Solvent inlet filter for chromatograph

Abstract

The utility model relates to a solvent inlet filter for a chromatographic instrument, which comprises a filter element, and a chromatographic instrument hose connecting structure is arranged at the top of the filter element; the chromatograph hose connecting structure comprises a connecting sleeve, a connecting seat, a connecting pipe, a pipeline connecting box, a shunting head, a shunting pipe, a threaded connector, a chromatograph hose connector, a sliding rod, a spring, a protective cover, a cover plate, a threaded ring and a through hole. According to the solvent inlet filter for the chromatographic instrument, five threaded connectors are arranged, different chromatographic instrument hose connectors can be mounted on each threaded connector, specifically, four chromatographic instrument hose connectors are annularly arranged at the top of a pipeline connecting box, and the four chromatographic instrument hose connectors can be mounted on the pipeline connecting box; and the other chromatograph hose connector is positioned in the center of the top of the pipeline connecting box, so that the filter can freely adjust the connected hoses with different pipe diameters according to experimental requirements, and the flexibility is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of chromatography technology, specifically to a solvent inlet filter for a chromatography instrument. Background Technology

[0002] A chromatograph is an instrument used to separate and analyze the components in a mixture. To ensure that the mobile phase entering the chromatographic column is pure and free of impurities, a solvent inlet filter is usually used before the mobile phase enters the system.

[0003] A search revealed a utility model patent (CN216986559U) disclosing a universal solvent inlet filter for a chromatograph. The filter includes a sleeve with a first-stage connector at the middle of its upper end, a second-stage connector at the upper end of the first-stage connector, and a third-stage connector at the upper end of the second-stage connector. The upper end of the sleeve has symmetrically arranged semi-circular shells on both sides of the first-stage connector. This utility model allows connection to liquid phase mobile phase hoses of different diameters via the first-stage, second-stage, and third-stage connectors. After the liquid phase mobile phase hose is fitted over the first-stage, second-stage, or third-stage connector, the semi-circular shells on both sides are joined together, and the fastening adjustment mechanisms on both sides and the end fastening adjustment mechanism are rotated 90 degrees clockwise. This securely fixes the hose to the outside of the first-stage, second-stage, or third-stage connector, preventing the hose from detaching from the filter and thus avoiding interference with the normal operation of the chromatograph.

[0004] However, although the solvent inlet filter mentioned above has a certain degree of versatility and can be connected to hoses of three different diameters, it is still limited by the number of preset first-order, second-order, and third-order connectors. This means that the number of hoses of different diameters it can connect to is limited. In addition, the design of these connectors does not support the free selection of first-order, second-order, and third-order connectors of different diameters according to actual application conditions. Furthermore, when not in use, these connectors are directly exposed to the external environment without necessary protection measures, which may affect their long-term performance stability. Therefore, a solvent inlet filter for chromatographs is proposed to solve the above problems. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides a solvent inlet filter for chromatographs, which has the advantages of being able to connect to hoses of various different diameters, supporting the free addition of pipe fittings of different diameters according to actual application, and providing protection for pipe fittings. This solves the problems of existing solvent inlet filters having a limited number of hoses of different diameters that can be connected, not supporting the free selection and installation of pipe fittings of different diameters according to actual application, and lacking protective measures for pipe fittings.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the present invention provides the following technical solution: a solvent inlet filter for a chromatograph, comprising a filter element, a connecting pipe fixedly installed on the top of the filter element, and a chromatograph hose connection structure provided on the top of the filter element;

