A high efficiency diffusion pump cold trap

Abstract

The present application relates to the technical field of cold trap, and particularly relates to a high-efficiency diffusion pump cold trap, which comprises a cold trap shell, the cold trap shell comprises a cold trap shell body and a cold trap cover body; further comprising a condensing assembly, the condensing assembly comprises a cylindrical main condensing cavity, a plurality of sub-condensing cavities and a coil condensing pipe; the inside of the main condensing cavity forms a main condensing cavity; one end of the sub-condensing cavity extends into the main condensing cavity along the radial direction of the main condensing cavity to form a condensing connecting part, and the other end of the sub-condensing cavity extends out of the condensing diffusion part along the radial direction of the main condensing cavity; the inside of the sub-condensing cavity forms a sub-condensing cavity; the plurality of sub-condensing cavities are respectively communicated with the main condensing cavity; the coil condensing pipe is in contact with the inner wall of the main condensing cavity; and the coil condensing pipe is also respectively in contact with the condensing connecting parts of the plurality of sub-condensing cavities. The present application can efficiently condense the oil vapor and other gas molecules generated by the diffusion pump, and significantly improves the efficiency of the oil vapor trapping, adsorbing and condensing.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cold traps, in particular to a high-efficiency diffusion pump cold trap. BACKGROUND

[0002] A cold trap is a device that prevents vapors or liquids from entering or leaving a measuring instrument. It provides a very low-temperature surface on which molecules can condense, and it can improve the vacuum level by one to two orders of magnitude. It is commonly used in chemical, biological, and physical detection tests that require low-temperature conditions, and it provides a constant-temperature circulating cooling liquid. It is also often used in oil diffusion pumps, which are devices installed between a vacuum container and a vacuum pump. By cooling the gas, the cold trap condenses and traps the vapor, preventing other substances and water vapor from entering the oil pump and reducing the service life and vacuum level of the oil pump.

[0003] In related technologies, traditional diffusion pump cold traps have many shortcomings in terms of condensation efficiency, structural rationality, and maintenance convenience. For example, the design of the condensation cavity is not reasonable, resulting in low condensation efficiency. For example, the application number CN202120840894.0 discloses a high-efficiency diffusion pump cold trap, which includes a cold trap body installed at the inlet of the diffusion pump, and a plurality of grooves are arranged on the inner surface of the cold trap body. The inner surface of the cold trap body is provided with a plurality of grooves or is in a crumpled or wavy shape. These designs can increase the surface area of the inner side of the cold trap body, thereby increasing the heat exchange area and the area for trapping and adsorbing oil vapor, and improving the efficiency of trapping, adsorbing, and condensing oil vapor, improving the effect of the coating process, and ensuring the quality of the product. However, the device has the following problems: 1. The cold trap body is in a cylindrical structure, and the surface area of the inner side of the cold trap body is small, which has the disadvantage of low efficiency of trapping, adsorbing, and condensing oil vapor; 2. The liquid condensed inside the device often waits for the droplets to condense and drop automatically, and the accumulation of droplets for a long time adversely affects the condensation effect. SUMMARY

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the purpose of the present application is to provide a high-efficiency diffusion pump cold trap, which can efficiently condense the oil vapor and other gas molecules generated by the diffusion pump through the design of the main condensation cavity and the sub-condensation cavity, and the close contact of the coil condenser pipe and the flow of the cooling medium, thereby significantly improving the efficiency of trapping, adsorbing, and condensing oil vapor.

[0005] The first aspect of the present application provides a high-efficiency diffusion pump cold trap, which includes a cold trap housing, the cold trap housing including a cold trap shell and a cold trap cover, the inside of the cold trap shell forming a top-open containing cavity, and the cold trap cover being attached to the top opening of the cold trap shell; and further comprising:

[0006] A condensing assembly includes a cylindrical main condensing chamber, multiple sub-condensing chambers, and a coiled condenser tube. The main condensing chamber has an axially extending cylindrical main condensing chamber inside. The multiple sub-condensing chambers are spaced apart circumferentially along the main condensing chamber. One end of each sub-condensing chamber extends radially into the main condensing chamber to form a condensing connection, and the other end extends radially outward into a condensing diffusion section. The multiple condensing diffusion sections are detachably connected to the inner wall of the receiving chamber. Each sub-condensing chamber has a cuboid-shaped sub-condensing chamber extending vertically through its upper and lower surfaces. The multiple sub-condensing chambers are connected to the main condensing chamber. A coiled condenser tube is installed inside the main condensing chamber and contacts the inner wall of the main condensing chamber. The coiled condenser tube also contacts the condensing connection sections of the multiple sub-condensing chambers.

[0007] In a first aspect of the invention, as a preferred embodiment, a water storage container is further included, which is disposed within the receiving cavity and located below the condensation assembly, and is used to receive droplets dripping from the condensation assembly.

[0008] In a first aspect of the invention, as a preferred embodiment, a drain outlet is provided on the outer wall of the water storage container, and the drain outlet is connected to an external water pumping device through the cold trap shell via a pipe or connector.

