Control valve group and dumper

Abstract

The invention provides a control valve group and a dumper, and relates to the technical field of dumpers. The control valve set comprises a shell, a lifting control oil way and a cooling control oil way, wherein the lifting control oil way and the cooling control oil way are arranged in the shell. Wherein the lifting control oil way is used for supplying oil to the hydraulic lifting system; the cooling control oil way is used for supplying oil to the hydraulic cooling system; the lifting control oil way is connected with the cooling control oil way, and the lifting control oil way and the cooling control oil way at least share one hydraulic pump. The invention can save space and reduce production cost.

Description

Technical Field

[0001] The present disclosure relates to the technical field of dump trucks, and in particular to a control valve group and a dump truck. Background Art

[0002] In the technical field of dump trucks, the oil cooling function of a dump truck is generally achieved through a hydraulic cooling system, and the driver achieves the oil cooling function of the dump truck through a cooling control button.

[0003] In the related art, the hydraulic cooling system is usually independently configured, which requires the separate matching of hydraulic pumps, control valves and other components, which results in an increase in hydraulic components, valve groups and pipelines, occupies a large space and increases costs.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0005] The purpose of the present disclosure is to overcome the above-mentioned deficiencies of the prior art and provide a control valve group and a dump truck to reduce costs.

[0006] According to one aspect of the present disclosure, there is provided a control valve group, comprising a housing and a lifting control oil circuit and a cooling control oil circuit disposed in the housing;

[0007] Wherein, the lifting control oil circuit is used to supply oil to the hydraulic lifting system;

[0008] The cooling control oil circuit is used to supply oil to the hydraulic cooling system;

[0009] The lifting control oil circuit is connected to the cooling control oil circuit, and the lifting control oil circuit and the cooling control oil circuit share at least one hydraulic pump.

[0010] In one embodiment of the present disclosure, the cooling control oil circuit includes a solenoid valve; the oil inlet of the solenoid valve, the first oil supply port provided on the housing, and the first node are connected to each other, the oil outlet of the solenoid valve, the hydraulic cooling port provided on the housing, and the second node are connected to each other, and the hydraulic cooling port and the oil inlet of the hydraulic cooling system are connected.

[0011] In one embodiment of the present disclosure, the hydraulic system other than the control valve group is provided with a temperature sensor for measuring the temperature of the hydraulic system;

[0012] The control valve group is configured to control the opening and closing of the solenoid valve according to a preset temperature value of the temperature sensor.

[0013] In one embodiment of the present disclosure, the lifting control oil circuit includes a first one-way valve, the oil inlet of the first one-way valve is connected to the first node, the oil outlet of the first one-way valve, the hydraulic lifting port arranged on the shell, and the third node are connected to each other, and the hydraulic lifting port is connected to the oil inlet of the hydraulic lifting system.

[0014] In one embodiment of the present disclosure, the opening pressure of the first one-way valve is greater than the opening pressure of the solenoid valve.

[0015] In one embodiment of the present disclosure, the lifting control oil circuit also includes a second one-way valve, the oil inlet of the second one-way valve, the second oil supply port arranged on the shell, and the fourth node are connected to each other, and the oil outlet of the second one-way valve is connected to the third node.

[0016] In one embodiment of the present disclosure, the lifting control oil circuit also includes a third one-way valve, the oil inlet of the third one-way valve, the third oil supply port arranged on the shell, and the fifth node are connected to each other, and the oil outlet of the third one-way valve is connected to the third node.

[0017] In one embodiment of the present disclosure, the housing is provided with a first pressure measuring port, a second pressure measuring port, a third pressure measuring port, and a fourth pressure measuring port for connecting a pressure sensor;

[0018] Among them, the first pressure measuring port is connected to the first node; the second pressure measuring port is connected to the fourth node; the third pressure measuring port is connected to the fifth node; and the fourth pressure measuring port is connected to the third node.

