CN219298298U - Hydraulic system of hydraulic control land leveler - Google Patents
Hydraulic system of hydraulic control land leveler Download PDFInfo
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- CN219298298U CN219298298U CN202223569528.XU CN202223569528U CN219298298U CN 219298298 U CN219298298 U CN 219298298U CN 202223569528 U CN202223569528 U CN 202223569528U CN 219298298 U CN219298298 U CN 219298298U
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Abstract
The utility model discloses a hydraulic system of a hydraulic control grader, and belongs to the technical field of engineering machinery. The automatic control system solves the defects that in the prior art, the traditional land leveler has large operating force by manually controlling the multi-way valve, the labor intensity of an operator is high when the land leveler works, and the yield of the manually controlled multi-way valve is low and the cost is high. The main structure of the hydraulic control system comprises a working pump, a priority valve, a pilot control handle, a hydraulic control multi-way valve and a brake pump, wherein the working pump is connected with the priority valve, an EF (electric field) port of the priority valve is connected with the hydraulic control multi-way valve, a CF port is connected with a steering system, the hydraulic control multi-way valve is connected with an executing mechanism, and the pilot control handle is respectively connected with a hydraulic control port of the hydraulic control multi-way valve and the brake pump. The utility model is mainly used for engineering machinery such as graders and the like.
Description
Technical Field
The utility model belongs to the technical field of engineering machinery, and particularly relates to a hydraulic system of a hydraulic control land leveler.
Background
The land leveler has 8 movements at least, every movement is controlled by a multi-way valve of a link, and the existing land leveler is a manual control multi-way valve, the operating force is large, the labor intensity of operators is large when the land leveler works, and the yield of the manual control multi-way valve is small, and the cost is high. In addition, when the land leveler works, when the shovel blade and the bulldozer blade meet external loads, the impact is completely absorbed by the oil cylinder, and when the left load and the right load of the shovel blade are inconsistent, the speeds of the left lifting oil cylinder and the right lifting oil cylinder are easy to be inconsistent, and because the manual control multi-way valve is of a casting structure, the structure is difficult to change, and the problems are difficult to adjust. If a pilot control handle and a hydraulic control multi-way valve are adopted, the problems can be well solved, but the existing land leveler loop can not provide a stable pilot oil source for the pilot control handle.
Disclosure of Invention
The hydraulic system of the hydraulic control land leveler has the advantages that the hydraulic system of the hydraulic control land leveler is small in operating force, flexible and portable in operation, and because the hydraulic control multi-way valve is high in annual output and low in cost, most of valves are used, the hydraulic control land leveler is convenient to change, more replaceable modules are used, various functions can be realized more conveniently, meanwhile, the pilot oil source block is added in the hydraulic circuit, the brake circuit charging valve oil liquid of the brake system is introduced, and a stable pilot oil source is provided for a pilot control handle.
In order to achieve the above purpose, the present utility model is realized by adopting the following technical scheme:
the utility model provides a hydraulic control grader hydraulic system, includes working pump, priority valve, guide's control handle, hydraulically controlled multiple unit valve and pump, the working pump is connected with the priority valve, and the EF mouth of priority valve is connected with hydraulically controlled multiple unit valve, and the CF mouth is connected with steering system, and hydraulically controlled multiple unit valve is connected with actuating mechanism, and guide's control handle is connected with hydraulically controlled multiple unit valve's hydraulically controlled mouth and pump respectively.
Preferably, a pilot oil source block is arranged between the pump and the pilot control handle.
Preferably, the hydraulic control system further comprises a brake circuit charging valve, an oil outlet of the pump is connected with a P1 port of the brake circuit charging valve, an O port of the brake circuit charging valve is connected with a P2 port of a pilot oil source block, and an A port of the pilot oil source block is connected with a P port of a pilot control handle.
Preferably, the hydraulic control multi-way valve comprises a shovel angle conversion unit, a bulldozer blade unit, a right shovel blade lifting unit, a left shovel blade lifting unit and a shovel blade leading-out unit.
Preferably, a damping hole is arranged between the right scraper knife lifting link and the left scraper knife lifting link.
