CN117605898A - Ventilation mechanism in box under vacuum environment - Google Patents

Abstract

A ventilation mechanism in a box under a vacuum environment, including a static ventilation component fixedly arranged in an external vacuum box and a movable ventilation component capable of moving toward and away from the static ventilation component; the static ventilation component includes an upper ventilation component The dynamic ventilation component includes a lower ventilation component, the upper ventilation component is used to communicate with the ventilation box provided in the external vacuum box, and the lower ventilation component is used to communicate with the outside of the external vacuum box; the dynamic ventilation component Move toward the static ventilation assembly to connect the ventilation box with the outside of the external vacuum box when the lower ventilation part and the upper ventilation part are in contact and connected. Through the static ventilation component and the dynamic ventilation component, when the lower ventilation component is in contact with the upper ventilation component, the ventilation box can be connected to the outside of the vacuum environment, so that the vacuum environment can be maintained without damaging the vacuum environment. , not only can the air pressure in the ventilation box be balanced with the atmospheric pressure, but also the heat exchange box and its internal electronic components can be dissipated through gas exchange to achieve the purpose of protecting the electronic components.

Description

A ventilation mechanism in the box under vacuum environment

Technical field

The invention relates to the field of ventilation technology, and in particular to a ventilation mechanism in a box under a vacuum environment.

Background technique

At present, in order to prevent the electronic components of the equipment from being contaminated by dust or being bumped, the electronic components are generally packaged in a sealed electrical box; however, under certain working conditions, the sealed electrical box containing the electronic components will be in a vacuum environment as the equipment moves. In the vacuum environment, the electronic components in the sealed electrical box not only have difficulty in dissipating heat, but they are also adversely affected by the excessive air pressure difference between the inside and outside.

Contents of the invention

The main technical problem solved by the present invention is to provide a ventilation mechanism in a box under a vacuum environment, which can ventilate the ventilation box without destroying the vacuum environment, thereby not only realizing heat dissipation of the ventilation box, but also It can keep the air pressure in the ventilation box balanced with the atmospheric pressure.

One embodiment provides a ventilation mechanism in a box in a vacuum environment, including:

The static ventilation assembly can be fixedly arranged in the external vacuum box. The static ventilation assembly includes an upper ventilation component, and the upper ventilation component is used to communicate with the ventilation box disposed in the external vacuum box; as well as

A dynamic ventilation assembly that can move toward and away from the static ventilation assembly. The dynamic ventilation assembly includes a lower ventilation component, and the lower ventilation component is configured to communicate with the outside of the outer vacuum box;

The dynamic ventilation component moves toward the static ventilation component, so that when the lower ventilation component abuts the upper ventilation component, the lower ventilation component communicates with the upper ventilation component. To connect the ventilation box with the outside of the external vacuum box.

In one embodiment, the number of the upper ventilation parts and the lower ventilation parts is set to be multiple, and the plurality of lower ventilation parts and the plurality of upper ventilation parts can be in one-to-one correspondence and contact each other. conduction; where:

At least one set of the upper ventilation parts and the lower ventilation parts that are connected are used to discharge gas in the ventilation box to the outside of the external vacuum box, and at least another set of the upper ventilation parts that are connected are used to discharge the gas in the ventilation box to the outside of the external vacuum box. The gas component and the lower ventilation component are used for the gas outside the external vacuum box to enter the ventilation box.

In one embodiment, the upper ventilation part includes an air connection and compression valve core, an air connection part and an air connection valve core. The air connection part is used to communicate with the ventilation box through a tracheal joint. The air connection and compression valve core The valve core is fixedly connected to the other end of the air-connecting part. The air-connecting valve core is arranged in the air-connecting part. The air-connecting valve core penetrates the air-connecting pressing valve core and is pressed tightly with the air-connecting part. Valve core sliding connection;

When the lower ventilating part abuts the air-connecting and compressing valve core, the air-connecting valve core is pressed into the air-connecting part, and the lower ventilating part is in communication with the upper ventilating part.

