CN215711374U - Mine hoist load follow-up two-stage braking stepless pressure regulating hydraulic station - Google Patents
Mine hoist load follow-up two-stage braking stepless pressure regulating hydraulic station Download PDFInfo
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- CN215711374U CN215711374U CN202122079185.8U CN202122079185U CN215711374U CN 215711374 U CN215711374 U CN 215711374U CN 202122079185 U CN202122079185 U CN 202122079185U CN 215711374 U CN215711374 U CN 215711374U
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Abstract
The utility model relates to a mine hoist load follow-up secondary braking stepless pressure regulating hydraulic station, which comprises a hydraulic station and a hydraulic station control device, wherein the hydraulic station and the hydraulic station control device are connected through an electric control signal, and the hydraulic station control device sends an oil pressure control signal to the hydraulic station according to detected state information of a hoist. The hydraulic station receives the control signal sent by the hydraulic station control device, the working brake state, the secondary brake state, the primary brake state and the mutual state conversion of the working brake state, the secondary brake state and the primary brake state are respectively realized, the oil pressure values of the working brake state, the secondary brake state and the primary brake state are simultaneously controlled, and the adjustment range of the oil pressure value of the secondary brake state is up to 0-brake pad attaching oil pressure along with the load of the elevator. The utility model can adjust the hydraulic braking oil pressure value in the safe braking process in real time along with the load of the elevator, thereby realizing the basically constant deceleration no matter what load working condition the elevator works under, ensuring the safe and reliable operation of the elevator and prolonging the service life of equipment.
Description
Technical Field
The utility model relates to the technical field of mine hoist control, in particular to a load follow-up secondary braking stepless pressure regulating hydraulic station of a mine hoist.
Background
The hydraulic station is an important component of the mine hoist and is related to the operation safety of the mine hoist. In conventional hoists, constant torque, constant deceleration, and dual torque hydraulic stations are typically employed. The braking torque of a brake is constant due to constant safety braking oil pressure of a constant-torque hydraulic station, different braking effects can be generated under the condition that the lifting load of a lifting machine is changed relative to different lifting processes, the lowering working condition relative to heavy load can cause over-rolling and top-impacting accidents due to over-small deceleration, and the lifting working condition relative to heavy load can possibly cause rope breaking accidents due to over-large braking deceleration and over-violence, so that economic loss and even serious consequences of casualties can be brought to mine production! The safety braking oil pressure of the constant deceleration hydraulic station can be changed by adapting to the working condition of the load change of the hoister, but the control mode adopts speed-oil pressure double closed-loop control, and the speed control and the oil pressure control are large time constant systems, so that the rapidity following performance of the system is poor, the ladder-type change of the safety braking speed and the deceleration is formed, and the impact can be caused to the hoisting system; the double-torque hydraulic station is characterized in that two different safety brake oil pressure values are arranged according to different lifting directions, the control mode of the oil pressure values completely ignores the basic mechanical principle that the lifting direction does not represent the direction of a load force, and the control effect of the double-torque hydraulic station sometimes has an opposite result in the sense of the fact that the control effect is contrary to the expectation, and becomes a safety hazard!
Therefore, the conventional hydraulic station of the mine hoist obviously has defects, and in order to solve the existing problems, a hydraulic station which can change the hydraulic braking oil pressure of the hydraulic station and the braking torque generated by a brake controlled by the hydraulic station along with the working state (heavy object lifting or lowering) of the hoist and the change of the load size so as to realize basically unchanged deceleration is urgently needed.
Disclosure of Invention
In order to overcome the defects in the prior art, the utility model aims to provide a mine hoist load follow-up secondary braking stepless pressure regulating hydraulic station, which can adjust the hydraulic braking oil pressure value during safety braking in real time along with the hoist load, thereby realizing the basically constant safety braking deceleration no matter what load working condition the hoist works under, ensuring the safe and reliable operation of the hoist and prolonging the service life of equipment.
