Hydraulic multi-way valve for tractor-mounted farm implements

Abstract

The utility model discloses a kind of hydraulic multi-way valves for tractor suspension agricultural implements, including the oil inlet body, main control valve body, rear output valve body and baffle connected in sequence, the number of rear output valve body is one or more;The inside of main control valve body and rear output valve body is all provided with valve core, two sealing ring bodies symmetrically arranged in valve core middle part, form oil passage between two sealing ring bodies, the opposite outer side of two sealing ring bodies is all set up with multiple circumferentially distributed grooves;Valve core end portion has two positioning ring bodies symmetrically arranged, and positioning ring body and sealing ring body form oil passage between them.The hydraulic multi-way valve provided by the utility model can reduce the oil return cross-sectional area, so that the oil return amount is less than the oil inlet amount, thereby effectively controlling the descent speed of the agricultural implement, achieving the slow descent function;It can also solve the problem of poor universality of existing hydraulic multi-way valves, which is not convenient for expansion according to different needs.

Description

Technical Field

[0001] This utility model relates to a hydraulic multi-way valve for tractor-mounted agricultural implements, belonging to the field of hydraulic valve technology. Background Technology

[0002] To raise or lower implements suspended behind a tractor, a hydraulic lifter needs to be installed at the rear of the tractor, controlled by a hydraulic multi-way valve. However, traditional hydraulic multi-way valves have been found to have the following technical problems in practice: 1. When the hydraulic valve core controls the descent of agricultural implements, the cross-sectional area of ​​the return oil channel is usually equal to that of the inlet oil channel, and the return oil volume is equal to the inlet oil volume. This causes the agricultural implement to descend too quickly and with a large impact under the action of gravity. This not only easily damages the agricultural implement and the suspension mechanism, but also poses a threat to operational safety, such as the problem of sudden bounce upon landing.

[0003] 2. Traditional hydraulic multi-way valves are usually integral valve blocks with a fixed number of oil lines. If more oil lines are needed, it is often necessary to replace the entire valve group or add additional independent valve blocks, which is not convenient for expansion according to different needs.

[0004] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0005] This utility model addresses the shortcomings of the prior art by providing a hydraulic multi-way valve for tractor-mounted agricultural implements. It can reduce the return oil cross-sectional area, making the return oil volume less than the inlet oil volume, thereby effectively controlling the descent speed of the agricultural implements and realizing a slow descent function. It can also solve the problem of poor versatility of hydraulic multi-way valves and the inconvenience of expanding them according to different needs.

[0006] To solve the above technical problems, the present invention adopts the following technical solution: A hydraulic multi-way valve for tractor-mounted agricultural implements includes an oil inlet body, a main control valve body, a rear output valve body, and a plug plate connected in sequence. The number of rear output valve bodies is one or more. A valve core is installed inside both the main control valve body and the rear output valve body. Two symmetrically arranged sealing rings are located in the middle of the valve core, and an oil passage groove is formed between the two sealing rings. Multiple circumferentially distributed grooves are opened on the opposite outer sides of the two sealing rings. Two symmetrically arranged positioning rings are located at the end of the valve core, and an oil passage groove is formed between the positioning rings and the sealing rings.

[0007] Furthermore, the oil inlet body, main control valve body, rear output valve body, and plug plate are fastened together by multiple threaded rods.

[0008] Furthermore, the main body of the lead screw extends horizontally through the plug plate, the rear output valve body, and the main control valve body, with the tail end of the lead screw fastened to the oil inlet body.

[0009] Furthermore, cartridge valves are installed on the sides of both the oil inlet body and the main control valve body. A safety valve is installed below the cartridge valve on the oil inlet body, and an overflow valve is installed on the opposite side of the cartridge valve on the main control valve body.

[0010] Furthermore, the oil inlet body is provided with a main oil inlet and a main oil return port.

[0011] Furthermore, the oil inlet body, the main control valve body, and the rear output valve body are all provided with sequentially connected oil inlet channels in the middle and sequentially connected oil return channels at the bottom.

[0012] Furthermore, both the main control valve body and the rear output valve body are provided with working oil port A and working oil port B above them, and both working oil port A and working oil port B can be connected to the oil inlet channel and the oil return channel.

