Disc lifting ecological buoy gate

Abstract

The invention relates to the technical field of water conservancy projects, in particular to a disc lifting ecological buoy gate which comprises a gate body, a buoy, a power source, a cam, a vibration mechanism and a starting mechanism, the buoy is arranged below the side wall of the gate body, and the power source is installed on the outer wall of the buoy; the power source is provided with two output ends, namely a first output shaft and a second output shaft, the cam is arranged on the first output shaft, the vibration mechanism is arranged on the inner wall of the buoy, and the starting mechanism is arranged at the top end of the outer wall of the buoy, so that the problem that the buoy is influenced by sludge is solved.

Description

Technical Field

[0001] The invention relates to the technical field of water conservancy engineering, in particular to a disc lifting ecological buoy gate. Background Art

[0002] The disc buoy gate is a special design in water conservancy projects. It combines the buoyancy characteristics of the disc structure and the buoyancy characteristics of the buoy. It is mainly used to regulate water flow and water level. The installation position of the buoy directly affects the buoyancy balance, opening and closing flexibility, and water flow control effect of the gate. In order to ensure the stability of the gate and effectively maintain its vertical balance, the buoy is usually installed below the gate and connected to the gate as a whole. However, this installation position is easily affected by silt accumulation, which may cause the buoyancy to weaken or the buoy to get stuck, thus affecting the normal operation of the gate. Summary of the invention

[0003] The object of the present invention is to provide a disc lifting ecological buoy gate to solve the problem in the above background technology that the buoy is easily affected by silt accumulation, resulting in weakened buoyancy or the buoy is stuck.

[0004] To achieve the above object, the present invention provides the following technical solution: a disc lifting ecological buoy gate, comprising: a gate body and a buoy, wherein the buoy is arranged below the side wall of the gate body, and further comprising: A power source is installed on the outer wall of the buoy, and the power source has two output ends, a first output shaft and a second output shaft; A cam, disposed on the first output shaft; A vibration mechanism is arranged on the inner wall of the buoy; A starting mechanism is arranged at the top of the outer wall of the buoy; The vibration mechanism comprises: A support rod is arranged on the inner wall of the buoy along the axial direction of the buoy; A vibration plate is arranged on the inner wall of the buoy along the radial direction of the buoy; A reed sheet is arranged on the support rod, and the reed sheet and the vibration plate are in the same extension direction; A swing arm, the top end of which is arranged at the top end of the reed; A striking hammer, arranged at the bottom end of the swing arm; A baffle, the baffle being arranged at the top end of the swing arm, and the baffle and the spring sheet are in the same extending direction; A lever, the lever being hinged to the top end of the swing arm and located on one side of the baffle, and the outer edge of the cam being in contact with the lever; A first restoring member is disposed between the shifting rod and the swing arm.

[0005] Preferably, there is a gap between the striking hammer and the vibration plate.

[0006] Preferably, the number of the vibration mechanism is at least one, and the number of the cams matches the number of the vibration mechanisms.

[0007] Preferably, when the number of the vibration mechanisms is greater than one, the natural frequency of the vibration plate in each of the vibration mechanisms is consistent, the distance between each of the striking hammers and the vibration plate is the same, the parameters of each of the reeds are completely consistent, each of the cams is driven by the same power source, and the angles generated between each of the adjacent cams are the same.

[0008] Preferably, the starting mechanism comprises: A bottom plate is arranged on the top of the annular outer wall of the buoy, and the bottom plate is made of ferromagnetic metal; At least two guide rods are arranged on the bottom plate; An auxiliary buoyancy box is located directly above the bottom plate, and the auxiliary buoyancy box is slidably disposed on at least two of the guide rods; A magnet is disposed at the bottom of the auxiliary buoyancy tank; A traction rope is arranged between the auxiliary buoy and the power source.

[0009] Preferably, the buoyancy generated when the auxiliary buoyancy box is completely immersed in water is greater than the attraction between the magnet and the bottom plate.

[0010] Preferably, the movable distance of the auxiliary buoy is smaller than the axial length of the guide rod.

