Emergency lowering and pressure compensation system for winch

Abstract

The utility model relates to the technical field of marine scientific investigation equipment, in particular to a winch emergency lowering and pressure compensation system which comprises a reversing valve, a winch assembly, a brake assembly and an emergency function assembly. The brake part is controlled by a brake assembly to brake the power motor, and two cavities of the power motor are communicated with the reversing valve to form a working loop. The emergency function assembly comprises an energy accumulator, a first stop valve, a hydraulic control valve and a speed regulating valve, the first stop valve, the hydraulic control valve and the speed regulating valve are sequentially communicated, the first stop valve and the speed regulating valve are correspondingly communicated with two cavities of the power motor to form an emergency lowering loop, and the energy accumulator is communicated with one cavity of the power motor through an energy storage oil way. The energy accumulator is further communicated with the two cavities of the power motor through a compensation oil way, the working loop and the compensation oil way are each provided with a control oil way for providing a control oil source for the brake assembly, and a second stop valve is arranged on the control oil way of the compensation oil way.

Description

Technical Field

[0001] The utility model relates to the technical field of marine scientific research equipment, in particular to a winch emergency lowering and pressure compensation system. Background Art

[0002] Deep-sea science is one of the important directions at the forefront of science, and deep-sea scientific research relies on technical means and equipment support. Manned submersibles, as a particularly important deep-diving equipment, can be used to perform underwater surveys, geological exploration, sample collection, pipeline maintenance, salvage and rescue tasks. When a manned submersible is operating, special retraction equipment is required to use a winch to deploy the manned submersible from the deck to the surface or recover it from the surface to the mother ship deck. When the winch is in the process of retracting and releasing the manned submersible, especially when the manned submersible is in mid-air, the equipment will be affected by the longitudinal and lateral shaking of the ship at sea, causing the manned submersible to swing back and forth, directly affecting the safety of the retraction and release operation, and even damaging the equipment. Therefore, it is necessary to improve the performance of the winch and improve the stability when deploying manned submersibles or other underwater detection equipment and instruments. Utility Model Content

[0003] Based on the above problems, the purpose of the utility model is to provide a winch emergency lowering and pressure compensation system to achieve the emergency lowering of the system load instrument and the pressure compensation function of the system oil circuit, thereby improving the operating safety and reliability of the retractable equipment.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

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

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

[0007] The winch assembly includes a power motor, a drum and a brake component. The drum is connected to the output end of the power motor. The brake component 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 the 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 regulating valve and a first stop valve. The first stop valve, the hydraulic control valve and the first speed regulating valve are connected in sequence, and the first stop valve and the first speed regulating valve are connected to the two chambers of the power motor correspondingly to form an emergency lowering circuit. The accumulator is connected to a 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. Control oil circuits that provide a control oil source for the brake assembly are provided on the working circuit and the compensation oil circuit, and a second stop valve is provided on the control oil circuit of the compensation oil circuit.

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

[0010] Optionally, a pressure reducing valve for limiting the output pressure of the reserve oil source in the accumulator is provided on the compensation oil circuit.

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

[0012] Optionally, a third stop valve connected in parallel with the first safety valve is provided on the pressure relief oil circuit.

[0013] Optionally, a first one-way 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, a pressure sensor for detecting the pressure in the accumulator and a pressure gauge for displaying the pressure in the accumulator are provided on the energy storage oil circuit.

[0015] Optionally, a second one-way valve is provided on the compensation oil circuit, which only allows the reserve oil source in the accumulator to flow to the two chambers of the power motor.

[0016] Optionally, a balancing valve is provided on the working circuit for maintaining 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 for relieving the pressure of the pressure oil source in the working circuit when the pressure is higher than a set value.

[0018] In summary, the beneficial effect of the utility model is that, 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 time after the retracting and releasing equipment loses power, so as to eliminate the safety hazards such as the impact of the load swinging in mid-air on the retracting and releasing equipment, thereby improving the safety of the entire retracting and releasing equipment; on the other hand, through the pressure compensation of the accumulator, the risk of hydraulic system suction that may be generated during the load lowering process can be effectively compensated, which not only ensures the reliable operation of the retracting and releasing equipment, but also protects the relevant hydraulic components, thereby improving the reliability and service life of the entire retracting and releasing equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate and understand the technical solutions in the embodiments of the present invention, the following briefly introduces the background technology of the present invention and the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0020] Figure 1It is a structural schematic diagram of a winch emergency lowering and pressure compensation system provided by an embodiment of the utility model.

