Sealing valve

Abstract

The invention 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 invention relates to the technical field of vacuum sealing, and in particular to a sealing valve. Background Art

[0002] In recent years, with the continuous advancement of science and technology, more and more scenarios require the environment to remain in a vacuum state, such as vacuum tube maglev trains. Aerospace and national defense also involve more and more production and testing in vacuum environments.

[0003] In order to ensure the vacuum state of the environment, a sealing device is usually set up to isolate the internal environment from the external environment. Taking the vacuum tube maglev train transportation system as an example, multiple vacuum tubes are usually set up, and sealing valves are set at the ends of the vacuum tubes. During operation, the opening and closing of the sealing valves are involved to achieve the passage of the vacuum tube maglev train or the isolation and maintenance of specific vacuum tubes. However, when the sealing valve is working, the valve plate may fall out of control, affecting the safety of the vacuum tube maglev train transportation system. Summary of the invention

[0004] In order to at least partially solve the problems existing in the prior art, according to one aspect of the present invention, a sealing valve is provided. The sealing valve comprises: a valve plate; a door body, the door body is connected with a connecting piece; and a braking mechanism, the braking mechanism comprises a first elastic member, a limiting assembly and a stopper, wherein the stopper is arranged on the door body, and the first elastic member and the valve plate are both connected with the limiting assembly; when the connecting piece is connected with the limiting assembly, the limiting assembly fits with the first elastic member so that the first elastic member is in a compressed state, and the connecting piece drives the limiting assembly, the valve plate and the first elastic member to move relative to the door body; when the connecting piece is separated from the limiting assembly, the first elastic member switches to an extended state under the action of its own tension and drives the limiting assembly to move until the limiting assembly is stuck to the stopper.

[0005] The sealing valve provided by the present application, through the setting of the braking mechanism, when the connecting piece breaks, the connecting piece is separated from the valve plate, etc., the limit assembly can be stuck to the stopper to brake the valve plate, prevent the valve plate from falling, etc., and improve the safety and reliability of the sealing valve. When applied to the vacuum pipeline maglev train transportation system, the safety of system operation can be better guaranteed.

[0006] Exemplarily, the limiting assembly includes a pressing member and a limiting member movably connected to the pressing member. When the connecting member is connected to the pressing member, the pressing member fits with the first elastic member so that the first elastic member is in a compressed state. When the connecting member 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. 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 movably connected to the pressing member and respectively located on opposite sides of the pressing member, the first limiting arm having a first connecting portion connected to the valve plate, and the second limiting arm having 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 connection portion under the drive of the pressing member, and an 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 in a vertical direction relative to the door body under the drive of the connecting member.

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

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

[0013] Exemplarily, a sealing structure is provided at the periphery of the through port, and the sealing structure has a first state and a second state. In the second state, the sealing structure is in contact 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 sealing structure is switched from a first state to a second state by injecting fluid into the interior of the flexible member.

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

[0016] Exemplarily, a pressure block is also arranged in the installation groove, and the sealing structure also includes a mounting convex strip connected to the flexible member, the mounting convex strip is clamped between the pressure block and the bottom of the installation groove, and the fastener passes through the pressure block and the mounting convex strip and is connected to the door body.

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

[0018] Exemplarily, a balancing assembly is also provided on the door body. When the valve plate is in the closing 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 closing position, the balancing assembly is separated from the through port.

[0019] Exemplarily, the balancing assembly includes a second elastic member and a rotating member, wherein 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 squeezes 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 stretches under its own tension to separate the second rotating end from the through port.

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

[0022] Exemplarily, the valve plate is a curved surface 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 summary of the invention, which will be further described in detail in the detailed description. The summary of the invention is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0025] The advantages and features of the present invention are described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The following drawings of the present invention are used as part of the present invention for understanding the present invention. The drawings show the embodiments of the present invention and their descriptions, and are used to explain the principles of the present invention. In the drawings,

[0027] Figure 1 A perspective view of a sealing valve according to an exemplary embodiment of the present invention;

[0028] Figure 2 for Figure 1 A partial enlarged view of part A;

[0029] Figure 3 for Figure 1 A partial enlarged view of part B;

[0030] Figure 4 A front view of a sealing valve according to an exemplary embodiment of the present invention;

[0031] Figure 5 for Figure 4 A partial enlarged view of part C in the middle;

[0032] Figure 6A side view of a sealing valve according to an exemplary embodiment of the present invention;

[0033] Figure 7 for Figure 6 A partial enlarged view of part D in the middle;

[0034] Figure 8 for Figure 7 A partial enlarged view of part E in the middle;

[0035] Fig. 9 A perspective view of a partial structure of a sealing valve according to an exemplary embodiment of the present invention; and

[0036] Fig.10 for Fig. 9 A partial enlarged view of part F.

