An unstable photovoltaic power generation energy conversion device

Abstract

The application relates to an unstable photovoltaic power generation energy conversion device, and relates to the technical field of photovoltaic power generation, which comprises a cable, a sliding installation device arranged on the cable, a first installation base installed on the cable, a hook installation base for installing gravity blocks and detachably installed on the first installation base, and changing equipment for separating the hook installation base and the first installation base arranged at the highest end of the supporting equipment. The gravity blocks are separated from the cable by the changing equipment, the remaining gravity blocks continuously move towards the highest end, the distance between the gravity blocks is shortened, the gravitational potential energy of the gravity blocks can be stored when the electric energy is sufficient, the gravity blocks can be moved to the output end of the cable when electric energy compensation is needed, power generation is realized, the energy conversion efficiency of the gravity blocks is ensured, and energy is saved.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic power generation technology, specifically to an energy conversion device based on unstable photovoltaic power generation. Background Technology

[0002] Photovoltaic power generation uses photovoltaic panels to capture solar energy and convert it into electrical energy. However, the intensity of sunlight varies over time and with weather conditions, making solar power generation inherently unstable.

[0003] Based on the above-mentioned technical problems, the existing technology uses energy compensation to solve the problem. For example, in the patent document with application number 202310661154.4, a gravity energy storage system is disclosed. When the energy conversion is sufficient, the heavy object is lifted. When the energy conversion is insufficient, the heavy object is released. Through the release of the heavy object, the gravitational potential energy of the heavy object is converted into electrical energy, thereby realizing energy compensation for the power generation system.

[0004] In the above technical solution, the heavy objects are usually transported by a track system. In order to achieve the stability of the track, the distance between adjacent heavy objects is relatively large. When the first group of heavy objects is transported to the top of the track, the gravitational potential energy of the first group of heavy objects reaches its maximum. When the first group of heavy objects is released, electrical energy is generated. At this time, some of the energy needs to be converted into the gravitational potential energy of the second group of heavy objects, the third group of heavy objects, and so on, which affects the efficiency of converting gravitational potential energy into electrical energy. Summary of the Invention

[0005] The purpose of this invention is to provide an energy conversion device based on unstable photovoltaic power generation.

[0006] The technical problem solved by this invention is to address the issue in the prior art where, when multiple heavy objects are undergoing energy conversion, the heavy object undergoing energy conversion needs to provide energy to the heavy object that has not reached the highest level, thus affecting the efficiency of gravitational potential energy conversion.

[0007] The present invention can be achieved through the following technical solution: an unstable photovoltaic power generation energy conversion device, including a cable, the cable being installed at an angle on a support device, and several sets of sliding installation devices for bearing gravity blocks being evenly arranged on the cable. The sliding installation device includes a first installation base installed on the cable, and a hook installation base for installing gravity blocks is detachably installed on the first installation base. The highest point of the support device is provided with a modification device for separating the hook installation base and the first installation base.

[0008] A further technical improvement of the present invention is that: a first mounting groove is provided on the first mounting base, a side groove is provided on the side of the first mounting groove, a side limiting base is installed at the bottom of the hook mounting base, and the side limiting base and the side groove are connected in cooperation.

[0009] A further technical improvement of the present invention is that: an installation plate for pressing the side limiting base tightly into the side groove is slidably disposed inside the first mounting groove.

[0010] A further technical improvement of the present invention is that: a mounting slide rod is fixed to the side of the mounting plate, an end base is fixed to the end of the mounting slide rod, and the end base is installed at the output end of the third telescopic rod.

[0011] A further technical improvement of the present invention is that: the hook mounting base is provided with several sets of limiting slide grooves, and the modified device includes several sets of limiting slide rods, which are slidably connected to the limiting slide grooves respectively.

[0012] A further technical improvement of the present invention is that the modified device also includes a limiting push plate for cooperating with the side limiting base. The limiting push plate is installed at the output end of the first telescopic rod, and the limiting push plate is connected to the limiting slide rod.

[0013] A further technical improvement of the present invention is that: a supporting shell is fixed to the end of the first telescopic rod, a second telescopic rod is fixed inside the supporting shell, and the output end of the second telescopic rod is connected to the limiting slide rod.

