A super-large caliber vacuum level sealing gate valve

Abstract

The application relates to the technical field of gate valves, and particularly discloses a super-large-caliber vacuum-level sealed gate valve, which comprises a valve body and a lower valve rod, the bottom end of the valve body is fixedly connected with a valve seat, the top of the valve body is movably provided with an upper valve rod, the bottom end of the upper valve rod is fixedly connected with the lower valve rod, the lower valve rod is plate-shaped, the cross section of the lower valve rod is a combination of a wedge shape and a profile shape, both sides of the lower valve rod are provided with a double-gate plate mechanism comprising a first gate plate and a second gate plate, the top of the valve seat is provided with a first sealing mechanism comprising a first C-shaped block on both sides, and the top of the inlet and outlet of the bottom of the valve body is provided with a second sealing mechanism comprising a second C-shaped block on both sides. The lower valve rod exerts force on the wedge-shaped groove, so that the first sealing surface and the second sealing surface respectively exert extrusion force on the first sealing end and the second sealing end, the sealing surfaces fully abut and continuously exert extrusion force, and the vacuum-level sealing effect is achieved.

Description

Technical Field

[0001] This invention relates to the field of gate valve technology, and in particular to an ultra-large diameter vacuum-sealed gate valve. Background Technology

[0002] Gate valves have a wide range of applications and are commonly found in pipelines transporting various fluids for purposes such as flow control.

[0003] Traditional gate valves use a gate pressed against the sealing surface of the valve body to cut off flow. This type of gate valve is often small in diameter. However, in some ultra-large diameter pipelines, the working fluid often has the characteristics of high velocity, high pressure and large flow rate. When the gate valve is opened or closed, the gate often bears a lot of resistance. This resistance makes it difficult to open and close the gate, and it will also cause increased friction between the gate and the sealing surface during the opening and closing process, resulting in wear of the sealing surface. This affects the sealing effect of the gate valve and reduces its service life. At the same time, due to the large diameter, after the gate valve is closed, the pressure of the working fluid and its potential corrosiveness will corrode the sealing surface, which will also affect the sealing effect. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing an ultra-large diameter vacuum-sealed gate valve.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A large-diameter vacuum-sealed gate valve includes a valve body and a lower valve stem. A valve seat is fixedly connected to the bottom end of the valve body, and an upper valve stem is movably arranged on the top of the valve body. A lower valve stem is fixedly connected to the bottom end of the upper valve stem. The lower valve stem is plate-shaped, and its cross-section is a combination of wedge shape and profile shape. A double gate mechanism including a first gate and a second gate is arranged on both sides of the lower valve stem. A first sealing mechanism including a first C-shaped block is arranged on both sides of the top of the valve seat. A second sealing mechanism including a second C-shaped block is arranged on both sides of the bottom inlet and outlet top of the valve body.

[0007] The lower valve stem is provided with a first gate plate and a second gate plate fixedly connected by hexagonal screws on both sides. The opposing surfaces of the first gate plate and the second gate plate are provided with wedge-shaped grooves that are adapted to the lower valve stem but larger in size. The bottom and top of the opposing surfaces of the first gate plate and the second gate plate are respectively provided with a first sealing surface and a second sealing surface. The height of the first sealing surface and the second sealing surface is less than the opening height of the first C-block and the second C-block.

[0008] The valve seat has a first C-shaped block rotatably connected to both sides of the top via a bracket. The length of the first C-shaped block is equivalent to the width of the bottom inlet and outlet of the valve body. The top length of the first C-shaped block is greater than the bottom length. A compression sealing end is fixedly provided at the top end of the first C-shaped block.

[0009] The second C-shaped block is fixedly connected with the second fixed seat on the one side of the second C-shaped block, and the second fixed seat is fixedly connected with the second spring on the one side of the second fixed seat.

[0010] Preferably, the valve cover is fixedly installed at the top end of the valve body, and an actuating mechanism is fixedly arranged at the top end of the valve cover.

[0011] Preferably, a thread is arranged on the outer wall of the upper valve rod, and the thread is in threaded connection with the output end of the actuating mechanism.

