A convenient dredging pipeline for water conservancy projects and its dredging method

Abstract

The present invention discloses a convenient dredging pipeline for water conservancy projects and a dredging method thereof, which relates to the technical field of water conservancy projects. In order to solve the problems that the existing river dredging pipelines for water conservancy projects need to rely on other equipment for auxiliary dredging during use, which is relatively complex, and most of the pipelines in the existing water conservancy projects are connected together by flange assembly, it is difficult to know which section of the pipeline is blocked, and the dredging work for the blockage is also relatively inconvenient. It includes a first branch pipe and a support outer frame. A support platform is arranged at the bottom of the support outer frame, and a load-bearing bottom plate is arranged at the bottom of the support platform. The support platform is integrally formed with the support outer frame and the load-bearing bottom plate; it also includes: a second branch pipe, which is arranged inside the first branch pipe. The second branch pipe is integrally formed with the first branch pipe. The vertical center line of the second branch pipe is symmetrically distributed with the vertical center line of the first branch pipe, and movable sleeves are arranged at both ends of the second branch pipe.

Description

Technical Field

[0001] The present invention relates to the technical field of water conservancy projects, and specifically to a convenient dredging pipeline for water conservancy projects and a dredging method thereof. Background Technique

[0002] Water conservancy projects refer to various projects built to control, regulate, and utilize surface water and groundwater in nature to achieve the purpose of eliminating disasters and bringing benefits. Water conservancy projects can be divided into flood control projects (dikes, reservoirs, flood storage and detention areas, culverts and sluices, drainage projects, etc.), farmland water conservancy projects (irrigation projects), hydropower projects, shipping, and urban water supply and drainage projects according to their service objects.

[0003] For example, the application number is: 202011241130.6 (named a river dredging pipeline and a dredging method for water conservancy projects), including a hull. A protective shell is bolted to the top of the hull. A first motor is arranged inside the protective shell. A sleeve is arranged through the hull. A threaded rod is arranged inside the sleeve, and the threaded rod extends to the top and bottom of the sleeve. A mounting seat is bolted to the top of the sleeve. The output shaft of the first motor is bolted with a driving gear. A driven gear is rotatably connected to the top of the mounting seat. The driven gear is threadedly connected to the threaded rod. A connecting seat is bolted to the bottom end of the threaded rod. A fixing frame is bolted to one side of the connecting seat. A dredging pipe is bolted to one side of the fixing frame. A dredging mechanism is arranged inside the fixing frame and the dredging pipe. A mud suction pipe is communicated with the top of the dredging pipe. A mud suction mechanism is bolted to the inner cavity of the hull. The mud suction mechanism is communicated with the dredging pipe through the mud suction pipe. A limiting mechanism is bolted to one side of the hull.

[0004] When the above-mentioned river dredging pipeline for water conservancy projects is in use, it needs to rely on other equipment for auxiliary dredging, which is relatively complicated. Moreover, most of the pipelines in existing water conservancy projects are assembled and connected by flanges, and it is difficult to know which section of the pipeline is blocked, and the dredging work for blockages is also relatively inconvenient. Therefore, we provide a convenient dredging pipeline for water conservancy projects and a dredging method thereof. Summary of the Invention

[0005] The purpose of the present invention is to provide a convenient dredging pipeline for water conservancy projects and a dredging method thereof, so as to solve the problems in the above-mentioned background technique that the existing river dredging pipeline for water conservancy projects needs to rely on other equipment for auxiliary dredging during use, which is relatively complicated, and most of the pipelines in existing water conservancy projects are assembled and connected by flanges, and it is difficult to know which section of the pipeline is blocked, and the dredging work for blockages is also relatively inconvenient.

