Press filter for metronidazole production

Abstract

The utility model discloses a press filter for metronidazole production, which relates to the technical field of press filters and comprises a barrel body for the press filter, a discharge valve arranged at the bottom of the barrel body, a barrel cover arranged on the barrel body, an air inlet arranged on the barrel cover and a conveying device arranged on the barrel cover. The conveying device comprises a feeding pipe fixedly penetrating through the barrel cover, a connecting block is fixedly connected to the bottom of the feeding pipe, a filter plate for filtering a nidazole solution is fixedly connected to the bottom of the fixing block, a through hole for discharging the nidazole solution is formed in the position, above the fixing block, of the feeding pipe, and a supporting device is arranged on the inner wall of the barrel body below the filter plate. The filter plate can be directly taken out when the barrel cover is taken out, the situation that the filter plate needs to be taken out independently is avoided, the fixing plate and the support can effectively support the filter plate, the situation that a filter screen deforms during filter pressing is avoided, and the use effect of the filter screen is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of filter presses, in particular to a filter press for metronidazole production. Background Technique

[0002] The filter press is composed of a liquid holding cup and a filtering funnel. It is characterized in that an air injection lid is arranged on the upper part of the filtering funnel to seal the funnel. The air injection lid is communicated with the inner cavity of the filtering funnel through a one-way valve. A notch is opened at the bottom of the funnel and is communicated with the liquid holding cup. During the drug processing, it is necessary to extract the active ingredients in the drug, and the commonly used device in the drug extraction process is the filter press.

[0003] In the prior art, the utility model patent with the publication number of CN218306445U provides a filter press for metronidazole production, including a filter press barrel body, a filter press barrel cover, a fixed pressing block, a filter screen and a movable block. The filter press barrel cover is installed above the filter press barrel body. A blanking port is installed below the filter press barrel body. A first installation groove is opened inside the left side of the filter press barrel body. A connecting rod is installed above the fixed pressing block. A buffer plate is installed on the right side of the first installation groove. A filter screen is installed between the second installation grooves opened on the left and right sides of the inner wall of the filter press barrel body.

[0004] For this filter press for metronidazole production, when the barrel cover is taken out, the filter screen cannot be directly taken out. The filter screen needs to be taken out separately. The contact surface at the connection between the filter screen and the filter press barrel body is too small, and the filter screen is prone to deformation during pressing. Therefore, we propose a filter press for metronidazole production to solve the above problems. Content of the Utility Model

[0005] The purpose of the utility model is to provide a filter press for metronidazole production to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A filter press for metronidazole production, including a barrel body for the filter press, a discharge valve is arranged at the bottom of the barrel body, a barrel cover is arranged on the barrel body, an air inlet is arranged on the barrel cover, and a feeding device is arranged on the barrel cover. The feeding device is used to input metronidazole solution into the barrel body. The feeding device includes a feeding pipe fixedly penetrating the barrel cover. A connecting block is fixedly connected to the bottom of the feeding pipe. A filter plate for filtering nitrozole solution is fixedly connected to the bottom of the fixed block. A through hole for discharging nitrozole solution is arranged on the feeding pipe above the fixed block. A supporting device is arranged on the inner wall of the barrel body below the filter plate.

[0007] Preferably, the supporting device is used to support the filter plate.

[0008] Preferably, the supporting device includes a fixing seat provided on the inner wall of the barrel body, and a bracket for supporting the filter plate is provided at the inner circle of the bottom of the fixing seat.

[0009] Preferably, the feed pipe penetrates through the center of the barrel cover, the connecting block is of a cylindrical structure, and the connecting block is used to fix the filter plate on the feed pipe.

[0010] Preferably, the filter plate is of a circular filter mesh structure, a rubber layer is provided on the curved surface of the filter plate, and a plurality of through holes are provided and evenly distributed on the lower half of the feed pipe.

[0011] Preferably, the diameter of the filter plate is less than or equal to the inner diameter of the barrel body.

[0012] Preferably, the fixing seat is of an annular structure, the inner diameter of the fixing seat is smaller than the diameter of the filter plate, and the fixing seat is located in the lower half of the barrel body.

[0013] Preferably, the bracket is below the filter plate, and the top end of the bracket is on the same horizontal line as the top end of the fixing seat.

[0014] Preferably, the bracket is fixedly connected by a plurality of round pipes.

