Code scanning device for liquefied gas storage tank detection

Abstract

The utility model provides a code scanning device for liquefied gas storage tank detection, which comprises a rack and a conveying assembly, the rack is also provided with a first mounting rack and a second mounting rack, the first mounting rack is provided with a movable frame and a first driving assembly, the movable frame is located right above the conveying assembly, and the first driving assembly drives the movable frame to be close to or far away from the conveying assembly. The movable frame is provided with a first check block, the first mounting frame is further provided with a first code scanning gun, the first code scanning gun is located above the first check block and faces the right lower portion, the second mounting frame is provided with two second code scanning guns, and the two second code scanning guns face the lower portion of the movable frame. The second mounting frame is further provided with an electric control box. The first driving assembly, the first code scanning gun and the second code scanning gun are electrically connected with the electric control box. According to the utility model, the technical problems of high labor intensity and low detection efficiency of manual detection of the two-dimensional code label of the liquefied gas storage tank are solved, and the technical effects of improving the detection efficiency and reducing the labor intensity of operators are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of liquefied gas tank production, in particular to a code scanning device for detecting liquefied gas tanks. Background Art

[0002] In order to promote the information-based traceability management of liquefied gas tank filling, the legal liquefied gas tanks need to be equipped with QR code electronic tags on their shields and valves, and laser codes will also be printed on the shields of the liquefied gas tanks. The units that fill the liquefied gas tanks can trace the source of the liquefied gas tanks by scanning the QR code or laser code on the liquefied gas tanks. Therefore, after the liquefied gas tanks are produced, they need to be scanned and tested on the QR code and laser code on the same liquefied gas tank before leaving the factory to ensure that the information entered on the QR code and laser code on the same liquefied gas tank is consistent.

[0003] At present, the barcode scanning inspection of liquefied gas tanks before leaving the factory is usually performed manually by using a handheld barcode scanning gun to scan the QR code and laser code on the liquefied gas tank in turn. The operation steps are cumbersome and the operator needs to move the barcode scanning gun frequently, which has high labor intensity and low detection efficiency. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a code scanning device for detecting liquefied gas tanks, which solves the problems of high labor intensity and low detection efficiency in the prior art for manually detecting two-dimensional codes and laser codes of liquefied gas tanks.

[0005] According to an embodiment of the utility model, a code scanning device for detecting a liquefied gas tank comprises a frame and a conveying assembly arranged on the frame, a first mounting frame and a second mounting frame are also arranged on the frame, the first mounting frame is provided with a movable frame which can be lifted and lowered in a vertical direction and a first driving assembly which is transmission-connected to the movable frame, the movable frame is located directly above the conveying assembly and the first driving assembly drives the movable frame to approach or move away from the conveying assembly, a first stopper is provided on the movable frame, the first stopper is located on one of the two opposite sides of the movable frame along the conveying direction of the conveying assembly, a first code scanning gun is also provided on the first mounting frame, the first code scanning gun is located above the first stopper and faces directly downward, the second mounting frame is located on one side of the first mounting frame and two second code scanning guns are provided on the second mounting frame, the two second code scanning guns are respectively located on the opposite sides of the movable frame along the conveying direction of the conveying assembly and respectively face downward of the movable frame, an electric control box is also provided on the second mounting frame and the first driving assembly, the first code scanning gun and the second code scanning gun are respectively electrically connected to the electric control box.

[0006] Furthermore, the conveying assembly includes a plurality of conveying rollers arranged in parallel, and the conveying rollers are rotatably arranged on the frame respectively.

[0007] Furthermore, the first driving assembly includes a first cylinder and a first telescopic rod arranged at the output end of the first cylinder, the telescopic direction of the first telescopic rod is consistent with the vertical direction and one end of the first telescopic rod away from the first cylinder is fixedly connected to the movable frame.