[0009] The chromatograph hose connection structure includes a connecting sleeve, a connecting seat, a connecting tube, a pipe connection box, a split head, a split tube, a threaded connector, a chromatograph hose connector, a sliding rod, a spring, a protective cover, a cover plate, a threaded ring, and through holes. The connecting sleeve is fixedly installed on the top of the filter element. The connecting seat is movably installed on the top of the connecting sleeve. The connecting tube is fixedly installed on the bottom of the connecting seat. The pipe connection box is fixedly installed on the top of the connecting seat. A split head is fixedly installed inside the pipe connection box. Five split tubes are fixedly installed outside the split head. Five threaded connectors are fixedly installed on the top of the pipe connection box. Each of the five threaded connectors is threadedly connected to a chromatograph hose connector. A sliding rod is fixedly installed inside the pipe connection box. A spring is sleeved on the outside of the sliding rod. A protective cover is slidably connected to the outside of the pipe connection box. A cover plate is movably installed inside the protective cover. A threaded ring is fixedly installed on the outside of the cover plate. Five through holes are opened inside the cover plate.

[0010] Furthermore, a threaded connecting cylinder is fixedly installed at the bottom of the connecting seat, and the connecting pipe is located inside the threaded connecting cylinder. The connecting seat is threadedly connected to the connecting sleeve through the threaded connecting cylinder.

[0011] Furthermore, the bottom of the connecting pipe is sleeved with the connecting pipe, and the top of the connecting pipe passes through the connecting seat and is connected to the diverter head.

[0012] Furthermore, four of the chromatograph hose connectors are arranged in a ring on the top of the tubing connection box, and the other chromatograph hose connector is located in the center of the top of the tubing connection box.

[0013] Furthermore, the pipe connection box has two sliding rods fixedly installed inside, each sliding rod is fitted with a spring, and each sliding rod is slidably connected to a sliding sleeve that is fixedly connected to the top of the spring.

[0014] Furthermore, the pipe connection box has sliding grooves on both the left and right sides, and connecting rods are fixedly installed on the outside of the two sliding sleeves. The ends of the two connecting rods away from the sliding sleeves pass through the two sliding grooves and are fixedly connected to the inner wall of the protective cover.

[0015] Furthermore, the cover plate is threadedly connected to the protective cover via a threaded ring, and the five through holes correspond to the five chromatograph hose connectors respectively.

[0016] (III) Beneficial Effects

[0017] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0018] 1. This solvent inlet filter for chromatographs features five threaded connectors, each capable of housing different chromatograph hose connectors. Specifically, four chromatograph hose connectors are arranged in a ring at the top of the pipe connection box, while the other is located in the center of the top of the pipe connection box. This design allows the filter to be freely adjusted to connect to different diameter hoses according to experimental needs, greatly increasing its flexibility.

[0019] 2. This solvent inlet filter for chromatographs, when the hose is not connected, has a spring that pushes the sliding sleeve, which in turn causes the protective cover to slide to cover all the connection points, preventing external contaminants from entering. At the same time, the cover plate is threaded to the protective cover via a threaded ring. The cover plate has five through holes that correspond to the chromatograph hose connection points, ensuring that the hose can be easily and quickly connected during use, and effectively sealing the chromatograph hose connection points when not in use to prevent contamination, thereby improving the stability and service life of the entire solvent inlet filter. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0022] Figure 3 This is a schematic diagram of the chromatograph hose connection structure of this utility model;

[0023] Figure 4 This is a top view of the chromatograph hose connector of this utility model;

[0024] Figure 5 This utility model Figure 2 Enlarged diagram of point A in the diagram.

[0025] In the diagram: 1. Filter element; 2. Connecting tube; 3. Chromatograph hose connection structure; 301. Connecting sleeve; 302. Connecting seat; 303. Connecting tube; 304. Pipe connection box; 305. Splitter head; 306. Splitter tube; 307. Threaded connector; 308. Chromatograph hose connector; 309. Sliding rod; 310. Spring; 311. Protective cover; 312. Cover plate; 313. Threaded ring; 314. Through hole. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figure 1-5 In this embodiment, a solvent inlet filter for a chromatograph includes a filter element 1, a connecting pipe 2 fixedly installed on the top of the filter element 1, and a chromatograph hose connection structure 3 provided on the top of the filter element 1.

