Rotary valve electric execution device for ground blowout preventer control device

Abstract

The utility model discloses a rotary valve electric execution device for a ground blowout preventer control device. The rotary valve electric execution device comprises a driver and a connector. The connector comprises a rotating shaft and a base; the driver drives the rotating shaft to rotate forwards or reversely; the base comprises a fixed disc, a connecting rod is vertically fixed to the center of the disc face of one side of the fixed disc, and a plurality of semicircular grooves with steel balls inside are evenly formed in the disc face. The rotating shaft is arranged on the outer side of the connecting rod of the base in a sleeving mode through the center through hole, a plurality of second axial through holes are evenly formed in the rotating shaft, and the other half of the steel ball is arranged in the second axial through holes. A compression spring is further arranged in the second axial through hole and pushes the steel ball to abut against the groove wall of the semicircular groove. The baffle, the thrust ball bearing and the nut are sequentially arranged on the connecting rod in a sleeving mode from the rod end of the connecting rod. The device can only depend on a power supply as a remote control power source, is high in reliability, reduces three-position four-way (hydraulic) reversing impact through the connector, and is reliable and durable.

Description

Technical Field

[0001] The utility model relates to the technical field of blowout preventers, in particular to a rotary valve electric actuator for a ground blowout preventer control device. Background Art

[0002] The ground blowout preventer control device is used in oilfield drilling / well repair operations and is an indispensable well control safety equipment. The equipment includes two modes: remote operation and short-range manual operation; among them, the valves that realize remote control are mostly "three-position four-way (liquid) rotary valves", and can be realized in any of the forms of "gas control type", "electrical control type", and "electrical control type". Specifically, the "gas control type" controls the action of the three-position four-way (liquid) rotary valve cylinder through compressed air, and the cylinder then drives the movement of the three-position four-way (liquid) rotary valve handle, thereby realizing the reversal of the three-position four-way (liquid) rotary valve; while the "electrical control type" controls the action of the three-position four-way (liquid) rotary valve cylinder through electrical signals to control the air source solenoid valve, and then the cylinder drives the movement of the three-position four-way (liquid) rotary valve handle, thereby realizing the reversal of the three-position four-way (liquid) rotary valve; the principle of the "electrical control type" is to control the action of the traction electromagnet through electrical signals and drive the movement of the three-position four-way (liquid) rotary valve handle, thereby realizing the reversal of the three-position four-way (liquid) rotary valve.

[0003] In practical applications, when using "pneumatic control" or "electrical control" for remote control, compressed air is also needed to achieve remote control; however, in cold seasons, compressed air is prone to precipitate moisture and condense under low temperature, thereby blocking the air source pipeline and causing control failure. When using "electrical control" for remote control, the traction electromagnet used has problems such as inaccurate reversing positioning and large reversing impact force, which can easily cause damage to the reversing valve.

[0004] At present, the published patent CN200920246218.X discloses an electric-controlled ground blowout preventer control device, in which the electric actuator of the three-position four-way (liquid) rotary valve adopts a push-pull electromagnet traction method to realize the switching action of the valve; however, although the electromagnet-traction type three-position four-way (liquid) rotary valve electric actuator can realize the remote control of the switching action of the three-position four-way (liquid) rotary valve, due to the large impact force of the electromagnet, the three-position four-way (liquid) rotary valve is easily damaged during switching, and the electromagnet stroke is not adjustable. The three-position four-way (liquid) rotary valve is subjected to a large impact force for a long time, and the structural changes may occur, thereby causing the switching to be inadequate. Utility Model Content

[0005] The utility model aims to provide a rotary valve electric actuator for a ground blowout preventer control device which solves the above technical problems.

