CN112524269A - Manual gate valve - Google Patents
Manual gate valve Download PDFInfo
- Publication number
- CN112524269A CN112524269A CN202011382508.4A CN202011382508A CN112524269A CN 112524269 A CN112524269 A CN 112524269A CN 202011382508 A CN202011382508 A CN 202011382508A CN 112524269 A CN112524269 A CN 112524269A
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- CN
- China
- Prior art keywords
- valve body
- transmission
- manual gate
- gate valve
- valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
- F16K3/0254—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor being operated by particular means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
- F16F15/06—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs
- F16F15/067—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs using only wound springs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/04—Construction of housing; Use of materials therefor of sliding valves
- F16K27/044—Construction of housing; Use of materials therefor of sliding valves slide valves with flat obturating members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
- F16K3/314—Forms or constructions of slides; Attachment of the slide to the spindle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
- F16K3/316—Guiding of the slide
- F16K3/3165—Guiding of the slide with rollers or balls
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Mechanically-Actuated Valves (AREA)
Abstract
The invention discloses a manual gate valve, which comprises a valve body and a valve cavity arranged in the valve body, wherein the valve cavity is of a rectangular structure, the surface of the valve body is provided with a through hole, the surface of the valve body where the through hole is positioned is provided with an external flange for externally connecting a pipeline, the valve cavity is internally provided with a sealing element for sealing the through hole in a sliding way, the upper end of the sealing element is connected with a pushing element which drives the sealing element to move up and down through a transmission lever so as to realize the switching of opening and closing, the invention is designed aiming at the defects of the prior device, the redundant power in the transmission process can be absorbed by arranging the power unloading piece, the serious collision between the parts is avoided, the service life of the device is prolonged, in addition, the abrasion among parts is reduced through the arrangement of the guide mechanism, and a lever for transmission is further arranged, so that the displacement stroke of the pushing piece is effectively reduced, the integral size of the device is reduced, and the practicability is high.
Description
Technical Field
The invention relates to the technical field of valves, in particular to a manual gate valve.
Background
Gate valves are also known as hand knife gate valves. The knife gate valve is a valve with a flashboard and a valve seat which are always in close contact and sealed, and the principle is that a round opening with the same drift diameter is formed in the flashboard, and the round opening on the flashboard is completely separated from and matched with the drift diameter by opening and closing the flashboard. The valve has the advantages that the drift diameter of the valve body is not provided with a groove, the medium cannot be blocked and blocked, the valve has the full-drift-diameter circulation characteristic, and the sealing structure can be divided into a soft sealing structure and a hard sealing structure. The penetrating knife gate valve has the characteristics of precise structure, good manufacturability, compact structure and the like, and the sealing valve seat is designed to be a movable structure and has the functions of abrasion resistance and automatic compensation, so the service life is longer.
The existing gate valve is large in size and inconvenient to use due to the fact that a driving mechanism and a transmission mechanism are complex, and an improved manual gate valve is provided aiming at the problem.
Disclosure of Invention
The invention aims to provide a manual gate valve to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a manual push-pull valve, includes the valve body and sets up the valve pocket in its inside, the valve pocket is the rectangle structure, the opening has been seted up on the valve body surface, and the valve body surface at opening place is equipped with the external flange that is used for external pipeline, the inside slip of valve pocket is equipped with the sealing member that is used for the shutoff opening, its up-and-down motion is connected through the transmission lever in the sealing member upper end drives the impeller of its up-and-down motion in order to realize the switching, the upper cover that is used for the shutoff can be dismantled at the valve body top, the upper cover upper end.
As a further scheme of the invention: the pushing piece comprises a fixed column installed at the upper end of the upper cover, a sliding hole communicated with the valve body is formed in the fixed column, a lifting column connected with the upper end of the transmission lever is in sliding fit in the sliding hole, an inner threaded hole is formed in the upper end of the lifting column, a transmission screw rod is arranged in the inner threaded hole in a matched mode, and the upper end of the transmission screw rod is connected with a rotating mechanism used for driving the transmission screw rod to rotate.
