Anti-backflushing well

Abstract

The invention discloses an anti-backflushing well, and relates to the technical field of drainage buildings. The well lid comprises a well base, a well lid body and a floating mechanism, the well base is provided with a locking structure, the well lid body is provided with a locking groove, the locking structure is movably connected with the well base, the floating mechanism is connected with the locking structure, and when the liquid level in a well floats upwards, the floating mechanism pushes the locking structure to move, so that the locking structure is inserted into the locking groove to lock the well lid body. The locking structure is matched with the locking groove to lock the well lid and prevent the well lid from being separated from the well base. The locking structure is pushed to move through the floating mechanism, so that the locking structure in the well base is inserted into the locking groove in the well lid, the well lid and the well base are connected into a whole, the effect of fixing the well lid and the well base is achieved, the well lid is prevented from being separated from the well base, and the effect of preventing pedestrians from falling into a well is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of drainage buildings, and in particular provides an anti-rebound well. Background Art

[0002] Affected by global warming, extreme weather is gradually appearing in all parts of the country. For example, the heavy rains in many cities have exceeded the drainage threshold designed for the city. When the rainfall exceeds the drainage threshold, the excessive pressure in the drainage pipe will cause the water to flow back out of the wellhead and out of the ground. When the water flows out of the drainage pipe and out of the ground, it will cause the manhole cover to detach from the wellhead, leaving the wellhead open. If pedestrians pass by at this time, they may step on the air and fall into the well, which may easily cause casualties. Especially when heavy rain causes water to accumulate on the road, it is difficult for pedestrians to observe the location of the wellhead, and pedestrians are more likely to fall into the wellhead. Summary of the invention

[0003] The invention provides an anti-recoil well, which is used to solve the problem that the water flow in the drainage pipe washes the well cover away from the well mouth, causing pedestrians to fall from the well mouth and cause casualties.

[0004] The technical solution of the present invention is as follows:

[0005] A recoil-proof well comprises a well seat, a well cover and a floating mechanism, wherein the well seat is provided with a locking structure, the well cover is provided with a locking groove, the locking structure is movably connected to the well seat, and the floating mechanism is connected to the locking structure. When floating on the liquid surface in the well, the floating mechanism pushes the locking structure to move so that the locking structure is inserted into the locking groove to lock the well cover, and the locking structure cooperates with the locking groove to lock the well cover to prevent the well cover from detaching from the well seat.

[0006] In this solution, when the water level in the well rises, the floating mechanism will float up with the water level, and during the floating process, the locking structure will be pushed into the locking slot. After the locking structure is inserted into the locking slot, the well seat and the well cover are locked together, which can prevent the well cover from being separated from the well seat. After the well cover and the well seat are locked together, the water flow in the drainage pipe cannot flush the well cover from the well, ensuring that the well cover is on the well seat, which can prevent pedestrians from falling into the well and getting injured.

[0007] Preferably, the locking structure includes a slider, a connecting rod and a lifting piston, the well seat is provided with a first sliding hole for the slider to slide and a second sliding hole for the lifting piston to slide, the slider is slidably arranged in the first sliding hole, the lifting piston is arranged in the second sliding hole, the first sliding hole is connected to the locking groove, the axis of the second sliding hole is vertically arranged, the top of the lifting piston is hinged to one end of the connecting rod, and the other end of the connecting rod is hinged to the slider, and the floating mechanism pushes the lifting piston to move upward when floating.

[0008] In this solution, because the second sliding hole is arranged vertically, when the floating mechanism is floating, it can push the lifting piston to move upward, and the lifting piston is connected to the slider through a connecting rod, so the lifting piston can stably push the slider to move toward the locking groove when it moves upward, thereby locking the manhole cover. The connecting rod can ensure that the lifting piston can stably push the slider, thereby improving stability.

[0009] In order to solve the problem that the height of the lifting piston cannot be lowered, resulting in the slider locking the manhole cover and making it unable to be opened, the well seat is provided with an operating hole, the operating hole is coaxial with the second sliding hole, the bottom end of the operating hole is connected to the second sliding hole, and the top end of the operating hole passes through the top surface of the well seat, and the operating hole is used to insert a tool to push the lifting piston downward to unlock the manhole cover.

[0010] In this solution, a stick-shaped tool can be inserted into the operating hole to push the lifting piston downward from top to bottom. The lifting piston moves downward, and the slider is dragged by the connecting rod to move, so that the slider leaves the lock slot, thereby unlocking the manhole cover. The method of pushing the lifting piston to move through the operating hole is simple and efficient, and the lock of the manhole cover can be quickly unlocked manually.

