A valve core adjustable vacuum valve

Abstract

The present invention relates to the technical field of vacuum valves. The present invention provides a vacuum valve with an adjustable valve core, comprising a shell and a valve plate. The shell is provided with a rocker drive mechanism for driving the valve plate to slide linearly in the shell. One side of the valve plate is connected to a back plate through an elastic member. An adjusting ring is movably abutted between the back plate and the valve plate. An adjusting block is adjustably connected to the adjusting ring. The rocker drive mechanism movably abuts against the adjusting block, thereby toggling the adjusting ring to limit rotation to change the distance between the back plate and the valve plate, thereby achieving valve closing and sealing, ensuring effective sealing of the pipe mouth, simplifying the operation process, and improving convenience of use. By adjusting the relative position of the bolt hole and the connecting strip hole, adjustable assembly of the adjusting block and the adjusting ring is achieved. The rocker drive mechanism is adjusted to start toggling the initial position of the adjusting block, thereby adjusting the rotation angle of the adjusting ring, solving the problem of high valve opening noise, and improving assembly efficiency and a high yield rate of finished products in one go.

Description

Technical Field

[0001] The invention relates to the technical field of vacuum valves, and in particular to a valve core adjustable vacuum valve. Background Art

[0002] A vacuum valve is a valve used to change the flow conductance of a vacuum pipeline, cut off or connect pipelines, and adjust the amount of gas flow in a vacuum system. Traditional vacuum valves usually use a vertical arrangement of the power source, which occupies a large volume and may cause interference when used to connect equipment in a narrow space. In addition, the valve core of most vacuum valves cannot be adjusted, which requires high precision in product processing and assembly, and is prone to low product yield and lack of maintainability. At the same time, existing vacuum valves often have vibration noise caused by impact at the moment of opening the valve. Summary of the invention

[0003] The purpose of the present invention is to provide a vacuum valve with adjustable valve core to solve the above technical problems, with compact structure, easy operation, solve the problem of high valve opening noise, improve assembly efficiency and high yield of finished products.

[0004] The present invention is achieved through the following technical scheme: a valve core adjustable vacuum valve, including a shell and a valve plate, the shell is provided with a rocker drive mechanism for driving the valve plate to slide linearly in the shell, one side of the valve plate is connected to a back plate through an elastic member, an adjustment ring is movably abutted between the back plate and the valve plate, an adjustment block is adjustably connected to the adjustment ring, and the rocker drive mechanism movably abuts the adjustment block, thereby moving the adjustment ring to limit the rotation to change the distance between the back plate and the valve plate.

[0005] Furthermore, the adjusting block is provided with a connecting strip hole, the adjusting ring is provided with a bolt hole, and the adjusting ring is fastened to the adjusting block by bolts penetrating the connecting strip hole and the bolt hole.

[0006] Furthermore, the adjusting ring is evenly connected with a plurality of balls along the circumferential direction through the connecting sleeve, a plurality of circular grooves for limiting the movement of the balls are provided on the valve plate, and an annular groove for guiding the movement of the balls is provided on the back plate.

[0007] Furthermore, the elastic member is a plurality of evenly arranged spring sheets, which together form a regular polygon inscribed in the inner circle of the adjustment ring, one end of the spring sheet is connected to the valve plate bolt, and the other end of the spring sheet is engaged with a bayonet opening on the back plate.

[0008] Furthermore, the rocker arm driving mechanism includes a cylinder, a rack is connected to the telescopic end of the cylinder, the rack is meshingly connected to a gear, the gear is connected to a rocker arm through a rotating shaft, a pulley is connected to the end of the rocker arm, and a sliding groove for limiting the sliding of the pulley is opened on the valve plate.

[0009] Preferably, the cylinder is connected to a transfer cover which is arranged outside the rack and the gear and connected to the housing, and the transfer cover is provided with a first bearing, a first sealing ring, a second bearing and a second sealing ring which are sequentially sleeved on the rotating shaft.

[0010] Preferably, a dial is provided on the outer surface of the adapter cover, and a rotation indicating block matching the dial is bolted to the top end of the rotating shaft.

[0011] Preferably, a leak detection hole communicating with the first bearing is formed on the side wall of the adapter cover.

[0012] Furthermore, a third sealing ring for abutting the pipe port is arranged on the other side of the valve plate.

