Water jet-assisted sludge extraction and conveying system

Abstract

Water jet-assisted sludge extraction and conveying device, characterized in that it comprises: an extrusion pump body (1) for supplying the drive for conveying sludge from the tunnel, wherein the extrusion pump body (1) is provided with a first water inlet pipe (2) for sludge supply and a first water outlet pipe (3) for conveying sludge; a return and processing pipeline for assisting the extrusion pump body (1) in suctioning and conveying the sludge, wherein the return and processing pipeline comprises a filter element, an air bag pressurization element and a water jet flushing element, wherein the filter element is configured to separate sludge water from the sludge coming from the extrusion pump body (1) and convey the sludge water to the air bag pressurization element, the air bag pressurization element is configured to pressurize and dilute the sludge water to obtain high-pressure sludge water, and convey the high-pressure sludge water to the water jet flushing element, the water jet flushing element is configured to return the high-pressure sludge water to the sludge in the tunnel; a suction and conveying element for suctioning sludge and conveying sludge to the first water inlet pipe (2); a sand cleaning element which is connected to the air bag pressurization element and is designed to return the high-pressure sludge water in the air bag pressurization element to the first water inlet pipe (2) and thereby flush the first water inlet pipe (2) and the extrusion pump body (1).

Description

TECHNICAL AREA

[0001] The present invention relates to the technical field of sludge extraction and removal, in particular a water jet-assisted sludge extraction and removal device. STATE OF THE ART

[0002] During tunnel boring machine operations, unfavorable soil conditions often lead to water and mud surges. This causes large quantities of mud and sand to accumulate in the tunnel, resulting in the formation of silt. As the water evaporates, this silt solidifies into clumps, necessitating its timely removal from the tunnel. Currently, two methods exist for removing silt from tunnels: The first involves directly adding water while the silt is simultaneously stirred manually. The mixture of water and silt is then pumped out and removed. The second method relies on waiting for natural sedimentation and separation of the water and silt. The clear water on the surface is then pumped out, and the silt and sand are excavated manually. Both methods require significant manpower and are inefficient.

[0003] The first method consumes large quantities of water, resulting in a loss of water resources. Furthermore, the sedimentation of sludge and sand leads to deposits of sludge and sand in the suction and discharge pump, blockages in the pipelines, and damage to the equipment. CONTENT OF THE PRESENT INVENTION

[0004] The object of the present invention is to provide a water jet-assisted sludge extraction and conveying device in order to solve the problems mentioned in the prior art.

[0005] To solve the above-mentioned problem, the present invention provides the following technical solution: a water jet-assisted sludge suction and conveying device comprises an extrusion pump body for supplying the drive for conveying sludge from the tunnel, wherein the extrusion pump body is provided with a first water inlet pipe for sludge supply and a first water outlet pipe for conveying sludge; a return and processing pipeline for assisting the extrusion pump body in suctioning and conveying the sludge, wherein the return and processing pipeline comprises a filter element, an air bag pressurization element and a water jet flushing element, wherein the filter element is configured to separate sludge water from the sludge coming from the extrusion pump body and convey the sludge water to the air bag pressurization element, the air bag pressurization element is configured to pressurize and dilute the sludge water to obtain high-pressure sludge water, and convey the high-pressure sludge water to the water jet flushing element, the water jet flushing element is configured to return the high-pressure sludge water to the sludge in the tunnel; a suction and conveying element for suctioning sludge and conveying sludge to the first water inlet pipe; a sand cleaning element that is connected to the air bag pressurization element and is designed to return the high-pressure sludge water in the air bag pressurization element to the first water inlet pipe and thereby flush the first water inlet pipe and the extrusion pump body.

