A solar energy storage device

Abstract

The present invention relates to the field of solar energy storage technology, specifically a solar energy storage device, including a solar water heater main body, the solar water heater main body including a bracket, a water tank and a heat collecting pipe connected to the water tank are arranged on the bracket, and also includes a hollow rotating shaft rotatably arranged on the water tank. The device drives a stirring blade to rotate with the help of a driving component to achieve mixing of the water in the water tank. During the rotation of the stirring blade, the angle switching component is used to drive the stirring blade to switch the angle deflection, so as to promote the upper water body of the water tank to flow from left to right and the lower water body to flow from right to left, thereby forming a circulating convection. This design can effectively avoid the stratification of cold and hot water in the water tank, while ensuring that the water temperatures at the left and right ends of the water tank tend to be consistent, significantly improving the balance of the water temperature in the water tank. In addition, the rotation process of the stirring blade can also reduce the possibility of scale condensation.

Description

Technical Field

[0001] The present invention relates to the technical field of solar energy storage, and in particular to a solar energy storage device. Background Art

[0002] As a device that efficiently utilizes solar energy, the core function of a solar energy storage device is to collect, convert, and store solar energy, and release the energy when needed. In the civilian field, solar water heaters are the most representative solar energy storage devices. Among them, vacuum tube solar water heaters mainly consist of three parts: heat collecting tubes, water storage tanks, and brackets. The heat collecting tubes are usually located below the water storage tank.

[0003] In terms of physical properties, liquid water follows the rule that the higher the temperature, the lower the density within a certain temperature range (such as above room temperature). Based on this property, when the cold water in the collector tube is heated, its density decreases and it floats to the water tank, while the relatively cold water in the water tank sinks to the collector tube, thus forming a convection cycle of hot and cold water. However, this convection cycle also brings a significant problem - the stratification of hot and cold water in the water tank. The stratification of hot and cold water in the water tank will cause a series of adverse consequences. In terms of hot water supply, it will lead to unstable hot water supply, which is specifically manifested in the outlet water temperature being hot and cold. In terms of system efficiency, stratification will increase the water temperature difference and increase the heat loss of the upper hot water; at the same time, it will also affect the efficiency of the collector, resulting in abnormal water temperature at the collector outlet, thereby reducing the operating efficiency of the entire solar water heating system. To this end, we propose a solar energy storage device. Summary of the Invention

[0004] To solve the above technical problems, an embodiment of the present application provides a solar energy storage device, including a solar water heater main body, the solar water heater main body including a bracket, a water tank and a heat collecting pipe connected to the water tank provided on the bracket, and also including a hollow rotating shaft rotatably provided on the water tank, and the hollow rotating shaft passes through the water tank, a plurality of stirring blades are evenly and equidistantly provided on the hollow rotating shaft, a driving assembly connected to the hollow rotating shaft is provided on the water tank, for driving the plurality of stirring blades to rotate and mix the water in the water tank, an angle switching assembly connected to the plurality of stirring blades is provided on the hollow rotating shaft, for driving the stirring blades to perform angle deflection switching when the hollow rotating shaft rotates, so that the upper and lower layers of water in the water tank can flow, and the flow directions are opposite to form a circulation.

[0005] In some embodiments, the angle switching assembly includes multiple shafts rotatably connected to a hollow rotating shaft, both ends of the shafts are fixed to the stirring blades, a rectangular sliding sleeve is fixedly connected to the hollow rotating shaft, a push plate is provided in the hollow rotating shaft and slides through the multiple rectangular sliding sleeves, and a linkage is provided between the push plate and the multiple shafts, for driving the multiple shafts to rotate when the push plate is moved;

[0006] A driving member connected to the push plate is provided on the water tank, which is used to drive the push plate to move and drive the stirring blade to deflect when the stirring blade switches levels.

[0007] In some embodiments, the drive assembly includes an outer gear ring fixedly connected to one end of the hollow rotating shaft, a drive motor is fixedly connected to the water tank, and a gear disk engaged with the outer gear ring is fixedly connected to the output shaft of the drive motor. Starting the drive motor drives the hollow rotating shaft to rotate.

