A floating rigid support bellows seal valve

Abstract

The present application relates to a kind of rigid floating support bellows seal valves, including valve shell, valve stem is arranged in valve shell, bellows is also arranged in valve shell, one end of bellows is fixed with valve shell, the other end is fixed with valve stem, the outer periphery of bellows is equipped with inner rigid support ring assembly and outer rigid support ring assembly, wherein inner rigid support ring assembly is attached with the outer surface between the position of bellows valley and valley and peak, outer rigid support ring assembly is located in the outer periphery of inner rigid support ring assembly, the inner annular surface of outer rigid support ring assembly is attached with the outer surface of the position of bellows peak, outer rigid support ring assembly and inner rigid support ring assembly clearance fit, the valve of the present application overcomes the defect of supporting bellows by filler.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of valve, in particular to a floating rigid support corrugated pipe sealing valve. BACKGROUND

[0002] The statements herein are provided only to enhance understanding of the present application and are not necessarily intended to constitute the prior art.

[0003] At present, the corrugated pipe sealing valve adopts filling liquid or gas or solid powder into the inside or outside of the corrugated pipe to support the corrugated pipe, for example, the patent CN114087420A discloses a sealing structure of valve rod and valve, the inner cavity of the corrugated pipe is provided with an inner cavity filler, and the corrugated pipe is supported by filling the support filler on one side of the corrugated pipe, which solves the problem that the existing corrugated pipe valve cannot be used in high-pressure fluid systems, but the inventor finds that in the above-mentioned way, the filler flows with the expansion and contraction of the corrugated pipe during the opening and closing of the valve, if the flow is not sufficient, the filler will be more in some parts and less in some parts, the places with more filler will hinder the expansion and contraction of the corrugated pipe, and even cause the corrugated pipe to be crushed and fail, and the places with less filler will reduce the support effect on the corrugated pipe, which will cause the corrugated pipe to fail when the medium pressure is large. At the same time, with the opening and closing of the valve, the volume of the filling cavity where the filler is located changes, thereby affecting the support effect of the filler on the corrugated pipe. SUMMARY

[0004] The purpose of the present application is to overcome the shortcomings of the prior art, and to provide a rigid floating support corrugated pipe sealing valve, which solves the defects of the prior art using fillers to support the corrugated pipe.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical scheme

[0006] In a first aspect, the embodiments of the present application provide a rigid floating support corrugated pipe sealing valve, which comprises a valve shell, a valve rod arranged in the valve shell, and a corrugated pipe arranged in the valve shell, wherein one end of the corrugated pipe is fixed to the valve shell, and the other end is fixed to the valve rod, an inner rigid support ring assembly and an outer rigid support ring assembly are arranged on the outer periphery of the corrugated pipe, the inner rigid support ring assembly is attached to the outer surface of the position between the corrugated pipe valleys and the valleys and peaks, the outer rigid support ring assembly is located on the outer periphery of the inner rigid support ring assembly, the inner ring surface of the outer rigid support ring assembly is attached to the outer surface of the position of the corrugated pipe peaks, the outer ring surface is attached to the inner side surface of the valve shell, and the outer rigid support ring assembly and the inner rigid support ring assembly are gap fitted.

[0007] Optionally, the inner ring surface of the inner rigid support ring assembly is an outer convex surface, which is attached to the outer surface of the position of the corrugated pipe valleys.

[0008] Optionally, the outer ring surface of the outer rigid support ring assembly has an annular arc groove, and the outer ring surface is fitted to the inner surface of the corrugated tube at the wave crest position through the annular arc groove.

[0009] Optionally, along the axis direction of the corrugated tube, the junction positions of adjacent outer rigid support ring assemblies are arranged to be staggered with the wave crest positions of the corrugated tube.

