[0014] Such as figure 1 As shown, a fracturing manifold quick connect device includes a first movable elbow 1, a straight pipe 2, a second movable elbow 3, an oil cylinder 6, a support 7, a plug valve 4, a check valve 5, and a hydraulic system , The control unit, the first movable elbow 1, the straight pipe 2, the second movable elbow 3, the plug valve 4 and the check valve 5 are connected in sequence, and the fracturing fluid is sequentially connected through the first movable elbow 1 by the fracturing equipment , The straight pipe 2, the second movable elbow 3, the plug valve 4 and the check valve 5 are delivered to the manifold skid. The support 7 is fixedly connected to the second movable elbow 3. Specifically, the second movable elbow 3 includes a first elbow and a second elbow, and the first elbow and the second elbow are rotatably connected, The first elbow is also connected with the plug valve 4, the second elbow is also connected with the straight pipe 2, and the support 7 is fixedly connected with the first elbow. One end of the oil cylinder 6 is connected to the straight pipe 2, and the other end of the oil cylinder 6 is connected to the support 7. The oil cylinder 6 can drive the straight pipe 2 to rotate around the second movable elbow 3. Specifically, the oil cylinder 6 is provided with There is a hydraulic rod, one end of the hydraulic rod is hinged with the linear pipe 2, and the other end of the hydraulic rod extends from one end of the cylinder 6 into the cylinder 6 and can move in the cylinder 6. The other end of the cylinder 6 is connected to the support The seat 7 is hinged, and the hydraulic rod can drive the linear tube 2 and the second elbow to rotate around the first elbow through the movement of the hydraulic rod in the oil cylinder 6. The control unit controls the oil cylinder 6 through a hydraulic system to control the rotation of the linear pipe 2. Specifically, the hydraulic system is the execution unit of the control unit, and the hydraulic system is used to control the movement of the hydraulic rod in the cylinder 6 to further control the rotation of the linear pipe 2 and the second bend around the first bend. The automatic adjustment of the quick-connect device is realized through the hydraulic system without manual lifting or pressing. The control unit can realize the remote control of the quick-connect device, saving time and effort, and reducing the cost of manual operation on site.
[0015] The hydraulic system includes an oil supply device 8, a power device 9, an electromagnetic control valve 10, a one-way throttle valve 11, an accumulator 13, and a balance valve 12. The oil supply device 8, a power device 9 and an electromagnetic control valve 10 In sequential connection, the solenoid control valve 10 is also connected to a one-way throttle valve 11, a balance valve 12, and an oil supply device 8. The one-way throttle valve 11 is also connected to a balance valve 12, and the balance valve 12 is also They are connected to the accumulator 13 and the rod cavity of the oil cylinder 6 respectively. Specifically, the one-way throttle valve 11 only throttles the conveying direction from the balance valve 12 to the electromagnetic control valve 10. The balance valve 12 is provided with a return path, and the communication of the return path requires a certain pressure to maintain. The solenoid control valve 10 is provided with 4 ports, namely p port, t port, a port, and b port. The p port is an input port. When the p port is connected to the a port, the b port and the t port are connected. It is also in the connected state. When the p interface is connected to the b interface, the a interface and the t interface are also in the connected state at this time. The p interface is connected to the power unit 9, the t interface is connected to the oil supply device 8, and the a interface is connected to one-way The throttle valve 11 is connected, and the b port is connected to the balance valve 12. The hydraulic oil is delivered from the oil supply device 8 to the rod cavity of the cylinder 6 through the electromagnetic control valve 10, the one-way throttle valve 11 and the balance valve 12, so that the hydraulic rod can move in the direction close to the second movable elbow 3. The oil cylinder 6 drives the linear pipe 2 to rotate upward around the second movable elbow 3. The hydraulic oil is delivered from the rod cavity to the oil supply device 8 via the balance valve 12, the one-way throttle valve 11 and the electromagnetic control valve 10. The pressure in the rod cavity drops, and the linear rod 2 drops under its own gravity to achieve a straight line The tube 2 rotates downward around the second movable elbow 3.
[0016] The hydraulic system further includes an overflow valve 14, the inlet end of the overflow valve 14 is connected with the outlet end of the power device 9, and the outlet end of the overflow valve 14 is connected with the oil supply device 8. When the delivery pressure at the outlet end of the power unit 9 is too high, the hydraulic oil can be delivered to the oil supply device 8 through the overflow valve 14, and the overflow valve 14 can maintain the pressure of the hydraulic oil in the delivery pipeline.
