Winding type flexible sealing valve and control method thereof

Abstract

The invention discloses a winding type flexible sealing valve and a control method thereof, and the sealing valve comprises a supporting frame which is provided with a valve hole and side walls surrounding the valve hole, the side walls comprise a first side wall and a second side wall which are opposite to each other, and the first side wall and the second side wall form a frame channel; the winding drums comprise a first winding drum and a second winding drum which are mounted on the outer sides of the first side wall and the second side wall respectively, and at least one winding drum is an active winding drum; the strip-shaped flexible valve plate penetrates through the frame channel and is wound on the first winding drum and the second winding drum; the driving mechanism drives the winding cylinder to rotate so as to control the valve plate to move and position relative to the valve hole, the valve plate is provided with at least two sealing faces and at least one circulation face, the sealing faces can completely cover and seal the valve hole, and the circulation face comprises a circulation hole. The containing space of the valve plate is reduced through winding of the two ends of the strip-shaped flexible valve plate. In addition, tensioning force is provided for the valve plate through winding, so that the flexible valve plate can provide a sealing surface sufficient to cut off a medium in a pipeline.

Description

Technical Field

[0001] The present invention relates to a sealing valve, and in particular to a wound flexible sealing valve that can be used in petrochemical equipment and its control method. Background Art

[0002] The gate valve can be used in fields such as petroleum, chemical industry, water conservancy, metallurgy, mining, and electric power. It is a common medium cut-off valve, which mainly consists of components such as a frame, a housing, a gate plate, guide rails, and an opening and closing mechanism. Among them, the housing is disposed through the medium flow channel and is perpendicular to the flow channel direction, and the frame is used for the stay support of the gate plate when the gate valve is opened. When the valve needs to be opened, the gate plate slides upward along the guide rails under the action of the opening and closing mechanism, thereby forming a medium passage; when the valve needs to be shut off, the gate plate slides downward along the guide rails under the action of the opening and closing mechanism and its own weight, thereby truncating the medium channel. The gate valve is mainly used to connect or cut off the medium in the main body flow channel and is generally not used to adjust the medium flow rate.

[0003] The gate valve has a large structural strength, and because of its heavy structure, it can resist the erosion of the medium in the pipelines in the above technical fields for a long time, including but not limited to acid corrosion or solid medium erosion. However, the gate valve is not without disadvantages. For example, when opening the valve, the gate plate requires sufficient staying space, resulting in a relatively high height of the entire gate valve, which affects the on-site pipeline layout. In addition, for a gate valve with a gate plate moving distance greater than 2 meters, it is difficult to use a cylinder / hydraulic rod or an electric lead screw as the opening and closing mechanism. Usually, it is necessary to rely on the self-weight of the gate plate to achieve the lowering of the gate plate and thus the shut-off of the valve, resulting in that large gate valves can only be used on horizontal pipelines.

[0004] There is an urgent need to provide a valve that can replace the gate valve and be applied to the above technical fields with better adaptability. Summary of the Invention

[0005] The purpose of the present invention is to provide a wound flexible sealing valve to at least partially overcome the deficiencies in the prior art.

[0006] According to one aspect of the present invention, there is provided a wound flexible sealing valve for installation in a pipeline to control the flow and cut-off of a fluid medium in the pipeline, which includes:

[0007] A support frame having a valve hole formed in the center and side walls surrounding the valve hole, the side walls including a first side wall and a second side wall opposite to each other, and frame channels being formed on the first side wall and the second side wall;

[0008] A winding cylinder including a first winding cylinder and a second winding cylinder respectively installed outside the first side wall and the second side wall, and at least one of the first winding cylinder and the second winding cylinder being an active winding cylinder;

[0009] A strip-shaped flexible valve plate that passes through the frame channel and is wound around the first winding cylinder and the second winding cylinder; and

[0010] A drive mechanism for driving the winding cylinder to rotate to control the movement and positioning of the strip-shaped flexible valve plate relative to the valve hole,

[0011] wherein the strip-shaped flexible valve plate is formed with at least two closed surfaces and at least one flow surface arranged along its length direction. When the closed surface is centered with the valve hole, it can completely cover and close the valve hole, and the flow surface includes flow holes to allow fluid medium to flow through.

[0012] Preferably, the support frame further includes a valve plate support member that extends from the inner side of the side wall adjacent to the strip-shaped flexible valve plate for supporting the strip-shaped flexible valve plate when the strip-shaped flexible valve plate deforms under the pressure of the fluid medium.

[0013] In some embodiments, the valve plate support member may include a valve plate support rod disposed between two opposite side walls, and at least one end of the valve plate support rod is axially movably connected to the side wall. As an alternative or supplement, the valve plate support member may include a valve plate support belt that is elastic and has both ends fixed to the side wall.

[0014] Preferably, the flow surface further includes at least one reinforcing rib formed between the flow holes and extending along the length direction of the strip-shaped flexible valve plate.

[0015] In some embodiments, the valve plate support rod extends in a direction intersecting the reinforcing rib.

[0016] Preferably, the at least two closed surfaces include a first closed surface and a second closed surface arranged on both sides of a flow surface.

[0017] In some embodiments, the winding cylinder further includes a third winding cylinder disposed outside the first side wall. The first winding cylinder and the third winding cylinder are active winding cylinders that wind the two ends of the strip-shaped flexible valve plate respectively. In such an embodiment, preferably, the at least one flow surface includes at least a pair of adjacent flow surfaces, and the at least two closed surfaces include closed surfaces respectively arranged on both sides of a pair of adjacent flow surfaces. Preferably, the at least two closed surfaces include a pair of adjacent first closed surfaces and a pair of adjacent second closed surfaces respectively arranged on both sides of a pair of adjacent flow surfaces.

[0018] Preferably, a plurality of positioning structures are formed on the side edges of the strip-shaped flexible valve plate extending along its length direction, and the winding type flexible sealing valve further includes a positioning detection mechanism, which detects the positioning structures and outputs positioning information for determining the position of the strip-shaped flexible valve plate relative to the valve hole.

[0019] Advantageously, the positioning structure may include at least one of a shape mark, a pattern mark, and a magnetic mark; and the positioning detection mechanism may include at least one of a distance sensor, a pressure sensor, an image sensor, and a magnetic induction sensor.

[0020] In some embodiments, the positioning structure includes a positioning groove or a positioning protrusion, and the positioning detection mechanism includes an elastic contact biased toward and abutting against the side edge of the strip-shaped flexible valve plate. When the strip-shaped flexible valve plate moves, the positioning structure causes a change in the telescopic state of the elastic contact, thereby outputting the positioning information.

[0021] Preferably, a first sealing structure is provided on the support frame. The first sealing structure includes a sealing groove formed on the side wall and surrounding the valve hole, and a first soft sealing material installed in the sealing groove. The first soft sealing material is pressed and fitted on the strip-shaped flexible valve plate passing through the sealing groove from both sides.

[0022] In some embodiments, the first sealing structure is a static sealing structure.

[0023] In other embodiments, the first sealing structure includes a dynamic sealing box provided on one side of the strip-shaped flexible valve plate, the first soft sealing material filled in the dynamic sealing box, and an airbag provided on one side of the dynamic sealing box for driving the first soft sealing material to squeeze the strip-shaped flexible valve plate. On the one side of the strip-shaped flexible valve plate, the first soft sealing material can dynamically achieve a pressing fit with the strip-shaped flexible valve plate under the action of the airbag, and on the other side of the strip-shaped flexible valve plate, the first soft sealing material statically maintains a pressing fit with the strip-shaped flexible valve plate.

