A heat exchanger with self-cleaning function

Abstract

The present invention relates to the field of cleaning facilities, and in particular to a heat exchanger with a self-cleaning function, comprising a tower shell and a filter screen bucket installed at the inner upper end of the tower shell, a driving and rotating pusher is arranged in the middle of the upper end of the tower shell, and L-shaped frames are slidably installed at both ends of the driving and rotating pusher, and the two L-shaped frames are symmetrically arranged, one of the L-shaped frames is higher than the other L-shaped frame, and the lower ends of the two L-shaped frames are connected to magnetic bars, and the magnetic bar on the other L-shaped frame is located inside the filter screen bucket, and an elastic pusher is installed at the upper end of the L-shaped frame, and a shovel ring is connected to the end of the elastic pusher, and the shovel ring is attached to the outer surface of the magnetic bar, and a protruding cap is fixedly installed at one end of the magnetic bar. The present invention reduces the labor intensity of workers and improves the convenience of cleaning, while ensuring the good adsorption of the magnetic bar, and can continuously clean, ensuring the cleaning effect.

Description

Technical Field

[0001] The invention relates to the field of cleaning facilities, and in particular to a heat exchanger with a self-cleaning function. Background Art

[0002] A heat exchanger is a device that transfers part of the heat of a hot fluid to a cold fluid. It is also called a heat exchanger. Heat exchangers play an important role in chemical, petroleum, power, food and many other industrial productions. In chemical production, heat exchangers can be used as heaters, coolers, condensers, evaporators and reboilers, etc., and are widely used.

[0003] Among them, heat exchangers are divided into partition heat exchangers, heat storage heat exchangers, fluid-connected indirect heat exchangers, direct contact heat exchangers and compound heat exchangers. Among them, direct contact heat exchangers are also called mixed heat exchangers. This type of heat exchanger is a device in which two fluids are in direct contact and mixed with each other for heat exchange, such as cooling towers.

[0004] However, when the cooling tower is performing heat exchange cooling on the metal cutting fluid, the iron filings contained in the cutting fluid will clog the filter in the cooling tower. Therefore, in order to avoid the filter being clogged and affecting its use, workers generally clean the iron filings on the filter regularly. The cleaning process greatly increases the labor intensity of the workers and is quite inconvenient. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the background technology and to propose a heat exchanger with a self-cleaning function.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is: a heat exchanger with a self-cleaning function, comprising a tower shell and a filter bucket installed at the upper end of the tower shell, a driving and rotating pusher is arranged in the middle of the upper end of the tower shell, and L-shaped frames are slidably installed at both ends of the driving and rotating pusher, and the two L-shaped frames are symmetrically arranged, one of the L-shaped frames is higher than the other L-shaped frame, and the lower ends of the two L-shaped frames are connected to magnetic bars, and the magnetic bar on the other L-shaped frame is located inside the filter bucket, an elastic pusher is installed at the upper end of the L-shaped frame, and a shovel ring is connected to the end of the elastic pusher, and the shovel ring is fitted to the outer surface of the magnetic bar, and a protruding cap is fixedly installed at one end of the magnetic bar.

[0007] Preferably, a fixing cap is fixedly installed on the other end of the magnetic rod, the upper end of the fixing cap is fixed to the L-shaped frame, the outer surface of the extending cap is coplanar with the outer surface of the magnetic rod, and the elastic push piece includes a guide rod installed on the upper end of the L-shaped frame, the outer surface of the guide rod is fitted with an extending frame, a pushing frame is fixedly installed on the front end of the extending frame, and the end of the pushing frame is fixed to the upper end of the shovel ring.

[0008] Preferably, a fixing ear is fixedly installed at one end of the guide rod, the lower end of the fixing ear is fixed to the upper end of the L-shaped frame, the other end of the guide rod is coaxially fixed with a limiting cap, a spring body is wrapped around the outer side of the guide rod, one end of the spring body is fixed to the extension frame, the other end of the spring body is fixed to the limiting cap, a wheel axle is fixedly installed at the upper end edge of the extension frame, and a guide wheel is coaxially installed on the outer surface of the wheel axle.

