Crystal filtering device for cephalosporin production

Abstract

The invention discloses a cephalosporin production crystal filtering device which comprises a filter, and a filter tank and a crystal conveying structure are arranged in the filter; the strip-shaped filter screen is arranged in the filter, the strip-shaped filter screen is configured to periodically pass through the filter tank and be attached to the inner wall of the filter tank to form sunken movement, the strip-shaped filter screen is provided with a plurality of partition plates with filter holes, the bottom of the filter tank is communicated with a liquid output pipe, and the strip-shaped filter screen is matched with the filter tank, so that a sunken part can be formed in the filter tank; according to the crystal conveying structure, input liquid with crystals is filtered, filtrate penetrates through a strip-shaped filter screen to be output through a liquid output pipe at the bottom, the crystals are conveyed from a low position to a high position under the conveying of the strip-shaped filter screen, and the crystals are separated from the strip-shaped filter screen to fall into the crystal conveying structure to be collected and conveyed after being conveyed to a certain degree under the action of gravity; and continuous and high-efficiency crystal filtration is realized.

Description

Technical Field

[0001] The invention relates to the technical field of solid-liquid separation, in particular to a cephalosporin production crystal filtering device. Background Art

[0002] The preparation of cephalosporin tablets usually includes two steps: first, a solution is obtained through a salt-forming reaction, and then crystals are obtained by a solution crystallization method. During the crystal preparation process, the crystal mixture needs to be filtered and separated.

[0003] In the prior art, Chinese patent application number: 202211671938.7 discloses a crystal filtering device for preparing cefuroxime, which is provided with a filter belt that is easy to bend, and an isolation top cylinder for bending the filter belt is provided below the filter belt, so as to ensure that during the filtration process, the filter belt is pulled downward by the traction of the filter coil in the filter belt, so that the filter belt is pressed on the isolation top cylinder, and the crystal mixed liquid in the filter medicine chamber is partitioned according to the bending of the filter belt. After filtration, the middle part of the filter belt is pushed up according to the isolation top cylinder to realize the cone shape of the filter belt, so that the crystals are concentrated on the outside of the filter belt, so as to ensure that the middle part can reduce the obstruction of the crystals during filtration, and finally achieve the purpose of rapid filtration by partition; the zoning treatment can only prevent the crystals from settling to a certain extent, and the crystal accumulation area will still affect the filtration efficiency. In addition, residual liquid will be left on the crystals after filtration, affecting the filtration effect. Therefore, a crystal filtering device for cephalosporin production is urgently needed to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to provide a cephalosporin production crystal filtering device, which can effectively solve the problems existing in the above-mentioned prior art.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solution: a cephalosporin production crystal filtering device, comprising: A filter, wherein a filter tank and a crystal conveying structure are provided in the filter; A belt-shaped filter screen is arranged in the filter, and the belt-shaped filter screen is configured to periodically pass through the filter tank and fit the inner wall of the filter tank to form a concave movement. A plurality of partitions with filter holes are arranged on the belt-shaped filter screen, and a liquid output pipe is connected to the bottom of the filter tank; and The belt-shaped filter is configured to periodically pass through the crystal conveying structure, and the side of the belt-shaped filter carrying the crystal faces the crystal conveying structure; The crystal conveying structure includes a collecting plate and a crystal output tube. The collecting plate is used to collect crystals in a specified direction. One end of the crystal output tube is connected to the collecting point of the collecting plate. The crystal output tube is used to output the collected crystals.

[0006] Preferably, the filter is an annular structure, the filter groove is located at the bottom end of the filter, the belt filter is arranged in an annular shape inside the filter, the collecting plate is arranged in the middle of the filter, and the opening is vertically oriented in a trumpet shape.

[0007] Preferably, the collecting plate comprises a pair of symmetrically arranged special-shaped plates, wherein the end of the special-shaped plate away from the collecting point is the distal end, and the end close to the collecting point is the proximal end, the special-shaped plate is in a state of gradually contracting from the distal end to the proximal end, and the special-shaped plate as a whole is bent on both sides toward the center direction.

[0008] Preferably, at least one side of the belt-shaped filter screen is provided with a side strip, a flexible rack is mounted on the side strip, a groove is provided in the filter at a position corresponding to the side strip, a plurality of driving structures are provided in the filter along the groove, the side strip is inserted into the groove, and the flexible rack is connected to the driving structure, and the driving structure drives the rack to drive the side strip and the belt-shaped filter screen to slide along the groove; and A sealing strip is installed between the edge strip and the belt-shaped filter screen, and the sealing strip is used to seal the opening of the channel.