[0010] In a second aspect, embodiments of the present application provide a rigid floating support corrugated tube sealing valve, comprising a valve shell, a valve rod arranged in the valve shell, and a corrugated tube arranged in the valve shell, one end of the corrugated tube being fixed to the valve shell, and the other end being fixed to the valve rod, the corrugated tube being internally provided with an inner rigid support ring assembly and an outer rigid support ring assembly, the outer rigid support ring assembly being fitted to the inner surface of the corrugated tube at the wave crest position and the position between the wave crest and the wave trough, the outer ring surface of the inner rigid support ring assembly being fitted to the inner surface of the corrugated tube at the wave trough position, the inner ring surface being fitted to the valve rod, and the outer rigid support ring assembly being arranged at the outer periphery of the inner rigid support ring and being gap fitted.

[0011] Optionally, the outer ring surface of the outer rigid support ring assembly is an outer convex surface, and the outer convex surface is fitted to the inner surface of the corrugated tube at the wave crest position.

[0012] Optionally, the outer ring surface of the inner rigid support ring assembly has an annular arc groove, and the outer ring surface is fitted to the inner surface of the corrugated tube at the wave trough position through the annular arc groove.

[0013] Optionally, along the axis direction of the corrugated tube, the junction positions of adjacent inner rigid support ring assemblies are arranged to be staggered with the wave trough positions of the corrugated tube.

[0014] Optionally, the inner rigid support ring assembly is composed of at least one inner rigid support ring, the inner rigid support ring being composed of an annular structure of a plurality of first ring blocks in the ring direction, and when the inner rigid support ring assembly is composed of a plurality of inner rigid support rings, the plurality of inner rigid support rings are coaxially arranged in a sleeved manner.

[0015] Optionally, the outer rigid support ring assembly is composed of at least one outer rigid support ring, the outer rigid support ring being composed of an annular structure of a plurality of second ring blocks in the ring direction, and when the outer rigid support ring assembly is composed of a plurality of outer rigid support rings, the plurality of outer rigid support rings are coaxially arranged in a sleeved manner.

[0016] The present application has the following beneficial effects:

[0017] 1.The bellows seal valve of the present application, due to the inner rigid support ring assembly and the outer rigid support ring assembly being arranged in close contact with the bellows, can float up and down with the movement of the valve stem, forming a rigid floating support, playing a supporting role on the bellows, while the inner rigid support ring assembly and the outer rigid support ring assembly are clearance fitted, which can meet the radial size change requirement of the bellows expansion and contraction, when the valve is opened, the adjacent rigid support ring assemblies are in close contact, providing support for the bellows, improving the pressure bearing capacity of the valve, using the rigid support ring assembly to support the bellows, without using filler, there is no flow problem of the filler, the rigid floating support will not be affected by the volume change of the filler cavity, and can better provide support for the bellows.

[0018] 2.The bellows seal valve of the present application, the inner rigid support ring and the outer rigid support ring are both composed of a plurality of ring blocks, which can meet the floating of the inner rigid support ring assembly and the outer rigid support ring assembly when the bellows expands and contracts to produce radial deformation, and avoid interfering with the movement of the bellows. BRIEF DESCRIPTION OF DRAWINGS

[0019] The drawings accompanying the specification of this application form a part thereof, serve to provide further understanding of the application, and together with the description of the exemplary embodiments of the application, serve to explain the application, and do not constitute limitations on the application.

[0020] Figure 1 It is the overall structure front view of the embodiment 1 of the present application;

[0021] Figure 2 It is the overall structure front view of the embodiment 2 of the present application;

[0022] Wherein, 1.valve stem, 2.valve cover, 3.bellows, 4.inner rigid support ring, 5.outer rigid support ring, 6.valve body, 7.second medium flow port, 8.valve core, 9.valve seat, 10.first medium flow port, 11.medium. DETAILED DESCRIPTION

[0023] For the convenience of description, if the words "up" and "down" appear in the present application, they only mean the same as the up and down directions of the drawings themselves, and do not limit the structure, but only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation on the present application.

