CN116336025B - Mining shuttle car cable reeling electrohydraulic control valve group and cable reeling control method thereof - Google Patents
Mining shuttle car cable reeling electrohydraulic control valve group and cable reeling control method thereof Download PDFInfo
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- CN116336025B CN116336025B CN202310395547.5A CN202310395547A CN116336025B CN 116336025 B CN116336025 B CN 116336025B CN 202310395547 A CN202310395547 A CN 202310395547A CN 116336025 B CN116336025 B CN 116336025B
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000005065 mining Methods 0.000 title claims abstract description 21
- 238000004804 winding Methods 0.000 claims abstract description 56
- 230000008569 process Effects 0.000 claims abstract description 14
- 239000003245 coal Substances 0.000 claims description 15
- 230000005611 electricity Effects 0.000 claims description 3
- 230000008676 import Effects 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 abstract description 10
- 239000002699 waste material Substances 0.000 abstract description 3
- 238000005096 rolling process Methods 0.000 description 8
- 230000001276 controlling effect Effects 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 3
- 230000020169 heat generation Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/021—Valves for interconnecting the fluid chambers of an actuator
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/02—Driving gear
- B66D1/08—Driving gear incorporating fluid motors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/28—Other constructional details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/28—Other constructional details
- B66D1/40—Control devices
- B66D1/48—Control devices automatic
- B66D1/50—Control devices automatic for maintaining predetermined rope, cable, or chain tension, e.g. in ropes or cables for towing craft, in chains for anchors; Warping or mooring winch-cable tension control
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention relates to a mining shuttle car cable reeling electrohydraulic control valve group and a cable reeling control method thereof, and belongs to the technical field of shuttle car control. The hydraulic shuttle car comprises a valve block, a two-position three-way electromagnetic directional valve, a proportional overflow valve and a controller, wherein the two-position three-way electromagnetic directional valve and the proportional overflow valve are arranged in an inner cavity of the valve block, a T port of the two-position three-way electromagnetic directional valve is communicated into an oil tank of a hydraulic system of the shuttle car, an A port of the two-position three-way electromagnetic directional valve is connected with an oil inlet of a cable winding motor, an inlet and an outlet of the proportional overflow valve are respectively connected with an oil inlet and an oil outlet of the cable winding motor, and the two-position three-way electromagnetic directional valve and the proportional overflow valve are both connected with the controller. The invention not only greatly simplifies the structure, but also can realize real-time linkage with the state of the shuttle car through the proportional overflow valve, realize control of switching of the cable winding oil way and adjustment of overflow pressure according to the need, avoid heating and energy waste caused by the shuttle car in the idle state, and reduce constant high-pressure overflow and energy loss in the travelling process of the shuttle car.
Description
Technical Field
The invention relates to the technical field of shuttle car control, in particular to a mining shuttle car cable reeling electrohydraulic control valve group and a cable reeling control method thereof.
Background
The shuttle car is a key matched device of a mechanized mining technology and is used for short-distance transportation of short-wall working face coal. The concrete working flow of the shuttle car is that coal is loaded from a continuous miner or an anchor digger, transported to a feeding crusher for unloading coal, and frequently reciprocated between loading and unloading points, so that the transportation of working face coal is realized. The shuttle car is provided with a power supply by a towing cable and is provided with an onboard automatic cable winding system, and the device can accommodate a certain length of cable and has the function of automatically winding and unwinding the cable when the device retreats and advances. The heat dissipation of the hydraulic system of the shuttle car is not only required to consider the self heat generation amount, but also required to consider the heat generation amount of the brake. The hydraulic system heat dissipation problem becomes particularly pronounced when the shuttle car is used in underground mining conditions where ambient temperatures are high. However, the shuttle car has limited space, and accessories such as a radiator and the like are difficult to install, so how to reduce the heating value of the hydraulic system and improve the efficiency is important to the stable and efficient operation of the shuttle car. The cable winding control valve group of the shuttle car is a valve group for controlling the cable winding and unwinding of the shuttle car.
