A purification device and construction method for purifying drilling sediment using reverse circulation principle

Abstract

The present invention relates to the technical field of drilling sediment treatment, and in particular to a device for purifying drilling sediment using the reverse circulation principle, comprising a drilling rig, a hollow tube, a base and a connector, wherein the lower end face of the drilling rig is fixedly connected to the base, the inner side of the drilling rig is fixedly connected to the hollow tube, the lower end face of the hollow tube is fixedly connected to the sediment pipe, a limiting device is provided inside the base, a protective cylinder is provided below the base, the upper end face of the protective cylinder is fixedly connected to the connectors distributed left and right, the upper end face of the protective cylinder is rotatably connected to the limiting device, and a borehole is provided below the base; in the present invention, by means of the settling box, mud box, mud pipe and valve, the mud can be pre-precipitated, and the water is discharged from the box from the drainage hole to ensure the quality of the mud, and at the same time, the borehole pressure can be measured by a pressure tester, and then inflated by an air compressor to ensure the pressure inside the borehole and ensure that the borehole is not easy to collapse.

Description

Technical Field

[0001] The invention relates to the technical field of drilling sediment treatment, and in particular to a purification device and a construction method for purifying drilling sediment by utilizing the reverse circulation principle. Background Art

[0002] In recent years, bored cast-in-place piles have been widely used in foundation pit support and pile foundation construction due to their advantages such as convenient construction and low cost. During the construction of bored cast-in-place piles, clay mud or bentonite mud is generally used to protect the wall to prevent hole wall collapse. The crushed stone, gravel, etc. produced during drilling cannot be completely discharged out of the hole with the mud, and some of them will slowly settle to the bottom of the hole to form sediment. The sediment is an important factor affecting the bearing capacity of the pile foundation. If the cleaning does not meet the specifications, it will seriously affect the bearing capacity of the pile foundation.

[0003] The traditional method of cleaning sediment has the following disadvantages: 1. When the sedimented mud is recycled during construction, the mud is used before it is completely precipitated, resulting in insufficient viscosity of the mud itself and failure to effectively protect the wall; 2. There is no systematic drilling pressure testing device, resulting in excessive difference between the drilling pressure and the external pressure, which easily leads to the risk of drilling collapse; 3. The sealing above the borehole is not good, and gas is easy to leak, making it difficult to extract the mud. Therefore, in response to the above problems, a purification device and construction method for purifying drilling sediment using the reverse circulation principle are proposed. Summary of the invention

[0004] The object of the present invention is to provide a purification device and a construction method for purifying drilling sediment using the reverse circulation principle, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A purification device for purifying drilling sediment by utilizing the reverse circulation principle comprises a drilling rig, a hollow tube, a base and a connecting head, the lower end surface of the drilling rig is fixedly connected to the base, the inner side of the drilling rig is fixedly connected to the hollow tube, the lower end surface of the hollow tube is fixedly connected to the sediment pipe, a limiting device is provided inside the base, a protective cylinder is provided below the base, the upper end surface of the protective cylinder is fixedly connected to the connecting heads distributed left and right, the upper end surface of the protective cylinder is rotatably connected to the limiting device, a drilling hole is provided below the base, a sealing plate is fixedly connected to the lower end surface of the protective cylinder, a drill bit is fixedly connected to the lower end surface of the sediment pipe, a second mud pump is provided on the right side of the drilling rig, a feeding pipe is fixedly connected to the front end surface of the second mud pump, a storage device is provided on the right side of the second mud pump, a sedimentation device is fixedly connected to the right end surface of the storage device, a first mud pump is provided on the right side of the sedimentation device, a delivery pipe is fixedly connected to the upper end surface of the first mud pump, and the other end of the delivery pipe is fixedly connected to the drilling rig.

