Purification device for degrading suspended matters, ammonia nitrogen and total phosphorus in sewage draining exit in water environment

Abstract

The invention relates to the technical field of purification devices, in particular to a purification device for degrading suspended solids, ammonia nitrogen and total phosphorus in a sewage draining exit in a water environment, the purification device comprises a mounting plate, a fixed pipe is fixedly connected to the mounting plate, a plurality of clamping plates are slidably connected to the fixed pipe, the cross section of each clamping plate is T-shaped, and the cross section of each clamping plate is T-shaped. An aeration assembly is arranged on the mounting plate; a net cage is arranged on the surface of the end, away from the fixing pipe, of the mounting plate, a round hole communicated with the fixing pipe is formed in the mounting plate, the net cage is communicated with the round hole, and two fixing blocks with L-shaped cross sections are fixedly connected to the mounting plate. The net cage on the purification device can be overhauled and replaced conveniently, and when the net cage is damaged, the net cage can be rapidly replaced, so that the sewage treatment effect can be prevented from becoming poor, and the use of the purification device is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of purification devices, in particular to a purification device for degrading suspended matter, ammonia nitrogen and total phosphorus in a sewage outlet in a water environment. Background Art

[0002] With the continuous development of society and the continuous advancement of science and technology, the technology related to purification devices is also constantly improving. With the acceleration of the pace of urban modernization, sewage outlets are gradually being incorporated into the municipal pipeline network. However, due to objective factors such as large volume and difficulty in implementation in old urban areas, there are still sewage outlets that directly discharge into rivers and water bodies, causing direct pollution to the water environment. At present, purification devices will be installed at the sewage outlets to degrade suspended solids, ammonia nitrogen and total phosphorus in the water environment.

[0003] After the purification device currently used is installed, it is inconvenient to inspect and replace the purification components on the purification device. When the components in the purification component are damaged, the purification component cannot be quickly replaced, which can easily lead to a deterioration in the sewage treatment effect and is not conducive to the use of the purification device. Summary of the invention

[0004] The purpose of the present invention is to solve the following shortcomings in the prior art: after the purification device currently used is installed, it is inconvenient to repair and replace the purification components on the purification device. When the components in the purification component are damaged, the purification component cannot be quickly replaced, which easily leads to a deterioration of the sewage treatment effect and is not conducive to the use of the purification device. A purification device for degrading suspended matter, ammonia nitrogen and total phosphorus in the sewage outlet in the water environment is proposed.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A purification device for degrading suspended solids, ammonia nitrogen and total phosphorus in a sewage outlet in a water environment, comprising a mounting plate, a fixed pipe is fixedly connected to the mounting plate, a plurality of clamping plates are slidably connected to the fixed pipe, and the cross section of each clamping plate is T-shaped, and an aeration component is arranged on the mounting plate; A mesh box is arranged on the surface of the mounting plate away from one end of the fixed pipe, a circular hole connected to the fixed pipe is provided on the mounting plate, the mesh box is connected to the circular hole, two fixing blocks with L-shaped cross sections are fixedly connected to the mounting plate, the two fixing blocks are respectively arranged on both sides of the mesh box, the surface of the mesh box is fitted with the surfaces of the two fixing blocks, a filling cavity is provided in the mesh box, and the filling cavity is filled with volcanic rock ceramsite; A clamping assembly is provided on the two fixed blocks, and the clamping assembly includes a pressure rod slidably installed on the two fixed blocks. Two rubber blocks are fixedly connected to the pressure rod, and the surface of each rubber block is in contact with the upper surface of the mesh box. The cross-section of the pressure rod is concave in shape. A rotating assembly is provided on the mounting plate, and the rotating assembly includes a rotating block. The surface of the rotating block is in contact with the surface of the pressure rod.

[0006] Preferably, a circular groove is provided on the mounting plate, a sealing ring is clamped in the circular groove, the mesh box and the sealing ring are fixedly connected, a rotating rod with a T-shaped cross-section is rotatably connected to the mounting plate, the rotating block is fixedly connected to the rotating rod, the rotating rod is provided with anti-slip grooves, the rotating block is connected to the mounting plate by a locking bolt, and a plurality of equidistantly arranged threaded grooves are provided on the mounting plate.

