Hydraulic valve group and system of miniature mining hydraulic mining drill carriage

Abstract

The utility model discloses a hydraulic valve group and system of a miniature mining hydraulic mining drill carriage, and relates to the technical field of hydraulic systems, the hydraulic valve group comprises a plurality of proportional reversing valve plates and a control part, the proportional reversing valve plates comprise proportional valves and reversing valves; the proportional valve is used for controlling the flow of hydraulic oil passing through the proportional valve; the reversing valve is connected with an outlet of the proportional valve through a middle pipe group, the reversing valve is provided with a plurality of output ports, and the output ports are respectively communicated with the corresponding execution elements; and the control part is connected with each reversing valve and is used for controlling the reversing valves to reverse, so that the middle pipe group is communicated with different output ports. The miniature mining trolley has the advantage of being small in size, and the utilization efficiency of the internal space of the miniature mining trolley for mining is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic systems, and particularly relates to a hydraulic valve group and a system for a micro-mining hydraulic mining jumbo. Background Art

[0002] The internal space of a micro-mining jumbo is compact, the structure is complex and there are many actuators. Designed according to the control of one multi-way valve for one set of action mechanisms, the number of multi-way valve plates required is often very large. Generally, the maximum number of multi-way valves is set at 8-9 pieces. When the number exceeds this amount, multiple groups of multi-way valves need to be used for control. However, the internal space of a micro-mining jumbo is limited. The design of multiple groups or multiple multi-way valves is a great problem for the cost control of the jumbo and the layout of multi-way valves and pipelines. Content of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides a hydraulic valve group for a micro-mining hydraulic mining jumbo, which has the advantage of small volume and effectively improves the utilization efficiency of the internal space of the micro-mining jumbo.

[0004] A hydraulic valve group for a micro-mining hydraulic mining jumbo according to an embodiment of the first aspect of the utility model includes: a plurality of proportional directional valve plates and a control part. The proportional directional valve plates include proportional valves and directional valves. The proportional valves are used to control the flow rate of hydraulic oil passing through the proportional valves. The directional valves are connected to the outlets of the proportional valves through an intermediate pipe group. The directional valves have a plurality of outlets, and the outlets are respectively communicated with corresponding actuators. The control part is connected to each of the directional valves, and the control part is used to control the directional valves to change directions so that the intermediate pipe group is communicated with different outlets.

[0005] A hydraulic valve group for a micro-mining hydraulic mining jumbo according to an embodiment of the utility model has at least the following beneficial effects: By using the combination of proportional valves and directional valves, one proportional valve and one directional valve can control multiple actuators. Compared with the scheme of only using proportional valves, the space occupied by the hydraulic valve group is effectively reduced, and the utilization efficiency of the internal space of the micro-mining jumbo is effectively improved.

[0006] According to some embodiments of the utility model, the intermediate pipe group includes an intermediate oil supply pipe and an intermediate oil return pipe. Every two of the outlets form a set of output units. Each actuator is communicated with two of the outlets in the corresponding output unit through an actuator oil supply pipe and an actuator oil return pipe. The directional valve is used to switch the output unit communicated with the intermediate oil supply pipe and the intermediate oil return pipe.

[0007] According to some embodiments of the present utility model, the reversing valve is a three-position six-way valve, and the reversing valve has six output ports to form a first output unit, a second output unit, and a third output unit in combination. The actuators respectively connected to the first output unit, the second output unit, and the third output unit do not work simultaneously.

[0008] According to some embodiments of the present utility model, the control part includes a first pilot valve and a second pilot valve. The reversing valve is a hydraulically controlled valve. The outlets of the first pilot valve and the second pilot valve are both connected to the control port of each reversing valve. The reversing valve has a first position for connecting the first output unit to the intermediate pipe group, a second position for connecting the second output unit to the intermediate pipe group, and a third position for connecting the third output unit to the intermediate pipe group. The first pilot valve and the second pilot valve cooperate to control all the reversing valves to simultaneously switch to the first position, the second position, or the third position.

[0009] According to some embodiments of the present utility model, the first pilot valve and the second pilot valve are electrically controlled valves.

[0010] According to some embodiments of the present utility model, the reversing valve is an electrically controlled valve. The control part is electrically connected to each reversing valve. The reversing valve has a first position for connecting the first output unit to the intermediate pipe group, a second position for connecting the second output unit to the intermediate pipe group, and a third position for connecting the third output unit to the intermediate pipe group.