[0019] In one embodiment of the present disclosure, the housing is provided with a first measuring port, a second measuring port, a third measuring port, and a fourth measuring port for a pressure measuring device;

[0020] Among them, the first measurement port is connected to the first node; the second measurement port is connected to the fourth node; the third measurement port is connected to the second node; and the fourth measurement port is connected to the third node.

[0021] According to another aspect of the present disclosure, a dump truck is also provided, comprising the above-mentioned control valve group.

[0022] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the specification are used to explain the principles of the present disclosure. Obviously, the accompanying drawings described below are only some embodiments of the present disclosure, and for ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0024] Figure 1 Schematic diagram of the structure of a control valve group in one embodiment of the present disclosure.

[0025] Description of reference numerals:

[0026] 1. Hydraulic pump; 2. Hydraulic lifting system; 3. Hydraulic cooling system; 4. Housing; D1, first one-way valve; D2, second one-way valve; D3, third one-way valve; N1, first node; N2, second node; N3, third node; N4, fourth node; N5, fifth node; P1, first oil supply port; P2, second oil supply port; P3, third oil supply port; JS, hydraulic lifting port; LQ, hydraulic cooling port; MP1, first pressure measuring port; MP2, second pressure measuring port; MP3, third pressure measuring port; MP4, fourth pressure measuring port; M1, first measuring port; M2, second measuring port; M3, third measuring port; M4, fourth measuring port; EV, solenoid valve. DETAILED DESCRIPTION

[0027] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present disclosure will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted. In addition, the drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale.

[0028] Although relative terms such as "upper" and "lower" are used in this specification to describe the relative relationship of one component of the illustration to another component, these terms are used in this specification only for convenience, such as according to the orientation of the examples described in the drawings. It is understood that if the device of the illustration is turned upside down, the component described as "upper" will become the component "lower". When a structure is "on" other structures, it may mean that the structure is formed integrally on the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure through another structure.

[0029] The terms "a", "an", "the", "said" and "at least one" are used to indicate the presence of one or more elements / components / etc.; the terms "including" and "having" are used to express an open-ended inclusive meaning and mean that additional elements / components / etc. may exist in addition to the listed elements / components / etc.; the terms "first", "second" and "third" etc. are used merely as labels and are not intended to limit the quantity of their objects.

[0030] The disclosed embodiment provides a dump truck, which may be a mining dump truck or other types of dump trucks, which are not limited here and can be configured according to actual needs.

[0031] In the related art, the hydraulic cooling system is independently set up, and it has a control valve group and an oil pump that separately supply oil to the hydraulic cooling system. However, the parts and systems of the dump truck are complicated, and the hydraulic cooling system is not always used during the operation of the dump truck. Instead, it is started when the temperature of the hydraulic oil is high to cool the oil in the hydraulic system. As a result, the utilization rate of the oil pump and the control valve group in the hydraulic cooling system is low, the space occupancy rate is high, and the cost is increased.

[0032] In order to solve the above problems, in one embodiment of the present disclosure, see Figure 1 , the dump truck may include a hydraulic oil tank, a hydraulic pump 1, a hydraulic lifting system 2, a hydraulic cooling system 3 and a control valve group. Among them, the hydraulic oil tank is used to store oil, and the hydraulic oil tank is connected to the hydraulic pump 1; the hydraulic pump 1 is connected to the hydraulic oil tank and is used to transport the oil in the hydraulic oil tank to the control valve group. The control valve group is respectively connected to the hydraulic lifting system 2 and the hydraulic cooling system 3 to supply oil to the hydraulic lifting system 2 and the hydraulic cooling system 3 respectively. The hydraulic lifting system 2 is used for lifting the dump truck. For example, the hydraulic lifting system 2 can lift the compartment of the dump truck, so as to unload or pour the cargo from the compartment. The hydraulic cooling system 3 is used to cool the oil in the hydraulic system to maintain the stability of the hydraulic system and improve the safety performance of the hydraulic system. In this way, the dump truck uses an integrated control valve group to control the operation of the hydraulic lifting system 2 and the hydraulic cooling system 3. Compared with the method of using a single control valve group to control the hydraulic cooling system 3 in the related art, the utilization rate of the hydraulic pump 1 and the control valve group is improved, the number of hydraulic components is reduced, the space of the dump truck is saved, and the cost is reduced.

