Sealing valve

Abstract

The utility model provides a sealing valve. The sealing valve comprises a valve plate; the door main body is connected with a connecting piece; the braking mechanism comprises a first elastic piece, a limiting assembly and a stopping piece, the stopping piece is arranged on the door body, and the first elastic piece and the valve plate are both connected with the limiting assembly; when the connecting piece is connected with the limiting assembly, the limiting assembly is attached to the first elastic piece so that the first elastic piece can be in a compressed state, and the connecting piece drives the limiting assembly, the valve plate and the first elastic piece to move together relative to the door body. When the connecting piece is separated from the limiting assembly, the first elastic piece is switched to the stretching state under the action of the tension of the first elastic piece and drives the limiting assembly to move till the limiting assembly is clamped to the stopping piece. Therefore, when the conditions that the connecting piece is broken, the connecting piece is separated from the valve plate and the like occur, the limiting assembly can be clamped to the stopping piece, so that the conditions that the valve plate is braked, the valve plate is prevented from falling and the like are achieved, and the safety and the reliability of the sealing valve are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum sealing, and particularly to a sealing valve. Background Art

[0002] In recent years, with the continuous progress of technology, more and more scenarios require the environment to be maintained in a vacuum state. For example, maglev trains in vacuum pipelines, aerospace, and national defense also involve more and more production and tests in vacuum environments.

[0003] To ensure the vacuum state of the environment, a sealing device is usually provided to isolate the internal environment from the external environment. Taking the maglev train transportation system in a vacuum pipeline as an example, multiple vacuum pipelines are usually provided, and sealing valves are provided at the ends of the vacuum pipelines. When operating, the opening and closing of the sealing valves are involved to achieve the passage of the maglev train in the vacuum pipeline or the isolation and maintenance of a specific vacuum pipeline. However, when the sealing valve is working, situations such as the valve plate falling out of control may occur, affecting the safety of the maglev train transportation system in the vacuum pipeline. Summary of the Utility Model

[0004] To at least partially solve the problems existing in the prior art, according to one aspect of the present utility model, a sealing valve is provided. The sealing valve includes: a valve plate; a door body, the door body is connected with a connecting piece; and a braking mechanism, the braking mechanism includes a first elastic member, a limiting component, and a stop member, wherein the stop member is arranged on the door body, and both the first elastic member and the valve plate are connected with the limiting component; when the connecting piece is connected with the limiting component, the limiting component is in contact with the first elastic member to make the first elastic member in a compressed state, and the connecting piece drives the limiting component, the valve plate, and the first elastic member to move relative to the door body together; when the connecting piece is separated from the limiting component, the first elastic member switches to an extended state under the action of its own tension and drives the limiting component to move until the limiting component is stuck to the stop member.

[0005] For the sealing valve provided in the present application, through the setting of the braking mechanism, when situations such as the fracture of the connecting piece or the disconnection of the connecting piece from the valve plate occur, the limiting component can be stuck to the stop member to realize the braking of the valve plate, prevent the valve plate from falling and other situations, and improve the safety and reliability of the sealing valve. When applied to the maglev train transportation system in a vacuum pipeline, the safety of the system operation can be better ensured.

[0006] Exemplarily, the limiting component includes a pressing member and a limiting member movably connected to the pressing member. When the connecting piece is connected with the pressing member, the pressing member is in contact with the first elastic member to make the first elastic member in a compressed state; when the connecting piece is separated from the pressing member, the first elastic member switches to an extended state under the action of its own tension and pushes the pressing member, and the pressing member drives the limiting member to rotate until the limiting member is stuck to the stop member.

[0007] Exemplarily, the limiting member includes a first limiting arm and a second limiting arm that are movably connected to the pressing member and are respectively located on opposite sides of the pressing member. The first limiting arm has a first connecting portion connected to the valve plate, and the second limiting arm has a second connecting portion connected to the valve plate.

[0008] When the first elastic member switches from the compressed state to the extended state, the first limiting arm rotates around the first connecting portion under the drive of the pressing member, and the end of the first limiting arm away from the second limiting arm moves in a direction away from the second limiting arm; and / or

[0009] The second limiting arm rotates around the second connecting portion under the drive of the pressing member, and the end of the second limiting arm away from the first limiting arm moves in a direction away from the first limiting arm.

[0010] Exemplarily, the valve plate moves relative to the door body in the vertical direction under the drive of the connecting member.

[0011] Exemplarily, the stopper includes a plurality of teeth arranged in the vertical direction.

[0012] Exemplarily, a through hole is provided on the door body. The valve plate moves relative to the door body between the open position and the closed position. When the valve plate is in the closed position, it blocks the through hole and exposes the through hole when in the open position.

