Water conveying pipeline capable of automatically exhausting air and keeping flow

Abstract

The utility model belongs to the technical field of water conveying pipelines, and particularly relates to an automatic exhausting and flow keeping water conveying pipeline which comprises a pipe body. The number of the pipe bodies is two. Exhaust pipes are mounted at the end parts of the two pipe bodies; the end part of the pipe body is fixedly connected with a first connecting seat; the end part of the exhaust pipe is fixedly connected with two second connecting seats; a plurality of fastening bolts are mounted in the middles of the first connecting seat and the second connecting seat; an exhaust valve is mounted in the middle of the exhaust pipe; a filtering assembly, a cleaning assembly and a defoaming assembly are mounted in the exhaust pipe; the filtering assembly comprises two mounting plates; the two mounting plates are fixedly connected to the inner side wall of the exhaust pipe; through the structure, silt and impurities in water can be effectively prevented from entering the exhaust valve, residual particles moving along with water flow are synchronously filtered in the exhaust process, abrasion of the inner wall of the exhaust valve can be effectively reduced, and the situation that the impurities in the water flow cover an exhaust hole in the exhaust valve or block a floating ball is effectively reduced.

Description

Technical Field

[0001] This utility model belongs to the field of water pipeline technology, specifically an automatic air venting and flow-preserving water pipeline. Background Technology

[0002] Water pipelines refer to the general term for pipelines that transport water from a distant water source to a location where water is needed. Water pipelines typically take different structural forms, such as tree-like structures, ring structures, and mesh structures.

[0003] In water conservancy projects, automatic air venting and flow maintenance water pipelines are integrated automatic air venting devices that enable the discharge of gas inside the water pipeline and maintain stable water flow. Automatic air vents are usually installed at locations prone to gas accumulation, such as high points, bends, and slope changes in the pipeline. Utilizing the principles of buoyancy or pressure difference, the vents automatically open when gas accumulates, discharge the gas, and then quickly close, reducing liquid leakage.

[0004] During the air release process in water pipelines, impurities such as scale and silt may be present inside the water flow. These impurities will enter the air release valve with the water flow and gradually accumulate at the air release port. Long-term accumulation can easily lead to blockage of the air release port, causing the air release valve to have difficulty releasing air normally.

[0005] Therefore, this utility model provides an automatic venting and flow-preserving water pipeline. Utility Model Content

[0006] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0007] The technical solution adopted by this utility model to solve its technical problem is as follows: An automatic venting and flow-maintaining water supply pipe of this utility model includes a pipe body; two pipe bodies are provided; vent pipes are installed at the ends of the two pipe bodies; a first connecting seat is fixedly connected to the end of the pipe body; two second connecting seats are fixedly connected to the end of the vent pipe; multiple fastening bolts are installed in the middle of the first and second connecting seats; an vent valve is installed in the middle of the vent pipe; a filter assembly, a cleaning assembly, and a defoaming assembly are installed inside the vent pipe; the filter assembly includes two mounting plates; the two mounting plates are fixedly connected to the inner wall of the vent pipe; the two mounting plates are located on both sides of the end of the vent valve; a mounting groove is opened in the middle of the mounting plate; two sliding grooves are opened in the middle of the mounting plate; the two sliding grooves are located on both sides of the mounting plate; a spring is fixedly connected in the middle of the sliding groove; a fixing device is fixedly connected to the end of the spring. The mounting plate has two grooves on its side wall; the grooves are positioned at corresponding sliding groove positions; an adjusting plate is fixedly connected to the end of the fixing rod; the adjusting plate is slidably connected to the middle of the groove; a fixing block is installed in the middle of the mounting plate; a fixing hole is opened in the middle of the fixing block; two fixing rods are positioned in the middle of the fixing hole; a sliding groove is fixedly connected to the side wall of the fixing block; springs are fixedly connected to the bottom of the two sliding grooves; the above structure can effectively intercept mud and impurities in the water from entering the air vent valve, and simultaneously filter residual particles moving with the water flow during the air venting process, effectively reducing wear on the inner wall of the air vent valve, effectively reducing impurities in the water flow from covering the air vent or blocking the float ball in the air vent valve, effectively reducing blockage of the valve body channel inside the air vent valve, maintaining smooth air venting, and allowing for quick installation and removal of the spring, which can be quickly replaced after a period of use.