The cable winding control valve group of the existing shuttle car mainly comprises a hydraulic control reversing valve, a one-way valve, a high-torque (high-pressure) overflow valve, a low-torque (low-pressure) overflow valve and a valve body, and the switching of the reversing valve is finished by means of hydraulic control. Under the state that the shuttle car loads coal, unloads coal or other non-walking idle machines, the full flow of the cable winding loop overflows at high pressure (the set value of the high-torque overflow valve), so that energy waste is caused, and the heating value of a hydraulic system is increased. In the coal transporting process, the redundant flow of the cable winding loop always overflows at a constant value and high pressure, so that the problems of energy loss, large cable tension change range and the like are caused. In the process of returning to the coal loading point, the cable winding motor is in a pump working condition, in order to prevent stopping, the cable winding roller continues to unwind due to inertia, and the low-torque (low-pressure) overflow valve provides certain back pressure, but in the process of returning to the coal loading point, the overflow is useless, and heating and energy loss are caused.
In summary, the existing shuttle car cable winding control valve group is complex in structure, and poor in matching between oil circuit and pressure switching and the running state of the shuttle car, so that the cable winding loop of the shuttle car is in a full-flow and high-pressure overflow heating state in an idle state, and the heating value of a hydraulic system is increased, heat dissipation is difficult, and unnecessary energy loss is caused.
Disclosure of Invention
In order to solve the technical problems, the invention provides a mining shuttle car cable reeling electrohydraulic control valve group and a cable reeling control method thereof. The technical scheme of the invention is as follows:
in a first aspect, a mining shuttle car cable reeling electrohydraulic control valve bank is provided, which comprises a valve block, a two-position three-way electromagnetic directional valve, a proportional overflow valve and a controller, wherein the two-position three-way electromagnetic directional valve and the proportional overflow valve are arranged in an inner cavity of the valve block, a T port of the two-position three-way electromagnetic directional valve is communicated into an oil tank of a shuttle car hydraulic system, an A port of the two-position three-way electromagnetic directional valve is connected with an oil inlet of a cable reeling motor, an inlet and an outlet of the proportional overflow valve are respectively connected with an oil inlet and an oil outlet of the cable reeling motor, and the two-position three-way electromagnetic directional valve and the proportional overflow valve are both connected with the controller.
Optionally, the mining shuttle car cable reeling electrohydraulic control valve group further comprises an infrared ranging sensor, and the infrared ranging sensor is installed on the cable reeling drum and connected with the controller.
Optionally, the two-position three-way electromagnetic reversing valve adopts a two-position three-way explosion-proof electromagnetic reversing valve, and the proportional overflow valve adopts an explosion-proof proportional overflow valve.
Optionally, the two-position three-way electromagnetic reversing valve and the proportional overflow valve are both in threaded plug-in type.
In a second aspect, a cable rolling control method for the cable rolling electro-hydraulic control valve group of a mining shuttle car is provided, and the cable rolling control method adopts the cable rolling electro-hydraulic control valve group of the mining shuttle car in the first aspect, and includes the following steps:
s1, when a shuttle car is in a state of idle, a controller controls a two-position three-way electromagnetic reversing valve to lose electricity, and pressure oil of a cable winding loop directly flows back into an oil tank;
s2, when the shuttle car is in the coal conveying process, the controller controls the two-position three-way electromagnetic reversing valve to be electrified and to reverse, the pressure oil of the cable winding loop drives the cable winding motor to wind the cable, and in the process, the controller controls the proportional overflow valve to be electrified and continuously adjusts overflow pressure.
Optionally, when the controller controls the proportional overflow valve to be electrified and continuously adjusts the overflow pressure, the overflow pressure is determined according to the effective cable winding radius of the cable winding drum measured by the infrared ranging sensor, and the cable winding motor is controlled to conduct constant tension cable winding according to the overflow pressure.
Optionally, when the controller detects a braking signal to the shuttle car, the controller controls the proportional relief valve to reduce the relief pressure to provide back pressure for the cable winding motor to prevent the cable winding drum from continuing to unwind due to inertia.