[0013] Exemplarily, a sealing structure is provided on the outer periphery of the through hole. The sealing structure has a first state and a second state. In the second state, the sealing structure fits with the valve plate, and in the first state, the sealing structure is spaced apart from the valve plate.

[0014] Exemplarily, the sealing structure includes a flexible member, and the switching of the sealing structure from the first state to the second state is achieved by injecting fluid into the interior of the flexible member.

[0015] Exemplarily, a mounting groove is provided on the part of the door body corresponding to the outer periphery of the through hole, and at least part of the structure of the flexible member is located in the mounting groove.

[0016] Exemplarily, a pressing block is further provided in the mounting groove. The sealing structure further includes a mounting rib connected to the flexible member. The mounting rib is clamped between the pressing block and the bottom of the mounting groove, and a fastening member passes through the pressing block and the mounting rib and is connected to the door body.

[0017] Exemplarily, the sealing structure further includes a flow channel communicating with the interior of the flexible member, and the fluid is injected into or discharged from the interior of the flexible member through the flow channel.

[0018] Exemplarily, a balancing assembly is further provided on the door body. When the valve plate is in the closed position, the balancing assembly is inserted between the valve plate and the door body to limit the valve plate; when the valve plate leaves the closed position, the balancing assembly is spaced apart from the through hole.

[0019] Exemplarily, the balance component includes a second elastic member and a rotating member. The rotating member includes a first rotating end connected to the second elastic member and a second rotating end opposite to the first rotating end.

[0020] When the valve plate is in the closed position, the valve plate presses the first rotating end so that the second rotating end is inserted between the valve plate and the door body; when the valve plate is in the open position, the second elastic member extends under its own tension so that the second rotating end is spaced apart from the through port.

[0021] Exemplarily, a first rib and a second rib are provided on one side of the rotating member facing the valve plate. When the valve plate is in the closed position, the first rib and the second rib are respectively located on opposite sides of the valve plate.

[0022] Exemplarily, the valve plate has an arc-shaped structure.

[0023] Exemplarily, one side of the valve plate is concave and the other side is correspondingly convex, and a reinforcing rib is provided on the concave side of the valve plate.

[0024] A series of simplified concepts are introduced in the utility model content, which will be further described in detail in the specific implementation part. The utility model content part is not intended to attempt to define the key features and essential technical features of the claimed technical solution, nor is it intended to determine the protection scope of the claimed technical solution.

[0025] The following will describe in detail the advantages and features of the present utility model with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The following drawings of the present utility model are hereby incorporated as part of the present utility model for understanding the present utility model. The embodiments and descriptions thereof of the present utility model are shown in the drawings to explain the principles of the present utility model. In the drawings,

[0027] Figure 1 is a perspective view of a sealing valve according to an exemplary embodiment of the present utility model;

[0028] Figure 2 is Figure 1 a partial enlarged view of part A in

[0029] Figure 3 is Figure 1 a partial enlarged view of part B in

[0030] Figure 4 is a front view of a sealing valve according to an exemplary embodiment of the present utility model;

[0031] Figure 5 is Figure 4 a partial enlarged view of part C in

[0032] Figure 6 Side view of a sealing valve according to an exemplary embodiment of the present utility model;

[0033] Figure 7 is Figure 6 Partial enlarged view of part D in

[0034] Figure 8 is Figure 7 Partial enlarged view of part E in

[0035] Figure 9 Stereogram of a partial structure of a sealing valve according to an exemplary embodiment of the present utility model; and

[0036] Figure 10 is Figure 9 Partial enlarged view of part F in

[0037] Wherein, the above-mentioned drawings include the following reference numerals:

[0038] 10, sealing valve; 110, valve plate; 1110, reinforcing rib; 120, door body; 1210, installation groove; 1220, pressing block; 130, connecting piece; 140, braking mechanism; 1410, first elastic member; 1420, limiting component; 1421, pressing member; 1422, limiting member; 1423, first limiting arm; 1424, second limiting arm; 1425, first connecting portion; 1426, second connecting portion; 1430, stopping member; 150, sealing structure; 1510, flexible member; 1520, installation rib; 1530, fastener; 1540, flow passage; 160, balancing component; 1610, second elastic member; 1620, rotating member; 1621, first rotating end; 1622, second rotating end; 1623, first rib; 1624, second rib. Detailed implementation manners

[0039] In the following description, a large number of details are provided in order to thoroughly understand the present utility model. However, those skilled in the art can understand that the following description only exemplarily shows the preferred embodiments of the present utility model, and the present utility model can be implemented without one or more such details. In addition, in order to avoid confusing the present utility model, some technical features well known in the art are not described in detail.