[0033] In the embodiment of the present disclosure, the hydraulic system may be a hydraulic lifting system 2, a hydraulic cooling system 3, a hydraulic braking system, a hydraulic steering system, and various systems that use hydraulic oil and hydraulic elements to implement the functions of the dump truck.

[0034] It should be noted that, in one embodiment of the present disclosure, the hydraulic oil tank, each hydraulic pump 1 , each valve, and each hydraulic system all have an oil inlet and an oil outlet.

[0035] In one embodiment of the present disclosure, the dump truck may further include a controller. The controller may control the opening and closing of the hydraulic pump 1 and each hydraulic element. For example, when it is necessary to supply oil to the control valve group, the controller may control the hydraulic pump 1 to deliver oil to the control valve group. For another example, when it is necessary to open a valve in the control valve group, the controller may control the opening of the valve.

[0036] In one embodiment of the present disclosure, the connection methods of the various hydraulic components include but are not limited to flange connection, groove connection, threaded connection, welding, clamping, and the like.

[0037] In one embodiment of the present disclosure, see Figure 1 The control valve group includes a housing 4 and a lifting control oil circuit and a cooling control oil circuit arranged in the housing 4. The lifting control oil circuit is used to supply oil to the hydraulic lifting system 2. The cooling control oil circuit is used to supply oil to the hydraulic cooling system 3. The lifting control oil circuit and the cooling control oil circuit are connected, and the lifting control oil circuit and the cooling control oil circuit share at least one hydraulic pump 1. In one example, the number of hydraulic pumps 1 that deliver oil to the control valve group can be two, one of which is shared by the lifting control oil circuit and the cooling control oil circuit, and the other hydraulic pump 1 can supply oil to the lifting control oil circuit but not to the cooling control oil circuit, so that the hydraulic lifting system 2 has enough power oil, thereby improving the reliability of the hydraulic lifting system 2. In another example, the number of hydraulic pumps 1 that deliver oil to the control valve group can be three, one of which is shared by the lifting control oil circuit and the cooling control oil circuit, and the other two hydraulic pumps 1 can supply oil to the lifting control oil circuit but not to the cooling control oil circuit, so that the hydraulic lifting system 2 has enough power oil, thereby further improving the reliability of the hydraulic lifting system 2. In other examples, the number of the hydraulic pumps 1 that deliver oil to the control valve group may be three, and the three hydraulic pumps 1 are shared by the lifting control oil circuit and the cooling control oil circuit.

[0038] In this way, the lifting control oil circuit and the cooling control oil circuit are integrated through a control valve group to control the operation of the hydraulic lifting system 2 and the hydraulic cooling system 3, and the lifting control oil circuit and the cooling control oil circuit share at least one hydraulic pump 1. Compared with the method of using a single control valve group to control the hydraulic cooling system 3 in the related art, the utilization rate of the hydraulic pump 1 and the control valve group is improved, the number of hydraulic components is reduced, the space of the dump truck is saved, the cost is reduced, and the economy of the product is improved.

[0039] In one embodiment of the present disclosure, see Figure 1, the cooling control oil circuit includes a solenoid valve EV. The oil inlet of the solenoid valve EV, the first oil supply port P1 provided on the housing 4, and the first node N1 are interconnected, the oil outlet of the solenoid valve EV, the hydraulic cooling port LQ provided on the housing 4, and the second node N2 are interconnected, and the hydraulic cooling port LQ and the oil inlet of the hydraulic cooling system 3 are connected. In this way, by opening the solenoid valve EV and the hydraulic pump 1, the oil flows into the hydraulic cooling system 3 after passing through the first oil supply port P1 and the hydraulic cooling port LQ in sequence, so that the hydraulic cooling system 3 cools down the oil of the entire hydraulic system. By closing the solenoid valve EV, the oil supply to the hydraulic cooling system 3 is cut off, so that the hydraulic system stops working.