[0007] Preferably, an air compressor is provided on the left side of the drilling rig, and an air pipe is fixedly connected to the right end face of the air compressor, a one-way valve is fixedly connected to the outside of the air pipe, the other end of the air pipe is detachably connected to a connector, the output end of the first mud pump is fixedly connected to a sedimentation device, the input end of the second mud pump is fixedly connected to a storage device, the other end of the feed pipe is detachably connected to a connector, and a pressure tester is fixedly connected to the lower end face of the protective cylinder.

[0008] Preferably, the sedimentation device includes a sedimentation box, a mud box and a drainage hole, the mud box is fixedly connected to the inner side of the lower end surface of the sedimentation box, the left end surface of the mud box is connected to a mud pipe, the outer side of the mud pipe is fixedly connected to the sedimentation box, and the other end of the mud pipe is fixedly connected to a storage device.

[0009] Preferably, a drainage hole is provided on the rear end face of the sedimentation box, a first mud pump is fixedly connected to the right end face of the mud box, a valve is fixedly connected to the outer side of the mud pipe, and the upper end face of the mud box is vertically 30 cm away from the upper end face of the sedimentation box.

[0010] Preferably, the storage device includes a storage box, a stirring motor and a rotating shaft, the upper end surface of the storage box is fixedly connected to the stirring motor, the end of the main shaft of the stirring motor is fixedly connected to the rotating shaft, the outer side of the rotating shaft is fixedly connected to evenly distributed stirring rods, the left end surface of the storage box is fixedly connected to a second mud pump, and the right end surface of the storage box is connected to a sedimentation device.

[0011] Preferably, the lower end surface of the stirring rod is rotatably connected to the storage box, and the upper end surface of the storage box is circular.

[0012] Preferably, the limiting device includes a limiting motor, a threaded rod and a rotating cylinder. The outer side of the limiting motor is fixedly connected to the base, the end of the limiting motor main shaft is fixedly connected to the threaded rod, the outer side of the threaded rod is spirally connected to the rotating cylinder, the outer side of the rotating cylinder is slidably connected to the base, and the lower end face of the rotating cylinder is rotatably connected to the protective cylinder.

[0013] Preferably, the number of the limiting devices is 2, and the limiting devices are arranged symmetrically front and back with respect to the base.

[0014] Preferably, the steps are as follows:

[0015] 1. Make the sealing plate in close contact with the ground through the limit device, and drive the drill bit to work through the drilling rig;

[0016] 2. The first mud pump pumps the mud in the borehole into the sedimentation device for sedimentation;

[0017] 3. The precipitated mud is stored in a storage device for future use;

[0018] 4. The pressure tester measures the internal pressure of the borehole to determine whether an air compressor is needed to pressurize the borehole.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. In the present invention, the mud can be pre-precipitated by the provided sedimentation box, mud box, drainage hole, mud pipe and valve, and water will flow into the sedimentation box through the top of the mud box and be discharged from the box body through the drainage hole, thereby ensuring the quality of the mud;

[0021] 2. In the present invention, by providing a storage box, a stirring motor, a rotating shaft and a stirring rod, the stirring motor can stir the mud in the storage box through the stirring rod to prevent the mud from solidifying. By setting the valve, the mud can be quantitatively transported to the storage box to ensure the quality of the mud;

[0022] 3. In the present invention, by means of the air compressor, air pipe, one-way valve, rotating cylinder and limit motor, the sealing plate can be brought into close contact with the ground to prevent gas leakage. At the same time, the borehole pressure can be measured by a pressure tester, and then inflated by an air compressor to ensure the pressure inside the borehole and prevent the borehole from collapsing easily. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the structure of the precipitation device of the present invention;

[0025] Figure 3 It is a schematic diagram of the structure of the limiting device of the present invention;

[0026] Figure 4 It is a schematic diagram of the structure of the storage device of the present invention.

