Low molecule removing device

By employing a design in which the inner groove of the tube sheet in the de-molecularizer is matched with the filter screen, combined with the use of locking blocks and bolts, a stepped hole liquid storage tank structure, and a sliding mechanism, the problem of material solidification and blockage is solved, achieving efficient filtration and convenient maintenance, and improving the operating efficiency and maintenance effectiveness of the equipment.

CN224126771UActive Publication Date: 2026-04-17SHANGHAI TONGHUA STAINLESS STEEL PRESSURE VESSEL ENG
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
SHANGHAI TONGHUA STAINLESS STEEL PRESSURE VESSEL ENG
Filing Date
2025-04-29
Publication Date
2026-04-17

AI Technical Summary

Technical Problem

In traditional de-molecular de-capillary ...

Method used

A molecular depletion device was designed, which uses a groove on the inner side of a perforated plate to cooperate with a filter screen. The filter screen is fixed by a locking block and bolts. The stepped holes on the inner side of the perforated plate form a liquid storage pool. Combined with a sliding structure installation mechanism, the stability of the filter screen and convenient maintenance are ensured.

Benefits of technology

It effectively intercepts silicone oil impurities, improves the efficiency of de-molecularization, simplifies maintenance procedures, shortens downtime, and ensures the continuous and efficient operation of equipment.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of silicification, and discloses a low molecule removing device which comprises a stripping box, the top of the stripping box is rotatably connected with a top plate, the top of the top plate is communicated with a feeding port, the bottom of the stripping box is communicated with a discharging port, the middle of the inner side of the stripping box is fixedly connected with a pattern plate, the front side of the pattern plate is provided with a groove, and the groove is communicated with the discharging port. A groove is formed in the top of the base, a filter screen is slidably connected to the interior of the groove, a connecting plate is fixedly connected to the front side of the filter screen, an inserting groove is formed in the top of the connecting plate, a clamping block is slidably connected to the interior of the inserting groove, and two bolts are in threaded connection to the bottom of the front side of the clamping block. According to the utility model, when a material flows through the pattern plate, the filter screen effectively intercepts silicon oil impurities, a stable fixing structure is formed by the clamping block, the insertion groove and the bolt, solidification of the material is delayed by the liquid storage tank formed by the large holes in the stepped holes, and the material in the small holes at the lower part flows to drive the whole to move, so that the low molecule removal efficiency is improved.
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Description

Technical Field

[0001] This utility model relates to the field of siliconization technology, and in particular to a de-lowering molecular device. Background Technology

[0002] A low molecular weight remover is a device used to separate low molecular weight components from polymer systems. It is used to remove low molecular weight components from silicone oil or other silicon-based materials to improve product quality and performance. Traditional low molecular weight removers consume a lot of energy. Therefore, we need to develop energy-saving products to reduce production costs and environmental pollution.

[0003] A search revealed Chinese patent publication number CN214937147U, which discloses a low-molecular-weight removal device, comprising: a vessel body, including a vessel wall and a cavity enclosed by the vessel wall; a feed pipe installed at the top of the vessel body; a discharge pipe installed at the bottom of the vessel body; a perforated plate, dividing the cavity into at least two interconnected parts distributed vertically; a vacuum tube installed on the side wall of the vessel body below the perforated plate; and a steam pipe installed on the side wall of the vessel body above the perforated plate. The steam allows residual material above the perforated plate to flow down smoothly and promptly through the through holes of the perforated plate, thereby reducing the possibility of continuous accumulation, denaturation, and shedding of residues that could affect product quality, and also reducing the frequency of shutdown and disassembly. Water molecules in the steam enter the vacuum tube along with other low-molecular-weight molecules and do not affect product quality. However, in actual use, material solidification occurs at the holes above the perforated plate, causing blockage and reducing the efficiency of low-molecular-weight removal. Utility Model Content

