Hay rake integrated control valve group

Abstract

The utility model relates to the technical field of control valve banks, and provides a hay rake integrated control valve bank which comprises an integrated valve block, a proportional priority flow valve, an overflow valve, a manual flow valve, an oil cylinder enabling electromagnetic valve, a motor enabling electromagnetic valve, a floating electromagnetic valve, a first two-way safety valve, a second two-way safety valve and a plurality of electromagnetic reversing valves. An oil port P of the integrated valve block is connected with an oil outlet of the hydraulic pump, an oil port T is connected with the oil tank, an oil port B1 is connected with an oil inlet of the raker motor, and an oil port A1 is connected with an oil return port of the raker motor; a proportional priority flow valve, an overflow valve, a manual flow valve, an oil cylinder enabling electromagnetic valve and a motor enabling electromagnetic valve are integrated on the integrated valve block. The valve bank is small in boundary dimension and more compact in structure, reduces installation space, accurately controls output flow and is high in control accuracy.

Description

Technical Field

[0001] The utility model relates to the technical field of control valve groups, in particular to an integrated control valve group for a grass rake. Background Art

[0002] There are many types of grass rakes in my country for different working function requirements, but most of them have relatively simple functions, low working efficiency and low control accuracy. The multifunctional rake grass rake has a large working width, high working efficiency and a wide range of applications.

[0003] The operation control of the grass rake is hydraulically controlled. Since the grass rake has multiple functions, multiple compound actions, and a complex mechanical structure, the control valve group cannot meet the control requirements of the multifunctional grass rake. The grass rake has higher requirements on the structure and principle of the hydraulic control valve group. The existing grass rake control valve group has poor control accuracy, large size, large installation space, and large power loss. Utility Model Content

[0004] The utility model mainly solves the technical problems of the prior art of the control valve group of the rake-type grass mower, which has poor control accuracy, large external dimensions, occupies a large installation space and has large power loss. An integrated control valve group for the grass mower is proposed, which has small external dimensions, a more compact structure, reduced installation space, accurately controls the output flow and has high control accuracy.

[0005] The utility model provides an integrated control valve group for a grass rake, comprising: an integrated valve block, a proportional priority flow valve, a relief valve, a manual flow valve, a cylinder enabling solenoid valve, a motor enabling solenoid valve, a floating solenoid valve, a first two-way safety valve, a second two-way safety valve and a plurality of solenoid reversing valves;

[0006] The P oil port of the integrated valve block is connected to the oil outlet of the hydraulic pump, the T oil port is connected to the oil tank, the B1 oil port is connected to the oil inlet of the hoisting motor, and the A1 oil port is connected to the oil return port of the hoisting motor;

[0007] The integrated valve block is integrated with a proportional priority flow valve, a relief valve, a manual flow valve, a cylinder enabling solenoid valve, and a motor enabling solenoid valve;

[0008] The proportional priority flow valve is respectively connected to the A1 oil port, the P oil port, the relief valve, the manual flow valve, the cylinder enabling solenoid valve, and the motor enabling solenoid valve;

[0009] The relief valve is also connected to the P oil port and the T oil port of the integrated valve block;

[0010] The manual flow valve and the oil cylinder enabling solenoid valve are also connected to the T oil port of the integrated valve block;

[0011] The motor enabling solenoid valve is also connected to the A1 oil port and the B1 oil port of the integrated valve block;

[0012] The floating solenoid valve, the first two-way safety valve, the second two-way safety valve and a plurality of solenoid reversing valves are installed on one side of the integrated valve block;

[0013] The first oil port of each solenoid reversing valve is connected to the manual flow valve, and the second oil port is connected to the T oil port of the integrated valve block;

[0014] The multiple electromagnetic reversing valves are respectively a first electromagnetic reversing valve, a second electromagnetic reversing valve, a third electromagnetic reversing valve, a fourth electromagnetic reversing valve and a fifth electromagnetic reversing valve;

[0015] The first electromagnetic reversing valve is connected to a floating electromagnetic valve, and the A2 oil port and the B2 oil port of the floating electromagnetic valve are used to connect to the lifting cylinder of the grass rake;

[0016] The second electromagnetic reversing valve is connected to the first two-way safety valve, and the A3 oil port and the B3 oil port of the first two-way safety valve are used to connect to the left folding cylinder of the grass rake;

[0017] The third electromagnetic reversing valve is connected to the second two-way safety valve, and the A4 oil port and the B4 oil port of the second two-way safety valve are used to connect to the right folding cylinder of the grass rake;

[0018] The A5 oil port and the B5 oil port of the fourth electromagnetic reversing valve are used to connect the left angle cylinder of the grass rake;

[0019] The A6 oil port and the B6 oil port of the fifth electromagnetic reversing valve are used to connect to the right angle cylinder of the grass rake.

