Abandoned pumping well grouting and sealing device

Abstract

The present invention relates to the field of waste well treatment devices. A grouting and sealing device for abandoned pumping wells includes a grouting mechanism and a cutterhead mechanism for cutting the well pipe. The cutterhead mechanism is detachably mounted on the bottom of the grouting mechanism. The grouting mechanism includes a main support pipe and a grouting pipe. The bottom of the main support pipe is provided with a closed grouting chamber, and the side wall of the grouting chamber is provided with a grouting port. The grouting pipe is arranged in the main support pipe, and the top of the grouting pipe extends out of the main support pipe, and the bottom of the grouting pipe extends into the grouting chamber. The side wall of the main support pipe is fixed with a baffle, which is located above the grouting port. The present invention cuts the well pipe port through the cutterhead mechanism, and the cement slurry is injected into the inner and outer filler layers of the pumping well through the grouting port, effectively filling and hardening the filler layer with cement slurry, effectively avoiding the subsequent spread of groundwater pollution caused by the unsealed filler layer in the abandoned well through the filler layer, thereby reducing the risk of layer-by-layer pollution in the abandoned pumping well.

Description

Technical Field

[0001] The invention relates to the field of waste well processing devices, and in particular to a grouting and sealing device. Background Art

[0002] Abandoned mines, drilled wells, or water wells should be sealed or backfilled. Currently, the main method of sealing and backfilling wells is backfilling with concrete. This involves backfilling the well with crushed stone, pressing steel plates, injecting cement slurry, pumping out water, pouring concrete, and sealing the opening with welding plates.

[0003] In the prior art, some relevant technical solutions and technical documents can be retrieved for the problem of sealing abandoned wells, such as:

[0004] The Chinese patent with publication number CN217630227U discloses a full-well sealing structure for abandoned water wells. The patent forms a stable geological structure through the in-situ soil layer, the first gravel interlayer, the clay soil layer, the second gravel interlayer and the cement slurry layer corresponding to the air-filling zone, the phreatic layer, the aquifer, the pressure layer and the bedrock respectively, avoiding groundwater infiltration pollution; the rod is inserted into the wellhead, and the baffle is limited by the vertical rod to increase the stability of the baffle installation and protect pedestrians. The insert ring can position and install the circular plate, and the baffle can be easily transported through the groove. The cover plate can cover the groove, and the top is covered with cement to prevent people from opening it.

[0005] Chinese patent publication number CN101255797B discloses a method for sealing quicksand grouting in mine shafts and a grouting pipe. This patent utilizes a grouting pipe to seal quicksand in mine shafts, enabling secondary grouting, thereby reducing the number of drill holes and eliminating leaky areas. The resulting sealing layer is strong and impermeable, requiring minimal energy, is easy to operate, and reduces rework and scrap rates. The method is suitable for sealing quicksand shaft walls in various mines.

[0006] While the aforementioned patents address their respective problems, they do not address the problem of groundwater contamination caused by the outer filler layer of abandoned pumping wells due to the lack of sealing. Addressing groundwater contamination caused by the outer filler layer during grouting and sealing of abandoned pumping wells is another challenge that urgently needs to be overcome. Summary of the Invention

[0007] In response to the problems existing in the prior art, the present invention provides a grouting and sealing device for an abandoned pumping well, which has solved at least one of the above-mentioned technical problems.

[0008] The technical solution of the present invention is: a grouting and sealing device for an abandoned pumping well, comprising a grouting mechanism, characterized in that it also comprises a cutterhead mechanism for cutting the well pipe, wherein the cutterhead mechanism is detachably mounted on the bottom of the grouting mechanism;

[0009] The grouting mechanism includes a main support pipe and a grouting pipe. The bottom of the main support pipe is provided with a closed grouting chamber, and the side wall of the grouting chamber is provided with a grouting port.

[0010] The grouting pipe is arranged in the main support pipe, and the top of the grouting pipe extends out of the main support pipe, and the bottom of the grouting pipe extends into the grouting chamber;

[0011] A baffle is fixed to the side wall of the main support pipe, and the baffle is located above the spraying port.

