Winding type flexible sealing valve

Abstract

The utility model discloses a winding type flexible sealing valve which comprises a supporting frame, a valve opening, a side wall surrounding the valve opening, a sealing element, a sealing element, a sealing element, a sealing element, a sealing element, a sealing element and a sealing element, and is characterized in that the supporting frame 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, 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 one sealing surface and at least one circulating surface, the sealing surface can completely cover and seal the valve hole, and the circulating surface comprises a circulating 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] This utility model relates to sealing valves, and more particularly to a spiral wound flexible sealing valve that can be used in petrochemical equipment. Background Technology

[0002] Gate valves are commonly used in petroleum, chemical, water conservancy, metallurgy, mining, and power industries. They are a type of media shut-off valve, primarily composed of a frame, shell, gate, guide rail, and opening / closing mechanism. The shell runs through the media flow channel and is perpendicular to the flow direction. The frame supports the gate when it is open. When the valve needs to be opened, the gate slides upward along the guide rail under the action of the opening / closing mechanism, thus creating a media passage. When the valve needs to be closed, the gate slides downward along the guide rail under the action of the opening / closing mechanism and its own weight, thus cutting off the media passage. Gate valves are mainly used to connect or disconnect the media in the body flow channel and are generally not used to regulate media flow.

[0003] Gate valves possess high structural strength and, due to their robust structure, can withstand the corrosive effects of media in pipelines, including but not limited to acidic corrosion or solid media erosion, for extended periods. However, gate valves are not without their drawbacks. For instance, the gate requires sufficient space to remain open, resulting in a relatively high overall height and impacting pipeline layout. Furthermore, for gate valves with a gate movement distance exceeding 2 meters, using cylinders / hydraulic levers or electric screws as opening and closing mechanisms is challenging. Typically, the gate's own weight is required to lower it and close the valve, limiting the use of large gate valves to horizontal pipelines.

[0004] There is an urgent need to provide a valve that can replace the gate valve in the above-mentioned technical fields and has better adaptability. Utility Model Content

[0005] The purpose of this invention is to provide a spiral wound flexible sealing valve to at least partially overcome the shortcomings of the prior art.

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

[0007] A support frame has a valve hole formed in the center and sidewalls surrounding the valve hole, the sidewalls including a first sidewall and a second sidewall opposite to each other, and frame channels formed on the first sidewall and the second sidewall.

[0008] The winding cylinder includes a first winding cylinder and a second winding cylinder respectively installed on the outer sides of the first sidewall and the second sidewall, wherein at least one of the first winding cylinder and the second winding cylinder is an active winding cylinder;

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

[0010] A drive mechanism is used to drive the winding cylinder to rotate, thereby controlling the movement and positioning of the strip-shaped flexible valve plate relative to the valve orifice.

[0011] The strip-shaped flexible valve plate has at least one closed surface and at least one flow surface arranged along its length direction. When the closed surface is aligned with the valve orifice, it can completely cover and close the valve orifice. The flow surface includes a flow hole to allow fluid medium to flow through it.

[0012] Preferably, the support frame further includes a valve plate support member, which has an elongated shape and extends from the inside of the sidewall adjacent to the strip flexible valve plate, for supporting the strip flexible valve plate when it deforms under the pressure of the fluid medium.

[0013] In some embodiments, the valve plate support may include a valve plate support rod disposed between two opposing sidewalls, at least one end of the valve plate support rod being axially movably connected to the sidewall. Alternatively or supplementarily, the valve plate support may include a valve plate support band that is elastic and whose two ends are fixed to the sidewall.

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

[0015] In some embodiments, the support frame further includes a valve plate support member having an elongated shape and extending from the inside of the sidewall adjacent to the strip flexible valve plate for supporting the strip flexible valve plate when it deforms under the pressure of the fluid medium; and the valve plate support member extends in a direction intersecting the reinforcing rib.

[0016] Preferably, the at least one closed surface includes 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 sidewall, wherein the first winding cylinder and the third winding cylinder are active winding cylinders, respectively winding around both ends of the strip-shaped flexible valve plate. In such an embodiment, preferably, the at least one flow surface includes at least a pair of adjacent flow surfaces, and the at least one closing surface includes closing surfaces respectively disposed on both sides of the pair of adjacent flow surfaces. Preferably, the at least one closing surface includes a pair of adjacent first closing surfaces and a pair of adjacent second closing surfaces respectively disposed on both sides of the pair of adjacent flow surfaces.

[0018] Preferably, the second winding cylinder is movable in directions away from and towards the first winding cylinder to tension the strip-shaped flexible valve plate.

[0019] Preferably, a plurality of positioning structures are formed on the side of the strip flexible valve plate extending along its length direction, and the wound 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 flexible valve plate relative to the valve hole.

[0020] Advantageously, the positioning structure may include at least one of shape markers, pattern markers, and magnetic markers; and the positioning detection mechanism may include at least one of distance sensors, pressure sensors, image sensors, and magnetic induction sensors.

[0021] In some embodiments, the positioning structure includes a positioning groove or a positioning protrusion, and the positioning detection mechanism includes an elastic contact that is biased toward and abuts against the side of the strip flexible valve plate. When the strip flexible valve plate moves, the positioning structure causes the elastic contact to change its extension and contraction state, thereby outputting the positioning information.

[0022] Preferably, the support frame is provided with a first sealing structure, the first sealing structure including 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 being pressed and fitted from both sides onto the strip flexible valve plate passing through the sealing groove.

[0023] In some embodiments, the first sealing structure is a static sealing structure.

[0024] In other embodiments, the first sealing structure includes a dynamic sealing box disposed on one side of the strip-shaped flexible valve plate, a first soft sealing material filled in the dynamic sealing box, and an airbag disposed on one side of the dynamic sealing box for driving the first soft sealing material to compress 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, while 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.