[0011] Preferably, the diameter of the operating hole is smaller than the diameter of the second sliding hole, and is used to restrict the rising height of the lifting piston.

[0012] In this solution, the lifting piston cannot enter the operating hole when moving upward, which can avoid the problem of the lifting piston being separated from the operating hole due to excessive thrust. At the same time, it also avoids the lifting piston entering the operating hole and causing the connecting rod to bend and deform.

[0013] In order to prevent foreign matter from entering through the operating hole and blocking the second sliding hole and the first sliding hole, a plug is provided on the top of the operating hole.

[0014] In this solution, the plug can block the top of the operating hole to prevent external dust and impurities from entering from the top of the operating hole.

[0015] When the water level in the well continues to rise to the position of the manhole cover, the manhole cover will also be subjected to the upward force of the water flow. In order to prevent the manhole cover from being subjected to the force of the water flow and causing the slider to exit the locking groove, the first sliding hole is inclined, and the height of the first sliding hole close to the manhole cover is lower than the height of the end away from the manhole cover. When the manhole cover is subjected to the upward force from the water flow, the slider is subjected to the upward force of the manhole cover, and the slider transmits the upward force to the lifting piston through the connecting rod. The lifting piston is subjected to the upward force from the connecting rod and will not move downward, thereby achieving a self-locking effect of the lifting piston.

[0016] In this solution, after the slider enters the locking groove, one end of the connecting rod will enter the first sliding hole, and the lifting piston will reach the end of the first sliding hole away from the manhole cover. At this time, the height of the end of the connecting rod connected to the lifting piston will be higher than the height of the end connected to the slider. Therefore, the force applied to the slider will push the connecting rod and the lifting piston to move upward, while the lifting piston cannot move upward, and the lifting piston can only move downward to disengage the slider from the locking groove. Therefore, the force applied by the slider to the lifting piston prevents the lifting piston from moving downward, so that the lifting piston, the connecting rod and the slider are in a self-locking state, and the slider cannot leave the manhole cover, so that the locking effect of the manhole cover can remain stable. The problem of the manhole cover being opened due to the slider being disengaged from the locking groove by the force of the water flow is solved.

[0017] Preferably, the floating mechanism includes a guide rod and a float, the guide rod is vertically arranged in the well, the guide rod is coaxial with the second slide, the float is a cylindrical structure, and the float is sleeved in the guide rod. When the float floats, the top of the float pushes the lifting piston to move upward.

[0018] In this solution, a guide rod is provided for the float to ensure that the buoyancy can be stably transmitted to the lifting piston.

[0019] Preferably, the top end of the guide rod is inserted into the second sliding hole, and the top end of the guide rod is used to restrict the descending height of the lifting piston.

[0020] In this solution, the guide rod can constrain the lowest position of the lifting piston, and can prevent the lifting piston from falling from the bottom of the second sliding hole. Because the lifting piston is connected to the slider through a connecting rod, when the lowest position of the lifting piston is constrained, the position of the slider is also constrained.

[0021] Preferably, the anti-rebound well includes at least two floating mechanisms, each floating mechanism is provided with a locking structure at a position corresponding to the well seat, and each locking structure is provided with a locking groove at a position corresponding to the well cover.

[0022] In this solution, the more floating mechanisms are provided, the more stress points the manhole cover has, so that the manhole cover can be locked more securely.

[0023] Preferably, a connecting portion is provided between each float, the connecting portion connects each float into one body, and the connecting portion is used to increase the buoyancy of the float.

[0024] In this solution, the connection portion is provided to increase the buoyancy of the floats, ensuring that each float can push the lifting piston to move upward.

[0025] Beneficial effects of the present invention:

[0026] The present invention pushes the locking structure to move through the floating mechanism, so that the locking structure in the well seat is inserted into the locking groove on the well cover, so that the well cover and the well seat are connected as a whole, which plays the effect of fixing the well cover and the well seat, preventing the well cover from detaching from the well seat, and also plays the effect of preventing pedestrians from falling into the well. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solution of the present invention, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 It is a cross-sectional view of the first embodiment from a main viewing angle;

[0029] Figure 2 for Figure 1 A partial enlarged view of the middle part;

[0030] Figure 3 for Figure 2 Schematic diagram of the middle slider after it moves to the lock slot;

[0031] Figure 4 is a top cross-sectional view of the second sliding hole, the groove and the first sliding hole in the first embodiment;

[0032] Figure 5 A cross-sectional view of the second embodiment from a main viewing angle;

[0033] Figure 6 It is a cross-sectional view of the main viewing angle of the third embodiment;

[0034] Figure 7 It is a partial cross-sectional view of the manhole cover of Example 4.