The purpose of the utility model is realized by adopting the following technical scheme. The mine hoist load follow secondary brake stepless pressure regulating hydraulic station comprises a hydraulic station and a hydraulic station control device which are connected through an electric control signal, wherein the hydraulic station comprises a working brake part, a safety brake part and a working state switching part, the working state switching part comprises a B pipe safety brake electromagnetic valve G3 communicated with a B group of disc brakes through a B pipe/A B pipe primary brake electromagnetic valve G4 and an A pipe safety brake electromagnetic valve G3 communicated with the A group disc brake through an A pipe; the safety braking part comprises an energy accumulator, a secondary braking pressure regulating proportional valve for regulating the oil pressure in the energy accumulator, and a B pipe secondary braking delay electromagnetic valve G5 and a check valve which are connected with the energy accumulator, and the other ends of the B pipe secondary braking delay electromagnetic valve G5 and the check valve are respectively connected with an oil tank and an overflow valve; the working brake part comprises an overflow valve, an A-tube safety brake solenoid valve G3 and a B-tube safety brake solenoid valve G3 which are communicated with the hydraulic oil pipeline/The working brake part is also provided with a working brake pressure regulating proportional valve for controlling the oil pressure of the hydraulic oil output by the working brake part; the A pipeThe safety brake electromagnetic valve G3 can discharge the hydraulic oil in the pipe A to the oil tank when the power is off, and the safety brake electromagnetic valve G3 in the pipe B/The hydraulic oil in the tube B can be discharged to the energy accumulator when the electricity is lost, in order to keep the oil pressure, redundant hydraulic oil in the energy accumulator is discharged to the oil tank through the secondary braking pressure regulating proportional valve, the secondary braking time-delay electromagnetic valve G5 of the tube B can discharge all the hydraulic oil in the energy accumulator to the oil tank when the electricity is obtained, and the primary braking electromagnetic valve G4 of the tube B can discharge the hydraulic oil in the tube B to the oil tank when the electricity is lost; the hydraulic station control device controls the operation of the hydraulic station.
The object of the present invention and the technical problems solved thereby can be further achieved by the following technical measures.
In the load-following two-stage braking stepless pressure regulating hydraulic station for the mine hoist, the hydraulic station control device analyzes and calculates the running state, the load size and the oil pressure value of the hoist by detecting the running speed of the hoist, the position of a hoisting container and the voltage current of a main motor of the hoist, and sends an oil pump motor control signal, an electromagnetic valve control signal and an oil pressure control signal to the hydraulic station.
In the mine hoist load follow secondary braking stepless pressure regulating hydraulic station, the safety braking part is also provided with a secondary braking oil pressure gauge for displaying the oil pressure in the energy accumulator.
In the mine hoist load follow-up secondary braking stepless pressure regulating hydraulic station, the working braking part is also provided with a pressure regulating proportional valve for displaying the oil pressure of hydraulic oil output by the working braking part.
Compared with the prior art, the utility model has obvious advantages and beneficial effects. By means of the technical scheme, the utility model can achieve considerable technical progress and practicability, has wide industrial utilization value and at least has the following advantages:
1. the mine hoist load follow-up secondary braking stepless pressure regulating hydraulic station fundamentally solves the problem that the current hydraulic station can not change the value of the secondary braking oil pressure according to the load of the hoist, realizes the adjustment of the secondary braking oil pressure and the braking torque of a brake within the range of 0-brake shoe oil pressure in real time along with the load of the hoist, realizes the basic constant value of the safe braking deceleration, ensures the safe braking stability of the hoist, and prolongs the service life of a hoisting system!
2. The mine hoist load follow-up secondary braking stepless pressure regulating hydraulic station has the characteristics of real-time performance, directness, high precision and the like, avoids secondary disasters, and ensures safe and reliable operation of the hoist!
Drawings
FIG. 1 is a block diagram of a mine hoist load follow-up secondary braking stepless pressure regulating hydraulic station;
fig. 2 is a hydraulic schematic diagram of a mine hoist load follow-up secondary braking stepless pressure regulating hydraulic station.
[ description of main element symbols ]
1-Hydraulic station control device
2-Hydraulic station
20-working brake oil pressure gauge
21-oil pump motor
22-oil pump
23-oil filter
24-working brake pressure regulating proportional valve
25-overflow valve
26-two-stage brake pressure regulating proportional valve
27-energy accumulator
28-one-way valve
29-two-stage brake oil pressure gauge
G3-A pipe safety brake electromagnetic valve
G3/-B pipe safety brake solenoid valve
G4-B pipe primary brake electromagnetic valve
G5-B pipe two-stage brake time-delay electromagnetic valve
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description will be given to the embodiments, structures, features and effects of the load follow-up secondary braking stepless pressure regulating hydraulic station for a mine hoist according to the present invention with reference to the accompanying drawings and preferred embodiments.