[0040] In order to thoroughly understand the implementation manners of the present utility model, detailed structures will be proposed in the following description. Obviously, the implementation of the implementation manners of the present utility model is not limited to the special details familiar to those skilled in the art. The preferred implementation manners of the present utility model are described in detail as follows. However, in addition to these detailed descriptions, the present utility model can also have other implementation manners.

[0041] In an embodiment of the present utility model, a sealing valve is provided. The sealing valve can be applied to any scenario requiring a vacuum environment, including but not limited to the vacuum pipeline maglev train transportation system, ground simulation equipment in aerospace and national defense.

[0042] With reference to Figure 1 , Figure 2 and Figure 4 , the sealing valve 10 may include a valve plate 110, a door body 120, and a braking mechanism 140. The door body 120 may be connected with a connecting member 130. Under normal working conditions, the door body 120 may be movable relative to the main body driven by the connecting member 130. The braking mechanism 140 may include a first elastic member 1410, a limiting component 1420, and a stop member 1430. The braking mechanism 140 may be used for emergency braking of the valve. Among them, the stop member 1430 is arranged on the door body 120, and both the first elastic member 1410 and the valve plate 110 are connected to the limiting component 1420.

[0043] The connection situation between the connecting member 130 and the limiting component 1420 may include two cases: being connected to each other and being disconnected. Specifically, in Case 1: When the connecting member 130 is connected to the limiting component 1420, the limiting component 1420 may be in contact with the first elastic member 1410 to make the first elastic member 1410 in a compressed state, and the connecting member 130 may drive the limiting component 1420, the valve plate 110, and the first elastic member 1410 to move relative to the door body 120 together. That is to say, the limiting component 1420, the first elastic member 1410, and the valve plate 110 act as a whole, the connecting member 130 is connected to this whole and drives this whole to move, and this process can be understood as the opening and closing process of the sealing valve 10. At this time, the connecting member 130 and the valve plate 110 are still connected, which is the normal operating state of the sealing valve 10. Among them, the contact between the first elastic member 1410 and the limiting component 1420 can be achieved by reasonable setting of the structures of the first elastic member 1410 and the limiting component 1420. The limiting component 1420 exerts an upward force on the first elastic member 1410, and the first elastic member 1410 remains in a compressed state. In an embodiment where the first elastic member 1410 is a leaf spring, the leaves of the first elastic member 1410 are in a relatively straight state at this time. It should be noted here that the first elastic member 1410 in the figure is in a compressed state, but for clearly showing the connection components and the structure of the first elastic member 1410, the limiting component 1420 and the first elastic member 1410 in the figure are not in contact with each other.

[0044] Case 2: When the connecting member 130 is separated from the limiting component 1420, the first elastic member 1410 can switch to the extended state under its own tension and drive the limiting component 1420 to move until the limiting component 1420 is stuck to the stopper 1430. At this time, the limiting component 1420, the first elastic member 1410, and the valve plate 110 still act as a whole, but this whole is disconnected from the connecting member 130, and this whole will move uncontrollably under the action of gravity and the like. This situation can be understood as an accidental situation such as the fracture of the connecting member 130. When the connecting member 130 is separated from the limiting component 1420, the limiting component 1420 no longer receives the upward force from the connecting member 130, that is, the first elastic member 1410 no longer receives the upward thrust. Under the action of the tension of the first elastic member 1410 itself, it bends downward, pushing the limiting component 1420, so that the limiting component 1420 moves until it is inserted into the stopper 1430 to limit the movement of the valve plate 110.

[0045] For the sealing valve 10 provided by the present application, through the setting of the braking mechanism 140, when situations such as the fracture of the connecting member 130 or the detachment of the connecting member 130 from the valve plate 110 occur, the limiting component 1420 can be stuck to the stopper 1430 to realize the braking of the valve plate 110 and prevent the occurrence of situations such as the falling of the valve plate 110, thereby improving the safety and reliability of the sealing valve 10. When applied to the vacuum pipeline maglev train transportation system, it can better ensure the safety of the system operation.

[0046] Exemplarily, the connecting member 130 can be a steel cable. Considering large-diameter sealing valves 10, the diameter of some sealing valves 10 can reach 5m, and the weight of their valve plates 110 is usually large. The connecting member 130 can include four steel cables. Through tests, each steel cable can have a load-bearing capacity of 50 tons. Such a setting of the connecting member 130 is sufficient to ensure the reliability of the traction process of the valve plate 110, and thus ensure the reliability of the overall operation of the sealing valve 10. Exemplarily, a corrugated pipe can be arranged outside the connecting member 130. The corrugated pipe can have better sealing performance, prevent the leakage of the medium and prevent external pollutants from invading, ensuring the safety and reliability of the sealing valve 10. Especially in high-pressure, high-temperature or chemically corrosive environments, the sealing effect of the corrugated pipe is particularly crucial. In addition, the sealing performance of the corrugated pipe is also reflected in its stability under dynamic working conditions. Even under repeated cyclic loading, it can maintain a long-term sealing effect, ensuring the sealing reliability of the sealing valve 10 under various working conditions.

