Fly ash flue gas wet desalination device
By designing a fly ash flue gas wet desalting device with automatic loading and discharge functions, the problem of secondary operation of the existing device is solved, and a convenient fly ash treatment process is achieved.
Patent Information
- Application Number
- CN202411306196.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-19
- Publication Date
- 2025-02-14
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
During the operation of the existing fly ash desalination device, staff need to perform secondary operations to discharge and load fly ash, resulting in inconvenience in use.
A flying ash smoke wet desalting device is designed. The feeding seat is driven to slide back and forth on the supporting plate through the rotating bearing shaft, so that the fly ash in the hopper is automatically loaded into the filter screen, and the cover is driven by the spring body. Move down to achieve automatic discharge of fly ash after desalting.
It realizes the dual role of loading and discharging of materials in one operation, simplifies the operating process of staff and improves the convenience of equipment.
Smart Images
Figure CN119426341A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of cement, and in particular to a fly ash and flue gas wet desalination device. Background Art
[0002] There are many methods for fly ash desalination, among which wet desalination is a commonly used technology. Wet desalination is to wash fly ash with water or aqueous solution, dissolve soluble salts in water and separate them. After desalination, the chemical composition of fly ash is similar to that of cement raw materials, and it can replace part of cement raw materials for production. Specifically, calcium oxide, silicon dioxide and aluminum oxide in fly ash are the main mineral components required for cement production. In addition, desalination can also remove harmful substances in fly ash and reduce the negative impact on the cement production process.
[0003] When the existing desalination device desalinates the fly ash, after the fly ash is desalinated, the staff needs to open the device to discharge the fly ash, and then add the fly ash to be treated into the device for desalination treatment. The discharge and loading process requires the staff to perform secondary operations, which causes inconvenience in use. Summary of the invention
[0004] The purpose of the present invention is to solve the shortcomings of the background technology and to propose a fly ash and flue gas wet desalination device.
[0005] To achieve the above objectives, the technical solution adopted by the present invention is: a fly ash and flue gas wet desalination device, comprising a frame, a desalting component is arranged at the front end of the frame, a sealing cover is elastically installed through the lower end of the desalting component, a supporting plate is connected to the upper end of the desalting component, a feeding seat is fitted and installed at the middle part of the upper end of the supporting plate and at the edge of one side of the upper end of the supporting plate, a hopper is fitted and installed at the upper end of the feeding seat, a bearing shaft is installed at the front end of the frame, the feeding seat is connected to the bearing shaft, the lower end of the bearing shaft is connected to a pushing member, the end of the pushing member is connected to a guide rail, a cover frame is fixedly installed at the lower end of the sealing cover, a guide wheel is connected to the lower end of the cover frame, the guide wheel is fitted to the upper end of the guide rail, and a removing plate is fixedly installed at the end of the guide rail.
[0006] Preferably, the desalination element includes a shell installed at the front end of the frame, a filter is coaxially installed inside the shell, the filter passes through the upper end of the shell, the upper end of the filter is rotatably connected to the supporting plate, the cover passes through the lower end of the shell and extends into the interior of the filter, and the cover is tightly attached to the filter and the shell.
[0007] Preferably, a plurality of protrusions are evenly distributed and extended on the inner surface of the filter, an upper portion of one side of the shell is fixedly connected to a water inlet pipe, a lower portion of one side of the shell is fixedly connected to a water outlet pipe, a square guide frame is fixedly installed at the rear end of the shell, a square guide shell is fixedly installed at the end of the cover frame, the square guide frame is slidably installed inside the square guide shell, a spring body is fixedly installed at the end of the cover frame, the square guide frame and the square guide shell pass through the interior of the spring body, and the end of the spring body is fixed to the end of the square guide frame.
[0008] Preferably, a No. 2 pulley is coaxially inlaid on the outer surface of the filter, and the No. 2 pulley is located above the shell, and a No. 2 servo motor is fixedly installed on the inner upper part of the frame, and a No. 1 pulley is coaxially fixedly installed on the output end of the No. 2 servo motor, and a synchronous belt is connected between the No. 1 pulley and the No. 2 pulley, and a supporting frame is fixedly installed on the rear end of the shell, and the rear end of the supporting frame is fixed to the frame, a wheel frame extends from the lower end of the cover frame, and the guide wheel is installed at the end of the wheel frame.