[0008] Furthermore, two guide rails are arranged at intervals on the first mounting frame, the length directions of the two guide rails are respectively vertical directions and the two guide rails are respectively located at opposite ends of the movable frame, and sliders corresponding to the guide rails are respectively arranged at both ends of the movable frame.

[0009] Furthermore, the movable frame is also provided with a rotatable movable rod and a second driving component transmission-connected to the movable rod, the movable rod and the first stopper are respectively located on opposite sides of the movable frame along the conveying direction of the conveying component, a second stopper is provided at one end of the movable rod away from the movable frame and the second driving component drives the movable rod to rotate so that the second stopper approaches or moves away from the conveying component, and the second driving component is electrically connected to the electrical control box.

[0010] Furthermore, the second driving assembly includes a second cylinder and a second telescopic rod arranged at the output end of the second cylinder, the second cylinder is rotatably connected to the movable frame away from the second telescopic rod, and the second telescopic rod is rotatably connected to the movable rod at one end away from the second cylinder.

[0011] Furthermore, the first mounting frame is provided with a first bracket, the first bracket is provided with a first oblong hole and a second oblong hole which are perpendicular to each other, the first mounting frame is provided with a first threaded rod which matches with the first oblong hole, and the first threaded rod is provided with a first locking nut which presses the first bracket onto the first mounting frame, the first barcode scanner is provided with a second threaded rod which matches with the second oblong hole, and the second threaded rod is provided with a second locking nut which presses the first bracket onto the first barcode scanner.

[0012] Furthermore, the second mounting frame is provided with a second bracket, the second bracket is provided with a third oblong hole and a fourth oblong hole parallel to each other, the second mounting frame is provided with a third threaded rod matching with the third oblong hole, and the third threaded rod is provided with a third locking nut for pressing the second bracket onto the second mounting frame, and the second barcode scanner is provided with a fourth threaded rod matching with the fourth oblong hole, and the fourth threaded rod is provided with a fourth locking nut for pressing the second bracket onto the second barcode scanner.

[0013] Furthermore, a photoelectric switch is provided on the frame, and the photoelectric switch is arranged close to the first mounting frame and is electrically connected to the electric control box.

[0014] Furthermore, a display screen is provided on the second mounting frame, and the display screen is electrically connected to the electric control box.

[0015] Compared with the prior art, the utility model has the following beneficial effects: by adopting a conveying assembly arranged on a frame to convey the liquefied gas tank to be inspected, when the liquefied gas tank moves to the bottom of the first mounting frame, the first driving assembly drives the movable frame to descend so that the first block abuts against the shield of the liquefied gas tank and blocks the liquefied gas tank from continuing to move, at this time, the first barcode scanner arranged on the first mounting frame scans the two-dimensional code on the valve of the liquefied gas tank from above, and at the same time, the two second barcode scanners arranged on the second mounting frame respectively scan the two-dimensional code and the laser code on the shield of the liquefied gas tank, thereby reading the information entered in the two-dimensional code and the laser code on the same liquefied gas tank and inspecting the liquefied gas tank, after the reading is completed and the liquefied gas tank passes the inspection, the first driving assembly drives the movable frame to rise so that the first block is separated from the liquefied gas tank, and at this time, the liquefied gas tank that has been inspected can continue to move along the conveying assembly, which solves the technical problems of high labor intensity and low detection efficiency of manual detection of the two-dimensional code and laser code of the liquefied gas tank, and produces the technical effects of improving detection efficiency and reducing the labor intensity of operators, and has a high degree of automation and simple and convenient operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of a barcode scanning device for detecting a liquefied gas tank according to an embodiment of the utility model;

[0017] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0018] Figure 3 This is a schematic structural diagram of a barcode scanning device for detecting a liquefied gas tank according to an embodiment of the utility model from another perspective;

[0019] Figure 4 for Figure 3 The enlarged view of point B in the middle;

[0020] Figure 5 This is a schematic structural diagram of a second stopper in a barcode scanning device for detecting a liquefied gas tank according to an embodiment of the utility model when the second stopper is close to a conveying assembly.

