CN116020191B - A crystal filtration device for the preparation of ceftronin - Google Patents

Abstract

The present invention relates to the technical field related to solid-liquid separation, and discloses a crystal filtration device for preparing ceftronin. The present invention is provided with an easily bendable filter belt, and is provided with a filter belt below the filter belt. The isolation top cylinder with bending ensures that during the filtration process, the filter belt is pulled downward by the filter coil, causing the filter belt to be pressed against the isolation top cylinder, and the filter material is filtered according to the bending of the filter belt. The crystal mixture in the cavity is filtered in sections. After that, the middle part of the filter belt is raised according to the isolation top cylinder to achieve a tapered shape of the filter belt, so that the crystals are concentrated on the outside of the filter belt, thereby ensuring that the middle part can reduce crystals during filtration. obstacles, and finally achieve the purpose of fast filtering by partition.

Description

A crystal filtration device for the preparation of ceftronin

Technical field

The present invention relates to the technical field related to solid-liquid separation, specifically a crystal filtration device for the preparation of ceftronine.

Background technique

Ceftronin is a long-acting, broad-spectrum antibiotic that is mainly used to prevent and treat mastitis in dairy cows during the drying period.

When preparing ceftronin crystals, it is necessary to filter the crystal mixture and separate most of the mother liquor before obtaining a large amount of ceftronin crystals. During the filtration process, most of the existing crystals are filtered directly through the filter plate. , but in the actual application process, the crystals will precipitate at the bottom, which will reduce the efficiency of transporting the mother liquor to the filter holes during filtration, thus reducing the filtration rate. At the same time, the filter plate will be blocked by crystals, causing the filter plate filtration speed to greatly increase. The reduction affects the extraction rate of crystals.

Contents of the invention

In view of the shortcomings in the existing ceftronine crystal filtration process proposed in the background art, the present invention provides a crystal filtration device for ceftronine preparation, which has the advantage of partitioned rapid filtration and solves the above-mentioned technology proposed in the background art. question.

The present invention provides the following technical solution: a crystal filtration device for the preparation of ceftronin, including a filter tank, a filter chamber is provided inside the filter tank, a filter cover is fixedly installed on the top of the filter tank, and a filter cover is A medicine inlet is provided on the side, and a medicine discharge port is provided at the bottom of the side wall of the filter tank. A filter belt is fixedly installed on the inner wall of the filter tank, and a positioning block is fixedly installed in the middle of the filter belt. The positioning block A return pull plate is fixedly installed at the bottom of the block, and a guide pile located in the middle of the positioning block is fixedly installed in the middle of the inner wall of the filter tank. The return pull plate and the guide pile are movable, and a return spring is fixedly installed at the bottom of the return pull plate. , and one end of the return spring is fixedly connected to the bottom of the inner wall of the filter tank. An isolation top cylinder is movablely installed on the bottom of the filter tank, and the isolation top cylinder is located below the filter belt. The isolation top cylinder pushes the bottom of the filter belt. The filter belt is bent, and the return pull plate is provided with a filter coil that attracts the bottom of the inner wall of the filter tank.

Preferably, a liquid-isolating ring block is movably installed at the bottom of the inner wall of the filter tank, and the bottom of the isolation top cylinder passes through the filter tank and is fixedly installed with the top of the liquid-isolating ring block, and the inner cavity of the filter tank is located in the liquid-isolating ring. A pressurization chamber is formed below the block, a one-way valve is fixedly installed on the inner wall of the filter tank, filter holes are provided on the surface of the filter belt, a drainage channel is provided on the inner wall of the isolation top cylinder, and a drain channel is provided on the inner wall of the isolation top cylinder. A control loop that controls the on and off of the filter coil is fixedly installed at the bottom of the inner wall of the tank.

Preferably, the control loop includes a make contact, a filter coil, a break contact, a protection resistor, a power supply and a normally closed main switch, and is carried out through the power supply, a normally closed main switch, a protection resistor, a filter coil and a break contact. In series connection, only one of the make contact and the break contact can be used. When the make contact is connected, the filter coil does not work. When the break contact is connected, the filter coil is connected, and the break contact is set at The top of the boost chamber and the through contact are located at the bottom of the boost chamber.

Preferably, the bottom area of the liquid-isolating ring block is ten to fifteen times the cross-sectional area of the drainage channel.

