Sand quilt filling cage connecting structure

Abstract

The invention relates to a sand quilt filling cage connecting structure, which belongs to the technical field of bulwark sand quilt filling, and comprises an upper truss, a lower truss, reinforcing ribs and a first locking assembly, a connecting through groove for containing the pull ring is formed in the inner side of the upper truss, a locking strip inserted into the pull ring is slidably connected into the connecting through groove, and a first locking assembly is arranged in the upper truss. An upper limiting strip is connected between every two adjacent truss rods arranged on the upper truss, a lower limiting strip is connected between every two adjacent truss rods of the lower truss, and a control rod and a second locking assembly are connected between the upper limiting strip and the lower limiting strip. The second locking assembly locks the inclination angles of the upper limiting strip and the lower limiting strip at the same time. All the pull rings of the same truss rod are separated from the upper truss by controlling the first locking assembly, and the time for separating the pull rings from the suspension cage is shortened. The control rod controls the lower limiting strip to be far away from the bottom of the mortar bag body so as to improve the influence on the uniformity of mortar in the mortar bag body when the cage discharges water.

Description

Technical Field

[0001] This application relates to the technical field of sand filling for breakwaters, and in particular to a sand filling cage connection structure. Background Technology

[0002] Sand sheets are bag-shaped structures made of high-strength geotextiles. They are filled with sand on-site to form flexible soil units and are widely used in the core, bottom, or slope protection structures of breakwaters. After the compaction piles are driven, the raised silt must be removed before a 1m thick sand sheet can be applied. The filling material inside the sand sheet is either coarse or medium sand, depending on the specific conditions. Sand sheets can replace traditional riprap or backfill, forming a strong, flexible breakwater core structure that can adapt to foundation settlement and deformation, preventing cracking or collapse of the breakwater. They are particularly suitable for breakwater projects on soft soil foundations.

[0003] During sandbag construction, the sandbag is unfolded and placed on the cage. The pull rings around the sandbag are hung on the truss of the cage. The cage is lifted by the crawler and lowered into the water. The sand pump is connected to the sleeve of the sandbag and filled with mortar. Then, the cage is controlled to sink to the designated position. The diver changes the sleeve of the mortar filling to make the mortar filling even. After the sandbag is filled with mortar, the diver removes the sand pump pipe and ties the sleeve to prevent sand leakage. Then, the pull rings at the sandbag need to be removed from the cage truss to facilitate the cage to exit the water and detach from the sandbag.

[0004] However, to ensure that the mortar bags are fully deployed on the cage and enter the water stably, pull rings are installed around the mortar bags at intervals of about 1 meter. The more pull rings there are, the more stable the connection between the mortar bags and the cage, and the longer it takes for the divers to remove the pull rings from the cage. In addition, to prevent the mortar bags from falling and deforming when submerged, struts supporting the bottom of the mortar bags are installed at the corners of the cage. Although the corners of the mortar bags will deform and detach from the struts as the cage moves upward, this will also cause the mortar at the corners to move inward, affecting the uniformity of the mortar distribution inside the mortar bags. Summary of the Invention

[0005] In order to shorten the time for the pull ring to be removed from the cage and to improve the impact of the cage draining water on the uniformity of the mortar in the mortar bag, this application provides a connection structure for a sand-filled cage.

[0006] The technical solution for the sand-filled cage connection structure provided in this application is as follows: A sand-filled cage connection structure includes an upper truss, a lower truss, and reinforcing ribs connecting the upper truss and the lower truss; The upper truss has multiple connecting slots spaced apart on its inner circumferential side for accommodating pull rings. Locking bars for inserting pull rings are slidably connected in the connecting slots. The upper truss is provided with a first locking assembly for controlling all locking bars located at the same truss position to slide into or out of the connecting slots. An upper limit bar is connected between two adjacent trusses on the upper truss, a lower limit bar is connected between two trusses on the lower truss, a control rod is connected between the upper limit bar and the lower limit bar, and a second locking component is provided between the upper limit bar and the first locking component. The second locking component is used to lock the tilt angle of the upper limit bar and the lower limit bar. When the first locking component controls the locking bar to slide into the connecting groove, the second locking component locks the tilt angle of the upper limit bar and the lower limit bar.

