Hydraulic system suitable for catching euphausia superba

Abstract

The utility model discloses a hydraulic system suitable for catching euphausia superba, which comprises a main pressure oil pipeline P, a brake oil pipeline Br, an oil return pipeline T, a first oil drainage pipeline L0, a second oil drainage pipeline Lb, a flushing pipeline Hx, six groups of oil ways arranged in parallel, ten control devices respectively used for controlling operation of various winches, and a left and right trawl winch synchronous control valve group, the twelve main pump set assemblies are symmetrically arranged on the left side and the right side, the two control pump sets are symmetrically arranged on the left side and the right side, all oil ways are sequentially connected with an electric proportional reversing valve, a shuttle valve, a balance valve, a one-way valve, an electromagnetic reversing valve, an overflow valve and a hydraulic motor, through the modularized and integrated optimization design, the weight and the size of a product are reduced, and the light weight effect is achieved; installation and use are more convenient. A pipe hole of the valve block is optimized, and noise and vibration are reduced. Through the control operation of each control device, the efficient fishing operation of the euphausia superba can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of fishery fishing operations, in particular to a hydraulic system suitable for Antarctic krill fishing. Background Art

[0002] The most important technical problem for commercial fishing vessels to catch Antarctic krill is to prevent the long-term squeezing of Antarctic krill in the trawl net from causing the fluorine element in the shrimp shell to penetrate into the edible part. Traditional mid-water trawls need to control the trawl time and the net yield, and the general catch per net is controlled at around 10 tons. At the same time, because the low-temperature proteases such as trypsin, serine protease and carboxy protease in the Antarctic krill body will quickly decompose the dead Antarctic krill tissue, it will form an autolysis phenomenon and cause meat corruption. Therefore, Antarctic krill must be processed within 1 to 3 hours of hauling off the net.

[0003] In order to prevent Antarctic krill from staying in the net for a long time, ensuring the quality of Antarctic krill is the focus of Antarctic krill fishing technology. In the process of continuous fishing with mid-layer trawling, there is no need to lift the net. The krill in the net bag is directly pumped to the deck processing workshop using a krill pump and a delivery hose, so that the Antarctic krill can arrive at the processing workshop within a few minutes after being caught and wait for processing. The quality of the raw materials of Antarctic krill products is guaranteed, and pollution-free krill oil and other products can be produced. Compared with the traditional mid-layer trawling method of collecting the catch after lifting the net, the continuous fishing with mid-layer trawling can greatly simplify the operation process, and has the advantages of high efficiency, time saving and high catch quality, and has broad application prospects. The existing technology has high energy consumption and is easily dangerous when it is controlled manually in the double-net state of the double-truss trawling.

[0004] The utility model can help better realize the continuous pump-suction fishing of Antarctic krill, and can continuously trawle for a long time without collecting the nets for several weeks, with high fishing efficiency and good quality of krill caught. The double-net state of the double-truss trawl net is basically subjected to the same force through the use of a synchronous valve group and a constant tension valve, avoiding the occurrence of the danger of capsizing of the fishing boat due to large deviation of the force on both sides.

[0005] In view of the above, it is necessary to propose a hydraulic system suitable for Antarctic krill fishing to solve the above problems. Utility Model Content

[0006] The utility model aims to provide a hydraulic system suitable for Antarctic krill fishing, so that when a fishing boat uses a double-truss trawl with double nets, the forces on the double nets are basically the same, thereby avoiding the danger of capsizing of the fishing boat due to large force deviation on both sides; and to improve the reliability, safety and automation of the fishing system operation and reduce energy consumption.

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a hydraulic system suitable for Antarctic krill fishing, including two groups of hydraulic oil tanks arranged in the hull, multiple groups of port winch systems are arranged on the port side of the hull, and multiple groups of starboard winch systems are arranged on the starboard side of the hull, and the two groups of hydraulic oil tanks include a port hydraulic oil tank and a starboard hydraulic oil tank; the port hydraulic oil tank is connected to the port winch system through a port control oil pipe, and the starboard hydraulic oil tank is connected to the starboard winch system through a starboard control oil pipe, and the port control oil pipe and the starboard control oil pipe are independent of each other; a synchronous control valve group is arranged between the port winch system and the starboard winch system, and the synchronous control valve group controls the lifting and lowering oil holes of the winch motors in the port and starboard winch systems, and controls the port and starboard winch systems to achieve hydraulic synchronization.

[0008] Furthermore, multiple groups of the port winch systems and starboard winch systems are provided with hydraulic motor assemblies and electric proportional reversing valve assemblies. The port control oil pipe and the starboard control oil pipe are respectively connected to the inlet of the electric proportional reversing valve assembly in the corresponding winch system and provide controlled hydraulic oil thereto. The electric proportional reversing valve assembly controls the flow direction of the hydraulic oil entering the hydraulic motor assembly. A balancing valve group assembly is provided between the electric proportional reversing valve assembly and the hydraulic motor assembly. The output end of the electric proportional reversing valve assembly is connected to the input end of the balancing valve group assembly, and the output end of the balancing valve group assembly is connected to the hydraulic motor assembly. The balancing valve group assembly controls the output power of the hydraulic motor assembly by remotely or locally controlling the oil pressure and / or flow rate of the hydraulic oil supplied to the hydraulic motor assembly, so that the speed range of the hydraulic motor assembly is adjustable and the output power is stable.