[0009] Preferably, the driving member includes a load-bearing shaft coaxially arranged directly above the tower shell, the lower end of the load-bearing shaft is coaxially fixedly installed with a fixing sleeve, the interior of the fixing sleeve is penetrated and inlaid with a rotating frame, both ends of the rotating frame are fixedly installed with a guide frame, the upper end of the L-shaped frame is slidably installed on the outer surface of the guide frame, and the lower end of the guide frame is fixedly installed with an anti-drop cap.

[0010] Preferably, the front end of the fixed sleeve is connected to a gear, one side of the gear is meshed with a No. 2 tooth plate, and the other side of the gear is meshed with a No. 1 tooth plate, the height of the No. 2 tooth plate is lower than that of the No. 1 tooth plate, and connecting frames are fixedly installed at the lower edges of the side surfaces of the No. 2 tooth plate and the No. 1 tooth plate, the connecting frame on the No. 2 tooth plate is fixed to another L-shaped frame, and the connecting frame on the No. 1 tooth plate is fixed to one of the L-shaped frames.

[0011] Preferably, a collecting bucket is fixedly installed at the upper edge of the tower shell, a fixing frame is fixedly installed on the side of the collecting bucket, a servo motor is connected to the end of the fixing frame, the output end of the servo motor is fixed to the upper end of the load-bearing shaft, a servo push cylinder is connected to the front end of the rotating frame, and the output end of the servo push cylinder is fixed to the connecting frame on the No. 2 gear plate.

[0012] Preferably, a connecting shaft is coaxially mounted inside the gear, the end of the connecting shaft is fixed to a fixed sleeve, a cylinder frame is fixedly mounted on the rear end of the servo push cylinder, the cylinder frame is embedded in the outer surface of the rotating frame, a battery is fixedly mounted on the upper end of the cylinder frame, a motor frame is fixedly mounted on the front end of the servo motor, and the end of the motor frame is fixed to the fixed frame.

[0013] Preferably, a fixing column is embedded through the end of the fixing frame, a fixing block is fixedly installed on the end of the fixing column, a V-shaped frame is embedded on the end of the fixing block, the V-shaped frame is located on the upper side of the collecting bucket, and a plurality of mounting ears are fixedly installed in a circular array at the lower edge of the outer surface of the tower shell.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The rotating bearing shaft can drive the rotating frame to rotate, and then drive the guide frame on the rotating frame to rotate, thereby driving the magnetic bar on the L-shaped frame to rotate in a circle, so that it can move in the filter bucket, and use the magnetism of the magnetic bar to absorb the iron filings filtered out by the filter bucket to avoid the iron filings clogging the filter bucket. The process does not require workers to manually clean, which effectively reduces the labor intensity of workers and improves the convenience of cleaning.

[0015] 2. When the surface of the magnetic rod is full of iron filings, the servo push cylinder will work to drive the magnetic rod to move up so that the magnetic rod can extend from the filter bucket. Then the load-bearing shaft continues to drive the magnetic rod on the L-shaped frame to rotate in a circle. At this time, the extension frame on the guide wheel rotates synchronously with the L-shaped frame. After the guide wheel moves to the V-shaped frame, when the load-bearing shaft rotates, the guide wheel will roll on the surface of the V-shaped frame to drive the extension frame to slide forward on the guide rod, and then drive the push frame forward, so that the shovel ring on the push frame can slide on the surface of the magnetic rod, push the iron filings adsorbed on the surface of the magnetic rod down and drop them into the collecting bucket for collection, so as to ensure the good adsorption of the magnetic rod, and when the servo push cylinder drives the magnetic rod full of iron filings to move up, the No. 2 tooth plate will move up synchronously, drive the gear to rotate, and then drive the No. 1 tooth plate to move down, thereby driving the magnetic rod on the other L-shaped frame to move down and extend into the filter bucket to work, and this cycle can achieve the purpose of continuous cleaning to ensure its cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of a heat exchanger with a self-cleaning function according to the present invention; Figure 2 This is a schematic diagram of a collection bucket of a heat exchanger with a self-cleaning function according to the present invention; Figure 3 A heat exchanger with a self-cleaning function according to the present invention Figure 2 Schematic diagram from another perspective; Figure 4 A heat exchanger with a self-cleaning function according to the present invention Figure 2 A magnified view of middle; Figure 5 A schematic diagram of a V-shaped frame of a heat exchanger with a self-cleaning function according to the present invention; Figure 6 This is a schematic diagram of a magnetic rod of a heat exchanger with a self-cleaning function according to the present invention.

