Arc surface sealing high-performance butterfly valve

Abstract

The utility model relates to the technical field of valves, and discloses an arc surface sealing high-performance butterfly valve which comprises a valve body, a choke plug is fixedly connected to the bottom of the valve body, a first sealing ring is installed in the valve body and tightly attached to one side of a butterfly valve plate, a pressing ring is fixedly connected to the interior of the valve body, and a second sealing ring is installed in the valve body and tightly attached to the other side of the butterfly valve plate. One side of the pressing ring is fixedly connected with a second sealing ring. The upper valve rod is driven to rotate by rotating the rotating disc of the turbine box, so that the butterfly valve plate is driven to open and close the valve body, when the valve body is closed, the butterfly valve plate is firstly extruded and attached to the surface of the first sealing ring at the moment, the valve body is closed, and when the butterfly valve plate extrudes the first sealing ring, the butterfly valve plate is tightly attached to the surface of the second sealing ring. The first sealing ring can extrude the second sealing ring, the sealing performance of the valve body is improved through the double-layer sealing effect of the first sealing ring and the second sealing ring, and leakage of the valve body is avoided.

Description

Technical Field

[0001] The utility model application relates to the technical field of valves, in particular to a high-performance butterfly valve with circular arc surface sealing. Background Art

[0002] The butterfly valve is a commonly used fluid control valve with a simple structure, small size, light weight, and the characteristics of fast switching and flow regulation. The butterfly valve is mainly composed of a valve body, a valve disc, a valve stem and a seal.

[0003] However, in the prior art, due to the structural characteristics of the butterfly valve, the sealing area between the valve disc and the valve seat is relatively small, which is prone to leakage problems. Especially under high pressure, high temperature or corrosive medium conditions, the leakage problem is more obvious. At the same time, the sealing surface between the valve disc and the valve seat is greatly affected by temperature changes. Temperature changes will cause the sealing surface to expand or contract, thereby affecting the sealing performance. Summary of the invention

[0004] In order to solve the problem that due to the structural characteristics of the butterfly valve, the sealing area between the valve disc and the valve seat is relatively small, which is prone to leakage, especially under high pressure, high temperature or corrosive medium conditions, the leakage problem is more obvious. At the same time, the sealing surface between the valve disc and the valve seat is greatly affected by temperature changes. Temperature changes will cause the sealing surface to expand or contract, thereby affecting the sealing performance. The utility model provides a high-performance butterfly valve with arc surface sealing to solve the above problems.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A high-performance butterfly valve with circular arc surface sealing comprises a valve body, a blind head is fixedly connected to the bottom of the valve body, a No. 1 sealing ring is installed inside the valve body, the No. 1 sealing ring is tightly fitted to one side of a butterfly valve plate, a pressure ring is fixedly connected inside the valve body, a No. 2 sealing ring is fixedly connected to one side of the pressure ring, the No. 2 sealing ring is tightly fitted to the pressure ring, and the cross-section of the No. 2 sealing ring is circular.

[0007] Furthermore, a No. 1 fixing bolt is provided on the surface of the blind head, the valve body and the blind head are fixedly connected via the No. 1 fixing bolt, the No. 1 fixing bolt is threadedly connected to the blind head, and the No. 1 fixing bolt is threadedly connected to the valve body.

[0008] Furthermore, a gasket is provided between the blind head and the valve body, and the gasket is tightly fitted to the blind head and the surface of the valve body.

[0009] Furthermore, a clamping ring is installed on the upper part of the blind head, the clamping ring is fixedly connected to the lower valve stem, and the lower valve stem is rotatably connected to the upper part of the blind head.

[0010] Furthermore, a shaft sleeve is fixedly connected to the upper portion of the valve body, and a turbine box is installed on the upper portion of the shaft sleeve.

[0011] Furthermore, an upper valve stem is rotatably connected to the bottom of the turbine box, one end of the upper valve stem is fixedly connected to the butterfly valve plate, and the lower part of the butterfly valve plate is fixedly connected to the lower valve stem.

[0012] Furthermore, a cylindrical pin is arranged on the surface of the butterfly valve plate, the cylindrical pin is plugged into the butterfly valve plate, and the cylindrical pin is plugged into the lower valve stem.

[0013] Furthermore, a No. 2 fixing bolt is provided on the surface of the pressure ring, the pressure ring and the valve body are fixedly connected by the No. 2 fixing bolt, the No. 2 fixing bolt is threadedly connected to the pressure ring, and the No. 2 fixing bolt is threadedly connected to the valve body.

