CN114060545A - Vacuum gate valve with antidetonation function - Google Patents

Vacuum gate valve with antidetonation function Download PDF

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Publication number
CN114060545A
CN114060545A CN202110487706.5A CN202110487706A CN114060545A CN 114060545 A CN114060545 A CN 114060545A CN 202110487706 A CN202110487706 A CN 202110487706A CN 114060545 A CN114060545 A CN 114060545A
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CN
China
Prior art keywords
cover plate
sealing
valve
sealing plate
plate
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.)
Pending
Application number
CN202110487706.5A
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Chinese (zh)
Inventor
张魁榜
许忠政
张建辉
张晓剑
何美悦
齐英
陈林
张黎源
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sichuan Jiutian Vacuum Technology Co ltd
Research Institute of Physical and Chemical Engineering of Nuclear Industry
Original Assignee
Sichuan Jiutian Vacuum Technology Co ltd
Research Institute of Physical and Chemical Engineering of Nuclear Industry
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sichuan Jiutian Vacuum Technology Co ltd, Research Institute of Physical and Chemical Engineering of Nuclear Industry filed Critical Sichuan Jiutian Vacuum Technology Co ltd
Priority to CN202110487706.5A priority Critical patent/CN114060545A/en
Publication of CN114060545A publication Critical patent/CN114060545A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • F16K51/00—Other details not peculiar to particular types of valves or cut-off apparatus
    • F16K51/02—Other details not peculiar to particular types of valves or cut-off apparatus specially adapted for high-vacuum installations
    • 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
    • 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
    • F16K3/0227—Packings
    • 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
    • F16K3/0281—Guillotine or blade-type valves, e.g. no passage through the valve member
    • 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
    • F16K3/16—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 with special arrangements for separating the sealing faces or for pressing them together
    • F16K3/18—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 with special arrangements for separating the sealing faces or for pressing them together by movement of the closure members
    • F16K3/182—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 with special arrangements for separating the sealing faces or for pressing them together by movement of the closure members by means of toggle links
    • 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
    • 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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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sliding Valves (AREA)
  • Details Of Valves (AREA)

Abstract

The invention discloses a vacuum gate valve with an anti-seismic function, which comprises a valve body, a driving mechanism and a valve core assembly, wherein the valve body comprises a valve body frame, a first cover plate and a second cover plate, valve openings are respectively arranged on the first cover plate and the second cover plate, and flange structures with flange sealing surfaces on two sides are integrally formed at positions of the first cover plate and the second cover plate corresponding to the valve openings; the valve core assembly comprises an installation frame connected with the driving mechanism and a sealing plate which is movably connected to the installation frame through a plurality of swing rods and is positioned between the installation frame and the first cover plate; the sealing plate is provided with a limiting wheel, and the valve body is provided with a stop block; when the limiting wheel abuts against the stop block, the mounting frame continues to move downwards, the swing rod rotates by a certain angle, the sealing plate is pushed out in the direction away from the mounting frame until the sealing plate abuts against the flange sealing surface, and the valve opening is sealed; the sealing plate is tightly pressed on the flange sealing surface by the swing rod, the sealing performance between the sealing plate and the flange sealing surface is good, and leakage can not occur even under the earthquake working condition.

Description

Vacuum gate valve with antidetonation function
Technical Field
The invention relates to the technical field of vacuum valves, in particular to a vacuum gate valve with an anti-seismic function.
Background
The traditional energy power generation technology has serious environmental pollution, and the nuclear power technology is a pollution-free renewable energy power generation technology, so that the traditional energy power generation technology is more and more extensive in practical application and has higher and more safety on nuclear power equipment.
Nuclear power equipment is complex and large, and needs to work for a long time under strong radiation conditions, the leakage detection in the manufacturing process of fuel elements and control rods, the equipment manufacturing process and the manufacturing of some special materials all relate to the application of vacuum technology, and valves are indispensable constituent units of vacuum equipment. The vacuum gate valve without nuclear safety level is used in domestic vacuum industry, and the nuclear safety level vacuum valve has strict requirements on safety level, quality assurance level and earthquake resistance according to the working condition requirements of special nuclear power equipment.
