Anti-blocking cyclone separator

Abstract

The anti-blocking cyclone separator comprises a cylinder section, an inverted cone section and an anti-blocking assembly, gas containing particles enters the cylinder section from a gas inlet pipe, the gas flows along the inner wall of the cylinder section and is guided to form a rotating vortex, and the gas flows downwards towards the inverted cone section in a spiral shape along the cylinder section; the particles are thrown to the inner wall of the inverted cone section under the action of centrifugal force, the particles lose inertia force and fall to the discharging pipe along the wall face, radial airflow in the center spirally rises to enter the exhaust pipe and is discharged, the piston rod is driven to retract, the rod portion of the piston rod drives the scraping sleeve to move downwards, and the outer edge of the scraping sleeve moves downwards along the inner wall of the discharging pipe; residues on the inner wall of the discharging pipe are swept into the material box, particles are scraped into the material box, the piston rod drives the scraping sleeve to automatically scrape along the inner wall of the discharging pipe, blockage is effectively broken, the residual particles are collected, the separation efficiency is kept in continuous operation, the shutdown maintenance requirement is reduced, and the working efficiency of the cyclone separator is improved.

Description

Technical Field

[0001] This utility model relates to the field of gas-solid separation technology, and in particular to a cyclone separator that prevents clogging. Background Technology

[0002] Existing cyclone separators include a cylindrical section and an inverted conical section. Gas enters the cylindrical section through the inlet pipe and flows along the inner wall of the cylindrical section, forming a rotating vortex. The gas then flows spirally downwards along the cylindrical section towards the inverted conical section. Under the action of centrifugal force, particles are thrown against the inner wall of the inverted conical section and slide down, exiting through the discharge pipe at the bottom of the inverted conical section. The gas after gas-solid separation spirals upwards and exits through the exhaust pipe. The inner diameter of the inverted conical section decreases continuously from top to bottom, and the opening of the discharge pipe is relatively small. If there are many particles in the gas, the separated particles can easily clog the discharge pipe, resulting in low working efficiency.

[0003] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model discloses an anti-clogging cyclone separator to solve the problem that if the discharge pipe opening is small and there are many particles in the gas, the separated particles can easily clog the discharge pipe, resulting in low working efficiency.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A clog-resistant cyclone separator, characterized in that it comprises:

[0007] A cylindrical section is provided with an air inlet pipe on its outer side along the tangential direction of the cylindrical section. The air inlet direction of the air inlet pipe is perpendicular to the axial direction of the cylindrical section. An exhaust pipe is provided at the top of the cylindrical section. The bottom end of the exhaust pipe extends into the cylindrical section and connects to the cylindrical section.

[0008] An inverted conical section is connected to the bottom end of the cylindrical section and communicates with the cylindrical section. A discharge pipe is provided at the bottom of the inverted conical section.

[0009] An anti-clogging component is disposed at the bottom end of the inverted cone section, and the anti-clogging component includes:

[0010] A piston rod, the bottom end of which is coaxially located at the bottom end of the discharge pipe, and the top end of which extends into the inverted conical section;

[0011] A scraper sleeve, which is coaxially disposed at the top end of the piston rod;

[0012] A material box, wherein the material box is located at the bottom end of the discharge pipe and is connected to the material box;

[0013] The piston rod is driven to retract, and the scraper sleeve retracts from the inverted conical section to the bottom of the discharge pipe. The outer edge of the scraper sleeve sweeps the residue on the inner wall of the discharge pipe downwards into the material box.

[0014] A further technical solution is that the scraper sleeve is inverted conical in shape, the scraper sleeve is made of flexible material, and the outer diameter of the top end of the scraper sleeve is larger than the inner diameter of the discharge pipe.

[0015] A further technical solution is that the scraper sleeve is coaxially sleeved on the outer side of the top end of the piston rod, the smaller inner diameter end of the scraper sleeve is connected to the outer side of the piston rod, and the top part of the piston rod extends into the inner side of the scraper sleeve and is connected to the inner side of the scraper sleeve.

