Commercial water purifier capable of deeply purifying

Abstract

The invention discloses a commercial water purifier capable of deep purification, and belongs to the field of water purification and filtration, the commercial water purifier comprises a machine barrel, the left end of the machine barrel is communicated with a water inlet cylinder, the right end of the machine barrel is communicated with a first sewage discharge cylinder, a partition plate is fixed in the machine barrel, the middle of the partition plate is rotatably connected with a connecting piece, and a first filter cylinder is fixed on the left side of the connecting piece; a second filter cylinder is fixed to the right side of the connecting piece, the right end of the second filter cylinder is rotationally connected with the right side of the interior of the machine barrel, and an open groove is formed in the lower portion of the outer surface of the machine barrel in a penetrating mode and located below the second filter cylinder. Meanwhile, the filter drum rotates under the meshing influence of the rack and the gear ring, so that the outlet position and direction of water flow can be changed, the filter materials at all parts of the filter drum II can fully participate in filtering, the excessive use of local filter materials is avoided, the overall service life of the filter drum II is prolonged, and the stability of the filtering effect is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of water purification filtration, and particularly to a commercial water purifier capable of deep purification. Background Art

[0002] In commercial scenarios, there are high requirements for the purification effect and stability of water purifiers. Since the outlet position of traditional water purifiers is fixed, it is easy to cause excessive local filtration pressure in the filter cartridge, resulting in serious local blockage, affecting the overall filtration effect and service life. Moreover, the cleaning and maintenance of the filter cartridge are relatively difficult. Manual cleaning is not only time-consuming and laborious, but may also reduce the water quality due to untimely cleaning. In addition, the accumulation of impurities in water on the surface and inside of the filter cartridge will affect the water flow rate and purification efficiency. Therefore, it is of great practical significance to develop a commercial water purifier that can deeply purify, achieve uniform filtration and is convenient for automatic cleaning and maintenance. Summary of the Invention

[0003] Aiming at the deficiencies of the prior art, the present invention provides a commercial water purifier capable of deep purification, which solves the problems raised in the above background art.

[0004] Technical Solution: To solve the above technical problems, according to one aspect of the present invention, more specifically, a commercial water purifier capable of deep purification includes a machine barrel. The left end of the machine barrel is communicated with a water inlet barrel, the right end of the machine barrel is communicated with a first sewage discharge barrel, a partition is fixed inside the machine barrel, a connecting piece is rotatably connected to the middle of the partition, a first filter cartridge is fixed to the left side of the connecting piece, a second filter cartridge is fixed to the right side of the connecting piece, the right end of the second filter cartridge is rotatably connected to the right side inside the machine barrel, a slot is penetrated and opened in the lower part of the outer surface of the machine barrel, the slot is located below the second filter cartridge, sliding grooves are opened on both the left and right sides inside the slot, a sliding plate is slidably connected to the inside of the two sliding grooves, a water outlet pipe is penetrated and connected to the inside of the sliding plate, a toothed ring is fixed to the outer surface of the water outlet pipe inside the sliding plate, a rack is slidably connected to the inside of the sliding plate, the rack is meshed with the toothed ring, the left end of the rack is fixed to the inside of the sliding groove, a transmission rod is threadedly connected to the left side inside the sliding plate, the left end of the transmission rod is rotatably connected to the inside of the sliding groove, a worm gear is meshed with the outer surface of the transmission rod, the top of the worm gear penetrates to the inside of the machine barrel and is fixed with a first helical gear, the first helical gear is meshed with a second helical gear on the right side, a spur gear is fixed to the right side of the second helical gear, and the spur gear is rotatably connected to the lower left side of the left side of the partition.

[0005] Furthermore, an inner frame is fixed inside the connecting piece, a lead screw is threadedly connected to the inside of the inner frame, a sewage discharge pipe is fixed to the right end of the lead screw inside the second filter cartridge, a plurality of sewage suction nozzles are communicated with the outer surface of the sewage discharge pipe, the right end of the sewage discharge pipe is located inside the first sewage discharge barrel and is fixed with a piston block, and a sewage pump is communicated with the lower part of the outer surface of the first sewage discharge barrel; A support is fixed inside the water inlet cylinder. An impeller is rotatably connected to the left side of the support. The right end of the impeller penetrates to the right side of the support and is fixed with an incomplete gear. Vertical rods are rotatably connected to the upper and lower sides of the left side inside the machine barrel. Bevel gears III are fixed to the opposite ends of the two vertical rods. A bevel gear IV is commonly meshed and connected to the right sides of the two bevel gears III. The bevel gear IV is fixedly connected to the center of the left side of the filter cylinder I.