However, the conventional vacuum valve has poor shock resistance, is difficult to normally use under the earthquake working condition, and is difficult to meet the working condition requirements of special nuclear power equipment.
Disclosure of Invention
Therefore, the invention aims to overcome the defects that the vacuum gate valve in the prior art is poor in anti-seismic capability and difficult to safely and normally use under the earthquake working condition, and thus the vacuum gate valve with the anti-seismic function is provided.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a vacuum gate valve with shock resistant function comprising:
the valve body comprises a valve body frame, a first cover plate and a second cover plate, wherein the first cover plate and the second cover plate are respectively connected to two opposite sides of the valve body frame;
the valve core assembly is connected in the valve body frame in a sliding mode and reciprocates along the direction perpendicular to the connecting line direction of the first cover plate and the second cover plate under the action of the driving mechanism;
a first flange structure positioned on the periphery of the first valve opening is integrally formed on the first cover plate, and two side surfaces of the first flange structure are flange sealing surfaces; when the valve core assembly is in a closed state, the valve core assembly is abutted to the flange sealing surface.
Further, the valve core assembly comprises a sealing plate and a mounting frame which are sequentially arranged at intervals along the connecting line direction of the first cover plate and the second cover plate, and a plurality of swing rods, one ends of which are hinged to the sealing plate, and the other ends of which are hinged to the mounting frame; the mounting frame is connected with the driving rod of the driving mechanism;
a limiting piece is arranged on the outer side of the sealing plate, and a stop block matched with the limiting piece is arranged on the valve body;
when the limiting piece abuts against the stop block, the swing rod rotates along with the movement of the mounting rack to adjust the distance between the sealing plate and the mounting rack so as to tightly prop the sealing plate against the flange sealing surface of the first flange structure and close the first valve opening.
Furthermore, the limiting parts are limiting wheels connected to two opposite sides of the sealing plate, and rolling surfaces of the limiting wheels are abutted to inner side surfaces, facing the second cover plate, of the first cover plate.
Further, the opposite two sides of the sealing plate are fixedly connected with roller mounting seats, and the limiting wheels are mounted on the roller mounting seats.
Furthermore, the stop block is connected to the inner side wall of the first cover plate facing the second cover plate, and a groove which is located on one side of the stop block and used for the locating part to be placed in is formed in the inner side wall of the first cover plate facing the second cover plate.
Further, the mounting frame comprises an upper cross beam, a lower cross beam and a plurality of longitudinal beams connected between the upper cross beam and the lower cross beam; the upper cross beam is connected to a driving rod of the driving mechanism, the longitudinal beam is connected with a plurality of top wheels arranged around the opening of the first valve, and rolling surfaces of the top wheels are abutted to the second cover plate.
Furthermore, a through hole for the driving rod to pass through is formed in the upper cross beam, a fixing seat located on one side of the upper cross beam is fixedly connected to the part, through which the driving rod passes, of the driving rod, and a fixing ring sleeved on the driving rod is arranged on the other side of the upper cross beam.
Furthermore, one end of each swing rod is hinged to the longitudinal beam through a pin shaft, and the swing rods are distributed uniformly around the center of the sealing plate.
Further, two opposite ends of the upper cross beam and the lower cross beam are provided with side wheels, and rolling surfaces of the side wheels are abutted against the inner wall surface of the valve body frame.
Furthermore, a mounting groove is formed in the position, corresponding to the swing rod, of the sealing plate, a mounting seat is mounted in the mounting groove, and one end of the swing rod is rotatably connected to the mounting seat through a rotating shaft.
Furthermore, an annular clamping groove is formed in the mounting seat, an arc-shaped clamping groove corresponding to the annular clamping groove is formed in the side wall of the mounting groove, and a clamping ring is arranged in a space between the annular clamping groove and the arc-shaped clamping groove.