[0006] To achieve the above object, the present invention provides the following technical solution: A convenient dredging pipeline for water conservancy projects, including a first branch pipe and a support outer frame. A support platform is provided at the bottom of the support outer frame, and a load-bearing bottom plate is provided at the bottom of the support platform. The support platform is integrally formed with the support outer frame and the load-bearing bottom plate;

[0007] It further includes:

[0008] A second branch pipe, which is arranged inside the first branch pipe. The second branch pipe is integrally formed with the first branch pipe. The vertical center line of the second branch pipe is symmetrically distributed with the vertical center line of the first branch pipe, and movable sleeves are provided at both ends of the second branch pipe;

[0009] End head threads, which are arranged at one end of the movable sleeve. The end head threads are integrally formed with the movable sleeve, and a sealing end pipe is installed at one end of the end head threads. A flange is provided at one end of the sealing end pipe, and the flange is integrally formed with the sealing end pipe;

[0010] Inner lining slideways, which are arranged on the inner wall of the movable sleeve. The inner lining slideways are integrally formed with the movable sleeve, and a clamping end plate is arranged inside the inner lining slideways. The clamping end plate is integrally formed with the first branch pipe, and a socket port is sleeved at one end position of the inner lining slideways;

[0011] An inner lining frame, which is arranged inside the support outer frame. The inner lining frame is integrally formed with the support outer frame, and an inner lining circular groove is arranged inside the inner lining frame. The inner lining circular groove is integrally formed with the inner lining frame, and the flange is located inside the inner lining circular groove;

[0012] A flowmeter, which is installed on the outer walls of the first branch pipe and the second branch pipe. The sensing end of the flowmeter is located inside the second branch pipe.

[0013] Preferably, roller grooves are arranged on the inner wall of the inner lining circular groove. The roller grooves are integrally formed with the inner lining circular groove. Contact rollers are arranged inside the roller grooves. Flange corresponding grooves are arranged on the outer wall of the contact rollers. The flange corresponding grooves are integrally formed with the contact rollers. The flange is in contact connection with the outer wall of the contact rollers through the flange corresponding grooves.

[0014] Preferably, connecting shafts are arranged on both outer walls of the contact rollers. The connecting shafts are integrally formed with the contact rollers. Bearing seats are arranged on both inner walls of the roller grooves. The contact rollers are movably connected with the bearing seats through the connecting shafts.

[0015] Preferably, two limit blocks are installed on the outer wall of the first branch pipe. The limit blocks are in contact connection with the movable sleeve. First screw holes and second screw holes are respectively arranged on the outer wall of the first branch pipe and inside the limit blocks.

[0016] Preferably, the first screw hole and the second screw hole are integrally formed with the first branch pipe and the limit block respectively. A fastening bolt is installed inside the first screw hole and the second screw hole, and the limit block is fixedly connected to the outer wall of the first branch pipe through the fastening bolt.

[0017] Preferably, the diameter of the socket port is equal to the diameter of the first branch pipe, and the socket port is mechanically sealed with the first branch pipe.

[0018] Preferably, a transmission handle is provided on the outer wall of the sealed end pipe, and the transmission handle is integrally formed with the sealed end pipe.

[0019] Preferably, a socket screw groove is provided inside the sealed end pipe, and the socket screw groove is integrally formed with the sealed end pipe. The sealed end pipe is thread-sealed and installed with the end head through the socket screw groove.

[0020] Preferably, four internal connection grooves are provided at the bottom of the load-bearing bottom plate, and the internal connection grooves are integrally formed with the load-bearing bottom plate. Grounding rollers are provided inside all four internal connection grooves.

[0021] Preferably, a dredging method for a convenient dredging pipeline for water conservancy projects includes the following steps:

[0022] Step 1: Install the limit block on the outer wall of the first branch pipe, and then seal and connect multiple dredging pipelines through flange plates. The distance between adjacent flange plates is sealed with corresponding thickness sealing rings.

[0023] Step 2: Observe the flow rate of each pipeline through the flow meter. When the value of the flow meter is lower than the rated value, the pipeline where the flow meter is located and the next pipeline behind it are removed for dredging. During the removal process, there is no need to remove other pipelines.

[0024] Step 3: When disassembling, use a horizontal disassembly method. First, remove the limit blocks of the two pipelines adjacent to the left and right of these two pipelines, then unscrew the flange bolts, and then turn the transmission handle to unscrew the sealed end pipe. During the unscrewing process, force the flange plate to squeeze and push the two pipelines adjacent to the left and right.

[0025] Step 4: After the movable sleeves of the two pipelines adjacent to the left and right are subjected to the squeezing and pushing force, the movable sleeves contract and move through the limit socket connection between the inner lining slideway and the positioning end plate.