[0020] Preferably, a pressure sensor is installed on the integrated valve block;

[0021] The pressure sensor is connected to the M oil port of the integrated valve block.

[0022] Preferably, a floating solenoid valve is superimposed on the first solenoid reversing valve.

[0023] Preferably, the second electromagnetic reversing valve is provided with a first two-way safety valve in a superimposed manner;

[0024] The second two-way safety valve is arranged on the third electromagnetic reversing valve in a superimposed manner.

[0025] Preferably, the integrated valve block is made of 6061-t6 aluminum alloy material.

[0026] The utility model provides an integrated control valve group for a grass rake, which has multiple control functions, compact structure, high control accuracy and good energy-saving effect. Compared with the prior art, it has the following advantages:

[0027] 1. The utility model integrates the proportional priority flow valve, relief valve, manual flow valve, oil cylinder enabling solenoid valve, and motor enabling solenoid valve on the integrated valve block, which has a small size and saves space; multiple solenoid reversing valves are set, and modular solenoid reversing valves are used. The valve group has a small size and a more compact structure, which reduces the installation space. The two-way safety valve and floating control valve that control the oil circuit of the oil cylinder both adopt a superimposed structure, with small size and high integration.

[0028] 2. When the proportional priority flow valve is working, the oil supply flow of the priority oil circuit is met, and the excess hydraulic oil is directly discharged back to the oil tank, which reduces power loss and heat generation. The priority oil circuit of the priority proportional flow valve can accurately control the output flow according to the set control current, with high control accuracy and good energy-saving effect.

[0029] 3. The manual flow valve adopts a priority flow structure. When it is working, after meeting the priority oil circuit flow demand, the excess hydraulic oil is directly unloaded back to the oil tank, reducing power loss and heat.

[0030] 4. The integrated control valve group of the grass rake of the utility model has the control functions of starting the rake disc, lifting the rake disc, lowering the rake disc, floating the rake disc, folding left, unfolding left, folding right, unfolding right, folding left angle, unfolding left angle, folding right angle, and unfolding right angle. The utility model can meet the working conditions of the rake disc motor and the six-way oil cylinder working at the same time, and can meet the control needs of the multi-functional rake-type grass rake. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of the integrated control valve group of the grass rake provided by the utility model;

[0032] Figure 2 This is a hydraulic principle diagram of the integrated control valve group of the grass rake provided by the utility model;

[0033] Figure 3 The utility model discloses an electromagnetic action table of an integrated control valve group of a grass rake.

[0034] Figure markings: 1. Integrated valve block; 2. Proportional priority flow valve; 3. Overflow valve; 4. Manual flow valve; 5. Cylinder enable solenoid valve; 6. Motor enable solenoid valve; 7. Floating solenoid valve; 801. First two-way safety valve; 802. Second two-way safety valve; 901. First solenoid reversing valve; 902. Second solenoid reversing valve; 903. Third solenoid reversing valve; 904. Fourth solenoid reversing valve; 905. Fifth solenoid reversing valve; 10. Pressure sensor. DETAILED DESCRIPTION

[0035] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for the sake of ease of description, only the parts related to the present invention are shown in the accompanying drawings, rather than all of the contents.

[0036] like Figure 1-2 As shown, the integrated control valve group of the grass mower provided by the embodiment of the utility model includes: an integrated valve block 1, a proportional priority flow valve 2, a relief valve 3, a manual flow valve 4, a cylinder enable solenoid valve 5, a motor enable solenoid valve 6, a floating solenoid valve 7, a first two-way safety valve 801, a second two-way safety valve 802 and a plurality of solenoid reversing valves.