[0024] Preferably, a second sealing structure is further provided on the support frame. The second sealing structure includes a stuffing box and a sealing gland provided on the outer sides of the first side wall and the second side wall, and a second soft sealing material filled in the space limited by the stuffing box and the sealing gland. The sealing gland includes a plurality of independent pressing plates arranged along the width direction of the strip-shaped flexible valve plate.

[0025] Preferably, the strip-shaped flexible valve plate is made of a metal sheet and has a thickness of 0.5-3 mm, and an anti-corrosion coating is formed on at least one side of the metal sheet.

[0026] Preferably, the winding cylinder includes two active winding cylinders, and the driving mechanism includes a first motor and a second motor, which are respectively used to drive the rotation of the two active winding cylinders in the winding cylinder.

[0027] According to another aspect of the present invention, there is also provided a method for controlling the winding flexible sealing valve as described above. The method includes an operation of changing the position of the strip-shaped flexible valve plate relative to the valve hole to switch the sealing valve between an open state and a closed state, and the operation of changing the position of the strip-shaped flexible valve plate relative to the valve hole to switch the sealing valve between an open state and a closed state includes:

[0028] Rotating the first motor by an angle to relieve the tension of the strip-shaped flexible valve plate;

[0029] Synchronously rotating the first motor and the second motor to move the strip-shaped flexible valve plate; and

[0030] After stopping the synchronous rotation of the first motor and the second motor, rotating the first motor or the second motor by an angle to tension the strip-shaped flexible valve plate.

[0031] Preferably, the method further includes receiving positioning information and determining the position of the strip-shaped flexible valve plate relative to the valve hole according to the positioning information.

[0032] In the winding flexible sealing valve according to the embodiment of the present invention, the thinking limitation of using a heavy gate plate (i.e., valve plate) in a large pipeline in the related technical field is broken through. It is proposed to use a strip-shaped flexible valve plate, and a winding drive is provided for the strip-shaped flexible valve plate through a winding cylinder and a driving mechanism. In this way, on the one hand, the accommodation space of the valve plate is reduced by winding at both ends of the strip-shaped flexible valve plate, and on the other hand, a tension force is provided for the valve plate by winding at both ends of the strip-shaped flexible valve plate, so that a closed surface sufficient to cut off the medium in the pipeline can be provided when the valve plate itself is flexible.

[0033] Furthermore, by using a strip-shaped flexible valve plate including more than two closed surfaces, different closed surfaces can be alternately used to extend the service life of each closed surface, and / or the use of the sealing valve can be continued without replacing parts of the sealing valve when one of the closed surfaces is damaged, which better adapts to the application in a pipeline where the flowing medium is corrosive. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Other features, objects, and advantages of the present invention will become more apparent by reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0035] Figure 1 A perspective view of an example of a winding flexible sealing valve according to Embodiment 1 of the present invention;

[0036] Figure 2 is Figure 1 a cross-sectional view of the winding type flexible seal valve shown;

[0037] Figure 3 is Figure 1 a perspective view of a partial structure of the winding type flexible seal valve shown;

[0038] Figure 4 Schematically shows Example 1 of the strip-shaped flexible valve plate that can be used for the winding type flexible seal valve according to Embodiment 1 of the present invention;

[0039] Figure 5 Schematically shows Example 2 and Example 3 of the strip-shaped flexible valve plate that can be used for the winding type flexible seal valve according to Embodiment 1 of the present invention;

[0040] Figure 6 Schematically shows Example 4 and Example 5 of the strip-shaped flexible valve plate that can be used for the winding type flexible seal valve according to Embodiment 1 of the present invention;

[0041] Figure 7 is a perspective view of an example of the winding type flexible seal valve according to Embodiment 2 of the present invention;

[0042] Figure 8 is Figure 7 a cross-sectional view of the winding type flexible seal valve shown;

[0043] Figure 9 Schematically shows different examples of the strip-shaped flexible valve plate that can be used for the winding type flexible seal valve according to the embodiments of the present invention;

[0044] Figure 10 Schematically shows an example of the valve plate support member of the winding type flexible seal valve according to the embodiments of the present invention;

[0045] Figure 11 is a perspective view of an example of the winding type flexible seal valve applying the valve plate support member according to the embodiments of the present invention;

[0046] Figure 12 is a partially cut-away perspective view of the winding type flexible seal valve according to the embodiments of the present invention;

[0047] Figure 13 is a partial cross-sectional view of the winding type flexible seal valve according to the embodiments of the present invention, showing an example of the sealing structure;

[0048] Figure 14 is a partial cross-sectional view of the winding type flexible seal valve according to the embodiments of the present invention, showing another example of the sealing structure;

[0049] Figure 15 Schematically shows a second sealing structure with a split sealing gland;

[0050] Figure 16 Schematically shows different examples of mechanisms for determining the positioning information of a strip-shaped flexible valve plate relative to a valve hole. Detailed implementation manners

[0051] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than limiting the invention. For the convenience of description, only the parts related to the invention are shown in the drawings. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0052] The wound flexible seal valve according to an embodiment of the present invention is used to be installed in a pipeline to control the flow and cut-off of a fluid medium in the pipeline. First, refer to Figures 1 to 6 Describe the wound flexible seal valve 100 according to Embodiment 1 of the present invention.

[0053] Figure 1 Is a perspective view of an example of the wound flexible seal valve 100, Figure 2 Is a cross-sectional view of the wound flexible seal valve 100, Figure 3 Is a perspective view of a partial structure of the wound flexible seal valve 100. As Figures 1 to 3 Shown, the wound flexible seal valve 100 includes a support frame 10, a winding cylinder 20, a strip-shaped flexible valve plate 30 (see Figure 2 ) and a driving mechanism 40.

[0054] Specifically, as Figure 1 Shown, the support frame 10 has a valve hole 11 formed in the center and a side wall 12 surrounding the valve hole 11. In the example shown in the drawings, the support frame 10 has a rectangular shape and includes four side walls; however, this is not restrictive. According to an embodiment of the present invention, as Figure 1 Shown, the side wall 12 at least includes a first side wall 12a and a second side wall 12b that are opposite to each other, and frame channels 13 are formed on the first side wall 12a and the second side wall 12b. In the present application, the first side wall and the second side wall refer to the side walls that are opposite to each other. In the case where the support frame 10 has a circular shape, for example, the first side wall and the second side wall can be respectively composed of all or part of two opposite semi-circular side walls.

[0055] As Figure 2 And Figure 3 Shown, the winding cylinder 20 includes a first winding cylinder 21 and a second winding cylinder 22 that are respectively installed outside the first side wall 12a and the second side wall 12b. In Figure 1In the illustrated example, both the first winding cylinder 21 and the second winding cylinder 22 are active winding cylinders and are driven to rotate by a driving mechanism 40. To further ensure the centering of the strip-shaped flexible valve plate 30 with respect to the winding cylinder 20, flanges 20a may be provided at both ends of each winding cylinder 20 to prevent the strip-shaped flexible valve plate 30 from deflecting when rotating around the winding cylinder 20.

