Sunken basement reinforcing anti-floating device

Abstract

The invention relates to the field of basement reinforcing anti-floating devices, in particular to a sunken basement reinforcing anti-floating device which comprises a positioning rod, a bearing plate is welded to the center of the bottom end face of the positioning rod, the bottom of the bearing plate makes contact with the bottom plane of an anchor hole, and first annular grooves are formed in the outer wall of the positioning rod in the vertical direction at equal intervals; an annular rack is fixedly mounted in each first annular groove; the outer wall of the positioning rod is sleeved with an anti-floating pipe, placing holes are formed in the outer wall of the anti-floating pipe and located at the same height of any first annular groove, the multiple placing holes in the same horizontal plane are distributed at equal angles in the circumferential direction, and a cylindrical driving block is rotationally installed in each placing hole through a shaft rod; a tooth block is arranged in a partial area of the middle position of the outer wall of the cylindrical driving block, the tooth block is meshed with the annular rack, a positioning piece is arranged on the outer wall of the area, without the tooth block, of the cylindrical driving block, and the overall section of the positioning piece is arc-shaped; the anti-floating structure has the characteristic of good anti-floating effect.

Description

Technical Field

[0001] The invention relates to the field of basement reinforcement and anti-floating devices, in particular to a sunken basement reinforcement and anti-floating device. Background Art

[0002] With the continuous development of urban construction, basements are increasingly widely used in buildings, and basement anti-floating technology is becoming more and more important. Basement anti-floating mainly refers to the floating, sinking or damage of the basement caused by the increase of soil moisture around the basement, which brings great harm to people's lives and property. Therefore, the research and application of basement anti-floating reinforcement technology is particularly important.

[0003] The anti-floating construction process of the basement is mainly implemented by means of anti-floating anchoring devices, specifically, a number of anchor holes are opened at the base of the basement, and the steel pipe fittings used for anti-floating are hoisted into the anchor holes in turn. After placement, concrete is poured into the gap between the two to stabilize them. In the above construction process, the impact force of the concrete itself during pouring can easily cause the steel pipe fittings to deviate. At the same time, the locking reverse direction of this method is vertical, and the horizontal locking force between the anti-floating anchor rod and the anchor hole is weak. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention provides a sunken basement reinforcement and anti-floating device.

[0005] The technical solution adopted by the present invention to solve the technical problem is: a sunken basement reinforcement anti-floating device, comprising a positioning rod, a supporting plate is welded in the center of the bottom end surface of the positioning rod, and the bottom of the supporting plate is in contact with the bottom plane of the anchor hole, and the outer wall of the positioning rod is provided with first annular grooves at equal intervals along the vertical direction thereof, and an annular rack is fixedly installed in each first annular groove; The outer wall of the positioning rod is sleeved with an anti-floating tube, and the outer wall of the anti-floating tube is provided with placement holes at the same height of any first annular groove. The multiple placement holes in the same horizontal plane are distributed at equal angles in the circumferential direction. A cylindrical driving block is installed in each placement hole through the rotation of the shaft rod. A tooth block is provided in a part of the outer wall of the cylindrical driving block at the center position, and the tooth block is meshed with the annular rack. A positioning piece is provided on the outer wall of the cylindrical driving block in the area where the tooth block is not provided, and the overall cross-section of the positioning piece is in the shape of an arc. The outer wall of the anti-floating pipe is provided with vertical grooves between two adjacent placement holes, each vertical groove is plugged with a grouting pipe, and the bottom of the grouting pipe does not contact the bottom end surface of the vertical groove.

[0006] Specifically, the positioning member includes a positioning rod, an inner bracket and an elastic sleeve, one end of the positioning rod is fixed to the outer wall of the cylindrical driving block, the inner bracket is fixedly installed on the end of the positioning rod, the inner bracket and the outer wall of the cylindrical driving block are sleeved with an elastic sleeve, and the elastic sleeve does not contact the gear block, a second annular groove is provided inside the annular rack, and a through hole is provided in the second annular groove on the side facing the cylindrical driving block, a positioning ring is sleeved inside the second annular groove, a blade is fixedly installed on the outer wall of the positioning ring, and the blade can contact the elastic sleeve through the through hole.