[0009] Preferably, an arc-shaped jet plate is installed on the filter, and an air pump is installed on the filter above the top of the belt-shaped filter screen. The output end of the air pump is connected to the arc-shaped jet plate, and the air pump sprays gas toward the belt-shaped filter screen through the arc-shaped jet plate.

[0010] Preferably, a guide structure is installed in the filter between the belt-shaped filter screen and the crystal conveying structure; the guide structure comprises: A guide bar, wherein the guide bar is in a vertically curved arc structure, and the shape of the guide bar matches the shape of the belt-shaped filter screen in the area above the guide bar; and The guide strip is a filter structure.

[0011] Preferably, the guiding structure comprises: A shell, wherein an arc groove is formed on the top of the shell, the guide bar is installed in the arc groove, and output ports inclined toward the collecting plate are formed at both ends of the arc groove of the shell; A cavity is provided in the shell, a negative pressure channel is arranged in the cavity, the negative pressure channel is communicated with the guide bar, and the negative pressure channel is configured to generate negative pressure at the guide bar.

[0012] Preferably, a reciprocating mechanism is also installed in the shell, the reciprocating mechanism includes a plurality of connecting rod structures, one end of the connecting rod structure is connected to the guide bar, and the reciprocating mechanism is configured to periodically control the vertical upward bending and resetting operation of the guide bar.

[0013] Preferably, the connecting rod structure comprises a piston rod and a barrel rod, wherein one end of the piston rod with a piston is inserted into the barrel rod, and the other end is connected to the guide bar, and the barrel rod is open at one end away from the piston rod; A push plate is disposed in the negative pressure channel, and the push plate is configured to reciprocate along the negative pressure channel; and The negative pressure channel is also connected to the cavity, and when the push plate moves back and forth, suction is periodically generated toward the guide strip and the cavity; The open end of the barrel rod is connected to the negative pressure channel, and the push plate is also configured to generate a force on the guide bar when moving, controlling the guide bar to preferentially or simultaneously generate suction on the guide bar to form a vertical upward bend.

[0014] Preferably, the connecting rod structure comprises a first connecting rod structure and a second connecting rod structure; the piston rod of the first connecting rod structure is connected to the end of the guide bar, and the piston rod of the second connecting rod structure is connected to the middle of the guide bar; and The cylinder rod opening of the first connecting rod structure is connected with the cylinder rod opening of the second connecting rod structure through an intermediate channel. The push plate is also configured to push the gas in the intermediate channel into the cylinder rod of the first connecting rod structure when suction is generated at the guide strips, and at the same time absorb the gas in the cylinder rod of the second connecting rod structure into the intermediate channel, so that the piston rod of the first connecting rod structure extends and the piston rod of the second connecting rod structure contracts.

[0015] Beneficial effects: In the present invention, a concave portion can be formed at the filter tank by cooperating with the belt filter screen to filter the input liquid with crystals, and the filtrate passes through the belt filter screen and is output from the liquid output pipe at the bottom. The crystals are transported from a low place to a high place under the transportation of the belt filter screen, and under the action of gravity, after being transported to a certain extent, they are separated from the belt filter screen and fall into the crystal conveying structure for collection and transportation; wherein, the arc-shaped jet plate can better separate the crystals on the belt filter screen, and cooperate with the guide structure to receive the falling crystals and more smoothly enter the crystal conveying structure; In addition, with the cooperation of the guide bar, the negative pressure channel, the connecting rod structure and the push plate, negative pressure can be formed under the guide bar to absorb the residual liquid on the crystal. At the same time, the guide bar can be controlled to deform and bend upward, thereby temporarily retaining the crystal and better handling the residual liquid. When the negative pressure disappears, the guide bar is reset to guide the crystal to fall into the crystal conveying structure. This process is repeated to improve the extraction and filtration effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0017] In the attached picture: Figure 1 It is a structural schematic diagram of the filtering device of the present invention from one perspective; Figure 2 is a schematic structural diagram of the filtering device of the present invention from another perspective; Figure 3 It is a schematic diagram of the structure inside the filter of the present invention; Figure 4 is a plan view of the interior of the filter of the present invention; Figure 5 It is a schematic diagram of the flexible rack structure driven by the driving structure of the present invention; Figure 6 It is a schematic diagram of the structure in the negative pressure channel of the present invention; Numbers in the figure: 1. filter; 2. liquid input pipe; 3. liquid output pipe; 4. crystal output pipe; 5. filter tank; 6. belt filter; 61. partition; 62. side strip; 63. flexible rack; 64. sealing strip; 7. collecting plate; 8. groove; 9. driving structure; 91. driving motor; 92. driving gear; 10. arc-shaped jet plate; 11. air pump; 121. shell; 122. guide strip; 123. arc-shaped groove; 124. output port; 125. cavity; 126. negative pressure channel; 13. first connecting rod structure; 14. second connecting rod structure; 131 / 141. piston rod; 132 / 142. cylinder rod; 15. intermediate channel; 16. push plate; 17. elastic structure. DETAILED DESCRIPTION

