Improved flange butterfly valve body casting

Abstract

The utility model belongs to the technical field of valve castings, and particularly relates to an improved flange butterfly valve body casting which comprises a valve body and a valve seat, valve rod flanges are symmetrically arranged at the two ends of the top of the valve body, valve body flanges are symmetrically arranged on the two sides of the valve body, and valve rod holes communicated with the valve body are formed in the valve rod flanges. Rib plates are arranged between the valve rod flanges and the valve body, a through hole is formed in the middle of the valve body, a first ring groove and a second ring groove are formed in the inner wall of the through hole and in the valve body, and the valve seat is clamped to the inner wall of the valve body through the first ring groove and the second ring groove. The butterfly plate can be quickly separated from the valve seat through double eccentric arrangement after a subsequent butterfly valve is opened, abrasion is reduced, the service life of the valve seat is prolonged, the first annular protrusion, the middle section and the second annular protrusion are matched with the first annular groove and the second annular groove, the valve seat is firmly installed on the valve body, and the service life of the valve seat is prolonged. And the sealing effect of the butterfly plate and the valve seat is guaranteed through the arrangement of the semi-ring grooves.

Description

Technical Field

[0001] The utility model belongs to the technical field of valve castings, and in particular relates to an improved flange butterfly valve body casting. Background Art

[0002] The butterfly valve is a regulating valve that can be used for the on-off control of low-pressure pipeline media. The butterfly valve's disc is a disc that rotates around the valve shaft in the valve body to open and close, and mainly plays the role of cutting off and throttling on the pipeline.

[0003] Common butterfly valves include flange butterfly valves, which can be quickly opened and closed by rotating 90°. They are easy to operate and have good fluid control characteristics. Some butterfly valves with separate valve seats and valve bodies are prone to loosening or displacement at the connection between the valve seat and the valve body after long-term use, which may cause leakage. In addition, the sealing effect between the valve seat and the butterfly plate and the sealing effect of the valve body as a whole need to be enhanced. Utility Model Content

[0004] Aiming at the deficiencies in the prior art, the utility model provides an improved flange butterfly valve body casting.

[0005] The utility model provides the following technical solutions:

[0006] An improved flange butterfly valve body casting includes a valve body and a valve seat, wherein valve stem flanges are symmetrically arranged at both ends of the top of the valve body, and valve body flanges are symmetrically arranged on both sides of the valve body, a valve stem hole connected to the valve body is arranged in the valve stem flange, and rib plates are arranged between the valve stem flange and the valve body, a through hole is opened in the middle of the valve body, and a first annular groove and a second annular groove are arranged on the inner wall of the through hole. The outer edge cross-section of the valve seat is I-shaped, and the valve seat is clamped on the inner wall of the valve body through the first annular groove and the second annular groove.

[0007] Furthermore, the center line of the valve stem hole does not coincide with the center line of the through hole.

[0008] Furthermore, the valve seat includes a first annular protrusion and a second annular protrusion, and an intermediate section is recessed inwardly between the first annular protrusion and the second annular protrusion.

[0009] Furthermore, a plurality of cylindrical protrusions are circumferentially distributed on a side of the second annular protrusion close to the middle section, and a semi-annular groove is symmetrically arranged on a side of the second annular protrusion close to the through hole.

[0010] Furthermore, the first annular protrusion is clamped in the first annular groove, the middle section is clamped in the second annular groove, and one side of the second annular protrusion is in contact with the inner wall of the valve body.

[0011] Furthermore, a step surface is provided in the middle of the valve stem hole, and a first sealing ring is installed on the step surface.

[0012] Furthermore, a sealing ring is installed at the opening of the valve stem hole, a flange is provided on the top edge of the sealing ring, and the flange is embedded in the valve stem flange.

[0013] Furthermore, a plurality of reinforcing ribs are provided on the valve body flange, and a square groove is formed on the reinforcing ribs.

[0014] Furthermore, a stopper is arranged on one side outside the through hole of the valve body, and the stopper is made of elastic alloy material.

[0015] The beneficial effects of the utility model are mainly reflected in:

[0016] 1) Through the setting of double eccentricity, the butterfly plate can quickly separate from the valve seat after the subsequent butterfly valve is opened, which greatly eliminates the unnecessary excessive extrusion and scraping between the butterfly plate and the valve seat, reduces the opening resistance, reduces wear, and increases the life of the valve seat;

[0017] 2) The first annular protrusion, the middle section and the second annular protrusion cooperate with the first annular groove and the second annular groove, so that the valve seat is firmly installed on the valve body and can be disassembled, and the setting of the semi-annular groove is conducive to ensuring the sealing effect between the butterfly plate and the valve seat;

[0018] 3) The setting of rib plates and reinforcing ribs is helpful to improve the strength and stability of the valve stem flange and valve body flange respectively;

[0019] 4) In addition, the provision of the first sealing ring and the sealing collar helps to improve the sealing performance of the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is the overall structure diagram of an improved flange butterfly valve body casting of the utility model;

[0021] Figure 2 It is an enlarged view of position A of the valve body casting of an improved flange butterfly valve of the utility model;

[0022] Figure 3 This is a front view of a valve seat of an improved flange butterfly valve body casting of the utility model;

[0023] Figure 4 The utility model is a partial cross-sectional view of a valve seat of an improved flange butterfly valve body casting.

