A sand pumping device and method for deep hole bottom sand pumping

Abstract

This invention relates to a sand dredging device and method for deep hole bottom sand dredging. It includes a drill rod connected to the lower end of a rotary drilling rig, a central rotating shaft inside the drill rod, a gearbox connected to the lower end of the central rotating shaft, and a sand dredging device connected to the lower end of the drill rod. The sand dredging device rotates with the central rotating shaft, and a drive device is also connected to the lower end of the central rotating shaft to drive the sand dredging device. An oil pipe providing power to the drive device is also installed inside the drill rod. A sand discharge pipe is connected to the upper end of the sand dredging device. The drive device drives the sand dredging device to rotate, drawing sand into the sand discharge pipe for discharge. The rotation of the central rotating shaft drives the sand-shoveling device to rotate, and its bottom sand-shoveling arm quickly breaks up the sand deposited at the bottom of the water. The sand then enters the sand-shoveling device through the sand-shoveling inlet, and a hydraulic pump drives the sand-dredging impeller to rotate at high speed, drawing the sand into the sand discharge pipe for discharge. A sand-breaking screen is installed at the sand-shoveling inlet to facilitate the breaking of sand blocks, and a baffle plate is installed at the sand-shoveling inlet to improve the sand intake efficiency, facilitating continuous sand dredging operations and reducing the number of dredging steps.

Description

Technical Field

[0001] This invention relates to the field of sand dredging equipment, and more particularly to a sand dredging device and method for realizing deep hole bottom sand dredging. Background Technology

[0002] During sand dredging operations, silt often settles at the bottom of the water, easily forming compacted sediment. Typically, the sediment needs to be broken up by flushing before being pumped out. When dredging over large areas, this process needs to be repeated frequently, which is time-consuming, labor-intensive, and inefficient. Existing sand dredging equipment often uses electric motors, but because water is present in sand-dredging environments, the motors can only be placed on the ground for pumping and cannot penetrate deep underground for deep dredging, resulting in low efficiency.

[0003] Chinese Patent Publication No. CN217399763U discloses a rapid sand dredging device for steel cofferdams, comprising an air compressor, an air inlet pipe, a connecting steel pipe, a sand dredging steel pipe, and a sand discharge hose. The bottom of the sand dredging steel pipe is placed within the mud and sand layer of the steel cofferdam, and its middle or top is detachably and fixedly connected to the steel cofferdam or a crane. An air inlet is provided at the lower part of the sand dredging steel pipe. The lower end of the connecting steel pipe is fixedly installed in the air inlet. One end of the air inlet pipe is connected to the air compressor, and the other end is fixedly connected to the upper end of the connecting steel pipe. The top of the sand dredging steel pipe is fixedly connected to the sand discharge hose for discharging mud and sand. An air filter is installed inside the connecting steel pipe. A debris filter is installed at the top of the sand dredging steel pipe. This application uses an air compressor as the power source for the sand dredging device, which is relatively low-cost, has a fast sand discharge speed, can effectively prevent debris from clogging the sand dredging device, saves resources and costs, shortens the construction period, improves engineering construction efficiency, and reduces construction costs. This patented method uses an air compressor to pump sand, but it can only pump sand to a relatively low depth. It cannot pump sand from deeper depths, thus limiting its application. Summary of the Invention

[0004] The technical problem this invention aims to solve is that existing sand dredging devices, when performing large-area sand dredging, use motors to pump sand from the ground, which cannot extract sand from deeper depths, resulting in low dredging efficiency. To address the above-mentioned shortcomings of the prior art, this invention provides a sand dredging device and method for achieving deep-hole bottom sand dredging.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0006] A sand-dredging device for deep hole bottom sand dredging is constructed, comprising a drill rod connected to the lower end of a rotary drilling rig, a central rotating shaft installed inside the drill rod, a gearbox connected to the lower end of the central rotating shaft, a sand-dredging device connected to the lower end of the drill rod, the sand-dredging device rotating with the central rotating shaft, a drive device for driving the sand-dredging device to perform sand dredging connected to the lower end of the central rotating shaft, an oil pipe for providing power to the drive device installed inside the drill rod, and a sand discharge pipe connected to the upper end of the sand-dredging device. The drive device drives the sand-dredging device to rotate and pump mud and sand into the sand discharge pipe for discharge.

[0007] Preferably, the lower end of the sand pumping device is connected to a sand shovel device. The sand shovel device rotates with the central shaft through a gearbox. The sand shovel device loosens the mud and sand and then enters the sand shovel device. The lower end of the sand pumping device extends into the sand shovel device to pump out the mud and sand inside the sand shovel device.

[0008] Preferably, the lower end of the sand-shoveling device is equipped with multiple sand-shoveling arms, each with a sand-shoveling opening, through which mud and sand enter the sand-shoveling device.