All the above optional technical solutions can be arbitrarily combined, and the detailed description of the structures after one-to-one combination is omitted.
By means of the scheme, the beneficial effects of the invention are as follows:
the cable coiling electrohydraulic control valve group of the shuttle car for mine is formed by the two-position three-way electromagnetic reversing valve and the proportional overflow valve, compared with the cable coiling control valve group in the prior art, the structure is greatly simplified, real-time linkage with the state of the shuttle car can be realized by the proportional overflow valve, the switching of a cable coiling oil way and the adjustment of overflow pressure according to the requirement are realized, the heating problem and the energy waste caused by full flow and high pressure overflow of the shuttle car in an idle state are avoided, constant high pressure overflow and energy loss in the travelling process of the shuttle car are reduced, the stress condition of the cable is improved, and the service life of the cable is prolonged.
The foregoing description is only an overview of the present invention, and is intended to provide a better understanding of the present invention, as it is embodied in the following description, with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
Fig. 1 is a schematic view of the constitution of the present invention.
FIG. 2 is a schematic diagram of the connection relationship of the controllers according to the present invention.
Detailed Description
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
As shown in fig. 1 and 2, the embodiment of the invention provides a mining shuttle car cable reeling electrohydraulic control valve group, which comprises a valve block 1, a two-position three-way electromagnetic directional valve 2, a proportional overflow valve 3 and a controller 4, wherein the two-position three-way electromagnetic directional valve 2 and the proportional overflow valve 3 are arranged in an inner cavity of the valve block 1, a T port of the two-position three-way electromagnetic directional valve 2 is communicated into an oil tank 6 of a shuttle car hydraulic system, an A port of the two-position three-way electromagnetic directional valve 2 is connected with an oil inlet of a cable reeling motor 7, an inlet and an outlet of the proportional overflow valve 3 are respectively connected with an oil inlet and an oil outlet of the cable reeling motor 7, and the two-position three-way electromagnetic directional valve 2 and the proportional overflow valve 3 are both connected with the controller 4.
Wherein, two tee bend electromagnetic reversing valve 2 is normally open two tee bend electromagnetic reversing valve. The controller 4 may be a PLC or a single chip microcomputer.
Based on the structure, in the power-off state of the two-position three-way electromagnetic directional valve 2 (namely, the P port of the two-position three-way electromagnetic directional valve 2 is communicated with the T port), the pressure oil of the cable winding loop directly flows back to the oil tank 6; when the two-position three-way electromagnetic directional valve 2 is powered on (namely, the P port of the two-position three-way electromagnetic directional valve 2 is communicated with the A port), the pressure oil drives the cable winding motor 7 to wind cables. The cable reeling pressure and the cable unreeling pressure can be regulated by the proportional overflow valve 3, and the two-position three-way electromagnetic directional valve 2 and the proportional overflow valve 3 are controlled by the controller 4 according to sensor information or driver instruction information.
Optionally, the mining shuttle car cable reeling electrohydraulic control valve group further comprises an infrared ranging sensor 5, and the infrared ranging sensor 5 is installed on the cable reeling drum 8 and connected with the controller 4. Through setting up infrared range sensor 5, can real-time detection cable drum 8 effective cable rolling radius, and then make controller 4 can be according to cable drum 8 effective cable rolling radius control proportion overflow valve 3's aperture, and then control cable rolling pressure and cable laying pressure.
The two-position three-way electromagnetic directional valve 2 is a two-position three-way explosion-proof electromagnetic directional valve, and the proportional overflow valve 3 is an explosion-proof proportional overflow valve so as to meet the underground use requirements of the coal mine.
In addition, the two-position three-way electromagnetic directional valve 2 and the proportional overflow valve 3 are in threaded insertion type, namely the two-position three-way electromagnetic directional valve 2 and the proportional overflow valve 3 are in threaded connection with the inner cavity of the valve block 1. Of course, the two-position three-way electromagnetic directional valve 2 and the proportional overflow valve 3 can also be plate valves or tubular valves.