[0009] In a first aspect of the invention, as a preferred embodiment, a droplet scraping mechanism is further included. The droplet scraping mechanism includes a plurality of scraping components respectively installed in a plurality of sub-condensing chambers and a driving device installed on the cold trap shell. The driving device is used to synchronously drive the scrapers of the plurality of scraping components to slide up and down along the inner walls of the plurality of sub-condensing chambers to scrape off condensed but not dripping droplets.

[0010] In a first aspect of the invention, as a preferred embodiment,

[0011] The condensation diffusion section of the sub-condensation cavity has a vertical guide groove extending in the vertical direction on its side wall;

[0012] The scraping assembly includes two fixed seats, a threaded rod, a movable seat, a transverse connector, a scraper fixing plate, a scraper, and a first transmission assembly;

[0013] The two fixing seats are respectively installed on the upper and lower parts of the outer side wall of the sub-condensation cavity;

[0014] The threaded rod is rotatably mounted between the two fixed seats;

[0015] The movable seat is provided with a threaded hole, and the movable seat is threadedly connected to the threaded rod through the threaded hole;

[0016] One end of the horizontal connector is connected to one side of the movable base body, and the other end of the horizontal connector extends through the vertical guide groove into the sub-condensation chamber of the condensation diffusion section.

[0017] The scraper fixing plate is located inside the sub-condensation chamber and is installed at one end of the transverse connecting member;

[0018] The scraper is installed on the lower part of the scraper fixing plate, and one side of the scraper contacts the inner wall of the sub-condensation chamber; the scraper is long and strip-shaped, and its length matches the long side of the sub-condensation chamber.

[0019] The first transmission assembly is mounted on the fixed base located above, and the first transmission assembly is used to drive the threaded rod to rotate.

[0020] In a first aspect of the present invention, as a preferred embodiment, the first transmission assembly includes a main transmission wheel, a transmission belt, and a driven transmission wheel; the main transmission wheel and the driven transmission wheel are rotatably mounted on an upper fixed base, the main transmission wheel and the driven transmission wheel are connected by a transmission belt, the driven transmission wheel is connected to the upper part of the threaded rod, and the driven transmission wheel can drive the threaded rod to rotate.

[0021] In a first aspect of the invention, as a preferred embodiment, the scraping assembly further includes two outer guide rails and two inner guide rails;

[0022] The movable seat has two sliding grooves symmetrically arranged at both ends of the threaded hole;

[0023] The two outer guide rails are installed between the two fixed seats, and the two outer guide rails are respectively slidably engaged with the two sliding grooves;

[0024] The two inner guide rails are installed vertically inside the sub-condensation chamber and are located on both sides of the scraper fixing plate, with the two ends of the scraper fixing plate slidingly engaged with the two inner guide rails respectively.

[0025] In a first aspect of the invention, as a preferred embodiment, the scraping assembly is installed on the opposite two sidewalls of each of the sub-condensation chambers.

[0026] In a first aspect of the present invention, as a preferred embodiment, the driving device includes a first transmission box, a fixed frame, a drive motor, a driving gear, a first rotating shaft, a driven gear, a toothed belt, a main gear, a first toothed ring, a plurality of secondary gears, a second toothed ring, a plurality of second rotating shafts, and a plurality of meshing gears;

[0027] The first transmission box is installed on the top surface of the cold trap cover, and the inner wall of the first transmission box forms an installation cavity;

[0028] The mounting bracket includes multiple vertical connecting columns, a first annular support base, and a second annular support base; the first annular support base and the second annular support base are connected by the multiple vertical connecting columns; a support tray is also provided in the middle of the first annular support base; the second annular support base is rotatably mounted at the top opening of the cold trap housing.

[0029] The drive motor is installed at one end of the first transmission box, and the output end of the drive motor extends vertically into the mounting cavity of the first transmission box;

[0030] The drive gear is mounted on the output shaft of the drive motor and located within the mounting cavity;

[0031] The first rotating shaft is rotatably mounted between the cold trap cover and the support tray;

[0032] The driven gear is mounted on the upper part of the first rotating shaft; the driving gear is connected to the driven gear via the toothed belt.

[0033] The main gear is mounted on the lower part of the first rotating shaft;

[0034] The first toothed ring is mounted on the inner sidewall of the support tray;

[0035] The plurality of secondary gears are rotatably mounted on the inner bottom wall of the support tray, and the plurality of secondary gears mesh with the main gear and the plurality of secondary gears also mesh with the first gear ring.

[0036] The second toothed ring is mounted on the inner sidewall of the second annular support.

[0037] The plurality of meshing gears are connected one-to-one with the plurality of main drive wheels through the plurality of second rotating shafts; the plurality of meshing gears respectively mesh with the second gear ring.

[0038] In a first aspect of the present invention, as a preferred embodiment, the number of sub-condensing cavities is three, the number of scraping components is six, and a set of scraping components is installed on the two opposite side walls of each sub-condensing cavity.

