Automatic lifting and placing control system for derrick base of petroleum drilling machine

Abstract

The invention discloses an automatic lifting and placing control system for a derrick base of a petroleum drilling machine, which comprises the automatic lifting and placing control system for the derrick base of the petroleum drilling machine. Comprising a control operation box, a first hydraulic winch, a second hydraulic winch, a first safety gear, a second safety gear, a first displacement sensor, a second displacement sensor, a first buffer hydraulic cylinder, a second buffer hydraulic cylinder and a control unit. An oil inlet, an oil return port and an oil drainage port are formed in the control operation box, and the oil inlet is connected with the first throttling valve and an oil inlet of the multi-way valve; the electric proportional multi-way valve is used for controlling the two sets of hydraulic winches to lift and release, the high-precision synchronous motor is used for guaranteeing synchronism in the lifting and releasing process, automatic fine adjustment is conducted through the fine adjustment unit when asynchronization occurs, the automation degree is high, and the synchronization performance is good; the system not only can realize synchronous lifting and placing of the derrick base, but also can realize independent action, the two hydraulic winches do not influence each other during independent action, different lifting and placing working conditions are met, and the application is wide.

Description

Technical Field

[0001] The invention relates to the technical field of oil drilling rigs, in particular to an automatic raising and lowering control system for a derrick base of an oil drilling rig. Background Art

[0002] Traditionally, the lifting and lowering of the derrick base of an oil rig is mainly achieved by a drilling winch. With the continuous development of oil rig technology, especially the growing demand for automated drilling rigs, the use of hydraulic winches and hydraulic cylinders to lift and lower the derrick base of a drilling rig is becoming more and more widespread, especially in situations where the structure is limited, the safety requirements of drilling equipment are high, and rapid relocation is required. However, when a hydraulic winch is currently used to lift and lower the derrick base of a drilling rig, the winch is driven by a single motor, and there are no additional braking measures except for the balance valve and the brake. Although it is equipped with a synchronization handle, a diversion and collection valve is used for synchronization, and the lifting deviation is observed by the naked eye and then fine-tuned by the fine-tuning handle. The operation is complicated, the synchronization effect is poor, the pipeline bursts, stalls, and the safety factor is low, which can easily lead to safety accidents such as tearing and falling of the derrick or base, and cannot meet the requirements for automated lifting and lowering of the derrick base of an oil rig. Summary of the invention

[0003] The purpose of the present invention is to provide an automatic raising and lowering control system for a petroleum drilling rig derrick base to solve the problems raised in the background technology.

[0004] To achieve the above-mentioned object, the present invention provides the following technical solutions: an automatic raising and lowering control system for a derrick base of an oil drilling rig, comprising a control operation box, a first hydraulic winch, a second hydraulic winch, a first safety clamp, a second safety clamp, a first displacement sensor, a second displacement sensor, a first buffer hydraulic cylinder, a second buffer hydraulic cylinder and a control unit; the control operation box is provided with an oil inlet, an oil return port and an oil drain port, and the oil inlet is respectively connected to the oil inlet of the first throttle valve and the multi-way valve; The multi-way valve comprises a first multi-way valve, a second multi-way valve, a third multi-way valve, a fourth multi-way valve and a fifth multi-way valve; the first multi-way valve controls the first buffer hydraulic cylinder, and the second multi-way valve controls the second buffer hydraulic cylinder; the first hydraulically controlled reversing valve and the first buffer valve are sequentially arranged between the rodless chamber and the oil return port of the first buffer hydraulic cylinder, and the control port pressure oil of the first hydraulically controlled reversing valve comes from the X port of the first multi-way valve; the second hydraulically controlled reversing valve and the second buffer valve are sequentially arranged between the rodless chamber and the oil return port of the second buffer hydraulic cylinder, and the control port pressure oil of the second hydraulically controlled reversing valve comes from the X port of the second multi-way valve; the fourth one-way valve is arranged between the rod chamber and the oil return port of the first buffer hydraulic cylinder, and the third one-way valve is arranged between the rod chamber and the oil return port of the second buffer hydraulic cylinder; The A and B ports of the third multi-way valve are connected to the lowering port and the lifting port of the first hydraulic winch through the first hydraulically controlled ball valve and the second hydraulically controlled ball valve, respectively; the A and B ports of the fourth multi-way valve are connected to the lowering port and the lifting port of the second hydraulic winch through the third hydraulically controlled ball valve and the fourth hydraulically controlled ball valve, respectively; the A port of the fifth multi-way valve is connected to the lowering port of the first hydraulic winch through the first hydraulically controlled one-way valve, and is connected to the lowering port of the second hydraulic winch through the second hydraulically controlled one-way valve; the B port of the fifth multi-way valve is connected to the synchronous motor through the first one-way throttle valve and the third hydraulically controlled one-way valve, and the outlets of the synchronous motor are connected to the lifting ports of the first hydraulic winch and the second hydraulic winch, respectively; The synchronous motor comprises two hydraulic motors, two one-way valves and two overflow valves, wherein the one-way valve and the overflow valve are arranged between the outlets of the two hydraulic motors, and the outlets of the two overflow valves are connected to the inlets of the two one-way valves and communicate with the oil return port.