[0008] In some embodiments, the linkage member includes a circular ring fixedly connected to shaft one, a deflection plate fixedly connected to the circular ring, a sliding groove provided on the push plate, and shaft two fixedly connected to the deflection plate with one end sliding through the sliding groove. Moving the push plate drives shaft one to rotate.

[0009] In some embodiments, the driving member includes an L-shaped plate fixedly connected to one end of the push plate, one end of the L-shaped plate is rotatably connected to shaft three, a hollow column is fixedly connected to the water tank, a guide groove member is provided on the hollow column, one end of the shaft three is located in the guide groove member, and is used to drive shaft three to slide along the guide groove member when the hollow shaft rotates, thereby driving the push plate to move.

[0010] In some embodiments, the guide groove member includes an arc-shaped guide groove 1 opened on a hollow column, one end of the shaft 3 is located in the arc-shaped guide groove 1 and is slidably connected to its inner wall, an arc-shaped guide groove 2 is opened on the hollow column, and two threaded guide grooves are opened on the hollow column, and the two threaded guide grooves correspondingly connect the two ends of the arc-shaped guide groove 1 and the arc-shaped guide groove 2.

[0011] In some embodiments, one end of the push plate is fixedly connected to a sliding rod, and a circular plate is fixedly connected to the sliding rod. Both ends of the circular plate are fixedly connected to springs sleeved on the sliding rod, and two limit plates are fixedly connected to the inner wall of the hollow rotating shaft. The sliding rod slides through the limit plates, and one end of the two springs contacts and abuts against the two limit plates respectively, so as to compress the spring on one side of the circular plate when the moving push plate drives the stirring blade to deflect and tilt, so as to provide it with a self-restoring elastic force;

[0012] Two right-angled trapezoidal notches are provided on the hollow column, and the two right-angled trapezoidal notches are connected to the arc guide groove 1 and the arc guide groove 2 respectively. When the stirring blade rotates to the heat collection pipe mouth, the spring reset is used to drive the shaft 3 to move into the right-angled trapezoidal notch to drive the stirring blade to deflect and reset.

[0013] In some embodiments, a photoresistor sensor electrically connected to the drive motor controller is installed on the water tank.

[0014] In some embodiments, two temperature sensors electrically connected to the drive motor controller are installed in the water tank.

[0015] In some embodiments, one end of the push plate is fixedly connected to a rotating ring, an electric push rod is fixedly connected to the water tank, the extended end of the electric push rod is fixedly connected to a connecting plate, one end of the connecting plate is fixedly connected to an axis four that is rotatably connected to the rotating ring, and the electric push rod is started to drive the push plate to move.

[0016] The present invention has at least the following beneficial effects:

[0017] This device uses a driving component to drive the stirring blade to rotate to achieve mixing of the water in the water tank. During the rotation of the stirring blade, the angle switching component is used to drive the stirring blade to switch the angle, causing the upper water in the water tank to flow from left to right and the lower water to flow from right to left, thereby forming a circulating convection. This design can effectively avoid the stratification of cold and hot water in the water tank, while ensuring that the water temperatures at the left and right ends of the water tank tend to be consistent, significantly improving the balance of the water temperature in the water tank. In addition, the rotation process of the stirring blade can also reduce the possibility of scale condensation.

[0018] When the stirring blade of this device rotates to the position of the heat collecting tube, it will actively control the stirring blade to deflect back to the normal position. In this way, it can avoid directly stirring the water at the heat collecting tube and reduce the interference with the heat convection process between the water in the heat collecting tube and the water in the water storage tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of Example 1 of the present invention;

[0020] Figure 2 For the present invention Figure 1 Schematic diagram of the local cross-section structure;

[0021] Figure 3 For the present invention Figure 2 Schematic diagram of the structure of the middle A area;

[0022] Figure 4 For the present invention Figure 2 Schematic diagram of the local cross-section structure;

[0023] Figure 5 For the present invention Figure 4 Schematic diagram of the structure of the middle B area;

[0024] Figure 6 For the present invention Figure 4 Schematic diagram of the local cross-section structure;

[0025] Figure 7 For the present invention Figure 6 Schematic diagram of the structure of the middle C area;

[0026] Figure 8 For the present invention Figure 6 Schematic diagram of explosion structure;

[0027] Figure 9 This is a structural diagram of embodiment 2 of the present invention;

[0028] Figure 10 For the present invention Figure 9 Schematic diagram of the structure of the middle D area.

