Butterfly valve casting

Abstract

The utility model relates to valve technical field especially is involved in a butterfly valve casting, including valve body, valve seat, butterfly plate and valve rod, be equipped with the flow channel in the valve body, the valve seat and butterfly plate sealed cooperation are arranged in the valve body and will flow channel divide into import end and export end, the valve rod is connected with butterfly plate and is used for driving butterfly plate rotation in the valve body, the convex cambered surface is equipped on the end face of butterfly plate near export end one end, the concave cambered surface is equipped on the end face of butterfly plate near import end one end, still be equipped with several reinforcing ribs on the position of corresponding concave cambered surface of butterfly plate, form a reflux groove between every two adjacent reinforcing rib, every reinforcing rib is equipped with at least one reflux hole, every reflux hole is connected with adjacent two reflux grooves respectively, the butterfly plate of the utility model has the advantages that structural strength is high and production manufacturing cost is low.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a butterfly valve casting. Background Technology

[0002] A butterfly valve, also known as a flap valve, is a simple regulating valve that can be used for on / off control of low-pressure pipeline media. A butterfly valve is a type of valve in which the closing element (valve disc or butterfly plate) is a disc that rotates around the valve shaft to achieve opening and closing.

[0003] When a butterfly valve is closed, the butterfly plate and the valve seat are sealed together, and the end face of the butterfly plate will be impacted by the medium. Therefore, the butterfly plate needs high structural strength. Existing butterfly valves use thickened butterfly plates to increase structural strength, which leads to a significant increase in manufacturing costs.

[0004] The purpose of this invention is to propose corresponding solutions to the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide a butterfly valve casting. The butterfly plate of this invention has the advantages of high structural strength and low manufacturing cost.

[0006] The technical solution adopted by this utility model is as follows: A butterfly valve casting includes a valve body, a valve seat, a butterfly plate, and a valve stem. The valve body has a flow channel. The valve seat and the butterfly plate are sealed together in the valve body to divide the flow channel into an inlet end and an outlet end. The valve stem extends into the valve body and connects to the butterfly plate and is used to drive the butterfly plate to rotate. The end face of the butterfly plate near the outlet end has a convex arc surface, and the end face of the butterfly plate near the inlet end has a concave arc surface. The butterfly plate also has several reinforcing ribs at the position corresponding to the concave arc surface. A reflux groove is formed between each two adjacent reinforcing ribs. Each reinforcing rib has at least one reflux hole, and each reflux hole is connected to two adjacent reflux grooves.

[0007] The reflux holes on adjacent reinforcing ribs are staggered.

[0008] Several of the aforementioned reinforcing ribs are distributed at intervals along the axial direction of the valve stem.

[0009] The butterfly plate is also provided with a connecting post for connecting the valve stem. One side wall of the connecting post is located on a convex arc surface and the other side wall is located on a concave arc surface. Each of the reinforcing ribs extends to the connecting post, and the connecting post also divides several reflux grooves into two.

[0010] A cover ring is detachably connected to the butterfly plate, and a sealing ring is sandwiched between the cover ring and the butterfly plate. The butterfly plate is sealed to the valve seat through the sealing ring.

[0011] The sealing ring is made of elastic material. There is also an annular groove between the butterfly plate and the cover ring. The sealing ring is set in the annular groove and blocks the opening of the annular groove. One of the reinforcing ribs is also provided with a drainage channel. One end of the drainage channel is connected to the inlet end and the other end is connected to the annular groove.

[0012] The cover ring is connected to the butterfly plate by fasteners. The fasteners are used to adjust the width of the ring groove. When the distance between the cover ring and the butterfly plate is shortened, the sealing ring elastically deforms toward the valve seat.

[0013] The butterfly plate is a casting.

[0014] The beneficial effects of this utility model are as follows: The butterfly plate of this utility model has the advantages of high structural strength and low manufacturing cost. One side of the butterfly plate is a convex arc surface and the other side is a concave arc surface, which optimizes the fluid dynamics distribution, so that the impact force of the medium is evenly diffused along the arc surface, reducing local stress concentration. Multiple reinforcing ribs are set in the concave arc surface area, and the rigidity of the butterfly plate is significantly improved through the three-dimensional support structure. Under the same working conditions, the thickness of the butterfly plate can be reduced, which solves the problem of high material cost caused by traditional thickened butterfly plates. The return groove formed between adjacent reinforcing ribs and the return hole on the reinforcing ribs constitute a through pressure regulation network. When the medium impacts the concave arc surface, some fluid enters the adjacent return groove through the return hole, realizing real-time pressure balance between the impact zone and the back pressure zone. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0016] Figure 1 This is a structural schematic diagram of a butterfly valve casting according to the present invention; Figure 2 This is a schematic diagram of the butterfly plate in this utility model; Figure 3 This is a structural schematic diagram of the butterfly plate from another perspective in this utility model; Figure 4 This is a partial cross-sectional view of the annular groove in this utility model; In the figure, 1-valve body, 2-valve seat, 3-butterfly plate, 4-valve stem, 5-inlet end, 6-outlet end, 7-convex arc surface, 8-concave arc surface, 9-reinforcing rib, 10-return groove, 11-return hole, 12-connecting column, 13-cover ring, 14-sealing ring, 15-ring groove, 16-drainage channel, 17-fastener. Detailed Implementation