[0012] Preferably, a sealing gasket is arranged between the inner hexagonal screw and the extrusion surface of the second gate plate, and a compression spring is arranged in the second gate plate on the side of the sealing gasket.

[0013] Preferably, the first spring is fixedly connected with the first C-shaped block on the one side of the first C-shaped block, and the first fixed seat is fixedly connected with the valve seat on the one side of the first spring.

[0014] Preferably, the magnet is fixedly installed on the opposite surface of the first C-shaped block and the first fixed seat, and the inclination angle of the side wall of the first fixed seat is equivalent to the maximum rotation angle of the first C-shaped block.

[0015] Preferably, the first sealing end corresponding to the first sealing surface is arranged on the two sides of the top of the valve seat, and the second sealing end corresponding to the second sealing surface is arranged on the two sides of the top of the bottom outlet of the valve body.

[0016] Preferably, the second spring is fixedly connected with the second C-shaped block on the one side of the second C-shaped block, and the second fixed seat is fixedly connected with the valve body on the one side of the second spring.

[0017] Preferably, the extrusion sliding blocks are slidingly connected with the top end of the bottom outlet of the valve body, and the oblique edges are arranged on the top and bottom of the opposite surfaces of the two extrusion sliding blocks.

[0018] Compared with the prior art, the present application has the following beneficial effects:

[0019] The application sets the lower valve rod and the double gate plate mechanism, the wedge shape and the profile shape combined structure of the lower valve rod, so that the lower valve rod has a margin during the lifting along the wedge shape groove, that is, when closing the valve, the first gate plate and the second gate plate are first pushed to descend, at this time, the first gate plate and the second gate plate are not subjected to the continuous force of the lower valve rod to the two sides, the first gate plate and the second gate plate do not relatively move away, that is, not completely unfolded, during the abutting of the first sealing surface and the second sealing surface and the first sealing end and the second sealing end, the first sealing surface and the second sealing surface are not easily abraded, and the valve closing can be facilitated, the sealing surfaces are protected, and after the first gate plate and the second gate plate are lowered to the position, the lower valve rod continues to apply the force to the wedge shape groove, at this time, the force is applied to the two sides of the first gate plate and the second gate plate, that is, the first sealing surface and the second sealing surface respectively apply the extrusion force to the first sealing end and the second sealing end, so that the sealing surfaces are fully abutted and continuously subjected to the extrusion force, and the vacuum level sealing effect is realized, and when opening the valve, the lower valve rod is lifted along the wedge shape groove, the force of the lower valve rod to the two sides of the first gate plate and the second gate plate disappears, the extrusion force of the first sealing surface and the second sealing surface to the first sealing end and the second sealing end disappears, at this time, the rising frictional resistance of the first gate plate and the second gate plate can be effectively reduced, the valve opening is more smooth, the abrasion of the sealing surfaces is reduced, the service life of the sealing surfaces is prolonged, and the problems such as leakage are prevented.

[0020] The application sets the first sealing mechanism and the second sealing mechanism, in the process of closing the valve, the first C-shaped block is rotatable, the first sealing surface is pressed, the compression sealing end at the top of the first C-shaped block is abutted with the side wall of the first gate plate and the second gate plate, so that the first C-shaped block protects the first sealing surface and the first sealing end in combination with the side wall of the valve body, without additional power source, the integration of the automatic work of closing the valve, sealing and sealing protection is realized, the vacuum level sealing effect of the continuous extrusion force of the double gate plate mechanism is combined, when the first gate plate and the second gate plate are completely unfolded by the lower valve rod, the first C-shaped block is pushed again, so that the compression sealing end is fully abutted with the side wall of the first gate plate and the second gate plate and continuously extruded, so that the first C-shaped block can fully play the protection function, the continuous action of the fluid working medium on the sealing surfaces is reduced, and the positive role is played on the stable and continuous work of the sealing surfaces, and the second sealing mechanism protects the second sealing surface and the second sealing end through the second C-shaped block, and the first C-shaped block and the second C-shaped block and the first gate plate and the second gate plate do not interfere with each other, and can automatically and stably operate with the action of the lower valve rod. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The application proposes an overall structure schematic diagram of the super large caliber vacuum level sealing gate valve;