[0028] The chromatograph hose connection structure 3 includes a connecting sleeve 301, a connecting seat 302, a connecting pipe 303, a pipe connection box 304, a splitter head 305, a splitter pipe 306, a threaded connector 307, a chromatograph hose connector 308, a sliding rod 309, a spring 310, a protective cover 311, a cover plate 312, a threaded ring 313, and a through hole 314. The connecting sleeve 301 is fixedly installed on the top of the filter element 1. The connecting seat 302 is movably installed on the top of the connecting sleeve 301. The connecting pipe 303 is fixedly installed on the bottom of the connecting seat 302. The pipe connection box 304 is fixedly installed on the top of the connecting seat 302. A splitter head is fixedly installed inside the pipe connection box 304. The head 305 has five split pipes 306 fixedly installed on its exterior. The top of the pipe connection box 304 has five threaded connectors 307 fixedly installed. Each of the five threaded connectors 307 is internally threaded with a chromatograph hose connector 308. The pipe connection box 304 has a sliding rod 309 fixedly installed inside. A spring 310 is sleeved on the outside of the sliding rod 309. A protective cover 311 is slidably connected to the outside of the pipe connection box 304. A cover plate 312 is movably installed inside the protective cover 311. A threaded ring 313 is fixedly installed on the outside of the cover plate 312. Five through holes 314 are opened inside the cover plate 312.

[0029] Specifically, filter element 1 is the core part of the filter. The solvent is filtered through filter element 1 to remove impurities, and then transported upward through connecting pipe 2 to chromatograph hose connection structure 3. The bottom of connecting pipe 303 is tightly connected to connecting pipe 2 to ensure smooth liquid flow. The top of connecting pipe 303 passes through connecting seat 302 and is connected to split head 305. Five split pipes 306 are fixedly installed on the outside of split head 305. They guide the solvent to chromatograph hose connection head 308 in five threaded connection head 307, so that multiple solvent inputs can be processed at the same time. When only one or a few chromatograph hose connection heads 308 are needed, the unused chromatograph hose connection head 308 can be removed and a plug can be installed on the corresponding threaded connection head 307.

[0030] Specifically, the installation of the chromatograph hose connector 308 is very flexible. Five threaded connectors 307 can be used to install chromatograph hose connectors 308 of different specifications to accommodate hoses of different diameters. Four of the chromatograph hose connectors 308 are arranged in a ring on the top of the pipe connection box 304, while the other is located in the center of the top of the pipe connection box 304. This layout design allows operators to freely adjust the connection of hoses of different diameters according to experimental needs, increasing the application flexibility of the filter.

[0031] Specifically, to ensure the filter's airtightness when not in use and to prevent external contaminants from entering, a safety mechanism with a protective cover 311 and a cover plate 312 is designed. The cover plate 312 is threadedly connected to the protective cover 311 via a threaded ring 313, and the cover plate 312 has five through holes 314, which correspond to five chromatograph hose connectors 308 respectively. When the hose is not connected, the spring 310 pushes the sliding sleeve, thereby causing the protective cover 311 to slide to cover the positions of all connectors. The movement of the protective cover 311 is achieved through the sliding grooves on both sides of the pipe connection box 304 and the connecting rod fixed on the sliding sleeve. This ensures that the hose can be quickly connected when in use and effectively seals the chromatograph hose connectors 308 when not in use to prevent contamination, thereby improving the stability and service life of the filter.

[0032] In summary, this solvent inlet filter for chromatographs, by setting five threaded connectors 307, and each threaded connector 307 can be fitted with a different chromatograph hose connector 308, specifically, four of the chromatograph hose connectors 308 are arranged in a ring at the top of the pipe connection box 304, and the other chromatograph hose connector 308 is located in the center of the top of the pipe connection box 304. This design allows the filter to be freely adjusted to connect different diameter hoses according to experimental needs, greatly increasing flexibility.