[0039] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0040] 1. The cold trap shell of the present invention is used to be installed at or near the inlet of a diffusion pump; a gap is formed between the cold trap cover and the cold trap shell to allow air to enter, or an inlet pipe is provided on the cold trap cover and an outlet pipe is provided on the side wall of the cold trap shell; when the diffusion pump starts working, it generates a strong negative pressure environment to attract and expel gas molecules in the vacuum system. These gas molecules, upon passing through the inlet of the diffusion pump, diffuse into the receiving cavity of the cold trap shell. Under the action of the condensation assembly, the gas molecules exchange heat with the coiled condenser tube, are absorbed by the cooling medium, and have their heat carried away, thus condensing into a liquid state. The condensed droplets drip along the walls of the sub-condensation cavities and the main condensation cavity. In the present invention, multiple sub-condensation cavities are circumferentially distributed around the main condensation cavity, with one end extending into the main condensation cavity to form a condensation connection, and the other end extending out to form a condensation diffusion section, connected to the inner wall of the receiving cavity. This layout increases the condensation area and promotes the effective condensation of gas molecules. The coiled condenser tube is placed inside the main condensing chamber, in close contact with the inner wall of the main condensing chamber and the condensing connection part of the sub-condensing chamber. This design ensures that the condenser tube can effectively transfer the low temperature of the cooling medium, causing the passing gas molecules to cool down and condense rapidly. Through the ingenious design of the main condensing chamber and the sub-condensing chamber, as well as the close contact of the coiled condenser tube and the flow of the cooling medium, this invention can efficiently condense oil vapor and other gas molecules generated by the diffusion pump, significantly improving the efficiency of oil vapor capture, adsorption, and condensation. The condensing diffusion part of the sub-condensing chamber is detachably connected to the inner wall of the receiving chamber. This design facilitates the disassembly and assembly of the condensing assembly, while ensuring that the condensing assembly can be suspended in the receiving chamber, allowing droplets to drip smoothly.

[0041] 2. This invention also includes a droplet scraping mechanism, which comprises multiple scraping components respectively installed in the multiple sub-condensing chambers and a driving device installed on the cold trap shell. The driving device synchronously drives the scrapers of the multiple scraping components to slide up and down along the inner walls of the multiple sub-condensing chambers to scrape off condensed but not dripping droplets. When the driving device is activated, the driving force it generates is transmitted to each scraping component through a synchronization mechanism. Under the action of the driving force, the scrapers begin to slide up and down along the inner walls of the sub-condensing chambers. During this process, the scrapers scrape off the droplets condensed on the inner walls. The scraped droplets fall into the water storage container under the action of gravity, thereby achieving effective collection and treatment of droplets. The droplet scraping mechanism can ensure that the droplets on the inner walls of the sub-condensing chambers are scraped off in a timely manner, avoiding the impact of droplet accumulation on the condensation effect, thereby improving the condensation efficiency. The scraped droplets fall directly into the water storage container, improving the droplet collection efficiency and collection volume. Regularly activating the droplet scraping mechanism can effectively prevent droplets from accumulating on the inner wall of the sub-condensation chamber over a long period of time, reducing the frequency and cost of cleaning and maintenance.

[0042] 3. This invention uses a single drive motor to drive multiple threaded rods to rotate synchronously. The rotation of the threaded rods is transmitted to the moving seat via a threaded connection, causing the moving seat to move up and down along the threaded rods. The movement of the moving seat is transmitted to the scraper fixing plate and the scraper via a transverse connecting piece, causing the scraper to slide up and down along the inner wall of the sub-condensation chamber. During the sliding process, the scraper removes the liquid droplets condensed on the inner wall. It has the advantages of compact structure, high transmission efficiency, low cost, and good synchronization, ensuring the synchronous movement of multiple threaded rods and scrapers, and improving the stability and reliability of the system. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of the structure of the high-efficiency diffusion pump cold trap of the present invention;

[0044] Figure 2 This is a schematic diagram of the high-efficiency diffusion pump cold trap of the present invention with the cold trap cover removed;

[0045] Figure 3 This is a schematic diagram of the structure of the high-efficiency diffusion pump cold trap with the cold trap shell of the present invention;

[0046] Figure 4 This is a schematic diagram of the structure of the present invention with the cold trap cover removed;

[0047] Figure 5 This is a schematic diagram of the separate structure of the condensation assembly, the scraping assembly, and the driving device of the present invention;

[0048] Figure 6 This is a schematic diagram of the scraping component of the present invention;

[0049] Figure 7 This is a schematic diagram of the scraper fixing, scraper and inner guide rail of the present invention;

[0050] Figure 8 This is a schematic diagram of the separate structure of the scraper fixation, scraper, and inner guide rail of the present invention.