[0005] Preferably, the control oil of the first hydraulically controlled one-way valve and the second hydraulically controlled one-way valve comes from the B port of the fifth multi-way valve, and the control oil of the third hydraulically controlled one-way valve comes from the A port of the fifth multi-way valve; the spring chamber control oil of the first hydraulically controlled ball valve and the second hydraulically controlled ball valve comes from the X port of the third multi-way valve, and the spring chamber control oil of the third hydraulically controlled ball valve and the fourth hydraulically controlled ball valve comes from the X port of the fourth multi-way valve; the control chambers of the first hydraulically controlled ball valve, the second hydraulically controlled ball valve, the third hydraulically controlled ball valve and the fourth hydraulically controlled ball valve are connected to the X port of the fifth multi-way valve.

[0006] Preferably, the first safety clamp and the second safety clamp are communicated with the oil inlet of the operation box through the first hydraulically controlled valve and the second hydraulically controlled valve respectively, through the first pressure reducing valve and the first throttle valve, and the first one-way valve and the second one-way valve are respectively arranged on the bypass of the working oil ports of the first safety clamp and the second safety clamp, and the outlets of the first one-way valve and the second one-way valve are communicated, and the outlets of the first one-way valve and the second one-way valve are divided into two routes: one route is connected to the Y port of the multi-way valve through the second throttle valve, and the other route is communicated with the oil drain route through the electromagnetic ball valve; the control oil of the first hydraulically controlled valve is taken from the X port of the fourth multi-way valve and the X port of the fifth multi-way valve through the first shuttle valve, and the control oil of the second hydraulically controlled valve is taken from the X port of the third multi-way valve and the X port of the fifth multi-way valve through the second shuttle valve.

[0007] Preferably, the first hydraulic winch includes a motor and a rib valve, the first hydraulic winch's lifting and lowering port and lower port are both provided with stop valves, a buffer overflow valve is provided between the first hydraulic winch's lifting and lowering port and the lower releasing port, the lifting port is provided with a balance valve, and the opening and closing of the balance valve is controlled by the pressure of the lower releasing port; the two oil inlets of the shuttle valve are respectively connected to the motor's lifting and lowering port, and the shuttle valve outlet is connected to the brake through the second pressure reducing valve, the hydraulic valve, and the second one-way throttle valve to control the action of the brake; the second hydraulic winch has exactly the same structure as the first hydraulic winch and is arranged symmetrically on the left and right.

[0008] Preferably, the first displacement sensor and the second displacement sensor are used to detect the lifting and lowering status of the base, and transmit the detection data to the control unit in the control box in real time. Through the PLC control in the control unit, the lifting and lowering status of the derrick base is detected and automatically adjusted in real time.