[0007] Specifically, the height of the positioning ring is smaller than the height of the second annular groove, the height of the elastic sleeve located in the outer area of ​​the cylindrical driving block is greater than the height of the blade, a limiting tube is fixedly installed at the bottom of the grouting tube, the outer wall of the limiting tube is in contact with the inner wall of the vertical groove but not connected, and the limiting tube and the positioning ring are both magnetic components.

[0008] Specifically, the tops of the plurality of grouting pipes are connected to a grouting cavity shell, and an external pipe is welded at the center of the top of the grouting cavity shell.

[0009] Specifically, the contact surfaces of the support plate and the anti-floating tube are both provided with semicircular ring grooves, and a steel ball is placed between the two semicircular ring grooves.

[0010] Specifically, the outer wall surface of the anti-floating tube is a frosted surface, and an anti-floating rod is welded on the top of the anti-floating tube, and the cross-section of the anti-floating rod is V-shaped.

[0011] Specifically, a steel wire rope is fixedly connected between the inner wall of the inner bracket and the outer wall of the cylindrical driving block. The steel wire rope is located in the inner chamber of the elastic sleeve, and the steel wire ropes at various positions are arranged in a staggered manner.

[0012] Specifically, the thickness of the elastic sleeve in the outer area of ​​the inner bracket is greater than that in other areas.

[0013] Specifically, the outer wall of the positioning rod is provided with placement grooves at equal angles in the circumference, a support spring is installed in the placement groove, a positioning block is provided at the end of the support spring, and the outer wall of the positioning block is close to the inner wall of the anti-floating tube, the inner wall of the anti-floating tube is provided with positioning grooves at equal angles in the circumference, and the positioning block and the positioning groove are located in the same horizontal plane.

[0014] Beneficial effects of the present invention: The present invention discloses a sunken basement reinforcement anti-floating device. During the rotation of the anti-floating tube, the cylindrical driving block and the tooth block can be driven to rotate together. The tooth block moves along the annular rack and meshes with each other, so that the cylindrical driving block rotates on the outer wall of the shaft rod. The rotation of the cylindrical driving block drives the positioning member to gradually leak out of the placement hole from the initial state until the positioning member is inserted into the base layer. After several positioning members are inserted into the base layer together, the position of the anti-floating tube can be locked. On the one hand, the centering degree of the anti-floating tube relative to the anchor hole can be improved, and on the other hand, the stability of the anti-floating tube in the anchor hole can be improved. When pouring concrete, the impact force of the concrete on the anti-floating tube will not cause it to be displaced. The position is locked in the horizontal direction to improve the overall anti-pullout effect.

[0015] The present invention discloses a sunken basement reinforcement anti-floating device. After any one of the anti-floating tube and the positioning rod rotates relative to each other, during the process of the positioning member entering into the base layer, the elastic sleeve on the outer wall of the cylindrical driving block contacts the blade after the cylindrical driving block rotates a certain angle. The elastic sleeve is separated from the cylindrical driving block under the action of its own elastic force. The inner bracket and the positioning rod are exposed in the concrete pouring area, that is, a hole of a certain size is formed in the base layer in the contact area with the positioning member. At this time, when pouring concrete, part of the concrete will enter into the inner bracket, so that the positions of the inner bracket and the positioning rod are also locked by the concrete, that is, the concrete can enter into the hole, further increasing the anti-floating effect of the present invention.