Preferably, the executing mechanism comprises a soil angle conversion cylinder, a scraper blade leading-out cylinder, a left scraper blade lifting cylinder, a right scraper blade lifting cylinder and a bulldozer plate cylinder, wherein the soil angle conversion cylinder is connected with the soil angle conversion unit, the scraper blade leading-out cylinder is connected with the scraper blade leading-out unit, the left scraper blade lifting cylinder is connected with the left scraper blade lifting unit, the right scraper blade lifting cylinder is connected with the right scraper blade lifting unit, and the bulldozer plate cylinder is connected with the bulldozer plate unit.
Preferably, the hydraulic control multi-way valve further comprises a first oil supplementing overflow valve and a second oil supplementing overflow valve, wherein the first oil supplementing overflow valve is arranged between the soil shoveling angle conversion oil cylinder and the oil port T1, and the second oil supplementing overflow valve is arranged between the bulldozer plate oil cylinder and the oil port T1.
Preferably, the working pump is a load-sensitive variable pump.
Compared with the prior art, the utility model has the beneficial effects that:
1. unlike available land leveling machine with manual control multiple way valve, the present utility model has pilot control handle and hydraulic control multiple way valve to realize land leveling machine operation, small operation force, flexible and light operation, great reduction in the work strength of the operator, high yield of the hydraulic control multiple way valve, low cost, convenient manufacture and easy addition of various functions to the valve;
2. the pump is used for providing brake oil and pilot oil, so that the pump is fully utilized, and the functions of the hydraulic element are maximized;
3. the pilot oil source block and the energy accumulator are arranged on the pilot oil path, so that the influence of pressure and flow fluctuation of a brake loop on the pilot oil path can be avoided, and a stable pilot oil source is provided;
4. a damping hole is arranged between the right scraper lifting link and the left scraper lifting link of the hydraulic control multi-way valve, and the first pressure compensation valve and the second pressure compensation valve for lifting the left scraper and the right scraper are communicated, so that flow compensation is realized when loads of the left scraper and the right scraper are inconsistent, the speed is consistent, and the synchronization performance is good;
5. the first oil supplementing overflow valve is added at the shovel angle conversion joint of the hydraulic control multi-way valve, and the second oil supplementing overflow valve is added at the bulldozer blade joint, so that impact can be prevented when the hydraulic control multi-way valve meets an obstacle, and the hydraulic control multi-way valve is not completely dependent on self absorption impact of the shovel angle conversion oil cylinder and the bulldozer blade oil cylinder;
in summary, the land leveler is operated by using the pilot control handle and the hydraulic control multi-way valve, the operation force is small, the operation is flexible and portable, and the hydraulic control multi-way valve has large annual output, low cost and multiple valves, is convenient to change, simple and convenient, has more replaceable modules, can more conveniently realize various functions, and simultaneously, the pilot oil source block is added in the hydraulic circuit, and the brake circuit charging valve oil liquid of the brake system is introduced to provide a stable pilot oil source for the pilot control handle.
Drawings
FIG. 1 is a diagram of a hydraulic system of the present utility model;
fig. 2 is a partial enlarged view of N in fig. 1.
In the figure: 1. a working pump; 2. a priority valve; 3. a pilot control handle; 4. a hydraulically controlled multiway valve; 5. an oil supplementing overflow valve I; 6. a damping hole; 7. a pilot oil source block; 8. an accumulator; 9. a diverter; 10. a brake circuit charge valve; 11. a pump; 12. the shovel angle is transformed; 13. a bulldozer plate is connected; 14. the right shovel blade is connected in a lifting way; 15. the left shovel blade is connected in a lifting way; 16. the shovel blade is led out and connected; 17. a shovel angle conversion oil cylinder; 18. the shovel blade is led out of the oil cylinder; 19. a left scraper lifting cylinder; 20. a right shovel blade lifting cylinder; 21. a bulldozer plate cylinder; 22. a first pressure compensation valve; 23. a second pressure compensation valve; 24. and an oil supplementing overflow valve II.
Detailed Description
The utility model will now be further illustrated by means of specific examples in connection with the accompanying drawings.