[0009] The working principle of the present invention is: The automatic lifting and lowering control system of the oil drilling rig derrick base described in the present invention is composed of a synchronous lifting system, a buffer system and a brake system. The synchronous lifting system and the buffer system are controlled by an electric proportional multi-way valve, wherein the first multi-way valve and the second multi-way valve respectively control the first buffer hydraulic cylinder and the second buffer hydraulic cylinder, a hydraulically controlled reversing valve and a buffer valve are sequentially arranged between the rodless chamber and the return oil of the buffer hydraulic cylinder, and a one-way valve is arranged between the rod chamber and the return oil port of the buffer hydraulic cylinder; the third multi-way valve, the fourth multi-way valve and the fifth multi-way valve control the synchronous lifting and lowering, wherein the fifth multi-way valve is a synchronous valve, the A port is respectively connected to the lowering port of the left and right hydraulic winches, and the B port is respectively connected to the left and right hydraulic winches through a synchronous motor. The lifting port, the third multi-way valve and the fourth multi-way valve are fine-tuning joints, which are respectively connected to the lifting port and the lowering port of the left and right hydraulic winches through the hydraulically controlled ball valve, and the corresponding actuators are controlled to make fine adjustments when displacement deviation occurs; the brake system is composed of left and right safety clamps, and the first safety clamp and the second safety clamp are respectively connected to the oil inlet of the operating box through the first hydraulically controlled valve and the second hydraulically controlled valve through the first pressure reducing valve and the first throttle valve. The first safety clamp and the second safety clamp working oil port bypass are respectively provided with the first check valve and the second check valve. The check valve outlet is connected to the multi-way valve Y port through the second throttle valve, and the other way is connected to the oil drain circuit through the electromagnetic ball valve, which plays a secondary safety protection role for the safety of the derrick base lifting and lowering. The present invention realizes the full-automatic lifting of the derrick base, can realize the left and right individual fine-tuning and multiple protections of the safety of lifting and lowering, and has the functions of high degree of automation, good synchronization, safety and reliability.

[0010] The beneficial effects of the present invention are: The invention discloses an automatic raising and lowering control system for a petroleum drilling rig derrick base, which adopts an electric proportional multi-way valve to control two groups of hydraulic winches for raising and lowering, adopts a high-precision synchronous motor to ensure the synchronization of the raising and lowering process, and performs automatic fine adjustment through a fine adjustment link when asynchronism occurs, with a high degree of automation and good synchronization performance; the system can not only realize the synchronous raising and lowering of the derrick base, but also realize independent action, and the two hydraulic winches do not affect each other during independent action, so as to meet different raising and lowering working conditions and have a wide application; the hydraulic winch motor has a brake, and the brake oil is taken from the motor working oil port, which is safe and reliable; at the same time, a safety clamp is also arranged on the winch drum to ensure the safety of raising and lowering, and the control oil of the safety clamp and the brake control oil of the hydraulic motor do not affect each other; in addition, an electromagnetic ball valve is installed on the control oil circuit of the safety clamp, and when a fault occurs and the derrick base cannot be braked, the electromagnetic ball valve can be controlled to lose power by an emergency stop to realize emergency braking, so as to realize multiple safety protections; each group of hydraulic winches adopts four motors, two of which are used as backup, so as to improve the reliability of the product; in addition, the raising and lowering system is also equipped with an emergency brake function to ensure safety and reliability during the raising and lowering process. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of an automatic raising and lowering control system for a petroleum drilling rig derrick base of the present invention; Figure 2 This is the schematic diagram of the motor assembly; In the figure: 2, the first hydraulic winch, 3, the second hydraulic winch, 10, the first multi-way valve X port, 11, the oil inlet, 12, the oil return port, 13, the oil drain port, 20, the second multi-way valve X port, 21, the first safety clamp, 22, the second safety clamp, 30, the third multi-way valve X port, 40, the fourth multi-way valve X port, 50, the fifth multi-way valve X port, 60, the multi-way valve Y port, 100, the control operation box, 101, the first pressure reducing valve, 102, the Second throttle valve, 103, solenoid ball valve, 104, first hydraulic control valve, 105, second hydraulic control valve, 106, first check valve, 107, second check valve, 108, first throttle valve, 109, second shuttle valve, 110, multi-way valve, 111, first multi-way valve, 112, second multi-way valve, 113, third multi-way valve, 114, fourth multi-way valve, 115, fifth multi-way valve, 116, first shuttle valve, 121, third hydraulic control check valve , 122, second hydraulically controlled one-way valve, 123, fourth hydraulically controlled ball valve, 124, third hydraulically controlled ball valve, 125, second hydraulically controlled ball valve 126, first hydraulically controlled ball valve, 127, first hydraulically controlled one-way valve, 128, first one-way throttle valve, 130, synchronous motor, 131, hydraulic motor, 132, one-way valve, 133, overflow valve, 140, first buffer valve, 141, first hydraulically controlled reversing valve, 142, second buffer valve 143, second hydraulically controlled reversing valve , 144, the first buffer hydraulic cylinder, 145, the second buffer hydraulic cylinder, 146, the third one-way valve, 147, the fourth one-way valve, 150, the control unit, 201, the motor, 202, the brake, 203, the second one-way throttle valve, 204, the stop valve, 205, the hydraulic valve, 206, the second pressure reducing valve, 207, the shuttle valve, 208, the buffer overflow valve, 209, the balance valve, 211, the first displacement sensor, 212, the second displacement sensor. DETAILED DESCRIPTION

