Crossing frame for power transmission line

Abstract

The invention provides a crossing frame for a power transmission line, and the crossing frame comprises a frame body which comprises a mounting shaft and at least two supporting frames, the axis of the mounting shaft extends in the horizontal direction, the upper end of the first supporting frame is connected with the first end of the mounting shaft, and the lower end of the first supporting frame is connected with the second end of the mounting shaft; the upper end of the second support frame is connected with the second end of the mounting shaft; the rotating piece is rotatably arranged on the mounting shaft in a sleeving mode, a cable limiting groove is formed in the rotating piece, and the cable limiting groove is of an annular structure extending in the circumferential direction of the mounting shaft; the lower end of each supporting frame is arranged on the corresponding base in a position-adjustable mode. Through the technical scheme provided by the invention, the problem that the construction difficulty is relatively high as the power transmission line is damaged due to friction between the power transmission line and a wooden crossing frame when a worker sets up the power transmission line on the wooden crossing frame in the moving process in the related technology can be solved.

Description

Technical Field

[0001] The invention relates to the technical field of cable construction equipment, and in particular to a spanning frame for transmission lines. Background Art

[0002] With the rapid development of distribution networks, the distance of overhead transmission lines is long, and the power construction in various places is developing rapidly. More and more power lines need to cross highways and high-speed railways. When laying new transmission lines, it is necessary to cross existing transmission lines to avoid contact between transmission lines that affects the normal operation of the power system.

[0003] In the related art, when a cross-over is required, a crossing frame is generally required to be erected for construction. The crossing frame is mainly made of wooden material, which can play an insulating role.

[0004] However, when workers erect transmission lines on wooden spans, the wooden spans will cause friction between the transmission lines and the spans when they move, which may cause damage to the transmission lines and lead to higher difficulty in construction. Summary of the invention

[0005] The present invention provides a crossing frame for power transmission lines, so as to solve the problem in the related art that when workers erect power transmission lines on wooden crossing frames, the wooden crossing frames will cause friction between the power transmission lines and the crossing frames when moving, thus causing damage to the power transmission lines and further leading to high construction difficulty.

[0006] The present invention provides a crossing frame for transmission lines, the crossing frame for transmission lines comprising: a frame body, comprising a mounting shaft and at least two support frames, the axis of the mounting shaft extending in a horizontal direction, the upper end of the first support frame connected to the first end of the mounting shaft, the upper end of the second support frame connected to the second end of the mounting shaft; a rotating member rotatably sleeved on the mounting shaft, the rotating member being provided with a cable limiting groove, the cable limiting groove being an annular structure extending along the circumference of the mounting shaft; at least two bases, the lower end of each support frame being adjustably arranged on the base.

[0007] Furthermore, the rotating member includes a rotating shaft, and a plurality of cable limiting grooves are arranged on an outer side wall of the rotating shaft, and the plurality of cable limiting grooves are arranged at intervals along the axial direction of the rotating shaft.

[0008] Furthermore, the support frame includes a first sub-frame and a second sub-frame, the upper end of the first sub-frame and the upper end of the second sub-frame are both connected to the mounting axis, there is an angle between the first sub-frame and the second sub-frame, and the lower end of the first sub-frame and the lower end of the second sub-frame are both provided with a base.

[0009] Furthermore, the first sub-frame includes multiple mounting tubes and multiple connecting pieces, the upper end of the first mounting tube is connected to the mounting shaft, connecting pieces are provided between two adjacent mounting tubes to connect the two adjacent mounting tubes, and the lower end of the last mounting tube is connected to the base.

[0010] Furthermore, the connecting member includes a first joint and a second joint, the first joint is provided on one of the two adjacent mounting tubes, the second joint is provided on the other of the two adjacent mounting tubes, the first joint extends into the second joint, and the first joint is connected to the second joint by a snap-fit ​​connection.

[0011] Furthermore, the mounting tube is made of glass fiber; and / or the rotating member is made of epoxy resin; and / or a connecting tube is provided between the first sub-frame and the second sub-frame.

[0012] Furthermore, a limiting structure is provided on the installation shaft to prevent the rotating member from moving relative to the installation shaft in the axial direction of the installation shaft.

[0013] Furthermore, the limiting structure includes: a first limiting hole, which is arranged on the first end of the mounting shaft; a second limiting hole, which is arranged on the second end of the mounting shaft; a first limiting screw, which is passed through the first limiting hole and protrudes from the mounting shaft, and the first limiting screw is limitedly matched with the first end of the rotating member; a second limiting screw, which is passed through the second limiting hole and protrudes from the mounting shaft, and the second limiting screw is limitedly matched with the second end of the rotating member.