[0056] Preferably, the driving mechanism 40 includes a first motor 41 and a second motor 42 to drive the first winding cylinder 21 and the second winding cylinder 22 to rotate respectively. As an alternative or supplement, the driving mechanism 40 may also have other different configurations. For example, the driving mechanism 40 may include only one motor, and this motor is switchably connected to the first winding cylinder 21 and the second winding cylinder 22 through a transmission mechanism to drive the first winding cylinder 21 and the second winding cylinder 22 respectively at different times. Also for example, the driving mechanism 40 may include a manual driving structure, such as a handwheel.

[0057] For the setting of the strip-shaped flexible valve plate 30, reference may be made to Figure 2 . As Figure 2 shown, the strip-shaped flexible valve plate 30 passes through the frame channels 13 formed in the first side wall 12a and the second side wall 12b of the support frame 10, and its two ends are respectively wound around the first winding cylinder 21 and the second winding cylinder 22. As will be introduced with reference to Figures 4 to 6 below, according to an embodiment of the present invention, the strip-shaped flexible valve plate 30 is formed with at least one closed surface 31 and at least one flow surface 32 arranged along its length direction. When the closed surface 31 is centered with the valve hole 11, it can completely cover and close the valve hole 11, thereby shutting off the sealing valve; while the flow surface 32 includes flow holes to allow the fluid medium to flow through, so when the flow surface is aligned with the valve hole 11, the sealing valve is opened. Figure 1 and Figure 3 show the state where the flow surface 32 of the strip-shaped flexible valve plate 30 is aligned with the valve hole 11 to open the sealing valve. Thus, by driving the rotation of the winding cylinder 20 by the driving mechanism 40, the movement and positioning of the strip-shaped flexible valve plate 30 relative to the valve hole 11 can be controlled, and thus the opening and shutting off of the sealing valve 100 can be controlled.

[0058] In the winding type flexible sealing valve according to an embodiment of the present invention, since both ends of the strip-shaped flexible valve plate 30 are wound around the winding cylinder 20, the entire sealing valve does not occupy a large space in the direction perpendicular to the pipeline to which the sealing valve is applied, and has excellent adaptability to the equipment space. At the same time, by driving the rotation of the winding cylinder 20 by the driving mechanism 40 to move the valve plate 30, it does not rely on the gravity of the valve plate itself. Therefore, the winding type flexible sealing valve according to an embodiment of the present invention can be applied to pipelines with various orientations, and the adaptability is further improved.

[0059] Traditionally, the gate valves applied to large pipelines in fields such as petrochemical, water conservancy, metallurgy, and electric power usually have a very heavy structure because these pipelines are not only large in size, but also the media transported in them often have relatively high pressures, and in some cases, there are also situations such as high temperature, acid corrosion, or solid particle erosion. And the heavy gate structure is beneficial to resist pressure, thermal expansion and contraction, acid corrosion, or erosion. However, the heavy gate not only occupies a large space in the direction perpendicular to the pipeline, but also makes its movement extremely clumsy.

[0060] The winding type flexible sealing valve according to the embodiment of the present invention breaks through the thinking limitation of using a heavy gate (i.e., valve plate) in the pipelines in the above technical field, and proposes to use a strip-shaped flexible valve plate, and further provides a winding type drive for the strip-shaped flexible valve plate through a winding cylinder and a driving mechanism. In this way, on the one hand, the accommodation space of the valve plate is reduced by winding at both ends of the strip-shaped flexible valve plate, and on the other hand, a tension force is provided for the valve plate by winding at both ends of the strip-shaped flexible valve plate, so that a sealing surface sufficient to cut off the medium in the pipeline can be provided when the valve plate itself is flexible. Moreover, the winding type drive has great flexibility in positioning the strip-shaped flexible valve plate 30 relative to the valve hole 11 and can well cope with thermal expansion and contraction.

[0061] Considering the possible erosion of the valve plate by the medium, including acid corrosion or solid particle erosion, preferably, the strip-shaped flexible valve plate 30 includes more than two sealing surfaces 31. In this way, different sealing surfaces can be used alternately to extend the service life of each sealing surface; or, when one of the sealing surfaces 31 is severely eroded, another sealing surface 31 can be selected as an alternative, so as to continue the use of the sealing valve without replacing parts of the sealing valve. It should be understood that the present invention does not limit the number of flow surfaces and sealing surfaces on the strip-shaped flexible valve plate, and multiple (for example, at least two flow surfaces and / or at least two sealing surfaces) can be set as needed. Since winding itself greatly reduces the space required for the valve plate to occupy in the direction perpendicular to the pipeline, even if the strip-shaped flexible valve plate 30 includes more flow surfaces and sealing surfaces, it still maintains a great technical advantage in terms of adaptability to the installation space.

[0062] In the winding type flexible sealing valve according to different embodiments of the present invention, in order to ensure a good rolling effect of the strip-shaped flexible valve plate, the material and thickness of the valve plate can be optimized. For example, when the strip-shaped flexible valve plate is made of a metal plate (such as stainless steel 304, 316), the thickness of the valve plate is preferably 0.5 - 3 mm. Preferably, an anti-corrosion coating is formed on at least one side of the metal plate of the strip-shaped flexible valve plate.

[0063] The strip-shaped flexible valve plate can also be made of corrosion-resistant non-metallic materials such as fluororubber plates or polytetrafluoroethylene plates. In this case, the thickness of the valve plate is preferably 5-8 mm to provide appropriate structural strength and good rolling effect. The wound flexible seal valve with such a non-metallic valve plate is particularly beneficial for applications in gas medium environments with low temperature, low pressure but strong corrosiveness.

[0064] The following will refer to Figures 4 to 6 introduce several examples of the strip-shaped flexible valve plate 30 that can be used in accordance with Embodiment 1 of the present invention, namely strip-shaped flexible valve plates 30A, 30A', 30B, 30C, 30D.

[0065] Figure 4 In the illustrated example, the strip-shaped flexible valve plate 30A is formed with a closed surface 31 and a flow surface 32 arranged along its length direction (the horizontal direction in the drawing), wherein the closed surface 31 has a sufficiently large size to completely cover and close the valve hole 11 when centered with the valve hole 11, and the flow surface 32 includes exemplary flow holes 32a, and the flow holes 32a include a plurality of flow holes arranged in an array.

[0066] Figure 4 It is shown that the flow holes 32a include four flow holes, thus presenting a "field" shape as a whole, however, this is not restrictive. The flow holes 32a composed of the flow holes arranged in an array can maintain the material continuity of the strip-shaped flexible valve plate 30A while providing a channel for medium flow. Large pipelines applied in fields such as petrochemical, water conservancy, metallurgy, and electric power usually have very large pressure in the medium. The flow holes arranged in an array in the flow holes 32a are beneficial to improving the structural strength of the strip-shaped flexible valve plate 30A and can better adapt to the application environment of large pipelines in the above technical fields.

[0067] Figure 4 In the illustrated example, reinforcing ribs 33 extending along the length direction of the strip-shaped flexible valve plate 30A are formed between the flow holes 32a, which particularly improves the tensile strength of the strip-shaped flexible valve plate along the winding direction.