[0040] In one embodiment of the present disclosure, a hydraulic system other than the control valve group is provided with a temperature sensor for measuring the temperature of the hydraulic system. For example, the temperature sensor can be provided on the hydraulic oil tank or on other hydraulic systems. The control valve group is configured to control the opening and closing of the solenoid valve EV according to the preset temperature value of the temperature sensor. Specifically, when the temperature of the oil detected by the temperature sensor is greater than its own preset temperature value, the temperature sensor can send a feedback signal to the solenoid valve EV, and the solenoid valve EV will be converted to a start state when receiving the feedback signal, thereby achieving the oil supply effect to the hydraulic cooling system 3. When the temperature of the oil detected by the temperature sensor does not exceed its own preset temperature value, the temperature sensor can send a feedback cut-off signal to the solenoid valve EV, and the solenoid valve EV will switch to a closed state when receiving the feedback cut-off signal, thereby not supplying oil to the hydraulic cooling system 3, so as to reduce the energy consumption and workload of the hydraulic system.

[0041] In one embodiment of the present disclosure, the preset temperature value of the temperature sensor may range from 60°C to 70°C. In one example, the preset temperature value is 60°C. In another example, the preset temperature value is 70°C. In other examples, the preset temperature value may be 61°C, 61.5°C, 65°C, 68°C, 77°C, and so on. In this way, the problem of failure of hydraulic components due to excessively high or low oil temperature of the hydraulic system can be avoided, thereby improving the reliability and safety of the hydraulic system.

[0042] In one embodiment of the present disclosure, see Figure 1 , the lifting control oil circuit includes a first one-way valve D1. The oil inlet of the first one-way valve D1 is connected to the first node N1, the oil outlet of the first one-way valve D1, the third node N3, and the hydraulic lifting port JS provided on the housing 4 are connected to each other, and the hydraulic lifting port JS is connected to the oil inlet of the hydraulic lifting system 2. In this way, the first one-way valve D1 can make the oil flow in one direction, reduce the pressure shock of the oil in the hydraulic system, protect the hydraulic pump 1 from reverse shock, and increase the service life of the hydraulic components.

[0043] In one embodiment of the present disclosure, the opening pressure of the first one-way valve D1 is greater than the opening pressure of the solenoid valve EV. For example, the opening pressure of the first one-way valve D1 is 0.2MPa, and the throttling pressure of the valve core of the solenoid valve EV is 0.15MPa. For another example, the opening pressure of the first one-way valve D1 is 0.5MPa, and the throttling pressure of the valve core of the solenoid valve EV is 0.48MPa. In this way, when the solenoid valve EV is opened, the oil delivered by the hydraulic pump 1 can flow out from the hydraulic cooling port LQ first to supply oil to the hydraulic cooling system 3, so that the hydraulic cooling system 3 can cool the oil of the hydraulic system in time to improve the stability of the hydraulic cooling system 3 during operation.

[0044] In one embodiment of the present disclosure, see Figure 1 , the lifting control oil circuit also includes a second one-way valve D2. The oil inlet of the second one-way valve D2, the second oil supply port P2 provided on the housing 4, and the fourth node N4 are connected to each other, and the oil outlet of the second one-way valve D2 is connected to the third node N3. In this way, the hydraulic lifting system 2 is supplied with oil through the first one-way valve D1 and the second one-way valve D2 respectively. On the one hand, when one of the first one-way valve D1 and the second one-way valve D2 fails, the other one can continue to supply oil to the hydraulic lifting system 2; on the other hand, the oil circuit where the first one-way valve D1 and the oil circuit where the second one-way valve D2 are located jointly supply oil to the hydraulic lifting system 2, which can improve the power of the hydraulic lifting system 2. In addition, the second one-way valve D2 can make the oil be transported in one direction, reduce the pressure shock of the oil in the hydraulic system, protect the hydraulic pump 1 from reverse shock, and improve the service life of the hydraulic components.