In one embodiment, the upper ventilation part further includes a valve core compression spring, the air connection part is provided with an accommodation cavity, the air connection pressing valve core covers the accommodation cavity, and the air connection valve core is disposed in the In the accommodation cavity, the valve core compression spring is provided between one end of the gas-connecting valve core and the bottom of the accommodation cavity, and the other end of the gas-connecting valve core penetrates the gas-connecting valve core to compress the valve core.

In one embodiment, the lower ventilation part includes an air-connecting top core, and the air-connecting top core is used to communicate with the outside of the external vacuum box through a tracheal joint; the air-connecting top core is also used to connect the air-connecting top core to the outside of the external vacuum box. The air-connecting valve core is pressed into the air-connecting component to conduct communication between the lower ventilating component and the upper ventilating component.

In one embodiment, the lower ventilation part further includes an air-connecting top core pressure ring and an O-shaped sealing ring. The air-connecting top core is provided with a columnar protrusion. The air-connecting top core pressure ring is sleeved on the The cylindrical protrusion is fixedly connected to the air-connecting ejector core; the O-shaped sealing ring is set on the top of the cylindrical protrusion; when the air-connecting ejector core pressure ring abuts the air-connecting ejector core and tightens the valve core , the gas-connecting top core presses the gas-connecting valve core into the gas-connecting piece, and the O-shaped sealing ring abuts the gas-connecting valve core to tighten the valve core.

In one embodiment, it also includes a lifting body transmission assembly, the lifting body transmission assembly is used to penetrate the outer vacuum box, and one end of the lifting body transmission assembly located inside the outer vacuum box is connected to the dynamic ventilation assembly; The lifting body transmission assembly pushes the moving ventilation assembly to move toward and away from the static ventilation assembly.

In one embodiment, the lifting body transmission assembly includes a transmission shaft, a fixed seat, a lifting block and an eccentric wheel. The transmission shaft is used to penetrate the outer vacuum box, and the fixed seat is used to be fixed on the outer vacuum box. Inside;

One end of the transmission shaft located in the outer vacuum box is fixedly connected to the eccentric wheel, the lifting block is sleeved on the eccentric wheel, and the lifting block is slidingly connected to the fixed seat. The assembly is fixed on the lifting block.

In one embodiment, the transmission shaft is rotatably connected to the outer vacuum box through magnetic fluid.

In one embodiment, the static ventilation assembly further includes a static ventilation plate, the static ventilation plate is used to be fixedly arranged inside the external vacuum box, and the upper ventilation component is disposed through the static ventilation plate. A gas plate, a buffer spring is provided between the static ventilation plate and the upper ventilation part;

and / or

The movable ventilation assembly also includes a movable ventilation plate, the lower ventilation part is disposed through the movable ventilation plate, and the movable ventilation plate is connected to the lifting body transmission assembly.

The ventilation mechanism in the box under the vacuum environment according to the above embodiment includes a static ventilation component fixedly arranged in the outer vacuum box and a movable ventilation component capable of moving toward and away from the static ventilation component; the static ventilation component includes The upper ventilation part, the dynamic ventilation assembly includes a lower ventilation part, the upper ventilation part is used to communicate with the ventilation box installed in the external vacuum box, and the lower ventilation part is used to communicate with the outside of the external vacuum box; The ventilation assembly moves toward the static ventilation assembly to connect the ventilation box with the outside of the outer vacuum box when the lower ventilation part and the upper ventilation part are in contact and connected. Through the cooperation of the dynamic ventilation component and the static ventilation component, when the lower ventilation component is in contact with the upper ventilation component, the ventilation box can be connected to the outside of the vacuum environment; thus, the vacuum environment can be maintained without damaging the vacuum environment. Under such circumstances, on the one hand, the air pressure in the ventilation box can be kept in balance with the atmospheric pressure, so as to avoid the adverse effects of the excessive pressure difference between the inside and outside of the ventilation box on the electronic components installed inside the ventilation box, so as to protect the electronic components. On the other hand, through gas exchange between the ventilation box and the outside of the vacuum environment, the heat dissipation and cooling of the ventilation box and internal electronic components can be achieved.

