CN-224214149-U - Ram blowout preventer switching device

CN224214149UCN 224214149 UCN224214149 UCN 224214149UCN-224214149-U

Abstract

The utility model belongs to the field of blowout preventers, and particularly relates to a ram blowout preventer switching device. In order to ensure that the movement amount of the valve plate is equal to a set value, the utility model provides a ram blowout preventer switching device. The ram blowout preventer switching device comprises a rotary power source, a speed reducing mechanism and a support frame which is fixedly connected to the ram blowout preventer and used for supporting the rotary power source and the speed reducing mechanism, wherein the support frame comprises a mounting plate and a clamp, the rotary power source is mounted on the mounting plate, the clamp comprises a first clamping piece, a second clamping piece and a spacing adjusting mechanism, the mounting plate is fixedly connected to the first clamping piece or integrally formed with the first clamping piece, and the spacing adjusting mechanism is used for adjusting the spacing between the two clamping pieces so that the first clamping piece and the second clamping piece directly or indirectly clamp the ram blowout preventer. The rotary power source, the speed reducing mechanism and the ram blowout preventer are vibrated synchronously to ensure that the movement amount of the valve plate is set to a set value.

Inventors

ZOU ZHENGHUI
ZHAO SHENGJUN
YANG YUNFANG
ZHANG JIMING
ZHANG HUA
LOU ZHENGJIE

Assignees

中国石油化工股份有限公司
中国石油化工股份有限公司中原油田分公司

Dates

Publication Date: 20260508
Application Date: 20250623

Claims (10)

1. The utility model provides a ram blowout preventer switching device, including rotary power source and reduction gears, rotary power source is connected with reduction gears's input transmission, reduction gears's output is used for being connected with ram blowout preventer's lead screw transmission, a serial communication port, still include fixed connection on ram blowout preventer and be used for supporting rotary power source and reduction gears's support frame, the support frame includes mounting panel and anchor clamps, rotary power source installs on the mounting panel, the anchor clamps include first holder, second holder and interval adjustment mechanism, mounting panel fixed connection is on first holder or with first holder integrated into one piece, interval adjustment mechanism is used for adjusting the interval between two holders, in order to be used for making first holder and second holder direct or indirect clamp ram blowout preventer.
2. The ram blowout preventer switching device of claim 1, wherein the number of the two rotary power sources and the number of the reduction mechanisms are two, the two rotary power sources are respectively in transmission connection with the input ends of the two reduction mechanisms, the output ends of the two reduction mechanisms are respectively in transmission connection with the two screw rods of the ram blowout preventer, the number of the mounting plates is also two, the two rotary power sources are respectively mounted on different mounting plates, and the first clamping piece is used for connecting the two mounting plates.
3. The ram blowout preventer switching apparatus of claim 1 or 2, wherein a side of the first clamping member adjacent to the second clamping member is provided with a clamping surface for contacting the ram blowout preventer stack for directly clamping the ram blowout preventer by the first clamping member and the second clamping member.
4. The ram blowout preventer switching device of claim 1 or 2, wherein the second clamping member is provided with arcuate slots for mating with the barrels of the ram blowout preventer.
5. The ram blowout preventer switching device of claim 1 or 2, wherein the spacing adjustment mechanism is a lead screw adjustment mechanism comprising a bolt and a nut, one of the bolt head and the nut of the bolt being located on a side of the first clamping member facing away from the second clamping member, the other being located on a side of the second clamping member facing away from the first clamping member.
6. The ram blowout preventer switch apparatus of claim 5, wherein two nuts constituting a double nut locking structure are connected to the same bolt, a threaded hole is provided in the first clamping member, a jackscrew is threaded in the threaded hole, and one end of the jackscrew is for pushing against the ram blowout preventer for indirectly clamping the ram blowout preventer by the first clamping member and the second clamping member.
7. The ram blowout preventer switching device of claim 1 or 2, wherein the speed reducing mechanism is a chain sprocket drive mechanism comprising a drive sprocket, a drive member comprising a driven sprocket and a chain for drivingly connecting the drive sprocket to the driven sprocket, the drive sprocket being mounted on the output of the rotary power source, the drive member comprising a polygonal prism bore shaped for mating with a polygonal prism connected to one end of a lead screw in the ram blowout preventer for drivingly connecting the drive member to the lead screw.
8. The ram blowout preventer switching device of claim 7, wherein the transmission further comprises an emergency polygon prism for placement at an end of the transmission remote from the lead screw.
9. The ram blowout preventer switching device of claim 1 or 2, wherein the reduction mechanism is a belt drive mechanism comprising a drive pulley, a drive member comprising a driven pulley and a belt for drivingly connecting the drive pulley to the driven pulley, the drive pulley being mounted on an output end of the rotary power source, the drive member comprising a polygonal prism bore shaped to mate with a polygonal prism connected to one end of a lead screw in the ram blowout preventer for drivingly connecting the drive member to the lead screw.
10. The ram blowout preventer switching device of claim 1 or 2, wherein the ram blowout preventer switching device further comprises a control module, the output of the rotary power source is further coupled to a rotary encoder, the rotary encoder is communicatively coupled to the control module, and the control module is configured to stop rotation of the rotary power source when the rotary encoder is rotated a set number of revolutions.