[0016] A further technical solution is that the material box includes two half-frames, the two half-frames having the same structure, and the two half-frames symmetrically arranged on both sides of the bottom end of the discharge pipe to form the material box; a first arc segment is opened at the top of the half-frame near the discharge pipe, the radius of the first arc segment matches the outer diameter of the discharge pipe, and the two first arc segments enclose to form a first circular hole, through which the discharge pipe passes; a second arc segment is opened at the bottom of the half-frame near the discharge pipe, the radius of the second arc segment matches the outer diameter of the piston rod, and the two second arc segments enclose to form a second circular hole, through which the piston rod passes.

[0017] A further technical solution is that the half-frame is provided with a number of connecting parts, the material box includes fasteners, two half-frames are symmetrically arranged on both sides of the bottom end of the discharge pipe, the connecting parts of the two half-frames are fitted together, the fasteners pass through the fitted connecting parts and are locked, and the two half-frames are fastened together to form a material box.

[0018] A further technical solution is that arc-shaped sealing gaskets are provided on the surfaces of both the first arc segment and the second arc segment.

[0019] A further technical solution is that the inner top of the cylindrical section is provided with a cylindrical segment, which is coaxially located on the outer side of the exhaust pipe.

[0020] A further technical solution is that a plurality of support plates are provided inside the cylindrical section, and the plurality of support plates are distributed at intervals along the circumference of the cylindrical section. The outer end of the support plate is connected to the inner wall of the cylindrical section, and the inner end of the support plate is connected to the outer wall of the section.

[0021] A further technical solution is that an inspection tube is provided on the outer side of the cylindrical section in a direction perpendicular to the axis of the cylindrical section. The inspection tube is connected to the cylindrical section, and a matching flange cover is provided at the outer end of the inspection tube.

[0022] The beneficial effects of this utility model embodiment are as follows:

[0023] (i) A cyclone separator with anti-clogging features includes a cylindrical section, an inverted conical section, and an anti-clogging component. Gas containing particles enters the cylindrical section through the inlet pipe. The gas flows along the inner wall of the cylindrical section and is guided to form a rotating vortex. It then flows spirally downward along the cylindrical section toward the inverted conical section. Under the action of centrifugal force, the particles are thrown toward the inner wall of the inverted conical section. The particles lose inertia and fall along the wall to the discharge pipe. The radial airflow in the center spirals upward and enters the exhaust pipe and is discharged, driving the piston rod to retract. The rod of the piston rod drives the scraper sleeve to move downward. The outer edge of the scraper sleeve moves downward along the inner wall of the discharge pipe, cleaning the residue on the inner wall of the discharge pipe into the material box. The particles are scraped off into the material box. The piston rod drives the scraper sleeve to automatically scrape along the inner wall of the discharge pipe, effectively breaking up the blockage and collecting the residual particles. It maintains separation efficiency during continuous operation, reduces downtime maintenance requirements, and improves the working efficiency of the cyclone separator.

[0024] (ii) Furthermore, the scraper sleeve is inverted conical in shape and made of flexible material. The outer diameter of the top of the scraper sleeve is slightly larger than the inner diameter of the discharge pipe. For example, the scraper sleeve is coaxially sleeved on the outer side of the top of the piston rod, and the end of the scraper sleeve with a smaller inner diameter is connected to the outer side of the piston rod. The top part of the piston rod extends into the inner side of the scraper sleeve and connects to the inner side of the scraper sleeve. The inverted conical flexible scraper sleeve, through its interference fit design with an outer diameter at its top slightly larger than the inner diameter of the discharge pipe, generates radial expansion force by relying on the elastic deformation of the flexible material when the piston rod retracts. This ensures that the outer edge of the scraper sleeve forms a full circumferential tight contact with the inner wall of the discharge pipe. During the downward movement, the inverted conical structure generates a progressive scraping action due to the gradual contraction of the pipe diameter. The flexible material (such as polyurethane rubber) can adapt to local deformation of the pipe wall and has wear resistance. The connection between the end with the smaller inner diameter and the piston rod achieves uniform stress transmission and prevents the scraper sleeve from twisting and falling off during high-speed movement.