[0014] Furthermore, a packing is arranged between the shaft sleeve and the upper valve stem.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. In the utility model, the upper valve stem is driven to rotate by rotating the turntable of the turbine box, thereby driving the butterfly valve plate to complete the opening and closing operation of the valve body. When the valve body is closed, the butterfly valve plate will first be squeezed and fitted with the surface of the No. 1 sealing ring to complete the closing of the valve body. When the butterfly valve plate squeezes the No. 1 sealing ring, the No. 1 sealing ring will squeeze the No. 2 sealing ring. The double-layer sealing effect of the No. 1 sealing ring and the No. 2 sealing ring improves the sealing performance of the valve body and avoids leakage of the valve body.

[0017] 2. In the utility model, the cross-section of the No. 2 sealing ring is designed to be circular, so as to reduce the influence of thermal expansion and contraction on the shape of the No. 2 sealing ring, and further ensure that the valve body has good sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 The utility model provides a front view structural schematic diagram of a high-performance butterfly valve with arc surface sealing;

[0020] Figure 2 The utility model provides a cross-sectional structural diagram of a high-performance butterfly valve with arc surface sealing;

[0021] Figure 3 for Figure 2The enlarged structural diagram of point A is shown.

[0022] The meanings of the reference numerals in the figure are: 1. blind head; 2. gasket; 3. No. 1 fixing bolt; 4. retaining ring; 5. lower valve stem; 6. valve body; 7. cylindrical pin; 8. butterfly valve plate; 9. upper valve stem; 10. No. 1 sealing ring; 11. No. 2 sealing ring; 12. pressure ring; 13. No. 2 fixing bolt; 14. bushing; 15. packing; 16. turbine case. DETAILED DESCRIPTION

[0023] In order to make the purpose, features, and advantages of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the embodiments described below are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0024] Reference Figure 1 , Figure 2 and Figure 3 A high-performance butterfly valve with circular arc surface sealing includes a valve body 6, a blind head 1 is fixedly connected to the bottom of the valve body 6, a No. 1 sealing ring 10 is installed inside the valve body 6, and the No. 1 sealing ring 10 is tightly fitted with one side of the butterfly valve plate 8, a pressing ring 12 is fixedly connected inside the valve body 6, and a No. 2 sealing ring 11 is fixedly connected to one side of the pressing ring 12, and the No. 2 sealing ring 11 is tightly fitted with the pressing ring 12, and the cross section of the No. 2 sealing ring 11 is circular;

[0025] A No. 1 fixing bolt 3 is provided on the surface of the bulkhead 1, and the valve body 6 is fixedly connected to the bulkhead 1 through the No. 1 fixing bolt 3, and the No. 1 fixing bolt 3 is threadedly connected to the bulkhead 1, and the No. 1 fixing bolt 3 is threadedly connected to the valve body 6, and a gasket 2 is provided between the bulkhead 1 and the valve body 6, and the gasket 2 is tightly fitted to the surfaces of the bulkhead 1 and the valve body 6, and a clamping ring 4 is installed on the upper part of the bulkhead 1, and the clamping ring 4 is fixedly connected to the lower valve stem 5, and the lower valve stem 5 is rotatably connected to the upper part of the bulkhead 1, and a shaft sleeve 14 is fixedly connected to the upper part of the valve body 6, and a turbine box 16 is installed on the upper part of the shaft sleeve 14;

[0026] An upper valve stem 9 is rotatably connected to the bottom of the turbine box 16, one end of the upper valve stem 9 is fixedly connected to the butterfly valve plate 8, the lower part of the butterfly valve plate 8 is fixedly connected to the lower valve stem 5, a cylindrical pin 7 is provided on the surface of the butterfly valve plate 8, the cylindrical pin 7 is plugged into the butterfly valve plate 8, and the cylindrical pin 7 is plugged into the lower valve stem 5, a No. 2 fixing bolt 13 is provided on the surface of the pressure ring 12, the pressure ring 12 is fixedly connected to the valve body 6 by the No. 2 fixing bolt 13, the No. 2 fixing bolt 13 is threadedly connected to the pressure ring 12, and the No. 2 fixing bolt 13 is threadedly connected to the valve body 6, and a packing 15 is provided between the shaft sleeve 14 and the upper valve stem 9.