[0024] Embodiment 1

[0025] This embodiment provides a floating rigid support bellows seal valve, as shown in Figure 1As shown, the valve housing is provided with a valve rod 1 which can move along its own axis direction, in this embodiment, the valve housing comprises a valve body 6 and a valve cover 2 which is arranged at the open end of the valve body 6 so that the valve body 6 and the valve cover 2 form a closed cavity.

[0026] Specifically, the valve cover 2 is provided with a ring-shaped positioning block at the end connected with the valve body 6, and correspondingly, the valve body 6 is provided with a ring-shaped positioning groove matched with the positioning block at the end connected with the valve cover 2, the positioning block of the valve cover 2 is inserted into the positioning groove of the valve body 6, and the end surface of the valve cover 2 without the positioning block is welded or bonded with the valve body 6.

[0027] In other embodiments, the valve cover 2 and the valve body 6 can also be detachably fixed by flanges and bolts.

[0028] The valve rod 1 passes through the valve cover and extends into the valve body 6, and the valve rod 1 is in sliding connection with the valve cover 2 and can move along its own axis direction.

[0029] A bellows 3 is arranged between the valve housing and the valve rod 1, in this embodiment, the bellows 3 is arranged between the valve cover 2 and the valve rod 1, the top end of the bellows 3 is fixed with the valve rod 1, and the bottom end of the bellows 3 is fixed with the valve cover 2.

[0030] In other embodiments, the top end of the bellows 3 can be fixed with the valve cover 2, and the bottom end of the bellows 3 can be fixed with the valve rod 1.

[0031] The bellows 3 is fixed with the valve rod 1 and the valve cover 2 by welding, bonding or other sealing connection methods, which can be selected by those skilled in the art according to actual needs.

[0032] In this embodiment, the valve body 6 is provided with a valve seat 9 inside, which divides the internal space of the valve housing into a first space and a second space, wherein the bellows 3 is located in the first space, the lower end of the valve rod 1 extends into the second space through the opening of the valve seat, and the lower end of the valve rod is provided with a valve core 8.

[0033] The valve core 8 adopts a conical structure or a spherical structure or a hemispherical structure or other shapes, and correspondingly, the opening is matched with the shape of the valve core 8, so that the valve core 8 can block the opening.

[0034] The first space is provided with a first medium flow port 10 corresponding to the side of the valve body 6, for the medium 11 to flow into or out of the valve body 6, and the second space is provided with a second medium flow port 7 corresponding to the side of the valve body, for the medium 11 to flow into or out of the valve body 6.

[0035] The outer periphery of the bellows 3 is sleeved with an inner rigid support ring assembly, and the outer periphery of the inner rigid support ring assembly is sleeved with an outer rigid support ring assembly. In this embodiment, the inner rigid support ring assembly is an inner rigid support ring 4, and the outer rigid support ring assembly is an outer rigid support ring 5. The outer periphery of the bellows 3 is sleeved with the inner rigid support ring 4 and the outer rigid support ring 5, and the outer rigid support ring 5 is located at the outer periphery of the inner rigid support ring 4.

[0036] A plurality of inner rigid support rings 4 and outer rigid support rings 5 are arranged along the axis direction of the bellows 3.

[0037] The inner rigid support ring 4 and the outer rigid support ring 5 are made of a metal material. In this embodiment, the material of the inner rigid support ring 4 and the outer rigid support ring 5 is the same as the material of the bellows 3.

[0038] In other embodiments, the inner rigid support ring 4 and the outer rigid support ring 5 can also be made of a metal material with a similar elastic modulus to the bellows 3.

[0039] The inner annular surface of the inner rigid support ring 4 is an outer convex surface matched with the shape of the valleys of the bellows 3. The outer surface of the inner rigid support ring 4 at the valley position of the bellows 3 is attached by the outer convex surface. The upper surface of the inner rigid support ring 4 is attached to the outer surface between the valley and the peak above the valley. The lower surface of the inner rigid support ring 4 is attached to the outer surface between the valley and the peak below the valley.

[0040] In this embodiment, the outer periphery of all the valley positions of the bellows 3 is provided with an inner rigid support ring 4. In other embodiments, the outer periphery of selected valley positions can be provided with an inner rigid support ring 4.

