Chromatographic column back flushing device

Abstract

The utility model discloses a chromatographic column back flushing device, the chromatographic column is provided with a first end and a second end, the chromatographic column back flushing device comprises a liquid supply end and a liquid outlet end, the liquid supply end and the liquid outlet end are both communicated with an external water path, and the chromatographic column is arranged between the liquid supply end and the liquid outlet end; the control assembly has a first state and a second state, the control assembly is in the first state so that the liquid supply end can be communicated with the first end, the liquid outlet end can be communicated with the second end, the control assembly is in the second state so that the liquid supply end can be communicated with the second end, and the liquid outlet end can be communicated with the first end. According to the reverse flushing device for the chromatographic column, disclosed by the utility model, the control assembly capable of switching states is arranged, so that when liquid reversely flows in the chromatographic column, blockages or impurities accumulated in the filler can be flushed away, and the impurities can be cleaned under the condition that the device is not required to be disassembled, the column efficiency of the chromatographic column is ensured, and the service life of the chromatographic column is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of chromatographic analysis, especially to a chromatographic column reverse flushing device. BACKGROUND

[0002] The related art points out that after the chromatographic column is sampled for many times, impurities are adsorbed on the sampling side of the chromatographic column filler, causing the chromatographic column to be blocked, the column efficiency of the chromatographic column to be reduced, and the service life to be seriously shortened, and part of the pipeline is prone to be blocked for a long time and is inconvenient to disassemble. SUMMARY

[0003] The utility model discloses at least solve one of the prior art technical problems. Therefore, the utility model provides a chromatographic column reverse flushing device, the chromatographic column reverse flushing device can clean the impurities on the chromatographic column without disassembling.

[0004] According to the chromatographic column reverse flushing device of the utility model, the chromatographic column has a first end and a second end, the chromatographic column reverse flushing device includes: a liquid supply end and a liquid outlet end, the liquid supply end and the liquid outlet end are communicated with the external waterway, and the chromatographic column is arranged between the liquid supply end and the liquid outlet end; a control assembly, the control assembly has a first state and a second state, the control assembly is in the first state to make the liquid supply end communicate with the first end, and the liquid outlet end communicates with the second end, and the control assembly is in the second state to make the liquid supply end communicate with the second end, and the liquid outlet end communicates with the first end.

[0005] According to the chromatographic column reverse flushing device of the utility model, by setting the control assembly with switchable states, when the liquid flows reversely in the chromatographic column, the blockage or the impurities accumulated in the filler can be washed away, the impurities can be cleaned without disassembling, the column efficiency of the chromatographic column is ensured, and the service life of the chromatographic column is prolonged.

[0006] In some embodiments, the control assembly includes a first control valve, the first control valve has a first valve passage and a second valve passage, and the chromatographic column reverse flushing device further includes: a first pipeline, a second pipeline and a third pipeline, the liquid supply end is formed in the first pipeline, one end of the first valve passage communicates with the first pipeline, the other end of the first valve passage can communicate with one of the first end of the chromatographic column and the second pipeline, one end of the second valve passage communicates with the third pipeline, and the other end of the second valve passage can communicate with one of the first end of the chromatographic column and the second pipeline.

[0007] In some embodiments, when the control assembly is in the first state, the first valve passage is in communication with the first line and the first end of the chromatographic column, and the second valve passage is in communication with the second line and the third line; when the control assembly is in the second state, the first valve passage is in communication with the first line and the second line, and the second valve passage is in communication with the third line.

[0008] In some embodiments, the first control valve comprises a first fixed seat and a first rotating seat, the first rotating seat is rotatably connected with the first fixed seat, the first valve passage and the second valve passage are formed in the first rotating seat, the first fixed seat is sequentially formed with a first joint, a second joint, a third joint and a fourth joint in the circumferential direction, the first joint, the second joint, the third joint and the fourth joint are uniformly spaced, the first joint is connected with the first line, the second joint is connected with the first end of the chromatographic column, the third joint is connected with the third line, and the fourth joint is connected with the second line.

