Low-resistance efficient demister

Abstract

The utility model discloses a low-resistance efficient demister, which relates to the technical field of demisters and comprises a demisting cylinder and a demisting mechanism. The demisting cylinder comprises an upper shell, a middle shell and a lower shell; the demisting mechanism comprises a demisting assembly and a fixing assembly; the demisting assembly comprises an air inlet structure, a demisting structure and an exhaust structure; the fixing assembly comprises a fixing seat, a fixing piece, a fixing rod, a connecting piece, a sealing piece and a sealing seat, the demisting barrel and the demisting mechanism are arranged, the fixing seat, the fixing piece, the fixing rod, the connecting piece, the sealing piece and the sealing seat are used for dismounting and fixing the demisting barrel, and people can replace parts of the demisting barrel conveniently; according to the demister provided by the invention, the demisting component is quickly cleaned and maintained by matching with the limiting piece, the limiting strip, the limiting rod and the supporting frame, the maintenance efficiency of the demister is improved, and the resistance of gas passing through the demisting cylinder is reduced and the demisting effect of the demister is improved by arranging the gas inlet structure, the demisting structure and the exhaust structure.

Description

Technical Field

[0001] The utility model belongs to the technical field of demisters, in particular to a low-resistance and high-efficiency demister. Background Art

[0002] A mist eliminator is a device widely used in industrial production and environmental protection. It is primarily used to remove mist or liquid droplets from gases or liquids. Its operating principles are based on two physical phenomena: condensation and adsorption. When a gas or liquid containing water vapor flows through the demister, the temperature drops, and the water vapor condenses into small water droplets or ice crystals. These droplets or ice crystals, under the influence of gravity, flow down the inner wall of the demister, separating from the gas or liquid. The interior of the demister is typically filled with adsorbent materials such as activated carbon and silica gel. These materials have adsorption capacity and can absorb odors and harmful substances from the gas or liquid passing through the demister.

[0003] The existing demisters have certain disadvantages when used. The existing demisters are usually composed of a demister cylinder and a demister mechanism inside the demister cylinder. The demister cylinder is usually a long-cylinder integral structure. After the demister has been used for a period of time, the demister mechanism needs to be cleaned and maintained. The demister cylinder with a long-cylinder integral structure is not convenient for people to clean and maintain the demister mechanism. In addition, the existing demister has a complex structure and a large resistance when the gas passes through, which affects the flow performance of the gas, cannot effectively remove droplets, affects the cleanliness of the gas, and cannot meet people's needs. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art; to this end, the utility model proposes a low-resistance and high-efficiency demister.

[0005] A low-resistance and high-efficiency demister, comprising: a demister cylinder and a demister mechanism arranged inside the demister cylinder; wherein the demister cylinder comprises an upper shell, a middle shell detachably connected to the upper shell and a lower shell detachably fixed to the middle shell, and the upper shell, the middle shell and the lower shell can be assembled into a demister cylinder; the demister mechanism comprises a demister assembly arranged on the inner side of the demister cylinder and a fixing assembly detachably fixed to the upper shell, the middle shell and the lower shell; the demister assembly comprises an air intake structure arranged inside the lower shell, a demister structure arranged inside the demister cylinder and an exhaust structure arranged inside the upper shell, the air intake structure can facilitate the entry of gas, the demister structure can process fog droplets in the gas, and the exhaust structure can facilitate the discharge of gas from the demister cylinder; the fixing assembly comprises a demister assembly respectively installed There are fixing seats on the outer wall of the upper shell and the outer wall of the middle shell and fixing parts respectively installed on the outer wall of the middle shell and the outer wall of the lower shell; several groups of fixing rods are installed on the fixing seats to fix the fixing parts, and the fixing seats, fixing parts and fixing rods can assemble and fix the upper shell, the middle shell and the lower shell; the fixing assembly also includes connecting parts respectively installed on the upper end of the middle shell and the upper end of the lower shell, sealing parts provided on the inner wall of the upper shell and the inner wall of the middle shell, and sealing seats on the inner wall of the middle shell and the inner wall of the lower shell, and the sealing and sealing seats can improve the sealing performance of the connection between the upper shell, the middle shell and the lower shell; the lower end of the upper shell, the middle shell and the lower end of the middle shell are both provided with connecting grooves connected to the connecting parts, and the connecting parts can improve the connection stability between the upper shell, the middle shell and the lower shell.