[0008] Preferably, the cleaning assembly includes a lead screw; the lead screw is rotatably connected to the middle of the exhaust pipe; one end of the lead screw passes through the middle of the exhaust pipe; a rotating handle is fixedly connected to the end of the lead screw; the rotating handle is disposed outside the exhaust pipe; a rotating seat is rotatably connected to the other end of the lead screw; the rotating seat is fixedly connected to the inner wall of the exhaust pipe; a nut is installed in the middle of the lead screw; a cleaning brush is fixedly connected to the middle of the nut; the cleaning brush is disposed in the middle of the spring; the above structure can scrape off impurities attached to the surface of the spring, effectively reducing the gradual accumulation of impurities on the surface of the spring when water flows through, reducing blockage caused by impurity accumulation in the middle of the spring, reducing long-term corrosion and wear of the spring surface caused by impurities, and maintaining the filtering effect of the spring, increasing the exhaust efficiency of the exhaust valve.

[0009] Preferably, the defoaming assembly includes a fixing plate; the fixing plate is installed at the end of the pipe body; the defoaming assembly has a plurality of honeycomb holes in the middle; a plurality of needle rods are fixedly connected to the middle of the fixing plate; the above structure can effectively remove some of the tiny bubbles in the water flow, reduce the difficulty of subsequent venting, improve the venting effect, and the plurality of honeycomb holes can effectively make the water flow pressure distribution more uniform, reduce the formation of new gas nuclei in local low-pressure areas, and effectively reduce the generation of secondary bubbles.

[0010] Preferably, a sealing ring is fixedly connected to the middle of the second connecting seat; a sealing groove is opened in the middle of the first connecting seat; the sealing ring is installed inside the corresponding sealing groove; the above structure can effectively increase the sealing performance at the connection between the pipe body and the exhaust pipe, effectively seal the end of the pipe body and the exhaust pipe, and reduce leakage when water flows through the end of the pipe body and the exhaust pipe.

[0011] Preferably, the inner wall of the exhaust pipe is provided with a threaded groove; an installation ring is installed in the middle of the threaded groove; the fixing plate is fixedly connected to the middle of the installation ring; a rotating rod is fixedly connected to one side of the middle of the fixing plate; the above structure enables the fixing plate to be installed and disassembled quickly, effectively increasing the maintenance efficiency of the fixing plate, and the operation is simple and quick.

[0012] Preferably, a sealing gasket is fixedly connected to the middle of the slide groove and the spring; the sealing gasket is disposed between the slide groove and the spring and the inner wall of the exhaust pipe; the above structure enables the contact surfaces between the slide groove and the spring and the exhaust pipe to fit tightly, reducing the entry of particulate impurities into the exhaust valve due to gaps, and effectively maintaining the filtering effect of the spring.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. The automatic venting and flow-maintaining water pipeline of this utility model can effectively intercept mud and impurities in the water from entering the venting valve through the above structure. During the venting process, it can simultaneously filter residual particles moving with the water flow, effectively reduce wear on the inner wall of the venting valve, effectively reduce impurities in the water flow from covering the venting hole in the venting valve or blocking the float ball, effectively reduce blockage of the valve body channel inside the venting valve, maintain smooth venting, and allow for quick installation and disassembly of the spring. When the spring has been used for a period of time, it can be quickly replaced.

[0015] 2. The automatic venting and flow-maintaining water pipeline of this utility model can scrape off impurities attached to the surface of the spring through the above structure, effectively reducing the gradual accumulation of impurities on the surface of the spring as water flows through, reducing blockage caused by impurity accumulation in the middle of the spring, reducing long-term corrosion and wear of the spring surface caused by impurities, maintaining the filtering effect of the spring, and increasing the venting efficiency of the venting valve. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 This is a perspective view of the present invention;

[0018] Figure 2 This is a cross-sectional view of the exhaust pipe in this utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the filter assembly in this utility model;

[0020] Figure 4 This is a schematic diagram of the cleaning component in this utility model.