[0029] In the figure: 1-solar water heater body; 11-bracket; 12-water storage tank; 13-heat collecting tube; 2-hollow shaft; 3-stirring blade; 4-driving assembly; 5-angle switching assembly; 51-axis 1; 52-rectangular sliding sleeve; 53-push plate; 54-linkage member; 55-driving member; 56-external gear ring; 57-driving motor; 58-gear disc; 59-circular ring; 61-deflection plate; 62-chute; 63 -Axis 2; 64 - L-shaped plate; 65 - Axis 3; 66 - Hollow column; 67 - Guide groove piece; 68 - Arc guide groove 1; 69 - Arc guide groove 2; 71 - Threaded guide groove; 72 - Sliding rod; 73 - Circular plate; 74 - Spring; 75 - Limiting plate; 76 - Right-angle trapezoidal notch; 77 - Photoresistor sensor; 78 - Temperature sensor; 79 - Rotating ring; 81 - Electric push rod; 82 - Connecting plate; 83 - Axis 4. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] Example 1: Please refer to Figures 1-8 The present invention provides a technical solution: a solar energy storage device, including a solar water heater body 1, the solar water heater body 1 including a bracket 11, a water tank 12 provided on the bracket 11, and a heat collecting pipe 13 connected to the water tank 12, and further including:

[0032] A hollow rotating shaft 2 is rotatably disposed on the water tank 12 and passes through the water tank 12;

[0033] Multiple mixing blades 3 are evenly and equidistantly arranged on the hollow rotating shaft 2. A drive assembly 4 connected to the hollow rotating shaft 2 is provided on the water storage tank 12. The drive assembly 4 includes an outer gear ring 56 fixedly connected to one end of the hollow rotating shaft 2. A drive motor 57 is fixedly connected to the water storage tank 12. A gear disk 58 meshing with the outer gear ring 56 is fixedly connected to the output shaft of the drive motor 57. When the drive motor 57 is started, the gear disk 58 is driven to rotate, thereby driving the outer gear ring 56 and the hollow rotating shaft 2 to rotate, which is used to drive the multiple mixing blades 3 to rotate and mix the water in the water storage tank 12;

[0034] An angle switching assembly 5 is provided on the hollow shaft 2 and connected to the plurality of stirring blades 3. When the hollow shaft 2 rotates, the stirring blades 3 are driven to switch angles, so that the upper and lower layers of water in the water storage tank 12 can flow in opposite directions and form a circulation;

[0035] Specifically, the device drives the stirring blade 3 to rotate with the help of the driving component 4 to achieve mixing of the water in the water tank 12. During the rotation of the stirring blade 3, the angle switching component 5 is used to drive the stirring blade 3 to switch the angle, so as to cause the upper water body of the water tank 12 to flow from left to right and the lower water body to flow from right to left, thereby forming a circular convection. This design can effectively avoid the stratification of cold and hot water in the water tank 12, while ensuring that the water temperature at the left and right ends of the water tank 12 tends to be consistent, significantly improving the balance of the water temperature in the water tank 12. In addition, the rotation process of the stirring blade 3 can also reduce the possibility of scale condensation.

[0036] At the same time, when the stirring blade 3 rotates to the position of the heat collecting pipe 13, the device will actively control the stirring blade 3 to deflect back to the normal position. In this way, it can avoid directly stirring the water at the heat collecting pipe 13 and reduce the interference with the heat convection process between the water in the heat collecting pipe 13 and the water in the water storage tank 12.