Furthermore, a sealing groove is formed in the surface, facing the first cover plate, of the sealing plate, and a radiation-resistant sealing ring is arranged in the sealing groove.
The technical scheme of the invention has the following advantages:
1. according to the vacuum gate valve with the anti-seismic function, the first flange structure is integrally formed on the first cover plate, when the valve core assembly is in the closed state, the valve core assembly abuts against the flange sealing surface of the first flange structure on the first cover plate, the integrated design of the flange sealing structure and the first cover plate structure is realized, the flange structure does not need to be additionally welded at the opening of the first valve, the welding deformation is reduced, the number of parts on the valve body is also reduced, the sealing performance is good, and the leakage cannot occur even under the earthquake working condition.
2. According to the vacuum gate valve with the shock-proof function, the sealing plate is movably connected to the mounting frame through the plurality of swing rods, the driving mechanism drives the mounting frame to move downwards in the closing process of the sealing plate, the mounting frame drives the sealing plate to move downwards together through the swing rods, when the sealing plate moves to the position of the stop block, the limiting piece on the sealing plate abuts against the stop block, the sealing plate cannot continue to move downwards at the moment, the mounting frame continues to move downwards under the action of the driving mechanism, at the moment, the swing rods rotate by a certain angle, the sealing plate is pushed out in the direction away from the mounting frame until the sealing plate is abutted against the flange sealing surface of the first flange structure and the first valve opening is sealed; according to the vacuum gate valve, in the closing process of the sealing plate, the sealing plate is tightly pressed on the flange sealing surface of the first flange structure through the swing rod, the acting force of the swing rod on the sealing plate is large, the sealing performance between the sealing plate and the flange sealing surface is good, and leakage can not occur even under the earthquake working condition.
3. According to the vacuum gate valve with the anti-vibration function, the limiting pieces are limiting wheels connected to two opposite sides of the sealing plate, the limiting wheels are installed on the sealing plate through the roller installation seat, the rolling surfaces of the limiting wheels are abutted to the inner side face, facing the second cover plate, of the first cover plate, the limiting wheels play a role in motion guiding and supporting the sealing plate, and friction of the sealing plate in the motion process can be reduced.
4. According to the vacuum gate valve with the shock-proof function, the groove for placing the limiting piece is formed in the inner side wall, facing the second cover plate, of the first cover plate, when the limiting wheel moves to the position abutting against the limiting block, the swing rod can push the sealing plate to move towards the direction close to the first cover plate, the limiting wheel can roll into the groove, and the influence of acting force between the limiting wheel and the first cover plate on sealing between the sealing plate and the first cover plate is reduced.
5. According to the vacuum gate valve with the anti-seismic function, the longitudinal beam is connected with the plurality of top wheels arranged around the opening of the first valve, and the rolling surfaces of the plurality of top wheels are abutted against the second cover plate; the top wheel plays a role in motion guiding and supporting the mounting frame, when the sealing plate is subjected to the pressure of the external atmospheric pressure, the pressure can be transmitted to the second cover plate through the swing rod, the longitudinal beam and the top wheel, so that the sealing plate can reversely push the atmospheric pressure, the bidirectional sealing of the valve is realized, and a good sealing state can be kept even under the condition of abnormal atmospheric pressure; in addition, the top wheel can also reduce the friction in the relative motion process of the mounting frame and the second cover plate.
6. According to the vacuum gate valve with the anti-seismic function, the upper cross beam is fixed in a manner of matching the fixed seat and the fixed ring, so that a certain redundancy is reserved, and the requirement on anti-loosening tightness is met.
7. According to the vacuum gate valve with the anti-vibration function, the plurality of swing rods are uniformly distributed around the center of the sealing plate, so that the sealing plate can be uniformly stressed, the impact in the opening and closing process of the sealing plate is small, and the operation noise is low.
