A vacuum valve suitable for various specifications of vacuum connectors based on modular design

Abstract

This utility model discloses a modularly designed vacuum valve adaptable to various specifications of vacuum connectors, belonging to the field of pipeline vacuum technology. It is used to connect vacuum connectors on vacuum pipelines and includes a valve core disassembly assembly and a connector assembly. The valve core disassembly assembly and the connector assembly are detachably and sealingly connected. The connector assembly and the vacuum connector are detachably and sealingly connected. The valve core disassembly assembly is used to install and disassemble the vacuum valve core within the vacuum connector. The valve core disassembly assembly is provided with a vacuum connection pipe for connecting a vacuum pumping device to evacuate the vacuum pipeline. This utility model discloses a modularly designed vacuum valve adaptable to various specifications of vacuum connectors, effectively solving the problems of existing vacuum valves being unable to match different vacuum connector sizes, and the difficulty of manually removing the valve core, which is prone to damage due to uneven force or excessive force.

Description

Technical Field

[0001] This utility model relates to the field of pipeline vacuum technology, specifically to a vacuum valve based on modular design that is compatible with various specifications of vacuum connectors. Background Technology

[0002] In the maintenance and operation of LNG (liquefied natural gas) related equipment, vacuuming the vacuum pipes or vacuum pump pool is a key step to ensure the normal operation of the equipment. Its ease of operation, component compatibility and equipment sealing performance directly affect the overall work efficiency and operational safety.

[0003] Currently, the matching of vacuum connectors and vacuum valves used in LNG vacuum pipe or vacuum pump pool evacuation operations has significant limitations. Specifically, although vacuum connectors from different manufacturers may have similar shapes, their outer diameters vary significantly. This means that existing vacuum valves can typically only be matched with specific models of vacuum connectors; that is, one type of vacuum valve corresponds to one type of vacuum connector. This single model correspondence means that operators, if unsure of the corresponding vacuum valve model for each type of vacuum connector, often need to carry multiple different models of vacuum valves to avoid operational errors. This not only increases the overall weight of the tools but also causes inconvenience in transportation and on-site handling. Furthermore, the current method of removing the valve core from the vacuum connector also has significant flaws. Currently, the valve core is commonly extracted from the vacuum connector using a screw, but because a certain degree of vacuum may still remain inside the equipment before evacuation (i.e., the vacuum has not completely failed), the valve core will be tightly adhered to the inside of the connector under the vacuum force. At this point, the operator needs to apply significant external force to manually pull out the valve core using the screw. This not only significantly increases the difficulty of operation and the physical demands on the operator, but also makes it easier for the valve core to be damaged (e.g., scratches on the valve core surface, deformation of the sealing surface, etc.) or for the screw to bend and deform due to uneven force or excessive force during operation. Damage to these components will directly affect the overall sealing performance of the vacuum connector and the equipment, leading to air leakage during vacuuming, thereby reducing vacuuming efficiency, and even requiring the replacement of damaged components, increasing equipment maintenance costs and downtime.

[0004] Therefore, in the existing LNG vacuum pipe and vacuum pump pool vacuuming operations, the matching limitations of vacuum connectors and vacuum valves, as well as the unreasonable valve core removal methods, have become important factors restricting the ease of operation, equipment reliability, and work efficiency. It is necessary to propose a vacuum valve based on modular design that can adapt to various specifications of vacuum connectors to solve the above problems. Utility Model Content

[0005] To address the problems existing in the prior art, this utility model provides a modularly designed vacuum valve adaptable to various vacuum connector sizes, aiming to solve the problems that existing vacuum valves cannot be matched with different vacuum connector sizes; and that manually removing the valve core is difficult and prone to damage due to uneven or excessive force. To achieve the above objectives, this utility model provides the following technical solution:

[0006] A modularly designed vacuum valve adaptable to various specifications of vacuum connectors is provided for connecting vacuum connectors on a vacuum pipeline. The valve valve assembly includes a valve core disassembly assembly and a connector assembly. The valve core disassembly assembly and the connector assembly are detachably and sealingly connected. The connector assembly and the vacuum connector are detachably and sealingly connected. The valve core disassembly assembly is used to install and disassemble the vacuum valve core within the vacuum connector. The valve core disassembly assembly is provided with a vacuum connection pipe for connecting a vacuum pumping device to evacuate the vacuum pipeline.