[0018] The embodiments of the present invention are described below in conjunction with the drawings in the embodiments of the present invention. The terms used in the implementation mode of the present invention are only used to explain the specific embodiments of the present invention, and are not intended to limit the present invention. The embodiments of the present application are described below in conjunction with the drawings.

[0019] Example: Figure 1-Figure 2 As shown, a cephalosporin production crystal filtering device comprises a filter 1, a liquid input pipe 2 is arranged on one side of the filter 1, the liquid input pipe 2 is used to input the liquid with crystals into the filter 1, a liquid output pipe 3 is arranged at the bottom of the filter 1, and is used to output the filtered liquid, and a crystal output pipe 4 is arranged on one side of the filter 1, and is used to output the crystals obtained by filtration; For filter 1, refer to Figure 3-Figure 4 As shown, the filter 1 is a ring-like structure, a filter tank 5 is arranged in the filter 1, and the filter tank 5 is located at the bottom of the filter 1, and a belt-shaped filter screen 6 is arranged in a ring-like manner inside the filter 1, referring to Figure 3As shown, the belt filter 6 is configured to pass through the filter tank 5 periodically, and fit on the inner wall of the filter tank 5 to form a concave movement, and a plurality of partitions 61 with filter holes are arranged on the belt filter 6, and the bottom of the filter tank 5 is connected to a liquid output pipe 3; and the belt filter 6 is configured to pass through the crystal conveying structure periodically, and the belt filter 6 carries crystals on one side facing the crystal conveying structure; the crystal conveying structure is arranged in the area below the top of the belt filter 6, and the crystal conveying structure includes a collecting plate 7 and a crystal output pipe 4, the collecting plate 7 is used to collect crystals in a specified direction, one end of the crystal output pipe 4 is connected to the collecting point of the collecting plate 7, and the crystal output pipe 4 is used to output the collected crystals; wherein the collecting plate 7 is arranged in the middle of the filter 1, and the opening is arranged vertically in a trumpet shape; During operation, liquid with crystals is transported into the filter tank 5 through the liquid input pipe 2, and the crystals in the liquid are intercepted by the belt filter 6. The filtered liquid passes through the belt filter 6 and is output from the liquid output pipe 3 below. The liquid intercepted on the belt filter 6 is continuously transported toward the crystal transport structure as the belt filter 6 rotates. As the belt filter 6 changes direction, the crystals on it are separated from the belt filter 6 by gravity and fall onto the collecting plate 7. After being collected by the collecting plate 7, they are output from the crystal output pipe 4, completing the continuous filtering function. Among them, reference Figure 3-Figure 4 As shown, a plurality of partitions 61 are evenly arranged on the belt filter 6, which are used to divide the belt filter 6 into a plurality of spaces. The partitions 61 can push the crystals on the belt filter 6 to be stably transmitted along the belt filter 6, and guide the crystals to slide downward and detach when the belt filter 6 changes direction.

[0020] Among them, reference Figure 3 As shown, for the collecting plate 7, the collecting plate 7 includes a pair of symmetrically arranged special-shaped plates, the end of the special-shaped plate away from the collecting point is the distal end, and the end close to the collecting point is the proximal end, and the special-shaped plate is in a state of gradually shrinking from the distal end to the proximal end. The special-shaped plate with this structure can accept the crystals falling from the belt filter 6 in a larger area, and continuously collect the accepted crystals to a fixed point, and the special-shaped plate as a whole is bent on both sides toward the center direction to prevent the crystals from detaching from the special-shaped plate during transportation.