8. According to the vacuum gate valve with the anti-seismic function, the side wheels are arranged at the two opposite ends of the upper cross beam and the lower cross beam, the rolling surfaces of the side wheels are abutted against the inner wall surface of the valve body frame, the motion guide effect on the mounting frame can be achieved, and the friction resistance in the motion process is reduced.
9. According to the vacuum gate valve with the anti-seismic function, the mounting seat is fixed in the mounting groove of the sealing plate through the clamping ring, so that the mounting seat can be prevented from loosening, and the mounting seat and the sealing plate can be reliably connected even under the earthquake working condition.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic view of an overall structure of a vacuum gate valve according to an embodiment of the present invention;
FIG. 2 is an exploded view of a vacuum gate valve provided in accordance with an embodiment of the present invention;
FIG. 3 is a partial schematic view of the vacuum gate valve with the second cover plate hidden therein according to the embodiment of the present disclosure;
FIG. 4 is a schematic structural diagram of a first cover plate according to an embodiment of the present invention;
fig. 5 is a schematic view of the installation structure of the oscillating bar and the installation seat on the sealing plate in the embodiment of the invention.
Description of reference numerals: 1. a valve body; 11. a valve body frame; 12. a first cover plate; 121. a first valve opening; 122. a stop block; 123. a groove; 13. a second cover plate; 2. a drive mechanism; 21. a drive rod; 131. a second valve opening; 31. a sealing plate; 311. a limiting wheel; 312. a roller mounting seat; 313. mounting grooves; 314. an arc-shaped clamping groove; 32. a mounting frame; 321. an upper cross beam; 322. a lower cross beam; 323. a stringer; 33. a swing rod; 34. a top wheel; 35. a pin shaft; 36. a side wheel; 37. a mounting seat; 371. an annular neck; 38. a rotating shaft; 39. a collar; 4. a fixed seat; 5. a fixing ring; 6. and (5) sealing rings.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. 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.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
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 meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
The vacuum gate valve with the shock-proof function shown in fig. 1-3 comprises a valve body 1, a driving mechanism 2 and a valve core assembly. The valve body 1 includes a valve body frame 11, a first cover plate 12 and a second cover plate 13 connected to two opposite sides of the valve body frame 11, the first cover plate 12 is provided with a first valve opening 121, and the second cover plate 13 is provided with a second valve opening 131. A first flange structure is integrally formed on the first cover plate 12 at the periphery of the first valve opening 121, and a second flange structure is integrally formed on the second cover plate 13 at the periphery of the second valve opening 131. Two side surfaces of the first flange structure and the second flange structure are processed into flange sealing surfaces; when the valve core assembly is in a closed state, the valve core assembly abuts against a flange sealing surface on the first flange structure. With first flange structure integrated into one piece on first apron 12, realized the integrated design of flange seal structure and first apron 12 structure, need not to additionally weld the flange structure in first valve opening 121 department, reduced welding deformation, also reduced spare part quantity on the valve body 1, the leakproofness is good, even can not appear leaking under the earthquake operating mode yet, safety level is high.
In the present embodiment, the drive mechanism 2 is attached to the valve body frame 11 of the valve body 1; specifically, the driving mechanism 2 is an air cylinder or a hydraulic cylinder, and a connecting plate of a driving part of the air cylinder or the hydraulic cylinder is hermetically connected to a top plate of the valve body frame 11 through an O-shaped sealing ring so as to improve the connection sealing property between the driving part and the valve body frame 11; the drive rod 21 of the cylinder or hydraulic cylinder extends into the valve body 1. The valve core assembly is slidably connected in the valve body frame 11 and reciprocates along a direction perpendicular to a connecting line direction of the first cover plate 12 and the second cover plate 13 under the action of the driving rod 21.