[0017] In the figure: 1. tower shell; 2. filter bucket; 3. fixing frame; 4. collecting bucket; 5. fixing column; 6. V-shaped frame; 7. motor frame; 8. servo motor; 9. magnetic rod; 10. fixing cap; 11. L-shaped frame; 12. guide wheel; 13. load-bearing shaft; 14. rotating frame; 15. axle; 16. guide rod; 17. spring body; 18. limiting cap; 19. fixing ear; 20. extension frame; 21. guide frame; 22. connecting frame; 23. anti-drop cap; 24. extension cap; 25. pushing frame; 26. shovel ring; 27. fixing block; 28. battery; 29. ​​cylinder frame; 30. servo push cylinder; 31. connecting shaft; 32. gear; 33. No. 1 tooth plate; 34. No. 2 tooth plate; 35. fixing sleeve; 36. mounting ear. DETAILED DESCRIPTION

[0018] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0019] like Figure 1-Figure 6 The heat exchanger with self-cleaning function shown in the figure comprises a tower shell 1 and a filter bucket 2 installed at the upper end of the tower shell 1. A driving and rotating pusher is arranged in the middle of the upper end of the tower shell 1. L-shaped frames 11 are slidably installed at both ends of the driving and rotating pusher. The two L-shaped frames 11 are symmetrically arranged. The L-shaped frames 11 play the role of supporting the magnetic rod 9. One of the L-shaped frames 11 is higher than the other L-shaped frame 11. The lower ends of the two L-shaped frames 11 are connected to the magnetic rod 9. The magnetic rod 9 on the other L-shaped frame 11 is located inside the filter bucket 2. The magnetic rod 9 plays the role of adsorbing iron filings. An elastic pusher is installed at the upper end of the L-shaped frame 11. The servo motor 8 drives the bearing shaft 13 to rotate, so as to drive the rotating frame 14 to rotate through the rotating bearing shaft 13. , thereby driving the guide frame 21 on the rotating frame 14 to rotate, thereby driving the magnetic bar 9 on the L-shaped frame 11 to rotate in a circle, so that it can move in the filter bucket 2, so as to use the magnetism of the magnetic bar 9 to absorb the iron filings filtered out by the filter bucket 2 to avoid clogging of the filter bucket 2, and the end of the elastic push piece is connected with a shovel ring 26, which is attached to the outer surface of the magnetic bar 9. The shovel ring 26 plays the role of removing the iron filings on the surface of the magnetic bar 9. One end of the magnetic bar 9 is fixedly installed with an extension cap 24, and the extension cap 24 and the shovel ring 26 are both made of materials that are not absorbed by the magnetic bar 9, so as to facilitate the movement of the shovel ring 26 on the magnetic bar 9, and at the same time, the extension cap 24 can be used to block the end of the magnetic bar 9 to prevent the iron filings from being absorbed by the end of the magnetic bar 9 and unable to be pushed down.

[0020] A fixing cap 10 is fixedly installed on the other end of the magnetic rod 9, and the upper end of the fixing cap 10 is fixed to the L-shaped frame 11. The fixing cap 10 plays a role in fixing the magnetic rod 9. The outer surface of the extending cap 24 is coplanar with the outer surface of the magnetic rod 9, which can facilitate the shovel ring 26 to be pushed onto the extending cap 24. The elastic pushing member includes a guide rod 16 installed on the upper end of the L-shaped frame 11. The outer surface of the guide rod 16 is fitted with an extending frame 20. The guide rod 16 plays a role in guiding the extending frame 20. A pushing frame 25 is fixedly installed on the front end of the extending frame 20. The end of the pushing frame 25 is fixed to the upper end of the shovel ring 26. The pushing frame 25 plays a role in being driven by the extending frame 20 to push the shovel ring 26.