[0021] In the figure:

[0022] 100. Directional valve;

[0023] 200, winch assembly; 201, power motor; 202, drum; 203, brake component; 204, working circuit; 205, balance valve; 206, second safety valve;

[0024] 300, brake assembly; 301, control oil circuit;

[0025] 400, emergency function component; 401, accumulator; 402, hydraulic control valve; 403, first speed regulating valve; 404, first stop valve; 405, emergency lowering circuit; 406, energy storage oil circuit; 407, compensation oil circuit; 408, second stop valve; 409, second speed regulating valve; 410, pressure reducing valve; 411, pressure relief oil circuit; 412, first safety valve; 413, third stop valve; 414, first non-return valve; 415, pressure sensor; 416, pressure gauge; 417, second non-return valve. DETAILED DESCRIPTION

[0026] In order to make the technical problems solved by the utility model, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the utility model will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0027] See also 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, so as 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 member 203. The drum 202 is connected to the output end of the power motor 201. The brake member 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 the B port of the reversing valve 100 to form a working circuit 204. The winch assembly 200 here is a common hydraulic retractable winch, which is used to complete the retractable function of the load (such as a submersible).

[0030] The brake assembly 300 reduces the pressure of the input pressure oil source into the control oil source required for braking, and the specific structure will not be described in detail here.

[0031] Among them, the emergency function component 400 includes an accumulator 401, a hydraulic control valve 402, a first speed regulating valve 403 and a first stop valve 404. The first stop valve 404, the hydraulic control valve 402 and the first speed regulating valve 403 are connected in sequence, and the first stop valve 404 and the first speed regulating valve 403 are connected to the two chambers of the power motor 201 correspondingly to form an emergency lowering circuit 405. The accumulator 401 is connected to a chamber of the power motor 201 through the energy storage oil circuit 406. The accumulator 401 is also connected to the two chambers of the power motor 201 through the compensation oil circuit 407. The working circuit 204 and the compensation oil circuit 407 are both provided with a control oil circuit 301 for providing a control oil source for the brake assembly 300, and a second stop valve 408 is provided on the control oil circuit 301 of the compensation oil circuit 407.

[0032] When the winch is in normal retractable operation, the pressure oil source enters the working circuit 204 to drive the power motor 201 to rotate forward and reversely to realize the function of retracting and releasing the load. At the same time, the winch assembly 200 provides the brake assembly 300 with a control oil source to realize the braking function. In addition, a part of the pressure oil source also charges the accumulator 401 through the energy storage oil circuit 406.

[0033] When the winch is in emergency lowering operation, there is no pressure oil source input, and the winch is subjected to the pulling force generated by the deadweight of the load, which drives the power motor 201 to rotate, and the reserve oil source of the accumulator 401 provides the brake assembly 300 with a control oil source to realize the braking function;

[0034] During emergency lowering 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, replenishing the power motor 201 with oil in real time to avoid the hydraulic system being sucked empty due to leakage of hydraulic parts such as the power motor 201 and pipelines.

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

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

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

[0038] Furthermore, a third stop valve 413 connected in parallel with the first safety valve 412 is provided on the pressure relief oil circuit 411 for draining oil from the accumulator 401 during equipment maintenance.

[0039] As an optional solution, the energy storage oil circuit 406 is provided with a first one-way valve 414 that only allows the pressure oil source in the working circuit 204 to flow to the accumulator 401 , thereby preventing the reserve oil source from reversely entering the working circuit 204 .

[0040] As an optional solution, 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 are provided on the energy storage oil circuit 406 to intuitively reflect the oil pressure of the accumulator 401. When it is detected that the pressure of the accumulator 401 is 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 on the winch for a certain distance.

[0041] As an optional solution, a second one-way valve 417 is provided on the compensation oil circuit 407 to only allow the reserve oil source in the accumulator 401 to flow to the two chambers of the power motor 201 , thereby preventing the pressure oil source from reversely entering the compensation oil circuit 407 .

[0042] As an optional solution, a balancing valve 205 is provided on the working circuit 204 for maintaining the pressure and flow balance of the pressure oil source in the working circuit 204 , thereby ensuring the stability of the oil pressure in the working circuit 204 .

[0043] As an optional solution, the working circuit 204 is provided with a second safety valve 206 for relieving the pressure of the pressure oil source in the working circuit 204 when the pressure is higher than a set value, so as to release the 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 modes can be combined in any combination, and the combined implementation modes all belong to the protection scope of the present utility model.