[0015] Preferably, the barrel cover and the barrel body are connected by fixing pieces, and lifting lugs are provided on the barrel cover outside the feed pipe.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] 1. Move the barrel cover to cover the barrel body. Through the feed pipe and the connecting block, the filter screen is moved into the barrel body. The metronidazole solution enters the barrel body of the filter press through the feed pipe. The metronidazole solution flows out from the through holes through the feed pipe and falls onto the filter plate, changing the liquid outlet direction to avoid directly discharging and impacting the filter plate. At the same time, the inside of the barrel body is pressurized through the air inlet, so as to filter the metronidazole solution. The filtered metronidazole solution falls to the bottom inside the barrel body. Open the discharge valve to collect the metronidazole solution, so that the filter plate can be directly taken out when the barrel cover is removed, avoiding the need to separately take out the filter plate.

[0018] 2. When the barrel cover completely covers the barrel body, the filter plate cannot move downward anymore. At this time, the bottom of the filter plate just contacts the fixing seat and the bracket, so that the fixing plate and the bracket can effectively support the filter plate, avoiding the deformation of the filter screen during filtration and improving the use effect of the filter screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the present utility model;

[0020] Figure 2 is a schematic structural diagram of the feeding device in the present utility model;

[0021] Figure 3 This is a schematic structural diagram of the support device in the present utility model.

[0022] In the figure: 1, barrel body; 2, discharging valve; 3, barrel cover; 4, air inlet; 5, feeding device; 51, feeding pipe; 52, connecting block; 53, filter plate; 54, through hole; 6, support device; 61, fixed seat; 62, bracket. Specific embodiments

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0024] Please refer to Figures 1 - 3 , a pressure filter for the production of metronidazole, including a barrel body 1 for the pressure filter, a discharging valve 2 is provided at the bottom of the barrel body 1, a barrel cover 3 is provided on the barrel body 1, the barrel cover 3 and the barrel body 1 are connected by fixing parts (such as the cooperation of flange and bolt), an air inlet 4 is provided on the barrel cover 3, a feeding device 5 is provided on the barrel cover 3, the feeding device 5 is used to input the metronidazole solution into the barrel body 1, the feeding device 5 includes a feeding pipe 51 fixedly penetrating the barrel cover 3, a connecting block 52 is fixedly connected to the bottom of the feeding pipe 51, a filter plate 53 for filtering the nitrazole solution is fixedly connected to the bottom of the fixing block 52, a through hole 54 for discharging the nitrazole solution is provided on the feeding pipe 51 above the fixing block 52, the feeding pipe 51 penetrates the center of the barrel cover 3, a lifting lug is provided on the barrel cover 3 outside the feeding pipe 51, the connecting block 52 is of a cylindrical structure, the connecting block 52 is used to fix the filter plate 53 on the feeding pipe 51, the filter plate 53 is of a circular filter mesh structure, the diameter of the filter plate 53 is less than or equal to the inner diameter of the barrel body 1, a rubber layer is provided on the curved surface of the filter plate 53, and multiple groups of through holes 54 are provided and evenly distributed on the lower half of the feeding pipe 51.

[0025] Move the barrel cover 3 onto the barrel body 1. Through the feeding pipe 51 and the connecting block 52, the filter screen 53 is moved into the barrel body 1. The metronidazole solution is introduced into the interior of the barrel body 1 of the pressure filter through the feeding pipe 51. The metronidazole solution flows out from the through hole 54 of the feeding pipe 51 and falls onto the filter plate 53, changing the liquid discharge direction to avoid directly discharging and impacting the filter plate 53. At the same time, the interior of the barrel body 1 is pressurized through the air inlet 4, thereby performing pressure filtration on the metronidazole solution. The pressure-filtered metronidazole solution falls to the bottom inside the barrel body 1. Open the discharging valve 2 to collect the metronidazole solution, so that the filter plate 53 can be directly taken out when the barrel cover 3 is removed, avoiding the need to separately take out the filter plate 53.

[0026] A support device 6 is provided on the inner wall of the barrel body 1 below the filter plate 53. The support device 6 is used to support the filter plate 53. The support device 6 includes a fixed seat 61 provided on the inner wall of the barrel body 1. At the inner circle of the bottom of the fixed seat 61, there is a bracket 62 for supporting the filter plate 53. The fixed seat 61 is of an annular structure. The inner diameter of the inner circle of the fixed seat 61 is smaller than the diameter of the filter plate 53. The fixed seat 61 is in the lower half of the barrel body 1. The bracket 62 is composed of multiple groups of circular tubes fixedly connected. The bracket 62 is below the filter plate 53. The top end of the bracket 62 and the top end of the fixed seat 61 are on the same horizontal line.