[0021] In the above drawings: 1. frame; 11. conveying assembly; 12. conveying roller; 13. photoelectric switch; 2. first mounting frame; 21. movable frame; 22. first stopper; 23. guide rail; 24. slider; 25. movable rod; 26. second stopper; 27. first threaded rod; 28. first locking nut; 3. second mounting frame; 31. electric control box; 32. third threaded rod; 33. third locking nut; 34. display screen; 4. first driving assembly; 41. first cylinder; 42. first telescopic rod; 5. first barcode scanner; 51. second threaded rod; 52. second locking nut; 6. second barcode scanner; 61. fourth locking nut; 7. second driving assembly; 71. second cylinder; 72. second telescopic rod; 8. first bracket; 81. first oblong hole; 82. second oblong hole; 9. second bracket; 91. third oblong hole; 92. fourth oblong hole. DETAILED DESCRIPTION

[0022] The technical solution of the present utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0023] like Figures 1 to 5 As shown, an embodiment of the utility model proposes a code scanning device for detecting liquefied gas tanks, which is used to scan the two-dimensional code electronic tags installed on the protective cover and valve of the same liquefied gas tank and the laser code on the protective cover before the liquefied gas tank leaves the factory and read the corresponding two-dimensional code or the information entered by the laser code, and determine whether the information entered by the two-dimensional code and the laser code on the same liquefied gas tank is consistent so as to detect the liquefied gas tank.

[0024] Please refer to Figure 1 and Figure 3, the barcode scanning device for detecting liquefied gas tanks comprises a frame 1 and a conveying assembly 11 arranged on the frame 1, the conveying assembly 11 is used to transport the liquefied gas tank to be detected, the frame 1 is also provided with a first mounting frame 2 and a second mounting frame 3, the first mounting frame 2 is provided with a movable frame 21 which can be lifted and lowered in a vertical direction and a first driving assembly 4 which is transmission-connected to the movable frame 21, the movable frame 21 is located directly above the conveying assembly 11 and the first driving assembly 4 is used to drive the movable frame 21 to approach or move away from the conveying assembly 11, the movable frame 21 is provided with a first stopper 22, the first stopper 22 is located on one of the two opposite sides of the movable frame 21 along the conveying direction of the conveying assembly 11, and after the first driving member drives the movable frame 21 to descend to a certain height, the first stopper 22 blocks the liquefied gas tank from moving on the conveying assembly 11 and keeps the liquefied gas tank below the movable frame 21, the first mounting frame 2 is also provided with a first barcode scanning gun 5, the first barcode scanning gun 5 is located at the first stopper 2 2 and facing directly downward, when the liquefied gas tank to be detected is maintained below the movable frame 21, the first barcode scanner 5 scans the two-dimensional code on the valve of the liquefied gas tank, the second mounting frame 3 is located on one side of the first mounting frame 2 and two second barcode scanners 6 are arranged on the second mounting frame 3 at intervals, the two second barcode scanners 6 are respectively located on both sides of the movable frame 21 along the conveying direction of the conveying component 11 and respectively face the bottom of the movable frame 21, the two second barcode scanners 6 are respectively used to scan the two-dimensional code and laser code on the shield of the liquefied gas tank, and the second mounting frame 3 is also provided with an electric control box 31 electrically connected to the first driving component 4, the first barcode scanner 5 and the second barcode scanner 6 respectively, the electric control box 31 is provided with a processor and the processor has a built-in program for comparing the information read by the first barcode scanner 5 and the second barcode scanner 6, and the information read by the first barcode scanner 5 and the second barcode scanner 6 can be compared by the processor to determine whether the liquefied gas tank being detected is qualified.

