A vibrating screen for screening 2-chloronicotinic acid

Abstract

The present invention relates to the technical field of chloronicotinic acid screening, and discloses a vibrating screen for 2-chloronicotinic acid screening, including a lower shell body arranged inside a base, an upper shell body connected to the top of the lower shell body, a feed port arranged on the top of the upper shell body, a first screen mesh arranged between the upper shell body and the lower shell body, and two screen holes of different sizes arranged on the first screen mesh. The present invention provides large and small holes, and chloronicotinic acid first passes through the small hole to screen small impurities. If the small impurities pass through the large hole, they can be screened again through the second screen mesh. During use, the sieve hole diameter of the second screen mesh is much smaller than the large hole and the small hole. After screening again, the impurities enter the interior of the collecting box. When there are many large impurities, there is a long stroke for shaking screening when passing through the small hole and the large hole, so that there is a long screening time, thereby improving the screening effect.

Description

Technical Field

[0001] The invention relates to the technical field of chloronicotinic acid screening, in particular to a vibrating screen for screening 2-chloronicotinic acid. Background Art

[0002] In the production and processing of chloronicotinic acid, screening is an important link. It can effectively separate materials of different particle sizes and improve the quality and purity of the product. Screening technology is widely used in coal, metallurgy, petroleum, chemical industry, building materials, environmental protection and other fields. It is a key link in the production process of most enterprises and is responsible for the functions of grading, dehydration, desludging and de-intermediation.

[0003] When using a vibrating screen with traditional unit vibration intensity for deep screening of materials, the vibration intensity at the feed end and the discharge end is equal, the material at the feed end is prone to accumulation, the material layer thickness increases, loosening and stratification become slower, the screening efficiency decreases, and the screening effect deteriorates; the material layer thickness at the discharge end of the existing equipment quickly becomes thinner due to the high vibration intensity, the material moves too fast, and the residence time on the screen surface is short, resulting in the problem of not being able to be screened in time. Summary of the invention

[0004] The object of the present invention is to provide a vibrating screen for screening 2-chloronicotinic acid to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The present invention is a vibrating screen for 2-chloronicotinic acid screening, comprising a machine base, a protective shell is installed on the outer wall of the machine base, the discharge port and the port of the collecting box extend to the outer wall of the machine base, the feed port extends to the top outer side of the protective shell, and four connecting blocks are installed on the inner wall of the machine base, and the four connecting blocks are respectively on the inner side walls of the four corners of the machine base;

[0007] A lower shell is arranged inside the base, an upper shell is connected to the top of the lower shell, a feed port is arranged on the top of the upper shell, a first screen is arranged between the upper shell and the lower shell, and two screen holes of different sizes are arranged on the first screen;

[0008] The two sides of the lower shell are respectively connected with connecting plates, and a second spring is connected between the connecting plate and the connecting block;

[0009] An eccentric drive assembly is disposed inside the machine base, and holes are disposed on both sides of the lower shell to facilitate the eccentric drive assembly to pass through the lower shell;

[0010] The lower surfaces of the two connecting plates are respectively provided with two arc-shaped grooves for collision cooperation with the eccentric driving assembly;

[0011] Vibration components for connecting the plates to vibrate are respectively installed on the inner walls of both sides of the base;

[0012] A partition is connected between the lower surface of the first screen and the bottom inner wall of the lower shell, and second screens are obliquely arranged on both sides of the partition;

[0013] The purpose of the above arrangement is to form a chamber at the port of the upper shell, add 2-chloronicotinic acid into the interior of the chamber through the feed port of the upper shell, and shake the upper shell, the first screen and the lower shell by running the eccentric drive assembly. The 2-chloronicotinic acid passes through the first screen, and the first screen is provided with sieve holes of different sizes to screen particles of different diameters. The screened 2-chloronicotinic acid is separated by a partition and screened again through the second screen.