[0047] Exemplarily, with reference to Figure 2 and Figure 4, the limiting component 1420 may include a pressing member 1421 and a limiting member 1422 movably connected to the pressing member 1421. When the connecting member 130 is connected to the pressing member 1421, the pressing member 1421 may be in contact with the first elastic member 1410 to compress the first elastic member 1410. When the connecting member 130 is separated from the pressing member 1421, the first elastic member 1410 switches to the extended state under its own tension and pushes the pressing member 1421, and the pressing member 1421 drives the limiting member 1422 to rotate until the limiting member 1422 is engaged with the stopper 1430. Specifically, the first elastic member 1410 switches from the compressed state to the extended state under its own tension, and the first elastic member 1410 bends in the vertical direction and pushes the pressing member 1421 downward. When the pressing member 1421 moves downward, it drives the limiting member 1422 to rotate until the limiting member 1422 is engaged with the stopper 1430. In this way, through the linkage between the pressing member 1421 and the limiting member 1422, the braking of the valve plate 110 is achieved, the structural arrangement is simple, and the braking process is more reliable. In an embodiment not shown, other structural members may be used to cause the first elastic member to drive the limiting member to rotate while switching states.

[0048] Exemplarily, continue to refer in combination with Figure 2 and Figure 4, the limiting member 1422 may include a first limiting arm 1423 and a second limiting arm 1424 that are movably connected to the pressing member 1421 and are respectively located on opposite sides of the pressing member 1421. The first limiting arm 1423 may have a first connecting portion 1425 connected to the valve plate 110, and the second limiting arm 1424 may have a second connecting portion 1426 connected to the valve plate 110. When the first elastic member 1410 switches from the compressed state to the extended state, the first limiting arm 1423 rotates around the first connecting portion 1425 driven by the pressing member 1421, and the end of the first limiting arm 1423 away from the second limiting arm 1424 moves in a direction away from the second limiting arm 1424; and / or the second limiting arm 1424 rotates around the second connecting portion 1426 driven by the pressing member 1421, and the end of the second limiting arm 1424 away from the first limiting arm 1423 moves in a direction away from the first limiting arm 1423. This process can be understood as the first limiting arm 1423 and the second limiting arm 1424 gradually spreading apart, and the spread first limiting arm 1423 and second limiting arm 1424 can be snapped into the stopper 1430. In this way, the first limiting arms 1423 and the second limiting arms 1424 on both sides rotate and are snapped into the stopper 1430, resulting in a better braking effect and higher reliability. Exemplarily, the first limiting arm 1423 and the second limiting arm 1424 can both be arc-shaped and symmetrically arranged. Exemplarily, the first elastic member 1410 may include a leaf spring, and both ends of the leaf spring may be respectively connected with a first connecting arm and a second connecting arm. The first connecting arm may be connected to the first limiting arm 1423, and the second connecting arm may be connected to the second limiting arm 1424. Correspondingly, the stoppers 1430 may be respectively arranged on opposite sides of the door body 120 and correspond to the first limiting arm 1423 and the second limiting arm 1424 one by one.

[0049] Exemplarily, referring to Figure 1 and Figure 4 , the valve plate 110 can move relative to the door body 120 in the vertical direction driven by the connecting member 130. This vertical direction is relative to the ground. That is to say, when the valve plate 110 moves, it only involves overcoming the force in the vertical direction (i.e., gravity), avoiding friction in the horizontal direction, reducing the friction between the valve plate 110 and the door body 120, reducing the wear of the valve plate 110 and the door body 120, and prolonging the service life of the sealing valve 10.

[0050] Exemplarily, continuing to refer to Figure 1 and Figure 4, the stopper 1430 may include a plurality of teeth arranged in the vertical direction. It can be understood that during the downward fall of the valve plate 110, the limiting component 1420 will pass through a plurality of teeth, and each tooth provides an opportunity to catch the limiting component 1420. Any successful catch can achieve the braking of the valve plate 110. With the stopper 1430 arranged in this way, the braking process is more reliable.

