Rotary metal bipolar plate cleaning device

Abstract

The invention belongs to the technical field of metal bipolar plate cleaning, and particularly relates to a rotary metal bipolar plate cleaning device which comprises a cylindrical cage body, a plurality of to-be-cleaned metal bipolar plates are placed in the cylindrical cage body, and the plurality of to-be-cleaned metal bipolar plates are circumferentially arranged around the center of the cylindrical cage body; a supporting rod is fixedly connected to the center of the bottom of the cylindrical cage body, a central spraying pipe penetrates through the supporting rod, one end of the central spraying pipe penetrates through the center of the cylindrical cage body and is fixedly connected with a top spraying pipe, and the top spraying pipe is located above the cylindrical cage body; the supporting rod is connected with the driving assembly, and the driving assembly is used for driving the supporting rod to rotate; in the process that the driving assembly drives the supporting rod and the cylindrical cage body to rotate, cleaning liquid is conveyed to the top spraying pipe through the center spraying pipe, the cleaning liquid cleans the metal bipolar plate to be cleaned through the center spraying pipe and the top spraying pipe, cleaning dead corners are effectively eliminated, and uniform cleaning is achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of metal bipolar plate cleaning, and in particular relates to a rotary metal bipolar plate cleaning device. Background Art

[0002] Metal bipolar plates are key materials for preparing fuel cells and proton exchange membrane electrolyzers in the field of new energy. In order to avoid pollutants in the processing process affecting the subsequent coating process, metal bipolar plates must be cleaned before leaving the factory. As the flow channel structure of metal bipolar plates becomes more and more complex, simple ultrasonic immersion cleaning and rinsing often have poor effects, especially for the insufficient cleaning ability of welding smoke around the welds of bipolar plates, it is necessary to rinse and clean the bipolar plates. In order to ensure the cleaning effect: First, the cleaning liquid needs to be sprayed with a jet with a certain kinetic energy onto the surface of each bipolar plate. The cleaning liquid jet with kinetic energy can effectively peel off the dust and processing residues adsorbed on the surface of the bipolar plate. At the same time, the cleaning liquid jet can quickly wash away the mixture of dust and processing residues and cleaning liquid to avoid residue. Second, the cleaning liquid jet needs to contact every position of the bipolar plate to avoid cleaning dead corners. The cleaning liquid jet of the traditional metal bipolar plate cleaning device is relatively fixed relative to the bipolar plate, and can often only contact a local position on the surface of the bipolar plate, and the cleaning effect is not good. At the same time, when cleaning multiple bipolar plates, most traditional bipolar plate cleaning devices only allow the outer bipolar plates to be exposed to the cleaning liquid jet, and the cleaning effect on the middle bipolar plates is poor.

[0003] Patent CN108296206A provides a cleaning and storage tooling for fuel cell bipolar plates, in which the bipolar plates are placed vertically. After the cleaning liquid jet passes through the bipolar plates loaded on the periphery of the working condition, the impact force decreases rapidly, and the plates in the middle of the tooling cannot be fully cleaned; Patent CN117443839B provides a bipolar plate cleaning device, in which a cleaning nozzle sprays cleaning liquid from one end of the plate to clean the entire bipolar plate. For a curved flow channel structure, the flow channel surface facing away from the direction in which the cleaning liquid is sprayed is difficult to clean. Patents CN108296206A, CN220611665U and CN210435019U also have the same problem. CN218191293U provides a cleaning device for battery bipolar plates, in which the cleaning liquid nozzle of the device is a movable structure, and an adjustable brush plate is provided, and the brush plate is in direct contact with the surface of the bipolar plate for cleaning. However, in the device, a set of nozzles and brush plates can only process one side of a plate at a time, and the back of the bipolar plate still needs secondary cleaning, and the cleaning efficiency and equipment space utilization are very low.

[0004] From the analysis, it can be seen that how to clean multiple metal bipolar plates at the same time and ensure the cleaning effect of the metal bipolar plates is a technical problem that needs to be solved. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a rotary metal bipolar plate cleaning device, which can not only realize the simultaneous cleaning of multiple metal bipolar plates, but also clean the dead corners of the metal bipolar plates to ensure the cleaning effect.

