CN220910116U - Converging lifting system and mining dump truck - Google Patents
Converging lifting system and mining dump truck Download PDFInfo
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- CN220910116U CN220910116U CN202322650817.0U CN202322650817U CN220910116U CN 220910116 U CN220910116 U CN 220910116U CN 202322650817 U CN202322650817 U CN 202322650817U CN 220910116 U CN220910116 U CN 220910116U
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- 238000005065 mining Methods 0.000 title claims abstract description 20
- 239000010720 hydraulic oil Substances 0.000 claims description 35
- 239000003921 oil Substances 0.000 claims description 20
- 239000010727 cylinder oil Substances 0.000 claims description 2
- 239000010729 system oil Substances 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
The utility model discloses a confluence lifting system and a mining dump truck, comprising a steering plunger pump, a confluence valve, a logic valve, a lifting gear pump and a lifting valve; one end of the steering plunger pump is communicated with the oil tank, and the other end of the steering plunger pump is communicated with the steering hydraulic system; one end of the converging valve is communicated with the oil tank; one end of the logic valve is communicated with the steering hydraulic system, the other end of the logic valve is communicated with the lifting cylinder, the logic valve is electrically connected with the converging valve, and when the converging valve is electrified, the logic valve is opened; one end of the lifting gear pump is communicated with the oil tank; one end of the lifting valve is communicated with the lifting cylinder, and the other end of the lifting valve is communicated with the lifting gear pump through the one-way valve. According to the utility model, the lifting performance of the mining dump truck is improved by the plunger pump of the steering system, the lifting time is shortened under the condition of not changing the lifting gear pump, and the working pressure of the lifting system is improved.
Description
Technical Field
The utility model relates to a confluence lifting system, and belongs to the field of mining machinery.
Background
The load capacity of the mining dump truck is large and is generally more than 100 tons, a cargo box needs to be lifted through a lifting oil cylinder when the mining dump truck is lifted, a lifting system of the mining dump truck generally adopts a large-displacement gear pump at present, the rated pressure of the gear pump determines the working pressure of the lifting system, the displacement of the gear pump determines the lifting time, but the mining dump truck is limited by the structure of the gear pump, the rated pressure of the gear pump is lower, the load demand of the mining dump truck cannot be met, and a hydraulic lifting technical scheme capable of breaking through the pressure and displacement limitation of the gear pump is needed.
Disclosure of Invention
The utility model aims to provide a confluence lifting system, which improves the lifting performance of a mining dump truck by using a plunger pump of a steering system, shortens the lifting time under the condition of not changing a lifting gear pump and improves the working pressure of the lifting system.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
In a first aspect, the present utility model discloses a confluence lifting system, comprising:
One end of the steering plunger pump is communicated with the oil tank, and the other end of the steering plunger pump is communicated with the steering hydraulic system;
a confluence valve, one end of which is communicated with the oil tank;
One end of the logic valve is communicated with the steering hydraulic system, the other end of the logic valve is communicated with the lifting cylinder, the logic valve is electrically connected with the converging valve, and when the converging valve is electrified, the logic valve is opened;
one end of the lifting gear pump is communicated with the oil tank;
And one end of the lifting valve is communicated with the lifting cylinder, and the other end of the lifting valve is communicated with the lifting gear pump through the one-way valve.
In some embodiments, an overflow valve is connected in parallel with the oil path of the lifting gear pump, and the set pressure of the overflow valve is lower than the rated working pressure of the lifting gear pump.
In some embodiments, the steering plunger pump is a constant pressure variable pump, and the set pressure of the steering plunger pump is higher than the set pressure of the relief valve.
In some embodiments, the lifting valve is a four-position six-way reversing valve, and the four lifting gears respectively correspond to the descending, holding, floating and lifting of the vehicle from left to right.
In some embodiments, when the lifting valve is in the lifting gear, the converging valve is powered, and hydraulic oil output by the steering plunger pump and hydraulic oil output by the lifting gear pump can be converged and simultaneously input into the rodless cavity of the lifting cylinder.
In some embodiments, when the lifting valve is in a floating or holding gear, the converging valve is not powered, the logic valve is in a closed state, hydraulic oil output by the steering plunger pump is all supplied to the steering hydraulic system, and hydraulic oil output by the lifting gear pump directly flows back to the oil tank through the floating or holding gear.
