Winch emergency lowering and pressure compensation system

Abstract

The present application relates to marine scientific research equipment technical field, especially to a winch emergency lowering and pressure compensation system, it includes reversing valve, winch assembly, brake assembly and emergency function assembly, winch assembly includes power motor, reel and brake piece, reel is connected with the output end of power motor, brake piece is controlled to brake power motor by brake assembly, two cavities of power motor are communicated reversing valve and form working circuit respectively;Emergency function assembly includes energy accumulator and sequentially communicated first stop valve, hydraulic control valve and speed regulating valve, and first stop valve and speed regulating valve are communicated with two cavities of power motor and form emergency lowering circuit correspondingly, energy accumulator is communicated with one cavity of power motor through energy storage oil circuit, and energy accumulator is also communicated with two cavities of power motor through compensation oil circuit, control oil circuit for providing control oil source for brake assembly is arranged on working circuit and compensation oil circuit, and second stop valve is arranged on the control oil circuit of compensation oil circuit.

Description

Technical Field

[0001] This invention relates to the field of marine scientific research equipment technology, and in particular to an emergency lowering and pressure compensation system for a winch. Background Technology

[0002] Deep-sea science is a crucial frontier in scientific research, relying heavily on advanced technology and equipment. Manned submersibles, as a particularly important piece of equipment for deep-sea operations, can be used for underwater exploration, geological surveys, sample collection, pipeline repair, and salvage and rescue missions. During manned submersible operations, specialized deployment and retrieval equipment is required, using winches to lower the submersible from the deck to the surface or retrieve it from the surface back onto the mother ship's deck. During these operations, especially when the submersible is in mid-air, the ship's rolling and pitching motion at sea causes the submersible to sway back and forth, directly impacting the safety of the deployment and retrieval operations and potentially damaging the equipment. Therefore, it is necessary to improve the performance of winches and enhance the stability of deploying manned submersibles or other underwater exploration equipment. Summary of the Invention

[0003] Based on the above problems, the purpose of this invention is to provide an emergency lowering and pressure compensation system for a winch, which realizes the emergency lowering of the system load instruments and the pressure compensation function of the system oil circuit, thereby improving the operational safety and reliability of the winch and lowering equipment.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An emergency lowering and pressure compensation system for a winch includes a reversing valve, a winch assembly, a brake assembly, and an emergency function assembly, wherein:

[0006] The P port of the directional valve is connected to the pressure oil source, and the T port of the directional valve is connected to the oil tank.

[0007] The winch assembly includes a power motor, a drum, and a brake. The drum is connected to the output end of the power motor, and the brake is controlled by the brake assembly to brake the power motor. The two chambers of the power motor are respectively connected to the A port and B port of the reversing valve to form a working circuit.

[0008] The emergency function component includes an accumulator, a hydraulic control valve, a first speed control valve, and a first shut-off valve. The first shut-off valve, the hydraulic control valve, and the first speed control valve are connected in sequence, and the first shut-off valve and the first speed control valve are connected to the two chambers of the power motor to form an emergency release circuit. The accumulator is connected to one chamber of the power motor through an energy storage oil circuit. The accumulator is also connected to the two chambers of the power motor through a compensation oil circuit. Both the working circuit and the compensation oil circuit are equipped with control oil circuits that provide control oil sources for the brake assembly, and a second shut-off valve is installed on the control oil circuit of the compensation oil circuit.

[0009] Optionally, a second speed regulating valve is provided on the compensation oil circuit for adjusting the output flow rate of the stored oil source in the accumulator.

[0010] Optionally, a pressure reducing valve is provided on the compensation oil circuit to limit the output pressure of the stored oil source in the accumulator.

[0011] Optionally, the accumulator is also connected to the oil tank via a pressure relief oil circuit, and a first safety valve is installed on the pressure relief oil circuit.

[0012] Optionally, a third shut-off valve connected in parallel with the first safety valve is provided on the pressure relief oil line.

[0013] Optionally, a first check valve is provided on the energy storage oil circuit, which only allows the pressure oil source in the working circuit to flow to the accumulator.

[0014] Optionally, the energy storage oil circuit is equipped with a pressure sensor for detecting the pressure in the accumulator and a pressure gauge for displaying the pressure in the accumulator.

[0015] Optionally, a second check valve is provided in the compensation oil circuit, allowing only the stored oil in the accumulator to flow to the two chambers of the power motor.

[0016] Optionally, a balancing valve is provided on the working circuit to maintain the pressure and flow balance of the pressure oil source in the working circuit.

[0017] Optionally, a second safety valve is provided in the working circuit to relieve pressure from the oil source whose pressure in the working circuit is higher than the set value.