[0004] To overcome the above deficiencies, this utility model provides a de-molecularization device, which aims to improve the problem of material solidification causing blockage at the holes above the tube sheet, resulting in reduced working efficiency.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a de-molecular device, comprising a de-molding chamber, a top plate rotatably connected to the top of the de-molding chamber, an inlet connected to the top of the top plate, an outlet connected to the bottom of the de-molding chamber, a perforated plate fixedly connected to the inner middle of the de-molding chamber, a groove formed on the front side of the perforated plate, a filter screen slidably connected inside the groove, a connecting plate fixedly connected to the front side of the filter screen, an insertion groove formed on the top of the connecting plate, a locking block slidably connected inside the insertion groove, two bolts threadedly connected to the bottom front side of the locking block, the rear ends of the two bolts passing through the locking block and threadedly connected to the front side of the perforated plate, multiple stepped holes formed on the top inner side of the perforated plate, two hinges fixedly connected to the left end of the middle front side of the de-molding chamber, the same baffle fixedly connected to the right rear end of the two hinges, and mounting mechanisms provided on both the left and right sides of the perforated plate.

[0006] Through the above technical solution: the material enters the tube sheet through the feed inlet on the top plate, flows downwards under gravity, and is discharged from the bottom outlet after processing, completing the material input and output cycle. The tube sheet inside the tube sheet has a groove on its front side, into which a filter screen can be inserted. When the material flows through the tube sheet, the filter screen intercepts impurities in the silicone oil, preventing them from entering subsequent processing stages and ensuring the purity of the discharged material. To ensure the stability of the filter screen during operation, it is first inserted into the groove, then a locking block is slid into the insertion slot for initial fixation, and finally, the locking block is fixed to the front side of the tube sheet by tightening the bolts. To prevent the filter screen from shifting or loosening during filtration, the stepped holes on the top inner side of the tube sheet, with large and small holes arranged in a specific configuration, form a liquid storage pool. This delays material solidification, while the smaller holes at the bottom facilitate material flow, promoting full contact between the material and low-molecular-weight substances, enhancing mass transfer, and improving the efficiency of low-molecular-weight removal. The baffle on the front side of the tube sheet is connected by a hinge. When cleaning the filter screen and tube sheet is required, opening the baffle allows direct access to the internal components, facilitating easy disassembly and installation, reducing equipment maintenance time, and ensuring continuous and efficient operation of the low-molecular-weight removal process.

[0007] As a further description of the above technical solution:

[0008] The installation mechanism includes two slide bars, which are fixedly connected to the left and right sides of the tube sheet. The left and right sides of the inside of the tube sheet are fixedly connected to a fixing frame. The two fixing frames are provided with a sliding groove between each other. The front side of the two sliding grooves is fixedly connected to the same horizontal plate. The four corners of the front side of the horizontal plate are threaded with screws.

[0009] The above technical solution involves a sliding structure formed by the slide bar and the slide groove of the inner fixing frame of the unloading box. This allows the tube sheet to remain stable during operation and to be smoothly pulled out along the track during maintenance. When cleaning or repairing, the fixing screws are unscrewed to release the limit, and the tube sheet can be easily pulled out. This greatly simplifies the maintenance process, shortens downtime, and improves equipment maintenance efficiency and performance.

[0010] As a further description of the above technical solution:

[0011] Two snap fasteners are fixedly connected to the top front side of the unpacking box, and two pipe clamps are fixedly connected to the front side of the top plate.

[0012] The above technical solution involves two snap fasteners on the top front side of the unpacking unit, which, together with two pipe clamps on the front side of the top plate, can securely cover the top plate and ensure that materials do not leak during the feeding process.

[0013] As a further description of the above technical solution:

[0014] A handle is fixedly connected to the front right end of the baffle, and multiple semi-circular grooves are opened inside the front side of the handle.

[0015] The above technical solution involves a handle on the right side of the front of the baffle with multiple semi-circular grooves designed to fit the curvature of the fingers, making it easy to open the baffle.

[0016] As a further description of the above technical solution:

[0017] The top of the unpacking unit has multiple sealing grooves, and the bottom of the top plate is fixedly connected with multiple sealing pipes.

[0018] The above technical solution involves multiple sealing grooves on the top of the degassing box that fit into the sealing pipe fixed at the bottom of the top plate, effectively enhancing the overall sealing of the equipment, preventing external impurities from entering and internal materials from evaporating, and ensuring the high efficiency and safety of the degassing operation.

