Self-cleaning anti-pollution chromatographic column oven

Abstract

The invention provides a self-cleaning anti-pollution chromatographic column oven, which relates to the technical field of chromatographic analysis equipment, and comprises a column oven body and a self-cleaning structure, a fixed convex frame is fixedly connected to the rear side of the column oven body, a filter screen is mounted in the fixed convex frame, a self-cleaning structure is arranged on the outer side of the filter screen, the self-cleaning structure comprises a connecting support plate which is fixedly connected to the upper end and the lower end of the fixed convex frame, and extending convex blocks are fixedly connected to the two ends of the connecting support plate; through the arrangement of the self-cleaning structure, the heat dissipation filter screen blocked by dust accumulation can be automatically cleaned and dredged, it is ensured that the chromatographic column oven always maintains excellent heat dissipation performance, meanwhile, the stable heat dissipation performance guarantees accurate temperature regulation and control of the column oven, the separation effect of a chromatographic column is remarkably improved, and the service life of the chromatographic column oven is prolonged. The accuracy and repeatability of an analysis result are improved; equipment overheating is avoided, the service life of the column oven and key parts is prolonged, the fault occurrence rate is reduced, the downtime is shortened, and efficient and continuous chromatographic analysis work is assisted.

Description

Technical Field

[0001] The present invention relates to the technical field of chromatographic analysis equipment, and particularly to a self-cleaning and anti-pollution chromatographic column oven. Background Art

[0002] In the field of modern chromatographic analysis, a chromatographic column oven is an extremely crucial piece of equipment. Its core function is to create a stable and precisely controllable temperature environment for the chromatographic column, which plays a decisive role in improving the accuracy, repeatability, and efficiency of chromatographic analysis.

[0003] Accurate temperature control can optimize the column efficiency of the chromatographic column, enhance the resolution of chromatographic peaks, shorten the analysis time, reduce the system backpressure, thereby ensuring the reliability of the analysis results. Existing chromatographic column ovens usually come with a heat dissipation filter, but it is exposed to the outside for a long time and is extremely prone to dust accumulation. As the dust accumulates continuously, the heat dissipation filter gradually becomes blocked, resulting in a significant decline in the heat dissipation performance of the chromatographic column oven. This not only causes abnormal temperature regulation inside the oven, affecting the separation effect of the chromatographic column and the accuracy of the analysis results, but also may shorten the service life of the equipment due to overheating, increase the risk of equipment failure, and thus affect the continuity and stability of the entire chromatographic analysis work. Summary of the Invention

[0004] In view of this, the present invention provides a self-cleaning and anti-pollution chromatographic column oven, which can, through the setting of a self-cleaning structure, automatically and efficiently clean and dredge the heat dissipation filter blocked by dust accumulation, ensuring that the chromatographic column oven always maintains excellent heat dissipation performance. At the same time, it also brings many significant advantages. On the one hand, the stable heat dissipation performance ensures the precise regulation of the temperature inside the oven, significantly improving the separation effect of the chromatographic column and greatly enhancing the accuracy and repeatability of the analysis results. On the other hand, it avoids the problem of equipment overheating caused by poor heat dissipation, effectively extends the service life of the oven and key internal components, reduces the incidence of equipment failures, and reduces the downtime caused by equipment maintenance, effectively ensuring the efficient and continuous development of chromatographic analysis work. Through the setting of an adjustment and positioning structure, it can flexibly and precisely position and clamp according to the different thicknesses of the chromatographic columns, greatly improving the adaptability of the oven to various specifications of chromatographic columns. Scientific research and experimental personnel no longer need to frequently replace equipment to adapt to different thickness chromatographic columns, significantly expanding the scope of use of the oven; the precise positioning and clamping ensure the stable placement of the chromatographic column in the oven, avoiding the problem of uneven temperature caused by the shaking of the chromatographic column, effectively improving the accuracy of temperature control, and thus ensuring the accuracy and repeatability of chromatographic analysis results.