[0007] Furthermore, the valve core disassembly assembly includes a fixing plate, a guide plate, and a valve core fixing component; the fixing plate has symmetrically arranged screws on its upper ends on both sides; the guide plate has two through holes at corresponding positions for the two screws to pass through; each screw has two working nuts, located above and below the guide plate respectively; both the guide plate and the fixing plate have round holes in their middle sections, which are vertically aligned; the valve core fixing component is used to connect the valve core, passing through the round holes on the guide plate and the fixing plate sequentially from above the guide plate, and is rotatable relative to the guide plate and the fixing plate.

[0008] Furthermore, the valve core fixing component includes an upper clamping plate, a lower clamping plate, and a pull-out screw; the lower clamping plate is provided with a connecting post; the diameter of the connecting post is smaller than the diameter of the circular hole in the middle of the guide plate; the upper clamping plate is provided with a threaded hole at a corresponding position; the upper clamping plate and the lower clamping plate are fixed by bolts, restricting the guide plate between the upper clamping plate and the lower clamping plate, while the upper clamping plate and the lower clamping plate can rotate relative to the guide plate; the pull-out screw is fixed at the lower end of the lower clamping plate and passes through the circular hole on the fixing plate.

[0009] Furthermore, the fixed plate has an upper connecting threaded connector on its circular hole; the upper connecting threaded connector has a through hole with a diameter equivalent to that of the fixed plate's circular hole and is coaxially arranged with the fixed plate's circular hole; a clamping nut is threadedly connected to the top of the upper connecting threaded connector.

[0010] Furthermore, the gap between the pull-out screw and the upper connecting threaded joint is provided with a first copper washer, a first sealing ring, a second copper washer, and a first sealing ring in sequence from top to bottom; when the clamping nut is rotated to connect the upper connecting threaded joint, it presses the first copper washer, the sealing ring, the second copper washer, and the sealing ring together to form a seal.

[0011] Furthermore, the lower end of the fixing plate is integrally provided with a tee pipe; the tee pipe includes a vertical upper connector and a lower connector and a horizontal connector; the upper connector is connected to the fixing plate; the lower connector of the tee pipe is provided with a lower connecting threaded connector; the connector assembly includes a first connector and a second connector; the first connector is provided with an external thread that mates with the lower connecting threaded connector.

[0012] Furthermore, the lower connecting threaded joint is provided with a sealing groove, and a sealing gasket is provided in the sealing groove.

[0013] Furthermore, the size of the second connector is equivalent to the size of the vacuum connector on the corresponding vacuum pipeline; the second connector is provided with several layers of sealing grooves, and each sealing groove is provided with a second sealing ring.

[0014] Furthermore, the vacuum connection pipe is integrally connected to the horizontal joint of the tee pipe, and is used to connect a vacuum device to evacuate the vacuum pipe.

[0015] Furthermore, the pull-out screw extends to a lower connected threaded joint; the vacuum valve core is provided with a threaded connection hole; the pull-out screw is fixedly connected to the vacuum valve core by cooperating with the threaded connection hole.

[0016] The beneficial effects of this utility model are:

[0017] 1. This utility model sets the vacuum valve as a standardized valve core disassembly assembly and a non-standardized connector assembly. By setting multiple connector assemblies, the size of the second connector is matched with different vacuum connector sizes. The first connector can be sealed and connected with the standardized valve core disassembly assembly, which reduces the weight of tools that need to be carried for each operation, thereby reducing transportation difficulty and improving operation efficiency.