[0017] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0018] It should be noted that all uses of "first" and "second" in the embodiments of this utility model are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of this utility model. Subsequent embodiments will not explain this in detail.

[0019] The directional and positional terms used in this utility model, such as "up," "down," "front," "back," "left," "right," "inner," "outer," "top," "bottom," and "side," are merely for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.

[0020] like Figures 1 to 4 As shown, this is an embodiment of the present invention. A butterfly valve casting includes a valve body 1, a valve seat 2, a butterfly plate 3, and a valve stem 4. The valve body 1 has a flow channel. The valve seat 2 and the butterfly plate 3 are sealed together in the valve body 1, dividing the flow channel into an inlet end 5 and an outlet end 6. The valve stem 4 extends into the valve body 1 and connects to the butterfly plate 3, and is used to drive the butterfly plate 3 to rotate. The end face of the butterfly plate 3 near the outlet end 6 has a convex arc surface 7, and the end face of the butterfly plate 3 near the inlet end 5 has a concave arc surface 8. The butterfly plate 3 also has several reinforcing ribs 9 corresponding to the concave arc surface 8. A return groove 10 is formed between each two adjacent reinforcing ribs 9. Each reinforcing rib 9 has at least one return hole 11, and each return hole 11 is connected to two adjacent return grooves 10.

[0021] The beneficial effects of this design are as follows: the butterfly plate of this utility model has the advantages of high structural strength and low manufacturing cost. One side of the butterfly plate is a convex arc surface and the other side is a concave arc surface, which optimizes the fluid dynamics distribution, so that the impact force of the medium is evenly diffused along the arc surface, reducing local stress concentration. Multiple reinforcing ribs are set in the concave arc surface area, and the rigidity of the butterfly plate is significantly improved through the three-dimensional support structure. Under the same working conditions, the thickness of the butterfly plate can be reduced, which solves the problem of high material cost caused by traditional thickened butterfly plates. The return groove formed between adjacent reinforcing ribs and the return hole on the reinforcing ribs constitute a through pressure regulation network. When the medium impacts the concave arc surface, some fluid enters the adjacent return groove through the return hole, realizing real-time pressure balance between the impact zone and the back pressure zone.

[0022] Furthermore, the return holes 11 on adjacent reinforcing ribs 9 are arranged in an alternating pattern.

[0023] The beneficial effects of this design are as follows: the staggered return holes cause the medium to flow in multiple stages of change of direction between the return channels, decomposing the large-scale impact eddies into micro-scale turbulence. The kinetic energy is consumed through fluid self-friction, the intensity of the eddies is greatly reduced, and the impact of the medium is further reduced.

[0024] Furthermore, several of the reinforcing ribs 9 are distributed at intervals along the axial direction of the valve stem 4.

[0025] The beneficial effects of this design are as follows: the impact force of the medium is transmitted axially from the concave arc surface to the reinforcing rib to the valve stem, eliminating the torque shear effect of the traditional circumferential stiffener and greatly improving the stress transmission efficiency.

[0026] Furthermore, the butterfly plate 3 is also provided with a connecting post 12 for connecting the valve stem 4. One side wall of the connecting post 12 is located on the convex arc surface 7 and the other side wall is located on the concave arc surface 8. Each of the reinforcing ribs 9 extends to the connecting post 12. The connecting post 12 also divides several return channels 10 into two.

[0027] The beneficial effects of this design are as follows: the connecting post is embedded in both the convex and concave arc surfaces, and the valve stem torque is directly applied to the butterfly plate curvature change zone through the connecting post. Compared with the traditional central shaft hole connection method, the torque transmission efficiency is greatly improved. The reinforcing ribs, together with the connecting post, further improve the structural strength of the butterfly plate. The connecting post separates the return channels, doubling the number of return channels and shortening the length of the reinforcing ribs, thus significantly improving the structural strength of the reinforcing ribs.

[0028] Furthermore, a cover ring 13 is detachably connected to the butterfly plate 3, and a sealing ring 14 is sandwiched between the cover ring 13 and the butterfly plate 3. The butterfly plate 3 is sealed to the valve seat 2 through the sealing ring 14.

