High-temperature and high-pressure forged steel butterfly valve

Abstract

The utility model relates to a high-temperature high-pressure forged steel butterfly valve, and relates to the technical field of control valves, the high-temperature high-pressure forged steel butterfly valve comprises a valve body, a butterfly plate for performing opening and closing control on a valve body channel, and a valve seat matched with the butterfly plate for sealing, a sealing mechanism for enhancing the sealing performance of the valve seat is arranged on the valve body, and the sealing mechanism comprises a sealing ring, a valve rod and a valve rod, the abutting assembly is arranged on the valve body and enables the sealing ring to abut against the valve seat. The sealing ring abuts against the valve seat through the abutting assembly, so that the valve seat keeps good sealing performance on the butterfly plate, when the sealing ring deforms in the high-temperature and high-pressure environment, through continuous abutting of the abutting assembly, the sealing ring can still abut against the valve body under the influence of high temperature and high pressure, and therefore the sealing performance of the butterfly plate is improved. Therefore, good sealing performance of the valve seat to the butterfly plate is achieved, and the sealing performance of the butterfly valve in a high-temperature and high-pressure environment is improved.

Description

Technical Field

[0001] The present application relates to the technical field of control valves, and in particular to high-temperature and high-pressure forged steel butterfly valves. Background Art

[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 valve whose closing member is a disc that rotates around the valve axis to achieve opening and closing.

[0003] Valves can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. They mainly play the role of cutting off and throttling in pipelines. The butterfly valve opening and closing part is a disc-shaped butterfly plate that rotates around its own axis in the valve body to achieve the purpose of opening, closing or regulating.

[0004] At present, butterfly valves are often used to control the medium in low-pressure pipelines. However, in high-temperature and high-pressure scenarios, butterfly valves are easily affected by high temperatures, which makes the internal temperature and pressure of the butterfly valve higher, and the sealing ring used to seal the butterfly valve is prone to deformation, which ultimately causes the sealing performance of the butterfly valve to decrease. Utility Model Content

[0005] In order to improve the sealing performance of a butterfly valve under high temperature and high pressure environment, the present application provides a high temperature and high pressure forged steel butterfly valve.

[0006] The high temperature and high pressure forged steel butterfly valve provided in this application adopts the following technical solution:

[0007] A high-temperature and high-pressure forged steel butterfly valve comprises a valve body, a disc plate rotatably arranged on the valve body and controlling the opening and closing of the valve body channel, a valve seat arranged on the valve body and sealingly cooperating with the disc plate, and a sealing mechanism for enhancing the sealing performance of the valve seat is arranged on the valve body, and the sealing mechanism comprises:

[0008] A sealing ring, which is slidably disposed on the valve body and is used to seal the valve seat;

[0009] A tightening assembly is arranged on the valve body and tightens the sealing ring against the valve seat.

[0010] By adopting the above technical solution, the tightening component presses the sealing ring against the valve seat, so that the valve seat maintains good sealing performance against the disc plate. When the sealing ring is deformed under high temperature and high pressure environment, the sealing ring can still be pressed against the valve body under the influence of high temperature and high pressure through the continuous tightening of the tightening component, thereby achieving good sealing performance of the valve seat against the disc plate and improving the sealing performance of the butterfly valve under high temperature and high pressure environment.

[0011] Furthermore, the valve seat is composed of a sliding seat and a movable seat, both of which can slide along the axial direction of the valve body, and both ends of the sealing ring are pressed against the sliding seat and the movable seat respectively.

[0012] By adopting the above technical solution, the sliding seat is pressed against the valve body, the movable seat is pressed against the disc plate, and the two ends of the sealing ring are pressed against the opposite side walls of the movable seat and the sliding seat respectively, so as to ensure the sealing effect of the movable seat and the sliding seat, and finally achieve the sealing effect of the movable seat on the disc plate.

[0013] Further, the abutting assembly comprises:

[0014] A pressure-maintaining spring, which is arranged on the valve body and can be extended and retracted along the axial direction of the valve body, one end of which is pressed against the sliding seat and is used to press the sliding seat toward the movable seat;

[0015] The abutment block is arranged on the valve body and abuts against an end of the pressure-retaining spring away from the sliding seat.

