Positioning mechanism for gas cylinder liner

Abstract

The application provides a positioning mechanism for a gas cylinder liner, which comprises a bracket and a hook adjusting assembly. The bracket is used for carrying the gas cylinder liner. The hook adjusting assembly is arranged at one end of the bracket and comprises a hook, an axial adjusting unit and a radial adjusting unit. The axial adjusting unit drives the hook to move in a first direction, which is parallel to the axial direction of the gas cylinder liner. The radial adjusting unit drives the hook to move in a second direction, which is perpendicular to the bearing end surface of the bracket, and the first direction is parallel to the bearing end surface of the bracket. The positioning mechanism for the gas cylinder liner can be used before and after heat treatment of the gas cylinder liner and in some cases where the gas cylinder liner needs to be positioned. The hook adjusting assembly is arranged, so that the positioning mechanism can accurately position gas cylinder liners of different sizes, avoiding the difficulty of manual operation and the safety hazards, and greatly improving the work efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heat treatment, in particular to a positioning mechanism for gas cylinder liner. BACKGROUND

[0002] In the prior art, when the hydrogen cylinder liner, especially the large cylinder liner, is subjected to heat treatment, the cylinder liner needs to be positioned from a horizontal state to a vertical state before heat treatment, and after heat treatment, the cylinder liner in the vertical state needs to be positioned to the horizontal state, and the cylinder liner needs to be safely fixed before entering the next procedure. Due to the difference in the size of the cylinder liner, the positions of the cylinder liner of different sizes in the horizontal state are different in the axial and radial directions. Moreover, the cylinder liner is generally too long, with a length of 6.5 meters, and the weight of the cylinder liner can reach one ton, so it is difficult to position the cylinder liner with a length of about 6.5 meters and a weight of about one ton. SUMMARY

[0003] The purpose of the present application is to provide a positioning mechanism for a gas cylinder liner to solve the above problems, and the specific application content is as follows:

[0004] A positioning mechanism for a gas cylinder liner, which is improved in that it comprises a bracket and a hook adjusting assembly,

[0005] The bracket is used to carry the gas cylinder liner;

[0006] The hook adjusting assembly is arranged at one end of the bracket and comprises a hook, an axial adjusting unit and a radial adjusting unit;

[0007] The axial adjusting unit drives the hook to move in a first direction, and the first direction is parallel to the axial direction of the gas cylinder liner;

[0008] The radial adjusting unit drives the hook to move in a second direction, and the second direction is perpendicular to the carrying end face of the bracket, while the first direction is parallel to the carrying end face of the bracket.

[0009] Further, in the above-mentioned positioning mechanism for a gas cylinder liner, the axial adjusting unit comprises a first track and a first electric push cylinder, and the first track is installed on the bracket in the first direction;

[0010] The radial adjusting unit is arranged on the first track and can move in the first direction and the second direction, respectively;

[0011] The hook is arranged on the radial adjusting unit and is used to cooperate with the pin shaft of the gas cylinder liner;

[0012] The first electric push cylinder is used to drive the radial adjusting unit to move along the first track.

[0013] Further, in the positioning mechanism for gas cylinder liner, the radial adjusting unit comprises a second track and a second electric push cylinder, the second track is arranged along the second direction and is slidably connected with the first track at the lower end;

[0014] The fixed end of the hook is slidably connected with the second track;

[0015] The second electric push cylinder is used to drive the hook to move along the second track.

[0016] Further, in the positioning mechanism for gas cylinder liner, a contact sensor is arranged on the hook and a position sensor is arranged on the positioning mechanism,

[0017] The contact sensor is used to detect whether the hook hooks the pin shaft or not;

[0018] The position sensor is used to detect whether the pin shaft reaches the specified position or not.

[0019] Further, in the positioning mechanism for gas cylinder liner, the other end of the hook is a hooking end, and a groove is arranged on the side of the hooking end which is matched with the pin shaft; a buffer pad is arranged in the groove.

[0020] Further, in the positioning mechanism for gas cylinder liner, two first tracks are arranged, and each of the two first tracks is installed on the bracket along the first direction.

[0021] Further, in the positioning mechanism for gas cylinder liner, two second tracks are arranged, and each of the two second tracks is installed on the first track along the second direction.

[0022] Further, in the positioning mechanism for gas cylinder liner, size marks are arranged on the first track and the second track.