[0005] The present invention provides a self-cleaning and anti-pollution chromatographic column oven, which specifically includes: a column oven body and a self-cleaning structure; A fixed convex frame is fixedly connected to the rear side of the column temperature box body. A filter screen is installed inside the fixed convex frame, and a self-cleaning structure is arranged outside the filter screen. The self-cleaning structure includes: Connecting support plates, fixedly connected to the upper and lower ends of the fixed convex frame. Extension bumps are fixedly connected to both ends of the connecting support plates; Guide sliding rods, arranged between the extension bumps. A lead screw is arranged on the other side of the extension bumps. One end of the top of the lead screw penetrates through the extension bump and is fixedly connected to the driving end of the top first motor; Moving vertical plates, arranged between two groups of connecting support plates. Connecting sliding rings are fixedly connected to both ends of the moving vertical plates. First screw holes and guide holes are respectively formed in the connecting sliding rings. The first screw holes are rotationally engaged with the lead screw, and the guide holes are fitted and slidably installed on the outer sides of the guide sliding rods. Two groups of connecting brackets are fixedly connected to the inner sides of the moving vertical plates; Cleaning brush rollers, arranged between the connecting brackets, and the cleaning brush rollers are closely attached to the filter screen; Fixed concave frames, fixedly connected to the inside of the column temperature box body. A bearing support plate is fixedly connected to the middle of one side of the column temperature box body. An installation support frame is fixedly installed on the bearing support plate. Three groups of fan sets are fixedly installed inside the installation support frame.

[0006] In at least some embodiments, an adjustment and positioning structure is arranged on the fixed concave frame. The adjustment and positioning structure includes a connecting belt shaft, a bidirectional lead screw, a connecting cylinder, and a driven sprocket. The upper and lower ends of the fixed concave frame are rotatably installed with the connecting belt shaft. Three groups of bidirectional lead screws are arranged at the inner ends of the connecting belt shaft, and the bidirectional lead screws are fixedly connected through the connecting cylinder. At the same time, one end of the connecting belt shaft penetrates through the column temperature box body and is fixedly connected to the driven sprocket outside.

[0007] In at least some embodiments, a second motor is fixedly installed in the middle of the inner side of the fixed concave frame. The driving end of the second motor is fixedly connected to a driving shaft column, and a driving sprocket is fixedly connected to the outer side of the driving shaft column.

[0008] In at least some embodiments, a chain is engaged with the outer sides of the driving sprocket and the driven sprocket.

[0009] In at least some embodiments, a moving belt plate is arranged on the outer side of the bidirectional lead screw. A second screw hole is formed in the moving belt plate. One end of the moving belt plate is fixedly connected to an extension support plate. A moving chute is formed in the fixed concave frame. The extension support plate passes through the moving chute and is fixedly connected to a clamping plate.

[0010] In at least some embodiments, a door is hinged to the front end of the column temperature box body, and a locking mechanism is provided between the column temperature box body and the door. The locking mechanism includes a right-angle carrier plate, a fixed support cylinder, a first spring, a push plate, a through hole, a connecting cross plate, and a moving top block. One side of the door is fixedly connected to the right-angle carrier plate, and the fixed support cylinder is fixedly connected to the right-angle carrier plate. A first spring is arranged outside the fixed support cylinder, and one end of the first spring is fixedly connected to the right-angle carrier plate. A push plate is arranged behind the right-angle carrier plate. A through hole is formed in the middle of the push plate, and a moving top block is fixedly connected to the inner end of the push plate through a connecting cross plate.

[0011] In at least some embodiments, a fixed support frame is fixedly connected to the side surface of the column temperature box body. A square groove is formed in the middle of the fixed support frame. A connecting vertical rod is fixedly connected between the two sides of the fixed support frame of the square groove. A second spring is arranged outside the connecting vertical rod.

