Transformer with low-loss heat dissipation structure

Abstract

The invention discloses a transformer with a low-loss heat dissipation structure, relates to the field of transformers, and solves the problems that when an existing transformer with a low-loss heat dissipation structure is used, the position of the heat dissipation structure is fixed, the wind direction is difficult to identify, and air is difficult to convey into equipment for auxiliary heat dissipation to reduce power consumption. Comprising a base, a transformer body and a heat dissipation mechanism, the heat dissipation mechanism comprises a shell, a filter screen, a driving ring, a rotating rod, fan blades, a sensing part and a control part, the driving ring is driven by the heat dissipation mechanism to enable the fan blades to rotate continuously, and the swing angle of the fan blades is controlled through the control part according to the wind direction; the fan blades can assist in feeding wind to the periphery of the transformer body when rotating on the wind incoming side, and the swing direction of the fan blades is adjusted when rotating to the wind outgoing side to generate reverse thrust to assist in discharging hot wind around the transformer body outwards and outputting the hot wind along with the wind direction. And impurities on the outer wall of the filter screen can be scraped in an auxiliary manner while the angles of the fan blades are switched.

Description

Technical Field

[0001] The present invention relates to the technical field of transformers, and in particular to a transformer with a low-loss heat dissipation structure. Background Art

[0002] A transformer is a device that uses the principle of electromagnetic induction to change AC voltage. Its main components are a primary coil, a secondary coil, and an iron core (magnetic core). Currently, low-loss transformers can also reach high temperatures during long-term operation. Excessive temperatures can reduce the transformer's operating efficiency and output stability, especially in the hot summer. High temperatures can even cause the transformer to spontaneously combust. To improve the heat dissipation of low-loss transformers, cooling holes are usually opened on the side of the transformer and a cooling fan is installed inside the transformer to enhance heat dissipation.

[0003] However, the existing heat dissipation structure and the position of the heat dissipation holes are relatively fixed. During use, heat is mainly dissipated through its own fan structure, and it is difficult to utilize the external airflow, resulting in relatively high energy consumption. When the exhaust position is opposite to the wind direction, the internal gas discharge resistance of the body will increase and the heat dissipation efficiency will be reduced. In order to improve the automatic reception efficiency of the external wind during the heat dissipation process and promote auxiliary heat dissipation of the internal structure of the transformer, a transformer with a low-loss heat dissipation structure is proposed. Summary of the Invention

[0004] The purpose of the present invention is to provide a transformer with a low-loss heat dissipation structure that is easy to automatically sense wind direction and automatically input gas from the wind direction to the inside of the device for heat dissipation during the heat dissipation process, and output it from the wind direction, thereby reducing the power consumption of the device, so as to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a transformer with a low-loss heat dissipation structure, comprising a base and a heat dissipation mechanism, wherein the base is fixedly connected to a transformer body, the heat dissipation mechanism comprises a shell and a filter screen fixedly mounted on the base, the shell and the filter screen are both cylindrical, a driving ring is rotatably connected to the base, a plurality of groups of rotating rods are evenly rotatably connected to the upper side of the driving ring, fan blades are fixedly connected to the rotating rods, a sensing member for sensing wind direction is provided on the upper side of the transformer body, and a sensor for controlling the swing of the fan blades according to the wind direction is provided on the upper side of the transformer body. The fan blades are controlled by the control member to adjust the swing angle according to the wind direction, so that the fan blades can assist in sending wind into the vicinity of the transformer body when rotating on the incoming wind side, and adjust the swing direction of the fan blades when rotating to the outgoing wind side to generate reverse thrust, thereby assisting in discharging the hot air around the transformer body outward and outputting it along the wind direction, so as to automatically sense the wind direction and automatically input the gas from the incoming wind direction to the inside of the device for heat dissipation during the heat dissipation process, and output it from the outgoing wind direction, thereby reducing the power consumption of the device.