Preferably, an installation base is movably installed on the inner wall of the isolation ejector, and an isolation ejector rod is fixedly installed on the surface of the installation base. A drain channel located above the installation base is provided on the side wall of the isolation ejector. When the installation base is impacted upward by the medium in the drain channel, the isolation ejector rod will pass through the filter belt and be located above the filter belt. There are filter holes and slideways on the surface of the filter belt, and there is a gap between the filter holes and the slideway. Alternate connections.

Preferably, the side walls of the guide piles are provided with guide grooves, and the side walls of the guide piles are provided with bumps. The bumps are equidistantly arranged on the side walls of the guide piles, and the bumps are in the shape of a semi-cylinder. , the inner wall of the isolation ejector tube is movably installed with a vibration ejector rod arranged vertically with the guide pile, and one side of the vibration ejector rod is movably installed with the installation base through a cylindrical shaft, and the left and right sides of the vibration ejector rod are provided inside the installation base. The drive slot is movable, and the drive slot is arranged at an angle.

Preferably, a protective sleeve outside the guide pile is fixedly installed on the surface of the positioning block, and the protective sleeve is an elastic bellows.

Preferably, a top limiting ring is fixedly provided on the top of the inner wall of the isolation top cylinder.

The invention has the following beneficial effects:

1. The present invention is provided with a filter belt that is easy to bend, and is provided with an isolation top tube below the filter belt that bends the filter belt, thereby ensuring that during the filtration process, the filter belt passes through the filter belt. The traction of the filter coil pulls downward, causing the filter belt to be pressed against the isolating top cylinder. According to the bending of the filter belt, the crystal mixture in the filter chamber is filtered in zones. After that, the middle part of the filter belt is pushed up according to the isolating top cylinder. , the filter belt is tapered, so that the crystals are concentrated on the outside of the filter belt, thereby ensuring that the middle part can reduce the obstruction of crystals during filtration, and ultimately achieve the purpose of partitioned and rapid filtration.

2. In the present invention, the isolation ejector is provided with a partitioning ejector pin on the top, and the filter belt is provided with filter holes and slides to ensure that after the filter belt is bent and filtered, it is ejected according to the partitioning ejector pin. , not only allows the crystals on the outside of the filter belt to be transported to the middle of the filter belt to avoid filtration obstruction, but also passes through the filter holes and slides through the partition ejector pins in sequence, so that the partition ejector pins can pass through the filter holes. The crystals blocked in the filter holes are squeezed out, ultimately achieving the purpose of avoiding filter obstruction and clearing the blockage in real time.

3. In the present invention, a vibrating ejector pin is provided on the isolation ejector cylinder, so that when the return pull plate pushes the middle part of the filter belt upward, the vibrating ejector pin repeatedly collides with the bump after being ejected, causing the moving drainage channel to be interrupted. The air flow is transported into the pressurizing chamber, so that in the process of the liquid isolating ring block moving upward, the liquid isolating ring block is affected by the pressure change in the pressurizing chamber, prompting the liquid isolating ring block to push the filter belt upward to achieve intermittent Enhanced driving means that the filter belt will vibrate due to the continuous change of driving force, making it easier for the crystals in the filter belt to be transported to the outside of the filter belt after being lifted in the filter belt, ultimately achieving the purpose of easy transport of crystals to the outside. .

Description of the drawings

Figure 1 is a schematic diagram of the overall appearance of the present invention;

Figure 2 is an overall internal three-dimensional schematic diagram of the present invention;

Figure 3 is a schematic diagram of the overall cross-sectional structure of the present invention;

Figure 4 is a schematic diagram of the arrangement of partition and solid ejector rods according to the present invention;

Figure 5 is a schematic diagram of the partial expansion of the filter belt of the present invention;

Figure 6 is a schematic diagram of the circuit layout of the control loop of the present invention.