[0051] Exemplarily, a through - opening may be provided on the door body 120. The valve plate 110 can move relative to the door body 120 between an open position and a closed position. When the valve plate 110 is in the closed position, it can block the through - opening and when in the open position, it can expose the through - opening. It can be understood that the movement of the valve plate 110 between the open position and the closed position is the opening and closing of the sealing valve 10. When applied to the vacuum pipeline maglev train transportation system, when the valve plate 110 is in the open position, the vacuum pipeline maglev train can pass through the through - opening. When the valve plate 110 is in the closed position, it can achieve a blocking effect to facilitate ensuring the vacuum environment inside the vacuum pipeline.

[0052] Exemplarily, with reference to Figure 6 , Figure 7 and Figure 8 , a sealing structure 150 may be provided on the outer periphery of the through - opening. The sealing structure 150 may have a first state and a second state. In the second state, the sealing structure 150 is in contact with the valve plate 110, and in the first state, the sealing structure 150 is spaced apart from the valve plate 110. It can be understood in this way that in the second state, sealing is achieved through the contact between the sealing structure 150 and the valve plate 110 to better ensure the sealing effect of the sealing valve 10. At this time, the valve plate 110 is in the closed position. When the valve plate 110 needs to move, whether it moves from the open position to the closed position or from the closed position to the open position, the sealing structure 150 is controlled to the first state, and the sealing structure 150 is spaced apart from the valve plate 110 to avoid affecting the movement of the valve plate 110 and make the movement process of the valve plate 110 have less resistance. In this way, the sealing effect of the sealing valve 10 is ensured, and at the same time, the movement of the valve is facilitated. Moreover, the spaced - apart sealing structure 150 and valve plate 110 do not contact each other, which can better avoid the wear of the sealing structure 150 and improve the durability. Specifically, the sealing structure 150 may be connected to the door body 120. Exemplarily, there may be two sealing structures 150 and they are respectively located on opposite sides of the valve plate 110 to better ensure the sealing of the sealing valve 10. Exemplarily, the sealing structure 150 may be adapted to the shape of the through - opening. For example, in the illustrated embodiment, both the through - opening and the valve plate 110 are circular, and the sealing structure 150 may be arranged in a ring around the through - opening.

[0053] Exemplarily, with reference to Figure 8, the sealing structure 150 may include a flexible member 1510, and the switching of the sealing structure 150 from the first state to the second state is achieved by injecting fluid into the interior of the flexible member 1510. Herein, the second state may be understood as the state where the interior of the flexible member 1510 is filled with more fluid or even filled to the point of expansion, and the interior of the first state may be empty or in a state with relatively less fluid. Exemplarily, the flexible member 1510 may also have a certain elasticity. The second state may be the expanded state of the flexible member 1510. Thus, by injecting or discharging fluid, the switching of the state of the sealing structure 150 is achieved, and the process is simpler and more efficient. In an embodiment not shown, the switching of the sealing structure from the first state to the second state may be achieved by other means. For example, a movable sealing structure may be provided, and the switching between the first state and the second state is achieved by moving the sealing structure.

[0054] Exemplarily, continuing to refer to Figure 8 , a mounting groove 1210 may be provided in a portion of the door body 120 corresponding to the outer periphery of the through-port, and at least a portion of the structure of the flexible member 1510 is located in the mounting groove 1210. When the valve plate 110 is in the closed position, a sealing space is formed between the mounting groove 1210 and the valve plate 110, and at least a portion of the structure of the flexible member 1510 is located in this sealing space. When fluid is filled into the flexible member 1510, the flexible member 1510 expands and gradually fills this sealing space to achieve a sealing effect. The flexible member 1510 is accommodated in the mounting groove 1210, and the position is more stable, ensuring the stability of the sealing effect.

[0055] Exemplarily, continuing to refer to Figure 8, a pressing block 1220 may also be provided in the installation groove 1210. The sealing structure 150 further includes an installation rib 1520 connected to the flexible member 1510. The installation rib 1520 is clamped between the pressing block 1220 and the bottom of the installation groove 1210. The fastener 1530 passes through the pressing block 1220 and the installation rib 1520 and is connected to the door body 120. It can be understood in this way that the flexible member 1510 is similar to an annular sealing ring and is not easy to be fixed. The installation rib 1520 protrudes from the surface of the annular sealing ring, and the overall fixing of the sealing structure 150 is realized by fixing the installation rib 1520. Such a setting can better ensure the stability of the position of the sealing structure 150, and further ensure the stability of the sealing effect. The material of the installation rib 1520 may be the same as that of the flexible member 1510. Exemplarily, the sealing structure 150 as a whole may be an integral part. Exemplarily, installation ribs 1520 may be provided at both ends of the flexible member 1510, and the pressing blocks 1220 are correspondingly provided as two and are both connected to the door body 120 through the fasteners 1530. The shape of the flexible member 1510 can be arbitrarily set according to the use requirements. For example, the part of the flexible member 1510 located in the installation groove 1210 may have two protruding parts. One side of the two protruding parts is in contact with the pressing block 1220, and the other side is in contact with the valve plate 110, so the sealing performance is better. Through the cooperative setting of the pressing block 1220, the fastener 1530, the sealing structure 150 and the door body 120, the exchange of air or liquid between the door body 120 and the outside can be better avoided, and the safety and reliability of the sealing valve 10 are further ensured.