[0007] By adopting the above technical solution, the positions of the upper and lower limit bars are adjusted using a control rod. The mortar bag is then unfolded and placed between the upper and lower trusses, with the lower limit bar contacting the bottom of the mortar bag. The pull rings are placed one by one into their corresponding connecting slots. The first locking component controls the locking bar to slide into the connecting slot, at which point the locking bar inserts and passes through the pull ring. The second locking component locks the positions of the upper and lower limit bars to prevent swaying. The cage is then submerged to a designated underwater position. After the mortar in the mortar bag is filled, the diver can control the first locking component to detach all pull rings from the upper truss on the same truss, shortening the time required to remove the pull rings from the cage. The positions of the lower and upper limit bars can be adjusted at this point. The lower limit bar is controlled to move away from the bottom of the mortar bag using a control rod, ensuring that the uniformity of the mortar in the mortar bag is not affected when the cage is brought out of the water, thus mitigating the impact on the uniformity of the mortar in the mortar bag during descent.

[0008] Optionally, the first locking assembly includes a connecting rod assembly, a locking rod assembly, and a return spring; The connecting rod assembly includes a first connecting rod and a second connecting rod. The side wall of the connecting through groove is provided with a locking groove that is slidably connected to the locking bar. The upper truss is provided with a first sliding groove that is slidably connected to the first connecting rod. The first sliding groove and the locking groove are arranged parallel to each other. The second connecting rod connects the first connecting rod and the locking bar. There are two first connecting rods spaced apart. The locking rod assembly is located between the two first connecting rods and is used to control the two first connecting rods to slide synchronously in directions away from or close to each other. Multiple locking bars on the same side are divided into two groups and are respectively connected to two first connecting rods. The locking grooves of the two groups of locking bars are opened in opposite directions. The return spring is located in the first groove and its two ends are respectively connected to the two first connecting rods; When the two first links slide in a direction away from each other, the locking bar slides into the locking groove and the return spring extends. When the two first links slide in a direction close to each other, the locking bar slides into the connecting groove and the return spring retracts.

[0009] Optionally, the locking lever assembly includes a locking slider and a locking screw; The locking slider is located between the two first connecting rods. The top of the upper truss is provided with a control groove that is vertically slidably connected to the locking slider. The control groove is connected to the first groove. The side wall of the locking slider facing the first connecting rod is provided with a locking inclined surface that slides against the first connecting rod. The locking inclined surface is inclined from top to bottom in a direction away from the first connecting rod. The locking screw is vertically arranged and threadedly connected to the locking slider. One end of the locking screw is located above the locking slider and the other end passes through the locking slider and is rotatably connected to the lower truss.

[0010] Optionally, the upper limit bar and the lower limit bar have the same structure. The upper limit bar includes a limit clip and a limit slider that is hinged to both ends of the limit clip. The two adjacent trusses on the upper truss are provided with limit grooves that are slidably connected to the limit sliders. The limit grooves are arranged parallel to the first groove at the truss. The limit grooves on the two adjacent trusses are connected. The two ends of the control rod are respectively connected to the limit slider at the upper truss and the limit slider at the lower truss.

[0011] Optionally, the second locking assembly includes a locking lever, a locking strip, and a locking spring; The locking rod is provided with a hinged support rod at the middle position, which is rotatably connected to the upper truss in the horizontal plane. The upper truss is provided with a second sliding groove for accommodating the rotation of the locking rod. The two ends of the second sliding groove are respectively connected to the first sliding groove and the limiting sliding groove. One end of the locking rod is located at the connection between the second slide groove and the first slide groove and is connected to one end of the locking spring on the side away from the first slide groove. The other end of the locking spring is connected to the second slide groove. A control inclined surface that fits with the first connecting rod is provided at the end of the locking rod facing the first slide groove. The control inclined surface is inclined towards one end of the locking rod in the direction close to the locking spring. The other end of the locking lever is located at the connection between the second slide groove and the limiting slide groove and is connected to the locking strip. The locking strip is located on the side of the limiting slider away from the first connecting rod. When the first connecting rod moves away from the locking lever, the locking spring extends, the control inclined surface is located in the first slide groove, and the locking strip is located in the second slide groove; When the first connecting rod abuts against the locking rotating rod, the locking rotating rod is arranged parallel to the first connecting rod, the locking spring contracts, and the locking clip is located in the limiting slide groove and abuts against the side of the limiting slider away from the first connecting rod.