[0051] In the picture:

[0052] 10. Cold trap outer shell; 11. Cold trap housing; 12. Cold trap cover;

[0053] 20. Condensing assembly; 21. Main condensing chamber; 22. Sub-condensing chamber; 221. Condensing connection; 222. Condensing diffuser; 2221. Vertical guide groove; 23. Coil-type condenser tube;

[0054] 30. Water storage container;

[0055] 41. Scraping assembly; 411. Fixed base; 412. Threaded rod; 413. Moving base; 414. Transverse connecting piece; 415. Scraper fixing plate; 416. Scraper; 417. First transmission assembly; 4171. Main transmission wheel; 4172. Transmission belt; 4173. Driven transmission wheel; 418. Outer guide rail; 419. Inner guide rail;

[0056] 42. Drive unit; 421. First transmission box; 422. Fixing frame; 4221. Vertical connecting column; 4222. First annular support; 4223. Second annular support; 423. Drive motor; 424. Driving gear; 425. First rotating shaft; 426. Driven gear; 427. Toothed belt; 428. Main gear; 429. First toothed ring; 4210. Secondary gear; 4211. Second toothed ring; 4212. Second rotating shaft; 4213. Meshing gear. Detailed Implementation

[0057] The invention will now be further described with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments. Unless otherwise specified, the materials and equipment used in this embodiment are commercially available. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0058] In the description of this application, it should be understood that the terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In the description of this application, "a plurality of" means two or more, unless otherwise precisely specified.

[0059] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "connected," "linked," and "connected" should be interpreted broadly. For example, they can refer to a fixed connection, a connection through an intermediary, or a connection within two elements or an interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0060] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such process, method, product, or apparatus.

[0061] Please refer to Figures 1-8 As shown, this embodiment provides a high-efficiency diffusion pump cold trap, including a cold trap shell 10, which includes a cold trap housing 11 and a cold trap cover 12. The interior of the cold trap housing 11 forms a receiving cavity with an open top, and the cold trap cover 12 covers the top opening of the cold trap housing 11; it also includes a condensation assembly 20.

[0062] Specifically, the condensing assembly 20 includes a cylindrical main condensing chamber 21, multiple sub-condensing chambers 22, and a coiled condenser tube 23. The main condensing chamber 21 forms a cylindrical main condensing chamber that extends through its axial direction. The multiple sub-condensing chambers 22 are distributed circumferentially around the main condensing chamber 21. One end of each sub-condensing chamber 22 extends radially into the main condensing chamber 21 to form a condensing connection portion 221, and the other end extends radially outward into a condensing diffusion portion 222. The multiple condensing diffusion portions 222 are detachably connected to the inner wall of the receiving chamber. The sub-condensing chambers 22 form cuboid-shaped sub-condensing chambers that extend vertically through their upper and lower surfaces. The multiple sub-condensing chambers are connected to the main condensing chamber. The coiled condenser tube 23 is installed in the main condensing chamber and contacts the inner wall of the main condensing chamber 21. The coiled condenser tube 23 also contacts the condensing connection portions 221 of the multiple sub-condensing chambers 22.

[0063] Based on the above structure, the cold trap shell 10 is installed at or near the inlet of the diffusion pump; a gap is formed between the cold trap cover 12 and the cold trap housing 11 to allow air to enter, or an inlet pipe is provided on the cold trap cover 12 and an outlet pipe is provided on the side wall of the cold trap housing 11; when the diffusion pump starts working, it generates a strong negative pressure environment to attract and expel gas molecules in the vacuum system. When these gas molecules pass through the inlet of the diffusion pump, they diffuse into the receiving cavity of the cold trap shell 10. Under the action of the condensation assembly 20, the gas molecules exchange heat with the coiled condenser tube 23, are absorbed by the cooling medium and have their heat carried away, thereby condensing into a liquid state. The condensed droplets drip along the walls of the sub-condensation chambers 22 and the main condensation chamber. In this invention, multiple sub-condensation chambers 22 are circumferentially distributed around the main condensation chamber 21, with one end extending into the main condensation chamber to form a condensation connection 221, and the other end extending out to form a condensation diffusion section 222, connected to the inner wall of the receiving cavity. This layout increases the condensation area, promoting effective condensation of gas molecules. The coiled condenser tube 23 is placed inside the main condensation chamber, in close contact with the inner wall of the main condensation chamber 21 and the condensation connection 221 of the sub-condensation chamber 22. This design ensures that the condenser tube can effectively transfer the low temperature of the cooling medium, causing the passing gas molecules to cool and condense rapidly. Through the ingenious design of the main condensation chamber 21 and the sub-condensation chamber 22, as well as the close contact of the coiled condenser tube 23 and the flow of the cooling medium, this invention can efficiently condense oil vapor and other gas molecules generated by the diffusion pump, significantly improving the efficiency of oil vapor capture, adsorption, and condensation. The condensation diffusion section 222 of the sub-condensation chamber 22 is detachably connected to the inner wall of the receiving cavity. This design facilitates the assembly and disassembly of the condensation component 20, while ensuring that the condensation component 20 can be suspended within the receiving cavity, allowing droplets to fall smoothly.

[0064] In a preferred embodiment of the present invention, a water storage container 30 is further included. The water storage container 30 is disposed in the receiving cavity and located below the condensation assembly 20. The water storage container 30 is used to receive liquid droplets dripping from the condensation assembly 20.

[0065] Based on the above structure, the water storage container 30 of the present invention is cleverly positioned below the condensation assembly 20 to collect the droplets that drip after condensation. This arrangement simplifies the condensate collection process, improves collection efficiency, and reduces the risk of condensate contamination of other components of the cold trap.