[0006] The present invention is specifically implemented through the following technical solutions.

[0007] A rotary metal bipolar plate cleaning device comprises a cylindrical cage, the top of which is an open structure. The cylindrical cage has a receiving cavity inside, and the receiving cavity is used to place a plurality of metal bipolar plates to be cleaned. The plurality of metal bipolar plates to be cleaned are arranged circumferentially around the center of the receiving cavity.

[0008] A support rod is installed at the bottom center of the cylindrical cage body, and a central nozzle is passed through the support rod. One end of the central nozzle passes through the center of the accommodating chamber and is connected to a top nozzle, and the top nozzle is located above the metal bipolar plate to be cleaned; the part of the central nozzle located between the top nozzle and the center of the accommodating chamber is used to spray cleaning liquid to clean the metal bipolar plate to be cleaned along the radial direction of the accommodating chamber; the top nozzle is used to spray cleaning liquid to clean the metal bipolar plate to be cleaned from top to bottom along the axial direction of the accommodating chamber.

[0009] The support rod is also connected to a driving assembly, and the driving assembly is used to drive the support rod to rotate; when the cylindrical cage rotates with the support rod, the cleaning liquid cleans the metal bipolar plate to be cleaned in radial and axial directions respectively.

[0010] In a preferred embodiment of the present invention, a plurality of partitions are installed in the accommodating chamber, a metal bipolar plate to be cleaned is placed between two adjacent partitions, the partition is a frame structure, each of the frame structures includes a first side and a second side, one end of the first side is fixedly connected to one end of the second side, a plurality of first grooves are vertically and evenly opened on the inner wall of the accommodating chamber, a plurality of second grooves are radially opened on the bottom surface of the accommodating chamber at positions corresponding to the first grooves, the second grooves are connected to the corresponding first grooves, the first side is clamped in the first groove, the second side is clamped in the corresponding second groove, and a metal bipolar plate to be cleaned is placed between two adjacent partitions.

[0011] In a preferred embodiment of the present invention, a partition fixing plug is placed in the center of the accommodating cavity, and a plurality of third grooves are distributed on the outer wall of the partition fixing plug, each of the third grooves is connected to a corresponding second groove, and the frame structure also includes a third side, one end of the third side is fixedly connected to an end of the second side away from the first side, and the third side is clamped in the corresponding third groove.

[0012] In a preferred embodiment of the present invention, a second through hole is opened at the center of the accommodating cavity, a third through hole is opened at the center of the partition fixing plug, the third through hole is connected to the second through hole, and the central nozzle passes through the second through hole and the third through hole in sequence to be connected to the top nozzle.

[0013] In a preferred embodiment of the present invention, the top nozzle is a tube structure with closed ends, the top nozzle is perpendicular to the center nozzle, the middle part of the top nozzle is connected to the center nozzle, the length of the top nozzle is equal to the inner diameter of the cylindrical cage, and the first water spray holes are evenly opened on the side wall below the top nozzle.

[0014] In a preferred embodiment of the present invention, second water spray holes are evenly opened on the side wall of the portion of the central nozzle located between the top nozzle and the center of the accommodating chamber, and the second water spray holes are located above the partition fixing plug.

[0015] In a preferred embodiment of the present invention, first through holes are evenly distributed on the bottom surface of the accommodating cavity, and the cleaning liquid after cleaning is discharged from the accommodating cavity through the first through holes.

[0016] In a preferred embodiment of the present invention, the driving assembly includes a motor, a driving wheel, a driven wheel and a conveyor belt. The driven wheel is fixedly connected to the outer wall of the support rod. The driven wheel is connected to the driving wheel through a conveyor belt. The output shaft of the motor is fixedly connected to the driving wheel.