Example 1:
as shown in fig. 1-2, the hydraulic system of the hydraulic control grader comprises a working pump 1, a priority valve 2, a pilot control handle 3, a hydraulic control multi-way valve 4 and a pump 11, wherein the working pump 1 is connected with an oil inlet of the priority valve 2, an EF (electric field) port of the priority valve 2 is connected with the hydraulic control multi-way valve 4, a CF (electric field) port is connected with a steering system, the hydraulic control multi-way valve 4 is connected with an executing mechanism, and the pilot control handle 3 is respectively connected with a hydraulic control port of the hydraulic control multi-way valve 4 and an oil outlet of the pump 11. Wherein the steering system comprises a steering gear 9 and a steering cylinder; the working pump 1 is a load sensitive variable pump; the pilot control handle 3 is a plurality of groups of pressure reducing valves and provides pilot oil for the pilot control multi-way valve 4.
Example 2:
a pilot oil source block 7 is arranged between the pump 11 and the pilot control handle 3.
The hydraulic control system further comprises a brake circuit charging valve 10, an oil outlet of the pump 11 is connected with a P1 port of the brake circuit charging valve 10, an O port of the brake circuit charging valve 10 is connected with a P2 port of the pilot oil source block 7, and an A port of the pilot oil source block 7 is connected with a P port of the pilot control handle 3.
The hydraulic control multi-way valve 4 comprises a shovel angle conversion unit 12, a bulldozer blade unit 13, a right shovel blade lifting unit 14, a left shovel blade lifting unit 15 and a shovel blade leading-out unit 16, wherein a damping hole 6 is formed between a second pressure compensation valve 23 on the right shovel blade lifting unit 14 and a first pressure compensation valve 22 on the left shovel blade lifting unit 15.
The executing mechanism comprises a soil angle conversion oil cylinder 17, a shovel blade leading-out oil cylinder 18, a left shovel blade lifting oil cylinder 19, a right shovel blade lifting oil cylinder 20 and a bulldozer blade oil cylinder 21, wherein the soil angle conversion oil cylinder 17 is connected with the soil angle conversion link 12, the shovel blade leading-out oil cylinder 18 is connected with the shovel blade leading-out link 16, the left shovel blade lifting oil cylinder 19 is connected with the left shovel blade lifting link 15, the right shovel blade lifting oil cylinder 20 is connected with the right shovel blade lifting link 14, and the bulldozer blade oil cylinder 21 is connected with the bulldozer blade link 13.
The hydraulic control multi-way valve 4 further comprises a first oil supplementing overflow valve 5 and a second oil supplementing overflow valve 24, wherein the first oil supplementing overflow valve 5 is arranged between the soil shoveling angle conversion oil cylinder 17 and the oil port T1, and the second oil supplementing overflow valve 24 is arranged between the bulldozer plate oil cylinder 21 and the oil port T1. The oil port T1 is connected with an oil tank. The other parts are the same as in example 1.
The working principle of the utility model is as follows:
the working pump 1 supplies oil to the hydraulic control multi-way valve 4 and the steering gear 9 through the priority valve 2 at the same time, thereby realizing various working and steering of the grader and realizing priority steering. The first oil supplementing overflow valve 5 is added at the soil shoveling angle conversion unit 12 of the hydraulic control multi-way valve 4, and the second oil supplementing overflow valve 24 is added at the bulldozer blade unit 13, so that when the shovel blade and the bulldozer blade work, when external load is met, buffering and oil supplementing are carried out through the first oil supplementing overflow valve 5 and the second oil supplementing overflow valve 24, and the impact of an oil cylinder is reduced; meanwhile, a damping hole 6 is added between the right scraper lifting link 14 and the left scraper lifting link 15 of the hydraulic control multi-way valve 4, and the first pressure compensation valve 22 and the second pressure compensation valve 23 for lifting the left scraper and the right scraper are communicated, so that flow compensation is realized when loads of the left scraper and the right scraper are inconsistent under the condition that the work of the left scraper and the right scraper is not influenced, the speed is consistent, and the synchronization performance is good; for realizing other actions of the grader, the number of the pressure reducing valve of the pilot control handle 3 and the hydraulic control multi-way valve 4 can be increased. The pilot oil of the pilot control multi-way valve 4 is provided by a pilot control handle 3, a pump 11 is connected with a brake loop charging valve 10, the brake oil pressure is preferentially met, when the brake pressure is enough, the oil of the pump 11 is connected with a pilot oil source block 7 through an O port of the brake loop charging valve 10, and then is connected with a P port of the pilot control handle 3, so that the pilot oil is provided for the pilot control multi-way valve 4; the pilot oil source block 7 is simultaneously connected with the accumulator 8, when the flow and the pressure of the brake oil are insufficient, the oil preferentially meets the filling, and the accumulator 8 on the pilot oil source block 7 can supplement the flow and the pressure of a pilot oil way and maintain the stability of the flow of the pilot pressure.