[0006] Furthermore, a sewage collection tank is integrally formed on the left side inside the machine barrel. A sewage discharge pipe II communicates with the lower part inside the sewage collection tank. The bottom end of the sewage discharge pipe II penetrates to the lower side of the machine barrel. A scraping bar is fixed above the sewage collection tank. A cross bar is fixed to the center of the left side of the bevel gear II. The left end of the cross bar penetrates to the inside of the sewage collection tank and is fixed with a bevel gear V. A bevel gear VI is meshed with the bottom of the bevel gear V. A rotating rod is fixed to the middle of the bevel gear VI. A fixed valve plate is fixed inside the sewage discharge pipe II. A movable valve plate is fixed to the upper surface of the fixed valve plate at the bottom end of the rotating rod. The rotating rod is rotatably connected to the fixed valve plate and the scraping bar.

[0007] Furthermore, gear teeth are fixed to the outer surface of the connecting piece. The connecting piece is meshed and connected with the spur gear through the gear teeth.

[0008] Furthermore, one end of the sewage suction nozzle away from the sewage discharge pipe is a rubber suction cup. The sewage suction nozzle is attached to the inner surface of the filter cylinder II through the rubber suction cup; rubber layers are provided at both the left and right ends of the sliding plate.

[0009] Furthermore, the top of the scraping bar is attached to the outer surface of the filter cylinder I.

[0010] Furthermore, the incomplete gear is adapted to the two bevel gears III.

[0011] Furthermore, a sleeve is fixed to the lower surface of the sliding plate outside the bottom of the water outlet pipe. The sleeve is rotatably connected to the water outlet pipe. The water outlet pipe is an L-shaped elbow pipe.

[0012] Furthermore, the left end of the transmission rod is a worm in the meshing part with the worm gear, and the right end of the transmission rod is a screw in the threaded connection part with the sliding plate.

[0013] The beneficial effects of a commercial water purifier capable of deep purification in the present invention are as follows: (1) During the use of the present invention, the water outlet pipe reciprocates left and right under the action of the transmission rod and rotates under the influence of the meshing of the rack and the gear ring, so that the outlet position and direction of the water flow can be changed, enabling the filter materials in each part of the filter cylinder II to fully participate in filtration, avoiding overuse of local filter materials, prolonging the overall service life of the filter cylinder II, and improving the stability of the filtration effect.

[0014] (2) When the connecting piece rotates in the present invention, the lead screw drives the sewage discharge pipe, the sewage suction nozzle and the piston block to move left and right. Cooperating with the axial rotation of the second filter cylinder, the sewage suction nozzle and the second filter cylinder form a spiral relative displacement, which can attract and discharge the impurities sieved from the inner wall and filter holes of the second filter cylinder more comprehensively over a large area; When the first filter cylinder rotates, the scraping strip scrapes the residual impurities on its outer wall, and the impurities fall into the sewage collection tank. And the movable valve plate rotates periodically to open the second sewage discharge cylinder, so that the scraped impurities and a small amount of water flow are discharged, realizing automatic cleaning; The automatic cleaning can timely remove the impurities in the filter cylinder, ensure the normal operation of the filter cylinder, extend the service life of the filter cylinder, and reduce the manual maintenance cost and maintenance frequency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described in detail below with reference to the drawings and specific implementation methods.

[0016] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a schematic diagram of the internal structure of the present invention; Figure 3 is a schematic front sectional view structure diagram of the present invention; Figure 4 is the present invention Figure 3 enlarged schematic structural diagram at A in; Figure 5 is a schematic top sectional view structure diagram of the present invention; Figure 6 is a schematic diagram of the internal structure of the machine barrel in the present invention; Figure 7 is in the present invention Figure 6 partial sectional view structure diagram; Figure 8 is a schematic top sectional view structure diagram of the machine barrel in the present invention.