[0025] Preferably, the support frame is further provided with a second sealing structure, the second sealing structure including a stuffing box and a sealing gland disposed on the outside of the first side wall and the second side wall, and a second soft sealing material filling the space restricted by the stuffing box and the sealing gland, the sealing gland including a plurality of independent pressure plates arranged along the width direction of the strip flexible valve plate.

[0026] Preferably, the spiral flexible sealing valve further includes at least two sets of positioning rollers, each set of positioning rollers including a pair of rollers that press the strip flexible valve plate from both sides opposite to each other, the positioning rollers being disposed between the support frame and the spiral cylinder.

[0027] Preferably, the strip-shaped flexible valve plate is made of a metal sheet with a thickness of 0.5-3 mm, and an anti-corrosion coating is formed on at least one side of the metal sheet.

[0028] Preferably, the strip flexible valve plate is made of metal and has a thickness of 0.5-3 mm, or the strip flexible valve plate is made of corrosion-resistant non-metallic material and has a thickness of 5-8 mm.

[0029] Preferably, the winding cylinder includes two active winding cylinders, and the driving mechanism includes a first motor and a second motor, which are used to drive the rotation of the two active winding cylinders in the winding cylinder respectively.

[0030] The spiral-wound flexible sealing valve according to this utility model breaks through the limitation of using heavy gate plates (i.e., valve plates) in large pipelines in related technical fields. It proposes using a strip-shaped flexible valve plate, and provides spiral-wound drive for the strip-shaped flexible valve plate through a winding cylinder and a drive mechanism. In this way, on the one hand, the winding at both ends of the strip-shaped flexible valve plate reduces the housing space of the valve plate; on the other hand, the winding at both ends of the strip-shaped flexible valve plate provides tension force to the valve plate, enabling it to provide a sealing surface sufficient to cut off the medium in the pipeline while maintaining the flexibility of the valve plate itself.

[0031] Furthermore, by employing a strip-shaped flexible valve plate comprising two or more sealing surfaces, different sealing surfaces can be used alternately to extend the service life of each sealing surface, and / or the sealing valve can continue to be used without replacing parts when one of the sealing surfaces is damaged, thus better adapting to applications in pipelines where the flowing medium is corrosive. Attached Figure Description

[0032] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0033] Figure 1 A perspective view of an example of a spiral wound flexible sealing valve according to Embodiment 1 of the present invention;

[0034] Figure 2 for Figure 1 The cross-sectional view of the spiral wound flexible sealing valve is shown.

[0035] Figure 3 for Figure 1A three-dimensional view of a portion of the structure of the spiral wound flexible sealing valve shown.

[0036] Figure 4 An example of a strip-shaped flexible valve plate that can be used in a wound flexible sealing valve according to Embodiment 1 of the present invention is shown schematically.

[0037] Figure 5 Examples two and three are schematically shown of a strip-shaped flexible valve plate that can be used in a wound flexible sealing valve according to Embodiment 1 of the present invention;

[0038] Figure 6 Examples four and five are schematically shown of a strip-shaped flexible valve plate that can be used in a wound flexible sealing valve according to Embodiment 1 of the present invention;

[0039] Figure 7 A perspective view of an example of a spiral wound flexible sealing valve according to Embodiment 2 of this utility model;

[0040] Figure 8 for Figure 7 The cross-sectional view of the spiral wound flexible sealing valve is shown.

[0041] Figure 9 Different examples of strip flexible valve plates that can be used in a wound flexible sealing valve according to embodiments of the present invention are illustrated schematically.

[0042] Figure 10 An example of a valve plate support for a spiral wound flexible sealing valve according to an embodiment of the present invention is shown schematically;

[0043] Figure 11 A perspective view of an example of a spiral-wound flexible sealing valve with a valve plate support member according to an embodiment of the present invention;

[0044] Figure 12 This is a partial cross-sectional perspective view of the spiral wound flexible sealing valve according to an embodiment of the present utility model;

[0045] Figure 13 This is a partial cross-sectional view of a spiral wound flexible sealing valve according to an embodiment of the present invention, showing an example of a sealing structure;

[0046] Figure 14 This is a partial cross-sectional view of a spiral wound flexible sealing valve according to an embodiment of the present invention, showing another example of the sealing structure;

[0047] Figure 15 The second sealing structure with a split sealing gland is schematically shown;

[0048] Figure 16Different examples of mechanisms for determining the positioning information of a strip-shaped flexible valve plate relative to a valve orifice are illustrated schematically. Detailed Implementation

[0049] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. For ease of description, only the parts relevant to the invention are shown in the drawings. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0050] The spiral wound flexible sealing valve according to an embodiment of this utility model is used for installation in pipelines to control the flow and cut-off of fluid media in the pipelines. First, refer to... Figures 1 to 6 This invention introduces a spiral wound flexible sealing valve 100 according to Embodiment 1 of the present invention.

[0051] Figure 1 A perspective view of an example of a spiral wound flexible sealing valve 100. Figure 2 This is a cross-sectional view of the spiral wound flexible sealing valve 100. Figure 3 This is a perspective view of a portion of the structure of the spiral wound flexible sealing valve 100. Figures 1 to 3 As shown, the spiral wound flexible sealing valve 100 includes a support frame 10, a spiral wound cylinder 20, and a strip-shaped flexible valve plate 30 (see...). Figure 2 ) and drive mechanism 40.