[0037] The above drawings include the following reference numerals:

[0038] 10. Sealing valve; 110. Valve plate; 1110. Reinforcing rib; 120. Door body; 1210. Mounting groove; 1220. Press block; 130. Connecting member; 140. Braking mechanism; 1410. First elastic member; 1420. Limiting assembly; 1421. Pressing member; 1422. Limiting member; 1423. First limiting arm; 1424. Second limiting arm; 1425. First connecting portion; 1426. Second connecting portion; 1430. Stop member; 150. Sealing structure; 1510. Flexible member; 1520. Mounting convex strip; 1530. Fastener; 1540. Circulation channel; 160. Balance assembly; 1610. Second elastic member; 1620. Rotating member; 1621. First rotating end; 1622. Second rotating end; 1623. First convex rib; 1624. Second convex rib. DETAILED DESCRIPTION

[0039] In the following description, a large amount of details are provided so that the present invention can be thoroughly understood. However, it will be appreciated by those skilled in the art that the following description only exemplarily illustrates a preferred embodiment of the present invention, and the present invention can be implemented without one or more such details. In addition, in order to avoid confusion with the present invention, some technical features well known in the art are not described in detail.

[0040] In order to fully understand the embodiments of the present invention, detailed structures will be presented in the following description. Obviously, the implementation of the embodiments of the present invention is not limited to the specific details familiar to those skilled in the art. The preferred embodiments of the present invention are described in detail below, but in addition to these detailed descriptions, the present invention may also have other embodiments.

[0041] The embodiment of the present invention provides a sealing valve, which can be applied to any scene requiring a vacuum environment, including but not limited to vacuum pipeline maglev train transportation systems, and ground simulation equipment in aerospace and national defense.

[0042] Combined with reference Figure 1 , Figure 2 and Figure 4 The sealing valve 10 may include a valve plate 110, a door body 120 and a brake mechanism 140. The door body 120 may be connected to a connector 130. Under normal working conditions, the door body 120 may be movable relative to the main body driven by the connector 130. The brake mechanism 140 may include a first elastic member 1410, a limit assembly 1420 and a stopper 1430. The brake mechanism 140 may be used to perform emergency braking on the valve. The stopper 1430 is disposed on the door body 120, and the first elastic member 1410 and the valve plate 110 are both connected to the limit assembly 1420.

[0043] The connection between the connector 130 and the limiting component 1420 may include two types: connected to each other and disconnected. Specifically, in case 1: when the connector 130 is connected to the limiting component 1420, the limiting component 1420 can fit with the first elastic component 1410 to make the first elastic component 1410 in a compressed state, and the connector 130 can drive the limiting component 1420, the valve plate 110 and the first elastic component 1410 to move relative to the door body 120. In other words, the limiting component 1420, the first elastic component 1410 and the valve plate 110 are together as a whole, and the connector 130 is connected to the whole and drives the whole to move. This process can be understood as the opening and closing process of the sealing valve 10. At this time, the connector 130 and the valve plate 110 are still connected, which is the normal operating state of the sealing valve 10. The fit between the first elastic member 1410 and the limiting assembly 1420 can be achieved by reasonably setting the structures of the first elastic member 1410 and the limiting assembly 1420. The limiting assembly 1420 applies an upward force to the first elastic member 1410, and the first elastic member 1410 remains in a compressed state. In the embodiment where the first elastic member 1410 is a leaf spring, the steel plate of the first elastic member 1410 at this time remains in a relatively straight state. It should be noted here that the first elastic member 1410 in the figure is in a compressed state, but in order to clearly show the structure of the connecting assembly and the first elastic member 1410, the limiting assembly 1420 and the first elastic member 1410 in the figure are not fitted to each other.

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

[0045] The sealing valve 10 provided in the present application, through the setting of the braking mechanism 140, when the connecting member 130 breaks, the connecting member 130 is separated from the valve plate 110, etc., the limiting component 1420 can be stuck to the stopper 1430 to brake the valve plate 110, prevent the valve plate 110 from falling, etc., and improve the safety and reliability of the sealing valve 10. When applied to the vacuum pipeline maglev train transportation system, the safety of the system operation can be better guaranteed.

