Flood-preventing and flood-preventing dam diversion channel

Abstract

This invention relates to the field of diversion channel technology, specifically a flood control and flood prevention dam diversion channel, comprising a dam, on which a diversion channel is provided. A hinge block is fixedly provided at the downstream end of the dam, and a support block is fixedly provided at the upstream end of the dam. A guide rod is fixedly provided at the lower end of the support block, and two support blocks are distributed on both sides of a diversion channel as a group. Hydraulic rods are hinged to both sides inside the diversion channel. Under the action of the hydraulic rods, the gate is rotated downstream to open the gate. At this time, as the gate rotates, the fork frame will rotate. The connecting cylinder on the fork frame is inserted into the smooth connecting frame of the garbage baffle. Therefore, as the gate opens, the garbage baffle will move downward, so that the part with the water passage hole is inserted into the water, thereby blocking the garbage from upstream and preventing it from flowing downstream with the water.

Description

Technical Field

[0001] This invention relates to the field of diversion canal technology, specifically a diversion canal for flood control and flood prevention dams. Background Technology

[0002] Flood control dams are large dams built to prevent river flooding from endangering people's lives and property. As an important part of urban infrastructure construction, flood control dams play a vital role in ensuring urban economic development. Whether the flood control slab can meet the basic requirements of flood control and whether it can effectively resist floods is related to the safety of people's lives and property and the stable development of the urban economy. At the same time, flood control dams can improve the uneven distribution of water resources in the region, increase surface runoff, improve the regional microclimate, and also play a certain role in eliminating the "heat island effect" of the city. The main function of flood control dams is to effectively resist floods during the flood season, protect the lives and property of downstream residents and their normal production and life, and are of great significance to regional economic development.

[0003] Diversion channels are installed on flood control dams to divert water. These channels are used to divert water when the gates are opened. Currently, the structures of these diversion channels are relatively simple. Once the flood season ends and water needs to be released, the garbage accumulated upstream will flow downstream with the water, causing environmental pollution downstream. Summary of the Invention

[0004] The purpose of this invention is to provide a diversion channel for flood control and flood prevention dams to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A flood control and flood prevention dam diversion channel includes a dam, on which a diversion channel is provided. A hinge block is fixedly installed at the downstream end of the dam, and a support block is fixedly installed at the upstream end of the dam. A guide rod is fixedly installed at the lower end of the support block, and two support blocks are distributed on both sides of a diversion channel as a group. Hydraulic rods are hinged to both sides of the interior of the diversion channel, and a gate is hinged to the other end of the hydraulic rod. The upper end of the gate is hinged to the hinge block, and the gate is located at the downstream end of the diversion channel. A fork frame is fixedly installed on the upstream end face of the gate. Connecting cylinders are symmetrically fixed on both sides of the end of the fork frame, and the fork frame is connected to an upstream garbage blocking and collection mechanism.

[0007] Preferably, the upstream waste blocking and collecting mechanism includes a waste baffle, an insertable movable plate, a rotating shaft, a water squeezing pressure plate, a return spring, and a spring protective sleeve. Two smooth connecting frames are symmetrically fixed on the upper side of the downstream end of the waste baffle. A connecting cylinder is inserted into the smooth connecting frame, and the diameter of the connecting cylinder is equal to the internal height of the smooth connecting frame.

[0008] Preferably, the waste baffle has symmetrical guide connection holes on both sides, and guide connecting rods are inserted into the guide connection holes. Two movable insertion holes are symmetrically opened on the end face of the waste baffle. Limiting round rods are welded into the movable insertion holes, and a matching insertion hole is opened on the waste baffle on one side of the movable insertion hole. The two movable insertion holes are located between the two matching insertion holes.

[0009] Preferably, garbage bins are symmetrically fixed on both sides of the upstream end face of the garbage baffle. The garbage bins are located below the mating holes, and the upper end of the garbage bins has a movable round hole. A door is movably installed on the end face of the garbage bins away from the garbage baffle. Garbage inlets are opened on the upper side of the opposite end faces of the two garbage bins, and a limiting baffle is fixedly installed on the lower side of this end face. A first drainage hole is opened on the lower end face of the garbage bins.