In the present embodiment, as shown in fig. 2 and 3, the valve core assembly includes a sealing plate 31 and a mounting bracket 32 that are sequentially and alternately arranged along a connecting line direction of the first cover plate 12 and the second cover plate 13, and a plurality of swing rods 33 having one end hinged to the sealing plate 31 and the other end hinged to the mounting bracket 32. The mounting bracket 32 is connected to the drive rod 21 of the drive mechanism 2, and the sealing plate 31 is used to seal the first valve opening 121 of the first cover plate 12. The outer side of the sealing plate 31 is provided with a limiting member, and the valve body 1 is provided with a stop block 122 matched with the limiting member. When the limiting member abuts against the stop block 122, the swing link 33 rotates along with the movement of the mounting block 32 to adjust the distance between the sealing plate 31 and the mounting block 32 so as to press the sealing plate 31 against the flange sealing surface of the first flange structure and close the first valve opening 121. When the swing link 33 moves to a completely horizontal position, the urging force of the swing link 33 against the sealing plate 31 is maximized.
In the vacuum gate valve with the shock-proof function, the sealing plate 31 is movably connected on the mounting frame 32 through a plurality of swing rods 33, during the closing process of the sealing plate 31, the driving mechanism 2 drives the mounting bracket 32 to move downwards, the mounting bracket 32 drives the sealing plate 31 to move downwards together through the swing rod 33, when the sealing plate 31 moves to the position of the stop block 122, the limit piece on the sealing plate 31 abuts against the stop block 122, at this time, the sealing plate 31 cannot move downwards continuously, the mounting frame 32 continues to move downwards under the action of the driving rod 21, the mounting frame 32 drives the swing rod 33 to rotate by a certain angle, so that the swing rod 33 gradually swings to a horizontal position from an inclined position, and the swing rod 33 pushes the sealing plate 31 in a direction away from the mounting frame 32 (i.e. in the direction of the first valve opening 121 on the first cover plate 12) until the sealing plate 31 is pressed against the flange sealing surface of the first flange structure and the first valve opening 121 is closed; when the swing link 33 moves to the completely horizontal position, the pressure of the swing link 33 against the sealing plate 31 reaches the maximum, and the first valve opening 121 is completely closed. The final position of the rocker 33 is at a certain angle above the horizontal position, and the sealing plate 31 is now in a locked state. When the pressure difference of the two sides of the sealing plate 31 is within 1000Pa, the sealing plate 31 can be opened, at the moment, the mounting frame 32 is pulled by the driving rod 21 to move upwards, and the swing rod 33 swings from the horizontal position to the inclined position; at the same time, the sealing plate 31 is moved by the swing link 33 toward the mounting bracket 32 in response to the upward movement of the driving rod 21, and the sealing plate 31 is separated from the first valve opening 121 until the sealing plate 31 is completely opened. According to the vacuum gate valve, in the closing process of the sealing plate 31, the sealing plate 31 is tightly pressed on the flange sealing surface of the first flange structure through the swing rod 33, the acting force of the swing rod 33 on the sealing plate 31 is large and is a rigid acting force, the sealing performance between the sealing plate 31 and the first cover plate 12 is good, and the leakage problem caused by loosening can be avoided even under the earthquake working condition.
In this embodiment, as shown in fig. 3, roller mounting seats 312 are fixedly connected to two opposite sides of the sealing plate 31, the limiting member is specifically a limiting wheel 311 connected to the roller mounting seats 312, and a rolling surface of the limiting wheel 311 abuts against an inner side surface of the first cover plate 12 facing the second cover plate 13. The limiting wheel 311 plays a role in guiding and supporting the movement of the sealing plate 31, and can reduce friction and noise in the movement process of the sealing plate 31.
In the present embodiment, as shown in fig. 3 and fig. 4, the stop block 122 is fixedly connected to an inner side wall of the first cover plate 12 facing the second cover plate 13, and a groove 123 for placing the limiting member is disposed on the inner side wall of the first cover plate 12 facing the second cover plate 13 and located on one side of the stop block 122. When the limiting wheel 311 moves to a position abutting against the stop block 122, the swing rod 33 can push the sealing plate 31 to move towards a direction close to the first cover plate 12, and the limiting wheel 311 can roll into the groove 123, so that the influence of the acting force between the limiting wheel 311 and the first cover plate 12 on the sealing between the sealing plate 31 and the first cover plate 12 is reduced.