[0009] In some embodiments, any two adjacent ones of the first joint, the second joint, the third joint and the fourth joint are in communication with the first valve passage, and the other two of the first joint, the second joint, the third joint and the fourth joint are in communication with the second valve passage.

[0010] In some embodiments, the control assembly further comprises a second control valve having a third valve passage and a fourth valve passage, and the chromatographic column backflushing device further comprises a fourth line, the liquid outlet is formed in the fourth line, the third valve passage is in communication with the second line and the second end of the chromatographic column, and the fourth valve passage is in communication with the third line and the fourth line.

[0011] In some embodiments, the second control valve is sequentially formed with a fifth joint, a sixth joint, a seventh joint and an eighth joint in the circumferential direction, the fifth joint, the sixth joint, the seventh joint and the eighth joint are uniformly spaced, the fifth joint is connected with the second line, the sixth joint is connected with the fourth line, the seventh joint is connected with the third line, and the eighth joint is connected with the second end of the chromatographic column, the third valve passage is connected between the fifth joint and the eighth joint, and the fourth valve passage is connected between the sixth joint and the seventh joint.

[0012] In some embodiments, the control assembly further comprises a second control valve having a third valve passage and a fourth valve passage, and the column backflushing device further comprises a fourth pipe, the outlet port being formed in the fourth pipe, one end of the third valve passage being in communication with the second end of the column, the other end of the third valve passage being in communication with one of the fourth pipe and the second pipe, one end of the fourth valve passage being in communication with the third pipe, and the other end of the fourth valve passage being in communication with the other one of the fourth pipe and the second pipe.

[0013] In some embodiments, the second control valve comprises a second fixed seat and a second rotating seat, the second rotating seat being rotatably connected with the second fixed seat, the third valve passage and the fourth valve passage being formed in the second rotating seat, the second fixed seat sequentially having a fifth joint, a sixth joint, a seventh joint and an eighth joint formed thereon in a circumferential direction, the fifth joint, the sixth joint, the seventh joint and the eighth joint being uniformly spaced apart, the fifth joint being connected with the second pipe, the sixth joint being connected with the third pipe, the seventh joint being connected with the fourth pipe, and the eighth joint being connected with the second end of the column.

[0014] In some embodiments, the third valve passage is in communication with any two adjacent ones of the fifth joint, the sixth joint, the seventh joint and the eighth joint, and the fourth valve passage is in communication with the other two of the fifth joint, the sixth joint, the seventh joint and the eighth joint.

[0015] Additional aspects and advantages of the present application will be given in part in the following description, become apparent from the following description, or be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a schematic view of a column backflushing device according to an embodiment of the present application, wherein a control assembly is in a first state;

[0017] Figure 2 is Figure 1 a schematic view of the column backflushing device shown in FIG.

[0018] Figure 3 is a schematic view of a column backflushing device according to another embodiment of the present application, wherein a control assembly is in a first state;

[0019] Figure 4 is Figure 3 a schematic view of the column backflushing device shown in FIG.

[0020] Figure 5 is a schematic view of a chromatographic column backflushing device according to a further embodiment of the present application, wherein the control assembly is in the first state;

[0021] Figure 6 is Figure 5 a schematic view of a chromatographic column backflushing device shown in Fig. 1, wherein the control assembly is in the second state;

[0022] Figure 7 is a schematic view of a first control valve according to an embodiment of the present application.