[0009] Furthermore, the winch motors are provided with a lifting oil port and a lowering oil port, and the electric proportional reversing valve assembly controls the hydraulic oil to enter different lifting or lowering oil ports, controls the different directions of the hydraulic motor, and then changes the lifting or lowering control of the trawl by the winch. The lifting and lowering oil ports of the hydraulic motor on the port side are connected to the P2 and P1 ports of the synchronous control valve group, and the lifting and lowering oil ports of the hydraulic motor on the starboard side are connected to the C1 and C2 ports of the synchronous control valve group.

[0010] The synchronous control valve group includes a second shuttle valve, a second throttle valve, a fourth electromagnetic reversing valve, a first hydraulically controlled reversing valve, and an internal oil passage of the valve block; the P1, P2 and C1, C2 are respectively connected to the two sides of the first hydraulically controlled reversing valve through the internal oil passage of the valve block, and the action of the first hydraulically controlled reversing valve controls P1, P2 and C1, C2 to be disconnected from each other, or P1 is connected to C1, and P2 is connected to C2; the action of the first hydraulically controlled reversing valve is controlled by the fourth electromagnetic reversing valve, the armature power supply of the fourth electromagnetic reversing valve is controlled remotely or locally, the control hydraulic oil of the fourth electromagnetic reversing valve entering the first hydraulically controlled reversing valve is supplied by the oil pipe at the P1 or P2 end, the oil pipes of the P1 and P2 ports entering the synchronous control valve group are arranged in parallel, and a second shuttle valve is connected between the two oil pipes, the oil inlets at both ends of the second shuttle valve are connected to P1 and P2, and the outlet of the second shuttle valve is connected to the fourth electromagnetic reversing valve; a second throttle valve is arranged on the oil pipe from the outlet of the second shuttle valve to the first hydraulically controlled reversing valve.

[0011] Furthermore, the port control oil pipe and the starboard control oil pipe each include a main pressure oil pipeline P, a brake oil pipeline Br, an oil return pipeline T, a first oil drain pipeline L0, a second oil drain pipeline Lb, and a flushing pipeline Hx, six sets of oil pipelines arranged in parallel;

[0012] The electric proportional reversing valve assembly includes an inlet pressure compensator, a main proportional hydraulically controlled reversing valve, and an electric proportional controlled pilot pressure reducing valve; the main proportional hydraulically controlled reversing valve is a three-position valve, with a P port and a T port on its inlet side, and an A port and a B port on its outlet side. The main pressure oil pipeline P is connected to the P port through the inlet pressure compensator, and the return oil pipeline T is connected to the T port. The A port and the B port are connected to the inlet of the balancing valve group assembly. The change in the valve core position of the main proportional hydraulically controlled reversing valve changes the connection direction between the inlet side and the outlet side; both ends of the main proportional hydraulically controlled reversing valve are provided with electric proportional pilot pressure reducing valves to control its action.

[0013] Furthermore, the balancing valve group assembly includes a balancing valve, a fifth one-way valve, an oil port pressure sensor, and an electric proportional relief valve; the A port is connected to the oil inlet of the balancing valve, the B port is connected to the lowering oil inlet of the hydraulic motor via the control oil port of the balancing valve, the oil outlet of the balancing valve is connected to the lifting oil port of the hydraulic motor, the lifting direction oil port of the hydraulic motor is connected to the P port of the electric proportional relief valve, and the lowering direction oil inlet of the hydraulic motor is connected to the T port of the electric proportional relief valve. The overflow pressure is set and the corresponding winch is controlled to maintain the corresponding tension by remotely or locally issuing a control command to the electric proportional relief valve.

[0014] Furthermore, the balancing valve group assembly also includes a first shuttle valve and a second solenoid reversing valve; the inlets at both ends of the first shuttle valve are connected to the oil inlet of the balancing valve and the control oil port of the balancing valve, and the outlet of the first shuttle valve is connected to the inlet end of the second solenoid reversing valve. Through the gain and loss of electricity of the solenoid valve at the end of the second solenoid reversing valve, the pressure oil flows out from the first valve shuttle and enters the small displacement control port X of the hydraulic motor, so that the winch can obtain a higher speed and different torque by changing the displacement of the variable motor without changing the flow rate, and then combined with the adjustment of the operating handle, the speed required for the fishing process can be achieved.

