Gate valve and vacuum equipment

Abstract

The utility model discloses a gate valve and vacuum equipment, the gate valve comprises a door plate for sealing a valve port, a rotating shaft arranged along the length direction of the door plate, a toggle mechanism connected between the rotating shaft and the door plate, and a rotating device for driving the rotating shaft to rotate, and the outer side of the door plate is provided with an overturning rod; one area of the overturning rod is hinged to the door plate, the other area is hinged to the outer wall of the upper side of the valve port, and the rotating shaft rotates to enable the toggle mechanism to deform so as to open or close the valve port. A gap is reserved between the overturning rod and the door plate, the door plate can rotate relative to the overturning rod, an elastic floating mechanism is arranged between the door plate and the overturning rod, and the angle of the door plate when the door plate is closed is adjusted in a self-adaptive mode through the elastic floating mechanism. According to the elastic floating mechanism, the door plate can be tightly attached to the sealing face of the outer wall of the valve port, the sealing performance of the gate valve is improved, meanwhile, the damping of adjustment of the door plate can be increased, the collision degree of the door plate and the outer wall of the valve port is reduced when the door is closed, buffering is increased, and instantaneous stress is reduced.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic coating equipment technology, and in particular to valves and vacuum equipment. Background Technology

[0002] In photovoltaic coating equipment, maintaining a high vacuum level in the process chamber is crucial for achieving the desired coating effect. With the continuous development of the photovoltaic industry and the urgent need to increase production capacity, the size of vacuum valves required for equipment is constantly increasing. Under this trend, improving the reliability of vacuum valves while reducing equipment costs has become a challenging problem for the industry.

[0003] Currently, existing valve sealing methods mainly include slide gate valves and flap valves. Slide gate valves, in particular, have complex structures, high manufacturing costs, are prone to malfunctions during operation, and are significantly limited by size, making them unsuitable for large-scale applications. Traditional flap valves also have many drawbacks; they require high strength from the valve hinge, and due to machining errors, the valve body is prone to loose fitting during closing, resulting in poor sealing. Considering economic efficiency, improving the machining precision of the sealing surface is currently very difficult, while large-size valves require larger diameter O-rings and stronger clamping forces. However, current flap valves typically apply relatively low clamping forces to their O-rings.

[0004] To address the issue of insufficient clamping force, existing technologies have developed solutions capable of applying greater clamping force. This solution uses a four-bar linkage to drive a sealing plate to seal the cavity opening. The push rods in the four-bar linkage are configured as selectable components of a kit. Different push rod models have varying distances from the hinge axis at the joint with the second rocker arm to the compression side. By replacing different push rod models in the kit, the sealing plate's fit can be adjusted, resulting in a tighter seal at the cavity opening. However, in practice, this solution requires frequent push rod replacements and reassemblies, making the process time-consuming, labor-intensive, and impractical, failing to meet actual usage requirements.

[0005] In addition, existing valves generally use a method where the valve plate makes direct, rigid contact with the valve port. This contact method generates significant stress at the moment the valve plate closes, which can easily cause damage and deformation to the valve, thereby severely affecting its sealing performance and reducing the stability and reliability of the equipment.

[0006] In summary, existing vacuum valves have shortcomings in terms of sealing performance and ease of operation. There is an urgent need to design an innovative valve to overcome these problems in order to meet the ever-evolving needs of photovoltaic coating equipment. Utility Model Content

[0007] To address at least one deficiency in existing technologies, this invention proposes a valve and vacuum equipment, which effectively improves the sealing performance and reliability of the valve, reduces equipment costs, and provides strong support for the development of photovoltaic coating equipment.

[0008] The technical solution adopted in this utility model is to design a valve, including: a door panel for sealing the valve port, a rotating shaft arranged along the length of the door panel, an elbow mechanism connected between the rotating shaft and the door panel, and a rotating device for driving the rotating shaft to rotate. A flipping rod is provided on the outer side of the door panel. One area of ​​the flipping rod is hinged to the door panel, and another area is hinged to the upper outer wall of the valve port. Rotation of the rotating shaft causes the elbow mechanism to deform, thereby opening or closing the valve port. A gap is left between the flipping rod and the door panel, allowing the door panel to rotate relative to the flipping rod. An elastic floating mechanism is provided between the door panel and the flipping rod, adaptively adjusting the angle of the door panel when closed.