[0014] Further, the eccentric drive assembly includes a motor, two connecting shafts, a transmission belt, and an eccentric block for collision-matching with the arc-shaped groove;

[0015] The motor is mounted on the outer wall of the base, the two connecting shafts pass through two holes respectively, the two ends of the connecting shaft are rotatably connected to the base, the outer walls of the two connecting shafts are respectively provided with transmission wheels, and the transmission belt is connected between the two transmission wheels;

[0016] Eccentric blocks are respectively installed on the outer walls of the two connecting shafts, and the output shaft of the motor is connected to one of the connecting shafts;

[0017] The purpose of the above arrangement is to drive one of the connecting shafts to rotate through the output shaft of the motor, and then drive the other connecting shaft to rotate through the transmission wheel and the transmission belt, thereby driving the four eccentric blocks to rotate at the same time. The four eccentric blocks are installed at the same angle on the outer wall of the connecting shaft. During the collision, the four eccentric blocks and the four arc-shaped grooves are subjected to force at the same time, and the force directions are the same, so that the first screen shakes repeatedly in the same direction and frequency. The eccentric block collides with the arc-shaped groove of the connecting plate, and cooperates with the second spring connected to the connecting plate, thereby causing the first screen to shake, and 2-chloronicotinic acid is screened.

[0018] Furthermore, a collecting box is installed on the outer wall of the base, one end of the first screen extends into the interior of the collecting box, the collecting box and the bottom outer wall of the lower shell are both provided with a discharge port, and one end of the two second screens is inclined toward the discharge port;

[0019] The purpose of the above arrangement is that the collecting box is used to collect the impurities after screening.

[0020] Furthermore, two discharge ports are provided at the bottom end of the lower shell, and inclined plates are provided on the inner sides of the two discharge ports respectively;

[0021] The purpose of the above arrangement is to allow 2-chloronicotinic acid to flow out after screening.

[0022] Furthermore, the two sieve holes of different sizes are composed of a plurality of large holes and small holes, and the plurality of large holes and the plurality of small holes are respectively concentrated at one end of the first sieve;

[0023] The purpose of the above arrangement is that 2-chloronicotinic acid first passes through the small hole to screen the small impurities. If the small impurities pass through the large hole, they can be screened again through the second screen. During use, the sieve hole diameter of the second screen is much smaller than the large hole and the small hole. After the second screening, the impurities enter the interior of the collection box;

[0024] When there are many large impurities, they have a longer stroke for shaking screening when passing through small holes and large holes, resulting in a longer screening time and improved screening effect.

[0025] Furthermore, two offset plates are installed on the upper surface of the first screen, the two offset plates are symmetrically arranged on the first screen, and the two offset plates are offset from the small hole to the large hole respectively;

[0026] The purpose of the above arrangement is that one end of the two offset plates has a larger opening for a large amount of 2-chloronicotinic acid to enter the first screen, and one end of the two offset plates has a smaller opening for concentrated discharge of impurities.

[0027] Further, the vibration assembly includes a rubber elastic ball and a first spring, the first spring is connected to the inner wall of the base, the rubber elastic ball is installed at one end of the first spring away from the base, and the rubber elastic ball is above the connecting plate;

[0028] The purpose of the above arrangement is that during the shaking of the lower shell and the connecting plate, the connecting plate collides with the rubber elastic ball, and the first spring gives elasticity to the rubber elastic ball, thereby enhancing the shaking effect of the lower shell and the connecting plate.

[0029] Furthermore, a plurality of plates are evenly installed on the inner side of the upper shell, and gaps are provided between the plurality of plates;

[0030] The purpose of the above arrangement is to allow 2-chloronicotinic acid to be diverted and dispersed on the first sieve to prevent excessive accumulation on the first sieve.

[0031] Furthermore, a movable groove is provided on the top of each of the sheet plates, a movable plate is slidably connected to the movable groove, the movable plate is located inside the gap, a fixing rod is connected between the plurality of movable plates, and the fixing rod passes through the sliding groove and is slidably connected;

[0032] The purpose of the above arrangement is that the vibration assembly and the eccentric drive assembly cooperate to allow the upper shell to vibrate with a certain amplitude, so that the movable plate can intermittently move up and down on the movable groove, thereby allowing 2-chloronicotinic acid to intermittently enter the first screen.

[0033] Furthermore, the upper shell and the first screen are inclined toward the collecting box, a protective shell is installed on the outer wall of the base, the discharge port and the port of the collecting box extend to the outer wall of the base, and the feed port extends to the top outer side of the protective shell and is inclined by 1-5 degrees for the 2-chloronicotinic acid and impurities to flow, and the impurities enter the collecting box after screening;

[0034] A chamber is formed at the port of the upper shell, and 2-chloronicotinic acid is added to the interior of the chamber through the feed port of the upper shell, and one of the connecting shafts is driven to rotate through the output shaft of the motor, and then the other connecting shaft is driven to rotate through the transmission wheel and the transmission belt, thereby driving four eccentric blocks to rotate at the same time, and the eccentric blocks collide with the arc-shaped groove of the connecting plate, and cooperate with the second spring connected to the connecting plate, so that the first screen is shaken to screen the 2-chloronicotinic acid. The 2-chloronicotinic acid passes through the first screen, and the first screen is provided with screen holes of different sizes to screen particles of different diameters. The screened 2-chloronicotinic acid is separated by a partition and screened again through the second screen. After screening, two discharge ports are provided at the bottom end of the lower shell for the outflow of 2-chloronicotinic acid.

