Floating photovoltaic array displacement buffer

Abstract

This application provides a floating photovoltaic subarray displacement buffer, relating to the field of floating photovoltaic equipment. It includes a buffer body, a surface connection mechanism, and an underwater connection mechanism. The buffer body includes an inner buffer tube, a mooring ring, and a pulley system. Two axially extending tie rods are provided on the inner side of the inner buffer tube, and springs are fitted on the outer sides of the tie rods. One end of each tie rod has a movable plate, and the other end extends to the outer side of the inner buffer tube. One side of the mooring ring is connected to the surface connection mechanism, and the other side is connected to the end of one tie rod located outside the inner buffer tube. One side of the pulley system is connected to the underwater connection mechanism, and the other side is connected to the end of another tie rod located outside the inner buffer tube. This application features improved connection effectiveness between the floating frame and the anchor pile.

Description

Technical Field

[0001] This application relates to the field of floating photovoltaic equipment, and in particular to displacement buffers for floating photovoltaic subarrays. Background Technology

[0002] In recent years, with the continuous development of my country's photovoltaic industry, the scarcity of land resources has become a major factor restricting the development of photovoltaic power plants. Against this backdrop, floating photovoltaic power plants have become a hot topic. Because the construction of floating photovoltaic power plants is affected by external environmental factors such as water level changes and strong winds, the design of the anchoring connection system for the photovoltaic subarrays needs to consider a certain range of floating movement to ensure that the photovoltaic subarrays are in a reliable anchoring connection state, thereby ensuring the stable operation of the floating photovoltaic power plant.

[0003] Currently, the anchoring connection of photovoltaic subarrays generally adopts the direct connection method of steel wire rope, that is, one end of the steel wire rope is connected to the anchor pile or anchor block of the photovoltaic subarray (located underwater), while the other end of the steel wire rope is connected to the float or outer support of the photovoltaic subarray (located above water).

[0004] When photovoltaic subarrays float up and down or shift left and right due to water level or wind, the poor ductility of the wire ropes means that only the reserved length of the wire ropes can limit the floating and shifting of the subarrays. However, this method can lead to fatigue failure of the connection between the wire rope and the anchor pile or the wire rope and the float. Moreover, if the photovoltaic subarray is affected by a sudden wind force, causing horizontal displacement, the wire ropes will tense up instantly, increasing the instantaneous stress on the anchoring system connection points and making them prone to damage. Increasing the number of wire ropes can improve the connection effect, but the number of anchor piles or anchor blocks that need to be laid will also increase, thus increasing project costs and hindering large-scale promotion. Summary of the Invention

[0005] To improve the poor anchoring effect caused by using direct steel wire rope connection, this application provides a displacement buffer for floating photovoltaic subarrays.

[0006] This application provides a displacement buffer for a floating photovoltaic subarray, employing the following technical solution:

[0007] A floating photovoltaic subarray displacement buffer includes a buffer body, a surface connection mechanism, and an underwater connection mechanism;

[0008] The above-water connection mechanism connects the floating frame used to install the photovoltaic subarray to the buffer body, and the underwater connection mechanism connects the buffer body to the anchor pile.

[0009] By adopting the above technical solution, the floating frame, the buffer body, and the anchor pile form a whole under the connection of the above-water connection mechanism and the underwater connection mechanism. In this way, when the floating frame sways, the buffer body can buffer the interaction force between the floating frame and the anchor pile, thereby ensuring that the floating frame can be reliably connected to the anchor pile.

[0010] Optionally, the buffer body includes an inner buffer tube, an anchor ring, and a pulley assembly. The inner side of the inner buffer tube is provided with two axially extending tie rods, and the outer side of the tie rods is fitted with springs. One end of the tie rod is provided with a movable plate, and the other end of the tie rod extends to the outer side of the inner buffer tube.

[0011] One side of the mooring ring is connected to the above-water connection mechanism, and the other side of the mooring ring is connected to one end of a tie rod located outside the inner buffer tube. One side of the pulley block is connected to the underwater connection mechanism, and the other side of the pulley block is connected to one end of another tie rod located outside the inner buffer tube.