[0009] Preferably, the sand shovel opening is inclined, and a stop surface is provided on the side near the outer wall of the sand shovel device. The stop surface facilitates the entry of mud and sand into the sand shovel device through the sand shovel opening.

[0010] Preferably, a sand-breaking end is provided at the lower end of the sand shovel opening. The sand-breaking end is inclined downwards, and the lower end of the sand shovel opening is a slope, so that the sand-breaking end can facilitate the sinking of the sand pumping device.

[0011] Preferably, a sand-breaking net is also installed at the sand-shoveling opening. The sand-breaking net breaks up the sand and soil before it enters the sand-shoveling device through the sand-shoveling opening.

[0012] Preferably, the driving device is a hydraulic pump, which is located at the lower end of the central rotating shaft. The hydraulic pump drives the sand pumping device to rotate, creating a negative pressure inside the sand shoveling device. The negative pressure draws the mud and sand into the sand discharge pipe and discharges it. The oil supply pipe is a hydraulic oil pipe, which provides driving power to the hydraulic pump.

[0013] Preferably, the lower end of the sand pumping device is equipped with multiple sets of impellers. The hydraulic pump drives the impellers to rotate, creating a negative pressure zone at the lower end of the sand pumping device to pump the mud and sand into the discharge pipe and then discharge it.

[0014] Preferably, the sand inlet of the sand outlet pipe is connected to the upper end of the sand pumping device. After the mud and sand enter the sand pumping device, they enter the sand outlet pipe through the sand inlet. The other end of the sand outlet pipe is set on the ground to discharge the mud and sand.

[0015] A sand dredging method based on the above-mentioned sand dredging equipment for deep hole bottom dredging includes the following steps:

[0016] S1: The rotation of the central shaft drives the gearbox and drill pipe to rotate;

[0017] S2: The gearbox drives the sand-shoveling device to rotate and loosen the mud and sand;

[0018] S3: The silt enters the sand-shoveling device through the sand inlet, and the sand-shoveling nozzle rotates to loosen the sand.

[0019] S4: After being broken by the sand-breaking net, the sand blocks enter the sand-shoveling device through the sand-shoveling opening;

[0020] S5: The hydraulic pump drives the sand-dredging device to rotate, creating negative pressure in the sand-shoveling device to pump sand.

[0021] S6: The silt is discharged through the sand outlet pipe;

[0022] S7: After the sand-breaking end and the inclined plane rotate to loosen the sand at the bottom, the equipment sinks to begin the next stage of sand dredging.

[0023] The beneficial effects of this invention are as follows: the rotation of the central shaft drives the sand-shoveling device to rotate, and the sand-shoveling arm at the bottom quickly breaks up the sand deposited on the bottom of the water. The sand then enters the sand-shoveling device through the sand-shoveling inlet. The hydraulic pump drives the sand-draining impeller to rotate at high speed, drawing the sand into the sand discharge pipe and discharging it. The hydraulic pump can operate after sinking with the sand-draining device, which improves the working efficiency of the hydraulic pump. The sand-breaking net at the sand-shoveling inlet facilitates the crushing of sand blocks, and the baffle plate at the sand-shoveling inlet improves the sand intake efficiency, facilitating continuous sand-draining operations, reducing the number of sand-draining steps, and the sand-breaking end also facilitates deeper sand-draining operations by the sand-shoveling device. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort:

[0025] Figure 1 This is a schematic diagram of the sand-shoveling device according to a preferred embodiment of the present invention (sand outlet pipe omitted);

[0026] Figure 2 This is a cross-sectional structural diagram of the sand-shoveling device according to a preferred embodiment of the present invention;

[0027] Figure 3 This is an exploded view of the layout of the sand-shoveling device according to a preferred embodiment of the present invention;

[0028] Figure 4 This is a flowchart of a preferred embodiment of the sand-shoveling method of the present invention. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, a clear and complete description will be provided below in conjunction with the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the protection scope of the present invention.

[0030] A preferred embodiment of the present invention provides a sand-dredging device for deep-hole bottom sand dredging; such as... Figure 1-3 As shown, the system includes a drill pipe 2, inside which is a central rotating shaft 42. The drill pipe rotates with the central rotating shaft 2. A gearbox and a hydraulic pump 1 are connected to the lower end of the central rotating shaft 2. An oil pipe 43 is installed inside the drill pipe to inject hydraulic oil into the hydraulic pump. A sand-dredging device 4 is connected to the lower end of the drill pipe, and a sand-discharge pipe 5 is connected to the upper end of the sand-dredging device. The sand-dredging device 4 is driven to rotate by the hydraulic pump to perform sand-dredging operations, and the extracted mud and sand are then discharged through the sand-discharge pipe 5. Since sand-dredging operations are often carried out in humid environments, the hydraulic pump and gearbox are sealed inside the drill pipe, and hydraulic oil is injected into the hydraulic pump through the oil pipe. Sand-dredging operations are performed by the hydraulic pump, avoiding the traditional method of using an electric motor for sand-dredging. In traditional electric sand-dredging, the motor cannot enter the ground with the sand-dredging device to operate, and deep sand-dredging is also not possible.

