CN219754918U - Arm support hydraulic system and concrete pump truck - Google Patents
Arm support hydraulic system and concrete pump truck Download PDFInfo
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- CN219754918U CN219754918U CN202320173824.3U CN202320173824U CN219754918U CN 219754918 U CN219754918 U CN 219754918U CN 202320173824 U CN202320173824 U CN 202320173824U CN 219754918 U CN219754918 U CN 219754918U
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- hydraulic
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- 238000006073 displacement reaction Methods 0.000 claims abstract description 33
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 52
- 239000010720 hydraulic oil Substances 0.000 description 4
- 239000013589 supplement Substances 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 230000001502 supplementing effect Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model relates to the field of hydraulic control, and provides a boom hydraulic system and a concrete pump truck, wherein the boom hydraulic system comprises: the hydraulic pump, the energy accumulator, the control valve, the hydraulic cylinder and the controller, wherein the hydraulic cylinder is provided with a displacement sensor which is electrically connected with the controller; the energy accumulator is arranged on a bypass of the main oil way; the control valve is arranged between the main oil way and the energy accumulator and is electrically connected with the controller. The arm support hydraulic system provided by the utility model detects the displacement value of the hydraulic cylinder through the displacement sensor and sends the displacement value to the controller, and the controller controls the switch of the control valve based on the displacement value, so that when the arm support is pre-dropped, the energy is timely supplemented through the energy accumulator, thereby reducing the energy consumption of the arm support hydraulic system and avoiding the risk of arm drop.
Description
Technical Field
The utility model relates to the technical field of hydraulic control, in particular to a boom hydraulic system and a concrete pump truck.
Background
At present, the working machinery is mostly provided with a boom structure, such as a concrete pump truck, the length of the boom is long, a hydraulic system for controlling the boom has a leakage phenomenon, and in a long-time lifting state, the inching of an actuating mechanism (such as a hydraulic cylinder) can generate a more obvious boom falling phenomenon through the amplification effect of the boom, so that a certain potential safety hazard exists.
Disclosure of Invention
The utility model provides a boom hydraulic system and a concrete pump truck, which are used for solving the defect that a long boom in the prior art has a boom falling phenomenon in the long-time lifting process.
The utility model provides a boom hydraulic system, comprising:
a hydraulic pump;
a controller;
the hydraulic cylinder is connected with the hydraulic pump through a main oil way, and is provided with a displacement sensor which is electrically connected with the controller;
the oil port of the energy accumulator is connected with the main oil way;
the control valve is arranged between the main oil way and the energy accumulator and is electrically connected with the controller.
The arm support hydraulic system provided by the utility model further comprises a pressure sensor group, wherein the pressure sensor group is connected with a cavity of the hydraulic cylinder, and the pressure sensor group is electrically connected with the controller.
According to the boom hydraulic system provided by the utility model, the pressure sensor group comprises a first pressure sensor and a second pressure sensor, the first pressure sensor is connected with a rod cavity of the hydraulic cylinder, and the second pressure sensor is connected with a rodless cavity of the hydraulic cylinder.
The arm support hydraulic system provided by the utility model further comprises a third pressure sensor, wherein the third pressure sensor is connected with the energy accumulator, and the third pressure sensor is electrically connected with the controller.
The arm support hydraulic system provided by the utility model further comprises an overflow valve, wherein an oil inlet of the overflow valve is connected between the control valve and the main oil way, and an oil outlet of the overflow valve is connected with an oil tank of the arm support hydraulic system.
According to the arm support hydraulic system provided by the utility model, the control valve is a two-position two-way electromagnetic directional valve.
The arm support hydraulic system provided by the utility model further comprises a multi-way valve group, wherein the multi-way valve group is connected between the hydraulic cylinder and the hydraulic pump, and the multi-way valve group is electrically connected with the controller.
The boom hydraulic system provided by the utility model further comprises a balance valve, wherein the balance valve is connected between the multi-way valve group and the hydraulic cylinder;
the balance valve is connected with the rod cavity and the rodless cavity of the hydraulic cylinder respectively.
The boom hydraulic system provided by the utility model further comprises a filter, wherein the filter is arranged between the hydraulic pump and the main oil way.
The utility model also provides a concrete pump truck, which comprises the arm support hydraulic system.
According to the arm support hydraulic system provided by the utility model, the energy accumulator is arranged on the bypass of the main oil way, the displacement sensor detects the displacement value of the hydraulic cylinder and sends the displacement value to the controller, and the controller controls the switch of the control valve based on the displacement value, so that when the arm support where the hydraulic cylinder is positioned is pre-dropped in a state that the hydraulic pump stops working, the energy accumulator is used for timely supplementing energy, thereby reducing the energy consumption of the arm support hydraulic system and avoiding the risk of dropping the arm.