In the picture: 1. Filter tank; 100. Drug inlet; 101. Drug discharge port; 103. Filter chamber; 104. Filter cover; 105. Pressurization chamber; 2. Protective sleeve; 3. Filter coil; 4. Return journey Pull plate; 5. Return spring; 6. Isolation jack; 600. Top limit ring; 601. Drainage channel; 7. One-way valve; 8. Control circuit; 800. Break contact; 801. Make contact ; 9. Liquid isolation ring block; 10. Drainage channel; 11. Guide pile; 110. Guide groove; 111. Bump; 12. Installation base; 120. Drive groove; 13. Vibrating ejector rod; 14. Filter belt ; 140. Filter hole; 141. Slideway; 15. Isolation ejector rod; 16. Positioning block.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

Referring to Figures 1 to 3, a crystal filtration device for preparing ceftronin includes a filter tank 1, and a filter cavity 103 for placing the crystal mixture is provided inside the filter tank 1. The filter cavity 103 is in the form of The opening is arranged upward, and a filter cover 104 for blocking the filter chamber 103 is fixedly installed on the top of the filter tank 1, and an inlet for injecting mixed liquid into the filter chamber 103 is provided on one side of the filter cover 104. Port 100, and a discharge port 101 for discharging the filtered mother liquor is provided at the bottom of the side wall of the filter tank 1. A filter belt 14 for filtering the crystal mixture is fixedly installed on the inner wall of the filter tank 1, and is installed on the inner wall of the filter tank 1. A positioning block 16 is fixedly installed in the middle of the filter belt 14, a return pull plate 4 is fixedly installed at the bottom of the positioning block 16, and a guide pile 11 located in the middle of the positioning block 16 is fixedly installed in the middle of the inner wall of the filter tank 1, and The return pull plate 4 and the guide pile 11 are movably installed, so that the return pull plate 4 can only move up and down in one direction on the guide pile 11, and a return spring 5 is fixedly installed at the bottom of the return pull plate 4, and the return spring 5 One end is fixedly connected to the bottom of the inner wall of the filter tank 1, and an isolation top cylinder 6 is movablely installed at the bottom of the filter tank 1, and the isolation top cylinder 6 is located below the filter belt 14, and pushes the filter belt through the isolation top cylinder 6 The bottom of 14 causes the filter belt 14 to bend, and the return pull plate 4 is provided with a filter coil 3 that attracts the bottom of the inner wall of the filter tank 1. The filter coil 3 generates magnetism to the bottom of the inner wall of the filter tank 1, causing the return pull plate to 4 will suppress the return spring 5, and drive the filter belt 14 to be pressed against the isolation top cylinder 6, so that the filter belt 14 is bent in an M shape, so that the crystal is located on the outermost side of the filter belt 14, and passes through the filter belt 14. The uppermost floating liquid on the outermost side of 14 will flow into the middle of the filter belt 14, and the crystals on the outside of the filter belt 14 will settle to the outside of the filter belt 14 due to gravity, thereby flowing into the mixed liquid in the middle of the filter belt 14. Reduce the number of crystals, that is, ensure that too few crystals in the middle will not hinder the filtration rate, thereby enhancing the filtration rate.

Referring to Figure 3, a liquid-isolating ring block 9 is movably installed through the bottom of the inner wall of the filter tank 1, and the bottom of the isolating top cylinder 6 passes through the filter tank 1 and is fixedly installed with the top of the liquid-isolating ring block 9, and in the filter tank 1 The inner cavity of the filter tank 1 has a pressurizing chamber 105 located below the liquid-isolating ring block 9, and a one-way valve 7 located on the side of the discharge port 101 is fixedly installed on the inner wall of the filter tank 1. At the same time, on the filter belt 14 A filter hole 140 is provided on the surface for filtering the crystal mixture. At the same time, a drainage channel 10 connected to the pressurization chamber 105 is provided on the inner wall of the isolation top cylinder 6, and a control filter is fixedly installed at the bottom of the inner wall of the filter tank 1. The control loop 8 that turns the coil 3 on and off ensures that during the actual use process, when passing through the liquid isolation ring block 9, the one-way valve 7 sucks in the mother liquid filtered through the filter hole 140, and then passes through the control The circuit 8 turns on the filter coil 3, thereby forcing the liquid-isolating ring block 9 to move downward, and when the liquid-isolating ring block 9 moves downward to suppress the mother liquid in the pressurization chamber 105, it will be ejected through the drain channel 10, thereby The injected mother liquor passes through the filter holes 140 on the filter belt 14, and the filter belt 14 is cleared and clogged to avoid the filter belt 14 slowing down due to clogging, and the one-way valve 7 is set at the discharge point. One side of the port 101, and the current one-way valve 7 mainly achieves one-way communication through a combination of balls and springs. When the medicine discharge port 101 is opened, it can be connected in the medicine discharge port 101 through bolts, and inward according to the bolts. Rotate to open the one-way valve 7, thereby ensuring that when the bolt is turned and opened, the ball in the one-way valve 7 will be pushed up at the same time, so that the mother liquid in the pressurization chamber 105 is also taken out simultaneously, so as to facilitate the subsequent filter belt 14 crystals When taking it out, it can be quickly output by simply turning the filter tank 1 upside down.