[0052] Specifically, such as Figure 1 As shown, the support frame 10 has a valve hole 11 formed in the center and sidewalls 12 surrounding the valve hole 11. In the example shown in the figures, the support frame 10 has a rectangular shape and includes four sidewalls; however, this is not limiting. According to embodiments of the present invention, as Figure 1 As shown, the sidewall 12 includes at least a first sidewall 12a and a second sidewall 12b that are opposite to each other, and frame channels 13 are formed on the first sidewall 12a and the second sidewall 12b. In this application, the first sidewall and the second sidewall refer to sidewalls that are opposite to each other. In the case where, for example, the support frame 10 has a circular shape, the first sidewall and the second sidewall may each be composed of all or part of two opposite semicircular sidewalls.

[0053] like Figure 2 and Figure 3 As shown, the winding cylinder 20 includes a first winding cylinder 21 and a second winding cylinder 22 respectively installed on the outer sides of the first sidewall 12a and the second sidewall 12b. Figure 1In the example shown, both the first winding cylinder 21 and the second winding cylinder 22 are active winding cylinders and are driven to rotate by the drive mechanism 40. To further ensure the alignment of the strip flexible valve plate 30 with the winding cylinder 20, flanges 20a can be provided at both ends of each winding cylinder 20 to prevent the strip flexible valve plate 30 from deflecting when rotating around the winding cylinder 20.

[0054] Preferably, the drive mechanism 40 includes a first motor 41 and a second motor 42 to drive the first winding drum 21 and the second winding drum 22 to rotate, respectively. Alternatively or supplementarily, the drive mechanism 40 may have other different configurations. For example, the drive mechanism 40 may include only one motor, which is switchably connected to the first winding drum 21 and the second winding drum 22 via a transmission mechanism to drive the first winding drum 21 and the second winding drum 22 at different times. As another example, the drive mechanism 40 may include a manual drive structure, such as a handwheel.

[0055] like Figure 2 As shown, the strip-shaped flexible valve plate 30 passes through the frame channel 13 formed on 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. (Refer to the following...) Figures 4 to 6 As described in this embodiment of the present invention, the strip-shaped flexible valve plate 30 has at least one closing surface 31 and at least one flow surface 32 arranged along its length. When the closing surface 31 is aligned 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 a flow hole to allow fluid medium to flow through it, thereby opening the sealing valve when the flow surface is aligned with the valve hole 11. Figure 1 and Figure 3 The diagram shows the state where the flow surface 32 of the flexible strip valve plate 30 is aligned with the valve hole 11, thus opening the sealing valve. In this way, by driving the rotation of the winding cylinder 20 through the drive mechanism 40, the movement and positioning of the flexible strip valve plate 30 relative to the valve hole 11 can be controlled, thereby controlling the opening and closing of the sealing valve 100.

[0056] In the spiral wound flexible sealing valve according to the embodiment of this utility model, 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 where the sealing valve is applied, thus exhibiting excellent adaptability to equipment space. Furthermore, the valve plate 30 is moved by rotating the winding cylinder 20 via the drive mechanism 40, without relying on the weight of the valve plate itself. Therefore, the spiral wound flexible sealing valve according to the embodiment of this utility model can be applied to pipelines with various orientations, further improving its adaptability.

[0057] Traditionally, gate valves used in large pipelines in industries such as petrochemicals, water conservancy, metallurgy, and power have a very heavy structure. This is because these pipelines are not only large in size, but also carry media that often have high pressure, and in some cases, are subject to high temperatures, acid corrosion, or erosion by solid particles. The heavy gate structure helps 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 cumbersome.

[0058] The spiral-wound flexible sealing valve according to this utility model breaks through the limitations of using heavy-duty gate plates (i.e., valve plates) in pipelines in the aforementioned technical field. It proposes using a strip-shaped flexible valve plate and further provides a spiral-wound drive for the strip-shaped flexible valve plate through a winding cylinder and a drive mechanism. In this way, on the one hand, the winding at both ends of the strip-shaped flexible valve plate reduces the housing space of the valve plate; on the other hand, the winding at both ends of the strip-shaped flexible valve plate provides tension force to the valve plate, enabling it to provide a sealing surface sufficient to cut off the medium in the pipeline while maintaining the flexibility of the valve plate itself. Furthermore, the spiral-wound drive provides greater flexibility in positioning the strip-shaped flexible valve plate 30 relative to the valve hole 11, effectively coping with thermal expansion and contraction.

[0059] Considering the potential for media corrosion to the valve plate, including acid corrosion or solid particle erosion, the strip-shaped flexible valve plate 30 preferably includes two or more sealing surfaces 31. This allows for the alternating use of different sealing surfaces to extend their service life; or, when one sealing surface 31 is severely corroded, another sealing surface 31 can be selected as a replacement, thus extending the use of the sealing valve without requiring parts replacement. It should be understood that this invention does not limit the number of flow surfaces and sealing surfaces on the strip-shaped flexible valve plate; multiple surfaces can be provided as needed (e.g., at least two flow surfaces and / or at least two sealing surfaces). Because the winding itself significantly reduces the space required for the valve plate in the direction perpendicular to the pipe, even if the strip-shaped flexible valve plate 30 includes more flow surfaces and sealing surfaces, it still maintains a significant technical advantage in terms of adaptability to installation space.

[0060] In the spiral wound flexible sealing valve according to different embodiments of the present invention, the material and thickness of the valve plate can be optimized to ensure a good rolling effect of the strip flexible valve plate. For example, when the strip flexible valve plate is made of metal sheet (e.g., stainless steel 304, 316), the valve plate thickness is preferably 0.5-3 mm. Preferably, an anti-corrosion coating is formed on at least one side of the metal sheet of the strip flexible valve plate.

[0061] 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 especially beneficial for applications in gas media environments with low temperature, low pressure but strong corrosiveness.

[0062] The following will refer to Figures 4 to 6 introduce several examples of the strip-shaped flexible valve plate 30 that can be used according to Embodiment 1 of the present invention, namely strip-shaped flexible valve plates 30A, 30A', 30B, 30C, 30D.