[0045] In one embodiment of the present disclosure, see Figure 1 , the lifting control oil circuit also includes a third one-way valve D3. The oil inlet of the third one-way valve D3, the third oil supply port P3 provided on the housing 4, and the fifth node N5 are connected to each other, and the oil outlet of the third one-way valve D3 is connected to the third node N3. In this way, the hydraulic lifting system 2 is supplied with oil through the first one-way valve D1, the second one-way valve D2, and the third one-way valve D3 respectively. On the one hand, when one or both of the first one-way valve D1, the second one-way valve D2, and the third one-way valve D3 fail, at least one of them can continue to supply oil to the hydraulic lifting system 2; on the other hand, the oil circuit where the first one-way valve D1, the second one-way valve D2, and the third one-way valve D3 are located work together to supply oil to the hydraulic lifting system 2, which can further improve the power of the hydraulic lifting system 2. In addition, the third one-way valve D3 can make the oil be transported in one direction, reduce the pressure shock of the oil in the hydraulic system, protect the hydraulic pump 1 from reverse shock, and improve the service life of the hydraulic components.

[0046] In one embodiment of the present disclosure, see Figure 1The housing 4 is provided with a first pressure measuring port MP1, a second pressure measuring port MP2, a third pressure measuring port MP3, and a fourth pressure measuring port MP4 for connecting the pressure sensor. Among them, the first pressure measuring port MP1 is connected to the first node N1 to detect the oil pressure of the first node N1; the second pressure measuring port MP2 is connected to the fourth node N4 to detect the oil pressure of the fourth node N4; the third pressure measuring port MP3 is connected to the fifth node N5 to detect the oil pressure of the fifth node N5; the fourth pressure measuring port MP4 is connected to the third node N3 to detect the oil pressure of the third node N3. On the one hand, the pressure sensor can be connected to the vehicle screen or dashboard of the dump truck to help the driver observe whether the hydraulic system is working normally. On the other hand, when the hydraulic system is debugged and the hydraulic system fault is diagnosed, the pressure sensor can be used for pressure monitoring.

[0047] In one embodiment of the present disclosure, see Figure 1 The housing 4 is provided with a first measuring port M1, a second measuring port M2, a third measuring port M3, and a fourth measuring port M4 for the pressure measuring device. The first measuring port M1 is connected to the first node N1 to monitor the pressure of the first node N1; the second measuring port M2 is connected to the fourth node N4 to monitor the pressure of the fourth node N4; the third measuring port M3 is connected to the second node N2 to monitor the pressure of the second node N2; the fourth measuring port M4 is connected to the third node N3 to monitor the pressure of the third node N3. In this way, when the pressure sensor is damaged, the pressure measuring device can be used to detect the pressure of each node, so as to monitor the oil pressure of each node.

[0048] In one embodiment of the present disclosure, the pressure measuring device may include but is not limited to a mechanical pressure gauge, an electronic pressure gauge, and a pressure measuring joint.

[0049] In one embodiment of the present disclosure, see Figure 1 , the number of hydraulic pumps 1 for delivering oil to the control valve group is three. Among them, the oil outlet of the first hydraulic pump 1 is connected to the first oil supply port P1, the oil outlet of the second hydraulic pump 1 is connected to the second oil supply port P2, and the oil outlet of the third hydraulic pump 1 is connected to the third oil supply port P3, so as to provide sufficient power oil for the hydraulic lifting system 2, thereby improving the reliability of the dump truck. In other embodiments of the present disclosure, the number of hydraulic pumps 1 for delivering oil to the control valve group is one, and the power of this hydraulic pump 1 is equivalent to the power of the above-mentioned three hydraulic pumps 1. In other words, this hydraulic pump 1 is a large-flow pump, so as to reduce the number of hydraulic pumps 1 and further improve the economy of the product.

[0050] The working principle of the control valve group disclosed in the present invention is described below:

[0051] When it is necessary to supply oil to the hydraulic lifting system 2 , at least one hydraulic pump 1 may be started, and the oil is delivered to the hydraulic lifting port JS through at least one one-way valve to supply oil to the hydraulic lifting system 2 .