[0011] According to some embodiments of the present utility model, the control part is used to separately control each reversing valve to switch to the first position, the second position, or the third position.

[0012] According to some embodiments of the present utility model, the proportional valve is an electrically controlled valve.

[0013] The present utility model also provides a hydraulic system for a micro-mining hydraulic mining drill rig, including a hydraulic valve group of the micro-mining hydraulic mining drill rig, a hydraulic oil tank, a main oil pump, a main oil supply pipe, a main oil return pipe, and a plurality of actuators. The hydraulic oil tank is used to store hydraulic oil. The main oil pump is connected to the hydraulic oil tank to transport the hydraulic oil in the hydraulic oil tank into the main oil supply pipe. The main oil supply pipe is used to supply hydraulic oil to the proportional valve. The main oil return pipe is used to receive the hydraulic oil returned by the proportional valve and transport it to the hydraulic oil tank. The actuators are respectively connected and communicated with the corresponding output ports.

[0014] In the hydraulic system of a micro-mining hydraulic mining drill rig of the present utility model, the hydraulic system of the micro-mining hydraulic mining drill rig further includes a safety valve, which is connected to the outlet of the main oil pump. The safety valve opens when the outlet pressure of the main oil pump reaches a preset value, and guides the hydraulic oil in the main return oil pipe into the hydraulic oil tank.

[0015] In the hydraulic system of a micro-mining hydraulic mining drill rig of the present utility model, a filter is further provided at the outlet of the main oil pump.

[0016] The hydraulic valve group of a micro-mining hydraulic mining drill rig according to an embodiment of the present utility model has at least the following beneficial effects:

[0017] (1) By using the combination of a proportional valve and a directional valve, a proportional valve and a directional valve can control multiple actuators, effectively reducing the occupied space;

[0018] (2) When multiple actuators that cannot work simultaneously are connected to the same directional valve, it can play an interlocking role;

[0019] (3) By separately providing an execution return oil pipe and an intermediate return oil pipe for each actuator, the returned hydraulic oil can directly and smoothly return, without being affected by the hydraulic oil returned by other actuators, ensuring that multiple actuators can work simultaneously.

[0020] The additional aspects and advantages of the present utility model will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present utility model. Description of the Drawings

[0021] The following further describes the present utility model in conjunction with the drawings and embodiments, where:

[0022] Figure 1 is a schematic diagram of the overall structure of the hydraulic system of a micro-mining hydraulic mining drill rig according to an embodiment of the present utility model;

[0023] Figure 2 is a schematic diagram of the hydraulic valve group of a micro-mining hydraulic mining drill rig according to an embodiment of the present utility model;

[0024] Figure 3 is Figure 2 an enlarged view of part A in

[0025] Figure 4 is a schematic diagram of a proportional directional valve plate according to an embodiment of the present utility model.

[0026] Reference Numerals in the Drawings:

[0027] Proportional directional valve plate 100, proportional valve 110, directional valve 120;

[0028] Intermediate tube group 200, intermediate oil supply pipe 210, intermediate oil return pipe 220;

[0029] Actuator 300, actuator oil supply pipe 310, actuator oil return pipe 320;

[0030] Control unit 400, first pilot valve 410, second pilot valve 420;

[0031] Hydraulic oil tank 500;

[0032] Main oil pump 600;

[0033] Main oil supply pipe 700;