[0016] By adopting the above technical scheme, the pressure-maintaining spring presses against the sliding seat, and the abutment block presses and fixes the other end of the pressure-maintaining spring, so that the pressure-maintaining spring always has a good pressing effect on the fixed block. When the sealing ring is deformed under high temperature and high pressure environment, the sealing ring can still be pressed against the movable block under the influence of high temperature and high pressure through the continuous pressing of the pressure-maintaining spring, so as to achieve good sealing of the movable seat to the disc plate, thereby improving the sealing of the butterfly valve under high temperature and high pressure environment.

[0017] Furthermore, the clamping block can slide along the expansion and contraction direction of the pressure-maintaining spring, and an adjusting member for adjusting the position of the clamping block is provided on the valve body. The adjusting member is an adjusting bolt that is clamped on the end of the clamping block away from the pressure-maintaining spring, and the axis of the adjusting bolt coincides with the axis of the pressure-maintaining spring and is threadedly connected to the valve body.

[0018] By adopting the above technical solution, the position of the clamping block is controlled by adjusting the distance that the adjusting bolt extends into the valve body. When the clamping block is closer to the valve seat, the pressure value of the pressure-maintaining spring is greater, and the pressure on the valve seat is greater, so that the sealing effect of the valve seat on the disc plate is better, but at the same time, the force of the valve seat on the disc plate is also greater.

[0019] Furthermore, the cross section of the sealing ring is a trapezoidal structure and the end close to the valve body is the lower bottom edge, and the sealing ring presses the movable seat toward the direction close to the disc plate.

[0020] By adopting the above technical solution, the two side walls of the sealing ring are respectively pressed against the two opposite side walls of the sliding seat and the movable seat. The sealing ring presses the movable seat toward the disc plate through the cross section of the trapezoidal structure, thereby improving the sealing effect of the sealing ring.

[0021] Furthermore, the valve body is provided with a fixing assembly for fixing the valve seat, and the fixing assembly includes:

[0022] A fixing block, which is arranged on the valve body and is used to fix one end of the valve seat;

[0023] The limit block is plugged and arranged on the valve body and is used to fix and limit the end of the valve seat away from the fixed block.

[0024] By adopting the above technical solution, the fixed block and the limit block press against the opposite ends of the valve seat to limit the position, so that the sliding seat and the movable seat can only slide between the fixed block and the limit block, thereby improving the sealing effect of the valve seat on the disc plate.

[0025] Furthermore, a sliding hole is opened on the fixed block along the axial direction of the valve body, and a plurality of groups of the sliding holes are arranged in a circular array along the circumference of the valve body axis. The pressure-maintaining spring and the abutment block are both arranged in the sliding holes.

[0026] By adopting the above technical solution, the pressure-maintaining spring and the abutment block both move in the sliding hole, thereby guiding the moving direction of the pressure-maintaining spring and the abutment block. At the same time, by arranging multiple groups of sliding holes on the fixed block, the abutment effect of the pressure-maintaining spring on the fixed block is enhanced, and the abutment sealing effect of the valve seat on the disc plate is improved.

[0027] Furthermore, the valve body is provided with a plurality of groups of heat dissipation fins for reducing the temperature of the valve body.

[0028] By adopting the above technical solution, the heat dissipation fins dissipate heat from the valve body in time, thereby reducing the temperature of the valve body and the probability that the valve stem will be deformed due to heat and twisted under the action of torsion.

[0029] Furthermore, a valve stem for controlling the rotation of the disc plate is rotatably arranged on the valve body, and the valve stem and the disc plate are eccentrically arranged.

[0030] By adopting the above technical solution, the valve stem and the disc plate are eccentrically arranged, that is, the axis of the valve stem and the center line of the disc plate do not coincide, thereby reducing excessive extrusion between the upper and lower ends of the butterfly plate and the valve seat.