[0009] Preferably, the support plate and the hopper are both fixed to the supporting frame, the supporting shaft passes through and is rotatably installed on the end of the supporting frame, a No. 1 servo motor is fixedly installed on the upper end of the supporting shaft, and the No. 1 servo motor is fixed to the supporting frame, and a seat frame is fixedly installed at the rear end of the feeding seat, and the end of the seat frame is fixed to the supporting shaft.
[0010] Preferably, the pushing member includes a sliding seat fixedly mounted on the rear end of the guide rail, a tooth plate fixedly mounted on the rear end of the sliding seat, the tooth plate being connected to the load-bearing shaft, guide rods slidably mounted through both ends of the sliding seat, a connecting frame fixedly mounted on the end of the guide rod, and the connecting frame being fixed to the lower end of the load-bearing frame.
[0011] Preferably, a No. 1 connecting shaft is rotatably installed through the lower front end of the carrier frame, and one end of the No. 1 connecting shaft and the lower end of the carrier shaft are coaxially inlaid with helical gears, and the two helical gears are meshed with each other. A No. 2 connecting shaft is arranged below the No. 1 connecting shaft, and the No. 2 connecting shaft is rotatably installed on the carrier frame, and the other end of the No. 1 connecting shaft is coaxially inlaid with a No. 2 large gear, and one end of the No. 2 connecting shaft is coaxially inlaid with a No. 1 small gear, and the No. 1 small gear is meshed with the No. 2 large gear.
[0012] Preferably, a large gear No. 1 is coaxially embedded in the other end of the No. 2 connecting shaft, a No. 3 connecting shaft is arranged below the No. 2 connecting shaft, the No. 3 connecting shaft is rotatably installed on the supporting frame, and a small gear No. 2 is coaxially embedded in the end of the No. 3 connecting shaft, the upper part of the No. 2 small gear is meshed with the large gear No. 1, and the lower part of the No. 2 small gear is meshed with the gear plate.
[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. The two feeding seats are driven by the rotating bearing shaft to slide back and forth on the supporting plate continuously, so that when the through hole on the feeding seat moves to the hopper, the fly ash in the hopper can fall into the through hole of the feeding seat. When the feeding seat moves to the middle of the supporting plate, the fly ash in the through hole of the feeding seat can fall through the through hole on the supporting plate and fall into the filter to complete the loading. In this process, the bearing shaft will also drive the tooth plate to move through gears and other components, and then drive the guide rail to move. At this time, the guide wheel rolls on the guide rail. When the guide wheel rolls to the inclined section of the guide rail, the spring body will press the cover to move the cover down, so that the fly ash after desalination in the filter can fall and be discharged, so as to achieve the dual functions of loading and discharging in one operation, which effectively facilitates the operation and use of the staff.
[0014] 2. When the guide rail moves, it will also drive the stripping plate to move synchronously, so that after the cover is moved down and the guide wheel rolls along the middle horizontal section of the guide rail, the stripping plate can push the fly ash accumulated on the No. 2 pulley, so that the fly ash can fully fall down and be discharged, thereby ensuring the discharge effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a structural schematic diagram of a fly ash and flue gas wet desalination device of the present invention; Figure 2 It is a rear view of a fly ash and flue gas wet desalination device of the present invention; Figure 3 It is a schematic diagram of a support plate of a fly ash and flue gas wet desalination device of the present invention; Figure 4 It is a schematic diagram of the first large gear of a fly ash and flue gas wet desalination device of the present invention; Figure 5 It is a schematic diagram of a tooth plate of a fly ash and flue gas wet desalination device of the present invention; Figure 6 The figure is an internal view of a shell of a fly ash and flue gas wet desalination device according to the present invention.