[0027] When the barrel cover 3 is completely covered on the barrel body 1, the filter plate 53 cannot move downward any further. At this time, the bottom of the filter plate 53 just touches the fixed seat 61 and the bracket 62, so that the fixing plate 61 and the bracket 62 can effectively support the filter plate 53, avoiding the deformation of the filter screen 53 during pressure filtration and improving the use effect of the filter screen.

[0028] Working principle: In the present utility model, the movable barrel cover 3 is covered on the barrel body 1. Through the feed pipe 51 and the connecting block 52, the filter screen 53 is moved into the barrel body 1. The metronidazole solution enters the interior of the barrel body 1 of the filter press through the feed pipe 51. The metronidazole solution flows out from the through hole 54 through the feed pipe 51 and falls onto the filter plate 53, changing the liquid outlet direction to avoid directly discharging and impacting the filter plate 53. At the same time, the interior of the barrel body 1 is pressurized through the air inlet 4, so as to carry out pressure filtration on the metronidazole solution. The filtered metronidazole solution falls to the inner bottom of the barrel body 1. The discharge valve 2 is opened to collect the metronidazole solution, so that the filter plate 53 can be directly taken out when the barrel cover 3 is taken out, avoiding the need to separately take out the filter plate 53. When the barrel cover 3 is completely covered on the barrel body 1, the filter plate 53 cannot move downward any further. At this time, the bottom of the filter plate 53 just touches the fixed seat 61 and the bracket 62, so that the fixing plate 61 and the bracket 62 can effectively support the filter plate 53, avoiding the deformation of the filter screen 53 during pressure filtration and improving the use effect of the filter screen.

[0029] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0030] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A filter press for the production of metronidazole, comprising a barrel body (1) for the filter press, a discharge valve (2) is provided at the bottom of the barrel body (1), a barrel cover (3) provided on the barrel body (1), and an air inlet (4) is provided on the barrel cover (3), characterized in that: The bucket cover (3) is provided with a feeding device (5) for inputting the metronidazole solution into the bucket body (1). The feeding device (5) includes a feeding pipe (51) fixedly penetrating through the bucket cover (3). The bottom of the feeding pipe (51) is fixedly connected with a connecting block (52). The bottom of the connecting block (52) is fixedly connected with a filter plate (53) for filtering the nitrozole solution. A through hole (54) for discharging the nitrozole solution is provided on the feeding pipe (51) above the connecting block (52). A supporting device (6) is provided on the inner wall of the bucket body (1) below the filter plate (53).

2. The filter press for metronidazole production according to claim 1, characterized in that: The supporting device (6) is used to support the filter plate (53).

3. The pressure filter for metronidazole production according to claim 2, wherein: The supporting device (6) includes a fixed seat (61) provided on the inner wall of the bucket body (1). A bracket (62) for supporting the filter plate (53) is provided at the inner circle of the bottom of the fixed seat (61).

4. The pressure filter for metronidazole production according to claim 1, characterized in that: The feeding pipe (51) penetrates through the center of the bucket cover (3). The connecting block (52) has a cylindrical structure and is used to fix the filter plate (53) on the feeding pipe (51).

5. The filter press for metronidazole production according to claim 1, characterized in that: The filter plate (53) has a circular filter mesh structure. A rubber layer is provided on the curved surface of the filter plate (53). Multiple groups of through holes (54) are provided and evenly distributed in the lower half of the feeding pipe (51).

6. The filter press for metronidazole production according to claim 1, characterized in that: The diameter of the filter plate (53) is less than or equal to the inner diameter of the bucket body (1).

7. The pressure filter for metronidazole production according to claim 3, characterized in that: The fixed seat (61) has an annular structure. The inner diameter of the fixed seat (61) is less than the diameter of the filter plate (53). The fixed seat (61) is located in the lower half of the bucket body (1).

8. The filter press for metronidazole production according to claim 3, wherein: The bracket (62) is below the filter plate (53). The top of the bracket (62) is on the same horizontal line as the top of the fixed seat (61).

9. The pressure filter for metronidazole production according to claim 8, characterized in that: The bracket (62) is fixedly connected by multiple groups of round tubes.

10. The filter press for metronidazole production according to claim 1, characterized in that: The bucket cover (3) and the bucket body (1) are connected by fixing parts. A lifting lug is provided on the bucket cover (3) outside the feeding pipe (51).

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