[0009] Furthermore, the elastic floating mechanism includes: an elastic element supported between the door panel and the flip rod, the flip rod being hinged to the door panel via a hinge shaft, and the elastic element being provided on both the upper and lower sides of the hinge shaft.

[0010] Furthermore, the flipping rod is provided with a positioning hole facing the door panel, and the elastic element is a cylindrical spring, which is disposed in the positioning hole.

[0011] Furthermore, the toggle mechanism includes: a first link and a second link, the first end of the first link is fixed on the rotating shaft, the second end of the first link is rotatably connected to the first end of the second link through a first shaft hinge, and the second end of the second link is rotatably connected to the door panel and / or the flip rod through a second shaft hinge.

[0012] Furthermore, the second end of the first connecting rod is inclined toward the valve port, and the first connecting rod and the second connecting rod are folded or unfolded in the area between the upper outer wall of the valve port and the rotating shaft.

[0013] Furthermore, the rotating shaft is supported on multiple fixed seats, the positions of which are fixed relative to the valve port, and each toggle mechanism is equipped with a corresponding fixed seat.

[0014] Furthermore, the fixed base is provided with a limiting part located above the rotating shaft, and the first end of the first connecting rod is provided with a locking part corresponding to the limiting part.

[0015] Furthermore, the rotating shaft is provided with a rotating device at both ends, and the rotating device synchronously drives the rotating shaft to rotate.

[0016] Furthermore, the rotating device includes a telescopic cylinder and a crank fixedly connected to the rotating shaft, and the crank and the telescopic part of the telescopic cylinder are rotatably connected by a fourth axis hinge.

[0017] This invention also proposes a vacuum device, including the aforementioned valve.

[0018] Compared with the prior art, the present invention has at least one of the following beneficial effects:

[0019] 1. An elastic floating mechanism is designed between the door panel and the flip rod. This elastic floating mechanism adaptively adjusts the angle of the door panel when it is closed, so that the sealing surface of the door panel and the outer wall of the valve port are tightly fitted, improving the sealing performance of the valve. At the same time, it can increase the damping of the door panel adjustment, reduce the degree of collision between the door panel and the outer wall of the valve port when closing, increase buffering, and reduce instantaneous stress.

[0020] 2. The toggle mechanism is designed in the area between the upper outer wall of the valve port and the rotating shaft. The first connecting rod is inclined towards the valve. When the door is opened, the toggle mechanism rotates and folds inward, resulting in a shorter movement path for the door and less space occupation.

[0021] 3. The rotating shaft is supported on multiple fixed seats, and each toggle mechanism is equipped with a corresponding fixed seat, which effectively disperses the stress on the rotating shaft, reduces the deformation of the rotating shaft, and extends the service life of the valve.

[0022] 4. Rotating devices are provided at both ends of the rotating shaft. The two rotating devices provide the power for the door panel to flip, which effectively reduces the torsional deformation of the rotating shaft and increases the torque on the rotating shaft to provide greater clamping force, making the sealing surface of the door panel and the outer wall of the valve port fit more tightly and reducing the leakage rate of the valve seal. Attached Figure Description

[0023] The present invention will now be described in detail with reference to embodiments and accompanying drawings. To illustrate the details and facilitate understanding of its principles, the drawings are not necessarily to scale, and similar reference numerals may describe similar components in different views. The accompanying drawings generally illustrate the embodiments discussed herein by way of example and not limitation.

[0024] in:

[0025] Figure 1 This is a three-dimensional schematic diagram of the valve of this utility model when it is closed.

[0026] Figure 2 This is a front view schematic diagram of the valve of this utility model when it is closed.

[0027] Figure 3 This is a side view of the valve of this utility model when it is closed.

[0028] Figure 4This is a partially enlarged schematic diagram of the elbow mechanism when the valve of this utility model is closed.