[0025] (III) Further, the material box includes two half-frames with identical structures, symmetrically arranged on both sides of the bottom end of the discharge pipe to form the material box. A first arc segment is formed at the top of the half-frame near the discharge pipe, the radius of which matches the outer diameter of the discharge pipe. The two first arc segments enclose a first circular hole through which the discharge pipe passes. A second arc segment is formed at the bottom of the half-frame near the discharge pipe, the radius of which matches the outer diameter of the piston rod. The two second arc segments enclose a second circular hole through which the piston rod passes. For example, the half-frame has several connecting parts, and the material box includes fasteners. The two half-frames are symmetrically arranged on both sides of the bottom end of the discharge pipe, the connecting parts of the two half-frames are fitted together, and the fasteners pass through and lock the fitted connecting parts, thus fastening the two half-frames to form the material box. The two half-frames are fastened together with fasteners to achieve quick assembly and disassembly. The second round hole at the bottom allows the piston rod to move freely. The split-type material box can be quickly separated by simply loosening the fasteners on the connecting part during maintenance, without having to disassemble the discharge pipe or piston rod, thus improving the efficiency of material discharge. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the internal structure of an anti-clogging cyclone separator according to the present invention.

[0027] Figure 2 This is a top view of the anti-clogging cyclone separator of this utility model.

[0028] Figure 3 This is a top view of the material box in an anti-clogging cyclone separator according to the present invention.

[0029] Figure 4 This is a bottom view of the material box in an anti-clogging cyclone separator according to the present invention.

[0030] In the picture:

[0031] 100. Cylindrical section; 101. Inlet pipe; 102. Exhaust pipe; 103. Cylindrical section; 104. Support plate; 105. Inspection pipe; 106. Flange cover; 200. Inverted conical section; 201. Discharge pipe; 300. Anti-clogging component; 310. Piston rod; 320. Scraper sleeve; 330. Material box; 331. Half frame; 332. First arc section; 333. First circular hole; 334. Second arc section; 335. Second circular hole; 336. Connecting part; 337. Fastener; 338. Arc-shaped sealing gasket. Detailed Implementation

[0032] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0033] To make the objectives, technical solutions, and advantages of this utility model clearer, the device proposed by this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of this utility model will become clearer according to the following description. It should be noted that the accompanying drawings are in a very simplified form and use non-precise proportions, only used to conveniently and clearly assist in illustrating the purpose of the embodiments of this utility model. Please refer to the accompanying drawings to make the objectives, features, and advantages of this utility model more apparent and understandable. It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are only used to complement the content disclosed in the specification, for those skilled in the art to understand and read, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0034] Example:

[0035] A clog-resistant cyclone separator includes a cylindrical section 100, an inverted conical section 200, and an anti-clogging component 300.

[0036] Figure 1 This is a schematic diagram of the internal structure of an anti-clogging cyclone separator according to the present invention. Figure 2 This is a top view schematic diagram of an anti-clogging cyclone separator according to the present invention. Figures 1-2 As shown, an air inlet pipe 101 is provided on the outer side of the cylindrical section 100 along the tangential direction of the cylindrical section 100. The air inlet direction of the air inlet pipe 101 is perpendicular to the axial direction of the cylindrical section 100. An exhaust pipe 102 is provided at the top of the cylindrical section 100, and the bottom end of the exhaust pipe 102 extends into and connects to the cylindrical section 100. An inverted conical section 200 is connected to the bottom end of the cylindrical section 100 and connects to the cylindrical section 100. A discharge pipe 201 is provided at the bottom of the inverted conical section 200.

[0037] like Figure 1 As shown, the anti-clogging component 300 is located at the bottom end of the inverted conical section 200. The anti-clogging component 300 includes a piston rod 310, a scraper sleeve 320, and a material box 330. The bottom end of the piston rod 310 is coaxially located at the bottom end of the discharge pipe 201, and the top end of the piston rod 310 extends into the inverted conical section 200. The scraper sleeve 320 is coaxially located at the top end of the piston rod 310. The material box 330 is located at the bottom end of the discharge pipe 201 and is connected to the material box 330. When the piston rod 310 retracts, the scraper sleeve 320 retracts from the inverted conical section 200 to the bottom end of the discharge pipe 201, and the outer edge of the scraper sleeve 320 sweeps the residue on the inner wall of the discharge pipe 201 downwards into the material box 330.