[0006] Furthermore, the filter element comprises a filter device, a second water inlet pipe and a second water outlet pipe, wherein the second water inlet pipe is connected to the inlet opening of the filter device, the second water inlet pipe is connected to the first water outlet pipe, and the second water outlet pipe is connected to the air bag pressurization element;

[0007] The first water drain pipe is provided with at least two outlet openings, one of which is connected to the second water inlet pipe, while the other outlet discharges some of the sludge from the extrusion pump body into the outside environment.

[0008] Furthermore, the air bag pressurization element is an air bag, wherein the air inlet of the air bag is connected to the second water drain pipe, the air bag is provided with a water filling opening and an air filling opening in order to pressurize the sludge water in the air bag by pressurizing it with air and to obtain high-pressure sludge water, and the air bag is further provided with a second water distribution opening.

[0009] Furthermore, the suction and conveying element comprises a support plate, a suction and conveying pipe, and a third water inlet pipe, wherein the suction and conveying pipe is provided on the support plate, the support plate providing buoyancy; The upper opening end of the suction and conveying pipe is connected to the first water inlet pipe via the third water inlet pipe; Several first through-holes are arranged evenly distributed in the side wall of the suction and conveying pipe, which are designed to direct the sludge near the suction and conveying pipe into the suction and conveying pipe.

[0010] Furthermore, the water jet flushing element comprises a third water drain pipe and several high-pressure flushing pipes; the several high-pressure flushing pipes are arranged at equal intervals on the support plate; the upper opening end of the high-pressure flushing pipe is connected to the second water distribution opening via the third water drain pipe; several second through-holes are arranged evenly spaced in the side wall of the high-pressure flushing pipe, designed to release high-pressure sludge water to the sludge near the high-pressure flushing pipe.

[0011] Furthermore, the lower opening end of the high-pressure flushing pipe is sealed to prevent the support plate and the suction and discharge pipe from moving upwards and becoming detached from the sludge due to the discharge of high-pressure sludge water.

[0012] Furthermore, the suction and conveying pipe is equipped with an opening and closing piece with which the lower opening end of the suction and conveying pipe can be opened or closed.

[0013] Furthermore, the opening and closing piece comprises a first disc and a second disc, which are stacked vertically, with several third through-holes arranged evenly distributed in each of the first and second discs, with a gap remaining between two adjacent third through-holes in each disc; the suction and discharge pipe is further equipped with an adjusting element for rotating and fixing the first disc; when the third through-holes of the first disc correspond one-to-one with the third through-holes of the second disc, the lower opening end of the suction and discharge pipe is in an open state; when the third through-holes of the first disc are offset one after the other with the third through-holes of the second disc, the lower opening end of the suction and discharge pipe is in a closed state.

[0014] Furthermore, the adjusting element comprises a connecting rod, an L-shaped block and a bolt, wherein the connecting rod rests on the first disk, the suction and discharge pipe is provided with a sliding hole; one end of the L-shaped block slides in the sliding hole and is connected to the connecting rod, while the other end of the L-shaped block rests against the outer wall of the suction and discharge pipe and is provided with a positioning hole, wherein the connecting rod is provided with a threaded hole, and the bolt is guided through the positioning hole and the corresponding first through-hole before being connected to the threaded hole.

[0015] Furthermore, the air bag is also provided with a first water distribution opening, wherein the sand cleaning element is a fourth water drain pipe, the first water distribution opening is connected to the first water inlet pipe via the fourth water drain pipe, so that high-pressure sludge water can flush the first water inlet pipe and the extrusion pump body.