[0052] When the temperature of the oil detected by the temperature sensor is greater than its own preset temperature value, the temperature sensor can send a feedback signal to the solenoid valve EV. When receiving the feedback signal, the solenoid valve EV will switch to the start state, so that the oil is transported to the hydraulic cooling port LQ through the solenoid valve EV to realize oil supply to the hydraulic cooling system 3.

[0053] When the temperature of the oil detected by the temperature sensor does not exceed its own preset temperature value, the temperature sensor can send a feedback cutoff signal to the solenoid valve EV. When the solenoid valve EV receives the feedback cutoff signal, it will switch to a closed state, thereby not supplying oil to the hydraulic cooling system 3, so as to reduce the energy consumption and workload of the hydraulic system.

[0054] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any modification, use or adaptation of the present disclosure, which follows the general principles of the present disclosure and includes common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the appended claims.

Claims

1. A control valve group, characterized in that: It includes a housing and a lifting control oil circuit and a cooling control oil circuit arranged in the housing; Wherein, the lifting control oil circuit is used to supply oil to the hydraulic lifting system; The cooling control oil circuit is used to supply oil to the hydraulic cooling system; The lifting control oil circuit is connected to the cooling control oil circuit, and the lifting control oil circuit and the cooling control oil circuit share at least one hydraulic pump.

2. The control valve assembly according to claim 1, characterized in that: The cooling control oil circuit includes a solenoid valve; the oil inlet of the solenoid valve, the first oil supply port arranged on the housing, and the first node are connected to each other, the oil outlet of the solenoid valve, the hydraulic cooling port arranged on the housing, and the second node are connected to each other, and the hydraulic cooling port and the oil inlet of the hydraulic cooling system are connected.

3. The control valve assembly according to claim 2, characterized in that: The hydraulic system other than the control valve group is provided with a temperature sensor for measuring the temperature of the hydraulic system; The control valve group is configured to control the opening and closing of the solenoid valve according to a preset temperature value of the temperature sensor.

4. The control valve assembly according to claim 3, characterized in that: The lifting control oil circuit includes a first one-way valve, an oil inlet of the first one-way valve is connected to the first node, an oil outlet of the first one-way valve, a hydraulic lifting port arranged on the housing, and a third node are connected to each other, and the hydraulic lifting port is connected to the oil inlet of the hydraulic lifting system.

5. The control valve assembly according to claim 4, characterized in that: The opening pressure of the first one-way valve is greater than the opening pressure of the solenoid valve.

6. The control valve assembly according to claim 4, characterized in that: The lifting control oil circuit also includes a second one-way valve, an oil inlet of the second one-way valve, a second oil supply port arranged on the housing, and a fourth node are connected to each other, and an oil outlet of the second one-way valve is connected to the third node.

7. The control valve assembly according to claim 4, characterized in that: The lifting control oil circuit also includes a third one-way valve, an oil inlet of the third one-way valve, a third oil supply port arranged on the shell, and a fifth node are connected to each other, and an oil outlet of the third one-way valve is connected to the third node.

8. The control valve assembly according to any one of claims 1 to 7, characterized in that: The housing is provided with a first pressure measuring port, a second pressure measuring port, a third pressure measuring port, and a fourth pressure measuring port for connecting a pressure sensor; Among them, the first pressure measuring port is connected to the first node; the second pressure measuring port is connected to the fourth node; the third pressure measuring port is connected to the fifth node; and the fourth pressure measuring port is connected to the third node.

9. The control valve assembly according to any one of claims 1 to 7, characterized in that: The housing is provided with a first measuring port, a second measuring port, a third measuring port, and a fourth measuring port for a pressure measuring device; Among them, the first measurement port is connected to the first node; the second measurement port is connected to the fourth node; the third measurement port is connected to the second node; and the fourth measurement port is connected to the third node.

10. A dump truck, comprising the control valve assembly according to any one of claims 1 to 9.

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