[0022] Figure 2 A partial enlarged view of the valve body of the super-large-caliber vacuum-level sealed gate valve according to the present application;

[0023] Figure 3 A structure front view of the valve body of the super-large-caliber vacuum-level sealed gate valve according to the present application;

[0024] Figure 4 A structure schematic diagram of the first gate plate of the super-large-caliber vacuum-level sealed gate valve according to the present application;

[0025] Figure 5 A structure schematic diagram of the inner hexagonal screw of the super-large-caliber vacuum-level sealed gate valve according to the present application;

[0026] Figure 6 A structure schematic diagram of the double-gate plate mechanism of the super-large-caliber vacuum-level sealed gate valve according to the present application;

[0027] Figure 7 A structure schematic diagram of the super-large-caliber vacuum-level sealed gate valve according to the present application; Figure 2 A region structure enlarged view of position A;

[0028] Figure 8 A region structure enlarged view of position B of the super-large-caliber vacuum-level sealed gate valve according to the present application; Figure 2 A region structure enlarged view of position B of the super-large-caliber vacuum-level sealed gate valve according to the present application;

[0029] Figure 9 A structure schematic diagram of the first sealing mechanism of the super-large-caliber vacuum-level sealed gate valve according to the present application;

[0030] Figure 10 A structure schematic diagram of the first C-shaped block of the super-large-caliber vacuum-level sealed gate valve according to the present application;

[0031] Figure 11 A structure schematic diagram of the first C-shaped block of the super-large-caliber vacuum-level sealed gate valve according to the present application;

[0032] Figure 12 A structure schematic diagram of the second sealing mechanism of the super-large-caliber vacuum-level sealed gate valve according to the present application;

[0033] Figure 13 A structure schematic diagram of the sliding groove of the super-large-caliber vacuum-level sealed gate valve according to the present application;

[0034] Figure 14 A structure schematic diagram of the fixed block of the super-large-caliber vacuum-level sealed gate valve according to the present application;

[0035] Figure 15 A structure schematic diagram of the second C-shaped block of the super-large-caliber vacuum-level sealed gate valve according to the present application;

[0036] Figure 16 Figure 1 is a schematic diagram of a lower valve rod structure of a super-large caliber vacuum level sealed gate valve according to the present application.

[0037] In the figure: 1, valve body; 101, valve seat; 2, valve cover; 3, actuator; 4, upper valve rod; 5, lower valve rod; 6, double gate mechanism; 7, first gate; 8, second gate; 9, wedge-shaped groove; 10, first sealing surface; 11, second sealing surface; 12, inner hexagonal screw; 13, sealing gasket; 14, compression spring; 15, first sealing mechanism; 16, first C-shaped block; 17, compression sealing end; 18, first fixed seat; 19, first spring; 20, magnet; 21, second sealing mechanism; 22, second C-shaped block; 23, sliding groove; 24, extrusion sliding block; 25, fixed block; 26, cylinder; 27, guide rod. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all.

[0039] Reference Figures 1-16 A super-large caliber vacuum level sealed gate valve, comprising a valve body 1 and a lower valve rod 5, the bottom end of the valve body 1 is fixedly connected with a valve seat 101, the top of the valve body 1 is movably provided with an upper valve rod 4, the bottom end of the upper valve rod 4 is fixedly connected with the lower valve rod 5, the lower valve rod 5 is plate-shaped, the cross section of the lower valve rod 5 is a combination of wedge-shaped and profiled surfaces, the two sides of the lower valve rod 5 are provided with a double gate mechanism 6 comprising a first gate 7 and a second gate 8, the top of the valve seat 101 is provided on both sides with a first sealing mechanism 15 comprising a first C-shaped block 16, and the top of the bottom inlet and outlet of the valve body 1 is provided on both sides with a second sealing mechanism 21 comprising a second C-shaped block 22;