[0006] As a further solution of the present invention: the cross-section of the fixing seat is annular, the bottom end of the fixing seat is provided with a fixing groove connected to the fixing piece, the inner top surface of the fixing groove is vertically installed with a fixing ring connected to the fixing piece, the upper end surface of the fixing piece is provided with a plug-in groove connected to the fixing ring, the fixing piece and the fixing ring are both provided with fixing holes connected to the fixing rod in a circular array, and the fixing seat can improve the connection firmness between the upper shell, the middle shell and the lower shell through the fixing rod, the fixing piece and the fixing ring.

[0007] As a further solution of the present invention: the sealing member includes a reinforcement member fitted with the sealing seat and a sealing strip vertically installed at the lower end of the reinforcement member, the sealing seat is provided with a sealing groove connected to the sealing strip, and the sealing strip and the sealing groove are sealed.

[0008] As a further solution of the present invention: the sealing seat and the sealing member are both in annular structures, the upper end face of the middle shell, the upper end face of the sealing seat and the upper end face of the fixing member are all staggered to improve the sealing performance, the connecting member is in an annular structure, and the connecting groove is in fit with the connecting member.

[0009] As a further solution of the present invention: the air intake structure includes an air intake support frame installed on the inner bottom surface of the lower shell and an air intake cyclone component rotatably set on the air intake support frame. The air intake cyclone component is an impeller structure, which ensures the smooth passage of gas.

[0010] As a further solution of the present invention: the exhaust structure includes an exhaust seat movably installed inside the upper shell and an exhaust part installed on the inner side of the exhaust seat. The exhaust seat is a circular ring structure. The outer wall of the exhaust seat is equipped with a rotating part rotatably connected to the upper shell. The exhaust seat, exhaust part and rotating part cooperate to discharge the gas in the demister cylinder and improve the flow performance of the gas.

[0011] As a further solution of the present invention: the demisting structure includes an adsorption guide seat respectively installed on the inner side of the upper shell and the inner side of the lower shell and an adsorption guide piece detachably arranged on the inner side of the adsorption guide seat, the vertical cross-section of the adsorption guide piece is a ridge structure, and a plurality of through holes are provided on the adsorption guide piece. The adsorption guide piece can further reduce the airflow resistance, and when used in conjunction with the through holes, the gas generates vortexes when passing through the adsorption guide piece, thereby increasing the collision probability of droplets and improving the demisting efficiency. The outer wall of the adsorption guide piece is provided with a limiting piece that fits with the adsorption guide seat, and the outer wall of the limiting piece is provided with a limiting strip connected to the adsorption guide seat in a circular array, and the adsorption guide seat is provided with a limiting rod for fixing the limiting strip, and the adsorption guide seat is provided with a limiting groove connected to the limiting strip, and the limiting strip is provided with a limiting hole connected to the limiting rod.

[0012] As a further solution of the present invention: the demisting structure also includes a support frame that can be detachably mounted on the inner side of the middle shell and a swirl seat that can be detachably mounted on the inner side of the support frame, the bottom end of the swirl seat is rotatably provided with a demisting swirl component, the upper end of the swirl seat is provided with a mounting rod for fixing the demisting swirl component, the demisting swirl component is composed of a rotating shaft, a rotor and demisting blades, and the rotating shaft is rotatably provided on the swirl seat.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] (1) The utility model can disassemble and fix the upper shell, the middle shell and the lower shell by setting the defogger and the defogger mechanism, the fixing seat, the fixing part, the fixing rod, the connecting part, the sealing part and the sealing seat, so that people can replace the parts of the defogger and reduce their economic losses. When used in conjunction with the limiting parts, the limiting strips, the limiting rods and the supporting frame, the defogger components can be quickly cleaned and maintained, thereby improving the maintenance efficiency of the defogger. The air intake structure, the defogger structure and the exhaust structure set can reduce the resistance of the gas passing through the defogger and improve the defogger effect of the defogger. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the demister in the utility model;

[0016] Figure 2 It is a partial structural diagram of the demister cylinder and demister mechanism in the utility model;

[0017] Figure 3 For this utility model Figure 2 Enlarged view of point A in the middle;

[0018] Figure 4 It is a partial structural diagram of the fixing component in the utility model;

[0019] Figure 5 It is a partial structural diagram of the demisting structure in the utility model;

[0020] Figure 6 It is a partial structural diagram of the exhaust structure in this utility model.