[0025] Specifically, the steps for the liquefied gas tank detection scanning device provided in this embodiment to detect the liquefied gas tank are as follows: when the liquefied gas tank to be detected is moved from the conveying component 11 to the bottom of the first mounting frame 2, the first driving component 4 is started and drives the movable frame 21 to descend so that the first stopper 22 abuts against the shield of the liquefied gas tank and blocks the liquefied gas tank from continuing to move. At this time, the first scanning gun 5 is arranged to scan the two-dimensional code on the valve of the liquefied gas tank from above, and at the same time, the two second scanning guns 6 respectively scan the two-dimensional code and laser code on the shield of the liquefied gas tank, so as to read the information entered in the two-dimensional code and laser code on the same liquefied gas tank, and the processor in the electric control box 31 compares the read information. If the comparison result is that the information entered in the two-dimensional code and the laser code is consistent, the liquefied gas tank passes the inspection. At this time, the first drive component 4 drives the movable frame 21 to rise so that the first block 22 is separated from the liquefied gas tank, so that the liquefied gas tank that has been inspected can continue to move along the conveying component 11. If the comparison result is that the information entered in the two-dimensional code and the laser code is inconsistent, the first block 22 remains in a position that blocks the movement of the liquefied gas tank, and the electrical control box 31 sends a signal to the operator to remind the staff that the liquefied gas tank has not passed the inspection. After the operator processes the liquefied gas tank, he manually controls the first drive component 4 to drive the movable frame 21 to reset. At this time, the liquefied gas tank inspection code scanning device can continue to operate and inspect the next liquefied gas tank. The liquefied gas tank inspection code scanning device provided in this embodiment effectively improves the inspection efficiency and reduces the labor intensity of the operator, and has a high degree of automation and is simple and convenient to operate.

[0026] like Figure 3 As shown, in this embodiment, the conveying assembly 11 includes a plurality of conveying rollers 12 arranged in parallel, and the conveying rollers 12 are rotatably arranged on the frame 1. After the liquefied gas tank to be inspected is placed on the conveying assembly 11 and contacts the conveying rollers 12, the liquefied gas tank can be moved on the conveying assembly 11 by driving the plurality of parallel conveying rollers 12 to rotate simultaneously, so as to move the liquefied gas tank to be inspected to the bottom of the movable frame 21 for inspection and move the inspected liquefied gas tank to a designated position.

[0027] Please combine Figure 1 and Figure 5In this embodiment, the first driving assembly 4 includes a first cylinder 41 and a first telescopic rod 42 arranged at the output end of the first cylinder 41. The telescopic direction of the first telescopic rod 42 is consistent with the vertical direction, and the end of the first telescopic rod 42 away from the first cylinder 41 is fixedly connected to the movable frame 21. The first cylinder 41 drives the first telescopic rod 42 to extend or retract into the first cylinder 41, so as to drive the movable frame 21 to move on the first mounting frame 2. When the first telescopic rod 42 extends out of the first cylinder 41, the movable frame 21 descends in the vertical direction and blocks the liquefied gas tank to be inspected from moving on the conveying assembly 11 through the first stopper 22. When the second telescopic rod 72 retracts into the first cylinder 41, it drives the movable frame 21 to rise in the vertical direction and makes the first stopper 22 away from the liquefied gas tank that has been inspected, so that the liquefied gas tank can continue to move under the drive of the conveying assembly 11.

[0028] In detail, two guide rails 23 are arranged on the first mounting frame 2 at intervals, the length directions of the two guide rails 23 are respectively in the vertical direction and the two guide rails 23 are respectively located at opposite ends of the movable frame 21, and sliders 24 are respectively arranged at both ends of the movable frame 21, which are matched with the guide rails 23 in a one-to-one manner. The moving direction of the movable frame 21 on the first mounting frame 2 is limited by the cooperation between the guide rails 23 and the sliders 24, so as to prevent the movable frame 21 from unexpectedly deviating when moving, and ensure that the first stopper 22 moves to the preset position and blocks the corresponding liquefied gas tank from moving, so as to improve the reliability of the barcode scanning device for detecting the liquefied gas tank.