[0012] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0013] like Figure 1-2The oil rig derrick base automatic raising and lowering control system shown in the figure comprises a control operation box 100, a first hydraulic winch 2, a second hydraulic winch 3, a first safety clamp 21, a second safety clamp 22, a first displacement sensor 211, a second displacement sensor 212, a first buffer hydraulic cylinder 144, a second buffer hydraulic cylinder 145 and a control unit 150; the control operation box 100 is provided with an oil inlet 11, an oil return port 12 and an oil drain port 13, the oil inlet 11 is connected to the oil inlet of the first throttle valve 108 and the multi-way valve 110 respectively; the multi-way valve 110 comprises a first multi-way valve 111, a second multi-way valve 112, a third multi-way valve 113 and a second multi-way valve 114. Valve 113, the fourth multi-way valve 114 and the fifth multi-way valve 115; the first multi-way valve 111 controls the first buffer hydraulic cylinder 144, and the second multi-way valve 112 controls the second buffer hydraulic cylinder 145; the first hydraulically controlled reversing valve 141 and the first buffer valve 140 are sequentially arranged between the rodless chamber of the first buffer hydraulic cylinder 144 and the return oil port 12, and the control port pressure oil of the first hydraulically controlled reversing valve 141 comes from the X port 10 of the first multi-way valve; the second hydraulically controlled reversing valve 143 and the second buffer valve 142 are sequentially arranged between the rodless chamber of the second buffer hydraulic cylinder 145 and the return oil 12, and the control port pressure oil of the second hydraulically controlled reversing valve 143 comes from the second multi-way valve X port 10 The first buffer hydraulic cylinder 144 has a fourth one-way valve 147 arranged between the rod chamber and the oil return port, and the second buffer hydraulic cylinder 145 has a third one-way valve 146 arranged between the rod chamber and the oil return port; the A and B ports of the third multi-way valve 113 are respectively connected to the lowering port and the lifting port of the first hydraulic winch 2 through the first hydraulically controlled ball valve 126 and the second hydraulically controlled ball valve 125, and the A and B ports of the fourth multi-way valve 114 are respectively connected to the lowering port and the lifting port of the second hydraulic winch 3 through the third hydraulically controlled ball valve 124 and the fourth hydraulically controlled ball valve 123; the A port of the fifth multi-way valve 115 is connected to the first hydraulic winch 2 through the first hydraulically controlled one-way valve 127. The lowering port of the hydraulic winch 2 is connected to the lowering port of the second hydraulic winch 3 through the second hydraulically controlled one-way valve 122; the B port of the fifth multi-way valve 115 is connected to the synchronous motor 130 through the first one-way throttle valve 128 and the third hydraulically controlled one-way valve 121, and the outlets of the synchronous motor 130 are respectively connected to the lifting and lowering ports of the first hydraulic winch 2 and the second hydraulic winch 3; the synchronous motor 130 includes two hydraulic motors 131, two one-way valves 132 and two overflow valves 133, wherein the one-way valve 132 and the overflow valve 133 are arranged between the outlets of the two hydraulic motors 131, and the outlets of the two overflow valves 133 are connected to the inlets of the two one-way valves 132 and communicate with the oil return port 12.

