Oil injection device for deep-sea high-pressure-resistant equipment

Abstract

The oil injection device for the deep sea high-pressure-resistant equipment comprises a driving unit, the driving unit comprises a control assembly and an electric push rod electrically connected with the control assembly, and the electric push rod comprises a positioning pipe and a push rod; the piston unit comprises a cylinder body, a piston and a piston rod which are arranged in the cylinder, and an oil-gas exchange hole formed in the bottom of the cylinder body; the connecting piece connects the push rod and the piston rod; one end of the three-way valve is connected with the oil-gas exchange hole; the second end is connected with the oil drum through the flowmeter; the control assembly is connected with the three-way valve and the flowmeter. According to the technical scheme, the three-way valve is adopted, the PLC is adopted to drive the electric push rod to drive the piston connecting rod to achieve linkage, the compensation oil in the oil barrel is sucked in the upward pulling process, and under the state that the three-way valve is switched to communicate with the deep-sea high-pressure-resistant equipment, the compensation oil is pressed into the deep-sea high-pressure-resistant equipment, and gas-liquid conversion in the deep-sea high-pressure-resistant equipment is achieved; the defects that a liquid injection port of deep-sea high-pressure-resistant equipment is small and is not provided with an exhaust port are overcome.

Description

Technical Field

[0001] The utility model relates to an oil injection device for deep-sea high-pressure resistant equipment, belonging to the technical field of deep-sea high-pressure resistant equipment. Background Art

[0002] Due to its special operating environment, deep-sea high-pressure resistant equipment is often made into high-pressure resistant equipment, that is, a miniaturized and lightweight design is adopted while ensuring strength. At the same time, the air in the deep-sea high-pressure resistant equipment compartment needs to be exhausted and compensation oil needs to be added to compensate for the huge pressure caused by the depth.

[0003] For these reasons, deep-sea high-pressure equipment is often manufactured with fewer openings to ensure a complete appearance, uniform pressure bearing, and minimize weak links. Consequently, deep-sea high-pressure equipment typically features only a single, relatively small oil inlet and often lacks an exhaust port, hindering smooth injection of compensating oil. Therefore, a new oil injection device is needed that can efficiently inject oil even with a relatively small aperture. Utility Model Content

[0004] Therefore, the purpose of the present invention is to provide an oil filling device for deep-sea high-pressure resistant equipment, so as to overcome the disadvantage that deep-sea high-pressure resistant equipment usually only has a single oil filling port with a small aperture and is not equipped with an exhaust port, resulting in low oil filling efficiency.

[0005] In order to achieve the above-mentioned object, the present invention provides an oil injection device for deep-sea high-pressure resistant equipment, comprising:

[0006] A drive unit, comprising a control assembly and an electric push rod electrically connected to the control assembly, wherein the electric push rod comprises a sleeved positioning tube and a push rod;

[0007] The piston unit comprises a cylinder body, a piston and a piston rod arranged inside the cylinder, and an oil-gas exchange hole arranged at the bottom of the cylinder body;

[0008] A connecting piece, with two ends respectively connected to the push rod and the piston rod;

[0009] A three-way valve has one end connected to the oil-gas exchange hole, a second end connected to the oil barrel through a flow meter, and a third end connected to the deep-sea high-pressure resistant equipment; the control component is electrically connected to the three-way valve and the flow meter.

[0010] Furthermore, the control component is a PLC.

[0011] Furthermore, an exhaust hole is provided on the top of the cylinder body.

[0012] Furthermore, the working pressure of the cylinder is ≤0.2 MPa.

[0013] An embodiment of the utility model provides an oil filling device for deep-sea high-pressure resistant equipment, which adopts a three-way valve and a PLC-driven electric push rod to drive the piston connecting rod to achieve linkage, so that the compensation oil in the oil barrel is sucked into the deep-sea high-pressure resistant equipment during the pulling-up process, and when the three-way valve is switched to connect to the deep-sea high-pressure resistant equipment, the compensation oil is pressed into the deep-sea high-pressure resistant equipment, thereby realizing the gas-liquid conversion inside the deep-sea high-pressure resistant equipment, overcoming the shortcomings of the existing deep-sea high-pressure resistant equipment that the liquid filling port is small and is not equipped with an exhaust port. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The utility model provides a connection diagram of an oil injection device for deep-sea high-pressure resistant equipment.

[0015] In the figure: 1. Drive unit; 2. Control assembly; 3. Electric push rod; 4. Positioning tube; 5. Push rod; 6. Piston unit; 7. Cylinder body; 8. Piston; 9. Piston rod; 10. Oil-gas exchange hole; 11. Connecting piece; 12. Three-way valve; 13. Oil drum; 14. Deep-sea high-pressure resistant equipment; 15. Exhaust hole. DETAILED DESCRIPTION

[0016] The following is a detailed description of the present invention using the accompanying drawings and specific embodiments. Deep-sea high-pressure equipment is typically manufactured with minimal openings to ensure a complete appearance, uniform pressure bearing, and minimize weak links. Consequently, deep-sea high-pressure equipment typically features only a single, relatively small oil inlet and often lacks an exhaust port, which hinders the smooth injection of compensating oil. Therefore, a lubrication device that can efficiently inject oil even with a relatively small aperture is desired.