[0021] In the diagram: 1. Pipe body; 11. Exhaust pipe; 12. Exhaust valve; 13. First connecting seat; 14. Second connecting seat; 15. Fastening bolt; 2. Filter assembly; 21. Mounting plate; 22. Mounting groove; 23. Slide groove; 24. Spring; 25. Fixing rod; 26. Groove; 27. Adjusting plate; 28. Fixing block; 29. ​​Fixing hole; 3. Cleaning assembly; 31. Lead screw; 32. Rotating handle; 33. Rotating seat; 34. Nut; 35. Cleaning brush; 4. Defoaming assembly; 41. Fixing plate; 42. Honeycomb holes; 43. Needle rod; 5. Sealing ring; 51. Sealing groove; 6. Threaded groove; 61. Mounting ring; 62. Rotating rod; 7. Sealing gasket. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0023] like Figures 1 to 4As shown, an automatic venting and flow-maintaining water supply pipe according to an embodiment of the present invention includes a pipe body 1; two pipe bodies 1 are provided; vent pipes 11 are installed at the ends of the two pipe bodies 1; a first connecting seat 13 is fixedly connected to the end of the pipe body 1; two second connecting seats 14 are fixedly connected to the end of the vent pipe 11; a plurality of fastening bolts 15 are installed in the middle of the first connecting seat 13 and the second connecting seat 14; an vent valve 12 is installed in the middle of the vent pipe 11; a filter assembly 2, a cleaning assembly 3, and a defoaming assembly 4 are installed inside the vent pipe 11; the filter assembly 2 includes two mounting plates 21; the two mounting plates 21 are fixedly connected to the inner side wall of the vent pipe 11; the two mounting plates 21 are arranged on both sides of the end of the vent valve 12; the mounting plates Mounting plate 21 has a mounting groove 22 in the middle; mounting plate 21 has two sliding grooves 23 in the middle; the two sliding grooves 23 are located on both sides of mounting plate 21; springs 24 are fixedly connected to the middle of the sliding grooves 23; fixing rods 25 are fixedly connected to the ends of the springs 24; mounting plate 21 has two grooves 26 on the side wall; the grooves 26 are located at the corresponding positions of the sliding grooves 23; adjusting plates 27 are fixedly connected to the ends of the fixing rods 25; adjusting plates 27 are slidably connected to the middle of the grooves 26; mounting plate 21 has a fixing block 28 in the middle; fixing block 28 has a fixing hole 29 in the middle; two fixing rods 25 are located in the middle of the fixing hole 29; sliding grooves 23 are fixedly connected to the side wall of fixing block 28; springs 24 are fixedly connected to the bottom of the two sliding grooves 23.During operation, the first connecting seat 13 is fitted with the corresponding second connecting seat 14. Multiple sealing rings 5 ​​connect the exhaust pipe 11 to the two pipe bodies 1. When water flows through the pipe body 1 and into the exhaust pipe 11, air is expelled through the exhaust valve 12. As water flows through, some air bubbles are first removed by the defoaming assembly 4, and then particulate impurities in the water passing through the exhaust valve 12 are filtered by the filter assembly 2. Before installing the exhaust pipe 11 in the middle of the two pipe bodies 1, the spring 24 is placed inside the exhaust pipe 11. The spring 24 is then moved upwards to the corresponding exhaust valve 12 position. At this time, the two sliding grooves 23 are fitted against the side wall of the mounting plate 21. The two adjusting plates 27 are moved to one side, causing the fixing rod 25 to slide inside the sliding groove 23. The spring 24 elastically contracts with the fixing rod 25, and the two fixing blocks 28 enter the middle of the corresponding mounting groove 22. Loosening the adjusting plate 27 allows the spring 24 to push the fixing rod 25, causing the fixing rod 25 to enter the fixing hole 29. The fixing rod 25 then fixes the fixing block 28, thus installing the spring 24. The vent pipe 11 is then installed between the two pipe bodies 1. When water flows through, the spring 24 intercepts particulate impurities in the water flow, preventing them from entering the middle of the vent valve 12. This structure effectively intercepts mud and impurities in the water from entering the vent valve 12. During the venting process, residual particles moving with the water flow are simultaneously filtered, effectively reducing wear on the inner wall of the vent valve 12, reducing impurities in the water flow from covering the vent hole or obstructing the float, and reducing blockage in the valve body channel inside the vent valve 12. This ensures smooth venting and allows for quick installation and removal of the spring 24, which can be quickly replaced after a period of use.