[0014] A further technical improvement of the present invention is that: the first telescopic rod is fixedly installed on the telescopic base, a movable sleeve is fixed on the telescopic base, the movable sleeve and the movable limiting rod are longitudinally slidably connected, the end of the telescopic base is slidably connected to the rotating shaft, and the rotating shaft is provided with a rotating spiral groove that cooperates with the telescopic base, and the rotating shaft is controlled by a power device.

[0015] A further technical improvement of the present invention is that the movable limiting rod is fixedly installed on the shift turntable, and multiple sets of movable limiting rods and rotating shafts are provided.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. In use, this application involves fixing multiple sets of first mounting bases to a cable. The cable moves the first mounting bases, which in turn move the hook mounting bases on the first mounting bases, thereby moving the gravity blocks. Since the cable is installed at an angle on the support equipment, the gravity blocks move upwards, increasing their gravitational potential energy. Furthermore, because the first mounting bases and hook mounting bases are separable, when the gravity blocks reach the highest point of the support equipment, they can be separated from the cable using a switching device. The remaining gravity blocks continue to move towards the highest point, shortening the distance between them. This allows for the storage of gravitational potential energy from multiple gravity blocks when there is sufficient power. When power compensation is needed, the gravity blocks can be moved back to the output end of the cable to generate electricity, ensuring the energy conversion efficiency of the gravity blocks and saving energy.

[0018] 2. This application adopts a side limiting base and a side groove for connection. Under the action of the mounting plate, the side limiting base and the side groove are relatively stable. If it is necessary to separate the first mounting base and the hook mounting base, it is only necessary to move the mounting plate away from the side limiting base and control the side limiting base to move away from the side groove to achieve the separation of the hook mounting base and the first mounting base. This process enables the unloading speed of the gravity block to be faster and does not affect the potential energy increase of the other gravity blocks on the cable.

[0019] 3. This application employs a limiting push plate and a limiting slide rod that move simultaneously under the action of the first telescopic rod. This allows the limiting push plate to push the side limiting base to the side groove position, pushing the side limiting base away from the side groove. At this time, the limiting slide rod can support the hook mounting base, maintaining its stability. Simultaneously, under the activation action of the second telescopic rod, the hook mounting base moves longitudinally, separating the limiting push plate from the side groove. This achieves the separation of the hook mounting base and the first mounting base. In this process, both stable support for the hook mounting base and separation of the first mounting base and the hook mounting base are achieved, quickly unloading the gravity block from the cable.

[0020] 4. In this application, the potential energy of multiple sets of gravity blocks is maintained by using a repositioning turntable and a rotating shaft. Specifically, the rotation of the rotating shaft allows the telescopic base to slide adaptively on the rotating spiral groove, thereby raising the height of the gravity blocks. Subsequently, the rotation of the repositioning turntable adjusts the position of the gravity blocks, moving them away from the cable and storing their potential energy. Furthermore, due to the action of multiple rotating shafts and moving limit rods, the potential energy of multiple sets of gravity blocks can be stored, facilitating sufficient electrical energy compensation when photovoltaic power generation is unstable. Attached Figure Description

[0021] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0022] Figure 1 This is a schematic diagram showing the relative structures of the modified device and the sliding installation device of the present invention;

[0023] Figure 2 This is a schematic diagram of the transport of the gravity block according to the present invention;

[0024] Figure 3 This is a schematic diagram of the hook mounting base structure of the present invention;

[0025] Figure 4 This is a schematic diagram of the transposition turntable structure of the present invention;

[0026] Figure 5 This is a schematic diagram showing the position of the third telescopic rod of the present invention.