[0029] Please refer to Figure 3 and Figure 5The movable frame 21 is also provided with a rotatable movable rod 25 and a second driving component 7 drivingly connected to the movable rod 25. The movable rod 25 and the first stopper 22 are respectively located on opposite sides of the movable frame 21 along the conveying direction of the conveying component 11. A second stopper 26 is provided at one end of the movable rod 25 away from the movable frame 21, and the second driving component 7 drives the movable rod 25 to rotate so that the second stopper 26 approaches or moves away from the conveying component 11. The second driving component 7 is electrically connected to the electric control box 31. When the movable rod 25 is driven by the second driving component 7 to rotate to a vertical state, the second stopper 26 approaches the conveying component 11 and abuts against the tank body of the liquefied gas tank to be inspected, so as to limit the liquefied gas tank from different positions in the vertical direction through the first stopper 22 and the second stopper 26 to prevent the liquefied gas tank from tipping over during the inspection process. After the inspection is completed, the second driving component 7 drives the movable rod 25 to rotate to a horizontal state so that the second stopper 26 is away from the conveying component 11. At this time, the liquefied gas tank that has completed the inspection can pass under the movable frame 21, ensuring that the liquefied gas tank moves normally on the barcode scanning device for liquefied gas tank inspection.

[0030] Specifically, the second driving assembly 7 includes a second cylinder 71 and a second telescopic rod 72 arranged at the output end of the second cylinder 71. The second cylinder 71 is rotatably connected to the movable frame 21 at a point away from the second telescopic rod 72, and the second telescopic rod 72 is rotatably connected to the movable frame 21 at one end away from the second cylinder 71. The movable rod 25 can be driven to rotate on the movable frame 21 by the second cylinder 71 to extend or retract the second telescopic rod 72 into the second cylinder 71. When the second telescopic rod 72 extends out of the second cylinder 71, the movable rod 25 rotates from a horizontal state to a vertical state. At this time, the second stopper 26 approaches the conveying assembly 11. When the second telescopic rod 72 retracts into the second cylinder 71, the movable rod 25 rotates from a vertical state to a horizontal state and moves the second stopper 26 away from the conveying assembly 11, so as to adjust the position of the second stopper 26.

[0031] like Figure 3 and Figure 4As shown, the first mounting frame 2 is provided with a first bracket 8, the first bracket 8 is provided with a first oblong hole 81 and a second oblong hole 82 which are perpendicular to each other, the first mounting frame 2 is provided with a first threaded rod 27 which matches with the first oblong hole 81, and the first threaded rod 27 is provided with a first locking nut 28 which presses the first bracket 8 onto the first mounting frame 2, the first barcode scanner 5 is provided with a second threaded rod 51 which matches with the second oblong hole 82, and the second threaded rod 51 is provided with a second locking nut 52 which presses the first bracket 8 onto the first barcode scanner 5. After the first threaded rod 27 is inserted into the first oblong hole 81, the position of the first bracket 8 on the first mounting frame 2 can be adjusted by rotating and moving the first bracket 8, and after the first bracket 8 is adjusted into place, the first locking nut 28 is installed on the first threaded rod 27 to lock the position of the first bracket 8. When the first barcode scanner 5 is installed on the first bracket 8, the second threaded rod 51 is first inserted into the second oblong hole 82, and the first barcode scanner 5 is rotated or moved to adjust the first barcode scanner 5 into place, and then the second locking nut 52 is installed on the second threaded rod 51 and the second locking nut 52 is tightened, so that the first barcode scanner 5 can be fixed on the first bracket 8 so that the position of the first barcode scanner 5 on the first mounting frame 2 remains stable, and the installation position of the first barcode scanner 5 is adjusted by moving or rotating the first bracket 8 and the first barcode scanner 5, ensuring that the first barcode scanner 5 can scan the two-dimensional code on the valve of the liquefied gas tank after being installed on the first mounting frame 2.

