Petroleum drilling machine derrick base automatic control system for lifting and placing hydraulic cylinder

Abstract

The utility model discloses a petroleum drilling machine derrick base automatic control system for lifting and placing a hydraulic cylinder, which comprises a control operation box, a first hydraulic cylinder and a second hydraulic cylinder, the control operation box comprises a multi-way valve, a synchronous motor and a hydraulic control ball valve; an oil inlet, an oil return port and an oil drainage port of the multi-way valve are connected with an oil inlet, an oil return port and an oil drainage port of the operation box; the electric proportional multi-way valve is adopted to control the hydraulic cylinder to achieve automatic lifting and placing of the derrick base, the lifting and placing rigidity is good, the lifting and placing synchronism is achieved through the high-precision synchronous motor, the synchronization precision is high, and the synchronous lifting and placing function and the independent action function are achieved; the explosion-proof valve and the balance valve in the system can achieve hovering at any position in the lifting and placing process of the derrick base, the safety in the lifting and placing process is guaranteed, and the dual safety protection function is achieved.

Description

Technical Field

[0001] This utility model relates to the field of oil drilling rig technology, specifically to an automatic control system for the hydraulic cylinder lifting and lowering of an oil drilling rig derrick base. Background Technology

[0002] Traditionally, the raising and lowering of the derrick base of oil drilling rigs is mainly achieved using drilling winches. With the continuous development of oil drilling rig technology, especially the increasing demand for automated drilling rigs, the use of hydraulic cylinders to raise and lower the derrick base is becoming increasingly widespread, particularly in situations where the structure is limited, the safety requirements of drilling equipment are high, and rapid relocation is needed. However, currently, when using hydraulic cylinders to raise and lower the derrick base, manual operation is required, resulting in low automation and compromised personnel and equipment safety. In particular, when asynchrony occurs, manual adjustment is complex and ineffective, prone to over-adjustment or errors, which can easily lead to safety accidents such as tearing or falling of the derrick or base. This method cannot meet the requirements for automated raising and lowering of the derrick base of oil drilling rigs. Utility Model Content

[0003] The purpose of this invention is to provide an automatic control system for the hydraulic cylinder lifting and lowering of the derrick base of an oil drilling rig, in order to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an automatic control system for the hydraulic cylinder lifting and lowering of an oil drilling rig derrick base, comprising a control operation box, a first hydraulic cylinder, and a second hydraulic cylinder; the control operation box includes a multi-way valve, a synchronous motor, and a hydraulic ball valve, wherein the oil inlet, oil return port, and oil drain port of the multi-way valve are connected to the oil inlet, oil return port, and oil drain port of the control box.

[0005] The multi-way valve includes a first multi-way valve, a second multi-way valve, and a third multi-way valve. Ports A and B of the first multi-way valve are connected to the lifting and lowering ports of the first hydraulic cylinder via a first hydraulically controlled ball valve and a second hydraulically controlled ball valve, respectively. Ports A and B of the fourth multi-way valve are connected to the lifting and lowering ports of the second hydraulic cylinder via a third hydraulically controlled ball valve and a fourth hydraulically controlled ball valve, respectively. Port A of the third multi-way valve is connected to the lifting port of the first hydraulic cylinder via a first hydraulically controlled check valve and to the lifting port of the second hydraulic cylinder via a second hydraulically controlled check valve. Port B of the third multi-way valve is connected to a synchronous motor via a first one-way throttle valve and a third hydraulically controlled check valve. The outlet of the synchronous motor is connected to the lowering ports of the first and second hydraulic cylinders, respectively.

[0006] The synchronous motor includes two hydraulic motors, two check valves, and two relief valves. The check valves and relief valves are located between the outlets of the two hydraulic motors, and the outlets of the two relief valves are connected to the inlets of the two check valves and communicate with the return port.

[0007] Preferably, the control oil for the first and second hydraulic check valves comes from port B of the third section of the multi-way valve, and the control oil for the third and fourth hydraulic check valves comes from port A of the third section of the multi-way valve.

[0008] Preferably, the spring chamber control oil of the first and second hydraulic ball valves comes from the first port of the multi-way valve, and the spring chamber control oil of the third and fourth hydraulic ball valves comes from the second port of the multi-way valve; the control chambers of the first, second, third, and fourth hydraulic ball valves are connected to the third port of the multi-way valve.

[0009] Preferably, the lifting port of the first hydraulic cylinder is connected to the rodless chamber of the first hydraulic cylinder body through a first balance valve and a first explosion-proof valve, and the lowering port of the first hydraulic cylinder is connected to the rod chamber of the first hydraulic cylinder body through a second balance valve and a second explosion-proof valve.