[0040] The two sides of the lower valve rod 5 are provided with the first gate 7 and the second gate 8 fixedly connected by an inner hexagonal screw 12, the opposite faces of the first gate 7 and the second gate 8 are provided with wedge-shaped grooves 9 which are adapted to the lower valve rod 5 but larger in size, the bottom and top of the opposite faces of the first gate 7 and the second gate 8 are respectively provided with a first sealing surface 10 and a second sealing surface 11, and the heights of the first sealing surface 10 and the second sealing surface 11 are less than the opening height of the first C-shaped block 16 and the second C-shaped block 22;

[0041] The top of the valve seat 101 is rotatably connected on both sides with the first C-shaped block 16 through a support, the length of the first C-shaped block 16 is comparable to the width of the bottom inlet and outlet of the valve body 1, the top length of the first C-shaped block 16 is greater than the bottom length, and the top end of the first C-shaped block 16 is fixedly provided with a compression sealing end 17;

[0042] The second C-shaped block 22 is rotatably connected to the top of the bottom outlet of the valve body 1 through a support on both sides, the length of the second C-shaped block 22 is the same as that of the first C-shaped block 16, the length of the top of the second C-shaped block 22 is smaller than that of the bottom, a sealing structure same as that of the compression sealing end 17 is fixedly arranged at the bottom end of the second C-shaped block 22, and a sliding groove 23 is symmetrically arranged on the top of the second C-shaped block 22.The wedge shape and profile combination structure of the lower valve stem 5 makes there be a margin during the lifting of the lower valve stem 5 along the wedge-shaped groove 9, that is, when closing the valve, the first gate plate 7 and the second gate plate 8 are first pushed to descend, at this time, the first gate plate 7 and the second gate plate 8 are not subjected to the continuous force of the lower valve stem 5 to the two sides, the first gate plate 7 and the second gate plate 8 do not relatively move away, that is, do not fully expand, the first sealing surface 10 and the second sealing surface 11 are not easily abraded during the abutting of the first sealing surface 10 and the second sealing surface 11 and the first sealing end and the second sealing end, the sealing surfaces are protected, and after the first gate plate 7 and the second gate plate 8 are lowered in place, the lower valve stem 5 continues to apply force to the wedge-shaped groove 9, at this time, the force is applied to the two sides of the first gate plate 7 and the second gate plate 8, that is, the first sealing surface 10 and the second sealing surface 11 respectively apply extrusion force to the first sealing end and the second sealing end, so that the sealing surfaces fully abut and continuously apply extrusion force to achieve a vacuum-level sealing effect, and when opening the valve, the lower valve stem 5 rises along the wedge-shaped groove 9, the force of the lower valve stem 5 to the two sides of the first gate plate 7 and the second gate plate 8 disappears, and the extrusion force of the first sealing surface 10 and the second sealing surface 11 to the first sealing end and the second sealing end disappears, at this time, the rising frictional resistance of the first gate plate 7 and the second gate plate 8 can be effectively reduced, the valve opening is more smooth, the abrasion of the sealing surfaces is reduced, the service life of the sealing surfaces is prolonged, and problems such as leakage are prevented, the first sealing surface 10 is pressed during the closing of the valve, the compression sealing end 17 at the top of the first C-shaped block 16 abuts against the side wall of the first gate plate 7 and the second gate plate 8, so that the first C-shaped block 16 protects the first sealing surface 10 and the first sealing end in combination with the side wall of the valve body 1, without the need for additional power source, the closing, sealing and closing protection are integrated and automatically worked, and the vacuum-level sealing effect of the continuous extrusion of the double gate plate mechanism 6 is combined, when the first gate plate 7 and the second gate plate 8 are fully expanded by the lower valve stem 5, the first C-shaped block 16 is pushed again to make the compression sealing end 17 fully abut against and continuously extrude the side wall of the first gate plate 7 and the second gate plate 8, so that the first C-shaped block 16 can fully play a protection function, reduce the continuous effect of the pressure and corrosiveness of the fluid working medium on the sealing surfaces, and positively affect the stable and continuous work of the sealing surfaces, and the second sealing surface 11 and the second sealing end are protected by the second C-shaped block 22, and the first C-shaped block 16 and the second C-shaped block 22 and the first gate plate 7 and the second gate plate 8 do not interfere with each other, and can automatically and stably operate with the movement of the lower valve stem 5.