[0027] In the figure: 1-drilling rig, 2-hollow pipe, 3-base, 4-sedimentation device, 401-sedimentation box, 402-mud box, 403-drain hole, 404-mud pipe, 405-valve, 5-storage device, 501-storage box, 502-stirring motor, 503-rotating shaft, 504-stirring rod, 6-limiting device, 601-limiting motor, 602-threaded rod, 603-rotating cylinder, 7-connector, 8-protective cylinder, 9-sealing plate, 10-pressure tester, 11-sediment pipe, 12-drilling hole, 13-drill bit, 14-delivery pipe, 15-first mud pump, 16-second mud pump, 17-feeding pipe, 18-air compressor, 19-air pipe, 20-check valve. DETAILED DESCRIPTION

[0028] Embodiment 1:

[0029] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 , the present invention provides a technical solution:

[0030] A purification device for purifying drilling sediment using the reverse circulation principle comprises a drilling rig 1, a hollow tube 2, a base 3 and a connector 7, the lower end face of the drilling rig 1 is fixedly connected to the base 3, the inner side of the drilling rig 1 is fixedly connected to the hollow tube 2, the lower end face of the hollow tube 2 is fixedly connected to the sediment pipe 11, a limiting device 6 is arranged inside the base 3, the limiting device 6 comprises a limiting motor 601, a threaded rod 602 and a rotating cylinder 603, the outer side of the limiting motor 601 is fixedly connected to the base 3, the end of the main shaft of the limiting motor 601 is fixedly connected to the threaded rod 602, the outer side of the threaded rod 602 is spirally connected to the rotating cylinder 603, the outer side of the rotating cylinder 603 is slidably connected to the base 3, and the lower end face of the rotating cylinder 603 is rotatably connected to the protective cylinder 8. This arrangement ensures that the sealing plate 9 is in close contact with the ground to avoid To prevent the drilling hole 12 from collapsing, there are two limit devices 6, and the limit devices 6 are symmetrically arranged front and back about the base 3. A protective cylinder 8 is provided below the base 3. The upper end surface of the protective cylinder 8 is fixedly connected with a connecting head 7 distributed left and right. The upper end surface of the protective cylinder 8 is rotatably connected to the limit device 6. A drilling hole 12 is provided below the base 3. The lower end surface of the protective cylinder 8 is fixedly connected with a sealing plate 9. The lower end surface of the sediment pipe 11 is fixedly connected with a drill bit 13. A second mud pump 16 is provided on the right side of the drilling rig 1. The front end surface of the second mud pump 16 is fixedly connected with a feed pipe 17. A storage device 5 is provided on the right side of the second mud pump 16. The storage device 5 includes a storage box 501, a stirring motor 502 and a rotating shaft 503. The upper end surface of the storage box 501 is fixedly connected with a stirring motor 502. The stirring motor 502 is mainly connected to the slurry pump 17. A rotating shaft 503 is fixedly connected to the end of the shaft, and evenly distributed stirring rods 504 are fixedly connected to the outer side of the rotating shaft 503. The lower end surface of the stirring rod 504 is rotatably connected to the storage box 501. The upper end surface of the storage box 501 is circular. This arrangement ensures that the mud can be stirred normally and prevents the mud from solidifying. The left end surface of the storage box 501 is fixedly connected to the second mud pump 16, and the right end surface of the storage box 501 is connected to the sedimentation device 4. The right end surface of the storage device 5 is fixedly connected to the sedimentation device 4. The sedimentation device 4 includes a sedimentation box 401, a mud box 402 and a drainage hole 403. The inner side of the lower end surface of the sedimentation box 401 is fixedly connected to the mud box 402, and the left end surface of the mud box 402 is connected to the mud pipe 404. The outer side of the mud pipe 404 is fixedly connected to the sedimentation box 401. A drainage hole 403 is provided on the rear end face of 401, a first mud pump 15 is fixedly connected to the right end face of the mud box 402, a valve 405 is fixedly connected to the outer side of the mud pipe 404, and the upper end face of the mud box 402 is 30 cm vertically away from the upper end face of the sedimentation box 401. This arrangement prevents water from flowing out of the sedimentation box 401 and ensures that water can flow out through the drainage hole 403 for collection, thereby avoiding waste of resources and pollution of the environment. A storage device 5 is fixedly connected to the other end of the mud pipe 404, a first mud pump 15 is provided on the right side of the sedimentation device 4, a delivery pipe 14 is fixedly connected to the upper end face of the first mud pump 15, and the other end of the delivery pipe 14 is fixedly connected to the drilling rig 1, an air compressor 18 is provided on the left side of the drilling rig 1, and an air pipe 19 is fixedly connected to the right end face of the air compressor 18.A one-way valve 20 is fixedly connected to the outside of the gas delivery pipe 19, and the other end of the gas delivery pipe 19 is detachably connected to the connector 7. The output end of the first mud pump 15 is fixedly connected to the sedimentation device 4, and the input end of the second mud pump 16 is fixedly connected to the storage device 5. The other end of the feed pipe 17 is detachably connected to the connector 7, and the lower end surface of the protective tube 8 is fixedly connected to the pressure tester 10. This arrangement allows the borehole 12 to be inflated in time to prevent the borehole 12 from collapsing.