[0035] The present invention has the following beneficial effects:

[0036] (1) In the present invention, by setting large and small holes, 2-chloronicotinic acid first passes through the small hole to screen small impurities. If the small impurities pass through the large hole, they can be screened again through the second screen. During use, the sieve hole diameter of the second screen is much smaller than the large hole and the small hole. After the second screening, the impurities enter the interior of the collection box. When there are many large impurities, there is a longer stroke for shaking screening when passing through the small hole and the large hole, so that there is a longer screening time, the screening effect is improved, and the problem of short screening time is solved.

[0037] (2) The present invention arranges an eccentric driving assembly and a vibration assembly, drives one of the connecting shafts to rotate through the output shaft of the motor, and then drives another connecting shaft to rotate through the transmission wheel and the transmission belt, thereby driving four eccentric blocks to rotate at the same time. The eccentric blocks collide with the arc-shaped grooves of the connecting plate, and cooperate with the second spring connected to the connecting plate, thereby causing the first screen to shake, thereby screening 2-chloronicotinic acid;

[0038] During the shaking of the lower shell and the connecting plate, the connecting plate collides with the rubber elastic ball. The first spring gives the rubber elastic ball elasticity to enhance the shaking effect of the lower shell and the connecting plate. The eccentric drive assembly and the vibration assembly are arranged at the top feeding end of the lower shell, so that the top amplitude of the lower shell is larger to prevent accumulation, thereby solving the problem of easy accumulation of materials at the feeding end.

[0039] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0041] Figure 1 It is a schematic diagram of the protective shell structure of the outer wall of the base of the present invention;

[0042] Figure 2 This is a schematic diagram of the machine base structure of the present invention;

[0043] Figure 3 It is a schematic diagram of the vibration component of the present invention;

[0044] Figure 4 It is a schematic diagram of the internal structure of the present invention;

[0045] Figure 5 It is a schematic diagram of the eccentric drive assembly of the present invention;

[0046] Figure 6 The upper shell structure of the present invention is schematically shown in FIG. Figure 1 ;

[0047] Figure 7 The upper shell structure of the present invention is schematically shown in FIG. Figure 2 ;

[0048] Figure 8 It is a schematic diagram of the side structure of the upper shell of the present invention;

[0049] Fig. 9 It is a schematic diagram of the sheet structure of the present invention;

[0050] Fig.10 This is a schematic diagram of the first screen structure of the present invention;

[0051] Fig.11 It is a schematic diagram of the structure of the lower shell of the present invention;

[0052] Fig.12 This is a schematic diagram of the second screen structure of the present invention;

[0053] Fig.13 It is a schematic diagram of the large and small hole structure of the present invention;

[0054] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0055] In the figure: 1. base; 101. connecting block; 2. eccentric drive assembly; 201. motor; 202. eccentric block; 203. transmission belt; 204. connecting shaft; 3. upper shell; 4. collecting box; 5. vibration assembly; 501. rubber elastic ball; 502. first spring; 6. second spring; 7. lower shell; 701. connecting plate; 7010. arc groove; 702. hole; 8. sheet plate; 801. movable groove; 9. movable plate; 10. first screen; 1001. offset plate; 1002. large hole; 1003. small hole; 11. second screen; 12. partition; 13. protective shell. DETAILED DESCRIPTION

[0056] 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.

[0057] The present invention is a vibrating screen for sieving 2-chloronicotinic acid, such as Figure 1 - Fig.13 As shown, it includes a base 1, a protective shell 13 is installed on the outer wall of the base 1, the discharge port and the port of the collection box 4 extend to the outer wall of the base 1, the feed port extends to the top outside of the protective shell 13, and four connecting blocks 101 are installed on the inner wall of the base 1. The four connecting blocks 101 are respectively on the inner side walls of the four corners of the base 1;

[0058] A lower shell 7 is arranged inside the base 1, the top of the lower shell 7 is connected to the upper shell 3, the top of the upper shell 3 is provided with a feed port, a first screen 10 is arranged between the upper shell 3 and the lower shell 7, and the first screen 10 is provided with two screen holes of different sizes;