Among them, with reference to Figures 3 and 6, the control loop 8 includes a pass contact 801, a filter coil 3, a break contact 800, a protection resistor, a power supply and a normally closed main switch. Through the power supply, the normally closed main switch, and the protection The resistor, filter coil 3 and break contact 800 are connected in series. Only one of the make contact 801 and the break contact 800 can be used. When the make contact 801 is turned on, the filter coil 3 does not work and the break contact 800 is turned on. When the filter coil 3 is turned on, the break contact 800 is set at the top of the pressurization chamber 105 and the make contact 801 is at the bottom of the pressurization chamber 105. The break contact 800 is set on the liquid isolation ring block 9 above the liquid isolating ring block 9 through the through contact 801. When the liquid isolating ring block 9 moves upward according to the elastic force of the return spring 5, the liquid isolating ring block 9 will contact the breaking contact 800, thereby achieving The filter coil 3 is connected, and when the liquid isolation ring block 9 is connected to the through contact 801, the filter coil 3 will be disconnected. Combined with the elastic force of the return spring 5, the return pull plate 4 can push the filter belt 14 moves up and down, and in order to prevent the mother liquor filtered in the middle part of the filter belt 14 from gathering in the inner cavity of the isolation top cylinder 6, an escape groove is provided on the side wall of the isolation top cylinder 6 to ensure the isolation of the top cylinder 6 The inside and outside are connected, so that the mother liquor flowing out of the filter belt 14 can be discharged outward through the discharge port 101.

Referring to Figure 3, the bottom area of the liquid-isolating ring block 9 is ten to fifteen times the cross-sectional area of the drain channel 10, so that there is a certain resistance during the downward movement of the liquid-isolating ring block 9, which prevents the liquid-isolating ring block from being moved down. 9 moves down too fast, causing the filter belt 14 to fall without being filtered.

Among them, with reference to Figures 3 to 5, a mounting base 12 is movablely installed on the inner wall of the isolating top cylinder 6 and located in the drainage channel 10, and a mounting base 12 is fixedly mounted on the surface of the mounting base 12 and is ejected outward from the drainage channel 10. At the same time, a drain channel 601 located above the installation base 12 is provided on the side wall of the isolation ejector 6. When the installation base 12 is impacted upward by the medium in the drain channel 10, the isolation ejector 15 will be It passes through the filter belt 14 and is located above the filter belt 14. According to the medium in the drain channel 10, it will flow out of the drain channel 601, and a filter hole 140 and a slideway 141 are provided on the surface of the filter belt 14. , and the filter holes 140 and the slideways 141 are alternately connected, the number of isolation ejector pins 15 provided on the surface of the installation base 12 is not less than ten, and the filter belt 14 is provided with filter holes corresponding to the isolation ejector pins 15 140 and slideway 141, to ensure that during actual use, through the ejection of the partition ejector pin 15, the partition ejector pin 15 passes through the filter hole 140 and the slideway 141, and is supported by the positioning block on the filter belt 14 During the pulling process of 16, the spacer ejector rod 15 moves in sequence in the filter hole 140 and the slideway 141 to clear the filter hole 140 and the slideway 141, and the extended spacer ejector rod 15 will bring the filter screen with it. The middle part of 14 is blocked from the outside, so that when the external mixed liquid flows to the middle through the partition ejector rod 15, it is filtered according to the spacing between the partition ejector rods 15, and then filtered through the middle part of the filter belt 14 to enhance the filtration. efficiency.

Among them, according to Figure 3, a guide groove 110 is opened on the side wall of the guide pile 11, and a convex block 111 is provided on the side wall of the guide pile 11 and located in the guide groove 110. The number of the convex block 111 is at least eight. And the bumps 111 are equidistantly arranged on the side walls of the guide pile 11. The bumps 111 are in the shape of a semi-cylinder, and a vibrating ejector rod 13 arranged perpendicularly to the guide pile 11 is movably installed on the inner wall of the isolation ejector tube 6, and the vibrating ejector rod 13 is movable. One side of 13 is movably installed with the mounting base 12 through a cylindrical shaft, and a driving slot 120 is provided inside the mounting base 12 to enable the left and right movement of the vibration ejector 13, and the driving slot 120 is arranged obliquely, so that when the mounting base 12 moves upward, The vibrating ejector pin 13 moves toward the mounting base 12 . When the mounting base 12 moves downward, the vibrating ejector pin 13 moves away from the mounting base 12 .