[0066] In a preferred embodiment of the present invention, a drain outlet is provided on the outer wall of the water storage container 30, and the drain outlet is connected to an external water pumping device through a pipe or connector through the cold trap shell 11.

[0067] Based on the above structure, when the droplets in the water storage container 30 accumulate to a certain amount, the water pump will automatically start and extract the droplets through the drain outlet. The water pump can quickly extract the droplets from the water storage container 30, avoiding the long-term accumulation of droplets in the tank, thereby improving the processing efficiency.

[0068] In a preferred embodiment of the present invention, a droplet scraping mechanism is further included. The droplet scraping mechanism includes a plurality of scraping components 41 respectively installed in a plurality of sub-condensing chambers and a driving device installed on the cold trap housing 10. The driving device is used to synchronously drive the scrapers 416 of the plurality of scraping components 41 to slide up and down along the inner walls of the plurality of sub-condensing chambers to scrape off the condensed but not dripping droplets.

[0069] Based on the above structure, when the drive device is activated, the driving force it generates is transmitted to each scraping component 41 through a synchronization mechanism. Under the action of the driving force, the scraper 416 begins to slide up and down along the inner wall of the sub-condensation chamber. During this process, the scraper 416 scrapes off the droplets condensed on the inner wall. The scraped droplets fall into the water storage container 30 under the action of gravity, thereby achieving effective collection and treatment of droplets. The droplet scraping mechanism ensures that droplets on the inner wall of the sub-condensation chamber are scraped off in a timely manner, avoiding the impact of droplet accumulation on the condensation effect, thereby improving condensation efficiency. The scraped droplets fall directly into the water storage container 30, improving the droplet collection efficiency and collection volume. Regularly activating the droplet scraping mechanism can effectively prevent the long-term accumulation of droplets on the inner wall of the sub-condensation chamber, reducing the frequency and cost of cleaning and maintenance.

[0070] In a preferred embodiment of the present invention,

[0071] A vertical guide groove 2221 extending in the vertical direction is provided on the side wall of the condensation diffusion section 222 of the sub-condensation cavity 22;

[0072] The scraping assembly 41 includes two fixed seats 411, a threaded rod 412, a movable seat 413, a transverse connector 414, a scraper fixing plate 415, a scraper 416, and a first transmission assembly 417;

[0073] Two mounting bases 411 are respectively installed on the upper and lower parts of the outer side wall of the sub-condensation chamber 22;

[0074] The threaded rod 412 is rotatably mounted between two fixed seats 411;

[0075] The movable seat 413 is provided with a threaded hole, and the movable seat 413 is threadedly connected to the threaded rod 412 through the threaded hole;

[0076] One end of the transverse connector 414 is connected to one side of the main body of the movable base 413, and the other end of the transverse connector 414 extends through the vertical guide groove 2221 into the sub-condensation chamber of the condensation diffusion section 222.

[0077] The scraper fixing plate 415 is located inside the sub-condensation chamber and installed at one end of the transverse connector 414;

[0078] The scraper 416 is installed on the lower part of the scraper fixing plate 415, and one side of the scraper 416 contacts the inner wall of the sub-condensation chamber; the scraper 416 is long and strip-shaped, and its length matches the long side of the sub-condensation chamber.

[0079] The first transmission assembly 417 is mounted on the fixed base 411 located above, and the first transmission assembly 417 is used to drive the threaded rod 412 to rotate.

[0080] Based on the above structure, when the first transmission assembly 417 is activated, it drives the threaded rod 412 to rotate. The rotation of the threaded rod 412 is transmitted to the movable seat 413 through a threaded connection, causing the movable seat 413 to move up and down along the threaded rod 412. The movement of the movable seat 413 is transmitted to the scraper fixing plate 415 and the scraper 416 through the transverse connector 414, causing the scraper 416 to slide up and down along the inner wall of the sub-condensation chamber. During the sliding process, the scraper 416 scrapes off the droplets condensed on the inner wall, and the droplets subsequently fall into the storage tank or are collected by other collection devices. The vertical guide groove 2221 provides a movement path for the transverse connector 414 of the scraping assembly 41, ensuring that the scraper 416 can slide up and down along the inner wall of the sub-condensation chamber 22. The transverse connector 414 ensures that the scraper 416 can stably extend into the sub-condensation chamber and move along the inner wall. The scraper 416 is in close contact with the inner wall of the sub-condensation chamber, which can efficiently scrape off the condensed droplets. The design of the threaded drive and the transverse connecting member 414 ensures the stability and accuracy of the scraper 416 during the scraping process. Thus, the scraping assembly 41 achieves efficient scraping of liquid droplets from the inner wall of the sub-condensation chamber. Furthermore, the combination of the cuboid sub-condensation chamber and the elongated scraper 416 ensures full contact between the scraper 416 and the inner wall, achieving an efficient and uniform scraping effect.

