A vacuum air extraction valve assembly

Abstract

The utility model relates to a vacuum air extraction valve field, concretely relates to a vacuum air extraction valve assembly, including the casing, the inner wall of casing is opened with the air outlet hole, the air inlet hole and the valve hole, the inner wall screw thread connection of air outlet hole has the quick -joint no.

Description

Technical Field

[0001] This utility model relates to the field of vacuum pumping valves, and specifically to a vacuum pumping valve assembly. Background Technology

[0002] Vacuum pumping valves are indispensable key control components in vacuum systems, primarily installed between the vacuum chamber and the vacuum pump assembly. When the valve is open, it provides the necessary evacuation channel for the vacuum pump to extract gas from the chamber; when the valve is closed, the valve core seals the valve opening, effectively isolating the vacuum chamber from the vacuum pump and preventing gas flow. In this process, the movable valve core inside the valve body is the core component responsible for performing the isolation action and sealing the airflow channel. However, most current pumping valves are currently integrally molded, and their internal valve core cannot be easily disassembled, causing inconvenience for subsequent maintenance.

[0003] For example, Chinese Patent Publication No. CN219198322U discloses a superconducting magnet vacuum pumping valve. In this patent, the sealing ring, after being installed in the sealing groove, deforms under the pressure of the clamping member, thereby abutting against the piston rod and ensuring the sealing performance when the piston rod slides within the through hole. Simultaneously, the sealing ring is limited to its position within the sealing groove under the action of the clamping member, reducing the risk of synchronous sliding between the sealing ring and the piston rod.

[0004] After prolonged use, the piston or sealing ring on the valve plate of a vacuum valve will wear, age, or even break due to long-term friction. Currently, most vacuum valves, to ensure structural strength and sealing integrity, typically employ a one-piece molded valve body design, permanently encapsulating internal components such as the valve core within it, as shown in the patent disclosed above. This structure makes it impossible to easily disassemble the internal valve core for maintenance or replacement. The most efficient solution currently is to replace the entire valve body, but this results in material waste and increased operating costs. Therefore, it is necessary to invent a vacuum valve assembly to solve these problems. Utility Model Content

[0005] The purpose of this invention is to provide a vacuum pumping valve assembly. By setting a handle, a connecting block, and a connecting rod, the insertion rod can be slid on the inner wall of the end cover, thereby allowing the insertion rod to be inserted into or pulled out of the insertion hole. When the insertion rod is removed from the insertion hole, the end cover can be disassembled so that the valve disc can be removed from the valve hole to replace the sealing ring. When the insertion rod is inserted into the insertion hole, the end cover can be axially limited, thus fixing the end cover inside the valve hole. This solves the problem that the valve core is not easy to disassemble due to the one-piece molding of the valve body, which means that the entire valve body must be replaced after the seal wears out.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a vacuum pumping valve assembly, comprising: A housing, wherein an inner wall of the housing is provided with an air outlet hole, an air inlet hole and a valve hole, an inner wall of the air outlet hole is threadedly connected with a first quick connector, and an inner wall of the air inlet hole is threadedly connected with a second quick connector; An end cover, wherein the end cover is clamped on an inner wall of the valve hole, a push rod penetrates through and is slidably connected to an inner wall of the end cover, a valve disc is fixedly connected to a bottom end of the push rod, a sealing ring is clamped on an outer wall of the valve disc, and a spring is fixedly connected to a top of the valve disc; A limiting assembly, wherein the limiting assembly comprises an insertion rod, the insertion rod penetrates through and is slidably connected to an inner wall of the end cover, an insertion hole for the insertion rod to insert into is radially formed on an inner wall of the valve hole, a handle is hinged to an inner wall of the end cover, a connecting block is fixedly connected to an outer wall of the handle, a connecting rod is hinged to an outer wall of the connecting block, and a torsion spring is arranged at a hinged position of the handle and the end cover.

[0007] Preferably, the insertion rod is a "-shaped rod structure, and an end of the connecting rod away from the connecting block is hinged to an outer wall of the insertion rod.

[0008] Preferably, a sealing ring is clamped at a bottom of the end cover, and the sealing ring can seal a joint between the end cover and the valve hole.

[0009] Preferably, a diameter of the sealing ring is larger than an inner wall diameter of the air inlet hole, when the valve disc is inserted into an inner wall of the air inlet hole, the sealing ring is elastically deformed and makes interference contact with an inner wall of the air inlet hole to realize sealing.