[0006] To this end, the technical solution of the utility model is as follows:

[0007] A rotary valve electric actuator for a surface blowout preventer control device comprises a driver and a connector; the connector comprises a rotating shaft and a base; the driver drives the rotating shaft to rotate forward or reverse; wherein,

[0008] The base includes a fixed disc, a connecting rod is vertically fixed at the center of one side of the disc, and a plurality of semicircular grooves surrounding the connecting rod are evenly distributed on the disc along the circumferential direction; a steel ball is arranged in each semicircular groove;

[0009] The rotating shaft is sleeved on the outside of the connecting rod of the base through a first axial through hole opened at the center thereof; a plurality of second axial through holes arranged around the first axial through hole are evenly distributed on the rotating shaft along the circumferential direction, and they correspond to the plurality of semicircular grooves one by one, so that half of the steel ball exposed outside the semicircular groove is built into the corresponding second axial through hole; a spring is also arranged in each second axial through hole, and the spring is arranged in a compressed state, so that one end of the spring pushes the steel ball tightly against the groove wall of the semicircular groove;

[0010] The baffle, the thrust ball bearing and the nut are sequentially sleeved on the connecting rod from the end of the connecting rod; the baffle is fixed to the other end of the rotating shaft to block the other side of the multiple second axial through holes; one end of the thrust ball bearing is fixed to the baffle so that the connecting rod is centrally inserted in the first axial through hole, and the rotating shaft can rotate freely relative to the connecting rod; the nut is threadedly connected to the end of the connecting rod and abuts against the other end of the thrust ball bearing.

[0011] Furthermore, a mounting groove adapted to the outer diameter of the shaft end of the rotary valve is opened at the center of the other side of the fixed disc, and the shaft end of the rotary valve is inserted and fixed in the mounting groove.

[0012] Furthermore, the other end of the spring should be against the inner plate surface of the baffle, or against the wire plug built into the same second axial through hole.

[0013] As a precise control element, the driver is used to realize the steering control of the three-position four-way (liquid) rotary valve (referred to as the rotary valve for short), and cooperates with the handle set on the rotating shaft of the rotary valve to realize the dual control mode of short-range manual control and long-range electric control.

[0014] Furthermore, the driver is a motor; the motor is a stepper motor or a high-torque motor, and the motor output shaft is the output shaft of the driver.

[0015] Furthermore, the driver is composed of a motor and a reducer; the motor is a low-torque motor, the input shaft of the reducer is connected to the output shaft of the motor, and the output shaft is the output shaft of the driver.

[0016] Furthermore, a first bevel gear is sleeved and fixed on the outer side of the rotating shaft, a second bevel gear is sleeved and fixed on the shaft end of the output shaft of the driver, and the first bevel gear is vertically meshed with the second bevel gear.

[0017] Compared with the prior art, the rotary valve electric actuator used in the ground blowout preventer control device only relies on power as the power source for remote control, thereby improving the reliability of its remote control. At the same time, by adding a connector between the driver and the rotary valve, the switching impact of the three-position four-way (liquid) rotary valve is reduced, making it more reliable and durable. At the same time, the structural design of the device diversifies and regularizes the selection of motors in the drive mechanism, enhances the universality of the device, and has a good prospect for long-term application and promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a partial cross-sectional structural schematic diagram of a rotary valve electric actuator for a ground blowout preventer control device of the utility model;

[0019] Figure 2 It is a schematic cross-sectional structure diagram of a base of a rotary valve electric actuator for a ground blowout preventer control device of the utility model;

[0020] Figure 3 It is a structural schematic diagram of one side of the base of the rotary valve electric actuator for the ground blowout preventer control device of the utility model;

[0021] Figure 4 The utility model is a schematic structural diagram of one side of the rotating shaft of the base of the rotary valve electric actuator for the ground blowout preventer control device. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the following embodiments are by no means intended to limit the present invention in any way.

[0023] See also Figure 1 The rotary valve electric actuator for the surface blowout preventer control device is composed of a driver and a connector, so as to realize the rotation control of the three-position four-way (liquid) rotary valve in the surface blowout preventer control device through electric control.

