Hydraulic system applicable to single-blade spreader

Abstract

The present invention relates to the technical field of wind power generation, and provides a hydraulic system applicable to a single-blade spreader, which includes a housing and a fuel tank assembly, an oil supply motor pump unit, an emergency oil supply motor pump unit, a main control valve group, a reversing valve group, a turning gear balance valve group, a tip clamping balance valve group, a root clamping balance valve group, an accumulator installation valve group, and a terminal box group arranged inside the housing. The turning gear balance valve group controls the turning gear oil cylinder of the offshore spreader, the tip clamping balance valve group controls the tip clamping oil cylinder of the offshore spreader, and the root clamping balance valve group controls the root clamping oil cylinder of the offshore spreader system. The hydraulic system of the present invention can work for a long time in a harsh environment, has high reliability, and can provide safer and more stable power, and is easy to operate and maintain.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, and in particular, to a hydraulic system applicable to a single-blade spreader, and more particularly to a hydraulic system applicable to an offshore clamp-type single-blade spreader. Background Art

[0002] With the increasing global demand for wind power generation, offshore wind power, as one of the energy sources, has developed rapidly.

[0003] The scale of offshore wind farms is constantly expanding, and the size and weight of wind turbine blades are also increasing. Due to the long size specifications and irregular shapes of wind turbine blades, it is difficult to transfer and transport them as well as perform hoisting and construction operations. Therefore, achieving stable and reliable transportation, construction, and installation of wind turbine blades has become a key research area in the wind power industry.

[0004] Existing blade spreaders can only perform some simple operations. The traditional rope spreader has a relatively simple structure, but it is easy to damage the blade due to excessive local stress, and it is difficult to accurately control the attitude of the blade, resulting in poor stability in complex environments. The mechanical clamp spreader fixes the blade through the clamping arms of the mechanical structure, with a certain degree of self-adaptive adjustment and relatively uniform clamping force, which can better protect the blade. However, it requires a safer and more stable power system to support it. Therefore, there is an urgent need to design a power system that can work for a long time in harsh environments, with high reliability, higher safety, and better stability to solve the deficiencies of the existing technology. Summary of the Invention

[0005] Aiming at the deficiencies in the prior art, the purpose of the present invention is to provide a hydraulic system applicable to a single-blade spreader.

[0006] According to the present invention, a hydraulic system applicable to a single-blade spreader includes a fuel tank assembly, a supply oil motor pump set, an emergency supply oil motor pump set, a main control valve group, a reversing valve group, a barring balance valve group, a tip clamping balance valve group, a root clamping balance valve group, an accumulator installation valve group, a terminal box group, and a housing.

[0007] The interior of the housing has an accommodation space, and the fuel tank assembly, the supply oil motor pump set, the emergency supply oil motor pump set, the main control valve group, the reversing valve group, the barring balance valve group, the tip clamping balance valve group, the root clamping balance valve group, the accumulator installation valve group, and the terminal box group are all arranged in the accommodation space.

[0008] Preferably, the fuel tank assembly includes a fuel tank, an air filter, an air cooler, a float-type liquid level sensor arranged inside the fuel tank, a temperature sensor, and a liquid level gauge and a heater arranged on the side wall of the fuel tank.

[0009] The air filter is arranged on the top of the fuel tank, and the air cooler is arranged above the fuel tank. The air cooler is used to cool down the hydraulic oil returning to the fuel tank.

[0010] Preferably, the oil supply motor pump set includes a first motor, a first gear pump, and a first coupling assembly. The first motor is drivingly connected to the first gear pump through the first coupling assembly. The inlet of the first gear pump is connected to the fuel tank assembly, and the outlet of the first gear pump is connected to the main control valve group through a first oil pipe.

[0011] The emergency oil supply motor pump set includes a second motor, a second gear pump, and a second coupling assembly. The second motor is drivingly connected to the second gear pump through the second coupling assembly. The inlet of the second gear pump is connected to the fuel tank assembly, and the outlet of the second gear pump is connected to the main control valve group through a third oil pipe.

[0012] Preferably, the main control valve group includes a first pressure sensor, a first pressure gauge, a second pressure sensor, a second pressure gauge, a first filter, a second filter, a first filter assembly, a second filter assembly, a third filter assembly, a first check valve, a second check valve, a third check valve, a first reversing valve, a second reversing valve, a first stop valve, a first relief valve, a second relief valve, a third relief valve, a high-pressure ball valve, and a first accumulator;

[0013] The first filter is arranged on the first oil pipe, with its inlet connected to the first check valve and its outlet connected to the second check valve. The first filter assembly, the second filter assembly, and the third filter assembly are arranged in parallel.

[0014] The front ends of the first filter assembly, the second filter assembly, and the third filter assembly are connected to the oil supply motor pump set through a first oil pipe and to the emergency oil supply motor pump set through a second oil pipe. The rear ends are connected to a seventh oil pipe. A third check valve is arranged on the seventh oil pipe. The end of the seventh oil pipe is sequentially connected to the high-pressure ball valve and the first accumulator. The first accumulator is located at the outlet of the second check valve;

[0015] The second oil pipe is a return oil pipeline. The second oil pipe is connected to the inlet of the first filter through a first relief valve and to the outlet of the first filter through a first reversing valve. The third oil pipe is connected to the second oil pipe through a sixth oil pipe. A second reversing valve and a third relief valve arranged in parallel are arranged in parallel on the sixth oil pipe. The two ends of the second filter are respectively connected to the air cooler and the fuel tank assembly. The air cooler is arranged on the second oil pipe.

