Screening device for sodium carboxymethyl cellulose production

Abstract

The invention discloses a screening device for sodium carboxymethyl cellulose production, and relates to the technical field of screening, the screening device for sodium carboxymethyl cellulose production comprises a screening frame, a linear motor is fixedly installed on the outer wall of the screening frame, a feeding frame is fixedly arranged above the screening frame in a penetrating mode, and the screening device further comprises a screening device, the screening device comprises a pushing rod, a screening plate, a fixing frame, a sliding block, a connecting rod, a fixing block, a secondary screening frame and a collecting frame, the pushing rod rotationally penetrates through the output end of the linear motor, and the screening plate is rotationally installed on the inner wall of the screening frame; according to the screening device for sodium carboxymethyl cellulose production, raw materials which do not meet the standard can be conveniently collected in the screening process, the collected raw materials are re-screened, the utilization rate of the raw materials is increased, and meanwhile the situation that the follow-up treatment cost is affected due to the fact that the raw materials which do not meet the standard are scattered due to the fact that the collecting frame is not installed in place is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of screening, in particular to a screening device for producing sodium carboxymethyl cellulose. Background Art

[0002] Sodium carboxymethyl cellulose (CMC) is an important chemical raw material, widely used in food, medicine, cosmetics, papermaking and other industries. In its production process, the design and application of screening devices play a vital role. It is mainly used for grading, removing impurities and screening of raw materials and final products.

[0003] The patent with patent announcement number CN213494909U relates to a screening device for the production of sodium carboxymethyl cellulose, which belongs to the production field. A screening device for the production of sodium carboxymethyl cellulose includes an inlet and a discharge port, a transmission shaft is installed inside the motor, a discharge chute is installed below the fixed plate, a hinge is installed on the left side of the support frame, and a slide bar is provided on the left side of the hinge, a spring is installed outside the slide bar, and a box door is provided outside the spring, the discharge port is installed at the bottom end of the screening inner shell, and a stable base is provided below the discharge port; the patent installs a double-layer screen on the left side of the lifting block, and a discharge chute is installed inside the screen, so that the equipment has a double screening function, which can greatly improve the yield rate of the goods, and allow materials that do not meet the standards to be discharged from the discharge chute, so as to achieve the purpose of facilitating collection and recycling.

[0004] In the above patent, a double-layer screen is installed on the left side of the lifting block, and a discharge trough is installed inside the screen, so that the equipment has a double screening function, which can greatly improve the yield rate of the goods, and allow materials that do not meet the standards to be discharged from the discharge trough, so as to facilitate collection and recycling. However, in the process of discharging materials that do not meet the standards from the discharge trough, it is easy to discharge products that meet the standards together, thereby increasing the waste of raw materials and increasing the subsequent processing costs. For this reason, a screening device for the production of sodium carboxymethyl cellulose with better screening effect is designed. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a screening device for the production of sodium carboxymethyl cellulose, which solves the problems raised in the above-mentioned background technology.

[0006] To achieve the above purpose, the present invention is implemented by the following technical scheme: a screening device for sodium carboxymethyl cellulose production, comprising a screening frame, a linear motor is fixedly installed on the outer wall of the screening frame, a feed frame is fixedly penetrated above the screening frame, and also comprises: a screening device, the screening device comprises a push rod, a screening plate, a fixed frame, a sliding block, a connecting rod, a fixed block, a double screening frame and a collecting frame, the output end of the linear motor reciprocates to drive the push rod to reciprocate, and the push rod reciprocates to drive the screening plate to swing, the push rod rotates and penetrates the output end of the linear motor, the screening plate is rotatably installed on the inner wall of the screening frame, the fixed frame is fixedly installed on the inner wall of the screening frame, the sliding block is slidably installed on the outer wall of the fixed frame, the connecting rod is rotatably installed inside the sliding block, the fixed block is fixedly installed above the screening plate, the double screening frame is slidably installed on the outer wall of the fixed frame, the collecting frame slides through the inner and outer walls of the fixed frame, the end of the connecting rod away from the sliding block is rotatably connected to the fixed block, the end of the pushing rod away from the linear motor is rotatably connected to the bottom of the screening plate, the screening plate swings to repeatedly throw up the raw materials, and the screening efficiency of the raw materials is improved.