[0007] Preferably, each of the fixing blocks is provided with a mounting cavity for the pressure rod to move up and down, a first spring is fixedly connected to the lower inner wall of the mounting cavity, and the first spring is fixedly connected to the pressure rod.

[0008] Preferably, the upper inner wall of each installation cavity is provided with an opening for connecting the pressure rod, and a sealing ring with a U-shaped cross section is fixedly connected to the inner wall of the opening, and the sealing ring is in close contact with the surface of the pressure rod.

[0009] Preferably, the aeration assembly comprises a transverse plate fixedly arranged on the surface of the mounting plate, an aerator is mounted on the transverse plate, a filter screen is arranged on the aerator, and an air pipe is mounted on the aerator.

[0010] Preferably, the cross section of the rotating rod is T-shaped, and the surface of the rotating rod is provided with anti-slip grooves.

[0011] Preferably, an annular sleeve is rotatably mounted on the fixed tube, the annular sleeve is arranged on the outside of the fixed tube, the inner wall of the annular sleeve is fixedly connected with a plurality of arc blocks arranged in a circular array, one end of each of the clamping plates is fixedly connected with a semicircular block, and the surface of the annular sleeve is fixedly connected with a plurality of anti-slip convex strips.

[0012] Preferably, each of the clamping plates is sleeved with a second spring, one end of the second spring is fixedly connected to the clamping plate, and the other end of the second spring is fixedly connected to the fixing tube.

[0013] Preferably, a conical sealing sleeve is fixedly connected to the inner wall of the fixed tube, and a rubber pad is fixedly connected to the surface of each clamping plate.

[0014] Preferably, an annular groove is provided on the fixed tube, and a plurality of support blocks are slidably connected in the annular groove, each of the support blocks is fixedly connected to the inner surface of the annular sleeve, an annular plate is fixedly connected to one end of the fixed tube, the annular plate is connected to the annular sleeve through a plurality of threaded rods, and a plurality of circular grooves are provided on the annular sleeve.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The sealing ring is clamped inside the circular groove, and the lower surface of the net box fits with the surfaces of the two fixed blocks. During the rotation of one end of the rotating block, the pressure rod will be pushed down along the fixed block until the two rubber blocks are tightly attached to the upper surface of the net box. At this time, under the joint clamping action of the pressure rod and the fixed block, the net box and the mounting plate can be prevented from relative movement. Finally, the locking bolt is rotated so that one end of it passes through the rotating block and is threadedly connected with the corresponding thread groove, which can prevent the rotating block from rotating at will, making it convenient to inspect and replace the net box on the purification device. When the net box is damaged, it can be quickly replaced, thereby preventing the sewage treatment effect from deteriorating, which is beneficial to the use of the purification device. The fixed pipe sleeve is arranged on the outside of the sewage pipe until the sewage pipe is in close contact with the inclined inner wall of the conical sealing sleeve, and the annular sleeve is rotated. During the rotation of each arc block, its arc surface will move against the arc surface of the corresponding semicircular block, thereby pushing the clamping plate to move until each rubber pad is in close contact with the outer surface of each side of the sewage pipe, and the sewage pipe can be clamped to avoid relative movement between the sewage pipe and the fixed pipe. When the fixed pipe or the mounting plate is aged, it is convenient to replace it and also convenient to quickly install the device, which is beneficial to the use of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the front structure of a purification device for degrading suspended solids, ammonia nitrogen and total phosphorus in a sewage outlet in a water environment proposed by the present invention; Figure 2 This is a schematic diagram of the side structure of a purification device for degrading suspended solids, ammonia nitrogen and total phosphorus in a sewage outlet in a water environment proposed by the present invention; Figure 3 This is a schematic diagram of the back structure of the purification device for degrading suspended solids, ammonia nitrogen and total phosphorus in a sewage outlet in a water environment proposed by the present invention; Figure 4 This is a schematic diagram of the partial internal structure of the back of the purification device for degrading suspended solids, ammonia nitrogen and total phosphorus in a sewage outlet in a water environment proposed by the present invention; Figure 5 This is a schematic diagram of the internal structure of the purifying device for degrading suspended solids, ammonia nitrogen and total phosphorus in a sewage outlet in a water environment proposed by the present invention; Figure 6 It is a schematic diagram of the side internal structure of the fixed tube and the annular sleeve in the present invention; Figure 7 for Figure 6 Schematic diagram of the locally enlarged structure of A in the middle.