[0012] In at least some embodiments, a limiting wedge block is arranged at the square groove. Sliding ear plates are fixedly connected to both sides of the limiting wedge block. The sliding ear plates are slidably mounted outside the connecting vertical rod through movable sliding holes. A connecting rod is fixedly connected to the middle of the limiting wedge block. One end of the connecting rod penetrates through the fixed support frame and is fixedly connected to a pull handle.

[0013] The self-cleaning and anti-pollution chromatographic column temperature box provided by the present invention has the following beneficial effects By setting a positioning and switching structure, the present invention drives the screw rod to rotate by starting the first motor. The screw rod rotates and meshes with the first screw hole on the connecting sliding ring on one side. However, the guiding hole of the connecting sliding ring on the other side is limited and guided on the guiding sliding rod, so that the screw rod drives the connecting sliding ring to move. The connecting sliding ring drives the connecting bracket to move through the moving vertical plate, and the connecting bracket drives the cleaning brush to reciprocate on the filter screen, thereby cleaning and dredging the filter screen. Then, by starting the fan group, the dredged dust can be prevented from entering the interior of the column temperature box body, thereby completing the self-cleaning of the filter screen. It does not require manual dredging and cleaning, ensuring that the chromatographic column temperature box always maintains excellent heat dissipation performance. At the same time, it can also bring many remarkable advantages. On the one hand, the stable heat dissipation performance ensures the accurate control of the temperature inside the temperature box, significantly improving the separation effect of the chromatographic column and greatly improving the accuracy and repeatability of the analysis results. On the other hand, it avoids the problem of overheating of the equipment caused by poor heat dissipation, effectively extends the service life of the temperature box and the key components inside, reduces the failure rate of the equipment, reduces the downtime caused by equipment maintenance, and effectively guarantees the efficient and continuous development of chromatographic analysis work.

[0014] The present invention is provided with an adjustment and positioning structure. By starting the second motor to drive the drive shaft column to rotate, the drive shaft column drives the drive sprocket to rotate. The drive sprocket meshes with the chain to rotate, and the chain drives the driven sprocket to rotate. The driven sprocket drives the connecting belt shaft to rotate, and the connecting belt shaft drives the bidirectional lead screw to rotate. The bidirectional lead screw rotates and meshes with the second screw hole on the moving belt plate. Under the limiting action of the extension support plate and the moving chute, the bidirectional lead screw drives the moving belt plate to move towards each other. Thus, the moving belt plate drives the clamping plate to clamp and fix chromatographic columns of different thicknesses, and can flexibly and accurately perform positioning and clamping operations according to the different thicknesses of the chromatographic columns, greatly improving the adaptability of the column oven to various specifications of chromatographic columns. Scientific research and experimental personnel no longer need to frequently replace equipment to adapt to different thickness chromatographic columns, significantly expanding the use range of the column oven; the precise positioning and clamping ensure the stable placement of the chromatographic column in the column oven, avoiding the problem of uneven temperature caused by the shaking of the chromatographic column, effectively improving the accuracy of temperature control, and further ensuring the accuracy and repeatability of chromatographic analysis results.

[0015] By setting a locking mechanism, it enables users to easily and conveniently lock and unlock the box door. In terms of safety, the stable locking function can effectively prevent the box door from accidentally opening, avoiding external impurities, dust and other pollutants from entering the interior of the column oven, ensuring a stable internal environment, protecting the chromatographic column and related components from contamination, and further maintaining the accuracy of the analysis results; from the perspective of operation convenience, the convenient opening and locking methods greatly save the operation time of experimental personnel, especially in the experimental scenarios of frequently accessing and storing chromatographic columns, improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly introduced below.

[0017] The following drawings in the description only relate to some embodiments of the present invention and do not limit the present invention.