[0068] Figure 5 and Figure 6 show the strip-shaped flexible valve plates 30A', 30B, 30C, 30D. As Figure 5 and Figure 6As shown, the strip-shaped flexible valve plates 30A', 30B, 30C, and 30D each include two closed surfaces 31, namely the first closed surface 31-1 and the second closed surface 31-2; and according to a preferred implementation, the first closed surface 31-1 and the second closed surface 31-2 are arranged on both sides of the flow surface 32. As discussed above, providing two closed surfaces is beneficial to extending the service life of the sealing valve, reducing maintenance work such as part replacement, and is particularly advantageous for application scenarios where there is medium erosion. In addition, arranging the two closed surfaces 31 on both sides of the flow surface 32 enables more flexible switching between using the flow surface and different closed surfaces, and does not additionally increase the driving operation of the driving mechanism on the winding cylinder when choosing different closed surfaces to achieve the shut-off of the sealing valve, which is convenient for operation and shortens the operation time.

[0069] Figure 5 and Figure 6 The main difference between the strip-shaped flexible valve plates 30A', 30B, 30C, and 30D shown is the different flow holes in the flow surface 32.

[0070] Figure 5 The flow hole 32a in the strip-shaped flexible valve plate 30A' shown in figure (a) in [reference] is the same as the flow hole 32a introduced above, and will not be elaborated here. Figure 4 introduced above, and will not be elaborated here.

[0071] Figure 5 In the strip-shaped flexible valve plate 30B shown in figure (b) in [reference], the flow surface 32 includes two flow holes 32b arranged side by side perpendicular to the length direction of the valve plate, so that it is generally in the shape of a Chinese character 'Ri'; a reinforcing rib 33 extending along the length direction of the valve plate is formed between the two flow holes 32b. Similarly, Figure 6 In the strip-shaped flexible valve plate 30C shown in figure (a) in [reference], the flow surface 32 includes three flow holes 32c arranged side by side perpendicular to the length direction of the valve plate, so that it is generally in the shape of a Chinese character 'Mu'; a reinforcing rib 33 extending along the length direction of the valve plate is formed between adjacent two flow holes 32c. Since the main forces borne by the valve plate are the pressure exerted by the medium perpendicular to the surface of the valve plate and the tension in the length direction of the valve plate, forming as many continuous parts of the material between the flow holes as possible into reinforcing ribs along the length direction of the valve plate will be beneficial to reducing the medium pressure and improving the tensile strength of the valve plate.

[0072] In the examples introduced above, several flow holes on the same flow surface 32 generally form a substantially rectangular medium flow opening, but this is not restrictive, and the flow surface 32 can also provide an opening in other shapes such as a circle, a hexagon, etc. For example, Figure 6 In the strip-shaped flexible valve plate 30D shown in figure (b) in [reference], a plurality of flow holes 32d generally form a circular opening. In addition, similarly, a reinforcing rib 33 can be formed between the flow holes 32d.

[0073] Next, refer to Figures 7 to 9 to introduce the wound flexible seal valve 200 according to the second embodiment of the present invention. Figure 7 FIG. 5 is a perspective view (with the drive mechanism omitted) of an example of the wound flexible seal valve 200. Figure 8 FIG. 6 is a cross-sectional view of the wound flexible seal valve 200, Figure 9 schematically showing different examples of the strip-shaped flexible valve plate that can be used for the wound flexible seal valve 200.

[0074] The wound flexible seal valve 200 according to the second embodiment of the present invention has substantially the same structure as the wound flexible seal valve 100 according to the first embodiment of the present invention, except that: in the seal valve 200, the winding cylinder 20 further includes a third winding cylinder 23 provided outside the first side wall 12a, and the first winding cylinder 21 and the third winding cylinder 23 are active winding cylinders, respectively winding both ends of the strip-shaped flexible valve plate 30. The second winding cylinder 22 winds the middle portion of the strip-shaped flexible valve plate 30 for tensioning the strip-shaped flexible valve plate 30 between the first winding cylinder 21 and the third winding cylinder 23.

[0075] In some implementation manners, the second winding cylinder 22 can be implemented as a driven winding cylinder. In another implementation manner, the second winding cylinder 22 can be implemented as an active winding cylinder, and its surface can be provided with, for example, a toothed transmission structure for cooperating with the transmission holes formed in the strip-shaped flexible valve plate 30 to assist in driving the movement of the strip-shaped flexible valve plate 30.

[0076] Preferably, the drive mechanism 40 (not shown in the figure) of the wound flexible seal valve 200 can include a first motor and a second motor for respectively driving the rotation of the first winding cylinder 21 and the third winding cylinder 23. Optionally, in the implementation manner where the second winding cylinder 22 is an active winding cylinder, the drive structure 40 can further include a third motor for driving the second winding cylinder 22. The drive mechanism 40 of the wound flexible seal valve 200 can also have other different settings. For example, the drive mechanism 40 can include only one motor, and the motor is switchably connected to the first winding cylinder 21 and the third winding cylinder 23 through a transmission mechanism to drive the first winding cylinder 21 and the third winding cylinder 23 respectively at different times. Also, for example, the drive mechanism 40 can include a manual drive structure, such as a handwheel.

[0077] In the winding type flexible sealing valve 200 according to the second embodiment of the present invention, the portions of the strip-shaped flexible valve plate 30 between the first winding cylinder 21 and the second winding cylinder 22 and between the second winding cylinder 22 and the third winding cylinder 23 respectively straddle the valve hole; correspondingly, the strip-shaped flexible valve plate includes at least a pair of adjacent flow surfaces, and preferably includes closing surfaces respectively arranged on both sides of a pair of adjacent flow surfaces. As already discussed above, the closing surfaces respectively arranged on both sides of the flow surfaces enable more flexible switching between the use of the flow surfaces and different closing surfaces, and when different closing surfaces are selected to achieve the shut-off of the sealing valve, the driving operation of the driving mechanism on the winding cylinder will not be additionally increased.

[0078] By way of example only and not limitation, Figure 9 different examples of the strip-shaped flexible valve plate that can be used for the sealing valve 200 are shown.

[0079] Figure 9 In the example shown in figure (a), the strip-shaped flexible valve plate 30E includes a pair of adjacent flow surfaces 32 and a first closing surface 31-1 and a second closing surface 31-2 respectively arranged on both sides of this pair of flow surfaces 32. The pair of adjacent flow surfaces 32 can respectively align with the valve hole 11 between the first winding cylinder 21 and the second winding cylinder 22 and between the second winding cylinder 22 and the third winding cylinder 23, so as to provide a medium flow channel. When any one of the first closing surface 31-1 and the second closing surface 31-2 on both sides is positioned to align with the valve hole 11, the cut-off of the medium can be achieved.

[0080] Figure 9 In the example shown in figure (b), the strip-shaped flexible valve plate 30F includes a pair of adjacent flow surfaces 32 and a pair of adjacent first closing surfaces 31-1, 31-1 and a pair of second closing surfaces 31-2, 31-2 respectively arranged on both sides of this pair of adjacent flow surfaces 32. In this example, when any one of the pair of adjacent first closing surfaces 31-1, 31-1 and the pair of adjacent second closing surfaces 31-2, 31-2 is positioned to align with the valve hole 11, the cut-off of the medium can be achieved. In particular, when the pair of adjacent first closing surfaces 31-1, 31-1 or the pair of adjacent second closing surfaces 31-2, 31-2 are positioned to align with the valve hole 11 between the first winding cylinder 21 and the second winding cylinder 22 and between the second winding cylinder 22 and the third winding cylinder 23 respectively, they can jointly provide the cut-off effect on the medium. This is beneficial to providing better sealing and cut-off functions, and is especially suitable for application occasions where the pressure difference between the media on both sides is very large or the sealing requirement between the two sides is high in the shut-off state of the sealing valve.