[0023] Further, in the positioning mechanism for gas cylinder liner, a holding part is further arranged on the bracket,

[0024] The holding part is not less than two, and each of the holding parts comprises a holding arm and an adjusting cylinder,

[0025] The lower end of the holding arm is rotatably installed on the bracket through a mounting seat, and the holding arm is used to radially fix the gas cylinder liner;

[0026] The adjusting cylinder is movably connected with the holding arm and is used to drive the holding arm to move.

[0027] Further, in the positioning mechanism for gas cylinder liner, the bracket is further provided with a support part, the support part is provided with no less than two, each of the support parts comprises two vertical columns, a support block and two rollers,

[0028] The support block is arranged on the central axis of the bracket, the two vertical columns are arranged on the two sides of the support block respectively, and the vertical columns are higher than the support block;

[0029] Each of the vertical columns and the support block is provided with the roller, and the outer side wall of the gas cylinder liner is in direct contact with the two rollers;

[0030] The two vertical columns, the two rollers and the support block are connected to form the M-shaped support part.

[0031] Compared with the prior art, the positioning mechanism for gas cylinder liner has the following beneficial effects:

[0032] The positioning mechanism for gas cylinder liner can be used before and after heat treatment of the gas cylinder liner, and in some cases where the gas cylinder liner needs to be positioned. By setting the hook adjusting assembly, the positioning mechanism can accurately position the gas cylinder liner of different sizes, eliminating the difficulty of manual operation and the safety hazards, and greatly improving the work efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0033] The drawings accompanying the specification of this application form a part thereof, serve to provide further understanding of the application, and together with the description of the exemplary embodiments of the application, serve to explain the application, and do not constitute an improper limitation on the application. Among them:

[0034] Figure 1 The use state diagram of the positioning mechanism for gas cylinder liner provided by the application;

[0035] Figure 2 The structure schematic diagram of the hook adjusting assembly of the positioning mechanism for gas cylinder liner provided by the application.

[0036] Explanation of reference signs:

[0037] 1, hook adjusting assembly; 11, first track; 12, first electric push cylinder; 13, second track; 14, second electric push cylinder; 15, hook; 16, groove; 2, bracket; 3, holding part; 4, support part; 5, gas cylinder liner. DETAILED DESCRIPTION

[0038] The present application will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments. Each example is provided by way of explanation of the present application and is not intended to limit the present application. In fact, those skilled in the art will appreciate that modifications and variations to the present application can be made without departing from the scope or spirit of the present application. For example, features shown or described as part of one embodiment can be used in another embodiment to yield still a further embodiment. It is therefore intended that the present application encompass such modifications and variations as come within the scope of the appended claims and their equivalents.

[0039] In the description of the present application, the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", and the like indicate the orientation or positional relationship shown in the drawings, and are used only for the purpose of facilitating the description of the present application and do not require the present application to be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. The terms "connected", "connected", "provided" used in the present application should be interpreted broadly, for example, it can be fixedly connected or detachably connected; it can be directly connected or indirectly connected through intermediate components, and the specific meaning of the above terms can be understood by those skilled in the art according to the specific circumstances.

[0040] To solve the above problem that the gas cylinder liner 5 cannot be accurately positioned according to different sizes, the present application provides a positioning mechanism for a gas cylinder liner, which can accurately position different sizes of gas cylinder liners 5, and also eliminates the difficulties and safety hazards of manual operation, greatly improving work efficiency.

[0041] Specifically, as shown in Figure 1 is a use state diagram of the positioning mechanism for a gas cylinder liner provided by the present application. Figure 2 is a structure diagram of a hook adjusting assembly 1 of the positioning mechanism for a gas cylinder liner provided by the present application. The positioning mechanism for a gas cylinder liner includes a bracket 2 and a hook adjusting assembly 1. The bracket 2 is used to carry the gas cylinder liner 5. The initial state of the bracket 2 can be a horizontal placement state or a vertical state, which needs to be determined according to the actual application working condition. The gas cylinder liner 5 needs to be placed on the bracket 2 during use, and the above-mentioned hook adjusting assembly 1 is arranged at one end (such as the left end or the right end in Figure 1 ) of the bracket 2. The hook adjusting assembly 1 includes a hook 15, an axial adjusting unit and a radial adjusting unit.