[0032] Please combine Figure 1 and Figure 2The second mounting frame 3 is provided with a second bracket 9, and the second bracket 9 is provided with a third oblong hole 91 and a fourth oblong hole 92 which are parallel to each other. The second mounting frame 3 is provided with a third threaded rod 32 which matches with the third oblong hole 91, and the third threaded rod 32 is provided with a third locking nut 33 which presses the second bracket 9 onto the second mounting frame 3. The second barcode scanner 6 is provided with a fourth threaded rod which matches with the fourth oblong hole 92, and the fourth threaded rod is provided with a fourth locking nut 61 which presses the second bracket 9 onto the second barcode scanner 6. After the third threaded rod 32 is inserted into the third oblong hole 91, the position of the third bracket on the second mounting bracket 3 can be adjusted by rotating and moving the third bracket, and after the second bracket 9 is adjusted into place, the third locking nut 33 is installed on the third threaded rod 32 to lock the position of the second bracket 9. When the second barcode scanner 6 is installed on the second bracket 9, the fourth threaded rod is first inserted into the fourth oblong hole 92, and the second barcode scanner 6 is rotated or moved to adjust the second barcode scanner 6 into place. Then, the fourth locking nut 61 is installed on the fourth threaded rod and the fourth locking nut 61 is tightened, so that the second barcode scanner 6 can be fixed on the second bracket 9 so that the position of the second barcode scanner 6 on the second mounting bracket 3 remains stable, and the installation position of the second barcode scanner 6 is adjusted by moving or rotating the second bracket 9 and the second barcode scanner 6 to ensure that the second barcode scanner 6 can scan the QR code and laser code on the shield of the liquefied gas tank after being installed on the movable frame 21.

[0033] like Figure 1 and Figure 5 As shown, the frame 1 is also provided with a photoelectric switch 13, which is arranged near the first mounting frame 2 and electrically connected to the electric control box 31. The photoelectric switch 13 is used to sense the position of the liquefied gas tank to be detected. When the liquefied gas tank to be detected approaches the first mounting frame 2 under the action of the conveying component 11, the photoelectric switch 13 senses that the liquefied gas tank is approaching and sends a signal to the electric control box 31. After receiving the signal sent by the photoelectric switch 13, the electric control box 31 controls the first driving component 4 and the second driving component 7 to move respectively, so that the first stopper 22 and the second stopper 26 are respectively moved to the position of blocking the movement of the liquefied gas tank, ensuring that the first stopper 22 and the second stopper 26 are in stable contact with the liquefied gas tank.

[0034] Please refer to Figure 1The second mounting frame 3 is also provided with a display screen 34, and the display screen 34 is electrically connected to the electric control box 31. The display screen 34 is used to display the information read by the first barcode scanning gun 5 and the second barcode scanning gun 6 and the detection result of the currently detected liquefied gas tank, so that the operator can intuitively understand the operating status of the barcode scanning device for liquefied gas tank detection, which is convenient for the use of the barcode scanning device for liquefied gas tank detection.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A barcode scanning device for detecting a liquefied gas tank, characterized in that: The machine comprises a frame and a conveying assembly arranged on the frame, a first mounting frame and a second mounting frame are also arranged on the frame, the first mounting frame is provided with a movable frame which can be lifted and lowered in a vertical direction and a first driving assembly which is transmission-connected to the movable frame, the movable frame is located directly above the conveying assembly and the first driving assembly drives the movable frame to approach or move away from the conveying assembly, a first stopper is provided on the movable frame, the first stopper is located on one of the two opposite sides of the movable frame along the conveying direction of the conveying assembly, a first barcode scanning gun is also provided on the first mounting frame, the first barcode scanning gun is located above the first stopper and faces directly downward, the second mounting frame is located on one side of the first mounting frame and two second barcode scanning guns are provided on the second mounting frame, the two second barcode scanning guns are respectively located on the opposite sides of the movable frame along the conveying direction of the conveying assembly and respectively face downward of the movable frame, an electric control box is also provided on the second mounting frame and the first driving assembly, the first barcode scanning gun and the second barcode scanning gun are respectively electrically connected to the electric control box.