[0017] In a preferred embodiment of the present invention, a bearing seat is provided at the bottom of the support rod, a channel is vertically opened in the bearing seat, the bottom of the support rod is located in the channel, a bearing is arranged between the bottom of the support rod and the channel, and the central nozzle enters the interior of the support rod from the channel.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The device provided by the present invention arranges a plurality of metal bipolar plates to be cleaned in a circumferential direction, and rotates the metal bipolar plates during the cleaning process. During the rotation process, on the one hand, the cleaning liquid cleans the metal bipolar plates radially from the center, and on the other hand, the cleaning liquid cleans the metal bipolar plates downward from the top of the metal bipolar plates, so that each metal bipolar plate can be fully contacted with the cleaning liquid, avoiding cleaning dead corners, and improving the cleaning effect and cleaning efficiency. Specifically:

[0020] The device of the present invention comprises a cylindrical cage body, which has a containing cavity, in which a plurality of metal bipolar plates to be cleaned are placed, and the plurality of metal bipolar plates to be cleaned are arranged circumferentially around the center of the containing cavity; a support rod is fixedly connected to the bottom center of the cylindrical cage body, a central nozzle is passed through the support rod, one end of the central nozzle passes through the center of the containing cavity and is fixedly connected to a top nozzle, and the top nozzle is located above the metal bipolar plate to be cleaned; the portion of the central nozzle located between the top nozzle and the center of the containing cavity is used to spray cleaning liquid, and the metal bipolar plate to be cleaned is cleaned along the radial direction of the containing cavity; the top nozzle is used to spray cleaning liquid, and the metal bipolar plate to be cleaned is cleaned from top to bottom along the axial direction of the containing cavity. The cleaned metal bipolar plates are cleaned; the support rod is connected to the driving assembly, and the driving assembly is used to drive the support rod to rotate; as the cylindrical cage rotates with the support rod, the cleaning liquid cleans the metal bipolar plates to be cleaned in radial and axial directions respectively. Through cleaning in multiple directions, each metal bipolar plate can be fully contacted with the cleaning liquid, which can effectively eliminate the dead corners of the metal bipolar plates and achieve uniform cleaning. The bipolar plates are arranged circumferentially along the central nozzle and rotate during the cleaning process. The centrifugal force provided during the rotation process can also make it easier to remove dirt in the dead corners, thereby improving the cleaning effect and ensuring that each metal bipolar plate is fully cleaned. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of the rotary metal bipolar plate cleaning device provided by the present invention.

[0022] Figure 2 This is a perspective structural schematic diagram of the rotary metal bipolar plate cleaning device provided by the present invention.

[0023] Figure 3 A cross-sectional view of the rotary metal bipolar plate cleaning device provided by the present invention.

[0024] Figure 4 An exploded view (upper and lower isometric) of the rotary metal bipolar plate cleaning device provided by the present invention.

[0025] Figure 5 This is an exploded view (front view) of the rotary metal bipolar plate cleaning device provided by the present invention.

[0026] Figure 6 Schematic diagram of the process of assembling partitions in a cylindrical cage.

[0027] Description of reference numerals:

[0028] 1. Top nozzle, 2. Partition fixing plug, 3. Partition, 31. First side, 32. Second side, 33. Third side, 4. Cylindrical cage, 41. First groove, 42. Second groove, 5. Driven wheel, 6. Driving wheel, 7. Conveyor belt, 8. Support rod, 9. Bearing, 10. Bearing seat, 11. Center nozzle. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand and implement the technical solution of the present invention, the present invention is further described below in conjunction with specific embodiments and drawings, but the embodiments are not intended to limit the present invention.

[0030] The present invention provides a rotary metal bipolar plate cleaning device, such as Figure 1-Figure 5 As shown, it includes a cylindrical cage body 4, the top of which is an open structure. The cylindrical cage body has a containing cavity, in which a plurality of metal bipolar plates to be cleaned are placed, and the plurality of metal bipolar plates to be cleaned are arranged circumferentially around the center of the cylindrical cage body.

[0031] A support rod 8 is installed at the bottom center of the cylindrical cage body 4, and a central nozzle 11 is passed through the support rod 8. One end of the central nozzle 11 passes through the center of the accommodating cavity and is connected to a top nozzle 1. The top nozzle 1 is located above the cylindrical cage body 4; the support rod 8 is also connected to a driving assembly, and the driving assembly is used to drive the support rod 8 to rotate.

[0032] The portion of the central nozzle 11 located between the top nozzle 1 and the center of the accommodating chamber is used to spray cleaning liquid to clean the metal bipolar plate to be cleaned along the radial direction of the accommodating chamber; the top nozzle 1 is used to spray cleaning liquid to clean the metal bipolar plate to be cleaned from top to bottom along the axial direction of the accommodating chamber.