Please refer to fig. 1 and 2, which are schematic structural diagrams of parts of a load follow-up secondary braking stepless pressure regulating hydraulic station of a mine hoist according to the present invention, the stepless pressure regulating hydraulic station comprises a hydraulic station 2 and a hydraulic station control device 1 connected by an electrical control signal, and the hydraulic station control device 1 and the hydraulic station 2 are installed adjacently and are both installed beside the hoist in a hoist machine room.
The hydraulic station control device 1 is internally provided with a PLC, analyzes and calculates the running state, the load size and the oil pressure value of the hoister by detecting the running speed and the position of a hoisting container of the hoister and the voltage and current of a main motor of the hoister, and sends an oil pump motor control signal, an electromagnetic valve control signal and an oil pressure control signal to the hydraulic station. When the elevator is in a normal operation state, the hydraulic station control device 1 calculates the load of the elevator according to the voltage and current data of the main motor of the elevator in the current lifting process and calculates the safe braking secondary braking oil pressure value.
The hydraulic station 2 receives the electromagnetic valve control signal and the oil pressure control signal sent by the hydraulic station control device 1, respectively realizes the states of work braking, secondary braking and primary braking and the mutual state conversion of the states, simultaneously controls the oil pressure values of the work braking, the secondary braking and the primary braking in different states, and the adjustment range of the oil pressure value of the secondary braking reaches 0-brake pad oil pressure.
The hydraulic station 2 is divided into a working brake part, a safety brake part and a working state switching part according to working states. Wherein, the service brake part includes: a working brake oil pressure gauge 20, an oil pump motor 21, an oil pump 22, an oil filter 23 and a pressure regulating proportional valve 24; the safety braking part comprises an overflow valve 25, a proportional valve 26, an energy accumulator 27, a check valve 28, a secondary braking oil pressure gauge 29 and a B pipe secondary braking delay electromagnetic valve G5; the working state switching part comprises an A-tube safety brake solenoid valve G3 and a B-tube safety brake solenoid valve G3/And a B-pipe primary brake solenoid valve G4.
Wherein the work braking part drives oil pump 22 through oil pump motor 21 and carries hydraulic oil to oil pressure delivery pipe way, and this drive oil pump import and export pipeline all is connected with oil filter 23, still be equipped with the work braking pressure regulating proportional valve 24 that is used for adjusting its interior oil pressure on the hydraulic oil delivery pipe way, work braking oil pressure gauge 20 is used for showing the oil pressure in the oil pressure delivery pipe way after work braking pressure regulating proportional valve 24 adjusts.
The safety brake part transmits the hydraulic oil transmitted by the hydraulic transmission pipeline of the working brake part to the energy accumulator 27 through the overflow valve 25 and the check valve 28 in sequence, the secondary brake oil pressure gauge 29 is used for displaying the oil pressure in the energy accumulator 27, and the secondary brake pressure regulating proportional valve 26 is used for receiving the oil pressure control signal sent by the hydraulic station control device 1 and realizing the adjustment of the oil pressure in the energy accumulator 27 according to the signal. The accumulator 27 and the one-way valve 28 are also connected with a normally open B-tube secondary braking time-delay electromagnetic valve G5.
The A-tube safety brake solenoid valve G3 and the B-tube safety brake solenoid valve G3 of the working state switching part/Are connected with a hydraulic oil conveying pipeline of the working brake part through pipelines, receive the hydraulic oil regulated by the pressure regulating proportional valve 24 and respectively convey the hydraulic oil to the A group of disc brakes and the B group of disc brakes. Wherein the A-tube safety brake solenoid valve G3 and the B-tube safety brake solenoid valve G3/The electromagnetic valves are normally closed valves, at the moment, the electromagnetic valves can be communicated with the disc brake and the working brake part, when the electromagnetic valves are disconnected in a power failure mode, the electromagnetic valves are disconnected with the working brake part, the A-tube safety brake electromagnetic valve G3 discharges hydraulic oil in the group A of disc brakes into an oil tank, and the B-tube safety brake electromagnetic valve G3/The hydraulic oil in the B-group disc brake is discharged to the accumulator 27 of the safety brake part, and the secondary brake pressure regulating proportional valve 26 regulates the oil pressure in the accumulator 27 according to the received oil pressure control signal, and discharges the redundant hydraulic oil to the cylinder. And the B pipe secondary braking delay electromagnetic valve G5 in the open state is electrified and closed after delaying for a period of time according to the received electromagnetic valve information, and the hydraulic oil in the energy accumulator 27 is discharged into the oil cylinder. In the above process, the B-pipe primary brake solenoid valve G4 connected to the B-group disc brake through the oil pressure pipe is in a disconnected state, and when the B-pipe primary brake solenoid valve G4 is de-energized and closed, the hydraulic oil in the B-group disc brake is directly discharged by the B-pipe primary brake solenoid valve G4To the oil cylinder.