[0016] The present invention discloses a sunken basement reinforcement and anti-floating device. During the construction process of the present invention, the elastic sleeves at various positions are disconnected in sequence from bottom to top, so as to ensure that while the anti-floating effect of the present invention is increased, the elastic sleeves in the area where concrete is not poured are still located in the base layer. On the one hand, the contact area between the area and the base layer can be increased, and the stability of the anti-floating pipe is not affected. On the other hand, the elastic sleeves can prevent partial collapse in the base layer, so that the area of ​​the internal area of ​​the pit remains unchanged. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 It is a schematic diagram of the overall structure installation of the present invention; Figure 2 For the present invention Figure 1 Sectional view along the MM direction; Figure 3 For the present invention Figure 2 Schematic diagram of working status; Figure 4 It is a partial structural cross-sectional view of the present invention; Figure 5 For the present invention Figure 4 A partial enlarged schematic diagram of the middle A area; Figure 6 For the present invention Figure 1 Sectional view along the NN axis; In the figure: 1. positioning rod; 2. anti-floating pipe; 3. vertical groove; 4. grouting pipe; 11. supporting plate; 12. first annular groove; 13. annular rack; 21. placement hole; 22. cylindrical drive block; 23. tooth block; 24. positioning piece; 241. positioning rod; 242. inner bracket; 243. elastic sleeve; 244. wire rope; 131. second annular groove; 132. positioning ring; 133. blade; 134. through hole; 41. limiting tube; 42. injection chamber shell; 43. external tube; 51. placement groove; 52. positioning block; 53. support spring; 54. positioning groove. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0020] In addition, the terms used below are defined based on the functions of the present invention and may differ depending on the intention or custom of the user or operator. Therefore, these terms are defined based on the entire contents of this specification.

[0021] See also Figure 1-5 The present invention discloses a sunken basement reinforcement and anti-floating device, comprising a positioning rod 1, a supporting plate 11 is welded in the center of the bottom end face of the positioning rod 1, and the bottom of the supporting plate 11 is in contact with the bottom plane of the anchor hole, the outer wall of the positioning rod 1 is provided with first annular grooves 12 at equal intervals along its vertical direction, and an annular rack 13 is fixedly installed in each first annular groove 12, the positioning rod 1 and the anti-floating tube 2 are combined into an integral part, and the two can be placed in the anchor hole by hoisting, and when the supporting plate 11 is in contact with the bottom of the anchor hole, the designated installation position is reached; The outer wall diameter of the anti-floating tube 2 is smaller than the anchor hole diameter, and the gap area between the two is the concrete pouring area; The outer wall of the anti-floating tube 2 is provided with placement holes 21 at the same height of any first annular groove 12. The multiple placement holes 21 in the same horizontal plane are distributed at equal angles in the circumferential direction. A cylindrical driving block 22 is rotatably installed in each placement hole 21 through an axial rod. A tooth block 23 is provided in a part of the outer wall of the cylindrical driving block 22 at the center position, and the tooth block 23 is meshed with the annular rack 13. A positioning member 24 is provided on the outer wall of the cylindrical driving block 22 in the area where the tooth block 23 is not provided. The overall cross-section of the positioning member 24 is in the shape of an arc. In the initial state, the positioning member 24 is located in the placement hole 21, and the arc surface of the positioning member 24 is an inner concave surface. After the anti-floating tube 2 is placed in the anchor hole, the anti-floating tube 2 can be manually rotated relative to the positioning rod 1 (the positioning rod 1 can also be rotated relative to the anti-floating tube 2). This process needs to ensure that one of the anti-floating tube 2 and the positioning rod 1 is stationary relative to the other. During the rotation of the anti-floating tube 2, the cylindrical driving block 22 and the tooth block 23 are driven to rotate together. The tooth block 23 moves along the annular rack 13 and meshes with each other, so that the cylindrical driving block 22 rotates on the outer wall of the shaft rod. The rotation of the cylindrical driving block 22 drives the positioning member 24 to gradually leak out of the placement hole 21 from the initial state until the positioning member 24 is inserted into the base layer. After a number of positioning members 24 are inserted into the base layer together, the position of the anti-floating tube 2 can be locked. On the one hand, the centering degree of the anti-floating tube 2 relative to the anchor hole can be improved, and on the other hand, the stability of the anti-floating tube 2 in the anchor hole can be improved. When pouring concrete, the impact force of the concrete on the anti-floating tube 2 will not cause it to be displaced, which can improve the overall anti-pullout effect. At the same time, vertical grooves 3 are provided on the outer wall of the anti-floating tube 2 and between two adjacent placement holes 21, and a grouting pipe 4 is inserted into each vertical groove 3. The grouting pipe 4 is manually inserted into the vertical groove 3 before the anti-floating tube 2 is hoisted into the anchor hole, and follows the anti-floating tube 2 into the anchor hole, and the bottom of the grouting pipe 4 does not contact the bottom end surface of the vertical groove 3. After the position of the anti-floating tube 2 is locked, the distance between the bottom of the grouting pipe 4 and the bottom of the anchor hole is maintained between 1-1.5m. The distance value can be determined by measuring the grouting pipe 4 and the anti-floating tube 2. Concrete can be poured into the concrete pouring area through the grouting pipe 4, and the grouting pipe 4 needs to be pulled up at a uniform speed during the pouring process; The contact surfaces of the supporting plate 11 and the anti-floating tube 2 are both provided with semicircular ring grooves, and steel balls are placed between the two semicircular ring grooves. When the anti-floating tube 2 or the positioning rod 1 rotates, the mutual friction between the supporting plate 11 and the anti-floating tube 2 can be reduced by the steel balls.