[0029] Figure 5 This is a cross-sectional schematic diagram of the elbow mechanism of this utility model.

[0030] Figure 6 yes Figure 5 Enlarged view of point A in the middle;

[0031] Figure 7 This is a three-dimensional schematic diagram of the valve of this utility model when it is open.

[0032] Figure 8 This is a side view of the valve of this utility model when it is open.

[0033] Figure descriptions: 1. Valve port; 2. Door panel; 3. Rotating shaft; 4. Fixed seat; 41. Limiting part; 5. First connecting rod; 51. Locking part; 6. Second connecting rod; 7. Telescopic cylinder; 71. Piston rod; 8. Tilting rod; 81. Positioning hole; 82. Guide post; 9. Cylindrical spring; 10. Base; 11. First axis hinge; 12. Second axis hinge; 13. Third axis hinge; 14. Fourth axis hinge; 15. Fifth axis hinge; 16. O-ring seal; 17. Fixing block; 18. Crank. Detailed Implementation

[0034] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0035] The valve proposed in this utility model is applicable to equipment with high sealing requirements, including but not limited to vacuum equipment.

[0036] like Figures 1 to 3 As shown, specifically, the valve includes: a door plate 2, a rotating shaft 3, an toggle mechanism, and a rotating device. The door plate 2 is used to seal the valve port 1. A sealing element is provided on the opposite side of the door plate 2 and / or the valve port 1. Taking the door plate 2 as an example, the sealing element is provided on the side of the door plate 2 facing the valve port 1. When the door plate 2 is closed, it is pressed tightly against the outer wall of the valve port 1, and the sealing element is squeezed and clamped between the door plate 2 and the outer wall of the valve port 1, achieving a sealing effect. The rotating shaft 3 is arranged along the length of the door plate 2 and is rotatably mounted on a fixed seat 4. The position of the fixed seat 4 is fixed relative to the valve port 1. The fixed seat 4 cooperates with the rotating shaft 3 through a flanged self-lubricating bearing to support the rotating shaft 3 to rotate around a fixed axis. The toggle mechanism connects the rotating shaft 3 and the door plate 2.

[0037] like Figure 3 , 4As shown, a flip rod 8 is provided on the outer side of the door panel 2. The inner side of the door panel 2 refers to the side facing the valve port 1 when the door panel 2 is closed, and the outer side of the door panel 2 refers to the side away from the valve port 1 when the door panel 2 is closed. One area of ​​the flip rod 8 is hinged to the door panel 2, and the other area is hinged to the upper outer wall of the valve port 1. The rotating shaft 3 is controlled to rotate by a rotating device. When the rotating shaft 3 rotates, the toggle mechanism deforms, forcing the door panel 2 to rotate relative to the valve port 1 along with the flip rod 8, thereby opening or closing the valve port 1.

[0038] like Figure 5 As shown, a certain gap is left between the flip rod 8 and the door panel 2. The door panel 2 can rotate relative to the flip rod 8 around the hinge axis between the flip rod 8 and the door panel 2, so that the door panel 2 can fit tightly against the outer wall of the valve port 1. An elastic floating mechanism is provided between the door panel 2 and the flip rod 8, which adaptively adjusts the angle of the door panel 2 when closed. This design can adaptively compensate for the sealing error caused by the angular deviation of the door panel 2, improve the sealing performance of the valve, and increase the damping of the adjustment of the door panel 2, reducing the degree of collision between the door panel 2 and the outer wall of the valve port 1 when closing, increasing buffering and reducing instantaneous stress.

[0039] In some embodiments of this utility model, the elastic floating mechanism includes: an elastic element supported between the door panel 2 and the flip rod 8. The flip rod 8 is hinged to the door panel 2 via a hinge shaft. Using the hinge shaft as a dividing line, elastic elements are provided on both the upper and lower sides of the hinge shaft, meaning at least one elastic element is located above the hinge shaft, and at least one elastic element is located below the hinge shaft. To simplify the structure, the hinge shaft in this embodiment is the hinge shaft of the second-axis hinge 12. That is, the second-axis hinge 12 simultaneously rotatably connects the door panel 2, the flip rod 8, and the second connecting rod 6 mentioned below.