[0027] In the diagram: 1. Power equipment; 2. Sliding installation equipment; 21. First mounting base; 22. First mounting groove; 23. Mounting slide rod; 24. End base; 25. Mounting spring; 26. Placement groove; 27. Hook mounting base; 28. Limiting slide groove; 29. ​​Connecting rod; 210. Side limiting base; 211. Side groove; 212. Mounting plate; 213. Third telescopic rod; 214. Hook mounting seat; 215. Hollow groove; 216. Bottom 61. Groove; 62. Hook; 63. Gravity block; 64. Cable; 65. Changing equipment; 66. First telescopic rod; 67. First push plate; 68. First fixed plate; 69. Support shell; 60. Second telescopic rod; 61. Slide rod mounting base; 62. Limiting slide rod; 63. Internal groove; 64. Limiting push plate; 65. Rotating spiral groove; 66. Rotating shaft; 67. Changing turntable; 68. Moving sleeve; 69. Telescopic base; 60. Moving limiting rod. Detailed Implementation

[0028] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structure, features and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0029] Please see Figure 1-5 As shown, an unstable photovoltaic power generation energy conversion device includes a power device 1. The power device 1 controls the start of the cable 5, thereby driving the gravity block 4 on the cable 5 to move, so as to raise or lower the gravity block 4. Therefore, several sets of sliding installation devices 2 are evenly arranged at the output end of the cable 5, and hooks 3 are provided at the output end of the sliding installation devices 2 for hanging the gravity block 4.

[0030] Specifically, in use, by evenly installing the gravity block 4 on the hook 3, the starting of the power device 1 drives the sliding installation device 2 to slide under the action of the cable 5, so as to realize the lifting or lowering of the gravity block 4, thereby realizing the function of storing or releasing gravitational potential energy.

[0031] The principle behind the above technical solution is to store the gravitational potential energy by lifting the object to a high place. When the energy needs to be released, the object falls and releases the energy, converting the gravitational potential energy into mechanical energy or electrical energy.

[0032] Therefore, this application also includes a support system. The main function of the support system in this application is to increase the height of the falling object. It is constructed of steel supports and the height of its platform is 50 meters.

[0033] The power equipment 1 in this application consists of a turntable made of cast steel. Anti-slip nylon blocks are embedded at the bottom of the turntable. The upper turntable acts as the driving wheel, connecting the motor and electrical appliances, while the lower turntable acts as the driven wheel, assisting in rotation. The upper and lower turntables are connected by a steel wire rope. A cable gripper and an automatic release device are used to hang heavy objects. The cable gripper is adjustable in multiple places and, after processing, securely holds the steel wire rope. The automatic release device is connected to the cable gripper by two thin steel pipes, allowing for angle adjustments. When a heavy object is hung, it hangs vertically downwards. The automatic release device consists of rotatable hooks that automatically release when the weight decreases upon hitting the ground. The turntable has a diameter of 1.5 meters, and the weight of the gravity block is 50 kilograms.

[0034] After the heavy object falls to the ground and is unhooked, it is transported by a conveyor belt to the bottom of the elevated structure. An electric motor then lifts the heavy object to a platform at a certain height and stores the energy as gravitational potential energy. The parameters of the electric motor are: frequency 50 Hz, speed 1380 rpm, and power 30 kilowatts.

[0035] Based on the above technical solution, the time for the heavy object to slide down once is about 35 seconds, and the generated electrical energy is about 700 kilojoules.

[0036] In order to maximize the energy storage of the transported gravity block 4, a change device 6 is installed at the highest end of the support system to change the distance between adjacent gravity blocks 4 when they reach the highest point.

[0037] Therefore, in this application, the sliding installation device 2 includes a first installation base 21, wherein the first installation base 21 is fixedly installed on the cable 5, and multiple sets of first installation bases 21 are provided on the cable 5. In use, the cable 5 is used to move the first installation base 21. A hook installation base 27 is detachably installed on the first installation base 21, wherein the hook installation base 27 and the hook 3 are fixedly connected, and the hook 3 is used to hang the gravity block 4. The alteration device 6 is used to detach the hook installation base 27 from the first installation base 21 to temporarily fix the height of the gravity block 4 on the hook installation base 27.

[0038] In operation, when the photovoltaic power generation is strong, the power device 1 is activated, causing the cable 5 to move. This causes the first mounting base 21 to move along with the cable 5. Under the action of the hook mounting base 27, the gravity block 4 moves upward, increasing its gravitational potential energy. When the first gravity block 4 reaches its highest point, the alteration device 6 is activated to separate the first mounting base 21 from the hook mounting base 27. The first mounting base 21 then moves downward, while the second gravity block 4 gradually rises to its highest point. This shortens the distance between the gravity blocks 4, thus enabling the gravity blocks 4 to stably store energy. This ensures sufficient energy reserves when photovoltaic power generation is unstable, providing stable compensation for the photovoltaic power generation.