[0013] Furthermore, a guide wheel which is linearly slidably connected to the inner wall of the shell is connected to the side of the valve plate.

[0014] The present invention has at least the following advantages and beneficial effects:

[0015] (1) The swing rod driving mechanism is used to flexibly contact the adjusting block, and the adjusting ring is turned to change the distance between the back plate and the valve plate to achieve valve closing and sealing, thus ensuring effective sealing of the pipe orifice;

[0016] (2) By adjusting the relative position of the bolt hole and the connecting strip hole, the adjustable assembly of the adjusting block and the adjusting ring is realized. The initial position of the adjusting block is adjusted to start toggling the adjusting block, thereby adjusting the rotation angle of the adjusting ring, solving the problem of high valve opening noise, and improving assembly efficiency and high yield of finished products.

[0017] (3) A circular groove is provided on the valve plate to limit the movement of the ball, a sliding groove is provided on the back plate to guide the ball, and when the adjusting ring rotates, the ball does not completely roll out of the circular groove. The elastic member provided between the valve plate and the back plate can realize easy valve opening, thereby improving the convenience of operation;

[0018] (4) The cylinder drives the rack to make linear reciprocating motion, thereby rotating the gear meshing with it, and driving the swing arm to swing back and forth through the transmission of the rotating shaft, realizing the power transmission from the end face linear power source to the swing of the actuator end. The overall structure is compact, which solves the problem of installation space interference and is more suitable for equipment installation occasions with limited vertical space, thereby improving the adaptability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 A schematic structural diagram of a valve core adjustable vacuum valve provided by the present invention;

[0021] Figure 2 A partial cross-sectional view of a valve core adjustable vacuum valve provided by the present invention;

[0022] Figure 3 A schematic diagram of the meshing of a rack and a gear in a valve core adjustable vacuum valve provided by the present invention;

[0023] Figure 4 A schematic diagram of the connection between a valve plate and a back plate in a vacuum valve with an adjustable valve core provided by the present invention;

[0024] Figure 5 A side cross-sectional view of the connection between a valve plate and a back plate in a valve core adjustable vacuum valve provided by the present invention;

[0025] Figure 6 A schematic structural diagram of one side of a valve plate in a vacuum valve with an adjustable valve core provided by the present invention;

[0026] Figure 7 A schematic diagram of the structure of the other side of a valve plate in a vacuum valve with adjustable valve core provided by the present invention;

[0027] Figure 8 A schematic diagram of the structure of an adjusting ring in a valve core adjustable vacuum valve provided by the present invention;

[0028] Fig. 9 A schematic diagram of the structure of an adjusting block in a vacuum valve with an adjustable valve core provided by the present invention;

[0029] Fig.10 A schematic diagram of the structure of a back plate in a vacuum valve with adjustable valve core provided by the present invention;

[0030] Fig.11 A partial side cross-sectional view of a back plate of a vacuum valve with adjustable valve core provided by the present invention;

[0031] Fig.12 A schematic diagram of the structure of a guide wheel in a vacuum valve with an adjustable valve core provided by the present invention;

[0032] Fig.13 A schematic diagram of the initial movement of a vacuum valve with an adjustable valve core provided by the present invention;

[0033] Fig.14 A schematic diagram of a closed but unsealed state of a vacuum valve with an adjustable valve core provided by the present invention;

[0034] Fig.15 A schematic diagram of a closed and sealed state of a vacuum valve with an adjustable valve core provided by the present invention;

[0035] Fig.16 A schematic diagram of the connection between an adjusting ring and an adjusting block in a valve core adjustable vacuum valve provided by the present invention;

[0036] Icons: 1-housing, 2-rocker drive mechanism, 21-cylinder, 22-rack, 23-gear, 24-rotating shaft, 25-swing arm, 26-pulley, 27-rotation indicator block, 3-valve plate, 30-circular groove, 31-slide groove, 311-straight section, 312-arc section, 32-third sealing ring, 4-elastic part, 5-adjusting ring, 50-bolt hole, 51-connecting sleeve, 52-ball, 6-adjusting block, 60-connecting bar hole, 61-slot, 7-back plate, 70-ring groove, 71-bayonet, 8-adapter cover, 80-leak detection hole, 81-first bearing, 82-second bearing, 83-first sealing ring, 84-second sealing ring, 85-dial, 9-guide wheel. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] Example