Description of drawings

Figure 1 is a structural diagram of a ventilation mechanism in a box in a vacuum environment according to an embodiment.

Figure 2 is a structural diagram of the dynamic ventilation assembly of the ventilation mechanism in the box in a vacuum environment according to an embodiment.

Figure 3 is a structural diagram of the static ventilation component of the ventilation mechanism in the box in a vacuum environment according to an embodiment.

Figure 4 is a plan structural view of the ventilating parts of the ventilating mechanism in the box in a vacuum environment according to an embodiment.

Figure 5 is a cross-sectional structural view of the ventilation component in Figure 4.

Figure 6 is a schematic diagram of the ventilation mechanism in the box in use and installation under a vacuum environment according to an embodiment.

Figure 7 is a structural diagram of the transmission assembly of the ventilation mechanism in the box in a vacuum environment according to an embodiment.

Figure 8 is a partial structural cross-sectional view of the transmission assembly in Figure 7.

In the picture: 1. Static ventilation component, 2. Dynamic ventilation component, 3. Lifting body transmission component, 4. Drive shaft, 5. Lifting block, 6. Eccentric wheel, 7. Fixing seat, 8. Lower ventilation part , 9. Upper ventilation part, 10. Silicone sleeve, 11. Ventilation plate fixing column, 12. Upright column, 13. Tracheal joint, 14. Connect to the gas ejector core, 15. Connect to the gas ejector core pressure ring, 16. O-type Sealing ring, 17. Air connection and tightening valve core, 18. Air connection parts, 19. Buffer spring, 20. Air connection valve core, 21. Valve core compression spring, 22. Servo motor, 23. External vacuum box, 24. Inlet Trachea, 25. Air outlet pipe, 26. Ventilation box, 27. Magnetic fluid.

Detailed ways

The present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings. Similar elements in different embodiments use associated similar element numbers. In the following embodiments, many details are described in order to make the present application better understood. However, those skilled in the art can readily recognize that some of the features may be omitted in different situations, or may be replaced by other elements, materials, and methods. In some cases, some operations related to the present application are not shown or described in the specification. This is to avoid the core part of the present application being overwhelmed by excessive descriptions. For those skilled in the art, it is difficult to describe these in detail. The relevant operations are not necessary, and they can fully understand the relevant operations based on the descriptions in the instructions and general technical knowledge in the field.

Additionally, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments. At the same time, each step or action in the method description can also be sequentially exchanged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the various sequences in the description and drawings are only for clearly describing a certain embodiment, and do not imply a necessary sequence, unless otherwise stated that a certain sequence must be followed.

The serial numbers assigned to components in this article, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meaning. The terms "connection" and "connection" mentioned in this application include direct and indirect connections (connections) unless otherwise specified. In addition, terms such as "upper", "lower", "left", "right", "middle", etc. cited in this article are only for convenience of description and are not used to limit the scope of the present invention. , changes or adjustments in their relative relationships, provided there is no substantial change in the technical content, shall also be deemed to be within the scope of the present invention.

Example 1

A specific implementation of this embodiment is a ventilation mechanism in a box in a vacuum environment, as shown in Figure 1, including: a static ventilation assembly 1, a dynamic ventilation assembly 2 and a lifting body transmission assembly 3 ; The static ventilation assembly 1 is fixedly arranged in the outer vacuum box 23; the lifting body transmission assembly 3 penetrates the outer vacuum box 23; one end of the lifting body transmission assembly 3 located in the outer vacuum box 23 is connected to the dynamic ventilation assembly 2 to promote the dynamic ventilation The component 2 moves toward or away from the static ventilation component 1; the static ventilation component 1 is provided with at least two upper ventilation components 9, and the at least two upper ventilation components 9 are both connected to the ventilation box 26; the dynamic ventilation component 2 is provided with at least two lower ventilation components 8, and the at least two lower ventilation components 8 are both connected to the external air source; when the dynamic ventilation component 2 moves to abut against the static ventilation component 1, at least two lower ventilation components 8 The ventilation parts 8 are connected to at least two upper ventilation parts 9 in one-to-one correspondence to realize gas exchange between the external air source and the ventilation box 26 .

