Three-eccentric center butterfly valve with cryogenic anti-deformation lining support

Abstract

The utility model discloses a three-eccentric center butterfly valve with a cryogenic anti-deformation lining support, and particularly relates to the technical field of butterfly valves, which comprises a valve body, a support fixedly connected to the top of the valve body, a shell fixedly connected to the top of the support, a rotating handle rotatably connected to one side of the shell, a worm fixedly connected to one section of the rotating handle, and the outer side of the worm is rotatably connected to the inner side of the shell. One side of the worm is meshed with a turbine, the inner side of the turbine is fixedly connected with a valve rod, the outer side of the valve rod is rotatably connected with the inner side of the shell, one side of the valve body is fixedly connected with a pressing plate, and the outer side of the pressing plate is in threaded connection with a plurality of screws. The metal net and cavity combined structure is adopted, low-temperature shrinkage stress is effectively dispersed, the corrugated grooves and the corrugated strips are matched, the anti-pressure capacity of the sealing ring is enhanced, and the sealing stability under the low-temperature working condition is ensured; multiple sealing layers are formed through the rubber ring and the double grooves, the stress concentration problem of a connecting gap is solved, and the sealing reliability between the valve body and a pipeline is improved.

Description

Technical Field

[0001] This utility model relates to the field of butterfly valve technology, and more specifically, to a triple-eccentric butterfly valve with cryogenic deformation-resistant lining support. Background Technology

[0002] A butterfly valve, also known as a flap valve, is a simple shut-off and regulating valve. The closing element (valve disc or butterfly plate) is a round plate that rotates around the valve shaft to open and close. Butterfly valves are simple in structure, small in size, and lightweight, consisting of only a few parts. They can be quickly opened and closed with just a 90° rotation, making them easy to operate. Furthermore, these valves have excellent fluid control characteristics.

[0003] Existing traditional butterfly valves, whether centerline, double eccentric, or triple eccentric, have structural limitations. When the butterfly valve is fully open, its disc and valve shaft are still in the middle of the valve body flow channel. The disc obstructs the medium from passing through the middle of the flow channel, and the thickness of the disc causes the butterfly valve to generate a large flow resistance. Secondly, the sealing structure of traditional butterfly valves is limited, and the diameter of the valve seat flow channel is smaller than the inner diameter of the pipe, which also generates a corresponding flow resistance.

[0004] A search revealed that Chinese Patent CN213929468U discloses a full-flow-channel, triple-eccentric metal-lined sealing butterfly valve. When the butterfly plate is fully open, it is positioned within a recessed cavity, creating a fully open flow channel. The full-flow-channel design, with the inner diameter of the flow channel matching the pipe diameter, ensures that the butterfly plate pressure ring and sealing ring do not obstruct the flow of media when the butterfly plate is fully open. This results in near-zero flow resistance, a low flow resistance coefficient, and a low pressure drop.

[0005] However, in actual use, under cryogenic conditions, the sealing ring inside the valve body deforms and rebounds slowly after coming into contact with colder fluids, resulting in gaps between the valve plate and the sealing surface of the sealing ring, thus causing incomplete sealing. Utility Model Content

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides a triple eccentric butterfly valve with cryogenic deformation-resistant lining support to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A triple eccentric butterfly valve with cryogenic deformation-resistant lining support includes a valve body. A bracket is fixedly connected to the top of the valve body, and a housing is fixedly connected to the top of the bracket. A handle is rotatably connected to one side of the housing, and a worm gear is fixedly connected to one end of the handle. The outer side of the worm gear is rotatably connected to the inner side of the housing. A turbine is engaged with one side of the worm gear, and a valve stem is fixedly connected to the inner side of the turbine. The outer side of the valve stem is rotatably connected to the inner side of the housing. A pressure plate is fixedly connected to one side of the valve body, and multiple screws are threaded onto the outer side of the pressure plate. An opening and closing sealing mechanism is provided inside the valve body. The valve body has a sealing ring fixedly connected to its inner side, a metal mesh fixedly connected to its inner side, and multiple cavities with a honeycomb cross-section on the inner side of the metal mesh. The cavities are arranged in a ring array on the inner side of the sealing ring. A corrugated strip is fixedly connected to the inner side of the sealing ring. Two positioning blocks are fixedly connected to the outer side of the valve stem. A valve plate is fixedly connected to one side of each positioning block. A sealing ring is fixedly connected to the outer side of the valve plate. A corrugated groove is formed on the outer side of the sealing ring. The inner side of the corrugated groove engages with the outer side of the corrugated strip. A filling mechanism is provided on the outer side of the valve body.