[0024] The driver is composed of a low-torque motor 12 and a reducer 11; the input shaft of the reducer 11 is connected to the output shaft of the motor through a coupling, so that the output shaft of the reducer 11 serves as the output shaft of the driver.

[0025] The connector includes a rotating shaft 1, a base 2, a steel ball group, a first bevel gear 4, a spring group, a thrust ball bearing 6, a fixing nut 7, a baffle 8, a screw plug 9 and a second bevel gear 10.

[0026] See also Figure 2 and Figure 3The base 2 is composed of a fixed disc and a connecting rod, one end of the connecting rod is vertically fixed at the center of the disk surface on one side of the fixed disc, so that the base 2 forms a T-shaped structure; four semicircular grooves 201 are evenly distributed along the circumferential direction of the connecting rod on the disk surface on one side of the fixed disc; a mounting groove 202 adapted to the outer diameter of the shaft end of the rotating shaft of the rotary valve 14 is opened at the center of the disk surface on the other side of the fixed disc, so as to insert and fix the rotating shaft of the rotary valve 14 in the mounting groove 202, so as to realize the fixed connection between the base 2 and the rotating shaft of the rotary valve 14; a connecting external thread is provided on the outer wall of the other end of the connecting rod.

[0027] See also Figure 4 The rotating shaft 1 is a cylindrical shaft body, with a first axial through hole 101 adapted to the connecting rod at the center, and four second axial through holes 102 evenly distributed around the first axial through hole 101. The rotating shaft 1 is passed through the first axial through hole 101 and is arranged on the connecting rod of the base 2, and one end of the rotating shaft 1 is against the surface of the fixed disk of the base 2; the four second axial through holes 102 correspond to the four semicircular grooves 201 one by one and are interlinked.

[0028] The steel ball group consists of four steel balls 3 , which are respectively arranged in four semicircular grooves 201 opened on the fixed disk. The other half of the steel ball 3 located outside the semicircular groove 201 is built into the second axial through hole 102 corresponding to the semicircular groove 201 .

[0029] The spring group is composed of four springs 5, which are respectively arranged in four second axial through holes 102 in a compressed state; in this embodiment, due to the large length of the rotating shaft 1, a wire plug 9 is also arranged in the second axial through hole 102 located on the side of the baffle 8, so that one end of each spring 5 abuts against the wire plug 9 and the other end abuts against the steel ball 3, and at the same time, the thrust of the compressed spring 5 on the steel ball 3 is utilized to make the steel ball 3 tightly abut against the groove wall of the semicircular groove 201; wherein, the compression amount of the spring 5 matches the operating torque requirement of the rotary valve.

[0030] The baffle plate 8, the thrust ball bearing 6 and the nut 7 are sequentially sleeved on the connecting rod from the other end of the rotating shaft 1; wherein the baffle plate 8 is fixed to the other end face of the rotating shaft 1 by screws to block the four second axial through holes 102 of the rotating shaft 1; one end of the thrust ball bearing 6 is fixed to the baffle plate 8, so that the connecting rod is centrally arranged in the first axial through hole 101 of the rotating shaft 1, so that the rotating shaft 1 can rotate freely relative to the connecting rod; the nut 7 is threadedly fixed on the connecting rod and abuts against the other end of the thrust ball bearing 6 for limiting.

[0031] The first bevel gear 4 is sleeved and fixed on the outside of the rotating shaft 1 , the second bevel gear 10 is sleeved and fixed on the output shaft end of the driver, and the first bevel gear 4 is vertically meshed with the second bevel gear 10 .

[0032] The working principle of the rotary valve electric actuator for the surface blowout preventer control device is specifically described as follows.

[0033] A connector is installed at the end of the rotating shaft of the rotary valve 14, specifically: the end of the rotating shaft is inserted and fixed in the circular mounting groove 202 on the fixed disc of the base 2; a manual push rod is also fixedly installed on the rotating shaft of the rotary valve 14, so that the rotary valve has two execution driving modes: manual and electric.