[0022] In another embodiment, see Figure 1-Figure 5The positioning member 24 includes a positioning rod 241, an inner bracket 242 and an elastic sleeve 243. One end of the positioning rod 241 is fixed to the outer wall of the cylindrical driving block 22. The inner bracket 242 is fixedly installed at the end of the positioning rod 241. The inner bracket 242 and the outer wall of the cylindrical driving block 22 are sleeved with an elastic sleeve 243. The elastic sleeve 243 is a kind of elastic member and has elastic force in a tight state, and the elastic sleeve 243 does not contact the gear block 23. The inside of the annular rack 13 is provided with a second annular groove 131, and a through hole 134 is provided in the second annular groove 131 on the side facing the cylindrical driving block 22. The second annular groove 131 is internally sleeved with a positioning ring 132, and a blade 133 is fixedly mounted on the outer wall of the positioning ring 132, and the blade 133 passes through the through hole 134 and can contact the elastic sleeve 243. In the initial state, the blade 133 and the center of the cylindrical driving block 22 have a certain angle, and the angles between the adjacent blades 133 and the cylindrical driving block 22 at each position are the same. When the positioning member 24 enters the base layer, it can be understood that the elastic sleeve 243, the inner bracket 242 and the partial area of ​​the positioning rod 241 are inserted into the foundation pit, and the partial area of ​​the elastic sleeve 243 is sandwiched between the base layer and the inner bracket 242; Specifically, after any one of the anti-floating tube 2 and the positioning rod 1 rotates relative to each other, the positioning member 24 enters the base layer. After the cylindrical driving block 22 rotates by a certain angle (the angle is the same as the angle between the blade 133 and the cylindrical driving block 22 in the initial state mentioned above), the elastic sleeve 243 on its outer wall contacts the blade 133, and the blade 133 directly cuts off the elastic sleeve 243 in the contact area. The elastic sleeve 243 is separated from the cylindrical driving block 22 under the action of its own elastic force, and the inner bracket 242 and the positioning rod 1 are exposed in the concrete pouring area, that is, a hole of a certain size is formed in the base layer in the contact area with the positioning member 24. At this time, when pouring concrete, part of the concrete will enter the inner bracket 242, so that the positions of the inner bracket 242 and the positioning rod 1 are also locked by the concrete, that is, the concrete can enter the hole, further increasing the anti-floating effect of the present invention.

[0023] In another embodiment, see Figure 2-Figure 5The height of the positioning ring 132 is less than the height of the second annular groove 131, and the positioning ring 132 can move vertically along the inner wall of the second annular groove 131. The height of the elastic sleeve 243 located in the outer area of ​​the cylindrical driving block 22 is greater than the height of the blade 133. In the initial state, the horizontal height of the upper end surface of the blade 133 is lower than the horizontal height of the bottom end surface of the elastic sleeve 243. At this time, after any component of the anti-floating pipe 2 and the positioning rod 1 rotates relative to each other, the elastic sleeve 243 on the outer side of the cylindrical driving block 22 does not contact the blade 133 in the horizontal direction, and a limiting tube 41 is fixedly installed at the bottom of the grouting pipe 4. The outer wall of the limiting tube 41 contacts the inner wall of the vertical groove 3 but is not connected, and the limiting tube 41 and the positioning ring 132 are both magnetic components. Under the premise of keeping the distance between the bottom of the grouting pipe 4 and the bottom of the anchor hole between 1-1.5m, the bottom horizontal height of the grouting pipe 4 is lower than the anti-floating pipe 2 and the bottom horizontal height of the anchor hole. The bottom of the floating tube 2 is placed at the horizontal height of the hole 21. During the concrete pouring operation, the construction personnel drive the limit tube 41 to slide in the vertical groove 3 during the process of pulling the grouting tube 4. When the limit tube 41 is located on one side of the positioning ring 132, it drives it to rise in the second annular groove 131. After the positioning ring 132 rises, it drives the blade 133 to move together. The blade 133 rises and contacts the elastic sleeve 243 and cuts it off. In this way, the elastic sleeves 243 at each position are disconnected from bottom to top in sequence, thereby ensuring that the anti-floating effect of the present invention is increased. At the same time, the elastic sleeve 243 in the area where concrete is not poured is still located in the base layer. On the one hand, the contact area between the area and the base layer can be increased, and the stability of the anti-floating tube 2 is not affected. On the other hand, the elastic sleeve 243 can prevent the base layer (the base layer area where the positioning member 24 is inserted) from partially collapsing, so that the area of ​​the internal area of ​​the pit remains unchanged.