[0009] By adopting the above technical solution, the sealing ring is effectively supported by the metal mesh and cavity inside the sealing ring, and good resilience is provided. The valve plate and sealing ring are improved in a cryogenic environment by the staggered fit of the corrugated strips and corrugated grooves.

[0010] As a further description of the above technical solution: the filling mechanism includes two rubber rings, one side of which is fixedly connected to the outside of the valve body, and multiple reinforcing ribs are fixedly connected to the outside of the rubber rings. One side of each reinforcing rib is fixedly connected to the outside of the valve body, and two grooves are formed on one side of the rubber rings.

[0011] By adopting the above technical solution, two rubber rings and grooves are used to seal the connection surface between the valve body and the external pipeline in layers, thus maintaining good sealing performance.

[0012] The technical effects and advantages of this utility model are as follows:

[0013] 1. By setting up an opening and closing sealing mechanism, compared with the existing technology, the metal mesh and cavity are used to make the sealing ring maintain good pressure resistance when it is squeezed in a cryogenic environment, and disperse the low temperature shrinkage stress. The corrugated groove and corrugated strip are interlocked to make the triple eccentric butterfly valve maintain good sealing performance and operational stability in a cryogenic environment.

[0014] 2. By setting a filling mechanism, compared with the existing technology, multiple independent sealing layers are formed at the connection gap between the valve body and the external pipeline using a rubber ring and two grooves, avoiding single-point stress concentration, thereby improving the sealing performance of the valve body. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the rear structure of this utility model.

[0017] Figure 3 This is a partial schematic diagram of the connection between the valve body and the sealing ring of this utility model.

[0018] Figure 4 This is a partial schematic diagram of the connection between the valve stem and the positioning block of this utility model.

[0019] Figure 5 This is a partial schematic diagram of the connection between the sealing ring and the corrugated strip of this utility model.

[0020] Figure 6 For the present utility model Figure 3 Enlarged diagram of A in the middle.

[0021] The attached figures are labeled as follows: 1. Valve body; 2. Bracket; 3. Housing; 4. Throttle; 5. Worm gear; 6. Turbine; 7. Valve stem; 8. Pressure plate; 9. Screw; 10. Sealing ring; 11. Metal mesh; 12. Corrugated strip; 13. Positioning block; 14. Valve plate; 15. Sealing ring; 16. Corrugated groove; 17. Rubber ring; 18. Reinforcing rib; 19. Groove; 20. Cavity. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] The embodiments disclosed in this application are as follows: Figure 1-6The illustrated triple eccentric butterfly valve with cryogenic deformation-resistant lining support includes a valve body 1, a bracket 2 fixedly connected to the top of the valve body 1, a housing 3 fixedly connected to the top of the bracket 2, a handle 4 rotatably connected to one side of the housing 3, a worm gear 5 fixedly connected to one end of the handle 4, the outer side of the worm gear 5 rotatably connected to the inner side of the housing 3, a turbine 6 meshing with one side of the worm gear 5, a valve stem 7 fixedly connected to the inner side of the turbine 6, the outer side of the valve stem 7 rotatably connected to the inner side of the housing 3, a pressure plate 8 fixedly connected to one side of the valve body 1, multiple screws 9 threadedly connected to the outer side of the pressure plate 8, an opening and closing sealing mechanism provided inside the valve body 1, a sealing ring 10 fixedly connected to the inner side of the valve body 1, a metal mesh 11 fixedly connected to the inner side of the sealing ring 10, multiple cavities 20 opened inside the metal mesh 11, and the cross-section of the cavity 20... The valve body 1 has a honeycomb-shaped cavity 20 arranged in a ring array inside the sealing ring 10. A corrugated strip 12 is fixedly connected to the inner side of the sealing ring 10. Two positioning blocks 13 are fixedly connected to the outer side of the valve stem 7. A valve plate 14 is fixedly connected to one side of the positioning block 13. A sealing ring 15 is fixedly connected to the outer side of the valve plate 14. A corrugated groove 16 is opened on the outer side of the sealing ring 15. The inner side of the corrugated groove 16 is engaged with the outer side of the corrugated strip 12. A filling mechanism is provided on the outer side of the valve body 1. The metal mesh 11 inside the sealing ring 10 provides anti-deformation support for the sealing ring 10. The sealing ring 10 rebounds after being squeezed by multiple cavities 20. The corrugated groove 16 on the outer side of the sealing ring 15 is staggered and fitted with the corrugated strip 12, thereby improving the sealing performance between the valve plate 14 and the sealing ring 10.

