductors 62 and the aforementioned four batteries 61 connected in series can be electrically connected to the welding torch of the internal welding machine through a cable, serving as the welding power source for the welding torch of the internal welding machine.

[0094] Optionally, the power supply unit 6 may further include a charger 63, which is located on the side of the first support plate 13 near the first support rod 15 and is connected to the first support plate 13. The charger 63 is connected to each battery 61 via a circuit.

[0095] In this way, the battery 61 does not need to be removed when charging, which improves the convenience of charging.

[0096] The following section elaborates on some of the optional structural features of the power system:

[0097] One structural feature is that the frame 1 may also include a third support plate 16 and multiple arc-shaped frames 17.

[0098] like Figure 1 As shown, the third support plate 16 is located on the side of the first partition 11 away from the second partition 12 and is perpendicular to the first partition 11. One end of the third support plate 16 is connected to the first partition 11. Multiple arc-shaped frames 17 are located on the side of the first partition 11 away from the second partition 12 and on the side of the third support plate 16 away from the electric drive wheel 2. Both ends of each arc-shaped frame 17 are connected to the first partition 11 and the third support plate 16, respectively.

[0099] Optionally, the frame 1 also includes a plurality of air inlets 18, each of which has a hollow cylindrical structure.

[0100] Multiple air inlets 18 are parallel to the third support plate 16, and each air inlet 18 is connected to the side wall of the arc frame 17.

[0101] In this way, the pipe connected to the outlet end of the first buffer air supply tank 52 or the second buffer air supply tank 53 can be connected to the first end of the air guide plug 18, and the pipe connected to the inlet end of the welding torch or pneumatic component of the internal welding machine can be connected to the second end of the air guide plug 18, making pipe installation convenient.

[0102] Optionally, the power system may also include a cable sleeve 7, which has a plate-like structure and a circular through hole at its end face.

[0103] like Figure 1 As shown, the cable sleeve 7 is connected to the other end of the third support plate 16. The cable sleeve 7 and the third support plate 16 can be fixedly connected by bolts or by welding. There are no restrictions on the connection relationship between the cable sleeve 7 and the third support plate 16.

[0104] In this way, a hook can be installed at the tail of the inner welding machine. This hook can pass through the circular through hole of the cable sleeve 7 and be fastened to the cable sleeve 7. When the electric drive wheel 2 of the power system fails, the inner welding machine can use the hook to pull the power system away from the pipeline.

[0105] The second structural feature is that the buffer air supply component 5 may also include an elastic telescopic component 19 and a support wheel 110.

[0106] like Figure 2 As shown, the elastic telescopic member 19 is located between the second partition 12 and the third partition 511, and is connected to the second partition 12. The telescopic end of the elastic telescopic member 19 is connected to the support wheel 110. The elastic telescopic member 19 can be a compression spring or a cylinder.

[0107] When the power system travels inside the pipe, the support wheel 110 extends beyond the fixed frame 51 and contacts the upper wall of the pipe.

[0108] In this way, when the support wheel 110 contacts the upper wall of the pipe, the elastic expansion member 19 can be based on the supporting force of the support wheel 110. Under the action of this supporting force, the upper wall of the pipe will be subjected to a downward pressure from the power system. Under the action of this pressure, the friction between the multiple sets of electric drive wheels 2 and the pipe increases, thereby preventing the multiple sets of electric drive wheels 2 from slipping during their movement in the pipe.

[0109] The third structural feature is that the first front electric drive wheel 21 and the second front electric drive wheel 22 can be symmetrical about the first plane.

[0110] like Figure 3As shown, the first rear electric drive wheel 23 and the second rear electric drive wheel 24 can also be symmetrical about the first plane, wherein the first plane is a plane that passes through the vertical axis of symmetry of the first partition 11 and is perpendicular to the first support plate 13.

[0111] In this way, the first support plate 13 can always be parallel to the horizontal plane as the power system travels in the pipeline.

[0112] Optionally, such as Figure 3 As shown, the angle between the perpendicular line from the first front electric drive wheel 21 to the axis of the first partition 11 and the perpendicular line from the second front electric drive wheel 22 to the axis of the first partition 11 can be 90°, and the angle between the perpendicular line from the first rear electric drive wheel 23 to the axis of the first partition 11 and the perpendicular line from the second rear electric drive wheel 24 to the axis of the first partition 11 can also be 90°.

[0113] This can improve the power system's ability to move within the pipeline.

[0114] Fourthly, the buffer air supply component 5 may also include a fourth partition 54 and multiple second support bars 55.

