Automatic flood prevention device for pipe jacking working well

Abstract

The present invention discloses an automatic flood prevention device for a pipe jacking pit, comprising a flood prevention door and a pumping system. The flood prevention door comprises a door body, a door opening and closing mechanism, and a door opening and closing control system. The door body comprises a steel plate door and a door body water-stopping device fixed to the outer side of the steel plate door. The door body opening and closing mechanism comprises two opening and closing hydraulic cylinders symmetrically mounted on both sides above the cast-in-place opening ring, two motors mounted on the ends of the piston rods of the two opening and closing hydraulic cylinders, and two large telescopic rods mounted on the rotating shafts of the two motors and in the middle of the inner side of the steel plate door. The door body opening and closing control system comprises a water level monitor mounted at the bottom of the inner cavity of the jacking pipe and a door body controller mounted on the ground outside the pipe jacking pit. The pumping system comprises a sump provided at the bottom edge of the pipe jacking pit, a pump mounted in the sump, and a pump controller mounted on the ground outside the pipe jacking pit. The present invention can effectively seal the jacking pit quickly, safely, and reliably.

Description

Technical Field

[0001] The invention relates to an automatic flood prevention device for a pipe jacking working well. Background Art

[0002] As a municipal water supply and drainage civil construction method, pipe jacking construction can be divided into the jacking working pit part and the pipe jacking part. The jacking working pit is the working pit for pipe jacking and is the main working section. At the same time, the jacking working pit is also the operating space for major equipment and personnel.

[0003] When the jacking work well is located in an area with frequent rainy seasons, water may be flooded into the jacking work well due to the influence of the natural environment. When the water in the jacking work well flows back to the pipe jacking machine head, the pipe jacking machine may be corroded by water and suffer mechanical head short and damage.

[0004] To address this issue, traditional water-stopping methods primarily involve pumping water inside the well and stopping water outside the well. While this method reduces the risk of flooding the working well to a certain extent, it requires a significant amount of manpower and material resources for emergency rescue efforts during rainstorms, significantly hindering the work. Furthermore, for pipe jacking in low-lying areas, where rainwater cannot be effectively pumped out, manual work is required to seal the well, posing a certain safety risk. This method also suffers from issues such as slow speed and an insufficiently responsive mechanism, adversely affecting both personnel safety and mechanical protection. Summary of the Invention

[0005] The purpose of the present invention is to overcome the defects of the prior art and provide an automatic flood prevention device for a jacking working pit, which can fully ensure the effective sealing of the jacking tunnel door, has the characteristics of being fast, safe and reliable, and effectively prevents water in the jacking working pit from entering the interior of the jacking pipe and damaging the head of the jacking machine.

[0006] The object of the present invention is achieved as follows: an automatic flood prevention device for a pipe jacking working well is installed in the pipe jacking working well and includes a flood prevention door and a pumping system; the pipe jacking working well adopts a steel casing to form the well wall, and a jacking hole is opened on the side wall of the lower part of the well wall in the pipe jacking direction; a cast-in-place hole ring with an inner diameter larger than the outer diameter of the jacking pipe is provided on the inner side surface of the well wall at the jacking hole position, and a steel mounting ring with a limiting ring plate at the inner end is provided on the inner ring surface of the cast-in-place hole ring, so that the jacking pipe passes through the steel mounting ring, and a hole water stop ring with an inner diameter smaller than the outer diameter of the jacking pipe is installed on the inner side surface of the limiting ring plate of the steel mounting ring; wherein,

[0007] The flood prevention door includes a door body, a door body opening and closing mechanism, and a door body opening and closing control system;

[0008] The door body includes a steel plate door with a diameter larger than the inner diameter of the cast-in-place opening ring and a door body water-stop device fixed on the outer side of the steel plate door, the door body water-stop device includes a door body water-stop ring and a circle of water-expanding agent pre-buried on the outer side of the door body water-stop ring, the circle of water-expanding agent is in contact with the opening water-stop ring;

