Filter head for chromatographic column

Abstract

The utility model discloses a filter head for a chromatographic column, and belongs to the technical field of sample filtration. Comprising a shell, through holes are formed in the opposite sides of the shell in a penetrating mode, sliding grooves are formed in the opposite faces in the shell, sliding rods are slidably connected to the interiors of the sliding grooves, baffles are fixedly connected to the opposite faces of the sliding rods, the number of the baffles is three, every two adjacent baffles block the corresponding through hole, and mounting blocks are fixedly connected to the opposite sides of the baffles. According to the utility model, when the filter cone inside the shell is pushed out, the filter cone outside the shell is pushed into the shell, and at the moment, a sample can be continuously poured into the shell and filtered, so that the sample can be conveniently filtered, and the filter efficiency is greatly improved. When a sample is filtered, a worker can take the blocked filter screen out of the filter cone, so that the filter screen can be replaced more efficiently and conveniently, the downtime of the chromatograph is shortened, the sample filtering function can be recovered more quickly, and the sample filtering effect is improved.

Description

Technical Field

[0001] This utility model relates to a filter head for a chromatographic column, belonging to the field of sample filtration technology. Background Technology

[0002] A pre-filter head for liquid chromatography is a commonly used device in liquid chromatography analysis. Its function is to remove suspended solids, impurities, and high molecular weight substances before the sample enters the chromatographic column, so as to protect the chromatographic column from contamination or blockage.

[0003] Existing liquid chromatography column pre-filters mainly consist of a filter membrane and a filter element. When the filter membrane and filter element become clogged and need to be replaced, the chromatograph must be stopped, the filter head disassembled, and the filter element and filter membrane replaced and reassembled before filtration can continue. This affects the orderly filtration of samples. To address this, we propose a new filter head for chromatographic columns. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a filter head for a chromatography column, which solves the problem in the prior art that it takes a lot of time to replace filter membranes and filter elements, which affects the orderly progress of filtration.

[0005] The technical problem to be solved by this utility model is achieved by the following technical solution:

[0006] A filter head for a chromatography column includes a housing with through holes on opposite sides. The housing is characterized by: a sliding groove formed on opposite surfaces inside the housing; a sliding rod slidably connected inside the sliding groove; a baffle fixedly connected to the sliding rod; three baffles arranged along the extension direction of the sliding rod; two adjacent baffles sealing the through holes; a mounting block fixedly connected to opposite sides of the baffles; and a filter funnel fixedly connected to the mounting block between two adjacent baffles, with a filter screen installed inside the filter funnel.

[0007] By adopting the above technical solution, when the filter needs to be replaced, the operator can place the new filter inside the filter funnel outside the housing. Then, the operator only needs to push the side baffle, which pushes the slide rod to slide inside the groove, pushing out the filter funnel inside the housing and pushing the filter funnel outside the housing into the housing. At this time, the sample can continue to be poured in for filtration. The operator can then remove the clogged filter from inside the filter funnel. This allows for more efficient and convenient filter replacement, reduces chromatograph downtime, allows for faster restoration of sample filtration function, and improves sample filtration effect.

[0008] The present invention is further configured such that: a fixing ring is fixedly connected to the top of the filter screen, and a pressure sensor is installed at the top of the filter hopper, and the fixing ring can abut against the pressure sensor.

[0009] By adopting the above technical solution, the fixing ring can apply pressure to the pressure sensor without sample filtration. As debris accumulates inside the filter, the display reading will change. The staff can judge the amount of debris in the filter by the display reading, which will help remind the staff to replace the filter in time.

[0010] The present invention is further configured such that: a limiting block is fixedly connected to the two side baffles of the three baffles, and the limiting block can abut against the shell.

[0011] By adopting the above technical solution, the limiting block can play a blocking and limiting role. When the baffle is pushed to move, when the limiting block contacts the side of the shell, it means that the filter hopper has moved to the required position and the baffle has moved into the shell, which can seal and block the shell.

[0012] The present invention is further configured such that: a liquid outlet hopper aligned with the filter hopper is fixedly connected to the housing, and a drain hole is provided on the housing to connect the liquid outlet hopper with the housing.

[0013] By adopting the above technical solution, through the setting of the liquid outlet and the liquid drain hole, the sample inside the filter funnel will fall directly into the liquid outlet funnel through the liquid drain hole, and then enter the chromatographic column connected to the bottom of the liquid outlet funnel.