[0010] Preferably, the second hydraulic cylinder has the same structure as the first hydraulic cylinder. The first hydraulic cylinder is equipped with a first displacement sensor, and the second hydraulic cylinder is equipped with a second displacement sensor. The data from the first and second displacement sensors are transmitted to the control unit in the control box in real time. After being controlled by the PLC in the control unit, the lifting and lowering status of the derrick base is detected in real time and automatically adjusted.

[0011] The working principle of this utility model is as follows:

[0012] The automatic control system for the hydraulic cylinder lifting and lowering of an oil drilling rig derrick base, as described in this utility model, consists of a control box, a first hydraulic cylinder, and a second hydraulic cylinder. It employs an electro-proportional multi-way valve for control. Ports A and B of the first section of the multi-way valve are connected to the lifting and lowering ports of the first hydraulic cylinder via a first hydraulically controlled ball valve and a second hydraulically controlled ball valve, respectively. Ports A and B of the second section of the multi-way valve are connected to the lifting and lowering ports of the second hydraulic cylinder via a third hydraulically controlled ball valve and a fourth hydraulically controlled ball valve, respectively. Port A of the third section of the multi-way valve is connected to the lifting port of the first hydraulic cylinder via a first hydraulically controlled check valve and to the lifting port of the second hydraulic cylinder via a second hydraulically controlled check valve. Port B of the third section of the multi-way valve is connected to a synchronous motor via a first one-way throttle valve and a third hydraulically controlled check valve. The outlet of the synchronous motor is connected to the lowering ports of both the first and second hydraulic cylinders. The first and second multi-way valves are fine-tuning connections, connected to the lifting and lowering ports of the left and right hydraulic cylinders respectively via hydraulically controlled ball valves. When the first and second displacement sensors detect a displacement deviation between the first and second hydraulic cylinders, the control unit fine-tunes the first and second multi-way valves to automatically synchronize them. The third multi-way valve is a synchronization connection, ensuring the synchronicity of the lifting of the left and right hydraulic cylinders via a synchronous motor. The lifting port of the first hydraulic cylinder is connected to the rodless chamber of the cylinder body via a first balance valve and a first explosion-proof valve, while the lowering port is connected to the rod chamber of the cylinder body via a second balance valve and a second explosion-proof valve, providing secondary safety protection for the lifting and lowering of the derrick base. This invention achieves fully automatic lifting of the derrick base, enables independent fine-tuning of the left and right sides, and provides multiple protections for lifting and lowering safety, featuring high automation, good synchronization, and reliable safety.

[0013] The beneficial effects of this utility model are as follows:

[0014] This invention employs an electro-proportional multi-way valve to control a hydraulic cylinder for automatic raising and lowering of the derrick base. It features high raising and lowering rigidity and utilizes a high-precision synchronous motor to achieve synchronicity. The system not only has synchronous raising and lowering capabilities but also the ability to operate independently. A PLC automatically detects and compares the movements of the two cylinders. When a synchronization deviation occurs, the system automatically adjusts the fine-tuning mechanism to ensure synchronicity, resulting in a high degree of automation and excellent synchronization. Furthermore, the explosion-proof valve and balance valve in the system allow the derrick base to be suspended at any position during raising and lowering, ensuring safety and providing dual safety protection. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of an automatic control system for a hydraulic cylinder lifting and lowering oil drilling rig derrick base according to the present invention.

[0016] In the diagram: 11. Oil inlet, 12. Oil return port, 13. Oil drain port, 70. First port of multi-way valve (X port), 80. Second port of multi-way valve (X port), 90. Third port of multi-way valve (X port), 116. First port of multi-way valve, 117. Second port of multi-way valve, 118. Third port of multi-way valve, 119. Multi-way valve, 121. Third hydraulically controlled check valve, 122. Second hydraulically controlled check valve, 123. Fourth hydraulically controlled ball valve, 124. Third hydraulically controlled ball valve, 125. Second hydraulically controlled ball valve, 12 6. First hydraulic ball valve; 127. First hydraulic check valve; 128. First one-way throttle valve; 130. Synchronous motor; 131. Hydraulic motor; 132. Check valve; 133. Relief valve; 400. First hydraulic cylinder; 500. Second hydraulic cylinder; 403. First balance valve; 402. First explosion-proof valve; 401. Hydraulic cylinder body; 404. First displacement sensor; 405. Second displacement sensor; 407. Second balance valve; 406. Second explosion-proof valve. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings.