[0015] Furthermore, the winch motor in each winch system is provided with a brake control component, which includes a sixth one-way valve, a first pressure reducing valve, a third solenoid reversing valve, a one-way speed regulating valve, and a spring-loaded normally closed brake cylinder. The oil inlet of the sixth one-way valve is connected to the brake oil pipeline Br, the oil outlet of the sixth one-way valve is connected to the P port of the third solenoid reversing valve through the first pressure reducing valve, and the B port of the third solenoid reversing valve is connected to the rodless chamber of the spring-loaded normally closed brake cylinder through the speed regulating valve; the braking function of the corresponding winch is realized through the electrical control of the solenoid reversing valve.

[0016] Furthermore, the port hydraulic oil tank and the starboard hydraulic oil tank are each equipped with six main pump groups, and the main pump groups are used to provide hydraulic oil circulation for the port control oil pipe and the starboard control oil pipe.

[0017] The cooling pump group, return oil filter, liquid level gauge and cooler are arranged symmetrically on the port and starboard sides. The inlet end of the cooling pump group is connected to the port and starboard hydraulic oil tanks, and the outlet end is connected to the return oil filter through the port and starboard control oil pipes. A cooler is provided at the front end of the return oil filter, and the rear end of the return oil filter is connected to the hydraulic oil tank. When all winches are in standby state, the cooling pump group plays a role of forced cooling circulation.

[0018] Furthermore, the port winch system includes a port hose winch, a port auxiliary winch, a Gilson winch, a port net winder, and a port trawl winch; the starboard winch system includes a starboard hose winch, a starboard auxiliary winch, a Gilson winch, a starboard net winder, and a starboard trawl winch.

[0019] Compared with the prior art, the utility model has the following beneficial effects: the utility model provides a hydraulic system for Antarctic krill boat fishing operations, which provides a safe, reliable and energy-saving hydraulic system for realizing continuous mid-layer trawling fishing operations of Antarctic krill, and since the pipe holes of the valve block are optimized, noise and vibration are reduced.

[0020] Two control pump groups arranged symmetrically on the port and starboard sides, two cooling pump groups arranged symmetrically on the port and starboard sides, various hydraulic accessories such as return oil filter, liquid level gauge, cooler, etc., each oil circuit is connected in sequence to the electric proportional reversing valve, special valve block, shuttle valve, balance valve, check valve, solenoid reversing valve, relief valve, variable hydraulic motor, all valve parts are installed on the special valve block through threaded connection, and through modular and integrated optimized design, the types, weight and volume of products are reduced, achieving a lightweight effect, and more convenient installation and use.

[0021] Overflow valves are installed on each hydraulic motor, hydraulic pump group, and reversing valve group to prevent the entire hydraulic system from damaging the equipment due to abnormal increase in hydraulic oil pressure during fishing operations. The PLC control system sets pressure sensors through the inlet and outlet ports of the hydraulic motor. If an abnormal pressure gauge appears, it will immediately stop working and alarm to find the cause of the abnormality to protect the safe and reliable operation of the equipment. The signals sent by the encoder installed on the winch body and the pressure sensor installed on the motor are compared, and the PLC will make a response strategy to ensure the safety of the ship while implementing fixed depth and positioning precision fishing, which can greatly improve fishing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of a hydraulic system suitable for Antarctic krill fishing according to the utility model;

[0023] Figure 2 This is a schematic diagram of a hydraulic system suitable for Antarctic krill fishing according to the utility model;

[0024] Figure 3 It is the schematic diagram of the hydraulic motor and hydraulic balance valve group assembly;

[0025] Figure 4 This is the schematic diagram of the electric proportional reversing valve assembly;

[0026] Figure 5 This is the principle diagram of the synchronous control valve group;

[0027] Figure 6 This is the schematic diagram of the brake assembly;

[0028] Figure 7 This is the schematic diagram of the hydraulic pump station;

[0029] In the figure: 1. Main pump group; 2. Control pump group; 3. Cooling pump group; 4. Cooler; 5. Return oil filter; 6. First check valve; 7. Liquid level switch; 8. Thermometer switch; 9. Filter; 10. Liquid level gauge;

[0030] 1.2, main pump body; 1.3, first special valve block; 1.4, first pressure sensor; 1.5, first overflow valve; 1.6, pressure gauge assembly; 1.7, first flexible joint; 1.8, oil suction filter; 1.9, manual butterfly valve; 1.10, first electromagnetic reversing valve; 1.11, first throttle valve; 1.12, second one-way valve;

[0031] 2.1, first butterfly valve; 2.2, second flexible joint; 2.3, control pump; 2.4, second overflow valve; 2.5, third one-way valve; 2.6, second pressure sensor; 2.7, first pressure measuring joint;

[0032] 3.1, second butterfly valve; 3.2, third flexible joint; 3.3, cooling pump body; 3.4, third overflow valve; 3.5, fourth check valve; 3.6, second pressure measuring joint;

[0033] 12.1, Port hose winch; 12.2, Starboard hose winch; 13.1, Port auxiliary winch; 13.2, Starboard auxiliary winch; 14, Gilson winch; 15.1, Port net winder; 15.2, Starboard net winder; 19.1, Port control oil pipe; 19.2, Starboard control oil pipe;