[0034] Main oil return pipe 800. Detailed implementation mode

[0035] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0036] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as up and down, etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0037] In the description of the present invention, "a plurality of" means more than two. If the first and the second are described only for the purpose of distinguishing technical features, they should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0038] In the description of the present invention, unless otherwise clearly defined, terms such as "set", "installed", "connected", etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0039] Refer to Figures 1 to 4As shown in the figure, a hydraulic valve group of a micro-mining hydraulic mining drill rig according to an embodiment of the present utility model includes: a plurality of proportional reversing valve plates 100 and a control unit 400. The proportional reversing valve plate 100 includes a proportional valve 110 and a reversing valve 120. The specific structure of the proportional valve 110 is prior art and will not be described in detail. The proportional valve 110 controls the flow rate of hydraulic oil passing through the proportional valve 110 through throttling. The reversing valve 120 is connected to the outlet of the proportional valve 110 through an intermediate pipe group 200. The reversing valve 120 has two input ports and a plurality of output ports, and each output port is respectively connected to a corresponding actuator 300. The number of proportional reversing valve plates 100 is proportional to the number of actuators 300. The control unit 400 is connected to each reversing valve 120, and the control unit 400 is used to control the reversing of the reversing valve 120 so that the intermediate pipe group 200 communicates with different output ports. In the prior art, the control of the actuator 300 is only achieved through the proportional valve 110. For each actuator 300, a corresponding proportional valve 110 needs to be provided for control, resulting in a relatively large volume of the hydraulic valve group. For a micro-mining hydraulic mining drill rig, there is limited space on the vehicle and it is impossible to accommodate a large number of proportional valves 110. By using the combination of the proportional valve 110 and the reversing valve 120, one proportional valve 110 and one reversing valve 120 can control a plurality of actuators 300. Compared with the scheme of only using the proportional valve 110, the space occupied by the hydraulic valve group is effectively reduced, and it can be applied to a micro-mining hydraulic mining drill rig with limited installation space. And at any moment, only one actuator 300 can be connected to the proportional valve 110 through a reversing valve 120 for operation, and other actuators 300 connected to the reversing valve 120 cannot operate. In a micro-mining hydraulic mining drill rig, the traveling motor, the oil cylinder, and the swing cylinder cannot work simultaneously. Therefore, when a plurality of actuators 300 that cannot work simultaneously are connected to the same reversing valve 120, an interlocking effect can be achieved, so that when one actuator 300 works, the actuators 300 connected to the same reversing valve 120 as this actuator 300 cannot work.

[0040] Referring to Figures 1 to 4 As shown in the figure, it can be understood that the intermediate pipe group 200 includes an intermediate oil supply pipe 210 and an intermediate oil return pipe 220. Every two output ports form a set of output units. Each actuator 300 is connected to two output ports in the corresponding output unit through an actuator oil supply pipe 310 and an actuator oil return pipe 320. The reversing valve 120 is used to switch the output units communicated with the intermediate oil supply pipe 210 and the intermediate oil return pipe 220. By separately providing an actuator oil return pipe 320 and an intermediate oil return pipe 220 for each actuator 300, the returned hydraulic oil can flow back smoothly directly and will not be affected by the returned hydraulic oil of other actuators, ensuring that a plurality of actuators 300 can work simultaneously.

[0041] Referring toFigures 1 to 4 As shown, it can be understood that the reversing valve 120 is a three-position six-way valve. The reversing valve 120 has six outlet ports to form a first output unit, a second output unit, and a third output unit in combination. The actuators 300 connected to the first output unit, the second output unit, and the third output unit do not work simultaneously. It can be foreseen that the more positions the reversing valve 120 has, the more actuators 300 it can control, and the smaller the overall space occupied by the control valve group of the micro-mining hydraulic mining drill rig will be. However, the more actuators 300 that cannot work simultaneously, the more it will affect the normal operation of the micro-mining hydraulic mining drill rig. Therefore, the reversing valve 120 is preferably a three-position six-way valve to achieve the purpose of reducing the volume without affecting the normal operation of the micro-mining hydraulic mining drill rig.

[0042] Refer to Figures 1 to 4 As shown, it can be understood that the control unit 400 includes a first pilot valve 410 and a second pilot valve 420. The reversing valve 120 is a hydraulically controlled valve. The outlet of the first pilot valve 410 and the outlet of the second pilot valve 420 are both connected to the control port of each reversing valve 120. By controlling the opening and closing of the first pilot valve 410 and the second pilot valve 420, the pressure at the control port of the reversing valve 120 is controlled, thereby achieving the effect of controlling the switching position of the reversing valve 120. The reversing valve 120 has a first position where the first output unit is connected to the intermediate pipe group 200, a second position where the second output unit is connected to the intermediate pipe group 200, and a third position where the third output unit is connected to the intermediate pipe group 200. The first pilot valve 410 and the second pilot valve 420 cooperate to control all the reversing valves 120 to switch to the first position, the second position, or the third position simultaneously. Since the volume of a hydraulically controlled valve is usually smaller than that of an electrically controlled valve of the corresponding specification, the advantage of using a hydraulically controlled valve is that it can further reduce the overall space occupied by the control valve group of the micro-mining hydraulic mining drill rig. However, controlling all the reversing valves 120 only through the first pilot valve 410 and the second pilot valve 420 will cause all the reversing valves 120 to only be able to switch to the first position, the second position, or the third position simultaneously, and it is impossible to operate a single reversing valve 120 alone. However, such a control scheme not only greatly improves the space utilization efficiency but also significantly reduces the system cost.

