All-metal forging high-temperature butterfly valve

Abstract

The utility model relates to the technical field of valves, in particular to an all-metal forging high-temperature butterfly valve which comprises a valve body, a butterfly plate, a valve seat and a valve rod connected with the butterfly plate, a medium channel is arranged in the valve body, and the butterfly plate and the valve seat are both arranged in the medium channel. The medium channel is divided into an inlet channel and an outlet channel through sealing fit of the butterfly plate and the valve seat, the valve seat comprises two semi-arc-shaped sealing seats, the two semi-arc-shaped sealing seats are distributed in a 180-degree rotating mode relative to the axis of the butterfly plate, and sealing strips are embedded in the ends, close to the butterfly plate, of the semi-arc-shaped sealing seats. The butterfly valve is provided with the valve seat forming annular sealing on the butterfly plate, namely the two semi-arc-shaped sealing seats which rotate by 180 degrees relative to the axis of the butterfly plate, the semi-arc-shaped sealing seats are tightly abutted against the butterfly plate through the sealing assembly, and good sealing performance of the butterfly valve can be guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to an all-metal forged high-temperature butterfly valve. Background Art

[0002] The butterfly valve, also known as the flap valve, is a simple regulating valve. It refers to a valve with a closing part (valve disc or butterfly plate) as a disc, which rotates around the valve shaft to achieve opening and closing or regulation. It is suitable for controlling the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. It mainly plays a role of cutting off and throttling in pipelines. However, in the pipeline transportation device of high-temperature media, the butterfly valve in the pipeline is easily deformed due to the high temperature, resulting in malfunction or even failure of the switch.

[0003] Patent CN209483948U discloses a high-temperature butterfly valve, including a valve body, a valve seat, a butterfly plate, a valve stem, and a transmission mechanism. The butterfly plate has a sealing surface that cooperates with the valve seat. The upper end of the valve body is mainly connected to an upper bearing frame, and the lower end of the valve body is connected to a lower bearing frame. The upper bearing frame and the lower bearing frame are respectively provided with thermal insulation windows. The thermal insulation window on the upper bearing frame is located between the upper bearing and the valve body, and the thermal insulation window on the lower bearing frame is located between the lower bearing and the valve body. A packing sealing device is arranged between the valve body and the valve stem located on the inner side of the thermal insulation window. This scheme has a heat insulation structure, which better solves the problem that the above-mentioned butterfly valve cannot be used for high-temperature medium transportation.

[0004] However, this solution still has the following problems: due to the characteristics of high-temperature butterfly valves, when the butterfly valve conveys high-temperature media for a long time, it is easy to increase the wear of the valve seat and the butterfly plate, thereby reducing the sealing performance of the valve seat and the butterfly plate. Utility Model Content

[0005] The purpose of the utility model is to overcome the shortcomings and deficiencies of the prior art and to provide a full metal forged high-temperature butterfly valve. The utility model has a valve seat that forms an annular seal on the butterfly plate, which can ensure that the butterfly valve has good sealing performance.

[0006] The technical solution adopted by the utility model is as follows: an all-metal forged high-temperature butterfly valve, comprising a valve body, a butterfly plate, a valve seat and a valve stem connected to the butterfly plate, a medium channel being provided inside the valve body, the butterfly plate and the valve seat being both arranged in the medium channel, the medium channel being separated into an inlet channel and an outlet channel by the sealing cooperation between the butterfly plate and the valve seat, one end of the valve stem extending to the outside of the valve body for connecting to an actuator and the other end for connecting to a rotating bearing, the valve seat comprising two semi-arc sealing seats, the two semi-arc sealing seats being rotated 180° relative to the axis of the butterfly plate, a sealing strip being embedded in the end of the semi-arc sealing seat close to the butterfly plate, and a sealing component being abutted against the semi-arc sealing seat being provided on the inner wall of the valve body.

[0007] The sealing assembly includes a mounting block and an abutting block. The mounting block is threadedly connected to the valve body by bolts. One end of the abutting block abuts against the mounting block and the other end abuts against the semi-circular sealing seat. The mounting block extends with a tapered angle, and the tapered angle presses the abutting block tightly against the inner wall of the valve body.