[0041] The outer periphery of the inner rigid support ring is provided with an outer rigid support ring 5. The inner annular surface of the outer rigid support ring 5 is provided with an annular arc groove matched with the shape of the peaks of the bellows 3. The shape of the arc groove is matched with the shape of the peaks. The outer rigid support ring 5 is attached to the outer surface of the peak position of the bellows 3 by the arc groove. The outer annular surface of the outer rigid support ring 5 is attached to the inner surface of the valve cover 2, which plays a guiding and jointly pressure-bearing role.

[0042] In this embodiment, an outer rigid support ring 5 is arranged at each peak position of the bellows 3. In other embodiments, an outer rigid support ring 5 can be arranged at selected peak positions.

[0043] The inner diameter of the outer rigid support ring 5 is greater than the outer diameter of the inner rigid support ring 4, so that the inner annular surface of the outer rigid support ring 5 is gap-fitted with the outer annular surface of the inner rigid support ring 4. The distance therebetween meets the change requirement of the radial dimension of the bellows during stretching and contraction.

[0044] Preferably, the abutment positions of the adjacent outer rigid support rings 5 are staggered with the crest positions of the bellows 3.

[0045] The inner rigid support ring 4 is composed of a plurality of first ring blocks in the circumferential direction, and the plurality of first ring blocks are assembled into a ring structure, and the number of the first ring blocks is two or three or four or more, and in the embodiment, the number of the first ring blocks is four.

[0046] The outer rigid support ring 5 is composed of a plurality of second ring blocks in the circumferential direction, and the plurality of second ring blocks are assembled into a ring structure, and the number of the second ring blocks is two or three or four or more, and in the embodiment, the number of the second ring blocks is two.

[0047] The inner rigid support ring 4 and the outer rigid support ring 5 are composed of a plurality of ring blocks, which meet the floating requirements of the inner rigid support ring 4 and the outer rigid support ring 5 when the bellows generates radial deformation when the valve stem 1 moves up and down.

[0048] The bottommost outer rigid support ring 5 is supported by the part of the bellows 3 connected to the valve cover 2, thereby supporting all the outer rigid support rings 5, and the inner ring surface of the uppermost outer rigid support ring 5 is provided with a protruding part which is in contact with the top end surface of the bellows 3.

[0049] The working method of the valve in the embodiment is as follows:

[0050] When the valve is closed, the valve core 8 is tightly attached to the valve seat 9, and the opening on the valve seat 9 is blocked, and the bellows 3 is in the maximum stretching state, at this time, there is a gap between the adjacent outer rigid support rings 5, and the inner rigid support ring 4 is in contact with the outer rigid support ring 5, as the valve is opened, the valve core 8 is separated from the valve seat 9, the opening on the valve group is opened, the valve stem 1 moves downward, the valve stem 1 drives the bellows 3 to move downward and compress, and the stretching amount of the bellows 3 gradually decreases to the natural state or the compression state, at this time, the adjacent outer rigid support rings 5 are in contact and there is no gap, the inner rigid support ring 4 and the outer rigid support ring 5 are gap fitted, and the outer rigid support ring 5 is in contact with the valve cover 2. At this time, the inner rigid support ring 4 and the outer rigid support ring 5 are in contact with the bellows 3, which supports the bellows 3 and bears the pressure from the fluid medium together.

[0051] In this embodiment, during the valve opening and closing process, the inner rigid support ring 4 and the outer rigid support ring 5 can float along the axis of the bellows 3 with a certain amplitude as the valve stem 1 moves. The inner rigid support ring 4 and the outer rigid support ring 5 do not restrict the axial displacement of the bellows 3, ensuring that the valve opening is adjusted smoothly. The gap reserved between the inner rigid support ring 4 and the outer rigid support ring 5, and between adjacent outer rigid support rings 5, needs to be calculated based on the valve opening and the machining accuracy of the bellows 3, the inner rigid support ring 4, and the outer rigid support ring 5. The size of the gap is crucial. When the bellows 3 is subjected to large internal pressure and generates radial displacement, the inner rigid support ring 4 and the outer rigid support ring 5 cannot provide effective support for the bellows 3. If the gap is too small, the bellows 3 will be restricted by the outer rigid support ring 5 and the inner rigid support ring 4 when it generates axial displacement, indirectly affecting the adjustment of the valve opening.