[0059] The two sides of the lower shell 7 are respectively connected with connecting plates 701, and the second spring 6 is connected between the connecting plate 701 and the connecting block 101;

[0060] An eccentric drive assembly 2 is disposed inside the base 1, and holes 702 are disposed on both sides of the lower shell 7 for the eccentric drive assembly 2 to pass through the lower shell 7;

[0061] The lower surfaces of the two connecting plates 701 are respectively provided with two arc-shaped grooves 7010 for collision cooperation with the eccentric driving assembly 2;

[0062] Vibration components 5 for connecting the plate 701 to vibrate are respectively installed on the inner walls of both sides of the base 1;

[0063] A partition 12 is connected between the lower surface of the first screen 10 and the bottom inner wall of the lower shell 7, and second screens 11 are obliquely arranged on both sides of the partition 12;

[0064] The purpose of the above arrangement is to form a chamber at the port of the upper shell 3, add 2-chloronicotinic acid into the interior of the chamber through the feed port of the upper shell 3, and shake the upper shell 3, the first screen 10 and the lower shell 7 by running the eccentric drive assembly 2, so that the 2-chloronicotinic acid passes through the first screen 10, and the first screen 10 is provided with screen holes of different sizes to screen particles of different diameters. The screened chloronicotinic acid is separated by the partition 12 and screened again through the second screen 11.

[0065] The eccentric drive assembly 2 includes a motor 201, two connecting shafts 204, a transmission belt 203, and an eccentric block 202 for collision cooperation with the arc-shaped groove 7010;

[0066] The motor 201 is mounted on the outer wall of the base 1, and the two connecting shafts 204 pass through the two holes 702 respectively. Both ends of the connecting shaft 204 are rotatably connected to the base 1. Transmission wheels are respectively arranged on the outer walls of the two connecting shafts 204, and the transmission belt 203 is connected between the two transmission wheels.

[0067] Eccentric blocks 202 are respectively installed on the outer walls of the two connecting shafts 204, and the output shaft of the motor 201 is connected to one of the connecting shafts 204;

[0068] The purpose of the above arrangement is to drive one of the connecting shafts 204 to rotate through the output shaft of the motor 201, and then drive the other connecting shaft 204 to rotate through the transmission wheel and the transmission belt 203, thereby driving the four eccentric blocks 202 to rotate at the same time. The four eccentric blocks 202 are installed at the same angle on the outer wall of the connecting shaft 204. During the collision, the four eccentric blocks 202 and the four arc-shaped grooves 7010 are subjected to force at the same time, and the force directions are the same, so that the first screen 10 shakes and keeps shaking repeatedly in the same direction and frequency. The eccentric block 202 collides with the arc-shaped groove 7010 of the connecting plate 701, and cooperates with the second spring 6 connected to the connecting plate 701, thereby causing the first screen 10 to shake and screen 2-chloronicotinic acid.

[0069] A collecting box 4 is installed on the outer wall of the base 1, one end of the first screen 10 extends to the inside of the collecting box 4, and a discharge port is provided on the outer wall of the bottom of the collecting box 4 and the lower shell 7, and one end of the two second screens 11 is inclined toward the discharge port;

[0070] The purpose of the above arrangement is that the collecting box 4 is used to collect the impurities in the 2-chloronicotinic acid after it is continuously screened by the first screen 10 .

[0071] The bottom end of the lower housing 7 is provided with two discharge ports, and the inner sides of the two discharge ports are respectively provided with inclined plates;

[0072] The purpose of the above arrangement is to allow 2-chloronicotinic acid to flow out after screening.

[0073] The two sieve holes of different sizes are composed of a plurality of large holes 1002 and a plurality of small holes 1003, and the plurality of large holes 1002 and the plurality of small holes 1003 are respectively concentrated at one end of the first sieve 10;

[0074] The purpose of the above settings is, Fig.10 As shown, 2-chloronicotinic acid first passes through the small hole 1003 to screen small impurities. If the small impurities pass through the large hole 1002, they can be screened again through the second screen 11. During use, the sieve hole diameter of the second screen 11 is much smaller than the large hole 1002 and the small hole 1003. After screening again, the impurities enter the interior of the collection box 4;

[0075] When there are many large impurities, they have a longer stroke for shaking screening when passing through the small hole 1003 and the large hole 1002, so that there is a longer screening time and the screening effect is improved.