[0081] In the coiled flexible seal valve 200 according to the second embodiment, other structures of the strip-shaped flexible valve plate may be the same as or similar to those of the strip-shaped flexible valve plate in the seal valve 100 according to the first embodiment. Details thereof will not be elaborated herein.

[0082] Next, with reference to Figures 10 to 16 Some preferred structural features of the seal valve applicable to different embodiments of the present invention will be introduced.

[0083] According to a preferred embodiment of the present invention, as Figure 10 shown, the support frame 10 may further include a valve plate support 14. Specifically, the valve plate support 14 is arranged to protrude from the inner side of the side wall adjacent to the strip-shaped flexible valve plate, and is used to support the strip-shaped flexible valve plate 30 when the strip-shaped flexible valve plate 30 deforms under the pressure of the fluid medium. Since there is medium pressure in the pipeline and the strip-shaped flexible valve plate 30 is relatively thin, the pressure difference formed by the media on both sides of the valve plate can easily cause the strip-shaped flexible valve plate 30 to bulge (especially when the seal valve is closed), which has a destructive effect on the valve plate. The valve plate support 14 can help improve or avoid the problem of valve plate bulging caused by the medium pressure difference. Preferably, the valve plate support 14 is arranged on the side of the strip-shaped flexible valve plate 30 where the pressure is lower when the coiled flexible seal valve is closed. In addition, this also causes the position of the flexible valve plate 30 on the winding cylinder 20 to move, which may damage the accurate positioning of the strip-shaped flexible valve plate 30 relative to the valve hole 11. Figure 11 One of the support states of the valve plate support 14 for the strip-shaped flexible valve plate 30 is shown in a three-dimensional view, in which the flow surface 32 of the strip-shaped flexible valve plate 30 is aligned with the valve hole 11, and at this time the valve plate support 14 abuts against and supports the reinforcing rib 33. Relatively speaking, when the closing surface 31 of the strip-shaped flexible valve plate 30 is aligned with the valve hole 11, since the media on both sides of the seal valve are cut off, the pressure exerted by the upstream medium on the closing surface 31 will increase. In this case, the valve plate support 14 abuts against and supports the closing surface 31, which has a more prominent effect of protecting the valve plate.

[0084] Preferably, the valve plate support 14 has an elongated shape. The valve plate support rod 14 may extend in a direction intersecting the reinforcing rib 33, but the present invention is not limited thereto. Preferably, the valve rod support 14 is arranged along the direction with a smaller span dimension of the valve hole 11, which allows the use of a valve rod support 14 with a smaller length and is beneficial to improving the structural strength of the support.

[0085] Figure 10In the illustrated example, the valve plate support member 14 includes a valve plate support rod disposed between two opposite side walls 12. One end 14a of the valve plate support rod 14 is fixed to the third side wall 12c on one side, and the other end 14b is axially movably connected to the fourth side wall 12d on the opposite side. For example, the end 14b of the valve plate support rod 14 can be axially movably connected by being sleeved with a hollow tube 14d or a short pile (not shown) fixed to the fourth side wall 12d. In other examples not shown, both ends of the valve plate support rod 14 can be axially movably connected to the side wall 12. The axially movable connection helps to avoid damage to the valve plate support member 14 or the support frame 10 caused by thermal expansion and contraction.

[0086] Preferably, as Figure 10 shown, the valve plate support rod 14 can include an intermediate support section 14c, and the intermediate support section 14c is biased towards the strip-shaped flexible valve plate 30 relative to the two ends 14a, 14b, so as to better contact and support the valve plate. At the same time, such a setting allows the intermediate support section 14c to be as close as possible to the strip-shaped flexible valve plate 30, while the two ends 14a, 14b can be away from the fluid passage 13, thus facilitating the installation of the ends.

[0087] As an alternative or supplement, the valve plate support member 14 can include a valve plate support belt (not shown in the figure). The valve plate support belt can be elastic and both ends are fixed to the side wall. When the strip-shaped flexible valve plate 30 deforms under the pressure of the fluid medium, the valve plate support belt can provide support for it, and at the same time, because it has a certain elasticity, it is not damaged by thermal expansion and contraction.

[0088] Figure 12 It is a partial cross-sectional perspective view of a wound flexible seal valve according to an embodiment of the present invention. As Figure 12 shown, and referring back to Figure 2 and Figure 8 it can be seen that the wound flexible seal valve according to an embodiment of the present invention can further include two sets (i.e., two pairs) of positioning rollers 50 disposed between the support frame 10 and the winding cylinder 20. Each set of positioning rollers 50 includes a pair of rollers 51, 52 that squeeze the strip-shaped flexible valve plate 30 from both sides relative to each other (see Figure 12 ). In the Figure 2 shown wound flexible seal valve 100, the two sets of positioning rollers 50 are respectively disposed between the first side wall 12a and the second side wall 12b of the support frame 10 and the first winding cylinder 21 and the second winding cylinder 22 that serve as the active winding cylinders. In the Figure 8 shown wound flexible seal valve 200, the two sets of positioning rollers 50 can be respectively disposed between the first side wall 12a of the support frame 10 and the first winding cylinder 21 and the third winding cylinder 23 that serve as the active winding cylinders. Although Figure 8Although not shown in the figure, according to requirements, a positioning roller can also be provided between the second side wall 12b and the second winding cylinder 22. The positioning roller 50 flattens and centers and positions the strip-shaped flexible valve plate 30 unrolled from the winding cylinder, preventing the strip-shaped flexible valve plate 30 from deforming or the plane of the strip-shaped flexible valve plate 30 from being misaligned with the frame channel 13, which may affect the sealing effect.

[0089] Figure 12 The sealing structure in the wound flexible seal valve is also shown. Figure 13 It is a partial cross-sectional view of the wound flexible seal valve according to an embodiment of the present invention, showing the Figure 12 corresponding sealing structure shown. Figure 14 It is a partial cross-sectional view of the wound flexible seal valve according to an embodiment of the present invention, showing another example of the sealing structure.

[0090] With reference to Figures 12 to 14 , a first sealing structure 60 is provided on the support frame 10. The first sealing structure 60 includes a sealing groove 61 formed on the side wall 12 and surrounding the valve hole 11 (see Figure 1 , Figure 2 and Figure 7 ) and a first soft sealing material 62 installed in the sealing groove 61. The first soft sealing material 62 presses and fits on the strip-shaped flexible valve plate 30 passing through the sealing groove 61 from both sides.

[0091] In Figure 12 and Figure 13 In the shown example, the first sealing structure 60 is a static sealing structure. Among them, the first soft sealing materials 62 on both sides of the strip-shaped flexible valve plate 30 statically maintain the pressing and fitting relationship with the flexible valve plate 30, thereby maintaining the sealing of the flexible valve plate 30. Preferably, as Figure 12 and Figure 13 shown, the first sealing structure 60 can include two sets of static sealing structures symmetrically arranged on both sides of the strip-shaped flexible valve plate 30. Each set of static sealing structures includes a static sealing box 63 and a first soft sealing material 62 located inside the static sealing box 63. The static sealing box 63 is generally rectangular (consistent with the shape of the valve hole 11), and its cross-section is U-shaped, with the first soft sealing material 62 installed inside to keep the first soft sealing material 62 in a pressed state with the side surface of the valve plate 30, ensuring the sealing effect.