[0008] The abutting block is provided with a mounting groove, and an elastic member is installed in the mounting groove. One end of the elastic member abuts against the mounting groove and the other end abuts against the semi-circular sealing seat.

[0009] A sealing gap is left between the mounting block and the valve body. The end of the mounting block located at the tapered angle is provided with an inclined surface, and the abutting block is provided with an inclined conical surface adapted to the inclined surface.

[0010] The valve stem is axially provided with a through water injection cavity. One end of the valve stem is provided with a water injection port communicated with the water injection cavity and the other end is provided with a water outlet communicated with the water injection cavity. The butterfly plate is provided with a cold water cavity communicated with the water injection cavity.

[0011] A first partition plate is arranged in the cold water cavity. The first partition plate is penetrated with a plurality of uniformly distributed first slow flow holes, and a bending part is arranged inside the first slow flow holes.

[0012] A second partition plate is further arranged in the cold water cavity. The second partition plate is penetrated with a plurality of uniformly distributed second slow flow holes. The second slow flow holes have the same structure as the first slow flow holes and are arranged in a staggered manner with the first slow flow holes.

[0013] The valve body, valve seat, valve stem and butterfly plate are all made of all-metal materials and are all formed by forging process.

[0014] The beneficial effects of the present utility model are as follows: The present utility model has a valve seat that forms an annular seal for the butterfly plate, that is, two semi-circular sealing seats that are rotationally distributed 180° relative to the axis of the butterfly plate. Then, the semi-circular sealing seats are tightly pressed against the butterfly plate through the sealing assembly, which can ensure that the butterfly valve has good sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, obtaining other drawings without creative efforts still belongs to the scope of the present utility model.

[0016] Figure 1 It is a schematic structural diagram of the all-metal forged high-temperature butterfly valve of the present utility model;

[0017] Figure 2 For Figure 1Schematic diagram of the partial enlarged structure at A in the [device];

[0018] Figure 3 Schematic cross-sectional structure diagram at the medium channel in the present utility model;

[0019] Figure 4 is Figure 3 Schematic diagram of the partial enlarged structure at B in the [device];

[0020] In the figure, 1 - valve body, 2 - butterfly plate, 3 - valve seat, 4 - valve stem, 5 - medium channel, 6 - semi-circular sealing seat, 7 - sealing strip, 8 - mounting block, 9 - abutting block, 10 - bolt, 11 - conical angle, 12 - mounting groove, 13 - elastic member, 14 - sealing gap, 15 - inclined surface, 16 - inclined cone surface, 17 - water injection cavity, 18 - water injection port, 19 - water outlet, 20 - cold water cavity, 21 - first partition plate, 22 - first slow flow hole, 23 - bending part, 24 - second partition plate, 25 - second slow flow hole. Detailed implementation manners

[0021] To make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0022] It should be noted that all expressions using "first" and "second" in the embodiments of the present utility model are used to distinguish two entities or parameters with the same name but different, so "first" and "second" are only for the convenience of expression and should not be construed as a limitation on the embodiments of the present utility model. This will not be elaborated one by one in subsequent embodiments.

[0023] The direction and position terms mentioned in the present utility model, such as "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "top", "bottom", "side", etc., are only with reference to the direction or position of the accompanying drawings. Therefore, the direction and position terms used are for the purpose of explaining and understanding the present utility model, rather than a limitation on the protection scope of the present utility model.

[0024] Such as Figures 1 to 4As shown in the figure, an embodiment of the present utility model is a fully metal forged high-temperature butterfly valve, which includes a valve body 1, a butterfly plate 2, a valve seat 3, and a valve stem 4 connected to the butterfly plate 2. A medium channel 5 is provided inside the valve body 1. The butterfly plate 2 and the valve seat 3 are both arranged in the medium channel 5. The medium channel 5 is divided into an inlet channel and an outlet channel by the sealing cooperation of the butterfly plate 2 and the valve seat 3. One end of the valve stem 4 extends outside the valve body 1 for connecting an actuator, and the other end is used for connecting a rotating bearing. The valve seat 3 includes two semi-circular sealing seats 6, and the two semi-circular sealing seats 6 are rotationally distributed 180° relative to the axis of the butterfly plate 2. A sealing strip 7 is embedded at one end of the semi-circular sealing seat 6 close to the butterfly plate 2. A sealing component is provided on the inner wall of the valve body 1 and abuts against the semi-circular sealing seat 6.