[0052] The valve in this embodiment uses an inner rigid support ring 4 and an outer rigid support ring 5 to support the bellows 3. No filler is used, so there is no problem with the flow of filler. The rigid floating support is not affected by the change in the volume of the filling cavity, and can provide better support for the bellows.

[0053] Example 2

[0054] This embodiment provides a bellows-sealed valve with floating rigid support, such as Figure 2 As shown, the valve includes a valve housing, which includes a valve body 6 and a valve cover 2. The valve cover 2 is located at the open end of the valve body 6. The connection method between the valve body 6 and the valve cover 2 is the same as in Embodiment 1, and will not be repeated here.

[0055] The valve stem 1 passes through the valve cover 2 and extends into the valve body 6. The valve stem 1 is slidably connected to the valve cover 2 and can move linearly along its own axis.

[0056] A bellows 3 is provided between the valve stem 1 and the valve body 6. The top end of the bellows 3 is fixed to the inner side of the valve body 6 by welding or bonding. The bottom end of the bellows 3 is fixed to the valve stem 1 by welding or bonding.

[0057] The valve body 6 is provided with a valve seat 9, which has an opening. Correspondingly, the bottom end of the valve stem 1 is provided with a valve core 8 that cooperates with the opening. The valve core is located above the opening. The structure of the valve core 8 is the same as that of Embodiment 1. The shape of the opening matches the shape of the valve core 8. The linear up-and-down movement of the valve stem 1 can realize the opening and closing of the opening.

[0058] The valve seat 9 separates the space in the valve shell into a first space and a second space, wherein the bellows 3 is located in the first space, the first space is provided with a first medium flow port 10 on the side of the valve body 6, for the inflow or outflow of the medium 11, and the second space is provided with a second medium flow port 7 on the side of the valve body 6, for the inflow or outflow of the medium 11.

[0059] The bellows 3 is provided with a plurality of inner rigid support ring assemblies and outer rigid support ring assemblies in the axial direction, the inner rigid support ring assembly is composed of an inner rigid support ring 4, and the outer rigid support ring assembly is composed of an outer rigid support ring 5, and the outer rigid support ring 5 is located outside the inner rigid support ring 4.

[0060] The outer ring surface of the outer rigid support ring 5 is an outer convex surface matched with the shape of the bellows 3, the outer rigid support ring 5 is matched with the inner surface of the bellows 3 at the position of the bellows crest through the outer convex surface, the upper surface of the outer rigid support ring 5 is matched with the inner surface at the position between the bellows crest and the bellows crest above, and the lower surface of the outer rigid support ring 5 is matched with the inner surface at the position between the bellows crest and the bellows crest below.

[0061] The outer ring surface of the inner rigid support ring 4 is provided with an annular arc groove matched with the shape of the bellows 3, and the inner surface of the bellows 3 at the position of the bellows trough is matched through the arc groove, and the inner ring surface of the inner rigid support ring 4 is matched with the valve stem 1.

[0062] Preferably, the junction positions of adjacent inner rigid support rings 4 are staggered with the bellows trough of the bellows 3 in the axial direction of the bellows 3.

[0063] In the embodiment, all the bellows crests and troughs of the bellows 3 are matched with the inner rigid support ring 4 and the outer rigid support ring 5, or the inner rigid support ring 4 and the outer rigid support ring 5 are arranged at selected bellows crests and troughs.

