Low torque ball valve for metallurgy

Abstract

The application provides a metallurgical wear-resistant low-torque ball valve and relates to the technical field of ball valves.The metallurgical wear-resistant low-torque ball valve comprises an outlet valve seat, the side surface of the outlet valve seat is fixedly connected with an inlet valve seat, the side surface of a rectangular groove of the outlet valve seat is provided with a circular groove, the cylindrical surface of a cylindrical groove of the outlet valve seat is slidably connected with a first compression sleeve, the first compression sleeve is a stepped cylinder, and the side surface of a large cylinder of the first compression sleeve is fixedly connected with a sliding sleeve.By increasing the pressure in a closed space composed of a gas pump, a circular groove, a second sealing ring, a third sealing ring, a vent hole and a sliding sleeve, the sliding sleeve drives the first compression sleeve to extrude a valve ball, so that the forces on both ends of the valve ball are the same when the ball valve is closed, and the problem that the sealing structure between a valve rod and a valve rod positioning hole is damaged due to the fact that the pressure on one side of the valve ball is greater than that on the other side when the ball valve is closed, thereby causing the leakage of the ball valve, is solved.

Description

Technical Field

[0001] This invention relates to the field of ball valve technology, specifically to a wear-resistant, low-torque ball valve for metallurgical applications. Background Technology

[0002] Ball valves are mainly used in pipelines for shut-off, distribution, and changing the flow direction of media. Due to their low fluid resistance, simple structure, isolation of the sealing surfaces of the ball and seat from the media, smooth and flat flow path that prevents media deposition, and suitability for both general working media and media under harsh conditions, ball valves are widely used in various fields such as petroleum, chemical, power generation, papermaking, nuclear energy, aviation, and rocketry, as well as in daily life.

[0003] In existing ball valve structures, the valve stem is positioned on the valve seat and can only rotate within the positioning hole, while the valve ball is floating. When the ball valve is in the closed position, the medium at the valve inlet compresses the valve ball, causing the pressure at the inlet to be greater than the pressure on the other side. The valve ball tends to shift towards the side with lower pressure, but the valve stem does not adapt to this shift, resulting in a lateral shear stress on the end of the valve stem connected to the valve ball. Over time, this shear stress can damage the sealing structure between the valve stem and the valve stem positioning hole, causing leakage in the ball valve. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a wear-resistant, low-torque ball valve for metallurgy, which solves the problem of leakage caused by the valve valve leaking when the pressure on one side of the ball is greater than that on the other side, resulting in damage to the sealing structure between the valve stem and the valve stem positioning hole.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a wear-resistant, low-torque ball valve for metallurgy, comprising an outlet valve seat, an inlet valve seat fixedly connected to the side surface of the outlet valve seat, a rectangular groove near the inlet valve seat, a cylindrical groove on the side surface of the rectangular groove of the outlet valve seat, a through cylindrical flow channel on the side surface of the cylindrical groove of the outlet valve seat, and an annular groove on the side surface of the rectangular groove of the outlet valve seat, the annular groove surrounding the cylindrical groove of the outlet valve seat. A first clamping sleeve is slidably connected to the cylindrical surface of the cylindrical groove of the outlet valve seat, the first clamping sleeve being a stepped cylinder, the larger cylindrical end of the first clamping sleeve being within the rectangular groove of the outlet valve seat, a sliding sleeve fixedly connected to the larger cylindrical side surface of the first clamping sleeve, the sliding sleeve sliding within the annular groove, a vent hole on the upper surface of the outlet valve seat communicating with the annular groove, and an air pump fixedly connected to the upper surface of the outlet valve seat, the output end of the air pump being connected to the vent hole. The circular groove is designed to facilitate the sliding of the sleeve within it. The first clamping sleeve is designed to facilitate the clamping of the valve ball. The air pump is designed to facilitate the change of air pressure within the sealed space formed by the air pump, the circular groove, the second sealing ring, the third sealing ring, the vent hole, and the sleeve, thereby driving the movement of the sleeve.