[0017] The oil supply device 8 is also connected with the rodless cavity of the oil cylinder 6. When the hydraulic rod moves toward the second movable elbow 3, the hydraulic oil in the rodless cavity can enter the oil supply device 8 from the rodless cavity. When the hydraulic rod moves away from the second movable elbow 3, The hydraulic oil can enter the rodless cavity from the oil supply device 8. The rodless cavity is connected with the oil supply device 8, so that the pressure at both ends of the piston on the hydraulic rod can be balanced and the service life of the piston can be increased.
[0018] The control unit includes a signal transmitter 15 and a signal receiver 16, the signal transmitter 15 is used to send a control signal, the signal receiver 16 is used to receive the control signal and control the electromagnetic control valve 10 and the power device according to the control signal 9. Through the control unit, the on-off state of the electromagnetic control valve 10 and the power device 9 can be automatically controlled to realize the remote control of the quick-connect device, save time and effort, and reduce the cost of manual operation on site.
[0019] The signal transmitter 15 is a movable controller. The signal transmitter 15 can move with the staff, and the staff can carry out the control operation at any time during the on-site operation, and quickly connect the manifold.
[0020] Since the solenoid control valve 10 is also provided with a control switch, the connection state of the four interfaces on the solenoid control valve 10 can be realized by manually adjusting the control switch. Therefore, when the remote control unit fails or according to on-site operation requirements , The local control of the operation site can be realized by manually operating the control switch and power unit 9. The control method can be freely selected according to the actual situation, and the control is flexible.
[0021] working principle:
[0022] Straight pipe ascending process: the staff sends out a control signal through the signal transmitter 15, the signal receiver 16 connects the p interface and a interface of the solenoid control valve 10 after receiving the control signal, and at the same time starts the power unit 9, and the power unit 9 uses hydraulic oil From the oil supply device 8 to the electromagnetic control valve 10, and from the electromagnetic control valve 10 to the balance valve 12 via the one-way throttle valve 11, the balance valve 12 simultaneously delivers hydraulic oil to the accumulator 13 and the rod of the cylinder 6 Cavity. As the hydraulic oil in the rod cavity increases, the pressure of the hydraulic oil in the rod cavity increases, and the hydraulic oil pushes the piston to move closer to the second movable elbow 3, thereby driving the hydraulic rod to approach the second movable elbow 3 Move in the direction of, so as to realize the linear pipe 2 rotates upward around the second movable elbow 3, and realize the ascending process of the linear pipe 2. During the ascending process of the linear tube 2, the staff can control by the signal transmitter 15 at any time to reach the predetermined ascending position. When the staff turns off the power unit 9, the balance valve 12 stops delivering hydraulic oil to the accumulator 13 and the rod cavity, and the return path in the balance valve 12 is not opened, and the balance valve 12 cannot deliver hydraulic oil in the reverse direction. 13 is in communication with the rod cavity, and the pressure of the hydraulic oil in the accumulator 13 is the same as the pressure of the hydraulic oil in the rod cavity. The accumulator 13 is sufficient to maintain the stability of the hydraulic oil pressure in the rod cavity and realize the linear pipe 2 Keep hovering in different positions.
[0023] Straight pipe descent process: the staff sends a control signal through the signal transmitter 15, and the signal receiver 16 connects the p interface and b interface of the solenoid control valve 10 after receiving the control signal, and at the same time starts the power unit 9, and the power unit 9 uses hydraulic oil From the oil supply device 8 to the solenoid control valve 10, and from the solenoid control valve 10 to the balance valve 12, the return path in the balance valve 12 is connected to realize the reverse flow of the balance valve 12, and there is hydraulic oil in the rod cavity It is delivered to the one-way throttle valve 11 through the balance valve 12 in the reverse direction, and then delivered to the a port of the solenoid control valve 10 via the one-way throttle valve 11, and sent to the oil supply device 8 from the t port. There is hydraulic pressure in the rod cavity The oil is reduced, the pressure drops, and the linear tube 2 falls under its own gravity to realize the downward process of the linear tube 2. During the descent process, the throttle effect of the one-way throttle valve 11 can limit the return speed of the hydraulic oil, thereby limiting the falling speed of the linear pipe 2. When the set height is reached, the power unit 9 is turned off and the solenoid control valve is turned on The b port and t port of 10, the hydraulic oil in the oil circuit between the balance valve 12 and the solenoid control valve 10 flows back to the oil supply device 8 from the b port through the t port, and the return path in the balance valve 12 is disconnected and balanced The valve 12 cannot flow in the reverse direction, and the hydraulic oil in the rod cavity cannot be conveyed in the reverse direction. At this time, the hydraulic oil in the accumulator 13 is sufficient to maintain the linear pipe 2 in a hovering state.
[0024] Those skilled in the industry should understand that the present invention is not limited by the foregoing embodiments. The foregoing embodiments and descriptions only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have Various changes and improvements, these changes and improvements fall within the scope of the claimed invention. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.