[0014] The control oil of the first hydraulically controlled one-way valve 127 and the second hydraulically controlled one-way valve 122 comes from the B port of the fifth multi-way valve 115, and the control oil of the third hydraulically controlled one-way valve 121 comes from the A port of the fifth multi-way valve 115; the spring chamber control oil of the first hydraulically controlled ball valve 126 and the second hydraulically controlled ball valve 125 comes from the X port 30 of the third multi-way valve, and the spring chamber control oil of the third hydraulically controlled ball valve 124 and the fourth hydraulically controlled ball valve 123 comes from the X port 40 of the fourth multi-way valve; the control chambers of the first hydraulically controlled ball valve 126, the second hydraulically controlled ball valve 125, the third hydraulically controlled ball valve 124, and the fourth hydraulically controlled ball valve 123 are connected to the X port 50 of the fifth multi-way valve. The first safety clamp 21 and the second safety clamp 22 are respectively communicated with the oil inlet 11 of the operation box through the first hydraulic control valve 104 and the second hydraulic control valve 105 through the first pressure reducing valve 101 and the first throttle valve 108. The first check valve 106 and the second check valve 107 are respectively arranged on the bypass of the working oil ports of the first safety clamp 21 and the second safety clamp 22. The outlets of the first check valve 106 and the second check valve 107 are communicated. The outlets of the first check valve 106 and the second check valve 107 are divided into two routes: one route is connected to the multi-way valve Y port 60 through the second throttle valve 102, and the other route is communicated with the oil drain route 13 through the electromagnetic ball valve 103; the control oil of the first hydraulic control valve 104 is taken from the fourth multi-way valve X port 40 and the fifth multi-way valve X port 50 through the first shuttle valve 116, and the control oil of the second hydraulic control valve 105 is taken from the third multi-way valve X port 40 and the fifth multi-way valve X port 50 through the second shuttle valve 109.

[0015] The first hydraulic winch 2 includes a motor 201 and a shuttle valve 207. The first hydraulic winch 2 is provided with a stop valve 204 at its lifting and lowering ports. A buffer overflow valve 208 is provided between the lifting and lowering ports of the first hydraulic winch 2. A balance valve 209 is provided at the lifting port. The opening and closing of the balance valve 209 is controlled by the pressure at the lower releasing port. The two oil inlets of the shuttle valve 207 are respectively connected to the lifting and lowering ports of the motor 201. The outlet of the shuttle valve 207 is connected to the brake 202 through the second pressure reducing valve 206, the hydraulic valve 205 and the second one-way throttle valve 203 and controls the action of the brake 202. The second hydraulic winch 3 has the same structure as the first hydraulic winch 2 and is arranged symmetrically on the left and right.

[0016] The first displacement sensor 211 and the second displacement sensor 212 are used to detect the lifting and lowering status of the base, and transmit the detection data to the control unit 150 in the control box in real time. Through the PLC control in the control unit 150, the lifting and lowering status of the derrick base is detected and automatically adjusted in real time.