[0024] like Figure 2 and Figure 4As shown, the cleaning assembly 3 includes a lead screw 31; the lead screw 31 is rotatably connected to the middle of the exhaust pipe 11; one end of the lead screw 31 passes through the middle of the exhaust pipe 11; a rotating handle 32 is fixedly connected to the end of the lead screw 31; the rotating handle 32 is located outside the exhaust pipe 11; the other end of the lead screw 31 is rotatably connected to a rotating seat 33; the rotating seat 33 is fixedly connected to the inner wall of the exhaust pipe 11; a nut 34 is installed in the middle of the lead screw 31; a cleaning brush 35 is fixedly connected to the middle of the nut 34; the cleaning brush 35 is located in the middle of the spring 24; during operation, after the spring 24 has been used for a period of time, the rotating handle 32 is rotated, and the lead screw 31 is rotated by rotating the handle 32. The exhaust pipe 11 rotates internally, and at this time, the end of the lead screw 31 rotates in the middle of the rotating seat 33. When the lead screw 31 rotates, the nut 34 moves in the middle of the lead screw 31. When the nut 34 moves, the cleaning brush 35 cleans the middle of the spring 24. Through the above structure, the impurities attached to the surface of the spring 24 can be scraped off, which can effectively reduce the accumulation of impurities on the surface of the spring 24 when water flows through, reduce the blockage caused by the accumulation of impurities in the middle of the spring 24, reduce the long-term corrosion and wear of impurities on the surface of the spring 24, and maintain the filtration effect of the spring 24, and increase the exhaust efficiency of the exhaust valve 12.

[0025] like Figure 2 and Figure 4 As shown, the defoaming assembly 4 includes a fixing plate 41; the fixing plate 41 is installed at the end of the pipe body 1; the defoaming assembly 4 has several honeycomb holes 42 in the middle; several needle rods 43 are fixedly connected to the middle of the fixing plate 41; during operation, after the fixing plate 41 is installed inside one end of the exhaust pipe 11, the water flow first passes through the middle of the fixing plate 41, and then contacts the air bubbles in the water flow through the ends of several needle rods 43. When the air bubbles contact the ends of the needle rods 43, they are punctured, removing the air bubbles from the water flow. The airflow then passes through several honeycomb holes 42 and is discharged to the other end. The above structure can effectively remove some of the tiny air bubbles in the water flow, reduce the difficulty of subsequent exhaust, improve the exhaust effect, and the several honeycomb holes 42 can effectively make the water flow pressure distribution more uniform, reduce the formation of new air nuclei in local low-pressure areas, and effectively reduce the generation of secondary air bubbles.

[0026] like Figure 2 As shown, a sealing ring 5 is fixedly connected to the middle of the second connecting seat 14; a sealing groove 51 is opened in the middle of the first connecting seat 13; the sealing ring 5 is installed inside the corresponding sealing groove 51; during operation, when the exhaust pipe 11 is installed at the ends of the two pipe bodies 1, the sealing ring 5 is first fitted into the corresponding sealing groove 51. At this time, the sealing ring 5 is elastically contracted by the extrusion force and enters the interior of the sealing groove 51. The sealing ring 5 seals the first connecting seat 13 and the fastening bolt 15. The above structure can effectively increase the sealing performance at the connection between the pipe body 1 and the exhaust pipe 11, effectively seal the ends of the pipe body 1 and the exhaust pipe 11, and reduce leakage when water flows through the ends of the pipe body 1 and the exhaust pipe 11.

