CN114083695A - Lifting device, mixing station and lifting device control method - Google Patents
Lifting device, mixing station and lifting device control method Download PDFInfo
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- CN114083695A CN114083695A CN202111372567.8A CN202111372567A CN114083695A CN 114083695 A CN114083695 A CN 114083695A CN 202111372567 A CN202111372567 A CN 202111372567A CN 114083695 A CN114083695 A CN 114083695A
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- limit
- lifting
- preset
- hopper
- hoisting mechanism
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
- B28C7/04—Supplying or proportioning the ingredients
- B28C7/06—Supplying the solid ingredients, e.g. by means of endless conveyors or jigging conveyors
- B28C7/08—Supplying the solid ingredients, e.g. by means of endless conveyors or jigging conveyors by means of scrapers or skips
- B28C7/0835—Supplying the solid ingredients, e.g. by means of endless conveyors or jigging conveyors by means of scrapers or skips using skips to be hoisted along guides or to be tilted, to charge working-site concrete mixers
- B28C7/0847—Supplying the solid ingredients, e.g. by means of endless conveyors or jigging conveyors by means of scrapers or skips using skips to be hoisted along guides or to be tilted, to charge working-site concrete mixers the skips being hoisted along vertical or inclined guides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
- B28C7/04—Supplying or proportioning the ingredients
- B28C7/06—Supplying the solid ingredients, e.g. by means of endless conveyors or jigging conveyors
- B28C7/08—Supplying the solid ingredients, e.g. by means of endless conveyors or jigging conveyors by means of scrapers or skips
- B28C7/0835—Supplying the solid ingredients, e.g. by means of endless conveyors or jigging conveyors by means of scrapers or skips using skips to be hoisted along guides or to be tilted, to charge working-site concrete mixers
- B28C7/087—Parts; Accessories, e.g. safety devices
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- 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
- B66D1/42—Control devices non-automatic
- B66D1/46—Control devices non-automatic electric
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- 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
- B66D1/54—Safety gear
- B66D1/56—Adaptations of limit switches
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Control And Safety Of Cranes (AREA)
Abstract
本发明公开一种提升装置、搅拌站及提升装置控制方法，该提升装置包括提升轨道、提升料斗、卷扬机构和控制模块；提升料斗可移动地设于提升轨道上；卷扬机构用于驱动提升料斗升降；控制模块内设有上升预设时间和下降预设时间，控制模块用于在卷扬机构开始上升时计时，当卷扬机构的上升时间达到上升预设时间仍未停止时控制卷扬机构停机，在卷扬机构开始下降时计时，当卷扬机构的下降时间达到下降预设时间仍未停止时控制卷扬机构停机。本发明的提升装置、搅拌站及提升装置控制方法中，在提升料斗上升或下降过程中，由于卷扬机构运行超过预设时间时会控制卷扬机构停机，可降低提升装置冲顶或反卷的发生几率，从而大大提高运行的安全性。
The invention discloses a lifting device, a mixing station and a control method for the lifting device. The lifting device comprises a lifting track, a lifting hopper, a hoisting mechanism and a control module; the lifting hopper is movably arranged on the lifting track; the hoisting mechanism is used to drive the lifting hopper Lifting; the control module is provided with a preset ascending time and a preset descending time. The control module is used to time when the hoisting mechanism starts to ascend. When the ascending time of the hoisting mechanism reaches the preset ascending time and still does not stop, it controls the hoisting mechanism to stop. When the hoisting mechanism starts to descend, it is timed, and the hoisting mechanism is controlled to stop when the descending time of the hoisting mechanism reaches the preset descending time and does not stop. In the hoisting device, the mixing station and the hoisting device control method of the present invention, during the ascending or descending process of the hoisting hopper, the hoisting mechanism will be controlled to stop when the hoisting mechanism runs for more than a preset time, which can reduce the occurrence probability of the hoisting device hitting the top or being reversed. , thereby greatly improving the safety of operation.
Description
Technical Field
The invention relates to the technical field of mixing stations, in particular to a lifting device, a mixing station and a lifting device control method.
Background
The mixing station is used for mixing and mixing concrete, is also called as a concrete mixing station, and is suitable for large-scale infrastructure construction projects such as urban and rural commodity premixed concrete, roads and bridges, water conservancy projects, airports, ports and the like and places with large demand of concrete.
A winch lifting device of the bucket loading mixing station is a key part of the whole station, and the reliability of the winch lifting device directly influences the overall performance of the mixing station. At present, a hoisting device of a bucket loading mixing plant is generally hoisted by a steel wire rope, and a limiting device is arranged to control the starting and stopping of the hoisting device. However, the steel wire rope of the hoisting device has no detection in the using process, the service life is short, the faults of back rolling of the steel wire rope, pulling and deflection of the hopper to the top and the like are easy to occur, and even the safety accidents of falling of the hopper and the like are caused.