[0016] In comparison to the prior art, the present invention has the following advantageous effects: The invention controls the recirculation of high-pressure sludge water to dilute and propel the sludge in the tunnel. The impact force drives the sludge into a vigorous flow, ensuring thorough mixing of the sludge with water. This prevents sludge clogging at the suction and discharge pipe, increases the efficiency of sludge suction and discharge, and reduces labor costs. Furthermore, it effectively avoids losses caused by production interruptions during tunnel construction due to sludge cleaning. Part of the impact force is directed towards the suction and discharge pipe. This allows the holes in the suction and discharge pipe to be flushed and cleaned to prevent clogging. Additionally, the first water inlet pipe and the extrusion pump body can be flushed to prevent clogging of the extrusion pump by sludge deposits.This enables continuous suction and removal of sludge without manual stirring and scooping, thus increasing the efficiency of sludge suction and removal. BRIEF DESCRIPTION OF THE DRAWING Fig. Figure 1 shows a perspective view of the present invention; Fig. Figure 2 shows a schematic representation of the high-pressure flushing pipes and the suction and discharge pipe of the present invention; Fig. Figure 3 shows a sectional view of the suction and discharge pipe of the present invention; Fig. Figure 4 shows an enlarged view of A in Fig. 3 of the present invention; Fig. Figure 5 shows a schematic representation of the L-shaped plate of the present Invention;

[0017] In the drawings: 1. Extrusion pump body; 2. First water inlet pipe; 3. First water outlet pipe; 4. Filter device; 5. Second water inlet pipe; 6. Second water outlet pipe; 7. Air bag; 8. Water filling port; 9. Air filling port; 10. First water splitting port; 11. Second water splitting port; 12. Fourth water outlet pipe; 13. Support plate; 14. Suction and discharge pipe; 15. Third water inlet pipe; 16. Third water outlet pipe; 17. High-pressure flushing pipe; 18. First through-hole; 19. First washer; 20. Second washer; 21. Third through-hole; 22. Connecting rod; 23. L-shaped block; 24. Bolt DETAILED DESCRIPTION

[0018] The technical solutions of the embodiments of the present invention are described clearly and completely below with reference to the drawings of those embodiments. It is obvious that the described embodiments represent only a part of the embodiments of the present invention and not the entirety of them. All other embodiments developed by those skilled in the art without any inventive work based on the embodiments of the present invention fall within the scope of protection of the present invention.

[0019] Referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4 to Fig. 5.

[0020] The present invention provides a water jet-assisted sludge suction and conveying device comprising: an extrusion pump body 1 for supplying the drive for conveying sludge from the tunnel, wherein the extrusion pump body 1 is provided with a first water inlet pipe 2 for sludge supply and a first water outlet pipe 3 for conveying sludge; a return and processing pipeline for assisting the extrusion pump body 1 in suctioning and conveying the sludge, wherein the return and processing pipeline comprises a filter element, an air bag pressurization element and a water jet flushing element, wherein the filter element is configured to separate sludge water from the sludge coming from the extrusion pump body 1 and convey the sludge water to the air bag pressurization element, the air bag pressurization element is configured to pressurize and dilute the sludge water to obtain high-pressure sludge water, and convey the high-pressure sludge water to the water jet flushing element, the water jet flushing element is configured to return the high-pressure sludge water to the sludge in the tunnel; a suction and conveying element for suctioning sludge and conveying sludge to the first water inlet pipe 2; A sand cleaning element, connected to the air bag pressurization element, is designed to return the high-pressure sludge water in the air bag pressurization element to the first water inlet pipe 2, thereby flushing the first water inlet pipe 2 and the extrusion pump body 1. The extrusion pump body 1 is driven by a frequency converter motor. The gear ratio for driving the extrusion pump is set via a planetary gearbox. The frequency converter motor allows for stepless speed control, while the planetary gearbox offers advantages such as low weight, small size, and a wide range of gear ratios. The extrusion pump body 1 has good self-priming capability, enabling continuous suction and discharge.

[0021] Furthermore, the filter element comprises a filter device 4, a second water inlet pipe 5 and a second water outlet pipe 6, wherein the second water inlet pipe 5 is connected to the inlet opening of the filter device 4, while the second water outlet pipe 6 is connected to the outlet opening of the filter device 4, the second water inlet pipe 5 is connected to the first water outlet pipe 3, and the second water outlet pipe 6 is connected to the air bag pressurization element;

[0022] The first water drain pipe 3 is provided with at least two outlet openings, one of which is connected to the second water inlet pipe 5, while the other outlet discharges some of the sludge from the extrusion pump body 1 into the outside environment.