[0013] Furthermore, both ends of the valve core are connected to solenoid valves, which are symmetrically arranged on both sides of the main control valve body and the rear output valve body.

[0014] Furthermore, the groove has a semi-waist-shaped hole structure.

[0015] Compared with the prior art, the present invention, by adopting the above technical solution, has the following advantages: In this invention, the valve core has multiple circumferentially distributed grooves on the outer sides of the two sealing rings facing each other. By setting the grooves, the oil return cross-sectional area of ​​the working oil port A / working oil port B is smaller than the oil inlet cross-sectional area of ​​the working oil port A / working oil port B, and the oil return volume is smaller than the oil inlet volume. This allows the descent speed of the agricultural machinery to be controlled, achieving the purpose of slow descent.

[0016] The oil inlet body, main control valve body, rear output valve body, and plug plate in this utility model can be modularly assembled. The number of rear output valve bodies can be flexibly selected to suit different scenarios, thereby improving the versatility of the hydraulic multi-way valve.

[0017] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural view of the present invention; Figure 2 This is a three-dimensional view of the structure of this utility model in another direction; Figure 3 yes Figure 2 Schematic diagram of the cross section at point AA; Figure 4 This is a schematic diagram of the valve core installation; Figure 5 This is a 3D structural diagram of the valve core.

[0019] In the diagram, 1-oil inlet body, 2-main control valve body, 3-rear output valve body, 4-blocking plate, 5-screw, 6-cartridge valve, 7-relief valve, 8-valve core, 9-solenoid valve, 10-main oil inlet, 11-main oil return, 12-working oil port A, 13-working oil port B, 14-oil inlet channel, 15-oil return channel, 16-sealing ring, 17-groove, 18-positioning ring, 19-safety valve. Detailed Implementation

[0020] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described with reference to the accompanying drawings.

[0021] like Figures 1-5 As shown in the figure, this utility model provides a hydraulic multi-way valve for tractor-mounted agricultural implements, including an oil inlet body 1, a main control valve body 2, a rear output valve body 3, and a plug plate 4 connected in sequence. The oil inlet body 1, the main control valve body 2, the rear output valve body 3, and the plug plate 4 are fastened together by multiple threaded rods 5.

[0022] The number of the post-output valve body 3 can be one or more, and can be flexibly selected according to the applicable scenario.

[0023] The main body of the lead screw 5 passes through the blockage plate 4, the rear output valve body 3 and the main control valve body 2 in the horizontal direction, and the tail of the lead screw 5 is fastened to the oil inlet body 1.

[0024] The oil inlet body 1, the main control valve body 2, and the rear output valve body 3 are all provided with oil inlet channels 14 connected in sequence in the middle, and the oil return channels 15 are all connected in sequence at the bottom of the oil inlet body 1, the main control valve body 2, and the rear output valve body 3.

[0025] Both the oil inlet body 1 and the main control valve body 2 are equipped with cartridge valves 6 on their sides. A safety valve 19 is provided below the cartridge valve 6 on the oil inlet body 1, and an overflow valve 7 is installed on the opposite side of the cartridge valve 6 on the main control valve body 2.

[0026] The oil inlet body 1 is provided with a main oil inlet 10 and a main oil return port 11.

[0027] Both the main control valve body 2 and the rear output valve body 3 are provided with working oil ports A12 and B13, which can be connected to the oil inlet channel 14 and the oil return channel 15.

[0028] Both the main control valve body 2 and the rear output valve body 3 have valve cores 8 inserted inside. The two ends of the valve core 8 are connected to solenoid valves 9, which are symmetrically arranged on both sides of the main control valve body 2 and the rear output valve body 3. When the solenoid valves 9 are energized, they push the valve cores 8 to move, thereby realizing the switching or on / off control of the hydraulic oil circuit.

[0029] The valve core 8 has two symmetrically arranged sealing rings 16 in the middle, and an oil groove is formed between the two sealing rings 16. When the oil groove moves to the left, the oil inlet channel 14 is connected to the working oil port A12. When the oil groove moves to the right, the oil inlet channel 14 is connected to the working oil port B13.

[0030] Multiple circumferentially distributed grooves 17 are provided on the opposite outer sides of the two sealing rings 16. The grooves 17 have a semi-waist-shaped hole structure. By setting the grooves 17, the oil return cross-sectional area of ​​the working oil port A12 / working oil port B13 is smaller than the oil inlet cross-sectional area of ​​the working oil port A12 / working oil port B13.