[0043] Refer to Figures 1 to 4 As shown, it can be understood that the first pilot valve 410 and the second pilot valve 420 are electrically controlled valves. Since the overall operating system of the control valve group of the micro-mining hydraulic mining drill rig is electrically controlled, the first pilot valve 410 and the second pilot valve 420 cannot be controlled by a hydraulically controlled valve, so only electrically controlled valves can be selected.

[0044] Refer to Figures 1 to 4As shown, it can be understood that the reversing valve 120 is an electrically controlled valve, and the control unit 400 is the electric control system of the micro-mining hydraulic mining drill jumbo. The specific structure of the control unit 400 is not shown in the figure and is the prior art, so it will not be described in detail. The control unit 400 is electrically connected to each reversing valve 120. The reversing valve 120 has a first position for connecting the first output unit to the intermediate pipe group 200, a second position for connecting the second output unit to the intermediate pipe group 200, and a third position for connecting the third output unit to the intermediate pipe group 200. The control unit 400 is used to control each reversing valve 120 to switch to the first position, the second position or the third position respectively. Since the volume of the electrically controlled valve is usually larger than that of the corresponding hydraulic control valve of the same specification and the cost is also higher, the advantage of using the electrically controlled valve is that it can operate a single reversing valve 120 alone, so that any two actuators 300 connected to different control valves can work simultaneously. When operating the actuator 300, it can be more flexible.

[0045] Referring to Figures 1 to 4 As shown, it can be understood that the proportional valve 110 is an electrically controlled valve. The proportional valve 110 is selected as an electrically controlled valve to have a faster response speed and adjustment accuracy, which is convenient for accessing the intelligent operating system. Although the electrically controlled valve has the disadvantage of a larger volume, the proportional valve 110 can only be selected as an electrically controlled valve to meet the design requirements.

[0046] In some other embodiments of the present invention, a hydraulic system of a micro-mining hydraulic mining drill jumbo is further provided, including: the above-mentioned hydraulic valve group of the micro-mining hydraulic mining drill jumbo, a hydraulic oil tank 500, a main oil pump 600, a main oil supply pipe 700, a main oil return pipe 800, and a plurality of actuators 300. The hydraulic oil tank 500 is used to store hydraulic oil. The main oil pump 600 is a piston pump. The main oil pump 600 is connected to the hydraulic oil tank 500 to transport the hydraulic oil in the hydraulic oil tank 500 into the main oil supply pipe 700. The main oil supply pipe 700 is connected to each proportional valve 110 through an oil supply branch pipe. The main oil supply pipe 700 is used to supply hydraulic oil to the proportional valve 110. The main oil return pipe 800 is connected to each proportional valve 110 through an oil return branch pipe. The main oil return pipe 800 is used to receive the hydraulic oil returned by the proportional valve 110 and transport it to the hydraulic oil tank 500. The actuator 300 is respectively connected to the corresponding output port. The actuator 300 includes but is not limited to: a swing cylinder, a travel motor, and an oil cylinder.

[0047] Referring to Figures 1 to 4 As shown, it can be understood that the hydraulic system of the micro-mining hydraulic mining drill jumbo further includes a safety valve. The safety valve is connected to the outlet of the main oil pump 600. The safety valve opens when the outlet pressure of the main oil pump 600 reaches a preset value, and introduces the hydraulic oil in the main oil return pipe 800 into the hydraulic oil tank 500. The safety valve plays a role in preventing the pressure in the main oil supply pipe 700 from being too high.

[0048] Referring toFigures 1 to 4 As shown, it can be understood that a filter is also provided at the outlet of the main oil pump 600. The filter is used to filter impurities in the hydraulic oil to prevent the proportional valve 110 and the reversing valve 120 from being stuck by impurities and unable to work properly.

[0049] Working principle: The main oil pump 600 sucks hydraulic oil from the hydraulic oil tank 500, then increases the pressure of the hydraulic oil and sends the hydraulic oil into the main oil supply pipe 700. The main oil supply pipe 700 transports the hydraulic oil to each proportional valve 110. The flow rate of the hydraulic oil is controlled by throttling through the proportional valve 110, and then flows to the reversing valve 120 and is transported to the corresponding actuator 300 according to the state of the reversing valve 120.

[0050] The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes can be made without departing from the gist of the present invention.