[0024] Reference Figure 3 and Figure 6 As shown, the filling mechanism includes two rubber rings 17. One side of the rubber ring 17 is fixedly connected to the outside of the valve body 1. Multiple reinforcing ribs 18 are fixedly connected to the outside of the rubber ring 17. One side of the reinforcing ribs 18 is fixedly connected to the outside of the valve body 1. Two grooves 19 are opened on one side of the rubber ring 17. By utilizing the compression deformation of the rubber ring 17 and the grooves 19 between the valve body 1 and the external pipeline, the rubber ring 17 and the grooves 19 can form a multi-layer seal.

[0025] The working principle of this utility model is as follows: During the installation of the triple eccentric butterfly valve, two rubber rings 17 on both sides of the valve body 1 fit against the connecting flange of the external pipeline. During the compression process between the valve body 1 and the external pipeline, the rubber rings 17 deform and fill the gap between the valve body 1 and the external pipeline. Through the two grooves 19, the sealing surface of the rubber rings 17 becomes multi-layered. Then, when the triple eccentric butterfly valve is used in a cryogenic environment, the handle 4 is first turned to drive the worm gear 5 to rotate. The worm gear 5 drives the turbine 6 to engage and transmit power. Then, the turbine 6 drives the valve stem 7 to engage with the two positioning blocks 13. The valve plate 14 rotates, and the sealing ring 15 on the outer side of the valve plate 14 separates from the sealing ring 10 on the inner side of the valve body 1 as the valve plate 14 rotates, so that the triple eccentric butterfly valve opens to transport materials. Then, when the triple eccentric butterfly valve closes, the valve plate 14 drives the sealing ring 15 and the corrugated groove 16 to deflect. The corrugated groove 16 interlaces and fits the corrugated strip 12 on the inner side of the sealing ring 10. The cavity 20 and the metal mesh 11 inside the sealing ring 10 make the sealing ring 10 have strong pressure resistance and can rebound quickly, maintaining the sealing performance between the sealing ring 10 and the sealing ring 15. Finally, the triple eccentric butterfly valve can be opened and closed in a cryogenic environment.

[0026] All contents not described in detail in the specification are existing technologies known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited; conventional equipment can be used. Electrical control components not mentioned in this technical solution are not shown in the figures because they are existing technologies, and will not be described here.

[0027] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A triple eccentric butterfly valve with cryogenic deformation-resistant lining support, comprising a valve body (1), characterized in that: A bracket (2) is fixedly connected to the top of the valve body (1), and a housing (3) is fixedly connected to the top of the bracket (2). A handle (4) is rotatably connected to one side of the housing (3). A worm (5) is fixedly connected to one end of the handle (4). The outer side of the worm (5) is rotatably connected to the inner side of the housing (3). A turbine (6) is meshed on one side of the worm (5). A valve stem (7) is fixedly connected to the inner side of the turbine (6). The outer side of the valve stem (7) is rotatably connected to the inner side of the housing (3). A pressure plate (8) is fixedly connected to one side of the valve body (1). Multiple screws (9) are threadedly connected to the outer side of the pressure plate (8). An opening and closing sealing mechanism is provided on the inner side of the valve body (1). A filling mechanism is provided on the outer side of the valve body (1).

2. The triple offset butterfly valve with support of cryogenic deformation resistant liner as claimed in claim 1 wherein: A sealing ring (10) is fixedly connected to the inner side of the valve body (1), and a metal mesh (11) is fixedly connected to the inner side of the sealing ring (10). Multiple cavities (20) are opened on the inner side of the metal mesh (11), and the cross-section of the cavity (20) is honeycomb.

3. The triple offset butterfly valve with cryogenic deformation resistant liner support of claim 2, wherein: The cavity (20) is arranged in a ring array inside the sealing ring (10), and a corrugated strip (12) is fixedly connected to the inside of the sealing ring (10).

4. The triple offset butterfly valve with support of cryogenic deformation resistant liner of claim 1, wherein: Two positioning blocks (13) are fixedly connected to the outside of the valve stem (7). A valve plate (14) is fixedly connected to one side of the positioning block (13). A sealing ring (15) is fixedly connected to the outside of the valve plate (14).

5. The triple offset butterfly valve with cryogenic deformation resistant liner support of claim 4, wherein: The sealing ring (15) has a corrugated groove (16) on its outer side, and the inner side of the corrugated groove (16) is engaged with the outer side of the corrugated strip (12).

6. The triple offset butterfly valve with support of cryogenic deformation resistant liner of claim 1, wherein: The filling mechanism includes two rubber rings (17), one side of which is fixedly connected to the outside of the valve body (1), and a plurality of reinforcing ribs (18) are fixedly connected to the outside of the rubber rings (17).

7. The triple offset butterfly valve with support of cryogenic deformation resistant liner of claim 1, wherein: The reinforcing rib (18) is fixedly connected to the outside of the valve body (1) on one side, and two grooves (19) are opened on one side of the rubber ring (17).

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