[0046] Exemplarily, the connector 130 may be a steel cable. Considering the large-caliber sealing valve 10, the diameter of some sealing valves 10 may reach 5m, and the weight of the valve plate 110 is usually large. The connector 130 may include four steel cables. According to the test, each steel cable can have a load-bearing capacity of 50 tons. The connector 130 arranged in this way is sufficient to ensure the reliability of the traction process of the valve plate 110, and then ensure the reliability of the overall operation of the sealing valve 10. Exemplarily, a bellows may be arranged on the outside of the connector 130, and the bellows may have better sealing performance, prevent leakage of the medium and prevent external contaminants from intruding, thereby 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 bellows is particularly critical. In addition, the sealing performance of the bellows is also reflected in its stability under dynamic 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] For example, in conjunction with reference Figure 2 and Figure 4, the limiting assembly 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 fit with the first elastic member 1410 to put the first elastic member 1410 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 stopper 1430. Specifically, the first elastic member 1410 switches from a compressed state to an extended state under the action of its own tension, and the first elastic member 1410 bends in a vertical direction and pushes the pressing member 1421 downward. The pressing member 1421 moves downward, which drives the limiting member 1422 to rotate until the limiting member 1422 is stuck to the stopper 1430. In this way, the valve plate 110 is braked by the linkage between the pressing member 1421 and the limiting member 1422, the structure is simple, and the braking process is more reliable. In an embodiment not shown, other structural members can be used to make the first elastic member drive the limiting member to rotate while switching the state.

[0048] For example, continue to combine with reference Figure 2 and Figure 4The 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 connection portion 1425 connected to the valve plate 110, and the second limiting arm 1424 may have a second connection portion 1426 connected to the valve plate 110. When the first elastic member 1410 switches from a compressed state to an extended state, the first limiting arm 1423 rotates around the first connection portion 1425 driven by the pressing member 1421, and one 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 connection portion 1426 driven by the pressing member 1421, and one 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 limit arm 1423 and the second limit arm 1424 gradually open, and the first limit arm 1423 and the second limit arm 1424 after opening can be stuck in the stopper 1430. In this way, the first limit arm 1423 and the second limit arm 1424 on both sides rotate and are stuck in the stopper 1430, and the braking effect is better and the reliability is higher. Exemplarily, the first limit arm 1423 and the second limit arm 1424 can both be arc-shaped and symmetrically arranged. Exemplarily, the first elastic member 1410 can include a rigid leaf spring, and the two ends of the rigid leaf spring can be respectively connected to the first connecting arm and the second connecting arm, the first connecting arm can be connected to the first limit arm 1423, and the second connecting arm can be connected to the second limit arm 1424. Correspondingly, the stopper 1430 can be respectively arranged on the opposite sides of the door body 120, corresponding to the first limit arm 1423 and the second limit arm 1424 one by one.

[0049] For example, refer to Figure 1 and Figure 4 The valve plate 110 can move in the vertical direction relative to the door body 120 driven by the connecting member 130. The vertical direction is relative to the ground, that is, 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 friction between the valve plate 110 and the door body 120, reducing wear of the valve plate 110 and the door body 120, and extending the service life of the sealing valve 10.

[0050] For example, continue to refer to Figure 1 and Figure 4The stopper 1430 may include a plurality of latching teeth arranged in the vertical direction. It is understandable that, during the falling process of the valve plate 110, the limit assembly 1420 will pass through a plurality of latching teeth, each of which provides an opportunity to latch the limit assembly 1420, and any successful one 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, and the valve plate 110 may move between an open position and a closed position relative to the door body 120. The valve plate 110 may block the through opening when it is in the closed position and may expose the through opening when it is in the open position. It is understandable 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 a vacuum pipeline maglev train transportation system, the valve plate 110 is in the open position, and the vacuum pipeline maglev train can pass through the through opening. When the valve plate 110 is in the closed position, a barrier effect can be achieved, which is convenient for ensuring the vacuum environment in the vacuum pipeline.

[0052] For example, in conjunction with reference Figure 6 , Figure 7 and Figure 8 , a sealing structure 150 may be provided on the periphery of the through port, and the sealing structure 150 may have a first state and a second state, in which the sealing structure 150 fits with the valve plate 110 in the second state, and in the first state, the sealing structure 150 is spaced apart from the valve plate 110. It can be understood that in the second state, the sealing is achieved by the fit of the sealing structure 150 and the valve plate 110 to better ensure the sealing effect of the sealing valve 10, and the valve plate 110 is in the closed position at this time. 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, so that the resistance of the movement process of the valve plate 110 is smaller. 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. In addition, the spaced sealing structure 150 and the 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, which are respectively located on opposite sides of the valve plate 110, so as to better ensure the sealing performance of the sealing valve 10. Exemplarily, the sealing structure 150 may be adapted to the shape of the through port. For example, in the illustrated embodiment, the through port and the valve plate 110 are both circular, and the sealing structure 150 may be arranged in a ring shape around the through port.