Claims

1. A hydraulic valve group for a miniature hydraulic mining drill, characterized in that: include: A plurality of proportional reversing valve plates (100), the proportional reversing valve plates (100) comprising a proportional valve (110) and a reversing valve (120); the proportional valve (110) is used to control the flow of hydraulic oil passing through the proportional valve (110); the reversing valve (120) is connected to an outlet of the proportional valve (110) via an intermediate pipe group (200); the reversing valve (120) has a plurality of output ports, the output ports being respectively connected to corresponding actuators (300); A control unit (400), the control unit (400) being connected to each of the reversing valves (120), the control unit (400) being used to control the reversing of the reversing valves (120) so that the intermediate pipe group (200) is connected to different output ports.

2. The hydraulic valve group of the miniature hydraulic mining drill according to claim 1 is characterized in that: The intermediate pipe group (200) comprises an intermediate oil supply pipe (210) and an intermediate oil return pipe (220); each two output ports form a group of output units; each actuator (300) is connected to two output ports in the corresponding output unit via the actuator oil supply pipe (310) and the actuator oil return pipe (320); and the reversing valve (120) is used to switch the output unit connected to the intermediate oil supply pipe (210) and the intermediate oil return pipe (220).

3. The hydraulic valve group of the miniature hydraulic mining drill according to claim 2 is characterized in that: The reversing valve (120) is a three-position six-way valve, the reversing valve (120) having six output ports to form a first output unit, a second output unit and a third output unit in combination, the actuators (300) to which the first output unit, the second output unit and the third output unit are respectively connected do not operate at the same time.

4. The hydraulic valve group of the miniature hydraulic mining drill according to claim 3 is characterized in that: The control unit (400) comprises a first pilot valve (410) and a second pilot valve (420); the reversing valve (120) is a hydraulically controlled valve; an outlet of the first pilot valve (410) and an outlet of the second pilot valve (420) are both connected to a control port of each reversing valve (120); the reversing valve (120) has a first position for connecting the first output unit to the intermediate pipe group (200), a second position for connecting the second output unit to the intermediate pipe group (200), and a third position for connecting the third output unit to the intermediate pipe group (200); the first pilot valve (410) and the second pilot valve (420) cooperate to control all the reversing valves (120) to switch to the first position, the second position or the third position simultaneously.

5. The hydraulic valve group of the miniature hydraulic mining drill according to claim 4 is characterized in that: The first pilot valve (410) and the second pilot valve (420) are electrically controlled valves.

6. The hydraulic valve group of the miniature hydraulic mining drill according to claim 3 is characterized by: The reversing valve (120) is an electrically controlled valve. The control unit (400) is electrically connected to each of the reversing valves (120). The reversing valve (120) has a first position for connecting the first output unit to the intermediate pipe group (200), a second position for connecting the second output unit to the intermediate pipe group (200), and a third position for connecting the third output unit to the intermediate pipe group (200). The control unit (400) is used to control each of the reversing valves (120) to switch to the first position, the second position, or the third position.

7. The hydraulic valve group of the miniature hydraulic mining drill according to claim 1 is characterized in that: The proportional valve (110) is an electrically controlled valve.

8. A hydraulic system for a miniature hydraulic mining drill, characterized in that: include: A hydraulic valve group, a hydraulic oil tank (500), a main oil pump (600), a main oil supply pipe (700), a main oil return pipe (800), and a plurality of actuators (300) of a miniature hydraulic mining drill vehicle as described in any one of claims 1 to 7, wherein the hydraulic oil tank (500) is used to store hydraulic oil, the main oil pump (600) is connected to the hydraulic oil tank (500) to transport the hydraulic oil in the hydraulic oil tank (500) to the main oil supply pipe (700), the main oil supply pipe (700) is used to provide hydraulic oil to the proportional valve (110), the main oil return pipe (800) is used to receive the hydraulic oil returned by the proportional valve (110) and transport it to the hydraulic oil tank (500), and the actuators (300) are respectively connected to the corresponding output ports.

9. The hydraulic system of the miniature hydraulic mining drill vehicle according to claim 8, characterized in that: The hydraulic system of the micro-mining hydraulic mining drill also includes a safety valve, which is connected to the outlet of the main oil pump (600). When the outlet pressure of the main oil pump (600) reaches a preset value, the safety valve opens to guide the hydraulic oil in the main return oil pipe (800) into the hydraulic oil tank (500).

10. The hydraulic system of the miniature hydraulic mining drill vehicle according to claim 9, characterized in that: The outlet of the main oil pump (600) is also provided with a filter.

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