In the present embodiment, as shown in fig. 3, the mounting frame 32 includes an upper cross member 321, a lower cross member 322, and a plurality of longitudinal members 323 arranged in parallel and fixedly connected between the upper cross member 321 and the lower cross member 322; the upper transverse beam 321 is connected to the drive rod 21 of the drive mechanism 2, the longitudinal beam 323 is connected to a plurality of top wheels 34 arranged around the first valve opening 121, and the rolling surfaces of the top wheels 34 abut against the second cover plate 13. The top wheels 34 may be mounted inside the longitudinal beams 323, the surfaces of the longitudinal beams 323 facing the second cover plate 13 or the side walls of the longitudinal beams 323, as long as the rolling surfaces of the top wheels 34 abut against the second cover plate 13. The top wheel 34 plays a role in guiding and supporting the movement of the mounting frame 32, and when the sealing plate 31 is subjected to the pressure of the external atmospheric pressure, the pressure can be transmitted to the second cover plate 13 through the swing rod 33, the longitudinal beam 323 and the top wheel 34, so that the sealing plate 31 can be pushed against the atmospheric pressure, the bidirectional sealing of the valve is realized, and a good sealing state can be maintained even under the condition of abnormal atmospheric pressure; in addition, the top wheel 34 can also reduce friction during relative movement between the mounting frame 32 and the second cover plate 13.
In this embodiment, as shown in fig. 3, the two opposite ends of the upper cross beam 321 and the lower cross beam 322 are respectively provided with the side wheel 36, and the rolling surfaces of the side wheels 36 are abutted against the inner wall surface of the valve body frame 11, so that the mounting frame 32 can be guided in movement, and the friction resistance in the movement process can be reduced.
In this embodiment, as shown in fig. 3, a through hole for passing the driving rod 21 is provided on the upper cross beam 321, a portion of the driving rod 21 passing through the upper cross beam 321 is fixedly connected to the fixing seat 4 located on one side of the upper cross beam 321, and a fixing ring 5 sleeved on the driving rod 21 is provided on the other side of the upper cross beam 321. The fixing seat 4 is fixedly connected to the driving rod 21 through a screw, the fixing ring 5 is in threaded connection with the driving rod 21, and the upper cross beam 321 is located between the fixing ring 5 and the fixing seat 4. The upper beam 321 is fixed by matching the fixed seat 4 and the fixed ring 5, so that a certain redundancy is reserved and the requirement of anti-loosening tightness is met.
In the present embodiment, as shown in fig. 3, one end of each of the swing links 33 is hinged to the longitudinal beam 323 by a pin 35, and four swing links 33 are uniformly distributed around the center of the sealing plate 31. So set up, can realize the even atress everywhere of closing plate 31, closing plate 31 switching process strikes for a short time, and the operation noise is low. Preferably, the top wheel 34 installed inside the vertical rod is also rotatably connected to the pin shaft 35, that is, the swing rod 33 can rotate around the same pin shaft 35 with the top wheel 34, and since the rolling surface of the top wheel 34 abuts against the second cover plate 13, the second cover plate 13 has a reaction force on the pin shaft 35 through the top wheel 34, so that the pin shaft 35 is prevented from loosening, the shaking of the swing rod 33 under the earthquake working condition can be reduced, and the earthquake-proof function is stronger. Specifically, the pin shaft 35 is connected with a locking nut through a thread, and the locking nut is used for locking the horizontal position of the oscillating bar 33.