[0014] Furthermore, the base includes a base body, a first driving member and a first mounting seat, the first driving member is arranged on the base body, the first mounting seat is movably arranged on the base body along the axis of the mounting shaft, the first driving member is drivingly connected to the first mounting seat to drive the first mounting seat to move relative to the base body, and the lower end of the support frame is arranged on the first mounting seat.

[0015] Furthermore, a second driving member and a second mounting seat are provided on the first mounting seat, the second driving member is fixedly provided on the first mounting seat, the second driving member is drivingly connected to the second mounting seat to drive the second mounting seat to move vertically, and the lower end of the support frame is provided on the second mounting seat.

[0016] By applying the technical solution of the present invention, a crossing frame for a transmission line includes a frame body, a rotating member and at least two bases, the frame body includes a mounting shaft and at least two support frames, the axis of the mounting shaft is extended in a horizontal direction, the upper end of the first support frame is connected to the first end of the mounting shaft, and the upper end of the second support frame is connected to the second end of the mounting shaft, so that the mounting shaft can be made by utilizing at least two support frames, and a detachable connection can be achieved between the mounting shaft and the at least two support frames, thereby facilitating the carrying and installation of the frame body. The rotating member can be rotatably mounted on the mounting shaft, and a cable limiting groove is provided on the rotating member, and the transmission line is laid on the cable limiting groove of the rotating member, so that the transmission line can be limited by the cable limiting groove, and the cable limiting groove is an annular structure extending along the circumference of the mounting shaft, so that the transmission line can be laid on the cable limiting groove and can also use the cable limiting groove to cooperate with the transmission line. When the transmission line moves on the rotating member, the cable limiting groove is limited to prevent the transmission line from moving back and forth in the axial direction of the rotating member, and it can also make the transmission line cooperate with the rotating member, and the rotating member rotates relative to the mounting shaft, so as to avoid the problem of friction between the transmission line and the rotating member causing damage to the transmission line. A base is provided at the lower end of each support frame, so that the frame body can be made, and the distance and position between at least two support frames can be adjusted, so as to ensure the structural stability of the crossing frame and improve the practicality and reliability of the crossing frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 A schematic diagram of a spanning rack for a power transmission line provided according to an embodiment of the present invention is shown.

[0019] The above drawings include the following reference numerals:

[0020] 10. frame body; 11. mounting shaft; 12. support frame; 121. first sub-frame; 1211. mounting pipe; 1212. connecting piece; 122. second sub-frame;

[0021] 20. Rotating member; 21. Cable limiting groove; 22. Rotating shaft;

[0022] 30. Base. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] like Figure 1 As shown, an embodiment of the present invention provides a crossing frame for a transmission line, the crossing frame for a transmission line includes a frame body 10, a rotating member 20 and at least two bases 30, the frame body 10 includes a mounting shaft 11 and at least two support frames 12, the axis of the mounting shaft 11 is extended in a horizontal direction, the upper end of the first support frame 12 is connected to the first end of the mounting shaft 11, the upper end of the second support frame 12 is connected to the second end of the mounting shaft 11, and is rotatably mounted on the mounting shaft 11, the rotating member 20 is provided with a cable limiting groove 21, the cable limiting groove 21 is an annular structure extending along the circumference of the mounting shaft 11, and the lower end of each support frame 12 is adjustably arranged on the base 30.

[0025] The crossing frame for transmission lines provided in this embodiment includes a frame body 10, a rotating member 20 and at least two bases 30. The frame body 10 includes a mounting shaft 11 and at least two support frames 12. The axis of the mounting shaft 11 is extended in a horizontal direction. The upper end of the first support frame 12 is connected to the first end of the mounting shaft 11, and the upper end of the second support frame 12 is connected to the second end of the mounting shaft 11, so that the mounting shaft 11 can be made by using at least two support frames 12, and a detachable connection can be achieved between the mounting shaft 11 and the at least two support frames 12, so that the frame body 10 can be carried and installed. The rotating member 20 can be rotatably sleeved on the mounting shaft 11, and a cable limiting groove 21 is provided on the rotating member 20. The transmission line is placed on the cable limiting groove 21 of the rotating member 20, so that the transmission line can be limited by the cable limiting groove 21, and the cable limiting groove 21 is an annular structure extending along the circumference of the mounting shaft 11, so that the transmission line can be placed on the cable limiting groove 21 and can cooperate with the cable limiting groove 21. When the transmission line moves on the rotating member 20, the cable limiting groove 21 is limited. In order to prevent the transmission line from moving back and forth in the axial direction of the rotating part 20, the rotating part 20 can rotate relative to the mounting shaft 11 after the transmission line cooperates with the rotating part 20, thereby preventing the transmission line from being damaged due to friction between the transmission line and the rotating part 20. A base 30 is provided at the lower end of each support frame 12, so that the frame body 10 can be made to function, and the distance and position between at least two support frames 12 can be adjusted to ensure the structural stability of the crossing frame and improve the practicability and reliability of the crossing frame.

