Double-layer vibration screening device for quartz sand preparation

Abstract

The invention relates to the technical field of quartz sand preparation, and discloses a double-layer vibration screening device for quartz sand preparation, which comprises a feeding primary screening mechanism, a first-layer screening device and a second-layer screening device which are sequentially arranged from right to left and from high to low, a transverse shaft is welded between the front and rear ends of the left portion of the material conveying sliding way and the first supporting leg, the front and rear ends of the right portion of the material conveying sliding way and the front and rear ends of the bottom of the feeding channel are connected with fixing shaft plates, the first screening plate is arranged at the upper end of the first supporting frame, the first collecting hopper is arranged at the lower end of the first supporting frame, and the second screening plate is arranged at the upper end of the second supporting frame. The second collecting hopper is arranged at the lower end of the second supporting frame, and the right ends of the first-layer screening device and the second-layer screening device are both connected with a screen plate lifting driving mechanism, so that gradual layered discharging and screening of quartz sand can be achieved, vibration screening is automatically controlled, dust and impurities of discharged materials are purified and filtered, screening dust raising is avoided, and the quality of quartz sand screening is improved.

Description

Technical Field

[0001] The invention relates to the technical field of quartz sand preparation, in particular to a double-layer vibrating screening device for quartz sand preparation. Background Art

[0002] Before using quartz sand, it is necessary to screen it so that quartz sand of different particle sizes can be sorted out for use. When screening quartz sand, a screening device is required. At present, the existing quartz sand preparation vibration screening device has the following problems: it is impossible to screen quartz sand through multiple layers of equipment in sequence, the screening effect is not ideal, and large dust impurities will be generated during the screening process, and the quality of quartz sand collection is poor. For this reason, it is necessary to design a corresponding technical solution to solve it. Summary of the invention

[0003] 1. Technical issues to be resolved

[0004] In view of the shortcomings of the prior art, the present invention provides a double-layer vibrating screening device for preparing quartz sand, which solves the technical problems that quartz sand cannot be screened through multiple layers of equipment in sequence, the screening effect is not ideal, and large dust impurities are generated during the screening process, resulting in poor quartz sand collection quality.

[0005] (II) Technical solution

[0006] To achieve the above purpose, the present invention is implemented through the following technical solutions: a double-layer vibrating screening device for preparing quartz sand, comprising a feed preliminary screening mechanism, a first-layer screening device and a second-layer screening device, wherein the feed preliminary screening mechanism, the first-layer screening device and the second-layer screening device are arranged in sequence from right to left and from high to low, the feed preliminary screening mechanism comprises a feed bin, a feed channel and a material conveying slideway, the feed bin and the feed channel are an integrated structure, a support leg is welded to the top corner end of the feed bin, and the left front and rear ends of the material conveying slideway are connected to the support leg. A horizontal axis is welded between them, and the front and rear ends of the right side of the material conveying slide and the front and rear ends of the bottom of the feed channel are connected with a fixed axis plate. The first-layer screening device includes a support frame, a screen plate and a collecting hopper. The screen plate is arranged at the upper end of the support frame, and the collecting hopper is arranged at the lower end of the support frame. The second-layer screening device includes a support frame, a screen plate and a collecting hopper. The screen plate is arranged at the upper end of the support frame, and the collecting hopper is arranged at the lower end of the support frame. The right ends of the first-layer screening device and the second-layer screening device are both connected with a screen plate lifting drive mechanism.

[0007] Preferably, a fixing plate is welded to the upper left end of the supporting leg one, an electric push rod device is installed at the middle outer end of the fixing plate, a push rod is connected through the inner end of the electric push rod device, an impact plate is provided at the inner end of the push rod, a collar is welded to the outer end of the impact plate, the push rod is inserted into the inside of the collar, locking bolts are distributed around the outer side of the collar through threaded connections, the impact feed channel can be automatically controlled, the initial screening is more convenient, and the impact plate assembly is convenient and quick to disassemble and assemble.

[0008] Preferably, a fixing frame is welded to the upper left end of the material conveying slide, a purification device is installed on the upper end of the fixing frame, an air inlet is provided at the bottom of the purification device, and an air outlet is provided at the top of the purification device. Automatic control can be started to suck and purify dust and impurities, and then discharge them, with high environmental protection performance.