[0033] Furthermore, in this solvent inlet filter for the chromatograph, when the hose is not connected, the spring 310 pushes the sliding sleeve, which in turn causes the protective cover 311 to slide to cover all the connection positions, preventing external contaminants from entering. At the same time, the cover plate 312 is threadedly connected to the protective cover 311 through the threaded ring 313. The cover plate 312 has five through holes 314 that correspond to the chromatograph hose connectors 308, ensuring that the hose can be easily and quickly connected during use, and effectively sealing the chromatograph hose connectors 308 when not in use to prevent contamination. This improves the stability and service life of the entire solvent inlet filter and solves the problems of existing solvent inlet filters having a limited number of hoses of different diameters that can be connected, not supporting the free selection and installation of pipe connectors of different diameters according to actual application conditions, and lacking protective measures for pipe connectors.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A solvent inlet filter for a chromatograph, comprising a filter element (1), characterized in that: A connecting pipe (2) is fixedly installed on the top of the filter element (1), and a chromatograph hose connection structure (3) is provided on the top of the filter element (1). The chromatograph hose connection structure (3) includes a connecting sleeve (301), a connecting seat (302), a connecting pipe (303), a pipe connection box (304), a split head (305), a split pipe (306), a threaded connector (307), a chromatograph hose connector (308), a sliding rod (309), a spring (310), a protective cover (311), a cover plate (312), a threaded ring (313), and a through hole (314). The connecting sleeve (301) is fixedly installed on the top of the filter element (1). The connecting seat (302) is movably installed on the top of the connecting sleeve (301). The connecting pipe (303) is fixedly installed on the bottom of the connecting seat (302). The pipe connection box (304) is fixedly installed on the top of the connecting seat (302). The pipe connection box (304) is fixedly installed inside the pipe connection box (304). A flow divider (305) is provided, with five flow divider tubes (306) fixedly installed on its exterior. Five threaded connectors (307) are fixedly installed on the top of the pipe connection box (304). Each of the five threaded connectors (307) is internally threaded with a chromatograph hose connector (308). A sliding rod (309) is fixedly installed inside the pipe connection box (304). A spring (310) is sleeved on the outside of the sliding rod (309). A protective cover (311) is slidably connected to the outside of the pipe connection box (304). A cover plate (312) is movably installed inside the protective cover (311). A threaded ring (313) is fixedly installed on the outside of the cover plate (312). Five through holes (314) are opened inside the cover plate (312).

2. The solvent inlet filter for a chromatograph according to claim 1, characterized in that: A threaded connecting cylinder is fixedly installed at the bottom of the connecting seat (302), and the connecting pipe (303) is located inside the threaded connecting cylinder. The connecting seat (302) is threadedly connected to the connecting sleeve (301) through the threaded connecting cylinder.

3. A solvent inlet filter for a chromatograph according to claim 1, characterized in that: The bottom of the connecting pipe (303) is sleeved with the connecting pipe (2), and the top of the connecting pipe (303) passes through the connecting seat (302) and is connected to the diverter head (305).

4. A solvent inlet filter for a chromatograph according to claim 1, characterized in that: Four of the chromatograph hose connectors (308) are arranged in a ring on the top of the pipe connection box (304), and the other chromatograph hose connector (308) is located in the center of the top of the pipe connection box (304).

5. A solvent inlet filter for a chromatograph according to claim 1, characterized in that: The pipe connection box (304) has two sliding rods (309) fixedly installed inside. Each sliding rod (309) is fitted with a spring (310) on its outside, and each sliding rod (309) is slidably connected to a sliding sleeve that is fixedly connected to the top of the spring (310).

6. A solvent inlet filter for a chromatograph according to claim 5, characterized in that: The pipe connection box (304) has sliding grooves on both the left and right sides. Connecting rods are fixedly installed on the outside of the two sliding sleeves, and the ends of the two connecting rods away from the sliding sleeves pass through the two sliding grooves and are fixedly connected to the inner wall of the protective cover (311).

7. A solvent inlet filter for a chromatograph according to claim 1, characterized in that: The cover plate (312) is threadedly connected to the protective cover (311) via a threaded ring (313), and the five through holes (314) correspond to the five chromatograph hose connectors (308) respectively.

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