In a specific embodiment, the static ventilation assembly 1 is fixed in the outer vacuum box 23 through bolts or clamps, etc., and the dynamic ventilation assembly 2 is fixed on the lifting body transmission assembly 3 through bolts or clamps, etc., when needed When air flow exchange is performed, the dynamic ventilation assembly 2 moves toward the static ventilation assembly 1, and each lower ventilation component 8 on the dynamic ventilation assembly 2 abuts the upper ventilation component 9, and the lower ventilation component 9 is realized through the cooperation of the two. The internal air passages of the gas part 8 and the upper ventilation part 9 are connected. After at least one set of the upper ventilation part 9 and the lower ventilation part 8 are connected, the gas from the external air source enters the ventilation box 26 through the air inlet pipe 24. At the same time, at least one set of upper ventilation parts 9 and lower ventilation parts 8 are connected to lead the gas inside the ventilation box 26 to the outside of the external vacuum box 23 through the air outlet pipe 25, thereby realizing the external air source and ventilation. Gas exchange between the air box bodies 26; in the above specific embodiment, the end of the lifting body transmission assembly 3 located inside the outer vacuum box 23 can be composed of an eccentric wheel 6 mechanism, a crank connecting rod mechanism, or a cylinder and One of the lifting mechanisms such as hydraulic cylinders.

The technical effect achieved by this embodiment is: stably realizing ventilation in the box in a vacuum environment. Through the cooperation of the static ventilation component 1 and the dynamic ventilation component 2, stable ventilation or cooling of the box 26 is achieved. At the same time, the structure is simple, the floor space is small, the movement process is simple, and it is easy to operate and control; thus it effectively solves the problem of ventilation in the box in a vacuum environment.

More specifically, after the lower ventilation part 8 is in contact with the upper ventilation part 9, the inside of the ventilation box 26 can be directly connected to the outside of the vacuum environment (specifically, the external vacuum box 23) without damaging the vacuum environment. The vacuum environment can balance the internal air pressure of the ventilation box 26 with the atmospheric pressure; thus, the internal components (such as electronic components) of the ventilation box 26 can be prevented from being adversely affected by an excessive air pressure difference, causing damage to the electronic components. protection; at the same time, with the help of the conduction relationship between the lower ventilation part 8 and the upper ventilation part 9, the ventilation box 26 can be connected to an external air source provided outside the vacuum environment, and multiple sets of connected upper ventilation parts can be used The component 9 and the lower ventilation component 8 can enable gas to enter and exit the ventilation box 26, thereby realizing gas exchange between the ventilation box 26 and the outside of the vacuum environment, so as to exchange air between the ventilation box 26 and the electrons inside it. Components are cooled by heat dissipation.

Example 2

This embodiment is further improved on the basis of Embodiment 1. As shown in Figure 3, the static ventilation assembly 1 includes a static ventilation plate. The static ventilation plate can be a plate-shaped part. At least two parts are fixed on the static ventilation plate. For example, in order to ensure the inflow and outflow of gas, the two upper ventilation parts 9 can be clamped or threaded on the static ventilation plate. The outlets of the two upper ventilation parts 9 The air port is arranged on the upper surface of the static ventilation plate, and the conductive joint of the upper ventilation part 9 is arranged on the lower surface of the static ventilation plate.

