CN214973856U

CN214973856U - Compound fertilizer production equipment based on two ground paste

Info

Publication number: CN214973856U
Application number: CN202121343272.3U
Authority: CN
Inventors: 李占文; 张思维; 张敬旭; 董涛
Original assignee: Individual
Current assignee: Henan Yuneng Fertilizer Co., Ltd.
Priority date: 2021-06-16
Filing date: 2021-06-16
Publication date: 2021-12-03
Anticipated expiration: 2031-06-16

Abstract

The utility model relates to a compound fertilizer production technical field just discloses a compound fertilizer production equipment based on two ground paste, including the bottom plate, the top fixedly connected with of bottom plate is used for carrying out the casing of fertilizer production work in its inside, and the top fixedly connected with of casing is used for stirring the agitating unit of raw materials and is used for melting the melting tank of urea, and the equal fixedly connected with in left side of agitating unit and melting tank is used for carrying the conveyer pipe of raw materials. This compound fertilizer production facility based on two ground paste, guide way through setting up on guiding axle and the swing board cooperatees, it slides and promotes the swing board and swing along the guide way inner wall to make the guiding axle follow the rotor plate when rotating, thereby make the swing board drive the slide bar under the interlock effect of interlock board and remove, the slide bar promotes the reciprocal lift of elevator under the effect of push pedal, make elevator and transportation area collision, so that the transportation area rocks, reduce the probability of fertilizer caking, the production efficiency of fertilizer has been improved.

Description

Compound fertilizer production equipment based on two ground paste

Technical Field

The utility model relates to a compound fertilizer production technical field specifically is a compound fertilizer production facility based on two ground paste.

Background

The compound fertilizer is a chemical fertilizer containing two or more nutrient elements, has the advantages of high nutrient content, few side components, good physical properties and the like, and plays an important role in balancing fertilization, improving the utilization rate of the fertilizer and promoting the high and stable yield of crops. The technological process of producing composite fertilizer with double slurry includes the steps of adhering the solution in high viscosity to other basic material, drying, sieving, cooling, packing and other steps. The production equipment provided by the prior art is not suitable for a double-slurry granulation process, the phenomenon of particle agglomeration is easy to occur after the granulation of the compound fertilizer, the quality of agglomerated compound fertilizer particles is reduced, and the production efficiency of the fertilizer is influenced.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Not enough to prior art, the utility model provides a compound fertilizer production equipment based on two ground pastes has solved the phenomenon that appears the granule agglomeration easily after compound fertilizer granulation, and the compound fertilizer granule of agglomeration leads the matter to descend, influences the production efficiency's of chemical fertilizer problem.

(II) technical scheme

In order to achieve the above object, the utility model provides a following technical scheme: a compound fertilizer production device based on double slurry comprises a bottom plate, wherein the top of the bottom plate is fixedly connected with a shell for carrying out fertilizer production work in the shell, the top of the shell is fixedly connected with a stirring device for stirring raw materials and a melting tank for melting urea, the left sides of the stirring device and the melting tank are both fixedly connected with a conveying pipe for conveying the raw materials, the left side of the shell is fixedly connected with a feeding frame, the feeding frame is positioned below the conveying pipe, the right side of the feeding frame is provided with a conveying belt for conveying raw fertilizers, the right side of the conveying belt is provided with a screening plate for screening the raw materials according to the size, the top of the screening plate is provided with a plurality of groups of sieve holes with the same size, the right side of the screening plate is provided with a discharge plate, the right end of the discharge plate penetrates through the right side of the shell, and the right ends of the front side and the rear side of the discharge plate are both fixedly connected with a plurality of fixed blocks for fixing the position relation between the discharge plate and the shell, the left side of the fixed block is fixedly arranged on the right side of the shell, a group of feed bins for collecting finished fertilizer are arranged below the discharge plate and the screening plate, the bottom of each feed bin is connected to the top of the shell in a sliding manner, a group of partition plates for partitioning the interior of the shell are fixedly connected to the inner wall of the top of the shell and the top of the bottom plate, a heat dissipation fan is arranged below the transport belt, the bottom of the heat dissipation fan is fixedly arranged at the top of the bottom plate, brushes for cleaning fertilizer are arranged above the transport belt, the tops of the brushes are fixedly connected with the partition plates above the transport belt through connecting rods, two groups of lifting blocks for impacting fertilizer on the transport belt are arranged above the transport belt, the opposite sides of the two groups of lifting blocks are rotatably connected with the bottom end of the push plate, the right end of the push plate is rotatably connected with a sliding rod, and sliding chutes for limiting the movement track of the sliding rod are formed in the front side and the back side of the shell, the rear end of slide bar passes the casing and the swivelling joint has the interlock board that is used for promoting the slide bar motion, the right-hand member of interlock board rotates and is connected with the swing board, the bottom of swing board is passed through the fixed axle and is rotated the rear side of installing at the casing, swing board rear side is opened and is equipped with the guide way, and the inner wall sliding connection of guide way has the guiding axle, the rear end of guiding axle rotates and is connected with the rotor plate, the other end and gear motor's the output key-type connection of rotor plate rear side, gear motor's bottom is through backup pad fixed mounting on the bottom plate.