[0010] Preferably, a hinge plate is fixedly installed on the upstream end face of the garbage baffle, the hinge plate is located between two movable insertion holes, a water passage hole is opened at the lower end of the garbage baffle, the water passage hole is located on the lower side of the garbage bin, and a straight plate frame is fixedly installed on the downstream end face of the garbage baffle, and an installation hole is opened at the end of the straight plate frame away from the garbage baffle.

[0011] Preferably, the movable plate is inserted into the movable socket, and a limiting plate is fixedly provided on the lower side of one end of the movable plate. The limiting plate is located on the upstream side of the garbage baffle. A limiting hole is opened on the end of the movable plate near the limiting plate, and a limiting rod is inserted into the limiting hole. A garbage collection box is fixedly provided at the lower end of the limiting plate, and the side opening of the garbage collection box is in contact with the end face of the garbage bin.

[0012] Preferably, the garbage collection box has symmetrical movable grooves on both sides inside, and a garbage pusher plate is inserted into the garbage collection box. When the garbage pusher plate is not pushing garbage, it is located at the end away from the side opening of the garbage collection box. Limiting sliders are symmetrically fixed on both sides of the garbage pusher plate and are inserted into the movable grooves. A connecting plate is fixedly provided at the upper end of the garbage pusher plate, and a hinged push-pull plate is hinged to the connecting plate. The upper end of the hinged push-pull plate is hinged to the hinged plate.

[0013] Preferably, bearings are symmetrically sleeved at both ends of the rotating shaft, the bearings are installed in the mounting holes on the straight plate frame, an impeller is welded at the middle position of the rotating shaft, blades are fixedly arranged on the circumference of the impeller, cylindrical rotating blocks are symmetrically fixed at both ends of the rotating shaft, hollow frames are fixedly arranged on the cylindrical rotating blocks, and rollers are installed at the ends of the hollow frames.

[0014] Preferably, the squeezing plate is inserted into the garbage bin, and a movable insert rod is fixedly provided at the upper end of the squeezing plate. A bent connecting rod is fixedly provided at the upper end of the movable insert rod. The bent connecting rod is inserted into the mating hole, and the diameter of the bent connecting rod is larger than the diameter of the movable insert rod.

[0015] Preferably, a rectangular column is fixedly installed at the end of the bent connecting rod away from the squeezing pressure plate. The rectangular column is located on the downstream side of the garbage baffle, and an L-shaped pressure plate is fixedly installed at the lower end of the rectangular column. A return spring is sleeved on the movable insert rod, and the spring protective sleeve is welded to the upper end of the garbage bin, with the return spring located inside the spring protective sleeve.

[0016] Compared with the prior art, the beneficial effects of the present invention are: the present invention has a reasonable structural design and strong functionality, and has the following advantages:

[0017] 1. When the dam opens its gates to release water after the flood season, the hydraulic rods rotate the gate downstream. As the gate rotates, the fork frame rotates as well. The connecting cylinder on the fork frame is inserted into the smooth connecting frame of the garbage baffle. Therefore, as the gate opens, the garbage baffle moves downward, causing the part with the water passage hole to be inserted into the water, thus blocking the garbage from upstream and preventing it from flowing downstream with the water.

[0018] 2. Once the portion of the waste baffle with water passages is fully submerged in water, the impeller blades and the waste collection box are also submerged. The water flow causes the impeller to rotate, which in turn rotates the hollow frame. The hollow frame then moves the movable plate upwards, which in turn moves the waste collection box upwards until it aligns with the waste inlet. Simultaneously, the upward movement of the waste collection box, along with the hinged push-pull plate, pushes the waste towards the waste bin, thus collecting the waste.

[0019] 3. When the hollow frame separates from the plug-in movable plate, the garbage collection box is plugged back into the water. As the hollow frame continues to rotate, it will come into contact with the L-shaped pressing plate, which will then move the L-shaped pressing plate downwards, causing the water squeezing plate to move downwards and squeeze the garbage in the garbage bin, causing the water to flow out and preventing water from accumulating in the garbage bin. Attached Figure Description

[0020] Figure 1 A first-person perspective diagram of the dam assembly.

[0021] Figure 2 A second-view diagram of the dam assembly.