[0034] 16.21, Port side trawl winch; 16.22, Starboard side trawl winch; 16.1, Hydraulic motor; 16.2, Balance valve; 16.3, Fifth non-return valve; 16.4, Oil port pressure sensor; 16.5, Electric proportional relief valve; 16.7, First shuttle valve; 16.8, Second solenoid reversing valve; 16.10, Spring-loaded normally closed brake cylinder; 16.11, Non-return speed regulating valve; 16.12, Third solenoid reversing valve; 16.13, First pressure reducing valve; 16.14, Sixth non-return valve;

[0035] 17. Synchronous control valve group; 17.1. Second special valve block; 17.2. Second throttle valve; 17.3. Fourth solenoid reversing valve; 17.4. First hydraulic control reversing valve; 17.5. Second shuttle valve;

[0036] 18. Electric proportional reversing valve assembly; 18.1. Inlet pressure compensator; 18.2. Main proportional hydraulic reversing valve; 18.3. Electric proportional control pilot pressure reducing valve; 18.4. Fourth relief valve; 18.5. Quick pressure measuring joint; 18.6. Second pressure reducing valve; 18.7. Third shuttle valve; 18.8. Throttle plug; DETAILED DESCRIPTION

[0037] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0038] A hydraulic system suitable for Antarctic krill fishing, such as Figure 1 , 2 As shown, it includes a main pressure oil pipeline P, a brake oil pipeline Br, a return oil pipeline T, a first oil drain pipeline L0, a second oil drain pipeline Lb, a flushing pipeline Hx, six groups of oil circuits arranged in parallel, ten control devices for controlling the operation of various winches respectively, a control valve group for controlling the synchronization of the left and right trawl winches, twelve main pump group assemblies arranged symmetrically on the left and right, two control pump groups 2 arranged symmetrically on the left and right, two cooling pump groups 3 arranged symmetrically on the left and right, a return oil filter 5, a level gauge, a cooler and other hydraulic accessories, each oil circuit is connected in turn to an electric proportional reversing valve, a special valve block, a shuttle valve, a balance valve, a check valve, an electromagnetic reversing valve, a relief valve, a variable hydraulic motor, and all valves are installed on the special valve block through threaded connection. At the same time, through modularization and integrated optimization design, the types, weight and volume of the products are reduced, the lightweight effect is achieved, and the installation and use are more convenient.

[0039] The hydraulic system also includes ten hydraulic control devices for controlling the retraction and extension of the corresponding winches;

[0040] The hydraulic control device shown includes a hydraulic motor and a balance valve group assembly for winch retraction and extension, an electric proportional reversing valve assembly, and a brake control assembly.

[0041] The hydraulic motor and the balance valve assembly are as follows Figure 3 As shown, it includes a first shuttle valve 16.7, a balance valve 16.2, a fifth one-way valve 16.3, an oil port pressure sensor 16.4, an electric proportional relief valve 16.5, a second electromagnetic reversing valve 16.8, and a variable hydraulic motor 16.1.

[0042] The electric proportional reversing valve assembly 18, such as Figure 4 As shown, it includes an inlet pressure compensator 18.1, a main proportional hydraulic control reversing valve 18.2, an electric proportional control pilot pressure reducing valve 18.3, a fourth relief valve 18.4, a quick pressure measuring joint 18.5, a second pressure reducing valve 18.6, a third shuttle valve 18.7, and a throttle plug 18.8. The electric proportional reversing valve assembly includes an inlet pressure compensator, a main proportional hydraulic control reversing valve, and an electric proportional control pilot pressure reducing valve; the main proportional hydraulic control reversing valve is a three-position valve, with a P port and a T port on its inlet side, and an A port and a B port on its outlet side. The main pressure oil pipeline P is connected to the P port through the inlet pressure compensator, and the return oil pipeline T is connected to the T port. The A port and the B port are connected to the inlet of the balancing valve group assembly. The change in the valve core position of the main proportional hydraulic control reversing valve changes the connection direction between the inlet side and the outlet side; both ends of the main proportional hydraulic control reversing valve are provided with electric proportional pilot pressure reducing valves to control its action.

[0043] The brake control component, such as Figure 6As shown, it includes a sixth one-way valve 16.14, a first pressure reducing valve 16.13, a third electromagnetic reversing valve 16.12, a one-way speed regulating valve 16.11, and a spring-loaded normally closed brake oil cylinder 16.10. The oil inlet of the sixth one-way valve 16.14 is connected to the brake oil pipeline Br, the oil outlet of the sixth one-way valve 16.14 is connected to the P port of the third electromagnetic reversing valve 16.12 through the first pressure reducing valve 16.13, and the B port of the third electromagnetic reversing valve 16.12 is connected to the rodless chamber of the spring-loaded normally closed brake oil cylinder 16.10 through the speed regulating valve 16.11. The brake function of the corresponding winch is realized by the electrical control of the electromagnetic valve 16.12.