[0017] Example 1

[0018] like Figure 1 As shown, the utility model provides an oil injection device for deep-sea high-pressure resistant equipment, comprising:

[0019] The drive unit 1 includes a control component 2 and an electric push rod 3 electrically connected to the control component 2, wherein the electric push rod 3 includes a sleeved positioning tube 4 and a push rod 5; wherein the control component 2 is a programmable logic controller (PLC).

[0020] The piston unit 6 comprises a cylinder 7, a piston 8 and a piston rod 9 disposed within the cylinder, and an oil-gas exchange hole 10 disposed at the bottom of the cylinder 7. An exhaust hole 15 is provided at the top of the cylinder 7. The operating pressure of the cylinder 7 is ≤ 0.2 MPa. The PLC controls the speed and frequency of the electric push rod 3 through a pre-set program, thereby achieving reciprocating motion of the push rod 5 within the positioning tube 4.

[0021] The connecting member 11 has two ends respectively connected to the push rod 5 and the piston rod 9; the connecting member 11 includes but is not limited to a mechanical connecting rod.

[0022] A three-way valve 12 is connected to the oil-gas exchange port 10 at one end, to an oil drum 13 via a flow meter at the second end, and to the deep-sea high-pressure equipment 14 at the third end. The connections must be sealed. The control assembly 2 is electrically connected to the three-way valve 12 and the flow meter. The three-way valve 12 is used to exchange the make-up oil in the oil drum 13 with the gas in the deep-sea high-pressure equipment 14.

[0023] The specific working process of the above-mentioned oil injection device is as follows:

[0024] First, by controlling the three-way valve 12, the control method includes but is not limited to using PLC to control it, so that it is in an open circuit state between the cylinder body 7 and the oil barrel 13, and a disconnected circuit state between the cylinder body 7 and the deep-sea high-pressure resistant equipment 14; the PLC drives the push rod 5 to move and drives the piston rod 9 to move upward to the maximum limit. At this time, a negative pressure is formed inside the cylinder due to the movement of the piston rod 9, so that the compensation oil is sucked into the oil barrel 13; according to the feedback formed by the flow meter, when the compensation oil inside the cylinder body 7 reaches half, the three-way valve 12 is switched to open the circuit between the cylinder body 7 and the deep-sea high-pressure resistant equipment 14, and disconnect the circuit between the cylinder body 7 and the oil barrel 13, so that the air in the deep-sea high-pressure resistant equipment 14 is sucked into the cylinder body 7. At this time, the air inside the cylinder body 7 is located at the top and the compensation oil is located at the bottom; the PLC drives the electric push rod 3 and links the piston rod 9 to press down, thereby pressing the compensation oil into the deep-sea high-pressure resistant equipment 14. The downward pressure process needs to ensure that the cylinder body 7 is within a safe pressure range, such as 0.2MPa.

[0025] By repeating the above working process, the gas-liquid conversion is completed until the original air in the deep-sea equipment is completely filled with the compensation oil.

[0026] An embodiment of the utility model provides an oil filling device for deep-sea high-pressure resistant equipment, which adopts a three-way valve and a PLC-driven electric push rod to drive the piston connecting rod to achieve linkage, so that the compensation oil in the oil barrel is sucked into the deep-sea high-pressure resistant equipment during the pulling-up process, and when the three-way valve is switched to connect to the deep-sea high-pressure resistant equipment, the compensation oil is pressed into the deep-sea high-pressure resistant equipment, thereby realizing the gas-liquid conversion inside the deep-sea high-pressure resistant equipment, overcoming the shortcomings of the existing deep-sea high-pressure resistant equipment that the liquid filling port is small and is not equipped with an exhaust port.

Claims

1. An oil injection device for deep-sea high-pressure equipment, characterized in that: include: A drive unit (1) comprises a control assembly (2) and an electric push rod (3) electrically connected to the control assembly (2), wherein the electric push rod (3) comprises a sleeved positioning tube (4) and a push rod (5); A piston unit (6) comprises a cylinder body (7), a piston (8) and a piston rod (9) arranged inside the cylinder, and an oil-gas exchange hole (10) arranged at the bottom of the cylinder body (7); A connecting member (11), the two ends of which are respectively connected to the push rod (5) and the piston rod (9); A three-way valve (12) has one end connected to the oil-gas exchange hole (10), a second end connected to the oil barrel (13) via a flow meter, and a third end connected to the deep-sea high-pressure resistant equipment (14); the control component (2) is electrically connected to the three-way valve (12) and the flow meter.

2. The oil injection device for deep-sea high-pressure equipment according to claim 1, characterized in that: The control component (2) is a PLC.

3. The oil injection device for deep-sea high-pressure equipment according to claim 1, characterized in that: An exhaust hole (15) is provided on the top of the cylinder body (7).

4. The oil injection device for deep-sea high-pressure equipment according to claim 1, characterized in that: The working pressure of the cylinder (7) is ≤0.2 MPa.

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