The inner wall of the bottom of the stirring device is rotatably connected with a stirring roller for stirring raw materials, the top of the stirring roller penetrates through the top of the stirring device and is in key connection with the output end of a servo motor, and the bottom of the servo motor is fixedly connected with the top of the stirring device.

Preferably, the inner wall of the left side of the feeding frame is fixedly connected with an inclined plate used for providing a guiding effect for the raw materials, and the inclined plate is positioned on the left side of the conveying belt.

Preferably, the right side of the conveying belt and the left side of the discharging plate are respectively contacted with the left side and the right side of the screening plate, and the tops of the conveying belt and the screening plate are positioned on the same horizontal plane.

Preferably, the included angle between the discharge plate and the horizontal plane is thirty degrees, and the width of the discharge plate is the same as that of the screening plate.

Preferably, a set of baffles is fixedly connected to the inner walls of the front side and the rear side of the shell, the transmission mechanism of the conveying belt is mounted on the opposite sides of the two sets of baffles, a gap is reserved between the baffles and the conveying belt, vertical limiting grooves are formed in the opposite sides of the baffles, and the inner walls of the limiting grooves are connected with the outer surfaces of the lifting blocks in a sliding mode.

Preferably, the connecting rod is L type pole, the left end of connecting rod and the right side fixed connection of conveyer belt top division board, and the connecting rod is provided with five groups altogether, and five groups of connecting rod equidistance fixed connection are at the top of brush.

Preferably, the part of the shell, which is positioned on the front side of the storage bin, is provided with a drawing groove which is convenient for drawing the storage bin out, and the height of the drawing groove is greater than that of the storage bin.

Preferably, the outer wall of the shell is provided with a plurality of groups of air holes, and the air holes are respectively arranged on the left side and the right side of the heat dissipation fan.

Preferably, the height of the guide groove on the swing plate is greater than twice the length of the swing plate.

(III) advantageous effects

Compared with the prior art, the utility model provides a compound fertilizer production facility based on two ground paste possesses following beneficial effect:

1. this compound fertilizer production facility based on two ground paste, guide way through setting up on guiding axle and the swing board cooperatees, it slides and promotes the swing board and swing along the guide way inner wall to make the guiding axle follow the rotor plate when rotating, thereby make the swing board drive the slide bar under the interlock effect of interlock board and remove, the slide bar promotes the reciprocal lift of elevator under the effect of push pedal, make elevator and transportation area collision, so that the transportation area rocks, reduce the probability of fertilizer caking, the production efficiency of fertilizer has been improved.

2. This compound fertilizer production facility based on two ground paste sieves fertilizer through setting up the screening board for the less fertilizer granule of size passes the sieve mesh on the screening board and falls into in the feed bin of screening board below, and the great fertilizer of size falls into another a set of feed bin via going out the flitch, thereby makes two sets of feed bins collect the fertilizer of unidimensional, so that the staff classifies compound fertilizer according to the size, has improved the use experience of device.