[0017] In the figure: 1 mounting plate, 2 rubber pad, 3 clamping plate, 4 air pipe, 5 threaded rod, 6 annular sleeve, 7 annular plate, 8 fixed block, 9 net box, 10 pressure rod, 11 rotating block, 12 rotating rod, 13 fixed pipe, 14 locking bolt, 15 rubber block, 16 sealing ring, 17 filling cavity, 18 first spring, 19 conical sealing sleeve, 20 support block, 21 arc block, 22 second spring, 23 semicircular block, 24 filter screen, 25 aerator, 26 horizontal plate, 27 round groove, 28 round groove, 29 round hole. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] Reference Figure 1-Figure 7 A purification device for degrading suspended solids, ammonia nitrogen and total phosphorus in a sewage outlet in a water environment comprises a mounting plate 1, a fixed pipe 13 is fixedly connected to the mounting plate 1, a plurality of clamps 3 are slidably connected to the fixed pipe 13, the cross section of each clamp 3 is T-shaped, an aeration assembly is arranged on the mounting plate 1, a net box 9 is arranged on the surface of the mounting plate 1 away from one end of the fixed pipe 13, a circular hole 29 connected to the fixed pipe 13 is opened on the mounting plate 1, the net box 9 is connected to the circular hole 29, two fixed blocks 8 with L-shaped cross sections are fixedly connected to the mounting plate 1, the two fixed blocks 8 are respectively arranged on both sides of the net box 9, the surface of the net box 9 is in contact with the surfaces of the two fixed blocks 8, a filling cavity 17 is opened in the net box 9, and the filling cavity 17 is filled with volcanic rock ceramsite.

[0020] A clamping assembly is provided on the two fixed blocks 8, and the clamping assembly includes a pressure rod 10 slidably mounted on the two fixed blocks 8. Two rubber blocks 15 are fixedly connected to the pressure rod 10. The surface of each rubber block 15 is in contact with the upper surface of the net box 9. The cross-section of the pressure rod 10 is concave in shape. A rotating assembly is provided on the mounting plate 1, and the rotating assembly includes a rotating block 11. The surface of the rotating block 11 is in contact with the surface of the pressure rod 10. A circular groove 27 is provided on the mounting plate 1, and a sealing ring 16 is clamped in the circular groove 27. The net box 9 and the sealing ring 16 are fixedly connected. A rotating rod 12 with a T-shaped cross-section is rotatably connected to the mounting plate 1. The rotating block 11 and the rotating rod 12 are fixedly connected, and the rotating rod 12 is provided with anti-slip grooves.

[0021] The rotating block 11 is connected to the mounting plate 1 by a locking bolt 14. The mounting plate 1 is provided with a plurality of equidistantly arranged threaded grooves. Each fixed block 8 is provided with a mounting cavity for the pressure rod 10 to move up and down. The lower inner wall of the mounting cavity is fixedly connected with a first spring 18. The first spring 18 and the pressure rod 10 are fixedly connected, and the sealing ring 16 is clamped in the inside of the circular groove 27. The sealing ring 16 has good sealing performance when connected to the inner wall of the circular groove 27, so that the rotating rod 12 and the mounting plate 1 rotate relative to each other. During the rotation of one end of the rotating block 11, it will rotate against the upper surface of the concave pressure rod 10, and then push the pressure rod 10 to move down along the fixed block 8. During the sliding of the two ends of the pressure rod 10 in the mounting cavity, the first spring 18 is deformed, and the locking bolt 14 is rotated so that one end of it passes through the rotating block 11 and is threadedly connected to the corresponding threaded groove, thereby preventing the rotating block 11 from rotating at will.