[0056] Exemplarily, continue to refer to Figure 8 , the sealing structure 150 may further include a flow channel 1540 communicating with the inside of the flexible member 1510. The fluid is injected into the inside of the flexible member 1510 or discharged from the inside of the flexible member 1510 through the flow channel 1540. In this way, it is convenient for the sealing structure 150 to switch between the first state and the second state. The flow channels 1540 may be multiple and are spaced apart from each other. Exemplarily, each flexible member 1510 may be provided with three flow channels 1540 spaced apart from each other. Different degrees of sealing effects can be achieved by filling different fluids.

[0057] Exemplarily, in combination with reference to Figure 3 , Figure 4 , Figure 5 , Figure 9 and Figure 10, a balance component 160 may also be provided on the door body 120. When the valve plate 110 is in the closed position, the balance component 160 can be inserted between the valve plate 110 and the door body 120 to limit the valve plate 110. At this time, a part of the structure of the balance component 160 is located within the through opening. When the valve plate 110 leaves the closed position, the balance component 160 can be spaced apart from the through opening, that is, there is no contact with the valve plate 110. In this way, when the valve plate 110 is in the closed position, the balance component 160 is located between the valve plate 110 and the main body, and can balance the external forces on both sides of the valve plate 110. Especially in the embodiment where sealing structures 150 are provided on both sides of the valve plate 110, such a setting can better balance the forces on the sealing structures 150 on both sides, reduce the excessive loss of one side of the sealing structure 150 due to uneven force, make the forces on the two sealing structures 150 more balanced, and the losses are also more balanced, ensuring the overall durability of the sealing valve 10. When the valve plate 110 leaves the closed position, the balance component 160 is spaced apart from the through opening, which can avoid the contact between the balance component 160 and the valve plate 110 during the movement of the valve plate 110, reduce the friction on the valve plate 110, and ensure the smoothness of the movement process of the valve plate 110.

[0058] Exemplarily, with reference to Figure 3 , Figure 5 and Figure 9 , the balance component 160 may include a second elastic member 1610 and a rotating member 1620. The rotating member 1620 includes a first rotating end 1621 connected to the second elastic member 1610 and a second rotating end 1622 opposite to the first rotating end 1621. When the valve plate 110 is in the closed position, the valve plate 110 presses the first rotating end 1621 to make the second rotating end 1622 insert between the valve plate 110 and the door body 120; when the valve plate 110 is in the open position, the second elastic member 1610 extends under its own tension to space the second rotating end 1622 from the through opening. The second elastic member 1610 can be connected to the door body 120. In this way, through the extrusion of the second elastic member 1610 by the valve plate 110, the rotating member 1620 is driven to rotate, the transmission structure is simpler, the stability is higher, and the production cost and maintenance cost are lower.

[0059] Exemplarily, with reference to Figure 3 , Figure 9 and Figure 10, on the side of the rotating member 1620 facing the valve plate 110, a first rib 1623 and a second rib 1624 may be provided. When the valve plate 110 is in the closed position, the first rib 1623 and the second rib 1624 are respectively located on opposite sides of the valve plate 110. The first rib 1623 is inserted between the first side of the valve plate 110 and the door body 120, and the second rib 1624 is inserted between the second side of the valve plate 110 and the door body 120. The overall structure of the rotating member 1620 is simpler, and the provision of the first rib 1623 and the second rib 1624 can effectively enhance the overall strength of the rotating member 1620 and better ensure the balance effect of the balance assembly 160.

[0060] Exemplarily, referring to Figure 1 , the valve plate 110 may be an arc-shaped structure. In this way, the structural strength and rigidity of the valve plate 110 can be better ensured.

[0061] Exemplarily, continuing to refer to Figure 1 , one side of the valve plate 110 is recessed and the other side is correspondingly convex. A reinforcing rib 1110 may be provided on the recessed side of the valve plate 110. With this arrangement, while ensuring the structural strength and rigidity of the valve plate 110, the weight of the valve plate 110 can be minimized as much as possible. Exemplarily, the reinforcing rib 1110 may include an annular reinforcing rib 1110 and / or a cross-shaped reinforcing rib 1110. Exemplarily, the valve plate 110 may be made of A36 alloy steel material.