[0009] Preferably, a baffle is provided inside the feed channel, and a through hole is distributed inside the baffle. A limiting plate is welded to the outer end of the baffle, and the corner end of the limiting plate is connected to the right side of the feed channel by bolts. A handle is welded to the outer end of the limiting plate to facilitate the hand-held disassembly and assembly of the limiting plate, so that large quartz sand remaining on the upper end of the baffle can be removed.

[0010] Preferably, a limiting plate is welded around the outer end of the top of the support frame one, a supporting leg is welded to the bottom corner end of the support frame one, a supporting column is welded to the right end of the supporting leg two, two through holes are opened and distributed on the right half of the sieve plate one, an aggregate channel is welded to the front of the left end of the sieve plate one, an aggregate port is welded to the front end of the aggregate channel one, a convex plate is fixed around the top of the sieve plate one, an aggregate port is welded to the left end of the aggregate hopper one, and the aggregate port one and the aggregate port two are arc-shaped structures, which are convenient for screening and collecting quartz sand of different particle sizes through the aggregate port one and the aggregate port two.

[0011] Preferably, a limiting plate two is welded around the top of the support frame two, a supporting leg three is welded at the bottom corner end of the support frame two, a supporting column two is welded at the right end of the supporting leg three, three through holes are opened and distributed on the right half of the screen plate two, an aggregate channel two is welded on the left side of the support frame two, an aggregate port three is welded on the left side of the aggregate channel two, and an aggregate port four is connected to the bottom left front end of the aggregate hopper two, so as to facilitate the screening and collection of quartz sand of different particle sizes through the aggregate ports three and four.

[0012] Preferably, the screen plate lifting drive mechanism is fixedly arranged on the top of the support column 1 and the support column 2 to facilitate stable support and placement.

[0013] Preferably, the screen plate lifting drive mechanism includes a driving motor, a fixed seat, a positioning plate 1 and a positioning plate 2, the inner end of the driving motor is connected to a driving shaft, the inner end of the driving shaft is fixedly provided with a fixing ring 1, the inner end of the fixing ring 1 is fixedly provided with a connecting rod 1, the inner end of the connecting rod 1 is fixedly provided with a fixing ring 2, the inner end of the fixing ring 2 is fixedly provided with a connecting rod 2, the connecting rod 2 is rotatably connected to the inner end of the fixed seat, the positioning plate 1 is welded to the left end of the fixing ring 1, the positioning plate 2 is welded to the left end of the fixing ring 2, the left ends of the positioning plate 1 and the positioning plate 2 are connected to the sieve plate 1 and the sieve plate 2 by bolts, so as to facilitate automatic control of the connecting rod rotation adjustment, so that the positioning plate 1 and the positioning plate 2 can be adjusted in a small range, so that the right ends of the sieve plate 1 and the sieve plate 2 are lifted, and screening is more convenient.

[0014] (III) Beneficial effects

[0015] The double-layer vibration screening device for preparing quartz sand cooperates with the feeding primary screening mechanism, the first-layer screening device and the second-layer screening device to realize the step-by-step stratified feeding and screening of quartz sand, automatically control the vibration screening, purify and filter the dust and impurities of the feeding, avoid screening dust, and improve the quality of quartz sand screening. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 It is a schematic diagram of the upper left end of the front part of the feed primary screening mechanism of the present invention;

[0018] Figure 3 It is a schematic diagram of the upper right end of the front part of the feed primary screening mechanism of the present invention;

[0019] Figure 4 It is a top view schematic diagram of the feed primary screening mechanism of the present invention;

[0020] Figure 5 This is a schematic diagram of the structure of the feed primary screening mechanism of the present invention, viewed from the left and at the lower right end;

[0021] Figure 6 It is a schematic diagram of the impact vibration mechanism of the present invention;

[0022] Figure 7 It is a schematic diagram of the upper left front structure of the first-layer screening device of the present invention;

[0023] Figure 8 It is a schematic diagram of the structure of the upper right end of the front part of the first-layer screening device of the present invention;

[0024] Fig. 9 It is a schematic diagram of the structure of the lower right end of the front part of the first-layer screening device of the present invention;

[0025] Fig.10 It is a schematic diagram of the structure of the upper right end of the front part of the second-layer screening device of the present invention;

[0026] Fig.11 It is a schematic diagram of the screen plate lifting driving mechanism of the present invention.