[0034] In the rotary valve electric actuator, the driver drives the second bevel gear 10 to rotate, so that the first bevel gear 4 meshing therewith rotates in a vertical direction; the first bevel gear 4 is fixed on the rotating shaft 1, so the rotating shaft 1 rotates synchronously with the first bevel gear 4; the rotating shaft 1 is rotatably connected to the connecting rod of the base 2, so the rotating shaft 1 can rotate with the first bevel gear 4 from beginning to end. Similarly, the four steel balls 3 are partially arranged on the inner side of the rotating shaft 1, so they can also rotate driven by the rotation of the rotating shaft 1.

[0035] I. Connector connection state: In the initial state, the four steel balls 3 are respectively pressed onto the groove walls of the four semicircular grooves 201 under the thrust of the four compression springs 5; since the shaft of the rotary valve 14 can also rotate along the rotation direction of the shaft 1 at this time, the four steel balls 3 pressed onto the base 2 under the thrust of the spring 5 have sufficient torque to drive the base 2 to rotate in the same direction as the shaft 1; in this process, the four steel balls 3 do not rotate relative to the base 2, and the two are in a relatively static state; in the above state, the shaft 1 is connected to the base 2 through the four steel balls 3, that is, the connector is in a connected state.

[0036] II. Connector disconnected state: When the rotary valve 14 rotates to a new state position, the rotary shaft of the rotary valve is designed to be unable to continue rotating; at this time, the torque of the rotary shaft increases, so that the rotational torque generated by the four compression springs 5 ​​pushing the four steel balls 3 cannot overcome the torque of the rotary shaft in this state; at this time, the rotary shaft 1 still maintains a rotating state and rotates freely relative to the connecting rod of the base 2; similarly, the steel balls 3 also rotate with the rotary shaft 1; however, since the base 2 is stationary in this state, the steel balls 3 can only roll relative to the groove wall of the circular groove 201 during the rotation of the rotary shaft 1, and during the movement, the steel balls 3 are subjected to the reverse force of the groove wall of the circular groove 201 and no longer tightly abut against the groove wall, thereby squeezing the spring 5 to slightly move toward the inside of the second axial through hole 102; in the above process, the four steel balls 3 can no longer be pressed on the base 2 to generate a rotational torque, that is, the connector is disconnected.

[0037] When the driving motor 12 stops rotating, the rotating shaft 1 and the four steel balls 3 return to a stationary state; at this time, due to the change in the relative motion state, the four steel balls 3 return to the initial state of being partially embedded in the four circular grooves 201 under the elastic force of the four springs 5.

[0038] Similar to the above working process, when the rotary valve 14 needs to be rotated in another direction to a new rotation position, the rotary valve movement in the same manner as the above process can be achieved by driving the motor 12 and rotating it in the opposite direction to the above process.

[0039] When the rotary valve 14 is manually operated, the torque of the manual operating handle 13 is generally greater than the force of the spring 5 pushing the steel ball 3, so the steel ball 3 can also be separated from the base 2, ensuring smooth rotation drive of the manually operated rotary valve.

[0040] In this embodiment, according to the requirements of Article 5.2.3.5 of the standard "SY / T 5443-2001_Special Hydraulic and Pneumatic Components for Surface BOP Control Devices", the operating torque of the three-position four-way (liquid) rotary valve should not be greater than 40 N.m. Therefore, this embodiment sets the compression amount of the four springs 5 ​​inside the connector to meet the following requirements: the rotation torque of the four steel balls 3 acting on the base 2 is less than 40 N.m (for example, the rotation torque is set to 35 N.m in this embodiment) as the design basis to ensure that the connector is overloaded or disconnected when the corresponding torque is reached; at the same time, based on the general operating torque of the manually operated reversing handle 13 is close to but less than 40 N.m, the above-mentioned design for torque also ensures that the manual operation is not affected, that is, when the reversing handle 13 is manually operated, since the manual operating torque is also greater than the rotation torque designed for the connector, the connector is in a disconnected state during manual operation, and the connector does not affect the manual operation process.