[0007] According to the above technical solution, a discharge port is provided on the surface of the re-screening frame, a feed port is provided on the surface of the fixed frame, the sliding block is fixedly connected to the re-screening frame, a slide groove is provided on the surface of the fixed frame, a limiting rod is slidably installed on the inner wall of the slide groove, an L-shaped baffle is slidably installed on the inner wall of the fixed frame, a receiving rod is fixedly installed under the L-shaped baffle, the collecting frame moves to contact and squeeze the receiving rod to move upward, the receiving rod moves upward to drive the L-shaped baffle to move upward, and the L-shaped baffle moves upward to release the closure of the feed port on the surface of the fixed frame.

[0008] According to the above technical solution, the surface of the limit rod is set as bevel surface 1, the bottom of the receiving rod is set as bevel surface 2, a telescopic elastic rod 1 is set between the limit rod and the inner wall of the slide groove, and the telescopic elastic rod 1 is reset after contraction and drives the limit rod to move downward, thereby realizing the limitation of the collection frame, and a telescopic elastic rod 2 is set between the inner walls of the L-shaped baffle, and the telescopic elastic rod 2 can drive the L-shaped baffle to reset.

[0009] According to the above technical scheme, a quantitative device for avoiding excessive raw material feeding at one time is arranged inside the feed frame, the quantitative device comprises a guide plate and a quantitative frame, the guide plate is fixedly mounted on the inner wall of the feed frame, and the quantitative frame is slidably mounted on the inner wall of the feed frame, the quantitative device also comprises an inclined rod, a moving block, an L-shaped plate, a connecting rod and a receiving block, the sliding block drives the inclined rod to move back and forth during the up and down movement of the sliding block, and the reciprocating movement of the inclined rod drives the moving block to move left and right, the inclined rod is rotatably mounted inside the sliding block, the moving block is slidably mounted on the top of the inner wall of the screening frame, the L-shaped plate slides through the inner and outer walls of the feed frame, the connecting rod is rotatably mounted on one end of the L-shaped plate close to the quantitative frame, the receiving block is fixedly mounted below the quantitative frame, the end of the inclined rod away from the sliding block is rotatably connected to the moving block, the end of the connecting rod away from the L-shaped plate is rotatably connected to the receiving block, the quantitative frame moves downward to prevent the discharge from the inside of the feed frame, and realizes quantitative intermittent discharge of raw materials.

[0010] According to the above technical solution, one end of the L-shaped plate away from the connecting rod is slidably connected to the top of the inner wall of the screening frame, and a No. 1 spring is arranged between the L-shaped plate and the outer wall of the feed frame. The No. 1 spring can reset the L-shaped plate. A feed hole is provided on the surface of the quantitative frame. The quantitative frame moves upward so that the raw material inside the feed frame enters the interior of the quantitative frame through the feed hole.

[0011] According to the above technical solution, the bottom of the inner wall of the quantitative frame is set as a second bevel, and the outer wall of the quantitative frame is slidably connected to the material guide plate. The second bevel can facilitate the discharge of the raw materials.

[0012] According to the above technical scheme, a spreading device for avoiding the accumulation and discharge of raw materials is arranged inside the feed frame, and the spreading device includes a spreading plate and a smearing plate, the spreading plate is fixedly mounted on the inner wall of the feed frame, and the smearing plate is slidably mounted on the inner wall of the feed frame, the spreading device also includes a toggle rod, a connecting plate, a U-shaped plate and a receiving shaft, when the L-shaped plate moves in the direction close to the feed frame, it drives the toggle rod to move, the toggle rod is fixedly mounted under the L-shaped plate, a toggle groove is provided on the surface of the feed frame, the connecting plate is slidably mounted inside the toggle groove, the U-shaped plate is fixedly mounted on the outer wall of the feed frame, the receiving shaft slides through the left and right walls of the connecting plate, the connecting plate is fixedly connected to the smearing plate, and a wavy groove is provided on the surface of the connecting plate, the reciprocating movement of the connecting plate drives the reciprocating movement of the smearing plate, and the reciprocating movement of the smearing plate can evenly discharge the raw materials on its surface through the spreading plate to the surface of the screening plate.