[0006] Preferably, an outlet end spring is fixedly connected to the side surface of the cylindrical groove of the outlet valve seat, and the other end of the outlet end spring is fixedly connected to the side surface of the small cylindrical end of the first clamping sleeve. An annular groove is provided on the outer cylindrical surface of the small cylindrical end of the first clamping sleeve, and a fourth sealing ring is fixedly connected to the cylindrical surface of the annular groove. The outer cylindrical surface of the fourth sealing ring and the cylindrical surface of the cylindrical groove of the outlet valve seat are in close contact. The outlet end spring is provided to facilitate the use of its own elastic force to push the first clamping sleeve and the valve ball surface into close contact.

[0007] Preferably, the inner and outer cylindrical surfaces of the sliding sleeve are respectively provided with annular grooves. A third sealing ring is fixedly connected to the annular groove surface of the inner cylindrical surface of the sliding sleeve, and the third sealing ring is in close contact with the cylindrical surface of the smaller annular groove. A second sealing ring is fixedly connected to the annular groove surface of the outer cylindrical surface of the sliding sleeve, and the second sealing ring is in close contact with the cylindrical surface of the larger annular groove. The second and third sealing rings are provided to facilitate the prevention of gas leakage from the sealed space formed by the air pump, the annular groove, the second sealing ring, the third sealing ring, the vent hole, and the sliding sleeve.

[0008] Preferably, the inlet valve seat has a rectangular groove near the outlet valve seat, and a cylindrical groove is provided on the side surface of the rectangular groove of the inlet valve seat. A through flow channel is provided on the side surface of the cylindrical groove of the inlet valve seat, and a second clamping sleeve is slidably connected to the cylindrical surface of the cylindrical groove of the inlet valve seat. The second clamping sleeve is provided to facilitate tight contact with the surface of the valve ball.

[0009] Preferably, the outer cylindrical surface of the second clamping sleeve is provided with an annular groove, and a fifth sealing ring is fixedly connected to the annular groove surface of the second clamping sleeve. The fifth sealing ring is in close contact with the cylindrical surface of the cylindrical groove of the inlet valve seat. An inlet end spring is fixedly connected to the side surface of the cylindrical groove of the inlet valve seat, and the other end of the inlet end spring is fixedly connected to the side surface of the second clamping sleeve. The inlet end spring is provided to facilitate pushing the second clamping sleeve towards the valve ball by its own elastic force.

[0010] Preferably, a first sealing ring is fixedly connected to the top of the connection between the inlet valve seat and the outlet valve seat. The first sealing ring passes through the inlet valve seat and the outlet valve seat, and a circular hole is provided in the center of the first sealing ring. The circular hole of the first sealing ring is slidably connected to a rotating shaft. The rotating shaft is provided to facilitate the rotation of the valve ball.

[0011] Preferably, a valve ball is fixedly connected to the bottom end of the rotating shaft. The valve ball is located within the space formed by the rectangular grooves of the inlet valve seat and the outlet valve seat. The surface of the valve ball is in close contact with the side surfaces of the first and second clamping sleeves, respectively. A water pressure detector is fixedly connected to the cylindrical surface of the inlet valve seat. The detection probe of the water pressure detector extends into the through-flow channel of the inlet valve seat. There is no gap between the water pressure detector and the inlet valve seat. The water pressure detector is provided to facilitate understanding the pressure borne by the valve ball at the end with the medium when the ball valve is closed.

[0012] Preferably, a support plate is fixedly connected to the upper surface of the inlet valve seat, and a fixing plate is fixedly connected to the upper surface of the support plate. The fixing plate has a through circular hole, and a bearing is fixedly connected to the cylindrical surface of the through circular hole of the fixing plate. The inner cylindrical surface of the bearing is fixedly connected to the cylindrical surface of the rotating shaft. The bearing is provided to facilitate fixing the position of the rotating shaft and to facilitate its rotation.