[0053] For example, refer to Figure 8, the sealing structure 150 may include 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. Among them, the second state can be understood as the interior of the flexible member 1510 is filled with more fluid or even filled to expansion, and the interior of the first state may be empty or relatively less fluid. Exemplarily, the flexible member 1510 may also have a certain elasticity. The second state may be an expanded state of the flexible member 1510. In this way, the state switching of the sealing structure 150 is achieved by injecting fluid or discharging fluid, 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 can be achieved by other means. For example, a movable sealing structure can be provided, and the switching between the first state and the second state is achieved by moving the sealing structure.

[0054] For example, continue to refer to Figure 8 , the portion of the door body 120 corresponding to the outer periphery of the through opening may be provided with a mounting groove 1210, and at least part 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 sealed space is formed between the mounting groove 1210 and the valve plate 110, and at least part of the structure of the flexible member 1510 is located in the sealed space. When the flexible member 1510 is filled with fluid, the flexible member 1510 expands and gradually fills the sealed 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] For example, continue to refer to Figure 8, a pressing block 1220 may also be provided in the mounting groove 1210, and the sealing structure 150 also includes a mounting convex strip 1520 connected to the flexible member 1510, and the mounting convex strip 1520 is sandwiched between the pressing block 1220 and the bottom of the mounting groove 1210, and the fastener 1530 passes through the pressing block 1220 and the mounting convex strip 1520 to be connected to the door body 120. It can be understood that the flexible member 1510 is similar to an annular sealing ring and is not easy to fix. The mounting convex strip 1520 protrudes from the surface of the annular sealing ring, and the fixing of the sealing structure 150 as a whole is achieved by fixing the mounting convex strip 1520. This arrangement can better ensure the stability of the position of the sealing structure 150, and thus ensure the stability of the sealing effect. The material of the mounting convex strip 1520 can be the same as that of the flexible member 1510. Exemplarily, the sealing structure 150 as a whole can be an integral part. Exemplarily, both ends of the flexible member 1510 may be provided with mounting ridges 1520, and the number of the pressing block 1220 is correspondingly two, and both are connected to the door body 120 through the fastener 1530. The shape of the flexible member 1510 may be arbitrarily set according to the use requirements. For example, the portion of the flexible member 1510 located in the mounting groove 1210 may have two protrusions, one side of the two protrusions is in contact with the pressing block 1220, and the other side is in contact with the valve plate 110, so as to achieve better sealing. By means of the coordinated arrangement of the pressing block 1220, the fastener 1530, the sealing structure 150 and the door body 120, the exchange of the door body 120 with the external air or liquid, etc., can be better avoided, and the safety and reliability of the sealing valve 10 can be further ensured.

[0056] For example, continue to refer to Figure 8 The sealing structure 150 may further include a circulation channel 1540 connected to 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. In this way, it is convenient for the sealing structure 150 to switch between the first state and the second state. The circulation channels 1540 may be multiple and spaced apart from each other. Exemplarily, each flexible member 1510 may be provided with three circulation channels 1540 spaced apart from each other. Different degrees of sealing effect can be achieved by filling different fluids.

[0057] For example, in conjunction with reference Figure 3 , Figure 4 , Figure 5 , Fig. 9 and Fig.10, a balancing component 160 can also be provided on the door body 120. When the valve plate 110 is in the closed position, the balancing component 160 can be inserted between the valve plate 110 and the door body 120 to limit the valve plate 110. At this time, part of the structure of the balancing component 160 is located in the through opening. When the valve plate 110 leaves the closed position, the balancing 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 balancing 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. In particular, in the embodiment where the sealing structure 150 is 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 the sealing structure 150 on one side due to uneven force, and the sealing structures 150 on both sides are more balanced in force and loss, thereby ensuring the overall durability of the sealing valve 10. When the valve plate 110 leaves the closing position, the balancing assembly 160 is separated from the through opening, which can avoid contact between the balancing assembly 160 and the valve plate 110 during movement of the valve plate 110, reduce friction on the valve plate 110, and ensure smooth movement of the valve plate 110.