[0018] In summary, the beneficial effects of the present invention are as follows: compared with the prior art, the winch emergency lowering and pressure compensation system can, on the one hand, lower the load to the bottom in a timely manner after the retrieval equipment loses power, thereby eliminating safety hazards such as the impact of the load swinging in mid-air on the retrieval equipment and improving the safety of the entire retrieval equipment; on the other hand, through the pressure compensation of the accumulator, it can effectively compensate for the risk of hydraulic system cavitation that may occur during the load lowering process, which not only ensures the reliable operation of the retrieval equipment, but also protects the relevant hydraulic components and improves the reliability and service life of the entire retrieval equipment. Attached Figure Description

[0019] To more clearly illustrate and understand the technical solutions in the embodiments of the present invention, the accompanying drawings used in the background technology and embodiment descriptions of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0020] Figure 1This is a schematic diagram of the structure of the winch emergency lowering and pressure compensation system provided in an embodiment of the present invention.

[0021] In the picture:

[0022] 100. Reversing valve;

[0023] 200. Winch assembly; 201. Power motor; 202. Drum; 203. Brake components; 204. Working circuit; 205. Balance valve; 206. Second safety valve;

[0024] 300. Brake assembly; 301. Control hydraulic circuit;

[0025] 400. Emergency function component; 401. Accumulator; 402. Hydraulic control valve; 403. First speed control valve; 404. First shut-off valve; 405. Emergency release circuit; 406. Energy storage oil circuit; 407. Compensation oil circuit; 408. Second shut-off valve; 409. Second speed control valve; 410. Pressure reducing valve; 411. Pressure relief oil circuit; 412. First safety valve; 413. Third shut-off valve; 414. First check valve; 415. Pressure sensor; 416. Pressure gauge; 417. Second check valve. Detailed Implementation

[0026] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Please see Figure 1 As shown, this preferred embodiment provides a winch emergency lowering and pressure compensation system, including a reversing valve 100, a winch assembly 200, a brake assembly 300, and an emergency function assembly 400.

[0028] The P port of the reversing valve 100 is connected to the pressure oil source, and the T port of the reversing valve 100 is connected to the oil tank, which is used to switch the output direction of the pressure oil source.

[0029] The winch assembly 200 includes a power motor 201, a drum 202, and a brake 203. The drum 202 is connected to the output end of the power motor 201. The brake 203 is controlled by the brake assembly 300 to brake the power motor 201. The two chambers of the power motor 201 are respectively connected to port A and port B of the reversing valve 100 to form a working circuit 204. The winch assembly 200 here is a common hydraulic winch used to perform the function of raising and lowering loads (such as submersibles).

[0030] The brake assembly 300 reduces the input pressure oil source to the control oil source required for braking; its specific structure will not be described in detail here.

[0031] The emergency function component 400 includes an accumulator 401, a hydraulic control valve 402, a first speed control valve 403, and a first shut-off valve 404. The first shut-off valve 404, the hydraulic control valve 402, and the first speed control valve 403 are connected in sequence. The first shut-off valve 404 and the first speed control valve 403 are connected to the two chambers of the power motor 201 to form an emergency release circuit 405. The accumulator 401 is connected to one chamber of the power motor 201 through an energy storage oil circuit 406. The accumulator 401 is also connected to the two chambers of the power motor 201 through a compensation oil circuit 407. The working circuit 204 and the compensation oil circuit 407 are both equipped with a control oil circuit 301 that provides control oil to the brake assembly 300. The control oil circuit 301 of the compensation oil circuit 407 is equipped with a second shut-off valve 408.

[0032] During normal winch operation, the pressure oil source enters the working circuit 204, driving the power motor 201 to rotate in both directions, thus realizing the function of load raising and lowering. At the same time, the winch assembly 200 provides the control oil source to the brake assembly 300 to realize the braking function. In addition, a portion of the pressure oil source also charges the accumulator 401 through the energy storage oil circuit 406.

[0033] During the emergency lowering operation of the winch, there is no pressure oil input. The winch is pulled by the load itself, which will drive the power motor 201 to rotate. The stored oil source of the accumulator 401 provides control oil source to the brake assembly 300 to realize the braking function.

[0034] During emergency deployment and pressure compensation, the reserve oil source of the accumulator 401 enters the left and right chambers of the power motor 201 through the compensation oil circuit 407 to replenish the power motor 201 with oil in real time, so as to avoid the hydraulic system from sucking in air due to leakage of hydraulic components such as the power motor 201 and pipelines.