[0026] like Figure 1 As shown, the rotating member 20 includes a rotating shaft 22, and a plurality of cable limiting grooves 21 are arranged on the outer side wall of the rotating shaft 22, and the plurality of cable limiting grooves 21 are arranged at intervals along the axial direction of the rotating shaft 22. With the above structure, a plurality of cable limiting grooves 21 are arranged on the outer side wall of the rotating shaft 22, and the plurality of cable limiting grooves 21 are arranged at intervals along the axial direction of the rotating shaft 22, so that the rotating shaft 22 can be used to install a plurality of transmission lines, so that the plurality of transmission lines are correspondingly laid on the plurality of cable limiting grooves 21 of the rotating shaft 22, and then the plurality of transmission lines can be laid using the plurality of cable limiting grooves 21, so that the plurality of transmission lines can be laid on the crossing frame.

[0027] like Figure 1As shown, the support frame 12 includes a first subframe 121 and a second subframe 122, the upper end of the first subframe 121 and the upper end of the second subframe 122 are both connected to the installation shaft 11, there is an angle between the first subframe 121 and the second subframe 122, and the lower end of the first subframe 121 and the lower end of the second subframe 122 are both provided with a base 30. With the above structure, by providing the first subframe 121 and the second subframe 122, the upper ends of the first subframe 121 and the second subframe 122 are both connected to the installation shaft 11, and there is an angle between the first subframe 121 and the second subframe 122, so that the first subframe 121 and the second subframe 122 can be used to support the installation shaft 11, and the structural stability of the support frame 12 is improved, and the base 30 is provided at the lower ends of the first subframe 121 and the second subframe 122, and then the position and distance between the first subframe 121 and the second subframe 122 can be adjusted by using the base 30.

[0028] It should be noted that both support frames 12 have a first sub-frame 121 and a second sub-frame 122 , so that both the first end and the second end of the mounting shaft 11 can be supported.

[0029] like Figure 1 As shown, the first sub-frame 121 includes multiple mounting tubes 1211 and multiple connecting parts 1212. The upper end of the first mounting tube 1211 is connected to the mounting shaft 11, and connecting parts 1212 are arranged between two adjacent mounting tubes 1211 to connect the two adjacent mounting tubes 1211. The lower end of the last mounting tube 1211 is connected to the base 30. By adopting the above structure, the multiple mounting tubes 1211 on the first sub-frame 121 are spliced ​​and installed through the multiple connecting pieces 1212, so that the multiple support frames 12 can be detachably connected. After the multiple mounting tubes 1211 are spliced, the upper end of the first mounting tube 1211 is connected to the mounting shaft 11, and the lower end of the last mounting tube 1211 is connected to the base 30. By setting the connecting piece 1212, the two adjacent mounting tubes 1211 can be detachably connected, and the height of the multiple support frames 12 can also be adjusted according to the working environment. When the crossing frame to be erected is higher, a larger number of mounting tubes 1211 are set to be connected through the multiple connecting pieces 1212. When the crossing frame to be erected is lower, a smaller number of mounting tubes 1211 are set to be connected through the multiple connecting pieces 1212, so as to ensure that the height of the support frame 12 can be adjusted, thereby improving the stability of the support frame 12.

[0030] In this embodiment, the connecting member 1212 includes a first joint and a second joint. The first joint is provided on one of the two adjacent mounting tubes 1211, and the second joint is provided on the other of the two adjacent mounting tubes 1211. The first joint extends into the second joint, and the first joint and the second joint are connected by snapping. With the above structure, the first joint is provided on one of the two adjacent mounting tubes 1211, and the second joint is provided on the other of the two adjacent mounting tubes 1211. The first joint can extend into the second joint and the first joint can be snapped with the second joint, so that the two adjacent mounting tubes 1211 can be detachably connected under the action of the first joint and the second joint.