[0013] According to the above technical solution, the receiving shaft is fixedly connected to the U-shaped plate, and a No. 2 spring is arranged between the U-shaped plate and the connecting plate. The No. 2 spring can drive the connecting plate to reset, thereby improving the stability of the connecting plate during movement and further improving the screening efficiency of the raw materials.

[0014] The present invention provides a screening device for the production of sodium carboxymethyl cellulose. It has the following beneficial effects: (1) The screening device for sodium carboxymethyl cellulose production, through the coordinated operation of the screening plate, the fixed frame, the sliding block, the connecting rod, the fixed block, the re-screening frame and the collecting frame, facilitates the collection of raw materials that do not meet the standards during the screening process, and re-screens the collected raw materials, thereby improving the utilization rate of the raw materials. At the same time, the coordinated operation of the limit rod, the L-shaped baffle plate, the receiving rod, the telescopic elastic rod 1 and the telescopic elastic rod 2 prevents the collection frame from being installed in place, resulting in the spillage of raw materials that do not meet the standards, thereby affecting the subsequent processing costs.

[0015] (2) The screening device for the production of sodium carboxymethyl cellulose, through the coordinated operation of the guide plate, the quantitative frame, the inclined rod, the moving block, the L-shaped plate, the connecting rod, the receiving block and the No. 1 spring, drives the quantitative frame to move up and down to achieve quantitative and intermittent discharge of the raw materials, ensuring that the raw materials processed each time can be fully screened, and can reduce the risk of clogging of the screening plate, maintain the efficient operation of the screening equipment, and at the same time can effectively avoid the leakage of raw materials when the equipment stops working, thereby improving the utilization rate of raw materials.

[0016] (3) The screening device for the production of sodium carboxymethyl cellulose, through the coordinated operation of the spreading plate, the smearing plate, the toggle rod, the connecting plate, the U-shaped plate, the receiving shaft, the wave groove and the No. 2 spring, drives the smearing rod to move back and forth to evenly discharge the raw materials on its surface through the spreading plate to the surface of the screening plate. The dispersed discharge can improve the screening efficiency of the screening plate for the raw materials, avoid the accumulation of too much raw materials at the same position resulting in reduced fluidity of the raw materials, and at the same time, under the action of the receiving shaft and the No. 2 spring, the stability of the connecting plate during the movement is improved, thereby further improving the screening efficiency of the raw materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the overall cross-sectional structure of the present invention; Figure 3 This is a schematic diagram of the position structure of the screen plate and the sliding block of the present invention; Figure 4 This is a schematic diagram of the position structure of the multiple screening frame and the L-shaped baffle of the present invention; Figure 5 For the present invention Figure 4 The enlarged structural diagram of part A in the middle; Figure 6 This is a schematic diagram of the position structure of the moving block and the quantitative frame of the present invention; Figure 7 It is a schematic diagram of the position structure of the connecting plate and the spreading plate of the present invention.

[0018] In the figure: 1. screening frame; 101. linear motor; 2. feeding frame; 3. pushing rod; 4. screening plate; 5. fixed frame; 6. sliding block; 7. connecting rod; 8. fixed block; 9. re-screening frame; 10. collecting frame; 11. limiting rod; 12. L-shaped baffle; 13. receiving rod; 14. telescopic elastic rod one; 15. telescopic elastic rod two; 161. material guide plate; 162. quantitative frame; 163. oblique rod; 164. moving block; 165. L-shaped plate; 166. connecting rod; 167. receiving block; 168. No. 1 spring; 171. spreading plate; 172. smearing plate; 173. toggle rod; 174. connecting plate; 175. U-shaped plate; 176. receiving shaft; 177. wave groove; 178. No. 2 spring. DETAILED DESCRIPTION

[0019] 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.