Description

Ram blowout preventer switching device Technical Field The utility model belongs to the field of blowout preventers, and particularly relates to a ram blowout preventer switching device. Background Ram blowout preventers are well control equipment commonly used in oilfield oil and water well minor repair operations. The ram blowout preventer comprises a shell and a ram assembly arranged on the shell, wherein the ram assembly comprises a ram, a ram shaft connected with the ram and a screw rod in threaded connection with the ram shaft, and the two rams can be driven to be relatively close to or far away from each other by rotating the screw rod, so that the ram is closed or opened. In one ram blowout preventer, two lead screws are connected at one end of each lead screw, two workers can respectively rotate the hexagonal prisms connected with the two lead screws by utilizing a special spanner to manually switch the ram, in the other ram blowout preventer (such as the ram blowout preventer with the model number of SFZ-21Z), one lead screw is connected with a handle at one end of each lead screw, and a single worker can switch the ram by screwing the handle. Of course, when only one screw rod exists, a hexagonal prism connected with the screw rod can be arranged, and the screw rod can be screwed by matching with the hexagonal prism through a special tool. In order to save labor, the Chinese patent with the authority bulletin number of CN217632366U and the authority bulletin date of 2022.10.21 discloses a remote automatic switching device of a wellhead blowout preventer. The device comprises a hydraulic motor, a speed reducer, a reversing valve and a control switch, wherein the output end of the hydraulic motor is in transmission connection with the input end of the speed reducer, the output end of the speed reducer is in transmission connection with a screw rod, the reversing valve is connected with the hydraulic motor, and the control switch is used for controlling the working state of the reversing valve so as to control the hydraulic motor to rotate positively, reversely or be static. The speed reducer is a known gear speed reducer or a worm gear speed reducer, and an output gear or an output turbine of the speed reducer is arranged on the screw rod. When the ram blowout preventer with different numbers of screw rods is used, each screw rod is provided with a hydraulic motor and a speed reducer. The above patent does not disclose how the speed reducer and the hydraulic motor are mounted. In actual use, the weight of the speed reducer and the hydraulic motor cannot be supported by the output gear and the output turbine in order to ensure the normal use of the speed reducer, and therefore, it is easy to think of those skilled in the art that the housing of the speed reducer is brought into contact with the ground, and the speed reducer and the hydraulic motor are supported by the ground. In actual production, the wellhead large four-way joint is impacted by high-pressure oil gas, so that the wellhead blowout preventer mounted on the wellhead large four-way joint can slightly shake, the output gear or the output turbine can slightly shake, and the gear meshed with the output gear (or the worm meshed with the output turbine) cannot vibrate due to the arrangement of the speed reducer in a landing mode, and finally the output gear and the corresponding gear (the gear meshed with the output gear) can collide or separate from each other, or the output turbine and the corresponding worm (the worm meshed with the output turbine) can collide or separate from each other. When the above situation occurs, on the one hand, the service life of the speed reducer is affected, on the other hand, when the output gear is disengaged from the corresponding gear, the corresponding gear idles (when the output turbine is disengaged from the corresponding worm, the corresponding worm also idles), thereby causing a smaller rotation amount of the output gear (output turbine), causing a smaller rotation amount of the screw rod in driving connection with the output gear (output turbine), and finally causing a valve plate to be incompletely opened or incompletely closed, resulting in a safety accident. Disclosure of utility model The utility model aims to provide a ram blowout preventer switching device, which solves the technical problem that when a wellhead is vibrated in a large four-way, the rotation amount of a screw is smaller than a set value, so that a ram is not fully opened or not fully closed. In order to achieve the above purpose, the technical scheme of the ram blowout preventer switching device provided by the utility model is as follows: The utility model provides a ram blowout preventer switching device, including rotary power source and reduction gears, rotary power source is connected with reduction gears's input transmission, reduction gears's output is used for being connected with ram blowout preventer's lead screw tran