Disclosure of Invention
The invention aims to provide a lifting device with high safety, a mixing plant and a lifting device control method.
The invention provides a lifting device, which comprises a lifting track, a lifting hopper, a hoisting mechanism and a control module, wherein the lifting track is arranged on the lifting hopper; the lifting hopper is movably arranged on the lifting track; the hoisting mechanism is used for driving the lifting hopper to lift; the control module is internally provided with a rising preset time and a falling preset time, and is used for timing when the hoisting mechanism starts rising, controlling the hoisting mechanism to stop when the rising time of the hoisting mechanism reaches the rising preset time and is not stopped, timing when the hoisting mechanism starts falling, and controlling the hoisting mechanism to stop when the falling time of the hoisting mechanism reaches the falling preset time and is not stopped.
In one embodiment, the lifting device further comprises a limiting mechanism, the lifting hopper is provided with an induction plate for inducing the limiting mechanism, the limiting mechanism comprises an upper working limiting element, an upper limit limiting element, a lower working limiting element and a lower limit limiting element, the lower working limiting element and the lower limit limiting element are arranged at the lower part of the lifting track, the upper working limiting element and the upper limit limiting element are arranged at the upper part of the lifting track, and the upper working limiting element and the lower working limiting element are positioned between the lower limit limiting element and the upper limit limiting element;
the control module is connected to the upper working limiting element, the upper limiting element, the lower working limiting element and the lower limiting element, and is further used for controlling the hoisting mechanism to stop when one of the upper working limiting element, the upper limiting element, the lower working limiting element and the lower limiting element senses the sensing plate, wherein the rising preset time is longer than the time required by sensing the upper limiting element when the lifting hopper starts rising, and the falling preset time is longer than the time required by sensing the lower limiting element when the lifting hopper starts falling.
In one embodiment, the hoisting mechanism comprises a steel wire rope and a force measuring sensor, the steel wire rope is connected to the lifting hopper, the force measuring sensor is used for measuring the tensile force borne by the steel wire rope, the control module is connected to the force measuring sensor, a preset lower limit value of the tensile force is arranged in the control module, and the control module is used for controlling the hoisting mechanism to stop when the tensile force value measured by the force measuring sensor is smaller than the preset lower limit value of the tensile force; the descending preset time is longer than the time required by the lifting hopper to touch the ground when the lifting hopper starts descending.
In one embodiment, the upper working limiting element and the induction plate are two respectively, and the upper working limiting element is arranged at the same height and two on the lifting track, the induction plate is arranged at the same height on the lifting hopper, a first preset time interval is further arranged in the control module, in the lifting process of the lifting hopper, the control module is further used for obtaining two, the upper working limiting element senses the first time interval of the induction plate, when the first time interval is larger than or equal to the first preset time interval, the control module judges at least one of the upper working limiting element, and when the first time interval is smaller than the first preset time interval, the lifting device works normally.
In an embodiment of the disclosure, the number of the lower working limiting elements and the number of the sensing plates are two, the two lower working limiting elements are disposed at the same height on the lifting track, the two sensing plates are disposed at the same height on the lifting hopper, a second preset time interval is further disposed in the control module, during the descending process of the lifting hopper, the control module is further configured to obtain a second time interval at which the two lower working limiting elements sense the sensing plates, when the second time interval is greater than or equal to the second preset time interval, the control module determines that at least one of the lower working limiting elements is faulty, and when the second time interval is less than the second preset time interval, the lifting device works normally.
In one embodiment, the hoisting mechanism comprises two steel wire ropes, the two steel wire ropes are respectively connected to the lifting hopper, the number of the force measuring sensors is two, the two force measuring sensors are respectively used for measuring the tensile forces borne by the two steel wire ropes, a preset tensile force upper limit value, a preset tensile force lower limit value and a preset tensile force difference value are further arranged in the control module, and when the two force measuring sensors have different measured tensile force values and the tensile force difference value measured by the two force measuring sensors is larger than the preset tensile force difference value in the lifting process of the lifting hopper, the control module judges that at least one steel wire rope fails; when the tension values measured by the two force measuring sensors are the same and the tension difference value is smaller than the preset tension difference value, the control module controls the lifting device to normally operate; when the tension values measured by the two force measuring sensors are both larger than the preset tension upper limit value, the control module controls the hoisting mechanism to stop and judges that the upper working limit element and the upper limit element have faults; when the tension values measured by the two force measuring sensors are smaller than the preset tension lower limit value, the control module controls the hoisting mechanism to stop and judges that the lower working limit element and the lower limit element have faults.