[0018] In the drawings: Figure 1 The overall structural schematic diagram according to the present invention is shown; Figure 2 The filter structure schematic diagram according to the present invention is shown; Figure 3 The self-cleaning structure schematic diagram according to the present invention is shown; Figure 4 The partial component structure schematic diagram in the self-cleaning structure according to the present invention is shown; Figure 5 The adjustment and positioning structure schematic diagram according to the present invention is shown; Figure 6 The partial component structure schematic diagram of the adjustment and positioning structure according to the present invention is shown; Figure 7 Shows a schematic diagram of the locking mechanism according to the present invention; Figure 8 Shows a schematic diagram of the structure of the box door and some components in the locking mechanism according to the present invention; Figure 9 Shows a schematic diagram of the structure of the column temperature box body and some components in the locking mechanism according to the present invention; List of reference numerals 1. Column temperature box body; 101. Fixed convex frame; 1011. Filter screen; 2. Self-cleaning structure; 201. Connecting support plate; 2011. Extension bump; 202. Guide sliding rod; 2021. Lead screw; 2022. First motor; 203. Moving vertical plate; 2031. Connecting sliding ring; 2032. First screw hole; 2033. Guide hole; 2034. Connecting bracket; 204. Cleaning brush roller; 205. Fixed concave frame; 2051. Bearing support plate; 2052. Installation support frame; 206. Fan group; 3. Adjusting and positioning structure; 301. Connecting belt shaft; 3011. Bidirectional lead screw; 3012. Connecting cylinder; 3013. Driven sprocket; 302. Second motor; 3021. Driving shaft column; 3022. Driving sprocket; 303. Chain; 304. Moving belt plate; 3041. Second screw hole; 3042. Extension support plate; 3043. Moving chute; 3044. Clamping plate; 4. Locking mechanism; 401. Box door; 4011. Right-angle carrier plate; 4012. Fixed support cylinder; 4013. First spring; 402. Pushing plate; 4021. Through hole; 4022. Connecting cross plate; 4023. Moving top block; 403. Fixed support frame; 4031. Connecting vertical rod; 4032. Second spring; 4033. Square groove; 404. Limiting wedge block; 4041. Sliding ear plate; 4042. Movable sliding hole; 4043. Connecting rod; 4044. Pull handle.

[0019] Example: Please refer to Figures 1 to 9 : The present invention provides a self-cleaning and anti-pollution column temperature box for chromatographic columns, comprising: a column temperature box body 1 and a self-cleaning structure 2; A fixed convex frame 101 is fixedly connected to the rear side of the column temperature box body 1. A filter screen 1011 is installed inside the fixed convex frame 101. A self-cleaning structure 2 is provided outside the filter screen 1011. The self-cleaning structure 2 includes: Connecting support plates 201, fixedly connected to the upper and lower ends of the fixed convex frame 101. Extension bumps 2011 are fixedly connected to both ends of the connecting support plates 201; Guide sliding rods 202 are arranged between the extension bumps 2011. A lead screw 2021 is provided on the other side of the extension bumps 2011. The top end of the lead screw 2021 penetrates through the extension bumps 2011 and is fixedly connected to the driving end of the top first motor 2022; Moving vertical plates 203 are arranged between the two groups of connecting support plates 201. Connecting sliding rings 2031 are fixedly connected to both ends of the moving vertical plates 203. First screw holes 2032 and guide holes 2033 are respectively formed in the connecting sliding rings 2031. The first screw holes 2032 are rotationally engaged with the lead screw 2021, and the guide holes 2033 are fitted and slidably installed on the outer sides of the guide sliding rods 202. Two groups of connecting brackets 2034 are fixedly connected to the inner sides of the moving vertical plates 203; Cleaning brush rollers 204 are arranged between the connecting brackets 2034, and the cleaning brush rollers 204 are closely attached to the filter screen 1011; Fixed concave frames 205 are fixedly connected to the inside of the column temperature box body 1. A bearing support plate 2051 is fixedly connected to the middle of one side of the column temperature box body 1. An installation support frame 2052 is fixedly installed on the bearing support plate 2051. Three groups of fan sets 206 are fixedly installed inside the installation support frame 2052.

