Butterfly valve with optimized sealing

Abstract

An outer ring is clamped by a second ring groove and a valve body, a second protruding ring extends into a first ring groove, a first protruding ring extends into a third ring groove, the bevel edge part of the trapezoidal cross section of an inner ring is exposed out of a fixing ring, and a step ring covers part of the top edge of the trapezoidal cross section of the inner ring; according to the sealing-optimized butterfly valve, the second ring groove of the fixing ring and the valve body clamp the outer ring, the second protruding ring stretches into the first ring groove so as to limit the inner ring, and the first protruding ring stretches into the third ring groove; in the process that the valve disc approaches from the inner side of the inner ring, the valve disc presses down the free end of the inner ring in the width direction, and the inner ring deforms to form a sealing effect; in the process that the valve disc approaches the outer side of the inner ring, the valve disc turns up the free end in the width direction of the inner ring to a certain degree, then the downward pressing action is completed, and in the process, the free end in the width direction of the inner ring cannot be excessively turned outwards through cooperation of the first protruding ring and the third ring groove, so that position abnormity is avoided.

Description

Technical Field

[0001] The utility model relates to the field of butterfly valves, and particularly relates to a butterfly valve with optimized sealing. Background Art

[0002] A butterfly valve is a kind of valve, and its working principle is to control the flow rate by rotating a disc-shaped butterfly plate in a pipeline. The butterfly plate of the butterfly valve is perpendicular to the axis of the pipeline. When the butterfly plate rotates, the pipeline can be opened or closed, thereby regulating the flow rate of the fluid. Due to its simple structure, small size, light weight, and fast opening and closing, this kind of valve is widely used in industrial pipeline systems.

[0003] Compared with other types of valves, due to the unique rotation characteristics of the butterfly valve, the interaction between the valve seat and the valve plate is very crucial. Specifically, half of the circumference of the sealing ring on the valve seat is under pressure, while the force on the other half of the circumference of the sealing ring is more complex. At this time, the state of the sealing ring has a greater impact on the working state of the entire butterfly valve. Summary of the Utility Model

[0004] The main purpose of the utility model is to provide a butterfly valve with optimized sealing, aiming to solve the problem that half of the circumference of the sealing ring on the valve seat is under pressure, while the force on the other half of the circumference of the sealing ring is more complex, so that the sealing ring is prone to abnormal operation.

[0005] To achieve the above purpose, the utility model provides a butterfly valve with optimized sealing, including:

[0006] A cylindrical valve body, with a stepped ring arranged on the inner circumference on one side in the thickness direction;

[0007] A valve seat, including a sealing ring and a fixing ring both in a ring shape. The sealing ring includes a connected inner ring and an outer ring with a plate-shaped cross-section. The cross-section of the inner ring is bent to be trapezoidal as a whole. A notch is arranged inward at the bottom edge of the cross-section of the inner ring to form a first ring groove. A first protruding ring protrudes from the free end of the cross-section of the inner ring. The fixing ring is provided with a second ring groove corresponding to the outer ring, a second protruding ring corresponding to the first ring groove, and a third ring groove corresponding to the first protruding ring. Among them, the second ring groove and the valve body clamp the outer ring, the second protruding ring extends into the first ring groove, the first protruding ring extends into the third ring groove, the hypotenuse part of the trapezoidal cross-section of the inner ring is exposed outside the fixing ring, and the stepped ring covers part of the top edge of the trapezoidal cross-section of the inner ring;

[0008] A valve disc, arranged offset from the valve seat in the thickness direction, and a fixing part is arranged on the side facing away from the valve disc;

[0009] A rotating shaft member, arranged on the inner circumference of the valve disc and hinged to the fixing part.

[0010] Further, a stainless steel layer is provided in the thickness direction of the sealing ring.

[0011] Further, a cavity ring is formed by enclosing the free end of the cross-section of the inner ring and the second protruding ring.

[0012] Further, the optimized-sealing butterfly valve further includes an auxiliary sealing ring, which is arranged in the cavity ring and is softer than the sealing ring.

[0013] Further, the fixing part includes an upper fixing sleeve and a lower fixing sleeve which are separately arranged.

[0014] Further, the rotating shaft member includes an upper fixing rod and a lower fixing rod which respectively form hinges corresponding to the upper fixing sleeve and the lower fixing sleeve.

