Column oven for chromatographic instrument

Abstract

The column oven comprises a column oven body, a heat exchange cavity is formed in the column oven body, an air inlet groove and an air outlet groove are formed in the heat exchange cavity, a partition plate is fixedly assembled between the air inlet groove and the air outlet groove, a cooling fan is fixedly assembled on the side wall of the partition plate, an air inlet assembly is fixedly assembled in the air inlet groove, and an air outlet assembly is fixedly assembled in the air outlet groove. And an air outlet assembly is fixedly assembled in the air outlet groove. Through mutual cooperation of the air inlet assembly and the air outlet assembly, the heat exchange cavity can be sealed in the heating unit heating process, so that the heating unit temperature rising process is faster, the chromatographic column heating efficiency of the heating unit is improved, and when the chromatographic column needs to be cooled, the chromatographic column can be cooled by controlling the air inlet assembly and the air outlet assembly. The heat exchange cavity is communicated with the external environment, and the arranged cooling fan drives air to circulate in the heat exchange cavity, so that the heating unit can be quickly cooled, and the chromatographic column can be conveniently cooled to a specified temperature.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of chromatograph, specifically relates to a column oven for chromatograph. BACKGROUND

[0002] The chromatograph column oven is important equipment for temperature control of the chromatographic column in the chromatographic analysis process. It can provide a constant and uniform temperature environment to ensure the accuracy and repeatability of chromatographic analysis. The design of the chromatograph column oven usually includes a heating cavity, in which the chromatographic column can be placed, and the temperature in the cavity is adjusted by the built-in temperature control system to control the temperature of the chromatographic column. However, the existing temperature control system in the column oven is relatively single, and the overall response speed is relatively slow during the heating and cooling process of the chromatographic column by the heating unit, thereby reducing the heating and cooling efficiency of the chromatographic column. Therefore, we propose a column oven for chromatograph. SUMMARY

[0003] The utility model aims at providing a column oven for chromatograph to solve the problems raised in the background.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a column oven for chromatograph, comprising a column oven main body, a heat exchange cavity is opened in the column oven main body, an air inlet groove and an air outlet groove are arranged in the heat exchange cavity, a partition plate is fixedly assembled between the air inlet groove and the air outlet groove, a heat dissipation fan is fixedly assembled on the side wall of the partition plate, an air inlet assembly is fixedly assembled in the air inlet groove, and an air outlet assembly is fixedly assembled in the air outlet groove.

[0005] Preferably, the air inlet assembly comprises a fixed plate, the fixed plate is fixedly assembled in the air inlet groove, a connecting groove is arranged between the fixed plate and the air inlet groove, a first telescopic air cylinder is fixedly assembled on the side wall of the connecting groove, a connecting plate is fixedly connected to the output end of the first telescopic air cylinder, first shielding frames are fixedly connected to both ends of the connecting plate, first air inlet holes are uniformly arranged on the side wall of the first shielding frame, and second air inlet holes are uniformly arranged on the side wall of the air inlet groove.

[0006] Preferably, a limiting assembly is assembled between the connecting plate and the connecting groove, the limiting assembly comprises a limiting plate, the limiting plate is fixedly connected to the side wall of the connecting plate, a limiting groove is arranged on the side wall of the connecting groove, the limiting plate is slidingly connected in the limiting groove, and a first limiting shaft penetrating through the limiting plate is fixedly assembled in the limiting groove.

[0007] Preferably, the air outlet assembly comprises an assembly groove which is integrally formed on the side wall of the air outlet groove, a second shielding frame is slidingly connected in the assembly groove, first air outlet holes are uniformly formed in the side wall of the second shielding frame, second air outlet holes are uniformly formed in the side wall of the assembly groove, and a second telescopic cylinder is fixedly arranged on the inner cavity side wall of the air outlet groove and fixedly connected with the side wall of the second shielding frame.

[0008] Preferably, a second limiting shaft is fixedly arranged in the assembly groove and penetrates the second shielding frame.