[0031] The valve core 8 has two symmetrically arranged positioning rings 18 at its end, and an oil passage groove is formed between the positioning rings 18 and the sealing rings 16.

[0032] The specific working principle of this utility model is as follows: The oil inlet body 1, main control valve body 2, rear output valve body 3, and plug plate 4 in this utility model can be modularly assembled. The number of rear output valve bodies 3 can be flexibly selected to suit different scenarios.

[0033] In this utility model, the two sealing rings 16 on the valve core 8 are provided with multiple circumferentially distributed grooves 17 on their opposite outer sides. By setting the grooves 17, the oil return cross-sectional area of ​​the working oil port A12 / working oil port B13 is smaller than the oil inlet cross-sectional area of ​​the working oil port A12 / working oil port B13, and the oil return volume is smaller than the oil inlet volume. This can control the descent speed of the agricultural machinery and achieve the purpose of slow descent.

[0034] The above description provides examples of the preferred embodiments of this utility model. Any aspects not detailed herein are common knowledge to those skilled in the art. The scope of protection of this utility model is determined by the claims. Any equivalent modifications based on the technical teachings of this utility model are also within the scope of protection of this utility model.

Claims

1. A hydraulic multi-way valve for tractor-mounted agricultural implements, characterized in that: The system includes an oil inlet body (1), a main control valve body (2), a rear output valve body (3), and a plug plate (4) connected in sequence. The number of rear output valve bodies (3) is one or more. The main control valve body (2) and the rear output valve body (3) are both equipped with valve cores (8). There are two symmetrically arranged sealing rings (16) in the middle of the valve core (8). An oil passage groove is formed between the two sealing rings (16). Multiple circumferentially distributed grooves (17) are opened on the opposite outer sides of the two sealing rings (16). There are two symmetrically arranged positioning rings (18) at the end of the valve core (8). An oil passage groove is formed between the positioning rings (18) and the sealing rings (16).

2. The hydraulic multi-way valve for tractor-mounted agricultural implements as described in claim 1, characterized in that: The oil inlet body (1), the main control valve body (2), the rear output valve body (3) and the plug plate (4) are fastened together by multiple threaded rods (5).

3. The hydraulic multi-way valve for tractor-mounted agricultural implements as described in claim 2, characterized in that: The main body of the lead screw (5) passes through the plug plate (4), the rear output valve body (3) and the main control valve body (2) in the horizontal direction, and the tail of the lead screw (5) is fastened in the oil inlet body (1).

4. The hydraulic multi-way valve for tractor-mounted agricultural implements as described in claim 1, characterized in that: Both the oil inlet body (1) and the main control valve body (2) are equipped with cartridge valves (6). A safety valve (19) is provided below the cartridge valve (6) on the oil inlet body (1), and an overflow valve (7) is installed on the opposite side of the cartridge valve (6) on the main control valve body (2).

5. A hydraulic multi-way valve for tractor-mounted agricultural implements as described in claim 1, characterized in that: The oil inlet body (1) is provided with a main oil inlet (10) and a main oil return port (11).

6. A hydraulic multi-way valve for tractor-mounted agricultural implements as described in claim 1, characterized in that: The oil inlet body (1), the main control valve body (2) and the rear output valve body (3) are all provided with oil inlet channels (14) connected in sequence in the middle, and oil return channels (15) connected in sequence at the bottom.

7. A hydraulic multi-way valve for tractor-mounted agricultural implements as described in claim 6, characterized in that: The main control valve body (2) and the rear output valve body (3) are each provided with a working oil port A (12) and a working oil port B (13), which can be connected to the oil inlet channel (14) and the oil return channel (15).

8. A hydraulic multi-way valve for tractor-mounted agricultural implements as described in claim 1, characterized in that: The two ends of the valve core (8) are connected to the solenoid valve (9) respectively. The solenoid valve (9) is symmetrically arranged on both sides of the main control valve body (2) and the rear output valve body (3).

9. A hydraulic multi-way valve for tractor-mounted agricultural implements as described in claim 1, characterized in that: The groove (17) is a semi-waist-shaped hole structure.

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