Claims (8)
1. The utility model provides a hydraulic control leveler hydraulic system which characterized in that: the hydraulic control system comprises a working pump (1), a priority valve (2), a pilot control handle (3), a hydraulic control multi-way valve (4) and a pump (11), wherein the working pump (1) is connected with the priority valve (2), an EF (electric field) port of the priority valve (2) is connected with the hydraulic control multi-way valve (4), a CF (electric field) port is connected with a steering system, the hydraulic control multi-way valve (4) is connected with an actuating mechanism, and the pilot control handle (3) is respectively connected with a hydraulic control port of the hydraulic control multi-way valve (4) and the pump (11).
2. The hydraulically controlled grader hydraulic system of claim 1, wherein: a pilot oil source block (7) is arranged between the pump (11) and the pilot control handle (3).
3. The hydraulically controlled grader hydraulic system of claim 2, wherein: the hydraulic control system further comprises a brake circuit charging valve (10), an oil outlet of the pump (11) is connected with a P1 port of the brake circuit charging valve (10), and an O port of the brake circuit charging valve (10) is connected with a pilot oil source block (7).
4. A hydraulically controlled grader hydraulic system as in any one of claims 1-3 wherein: the hydraulic control multi-way valve (4) comprises a shovel angle conversion unit (12), a bulldozer blade unit (13), a right shovel blade lifting unit (14), a left shovel blade lifting unit (15) and a shovel blade leading-out unit (16).
5. The hydraulically controlled grader hydraulic system of claim 4, wherein: a damping hole (6) is arranged between the right scraper knife lifting link (14) and the left scraper knife lifting link (15).
6. The hydraulically controlled grader hydraulic system of claim 4, wherein: the executing mechanism comprises a soil angle conversion cylinder (17), a scraper blade leading-out cylinder (18), a left scraper blade lifting cylinder (19), a right scraper blade lifting cylinder (20) and a bulldozer plate cylinder (21), wherein the soil angle conversion cylinder (17) is connected with the soil angle conversion unit (12), the scraper blade leading-out cylinder (18) is connected with the scraper blade leading-out unit (16), the left scraper blade lifting cylinder (19) is connected with the left scraper blade lifting unit (15), the right scraper blade lifting cylinder (20) is connected with the right scraper blade lifting unit (14), and the bulldozer plate cylinder (21) is connected with the bulldozer plate unit (13).
7. The hydraulically controlled grader hydraulic system of claim 6, wherein: the hydraulic control multi-way valve (4) further comprises a first oil supplementing overflow valve (5) and a second oil supplementing overflow valve (24), wherein the first oil supplementing overflow valve (5) is arranged between the shovel angle conversion oil cylinder (17) and the oil port T1, and the second oil supplementing overflow valve (24) is arranged between the bulldozer plate oil cylinder (21) and the oil port T1.
8. A hydraulically controlled grader hydraulic system as in any one of claims 1-3 wherein: the working pump (1) is a load-sensitive variable pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223569528.XU CN219298298U (en) | 2022-12-27 | 2022-12-27 | Hydraulic system of hydraulic control land leveler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223569528.XU CN219298298U (en) | 2022-12-27 | 2022-12-27 | Hydraulic system of hydraulic control land leveler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219298298U true CN219298298U (en) | 2023-07-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223569528.XU Active CN219298298U (en) | 2022-12-27 | 2022-12-27 | Hydraulic system of hydraulic control land leveler |
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| Country | Link |
|---|---|
| CN (1) | CN219298298U (en) |
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2022
- 2022-12-27 CN CN202223569528.XU patent/CN219298298U/en active Active
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