[0018] like Figure 1 The diagram illustrates an automatic control system for the hydraulic cylinder lifting and lowering of an oil drilling rig derrick base, comprising a control box 300, a first hydraulic cylinder 400, and a second hydraulic cylinder 500. The control box 300 includes a multi-way valve 119, a synchronous motor 130, and a hydraulically controlled ball valve. The inlet, return, and drain ports of the multi-way valve 119 are connected to the inlet 11, return 12, and drain port 13 of the control box 300. The multi-way valve 119 includes a first multi-way valve section 116, a second multi-way valve section 117, and a third multi-way valve section 118. Ports A and B of the first multi-way valve section 116 are connected to the lifting and lowering ports of the first hydraulic cylinder 400 via a first hydraulically controlled ball valve 126 and a second hydraulically controlled ball valve 125, respectively. Ports A and B of the second multi-way valve section 117 are connected via a third hydraulically controlled ball valve 124 and a fourth hydraulically controlled ball valve 125, respectively. 3 is connected to the lifting port and lowering port of the second hydraulic cylinder 500; port A of the third section of the multi-way valve 118 is connected to the lifting port of the first hydraulic cylinder 400 through the first hydraulic control check valve 127 and to the lifting port of the second hydraulic cylinder 500 through the second hydraulic control check valve 122; port B of the third section of the multi-way valve 118 is connected to the synchronous motor 130 through the first one-way throttle valve 128 and the third hydraulic control check valve 121, and the outlet of the synchronous motor 130 is connected to the lowering ports of the first hydraulic cylinder 400 and the second hydraulic cylinder 500 respectively; the synchronous motor 130 includes two hydraulic motors 131, two check valves 132 and two relief valves 133, wherein the check valves 132 and relief valves 133 are arranged between the outlets of the two hydraulic motors 131, and the outlets of the two relief valves 133 are connected to the inlets of the two check valves 132 and communicate with the return port 12.

[0019] The control oil for the first hydraulic check valve 127 and the second hydraulic check valve 122 comes from port B of the third port 118 of the multi-way valve, and the control oil for the third hydraulic check valve 121 comes from port A of the third port 118 of the multi-way valve. The control oil for the spring chambers of the first hydraulic ball valve 126 and the second hydraulic ball valve 125 comes from port X 70 of the first port of the multi-way valve, and the control oil for the spring chambers of the third hydraulic ball valve 124 and the fourth hydraulic ball valve 123 comes from port X 80 of the second port of the multi-way valve. The control chambers of the first hydraulic ball valve 126, the second hydraulic ball valve 125, the third hydraulic ball valve 124, and the fourth hydraulic ball valve 123 are connected to port X 90 of the third port of the multi-way valve.

[0020] The lifting port of the first hydraulic cylinder 400 is connected to the rodless chamber of the first hydraulic cylinder body 401 through the first balance valve 403 and the first explosion-proof valve 402. The lowering port of the first hydraulic cylinder 400 is connected to the rod chamber of the first hydraulic cylinder body 401 through the second balance valve 407 and the second explosion-proof valve 406. The second hydraulic cylinder 500 has the same structure as the first hydraulic cylinder 400. The first hydraulic cylinder 400 is equipped with a first displacement sensor 404, and the second hydraulic cylinder 500 is equipped with a second displacement sensor 405. The data from the first displacement sensor 404 and the second displacement sensor 405 are transmitted in real time to the control unit 150 in the control box. After being controlled by the PLC in the control unit 150, the lifting and lowering status of the derrick base is detected in real time and automatically adjusted.

[0021] The working principle of this utility model is as follows:

[0022] The automatic control system for the hydraulic cylinder lifting and lowering of an oil drilling rig derrick base, as described in this utility model, consists of a control operation box 300, a first hydraulic cylinder 400, and a second hydraulic cylinder 500. It is controlled by an electro-proportional multi-way valve 119. Ports A and B of the first section 116 of the multi-way valve are connected to the lifting and lowering ports of the first hydraulic cylinder 400 via a first hydraulically controlled ball valve 126 and a second hydraulically controlled ball valve 125, respectively. Ports A and B of the second section 117 of the multi-way valve are connected to a third hydraulically controlled ball valve 124 and a fourth hydraulically controlled ball valve 125, respectively. Valve 123 is connected to the lifting port and lowering port of the second hydraulic cylinder 500; port A of the third section of the multi-way valve 118 is connected to the lifting port of the first hydraulic cylinder 400 through the first hydraulic control check valve 127 and to the lifting port of the second hydraulic cylinder 500 through the second hydraulic control check valve 122; port B of the third section of the multi-way valve 118 is connected to the synchronous motor 130 through the first one-way throttle valve 128 and the third hydraulic control check valve 121, and the outlet of the synchronous motor 130 is connected to the lowering ports of the first hydraulic cylinder 400 and the second hydraulic cylinder 500 respectively. The first and second multi-way valves 116 and 117 are fine-tuning connections, connected to the lifting and lowering ports of the left and right hydraulic cylinders respectively via hydraulic ball valves. When the first displacement sensor 404 and the second displacement sensor 405 detect a displacement deviation between the first hydraulic cylinder 400 and the second hydraulic cylinder 500, the control unit 150 fine-tunes the first and second multi-way valves 116 and 117 to automatically synchronize the first and second hydraulic cylinders 400. The third multi-way valve 118 is a synchronization connection, ensuring the synchronicity of the lifting of the left and right hydraulic cylinders via the synchronization motor 130. The lifting port of the first hydraulic cylinder 400 is connected to the rodless chamber of the first hydraulic cylinder body 401 via the first balance valve 403 and the first explosion-proof valve 402, and the lowering port of the first hydraulic cylinder 400 is connected to the rod chamber of the hydraulic cylinder body 401 via the second balance valve 407 and the second explosion-proof valve 406, providing secondary safety protection for the lifting and lowering of the derrick base. This invention achieves fully automatic lifting of the derrick base, enables independent fine-tuning on the left and right sides, and provides multiple protections for lifting and lowering safety. It features a high degree of automation, good synchronization, and reliable safety.