[0010] Preferably, the air inlet hole and the valve hole are coaxially arranged, the valve hole is located at a top of the air inlet hole, a bottom of the air inlet hole is of an open structure, a top of the valve hole is of an open structure, an interior of the air outlet hole communicates with an interior of the valve hole, a central axis of the air outlet hole is perpendicular to a central axis of the valve hole, and a right end of the air outlet hole is of an open structure.

[0011] Preferably, an annular groove is formed on an outer circumferential surface of the valve disc, and the sealing ring is arranged in the annular groove and clamped with the annular groove.

[0012] In the above technical solution, the technical effects and advantages provided by the present utility model are: In the present utility model, through the design of the limiting assembly, rapid disassembly and assembly of the end cover can be realized. By disassembling and assembling the end cover, the valve disc can be easily taken out of the valve hole or installed inside the valve hole, so that the sealing ring can be replaced in time after being worn or aged, which improves the convenience of later maintenance, and there is no need to replace the entire valve body, effectively reducing the use cost; through the design of the sealing ring, the valve disc can effectively block the air inlet hole, so as to ensure that the vacuum chamber maintains a vacuum state. Meanwhile, the sealing ring can seal the joint between the end cover and the valve hole, so as to ensure the stable operation of the vacuum pumping system. Description of Drawings

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a cross-sectional structural diagram of the shell of this utility model; Figure 3 This utility model Figure 2 A magnified structural diagram at point A; Figure 4 This is a schematic diagram of the overall structure of the end cap of this utility model; Figure 5 This utility model Figure 4 A schematic diagram of the structure viewed from below.

[0015] Legend: 1. Housing; 2. End cap; 3. Limiting assembly; 31. Insert rod; 32. Insertion hole; 33. Handle; 34. Connecting block; 35. Connecting rod; 36. Torsion spring; 4. Air outlet; 5. Air inlet; 6. Valve hole; 7. Quick connector one; 8. Quick connector two; 9. Push rod; 10. Valve disc; 11. Sealing ring; 12. Spring; 13. Sealing ring. Detailed Implementation

[0016] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0017] This utility model provides, for example Figure 1 - Figure 3 The vacuum pumping valve assembly shown includes a housing 1, an end cap 2, and a limiting assembly 3; The inner wall of the housing 1 is provided with an air outlet 4, an air inlet 5, and a valve hole 6. The air inlet 5 and the valve hole 6 are coaxially arranged. The valve hole 6 is located at the top of the air inlet 5. The bottom of the air inlet 5 is an open structure. The top of the valve hole 6 is an open structure. The interior of the air outlet 4 is connected to the interior of the valve hole 6. The central axis of the air outlet 4 is perpendicular to the central axis of the valve hole 6. The air outlet 4 is connected to the interior of the air inlet 5 through the valve hole 6. Thus, the vacuum chamber can be evacuated using the valve hole 6, the air inlet 5, the quick connector 2 8, and the pipe connected to them. The right end of the air outlet 4 is an open structure. When the vacuum pump is started, it extracts the air inside the air outlet 4 through the pipe. The inner wall of the air outlet 4 is threaded with a quick connector 1 7. The inner wall of the air inlet 5 is threaded with a quick connector 2 8. The quick connector 1 7 is connected to the vacuum pump through the pipe. The quick connector 2 8 is connected to the vacuum chamber through the pipe. End cap 2 is snapped onto the inner wall of valve hole 6. Push rod 9 is slidably connected through the inner wall of end cap 2. Valve disc 10 is fixedly connected to the bottom end of push rod 9. The push rod 9 can drive valve disc 10 to slide on the inner wall of valve hole 6, thereby controlling the opening or closing of air inlet 5. Sealing ring 11 is snapped onto the outer wall of valve disc 10. Sealing ring 11 can seal the connection between valve disc 10 and air inlet 5, thereby ensuring that the vacuum chamber is kept in a vacuum state. Spring 12 is fixedly connected to the top of valve disc 10. Under the elastic action of spring 12, valve disc 10 can always be pressed against the inner wall of air inlet 5. like Figure 3 - Figure 5 As shown, the limiting component 3 includes a rod 31 that passes through and is slidably connected to the inner wall of the end cap 2. The inner wall of the valve hole 6 has a radially opened insertion hole 32 for inserting the rod 31. A handle 33 is hinged to the inner wall of the end cap 2. The handle 33 can not only control the fixed or disassembled state of the end cap 2, but also allow the end cap 2 to be removed from the valve hole 6. A connecting block 34 is fixedly connected to the outer wall of the handle 33, and a connecting rod 35 is hinged to the outer wall of the connecting block 34. The connecting rod 35 is located away from the connecting block 34. The handle 33 is hinged to the outer wall of the insertion rod 31. Rotating the handle 33 causes it to flip upward on the inner wall of the end cover 2. At the same time, the connecting block 34 and the connecting rod 35 can drive the insertion rod 31 to be inserted into or removed from the insertion hole 32. A torsion spring 36 is provided at the hinge between the handle 33 and the end cover 2. Rotating the handle 33 causes it to gradually flip upward on the inner wall of the end cover 2. At this time, the handle 33 will gradually compress the torsion spring 36. When the handle 33 is released, the previously compressed torsion spring 36 will drive the handle 33 to rotate downward and reset.