When the operating state of the hydraulic station 2 is the service brake, the pipe a safety brake solenoid valve G3, the pipe B primary brake solenoid valve G4, and the pipe B safety brake solenoid valve G3 are operated according to the electromagnetic signal transmitted from the hydraulic station control device 1/All are in a power-on state, the B-pipe secondary braking delay electromagnetic valve G5 is in a power-off state, the working braking part works normally, the oil pump motor 21 drives the oil pump 22 to operate to drive the hydraulic oil in the oil tank of the hydraulic station to be divided into three paths through the oil filter 23, one path is conveyed to the A-group disc brake through the A-pipe safety braking electromagnetic valve G3, and the other path is conveyed to the A-group disc brake through the B-pipe safety braking electromagnetic valve G3/The pressure of the working brake pressure regulating proportional valve 24 is controlled to enter an A pipe safety brake solenoid valve G3 and a B pipe safety brake solenoid valve G3 according to an oil pressure signal of a hydraulic station control device/The operating brake oil pressure gauge 20 indicates the oil pressure value of the pipe A, B; the secondary brake pressure regulating proportional valve 26 controls the hydraulic pressure value of the accumulator 27 in accordance with the hydraulic signal of the hydraulic station control device, the hydraulic pressure value of the accumulator 27 is controlled by the proportional valve 26 to form a secondary brake hydraulic pressure for use in a safety braking state, and the secondary brake hydraulic pressure is displayed by the secondary brake hydraulic pressure gauge 29.
When the working state of the hydraulic station 2 is converted into the safe braking state and is the secondary braking state, the hydraulic station control device 1 sends a signal to ensure that the working braking part is powered off, namely the oil pump motor 21 and the pressure regulating proportional valve 24 are powered off, and meanwhile, the pipe A safe braking electromagnetic valve G3 and the pipe B safe braking electromagnetic valve G3 are powered off/When the brake is also powered off, the B pipe primary brake solenoid valve G4 is still powered off, and the B pipe secondary brake delay solenoid valve G5 is still in a power-off state, so that oil of the A group disc brake is discharged into an oil tank through the A pipe safety brake solenoid valve G3, and the oil pressure value is reduced to zero; b group disc brake passes through B pipe safety brake solenoid valve G3/The oil pressure is reduced to the oil pressure value of the energy accumulator 27 controlled by the secondary brake pressure regulating proportional valve 26, after a period of time delay (set working time of secondary brake), the B pipe primary brake electromagnetic valve G4 is closed after losing power, the secondary brake time delay electromagnetic valve G5 is closed after getting power, the hydraulic oil is discharged to an oil tank,so that the oil pressure in the pipe B and the oil pressure in the accumulator 27 are both reduced to zero.
When the working state of the hydraulic station 2 is converted into the safety brake and is in the primary brake state, the hydraulic station control device 1 sends signals to ensure that the working brake part is all de-energized, and the A-tube safety brake solenoid valve G3 and the B-tube safety brake solenoid valve G3 are all de-energized/The B pipe primary brake solenoid valve G4 is in a power-off state, the B pipe secondary brake delay solenoid valve G5 is powered on and closed at the moment, and the oil pressure value of the A pipe hydraulic oil is reduced to zero by draining the oil to an oil tank through G3; the oil in the tube B is drained to the oil tank through G4 to reduce the oil pressure value to zero.