[0024] The following are marked in the figure:

[0025] 1-valve body; 2-rib plate; 3-stopper; 4-valve body flange; 5-first annular groove; 6-second annular groove; 7-reinforcement rib; 8-valve stem flange; 9-valve stem hole; 10-sealing collar; 11-first sealing ring; 12-step surface; 13-valve seat; 14-first annular protrusion; 15-middle section; 16-second annular protrusion; 17-cylindrical protrusion; 18-semi-annular groove; 19-through hole. DETAILED DESCRIPTION

[0026] The following describes the specific implementation of the utility model in detail in conjunction with the accompanying drawings so that those skilled in the art can more clearly understand how to practice the utility model. Although the utility model is described in conjunction with its preferred specific embodiments, these embodiments are only illustrative, rather than limiting the scope of the utility model.

[0027] Combined with Figure 1-4 As shown, an improved flange butterfly valve body casting includes a valve body 1 and a valve seat 13, wherein valve stem flanges 8 are symmetrically arranged at both ends of the top of the valve body 1, and valve body flanges 4 are symmetrically arranged on both sides of the valve body 1, a valve stem hole 9 connected to the valve body 1 is arranged in the valve stem flange 8, and a rib plate 2 is arranged between the valve stem flange 8 and the valve body 1, and the rib plate 2 is centrally arranged to improve the strength and stability of the valve stem flange 8, a through hole 19 is opened in the middle of the valve body 1, and a first annular groove 5 and a second annular groove 6 are arranged on the inner wall of the through hole 19 on the valve body 1, and the outer edge cross-section of the valve seat 13 is I-shaped, and the valve seat 13 is clamped on the inner wall of the valve body 1 through the first annular groove 5 and the second annular groove 6.

[0028] Specifically, the center line of the valve stem hole 9 does not coincide with the center line of the through hole 19, that is, the axis of the valve stem hole 9 (valve stem) deviates from the center of the butterfly plate and the center of the valve body 1. The valve body 1 is a double eccentric butterfly valve. The double eccentricity effect enables the butterfly plate to quickly separate from the valve seat 13 after the valve is opened, thereby greatly eliminating unnecessary excessive extrusion and scraping between the butterfly plate and the valve seat 13.

[0029] Specifically, the valve seat 13 includes a first annular protrusion 14 and a second annular protrusion 16. The valve seat 13 is made of elastic materials such as rubber or polytetrafluoroethylene. An intermediate section 15 is recessed inwardly between the first annular protrusion 14 and the second annular protrusion 16. In addition, the thickness of the first annular protrusion 14 is less than the thickness of the second annular protrusion 16, and the edges at both ends of the first annular protrusion 14 are in a circular arc transition.

[0030] Specifically, a plurality of cylindrical protrusions 17 are circumferentially distributed on the second annular protrusion 16 near the middle section 15, and a circular groove corresponding to the cylindrical protrusion 17 is provided on the inner wall of the through hole 19 of the valve body 1. The cylindrical protrusion 17 is embedded in the circular groove, so as to further realize the connection and fixation between the valve seat 13 and the inner wall of the through hole 19 of the valve body 1. Semi-annular grooves 18 are symmetrically provided on the second annular protrusion 16 near the through hole 19, and the outer edge of the corresponding concave-convex structure is provided on the corresponding butterfly plate. The provision of the semi-annular groove 18 is conducive to ensuring the sealing effect between the butterfly plate and the valve seat 13, and also facilitates the butterfly plate to be able to separate from the valve seat 13 when the butterfly valve is opened and closed.

[0031] Specifically, the first annular protrusion 14 is clamped in the first annular groove 5, the middle section 15 is clamped in the second annular groove 6, and one side of the second annular protrusion 16 is in contact with the inner wall of the valve body 1, which helps to ensure that the valve seat 13 is firmly connected to the inner wall of the through hole 19 of the valve body 1 and is not easy to fall off.

[0032] Specifically, a step surface 12 is provided in the middle of the valve stem hole 9 , and a first sealing ring 11 is installed on the step surface 12 . The provision of the first sealing ring 11 helps to improve the sealing performance of the valve stem when it rotates in the valve stem hole 9 .