[0081] In a preferred embodiment of the present invention, the first transmission assembly 417 includes a main transmission wheel 4171, a transmission belt 4172, and a driven transmission wheel 4173; the main transmission wheel 4171 and the driven transmission wheel 4173 are rotatably mounted on the upper fixed base 411, and the main transmission wheel 4171 and the driven transmission wheel 4173 are connected by the transmission belt 4172. The driven transmission wheel 4173 is connected to the upper part of the threaded rod 412, and the driven transmission wheel 4173 can drive the threaded rod 412 to rotate.

[0082] Based on the above structure, the rotation of the main drive wheel 4171 is transmitted to the driven wheel 4173 via the drive belt 4172, causing the driven wheel 4173 to also begin to rotate. The rotation of the driven wheel 4173 drives the threaded rod 412 connected to it to rotate. The rotation of the threaded rod 412 is converted into the up-and-down movement of the moving seat 413 through the threaded connection. The movement of the moving seat 413 is transmitted to the scraper fixing plate 415 and the scraper 416 through the transverse connecting member 414, causing the scraper 416 to slide up and down on the inner wall of the sub-condensation chamber, realizing the function of scraping off liquid droplets. This invention uses a drive belt 4172 to connect the main drive wheel 4171 and the driven wheel 4173, which can achieve efficient rotational power transmission. The combined design of the main drive wheel 4171, the drive belt 4172, and the driven wheel 4173 makes the transmission assembly structure compact, easy to install and maintain.

[0083] In a preferred embodiment of the invention, the scraping assembly 41 further includes two outer guide rails 418 and two inner guide rails 419.

[0084] The movable seat 413 has two sliding grooves symmetrically arranged at both ends of the threaded hole;

[0085] Two outer guide rails 418 are installed between two fixed seats 411, and the two outer guide rails are respectively slidably engaged with two sliding grooves;

[0086] Two inner guide rails 419 are installed vertically inside the sub-condensation chamber and are located on both sides of the scraper 416 connecting plate. The two ends of the scraper 416 connecting plate are slidably engaged with the two inner guide rails 419.

[0087] Based on the above structure, when the threaded rod 412 rotates, the movable seat 413 moves up and down along the threaded rod 412 via a threaded connection. Simultaneously, the sliding groove on the movable seat 413 slides in engagement with the outer guide rail, ensuring that the moving trajectory of the movable seat 413 remains vertical and stable. The scraper 416 connecting plate slides in engagement with the inner guide rail through its sliding portions at both ends, allowing the scraper 416 to accurately slide up and down on the inner wall of the sub-condensing chamber. This invention, through the coordinated design of the outer and inner guide rails, significantly enhances the stability of the scraper 416 during movement, avoiding uneven scraping or damage to the scraper 416 due to skewing or shaking. Through the dual guiding effect of the inner and outer guide rails, the scraper 416 can more accurately conform to the inner wall of the sub-condensing chamber for scraping operations.

[0088] In a preferred embodiment of the invention, a scraping assembly 41 is installed on each of the two opposite sidewalls of each sub-condensation chamber 22.

[0089] Based on the above structure, the dual-sided scrapers 416 can work simultaneously, significantly improving the efficiency of removing droplets. Compared to single-sided installation, the dual-sided scrapers 416 can complete the cleaning of the entire inner wall of the sub-condensing chamber in a shorter time. The two scrapers 416 scrape from both sides of the sub-condensing chamber, ensuring that every corner and crevice of the inner wall is effectively cleaned. This dual-sided scraping method avoids omissions or uneven cleaning that may occur with single-sided scraping. The dual-sided scrapers 416 can balance each other during operation, reducing the risk of the scrapers 416 tilting or wobbling due to force applied to one side. This balance helps maintain the stable movement of the scrapers 416, improving the accuracy and effectiveness of the scraping.

[0090] In a preferred embodiment of the present invention, the drive device 42 includes a first transmission box 421, a fixed frame 422, a drive motor 423, a drive gear 424, a first rotating shaft 425, a driven gear 426, a toothed belt 427, a main gear 428, a first toothed ring 429, a plurality of secondary gears 4210, a second toothed ring 4211, a plurality of second rotating shafts 4212, and a plurality of meshing gears 4213;

[0091] The first transmission box 421 is installed on the top surface of the cold trap cover 12, and the inner wall of the first transmission box 421 forms an installation cavity.

[0092] The mounting bracket 422 includes multiple vertical connecting columns 4221, a first annular support base 4222, and a second annular support base 4223; the first annular support base 4222 and the second annular support base 4223 are connected by multiple vertical connecting columns 4221; a support tray is also provided in the middle of the first annular support base 4222; the second annular support base is rotatably mounted at the top opening of the cold trap housing 11.

[0093] The drive motor 423 is installed at one end of the first transmission box 421, and the output end of the drive motor 423 extends vertically into the mounting cavity of the first transmission box 421.

[0094] The drive gear 424 is mounted on the output shaft of the drive motor 423 and located inside the mounting cavity;

[0095] The first rotating shaft 425 is rotatably mounted between the cold trap cover 12 and the support tray;

[0096] Driven gear 426 is mounted on the upper part of the first rotating shaft 425; driven gear 426 is connected to driven gear 427 through toothed belt 427;

[0097] The main gear 428 is mounted on the lower part of the first rotating shaft 425;

[0098] The first toothed ring 429 is installed on the inner side wall of the support tray;

[0099] Multiple secondary gears 4210 are rotatably mounted on the inner bottom wall of the support tray. The multiple secondary gears 4210 mesh with the main gear 428 and also mesh with the first gear ring 429.