[0037] The P oil port of the integrated valve block 1 is connected to the oil outlet of the hydraulic pump, the T oil port is connected to the oil tank, the B1 oil port is connected to the oil inlet of the swivel motor, and the A1 oil port is connected to the oil return port of the swivel motor. The integrated valve block 1 is integrated with a proportional priority flow valve 2, a relief valve 3, a manual flow valve 4, a cylinder enable solenoid valve 5, and a motor enable solenoid valve 6. Among them, the P oil port is the oil inlet, which is directly supplied by the hydraulic pump; the M oil port is the P port pressure measurement point; the MP is connected to the pressure sensor; the T oil port is the return oil, which is connected to the oil tank.

[0038] The integrated valve block 1 is made of 6061-t6 aluminum alloy material, which can withstand 20MPa high pressure and is lightweight. A pressure sensor 10 is installed on the integrated valve block 1; the pressure sensor 10 is connected to the M oil port of the integrated valve block 1.

[0039] The proportional priority flow valve 2 is respectively connected to the A1 oil port, the P oil port, the relief valve 3, the manual flow valve 4, the oil cylinder enabling solenoid valve 5, and the motor enabling solenoid valve 6. The proportional priority flow valve 2 gives priority to supplying oil to the hoisting motor, and can proportionally control the oil supply flow of the B1 port, and the excess oil is discharged back to the T port.

[0040] The relief valve 3 is also connected to the P oil port and the T oil port of the integrated valve block 1. The relief valve 3 limits the maximum working pressure of the valve group. When the P oil port is over-pressured, the relief valve opens to relieve the load.

[0041] The manual flow valve 4 and the cylinder enabling solenoid valve 5 are also connected to the T oil port of the integrated valve block 1. The manual flow valve 4 can manually proportionally control the maximum output flow of the cylinder oil circuit, and the excess oil is unloaded back to the T oil port; the cylinder enabling solenoid valve 5 is a load-releasing solenoid valve. When the cylinder or motor is not working, the oil inlet of the P oil port is directly unloaded from the valve core to the T oil port.

[0042] The motor enabling solenoid valve 6 is also connected to the A1 oil port and the B1 oil port of the integrated valve block 1. The motor enabling solenoid valve 6 is an enabling valve for the motor to rotate, and the motor can only start rotating when it is powered on.

[0043] The floating solenoid valve 7, the first two-way safety valve 801, the second two-way safety valve 802 and a plurality of electromagnetic reversing valves are installed on one side of the integrated valve block 1. The lifting cylinder needs a floating working condition, and the floating solenoid valve 7 needs to be energized; in the floating working condition, the structure of the building plate rises and falls with the terrain to avoid damage to the mechanical structure caused by overload, and plays a protective role in the mechanical structure of the building plate. The first two-way safety valve 801 is to release the load when the oil circuit pressure of the A3 oil port / B3 oil port exceeds the safety valve pressure to protect the pipeline. The second two-way safety valve 802 is to release the load when the oil circuit pressure of the A4 oil port / B4 oil port exceeds the safety valve pressure to protect the pipeline.

[0044] The first oil port of each solenoid reversing valve is connected to the manual flow valve 4, and the second oil port is connected to the T oil port of the integrated valve block 1. The multiple solenoid reversing valves are respectively the first solenoid reversing valve 901, the second solenoid reversing valve 902, the third solenoid reversing valve 903, the fourth solenoid reversing valve 904 and the fifth solenoid reversing valve 905.

[0045] The first electromagnetic reversing valve 901 is connected to the floating electromagnetic valve 7, and the A2 oil port and the B2 oil port of the floating electromagnetic valve 7 are used to connect the lifting cylinder of the grass rake; specifically, the floating electromagnetic valve 7 is arranged in a superimposed manner on the first electromagnetic reversing valve 901, so that the valve group of the utility model has a small size and a high degree of integration. The A2 oil port is connected to the lifting chamber of the lifting cylinder, and the B2 oil port is connected to the lowering chamber of the lifting cylinder.

[0046] The second electromagnetic reversing valve 902 is connected to the first two-way safety valve 801, and the A3 oil port and the B3 oil port of the first two-way safety valve 801 are used to connect the left folding oil cylinder of the grass rake. Specifically, the first two-way safety valve 801 is superimposed on the second electromagnetic reversing valve 902, so that the valve group of the utility model has a small size and a high degree of integration.