[0015] Further, the upper fixing rod presses down the upper fixing sleeve, and the lower fixing rod supports the upper fixing sleeve.

[0016] Further, bolts are connected between the upper fixing rod and the upper fixing sleeve and between the lower fixing rod and the upper fixing sleeve.

[0017] Further, the rotating shaft member is arranged radially deviating from the valve disc.

[0018] Further, the fixing ring is connected to the valve body by a plurality of bolts.

[0019] For the optimized-sealing butterfly valve provided by the present utility model, the second groove of the fixing ring clamps the outer ring of the valve body, the second protruding ring extends into the first groove to limit the inner ring, and the first protruding ring extends into the third groove; when the valve disc approaches from the inner side of the inner ring, the valve disc presses down the free end in the width direction of the inner ring, and during this process, the inner ring deforms to form a sealing effect; when the valve disc approaches from the outer side of the inner ring, the valve disc turns up the free end in the width direction of the inner ring to a certain extent and then completes the pressing-down action. During this process, the cooperation between the first protruding ring and the third groove prevents the free end in the width direction of the inner ring from turning out too much and causing abnormal position. Description of the Drawings

[0020] Figure 1 is a schematic diagram of the optimized-sealing butterfly valve according to the first embodiment of the present utility model;

[0021] Figure 2 is a cross-sectional schematic diagram of the valve body in the optimized-sealing butterfly valve according to the first embodiment of the present utility model;

[0022] Figure 3 is Figure 2 a partial enlarged view in

[0023] Figure 4It is a cross-sectional view of the sealing ring in the butterfly valve with optimized sealing in the first embodiment of the present utility model;

[0024] Figure 5 It is Figure 4 a partial enlarged view of;

[0025] Figure 6 It is a cross-sectional view of the fixing ring in the butterfly valve with optimized sealing in the first embodiment of the present utility model;

[0026] Figure 7 It is Figure 6 a partial enlarged view in;

[0027] Figure 8 It is a cross-sectional view of the valve body in the butterfly valve with optimized sealing in the first embodiment of the present utility model;

[0028] Figure 9 It is Figure 8 a partial enlarged view in;

[0029] Figure 10 It is an installation diagram of the valve seat and the valve body in the butterfly valve with optimized sealing in the first embodiment of the present utility model.

[0030] The realization of the purpose, functional features and advantages of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Specific Embodiments

[0031] It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0032] Those skilled in the art of the present technology can understand that unless specifically stated otherwise, the singular forms "a", "an", "the", "above-mentioned" and "this" used herein may also include the plural forms. It should be further understood that the term "including" used in the description of the present utility model means that there are the described features, integers, steps, operations, elements, units, modules and / or components, but does not exclude the existence or addition of one or more other features, integers, steps, operations, elements, units, modules, components and / or their groups. It should be understood that when we say that an element is "connected" or "coupled" to another element, it can be directly connected or coupled to other elements, or there may also be intermediate elements. In addition, the "connection" or "coupling" used herein may include wireless connection or wireless coupling. The term "and / or" used herein includes all or any unit and all combinations of one or more related listed items.

[0033] Those skilled in the art will understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as the general understanding of ordinary technicians in the field to which the utility model belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as the meaning in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless specifically defined as here.

[0034] Reference Figures 1 to 10 In one embodiment of the utility model, a butterfly valve with optimized sealing includes:

[0035] The valve body 100 is cylindrical, and a step ring 110 is provided on the inner periphery of one side in the thickness direction;

[0036] The valve seat 200 includes a sealing ring 210 and a fixing ring 220, both of which are annular. The sealing ring 210 includes an inner ring 211 connected to each other and an outer ring 212 with a plate-shaped cross section. The cross section of the inner ring 211 is bent and the whole is trapezoidal. The bottom edge of the cross section of the inner ring 211 is provided with a notch inwardly to form a first ring groove 213. The free end of the cross section of the inner ring 211 is provided with a first protruding ring 214. The fixing ring 220 is provided with a second ring groove 221 corresponding to the outer ring 212 and a first ring groove 222 corresponding to the first ring groove 223. The ring groove 213 is provided with a second protruding ring 222 and a third ring groove 223 is provided corresponding to the first protruding ring 214, wherein the second ring groove 221 and the valve body 100 clamp the outer ring 212, the second protruding ring 222 extends into the first ring groove 213, the first protruding ring 214 extends into the third ring groove 223, the hypotenuse of the trapezoidal cross section of the inner ring 211 is exposed to the fixing ring 220, and the step ring 110 covers part of the top edge of the trapezoidal cross section of the inner ring 211;

[0037] The valve disc 310 is arranged away from the valve seat 200 in the thickness direction and a fixing portion 320 is arranged on a side away from the valve disc 310;

[0038] The rotating shaft 400 is disposed on the inner circumference of the valve disc 310 and is hinged to the fixing portion 320 .