[0031] Specifically, such as Figure 1-3 As shown, in order to facilitate the loosening of underground mud and sand for sand pumping, the lower end of the sand pumping device 4 is connected to a sand shoveling device 3. The sand shoveling device rotates with the drill rod to loosen the sand at the bottom, which facilitates the sand pumping operation. Since the sand pumping device is relatively large, when the sand at the bottom is loosened, the weight of the drill rod itself causes the sand shoveling device to move down. As it moves down, the sand shoveling device rotates to loosen the mud and sand in this layer and then pumps it into the sand outlet through the sand pumping device for discharge.

[0032] Furthermore, such as Figure 1-3 As shown, to facilitate the loosening of underground silt and sand, the sand-shoveling device is equipped with multiple sand-shoveling arms 31 at its lower end. Each sand-shoveling arm has a sand-shoveling opening 32. After the silt and sand are loosened by the sand-shoveling arms, they enter the sand-shoveling device through the sand-shoveling opening. Under the action of the sand-pumping device, the silt and sand inside the sand-shoveling device are pumped into the discharge pipe and discharged. Multiple sand-shoveling arms are evenly distributed at the bottom of the sand-shoveling device, increasing the sand-shoveling efficiency. The sand-shoveling opening is angled to facilitate the entry of silt and sand. A stop is provided on the outer wall of the sand-shoveling opening, allowing more silt and sand to enter the sand-shoveling device through the opening when it rotates, further improving the sand-shoveling efficiency.

[0033] Furthermore, such as Figure 3 As shown, the sand-shoveling arm is also inclined and has a sand-breaking end 311 at the end to facilitate the sinking of the sand-shoveling device. The bottom surface of the sand-shoveling arm is designed with a slope 310, which also facilitates the downward sliding of the sand-breaking end when rotating, further improving the sand-breaking effect of the sand-shoveling arm.

[0034] Furthermore, such as Figure 3 As shown, a sand-breaking net 33 is installed at the sand inlet 32, and a corresponding sand-breaking net 33 is also installed at the bottom of the sand-shoveling device. Some of the mud and sand at the bottom of the hole are mixed with soil, resulting in sand blocks. Their large volume affects the sand pumping effect. When the sand-breaking net rotates, it breaks the sand blocks so that they can pass through the sand-breaking net and enter the sand-shoveling device, which facilitates the operation of the sand pumping device and prevents the sand blocks from blocking the sand pumping port after entering the sand pumping device.

[0035] Furthermore, such as Figure 1-3 As shown, the sand-dredging device 4 uses an impeller to dredge sand. The impeller is inserted deep into the sand-shoveling device. Driven by the gearbox and hydraulic pump 1, the sand-dredging device rotates at high speed, creating negative pressure within the sand-shoveling device to draw sand into the sand inlet 51 and then discharge it through the sand outlet 50. The sand inlet is connected to the upper end of the sand-dredging device. The connector 7 is provided with a shaft fixing hole 71 for fixing the central rotating shaft and a hydraulic pipe fixing hole 70 for fixing the hydraulic pipe, preventing the central rotating shaft and hydraulic pipe from shaking and improving the stability during operation.

[0036] In operation, connector 7 drives the central shaft 42 to rotate, which in turn drives the drill rod 2 to rotate. Simultaneously, the gearbox drives the sand-dredging device 4 and the sand-shoveling device 3 to rotate. Sand enters the sand-shoveling device through the sand-shoveling inlet 32 ​​on the sand-shoveling arm 31. A hydraulic pump drives the impeller 41 to rotate at high speed, creating negative pressure within the sand-shoveling device. This forces the sand entering the device through the sand inlet 50 into the sand outlet pipe, and then out through the sand outlet 50. While the sand-shoveling device rotates, the sand mixed with soil is broken up by the sand-breaking net 33 before entering the sand-shoveling device, improving sand-shoveling efficiency. Furthermore, the sand-breaking end 311 loosens the sand at the bottom during rotation, allowing the sand-shoveling device to enter and perform sand-shoveling operations. The inclined surface 310 also facilitates the downward movement of the sand-shoveling equipment under its own weight. A stop surface is provided on the outside of the sand-shoveling arm 31 to allow more sand to enter the sand-shoveling inlet, further improving sand-shoveling efficiency.