[0042] Specifically, as shown in Figure 2As shown, the axial adjusting unit functions to move the hook 15 along a first direction, and the first direction is parallel to the axial direction of the cylinder liner 5. The radial adjusting unit functions to move the hook 15 along a second direction, and the second direction is perpendicular to the bearing end surface of the bracket 2. Meanwhile, the first direction is parallel to the bearing end surface of the bracket 2. That is, the second direction is also perpendicular to the first direction. Therefore, the cylinder liner 5 is adjusted along the first direction, that is, the cylinder liner 5 is adjusted along the axial direction of the cylinder liner 5; and the cylinder liner 5 is adjusted along the second direction, that is, the cylinder liner 5 is adjusted along a radial direction of the cylinder liner 5. After the cylinder liner 5 is adjusted along the first direction and the second direction, the positioning of the cylinder liner 5 can be realized, and the cylinder liner 5 is brought to a specified position to meet the preparation work before the cylinder liner 5 enters the next link.

[0043] Further, the axial adjusting unit includes a first track 11 and a first electric push cylinder 12. The first track 11 is installed on the bracket 2 along the first direction. Specifically, the first track 11 can be installed on the upper end of the bearing surface of the bracket 2, or the lower end, and the installation position is not limited here, as long as the radial adjusting unit connected thereto can slide along the first track 11.

[0044] Specifically, the radial adjusting unit is arranged on the first track 11 and can move along the first direction and the second direction, respectively. The hook 15 is arranged on the radial adjusting unit and is used to cooperate with the pin shaft of the cylinder liner 5. The pin shaft of the cylinder liner 5 is arranged at the open end of the cylinder liner 5 and is generally arranged along the radial direction of the cylinder liner 5. That is, the radial adjusting unit can adjust the position of the hook 15 along the first direction by moving along the first direction on the first track 11, so that the hook 15 is closer to the pin shaft along the first direction. Then, the radial adjusting unit moves along the second direction until the hook 15 can hook the pin shaft in the second direction. The pin shaft is hooked on the hook 15 by moving the radial adjusting unit along the second direction, and the cylinder liner 5 is hooked at a specified position, that is, the fixing of the cylinder liner 5 is completed. It should be noted that the sequence of the above and below descriptions of the adjustment of the hook 15 along the first direction or the second direction is not limited, and the specific sequence of adjustment along which direction first can be determined according to the actual working conditions.

[0045] Further, in this embodiment, the first electric push cylinder 12 is used to drive the radial adjusting unit to move along the first track 11. The movement of the radial adjusting unit along the second direction can be sliding or clamping. The specific selection can be made according to actual needs. For example, when the movement of the radial adjusting unit along the second direction is also sliding, i.e., the radial adjusting unit moves along the first direction and the second direction both in sliding, the connecting slider (not shown in the figure) can be arranged to connect the radial adjusting unit and the first track 11, and the connecting slider can have the structure to realize the sliding and locking in the first track 11, and also have the structure to realize the sliding and locking along the second direction on the radial adjusting unit. Correspondingly, the structure to cooperate with the structure should also be arranged on the radial adjusting unit.

[0046] Further, in another embodiment of the present application, the radial adjusting unit includes the second track 13 and the second electric push cylinder 14. The second track 13 is arranged to extend along the second direction, and the lower end of the second track 13 is slidingly connected with the first track 11 to realize the sliding movement of the radial adjusting unit along the first direction. In this embodiment, the fixed end of the hook 15 is slidingly connected with the second track 13, and the second electric push cylinder 14 is used to drive the hook 15 to move along the second track 13. That is, in this embodiment, the adjustment of the hook 15 along the first direction is realized by the sliding of the second track 13 along the first track 11, and the adjustment of the hook 15 along the second direction is realized by the sliding of the hook 15 along the second track 13.

[0047] Further, in another embodiment of the present application, the radial adjusting unit includes the second track 13 and the second electric push cylinder 14. The second track 13 is arranged to extend along the second direction, and the lower end of the second track 13 is slidingly connected with the first track 11 to realize the sliding movement of the radial adjusting unit along the first direction. In this embodiment, the fixed end of the hook 15 is slidingly connected with the second track 13, and the second electric push cylinder 14 is used to drive the hook 15 to move along the second track 13. That is, in this embodiment, the adjustment of the hook 15 along the first direction is realized by the sliding of the second track 13 along the first track 11, and the adjustment of the hook 15 along the second direction is realized by the sliding of the hook 15 along the second track 13.

[0048] Further, the other end of the hook 15 is the hooking end, and the side of the hooking end to cooperate with the pin shaft is provided with the groove 16 (not shown in the figure), and the buffer pad (not shown in the figure) is arranged in the groove 16.