[0038] like Figure 1As shown, the scraper sleeve 320 is further shaped as an inverted cone and is made of a flexible material. The outer diameter of the top end of the scraper sleeve 320 is larger than the inner diameter of the discharge pipe 201. For example, the scraper sleeve 320 is coaxially sleeved on the outer side of the top end of the piston rod 310. The end of the scraper sleeve 320 with a smaller inner diameter is connected to the outer side of the piston rod 310, and a portion of the top end of the piston rod 310 extends into the inner side of the scraper sleeve 320 and connects to the inner side of the scraper sleeve 320. The inverted cone-shaped flexible scraper sleeve 320, with its top outer diameter slightly larger than the inner diameter of the discharge pipe 201, generates radial expansion force through the elastic deformation of the flexible material when the piston rod 310 retracts. This ensures that the outer edge of the scraper sleeve 320 forms a tight circumferential contact with the inner wall of the discharge pipe 201. During the downward movement, the inverted cone structure generates a progressive scraping effect due to the gradual contraction of the pipe diameter. The flexible material (such as polyurethane rubber) can adapt to local deformation of the pipe wall and is wear-resistant. The end with the smaller inner diameter is connected to the piston rod 310 to achieve uniform stress transmission and prevent the scraper sleeve 320 from twisting and falling off during high-speed movement.

[0039] Figure 3 This is a top view of the material box in an anti-clogging cyclone separator according to the present invention. Figure 4 This is a bottom view of the material box in an anti-clogging cyclone separator according to this utility model. Figures 3-4 As shown, the material box 330 further includes two half-frames 331 with identical structures. The two half-frames 331 are symmetrically positioned on both sides of the bottom end of the discharge pipe 201 to form the material box 330. A first arc segment 332 is formed at the top of the half-frame 331 near the discharge pipe 201. The radius of the first arc segment 332 matches the outer diameter of the discharge pipe 201. The two first arc segments 332 enclose a first circular hole 333 through which the discharge pipe 201 passes. A second arc segment 334 is formed at the bottom of the half-frame 331 near the discharge pipe 201. The radius of the second arc segment 334 matches the outer diameter of the piston rod 310. The two second arc segments 334 enclose a second circular hole 335 through which the piston rod 310 passes. For example, the half-frame 331 is provided with several connecting parts 336, and the material box 330 includes fasteners 337. Two half-frames 331 are symmetrically arranged on both sides of the bottom end of the discharge pipe 201. The connecting parts 336 of the two half-frames 331 fit together, and the fasteners 337 pass through the fitting connecting parts 336 and lock them tightly. The two half-frames 331 are fastened together to form the material box 330. The two half-frames 331 are fastened together with the connecting parts 336 through the fasteners 337 to achieve quick assembly and disassembly. The second round hole 335 at the bottom allows the piston rod 310 to move freely. The split-type material box 330 can be quickly separated by loosening the fasteners 337 on the connecting parts 336 during maintenance, without disassembling the discharge pipe 201 or the piston rod 310, thus improving the efficiency of material discharge.

[0040] like Figures 3-4 As shown, furthermore, arc-shaped sealing gaskets 338 are provided on the surfaces of both the first arc segment 332 and the second arc segment 334. The arc-shaped sealing gaskets 338 are pressed against the outer wall of the discharge pipe 201 (first arc segment 332) and the surface of the piston rod (310) (second arc segment 334) by interference fit, forming a seal between the top and bottom of the material box 330. An axial compression seal is formed between the top arc-shaped sealing gasket 338 and the discharge pipe 201. The bottom arc-shaped sealing gasket 338 maintains the contact pressure through elastic deformation when the piston rod 310 reciprocates. The arc-shaped sealing gaskets 338 effectively prevent particle leakage between the top and bottom of the material box 330, improve the long-term sealing reliability of the material box 330, and improve the particle capture rate.