Further, the concrete pump truck provided by the utility model has the advantages as described above due to the fact that the boom hydraulic system is provided.
Drawings
In order to more clearly illustrate the utility model or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a boom hydraulic system provided by the utility model.
Reference numerals:
100: a hydraulic pump; 101: an oil tank; 102: a main oil path; 103: an overflow valve; 104: a filter; 105: a one-way valve; 200: an accumulator; 201: a control valve; 202: a third pressure sensor; 300: arm support control loop; 301: a multi-way valve group; 302: a balancing valve; 303: a hydraulic cylinder; 304: a displacement sensor; 305: a first pressure sensor; 306: and a second pressure sensor.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the embodiments of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., are based on directions or positional relationships shown in the drawings, are merely for convenience of describing the embodiments of 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 direction, be configured and operated in a specific direction, and thus should not be construed as limiting the embodiments of the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In describing embodiments of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the terms "coupled," "coupled," and "connected" should be construed broadly, and may be either a fixed connection, a removable connection, or an integral connection, 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 embodiments of the present utility model will be understood in detail by those of ordinary skill in the art.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the embodiments of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
An embodiment of the present utility model is described below with reference to fig. 1. It is to be understood that the following are only illustrative embodiments of the present utility model and are not to be construed as limiting the utility model.
As shown in fig. 1, the present utility model provides a boom hydraulic system, comprising: the hydraulic pump 100, the boom control loop 300, the energy accumulator 200 and the control valve 201 are connected with the boom control loop 300 and the hydraulic pump 100 through a main oil way 102, the boom control loop 300 comprises a hydraulic cylinder 303 and a controller (not shown in the figure), in other words, the hydraulic cylinder 303 is connected with the hydraulic pump 100 through the main oil way 102, the hydraulic cylinder 303 is provided with a displacement sensor 304, and the displacement sensor 304 is electrically connected with the controller; the oil port of the accumulator 200 is connected with the oil circuit 102, namely the accumulator 200 is arranged on a bypass of the main oil circuit 102; a control valve 201 is provided between the main oil passage 102 and the accumulator 200, and the control valve 201 is electrically connected to the controller.
In addition, a check valve 105 is arranged on the main oil path 102, an oil inlet of the check valve 105 is connected with the boom control loop 300 and the accumulator 200, and an oil outlet of the check valve 105 is connected with the hydraulic pump 100 to prevent hydraulic oil flowing out of the accumulator 200 from entering the hydraulic pump 100.
In other words, the hydraulic oil of the hydraulic pump 100 is output and then reaches the bypass where the accumulator 200 is located and the hydraulic cylinder 303 of the boom control circuit 300 through the main oil path 102, and in a state where the control valve 201 is opened, the hydraulic pump 100 charges the accumulator 200 and supplies oil to the hydraulic cylinder 303; in a state where the control valve 201 is closed, the hydraulic pump 100 supplies oil to the hydraulic cylinder 303. In the long-time lifting process of the boom controlled by the hydraulic cylinder 303, for example, 30 minutes or more, in order to reduce energy consumption, the engine is in a flameout state, so that the hydraulic pump 100 stops working, and the boom hydraulic system is in a pressure maintaining state. However, because the hydraulic elements of the boom hydraulic system have different degrees of leakage, after the long boom is amplified, the long boom generally falls in the range of 20 meters to 100 meters, and obvious boom falling phenomenon can occur. At this time, the displacement sensor 304 of the hydraulic cylinder 303 detects the movement of the telescopic rod of the hydraulic cylinder 303 with arm dropping tendency, and then feeds back to the controller, the controller controls the control valve 201 to be opened, the accumulator 200 releases high-pressure oil, timely energy supplementing is performed on the hydraulic cylinder 303, the amplitude of arm dropping is reduced, the arm support is timely restored to the initial height, and accidents are avoided.
In addition, under the other working condition of the utility model, the arm support is uneven in action height, most of working requirements are slow and stable in action, and part of working conditions are fast in multi-arm linkage. Typically, to achieve both functional and cost-effective performance, boom hydraulic systems will select a smaller displacement hydraulic pump 100, such as 55 displacement. But the small displacement hydraulic pump 100 cannot meet the demand when the multi-boom linkage or the fast-acting demand is present; however, increasing the displacement of the hydraulic pump 100 increases the cost, and wastes the displacement and increases the oil consumption when the boom performs a slow motion most of the time.