[0040] like Figure 1-16As shown, in this embodiment, a valve core adjustable vacuum valve is mainly disclosed, a housing 1 is provided with a swing rod driving mechanism 2 for driving a valve plate 3 to slide linearly in the housing 1, one side of the valve plate 3 is connected to a back plate 7 through an elastic member 4, an adjusting ring 5 is movably abutted between the back plate 7 and the valve plate 3, an adjusting block 6 is adjustably connected to the adjusting ring 5, and the swing rod driving mechanism 2 movably abuts against the adjusting block 6, so that the adjusting ring 5 is limitedly rotated to change the distance between the back plate 7 and the valve plate 3; specifically, the vacuum valve is installed between the flanges of the existing two sections of the pipe mouth to realize the switch valve and flow regulation; The rod drive mechanism 2 can be used as a power source for driving the valve plate 3 to slide linearly in the shell 1, and can also be used as a power source for rotating the dial adjustment ring 5, which simplifies the operation process and improves the convenience of use; one side of the valve plate 3 is connected to the back plate 7 to act on the pipe mouth flange at the outlet end of the vacuum valve, and the other side of the valve plate 3 is provided with a third sealing ring 32 for abutting the pipe mouth flange, which acts on the pipe mouth flange at the inlet end of the vacuum valve. It should be noted that the inner diameter of the third sealing ring 32 should be larger than the inner diameter of the pipe mouth flange, so that the third sealing ring 32 abuts against the flange end wall to ensure effective sealing of the pipe mouth.

[0041] Furthermore, in the specific implementation, Figure 8 , 9 As shown in Figures 16 and 16, the adjusting block 6 provided in the embodiment of the present invention is provided with a connecting strip hole 60, and the adjusting ring 5 is provided with a bolt hole 50. The adjusting ring 5 is fastened to the adjusting block 6 by bolts penetrating the connecting strip hole 60 and the bolt hole 50. Specifically, in the present embodiment, the adjusting block 6 is provided with a clamping groove 61, so that the cross section of the adjusting block 6 is formed in a stepped shape, and the wall surface of the clamping groove 61 is an arc surface that fits the edge of the adjusting ring 5, so that the adjusting block 6 and the adjusting ring 5 form a superimposed surface at the bottom surface of the clamping groove 61. The connecting strip hole 60 can be an arc hole that the bolt hole 50 sweeps through a range of circular motion with the center of the adjusting ring 5 as the center. By adjusting the relative position of the bolt hole 50 and the connecting strip hole 60, the initial position of the rocker drive mechanism 2 starting to move the adjusting block 6 is determined. If the initial action position is adjusted forward, the rotation angle of the adjusting ring 5 increases, the spacing between the valve plate 3 and the back plate 7 becomes larger, and thus the compression rate of the third sealing ring 32 becomes larger, and the sealing becomes more reliable. On the contrary, if the sealing amount is too large, the valve opening noise becomes large. The initial action position can be adjusted backward to reduce a certain sealing compression rate and effectively alleviate the problem of valve opening noise. In addition, the adjustable assembly design of the adjustment block 6 and the adjustment ring 5 can effectively solve the problem of insufficient product precision caused by errors, improve assembly efficiency and high yield of finished products in one time, and because the position adjustment is convenient, it also has great technical and economic advantages in the maintenance of later products.

[0042] Furthermore, in the specific implementation, Figure 5 , 6As shown in Figures 8, 10 and 11, the adjusting ring 5 provided in the embodiment of the present invention is evenly connected with a plurality of balls 52 along the circumferential direction through a connecting sleeve 51, a plurality of circular socket grooves 30 for limiting the movement of the balls 52 are provided on the valve plate 3, and an annular groove 70 for guiding the movement of the balls 52 is provided on the back plate 7; specifically, two relatively independent rolling balls 52 are movably limitedly connected in the connecting sleeve 51, and the outer ends of the two balls 52 are respectively abutted and limited in the circular socket groove 30 and the annular groove 70. It should be noted that the circular socket groove 30 is flat from the outer edge to the bottom. The groove is smooth and convergent, and the outer diameter of the circular socket groove 30 is larger than the diameter of the ball 52. The circular socket groove 30 is evenly and discretely distributed on the valve plate 3, and the annular groove 70 is a continuous circular ring on the back plate 7, which plays a role of limiting and guiding. Initially, the ball 52 in contact with the valve plate 3 is located at the bottom of the circular socket groove 30. The adjusting ring 5 is rotated by the adjusting block 6, so that the ball 52 moves upward from the bottom of the circular socket groove 30 along the arc wall of the circular socket groove 30 without sliding out of the circular socket groove 30, so that the valve plate 3 and the back plate 7 are stretched apart, and the distance between the valve plate 3 and the back plate 7 is changed.