[0033] During the process of the driving assembly driving the support rod 8 and the cylindrical cage 4 to rotate, the cleaning liquid is transported to the top nozzle 1 through the central nozzle 11, and the cleaning liquid cleans the metal bipolar plate to be cleaned through the central nozzle 11 and the top nozzle 1. The cleaning liquid of the present invention cleans the metal bipolar plate to be cleaned in radial and axial directions respectively, and through cleaning in multiple directions, the dead angle of cleaning the metal bipolar plate can be effectively eliminated to achieve uniform cleaning. The bipolar plates are arranged circumferentially along the central nozzle, and rotate during the cleaning process, which can ensure that each bipolar plate is fully cleaned.

[0034] The device of the present invention has a simple assembly structure and can clean metal bipolar plates of various sizes. It can clean the metal bipolar plates independently and can also be arranged inside other bipolar plate cleaning equipment as a cleaning accessory to enhance the cleaning ability of the equipment.

[0035] During the rotation process, in order to ensure the stability of the metal bipolar plates to be cleaned, the metal bipolar plates do not interfere with each other, and ensure that each metal bipolar plate can be cleaned by the cleaning liquid, in a preferred embodiment of the present invention, the metal bipolar plates are also fixed, specifically as follows Figure 6 As shown, a plurality of partitions 3 are installed in the accommodating chamber, and the partitions 3 are frame structures, each of which includes a first side 31 and a second side 32, one end of the first side 31 and one end of the second side 32 are fixedly connected, a plurality of first grooves 41 are evenly opened vertically on the inner wall of the accommodating chamber, a plurality of second grooves 42 are radially opened on the bottom surface of the accommodating chamber, each second groove 42 is connected to a first groove 41, the first side 31 is clamped in the first groove 41, and the second side 32 is clamped in the corresponding second groove 42, and a metal bipolar plate to be cleaned is placed between two adjacent partitions 3. Through the above-mentioned clamping relationship, the partition 3 can be fixed and the mutual influence between the metal bipolar plates can be avoided. The purpose of setting the partition 3 as a frame structure is that during the rotation process, the cleaning liquid between the metal bipolar plates can shuttle between the metal bipolar plates under the action of centrifugal force, which plays a role in flushing stains and can also prevent liquid accumulation.

[0036] In order to further improve the fixing effect of the partition 3, in a preferred embodiment of the present invention, a partition fixing plug 2 is placed in the center of the accommodating cavity, and a plurality of third grooves are distributed on the outer wall of the partition fixing plug 2, and one of the third grooves is correspondingly connected to one of the second grooves 42, and the frame structure also includes a third side 33, one end of the third side 33 is fixedly connected to an end of the second side 32 away from the first side 31, and the third side 33 is clamped in the corresponding third groove.

[0037] A second through hole is provided at the center of the accommodating cavity, a third through hole is provided at the center of the partition fixing plug 2, the third through hole is connected to the second through hole, and the center nozzle 11 passes through the second through hole and the third through hole in sequence and is connected to the top nozzle 1. It is ensured that the cleaning liquid can be transported from the center to the center nozzle 11 and the top nozzle 1, so as to clean the bipolar plate in multiple directions. In a preferred embodiment of the present invention, the top nozzle 1 is a tube structure with closed ends, the top nozzle 1 is perpendicular to the center nozzle 11, the middle part of the top nozzle 1 is connected to the center nozzle 11, the length of the top nozzle 1 is equal to the cylindrical cage 4, and the first water spray holes are evenly provided below the top nozzle 1. During the rotation of the metal bipolar plate, the top nozzle 1 located at the top sprays the cleaning liquid downward through the first water spray hole to clean the bipolar plate, and the centrifugal force provided during the rotation process can also make the dirt in the dead corner easier to detach, thereby improving the cleaning effect. Setting the length of the top nozzle 1 to be equal to the inner diameter of the cylindrical cage 4 can ensure that the metal bipolar plate is fully in contact with the cleaning liquid in the axial direction, avoiding cleaning dead corners. In a preferred embodiment of the present invention, the side wall of the central nozzle 11 located in the cylindrical cage 4 is evenly provided with a second water spray hole, and more specifically, the side wall of the central nozzle 11 located between the top nozzle 1 and the center of the accommodating chamber is evenly provided with a second water spray hole, and the second water spray hole is located above the partition fixing plug 2. The bottom surface of the accommodating chamber is evenly distributed with first through holes, and the cleaning liquid after cleaning is discharged from the accommodating chamber through the first through holes to prevent liquid accumulation in the accommodating chamber.