[0035] In the above drawings, the corresponding reference numerals are as follows:

[0036] 1. Well seat; 2. Locking structure; 3. Well cover; 4. Float; 5. First sliding hole; 6. Plug; 7. Operating hole; 8. Groove; 9. Second sliding hole; 10. Guide rod; 11. Connecting part; 12. Indicator light; 13. Liquid level switch; 14. Battery compartment; 21. Slider; 22. Connecting rod; 23. Lifting piston. DETAILED DESCRIPTION

[0037] In conjunction with the accompanying drawings, the technical solution of the present invention is clearly and completely described through specific implementation methods of the embodiments of the present invention.

[0038] Embodiment 1:

[0039] like Figure 1As shown, the first embodiment of the present invention provides an anti-recoil well, including a well cover 3, a well seat 1 and a floating mechanism, the well seat 1 is fixed to the well mouth, and the well cover 3 is covered on the well seat 1. The well seat 1 is a ring-shaped metal structure, which is fixed to the well mouth by pouring concrete. A locking structure 2 is provided on the well seat 1, and the locking structure 2 is movably connected to the well seat 1. A locking groove is provided at the position corresponding to the well cover 3 and the locking structure 2. The locking structure 2 can move relative to the well seat 1 into the locking groove to lock the relative position of the well cover 3 and the well seat 1, and the locking structure 2 can also withdraw from the locking groove to unlock the lock between the well cover 3 and the well seat 1. The floating mechanism is used to push the locking structure 2 to move. When the liquid level in the well rises, the floating mechanism will rise with the liquid level. The floating mechanism will push the locking structure 2 to move toward the locking groove, and push the locking structure 2 into the locking groove before the liquid level rises to the position of the well cover 3. After the locking structure 2 locks the relative position of the well cover 3 and the well seat 1, the water flow in the well cannot flush the well cover 3 open.

[0040] like Figure 2 and Figure 3 As shown, the locking structure 2 includes a slider 21, a connecting rod 22 and a lifting piston 23. The well seat 1 is constructed with a first sliding hole 5 and a second sliding hole 9. The slider 21 is slidably arranged in the first sliding hole 5, and the axial direction of the first sliding hole 5 faces the locking groove. The dimension of the slider 21 along the axial direction of the first sliding hole 5 is greater than the depth of the locking groove, so the slider 21 cannot completely enter the locking groove. When one end of the slider 21 slides into the locking groove, the other end of the slider 21 is always located in the first sliding hole 5, and the slider 21 fixes the position of the well cover 3 and the well seat 1 relatively. One end of the connecting rod 22 is hinged to the slider 21, and the other end of the connecting rod 22 is hinged to the lifting piston 23. The lifting piston 23 is slidably arranged in the second sliding hole 9, and the second sliding hole 9 is connected to the first sliding hole 5. In other words, the end of the first sliding hole 5 passes through the side wall of the second sliding hole 9 and is connected to the second sliding hole 9. The second slide hole 9 is vertically arranged. When the lifting piston 23 moves up and down along the second slide hole 9, the slider 21 is pulled by the connecting rod 22 and moves along the first slide hole 5. Because the first slide hole 5 needs to guide the slider 21 into the slide groove, the first slide hole 5 is inclined with the second slide hole 9. When the lifting piston 23 moves, the angle of the connecting rod 22 will change. In order to avoid the hole wall of the first slide hole 5 and the second slide hole 9 blocking the swing of the connecting rod 22, as shown in FIG. Figure 4 As shown, the hole walls of the first sliding hole 5 and the second sliding hole 9 are provided with grooves 8 for the connecting rod 22 to swing, and the width of the groove 8 is greater than the diameter of the connecting rod 22. When the lifting piston 23 is at the lowest position, the slider 21 is located outside the locking groove, and when the lifting piston 23 moves upward, the slider 21 moves toward the direction of the locking groove, and when the lifting piston 23 moves to the top of the second sliding hole 9, the slider 21 slides into the locking groove.

