An integrated top drive plug valve

Abstract

The utility model relates to the technical field of plug valve discloses an integrated top drive plug valve, including the valve shell and the connector of valve shell one end integrated setting, the inside rotation of valve shell is installed with the valve core, both sides of valve shell are located the upper and lower positions of valve core respectively and all are seted up with the pressure relief mouth, the position of valve shell is fixed with pressure relief assembly opposite pressure relief mouth. This integrated top drive plug valve, through before the plug valve opening and closing, through built -in pressure relief passage initiative release high pressure fluid in valve cavity, directly eliminate high pressure fluid to the radial pressure force of pair, significantly improve the plug valve switch convenience, dynamic pressure unloading, and, pressure relief mechanism avoids the extrusion wear of sealing surface under high pressure forced rotation, reduces the execution mechanism load simultaneously, effectively prolongs the service life of key components.

Description

Technical Field

[0001] This utility model relates to the field of plug valve technology, and in particular to an integrated top-drive plug valve. Background Technology

[0002] In the fields of oil and gas extraction and high-pressure fluid transportation, plug valves are critical control components, and their reliability directly affects the safe operation of the system. Under high-pressure conditions, traditional plug valves experience significant axial loads due to the liquid pressure within the valve chamber, which acts on the sealing surface between the valve core and the valve body, leading to a sharp increase in the valve core's rotational resistance. Especially in scenarios such as ultra-deep well drilling and high-pressure water injection, fluid pressures can reach tens of megapascals, requiring operators to apply several times the torque of conventional conditions manually or via a drive device to open and close the plug valve. This not only increases equipment energy consumption and wear on drive components but also poses a risk of valve core jamming and seal failure due to insufficient torque.

[0003] In the existing technology, some plug valves overcome high pressure resistance by increasing the power of the drive motor or using a hydraulic assist device. However, such solutions have drawbacks such as complex structure, high energy consumption, and slow response. The ease of valve opening and closing is still limited by the system pressure. Utility Model Content

[0004] In view of the problem that the driving torque required for the rotation of the existing valve core increases sharply with the increase of system pressure, this utility model is proposed.

[0005] Therefore, the purpose of this utility model is to provide an integrated top-drive plug valve, which aims to reduce the influence of pressure on valve opening and closing.

[0006] To solve the above technical problems, this utility model provides the following technical solution: an integrated top-drive plug valve, including a valve shell and a connector integrally formed at one end of the valve shell, a valve core is rotatably installed inside the valve shell, and pressure relief ports are opened on both sides of the valve shell at the upper and lower positions of the valve core, respectively, and a pressure relief component is fixed at the position of the valve shell facing the pressure relief port.

[0007] The pressure relief assembly includes a horizontal connecting pipe fixed to the valve housing. A vertical connecting pipe is integrally formed at the end of the horizontal connecting pipe away from the valve housing. An end cap is detachably installed at the end of the vertical connecting pipe away from the horizontal connecting pipe. A piston head is provided inside the vertical connecting pipe. A lifting structure for driving the piston head to rise and fall is installed inside the vertical connecting pipe and between the piston head and the end cap.

[0008] As an improved technical solution, a rotating cavity communicating with the inside of the valve housing is provided on one side of the valve housing and at the position of the middle of the side of the valve core. A rotary joint that rotates inside the rotating cavity is fixed on the side of the valve core near the rotating cavity.

[0009] As an improved technical solution, a discharge hole is provided on the periphery of the vertical connecting pipe and on the side away from the valve body, and a connecting pipe is welded to the vertical connecting pipe at the position opposite to the discharge hole.

[0010] As an improved technical solution, the lifting structure includes a lead screw rotatably mounted at the center of the end cover, a U-shaped frame threaded onto the lead screw, and a piston head fixed at the end of the U-shaped frame away from the end cover. The U-shaped frame is vertically limited and slidably mounted inside the vertical connecting pipe. A threaded hole for threaded connection with the lead screw is opened at the bottom of the U-shaped frame. A servo motor for driving the lead screw to rotate is fixed at the bottom of the end cover, and the driving end of the servo motor is connected to the bottom end of the lead screw.

[0011] As an improved technical solution, guide strips are fixed inside the vertical connecting pipe and on both sides near the end cap, and slides for sliding the guide strips are provided on both sides of the U-shaped frame.