[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 through the left or right position function of the reversing valve 100, and the winch assembly 200 provides a control oil source to the brake assembly 300, which opens the brake member 203 in conjunction with the reversing valve 100, thereby realizing the normal retraction and extension operation of the winch. At this time, the first stop valve 404, the second stop valve 408 and the third stop valve 413 in the emergency function component 400 are all in a closed state. When the drum 202 is lifting normally, the hydraulic oil not only passes through the right position function of the reversing valve 100 and the balance valve 205 to reach the lifting port (left oil port) of the power motor 201, but also passes through the first check valve 414 to enter the accumulator 401, realizing the oil filling function of the accumulator 401.

[0047] When the winch is in emergency lowering operation, the reversing valve 100 is in the middle position, at which time the first stop valve 404 and the second stop valve 408 in the emergency function component 400 are opened, and the reserve oil source in the accumulator 401 provides the brake component 300 with a control oil source through the second speed regulating valve 409, the pressure reducing valve 410 and the second stop valve 408, thereby opening the brake member 203. At this time, the two chambers of the power motor 201 form an emergency lowering circuit 405 through the first stop valve 404, the hydraulic control valve 402 and the first speed regulating valve 403. Due to the tension generated by the deadweight of the load on the winch, the power motor 201 will be driven to rotate, and the first speed regulating valve 403 will adjust the rotation at a certain speed, thereby controlling the speed of the emergency lowering of the winch to avoid stalling, thus realizing the emergency lowering function of the winch.

[0048] When the winch is in emergency lowering operation, the reserve oil source in the accumulator 401 is connected through the second speed regulating valve 409, the pressure reducing valve 410 and the second one-way valve 417, and respectively enters the two chambers of the power motor 201, replenishing the power motor 201 with oil in real time, thereby avoiding the hydraulic system from being sucked empty due to leakage of hydraulic parts such as the power motor 201 and pipelines.

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

[0050] 1) The safety of the retractable equipment is improved, so that when the retractable 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) The reliability and service life of the retractable and unretractable equipment are improved. The pressure compensation of the accumulator 401 can effectively compensate for the risk of hydraulic system cavitation that may occur during the load lowering process, thereby ensuring the reliable operation of the system and protecting the relevant hydraulic components to avoid premature damage to the components due to cavitation.

[0052] 3) The first speed regulating valve 403 can effectively adjust the emergency lowering speed to make 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 the load stall caused by the loss of pressure. At the same time, the brake component 203 is also closed immediately, achieving double protection;

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

[0055] 6) The first one-way valve 414 and the accumulator 401 can absorb pressure shocks during normal operation of the system, thereby ensuring stable operation of the retractable and deployable device.

[0056] The above embodiments are only to illustrate the basic principles and characteristics of the utility model. The utility model is not limited by the above embodiments. Without departing from the spirit and scope of the utility model, the utility model has various changes and modifications, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A winch emergency lowering and pressure compensation system, characterized in that: The invention comprises 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) comprises a power motor (201), a drum (202) and a brake member (203); the drum (202) is connected to the output end of the power motor (201); the brake member (203) is controlled by the brake assembly (300) to brake the power motor (201); two chambers of the power motor (201) are respectively connected to the A port and the B port of the reversing valve (100) to form a working circuit (204); The emergency function component (400) comprises an accumulator (401), a hydraulic control valve (402), a first speed regulating valve (403) and a first stop valve (404); the first stop valve (404), the hydraulic control valve (402) and the first speed regulating valve (403) are connected in sequence, and the first stop valve (404) and the first speed regulating valve (403) are connected to two chambers of the power motor (201) to form an emergency lowering circuit (405); the accumulator (401) The accumulator (401) is connected to a cavity of the power motor (201) via an energy storage oil circuit (406), and is also connected to two cavities of the power motor (201) via a compensation oil circuit (407). The working circuit (204) and the compensation oil circuit (407) are both provided with a control oil circuit (301) for providing a control oil source for the brake assembly (300), and a second stop 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 provided with a second speed regulating valve (409) for regulating the output flow of the reserve 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 provided with a pressure reducing valve (410) for limiting the output pressure of the reserve 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 via a pressure relief oil circuit (411), and a first safety valve (412) is provided on the pressure relief oil circuit (411).

5. The winch emergency lowering and pressure compensation system according to claim 4, characterized in that: The pressure relief oil circuit (411) is provided with a third stop 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 provided with a first one-way 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 provided with a pressure sensor (415) for detecting the pressure in the energy accumulator (401) and a pressure gauge (416) for displaying the pressure in the energy accumulator (401).

8. The winch emergency lowering and pressure compensation system according to claim 1, characterized in that: The compensation oil circuit (407) is provided with a second one-way valve (417) which only allows the reserve oil source 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 provided with a second safety valve (206) for releasing the pressure of a pressure oil source in the working circuit (204) whose pressure is higher than a set value.

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