[0022] The upper inner wall of each installation cavity is provided with an opening for connecting the pressure rod 10, and the inner wall of the opening is fixedly connected with a sealing ring with a U-shaped cross section. The sealing ring is in close contact with the surface of the pressure rod 10, and the sealing ring can improve the sealing performance when the pressure rod 10 and the fixed block 8 are connected, so as to prevent sewage from penetrating into the interior of the installation cavity from the connection between the pressure rod 10 and the fixed block 8, and effectively prevent the first spring 18 from being corroded. The aeration assembly includes a horizontal plate 26 fixedly arranged on the surface of the mounting plate 1, an aerator 25 is installed on the horizontal plate 26, a filter screen cover 24 is arranged on the aerator 25, and an air pipe 4 is installed on the aerator 25. The fan transports air to the aerator 25 through the air pipe 4. The bottom aeration can effectively increase the dissolved oxygen in the environment around the sewage outlet, so as to form an aerobic zone, which is beneficial for aerobic microorganisms to remove ammonia molecules. The filter screen cover 24 can effectively prevent the air outlet from being blocked.

[0023] The cross section of the rotating rod 12 is T-shaped, and the surface of the rotating rod 12 is provided with anti-skid patterns, which can increase the friction when connected with the rotating rod 12 to avoid slipping. An annular sleeve 6 is rotatably installed on the fixed tube 13, and the annular sleeve 6 is sleeved on the outside of the fixed tube 13. The inner wall of the annular sleeve 6 is fixedly connected with a plurality of arc blocks 21 arranged in an annular array, and one end of each clamping plate 3 is fixedly connected with a semicircular block 23. The surface of the annular sleeve 6 is fixedly connected with a plurality of anti-skid convex strips, and each clamping plate 3 is sleeved with a second spring 22, and the second spring 2 2 is fixedly connected to the clamping plate 3, and the other end of the second spring 22 is fixedly connected to the fixed tube 13. Then, the annular sleeve 6 is rotated, and the support block 20 slides along the annular groove at the same time. The annular groove can limit the movement trajectory of the annular sleeve 6. During the rotation of each arc block 21, its arc surface will gradually move against the arc surface of the corresponding semicircular block 23, thereby pushing the clamping plate 3 to move. During the relative sliding of the clamping plate 3 and the fixed tube 13, the second spring 22 is deformed, and the anti-slip convex strip can increase the friction when contacting with the annular sleeve 6.

[0024] The inner wall of the fixed pipe 13 is fixedly connected with a conical sealing sleeve 19, and the surface of each clamping plate 3 is fixedly connected with a rubber pad 2. The fixed pipe 13 is sleeved on the outer side of the sewage pipe until the sewage pipe is in close contact with the oblique inner wall of the conical sealing sleeve 19, so as to ensure that the sewage pipe and the fixed pipe 13 are well sealed. When each rubber pad 2 is in close contact with the outer surface of each side of the sewage pipe, the sewage pipe can be clamped to prevent the sewage pipe and the fixed pipe 13 from moving relative to each other. An annular groove is provided on the fixed pipe 13, and a plurality of support blocks 20 are slidably connected in the annular groove. Each support block 20 is fixedly connected to the inner surface of the annular sleeve 6. One end of the fixed pipe 13 is fixedly connected with an annular plate 7, and the annular plate 7 is connected to the annular sleeve 6 through a plurality of threaded rods 5. A plurality of circular grooves 28 are provided on the annular sleeve 6. One end of each threaded rod 5 is passed through the annular plate 7 and is threadedly connected to the corresponding circular groove 28 to prevent the annular sleeve 6 from rotating at will.

[0025] In the present invention, during installation, the sealing ring 16 is first clamped in the inside of the circular groove 27. The sealing ring 16 has good sealing performance when connected to the inner wall of the circular groove 27. At this time, the lower surface of the net box 9 fits the surface of the two fixed blocks 8, and the friction force when the net box 9 and the fixed blocks 8 are connected is relatively large. Then, the rotating rod 12 and the mounting plate 1 are rotated relative to each other, and the rotating block 11 will rotate with the rotating rod 12. During the rotation of one end of the rotating block 11, it will rotate against the upper surface of the concave pressure rod 10, and then push the pressure rod 10 to move down along the fixed block 8. During the sliding of the two ends of the pressure rod 10 in the installation cavity, the first spring 18 is deformed until the two rubber blocks 15 are tightly attached to the upper surface of the net box 9. At this time, under the joint clamping action of the pressure rod 10 and the fixed block 8, the net box 9 and the mounting plate 1 can be prevented from relative movement.