[0016] In the figure: 1, frame; 2, servo motor No. 1; 3, hopper; 4, feed seat; 5, support plate; 6, housing; 7, water inlet pipe; 8, bearing shaft; 9, bevel gear; 10, water outlet pipe; 11, large gear No. 1; 12, tooth plate; 13, servo motor No. 2; 14, pulley No. 1; 15, synchronous belt; 16, pulley No. 2; 17, large gear No. 2; 18, bearing frame; 19, seat frame; 20. Connecting shaft No. 1; 21. Pinion No. 1; 22. Connecting shaft No. 2; 23. Pinion No. 2; 24. Connecting shaft No. 3; 25. Guide rod; 26. Connecting frame; 27. Slide seat; 28. Wheel frame; 29. Guide wheel; 30. Guide rail; 31. Stripping plate; 32. Cover frame; 33. Square guide frame; 34. Square guide shell; 35. Spring body; 36. Cover; 37. Filter screen; 38. Lug. DETAILED DESCRIPTION
[0017] 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.
[0018] like Figure 1-Figure 6 The fly ash flue gas wet desalination device shown in the figure comprises a frame 1, a desalting component is arranged at the front end of the frame 1, a sealing cover 36 is elastically installed through the lower end of the desalting component, a supporting plate 5 is connected to the upper end of the desalting component, and the supporting plate 5 plays the role of supporting the fly ash in the through hole of the feeding seat 4. The feeding seat 4 is fitted and installed at the middle part of the upper end of the supporting plate 5 and the edge of one side of the upper end of the supporting plate 5. The through hole on the feeding seat 4 can carry the fly ash in the hopper 3. The fly ash is received and slides on the supporting plate 5 through the feeding seat 4 to push the fly ash to the middle of the supporting plate 5 and fall into the filter screen 37. The upper end of the feeding seat 4 is fitted with the hopper 3. The front end of the frame 1 is equipped with a bearing shaft 8. The feeding seat 4 is connected with the bearing shaft 8. The bearing shaft 8 drives the feeding seat 4 to rotate back and forth. The lower end of the bearing shaft 8 is connected with a pusher. The end of the pusher is connected with a guide rail 30. The guide rail 30 can drive the cover 36 The cover 36 is fixedly mounted with a cover frame 32 at its lower end, and a guide wheel 29 is connected to the lower end of the cover frame 32. The cover frame 32 serves as a connection, and the guide wheel 29 is fitted to the upper end of the guide rail 30. The guide wheel 29 serves to reduce wear, and a removal plate 31 is fixedly mounted at the end of the guide rail 30. The removal plate 31 serves to remove fly ash from the cover 36. The rotating bearing shaft 8 will drive the feeding seat 4 to slide on the supporting plate 5, so that one of the feeding seats 4 moves to the bottom of the hopper 3, so that the fly ash in the hopper 3 can fall into the through hole of the feeding seat 4, and the other feeding seat 4 moves to the middle of the supporting plate 5, so that the fly ash in the through hole of the other feeding seat 4 can fall to pass through the through hole on the supporting plate 5 and fall into the filter screen 37 for loading. Then the bearing shaft 8 is reversed, driving the above-mentioned two feeding seats 4 to move in the opposite direction, thereby cyclically passing through the two feeding seats 4 for alternating loading.
[0019] The desalination component includes a shell 6 installed at the front end of the frame 1, and a filter screen 37 is coaxially installed inside the shell 6. The shell 6 supports the filter screen 37. The filter screen 37 extends from the upper end of the shell 6, and the upper end of the filter screen 37 is rotatably connected to the supporting plate 5. The filter screen 37 blocks the fly ash. The cover 36 extends through the lower end of the shell 6 and extends into the interior of the filter screen 37. The cover 36 is tightly attached to the filter screen 37 and the shell 6, and the cover 36 seals the filter screen 37 and the shell 6.