[0031] Here are the steps:

[0032] 1. The sealing plate 9 is brought into close contact with the ground through the limiting device 6, and the drill 1 drives the drill bit 13 to work;

[0033] 2. The first mud pump 15 pumps the mud in the borehole 12 into the sedimentation device 4 for sedimentation;

[0034] 3. The precipitated mud enters the storage device 5 for storage and is ready for use;

[0035] 4. The pressure tester 10 measures the internal pressure of the borehole 12 . The pressure of the borehole 12 is relatively low, and the borehole 12 is pressurized by the air compressor 18 .

[0036] The drilling rig 1 is of model HH138 drilling rig, the stirring motor 502 and the limit motor 601 are both of model YS motors, the pressure tester 10 is of model SUP-Y810 pressure tester, and the first mud pump 15 and the second mud pump 16 are both of model G20-1 mud pumps.

[0037] Working process: when in use, the power is turned on, and the threaded rod 602 is driven to rotate by the rotation of the limit motor 601, and the threaded rod 602 drives the rotating cylinder 603 to move downward, so that the rotating cylinder 603 squeezes the protective cylinder 8, and the protective cylinder 8 squeezes the sealing plate 9 downward, so that the lower end surface of the sealing plate 9 is in close contact with the ground to achieve a sealing effect, and the drill rig 1 drives the drill bit 13 to rotate to work on the soil layer, and mud is injected into the borehole 12. The soil layer and gravel are mixed with the mud by rotating the drill 13, and then the first mud pump 15 is started to pump the mud into the mud box 402 through the delivery pipe 14. The mud and water are mixed, and the water with a smaller density will flow from the top of the mud box 402 to the sedimentation box 401, thereby The mud is discharged from the drain hole 403, and then by opening the valve 405, the mud will enter the storage box 501, and then the stirring motor 502 drives the rotating shaft 503 to rotate, and the rotating shaft 503 drives the stirring rod 504 to rotate, so as to stir the mud, prevent the mud from solidifying, and ensure the quality of the mud. This setting ensures that the mud transportation will not be interrupted and the quality of the mud is guaranteed. When the pressure tester 10 measures that the pressure in the borehole 12 is relatively small, the air is supplied to the borehole 12 through the air pipe 19 through the air compressor 18, and the one-way valve 20 ensures that the air in the borehole 12 will not flow back, ensuring that the pressure of the borehole 12 is the same as the external pressure, so that the borehole 12 is not easy to collapse, which has good practical benefits.