[0100] The second toothed ring 4211 is installed on the inner wall of the second annular support 4223;

[0101] Multiple meshing gears 4213 are connected one-to-one with multiple main drive wheels 4171 via multiple second rotating shafts 4212; the multiple meshing gears 4213 respectively mesh with the second gear ring 4211.

[0102] Based on the above structure, the drive motor 423 starts working, and its output shaft drives the drive gear 424 to rotate. The drive gear 424 is connected to the driven gear 426 via a toothed belt 427, so the rotation of the drive gear 424 will drive the driven gear 426 to rotate synchronously. The driven gear 426 is mounted on the upper part of the first rotating shaft 425, so the rotation of the driven gear 426 will drive the first rotating shaft 425 to rotate. A main gear 428 is mounted on the lower part of the first rotating shaft 425, and the main gear 428 meshes with multiple secondary gears 4210. Therefore, the rotation of the first rotating shaft 425 will drive the main gear 428 to rotate, which in turn will drive the multiple secondary gears 4210 to rotate synchronously. The multiple secondary gears 4210 mesh with the first gear ring 429 respectively. Therefore, the rotation of the secondary gears 4210 will drive the first gear ring 429 to rotate. The first gear ring 429 is mounted on the inner side wall of the support tray, and the support tray is part of the fixing frame 422. Therefore, the rotation of the first gear ring 429 will drive the entire fixed frame 422 to rotate. A second gear ring 4211 is installed on the inner wall of the second annular support 4223 of the fixed frame 422. Therefore, the rotation of the fixed frame 422 will drive the second gear ring 4211 to rotate. The second gear ring 4211 meshes with multiple meshing gears 4213. Therefore, the rotation of the second gear ring 4211 will drive the multiple meshing gears 4213 to rotate synchronously. The multiple meshing gears 4213 are respectively connected to multiple main drive wheels 4171 one-to-one through multiple second rotating shafts 4212. Therefore, the rotation of the meshing gears 4213 will drive the main drive wheels 4171 to rotate synchronously. The main drive wheels 4171 and the driven drive wheels 4173 are connected by a transmission belt 4172. Therefore, the rotation of the main drive wheels 4171 will drive the driven drive wheels 4173 to rotate synchronously. The driven drive wheels 4173 are connected to the threaded rod 412. Therefore, the rotation of the transmission wheel 4173 drives the threaded rod 412 to rotate. The threaded rod 412 is connected to the movable seat 413 by a thread. Thus, the rotation of the threaded rod 412 is converted into the up-and-down movement of the movable seat 413. In this way, the present invention uses a drive motor 423 to drive multiple threaded rods 412 to rotate synchronously. The rotation of the threaded rod 412 is transmitted to the movable seat 413 through the threaded connection, causing the movable seat 413 to move up and down along the threaded rod 412. The movement of the movable seat 413 is transmitted to the scraper fixing plate 415 and the scraper 416 through the transverse connecting member 414, causing the scraper 416 to slide up and down along the inner wall of the sub-condensation chamber. During the sliding process, the scraper 416 scrapes away the liquid droplets condensed on the inner wall. It has the advantages of compact structure, high transmission efficiency, low cost and good synchronization, ensuring the synchronous movement of multiple threaded rods 412 and scraper 416, and improving the stability and reliability of the system.

[0103] In a preferred embodiment of the present invention, there are three sub-condensation chambers 22 and six sets of scraping components 41, with one set of scraping components 41 installed on each of the two opposite sidewalls of each sub-condensation chamber 22. This provides the advantage of good stability.

[0104] Although only certain components and embodiments of this application have been illustrated and described, many modifications and alterations will be apparent to those skilled in the art without actually departing from the scope and spirit of the claims, such as variations in the size, dimensions, structure, shape and proportion of the various elements, installation arrangement, material use, color, orientation, etc.