[0012] By adopting the above technical solution, when the floating frame sways and moves away from the anchor pile, it will drive the water connection mechanism to pull the corresponding tie rod upward, so that the tie rod can move towards the outside of the buffer inner tube. During this process, the spring on the outside of the tie rod will be in a compressed state. When the spring is fully compressed, the tie rod will pull the buffer inner tube to produce displacement. At the same time, the other tie rod will also produce displacement with the buffer inner tube. That is to say, the other tie rod will move towards the outside of the buffer inner tube and the spring on the outside of the other tie rod will also be in a compressed state. In this way, the buffering effect is achieved through the displacement of the two tie rods and the compression of the two springs, ensuring the reliable connection between the floating frame and the anchor pile.

[0013] Optionally, one end of the spring is connected to the side wall of the inner buffer tube, and the other end of the spring is connected to the side wall of the movable plate.

[0014] An opening is provided on the outer wall of the inner buffer tube, and a pair of limiting rings are provided at intervals in the middle of the inner wall of the inner buffer tube. The opening is located between the pair of limiting rings, and water enters and exits the inner buffer tube through the opening.

[0015] By adopting the above technical solution, a distance exists between the outer wall of the movable plate and the inner wall of the buffer inner tube. Under the connection and limiting action of the movable plate, the spring can be reliably compressed, thereby playing a buffering role. The opening allows the buffer inner tube to be connected to the external water body. Thus, when the displacement speed of the pull rod is relatively fast, the water inside the buffer inner tube can be discharged through the opening, and external water can also smoothly enter the interior of the buffer inner tube. The limiting ring restricts the extension of the spring, preventing excessive retraction of the pull rod and overstretching of the spring.

[0016] Optionally, a limiting block is provided on the outer wall of the pull rod, the limiting block is located inside the spring, and the limiting block is close to the movable plate.

[0017] By adopting the above technical solution, the limiting block can limit the displacement of the pull rod, ensuring that the spring is in a partially compressed state after the pull rod is limited, thus preventing the spring from being over-compressed.

[0018] Optionally, the pulley block includes a fixed pulley and a suspended pulley. The fixed pulley is connected to the buffer inner tube by a connecting rod. The fixed pulley is provided with a clamp in the middle. The end of the pull rod is locked between the two vertical pieces of the clamp by bolts.

[0019] The fixed pulley and the suspended pulley are connected by a pair of ring cables, which are wound around the outside of the fixed pulley and the suspended pulley.

[0020] By adopting the above technical solution, the fixed pulley is fixedly connected to the buffer inner tube through the connecting rod, and the suspended pulley is movably connected to the fixed pulley through a pair of ring cables. At the same time, under the locking action of the clamp, the relative position between the pull rod and the fixed pulley is fixed.

[0021] Optionally, the underwater connection mechanism includes a cable-stayed cable and a collar. Each end of the cable-stayed cable is connected to a collar. One collar is fitted and fixed to an anchor pile, and the other collar drives the cable-stayed cable to pass over the suspended pulley and then fits and is fixed to another anchor pile.

[0022] By adopting the above technical solution, both ends of the inclined steel cable are connected to the anchor piles through collars, and the middle of the inclined steel cable passes over the suspended pulley. In this way, the tension generated on the above-water connection mechanism when the floating frame moves will be distributed at both ends of the inclined steel cable, thereby reducing the tension on a single anchor pile, thus improving the overall stability and effectively preventing the above-water connection structure or underwater connection mechanism from breaking.

[0023] Optionally, a pair of the ring cables are located on both sides of the cable-stayed cable, and a screw is threaded through the middle of the ring cable. A nut is adapted to be screwed on the screw, and the nut rotates on the screw to tighten the ring cable.

[0024] By adopting the above technical solution, when the nut rotates continuously on the screw, the middle part of the ring cable will be gradually tightened, so that the ring cable can be reliably set between the fixed pulley and the suspended pulley.