[0027] In the figure, feed primary screening mechanism 1, feed bin 11, feed channel 12, material conveying slide 13, fixed shaft plate 131, horizontal shaft 132, support leg 14, purification device 15, fixed frame 151, air inlet 152, electric push rod device 16, impact plate 161, fixed plate 162, collar 163, push rod 164, locking bolt 165, baffle 17, through hole 171, limit plate 172, handle 173, first layer screening device 2, support frame 121, limit plate 1211, support leg 212, support column 1213, sieve plate 122, through hole 22 1. Aggregate channel 1 222, aggregate port 1 223, convex plate 224, aggregate hopper 1 23, aggregate port 2 231, second layer screening device 3, support frame 2 31, limit plate 2 311, support leg 3 312, support column 2 313, sieve plate 2 32, through hole 321, aggregate channel 2 322, aggregate port 3 323, aggregate hopper 2 33, aggregate port 4 331, sieve plate lifting drive mechanism 4, drive motor 41, drive shaft 42, fixing ring 1 43, connecting rod 1 44, fixing ring 2 45, connecting rod 2 46, fixing seat 47, positioning plate 1 48, positioning plate 2 49. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] See also Figure 1-11The embodiment of the present invention provides a technical solution: a double-layer vibrating screening device for preparing quartz sand, comprising a feed preliminary screening mechanism 1, a first-layer screening device 2 and a second-layer screening device 3. The feed preliminary screening mechanism 1, the first-layer screening device 2 and the second-layer screening device 3 are arranged in sequence from right to left and from high to low, so that screening is smoother. The feed preliminary screening mechanism 1 comprises a feed bin 11, a feed channel 12 and a material conveying slide 13. The feed bin 11 and the feed channel 12 are an integrated structure. A support leg 14 is welded to the top corner end of the feed bin 11, and a horizontal support leg 14 is welded between the left front and rear ends of the material conveying slide 13 and the support leg 14. Shaft 132, the front and rear ends of the right side of the material conveying slide 13 and the front and rear ends of the bottom of the feed channel 12 are connected with a fixed shaft plate 131, the first-layer screening device 2 includes a support frame 21, a screen plate 22 and a collecting hopper 23, the screen plate 22 is arranged at the upper end of the support frame 21, and the collecting hopper 23 is arranged at the lower end of the support frame 21, the second-layer screening device 3 includes a support frame 31, a screen plate 32 and a collecting hopper 33, the screen plate 32 is arranged at the upper end of the support frame 31, and the collecting hopper 33 is arranged at the lower end of the support frame 31, and the right ends of the first-layer screening device 2 and the second-layer screening device 3 are both connected with a screen plate lifting drive mechanism 4.

[0030] As a further improvement, a fixing plate 162 is welded to the upper left end of the supporting leg 14, an electric push rod device 16 is installed at the middle outer end of the fixing plate 162, a push rod 164 is connected through the inner end of the electric push rod device 16, an impact plate 161 is provided at the inner end of the push rod 164, a collar 163 is welded to the outer end of the impact plate 161, the push rod 164 is inserted into the inside of the collar 163, locking bolts 165 are distributed around the outer side of the collar 163 through threaded connections, which can automatically control the impact on the feed channel 12, making the initial screening more convenient, and the impact plate 161 assembly is convenient and quick to disassemble and assemble.

[0031] As a further improvement, a fixing frame 151 is welded to the upper left end of the material conveying slide 13, and a purification device 15 is installed on the upper end of the fixing frame 151. An air inlet 152 is provided at the bottom of the purification device 15, and an air outlet is provided at the top of the purification device 15. Automatic control can be started to suck and purify dust and impurities, and then discharge them, with high environmental protection performance.