In some embodiments, when the lifting valve is in the down shift position, the converging valve is not powered, the logic valve is in a closed state, hydraulic oil output by the steering plunger pump is all supplied to the steering hydraulic system, hydraulic oil output by the lifting gear pump passes through the one-way valve, and the down shift flow of the lifting valve flows to the rod cavity of the lifting cylinder.
In some embodiments, the logic valve is in communication with the rodless chamber of the lift cylinder, and hydraulic oil for the steering plunger pump flows through the logic valve to the rodless chamber of the lift cylinder.
In a second aspect, the utility model discloses a mining dump truck, which comprises a lifting oil cylinder, wherein the lifting oil cylinder is provided with the confluence lifting system.
Compared with the prior art, the utility model has the beneficial effects that:
1. The steering plunger pump is converged to improve the highest pressure of the lifting system, so that the load of the mining dump truck can be improved.
2. And the flow of the lifting system is improved by converging the steering plunger pump, so that the lifting time of a container is shortened.
3. The converging valve and the lifting valve are controlled in a linkage way by electromagnetic valves, and compared with a hydraulic control valve, the converging valve and the lifting valve are simple in element arrangement and convenient to operate.
4. The lifting gear pump and the steering plunger pump do not need to be replaced with new types, the design period is short, and the realization cost is low.
5. The same working pressure and flow rate are realized, and the double-pump converging scheme is easier to select than the single gear pump scheme.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. It is evident that the drawings in the following description are only examples, from which other drawings can be obtained by a person skilled in the art without the inventive effort.
In the drawings:
Fig. 1 is a hydraulic schematic diagram of a confluence lifting system of the present utility model.
The attached drawings are identified: 1. logic valve 2, confluence valve, 3, steering plunger pump, 4, lifting cylinder, 5, lifting valve, 6, one-way valve, 7, overflow valve, 8, lifting gear pump, 9, steering hydraulic system.
It should be noted that these drawings and the written description are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept to those skilled in the art by referring to the specific embodiments.
Description of the embodiments
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions in the embodiments will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model, and the following embodiments are used to illustrate the present utility model, but are not intended to limit the scope of the present utility model.
In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
According to the working condition characteristics that the lifting and steering of the mining dump truck do not work simultaneously, the rated pressure of a plunger pump used by the steering system is far higher than the rated pressure of a gear pump of the lifting system, and by adding a hydraulic loop in the steering system and the lifting system of the mining dump truck, when the mining dump truck lifts, a lifting valve and a converging valve work simultaneously, so that the steering plunger pump and the lifting gear pump realize converging when the mining dump truck lifts, and the pressure oil of the steering plunger pump and the lifting gear pump is simultaneously supplied to a lifting oil cylinder.
A preferred embodiment of the above confluence lifting is given below:
As shown in fig. 1, the converging and lifting system comprises a steering plunger pump 3, a converging valve 2, a logic valve 1, a lifting gear pump 8, a lifting valve 5 and an overflow valve 7, wherein one end of the steering plunger pump 3 is communicated with an oil tank, and the other end of the steering plunger pump is communicated with a steering hydraulic system 9; one end of the converging valve 2 is communicated with an oil tank; one end of the logic valve 1 is communicated with the steering hydraulic system 9, the other end of the logic valve 1 is communicated with the lifting cylinder 4, the logic valve 1 is electrically connected with the converging valve 2, and when the converging valve 2 is powered on, the logic valve 1 is opened; one end of the lifting gear pump 8 is communicated with the oil tank; one end of the lifting valve 5 is communicated with the lifting cylinder 4, the other end of the lifting valve is communicated with the lifting gear pump 8 through the one-way valve 6, an overflow valve 7 is connected in parallel in an oil way of the lifting gear pump 8, and the set pressure of the overflow valve 7 is lower than the rated working pressure of the lifting gear pump 8.