[0012] Optionally, the limiting slide includes a first groove segment and a second groove segment that are interconnected. The first groove segment is connected to the second slide, and the second groove segment is interconnected with a second groove segment in an adjacent truss. The limiting slider slides on the first groove segment. The groove width of the first groove segment is greater than that of the second groove segment, and the groove width of the second groove segment is greater than that of the limiting strip.

[0013] Optionally, the upper and lower trusses are provided with guide grooves on their opposite end faces that are slidably connected to the control rod.

[0014] In summary, this application includes at least one of the following beneficial technical effects of the sand-filled cage connection structure: After adjusting the positions of the upper and lower limit bars using the control rod, the mortar bag is unfolded and placed between the upper and lower trusses, with the lower limit bar contacting the bottom of the mortar bag. The pull rings are then placed one by one into their corresponding connecting slots. The first locking assembly controls the locking bar to slide into the connecting slot, at which point the locking bar inserts and passes through the pull ring. The second locking assembly locks the positions of the upper and lower limit bars to prevent swaying. The cage is then submerged to the designated underwater position. Once the mortar bag is filled with mortar, the diver can control the first locking assembly to detach all pull rings from the upper truss on the same truss, shortening the time required to remove the pull rings from the cage. The positions of the lower and upper limit bars can then be adjusted. The lower limit bar is controlled to move away from the bottom of the mortar bag using the control rod, ensuring that the uniformity of the mortar inside the bag is not affected when the cage is brought out of the water, thus mitigating the impact on the uniformity of the mortar inside the bag during descent. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the sand-filled cage connection structure in this application.

[0016] Figure 2 This is a schematic diagram showing the connection between the first locking component and the second locking component in an embodiment of this application.

[0017] Figure 3 This is a schematic diagram of the structure of the first locking component in the embodiments of this application.

[0018] Figure 4 This is a schematic diagram showing the positions of the return spring and the locking slider in an embodiment of this application.

[0019] Figure 5 This is a schematic diagram of the splicing structure of multiple cages in an embodiment of this application.

[0020] In the diagram: 1. Upper truss; 11. Connecting through slot; 12. Locking slide; 13. First slide; 14. Control slide; 15. Limit slide; 151. First slot section; 152. Second slot section; 16. Second slide; 2. Lower truss; 21. Guide slide; 3. Reinforcing rib; 4. Locking bar; 5. First locking assembly; 51. First connecting rod; 52. Second connecting rod; 53. Locking slider; 54. Locking screw; 55. Locking ramp; 56. Return spring; 57. Mounting slot; 6. Upper limit bar; 61. Limiting clip; 62. Limiting slider; 7. Lower limit bar; 8. Control rod; 9. Second locking assembly; 91. Locking rotating rod; 92. Locking clip; 93. Locking spring; 94. Hinge support rod; 95. Control ramp. Detailed Implementation

[0021] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0022] This application discloses a sand-filled cage connection structure. (Refer to...) Figure 1-3 It includes an upper truss 1, a lower truss 2, and a reinforcing rib 3 connecting the upper truss 1 and the lower truss 2.

[0023] The upper truss 1 has multiple connecting slots 11 spaced apart on its inner circumferential side to accommodate pull rings. Locking bars 4 for inserting pull rings are slidably connected in the connecting slots 11. The upper truss 1 is provided with a first locking assembly 5 for controlling all locking bars 4 located on the same truss to slide into or out of the connecting slots 11.

[0024] In addition, an upper limit bar 6 is connected between two adjacent trusses on the upper truss 1, and a lower limit bar 7 is connected between two trusses on the lower truss 2. A control rod 8 is connected between the upper limit bar 6 and the lower limit bar 7. A second locking component 9 is provided between the upper limit bar 6 and the first locking component 5. The second locking component 9 is used to lock the tilt angle of the upper limit bar 6 and the lower limit bar 7.

[0025] In the initial state, the control lock bar 4 is not slid into the connecting slot 11, and the operator can adjust the positions of the upper limit bar 6 and the lower limit bar 7 to a suitable tilt angle using the control lever 8. Figure 3 The angle between the upper limit bar 6 and the truss of the upper truss 1 is 45 degrees, which is the optimal tilt angle. Then, the mortar bag is unfolded and placed between the upper truss 1 and the lower truss 2, with the lower limit bar 7 contacting the bottom end of the mortar bag. The pull rings are placed one by one into the corresponding connecting slots 11. The locking bar 4 is controlled by the first locking assembly 5 to slide into the connecting slot 11. At this time, the locking bar 4 inserts and passes through the pull ring. The first locking assembly 5 and the second locking assembly 9 are connected, thereby controlling the second locking assembly 9 to simultaneously lock the tilt angles of the upper limit bar 6 and the lower limit bar 7 to prevent shaking.