[0020] See also Figure 1-Figure 7 One embodiment of the present invention is: a screening device for sodium carboxymethyl cellulose production, comprising a screening frame 1, a linear motor 101 is fixedly installed on the outer wall of the screening frame 1, a feed frame 2 is fixedly penetrated above the screening frame 1, and also comprises: a screening device, the screening device comprises a push rod 3, a screening plate 4, a fixed frame 5, a sliding block 6, a connecting rod 7, a fixed block 8, a re-screening frame 9 and a collecting frame 10, the output end of the linear motor 101 reciprocates to drive the push rod 3 to reciprocate, the push rod 3 reciprocates to drive the screening plate 4 to swing, the push rod 3 rotates and penetrates the output end of the linear motor 101, the screening plate 4 is rotatably installed on the inner wall of the screening frame 1, the fixed frame 5 is fixedly installed on the inner wall of the screening frame 1, and the sliding block 6 is slidably installed on the fixed frame 5, the connecting rod 7 is rotatably installed inside the sliding block 6, the fixed block 8 is fixedly installed above the screening plate 4, the re-screening frame 9 is slidably installed on the outer wall of the fixed frame 5, and the collecting frame 10 slides through the inner and outer walls of the fixed frame 5. The end of the connecting rod 7 away from the sliding block 6 is rotatably connected to the fixed block 8, and the end of the pushing rod 3 away from the linear motor 101 is rotatably connected to the bottom of the screening plate 4. The screening plate 4 swings to repeatedly throw up the raw materials, thereby improving the screening efficiency of the raw materials. At the same time, the raw materials that do not meet the standards will gradually move downward and enter the interior of the re-screening frame 9. In the process of the re-screening frame 9 moving up and down, the raw materials that do not meet the standards will be re-screened, and some of the raw materials that meet the standards will be screened out, thereby improving the screening effect of the raw materials.

[0021] A discharge port is provided on the surface of the re-screening frame 9, a feed port is provided on the surface of the fixed frame 5, the sliding block 6 is fixedly connected to the re-screening frame 9, a slide groove is provided on the surface of the fixed frame 5, a limit rod 11 is slidably installed on the inner wall of the slide groove, an L-shaped baffle plate 12 is slidably installed on the inner wall of the fixed frame 5, a receiving rod 13 is fixedly installed below the L-shaped baffle plate 12, the collecting frame 10 moves to contact and squeeze the receiving rod 13 to move upward, the receiving rod 13 moves upward to drive the L-shaped baffle plate 12 to move upward, the L-shaped baffle plate 12 moves upward to release the closure of the feed port on the surface of the fixed frame 5, so as to facilitate the collection of raw materials that do not meet the standards during the screening of raw materials, and avoid the collection frame 10 being not installed in place, resulting in the spillage of raw materials that do not meet the standards, thereby affecting the subsequent processing costs.

[0022] The surface of the limit rod 11 is set as bevel surface 1, and the bottom of the receiving rod 13 is set as bevel surface 2. A telescopic elastic rod 14 is set between the limit rod 11 and the inner wall of the slide groove. The telescopic elastic rod 14 is retracted and reset to drive the limit rod 11 to move downward, thereby realizing the limitation of the collection frame 10. A telescopic elastic rod 2 15 is set between the inner walls of the L-shaped baffle 12, and the telescopic elastic rod 2 15 can drive the L-shaped baffle 12 to reset.

[0023] When this embodiment is working: the collecting frame 10 is installed inside the fixed frame 5, the collecting frame 10 moves to contact and squeeze the limit rod 11 to move upward, the limit rod 11 moves upward to squeeze the telescopic elastic rod 14 to contract, and the telescopic elastic rod 14 is retracted and reset to drive the limit rod 11 to move downward, thereby realizing the limitation of the collecting frame 10. At this time, the collecting frame 10 moves to contact and squeeze the receiving rod 13 to move upward, the receiving rod 13 moves upward to drive the L-shaped baffle plate 12 to move upward, and the L-shaped baffle plate 12 moves upward to release the closure of the feed port on the surface of the fixed frame 5, which is convenient for collecting raw materials that do not meet the standards during the screening process of raw materials, avoiding the collection frame 10 from being installed in place and causing the raw materials that do not meet the standards to fall, thereby affecting the subsequent processing costs, and then starting the linear motor 101, the output end of the linear motor 101 reciprocates to drive the push rod 3 to move reciprocally, and the push rod 3 reciprocates The movement drives the screening plate 4 to swing, and the swing of the screening plate 4 repeatedly throws up the raw materials, thereby improving the screening efficiency of the raw materials. At the same time, the raw materials that do not meet the standards will gradually move downward and enter the interior of the re-screening frame 9. The screening plate 4 swings and drives the fixed block 8 to move. The movement of the fixed block 8 drives the connecting rod 7 to move. The movement of the connecting rod 7 drives the sliding block 6 to move up and down. The up and down movement of the sliding block 6 drives the re-screening frame 9 to move up and down. In the process of the re-screening frame 9 moving up and down, the raw materials that do not meet the standards will be re-screened, and some of the raw materials that meet the standards will be screened out, thereby improving the screening effect of the raw materials. At the same time, in the process of the re-screening frame 9 moving upward, the discharge port on its surface coincides with the feed port on the surface of the fixed frame 5, so that the raw materials that do not meet the standards are collected by the collecting frame 10 through the discharge port and the feed port, which is convenient for subsequent centralized processing, improves the utilization rate of raw materials and reduces the subsequent processing cost.