[0011] The disc-lifting ecological buoy gate proposed in the present invention has the beneficial effect that when the buoy is stuck, the buoy can assist the float box to overcome the attraction between the magnet and the bottom plate and float up, so that the power source can output power, control the cam to rotate, and prompt the swing arm to rotate, so that the knocking hammer hits the vibration plate, and the vibration plate transmits the generated vibration to the buoy, thereby loosening the silt outside the buoy, allowing the buoy to float smoothly, and thus opening the gate. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a schematic diagram of the structure of the starting mechanism of the present invention; Figure 3 It is a schematic diagram of the partial structure of the exhaust mechanism of the present invention; Figure 4 It is a schematic diagram of the vibration mechanism of the present invention; Figure 5 It is a schematic diagram of the exhaust mechanism of the present invention; Figure 6It is a partial enlarged view of the exhaust mechanism of the present invention; Figure 7 It is a schematic diagram of the local structure of the vibration mechanism of the present invention; Figure 8 It is a schematic diagram of the partial structure of the exhaust mechanism of the present invention.

[0013] In the figure: 1, gate body, 2, buoy, 3, power source, 31, first output shaft, 32, second output shaft, 4, cam, 5, vibration mechanism, 51, support rod, 52, vibration plate, 53, reed, 54, swing arm, 55, knock hammer, 56, baffle, 57, lever, 58, first reset member, 6, starting mechanism, 61, bottom plate, 62, guide rod, 63, auxiliary buoy, 64, magnet, 65, traction Rope, 7, exhaust mechanism, 701, air bag, 702, outlet valve, 703, air inlet pipe, 704, air inlet valve, 705, sliding rod, 706, slider, 707, rack, 708, pressure plate, 709, connecting rod, 710, bracket, 711, first gear, 712, second gear, 713, transmission box, 714, transmission wheel, 7141, housing, 7142, claw, 7143, second reset member. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0015] See also Figure 1-8 The present invention provides a technical solution for a disc lifting ecological floating cylinder gate. The detailed connection means are well-known technologies in the art. The following mainly introduces the working principle and process. The specific work is as follows.

[0016] A disc-lifting ecological buoy 2 gate comprises: a gate body 1 and a buoy 2, wherein the buoy 2 is arranged below the side wall of the gate body 1, and the gate body 1 is a circular structure, which can evenly disperse pressure and stress and avoid stress concentration points. At the same time, it is less likely to deform when subjected to external forces and can maintain the stability of its shape and function. A fish hole can be opened on the circular gate to allow fish and other aquatic organisms to pass freely when the gate is closed or partially closed, so as to achieve an eco-friendly function. The gate body 1 also comprises: a power source 3, a cam 4, a vibration mechanism 5 and a starting mechanism 6.

[0017] The power source 3 is installed on the outer wall of the pontoon 2. The power source 3 has two output ends, a first output shaft 31 and a second output shaft 32. The power source 3 can use a spring motor, a device that stores energy through a mechanical spring and releases it to drive mechanical movement. After the spring is fully tightened, a locking mechanism will fix the spring to prevent it from releasing energy when it is not needed. The locking mechanism belongs to the prior art and is not shown in the figure. At the same time, the power source 3 is equipped with a reducer. The first output shaft 31 and the second output shaft 32 have different speeds and torques. It is an effective solution for some areas where power facilities are not laid. In the embodiment of the present invention, if there is electric power facility, an electric motor can be used to provide power output. The cam 4 is arranged on the first output shaft 31. The first output shaft 31 has a lower number of revolutions and a larger torque, which provides conditions for the rotation of the cam 4. The vibration mechanism 5 is arranged on the inner wall of the buoy 2. The rotation of the cam 4 drives the vibration mechanism 5 to generate vibration, which is transmitted to the buoy 2. The vibration is used to gradually separate the buoy 2 and the silt until the buoy 2 is completely detached. The starting mechanism 6 is arranged on the top of the outer wall of the buoy 2. According to the position of the starting mechanism 6, it is determined whether the buoy 2 is stuck, thereby controlling the power output of the power source 3.

[0018] The vibration mechanism 5 includes a support rod 51 , a vibration plate 52 , a reed 53 , a swing arm 54 , a striking hammer 55 , a baffle 56 , a lever 57 and a first restoring member 58 .