[0012] The present invention cuts the well pipe mouth through the cutter head mechanism, and limits the vertical diffusion of the grouting pressure through the grouting chamber, thereby increasing the horizontal diffusion of the grouting pressure, so that the cement slurry is injected into the inner and outer filler layers of the pumping well through the grouting port, effectively filling and hardening the filler layer with cement slurry, effectively avoiding the subsequent diffusion of groundwater pollution caused by the unsealed filler layer in the abandoned well through the filler layer, and reducing the risk of cross-layer pollution in the abandoned pumping well.

[0013] Further preferably, the cutter disc mechanism includes a drive motor, a left cutter disc, a right cutter disc, a cutter disc connector and a tension spring;

[0014] The drive motor drives the cutter disc connector to rotate. Both ends of the cutter disc connector are hinged to the left cutter disc and the right cutter disc respectively, and the left cutter disc and the right cutter disc are connected via the tension spring.

[0015] Under the action of the rotating centrifugal force of the driving motor, the cutting diameter can be expanded to a degree sufficient to cut the pipe, and the pipe can be cut from the inside.

[0016] Further preferably, the left cutter disc and the right cutter disc are centrally symmetrically arranged;

[0017] When the left cutter disc and the right cutter disc are assembled, a through hole is formed for accommodating the tension spring;

[0018] One end of the tension spring is connected to the inner side of the left cutter disc, and the other end of the tension spring is connected to the inner side of the right cutter disc.

[0019] Compact shape for easy installation.

[0020] Further preferably, outer sides of the left cutter disc and the right cutter disc are provided with circumferentially arranged blades.

[0021] Further preferably, the cutter disc connector is located above the left cutter disc and the right cutter disc, and the center of the cutter disc connector is connected to the rotating shaft of the drive motor.

[0022] Further preferably, a wire threading tube is provided in the main support tube, and the lead wire of the drive motor is led out through the wire threading tube.

[0023] Further preferably, the baffle includes a fixing plate and a rubber sheath layer, the fixing plate is fixedly connected to the outer wall of the main support tube, and the rubber sheath layer is detachably mounted on the periphery of the fixing plate.

[0024] The rubber sheath layer is used to facilitate the upper limit of grouting. In order to prevent the cement slurry from overflowing from the well pipe during the grouting process.

[0025] Further preferably, there are at least two baffles, and the at least two baffles are sequentially arranged on the main support tube from top to bottom.

[0026] The entire device can be easily slid longitudinally into the waste well by using multiple baffles.

[0027] Further preferably, the main support tube is a quadrangular prism tube sealed at the top and bottom.

[0028] Further preferably, a partition is fixed in the main support tube, and the inner cavity of the main support tube is divided into an upper cavity and the grouting chamber by the partition;

[0029] The bottom of the grouting pipe extends into the partition.

[0030] Further preferably, the size of the grouting chamber is 120mm*120mm*120mm.

[0031] The beneficial effects of the present invention are as follows: after being lowered to the bottom of an abandoned pumping well, the cutter head mechanism can be used to cut the opening position of the well pipe, so that cement slurry can be injected into the internal and external filler layers of the pumping well through the grouting mechanism, effectively filling and hardening the filler layer with cement slurry, effectively avoiding the subsequent spread of groundwater pollution caused by the unsealed filler layer in the abandoned well through the filler layer, and reducing the risk of cross-layer pollution in the abandoned pumping well. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a structural diagram of a specific embodiment 1 of the present invention;

[0033] Figure 2 This is a structural schematic diagram of a cutter head mechanism according to a specific embodiment 1 of the present invention;

[0034] Figure 3 This is a schematic diagram of the partial structure of specific embodiment 1 of the present invention.

[0035] In the figure: 1 is the main support pipe, 2 is the grouting pipe, 3 is the threading pipe, 4 is the partition, 5 is the spraying port, 7 is the drive motor, 8 is the right cutterhead, 9 is the left cutterhead, 10 is the cutterhead connector, 11 is the tension spring, 13 is the grouting chamber, and 14 is the fixing plate. DETAILED DESCRIPTION

[0036] The present invention will be further described below with reference to the accompanying drawings.