[0009] Compared with the prior art, the column oven has the advantages that the column oven main body is newly arranged and designed, the air inlet assembly and the air outlet assembly are arranged in the air inlet groove and the air outlet groove respectively, the heat exchange cavity can be closed during the heating process of the heating unit through the cooperation of the air inlet assembly and the air outlet assembly, the temperature rising process of the heating unit is more rapid, the heating efficiency of the heating unit on the chromatographic column is improved, when the chromatographic column needs to be cooled, the heat exchange cavity is connected with the external environment through the control of the air inlet assembly and the air outlet assembly, air is circulated in the heat exchange cavity through the cooling fan, the heating unit can be rapidly cooled, and the chromatographic column can be conveniently cooled to a specified temperature. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is a structural schematic view of the utility model.

[0011] Figure 2 It is a structural schematic view of the air inlet assembly.

[0012] Figure 3 It is a structural schematic view of the first shielding frame.

[0013] Figure 4 It is a structural schematic view of the air outlet assembly.

[0014] Figure 5 It is a structural schematic view of the heat exchange cavity in a closed state.

[0015] In the drawing: 1, column oven main body; 2, heat exchange cavity; 21, air inlet groove; 22, air outlet groove; 23, partition; 3, air inlet assembly; 31, fixed plate; 32, connecting groove; 33, first telescopic cylinder; 34, connecting plate; 35, first shielding frame; 36, first air inlet hole; 37, second air inlet hole; 4, cooling fan; 5, air outlet assembly; 51, assembly groove; 52, second shielding frame; 53, first air outlet hole; 54, second air outlet hole; 55, second telescopic cylinder; 6, limiting assembly; 61, limiting plate; 62, limiting groove; 63, first limiting shaft; 7, second limiting shaft. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the utility model will be clearly and completely described in connection with the drawings in the embodiments of the utility model.

[0017] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 And Figure 5 , the utility model provides a technical scheme: a column oven for chromatograph, including column oven main body 1, column oven main body 1 is the liquid chromatograph column oven in prior art, its front end is equipped with the fixed frame for clamping and fixing chromatographic column, the inner chamber of column oven main body 1 is opened and is equipped with heat exchange cavity 2, and the detachable cover (not shown in the drawing) is used to close the top of heat exchange cavity 2 in the process of using, the front end of heat exchange cavity 2 is equipped with the heating unit for heating chromatographic column, and the heat dissipation fin is arranged in the heating unit, the utility model has redesigned heat exchange cavity 2, and designs air inlet assembly 3, heat dissipation fan 4 and air outlet assembly 5 in heat exchange cavity 2, by reasonable layout, can make heating unit seal heat exchange cavity 2 when the temperature of chromatographic column is raised, improve the heating efficiency of heating unit, and when the chromatographic column needs to be cooled, through the cooperation of air inlet assembly 3, heat dissipation fan 4 and air outlet assembly 5, the circulation effect of air in heat exchange cavity 2 can be accelerated, the heat dissipation effect of heat dissipation fin is improved, and the cooling of heating unit to chromatographic column is accelerated.

[0018] As shown in Figure 1 , heat exchange cavity 2 is provided with air inlet groove 21 and air outlet groove 22, air inlet assembly 3 is assembled in air inlet groove 21, air outlet assembly 5 is assembled in air outlet groove 22, air inlet groove 21 and air outlet groove 22 are fixedly connected with the partition 23, and the heat dissipation fan 4 is fixedly connected to the side wall of the partition 23, the partition 23 is in a hollow shape, and the hollow position is used to drive the air flow in air inlet groove 21 and air outlet groove 22 by heat dissipation fan 4, and the heat dissipation fan 4 is electrically connected with external power supply, and the heat dissipation fan 4 drives air to flow from air inlet groove 21 to air outlet groove 22.

