High-strength high-precision top drive plug valve

Abstract

The utility model relates to a high-strength high-precision top drive plug valve, it includes the body (1), the body (1) is equipped with upper valve seat (2), ball valve (3) and lower valve seat (4), and the body (1) is equipped with control hole (11) respectively on the diametrically opposite side wall of corresponding position of ball valve (3), each control hole (11) is equipped with fixed bushing (5) respectively, each fixed bushing (5) is equipped with rotating pin (6) respectively, each fixed bushing (5) is equipped with rotating pin limit block (51) respectively on the end face of body (1) outside, each rotating pin (6) is equipped with the locating block (61) that cooperates with the rotating pin limit block (51) on fixed bushing (5) respectively on the end face of body (1) outside. It is more higher in strength, is not easy to damage, and the service life is longer, and control is more accurate. Rotating pin can drive ball valve rotation 90 degrees accurately, makes ball valve switch position more accurate.

Description

Technical Field

[0001] This utility model relates to petroleum tools, specifically to a high-strength, high-precision top-drive plug valve. Background Technology

[0002] Top drive systems are essential equipment in drilling operations. Conventional top drives typically use an electric or hydraulic motor to drive a gear reducer, which in turn drives the spindle for rotary drilling. Existing oil drilling top drive systems have built-in blowout preventers. During normal drilling, the top drive stopcock valve must first be opened before starting the drilling pump to establish drilling fluid circulation. During stand connection and tripping operations, the top drive stopcock valve must be closed to prevent drilling fluid from spraying from the top drive drill string onto the drill table. However, the deep grooves machined into the valve body to serve as the locating surface for the rotating pin significantly affect the valve's strength. During use, punctures and cracks are prone to occur near the rotating pin, leading to valve damage. Therefore, frequent valve replacement is necessary, which is not only troublesome but also time-consuming and labor-intensive. Summary of the Invention

[0003] The purpose of this invention is to provide a high-strength, high-precision top-drive plug valve that is stronger, less prone to damage, has a longer service life, and provides more precise control.

[0004] The technical solution of this utility model is as follows: It includes a main body, in which an upper valve seat, a ball valve, and a lower valve seat are respectively arranged from top to bottom. Control holes are respectively provided on the radially opposite side walls of the main body corresponding to the ball valve. A fixed bushing with an outer wall that seals with the inner wall of the control hole is installed in each control hole. A rotating pin with a rotating seal that rotates and seals with the fixed bushing to drive the ball valve to open and close is provided in each fixed bushing. A rotating pin limiting block protruding from the inner wall of the fixed bushing is provided on the end face of each fixed bushing facing the outside of the main body. A positioning block protruding from the end face of each rotating pin with the rotating pin limiting block on the fixed bushing is provided on the end face of each rotating pin facing the outside of the main body to limit the rotation angle of the rotating pin and precisely control the opening and closing position of the ball valve.

[0005] The technical advantages of this invention are: higher strength, less susceptibility to damage, longer service life, and more precise control. Because the body does not require a deep groove machined as a locating surface for the rotating pin, the body's strength is doubled, significantly enhancing the safety and reliability of the plug valve. It offers better control precision; the rotating pin can precisely drive the ball valve to rotate 90 degrees, resulting in more accurate ball valve opening and closing positions. When the ball valve is open, the concentricity between its through-hole and the body's axial direction is better, preventing tilting, reducing wear on the ball valve, and avoiding the drawback of reduced plug valve channel area due to inaccurate ball valve opening positions. Attached Figure Description

[0006] Figure 1This is an axial sectional view of an embodiment of the present utility model;

[0007] Figure 2 This is an axial view showing the fit between the rotating pin and the fixed bushing in an embodiment of this utility model. Detailed Implementation

[0008] like Figure 1 , Figure 2 As shown, it includes a body 1. Inside the body 1, from top to bottom, there are an upper valve seat 2, a ball valve 3, and a lower valve seat 4. On the radially opposite side wall of the body 1, corresponding to the ball valve 3, there are control holes 11. Each control hole 11 is fitted with a fixed bushing 5 whose outer wall seals against the inner wall of the control hole 11. Each fixed bushing 5 is fitted with a rotating pin 6 that rotates and seals against the fixed bushing 5, driving the ball valve 3 to open and close. Each fixed bushing 5 has a rotating pin limiting block 51 protruding from the inner wall of the fixed bushing 5 on its outer end face facing the body 1. Each rotating pin 6 has a positioning block 61 protruding from the end face of the rotating pin 6 on its outer end face facing the body 1, which cooperates with the rotating pin limiting block 51 on the fixed bushing 5 to limit the rotation angle of the rotating pin 6 and precisely control the opening and closing position of the ball valve 3.