[0025] Optionally, the water connection mechanism includes a connecting seat and an anchoring cable. The connecting seat is located on the float and has a roller. One end of the anchoring cable is wound around the roller, and the other end of the anchoring cable is connected to the mooring ring.

[0026] By adopting the above technical solution, the connecting seat is fixedly connected to the floating frame, and the anchoring steel cable is wound around the roller, so that the release length of the anchoring steel cable is adjustable, and thus can be adjusted in time when the water level changes significantly.

[0027] Optionally, the connecting seat is further provided with a slide rod, which is located below the roller and is arranged parallel to the roller;

[0028] The slide bar is provided with a slider, which can slide along the axial direction of the slide bar. The slider is provided with a through hole extending radially along the slide bar, and the anchoring steel cable passes through the through hole and extends downward.

[0029] By adopting the above technical solution, after the anchoring steel cable passes through the perforation, the slider can limit the anchoring steel cable, prevent the anchoring steel cable from shaking excessively, and minimize the wear of the anchoring steel cable.

[0030] Optionally, the inner diameter of the perforation is larger than the outer diameter of the anchoring cable, and the anchoring cable is provided with a tapered sleeve located below the perforation. The maximum outer diameter of the tapered sleeve is larger than the inner diameter of the perforation, and the minimum outer diameter of the tapered sleeve is smaller than the inner diameter of the perforation.

[0031] The slide bar is also provided with a stop block, which is used to block the slide block.

[0032] By adopting the above technical solution, the inner diameter of the perforation is relatively large, allowing the anchoring steel cable to sway within a small range. Furthermore, the stop block restricts the sliding range of the slider, ensuring that the anchoring steel cable can drive the slider to move. When the distance between the floating frame and the anchor pile decreases, the conical sleeve inserts into the perforation, limiting the axial movement of the anchoring steel cable.

[0033] In summary, this application includes at least one of the following beneficial effects:

[0034] 1. When the floating frame undergoes horizontal or vertical displacement, the two springs inside the buffer body will be in a corresponding stretched or compressed state, thereby buffering the tension generated by the floating frame displacement on the anchor pile and ensuring that the floating frame can be reliably anchored.

[0035] 2. After the tension of the floating frame on the anchoring steel cable is transmitted to the suspended pulley, it will form two opposing forces through the inclined steel cable. Each opposing force is less than the tension on the suspended pulley, which reduces the tension on a single anchor pile and thus improves the reliability of the connection between the floating frame and the anchor pile. Attached Figure Description

[0036] Figure 1 This is a schematic perspective view of this application;

[0037] Figure 2 This is a reference diagram showing the usage status of this application;

[0038] Figure 3 It is a schematic 3D diagram of the water connection mechanism;

[0039] Figure 4 This is a schematic three-dimensional view of the buffer body;

[0040] Figure 5 This is a schematic diagram of the internal structure of the buffer body;

[0041] In the diagram: 1. Buffer body; 11. Inner buffer tube; 111. Tie rod; 112. Spring; 113. Movable plate; 114. Opening; 115. Limiting ring; 116. Limiting block; 12. Anchor ring; 13. Pulley block; 131. Fixed pulley; 132. Suspended pulley; 133. Connecting rod; 134. Clamp; 1340. Bolt; 135. Ring cable; 1351. Screw; 1352. Nut;

[0042] 2. Waterborne connection mechanism; 21. Connecting seat; 211. Roller; 212. Slide rod; 2120. Stop block; 213. Sliding block; 2130. Perforation; 22. Anchoring steel cable; 220. Conical sleeve;

[0043] 3. Underwater connection mechanism; 31. Cable guide cable; 32. Loop;

[0044] 4. Floating frame; 40. Photovoltaic sub-array; 5. Anchor piles. Detailed Implementation

[0045] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0046] Figure 1 This is a schematic perspective view of this application. Figure 2 This is a reference diagram showing the usage status of this application. See also... Figure 1 and Figure 2 The floating photovoltaic subarray displacement buffer includes a buffer body 1, an above-water connection mechanism 2 and an underwater connection mechanism 3. The buffer body 1 is located underwater, and the floating frame 4 for installing the photovoltaic subarray 40 is located above the water. The floating frame 4, the above-water connection mechanism 2, the buffer body 1, the underwater connection mechanism 3 and the anchor pile 5 are connected in sequence.