[0023] Reference signs:

[0024] 100, chromatographic column backflushing device; 1, liquid supply end; 2, liquid outlet end; 3, first control valve; 31, first rotating seat; 311, first valve passage; 312, second valve passage; 32, first fixed seat; 321, first connector; 322, second connector; 323, third connector; 324, fourth connector; 4, second control valve; 41, second rotating seat; 411, third valve passage; 412, fourth valve passage; 42, second fixed seat; 421, fifth connector; 422, sixth connector; 423, seventh connector; 424, eighth connector; 5, first pipeline; 6, second pipeline; 7, third pipeline; 8, fourth pipeline; 9, chromatographic column; 91, first end; 92, second end. DETAILED DESCRIPTION

[0025] Embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0026] Reference will be made to Figures 1-7 a chromatographic column backflushing device 100 according to an embodiment of the present application.

[0027] As shown in Fig. 1, the chromatographic column backflushing device 100 according to an embodiment of the present application comprises a liquid supply end 1, a liquid outlet end 2 and a control assembly. Figures 1-7

[0028] Specifically, the liquid supply end 1 and the liquid outlet end 2 are both in communication with an external water line, the chromatographic column 9 is arranged between the liquid supply end 1 and the liquid outlet end 2, the chromatographic column 9 has a first end 91 and a second end 92, the control assembly has a first state and a second state, the control assembly is in the first state to make the liquid supply end 1 communicate with the first end 91 and the liquid outlet end 2 communicate with the second end 92, and the control assembly is in the second state to make the liquid supply end 1 communicate with the second end 92 and the liquid outlet end 2 communicate with the first end 91. ​

[0029] It can be understood that the control assembly is used to switch the flow direction of the liquid in the chromatographic column 9. When the control assembly is in the first state, the normal flow direction is maintained, that is, the liquid supply end 1 is connected to the first end 91 of the chromatographic column 9, and the liquid outlet end 2 is connected to the second end 92. When the control assembly is in the second state, the flow direction is reversed, that is, the liquid supply end 1 is connected to the second end 92 of the chromatographic column 9, and the liquid outlet end 2 is connected to the first end 91. That is, when reverse flushing needs to be performed, the flow direction of the liquid in the chromatographic column 9 is changed by adjusting the state of the control assembly. At this time, the liquid will be injected from the liquid outlet end 2, enter through the second end 92 of the chromatographic column 9, and finally flow out from the first end 91 back to the liquid supply end 1. Such reverse flow helps to loosen and flush away the blockage or impurities accumulated in the packing.

[0030] According to the chromatographic column reverse flushing device 100 of the embodiment of the present application, by setting the control assembly with switchable states, when the liquid flows in the reverse direction in the chromatographic column 9, the blockage or impurities accumulated in the packing can be flushed away, the impurities can be cleaned without disassembly, the column efficiency of the chromatographic column 9 is ensured, and the service life of the chromatographic column 9 is prolonged.

[0031] In an embodiment of the present application, the control assembly includes a first control valve 3, the first control valve 3 has a first valve passage 311 and a second valve passage 312, and the chromatographic column reverse flushing device 100 further includes a first pipeline 5, a second pipeline 6 and a third pipeline 7. The liquid supply end 1 is formed in the first pipeline 5, one end of the first valve passage 311 is in communication with the first pipeline 5, the other end of the first valve passage 311 is in communication with one of the first end 91 of the chromatographic column 9 and the second pipeline 6, one end of the second valve passage 312 is in communication with the third pipeline 7, and the other end of the second valve passage 312 is in communication with one of the first end 91 of the chromatographic column 9 and the second pipeline 6.

[0032] Specifically, when the control assembly is in the first state, the first valve passage 311 is in communication with the first pipeline 5 and the first end 91 of the chromatographic column 9, and the second valve passage 312 is in communication with the second pipeline 6 and the third pipeline 7. When the control assembly is in the second state, the first valve passage 311 is in communication with the first pipeline 5 and the second pipeline 6, and the second valve passage 312 is in communication with the third pipeline 7.