[0038] Embodiment 2:

[0039] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 , the present invention provides a technical solution:

[0040] A purification device for purifying drilling sediment using the reverse circulation principle comprises a drilling rig 1, a hollow tube 2, a base 3 and a connector 7, the lower end face of the drilling rig 1 is fixedly connected to the base 3, the inner side of the drilling rig 1 is fixedly connected to the hollow tube 2, the lower end face of the hollow tube 2 is fixedly connected to the sediment pipe 11, a limiting device 6 is arranged inside the base 3, the limiting device 6 comprises a limiting motor 601, a threaded rod 602 and a rotating cylinder 603, the outer side of the limiting motor 601 is fixedly connected to the base 3, the end of the main shaft of the limiting motor 601 is fixedly connected to the threaded rod 602, the outer side of the threaded rod 602 is spirally connected to the rotating cylinder 603, the outer side of the rotating cylinder 603 is slidably connected to the base 3, and the lower end face of the rotating cylinder 603 is rotatably connected to the protective cylinder 8. This arrangement ensures that the sealing plate 9 is in close contact with the ground to avoid To prevent the drilling hole 12 from collapsing, there are two limit devices 6, and the limit devices 6 are symmetrically arranged front and back about the base 3. A protective cylinder 8 is provided below the base 3. The upper end surface of the protective cylinder 8 is fixedly connected with a connecting head 7 distributed left and right. The upper end surface of the protective cylinder 8 is rotatably connected to the limit device 6. A drilling hole 12 is provided below the base 3. The lower end surface of the protective cylinder 8 is fixedly connected with a sealing plate 9. The lower end surface of the sediment pipe 11 is fixedly connected with a drill bit 13. A second mud pump 16 is provided on the right side of the drilling rig 1. The front end surface of the second mud pump 16 is fixedly connected with a feed pipe 17. A storage device 5 is provided on the right side of the second mud pump 16. The storage device 5 includes a storage box 501, a stirring motor 502 and a rotating shaft 503. The upper end surface of the storage box 501 is fixedly connected with a stirring motor 502. The stirring motor 502 is mainly connected to the slurry pump 17. A rotating shaft 503 is fixedly connected to the end of the shaft, and evenly distributed stirring rods 504 are fixedly connected to the outer side of the rotating shaft 503. The lower end surface of the stirring rod 504 is rotatably connected to the storage box 501. The upper end surface of the storage box 501 is circular. This arrangement ensures that the mud can be stirred normally and prevents the mud from solidifying. The left end surface of the storage box 501 is fixedly connected to the second mud pump 16, and the right end surface of the storage box 501 is connected to the sedimentation device 4. The right end surface of the storage device 5 is fixedly connected to the sedimentation device 4. The sedimentation device 4 includes a sedimentation box 401, a mud box 402 and a drainage hole 403. The inner side of the lower end surface of the sedimentation box 401 is fixedly connected to the mud box 402, and the left end surface of the mud box 402 is connected to the mud pipe 404. The outer side of the mud pipe 404 is fixedly connected to the sedimentation box 401. A drainage hole 403 is provided on the rear end face of 401, a first mud pump 15 is fixedly connected to the right end face of the mud box 402, a valve 405 is fixedly connected to the outer side of the mud pipe 404, and the upper end face of the mud box 402 is 30 cm vertically away from the upper end face of the sedimentation box 401. This arrangement prevents water from flowing out of the sedimentation box 401 and ensures that water can flow out through the drainage hole 403 for collection, thereby avoiding waste of resources and pollution of the environment. A storage device 5 is fixedly connected to the other end of the mud pipe 404, a first mud pump 15 is provided on the right side of the sedimentation device 4, a delivery pipe 14 is fixedly connected to the upper end face of the first mud pump 15, and the other end of the delivery pipe 14 is fixedly connected to the drilling rig 1, an air compressor 18 is provided on the left side of the drilling rig 1, and an air pipe 19 is fixedly connected to the right end face of the air compressor 18.A one-way valve 20 is fixedly connected to the outside of the gas delivery pipe 19, and the other end of the gas delivery pipe 19 is detachably connected to the connector 7. The output end of the first mud pump 15 is fixedly connected to the sedimentation device 4, and the input end of the second mud pump 16 is fixedly connected to the storage device 5. The other end of the feed pipe 17 is detachably connected to the connector 7, and the lower end surface of the protective tube 8 is fixedly connected to the pressure tester 10. This arrangement allows the borehole 12 to be inflated in time to prevent the borehole 12 from collapsing.