[0041] According to actual operation, the rotary valve electric actuator of the surface blowout preventer control device of this embodiment cooperates with the connector through the driver and is then connected to the rotary valve 14. On the basis of not changing the control method of the traditional driver, the actuator completes the opening and closing operation of the rotary valve 14 within 1 second and keeps the operating torque of the rotary valve 14 within the standard.

[0042] In summary, the rotary valve electric actuator for the ground blowout preventer control device meets the above-mentioned use requirements of the three-position four-way reversing valve, and can realize the remote switch control of the rotary valve without affecting the use of the manual reversing control of the reversing handle configured thereon.

Claims

1. A rotary valve electric actuator for a surface blowout preventer control device, characterized in that: The invention comprises a driver and a connector; the connector comprises a rotating shaft (1) and a base (2); the driver drives the rotating shaft (1) to rotate forward or reverse; wherein the base (2) comprises a fixed disk, a connecting rod is vertically fixed at the center of one side of the disk surface, and a plurality of semicircular grooves (201) arranged around the connecting rod are evenly distributed along the circumferential direction on the disk surface; a steel ball (3) is arranged in each semicircular groove (201); the rotating shaft (1) is sleeved on the outer side of the connecting rod of the base (2) through a first axial through hole (101) opened at the center thereof; a plurality of second axial through holes (102) arranged around the first axial through hole (101) are also evenly distributed on the rotating shaft (1) along the circumferential direction, and they respectively correspond to the plurality of semicircular grooves (201) one by one, so that the steel balls (3) exposed in the semicircular grooves (201) are 1) the outer half of the steel ball is built into the corresponding second axial through hole (102); a spring (5) is also arranged in each second axial through hole (102), and the spring (5) is arranged in a compressed state so that one end of the spring (5) pushes the steel ball (3) to press against the groove wall of the semicircular groove (201); the baffle (8), the thrust ball bearing (6) and the nut (7) are sequentially sleeved on the connecting rod from the end of the connecting rod; the baffle (8) is fixed to the other end of the rotating shaft (1) to block the other side of the plurality of second axial through holes (102); one end of the thrust ball bearing (6) is fixed to the baffle (8) so that the connecting rod is centrally inserted into the first axial through hole (101), and the rotating shaft (1) can rotate freely relative to the connecting rod; the nut (7) is threadedly connected to the end of the connecting rod and abuts against the other end of the thrust ball bearing (6).

2. The rotary valve electric actuator for the surface blowout preventer control device according to claim 1, characterized in that: A mounting groove (202) adapted to the outer diameter of the shaft end of the rotary valve (14) is provided at the center of the disk surface on the other side of the fixed disk. The shaft end of the rotary valve (14) is inserted and fixed in the mounting groove (202).

3. The rotary valve electric actuator for the surface blowout preventer control device according to claim 1, characterized in that: The other end of the spring should be against the inner plate surface of the baffle (8), or against the wire plug (9) built into the same second axial through hole (102).

4. The rotary valve electric actuator for the surface blowout preventer control device according to claim 1, characterized in that: The driver is a motor; the motor adopts a stepper motor or a high-torque motor, and the output shaft of the motor is the output shaft of the driver.

5. The rotary valve electric actuator for the surface blowout preventer control device according to claim 1, characterized in that: The driver is composed of a motor and a reducer; the motor adopts a low-torque motor, the input shaft of the reducer is connected to the output shaft of the motor, and the output shaft is the output shaft of the driver.

6. The rotary valve electric actuator for the surface blowout preventer control device according to claim 4 or 5, characterized in that: A first bevel gear (4) is sleeved and fixed on the outside of the rotating shaft (1), a second bevel gear (10) is sleeved and fixed on the output shaft end of the driver, and the first bevel gear (4) is vertically meshed with the second bevel gear (10).

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