The specific working process is as follows: the overflow valve 7 is a safety valve of the lifting gear pump 8, and in order to prevent the gear pump from being damaged due to the fact that the output pressure of the lifting gear pump 8 exceeds the rated pressure, the set pressure of the overflow valve 7 is slightly lower than the rated working pressure of the lifting gear pump 8. The lifting valve 5 is a four-position six-way reversing valve, and four positions correspond to four lifting gears of the mining dump truck from left to right respectively: the converging valve 2 can be powered on simultaneously only when the lifting valve 5 is in the lifting gear, and the converging valve 2 cannot be powered on under other working conditions. The steering plunger pump 3 is a constant-pressure variable pump, the set pressure of the steering plunger pump 3 is higher than the set pressure of the overflow valve 7, and when the confluence valve 2 is not electrified, namely when the lifting valve 5 is in a non-lifting gear, the maximum flow required by the steering hydraulic system 9 is smaller than the maximum flow of the steering plunger pump 3, and the pressure of the steering plunger pump 3 is constant at the set pressure; when the confluence valve 2 is powered on, hydraulic oil of the steering plunger pump 3 flows to the rodless cavity of the lifting cylinder 4 through the logic valve 1, and at the moment, the required flow of the lifting cylinder 4 is far greater than the maximum flow of the steering plunger pump 3, so that the actual output pressure of the steering plunger pump 3 depends on the load capacity of the dump truck at the moment, and the set constant pressure cannot be maintained.
When the lifting valve 5 is in a floating or retaining gear, the converging valve 2 is not electrified, and the logic valve 1 is in a closed state because the converging valve 2 is not electrified, and all hydraulic oil output by the steering plunger pump 3 is supplied to the steering hydraulic system 9; the hydraulic oil output by the lifting gear pump 8 is directly returned to the hydraulic oil tank through a floating or retaining gear, and the lifting gear pump 8 is in a low-pressure working state at the moment.
When the lifting valve 5 is in a lifting gear, the converging valve 2 is powered on, the logic valve 1 is started, pressure oil output by the steering plunger pump 3 enters a rodless cavity of the lifting cylinder 4, at the moment, hydraulic oil output by the lifting gear pump 8 is divided into two cases, namely, a container does not reach a rated load, working pressure required by the lifting cylinder 4 is lower than set pressure of the overflow valve 7, and the overflow valve 7 is in a closed state, so that the pressure output by the steering plunger pump 3 and the lifting gear pump 8 is the same at the moment, the hydraulic oil output by the lifting gear pump 8 enters a rodless cavity of the lifting cylinder 4 through the one-way valve 6 and the lifting gear of the lifting valve 5, so that the hydraulic oil output by the steering plunger pump 3 and the hydraulic oil output by the lifting gear pump 8 are converged, meanwhile, the rodless cavity of the lifting cylinder 4 is input, and a piston rod of the lifting cylinder 4 extends under the action of the hydraulic oil, so that lifting of the container is realized; the other working condition is that the cargo box reaches the rated load, the working pressure required by the lifting cylinder 4 is higher than the set pressure of the overflow valve 7, at the moment, the output pressure of the steering plunger pump 3 is higher than the output pressure of the lifting gear pump 8, under the action of high-pressure hydraulic oil of the steering plunger pump 3, the one-way valve 6 is in a closed state, the hydraulic oil output by the lifting gear pump 8 reaches the set value of the overflow valve 7 to open the overflow valve 7 and return to the hydraulic oil tank, as the cargo box ascends, the cargo in the cargo box continuously reduces, the working pressure required by the lifting cylinder 4 continuously reduces as the cargo box ascends, when the working pressure of the lifting cylinder 4 reduces below the set pressure of the overflow valve 7, the output pressure of the steering plunger pump 3 and the lifting gear pump 8 is the same, the one-way valve 6 is opened, the hydraulic oil output by the lifting gear pump 8 enters a rodless cavity of the lifting cylinder 4 through the one-way valve 6 and the lifting gear of the lifting gear pump 5, so far, the hydraulic oil output by the steering plunger pump 3 and the hydraulic oil output by the lifting gear pump 8 are converged, and simultaneously the hydraulic oil input into the rodless cavity of the lifting cylinder 4, and the lifting cylinder 4 stretches out under the action of the hydraulic oil, so that lifting of the cargo box is realized.
When the lifting valve 5 is in a down shift position, the converging valve 2 is not electrified, and the logic valve 1 is in a closed state because the converging valve 2 is not electrified, and all hydraulic oil output by the steering plunger pump 3 is supplied to the steering hydraulic system 9; when the container descends, due to the effect of the self weight of the container, the working pressure required by the lifting cylinder 4 is lower than the set pressure of the overflow valve 7, hydraulic oil output by the lifting gear pump 8 passes through the one-way valve 6, the descending gear flow of the lifting valve 5 flows to the rod cavity of the lifting cylinder 4, and the piston rod of the lifting cylinder 4 retracts under the effect of the hydraulic oil, so that the container descends.