[0009] The door opening and closing mechanism includes two opening and closing hydraulic cylinders, two motors and two large telescopic rods; the two opening and closing hydraulic cylinders are installed on the inner side surface of the well wall and are symmetrically located on both sides above the cast-in-place hole ring; the two motors are installed one-to-one on the ends of the piston rods of the two opening and closing hydraulic cylinders; the rear ends of the fixed sections of the two large telescopic rods are installed one-to-one on the ends of the rotating shafts of the two motors, and the front ends of the movable sections of the two large telescopic rods are respectively hinged to the middle part of the inner side surface of the steel plate door through pile heads and are symmetrically located on both sides of the center of the steel plate door;

[0010] The door opening and closing control system includes a water level monitor and a door controller; the tunnel water level monitor is installed at the bottom of the inner cavity of the jacking pipe located in the steel mounting ring; the door controller is installed on the ground outside the jacking working shaft and is connected to the tunnel water level monitor and the two opening and closing hydraulic cylinders, two motors and two telescopic rods of the door opening and closing mechanism through signal lines; the door controller controls the synchronous extension and retraction of the piston rods of the two opening and closing hydraulic cylinders, the door controller controls the synchronous rotation of the two motors in opposite directions, and the door controller controls the synchronous extension and retraction of the two large telescopic rods; a manual control switch is also provided on the door controller;

[0011] The pumping system includes a sump located at the bottom edge of the jacking working pit and below one side of the cast-in-place opening ring, a water pump installed in the sump, and a water pump controller installed on the ground outside the jacking working pit. The water pump controller is connected to the water pump via a signal line.

[0012] The above-mentioned automatic flood prevention device for the jacking working pit, wherein the door body water stop ring is a stepped rubber water stop ring with a boss on the outer side surface, the diameter of the bottom of the boss of the door body water stop ring is larger than the outer diameter of the jacking pipe and smaller than the inner diameter of the steel mounting ring; the cross-section of the water-expanding agent is V-shaped and is pre-buried in the outer side surface of the bottom of the boss of the door body water stop ring.

[0013] The above-mentioned automatic flood prevention device for the jacking working shaft, wherein the door opening and closing mechanism also includes two small telescopic rods, the rear ends of the fixed sections of the two small telescopic rods are installed one-to-one on the rotating shafts of the two motors, and the ends of the movable sections of the two small telescopic rods are installed one-to-one on the fixed sections of the two large telescopic rods, so that the angle between the small telescopic rods and the horizontal direction is not greater than 45°; the two small telescopic rods are each connected to the door controller through a signal line.

[0014] The above-mentioned automatic flood prevention device for the jacking working shaft, wherein the bottom of the shaft wall is provided with a concrete bottom plate; the bottom of the cast-in-place opening ring is connected to the concrete bottom plate through a concrete reinforcement seat cast synchronously with the cast-in-place opening ring; the bottom of the concrete bottom plate is also provided with a crushed stone cushion layer.

[0015] The above-mentioned automatic flood prevention device for the jacking working shaft, wherein a door body limiting pile with a length less than the thickness of the cast-in-place hole ring is fixed on the shaft wall above the corresponding cast-in-place hole ring.

[0016] The automatic flood prevention device for the pipe jacking working well of the present invention is characterized by:

[0017] 1. The present invention adopts an automatic response mechanism of water level monitoring. By detecting the water level, it can identify the risk of flooding in the pipe jacking working pit, quickly activate the anti-flood door to automatically block the jacking hole, and effectively prevent the water in the pipe jacking working pit from entering the jacking pipe and damaging the head of the pipe jacking machine.