[0027] like Figure 2 and Figure 4 As shown, a threaded groove 6 is provided on the inner wall of the exhaust pipe 11; an installation ring 61 is installed in the middle of the threaded groove 6; a fixing plate 41 is fixedly connected to the middle of the installation ring 61; a rotating rod 62 is fixedly connected to one side of the middle of the fixing plate 41; when installing the fixing plate 41, first insert the installation ring 61 from one end of the exhaust pipe 11 so that the installation ring 61 enters the corresponding position of the threaded groove 6, and rotate the rotating rod 62 to make the installation ring 61 rotate in the position of the threaded groove 6, thereby fixing the fixing plate 41 inside the exhaust pipe 11. The above structure allows for quick installation and removal of the fixing plate 41, effectively increasing the maintenance efficiency of the fixing plate 41, and the operation is simple and quick.

[0028] like Figure 2 and Figure 3 As shown, a sealing gasket 7 is fixedly connected to the middle of the slide groove 23 and the spring 24; the sealing gasket 7 is disposed between the slide groove 23 and the spring 24 and the inner wall of the exhaust pipe 11; during operation, the sealing gasket 7 fills the gap between the slide groove 23 and the spring 24 and the inner wall of the exhaust pipe 11, so that the slide groove 23 and the spring 24 are tightly fitted to the inner wall of the exhaust pipe 11. Through the above structure, the contact surfaces between the slide groove 23 and the spring 24 and the exhaust pipe 11 can be tightly fitted, reducing the entry of particulate impurities into the exhaust valve 12 due to gaps, and effectively maintaining the filtering effect of the spring 24.

[0029] During operation, the first connecting seat 13 is fitted with the corresponding second connecting seat 14, and the exhaust pipe 11 is connected to the two pipe bodies 1 through multiple sealing rings 5. When water flows through the pipe body 1 and passes inside the exhaust pipe 11, the air in the pipe is discharged through the exhaust valve 12. When the water flows through, some air bubbles in the water flow are first removed by the defoaming assembly 4, and then the particulate impurities in the water passing through the end of the exhaust valve 12 are filtered by the filter assembly 2. Before installing the exhaust pipe 11 in the middle of the two pipe bodies 1, the spring 24 is placed inside the exhaust pipe 11, and then the spring 24 is moved upward to the position of the corresponding exhaust valve 12. At this time, the two sliding grooves 23 and the mounting plate 21 are connected. With the sidewalls aligned, move the two adjusting plates 27 to one side, causing the fixing rod 25 to slide inside the groove 23. At this time, the spring 24 elastically contracts with the fixing rod 25, and the two fixing blocks 28 enter the middle of the corresponding mounting groove 22. Release the adjusting plates 27, and the fixing rod 25 is pushed by the spring 24, causing the fixing rod 25 to enter the fixing hole 29. The fixing block 28 is fixed by the fixing rod 25, thus installing the spring 24. Then, install the exhaust pipe 11 between the two pipe bodies 1. When water flows through, the spring 24 intercepts particulate impurities in the water flow and enters the middle of the exhaust valve 12. After the spring 24 has been used for a period of time, rotate the handle 32 to... Rotating handle 32 causes lead screw 31 to rotate inside exhaust pipe 11. At this time, the end of lead screw 31 rotates in the middle of rotating seat 33. When lead screw 31 rotates, nut 34 moves in the middle of lead screw 31. When nut 34 moves, cleaning brush 35 cleans the middle of spring 24. After fixing plate 41 is installed inside one end of exhaust pipe 11, water flow first passes through the middle of fixing plate 41, and then contacts air bubbles in the water flow through the ends of several needle rods 43. When air bubbles contact the ends of needle rods 43, they are punctured, removing air bubbles from the water flow. The airflow then passes through several honeycomb holes 42 and is discharged to the other end. When exhaust pipe 11 is installed at the ends of two pipe bodies 1, first... When the sealing ring 5 is fitted into the sealing groove 51, the sealing ring 5 is subjected to compressive force and elastically contracts and enters the interior of the sealing groove 51. The sealing ring 5 seals the first connecting seat 13 and the fastening bolt 15. When installing the fixing plate 41, first insert the mounting ring 61 from one end of the exhaust pipe 11, so that the mounting ring 61 enters the corresponding thread groove 6 position. Rotate the rotating rod 62 to make the mounting ring 61 rotate in the thread groove 6 position, thereby fixing the fixing plate 41 inside the exhaust pipe 11. The sealing gasket 7 fills the gap between the sliding groove 23 and the spring 24 and the inner wall of the exhaust pipe 11, so that the sliding groove 23 and the spring 24 are tightly fitted to the inner wall of the exhaust pipe 11.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A self-venting and flow preserving water delivery conduit comprising a tube (1); characterized in that: Two pipe bodies (1) are provided with exhaust pipes (11) at the ends; the first connecting seat (13) is fixedly connected to the end of the pipe body (1); the second connecting seat (14) is fixedly connected to the end of the exhaust pipe (11); the first connecting seat (13) and the second connecting seat (14) are provided with a plurality of fastening bolts (15) in the middle; the exhaust pipe (11) is provided with an exhaust valve (12) in the middle; the filter assembly (2), the cleaning assembly (3) and the bubble removal assembly (4) are installed inside the exhaust pipe (11).