[0026] The cage is then submerged to a designated underwater position, and mortar continues to be poured into the mortar bags. Divers need to adjust the connection position of the pump pipe according to the mortar filling degree in different parts of the mortar bags. When the mortar in one side of the mortar bag is completely filled, the diver can control the first locking component 5 on that side to disengage all the pull rings of the same truss from the upper truss 1. At this time, the connected second locking component releases its restriction on the upper limit bar 6 and the lower limit bar 7. The diver then switches to the other side and continues to adjust the position of the pump pipe. This process continues until the mortar in the mortar bags is completely filled, at which point all the pull rings are disengaged. Compared to the previous method of dismantling the pull rings one by one, this shortens the time required to disengage the pull rings from the cage. At this point, the position of the lower limit bar 7 and the upper limit bar 6 can be adjusted. By controlling the lower limit bar 7 away from the bottom of the mortar bag through the control rod 8, the four corners of the bottom of the mortar bag are in gentle contact with the ground. Afterward, when the cage is lifted out of the water, the lower limit bar 7 will not contact the mortar bag, thus improving the uniformity of the mortar in the mortar bag when the cage is lifted out of the water.

[0027] Reference Figure 2-4 The first locking assembly 5 includes a connecting rod assembly, a locking rod assembly, and a return spring 56.

[0028] The connecting rod group includes a first connecting rod 51 and a second connecting rod 52. The side wall of the connecting through groove 11 is provided with a locking groove 12 that is slidably connected to the locking bar 4. The upper truss 1 is provided with a first sliding groove 13 that is slidably connected to the first connecting rod 51. The first sliding groove 13 is arranged parallel to the locking groove 12. The second connecting rod 52 connects the first connecting rod 51 and the locking bar 4. For ease of operation, two first links 51 are spaced apart. The locking rod group is located between the two first links 51 and is used to control the two first links 51 to slide synchronously in directions away from or close to each other. Multiple locking bars 4 on the same side are divided into two groups and are respectively connected to the two first links 51. The opening directions of the locking grooves 12 where the two groups of locking bars 4 are located are opposite.

[0029] In addition, the locking lever assembly includes a locking slider 53 and a locking screw 54.

[0030] The locking slider 53 is located between the two first connecting rods 51. The top of the upper truss 1 is provided with a control groove 14 that is vertically slidably connected to the locking slider 53. The control groove 14 is connected to the first groove 13. The side wall of the locking slider 53 facing the first connecting rod 51 is provided with a locking inclined surface 55 that slides against the first connecting rod 51. The locking inclined surface 55 is inclined from top to bottom along the direction away from the first connecting rod 51. The locking screw 54 is vertically arranged and threadedly connected to the locking slider 53. One end of the locking screw 54 is located above the locking slider 53 and the other end passes through the locking slider 53 and is rotatably connected to the lower truss 2.

[0031] The return spring 56 is located in the first slide groove 13 and is connected to two first connecting rods 51 at both ends. In order to facilitate the installation of the return spring 56, the bottom of the locking slider 53 is provided with a mounting groove 57 to accommodate the return spring 56.

[0032] When the two first links 51 slide in a direction away from each other, the locking bar 4 slides into the locking groove 12, and the return spring 56 extends. When the two first links 51 slide in a direction close to each other, the locking bar 4 slides into the connecting groove 11, and the return spring 56 retracts.

[0033] By controlling the sliding direction of the locking slider 53 through the sliding groove 14, rotating the locking screw 54 can control the locking slider 53 to slide up or down. Rotating the locking screw 54 in the forward direction controls the slider to move upward, the return spring 56 retracts, causing the two first sliding rods on the same side to move closer together, and the locking bar 4 slides into the locking groove 12. Rotating the locking screw 54 in the reverse direction controls the slider to move downward, the two first sliding rods on the same side move further apart, the return spring 56 extends, and the locking bar 4 slides into the connecting through groove 11.