[0033] As Figure 3 and Figure 4As shown, the first control valve 3 comprises a first fixed seat 32 and a first rotating seat 31, the first rotating seat 31 is rotatably connected with the first fixed seat 32, a first valve passage 311 and a second valve passage 312 are formed in the first rotating seat 31, a first joint 321, a second joint 322, a third joint 323 and a fourth joint 324 are sequentially formed in the circumferential direction of the first fixed seat 32, the first joint 321, the second joint 322, the third joint 323 and the fourth joint 324 are uniformly and spacedly arranged, the first joint 321 is connected with the first pipeline 5, the second joint 322 is connected with the first end 91 of the chromatographic column 9, the third joint 323 is connected with the third pipeline 7, and the fourth joint 324 is connected with the second pipeline 6.

[0034] Specifically, the first valve passage 311 can be communicated with any two adjacent ones of the first joint 321, the second joint 322, the third joint 323 and the fourth joint 324, and the second valve passage 312 can be communicated with the other two of the first joint 321, the second joint 322, the third joint 323 and the fourth joint 324.

[0035] Further, the control assembly further comprises a second control valve 4, the second control valve 4 has a third valve passage 411 and a fourth valve passage 412, and the chromatographic column reverse flushing device 100 further comprises a fourth pipeline 8, the liquid outlet end 2 is formed in the fourth pipeline 8, the third valve passage 411 is communicated with the second pipeline 6 and the second end 92 of the chromatographic column 9, and the fourth valve passage 412 is communicated with the third pipeline 7 and the fourth pipeline 8.

[0036] Specifically, the second control valve 4 has a fifth joint 421, a sixth joint 422, a seventh joint 423 and an eighth joint 424 sequentially formed in the circumferential direction, the fifth joint 421, the sixth joint 422, the seventh joint 423 and the eighth joint 424 are uniformly and spacedly arranged, the fifth joint 421 is connected with the second pipeline 6, the sixth joint 422 is connected with the fourth pipeline 8, the seventh joint 423 is connected with the third pipeline 7, and the eighth joint 424 is connected with the second end 92 of the chromatographic column 9, the third valve passage 411 is connected between the fifth joint 421 and the eighth joint 424, and the fourth valve passage 412 is connected between the sixth joint 422 and the seventh joint 423.

[0037] In another embodiment of the utility model, the control assembly further comprises a second control valve 4, the second control valve 4 has a third valve passage 411 and a fourth valve passage 412, and the chromatographic column reverse flushing device 100 further comprises a fourth pipeline 8, the liquid outlet end 2 is formed in the fourth pipeline 8, one end of the third valve passage 411 is communicated with the second end 92 of the chromatographic column 9, the other end of the third valve passage 411 is communicated with one of the fourth pipeline 8 and the second pipeline 6, one end of the fourth valve passage 412 is communicated with the third pipeline 7, and the other end of the fourth valve passage 412 is communicated with one of the fourth pipeline 8 and the second pipeline 6.

[0038] Specifically, the second control valve 4 comprises a second fixed seat 42 and a second rotating seat 41, the second rotating seat 41 is rotatably connected with the second fixed seat 42, a third valve passage 411 and a fourth valve passage 412 are formed in the second rotating seat 41, a fifth joint 421, a sixth joint 422, a seventh joint 423 and an eighth joint 424 are sequentially formed in the circumferential direction of the second fixed seat 42, the fifth joint 421, the sixth joint 422, the seventh joint 423 and the eighth joint 424 are uniformly spaced, the fifth joint 421 is connected with the second pipeline 6, the sixth joint 422 is connected with the third pipeline 7, the seventh joint 423 is connected with the fourth pipeline 8, and the eighth joint 424 is connected with the second end 92 of the chromatographic column 9.

[0039] As shown in Figure 1 and Figure 2 , the third valve passage 411 can be communicated with any two adjacent ones of the fifth joint 421, the sixth joint 422, the seventh joint 423 and the eighth joint 424, and the fourth valve passage 412 can be communicated with the other two of the fifth joint 421, the sixth joint 422, the seventh joint 423 and the eighth joint 424.