[0041] The second sliding hole 9 is vertically arranged so that the lifting piston 23 moves up and down in the vertical direction, and the moving path of the lifting piston 23 is adapted to the movement mode of the floating mechanism. Therefore, the floating mechanism is used to push the lifting piston 23 from the bottom, and when the liquid level in the well moves upward, the floating mechanism can push the lifting piston 23 upward to move the lifting piston 23 upward along the second sliding hole 9.

[0042] An operating hole 7 is provided on the well seat 1. The operating hole 7 is coaxial with the second sliding hole 9. The bottom of the operating hole 7 is connected to the second sliding hole 9, and the top of the operating hole 7 passes through the well seat 1. After the water level in the well drops, the height of the floating mechanism drops with the water level. Silt and other impurities may enter the first sliding hole 5 or the second sliding hole 9, causing the height of the lifting piston 23 to be unable to drop, and the sliding hole cannot be withdrawn from the lock groove. At this time, water can be poured from the operating hole 7 into the second sliding hole 9 to flush the silt, and then a metal stick, a wooden stick or other tool can be inserted into the operating hole 7 to push the lifting piston 23 downward from top to bottom. The lifting piston 23 can move downward by pulling the slider 21 out of the lock groove through the connecting rod 22, thereby unlocking the manhole cover 3.

[0043] The diameter of the operation hole 7 is smaller than the diameter of the second slide hole 9, and the diameter of the lifting piston 23 is adapted to the diameter of the second slide hole 9, so that the lifting piston 23 can only move along the axial direction of the second slide hole 9. Therefore, the lifting piston 23 cannot enter the operation hole 7, which can prevent the lifting piston 23 from entering the operation hole 7 due to the thrust of the float 4, causing the connecting rod 22 to be squeezed in the radial direction and deformed.

[0044] The first sliding hole 5 can be arranged horizontally or inclined.

[0045] When the first sliding hole 5 is tilted, the height of the end of the first sliding hole 5 close to the manhole cover 3 is higher than the height of the end far from the manhole cover 3. Moreover, when the slider 21 is located inside the lock groove, the heights of the two ends of the connecting rod 22 are also different, and the height of the end of the connecting rod 22 close to the manhole cover 3 is lower than the height of the other end. When the manhole cover 3 is subjected to the force of the water flow, the manhole cover 3 will tend to move upward, and the force exerted by the manhole cover 3 on the slider 21 is upward. Because the slider 21 slides into the lock groove tilted downward, the upward force exerted on the slider 21 will push the connecting rod 22 upward, and the connecting rod 22 will push the lifting piston 23 upward. The lifting piston 23 cannot fall due to the upward force, which makes the slider 21 unable to escape from the lock groove, and the force exerted by the manhole cover 3 on the slider 21 will make the slider 21 more stably located in the lock groove, and the slider 21, the connecting rod 22 and the lifting piston 23 achieve a self-locking effect, and the slider 21 can stably lock the manhole cover 3 through the self-locking effect.

[0046] The slider 21 may be a cuboid metal block, the locking groove may be a rectangular groove, and the lifting piston 23 may be a cylindrical structure or a prismatic structure.

[0047] The power for the lifting piston 23 to move upward comes from the floating mechanism, which includes a guide rod 10 and a float 4. The guide rod 10 is vertically arranged, and the top end of the guide rod 10 is inserted into the second slide hole 9. The float 4 is a cylindrical structure, and the float 4 is sleeved on the guide rod 10. The guide rod 10 can constrain the floating direction of the float 4, ensuring that the float 4 can stably push the lifting piston 23 to move. The reason why the float 4 is sleeved on the guide rod 10 instead of setting the float 4 at the bottom of the lifting piston 23 is that this setting method can increase the axial length of the float 4, so that the bottom of the float 4 contacts the liquid surface earlier, and pushes the lifting piston 23 upward earlier, so that the manhole cover 3 is in a locked state earlier. In addition, increasing the axial length of the float 4 can increase the buoyancy of the float 4, thereby ensuring that the float 4 has sufficient buoyancy to push the lifting piston 23 to move. The diameter of the top of the float 4 can be different from that of the bottom. Therefore, the top diameter of the float 4 can be smaller than the second slide hole 9, while the bottom diameter of the float 4 is larger than the second slide hole 9. This arrangement can increase the volume of the float 4, thereby increasing the buoyancy of the float 4.