[0047] A buffer body 1 is installed between the floating frame 4 and the anchor pile 5. When the floating frame 4 is affected by factors such as water level changes or wind force changes and undergoes horizontal or vertical displacement, the buffer body 1 will buffer the connection between the above-water connection mechanism 2 and the underwater connection mechanism 3, thereby effectively improving the connection reliability between the floating frame 4 and the anchor pile 5.

[0048] Figure 3 This is a schematic 3D diagram of the water-based connection mechanism. See also... Figure 3 The water-based connection mechanism 2 includes a connecting seat 21 and an anchoring cable 22. The connecting seat 21 consists of a pair of plates fixedly mounted on the float 4. A roller 211 is mounted on the connecting seat 21 (i.e., the roller 211 is positioned between the pair of plates). One end of the anchoring cable 22 is fixed and wound around the roller, and the other end of the anchoring cable 22 is connected to the buffer body 1. A sliding rod 212 is mounted on the connecting seat 21 and located below the roller 211. The sliding rod 212 is aligned with the roller 211. A slider 213 is mounted on the sliding rod 212, and the slider 213 is slidably connected to the sliding rod 212, meaning the slider 213 can slide smoothly on the sliding rod 212. A through hole 2130 is provided on the slider 213, and the axis of the through hole 2130 is perpendicular to the axis of the sliding rod 212. The anchoring cable 22 is connected to the buffer body 1 after passing through the through hole 2130. A tapered sleeve 220 is fixed on the anchoring steel cable 22. The tapered sleeve 220 is located below the through hole 2130. The inner diameter of the through hole 2130 is larger than the outer diameter of the anchoring steel cable 22. The maximum outer diameter of the tapered sleeve 220 is larger than the inner diameter of the through hole 2130. The minimum outer diameter of the tapered sleeve 220 is smaller than the inner diameter of the through hole 2130.

[0049] One end of the anchoring cable 22 is connected to one end of the roller 211, and then the anchoring cable 22 is wound around the roller 211. When the anchoring cable 22 is close to the other end of the roller 211, the winding stops (that is, the anchoring cable 22 is only wound on the outer wall of the roller 211). In this way, after the other end of the anchoring cable 22 is connected to the buffer body 1, when the float 4 shakes, the part of the anchoring cable 22 that is wound off the roller 211 will also shake relatively. The shaking part of the anchoring cable 22 will only rub against the inner wall of the roller 211, which can reduce the wear of the anchoring cable 22.

[0050] Furthermore, when the anchoring cable 22 sways, the anchoring cable 22 will first be displaced within the perforation 2130. After the anchoring cable 22 comes into contact with the inner wall of the perforation 2130, the anchoring cable 22 will drive the slider 213 to be displaced, so that the slider 213 can slide on the slide rod 212. A stop 2120 is also provided on the slide bar 212. The stop 2120 is close to the other end of the roller 211 (that is, the end of the anchor steel cable 22 that is wound out on the roller 211). In this way, it can limit the displacement of the slider 213 in one direction. The limiting effect of the slider 213 in the other direction is achieved by the connecting seat 21. Under the limiting effect of the connecting seat 21 and the stop 2120, the displacement of the slider 213 is limited. By limiting the displacement of the slider 213, the swaying angle of the anchor steel cable 22 at the roller 211 can be controlled, further preventing the wound anchor steel cable 22 from rubbing against the anchor steel cable 22 wound on the roller 211, and significantly reducing the wear of the anchor steel cable 22 during horizontal swaying.