[0017] In the figure: 1. Machine barrel; 2. Water inlet cylinder; 3. First sewage discharge cylinder; 4. Partition board; 5. Connecting piece; 6. First filter cylinder; 7. Second filter cylinder; 8. Slot; 9. Slideway; 10. Slide plate; 11. Water outlet pipe; 12. Sleeve; 13. Tooth ring; 14. Rack; 15. Transmission rod; 16. Worm gear; 17. First helical gear; 18. Second helical gear; 19. Straight gear; 20. Inner frame; 21. Lead screw; 22. Sewage discharge pipe; 23. Sewage suction nozzle; 24. Piston block; 25. Sewage pump; 26. Bracket; 27. Impeller; 28. Incomplete gear; 29. Vertical rod; 30. Third helical gear; 31. Fourth helical gear; 32. Sewage collection tank; 33. Second sewage discharge cylinder; 34. Scraping strip; 35. Cross bar; 36. Fifth helical gear; 37. Sixth helical gear; 38. Rotating rod; 39. Fixed valve plate; 40. Movable valve plate. DETAILED DESCRIPTION OF THE INVENTION

[0018] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0019] To make the technical solution of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] Referring to Figures 1 - 8 , a commercial water purifier capable of deep purification, comprising a machine barrel 1. The left end of the machine barrel 1 is communicated with a water inlet tube 2, and the right end of the machine barrel 1 is communicated with a first sewage discharge tube 3. A partition 4 is fixed inside the machine barrel 1. A connecting member 5 is rotatably connected to the middle of the partition 4. A first filter cylinder 6 is fixed to the left side of the connecting member 5, and a second filter cylinder 7 is fixed to the right side of the connecting member 5. The filter holes of the second filter cylinder 7 are smaller than those of the first filter cylinder 6. When water enters the device, it is first preliminarily filtered by the first filter cylinder 6, and larger impurities in the water are filtered outside the first filter cylinder 6. Then, it enters the second filter cylinder 7 through the inside of the first filter cylinder 6 and is subjected to secondary deep purification filtration from the inside to the outside. Activated carbon particles are filled inside the first filter cylinder 6 and the second filter cylinder 7, which can further improve the purification effect. The right end of the second filter cylinder 7 is rotatably connected to the right side inside the machine barrel 1. A slot 8 is formed through the lower surface of the outer surface of the machine barrel 1. The slot 8 is located below the second filter cylinder 7. Sliding grooves 9 are respectively formed on the left and right sides inside the slot 8. A slide plate 10 is slidably connected to the two sliding grooves 9 together. A water outlet pipe 11 is connected through the inside of the slide plate 10. A toothed ring 13 is fixed to the outer surface of the water outlet pipe 11 inside the slide plate 10. A rack 14 is slidably connected to the inside of the slide plate 10. The rack 14 is meshed with the toothed ring 13. The left end of the rack 14 is fixed to the inside of the sliding groove 9. A transmission rod 15 is threadedly connected to the left side inside the slide plate 10. The left end of the transmission rod 15 is rotatably connected to the inside of the sliding groove 9. A worm gear 16 is meshed with the outer surface of the transmission rod 15. The top end of the worm gear 16 penetrates into the inside of the machine barrel 1 and is fixed with a first bevel gear 17. The right end of the first bevel gear 17 is meshed with a second bevel gear 18. A spur gear 19 is fixed to the right side of the second bevel gear 18. The right side of the spur gear 19 is rotatably connected to the lower left side of the partition 4. An inner frame 20 is fixed inside the connecting member 5. A lead screw 21 is threadedly connected to the inside of the inner frame 20. A sewage discharge pipe 22 is fixed to the right end of the lead screw 21 inside the second filter cylinder 7. A plurality of sewage suction nozzles 23 are communicated with the outer surface of the sewage discharge pipe 22. The right end of the sewage discharge pipe 22 is located inside the first sewage discharge tube 3 and is fixed with a piston block 24. A sewage pump 25 is communicated with the lower surface of the outer surface of the first sewage discharge tube 3. A support 26 is fixed inside the water inlet cylinder 2. A water impeller 27 is rotatably connected to the left side of the support 26. The right end of the water impeller 27 penetrates to the right side of the support 26 and is fixed with an incomplete gear 28. Vertical rods 29 are rotatably connected to the upper and lower sides of the left side inside the machine barrel 1. Bevel gears III 30 are fixed to the opposite ends of the two vertical rods 29. A bevel gear IV 31 is commonly meshed and