[0044] The hydraulic system suitable for Antarctic krill fishing, including a main pressure oil pipeline P, a brake oil pipeline Br, a return oil pipeline T, a first oil drain pipeline L0, a second oil drain pipeline Lb, and a flushing pipeline Hx, six groups of oil pipelines arranged in parallel, and ten control devices respectively used to control the operation of various winches, are described by taking the port trawl winch 16.21 as an example.

[0045] The pressure pipeline is connected to the inlet of the inlet pressure compensator 18.1 through the pressure pipeline P0 port of the main trawl winch system. The first oil port of the pressure compensator 18.1 and the second oil port of the pressure compensator 18.1 are respectively connected to the first oil port of the electric proportional reversing valve 18.2 and the oil outlet of the third shuttle valve 18.7. The return oil port of the electro-hydraulic proportional valve 18.2 returns to the oil cabinet after passing through the cooler 4, the return oil filter 5, and the first return oil check valve 6. The A port of the electro-hydraulic proportional valve 18.2 is connected to the oil inlet of the balancing valve 16.2, the B port of the electro-hydraulic proportional valve 18.2 is connected to the control oil port of the balancing valve 16.2 and the lowering oil inlet of the hydraulic motor 16.1, the oil outlet of the balancing valve 16.2 is connected to the lifting direction oil port of the hydraulic motor, at the same time, the lifting direction oil port of the hydraulic motor 16.1 is connected to the P port of the electric proportional relief valve 16.5, and the lowering direction oil inlet of the hydraulic motor 16.1 is connected to the T port of the electric proportional relief valve 16.5.

[0046] The hydraulic system suitable for Antarctic krill fishing includes a control valve group 17 for controlling the synchronization of the left and right trawl winches, such as Figure 5 As shown in the figure, the lifting and lowering oil ports of the hydraulic motor 16.1 of the port trawl winch 16 are respectively connected to the P2 and P1 ports of the synchronous control valve group 17, and the lifting and lowering oil ports of the starboard trawl winch 16 are respectively connected to the C1 and C2 ports of the synchronous control valve group 17. The second shuttle valve 17.5, the second throttle valve 17.2, the fourth electromagnetic reversing valve 17.3, and the first hydraulic control reversing valve 17.4 are installed on the second special valve block 17.1 through threads. The oil passage inside the valve block is as shown in the attached figure. Figure 5The principle shown is connected, and the synchronous control valve group includes a shuttle valve, a throttle valve, an electromagnetic reversing valve, a hydraulically controlled reversing valve, and an internal oil channel of the valve block; the P1, P2 and C1, C2 are respectively connected to the two sides of the hydraulically controlled reversing valve through the internal oil channel of the valve block, and the action of the hydraulically controlled reversing valve controls P1, P2 and C1, C2 to be disconnected from each other, or P1 is connected to C1, and P2 is connected to C2; the action of the hydraulically controlled reversing valve is controlled by the electromagnetic reversing valve, and the armature power supply of the electromagnetic reversing valve is controlled remotely or locally. The control hydraulic oil of the electromagnetic reversing valve entering the hydraulically controlled reversing valve is supplied by the oil pipe at the P1 or P2 end, and the oil pipes entering the synchronous control valve group from the P1 and P2 ports are arranged in parallel, and a shuttle valve is connected between the two oil pipes, and the oil inlets at both ends of the shuttle valve are connected to P1 and P2, and the outlet of the shuttle valve is connected to the electromagnetic reversing valve; a throttle valve is arranged on the oil pipe from the outlet of the shuttle valve to the hydraulically controlled reversing valve.

[0047] The hydraulic system suitable for Antarctic krill fishing is composed of twelve (various groups on the left and right sides are symmetrically arranged) main pump groups 1; as shown in the attached Figure 7 As shown, the oil port at one end of the manual butterfly valve 1.9 is connected to the oil cabinet, and the oil port at the other end is connected to the oil inlet of the oil suction filter 1.8. The oil outlet of the oil suction filter 1.8 is connected to the inlet of the first flexible joint 1.7. The outlet of the first flexible joint 1.7 is connected to the oil suction port S of the main pump body 1.2. The first special valve block 1.3 for the pump outlet is installed on the outlet B of the pump. The first overflow valve 1.5, the first electromagnetic reversing valve 1.10, the first throttle valve 1.11, the second one-way valve 1.12, the pressure gauge assembly 1.6, the first pressure sensor 1.4 are installed on the first special valve block 1.3 for the pump outlet in sequence. A flow channel connecting various valve components is processed on a special valve block 1.3. The outlet B of the main pump body 1.2 is connected to the pressure pipeline road P through the second one-way valve 1.12 to provide a hydraulic power source for various winches. At the same time, the outlet B of the main pump body 1.2 is connected to the oil inlet of the first overflow valve 1.5, and the oil outlet of the first overflow valve 1.5 is connected to the oil drain pipeline Lb. At the same time, the outlet B of the main pump body 1.2 is connected to the oil inlet of the solenoid valve 1.10 through the first throttle valve 1.11, and the oil outlet of the solenoid valve 1.10 is connected to the oil drain pipeline Lb. The main pump oil drain port L2 is directly connected to the oil tank after being connected to the oil drain pipeline L0.