[0018] like Figure 4 As shown, the insertion rod 31 is a rod-shaped structure. When the insertion rod 31 is inserted into the insertion hole 32, the insertion rod 31 and the insertion hole 32 can be used to limit the end cover 2 axially, thereby fixing the end cover 2 inside the valve hole 6.

[0019] like Figure 3 and Figure 5 As shown, a sealing ring 13 is snapped into the bottom of the end cap 2. The sealing ring 13 can seal the connection between the end cap 2 and the valve hole 6. The sealing of the connection between the end cap 2 and the valve hole 6 by the sealing ring 13 can ensure the stable operation of the air extraction system.

[0020] like Figure 2As shown, an annular groove is formed on the outer circumferential surface of the valve disc 10. The sealing ring 11 is disposed in the annular groove and engages with it. The sealing ring 11 is removed from the annular groove on the outer circumferential surface of the valve disc 10, and a new sealing ring 11 is inserted back into the annular groove on the outer circumferential surface of the valve disc 10 to replace the sealing ring 11. The diameter of the sealing ring 11 is larger than the inner wall diameter of the air inlet 5. When the valve disc 10 is inserted into the inner wall of the air inlet 5, the sealing ring 11 deforms elastically and makes interference contact with the inner wall of the air inlet 5 to achieve a seal. When the valve disc 10 is inserted downward into the air inlet 5, the sealing ring 11 will be deformed by the pressure of the inner wall of the air inlet 5. At this time, the deformed sealing ring 11 can seal the connection between the valve disc 10 and the air inlet 5, thereby ensuring that the vacuum chamber maintains a vacuum state.

[0021] The working principle of this utility model is as follows: Quick connector 1 7 is connected to the vacuum pump through a pipe, and quick connector 2 8 is connected to the vacuum chamber through a pipe. In use, the push rod 9 needs to be pulled upward to slide upward on the inner wall of the end cover 2. At the same time, the push rod 9 will drive the valve disc 10 to move upward synchronously until the valve disc 10 disengages from the air inlet 5 and moves to the top of the air outlet 4. Then, the vacuum pump is started to extract the air from the air outlet 4 through the pipe. At this time, the air outlet 4 will be connected to the inside of the air inlet 5 through the valve hole 6. Thus, the vacuum chamber can be evacuated using the valve hole 6, the air inlet 5, the quick connector 2 8, and the connected pipe. After evacuation, the push rod 9 can be pushed downward to slide downward on the inner wall of the end cover 2 until the push rod 9 drives the valve disc 10 downward to insert into the inside of the air inlet 5. At this time, under the elastic action of the spring 12, the valve disc 10 can always be pressed against the inner wall of the air inlet 5. At the same time, the sealing ring 11 can seal the connection between the valve disc 10 and the air inlet 5, thus ensuring that the vacuum chamber is kept in a vacuum state.