[0064] The outer ring surface diameter of the inner rigid support ring 4 is smaller than the diameter of the inner ring surface of the outer rigid support ring 5, so that the inner rigid support ring 4 is matched with the outer rigid support ring 5. The distance between the outer rigid support ring 5 and the inner rigid support ring 4 meets the radial size change requirement when the bellows 3 stretches and contracts.

[0065] The inner rigid support ring 4 at the bottom end is in contact with the inner surface of the connection part between the bellows 3 and the valve stem 1, and the connection part supports the inner rigid support ring 4, thereby supporting the plurality of inner rigid support rings 4.

[0066] The outer ring surface of the inner rigid support ring 4 at the top end is provided with a protruding part, which is located above the connection part between the bellows 3 and the valve body 6 and is matched with the connection part.

[0067] In this embodiment, the outer rigid support ring 5 is composed of a plurality of first ring blocks distributed along the ring direction, the number of first ring blocks is two or three or four or more, and in this embodiment, the number of first ring blocks is four.

[0068] The inner rigid support ring 4 is composed of a plurality of second ring blocks distributed along the ring direction, the number of second ring blocks is two or three or four or more, and in this embodiment, the number of first ring blocks is two.

[0069] With this arrangement, the radial size change requirement of the bellows 3 during extension and contraction is met, and the inner rigid support ring 4 and the outer rigid support ring 5 will not interfere with the extension and contraction movement of the bellows.

[0070] The working method of the valve of this embodiment is as follows:

[0071] When the valve is closed, the valve core 8 is tightly sealed with the valve seat 9, the opening is closed, and the bellows 3 is in the maximum stretched state. At this time, there is a gap between the inner rigid support rings 4, and the inner rigid support ring 4 and the outer rigid support ring 5 are in close contact. As the valve is gradually opened, the valve core 8 is separated from the valve seat 9, the valve stem 1 moves upward, the valve stem 1 drives the bellows 3 to move upward and compress, and the stretching amount of the bellows 3 gradually decreases to the natural state or the compressed state. At this time, the inner rigid support ring 4 is in close contact without a gap, the inner rigid support ring 4 and the outer rigid support ring 5 are in gap cooperation, and the inner rigid support ring 4 is in close contact with the valve stem 1. At this time, the inner rigid support ring 4 and the outer rigid support ring 5 are in close contact with the bellows 3, which plays a supporting role for the bellows 3 and jointly bears the pressure from the fluid medium.

[0072] During the opening and closing of the valve, the inner rigid support ring 4 and the outer rigid support ring 5 can move with the valve stem 1 within a certain amplitude and are in a floating state. The inner rigid support ring 4 and the outer rigid support ring 5 will not limit the axial displacement of the bellows 3, ensuring smooth adjustment of the valve opening. The size of the gap between the inner rigid support ring 4 and the outer rigid support ring 5 and between adjacent inner rigid support rings 4 needs to be calculated according to the valve opening and the machining precision of the bellows 3, the inner rigid support ring 4, and the outer rigid support ring 5. If the gap is too large, the bellows 3 will produce radial displacement when it bears a large internal pressure, and the inner rigid support ring 4 and the outer rigid support ring 5 cannot effectively support the bellows 3. If the gap is too small, the bellows 3 will be restricted by the inner rigid support ring 4 and the outer rigid support ring 5 when it produces axial displacement, which indirectly affects the adjustment of the valve opening.

[0073] The valve of this embodiment uses the inner rigid support ring 4 and the outer rigid support ring 5 to support the bellows 3, does not use fillers, and does not have the flow problem of fillers. The rigid floating support will not be affected by the volume change of the filler cavity, and can better provide support for the bellows 3.

[0074] Embodiment 3

[0075] Compared with the embodiment 1, the only difference is that the inner rigid support ring assembly in the embodiment is composed of a plurality of coaxially sleeved inner rigid support rings 4, the outer rigid support ring assembly is composed of a plurality of coaxially sleeved outer rigid support rings 5, and other structures are the same as those of the embodiment 1, which will not be described in detail here.