[0024] Furthermore, the thickness of the elastic sleeve 243 in the outer area of ​​the inner bracket 242 is greater than that in other areas. The elastic sleeve 243 in the outer area of ​​the inner bracket 242 will directly enter the inner side of the base layer. The high thickness ensures that it will not be damaged during the insertion process. Similarly, the thickness of the elastic sleeve 243 in the area in contact with the blade 133 is the thinnest, ensuring that the blade 133 can quickly cut off the elastic sleeve 243.

[0025] See also Figure 1 The tops of the multiple grouting pipes 4 are connected to a grouting chamber shell 42, and an external pipe 43 is welded at the center of the top of the grouting chamber shell 42. The external pipe 43 can be directly connected to the concrete pouring equipment. Grouting operations can be performed on multiple grouting pipes 4 at the same time through the external pipe 43, thereby improving the construction progress.

[0026] See also Figure 1 The outer wall surface of the anti-floating tube 2 is a frosted surface, which increases the contact area between the anti-floating tube 2 and the concrete, and an anti-floating rod is welded on the top of the anti-floating tube 2. The cross-section of the anti-floating rod is V-shaped. When pouring the basement floor, the anti-floating rod can be built into the floor concrete to increase the anti-floating effect.

[0027] See also Figure 2 A steel wire rope 244 is fixedly connected between the inner wall of the inner bracket 242 and the outer wall of the cylindrical driving block 22. The steel wire rope 244 is located in the inner chamber of the elastic sleeve 243, and the steel wire ropes 244 at each position are arranged in a staggered manner. When the concrete enters the pit, the staggered steel wire ropes 244 are located on the inner side of the concrete, thereby increasing the overall strength of the concrete at this location.

[0028] See also Figure 3-Figure 6 The outer wall of the positioning rod 1 is provided with placement grooves 51 at equal angles in the circumference, and a supporting spring 53 is installed in the placement groove 51. A positioning block 52 is provided at the end of the supporting spring 53, and the outer wall of the positioning block 52 is close to the inner wall of the anti-floating tube 2, and the inner wall of the anti-floating tube 2 is provided with positioning grooves 54 at equal angles in the circumference, and the positioning block 52 and the positioning groove 54 are located in the same horizontal plane. In the initial state, the positioning block 52 and the positioning groove 54 have a certain angle, and the size of the angle is equal to the deflection angle when the blade 133 contacts the elastic sleeve 243, that is, after the positioning block 52 is deflected to a certain angle, it will enter the positioning groove 54 under the push of the supporting spring 53, and the position of the anti-floating tube 2 and the positioning rod 1 is locked through the cooperation of the positioning block 52 and the positioning groove 54, which is convenient for construction personnel to judge the rotation angle of the anti-floating tube 2 on site, and the construction is more convenient.