connected to the right sides of the two bevel gears III 30. The bevel gear IV 31 is fixedly connected to the center of the left side of the first filter cylinder 6; A sewage collection tank 32 is integrally formed on the left side inside the machine barrel 1. A second sewage discharge cylinder 33 communicates with the lower part inside the sewage collection tank 32. The bottom end of the second sewage discharge cylinder 33 penetrates to the lower side of the machine barrel 1. A scraping strip 34 is fixed to the upper part inside the sewage collection tank 32. A cross bar 35 is fixed to the center of the left side of the bevel gear II 18. The left end of the cross bar 35 penetrates to the inside of the sewage collection tank 32 and is fixed with a bevel gear V 36. A bevel gear VI 37 is meshed and connected to the bottom of the bevel gear V 36. A rotating rod 38 is fixed to the middle of the bevel gear VI 37. A fixed valve plate 39 is fixed inside the second sewage discharge cylinder 33. A movable valve plate 40 is fixed to the upper surface of the rotating rod 38 at the bottom end of the rotating rod 38. The rotating rod 38 is rotatably connected to the fixed valve plate 39 and the scraping strip 34; During use, the left end of the water inlet cylinder 2 is connected to an external water supply pipeline. External water source enters the device from left to right. When the water flow disturbs the water impeller 27, the incomplete gear 28 rotates, and during the intermittent transmission of the two bevel gears III 30, the bevel gear IV 31 drives the first filter cylinder 6 to rotate intermittently in the positive and negative axial directions, and at the same time makes the connecting member 5 rotate synchronously with the second filter cylinder 7. The water flow is filtered and enters the inside of the first filter cylinder 6, and then enters the inside of the second filter cylinder 7. After being filtered by the second filter cylinder 7, it flows out of the second filter cylinder 7 and finally is discharged through the water outlet pipe 11; During the rotation of the connecting member 5, the lead screw 21 slides left and right under the action of the threaded connection, so that the sewage discharge pipe 22, the sewage suction nozzle 23, and the piston block 24 move synchronously. And when needed, the sewage pump 25 is turned on, and through the sewage suction nozzle 23, the inside of the second filter cylinder 7 is cleaned. Since the sewage suction nozzle 23 moves left and right, and the second filter cylinder 7 rotates axially, a spiral relative displacement is formed between the second filter cylinder 7 and the sewage suction nozzle 23, so that impurities sieved and filtered on the inner wall and filter holes of the second filter cylinder 7 can be attracted and processed more comprehensively over a large area and discharged, achieving the effect of cleaning the second filter cylinder 7 and treating sewage; While the inside of the second filter cylinder 7 is being cleaned when the connecting member 5 rotates, the scraping strip 34 scrapes off the residual impurities on the outer wall of the first filter cylinder 6. The impurities fall into the inside of the sewage collection tank 32. And under the sequential transmission of the connecting member 5, the bevel gear II 18, the cross bar 35, the bevel gear V 36, the bevel gear VI 37, and the rotating rod 38, the movable valve plate 40 rotates continuously. When the movable valve plate 40 overlaps with the fixed valve plate 39, the second sewage discharge cylinder 33 is temporarily opened, so that the scraped impurities and a small amount of water flow are discharged through the second sewage discharge cylinder 33, achieving the effect of cleaning the first filter cylinder 6 and treating sewage; While the helical gear II 18 is rotating, the worm gear 16 is rotated through the transmission of the helical gear I 17, and the transmission rod 15 is axially rotated. When the transmission rod 15 reciprocates axially, the slide plate 10 will drive the water outlet pipe 11 to move left and right reciprocally, so that the position of the top opening of the water outlet pipe 11 can be changed left and right, and the position of the filter cartridge II 7 close to it can be replaced. And in cooperation with the relative movement of the rack 14 and the gear ring 13 meshing, the water outlet pipe 11 is rotated, so that the direction and position of the top opening of the water outlet pipe 11 are continuously changed. And under the axial rotation cooperation of the filter cartridge II 7, the filtering position of the filter cartridge II 7 contacted by the water flow will not be limited to a single point or a single surface, so that the filter cartridge II 7 can perform the filtering operation more evenly.