[0020] A plurality of convex pieces 38 are evenly distributed and extended on the inner surface of the filter screen 37. The convex pieces 38 can rotate driven by the filter screen 37 to stir the water and fly ash so that the soluble salts in the fly ash can be fully dissolved in the water. An upper part of one side of the shell body 6 is fixedly connected to a water inlet pipe 7, and a lower part of one side of the shell body 6 is fixedly connected to a water outlet pipe 10. A square guide frame 33 is fixedly installed at the rear end of the shell body 6, and a square guide shell 34 is fixedly installed at the end of the cover frame 32. The square guide frame 33 can slide in the square guide shell 34 to guide the cover 36. The square guide frame 33 is slidably installed inside the square guide shell 34. A spring body 35 is fixedly installed at the end of the cover frame 32. The square guide frame 33 and the square guide shell 34 pass through the inside of the spring body 35. The spring body 35 can press the cover frame 32 so that the guide wheel 29 on the cover frame 32 can always contact the guide rail 30. The end of the spring body 35 is fixed to the end of the square guide frame 33.
[0021] The outer surface of the filter 37 is coaxially inlaid with a No. 2 pulley 16, and the No. 2 pulley 16 is located above the shell 6. The No. 1 pulley 14 and the No. 2 pulley 16 serve to connect the synchronous belt 15. The No. 2 servo motor 13 is fixedly installed on the inner upper part of the frame 1, and the No. 2 servo motor 13 serves to drive the filter 37 to rotate. The No. 1 pulley 14 is coaxially fixedly installed on the output end of the No. 2 servo motor 13, and the synchronous belt 15 is connected between the No. 1 pulley 14 and the No. 2 pulley 16. The rear end of the shell 6 is fixedly installed with a bearing frame 18, and the synchronous belt 15 serves as a transmission. The rear end of the bearing frame 18 is fixed to the frame 1, and a wheel frame 28 extends from the lower end of the cover frame 32. The guide wheel 29 is installed at the end of the wheel frame 28, and the wheel frame 28 serves to carry the guide wheel 29.
[0022] The supporting plate 5 and the hopper 3 are both fixed to the supporting frame 18, the supporting shaft 8 passes through and is rotatably installed on the end of the supporting frame 18, a No. 1 servo motor 2 is fixedly installed on the upper end of the supporting shaft 8, and the No. 1 servo motor 2 drives the supporting shaft 8 to rotate reciprocatingly, and the No. 1 servo motor 2 is fixed to the supporting frame 18. A seat frame 19 is fixedly installed on the rear end of the feeding seat 4, and the end of the seat frame 19 is fixed to the supporting shaft 8, and the seat frame 19 fixes the feeding seat 4 and the supporting shaft 8 together.
[0023] The pushing member includes a slide 27 fixedly installed on the rear end of the guide rail 30, and a tooth plate 12 is fixedly installed on the rear end of the slide 27. The slide 27 and the guide rod 25 can guide the tooth plate 12. The tooth plate 12 is connected to the load-bearing shaft 8. Guide rods 25 are slidably installed on both ends of the slide 27. A connecting frame 26 is fixedly installed on the end of the guide rod 25. The connecting frame 26 serves to fix the guide rod 25, and the connecting frame 26 is fixed to the lower end of the load-bearing frame 18.
[0024] A No. 1 connecting shaft 20 is rotatably installed through the lower front end of the carrier frame 18, and the No. 1 connecting shaft 20 plays a transmission role. One end of the No. 1 connecting shaft 20 and the lower end of the load-bearing shaft 8 are coaxially inlaid with a bevel gear 9, and the two bevel gears 9 are meshed. The bevel gear 9 plays the role of connecting the No. 1 connecting shaft 20 and the load-bearing shaft 8 together. A No. 2 connecting shaft 22 is arranged below the No. 1 connecting shaft 20, and the No. 2 connecting shaft 22 is rotatably installed on the carrier frame 18, and the No. 2 connecting shaft 22 plays a transmission role. The other end of the No. 1 connecting shaft 20 is coaxially inlaid with a No. 2 large gear 17, and one end of the No. 2 connecting shaft 22 is coaxially inlaid with a No. 1 small gear 21, the No. 1 small gear 21 is meshed with the No. 2 large gear 17, and the No. 1 small gear 21 and the No. 2 large gear 17 play the role of accelerating the rotation of the No. 2 connecting shaft 22.
