Knife type chromatographic column assembly, heat preservation seat matched with knife type chromatographic column assembly and plate type column box

Abstract

The utility model provides a knife type chromatographic column assembly and a heat preservation seat and a plate type column box matched with the knife type chromatographic column assembly, the knife type chromatographic column assembly comprises a heat preservation cover plate, one side of the heat preservation cover plate is provided with an annular chromatographic column, the annular chromatographic column is connected with the cover plate through a gas inlet end and a gas outlet end, the end part of the gas inlet end is a gas supply port, and the end part of the gas outlet end is a gas outlet. The gas inlet is used for inputting and outputting gas; a heat conduction block is embedded in the annular chromatographic column, the annular chromatographic column and the heat conduction block are tightly attached to form a drawing and inserting structure, and the chromatographic column only needs to be inserted and pulled out from one side of the column box when being replaced, so that the chromatographic column is replaced; and the knife type chromatographic column component heat preservation seat is matched with the components and is provided with a U-shaped groove matched with the knife type chromatographic column component. The plate type column box comprises the knife type chromatographic column assembly and the heat preservation seat, the structure is simple, the knife type chromatographic column assembly can be pulled out from one side of the plate type column box, the chromatographic column can be inserted into the column box after being replaced, then the replacement of the chromatographic column is completed, the operation is simple, the disassembly and assembly are convenient, and the rapid replacement of the chromatographic column can be realized.

Description

Technical Field

[0001] This utility model belongs to the field of gas chromatography columns, specifically designing a knife-type chromatography column assembly and a matching heat-insulating base and plate-type column box. Background Technology

[0002] Chromatographic columns in chromatographic detection equipment require a stable temperature environment to ensure normal chromatographic detection. After long-term use, the separation efficiency of the column decreases, necessitating column replacement. Currently, common column temperature control devices are broadly classified into two types: air-bath column ovens and plate-heated column ovens. Air-bath column ovens offer convenient column replacement but suffer from poor temperature uniformity and a long stabilization time. Plate-heated column ovens provide good temperature uniformity but make column replacement difficult.

[0003] The prior art (2016102406428) discloses a heat preservation box for a gas chromatography column, which consists of a metal outer shell with a cover, a heat preservation layer, a heating shell with a cover, and a heat source with an electric heating rod. The gas chromatography column is installed in the heating space between the heating source and the heating shell to heat and keep the column warm. However, when the column needs to be replaced, the metal outer shell and the heating shell need to be disassembled before replacement, which is very inconvenient.

[0004] The prior art (2012207279498) discloses a column heating and insulation box and a rapid gas chromatography device using the same. An annular chromatographic mounting cavity is formed between the heating shell and the heating core. A cover plate is fixedly installed at the front end of the heating shell and the heating core. However, the operation is complicated when changing the chromatographic column. Utility Model Content

[0005] To address the technical problems existing in the prior art, this utility model provides a blade-type chromatography column assembly and a matching heat-insulating base and plate-type column oven.

[0006] The technical solution adopted in this utility model is achieved through the following means:

[0007] A blade-type chromatography column assembly includes a heat-insulating cover plate, an annular chromatography column is disposed on one side of the heat-insulating cover plate, the annular chromatography column is connected to the cover plate through an inlet end and an outlet end (502), the end of the inlet end is a gas supply port, and the end of the outlet end is an outlet, the gas supply port and the outlet end are used for gas input and output; a heat-conducting block is embedded in the annular chromatography column, and the chromatography column and the heat-conducting block are tightly fitted to form a pull-in structure.

[0008] The insulation base that cooperates with the above-mentioned blade chromatography column assembly has a "U"-shaped groove to accommodate the blade chromatography column assembly.

[0009] A plate-type column oven includes the aforementioned blade-type chromatographic column assembly and a heat-insulating base. One side of the heat-insulating base is provided with a groove a that cooperates with a heating plate to limit the heating plate, and the other side is provided with an elastic heat-insulating side plate b. The elastic heat-insulating side plate b applies an elastic force to make the heat-conducting block tightly fit the heating plate. The other side of the heating plate is provided with a heat-insulating side plate a, forming a heat-insulating cavity with a central "U"-shaped groove. A box body is provided on the outer surface of the heat-insulating cavity.

[0010] Furthermore, the heat-insulating side plate b is provided with a through hole to accommodate the compression spring. One end of the compression spring abuts against the box body, and the other end of the compression spring abuts against the heat-conducting block so that the heat-conducting block is tightly attached to the heating plate.

[0011] Furthermore, the box includes an outer shell body, and an outer shell side plate is fixed to the side of the outer shell body to form a box without a cover on one side.