[0048] The top end of the guide rod 10 is inserted into the second slide hole 9, which can play a role in restricting the lowest height of the lifting piston 23. When the lifting piston 23 moves downward to abut against the top end of the guide rod 10, the slider 21 is still located in the first slide hole 5, which can prevent the lifting piston 23 from continuing to move downward so that the slider 21 enters the second slide hole 9 and causes the position of the slider 21 to be stuck. Similarly, increasing the size of the slider 21 so that the slider 21 cannot enter the second slide hole 9 can also prevent the position of the slider 21 from being locked, but this method will cause the size of the slider 21 to be too large, so the force required to push the slider 21 will also increase, making it more difficult for the slider 21 to move. In addition, the weight of the lifting piston 23 is usually greater than the weight of the slider 21, which is used to prevent the slider 21 from automatically sliding into the lock groove, and the weight of the lifting piston 23 is greater than the weight of the slider 21, so the gravity of the lifting piston 23 will prevent the slider 21 from automatically sliding in the direction of the lock groove. Therefore, by constraining the lowest position of the lifting piston 23 through the guide rod 10, the slider 21 can be prevented from sliding into the second sliding hole 9, and the weight of the slider 21 and the lifting piston 23 can be controlled so that the weight of the slider 21 and the lifting piston 23 is as small as possible while maintaining sufficient strength, thereby facilitating the movement of the lifting piston 23 and the slider 21.

[0049] The bottom end of the guide rod 10 can be inserted into the bottom of the well.

[0050] The locking groove is arranged on the side of the manhole cover 3, and the slider 21 is inserted into the manhole cover 3 from the side, which can prevent the manhole cover 3 from detaching upward from the manhole seat 1. In order to improve the locking stability, locking grooves are arranged on both sides of the manhole cover 3, and the two locking grooves correspond to the two locking structures 2, and the two locking structures 2 correspond to the two floating mechanisms. When the two sides of the manhole cover 3 are subjected to force, it can be ensured that the manhole cover 3 cannot detach upward from the manhole seat 1.

[0051] Similarly, three, four or more locking grooves can be set on the manhole cover 3; and correspondingly, the manhole seat 1 also needs to be provided with three, four or more locking structures 2 corresponding to the locking grooves, and three, four or more floating mechanisms are also required in the well.

[0052] Embodiment 2:

[0053] The second embodiment provides an anti-recoil well, which is different from the first embodiment in that the shape of the guide rod 10 is different.

[0054] like Figure 5 As shown, the guide rod 10 in the second embodiment is U-shaped, one end of the guide rod 10 is inserted into the second sliding hole 9 , and the other end of the guide rod 10 is fixedly connected to the well seat 1 .

[0055] The advantage of this arrangement is that it controls the minimum height of the float 4. The bottom of the well is connected to the drainage pipe of the drainage system, and the U-shaped guide rod 10 can make the minimum height of the float 4 higher than the top height of the drainage pipe, so as to prevent weeds, plastic bags and other objects in the sewage of the drainage pipe from being entangled on the float 4 and the guide rod 10, and to prevent the guide rod 10 and the float 4 from causing resistance to drainage. At the same time, it ensures that the buoyancy of the float 4 will not be affected by debris.

[0056] Embodiment three:

[0057] The third embodiment provides an anti-rebound well, which is different from the first embodiment in that a connecting portion 11 is further provided between each float 4 .

[0058] like Figure 6 As shown, the connecting portion 11 adopts a hollow plastic structure, and the shape of the connecting portion 11 can be annular, and the outer ring of the annular connecting portion 11 is connected to each float 4. The connecting portion 11 is provided to increase the buoyancy of the float 4, ensuring that the float 4 can push the lifting piston 23 upward to move.

[0059] The third embodiment is also applicable to the second embodiment.

[0060] Embodiment 4:

[0061] The fourth embodiment provides an anti-rebound well, which is different from the first embodiment in that a warning light is provided on the well cover 3 .

[0062] like Figure 7As shown, the warning light is arranged on the top of the manhole cover 3. For example, a groove 8 is arranged on the top of the manhole cover 3, and the warning light is arranged in the groove 8. A battery compartment 14 and a liquid level switch 13 are arranged at the bottom of the manhole cover 3. Batteries are arranged in the battery compartment 14. The liquid level switch 13 is used to control whether the battery compartment 14 and the warning light are powered. When the liquid level in the well rises to the position of the manhole cover 3, the liquid level switch 13 is immersed in the liquid, so that the circuit of the warning light is connected and the warning light is turned on; when the liquid level drops, the liquid level switch 13 is separated from the liquid surface. At this time, the piezoelectric switch is not subjected to pressure and the warning light is turned off.