[0026] Step 5: After the sealed end pipe is unscrewed, remove the first branch pipe, the second branch pipe and the two movable sleeves that are removed, and then use a special dredging rod to dredge the blocked parts inside the second branch pipe and the two movable sleeves.

[0027] Step 6: After dredging and silt cleaning are completed, reinstall the sealed end pipe on the outer frame of the bracket to the end position of the movable sleeve in a threaded connection manner, and reassemble the pipeline through flange bolts and sealing rings.

[0028] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0029] 1. In the present invention, the limit blocks of the two adjacent pipelines on the left and right are removed, then the flange bolts are unscrewed, and then the transmission handle is rotated to unscrew the sealed end pipe. During the unscrewing process, the flange is forced to squeeze and push the two adjacent pipelines on the left and right. After the sealed end pipe is unscrewed, the first branch pipe, the second branch pipe, and the two movable sleeves removed are taken off, and then a special dredging rod is used to dredge and clean the blocked parts inside the second branch pipe and the two movable sleeves, achieving the purpose of removing one section of the branch pipe of the pipeline without moving the corresponding position of the flange, and also facilitating subsequent reassembly, with the minimum amplitude of disassembly and dredging of the pipeline, overcoming the problems that the existing river dredging pipelines for water conservancy projects need to rely on other equipment for auxiliary dredging during use, which is relatively complex, and the dredging work for blockages is also relatively inconvenient.

[0030] 2. By observing the flow rate of each pipeline through the flowmeter, when the value of the flowmeter is lower than the rated value, the pipeline where the flowmeter is located and the subsequent pipeline are removed for dredging. During the disassembly process, there is no need to disassemble other pipelines, overcoming the problem in the prior art that most of the water conservancy project pipelines are assembled and connected by flanges, and it is difficult to know which section of the pipeline is blocked.

[0031] 3. After the movable sleeves of the two adjacent pipelines on the left and right are subjected to the squeezing and pushing force, the movable sleeves shrink through the limit socket connection between the inner lining slideway and the positioning end plate. The diameter of the socket port is equal to the diameter of the first branch pipe, and the socket port is mechanically sealed with the first branch pipe, playing a role in preventing the leakage of the fluid inside the pipeline. Description of the Drawings

[0032] Figure 1 It is a schematic diagram of the overall structure of the convenient dredging pipeline for water conservancy projects of the present invention;

[0033] Figure 2 It is a schematic diagram of the overall structure of the first branch pipe of the present invention;

[0034] Figure 3 It is a schematic diagram of the connection structure between the first branch pipe and the movable sleeve of the present invention;

[0035] Figure 4 It is a schematic diagram of the internal structure of the inner lining frame of the present invention;

[0036] Figure 5 It is a schematic diagram of the internal structure of the roller groove of the present invention;

[0037] Figure 6 Schematic diagram of the installation structure of the limit clamping block of the present invention;

[0038] In the figure: 1. First branch pipe; 2. Flowmeter; 3. Movable sleeve; 4. Sealed end pipe; 5. Flange; 6. Transmission lever; 7. Outer frame of the bracket; 8. Inner lining frame; 9. Bracket platform; 10. Load-bearing bottom plate; 11. Inner connection groove; 12. Grounding roller; 13. Inner lining slideway; 14. Positioning end plate; 15. Socket port; 16. Second branch pipe; 17. Limit clamping block; 18. End thread; 19. Socket thread groove; 20. Inner lining circular groove; 21. Roller groove; 22. Contact roller; 23. Connecting shaft; 24. Bearing seat; 25. Flange corresponding groove; 26. First screw hole; 27. Second screw hole; 28. Fastening bolt. Specific embodiments

[0039] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0040] Please refer to Figures 1-6 , an embodiment provided by the present invention: A convenient dredging pipeline for water conservancy projects includes a first branch pipe 1 and an outer frame 7 of the bracket. A bracket platform 9 is provided at the bottom of the outer frame 7 of the bracket, and a load-bearing bottom plate 10 is provided at the bottom of the bracket platform 9. The bracket platform 9 is integrally formed with the outer frame 7 of the bracket and the load-bearing bottom plate 10;

[0041] It also includes:

[0042] A second branch pipe 16, which is arranged inside the first branch pipe 1. The second branch pipe 16 is integrally formed with the first branch pipe 1. The vertical center line of the second branch pipe 16 is symmetrically distributed with the vertical center line of the first branch pipe 1, and movable sleeves 3 are provided at both ends of the second branch pipe 16;

[0043] An end thread 18, which is arranged at one end of the movable sleeve 3. The end thread 18 is integrally formed with the movable sleeve 3, and a sealed end pipe 4 is installed at one end of the end thread 18. A flange 5 is provided at one end of the sealed end pipe 4. The flange 5 is integrally formed with the sealed end pipe 4;

[0044] An inner lining slideway 13, which is arranged on the inner wall of the movable sleeve 3. The inner lining slideway 13 is integrally formed with the movable sleeve 3, and a positioning end plate 14 is arranged inside the inner lining slideway 13. The positioning end plate 14 is integrally formed with the first branch pipe 1. A socket port 15 is arranged at one end of the inner lining slideway 13;

[0045] The inner lining frame 8 is arranged inside the bracket outer frame 7. The inner lining frame 8 and the bracket outer frame 7 are integrally formed. And an inner lining circular groove 20 is arranged inside the inner lining frame 8. The inner lining circular groove 20 and the inner lining frame 8 are integrally formed. The flange plate 5 is located inside the inner lining circular groove 20.

[0046] The flowmeter 2 is installed on the outer walls of the first branch pipe 1 and the second branch pipe 16. The sensing end of the flowmeter 2 is located inside the second branch pipe 16.

[0047] Please refer to Figure 4 and Figure 5 , a roller groove 21 is arranged on the inner wall of the inner lining circular groove 20. The roller groove 21 and the inner lining circular groove 20 are integrally formed. A contact roller 22 is arranged inside the roller groove 21. A flange corresponding groove 25 is arranged on the outer wall of the contact roller 22. The flange corresponding groove 25 and the contact roller 22 are integrally formed. The flange plate 5 is in contact connection with the outer wall of the contact roller 22 through the flange corresponding groove 25. The roller groove 21 arranged on the inner wall of the inner lining circular groove 20 serves to carry the contact roller 22 and assist the flange plate 5 in rotating.

[0048] Please refer to Figure 5 , connecting shafts 23 are arranged on both outer walls of the contact roller 22. The connecting shafts 23 and the contact roller 22 are integrally formed. Bearing seats 24 are arranged on both inner walls of the roller groove 21. The contact roller 22 is movably connected to the bearing seats 24 through the connecting shafts 23. The connecting shafts 23 arranged on both outer walls of the contact roller 22 serve to be movably connected to the bearing seats 24.

[0049] Please refer to Figure 6 , two limit blocks 17 are installed on the outer wall of the first branch pipe 1. The limit blocks 17 are in contact connection with the movable sleeve 3. First screw holes 26 and second screw holes 27 are respectively arranged on the outer wall of the first branch pipe 1 and inside the limit blocks 17. The two limit blocks 17 installed on the outer wall of the first branch pipe 1 serve to limit the movable sleeve 3.

[0050] Please refer to Figure 6 , the first screw hole 26 and the second screw hole 27 are respectively integrally formed with the first branch pipe 1 and the limit block 17. A fastening bolt 28 is installed inside the first screw hole 26 and the second screw hole 27. The limit block 17 is fixedly connected to the outer wall of the first branch pipe 1 through the fastening bolt 28. The fastening bolt 28 installed inside the first screw hole 26 and the second screw hole 27 serves to facilitate the firm installation of the limit block 17.

[0051] Please refer to Figure 3 , the diameter of the socket port 15 is equal to the diameter of the first branch pipe 1. The socket port 15 is mechanically sealed with the first branch pipe 1, serving to prevent the leakage of the fluid inside the pipeline.

[0052] Please refer to Figure 2 , a driving handle rod 6 is arranged on the outer wall of the sealed end pipe 4. The driving handle rod 6 is integrally formed with the sealed end pipe 4. The driving handle rod 6 arranged on the outer wall of the sealed end pipe 4 serves to facilitate the rotation of the sealed end pipe 4.