[0026] Finally, the locking bolt 14 is rotated so that one end of the locking bolt 14 passes through the rotating block 11 and is threadedly connected with the corresponding thread groove, so as to prevent the rotating block 11 from rotating at will, and to facilitate the inspection and replacement of the net box 9 on the purification device. When the net box 9 is damaged, the net box 9 can be quickly replaced, thereby preventing the sewage treatment effect from deteriorating, which is beneficial to the use of the purification device. The mounting plate 1 is installed at the sewage outlet, and one end of the air pipe 4 is connected to an external fan (not shown). The fan transports air through the air pipe 4 to the aerator 25, and the bottom aeration can effectively increase the surrounding air around the sewage outlet. The dissolved oxygen in the environment is convenient for forming an aerobic zone, which is beneficial for aerobic microorganisms to remove ammonia molecules. The filter screen 24 can effectively prevent the gas outlet from being blocked. The sewage discharged through the sewage outlet will fall into the net box 9. The volcanic rock ceramsite filled in the net box 9 has a large number of cavities and channels of uniform size and a fixed diameter. Substances smaller than this diameter can be adsorbed by it, and suspended matter and total phosphorus can be effectively filtered by the volcanic rock ceramsite. At the same time, ammonia nitrogen is a polar molecule, and its molecule is smaller than the diameter of the pores of the volcanic rock ceramsite. The volcanic rock ceramsite has a strong adsorption capacity for ammonia and can effectively filter out suspended matter, ammonia nitrogen and total phosphorus.

[0027] When in use, the fixed pipe 13 can be sleeved on the outer side of the sewage pipe until the sewage pipe is in close contact with the inclined inner wall of the conical sealing sleeve 19, so as to ensure that the sewage pipe and the fixed pipe 13 are well sealed. Then, the annular sleeve 6 is rotated, and the supporting block 20 slides along the annular groove at the same time. During the rotation of each arc block 21, its arc surface will gradually move against the arc surface of the corresponding semicircular block 23, thereby pushing the clamping plate 3 to move. During the relative sliding between the clamping plate 3 and the fixed pipe 13, the second spring 22 is deformed, and each clamping plate 3 will extend toward the inside of the fixed pipe 13 at the same time until each rubber pad 2 is in close contact with the outer surface of each side of the sewage pipe, thereby clamping the sewage pipe to avoid relative movement between the sewage pipe and the fixed pipe 13. Then, one end of each threaded rod 5 is passed through the annular plate 7 and threadedly connected with the corresponding circular groove 28 to prevent the annular sleeve 6 from rotating at will. When the fixed pipe 13 or the mounting plate 1 is aged, it is convenient to replace it, and it is also convenient to quickly install the device, which is beneficial to the use of the device.

[0028] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A purification device for degrading suspended solids, ammonia nitrogen and total phosphorus in a sewage outlet in a water environment, comprising a mounting plate (1), characterized in that: A fixed pipe (13) is fixedly connected to the mounting plate (1), a plurality of clamping plates (3) are slidably connected to the fixed pipe (13), and the cross section of each clamping plate (3) is T-shaped; an aeration assembly is arranged on the mounting plate (1); A net box (9) is arranged on a surface of the mounting plate (1) away from one end of the fixed tube (13); a circular hole (29) communicating with the fixed tube (13) is provided on the mounting plate (1); the net box (9) is communicated with the circular hole (29); two fixing blocks (8) having an L-shaped cross section are fixedly connected to the mounting plate (1); the two fixing blocks (8) are respectively arranged on two sides of the net box (9); the surface of the net box (9) is in contact with the surfaces of the two fixing blocks (8); a filling cavity (17) is provided in the net box (9); the filling cavity (17) is filled with volcanic rock ceramsite; A clamping assembly is provided on the two fixed blocks (8), and the clamping assembly includes a pressure rod (10) slidably mounted on the two fixed blocks (8). Two rubber blocks (15) are fixedly connected to the pressure rod (10), and the surface of each rubber block (15) is in contact with the upper surface of the net box (9). The cross-section of the pressure rod (10) is concave in shape. A rotating assembly is provided on the mounting plate (1), and the rotating assembly includes a rotating block (11). The surface of the rotating block (11) is in contact with the surface of the pressure rod (10).