[0014] The present invention is further configured such that: a support rod is fixedly connected to the housing, and a mounting plate is fixedly connected to the end of the support rod away from the housing.

[0015] By adopting the above technical solution, the staff can install the mounting plate inside the chromatograph, thereby making the filter head more stable and improving its stability.

[0016] The present invention is further configured such that: an inlet pipe aligned with the filter funnel is fixedly installed on the housing, and the end of the inlet pipe extends into the interior of the housing.

[0017] By adopting the above technical solution, the sample can be more easily fed into the filter chamber through the liquid inlet tube.

[0018] The beneficial effects of this utility model are as follows: When the filter screen needs to be replaced, the operator can place the new filter screen inside the filter funnel outside the housing. Then, the operator only needs to push the side baffle, which can push the slide rod to slide inside the slide groove, pushing out the filter funnel inside the housing and pushing the filter funnel outside the housing into the housing. At this time, the sample can continue to be poured in for filtration. The operator can then remove the clogged filter screen from inside the filter funnel. This makes filter screen replacement more efficient and convenient, shortens the downtime of the chromatograph, allows for faster restoration of sample filtration function, and improves sample filtration effect. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the isometric structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the rear-view axonometric structure of this utility model;

[0021] Figure 3 This is a cross-sectional axonometric structural schematic diagram of the present invention;

[0022] Figure 4 This is a partially enlarged structural schematic diagram of the present invention;

[0023] Figure 5 This is an exploded view of the filter bucket in this utility model;

[0024] Figure 6 This utility model Figure 5 Enlarged structural diagram at point A in the middle;

[0025] Figure 7 This utility model Figure 1 Enlarged structural diagram at point B.

[0026] In the diagram: 1. Housing; 2. Slide groove; 3. Slide rod; 4. Baffle; 5. Mounting block; 6. Filter hopper; 7. Filter screen; 8. Fixing ring; 9. Pressure sensor; 10. Limiting block; 11. Liquid outlet hopper; 12. Drain hole; 13. Support rod; 14. Mounting plate; 15. Through hole; 16. Liquid inlet pipe. Detailed Implementation

[0027] To facilitate a clear understanding of the technical means, creative features, objectives, and effects of this utility model, the following description, in conjunction with specific illustrations, further elaborates on this utility model.

[0028] Example 1

[0029] like Figures 1 to 7As shown, a filter head for a chromatographic column includes a housing 1. Through holes 15 are provided on opposite sides of the housing 1. Sliding grooves 2 are formed on opposite surfaces inside the housing 1. Sliding rods 3 are slidably connected inside the sliding grooves 2. Baffles 4 are fixedly connected between the sliding rods 3 located within two sliding grooves 2. Three baffles 4 are arranged along the extension direction of the sliding rods 3. Two adjacent baffles 4 block the through holes 15. The moving direction of the baffles 4 is the same as the opening direction of the through holes 15. Two adjacent baffles 4 can block the through holes 15, keeping the interior of the housing 1 closed. Limiting blocks 10 are fixedly connected to the baffles 4 located on both sides of the three baffles 4. The limiting blocks 10 can abut against the housing 1 and limit the movement of the baffles 4 on both sides. Mounting blocks 5 are fixedly connected to opposite sides of the baffles 4. Filter funnels 6 are fixedly connected to the mounting blocks 5 between two adjacent baffles 4. When one filter funnel 6 moves into the interior of the housing 1, the other filter funnel 6 is outside the housing 1. A filter screen 7 is installed inside the filter funnel 6.

[0030] like Figure 5 and Figure 6 As shown, a retaining ring 8 is fixedly connected to the top of the filter screen 7, and a pressure sensor 9 is installed at the top of the filter hopper 6. The pressure sensor 9 converts the contact pressure of the retaining ring 8 into an electrical signal output. The pressure sensor 9 is electrically connected to the display on the external chromatograph via wires, allowing the user to directly observe the pressure value on the display. When the pressure sensor 9 is under pressure, it converts the pressure signal into an electrical signal and transmits it to the display via wires. The user can observe the pressure value of the pressure sensor 9 on the display, thereby determining the weight of the impurities filtered out of the filter hopper 6 and selecting the replacement time of the filter screen 7. When it is necessary to observe the condition of impurities inside the filter screen 7, the sample can be stopped from entering. The impurities retained inside the filter screen 7 will increase the overall weight of the filter screen 7. The change in the display reading allows the operator to intuitively judge the amount of impurities accumulated.