[0039] In the prior art, due to the unique rotation characteristics of the butterfly valve, the interaction between the valve seat and the valve plate is very critical; specifically, half of the circumferential side of the sealing ring on the valve seat is subjected to pressure, while the other half of the circumferential side of the sealing ring is subjected to more complex forces. At this time, the state of the sealing ring has a greater impact on the working state of the entire butterfly valve.

[0040] A butterfly valve with optimized sealing provided by the utility model has a step ring 110 arranged on the inner circumference of one side in the thickness direction of a cylindrical valve body 100. The valve body 100, as the main structure of the entire butterfly valve, provides an installation foundation for each relevant component. The material of the valve body 100 is preferably various types of alloy steel materials.

[0041] The valve seat 200 includes an annular sealing ring 210 and a fixing ring 220, both of which are annular. The fixing ring 220 is used to fix the sealing ring 210 to the valve body 100. The sealing ring 210 includes an inner ring 211 and an outer ring 212 with a plate-shaped cross-section connected in the width direction. Specifically, the outer ring 212 is connected to the outer circumference of the inner ring 211. The cross-section of the inner ring 211 is bent to be trapezoidal as a whole, and a notch is provided inward at the bottom edge of the cross-section of the inner ring 211 to form a first ring groove 213. A first protruding ring 214 is protrudingly arranged at the free end of the cross-section of the inner ring 211. The fixing ring 220 is provided with a second ring groove 221 corresponding to the outer ring 212, a second protruding ring 222 corresponding to the first ring groove 213, and a third ring groove 223 corresponding to the first protruding ring 214. During the installation process, the second ring groove 221 and the valve body 100 clamp the outer ring 212, and the second protruding ring 222 extends into the first ring groove 213 to limit the inner ring 211. The first protruding ring 214 extends into the third ring groove 223. The hypotenuse part of the trapezoidal cross-section of the inner ring 211 is exposed outside the fixing ring 220, providing a foundation for the subsequent combination of the valve disc 310 and the sealing ring 210. The step ring 110 covers part of the top edge of the trapezoidal cross-section of the inner ring 211, thus providing a foundation for the elastic deformation of the inner ring 211.

[0042] The valve disc 310 is arranged offset from the valve seat 200 in the thickness direction, and a fixing part 320 is arranged on the side facing away from the valve disc 310. The rotating shaft member 400 is arranged on the inner circumference of the valve disc 310 and is hinged to the fixing part 320. During the rotation of the valve disc 310 based on the rotating shaft member 400, the valve disc 310 forms separation and combination with the sealing ring 210.

[0043] During use, when the valve disc 310 approaches from the inside of the inner ring 211, the valve disc 310 presses down the free end of the inner ring 211 in the width direction. During this process, the inner ring 211 deforms to form a sealing effect; when the valve disc 310 approaches from the outside of the inner ring 211, the valve disc 310 turns up the free end of the inner ring 211 in the width direction to a certain extent and then completes the pressing-down action. During this process, the cooperation between the first protruding ring 214 and the third ring groove 223 prevents the free end of the inner ring 211 in the width direction from turning outwards excessively and causing abnormal positions.

[0044] In summary, the second annular groove 221 of the fixing ring 220 clamps the outer ring 212 of the valve body 100, the second protruding ring 222 extends into the first annular groove 213 to limit the inner ring 211, and the first protruding ring 214 extends into the third annular groove 223; when the valve disc 310 approaches from the inner side of the inner ring 211, the valve disc 310 presses down the free end in the width direction of the inner ring 211. During this process, the inner ring 211 deforms to form a sealing effect; when the valve disc 310 approaches from the outer side of the inner ring 211, the valve disc 310 turns up the free end in the width direction of the inner ring 211 to a certain extent and then completes the pressing-down action. During this process, the cooperation between the first protruding ring 214 and the third annular groove 223 prevents the free end in the width direction of the inner ring 211 from turning out excessively and causing a position abnormality.