[0019] The support rod 51 is arranged on the inner wall of the buoy 2 along the axial direction of the buoy 2. The length of the support rod 51 is extended according to the number of reeds 53. At the same time, in order to ensure the stability of the support rod 51, reinforcing ribs can be added to the support rod 51 as needed. The vibration plate 52 is arranged on the inner wall of the buoy 2 along the radial direction of the buoy 2. A material with a high elastic modulus, such as spring steel, stainless steel or alloy steel, is selected to ensure that the vibration plate 52 can quickly recover to its original state when subjected to vibration force and continue to vibrate. At the same time, the vibration plate 52 adopts a rectangular structure and is tightly fixed to the inner wall of the buoy 2 to ensure that the vibration energy can be effectively transmitted without being absorbed or weakened by the installation structure. The reed 53 is arranged on the support rod 51, and the reed 53 and the vibration plate 52 are in the same extension direction. The reed 53 can generate sufficient elastic force. The top end of the swing arm 54 is arranged at the top end of the reed 53. The swing arm 54 can deflect when the reed 53 is bent. The striking hammer 55 is arranged at the bottom end of the swing arm 54. By applying a force on the swing arm 54, the bottom end of the swing arm 54 is moved away from the vibration plate 52, so that the reed 53 is bent. The striking hammer 55 strikes the vibration plate 52 by the elastic force of the reed 53 to generate vibration. The baffle 56 is arranged at the top end of the swing arm 54, and the baffle 56 and the reed 53 are in the same extension direction. The lever 57 is hinged to the top end of the swing arm 54 and is located on one side of the baffle 56. The outer edge of the cam 4 contacts the lever 57. Under the limit of the baffle 56, the lever 57 can only When the cam 4 contacts the lever 57, the swing arm 54 can be driven to deflect in only one direction through the lever 57, thereby realizing unidirectional transmission. When there are multiple vibration mechanisms 5, they are arranged in a mirror-image alternating manner to ensure that the cam 4 can drive the swing arm 54 to rotate when the first output shaft 31 is reversed. The first reset member 58 is arranged between the lever 57 and the swing arm 54. The first reset member 58 can be a spring, a rubber block, etc. The preload force of the first reset member 58 makes the lever 57 abut against the baffle 56.

[0020] There is a gap between the striking hammer 55 and the vibration plate 52 in the initial position. The appropriate gap can reduce the direct contact time between the striking hammer 55 and the vibration plate 52 and reduce wear. Through the appropriate gap distance, the required striking intensity can be obtained, thereby obtaining a greater vibration amplitude.

[0021] There is at least one vibration mechanism 5, and the number of cams 4 matches the number of vibration mechanisms 5. By increasing the number of vibration mechanisms 5, the output power of the overall vibration system is increased, thereby improving the vibration intensity. At the same time, a larger area can be covered, so that the vibration effect is evenly distributed in the entire system or equipment, thereby improving the efficiency of the float 2 in separating from the silt.

[0022] When the number of vibration mechanisms 5 is greater than one, the natural frequency of the vibration plate 52 in each vibration mechanism 5 is consistent, and each striking hammer 55 is at the same distance from the vibration plate 52. Each striking hammer 55 has the same acceleration distance when hitting the vibration plate 52, so they will obtain the same speed and kinetic energy, which means that the intensity of each strike is the same, so that each vibration plate 52 is subjected to equal impact force. The same strike intensity can ensure that the vibration amplitude and frequency generated by each vibration plate 52 are consistent, and the parameters of each reed 53 are completely consistent, ensuring that the elastic force generated by each reed 53 when bent to the same degree is the same, so as to ensure that the intensity of each strike is the same. Each cam 4 is driven by the same power source 3, and the angles generated between each adjacent cam 4 are the same. Using the same power source 3 can ensure that the frequency and phase of all vibration mechanisms 5 are completely consistent, thereby achieving synchronous vibration and avoiding mutual interference or mismatch between the vibration waves generated by each vibration mechanism 5, thereby reducing the vibration intensity.

[0023] The starting mechanism 6 includes: a bottom plate 61 , at least two guide rods 62 , an auxiliary buoyancy tank 63 , a magnet 64 and a traction rope 65 .