Among them, the protective sleeve 2 outside the guide pile 11 is fixedly installed on the surface of the positioning block 16, and the protective sleeve 2 is an elastic bellows, thereby ensuring that the protective sleeve 2 is always wrapped around the outside of the guide pile 11 to avoid unfiltered mixing. The liquid flows downward from the gap between the guide pile 11 and the positioning block 16 .

By fixing the top limit ring 600 on the top of the inner wall of the isolation ejector cylinder 6 , it is ensured that when the return pull plate 4 is pushed upward, the top limit ring 600 is pushed upward to realize that the isolation ejector cylinder 6 follows the return pull plate 4 upward. sports.

The working principle of the usage method of the present invention is as follows: during use, put the crystal mixture into the filter chamber 103 through the medicine inlet 100. Since the control circuit 8 is not started, the return pull plate 4 will be affected by the return spring. The elastic force of 5 pushes up, so that when the return pull plate 4 moves upward, the top limit ring 600 is simultaneously pushed up, and the top limit ring 600 drives the isolation top cylinder 6 to move upward until the liquid isolation ring block 9 is pressed against the broken contact 800 , at this time, the filter belt 14 is in a conical shape with the highest middle part and the lowest outer part, and the crystal mixture poured through the drug inlet 100 will be placed in the filter chamber 103 .

Referring to Figures 3 and 6, after starting the control loop 8, the filter coil 3 will be energized to generate magnetic force when the broken contact 800 is turned on. The filter coil 3 will attract the bottom of the filter tank 1, which will cause the return pull plate 4 to The positioning block 16 is driven to slide downward on the guide pile 11. When the return pull plate 4 falls, it will move away from the top limit ring 600. At the same time, the downward movement of the positioning block 16 will cause the middle part of the filter belt 14 to be pulled downward first, and the filter belt 14 will be pulled down first. Pressing down the mesh belt 14 will cause the bottom of the filter belt 14 to simultaneously press down on the isolation top cylinder 6. The isolation top cylinder 6 will press down on the liquid isolating ring block 9, and the liquid isolating ring block 9 will be pressed down so that the mother liquor in the boosting chamber 105 is squeezed out. Pressed into the drain channel 10 (the mother liquid existing in the booster chamber 105 will be described later), and as the mother liquid in the drain channel 10 impacts upward, the installation base 12 will move upward, driving the drive groove 120 to move upward, and vibrate Due to the upward movement of the drive groove 120, the ejector pin 13 will move to the right, so that one end of the vibrating ejector pin 13 will be away from the bump 111. When the vibrating ejector pin 13 moves, it will not come into contact with the bump 111, and the upward movement of the ejector pin 13 will cause it to move upward. The installation base 12 will push the isolation ejector pin 15 upward, causing the isolation ejector pin 15 to be ejected from the filter belt 14. The ejection position is located at the filter hole 140 or the slideway 141 of the filter belt 14, and the discharge The mother liquid in the liquid channel 10 will be ejected from the liquid discharge channel 601.

As the middle part of the filter belt 14 continues to move downward, the mother liquid in the pressurization chamber 105 will not be fully output from the drain channel 10, causing the isolation top cylinder 6 to slowly move downward, thereby pushing the bottom of the filter belt 14 upward. Starting, the filter belt 14 is arranged in an M shape, and the mixed liquid located outside the filter belt 14 will cause all the crystals to be located outside, and the mixed liquid will be filtered through the filter belt 14, with the downward movement of the filter belt 14 , causing the middle part of the filter belt 14 to continuously move downward, causing the mixed liquid outside the filter belt 14 to be filtered by the isolation ejector rod 15 and then filtered again through the middle part of the filter belt 14 to prevent the middle part of the filter belt 14 from being blocked by crystals. Reduce the filtration phenomenon, and when the filter belt 14 continuously passes through the partition ejector rod 15 and moves toward the middle, the filter holes 140 and slideways 141 in the filter belt 14 will pass through the partition ejector rod 15 in turn. After passing through the filter hole 140 and the slideway 141, the isolation ejector pin 15 will push out the crystals blocked in the filter hole 140 and the slideway 141, thereby realizing the removal of the blocked filter hole 140 to the filter screen. The middle part of the belt 14 is conveyed to speed up the filtration of the mother liquor in the mixed liquid from the middle part of the filter belt 14.