As a further scheme of the invention: the rotary mechanism comprises a force unloading part which is rotatably arranged at the upper end of a fixed column, the input end of the force unloading part is connected with a valve body which is convenient for manual operation, the force unloading part comprises a fixed disc which is rotatably connected with the fixed column, a transmission cavity is arranged inside the fixed disc, a rotary block which is connected with the upper end of a transmission screw rod is rotatably arranged inside the transmission cavity, the top of the rotary block is provided with a connecting shaft which is connected with a hand wheel, at least three installation cavities are distributed on the outer side of the lower end of the rotary block in an array mode, a steel ball which is used for abutting against the inner wall of the transmission cavity is arranged at the lower end of each installation cavity in a matched mode, and.
As a further scheme of the invention: the valve body surface is equipped with a plurality of parallel arrangement's strengthening rib.
As a further scheme of the invention: the transmission lever comprises two transmission connecting rods, the two transmission connecting rods are connected through a rotating shaft, and the inner wall of the valve body is provided with a guide sliding groove which is matched with the end part of the rotating shaft and used for guiding the two transmission connecting rods to be bent and folded.
As a further scheme of the invention: the sealing member includes the sliding seat, the sliding seat outside be equipped with valve body inner wall sliding fit's guiding mechanism, a dodge gate that is used for the shutoff opening is installed to the sliding seat intermediate position.
As a further scheme of the invention: the surface of the movable door is provided with a sealing gasket for providing sealing performance.
As a further scheme of the invention: the guide mechanism comprises supporting legs arranged at four corners of the movable seat, each supporting leg is provided with a second guide wheel in abutting contact with the first inner wall of the valve body and a first guide wheel in abutting contact with the second inner wall of the valve body, and the supporting legs and the first guide wheels are adjacent vertical surfaces.
As a still further scheme of the invention: the two sides of the lower end of the movable seat are symmetrically provided with a support rod, and the lower end of the support rod is provided with a pressing block for pressing the bottom in the valve body.
Compared with the prior art, the invention has the beneficial effects that: the invention is designed aiming at the defects of the prior device, can absorb redundant power in the transmission process by arranging the force unloading piece, avoids serious collision between parts, prolongs the service life of the device, reduces the abrasion between the parts by arranging the guide mechanism, and is also provided with the lever for transmission, thereby effectively reducing the displacement stroke of the pushing piece, reducing the integral volume of the device and having strong practicability.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic view of the internal structure of the present invention.
Fig. 3 is a schematic structural view of the interior of the force unloading member of the present invention.
Wherein: the valve comprises a valve body 11, an upper cover 12, a force unloading part 13, a hand wheel 14, a reinforcing rib 15, an external flange 16, a through hole 17, a transmission lever 18, a lifting column 19, a transmission screw rod 20, a steel ball 21, a force unloading spring 22, an installation cavity 23, an internal screw hole 24, a movable seat 25, a pressing block 26, a movable door 27, a first guide wheel 28, a supporting leg 29 and a second guide wheel 30.
Detailed Description
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, in the embodiment of the present invention, a manual gate valve includes a valve body 11 and a valve cavity disposed inside the valve body 11, the valve cavity has a rectangular structure, a through hole 17 is disposed on a surface of the valve body 11, an external flange 16 for externally connecting a pipeline is disposed on the surface of the valve body 11 where the through hole 17 is located, a sealing member for sealing the through hole 17 is slidably disposed inside the valve cavity, an upper end of the sealing member is connected to a pushing member for driving the sealing member to move up and down through a transmission lever 18 to realize switching, an upper cover 12 for sealing is detachably disposed on the top of the valve body 11, and a mounting hole matched with the pushing member is disposed in the middle position of;
the surface of the valve body 11 is provided with a plurality of reinforcing ribs 15 which are arranged in parallel;
the pushing piece comprises a fixed column arranged at the upper end of the upper cover 12, a sliding hole communicated with the valve body 11 is formed in the fixed column, a lifting column 19 connected with the upper end of a transmission lever 18 is in sliding fit in the sliding hole, an inner threaded hole 24 is formed in the upper end of the lifting column 19, a transmission screw rod 20 is arranged in the inner threaded hole 24 in a matching mode, the upper end of the transmission screw rod 20 is connected with a rotating mechanism used for driving the transmission screw rod to rotate, the transmission screw rod 20 and the inner threaded hole 24 rotate relatively under the driving of the rotating mechanism, the lifting column 19 can slide along the inner portion of the sliding hole under the action of threads, and the lifting column 19 can carry a sealing piece to move up and down through the transmission lever 18 when sliding up and;