In a specific embodiment, as shown in Figures 4 and 5, the upper ventilation component 9 includes: an air-connecting compression valve core 17, an air-connecting component 18, an air-connecting valve core 20 and a valve core compression spring 21; wherein, The air-connecting part 18 can be a rotary body part, that is, the air-connecting part 18 is a cylindrical section and a flange section connected in sequence. The cylindrical section of the air-connecting part 18 penetrates the static ventilation plate and is opened on the outer peripheral side wall of the cylindrical section. The circlip groove is used to clamp the air-receiving part 18 in the round hole on the static ventilation plate through the circlip; the air-receiving part 18 is provided with a columnar accommodation cavity inward from the lower surface of its flange section to receive the air pressure. The tightening valve core 17 and the air connecting member 18 are fixedly connected and cover the accommodation cavity. The air connecting and compressing valve core 17 is an annular plate-like component. The diameter of the central hole on the air connecting and compressing valve core 17 is smaller than the diameter of the accommodating cavity, and the connecting and compressing valve core 17 is a circular plate-shaped component. The axis of the circular hole on the air pressure valve core 17 and the axis of the accommodation cavity are coaxially arranged; the air connection valve core 20 includes a large cylindrical section and a small cylindrical section connected in sequence, the air connection valve core 20 is arranged in the accommodation cavity, and the air connection valve A valve core compression spring 21 is provided between one end surface of the large cylindrical section of the core 20 and the bottom of the accommodation cavity. The two ends of the valve core compression spring 21 are respectively in contact with the bottom of the accommodation cavity and the large cylindrical section of the valve core 20. On the end face of the valve core 20 , the other end, which is the small cylindrical section, penetrates the air pressure valve core 17 and is slidingly connected with it.

In a specific embodiment, as shown in Figures 4 and 5, a number of guide columns are threadedly connected to the flange section of the gas receiving part 18, and buffer springs 19 are set on the guide columns. The buffer springs 19 are One end is in contact with the upper surface of the flange of the air-contacting part 18, and the other end of the buffer spring 19 is in contact with the lower surface of the static ventilation plate, so that the upper ventilation part 9 is fixed on the static ventilation plate. The buffering effect reduces the collision wear of the upper ventilating part 9 when it is contacted by the lower ventilating part 8 for many times.

In a specific embodiment, as shown in Figures 4 and 5, the lower ventilation part 8 includes: a gas-connecting top core 14, a gas-connecting top core pressure ring 15 and an O-shaped sealing ring 16; the gas-connecting top core 14 is In the rotary body structure, a flange is integrally formed on the outer peripheral side wall of the middle position of the cylindrical section of the air-connecting ejector core 14. A columnar protrusion is provided on the upper surface of the air-connecting ejector core 14. The air-connecting ejector core pressure ring 15 It is an annular plate component. The gas-connecting ejector core pressing ring 15 is sleeved on the columnar protrusion and is fixedly connected to the gas-connecting ejector core 14. For example, the gas-connecting ejector core pressing ring 15 and the gas-connecting ejector core 14 can be connected by bolts. connection, the O-ring 16 is set on the top of the cylindrical protrusion located at the upper end of the flange of the gas-connecting top core 14; when the upper surface of the gas-connecting top core pressure ring 15 abuts against the lower surface of the gas-connecting pressure valve core 17 , the gas-connecting top core 14 presses the gas-connecting valve core 20, and the lower ventilation part 8 and the upper ventilation part 9 are connected. At this time, the O-ring 16 abuts on the lower surface of the gas-connecting pressure valve core 17 , to avoid the occurrence of air leakage, the gas will not enter the vacuum environment and will not destroy the vacuum environment. As shown in Figure 2, the dynamic ventilation assembly 2 includes a dynamic ventilation plate. The dynamic ventilation plate can be a rectangular plate-shaped part. At least two lower ventilation parts 8 are provided through the dynamic ventilation plate. For example, two lower ventilation parts The ventilating part 8 is fixed on the movable ventilating plate through bolts. The venting core 14 of the lower venting part 8 is set upward. The venting valve core 20 of the upper venting part 9 is directly connected to the venting core 14 and faces downward. Setting: The gas-connecting top core 14 and the gas-connecting piece 18 are both fixed with tracheal joints 13, and the tracheal joints 13 are used to connect to pipelines.

In the above-mentioned specific embodiment, the working process of the upper ventilation part 9 and the lower ventilation part 8 in cooperation with ventilation is: when the ventilation box 26 in the outer vacuum box 23 needs ventilation, the lower ventilation part 8 is raised and lowered. Under the action of the body transmission assembly 3, the moving ventilation plate rises until the air-connecting top core 14 is pressed onto the air-connecting valve core 20. At this time, the valve core compression spring 21 contracts, and the air-connecting valve core 20 opens. At this time, the downward change The air pipe on the air part 8 inlets or exhausts air, and the gas enters or discharges into the ventilation box 26 through the air receiving part 18; when the ventilation is completed, the lower ventilation part 8 follows the action of the lifting body transmission assembly 3. The air plate descends, and the air connecting top core 14 pressed on the air connecting valve core 20 separates from the air connecting valve core 20. At this time, the valve core compression spring 21 expands, the air connecting valve core 20 returns to the initial position, and the air connecting valve core 20 Close and stop ventilation.