[0040] like Figure 6 As shown, in some embodiments, the elastic element is a cylindrical spring 9. The flip rod 8 is provided with a positioning hole 81 facing the door panel 2. The cylindrical spring 9 is disposed in the positioning hole 81. A guide post 82 is also provided in the positioning hole 81. The cylindrical spring 9 is slidably sleeved on the guide post 82. The positioning hole 81 and the guide post 82 play a positioning and guiding role for the extension and retraction of the cylindrical spring 9, so that the cylindrical spring 9 can make stable elastic extension and retraction in the axial direction of the positioning hole 81, and maintain stable elastic support for the door panel 2.

[0041] Of course, in practical applications, elastic rubber blocks can also be installed on the door panel 2 and the flip rod 8. The elastic rubber blocks can be fixed to the door panel 2 or the flip rod 8 by bolts or slots. When the door panel 2 is closed, if uneven force occurs, the elastic rubber blocks will deform elastically. Due to the elastic properties of rubber, this will push the door panel 2 to adjust its angle, so as to achieve uniform contact between the door panel 2 and the outer wall of the valve port 1. At the same time, the elasticity of the rubber blocks can buffer the impact force when the door panel 2 is closed, avoiding rigid collisions and protecting the equipment.

[0042] This article only lists two commonly used elastic floating mechanisms. The specific structure of the elastic floating mechanism can be designed according to the usage requirements, as long as it has the function of elastic extension and retraction.

[0043] Figure 1 and Figure 2 This shows the state of the valve when it is closed. Figure 7 and Figure 8 The diagram illustrates the state of the valve when it is open. If the door panel 2 and the flip rod 8 are rigidly connected without an elastic floating mechanism, and the upper end of the flip rod 8 is hinged to the outer wall of the valve port 1 via a third-axis hinge 13 located above the valve port 1, when the door panel 2 is closed, it needs to rotate downwards towards the valve port 1 around the third-axis hinge 13. Because the door panel 2 is a rectangular plate, its various parts do not simultaneously contact the valve port 1 during rotation. In reality, the upper part of the door panel 2 first touches the upper outer wall of the valve port 1. As the door panel 2 gradually approaches the valve port 1 during rotation, the forces on each part are asymmetrically distributed. Generally, the upper part of the door panel 2 experiences greater force, while the lower part experiences less force. This uneven force distribution leads to differences in the sealing performance of each part; the parts with greater force have relatively better sealing performance, while the parts with less force have poorer sealing performance, ultimately resulting in an overall incomplete seal. In addition, at the moment of closing, the door panel 2 will rigidly collide with the outer wall of the valve port 1. This rigid collision will cause a large impact on the equipment, accelerate the damage to the door panel 2, the outer wall of the valve port 1 and related connecting parts, thereby reducing the service life and stability of the equipment and affecting its normal operation.

[0044] Because the door panel 2 and the flip rod 8 of this invention are connected by an elastic floating mechanism, when the door panel 2 is closed, its upper part contacts the valve port 1 first. The resulting top pressure causes the elastic element located above the second axis hinge 12 to compress and deform. Based on this, the door panel 2 will rotate around the second axis hinge 12 at a certain angle. This rotation can effectively reduce the top pressure borne by the door panel 2. At the same time, the tilt angle of the door panel 2 relative to the valve port 1 decreases, thereby enabling the surface of the door panel 2 to press against the outer wall of the valve port 1 in a face-to-face manner, significantly improving the fit between the door panel 2 and the outer wall of the valve port 1 at various positions. Typically, an O-ring seal 16 corresponding to the outer wall of the valve port 1 is provided on the door panel 2. Under the action of the elastic floating mechanism, all parts of the O-ring seal 16 can be tightly pressed together, providing a strong guarantee for achieving good sealing performance. In addition, the elastic force generated by the elastic element forms an elastic buffer area between the door panel 2 and the outer wall of the valve port 1, which effectively avoids rigid collision between the door panel 2 and the outer wall of the valve port 1 at the moment of closing, greatly reduces instantaneous stress, and plays a good protective role for the equipment.