[0040] Preferably, in order to facilitate assembly, the peripheral walls of the first joint 321, the second joint 322, the third joint 323, the fourth joint 324, the fifth joint 421, the sixth joint 422, the seventh joint 423 and the eighth joint 424 are all formed with threads.

[0041] The chromatographic column backflushing device 100 according to three specific embodiments of the present application will be described below with reference to Figures 1-7 .

[0042] In embodiment one, the first control valve 3 is a four-way reversing valve, and the second control valve 4 is a normally open valve.

[0043] With reference to Figure 3 , the control assembly is in the first state, keeping the normal flow direction, at this time, the first valve passage 311 is communicated with the first pipeline 5 and the first end 91 of the chromatographic column 9, and the second valve passage 312 is communicated with the second pipeline 6 and the third pipeline 7. In this way, the liquid flows from the liquid supply end 1 through the first pipeline 5, the first joint 321 into the first valve passage 311, and then through the second joint 322 into the first end 91 of the chromatographic column 9, and then flows into the chromatographic column 9, and then flows from the second end 92 of the chromatographic column 9 through the eighth joint 424 into the third valve passage 411, and then flows into the second pipeline 6 through the fifth joint 421, and then flows into the second valve passage 312 through the fourth joint 324, and then flows into the third pipeline 7 from the third joint 323, and then flows into the fourth valve passage 412 through the seventh joint 423, and then flows out from the liquid discharge end 2 through the sixth joint 422.

[0044] With reference to Figure 4 , the control assembly is in the second state, for the flow direction of back flushing, at this time, the first valve passage 311 is in communication with the first pipe 5 and the second pipe 6, and the second valve passage 312 is in communication with the first end 91 of the chromatographic column 9 and the third pipe 7. In this way, the liquid flows from the liquid supply end 1 through the first pipe 5, the first joint 321 into the first valve passage 311, and through the fourth joint 324 into the second pipe 6, from the second pipe 6 through the fifth joint 421 into the third valve passage 411, from the eighth joint 424 through the second end 92 of the chromatographic column 9 into the chromatographic column 9, from the first end 91 of the chromatographic column 9 through the second joint 322 into the second valve passage 312, and then through the third joint 323, the third pipe 7, the seventh joint 423 into the fourth valve passage 412, and further from the sixth joint 422 out of the liquid discharge end 2.

[0045] In the second embodiment, the first control valve 3 and the second control valve 4 are both four-way reversing valves.

[0046] With reference to Figure 1 , the control assembly is in the first state, keeping the normal flow direction, at this time, the first valve passage 311 is in communication with the first pipe 5 and the first end 91 of the chromatographic column 9, and the second valve passage 312 is in communication with the second pipe 6 and the third pipe 7. In this way, the liquid flows from the liquid supply end 1 through the first pipe 5, the first joint 321 into the first valve passage 311, and through the second joint 322 through the first end 91 of the chromatographic column 9 into the chromatographic column 9, from the second end 92 of the chromatographic column 9 through the eighth joint 424 into the third valve passage 411, through the third valve passage 411 through the seventh joint 423 into the fourth pipe 8, and finally through the fourth pipe 8 out of the liquid discharge end 2. The second pipe 6, the fourth valve passage 412, the third pipe 7 and the second valve passage 312 are sequentially connected end to end, and the second pipe 6, the fourth valve passage 412, the third pipe 7 and the second valve passage 312 are not connected to the liquid supply end 1 and have no liquid flow.