[0021] A fixing ear 19 is fixedly installed at one end of the guide rod 16, and the lower end of the fixing ear 19 is fixed to the upper end of the L-shaped frame 11, and the fixing ear 19 plays a role in fixing the guide rod 16. A limiting cap 18 is coaxially fixedly installed on the other end of the guide rod 16. A spring body 17 is wrapped around the outer side of the guide rod 16, and one end of the spring body 17 is fixed to the extension frame 20. The limiting cap 18 plays a role in supporting the spring body 17. The other end of the spring body 17 is fixed to the limiting cap 18. The spring body 17 can push the extension frame 20 so that the guide wheel 12 can fully fit on the V-shaped frame 6 for rolling. A wheel axle 15 is fixedly installed at the upper end edge of the extension frame 20, and the guide wheel 12 is coaxially installed on the outer surface of the wheel axle 15. The wheel axle 15 plays a role in supporting the guide wheel 12.

[0022] The driving member includes a load-bearing shaft 13 coaxially arranged just above the tower shell 1, a fixing sleeve 35 is coaxially fixedly installed on the lower end of the load-bearing shaft 13, a rotating frame 14 is embedded in the interior of the fixing sleeve 35, and the fixing sleeve 35 serves to fix the rotating frame 14, and guide frames 21 are fixedly installed on both ends of the rotating frame 14, the upper end of the L-shaped frame 11 is slidably installed on the outer surface of the guide frame 21, and the guide frame 21 serves to vertically guide the L-shaped frame 11, and an anti-drop cap 23 is fixedly installed on the lower end of the guide frame 21, and the anti-drop cap 23 serves to limit the downward movement height of the L-shaped frame 11.

[0023] A gear 32 is connected to the front end of the fixing sleeve 35. A second tooth plate 34 is meshed with one side of the gear 32, and a first tooth plate 33 is meshed with the other side of the gear 32. The cooperation between the gear 32 and the second tooth plate 34 and the first tooth plate 33 allows the two magnetic bars 9 to move in opposite directions. The height of the second tooth plate 34 is lower than that of the first tooth plate 33. A connecting frame 22 is fixedly installed at the lower edge of the side surface of the second tooth plate 34 and the lower edge of the side surface of the first tooth plate 33. The connecting frame 22 on the second tooth plate 34 is fixed to another L-shaped frame 11. The connecting frame 22 connects the second tooth plate 34, the first tooth plate 33 and the two L-shaped frames 11, and the connecting frame 22 on the first tooth plate 33 is fixed to one of the L-shaped frames 11.

[0024] A collecting bucket 4 is fixedly installed at the upper edge of the tower shell 1, and the collecting bucket 4 serves to collect iron filings. A fixing frame 3 is fixedly installed on the side of the collecting bucket 4, and a servo motor 8 is connected to the end of the fixing frame 3. The fixing frame 3 serves to support the V-shaped frame 6. The output end of the servo motor 8 is fixed to the upper end of the load-bearing shaft 13, and the servo motor 8 drives the load-bearing shaft 13 to rotate. The front end of the rotating frame 14 is connected to a servo push cylinder 30, and the servo push cylinder 30 serves to alternate the positions of the two magnetic bars 9. The output end of the servo push cylinder 30 is fixed to the connecting frame 22 on the second tooth plate 34.

[0025] A connecting shaft 31 is coaxially installed inside the gear 32, and the end of the connecting shaft 31 is fixed to the fixed sleeve 35. The connecting shaft 31 serves to connect the gear 32. A cylinder frame 29 is fixedly installed at the rear end of the servo push cylinder 30. The cylinder frame 29 is embedded in the outer surface of the rotating frame 14. The cylinder frame 29 serves to fix the servo push cylinder 30. A battery 28 is fixedly installed on the upper end of the cylinder frame 29. The battery 28 serves to power the servo push cylinder 30. The servo push cylinder 30 can be controlled by wireless control technology. Since wireless control technology is a prior art, it is not elaborated in detail here. A motor frame 7 is fixedly installed at the front end of the servo motor 8. The motor frame 7 serves to fix the servo motor 8. The end of the motor frame 7 is fixed to the fixed frame 3.