[0048] The hydraulic system suitable for Antarctic krill fishing comprises two control pump groups 2 arranged symmetrically on the port and starboard sides, two cooling pump groups 3 arranged symmetrically on the port and starboard sides, a cooler 4, a return oil filter 5, a liquid level switch 7, a thermometer switch 8, a filter 9, a liquid level gauge 10, and other hydraulic accessories, which are installed on or beside the oil tank. The control pump group 2 comprises a first butterfly valve 2.1, a second flexible joint 2.2, a control pump 2.3, a second relief valve 2.4, a third one-way valve 2.5, a second pressure sensor 2.6, and a first pressure measuring joint 2.7. The hydraulic oil is connected to the oil suction port of the control pump group 2.3 through the first butterfly valve 2.1 and the second flexible joint 2.2. The control pump group 2.3 generates pressure oil driven by the motor, and enters the brake control oil pipeline Br from the B port through the third one-way valve 2.5 to provide power for the brake oil cylinder. At the same time, the B port of the control pump group 2.3 is connected to the oil drain pipeline L0 after passing through the second relief valve 2.4.

[0049] The cooling pump group 3 includes a second butterfly valve 3.1, a third flexible joint 3.2, a cooling pump 3.3, a third overflow valve 3.4, a fourth check valve 3.5, and a second pressure measuring joint 3.6. The hydraulic oil is connected to the oil suction port of the cooling pump group 3.3 through the second butterfly valve 3.1 and the third flexible joint 3.2. The control pump group cooling pump 3.3 generates pressure oil driven by the motor, and reaches the return oil pipe T from the B port through the fourth check valve 3.5, and then passes through the first check valve 6, the cooler 4, and the return oil filter 5 to the oil tank. It plays the role of cooling the oil. This design can play a forced cooling role through the cooling pump group when all winches are in standby state.

[0050] The hydraulic system is composed of a constant power + constant pressure variable pump power system + a pressure compensation proportional speed control valve + a variable motor. This system combination can make the pump output the flow required by the motor, reducing the loss of hydraulic throttling, and the system has higher efficiency, less heat, and a wider speed range.

[0051] The control method of the hydraulic system is divided into remote centralized control and machine-side control. At the same time, the main towing winch 16 also has electric proportional variable tension control and left and right towing winch synchronous control.

[0052] The hydraulic system is remotely centralized and controlled by the machine. The hydraulic system controls the current of one of the electric proportional pressure reducing valves 18.3 in the electric proportional reversing valve assembly 18 by operating the control handle of the remote control console or the control handle of the machine-side console to drive the valve core of the main electro-hydraulic reversing valve 18.2, so that the pressure oil passes through the inlet pressure compensator 18.1 from the pressure pipe P and then outputs the pressure oil through the main reversing valve and then passes through the balance valve assembly 16.2 to enter the inlet and outlet oil ports of the variable hydraulic motor to rotate the variable hydraulic motor, thereby driving the corresponding winch to rotate and realize the fishing operation function. Through the gain and loss of electricity of the solenoid valve 16.8, the pressure oil flows out from the valve shuttle 16.7 and enters the small displacement control port X of the hydraulic motor 16.1, so that the winch can obtain a higher speed and different torque by changing the displacement of the variable motor 16.1 without changing the flow rate, and then combined with the adjustment of the operating handle, the speed required for the fishing process is realized. The gear-shifting stepless speed regulation function is realized, and the lifting, lowering and speed-changing functions of the winch can be realized by the operating handle.

[0053] The electric proportional variable tension control function is realized by operating the remote or local tension control knob, and the signal is transmitted through the PLC and then the corresponding command is issued to one of the electric proportional pressure reducing valves 18.3, and the corresponding command is issued to the overflow pressure of the electric proportional overflow valve 16.5, so that the corresponding winch 16 maintains the corresponding tension, thereby avoiding the risk of cable damage caused by excessive towing cable tension on the winch, and also preventing the risk of towing cable entanglement caused by insufficient towing cable tension. This function can improve the reliability and safety of the entire trawling system, while reducing the labor intensity of fishermen.

[0054] Synchronous control of port and starboard towing winches

[0055] During the stern trawling operation, by operating the synchronous control button on the remote control console, the fourth electromagnetic reversing valve 17.3 on the synchronous valve can be energized, so that the lifting and lowering oil ports of the port trawling winch 16 are connected to the P1 and P2 ports of the synchronous control valve group 17 respectively, and the lifting and lowering oil ports of the starboard trawling winch 16 are connected to the C1 and C2 ports of the synchronous control valve group 17 respectively, so that the oil inlet and outlet pressures of the port and starboard trawling winches 16 are the same through the two winch motors, so that the port and starboard trawling winches 16 are hydraulically synchronized, avoiding the large difference in tension of the two towing cables at the trawling net mouth and the reduction of the net mouth opening, resulting in reduced fishing efficiency, and at the same time avoiding the risk of the ship capsizing due to uneven force on the port and starboard sides.