[0009] The upper end of the body 1 is provided with an internal thread 12 for connecting the pipe column, the lower end is provided with an external thread 13 for connecting the pipe column, and an axial through hole 14 is provided.

[0010] Each fixed bushing 5 has a radially relative position on its end face facing outward from the body 1, and each rotating pin 6 has a radially relative position on its end face facing outward from the body 1, with a positioning block 61 located between the two rotating pin limit blocks 51. The two positioning blocks 61 ensure that the rotating pin 6 can only rotate 90 degrees between the two rotating pin limit blocks 51, thereby precisely controlling the rotation angle of the rotating pin 6 to precisely control the opening and closing position of the ball valve 3.

[0011] Each control hole 11 has an inner positioning plane on its radially opposite side on the inner wall of the end facing outward from the body 1. The outer wall of the end of the fixing bushing 5 facing outward from the body 1 has an outer positioning plane 52 that mates with the inner positioning plane on each control hole 1. The fixing bushing 5 is installed inside the control hole 11 from the inside of the body 1 outward. The outer positioning plane 52 mates with the inner positioning plane, so that the fixing bushing 5 is fixedly installed on the body 1 and will not be rotated by the rotating pin 6.

[0012] The outer wall of the fixed bushing 5 is provided with two sealing ring grooves in the circumferential direction, and a sealing ring 0 is installed in each sealing ring groove to seal against the inner wall of the control hole 11.

[0013] The outer wall of the rotating pin 6 is provided with two sealing ring grooves in the circumferential direction, and a sealing ring 0 is installed in each sealing ring groove to seal against the inner wall of the fixed bushing 5.

[0014] A sliding pad 62 is fitted on the rotating pin 6 between the end face of the fixed bushing 5 facing inwards from the body 1 and the rotating pin 6.

[0015] Each rotating pin 6 has a radially arranged locking block 63 on its end face facing the ball valve 3, and the ball valve 3 has a locking groove 31 at the position that cooperates with each rotating pin 3, which cooperates with the locking block 63 on each rotating pin 6.

[0016] The outer wall of the upper valve seat 2 is provided with two sealing ring grooves in the circumferential direction, and a sealing ring 0 that is sealed and matched with the inner wall of the body 1 is installed in each sealing ring groove.

[0017] The inner wall of the body 1 at the corresponding position at the lower end of the upper valve seat 2 is provided with a lower splicing ring groove in the circumferential direction. A lower splicing ring 7, which is composed of several pieces, is installed in the lower splicing ring groove. The outer circumference is installed in the lower splicing ring groove and the inner wall is fitted on the outside of the lower end of the upper valve seat 2. The upper end face of the lower splicing ring 7 is matched with the end face of the upper valve seat 2 facing the ball valve 3.

[0018] The inner wall of the body 1 above the upper valve seat 2 is provided with an upper splicing ring groove in the circumferential direction. An upper splicing ring 8 composed of several pieces is installed in the upper splicing ring groove. The lower end face of the upper splicing ring 8 mates with the end face of the upper valve seat 2 away from the ball valve 3. A support ring 81 is fitted inside the upper splicing ring 8. The outer wall of the support ring 8 mates with the inner wall of the upper splicing ring 8, and the lower end face mates with the end face of the upper valve seat 2 away from the ball valve 3. The inner wall of the upper splicing ring 8 above the support ring 81 is provided with an inner retaining ring groove in the circumferential direction. A retaining ring 82 is installed in the inner retaining ring groove to provide an upward upper limit for the support ring 81.

[0019] The outer wall of the lower valve seat 4 is provided with a sealing ring groove in the circumferential direction, and a one-way sealing ring 10 that seals with the inner wall of the body 1 is installed in the sealing ring groove.

[0020] A wave spring 9 is fitted at the lower end of the lower valve seat 4, with its upper end engaging with the downward-facing end face of the lower valve seat 4 and its lower end engaging with the upward-facing inner end face of the body 1.

[0021] The ball valve 3 is located between the upper valve seat 2 and the lower valve seat 4, and is installed in the body 1 through the upper connecting ring 8 and the lower connecting ring 7, and is pre-tightened by the wave spring 9.