[0018] 2. This utility model utilizes a fixed plate with twin screws and a guide plate. By operating the nut to pull the guide plate, the pull screws are driven to extract the vacuum valve core. The twin screws ensure smooth extraction, eliminating the difficulty for operators when manually removing the valve core and preventing damage. Attached Figure Description

[0019] Fig. 1 This is a schematic diagram of the structure of this utility model;

[0020] Fig. 2 This is a cross-sectional schematic diagram of the valve core disassembly assembly of this utility model;

[0021] Fig. 3 This is a cross-sectional schematic diagram of the connector assembly of this utility model;

[0022] Fig. 4 This is a cross-sectional view of the overall structure of the A-type connector assembly used in this utility model;

[0023] Fig. 5 This is a schematic cross-sectional view of the A-type connector assembly of this utility model connected to the A-type vacuum pipe;

[0024] Fig. 6 This is a cross-sectional view of the overall structure of the B-type connector assembly used in this utility model;

[0025] Fig. 7 This is a schematic cross-sectional view of the B-type connector assembly of this utility model connecting to the B vacuum pipe;

[0026] The attached figures are labeled as follows: 101, valve core disassembly assembly; 102, connector assembly; 201, guide plate; 202, upper clamping plate; 203, bolt; 204, actuating nut; 205, lower clamping plate; 206, screw; 207, clamping nut; 208, first copper washer; 209, first sealing ring; 210, second copper washer; 211, lower connecting threaded connector; 212, sealing gasket; 213, tee pipe; 214, vacuum connection pipe; 215, upper connecting threaded connector; 216, fixing plate; 217, pull-out screw; 301, first connector; 302, second connector; 303, second sealing ring; 401, A connector assembly; 501, B connector assembly; 601, A vacuum valve core; 602, A vacuum connector; 603, A vacuum pipe; 701, B vacuum valve core; 702, B vacuum connector; 703, B vacuum pipe. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but the present invention is not limited to the following embodiments.

[0028] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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 of this utility model.

[0029] In the description of this utility model, "first feature" and "second feature" may include one or more of the features.

[0030] In the description of this utility model, "multiple" means two or more.

[0031] In the description of this utility model, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0032] In the description of this utility model, the terms "above", "over" and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicating that the first feature is at a higher horizontal level than the second feature.

[0033] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," and "some examples" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0034] Example

[0035] See attached Figs. 1-7 This utility model discloses a modularly designed vacuum valve adaptable to various specifications of vacuum connectors. It comprises two parts: a valve core disassembly assembly 101 and a connector assembly 102. The two parts are connected by threads to achieve a detachable, sealed fit. The valve core disassembly assembly 101 is used for installing and removing the vacuum valve core within the vacuum connector and integrates a vacuum connection pipe 214 for direct connection to an external vacuum device (such as a vacuum pump). The connector assembly 102 is used to connect to the vacuum connector on the vacuum pipe. The connector assembly 102 can be configured to accommodate different vacuum connector sizes, achieving compatibility with vacuum connectors from different manufacturers and of different sizes. The vacuum valve is disassembled into a valve core disassembly assembly 101 and a connector assembly 102. When operation is required, only one valve core disassembly assembly 101 and several connector assemblies 102 of different sizes need to be carried, which reduces the transportation weight compared to the prior art. The lower end of the valve core disassembly assembly 101 is connected to the upper end of the connector assembly 102 by a threaded seal, and the lower end of the connector assembly 102 is connected to the vacuum connector on the vacuum pipeline by a sealing structure to achieve a detachable seal. The whole assembly forms a sealed passage of "valve core disassembly assembly 101-connector assembly 102-vacuum connector" to ensure that there is no air leakage during the vacuuming process.