[0034] Reference Figure 1-2 The upper limit bar 6 and the lower limit bar 7 have the same structure. The upper limit bar 6 includes a limit clip 61 and a limit slider 62 that is hinged to both ends of the limit clip 61. The two adjacent trusses on the upper truss 1 are provided with limit grooves 15 that are slidably connected to the limit sliders 62. The limit grooves 15 are arranged parallel to the first grooves 13 at the truss. The limit grooves 15 on the two adjacent trusses are connected. The two ends of the control rod 8 are respectively connected to the limit sliders 62 at the upper truss 1 and the limit sliders 62 at the lower truss 2.

[0035] like Figure 2 As shown, the second locking assembly 9 includes a locking lever 91, a locking strip 92, and a locking spring 93.

[0036] The locking rod 91 is provided with a hinged support rod 94 at the middle position, which is rotatably connected to the upper truss 1 in the horizontal plane. The upper truss 1 is provided with a second slide groove 16 for accommodating the rotation of the locking rod 91. The two ends of the second slide groove 16 are respectively connected to the first slide groove 13 and the limiting slide groove 15.

[0037] In addition, one end of the locking lever 91 is located at the connection between the second slide groove 16 and the first slide groove 13 and is connected to one end of the locking spring 93 on the side away from the first slide groove 13. The other end of the locking spring 93 is connected to the second slide groove 16. The end of the locking lever 91 facing the first slide groove 13 is provided with a control inclined surface 95 that is in contact with the first connecting rod 51. The control inclined surface 95 is inclined towards one end of the locking lever 91 in the direction close to the locking spring 93.

[0038] In addition, the other end of the locking lever 91 is located at the connection between the second slide groove 16 and the limiting slide groove 15 and is connected to the locking strip 92. The locking strip 92 is located on the side of the limiting slider 62 away from the first connecting rod 51.

[0039] When the first link 51 moves away from the locking lever 91, the locking spring 93 extends, the control ramp 95 is located in the first slide groove 13, and the locking strip 92 is located in the second slide groove 16.

[0040] When the first link 51 abuts against the locking rotating rod 91, the locking rotating rod 91 is arranged parallel to the first link 51, the locking spring 93 contracts, and the locking strip 92 is located in the limiting slide groove 15 and abuts against the side of the limiting slider 62 away from the first link 51, so as to prevent the limiting slider 62 from shaking and improve the structural stability between the upper limit strip 6 and the upper truss 1.

[0041] To limit the sliding distance of the limiting slide 15, the limiting slide 15 includes a first groove segment 151 and a second groove segment 152 that are interconnected. The first groove segment 151 is connected to the second slide 16, and the second groove segment 152 is interconnected with the second groove segment 152 in the adjacent truss. The limiting slider 62 slides on the first groove segment 151. The length of the first groove segment 151 is the sliding distance of the limiting slider 62. The groove width of the first groove segment 151 is greater than that of the second groove segment 152, and the groove width of the second groove segment 152 is greater than that of the limiting strip 61.

[0042] The limiting sliders 62 located at both ends of the upper limit bar 6 are in limiting grooves 15 of different lengths. The length of the first groove segment 151 where one limiting slider 62 is located is shorter than the length of the second groove segment 152, while the length of the first groove segment 151 where the other limiting slider 62 is located is the same as the length of the second groove segment 152. This allows the diver to drag the upper limit bar 6 completely into the upper truss 1 using the control rod 8. At this point, the upper limit bar 6 is located in the limiting groove 15 where the length of the first groove segment 151 is shorter than the length of the second groove segment 152, and the limiting clip 61 is located in the second groove segment 152 and detached from the bottom of the mortar bag.

[0043] like Figure 1 As shown, to facilitate the movement of the control lever 8, guide grooves 21 are provided on the opposite end faces of the upper truss 1 and the lower truss 2, which are slidably connected to the control lever 8. The control lever 8 always moves between the upper truss 1 and the lower truss 2, synchronously controlling the positions of the upper limit bar 6 and the lower limit bar 7.