[0032] As a further improvement, a baffle 17 is provided inside the feed channel 12, and a through hole 171 is opened and distributed inside the baffle 17. A limiting plate 172 is welded to the outer end of the baffle 17, and the corner end of the limiting plate 172 is connected to the right side of the feed channel 12 by bolts. A handle 173 is welded to the outer end of the limiting plate 172, which is convenient for holding and disassembling the limiting plate 172, and the large quartz sand remaining on the upper end of the baffle 17 can be removed.

[0033] For further improvement, a limit plate 211 is welded around the outer end of the top of the support frame 21 to provide limit protection to prevent quartz sand from falling, a support leg 212 is welded at the bottom corner end of the support frame 21, a support column 213 is welded at the right end of the support leg 212, a through hole 221 is provided on the right half of the sieve plate 22, a feed channel 222 is welded in front of the left end of the sieve plate 22, a feed port 223 is welded at the front end of the feed channel 222, a convex plate 224 is fixed around the top of the sieve plate 22 to further prevent quartz sand from falling, a feed port 231 is welded at the left end of the feed hopper 23, and the feed port 223 and the feed port 231 are arc-shaped structures, which are convenient for screening and collecting quartz sand of different particle sizes through the feed port 223 and the feed port 231.

[0034] For further improvement, a limiting plate 2 311 is welded around the top of the support frame 2 31, a supporting leg 3 312 is welded to the bottom corner end of the support frame 2 31, a supporting column 2 313 is welded to the right end of the supporting leg 312, a through hole 321 is provided on the right half of the sieve plate 2 32, an aggregate channel 2 322 is welded to the left side of the support frame 2 31, an aggregate port 3 323 is welded to the left side of the aggregate channel 2 322, and an aggregate port 4 331 is connected to the bottom left front end of the aggregate hopper 2 33, so as to facilitate the screening and collection of quartz sand of different particle sizes through the aggregate port 323 and the aggregate port 4 331.

[0035] As a further improvement, the screen plate lifting driving mechanism 4 is fixedly arranged on the top of the support column 1 213 and the support column 2 313 , so as to stably support and place the screen plate lifting driving mechanism 4 on the top of the support column 1 213 and the support column 2 313 .

[0036] Specifically, the sieve plate lifting drive mechanism 4 includes a driving motor 41, a fixing seat 47, a positioning plate 1 48 and a positioning plate 2 49, the inner end of the driving motor 41 is connected to a driving shaft 42, the inner end of the driving shaft 42 is fixedly provided with a fixing ring 1 43, the inner end of the fixing ring 1 43 is fixedly provided with a connecting rod 1 44, the inner end of the connecting rod 1 44 is fixedly provided with a fixing ring 2 45, the inner end of the fixing ring 2 45 is fixedly provided with a connecting rod 2 46, the connecting rod 2 46 is rotatably connected to the inner end of the fixing seat 47, the positioning plate 1 48 is welded to the left end of the fixing ring 1 43, the positioning plate 2 49 is welded to the left end of the fixing ring 2 45, the left ends of the positioning plates 1 48 and 2 49 are connected to the sieve plates 1 22 and 2 32 by bolts, so as to facilitate the automatic control of the connecting rod rotation adjustment, so that the positioning plates 1 48 and 2 49 can be adjusted in a small range, so that the right ends of the sieve plates 1 22 and 2 32 are lifted, making screening more convenient and smooth.