[0036] In this embodiment, the valve core disassembly assembly 101 includes a fixing plate 216, a guide plate 201, a valve core fixing component, a screw 206, an actuating nut 204, an upper connecting threaded connector 215, a clamping nut 207, and a tee pipe 213, etc. The fixing plate 216 can be a rectangular metal plate, and its function is to provide an installation base for the entire valve core disassembly assembly 101. Two screws 206 are symmetrically welded to the upper ends of both sides of the fixing plate 216. The screws 206 are perpendicular to the fixing plate 216 to ensure the stability of the guide plate 201 when it moves vertically along the screws 206. A circular hole is opened in the middle of the fixing plate 216 for the pull screw 217 of the valve core fixing component to pass through. The upper connecting threaded connector 215 is fixed to the upper edge of the circular hole by welding. The guide plate 201 is a rectangular metal plate that matches the size of the fixing plate 216. Two circular through holes are formed on both sides of the guide plate 201 corresponding to the two screws 206 of the fixing plate 216. The diameter of the through holes is slightly larger than the diameter of the screws 206, ensuring that the guide plate 201 can slide freely up and down along the screws 206. A circular hole is also formed in the middle of the guide plate 201 for the connecting post of the valve core fixing component to pass through. This circular hole corresponds vertically to the circular hole in the middle of the fixing plate 216, ensuring that the axis of the valve core fixing component coincides with the axis of the vacuum connector. Two actuating nuts 204 are fitted on each of the two screws 206, located above and below the guide plate 201, respectively. By synchronously rotating the actuating nuts 204 on the two screws 206, the vertical position of the guide plate 201 can be adjusted, thereby driving the valve core fixing component to move up and down, realizing the extraction or installation of the valve core.

[0037] In this embodiment, the valve core fixing component is used to connect the vacuum valve core. Its structure includes an upper clamping plate 202, a lower clamping plate 205, and a pull-out screw 217. The upper clamping plate 202 is a circular metal plate. The lower clamping plate 205 is also a circular metal plate, with a connecting post welded to the center of its upper end face. The diameter of the connecting post is slightly smaller than the diameter of the circular hole in the middle of the guide plate 201, ensuring that the connecting post can rotate freely in the through hole of the guide plate 201. The top of the connecting post is provided with a threaded blind hole. The upper clamping plate 202 has a threaded hole in the middle. The bolt 203 is used to fix the lower clamping plate 205 in sequence with the threaded hole and the threaded blind hole. The pull-out screw 217 is a long rod-shaped structure. Its upper end is vertically welded to the center of the lower end face of the lower clamping plate 205, and its lower end passes through the circular hole in the middle of the fixing plate 216 and the upper connecting threaded joint 215. The guide plate 201 is clamped between the upper clamping plate 202 and the lower clamping plate 205. Due to the gap between the connecting column and the round hole of the guide plate 201, the upper clamping plate 202 and the lower clamping plate 205 can drive the pull screw 217 to rotate freely relative to the guide plate 201, which facilitates the threaded connection between the pull screw 217 and the vacuum valve core.

[0038] In this embodiment, the upper threaded connector 215 is a cylindrical metal part with a through hole in its center, coaxially arranged with the through hole in the middle of the fixing plate 216, and fixed to the upper end face of the fixing plate 216 by welding. The outer surface of the upper threaded connector 215 is provided with external threads for engaging with the clamping nut 207. The clamping nut 207 is a round nut, fitted onto the outside of the upper threaded connector 215. There is an annular gap between the pull screw 217 and the through hole of the upper threaded connector 215. In this gap, from top to bottom, there are a first copper washer 208, a first sealing ring 209, a second copper washer 210, and the first sealing ring 209. When the clamping nut 207 is rotated, its lower end face presses against the first copper washer 208. The deformation of the copper washer presses the sealing ring between the outer surface of the pull screw 217 and the inner wall of the through hole of the upper threaded connector 215, forming a multiple seal to prevent gas leakage from the gap during vacuuming.