[0039] Therefore, in this application, a first mounting groove 22 is provided on the first mounting base 21, and a side groove 211 is provided on the side of the first mounting groove 22. A connecting rod 29 is fixed at the bottom of the hook mounting base 27, and a side limiting base 210 is fixed at the end of the connecting rod 29. The side limiting base 210 and the side groove 211 are engaged, so the upper part of the side limiting base 210 is flat to cooperate with the side groove 211. A mounting plate 212 is slidably provided inside the first mounting base 21, and the mounting plate 212 is used to support the side limiting base 211. 10 is pushed, causing the side limiting base 210 to be pushed into the side groove 211 and engage with it. Therefore, in use, by pushing the side limiting base 210 into the side groove 211, the mounting plate 212 is used to push it into the side groove 211. Then, under the action of the gravity block 4, the hook mounting base 27 is pulled. At this time, the side limiting base 210 and the side groove 211 engage with each other, preventing the first mounting base 21 and the hook mounting base 27 from separating when the gravity block 4 moves.

[0040] A placement groove 26 is provided on the side of the first mounting base 21, which is used to limit the placement of the mounting plate 212. A mounting slide rod 23 is fixed on the side of the mounting plate 212, which extends out of the first mounting base 21. An end base 24 is fixed at the end of the mounting slide rod 23. The end base 24 and the first mounting base 21 are connected by a mounting spring 25. The mounting spring 25 is used to push the mounting plate 212, so that the mounting plate 212 pushes the side limiting base 210 into the side groove 211, thereby realizing the snap-fit ​​function between the side limiting base 210 and the side groove 211.

[0041] In another embodiment of this application, in order to achieve the stability of the mounting plate 212, the mounting spring 25 is replaced with a third telescopic rod 213, wherein the third telescopic rod 213 is fixedly installed on the first mounting base 21, and the end base 24 is installed on the output end of the third telescopic rod 213. By activating the third telescopic rod 213, the sliding of the mounting slide rod 23 on the first mounting base 21 is controlled, thereby controlling the position of the mounting plate 212, so that the mounting plate 212 can be stably pressed against the side limiting base 210, so that the side limiting base 210 and the side groove 211 are engaged.

[0042] In order to push the side limiting base 210 out of the side groove 211 and separate the first mounting base 21 and the hook mounting base 27, the device 6 is modified to include a limiting push plate 69. The side limiting base 210 is pushed out of the side groove 211 by the laterally moving limiting push plate 69. The size of the limiting push plate 69 matches the size of the side groove 211, so that the side limiting base 210 can be pushed out stably.

[0043] To ensure the stability of the hook mounting base 27 when the side limiting base 210 is pushed out of the side groove 211, a limiting slide rod 67 is installed on the limiting push plate 69, and a limiting slide groove 28 is installed on the hook mounting base 27. The limiting slide groove 28 and the limiting slide rod 67 cooperate to support the hook mounting base 27, thereby providing stable support for the gravity block 4 on the hook mounting base 27. In use, the lateral movement of the limiting push plate 69 drives the limiting slide rod 27 to achieve stability. The movement of the slide rod 67 causes the limiting slide rod 67 to enter the interior of the limiting slide groove 28, thereby supporting the hook mounting base 27 until the side limiting base 210 and the side groove 211 disengage, controlling the hook mounting base 27 to move away from the first mounting groove 22. At this time, the limiting push plate 69 is retracted. Since the limiting slide rod 67 is relatively long, it still remains inside the limiting slide groove 28, thereby supporting the hook mounting base 27 and thus supporting the gravity block 4.

[0044] The limiting push plate 69 is fixedly installed inside the supporting shell 64, wherein the supporting shell 64 is installed at the output end of the first telescopic rod 61. The position of the supporting shell 64 is controlled by the first telescopic rod 61, thereby controlling the position of the limiting push plate 69 and realizing the control of the lateral position of the limiting slide rod 67.