[0037] Working principle: Put the quartz sand raw material directly into the feed bin 11, start the electric push rod device 16 to automatically control the push rod 164 to reciprocate and extend, so that the impact plate 161 impacts the left side of the feed channel 12, so that the quartz sand vibrates and falls through the multiple through holes 171 inside the baffle 17, and the quartz sand falls into the material conveying slide 13; at the same time, start the purification device 15, filter and purify the air after the air inlet 152, and then exhaust it through the air outlet; the quartz sand falls to the sieve plate 12 at the upper end of the support frame 121, first start the drive motor 41 to automatically control the drive shaft 42 to rotate and adjust, so that the connecting rod 1 44 and the connecting rod 2 46 are supported to rotate inside the fixed seat 47, so that the fixing ring 1 43 and the fixing ring 2 45 control the positioning plate 1 48 and the positioning plate 2 49 to rotate slightly, so that The right end of the sieve plate 22 is raised to facilitate the collection of large particles of quartz sand through the aggregate channel 222 and the aggregate port 1 223, and the small particles of quartz sand are screened and discharged into the aggregate hopper 23 through the through hole 221, and then fall from the aggregate port 231 to the sieve plate 2 32 at the upper end of the support frame 2 31; the drive motor 41 is started again to automatically control the rotation and adjustment of the drive shaft 42, so that the connecting rod 1 44 and the connecting rod 2 46 are supported on the inside of the fixed seat 47 to rotate, so that the fixing ring 1 43 and the fixing ring 2 45 control the positioning plate 1 48 and the positioning plate 2 49 to rotate slightly, thereby raising the right end of the sieve plate 2 32, which is convenient for the collection of large particles of quartz sand through the aggregate channel 2 322 and the aggregate port 3 323, and the small particles of quartz sand are screened and discharged into the aggregate port 4 331 through the through hole 321 for collection.

[0038] The feed preliminary screening mechanism 1 of the present invention, the feed bin 11, the feed channel 12, the material conveying slide 13, the fixed shaft plate 131, the horizontal shaft 132, the support leg 14, the purification device 15, the fixing frame 151, the air inlet 152, the electric push rod device 16, the impact plate 161, the fixing plate 162, the collar 163, the push rod 164, the locking bolt 165, the baffle 17, the through hole 171, the limit plate 172, the handle 173, the first layer screening device 2 , support frame 1 21, limit plate 1 211, support leg 2 212, support column 1 213, sieve plate 1 22, through hole 221, aggregate channel 1 222, aggregate port 1 223, convex plate 224, aggregate hopper 1 23, aggregate port 2 231, second layer screening device 3, support frame 2 31, limit plate 2 311, support leg 3 312, support column 2 313, sieve plate 2 32, through hole 321, aggregate channel 2 322, aggregate port 3 323, The collecting hopper 2 33, the collecting port 4 331, the screen plate lifting drive mechanism 4, the driving motor 41, the driving shaft 42, the fixing ring 1 43, the connecting rod 1 44, the fixing ring 2 45, the connecting rod 2 46, the fixing seat 47, the positioning plate 1 48, and the positioning plate 2 49 are all universal standard parts or parts known to technical personnel in this field, and their structures and principles can be known to technical personnel in this field through technical manuals or through conventional experimental methods. The problem solved by the present invention is that it is impossible to screen quartz sand through multiple layers of equipment in sequence, the screening effect is not ideal, and large dust impurities are generated during the screening process, and the quality of quartz sand collection is poor. The present invention combines the above-mentioned components with each other, and the feed initial screening mechanism, the first layer screening device and the second layer screening device cooperate with each other, so as to realize the gradual layered screening of quartz sand, automatically control the vibration screening, purify and filter the dust impurities of the material, avoid screening dust, and improve the quality of quartz sand screening.

[0039] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0040] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A double-layer vibrating screening device for preparing quartz sand, comprising a feed primary screening mechanism (1), a first-layer screening device (2) and a second-layer screening device (3), characterized in that: The feed primary screening mechanism (1), the first layer screening device (2) and the second layer screening device (3) are arranged in sequence from right to left and from high to low. The feed primary screening mechanism (1) comprises a feed bin (11), a feed channel (12) and a material conveying slideway (13). The feed bin (11) and the feed channel (12) are an integrated structure. A support leg (14) is welded to the top corner end of the feed bin (11). A horizontal axis (132) is welded between the left front and rear ends of the material conveying slideway (13) and the support leg (14). The right front and rear ends of the material conveying slideway (13) and the bottom front and rear ends of the feed channel (12) are connected to a fixed shaft plate (132). 31), the first-layer screening device (2) comprises a support frame (21), a sieve plate (22) and a collecting hopper (23), the sieve plate (22) is arranged at the upper end of the support frame (21), and the collecting hopper (23) is arranged at the lower end of the support frame (21), the second-layer screening device (3) comprises a support frame (31), a sieve plate (32) and a collecting hopper (33), the sieve plate (32) is arranged at the upper end of the support frame (31), and the collecting hopper (33) is arranged at the lower end of the support frame (31), and the right ends of the first-layer screening device (2) and the second-layer screening device (3) are both connected to a sieve plate lifting driving mechanism (4).