[0063] Figure 4 In the shown 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 plane). 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. The flow surface 32 includes exemplary flow holes 32a, and the flow holes 32a include a plurality of flow holes arranged in an array.

[0064] 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 high 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.

[0065] Figure 4 In the shown example, reinforcing ribs 33 extending along the length direction of the strip-shaped flexible valve plate 30A are formed between the flow holes 32a, especially improving the tensile strength of the strip-shaped flexible valve plate along the winding direction.

[0066] 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 already 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, without additionally increasing the driving operation of the driving mechanism on the winding cylinder when selecting different closed surfaces to achieve the shut-off of the sealing valve, which is convenient for operation and shortens the operation time.

[0067] Figure 5 and Figure 6 The main difference between the strip-shaped flexible valve plates 30A', 30B, 30C, and 30D shown lies in the different flow holes in the flow surface 32.

[0068] 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.

[0069] 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 it is overall 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 it is overall 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.

[0070] In the examples introduced above, several flow holes on the same flow surface 32 form a generally rectangular medium flow opening as a whole, but this is not restrictive, and the flow surface 32 can also provide an opening in other shapes such as circular, hexagonal, etc. as a whole. For example, Figure 6 In the strip-shaped flexible valve plate 30D shown in figure (b) in [reference], multiple flow holes 32d form a circular opening as a whole. In addition, similarly, a reinforcing rib 33 can be formed between the flow holes 32d.

[0071] Next, refer to Figures 7 to 9 This invention introduces a spiral wound flexible sealing valve 200 according to Embodiment 2 of the present invention. Figure 7 A perspective view of an example of a spiral wound flexible sealing valve 200 (drive mechanism omitted). Figure 8 This is a cross-sectional view of the spiral wound flexible sealing valve 200. Figure 9 Different examples of strip flexible valve plates that can be used in a spiral flexible sealing valve 200 are schematically shown.

[0072] The spiral wound flexible sealing valve 200 according to Embodiment 2 of this utility model has a structure that is substantially the same as that of the spiral wound flexible sealing valve 100 according to Embodiment 1 of this utility model. The difference is that in the sealing valve 200, the winding cylinder 20 further includes a third winding cylinder 23 disposed outside the first side wall 12a, and the first winding cylinder 21 and the third winding cylinder 23 are active winding cylinders, respectively wound around the two ends of the strip flexible valve plate 30. The second winding cylinder 22 winds the middle part of the strip flexible valve plate 30, and is used to tension the strip flexible valve plate 30 between the first winding cylinder 21 and the third winding cylinder 23.

[0073] In some implementations, the second winding cylinder 22 can be implemented as a driven winding cylinder. In another implementation, 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 hole formed on the strip flexible valve plate 30 to assist in driving the movement of the strip flexible valve plate 30.

[0074] Preferably, the drive mechanism 40 (not shown in the figure) of the spiral wound flexible sealing valve 200 may include a first motor and a second motor for driving the rotation of the first winding cylinder 21 and the third winding cylinder 23, respectively.

[0075] Optionally, in the implementation where the second winding drum 22 is an active winding drum, the drive structure 40 may further include a third motor for driving the second winding drum 22. In this case, the second winding drum 22 may be configured to move in directions away from and towards the first winding drum 21 to tension the strip-shaped flexible valve plate 30.

[0076] The drive mechanism 40 of the spiral wound flexible sealing valve 200 can also have other different configurations. For example, the drive mechanism 40 may consist of only one motor, which is switchably connected to the first winding drum 21 and the third winding drum 23 via a transmission mechanism to drive the first winding drum 21 and the third winding drum 23 at different times. As another example, the drive mechanism 40 may include a manual drive structure, such as a handwheel.

[0077] According to Embodiment 2 of the present invention, in the spiral-wound flexible sealing valve 200, the portion of the strip-shaped flexible valve plate 30 between the first winding cylinder 21 and the second winding cylinder 22, and the portion between the second winding cylinder 22 and the third winding cylinder 23, respectively spans the valve orifice; correspondingly, the strip-shaped flexible valve plate includes at least one pair of adjacent flow surfaces, and preferably includes closing surfaces respectively arranged on both sides of the pair of adjacent flow surfaces. As discussed above, the closing surfaces arranged on both sides of the flow surfaces allow for more flexible switching between the flow surfaces and different closing surfaces, without additional driving operation of the winding cylinder by the drive mechanism when selecting different closing surfaces to achieve the shut-off of the sealing valve.

[0078] This is merely an example and not a limitation. Figure 9 Different examples of strip-shaped flexible valve plates that can be used in sealing valve 200 are shown.

[0079] Figure 9 In the example shown in figure (a), the strip 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 disposed on both sides of the pair of flow surfaces 32. The pair of adjacent flow surfaces 32 can be aligned with the valve orifice 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, thereby providing a medium flow channel. The medium can be shut off when either the first closing surface 31-1 or the second closing surface 31-2 on both sides is positioned to be aligned with the valve orifice 11.

[0080] Figure 9 In the example shown in Figure (b), the strip 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 disposed on both sides of the pair of adjacent flow surfaces 32. In this example, the medium can be shut off 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 orifice 11. 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 orifice 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 a medium shut-off function. This is beneficial for providing better sealing and shut-off functions, and is particularly suitable for applications where the pressure difference between the media on both sides is large when the valve is closed or where the sealing requirements between the two sides are high.

[0081] The other structures of the strip flexible valve plate in the spiral flexible sealing valve 200 according to Embodiment 2 can be the same as or similar to the strip flexible valve plate in the sealing valve 100 according to Embodiment 1. Further details will not be provided here.