[0026] A fixing column 5 is embedded through the end of the fixing frame 3, and a fixing block 27 is fixedly installed on the end of the fixing column 5. The fixing column 5 and the fixing block 27 play a role in fixing the V-shaped frame 6. The end of the fixing block 27 is embedded with a V-shaped frame 6. The V-shaped frame 6 plays a role in pushing the extending frame 20. The V-shaped frame 6 is located on the upper side of the collecting bucket 4, which can facilitate iron filings to fall into the collecting bucket 4. A plurality of mounting ears 36 are fixedly installed in a ring array at the lower edge of the outer surface of the tower shell 1. The mounting ears 36 play a role in mounting the tower shell 1.

[0027] During cleaning, the servo motor 8 works to drive the bearing shaft 13 to rotate, so as to drive the rotating frame 14 to rotate through the rotating bearing shaft 13, and then drive the guide frame 21 on the rotating frame 14 to rotate, thereby driving the magnetic rod 9 on the L-shaped frame 11 to rotate in a circle, so that it can move in the filter bucket 2, so as to use the magnetism of the magnetic rod 9 to absorb the iron filings filtered out by the filter bucket 2 to avoid clogging of the filter bucket 2. When the surface of the magnetic rod 9 is full of iron filings, the servo push cylinder 30 will work to drive the magnetic rod 9 to move up, so that the magnetic rod 9 can extend from the filter bucket 2, and then the bearing shaft 13 continues to drive the magnetic rod 9 on the L-shaped frame 11 to rotate in a circle. At this time, the extension frame 20 on the guide wheel 12 rotates synchronously with the L-shaped frame 11 After the guide wheel 12 moves to the V-shaped frame 6, when the bearing shaft 13 rotates, the guide wheel 12 will roll against the surface of the V-shaped frame 6 to drive the extension frame 20 to slide forward on the guide rod 16, and then drive the pushing frame 25 to move forward, so that the shovel ring 26 on the pushing frame 25 can slide on the surface of the magnetic rod 9, so as to push the iron filings adsorbed on the surface of the magnetic rod 9 and push them down and drop them into the collecting bucket 4 for collection, and when the servo push cylinder 30 drives the magnetic rod 9 full of iron filings to move up, the second tooth plate 34 will move up synchronously to drive the gear 32 to rotate, and then drive the first tooth plate 33 to move down, thereby driving the magnetic rod 9 on the other L-shaped frame 11 to move down and extend into the filter bucket 2 to work, and this cycle is repeated to achieve the purpose of continuous cleaning.

[0028] In the present invention, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In the description of this specification, if the terms "one embodiment", "some embodiments", "specific embodiments" and the like appear, it means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0030] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A heat exchanger with a self-cleaning function, comprising a tower shell (1) and a filter hopper (2) installed at the upper end of the tower shell (1), characterized in that: A driving and rotating pusher is arranged at the middle of the upper end of the tower shell (1), and L-shaped frames (11) are slidably mounted at both ends of the driving and rotating pusher. The two L-shaped frames (11) are symmetrically arranged, and one of the L-shaped frames (11) is higher than the other L-shaped frame (11). The lower ends of the two L-shaped frames (11) are connected to magnetic bars (9), and the magnetic bar (9) on the other L-shaped frame (11) is located inside the filter bucket (2). An elastic pusher is installed at the upper end of the L-shaped frame (11), and a shovel ring (26) is connected to the end of the elastic pusher. The shovel ring (26) is fitted to the outer surface of the magnetic bar (9), and a protruding cap (24) is fixedly mounted on one end of the magnetic bar (9).