[0043] As a technical optimization scheme of the present application, the valve body 1 is fixedly installed with a valve cover 2 at the top end, and the valve cover 2 is fixedly provided with an actuator 3 at the top end, and the actuator 3 is a hand-automatic integrated screw lifting device. The actuator 3 is a driving device that converts control signals into linear or rotary motion by using electric energy, compressed air or pressure oil as power, and is mainly applied to the control of regulating mechanisms such as valves, dampers and baffles to realize production process automation. In the present application, the actuator 3 drives the upper valve rod 4 to lift by manual or electric mode, so as to realize the opening and closing of the valve.

[0044] As a technical optimization scheme of the present application, the upper valve rod 4 is provided with a thread on the outer wall, and the thread is screwed with the output end of the actuator 3. Thread lifting is a common mechanical mechanism, which is not only applied to various valves, but also commonly used in threaded jacks, threaded elevators and other equipment. Because the thread has a self-locking effect, the stable lifting of the upper valve rod 4 can be ensured.

[0045] As a technical optimization scheme of the present application, the inner hexagonal screw 12 is provided with a sealing gasket 13 on one side inside the second gate plate 8 and the extrusion surface of the second gate plate 8, and the second gate plate 8 on one side of the sealing gasket 13 is provided with a compression spring 14 sleeved on the outer circle of the inner hexagonal screw 12. The first gate plate 7 and the second gate plate 8 are connected by the inner hexagonal screw 12, and when the valve is closed, the first gate plate 7 and the second gate plate 8 are completely unfolded under force, and the compression spring 14 is compressed under force. When the valve is opened, the force of the lower valve rod 5 disappears, the compression spring 14 loses force and resets to pull the first gate plate 7 and the second gate plate 8 to reset relatively close.

[0046] As a technical optimization scheme of the present application, the first C-shaped block 16 is fixedly connected with a first spring 19 on one side, the first spring 19 is fixedly connected with a first fixed seat 18 at the top end on one side of the valve seat 101, and the end of the first spring 19 is fixedly connected in the embedded groove of the side wall of the first fixed seat 18. In the open state of the valve, the first C-shaped block 16 is not pressed, the first spring 19 pulls the first C-shaped block 16 to be stored on the inclined edge of the first fixed seat 18, which not only facilitates the storage of the first C-shaped block 16, but also prevents the fluid working substance from driving the first C-shaped block 16 to rotate meaninglessly.

[0047] As a technical optimization scheme of the present application, the first C-shaped block 16 and the first fixed seat 18 are both fixedly installed with a magnet 20 on the opposite surfaces, and the inclination angle of the side wall of the first fixed seat 18 is equivalent to the maximum rotation angle of the first C-shaped block 16. The magnet 20 cooperates with the first spring 19 to pull the first C-shaped block 16 to be stored on the inclined edge of the first fixed seat 18.

[0048] As a technical optimization scheme of the present application, the top of the valve seat 101 is provided with a first sealing end corresponding to the first sealing surface 10 on both sides, and the top of the inlet and outlet of the bottom of the valve body 1 is provided with a second sealing end corresponding to the second sealing surface 11 on both sides. The height of the first sealing surface 10 and the second sealing surface 11 is greater than that of the first sealing end and the second sealing end. The first sealing end and the second sealing end are relatively small in height, which facilitates the pressing and maintaining of the position of the first C-shaped block 16 and the second C-shaped block 22 by the bottom edges of the first sealing surface 10 and the second sealing surface 11. At the same time, the first sealing end and the second sealing end are combined with the first sealing surface 10 and the second sealing surface 11 to abut, thereby ensuring the sealing effect of the valve body 1.