[0020] By starting the first motor 2022 to drive the rotation of the lead screw 2021, the lead screw 2021 is rotationally engaged with the first screw hole 2032 on one side of the connecting sliding ring 2031. However, the guide hole 2033 of the other side of the connecting sliding ring 2031 is limited and guided on the guide sliding rod 202, so that the lead screw 2021 drives the connecting sliding ring 2031 to move. The connecting sliding ring 2031 drives the connecting brackets 2034 to move through the moving vertical plate 203. The connecting brackets 2034 drive the cleaning brush rollers 204 to reciprocate on the filter screen 1011, thereby cleaning and dredging the filter screen 1011. Then, by starting the fan sets 206, it is possible to prevent the dredged dust from entering the inside of the column temperature box body 1, thereby completing the self-cleaning of the filter screen 1011.

[0021] Embodiment 2: On the basis of Embodiment 1, such as Figure 5 and Figure 6As shown in the figure, an adjustment and positioning structure 3 is provided on the fixed concave frame 205. The adjustment and positioning structure 3 includes a connecting belt shaft 301, a bidirectional lead screw 3011, a connecting cylinder 3012, and a driven sprocket 3013. The upper and lower ends of the fixed concave frame 205 are rotatably installed with the connecting belt shaft 301. Three groups of bidirectional lead screws 3011 are provided at the inner end of the connecting belt shaft 301, and the bidirectional lead screws 3011 are fixedly connected to each other through the connecting cylinder 3012. At the same time, one end of the connecting belt shaft 301 penetrates through the column temperature box body 1 and is fixedly connected to the driven sprocket 3013 on the outside.

[0022] A second motor 302 is fixedly installed at the middle of the inner side of the fixed concave frame 205. The driving end of the second motor 302 is fixedly connected with a driving shaft column 3021, and a driving sprocket 3022 is fixedly connected to the outside of the driving shaft column 3021.

[0023] A chain 303 is meshed with the outside of the driving sprocket 3022 and the outside of the driven sprocket 3013.

[0024] A moving belt plate 304 is provided on the outside of the bidirectional lead screw 3011. A second screw hole 3041 is opened on the moving belt plate 304. One end of the moving belt plate 304 is fixedly connected with an extending support plate 3042. A moving sliding groove 3043 is opened on the fixed concave frame 205. The extending support plate 3042 passes through the moving sliding groove 3043 and is fixedly connected with a clamping plate 3044.

[0025] By starting the second motor 302 to drive the driving shaft column 3021 to rotate, the driving shaft column 3021 drives the driving sprocket 3022 to rotate. The driving sprocket 3022 meshes with the chain 303 to rotate. The chain 303 drives the driven sprocket 3013 to rotate. The driven sprocket 3013 drives the connecting belt shaft 301 to rotate. The connecting belt shaft 301 drives the bidirectional lead screw 3011 to rotate. The bidirectional lead screw 3011 rotates and meshes with the second screw hole 3041 on the moving belt plate 304. Under the limiting action of the extending support plate 3042 and the moving sliding groove 3043, the bidirectional lead screw 3011 drives the moving belt plate 304 to move towards each other. Thus, the moving belt plate 304 drives the clamping plate 3044 to clamp and fix chromatographic columns with different thicknesses.