[0037] The angle switching assembly 5 includes a plurality of shafts 51 rotatably connected to the hollow rotating shaft 2, both ends of the shaft 51 are fixedly connected to the stirring blade 3, a rectangular sliding sleeve 52 is fixedly connected to the hollow rotating shaft 2, a push plate 53 is provided in the hollow rotating shaft 2, and the push plate 53 slides through the plurality of rectangular sliding sleeves 52 in sequence, and a linkage member 54 is provided between the push plate 53 and the plurality of shafts 51, and the linkage member 54 includes a circular ring 59 fixedly connected to the shaft 1 51, a deflection plate 61 is fixedly connected to the circular ring 59, a sliding groove 62 is provided on the push plate 53, and a shaft 2 63 with one end sliding through the sliding groove 62 is fixedly connected to the deflection plate 61. Specifically, by moving the push plate 53, the sliding groove 62 is used to push the shaft 2 63, thereby driving the deflection plate 61 and the circular ring 59 to deflect, thereby driving the shaft 1 51 to rotate, thereby driving the stirring blade 3 to switch the angle;

[0038] A driving member 55 connected to the push plate 53 is provided on the water tank 12 for driving the push plate 53 to move and drive the stirring blade 3 to deflect and switch when the stirring blade 3 switches the level.

[0039] One end of the water tank 12 is fixedly connected to a protective shell, and the drive motor 57, the outer gear ring 56, and the gear disc 58 are all located in the protective shell.

[0040] The driving member 55 includes an L-shaped plate 64 fixedly connected to one end of the push plate 53, and one end of the L-shaped plate 64 is rotatably connected to a third shaft 65. A hollow column 66 is fixedly connected to the water tank 12, and a guide groove member 67 is provided on the inner wall of the hollow column 66. One end of the third shaft 65 is located in the guide groove member 67, which is used to drive the third shaft 65 to slide along the guide groove member 67 when the hollow rotating shaft 2 rotates, thereby driving the push plate 53 to move.

[0041] The guide groove member 67 includes an arcuate guide groove 1 68 provided on the hollow column 66. One end of the shaft 3 65 is located in the arcuate guide groove 1 68 and is slidably connected to the inner wall thereof. The hollow column 66 is provided with an arcuate guide groove 2 69. The arcuate guide groove 1 68 and the arcuate guide groove 2 69 are located at different positions on the axis of the hollow column 66. The hollow column 66 is provided with two threaded guide grooves 71. The two threaded guide grooves 71 respectively connect the ends of the arcuate guide groove 1 68 and the arcuate guide groove 2 69 and connect the arcuate guide groove 2 69 with the arcuate guide groove 1 68.

[0042] Specifically, when the driving motor 57 drives the hollow shaft 2 to rotate, it will drive the shaft three 65 located on the push plate 53 to rotate with the hollow shaft 2 as the axis. During this process, the shaft three 65 will slide along the arc guide groove 1 68, the threaded guide groove 71, the arc guide groove 2 69 and another section of the threaded guide groove 71 in sequence, forming a circular rotation. Whenever the shaft three 65 passes through the spiral guide groove, it will drive the push plate 53 to displace, and then drive the stirring blade 3 to deflect and switch, so that when the stirring blade 3 is in the upper layer, its deflected state can push the water to flow from left to right; when the stirring blade 3 is in the lower layer, its deflected state can push the water to flow from right to left.

[0043] One end of the push plate 53 is fixedly connected to a slide rod 72, and a circular plate 73 is fixedly connected to the slide rod 72. Both ends of the circular plate 73 are fixedly connected to springs 74 sleeved on the slide rod 72, and two limit plates 75 are fixedly connected to the inner wall of the hollow rotating shaft 2. The slide rod 72 slides through the limit plates 75, and one end of the two springs 74 contacts and abuts against the two limit plates 75. When the moving push plate 53 drives the stirring blade 3 to deflect and tilt, the spring 74 on one side of the circular plate 73 is compressed to provide it with a self-restoring elastic force;