[0021] Refer to Figures 6 - 7 , the outer surface of the connecting piece 5 is fixed with gear teeth, and the connecting piece 5 is meshed and connected with the spur gear 19 through the gear teeth. When the filter cartridge I 6 drives the connecting piece 5 to rotate, the spur gear 19 will be rotated through the gear teeth.

[0022] Refer to Figure 3 , Figure 7 , one end of the dirt suction nozzle 23 away from the sewage discharge pipe 22 is a rubber suction cup, and the dirt suction nozzle 23 is attached to the inner surface of the filter cartridge II 7 through the rubber suction cup to improve the suction force so as to better suck the impurities inside the filter cartridge II 7 and in the filter holes; rubber layers are provided at both the left and right ends of the slide plate 10 to improve the sealing performance.

[0023] Refer to Figures 3 - 4 , the top of the scraping strip 34 is attached to the outer surface of the filter cartridge I 6, so that when the filter cartridge I 6 rotates, the scraping strip 34 adheres to the surface of the filter cartridge I 6, and the impurities on its surface are scraped into the dirt collection tank 32.

[0024] Refer to Figures 2 - 6 , the incomplete gear 28 is adapted to the two helical gears III 30. When the incomplete gear 28 rotates, it can only be meshed and transmitted with a single helical gear III 30 within a certain time, so that the helical gear IV 31 is rotated through the intermittent rotation of the two helical gears III 30.

[0025] Refer to Figures 2 - 6 , a sleeve 12 is fixed on the lower surface of the slide plate 10 outside the bottom of the water outlet pipe 11, and the sleeve 12 is rotatably connected to the water outlet pipe 11. The water outlet pipe 11 is an L-shaped elbow pipe. When the L-shaped elbow pipe of the water outlet pipe 11 rotates, the top opening thereof can continuously change the direction and position during the rotation, so as to guide the water flow to filter and flow out from different positions of the filter cartridge II 7.

[0026] Refer to Figures 5 - 7 , the meshing part of the left end of the transmission rod 15 with the worm gear 16 is a worm, and the threaded connection part of the right end of the transmission rod 15 with the slide plate 10 is a screw rod, so that the transmission rod 15 is rotated under the transmission of the worm gear 16, and at the same time, the slide plate 10 is slid left and right through the screw rod part.

[0027] The above-described embodiments merely represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent for the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention shall be subject to the appended claims.

Claims

1. A commercial water purifier capable of deep purification, comprising a water purifier barrel (1), characterized in that: The left end of the machine barrel (1) is connected to a water inlet barrel (2), and the right end of the machine barrel (1) is connected to a sewage discharge barrel (3). A partition (4) is fixed inside the machine barrel (1), and a connecting piece (5) is rotatably connected to the middle of the partition (4). A filter cartridge (6) is fixed to the left side of the connecting piece (5), and a filter cartridge (7) is fixed to the right side of the connecting piece (5). The right end of the filter cartridge (7) is rotatably connected to the right side of the machine barrel (1). A slot (8) is provided through the lower part of the outer surface of the machine barrel (1), and the slot (8) is located below the filter cartridge (7). Slideways (9) are provided on the left and right sides of the slot (8), and the two slideways (9) have a common inner portion. A slide plate (10) is slidably connected, a water outlet pipe (11) is connected to the inside of the slide plate (10), a transmission rod (15) is threadedly connected to the left side of the inside of the slide plate (10), the left end of the transmission rod (15) is rotatably connected to the inside of the slideway (9), the outer surface of the transmission rod (15) is meshingly connected to a worm gear (16), the top end of the worm gear (16) passes through the inside of the barrel (1) and is fixed with a bevel gear 1 (17), the right end of the bevel gear 1 (17) is meshingly connected to a bevel gear 2 (18), the right side of the bevel gear 2 (18) is fixed with a spur gear (19), and the right side of the spur gear (19) is rotatably connected to the lower left side of the partition (4).