[0043] Furthermore, in the specific implementation, Figure 5 , 10 As shown, the elastic member 4 provided in the embodiment of the present invention is a plurality of evenly arranged spring sheets, which together form a regular polygon inscribed in the inner circle of the adjusting ring 5. One end of the spring sheet is bolted to the valve plate 3, and the other end of the spring sheet is snapped into the bayonet 71 provided on the back plate 7, which effectively disperses the points of force application and ensures the smooth application of force on the back plate 7. When the adjusting ring 5 opens the valve plate 3 and the back plate 7, the spring sheet is pulled to maintain elastic restoring force.

[0044] Furthermore, in the specific implementation, Figure 1-3 As shown in Figures 5 and 6, the swing arm driving mechanism 2 provided in the embodiment of the present invention comprises a cylinder 21, a rack 22 is connected to the telescopic end of the cylinder 21, the rack 22 is meshedly connected to the gear 23, the gear 23 is connected to the swing arm 25 via a rotating shaft 24, a pulley 26 is connected to the end of the swing arm 25, and a slide groove 31 for the sliding of the limiting pulley 26 is provided on the valve plate 3; specifically, the cylinder 21 drives the rack 22 to make a linear reciprocating motion, thereby rotating the gear 23 meshed therewith, and drives the swing arm 25 to swing back and forth through the transmission of the rotating shaft 24, thereby realizing the power transmission from the end face linear power source to the execution end swing, and the overall structure is compact, which can solve the problem of interference in the installation space, and is more suitable for equipment installation occasions with limited vertical space, thereby improving the adaptability of the device; it should be noted that, Figure 6 , 7As shown, the slide groove 31 is composed of a straight section 311 and an arc section 312 arranged along the width direction of the valve plate 3, and the straight section 311 and the arc section 312 have a smooth transition of the arc. The pulley 26 slides in the straight section 311, and the corresponding swing arm 25 drives the valve plate 3 to slide linearly in the housing 1, so as to realize the linear movement process of the switch valve and flow regulation. The pulley 26 slides in the arc section 312, and the corresponding swing arm 25 drives the pulley 26 to abut the adjusting block 6 to turn the adjusting ring 5 to rotate, so as to realize the valve closing and sealing and the valve unsealing and opening. At the same time, the pulley 26 slides to the end of the arc section 312, which can be locked and continuously abuts the adjusting block 6, so that the adjusting ring 5 maintains the position after rotation, and the ball 52 stays on the inclined surface of the circular socket groove 30.

[0045] Preferably, if Figure 1 , 2 As shown, the cylinder 21 is connected to a transfer cover 8 which is covered outside the rack 22 and the gear 23 and connected to the housing 1. The transfer cover 8 is provided with a first bearing 81, a first sealing ring 83, a second bearing 82 and a second sealing ring 84 which are sequentially sleeved on the rotating shaft 24. Specifically, in order to facilitate loading and unloading and maintenance, the transfer cover 8 can be assembled from an upper and lower part. The first bearing 81 is clamped in the upper part of the transfer cover 8. The outer ring of the first bearing 81 is relatively fixed to the transfer cover 8, and the inner ring thereof rotates synchronously with the rotating shaft 24. A sleeve is nested and fixed at the lower part of the transfer cover 8. The upper and lower parts of the transfer cover 8 are connected. A sealing ring sleeved on the sleeve is provided at the connection, and the second bearing 82 is clamped in the sleeve. The outer ring of the second bearing 82 is relatively fixed to the sleeve, and its inner ring rotates synchronously with the rotating shaft 24. There is a certain span between the first bearing 81 and the second bearing 82, which provides effective support for the stable rotation of the rotating shaft 24; the first sealing ring 83 is arranged between the first bearing 81 and the sleeve, and the second sealing ring 84 is clamped in the sleeve to realize double-layer dynamic sealing, ensuring the sealing and reliability of the component connection and operation, and at the same time facilitating the later replacement and maintenance of bearings and sealing rings, thereby improving the convenience of maintenance.