[0006] Preferably, the control component includes a support net fixedly mounted on the upper side of the base, the filter net is fixed to the outer wall of the support net, the inner wall of the drive ring is fitted and rotated with the outer wall of the filter net, the outer wall of the drive ring is rotationally fitted with the inner wall of the shell, the top inner wall of the shell is rotatably connected to a rotating ring, the rotating rod passes through the rotating ring and is rotatably connected to the rotating ring, and an adjusting component for adjusting the rotation angle of the rotating rod is provided on the upper side of the shell, so as to facilitate controlling the swing angle of the fan blade according to the wind direction.

[0007] Preferably, the adjusting member includes a driving disk coaxially fixedly connected to the top of the rotating rod, five groups of driving grooves are evenly opened on the driving disk, the upper end of the supporting net is rotatably connected to the rotating disk, the upper side of the rotating disk is fixedly connected to the connecting disk, the bottom of the connecting disk is fixedly connected to the connecting ring, the bottom surface of the connecting ring is rotatably connected to the top of the shell, and the rotating disk and the connecting ring are provided with a pushing member for controlling the rotation angle of the driving disk, so as to facilitate the adjustment of the rotation angle of the rotating rod.

[0008] Preferably, the pushing member includes a first pushing block and a second pushing block fixedly mounted on the inner wall of the connecting ring, and a third pushing block and a fourth pushing block are fixedly connected to the outer wall of the rotating disk, the first pushing block, the second pushing block, the third pushing block and the fourth pushing block are evenly spaced and can all engage with the driving groove, and the rotating ring is provided with a limiting member for assisting in limiting the rotation angle of the driving disk, so as to facilitate the control of the rotation angle of the driving disk.

[0009] Preferably, the sensing component includes a top cover fixedly installed above the shell, the top of the top cover is fixedly connected to a wind direction sensor, a first motor is fixedly connected inside the top cover, the output end of the first motor is coaxially fixedly connected to a first gear, the inner wall of the rotating disk is fixedly connected to a first inner gear ring, and the first inner gear ring is meshed with the first gear to facilitate sensing of wind direction.

[0010] Preferably, the limiting member includes a guide frame fixedly mounted on the rotating ring, a limiting block is slidably connected in the guide frame, one end of the limiting block is arc-shaped and can be plugged into the driving groove, and a spring fixedly connected to the guide frame is fixedly connected to the limiting block to assist in limiting the rotation angle of the driving disk.

[0011] Preferably, the heat dissipation mechanism also includes a second motor fixedly mounted on the base, the output end of the second motor is coaxially fixedly connected to a second gear, the bottom end of the drive ring is coaxially fixedly connected to a second inner gear ring, and the second inner gear ring can engage with the second gear to facilitate driving the drive ring to rotate continuously.

[0012] Preferably, an indicator arrow is provided on the connecting disk, and the indicator arrow is located between the first pushing block and the fourth pushing block. The tip of the indicator arrow is used to point to the direction of the wind, so as to indicate the direction of the wind.

[0013] Preferably, a plurality of heat dissipation slots are evenly arranged on the shell to facilitate the flow of gas into and out of the shell.

[0014] Preferably, the top surface of the top cover is conical to reduce dust residue above it.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The transformer with a low-loss heat dissipation structure provided by the present invention solves the problem that the heat dissipation structure of the existing transformer with a low-loss heat dissipation structure is fixed in position during use, making it difficult to identify the wind direction and assist in delivering wind to the inside of the equipment for auxiliary heat dissipation and reducing power consumption. The heat dissipation mechanism drives the driving ring to continuously rotate the fan blades, and the control component controls the swing angle of the fan blades according to the wind direction, so that the fan blades can assist in delivering wind into the surrounding area of ​​the transformer body when rotating on the incoming wind side, and adjust the swing direction of the fan blades when rotating to the outgoing wind side to generate reverse thrust, thereby assisting in discharging the hot air around the transformer body outward and outputting it along the wind direction. The structure can assist in scraping off impurities on the outer wall of the filter while switching the angle of the fan blades, and discharge them along with the wind force, thereby improving the use efficiency and service life of the filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the partial structure of the sensing element of the present invention; Figure 3 This is a schematic diagram of the partial structure of the adjusting member of the present invention; Figure 4 This is a top view of the local structure of the control component of the present invention; Figure 5 for Figure 4 Enlarged view of area A in the middle; Figure 6 for Figure 4 Enlarged view of area B in the middle; Figure 7 for Figure 4 Enlarged view of area C in the middle; Figure 8 for Figure 4 Enlarged view of area D in the middle; Figure 9 This is a cross-sectional view of the local structure of the control component of the present invention; Figure 10 for Figure 9 Enlarged view of area E in the middle; Figure 11 It is a schematic diagram of the partial structure of the heat dissipation mechanism of the present invention; Figure 12 for Figure 11 Enlarged view of area F in the middle; Figure 13 Schematic diagram of the structure of the relevant embodiment of the present invention.