[0031] In summary, the present application includes at least one of the following beneficial technical effects:

[0032] The sliding seat is pressed against the movable seat by the pressure-retaining spring, and the sliding seat is pressed against the movable seat by the sealing ring. When the sealing ring is deformed under high temperature and high pressure environment, the sealing ring is always pressed against the movable seat by the pressure-retaining spring, so that the sealing ring can still press against the movable seat under the influence of high temperature and high pressure, thereby achieving good sealing of the movable seat to the disc plate. At the same time, cooling fins are installed on the valve body to dissipate heat from the valve body, thereby reducing the temperature of the valve stem and the probability of the valve stem being deformed due to heat and twisted under the action of torque, thereby improving the sealing of the butterfly valve under high temperature and high pressure environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the half-section structure of the butterfly valve of the present application;

[0034] Figure 2 yes Figure 1 Enlarged schematic diagram of part A in the middle.

[0035] Figure numerals: 1. valve body; 11. through pipe; 12. neck; 13. channel; 14. valve stem; 2. disc plate; 3. fixing assembly; 31. fixing block; 311. sliding hole; 32. limiting block; 4. valve seat; 41. sliding seat; 411. fixing groove; 42. movable seat; 5. sealing mechanism; 51. sealing ring; 52. tightening assembly; 521. pressure-maintaining spring; 522. tightening block; 6. heat dissipation fin; 7. adjusting member; 71. adjusting bolt. DETAILED DESCRIPTION

[0036] The following is combined with Figure 1-2 This application is described in further detail.

[0037] The embodiments of the present application disclose a high-temperature and high-pressure forged steel butterfly valve.

[0038] Reference Figure 1 The high-temperature and high-pressure forged steel butterfly valve comprises a valve body 1, a disc plate 2 rotatably arranged on the valve body 1 and controlling the opening and closing of a channel 13 of the valve body 1, a valve seat 4 arranged on the valve body 1 and sealingly cooperating with the disc plate 2, and a sealing mechanism 5 for enhancing the sealing performance of the valve seat 4 is arranged on the valve body 1.

[0039] Reference Figure 1The valve body 1 is composed of a through pipe 11 for medium to pass through and a neck 12 for controlling the rotation of the disc plate 2, wherein a channel 13 for medium to pass through is opened inside the through pipe 11; the disc plate 2 is a circular plate-shaped structure, and the disc plate 2 is rotatably installed in the through pipe 11. A valve stem 14 for controlling the rotation of the disc plate 2 is rotatably arranged on the valve body 1, and the valve stem 14 passes through the neck 12 and is fixedly connected to the disc plate 2. The valve stem 14 is rotatably connected to the valve body 1, and the valve stem 14 is used to drive the disc plate 2 to rotate, so as to open or close the channel 13; the valve stem 14 is eccentrically arranged with the disc plate 2, that is, the axis of the valve stem 14 does not coincide with the center line of the disc plate 2, so as to reduce excessive extrusion of the upper and lower ends of the butterfly plate and the valve seat 4; a plurality of groups of heat dissipation fins 6 are arranged on the neck 12, and the heat dissipation fins 6 are used to timely dissipate heat from the neck 12, thereby reducing the temperature of the valve stem 14 and reducing the probability of the valve stem 14 being deformed due to heat and twisted under the action of torsion.

[0040] Reference Figure 1 and Figure 2 A valve seat 4 that seals with the disc plate 2 is provided in the valve body 1, and a fixing assembly 3 for fixing the valve seat 4 is provided on the valve body 1. The fixing assembly 3 includes a fixing block 31 and a limiting block 32. The fixing block 31 is an annular structure. The fixing block 31 is coaxially fixed with the valve body 1 on the inner wall of the valve body 1. The valve seat 4 is coaxially installed inside the valve body 1 and can slide along the axial direction. The sliding seat 41 presses and fixes one end of the valve seat 4; the limiting block 32 is an annular structure. The limiting block 32 is plugged and installed on the inner wall of the valve body 1. The limiting block 32 is used to abut and fix the end of the valve seat 4 away from the fixing block 31.