2. An automatic air vented flow retaining water delivery conduit according to claim 1, wherein: The filter assembly (2) comprises two mounting plates (21); the mounting plates (21) are fixedly connected to the inner side wall of the exhaust pipe (11); the mounting plates (21) are arranged on both sides of the end of the exhaust valve (12); the mounting plate (21) is provided with a mounting groove (22) in the middle; the mounting plate (21) is provided with two sliding grooves (23) in the middle; the sliding grooves (23) are arranged on both sides of the mounting plate (21); the spring (24) is fixedly connected to the middle of the sliding groove (23); the fixed rod (25) is fixedly connected to the end of the spring (24); the recess (26) is formed in the side wall of the mounting plate (21); the recess (26) is arranged at the position corresponding to the sliding groove (23); the adjusting plate (27) is fixedly connected to the end of the fixed rod (25); the adjusting plate (27) is slidingly connected to the middle of the recess (26); the mounting plate (21) is provided with a fixed block (28) in the middle; the fixed block (28) is provided with a fixed hole (29) in the middle; the fixed rod (25) is arranged in the middle of the fixed hole (29); the sliding groove (23) is fixedly connected to the side wall of the fixed block (28); the spring (24) is fixedly connected to the bottom of the sliding groove (23).

3. An automatic air vented flow retaining water delivery conduit according to claim 2, wherein: The cleaning assembly (3) comprises a lead screw (31); the lead screw (31) is rotatably connected to the middle of the exhaust pipe (11); one end of the lead screw (31) penetrates the middle of the exhaust pipe (11); the rotating handle (32) is fixedly connected to the end of the lead screw (31); the rotating handle (32) is arranged outside the exhaust pipe (11); the rotating seat (33) is rotatably connected to the other end of the lead screw (31); the rotating seat (33) is fixedly connected to the inner side wall of the exhaust pipe (11); the nut (34) is arranged in the middle of the lead screw (31); the cleaning brush (35) is fixedly connected to the middle of the nut (34); the cleaning brush (35) is arranged in the middle of the spring (24).

4. The self-venting, flow-preserving water delivery tube of claim 1, wherein: The bubble removal assembly (4) comprises a fixed plate (41); the fixed plate (41) is arranged at the end of the pipe body (1); a plurality of honeycomb holes (42) are formed in the middle of the bubble removal assembly (4); a plurality of needle rods (43) are fixedly connected to the middle of the fixed plate (41).

5. The self-venting, flow-preserving water delivery tube of claim 1, wherein: The second connecting seat (14) is fixedly connected with a sealing ring (5); the first connecting seat (13) is provided with a sealing groove (51) in the middle; the sealing ring (5) is arranged inside the corresponding sealing groove (51).

6. An automatic air vented flow retaining water delivery conduit according to claim 4, wherein: The inner side wall of the exhaust pipe (11) is provided with a threaded groove (6); the middle part of the threaded groove (6) is provided with a mounting ring (61); the middle part of the mounting ring (61) is fixedly connected with a fixed plate (41); one side of the middle part of the fixed plate (41) is fixedly connected with a rotating rod (62).

7. An automatic air relief and flow retaining water delivery conduit as defined in claim 2, wherein: The middle part of the chute (23) and the spring (24) is fixedly connected with a sealing gasket (7); the sealing gasket (7) is arranged between the chute (23), the spring (24) and the inner side wall of the exhaust pipe (11).

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