[0019] As a further description of the above technical solution:

[0020] Both bolts have washers fixedly connected to the middle of their outer walls, and both washers have a smooth design.

[0021] The above technical solution uses smooth washers in the middle of the outer walls of the two bolts to effectively prevent the bolts from being tightened and to avoid damage to the parts during disassembly.

[0022] As a further description of the above technical solution:

[0023] A fixing block is fixedly connected to the top of the card block, and a pull ring is fixedly connected to the top of the fixing block.

[0024] The above technical solution involves connecting the fixing block at the top of the card block to the pull ring, which facilitates the operator to pull the card block and achieve quick installation and removal of the filter screen.

[0025] As a further description of the above technical solution:

[0026] The outer diameter of the filter screen is smaller than the inner diameter of the groove, and the outer diameter of the card block is smaller than the inner diameter of the insertion slot.

[0027] The above technical solution, which uses a design where the outer diameter of the filter screen is smaller than the inner diameter of the groove and the outer diameter of the clip is smaller than the inner diameter of the insertion slot, ensures that the filter screen and the clip can be smoothly inserted into the corresponding structure, making the entire installation and maintenance process more convenient and efficient.

[0028] This utility model has the following beneficial effects:

[0029] 1. In this utility model, when the material flows through the tube sheet, the precise fit of the filter screen groove effectively intercepts silicone oil impurities. To ensure stability, a stable fixing structure is formed by the locking block, insertion groove and bolts. The liquid storage pool formed by the large holes in the stepped holes at the top of the inner side of the tube sheet delays the solidification of the material. The material flow in the small holes at the bottom drives the overall movement, enhances the contact between the material and low molecular weight substances, improves the efficiency of removing low molecular weight substances, and ensures the treatment effect.

[0030] 2. In this utility model, the slide bar and the slide groove of the inner fixing frame of the box form a sliding structure, which makes the tube sheet stable during operation and can be smoothly pulled out along the track during maintenance. When cleaning and maintenance, the fixing screws are unscrewed to release the limit, and the tube sheet can be easily pulled out, which greatly simplifies the maintenance process, shortens downtime, and improves the equipment maintenance efficiency and usage performance. Attached Figure Description

[0031] Figure 1 This is a perspective view of a de-molecular device proposed in this utility model;

[0032] Figure 2 This is an exploded view of a deboxing device for removing low-molecular-weight molecules proposed in this utility model;

[0033] Figure 3 This is a split view of a filter screen for a de-molecularizer proposed in this utility model;

[0034] Figure 4 This is a cross-sectional view of a perforated plate for removing low-molecular-weight molecules according to the present invention.

[0035] Figure 5 This is a split view of a slider for removing low molecular weight molecules according to this utility model.

[0036] Legend:

[0037] 1. Unpacking; 2. Installation mechanism; 201. Sliding bar; 202. Fixing frame; 203. Slide groove; 204. Horizontal plate; 205. Screw; 3. Top plate; 4. Inlet; 5. Outlet; 6. Perforated plate; 7. Groove; 8. Filter screen; 9. Connecting plate; 10. Insertion groove; 11. Locking block; 12. Bolt; 13. Step hole; 14. Hinge; 15. Baffle; 16. Clip fastener; 17. Pipe clamp; 18. Handle; 19. Semicircular groove; 20. Sealing groove; 21. Sealing pipe; 22. Gasket; 23. Fixing block; 24. Pull ring. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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.