[0021] In a specific embodiment, for the transport of the belt filter 6, refer to Figure 3 and Figure 5As shown, a side strip 62 is provided on at least one side of the strip filter 6, and a flexible rack 63 is installed on the side strip 62. A groove 8 is provided in the filter 1 at a position corresponding to the side strip 62. A plurality of driving structures 9 are provided in the filter 1 along the groove 8. The side strip 62 is inserted into the groove 8, and the flexible rack 63 is connected to the driving structure 9. The driving structure 9 drives the rack to drive the side strip 62 and the strip filter 6 to slide along the groove 8. The driving structure 9 can be set according to demand, for example, a driving motor 91 is provided, and a driving gear 92 is provided on the motor. The driving gear 92 is meshed with the rack, and the driving motor 91 drives the driving gear 92 to rotate, thereby driving the rack to move, and synchronously driving the side strip 62 and the strip filter 6 to move. The above structure can be arranged on both sides of the belt filter 6 to improve the transmission stability; In addition, a sealing strip 64 is installed between the edge strip 62 and the belt-shaped filter screen 6 , and the sealing strip 64 is used to seal the opening of the channel 8 to prevent liquid from entering the channel 8 .

[0022] In a specific embodiment, reference Figure 2 and Figure 3 As shown, an arc-shaped jet plate 10 is installed on the filter 1, and an air pump 11 is installed on the filter 1 above the top of the belt-shaped filter screen 6. The output end of the air pump 11 is connected to the arc-shaped jet plate 10, and the air pump 11 sprays gas toward the belt-shaped filter screen 6 through the arc-shaped jet plate 10.

[0023] As the above-mentioned belt filter 6 is transported, the arc-shaped air jet plate 10 is used to jet air to the portion of the belt filter 6 that moves to the top of the filter 1, thereby accelerating and cleaning the crystals on the belt filter 6 to separate and avoid the crystals from being stuck on the belt filter 6; refer to Figure 3 As shown, a guide structure is installed in the filter 1 between the belt filter 6 and the crystal conveying structure; the guide structure includes a guide bar 122, the guide bar 122 is a vertically curved arc structure, and the shape of the guide bar 122 matches the shape of the belt filter 6 in the area above the guide bar 122; and the guide bar 122 is a filter structure.

[0024] The guide strip 122 is used to carry the crystals falling from the belt-shaped filter screen 6, buffer the force of the crystals falling, and make them slide stably toward the collecting plate 7 below; In a specific embodiment, reference Figure 3As shown, the guide structure includes a shell 121, a top of the shell 121 is provided with an arc groove 123, a guide bar 122 is installed in the arc groove 123, the arc groove 123 can limit the falling crystal to stably move on the guide bar 122, and output ports 124 inclined toward the collecting plate 7 are provided at both ends of the shell 121 at the arc groove 123 to buffer the acceleration of the crystal falling from both ends of the guide bar 122 and change the sliding direction of the crystal to move toward the collecting plate 7 below; In addition, a cavity 125 is provided in the housing 121, and a negative pressure channel 126 is arranged in the cavity 125. The negative pressure channel 126 is connected to the guide bar 122, and the negative pressure channel 126 is configured to generate negative pressure on the guide bar 122. The negative pressure can generate suction on the guide bar 122, so that the residual liquid on the crystal falling on the guide bar 122 is guided into the negative pressure channel 126, and output along the negative pressure channel 126, so as to clean the residual liquid and improve the filtering effect. In addition, refer to Figure 4-Figure 6 As shown, a reciprocating mechanism is also installed in the housing 121, and the reciprocating mechanism includes a plurality of connecting rod structures, one end of the connecting rod structure is connected to the guide bar 122, and the reciprocating mechanism is configured to periodically control the guide bar 122 to bend vertically upward and reset.

[0025] Among them, the internal negative pressure of the negative pressure channel 126 is set to be intermittent. When negative pressure is generated in the negative pressure channel 126, or before negative pressure is generated, the reciprocating mechanism controls the connecting rod structure to drive the guide bar 122 to bend vertically upward, so that the crystals are gathered on the guide bar 122, and as the guide bar 122 bends, it is easier for the residual liquid on the crystals on the guide bar 122 to flow into the negative pressure channel 126 along the filter holes. After the negative pressure in the negative pressure channel 126 disappears, the reciprocating mechanism controls the guide bar 122 to reset. At this time, the crystals slide down along the guide bar 122 to the collecting plate 7 below for collection.