The working principle of the mine hoist load follow-up secondary braking stepless pressure regulating hydraulic station of the utility model is as follows: the hydraulic station control device 1 firstly judges the operation state of the hoister according to the operation condition of the hoister, when the hoister is normal, a working brake instruction is sent to the hydraulic station 2, namely an oil pump motor 21 is electrified (the line voltage of a connecting terminal U, V, W is 380V) to drive an oil pump 22 to operate, a working brake pressure regulating proportional valve 24 is electrified (DC 8V is between the connecting terminals KT +24 and KT24, and DC24V is between KT + and KT-), the brake oil of a hydraulic station oil tank is filtered by an oil filter 23, and G3, G3/And G4 are charged (terminals G3 and G0, G3)/And between G0, G4 and G0 is DC24V), the hydraulic oil filtered by the oil filter 23 is transmitted to the disc brake through a pipe A, B, and the working brake oil pressure gauge 20 displays the brake opening oil pressure value of a pipe A, B, and the elevator is opened to operate. In the normal operation process of the elevator, the hydraulic station control device 1 detects the operation speed of the elevator, the position of an elevator container and the voltage current of a main motor of the elevator, calculates the load of the elevator in the process, calculates a safe braking secondary braking oil pressure value (normalized by an open brake oil pressure value corresponding to 8V), and sends the safe braking secondary braking oil pressure value to a secondary braking pressure regulating proportional valve 26 (DC 0-8V is arranged between a connecting terminal KT +26 and a connecting terminal KT26, and DC24V is arranged between KT + and KT-) of the hydraulic station 2 for standby secondary braking oil pressure.
When the hoist is in fault, if the hoist container runs in a section which is not close to a well mouth or a well bottom, the hydraulic station control device 1 judges that the working state of the hydraulic station 2 is a safe braking state and a secondary braking state, namely the oil pump motor 21 is in power failure (a connecting terminal U, a connecting terminal B, a connecting terminal B, a terminal B, a connecting terminal B, a terminal B, a terminal B, and a terminal B, a terminal B, a terminal B, a terminal,V, W line voltage is 0V), the oil pump 22 stops running, the working brake pressure regulating proportional valve 24 is not electrified (DC 0V is between the wiring terminals KT +24 and KT24, and DC 0V is between KT + and KT-), and the working brake pressure regulating proportional valve 24 corresponds to the internal contracting brake oil pressure, G3 and G3/Lose electricity (terminals G3 and G0 and G3)/And G0 are all DC 0V), G4 is still electrified (DC 24V is arranged between connecting terminals G4 and G0), the hydraulic oil of the disc brake controlled by the oil circuit of the pipe A directly returns to the oil tank through the pipe A and the electromagnetic valve G3, the oil pressure drop of the pipe A is zero, the disc brake is braked, and the working brake oil pressure gauge 20 displays that the oil pressure value of the brake of the pipe A is zero; g3/Oil pressure of oil way of B pipe passes through G3 after power failure/The electromagnetic valve is switched to the previously prepared second-stage brake oil pressure to work, G4 is de-energized to enable the oil pressure of a B pipe oil circuit to be zero after a time delay (the set second-stage brake working time is generally 3-5S), G5 is electrified (DC 24V is arranged between a wiring terminal G5 and a wiring terminal G0) to enable the oil pressure value of the energy accumulator 27 to be zero, and the second-stage brake pressure regulating proportional valve 26 (DC 0V is arranged between a wiring terminal KT +26 and a wiring terminal KT26 and DC 0V is arranged between KT + and KT < - >), so that the second-stage brake control process is completed.
When the elevator is in fault, if the hoisting container operates in a region close to a well mouth or a well bottom, the hydraulic station control device 1 judges that the working state of the hydraulic station 2 is a safe braking state and is a primary braking state, namely the oil pump motor 21 is out of power (the line voltage of a wiring terminal U, V, W is 0V), the oil pump 22 stops running, the working braking pressure regulating proportional valve 24 is not electrified (the line voltage between the wiring terminal KT +24 and the wiring terminal KT24 is DC 0V, and the line voltage between KT + and KT-is DC 0V) and corresponds to the brake oil pressure, G3 and G3/And G4 are all de-energized (terminals G3 and G0, G3)/And between G0 and G4 and G0 are all DC 0V), the hydraulic oil of the disc brake controlled by the oil circuit of the A pipe directly returns to the oil tank through the A pipe and the electromagnetic valve of G3, the oil pressure drop of the A pipe is zero, the disc brake is braked by the circuit, and the working brake oil pressure gauge 20 displays that the hydraulic value of the brake of the A pipe is zero; g4 loses the direct oil tank that returns of back B pipe oil circuit hydraulic oil through G4 solenoid valve after the electricity, B pipe oil pressure drop is zero, this way disk brake band-type brake, G5 is electrified (be DC24V between binding post G5 and G0) makes the oil pressure value of accumulator 27 reduce to zero, second grade braking pressure regulating proportional valve 26 (be DC 0V between binding post KT +26 and KT26, be DC 0V between KT + and KT-), so far, accomplish one-level braking control process.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the utility model as defined by the appended claims.