[0041] Reference Figure 1 and Figure 2 The valve seat 4 is composed of a sliding seat 41 and a movable seat 42. The sliding seat 41 is a circular ring structure. The sliding seat 41 is coaxially fixedly installed on the inner wall of the valve body 1. The sliding seat 41 can slide along the axial direction of the valve body 1. The fixed block 31 is used to abut and fix one end of the sliding seat 41; the sliding seat 41 is provided with a fixing groove 411 that cooperates with the fixed block 31, and the adjacent two side walls of the fixing groove 411 are respectively tightly fixed with the fixed block 31; the movable seat 42 is a circular ring structure. 42 is coaxially fixedly installed on the inner wall of the valve body 1, and the movable seat 42 can slide along the axial direction of the valve body 1. The limit block 32 is used to abut and fix the end of the movable seat 42 away from the sliding seat 41. The end of the limit block 32 close to the axis is provided with a bevel that cooperates with the disc plate 2; the movable seat 42 presses and fixes the end of the sliding seat 41 close to the axis, so as to prevent the sliding seat 41 from detaching from the inner wall of the valve body 1, and at the same time improves the abutment and sealing effect of the movable seat 42 on the disc plate 2.

[0042] Reference Figure 1 and Figure 2The sealing mechanism 5 includes a sealing ring 51 and a pressing assembly 52. ​​The sealing ring 51 is slidably arranged on the valve body 1 and is used to seal the valve seat 4. The sealing ring 51 is an annular structure. The cross section of the sealing ring 51 is a trapezoidal structure and the end close to the valve body 1 is the lower bottom edge. The two side walls of the sealing ring 51 are respectively pressed against the two side walls opposite to the sliding seat 41 and the movable seat 42. The sealing ring 51 presses the movable seat 42 toward the disc plate 2 through the cross section of the trapezoidal structure; the pressing assembly 52 is arranged on the valve body 1 and The sealing ring 51 is pressed against the valve seat 4. The cross section of the sealing ring 51 of this embodiment is an isosceles trapezoidal structure. The pressing assembly 52 includes a pressure-maintaining spring 521 and a pressing block 522. A sliding hole 311 is opened on the fixed block 31 along the axial direction of the valve body 1. The sliding holes 311 are arranged in a plurality of groups in a circular array along the axial direction of the valve body 1. The pressure-maintaining spring 521 is placed in the sliding hole 311. The pressure-maintaining spring 521 can be extended and retracted along the axial direction of the valve body 1. One end of the pressure-maintaining spring 521 close to the sliding seat 41 is pressed against the sliding seat 41. The fixing block 522 is used to press the sliding seat 41 toward the movable seat 42; the pressing block 522 is slidably arranged in the sliding hole 311 along the expansion and contraction direction of the pressure-maintaining spring 521, and the pressing block 522 presses against the end of the pressure-maintaining spring 521 away from the sliding seat 41; the fixing block 31 is provided with an adjusting member 7 for adjusting the position of the pressing block 522, and the adjusting member 7 is an adjusting bolt 71 pressed against the end of the pressing block 522 away from the pressure-maintaining spring 521, and the axis of the adjusting bolt 71 coincides with the axis of the pressure-maintaining spring 521. The joint bolt 71 is threadedly connected to the fixed block 31, and the position of the clamping block 522 is controlled by adjusting the distance that the adjusting bolt 71 extends into the sliding hole 311; when the clamping block 522 is closer to the valve seat 4, the pressure value of the pressure-maintaining spring 521 is greater, and the pressure on the valve seat 4 is greater, so that the sealing effect of the valve seat 4 on the disc plate 2 is better, but at the same time, the force of the valve seat 4 on the disc plate 2 is also greater; a plurality of sliding holes 311 are provided with clamping assemblies 52 to improve the clamping effect on the sealing ring 51.

[0043] The working principle of the embodiment of the present application is as follows:

[0044] The sliding seat 41 is pressed against the movable seat 42 through the pressure-maintaining spring 521, and the sliding seat 41 is pressed against the movable seat 42 through the sealing ring 51. When the sealing ring 51 is deformed under high temperature and high pressure, the sealing ring 51 is always pressed against the movable seat 42 through the pressure-maintaining spring 521, so that the sealing ring 51 can still be pressed against the movable seat 42 under the influence of high temperature and high pressure, thereby achieving good sealing of the movable seat 42 to the disc plate 2. At the same time, by installing heat dissipation fins 6 on the valve body 1, the valve body 1 is cooled, the temperature of the valve stem 14 is reduced, and the probability of the valve stem 14 being deformed due to heat and twisted under the action of torque is reduced, thereby improving the sealing of the butterfly valve under high temperature and high pressure environment.