[0056] Safety protection control: overflow valves are installed on each hydraulic motor, hydraulic pump group, and reversing valve group, so that the entire hydraulic system will not damage the equipment due to abnormal increase in hydraulic oil pressure during fishing operations. The PLC control system sets pressure sensors through the inlet and outlet of the hydraulic motor. If an abnormal pressure gauge appears, it will immediately stop working and alarm to find the cause of the abnormality to protect the safe and reliable operation of the equipment. The signals sent by the encoder installed on the winch body and the pressure sensor installed on the motor are compared, and the PLC will make a response strategy to ensure the safety of the ship while implementing fixed depth and positioning precision fishing, which can greatly improve fishing efficiency.

[0057] There is no example of the application of existing domestic hydraulic system technology in the mid-layer trawling continuous fishing operation of Antarctic krill. The beneficial effects of the utility model are as follows: the utility model provides a hydraulic system for Antarctic krill boat fishing operations, which provides a safe, reliable and energy-saving hydraulic system for realizing the mid-layer trawling continuous fishing operation of Antarctic krill. Since the pipe holes of the valve block are optimized, noise and vibration are reduced.

[0058] The above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed by the present invention according to the technical solution and inventive concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A hydraulic system suitable for Antarctic krill fishing, characterized in that: The invention comprises two groups of hydraulic oil tanks arranged in the hull, a plurality of groups of port winch systems are arranged on the port side of the hull, and a plurality of groups of starboard winch systems are arranged on the starboard side of the hull, and the two groups of hydraulic oil tanks include a port hydraulic oil tank and a starboard hydraulic oil tank; the port hydraulic oil tank is connected to the port winch system through a port control oil pipe, and the starboard hydraulic oil tank is connected to the starboard winch system through a starboard control oil pipe, and the port control oil pipe and the starboard control oil pipe are independent of each other; a synchronous control valve group is arranged between the port winch system and the starboard winch system, and the synchronous control valve group controls the opening and closing of the lifting and lowering oil holes of the winch motors in the port and starboard winch systems, and controls the port and starboard winch systems to achieve hydraulic synchronization.

2. A hydraulic system suitable for Antarctic krill fishing according to claim 1, characterized in that: A plurality of groups of the port winch systems and the starboard winch systems are provided with hydraulic motor assemblies and electric proportional reversing valve assemblies. The port control oil pipe and the starboard control oil pipe are respectively connected to the inlet of the electric proportional reversing valve assembly in the corresponding winch system and provide control hydraulic oil thereto. The electric proportional reversing valve assembly controls the flow direction of the hydraulic oil entering the hydraulic motor assembly. A balancing valve group assembly is provided between the electric proportional reversing valve assembly and the hydraulic motor assembly. The output end of the electric proportional reversing valve assembly is connected to the input end of the balancing valve group assembly, and the output end of the balancing valve group assembly is connected to the hydraulic motor assembly. The balancing valve group assembly controls the output power of the hydraulic motor assembly by remotely or locally controlling the oil pressure and / or flow of the hydraulic oil supplied to the hydraulic motor assembly, so that the speed range of the hydraulic motor assembly is adjustable and the output power is stable.

3. A hydraulic system suitable for Antarctic krill fishing according to claim 1, characterized in that: The winch motors are all provided with a lifting oil port and a lowering oil port. The electric proportional reversing valve assembly controls the hydraulic oil to enter different lifting or lowering oil ports to control the different directions of the hydraulic motor, thereby changing the lifting or lowering control of the trawl by the winch. The lifting and lowering oil ports of the hydraulic motor on the port side are connected to the P2 and P1 ports of the synchronous control valve group, and the lifting and lowering oil ports of the hydraulic motor on the starboard side are connected to the C1 and C2 ports of the synchronous control valve group. The synchronous control valve group includes a second shuttle valve, a second throttle valve, a fourth electromagnetic reversing valve, a first hydraulically controlled reversing valve, and an internal oil passage of the valve block; the P1, P2 and C1, C2 are respectively connected to the two sides of the first hydraulically controlled reversing valve through the internal oil passage of the valve block, and the action of the first hydraulically controlled reversing valve controls P1, P2 and C1, C2 to be disconnected from each other, or P1 is connected to C1, and P2 is connected to C2; the action of the first hydraulically controlled reversing valve is controlled by the fourth electromagnetic reversing valve, the armature power supply of the fourth electromagnetic reversing valve is controlled remotely or locally, the control hydraulic oil of the fourth electromagnetic reversing valve entering the first hydraulically controlled reversing valve is supplied by the oil pipe at the P1 or P2 end, the oil pipes of the P1 and P2 ports entering the synchronous control valve group are arranged in parallel, and a second shuttle valve is connected between the two oil pipes, the oil inlets at both ends of the second shuttle valve are connected to P1 and P2, and the outlet of the second shuttle valve is connected to the fourth electromagnetic reversing valve; a second throttle valve is arranged on the oil pipe from the outlet of the second shuttle valve to the first hydraulically controlled reversing valve.