[0024] The bottom plate 61 is arranged on the top of the annular outer wall of the buoy 2. The bottom plate 61 is a ferromagnetic metal and can be attracted by the magnet 64. At least two guide rods 62 are arranged on the bottom plate 61. The guide rods 62 are arranged along the normal of the top surface of the bottom plate 61. At the same time, the guide rods 62 are distributed along the radial direction of the buoy 2. The auxiliary buoy 63 is located directly above the bottom plate 61, and the auxiliary buoy 63 is slidably arranged on at least two guide rods 62. The magnet 64 is arranged at the bottom of the auxiliary buoy 63. When no external force is applied, the magnet 64 is attracted to the bottom plate 61. The traction rope 65 is arranged between the auxiliary buoy 63 and the power source 3, and the traction rope 65 is connected to the locking mechanism of the power source 3. When the traction rope 65 pulls the locking mechanism, the locking mechanism can be released, that is, the magnet 64 is separated from the bottom plate 61, the auxiliary float 63 floats up, and the traction rope 65 is tightened, it is in a released state; when the traction rope 65 does not pull the locking mechanism, that is, the magnet 64 is attached to the bottom plate 61, and the traction rope 65 is loose, it is in a locked state.

[0025] When the auxiliary float 63 is completely immersed in water, the buoyancy generated is greater than the attraction between the magnet 64 and the bottom plate 61. When the water surface completely submerges the auxiliary float 63, the magnet 64 is separated from the bottom plate 61. At the same time, the traction rope 65 is tightened, the locking mechanism of the power source 3 is in a released state, and the power source 3 outputs power.

[0026] The movable distance of the auxiliary buoy 63 is smaller than the axial length of the guide rod 62 , and the auxiliary buoy 63 can only move along the extension direction of the two guide rods 62 , ensuring that the magnet 64 can be attracted to the bottom plate 61 when the auxiliary buoy 63 is not submerged by the water surface.

[0027] The bottom surface of the inner cavity of the buoy 2 is also provided with an exhaust mechanism 7, which can exhaust gas from the bottom of the outer wall of the buoy 2 while the vibration mechanism 5 generates vibration, thereby generating a large number of bubbles. After these bubbles are formed around the buoy 2, the contact area and friction between the buoy 2 and the silt are reduced, and the buoyancy of the buoy 2 is increased, thereby helping the buoy 2 to gradually separate from the silt.

[0028] The exhaust mechanism 7 includes: an air bag 701, an exhaust valve 702, an air inlet pipe 703, an air inlet valve 704, a sliding rod 705, a slider 706, a rack 707, a pressure plate 708, a connecting rod 709, a bracket 710, a first gear 711, a second gear 712, a transmission box 713 and a transmission wheel 714.