the transmission lever 18 comprises two transmission connecting rods which are connected through a rotating shaft, a guide sliding groove which is matched with the end part of the rotating shaft and used for guiding the two transmission connecting rods to bend and fold is arranged on the inner wall of the valve body 11, and when the pushing piece drives the transmission lever 18 to move, the two transmission connecting rods can be folded under the action of the guide sliding groove, so that the displacement stroke of the pushing piece is effectively reduced, and the integral volume of the device is favorably reduced;
the rotating mechanism comprises a force unloading part 13 rotationally arranged at the upper end of a fixed column, the input end of the force unloading part 13 is connected with a valve body 11 convenient for manual operation, the force unloading part comprises a fixed disc rotationally connected with the fixed column, a transmission cavity is arranged in the fixed disc, a rotating block connected with the upper end of a transmission screw rod 20 is rotationally arranged in the transmission cavity, the top of the rotating block is provided with a connecting shaft connected with a hand wheel 14, at least three installation cavities 23 are distributed on the outer side of the lower end of the rotating block in an array manner, a steel ball 21 used for abutting against the inner wall of the transmission cavity is arranged at the lower end port of each installation cavity 23 in a matching manner, a force unloading spring 22 used for abutting against the upper side surface of the steel ball 21 is also arranged in the installation cavity 23, under the gravity of a sealing element, the whole rotating block is in pressing contact with the inner bottom, the force-unloading spring 22 can absorb the impact force, so that the parts are prevented from being impacted, and the service life of the device is prolonged;
the sealing element comprises a movable seat 25, a guide mechanism in sliding fit with the inner wall of the valve body 11 is arranged on the outer side of the movable seat 25, a movable door 27 for sealing the through hole 17 is installed in the middle of the movable seat 25, and a sealing gasket for providing sealing performance is arranged on the surface of the movable door 27;
the guide mechanism comprises supporting legs 29 arranged at four corners of the movable seat 25, each supporting leg 29 is provided with a second guide wheel 30 which is in abutting contact with the first inner wall of the valve body 11 and a first guide wheel 28 which is in abutting contact with the second inner wall of the valve body 11, and the supporting legs 29 and the first guide wheels 28 are adjacent vertical surfaces;
two sides of the lower end of the movable seat 25 are symmetrically provided with a support rod, the lower end of the support rod is provided with a pressing block 26 for pressing against the bottom in the valve body 11, and when the movable seat 25 descends to the lowest position, the pressing block 26 is in pressing contact with the bottom in the valve body 11, so that a supporting effect is achieved on a sealing element.
The working principle of the invention is as follows: during practical use, the hand wheel 14 drives the transmission screw rod 20 and the inner screw hole 24 to rotate relatively, the lifting column 19 can slide along the inside of the sliding hole under the action of the threads, the lifting column 19 can carry the sealing element to move up and down through the transmission lever 18 when sliding up and down, so that the switching of the opening and closing of the valve body is completed, the whole rotating block is in pressing contact with the bottom in the transmission cavity under the gravity of the sealing element, the sliding friction is converted into rolling friction due to the steel balls 21 arranged in the rotating block, and the force-unloading spring 22 can absorb impact force to complete displacement, positioning, sealing and locking of the sealing mechanism and leakage of redundant kinetic energy.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (9)
1. The manual gate valve comprises a valve body (11) and a valve cavity arranged inside the valve body, wherein the valve cavity is of a rectangular structure, a through opening (17) is formed in the surface of the valve body (11), an external flange (16) used for an external pipeline is arranged on the surface of the valve body (11) where the through opening (17) is located, the manual gate valve is characterized in that a sealing piece used for blocking the through opening (17) is arranged inside the valve cavity in a sliding mode, the upper end of the sealing piece is connected with a pushing piece used for driving the sealing piece to move up and down through a transmission lever (18) so as to achieve switching, an upper cover (12) used for blocking is detachably arranged at the top of the valve body (11), and a mounting hole matched with the pushing.