[0017] In the figure: 1-base; 2-transformer body; 3-heat dissipation mechanism; 4-housing; 5-filter; 6-drive ring; 7-rotating rod; 8-fan blade; 9-sensing member; 10-control member; 11-support net; 12-rotating ring; 13-adjusting member; 14-drive disk; 15-drive slot; 16-rotating disk; 17-connecting disk; 18-connecting ring; 19-pushing member; 20-first pushing block; 21-second pushing block; 22-third pushing block; 23-fourth pushing block; 24-limiting member; 25-top cover; 26-wind direction sensor; 27-first motor; 28-first gear; 29-first inner gear ring; 30-guide frame; 31-limiting block; 32-spring; 33-second motor; 34-second gear; 35-second inner gear ring; 36-indicating arrow; 37-heat dissipation slot; 38-third gear; 39-electric telescopic rod; 40-rack DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0019] See also Figures 1-13 The present invention provides a technical solution: a transformer with a low-loss heat dissipation structure, comprising a base 1 and a heat dissipation mechanism 3, wherein a transformer body 2 is fixedly connected to the base 1, and a shell 4 is evenly provided with multiple groups of heat dissipation grooves 37, the heat dissipation mechanism 3 comprises a shell 4 fixedly mounted on the base 1 and a filter 5, both of which are cylindrical, a drive ring 6 is rotatably connected to the base 1, and a plurality of rotating rods 7 are evenly rotatably connected to the upper side of the drive ring 6, and fan blades 8 are fixedly connected to the rotating rods 7, a sensor 9 for sensing wind direction is provided on the upper side of the transformer body 2, and a control member 10 for controlling the swing angle of the fan blades 8 according to the wind direction is provided on the upper side of the transformer body 2, the heat dissipation mechanism 3 can drive the drive ring 6 to continuously rotate the fan blades 8, and the control member 10 controls the swing angle of the fan blades 8 according to the wind direction, so that when the fan blades 8 rotate on the incoming wind side, they can assist in sending wind into the surrounding of the transformer body 2, and when rotating to the outgoing wind side, the fan blades 8 adjust their swing direction to generate reverse thrust, thereby assisting in discharging the hot air around the transformer body 2 outward and outputting it in the direction of the wind.

[0020] The control component 10 includes a support net 11 fixedly mounted on the upper side of the base 1, the filter net 5 is fixedly fitted with the outer wall of the support net 11, the inner wall of the drive ring 6 is fitted and rotated with the outer wall of the filter net 5, the outer wall of the drive ring 6 is fitted and rotated with the inner wall of the shell 4, and the top inner wall of the shell 4 is rotatably connected to a rotating ring 12, the rotating rod 7 passes through the rotating ring 12 and is rotatably connected to the rotating ring 12, and an adjusting component 13 for adjusting the rotation angle of the rotating rod 7 is provided on the upper side of the shell 4.

[0021] The adjusting member 13 includes a driving disk 14 coaxially fixedly connected to the top of the rotating rod 7, and five groups of driving grooves 15 are evenly opened on the driving disk 14. The upper end of the support net 11 is rotatably connected to the rotating disk 16, and the upper side of the rotating disk 16 is fixedly connected to the connecting disk 17. An indicator arrow 36 is provided on the connecting disk 17. The indicator arrow 36 is located between the first push block 20 and the fourth push block 23. The tip of the indicator arrow 36 is used to point to the direction of the wind. The bottom of the connecting disk 17 is fixedly connected to a connecting ring 18, and the bottom surface of the connecting ring 18 is rotatably connected to the top of the shell 4. The rotating disk 16 and the connecting ring 18 are provided with a pushing member 19 for controlling the rotation angle of the driving disk 14.