[0049] As a technical optimization scheme of the present application, the second C-shaped block 22 is fixedly connected with a second spring on one side, and the second spring is fixedly connected with a second fixed seat in the middle of the valve body 1 on one side. The second fixed seat is symmetrical with the first fixed seat 18. The cooperation of the second C-shaped block 22 and the second fixed seat has the same function and effect as the cooperation of the first fixed seat 18 and the first C-shaped block 16.

[0050] As a technical optimization scheme of the present application, the bottom of the valve body 1 is slidably connected with an extrusion sliding block 24 on both sides of the top of the inlet and outlet, and the top and bottom of the opposite faces of the two extrusion sliding blocks 24 are provided with bevels. The two extrusion sliding blocks 24 are fixedly connected with a fixed block 25 on the opposite sides of the two ends, and the fixed block 25 is fixedly connected with a cylinder 26 slidably connected with the sliding groove 23 on the side close to the extrusion sliding block 24. The fixed block 25 is slidably connected with a guide rod 27 fixedly connected with the valve body 1 on one end. The extrusion sliding block 24 is driven to rotate by the second sealing surface 11 pressing the extrusion sliding block 24, so that the second C-shaped block 22 protects the second sealing surface 11, and the guide rod 27 facilitates the stable movement of the extrusion sliding block 24.

[0051] In use, the valve body 1 passes fluid working medium through the bottom inlet and outlet, when the valve is closed, the actuator 3 drives the upper valve rod 4 and the lower valve rod 5 to descend through the threaded lifting device, in the descending process of the lower valve rod 5, the wedge-shaped structure of the lower valve rod 5 first descends along the wedge-shaped groove 9 between the first gate plate 7 and the second gate plate 8, until each wedge-shaped structure descends to the bottom of each wedge-shaped groove 9, the lower valve rod 5 can drive the first gate plate 7 and the second gate plate 8 to descend along the valve body 1, in the descending process, the first gate plate 7 and the second gate plate 8 gradually close the inlet and outlet, when the first gate plate 7 and the second gate plate 8 descend to the bottom of the valve seat 101, the first sealing surface 10 and the second sealing surface 11 of the first gate plate 7 and the second gate plate 8 respectively abut against the first sealing end and the second sealing end, the inlet and outlet are completely closed, at this time, the actuator 3 continues to drive the upper valve rod 4, so that the lower valve rod 5 continues to apply force to the first gate plate 7 and the second gate plate 8, since the first gate plate 7 and the second gate plate 8 cannot continue to descend, the force of the lower valve rod 5 pushes the first gate plate 7 and the second gate plate 8 to the two sides through the wedge-shaped groove 9, so that the first gate plate 7 and the second gate plate 8 relatively move away, at the same time, the compression spring 14 is compressed under stress, the two first sealing surfaces 10 and the two second sealing surfaces 11 respectively extrude the two first sealing ends and the two second sealing ends, at this time, the first sealing surface 10 and the first sealing end and the second sealing surface 11 and the second sealing end fully abut and are continuously subjected to force to achieve the sealing effect of the vacuum level.

[0052] When the valve is opened, the actuator 3 drives the upper valve rod 4 and the lower valve rod 5 to ascend, in the ascending process of the lower valve rod 5, the wedge-shaped structure of the lower valve rod 5 first ascends along the wedge-shaped groove 9, until each wedge-shaped structure ascends to the top of each wedge-shaped groove 9, the first gate plate 7 and the second gate plate 8 are not subjected to the continuous force of the lower valve rod 5, the compression spring 14 loses force and resets, the first gate plate 7 and the second gate plate 8 relatively move close, the extrusion force of the first sealing surface 10 and the second sealing surface 11 on the first sealing end and the second sealing end disappears, greatly reducing the friction resistance, the lower valve rod 5 can pull the first gate plate 7 and the second gate plate 8 to ascend along the valve body 1, until the valve is completely opened.