3. This compound fertilizer production facility based on two ground paste, through setting up brush and connecting rod, make the brush clear up the top of transportation area, avoid fertilizer to adhere to on the transportation area, improved the conveying efficiency in transportation area, through setting up division board and cooling fan, make cooling fan carry out drying and cooling to the raw materials that lies in its top, the division board reduces the wind that cooling fan blew off near the influence of screening board simultaneously, reduces the probability that the fertilizer that sieves out falls in the feed bin outside.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a sectional view of the structure of the present invention;

FIG. 3 is a schematic structural view of the sieving plate of the present invention;

fig. 4 is an exploded view of a part of the structure of the present invention.

In the figure: 1. a base plate; 2. a housing; 3. a stirring device; 31. a servo motor; 4. a melting tank; 5. a delivery pipe; 6. a feeding frame; 61. a sloping plate; 7. a conveyor belt; 8. a screening plate; 9. a discharge plate; 10. a fixed block; 11. a storage bin; 12. a partition plate; 13. a heat radiation fan; 14. a connecting rod; 15. a brush; 16. a linkage plate; 17. a swing plate; 18. a guide shaft; 19. a rotating plate; 20. a reduction motor; 21. a support plate; 22. a lifting block; 23. pushing the plate; 24. a slide bar; 25. and a baffle plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-4, the present invention provides a technical solution: the utility model provides a compound fertilizer production equipment based on two ground paste, comprising a base plate 1, the top fixedly connected with of bottom plate 1 is used for carrying out the casing 2 of fertilizer granulation work in its inside, the top fixedly connected with of casing 2 is used for stirring agitating unit 3 of raw materials and is used for melting groove 4 of urea, the equal fixedly connected with in left side of agitating unit 3 and melting groove 4 is used for the conveyer pipe 5 of carrying raw materials, the left side fixedly connected with feeding frame 6 of casing 2, feeding frame 6 is located conveyer pipe 5's below, the right side of feeding frame 6 is provided with and is used for transporting former fertilizer transportation area 7, the right side of transportation area 7 is provided with the screening board 8 that is used for screening the raw materials according to the size, the sieve mesh that multiunit size is the same is seted up at the top of screening board 8, the right side of screening board 8 is provided with out flitch 9, the right-hand member that goes out flitch 9 passes the right-hand member of casing 2 and goes out the equal fixedly connected with of right-hand member of both sides around flitch 9 a set of fixed block 10 that is used for fixing the position relation between flitch 9 and the casing 2 The left side of the fixed block 10 is fixedly arranged on the right side of the shell 2, a group of storage bins 11 for collecting finished fertilizer are arranged below the discharge plate 9 and the screening plate 8, the bottom of each storage bin 11 is connected to the top of the shell 2 in a sliding manner, a group of partition plates 12 for partitioning the interior of the shell 2 are fixedly connected to the inner wall of the top of the shell 2 and the top of the bottom plate 1, a heat dissipation fan 13 is arranged below the transport belt 7, the bottom of the heat dissipation fan 13 is fixedly arranged on the top of the bottom plate 1, brushes 15 for cleaning fertilizer are arranged above the transport belt 7, the top of each brush 15 is fixedly connected with the partition plates 12 above the transport belt 7 through connecting rods 14, two groups of lifting blocks 22 for impacting fertilizer on the transport belt 7 are arranged above the transport belt 7, the opposite sides of the two groups of lifting blocks 22 are rotatably connected with the bottom ends of the push plates 23, and the right ends of the push plates 23 are rotatably connected with sliding rods 24, the front side and the rear side of the shell 2 are respectively provided with a sliding chute for limiting the motion trail of the sliding rod 24, the rear end of the sliding rod 24 penetrates through the shell 2 and is rotatably connected with a linkage plate 16 used for pushing the sliding rod 24 to move, the right end of the linkage plate 16 is rotatably connected with a swing plate 17, the bottom end of the swing plate 17 is rotatably installed on the rear side of the shell 2 through a fixed shaft, the rear side of the swing plate 17 is provided with a guide groove, the inner wall of the guide groove is slidably connected with a guide shaft 18, the rear end of the guide shaft 18 is rotatably connected with a rotating plate 19, the other end of the rear side of the rotating plate 19 is in key connection with the output end of the speed reducing motor 20, the speed reducing motor 20 adopts a Y355M2-6 type motor, and the bottom of the speed reducing motor 20 is fixedly installed on the bottom plate 1 through a support plate 21.