[0016] Preferably, the main control valve group is connected to the reversing valve group through an eighth oil pipe. The reversing valve group includes a first sub-valve group, a second sub-valve group, and a third sub-valve group. The first sub-valve group, the second sub-valve group, and the third sub-valve group are arranged in parallel and their oil inlets are all connected to the eighth oil pipe. The oil outlet of the first sub-valve group is connected to the turning gear balance valve group through oil outlets A1 and B1. The oil outlet of the second sub-valve group is connected to the blade tip clamping balance valve group through oil outlets A2 and B2. The oil outlet of the third sub-valve group is connected to the blade root clamping balance valve group through oil outlets A3 and B3. The first sub-valve group, the second sub-valve group, and the third sub-valve group are all connected to the second oil pipe through a fifth oil pipe;

[0017] The working oil ports A1, A2, A3, B1, B2, and B3 concentrate all the oil ports on the turning gear balance valve group, the blade tip clamping balance valve group, and the blade root clamping balance valve group at the same position and the interface structures are the same.

[0018] Preferably, the first sub-valve group includes a fourth one-way valve, a third electromagnetic reversing valve, a first hydraulic control one-way valve, and a first one-way throttle valve. The oil fluid coming from the eighth oil pipe enters the first hydraulic control one-way valve and the first one-way throttle valve in sequence through the third electromagnetic reversing valve. The hydraulic oil passing through the third electromagnetic reversing valve can also change direction and flow away through the fourth one-way valve;

[0019] The second sub-valve group includes a fifth one-way valve, a first pressure reducing valve, a fourth electromagnetic reversing valve, a second hydraulic control one-way valve, and a second one-way throttle valve. The oil fluid coming from the eighth oil pipe enters the fourth electromagnetic reversing valve, the second hydraulic control one-way valve, and the second one-way throttle valve in sequence through the first pressure reducing valve. The hydraulic oil passing through the fourth electromagnetic reversing valve can also change direction and flow away through the fifth one-way valve;

[0020] The third sub-valve group includes a sixth one-way valve, a fifth electromagnetic reversing valve, a third hydraulic control one-way valve, a third one-way throttle valve, and a second pressure reducing valve. The oil fluid coming from the eighth oil pipe enters the fifth electromagnetic reversing valve, the third hydraulic control one-way valve, and the third one-way throttle valve in sequence through the second pressure reducing valve. The hydraulic oil passing through the fifth electromagnetic reversing valve can also change direction and flow away through the sixth one-way valve.

[0021] The reversing valve group further includes a seventh one-way valve. The oil fluid coming from the eighth oil pipe can also directly enter the blade tip clamping balance valve group or the blade root clamping balance valve group through the seventh one-way valve.

[0022] Preferably, the terminal box group connects all the wire harnesses of the electrical components on the main control valve group, the reversing valve group, the turning gear balance valve group, the blade tip clamping balance valve group, and the blade root clamping balance valve group to the terminals in the terminal box as the external electrical interface of the hydraulic system. All the wire harness shielding layers are connected to the terminal box;

[0023] It further includes a DC motor pump group as a standby motor pump group. The two ends of the DC motor pump group are respectively communicated with the fuel tank assembly and the main control valve group.

[0024] Preferably, the barring balance valve group includes a third pressure sensor, a fourth pressure sensor, a first balance valve, and a second balance valve;

[0025] Both ends of the first balance valve and the second balance valve are respectively communicated with the oil outlet A1 and B1 of the reversing valve group and the oil inlet of the barring oil cylinder, and the third pressure sensor and the fourth pressure sensor are respectively arranged at the outlets of the first balance valve and the second balance valve.

[0026] Preferably, the tip clamping balance valve group includes a fifth pressure sensor, a sixth pressure sensor, a third balance valve, a fourth balance valve, a sixth electromagnetic reversing valve, a seventh electromagnetic reversing valve, and a fourth accumulator;

[0027] Both ends of the third balance valve and the fourth balance valve are respectively communicated with the oil outlet A2 and B2 of the reversing valve group and the oil inlet of the tip clamping oil cylinder, the sixth electromagnetic reversing valve, the fifth pressure sensor, and the fourth accumulator are all arranged at the outlet of the third balance valve, and the seventh electromagnetic reversing valve and the sixth pressure sensor are both arranged at the outlet of the fourth balance valve;

[0028] The accumulator installation valve group is connected through the sixth electromagnetic reversing valve.

[0029] Preferably, the root clamping balance valve group includes a seventh pressure sensor, an eighth pressure sensor, a fifth balance valve, a sixth balance valve, an eighth electromagnetic reversing valve, a ninth electromagnetic reversing valve, and a fifth accumulator;

[0030] Both ends of the fifth balance valve and the sixth balance valve are respectively communicated with the oil outlet A3 and B3 of the reversing valve group and the oil inlet of the root clamping oil cylinder, the eighth electromagnetic reversing valve, the seventh pressure sensor, and the fifth accumulator are all arranged at the outlet of the fifth balance valve, and the ninth electromagnetic reversing valve and the eighth pressure sensor are both arranged at the outlet of the sixth balance valve;

[0031] The accumulator installation valve group is connected through the eighth electromagnetic reversing valve.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] The present invention integrates the barring balance valve group, the tip clamping balance valve group, and the root clamping balance valve group into a set of systems, and through the cooperation of the oil tank assembly, the oil supply motor pump group, the emergency oil supply motor pump group, the main control valve group, the reversing valve group, and the accumulator installation valve group, the barring actuator, the tip clamping actuator, and the root clamping actuator can complete actions more accurately, conveniently, and stably, and can work for a long time in a harsh environment, and can provide safer and more stable power, and has the characteristics of easy operation and maintenance, greatly improving the reliability and stability of the system. Brief Description of the Drawings

[0034] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non - limiting embodiments read in conjunction with the accompanying drawings:

[0035] Figure 1 Schematic perspective view of a hydraulic system applicable to a single - blade sling

[0036] Figure 2 Schematic perspective view of the hydraulic system applicable to a single - blade sling after removing the housing

[0037] Figure 3 Schematic front view of the hydraulic system applicable to a single - blade sling

[0038] Figure 4 Schematic view of the main control valve group of the hydraulic system applicable to a single - blade sling

[0039] Figure 5 Schematic view of the reversing valve group of the hydraulic system applicable to a single - blade sling

[0040] Figure 6 Schematic view of the structure of the barring balance valve group;

[0041] Figure 7 Schematic view of the structure of the blade - root clamping balance valve group;

[0042] Figure 8 Schematic view of the principle of the hydraulic system applicable to a single - blade sling when in use, where some components are omitted.