In one embodiment, the lifting hopper comprises a pulley assembly comprising two pulleys; the hoisting mechanism comprises a rack, a driving device, a winding drum, a support and two steel wire ropes, wherein the driving device, the winding drum and the support are all arranged on the rack, one ends of the two steel wire ropes are respectively fixed at two ends of the winding drum and respectively pass over two pulleys of the pulley assembly of the lifting hopper, and the other ends of the two steel wire ropes are respectively connected with the support; the support comprises a multidirectional fork head, a first pin shaft, a balance beam, a second pin shaft and joints, the multidirectional fork head is rotatably connected to the rack through the first pin shaft, the balance beam is rotatably connected to the multidirectional fork head through the second pin shaft, the joints are respectively connected with the balance beam, and the second pin shaft is located between the joints.
The invention also discloses a mixing plant, which comprises the lifting device.
The invention also discloses a lifting device control method, which is used for controlling the lifting device, the lifting device comprises a lifting track, a lifting hopper and a hoisting mechanism, the lifting hopper is movably arranged on the lifting track, the hoisting mechanism is used for driving the lifting hopper to lift, and the lifting device control method comprises the following steps:
starting the lifting device, lifting the lifting hopper, and starting timing;
comparing the rising time with preset rising time, and when the rising time reaches the preset rising time, controlling the hoisting mechanism to stop, and stopping the rising of the hoisting hopper;
starting the lifting device, descending the lifting hopper and starting timing;
and comparing the descending time with preset descending preset time, and controlling the winding mechanism to stop when the descending time reaches the preset descending time.
In one embodiment, the lifting device further comprises a limiting mechanism, an induction plate is arranged on the lifting hopper to induce the limiting mechanism, the hoisting mechanism comprises a steel wire rope and a force transducer, the force transducer is used for measuring the pulling force borne by the steel wire rope, the limiting mechanism comprises an upper working limiting element, an upper limit limiting element, a lower working limiting element and a lower limit limiting element, the lower working limiting element and the lower limit limiting element are installed at the lower part of the lifting track, the upper working limiting element and the upper limit limiting element are installed at the upper part of the lifting track, and the upper working limiting element and the lower working limiting element are located between the lower limit limiting element and the upper limit limiting element; the lifting device control method further includes:
in the ascending process of the lifting hopper, acquiring a signal induced by the upper working limiting element or the upper limit limiting element and the induction plate, controlling the hoisting mechanism to stop when acquiring the signal induced by the upper working limiting element or the upper limit limiting element and the induction plate, stopping the ascending of the lifting hopper, and unloading when acquiring the signal induced by the upper working limiting element and the induction plate;
in the descending process of the lifting hopper, acquiring a signal induced by the lower working limiting element or the lower limiting element and the induction plate, acquiring the stress of the steel wire rope, controlling the hoisting mechanism to stop when acquiring the signal induced by the lower working limiting element or the lower limiting element and the induction plate, or controlling the hoisting mechanism to stop when the stress of the steel wire rope is smaller than a preset lower tension limit value, and feeding when acquiring the signal induced by the lower working limiting element and the induction plate;
the preset ascending time is longer than the time required by the lifting hopper to start ascending timing to sense the upper limit limiting element, and the preset descending time is longer than the time required by the lifting hopper to start descending timing to sense the lower limit limiting element.
In one embodiment, the number of the upper working limiting elements is two, the two upper working limiting elements are arranged at the same height on the lifting track, the two sensing plates are arranged at the same height on the lifting hopper, and the control method of the lifting device further includes:
in the ascending process of the lifting hopper, acquiring a first time interval at which two upper working limiting elements sense the induction plate, judging that at least one upper working limiting element has a fault when the first time interval is greater than or equal to a preset first preset time interval, and enabling the lifting device to normally work when the first time interval is smaller than the first preset time interval;
or, the number of the lower working limiting elements is two, the two lower working limiting elements are arranged at the same height on the lifting track, the two induction plates are arranged at the same height on the lifting hopper, and the control method of the lifting device further comprises the following steps:
and in the descending process of the lifting hopper, acquiring two second time intervals at which the lower working limiting elements sense the induction plate, judging that at least one lower working limiting element has a fault when the second time intervals are greater than or equal to a second preset time interval, and when the second time intervals are smaller than the second preset time interval, normally working the lifting device.