[0012] After adopting the above technical solution, the beneficial effects of this utility model are:

[0013] This invention actively releases the high-pressure fluid in the valve chamber through a built-in pressure relief channel before the plug valve is opened or closed, directly eliminating the radial clamping force of the high-pressure fluid, significantly improving the ease of opening and closing the plug valve, dynamically unloading pressure, greatly reducing the operating torque, and the pressure relief mechanism avoids the squeezing and wear of the sealing surface caused by forced rotation under high pressure, while reducing the load on the actuator and effectively extending the service life of key components. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0015] Fig. 1 This is a schematic diagram of the overall structure of an integrated top-drive plug valve according to the present invention.

[0016] Fig. 2 This is a partial cross-sectional view of the valve shell of an integrated top-drive plug valve according to this utility model.

[0017] Fig. 3 This is a cross-sectional view of the pressure relief assembly of an integrated top-drive plug valve according to this utility model.

[0018] Explanation of reference numerals in the attached figures:

[0019] 1. Valve housing; 2. Connector; 3. Rotary chamber; 4. Rotary joint; 5. Pressure relief assembly; 51. Horizontal connecting pipe; 52. Vertical connecting pipe; 53. Exhaust port; 54. U-shaped bracket; 55. Guide bar; 56. Lead screw; 57. End cap; 58. Servo motor; 59. Connecting pipe; 510. Piston head; 6. Valve core; 7. Pressure relief port. Detailed Implementation

[0020] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Example

[0021] Reference Figs. 1-3 The first embodiment of this utility model provides an integrated top-drive plug valve. This integrated top-drive plug valve includes a valve shell 1 and a connector 2 integrally formed at one end of the valve shell 1. A valve core 6 is rotatably installed inside the valve shell 1. Pressure relief ports 7 are provided on both sides of the valve shell 1 at the upper and lower positions of the valve core 6, respectively. A pressure relief component 5 is fixed at the position of the valve shell 1 directly opposite the pressure relief port 7.

[0022] The pressure relief assembly 5 includes a horizontal connecting pipe 51 fixed on the valve housing 1. A vertical connecting pipe 52 is integrally formed at the end of the horizontal connecting pipe 51 away from the valve housing 1. An end cap 57 is detachably installed at the end of the vertical connecting pipe 52 away from the horizontal connecting pipe 51. A piston head 510 is provided inside the vertical connecting pipe 52. A lifting structure for driving the piston head 510 to move up and down is installed inside the vertical connecting pipe 52 and between the piston head 510 and the end cap 57. When the piston head 510 moves toward the end cap 57, it expands the space in which the solution can move inside the vertical connecting pipe 52, which helps to reduce the internal pressure of the valve housing 1. At the same time, it synchronously drives the valve core 6 to rotate, reducing the torque required to drive the valve core 6 to rotate.

[0023] Before the plug valve opens and closes, the high-pressure fluid in the valve chamber is actively released through the built-in pressure relief channel, directly eliminating the radial clamping force of the high-pressure fluid on 6, significantly improving the convenience of opening and closing the plug valve, dynamically unloading pressure, greatly reducing the operating torque, and the pressure relief mechanism avoids the sealing surface squeezing and wear caused by the forced rotation of 6 under high pressure, while reducing the load on the actuator and effectively extending the service life of key components.

[0024] A rotating cavity 3, which is connected to the inside of the valve housing 1, is provided on one side of the valve housing 1 at the position of the middle of the side of the valve core 6. A rotary joint 4, which rotates inside the rotating cavity 3, is fixed on the side of the valve core 6 near the rotating cavity 3.

[0025] A discharge port 53 is provided on the periphery of the vertical connecting pipe 52 and on the side away from the valve body 1. A connecting pipe 59 is welded to the vertical connecting pipe 52 at the position directly opposite the discharge port 53.