[0044] To further simplify the diver's operation, a control device, such as a motor, is connected to the top of the locking screw 54. The number of rotations of the locking screw 54 is preset based on the distance the locking slider 53 moves up and down, thereby setting the number of rotations of the motor. Similarly, a cylinder can be installed at the control lever 8. The cylinder is mounted on the reinforcing rib 3, and the output rod is arranged parallel to the opening direction of the limiting slide groove 15. The extension and retraction length of the cylinder output rod is preset based on the length of the first groove segment 151. The diver can simply press a button to realize the forward or reverse rotation of the locking screw 54 and the extension and retraction of the cylinder output rod.

[0045] The dimensions of the upper truss 1 and the lower truss 2 can be adjusted according to the actual situation, such as... Figure 5 As shown, multiple cages can be spliced ​​together and lowered synchronously, saving time and improving efficiency.

[0046] The implementation principle of the sand-filled cage connection structure in this application embodiment is as follows: First, the positions of the upper limit bar 6 and the lower limit bar 7 are adjusted to a suitable tilt angle using the control rod 8. Then, the mortar bag is unfolded and placed between the upper truss 1 and the lower truss 2, with the lower limit bar 7 contacting the bottom end of the mortar bag. The pull rings are placed one by one into the corresponding connecting slots 11. The locking bar 4 is slid into the connecting slot 11 by the first locking assembly 5. At this time, the locking bar 4 is inserted and passes through the pull ring. The second locking assembly 9 simultaneously locks the tilt angle of the upper limit bar 6 and the lower limit bar 7. Then... The cage is submerged to a designated underwater position, and mortar continues to be pumped into the mortar bags. Divers need to adjust the connection position of the pump pipe according to the mortar filling degree in different parts of the mortar bags. When the mortar in one side of the mortar bag is completely filled, the diver can control the first locking component 5 on that side to disengage all the pull rings of the same truss from the upper truss 1. At this time, the connected second locking component releases its restriction on the upper limit bar 6 and the lower limit bar 7. The diver then switches to the other side and continues to adjust the position of the pump pipe until the mortar in the mortar bag is completely filled, at which point all the pull rings are disengaged. Compared to the previous method of dismantling the pull rings one by one, this shortens the time required to disengage the pull rings from the cage. At this time, the position of the lower limit bar 7 and the upper limit bar 6 can be adjusted. By controlling the lower limit bar 7 away from the bottom of the mortar bag through the control rod 8, the four corners of the bottom of the mortar bag make gentle contact with the ground. Afterwards, when the cage is lifted out of the water, the lower limit bar 7 does not contact the mortar bag, thus improving the uniformity of the mortar in the mortar bag when the cage is lifted out of the water.

[0047] 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 sand-filled cage connection structure, characterized in that, It includes an upper truss (1), a lower truss (2), and a reinforcing rib (3) connecting the upper truss (1) and the lower truss (2). The upper truss (1) has multiple connecting slots (11) spaced apart on its inner circumferential side for accommodating pull rings. Locking bars (4) for inserting pull rings are slidably connected in the connecting slots (11). The upper truss (1) is provided with a first locking assembly (5) for controlling all locking bars (4) located at the same truss to slide into or out of the connecting slots (11). An upper limit bar (6) is connected between two adjacent trusses on the upper truss (1), a lower limit bar (7) is connected between two trusses on the lower truss (2), a control rod (8) is connected between the upper limit bar (6) and the lower limit bar (7), and a second locking component (9) is provided between the upper limit bar (6) and the first locking component (5). The second locking component (9) is used to lock the tilt angle of the upper limit bar (6) and the lower limit bar (7). When the first locking component (5) controls the locking bar (4) to slide into the connecting through groove (11), the second locking component (9) locks the tilt angle of the upper limit bar (6) and the lower limit bar (7).

2. The sand-filled cage connection structure according to claim 1, characterized in that: The first locking assembly (5) includes a connecting rod assembly, a locking rod assembly, and a return spring (56). The connecting rod group includes a first connecting rod (51) and a second connecting rod (52). The side wall of the connecting through groove (11) is provided with a locking groove (12) that is slidably connected to the locking bar (4). The upper truss (1) is provided with a first sliding groove (13) that is slidably connected to the first connecting rod (51). The first sliding groove (13) and the locking groove (12) are arranged in parallel. The second connecting rod (52) connects the first connecting rod (51) and the locking bar (4). There are two first connecting rods (51) spaced apart. The locking rod group is located between the two first connecting rods (51) and is used to control the two first connecting rods (51) to slide synchronously in a direction away from or close to each other. The multiple locking bars (4) on the same side are divided into two groups and are respectively connected to the two first connecting rods (51). The locking grooves (12) where the two groups of locking bars (4) are located are opened in opposite directions. The return spring (56) is located in the first groove (13) and its two ends are respectively connected to the two first connecting rods (51); When the two first links (51) slide in a direction away from each other, the locking bar (4) slides into the locking groove (12) and the return spring (56) extends. When the two first links (51) slide in a direction close to each other, the locking bar (4) slides into the connecting through groove (11) and the return spring (56) retracts.