In a specific embodiment, it also includes a ventilation plate fixing column 11. The ventilation plate fixing column 11 is a cylinder. One end of the ventilation plate fixing column 11 is fixed on the static ventilation plate. The upper end of the ventilation plate fixing column 11 is A flange plate is provided, and a plurality of circular holes can be opened on the flange plate at the upper end of the ventilation plate fixed column 11. One end of the ventilation plate fixed column 11 with the flange plate is fixed in the outer vacuum box 23 through bolt connection; It also includes a plurality of upright columns 12, which are fixed on the upper surface of the static ventilation plate. For example, the upright columns 12 can be four aluminum cylinders. In order to avoid the generation of electric sparks between the upright columns 12, the outer periphery of each upright column 12 is The side cover is provided with a silicone cover 10, and the stability of fixing the static ventilation board is improved by providing the uprights 12.

The beneficial effects in this embodiment are as follows: the lower ventilator 8 is raised and lowered to abut and compress the gas valve core 20 to open the gas valve core 20; the valve core compression spring 23 is used to close the gas valve core 20, Ensure the internal sealing of the ventilation box 26; that is, when the moving ventilation assembly 2 moves toward the static ventilation assembly 1, the lower ventilation component 8 is tightly connected to the gas valve core 20 due to the pressure (at this time, the valve core After the upper ventilation part 9 is opened (the compression spring 21 contracts), the upper ventilation part 9 and the lower ventilation part 8 are connected, and the inside of the ventilation box 26 is connected to the outside of the vacuum environment (specifically, the outside of the external vacuum box 23) Directly connected, thereby not causing damage to the vacuum environment; when the moving ventilation component 2 moves away from the static ventilation component 1, the lower ventilation component 8 releases the pressure of the docking gas valve core 20, causing the upper ventilation component 9 to move After closing, the ventilation box 26 will not communicate with the inside or outside of the vacuum environment, thereby achieving sealing of the ventilation box 26 and not causing damage to the vacuum environment. The O-ring 16 is used between the upper ventilation part 9 and the lower ventilation part 8 to avoid damaging the seal and avoiding air leakage, so as to achieve the purpose of ventilation in the box without destroying the vacuum environment and ensure the productivity. , the mechanism design is lightweight to ensure the stability of the equipment; by setting the buffer spring 19, the wear of the lower ventilation part 8 due to multiple collisions of the upper ventilation part 9 can be avoided, while ensuring the structural stability of the lower ventilation part 9, It can prevent the gas in the ventilation box 26 from leaking into the outer vacuum box 23, thereby ensuring that the vacuum environment is not destroyed.

Example 3

This embodiment includes all the technical features of Embodiment 2. On this basis, as shown in Figures 6 to 8, the lifting body transmission assembly 3 includes: a transmission shaft 4, a fixed seat 7, a lifting block 5 and an eccentric wheel 6; The shaft 4 penetrates the outer vacuum box 23; the end of the transmission shaft 4 located in the outer vacuum box 23 is fixedly connected to an eccentric wheel 6, the outer circumferential side of the eccentric wheel 6 is provided with a lifting block 5, and a fixed seat 7 is fixed in the outer vacuum box 23. The fixed seat 7 is provided with a groove, and the lifting block 5 is arranged in the groove and is slidingly connected to the fixed base 7; the transmission shaft 4 is rotationally connected to the external vacuum box 23 through the magnetic fluid 27.