In conclusion, as the rated pressure of the steering plunger pump is higher than the rated pressure of the Yu Ju liters gear pump, the pressure limit of the lifting gear pump to the lifting system is broken through, so that the working pressure of the lifting system is improved on the premise of not changing the gear pump, and the rated load of the mining dump truck is improved; on the other hand, when lifting, the steering plunger pump and the lifting gear pump simultaneously supply hydraulic oil to the lifting system, and the flow of the lifting system is improved through double-pump confluence, so that the lifting time is shortened.
In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the utility model may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features contained in other embodiments, but not others, combinations of features of different embodiments are equally meant to be within the scope of the utility model and form different embodiments. For example, in the above embodiments, those skilled in the art can use the above embodiments in combination according to known technical solutions and technical problems to be solved by the present utility model.
The foregoing description is only illustrative of the preferred embodiment of the present utility model, and is not to be construed as limiting the utility model, but is to be construed as limiting the utility model to any simple modification, equivalent variation and variation of the above embodiments according to the technical matter of the present utility model without departing from the scope of the utility model.
Claims (9)
1. A confluence lifting system, comprising:
One end of the steering plunger pump is communicated with the oil tank, and the other end of the steering plunger pump is communicated with the steering hydraulic system;
a confluence valve, one end of which is communicated with the oil tank;
One end of the logic valve is communicated with the steering hydraulic system, the other end of the logic valve is communicated with the lifting cylinder, the logic valve is electrically connected with the converging valve, and when the converging valve is electrified, the logic valve is opened;
one end of the lifting gear pump is communicated with the oil tank;
And one end of the lifting valve is communicated with the lifting cylinder, and the other end of the lifting valve is communicated with the lifting gear pump through the one-way valve.
2. A confluence lifting system as defined in claim 1, wherein:
And an overflow valve is connected in parallel in an oil way of the lifting gear pump, and the set pressure of the overflow valve is lower than the rated working pressure of the lifting gear pump.
3. A confluence lifting system as defined in claim 2, wherein:
The steering plunger pump is a constant pressure variable pump, and the set pressure of the steering plunger pump is higher than the set pressure of the overflow valve.
4. A confluence lifting system as defined in claim 1, wherein:
The lifting valve is a four-position six-way reversing valve, and corresponds to four lifting gears of descending, holding, floating and lifting of the vehicle from left to right.
5. The confluent lifting system as recited in claim 4, wherein:
When the lifting valve is in a lifting gear, the converging valve is powered on, and hydraulic oil output by the steering plunger pump and hydraulic oil output by the lifting gear pump can be converged and input into the rodless cavity of the lifting cylinder.
6. The confluent lifting system as recited in claim 4, wherein:
When the lifting valve is in a floating or retaining gear, the converging valve is not electrified, the logic valve is in a closed state, hydraulic oil output by the steering plunger pump is completely supplied to the steering hydraulic system, and hydraulic oil output by the lifting gear pump directly flows back to the oil tank through the floating or retaining gear.
7. The confluent lifting system as recited in claim 4, wherein:
When the lifting valve is in a descending gear, the converging valve is not electrified, the logic valve is in a closed state, hydraulic oil output by the steering plunger pump is completely supplied to the steering hydraulic system, hydraulic oil output by the lifting gear pump passes through the one-way valve, and a descending gear flow of the lifting valve flows to a rod cavity of the lifting cylinder.
8. A confluence lifting system as defined in claim 1, wherein:
The logic valve is communicated with the rodless cavity of the lifting cylinder, and hydraulic oil of the steering plunger pump flows to the rodless cavity of the lifting cylinder through the logic valve.
9. The utility model provides a mining dump truck, includes lift cylinder, its characterized in that:
The lift cylinder is equipped with a confluent lift system as claimed in any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322650817.0U CN220910116U (en) | 2023-09-28 | 2023-09-28 | Converging lifting system and mining dump truck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322650817.0U CN220910116U (en) | 2023-09-28 | 2023-09-28 | Converging lifting system and mining dump truck |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220910116U true CN220910116U (en) | 2024-05-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322650817.0U Active CN220910116U (en) | 2023-09-28 | 2023-09-28 | Converging lifting system and mining dump truck |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220910116U (en) |
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2023
- 2023-09-28 CN CN202322650817.0U patent/CN220910116U/en active Active
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