[0013] Preferably, a rotating wheel is fixedly connected to the upper surface of the rotating shaft. The rotating wheel itself has two positioning holes. A positioning base is fixedly connected to the upper surface of the fixed plate. The upper surface of the positioning base has a circular hole. A locking rod is slidably connected to the circular hole of the positioning base, and the locking rod passes through one of the positioning holes. The rotating wheel is provided to facilitate the rotation of the rotating shaft. The positioning holes are provided to facilitate the quick determination of the position to which the rotating wheel should rotate when the ball valve is open or closed. The positioning base is provided to facilitate the insertion of the locking rod. The locking rod is provided to facilitate the prevention of rotation of the rotating shaft.

[0014] Working principle: When the ball valve needs to be closed, rotate the wheel to the corresponding position and insert the locking rod into the round hole of the positioning base. At this time, the insertion end of the locking rod passes through the positioning hole corresponding to the ball valve when it is closed. Then, read the reading on the water pressure detector to confirm the air pressure intensity required by the sealed space composed of the air pump, annular groove, second sealing ring, third sealing ring, vent hole, and sliding sleeve. Then, start the air pump to inject gas into the sealed space composed of the air pump, annular groove, second sealing ring, third sealing ring, vent hole, and sliding sleeve until the required pressure intensity is reached. At this time, the sliding sleeve is pushed by the air pressure, which drives the first extrusion sleeve fixedly connected to the sliding sleeve to press against the valve ball. This thrust is the same as the thrust of the medium in the inlet valve seat that extrudes the valve ball, avoiding the problem of the pressure on one side of the valve ball being greater than that on the other side when the ball valve is closed, which would damage the sealing structure between the valve stem and the valve stem positioning hole and cause leakage of the ball valve.

[0015] This invention provides a wear-resistant, low-torque ball valve for metallurgical applications. It offers the following advantages:

[0016] 1. When the ball valve is closed, the force on both ends of the ball is the same, which solves the problem that when the ball valve is closed, the pressure on one side of the ball is greater than that on the other side, which causes damage to the sealing structure between the valve stem and the valve stem positioning hole, thus causing leakage of the ball valve.

[0017] 2. The combination of positioning hole, positioning base, and locking rod can quickly position and fix the rotary wheel, ensuring the accuracy of the ball's stopping position when the ball valve is opened or closed. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a wear-resistant, low-torque ball valve for metallurgy proposed in this invention.

[0019] Figure 2 This is a cross-sectional view of the overall structure of a wear-resistant, low-torque ball valve for metallurgy proposed in this invention.

[0020] Figure 3 This is a cross-sectional view of the mounting position of the positioning base of a metallurgical wear-resistant low-torque ball valve proposed in this invention;

[0021] Figure 4 This is a cross-sectional view of the outlet valve seat portion of a metallurgical wear-resistant low-torque ball valve proposed in this invention.

[0022] Figure 5 This is a partial enlarged view of section A in the cross-sectional view of the outlet valve seat portion of a metallurgical wear-resistant low-torque ball valve proposed in this invention.

[0023] Figure 6 This is a cross-sectional view of the inlet seat portion of a wear-resistant, low-torque ball valve for metallurgy proposed in this invention.