[0018] 2. The present invention adopts a flood-proof door to temporarily block the top-entry hole. The door body of the flood-proof door covers the top-entry hole by opening and closing the hydraulic cylinder, and a door body water-stopping device composed of a rubber water-stop ring and a water-expanding agent is provided on the outer side of the door body of the flood-proof door. The door body water-stopping device is pressed into close contact with the inner end face of the top-entry hole by opening and closing the hydraulic cylinder and the water pressure in the well, thereby further ensuring the sealing and water-stopping effect of the flood-proof door.

[0019] 3. The present invention uses water inflow sensing in the jacking pipe, alarm outside the well, and manual activation of the anti-flooding device to avoid people entering the water well for operation and construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is an elevational view of the automatic anti-flooding device for the pipe jacking pit of the present invention (when the door is opened and the hole is pushed into);

[0021] Figure 2 It is a plan view of the door water-stopping device in the automatic flood prevention device of the jacking working shaft of the present invention;

[0022] Figure 3 It is a plan view of the automatic flood prevention device of the present invention when the door body is closed and pushed into the hole;

[0023] Figure 4 This is an elevation view of the automatic flood prevention device of the present invention when the door body is closed and pushed into the opening;

[0024] Figure 5 It is a side view of the automatic flood prevention device of the present invention (including two states: the door body is opened to push the hole and the door body is closed to push the hole);

[0025] Figure 6 It is an elevation view of the door body in the automatic flood prevention device of the present invention during movement. DETAILED DESCRIPTION

[0026] The present invention will be further described below with reference to the accompanying drawings.

[0027] See also Figures 1 to 6 The automatic flood prevention device of the jacking working well of the present invention is installed in the jacking working well. The jacking working well adopts a steel casing to form a well wall 10. The bottom of the well wall 10 is provided with a concrete bottom plate 11. The bottom of the concrete bottom plate 11 is provided with a crushed stone cushion layer 12. A jacking hole is opened on the side wall of the lower part of the well wall 10 in the direction of the pipe jacking. A cast-in-place hole ring 13 with an inner diameter larger than the outer diameter of the jacking pipe 100 is provided on the inner side surface of the well wall 10 at the position of the jacking hole. The bottom of the ring 13 is also connected to the concrete base plate 11 via a simultaneously cast concrete reinforcement seat 14. A steel mounting ring 15 with a limiting ring plate 150 at its inner end is provided on the inner annular surface of the cast-in-place opening ring 13, allowing the jacking pipe 100 to pass through the steel mounting ring 15. A hole water stop ring 16, whose inner diameter is smaller than the outer diameter of the jacking pipe 100, is mounted on the inner side of the limiting ring plate 150 of the steel mounting ring 15 via a nut 160 pre-embedded in the cast-in-place opening ring 13. A door limit stake 17, whose length is less than the thickness of the cast-in-place opening ring 13, is fixed to the well wall 10 above the corresponding cast-in-place opening ring 13.

[0028] The automatic flood prevention device for a pipe jacking working shaft of the present invention comprises a flood prevention door and a pumping system.

[0029] The flood prevention door comprises a door body 2, a door body opening and closing mechanism and a door body opening and closing control system.

[0030] The door body 2 includes a steel plate door 20 with a diameter larger than the inner diameter of the cast-in-place opening ring 13 and a door body water-stopping device fixed on the outer side surface of the steel plate door 20, and the door body water-stopping device includes a door body water-stopping ring 21 and a circle of water-expanding agent 22; the door body water-stopping ring 21 is a stepped rubber water-stopping ring with a boss on the outer side surface, and the diameter of the bottom of the boss of the door body water-stopping ring 21 is larger than the outer diameter of the jacking pipe 100 and smaller than the inner diameter of the steel mounting ring 15; the cross-section of the water-expanding agent 22 is V-shaped and is pre-buried in the outer side surface of the bottom of the boss of the door body water-stopping ring 21.