[0039] Reference Figure 2 , Figure 3 and Figure 4 This utility model provides an embodiment of a low-molecular-weight removal device, comprising a removal box 1, a top plate 3 rotatably connected to the top of the removal box 1, a feed inlet 4 connected to the top of the top plate 3 for feeding, a discharge outlet 5 connected to the bottom of the removal box 1 for discharging, a perforated plate 6 fixedly connected to the inner middle of the removal box 1, a groove 7 formed on the front side of the perforated plate 6, a filter screen 8 slidably connected inside the groove 7, the filter screen 8 can be inserted into the groove 7 for filtering impurities inside the silicone oil, a connecting plate 9 fixedly connected to the front side of the filter screen 8, an insertion groove 10 formed on the top of the connecting plate 9, a locking block 11 slidably connected inside the insertion groove 10, inserting the filter screen 8 into the groove 7, and then inserting the locking block 11 into the insertion groove 10 to lock the filter screen 8 in place, the bottom of the front side of the locking block 11 is threaded. Two bolts 12 are connected, and the rear ends of the two bolts 12 pass through the locking block 11 and are threaded to the front side of the tube sheet 6. The locking block 11 is fixed to the front side of the tube sheet 6 by the bolts 12. Multiple stepped holes 13 are opened on the top inner side of the tube sheet 6. The diameter of the large hole is two to four times that of the small hole, and the height of the large hole is eight to twelve times that of the small hole. The volume of the large hole at the top is left large, thus forming a liquid storage pool. This can delay the solidification and the flow of material in the lower small hole will also agitate the overall liquid storage pool. Two hinges 14 are fixedly connected to the left end of the front middle of the unloading box 1. The same baffle 15 is fixedly connected to the right end of the rear side of the two hinges 14. When it is necessary to remove the filter screen 8 and the tube sheet 6, the baffle 15 is opened. The tube sheet 6 is provided with an installation mechanism 2 on both the left and right sides.

[0040] Specifically, the top of the decanter 1 is rotatably connected to the top plate 3. The feed inlet 4 on the top plate 3 facilitates material injection, while the discharge outlet 5 at the bottom is responsible for discharging the processed material. The tube sheet 6 in the middle of the inner side of the decanter 1 has a groove 7 on the front side that cooperates with the filter screen 8 to filter impurities. The filter screen 8 can be inserted into the groove 7 to effectively intercept various impurities in the silicone oil. To ensure the stability of the filter screen 8, during operation, first insert the filter screen 8 into the groove 7, then slide the locking block 11 into the insertion slot 10 for initial engagement, and finally tighten the two bolts 12 to fix the locking block 11 to the front side of the tube sheet 6, ensuring a stable and reliable filtration process. The top of the inner side of the tube sheet 6 begins to... There are stepped holes 13, and multiple stepped holes 13 are arranged with the large hole diameter being two to four times the small hole diameter and the large hole height being eight to twelve times the small hole height. The large hole at the top forms a liquid storage pool, which can not only delay the solidification of materials, but also drive the movement of materials in the liquid storage pool by the flow of materials in the small holes at the bottom, ensuring the fluidity of materials and the treatment effect. When it is necessary to maintain and clean the filter screen 8 and the tube sheet 6, the two hinges 14 and the baffle 15 at the left end of the middle of the front side of the decanter 1 play a role. Simply open the baffle 15 to easily access the internal components, which is convenient for disassembly and installation, greatly improving the maintenance convenience of the equipment and ensuring the efficient and continuous operation of the de-molecular removal work.

[0041] Reference Figure 5 The installation mechanism 2 includes two slide bars 201. The two slide bars 201 are fixedly connected to the left and right sides of the tube sheet 6. The left and right sides of the inside of the removal box 1 are fixedly connected to the fixing brackets 202. The two fixing brackets 202 are provided with sliding grooves 203 between each other. The slide bars 201 can slide back and forth inside the sliding grooves 203. The front side of the two sliding grooves 203 is fixedly connected to the same horizontal plate 204. The four corners of the front side of the horizontal plate 204 are threaded with screws 205. The horizontal plate 204 is fixed to the front side of the tube sheet 6 by the screws 205 to prevent the tube sheet 6 from sliding out and to facilitate the removal and maintenance of the tube sheet 6.

[0042] Specifically, the left and right sides of the tube sheet 6 are fixedly connected to two sliding bars 201 respectively. There is a fixed bracket 202 on each of the left and right sides inside the unloading box 1. The two fixed brackets 202 have a sliding groove 203 on the opposite side. The sliding bars 201 can slide back and forth in the sliding groove 203, so that the tube sheet 6 can move smoothly in the unloading box 1. The same horizontal plate 204 is installed on the front side of the two sliding grooves 203. The four corners of the front side of the horizontal plate 204 are threaded with screws 205 and fixed to the front side of the tube sheet 6 by the screws 205. The horizontal plate 204 plays the role of preventing the tube sheet 6 from sliding out of the sliding groove 203, ensuring the stability of the tube sheet 6 during the operation of the equipment. When the tube sheet 6 needs to be maintained, it can be easily taken out of the unloading box 1 by simply unscrewing the screws 205.