In one embodiment, the hoisting mechanism includes two steel wire ropes, the two steel wire ropes are respectively connected to the hoisting hopper, the number of the force sensors is two, and the two force sensors respectively measure the tensile forces applied to the two steel wire ropes, and the hoisting device control method further includes:
comparing the tension values of the two force sensors with a preset tension value upper limit, a preset tension value lower limit, the difference between the tension values of the two force sensors and a preset tension difference value, and judging that at least one steel wire rope fails when the tension values measured by the two force sensors are different and the tension difference value measured by the two force sensors is greater than the preset tension difference value; when the tension values measured by the two force measuring sensors are the same and the tension difference value is smaller than the preset tension difference value, controlling the lifting device to normally operate; when the tension values measured by the two force measuring sensors are both larger than the preset tension upper limit value, controlling the hoisting mechanism to stop, and judging that the upper working limit element and the upper limit element have faults; and when the tension values measured by the two force measuring sensors are smaller than the preset tension lower limit value, controlling the hoisting mechanism to stop, and judging that the lower working limit element and the lower limit element have faults.
According to the lifting device, the stirring station and the lifting device control method provided by the embodiment of the invention, in the process of ascending or descending the lifting hopper, the hoisting mechanism is controlled to stop when the operation time of the hoisting mechanism exceeds the preset time, so that the occurrence probability of top rushing or back rolling of the lifting device can be reduced, and the operation safety is greatly improved.
Drawings
Fig. 1 is a schematic structural diagram of a lifting device according to an embodiment of the present invention.
Fig. 2 is a schematic view of the construction of the lifting hopper of the lifting device of fig. 1.
Fig. 3 is a schematic structural view of a winding mechanism of the lifting device shown in fig. 1.
Fig. 4 is a schematic structural diagram of a limiting mechanism of the lifting device shown in fig. 1.
Fig. 5 is a block schematic diagram of some of the elements of the lifting device of fig. 1.
Detailed Description
The foregoing and other technical matters, features and effects of the present invention will be apparent from the following detailed description of preferred embodiments, which is to be read in connection with the accompanying drawings. While the present invention has been described in connection with the preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but is intended to cover various modifications, equivalent arrangements, and specific embodiments thereof.
In this document, the terms "first," "second," "third," "fourth," "fifth," etc., if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
In this document, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", and the like (if any) are used in the description to describe the positions of structures in the drawings and the positions of the structures relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the present application.
As used herein, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, including not only those elements listed, but also other elements not expressly listed.
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, features and effects of the display device and the color display method according to the present invention will be given with reference to the accompanying drawings and preferred embodiments.
Fig. 1 is a schematic structural diagram of a lifting device according to an embodiment of the present invention. Referring to fig. 1, in the present embodiment, the lifting device includes a lifting rail 11, a lifting hopper 13, a hoisting mechanism 15, and a limiting mechanism (not shown).
In this embodiment, the lifting rail 11 is fixed on the frame of the mixing station and inclines a certain angle relative to the ground. Specifically, be equipped with spout 112 on promoting track 11, spout 112 includes the ascending section, crooked section and emptys the section, the ascending section inclines certain angle relative to ground, can extend along the extending direction who promotes track 11, crooked section is connected between ascending section and the section of empting, the section of empting can be on a parallel with ground basically, when promoting hopper 13 and rise along the ascending section and advance to the section of empting, because the section of empting is on a parallel with ground, consequently promote hopper 13 and overturn thereupon, can pour the material in the feed bin 30 of mixing plant from promoting hopper 13, realize unloading.
Specifically, the lifting rail 11 is further provided with a slide way, and the extending direction of the slide way is the same as the extending direction of the lifting rail 11.
In this embodiment, the lifting hopper 13 is movably disposed on the lifting rail 11. Specifically, referring to fig. 2, the lifting hopper 13 includes a swing arm 132, a hopper body 134, a pulley assembly 136, and a roller shaft 137. The swing arm 132 comprises two arm bodies 1322 and a connecting member 1324, the two arm bodies 1322 are respectively connected to two ends of the connecting member 1324, one ends of the two arm bodies 1322 are respectively installed at two ends of the roller shaft 137, the roller shaft 137 is fixed on the bucket body 134, the pulley assembly 136 is installed on the connecting member 1324 of the swing arm 132, and the rollers at two ends of the roller shaft 137 are respectively located in the sliding groove 112. Specifically, the swing arm 132 is also provided with a roller, and the roller on the swing arm 132 is located in the slide way of the lifting rail 11. When the lifting hopper 13 moves along the lifting rail 11, the rollers on the roller shafts 137 move along the sliding grooves 112 of the lifting rail 11, and the rollers on the swing arms 132 move along the sliding ways of the lifting rail 11.