[0031] In this embodiment, the mounting tube 1211 is made of glass fiber. With the above structure, the mounting tube 1211 is made of glass limit material, which can ensure the structural strength of the mounting tube 1211, ensure the supporting function, and also play the role of insulation.

[0032] In this embodiment, the rotating member 20 is made of epoxy resin. With the above structure, the rotating member 20 is made of epoxy resin, which is convenient for production and processing and can also play an insulating role.

[0033] In this embodiment, a connecting pipe is provided between the first sub-frame 121 and the second sub-frame 122. With the above structure, the first sub-frame 121 and the second sub-frame 122 are connected by the connecting pipe, which can improve the structural strength and stability of the support frame 12.

[0034] In this embodiment, a limiting structure is provided on the installation shaft 11 to prevent the rotating member 20 from moving relative to the installation shaft 11 in the axial direction of the installation shaft 11. With the above structure, the limiting structure provided on the installation shaft 11 can limit the rotating member 20 and prevent the rotating member 20 from separating from the installation shaft 11.

[0035] In this embodiment, the limiting structure includes a first limiting hole, a second limiting hole, a first limiting screw and a second limiting screw. The first limiting hole is provided on the first end of the mounting shaft 11, the second limiting hole is provided on the second end of the mounting shaft 11, the first limiting screw is passed through the first limiting hole and protrudes from the mounting shaft 11, the first limiting screw is limitedly matched with the first end of the rotating member 20, the second limiting screw is passed through the second limiting hole and protrudes from the mounting shaft 11, and the second limiting screw is limitedly matched with the second end of the rotating member 20. With the above structure, the first limiting hole is provided on the first end of the mounting shaft 11, the second limiting hole is provided on the second end of the mounting shaft 11, the first limiting screw is passed through the first limiting hole, and the second limiting screw is passed through the second limiting hole, so that the first end and the second end of the rotating member 20 are respectively stopped and matched with the first limiting screw and the second limiting screw, which can play a limiting role on the rotating member 20.

[0036] It should be noted that an LED light limiter is provided on the mounting shaft 11, which will automatically flash at night to serve as a warning.

[0037] In this embodiment, the base 30 includes a base body, a first driving member and a first mounting seat, the first driving member is arranged on the base body, the first mounting seat is movably arranged on the base body along the axis of the mounting shaft 11, the first driving member is drivingly connected to the first mounting seat to drive the first mounting seat to move relative to the base body, and the lower end of the support frame 12 is arranged on the first mounting seat. With the above structure, by setting the base body, the first driving member and the first mounting seat, the first driving member is arranged on the base body, the first driving member can drive the first mounting seat to be movably arranged on the base body along the axis of the mounting shaft 11, and then the first mounting seat can be driven to move relative to the base body, the lower ends of the first sub-frame 121 and the second sub-frame 122 are both provided with bases, and then the distance between the first sub-frame 121 of the first support frame 12 and the second sub-frame 122 of the second support frame 12 can be adjusted.

[0038] It should be noted that the first driving member includes a first driving motor, a fixed block is provided at the lower end of the first mounting seat, a telescopic rod is provided between the first driving motor and the first mounting seat, and the fixed block is provided on the telescopic rod. The telescopic rod is driven by the first driving motor to move, thereby driving the first mounting seat to move along the axis of the mounting shaft 11.

[0039] In this embodiment, a second driving member and a second mounting seat are provided on the first mounting seat, the second driving member is fixedly provided on the first mounting seat, the second driving member is drivingly connected to the second mounting seat to drive the second mounting seat to move vertically, and the lower end of the support frame 12 is provided on the second mounting seat. With the above structure, a second driving member is provided on the first mounting seat, the second driving member is drivingly connected to the second mounting seat and can drive the second mounting seat to move vertically, so as to ensure that the height between at least two support frames 12 can be adjusted. Specifically, the lower ends of the first sub-frame 121 and the second sub-frame 122 are both provided with a base 30, so as to adjust the height between the support frame 12 at the first end of the mounting shaft 11 and the support frame 12 at the second end of the mounting shaft 11, so as to ensure the structural stability of the spanning frame.