[0053] Wherein in the process of closing the valve, as the first gate plate 7 and the second gate plate 8 descend, the bottom edge of the first sealing surface 10 first presses the bottom bevel of the first C-shaped block 16, and the bottom edge of the second sealing surface 11 presses the top bevel of the extrusion sliding block 24, so that the first C-shaped block 16 rotates around the support to overcome the pulling force of the first spring 19 and the attraction of the magnet 20, and the extrusion sliding block 24 is forced to slide along the valve body 1 to the direction of the guide rod 27, driving the fixed block 25 and the cylinder 26 to slide synchronously, so that the cylinder 26 drives the second C-shaped block 22 to rotate around the support to overcome the attraction of the magnet 20 on the second fixed seat and the second spring, and finally the bottom of the first C-shaped block 16 and the top end of the second C-shaped block 22 rotate to the position of abutting with the side wall of the first sealing surface 10 and the second sealing surface 11, and the top end of the first C-shaped block 16 and the bottom of the second C-shaped block 22 rotate to the position of abutting with the side wall of the first gate plate 7 and the second gate plate 8. As the first gate plate 7 and the second gate plate 8 descend to the position, the positions of the first C-shaped block 16 and the second C-shaped block 22 are also fixed, and in the subsequent process of the first gate plate 7 and the second gate plate 8 relatively moving away, the first sealing surface 10 and the second sealing surface 11 extruding the first sealing end and the second sealing end respectively, the first C-shaped block 16 and the second C-shaped block 22 are forced to rotate again, so that each compression sealing end 17 fully abuts with the side wall of the first gate plate 7 and the second gate plate 8, and continuously applies force to realize the full protection of the first C-shaped block 16 and the second C-shaped block 22 to the first sealing surface 10 and the second sealing surface 11.

[0054] Because the opening height of the first C-shaped block 16 and the second C-shaped block 22 is greater than the height of the first sealing surface 10 and the second sealing surface 11, the first C-shaped block 16 and the second C-shaped block 22 can directly cover the entire first sealing surface 10 and the second sealing surface 11 when rotating, without worrying about the limitation of the movement of the first C-shaped block 16 and the second C-shaped block 22. Because the top and bottom of the extrusion sliding block 24 are both provided with bevels, the first sealing surface 10 can smoothly push the extrusion sliding block 24 through the bottom bevel to realize the rising when opening the valve, that is, the first C-shaped block 16, the second C-shaped block 22 and the first sealing surface 10, the second sealing surface 11 will not interfere with each other, wherein when closing the valve, the first sealing surface 10 will first press the extrusion sliding block 24, so that the extrusion sliding block 24 moves, and as the first gate plate 7 descends, the first sealing surface 10 will be separated from the extrusion sliding block 24, and the extrusion sliding block 24 is automatically reset by the pulling force of the second spring. The action mode is consistent with the pressing of the extrusion sliding block 24 by the second sealing surface 11.

[0055] It is apparent that those skilled in the art can make various changes and modifications to the application without departing from the spirit and scope of the application. Thus, if these modifications and variations of the application fall within the scope of the claims and their equivalents, it is intended to include them in the scope of the application.

[0056] The above description is merely preferred embodiments of the application, but the protection scope of the application is not limited thereto, and any person skilled in the art can make equivalent replacements or changes to the technical solutions and the inventive concept of the application within the technical scope disclosed by the application, which should be covered within the protection scope of the application.