Specifically, the transmission shaft 4 is fixed on the servo motor 22 through a universal shaft coupling. The transmission shaft 4 is a cylindrical shaft. The transmission shaft 4 and the eccentric wheel 6 are fixed together through excessive fit and key connection. The lifting block 5 can It has a square block structure, and a square hole is provided on the lifting block 5. The square hole is set on the outer peripheral side of the eccentric wheel 6. The two sides of the eccentric shaft on the transmission shaft 4 are rotationally connected through bearings and fixed seats 7. The fixed seats 7 is fixed in the outer vacuum box 23 through bolt connection.

As shown in Figure 6, the working process of this embodiment is that the servo motor 22 rotates and drives the eccentric wheel 6 to rotate through the transmission shaft 4. The eccentric effect of the eccentric wheel 6 drives the lifting block 5 to reciprocate up and down on the fixed seat 7. , the dynamic ventilation component 2 fixed on the lifting block 5 then reciprocates up and down. When the dynamic ventilation component 2 moves upward to cooperate with the static ventilation component 1, the two lower ventilation components 8 are respectively connected with the two upper ventilation components. The ventilation parts 9 are connected. One group of lower ventilation parts 8 passes the gas through the upper ventilation parts 9 and then discharges it into the ventilation box 26 through the air inlet pipe 24. The other set of upper ventilation parts 9 passes the gas through the lower ventilation parts 9. The ventilation component 8 is then discharged from the ventilation box 26 through the air outlet pipe 25; when the ventilation is completed, the dynamic ventilation component 2 moves downward with the lifting block 5 and gradually moves away from the static ventilation component 1, and the lower ventilation component 8 and The upper ventilation part 9 is detached, the valve core is closed, and the ventilation is completed.

The beneficial effects in this embodiment are: the servo motor 22 drives the eccentric wheel 6 to rotate smoothly and accurately, ensuring that it can hit the valve core every time. The eccentric wheel 6 saves design costs compared with cams, etc., and the air-contacting part 18 is small and sensitive, maximizing the It saves space. Through the arrangement of the magnetic fluid 27, the transmission shaft 4 does not affect the vacuum environment inside the outer vacuum box 23 during the rotation process, and has better sealing performance.

The above specific examples are used to illustrate the present invention, which are only used to help understand the present invention and are not intended to limit the present invention. For those skilled in the technical field to which the present invention belongs, several simple deductions, modifications or substitutions can be made based on the ideas of the present invention.

Claims (10)