[0046] Preferably, as shown in Figures 1 and 2, a dial 85 is provided on the outer surface of the adapter cover 8, and a rotation indicator block 27 that cooperates with the dial 85 is bolted to the top of the rotating shaft 24; specifically, a mounting hole is opened at the top of the adapter cover 8, and the rotation indicator block 27 is clearance-fitted in the mounting hole and is bolted to the rotating shaft 24, and rotates synchronously with the rotating shaft 24; the dial 85 is arranged around the mounting hole as a position reference, which can clearly display the current valve state and provide the operator with a mechanical indication of the switch valve, so that the operator can monitor and adjust the valve more intuitively, thereby improving the convenience and accuracy of operation.

[0047] Preferably, as shown in FIG. 2 , a leak detection hole 80 communicating with the first bearing 81 is provided on the side wall of the adapter cover 8 to facilitate efficient leak detection of the finished dynamic seal at a later stage.

[0048] Furthermore, in the specific implementation, Figure 4 , 12 As shown, the side of the valve plate 3 provided in the embodiment of the present invention is connected to a guide wheel 9 which is linearly slidably connected to the inner wall of the shell 1; additional support and limiting functions are provided, so that the valve plate 3 remains stable during the operation and prevents damage caused by offset.

[0049] like Fig.13 As shown, it is a schematic diagram of the initial movement of the vacuum valve provided in this embodiment. In this state, the piston of the cylinder 21 moves, driving the rack 22 to make a linear motion, driving the gear 23 and the rotating shaft 24 fixed thereto to rotate, and the rotation drives the swing arm 25 fixed thereto to swing, and the pulley 26 on the swing arm 25 slides in the slide groove 31, thereby driving the valve plate 3 to slide along the inner wall of the shell 1, one side of the ball 52 is in the bottom center of the circular groove 30 and does not slide out, and the other side of the ball 52 is in the annular groove 70 of the back plate 7, and the valve plate 3 and the back plate 7 are in a retracted state.

[0050] like Fig.14 As shown, it is a schematic diagram of the state in which the vacuum valve provided in this embodiment is closed but not sealed. The piston of the cylinder 21 continues to move, driving the rack 22 to make a linear motion, driving the gear 23 and the rotating shaft 24 fixed thereto to rotate, and the rotation of the rotating shaft 24 drives the swing arm 25 fixed thereto to swing, and the pulley 26 on the swing arm 25 just moves to a position in contact with the adjusting block 6. At this time, the third sealing ring 32, the adjusting ring 5 and the back plate 7 are coaxially arranged with the pipe flange.

[0051] like Fig.15 As shown, it is a schematic diagram of the closed and sealed state of the vacuum valve provided in this embodiment. The piston of the cylinder 21 continues to move, driving the rack 22 to make a linear motion, driving the gear 23 and the rotating shaft 24 fixed thereto to rotate, and the rotation of the rotating shaft 24 drives the swing arm 25 fixed thereto to swing, and the pulley 26 on the swing arm 25 moves the adjustment block 6 to rotate the adjustment ring 5, and the ball 52 on one side gradually slides out along the circular groove 30, and the ball 52 on the other side rolls in a circle in the annular groove 70 of the back plate 7, thereby pushing the back plate 7 to move toward the pipe mouth flange at the same end. When the back plate 7 moves to a limit position and abuts against the pipe mouth flange at the same end, the valve plate 3 is pushed in the reverse direction to move toward the pipe mouth flange at the other end until the limit position is reached. At this time, the adjustment ring 5 opens the valve plate 3 and the back plate 7, and the swing arm 25 stops moving in the rear arc section 312 and abuts against the adjustment block 6 to achieve self-locking. The ball 52 stays on the inclined surface of the circular groove 30, and the spring sheet maintains a restoring force to release the self-locking when the valve is opened;

[0052] Valve opening process: the piston of the cylinder 21 moves in the opposite direction, driving the rack 22 to make a linear motion in the opposite direction, driving the gear 23 and the rotating shaft 24 fixed thereto to rotate in the opposite direction, driving the swing arm 25 fixed thereto to rotate in the opposite direction, and the pulley 26 slides in the opposite direction from the end position of the arc segment 312. At this time, under the elastic restoring force of the spring sheet and the force of the inclined surface of the circular socket groove 30 on the ball 52, the ball 52 gradually returns to the bottom center of the circular socket groove 30, the adjusting ring 5 and the adjusting block 6 fixed thereto gradually return to the initial position, the valve plate 3 and the back plate 7 approach each other and gradually close together, and after the ball 52 returns to the bottom center of the circular socket groove 30, the adjusting ring 5 stops rotating, and the pulley 26 slides in the straight section 311 of the slide groove 31, and begins to drive the valve plate 3 to move in a straight line along the inner wall of the shell 1 until the stroke of the cylinder 21 is completed, completing the entire valve opening action.