[0045] In one embodiment, a stainless steel layer is provided in the thickness direction of the sealing ring 210.

[0046] In this embodiment, in addition to forming an elastic effect through the structure of the cross-section of the outer ring 212, a stainless steel layer is provided in the thickness direction of the sealing ring 210. With the assistance of the stainless steel layer, the outer ring 212 can have more excellent elasticity during operation, especially the resilience towards the valve disc 310. The processing of the stainless steel layer can be completed synchronously during the forming process of the sealing ring 210, such as pre-filled injection molding.

[0047] Refer to Figures 8 to 9 In one embodiment, a cavity ring 224 is formed by enclosing the free end of the cross-section of the inner ring 211 and the second protruding ring 222.

[0048] In this embodiment, the second protruding ring 222 does not completely fit the inner ring 211 at the corresponding position. Specifically, a cavity ring 224 is formed by enclosing between the free end of the cross-section of the inner ring 211 and the second protruding ring 222. At this time, the cavity ring 224 can serve as a space for elastic deformation.

[0049] In one embodiment, the optimized-sealing butterfly valve further includes an auxiliary sealing ring, and the auxiliary sealing ring is disposed in the cavity ring 224 and is softer than the sealing ring 210.

[0050] In this embodiment, an auxiliary sealing ring is provided in the cavity ring 224 to support the sealing ring 210 and provide a basis for the deformation of the sealing ring 210 at the same time. Therefore, the quality of the auxiliary sealing ring should be softer than that of the sealing ring 210. The two can be of different materials with a hardness difference generated through a process; or the two are of different materials, thus generating a hardness difference.

[0051] In one embodiment, the fixing portion 320 includes an upper fixing sleeve and a lower fixing sleeve that are separately arranged.

[0052] In this embodiment, the fixing part 320 is provided in a split manner, which can reduce the consumption of materials on the premise of meeting the usage requirements.

[0053] In one embodiment, the rotating shaft member 400 includes an upper fixing rod and a lower fixing rod that are respectively hinged to the upper fixing sleeve and the lower fixing sleeve.

[0054] In this embodiment, corresponding to the upper fixing sleeve and the lower fixing sleeve, the rotating shaft member 400 is also provided in a split structure. Specifically, the upper fixing rod and the lower fixing rod can penetrate into the upper part and the lower part of the valve body 100 respectively. The fixing method between the upper fixing sleeve and the upper fixing rod can be bolt connection or circumferential clamping, etc.; the fixing method between the lower fixing sleeve and the lower fixing rod can be bolt connection or circumferential clamping, etc.

[0055] In one embodiment, the upper fixing rod presses down the upper fixing sleeve, and the lower fixing rod supports the upper fixing sleeve.

[0056] In this embodiment, the upper fixing rod presses down the upper fixing sleeve, and the lower fixing rod supports the upper fixing sleeve. Thus, the upper fixing rod and the lower fixing rod clamp the entire valve disc 310 to form auxiliary fixation. In the specific implementation process, a stepped structure is provided at the corresponding positions on the upper fixing rod and the lower fixing rod to realize the above-mentioned pressing and supporting actions.

[0057] In one embodiment, bolts are connected between the upper fixing rod and the upper fixing sleeve and between the lower fixing rod and the upper fixing sleeve.

[0058] In this embodiment, the fixing between the upper fixing rod and the upper fixing sleeve and the fixing between the lower fixing rod and the lower fixing sleeve are realized through bolt-like components.

[0059] In one embodiment, the rotating shaft member 400 is disposed radially offset from the valve disc 310.

[0060] In this embodiment, an additional eccentric effect is added to improve the effect between the valve disc 310 and the sealing ring 210. Specifically, the eccentric setting refers to the existing conventional setting, which is not specifically limited.

[0061] In one embodiment, the fixing ring 220 is connected to the valve body 100 through a plurality of bolts.

[0062] In this embodiment, a preferred fixing method for the fixing ring 220 is provided. The fixing ring 220 is connected to the valve body 100 by passing a plurality of bolts through the fixing ring 220. The number of bolts can be 4, 6 or 8 and is evenly arranged in the circumferential direction of the fixing ring 220.