[0037] A method for sand dredging at the bottom of deep holes, such as... Figure 4 As shown, the rotation of the central shaft of the drill rod drives the sand-dredging and sand-shoveling devices to rotate. Sand and mud enter the sand-shoveling device through the sand-shoveling arm and sand-shoveling opening. The hydraulic pump drives the impeller inside the sand-shoveling device to rotate at high speed, sucking the sand and mud into the sand outlet pipe for discharge, thus performing the sand-dredging operation. The sand-shoveling mesh at the sand-shoveling opening breaks up sand lumps, facilitating the extraction of sand mixed with soil. The sand-breaking end and inclined surface of the sand-shoveling arm facilitate the downward movement of the sand-shoveling equipment, loosening the sand and mud at the bottom before it enters the sand-shoveling opening, until the set sand-dredging depth is reached.

[0038] It should be understood that the present invention has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. Furthermore, under the teachings of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of the present invention.

Claims

1. A sand-dredging device for deep hole bottom sand dredging, comprising a drill rod connected to the lower end of a rotary drilling rig, a central rotating shaft disposed inside the drill rod, a gearbox connected to the lower end of the central rotating shaft, and a sand-dredging device connected to the lower end of the drill rod, the sand-dredging device rotating with the central rotating shaft, characterized in that: The lower end of the central rotating shaft is also connected to a drive device for driving the sand pumping device. The drill rod is also equipped with an oil supply pipe that provides power to the drive device. The upper end of the sand pumping device is connected to a sand discharge pipe. The drive device drives the sand pumping device to rotate and pump the mud and sand into the sand discharge pipe for discharge. The lower end of the sand pumping device is connected to a sand shoveling device. The sand shoveling device rotates with the central rotating shaft through a gearbox. The sand shoveling device loosens the mud and sand and allows it to enter the sand shoveling device. The lower end of the sand pumping device extends into the sand shoveling device to pump the mud and sand out of the sand shoveling device. The lower end of the sand shoveling device is equipped with multiple sand shoveling arms. Each sand shoveling arm is equipped with a sand shoveling opening. The mud and sand enter the sand shoveling device through the sand shoveling opening. A sand breaking net is also provided at the sand shoveling opening. The sand breaking net breaks the sand and soil and allows it to enter the sand shoveling device through the sand shoveling opening. The sand shoveling opening is inclined and has a stop surface on the side near the outer wall of the sand shoveling device. The stop surface facilitates the entry of mud and sand into the sand shoveling device through the sand shoveling opening.

2. The sand dredging equipment for deep hole bottom dredging according to claim 1, characterized in that: The lower end of the sand shovel opening is provided with a sand breaking end, which is inclined downwards and the lower end of the sand shovel opening is a slope, so that the sand breaking end can facilitate the sinking of the sand pumping device.

3. The sand dredging equipment for deep hole bottom dredging according to any one of claims 1-2, characterized in that: The driving device is a hydraulic pump, which is located at the lower end of the central rotating shaft. The hydraulic pump drives the sand pumping device to rotate, creating a negative pressure inside the sand shoveling device. The negative pressure draws the mud and sand into the sand discharge pipe and discharges it. The oil supply pipe is a hydraulic oil pipe, which provides driving power to the hydraulic pump.

4. The sand dredging equipment for deep hole bottom dredging according to claim 3, characterized in that: The lower end of the sand pumping device is equipped with multiple sets of impellers. The hydraulic pump drives the impellers to rotate, creating a negative pressure zone at the lower end of the sand pumping device to draw the mud and sand into the sand discharge pipe and then discharge it.

5. The sand dredging equipment for deep hole bottom dredging according to claim 3, characterized in that: The sand outlet of the sand discharge pipe is connected to the upper end of the sand pumping device. After the mud and sand enter the sand pumping device, they enter the sand discharge pipe through the sand inlet. The other end of the sand discharge pipe is set on the ground to discharge the mud and sand.

6. A sand-dredging method based on a sand-dredging device for deep-hole bottom-dredging according to any one of claims 1-5, characterized in that, Includes the following steps: S1: The rotation of the central shaft drives the gearbox and drill pipe to rotate; S2: The gearbox drives the sand-shoveling device to rotate, thus loosening the mud and sand; S3: The mud and sand enter the sand-shoveling device through the sand-shoveling opening, and at the same time the sand-shoveling opening rotates to loosen the sand; S4: After being broken by the sand-breaking net, the sand blocks enter the sand-shoveling device through the sand-shoveling opening; S5: The hydraulic pump drives the sand-dredging device to rotate, creating negative pressure in the sand-shoveling device to pump sand. S6: The silt is discharged through the sand outlet pipe; S7: After the sand-breaking end and the inclined plane rotate to loosen the sand at the bottom, the equipment sinks to begin the next stage of sand dredging.

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