[0082] Next, refer to Figures 10 to 16 This invention introduces some preferred structural features that can be applied to sealing valves according to different embodiments of the present invention.

[0083] According to the preferred embodiment of this utility model, such as Figure 10 As shown, the support frame 10 may further include a valve plate support 14. Specifically, the valve plate support 14 is configured to extend from the inside of the sidewall adjacent to the flexible strip valve plate 30, supporting the flexible strip valve plate 30 when it deforms under the pressure of the fluid medium. Due to the medium pressure in the pipeline and the thinness of the flexible strip valve plate 30, the pressure difference formed by the medium on both sides of the sealing valve can easily cause the flexible strip valve plate 30 to bulge (especially when the sealing valve is closed), damaging the valve plate. The valve plate support 14 can help improve or avoid the valve plate bulging problem caused by the medium pressure difference. Preferably, the valve plate support 14 is located on the side of the flexible strip valve plate 30 where the pressure is lower when the spiral flexible sealing valve is closed. In addition, this also causes the flexible valve plate 30 to move on the winding cylinder 20, which may disrupt the accurate positioning of the flexible strip valve plate 30 relative to the valve hole 11. Figure 11 The diagram illustrates one of the support states of the valve plate support 14 on the strip flexible valve plate 30, where the flow surface 32 of the strip flexible valve plate 30 is aligned with the valve hole 11, and the valve plate support 14 rests against and is supported on the reinforcing rib 33. In contrast, when the closing surface 31 of the strip flexible valve plate 30 is aligned with the valve hole 11, the pressure exerted by the upstream medium on the closing surface 31 increases because the medium on both sides of the sealing valve is cut off. In this case, the valve plate support 14 rests against and supports the closing surface 31, providing a more prominent protective function for the valve plate.

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

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

[0086] Preferably, such as Figure 10 As shown, the valve plate support rod 14 may include an intermediate support section 14c, which is offset relative to the two ends 14a and 14b toward the strip-shaped flexible valve plate 30 to better contact and support the valve plate. Simultaneously, this arrangement 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 and 14b can be moved away from the fluid passage 13, thereby facilitating end installation.

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

[0088] Figure 12 This is a partial cross-sectional perspective view of a spiral wound flexible sealing valve according to an embodiment of the present invention. Figure 12 As shown, and return to reference Figure 2 and Figure 8 As can be seen, the spiral-wound flexible sealing valve according to the embodiment of this utility model may 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 press the strip-shaped flexible valve plate 30 from both sides relative to each other (see...). Figure 12 ).exist Figure 2 In the spiral wound flexible sealing valve 100 shown, two sets of positioning rollers 50 are respectively disposed between the first sidewall 12a and the second sidewall 12b of the support frame 10 and the first winding cylinder 21 and the second winding cylinder 22, which serve as active winding cylinders. Figure 8 In the spiral-wound flexible sealing valve 200 shown, 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, which serve as active winding cylinders. Although Figure 8Although not shown in the diagram, a positioning roller may be provided between the second sidewall 12b and the second winding cylinder 22 as needed. The positioning roller 50 flattens and centers the strip flexible valve plate 30 unfolding from the winding cylinder, preventing deformation of the strip flexible valve plate 30 or misalignment of the plane of the strip flexible valve plate 30 with the frame channel 13, which would affect the sealing effect.

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

[0090] Combined with reference Figures 12 to 14 The support frame 10 is provided with a first sealing structure 60, which 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 The first soft sealing material 62 is installed in the sealing groove 61 and is pressed from both sides onto the strip flexible valve plate 30 that passes through the sealing groove 61.

[0091] exist Figure 12 and Figure 13 In the example shown, the first sealing structure 60 is a static sealing structure, wherein the first soft sealing material 62 on both sides of the strip-shaped flexible valve plate 30 statically maintains a pressing fit with the flexible valve plate 30, thereby maintaining a seal on the flexible valve plate 30. Preferably, as Figure 12 and Figure 13 As shown, the first sealing structure 60 may 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. It contains the first soft sealing material 62 to keep the first soft sealing material 62 pressed against the side surface of the valve plate 30 to ensure a sealing effect.

[0092] exist Figure 14 In the example shown, 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 disposed 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 air bladder 65 disposed on one side of the dynamic sealing box 64 for driving the first soft sealing material 62 to compress the strip-shaped flexible valve plate 62. Figure 14As shown in Figure (a), when the airbag 65 inflates, it compresses the first soft sealing material 62, pressing it against the strip-shaped flexible valve plate 30 to achieve a sealing fit. As shown in Figure (b), when the airbag 65 deflates, it allows the first soft sealing material 62 to release the sealing fit between itself and 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 U-shaped dynamic sealing box 66 is provided outside the dynamic sealing box 64, and the dynamic sealing box 64 can move in a direction perpendicular to the surface of the valve plate within the dynamic sealing box 66. The airbag 65 can be disposed between the U-shaped bottom surface of the dynamic sealing box 64 and the U-shaped bottom surface of the dynamic sealing box 66. The airbag 65 can be an integral airbag for compressing the entire dynamic sealing box 64 (the dynamic sealing box 64 has a contour shape corresponding to the valve hole 11), or it can include multiple airbags distributed along the dynamic sealing box 64. For example, airbag 65 may 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 a connection with... Figure 12 and Figure 13 The same static sealing structure is shown, wherein the first soft sealing material 62 is statically maintained in a compressed fit with the strip-shaped flexible valve plate 30. It should be understood that the first sealing structure of the spiral wound flexible sealing valve according to the embodiments of this utility model can also employ a dynamic sealing structure on both sides of the flexible valve plate, which will not be elaborated further here. Furthermore, the structure used to achieve the dynamic seal is not limited to the above-described airbag-based structure; for example, a cylinder or similar device can be used as a driving device to compress the first soft sealing material.