[0049] Further, in another embodiment of the present application, the radial adjusting unit includes the second track 13 and the second electric push cylinder 14. The second track 13 is arranged to extend along the second direction, and the lower end of the second track 13 is slidingly connected with the first track 11 to realize the sliding movement of the radial adjusting unit along the first direction. In this embodiment, the fixed end of the hook 15 is slidingly connected with the second track 13, and the second electric push cylinder 14 is used to drive the hook 15 to move along the second track 13. That is, in this embodiment, the adjustment of the hook 15 along the first direction is realized by the sliding of the second track 13 along the first track 11, and the adjustment of the hook 15 along the second direction is realized by the sliding of the hook 15 along the second track 13.

[0050] Further, in another embodiment of the present application, the radial adjusting unit includes the second track 13 and the second electric push cylinder 14. The second track 13 is arranged to extend along the second direction, and the lower end of the second track 13 is slidingly connected with the first track 11 to realize the sliding movement of the radial adjusting unit along the first direction. In this embodiment, the fixed end of the hook 15 is slidingly connected with the second track 13, and the second electric push cylinder 14 is used to drive the hook 15 to move along the second track 13. That is, in this embodiment, the adjustment of the hook 15 along the first direction is realized by the sliding of the second track 13 along the first track 11, and the adjustment of the hook 15 along the second direction is realized by the sliding of the hook 15 along the second track 13.

[0051] Further, in order to make the adjustment of the hook adjusting assembly 1 more accurate, in the embodiment, size markings are provided on the first rail 11 and the second rail 13. When adjusting the hook 15, in addition to using the contact sensor and the in-place sensor to detect the position of the hook 15 relative to the pin shaft, the size markings provided on the first rail 11 and the second rail 13 can be used to comprehensively determine the position of the hook 15 relative to the pin shaft in special cases. In addition, the position of the hook 15 can be pre-adjusted based on the size of the gas cylinder liner 5 to be fixed, thereby further improving work efficiency.

[0052] As shown in Figure 1 In order to improve the firmness of the positioning mechanism for positioning the gas cylinder liner 5, in another embodiment of the present application, the bracket 2 is further provided with a holding part 3. The holding part 3 is provided with not less than two holding arms and adjusting cylinders. The lower end of each holding arm is rotatably mounted on the bracket 2 through a mounting seat, and the holding arm is used to fix the gas cylinder liner 5 radially. The adjusting cylinder is movably connected with the holding arm, and is used to drive the holding arm to move.

[0053] Specifically, the holding part 3 is provided with not less than two holding arms and adjusting cylinders. The lower end of each holding arm is rotatably mounted on the bracket 2 through a mounting seat, and the holding arm is used to fix the gas cylinder liner 5 radially. The adjusting cylinder is movably connected with the holding arm, and is used to drive the holding arm to move. That is, when the adjusting cylinder moves after receiving the instruction from the control system, the adjusting cylinder moves while driving the holding arm to realize the closing movement towards the central axis of the bracket 2 or the opening movement away from the central axis of the bracket 2.

[0054] Specifically, the upper end of the holding arm extends obliquely towards the central axis of the bracket 2, and a limiting block is arranged on the inner side of the upper end of the holding arm towards the central axis of the bracket 2. The oblique extension of the upper end of the holding arm towards the central axis of the bracket 2 is arranged in correspondence with the cylindrical structure of the gas cylinder liner 5, so that when the holding arm is closed, the gas cylinder liner 5 can be embraced on the inner side of the holding arm, thereby realizing the fixation. The limiting block is arranged to further fix and limit the gas cylinder liner 5 after the holding arm is closed, so as to prevent the gas cylinder liner 5 from falling off.

[0055] Further, the cylinder body of the adjusting cylinder is rotatably mounted on the bracket 2 through a shaft seat, and the push rod of the adjusting cylinder is rotatably connected to the inner side wall of the lower end of the holding arm through a connecting piece.

[0056] Further, in an embodiment of the present application, the holding part 3 is arranged on both sides of the central axis of the bracket 2 in an interleaved manner.

[0057] Furthermore, in another embodiment of the present invention, the holding part 3 is symmetrically disposed on both sides of the central axis of the bracket 2.

[0058] like Figure 1 As shown, when the hook 15 hooks the pin and adjusts the position of the gas cylinder liner 5 in the first direction (axial direction) as needed, the hook 15 needs to drag the gas cylinder liner 5 along the first direction. In order to reduce the friction of movement, in another embodiment of the present invention, the bracket 2 is also provided with a support part 4. There are no fewer than two support parts 4. Each support part 4 includes two columns, a support block and two rollers. The support block is located on the central axis of the bracket 2. The two columns are respectively located on both sides of the support block and the columns are higher than the support block. Each column and the support block is provided with a roller. The outer wall of the gas cylinder liner 5 is in direct contact with the two rollers. The two columns, the two rollers and the support block can all be connected to form an M-shaped support part 4.