[0024] See also Figure 1-Figure 7On the basis of the above embodiment, in another embodiment of the present invention, a quantitative device for preventing too much raw material from being added at one time is arranged inside the feed frame 2, and the quantitative device comprises a guide plate 161 and a quantitative frame 162, the guide plate 161 is fixedly mounted on the inner wall of the feed frame 2, and the quantitative frame 162 is slidably mounted on the inner wall of the feed frame 2, and the quantitative device also comprises an inclined rod 163, a moving block 164, an L-shaped plate 165, a connecting rod 166 and a receiving block 167, and the inclined rod 163 is driven to reciprocate during the up and down movement of the sliding block 6, and the reciprocating movement of the inclined rod 163 drives the moving block 164 to move left and right, and the inclined rod 163 is rotatably mounted inside the sliding block 6, and the moving block 164 is 64 is slidably installed on the top of the inner wall of the screening frame 1, the L-shaped plate 165 slides through the inner and outer walls of the feed frame 2, the connecting rod 166 is rotatably installed on the end of the L-shaped plate 165 close to the quantitative frame 162, and the receiving block 167 is fixedly installed below the quantitative frame 162, the end of the inclined rod 163 away from the sliding block 6 is rotatably connected to the moving block 164, and the end of the connecting rod 166 away from the L-shaped plate 165 is rotatably connected to the receiving block 167, and the quantitative frame 162 moves downward to prevent the discharge from the inside of the feed frame 2, and realizes the quantitative intermittent discharge of the raw materials, ensuring that the raw materials processed each time can be fully screened, and can reduce the risk of clogging of the screening plate 4, and maintain the efficient operation of the screening equipment.

[0025] One end of the L-shaped plate 165 away from the connecting rod 166 is slidably connected to the top of the inner wall of the screening frame 1, and a No. 1 spring 168 is arranged between the L-shaped plate 165 and the outer wall of the feed frame 2. The No. 1 spring 168 can reset the L-shaped plate 165. A feed hole is provided on the surface of the quantitative frame 162. The quantitative frame 162 moves upward so that the raw materials inside the feed frame 2 enter the interior of the quantitative frame 162 through the feed hole.

[0026] The bottom of the inner wall of the quantitative frame 162 is set as a second beveled surface, and the outer wall of the quantitative frame 162 is slidably connected to the material guide plate 161. The second beveled surface can facilitate the discharge of the raw materials.

[0027] The interior of the feed frame 2 is provided with a spreading device for preventing the accumulation and discharge of raw materials, and the spreading device includes a spreading plate 171 and a smearing plate 172. The spreading plate 171 is fixedly mounted on the inner wall of the feed frame 2, and the smearing plate 172 is slidably mounted on the inner wall of the feed frame 2. The spreading device also includes a toggle rod 173, a connecting plate 174, a U-shaped plate 175 and a receiving shaft 176. When the L-shaped plate 165 moves toward the direction close to the feed frame 2, it drives the toggle rod 173 to move. The toggle rod 173 is fixedly mounted below the L-shaped plate 165. A toggle groove is provided on the surface of the feed frame 2, and the connecting plate 174 is slidably mounted on the inner wall of the feed frame 2. Inside the toggle groove, the U-shaped plate 175 is fixedly installed on the outer wall of the feed frame 2, and the receiving shaft 176 slides through the left and right walls of the connecting plate 174. The connecting plate 174 is fixedly connected to the squeegee plate 172. A wave groove 177 is provided on the surface of the connecting plate 174. The reciprocating movement of the connecting plate 174 drives the squeegee plate 172 to move reciprocally. The reciprocating movement of the squeegee plate 172 can evenly discharge the raw materials on its surface through the spreading plate 171 onto the surface of the screening plate 4. The dispersed discharge can improve the screening efficiency of the screening plate 4 for the raw materials, and avoid the accumulation of too much raw materials at the same position, which leads to reduced fluidity of the raw materials.