[0062] Exemplarily, in a maglev train transportation system in a vacuum pipeline applying any one of the above-mentioned sealing valves 10, the maglev train transportation system in a vacuum pipeline may include a plurality of vacuum pipelines, and a sealing valve 10 is provided between two adjacent vacuum pipelines. In this way, through the opening and closing of the sealing valve 10, the connection or independence between two adjacent vacuum pipelines is achieved.

[0063] During the use of the maglev train transportation system in a vacuum pipeline, the evacuation process can be achieved through the use of the sealing valve 10, specifically as follows: The driving device drives the valve plate 110 to move to the closed position through the connecting member 130, fluid is introduced into the flexible member 1510, and the sealing structure 150 switches from the second state to the first state to achieve the seal between the valve plate 110 and the door body 120, ensuring the sealing performance of the vacuum pipeline, and the balance assembly 160 is inserted between the valve plate 110 and the door body 120. At this time, each vacuum pipeline is relatively closed and independent. Subsequently, each vacuum pipeline can be evacuated separately, thereby accelerating the evacuation speed and improving the overall efficiency. After the evacuation is completed, the fluid in the flexible member 1510 is discharged outward, the balance assembly 160 rotates and is spaced apart from the through-port, and the connecting member 130 drives the valve plate 110 to rise and move towards the open position, restoring the connectivity between the vacuum pipelines.

[0064] When performing maintenance and repair operations on a vacuum pipeline, it can be as follows. First, seal and isolate both ends of the vacuum pipeline section to be repaired using the sealing valves 10. Then, inject air into the vacuum pipeline to form a local environment with an atmospheric environment at one end and a vacuum state maintained at the other end. This design allows maintenance personnel to safely carry out inspection and repair work in an atmospheric environment while avoiding potential risks of the vacuum environment to the repair operation. Through this maintenance and repair strategy, both the safety of workers can be ensured and the efficiency and quality of the repair work can be improved.

[0065] For ease of description, relative regional terms such as "above...", "over...", "on the upper surface of...", "upper...", etc. can be used here to describe the regional positional relationship between one or more components or features shown in the figure and other components or features. It should be understood that relative regional terms not only include the orientation of the components described in the figure but also different orientations during use or operation. For example, if the components in the attached figure are inverted as a whole, then the components "above other components or features" or "over other components or features" will include the situation where the components are "below other components or structures" or "under other components or structures". Thus, the exemplary term "above..." can include both the orientations of "above..." and "below...". In addition, these components or features can also be positioned at other different angles (such as rotated 90 degrees or other angles), and this document intends to cover all such situations.

[0066] It should be noted that the terms used here are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used here, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, components, assemblies, and / or combinations thereof.

[0067] It should be noted that the terms "first", "second", etc. in the description, claims, and above-mentioned drawings of the present application are used to distinguish similar objects and do not necessarily need to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present application described here can be implemented in an order other than those illustrated or described here.

[0068] The present utility model has been described through the above embodiments. However, it should be understood that the above embodiments are only for illustrative and explanatory purposes, and are not intended to limit the present utility model to the scope of the described embodiments. In addition, those skilled in the art can understand that the present utility model is not limited to the above embodiments, and more variations and modifications can be made according to the teachings of the present utility model, and these variations and modifications all fall within the scope of protection required by the present utility model. The scope of protection of the present utility model is defined by the appended claims and their equivalent scope.

Claims

1. A sealing valve, characterized in that: include: Valve plate (110); a door body (120), wherein the door body (120) is connected to a connecting piece (130); and A braking mechanism (140), the braking mechanism (140) comprising a first elastic member (1410), a limiting assembly (1420) and a stopper (1430), wherein the stopper (1430) is arranged on the door body (120), and the first elastic member (1410) and the valve plate (110) are both connected to the limiting assembly (1420); When the connecting member (130) is connected to the limiting assembly (1420), the limiting assembly (1420) fits with the first elastic member (1410) so that the first elastic member (1410) is in a compressed state, and the connecting member (130) drives the limiting assembly (1420), the valve plate (110) and the first elastic member (1410) to move relative to the door body (120); when the connecting member (130) is separated from the limiting assembly (1420), the first elastic member (1410) switches to an extended state under the action of its own tension and drives the limiting assembly (1420) to move until the limiting assembly (1420) is stuck to the stop member (1430).

2. The sealing valve according to claim 1, characterized in that: The limiting component (1420) comprises a pressing member (1421) and a limiting member (1422) movably connected to the pressing member (1421). When the connecting member (130) is connected to the pressing member (1421), the pressing member (1421) fits with the first elastic member (1410) so that the first elastic member (1410) is in a compressed state; when the connecting member (130) is separated from the pressing member (1421), the first elastic member (1410) switches to an extended state under the action of its own tension and pushes the pressing member (1421), and the pressing member (1421) drives the limiting member (1422) to rotate until the limiting member (1422) is stuck to the stop member (1430).