[0012] Furthermore, the compression spring consists of a pressure plate and a mounting base. The pressure plate includes a first spring and a second spring. One end of the first spring is connected to one end of the second spring, and the two form an obtuse angle α. The other end of the first spring is provided with a first bend, and the two form an obtuse angle β. The other end of the second spring is provided with a second bend, and the two form an obtuse angle β′. The first bend, the first spring, the second spring, and the second bend are formed by bending a single plate.

[0013] Furthermore, the mounting base includes a first mounting base and a second mounting base. The first mounting base is T-shaped and fixedly connected to the lower surface of the first bend. The second mounting base is inverted T-shaped and fixedly connected to the upper surface of the second bend. The pressure plate is fixedly connected to the outer shell side plate through the mounting base.

[0014] Furthermore, the working stroke of the pressing tablet is greater than the depth of the through hole, and the connection between the first and second spring sheets in the pressing tablet passes through the through hole and contacts the heat-conducting block, so that the heat-conducting block and the heating plate are tightly attached.

[0015] Furthermore, connectors are provided on both sides of the heating plate, and the heating plate is fixedly connected to the inner wall of the outer shell body through the connectors.

[0016] Furthermore, the connector is made of heat-insulating material.

[0017] Furthermore, the heating plate adopts a metal plate heating method and is equipped with heating elements and temperature measuring elements.

[0018] Compared to existing technologies, this invention designs the chromatographic column as a knife-type column assembly with a removable structure. When replacing the column, it can be easily replaced by inserting and removing it from one side of the column box, simplifying the operation and allowing for quick column replacement. The knife-type column assembly insulation base, which works in conjunction with the above-mentioned assembly, has a U-shaped groove that mates with the knife-type column assembly. The plate-type column box, including the knife-type column assembly and its corresponding insulation base, is a device for insulating the chromatographic column. The plate-type column box designed in this invention has a simple structure and small size. The knife-type column assembly can be completely pulled out from one side of the plate-type column box. After replacing the column, the entire assembly can be inserted back into the column box to complete the replacement. This simple operation and convenient assembly / disassembly enable rapid column replacement. Attached Figure Description

[0019] Figure 1 This is an exploded view of this utility model.

[0020] Figure 2 This is a schematic diagram of the structure of this utility model.

[0021] Figure 3 This is a schematic diagram of the internal structure of this utility model.

[0022] Figure 4 This is a schematic diagram of the overall design of this utility model.

[0023] Figure 5 This is a schematic diagram of a compression spring structure.

[0024] Figure 6 This is a schematic diagram of the heating plate disassembled.

[0025] The components include: outer shell body 1; notch 101; heat-insulating side plate a201; heat-insulating seat 202; heat-insulating side plate b203; through hole 204; groove a205; "U" shaped groove 206; heating plate 3; connector 301; heating element 302; temperature measuring element 303; heat-insulating cover plate 4; air supply port 401; exhaust port 402; chromatographic column 5; air inlet end 501; exhaust end 502; heat-conducting block 6; compression spring 7; pressure plate 710; first spring 711; second spring 712; first bending part 713; second bending part 714; mounting base 720; first mounting base 721; second mounting base 722; and outer shell side plate 8. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0027] This utility model provides a blade-type chromatography column assembly, see reference. Figures 1-3The system includes a heat-insulating cover plate 4, with an annular chromatographic column 5 mounted on one side of the cover plate 4. The annular chromatographic column 5 is connected to the cover plate 4 via an inlet end 501 and an outlet end 502. The inlet end 501 is a gas supply port 401, and the outlet end 502 is an outlet 402, used for gas input and output. A heat-conducting block 6 is embedded within the annular chromatographic column 5, and the column 5 and the heat-conducting block 6 are tightly fitted together to form a pull-in / pull-out structure. The tight fit between the heat-conducting block 6 and the annular chromatographic column 5 ensures that the annular chromatographic column 5 is heated evenly and sufficiently. The column is designed as a pull-in / pull-out blade structure, allowing for easy insertion and removal. When replacing the column, it can be easily replaced by inserting or removing it from one side of the column box.

[0028] This utility model provides a heat preservation base for a blade-type chromatography column assembly that cooperates with the above-mentioned components. (See reference...) Figure 1 The heat preservation base is provided with a "U"-shaped groove 206 to accommodate the blade chromatography column assembly, and the heat preservation base and the blade chromatography column assembly cooperate with each other.