[0022] Figure 3 This is a schematic diagram of the internal structure of the diversion channel.

[0023] Figure 4 This is a schematic diagram of the assembly of the gate and the garbage baffle.

[0024] Figure 5 This is a schematic diagram of the structure of a garbage baffle.

[0025] Figure 6 A first-person view diagram of the assembly of a garbage baffle.

[0026] Figure 7 A second-view diagram illustrating the assembly of a waste baffle.

[0027] Figure 8 A third-person perspective diagram of the assembly of a waste baffle.

[0028] Figure 9 A first-person view of the assembly of the waste baffle and the bent connecting rod.

[0029] Figure 10 A first-person view of the assembly of the waste baffle and the bent connecting rod.

[0030] Figure 11 This is a schematic diagram of the assembly of the waste collection box and the waste pusher.

[0031] Figure 12 This is a schematic diagram of the water-squeezing pressure plate.

[0032] In the diagram: 1. Dam; 11. Diversion channel; 12. Hinge block; 13. Support block; 14. Guide rod; 2. Hydraulic rod; 3. Gate; 31. Fork frame; 32. Connecting cylinder; 4. Garbage baffle; 41. Smooth connecting frame; 42. Guide connecting hole; 43. Moving insertion hole; 44. Limiting rod; 45. Matching insertion hole; 46. Garbage bin; 461. Movable hole; 462. Bin door; 463. Garbage inlet; 464. Restricting baffle; 47. Hinge plate; 48. Water passage hole; 49. Straight plate frame; 5. 51. Insertable movable plate; 52. Restricting upright plate; 53. Garbage collection box; 54. Second drainage hole; 55. Moving chute; 56. Garbage pusher plate; 57. Limiting slider; 68. Connecting long plate; 69. Hinge push-pull plate; 60. Rotating shaft; 61. Impeller; 62. Blade; 63. Cylindrical rotating block; 64. Hollow frame; 65. Roller; 66. Bearing; 70. Squeezing pressure plate; 71. Movable insert rod; 72. Bending connecting rod; 73. Rectangular column; 74. L-shaped pressed plate; 8. Return spring; 9. Spring protective sleeve. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Please see Figures 1 to 12 The present invention provides a technical solution:

[0035] A flood control and flood prevention dam diversion channel includes a dam 1, on which a diversion channel 11 is provided. The number of diversion channels 11 can be set according to actual usage needs. A hinge block 12 is fixedly provided at the downstream end of the dam 1, and a support block 13 is fixedly provided at the upstream end of the dam 1. A guide rod 14 is fixedly provided at the lower end of the support block 13. Two support blocks 13 are a group and distributed on both sides of a diversion channel 11. Hydraulic rods 2 are hinged to both sides inside the diversion channel 11. A gate 3 is hinged to the other end of the hydraulic rod 2. The upper end of the gate 3 is hinged to the hinge block 12, and the gate 3 is located at the downstream end of the diversion channel 11. A fork frame 31 is fixedly provided on the upstream end face of the gate 3. Connecting cylinders 32 are symmetrically fixed on both sides of the end of the fork frame 31, and the fork frame 31 is connected to an upstream garbage blocking and collection mechanism.

[0036] The upstream garbage blocking and collection mechanism includes a garbage baffle 4, an insertable movable plate 5, a rotating shaft 6, a water squeezing pressure plate 7, a return spring 8, and a spring protective sleeve 9. Two smooth connecting frames 41 are symmetrically fixed on the upper side of the downstream end of the garbage baffle 4. A connecting cylinder 32 is inserted into the smooth connecting frame 41. The diameter of the connecting cylinder 32 is equal to the internal height of the smooth connecting frame 41. The surface of the connecting cylinder 32 and the inside of the smooth connecting frame 41 are smooth and burr-free, which facilitates the relative sliding between the connecting cylinder 32 and the smooth connecting frame 41.

[0037] The garbage baffle 4 has symmetrical guide connection holes 42 on both sides, and guide connecting rods 14 are inserted into the guide connection holes 42. Two movable insertion holes 43 are symmetrically opened on the end face of the garbage baffle 4. Limiting round rods 44 are welded into the movable insertion holes 43, and a matching insertion hole 45 is opened on the garbage baffle 4 on one side of the movable insertion hole 43. The two movable insertion holes 43 are located between the two matching insertion holes 45.