[0022] The pushing member 19 includes a first pushing block 20 and a second pushing block 21 fixedly mounted on the inner wall of the connecting ring 18, and a third pushing block 22 and a fourth pushing block 23 are fixedly connected to the outer wall of the rotating disk 16. The first pushing block 20, the second pushing block 21, the third pushing block 22 and the fourth pushing block 23 are evenly arranged at equal intervals and can all engage with the driving groove 15. A limiting member 24 is provided on the rotating ring 12 for assisting in limiting the rotation angle of the driving disk 14.

[0023] The sensing component 9 includes a top cover 25 fixedly mounted on the top of the shell 4. The top surface of the top cover 25 is conical. A wind direction sensor 26 is fixedly connected to the top of the top cover 25. A first motor 27 is fixedly connected inside the top cover 25. The output end of the first motor 27 is coaxially fixedly connected to a first gear 28. A first inner gear ring 29 is fixedly connected to the inner wall of the rotating disk 16. The first inner gear ring 29 is meshed with the first gear 28.

[0024] The limit member 24 includes a guide frame 30 fixedly mounted on the rotating ring 12, and a limit block 31 is slidably connected inside the guide frame 30. One end of the limit block 31 is arc-shaped and can be plugged into the drive groove 15. A spring 32 fixedly connected to the guide frame 30 is fixedly connected to the limit block 31.

[0025] The heat dissipation mechanism 3 also includes a second motor 33 fixedly mounted on the base 1 , the output end of the second motor 33 is coaxially fixedly connected to the second gear 34 , and the bottom end of the drive ring 6 is coaxially fixedly connected to the second inner gear ring 35 , which can engage with the second gear 34 .

[0026] In this implementation plan, it is stipulated that Figure 4 The middle rotating disk 16 rotates clockwise for forward rotation, and vice versa for reverse rotation. When in use, the wind direction sensor 26 senses the direction of the wind, and controls the first motor 27 to drive the first gear 28 to rotate, so that the first inner gear ring 29 drives the rotating disk 16 to rotate, and the rotating disk 16 drives the connecting disk 17 and the connecting ring 18 to rotate, and adjusts the positions of the internal first pushing block 20, the second pushing block 21, the third pushing block 22 and the fourth pushing block 23 so that the tip of the indicator arrow 36 points to the direction of the wind. During this process, the second motor 33 continuously drives the second gear 34 to rotate, and the second gear 34 drives the second inner gear ring 35 to rotate, so that the drive ring 6 rotates, and the drive ring 6 drives the upper rotating rod 7 and the fan blades 8 to rotate synchronously around the axis of the drive ring 6.

[0027] When the driving disk 14 is in the position between the first pushing block 20 and the second pushing block 21, one side of the fan blade 8 points to the axis of the driving ring 6. At this time, the edge of the fan blade 8 can fit the outer wall of the filter 5, scraping off the dust and impurities on the outer wall of the filter 5, and assisting in the cleaning operation of the filter 5. When the driving disk 14 passes the second pushing block 21, the second pushing block 21 will first be stuck in the driving groove 15 and then push the driving disk 14 to rotate one grid in the opposite direction, so that the limit block 31 slides out of the current driving groove 15 and is stuck in the limit position in the next set of driving grooves 15. At this time, the driving disk 14 drives the rotating rod 7 and the fan blade 8 to rotate the set angle to complete the adjustment, so that the fan blade 8 can push the gas in the outgoing direction when it swings to the outgoing direction, assisting in the output of the hot air around the transformer body 2 inside the shell 4. At this time, the edge of the fan blade 8 no longer fits the outer wall of the filter 5.