[0094] To ensure sealing, the soft sealing material in the static sealing structure typically maintains a certain preload. This preload causes wear on the sealing surfaces (the surfaces where the valve plate and the soft sealing material contact each other) on both sides of the valve plate during the movement of the flexible valve plate 30. The dynamic sealing function provided by the first sealing structure 60 allows for reduced wear on the sealing surfaces during the movement of the flexible valve plate 30, thereby protecting the valve plate. This dynamic seal also helps reduce the movement resistance of the flexible valve plate 30, making valve operation more convenient and rapid. Furthermore, providing a dynamic sealing structure only on one side of the valve plate 30 simplifies the equipment structure and reduces costs. Preferably, the dynamic sealing structure is located on the side of the sealing valve where the medium pressure is lower, which helps reduce medium leakage when the seal is released.

[0095] According to the embodiment of the present invention, in the spiral flexible sealing valve, the dynamic sealing structure in the first sealing structure is controlled to release the seal of the dynamic sealing structure on the valve plate 30 before the strip flexible valve plate 30 is moved, so as to move the valve plate 30; and after the strip flexible valve plate 30 is moved to the target position, the seal of the dynamic sealing structure on the valve plate 30 is restored to avoid media leakage.

[0096] Figure 12 , Figure 13 and Figure 14 The diagram also shows a second sealing structure 70 for a wound flexible sealing valve according to an embodiment of the present invention. (See attached diagram.) Figures 12 to 14 As shown, the second sealing structure 70 is disposed on the support frame 10, and includes a stuffing box 71 and a sealing gland 72 disposed on the outer sides of the first side wall 12a and the second side wall 12b, and a second soft sealing material 73 filled in the space confined by the stuffing box 71 and the sealing gland 72. The sealing gland 72 can be fixed to the stuffing box 71, for example, by a threaded connection, thereby compressing the second soft sealing material 73 filled in the internal space, so that it is pressed tightly against both sides of the strip flexible valve plate 30.

[0097] By combining the first sealing structure 60 and the second sealing structure 70, the spiral wound flexible sealing valve according to this embodiment of the invention can effectively prevent media leakage to the outside of the pipeline. Specifically, even if the dynamic seal in the first sealing structure is released, or if the static seal in the first sealing structure fails (e.g., due to wear), media leakage will not occur due to the presence of the second sealing structure.

[0098] Figure 15 A preferred example of the second sealing structure 70 is schematically shown, wherein the sealing gland 72 has a split structure. Specifically, Figure 15 Figure (a) shows the state of the second sealing structure 70 with the sealing gland 72 removed, exposing the stuffing box 71. Figure (b) shows the state after the sealing gland 72 is fixed to the stuffing box 71. Figure 15 As shown, the sealing gland 72 may include a plurality of independent pressure plates 72a arranged along the width direction (up and down direction in the figure) of the strip flexible valve plate 30.

[0099] The split-type sealing gland can be flexibly configured according to the required sealing width of the strip flexible valve plate, thus enabling the spiral wound flexible sealing valve according to the present invention to well adapt to the sealing needs of large pipelines in technical fields such as petrochemical, water conservancy, metallurgy, and power. The split-type sealing gland reduces the requirements for machining precision and allows for the provision of standard-sized pressure plates to meet the needs of different sealing widths, which helps to reduce equipment costs.

[0100] Return to reference Figure 1 and Figure 2 The spiral wound flexible sealing valve 100 according to Embodiment 1 of this utility model may further include a winding cylinder box 80 covering the outside of the support frame 10, for enclosing the winding cylinder 2, positioning roller 50, and other structures therein. Although not shown in the figure, the spiral wound flexible sealing valve 200 according to Embodiment 2 of this utility model may also include such a winding cylinder box. By providing the winding cylinder box 80, the winding cylinder and positioning roller can be supported on the one hand, and leakage of the medium to the outside of the pipeline and sealing valve can be further prevented on the other hand.

[0101] Furthermore, according to the preferred embodiment of this utility model, such as Figure 16 As shown, a positioning structure 34 may be provided on the side of the strip flexible valve plate 30 along its length direction (indicated by the double arrows in the figure), and the spiral wound flexible sealing valve may also include a positioning detection mechanism 90 for detecting the positioning structure 34 to output positioning information. The positioning information refers to information used to determine the position of the strip flexible valve plate 30 relative to the valve hole 11.

[0102] Return to reference Figure 5 , Figure 5 Figure (a) shows that multiple positioning structures 34 are formed on the side of the strip-shaped flexible valve plate 30A' extending along its length. For clarity, Figure 5 Only two positioning structures on one side of the valve plate are shown. It should be understood that positioning structures can be provided on both sides of the strip-shaped flexible valve plate 30 along its length, and the number of positioning structures can be determined according to the number of closed surfaces and flow surfaces that need to be positioned. Advantageously, the positioning structures 34 can be provided in pairs on both sides of the valve plate 30. In some cases, the paired positioning structures 34 can be aligned with each other along the length of the valve plate; this redundancy helps to detect positioning information more reliably. In other cases, the paired positioning structures 34 can be offset from each other by a predetermined distance along the length of the valve plate to allow the valve plate's movement direction and / or speed to be obtained based on the positioning information detected by different positioning structures 34, further improving the accuracy of valve operation.

[0103] Figure 16 Different examples of positioning structures and positioning detection mechanisms for determining the positioning information of a strip flexible valve plate relative to a valve orifice are schematically shown.