[0023] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, based on the technical teachings provided by this utility model and as common knowledge in the electrical field, other equivalent modifications and improvements can be made, and these should also be considered within the protection scope of this utility model.

Claims

1. An automatic control system for a petroleum drilling derrick substructure with hydraulic cylinder lifting and lowering, characterized in that: Including control operation box (300), first hydraulic cylinder (400), second hydraulic cylinder (500);The control operation box (300) includes multiway valve (119), synchronous motor (130) and liquid control ball valve, the oil inlet, oil return, oil drain of multiway valve (119) are connected with the oil inlet (11), oil return (12), oil drain (13) of operation box (300); The multiway valve (119) includes multiway valve first link (116), multiway valve second link (117), multiway valve third link (118), the A, B port of multiway valve first link (116) is connected with the lifting port and the lower port of first hydraulic cylinder (400) through first liquid control ball valve (126), second liquid control ball valve (125) respectively, the A, B port of multiway valve second link (117) is connected with the lifting port and the lower port of second hydraulic cylinder (500) through third liquid control ball valve (124), fourth liquid control ball valve (123) respectively;Multiway valve third link (118) A is connected with the lifting port of first hydraulic cylinder (400) through first liquid control check valve (127) and is connected with the lifting port of second hydraulic cylinder (500) through second liquid control check valve (122);Multiway valve third link (118) B port is connected with synchronous motor (130) through first check valve (128), third liquid control check valve (121), and the outlet of synchronous motor (130) is connected with the lower port of first hydraulic cylinder (400) and second hydraulic cylinder (500) respectively; The synchronous motor (130) includes two hydraulic motors (131), two check valves (132) and two overflow valves (133), wherein check valve (132) and overflow valve (133) are arranged between the outlets of two hydraulic motors (131), and the outlets of two overflow valves (133) are connected with the inlets of two check valves (132) and communicate with oil return (12).

2. The automatic control system for the hydraulic cylinder lifting and landing of the oil drilling derrick substructure according to claim 1, characterized in that: The control oil of first liquid control check valve (127) and second liquid control check valve (122) comes from the B port of multiway valve third link (118), and the control oil of third liquid control check valve (121) comes from the A port of multiway valve third link (118).

3. The automatic control system for the hydraulic cylinder-raised and lowered oil drilling derrick substructure of claim 2, characterized in that: The spring cavity control oil of first liquid control ball valve (126) and second liquid control ball valve (125) comes from multiway valve first link X port (70), and the spring cavity control oil of third liquid control ball valve (124) and fourth liquid control ball valve (123) comes from multiway valve second link X port (80);The control cavity of first liquid control ball valve (126), second liquid control ball valve (125), third liquid control ball valve (124) and fourth liquid control ball valve (123) is connected with multiway valve third link X port (90).

4. The automatic control system for the hydraulic cylinder lifting and landing of the oil drilling derrick substructure according to claim 3, characterized in that: The lifting port of first hydraulic cylinder (400) is connected with the rodless cavity of first hydraulic cylinder body (401) through first balance valve (403), first explosion-proof valve (402), and the lower port of first hydraulic cylinder (400) is connected with the rod cavity of first hydraulic cylinder body (401) through second balance valve (407), second explosion-proof valve (406).

5. The automatic control system for the hydraulic cylinder-raised and lowered oil drilling derrick substructure of claim 4, characterized in that: The second hydraulic cylinder (500) is same in structure with the first hydraulic cylinder (400), the first displacement sensor (404) is arranged on the first hydraulic cylinder (400), the second displacement sensor (405) is arranged on the second hydraulic cylinder (500), the data of the first displacement sensor (404) and the second displacement sensor (405) is transmitted to the control unit (150) in the control box in real time and is controlled by the PLC in the control unit (150), and the derrick base lifting state is detected in real time and automatically adjusted.

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