[0021] In the figure: 1. demister; 2. upper shell; 3. middle shell; 4. lower shell; 5. air intake structure; 6. demister structure; 7. exhaust structure; 8. fixing seat; 9. fixing part; 10. fixing rod; 11. connecting part; 12. sealing part; 13. sealing seat; 14. fixing ring; 15. reinforcement part; 16. sealing strip; 17. air intake support frame; 18. air intake cyclone part; 19. exhaust seat; 20. exhaust part; 21. rotating part; 22. demister cyclone part; 23. adsorption guide seat; 24. adsorption guide member; 25. limiting part; 26. limiting strip; 27. limiting rod; 28. support frame; 29. ​​cyclone seat. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] Example 1

[0024] See also Figure 1 - Figure 4The present application provides a low-resistance and high-efficiency demister, comprising a demister cylinder 1 and a demister mechanism arranged inside the demister cylinder 1; wherein the demister cylinder 1 comprises an upper shell 2, a middle shell 3 detachably connected to the upper shell 2, and a lower shell 4 detachably fixed to the middle shell 3, and the upper shell 2, the middle shell 3 and the lower shell 4 can be assembled into the demister cylinder 1; the demister mechanism comprises a fixing assembly detachably fixing the upper shell 2, the middle shell 3 and the lower shell 4; the fixing assembly comprises a fixing seat 8 respectively mounted on the outer wall of the upper shell 2 and the outer wall of the middle shell 3, and a fixing piece 9 respectively mounted on the outer wall of the middle shell 3 and the outer wall of the lower shell 4; a plurality of fixing rods 10 for fixing the fixing piece 9 are mounted on the fixing seat 8. The fixing seat 8, the fixing part 9 and the fixing rod 10 can assemble and fix the upper shell 2, the middle shell 3 and the lower shell 4; the fixing assembly also includes a connecting part 11 respectively installed on the upper end of the middle shell 3 and the upper end of the lower shell 4, a sealing part 12 provided on the inner wall of the upper shell 2 and the inner wall of the middle shell 3, and a sealing seat 13 provided on the inner wall of the middle shell 3 and the inner wall of the lower shell 4. The sealing part 12 and the sealing seat 13 can improve the sealing performance of the connection between the upper shell 2, the middle shell 3 and the lower shell 4; the lower end of the upper shell 2, the middle shell 3 and the lower end of the middle shell 3 are all provided with a connecting groove connected to the connecting part 11. The connecting part 11 can improve the connection stability between the upper shell 2, the middle shell 3 and the lower shell 4.

[0025] As an embodiment of the present utility model, when one of the upper shell 2, the middle shell 3 and the lower shell 4 is damaged or the demister 1 needs to be disassembled and maintained, the fixing rod 10 is removed from the fixing seat 8, the upper shell 2, the middle shell 3 and the lower shell 4 are moved, the fixing part 9 and the fixing seat 8 are disassembled and separated, the sealing seat 13 and the sealing part 12 are disassembled and separated, and the connecting part 11 is disassembled and separated, so as to disassemble and maintain the upper shell 2, the middle shell 3 and the lower shell 4.

[0026] In this embodiment, the cross-section of the fixing seat 8 is annular in structure, and the bottom end of the fixing seat 8 is provided with a fixing groove connected to the fixing member 9, and a fixing ring 14 connected to the fixing member 9 is vertically installed on the inner top surface of the fixing groove. The upper end surface of the fixing member 9 is provided with a plug-in groove connected to the fixing ring 14, and the fixing member 9 and the fixing ring 14 are both provided with fixing holes connected to the fixing rod 10 in a circular array. The fixing seat 8 can improve the connection firmness between the upper shell 2, the middle shell 3 and the lower shell 4 through the fixing rod 10, the fixing member 9 and the fixing ring 14.