[0043] The figures show:

[0044] The first oil pipe 001;

[0045] The second oil pipe 002;

[0046] The third oil pipe 003;

[0047] The fourth oil pipe 004;

[0048] The fifth oil pipe 005;

[0049] The sixth oil pipe 006;

[0050] The seventh oil pipe 007;

[0051] The eighth oil pipe 008;

[0052] The terminal box group 30;

[0053] The fuel tank assembly 101;

[0054] The fuel tank 1;

[0055] Liquid level gauge 2;

[0056] Air filter 3;

[0057] Observation window 7;

[0058] Air cooler 9;

[0059] Float type liquid level sensor 10;

[0060] Temperature sensor 11;

[0061] Heater 12;

[0062] Oil supply motor pump unit 102;

[0063] First motor 5;

[0064] First gear pump 6;

[0065] First coupling assembly 37;

[0066] Emergency oil supply motor pump unit 103;

[0067] Second motor 25;

[0068] Second gear pump 38;

[0069] Second coupling assembly 39;

[0070] Main control valve group 104;

[0071] First filter 15;

[0072] First reversing valve 16;

[0073] Second reversing valve 18;

[0074] First stop valve 19;

[0075] High pressure ball valve 24;

[0076] Second filter 40;

[0077] First filter assembly 41;

[0078] Second filter assembly 42;

[0079] Third filter assembly 43;

[0080] First check valve 141;

[0081] ]Second check valve 142;

[0082] Third check valve 143;

[0083] First relief valve 171;

[0084] Second overflow valve 172;

[0085] Third overflow valve 173;

[0086] First pressure sensor 201;

[0087] Second pressure sensor 202;

[0088] First pressure gauge 211;

[0089] Second pressure gauge 212;

[0090] First accumulator 231;

[0091] Directional valve group 105;

[0092] Fourth check valve 144;

[0093] Fifth check valve 145;

[0094] Sixth check valve 146;

[0095] Third solenoid directional valve 261;

[0096] Fourth solenoid directional valve 262;

[0097] Fifth solenoid directional valve 263;

[0098] First pilot-operated check valve 271;

[0099] Second pilot-operated check valve 272;

[0100] Third pilot-operated check valve 273;

[0101] First one-way throttle valve 281;

[0102] Second one-way throttle valve 282;

[0103] Third one-way throttle valve 283;

[0104] First pressure reducing valve 291;

[0105] And second pressure reducing valve 292;

[0106] Turning bar balancing valve group 106;

[0107] Third pressure sensor 203;

[0108] Fourth pressure sensor 204;

[0109] First balance valve 311;

[0110] Second balance valve 312;

[0111] Tip clamping balance valve group 107;

[0112] The fifth pressure sensor 205;

[0113] The sixth pressure sensor 206;

[0114] The third balance valve 313;

[0115] The fourth balance valve 314;

[0116] The sixth electromagnetic directional valve 321;

[0117] The seventh electromagnetic directional valve 322;

[0118] The fourth accumulator 341;

[0119] The blade root clamping balance valve group 108;

[0120] The seventh pressure sensor 207;

[0121] The eighth pressure sensor 208;

[0122] The fifth balance valve 315;

[0123] The sixth balance valve 316;

[0124] The eighth electromagnetic directional valve 323;

[0125] The ninth electromagnetic directional valve 324;

[0126] The fifth accumulator 342;

[0127] The accumulator installation valve group 109;

[0128] The housing 110. Detailed implementation manners

[0129] The present invention will be described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several changes and improvements can still be made. These all fall within the protection scope of the present invention.

[0130] As Figures 1 to 8As shown in the figure, the present invention provides a hydraulic system applicable to a single-blade spreader, which includes an oil tank assembly 101, a supply oil motor pump set 102, an emergency supply oil motor pump set 103, a main control valve group 104, a reversing valve group 105, a barring balance valve group 106, a tip clamping balance valve group 107, a root clamping balance valve group 108, an accumulator installation valve group 109, a terminal box group 30, and a housing 110. The interior of the housing 110 has an accommodation space, and the oil tank assembly 101, the supply oil motor pump set 102, the emergency supply oil motor pump set 103, the main control valve group 104, the reversing valve group 105, the barring balance valve group 106, the tip clamping balance valve group 107, the root clamping balance valve group 108, the accumulator installation valve group 109, and the terminal box group 30 are all arranged in the accommodation space. A housing 110 is provided outside the entire hydraulic system in the present invention to protect the components inside the hydraulic system and ensure the safety and stability of the hydraulic system in a harsh environment.

[0131] As Figure 2 , Figure 8 shown in the figure, the oil tank assembly 101 is used to store the working medium hydraulic oil of the hydraulic unit and can also be used to collect the hydraulic oil flowing out during disassembly, installation, and maintenance. The oil tank assembly 101 includes an oil tank 1, a liquid level gauge 2 arranged on the side wall of the oil tank 1, an air filter 3, an air cooler 9, a float-type liquid level sensor 10 arranged inside the oil tank 1, a temperature sensor 11, a heater 12, and an observation window 7 arranged on the top of the oil tank 1. The liquid level gauge 2 is communicated with the inside of the oil tank 1, and on-site workers can directly see the height of the oil in the oil tank 1 through the liquid level gauge 2. The float-type liquid level sensor 10 can detect the liquid level of the oil tank 1 to achieve remote monitoring and improve the safety and stability of the hydraulic system. An air filter 3 is provided at the top of the oil tank assembly 101, and the air filter 3 is communicated with the inside of the oil tank assembly 101. Gas enters the oil tank assembly 101 through the air filter 3, effectively preventing larger particles from entering the oil, and ensuring the safety of the hydraulic system applicable to the single-blade spreader.