[0037] See also Figures 1 to 3 Specific embodiment 1, a grouting and sealing device for an abandoned pumping well, including a grouting mechanism and a cutter head mechanism for cutting the well pipe, the cutter head mechanism being detachably mounted at the bottom of the grouting mechanism; the grouting mechanism includes a main support pipe 1 and a grouting pipe 2, the bottom of the main support pipe 1 is provided with a closed grouting chamber 13, and the side wall of the grouting chamber 13 is provided with a grouting port 5; the grouting pipe 2 is arranged in the main support pipe 1, and the top of the grouting pipe 2 extends out of the main support pipe 1, and the bottom of the grouting pipe 2 extends into the grouting chamber 13; a baffle is fixed to the side wall of the main support pipe 1, and the baffle is located above the grouting port 5. The present invention cuts the well pipe mouth through the cutter head mechanism, and limits the vertical diffusion of the grouting pressure through the grouting chamber 13, thereby increasing the horizontal diffusion of the grouting pressure, so that the cement slurry is injected into the inner and outer filler layers of the pumping well through the grouting port 5, effectively filling and hardening the filler layer with cement slurry, effectively avoiding the subsequent diffusion of groundwater pollution caused by the unsealed filler layer in the abandoned well through the filler layer, and reducing the risk of cross-layer pollution in the abandoned pumping well.

[0038] The cutterhead mechanism includes a drive motor 7, a left cutterhead 9, a right cutterhead 8, a cutterhead connector 10, and a tension spring 11. The drive motor 7 drives the cutterhead connector 10 to rotate. The two ends of the cutterhead connector 10 are hinged to the left cutterhead 9 and the right cutterhead 8, respectively. The left cutterhead 9 and the right cutterhead 8 are connected by a tension spring 11. Under the centrifugal force of the drive motor 7, the cutting diameter can be expanded to a sufficient degree to cut the pipe, and the pipe can be cut from the inside. The left cutterhead 9 and the right cutterhead 8 are arranged symmetrically. When the left cutterhead 9 and the right cutterhead 8 are assembled, they form a through hole for accommodating the tension spring 11. One end of the tension spring 11 is connected to the inside of the left cutterhead 9, and the other end of the tension spring 11 is connected to the inside of the right cutterhead 8. This facilitates the compactness of the device. The outer sides of the left cutterhead 9 and the right cutterhead 8 are provided with circumferentially arranged blades. The cutterhead connector 10 is located above the left cutterhead 9 and the right cutterhead 8, and the center of the cutterhead connector 10 is connected to the rotating shaft of the drive motor 7. A threading tube 3 is provided in the main support tube 1, and the lead wires of the drive motor 7 are led out through the threading tube 3. The upper and lower ends of the threading tube pass through the top and bottom of the main support tube. In the initial state, the drive motor 7 is not started, the left cutterhead 9 and the right cutterhead 8 form a circular cutterhead, and the outer diameter of the circular cutterhead is smaller than the outer diameter of the baffle. The top of the drive motor is detachably connected to the bottom of the main support tube. A boss extending outward is provided on the outer side of the top of the drive motor, and a mounting hole is provided on the boss. The drive motor is connected to the main support tube by a bolt passing through the mounting hole. Alternatively, a limiting protrusion is provided at the bottom of the main support tube, and a pressure plate is provided on the main support tube, and the pressure plate and the boss are assembled to clamp the limiting protrusion. The pressure plate and the boss are detachably connected by bolts passing through the mounting hole.

[0039] When the cutterhead mechanism is working, it extends into the specified position in the well pipe, and the external controller controls the drive motor 7 to rotate, driving the cutterhead connector 10 to rotate, and the left cutterhead 9 and the right cutterhead 8 are also rotated through the cutterhead connector 10. Under the action of centrifugal force, the left cutterhead 9 and the right cutterhead 8 overcome the spring force applied by the tension spring 11 and open until the blade contacts the inner wall of the pipe well. Due to the centrifugal force and the rotational torque of the drive motor 7, the left cutterhead 9 and the right cutterhead 8 will cut the pipe from the inside, and the drive motor 7 stops after the aperture of the pipe well sieve is expanded. The left cutterhead 9 and the right cutterhead 8 return to their initial state under the tension of the tension spring 11.