[0027] As an embodiment of the present invention, Figure 2 - Figure 4 As shown, the fixing rod 10 is removed from the fixing hole, the fixing member 9 is removed from the fixing groove, and the fixing ring 14 is removed from the plug-in groove.

[0028] In this embodiment, the seal 12 includes a reinforcement 15 that is in contact with the sealing seat 13 and a sealing strip 16 vertically installed at the lower end of the reinforcement 15. A sealing groove connected to the sealing strip 16 is provided on the sealing seat 13, and the sealing strip 16 is sealed to the sealing groove.

[0029] In this embodiment, the sealing seat 13 and the sealing member 12 are both annular structures. The upper end surface of the middle shell 3, the upper end surface of the sealing seat 13 and the upper end surface of the fixing member 9 are all staggered to improve the sealing performance. The connecting member 11 is annular structure, and the connecting groove fits the connecting member 11.

[0030] As an embodiment of the present invention, Figure 3 and Figure 4 As shown, the sealing strip 16 is removed from the sealing groove, the reinforcement 15 is separated from the sealing seat 13, and the sealing seat 13 and the sealing member 12 are removed and separated.

[0031] In summary, when disassembling and maintaining the demister 1, remove the fixing rod 10 from the fixing hole, remove the fixing part 9 from the fixing groove, remove the fixing ring 14 from the plug-in groove, remove the sealing strip 16 from the sealing groove, separate the reinforcement 15 from the sealing seat 13, disassemble and separate the sealing seat 13 and the sealing part 12, and remove the connecting part 11 from the connecting groove, so as to disassemble and fix the upper shell 2, the middle shell 3 and the lower shell 4, and replace the parts of the demister 1.

[0032] Example 2

[0033] Reference Figure 2 、 Figure 5 and Figure 6 , which is the second embodiment of the present utility model, is for defogging the gas entering the demister 1, wherein the defogger mechanism includes a defogger assembly arranged on the inner side of the demister 1; the defogger assembly includes an air intake structure 5 arranged inside the lower shell 4, a defogger structure 6 arranged inside the demister 1 and an exhaust structure 7 arranged inside the upper shell 2, the air intake structure 5 can facilitate the entry of gas, the defogger structure 6 can process the fog droplets in the gas, and the exhaust structure 7 can facilitate the discharge of gas from the demister 1.

[0034] As an embodiment of the present invention, when the gas enters the demister 1 through the air intake structure 5, the demister structure 6 can remove the mist droplets in the gas, and the exhaust structure 7 removes the gas after demisting.

[0035] In this embodiment, the air intake structure 5 includes an air intake support frame 17 installed on the inner bottom surface of the lower shell 4 and an air intake cyclone member 18 rotatably arranged on the air intake support frame 17. The air intake cyclone member 18 is an impeller structure to ensure smooth passage of gas.

[0036] As an embodiment of the present invention, Figure 2 As shown, when the gas enters the lower shell 4 , the air inlet cyclone member 18 rotates on the air inlet support frame 17 , thereby throwing the mist droplets in the gas toward the demisting structure 6 .

[0037] In this embodiment, the exhaust structure 7 includes an exhaust seat 19 movably installed inside the upper shell 2 and an exhaust part 20 installed on the inner side of the exhaust seat 19. The exhaust seat 19 is a circular ring structure. The outer wall of the exhaust seat 19 is equipped with a rotating part 21 rotatably connected to the upper shell 2. The upper shell 2 is provided with a rotating groove matching the rotating part 21. The exhaust seat 19, the exhaust part 20 and the rotating part 21 cooperate to discharge the gas in the demister 1 and improve the flow performance of the gas.

[0038] As an embodiment of the present invention, Figure 6 As shown, when the gas enters the upper shell 2 from the middle shell 3, the gas passes through the exhaust member 20, thereby driving the exhaust seat 19 to rotate, and the exhaust seat 19 drives the rotating member 21 to rotate, so that the gas is discharged from the upper shell 2 faster.