Specifically, the pulley assembly 136 includes two pulleys to wind different wire ropes, respectively.
Specifically, the lifting hopper 13 is provided with a sensing plate 139 for sensing the position limiting mechanism. Specifically, two induction plates 139 are symmetrically installed on both sides of the lifting hopper 13. More specifically, the two induction plates 139 are mounted on the two arms 1322, respectively, and are located at the same height on the lifting hopper 13.
In this embodiment, the hoisting mechanism 15 is used for driving the lifting hopper 13 to ascend and descend, and referring to fig. 3, the hoisting mechanism 15 includes a frame 150, a driving device 152, a winding drum 153, a bracket 154, and a wire rope 155. The driving device 152, the winding drum 153 and the bracket 154 are all arranged on the frame 150, one end of each of the two wire ropes 155 is respectively fixed at two ends of the winding drum 153 and respectively bypasses two pulleys of the pulley assembly 136 of the lifting hopper 13, and the other end of each of the two wire ropes is respectively connected with the bracket 154. In this embodiment, the two steel wire ropes 155 pull the lifting hopper 13 to move up and down along the lifting rail 11, the two steel wire ropes 155 are simultaneously stressed, the stress of a single steel wire rope 155 is reduced by half, the service life of the steel wire rope 155 is prolonged by more than 2 times, and the two steel wire ropes 155 are respectively and independently connected to the winding drum 153 and respectively wound on different pulleys of the pulley assembly 136 of the lifting hopper 13, so that when one steel wire rope 155 is broken, the other steel wire rope can still pull the lifting hopper 13, and the lifting hopper 13 is thoroughly prevented from falling. It is understood that there may be only one wire rope 155, and in this case, there is only one corresponding pulley.
Specifically, the hoisting mechanism 15 further includes a drum support 156, the drum support 156 is fixed to the frame 150, and the driving device 152 and the drum 153 are mounted on the drum support 156, so that the driving device 152 and the drum 153 are mounted on the frame 150 through the drum support 156.
Specifically, the bracket 154 includes a multi-directional fork 1542, a first pin 1543, a balance beam 1544, a second pin 1545 and a joint 1546, the multi-directional fork 1542 is rotatably connected to the frame 150 by the first pin 1543, the balance beam 1544 is rotatably connected to the multi-directional fork 1542 by the second pin 1545, the two joints 1546 are respectively connected to the balance beam 1544, and the second pin 1545 is located between the two joints 1546.
Specifically, the cradle 154 further includes two load cells 1547 for measuring the tension applied to the two steel cables 155, respectively. Specifically, load cell 1547 is a pin-type load cell, and two joints 1546 are connected to balance beam 1544 through pin-type load cells, respectively.
In this embodiment, referring to fig. 4 together, the limiting mechanism includes an upper working limiting element 172, an upper limiting element 173, a lower working limiting element 174 and a lower limiting element 175, the lower working limiting element 174 is installed at the lower portion of the lifting rail 11, that is, the lower working limiting element 174 corresponds to the sensing plate 139 when the lifting hopper 13 is at the receiving position, the upper working limiting element 172 is installed at the upper portion of the lifting rail 11, that is, the lifting hopper 13 is at the discharging position (that is, the lifting hopper 13 is at the dumping section of the chute 112), the upper working limiting element 172 corresponds to the sensing plate 139, the lower limiting element 175 and the upper limiting element 173 are installed at the lower portion and the upper portion of the lifting rail 11, respectively, and are close to the lower and upper working limiting elements 174, 172, respectively, and the upper working limiting element 172 and the lower limiting element 174 are located between the lower limiting element 175 and the upper limiting element 173, the position limiting members respectively sense the sensing plates 139 of the elevator hopper 13, so that whether the elevator hopper 13 is in place can be sensed.
Specifically, there are two upper working limit elements 172, to correspond respectively to the two induction plates 139 on the lifting hopper 13; the lower work limit members 174 are two, and correspond to the two sensor plates 139 of the elevator hopper 13, respectively. The two upper work limiting elements 172 are located at the same height on the lifting rail 11, respectively, and the two lower work limiting elements 174 are located at the same height on the lifting rail 11, respectively.