Therefore, when the small-displacement hydraulic pump 100 is selected, the accumulator 200 is provided as a power supplement to the hydraulic pump 100 in the bypass. During slow motion, the accumulator 200 closes the control valve 201 after charging; when the multi-arm frame is linked or the arm frame moves quickly, the control valve 201 of the energy accumulator 200 is opened, and the energy accumulator works together with the hydraulic pump 100 to release high-pressure oil as the supplement of the arm frame oil. The boom moves fast, corresponding to a 100% displacement of the lifting hydraulic pump, and the control valve 201 is closed when the accumulator 200 is under-pressurized. When the arm support does not frequently run at a high speed, the requirements of working conditions can be basically met, and the operability is improved.
Further, in one embodiment of the present utility model, the control valve 201 is a two-position two-way electromagnetic directional valve. The control valve 201 includes a first working position in which the accumulator 200 is in communication with the main oil passage 102, and a second working position in which the accumulator 200 is disconnected from the main oil passage 102 and the accumulator 200 is in a pressure maintaining state, and in which the accumulator 200 can supply high-pressure oil to the hydraulic cylinder 303 and the hydraulic pump 100 can charge the accumulator 200.
Further, the control valve 201 includes a first oil port and a second oil port, the first oil port is connected to the accumulator 200, the second oil port is connected to the main oil path 102, the first oil port is connected to the second oil port in the first working position, and the first oil port is disconnected from the second oil port in the second working position. In addition, when the control valve 201 is an electromagnetic valve, the electromagnetic control end is connected with the controller, and the controller can control the opening degree of the control valve 201, so that the opening degree of the control valve 201 is controlled based on the condition of oil required by the boom control loop 300, and the output speed of high-pressure oil of the accumulator 200 is controlled.
Specifically, in another embodiment of the present utility model, boom control circuit 300 further includes a pressure sensor set coupled to the chamber of hydraulic cylinder 303, the pressure sensor set being electrically coupled to the controller.
That is, the hydraulic cylinder 303 is detected by the pressure sensor group and the displacement sensor 304 at the same time, and then the arm drop condition is accurately judged. When the telescopic rod of the hydraulic cylinder 303 is displaced, the pressure of the chamber of the hydraulic cylinder 303 is necessarily changed, but when the pressure of the chamber of the hydraulic cylinder 303 is changed, the displacement of the telescopic rod is not necessarily changed, that is, the arm is not necessarily dropped when the pressure is changed, and the simultaneous detection of the pressure and the displacement is helpful to improve the detection precision and avoid misoperation.
The value detected by the pressure sensor group is fed back to the controller, the value detected by the displacement sensor 304 is also fed back to the controller, and the controller combines the pressure value and the displacement value to comprehensively judge and then control the control valve 201.
Specifically, in an alternative embodiment of the present utility model, the pressure sensor set includes a first pressure sensor 305 and a second pressure sensor 306, the first pressure sensor 305 being connected to the rod cavity of the hydraulic cylinder 303 and the second pressure sensor 306 being connected to the rod-less cavity of the hydraulic cylinder 303. That is, the first pressure sensor 305 and the second pressure sensor 306 are both connected to the controller, and control of the control valve 201 is performed based on the comprehensive judgment of the pressure values of the rod chamber and the rodless chamber of the hydraulic cylinder 303.
With continued reference to FIG. 1, in another alternative embodiment of the utility model, the boom hydraulic system further includes a third pressure sensor 202, the third pressure sensor 202 being coupled to the accumulator 200, the third pressure sensor 202 being electrically coupled to the controller.
In other words, the third pressure sensor 202 feeds back the pressure state of the accumulator 200 to the controller, which opens the hydraulic pump 100 and the control valve 201 to charge the accumulator 200 based on the operating condition when the oil pressure of the accumulator 200 is low. When the accumulator 200 supplements the boom control circuit 300, the controller receives the signal of the third pressure sensor 202, and when the oil pressure of the accumulator 200 is judged to be low, the control valve 201 is controlled to be closed, and the energy supplement is stopped.
In some embodiments of the present utility model, the boom hydraulic system further comprises a relief valve 103, an oil inlet of the relief valve 103 is connected between the control valve 201 and the main oil path 102, and an oil outlet of the relief valve 103 is connected with the oil tank 101 of the boom hydraulic system. That is, the relief valve 103 provides relief protection for the boom hydraulic system.
Furthermore, in other embodiments of the present utility model, boom control circuit 300 further includes a multiple-way valve block 301, where multiple-way valve block 301 is connected between hydraulic cylinder 303 and hydraulic pump 100, and where multiple-way valve block 301 is electrically connected to a controller.
Wherein, based on the detection values of the displacement sensor 304 and the pressure sensor group, the controller controls the opening time of the control valve 201 and the opening degree of the multiple valve group 301.