[0041] like Figure 1 As shown, further, a cylindrical section 103 is provided at the inner top of the cylindrical section 100. The cylindrical section 103 is coaxially located outside the exhaust pipe 102. Specifically, the height of the intake pipe 101 is higher than the height of the bottom of the cylindrical section 103. For example, a plurality of support plates 104 are also provided inside the cylindrical section 100. The plurality of support plates 104 are distributed at intervals along the circumference of the cylindrical section 100. The outer ends of the support plates 104 are connected to the inner wall of the cylindrical section 100, and the inner ends of the support plates 104 are connected to the outer wall of the cylindrical section 103. The cylindrical section 103 serves as a transition structure between the exhaust pipe 102 and the cylindrical section 100. The inner wall of the cylindrical section 103 forms a flow guide channel to guide the rising airflow upward and isolate the spiraling downward airflow on the outside. The gap design between the outer wall of the cylindrical section 103 and the inner wall of the cylindrical section 100 forces the airflow entering the cylindrical section 100 from the intake pipe 101 to descend along a spiral trajectory between the outer wall of the cylindrical section 103 and the inner wall of the cylindrical section 100 to the inverted cone section 200 for full separation, thereby improving the separation efficiency of the cyclone separator.

[0042] like Figures 1-2 As shown, furthermore, an inspection tube 105 is provided on the outer side of the cylindrical section 100 in a direction perpendicular to the axis of the cylindrical section 100. The inspection tube 105 is connected to the cylindrical section 100, and a matching flange cover 106 is provided at the outer end of the inspection tube 105. By opening the flange cover 106 at the pipe opening, the inspection tube 105 can provide an endoscope channel to monitor the condition of the inner wall of the cylinder in real time, and internal maintenance can be completed without stopping the machine.

[0043] In operation, this embodiment is as follows:

[0044] Gas containing particles enters the cylindrical section 100 through the inlet pipe 101. The gas flows along the inner wall of the cylindrical section 100 and is guided to form a rotating vortex. It then flows downward in a spiral shape along the cylindrical section 100 toward the inverted conical section 200. Inside the inverted conical section 200, the spiral surface of the downward spiral of the airflow contracts sharply, and the gas spiral speed is relatively fast. Under the action of centrifugal force, the particles are thrown toward the inner wall of the inverted conical section 200. The particles lose inertia and fall along the wall to the discharge pipe 201 and enter the material box 330. The gas after gas-solid separation flows toward the center continuously during its descent in the inverted conical section 200, forming a centripetal radial airflow. A pressure difference is generated between the exhaust pipe 102 and the inside of the separator, causing the radial airflow in the center to spiral upward and enter the exhaust pipe 102 and be discharged.

[0045] When the discharge pipe 201 is blocked by accumulated particles, the piston rod 310 is driven to retract. The rod of the piston rod 310 drives the scraper sleeve 320 to move downward. The scraper sleeve 320 enters the discharge pipe 201 and pushes the blocked particles downward. The outer edge of the larger outer diameter end of the scraper sleeve 320 moves downward along the inner wall of the discharge pipe 201 and scrapes off the particles attached to the inner wall of the discharge pipe 201. The particles are scraped down into the material box 330. The fastener 337 of the material box 330 is loosened, and the two half-frames 331 are opened to pour out the particles collected in the two half-frames 331.

[0046] In this embodiment, the piston rod 310 drives the scraper sleeve 320 to automatically scrape along the inner wall of the discharge pipe 201, effectively breaking up blockages and collecting residual particles, maintaining separation efficiency during continuous operation, reducing downtime maintenance needs, and improving the working efficiency of the cyclone separator.