[0043] Reference Figure 1 and Figure 2Two snap fasteners 16 are fixedly connected to the top front side of the unloading box 1, and two pipe clamps 17 are fixedly connected to the front side of the top plate 3 for tightening the top plate 3. A handle 18 is fixedly connected to the right front side of the baffle 15 for easy opening of the baffle 15. Multiple semi-circular grooves 19 are provided inside the front side of the handle 18 to fit the fingers. Multiple sealing grooves 20 are provided on the top of the unloading box 1, and multiple sealing pipes 21 are fixedly connected to the bottom of the top plate 3 to increase its sealing performance.

[0044] Specifically, the two snap fasteners 16 on the top front side of the decanter 1 cooperate with the two pipe clamps 17 on the front side of the top plate 3 to securely cover the top plate 3, ensuring that the material does not leak during the feeding process. The handle 18 on the right front side of the baffle 15 has multiple semi-circular grooves 19 designed on its surface to fit the curvature of the fingers, making it easy to open the baffle 15. The multiple sealing grooves 20 opened on the top of the decanter 1 fit into the sealing pipes 21 fixed at the bottom of the top plate 3, effectively enhancing the overall sealing of the equipment, preventing external impurities from entering and internal materials from evaporating, and ensuring the high efficiency and safety of the de-molecular-weight removal operation.

[0045] Reference Figure 3 Two washers 22 are fixedly connected to the middle of the outer wall of the two bolts 12. Both washers 22 are designed to be rounded to prevent the bolts 12 from being tightened. A fixing block 23 is fixedly connected to the top of the locking block 11. A pull ring 24 is fixedly connected to the top of the fixing block 23 to facilitate pulling the locking block 11. The outer diameter of the filter screen 8 is smaller than the inner diameter of the groove 7, so the filter screen 8 can be inserted into the groove 7. The outer diameter of the locking block 11 is smaller than the inner diameter of the insertion groove 10.

[0046] Specifically, the smooth washer 22 in the middle of the outer wall of the two bolts 12 can effectively prevent the bolts 12 from being tightened and avoid damage to the parts during disassembly. The fixing block 23 on the top of the locking block 11 is connected to the pull ring 24, which makes it easy for the operator to pull the locking block 11 to realize the quick installation and disassembly of the filter screen 8. The design that the outer diameter of the filter screen 8 is smaller than the inner diameter of the groove 7 and the outer diameter of the locking block 11 is smaller than the inner diameter of the insertion groove 10 ensures that the filter screen 8 and the locking block 11 can be smoothly inserted into the corresponding structure, making the entire installation and maintenance process more convenient and efficient.

[0047] Working principle: The material enters the decanter 1 through the feed inlet 4 on the top plate 3, flows downward under gravity, and is discharged from the bottom outlet 5 after processing, completing the input and output cycle of the material. The front side of the tube sheet 6 inside the decanter 1 is provided with a groove 7, into which the filter screen 8 can be inserted. When the material flows through the tube sheet 6, the filter screen 8 intercepts impurities in the silicone oil, preventing them from entering the subsequent processing stage and ensuring the purity of the output. To ensure the stability of the filter screen 8 during operation, it is first inserted into the groove 7, then the locking block 11 is slid into the insertion slot 10 for initial fixation, and finally the locking block 11 is fixed to the tube sheet 6 by tightening the bolts 12. On the front side, to prevent the filter screen 8 from shifting or loosening during the filtration process, the stepped holes 13 on the top inner side of the tube sheet 6 have large and small holes arranged in a specific specification. The large holes form a liquid storage pool, which can delay the solidification of materials. When the material flows through the small holes at the bottom, it can drive the material in the liquid storage pool to move, promote the full contact between the material and low molecular weight substances, enhance the mass transfer effect, and improve the efficiency of removing low molecular weight substances. The baffle 15 on the front side of the decanter 1 is connected by a hinge 14. When it is necessary to clean the filter screen 8 and the tube sheet 6, the baffle 15 can be opened to directly access the internal components, easily complete the disassembly and installation, reduce equipment maintenance time, and ensure the continuous and efficient operation of the low molecular weight removal work.