2. A commercial water purifier capable of deep purification according to claim 1, characterized in that: An inner frame (20) is fixed inside the connecting member (5), a screw rod (21) is threadedly connected inside the inner frame (20), the right end of the screw rod (21) is located inside the filter cartridge 2 (7), a sewage pipe (22) is fixed inside the sewage pipe (22), the outer surface of the sewage pipe (22) is connected to a plurality of sewage suction nozzles (23), the right end of the sewage pipe (22) is located inside the sewage cartridge 1 (3), and a piston block (24) is fixed thereto, and a sewage pump (25) is connected below the outer surface of the sewage cartridge 1 (3); A bracket (26) is fixed inside the water inlet cylinder (2), and an impeller (27) is rotatably connected to the left side of the bracket (26). The right end of the impeller (27) passes through the right side of the bracket (26) and is fixed with an incomplete gear (28). Vertical rods (29) are rotatably connected to the upper and lower parts of the left side of the inside of the machine barrel (1), and bevel gears (30) are fixed to the opposite ends of the two vertical rods (29). The right sides of the two bevel gears (30) are meshed with bevel gears (31), and the bevel gears (31) are fixedly connected to the center of the left side of the filter cartridge (6).

3. A commercial water purifier capable of deep purification according to claim 1, characterized in that: A dirt collecting trough (32) is integrally formed on the left side of the machine barrel (1). A second dirt discharge barrel (33) is connected to the lower part of the dirt collecting trough (32). The lower end of the second dirt discharge barrel (33) passes through the lower part of the machine barrel (1). A scraper strip (34) is fixed to the upper part of the dirt collecting trough (32). A cross bar (35) is fixed at the left center of the second bevel gear (18). The left end of the cross bar (35) passes through the inside of the dirt collecting trough (32) and is fixed with a fifth bevel gear (36). The bottom of the fifth bevel gear (36) is meshingly connected with a sixth bevel gear (37). A rotating rod (38) is fixed to the middle of the sixth bevel gear (37). A fixed valve plate (39) is fixed to the second dirt discharge barrel (33). The lower end of the rotating rod (38) is located on the upper surface of the fixed valve plate (39) and a movable valve plate (40) is fixed thereto. The rotating rod (38) is rotatably connected to the fixed valve plate (39) and the scraper strip (34).

4. A commercial water purifier capable of deep purification according to claim 1, characterized in that: Gear teeth are fixed to the outer surface of the connecting member (5), and the connecting member (5) is meshedly connected to the spur gear (19) via the gear teeth.

5. A commercial water purifier capable of deep purification according to claim 2, characterized in that: The end of the sewage suction nozzle (23) away from the sewage discharge pipe (22) is a rubber suction cup, and the sewage suction nozzle (23) is in contact with the inner surface of the second filter cartridge (7) through the rubber suction cup; the left and right ends of the slide plate (10) are both provided with a rubber layer.

6. A commercial water purifier capable of deep purification according to claim 3, characterized in that: The top of the scraper strip (34) is in contact with the outer surface of the filter cartridge 1 (6).

7. A commercial water purifier capable of deep purification according to claim 2, characterized in that: The incomplete gear (28) is matched with the two bevel gears (30).

8. A commercial water purifier capable of deep purification according to claim 1, characterized in that: A sleeve (12) is fixed to the lower surface of the slide plate (10) outside the bottom of the water outlet pipe (11); the sleeve (12) is rotatably connected to the water outlet pipe (11); and the water outlet pipe (11) is an L-shaped curved pipe.

9. A commercial water purifier capable of deep purification according to claim 1, characterized in that: The meshing portion of the left end of the transmission rod (15) and the worm wheel (16) is a worm, and the threaded connection portion of the right end of the transmission rod (15) and the slide plate (10) is a screw.

10. A commercial water purifier capable of deep purification according to claim 1, characterized in that: The outer surface of the water outlet pipe (11) is located inside the slide plate (10) and is fixed with a toothed ring (13). The slide plate (10) is slidably connected with a rack (14). The rack (14) is meshedly connected with the toothed ring (13). The left end of the rack (14) is fixedly connected to the inside of the slideway (9).

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