[0025] The other end of the No. 2 connecting shaft 22 is coaxially inlaid with the No. 1 large gear 11, and a No. 3 connecting shaft 24 is arranged below the No. 2 connecting shaft 22. The No. 3 connecting shaft 24 plays a transmission role. The No. 3 connecting shaft 24 is rotatably installed on the carrier 18. The end of the No. 3 connecting shaft 24 is coaxially inlaid with the No. 2 small gear 23. The upper part of the No. 2 small gear 23 is meshed with the No. 1 large gear 11. The No. 2 small gear 23 and the No. 1 large gear 11 can further accelerate the rotation of the No. 3 connecting shaft 24, so that the moving distance of the tooth plate 12 pushed by the No. 2 small gear 23 is extended to adapt to the required moving distance of the guide rail 30, and the lower part of the No. 2 small gear 23 is meshed with the tooth plate 12.
[0026] During desalination, fly ash is added to the filter screen 37. At this time, water enters the housing 6 through the water inlet pipe 7 to wash the fly ash in the filter screen 37 and dissolve the soluble salts in the fly ash in the water. Then the water is discharged through the outlet pipe 10 to complete the desalination of the fly ash. Then the first servo motor 2 drives the bearing shaft 8 to rotate, so that the bearing shaft 8 drives the tooth plate 12 to move through the gear and other components, thereby driving the guide rail 30 and the removal plate 31 to move. At this time, the guide wheel 29 The guide wheel 29 rolls on the guide rail 30. When the guide wheel 29 rolls to the inclined section of the guide rail 30, the spring body 35 presses the cover 36 to move the cover 36 downward, so that the fly ash after desalination in the filter screen 37 can fall and be discharged. During this process, the guide rail 30 continues to move, and the guide wheel 29 rolls in contact with the horizontal section in the middle of the guide rail 30. At the same time, the material removal plate 31 moves synchronously to scrape the upper end surface of the cover 36 after it moves downward, so as to push down the fly ash accumulated on the cover 36. When the wheel 29 is about to roll to another inclined section of the guide rail 30, the material removal plate 31 just leaves the top of the cover 36, and then the guide wheel 29 rolls on the other inclined section of the guide rail 30 to drive the cover 36 to move up and reset, so as to re-seal the shell 6 and the filter screen 37. In this process, the rotating bearing shaft 8 will drive the feeding seat 4 to move toward the middle of the supporting plate 5, that is, when the cover 36 is reset, the feeding seat 4 just moves close to the middle area of the supporting plate 5, and then the bearing shaft 8 continues to drive The movable guide rail 30 and the feeding seat 4 move, and at this time the guide wheel 29 rolls in contact with the horizontal section at the end of the guide rail 30, so that the reset cover 36 remains stationary, and at the same time the feeding seat 4 moves to the middle area of the supporting plate 5, so that the fly ash in the through hole of the feeding seat 4 can fall through the through hole on the supporting plate 5 and fall into the filter screen 37 for loading, and then water can be added through the water inlet pipe 7 to desalinate the fly ash, and then the desalted fly ash can be used as cement raw material for cement production.
[0027] 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 fly ash and flue gas wet desalination device, comprising a frame (1), characterized in that: A desalting component is arranged at the front end of the frame (1); a sealing cover (36) is elastically installed through the lower end of the desalting component; a supporting plate (5) is connected to the upper end of the desalting component; a feeding seat (4) is fitted and installed at the middle part of the upper end of the supporting plate (5) and at the edge of one side of the upper end of the supporting plate (5); a hopper (3) is fitted and installed at the upper end of the feeding seat (4); a bearing shaft (8) is arranged at the front end of the frame (1); the feeding seat (4) is connected to the bearing shaft (8); a pushing member is connected to the lower end of the bearing shaft (8); a guide rail (30) is connected to the end of the pushing member; a cover frame (32) is fixedly installed at the lower end of the sealing cover (36); a guide wheel (29) is connected to the lower end of the cover frame (32); the guide wheel (29) is fitted to the upper end of the guide rail (30); a material removal plate (31) is fixedly installed at the end of the guide rail (30).
2. A fly ash and flue gas wet desalination device according to claim 1, characterized in that: The desalination element comprises a shell (6) mounted at the front end of the frame (1); a filter screen (37) is coaxially rotatably mounted inside the shell (6); the filter screen (37) extends through the upper end of the shell (6); the upper end of the filter screen (37) is rotatably connected to a support plate (5); the cover (36) extends through the lower end of the shell (6) and extends into the interior of the filter screen (37); the cover (36) is tightly attached to the filter screen (37) and the shell (6).