In the present embodiment, as shown in fig. 3 and 5, a mounting groove 313 is disposed at a position of the sealing plate 31 corresponding to the swing link 33, a mounting seat 37 is mounted in the mounting groove 313, one end of the swing link 33 is rotatably connected to the mounting seat 37 through a rotating shaft 38, nuts are respectively screwed at two ends of the rotating shaft 38, a gasket is disposed between the nut and the swing link 33, and the swing link 33 can be firmly fixed on the rotating shaft 38 in the horizontal direction by tightening a pair of nuts, so that the swing link 33 is not easily loosened. The periphery wall of mount pad 37 is equipped with ring groove 371, and the periphery lateral wall of mounting groove 313 is equipped with the arc draw-in groove 314 that corresponds the setting with ring groove 371 position, is equipped with rand 39 in the space between ring groove 371 and the arc draw-in groove 314, still is equipped with on the closing plate 31 with the communicating notch of mounting groove 313 to inlay rand 39 and establish into in the clearance between ring groove 371 and the arc draw-in groove 314, in order to prevent that mount pad 37 from appearing not hard up. In the installation, to establishing rand 39 on ring groove 371 of mount pad 37, rand 39 is in the elasticity state of tightening this moment, then puts into mounting groove 313 with rand 39 in rand 39 together, rand 39 outwards expands under self elasticity effect, and the part embedding arc draw-in groove 314 of rand 39 to realize mount pad 37's anticreep design. The part of the clamping ring 39 extending to the notch can be provided with a mounting hole, and the clamping ring 39 is fixed by a fastening piece such as a pin penetrating through the mounting hole, so that the mounting seat 37 and the sealing plate 31 can be reliably connected even under the earthquake working condition. Specifically, rand 39 is the annular rand that has the opening, and the inside wall of rand 39 is equipped with a plurality of recesses, and a plurality of recesses not only can increase rand 39's elastic deformation ability, can also prevent rand 39 around the central axis rotation, and stability is better.
In the present embodiment, an annular sealing groove is provided on the surface of the sealing plate 31 facing the first cover plate 12, and an annular radiation-resistant sealing ring 6 is provided in the sealing groove. The sealing ring 6 is made of ethylene propylene diene monomer rubber, the radiation-resistant sealing ring 6 made of the material can adapt to the irradiation environment in the nuclear industry environment, the long-term sealing performance of the sealing plate 31 is guaranteed, and the sealing plate 31 has the effects of shock resistance, radiation resistance, high reliability and long service life in the application of the nuclear power field.
In conclusion, the vacuum gate valve with the anti-seismic function provided by the embodiment of the invention adopts an integrated valve body design, so that the vacuum gate valve is good in sealing performance, strong in anti-seismic capacity, capable of being normally used under extreme earthquake working conditions and high in safety level; and has the two-way sealing function, and the closing plate 31 strikes little, advantage such as running noise low in the switching process.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims (10)

1. A vacuum gate valve with shock resistant function comprising:
the valve body (1) comprises a valve body frame (11), and a first cover plate (12) and a second cover plate (13) which are respectively connected to two opposite sides of the valve body frame (11), wherein a first valve opening (121) is formed in the first cover plate (12), and a second valve opening (131) is formed in the second cover plate (13);
the valve core assembly is connected in the valve body frame (11) in a sliding manner and reciprocates along the direction vertical to the connecting line direction of the first cover plate (12) and the second cover plate (13) under the action of the driving mechanism (2);
the method is characterized in that:
a first flange structure positioned at the periphery of the first valve opening (121) is integrally formed on the first cover plate (12), and two side surfaces of the first flange structure are flange sealing surfaces; when the valve core assembly is in a closed state, the valve core assembly is abutted to the flange sealing surface.
2. The vacuum gate valve with the shock-proof function according to claim 1, wherein the valve core assembly comprises a sealing plate (31) and a mounting frame (32) which are sequentially arranged at intervals along a connecting line direction of the first cover plate (12) and the second cover plate (13), and a plurality of swing rods (33) with one ends hinged to the sealing plate (31) and the other ends hinged to the mounting frame (32); the mounting frame (32) is connected with a driving rod (21) of the driving mechanism (2);
a limiting piece is arranged on the outer side of the sealing plate (31), and a stop block (122) matched with the limiting piece is arranged on the valve body (1);
when the limiting piece abuts against the stop block (122), the swing rod (33) rotates along with the movement of the mounting frame (32) to adjust the distance between the sealing plate (31) and the mounting frame (32) so as to press the sealing plate (31) against the flange sealing surface of the first flange structure and close the first valve opening (121).