2. A double-layer vibrating screening device for preparing quartz sand according to claim 1, characterized in that: A fixing plate (162) is welded to the upper left end of the supporting leg (14), an electric push rod device (16) is installed at the middle outer end of the fixing plate (162), a push rod (164) is connected through the inner end of the electric push rod device (16), an impact plate (161) is provided at the inner end of the push rod (164), a collar (163) is welded to the outer end of the impact plate (161), the push rod (164) is inserted into the inside of the collar (163), and locking bolts (165) are distributed around the outer side of the collar (163) through threaded connection.

3. A double-layer vibrating screening device for preparing quartz sand according to claim 1, characterized in that: A fixing frame (151) is welded to the upper left end of the material conveying slideway (13), a purification device (15) is installed at the upper end of the fixing frame (151), an air inlet (152) is provided at the bottom of the purification device (15), and an air outlet is provided at the top of the purification device (15).

4. A double-layer vibrating screening device for preparing quartz sand according to claim 1, characterized in that: A baffle (17) is provided inside the feed channel (12), and a through hole (171) is provided inside the baffle (17). A limiting plate (172) is welded to the outer end of the baffle (17), and the corner end of the limiting plate (172) is connected to the right side of the feed channel (12) by bolts. A handle (173) is welded to the outer end of the limiting plate (172).

5. A double-layer vibrating screening device for preparing quartz sand according to claim 1, characterized in that: A limiting plate (211) is welded around the outer end of the top of the support frame (21), a supporting leg (212) is welded at the bottom corner of the support frame (21), a supporting column (213) is welded at the right end of the supporting leg (212), a through hole (221) is opened and distributed on the right half of the sieve plate (22), a material collection channel (222) is welded in front of the left end of the sieve plate (22), a material collection opening (223) is welded at the front end of the material collection channel (222), a convex plate (224) is fixed around the top of the sieve plate (22), a material collection opening (231) is welded at the left end of the material collection hopper (23), and the material collection opening (223) and the material collection opening (231) are arc-shaped structures.

6. A double-layer vibrating screening device for preparing quartz sand according to claim 1, characterized in that: A limiting plate 2 (311) is welded around the top of the support frame 2 (31), a supporting leg 3 (312) is welded at the bottom corner end of the support frame 2 (31), a supporting column 2 (313) is welded at the right end of the supporting leg 3 (312), a through hole 3 (321) is opened and distributed on the right half of the sieve plate 2 (32), a collection channel 2 (322) is welded on the left side of the support frame 2 (31), a collection port 3 (323) is welded on the left side of the collection channel 2 (322), and a collection port 4 (331) is connected to the left front end of the bottom of the collection hopper 2 (33).

7. A double-layer vibrating screening device for preparing quartz sand according to claim 1, characterized in that: The screen plate lifting driving mechanism (4) is fixedly arranged on the top of the first support column (213) and the second support column (313).

8. A double-layer vibrating screening device for preparing quartz sand according to claim 7, characterized in that: The screen plate lifting drive mechanism (4) comprises a driving motor (41), a fixing seat (47), a first positioning plate (48) and a second positioning plate (49); the inner end of the driving motor (41) is connected to a driving shaft (42); the inner end of the driving shaft (42) is fixedly provided with a fixing ring (43); the inner end of the fixing ring (43) is fixedly provided with a connecting rod (44); the inner end of the connecting rod (44) is fixedly provided with a fixing ring (45); 45), the inner end of the fixing ring 2 (45) is fixedly provided with a connecting rod 2 (46), and the connecting rod 2 (46) is rotatably connected to the inner end of the fixing seat (47), the positioning plate 1 (48) is welded to the left end of the fixing ring 1 (43), the positioning plate 2 (49) is welded to the left end of the fixing ring 2 (45), and the left ends of the positioning plate 1 (48) and the positioning plate 2 (49) are connected to the sieve plate 1 (22) and the sieve plate 2 (32) by bolts.

Images