[0029] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A sunken basement reinforcement and anti-floating device, comprising a positioning rod (1), characterized in that: A support plate (11) is welded in the center of the bottom end surface of the positioning rod (1), and the bottom of the support plate (11) contacts the bottom plane of the anchor hole. The outer wall of the positioning rod (1) is provided with first annular grooves (12) at equal intervals along its vertical direction, and an annular rack (13) is fixedly installed in each first annular groove (12); The outer wall of the positioning rod (1) is sleeved with an anti-floating tube (2), and a placement hole (21) is provided on the outer wall of the anti-floating tube (2) at the same height as any first annular groove (12). The plurality of placement holes (21) are distributed at equal angles in the circumferential direction in the same horizontal plane, and a cylindrical driving block (22) is installed in each placement hole (21) by rotation of an axial rod. A tooth block (23) is provided in a central portion of the outer wall of the cylindrical driving block (22), and the tooth block (23) meshes with the annular rack (13). A positioning member (24) is provided on the outer wall of the cylindrical driving block (22) in a region where the tooth block (23) is not provided, and the overall cross section of the positioning member (24) is in the shape of an arc. A vertical groove (3) is provided on the outer wall of the anti-floating tube (2) and between two adjacent placement holes (21), a grouting pipe (4) is inserted into each vertical groove (3), and the bottom of the grouting pipe (4) does not contact the bottom end surface of the vertical groove (3).

2. The anti-floating device for reinforcing a sunken basement according to claim 1, characterized in that: The positioning member (24) comprises a positioning rod (241), an inner bracket (242) and an elastic sleeve (243); one end of the positioning rod (241) is fixed to the outer wall of the cylindrical driving block (22); the inner bracket (242) is fixedly mounted on the end of the positioning rod (241); the inner bracket (242) and the outer wall of the cylindrical driving block (22) are sleeved with an elastic sleeve (243); the elastic sleeve (243) does not contact the tooth block (23); a second annular groove (131) is provided inside the annular rack (13); a through hole (134) is provided in the second annular groove (131) on a side facing the cylindrical driving block (22); a positioning ring (132) is sleeved inside the second annular groove (131); a blade (133) is fixedly mounted on the outer wall of the positioning ring (132); and the blade (133) passes through the through hole (134) and can contact the elastic sleeve (243).

3. The anti-floating device for reinforcing a sunken basement according to claim 2 is characterized by: The height of the positioning ring (132) is less than the height of the second annular groove (131); the height of the elastic sleeve (243) located in the outer area of ​​the cylindrical driving block (22) is greater than the height of the blade (133); a limiting tube (41) is fixedly installed at the bottom of the grouting tube (4); the outer wall of the limiting tube (41) contacts the inner wall of the vertical groove (3) but is not connected; and both the limiting tube (41) and the positioning ring (132) are magnetic components.

4. The anti-floating device for reinforcing a sunken basement according to claim 1 is characterized by: The tops of the plurality of grouting pipes (4) are connected to a grouting chamber shell (42), and an external pipe (43) is welded at the center of the top of the grouting chamber shell (42).

5. The anti-floating device for reinforcing a sunken basement according to claim 1 is characterized by: The contact surfaces of the support plate (11) and the anti-floating tube (2) are both provided with semicircular ring grooves, and a steel ball is placed between the two semicircular ring grooves.

6. The anti-floating device for reinforcing a sunken basement according to claim 1, characterized in that: The outer wall surface of the anti-floating tube (2) is a frosted surface, and an anti-floating rod is welded to the top of the anti-floating tube (2), and the cross-section of the anti-floating rod is V-shaped.

7. The anti-floating device for reinforcing a sunken basement according to claim 2, characterized in that: A steel wire rope (244) is fixedly connected between the inner wall of the inner bracket (242) and the outer wall of the cylindrical driving block (22); the steel wire rope (244) is located in the inner chamber of the elastic sleeve (243), and the steel wire ropes (244) at different positions are arranged in a staggered manner.

8. The anti-floating device for reinforcing a sunken basement according to claim 2, characterized in that: The thickness of the elastic sleeve (243) at the outer region of the inner support (242) is greater than the thickness of other regions.

9. The anti-floating device for reinforcing a sunken basement according to claim 1, characterized in that: The outer wall of the positioning rod (1) is provided with placement grooves (51) at equal angles in the circumferential direction, a support spring (53) is installed in the placement groove (51), a positioning block (52) is provided at the end of the support spring (53), and the outer wall of the positioning block (52) is closely attached to the inner wall of the anti-floating tube (2), and the inner wall of the anti-floating tube (2) is provided with positioning grooves (54) at equal angles in the circumferential direction, and the positioning block (52) and the positioning groove (54) are located in the same horizontal plane.

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