4. A hydraulic system suitable for Antarctic krill fishing according to claim 2, characterized in that: The port side control oil pipe and the starboard side control oil pipe each include a main pressure oil pipeline P, a brake oil pipeline Br, an oil return pipeline T, a first oil drain pipeline L0, a second oil drain pipeline Lb, and a flushing pipeline Hx, six sets of oil pipelines arranged in parallel; The electric proportional reversing valve assembly includes an inlet pressure compensator, a main proportional hydraulically controlled reversing valve, and an electric proportional controlled pilot pressure reducing valve; the main proportional hydraulically controlled reversing valve is a three-position valve, with a P port and a T port on its inlet side, and an A port and a B port on its outlet side. The main pressure oil pipeline P is connected to the P port through the inlet pressure compensator, and the return oil pipeline T is connected to the T port. The A port and the B port are connected to the inlet of the balancing valve group assembly. The change in the valve core position of the main proportional hydraulically controlled reversing valve changes the connection direction between the inlet side and the outlet side; both ends of the main proportional hydraulically controlled reversing valve are provided with electric proportional pilot pressure reducing valves to control its action.

5. A hydraulic system suitable for Antarctic krill fishing according to claim 4, characterized in that: The balancing valve group assembly includes a balancing valve, a fifth one-way valve, an oil port pressure sensor, and an electric proportional relief valve; the A port is connected to the oil inlet of the balancing valve, the B port is connected to the lowering oil inlet of the hydraulic motor via the control oil port of the balancing valve, the oil outlet of the balancing valve is connected to the lifting oil port of the hydraulic motor, the lifting direction oil port of the hydraulic motor is connected to the P port of the electric proportional relief valve, and the lowering direction oil inlet of the hydraulic motor is connected to the T port of the electric proportional relief valve. The overflow pressure is set and the corresponding winch is controlled to maintain the corresponding tension by issuing a control command to the electric proportional relief valve remotely or locally.

6. A hydraulic system suitable for Antarctic krill fishing according to claim 5, characterized in that: The balancing valve group assembly also includes a first shuttle valve and a second solenoid reversing valve; the inlets at both ends of the first shuttle valve are connected to the oil inlet of the balancing valve and the control oil port of the balancing valve, and the outlet of the first shuttle valve is connected to the inlet end of the second solenoid reversing valve. Through the gain and loss of electricity of the solenoid valve at the end of the second solenoid reversing valve, the pressure oil flows out of the first valve shuttle and enters the small displacement control port X of the hydraulic motor, so that the winch can obtain a higher speed and different torque by changing the displacement of the variable motor without changing the flow rate, and then combined with the adjustment of the operating handle, the speed required for the fishing process is achieved.

7. A hydraulic system suitable for Antarctic krill fishing according to claim 1, characterized in that: The winch motor in each winch system is equipped with a brake control component, which includes a sixth one-way valve, a first pressure reducing valve, a third solenoid reversing valve, a one-way speed regulating valve, and a spring-loaded normally closed brake cylinder. The oil inlet of the sixth one-way valve is connected to the brake oil pipeline Br, the oil outlet of the sixth one-way valve is connected to the P port of the third solenoid reversing valve through the first pressure reducing valve, and the B port of the third solenoid reversing valve is connected to the rodless chamber of the spring-loaded normally closed brake cylinder through the speed regulating valve; the braking function of the corresponding winch is realized through the electrical control of the solenoid reversing valve.

8. A hydraulic system suitable for Antarctic krill fishing according to claim 1, characterized in that: The port hydraulic oil tank and the starboard hydraulic oil tank are each equipped with six main pump groups, which are used to provide hydraulic oil circulation for the port control oil pipe and the starboard control oil pipe. The cooling pump group, return oil filter, liquid level gauge and cooler are arranged symmetrically on the port and starboard sides. The inlet end of the cooling pump group is connected to the port and starboard hydraulic oil tanks, and the outlet end is connected to the return oil filter through the port and starboard control oil pipes. A cooler is provided at the front end of the return oil filter, and the rear end of the return oil filter is connected to the hydraulic oil tank. When all winches are in standby state, the cooling pump group plays a role of forced cooling circulation.

9. A hydraulic system suitable for Antarctic krill fishing according to claim 1, characterized in that: The port winch system includes a port hose winch, a port auxiliary winch, a Gilson winch, a port net winder, and a port trawl winch; the starboard winch system includes a starboard hose winch, a starboard auxiliary winch, a Gilson winch, a starboard net winder, and a starboard trawl winch.

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