[0023] Furthermore, the air bag pressurization element is an air bag 7, wherein the air inlet of the air bag 7 is connected to the second water outlet pipe 6, the air bag 7 is provided with a water filling opening 8 and an air filling opening 9, the water filling opening 8 and the air filling opening 9 are each connected to an external water supply device and an external air supply device in order to pressurize the sludge water in the air bag 7 by pressurizing it with air and to obtain high-pressure sludge water, the air bag 7 is furthermore provided with a second water distribution opening 11.

[0024] Furthermore, the suction and conveying element comprises a support plate 13, a suction and conveying pipe 14, and a third water inlet pipe 15, wherein the suction and conveying pipe 14 is provided on the support plate 13, the support plate 13 providing buoyancy; The upper opening end of the suction and conveying pipe 14 is connected to the first water inlet pipe 2 via the third water inlet pipe 15; Several first through-holes 18 are arranged evenly distributed in the side wall of the suction and conveying pipe 14, which are designed to direct the sludge near the suction and conveying pipe 14 into the suction and conveying pipe 14.

[0025] Furthermore, the water jet flushing element comprises a third water drain pipe 16 and several high-pressure flushing pipes 17; the several high-pressure flushing pipes 17 are arranged at equal intervals on the support plate 13 and uniformly surround the circumference of the suction and discharge pipe 14; the upper opening end of the high-pressure flushing pipe 17 is connected to the second water distribution opening 11 via the third water drain pipe 16; several second through-holes are arranged uniformly distributed in the side wall of the high-pressure flushing pipe 17, which are designed to release high-pressure sludge water to the sludge near the high-pressure flushing pipe 17.

[0026] Furthermore, the lower opening end of the high-pressure flushing pipe 17 is closed to prevent the support plate 13 and the suction and discharge pipe 14 from moving upwards and becoming detached from the sludge by the discharge of high-pressure sludge water.

[0027] Furthermore, the suction and conveying pipe 14 is provided with an opening and closing piece with which the lower opening end of the suction and conveying pipe 14 can be opened or closed. The opening and closing piece comprises a first disc 19 and a second disc 20, which are stacked vertically, wherein several third through-holes 21 are arranged evenly distributed in the first disc 19 and the second disc 20, with a gap remaining between two adjacent third through-holes 21 in each disc.The suction and discharge pipe 14 is further equipped with an adjusting element for rotating and fixing the first disc 19; when the third through holes 21 of the first disc 19 correspond one-to-one with the third through holes 21 of the second disc 20, the lower opening end of the suction and discharge pipe 14 is in an open state; when the third through holes 21 of the first disc 19 are offset one after the other with the third through holes 21 of the second disc 20, the lower opening end of the suction and discharge pipe 14 is in a closed state.

[0028] Furthermore, the adjusting element comprises a connecting rod 22, an L-shaped block 23 and a bolt 24, wherein the connecting rod 22 rests on the first disk 19, the suction and discharge pipe 14 is provided with a sliding hole; one end of the L-shaped block 23 slides in the sliding hole and is connected to the connecting rod 22, while the other end of the L-shaped block 23 rests against the outer wall of the suction and discharge pipe 14 and is provided with a positioning hole, wherein the connecting rod 22 is provided with a threaded hole, and the bolt 24 is guided through the positioning hole and the corresponding first through-hole 18 before being connected to the threaded hole.

[0029] Furthermore, the air bag 7 is also provided with a first water distribution opening 10, wherein the sand cleaning element is a fourth water drain pipe 12, the first water distribution opening 10 is connected to the first water inlet pipe 2 via the fourth water drain pipe 12, so that high-pressure sludge water can flush the first water inlet pipe 2 and the extrusion pump body 1.