In this embodiment, referring to fig. 5, the lifting device further includes a control module 19, the control module 19 is connected to the upper working limiting element 172, the upper limiting element 173, the lower working limiting element 174, and the lower limiting element 175, and the control module 19 is configured to control the lifting mechanism 15 to stop when one of the upper working limiting element 172, the upper limiting element 173, the lower working limiting element 174, and the lower limiting element 175 senses the sensing plate 139. Normally, the lifting hopper 13 should stop running under the control of the hoisting mechanism 15 when the upper working limiting element 172 senses the sensing plate 139 during the ascending process, and start discharging, and when the upper working limiting element 172 fails, the lifting hopper 13 should stop under the control of the hoisting mechanism 15 when the upper limiting element 173 senses the sensing plate 139; the elevator hopper 13 should be stopped under the control of the winding mechanism 15 and starts to feed when the lower operation limiting member 174 senses the sensing plate 139 during the lowering, and the elevator hopper 13 should be stopped under the control of the winding mechanism 15 when the lower operation limiting member 174 malfunctions and when the lower limit limiting member 175 senses the sensing plate 139. The upper limit limiting element 173 and the lower limit limiting element 175 provide fault protection.
In this embodiment, a rising preset time T1 and a falling preset time T2 are provided in the control module 19, the control module 19 is configured to time when the hoisting mechanism 15 starts to rise, control the hoisting mechanism 15 to stop and alarm when the rising time of the hoisting mechanism 15 reaches the rising preset time T1 and does not stop yet, prompt to check the upper working limit element 172 and the upper limit element 173, and remove the fault, time when the hoisting mechanism 15 starts to fall, control the hoisting mechanism 15 to stop and alarm when the falling time of the hoisting mechanism 15 reaches the falling preset time T2 and does not stop yet, prompt to check the lower working limit element 174, the lower limit element 175, and the force sensor 1547, and remove the fault. Generally, the rising preset time T1 and the falling preset time T2 are respectively longer than the time required for the elevator hopper 13 to travel beyond the upper limit limiting element 173 and the lower limit limiting element 175 without reaching the ram and rewind positions, and when the elevator hopper 13 exceeds the upper limit limiting element 173 or the lower limit limiting element 175 and even does not stop touching the ground, it indicates that the upper working limiting element 172, the upper limit limiting element 173, the lower working limiting element 174, the lower limit limiting element 175 and the load cell 1547 are in failure, and the stop of the elevator hopper 13 needs to be controlled by the operating time of the elevator hopper 13 to avoid danger. It will be appreciated that in another embodiment, the upper working limit element 172, the upper limit element 173, the lower working limit element 174 and the lower limit element 175 may not be provided, and the lifting device directly controls the stopping of the winding mechanism 15 according to the rising preset time T1 and the falling preset time T2.
In this embodiment, the control module 19 is further provided with a first preset time interval T3, during the ascending process of the elevator hopper 13, the control module 19 is further configured to obtain a first time interval when the two upper working limiting elements 172 sense the sensing plate 139, when the first time interval is greater than or equal to the first preset time interval T3, it is indicated that at least one of the upper working limiting elements 172 has a fault, the control module 19 gives an alarm, and prompts to check the two upper working limiting elements 172, so as to remove the fault, and when the first time interval is smaller than the first preset time interval T3, the elevator apparatus operates normally. Normally, the sensing plates 139 should be sensed simultaneously by the two upper operation limiting members 172, and it is considered normal when the sensing plates 139 are sensed by the two upper operation limiting members 172 less than the first preset time interval T3 apart in consideration of the allowable mounting and component errors. Specifically, the control module 19 may record the time points at which the two upper working limit elements 172 sense the sensing plate 139, and calculate the time interval between the two time points, thereby obtaining the first time interval.
In this embodiment, the control module 19 is further provided with a second preset time interval T4, and during the descending process of the elevator hopper 13, the control module 19 is further configured to obtain a second time interval when the two lower operation limiting elements 174 sense the sensing plate 139, and when the second time interval is greater than or equal to the second preset time interval T4, it is indicated that at least one of the lower operation limiting elements 174 is faulty, the control module 19 gives an alarm and prompts to check the two lower operation limiting elements 174, and when the second time interval is less than the second preset time interval T4, the elevator apparatus operates normally. Normally, the sensing plates 139 should be sensed simultaneously by the two lower operation limiting members 174, and it is considered normal when the sensing plates 139 are sensed by the two lower operation limiting members 174 at a time interval less than the second preset time interval T4 in consideration of the allowable mounting and component errors. Specifically, the control module 19 may record the time points at which the lower working limit elements 174 sense the sensing plate 139, and calculate the time interval between the two time points, thereby obtaining the second time interval.