[0038] Garbage bins 46 are symmetrically fixed on both sides of the upstream end face of the garbage baffle 4. The garbage bins 46 are located below the mating holes 45, and the upper end of the garbage bins 46 is provided with a movable round hole 461. A door 462 is movably installed on the end face of the garbage bins 46 away from the garbage baffle 4. Garbage inlets 463 are provided on the upper side of the opposite end faces of the two garbage bins 46, and a limiting baffle 464 is fixedly provided on the lower side of this end face. A first drainage hole is provided on the lower end face of the garbage bins 46, that is, the first drainage hole is evenly distributed on the lower end face of the garbage bins 46.

[0039] A hinge plate 47 is fixedly installed on the upstream end face of the garbage baffle 4. The hinge plate 47 is located between two movable insertion holes 43. A water passage hole 48 is opened at the lower end of the garbage baffle 4. The water passage hole 48 is located on the lower side of the garbage bin 46. A straight plate frame 49 is fixedly installed on the downstream end face of the garbage baffle 4. An installation hole is opened at the end of the straight plate frame 49 away from the garbage baffle 4. In addition, when water needs to be released after the flood season, the part of the garbage baffle 4 with the water passage hole 48 is completely inserted into the water. At this time, the garbage baffle 4 completely blocks the water passage part at the lower end of the diversion channel 11, and the water passes through the water passage hole 48.

[0040] The movable plate 5 is inserted into the movable socket 43. The width of the movable plate 5 is equal to the width of the movable socket 43. A limiting plate 51 is fixedly installed on the lower side of one end of the movable plate 5. The limiting plate 51 is located on the upstream side of the garbage baffle 4. A limiting hole is opened on the end of the movable plate 5 near the limiting plate 51. A limiting rod 44 is inserted into the limiting hole. A garbage collection box 52 is fixedly installed at the lower end of the limiting plate 51. The side opening of the garbage collection box 52 is in contact with the end face of the garbage bin 46, and the limiting plate 51 is in contact with the side of the garbage bin 46.

[0041] The garbage collection box 52 has symmetrical movable grooves 53 on both sides inside, and a garbage pusher plate 54 is inserted into the garbage collection box 52. When the garbage pusher plate 54 is not pushing the garbage, it is located at the end away from the side opening of the garbage collection box 52. Limiting sliders 55 are symmetrically fixed on both sides of the garbage pusher plate 54. The limiting sliders 55 are inserted into the movable grooves 53, and the height of the limiting sliders 55 is equal to the height of the movable grooves 53. A connecting long plate 56 is fixedly installed at the upper end of the garbage pusher plate 54. A hinged push-pull plate 57 is hinged on the connecting long plate 56. The upper end of the hinged push-pull plate 57 is hinged to the hinge plate 47.

[0042] Bearings 66 are symmetrically sleeved at both ends of the rotating shaft 6. The bearings 66 are installed in the mounting holes on the straight plate frame 49. An impeller 61 is welded at the middle position of the rotating shaft 6. Blades 62 are fixedly arranged on the circumference of the impeller 61. Cylindrical rotating blocks 63 are symmetrically fixed at both ends of the rotating shaft 6. A hollow frame 64 is fixedly arranged on the cylindrical rotating block 63. A roller 65 is installed at the end of the hollow frame 64. The cylindrical rotating block 63 is located below the insertable movable plate 5. When the garbage baffle 4 completely blocks the water passage at the lower end of the diversion channel 11, the blades 62 on the impeller 61 are inserted into the water. At this time, the garbage collection box 52 is also inserted into the water, and its side opening is in contact with the limiting baffle 464. Second drainage holes 521 are evenly distributed on the lower end surface of the garbage collection box 52.

[0043] The squeezing plate 7 is inserted into the garbage bin 46, and a movable insert rod 71 is fixedly provided at the upper end of the squeezing plate 7. A bent connecting rod 72 is fixedly provided at the upper end of the movable insert rod 71. The bent connecting rod 72 is inserted into the mating hole 45, and the diameter of the bent connecting rod 72 is larger than the diameter of the movable insert rod 71. In addition, the length and width of the squeezing plate 7 are equal to the length and width of the inside of the garbage bin 46.

