Fluid distribution device of chromatographic column

Abstract

The utility model discloses a fluid distribution device of a chromatographic column, which comprises a piston body, a liquid inlet pipe is arranged in the piston body, a cylindrical groove is arranged at the bottom of the piston body, and a cylindrical shell and a circular filter plate are sequentially and fixedly arranged in the cylindrical groove from top to bottom. A plurality of liquid outlet pipes are mounted between the upper and lower inner walls of the inner cavity of the shell, upper and lower inlets and outlets of the liquid outlet pipes respectively penetrate through the upper and lower inner walls of the inner cavity of the shell, and a diversion trench is formed in the top of the shell and is provided with a plurality of branches respectively leading to top end liquid inlets of all the liquid outlet pipes; according to the fluid distribution device, the branch flow pipes are arranged beside the main flow pipe of the liquid inlet pipe and the liquid outlet pipe, part of fluid can be distributed to the branch flow pipes after the fluid enters the main flow pipe, the branch flow pipes are designed to be in an anticlockwise inclined J shape, and the fluid passing through the branch flow pipes can be guided to collide with the fluid in the main flow pipe in an inclined upward mode; and the flow velocity of the fluid is reduced while the two parts of fluid are converged.

Description

Technical Field

[0001] The utility model relates to the technical field of chromatographic columns, and specifically relates to a fluid distribution device for a chromatographic column. Background Art

[0002] Chromatography is an analytical technique for separating each component in a mixture. A chromatographic column is a part of the instrument used in chromatography. In order to ensure that the column bed of the chromatographic column meets the requirements of uniformity and stability, when the fluid flows through the column bed of the chromatographic column, it needs to be evenly distributed on the piston surface and then discharged evenly. Therefore, a fluid distribution device needs to be provided on the piston body. However, the existing fluid distribution device cannot control the flow rate of the discharged fluid. If the flow rate of the discharged fluid is too fast, it will wash away the packing in the chromatographic column, affecting the separation result of the chromatographic column.

[0003] Therefore, we design a fluid distribution device for a chromatographic column here. Content of the Utility Model

[0004] The purpose of the utility model is to provide a fluid distribution device for a chromatographic column in view of the deficiencies of the prior art, so as to solve the problems put forward in the background art.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A fluid distribution device for a chromatographic column, including a piston body. An inlet pipe is installed inside the piston body. A cylindrical groove is provided at the bottom of the piston body. And a cylindrical shell and a circular filter plate are fixedly installed in the cylindrical groove in sequence from top to bottom. A plurality of outlet pipes are installed between the upper and lower inner walls of the inner cavity of the shell. The upper and lower inlets and outlets of the outlet pipes respectively pass through the upper and lower inner walls of the inner cavity of the shell. A diversion groove is provided at the top of the shell. The diversion groove is provided with a plurality of branches respectively leading to the top inlet ports of all the outlet pipes;

[0006] The inlet pipe includes a first main pipe, a first branch pipe and a first guiding block. The first main pipe is located at the central axis position of the piston body and penetrates the piston body up and down. The bottom outlet of the first main pipe is located directly above the middle position of the main road of the diversion groove. The shape of the first branch pipe is a J shape inclined counterclockwise. Both the upper and lower ends of the first branch pipe are connected to the side wall of the first main pipe and communicate with the first main pipe. The first guiding block is fixed on the inner side wall of the first main pipe with the inclined surface facing up. The first guiding block is located opposite to the upper port of the first branch pipe.

[0007] Preferably, the structure of the liquid outlet pipe is the same as that of the liquid inlet pipe, including a second main pipe, a second branch pipe and a second guiding block. The second main pipe penetrates the housing vertically. The shape of the second branch pipe is a J shape inclined counterclockwise. Both the upper and lower ends of the second branch pipe are connected to the side wall of the second main pipe and communicate with the second main pipe. The second guiding block is fixed on the inner side wall of the second main pipe with the inclined surface facing upward, and the second guiding block is located opposite to the upper port of the second branch pipe.