[0028] The receiving shaft 176 is fixedly connected to the U-shaped plate 175. A No. 2 spring 178 is provided between the U-shaped plate 175 and the connecting plate 174. The No. 2 spring 178 can drive the connecting plate 174 to reset, thereby improving the stability of the connecting plate 174 during movement and further improving the screening efficiency of the raw materials.

[0029] When the present embodiment is working, the sliding block 6 moves up and down, driving the inclined rod 163 to move back and forth, the inclined rod 163 moves back and forth, driving the moving block 164 to move left and right, and when the moving block 164 moves toward the direction close to the feed frame 2, it contacts and squeezes the L-shaped plate 165 to move, and the L-shaped plate 165 moves, driving the connecting rod 166 to move, and the connecting rod 166 moves, driving the receiving block 167 to move upward, and the receiving block 167 moves upward, driving the quantitative frame 162 to move upward, and the quantitative frame 162 moves upward so that the raw materials inside the feed frame 2 enter the inside of the quantitative frame 162 through the feed hole, and the L-shaped plate 165 moves. During the movement, spring No. 168 is squeezed to contract. After contraction, spring No. 168 resets to drive the L-shaped plate 165 to move away from the feed frame 2, and under the action of the connecting rod 166 and the receiving block 167, the quantitative frame 162 moves downward. The quantitative frame 162 moves downward to prevent the discharge from the inside of the feed frame 2, and realizes the quantitative intermittent discharge of the raw materials, ensuring that the raw materials processed each time can be fully screened, and can reduce the risk of clogging of the screening plate 4, maintain the efficient operation of the screening equipment, and at the same time, can effectively avoid the leakage of raw materials when the equipment stops working, thereby improving the utilization rate of raw materials.

[0030] When the L-shaped plate 165 moves toward the direction close to the feed frame 2, it drives the toggle rod 173 to move. The toggle rod 173 moves to contact the wave groove 177 on the surface of the connecting plate 174 and drives the connecting plate 174 to move back and forth under its action. The reciprocating movement of the connecting plate 174 drives the squeegee 172 to move back and forth. The reciprocating movement of the squeegee 172 can evenly discharge the raw materials on its surface into the surface of the screening plate 4 through the spreading plate 171. The dispersed discharge can improve the screening efficiency of the screening plate 4 for the raw materials and avoid the accumulation of too much raw materials at the same position, which leads to a decrease in the fluidity of the raw materials. At the same time, the connecting plate 174 moves to squeeze the No. 2 spring 178 to contract. After the No. 2 spring 178 contracts, it resets to make the connecting plate 174 reciprocate, thereby improving the stability of the connecting plate 174 during the movement and further improving the screening efficiency of the raw materials.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A screening device for sodium carboxymethyl cellulose production, comprising a screening frame (1), a linear motor (101) being fixedly mounted on the outer wall of the screening frame (1), and a feed frame (2) being fixedly penetrated above the screening frame (1), characterized in that: Also includes: A screening device, the screening device comprising a push rod (3), a screening plate (4), a fixed frame (5), a sliding block (6), a connecting rod (7), a fixed block (8), a re-screening frame (9) and a collecting frame (10), wherein the push rod (3) rotates and passes through the output end of the linear motor (101), the screening plate (4) is rotatably mounted on the inner wall of the screening frame (1), the fixed frame (5) is fixedly mounted on the inner wall of the screening frame (1), the sliding block (6) is slidably mounted on the outer wall of the fixed frame (5), the connecting rod (7) is rotatably mounted inside the sliding block (6), the fixed block (8) is fixedly mounted above the screening plate (4), the re-screening frame (9) is slidably mounted on the outer wall of the fixed frame (5), the collecting frame (10) slides through the inner and outer walls of the fixed frame (5), the end of the connecting rod (7) away from the sliding block (6) is rotatably connected to the fixed block (8), and the end of the push rod (3) away from the linear motor (101) is rotatably connected to the bottom of the screening plate (4); Wherein, a quantitative device for preventing excessive feeding of raw materials at one time is arranged inside the feed frame (2), and the quantitative device comprises a material guide plate (161) and a quantitative frame (162), wherein the material guide plate (161) is fixedly mounted on the inner wall of the feed frame (2), and the quantitative frame (162) is slidably mounted on the inner wall of the feed frame (2); A material spreading device for preventing the accumulation and discharge of raw materials is arranged inside the feed frame (2), and the material spreading device comprises a material spreading plate (171) and a smearing plate (172), wherein the material spreading plate (171) is fixedly mounted on the inner wall of the feed frame (2), and the smearing plate (172) is slidably mounted on the inner wall of the feed frame (2).