[0039] In this embodiment, the demisting structure 6 includes an adsorption guide seat 23 respectively installed on the inner side of the upper shell 2 and the inner side of the lower shell 4, and an adsorption guide member 24 detachably arranged on the inner side of the adsorption guide seat 23. The vertical cross-section of the adsorption guide member 24 is a ridge structure, and a plurality of through holes are provided on the adsorption guide member 24. The adsorption guide member 24 can further reduce the airflow resistance, and when used in conjunction with the through holes, the gas generates vortexes when passing through the adsorption guide member 24, thereby increasing the collision probability of droplets and improving the demisting efficiency. The outer wall of the adsorption guide member 24 is provided with a limiting member 25 that is in contact with the adsorption guide seat 23. The outer wall of the limiting member 25 is provided with a limiting bar 26 connected to the adsorption guide seat 23 in a circular array. The adsorption guide seat 23 is provided with a limiting rod 27 for fixing the limiting bar 26. The adsorption guide seat 23 is provided with a limiting groove connected to the limiting bar 26, and the limiting bar 26 is provided with a limiting hole connected to the limiting rod 27.

[0040] In this embodiment, the demisting structure 6 also includes a support frame 28 that can be detachably mounted on the inner side of the middle shell 3 and a swirl seat 29 that can be detachably mounted on the inner side of the support frame 28. The bottom end of the swirl seat 29 is rotatably provided with a demisting swirl component 22, and the upper end of the support frame 28 is provided with a mounting rod for fixing the swirl seat 29. The demisting swirl component 22 is composed of a rotating shaft, a rotor and demisting blades, and the rotating shaft is rotatably provided on the swirl seat 29.

[0041] As an embodiment of the present invention, Figure 2 and Figure 5As shown, the gas passes through the exhaust structure 7 and throws the mist droplets toward the adsorption guide 24 above, so that the adsorption guide 24 increases the collision probability of the mist droplets and improves the demisting efficiency. The gas passes through the adsorption guide seat 23, so that the demisting cyclone 22 rotates on the cyclone seat 29, thereby throwing the remaining mist droplets in the gas toward the adsorption guide 24 above, improving the demisting effect.

[0042] Disassemble and separate the upper shell 2, the middle shell 3 and the lower shell 4, remove the limit rod 27 from the limit hole, remove the limit bar 26 from the limit groove, remove the adsorption guide 24 and the limit member 25 from the adsorption guide seat 23, clean and maintain the adsorption guide 24, remove the swirl seat 29 from the support frame 28, clean and maintain the defogger swirl member 22, and then clean and maintain the intake swirl member 18 and the exhaust member 20 respectively.

[0043] In summary, by disassembling and separating the upper shell 2, the middle shell 3 and the lower shell 4, the defogger assembly can be cleaned and maintained. When the upper shell 2, the middle shell 3 and the lower shell 4 are assembled, the defogger assembly can clean and remove the fog and water droplets entering the defogger cylinder 1.

[0044] Example 3

[0045] Reference Figure 1 - Figure 6 , combining Example 1 and Example 2 to obtain this embodiment.

[0046] The above fixing components can be used to disassemble and fix the upper shell 2, the middle shell 3 and the lower shell 4, which is convenient for replacing the upper shell 2, the middle shell 3 or the lower shell 4, thereby reducing people's economic losses, or the upper shell 2, the middle shell 3 and the lower shell 4 can be disassembled to facilitate cleaning and maintenance of the defogger assembly, facilitate the production, transportation, disassembly and maintenance of the defogger, and improve the cleaning effect of the defogger assembly. The defogger assembly can be set up to remove the fog and water droplets entering the defogger cylinder 1, and the air intake structure 5, the exhaust structure 7 and the defogger swirl component 22 can reduce the resistance of the gas running in the defogger cylinder 1.

[0047] The above embodiments are only used to illustrate the technical method of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical method of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the present invention.