[0033] Specifically, a sealing ring 10 is installed at the opening of the valve stem hole 9, and a flange is provided on the top edge of the sealing ring 10, which is embedded in the valve stem flange 8, thereby ensuring the stable installation of the sealing ring 10 and greatly improving the sealing performance of the connection between the valve stem flange 8.

[0034] Specifically, a plurality of reinforcing ribs 7 are provided on the valve body flange 4 , and a square groove is opened on the reinforcing rib 7 . One end of the reinforcing rib 7 is connected to the outer wall of the through hole 19 of the valve body 1 , so as to improve the strength and stability of the valve body flange 4 .

[0035] Specifically, a stopper 3 is provided on one side outside the through hole 19 of the valve body 1. The stopper 3 is made of elastic alloy material. The setting of the stopper 3 is beneficial to controlling the position of the butterfly plate and avoiding excessive steering of the butterfly plate.

[0036] The specific working principle of the utility model is as follows:

[0037] The valve body 1 is a double eccentric butterfly valve. Through the effect of double eccentricity, the butterfly plate can quickly separate from the valve seat 13 after the butterfly valve is opened, and the unnecessary excessive extrusion and scraping between the butterfly plate and the valve seat 13 are greatly eliminated, the opening resistance is reduced, the wear is reduced, and the life of the valve seat 13 is increased. The first annular protrusion 14, the middle section 15 and the second annular protrusion 16 cooperate with the first annular groove 5 and the second annular groove 6, so that the valve seat 13 is firmly installed on the valve body 1, and the setting of the semi-annular groove 18 is conducive to ensuring the sealing effect between the butterfly plate and the valve seat 13, and it is also convenient for the butterfly plate to separate from the valve seat 13 when the butterfly valve is opened and closed.

[0038] At the same time, the provision of the rib plate 2 and the reinforcing rib 7 is respectively conducive to improving the strength and stability of the valve stem flange 8 and the valve body flange 4. In addition, the provision of the first sealing ring 11 and the sealing collar 10 is conducive to improving the sealing performance of the valve body 1.

[0039] The above is only a preferred implementation of the present invention, but the protection scope of the present invention is not limited thereto, and any modification and replacement based on the technical solution and inventive concept provided by the present invention should be included in the protection scope of the present invention.

Claims

1. An improved flange butterfly valve body casting, comprising a valve body (1) and a valve seat (13), characterized in that: The valve body (1) is symmetrically provided with valve stem flanges (8) at both ends of the top, and valve body flanges (4) are symmetrically provided on both sides of the valve body (1). A valve stem hole (9) connected to the valve body (1) is provided in the valve stem flange (8), and a rib plate (2) is provided between the valve stem flange (8) and the valve body (1). A through hole (19) is provided in the middle of the valve body (1), and a first annular groove (5) and a second annular groove (6) are provided on the inner wall of the through hole (19) on the valve body (1). The outer edge cross section of the valve seat (13) is in an I-shape, and the valve seat (13) is clamped on the inner wall of the valve body (1) through the first annular groove (5) and the second annular groove (6).

2. The improved flange butterfly valve body casting according to claim 1 is characterized in that: The center line of the valve stem hole (9) does not coincide with the center line of the through hole (19).

3. The improved flange butterfly valve body casting according to claim 1 is characterized in that: The valve seat (13) comprises a first annular protrusion (14) and a second annular protrusion (16), and an intermediate section (15) is provided inwardly recessed between the first annular protrusion (14) and the second annular protrusion (16).

4. The improved flange butterfly valve body casting according to claim 3 is characterized in that: A plurality of cylindrical protrusions (17) are circumferentially distributed on a side of the second annular protrusion (16) close to the middle section (15), and a semi-annular groove (18) is symmetrically arranged on a side of the second annular protrusion (16) close to the through hole (19).

5. The improved flange butterfly valve body casting according to claim 4 is characterized in that: The first annular protrusion (14) is clamped in the first annular groove (5), the middle section (15) is clamped in the second annular groove (6), and one side of the second annular protrusion (16) is in contact with the inner wall of the valve body (1).

6. The improved flange butterfly valve body casting according to claim 1 is characterized in that: A step surface (12) is provided in the middle of the valve stem hole (9), and a first sealing ring (11) is installed on the step surface (12).

7. The improved flange butterfly valve body casting according to claim 1 is characterized in that: A sealing collar (10) is installed at the opening of the valve stem hole (9), and a flange is provided on the top edge of the sealing collar (10), and the flange is embedded in the valve stem flange (8).

8. The improved flange butterfly valve body casting according to claim 1 is characterized in that: A plurality of reinforcing ribs (7) are provided on the valve body flange, and a square groove is formed on the reinforcing ribs (7).

9. The improved flange butterfly valve body casting according to claim 1 is characterized in that: A stopper (3) is provided on one side outside the through hole (19) on the valve body (1), and the stopper (3) is made of elastic alloy material.

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