[0047] The third electromagnetic reversing valve 903 is connected to the second two-way safety valve 802, and the A4 oil port and the B4 oil port of the second two-way safety valve 802 are used to connect to the right folding cylinder of the grass rake. Specifically, the second two-way safety valve 802 is superimposed on the third electromagnetic reversing valve 903, so that the valve group of the utility model has a small size and a high degree of integration.

[0048] The A5 oil port and the B5 oil port of the fourth electromagnetic reversing valve 904 are used to connect to the left angle cylinder of the grass rake.

[0049] The A6 oil port and the B6 oil port of the fifth electromagnetic reversing valve 905 are used to connect to the right angle cylinder of the grass rake.

[0050] The utility model provides an integrated control valve group for the grass rake, which has the functions of starting the rake plate, lifting the rake plate, lowering the rake plate, floating the rake plate, folding the left plate, unfolding the left plate, folding the right plate, unfolding the right plate, folding the left angle, unfolding the left angle, folding the right angle, and unfolding the right angle. Figure 3 The solenoid action table shown:

[0051] 1. Start the compass: The proportional priority flow valve 2 and the motor enable solenoid valve 6 are energized at the same time, and the hydraulic oil flow of the B1 oil port of the integrated valve block 1 is adjusted according to the control current of the proportional priority flow valve 2. The excess hydraulic oil returns to the T oil port through the bypass port of the proportional priority flow valve 2 and the cylinder enable solenoid valve 5. The B1 oil port is out, the A1 oil port is back, and the compass motor rotates.

[0052] 2. Lifting the platter: Prioritize proportional flow valve 2, cylinder enabling solenoid valve 5 and Y3B solenoid of the first solenoid directional control valve 901 are energized at the same time, oil flows out of A2 oil port and oil returns to B2 oil port.

[0053] 3. The platform descends: the priority proportional flow valve 2, the cylinder enabling solenoid valve 5 and the Y3A electromagnet of the first solenoid reversing valve 901 are energized at the same time, oil flows out of the B2 oil port and returns to the A1 oil port.

[0054] 4. The platform floats: the electromagnet YF of the floating solenoid valve 7 is energized, the lifting oil ports A2 and B2 of the lifting cylinder are connected to the return oil T at the same time, and the lifting cylinder is in a floating state.

[0055] 5. Left folding: The proportional priority flow valve 2, the cylinder enabling solenoid valve 5 and the Y4B solenoid of the second solenoid reversing valve 902 are energized at the same time, oil flows out of the A3 oil port and oil returns to the B3 oil port.

[0056] 6. Left expansion: the proportional priority flow valve 2, the cylinder enabling solenoid valve 5 and the Y4A solenoid of the second solenoid directional control valve 902 are energized at the same time, oil flows out of the B3 oil port and oil returns to the A3 oil port.

[0057] 7. Right folding: The proportional priority flow valve 2, the cylinder enabling solenoid valve 5 and the Y5B solenoid of the third solenoid reversing valve 903 are energized at the same time, oil flows out from the A4 oil port and oil returns from the B4 oil port.

[0058] 8. Right expansion: The proportional priority flow valve 2, the cylinder enabling solenoid valve 5 and the Y5A solenoid of the third solenoid reversing valve 903 are energized at the same time, oil flows out from the B4 oil port and oil returns from the A4 oil port.

[0059] 9. Left angle folding: the proportional priority flow valve 2, the cylinder enabling solenoid valve 5 and the Y6B solenoid of the fourth solenoid reversing valve 904 are energized at the same time, oil flows out from the A5 oil port and oil returns from the B5 oil port.

[0060] 10. Left angle expansion: the proportional priority flow valve 2, the cylinder enabling solenoid valve 5 and the Y6A solenoid of the fourth solenoid reversing valve 904 are energized at the same time, oil flows out of the B5 oil port and oil returns to the A5 oil port.

[0061] 11. Right angle folding: the proportional priority flow valve 2, the cylinder enabling solenoid valve 5 and the Y7B solenoid of the fifth solenoid reversing valve 905 are energized at the same time, oil flows out from the A6 oil port and oil returns from the B6 oil port.