3. The sand-filled cage connection structure according to claim 2, characterized in that: The locking lever assembly includes a locking slider (53) and a locking screw (54). The locking slider (53) is located between the two first connecting rods (51). The top of the upper truss (1) is provided with a control groove (14) that is vertically slidably connected to the locking slider (53). The control groove (14) is connected to the first groove (13). The locking slider (53) is provided with a locking inclined surface (55) that slides against the first connecting rod (51) on the side wall facing the first connecting rod (51). The locking inclined surface (55) is inclined from top to bottom in a direction away from the first connecting rod (51). The locking screw (54) is vertically arranged and threadedly connected to the locking slider (53). One end of the locking screw (54) is located above the locking slider (53) and the other end passes through the locking slider (53) and is rotatably connected to the lower truss (2).

4. The sand-filled cage connection structure according to claim 3, characterized in that: The upper limit bar (6) and the lower limit bar (7) have the same structure. The upper limit bar (6) includes a limit clip (61) and a limit slider (62) hinged to both ends of the limit clip (61). The two adjacent trusses on the upper truss (1) are provided with limit grooves (15) that are slidably connected to the limit sliders (62). The limit grooves (15) are arranged parallel to the first groove (13) at the truss. The limit grooves (15) on the two adjacent trusses are connected. The two ends of the control rod (8) are respectively connected to the limit sliders (62) at the upper truss (1) and the limit sliders (62) at the lower truss (2).

5. The sand-filled cage connection structure according to claim 4, characterized in that: The second locking assembly (9) includes a locking lever (91), a locking strip (92), and a locking spring (93). The locking rod (91) is provided with a hinged support rod (94) that is rotatably connected to the upper truss (1) on the horizontal plane at the middle position. The upper truss (1) is provided with a second slide groove (16) for accommodating the rotation of the locking rod (91). The two ends of the second slide groove (16) are respectively connected to the first slide groove (13) and the limiting slide groove (15). One end of the locking rod (91) is located at the connection between the second slide groove (16) and the first slide groove (13) and is connected to one end of the locking spring (93) on the side away from the first slide groove (13). The other end of the locking spring (93) is connected to the second slide groove (16). The locking rod (91) is provided with a control inclined surface (95) that fits against the first connecting rod (51) at one end facing the first slide groove (13). The control inclined surface (95) is inclined towards one end of the locking rod (91) in the direction close to the locking spring (93). The other end of the locking lever (91) is located at the connection between the second slide groove (16) and the limiting slide groove (15) and is connected to the locking strip (92). The locking strip (92) is located on the side of the limiting slider (62) away from the first connecting rod (51). When the first connecting rod (51) moves away from the locking rotating rod (91), the locking spring (93) extends, the control inclined surface (95) is located in the first slide groove (13), and the locking strip (92) is located in the second slide groove (16); When the first connecting rod (51) abuts against the locking rotating rod (91), the locking rotating rod (91) is arranged parallel to the first connecting rod (51), the locking spring (93) contracts, and the locking clip (92) is located in the limiting slide groove (15) and abuts against the side of the limiting slider (62) away from the first connecting rod (51).

6. The sand-filled cage connection structure according to claim 5, characterized in that: The limiting slide (15) includes a first groove segment (151) and a second groove segment (152) that are interconnected. The first groove segment (151) is connected to the second slide (16), and the second groove segment (152) is interconnected with the second groove segment (152) in the adjacent truss. The limiting slider (62) slides on the first groove segment (151). The groove width of the first groove segment (151) is greater than that of the second groove segment (152), and the groove width of the second groove segment (152) is greater than that of the limiting strip (61).

7. The sand-filled cage connection structure according to claim 1, characterized in that: The upper truss (1) and the lower truss (2) are provided with guide grooves (21) that are slidably connected to the control rod (8) on their opposite end faces.

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