[0027] Specifically, the upper valve stem 9 is driven to rotate by rotating the turntable of the turbine box 16, thereby driving the butterfly valve plate 8 to complete the opening and closing operation of the valve body 6. When the valve body 6 is closed, the butterfly valve plate 8 will first be pressed and fitted with the surface of the No. 1 sealing ring 10 to complete the closing of the valve body 6. When the butterfly valve plate 8 presses the No. 1 sealing ring 10, the No. 1 sealing ring 10 will press the No. 2 sealing ring 11. The double-layer sealing effect of the No. 1 sealing ring 10 and the No. 2 sealing ring 11 improves the sealing performance of the valve body 6 to prevent leakage of the valve body 6.

[0028] The circular cross-section design of the second sealing ring 11 reduces the influence of thermal expansion and contraction on the shape of the second sealing ring 11 , further ensuring that the valve body 6 has good sealing performance.

[0029] Working principle: By rotating the turntable of the turbine box 16, the upper valve stem 9 is driven to rotate, thereby driving the butterfly valve plate 8 to complete the opening and closing operation of the valve body 6. When the valve body 6 is closed, the butterfly valve plate 8 will first be squeezed and fitted with the surface of the No. 1 sealing ring 10 to complete the closing of the valve body 6. When the butterfly valve plate 8 squeezes the No. 1 sealing ring 10, the No. 1 sealing ring 10 will squeeze the No. 2 sealing ring 11, and the double-layer sealing effect of the No. 1 sealing ring 10 and the No. 2 sealing ring 11 improves the sealing performance of the valve body 6.

[0030] It will be apparent to those skilled in the art that the present application is not limited to the details of the exemplary embodiments described above, and that the present application can be implemented in other specific forms without departing from the spirit or essential features of the present application. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended that all changes within the meaning and scope of the equivalent elements of the claims be included in the present application. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0031] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A high-performance butterfly valve with arc surface sealing, comprising a valve body (6), a blind head (1) fixedly connected to the bottom of the valve body (6), characterized in that: A No. 1 sealing ring (10) is installed inside the valve body (6), and the No. 1 sealing ring (10) is tightly fitted with one side of the butterfly valve plate (8). A pressure ring (12) is fixedly connected inside the valve body (6), and a No. 2 sealing ring (11) is fixedly connected to one side of the pressure ring (12). The No. 2 sealing ring (11) is tightly fitted with the pressure ring (12), and the cross-section of the No. 2 sealing ring (11) is circular.

2. The arc surface sealing high-performance butterfly valve according to claim 1, characterized in that: A No. 1 fixing bolt (3) is provided on the surface of the blind head (1), the valve body (6) and the blind head (1) are fixedly connected via the No. 1 fixing bolt (3), the No. 1 fixing bolt (3) is threadedly connected to the blind head (1), and the No. 1 fixing bolt (3) is threadedly connected to the valve body (6).

3. The arc surface sealing high-performance butterfly valve according to claim 1 is characterized in that: A gasket (2) is provided between the blind head (1) and the valve body (6), and the gasket (2) is tightly fitted to the surfaces of the blind head (1) and the valve body (6).

4. The arc surface sealing high-performance butterfly valve according to claim 1, characterized in that: A clamping ring (4) is installed on the upper part of the blind head (1); the clamping ring (4) is fixedly connected to the lower valve stem (5); and the lower valve stem (5) is rotatably connected to the upper part of the blind head (1).

5. The arc surface sealing high-performance butterfly valve according to claim 1, characterized in that: The upper part of the valve body (6) is fixedly connected with a shaft sleeve (14), and the upper part of the shaft sleeve (14) is installed with a turbine box (16).

6. The arc surface sealing high-performance butterfly valve according to claim 5, characterized in that: An upper valve stem (9) is rotatably connected to the bottom of the turbine box (16), one end of the upper valve stem (9) is fixedly connected to a butterfly valve plate (8), and the lower part of the butterfly valve plate (8) is fixedly connected to a lower valve stem (5).

7. The arc surface sealing high-performance butterfly valve according to claim 1, characterized in that: A cylindrical pin (7) is arranged on the surface of the butterfly valve plate (8), the cylindrical pin (7) is plugged into the butterfly valve plate (8), and the cylindrical pin (7) is plugged into the lower valve stem (5).

8. The arc surface sealing high-performance butterfly valve according to claim 1, characterized in that: A No. 2 fixing bolt (13) is provided on the surface of the pressure ring (12), and the pressure ring (12) and the valve body (6) are fixedly connected via the No. 2 fixing bolt (13). The No. 2 fixing bolt (13) is threadedly connected to the pressure ring (12), and the No. 2 fixing bolt (13) is threadedly connected to the valve body (6).

9. The arc surface sealing high-performance butterfly valve according to claim 5, characterized in that: A packing (15) is arranged between the shaft sleeve (14) and the upper valve stem (9).

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