In this embodiment, the control module 19 is further connected to the force sensors 1547, a preset upper tension limit value, a preset lower tension limit value and a preset tension difference value are further arranged in the control module 19, and when the tension values measured by the two force sensors 1547 are different and the tension difference value measured by the two force sensors 1547 is greater than the preset tension difference value in the ascending process of the lifting hopper 13, it is indicated that the steel wire rope on one side is stuck, the control module 19 gives an alarm and prompts to remove a fault; when the tension values measured by the two force sensors 1547 are the same and the tension difference value is smaller than the preset tension difference value, the control module 19 controls the lifting device to normally operate; when the tension values measured by the two force sensors 1547 are both greater than the preset upper tension value, which indicates that the limiting mechanisms (i.e., the upper working limiting element 172 and the lower limiting element 173) are damaged, the lifting hopper 13 is ejected, the control module 19 controls the hoisting mechanism 15 to stop, gives an alarm and prompts troubleshooting; when the tension values measured by the two force sensors 1547 are both smaller than the preset lower tension limit value, which indicates that the limiting mechanisms (i.e., the lower working limiting element 174 and the lower limiting element 175) are damaged, the lifting hopper 13 touches the ground, the control module 19 controls the hoisting mechanism 15 to stop, and gives an alarm and prompts troubleshooting.
The invention also provides a mixing plant, which comprises the lifting device.
The invention also provides a lifting device control method, which is used for controlling the lifting device, the lifting device comprises a lifting rail 11, a lifting hopper 13 and a hoisting mechanism 15, the lifting hopper 13 is movably arranged on the lifting rail 11, the hoisting mechanism 15 is used for driving the lifting hopper 13 to lift, and the lifting device control method comprises the following steps:
s11, starting the lifting device, lifting the hopper 13 to ascend, and starting timing;
s13, comparing the rising time with preset rising preset time T1, and controlling the hoisting mechanism 15 to stop when the rising time reaches preset rising time T1, and stopping the rising of the lifting hopper 13;
s15, starting the lifting device, lifting the hopper 13 to descend, and starting timing;
and S17, comparing the descending time with the preset descending preset time T2, and controlling the winding mechanism 15 to stop when the descending time reaches the preset descending time T2.
It is understood that S11 and S15 are not in sequence.
Specifically, the lifting device further comprises a limiting mechanism, the lifting hopper 13 is provided with an induction plate 139 for inducing the limiting mechanism, the hoisting mechanism 15 comprises a steel wire rope 155 and a load cell 1547 for measuring the tension force applied to the steel wire rope 155, the limiting mechanism comprises an upper working limiting element 172, an upper limit limiting element 173, a lower working limiting element 174 and a lower limit limiting element 175, the lower working limiting element 174 and the lower limit limiting element 175 are installed at the lower part of the lifting rail 11, the upper working limiting element 172 and the upper limit limiting element 173 are installed at the upper part of the lifting rail 11, and the upper working limiting element 172 and the lower working limiting element 174 are located between the lower limit limiting element 175 and the upper limit limiting element 173.
Step S13 further includes: and acquiring signals sensed by the upper working limiting element 172 or the upper limit limiting element 173 and the sensing plate 139, controlling the hoisting mechanism 15 to stop when acquiring the signals sensed by the upper working limiting element 172 or the upper limit limiting element 173 and the sensing plate 139, stopping the hoisting hopper 13 from ascending, and discharging when acquiring the signals sensed by the upper working limiting element 172 and the sensing plate 139.
Specifically, the lifting hopper 13 first reaches the position of the upper working limit element 172, and when the upper working limit element 172 is normal, the hoisting mechanism 15 is controlled to stop and unload; when the upper working limit element 172 fails and does not generate a signal sensed by the sensing plate 139, the lifting hopper 13 continues to ascend, and when the lifting hopper 13 reaches the position of the upper limit element 173, when the upper limit element 173 is normal, the hoisting mechanism 15 is controlled and controlled to stop; when the upper limit limiting element 173 fails and does not generate a signal sensed by the sensing plate 139, the elevator hopper 13 continues to ascend, and when the timed ascending time reaches the ascending preset time T1, the hoisting mechanism 15 is controlled to stop. Therefore, the top impact can be fully prevented, the lifting hopper is prevented from falling, and the production can be manually recovered after the fault is confirmed to be eliminated.
Specifically, step S17 further includes: and acquiring signals sensed by the lower working limiting element 174 or the lower limiting element 175 and the sensing plate 139, acquiring the stress of the steel wire rope 155, controlling the hoisting mechanism 15 to stop when acquiring the signals sensed by the lower working limiting element 174 or the lower limiting element 175 and the sensing plate 139 or controlling the steel wire rope 155 to be stressed less than a preset lower tension limit value, and feeding when acquiring the signals sensed by the lower working limiting element 174 and the sensing plate 139.