Specifically, in order to improve the stirring efficiency of urea, agitating unit 3's bottom inner wall rotates and is connected with the stirring roller that is used for stirring the raw materials, and agitating unit 3's top parallel key is passed at the top of stirring roller is connected with servo motor 31's output, and servo motor 31 adopts Y160L-2 model motor, servo motor 31's bottom and agitating unit 3's top fixed connection for servo motor 31 drive stirring roller rotates in order to stir urea.

Specifically, for the convenience of conveying belt 7 transports the raw materials after mixing, the left side inner wall fixedly connected with of feeding frame 6 is used for providing the swash plate 61 of guide effect for the raw materials, and swash plate 61 is located the left side of conveying belt 7 for the raw materials fall landing right behind swash plate 61 upper surface and fall on conveying belt 7.

Specifically, in order to avoid fertilizer to drop inside casing 2, the right side of conveyer belt 7 and the left side of play flitch 9 contact with the left and right sides of screening board 8 respectively, and the top of conveyer belt 7, screening board 8 is located same horizontal plane, avoids the contact department of screening board 8 and play flitch 9 or conveyer belt 7 to drop.

Specifically, in order to facilitate the fertilizer that sieves out to fall into the feed bin 11 that is located the casing 2 right side, the contained angle that goes out between flitch 9 and the horizontal plane is thirty degrees, and the width that goes out flitch 9 is the same with sieve board 8 for fertilizer is transported to and is followed ejection of compact board 9 top landing under the action of gravity behind ejection of compact board 9 top.

Specifically, in order to improve the practicality of device, a set of baffle 25 of the equal fixedly connected with of both sides inner wall around casing 2, the drive mechanism of transportation area 7 installs the opposite side at two sets of baffles 25, and leave the space between baffle 25 and the transportation area 7, so that cooling fan 13 cools off fertilizer, vertical spacing groove has been seted up to the opposite side of baffle 25, the inner wall of spacing groove and elevator 22's surface sliding connection, make elevator 22 reciprocate under the effect of push pedal 23 and go up and down.

Specifically, in order to improve the stability of the device, the connecting rod 14 is an L-shaped rod, the left end of the connecting rod 14 is fixedly connected with the right side of the partition plate 12 above the conveyor belt 7, the connecting rod 14 is provided with five groups, and the five groups of connecting rods 14 are fixedly connected at the top of the brush 15 at equal intervals, so that the connecting rod 14 uniformly supports the brush 15.

Specifically, in order to facilitate the staff to collect and deposit fertilizer in the feed bin 11, the part that casing 2 is located 11 front sides of feed bin has seted up the pull groove of being convenient for take feed bin 11 out, and the height that highly is greater than feed bin 11 in pull groove for the staff easily takes feed bin 11 out.

Specifically, in order to improve the cooling efficiency of the device, a plurality of groups of air holes are formed in the outer wall of the shell 2, the air holes are respectively formed in the left side and the right side of the cooling fan 13, the air holes improve the air permeability of the device, and the cooling fan 13 is convenient to cool the fertilizer on the conveying belt 7.

Specifically, in order to facilitate the rotation of the swing plate 17 driven by the rotation plate 19 through the guide shaft 18, the height of the guide groove on the swing plate 17 is greater than twice the length of the rotation plate 19, so that the guide shaft 18 always contacts with the top inner wall or the bottom inner wall of the guide groove when sliding along the inner wall of the guide groove, and the situation that the guide shaft 18 is clamped by the swing plate 17 is avoided.