[0063] The function of the warning light is to remind pedestrians not to approach the manhole cover 3 , especially when the manhole cover 3 is submerged in water, the light of the warning light can warn pedestrians and prevent them from approaching the manhole cover 3 .

[0064] A signal output module can also be provided on the manhole cover 3. When the warning light is powered on, the signal output can send a signal to the outside. After receiving the signal, the municipal unit can know the water flow situation in the well and deal with it in time.

[0065] The fourth embodiment is also applicable to the second and third embodiments.

Claims

1. A backwash prevention well, characterized in that: The invention comprises a well seat (1), a well cover (3) and a floating mechanism, wherein the well seat (1) is provided with a locking structure (2), the well cover (3) is provided with a locking groove, the locking structure (2) is movably connected to the well seat (1), and the floating mechanism is connected to the locking structure (2). When floating on the liquid surface in the well, the floating mechanism pushes the locking structure (2) to move, so that the locking structure (2) is inserted into the locking groove to lock the well cover (3), and the locking structure (2) cooperates with the locking groove to lock the well cover (3) to prevent the well cover (3) from detaching from the well seat (1).

2. The anti-rebound well according to claim 1, characterized in that: The locking structure (2) comprises a slider (21), a connecting rod (22) and a lifting piston (23); the well seat (1) is provided with a first sliding hole (5) for the slider (21) to slide and a second sliding hole (9) for the lifting piston (23) to slide; the slider (21) is slidably arranged in the first sliding hole (5); the lifting piston (23) is arranged in the second sliding hole (9); the first sliding hole (5) is connected to the locking groove; the axis of the second sliding hole (9) is arranged vertically; the top of the lifting piston (23) is hinged to one end of the connecting rod (22); the other end of the connecting rod (22) is hinged to the slider (21); when the floating mechanism floats, it pushes the lifting piston (23) to move upward.

3. The anti-rebound well according to claim 2, characterized in that: The well seat (1) is provided with an operating hole (7), the operating hole (7) is coaxial with the second sliding hole (9), the bottom end of the operating hole (7) is connected with the second sliding hole (9), the top end of the operating hole (7) passes through the top surface of the well seat (1), and the operating hole (7) is used to insert a tool to push the lifting piston (23) downward to realize unlocking of the well cover (3).

4. The anti-rebound well according to claim 3, characterized in that: The diameter of the operating hole (7) is smaller than the diameter of the second sliding hole (9), and is used to restrict the rising height of the lifting piston (23).

5. The anti-rebound well according to claim 4, characterized in that: A plug (6) is arranged on the top of the operating hole (7).

6. The anti-rebound well according to claim 2, characterized in that: The first sliding hole (5) is arranged obliquely, and the height of the first sliding hole (5) at one end close to the manhole cover (3) is lower than the height at the end away from the manhole cover (3). When the manhole cover (3) is subjected to an upward force from the water flow, the sliding block (21) is subjected to an upward force from the manhole cover (3), and the sliding block (21) transmits the upward force to the lifting piston (23) through the connecting rod (22). The lifting piston (23) is subjected to the upward force from the connecting rod (22) and does not move downward, thereby achieving a self-locking effect of the lifting piston (23).

7. The anti-rebound well according to claim 2, characterized in that: The floating mechanism comprises a guide rod (10) and a float (4); the guide rod (10) is vertically arranged in the well; the guide rod (10) is coaxial with the second slideway; the float (4) is a cylindrical structure; the float (4) is sleeved in the guide rod (10); when the float (4) floats, the top of the float (4) pushes the lifting piston (23) to move upward.

8. The anti-rebound well according to claim 7, characterized in that: The top end of the guide rod (10) is inserted into the second sliding hole (9), and the top end of the guide rod (10) is used to restrict the descending height of the lifting piston (23).

9. The anti-rebound well according to claim 7, characterized in that: It comprises at least two floating mechanisms, each floating mechanism being provided with a locking structure (2) at a position corresponding to the well seat (1), and each locking structure (2) being provided with a locking groove at a position corresponding to the well cover (3).

10. The anti-rebound well according to claim 9, characterized in that: A connecting portion (11) is provided between each float (4), and the connecting portion (11) connects each float (4) into one body. The connecting portion (11) is used to increase the buoyancy of the float (4).

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