[0019] As shown in Figure 1 and Figure 2As shown in the middle, the air inlet assembly 3 includes a fixed plate 31, fixed plate 31 fixedly assembled in the middle of the air inlet slot 21, the fixed plate 31 and the front and rear two side walls of the air inlet slot 21 form a connecting groove 32, the front and rear side walls in the two connecting grooves 32 are respectively fixedly assembled with a first telescopic cylinder 33, the first telescopic cylinder 33 is connected with an external air pump and an external controller, the output end of the first telescopic cylinder 33 is controlled to lift by the external controller controlling the air pump, the stroke of the output end of the first telescopic cylinder 33 is fixed after each time receiving the control instruction, the output end of the first telescopic cylinder 33 is fixedly connected with a connecting plate 34, the two ends of the connecting plate 34 are respectively fixedly connected with a first shielding frame 35, the side wall of the first shielding frame 35 is uniformly provided with a first air inlet hole 36, the side wall of the air inlet slot 21 is uniformly provided with a second air inlet hole 37, the action of the first telescopic cylinder 33 driving the first shielding frame 35 can make the first air inlet hole 36 coincide with or stagger with the second air inlet hole 37, when the positions of the first air inlet hole 36 and the second air inlet hole 37 correspond, air can enter the air inlet slot 21 through the first air inlet hole 36 and the second air inlet hole 37, when the positions of the first air inlet hole 36 and the second air inlet hole 37 stagger, the first shielding frame 35 shields the second air inlet hole 37, realizing the closure of the air inlet slot 21.

[0020] The side wall of the connecting plate 34 is integrally formed with a limiting plate 61, the limiting plate 61 is slidingly connected in a limiting groove 62, a first limiting shaft 63 penetrating the limiting plate 61 is fixedly assembled in the limiting groove 62, the first limiting assembly 6 composed of the limiting plate 61, the limiting groove 62 and the first limiting shaft 63 limits the movement stroke of the first shielding frame 35, and the stability of the movement stroke of the first shielding frame 35 is strengthened.

[0021] Setting four groups of first telescopic cylinders 33 to drive the first shielding frame 35 to act can effectively support the first shielding frame 35 and improve the stability of the first shielding frame 35 during the lifting stroke.

[0022] As shown in the middle, the air inlet assembly 3 includes a fixed plate 31, fixed plate 31 fixedly assembled in the middle of the air inlet slot 21, the fixed plate 31 and the front and rear two side walls of the air inlet slot 21 form a connecting groove 32, the front and rear side walls in the two connecting grooves 32 are respectively fixedly assembled with a first telescopic cylinder 33, the first telescopic cylinder 33 is connected with an external air pump and an external controller, the output end of the first telescopic cylinder 33 is controlled to lift by the external controller controlling the air pump, the stroke of the output end of the first telescopic cylinder 33 is fixed after each time receiving the control instruction, the output end of the first telescopic cylinder 33 is fixedly connected with a connecting plate 34, the two ends of the connecting plate 34 are respectively fixedly connected with a first shielding frame 35, the side wall of the first shielding frame 35 is uniformly provided with a first air inlet hole 36, the side wall of the air inlet slot 21 is uniformly provided with a second air inlet hole 37, the action of the first telescopic cylinder 33 driving the first shielding frame 35 can make the first air inlet hole 36 coincide with or stagger with the second air inlet hole 37, when the positions of the first air inlet hole 36 and the second air inlet hole 37 correspond, air can enter the air inlet slot 21 through the first air inlet hole 36 and the second air inlet hole 37, when the positions of the first air inlet hole 36 and the second air inlet hole 37 stagger, the first shielding frame 35 shields the second air inlet hole 37, realizing the closure of the air inlet slot 21. Figure 1 and Figure 4As shown in the middle, the air outlet assembly 5 includes assembly slot 51, assembly slot 51 is symmetrical left and right opening in the side wall of the air outlet slot 22, the second shielding frame 52 is slidingly connected in the assembly slot 51, the side wall of the second shielding frame 52 is uniformly provided with the first air outlet hole 53, the side wall of the assembly slot 51 is uniformly provided with the second air outlet hole 54, the inner cavity side wall of the air outlet slot 22 is fixedly provided with the second telescopic cylinder 55, the output end of the second telescopic cylinder 55 is fixedly connected with the side wall of the second shielding frame 52, the action stroke of the output end of the second telescopic cylinder 55 is also fixedly arranged, the second telescopic cylinder 55 is connected with an external air pump and an external controller, the action of the first telescopic cylinder 33 and the second telescopic cylinder 55 can be synchronously controlled through the external controller, the first air outlet hole 53 and the second air outlet hole 54 are overlapped or staggered through the action of the second shielding frame 52 in the assembly slot 51, the communication or closure of the air outlet slot 22 and the external environment is realized.