[0035] As an optional solution, a second speed regulating valve 409 is provided on the compensation oil circuit 407 for adjusting the output flow rate of the stored oil source in the accumulator 401.

[0036] As an optional solution, the compensation oil circuit 407 is equipped with a pressure reducing valve 410 for limiting the output pressure of the stored oil source in the accumulator 401.

[0037] As an alternative, the accumulator 401 is also connected to the oil tank through a pressure relief oil circuit 411. A first safety valve 412 is installed on the pressure relief oil circuit 411 to prevent the accumulator 401 from being overfilled with oil.

[0038] Furthermore, a third shut-off valve 413 is provided on the pressure relief oil circuit 411 in parallel with the first safety valve 412, which is used to drain oil from the accumulator 401 during equipment maintenance.

[0039] As an alternative, the energy storage oil circuit 406 is equipped with a first check valve 414 that only allows the pressure oil source in the working circuit 204 to flow to the accumulator 401, preventing the stored oil source from flowing back into the working circuit 204.

[0040] As an optional solution, the energy storage oil circuit 406 is equipped with a pressure sensor 415 for detecting the pressure in the accumulator 401 and a pressure gauge 416 for displaying the pressure in the accumulator 401, which directly reflects the oil pressure of the accumulator 401. When the pressure of the accumulator 401 is detected to be lower than the required value, the accumulator 401 can be filled with oil by operating the reversing valve 100 to perform a normal lifting action of the winch for a certain distance.

[0041] As an alternative, the compensation oil circuit 407 is equipped with a second check valve 417 that only allows the stored oil source in the accumulator 401 to flow to the two chambers of the power motor 201, preventing the pressure oil source from entering the compensation oil circuit 407 in reverse.

[0042] As an optional solution, a balancing valve 205 is provided on the working circuit 204 to maintain the pressure and flow balance of the pressure oil source in the working circuit 204, so as to ensure the stability of the oil pressure in the working circuit 204.

[0043] As an optional solution, a second safety valve 206 is provided in the working circuit 204 to relieve pressure from the oil source in the working circuit 204 when the pressure is higher than the set value, so as to relieve pressure in time when the pressure in the working circuit 204 is too high.

[0044] It should be noted that the above-mentioned optional implementation methods can be combined in any way, and the resulting implementation methods are all within the protection scope of this invention.

[0045] Cooperate Figure 1 The specific working principle of the winch emergency lowering and pressure compensation system is as follows:

[0046] When the winch is working normally, the pressure oil source supplies oil to the winch assembly 200 via the left or right position of the reversing valve 100. At the same time, the winch assembly 200 provides control oil to the brake assembly 300, which, in conjunction with the action of the reversing valve 100, opens the brake component 203, thereby realizing the normal winding and unwinding operation of the winch. At this time, the first shut-off valve 404, the second shut-off valve 408, and the third shut-off valve 413 in the emergency function assembly 400 are all in the closed state. When the drum 202 is lifting normally, the hydraulic oil, in addition to passing through the right position of the reversing valve 100 and the balance valve 205 to the lifting port (left port) of the power motor 201, also enters the accumulator 401 through the first one-way valve 414, realizing the oil filling function of the accumulator 401.

[0047] During the emergency lowering operation of the winch, the reversing valve 100 is in the neutral position. At this time, the first shut-off valve 404 and the second shut-off valve 408 in the emergency function component 400 are open. The stored oil source in the accumulator 401 provides control oil to the brake assembly 300 through the second speed regulating valve 409, the pressure reducing valve 410, and the second shut-off valve 408, thereby opening the brake component 203. At this time, the two chambers of the power motor 201 form an emergency lowering circuit 405 through the first shut-off valve 404, the hydraulic control valve 402, and the first speed regulating valve 403. Due to the tension generated by the load weight of the winch, the power motor 201 will rotate, and the first speed regulating valve 403 will regulate the rotation at a certain speed, thereby controlling the speed of the winch's emergency lowering and preventing stalling, thus realizing the emergency lowering function of the winch.

[0048] During the emergency lowering operation of the winch, the stored oil in the accumulator 401 is also connected to the two chambers of the power motor 201 through the second speed regulating valve 409, the pressure reducing valve 410 and the second check valve 417, respectively, to replenish the power motor 201 with oil in real time, thus avoiding the hydraulic system from sucking in air due to leakage of hydraulic components such as the power motor 201 and pipelines.

[0049] In summary, the aforementioned winch emergency lowering and pressure compensation system has the following advantages:

[0050] 1) Improved the safety of the take-up and release equipment, so that after the take-up and release equipment loses power, the load can be lowered to the bottom in time to eliminate the safety hazards such as the impact of the load swinging in the air on the system.