[0039] In this embodiment, a three-way pipe 213 is integrally welded to the lower end face of the fixing plate 216 (directly below the upper connecting threaded connector 215). This includes an upper connector, which is welded and fixed to the lower end face of the fixing plate 216, and whose internal channel communicates with the through hole of the upper connecting threaded connector 215. A lower connecting threaded connector 211 is welded to the lower connector, which mates with the first connector 301 of the connector assembly 102. A transverse connector is horizontally positioned in the middle of the three-way pipe 213 and communicates with the internal channels of the upper and lower connectors. One end of the vacuum connection pipe 214 is threadedly fixed to the transverse connector of the three-way pipe 213, and the other end is used to connect to an external vacuum device (such as the air inlet of a vacuum pump), forming a vacuum passage.

[0040] In this embodiment, the connector assembly 102 is the core of the modular design, used to adapt to vacuum connectors of different specifications. Its structure includes a first connector 301 and a second connector 302, which are welded together. The first connector 301 is a cylindrical metal part with external threads on its upper surface, which threadedly engage with the lower connecting threaded connector 211 of the lower connector of the tee pipe 213, thus connecting the connector assembly 102 to the valve core disassembly assembly 101. The lower connecting threaded connector 211 has an annular sealing groove inside, in which a sealing gasket 212 is installed. When the first connector 301 and the lower connecting threaded connector 211 are tightened, the sealing gasket 212 is compressed and deformed, achieving a seal between them. The second connector 302 is a cylindrical metal part, the inner diameter of its lower end matching the outer diameter of the vacuum connector to be connected. It can be designed in various sizes according to the specifications of the vacuum connector. The inner surface of the second connector 302 has three annular sealing grooves along the axial direction, and a second sealing ring 303 is installed in each groove. When the vacuum connector is inserted into the second connector 302, the second sealing ring 303 is squeezed between the two, forming a multiple seal to ensure no gas leakage during the vacuuming process. The connector assembly 102 can be designed in various models according to the specifications of the vacuum connector. Different models of connector assemblies 102 only differ in the inner diameter of the second connector 302, while the structure of the first connector 301 is completely identical. Therefore, it is compatible with the same valve core disassembly assembly 101, achieving the effect of "one valve adapting to multiple specifications".

[0041] Operation process: Taking the vacuuming operation of the A vacuum connector 602 as an example, according to the inner diameter of the A vacuum connector 602, select the A connector assembly 401 with the matching outer diameter of the second connector 302; connect the first connector 301 of the A connector assembly 401 to the lower connecting threaded connector 211 of the lower connector of the three-way pipe 213 in the valve core disassembly assembly 101 through the thread, and tighten it until the sealing gasket 212 is compressed to complete the sealing and fixing of the two.

[0042] Insert the A vacuum connector 602 on the A vacuum pipe 603 into the second connector 302 of the A connector assembly 401, ensuring that the A vacuum connector 602 is fully inserted. At this time, the three layers of second sealing rings 303 on the inner surface of the second connector 302 are tightly fitted to the outer wall of the A vacuum connector 602, forming a preliminary seal.

[0043] The upper clamping plate 202 of the rotating valve core fixing component (drives the lower clamping plate 205 and the pull screw 217 to rotate synchronously), so that the lower end of the pull screw 217 is inserted into the threaded connection hole of the A vacuum valve core 601 in the A vacuum connector 602, and tightened until the pull screw 217 is firmly connected to the A vacuum valve core 601.

[0044] Since a certain degree of vacuum (negative pressure) still exists inside vacuum pipe A 603, vacuum valve core A 601 is attracted to vacuum connector A 602. At this time, by simultaneously rotating the two screws 206 with a wrench, the actuating nut 204 located below the guide plate 201 moves upward and pushes the guide plate 201 to rise. The guide plate 201 drives the upper clamping plate 202, the lower clamping plate 205 and the pull screw 217 to rise simultaneously, thereby slowly pulling vacuum valve core A 601 out of vacuum connector A 602 (the rising speed can be controlled by the speed of rotating the actuating nut 204).