[0029] The advantages of this design are as follows: the butterfly plate achieves elastic sealing with the valve seat through the sealing ring, resulting in a better sealing effect and a self-compensating effect. Furthermore, the sealing ring is a vulnerable part, and it is installed on the butterfly plate through the cover ring, making it removable, which facilitates replacement and maintenance and reduces maintenance costs.

[0030] Furthermore, the sealing ring 14 is made of elastic material, and an annular groove 15 is provided between the butterfly plate 3 and the cover ring 13. The sealing ring 14 is disposed in the annular groove 15 and blocks the opening of the annular groove 15. One of the reinforcing ribs 9 is also provided with a drainage channel 16, one end of which is connected to the inlet end 5 and the other end is connected to the annular groove 15.

[0031] The beneficial effects of this design are as follows: the inlet channel allows the medium to flow in, and the medium impacts the sealing ring along the annular groove, pushing the sealing ring towards the valve seat, further improving the sealing performance between the sealing ring and the valve seat. The greater the medium pressure, the stronger the sealing performance, thus achieving dynamic sealing.

[0032] In a further configuration, the cover ring 13 is connected to the butterfly plate 3 by a fastener 17. The fastener 17 is used to adjust the width of the ring groove 15. When the distance between the cover ring 13 and the butterfly plate 3 is shortened, the sealing ring 14 elastically deforms toward the valve seat 2.

[0033] The beneficial effects of this design are as follows: In this embodiment, the fastener is a bolt, and the cover ring is connected to the butterfly plate by several bolts distributed circumferentially, which facilitates the adjustment of the distance between the cover ring and the butterfly plate. When the distance between the cover ring and the butterfly plate is reduced, the cover ring further compresses the sealing ring, causing the sealing ring to elastically deform toward the valve seat, which has the advantage of adjustable sealing performance.

[0034] Furthermore, the butterfly plate 3 is a casting.

[0035] The benefits of this design are as follows: optimized manufacturing costs, as the reinforcing ribs and reflux channels are integrally cast with the disc plate, eliminating the need for additional machining and reducing overall production costs.

[0036] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A butterfly valve casting, comprising a valve body (1), a valve seat (2), a butterfly plate (3), and a valve stem (4), wherein the valve body (1) has a flow channel, the valve seat (2) is sealed to the butterfly plate (3) and is disposed within the valve body (1) to divide the flow channel into an inlet end (5) and an outlet end (6), and the valve stem (4) extends into the valve body (1) and is connected to the butterfly plate (3) and is used to drive the butterfly plate (3) to rotate, characterized in that: The butterfly plate (3) has a convex arc surface (7) on the end face near the outlet end (6) and a concave arc surface (8) on the end face near the inlet end (5). The butterfly plate (3) also has several reinforcing ribs (9) at the position corresponding to the concave arc surface (8). A reflux groove (10) is formed between each two adjacent reinforcing ribs (9). Each reinforcing rib (9) has at least one reflux hole (11). Each reflux hole (11) is connected to two adjacent reflux grooves (10).

2. A butterfly valve casting according to claim 1, characterized in that: The return holes (11) on adjacent reinforcing ribs (9) are staggered.

3. A butterfly valve casting according to claim 1, characterized in that: Several of the reinforcing ribs (9) are distributed at intervals along the axial direction of the valve stem (4).

4. A butterfly valve casting according to claim 3, characterized in that: The butterfly plate (3) is also provided with a connecting column (12) for connecting the valve stem (4). One side wall of the connecting column (12) is located on the convex arc surface (7) and the other side wall is located on the concave arc surface (8). Each of the reinforcing ribs (9) extends to the connecting column (12). The connecting column (12) also divides several return channels (10) into two.

5. A butterfly valve casting according to claim 1, characterized in that: A cover ring (13) is detachably connected to the butterfly plate (3), and a sealing ring (14) is also sandwiched between the cover ring (13) and the butterfly plate (3). The butterfly plate (3) is sealed to the valve seat (2) through the sealing ring (14).

6. A butterfly valve casting according to claim 5, characterized in that: The sealing ring (14) is made of elastic material. An annular groove (15) is provided between the butterfly plate (3) and the cover ring (13). The sealing ring (14) is set in the annular groove (15) and blocks the opening of the annular groove (15). One of the reinforcing ribs (9) is also provided with a drainage channel (16). One end of the drainage channel (16) is connected to the inlet end (5) and the other end is connected to the annular groove (15).

7. A butterfly valve casting according to claim 6, characterized in that: The cover ring (13) is connected to the butterfly plate (3) by a fastener (17), which is used to adjust the width of the ring groove (15). When the distance between the cover ring (13) and the butterfly plate (3) is shortened, the sealing ring (14) elastically deforms toward the valve seat (2).

8. A butterfly valve casting according to claim 1, characterized in that: The butterfly plate (3) is a casting.

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