[0115] like Figure 1 As shown, the fourth partition 54 is parallel to the third partition 511. The fourth partition 54 is located on the side of the plurality of first buffer air supply tanks 52 and second buffer air supply tanks 53 away from the second partition 12, and is connected to the plurality of first buffer air supply tanks 52 and second buffer air supply tanks 53. A plurality of second support bars 55 are located between the third partition 511 and the fourth partition 54, and the two ends of each second support bar 55 are connected to the third partition 511 and the fourth partition 54 respectively.

[0116] This increases the stability of the connection between the multiple first buffer air supply tanks 52 and the second buffer air supply tanks 53 and the third partition 511.

[0117] Fifthly, the power system may also include a tank mounting bracket.

[0118] like Figure 1 As shown, the can holder 8 has an M-shaped structure, and the two arc-shaped protrusions of the can holder 8 are the same as the outer diameter of the first can 31 and the second can 41. The can holder 8 can be connected to the side of the first support bar 15 located in the middle away from the first support plate 13. The can holder 8 and the first support bar 15 can be rotatably connected by bolts. When it is necessary for the can holder 8 to prevent the first can 31 and the second can 41 from rolling off, the can holder 8 is perpendicular to the first support bar 15. When it is necessary to disassemble the first can 31 and the second can 41, the can holder 8 is parallel to the first support bar 15.

[0119] In this way, when the power system travels in the pipeline, the tank holder 8 and the first support bar 15 can be set to be perpendicular, and the tank holder 8 can prevent the first tank 31 and the second tank 41 from rolling off between two adjacent first support bars 15.

[0120] The above-mentioned optional structures for the power system can be used individually or in combination.

[0121] The power system of this application features a first air storage assembly 3 for storing high-pressure air, a second air storage assembly 4 for storing shielding gas for gas-shielded welding, an outlet of the first buffer air supply tank 52 connected to the inlet of the pneumatic components of the inner welding machine via a pipeline, an outlet of the second buffer air supply tank 53 connected to the inlet of the welding torch of the inner welding machine via a pipeline, and a power supply unit 6 comprising two sets of batteries 61, one set of batteries 61 electrically connected to multiple sets of electric drive wheels 2, and the other set of batteries electrically connected to the welding torch of the inner welding machine. The power system can operate independently powered by the batteries 61, thus requiring only a shorter delivery pipe and cable to supply shielding gas, compressed air, and electrical energy to the inner welding machine, thereby reducing the safety hazards associated with pipeline welding.