[0045] During this process, the nut 204 above the guide plate 201 provides space for the guide plate to move. Since the rotational force of the nut 204 is converted into the lifting force of the guide plate 201 through the screw 206, it is more labor-saving than traditional manual operation, and excessive force can be avoided by controlling the rotation speed. At the same time, the first copper washer 208 and the first sealing ring 209 between the pull screw 217 and the upper connecting threaded joint 215 are kept sealed under the action of the clamping nut 207 to prevent external gas from entering the pipeline.

[0046] Connect the other end of the vacuum connection pipe 214 to the air inlet of the external vacuum pump and start the vacuum pump. At this time, the vacuum pump forms a passage with the A vacuum pipe 603 through the vacuum connection pipe 214, the three-way pipe 213, and the connector assembly, and evacuates the inside of the A vacuum pipe 603. Since all connection parts are sealed by sealing rings, the vacuuming efficiency can be ensured.

[0047] When vacuuming is required for the B-type vacuum connector, simply unscrew the A connector assembly 401 and replace it with the matching B connector assembly 501. Connect the first connector 301 of the B connector assembly 501 to the lower threaded connector 211 of the lower connector of the tee pipe 213 in the valve core disassembly assembly 101 via threads, and tighten until the sealing gasket 212 is compressed to complete the sealing and fixing of both. Insert the B vacuum connector 702 on the B vacuum pipe 703 into the second connector 302 of the B connector assembly 501, ensuring that the B vacuum connector 702 is fully inserted. At this time, the three layers of second sealing rings 303 on the inner surface of the second connector 302 are tightly fitted to the outer wall of the B vacuum connector 702, forming a preliminary seal. The upper clamping plate 202 of the rotating valve core fixing component (drives the lower clamping plate 205 and the pull-out screw 217 to rotate synchronously), so that the lower end of the pull-out screw 217 is inserted into the threaded connection hole of the B vacuum valve core 701 in the B vacuum connector 702, and tightened until the pull-out screw 217 is firmly connected to the B vacuum valve core 701. Then, the same operation is performed by rotating the actuating nut 204. There is no need to replace the valve core disassembly assembly 101, making the operation convenient. It should be noted that the A vacuum connector 602 and the B vacuum connector 702 are vacuum connectors of different sizes.

[0048] This invention can adapt to various specifications of vacuum connectors by replacing connector assemblies with different sizes of the second connector 302, eliminating the need to carry multiple vacuum valves and reducing transportation difficulty; the cooperation of the screw 206 and the actuating nut 204 converts rotational force into linear tension, avoiding the need to manually pull out the valve core and reducing operational difficulty; the combination design of multiple sealing rings and copper gaskets ensures the sealing performance of each connection part and avoids air leakage during vacuuming; the controllable speed extraction of the valve core reduces the risk of damage to the valve core and screw 206, extending the service life of the equipment.

[0049] The above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model. Technologies, shapes, and structural parts not described in detail in this utility model are all known technologies.

Claims

1. A vacuum valve based on modular design and adaptable to various specifications of vacuum connectors, used for connecting vacuum connectors on vacuum pipelines, characterized in that: It includes a valve core disassembly assembly (101) and a connector assembly (102); the valve core disassembly assembly (101) and the connector assembly (102) are detachably and sealedly connected; the connector assembly (102) is detachably and sealedly connected to a vacuum connector; the valve core disassembly assembly (101) is used to install and disassemble the vacuum valve core in the vacuum connector; the valve core disassembly assembly (101) is provided with a vacuum connection pipe (214) for connecting a vacuum pumping device to evacuate the vacuum pipe.

2. The vacuum valve based on modular design and adaptable to various specifications of vacuum connectors according to claim 1, characterized in that: The valve core disassembly assembly (101) includes a fixing plate (216), a guide plate (201), and a valve core fixing component; the upper ends of both sides of the fixing plate (216) are symmetrically provided with screws (206); the guide plate (201) is provided with two through holes at corresponding positions for passing through the two screws (206); each screw (206) is provided with two working nuts (204), located above and below the guide plate (201) respectively; the guide plate (201) and the fixing plate (216) are both provided with round holes in the middle, and are vertically aligned; the valve core fixing component is used to connect the valve core, and it passes through the round holes on the guide plate (201) and the fixing plate (216) in sequence from above the guide plate (201), and is rotatable relative to the guide plate (201) and the fixing plate (216).