[0029] The airbag 701 is arranged at the bottom of the inner cavity of the float 2, and the air outlet valve 702 is arranged at the bottom of the outer wall of the float 2 and is connected with the airbag 701. The air outlet valve 702 adopts a one-way air valve, and the gas can only be released outward from the airbag 701. The released gas is discharged from the float 2 through the air outlet valve 702 to generate bubbles. At the same time, after being flattened, the airbag 701 can restore to its original state when no pressure is applied. The side wall of the airbag 701 is provided with an air inlet pipe 703, and the top of the air inlet pipe 703 extends out of the top of the outer wall of the float 2. At the same time, the top of the air inlet pipe 703 is provided with an air inlet valve 704, and the air inlet valve 704 adopts a gas-liquid isolation check valve to only allow gas to enter from the air inlet valve 704. The airbag 701 is inflated by the air intake pipe 703 and the air intake valve 704 by utilizing the self-restoring property of the airbag 701. The slide bar 705 is arranged in the inner cavity of the buoy 2 along the axial direction of the buoy 2. The slider 706 is slidably arranged on the slide bar 705. The rack 707 is arranged on the bottom surface of the slider 706. The bottom end of the pressure plate 708 is hinged to the bottom end of the inner wall of the buoy 2 and is located on one side of the airbag 701. The two ends of the connecting rod 709 are respectively hinged to the slider 706 and the pressure plate 708. The bracket 710 is arranged on the inner wall of the buoy 2. The first gear 711 is rotatably arranged on the top of the bracket 710, and the first gear 711 is connected to the rack 707. The second gear 712 is meshed with the first gear 711 coaxially arranged at the top of the bracket 710, the transmission box 713 is arranged on the bracket 710, the transmission box 713 is connected to the second output shaft 32, the transmission wheel 714 is arranged on the output shaft of the transmission box 713, the transmission wheel 714 and the second gear 712 are located on the same vertical plane, and the transmission box 713 uses two bevel gears to change the direction of the output power by 90 degrees, which belongs to the prior art. When the transmission wheel 714 rotates to a certain number of revolutions, the transmission wheel 714 will mesh with the second gear 712. When the transmission wheel 714 is lower than a certain number of revolutions and stops, the transmission wheel 714 is separated from the second gear 712. The diameter of the transmission wheel 714 is smaller than the diameter of the second gear 712, ensuring that the transmission wheel 714 has a certain number of revolutions, so that the transmission wheel 714 is meshed with the second gear 712, reducing the forward speed of the slider 706 on the slide bar 705. In order to ensure that the airbag 701 can be deformed freely in the buoy 2, an air inlet and outlet are set on the outer wall of the buoy 2, and a gas-liquid isolation valve is also provided. At the same time, when the pressure plate 708 is at the maximum limit of the pressure holding, that is, the gas in the airbag 701 is completely released, the first gear 711 is located at the end of the rack 707, and the first gear 711 continues to rotate. The first gear 711 will lose the meshing with the rack 707, and the rack 707 will no longer move.

[0030] The transmission wheel 714 includes: a housing 7141 , at least two claws 7142 and at least two second restoring members 7143 .

[0031] The shell 7141 is a cylindrical cavity structure and is connected to the output end of the transmission box 713. At least two through grooves are opened on the annular outer wall of the shell 7141 and connected to the cavity. At least two claws 7142 are installed in the inner cavity of the shell 7141 in a mirror-image manner, and the outer ends of the two claws 7142 can be rotated to the outside of the shell 7141 and mesh with the tooth grooves of the second gear 712. At least two second reset members 7143 are arranged between at least two claws 7142 and the shell 7141, so that at least two claws 7142 are in the shell 7141 when the shell 7141 stops rotating and reaches a certain number of revolutions, so that the transmission wheel 714 is in a separated state from the second gear 712, and the second reset button can adopt a spring or other structure.

[0032] Working principle: When a spring motor is used, it is necessary to store power for the spring motor, and the spring motor is charged during regular inspections of the gate. When the buoy 2 is stuck in the silt and the water level rises, the auxiliary buoy 63 is gradually submerged as the water level rises, and the auxiliary buoy 63 floats up, and the magnet 64 is separated from the bottom plate 61. The traction rope 65 is tightened to release power from the spring motor. At this time, the first output shaft 31 and the second output shaft 32 rotate simultaneously, and the cam 4 rotates with the first output shaft 31. The outer edge of the cam 4 abuts against the side wall of the baffle 56, driving the swing arm 54 to deflect, and the reed 53 bends and stores power. When the cam 4 is separated from the baffle 56, under the action of the reed 53, the striking hammer 55 strikes the vibration plate 52, and the vibration plate 52 vibrates and is transmitted to the outer wall of the buoy 2. When the multiple vibration mechanisms 5 generate vibrations respectively When the vibration intensity is superimposed, the vibration intensity of the outer wall of the buoy 2 is increased, and the buoy 2 is separated from the silt. At the same time, the second output shaft 32 rotates to drive the transmission wheel 714 to rotate. When the number of revolutions reaches the threshold, the outer ends of the two claws 7142 are thrown out of the outer wall of the shell 7141 and mesh with the second gear 712. The second gear 712 and the first gear 711 rotate synchronously, and the slider 706 slides on the slide rod 705. As the slider 706 moves, the distance between the slider 706 and the pressure plate 708 gradually decreases. In conjunction with the connecting rod 709, the angle between the pressure plate 708 and the inner wall of the buoy 2 gradually decreases, and the air bag 701 is compressed. The gas is discharged from the buoy 2 through the outlet valve 702, and bubbles are generated at the bottom of the outer wall of the buoy 2. The bubbles and vibration effects are used to cause the buoy 2 to separate from the silt.