[0044] Two right-angled trapezoidal notches 76 are provided on the hollow column 66, and the two right-angled trapezoidal notches 76 are connected to the arc guide groove 1 68 and the arc guide groove 2 69 respectively. When the stirring blade 3 rotates to the mouth of the heat collecting pipe 13, the spring 74 is used to reset and drive the push plate 53 to move. At the same time, the shaft 3 65 also moves into the right-angled trapezoidal notch 76 to drive the stirring blade 3 to deflect and reset, that is, the stirring blade 3 will deflect back to the normal position. In this way, it can avoid directly stirring the water at the heat collecting pipe 13, reducing the interference with the heat convection process between the water in the heat collecting pipe 13 and the water in the water storage tank 12. Subsequently, when the stirring blade 3 rotates past the heat collecting pipe 13, the shaft 3 65 also returns to the arc guide groove 1 68 or the arc guide groove 2 69 along the inclined piece of the right-angled trapezoidal notch 76, and the stirring blade 3 is also deflected and tilted again;

[0045] It should be noted that the deflection of the stirring blade 3 means that the stirring blade 3 is perpendicular to the axis of the hollow rotating shaft 2. When the stirring blade 3 is in this state, rotating the hollow rotating shaft 2 drives the stirring blade 3 to rotate. At this time, the stirring blade 3 will hardly push the water to move along the axis direction of the hollow rotating shaft 2.

[0046] A photoresistor sensor 77 electrically connected to the drive motor 57 controller is installed on the water tank 12. The photoresistor sensor 77 can be used to monitor the intensity of external sunlight in real time. Specifically, when the sunlight intensity is high, the solar water heater collector tube 13 absorbs more heat and the temperature rises rapidly. At this time, the water temperature difference at different positions in the water tank 12 increases, and the possibility of stratification also increases. In this case, the drive motor 57 can be controlled by a preset program to start and rotate intermittently, driving the stirring blade 3 to stir the water in the water tank 12 to promote water mixing and reduce stratification.

[0047] Two temperature sensors 78 electrically connected to the controller of the drive motor 57 are installed in the water tank 12. These two temperature sensors 78 are used to detect the temperatures of the upper and lower layers of water in the water tank 12 in real time. When there is a significant temperature difference between the two, the drive motor 57 can be controlled by a preset program to start and rotate intermittently, driving the stirring blades 3 to stir the water in the water tank 12 to promote water mixing and reduce stratification.

[0048] Example 2: Please refer to Figure 9-10 The present invention provides a technical solution: Example 2 is another specific implementation of the driving member 55 in Example 1:

[0049] One end of the push plate 53 is fixedly connected to a rotating ring 79, and an electric push rod 81 is fixedly connected to the water tank 12. The extended end of the electric push rod 81 is fixedly connected to a connecting plate 82, and one end of the connecting plate 82 is fixedly connected to a shaft four 83 that is rotatably connected to the rotating ring 79. Starting the electric push rod 81 drives the connecting plate 82 to move, thereby driving the shaft four 83 and the rotating ring 79 to move, thereby driving the push plate 53 to move.

[0050] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0051] While the embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that various changes, modifications, substitutions, and alterations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A solar energy storage device, comprising a solar water heater body (1), the solar water heater body (1) comprising a bracket (11), a water storage tank (12) provided on the bracket (11), and a heat collecting pipe (13) connected to the water storage tank (12), characterized in that: Also included are: A hollow rotating shaft (2) is rotatably mounted on the water storage tank (12) and penetrates the water storage tank (12); A plurality of stirring blades (3) are evenly and equidistantly arranged on the hollow rotating shaft (2); a driving assembly (4) connected to the hollow rotating shaft (2) is provided on the water storage tank (12) for driving the plurality of stirring blades (3) to rotate and mix the water in the water storage tank (12); An angle switching assembly (5) is arranged on the hollow rotating shaft (2) and connected to the plurality of stirring blades (3), and is used to drive the stirring blades (3) to switch angles when the hollow rotating shaft (2) rotates, so that the upper and lower layers of water in the water storage tank (12) can flow in opposite directions and form a circulation.

2. The solar energy storage device according to claim 1, characterized in that: The angle switching assembly (5) includes a plurality of shafts (51) rotatably connected to a hollow rotating shaft (2), both ends of the shafts (51) are fixed to the stirring blades (3), a rectangular sliding sleeve (52) is fixedly connected to the hollow rotating shaft (2), a push plate (53) is provided in the hollow rotating shaft (2) and slides through the plurality of rectangular sliding sleeves (52), and a linkage (54) is provided between the push plate (53) and the plurality of shafts (51) for driving the plurality of shafts (51) to rotate when the push plate (53) is moved; A driving member (55) connected to the push plate (53) is provided on the water storage tank (12) and is used to drive the push plate (53) to move when the stirring blade (3) switches levels, thereby driving the stirring blade (3) to deflect.