[0028] When the driving disc 14 rotates to the position of the third pushing block 22, the thrust of the third pushing block 22 is received, which causes the driving disc 14 to rotate one grid in the positive clockwise direction until the limit block 31 is stuck in the adjacent driving groove 15 and is limited again. At this time, the fan blade 8 points to the axis of the driving ring 6 again, and the edge of the fan blade 8 is again in contact with the outer wall of the filter screen 5, assisting in scraping impurities on the outer wall of the filter screen 5. When the driving disc 14 rotates to the position of the fourth pushing block 23, the fourth pushing block 23 pushes the driving disc 14 to rotate one grid in the positive clockwise direction, and the limit block 31 is stuck in the adjacent driving groove 15 and is limited again. At this time, the inclination direction of the fan blade 8 is In the opposite direction of the inclination of the opposite side fan blade 8, the fan blade 8 will push the gas to the filter 5 through the inner wall during the clockwise rotation of the drive ring 6. After being filtered by the filter 5, the gas is transported to the surrounding of the transformer body 2, thereby improving the heat dissipation efficiency while not making the gas transport direction opposite to the wind direction. Finally, when the drive disk 14 rotates to the first push block 20 again, the first push block 20 pushes the drive disk 14 to rotate counterclockwise by one grid. After the drive slot 15 is released from the conflict with the first push block 20, the limit block 31 slides to the adjacent drive slot 15 and limits again. At this point, the fan blade 8 completes a cycle switch.

[0029] It is worth noting that: by repeating the above steps, the fan blades 8 can draw the wind into the support net 11 through the heat dissipation slots 37 when rotating to the wind-incoming end, and automatically change the inclination angle of the fan blades 8 when rotating to the wind-outward side, to assist in discharging the hot air inside the support net 11, thereby improving the airflow transmission efficiency and reducing energy consumption. This structure can assist in scraping off impurities on the outer wall of the filter net 5 while the fan blades 8 switch angles, and discharge them with the wind force, thereby improving the use efficiency and service life of the filter net 5. When the wind direction changes, the equipment can automatically sense the wind direction change through the wind direction sensor 26, and control the operating status of the first motor 27, so that the indicator arrow 36 always points to the direction of the wind, thereby controlling the switching position of the fan blades 8.

[0030] Please see the attached Figure 13 The device can also adjust the swing angle of the fan blade 8 by coaxially arranging a third gear 38 on the rotating rod 7 and arranging an electric telescopic rod 39 on the rotating ring 12. The rack 40 arranged at the output end of the electric telescopic rod 39 engages and drives the third gear 38 to rotate. At this time, there is no need to set the first push block 20, the second push block 21, the third push block 22 and the fourth push block 23, which reduces the impact wear of the drive disk 14. However, this structure requires a large number of electric telescopic rods 39, which will consume more energy during use, and the production and use costs will increase. This structure only provides a replaceable embodiment. Similarly, other driving methods can also be used for control and drive, which are not listed here one by one.

[0031] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0032] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A transformer with a low-loss heat dissipation structure, characterized in that: include: A base (1), to which a transformer body (2) is fixedly connected; Also includes: A heat dissipation mechanism (3), the heat dissipation mechanism (3) comprising a shell (4) and a filter (5) fixedly mounted on the base (1), the shell (4) and the filter (5) both being cylindrical, a driving ring (6) being rotatably connected to the base (1), a plurality of rotating rods (7) being evenly rotatably connected to the upper side of the driving ring (6), a fan blade (8) being fixedly connected to the rotating rod (7), a sensing member (9) for sensing wind direction being provided on the upper side of the transformer body (2), and a sensor (9) for controlling the wind direction according to the wind direction being provided on the upper side of the transformer body (2). The control member (10) for the swing angle of the fan blade (8) is configured such that the heat dissipation mechanism (3) can continuously rotate the fan blade (8) by driving the drive ring (6), and the swing angle of the fan blade (8) is controlled by the control member (10) according to the wind direction, so that the fan blade (8) can assist in sending wind into the vicinity of the transformer body (2) when rotating on the incoming wind side, and adjust the swing direction of the fan blade (8) when rotating to the outgoing wind side to generate reverse thrust, thereby assisting in discharging the hot air around the transformer body (2) outward and outputting it in the direction of the wind.