[0031] The door opening and closing mechanism includes two opening and closing hydraulic cylinders 31, two motors 32, two large telescopic rods 33 and two small telescopic rods 35; wherein, the two opening and closing hydraulic cylinders 31 are installed on the inner side of the well wall 10 and are symmetrically located on both sides above the cast-in-situ hole ring 13; the two motors 32 are installed on the ends of the piston rods of the two opening and closing hydraulic cylinders 31 in a one-to-one correspondence; the rear ends of the fixed sections of the two large telescopic rods 33 are installed on the ends of the rotating shafts of the two motors 32 in a one-to-one correspondence, and the front ends of the movable sections of the two large telescopic rods 33 are respectively It is hinged to the middle of the inner side surface of the steel door 20 through a pile head 34 and is symmetrically located on both sides of the center of the steel door 20; the large telescopic rod 33 adopts a hydraulic telescopic rod or an electric telescopic rod; the rear ends of the fixed sections of the two small telescopic rods 35 are mounted one-to-one on the rotating shafts of the two motors 32, and the ends of the movable sections of the two small telescopic rods 35 are mounted one-to-one on the fixed sections of the two large telescopic rods 33, so that the angle between the small telescopic rod 35 and the horizontal direction is not greater than 45°; the small telescopic rod 35 also adopts a hydraulic telescopic rod or an electric telescopic rod.

[0032] The door opening and closing control system includes a water level monitor 41 and a door controller. The tunnel opening water level monitor 41 is mounted at the bottom of the inner cavity of the jacking pipe 100, located within the steel mounting ring 15. The door controller is installed on the ground outside the jacking pit and is connected to the tunnel opening water level monitor 41 and the two hydraulic cylinders 31, two motors 32, two large telescopic rods 33, and two small telescopic rods 35 of the door opening and closing mechanism via signal lines 42. The door controller controls the synchronous extension and retraction of the piston rods of the two hydraulic cylinders 31, the synchronous rotation of the two motors 32 in opposite directions, the synchronous extension and retraction of the two large telescopic rods 33, and the synchronous extension and retraction of the two small telescopic rods 35. The door controller is also equipped with a manual control switch.

[0033] The pumping system includes a sump 50 located at the bottom edge of the jacking pit and below one side of the cast-in-place opening ring 13, a pump 51 installed in the sump 50, and a pump controller (not shown) installed on the ground outside the jacking pit. The bottom elevation of the sump 50 is lower than the elevation of the concrete base plate 11. The pump controller is connected to the pump 51 and the sump water level meter via a signal line 52. A sump water level meter (not shown) connected to the pump controller via a signal line can also be installed on the top of the sump 50. When the water level in the sump 50 exceeds the set value, the pump controller automatically starts the pump 51 to pump the water in the sump 50 out of the jacking pit.

[0034] The working principle of the automatic anti-flooding device of the pipe jacking working well of the present invention is:

[0035] When there is no water in the jacking working well, the door body 2 of the flood-proof door is located above the cast-in-situ hole ring 13, and the upper part of the door body 2 rests on the door body limit rod 17. The piston rods of the two opening and closing hydraulic cylinders 31 retract, and the two large telescopic rods 33 are rotated to the top of the cast-in-situ hole ring 13 through the two motors 32. The two large telescopic rods 33 and the two small telescopic rods 35 are all extended to the longest state, and the angles between the two large telescopic rods 33 and the horizontal direction are all α. The door body 2 will be pushed into the hole to open state (see Figure 1 ). During the rainy season when there is less rain, rainwater flows into the jacking working well and then flows into the sump 50. It is necessary to manually start the pump 51 through the pump controller to pump water irregularly to reduce the amount of water in the sump 50. When rain is frequent and the amount of rain is too heavy, the pump 51 is unable to pump water in time. When the water level in the jacking working well reaches the bottom of the jacking pipe 100 and is detected by the hole water level monitor 41, the door controller immediately starts the door 2 of the flood control door to move downward to block the jacking hole (see Figure 4 ), that is, the door body controller first starts the piston rods of the two opening and closing hydraulic cylinders 31 to extend, and pushes the door body 2 to the working surface that can move up and down, that is, pushes the door body 2 horizontally to the inner side of the cast-in-place hole ring 13, and then starts the two motors 32 to rotate synchronously in the opposite direction, and at the same time controls the two large telescopic rods 33 to shorten synchronously, so that the angle between the two large telescopic rods 33 and the horizontal direction gradually decreases from α to 0 (see Figure 6 ), at this time, the two large telescopic rods 33 are retracted to the shortest state, and then the two large telescopic rods 33 are controlled to extend synchronously, so that the angle between the two large telescopic rods 33 and the horizontal direction gradually increases from 0 to -α, that is, the rotation angle of the two motors 32 is 2α, so that the door body 2 moves downward; when the two opening and closing hydraulic cylinders 31 push the door body 2 out to the movable working surface, when the two large telescopic rods 33 and the two motors 32 are started, the rotation function relationship should be satisfied: l = L / cos(θ), where l is the extended length of the large telescopic rod 33, and the extended length l of the large telescopic rod 33 is L when it is the shortest; θ is the rotation angle of the large telescopic rod 33, and the initial state is shown in FIG. Figure 1 The termination status is shown in Figure 4, so θ∈(-a,a). When the door body 2 moves downward to align with the jacking hole, the door body controller controls the piston rods of the two opening and closing hydraulic cylinders 31 to retract synchronously, so that the door body 2 moves horizontally toward the jacking hole until it covers the jacking hole. At the same time, the two small telescopic rods 35 are controlled to retract synchronously to the shortest state, so that the two large telescopic rods 33 can also press the door body 2 horizontally toward the jacking hole. The water pressure in the jacking working well will also press the door body 2 horizontally toward the jacking hole. Because the cast-in-place hole ring 13 will produce errors during construction, the outer side of the door body 2 of the flood-proof door There may be a gap between the surface and the inner end face of the cast-in-situ hole ring 13. The gap between the surface and the inner end face of the cast-in-situ hole ring 13 is compressed by two small telescopic rods 35 and the door body water stop ring 21. The water-expanding agent 22 embedded on the outer side of the door body water stop ring 21 will also expand when it comes into contact with water and come into close contact with the bent part of the hole water stop ring 16 that is pushed out and bent by the jacking pipe 100, further enhancing the sealing and waterproof effect of the door body 2, and preventing the water in the jacking working well from entering the jacking pipe 100 and damaging the head of the jacking machine. When the hole water level monitor 41 detects that the water level has reached the inner bottom of the jacking pipe 100 and the automatic operation function of the door body controller fails, the door body controller alarms. At this time, the manual control switch on the door body controller is manually controlled on the surface to control the flood prevention door to close the jacking hole.

[0036] The automatic flood prevention device for the pipe jacking working pit of the present invention monitors the water level in the pipe jacking working pit through a water level monitor, and can then identify the flooding risk of the pipe jacking working pit, thereby quickly starting the flood prevention door to automatically close the jacking hole, effectively preventing the water in the pipe jacking working pit from entering the interior of the jacking pipe and damaging the head of the pipe jacking machine.

[0037] The above embodiments are only used to illustrate the present invention, rather than to limit the present invention. Those skilled in the art may make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should also fall within the scope of the present invention and should be defined by the claims.