3. The vacuum gate valve with the shock-proof function according to claim 2, wherein the limiting members are limiting wheels (311) connected to two opposite sides of the sealing plate (31), and rolling surfaces of the limiting wheels (311) are abutted against inner side surfaces of the first cover plate (12) facing the second cover plate (13).
4. The vacuum gate valve with the shock-proof function according to claim 2, wherein the stop block (122) is connected to the inner side wall of the first cover plate (12) facing the second cover plate (13), and a groove (123) for placing the limiting member is formed in the inner side wall of the first cover plate (12) facing the second cover plate (13) and located on one side of the stop block (122).
5. Vacuum gate valve with anti-seismic function according to claim 2, characterized in that said mounting frame (32) comprises an upper cross beam (321), a lower cross beam (322) and a plurality of longitudinal beams (323) connected between said upper cross beam (321) and said lower cross beam (322); the upper cross beam (321) is connected to a driving rod (21) of the driving mechanism (2), the longitudinal beam (323) is connected with a plurality of top wheels (34) arranged around the first valve opening (121), and rolling surfaces of the top wheels (34) are abutted to the second cover plate (13).
6. The vacuum gate valve with the shock-resistant function according to claim 5, wherein a through hole for the driving rod (21) to pass through is formed in the upper cross beam (321), a part of the driving rod (21) passing through the upper cross beam (321) is fixedly connected with a fixing seat (4) located on one side of the upper cross beam (321), and a fixing ring (5) sleeved on the driving rod (21) is arranged on the other side of the upper cross beam (321).
7. The vacuum gate valve with the shock-resistant function according to claim 5, wherein one end of the swing link (33) is hinged to the longitudinal beam (323) through a pin shaft (35), and the swing links (33) are distributed uniformly around the center of the sealing plate (31).
8. The vacuum gate valve with the shock-proof function according to claim 2, wherein a mounting groove (313) is formed in a position, corresponding to the swing rod (33), of the sealing plate (31), a mounting seat (37) is mounted in the mounting groove (313), and one end of the swing rod (33) is rotatably connected to the mounting seat (37) through a rotating shaft (38).
9. The vacuum gate valve with the shock-resistant function according to claim 8, wherein a ring-shaped clamping groove (371) is formed in the mounting seat (37), an arc-shaped clamping groove (314) correspondingly arranged to the ring-shaped clamping groove (371) is formed in the side wall of the mounting groove (313), and a clamping ring (39) is arranged in a space between the ring-shaped clamping groove (371) and the arc-shaped clamping groove (314).
10. Vacuum gate valve with anti-seismic function according to claim 2, characterized in that the surface of the sealing plate (31) facing the first cover plate (12) is provided with a sealing groove in which a radiation-resistant sealing ring (6) is arranged.
CN202110487706.5A 2021-04-30 2021-04-30 Vacuum gate valve with antidetonation function Pending CN114060545A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110487706.5A CN114060545A (en) 2021-04-30 2021-04-30 Vacuum gate valve with antidetonation function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110487706.5A CN114060545A (en) 2021-04-30 2021-04-30 Vacuum gate valve with antidetonation function

Publications (1)

Publication Number Publication Date
CN114060545A true CN114060545A (en) 2022-02-18

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110487706.5A Pending CN114060545A (en) 2021-04-30 2021-04-30 Vacuum gate valve with antidetonation function

Country Status (1)

Country Link
CN (1) CN114060545A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116045018A (en) * 2023-03-30 2023-05-02 成都中科唯实仪器有限责任公司 Large-caliber rectangular gate valve

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116045018A (en) * 2023-03-30 2023-05-02 成都中科唯实仪器有限责任公司 Large-caliber rectangular gate valve
CN116045018B (en) * 2023-03-30 2023-07-04 成都中科唯实仪器有限责任公司 Large-caliber rectangular gate valve

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