[0053] Please refer to Figure 3 , a socket screw groove 19 is arranged inside the sealed end pipe 4. The socket screw groove 19 is integrally formed with the sealed end pipe 4. The sealed end pipe 4 is hermetically installed with the end head thread 18 through the socket screw groove 19. The socket screw groove 19 arranged inside the sealed end pipe 4 serves to facilitate the threaded sealing installation of the sealed end pipe 4.

[0054] Please refer to Figure 1 , four internal connection grooves 11 are arranged at the bottom of the load-bearing bottom plate 10. The internal connection grooves 11 are integrally formed with the load-bearing bottom plate 10. Grounding rollers 12 are arranged inside all four internal connection grooves 11. The four internal connection grooves 11 arranged at the bottom of the load-bearing bottom plate 10 serve to carry the grounding rollers 12.

[0055] Please refer to Figures 1-6 , a dredging method for a convenient dredging pipeline in a water conservancy project, comprising the following steps:

[0056] Step 1: Install the limit block 17 on the outer wall of the first branch pipe 1, and then the multiple dredging pipelines are hermetically connected through the flange 5. The spacing between adjacent flanges 5 is sealed by corresponding thickness sealing rings;

[0057] Step 2: Observe the flow conditions of each pipeline through the flowmeter 2. When the value of the flowmeter 2 is lower than the rated value, the pipeline where the flowmeter 2 is located and the subsequent pipeline are disassembled for dredging. During the disassembly process, there is no need to disassemble other pipelines;

[0058] Step 3: During disassembly, adopt a horizontal disassembly method. First, remove the limit blocks 17 of the two pipelines adjacent to the left and right of these two pipelines, then unscrew the flange bolts, and then rotate the driving handle rod 6 to unscrew the sealed end pipe 4. During the unscrewing process, force the flange 5 to squeeze and push the two pipelines adjacent to the left and right;

[0059] Step 4: After the movable sleeves 3 of the two pipelines adjacent to the left and right are subjected to the squeezing and pushing force, the movable sleeves 3 contract and move through the limit socket connection of the inner lining slideway 13 and the clamping end plate 14;

[0060] Step 5: After the sealed end pipe 4 is unscrewed, remove the first branch pipe 1, the second branch pipe 16 and the two movable sleeves 3 that are disassembled, and then use a special dredging rod to dredge the blocked parts inside the second branch pipe 16 and the two movable sleeves 3;

[0061] Step Six: After dredging and cleaning are completed, reinstall the sealed end pipe 4 on the outer frame 7 of the bracket to the end position of the movable sleeve 3 in a threaded connection manner, and reassemble the pipeline through flange bolts and sealing rings.

[0062] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A convenient dredging pipeline for water conservancy projects, comprising a first branch pipe (1) and a support outer frame (7). A support platform (9) is arranged at the bottom of the support outer frame (7), and a load-bearing bottom plate (10) is arranged at the bottom of the support platform (9). The support platform (9) is integrally formed with the support outer frame (7) and the load-bearing bottom plate (10); It is characterized in that: It further comprises: A second branch pipe (16), which is arranged inside the first branch pipe (1). The second branch pipe (16) is integrally formed with the first branch pipe (1), the second branch pipe (16) is coaxial with the first branch pipe (1), and movable sleeves (3) are arranged at both ends of the second branch pipe (16); End threads (18), which are arranged at one end of the movable sleeve (3). The end threads (18) are integrally formed with the movable sleeve (3), and a sealing end pipe (4) is installed at one end of the end threads (18). A flange plate (5) is arranged at one end of the sealing end pipe (4), and the flange plate (5) is integrally formed with the sealing end pipe (4); Inner lining slideways (13), which are arranged on the inner wall of the movable sleeve (3). The inner lining slideways (13) are integrally formed with the movable sleeve (3), and a clamping end plate (14) is arranged inside the inner lining slideways (13). The clamping end plate (14) is integrally formed with the first branch pipe (1). A socket port (15) is arranged at one end of the inner lining slideways (13); Inner lining frame (8), which is arranged inside the support outer frame (7). The inner lining frame (8) is integrally formed with the support outer frame (7), and an inner lining circular groove (20) is arranged inside the inner lining frame (8). The inner lining circular groove (20) is integrally formed with the inner lining frame (8). The flange plate (5) is located inside the inner lining circular groove (20); A flowmeter (2), which is installed on the outer walls of the first branch pipe (1) and the second branch pipe (16). The sensing end of the flowmeter (2) is located inside the second branch pipe (16); On the inner wall of the inner lining circular groove (20), a roller groove (21) is provided. The roller groove (21) is integrally formed with the inner lining circular groove (20). Inside the roller groove (21), a contact roller (22) is provided. On the outer wall of the contact roller (22), a flange corresponding groove (25) is provided. The flange corresponding groove (25) is integrally formed with the contact roller (22). The flange plate (5) is in contact connection with the outer wall of the contact roller (22) through the flange corresponding groove (25). On both outer walls of the contact roller (22), connecting shafts (23) are provided. The connecting shafts (23) are integrally formed with the contact roller (22). On both inner walls of the roller groove (21), bearing seats (24) are provided. The contact roller (22) is movably connected to the bearing seats (24) through the connecting shafts (23). A first screw hole (26) and a second screw hole (27) are integrally formed on the first branch pipe (1) and the limit clamping block (17) respectively. Inside the first screw hole (26) and the second screw hole (27), a fastening bolt (28) is installed. The limit clamping block (17) is fixedly connected to the outer wall of the first branch pipe (1) through the fastening bolt (28). The diameter of the socket port (15) is equal to the diameter of the first branch pipe (1). The socket port (15) is mechanically sealed to the first branch pipe (1).