Specifically, the lifting hopper 13 firstly reaches the position of the lower working limit element 174, and when the lower working limit element 174 is normal, the control controls the hoisting mechanism 15 to stop, so that the lifting hopper 13 stops descending and carries out unloading; when the lower working limit element 174 has a fault and does not generate a signal sensed by the sensing plate 139, the lifting hopper 13 continues to descend, and when the lifting hopper 13 reaches the position of the lower limit element 175, the lower limit element 175 is normal, the hoisting mechanism 15 is controlled to stop, and the lifting hopper 13 stops descending; when the lower limit limiting element 175 fails and does not generate a signal sensed by the sensing plate 139, the lifting hopper 13 continues to descend, and when the force sensor 1547 is normal, the measured stress of the steel wire rope is smaller than the preset lower limit of the pulling force, which indicates that the lifting hopper 13 touches the ground and controls the hoisting mechanism 15 to stop; when the load cell 1547 fails and does not acquire a correct steel wire rope stress, the hoisting mechanism 15 continues to work, the steel wire rope may be rewound, and when the timed descending time reaches the descending preset time T1, the hoisting mechanism 15 is controlled to stop. Thus, the steel wire rope can be prevented from being rewound as much as possible, and production can be manually resumed after the fault is confirmed to be eliminated.
In this embodiment, there are two upper working limit elements 172 and two sensing plates 139, the two upper working limit elements 172 are located at the same height on the lifting rail 11, and the two sensing plates 139 are located at the same height on the lifting hopper 13, and the lifting device control method further includes:
s19, in the ascending process of the lifting hopper 13, acquiring a first time interval when the two upper working limiting elements 172 sense the induction plate 139, when the first time interval is greater than or equal to a preset first preset time interval T3, indicating that at least one of the upper working limiting elements 172 has a fault, giving an alarm, prompting to check the two upper working limiting elements 172, eliminating the fault, and when the first time interval is less than the first preset time interval T3, the lifting device works normally.
In this embodiment, there are two lower operation limiting elements 174, and the two lower operation limiting elements 174 are located at the same height on the lifting rail 11, and the method for controlling the lifting device further includes:
s21, during the descending process of the elevator hopper 13, a second time interval is obtained when the two lower operation limiting elements 174 sense the sensing plate 139, when the second time interval is greater than or equal to a second preset time interval T4, it is indicated that at least one of the lower operation limiting elements 174 is faulty, an alarm is issued, and it is prompted to check the two lower operation limiting elements 174, and when the second time interval is less than the second preset time interval T4, the elevator apparatus operates normally.
In this embodiment, the hoisting mechanism 15 includes two steel wire ropes 155, the number of the force sensors 1547 is two, and the two steel wire ropes 155 are respectively measured for tensile force, and the control method of the hoisting device further includes:
s23, comparing the tension values of the two force sensors 1547 with a preset tension value upper limit, a preset tension value lower limit, the difference between the tension values of the two force sensors 1547 and a preset tension difference value, when the tension values measured by the two force sensors 1547 are different and the tension difference value measured by the two force sensors 1547 is greater than the preset tension difference value, indicating that the steel wire rope on one side is blocked, alarming and prompting to remove the fault; when the tension values measured by the two force sensors 1547 are the same and the tension difference value is smaller than the preset tension difference value, controlling the lifting device to normally operate; when the tension values measured by the two force sensors 1547 are both larger than the preset upper tension value, indicating that the limiting mechanisms (the upper working limiting element and the upper limit limiting element) are damaged, lifting the hopper 13 to impact the top, controlling the hoisting mechanism 15 to stop, giving an alarm and prompting to remove the fault; when the tension values measured by the two force sensors 1547 are both smaller than the preset lower tension limit value, the limit mechanisms (the lower working limit element and the lower limit element) are damaged, the lifting hopper 13 touches the ground, the hoisting mechanism 15 is controlled to stop, an alarm is given, and the fault removal is prompted.
According to the lifting device, the stirring station and the lifting device control method provided by the embodiment of the invention, in the process of ascending or descending the lifting hopper, the hoisting mechanism is controlled to stop when the operation time of the hoisting mechanism exceeds the preset time, so that the occurrence probability of top rushing or back rolling of the lifting device can be reduced, and the operation safety is greatly improved.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
Although the present invention has been described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the present invention.
Claims (12)
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| CN202111372567.8A CN114083695A (en) | 2021-11-18 | 2021-11-18 | Lifting device, mixing station and lifting device control method |
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| CN202111372567.8A CN114083695A (en) | 2021-11-18 | 2021-11-18 | Lifting device, mixing station and lifting device control method |
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