2. A heat exchanger with a self-cleaning function according to claim 1, characterized in that: A fixing cap (10) is fixedly mounted on the other end of the magnetic rod (9), the upper end of the fixing cap (10) is fixed to the L-shaped frame (11), the outer surface of the extending cap (24) is coplanar with the outer surface of the magnetic rod (9), the elastic push member comprises a guide rod (16) mounted on the upper end of the L-shaped frame (11), the outer surface of the guide rod (16) is fitted with an extending frame (20), a pushing frame (25) is fixedly mounted on the front end of the extending frame (20), and the end of the pushing frame (25) is fixed to the upper end of the shovel ring (26).

3. A heat exchanger with a self-cleaning function according to claim 2, characterized in that: A fixing ear (19) is fixedly mounted on one end of the guide rod (16), the lower end of the fixing ear (19) is fixed to the upper end of the L-shaped frame (11), the other end of the guide rod (16) is coaxially fixedly mounted with a limiting cap (18), a spring body (17) is wound around the outer side of the guide rod (16), one end of the spring body (17) is fixed to the extension frame (20), the other end of the spring body (17) is fixed to the limiting cap (18), a wheel shaft (15) is fixedly mounted on the upper end edge of the extension frame (20), and a guide wheel (12) is coaxially mounted on the outer surface of the wheel shaft (15).

4. The heat exchanger with self-cleaning function according to claim 1, characterized in that: The driving member comprises a bearing shaft (13) coaxially arranged directly above the tower shell (1); a fixing sleeve (35) is coaxially fixedly mounted on the lower end of the bearing shaft (13); a rotating frame (14) is embedded in the interior of the fixing sleeve (35); guide frames (21) are fixedly mounted on both ends of the rotating frame (14); the upper end of the L-shaped frame (11) is slidably mounted on the outer surface of the guide frame (21); and an anti-drop cap (23) is fixedly mounted on the lower end of the guide frame (21).

5. A heat exchanger with a self-cleaning function according to claim 4, characterized in that: The front end of the fixing sleeve (35) is connected to a gear (32), one side of the gear (32) is meshed with a second gear plate (34), and the other side of the gear (32) is meshed with a first gear plate (33), the height of the second gear plate (34) is lower than the height of the first gear plate (33), and a connecting frame (22) is fixedly installed at the lower edge of the side surface of the second gear plate (34) and the lower edge of the side surface of the first gear plate (33), the connecting frame (22) on the second gear plate (34) is fixed to another L-shaped frame (11), and the connecting frame (22) on the first gear plate (33) is fixed to one of the L-shaped frames (11).

6. A heat exchanger with a self-cleaning function according to claim 5, characterized in that: A collecting bucket (4) is fixedly mounted at the upper edge of the tower shell (1), a fixing frame (3) is fixedly mounted on the side of the collecting bucket (4), a servo motor (8) is connected to the end of the fixing frame (3), an output end of the servo motor (8) is fixed to the upper end of the bearing shaft (13), a servo push cylinder (30) is connected to the front end of the rotating frame (14), and an output end of the servo push cylinder (30) is fixed to the connecting frame (22) on the second gear plate (34).

7. A heat exchanger with a self-cleaning function according to claim 6, characterized in that: A connecting shaft (31) is coaxially rotatably mounted inside the gear (32), an end of the connecting shaft (31) is fixed to a fixed sleeve (35), a cylinder frame (29) is fixedly mounted at the rear end of the servo push cylinder (30), the cylinder frame (29) is embedded in the outer surface of the rotating frame (14), a battery (28) is fixedly mounted on the upper end of the cylinder frame (29), a motor frame (7) is fixedly mounted at the front end of the servo motor (8), and an end of the motor frame (7) is fixed to the fixed frame (3).

8. The heat exchanger with self-cleaning function according to claim 7, characterized in that: A fixing column (5) is embedded through the end of the fixing frame (3), a fixing block (27) is fixedly mounted on the end of the fixing column (5), a V-shaped frame (6) is embedded on the end of the fixing block (27), and the V-shaped frame (6) is located above the side of the collecting bucket (4). A plurality of mounting ears (36) are fixedly mounted in an annular array at the lower edge of the outer surface of the tower shell (1).

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