[0038] In a preferred embodiment of the present invention, the driving assembly includes a motor, a driving wheel 6, a driven wheel 5 and a conveyor belt 7, the driven wheel 5 is fixedly connected to the outer wall of the support rod 8, the driven wheel 5 is transmission-connected to the driving wheel 6 through the conveyor belt 7, and the output shaft of the motor is fixedly connected to the driving wheel 6. When the motor is turned on, the motor drives the driving wheel 6 to rotate, and the driving wheel 6 drives the driven wheel 5 to rotate through the conveyor belt 7, thereby rotating the support rod 8 and the cylindrical cage 4. In a preferred embodiment of the present invention, a bearing 9 is fixedly connected to the bottom of the support rod 8, and the bearing 9 is installed in a bearing seat 10. A channel is vertically opened in the bearing seat 10, and the bottom of the support rod 8 is located in the channel, and the central nozzle 11 enters the interior of the support rod 8 from the channel. The bearing seat 10 and the bearing 9 ensure the stability of the rotation process.

[0039] like Figure 6 As shown, the assembly method of the device of the present invention includes: first inserting the partition 3 into the cage along the second groove 42 and the first groove 41 on the cylindrical cage 4; after all the partitions 3 are inserted in the above manner, the partition fixing plug 2 is placed in the center of the cylindrical cage 4, and when it is placed, the front end of the partition 3 (i.e., the third side 33) is embedded in the corresponding third groove on the circumference of the partition fixing plug 2, which plays a role in fixing the partition 3. Then Figure 5 As shown in the figure, the device is assembled according to the following steps: (1) The central nozzle 11 is passed through the central hole of the bearing seat 10, the bearing 9, the support rod 8, the transmission belt 7, the driven wheel 5, the cylindrical cage 4 and the partition fixing plug 2 in sequence (specifically, the second through hole and the third through hole mentioned above), so that the lowest position of the second water spray hole on it is higher than the partition fixing plug 2 (such as Figure 4 (2) connecting the top nozzle 1 to the top of the center nozzle 11; (3) connecting the driven wheel 5 to the support rod 8 (as shown in FIG. Figure 4 (4) Connect the bearing 9 to the support rod 8 (as shown); Figure 4 (5) Connect the cylindrical cage 4 to the top of the support rod 8. The assembled device is as shown in FIG. Figure 1 shown.

[0040] During cleaning, first put the metal bipolar plate into the wedge-shaped space separated by the partition 3 inside the cylindrical cage 4; the driving wheel 6 rotates to drive the driven wheel 5 to rotate, and drives the entire cylindrical cage 4 to rotate through the support rod 8; the cleaning liquid is introduced from the bottom of the central nozzle 11 and moves along the central hole of the central nozzle 11 to the top nozzle 1. In this process, the small circular holes on the central nozzle 11 and the top nozzle 1 spray the cleaning liquid jet to clean the bipolar plate in the cylindrical cage 4. During the cleaning process, the speed and direction of rotation of the driving wheel 6 can be adjusted to control the speed and direction of rotation of the cylindrical cage 4 so that the plates can be fully cleaned. The cleaning is completed after several minutes of cleaning.

[0041] The device of the present invention can also be used as a bipolar plate cleaning container with a rotating capability and arranged in other equipment with a spray cleaning capability, and the cleaning effect can be further enhanced by combining the spray capability of the cleaning equipment itself.

[0042] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, they are also intended to be included.