[0025] The beneficial effects of such a setting are as follows. The present utility model has a valve seat that forms an annular seal for the butterfly plate, that is, two semi-circular sealing seats that are rotationally distributed 180° relative to the axis of the butterfly plate. Then, the semi-circular sealing seats are tightly abutted against the butterfly plate through the sealing component, which can ensure that the butterfly valve has good sealing performance.

[0026] Further, the sealing component includes a mounting block 8 and an abutting block 9. The mounting block 8 is threadedly connected to the valve body 1 through a bolt 10. One end of the abutting block 9 abuts against the mounting block 8, and the other end abuts against the semi-circular sealing seat 6. A conical angle 11 extends from the mounting block 8, and the conical angle 11 abuts the abutting block 9 tightly against the inner wall of the valve body 1.

[0027] The beneficial effects of such a setting are as follows. The conical angle of the mounting block abuts the abutting block tightly between the inner wall of the valve body and the semi-circular sealing seat, providing support force for the semi-circular sealing seat, which is firm and stable, preventing the semi-circular sealing seat from moving, ensuring good sealing performance. The mounting block is connected to the inner wall of the valve body through bolts, which has the advantage of quick disassembly.

[0028] Further, the abutting block 9 is provided with a mounting groove 12, and an elastic member 13 is installed in the mounting groove 12. One end of the elastic member 13 abuts against the mounting groove 12, and the other end abuts against the semi-circular sealing seat 6.

[0029] The beneficial effects of such a setting are as follows. An elastic member is installed in the mounting groove of the abutting block. The elastic member provides an elastic sealing effect for the semi-circular sealing seat. After the semi-circular sealing seat is worn, the elastic member still has the ability of self-compensation, so that the semi-circular sealing seat and the butterfly plate always maintain good sealing fit.

[0030] Further, a sealing gap 14 is left between the mounting block 8 and the valve body 1. An inclined surface 15 is provided at one end of the mounting block 8 located at the conical angle 11. The abutting block 9 is provided with an inclined conical surface 16 adapted to the inclined surface 15.

[0031] The beneficial effects of such a setting are as follows. The installation position of the installation block can be adjusted through the sealing gap. Tightening the bolt reduces the sealing gap. The taper angle is an acute angle, and the inclined surface inclines towards the inner side of the taper angle. The installation block pushes the abutting block to the right through the cooperation of the inclined surface and the inclined cone surface until it tightly abuts against the semi-circular sealing seat, having the advantages of better sealing performance and being convenient for adjustment.

[0032] Further, a through water injection cavity 17 is axially formed in the valve stem 4. One end of the valve stem 4 is provided with a water injection port 18 communicated with the water injection cavity 17, and the other end is provided with a water outlet 19 communicated with the water injection cavity 17. The butterfly plate 2 is provided with a cold water cavity 20 communicated with the water injection cavity 17.

[0033] The beneficial effects of such a setting are as follows. Injecting water into the communicated water injection cavity and cold water cavity cools the valve stem and the butterfly plate, having a better cooling effect to adapt to high-temperature media.

[0034] Further, a first partition plate 21 is arranged in the cold water cavity 20. The first partition plate 21 is penetrated by a plurality of uniformly distributed first slow-flow holes 22, and a bending part 23 is arranged inside the first slow-flow holes 22.

[0035] The beneficial effects of such a setting are as follows. The flow rate of the cooling water in the cold water cavity is delayed through the first partition plate and the first slow-flow holes on the first partition plate, increasing the time for the cooling water to absorb heat. Then, the flow rate of the cooling water is further delayed through the bending part, further improving the heat absorption efficiency.

[0036] Further, a second partition plate 24 is also arranged in the cold water cavity 20. The second partition plate 24 is penetrated by a plurality of uniformly distributed second slow-flow holes 25. The second slow-flow holes 25 have the same structure as the first slow-flow holes 22 and are arranged in a staggered manner with the first slow-flow holes 22.