3. The solar energy storage device according to claim 1, characterized in that: The driving assembly (4) comprises an outer gear ring (56) fixedly connected to one end of the hollow rotating shaft (2); a driving motor (57) is fixedly connected to the water storage tank (12); a toothed disc (58) meshing with the outer gear ring (56) is fixedly connected to the output shaft of the driving motor (57); and the driving motor (57) is started to drive the hollow rotating shaft (2) to rotate.

4. The solar energy storage device according to claim 2, characterized in that: The linkage member (54) includes a ring (59) fixedly connected to the first shaft (51), a deflection plate (61) fixedly connected to the ring (59), a sliding groove (62) provided on the push plate (53), and a second shaft (63) fixedly connected to the deflection plate (61) with one end sliding through the sliding groove (62). Moving the push plate (53) drives the first shaft (51) to rotate.

5. The solar energy storage device according to claim 4, characterized in that: The driving member (55) includes an L-shaped plate (64) fixedly connected to one end of the push plate (53), one end of the L-shaped plate (64) is rotatably connected to a third shaft (65), a hollow column (66) is fixedly connected to the water storage tank (12), a guide groove member (67) is provided on the hollow column (66), and one end of the third shaft (65) is located in the guide groove member (67) and is used to drive the third shaft (65) to slide along the guide groove member (67) when the hollow shaft (2) rotates, thereby driving the push plate (53) to move.

6. The solar energy storage device according to claim 5, characterized in that: The guide groove member (67) includes an arc guide groove 1 (68) provided on the hollow column (66), one end of the shaft 3 (65) is located in the arc guide groove 1 (68) and is slidably connected to the inner wall thereof, an arc guide groove 2 (69) is provided on the hollow column (66), and two thread guide grooves (71) are provided on the hollow column (66), and the two thread guide grooves (71) respectively connect the two ends of the arc guide groove 1 (68) and the arc guide groove 2 (69).

7. The solar energy storage device according to claim 6, characterized in that: One end of the push plate (53) is fixedly connected to a slide rod (72), and a circular plate (73) is fixedly connected to the slide rod (72). Both ends of the circular plate (73) are fixedly connected to springs (74) sleeved on the slide rod (72), and two limit plates (75) are fixedly connected to the inner wall of the hollow rotating shaft (2). The slide rod (72) slides through the limit plates (75), and one end of the two springs (74) contacts and abuts against the two limit plates (75) to compress the spring (74) on one side of the circular plate (73) when the moving push plate (53) drives the stirring blade (3) to deflect and tilt, so as to provide a self-restoring elastic force for it. Two right-angled trapezoidal notches (76) are provided on the hollow column (66), and the two right-angled trapezoidal notches (76) are connected to the arc guide groove 1 (68) and the arc guide groove 2 (69) respectively, and are used to drive the shaft 3 (65) to move into the right-angled trapezoidal notch (76) by using the spring (74) to reset when the stirring blade (3) rotates to the mouth of the heat collecting tube (13), so as to drive the stirring blade (3) to deflect and reset.

8. The solar energy storage device according to claim 7, characterized in that: A photoresistor sensor (77) electrically connected to a controller of a drive motor (57) is mounted on the water storage tank (12).

9. The solar energy storage device according to claim 7, characterized in that: Two temperature sensors (78) electrically connected to the controller of the drive motor (57) are installed in the water storage tank (12).

10. The solar energy storage device according to claim 4, characterized in that: One end of the push plate (53) is fixedly connected to a rotating ring (79), and an electric push rod (81) is fixedly connected to the water tank (12). The extended end of the electric push rod (81) is fixedly connected to a connecting plate (82). One end of the connecting plate (82) is fixedly connected to a shaft (83) that is rotatably connected to the rotating ring (79). When the electric push rod (81) is started, the push plate (53) is driven to move.

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