[0047] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0048] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A cyclone separator designed to prevent clogging, characterized in that, include: A cylindrical section (100) is provided with an air inlet pipe (101) on its outer side along the tangential direction of the cylindrical section (100). The air inlet direction of the air inlet pipe (101) is perpendicular to the axial direction of the cylindrical section (100). An exhaust pipe (102) is provided at the top of the cylindrical section (100). The bottom end of the exhaust pipe (102) extends into the cylindrical section (100) and connects to the cylindrical section (100). An inverted conical section (200) is connected to the bottom end of the cylindrical section (100) and communicates with the cylindrical section (100). A discharge pipe (201) is provided at the bottom of the inverted conical section (200). An anti-blocking component (300) is disposed at the bottom end of the inverted cone section (200), and the anti-blocking component (300) includes: Piston rod (310), the bottom end of which is coaxially disposed at the bottom end of the discharge pipe (201), and the top end of which extends into the inverted cone section (200). Scraper sleeve (320), the scraper sleeve (320) is coaxially disposed at the top end of the piston rod (310); Material box (330), the material box (330) is located at the bottom end of the discharge pipe (201) and is connected to the material box (330). The piston rod (310) is driven to retract, and the scraper sleeve (320) retracts from the inverted cone section (200) to the bottom end of the discharge pipe (201). The outer edge of the scraper sleeve (320) sweeps the residue on the inner wall of the discharge pipe (201) downwards into the material box (330).

2. The anti-clogging cyclone separator according to claim 1, characterized in that: The scraper sleeve (320) is inverted conical in shape and is made of flexible material. The outer diameter of the top end of the scraper sleeve (320) is larger than the inner diameter of the discharge pipe (201).

3. The anti-clogging cyclone separator according to claim 2, characterized in that: The scraper sleeve (320) is coaxially sleeved on the outer side of the top end of the piston rod (310). The end of the scraper sleeve (320) with the smaller inner diameter is connected to the outer side of the piston rod (310). The top part of the piston rod (310) extends into the inner side of the scraper sleeve (320) and is connected to the inner side of the scraper sleeve (320).

4. The anti-clogging cyclone separator according to claim 1, characterized in that: The material box (330) includes two half-frames (331), which have the same structure. The two half-frames (331) are symmetrically arranged on both sides of the bottom end of the discharge pipe (201) to form the material box (330). The top of the half-frame (331) near the discharge pipe (201) has a first arc segment (332). The radius of the first arc segment (332) matches the outer diameter of the discharge pipe (201). The segment (332) encloses to form a first circular hole (333), and the discharge pipe (201) passes through the first circular hole (333); the bottom end of the half frame (331) near the discharge pipe (201) is provided with a second circular arc segment (334), the radius of the second circular arc segment (334) matches the outer diameter of the piston rod (310), and the two second circular arc segments (334) enclose to form a second circular hole (335), and the piston rod (310) passes through the second circular hole (335).

5. The anti-clogging cyclone separator according to claim 4, characterized in that: The half-frame (331) is provided with a plurality of connecting parts (336), and the material box (330) includes fasteners (337). The two half-frames (331) are symmetrically arranged on both sides of the bottom end of the discharge pipe (201). The connecting parts (336) of the two half-frames (331) are fitted together. The fasteners (337) pass through the fitted connecting parts (336) and are locked. The two half-frames (331) are fastened together to form the material box (330).

6. The anti-clogging cyclone separator according to claim 4, characterized in that: Both the first arc segment (332) and the second arc segment (334) are provided with arc-shaped sealing gaskets (338).

7. The anti-clogging cyclone separator according to claim 1, characterized in that: The inner top of the cylindrical section (100) is also provided with a cylindrical section (103), which is coaxially located on the outside of the exhaust pipe (102).

8. The anti-clogging cyclone separator according to claim 7, characterized in that: The cylindrical section (100) is further provided with a plurality of support plates (104), which are distributed at intervals along the circumference of the cylindrical section (100). The outer end of the support plate (104) is connected to the inner wall of the cylindrical section (100), and the inner end of the support plate (104) is connected to the outer wall of the cylindrical section (103).

9. The anti-clogging cyclone separator according to claim 1, characterized in that: An inspection tube (105) is provided on the outer side of the cylindrical section (100) in a direction perpendicular to the axis of the cylindrical section (100). The inspection tube (105) is connected to the cylindrical section (100), and a matching flange cover (106) is provided at the outer end of the inspection tube (105).

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