The working principle is as follows: when producing fertilizer, adding granular urea into a melting tank 4 to prepare urea molten slurry, then putting urea, sulfuric acid and water into a stirring device 3 according to a required proportion to stir and configure the urea molten slurry to prepare urea sulfate slurry, then discharging the urea molten slurry and the urea sulfate slurry into a feeding frame 6 through a conveying pipe 5 so as to enable raw materials to fall on the top of a conveying belt 7, conveying the raw materials to the inside of a shell 2 by the conveying belt 7, driving a rotating plate 19 to rotate by a speed reducing motor 20, enabling a guide shaft 18 to slide along the inner wall of the guide groove while rotating along with the rotating plate 19, enabling the inner wall of the guide shaft 18 and the guide groove to apply force and push the swinging plate 17 to rotate around a fixed shaft due to the fact that the bottom end of the swinging plate 17 is rotatably connected with the shell 2 through the fixed shaft, driving a sliding rod 24 to slide back and forth along the inner wall of a sliding chute through a linkage plate 16, and pushing a lifting block 22 to descend through a pushing plate 23 when the sliding rod 24 moves leftwards, on the contrary, promote the elevator 22 through push pedal 23 pulling when the slide bar 24 moves to the right side to make elevator 22 be reciprocating elevating movement in succession, transport area 7 produces vibrations when elevator 22 collides with transport area 7, make the raw materials of caking scatter, reduce the probability of caking phenomenon appears in fertilizer, then fertilizer is through screening board 8 screening, the part of tiny granule falls into the feed bin 11 of screening board 8 below, surplus fertilizer from ejection of compact board 9 top landing and fall into the feed bin 11 of ejection of compact board 9 below, in order to collect the fertilizer after the production.

In conclusion, the compound fertilizer production equipment based on the double slurry has the advantages that the guide shaft 18 is matched with the guide groove on the swing plate 17, so that the guide shaft 18 slides along the inner wall of the guide groove when rotating along with the rotating plate 19 and pushes the swing plate 17 to swing, the swing plate 17 drives the sliding rod 24 to move under the linkage action of the linkage plate 16, the sliding rod 24 pushes the lifting block 22 to reciprocate under the action of the push plate 23, the lifting block 22 collides with the conveying belt 7, the conveying belt 7 shakes, the probability of fertilizer caking is reduced, the production efficiency of the fertilizer is improved, the fertilizer is screened by the screening plate 8, fertilizer particles with smaller sizes penetrate through the sieve holes on the screening plate 8 and fall into the storage bin 11 below the screening plate 8, the fertilizer with larger sizes falls into the other storage bin 11 through the discharge plate 9, and the two storage bins 11 collect the fertilizers with different sizes, so that the staff classifies compound fertilizer according to the size, the use that has improved the device is experienced, through setting up brush 15 and connecting rod 14, make brush 15 clear up the top of transportation area 7, avoid fertilizer to adhere to on transportation area 7, the conveying efficiency of transportation area 7 has been improved, through setting up division board 12 and cooling fan 13, make cooling fan 13 carry out drying and cooling to the raw materials that lies in its top, division board 12 reduces the wind that cooling fan 13 blew off and to screening board 8 near influence simultaneously, reduce the probability that the fertilizer that sieves out falls in the feed bin 11 outside.

The electrical components presented in the document are all electrically connected with an external master controller and 220V mains, and the master controller can be a conventional known device controlled by a computer or the like.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a compound fertilizer production equipment based on two ground paste, including bottom plate (1), the top fixedly connected with of bottom plate (1) is used for casing (2) of carrying out fertilizer production work in its inside, the top fixedly connected with of casing (2) is used for agitating unit (3) of stirring raw materials and is used for melting groove (4) of melting urea, the equal fixedly connected with in left side of agitating unit (3) and melting groove (4) is used for conveyer pipe (5) of carrying the raw materials, the left side fixedly connected with feeding frame (6) of casing (2), feeding frame (6) are located the below of conveyer pipe (5), its characterized in that: the right side of the feeding frame (6) is provided with a conveying belt (7) for conveying raw fertilizer, the right side of the conveying belt (7) is provided with a screening plate (8) for screening raw materials according to sizes, the top of the screening plate (8) is provided with a plurality of groups of sieve meshes with the same size, the right side of the screening plate (8) is provided with a discharge plate (9), the right end of the discharge plate (9) penetrates through the right side of the shell (2) and is fixedly connected with a group of fixed blocks (10) for fixing the position relation between the discharge plate (9) and the shell (2), the left side of the fixed blocks (10) is fixedly arranged on the right side of the shell (2), a group of storage bins (11) for collecting finished fertilizer are arranged below the discharge plate (9) and the screening plate (8), the bottom of the storage bins (11) is slidably connected to the top of the shell (2), the inner wall of the top of the shell (2) and the top of the bottom plate (1) are fixedly connected with a group of partition plates (12) used for partitioning the interior of the shell (2), a heat dissipation fan (13) is arranged below the conveyor belt (7), the bottom of the heat dissipation fan (13) is fixedly installed at the top of the bottom plate (1), two groups of lifting blocks (22) used for impacting fertilizers on the conveyor belt (7) are arranged above the conveyor belt (7), the opposite sides of the two groups of lifting blocks (22) are rotatably connected with the bottom end of the push plate (23), the right end of the push plate (23) is rotatably connected with a sliding rod (24), sliding grooves used for limiting the movement track of the sliding rod (24) are formed in the front side and the back side of the shell (2), the rear end of slide bar (24) passes casing (2) and the swivelling joint has interlock board (16) that is used for promoting slide bar (24) motion, the right-hand member of interlock board (16) rotates and is connected with swing board (17), the bottom of swing board (17) is installed in the rear side of casing (2) through the fixed axle rotation, swing board (17) rear side is seted up the guide way, and the inner wall sliding connection of guide way has guiding axle (18), the rear end rotation of guiding axle (18) is connected with rotor plate (19), the other end and the output key-type connection of gear motor (20) of rotor plate (19) rear side, the bottom of gear motor (20) is passed through backup pad (21) fixed mounting on bottom plate (1).