[0092] In Figure 14 In the shown example, on one side of the strip-shaped flexible valve plate 30, the first sealing structure 60 includes a dynamic sealing structure. Specifically, the first sealing structure 60 includes a dynamic sealing box 64 provided on one side of the strip-shaped flexible valve plate 30, a first soft sealing material 62 filled in the dynamic sealing box 64, and an airbag 65 provided on one side of the dynamic sealing box 64 for driving the first soft sealing material 62 to extrude the strip-shaped flexible valve plate 30. As Figure 14As shown in Figure (a), when the airbag 65 is inflated and expanded, it squeezes the first soft sealing material 62 to press it tightly against the strip-shaped flexible valve plate 30 to achieve a sealing fit; as shown in Figure (b), when the airbag 65 deflates and contracts, it allows the first soft sealing material 62 to release the sealing fit with the strip-shaped flexible valve plate 30. In this way, the first soft sealing material 62 can dynamically achieve a pressing fit with the strip-shaped flexible valve plate 30 under the action of the airbag 65. Preferably, a dynamic sealing chamber 66 with a U-shaped cross-section is arranged outside the dynamic sealing box 64, and the dynamic sealing box 64 can move in the dynamic sealing chamber 66 in a direction perpendicular to the surface of the valve plate; the airbag 65 can be arranged between the U-shaped bottom surface of the dynamic sealing box 64 and the U-shaped bottom surface of the dynamic sealing chamber 66. The airbag 65 can be an integral airbag for squeezing the entire dynamic sealing box 64 (the dynamic sealing box 64 has a contour shape corresponding to the valve hole 11), or can include a plurality of airbags distributed along the dynamic sealing box 64. For example, the airbag 65 can include four corresponding airbags located at the four corners of the rectangular dynamic sealing box 64.

[0093] Figure 14 In the example shown, on the other side of the strip-shaped flexible valve plate 30, the first sealing structure 60 has the same Figure 12 and Figure 13 static sealing structure as shown, in which the first soft sealing material 62 statically maintains a pressing fit with the strip-shaped flexible valve plate 30. It should be understood that the first sealing structure of the wound flexible sealing valve according to the embodiments of the present invention can also adopt a dynamic sealing structure on both sides of the flexible valve plate, which will not be elaborated here. In addition, the structure for realizing dynamic sealing is not limited to the above airbag-based structure. For example, a cylinder or the like can also be used as a driving device to realize the extrusion of the first soft sealing material.

[0094] In order to ensure the sealing performance, the soft sealing material in the static sealing structure usually maintains a certain pre-tightening force, and this pre-tightening force will cause wear to the sealing surfaces on both sides of the valve plate (the surfaces in contact with each other between the valve plate and the soft sealing material) during the movement of the strip-shaped flexible valve plate 30. The dynamic sealing function provided by the first sealing structure 60 allows reducing the wear of the sealing surfaces during the movement of the strip-shaped flexible valve plate 30, thereby protecting the valve plate. This dynamic sealing is also beneficial to reducing the movement resistance of the flexible valve plate 30, making the valve operation more convenient and rapid. In addition, only arranging the dynamic sealing structure on one side of the valve plate 30 is beneficial to simplifying the equipment structure and reducing the cost. Preferably, the dynamic sealing structure is arranged on the side with lower medium pressure on both sides of the sealing valve, which is beneficial to reducing the medium leakage in the unsealed state.

[0095] In the winding flexible seal valve according to an embodiment of the present invention, the dynamic seal structure in the first seal structure is controlled such that before starting to move the strip-shaped flexible valve plate 30, the dynamic seal structure releases the seal on the valve plate 30 to move the valve plate 30; and after the strip-shaped flexible valve plate 30 moves to the target position, the dynamic seal structure restores the seal on the valve plate 30 to avoid medium leakage.

[0096] Figure 12 , Figure 13 and Figure 14 also shows a second seal structure 70 for the winding flexible seal valve according to an embodiment of the present invention. As Figures 12 to 14 shown, the second seal structure 70 is provided on the support frame 10, and includes a stuffing box 71 and a seal gland 72 provided on the outer sides of the first side wall 12a and the second side wall 12b, and a second soft seal material 73 filled in the space limited by the stuffing box 71 and the seal gland 72. The seal gland 72 can be fixed to the stuffing box 71 through a threaded connector, for example, so as to squeeze the second soft seal material 73 filled in the internal space, and make it tightly fit on both sides of the strip-shaped flexible valve plate 30.

[0097] By combining the first seal structure 60 and the second seal structure 70, the winding flexible seal valve according to an embodiment of the present invention can effectively avoid medium leakage to the outside of the pipeline. Specifically, even in the state where the dynamic seal in the first seal structure is released, or in the case where the static seal structure in the first seal structure fails (for example, due to wear), due to the presence of the second seal structure, there will be no situation of medium leakage to the outside.

[0098] Figure 15 Schematically shows a preferred example of the second seal structure 70, in which the seal gland 72 has a split structure. Specifically, Figure 15 figure (a) in shows the state where the seal gland 72 in the second seal structure 70 is removed to expose the stuffing box 71, and figure (b) shows the state after the seal gland 72 is fixed to the stuffing box 71. As Figure 15 shown, the seal gland 72 can include a plurality of independent pressing plates 72a arranged along the width direction of the strip-shaped flexible valve plate 30 (the up-and-down direction in the figure).

[0099] The split seal gland can be flexibly set according to the width of the strip-shaped flexible valve plate to be sealed, so that the winding flexible seal valve according to an embodiment of the present invention can well meet the needs of large pipeline seals in technical fields such as petrochemical, water conservancy, metallurgy, and electric power. The split seal gland can reduce the requirement for processing accuracy, and allows to adapt to the needs of different seal widths by providing standard specifications of pressing plates, which is beneficial to reducing the equipment cost.

[0100] Return to referenceFigure 1 and Figure 2 Moreover, according to Embodiment 1 of the present invention, the wound flexible seal valve 100 may further include a wound cylinder box 80 covering the outside of the support frame 10 for enclosing structures such as the wound cylinder 2 and the positioning roller 50 therein. Although not shown in the figure, the wound flexible seal valve 200 according to Embodiment 2 of the present invention may also include such a wound cylinder box. By providing the wound cylinder box 80, on the one hand, it can support the wound cylinder and the positioning roller, and on the other hand, it can further prevent the leakage of the medium to the outside of the pipeline and the seal valve.

[0101] In addition, according to a preferred embodiment of the present invention, as Figure 16 shown, a positioning structure 34 may be provided on the side edge of the strip-shaped flexible valve plate 30 along its length direction (the direction indicated by the double-headed arrow in the figure), and the wound flexible seal valve may further include a positioning detection mechanism 90 for detecting the positioning structure 34 to output positioning information. The positioning information refers to the information for determining the position of the strip-shaped flexible valve plate 30 relative to the valve hole 11.

[0102] Returning to Figure 5 , Figure 5 in the figure (a) of Figure 5 , a plurality of positioning structures 34 are formed on the side edge of the strip-shaped flexible valve plate 30A' extending along its length direction. For clarity, Figure 5 only two positioning structures provided on one side edge of the valve plate are marked. It should be understood that positioning structures may be provided on both side edges of the strip-shaped flexible valve plate 30 along its length direction, and the number of positioning structures may be determined according to the number of closed surfaces and flow surfaces to be positioned. Advantageously, the positioning structures 34 may be provided in pairs on both side edges of the valve plate 30. In some cases, the paired positioning structures 34 may be aligned with each other along the length direction of the valve plate. Such redundant setting can help to more reliably detect the positioning information. In other cases, the paired positioning structures 34 may be offset from each other by a predetermined distance along the length direction of the valve plate to allow obtaining the movement direction and / or movement speed of the valve plate based on the positioning information detected by different positioning structures 34, further improving the accuracy of valve operation.