[0051] See Figure 2 and Figure 3 When the anchor cable 22 floats vertically, the conical sleeve 220 will either insert upward into the through hole 2130 or pull downward out of the through hole 2130. That is, the conical sleeve 220 will adjust between two states: an interference fit with the through hole 2130 and a separation from the through hole 2130. When the conical sleeve 220 is inserted into the through hole 2130 and has an interference fit with the through hole 2130, the anchor cable 22 cannot move upward toward the slider 213. This prevents the anchor cable 22 from moving excessively upward toward the slider 213 when the distance between the float 4 and the anchor pile 5 shortens. This ensures that the anchor cable 22 on the roller 211 can be reliably wound, thereby providing sufficient tension when the distance between the float 4 and the anchor pile 5 increases.

[0052] See Figure 2 The underwater connection mechanism 3 includes a cable-stayed steel cable 31 and a collar 32. Both ends of the cable-stayed steel cable 31 are connected to a collar 32. One collar 32 is fitted and fixed on an anchor pile 5, and the other collar 32 is fitted and fixed on another anchor pile 5.

[0053] Figure 4 This is a schematic 3D view of the buffer body. Figure 5 This is a schematic diagram of the internal structure of the buffer body. See also... Figure 4 and Figure 5The buffer body 1 includes an inner buffer tube 11, an anchor ring 12, and a pulley block 13. Two pull rods 111 are provided inside the inner buffer tube 11, with their axes coinciding with the axis of the inner buffer tube 11. One end of each pull rod 111 has a movable plate 113, and the other end extends to the outside of the inner buffer tube 11 (i.e., both pull rods 111 are positioned with one end inside the inner buffer tube 11 and the other end outside, and both ends of the pull rods 111 have a movable plate 113 at their inner ends). The two movable plates 113 are spaced apart. A spring 112 is fitted inside the inner buffer tube 11 and outside each of the two pull rods 111. One end of the spring 112 is connected to the side wall of the movable plate 113, and the other end is connected to the side wall of the inner buffer tube 11.

[0054] One side of the mooring ring 12 is connected to the surface connection mechanism 2, i.e., to the anchoring cable 22, and the other side of the mooring ring 12 is connected to the end of the tie rod 111 located above and outside the inner buffer tube 11. One side of the pulley block 13 is connected to the underwater connection mechanism 3, i.e., to the inclined cable 31, and the other side of the pulley block 13 is connected to the end of the tie rod 111 located below and outside the inner buffer tube 11.

[0055] See Figure 4 and combined Figure 2The pulley block 13 includes a fixed pulley 131 and a suspended pulley 132. The fixed pulley 131 is connected to the buffer inner tube 11 through a connecting rod 133. A clamp 134 is provided in the middle of the fixed pulley 131. The end of the pull rod 111 located below passes between the two vertical pieces of the clamp 134 and is locked by bolts 1340. The fixed pulley 131 and the suspended pulley 132 are connected by a pair of ring cables 135. The pair of ring cables 135 are located on both sides of the inclined steel cable 31. A screw 1351 is threaded through the middle of the ring cable 135. A nut 1352 is screwed onto the screw 1351. When the nut 1352 is continuously screwed into the screw 1351, the nut 1352 and the tail of the screw 1351 will clamp the ring cable 135, causing the middle of the ring cable 135 to be concave inward. In this way, the ring cable 135 can reliably clamp the fixed pulley 131 and the suspended pulley 132, preventing the ring cable 135 from falling off the fixed pulley 131 or the suspended pulley 132 when the distance between the fixed pulley 131 and the suspended pulley 132 changes. By setting the ring cable 135, the torsional force generated when the float 4 is displaced in the horizontal or vertical direction will act on the ring cable 135 and cause the ring cable 135 to twist, without twisting at the connection between the tie rod 111 and the fixed pulley 131 or the connecting rod 133 and the fixed pulley 131. This ensures that the fixed pulley 131 can be reliably fixed, while the suspended pulley 132 can generate a certain amount of swaying to buffer the tension generated by the displacement of the float 4.