2. A compound fertilizer production apparatus based on dual slurries as claimed in claim 1, wherein: the bottom inner wall of agitating unit (3) rotates and is connected with the stirring roller that is used for stirring the raw materials, and the top parallel key-type that agitating unit (3) was passed at the top of stirring roller is connected with the output that has servo motor (31), the bottom of servo motor (31) and the top fixed connection of agitating unit (3).

3. A compound fertilizer production apparatus based on dual slurries as claimed in claim 1, wherein: the left inner wall of the feeding frame (6) is fixedly connected with an inclined plate (61) used for providing a guiding effect for raw materials, and the inclined plate (61) is positioned on the left side of the conveying belt (7).

4. A compound fertilizer production apparatus based on dual slurries as claimed in claim 1, wherein: the right side of the conveying belt (7) and the left side of the discharging plate (9) are respectively contacted with the left side and the right side of the screening plate (8), and the tops of the conveying belt (7) and the screening plate (8) are positioned on the same horizontal plane.

5. A compound fertilizer production apparatus based on dual slurries as claimed in claim 1, wherein: the included angle between the discharge plate (9) and the horizontal plane is thirty degrees, and the width of the discharge plate (9) is the same as that of the screening plate (8).

6. A compound fertilizer production apparatus based on dual slurries as claimed in claim 1, wherein: the equal fixedly connected with a set of baffle (25) of both sides inner wall around casing (2), the drive mechanism of transportation area (7) installs the opposite side at two sets of baffles (25), and leaves the space between baffle (25) and transportation area (7), and vertical spacing groove has been seted up to the opposite side of baffle (25), the inner wall in spacing groove and the surface sliding connection of elevator (22).

7. A compound fertilizer production apparatus based on dual slurries as claimed in claim 1, wherein: the connecting rod (14) is an L-shaped rod, the left end of the connecting rod (14) is fixedly connected with the right side of the partition plate (12) above the conveying belt (7), five groups of connecting rods (14) are arranged, and the five groups of connecting rods (14) are fixedly connected to the top of the hairbrush (15) at equal intervals.

8. A compound fertilizer production apparatus based on dual slurries as claimed in claim 1, wherein: the part of the shell (2) positioned on the front side of the storage bin (11) is provided with a drawing groove which is convenient for drawing the storage bin (11), and the height of the drawing groove is greater than that of the storage bin (11).

9. A compound fertilizer production apparatus based on dual slurries as claimed in claim 1, wherein: the outer wall of the shell (2) is provided with a plurality of groups of air holes, and the air holes are respectively arranged on the left side and the right side of the cooling fan (13).

10. A compound fertilizer production apparatus based on dual slurries as claimed in claim 1, wherein: the height of the guide groove on the swinging plate (17) is more than twice of the length of the rotating plate (19).