[0047] With reference to Figure 2The control assembly is in the second state, indicating a reverse flushing flow direction. At this time, the first valve passage 311 is connected to the first pipeline 5 and the second pipeline 6, the second valve passage 312 is connected to the first end 91 of the chromatographic column 9 and the third pipeline 7, the third valve passage 411 is connected to the second pipeline 6 and the second end 92 of the chromatographic column 9, and the fourth valve passage 412 is connected to the third pipeline 7 and the fourth pipeline 8. Thus, liquid flows from the liquid supply end 1 through the first connector 321 into the first valve passage 311, and then flows into the second pipeline 6 through the fourth connector 324. It then flows from the second pipeline 6 through the fifth connector 421 into the third valve passage 411, flows from the eighth connector 424 through the second end 92 of the chromatographic column 9 into the chromatographic column 9, and then flows from the first end 91 of the chromatographic column 9 through the second connector 322 into the second valve passage 312. It then flows through the third connector 323, the third pipeline 7, and the sixth connector 422 into the fourth valve passage 412, and then flows through the seventh connector 423 into the fourth pipeline 8. Finally, the liquid flows out of the liquid outlet end 2 through the fourth pipeline 8.

[0048] In the third embodiment, the first control valve 3 is a four-way reversing valve.

[0049] Reference Figure 5 As shown, the control assembly is in the first state, maintaining a normal flow direction. At this time, the first valve passage 311 is connected to the first pipeline 5 and the first end 91 of the chromatographic column 9, and the second valve passage 312 is connected to the second pipeline 6 and the third pipeline 7. In this way, liquid flows from the liquid supply end 1 through the first connector 321 into the first valve passage 311, and then through the second connector 322, through the first end 91 of the chromatographic column 9, into the chromatographic column 9, and then from the second end 92 of the chromatographic column 9 into the second pipeline 6. Then, through the fourth connector 324, it enters the second valve passage 312, and flows from the third connector 323 into the third pipeline 7, and finally flows out from the liquid outlet end 2.

[0050] Reference Figure 6 The control assembly is in the second state, indicating a reverse flushing flow direction. At this point, the first valve passage 311 is connected to the first pipeline 5 and the second pipeline 6, while the second valve passage 312 is connected to the first end 91 of the chromatographic column 9 and the third pipeline 7. Thus, liquid flows from the liquid supply end 1 through the first connector 321 into the first valve passage 311, flows through the fourth connector 324 into the second pipeline 6, flows from the second pipeline 6 through the second end 92 of the chromatographic column 9 into the chromatographic column 9, flows from the first end 91 of the chromatographic column 9 through the second connector 322 into the second valve passage 312, and then flows sequentially through the third connector 323 and the third pipeline 7 to exit the liquid outlet end 2.

[0051] In the description of the utility model, it is necessary to understand that the orientation or positional relation indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" is the orientation or positional relation based on the orientation or positional relation shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0052] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "multiple" is two or more than two, unless otherwise explicitly specified and limited.

[0053] In the utility model, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected, or it can be communicated; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0054] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of different embodiments or examples without contradiction.

[0055] Although the embodiments of the utility model have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the utility model, and the scope of the utility model is defined by the claims and their equivalents.

Claims

1. A chromatographic column backwashing device, characterized in that: The chromatographic column has a first end and a second end, and the chromatographic column backwashing device comprises: A liquid supply end and a liquid outlet end, both of which are connected to an external water channel, and the chromatographic column is arranged between the liquid supply end and the liquid outlet end; A control component having a first state and a second state. When the control component is in the first state, the liquid supply end is connected to the first end and the liquid outlet end is connected to the second end. When the control component is in the second state, the liquid supply end is connected to the second end and the liquid outlet end is connected to the first end.

2. The chromatographic column backwashing device according to claim 1, characterized in that: The control component includes a first control valve, which has a first valve passage and a second valve passage. The chromatographic column back flushing device also includes: a first pipeline, a second pipeline and a third pipeline. The liquid supply end is formed in the first pipeline. One end of the first valve passage is connected to the first pipeline, and the other end of the first valve passage can be connected to the first end of the chromatographic column and one of the second pipeline. One end of the second valve passage is connected to the third pipeline, and the other end of the second valve passage can be connected to the first end of the chromatographic column and one of the second pipeline.