[0045] An internal groove 68 is formed inside the supporting shell 64, and a first fixing plate 63 is fixed inside the internal groove 68. The first fixing plate 63 is fixedly mounted on a first push plate 62, and the first push plate 62 is fixedly connected to a first telescopic rod 61. That is, the lateral position of the first fixing plate 63 can be controlled by the first telescopic rod 61. A second telescopic rod 65 is fixed on the first fixing plate 63, and a slide rod mounting base 66 is fixed to the end of the second telescopic rod 65. The slide rod mounting base 66 is fixedly connected to a limiting slide rod 67, and the slide rod mounting base 66 provides protective support for the limiting slide rod 67. Therefore, in this application, the height of the slide rod mounting base 66 is controlled by the activation of the second telescopic rod 65, thereby controlling the height of the limiting slide rod 67, which in turn controls the height of the hook mounting base 27, thereby controlling the height of the gravity block 4 and achieving support for the gravity block 4.

[0046] In order to achieve a stable sliding connection between the limiting slide rod 67 and the limiting slide groove 28, the limiting slide groove 28 includes a hollow groove 215 and a bottom groove 216. Therefore, there are multiple sets of limiting slide rods 67, and the limiting slide rods 67 are slidably connected to the bottom groove 216 and the hollow groove 215 respectively, so as to achieve stable support for the gravity block 4 and avoid the problem of falling. At the same time, a hook mounting base 214 for installing the hook 3 is fixed on the hook mounting base 27.

[0047] In this application, in order to control the height of the hook mounting base 27, that is, to control the height of the hook mounting base 27 when it is detached from the first mounting base 21, the first telescopic rod 61 is fixedly mounted on the telescopic base 614. A movable sleeve 613 is fixed on the telescopic base 614. The movable sleeve 613 and the movable limiting rod 615 are longitudinally slidably connected. The movable limiting rod 615 is fixedly mounted on the shifting turntable 612. Multiple sets of rotating shafts 611 rotate on the shifting turntable 612. The rotating shafts 611 are controlled by a rotating motor. A rotating spiral groove 610 is opened on the rotating shaft 611. The end of the telescopic base 614 slides inside the rotating spiral groove 610. That is, in use, the rotating shaft 611 is rotated by the rotating motor, so that the telescopic base 614 slides inside the rotating spiral groove 610, thereby controlling the height of the movable sleeve 613 and making the movable sleeve 613 slide longitudinally on the movable limiting rod 615, thereby achieving the height limitation of the gravity block 4.

[0048] In this application, the transposition turntable 612 is rotatable, thereby controlling the position of the gravity block 4 through rotation. When the first gravity block 4 reaches its highest point, it is rotated to a position away from the cable 5, thus storing the gravity energy of the first gravity block 4. As the cable 5 continues to work, when the second gravity block 4 reaches its top, it is transferred, thus storing the gravitational potential energy of the second gravity block 4. This process continues, so the transposition turntable 612 can store the gravitational potential energy of multiple sets of gravity blocks 4. When the gravitational potential energy needs to be converted into mechanical energy or electrical energy, it is only necessary to reinstall the hook mounting base 27 on the first mounting base 21. The movement of the first mounting base 21 can be used to realize the energy conversion of the gravity block 4, achieving full energy conversion and ensuring the energy conversion rate.

[0049] In use, the invention utilizes the activation of the power device 1 to activate the cable 5, which in turn hangs the gravity block 4 on the hook 3. The gravity block 4 is then lifted as the cable 5 moves, thus converting the kinetic energy of the power device 1 into the potential energy of the gravity block 4. This process continues until the gravity block 4 reaches its highest point, thereby storing the gravitational potential energy.

[0050] In this application, since multiple sets of first mounting bases 21 are provided, the mounting spring 25 is used to make the mounting slide rod 23 slide inside the first mounting base 21. At this time, the mounting plate 212 is pressed tightly against the side limiting base 210 to realize the side limiting base 210 being inserted into the side groove 211. At this time, the gravity block 4 is lifted along with the cable 5, and multiple sets of gravity blocks 4 are provided on the cable 5 to improve the gravitational potential energy storage efficiency.