[0045] The toggle mechanism is a linkage mechanism used to achieve motion control or locking functions. Its basic principle is that by controlling the movement of one of the linkages, the geometric deformation of the toggle mechanism can be controlled, thereby locking and fixing the door panel 2, making it difficult to open or move the door panel 2. This facilitates the easy movement of the door panel 2 or provides a stable clamping force, thereby reducing air leakage in the valve seal.

[0046] like Figure 4 As shown, in some embodiments of this utility model, the toggle mechanism includes: a first connecting rod 5 and a second connecting rod 6. The first end of the first connecting rod 5 is fixedly connected to the rotating shaft 3. A connecting key is provided between the first connecting rod 5 and the rotating shaft 3. The rotating shaft 3 transmits torque to the first connecting rod 5 through the connecting key to make it move. The second end of the first connecting rod 5 is rotatably connected to the first end of the second connecting rod 6 through a first shaft hinge 11. The second end of the second connecting rod 6 is rotatably connected to the middle part of the door panel 2 through a second shaft hinge 12. The middle part of the flip rod 8 is rotatably connected to the middle part of the door panel 2 through a second shaft hinge 12. The upper end of the flip rod 8 is rotatably connected to the fixing block 17 through a third shaft hinge 13. The third shaft hinge 13 of the flip rod 8 is equivalent to a door hinge. The fixing block 17 is fixedly set on the upper outer wall of the valve port 1. The third shaft hinge 13 is installed on the fixing block 17.

[0047] like Figure 3 , 8As shown, in a preferred embodiment of this utility model, the second end of the first connecting rod 5 is inclined towards the valve port 1, and the first connecting rod 5 and the second connecting rod 6 are folded or unfolded in the area between the rotating shaft 3 and the valve port 1. Specifically, when the door panel 2 is opened, the second end of the first connecting rod 5 moves upward toward the valve port 1, and when the door panel 2 is closed, the second end of the first connecting rod 5 moves downward toward the valve port 1. During the opening and closing of the door panel 2, the rotation range of the first connecting rod 5 is within the area between the upper outer wall of the valve port 1 and the rotating shaft 3. If the side of the rotating shaft 3 closer to the valve port 1 is considered the inner side and the side of the rotating shaft 3 farther from the valve port 1 is considered the outer side, then the toggle mechanism uses an inward rotating and folding rotation method to open the valve. In this way, the door panel movement path is shorter and occupies less space, which is particularly suitable for application scenarios where the valve is installed inside a cavity.

[0048] like Figure 1 , 2 As shown, the rotating shaft 3 is supported on multiple fixed seats 4, which are arranged along the axial direction of the rotating shaft 3. The toggle mechanism includes several units arranged along the length of the rotating shaft 3, each with a corresponding fixed seat 4, effectively dispersing stress on the rotating shaft 3, reducing deformation of the rotating shaft 3, and extending the service life of the valve. In some embodiments of this invention, five toggle mechanisms are provided, allowing for a suitable number of toggle mechanisms to be matched according to the actual length of the rotating shaft 3, thereby ensuring uniform stress distribution on the rotating shaft 3 and the door panel 2, and improving sealing performance.

[0049] like Figure 4 As shown, the fixed base 4 is provided with a limiting part 41 located on the rotation path of the first connecting rod 5. The end of the first connecting rod 5 is provided with a locking part 51 corresponding to the limiting part 41. The limiting part 41 prevents the first connecting rod 5 from rotating too much during the closing process of the door panel 2. The flipping rod 8 and the second connecting rod 6 will also bear greater force. In particular, the upper end of the flipping rod 8 near the third axis hinge 13 is at risk of breaking due to excessive tension, which may damage the door valve.

[0050] like Figure 1 , 2 As shown, in the preferred embodiment of this utility model, both ends of the rotating shaft 3 are provided with rotating devices. During the operation of the valve switch, the two rotating devices simultaneously provide the power for the door panel 2 to flip, effectively reducing the torsional deformation of the rotating shaft 3, and increasing the torque on the rotating shaft 3 to provide greater clamping force, so that the sealing surfaces of the door panel 2 and the outer wall of the valve port 1 fit more tightly, reducing the leakage rate of the valve seal.