[0076] Two offset plates 1001 are installed on the upper surface of the first screen 10. The two offset plates 1001 are symmetrically arranged on the first screen 10. The two offset plates 1001 are offset from the small hole 1003 to the large hole 1002.

[0077] The purpose of the above arrangement is that one end of the two offset plates 1001 has a larger opening for a large amount of nicotinic acid to enter the first screen 10, and one end of the two offset plates 1001 has a smaller opening for concentrated discharge of impurities.

[0078] The vibration assembly 5 includes a rubber elastic ball 501 and a first spring 502. The first spring 502 is connected to the inner wall of the base 1. The rubber elastic ball 501 is installed at one end of the first spring 502 away from the base 1. The rubber elastic ball 501 is located above the connecting plate 701.

[0079] The purpose of the above arrangement is that during the shaking of the lower shell 7 and the connecting plate 701 , the connecting plate 701 collides with the rubber elastic ball 501 , and the first spring 502 gives elasticity to the rubber elastic ball 501 , thereby enhancing the shaking effect of the lower shell 7 and the connecting plate 701 .

[0080] A plurality of plates 8 are evenly mounted on the inner side of the upper shell 3, and gaps are provided between the plurality of plates 8;

[0081] The purpose of the above arrangement is to allow 2-chloronicotinic acid to be diverted and dispersed on the first screen 10 to prevent excessive accumulation on the first screen 10.

[0082] A movable groove 801 is provided on the top of each sheet 8, and a movable plate 9 is slidably connected to the movable groove 801. The movable plate 9 is located inside the gap. A fixed rod is connected between several movable plates 9, and the fixed rod passes through the sliding groove and is slidably connected.

[0083] The purpose of the above arrangement is that the vibration assembly 5 and the eccentric drive assembly 2 cooperate to allow the upper shell 3 to vibrate with a certain amplitude, so that the movable plate 9 can intermittently move up and down on the movable groove 801, thereby allowing chloronicotinic acid to intermittently enter the first screen 10.

[0084] The upper shell 3 and the first screen 10 are inclined toward the collecting box 4, the discharge port and the port of the collecting box 4 extend to the outer wall of the base 1, and the feed port extends to the top outer side of the protective shell 13, inclined by 1-5 degrees, for the flow of nicotinic acid and impurities. After screening, the impurities enter the collecting box 4. The inclination of the upper shell 3, when the plate 8 is used for the diversion of nicotinic acid, cooperates with the shaking of the upper shell 3 to prevent the accumulation of materials in the gap and cause blockage.

[0085] When in use, a chamber is formed at the port of the upper shell 3, 2-chloronicotinic acid is added to the interior of the chamber through the feed port of the upper shell 3, and one of the connecting shafts 204 is driven to rotate by the output shaft of the motor 201, and then the other connecting shaft 204 is driven to rotate by the transmission wheel and the transmission belt 203, thereby driving the four eccentric blocks 202 to rotate at the same time. The four eccentric blocks 202 are installed at the same angle on the outer wall of the connecting shaft 204. During the collision process, the four eccentric blocks 202 and the four arc-shaped grooves 7010 are subjected to force at the same time, and the force direction is the same, so that the first screen 10 is shaken and kept shaking repeatedly in the same direction and at the same frequency, and the eccentric blocks 202 collides with the arc groove 7010 of the connecting plate 701, and cooperates with the second spring 6 connected to the connecting plate 701, so that the first screen 10 is shaken to screen the 2-chloronicotinic acid. The 2-chloronicotinic acid passes through the first screen 10. The first screen 10 is provided with screen holes of different sizes to screen particles of different diameters. The 2-chloronicotinic acid first passes through the small hole 1003 to screen small impurities. If the small impurities pass through the large hole 1002, they can be screened again through the second screen 11. During use, the diameter of the screen hole of the second screen 11 is much smaller than the large hole 1002 and the small hole 1003. After screening again, the impurities enter the interior of the collecting box 4;

[0086] When there are many large impurities, the small hole 1003 and the large hole 1002 have a longer stroke for shaking screening, so that there is a longer screening time and the screening effect is improved;

[0087] The screened 2-chloronicotinic acid is separated by a partition 12, and the upper shell 3 and the lower shell 7 are connected into an integral structure. The second screen 11 is installed on the inner side of the lower shell 7. During the shaking of the upper shell 3 and the lower shell 7, the second screen 11 is driven to shake, and the 2-chloronicotinic acid is screened again through the second screen 11. After screening, two discharge ports are provided at the bottom end of the lower shell 7 for the outflow of 2-chloronicotinic acid.