[0132] Further, a heater 12 is provided on the side wall of the oil tank assembly 101, and the heater 12 is inserted into the inside of the oil tank assembly 101; the oil tank assembly 101 is provided with an air cooler 9, and the air cooler 9 is fixedly installed above the oil tank 1. The hydraulic oil in the oil tank is heated by the heater 12, and the hydraulic oil returning to the oil tank is cooled by the air cooler 9 to maintain the oil temperature in a suitable working range, ensuring the stability of the oil performance. At the same time, a drain valve 13 is also provided at the bottom of the oil tank 1, and the hydraulic oil inside the oil tank 1 can be discharged regularly according to the actual situation for the operation of replacing the hydraulic oil.

[0133] The fuel supply motor pump set 102 includes a first motor 5, a first gear pump 6, and a first coupling assembly 37. The first motor 5 is drivingly connected to the first gear pump 6 through the first coupling assembly 37. The inlet of the first gear pump 6 is connected to the fuel tank 1, and the outlet of the first gear pump 6 is connected to the main control valve group 104 through a first oil pipe 001.

[0134] The emergency fuel supply motor pump set 103 includes a second motor 25, a second gear pump 38, and a second coupling assembly 39. The second motor 25 is drivingly connected to the second gear pump 38 through the second coupling assembly 39. The inlet of the second gear pump 38 is connected to the fuel tank 1, and the outlet of the second gear pump 38 is connected to the main control valve group 104 through a third oil pipe 003.

[0135] As Figure 4 , Figure 8 shown, the main control valve group 104 includes a first pressure sensor 201, a first pressure gauge 211, a second pressure sensor 202, a second pressure gauge 212, a first filter 15, a second filter 40, a first filter assembly 41, a second filter assembly 42, a third filter assembly 43, a first check valve 141, a second check valve 142, a third check valve 143, a first reversing valve 16, a second reversing valve 18, a first stop valve 19, a first relief valve 171, a second relief valve 172, a third relief valve 173, a high-pressure ball valve 24, and a first accumulator 231. The first filter 15 is arranged on the first oil pipe 001, with its inlet connected to the first check valve 141 and its outlet connected to the second check valve 142. The first filter assembly 41, the second filter assembly 42, and the third filter assembly 43 are arranged in parallel. The front ends of the first filter assembly 41, the second filter assembly 42, and the third filter assembly 43 are connected to the fuel supply motor pump set 102 through the first oil pipe 001 and to the emergency fuel supply motor pump set 103 through a second oil pipe 002, and the rear ends are connected to a seventh oil pipe 007. A third check valve 143 is provided on the seventh oil pipe 007. The end of the seventh oil pipe 007 is sequentially connected to the high-pressure ball valve 24 and the first accumulator 231. The first accumulator 231 is located at the outlet of the second check valve 142, effectively preventing the first accumulator 231 from backflowing into the fuel tank assembly 101. The second oil pipe 002 is an oil return pipeline. The second oil pipe 002 is connected to the inlet of the first filter 15 through the first relief valve 171 and to the outlet of the first filter 15 through the first reversing valve 16. The third oil pipe 003 is connected to the second oil pipe 002 through a sixth oil pipe 006. A second reversing valve 18 and a third relief valve 173 are arranged in parallel on the sixth oil pipe 006. Both ends of the second filter 40 are respectively connected to the air cooler 9 and the fuel tank 1. The present invention ensures the cleanliness of the system oil through multiple filter components. The filter can effectively prevent solid particles with a larger diameter from entering the working oil circuit and the actuator, causing faults such as oil circuit blockage or valve jamming, ensuring the safety of the hydraulic system and extending its service life.

[0136] Furthermore, the main control valve group 104 can filter the oil in the hydraulic unit through the first filter 15, the second filter 40, the first filter assembly 41, the second filter assembly 42, and the third filter assembly 43, and has the function of filter blockage alarm feedback. A first pressure sensor 201 and a first pressure gauge 211 are connected to the sixth oil pipe 006 between the first filter 15 and the third filter assembly 43. A second pressure sensor 202 and a second pressure gauge 212 are connected to the inlet of the second filter assembly 42 on the third oil pipe 003. The pressure feedback of the hydraulic unit is provided by the first pressure gauge 211, the second pressure gauge 212, the first pressure sensor 201, and the second pressure sensor 202. The first check valve 141, the second check valve 142, and the third check valve 143 can prevent the reverse flow of the pressure oil. The first stop valve 19, the first reversing valve 16, and the second reversing valve 18 can drain the pressure oil inside the system. The first relief valve 171, the second relief valve 172, and the third relief valve 173 can provide the highest system pressure safety protection. The inlet and outlet of the first accumulator 231 can be controlled by the high-pressure ball valve 24. The first accumulator 231 can provide emergency energy storage and oil replenishment for the hydraulic unit. The first accumulator 231 is connected to the working oil circuit. When the oil supply motor pump group 102 is running, when the instantaneous pressure of the hydraulic system increases, that is, when the oil pressure in the working oil circuit increases instantaneously, the first accumulator 231 can absorb a part of the oil to ensure the stable and normal operation of the hydraulic system. When the oil supply motor pump group 102 is powered off, the first accumulator 231 can provide pressure oil for the control circuits of the barring gear system, the blade tip clamping system, and the blade root clamping system. The main control valve group 104, as the main system oil supply oil circuit, first supplies hydraulic oil to the reversing valve group 105, and then supplies pressure oil to the barring gear balance valve group 106, the blade tip clamping balance valve group 107, and the blade root clamping balance valve group 108 respectively. The operation is simple and convenient, and it is easy to maintain.