2. The manual gate valve according to claim 1, wherein the pushing member comprises a fixed column mounted at the upper end of the upper cover (12), the fixed column is internally provided with a sliding hole communicated with the valve body (11), a lifting column (19) connected with the upper end of the transmission lever (18) is in sliding fit in the sliding hole, an inner screw hole (24) is formed at the upper end of the lifting column (19), a transmission screw rod (20) is in fit in the inner screw hole (24), and the upper end of the transmission screw rod (20) is connected with a rotating mechanism for driving the transmission screw rod to rotate.
3. The manual gate valve according to claim 2, wherein the rotating mechanism comprises a force unloading member (13) rotatably arranged at the upper end of the fixed column, the input end of the force unloading member (13) is connected with a valve body (11) convenient for manual operation, the force unloading member (13) comprises a fixed disc rotatably connected with the fixed column, a transmission cavity is arranged inside the fixed disc, a rotating block connected with the upper end of a transmission screw rod (20) is rotatably arranged inside the transmission cavity, a connecting shaft connected with a hand wheel (14) is arranged at the top of the rotating block, at least three installation cavities (23) are distributed on the outer side of the lower end of the rotating block in an array manner, a steel ball (21) used for abutting against the inner wall of the transmission cavity is arranged at the lower port of each installation cavity (23) in a matched manner, and a force unloading spring (22) used for abutting against the upper side face of the steel ball (.
4. A manual gate valve according to claim 1, characterised in that the valve body (11) is provided with a number of parallel arranged ribs (15) on its surface.
5. The manual gate valve according to claim 1, characterized in that the transmission lever (18) comprises two transmission connecting rods connected by a rotating shaft, and the inner wall of the valve body (11) is provided with a guide chute matched with the end of the rotating shaft for guiding the two transmission connecting rods to bend and fold.
6. A manual gate valve according to claim 1, characterised in that said sealing means comprises a sliding seat (25), said sliding seat (25) being provided on its outer side with guide means in sliding engagement with the inner wall of the valve body (11), said sliding seat (25) being provided in its intermediate position with a shutter (27) for blocking the through opening (17).
7. A manual gate valve according to claim 6, characterised in that the surface of the gate (27) is provided with a gasket for providing sealing.
8. A manual gate valve according to claim 6, characterised in that the guide means comprise support feet (29) arranged at the four corners of the movable seat (25), each support foot (29) being provided with a second guide wheel (30) in contact with the first inner wall of the valve body (11) and a first guide wheel (28) in contact with the second inner wall of the valve body (11), the support feet (29) and the first guide wheels (28) being adjacent vertical surfaces.
9. The manual gate valve according to claim 6, wherein a support rod is symmetrically arranged on two sides of the lower end of the movable seat (25), and a pressing block (26) for pressing the bottom in the valve body (11) is arranged at the lower end of the support rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011382508.4A CN112524269A (en) | 2020-11-30 | 2020-11-30 | Manual gate valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011382508.4A CN112524269A (en) | 2020-11-30 | 2020-11-30 | Manual gate valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112524269A true CN112524269A (en) | 2021-03-19 |
Family
ID=74995704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011382508.4A Pending CN112524269A (en) | 2020-11-30 | 2020-11-30 | Manual gate valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112524269A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113007419A (en) * | 2021-03-25 | 2021-06-22 | 黑龙江省穆棱市电站阀门有限责任公司 | Quick opening and closing gate valve |
| CN116498762A (en) * | 2023-06-30 | 2023-07-28 | 靖江佳晟真空技术有限公司 | Vacuum gate valve |
-
2020
- 2020-11-30 CN CN202011382508.4A patent/CN112524269A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113007419A (en) * | 2021-03-25 | 2021-06-22 | 黑龙江省穆棱市电站阀门有限责任公司 | Quick opening and closing gate valve |
| CN116498762A (en) * | 2023-06-30 | 2023-07-28 | 靖江佳晟真空技术有限公司 | Vacuum gate valve |
| CN116498762B (en) * | 2023-06-30 | 2023-09-01 | 靖江佳晟真空技术有限公司 | Vacuum gate valve |
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