[0051] When the first gravity block 4 moves to its highest position, the first telescopic rod 61 is activated, controlling the support shell 64 to move laterally, thereby controlling the limiting push plate 69 to move laterally, causing the side limiting base 210 to move out of the side groove 211. Simultaneously, while the limiting push plate 69 is moving laterally but not yet inside the side groove 211, the limiting slide rod 67 slides directly into the limiting slide groove 28, thus providing support for the hook mounting base 27. When the limiting push plate 69 moves... When the slide reaches its final position, the limiting slide bar 67 moves out partially from the side of the limiting slide groove 28 away from the inlet. Then, under the action of the second telescopic rod 65, the slide bar mounting base 66 moves longitudinally, lifting the hook mounting base 27 and creating a height difference between the side limiting base 210 and the side groove 211. At this point, the activation of the first telescopic rod 61 causes the limiting push plate 69 to move out from inside the side groove 211. The rotating shaft 611 is then rotated using a rotating motor, causing the telescopic base 66 to move further out of the groove. 14 slides inside the rotating spiral groove 610, thereby controlling the height of the moving sleeve 613, allowing the moving sleeve 613 to slide longitudinally on the moving limit rod 615, thus limiting the height of the gravity block 4. Subsequently, the rotation of the shifting turntable 612 causes the gravity block 4 to rotate, realizing the storage of gravitational potential energy of the gravity block 4, that is, realizing the storage of gravity of the first gravity block 4. At this time, with the continuous work of the cable 5, the gravity can be stored when the second gravity block 4 reaches the top. Block 4 is transferred, thereby realizing the storage of gravitational potential energy of the second gravity block 4, and so on. Therefore, the transposition turntable 612 can realize the storage of gravitational potential energy of multiple sets of gravity blocks 4. When the gravitational potential energy is converted into mechanical energy or electrical energy, it is only necessary to install the hook mounting base 27 inside the side groove 211 to realize the cooperation connection between the first mounting base 21 and the hook mounting base 27. Utilizing the effect of gravity, the gravity block 4 slides downward under the action of the cable 5 to realize the conversion of potential energy.

[0052] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. An unstable photovoltaic power generation energy conversion device, comprising a cable (5), the cable (5) being installed obliquely on a support device, and a plurality of sliding installation devices (2) for supporting a gravity block (4) being uniformly arranged on the cable (5), characterized in that: The sliding installation device (2) includes a first mounting base (21) mounted on a cable (5), on which a hook mounting base (27) for mounting a gravity block (4) is detachably mounted, and at the highest end of the support device is a change device (6) for separating the hook mounting base (27) and the first mounting base (21). The first mounting base (21) is provided with a first mounting groove (22), and a side groove (211) is provided on the side of the first mounting groove (22). A side limiting base (210) is installed at the bottom of the hook mounting base (27), and the side limiting base (210) and the side groove (211) are connected in cooperation. The first mounting groove (22) is slidably provided with a mounting plate (212) for pressing the side limiting base (210) tightly into the side groove (211). The mounting plate (212) is fixed with a mounting slide rod (23) on its side, and the mounting slide rod (23) is fixed with an end base (24) at its end, and the end base (24) is installed at the output end of the third telescopic rod (213); The hook mounting base (27) is provided with several sets of limiting slide grooves (28), and the alteration device (6) includes several sets of limiting slide rods (67), which are slidably connected to the limiting slide grooves (28) respectively; The alteration device (6) also includes a limiting push plate (69) for cooperating with the side limiting base (210), the limiting push plate (69) is installed at the output end of the first telescopic rod (61), and the limiting push plate (69) is connected to the limiting slide rod (67); The end of the first telescopic rod (61) is fixed with a support shell (64), and a second telescopic rod (65) is fixed inside the support shell (64). The output end of the second telescopic rod (65) is connected to the limiting slide rod (67). The first telescopic rod (61) is fixedly installed on the telescopic base (614), and a movable sleeve (613) is fixed on the telescopic base (614). The movable sleeve (613) and the movable limiting rod (615) are longitudinally slidably connected. The end of the telescopic base (614) is slidably connected to the rotating shaft (611), and the rotating shaft (611) is provided with a rotating spiral groove (610) that cooperates with the telescopic base (614). The rotating shaft (611) is controlled by a power device. The movable limiting rod (615) is fixedly installed on the shift turntable (612), and multiple sets of the movable limiting rod (615) and the rotating shaft (611) are provided.

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