2. The transformer with a low-loss heat dissipation structure according to claim 1, characterized in that: The control member (10) includes a support net (11) fixedly mounted on the upper side of the base (1); the filter net (5) is fixedly fitted with the outer wall of the support net (11); the inner wall of the drive ring (6) is fitted and rotated with the outer wall of the filter net (5); the outer wall of the drive ring (6) is fitted and rotated with the inner wall of the shell (4); the top inner wall of the shell (4) is rotatably connected to a rotating ring (12); the rotating rod (7) passes through the rotating ring (12) and is rotatably connected to the rotating ring (12); and an adjusting member (13) for adjusting the rotation angle of the rotating rod (7) is provided on the upper side of the shell (4).

3. The transformer with a low-loss heat dissipation structure according to claim 2, characterized in that: The adjusting member (13) comprises a driving disk (14) coaxially fixedly connected to the top end of the rotating rod (7), five groups of driving grooves (15) are evenly opened on the driving disk (14), the upper end of the supporting net (11) is rotatably connected to the rotating disk (16), the upper side of the rotating disk (16) is fixedly connected to the connecting disk (17), the bottom of the connecting disk (17) is fixedly connected to the connecting ring (18), the bottom surface of the connecting ring (18) is rotatably connected to the top end of the housing (4), and a pushing member (19) for controlling the rotation angle of the driving disk (14) is provided on the rotating disk (16) and the connecting ring (18).

4. The transformer with a low-loss heat dissipation structure according to claim 3, characterized in that: The pushing member (19) includes a first pushing block (20) and a second pushing block (21) fixedly mounted on the inner wall of the connecting ring (18); a third pushing block (22) and a fourth pushing block (23) are fixedly connected to the outer wall of the rotating disk (16); the first pushing block (20), the second pushing block (21), the third pushing block (22) and the fourth pushing block (23) are evenly spaced and can all engage with the driving groove (15); and a limiting member (24) for assisting in limiting the rotation angle of the driving disk (14) is provided on the rotating ring (12).

5. The transformer with a low-loss heat dissipation structure according to claim 3, characterized in that: The sensing element (9) comprises a top cover (25) fixedly mounted above the housing (4); a wind direction sensor (26) is fixedly connected to the top of the top cover (25); a first motor (27) is fixedly connected inside the top cover (25); an output end of the first motor (27) is coaxially fixedly connected to a first gear (28); a first inner gear ring (29) is fixedly connected to the inner wall of the rotating disk (16); and the first inner gear ring (29) is meshed with the first gear (28).

6. The transformer with a low-loss heat dissipation structure according to claim 4, characterized in that: The limiting member (24) includes a guide frame (30) fixedly mounted on the rotating ring (12), a limiting block (31) is slidably connected in the guide frame (30), one end of the limiting block (31) is arc-shaped and can be plugged into the driving groove (15), and a spring (32) fixedly connected to the guide frame (30) is fixedly connected to the limiting block (31).

7. The transformer with a low-loss heat dissipation structure according to claim 1, characterized in that: The heat dissipation mechanism (3) further comprises a second motor (33) fixedly mounted on the base (1); an output end of the second motor (33) is coaxially fixedly connected to a second gear (34); a bottom end of the drive ring (6) is coaxially fixedly connected to a second inner gear ring (35); and the second inner gear ring (35) is capable of meshing with the second gear (34).

8. The transformer with a low-loss heat dissipation structure according to claim 4, characterized in that: An indicator arrow (36) is provided on the connecting disk (17), and the indicator arrow (36) is located between the first pushing block (20) and the fourth pushing block (23), and the tip of the indicator arrow (36) is used to point to the direction of wind.

9. The transformer with a low-loss heat dissipation structure according to claim 1, characterized in that: The housing (4) is evenly provided with a plurality of heat dissipation slots (37).

10. The transformer with a low-loss heat dissipation structure according to claim 5, characterized in that: The top surface of the top cover (25) is conical.

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