[0059] Furthermore, at least two support sections 4 are provided, each of which includes two columns, one support block, and two rollers. The support block is located on the central axis of the bracket 2, and the two columns are located on both sides of the support block, with the columns being higher than the support block. A roller is provided between each column and the support block, and the outer wall of the gas cylinder liner 5 is in direct contact with the two rollers.

[0060] Specifically, the two uprights can be symmetrically arranged on both sides of the support block along the central axis of the bracket 2, or they can be staggered on both sides at equal distances from the central axis. Regardless of the arrangement, the two uprights, two rollers, and one support block together form an M-shaped support part 4. The M-shaped support part 4 is structurally more stable. Furthermore, the gas cylinder liner 5 can be placed directly in the middle of the M-shape within the V-shaped groove formed by the two rollers and the support block. Under its own weight, the gas cylinder liner 5 will tend to sink towards the deeper V of the V-shaped groove. The V-shaped groove can engage and secure the gas cylinder liner 5, making its placement more stable.

[0061] Further, the lower end of the support block has a telescopic structure which can move up and down in a direction perpendicular to the central axis. Meanwhile, the roller shaft is a sleeve structure, and the inside of the roller shaft is telescopic with a shaft core. That is, the telescopic structure of the lower end of the support block moves up and down, which drives the roller shaft to move up and down as well. Meanwhile, the end of the roller shaft connected with the stand is rotatably connected, and the two roller shafts move symmetrically with the support block. In this way, the support part 4 can support the gas cylinder liner 5 with different diameters and different volumes. When the support block extends upward (in the second direction), the support block drives the roller shafts on both sides to rotate and contract at the same time. At this time, the V-shaped opening formed by the two roller shafts and the support block becomes larger, which can support the gas cylinder liner 5 with a large diameter. Conversely, when the support block retracts downward, the support block drives the roller shafts on both sides to rotate and extend at the same time. At this time, the V-shaped opening formed by the two roller shafts and the support block becomes smaller, which can support the gas cylinder liner 5 with a small diameter.

[0062] Further, the outer wall of the roller shaft is provided with a coating layer having a friction force. The roller shaft is connected with the top end of the stand through an adjusting block, and an adjusting gasket is arranged between the adjusting block and the stand. The adjusting block and the gasket are arranged to lengthen the height of the stand when needed, so that the support part 4 can support the gas cylinder liner 5 with more sizes.

[0063] Further, a driving motor is arranged on the stand, and one end of the roller shaft is connected with the output end of the driving motor (not shown in the figure). Since the roller shaft has a friction force, the rotation of the roller shaft can drive the gas cylinder liner 5 in contact with it to move axially. That is, when the truss manipulator grasps the gas cylinder liner 5 and places it on the support part 4, if the axial placement position of the gas cylinder liner 5 is deviated, the position of the gas cylinder liner 5 needs to be adjusted. The control system can control the driving motor to start and drive the roller shaft to rotate, thereby driving the gas cylinder liner 5 to move axially until the gas cylinder liner 5 reaches the appropriate position, and then the control system controls the driving motor to stop. That is, the control system controls the driving motor and the hook adjusting assembly 1 to move at the same time, which further improves the efficiency of positioning the gas cylinder liner 5.

[0064] Preferably, the coating layer material of the roller shaft is polyurethane.

[0065] Further, the first electric push cylinder 12 and the second electric push cylinder 14 can set the speed during the movement, and realize the accurate position. The gas cylinder liner 5 is placed on the bracket 2, and the center height of the gas cylinder liner 5 is different on the bracket 2 due to different product specifications of the gas cylinder liner 5. The hook adjusting assembly 1 adjusts the height of the hook 15 along the second direction according to the specifications of the gas cylinder liner 5, so that the height of the center of the hook 15 along the second direction is consistent with the height of the pin. Then the hook adjusting assembly 1 moves along the first direction, at this time the contact sensor detects the presence of the pin shaft, and at this time the hook 15 has hooked the pin shaft. Then the hook 15 moves along with the gas cylinder liner 5 along the first direction, so that the position of the pin shaft of the gas cylinder liner 5 is consistent with the actual required position. The position sensor detects whether the pin shaft is in place again. Such a setting is to ensure that the position of the pin shaft of the gas cylinder liner 5 can be smoothly connected to the next link.