[0058] For example, in conjunction with reference Figure 3 , Figure 5 and Fig. 9 The balancing assembly 160 may include a second elastic member 1610 and a rotating member 1620, wherein 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 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 open position, the second elastic member 1610 stretches under its own tension so that the second rotating end 1622 is separated from the through opening. The second elastic member 1610 may be connected to the door body 120. In this way, the rotating member 1620 is driven to rotate by squeezing the second elastic member 1610 by the valve plate 110, and the transmission structure is simpler to set, with higher stability, and lower production and maintenance costs.

[0059] For example, in conjunction with reference Figure 3 , Fig. 9 and Fig.10, the first convex rib 1623 and the second convex rib 1624 may be provided on the side of the rotating member 1620 facing the valve plate 110, and when the valve plate 110 is in the closed position, the first convex rib 1623 and the second convex rib 1624 are respectively located on opposite sides of the valve plate 110. The first convex rib 1623 is inserted between the first side of the valve plate 110 and the door body 120, and the second convex 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 convex rib 1623 and the second convex rib 1624 can effectively enhance the overall strength of the rotating member 1620, and better ensure the balancing effect of the balancing assembly 160.

[0060] For example, refer to Figure 1 The valve plate 110 may be a curved surface structure, so that the structural strength and rigidity of the valve plate 110 can be better ensured.

[0061] For example, continue to refer to Figure 1 , one side of the valve plate 110 is concave and the other side is correspondingly convex, and a reinforcing rib 1110 may be provided on the concave side of the valve plate 110. In this way, the weight of the valve plate 110 can be reduced as much as possible while ensuring the structural strength and rigidity of the valve plate 110. 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.

[0062] For example, in a vacuum tube maglev train transportation system using any of the above-mentioned sealing valves 10, the vacuum tube maglev train transportation system may include multiple vacuum tubes, and a sealing valve 10 is provided between two adjacent vacuum tubes. In this way, the connection or independence between the two adjacent vacuum tubes is achieved by opening and closing the sealing valve 10.

[0063] During the use of the vacuum pipe maglev train transportation system, the vacuuming process can be achieved by using the sealing valve 10, which can be specifically as follows: the driving device drives the valve plate 110 to move to the closing position through the connecting member 130, and the fluid is introduced into the flexible member 1510. 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 to ensure the sealing of the vacuum pipe. The balance component 160 is inserted between the valve plate 110 and the door body 120. At this time, each vacuum pipe is relatively closed and independent. Subsequently, each vacuum pipe can be individually vacuumed, thereby speeding up the vacuuming speed and improving the overall efficiency. After the vacuuming is completed, the fluid in the flexible member 1510 is discharged outward, the balance component 160 rotates and is separated from the port, and the connecting member 130 drives the valve plate 110 to rise and move to the opening position to restore the connectivity between each vacuum pipe.

[0064] When performing repair and maintenance work on a vacuum pipeline, the specific method is as follows: first, the two ends of the vacuum pipeline section to be repaired are sealed and isolated using a sealing valve 10. Then, the atmosphere is injected into the vacuum pipeline to form a local environment with an atmospheric environment at one end and a vacuum state at the other end. This design allows maintenance personnel to safely perform maintenance work in an atmospheric environment while avoiding the potential risks of a vacuum environment to maintenance operations. Through this repair and maintenance strategy, the safety of workers can be ensured and the efficiency and quality of maintenance work can be improved.

[0065] For ease of description, regional relative terms such as "above", "above", "on the upper surface of", "above", etc. may 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 regional relative terms include not only the orientation of the components as described in the figure, but also different orientations in use or operation. For example, if the components in the accompanying drawings are inverted as a whole, the components "above other components or features" or "above other components or features" will include the situation where the components are "below other components or structures" or "below other components or structures". Therefore, the exemplary term "above" may include both "above" and "below". In addition, these components or features may also be positioned at other different angles (e.g., rotated 90 degrees or other angles), and this article is intended to include all of these situations.

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

[0067] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0068] The present invention has been described by the above embodiments, but it should be understood that the above embodiments are only for the purpose of example and description, and are not intended to limit the present invention to the scope of the described embodiments. In addition, it can be understood by those skilled in the art that the present invention is not limited to the above embodiments, and more variations and modifications can be made according to the teachings of the present invention, and these variations and modifications all fall within the scope of the protection claimed by the present invention. The protection scope of the present invention is defined by the attached claims and their equivalents.

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 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.

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

10. The sealing valve according to claim 9, 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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