[0029] This utility model provides a plate-type column box, see reference. Figures 1-5 The system includes a blade-type chromatographic column assembly and a corresponding blade-type chromatographic column assembly insulation seat. One side of the insulation seat has a groove a205 that mates with a heating plate 3, limiting the position of the heating plate 3. The other side is fitted with an elastic insulation side plate b203, which applies elastic force to ensure the heat-conducting block 6 is tightly fitted to the heating plate 3, ensuring good contact and uniform temperature. The other side of the heating plate 3 has an insulation side plate a201, forming an insulation cavity with a U-shaped groove in the middle. The blade-type chromatographic column assembly is installed in the insulation cavity with the U-shaped groove to heat and insulate the chromatographic column. The blade-type chromatographic column assembly can be inserted or removed from the insulation cavity for easy column replacement. A box is installed on the outer surface of the insulation cavity to fix the insulation side plate a201, the heat-conducting block 6 insulation seat 202, and the insulation side plate b203, preventing radial movement that could affect the insulation effect and also serving as a dustproof and limiting function.

[0030] The heat-insulating side plate b203 is provided with a through hole 204 to accommodate the compression spring 7. One end of the compression spring 7 abuts against the box body, and the other end of the compression spring 7 abuts against the heat-conducting block 6 so that the heat-conducting block 6 is tightly attached to the heating plate 3.

[0031] The box includes an outer shell body 1, and an outer shell side plate 8 is fixed to the side of the outer shell body 1 to form a box without a cover on one side. The box is fixedly connected to the heat insulation cover to form a sealed space, which serves to prevent dust and limit movement.

[0032] like Figure 5As shown, the compression spring 7 consists of a pressure plate 710 and a mounting base 720. The pressure plate 710 includes a first spring 711 and a second spring 712. One end of the first spring 711 is connected to one end of the second spring 712, forming an obtuse angle α. The other end of the first spring 711 has a first bending portion 713, forming an obtuse angle β. The other end of the second spring 712 has a second bending portion 714, forming an obtuse angle β′. The first bending portion 713, the first spring 711, the second spring 712, and the second bending portion 714 are formed by bending a single plate. Preferably, the angle α is 120~160°, and the angles β and β′ are 100~120°. The working stroke of the pressure plate 710 is greater than the depth of the through hole 204. The connection between the first spring 711 and the second spring 712 in the pressure plate 710 passes through the through hole 204 and contacts the heat-conducting block 6, ensuring good contact between the heat-conducting block 6 and the heating plate 3.

[0033] The mounting base 720 includes a first mounting base 721 and a second mounting base 722. The first mounting base 721 is T-shaped and fixedly connected to the lower surface of the first bent portion 713. The second mounting base 722 is inverted T-shaped and fixedly connected to the upper surface of the second bent portion 714. The pressure plate 710 is fixedly connected to the outer shell side plate 8 through the mounting base 720. The mounting base and the pressure plate are fixedly connected by screws, and the mounting base is fixedly connected to the center of the side of the outer shell.

[0034] Connectors 301 are provided on both sides of the heating plate 3, and the heating plate 3 is fixedly connected to the inner wall of the outer shell body 1 through the connectors 301.

[0035] The connector 301 is made of heat-insulating material, preferably heat-insulating ceramic, to prevent heat from being transferred to the outer shell and causing heat loss.

[0036] like Figure 6 As shown, the heating plate 3 adopts a metal plate heating method and is equipped with a heating element 302 and a temperature measuring element 303. The heating element is a stainless steel heating rod, and the temperature measuring element is a ceramic platinum resistance thermometer. The temperature is controlled by the heating rod and the platinum resistance thermometer, resulting in good temperature uniformity and high temperature control sensitivity.

[0037] The lower edge of the outer shell body 1 is provided with a notch 101. The insulation layer is made of soft material. The heating plate wires can pass through the gaps in the insulation layer and converge at the notch of the outer shell body 1. The notch of the outer shell body 1 is connected to an external power source.

[0038] Working process: A main body and side panels are installed on the outer surface of the insulated cavity with a "U"-shaped groove in the middle. The main body and side panels are fixedly connected by screws to form the box. The blade-type chromatographic column assembly is placed into the insulated cavity with the "U"-shaped groove. The insulated cover is fixedly connected to the main body of the outer shell with screws for sealing. The compression spring abuts against the heat-conducting block, so that the heat-conducting block is tightly attached to the heating plate, resulting in more uniform and rapid heat conduction and high chromatographic analysis efficiency. When it is necessary to replace the chromatographic column, the insulated cover, chromatographic column and heat-conducting block are pulled out of the box as a whole. After replacing the chromatographic column, the whole assembly is inserted back into the box to complete the replacement of the chromatographic column. The operation is simple and the disassembly and assembly are convenient.

[0039] The blade-type chromatography column assembly provided by this utility model has a pull-in structure. When replacing the chromatography column, it is only necessary to insert or pull it from one side of the column oven to complete the replacement of the chromatography column.

[0040] This utility model provides a heat preservation base for a knife-type chromatography column assembly that cooperates with the above-mentioned components, having a "U"-shaped groove that cooperates with the knife-type chromatography column assembly.