[0044] A rectangular column 73 is fixedly installed at the end of the bent connecting rod 72 away from the squeezing pressure plate 7. The rectangular column 73 is located on the downstream side of the garbage baffle 4, and an L-shaped pressing plate 74 is fixedly installed at the lower end of the rectangular column 73. A return spring 8 is sleeved on the movable insert rod 71. The spring protective sleeve 9 is welded to the upper end of the garbage bin 46, and the return spring 8 is located inside the spring protective sleeve 9. In addition, the L-shaped pressing plate 74 is located between the garbage baffle 4 and the cylindrical rotating block 63, and the L-shaped pressing plate 74 is located on the lower side of the insert movable plate 5. The two ends of the return spring 8 are respectively welded to the lower end surface of the bent connecting rod 72 and the upper end surface of the garbage bin 46.

[0045] During the operation of dam 1, when water needs to be released, the hydraulic rod 2 is activated to rotate the gate 3 downstream, thereby opening the gate 3. Simultaneously, the gate 3, under the action of the fork frame 31, moves the garbage baffle 4 downwards until it completely blocks the lower end of the diversion channel 11. At this point, the blades 62 on the impeller 61 are also inserted into the water. Upstream water flows through the water passage 48. Because the blades 62 are inserted into the water, the water action drives the impeller 61 to rotate, which in turn rotates the cylindrical rotating block 63, causing the hollow frame 64 to rotate to the end closest to the gate 3. As it continues to rotate, the roller 65 engages with the inserted moving part. The lower surfaces of plates 5 and 63 are in contact, and the rotation of the cylindrical rotating block 63 pushes the movable plate 5 upward, which in turn moves the garbage collection box 52 upward. This allows the garbage floating on the water to be collected into the garbage collection box 52. As the garbage collection box 52 moves upward, the hinged push-pull plate 57 pushes the garbage push plate 54 towards the garbage bin 46, thus concentrating the garbage in the garbage collection box 52 towards the side closer to the garbage bin 46. At this time, the garbage will not come out of the garbage collection box 52 due to the action of the limiting plate 51, until the lower surface of the garbage collection box 52 is aligned with the lower end of the garbage inlet 463. During this process, the garbage will be collected. The garbage is pushed into the garbage bin 46 by the pusher plate 54. Then, as the cylindrical rotating block 63 continues to rotate, the hollow frame 64 rotates to the side closer to the garbage baffle 4. Under gravity, the movable plate 5 moves downwards, causing the garbage collection box 52 to reset. At this time, the hollow frame 64 continues to rotate, causing the roller 65 to contact the L-shaped pressing plate 74, which in turn moves the L-shaped pressing plate 74 downwards. This, in turn, moves the water-squeezing plate 7 downwards, squeezing the garbage in the garbage bin 46 and squeezing out the water, thus accelerating the water outflow and preventing excessive water accumulation in the garbage bin 46. When the roller 65 separates from the L-shaped pressing plate 74... At this time, the squeezing pressure plate 7 will be reset under the action of the return spring 8. As the impeller 61 rotates, the garbage collection cycle is carried out, ensuring that the garbage is fully collected. In addition, when a certain amount of garbage accumulates in the garbage bin 46, the bin door 462 is opened for cleaning. Furthermore, the garbage baffle 4 completely blocks the water passage of the diversion channel 11, which can prevent fish from passing through and protect them, because the impeller 61 is in a rotating state at this time, which can easily injure fish. After the garbage on the water surface is cleaned up, the gate 3 can be partially opened, so that the blades 62 on the impeller 61 will not be inserted into the water, and fish can pass through without being harmed.