[0030] During operation, the extrusion pump is operated, creating a vacuum in the suction and discharge pipe 14. Under this vacuum, the sludge flows through the suction and discharge pipe 14, the third water inlet pipe 15, and the first water inlet pipe 2 into the extrusion pump, and is then introduced into the first water outlet pipe 3 under the action of the extrusion pump; wherein: 1. A portion of the sludge in the first water drain pipe 3 is discharged directly into the outside environment. For this portion, the sludge suction and removal process is therefore complete. 2. The remaining sludge in the first water outlet pipe 3 is conveyed to the second water inlet pipe 5. The sludge is filtered through the filter device 4, removing particles. The resulting sludge water is discharged via the second water outlet pipe 6, ensuring that the filtered sludge water does not clog the water jet flushing element and reducing the return of particles to the tunnel.

[0031] The sludge water enters the air bag 7. Water is supplied to the interior of the air bag 7 via the water inlet opening 8 located on its upper surface. This serves to flush the pressurization device of the air bag 7 with clean water. The flushing water mixes with the sludge water and further dilutes it. Air is supplied to the interior of the air bag 7 via the air inlet opening 9, also located on its upper surface. This serves to pressurize the sludge water in the air bag 7 by pressurizing it with air, thus producing high-pressure sludge water. The air bag 7 is also provided with at least two water distribution openings for returning the high-pressure sludge water in the following two directions: 1. First return direction: The high-pressure sludge water is conveyed via the first water distribution opening 10 and the fourth water outlet pipe 12 to the first water inlet pipe 2 and then enters the extrusion pump body 1. This flushes the first water inlet pipe 2 and the extrusion pump body 1, preventing sludge sedimentation and clogging of the extrusion pump. Continuous sludge suction and removal is thus possible. 2. Second return direction: The high-pressure sludge water is diverted via the second water distribution opening 11 to four third water discharge pipes 16. It is finally discharged into the sludge in the tunnel via the high-pressure flushing pipe 17 at the end of the third water discharge pipe 16. The four third water discharge pipes 16 and a suction and conveying pipe 14 are mounted on a single support plate 13, with a predetermined distance maintained between the three components. The high-pressure sludge water dilutes the sludge in the tunnel and agitates it. The impact force drives the sludge into a vigorous flow, ensuring thorough mixing of the sludge with water. This prevents sludge clogging at the suction and conveying pipe 14, increases the efficiency of sludge suction and conveying, and reduces labor requirements.Furthermore, the losses caused by production interruptions during tunnel construction due to sludge cleaning are effectively avoided. Part of the impact force is directed towards the suction and discharge pipe 14. This allows the holes in the suction and discharge pipe 14 to be flushed and cleaned, preventing blockages.

[0032] If the depth of the sludge in the tunnel significantly exceeds the length of the suction and conveying pipe 14, the lower opening of the suction and conveying pipe 14 is opened. This allows the sludge to be transported both along the entire circumference of the side walls and across the bottom of the suction and conveying pipe 14, thereby increasing the sludge transport velocity. Fig.4: When the sludge depth in the tunnel is comparable to the length of the suction and discharge pipe 14, the lower opening end of the suction and discharge pipe 14 is closed. This prevents the suction and discharge pipe 14 from sticking to the tunnel floor during suction, which would otherwise hinder operation by the user. In this position, the third through-hole 21 of the first disc 19 is aligned with the gap on the second disc 20, while the third through-hole 21 of the second disc 20 is aligned with the gap on the first disc 19. The process of changing from the closed to the open position is as follows: First, the bolt 24 is removed, and the L-shaped block 23 is slid along the sliding hole so that the L-shaped block 23 rotates around the central axis of the suction and discharge pipe 14. The L-shaped block 23 drives the connecting rod 22 and the first disc 19 to rotate synchronously.The outer annular surface of the first disc 19 is embedded in the inner wall of the suction and discharge pipe 14. This rotation causes the third through-hole 21 of the first disc 19 to rotate, so that the third through-hole 21 of the first disc 19 is aligned with and connected to the third through-hole 21 of the second disc 20. The bolt 24 is then grasped and guided through the corresponding first through-hole 18. It is then connected to the threaded hole. To change from the open to the closed state, the L-shaped block 23 must be reversed. The operating principle remains identical to that described above.