[0037] The beneficial effects of such a setting are as follows. The time for the cooling water to absorb heat in the cold water cavity is further increased through the second partition plate and the second slow-flow holes on the second partition plate. The second slow-flow holes are arranged in a staggered manner with the first slow-flow holes, and also have the effect of slowing down the cooling water.

[0038] Further, the valve body 1, the valve seat 3, the valve stem 4, and the butterfly plate 2 are all made of all-metal materials and are all formed by forging processes.

[0039] The beneficial effects of such a setting are as follows. High structural strength, good sealing effect, and strong heat conduction ability.

[0040] The above-disclosed are only the preferred embodiments of the present invention. Of course, the scope of the rights of the present invention cannot be limited thereby. Therefore, equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. An all-metal forged high-temperature butterfly valve, comprising a valve body (1), a butterfly plate (2), a valve seat (3), and a valve stem (4) connected to the butterfly plate (2); a medium channel (5) is provided inside the valve body (1); the butterfly plate (2) and the valve seat (3) are both arranged in the medium channel (5); the medium channel (5) is divided into an inlet channel and an outlet channel by sealing cooperation between the butterfly plate (2) and the valve seat (3); one end of the valve stem (4) extends to the outside of the valve body (1) for connecting to an actuator and the other end is used to connect to a rotating bearing, and is characterized in that: The valve seat (3) comprises two semi-arc sealing seats (6), the two semi-arc sealing seats (6) are rotated 180 degrees relative to the axis of the butterfly plate (2), a sealing strip (7) is embedded in one end of the semi-arc sealing seat (6) close to the butterfly plate (2), and the inner wall of the valve body (1) is provided with a sealing component that abuts against the semi-arc sealing seat (6).

2. The all-metal forged high-temperature butterfly valve according to claim 1, characterized in that: The sealing assembly comprises a mounting block (8) and an abutment block (9); the mounting block (8) is threadedly connected to the valve body (1) via a bolt (10); one end of the abutment block (9) abuts against the mounting block (8) and the other end abuts against the semi-arc sealing seat (6); the mounting block (8) extends with a tapered angle (11), and the tapered angle (11) presses the abutment block (9) against the inner wall of the valve body (1).

3. The all-metal forged high-temperature butterfly valve according to claim 2, characterized in that: The abutment block (9) is provided with a mounting groove (12), an elastic member (13) is installed in the mounting groove (12), one end of the elastic member (13) abuts against the mounting groove (12) and the other end abuts against the semi-arc sealing seat (6).

4. The all-metal forged high-temperature butterfly valve according to claim 2, characterized in that: A sealing gap (14) is left between the mounting block (8) and the valve body (1); an inclined surface (15) is provided at one end of the mounting block (8) located at the conical angle (11); and the abutment block (9) is provided with an inclined conical surface (16) matching the inclined surface (15).

5. The all-metal forged high-temperature butterfly valve according to claim 1, characterized in that: The valve stem (4) is provided with a water injection chamber (17) extending therethrough in the axial direction; one end of the valve stem (4) is provided with a water injection port (18) communicating with the water injection chamber (17) and the other end is provided with a water outlet (19) communicating with the water injection chamber (17); and the butterfly plate (2) is provided with a cold water chamber (20) communicating with the water injection chamber (17).

6. The all-metal forged high-temperature butterfly valve according to claim 5, characterized in that: A first baffle (21) is provided in the cold water chamber (20), a plurality of evenly distributed first slow flow holes (22) penetrate the first baffle (21), and a bending portion (23) is provided inside the first slow flow hole (22).

7. The all-metal forged high-temperature butterfly valve according to claim 6, characterized in that: A second baffle (24) is also provided in the cold water chamber (20), and a plurality of evenly distributed second slow flow holes (25) are penetrated through the second baffle (24), and the second slow flow holes (25) have the same structure as the first slow flow holes (22) and are arranged in a staggered manner with the first slow flow holes (22).

8. The all-metal forged high-temperature butterfly valve according to claim 1, characterized in that: The valve body (1), valve seat (3), valve stem (4) and butterfly plate (2) are all made of full metal material and are formed by a forging process.

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