[0026] The lifting structure includes a lead screw 56 rotatably mounted at the center of the end cover 57. A U-shaped frame 54 is threadedly mounted on the lead screw 56, and a piston head 510 is fixed at the end of the U-shaped frame 54 away from the end cover 57. The U-shaped frame 54 is vertically limited and slidably mounted inside the vertical connecting pipe 52. A threaded hole is opened at the bottom of the U-shaped frame 54 for threaded connection with the lead screw 56. A servo motor 58 for driving the lead screw 56 to rotate is fixed at the bottom of the end cover 57, and the driving end of the servo motor 58 is connected to the bottom end of the lead screw 56. The piston head 510 is moved by the lead screw. When the internal pressure of the valve body 1 is too high, it helps to keep the piston head 510 stationary.

[0027] Guide strips 55 are fixed inside the vertical connecting pipe 52 and on both sides near the end cap 57. Slides for sliding the guide strips 55 are provided on both sides of the U-shaped frame 54.

[0028] The working principle of this utility model is as follows: When it is necessary to control the rotation of the valve core 6 through the rotary joint 4, the servo motor 58 drives the lead screw 56 to continue rotating. Under the thread transmission action of the lead screw 56 and the threaded hole on the U-shaped frame 54, the U-shaped frame 54 moves towards the end cover 57 along the guide bar 55, which causes the piston head 510 to move towards the end cover 57. When the piston head 510 moves towards the end cover 57, the space in which the solution can move inside the vertical connecting pipe 52 is expanded, which helps to reduce the internal pressure of the valve body 1.

[0029] When the piston head 510 is moved below the discharge hole 53, the interior of the vertical connecting pipe 52 is connected to the connecting pipe 59, and the liquid can be discharged directly to the outside through the connecting pipe 59, which further effectively relieves the pressure inside the valve body 1, further reduces the torque required to drive the valve core 6 to rotate, and ensures that the valve core 6 rotates smoothly and conveniently.

[0030] Furthermore, when no pressure relief is required, the piston head 510 is reset.

[0031] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An integrated top-drive plug valve, comprising a valve housing (1) and a connector (2) integrally formed at one end of the valve housing (1), characterized in that: The valve core (6) is rotatably installed inside the valve housing (1). Pressure relief ports (7) are provided on both sides of the valve housing (1) and at the upper and lower positions of the valve core (6). A pressure relief assembly (5) is fixed on the valve housing (1) directly opposite the pressure relief port (7). The pressure relief assembly (5) includes a horizontal connecting pipe (51) fixed on the valve housing (1). A vertical connecting pipe (52) is integrally formed at one end of the horizontal connecting pipe (51) away from the valve housing (1). An end cap (57) is detachably installed at one end of the vertical connecting pipe (52) away from the horizontal connecting pipe (51). A piston head (510) is provided inside the vertical connecting pipe (52). A lifting structure for driving the piston head (510) to rise and fall is installed inside the vertical connecting pipe (52) and between the piston head (510) and the end cap (57).

2. The integrated top-drive plug valve according to claim 1, characterized in that: A rotating cavity (3) communicating with the inside of the valve housing (1) is provided on one side of the valve housing (1) and at the middle of the side of the valve core (6). A rotating joint (4) that rotates inside the rotating cavity (3) is fixed on the side of the valve core (6) near the rotating cavity (3).

3. The integrated top-drive plug valve according to claim 2, characterized in that: The vertical connecting pipe (52) has a discharge hole (53) on its periphery and away from the valve body (1), and a connecting pipe (59) is welded to the vertical connecting pipe (52) at the position opposite to the discharge hole (53).

4. The integrated top-drive plug valve according to claim 3, characterized in that: The lifting structure includes a lead screw (56) rotatably mounted at the center of the end cover (57), a U-shaped frame (54) threadedly mounted on the lead screw (56), and a piston head (510) fixed at the end of the U-shaped frame (54) away from the end cover (57). The U-shaped frame (54) is vertically limited and slidably mounted inside the vertical connecting pipe (52). The bottom of the U-shaped frame (54) is provided with a threaded hole that is threadedly connected to the lead screw (56). The bottom of the end cover (57) is fixed with a servo motor (58) for driving the lead screw (56) to rotate, and the driving end of the servo motor (58) is connected to the bottom end of the lead screw (56).

5. The integrated top-drive plug valve according to claim 4, characterized in that: Guide strips (55) are fixed inside the vertical connecting pipe (52) and on both sides near the end cap (57). Slides for sliding the guide strips (55) are provided on both sides of the U-shaped frame (54).

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