3. The sealing valve according to claim 2, characterized in that: The limiting member (1422) comprises a first limiting arm (1423) and a second limiting arm (1424) which are movably connected to the pressing member (1421) and are respectively located on opposite sides of the pressing member (1421), wherein the first limiting arm (1423) has a first connecting portion (1425) connected to the valve plate (110), and the second limiting arm (1424) has a second connecting portion (1426) connected to the valve plate (110). When the first elastic member (1410) switches from the compressed state to the extended state, The first limiting arm (1423) rotates around the first connecting portion (1425) driven by the pressing member (1421), and the end of the first limiting arm (1423) away from the second limiting arm (1424) moves in a direction away from the second limiting arm (1424); and / or Driven by the pressing member (1421), the second limiting arm (1424) rotates around the second connecting portion (1426), and the end of the second limiting arm (1424) away from the first limiting arm (1423) moves in a direction away from the first limiting arm (1423).

4. The sealing valve according to claim 1, characterized in that: Driven by the connecting member (130), the valve plate (110) moves in a vertical direction relative to the door body (120).

5. The sealing valve according to claim 1, characterized in that: The stopper (1430) includes a plurality of latch teeth arranged in a vertical direction.

6. The sealing valve according to any one of claims 1 to 5, characterized in that: The door body (120) is provided with a through opening, and the valve plate (110) moves between an open position and a closed position relative to the door body (120). The valve plate (110) blocks the through opening when it is in the closed position and exposes the through opening when it is in the open position.

7. The sealing valve according to claim 6, characterized in that: A sealing structure (150) is provided on the periphery of the through opening, and the sealing structure (150) has a first state and a second state. In the second state, the sealing structure (150) is in contact with the valve plate (110), and in the first state, the sealing structure (150) is spaced apart from the valve plate (110).

8. The sealing valve according to claim 7, characterized in that: The sealing structure (150) comprises a flexible member (1510), and the sealing structure (150) is switched from the first state to the second state by injecting fluid into the interior of the flexible member (1510).

9. The sealing valve according to claim 8, characterized in that: The door body (120) is provided with a mounting groove (1210) at a portion corresponding to the outer periphery of the through opening, and at least a portion of the structure of the flexible member (1510) is located in the mounting groove (1210).

10. The sealing valve according to claim 9, characterized in that: A pressure block (1220) is also arranged in the installation groove (1210), and the sealing structure (150) also includes a mounting ridge (1520) connected to the flexible member (1510), and the mounting ridge (1520) is clamped between the pressure block (1220) and the bottom of the installation groove (1210), and a fastener (1530) passes through the pressure block (1220) and the mounting ridge (1520) to be connected to the door body (120).

11. The sealing valve according to claim 10, characterized in that: The sealing structure (150) further comprises a circulation channel (1540) communicating with the interior of the flexible member (1510), and the fluid is injected into the interior of the flexible member (1510) or discharged from the interior of the flexible member (1510) through the circulation channel (1540).

12. The sealing valve according to claim 6, characterized in that: A balancing component (160) is also provided on the door body (120); when the valve plate (110) is in the closing position, the balancing component (160) is inserted between the valve plate (110) and the door body (120) to limit the valve plate (110); when the valve plate (110) leaves the closing position, the balancing component (160) is separated from the through port.

13. The sealing valve according to claim 12, characterized in that: The balancing component (160) comprises a second elastic member (1610) and a rotating member (1620), wherein the rotating member (1620) comprises a first rotating end (1621) connected to the second elastic member (1610) and a second rotating end (1622) opposite to the first rotating end (1621). When the valve plate (110) is in the closing position, the valve plate (110) squeezes the first rotating end (1621) so that the second rotating end (1622) is inserted between the valve plate (110) and the door body (120); when the valve plate (110) is in the opening position, the second elastic member (1610) stretches under the action of its own tension so that the second rotating end (1622) is separated from the through opening.

14. The sealing valve according to claim 13, characterized in that: The rotating member (1620) is provided with a first convex rib (1623) and a second convex rib (1624) on the side facing the valve plate (110); when the valve plate (110) is in the closing position, the first convex rib (1623) and the second convex rib (1624) are respectively located on opposite sides of the valve plate (110).

15. The sealing valve according to claim 1, characterized in that: The valve plate (110) is a curved surface structure.

16. The sealing valve according to claim 15, characterized in that: One side of the valve plate (110) is concave and the other side is correspondingly convex, and a reinforcing rib (1110) is provided on the concave side of the valve plate (110).

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