1. A ventilation mechanism in a box under a vacuum environment, which is characterized by including: The static ventilation component (1) can be fixedly installed in the external vacuum box (23). The static ventilation component (1) includes an upper ventilation component (9), and the upper ventilation component (9) is used to communicate with the external vacuum box (23). The ventilation box (26) provided in the external vacuum box (23) is connected; and A dynamic ventilation assembly (2) can move toward and away from the static ventilation assembly (1). The dynamic ventilation assembly (2) includes a lower ventilation component (8), and the lower ventilation component (8) For external communication with the external vacuum box (23); The dynamic ventilation component (2) moves toward the static ventilation component (1), so that when the lower ventilation component (8) abuts the upper ventilation component (9), the lower ventilation component (9) The component (8) is connected to the upper ventilation component (9), and is used to communicate the ventilation box (26) with the outside of the outer vacuum box (23). 2. The ventilation mechanism in the box under vacuum environment according to claim 1, characterized in that the number of the upper ventilation parts (9) and the lower ventilation parts (8) is set to multiple. Each of the lower ventilating parts (8) and the plurality of upper ventilating parts (9) can contact and communicate with each other one by one; wherein: At least one set of the upper ventilation part (9) and the lower ventilation part (8) that are connected are used to discharge the gas in the ventilation box (26) to the outer vacuum box (23). Externally, at least another set of the upper ventilation part (9) and the lower ventilation part (8) that are connected is used for the gas outside the external vacuum box (23) to enter the ventilation box ( 26). 3. The ventilation mechanism in the box under vacuum environment according to claim 1, characterized in that the upper ventilation part (9) includes an air-connecting and pressing valve core (17), an air-connecting part (18) and an air-connecting part. Valve core (20), the air connection part (18) is used to communicate with the ventilation box (26) through the tracheal joint (13), and the air connection pressing valve core (17) is fixedly connected to the air connection At the other end of the component (18), the gas-connecting valve core (20) is arranged in the gas-connecting component (18), and the gas-connecting valve core (20) penetrates the gas-connecting compression valve core (17) and Slidingly connected to the air-connected compression valve core (17); When the lower ventilation part (8) abuts the air-connecting compression valve core (17), the air-connecting valve core (20) is pressed into the air-connecting part (18). (8) is connected to the upper ventilation part (9). 4. The ventilation mechanism in the box under vacuum environment according to claim 3, characterized in that the upper ventilation part (9) also includes a valve core compression spring (21), and the air receiving part (18) is opened There is an accommodating cavity, the gas connecting and pressing valve core (17) covers the accommodating cavity, the gas connecting valve core (20) is arranged in the accommodating cavity, one end of the gas connecting valve core (20) and the The valve core compression spring (21) is disposed between the bottoms of the accommodation chamber, and the other end of the gas connection valve core (20) penetrates the gas connection compression valve core (17). 5. The ventilation mechanism in the box under vacuum environment according to claim 3, characterized in that the lower ventilation part (8) includes an air-connecting top core (14), and the air-connecting top core (14) is made of It is connected to the outside of the external vacuum box (23) through the tracheal joint (13); the gas-connecting top core (14) is also used to press the gas-connecting valve core (20) into the gas-connecting piece (20). 18), so that the lower ventilation part (8) and the upper ventilation part (9) are connected. 6. The ventilation mechanism in the box under vacuum environment according to claim 5, characterized in that the lower ventilation part (8) also includes a gas-connecting top core pressure ring (15) and an O-shaped sealing ring (16) , the air-connecting top core (14) is provided with a columnar protrusion, and the air-contacting top core pressure ring (15) is sleeved on the columnar protrusion and is fixedly connected to the air-contacting top core (14); The O-shaped sealing ring (16) is sleeved on the top of the cylindrical protrusion; when the gas-connecting top core pressure ring (15) abuts the gas-connecting compression valve core (17), the gas-connecting top core pressure ring (15) The top core (14) presses the air-connecting valve core (20) into the air-connecting piece (18), and the O-ring seal (16) abuts the air-connecting valve core (17). 7. The ventilation mechanism in the box in a vacuum environment according to any one of claims 1-6, characterized in that it also includes a lifting body transmission assembly (3), and the lifting body transmission assembly (3) is used to penetrate The outer vacuum box (23), the lifting body transmission assembly (3) is connected to the dynamic ventilation assembly (2) at one end inside the outer vacuum box (23); the lifting body transmission assembly (3) It is also used to push the moving ventilation assembly (2) to move toward and away from the static ventilation assembly (1). 8. The ventilation mechanism in the box under vacuum environment according to claim 7, characterized in that the lifting body transmission assembly (3) includes a transmission shaft (4), a fixed seat (7), a lifting block (5) and a The eccentric wheel (6), the transmission shaft (4) is used to penetrate the outer vacuum box (23), and the fixing seat (7) is used to be fixed in the outer vacuum box (23); One end of the transmission shaft (4) located in the outer vacuum box (23) is fixedly connected to the eccentric wheel (6), the lifting block (5) is sleeved on the eccentric wheel (6), and the The lifting block (5) is slidingly connected to the fixed seat (7), and the dynamic ventilation assembly (2) is fixed on the lifting block (5). 9. The ventilation mechanism inside the box in a vacuum environment according to claim 8, characterized in that the transmission shaft (4) is rotatably connected to the outer vacuum box (23) through magnetic fluid (27). 10. The ventilation mechanism in the box under vacuum environment according to claim 7, characterized in that the static ventilation assembly (1) further includes a static ventilation plate, and the static ventilation plate is used to be fixedly arranged on the Inside the external vacuum box (23), the upper ventilation part (9) is provided through the static ventilation plate, and a buffer is provided between the static ventilation plate and the upper ventilation part (9). spring(19); and / or The movable ventilation assembly (2) also includes a movable ventilation plate, the lower ventilation part (8) is disposed through the movable ventilation plate, and the movable ventilation plate and the lifting body transmission assembly (3 )connect.