[0024] The components are as follows: 1. Outlet valve seat; 2. Inlet valve seat; 3. Water pressure detector; 4. Support plate; 5. Fixing plate; 6. Rotary shaft; 7. Rotary wheel; 8. Positioning base; 9. Locking rod; 10. Air pump; 11. Positioning hole; 12. Bearing; 13. First sealing ring; 14. Sliding sleeve; 15. Valve ball; 16. First clamping sleeve; 17. Circular groove; 18. Second sealing ring; 19. Third sealing ring; 20. Fourth sealing ring; 21. Inlet end spring; 22. Fifth sealing ring; 23. Second clamping sleeve; 24. Vent hole; 25. Outlet end spring. Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0026] like Figure 1-6As shown, this embodiment of the invention provides a wear-resistant, low-torque ball valve for metallurgy, including an outlet valve seat 1. An inlet valve seat 2 is fixedly connected to the side surface of the outlet valve seat 1. A rectangular groove is provided on the outlet valve seat 1 near the inlet valve seat 2. A cylindrical groove is provided on the side surface of the rectangular groove of the outlet valve seat 1. A through cylindrical flow channel is provided on the side surface of the cylindrical groove of the outlet valve seat 1. An annular groove 17 is provided on the side surface of the rectangular groove of the outlet valve seat 1. The annular groove 17 surrounds the outside of the cylindrical groove of the outlet valve seat 1. A first clamping device is slidably connected to the cylindrical surface of the cylindrical groove of the outlet valve seat 1. The first clamping sleeve 16 is a stepped cylinder. The large cylindrical end of the first clamping sleeve 16 is in the rectangular groove of the outlet valve seat 1. The large cylindrical side surface of the first clamping sleeve 16 is fixedly connected to the sliding sleeve 14, which slides in the annular groove 17. The upper surface of the outlet valve seat 1 is provided with a vent hole 24, which is connected to the annular groove 17. The upper surface of the outlet valve seat 1 is fixedly connected to the air pump 10, and the output end of the air pump 10 is connected to the vent hole 24. There is no gap between the surface of the air pump 10 and the vent hole 24. The diameter of the first clamping sleeve 16 is larger than the diameter of the valve ball 15.

[0027] The outlet end spring 25 is fixedly connected to the side surface of the cylindrical groove of the outlet valve seat 1. The other end of the outlet end spring 25 is fixedly connected to the side surface of the small cylindrical end of the first compression sleeve 16. The outer cylindrical surface of the small cylindrical end of the first compression sleeve 16 is provided with an annular groove. The cylindrical surface of the annular groove of the small cylindrical end of the first compression sleeve 16 is fixedly connected to the fourth sealing ring 20. The outer cylindrical surface of the fourth sealing ring 20 is in close contact with the cylindrical surface of the cylindrical groove of the outlet valve seat 1. The inner and outer cylindrical surfaces of the sliding sleeve 14 are respectively provided with annular grooves. The annular groove surface of the inner cylindrical surface of the sliding sleeve 14 is fixedly connected to the third sealing ring 19. The third sealing ring 19 is in close contact with the smaller cylindrical surface of the annular groove 17. The annular groove surface of the outer cylindrical surface of the sliding sleeve 14 is fixedly connected to the second sealing ring 18. The second sealing ring 18 is in close contact with the larger cylindrical surface of the annular groove 17. The outlet end spring 25 and the inlet end spring 21 have the same specifications and are always under a large pressure.

[0028] A rectangular groove is provided near the outlet valve seat 1 on the inlet valve seat 2. A cylindrical groove is provided on the side surface of the rectangular groove of the inlet valve seat 2. A through flow channel is provided on the side surface of the cylindrical groove of the inlet valve seat 2. A second clamping sleeve 23 is slidably connected to the cylindrical surface of the cylindrical groove of the inlet valve seat 2. An annular groove is provided on the outer cylindrical surface of the second clamping sleeve 23. A fifth sealing ring 22 is fixedly connected to the annular groove surface of the second clamping sleeve 23. The fifth sealing ring 22 and the cylindrical surface of the cylindrical groove of the inlet valve seat 2 are in close contact. An inlet end spring 21 is fixedly connected to the side surface of the cylindrical groove of the inlet valve seat 2. The other end of the inlet end spring 21 is fixedly connected to the side surface of the second clamping sleeve 23. The orifice of the second clamping sleeve 23 is larger than the orifice of the valve ball 15.