[0026] Embodiment 3: On the basis of Embodiment 1 and Embodiment 2, where Figures 7 to 9A front end of the shown column temperature box body 1 is hinged with a box door 401, and a locking mechanism 4 is arranged between the column temperature box body 1 and the box door 401. The locking mechanism 4 includes a right-angle carrier plate 4011, a fixed support cylinder 4012, a first spring 4013, a pushing plate 402, a through hole 4021, a connecting cross plate 4022 and a moving top block 4023. One side of the box door 401 is fixedly connected with the right-angle carrier plate 4011. The right-angle carrier plate 4011 is fixedly connected with the fixed support cylinder 4012. A first spring 4013 is arranged outside the fixed support cylinder 4012. One end of the first spring 4013 is fixedly connected with the right-angle carrier plate 4011. A pushing plate 402 is arranged at the rear side of the right-angle carrier plate 4011. A through hole 4021 is formed in the middle of the pushing plate 402. And an inner end of the pushing plate 402 is fixedly connected with the moving top block 4023 through the connecting cross plate 4022.

[0027] A side surface of the column temperature box body 1 is fixedly connected with a fixed support frame 403. A square groove 4033 is formed in the middle of the fixed support frame 403. A connecting vertical rod 4031 is fixedly connected between two sides of the fixed support frame 403 where the square groove 4033 is located. A second spring 4032 is arranged outside the connecting vertical rod 4031.

[0028] A limiting wedge block 404 is arranged at the square groove 4033. Two sides of the limiting wedge block 404 are fixedly connected with sliding ear plates 4041. The sliding ear plates 4041 are slidably mounted outside the connecting vertical rod 4031 through movable sliding holes 4042. A connecting rod 4043 is fixedly connected to the middle of the limiting wedge block 404. One end of the connecting rod 4043 penetrates through the fixed support frame 403 and is fixedly connected with a pull handle 4044.

[0029] By closely fitting the box door 401 with the column temperature box body 1, then pushing the pushing plate 402 to drive the moving top block 4023 to move through the connecting cross plate 4022. Under the setting of the inclined surface, the moving top block 4023 jacks up the limiting wedge block 404. The limiting wedge block 404 squeezes the second spring 4032 on the connecting vertical rod 4031 through the sliding ear plates 4041. When pushed to a certain position, the moving top block 4023 cannot jack up the limiting wedge block 404, so that the second spring 4032 loses extrusion. Thus, under the reaction force, the sliding ear plates 4041 are driven to move. The sliding ear plates 4041 drive the limiting wedge block 404 to limit the moving top block 4023, thereby completing the locking. When opening, only need to pull the pull handle 4044 to drive the limiting wedge block 404 to move through the connecting rod 4043 to release the limit on the moving top block 4023. Because the pushing plate 402 squeezes the first spring 4013 on the fixed support cylinder 4012 when moving. After the limit is released, the first spring 4013 loses pressure. Thus, the elastic force is released to drive the pushing plate 402 to move back to its original position, thereby completing the opening of the box door 401.