[0063] In summary, for the butterfly valve with optimized sealing provided by the present utility model, the second groove 221 of the fixing ring 220 clamps the outer ring 212 with the valve body 100, and the second protruding ring 222 extends into the first groove 213 to limit the inner ring 211. The first protruding ring 214 extends into the third groove 223. When the valve disc 310 approaches from the inner side of the inner ring 211, the valve disc 310 presses down the free end in the width direction of the inner ring 211. During this process, the inner ring 211 deforms to form a sealing effect. When the valve disc 310 approaches from the outer side of the inner ring 211, the valve disc 310 turns up the free end in the width direction of the inner ring 211 to a certain extent and then completes the pressing-down action. During this process, the cooperation between the first protruding ring 214 and the third groove 223 prevents the free end in the width direction of the inner ring 211 from turning out too much and causing abnormal position.

[0064] The above are only the preferred embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present utility model.

Claims

1. A butterfly valve with optimized sealing, characterized in that, Comprising: A valve body (100) in a cylindrical shape, with a stepped ring (110) provided on the inner circumference on one side in the thickness direction; A valve seat (200), including an annular sealing ring (210) and a fixing ring (220) both being annular. The sealing ring (210) includes a connected inner ring (211) and an outer ring (212) with a plate-shaped cross-section. The cross-section of the inner ring (211) is bent to be trapezoidal as a whole. A notch is provided inward on the bottom edge of the cross-section of the inner ring (211) to form a first annular groove (213). A first protruding ring (214) is protrudingly provided at the free end of the cross-section of the inner ring (211). The fixing ring (220) is provided with a second annular groove (221) corresponding to the outer ring (212), a second protruding ring (222) corresponding to the first annular groove (213), and a third annular groove (223) corresponding to the first protruding ring (214). Wherein, the second annular groove (221) and the valve body (100) clamp the outer ring (212), the second protruding ring (222) extends into the first annular groove (213), the first protruding ring (214) extends into the third annular groove (223), the hypotenuse part of the trapezoidal cross-section of the inner ring (211) is exposed outside the fixing ring (220), and the stepped ring (110) covers part of the top edge of the trapezoidal cross-section of the inner ring (211); A valve disc (310), arranged offset from the valve seat (200) in the thickness direction, and a fixing part (320) is provided on the surface facing away from the valve disc (310); A rotating shaft member (400), arranged on the inner circumference of the valve disc (310) and hinged to the fixing part (320).

2. The butterfly valve with optimized sealing according to claim 1, characterized in that, A stainless steel layer is provided in the thickness direction of the sealing ring (210).

3. The butterfly valve with optimized sealing according to claim 1, characterized in that, A cavity ring (224) is formed by surrounding the free end of the cross-section of the inner ring (211) and the second protruding ring (222).

4. The butterfly valve with optimized sealing according to claim 3, characterized in that, The butterfly valve with optimized sealing further includes an auxiliary sealing ring, and the auxiliary sealing ring is arranged in the cavity ring (224), and the auxiliary sealing ring is softer than the sealing ring (210).

5. The butterfly valve with optimized sealing according to claim 1, characterized in that, The fixing part (320) includes an upper fixing sleeve and a lower fixing sleeve which are separately arranged.

6. The butterfly valve with optimized sealing according to claim 5, characterized in that, The rotating shaft member (400) includes an upper fixing rod and a lower fixing rod which respectively form hinges corresponding to the upper fixing sleeve and the lower fixing sleeve.

7. The butterfly valve with optimized sealing according to claim 6, characterized in that, The upper fixing rod presses down the upper fixing sleeve, and the lower fixing rod supports the upper fixing sleeve.

8. The butterfly valve with optimized sealing according to claim 7, characterized in that, Bolts are connected between the upper fixing rod and the upper fixing sleeve and between the lower fixing rod and the upper fixing sleeve.

9. The optimized-sealing butterfly valve according to any one of claims 1 to 8, characterized in that, The rotating shaft member (400) is arranged offset from the radial direction of the valve disc (310).

10. The butterfly valve with optimized sealing according to any one of claims 1 to 8, characterized in that, The fixing ring (220) is connected to the valve body (100) through a plurality of bolts.

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