[0105] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A high-efficiency diffusion pump cold trap, comprising a cold trap housing, the cold trap housing including a cold trap shell and a cold trap cover, wherein the interior of the cold trap shell forms a receiving cavity with an open top, and the cold trap cover covers the top opening of the cold trap shell; characterized in that, Also includes: A condensing assembly includes a cylindrical main condensing chamber, multiple sub-condensing chambers, and a coiled condenser tube. The main condensing chamber has an axially extending cylindrical main condensing chamber inside. The multiple sub-condensing chambers are spaced apart circumferentially along the main condensing chamber. One end of each sub-condensing chamber extends radially into the main condensing chamber to form a condensing connection, and the other end extends radially outward into a condensing diffusion section. The multiple condensing diffusion sections are detachably connected to the inner wall of the receiving chamber. Each sub-condensing chamber has a cuboid-shaped sub-condensing chamber extending vertically through its upper and lower surfaces. The multiple sub-condensing chambers are connected to the main condensing chamber. A coiled condenser tube is installed inside the main condensing chamber and contacts the inner wall of the main condensing chamber. The coiled condenser tube also contacts the condensing connection sections of the multiple sub-condensing chambers. It also includes a water storage container, which is disposed in the receiving cavity and located below the condensation component. The water storage container is used to collect the liquid droplets dripping from the condensation component. A drain outlet is provided on the outer wall of the water storage container, and the drain outlet is connected to an external water pumping device through the cold trap shell via a pipe or connector. It also includes a droplet scraping mechanism, which includes multiple scraping components installed in multiple sub-condensing chambers and a driving device installed on the cold trap shell. The driving device is used to synchronously drive the scrapers of the multiple scraping components to slide up and down along the inner walls of the multiple sub-condensing chambers to scrape off the condensed but not dripping droplets. A vertical guide groove extending in the vertical direction is provided on the side wall of the condensation diffusion section of the sub-condensing chamber. The scraping assembly includes two fixed seats, a threaded rod, a movable seat, a transverse connector, a scraper fixing plate, a scraper, and a first transmission assembly; The two fixing seats are respectively installed on the upper and lower parts of the outer side wall of the sub-condensation cavity; The threaded rod is rotatably mounted between the two fixed seats; The movable seat is provided with a threaded hole, and the movable seat is threadedly connected to the threaded rod through the threaded hole; One end of the lateral connector is connected to one side of the movable base body, and the other end of the lateral connector extends through the vertical guide groove into the sub-condensation chamber of the condensation diffusion section. The scraper fixing plate is located inside the sub-condensation chamber and is installed at one end of the transverse connecting member; The scraper is installed on the lower part of the scraper fixing plate, and one side of the scraper contacts the inner wall of the sub-condensation chamber; the scraper is long and strip-shaped, and its length matches the long side of the sub-condensation chamber. The first transmission assembly is mounted on the fixed base located above, and the first transmission assembly is used to drive the threaded rod to rotate.

2. The high-efficiency diffusion pump cold trap as described in claim 1, characterized in that, The first transmission assembly includes a main drive wheel, a drive belt, and a driven drive wheel; the main drive wheel and the driven drive wheel are rotatably mounted on the upper fixed base, and the main drive wheel and the driven drive wheel are connected by a drive belt. The driven drive wheel is connected to the upper part of the threaded rod, and the driven drive wheel can drive the threaded rod to rotate.

3. The high-efficiency diffusion pump cold trap as described in claim 2, characterized in that, The scraping assembly also includes two outer guide rails and two inner guide rails; The movable seat has two sliding grooves symmetrically arranged at both ends of the threaded hole; The two outer guide rails are installed between the two fixed seats, and the two outer guide rails are respectively slidably engaged with the two sliding grooves; The two inner guide rails are installed vertically inside the sub-condensation chamber and are located on both sides of the scraper fixing plate, with the two ends of the scraper fixing plate slidingly engaged with the two inner guide rails respectively.

4. The high-efficiency diffusion pump cold trap as described in claim 2, characterized in that, The scraping assembly is installed on the two opposite side walls of each of the sub-condensation chambers.

5. The high-efficiency diffusion pump cold trap as described in claim 2, characterized in that, The drive device includes a first transmission box, a fixed frame, a drive motor, a driving gear, a first rotating shaft, a driven gear, a toothed belt, a main gear, a first toothed ring, multiple secondary gears, a second toothed ring, multiple second rotating shafts, and multiple meshing gears; The first transmission box is installed on the top surface of the cold trap cover, and the inner wall of the first transmission box forms an installation cavity; The mounting bracket includes multiple vertical connecting columns, a first annular support base, and a second annular support base; the first annular support base and the second annular support base are connected by the multiple vertical connecting columns; a support tray is also provided in the middle of the first annular support base; the second annular support base is rotatably mounted at the top opening of the cold trap housing. The drive motor is installed at one end of the first transmission box, and the output end of the drive motor extends vertically into the mounting cavity of the first transmission box; The drive gear is mounted on the output shaft of the drive motor and located within the mounting cavity; The first rotating shaft is rotatably mounted between the cold trap cover and the support tray; The driven gear is mounted on the upper part of the first rotating shaft; The driving gear is connected to the driven gear via the toothed belt; The main gear is mounted on the lower part of the first rotating shaft; The first toothed ring is mounted on the inner sidewall of the support tray; The plurality of secondary gears are rotatably mounted on the inner bottom wall of the support tray, and the plurality of secondary gears mesh with the main gear and the plurality of secondary gears also mesh with the first gear ring. The second toothed ring is mounted on the inner sidewall of the second annular support. The plurality of meshing gears are connected one-to-one with the plurality of main drive wheels through the plurality of second rotating shafts; the plurality of meshing gears respectively mesh with the second gear ring.

6. The high-efficiency diffusion pump cold trap as described in claim 5, characterized in that, The number of sub-condensation chambers is three, and the number of scraping components is six sets, with one set of scraping components installed on each of the two opposite side walls of each sub-condensation chamber.

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