[0048] Furthermore, the sliding strips 201 fixed on both sides of the tube sheet 6 and the sliding grooves 203 on the inner fixed frame 202 of the unloading box 1 form a sliding pair. The sliding strips 201 can move back and forth along the sliding grooves 203, so that the tube sheet 6 can be stably positioned during equipment operation. At the same time, it can be smoothly pulled out along the track when maintenance is required, avoiding damage to the parts caused by shaking during disassembly. The horizontal plate 204 spans across the front side of the sliding groove 203 and is tightly fixed to the front side of the tube sheet 6 by the screws 205 at the four corners. During operation, the horizontal plate 204 forms a limiting barrier to prevent the sliding strips 201 from coming out of the front end of the sliding groove 203, preventing displacement due to vibration or material impact, and ensuring the continuity and reliability of the de-molecularization operation. When it is necessary to inspect or clean the tube sheet 6, it is only necessary to unscrew the screws 205 to release the limiting constraint of the horizontal plate 204, and the tube sheet 6 can be completely pulled out along the sliding groove 203, simplifying the maintenance process, reducing downtime, and improving the maintainability and efficiency of the equipment.

[0049] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A low-molecular separator comprising a separation tank (1), characterized in that: The top of the unloading box (1) is rotatably connected to a top plate (3), the top of the top plate (3) is connected to a feed inlet (4), the bottom of the unloading box (1) is connected to a discharge outlet (5), a perforated plate (6) is fixedly connected to the middle of the inner side of the unloading box (1), a groove (7) is provided on the front side of the perforated plate (6), a filter screen (8) is slidably connected inside the groove (7), a connecting plate (9) is fixedly connected to the front side of the filter screen (8), an insertion slot (10) is provided on the top of the connecting plate (9), and the inside of the insertion slot (10) is... The sliding connection has a locking block (11), and the front bottom of the locking block (11) is threaded with two bolts (12). The rear ends of the two bolts (12) pass through the locking block (11) and are threaded to the front of the flower plate (6). The top inner side of the flower plate (6) has multiple stepped holes (13). The left end of the front middle of the unloading box (1) is fixedly connected with two hinges (14). The right rear end of the two hinges (14) is fixedly connected with the same baffle (15). The left and right sides of the flower plate (6) are provided with mounting mechanisms (2).

2. A low molecule remover according to claim 1, characterized in that: The installation mechanism (2) includes two slide bars (201). The two slide bars (201) are fixedly connected to the left and right sides of the flower plate (6). The left and right sides of the inside of the box (1) are fixedly connected to the fixing brackets (202). The two fixing brackets (202) are provided with a slide groove (203) between each other. The front side of the two slide grooves (203) is fixedly connected to the same horizontal plate (204). The four corners of the front side of the horizontal plate (204) are threaded with screws (205).

3. A low molecule remover according to claim 1, characterized by: Two snap fasteners (16) are fixedly connected to the top front side of the unpacking box (1), and two pipe clamps (17) are fixedly connected to the front side of the top plate (3).

4. A low molecule remover according to claim 1, characterized by: A handle (18) is fixedly connected to the front right end of the baffle (15), and a plurality of semi-circular grooves (19) are provided on the front side of the inside of the handle (18).

5. A low molecule remover according to claim 1, characterized by: The top of the unpacking box (1) is provided with multiple sealing grooves (20), and the bottom of the top plate (3) is fixedly connected with multiple sealing tubes (21).

6. A low molecule remover according to claim 1, characterized by: Both bolts (12) have washers (22) fixedly connected to the middle of their outer walls, and both washers (22) have a smooth design.

7. A low molecule remover according to claim 1, characterized by: The top of the card block (11) is fixedly connected to a fixing block (23), and the top of the fixing block (23) is fixedly connected to a pull ring (24).

8. A low molecule remover according to claim 1, characterized by: The outer diameter of the filter screen (8) is smaller than the inner diameter of the groove (7), and the outer diameter of the card block (11) is smaller than the inner diameter of the insertion groove (10).