The embodiment of the invention also provides a cable reeling control method of the mining shuttle car cable reeling electrohydraulic control valve bank, which adopts the mining shuttle car cable reeling electrohydraulic control valve bank described in the embodiment, and comprises the following steps:
s1, when the shuttle car is in a state of being out of order, the controller 4 controls the two-position three-way electromagnetic directional valve 2 to lose electricity, and pressure oil of the cable winding loop directly flows back into the oil tank 6.
Specifically, when the shuttle car is in a coal loading, coal unloading or other non-walking state, the shuttle car is in a machine-idle state. By setting the shuttle car in the idle state, the pressure oil of the cable winding loop directly flows back into the oil tank 6, so that no overflow energy loss is ensured in the shuttle car idle state, namely the cable winding loop generates heat without overflow.
S2, when the shuttle car is in the coal conveying process, the controller 4 controls the two-position three-way electromagnetic directional valve 2 to be powered on and to perform directional control, pressure oil of the cable winding loop drives the cable winding motor 7 to wind the cable, and in the process, the controller 4 controls the proportional overflow valve 3 to be powered on and continuously adjusts overflow pressure.
Specifically, the controller 4 controls the pressure range for adjusting the overflow pressure to be between P1 (2.5 MPa) and P2 (6 MPa), and the specific pressure value is determined according to the effective cable winding radius of the cable winding drum measured by the infrared ranging sensor 5. The controller 4 controls the proportional overflow valve 3 to be electrified and continuously adjusts the overflow pressure, so that the redundant flow overflows with variable pressure in the cable winding process, fixed-value high-pressure overflow is avoided, and the overflow heating value is reduced.
Preferably, the controller 4 determines the overflow pressure according to the effective cable winding radius of the cable winding drum 8 measured by the infrared ranging sensor 5 when the proportional overflow valve 3 is controlled to be powered and continuously adjusts the overflow pressure, and controls the cable winding motor 7 to perform constant tension cable winding according to the overflow pressure.
Specifically, the principle of the controller 4 controlling the proportional overflow valve 3 to be powered on and controlling the cable winding motor 7 to perform constant tension cable winding is as follows:（1）
in the formula (1), N represents the driving torque of the cable drum 8; t represents the tensile force exerted on the cable; r' represents the actual cable radius.（2）
In the formula (2)PIndicating the pressure difference between an inlet and an outlet of a hydraulic motor;representing chain drive efficiency; />Representing the mechanical efficiency of the cable winding motor;irepresenting the transmission ratio of the roller chain wheel to the motor chain wheel; />Representing cable motor displacement.
The formula (1) and the formula (2) are combined, and the constant coefficient are K（3）
In the formula (3), R 'can be obtained through indirect measurement of an infrared ranging sensor 5, and according to the value of the actual rolling cable radius R', the controller 4 adjusts the delta by adjusting the pressure set value of the proportional relief valve 3PValues. Specifically, when R' becomes larger, delta is increasedPBecome larger and vice versa, and thus can be realizedTThe value is constant, and the purpose of constant-tension cable winding is achieved.
In summary, in the embodiment of the invention, the pressure adjustment of the proportional overflow valve 3 in the cable winding process can be performed according to the real-time effective cable winding radius value measured by the infrared ranging sensor 5, thereby avoiding fixed-value high-pressure overflow in the cable winding process, reducing the overflow heating value and realizing the approximately constant-tension cable winding.
Further, when the controller 4 detects a braking signal to the shuttle car, the controller 4 controls the proportional relief valve 3 to reduce the relief pressure to provide back pressure for the cable winding motor 7, preventing the cable winding drum 8 from continuing to unwind due to inertia. The running speed of the shuttle car can be detected in real time through the speed sensor, and when the running speed is reduced sharply, the detection of the braking signal of the shuttle car is determined. Further, when the relief pressure is reduced, the relief pressure may be adjusted to 1.5MPa.