3. The chromatographic column backwashing device according to claim 2, characterized in that: When the control component is in a first state, the first valve passage is connected to the first pipeline and the first end of the chromatographic column, and the second valve passage is connected to the second pipeline and the third pipeline; when the control component is in a second state, the first valve passage is connected to the first pipeline and the second pipeline, and the second valve passage is connected to the third pipeline.

4. The chromatographic column backwashing device according to claim 3, characterized in that: The first control valve includes: a first fixed seat and a first rotating seat, the first rotating seat is rotatably connected to the first fixed seat, the first valve passage and the second valve passage are formed in the first rotating seat, and a first joint, a second joint, a third joint and a fourth joint are sequentially formed on the circumference of the first fixed seat, the first joint, the second joint, the third joint and the fourth joint are evenly spaced, the first joint is connected to the first pipeline, the second joint is connected to the first end of the chromatographic column, the third joint is connected to the third pipeline, and the fourth joint is connected to the second pipeline.

5. The chromatographic column backwashing device according to claim 4, characterized in that: The first valve passage is communicable with any two adjacent ones of the first connector, the second connector, the third connector and the fourth connector, and the second valve passage is communicable with the other two of the first connector, the second connector, the third connector and the fourth connector.

6. The chromatographic column backwashing device according to claim 5, characterized in that: The control component also includes: a second control valve, the second control valve has a third valve passage and a fourth valve passage, the chromatographic column back flushing device also includes: a fourth pipeline, the liquid outlet end is formed in the fourth pipeline, the third valve passage connects the second pipeline and the second end of the chromatographic column, and the fourth valve passage connects the third pipeline and the fourth pipeline.

7. The chromatographic column backwashing device according to claim 6, characterized in that: A fifth joint, a sixth joint, a seventh joint and an eighth joint are formed in sequence on the circumference of the second control valve, and the fifth joint, the sixth joint, the seventh joint and the eighth joint are arranged evenly spaced apart. The fifth joint is connected to the second pipeline, the sixth joint is connected to the fourth pipeline, the seventh joint is connected to the third pipeline, and the eighth joint is connected to the second end of the chromatographic column. The third valve passage is connected between the fifth joint and the eighth joint, and the fourth valve passage is connected between the sixth joint and the seventh joint.

8. The chromatographic column backwashing device according to claim 5, characterized in that: The control component also includes: a second control valve, the second control valve has a third valve passage and a fourth valve passage, the chromatographic column back flushing device also includes: a fourth pipeline, the liquid outlet end is formed in the fourth pipeline, one end of the third valve passage is connected to the second end of the chromatographic column, the other end of the third valve passage is connected to the fourth pipeline and one of the second pipeline, one end of the fourth valve passage is connected to the third pipeline, and the other end of the fourth valve passage is connected to the fourth pipeline and one of the second pipeline.

9. The chromatographic column backwashing device according to claim 8, characterized in that: The second control valve includes: a second fixed seat and a second rotating seat, the second rotating seat is rotatably connected to the second fixed seat, the third valve passage and the fourth valve passage are formed in the second rotating seat, and a fifth joint, a sixth joint, a seventh joint and an eighth joint are sequentially formed on the circumference of the second fixed seat, the fifth joint, the sixth joint, the seventh joint and the eighth joint are evenly spaced, the fifth joint is connected to the second pipeline, the sixth joint is connected to the third pipeline, the seventh joint is connected to the fourth pipeline, and the eighth joint is connected to the second end of the chromatographic column.

10. The chromatographic column backwashing device according to claim 9, characterized in that: The third valve passage is communicable with any two adjacent ones of the fifth joint, the sixth joint, the seventh joint and the eighth joint, and the fourth valve passage is communicable with the other two of the fifth joint, the sixth joint, the seventh joint and the eighth joint.

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