[0137] Such as Figure 8As shown, the main control valve group 104 is connected to the reversing valve group 105 through the eighth oil pipe 008. The reversing valve group 105 includes a first sub-valve group, a second sub-valve group, and a third sub-valve group. The first sub-valve group, the second sub-valve group, and the third sub-valve group are arranged in parallel and their oil inlets are all connected to the eighth oil pipe 008. The oil outlet of the first sub-valve group is connected to the turning gear balance valve group 106 through the oil outlets A1 and B1. The oil outlet of the second sub-valve group is connected to the tip clamping balance valve group 107 through the oil outlets A2 and B2. The oil outlet of the third sub-valve group is connected to the root clamping balance valve group 108 through the oil outlets A3 and B3. The first sub-valve group, the second sub-valve group, and the third sub-valve group are all connected to the second oil pipe 002 through the fifth oil pipe 005, so that the oil returning in the valve group can flow back to the oil tank 1. In the present invention, the oil ports on the turning gear balance valve group 106, the tip clamping balance valve group 107, and the root clamping balance valve group 108 are all concentrated at the same part through the working oil ports A1, A2, A3, B1, B2, and B3, and the structures of the interfaces are the same, which is convenient for users to uniformly dock.

[0138] Specifically, the first sub-valve group includes a fourth check valve 144, a third solenoid-operated directional control valve 261, a first pilot-operated check valve 271, and a first one-way throttle valve 281. The hydraulic oil coming from the eighth oil pipe 008 enters the first pilot-operated check valve 271 and the first one-way throttle valve 281 in sequence through the third solenoid-operated directional control valve 261. The hydraulic oil passing through the third solenoid-operated directional control valve 261 can also be redirected to flow away through the fourth check valve 144. The second sub-valve group includes a fifth check valve 145, a first pressure reducing valve 291, a fourth solenoid-operated directional control valve 262, a second pilot-operated check valve 272, and a second one-way throttle valve 282. The hydraulic oil coming from the eighth oil pipe 008 enters the fourth solenoid-operated directional control valve 262, the second pilot-operated check valve 272, and the second one-way throttle valve 282 in sequence through the first pressure reducing valve 291. The hydraulic oil passing through the fourth solenoid-operated directional control valve 262 can also be redirected to flow away through the fifth check valve 145. The third sub-valve group includes a sixth check valve 146, a fifth solenoid-operated directional control valve 263, a third pilot-operated check valve 273, a third one-way throttle valve 283, and a second pressure reducing valve 292. The hydraulic oil coming from the eighth oil pipe 008 enters the fifth solenoid-operated directional control valve 263, the third pilot-operated check valve 273, and the third one-way throttle valve 283 in sequence through the second pressure reducing valve 292. The hydraulic oil passing through the fifth solenoid-operated directional control valve 263 can also be redirected to flow away through the sixth check valve 146. Among them, the first sub-valve group, the second sub-valve group, and the third sub-valve group can switch the working oil circuits through the third solenoid-operated directional control valve 261, the fourth solenoid-operated directional control valve 262, and the fifth solenoid-operated directional control valve 263 respectively. The first sub-valve group, the second sub-valve group, and the third sub-valve group can prevent the pressure oil from flowing back reversely through the fourth check valve 144, the fifth check valve 145, and the sixth check valve 146 respectively. The first sub-valve group, the second sub-valve group, and the third sub-valve group can achieve locking and long-term internal pressure holding through the first pilot-operated check valve 271, the second pilot-operated check valve 272, and the third pilot-operated check valve 273 respectively. The first sub-valve group, the second sub-valve group, and the third sub-valve group can control the pressure oil entering the directional control valve through the first one-way throttle valve 281, the second one-way throttle valve 282, and the third one-way throttle valve 283 respectively. The second sub-valve group and the third sub-valve group control the oil pressure entering their respective valve groups through the first pressure reducing valve 291 and the second pressure reducing valve 292 respectively. It should be noted that the hydraulic oil flowing out from the fourth check valve 144, the fifth check valve 145, and the sixth check valve 146 can enter the tip clamping balance valve group 107 or the root clamping balance valve group 108 to adjust the corresponding oil pressure.

[0139] Further, the directional control valve group 105 further includes a seventh check valve 147. The hydraulic oil coming from the eighth oil pipe 008 can also directly enter the tip clamping balance valve group 107 or the root clamping balance valve group 108 through the seventh check valve 147.

[0140] The wiring terminal box group 30 connects all the wire harnesses of the electrical components on the main control valve group 104, the directional valve group 105, the barring balance valve group 106, the blade tip clamping balance valve group 107, and the blade root clamping balance valve group 108 to the terminals in the terminal box, serving as the external electrical interface of the hydraulic unit for convenient unified connection by users. Additionally, the shielding layers of all wire harnesses are connected to the terminal box, enabling grounding of the wire harnesses of all electrical components.

[0141] Specifically, the hydraulic system further includes a DC motor pump group, and both ends of the DC motor pump group are respectively communicated with the fuel tank assembly 101 and the main control valve group 104. The DC motor pump group serves as a standby motor pump group, playing an emergency role and enhancing the safety of the system.