Claims

1. A rotary metal bipolar plate cleaning device, characterized in that: It comprises a cylindrical cage body (4), the top of the cylindrical cage body (4) is an open structure, the cylindrical cage body (4) has a containing cavity inside, the containing cavity is used to place a plurality of metal bipolar plates to be cleaned, and the plurality of metal bipolar plates to be cleaned are arranged circumferentially around the center of the containing cavity; A support rod (8) is installed at the bottom center of the cylindrical cage body (4), a central nozzle (11) is inserted into the support rod (8), one end of the central nozzle (11) passes through the center of the accommodating chamber and is connected to the top nozzle (1), and the top nozzle (1) is located above the metal bipolar plate to be cleaned; the part of the central nozzle (11) located between the top nozzle (1) and the center of the accommodating chamber is used to spray cleaning liquid to clean the metal bipolar plate to be cleaned along the radial direction of the accommodating chamber; the top nozzle (1) is used to spray cleaning liquid to clean the metal bipolar plate to be cleaned from top to bottom along the axial direction of the accommodating chamber; The support rod (8) is also connected to a driving assembly, and the driving assembly is used to drive the support rod (8) to rotate; when the cylindrical cage (4) rotates with the support rod (8), the cleaning liquid cleans the metal bipolar plate to be cleaned in the radial and axial directions respectively.

2. The rotary metal bipolar plate cleaning device according to claim 1, characterized in that: A plurality of partitions (3) are arranged in the accommodating chamber, a metal bipolar plate to be cleaned is placed between two adjacent partitions (3), the partition (3) is a frame structure, the frame structure comprises a first side edge (31) and a second side edge (32), one end of the first side edge (31) is fixedly connected to one end of the second side edge (32), a plurality of first grooves (41) are evenly and vertically formed on the inner wall of the accommodating chamber, a plurality of second grooves (42) are radially formed on the bottom surface of the accommodating chamber at positions corresponding to the first grooves (41), the second grooves (42) are connected to the corresponding first grooves (41), the first side edge (31) is clamped in the first groove (41), and the second side edge (32) is clamped in the corresponding second groove (42).

3. The rotary metal bipolar plate cleaning device according to claim 2, characterized in that: A partition fixing plug (2) is placed at the center of the accommodating cavity, and a plurality of third grooves are distributed on the outer wall of the partition fixing plug (2), and one of the third grooves is correspondingly connected to one of the second grooves (42). The frame structure also includes a third side (33), and one end of the third side (33) is fixedly connected to an end of the second side (32) away from the first side (31), and the third side (33) is clamped in the corresponding third groove.

4. The rotary metal bipolar plate cleaning device according to claim 3, characterized in that: A second through hole is provided at the center of the accommodating cavity, a third through hole is provided at the center of the partition fixing plug (2), the third through hole is connected to the second through hole, and the center nozzle (11) passes through the second through hole and the third through hole in sequence to be connected to the top nozzle (1).

5. The rotary metal bipolar plate cleaning device according to claim 1, characterized in that: The top nozzle (1) is a tube structure with closed ends. The top nozzle (1) is perpendicular to the center nozzle (11). The middle of the top nozzle (1) is connected to the center nozzle (11). The length of the top nozzle (1) is equal to the inner diameter of the cylindrical cage (4). The side wall below the top nozzle (1) is evenly provided with first water spray holes.

6. The rotary metal bipolar plate cleaning device according to claim 3, characterized in that: The central nozzle (11) is evenly provided with second water spray holes on the side wall between the top nozzle (1) and the center of the accommodating chamber, and the second water spray holes are located above the partition fixing plug (2).

7. The rotary metal bipolar plate cleaning device according to claim 1, characterized in that: The bottom surface of the accommodating cavity is evenly distributed with first through holes, and the cleaning liquid after cleaning is discharged from the accommodating cavity through the first through holes.

8. The rotary metal bipolar plate cleaning device according to claim 1, characterized in that: The driving assembly comprises a motor, a driving wheel (6), a driven wheel (5) and a conveyor belt (7); the driven wheel (5) is mounted on the outer wall of the support rod (8); the driven wheel (5) is transmission-connected to the driving wheel (6) via the conveyor belt (7); and the output shaft of the motor is fixedly connected to the driving wheel (6).

9. The rotary metal bipolar plate cleaning device according to claim 1, characterized in that: A bearing seat (10) is provided at the bottom of the support rod (8), a channel is vertically opened in the bearing seat (10), the bottom of the support rod (8) is located in the channel, a bearing is arranged between the bottom of the support rod (8) and the channel, and the central nozzle (11) enters the interior of the support rod (8) from the channel.

Images