[0056] See Figure 2 and Figure 5 When the floating frame 4 undergoes horizontal or vertical displacement, causing the distance between the floating frame 4 and the anchor pile 5 to increase, the tension on the anchor steel cable 22 will increase, which will cause the upper tie rod 111 to move towards the outside of the buffer inner tube 11. At the same time, it will drive the movable plate 113 to squeeze, causing the spring 112 sleeved on the outside of the tie rod 111 to deform. During the compression of the spring 112, a certain buffering effect can be formed. After the spring 112 is fully compressed, the anchoring cables 22 continue to pull the rod 111, which will cause the inner buffer tube 11 to shift. This will cause the lower rod 111 to move towards the outside of the inner buffer tube 11. In this way, the spring 112 sleeved on the outside of the rod 111 will also undergo elastic deformation under the compression of the movable plate 113, thus achieving a buffering effect again. Through the sequential deformation of the two springs 112, the pulling effect of the floating frame 4 displacement on the anchor pile 5 can be effectively buffered. In other words, the floating frame 4 can be reliably connected to the anchor pile 5 under the combined action of the above-water connection mechanism 2, the buffer body 1, and the underwater connection mechanism 3.

[0057] Two limiting rings 115 are provided at intervals in the middle of the inner side of the buffer inner tube 11. An opening 114 is provided on the outer wall of the buffer inner tube 11 and between the two limiting rings 115. A limiting block 116 is provided on the outer wall of each of the two pull rods 111. The limiting block 116 is located inside the spring 112 and is close to the movable plate 113. The setting of the limiting ring 115 and the limiting block 116 constitutes the limitation on the maximum stroke of the spring 112 in tension or compression. That is, when the movable plate 113 contacts the limiting ring 115, the tension of the spring 112 reaches its maximum value. When the limiting block 116 contacts the side wall of the buffer inner tube 11, the compression of the spring 112 reaches its maximum value. When the spring 112 reaches the maximum tension limit set by the limiting ring 115, the spring 112 is not in its fully stretched state. When the spring 112 reaches the maximum compression limit set by the limiting block 116, the spring 112 is not in its fully compressed state. In this way, it can be ensured that the spring 112 has sufficient elasticity to achieve the buffering effect of the tension generated by the displacement of the float 4. Meanwhile, the opening 114 allows water inside the buffer inner tube 11 to be discharged through the opening 114 when the movable plate 113 moves quickly, while water from the outside can also enter the inner side of the buffer inner tube 11 through the opening 114, so that the pressure of the water inside the buffer inner tube 11 remains balanced.

[0058] See 2 and Figure 5 When both springs 112 are in a compressed state, the tension of the floating frame 4 on the anchoring steel cable 22 will be transmitted to the fixed pulley 131. Since the inclined steel cable 31 is wrapped around the suspended pulley 132, and the suspended pulley 132 is connected to the fixed pulley 131 by the ring cable 135, and at the same time, the two ends of the inclined steel cable 31 are respectively and correspondingly sleeved and fixed on the two anchor piles 5 (the inclined steel cable 31 is in an inverted V shape), the tension will be transmitted to the two anchor piles 5 through the inclined steel cable 31, thereby reducing the tension value of a single anchor pile 5, and thus significantly improving the connection effect between the floating frame 4 and the anchor pile 5.