[0041] This utility model provides a plate-type column oven, a device for heat preservation of chromatographic columns. The plate-type column oven designed in this utility model has a simple structure and small size. The entire blade-type chromatographic column assembly can be extracted from one side of the column oven. After replacing the column, the entire assembly can be inserted back into the column oven to complete the column replacement. The operation is simple, disassembly and assembly are convenient, and it can achieve rapid column replacement. The heating element is a metal plate heater, using a heating rod and platinum resistance thermometer to control the temperature, resulting in good temperature uniformity and high temperature control sensitivity. This utility model is suitable for gas chromatography columns and features good temperature uniformity, short temperature stabilization time, and convenient column replacement.

[0042] The above description is only a preferred embodiment of the present utility model. It should be noted that those skilled in the art can make several changes and improvements without departing from the overall concept of the present utility model, and these should also be considered within the protection scope of the present utility model.

Claims

1. A knife-type chromatography column assembly, characterized in that, It includes a heat-insulating cover plate (4), and an annular chromatographic column (5) is provided on one side of the heat-insulating cover plate (4). The annular chromatographic column (5) is connected to the cover plate (4) through an air inlet (501) and an exhaust end (502). The end of the air inlet (501) is a gas supply port (401), and the end of the exhaust end (502) is an exhaust port (402). The gas supply port (401) and the exhaust port (402) are used for gas input and output. A heat-conducting block (6) is embedded in the annular chromatographic column (5). The chromatographic column (5) and the heat-conducting block (6) are closely fitted to form a pull-in structure.

2. A heat-insulating base for a knife-type chromatography column assembly, wherein the heat-insulating base cooperates with the knife-type chromatography column assembly according to claim 1, characterized in that, The insulation base is provided with a "U"-shaped groove (206) to accommodate the blade chromatography column assembly.

3. A plate-type column oven, comprising the blade-type chromatography column assembly of claim 1 and the heat-insulating base of claim 2, characterized in that: The heat-insulating seat has a groove a (205) on one side that cooperates with the heating plate (3) to limit the heating plate (3), and an elastic heat-insulating side plate b (203) on the other side. The elastic heat-insulating side plate b (203) applies elastic force to make the heat-conducting block (6) fit tightly against the heating plate (3); the heat-insulating side plate a (201) is provided on the other side of the heating plate (3) to form a heat-insulating cavity with a "U" shaped groove in the middle; a box is provided on the outer surface of the heat-insulating cavity.

4. A plate-type column box as described in claim 3, characterized in that, The heat-insulating side plate b (203) is provided with a through hole (204) for accommodating the compression spring (7). One end of the compression spring (7) abuts against the box body, and the other end of the compression spring (7) abuts against the heat-conducting block (6) so that the heat-conducting block (6) fits tightly against the heating plate (3).

5. A plate-type column box as described in claim 4, characterized in that, The box includes an outer shell body (1), and an outer shell side plate (8) is fixed to the side of the outer shell body (1) to form a box without a cover on one side.

6. A plate-type column box as described in claim 5, characterized in that: The compression spring (7) is composed of a pressure plate (710) and a mounting base (720). The pressure plate (710) includes a first spring (711) and a second spring (712). One end of the first spring (711) is connected to one end of the second spring (712), and the two form an obtuse angle α. The other end of the first spring (711) is provided with a first bend (713), and the two form an obtuse angle β. The other end of the second spring (712) is provided with a second bend (714), and the two form an obtuse angle β′. The first bend (713), the first spring (711), the second spring (712), and the second bend (714) are formed by bending a single plate. The mounting base (720) includes a first mounting base (721) and a second mounting base (722). The first mounting base (721) is T-shaped and is fixedly connected to the lower surface of the first bent portion (713). The second mounting base (722) is inverted T-shaped and is fixedly connected to the upper surface of the second bent portion (714). The pressure plate (710) is fixedly connected to the outer shell side plate (8) through the mounting base (720). The working stroke of the pressing plate (710) is greater than the depth of the through hole (204). The connection between the first spring sheet (711) and the second spring sheet (712) in the pressing plate (710) passes through the through hole (204) and contacts the heat-conducting block (6), so that the heat-conducting block (6) and the heating plate (3) fit tightly together.

7. A plate-type column box as described in claim 3, characterized in that, Connectors (301) are provided on both sides of the heating plate (3), and the heating plate (3) is fixedly connected to the inner wall of the outer shell body (1) through the connectors (301).

8. A plate-type column box as described in claim 7, characterized in that, The connector (301) is made of heat-insulating material.

9. A plate-type column box as described in claim 4, characterized in that, The heating plate (3) is a metal plate heating element, which contains heating elements and temperature measuring elements.

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