[0051] 2) Improved the reliability and service life of the launching and receiving equipment. Through the pressure compensation of the accumulator 401, the risk of hydraulic system cavitation that may occur during the load lowering process can be effectively compensated, which not only ensures the reliable operation of the system, but also protects the relevant hydraulic components and avoids premature damage to the components due to cavitation.

[0052] 3) The first speed control valve 403 can effectively regulate the emergency lowering speed, making the system run more smoothly;

[0053] 4) The hydraulic control valve 402 can actively cut off the oil circuit after the accumulator 401 loses pressure, which can effectively avoid load stall caused by pressure loss. At the same time, the brake component 203 also closes, achieving dual protection.

[0054] 5) The first check valve 414 can automatically complete the oil filling of the accumulator 401 during normal system operation;

[0055] 6) The first one-way valve 414 and the accumulator 401 can absorb pressure shocks during normal system operation, ensuring the stable operation of the take-up and release equipment.

[0056] The above embodiments merely illustrate the basic principles and characteristics of the present invention. The present invention is not limited to the above embodiments. Various changes and modifications can be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A winch emergency lowering and pressure compensation system, characterized in that, It includes a reversing valve (100), a winch assembly (200), a brake assembly (300), and an emergency function assembly (400). The P port of the reversing valve (100) is connected to a pressure oil source, and the T port of the reversing valve (100) is connected to an oil tank. The winch assembly (200) includes a power motor (201), a drum (202), and a brake (203). The drum (202) is connected to the output end of the power motor (201). The brake (203) is controlled by the brake assembly (300) to brake the power motor (201). The two chambers of the power motor (201) are respectively connected to the A port and B port of the reversing valve (100) to form a working circuit (204). The emergency function component (400) includes an accumulator (401), a hydraulic control valve (402), a first speed control valve (403), and a first shut-off valve (404). The first shut-off valve (404), the hydraulic control valve (402), and the first speed control valve (403) are sequentially connected. The first shut-off valve (404) and the first speed control valve (403) are connected to two chambers of the power motor (201) to form an emergency release circuit (405). The accumulator (401) The accumulator (401) is connected to one chamber of the power motor (201) via the energy storage oil circuit (406). The accumulator (401) is also connected to two chambers of the power motor (201) via the compensation oil circuit (407). The working circuit (204) and the compensation oil circuit (407) are both provided with control oil circuits (301) that provide control oil source for the brake assembly (300). A second shut-off valve (408) is provided on the control oil circuit (301) of the compensation oil circuit (407).

2. The winch emergency lowering and pressure compensation system according to claim 1, characterized in that, The compensation oil circuit (407) is equipped with a second speed regulating valve (409) for adjusting the output flow rate of the stored oil source in the accumulator (401).

3. The winch emergency lowering and pressure compensation system according to claim 1, characterized in that, The compensation oil circuit (407) is equipped with a pressure reducing valve (410) for limiting the output pressure of the stored oil source in the accumulator (401).

4. The winch emergency lowering and pressure compensation system according to claim 1, characterized in that, The accumulator (401) is also connected to the oil tank through a pressure relief oil passage (411), and a first safety valve (412) is provided on the pressure relief oil passage (411).

5. The winch emergency lowering and pressure compensation system according to claim 4, characterized in that, The pressure relief oil circuit (411) is equipped with a third shut-off valve (413) connected in parallel with the first safety valve (412).

6. The winch emergency lowering and pressure compensation system according to claim 1, characterized in that, The energy storage oil circuit (406) is equipped with a first check valve (414) that only allows the pressure oil source in the working circuit (204) to flow to the accumulator (401).

7. The winch emergency lowering and pressure compensation system according to claim 1, characterized in that, The energy storage oil circuit (406) is equipped with a pressure sensor (415) for detecting the pressure in the accumulator (401) and a pressure gauge (416) for displaying the pressure in the accumulator (401).

8. The winch emergency lowering and pressure compensation system according to claim 1, characterized in that, The compensation oil circuit (407) is equipped with a second one-way valve (417) that allows only the stored oil in the accumulator (401) to flow to the two chambers of the power motor (201).

9. The winch emergency lowering and pressure compensation system according to claim 1, characterized in that, The working circuit (204) is provided with a balancing valve (205) for maintaining the pressure and flow balance of the pressure oil source in the working circuit (204).

10. The winch emergency lowering and pressure compensation system according to claim 1, characterized in that, The working circuit (204) is equipped with a second safety valve (206) for relieving the pressure of the oil source in the working circuit (204) where the pressure is higher than the set value.

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