[0040] It should be noted that a third driving member and a turntable may also be provided on the second mounting seat, and the third driving member is connected to the turntable driving device, thereby driving the turntable to rotate. The lower end of the support frame 12 is provided on the turntable, and the structural stability between two adjacent support frames 12 is ensured by adjusting the rotation angle of the turntable.

[0041] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0042] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0043] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0044] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0045] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A spanning frame for a transmission line, characterized in that: The spanning frame for transmission lines comprises: The frame body (10) comprises a mounting shaft (11) and at least two support frames (12), wherein the axis of the mounting shaft (11) is extended in the horizontal direction, the upper end of the first support frame (12) is connected to the first end of the mounting shaft (11), and the upper end of the second support frame (12) is connected to the second end of the mounting shaft (11); A rotating member (20) is rotatably sleeved on the installation shaft (11), and a cable limiting groove (21) is provided on the rotating member (20), and the cable limiting groove (21) is an annular structure extending along the circumference of the installation shaft (11); At least two bases (30), and the lower end of each support frame (12) is arranged on the base (30) in an adjustable manner.

2. The spanning frame for power transmission lines according to claim 1, characterized in that: The rotating member (20) comprises a rotating shaft (22), and a plurality of cable limiting grooves (21) are arranged on the outer side wall of the rotating shaft (22). The plurality of cable limiting grooves (21) are arranged at intervals along the axial direction of the rotating shaft (22).

3. The spanning frame for power transmission lines according to claim 1, characterized in that: The support frame (12) comprises a first sub-frame (121) and a second sub-frame (122); the upper end of the first sub-frame (121) and the upper end of the second sub-frame (122) are both connected to the mounting shaft (11); an angle exists between the first sub-frame (121) and the second sub-frame (122); and the lower end of the first sub-frame (121) and the lower end of the second sub-frame (122) are both provided with the base (30).

4. The spanning frame for power transmission lines according to claim 3, characterized in that: The first sub-frame (121) comprises a plurality of mounting tubes (1211) and a plurality of connecting pieces (1212); the upper end of the first mounting tube (1211) is connected to the mounting shaft (11); the connecting piece (1212) is provided between two adjacent mounting tubes (1211) to connect the two adjacent mounting tubes (1211); and the lower end of the last mounting tube (1211) is connected to the base (30).

5. The spanning frame for power transmission lines according to claim 4, characterized in that: The connecting member (1212) comprises a first joint and a second joint, wherein the first joint is arranged on one of the two adjacent mounting tubes (1211), and the second joint is arranged on the other of the two adjacent mounting tubes (1211), the first joint extends into the second joint, and the first joint is connected to the second joint by a snap-fit ​​connection.

6. The spanning frame for power transmission lines according to claim 4, characterized in that: The installation tube (1211) is made of glass fiber material; and / or, The rotating member (20) is made of epoxy resin; and / or, A connecting pipe is provided between the first sub-frame (121) and the second sub-frame (122).

7. The spanning frame for power transmission lines according to any one of claims 1 to 6, characterized in that: A limiting structure is provided on the installation shaft (11) to prevent the rotating member (20) from moving relative to the installation shaft (11) in the axial direction of the installation shaft (11).

8. The spanning frame for power transmission lines according to claim 7, characterized in that: The limiting structure comprises: A first limiting hole is arranged on the first end of the mounting shaft (11); A second limiting hole is arranged on the second end of the mounting shaft (11); a first limiting screw, which is passed through the first limiting hole and protrudes from the mounting shaft (11), and the first limiting screw is limitedly matched with the first end of the rotating member (20); A second limiting screw is inserted into the second limiting hole and protrudes from the mounting shaft (11), and the second limiting screw is limitedly matched with the second end of the rotating member (20).

9. The spanning frame for power transmission lines according to any one of claims 1 to 6, characterized in that: The base (30) comprises a base body, a first driving member and a first mounting seat, wherein the first driving member is arranged on the base body, the first mounting seat is movably arranged on the base body along the axis of the mounting shaft (11), the first driving member is drivingly connected to the first mounting seat to drive the first mounting seat to move relative to the base body, and the lower end of the support frame (12) is arranged on the first mounting seat.

10. The spanning frame for power transmission lines according to claim 9, characterized in that: A second driving member and a second mounting seat are arranged on the first mounting seat, the second driving member is fixedly arranged on the first mounting seat, the second driving member is drivingly connected to the second mounting seat to drive the second mounting seat to move vertically, and the lower end of the support frame (12) is arranged on the second mounting seat.

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