2. A screening device for sodium carboxymethylcellulose production according to claim 1, characterized in that: The surface of the re-screening frame (9) is provided with a discharge port, the surface of the fixed frame (5) is provided with a feed port, the sliding block (6) is fixedly connected to the re-screening frame (9), the surface of the fixed frame (5) is provided with a slide groove, the inner wall of the slide groove is slidably mounted with a limit rod (11), the inner wall of the fixed frame (5) is slidably mounted with an L-shaped baffle (12), and a receiving rod (13) is fixedly mounted below the L-shaped baffle (12).

3. A screening device for sodium carboxymethylcellulose production according to claim 2, characterized in that: The surface of the limiting rod (11) is arranged as a first beveled surface, the lower portion of the receiving rod (13) is arranged as a second beveled surface, a first telescopic elastic rod (14) is arranged between the limiting rod (11) and the inner wall of the slide groove, and a second telescopic elastic rod (15) is arranged between the inner walls of the L-shaped baffle plate (12).

4. A screening device for sodium carboxymethylcellulose production according to claim 3, characterized in that: The quantitative device further comprises an inclined rod (163), a moving block (164), an L-shaped plate (165), a connecting rod (166) and a receiving block (167); the inclined rod (163) is rotatably mounted inside the sliding block (6); the moving block (164) is slidably mounted on the top of the inner wall of the screening frame (1); the L-shaped plate (165) slides through the inner and outer walls of the feeding frame (2); the connecting rod (166) is rotatably mounted on one end of the L-shaped plate (165) close to the quantitative frame (162); the receiving block (167) is fixedly mounted below the quantitative frame (162); the end of the inclined rod (163) away from the sliding block (6) is rotatably connected to the moving block (164); and the end of the connecting rod (166) away from the L-shaped plate (165) is rotatably connected to the receiving block (167).

5. A screening device for sodium carboxymethylcellulose production according to claim 4, characterized in that: One end of the L-shaped plate (165) away from the connecting rod (166) is slidably connected to the top of the inner wall of the screening frame (1), a No. 1 spring (168) is provided between the L-shaped plate (165) and the outer wall of the feed frame (2), and a feed hole is provided on the surface of the quantitative frame (162).

6. A screening device for sodium carboxymethylcellulose production according to claim 5, characterized in that: The bottom of the inner wall of the quantitative frame (162) is arranged as a second beveled surface, and the outer wall of the quantitative frame (162) is slidably connected to the material guide plate (161).

7. A screening device for sodium carboxymethylcellulose production according to claim 6, characterized in that: The material spreading device further comprises a toggle rod (173), a connecting plate (174), a U-shaped plate (175) and a receiving shaft (176); the toggle rod (173) is fixedly mounted below the L-shaped plate (165); a toggle groove is provided on the surface of the feed frame (2); the connecting plate (174) is slidably mounted inside the toggle groove; the U-shaped plate (175) is fixedly mounted on the outer wall of the feed frame (2); the receiving shaft (176) slidably penetrates the left and right walls of the connecting plate (174); the connecting plate (174) is fixedly connected to the trowel plate (172); and a wave groove (177) is provided on the surface of the connecting plate (174).

8. A screening device for sodium carboxymethylcellulose production according to claim 7, characterized in that: The receiving shaft (176) is fixedly connected to the U-shaped plate (175), and a No. 2 spring (178) is provided between the U-shaped plate (175) and the connecting plate (174).

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