[0029] A support plate 4 is fixedly connected to the upper surface of the inlet valve seat 2. A fixing plate 5 is fixedly connected to the upper surface of the support plate 4. The fixing plate 5 has a through circular hole. A bearing 12 is fixedly connected to the cylindrical surface of the through circular hole of the fixing plate 5. The inner cylindrical surface of the bearing 12 is fixedly connected to the cylindrical surface of the rotating shaft 6. A rotating wheel 7 is fixedly connected to the upper surface of the rotating shaft 6. The rotating wheel 7 itself has two positioning holes 11. A positioning base 8 is fixedly connected to the upper surface of the fixing plate 5. The upper surface of the positioning base 8 has a circular hole. The locking rod 9 is slidably connected to the round hole. The locking rod 9 passes through one of the positioning holes 11. The center lines of the rotating wheel 7 and the rotating shaft 6 coincide. The distances from the two positioning holes 11 to the center line of the rotating wheel 7 are the same, and the angle between the two positioning holes 11 and the center line of the rotating wheel 7 is 90 degrees. The two positioning holes 11 are marked with open and closed indicators respectively. The diameter of the round hole on the positioning base 8, the diameter of the positioning hole 11, and the diameter of the insertion end of the locking rod 9 are all the same. When the round hole on the positioning base 8 and the positioning hole 11 coincide, the ball valve is in the closed or open state.

[0030] A first sealing ring 13 is fixedly connected to the top of the connection between the inlet valve seat 2 and the outlet valve seat 1. The first sealing ring 13 passes through the inlet valve seat 2 and the outlet valve seat 1. A circular hole is provided in the center of the first sealing ring 13. The circular hole of the first sealing ring 13 is slidably connected to the rotating shaft 6. The bottom end of the rotating shaft 6 is fixedly connected to the valve ball 15. The valve ball 15 is in the space formed by the rectangular grooves of the inlet valve seat 2 and the outlet valve seat 1. The surface of the valve ball 15 is in close contact with the side surfaces of the first clamping sleeve 16 and the second clamping sleeve 23, respectively. A water pressure detector 3 is fixedly connected to the cylindrical surface of the inlet valve seat 2. The detection probe of the water pressure detector 3 extends into the through flow channel of the inlet valve seat 2. There is no gap at the connection between the water pressure detector 3 and the inlet valve seat 2.

[0031] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A wear-resistant, low-torque ball valve for metallurgy, comprising an outlet valve seat (1), characterized in that: The outlet valve seat (1) is fixedly connected to the inlet valve seat (2) on its side surface. The outlet valve seat (1) is provided with a rectangular groove near the inlet valve seat (2). The rectangular groove side surface of the outlet valve seat (1) is provided with a cylindrical groove. The cylindrical groove side surface of the outlet valve seat (1) is provided with a through cylindrical flow channel. The rectangular groove side surface of the outlet valve seat (1) is provided with an annular groove (17). The annular groove (17) is around the outside of the cylindrical groove of the outlet valve seat (1). The cylindrical surface of the cylindrical groove of the outlet valve seat (1) is slidably connected to a first clamping sleeve (16). The first clamping sleeve (16) is a stepped cylinder. The large cylindrical end of the first clamping sleeve (16) is inside the rectangular groove of the outlet valve seat (1). The large cylindrical side surface of the first clamping sleeve (16) is fixedly connected to a sliding sleeve (14). The sliding sleeve (14) is in the annular groove. (17) Sliding inside, the upper surface of the outlet valve seat (1) is provided with a vent hole (24), the vent hole (24) and the annular groove (17) are connected, the upper surface of the outlet valve seat (1) is fixedly connected to an air pump (10), the output end of the air pump (10) is connected to the vent hole (24); the side surface of the cylindrical groove of the outlet valve seat (1) is fixedly connected to the outlet end spring (25), the other end of the outlet end spring (25) is fixedly connected to the side surface of the small cylindrical end of the first compression sleeve (16), the outer cylindrical surface of the small cylindrical end of the first compression sleeve (16) is provided with an annular groove, the cylindrical surface of the annular groove of the small cylindrical end of the first compression sleeve (16) is fixedly connected to the fourth sealing ring (20), the outer cylindrical surface of the fourth sealing ring (20) and the cylindrical surface of the cylindrical groove of the outlet valve seat (1) are in close contact.