3. A vacuum valve based on modular design and adaptable to various specifications of vacuum connectors according to claim 2, characterized in that: The valve core fixing component includes an upper clamping plate (202), a lower clamping plate (205), and a pull screw (217); the lower clamping plate (205) is provided with a connecting post; the diameter of the connecting post is smaller than the diameter of the circular hole in the middle of the guide plate (201); the upper clamping plate (202) is provided with a threaded hole at a corresponding position; the upper clamping plate (202) and the lower clamping plate (205) are fixed by bolts (203) to restrict the guide plate (201) between the upper clamping plate (202) and the lower clamping plate (205), while the upper clamping plate (202) and the lower clamping plate (205) can rotate relative to the guide plate (201); the pull screw (217) is fixed at the lower end of the lower clamping plate (205) and passes through the circular hole on the fixing plate (216).

4. A vacuum valve based on modular design and adaptable to various specifications of vacuum connectors according to claim 3, characterized in that: The fixed plate (216) has an upper connecting threaded connector (215) on its round hole; the upper connecting threaded connector (215) has a through hole with a diameter equivalent to that of the round hole of the fixed plate (216) and is coaxially arranged with the round hole of the fixed plate (216); the top of the upper connecting threaded connector (215) is connected to a clamping nut (207) by a thread.

5. A vacuum valve based on modular design and adaptable to various specifications of vacuum connectors according to claim 4, characterized in that: The gap between the pull-out screw (217) and the upper connecting threaded joint (215) is provided with a first copper washer (208), a first sealing ring (209), a second copper washer (210), and a first sealing ring (209) in sequence from top to bottom; when the clamping nut (207) is rotated to connect the upper connecting threaded joint (215), it presses the first copper washer (208), the sealing ring, the second copper washer (210), and the sealing ring to form a seal.

6. A vacuum valve based on modular design and adaptable to various specifications of vacuum connectors according to claim 3, characterized in that: The lower end of the fixing plate (216) is integrally provided with a three-way pipe (213); the three-way pipe (213) includes an upper connector and a lower connector in the vertical direction and a transverse connector in the horizontal direction; the upper connector is connected to the fixing plate (216); the lower connector of the three-way pipe (213) is provided with a lower connecting threaded connector (211); the connector assembly (102) includes a first connector (301) and a second connector (302); the first connector (301) is provided with an external thread that mates with the lower connecting threaded connector (211).

7. A vacuum valve based on modular design and adaptable to various specifications of vacuum connectors according to claim 6, characterized in that: The lower connecting threaded joint (211) is provided with a sealing groove, and a sealing gasket (212) is provided in the sealing groove.

8. A vacuum valve based on modular design and adaptable to various specifications of vacuum connectors according to claim 6, characterized in that: The size of the second connector (302) is equivalent to the size of the vacuum connector on the corresponding vacuum pipeline; the second connector (302) is provided with several layers of sealing grooves, and each sealing groove is provided with a second sealing ring (303).

9. A vacuum valve based on modular design and adaptable to various specifications of vacuum connectors according to claim 6, characterized in that: The vacuum connection pipe (214) is integrally connected to the horizontal joint of the tee pipe (213) and is used to connect the vacuum device to evacuate the vacuum pipe.

10. A vacuum valve based on modular design and adaptable to various specifications of vacuum connectors according to claim 6, characterized in that: The pull-out screw (217) extends to the lower connecting threaded joint (211); the vacuum valve core is provided with a threaded connection hole; the pull-out screw (217) is fixedly connected to the vacuum valve core in conjunction with the threaded connection hole.

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