[0041] Here are the steps:

[0042] 1. The sealing plate 9 is brought into close contact with the ground through the limiting device 6, and the drill 1 drives the drill bit 13 to work;

[0043] 2. The first mud pump 15 pumps the mud in the borehole 12 into the sedimentation device 4 for sedimentation;

[0044] 3. The precipitated mud enters the storage device 5 for storage and is ready for use;

[0045] 4. The pressure tester 10 measures the internal pressure of the borehole 12. When the pressure of the borehole 12 is stable, the air compressor 18 does not need to work.

[0046] The drilling rig 1 is of model HH138 drilling rig, the stirring motor 502 and the limit motor 601 are both of model YS motors, the pressure tester 10 is of model SUP-Y810 pressure tester, and the first mud pump 15 and the second mud pump 16 are both of model G20-1 mud pumps.

[0047] Working process: when in use, the power is turned on, and the threaded rod 602 is driven to rotate by the rotation of the limit motor 601, and the threaded rod 602 drives the rotating cylinder 603 to move downward, so that the rotating cylinder 603 squeezes the protective cylinder 8, and the protective cylinder 8 squeezes the sealing plate 9 downward, so that the lower end surface of the sealing plate 9 is in close contact with the ground to achieve a sealing effect, and the drill 1 drives the drill bit 13 to rotate to work on the soil layer, and mud is injected into the borehole 12. The soil layer and gravel are mixed with the mud by rotating the drill 13, and then the first mud pump 15 is started to pump the mud into the mud box 402 through the delivery pipe 14. The mud and water are mixed, and the water with a smaller density will flow from the top of the mud box 402 to the sedimentation box 401. , and thus discharged from the drain hole 403, and then by opening the valve 405, the mud will enter the storage box 501, and then the stirring motor 502 drives the rotating shaft 503 to rotate, and the rotating shaft 503 drives the stirring rod 504 to rotate, thereby stirring the mud to prevent the mud from solidifying and ensure the quality of the mud. This setting ensures that the mud transportation will not be interrupted and the quality of the mud is guaranteed. When the pressure tester 10 measures that the pressure in the borehole 12 is consistent with the external air pressure, the air compressor 18 stops working, and the one-way valve 20 ensures that the air in the borehole 12 will not flow back, ensuring that the pressure of the borehole 12 is the same as the external pressure, so that the borehole 12 is not easy to collapse, which has good practical benefits.

[0048] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. The above is only a preferred implementation of the present invention. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the protection scope of the present invention.