[0008] Preferably, the piston body is made of stainless steel piston.

[0009] Preferably, the filter plate is made of stainless steel filter plate.

[0010] Compared with the prior art, the present utility model provides a fluid distribution device for a chromatographic column, having the following beneficial effects:

[0011] In the fluid distribution device of the chromatographic column, by arranging a branch pipe beside the main pipes of the liquid inlet pipe and the liquid outlet pipe, part of the fluid can be diverted to the branch pipe after the fluid enters the main pipe. By designing the shape of the branch pipe as a J shape inclined counterclockwise, the fluid passing through the branch pipe can be guided to collide obliquely upward with the fluid in the main pipe, so that the two parts of the fluid converge while reducing the flow rate of the fluid, thereby preventing the packing in the chromatographic column from being washed away due to too fast fluid flow rate. Description of the Drawings

[0012] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0013] Figure 2 is a schematic diagram of the top structure of the housing of the present utility model;

[0014] Figure 3 is a schematic diagram of the structure of the liquid outlet pipe of the present utility model.

[0015] Reference numerals: 1, piston body; 2, liquid inlet pipe; 2-1, first main pipe; 2-2, first branch pipe; 2-3, first guiding block; 3, housing; 4, diversion groove; 5, liquid outlet pipe; 5-1, second main pipe; 5-2, second branch pipe; 5-3, second guiding block; 6, filter plate. Detailed Embodiments

[0016] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the 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.

[0017] Please refer to Figures 1 - 3, in this implementation: A fluid distribution device for a chromatographic column includes a piston body 1. The piston body 1 is made of a stainless-steel piston. An inlet pipe 2 is installed inside the piston body 1. A cylindrical groove is provided at the bottom of the piston body 1, and a cylindrical housing 3 and a circular filter plate 6 are fixedly installed in the cylindrical groove in sequence from top to bottom. A plurality of outlet pipes 5 are installed between the upper and lower inner walls of the inner cavity of the housing 3. The upper and lower inlets and outlets of the outlet pipes 5 pass through the upper and lower inner walls of the inner cavity of the housing 3 respectively. A diversion groove 4 is provided at the top of the housing 3. The diversion groove 4 has several branches leading to the top inlet ports of all the outlet pipes 5. The top of the housing 3 is closely attached to the bottom of the piston body 1. The diversion groove 4 can be regarded as a diversion pipeline leading to each outlet pipe 5. When the fluid enters from the middle position of the main rod of the diversion groove 4, it can flow evenly to each outlet pipe 5 through the diversion groove 4. The filter plate 6 is made of a stainless-steel filter plate, and the filter plate 6 can re-disperse the fluid coming out of the outlet pipes 5;

[0018] The inlet pipe 2 includes a first main pipe 2-1, a first branch pipe 2-2 and a first guide block 2-3. The first main pipe 2-1 is located at the central axis position of the piston body 1 and penetrates the piston body 1 vertically. The bottom outlet of the first main pipe 2-1 is located directly above the middle position of the main road of the diversion groove 4. The shape of the first branch pipe 2-2 is a J shape inclined counterclockwise. Both the upper and lower ends of the first branch pipe 2-2 are connected to the side wall of the first main pipe 2-1 and communicate with the first main pipe 2-1. The first guide block 2-3 is fixed on the inner side wall of the first main pipe 2-1 with the inclined surface facing upward. The first guide block 2-3 is located opposite to the upper port of the first branch pipe 2-2. After the fluid enters the first main pipe 2-1, under the guidance of the first guide block 2-3, part of the fluid will enter the first main pipe 2-1, and the other part of the fluid will enter the first branch pipe 2-2. The fluid entering the first branch pipe 2-2 will eventually collide with the fluid in the first main pipe 2-1 obliquely upward under the guidance of the first branch pipe 2-2. When the two parts of the fluid converge, the flow rate of the fluid will decrease, and finally it will flow into the diversion groove 4.