[0033] When the buoy 2 is separated from the silt, the buoy 2 rises to the water surface, the gate is in an open state, and the top of the outer wall of the buoy 2 is above the water surface. At this time, the auxiliary buoy 63 is fixed to the bottom plate 61 in cooperation with the magnet 64, and the traction rope 65 is in a released state. The power source 3 stops outputting power, the first output shaft 31 and the second output shaft 32 stop rotating, and the vibration stops. At the same time, the airbag 701 has a tendency to return to its original state, and the push plate 708 and the slider 706 both have a tendency to move in the opposite direction, so that the second gear 712 and the claw 7142 are separated. As the airbag 701 recovers, the gas enters the airbag 701 from the inlet valve 704 to complete the inflation, completing one operation cycle.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A disc lifting ecological buoy gate, comprising: A gate body (1) and a buoy (2), wherein the buoy (2) is arranged below the side wall of the gate body (1), and is characterized by comprising: A power source (3) is installed on the outer wall of the buoy (2), and the power source (3) has two output ends, namely a first output shaft (31) and a second output shaft (32); A cam (4) disposed on the first output shaft (31); A vibration mechanism (5) is arranged on the inner wall of the buoy (2); A starting mechanism (6) is arranged at the top end of the outer wall of the buoy (2); The vibration mechanism (5) comprises: A support rod (51) is arranged on the inner wall of the buoy (2) along the axial direction of the buoy (2); A vibration plate (52) is arranged on the inner wall of the buoy (2) along the radial direction of the buoy (2); A reed (53) is arranged on the support rod (51), and the reed (53) and the vibration plate (52) are in the same extension direction; A swing arm (54), the top end of the swing arm (54) being arranged at the top end of the reed (53); A striking hammer (55) is arranged at the bottom end of the swing arm (54); a baffle (56), the baffle (56) being arranged at the top end of the swing arm (54), and the baffle (56) and the leaf spring (53) being in the same extending direction; a lever (57), the lever (57) being hinged to the top end of the swing arm (54) and being located on one side of the baffle (56), and the outer edge of the cam (4) being in contact with the lever (57); A first restoring member (58), wherein the first restoring member (58) is arranged between the shifting rod (57) and the swing arm (54).

2. The disc lifting ecological buoy gate according to claim 1 is characterized by: There is a gap between the striking hammer (55) and the vibration plate (52).

3. The disc lifting ecological buoy gate according to claim 1 is characterized by: The number of the vibration mechanism (5) is at least one, and the number of the cams (4) matches the number of the vibration mechanisms (5).

4. The disc lifting ecological buoy gate according to claim 3 is characterized by: When the number of the vibration mechanisms (5) is greater than one, the natural frequency of the vibration plates (52) in each of the vibration mechanisms (5) is consistent, the distance between each of the striking hammers (55) and the vibration plates (52) is the same, the parameters of each of the reeds (53) are completely consistent, each of the cams (4) is driven by the same power source (3), and the angles generated between each of the adjacent cams (4) are the same.

5. The disc lifting ecological buoy gate according to claim 1 is characterized in that: The starting mechanism (6) comprises: A bottom plate (61) is arranged on the top of the annular outer wall of the buoy (2), and the bottom plate (61) is made of ferromagnetic metal; At least two guide rods (62) are arranged on the bottom plate (61); An auxiliary buoyancy box (63) is located directly above the bottom plate (61), and the auxiliary buoyancy box (63) is slidably disposed on at least two of the guide rods (62); A magnet (64) is arranged at the bottom of the auxiliary buoyancy tank (63); A traction rope (65) is arranged between the auxiliary buoy (63) and the power source (3).

6. The disc lifting ecological buoy gate according to claim 5 is characterized by: When the auxiliary buoyancy box (63) is completely immersed in water, the buoyancy generated is greater than the attraction between the magnet (64) and the bottom plate (61).

7. The disc lifting ecological buoy gate according to claim 5 is characterized by: The movable distance of the auxiliary buoy (63) is smaller than the axial length of the guide rod (62).

Images