[0104] exist Figure 16 In the example shown in Figure (a), the positioning structure 34 includes a positioning protrusion 34a, and the positioning detection mechanism 90 includes an elastic contact 91 that is biased toward and abuts against the side of the strip flexible valve plate 30. When the strip flexible valve plate 30 moves, the positioning protrusion 34a causes the elastic contact 91 to change its extension and contraction state, thereby outputting positioning information. Figure 16 The diagram shows a resilient contact 91 comprising a spring and a ball-shaped contact member connected to the end of the spring. However, this invention is not limited to the resilient contact 91 employing a specific construction. Figure 16 In the example shown in Figure (a), the positioning structure 34 may also include a positioning groove as an alternative or supplement.

[0105] exist Figure 16 In the example shown in Figure (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 the distance sensor 92, the distance sensor 92 detects the change in distance from the side of the valve plate at the positioning groove 34b, thereby obtaining the corresponding positioning information. In this example, as an alternative or supplement, the positioning structure 34 may also include a positioning protrusion.

[0106] Figure 16 The illustrations shown are merely 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 may include 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; and when the positioning structure 34 includes a magnetic mark, the positioning detection mechanism 90 may include a magnetic induction sensor.

[0107] Reference above Figures 1 to 9 The spiral wound flexible sealing valves 100 and 200 according to embodiments of the present invention can be controlled by means of changing the position of the strip flexible valve plate relative to the valve orifice to switch the sealing valve between an open state and a closed state, and the operation further includes:

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

[0109] (2) To make the first motor and the second motor rotate synchronously to move the strip-shaped flexible valve plate; and

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

[0111] It should be understood that, since the first motor and the second motor have an equivalent structural relationship in the spiral flexible sealing valve according to the present utility model embodiment, the "first motor" in step (1) of the above control method is not inherently limited to one of the two motors, but can be either of them.

[0112] Preferably, the control method may further include receiving positioning information and determining the position of the strip flexible valve plate relative to the valve orifice based on the positioning information.

[0113] For ease of understanding, the following example of the execution of the above control method is described with reference to the structure shown in the attached diagram. Figure 2 The spiral wound flexible sealing valve 100 shown is combined with Figure 5 and Figure 6 Taking any one of the strip-shaped flexible valve plates 30A', 30B, 30C, and 30D as an example, and assuming that the initial state of the sealing valve 100 is that the first sealing surface 31-1 closes the valve hole 11, then:

[0114] When it is necessary to open the sealing valve 100, firstly, control the first motor 41 to rotate clockwise (to... Figure 2 (Using the rotation direction shown in the image as a reference) Rotate a small angle to release the tension of the flexible strip 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, moving the flexible strip valve plate 30 to the left; after moving a predetermined distance, or when positioning information is received and it is determined according to the positioning information that the flow surface 32 of the flexible strip 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 second motor 42 to rotate a small angle clockwise to tension the flexible strip valve plate 30. At this time, the flow surface 32 is aligned with the valve hole 11, and the sealing valve 100 is opened.

[0115] When it is necessary to close the sealing valve 100, the second motor 42 is controlled to rotate counterclockwise by a small angle to release the tension of the strip flexible valve plate 30. Then, the first motor 41 and the second motor 42 are controlled to rotate counterclockwise synchronously to drive the first winding cylinder 21 and the second winding cylinder 22 to rotate, so that the strip flexible valve plate 30 continues to move to the left. After moving a predetermined distance, or when positioning information is received and it is determined according to the positioning information that the second sealing surface 31-2 of the strip flexible valve plate 30 is aligned with the valve hole 11, the rotation of the first motor 41 and the second motor 42 is stopped. Subsequently, the first motor 41 is controlled to rotate counterclockwise by a small angle to tension the strip flexible valve plate 30. At this time, the second sealing surface 31-2 is aligned with the valve hole 11, and the sealing valve 100 is closed.

[0116] When the sealing valve 100 needs to be reopened, firstly, the first motor 41 is controlled to rotate clockwise by a small angle to release the tension of the flexible strip valve plate 30; then, the first motor 41 and the second motor 42 are controlled to rotate clockwise synchronously to drive the first winding drum 21 and the second winding drum 22 to rotate, moving the flexible strip valve plate 30 to the right; after moving a predetermined distance, or when positioning information is received and it is determined according to the positioning information that the flow surface 32 of the flexible strip valve plate 30 is aligned with the valve hole 11, the rotation of the first motor 41 and the second motor 42 is stopped; then, the first motor 41 is controlled to rotate counterclockwise by a small angle to tension the flexible strip valve plate 30. At this time, the flow 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, the second motor 42 is controlled to rotate counterclockwise by a small angle to release the tension of the strip flexible valve plate 30. Then, the first motor 41 and the second motor 42 are controlled to rotate clockwise synchronously to drive the first winding cylinder 21 and the second winding cylinder 22 to rotate, and the strip flexible valve plate 30 continues to move to the right. After moving a predetermined distance, or when positioning information is received and it is determined according to the positioning information that the first sealing surface 31-1 of the strip flexible valve plate 30 is aligned with the valve hole 11, the rotation of the first motor 41 and the second motor 42 is stopped. Subsequently, the second motor 42 is controlled to rotate clockwise by a small angle to tension the strip flexible valve plate 30. At this time, the first sealing surface 31-1 is aligned with the valve hole 11, and the sealing valve 100 is closed.

[0118] It should be understood that the above control method was applied in each of the above processes of closing or opening the sealing valve 100.