[0059] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A displacement buffer for a floating photovoltaic subarray, characterized in that, It includes a buffer body (1), a surface connection mechanism (2), and an underwater connection mechanism (3); The above-water connection mechanism (2) connects the floating frame (4) for installing the photovoltaic sub-array (40) to the buffer body (1), and the underwater connection mechanism (3) connects the buffer body (1) to the anchor pile (5); The buffer body (1) includes a buffer inner tube (11), an anchor ring (12) and a pulley block (13). The inner side of the buffer inner tube (11) is provided with two axially extending tie rods (111). The outer side of the tie rods (111) is fitted with springs (112). One end of the tie rods (111) is provided with a movable plate (113). The other end of the tie rods (111) extends to the outer side of the buffer inner tube (11). One side of the mooring ring (12) is connected to the above-water connection mechanism (2), and the other side of the mooring ring (12) is connected to one end of a pull rod (111) located outside the buffer inner tube (11). One side of the pulley block (13) is connected to the underwater connection mechanism (3), and the other side of the pulley block (13) is connected to one end of another pull rod (111) located outside the buffer inner tube (11). The pulley assembly (13) includes a fixed pulley (131) and a suspended pulley (132). The fixed pulley (131) is connected to the buffer inner tube (11) by a connecting rod (133). A clamp (134) is provided in the middle of the fixed pulley (131). The end of the pull rod (111) is locked between the two vertical pieces of the clamp (134) by a bolt (1340). The fixed pulley (131) and the suspended pulley (132) are connected by a pair of annular cables (135), which are wound around the outside of the fixed pulley (131) and the suspended pulley (132).

2. The displacement buffer for a floating photovoltaic subarray as described in claim 1, characterized in that, One end of the spring (112) is connected to the side wall of the buffer inner tube (11), and the other end of the spring (112) is connected to the side wall of the movable plate (113). An opening (114) is provided on the outer wall of the inner buffer tube (11), and a pair of limiting rings (115) are provided at intervals in the middle of the inner wall of the inner buffer tube (11). The opening (114) is located between the pair of limiting rings (115), and water enters and exits the inner buffer tube (11) through the opening (114).

3. The displacement buffer for a floating photovoltaic subarray as described in claim 1, characterized in that, A limiting block (116) is provided on the outer wall of the pull rod (111). The limiting block (116) is located inside the spring (112) and is close to the movable plate (113).

4. The displacement buffer for a floating photovoltaic subarray as described in claim 1, characterized in that, The underwater connection mechanism (3) includes a cable (31) and a collar (32). Both ends of the cable (31) are connected to a collar (32). One collar (32) is fitted and fixed on an anchor pile (5). The other collar (32) drives the cable (31) to pass around the suspended pulley (132) and then fits and is fixed on another anchor pile (5).

5. The displacement buffer for a floating photovoltaic subarray as described in claim 4, characterized in that, A pair of ring cables (135) are located on both sides of the inclined steel cable (31). A screw (1351) is threaded through the middle of the ring cable (135). A nut (1352) is adapted to be screwed on the screw (1351). The nut (1352) rotates on the screw (1351) and tightens the ring cable (135).

6. The displacement buffer for a floating photovoltaic subarray as described in claim 4, characterized in that, The water connection mechanism (2) includes a connecting seat (21) and an anchoring cable (22). The connecting seat (21) is located on the float (4). A roller (211) is provided on the connecting seat (21). One end of the anchoring cable (22) is wound around the roller (211), and the other end of the anchoring cable (22) is connected to the mooring ring (12).

7. The displacement buffer for a floating photovoltaic subarray according to claim 6, characterized in that, The connecting seat (21) is also provided with a slide rod (212), which is located below the roller (211) and is arranged parallel to the roller (211); The slide bar (212) is provided with a slider (213), the slider (213) can slide along the axial direction of the slide bar (212), the slider (213) is provided with a through hole (2130) extending radially along the slide bar (212), and the anchoring steel cable (22) extends downward after passing through the through hole (2130).

8. The displacement buffer for a floating photovoltaic subarray according to claim 7, characterized in that, The inner diameter of the perforation (2130) is larger than the outer diameter of the anchoring cable (22). The anchoring cable (22) is provided with a tapered sleeve (220). The tapered sleeve (220) is located below the perforation (2130). The maximum outer diameter of the tapered sleeve (220) is larger than the inner diameter of the perforation (2130), and the minimum outer diameter of the tapered sleeve (220) is smaller than the inner diameter of the perforation (2130). The slide bar (212) is also provided with a stop (2120), which is used to block the slider (213).

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