2. A barcode scanning device for detecting a liquefied gas tank as claimed in claim 1, characterized in that: The conveying assembly comprises a plurality of conveying rollers arranged in parallel, and the conveying rollers are rotatably arranged on the frame respectively.

3. A barcode scanning device for detecting a liquefied gas tank as claimed in claim 1, characterized in that: The first driving assembly includes a first cylinder and a first telescopic rod arranged at an output end of the first cylinder, the telescopic direction of the first telescopic rod is consistent with the vertical direction, and one end of the first telescopic rod away from the first cylinder is fixedly connected to the movable frame.

4. A barcode scanning device for detecting a liquefied gas tank as claimed in claim 1, characterized in that: Two guide rails are arranged on the first mounting frame at intervals, the length directions of the two guide rails are respectively vertical directions and the two guide rails are respectively located at opposite ends of the movable frame, and sliders corresponding to the guide rails are respectively arranged at both ends of the movable frame.

5. A barcode scanning device for detecting a liquefied gas tank as claimed in claim 1, characterized in that: The movable frame is also provided with a rotatable movable rod and a second driving component that is transmission-connected to the movable rod. The movable rod and the first stopper are respectively located on opposite sides of the movable frame along the conveying direction of the conveying component. A second stopper is provided at one end of the movable rod away from the movable frame, and the second driving component drives the movable rod to rotate so that the second stopper approaches or moves away from the conveying component. The second driving component is electrically connected to the electric control box.

6. A barcode scanning device for detecting a liquefied gas tank as claimed in claim 5, characterized in that: The second driving assembly includes a second cylinder and a second telescopic rod arranged at the output end of the second cylinder, the second cylinder is rotatably connected to the movable frame at a point away from the second telescopic rod, and one end of the second telescopic rod away from the second cylinder is rotatably connected to the movable rod.

7. A barcode scanning device for detecting a liquefied gas tank as claimed in claim 1, characterized in that: The first mounting frame is provided with a first bracket, and the first bracket is provided with a first oblong hole and a second oblong hole which are perpendicular to each other. The first mounting frame is provided with a first threaded rod which matches with the first oblong hole, and the first threaded rod is provided with a first locking nut which presses the first bracket onto the first mounting frame. The first barcode scanner is provided with a second threaded rod which matches with the second oblong hole, and the second threaded rod is provided with a second locking nut which presses the first bracket onto the first barcode scanner.

8. A barcode scanning device for detecting a liquefied gas tank as claimed in claim 1, characterized in that: The second mounting frame is provided with a second bracket, and the second bracket is provided with a third oblong hole and a fourth oblong hole parallel to each other, the second mounting frame is provided with a third threaded rod matching with the third oblong hole, and the third threaded rod is provided with a third locking nut for pressing the second bracket onto the second mounting frame, and the second barcode scanner is provided with a fourth threaded rod matching with the fourth oblong hole, and the fourth threaded rod is provided with a fourth locking nut for pressing the second bracket onto the second barcode scanner.

9. A barcode scanning device for detecting a liquefied gas tank as claimed in claim 1, characterized in that: The frame is also provided with a photoelectric switch, which is arranged close to the first mounting frame and is electrically connected to the electric control box.

10. A barcode scanning device for detecting a liquefied gas tank as claimed in claim 1, characterized in that: The second mounting frame is also provided with a display screen, and the display screen is electrically connected to the electric control box.

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