[0122] The above description is merely an optional embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A power system for an internal welding machine, characterized in that, The power system includes a frame (1), multiple sets of electric drive wheels (2), a first gas storage assembly (3), a second gas storage assembly (4), a buffer gas supply assembly (5), and a power supply unit (6). The frame (1) includes a first partition (11), a second partition (12), a first support plate (13), a second support plate (14), and multiple first support bars (15); the first partition (11) and the second partition (12) are parallel, the first support plate (13) and the second support plate (14) are parallel and perpendicular to the first partition (11), the two ends of the first support plate (13) and the second support plate (14) are respectively connected to the first partition (11) and the second partition, the multiple first support bars (15) are all parallel to the first support plate (13), and the two ends of the multiple first support bars (15) are respectively connected to the first partition (11) and the second partition; The multiple sets of electric drive wheels (2) include a first front electric drive wheel (21), a second front electric drive wheel (22), a first rear electric drive wheel (23), and a second rear electric drive wheel (24); the first front electric drive wheel (21) and the second front electric drive wheel (22) are located on the side of the first partition (11) away from the second partition (12) and are connected to the first partition (11); the first rear electric drive wheel (23) and the second rear electric drive wheel (24) are located on the side of the second partition (12) away from the first partition (11) and are connected to the second partition (12); the first front electric drive wheel (21 ... The second front electric drive wheel (22) is symmetrical about the first plane, and the first rear electric drive wheel (23) and the second rear electric drive wheel (24) are symmetrical about the first plane. The first plane is a plane that passes through the vertical axis of symmetry of the first partition (11) and is perpendicular to the first support plate (13). The angle between the perpendicular line from the first front electric drive wheel (21) to the axis of the first partition (11) and the perpendicular line from the second front electric drive wheel (22) to the axis is 90°, and the angle between the perpendicular line from the first rear electric drive wheel (23) to the axis and the perpendicular line from the second rear electric drive wheel (24) to the axis is 90°. The first gas storage assembly (3) includes a first tank (31) and a first pressure reducer (32); the first tank (31) is located between two adjacent first support bars (15) and is connected to the two first support bars (15); the air inlet of the first pressure reducer (32) is connected to the first tank opening of the first tank (31); the first gas storage assembly (3) is used to store high-pressure air. The second gas storage assembly (4) includes a second tank (41) and a second pressure reducer (42); the second tank (41) is located between two adjacent first support bars (15) and is connected to the two first support bars (15); the inlet end of the second pressure reducer (42) is connected to the second tank opening of the second tank (41); the second gas storage assembly (4) is used to store the protective gas for gas shielded welding. The buffer air supply assembly (5) includes a fixing frame (51), a plurality of first buffer air supply tanks (52) and a second buffer air supply tank (53). The fixing frame (51) includes a third partition (511) and a plurality of fixing plates (512). The third partition (511) is located on the side of the second partition (12) away from the first partition (11) and is parallel to the second partition (12). The plurality of fixing plates (512) are located between the third partition (511) and the second partition (12), and the two ends of each fixing plate (512) are respectively connected to the second partition (12) and the third partition (511). The plurality of first buffer air supply tanks... Both the first buffer air supply tank (52) and the second buffer air supply tank (53) are located on the side of the third partition (511) away from the second partition (12) and are connected to the third partition (511). The air inlet of the plurality of first buffer air supply tanks (52) is connected to the air outlet of the first pressure reducer (32) through a pipeline. The air outlet of the plurality of first buffer air supply tanks (52) is connected to the air inlet of the pneumatic component of the inner welding machine through a pipeline. The air inlet of the second buffer air supply tank (53) is connected to the air outlet of the second pressure reducer (42) through a pipeline. The air outlet of the second buffer air supply tank (53) is connected to the air inlet of the welding gun of the inner welding machine through a pipeline. The power supply unit (6) includes two sets of batteries (61); the two sets of batteries (61) are located on the side of the first support plate (13) or the second support plate (14) near the first support bar (15) and are connected to the first support plate (13) or the second support plate (14), one set of batteries (61) is electrically connected to the multiple sets of electric drive wheels (2), and the other set of batteries (61) is electrically connected to the welding gun of the internal welding machine; The frame (1) also includes an elastic telescopic member (19) and a support wheel (110). The elastic telescopic member (19) is located between the second partition (12) and the third partition (511) and is connected to the second partition (12). The telescopic end of the elastic telescopic member (19) is connected to the support wheel (110). The support wheel (110) extends out of the fixed frame (51) and contacts the upper wall of the pipe. The elastic telescopic member (19) is in a compressed state.

2. The power system according to claim 1, characterized in that, The frame (1) further includes a third support plate (16) and a plurality of arc-shaped frames (17). The third support plate (16) is located on the side of the first partition (11) away from the second partition (12) and is perpendicular to the first partition (11). One end of the third support plate (16) is connected to the first partition (11). The plurality of arc-shaped frames (17) are located on the side of the first partition (11) away from the second partition (12) and on the side of the third support plate (16) away from the electric drive wheel (2). Both ends of each arc-shaped frame (17) are connected to the first partition (11) and the third support plate (16) respectively.

3. The power system according to claim 2, characterized in that, The frame (1) also includes a plurality of air inlets (18), which are all parallel to the third support plate (16), and each air inlet (18) is connected to the side wall of the arc frame (17).

4. The power system according to claim 2, characterized in that, The power system also includes a cable loop (7), which is connected to the other end of the third support plate (16) and is used to fasten the hook of the inner welding machine.

5. The power system according to claim 1, characterized in that, The first partition (11) has a regular octagonal structure.

6. The power system according to claim 1, characterized in that, The buffer air supply assembly (5) further includes a fourth partition (54) and multiple second support bars (55). The fourth partition (54) is parallel to the third partition (511). The fourth partition (54) is located on the side of the multiple first buffer air supply tanks (52) and the second buffer air supply tanks (53) away from the second partition (12), and is connected to the multiple first buffer air supply tanks (52) and the second buffer air supply tanks (53). The multiple second support bars (55) are located between the third partition (511) and the fourth partition (54), and the two ends of each second support bar (55) are connected to the third partition (511) and the fourth partition (54) respectively.

7. The power system according to claim 1, characterized in that, The power supply unit (6) includes five batteries (61), one of which is electrically connected to the multiple sets of electric drive wheels (2), and the other four batteries (61) are electrically connected to the welding gun of the internal welding machine.

8. The power system according to any one of claims 1 to 7, characterized in that, The power system also includes a tank holder (8), which is located on the side of the first support bar (15) away from the first support plate (13) and is connected to the first support bar (15). The tank holder (8) is used to limit the first tank (31) and the second tank (41).

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