[0033] The foregoing description merely represents a preferred embodiment of the present invention and is not intended to limit the present invention. All modifications, equivalent substitutions, improvements, etc., made within the scope of the spirit and principles of the present invention fall within the scope of protection of the present invention.

[0034] It should be noted that if the embodiment of the present invention includes directional terms such as "top" and "bottom", these directional terms are used only to explain the relative positional relationship and mode of movement, etc., between the individual components in a specific pose (e.g., as shown in the drawings). If the specific pose changes, the directional terms change accordingly.

[0035] Furthermore, the term "and / or" throughout the text means that three concurrent options are possible. For example, "A and / or B" includes option A, option B, or both A and B simultaneously. Furthermore, terms such as "first," "second," etc., which appear in the exemplary embodiment of the invention, serve purely descriptive purposes and are not to be understood as indicating or implying a relative meaning or implying the number of specified technical features. Consequently, features defined as "first," "second," etc., may explicitly or implicitly include at least one such feature. Furthermore, the term "several" means two or more.

[0036] Furthermore, technical solutions can be combined between different embodiments, but must be based on the fact that they can be implemented by people skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it must be assumed that such a combination of technical solutions does not exist and is not covered by the claimed scope of protection of the invention.

Claims

[1] Water jet-assisted sludge extraction and conveyance device, characterized by , that it comprises: an extrusion pump body (1) for supplying the drive for conveying sludge from the tunnel, wherein the extrusion pump body (1) is provided with a first water inlet pipe (2) for sludge supply and a first water outlet pipe (3) for conveying sludge; a return and processing pipeline for assisting the extrusion pump body (1) in suctioning and conveying the sludge, wherein the return and processing pipeline comprises a filter element, an air bag pressurization element and a water jet flushing element, wherein the filter element is configured to separate sludge water from the sludge coming from the extrusion pump body (1) and convey the sludge water to the air bag pressurization element, the air bag pressurization element is configured to pressurize and dilute the sludge water to obtain high-pressure sludge water, and convey the high-pressure sludge water to the water jet flushing element, the water jet flushing element is configured to return the high-pressure sludge water to the sludge in the tunnel; a suction and conveying element for suctioning sludge and conveying sludge to the first water inlet pipe (2); a sand cleaning element which is connected to the air bag pressurization element and is designed to return the high-pressure sludge water in the air bag pressurization element to the first water inlet pipe (2) and thereby flush the first water inlet pipe (2) and the extrusion pump body (1). [2] Water jet-assisted sludge extraction and conveying device according to claim 1, characterized by , that: the filter element comprises a filter device (4), a second water inlet pipe (5) and a second water outlet pipe (6), wherein the second water inlet pipe (5) is connected to the inlet opening of the filter device (4), while the second water outlet pipe (6) is connected to the outlet opening of the filter device (4), the second water inlet pipe (5) is connected to the first water outlet pipe (3), and the second water outlet pipe (6) is connected to the air bag pressurization element; the first water outlet pipe (3) is provided with at least two outlet openings, one of which is connected to the second water inlet pipe (5), while the other outlet opening discharges some of the sludge from the extrusion pump body (1) into the outside environment. [3] Water jet-assisted sludge extraction and conveying device according to claim 2, characterized by , that: the air bag pressurization element is an air bag (7) wherein the air inlet of the air bag (7) is connected to the second water outlet pipe (6), the air bag (7) is provided with a water filling opening (8) and an air filling opening (9) in order to pressurize the sludge water in the air bag (7) by pressurizing it with air and to obtain high-pressure