[0017] The working principle of the present invention is: The automatic lifting and lowering control system of the oil drilling rig derrick base described in the present invention is composed of a synchronous lifting system, a buffer system and a brake system. The synchronous lifting system and the buffer system are controlled by an electric proportional multi-way valve, wherein the first multi-way valve 111 and the second multi-way valve 112 respectively control the first buffer hydraulic cylinder 144 and the second buffer hydraulic cylinder 145, a hydraulically controlled reversing valve and a buffer valve are sequentially arranged between the rodless chamber and the return oil of the buffer hydraulic cylinder, and a one-way valve is arranged between the rod chamber and the return oil port of the buffer hydraulic cylinder; the third multi-way valve 113, the fourth multi-way valve 114, and the fifth multi-way valve 115 control the synchronous lifting and lowering, wherein the fifth multi-way valve 115 is a synchronous valve, the A port is respectively connected to the lowering port of the left and right hydraulic winches, the B port is respectively connected to the lifting port of the left and right hydraulic winches through a synchronous motor, and the third multi-way valve 113, the fourth multi-way valve 114, and the fifth multi-way valve 115 control the synchronous lifting and lowering, wherein the fifth multi-way valve 115 is a synchronous valve, the A port is respectively connected to the lowering port of the left and right hydraulic winches, and the B port is respectively connected to the lifting port of the left and right hydraulic winches through a synchronous motor. The valve 113 and the fourth multi-way valve 114 are fine-tuning links, which are respectively connected to the lifting port and the lowering port of the left and right hydraulic winches through the hydraulically controlled ball valve, and the corresponding actuators are controlled to make fine adjustments when displacement deviation occurs; the brake system is composed of left and right safety clamps, and the first safety clamp 21 and the second safety clamp 22 are respectively connected to the oil inlet 11 of the operation box through the first hydraulically controlled valve 104 and the second hydraulically controlled valve 105 through the first pressure reducing valve 101 and the first throttle valve 108. The first check valve 106 and the second check valve 107 are respectively arranged on the bypass of the working oil port of the first safety clamp 21 and the second safety clamp 22. One way of the check valve outlet is connected to the multi-way valve Y port through the second throttle valve 102, and the other way is connected to the oil drain line 13 through the electromagnetic ball valve 103, which plays a secondary safety protection role for the safety of the derrick base lifting and lowering. The present invention realizes the full-automatic lifting of the derrick base, can realize the multiple protection of the safety of the left and right separate fine-tuning and the safety of lifting and lowering, and has the functions of high automation, good synchronization, safety and reliability.

[0018] The above are only preferred embodiments of the present invention. It should be noted that for ordinary technicians in this field, under the technical enlightenment provided by the present invention, as common knowledge in the electrical field, other equivalent variations and improvements can also be made, which should also be regarded as the protection scope of the present invention.

Claims

1. An automatic raising and lowering control system for a petroleum drilling rig derrick base, characterized in that: The invention comprises a control operation box (100), a first hydraulic winch (2), a second hydraulic winch (3), a first safety clamp (21), a second safety clamp (22), a first displacement sensor (211), a second displacement sensor (212), a first buffer hydraulic cylinder (144), a second buffer hydraulic cylinder (145) and a control unit (150); the control operation box (100) is provided with an oil inlet (11), an oil return port (12) and an oil drain port (13); the oil inlet (11) is respectively connected to the oil inlets of a first throttle valve (108) and a multi-way valve (110); The multi-way valve (110) comprises a first multi-way valve (111), a second multi-way valve (112), a third multi-way valve (113), a fourth multi-way valve (114) and a fifth multi-way valve (115); the first multi-way valve (111) controls the first buffer hydraulic cylinder (144), and the second multi-way valve (112) controls the second buffer hydraulic cylinder (145); a first hydraulically controlled reversing valve (141), a first buffer valve (140), and a first hydraulically controlled reversing valve (141) are sequentially arranged between the rodless chamber of the first buffer hydraulic cylinder (144) and the oil return port (12). The control port pressure oil of the valve (141) comes from the X port (10) of the first multi-way valve; the second hydraulically controlled reversing valve (143) and the second buffer valve (142) are sequentially arranged between the rodless portion and the oil return portion (12) of the second buffer hydraulic cylinder (145); the control port pressure oil of the second hydraulically controlled reversing valve (143) comes from the X port (20) of the second multi-way valve; the fourth check valve (147) is arranged between the rod chamber and the oil return port of the first buffer hydraulic cylinder (144); and the third check valve (146) is arranged between the rod chamber and the oil return port of the second buffer hydraulic cylinder (145); The A and B ports of the third multi-way valve (113) are connected to the lowering port and the raising and lowering port of the first hydraulic winch (2) through the first hydraulically controlled ball valve (126) and the second hydraulically controlled ball valve (125), respectively; the A and B ports of the fourth multi-way valve (114) are connected to the lowering port and the raising and lowering port of the second hydraulic winch (3) through the third hydraulically controlled ball valve (124) and the fourth hydraulically controlled ball valve (123), respectively; the A port of the fifth multi-way valve (115) is connected to the lowering port of the first hydraulic winch (2) through the first hydraulically controlled check valve (127) and is connected to the lowering port of the second hydraulic winch (3) through the second hydraulically controlled check valve (122); the B port of the fifth multi-way valve (115) is connected to the synchronous motor (130) through the first one-way throttle valve (128) and the third hydraulically controlled check valve (121); the outlets of the synchronous motor (130) are connected to the raising and lowering ports of the first hydraulic winch (2) and the second hydraulic winch (3), respectively; The synchronous motor (130) comprises two hydraulic motors (131), two one-way valves (132) and two overflow valves (133), wherein the one-way valve (132) and the overflow valve (133) are arranged between the outlets of the two hydraulic motors (131), and the outlets of the two overflow valves (133) are connected to the inlets of the two one-way valves (132) and communicate with the oil return port (12).