[0051] Specifically, the rotating device includes a telescopic cylinder 7 and a crank 18. The end of the rotating shaft 3 passes through a bearing seat and is fixedly connected to the crank 18. The crank 18 and the telescopic part of the telescopic cylinder 7 are rotatably connected via a fourth-axis hinge 14. The telescopic cylinder 7 is a pneumatic cylinder, and the telescopic part is the piston rod 71 of the pneumatic cylinder. In practical applications, the relative position of the rotating shaft 3 and the crank 18 can be adjusted according to usage requirements, thereby adjusting the opening and closing stroke of the valve. The size of the door panel 2 can also be adjusted according to sealing requirements. This structure has strong adaptability.

[0052] In addition, if the valve needs to be used in a vacuum chamber, ordinary bearing housings may have insufficient sealing performance, lubrication problems, and potential gas release under high vacuum. These issues will affect the vacuum level of the vacuum chamber and the performance of the valve. Therefore, the bearing housing needs to be replaced with a magnetic fluid sealing device, and a coupling can be used to connect the magnetic fluid shaft to the rotating shaft in the vacuum chamber.

[0053] like Figure 1 , 2 As shown, in some embodiments of this utility model, the rotating shaft 3 is located above the door panel 2, and the telescopic cylinder 7 is located below the rotating shaft 3. The cylinder body of the telescopic cylinder 7 is rotatably connected to the base 10 via a fifth-axis hinge 15, and the position of the base 10 is fixed relative to the valve port 1. The two telescopic cylinders 7 are respectively disposed at both ends of the rotating shaft 3, that is, a crank 18 is fixedly connected to both ends of the rotating shaft 3, and each crank 18 is rotatably connected to the piston rod 71 of its corresponding telescopic cylinder 7.

[0054] like Figures 1 to 3 As shown, when the door panel 2 needs to be closed, the piston rod 71 of the telescopic cylinder 7 extends upward to push the crank 18 to rotate upward. The crank 18 then causes the rotating shaft 3 to rotate around its own axis. The rotating shaft 3 then drives the first connecting rod 5 of the toggle mechanism to rotate, causing the first connecting rod 5 to rotate downward. The first connecting rod 5 then drives the second connecting rod 6 to move downward. The second connecting rod 6 then pushes the door panel 2 to rotate around the third axis hinge 13 toward the valve port 1, so that the door panel 2 covers the valve port 1. Under the action of the crank 18, the first connecting rod 5 and the second connecting rod 6, the door panel 2 is subjected to a large upward pressure, thus improving the sealing performance.

[0055] like Figure 7 , 8As shown, when the door panel 2 needs to be opened, the piston rod 71 of the telescopic cylinder 7 retracts downward, causing the crank 18 to rotate downward. This, in turn, causes the first connecting rod 5 to rotate upward via the pivot 3. The first connecting rod 5 then pulls the second connecting rod 6 upward, causing the door panel 2 to rotate around the third axis hinge 13 and move away from the valve port 1. As the first connecting rod 5 pulls the second connecting rod 6 upward, the angle between the first connecting rod 5 and the second connecting rod 6 gradually decreases. After the door panel 2 is fully opened, the angle between the second connecting rod 6 and the first connecting rod 5 reaches its minimum. At this point, the door panel 2, the second connecting rod 6, and the first connecting rod 5 essentially form an N-shaped fold. Thus, when the door panel 2 is opened, the space occupied by the door panel 2 and the toggle mechanism is relatively small, and this design can save space.

[0056] This invention utilizes the telescopic cylinder 7 for extension and retraction, combined with an toggle mechanism to control the opening and closing of the door panel 2. The structure is simple and easy to control. Under the action of the crank 18, the first connecting rod 5, and the second connecting rod 6, the door panel 2 is subjected to greater top pressure, improving sealing performance. When the door panel 2 is opened, the door panel 2, the second connecting rod 6, and the first connecting rod 5 form an N-shaped fold, thereby reducing the space occupied. During the process from closing to opening the door panel 2, the rotation angle of the door panel 2 is greater than the rotation angle of the crank 18, meaning that the crank 18 can drive the door panel 2 to rotate significantly with a smaller rotation angle, resulting in higher efficiency in door valve operation.