sludge water, the air bag (7) is further provided with a second water distribution opening (11). [4] Water jet-assisted sludge extraction and conveying device according to claim 3, characterized by, that: the suction and conveying element comprises a support plate (13), a suction and conveying pipe (14) and a third water inlet pipe (15), wherein the suction and conveying pipe (14) is provided on the support plate (13); the upper opening end of the suction and conveying pipe (14) is connected to the first water inlet pipe (2) via the third water inlet pipe (15); several first through-holes (18) are arranged evenly distributed in the side wall of the suction and conveying pipe (14), which are designed to direct the sludge near the suction and conveying pipe (14) into the suction and conveying pipe (14). [5] Water jet-assisted sludge extraction and conveying device according to claim 4, characterized by, that: the water jet flushing element comprises a third water drain pipe (16) and several high-pressure flushing pipes (17); the several high-pressure flushing pipes (17) are arranged at equal intervals on the support plate (13) and uniformly surround the circumference of the suction and discharge pipe (14); the upper opening end of the high-pressure flushing pipe (17) is connected to the second water distribution opening (11) via the third water drain pipe (16); several second through-holes are arranged uniformly distributed in the side wall of the high-pressure flushing pipe (17), which are designed to release high-pressure sludge water to the sludge near the high-pressure flushing pipe (17). [6] Water jet-assisted sludge extraction and removal device according to claim 5, characterized by, that: the lower opening end of the high-pressure flushing pipe (17) is closed to prevent the support plate (13) and the suction and discharge pipe (14) from moving upwards and becoming detached from the sludge by the discharge of high-pressure sludge water. [7] Water jet-assisted sludge extraction and conveying device according to claim 6, characterized by , that: the suction and discharge pipe (14) is provided with an opening and closing piece with which the lower opening end of the suction and discharge pipe (14) can be opened or closed. [8] Water jet-assisted sludge extraction and conveying device according to claim 7, characterized by, that: the opening and closing piece comprises a first disk (19) and a second disk (20) which are stacked vertically, wherein several third through-holes (21) are arranged evenly distributed in the first disk (19) and the second disk (20), wherein a gap remains between two adjacent third through-holes (21) in each disk, the suction and discharge pipe (14) is further provided with an adjusting element for rotating and fixing the first disk (19); when the third through-holes (21) of the first disk (19) correspond one-to-one to the third through-holes (21) of the second disk (20), the lower opening end of the suction and discharge pipe (14) is in an open state;when the third through holes (21) of the first disc (19) are successively offset from the third through holes (21) of the second disc (20), the lower opening end of the suction and discharge pipe (14) is in a closed state. [9] Water jet-assisted sludge extraction and conveying device according to claim 8, characterized by, that: the adjusting element comprises a connecting rod (22), an L-shaped block (23) and a bolt (24), wherein the connecting rod (22) rests on the first disk (19), the suction and discharge pipe (14) is provided with a sliding hole; one end of the L-shaped block (23) slides in the sliding hole and is connected to the connecting rod (22), while the other end of the L-shaped block (23) rests against the outer wall of the suction and discharge pipe (14) and is provided with a positioning hole, wherein the connecting rod (22) is provided with a threaded hole, and the bolt (24) is guided through the positioning hole and the corresponding first through-hole (18) before being connected to the threaded hole. [10] Water jet-assisted sludge extraction and conveyance device according to one of claims 1-9, characterized by, that: the air bag (7) is further provided with a first water division opening (10), wherein the sand cleaning element is a fourth water drain pipe (12), the first water division opening (10) is connected to the first water inlet pipe (2) via the fourth water drain pipe (12), so that high-pressure sludge water can flush the first water inlet pipe (2) and the extrusion pump body (1).

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