As the liquid-isolating ring block 9 continues to move downward, the liquid-isolating ring block 9 is brought close to the through contact 801, and after the through contact 801 is connected, the filter coil 3 will no longer work, and the return pull plate 4 will lose its magnetic force. It will move upward under the elastic force of the return spring 5. The upward movement of the return pull plate 4 will pass close to the top limit ring 600 and cause the isolation top cylinder 6 to move upward. At this time, the return pull plate 4 contacts the top limit ring 600, which will cause the isolation The top of the ejector cylinder 6 is closest to the positioning block 16, and the upwardly moving isolation ejector cylinder 6 will pull the liquid-isolating ring block 9 to move upward. The upward movement of the liquid-isolating ring block 9 will reduce the pressure in the pressurizing chamber 105. On the one hand, the mother liquid at the bottom of the inner cavity of the filter tank 1 is pumped into the pressurizing chamber 105 through the one-way valve 7; on the other hand, air flow is drawn in from the drain channel 601 and the drain channel 10. At this time, the installation base 12 The combination of the gravity of the isolation ejector pin 15 and the airflow blowing from the liquid discharge channel 601 to the liquid discharge channel 10 causes the installation base 12 to push downward, causing the installation base 12 to drive the drive groove 120 to move downward simultaneously. The installation base 12 will drive the isolation ejector rod 15 to move downward, and make the isolation ejector rod 15 detach from the filter belt 14 and retract into the drainage channel 10. At this time, because the isolation ejector 6 is close to the filter belt 14, the mixed liquid on the filter belt 14 will arrange the filter belt 14 in a W shape when the filter belt 14 is pressed by gravity, and the downwardly moving drive groove 120 will push the vibrating ejector 13 to the left. The vibration ejector 13 is pushed in the direction of the guide pile 11, thereby blocking the drain channel 10. After the drain channel 10 is blocked, the upward movement rate of the liquid isolation ring block 9 can only pass through the one-way valve. 7. At this time, the liquid isolating ring block 9 moves up relatively slowly, causing the return pull plate 4 to drive the middle part of the filter belt 14 through the positioning block 16 to move up slowly, and the vibration ejector 13 follows the isolation When the ejector tube 6 moves upward, it will be pushed by the bump 111, forcing the vibrating ejector pin 13 to push to the right. The vibrating ejector pin 13 moving to the right will push the drive groove 120 to drive the installation base 12 to move upward. At this time, the partition The fixed ejector rod 15 will not be ejected from the drainage channel 10 and contact the filter belt 14 due to the upward movement of the installation base 12. After the installation base 12 moves upward, the one-way valve 7 and the drainage channel 10 will be filled simultaneously. The medium relieves the pressure in the pressurized chamber 105, causing the liquid-isolating ring block 9 to move upward relatively quickly. As the isolation ejector 6 moves upward again, the vibrating ejector 13 will move to the left again, causing the liquid-isolating ring block 9 to move upward. During the upward movement, the ring block 9 alternately pushes upwards quickly and slowly, causing the positioning block 16 to alternately push upwards quickly and slowly during the speed conversion process, causing the filter belt 14 to vibrate. The vibration will cause the surface of the filter belt 14 to vibrate. The crystals move toward the lower part of the filter belt 14, and the positioning block 16 continues to move upward, which will eventually transform the filter belt 14 into a cone-shaped arrangement with the highest middle part of the filter belt 14 and the lowest side walls, and the cone and filter belt 14 The combination of swings causes the crystals on the surface of the filter belt 14 to gather to the outside of the filter belt 14. Then, the liquid-isolating ring block 9 moves upward until it contacts the broken contact 800, thereby energizing the filter coil 3 again, causing the return pull plate 4 to Go down, and then filter again according to the above.

After filtration is completed, the medicine discharge port 101 is opened so that the mother liquid is output from the medicine discharge port 101, and then the filter cover 104 is taken out, and the crystals on the surface of the filter belt 14 are taken out.