[0076] Embodiment 4

[0077] Compared with the embodiment 2, the only difference is that the inner rigid support ring assembly in the embodiment is composed of a plurality of coaxially sleeved inner rigid support rings 4, the outer rigid support ring assembly is composed of a plurality of coaxially sleeved outer rigid support rings 5, and other structures are the same as those of the embodiment 1, which will not be described in detail here.

[0078] Although the specific embodiments of the present application are described above with reference to the drawings, the description is not a limitation on the scope of protection of the present application, and those skilled in the art should understand that various modifications or changes made on the basis of the technical solutions of the present application without creative labor are still within the scope of protection of the present application.

Claims

1. A rigid floating support bellows-sealed valve, comprising a valve body, a valve stem disposed within the valve body, and a bellows disposed within the valve body, one end of the bellows being fixed to the valve body and the other end being fixed to the valve stem, characterized in that, The corrugated pipe is provided with an inner rigid support ring assembly and an outer rigid support ring assembly. The inner rigid support ring assembly is in contact with the outer surface of the corrugated pipe at the trough and between the trough and the crest. The outer rigid support ring assembly is located on the outer periphery of the inner rigid support ring assembly. The inner ring surface of the outer rigid support ring assembly is in contact with the outer surface of the corrugated pipe at the crest. The outer rigid support ring assembly and the inner rigid support ring assembly are in clearance fit.

2. The bellows-sealed valve with rigid floating support as described in claim 1, characterized in that, The inner ring surface of the inner rigid support ring assembly is a convex surface, which fits against the outer surface of the corrugated pipe at the trough position.

3. The bellows-sealed valve with rigid floating support as described in claim 1, characterized in that, The inner ring surface of the outer rigid support ring assembly has an annular arc groove, and it fits against the outer surface of the bellows crest position through the circumferential arc groove.

4. The bellows-sealed valve with rigid floating support as described in claim 1, characterized in that, Along the axial direction of the bellows, the junction of adjacent outer rigid support ring assemblies is staggered from the crest position of the bellows.

5. A rigid floating support bellows-sealed valve, comprising a valve body, a valve stem disposed within the valve body, and a bellows disposed within the valve body, one end of the bellows being fixed to the valve body and the other end being fixed to the valve stem, characterized in that, The bellows is equipped with an inner rigid support ring assembly and an outer rigid support ring assembly. The outer rigid support ring assembly is in contact with the inner surface of the bellows at the crests and troughs. The outer ring surface of the inner rigid support ring assembly is in contact with the inner surface of the bellows at the troughs. The outer rigid support ring assembly is located on the outer periphery of the inner rigid support ring assembly and is clearance-fitted.

6. A bellows-sealed valve with rigid floating support as described in claim 5, characterized in that, The outer ring surface of the external rigid support ring assembly is a convex surface, which fits against the inner surface of the corrugated pipe at the crest position.

7. A bellows-sealed valve with rigid floating support as described in claim 5, characterized in that, The outer ring surface of the inner rigid support ring assembly has an annular arc groove, and the annular arc groove fits against the inner surface at the trough of the bellows.

8. A bellows-sealed valve with rigid floating support as described in claim 5, characterized in that, Along the axial direction of the bellows, the junction of adjacent inner rigid support ring assemblies is staggered from the trough of the bellows.

9. A bellows-sealed valve with rigid floating support as described in claim 1 or 5, characterized in that, The inner rigid support ring assembly consists of at least one inner rigid support ring. The inner rigid support ring is a ring structure composed of multiple first ring blocks along the circumferential direction. When the inner rigid support ring assembly consists of multiple inner rigid support rings, the multiple inner rigid support rings are coaxially sleeved together.

10. A bellows-sealed valve with rigid floating support as described in claim 1 or 5, characterized in that, The outer rigid support ring assembly consists of at least one outer rigid support ring. The outer rigid support ring is a ring structure composed of multiple second ring blocks along the ring direction. When the outer rigid support ring assembly consists of multiple outer rigid support rings, the multiple outer rigid support rings are coaxially sleeved together.

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