[0103] Figure 16 Schematically shows different examples of the positioning structure and the positioning detection mechanism for determining the positioning information of the strip-shaped flexible valve plate relative to the valve hole.

[0104] In Figure 16 the example shown in the figure (a) of Figure 16 , the positioning structure 34 includes a positioning protrusion 34a, and the positioning detection mechanism 90 includes an elastic contact 91 biased towards and abutting against the side edge of the strip-shaped flexible valve plate 30. When the strip-shaped flexible valve plate 30 moves, the positioning protrusion 34a changes the telescopic state of the elastic contact 91, thereby outputting positioning information. Figure 16It is shown that the elastic contact 91 includes a spring and a spherical contact member connected to the end of the spring. However, the present invention is not limited to the elastic contact 91 having a specific structure. In Figure 16 In the example shown in FIG. (a), as an alternative or supplement, the positioning structure 34 may also include a positioning groove.

[0105] In Figure 16 In the example shown in FIG. (b), the positioning structure 34 includes a positioning groove 34b, and the positioning detection mechanism 90 includes a distance sensor 92. As the strip-shaped flexible valve plate 30 moves, when the positioning groove 34b on the side passes by the distance sensor 92, the distance sensor 92 detects a change in the distance from the valve plate side at the positioning groove 34b, thereby obtaining corresponding positioning information. In this example, as an alternative or supplement, the positioning structure 34 may also include a positioning protrusion.

[0106] Figure 16 What is shown is only exemplary and schematic. According to different embodiments of the present invention, the positioning structure 34 may include at least one of a shape mark, a pattern mark, and a magnetic mark; and the positioning detection mechanism 90 includes at least one of a distance sensor, a pressure sensor, an image sensor, and a magnetic induction sensor. For example, when the positioning structure 34 includes a shape mark, the positioning detection mechanism 90 may include a distance sensor, a pressure sensor, and an image sensor; when the positioning structure 34 includes a pattern mark, the positioning detection mechanism 90 may include an image sensor; when the positioning structure 34 includes a magnetic mark, the positioning detection mechanism 90 may include a magnetic induction sensor.

[0107] According to an embodiment of the present invention, there is also provided a method for controlling a wound flexible sealing valve in which two active winding drums are respectively driven to rotate by a first motor and a second motor. Such a wound flexible sealing valve is, for example, the wound flexible sealing valves 100 and 200 according to the embodiments of the present invention introduced above with reference to Figures 1 to 9 The control method according to an embodiment of the present invention includes an operation of changing the position of the strip-shaped flexible valve plate relative to the valve hole to switch the sealing valve between an open state and a closed state, and this operation further includes:

[0108] (1) Rotating the first motor by an angle to relieve the tension force of the strip-shaped flexible valve plate;

[0109] (2) Synchronously rotating the first motor and the second motor to move the strip-shaped flexible valve plate; and

[0110] (3) After stopping the synchronous rotation of the first motor and the second motor, rotating the first motor or the second motor by an angle to tension the strip-shaped flexible valve plate.

[0111] It should be understood that in the winding flexible sealing valve according to the embodiments of the present invention, since the first motor and the second motor have an equivalent structural relationship, the "first motor" in step (1) of the above control method is not essentially limited to a specific one of the two motors, but can be any one of them.

[0112] Preferably, the control method according to the embodiments of the present invention may further include receiving positioning information and determining the position of the strip-shaped flexible valve plate relative to the valve hole according to the positioning information.

[0113] For ease of understanding, the following describes an execution example of the control method according to the embodiments of the present invention with reference to the structure shown in the accompanying drawings. Taking Figure 2 the winding flexible sealing valve 100 shown in combination with Figure 5 and Figure 6 any one of the strip-shaped flexible valve plates 30A', 30B, 30C, 30D shown as an example, and assuming that the initial state of the sealing valve 100 is that the first closing surface 31-1 closes the valve hole 11, then:

[0114] When it is necessary to open the sealing valve 100, first, control the first motor 41 to rotate clockwise (taking the rotation direction in the Figure 2 shown perspective as a reference) by a small angle to relieve the tension of the strip-shaped flexible valve plate 30; then, control the first motor 41 and the second motor 42 to rotate counterclockwise synchronously to drive the first winding cylinder 21 and the second winding cylinder 22 to rotate, and move the strip-shaped flexible valve plate 30 towards the left; after moving a predetermined distance, or when receiving the positioning information and determining that the flow-through surface 32 of the strip-shaped flexible valve plate 30 is aligned with the valve hole 11 according to the positioning information, stop the rotation of the first motor 41 and the second motor 42; then, control the second motor 42 to rotate clockwise by a small angle to tension the strip-shaped flexible valve plate 30. At this time, the flow-through surface 32 is aligned with the valve hole 11, and the sealing valve 100 is opened.

[0115] When it is necessary to shut off the sealing valve 100, control the second motor 42 to rotate counterclockwise by a small angle to relieve the tension of the strip-shaped flexible valve plate 30; then, control the first motor 41 and the second motor 42 to rotate counterclockwise synchronously to drive the first winding cylinder 21 and the second winding cylinder 22 to rotate, and continue to move the strip-shaped flexible valve plate 30 towards the left; after moving a predetermined distance, or when receiving the positioning information and determining that the second closing surface 31-2 of the strip-shaped flexible valve plate 30 is aligned with the valve hole 11 according to the positioning information, stop the rotation of the first motor 41 and the second motor 42; subsequently, control the first motor 41 to rotate counterclockwise by a small angle to tension the strip-shaped flexible valve plate 30. At this time, the second closing surface 31-2 is aligned with the valve hole 11, and the sealing valve 100 is shut off.

[0116] When it is necessary to open the sealing valve 100 again, first, control the first motor 41 to rotate clockwise by a small angle to relieve the tension force of the strip-shaped flexible valve plate 30; then, control the first motor 41 and the second motor 42 to rotate synchronously clockwise to drive the first winding cylinder 21 and the second winding cylinder 22 to rotate, and move the strip-shaped flexible valve plate 30 towards the right; after moving a predetermined distance, or when the positioning information is received and it is determined according to the positioning information that the flow-through surface 32 of the strip-shaped flexible valve plate 30 is aligned with the valve hole 11, stop the rotation of the first motor 41 and the second motor 42; then, control the first motor 41 to rotate counterclockwise by a small angle to tension the strip-shaped flexible valve plate 30. At this time, the flow-through surface 32 is aligned with the valve hole 11, and the sealing valve 100 is opened.

[0117] When it is necessary to close the sealing valve 100 again, control the second motor 42 to rotate counterclockwise by a small angle to relieve the tension force of the strip-shaped flexible valve plate 30; then, control the first motor 41 and the second motor 42 to rotate synchronously clockwise to drive the first winding cylinder 21 and the second winding cylinder 22 to rotate, and continue to move the strip-shaped flexible valve plate 30 towards the right; after moving a predetermined distance, or when the positioning information is received and it is determined according to the positioning information that the first closing surface 31-1 of the strip-shaped flexible valve plate 30 is aligned with the valve hole 11, stop the rotation of the first motor 41 and the second motor 42; subsequently, control the second motor 42 to rotate clockwise by a small angle to tension the strip-shaped flexible valve plate 30. At this time, the first closing surface 31-1 is aligned with the valve hole 11, and the sealing valve 100 is closed.