[0031] like Figure 3 As shown, an inlet pipe 16 aligned with the filter funnel 6 is fixedly installed on the housing 1, and the end of the inlet pipe 16 extends into the interior of the housing 1. The sample can be more easily fed into the filter funnel 6 through the inlet pipe 16. An outlet funnel 11 aligned with the filter funnel 6 is fixedly connected to the housing 1. A drain hole 12 is provided on the housing 1 to connect the outlet funnel 11 and the housing 1. The inlet conduit is connected to the inlet pipe 16. The chromatographic column is connected to the bottom end of the outlet funnel 11. The sample will be transported through the inlet conduit and flow into the filter funnel 6 inside the housing 1 through the inlet pipe 16. The filter screen 7 can filter impurities. The filtered sample in the filter funnel 6 can flow the sample liquid in the outlet funnel 11 into the chromatographic column, which is convenient for supplying the chromatographic column. The filtered sample will fall directly into the outlet funnel 11 through the drain hole 12, and then enter the chromatographic column connected to the bottom end of the outlet funnel 11.

[0032] like Figure 2 As shown, a support rod 13 is fixedly connected to the housing 1. A mounting plate 14 is fixedly connected to the end of the support rod 13 away from the housing 1. The mounting plate 14 has mounting holes. The operator can use bolts to install the mounting plate 14 inside the chromatograph to fix the filter head. The mounting plate 14 is fixedly connected to the end of the support rod 13 away from the housing 1. The operator can install the mounting plate 14 into the chromatograph, thereby making the filter head more stable and improving its stability.

[0033] When the filter 7 needs to be replaced, the operator can place the new filter 7 inside the filter funnel 6 outside the housing 1. Then, the operator only needs to push the side baffle 4, which will push the slide rod 3 to slide inside the slide groove 2, pushing out the filter funnel 6 inside the housing 1 and pushing the filter funnel 6 outside the housing 1 into the housing 1. At this time, the sample can continue to be poured in for filtration. The operator can then remove the clogged filter 7 from inside the filter funnel 6. This allows for more efficient and convenient replacement of the filter 7, shortens the downtime of the chromatograph, and allows for faster restoration of the sample filtration function, improving the sample filtration effect. Furthermore, the operator can visually determine that impurities have accumulated inside the filter 7 by observing the display readings. This makes it easier for the operator to detect and replace the filter 7 in a timely manner.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments, and various changes and modifications can be made without departing from the spirit and scope of this utility model. All such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A filter head for a chromatographic column, comprising a housing (1), wherein through holes (15) are provided on opposite sides of the housing (1), characterized in that: The shell (1) has a sliding groove (2) on the opposite side inside. A sliding rod (3) is slidably connected inside the sliding groove (2). A baffle (4) is fixedly connected to the sliding rod (3). Three baffles (4) are arranged along the extension direction of the sliding rod (3). Two adjacent baffles (4) block the through hole (15). An mounting block (5) is fixedly connected to the opposite side of the baffle (4). A filter bucket (6) is fixedly connected to the mounting block (5) between two adjacent baffles (4). A filter screen (7) is installed inside the filter bucket (6).

2. A filter head for a chromatographic column according to claim 1, characterized in that: The top of the filter screen (7) is fixedly connected to a fixing ring (8), and the top of the filter hopper (6) is equipped with a pressure sensor (9). The fixing ring (8) can abut against the pressure sensor (9).

3. A filter head for a chromatographic column according to claim 1, characterized in that: Limiting blocks (10) are fixedly connected to the two sides of the three baffles (4), and the limiting blocks (10) can abut against the housing (1).

4. A filter head for a chromatographic column according to claim 1, characterized in that: The housing (1) is fixedly connected to a liquid outlet hopper (11) aligned with the filter hopper (6), and the housing (1) is provided with a drain hole (12) that connects the liquid outlet hopper (11) to the housing (1).

5. A filter head for a chromatographic column according to claim 1, characterized in that: A support rod (13) is fixedly connected to the housing (1), and a mounting plate (14) is fixedly connected to the end of the support rod (13) away from the housing (1).

6. A filter head for a chromatographic column according to claim 1, characterized in that: An inlet pipe (16) aligned with the filter bucket (6) is fixedly installed on the housing (1), and the end of the inlet pipe (16) extends into the interior of the housing (1).

Images