2. The automatic raising and lowering control system for the oil drilling rig derrick base according to claim 1 is characterized by: The control oil of the first hydraulically controlled non-return valve (127) and the second hydraulically controlled non-return valve (122) comes from the B port of the fifth multi-way valve (115), and the control oil of the third hydraulically controlled non-return valve (121) comes from the A port of the fifth multi-way valve (115); the control oil of the spring chambers of the first hydraulically controlled ball valve (126) and the second hydraulically controlled ball valve (125) comes from the X port (30) of the third multi-way valve, and the control oil of the spring chambers of the third hydraulically controlled ball valve (124) and the fourth hydraulically controlled ball valve (123) comes from the X port (40) of the fourth multi-way valve; and the control chambers of the first hydraulically controlled ball valve (126), the second hydraulically controlled ball valve (125), the third hydraulically controlled ball valve (124), and the fourth hydraulically controlled ball valve (123) are connected to the X port (50) of the fifth multi-way valve.

3. The automatic raising and lowering control system for the oil drilling rig derrick base according to claim 2 is characterized by: The first safety clamp (21) and the second safety clamp (22) are respectively connected to the oil inlet (11) of the operation box through the first hydraulic control valve (104) and the second hydraulic control valve (105) through the first pressure reducing valve (101) and the first throttle valve (108). The first one-way valve (106) and the second one-way valve (107) are respectively provided on the bypass of the working oil ports of the first safety clamp (21) and the second safety clamp (22). The outlets of the first one-way valve (106) and the second one-way valve (107) are connected. The outlet of the second check valve (107) is divided into two routes: one route is connected to the multi-way valve Y port (60) through the second throttle valve (102), and the other route is connected to the oil drain route (13) through the electromagnetic ball valve (103); the control oil of the first hydraulic control valve (104) is taken from the fourth multi-way valve X port (40) and the fifth multi-way valve X port (50) through the first shuttle valve (116), and the control oil of the second hydraulic control valve (105) is taken from the third multi-way valve X port (40) and the fifth multi-way valve X port (50) through the second shuttle valve (109).

4. The automatic raising and lowering control system for the oil drilling rig derrick base according to claim 3 is characterized by: The first hydraulic winch (2) comprises a motor (201) and a rib valve (207); the lifting and lowering ports of the first hydraulic winch (2) are both provided with stop valves (204); a buffer overflow valve (208) is provided between the lifting and lowering ports of the first hydraulic winch (2); a balance valve (209) is provided at the lifting port; the opening and closing of the balance valve (209) is controlled by the pressure at the lower releasing port; two oil inlets of the shuttle valve (207) are respectively connected to the lifting and lowering ports of the motor (201); the outlet of the shuttle valve (207) is connected to the brake (202) through the second pressure reducing valve (206), the hydraulic valve (205), and the second one-way throttle valve (203) and controls the action of the brake (202); the second hydraulic winch (3) is completely identical in structure to the first hydraulic winch (2) and is arranged symmetrically on both sides.

5. The automatic raising and lowering control system for the oil drilling rig derrick base according to claim 4 is characterized by: The first displacement sensor (211) and the second displacement sensor (212) are used to detect the lifting and lowering status of the base, and transmit the detection data to the control unit (150) in the control box in real time. Through the control of the PLC in the control unit (150), the lifting and lowering status of the derrick base is detected in real time and automatically adjusted.

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