Claims

1. A low-resistance and high-efficiency demister, characterized in that: include: A demister cylinder (1) and a demister mechanism arranged inside the demister cylinder (1); The demister (1) comprises an upper shell (2), a middle shell (3) detachably connected to the upper shell (2), and a lower shell (4) detachably fixed to the middle shell (3); The demisting mechanism comprises a fixing assembly for detachably fixing the upper shell (2), the middle shell (3) and the lower shell (4); The fixing assembly comprises a fixing seat (8) respectively mounted on the outer wall of the upper shell (2) and the outer wall of the middle shell (3), a fixing piece (9) respectively mounted on the outer wall of the middle shell (3) and the outer wall of the lower shell (4), and a fixing rod (10) mounted on the fixing seat (8) and fixing the fixing piece (9).

2. A low-resistance and high-efficiency demister according to claim 1, characterized in that: The fixing assembly further comprises a connecting member (11) respectively mounted on the upper end of the middle shell (3) and the upper end of the lower shell (4), a sealing member (12) arranged on the inner wall of the upper shell (2) and the inner wall of the middle shell (3), and a sealing seat (13) on the inner wall of the middle shell (3) and the inner wall of the lower shell (4).

3. A low-resistance and high-efficiency demister according to claim 2, characterized in that: The lower end of the middle shell (3) and the lower end of the middle shell (3) are both provided with a connecting groove connected to the connecting piece (11); the cross section of the fixing seat (8) is annular; the bottom end of the fixing seat (8) is provided with a fixing groove connected to the fixing piece (9); a fixing ring (14) connected to the fixing piece (9) is vertically mounted on the inner top surface of the fixing groove; the upper end surface of the fixing piece (9) is provided with a plug-in groove connected to the fixing ring (14); and the fixing piece (9) and the fixing ring (14) are both provided with fixing holes connected to the fixing rod (10) in a circular array.

4. A low-resistance and high-efficiency demister according to claim 3, characterized in that: The sealing member (12) comprises a reinforcing member (15) fitted with the sealing seat (13) and a sealing strip (16) vertically mounted on the lower end of the reinforcing member (15); a sealing groove connected to the sealing strip (16) is provided on the sealing seat (13); the sealing seat (13) and the sealing member (12) are both annular structures; the upper end surface of the middle shell (3), the upper end surface of the sealing seat (13) and the upper end surface of the fixing member (9) are all staggered; the connecting member (11) is annular structure; the connecting groove is fitted with the connecting member (11).

5. The low-resistance and high-efficiency demister according to claim 1, characterized in that: The demisting mechanism also includes a demisting assembly arranged inside the demisting cylinder (1), the demisting assembly includes an air intake structure (5) arranged inside the lower shell (4), a demisting structure (6) arranged inside the demisting cylinder (1), and an exhaust structure (7) arranged inside the upper shell (2), the air intake structure (5) includes an air intake support frame (17) installed on the inner bottom surface of the lower shell (4) and an air intake cyclone member (18) rotatably arranged on the air intake support frame (17).

6. The low-resistance and high-efficiency demister according to claim 5, characterized in that: The exhaust structure (7) comprises an exhaust seat (19) movably mounted inside the upper shell (2) and an exhaust member (20) mounted inside the exhaust seat (19); the exhaust seat (19) is a circular ring structure; and a rotating member (21) rotatably connected to the upper shell (2) is mounted on the outer wall of the exhaust seat (19).

7. The low-resistance and high-efficiency demister according to claim 6, characterized in that: The demisting structure (6) comprises an adsorption guide seat (23) respectively mounted on the inner side of the upper shell (2) and the inner side of the lower shell (4) and an adsorption guide member (24) detachably arranged on the inner side of the adsorption guide seat (23); the vertical cross-section of the adsorption guide member (24) is a ridge structure; the adsorption guide member (24) is provided with a plurality of groups of through holes; the outer wall of the adsorption guide member (24) is provided with a limiting member (25) fitted with the adsorption guide seat (23); the outer wall of the limiting member (25) is provided with a limiting strip (26) connected to the adsorption guide seat (23) in a circular array; the adsorption guide seat (23) is provided with a limiting rod (27) for fixing the limiting strip (26).

8. The low-resistance and high-efficiency demister according to claim 7, characterized in that: The demisting structure (6) further comprises a support frame (28) detachably mounted on the inner side of the middle shell (3) and a swirl seat (29) detachably mounted on the inner side of the support frame (28); a demisting swirl member (22) is rotatably provided at the bottom end of the swirl seat (29).

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