[0119] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A wrap-around flexible seal valve for installation in a pipe to control the passage and interruption of a fluid medium in the pipe, characterized in that, include: A support frame has a valve hole formed in the center and sidewalls surrounding the valve hole, the sidewalls including a first sidewall and a second sidewall opposite to each other, and frame channels formed on the first sidewall and the second sidewall. The winding cylinder includes a first winding cylinder and a second winding cylinder respectively installed on the outer sides of the first sidewall and the second sidewall, wherein at least one of the first winding cylinder and the second winding cylinder is an active winding cylinder; A strip-shaped flexible valve plate passes through the frame channel and is wound around the first winding cylinder and the second winding cylinder; as well as A drive mechanism is used to drive the winding cylinder to rotate, thereby controlling the movement and positioning of the strip-shaped flexible valve plate relative to the valve orifice. The strip-shaped flexible valve plate has at least one closed surface and at least one flow surface arranged along its length direction. When the closed surface is aligned with the valve orifice, it can completely cover and close the valve orifice. The flow surface includes a flow hole to allow fluid medium to flow through it.

2. The flexible seal wrap valve of claim 1, wherein, The support frame also includes a valve plate support member, which has an elongated shape and extends from the inside of the sidewall adjacent to the strip flexible valve plate, for supporting the strip flexible valve plate when it deforms under the pressure of the fluid medium.

3. The flexible seal wrap valve of claim 2, wherein, The valve plate support includes a valve plate support rod disposed between two opposing side walls, at least one end of which is axially movably connected to the side wall; or The valve plate support includes a valve plate support strip, which is elastic and has its two ends fixed to the side wall.

4. The flexible seal wrap valve of claim 1, wherein, The flow surface also includes at least one reinforcing rib formed between the flow holes and extending along the length of the strip-shaped flexible valve plate.

5. The flexible seal wrap valve of claim 4, wherein, The support frame further includes a valve plate support member, which has an elongated shape and extends from the inside of the sidewall adjacent to the strip-shaped flexible valve plate, for supporting the strip-shaped flexible valve plate when it deforms under the pressure of the fluid medium; and The valve plate support extends in the direction intersecting with the reinforcing rib.

6. The flexible seal wrap valve of claim 1, wherein, The at least one closed surface includes a first closed surface and a second closed surface arranged on both sides of a flow surface.

7. The flexible seal wrap valve of claim 1, wherein, The winding cylinder also includes a third winding cylinder disposed on the outside of the first sidewall. The first winding cylinder and the third winding cylinder are active winding cylinders, which respectively wind the two ends of the strip-shaped flexible valve plate.

8. The spiral wound flexible sealing valve as described in claim 7, characterized in that, The at least one flow surface includes at least one pair of flow surfaces adjacent to each other, and the at least one closed surface includes closed surfaces respectively arranged on both sides of the pair of adjacent flow surfaces.

9. The spiral wound flexible sealing valve as described in claim 8, characterized in that, The at least one closed surface includes 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.

10. The spiral wound flexible sealing valve as described in claim 7, characterized in that, The second winding cylinder is capable of moving away from and towards the first winding cylinder to tension the strip-shaped flexible valve plate.

11. The spiral wound flexible sealing valve as described in claim 1, characterized in that, The strip-shaped flexible valve plate has multiple positioning structures formed on its length-extending side, and the spiral flexible sealing valve also includes a positioning detection mechanism that detects the positioning structures and outputs positioning information to determine the position of the strip-shaped flexible valve plate relative to the valve hole.

12. The spiral wound flexible sealing valve as described in claim 11, characterized in that, The positioning structure includes at least one of shape markers, pattern markers, and magnetic markers; and the positioning detection mechanism includes at least one of distance sensors, pressure sensors, image sensors, and magnetic induction sensors.

13. The spiral wound flexible sealing valve as described in claim 12, characterized in that, The positioning structure includes a positioning groove or a positioning protrusion, and the positioning detection mechanism includes an elastic contact that is biased toward and abuts against the side of the strip flexible valve plate. When the strip flexible valve plate moves, the positioning structure causes the elastic contact to change its extension and contraction state, thereby outputting the positioning information.

14. The spiral wound flexible sealing valve as described in claim 1, characterized in that, The support frame is provided with a first sealing structure, which 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 from both sides onto the strip flexible valve plate that passes through the sealing groove.

15. The spiral wound flexible sealing valve as described in claim 14, characterized in that, The first sealing structure is a static sealing structure; or The first sealing structure includes a dynamic sealing box disposed on one side of the strip-shaped flexible valve plate, a first soft sealing material filled in the dynamic sealing box, and an air bladder disposed on one side of the dynamic sealing box for driving the first soft sealing material to compress 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 air bladder, while 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.

16. The spiral wound flexible sealing valve as described in claim 1, 14, or 15, characterized in that, The support frame is also provided with a second sealing structure, which includes a stuffing box and a sealing gland disposed on the outside of the first side wall and the second side wall, and a second soft sealing material filling the space restricted by the stuffing box and the sealing gland. The sealing gland includes a plurality of independent pressure plates arranged along the width direction of the strip flexible valve plate.

17. The spiral wound flexible sealing valve as described in claim 1, 14, or 15, characterized in that, It also includes at least two sets of positioning rollers, each set of positioning rollers comprising a pair of rollers that press the strip flexible valve plate from both sides opposite each other, the positioning rollers being disposed between the support frame and the winding cylinder.

18. The spiral wound flexible sealing valve as described in claim 1, characterized in that, The strip-shaped flexible valve plate is made of a metal sheet with a thickness of 0.5-3 mm, and an anti-corrosion coating is formed on at least one side of the metal sheet.

19. The spiral wound flexible sealing valve as described in claim 1, characterized in that, The strip-shaped flexible valve plate is made of metal and has a thickness of 0.5-3 mm, or the strip-shaped flexible valve plate is made of corrosion-resistant non-metallic material and has a thickness of 5-8 mm.

20. The spiral wound flexible sealing valve as described in claim 1 or 7, characterized in that, The winding cylinder includes two active winding cylinders, and the driving mechanism includes a first motor and a second motor, which are used to drive the rotation of the two active winding cylinders in the winding cylinder respectively.

Images