[0030] Specific usage and function of this embodiment: In the present invention, by starting the first motor 2022 to drive the lead screw 2021 to rotate, the lead screw 2021 is rotationally engaged with the first screw hole 2032 on the connecting slip ring 2031 on one side. However, the guiding hole 2033 of the connecting slip ring 2031 on the other side is limited and guided on the guiding slide rod 202, so that the lead screw 2021 drives the connecting slip ring 2031 to move. The connecting slip ring 2031 drives the connecting bracket 2034 to move through the moving vertical plate 203, and the connecting bracket 2034 drives the cleaning brush 204 to reciprocate on the filter screen 1011, thereby cleaning and dredging the filter screen 1011. Then, by starting the fan group 206, it is possible to prevent the dredged dust from entering the interior of the column temperature box body 1, thus completing the self-cleaning of the filter screen 1011, ensuring that the column temperature box of the chromatographic column always maintains excellent heat dissipation performance, and at the same time bringing many significant advantages. On the one hand, the stable heat dissipation performance ensures the precise control of the temperature inside the column temperature box, significantly improving the separation effect of the chromatographic column and greatly enhancing the accuracy and repeatability of the analysis results. On the other hand, it avoids the problem of overheating of the equipment caused by poor heat dissipation, effectively extends the service life of the column temperature box and the key components inside, reduces the equipment failure rate, and reduces the downtime caused by equipment maintenance, strongly guaranteeing the efficient and continuous development of chromatographic analysis work. When placing the chromatographic column into the column temperature box body 1, by pulling the pull handle 4044, the limiting wedge block 404 is driven to move through the connecting rod 4043 to release the limit on the moving top block 4023. Because the pushing plate 402 squeezes the first spring 4013 on the fixed support cylinder 4012 when moving, after the limit is released, the first spring 4013 loses pressure, thereby releasing the elasticity to push the pushing plate 402 to move back to its original position, thus completing the opening of the box door 401. Then, by starting the second motor 302 to drive the drive shaft column 3021 to rotate, the drive shaft column 3021 drives the drive sprocket 3022 to rotate, the drive sprocket 3022 meshes with the chain 303 to rotate, the chain 303 drives the driven sprocket 3013 to rotate, the driven sprocket 3013 drives the connecting belt shaft 301 to rotate, the connecting belt shaft 301 drives the bidirectional lead screw 3011 to rotate, the bidirectional lead screw 3011 is rotationally engaged with the second screw hole 3041 on the moving belt plate 304, and under the limiting action of the extending support plate 3042 and the moving chute 3043, the bidirectional lead screw 3011 drives the moving belt plate 304 to move towards each other, so that the moving belt plate 304 drives the clamping plate 3044 to clamp and fix chromatographic columns of different thicknesses, and can flexibly and precisely perform positioning and clamping operations according to the different thicknesses of the chromatographic columns, greatly improving the adaptability of the column temperature box to various specifications of chromatographic columns. Scientific research and experimental personnel no longer need to frequently replace equipment to adapt to different thickness chromatographic columns, significantly expanding the scope of use of the column temperature box; the precise positioning and clamping ensure the stable placement of the chromatographic column in the column temperature box, avoiding the problem of uneven temperature caused by the shaking of the chromatographic column, effectively improving the precision of temperature control, and further ensuring the accuracy and repeatability of chromatographic analysis results.

Claims

1. A self-cleaning and anti-pollution chromatographic column oven, comprising: Column temperature box (1) and self-cleaning structure (2); A fixed convex frame (101) is fixedly connected to the rear side of the column temperature box (1), a filter screen (1011) is installed inside the fixed convex frame (101), and a self-cleaning structure (2) is provided on the outside of the filter screen (1011), characterized in that the self-cleaning structure (2) comprises: A connecting support plate (201) is fixedly connected to the upper and lower ends of the fixed convex frame (101), and the two ends of the connecting support plate (201) are fixedly connected with extension convex blocks (211); The guide slide bar (202) is arranged between the extension protrusions (2011), a screw rod (221) is arranged on the other side of the extension protrusion (2011), and a top end of the screw rod (2021) penetrates the extension protrusion (2011) and is fixedly connected to a driving end of a top first motor (222); The movable vertical plate (203) is arranged between the two groups of connecting support plates (201), and the two ends of the movable vertical plate (203) are fixedly connected with connecting slip rings (2031), and the connecting slip rings (2031) are respectively provided with a first screw hole (2032) and a guide hole (2033), the first screw hole (2032) is rotatably engaged with the screw rod (221), and the guide hole (2033) is slidably mounted on the outer side of the guide slide rod (202), and the inner side of the movable vertical plate (203) is fixedly connected with two groups of connecting brackets (2034); A cleaning roller brush (204) is disposed between the connecting brackets (2034), and the cleaning roller brush (204) is closely attached to the filter screen (1011); The fixed recessed frame (205) is fixedly connected to the interior of the column temperature box (1); a bearing support plate (2051) is fixedly connected to the middle of one side of the column temperature box (1); a mounting support frame (2052) is fixedly installed on the bearing support plate (2051); and three sets of fan groups (206) are fixedly installed inside the mounting support frame (2052).