[0022] When the sealing ring 11 is worn and needs to be replaced, rotate the two sets of handles 33 so that they gradually flip upwards to a vertical position on the inner wall of the end cover 2. At the same time, the handles 33 will gradually compress the torsion spring 36 and drive the connecting block 34 to pull the connecting rod 35, so that the connecting rod 35 pulls the insertion rod 31. At this time, the insertion rod 31 will slide on the inner wall of the end cover 2 and gradually move out of the inside of the insertion hole 32. When the insertion rod 31 is completely moved out of the inside of the insertion hole 32, the restriction on the end cover 2 can be released. At this time, the end cover 2, the push rod 9 and the valve plate 10 can be taken out from the inside of the valve hole 6. Then, the sealing ring 11 can be taken out from the annular groove on the outer circumference of the valve plate 10, and the new sealing ring 11 can be inserted into the annular groove on the outer circumference of the valve plate 10. After the sealing ring 11 is replaced, the valve disc 10 and end cover 2 need to be installed. First, rotate the two sets of handles 33 so that they gradually flip upward on the inner wall of the end cover 2. At the same time, the connecting block 34 and the connecting rod 35 can drive the insertion rod 31 to slide on the inner wall of the end cover 2 and gradually approach the handle 33. When the end of the insertion rod 31 is fully inserted into the end cover 2... After inserting the valve disc 10 into the valve hole 6, insert the end cap 2 into the valve hole 6, press the end cap 2 to compress the sealing ring 13, and rotate the end cap 2 to align the insertion rod 31 with the insertion hole 32. Then release the handle 33. At this time, the previously compressed torsion spring 36 will drive the handle 33 to rotate downwards to reset. At the same time, the handle 33 will drive the connecting block 34 to push the connecting rod 35, so that the connecting rod 35 pushes the insertion rod 31, thereby allowing the insertion rod 31 to be inserted into the insertion hole 32. At this time, the insertion rod 31 and the insertion hole 32 can be used to axially limit the end cap 2, thereby fixing the end cap 2 inside the valve hole 6. Thus, the installation of the end cap 2 and the valve disc 10 is completed.

[0023] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A vacuum pumping valve assembly, characterized in that, include: The housing (1) has an air outlet (4), an air inlet (5) and a valve hole (6) on its inner wall. The inner wall of the air outlet (4) is threaded with a quick connector one (7), and the inner wall of the air inlet (5) is threaded with a quick connector two (8). End cap (2), the end cap (2) is snapped into the inner wall of valve hole (6), the inner wall of the end cap (2) is slidably connected to push rod (9), the bottom end of push rod (9) is fixedly connected to valve disc (10), the outer wall of valve disc (10) is snapped with sealing ring (11), and the top of valve disc (10) is fixedly connected to spring (12). The limiting component (3) includes a plug rod (31), which is slidably connected to the inner wall of the end cap (2). The inner wall of the valve hole (6) is radially provided with a plug hole (32) for inserting the plug rod (31). The inner wall of the end cap (2) is hinged with a handle (33). The outer wall of the handle (33) is fixedly connected with a connecting block (34). The outer wall of the connecting block (34) is hinged with a connecting rod (35). A torsion spring (36) is provided at the hinge point between the handle (33) and the end cap (2).

2. The vacuum pumping valve assembly according to claim 1, characterized in that: The insertion rod (31) is a rod-shaped structure with the end of the connecting rod (35) away from the connecting block (34) hinged to the outer wall of the insertion rod (31).

3. The vacuum pumping valve assembly according to claim 1, characterized in that: The bottom of the end cap (2) is fitted with a sealing ring (13), which can seal the connection between the end cap (2) and the valve hole (6).

4. A vacuum pumping valve assembly according to claim 1, characterized in that: The diameter of the sealing ring (11) is larger than the inner wall diameter of the air inlet (5). When the valve disc (10) is inserted into the inner wall of the air inlet (5), the sealing ring (11) elastically deforms and makes interference contact with the inner wall of the air inlet (5) to achieve sealing.

5. A vacuum pumping valve assembly according to claim 1, characterized in that: The air inlet (5) and the valve hole (6) are coaxially arranged. The valve hole (6) is located at the top of the air inlet (5). The bottom of the air inlet (5) is an open structure. The top of the valve hole (6) is an open structure. The interior of the air outlet (4) is connected to the interior of the valve hole (6). The central axis of the air outlet (4) is perpendicular to the central axis of the valve hole (6). The right end of the air outlet (4) is an open structure.

6. A vacuum pumping valve assembly according to claim 1, characterized in that: The outer circumferential surface of the valve disc (10) is provided with an annular groove, and the sealing ring (11) is disposed in the annular groove and engaged with the annular groove.

Images