[0046] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A flood control and flood prevention dam diversion channel, comprising a dam, wherein a diversion channel is provided on the dam, characterized in that: A hinge block is fixedly installed at the downstream end of the dam, and a support block is fixedly installed at the upstream end of the dam. A guide rod is fixedly installed at the lower end of the support block. The two support blocks are a group, distributed on both sides of a diversion channel. Hydraulic rods are hinged to both sides inside the diversion channel. A gate is hinged to the other end of the hydraulic rod. The upper end of the gate is hinged to the hinge block, and the gate is located at the downstream end of the diversion channel. A fork frame is fixedly installed on the upstream end face of the gate. Connecting cylinders are symmetrically fixed on both sides of the end of the fork frame, and the fork frame is connected to an upstream garbage blocking and collection mechanism. The upstream garbage blocking and collection mechanism includes a garbage baffle, a plug-in movable plate, a rotating shaft, and a water squeezing pressure plate. The system includes a return spring and a spring protective sleeve. Two smooth connecting frames are symmetrically fixed on the upper side of the downstream-facing end of the waste baffle. Connecting cylinders are inserted into these smooth connecting frames, with the diameter of the cylinders equal to the internal height of the smooth connecting frames. Guide connecting holes are symmetrically opened on both sides of the waste baffle, with guide rods inserted into them. Two movable insertion holes are symmetrically opened on the end face of the waste baffle, with limit rods welded into them. A mating insertion hole is opened on one side of the movable insertion hole, with the two movable insertion holes positioned between the two mating insertion holes. A hinge plate is fixedly installed on the upstream-facing end face of the waste baffle, positioned between the two movable insertion holes. A [missing information - likely a design element] is opened at the lower end of the waste baffle. A water passage is located on the lower side of the garbage bin. A straight plate frame is fixedly installed on the downstream end face of the garbage baffle. An installation hole is opened on the end of the straight plate frame away from the garbage baffle. A movable plate is inserted into the movable insertion hole, and a limiting plate is fixedly installed on the lower side of one end of the movable plate. The limiting plate is located on the upstream side of the garbage baffle. A limit hole is opened on the end of the movable plate near the limiting plate, and a limit rod is inserted into the limit hole. A garbage collection box is fixedly installed at the lower end of the limiting plate. The side opening of the garbage collection box contacts the end face of the garbage bin. Garbage inlets are opened on the upper side of the opposite end faces of the two garbage bins. Sliding grooves are symmetrically opened on both sides inside the garbage collection box. A garbage pusher plate is inserted into the collection box. When the garbage pusher plate is not pushing garbage, it is located at the end away from the side opening of the garbage collection box. Limiting sliders are symmetrically fixed on both sides of the garbage pusher plate and are inserted into the moving slide groove. A connecting plate is fixedly installed at the upper end of the garbage pusher plate. A hinged push-pull plate is hinged to the connecting plate. The upper end of the hinged push-pull plate is hinged to the hinge plate. Bearings are symmetrically sleeved at both ends of the rotating shaft. The bearings are installed in the mounting holes on the straight plate frame. An impeller is welded at the middle position of the rotating shaft. Blades are fixedly installed on the circumference of the impeller. Cylindrical rotating blocks are symmetrically fixed at both ends of the rotating shaft. Hollow frames are fixedly installed on the cylindrical rotating blocks. Rollers are installed at the ends of the hollow frames.

2. The flood control and flood prevention dam diversion channel according to claim 1, characterized in that: Garbage bins are symmetrically fixed on both sides of the upstream end face of the garbage baffle. The garbage bins are located below the mating holes, and the upper end of the garbage bins has a movable round hole. A door is movably installed on the end face of the garbage bins away from the garbage baffle. A limiting baffle is fixedly installed on the lower side of the opposite end faces of the two garbage bins. A first drainage hole is opened on the lower end face of the garbage bins.

3. A flood control and flood prevention dam diversion channel according to claim 2, characterized in that: The squeezing plate is inserted into the garbage bin, and a movable rod is fixedly installed at the upper end of the squeezing plate. A bent connecting rod is fixedly installed at the upper end of the movable rod. The bent connecting rod is inserted into the mating hole, and the diameter of the bent connecting rod is larger than the diameter of the movable rod.

4. A flood control and flood prevention dam diversion channel according to claim 3, characterized in that: A rectangular column is fixedly installed at the end of the bent connecting rod away from the squeezing pressure plate. The rectangular column is located on the downstream side of the garbage baffle, and an L-shaped pressure plate is fixedly installed at the lower end of the rectangular column. A return spring is sleeved on the movable insert rod. The spring protective sleeve is welded to the upper end of the garbage bin, and the return spring is located inside the spring protective sleeve.

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