2. The self-cleaning and anti-pollution chromatographic column oven according to claim 1, characterized in that: The fixed recessed frame (205) is provided with an adjustment and positioning structure (3), which comprises a connecting belt shaft (301), a bidirectional screw rod (3011), a connecting tube (3012) and a driven sprocket (3013). The connecting belt shaft (301) is rotatably mounted at the upper and lower ends of the fixed recessed frame (205), three groups of bidirectional screw rods (3011) are provided at one inner end of the connecting belt shaft (301), and the bidirectional screw rods (3011) are fixedly connected to each other via the connecting tube (3012), and one end of the connecting belt shaft (301) passes through the column temperature box body (1) and is fixedly connected to the driven sprocket (3013) on the outside.

3. The self-cleaning and anti-pollution chromatographic column oven according to claim 1, characterized in that: A second motor (302) is fixedly mounted in the middle of the inner side of the fixed recess (205); a driving shaft column (3021) is fixedly connected to the driving end of the second motor (302); and a driving sprocket (3022) is fixedly connected to the outer side of the driving shaft column (3021).

4. The self-cleaning and anti-pollution chromatographic column oven according to claim 3, characterized in that: The outer side of the driving sprocket (3022) and the outer side of the driven sprocket (3013) are meshed with a chain (303).

5. The self-cleaning and anti-pollution chromatographic column oven according to claim 2, characterized in that: A movable belt plate (304) is provided on the outer side of the bidirectional screw rod (3011), a second screw hole (3041) is provided on the movable belt plate (304), one end of the movable belt plate (304) is fixedly connected to an extension support plate (3042), a movable slide groove (3043) is provided on the fixed recessed frame (205), and the extension support plate (3042) passes through the movable slide groove (3043) and is fixedly connected to the clamping plate (3044).

6. The self-cleaning and anti-pollution chromatographic column oven according to claim 1, characterized in that: The front end of the column temperature box (1) is hinged with a box door (401), and a locking mechanism (4) is provided between the column temperature box (1) and the box door (401). The locking mechanism (4) comprises a right-angle carrier plate (4011), a fixed support tube (4012), a first spring (4013), a push plate (402), a through hole (4021), a connecting cross plate (4022) and a movable top block (4023). One side of the box door (401) is fixedly connected to the right-angle carrier plate (4011). The right-angle carrier plate (4012) is fixedly connected to the box door (4011). 11) is fixedly connected to a fixed support tube (4012), a first spring (4013) is provided on the outer side of the fixed support tube (4012), one end of the first spring (4013) is fixedly connected to the right-angle carrier plate (4011), a push plate (402) is provided on the rear side of the right-angle carrier plate (4011), a through hole (4021) is opened in the middle of the push plate (402), and one end of the inner side of the push plate (402) is fixedly connected to a movable top block (4023) via a connecting cross plate (4022).

7. The self-cleaning and anti-pollution chromatographic column oven according to claim 1, characterized in that: A fixed support frame (403) is fixedly connected to the side of the column temperature box (1); a square groove (4033) is provided in the middle of the fixed support frame (403); a connecting vertical rod (4031) is fixedly connected between the fixed support frames (403) on both sides of the square groove (4033); and a second spring (4032) is provided on the outer side of the connecting vertical rod (4031).

8. The self-cleaning and anti-pollution chromatographic column oven according to claim 7, characterized in that: A limiting wedge block (404) is provided at the square groove (4033), and sliding ear plates (4041) are fixedly connected to both sides of the limiting wedge block (404), and the sliding ear plates (4041) are slidably installed on the outer side of the connecting vertical rod (4031) through movable sliding holes (4042). A connecting rod (4043) is fixedly connected to the middle of the limiting wedge block (404), and one end of the connecting rod (4043) passes through the fixed support frame (403) and is fixedly connected to the pull handle (4044).

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