[0142] As Figure 6 , Figure 8 shown, the barring balance valve group 106 includes a third pressure sensor 203, a fourth pressure sensor 204, a first balance valve 311, and a second balance valve 312. Both ends of the first balance valve 311 and the second balance valve 312 are respectively communicated with the oil outlet A1 and B1 of the directional valve group 105 and the oil inlet of the barring oil cylinder 36. The first balance valve 311 and the second balance valve 312 can precisely regulate the flow rate of the hydraulic oil in the barring oil cylinder 36, thereby controlling the movement speed of the barring oil cylinder 36. The third pressure sensor 203 and the fourth pressure sensor 204 can monitor the pressure in the barring oil cylinder 36 in real time, greatly enhancing the safety of the hydraulic system applicable to single-blade spreaders. Through the control of the barring balance valve group 106, the overload protection of the barring oil cylinder 36 is achieved and the barring oil cylinder 36 is driven, enabling the hydraulic system to provide a stable and safe power source for the barring oil cylinder 36, and enabling the barring oil cylinder 36 to complete related work more accurately, conveniently, and stably.

[0143] As Figure 8As shown in the figure, the tip clamping balance valve group 107 includes a fifth pressure sensor 205, a sixth pressure sensor 206, a third balance valve 313, a fourth balance valve 314, a sixth electromagnetic directional valve 321, a seventh electromagnetic directional valve 322, and a fourth accumulator 341. The two ends of the third balance valve 313 and the fourth balance valve 314 are respectively connected to the oil outlet A2 and B2 of the directional valve group 105 and the oil inlet of the tip clamping oil cylinder 351. The third balance valve 313 and the fourth balance valve 314 can accurately adjust the flow rate of the hydraulic oil, thereby controlling the movement speed of the tip clamping oil cylinder 351. The fifth pressure sensor 205 and the sixth pressure sensor 206 monitor the pressure in the tip clamping oil cylinder 351 in real time. When the solenoid valve is energized and opened, the second accumulator 232 and the third accumulator 233 supply pressure oil to the tip clamping oil cylinder 351 to help the tip clamping oil cylinder 351 retract quickly and stably. In addition, the fourth accumulator 341 is used to maintain the pressure of the tip clamping oil cylinder 351, can continuously and stably provide power to the tip clamping actuator, plays a pressure maintaining role for the tip clamping system, and can absorb the pulsation of the tip clamping oil cylinder 351, greatly increasing the safety of the hydraulic system applicable to the single-blade spreader. Through the control of the tip clamping balance valve group 107, the overload protection of the tip clamping oil cylinder 351 is achieved and the tip clamping oil cylinder 351 is driven, so that the hydraulic system can provide a stable and safe power source for the tip clamping oil cylinder 351, enabling the tip clamping oil cylinder 351 to complete related work more accurately, conveniently and stably.

[0144] As Figure 7 , Figure 8As shown in the figure, the blade root clamping balance valve group 108 includes a seventh pressure sensor 207, an eighth pressure sensor 208, a fifth balance valve 315, a sixth balance valve 316, an eighth electromagnetic directional valve 323, a ninth electromagnetic directional valve 324, and a fifth accumulator 342. The two ends of the fifth balance valve 315 and the sixth balance valve 316 are respectively connected to the oil outlet A3 and B3 of the directional valve group 105 and the oil inlet of the blade root clamping cylinder 352. The fifth balance valve 315 and the sixth balance valve 316 can accurately adjust the flow rate of the hydraulic oil, thereby controlling the movement speed of the blade root clamping cylinder 352. The seventh pressure sensor 207 and the eighth pressure sensor 208 monitor the pressure in the blade root clamping cylinder 352 in real time. The actuator here is the blade root clamping cylinder 352. When the solenoid valve is electrified and opened, the second accumulator 232 and the third accumulator 233 supply pressure oil to the blade root clamping cylinder 352 to help the blade root clamping cylinder 352 retract quickly and stably. The fifth accumulator 342 is used to maintain the pressure of the blade root clamping cylinder 352, can continuously and stably provide power to the blade root clamping actuator, plays a pressure maintaining role for the blade root clamping system, and can absorb the pulsation of the blade root clamping cylinder 352, greatly increasing the safety of the hydraulic system applicable to the single-blade spreader. Through the control of the blade root clamping balance valve group 108, the overload protection of the blade root clamping system is achieved and the blade root clamping cylinder 352 is driven, so that the hydraulic system can provide a stable and safe power source for the blade root clamping cylinder 352, enabling the blade root clamping cylinder 352 to complete related work more accurately, conveniently, and stably.

[0145] In the present invention, the pressure sensor and the pressure gauge are both connected to the working oil circuit. The pressure gauge is used to display the pressure locally, enabling the staff to control according to the pressure situation to ensure the safety and stability of the hydraulic system. In addition, the pressure detected by the pressure sensor can realize the whole-process and remote monitoring of the pressure of the hydraulic system.

[0146] As Figure 3 , Figure 8As shown, the accumulator installation valve group 109 includes a first accumulator safety valve assembly 221, a second accumulator safety valve assembly 222, a second accumulator 232, and a third accumulator 233. The first accumulator safety valve assembly 221 and the second accumulator 232 are connected in series to form a first accumulator group, and the second accumulator safety valve assembly 222 and the third accumulator 233 are connected in series to form a second accumulator group. The first accumulator group and the second accumulator group are connected in parallel and are both connected to the tip clamping balance valve group 107 and the root clamping balance valve group 108 through the fourth oil pipe 004. Through the second accumulator 232 and the third accumulator 233, an emergency oil source for the hydraulic unit can be provided. The second accumulator 232 and the third accumulator 233 can provide pressure oil for the retraction of the tip clamping and root clamping actuators, playing a role in quickly and stably retracting. Through the first accumulator safety valve assembly 221 and the second accumulator safety valve assembly 222, the oil inlet and oil discharge of the second accumulator 232 and the third accumulator 233 can be controlled. The oil circuit composed of the above various components is used to control the accumulator installation valve group 109. The accumulator in the present invention ensures the stability and safety of the hydraulic system applicable to the single-blade spreader. At the same time, it can work for a long time in a harsh environment and has high reliability.