In summary, the invention not only effectively reduces the ineffective energy consumption and heating of the hydraulic system, but also realizes the approximately constant tension cable winding through the linkage of the effective cable winding radius measured by the infrared ranging sensor 5 and the proportional overflow valve 3, and improves the stress condition of the cable. Specifically, the tension force exerted on the cable is reduced under the condition that the cable stretches and hangs a certain distance. And secondly, compared with the traditional cable reeling valve group, the cable reeling electrohydraulic control valve group of the mining shuttle car has the advantages that the number of valve elements is greatly reduced, and the structure is greatly simplified.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, and it should be noted that it is possible for those skilled in the art to make several improvements and modifications without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.
Claims (5)
1. The utility model provides a mining shuttle car cable reeling electrohydraulic control valve group, its characterized in that, including valve piece (1), two tee bend electromagnetic directional valve (2), proportion overflow valve (3), controller (4) and infrared range finding sensor (5), two tee bend electromagnetic directional valve (2) and proportion overflow valve (3) are installed in the inner chamber of valve piece (1), the T mouth intercommunication of two tee bend electromagnetic directional valve (2) is in shuttle car hydraulic system's oil tank (6), the A mouth of two tee bend electromagnetic directional valve (2) is connected with the oil inlet of cable reeling motor (7), the import and the export of proportion overflow valve (3) are connected with the oil inlet and the oil-out of cable reeling motor (7) respectively, two tee bend electromagnetic directional valve (2) and proportion overflow valve (3) all are connected with controller (4), infrared range finding sensor (5) are installed on cable reeling cylinder (8) and are connected with controller (4).
2. The mining shuttle car cable reeling electrohydraulic control valve set of claim 1, wherein the two-position three-way electromagnetic directional valve (2) is a two-position three-way explosion-proof electromagnetic directional valve, and the proportional overflow valve (3) is an explosion-proof proportional overflow valve.
3. The mining shuttle car cable reeling electrohydraulic control valve set of claim 1, characterized in that the two-position three-way electromagnetic directional valve (2) and the proportional overflow valve (3) are both screw thread plug-in type.
4. A cable reeling control method of a mining shuttle car cable reeling electrohydraulic control valve set, characterized in that the cable reeling control method adopts the mining shuttle car cable reeling electrohydraulic control valve set as claimed in any one of claims 1 to 3, comprising the following steps:
s1, when the shuttle car is in a state of idle, a controller (4) controls a two-position three-way electromagnetic reversing valve (2) to lose electricity, and pressure oil of a cable winding loop directly flows back into an oil tank (6);
s2, when the shuttle car is in the coal conveying process, the controller (4) controls the two-position three-way electromagnetic reversing valve (2) to be powered on and reversing, pressure oil of the cable winding loop drives the cable winding motor (7) to wind the cable, and in the process, the controller (4) controls the proportional overflow valve (3) to be powered on and continuously adjusts overflow pressure;
when the controller (4) controls the proportional overflow valve (3) to be electrified and continuously adjusts overflow pressure, the overflow pressure is determined according to the effective cable winding radius of the cable winding roller (8) measured by the infrared ranging sensor (5), and the cable winding motor (7) is controlled to conduct constant tension cable winding according to the overflow pressure.
5. The cable reeling control method according to claim 4, wherein when the controller (4) detects a brake signal to the shuttle car, the controller (4) controls the proportional relief valve (3) to reduce the relief pressure to provide back pressure to the cable reeling motor (7) to prevent the cable reeling drum (8) from continuing unreeling due to inertia.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310395547.5A CN116336025B (en) | 2023-04-14 | 2023-04-14 | Mining shuttle car cable reeling electrohydraulic control valve group and cable reeling control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310395547.5A CN116336025B (en) | 2023-04-14 | 2023-04-14 | Mining shuttle car cable reeling electrohydraulic control valve group and cable reeling control method thereof |
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| CN116336025A CN116336025A (en) | 2023-06-27 |
| CN116336025B true CN116336025B (en) | 2024-04-09 |
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- 2023-04-14 CN CN202310395547.5A patent/CN116336025B/en active Active
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| CN116336025A (en) | 2023-06-27 |
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