[0045] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. High temperature and high pressure forged steel butterfly valve, characterized by: The valve body (1) comprises a valve body (1), a disc plate (2) rotatably arranged on the valve body (1) and controlling the opening and closing of a channel (13) of the valve body (1), a valve seat (4) arranged on the valve body (1) and cooperating with the disc plate (2) for sealing, and a sealing mechanism (5) arranged on the valve body (1) for enhancing the sealing performance of the valve seat (4), wherein the sealing mechanism (5) comprises: A sealing ring (51), the sealing ring (51) being slidably disposed on the valve body (1) and used to seal the valve seat (4); A tightening assembly (52), wherein the tightening assembly (52) is arranged on the valve body (1) and tightens the sealing ring (51) against the valve seat (4).

2. The high temperature and high pressure forged steel butterfly valve according to claim 1, characterized in that: The valve seat (4) is composed of a sliding seat (41) and a movable seat (42), and both the sliding seat (41) and the movable seat (42) can slide along the axial direction of the valve body (1), and the two ends of the sealing ring (51) are respectively pressed against the sliding seat (41) and the movable seat (42).

3. The high temperature and high pressure forged steel butterfly valve according to claim 2, characterized in that: The tightening assembly (52) comprises: a pressure-retaining spring (521), the pressure-retaining spring (521) being arranged on the valve body (1) and being capable of extending and contracting along the axial direction of the valve body (1), one end of the pressure-retaining spring (521) being pressed against the sliding seat (41) and being used to press the sliding seat (41) towards the movable seat (42); A tightening block (522), wherein the tightening block (522) is arranged on the valve body (1) and abuts against an end of the pressure-retaining spring (521) away from the sliding seat (41).

4. The high temperature and high pressure forged steel butterfly valve according to claim 3, characterized in that: The pressing block (522) can slide along the expansion and contraction direction of the pressure-retaining spring (521), and the valve body (1) is provided with an adjusting member (7) for adjusting the position of the pressing block (522). The adjusting member (7) is an adjusting bolt (71) pressed against an end of the pressing block (522) away from the pressure-retaining spring (521), and the axis of the adjusting bolt (71) coincides with the axis of the pressure-retaining spring (521) and is threadedly connected to the valve body (1).

5. The high temperature and high pressure forged steel butterfly valve according to claim 2, characterized in that: The cross section of the sealing ring (51) is a trapezoidal structure, and the end close to the valve body (1) is the lower bottom edge. The sealing ring (51) presses the movable seat (42) towards the disc plate (2).

6. The high temperature and high pressure forged steel butterfly valve according to claim 3, characterized in that: The valve body (1) is provided with a fixing assembly (3) for fixing the valve seat (4), and the fixing assembly (3) comprises: A fixing block (31), wherein the fixing block (31) is arranged on the valve body (1) and is used to fix one end of the valve seat (4); A limit block (32), wherein the limit block (32) is inserted into the valve body (1) and is used to fix and limit the end of the valve seat (4) away from the fixed block (31).

7. The high temperature and high pressure forged steel butterfly valve according to claim 6, characterized in that: The fixed block (31) is provided with a sliding hole (311) along the axial direction of the valve body (1), and a plurality of groups of the sliding holes (311) are arranged in a circular array along the axial direction of the valve body (1), and the pressure-retaining spring (521) and the abutment block are both arranged in the sliding holes (311).

8. The high temperature and high pressure forged steel butterfly valve according to claim 1, characterized in that: The valve body (1) is provided with a plurality of groups of heat dissipation fins (6) for reducing the temperature of the valve body (1).

9. The high temperature and high pressure forged steel butterfly valve according to claim 1, characterized in that: A valve stem (14) for controlling the rotation of the disc plate (2) is rotatably arranged on the valve body (1), and the valve stem (14) and the disc plate (2) are eccentrically arranged.

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