[0040] The baffle is a piston plate. The baffle may include a fixed plate 14 and a rubber sheath layer. The fixed plate 14 is fixedly connected to the outer wall of the main support tube 1, and the rubber sheath layer is detachably mounted on the periphery of the fixed plate 14. The rubber sheath layer facilitates the upper limit of grouting. In order to prevent the cement slurry from overflowing from the well pipe during the grouting process. A mounting hole is provided on the fixed plate. The rubber sheath layer can be detachably connected by screws passing through the mounting hole. There are at least two baffles, and at least two baffles are arranged on the main support tube 1 in sequence from top to bottom. Multiple baffles facilitate the entire device to slide longitudinally into the abandoned well.

[0041] The main support tube 1 is a quadrangular prism tube with sealed ends at both ends. A partition 4 is fixed inside the main support tube 1, which divides the inner cavity of the main support tube 1 into an upper cavity and a grouting chamber 13 arranged above and below. The bottom of the grouting pipe 2 extends into the partition 4.

[0042] The size of the grouting chamber 13 is 120 mm*120 mm*120 mm.

[0043] Directions:

[0044] Step 1: The cutterhead mechanism is connected to the grouting mechanism and extends into the corresponding position of the well pipe. The drive motor 7 is turned on and the cutterhead mechanism works to cut the well pipe.

[0045] Step 2: Disassemble the cutter head mechanism and the grouting mechanism, and extend the grouting mechanism into the well pipe.

[0046] Step three: inject cement slurry into the grouting pipe 2, fill the well pipe cut by the cutter head mechanism with cement slurry and seal it, and the filling layer outside the cut well pipe is also sealed with cement slurry.

[0047] The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A grouting and sealing device for an abandoned pumping well, comprising a grouting mechanism, characterized in that: It also includes a cutterhead mechanism for cutting the well pipe, and the cutterhead mechanism is detachably mounted on the bottom of the grouting mechanism; The grouting mechanism includes a main support pipe and a grouting pipe. The bottom of the main support pipe is provided with a closed grouting chamber, and the side wall of the grouting chamber is provided with a grouting port. The grouting pipe is arranged in the main support pipe, and the top of the grouting pipe extends out of the main support pipe, and the bottom of the grouting pipe extends into the grouting chamber; A baffle is fixed to the side wall of the main support pipe, and the baffle is located above the spraying port; The cutter disc mechanism includes a drive motor, a left cutter disc, a right cutter disc, a cutter disc connector and a tension spring; The drive motor drives the cutter disc connector to rotate, and both ends of the cutter disc connector are hinged to the left cutter disc and the right cutter disc respectively, and the left cutter disc and the right cutter disc are connected via the tension spring; The left cutter disc and the right cutter disc are centrally symmetrically arranged; When the left cutter disc and the right cutter disc are assembled, a through hole is formed for accommodating the tension spring; One end of the tension spring is connected to the inner side of the left cutter disc, and the other end of the tension spring is connected to the inner side of the right cutter disc; The outer sides of the left cutter disc and the right cutter disc are provided with circumferentially arranged cutting blades.

2. The abandoned pumping well grouting and sealing device according to claim 1, characterized in that: The cutter disc connector is located above the left cutter disc and the right cutter disc, and the center of the cutter disc connector is connected to the rotating shaft of the drive motor.

3. The abandoned pumping well grouting and sealing device according to claim 1, characterized in that: A wire threading tube is provided in the main support tube, and the lead wire of the drive motor is led out through the wire threading tube.

4. The grouting and sealing device for an abandoned pumping well according to claim 1, characterized in that: The blocking piece includes a fixing plate and a rubber sheath layer. The fixing plate is fixedly connected to the outer wall of the main support tube, and the rubber sheath layer is detachably mounted on the periphery of the fixing plate.

5. The grouting and sealing device for an abandoned pumping well according to claim 1, characterized in that: There are at least two baffles, and the at least two baffles are sequentially arranged on the main support tube from top to bottom.

6. The abandoned pumping well grouting and sealing device according to claim 1, characterized in that: The main support tube is a quadrangular prism tube with sealed ends at the top and bottom.

7. The abandoned pumping well grouting and sealing device according to claim 6, characterized in that: A partition is fixed in the main support tube, and the inner cavity of the main support tube is divided into an upper cavity and the grouting chamber by the partition; The bottom of the grouting pipe extends into the partition.

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