[0026] In a specific embodiment, reference Figure 3 and Figure 6 As shown, the connecting rod structure includes a piston rod 131 / 141 and a barrel rod 132 / 142, wherein the piston rod 131 / 141 has a piston at one end inserted into the barrel rod 132 / 142, and the other end is connected to the guide bar 122, and the barrel rod 132 / 142 is open at one end away from the piston rod 131 / 141; a push plate 16 is provided in the negative pressure channel 126, and the push plate 16 is configured to reciprocate along the negative pressure channel 126; and the negative pressure channel 126 is also connected to the cavity 125, and when the push plate 16 reciprocates, suction is periodically generated toward the guide bar 122 and the cavity 125; the open end of the barrel rod 132 / 142 is connected to the negative pressure channel 126, and the push plate 16 is also configured to generate a force toward the guide bar 122 when moving, so as to control the guide bar 122 to preferentially or simultaneously generate suction at the guide bar 122, thereby forming a vertical upward bend.

[0027] Among them, the connecting rod structure includes a first connecting rod structure 13 and a second connecting rod structure 14; the piston rod 131 / 141 of the first connecting rod structure 13 is connected to the end of the guide strip 122, and the piston rod 131 / 141 of the second connecting rod structure 14 is connected to the middle of the guide strip 122; and the opening of the barrel rod 132 of the first connecting rod structure 13 is connected to the opening of the barrel rod 142 of the second connecting rod structure 14 through the intermediate channel 15, and the push plate 16 is also configured to push the gas in the intermediate channel 15 into the barrel rod 132 of the first connecting rod structure 13 when suction is generated at the guide strip 122, and at the same time absorb the gas in the barrel rod 142 of the second connecting rod structure 14 into the intermediate channel 15, so that the piston rod 131 / 141 of the first connecting rod structure 13 extends and the piston rod 131 / 141 of the second connecting rod structure 14 contracts.

[0028] by Figure 6 For example, when the negative pressure channel 126 generates negative pressure, Figure 6 The right side is the negative pressure direction. Negative pressure can be generated by external negative pressure equipment. Through the effect of negative pressure, on the one hand, the airflow on the guide strip 122 can be guided into the negative pressure channel 126, and the residual liquid can be guided into the negative pressure channel 126. On the other hand, the push plate 16 can be pulled toward Figure 6 The push plate 16 moves to the right, and part of the push plate 16 is in the middle channel 15. As the push plate 16 moves, on the one hand, gas is absorbed from the cavity into the negative pressure channel 126 to allow the push plate 16 to move normally. On the other hand, the part located in the middle channel 15 pushes the airflow in the middle channel 15 into the cylinder rod 132 of the first connecting rod structure 13 on the left, and at the same time absorbs the gas in the cylinder rod 142 of the second connecting rod structure 14 on the right to replenish the middle channel 15. At this time, the piston rod 131 / 141 of the first connecting rod structure extends out, pushing the two ends of the guide bar 122 to bend upward, and the piston rod 131 / 141 of the second connecting rod structure 14 contracts, pulling the middle part of the guide bar 122 to contract downward. Among them, the setting of the middle channel 15 can be arranged according to the specific situation to achieve the above functions, for example, refer to Figure 6 As shown, it is arranged in an S shape; after the negative pressure disappears, an elastic structure 17, such as a spring structure, can be arranged on one side of the push plate 16 to drive the push plate 16 to reset, and at the same time push the airflow in the push plate 16 into the cavity, and push the airflow in the middle channel 15 into the cylinder rod 142 of the second connecting rod structure 14 on the right, and at the same time absorb the gas in the cylinder rod 132 of the first connecting rod structure 13 on the left to replenish the middle channel 15, so as to complete the reset of the guide bar 122, and repeat this process, so as to more effectively deal with the residue on the crystal and improve the crystal filtering effect.

[0029] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. For ordinary technicians in this technical field, after knowing the contents recorded in the present invention, they can make several equivalent changes and substitutions without departing from the principle of the present invention. These equivalent changes and substitutions should also be regarded as belonging to the protection scope of the present invention.

Claims

1. A cephalosporin production crystal filtration device, characterized in that, include: A filter, wherein a filter tank and a crystal conveying structure are provided in the filter; A belt-shaped filter screen is arranged in the filter, and the belt-shaped filter screen is configured to periodically pass through the filter tank and fit the inner wall of the filter tank to form a concave movement. A plurality of partitions with filter holes are arranged on the belt-shaped filter screen, and a liquid output pipe is connected to the bottom of the filter tank; and The belt-shaped filter is configured to periodically pass through the crystal conveying structure, and the side of the belt-shaped filter carrying the crystal faces the crystal conveying structure; The crystal conveying structure includes a collecting plate and a crystal output tube. The collecting plate is used to collect crystals in a specified direction. One end of the crystal output tube is connected to the collecting point of the collecting plate. The crystal output tube is used to output the collected crystals.