[0118] It should be understood that the control method according to the embodiments of the present invention is applied in each of the above processes of closing or opening the sealing valve 100.

[0119] The above description is only a preferred embodiment of the present application and an explanation of the applied technical principle. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by the specific combination of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the technical solutions formed by mutually replacing the above features with the technical features (but not limited to) disclosed in the present application that have similar functions.

Claims

1. A winding type flexible sealing valve, used for installation in a pipeline to control the flow and cutoff of a fluid medium in the pipeline, comprising: A support frame having a valve hole formed in the center and side walls surrounding the valve hole, wherein the side walls include a first side wall and a second side wall opposite to each other, and frame channels are formed on the first side wall and the second side wall; A winding drum, comprising a first winding drum and a second winding drum respectively mounted on the outside of the first side wall and the second side wall, at least one of the first winding drum and the second winding drum being an active winding drum; A strip-shaped flexible valve plate passing through the frame channel and wound around the first winding drum and the second winding drum; as well as A driving mechanism, used for driving the winding drum to rotate, so as to control the movement and positioning of the strip-shaped flexible valve plate relative to the valve hole, The strip-shaped flexible valve plate is formed with at least two closed surfaces and at least one flow surface arranged along its length direction, wherein the closed surface can completely cover and close the valve hole when aligned with the valve hole, and the flow surface includes a flow hole to allow the fluid medium to flow therethrough.

2. The wrap-around flexible sealing valve according to claim 1, wherein: The support frame further includes a valve plate support member extending from the inner side of the side wall adjacent to the strip-shaped flexible valve plate for supporting the strip-shaped flexible valve plate when the strip-shaped flexible valve plate is deformed under the pressure of a fluid medium.

3. The wrap-around flexible sealing valve according to claim 2, wherein: The valve plate support member comprises a valve plate support rod disposed between two opposite side walls, at least one end of the valve plate support rod being axially movably connected to the side wall; or The valve plate support member comprises a valve plate support belt, the valve plate support belt is elastic, and two ends of the valve plate support belt are fixed on the side wall.

4. The wrap-around flexible sealing valve according to any one of claims 1 to 3, wherein: The flow surface further includes at least one reinforcing rib formed between the flow holes and extending along the length direction of the strip-shaped flexible valve plate.

5. The wrap-around flexible sealing valve according to claim 4, wherein: The valve plate supporting rod extends in a direction intersecting with the reinforcing rib.

6. The wrap-around flexible sealing valve according to claim 1, wherein: The at least two closing surfaces include a first closing surface and a second closing surface arranged on both sides of a flow surface.

7. The wrap-around flexible sealing valve according to claim 1, wherein: The winding drum further includes a third winding drum arranged outside the first side wall. The first winding drum and the third winding drum are active winding drums, which are respectively wound around two ends of the strip-shaped flexible valve plate.

8. The wrap-around flexible sealing valve according to claim 7, wherein: The at least one flow surface includes at least one pair of flow surfaces adjacent to each other, and the at least two closed surfaces include closed surfaces respectively arranged on both sides of the pair of flow surfaces adjacent to each other.

9. The wrap-around flexible sealing valve according to claim 8, wherein: The at least two closed surfaces include a pair of mutually adjacent first closed surfaces and a pair of mutually adjacent second closed surfaces respectively arranged on both sides of a pair of mutually adjacent flow surfaces.

10. The wrap-around flexible sealing valve according to any one of claims 1, 6 to 9, wherein: A plurality of positioning structures are formed on the side of the strip-shaped flexible valve plate extending along its length direction, and the wrapped flexible sealing valve also includes a positioning detection mechanism, which detects the positioning structure and outputs positioning information for determining the position of the strip-shaped flexible valve plate relative to the valve hole.

11. The wrap-around flexible sealing valve according to claim 10, wherein: The positioning structure includes at least one of a shape mark, a pattern mark, and a magnetic mark; and the positioning detection mechanism includes at least one of a distance sensor, a pressure sensor, an image sensor, and a magnetic induction sensor.

12. The wrap-around flexible sealing valve according to claim 11, wherein: The positioning structure includes a positioning groove or a positioning protrusion, and the positioning detection mechanism includes an elastic contact biased toward the side of the strip-shaped flexible valve plate and abutting against the side. When the strip-shaped flexible valve plate moves, the positioning structure changes the telescopic state of the elastic contact, thereby outputting the positioning information.

13. The wrap-around flexible sealing valve according to claim 1, wherein: A first sealing structure is provided on the support frame, and the first sealing structure includes a sealing groove formed on the side wall and surrounding the valve hole, and a first soft sealing material installed in the sealing groove, and the first soft sealing material is pressed and fitted on the strip-shaped flexible valve plate passing through the sealing groove from both sides.

14. The wrap-around flexible sealing valve according to claim 13, wherein: The first sealing structure is a static sealing structure; or The first sealing structure includes a dynamic sealing box arranged on one side of the strip-like flexible valve plate, the first soft sealing material filled in the dynamic sealing box, and an air bag arranged on one side of the dynamic sealing box for driving the first soft sealing material to squeeze the strip-like flexible valve plate. On the one side of the strip-like flexible valve plate, the first soft sealing material can dynamically achieve a tight fit with the strip-like flexible valve plate under the action of the air bag, and on the other side of the strip-like flexible valve plate, the first soft sealing material statically maintains a tight fit with the strip-like flexible valve plate.

15. The wrap-around flexible sealing valve according to claim 1, 13 or 14, wherein: A second sealing structure is also provided on the support frame, and the second sealing structure includes a stuffing box and a sealing cover arranged on the outside of the first side wall and the second side wall, and a second soft sealing material filled in the space limited by the stuffing box and the sealing cover, and the sealing cover includes a plurality of independent pressure plates arranged along the width direction of the strip-shaped flexible valve plate.

16. The wrap-around flexible sealing valve according to claim 1, wherein: The strip-shaped flexible valve plate is made of a metal plate and has a thickness of 0.5-3 mm, and an anti-corrosion coating is formed on at least one side of the metal plate.

17. The wrap-around flexible sealing valve according to claim 1 or 7, wherein: The winding drum includes two active winding drums, and the driving mechanism includes a first motor and a second motor, which are respectively used to drive the rotation of the two active winding drums in the winding drum.

18. A method for controlling the wrap-around flexible sealing valve as claimed in claim 17, comprising the operation of changing the position of the strip-shaped flexible valve plate relative to the valve hole to switch the sealing valve between an open state and a closed state, The operation of changing the position of the strip-shaped flexible valve plate relative to the valve hole to switch the sealing valve between the open state and the closed state includes: Rotate the first motor by an angle to release the tension of the strip-shaped flexible valve plate; The first motor and the second motor are caused to rotate synchronously to move the strip-shaped flexible valve plate; as well as After the synchronous rotation of the first motor and the second motor is stopped, the first motor or the second motor is rotated by an angle to tighten the belt-shaped flexible valve plate.

19. The method of claim 18, further comprising receiving positioning information and determining a position of the strip-shaped flexible valve plate relative to the valve hole based on the positioning information.

Images