[0147] In the present invention, the switching of the working oil circuit and the return oil circuit is realized through the reversing valve group 105, which is easy to operate and maintain. Through the barring balance valve group 106, the tip clamping balance valve group 107, and the root clamping balance valve group 108, the action speed of the return oil circuit can be controlled to ensure the stability of the load. At the same time, through the main control valve group 104, the highest safety pressure can be controlled to ensure the stability and safety of the system. In addition, the first accumulator 231 in this system can provide pressure oil for the barring oil cylinder 36, the tip clamping oil cylinder 351, and the root clamping oil cylinder 352 when the oil supply motor pump is powered off. The fourth accumulator 341 and the fifth accumulator 342 play a role in maintaining pressure on the tip clamping oil cylinder 351 and the root clamping oil cylinder 352, and at the same time absorb pulsation. They can work for a long time in a harsh environment. The second accumulator 232 and the third accumulator 233 can provide pressure oil for the quick retraction of the tip clamping oil cylinder 351 and the root clamping oil cylinder 352, with high reliability, ensuring the stability and safety of the system. The hydraulic system applicable to the single-blade spreader in the present invention can enable the barring actuator, the tip clamping actuator, and the root clamping actuator to complete relevant work more accurately, conveniently, and stably.

[0148] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0149] The specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Without conflict, the embodiments of the present application and the features in the embodiments can be combined arbitrarily with each other.

Claims

1. A hydraulic system applicable to a single-blade spreader, characterized in that It includes a fuel tank assembly (101), a fuel supply motor pump set (102), an emergency fuel supply motor pump set (103), a main control valve group (104), a reversing valve group (105), a barring balance valve group (106), a tip clamping balance valve group (107), a root clamping balance valve group (108), an accumulator installation valve group (109), a terminal box group (30) and a housing (110); The interior of the housing (110) has an accommodation space, and the fuel tank assembly (101), the fuel supply motor pump set (102), the emergency fuel supply motor pump set (103), the main control valve group (104), the reversing valve group (105), the barring balance valve group (106), the tip clamping balance valve group (107), the root clamping balance valve group (108), the accumulator installation valve group (109) and the terminal box group (30) are all arranged in the accommodation space; The inlets of the fuel supply motor pump set (102) and the emergency fuel supply motor pump set (103) are both connected to the fuel tank assembly (101), and the outlets are both connected to the main control valve group (104), and the outlet of the main control valve group (104) is connected to the reversing valve group (105); The main control valve group (104) serves as the main system fuel supply oil circuit, which can control the highest safety oil pressure, first supply hydraulic oil to the reversing valve group (105), and then supply pressure oil to the barring balance valve group (106), the tip clamping balance valve group (107) and the root clamping balance valve group (108) respectively; The reversing valve group (105) includes a first sub-valve group, a second sub-valve group and a third sub-valve group. The first sub-valve group, the second sub-valve group and the third sub-valve group are arranged in parallel and their inlet ends are all connected to the main control valve group (104). The outlet end of the first sub-valve group is connected to the barring balance valve group (106) through the outlet ports A1 and B1, the outlet end of the second sub-valve group is connected to the tip clamping balance valve group (107) through the outlet ports A2 and B2, and the outlet end of the third sub-valve group is connected to the root clamping balance valve group (108) through the outlet ports A3 and B3; The tip clamping balance valve group (107) includes a fifth pressure sensor (205), a sixth pressure sensor (206), a third balance valve (313), a fourth balance valve (314), a sixth electromagnetic reversing valve (321), a seventh electromagnetic reversing valve (322) and a fourth accumulator (341); Both ends of the third balance valve (313) and the fourth balance valve (314) are respectively communicated with the outlet ports A2 and B2 of the reversing valve group (105) and the inlet port of the tip clamping oil cylinder (351). The sixth electromagnetic reversing valve ( 321), the fifth pressure sensor (205) and the fourth accumulator (341) are all arranged at the outlet of the third balance valve (313), and the seventh electromagnetic reversing valve (322) and the sixth pressure sensor (206) are all arranged at the outlet of the fourth balance valve (314); It is connected to the accumulator installation valve group (109) through the sixth electromagnetic reversing valve (321); The blade root clamping balance valve group (108) includes a seventh pressure sensor (207), an eighth pressure sensor (208), a fifth balance valve (315), a sixth balance valve (316), an eighth electromagnetic directional control valve (323), a ninth electromagnetic directional control valve (324), and a fifth accumulator (342); Both ends of the fifth balance valve (315) and the sixth balance valve (316) are respectively connected to the oil outlet A3 and B3 of the directional control valve group (105) and the oil inlet of the blade root clamping oil cylinder (352). The eighth electromagnetic directional control valve (323), the seventh pressure sensor (207), and the fifth accumulator (342) are all arranged at the outlet of the fifth balance valve (315). The ninth electromagnetic directional control valve (324) and the eighth pressure sensor (208) are both arranged at the outlet of the sixth balance valve (316); The accumulator installation valve group (109) is connected through the eighth electromagnetic directional control valve (323).

2. The hydraulic system applicable to a single-blade spreader according to claim 1, characterized in that, The fuel tank assembly (101) includes a fuel tank (1), an air filter (3), an air cooler (9), a float type liquid level sensor (10) arranged inside the fuel tank (1), a temperature sensor (11), a liquid level gauge (2), and a heater (12) arranged on the side wall of the fuel tank (1); The air filter (3) is arranged on the top of the fuel tank (1). The air cooler (9) is arranged above the fuel tank (1). The air cooler (9) is used to cool the hydraulic oil returning to the fuel tank (1).