2. The wear-resistant, low-torque ball valve for metallurgy according to claim 1, characterized in that: The inner and outer cylindrical surfaces of the sliding sleeve (14) are respectively provided with annular grooves. The annular groove surface of the inner cylindrical surface of the sliding sleeve (14) is fixedly connected to a third sealing ring (19). The third sealing ring (19) and the smaller cylindrical surface of the annular groove (17) are in close contact. The annular groove surface of the outer cylindrical surface of the sliding sleeve (14) is fixedly connected to a second sealing ring (18). The second sealing ring (18) and the larger cylindrical surface of the annular groove (17) are in close contact.

3. The wear-resistant, low-torque ball valve for metallurgy according to claim 1, characterized in that: The inlet valve seat (2) is provided with a rectangular groove near the outlet valve seat (1). The side surface of the rectangular groove of the inlet valve seat (2) is provided with a cylindrical groove. The side surface of the cylindrical groove of the inlet valve seat (2) is provided with a through flow channel. The cylindrical surface of the cylindrical groove of the inlet valve seat (2) is slidably connected to the second clamping sleeve (23).

4. The wear-resistant, low-torque ball valve for metallurgy according to claim 3, characterized in that: The outer cylindrical surface of the second clamping sleeve (23) is provided with an annular groove. The surface of the annular groove of the second clamping sleeve (23) is fixedly connected to the fifth sealing ring (22). The fifth sealing ring (22) and the cylindrical surface of the cylindrical groove of the inlet valve seat (2) are in close contact. The side surface of the cylindrical groove of the inlet valve seat (2) is fixedly connected to the inlet end spring (21). The other end of the inlet end spring (21) is fixedly connected to the side surface of the second clamping sleeve (23).

5. A wear-resistant, low-torque ball valve for metallurgy according to claim 3, characterized in that: The first sealing ring (13) is fixedly connected to the top of the connection between the inlet valve seat (2) and the outlet valve seat (1). The first sealing ring (13) passes through the inlet valve seat (2) and the outlet valve seat (1). A round hole is provided in the center of the first sealing ring (13). The round hole of the first sealing ring (13) is slidably connected to the rotating shaft (6).

6. The wear-resistant, low-torque ball valve for metallurgy according to claim 5, characterized in that: The bottom end of the rotating shaft (6) is fixedly connected to the valve ball (15). The valve ball (15) is in the space formed by the rectangular groove of the inlet valve seat (2) and the outlet valve seat (1). The surface of the valve ball (15) is in close contact with the side surfaces of the first clamping sleeve (16) and the second clamping sleeve (23), respectively. The cylindrical surface of the inlet valve seat (2) is fixedly connected to the water pressure detector (3). The detection probe of the water pressure detector (3) extends into the through flow channel of the inlet valve seat (2). There is no gap at the connection between the water pressure detector (3) and the inlet valve seat (2).

7. A wear-resistant, low-torque ball valve for metallurgy according to claim 5, characterized in that: The upper surface of the inlet valve seat (2) is fixedly connected to the support plate (4), the upper surface of the support plate (4) is fixedly connected to the fixing plate (5), the fixing plate (5) is provided with a through circular hole, the cylindrical surface of the through circular hole of the fixing plate (5) is fixedly connected to the bearing (12), and the inner cylindrical surface of the bearing (12) and the cylindrical surface of the rotating shaft (6) are fixedly connected.

8. A wear-resistant, low-torque ball valve for metallurgy according to claim 7, characterized in that: The upper surface of the rotating shaft (6) is fixedly connected to the rotating wheel (7), the rotating wheel (7) itself is provided with positioning holes (11), there are two positioning holes (11), the upper surface of the fixing plate (5) is fixedly connected to the positioning base (8), the upper surface of the positioning base (8) is provided with a round hole, the round hole of the positioning base (8) is slidably connected to the locking rod (9), and the locking rod (9) passes through one of the positioning holes (11).

Images