Claims (6)

1. A crystal filtration device for the preparation of ceftronin, including a filter tank (1), characterized in that: a filter chamber (103) is provided inside the filter tank (1), and the top of the filter tank (1) A filter cover (104) is fixedly installed, and a medicine inlet (100) is provided on one side of the filter cover (104). A medicine discharge port (101) is provided at the bottom of the side wall of the filter tank (1). A filter belt (14) is fixedly installed on the inner wall of the tank (1), a positioning block (16) is fixedly installed in the middle of the filter belt (14), and a return pull plate is fixedly installed at the bottom of the positioning block (16) (4), the guide pile (11) located in the middle of the positioning block (16) is fixedly installed in the middle of the inner wall of the filter tank (1), and the return pull plate (4) and the guide pile (11) are movably installed. A return spring (5) is fixedly installed at the bottom of the pull plate (4), and one end of the return spring (5) is fixedly connected to the bottom of the inner wall of the filter tank (1), and an isolation top is movablely installed at the bottom of the filter tank (1). cylinder (6), and the isolation top cylinder (6) is located below the filter belt (14). The isolation cylinder (6) pushes the bottom of the filter belt (14) to cause the filter belt (14) to bend. And the return pull plate (4) is provided with a filter coil (3) that attracts the bottom of the inner wall of the filter tank (1); A liquid-isolating ring block (9) is movably installed at the bottom of the inner wall of the filter tank (1), and the bottom of the isolation top cylinder (6) passes through the filter tank (1) and is fixedly installed with the top of the liquid-isolating ring block (9). The inner cavity of the filter tank (1) and located below the liquid-isolating ring block (9) forms a pressurizing chamber (105). A one-way valve (7) is fixedly installed on the inner wall of the filter tank (1), so The surface of the filter belt (14) is provided with filter holes (140), the inner wall of the isolation top cylinder (6) is provided with a drainage channel (10), and the bottom of the inner wall of the filter tank (1) is fixedly installed with a control The control circuit (8) for switching on and off the filter coil (3); A mounting base (12) is movably installed on the inner wall of the isolation ejector tube (6), and an isolation ejector rod (15) is fixedly installed on the surface of the installation base (12). The side wall of the isolation ejector tube (6) has openings. There is a drain channel (601) located above the installation base (12). When the installation base (12) is impacted upward by the medium in the drain channel (10), the isolation ejector rod (15) will penetrate the filter belt (14). ) and is located above the filter belt (14). The surface of the filter belt (14) is provided with filter holes (140) and slideways (141), and the filter holes (140) and slideways (141) are alternately connected. . 2. A crystal filter device for preparing ceftronin according to claim 1, characterized in that: the control loop (8) includes a pass contact (801), a filter coil (3), and a break contact. (800), protection resistor, power supply and normally closed main switch. The power supply, normally closed main switch, protection resistor, filter coil (3) and break contact (800) are connected in series. Make contact (801) and break contact Point (800) can only be used selectively. When the make contact (801) is turned on, the filter coil (3) does not work. When the break contact (800) is turned on, the filter coil (3) is turned on. The breaking contact (800) is located at the top of the pressurizing chamber (105), and the making contact (801) is located at the bottom of the pressurizing chamber (105). 3. A crystal filtration device for preparing ceftronin according to claim 1, characterized in that: the bottom area of the liquid-isolating ring block (9) is ten to fifteen times the cross-sectional area of the drainage channel (10). times. 4. A crystal filtration device for ceftronin preparation according to claim 1, characterized in that: a guide groove (110) is provided on the side wall of the guide pile (11), and a guide groove (110) is provided on the side wall of the guide pile (11). The side walls are provided with bumps (111). The bumps (111) are equidistantly arranged on the side walls of the guide piles (11), and the bumps (111) are in the shape of a semi-cylinder. The isolation top cylinder (6 ) is movably installed with a vibrating ejector (13) arranged perpendicularly to the guide pile (11), and one side of the vibrating ejector (13) is movably installed with a mounting base (12) through a cylindrical shaft, and the mounting base (12) ) is provided with a driving groove (120) inside to realize the left and right movement of the vibrating ejector rod (13), and the driving groove (120) is arranged obliquely. 5. A crystal filtration device for ceftronin preparation according to claim 1, characterized in that: a protective sleeve (2) outside the guide pile (11) is fixedly installed on the surface of the positioning block (16), and The protective sleeve (2) is an elastic bellows. 6. A crystal filtration device for ceftronin preparation according to claim 1, characterized in that: a top limiting ring (600) is fixedly provided on the top of the inner wall of the isolation top cylinder (6).