Claims

1. An automatic flood prevention device for a pipe jacking work pit, which is installed in the pipe jacking work pit and includes a flood prevention door and a pumping system; the pipe jacking work pit adopts a steel casing to form the pit wall, and a jacking hole is opened on the side wall of the lower part of the pit wall in the direction of pipe jacking; a cast-in-place hole ring with an inner diameter larger than the outer diameter of the jacking pipe is provided on the inner side surface of the pit wall at the jacking hole position, and a steel mounting ring with a limiting ring plate at the inner end is provided on the inner ring surface of the cast-in-place hole ring, so that the jacking pipe passes through the steel mounting ring, and a hole water stop ring with an inner diameter smaller than the outer diameter of the jacking pipe is installed on the inner side surface of the limiting ring plate of the steel mounting ring; it is characterized in that The flood prevention door includes a door body, a door body opening and closing mechanism, and a door body opening and closing control system; The door body includes a steel plate door with a diameter larger than the inner diameter of the cast-in-place opening ring and a door body water-stop device fixed on the outer side of the steel plate door, the door body water-stop device includes a door body water-stop ring and a circle of water-expanding agent pre-buried on the outer side of the door body water-stop ring, the circle of water-expanding agent is in contact with the opening water-stop ring; The door opening and closing mechanism includes two opening and closing hydraulic cylinders, two motors and two large telescopic rods; the two opening and closing hydraulic cylinders are installed on the inner side surface of the well wall and are symmetrically located on both sides above the cast-in-place hole ring; the two motors are installed one-to-one on the ends of the piston rods of the two opening and closing hydraulic cylinders; the rear ends of the fixed sections of the two large telescopic rods are installed one-to-one on the ends of the rotating shafts of the two motors, and the front ends of the movable sections of the two large telescopic rods are respectively hinged to the middle part of the inner side surface of the steel plate door through pile heads and are symmetrically located on both sides of the center of the steel plate door; The door opening and closing control system includes a tunnel water level monitor and a door controller; the tunnel water level monitor is installed at the bottom of the inner cavity of the jacking pipe located in the steel mounting ring; the door controller is installed on the ground outside the jacking working shaft and is connected to the tunnel water level monitor and the two opening and closing hydraulic cylinders, two motors and two telescopic rods of the door opening and closing mechanism through signal lines; the door controller controls the synchronous extension and retraction of the piston rods of the two opening and closing hydraulic cylinders, the door controller controls the synchronous rotation of the two motors in opposite directions, and the door controller controls the synchronous extension and retraction of the two large telescopic rods; a manual control switch is also provided on the door controller; The pumping system includes a sump located at the bottom edge of the jacking working pit and below one side of the cast-in-place opening ring, a water pump installed in the sump, and a water pump controller installed on the ground outside the jacking working pit. The water pump controller is connected to the water pump via a signal line.

2. The automatic flood prevention device for a pipe jacking pit according to claim 1, characterized in that: The door body water stop ring is a stepped rubber water stop ring with a boss on the outer side. The diameter of the bottom of the boss of the door body water stop ring is larger than the outer diameter of the jacking pipe and smaller than the inner diameter of the steel mounting ring; the cross-section of the water-expanding agent is V-shaped and is pre-buried on the outer side surface of the bottom of the boss of the door body water stop ring.

3. The automatic flood prevention device for a pipe jacking pit according to claim 1, characterized in that: The door opening and closing mechanism also includes two small telescopic rods, the rear ends of the fixed sections of the two small telescopic rods are installed one-to-one on the rotating shafts of the two motors, and the ends of the movable sections of the two small telescopic rods are installed one-to-one on the fixed sections of the two large telescopic rods, so that the angle between the small telescopic rods and the horizontal direction is not greater than 45°; the two small telescopic rods are each connected to the door controller through a signal line.

4. The automatic flood prevention device for a pipe jacking pit according to claim 1, characterized in that: A concrete bottom plate is provided at the bottom of the well wall; the bottom of the cast-in-situ hole ring is connected to the concrete bottom plate through a concrete reinforcement seat cast synchronously with the cast-in-situ hole ring; and a crushed stone cushion layer is also provided at the bottom of the concrete bottom plate.

5. The automatic flood prevention device for a pipe jacking pit according to claim 1, characterized in that: A door body limiting pile with a length less than the thickness of the cast-in-situ hole opening ring is fixed on the well wall above the corresponding cast-in-situ hole opening ring.

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