[0057] The valve mentioned above is particularly suitable for vacuum equipment, such as for sealing the valve port 1 of the process chamber of a photovoltaic coating equipment. Of course, it can also be used in other similar equipment, and this utility model does not impose any special limitations on it.

[0058] It should be noted that the terminology used above is for describing specific embodiments only and is not intended to limit the exemplary embodiments according to this utility model. When the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof. The order of execution of actions, steps, etc., in the apparatus and methods shown in the specification and drawings can be implemented in any order unless a specific express order is specified, and as long as the output of the preceding process is not used in the subsequent process. Similar sequential terms used for ease of description do not imply that such an order must be followed.

[0059] Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0060] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A gate valve comprising: The utility model discloses a door plate (2) for sealing valve port (1), the rotation axis (3) of setting along the length direction of the door plate, the toggle mechanism of connecting between the rotation axis (3) and the door plate (2), and the rotation device of driving the rotation of the rotation axis (3), the outside of the door plate (2) is equipped with the turnover lever (8), one area of the turnover lever (8) is hinged and is connected the door plate (2), the other area is hinged and is connected the upper side outer wall of the valve port (1), the rotation of the rotation axis (3) makes the toggle mechanism deform to open or close the valve port (1); Its characterized in that, the gap between the turnover lever (8) and the door plate (2) can rotate relative to the turnover lever (8), the elastic floating mechanism is equipped between the door plate (2) and the turnover lever (8), and the angle of the door plate (2) is adjusted by the elastic floating mechanism when closing.

2. The gate valve of claim 1, wherein, The elastic floating mechanism includes: elastic members supported between the door plate (2) and the turnover lever (8), the turnover lever (8) is hinged and connected to the door plate (2) through a hinge shaft, and the upper side and the lower side of the hinge shaft are both provided with the elastic members.

3. The gate valve of claim 2, wherein, The turnover lever (8) is provided with a positioning hole (81) facing the door plate (2), and the elastic members are cylindrical springs (9) arranged in the positioning hole (81).

4. Gate valve according to any of claims 1 to 3, characterized in that The toggle mechanism includes: a first connecting rod (5) and a second connecting rod (6), the first end of the first connecting rod (5) is fixed on the rotation axis (3), the second end of the first connecting rod (5) is rotatably connected to the first end of the second connecting rod (6) through a first shaft hinge (11), and the second end of the second connecting rod (6) is rotatably connected to the door plate (2) and / or the turnover lever (8) through a second shaft hinge (12).

5. The gate valve of claim 4, wherein, The rotation axis is supported on a plurality of fixed seats (4), the positions of the fixed seats (4) are fixed relative to the valve port (1), and each toggle mechanism is provided with a corresponding fixed seat (4).

6. The gate valve of claim 5, wherein, The fixed seat (4) is provided with a limiting portion (41) above the rotation axis (3), and the first end of the first connecting rod (5) is provided with a clamping portion (51) corresponding to the limiting portion (41).

7. The gate valve of claim 4, wherein, The second end of the first connecting rod (5) is inclined to the direction close to the valve port (1), and the first connecting rod (5) and the second connecting rod (6) are folded or unfolded in the area between the upper side outer wall of the valve port (1) and the rotation axis (3).

8. A gate valve according to any one of claims 1 to 3, characterised in that Both ends of the rotation axis are provided with the rotation device, and the rotation device synchronously drives the rotation of the rotation axis.

9. The gate valve of claim 8, wherein, The rotation device includes a telescopic cylinder (7) and a crank (18) fixedly connected with the rotation axis (3), and the crank (18) is rotatably connected with the telescopic part of the telescopic cylinder (7) through a fourth shaft hinge (14).

10. Vacuum apparatus characterized in that The door valve comprises the door valve of any one of claims 1-9.

Images