3. The hydraulic system applicable to the single-blade spreader according to claim 1, characterized in that, The oil supply motor pump group (102) includes a first motor (5), a first gear pump (6), and a first coupling assembly (37). The first motor (5) is drivingly connected to the first gear pump (6) through the first coupling assembly (37). The inlet of the first gear pump (6) is connected to the fuel tank assembly (101). The outlet of the first gear pump (6) is connected to the main control valve group (104) through a first oil pipe (001); The emergency oil supply motor pump group (103) includes a second motor (25), a second gear pump (38), and a second coupling assembly (39). The second motor (25) is drivingly connected to the second gear pump (38) through the second coupling assembly (39). The inlet of the second gear pump (38) is connected to the fuel tank assembly (101). The outlet of the second gear pump (38) is connected to the main control valve group (104) through a third oil pipe (003).

4. The hydraulic system applicable to a single-blade spreader according to claim 1, characterized in that, The main control valve group (104) includes a first pressure sensor (201), a first pressure gauge (211), a second pressure sensor (202), a second pressure gauge (212), a first filter (15), a second filter (40), a first filter assembly (41), a second filter assembly (42), a third filter assembly (43), a first check valve (141), a second check valve (142), a third check valve (143), a first directional control valve (16), a second directional control valve (18), a first stop valve (19), a first relief valve (171), a second relief valve (172), a third relief valve (173), a high-pressure ball valve (24), and a first accumulator (231); The first filter (15) is arranged on the first oil pipe (001), with its inlet connected to the first one-way valve (141) and its outlet connected to the second one-way valve (142). The first filter assembly (41), the second filter assembly (42), and the third filter assembly (43) are arranged in parallel. The front ends of the first filter assembly (41), the second filter assembly (42), and the third filter assembly (43) are connected to the oil supply motor pump set (102) through the first oil pipe (001) and to the emergency oil supply motor pump set (103) through the second oil pipe (002). Their rear ends are connected to the seventh oil pipe (007). A third one-way valve (143) is provided on the seventh oil pipe (007). The end of the seventh oil pipe (007) is sequentially connected to the high-pressure ball valve (24) and the first accumulator (231), and the first accumulator (231) is located at the outlet of the second one-way valve (142). The second oil pipe (002) is an oil return pipeline. The second oil pipe (002) is connected to the inlet of the first filter (15) through the first overflow valve (171) and to the outlet of the first filter (15) through the first reversing valve (16). The third oil pipe (003) is connected to the second oil pipe (002) through the sixth oil pipe (006). A second reversing valve (18) and a third overflow valve (173) arranged in parallel are provided in parallel on the sixth oil pipe (006). The two ends of the second filter (40) are respectively connected to the air cooler (9) and the fuel tank assembly (101), and the air cooler (9) is arranged on the second oil pipe (002).

5. The hydraulic system applicable to the single-blade spreader according to claim 1, characterized in that, The main control valve group (104) is connected to the reversing valve group (105) through the eighth oil pipe (008). The oil inlets of the first sub-valve group, the second sub-valve group, and the third sub-valve group are all connected to the eighth oil pipe (008). The first sub-valve group, the second sub-valve group, and the third sub-valve group are all connected to the second oil pipe (002) through the fifth oil pipe (005). The working oil ports A1, A2, A3, B1, B2, and B3 concentrate all the oil ports on the barring balance valve group (106), the tip clamping balance valve group (107), and the root clamping balance valve group (108) to the same position and the structures of the interfaces are the same.

6. The hydraulic system applicable to a single-blade spreader according to claim 5, characterized in that, The first sub-valve group includes a fourth one-way valve (144), a third electromagnetic reversing valve ( The second sub-valve group includes a fifth one-way valve (145), a first pressure reducing valve (291), a fourth solenoid-operated directional control valve (262), a second hydraulic control one-way valve (272), and a second one-way throttle valve (282). The hydraulic oil from the eighth oil pipe (008) enters the fourth solenoid-operated directional control valve (262), the second hydraulic control one-way valve (272), and the second one-way throttle valve (282) in sequence through the first pressure reducing valve (291). The hydraulic oil passing through the fourth solenoid-operated directional control valve (262) can also be redirected to flow away through the fifth one-way valve (145). The third sub-valve group includes a sixth one-way valve (146), a fifth solenoid-operated directional control valve (263), a third hydraulic control one-way valve (273), a third one-way throttle valve (283), and a second pressure reducing valve (292). The hydraulic oil from the eighth oil pipe (008) enters the fifth solenoid-operated directional control valve (263), the third hydraulic control one-way valve (273), and the third one-way throttle valve (283) in sequence through the second pressure reducing valve (292). The hydraulic oil passing through the fifth solenoid-operated directional control valve (263) can also be redirected to flow away through the sixth one-way valve (146). The directional control valve group (105) further includes a seventh one-way valve (147). The hydraulic oil from the eighth oil pipe (008) can also directly enter the tip clamping balance valve group (107) or the root clamping balance valve group (108) through the seventh one-way valve (147).

7. The hydraulic system applicable to a single-blade spreader according to claim 1, characterized in that, The terminal box group (30) connects all the wire harnesses of the electrical components on the main control valve group (104), the directional control valve group (105), the barring balance valve group (106), the tip clamping balance valve group (107), and the root clamping balance valve group (108) to the terminals in the terminal box, serving as the external electrical interface of the hydraulic system. All the shielding layers of the wire harnesses are connected to the terminal box. It further includes a DC motor pump group as a standby motor pump group. The two ends of the DC motor pump group are respectively connected to the oil tank assembly (101) and the main control valve group (104).

8. The hydraulic system applicable to a single-blade spreader according to claim 1, characterized in that, The barring balance valve group (106) includes a third pressure sensor (203), a fourth pressure sensor (204), a first balance valve (311), and a second balance valve (312). The two ends of the first balance valve (311) and the second balance valve (312) are respectively connected to the oil outlet A1 and B1 of the directional control valve group (105) and the oil inlet of the barring oil cylinder (36). The third pressure sensor (203) and the fourth pressure sensor (204) are respectively arranged at the outlets of the first balance valve (311) and the second balance valve (312).

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