2. The purification device for degrading suspended solids, ammonia nitrogen and total phosphorus in a sewage outlet in a water environment according to claim 1, characterized in that: The mounting plate (1) is provided with a circular groove (27), a sealing ring (16) is clamped in the circular groove (27), the net box (9) and the sealing ring (16) are fixedly connected, a rotating rod (12) with a T-shaped cross section is rotatably connected to the mounting plate (1), the rotating block (11) and the rotating rod (12) are fixedly connected, the rotating rod (12) is provided with anti-slip grooves, the rotating block (11) is connected to the mounting plate (1) via a locking bolt (14), and a plurality of thread grooves arranged at equal intervals are provided on the mounting plate (1).

3. The purification device for degrading suspended solids, ammonia nitrogen and total phosphorus in a sewage outlet in a water environment according to claim 1, characterized in that: Each of the fixing blocks (8) is provided with a mounting cavity for the pressure rod (10) to move up and down, a first spring (18) is fixedly connected to the lower inner wall of the mounting cavity, and the first spring (18) and the pressure rod (10) are fixedly connected.

4. The purification device for degrading suspended solids, ammonia nitrogen and total phosphorus in a sewage outlet in a water environment according to claim 3, characterized in that: The upper inner wall of each installation cavity is provided with an opening for connecting the pressure rod (10), and a sealing ring with a U-shaped cross section is fixedly connected to the inner wall of the opening, and the sealing ring is in close contact with the surface of the pressure rod (10).

5. The purification device for degrading suspended solids, ammonia nitrogen and total phosphorus in a sewage outlet in a water environment according to claim 1, characterized in that: The aeration assembly comprises a transverse plate (26) fixedly arranged on the surface of the mounting plate (1), an aerator (25) being mounted on the transverse plate (26), a filter screen (24) being arranged on the aerator (25), and an air pipe (4) being mounted on the aerator (25).

6. The purification device for degrading suspended solids, ammonia nitrogen and total phosphorus in a sewage outlet in a water environment according to claim 2, characterized in that: The cross section of the rotating rod (12) is T-shaped, and the surface of the rotating rod (12) is provided with anti-slip grooves.

7. The purification device for degrading suspended solids, ammonia nitrogen and total phosphorus in a sewage outlet in a water environment according to claim 1, characterized in that: An annular sleeve (6) is rotatably mounted on the fixed tube (13), the annular sleeve (6) being sleeved on the outside of the fixed tube (13), a plurality of arc-shaped blocks (21) arranged in an annular array being fixedly connected to the inner wall of the annular sleeve (6), a semicircular block (23) being fixedly connected to one end of each of the clamping plates (3), and a plurality of anti-slip convex strips being fixedly connected to the surface of the annular sleeve (6).

8. The purification device for degrading suspended solids, ammonia nitrogen and total phosphorus in a sewage outlet in a water environment according to claim 1, characterized in that: A second spring (22) is sleeved on each of the clamping plates (3); one end of the second spring (22) is fixedly connected to the clamping plate (3), and the other end of the second spring (22) is fixedly connected to the fixing tube (13).

9. The purification device for degrading suspended solids, ammonia nitrogen and total phosphorus in a sewage outlet in a water environment according to claim 1, characterized in that: A conical sealing sleeve (19) is fixedly connected to the inner wall of the fixed tube (13), and a rubber pad (2) is fixedly connected to the surface of each clamping plate (3).

10. The purification device for degrading suspended solids, ammonia nitrogen and total phosphorus in a sewage outlet in a water environment according to claim 7, characterized in that: The fixed tube (13) is provided with an annular groove, a plurality of support blocks (20) are slidably connected in the annular groove, each of the support blocks (20) is fixedly connected to the inner surface of the annular sleeve (6), an annular plate (7) is fixedly connected to one end of the fixed tube (13), the annular plate (7) is connected to the annular sleeve (6) via a plurality of threaded rods (5), and a plurality of circular grooves (28) are provided on the annular sleeve (6).

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