[0066] Preferably, the main body of the bracket 2 is welded by a rectangular tube of 80*80*t5 and a plate with a thickness of 30mm, which has sufficient bearing strength and rigidity. The hook 15 is welded by a rectangular tube of 80*40*t5.

[0067] Further preferably, the first electric push cylinder 12 has a pushing force of 3T and a stroke of 100mm, and is controlled by a servo motor.

[0068] Further preferably, the second electric push cylinder 14 has a pushing force of 500KG and a stroke of 600mm, and is controlled by a servo motor.

[0069] Compared with the prior art, the beneficial effects of the present application are as follows:

[0070] The positioning mechanism for the gas cylinder liner provided by the present application can be used before and after heat treatment of the gas cylinder liner, and in some cases where the gas cylinder liner needs to be positioned. By setting the hook adjusting assembly, the positioning mechanism can accurately position gas cylinder liners of different sizes, eliminating the difficulties and safety hazards of manual operation, and greatly improving work efficiency.

[0071] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A positioning mechanism for the inner liner of a gas cylinder, characterized in that, Includes bracket and hook adjustment assembly, The bracket is used to support the inner liner of the gas cylinder; The hook adjustment assembly is located at one end of the bracket and includes a hook, an axial adjustment unit, and a radial adjustment unit; The axial adjustment unit drives the hook to move along a first direction, which is parallel to the axial direction of the gas cylinder liner. The radial adjustment unit drives the hook to move along the second direction, which is perpendicular to the bearing end face of the bracket, while the first direction is parallel to the bearing end face of the bracket. The axial adjustment unit includes a first track and a first electric cylinder, wherein the first track is mounted on the bracket along the first direction; The radial adjustment unit is disposed on the first track and can move along the first direction and the second direction respectively; The hook is provided on the radial adjustment unit and is used to engage with the pin of the gas cylinder liner; The first electric push cylinder is used to drive the radial adjustment unit to move along the first track; The radial adjustment unit includes a second track and a second electric cylinder. The second track extends along the second direction and its lower end is slidably connected to the first track. The fixed end of the hook is slidably connected to the second track; The second electric cylinder is used to drive the hook to move along the second track; The bracket is also provided with support parts, and there are no fewer than two support parts. Each support part includes two columns, one support block, and two rollers. The support block is located on the central axis of the bracket, and the two columns are respectively located on both sides of the support block, with the columns being higher than the support block. Each of the columns and the support blocks is provided with a roller, and the outer side wall of the gas cylinder liner is in direct contact with the two rollers; The two columns, the two rollers, and the support block can all be connected to form an M-shaped support portion; The lower end of the support block is provided with a telescopic structure, which can move up and down in a direction perpendicular to the central axis; the roller is a sleeve structure with a retractable shaft core inside; when the telescopic structure at the lower end of the support block moves up and down, it will drive the roller to move up and down as well. While the roller moves up and down, the end of the roller connected to the column can be rotatably connected, and the two rollers move symmetrically with the support block.

2. The positioning mechanism for the gas cylinder liner according to any one of claims 1, characterized in that, The hook is equipped with a contact sensor and a positioning sensor. The contact sensor is used to detect whether the hook has engaged with the pin. The positioning sensor is used to detect when the pin reaches the designated position.

3. The positioning mechanism for the gas cylinder liner according to claim 2, characterized in that, The other end of the hook is a hooking end, and a groove is provided on the side of the hooking end that cooperates with the pin; a buffer pad is provided in the groove.

4. The positioning mechanism for the gas cylinder liner according to claim 3, characterized in that, There are two first tracks, and both first tracks are installed on the bracket along the first direction.

5. The positioning mechanism for the gas cylinder liner according to claim 4, characterized in that, There are two second tracks, and both second tracks are installed on the first track in the second direction.

6. The positioning mechanism for the gas cylinder liner according to claim 5, characterized in that, Dimension markings are provided on both the first track and the second track.

7. The positioning mechanism for the gas cylinder liner according to claim 6, characterized in that, The bracket is also equipped with a holding part. The holding part is provided in no fewer than two parts, and each holding part includes a holding arm and an adjusting cylinder. The lower end of the holding arm is rotatably mounted on the bracket via a mounting base, and the holding arm is used to radially fix the inner liner of the gas cylinder; The regulating cylinder is movably connected to the holding arm and is used to drive the holding arm to move.

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