Claims (4)
1. The utility model provides a mine winder load follow-up secondary braking stepless pressure regulating hydraulic pressure station which characterized in that: comprises a hydraulic station and hydraulic station control devices connected by electric control signals, wherein the hydraulic station comprises a working brake part, a safety brake part and a working state switching part, wherein the working state switching part comprises a B pipe safety brake electromagnetic valve G3 communicated with a B group of disc brakes through a B pipe/A B pipe primary brake electromagnetic valve G4 and an A pipe safety brake electromagnetic valve G3 communicated with the A group disc brake through an A pipe; the safety braking part comprises an energy accumulator, a secondary braking pressure regulating proportional valve for regulating the oil pressure in the energy accumulator, and a B pipe secondary braking delay electromagnetic valve G5 and a check valve which are connected with the energy accumulator, and the other ends of the B pipe secondary braking delay electromagnetic valve G5 and the check valve are respectively connected with an oil tank and an overflow valve; the working brake part comprises an overflow valve, an A-tube safety brake solenoid valve G3 and a B-tube safety brake solenoid valve G3 which are communicated with the hydraulic oil pipeline/The working brake part is also provided with a working brake pressure regulating proportional valve for controlling the oil pressure of the hydraulic oil output by the working brake part; a pipe safety braking solenoid valve G3 can let the intraductal hydraulic oil of A to the oil tank when losing power, B pipe safety braking solenoid valve G3/Can discharge the hydraulic oil in the pipe B to an energy accumulator when power is lost, and the energy accumulator is used for maintaining the oil pressureRedundant hydraulic oil in the hydraulic oil tank is discharged to the oil tank through a proportional valve, a B pipe secondary braking delay electromagnetic valve G5 can discharge all the hydraulic oil in the energy accumulator to the oil tank when the power is on, and a B pipe primary braking electromagnetic valve G4 can discharge the hydraulic oil in the B pipe to the oil tank when the power is off; and the hydraulic station control device sends an oil pressure control signal to the hydraulic station according to the detected state information of the hoisting machine.
2. The mine hoist load-follow secondary brake stepless pressure regulating hydraulic station as claimed in claim 1, characterized in that: the hydraulic station control device analyzes and calculates the running state, the load size and the oil pressure value of the hoister by detecting the running speed of the hoister, the position of the hoisting container and the voltage current of a main motor of the hoister, and sends a motor control signal, an electromagnetic valve control signal and an oil pressure control signal to the hydraulic station.
3. The mine hoist load-follow secondary brake stepless pressure regulating hydraulic station as claimed in claim 1, characterized in that: the safety braking part is also provided with a secondary braking oil pressure gauge for displaying the oil pressure in the energy accumulator.
4. The mine hoist load-follow secondary brake stepless pressure regulating hydraulic station as claimed in claim 1, characterized in that: the working brake part is also provided with a working brake pressure regulating proportional valve for displaying the oil pressure of the hydraulic oil output by the working brake part.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122079185.8U CN215711374U (en) | 2021-08-31 | 2021-08-31 | Mine hoist load follow-up two-stage braking stepless pressure regulating hydraulic station |
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| CN202122079185.8U CN215711374U (en) | 2021-08-31 | 2021-08-31 | Mine hoist load follow-up two-stage braking stepless pressure regulating hydraulic station |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115535902A (en) * | 2022-09-16 | 2022-12-30 | 湘煤立达矿山装备股份有限公司 | Adaptive torque gate control method for hoist |
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2021
- 2021-08-31 CN CN202122079185.8U patent/CN215711374U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115535902A (en) * | 2022-09-16 | 2022-12-30 | 湘煤立达矿山装备股份有限公司 | Adaptive torque gate control method for hoist |
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