[0053] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A valve core adjustable vacuum valve, comprising a housing (1) and a valve plate (3), It is characterized in that The housing (1) is provided with a rocker drive mechanism (2) for driving the valve plate (3) to slide linearly in the housing (1); one side of the valve plate (3) is connected to a back plate (7) via an elastic member (4); an adjusting ring (5) is movably abutted between the back plate (7) and the valve plate (3); an adjusting block (6) is adjustably connected to the adjusting ring (5); the rocker drive mechanism (2) movably abuts against the adjusting block (6), thereby moving the adjusting ring (5) to rotate in a limited position to change the distance between the back plate (7) and the valve plate (3); The adjusting block (6) is provided with a connecting bar hole (60), and the adjusting ring (5) is provided with a bolt hole (50). The adjusting ring (5) is fastened to the adjusting block (6) by bolts penetrating the connecting bar hole (60) and the bolt hole (50). The connecting bar hole (60) is an arc-shaped hole in a range swept by the bolt hole (50) in a circular motion with the center of the adjusting ring (5) as the center. By adjusting the relative position of the bolt hole (50) and the connecting bar hole (60), the initial position of the swing rod driving mechanism (2) starting to move the adjusting block (6) is determined.

2. A valve core adjustable vacuum valve as claimed in claim 1, It is characterized in that The adjusting ring (5) is evenly connected to a plurality of balls (52) along the circumferential direction via a connecting sleeve (51); the valve plate (3) is provided with a plurality of circular grooves (30) for limiting the movement of the balls (52); and the back plate (7) is provided with an annular groove (70) for guiding the movement of the balls (52).

3. A valve core adjustable vacuum valve as claimed in claim 1, It is characterized in that The elastic member (4) is a plurality of evenly arranged spring sheets, which together form a regular polygon inscribed in the inner circle of the adjustment ring (5); one end of the spring sheet is bolted to the valve plate (3), and the other end of the spring sheet is snap-fitted to a bayonet (71) provided on the back plate (7).

4. A valve core adjustable vacuum valve as claimed in claim 1, It is characterized in that The swing arm driving mechanism (2) comprises a cylinder (21), the telescopic end of the cylinder (21) is connected to a rack (22), the rack (22) is meshingly connected to a gear (23), the gear (23) is connected to a swing arm (25) via a rotating shaft (24), the end of the swing arm (25) is connected to a pulley (26), and a slide groove (31) for limiting the sliding of the pulley (26) is provided on the valve plate (3).

5. A valve core adjustable vacuum valve as claimed in claim 4, It is characterized in that The cylinder (21) is connected to a transfer cover (8) which is arranged outside the rack (22) and the gear (23) and connected to the housing (1); the transfer cover (8) is provided with a first bearing (81), a first sealing ring (83), a second bearing (82) and a second sealing ring (84) which are sequentially sleeved on the rotating shaft (24).

6. A valve core adjustable vacuum valve as claimed in claim 5, It is characterized in that The outer surface of the adapter cover (8) is provided with a dial (85), and the top end of the rotating shaft (24) is bolted with a rotation indicating block (27) that matches the dial (85).

7. A valve core adjustable vacuum valve as claimed in claim 5, It is characterized in that The side wall of the adapter cover (8) is provided with a leak detection hole (80) which is in communication with the first bearing (81).

8. A valve core adjustable vacuum valve as claimed in claim 1, It is characterized in that The other side of the valve plate (3) is provided with a third sealing ring (32) for abutting against the pipe port.

9. A valve core adjustable vacuum valve as claimed in claim 1, It is characterized in that The side edge of the valve plate (3) is connected to a guide wheel (9) which is linearly slidably connected to the inner wall of the housing (1).

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