Claims

1. A purification device for purifying drilling sediment using the reverse circulation principle, comprising a drilling rig (1), a hollow tube (2), a base (3) and a connector (7), characterized in that: The lower end surface of the drilling rig (1) is fixedly connected to a base (3), the inner side of the drilling rig (1) is fixedly connected to a hollow tube (2), the lower end surface of the hollow tube (2) is fixedly connected to a sediment tube (11), a limiting device (6) is provided inside the base (3), a protective tube (8) is provided below the base (3), the upper end surface of the protective tube (8) is fixedly connected to a connecting head (7) distributed on the left and right, the upper end surface of the protective tube (8) is rotatably connected to the limiting device (6), a drilling hole (12) is provided below the base (3), and a sealing plate (9) is fixedly connected to the lower end surface of the protective tube (8). ), the lower end face of the sediment pipe (11) is fixedly connected to a drill bit (13), a second mud pump (16) is provided on the right side of the drilling rig (1), a front end face of the second mud pump (16) is fixedly connected to a feed pipe (17), a storage device (5) is provided on the right side of the second mud pump (16), a sedimentation device (4) is fixedly connected to the right end face of the storage device (5), a first mud pump (15) is provided on the right side of the sedimentation device (4), an upper end face of the first mud pump (15) is fixedly connected to a delivery pipe (14), and the other end of the delivery pipe (14) is fixedly connected to the drilling rig (1); The sedimentation device (4) comprises a sedimentation box (401), a mud box (402) and a drainage hole (403); the mud box (402) is fixedly connected to the inner side of the lower end surface of the sedimentation box (401); the left end surface of the mud box (402) is connected to a mud pipe (404); the outer side of the mud pipe (404) is fixedly connected to the sedimentation box (401); the other end of the mud pipe (404) is fixedly connected to a storage device (5); the rear end surface of the sedimentation box (401) is provided with a drainage hole (403); the right end surface of the mud box (402) is fixedly connected to a first mud pump (15); the outer side of the mud pipe (404) is fixedly connected to a valve (405); the upper end surface of the mud box (402) is 30 cm away from the upper end surface of the sedimentation box (401); The storage device (5) comprises a storage box (501), a stirring motor (502) and a rotating shaft (503); the upper end surface of the storage box (501) is fixedly connected to the stirring motor (502); the end of the main shaft of the stirring motor (502) is fixedly connected to the rotating shaft (503); the outer side of the rotating shaft (503) is fixedly connected to stirring rods (504) distributed evenly; the left end surface of the storage box (501) is fixedly connected to a second mud pump (16); the right end surface of the storage box (501) is connected to a sedimentation device (4); the lower end surface of the stirring rod (504) is rotatably connected to the storage box (501); and the upper end surface of the storage box (501) is arranged in a circular shape; The limiting device (6) comprises a limiting motor (601), a threaded rod (602) and a rotating cylinder (603); the outer side of the limiting motor (601) is fixedly connected to the base (3); the end of the main shaft of the limiting motor (601) is fixedly connected to the threaded rod (602); the outer side of the threaded rod (602) is spirally connected to the rotating cylinder (603); the outer side of the rotating cylinder (603) is slidably connected to the base (3); and the lower end surface of the rotating cylinder (603) is rotatably connected to the protective cylinder (8).

2. A purification device for purifying drilling sediment using the reverse circulation principle according to claim 1, characterized in that: An air compressor (18) is provided on the left side of the drilling rig (1), and an air pipe (19) is fixedly connected to the right end face of the air compressor (18), and a one-way valve (20) is fixedly connected to the outside of the air pipe (19). The other end of the air pipe (19) is detachably connected to a connector (7). The output end of the first mud pump (15) is fixedly connected to a sedimentation device (4), and the input end of the second mud pump (16) is fixedly connected to a storage device (5). The other end of the feed pipe (17) is detachably connected to the connector (7), and the lower end face of the protective tube (8) is fixedly connected to a pressure tester (10).

3. The purification device for purifying drilling sediment using the reverse circulation principle according to claim 1 is characterized in that: The number of the limiting devices (6) is two, and the limiting devices (6) are arranged symmetrically front and back with respect to the base (3).

4. The construction method of a purification device for purifying drilling sediment using the reverse circulation principle according to any one of claims 1 to 3, the steps are as follows: 1) The sealing plate (9) is brought into close contact with the ground through the limiting device (6), and the drill bit (13) is driven by the drilling machine (1) to work; 2) The first mud pump (15) pumps the mud in the borehole (12) into the sedimentation device (4) for sedimentation; 3) The precipitated mud enters the storage device (5) for storage and is ready for use; 4) The pressure tester (10) measures the internal pressure of the borehole (12) to determine whether the air compressor (18) is needed to pressurize the inside of the borehole (12).

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