[0062] 12. Right angle expansion: the proportional priority flow valve 2, the cylinder enabling solenoid valve 5 and the Y7A solenoid of the fifth solenoid reversing valve 905 are energized at the same time, oil flows out of the B6 oil port and oil returns to the A6 oil port.

[0063] When the grass rake is not working, the oil from the P oil port returns to the T oil port of the valve group and returns to the oil tank through the bypass port of the proportional priority flow valve 2 and the cylinder enabling solenoid valve 5 in the valve group.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that modifying the technical solutions recorded in the aforementioned embodiments, or replacing part or all of the technical features therein by equivalents, does not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A grass rake integrated control valve group, characterized in that: include: An integrated valve block (1), a proportional priority flow valve (2), a relief valve (3), a manual flow valve (4), a cylinder enabling solenoid valve (5), a motor enabling solenoid valve (6), a floating solenoid valve (7), a first two-way safety valve (801), a second two-way safety valve (802) and a plurality of solenoid reversing valves; The P oil port of the integrated valve block (1) is connected to the oil outlet of the hydraulic pump, the T oil port is connected to the oil tank, the B1 oil port is connected to the oil inlet of the hoisting motor, and the A1 oil port is connected to the oil return port of the hoisting motor; The integrated valve block (1) is integrated with a proportional priority flow valve (2), a relief valve (3), a manual flow valve (4), a cylinder enabling solenoid valve (5), and a motor enabling solenoid valve (6); The proportional priority flow valve (2) is respectively connected to the A1 oil port, the P oil port, the relief valve (3), the manual flow valve (4), the cylinder enabling solenoid valve (5), and the motor enabling solenoid valve (6); The overflow valve (3) is also connected to the P oil port and the T oil port of the integrated valve block (1); The manual flow valve (4) and the oil cylinder enabling solenoid valve (5) are also connected to the T oil port of the integrated valve block (1); The motor enabling solenoid valve (6) is also connected to the A1 oil port and the B1 oil port of the integrated valve block (1); The floating solenoid valve (7), the first two-way safety valve (801), the second two-way safety valve (802) and a plurality of solenoid reversing valves are installed on one side of the integrated valve block (1); The first oil port of each electromagnetic reversing valve is connected to the manual flow valve (4), and the second oil port is connected to the T oil port of the integrated valve block (1); The multiple electromagnetic reversing valves are respectively a first electromagnetic reversing valve (901), a second electromagnetic reversing valve (902), a third electromagnetic reversing valve (903), a fourth electromagnetic reversing valve (904) and a fifth electromagnetic reversing valve (905); The first electromagnetic reversing valve (901) is connected to the floating electromagnetic valve (7), and the A2 oil port and the B2 oil port of the floating electromagnetic valve (7) are used to connect to the lifting cylinder of the grass rake; The second electromagnetic reversing valve (902) is connected to the first two-way safety valve (801), and the A3 oil port and the B3 oil port of the first two-way safety valve (801) are used to connect to the left folding oil cylinder of the grass rake; The third electromagnetic reversing valve (903) is connected to the second two-way safety valve (802), and the A4 oil port and the B4 oil port of the second two-way safety valve (802) are used to connect to the right folding cylinder of the grass rake; The A5 oil port and the B5 oil port of the fourth electromagnetic reversing valve (904) are used to connect to the left angle cylinder of the grass rake; The A6 oil port and the B6 oil port of the fifth electromagnetic reversing valve (905) are used to connect to the right angle cylinder of the grass rake.

2. The integrated control valve group for a grass rake according to claim 1, characterized in that: A pressure sensor (10) is installed on the integrated valve block (1); The pressure sensor (10) is connected to the M oil port of the integrated valve block (1).

3. The integrated control valve group for a grass rake according to claim 1, characterized in that: The first electromagnetic reversing valve (901) is provided with a floating electromagnetic valve (7) in a stacked manner.

4. The integrated control valve group for a grass rake according to claim 3, characterized in that: The second electromagnetic reversing valve (902) is provided with a first two-way safety valve (801) in a stacked manner; The second two-way safety valve (802) is arranged on the third electromagnetic reversing valve (903) in a stacked manner.

5. The integrated control valve group for a grass rake according to claim 1, characterized in that: The integrated valve block (1) is made of 6061-t6 aluminum alloy material.

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