2. A kind of convenient dredging pipeline for water conservancy projects according to claim 1, characterized in that: On the outer wall of the sealing end pipe (4), a transmission handle rod (6) is provided. The transmission handle rod (6) is integrally formed with the sealing end pipe (4).

3. A kind of convenient dredging pipeline for water conservancy projects according to claim 2, characterized in that: Inside the sealing end pipe (4), a socket screw groove (19) is provided. The socket screw groove (19) is integrally formed with the sealing end pipe (4). The sealing end pipe (4) is hermetically installed with the end thread (18) through the socket screw groove (19).

4. A kind of convenient dredging pipeline for water conservancy projects according to claim 3, characterized in that: At the bottom of the load-bearing bottom plate (10), four internal connection grooves (11) are provided. The internal connection grooves (11) are integrally formed with the load-bearing bottom plate (10). Inside each of the four internal connection grooves (11), a grounding roller (12) is provided.

5. A dredging method of a kind of convenient dredging pipeline for water conservancy projects according to claim 4, characterized in that, including the following steps: Step 1: Install the limit clamping block (17) on the outer wall of the first branch pipe (1), and then combine and seal the connections of multiple dredging pipelines through the flange plates (5). The spacing between adjacent flange plates (5) is sealed by corresponding thickness sealing rings; Step 2: Observe the flow conditions of each pipeline through the flowmeter (2). When the value of the flowmeter (2) is lower than the rated value, the pipeline where the flowmeter (2) is located and the subsequent pipeline are disassembled for dredging. During the disassembly process, there is no need to disassemble other pipelines; Step 3: During disassembly, a horizontal disassembly method is adopted. First, remove the limit blocks (17) of the two pipes adjacent to the left and right of these two pipes, then unscrew the flange bolts, and then rotate the transmission lever (6) to unscrew the sealed end pipe (4). During the unscrewing process, force the flange plate (5) to squeeze and push the two pipes adjacent to the left and right; Step 4: After the movable sleeves (3) of the two pipes adjacent to the left and right are subjected to the squeezing and pushing force, the movable sleeves (3) perform a contraction movement through the limit socket connection between the inner lining slideway (13) and the positioning end plate (14); Step 5: After the sealed end pipe (4) is unscrewed, remove the removed first branch pipe (1), second branch pipe (16) and the two movable sleeves (3), and then use a special dredging rod to dredge the blockages inside the second branch pipe (16) and the two movable sleeves (3); Step 6: After the dredging and cleaning are completed, reinstall the sealed end pipe (4) on the bracket outer frame (7) to the end position of the movable sleeve (3) in a threaded connection manner, and reassemble the pipes through flange bolts and sealing rings.

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