[0023] As Figure 4 As shown in the middle, the assembly slot 51 is fixedly provided with the second limiting shaft 7 which is symmetrically distributed upward and downward, the second limiting shaft 7 penetrates the second shielding frame 52, the second shielding frame 52 is limited through the second limiting shaft 7, and the stability of the action stroke of the second shielding frame 52 in the assembly slot 51 is improved.

[0024] Working principle: as Figure 1 And Figure 5 As shown in the middle, Figure 5 The air inlet assembly 3 and the air outlet assembly 5 are in a closed state, at this time the whole heat exchange cavity 2 is in a closed state, the heating unit in the column temperature box body 1 can heat and warm up the chromatographic column assembled in the front clamping frame, due to the closure of the heat exchange cavity 2, the heating speed of the heating unit on the chromatographic column can be effectively improved, and the specified setting temperature can be quickly reached, when the chromatographic column needs to be cooled, the first telescopic cylinder 33 and the second telescopic cylinder 55 are controlled to act through the external controller, so that the air inlet slot 21 and the air outlet slot 22 are communicated, the heat exchange cavity 2 is communicated with the external environment, and the cooling fan 4 is started, the air flow in the heat exchange cavity 2 can be effectively accelerated through the cooling fan 4, the cooling of the cooling fins of the heating unit is carried out through the flowing air, and the cooling speed of the heating unit and the chromatographic column is effectively improved.

Claims

1. A column oven for a chromatograph comprising a column oven main body (1), characterized by: The heat exchange cavity (2) is arranged in the column oven body (1), the air inlet groove (21) and the air outlet groove (22) are arranged in the heat exchange cavity (2), the partition plate (23) is fixedly assembled between the air inlet groove (21) and the air outlet groove (22), the side wall of the partition plate (23) is fixedly assembled with the heat dissipation fan (4), the air inlet assembly (3) is fixedly assembled in the air inlet groove (21), and the air outlet assembly (5) is fixedly assembled in the air outlet groove (22).

2. The column oven for chromatography according to claim 1, characterized in that: The air inlet assembly (3) comprises a fixed plate (31) fixedly assembled in the air inlet groove (21), a connecting groove (32) is arranged between the fixed plate (31) and the air inlet groove (21), a first telescopic air cylinder (33) is fixedly assembled on the side wall of the connecting groove (32), a connecting plate (34) is fixedly connected to the output end of the first telescopic air cylinder (33), first shielding frames (35) are fixedly connected to the two ends of the connecting plate (34) respectively, first air inlet holes (36) are uniformly arranged in the side wall of the first shielding frame (35), and second air inlet holes (37) are uniformly arranged in the side wall of the air inlet groove (21).

3. The column oven for chromatography according to claim 2, characterized in that: A limiting assembly (6) is assembled between the connecting plate (34) and the connecting groove (32), the limiting assembly (6) comprises a limiting plate (61) fixedly connected to the side wall of the connecting plate (34), a limiting groove (62) is arranged in the side wall of the connecting groove (32), the limiting plate (61) is slidably connected in the limiting groove (62), and a first limiting shaft (63) penetrating through the limiting plate (61) is fixedly assembled in the limiting groove (62).

4. The column oven for chromatography according to claim 1, characterized by: The air outlet assembly (5) comprises an assembly groove (51) which is integrally formed on the side wall of the air outlet groove (22), a second shielding frame (52) is slidably connected in the assembly groove (51), first air outlet holes (53) are uniformly arranged in the side wall of the second shielding frame (52), second air outlet holes (54) are uniformly arranged in the side wall of the assembly groove (51), a second telescopic air cylinder (55) is fixedly assembled on the inner cavity side wall of the air outlet groove (22), and the output end of the second telescopic air cylinder (55) is fixedly connected with the side wall of the second shielding frame (52).

5. A column oven for a chromatograph according to claim 4, characterized in that: The second limiting shaft (7) penetrating through the second shielding frame (52) is fixedly assembled in the assembly groove (51).

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