Claims

1. A super-large-bore vacuum-rated sealed gate valve comprising a valve body (1) and a lower valve stem (5), characterized in that: The valve body (1) bottom end fixedly connected with valve seat (101), valve body (1) top movably provided with upper valve stem (4), upper valve stem (4) bottom end fixedly connected with lower valve stem (5), lower valve stem (5) is plate-shaped, the cross section of lower valve stem (5) is the combination of wedge shape and profile, lower valve stem (5) both sides are provided with double gate plate mechanism (6) including first gate plate (7) and second gate plate (8), valve seat (101) top both sides are provided with first closing mechanism (15) including first C block (16), valve body (1) bottom inlet and outlet top end both sides are provided with second closing mechanism (21) including second C block (22); The lower valve stem (5) both sides are provided with first gate plate (7) and second gate plate (8) fixedly connected by internal hexagonal screw (12), the opposite surface of first gate plate (7) and second gate plate (8) is provided with wedge-shaped slot (9) suitable for lower valve stem (5) but larger in size, the bottom and top of first gate plate (7) and second gate plate (8) are provided with first sealing surface (10) and second sealing surface (11) respectively, the height of first sealing surface (10) and second sealing surface (11) is less than the opening height of first C block (16) and second C block (22); The top of valve seat (101) both sides is rotatably connected with first C block (16) through support, the length of first C block (16) is equivalent to the width of valve body (1) bottom inlet and outlet, the top length of first C block (16) is greater than the bottom length, the end of first C block (16) top is fixedly provided with compression sealing end (17); The top of valve body (1) bottom inlet and outlet is rotatably connected with second C block (22) through support, the length of second C block (22) is the same as first C block (16), the top length of second C block (22) is less than the bottom length, the end of second C block (22) bottom is fixedly provided with sealing structure same as compression sealing end (17), the both sides of second C block (22) top are symmetrically provided with sliding slot (23).

2. A super-large-bore vacuum-rated sealed gate valve according to claim 1, characterized in that: The top of valve body (1) is fixedly provided with valve cover (2), the top of valve cover (2) is fixedly provided with actuating mechanism (3), actuating mechanism (3) is hand-automatic integrated screw lifting equipment.

3. A large-bore vacuum-rated sealed gate valve according to claim 2, characterized in that: The outer wall of upper valve stem (4) is provided with screw thread, the screw thread is threadedly connected with the output end of actuating mechanism (3).

4. A large bore vacuum rated seal gate valve as claimed in claim 1, wherein: The inner hexagonal screw (12) is located in the inner side of second gate plate (8) and is provided with sealing gasket (13) on the extrusion surface of second gate plate (8), the inner side of second gate plate (8) of the side of sealing gasket (13) is provided with compression spring (14) sleeved on the outer ring of internal hexagonal screw (12).

5. A large bore vacuum rated seal gate valve as claimed in claim 1, wherein: The side of first C block (16) is fixedly connected with first spring (19), the top of valve seat (101) of the side of first spring (19) is fixedly connected with first fixed seat (18), the end of first spring (19) is fixedly connected in the embedded groove of the side wall of first fixed seat (18).

6. A super-large-bore vacuum-rated sealed gate valve as defined in claim 5, wherein: The first C-shaped block (16) and the first fixed seat (18) are fixedly installed with magnets (20) on opposite surfaces, and the inclination angle of the side wall of the first fixed seat (18) is equivalent to the maximum rotation angle of the first C-shaped block (16).

7. A large bore vacuum rated seal gate valve as claimed in claim 1, wherein: The valve seat (101) is provided with a first sealing end corresponding to the first sealing surface (10) on both sides of the top, and the valve body (1) is provided with a second sealing end corresponding to the second sealing surface (11) on both sides of the top of the bottom outlet, and the heights of the first sealing surface (10) and the second sealing surface (11) are greater than those of the first sealing end and the second sealing end.

8. A super-large-bore vacuum-rated sealed gate valve as defined in claim 5, wherein: The second C-shaped block (22) is fixedly connected with a second spring on one side, and the valve body (1) is fixedly connected with a second fixed seat in the middle on the side of the second spring, and the second fixed seat is symmetrical with the first fixed seat (18).

9. A super large bore vacuum rated seal gate valve as claimed in claim 1, wherein: The valve body (1) is slidably connected with extrusion sliding blocks (24) on both sides of the top of the bottom outlet, and the top and bottom of the opposite surfaces of the two extrusion sliding blocks (24) are provided with bevels, and the two ends of the opposite sides of the two extrusion sliding blocks (24) are fixedly connected with fixed blocks (25), and the fixed blocks (25) are fixedly connected with cylinders (26) slidably connected with the sliding grooves (23) on the side close to the extrusion sliding blocks (24), and the fixed blocks (25) are slidably connected with guide rods (27) fixedly connected with the valve body (1) on one end.

Images