[0088] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A vibrating screen for screening 2-chloronicotinic acid, comprising a base (1), a protective shell (13) being installed on the outer wall of the base (1), a lower shell (7) being arranged inside the base (1), an upper shell (3) being connected to the top of the lower shell (7), a feed port being arranged at the top of the upper shell (3), and two discharge ports being arranged at the bottom of the lower shell (7); The discharge port and the ports of the collection box (4) extend to the outer wall of the machine base (1), and the feed port extends to the top outer side of the protective shell (13), characterized in that: Four connecting blocks (101) are installed on the inner wall of the machine base (1), and the four connecting blocks (101) are respectively on the inner side walls of the four corners of the machine base (1); A first screen (10) is arranged between the upper shell (3) and the lower shell (7), and the first screen (10) is provided with two screen holes of different sizes; The two sides of the lower shell (7) are respectively connected with connecting plates (701), and a second spring (6) is connected between the connecting plate (701) and the connecting block (101); An eccentric drive assembly (2) is disposed inside the machine base (1), and holes (702) are respectively disposed on both sides of the lower shell (7) for facilitating the eccentric drive assembly (2) to pass through the lower shell (7); The lower surfaces of the two connecting plates (701) are respectively provided with two arc-shaped grooves (7010) for collision cooperation with the eccentric drive assembly (2); Vibration components (5) for vibrating the connecting plate (701) are respectively installed on the inner walls on both sides of the machine base (1); A partition (12) is connected between the lower surface of the first screen (10) and the bottom inner wall of the lower shell (7), and second screens (11) are obliquely arranged on both sides of the partition (12); A plurality of plates (8) are evenly mounted on the inner side of the upper shell (3), and gaps are provided between the plurality of plates (8); A movable groove (801) is provided on the top of each sheet (8), a movable plate (9) is slidably connected to the movable groove (801), the movable plate (9) is located on the inner side of the gap, and a fixing rod is connected between a plurality of the movable plates (9), the fixing rod passes through the sliding groove and is slidably connected.

2. A vibrating screen for screening 2-chloronicotinic acid according to claim 1, characterized in that: The eccentric drive assembly (2) comprises a motor (201), two connecting shafts (204), a transmission belt (203), and an eccentric block (202) for collision-matching with the arc-shaped groove (7010); The motor (201) is mounted on the outer wall of the machine base (1); the two connecting shafts (204) pass through the two holes (702) respectively; both ends of the connecting shaft (204) are rotatably connected to the machine base (1); transmission wheels are respectively arranged on the outer walls of the two connecting shafts (204); and the transmission belt (203) is connected between the two transmission wheels; An eccentric block (202) is respectively mounted on the outer walls of the two connecting shafts (204), and the output shaft of the motor (201) is connected to one of the connecting shafts (204).

3. A vibrating screen for screening 2-chloronicotinic acid according to claim 2, characterized in that: A collecting box (4) is mounted on the outer wall of the base (1), one end of the first screen (10) extends into the interior of the collecting box (4), a discharge port is provided on the outer wall of the bottom of the collecting box (4) and the lower shell (7), and one end of the two second screens (11) is inclined toward the discharge port.

4. A vibrating screen for screening 2-chloronicotinic acid according to claim 3, characterized in that: Inclined plates are respectively arranged on the inner sides of the two discharge ports.

5. A vibrating screen for screening 2-chloronicotinic acid according to claim 4, characterized in that: The two sieve holes of different sizes are composed of a plurality of large holes (1002) and a plurality of small holes (1003), and the plurality of large holes (1002) and the plurality of small holes (1003) are respectively concentrated at one end of the first sieve (10).

6. A vibrating screen for screening 2-chloronicotinic acid according to claim 5, characterized in that: Two offset plates (1001) are installed on the upper surface of the first screen (10), and the two offset plates (1001) are symmetrically arranged on the first screen (10), and the two offset plates (1001) are offset from the small hole (1003) to the large hole (1002).

7. A vibrating screen for screening 2-chloronicotinic acid according to claim 6, characterized in that: The vibration component (5) comprises a rubber elastic ball (501) and a first spring (502), wherein the first spring (502) is connected to the inner wall of the base (1), and the rubber elastic ball (501) is mounted on an end of the first spring (502) away from the base (1), and the rubber elastic ball (501) is located above the connecting plate (701).

8. A vibrating screen for screening 2-chloronicotinic acid according to claim 1, characterized in that: The upper shell (3) and the first screen (10) are inclined in the direction of the collection box (4).

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