2. A cephalosporin production crystal filtering device according to claim 1, characterized in that: The filter is in a ring-like structure, the filter tank is located at the bottom end of the filter, the belt filter is arranged in a ring-like shape inside the filter, the collecting plate is arranged in the middle of the filter, and the opening is arranged vertically in a trumpet shape.

3. A cephalosporin production crystal filtering device according to claim 2, characterized in that: The collecting plate comprises a pair of symmetrically arranged special-shaped plates, wherein the end of the special-shaped plate away from the collecting point is the distal end, and the end close to the collecting point is the proximal end. The special-shaped plate is in a state of gradually contracting from the distal end to the proximal end, and the special-shaped plate as a whole is bent on both sides toward the center direction.

4. A cephalosporin production crystal filtering device according to claim 1, characterized in that: At least one side of the strip filter is provided with a side strip, a flexible rack is installed on the side strip, a groove is provided in the filter at a position corresponding to the side strip, a plurality of driving structures are provided in the filter along the groove, the side strip is inserted into the groove, and the flexible rack is connected to the driving structure, and the driving structure drives the rack to drive the side strip and the strip filter to slide along the groove; as well as A sealing strip is installed between the edge strip and the belt-shaped filter screen, and the sealing strip is used to seal the opening of the channel.

5. A cephalosporin production crystal filtration device according to claim 1, characterized in that: The filter is provided with an arc-shaped jet plate, and an air pump is provided on the filter above the top of the belt-shaped filter screen. The output end of the air pump is connected to the arc-shaped jet plate, and the air pump sprays gas toward the belt-shaped filter screen through the arc-shaped jet plate.

6. A cephalosporin production crystal filtration device according to any one of claims 1 to 5, characterized in that: A guide structure is installed in the filter between the belt-shaped filter screen and the crystal conveying structure; the guide structure includes: A guide bar, wherein the guide bar is in a vertically curved arc structure, and the shape of the guide bar matches the shape of the belt-shaped filter screen in the area above the guide bar; and The guide strip is a filter structure.

7. A cephalosporin production crystal filtration device according to claim 6, characterized in that: The guiding structure comprises: A shell, wherein an arc groove is formed on the top of the shell, the guide bar is installed in the arc groove, and output ports inclined toward the collecting plate are formed at both ends of the arc groove of the shell; A cavity is provided in the shell, a negative pressure channel is arranged in the cavity, the negative pressure channel is communicated with the guide bar, and the negative pressure channel is configured to generate negative pressure at the guide bar.

8. A cephalosporin production crystal filtering device according to claim 7, characterized in that: A reciprocating mechanism is also installed in the shell, and the reciprocating mechanism includes a plurality of connecting rod structures, one end of the connecting rod structure is connected to the guide bar, and the reciprocating mechanism is configured to periodically control the vertical upward bending and resetting operation of the guide bar.

9. A cephalosporin production crystal filtration device according to claim 8, characterized in that: The connecting rod structure comprises a piston rod and a barrel rod, wherein one end of the piston rod with a piston is inserted into the barrel rod, and the other end is connected to the guide bar, and the barrel rod is open at one end away from the piston rod; A push plate is provided in the negative pressure channel, and the push plate is configured to reciprocate along the negative pressure channel; as well as The negative pressure channel is also connected to the cavity, and when the push plate moves back and forth, suction is periodically generated toward the guide strip and the cavity; The open end of the barrel rod is connected to the negative pressure channel, and the push plate is also configured to generate a force on the guide bar when moving, controlling the guide bar to preferentially or simultaneously generate suction on the guide bar to form a vertical upward bend.

10. A cephalosporin production crystal filtration device according to claim 9, characterized in that: The connecting rod structure comprises a first connecting rod structure and a second connecting rod structure; the piston rod of the first connecting rod structure is connected to the end of the guide bar, and the piston rod of the second connecting rod structure is connected to the middle of the guide bar; and The cylinder rod opening of the first connecting rod structure is connected with the cylinder rod opening of the second connecting rod structure through an intermediate channel. The push plate is also configured to push the gas in the intermediate channel into the cylinder rod of the first connecting rod structure when suction is generated at the guide strips, and at the same time absorb the gas in the cylinder rod of the second connecting rod structure into the intermediate channel, so that the piston rod of the first connecting rod structure extends and the piston rod of the second connecting rod structure contracts.

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