Claims

1. A high-strength, high-precision top-drive plug valve, comprising a body (1), wherein an upper valve seat (2), a ball valve (3), and a lower valve seat (4) are respectively provided from top to bottom inside the body (1), and control holes (11) are respectively provided on the radially opposite sidewalls of the body (1) corresponding to the ball valve (3), and a fixed bushing (5) is respectively installed in each control hole (11) whose outer wall is sealed to the inner wall of the control hole (11), and a rotating pin (6) is respectively provided in each fixed bushing (5) to rotate and seal with the fixed bushing (5) and drive the ball valve (3) to open and close, characterized in that: Each fixed bushing (5) has a rotating pin limiting block (51) protruding from the inner wall of the fixed bushing (5) on the end face facing the outside of the body (1). Each rotating pin (6) has a positioning block (61) protruding from the end face of the rotating pin (6) on the end face facing the outside of the body (1) and cooperating with the rotating pin limiting block (51) on the fixed bushing (5).

2. The high-strength, high-precision top-drive plug valve as described in claim 1, characterized in that... Each of the fixed bushings (5) is provided with a rotating pin limiting block (51) at a radially relative position on the end face facing the outside of the body (1), and each of the rotating pins (6) is provided with a positioning block (61) located between the two rotating pin limiting blocks (51) at a radially relative position on the end face facing the outside of the body (1).

3. The high-strength, high-precision top-drive plug valve as described in claim 1, characterized in that... Each of the control holes (11) has an inner positioning plane on the radially opposite side of the inner wall of the end facing the outside of the body (1). The outer wall of the fixed bushing (5) facing the outside of the body (1) has an outer positioning plane (52) that matches the inner positioning plane on each control hole (11). The fixed bushing (5) is installed in the control hole (11) from the inside to the outside of the body (1).

4. The high-strength, high-precision top-drive plug valve as described in claim 1, characterized in that... The outer wall of the fixed bushing (5) is provided with two sealing ring grooves in the circumferential direction, and a sealing ring (0) that seals with the inner wall of the control hole (11) is installed in each sealing ring groove; the outer wall of the rotating pin (6) is provided with two sealing ring grooves in the circumferential direction, and a sealing ring (0) that seals with the inner wall of the fixed bushing (5) is installed in each sealing ring groove.

5. The high-strength, high-precision top-drive plug valve as described in claim 1, characterized in that... The rotating pin (6) is fitted with a sliding pad (62) located between the end face of the fixed bushing (5) facing the body (1) and the rotating pin (6).

6. The high-strength, high-precision top-drive plug valve as described in claim 1, characterized in that... Each of the rotating pins (6) has a locking block (63) radially arranged on the end face facing the ball valve (3), and the ball valve (3) has a locking groove (31) that cooperates with the locking block (63) on each rotating pin (6) at the position that cooperates with each rotating pin (6).

7. The high-strength, high-precision top-drive plug valve as described in claim 1, characterized in that... The upper valve seat (2) has two sealing ring grooves on its outer wall in the circumferential direction, and each sealing ring groove is equipped with a sealing ring (0) that seals with the inner wall of the body (1); the lower valve seat (4) has one sealing ring groove on its outer wall in the circumferential direction, and a one-way sealing ring (10) that seals with the inner wall of the body (1) is installed in the sealing ring groove.

8. The high-strength, high-precision top-drive plug valve as described in claim 1, characterized in that... The inner wall of the body (1) at the corresponding position at the lower end of the upper valve seat (2) is provided with a lower splicing ring groove in the circumferential direction. A lower splicing ring (7) composed of several pieces is installed in the lower splicing ring groove, with its outer periphery installed in the lower splicing ring groove and its inner wall fitted on the outside of the lower end of the upper valve seat (2). The upper end face of the lower splicing ring (7) is matched with the end face of the upper valve seat (2) facing the ball valve (3).

9. The high-strength, high-precision top-drive plug valve as described in claim 1, characterized in that... The inner wall of the main body (1) above the upper valve seat (2) is provided with an upper splicing ring groove in the circumferential direction. An upper splicing ring (8) composed of several pieces is installed in the upper splicing ring groove. The lower end face of the upper splicing ring (8) is matched with the end face of the upper valve seat (2) away from the ball valve (3). A support ring (81) is fitted inside the upper splicing ring (8), the outer wall of which matches the inner wall of the upper splicing ring (8) and the lower end face of which matches the end face of the upper valve seat (2) away from the ball valve (3). The inner wall of the upper splicing ring (8) above the support ring (81) is provided with an inner retaining ring groove in the circumferential direction. A retaining ring (82) that provides an upward upper limit for the support ring (81) is installed in the inner retaining ring groove.

10. The high-strength, high-precision top-drive plug valve as described in claim 1, characterized in that... The lower end of the lower valve seat (4) is fitted with a wave spring (9) whose upper end matches the downward-facing end face of the lower valve seat (4) and whose lower end matches the upward-facing inner end face of the body (1).

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