[0019] Please refer to Figure 3 , the structure of the outlet pipe 5 is the same as that of the inlet pipe 2, including a second main pipe 5-1, a second branch pipe 5-2 and a second guide block 5-3. The second main pipe 5-1 penetrates the housing 3 vertically. The shape of the second branch pipe 5-2 is a J shape inclined counterclockwise. Both the upper and lower ends of the second branch pipe 5-2 are connected to the side wall of the second main pipe 5-1 and communicate with the second main pipe 5-1. The second guide block 5-3 is fixed on the inner side wall of the second main pipe 5-1 with the inclined surface facing upward. The second guide block 5-3 is located opposite to the upper port of the second branch pipe 5-2. The principle of the outlet pipe 5 is the same as that of the inlet pipe 2. The flow rate of the fluid coming out of the outlet pipe 5 will be reduced again, so as to prevent the fluid flow rate from being too fast and flushing away the packing in the chromatographic column.

[0020] Working principle and usage process of the present utility model: When the fluid distribution device of this chromatographic column is in use, the fluid is pumped into the inlet pipe 2 by a liquid delivery pump. After the fluid reduces its flow rate through the inlet pipe 2, it enters the diversion groove 4, and then is evenly distributed to each outlet pipe 5 through the diversion groove 4. After the fluid passes through the outlet pipe 5, its flow rate is reduced again and it evenly enters the filter plate 6. The fluid is dispersed again through the filter plate 6 and finally enters the column bed.

[0021] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A fluid distribution device for a chromatographic column, comprising a piston body (1), characterized in that: An inlet pipe (2) is installed inside the piston body (1). A cylindrical groove is provided at the bottom of the piston body (1). A cylindrical housing (3) and a circular filter plate (6) are fixedly installed in the cylindrical groove in sequence from top to bottom. A plurality of liquid outlet pipes (5) are installed between the upper and lower inner walls of the inner cavity of the housing (3). The upper and lower inlets and outlets of the liquid outlet pipe (5) pass through the upper and lower inner walls of the inner cavity of the housing (3) respectively. A diversion groove (4) is provided at the top of the housing (3). The diversion groove (4) is provided with a plurality of branches leading to the top liquid inlet of all the liquid outlet pipes (5). The inlet pipe (2) includes a first main pipe (2-1), a first branch pipe (2-2) and a first guiding block (2-3). The first main pipe (2-1) is located at the central axis position of the piston body (1) and penetrates through the piston body (1) vertically. The bottom outlet of the first main pipe (2-1) is located directly above the middle position of the main road of the diversion groove (4). The shape of the first branch pipe (2-2) is a J shape inclined counterclockwise. The upper and lower ends of the first branch pipe (2-2) are both connected to the side wall of the first main pipe (2-1) and communicate with the first main pipe (2-1). The first guiding block (2-3) is fixed on the inner side wall of the first main pipe (2-1) with the inclined surface facing upward. The first guiding block (2-3) is located opposite to the upper port of the first branch pipe (2-2).

2. The fluid distribution device of a chromatographic column according to claim 1, characterized in that: The structure of the liquid outlet pipe (5) is the same as that of the inlet pipe (2), including a second main pipe (5-1), a second branch pipe (5-2) and a second guiding block (5-3). The second main pipe (5-1) penetrates through the housing (3) vertically. The shape of the second branch pipe (5-2) is a J shape inclined counterclockwise. The upper and lower ends of the second branch pipe (5-2) are both connected to the side wall of the second main pipe (5-1) and communicate with the second main pipe (5-1). The second guiding block (5-3) is fixed on the inner side wall of the second main pipe (5-1) with the inclined surface facing upward. The second guiding block (5-3) is located opposite to the upper port of the second branch pipe (5-2).

3. The fluid distribution device of a chromatographic column according to claim 1, characterized in that: The piston body (1) is made of stainless steel piston.

4. The fluid distribution device of a chromatographic column according to claim 1, characterized in that: The filter plate (6) is made of stainless steel filter plate.

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