In an alternative embodiment of the utility model, boom control circuit 300 further comprises a balancing valve 302, balancing valve 302 being connected between multiplex valve block 301 and hydraulic cylinder 303; wherein the balancing valve 302 is connected to the rod and rodless chambers of the hydraulic cylinder 303, respectively. For example, the balance valve 302 is adopted in the pump truck, so that the oil cylinder can be effectively kept at the non-working moment, and the telescopic rod is static, namely the cylinder is locked; the oil cylinder is stabilized to act, so that the impact is reduced; overpressure overflow and protection; and also plays a certain role in buffering.
Wherein in another alternative embodiment of the utility model, the boom hydraulic system further comprises a filter 104, the filter 104 being arranged between the hydraulic pump 100 and the main oil line 102. That is, the filter 104 filters the hydraulic oil output from the hydraulic pump 100 to reduce impurities of the hydraulic oil that enters the boom control circuit 300 and the accumulator 200. Wherein in an embodiment of the present utility model, the hydraulic pump 100 may be a load-sensitive pump.
The utility model also provides a concrete pump truck, which comprises the boom hydraulic system of the embodiment.
According to the arm support hydraulic system provided by the utility model, the energy accumulator 200 is arranged on the bypass of the main oil way 102, the displacement sensor 304 detects the displacement value of the hydraulic cylinder 303 and sends the displacement value to the controller, and the controller controls the switch of the control valve 201 based on the displacement value, so that when the arm support where the hydraulic cylinder 303 is positioned is pre-dropped in the state that the hydraulic pump 100 stops working, the energy accumulator 200 is used for timely energy supplementing, thereby reducing the energy consumption of the arm support hydraulic system and avoiding the risk of arm dropping.
Further, the concrete pump truck provided by the utility model has the advantages as described above due to the fact that the boom hydraulic system is provided.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims (10)
1. A boom hydraulic system, comprising:
a hydraulic pump (100);
a controller;
the hydraulic cylinder (303), the hydraulic cylinder (303) is connected with the hydraulic pump (100) through a main oil way (102), the hydraulic cylinder (303) is provided with a displacement sensor (304), and the displacement sensor (304) is electrically connected with the controller;
the oil port of the energy accumulator (200) is connected with the main oil way (102);
and a control valve (201), wherein the control valve (201) is arranged between the main oil path (102) and the accumulator (200), and the control valve (201) is electrically connected with the controller.
2. Boom hydraulic system according to claim 1, further comprising a pressure sensor group connected to the chamber of the hydraulic cylinder (303), the pressure sensor group being electrically connected to the controller.
3. Boom hydraulic system according to claim 2, characterized in that the pressure sensor group comprises a first pressure sensor (305) and a second pressure sensor (306), the first pressure sensor (305) being connected to the rod-fed chamber of the hydraulic cylinder (303), the second pressure sensor (306) being connected to the rod-less chamber of the hydraulic cylinder (303).
4. The boom hydraulic system of claim 1, further comprising a third pressure sensor (202), the third pressure sensor (202) being connected to the accumulator (200), the third pressure sensor (202) being electrically connected to the controller.
5. The boom hydraulic system according to claim 1, further comprising a relief valve (103), wherein an oil inlet of the relief valve (103) is connected between the control valve (201) and the main oil circuit (102), and an oil outlet of the relief valve (103) is connected with an oil tank (101) of the boom hydraulic system.
6. Boom hydraulic system according to claim 1, characterized in that the control valve (201) is a two-position two-way electromagnetic directional valve.
7. Boom hydraulic system according to any of claims 1-6, further comprising a multiple valve block (301), said multiple valve block (301) being connected between said hydraulic cylinder (303) and said hydraulic pump (100), said multiple valve block (301) being electrically connected with said controller.
8. The boom hydraulic system of claim 7, further comprising a balancing valve (302), the balancing valve (302) being connected between the multiple way valve block (301) and the hydraulic cylinder (303);
wherein the balance valve (302) is respectively connected with a rod cavity and a rodless cavity of the hydraulic cylinder (303).
9. The boom hydraulic system of claim 1, further comprising a filter (104), the filter (104) being disposed between the hydraulic pump (100) and the main oil circuit (102).
10. A concrete pump truck comprising the boom hydraulic system of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320173824.3U CN219754918U (en) | 2023-01-30 | 2023-01-30 | Arm support hydraulic system and concrete pump truck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320173824.3U CN219754918U (en) | 2023-01-30 | 2023-01-30 | Arm support hydraulic system and concrete pump truck |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219754918U true CN219754918U (en) | 2023-09-26 |
Family
ID=88073506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320173824.3U Active CN219754918U (en) | 2023-01-30 | 2023-01-30 | Arm support hydraulic system and concrete pump truck |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219754918U (en) |
-
2023
- 2023-01-30 CN CN202320173824.3U patent/CN219754918U/en active Active
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