3. A fly ash and flue gas wet desalination device according to claim 2, characterized in that: The inner surface of the filter screen (37) is evenly distributed with a plurality of protruding pieces (38). An upper portion of one side of the shell (6) is fixedly connected to a water inlet pipe (7). A lower portion of one side of the shell (6) is fixedly connected to a water outlet pipe (10). A square guide frame (33) is fixedly mounted at the rear end of the shell (6). A square guide shell (34) is fixedly mounted at the end of the cover frame (32). The square guide frame (33) is slidably mounted inside the square guide shell (34). A spring body (35) is fixedly mounted at the end of the cover frame (32). The square guide frame (33) and the square guide shell (34) penetrate the interior of the spring body (35). The end of the spring body (35) is fixedly mounted to the end of the square guide frame (33).
4. A fly ash and flue gas wet desalination device according to claim 2, characterized in that: A second pulley (16) is coaxially inlaid on the outer surface of the filter screen (37), and the second pulley (16) is located above the shell (6). A second servo motor (13) is fixedly mounted on the inner upper part of the frame (1). A first pulley (14) is coaxially fixedly mounted on the output end of the second servo motor (13). A synchronous belt (15) is connected between the first pulley (14) and the second pulley (16). A bearing frame (18) is fixedly mounted on the rear end of the shell (6), and the rear end of the bearing frame (18) is fixed to the frame (1). A wheel frame (28) extends from the lower end of the cover frame (32), and the guide wheel (29) is mounted on the end of the wheel frame (28).
5. A fly ash and flue gas wet desalination device according to claim 4, characterized in that: The support plate (5) and the hopper (3) are both fixed to the support frame (18); the support shaft (8) passes through and is rotatably mounted on the end of the support frame (18); a No. 1 servo motor (2) is fixedly mounted on the upper end of the support shaft (8); the No. 1 servo motor (2) is fixed to the support frame (18); a seat frame (19) is fixedly mounted on the rear end of the feeding seat (4); and an end of the seat frame (19) is fixed to the support shaft (8).
6. A fly ash and flue gas wet desalination device according to claim 4, characterized in that: The pushing member comprises a slide seat (27) fixedly mounted on the rear end of the guide rail (30); a tooth plate (12) is fixedly mounted on the rear end of the slide seat (27); the tooth plate (12) is connected to the bearing shaft (8); guide rods (25) are slidably mounted through both ends of the slide seat (27); a connecting frame (26) is fixedly mounted on the end of the guide rod (25); and the connecting frame (26) is fixed to the lower end of the bearing frame (18).
7. A fly ash and flue gas wet desalination device according to claim 6, characterized in that: A first connecting shaft (20) is rotatably mounted through the lower front end of the carrier frame (18), one end of the first connecting shaft (20) and the lower end of the carrier shaft (8) are coaxially inlaid with a bevel gear (9), and the two bevel gears (9) are meshed with each other. A second connecting shaft (22) is arranged below the first connecting shaft (20), and the second connecting shaft (22) is rotatably mounted on the carrier frame (18), the other end of the first connecting shaft (20) is coaxially inlaid with a second large gear (17), and one end of the second connecting shaft (22) is coaxially inlaid with a first small gear (21), and the first small gear (21) is meshed with the second large gear (17).
8. The fly ash and flue gas wet desalination device according to claim 7, characterized in that: The other end of the No. 2 connecting shaft (22) is coaxially inlaid with a No. 1 large gear (11), and a No. 3 connecting shaft (24) is arranged below the No. 2 connecting shaft (22). The No. 3 connecting shaft (24) is rotatably mounted on the carrier frame (18), and a No. 2 small gear (23) is coaxially inlaid at the end of the No. 3 connecting shaft (24). The upper part of the No. 2 small gear (23) is meshed with the No. 1 large gear (11), and the lower part of the No. 2 small gear (23) is meshed with the gear plate (12).