CN206051333U - Crane grab control device - Google Patents
Crane grab control device Download PDFInfo
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- CN206051333U CN206051333U CN201620776791.1U CN201620776791U CN206051333U CN 206051333 U CN206051333 U CN 206051333U CN 201620776791 U CN201620776791 U CN 201620776791U CN 206051333 U CN206051333 U CN 206051333U
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Abstract
This utility model is related to a kind of crane grab control device, it is characterised in that including chopper, converter and grab bucket motor；The input of the converter is connected with the chopper；The outfan of the converter is connected with the grab bucket motor.Crane grab control device of the present utility model, motor of grabbing bucket is controlled due to using converter, thus motor overload phenomenon caused by frequently commutation can be solved, and the failure problems caused by electromagnetic valve when being opened and closed of grabbing bucket by solenoid valve control can be avoided, the normal operation of garbage grab bucket crane can be better ensured that.
Description
Technical field
This utility model is related to control technology field of grabbing bucket, more particularly to a kind of crane grab control device.
Background technology
Garbage grab bucket crane is different from general bridge grabbing crane, and whether its running can successfully be directly connected to
The operation of whole power plant.
, mainly there are two kinds of control modes in the grab bucket mechanism of the garbage grab bucket crane for using at present：Motor positive and inverse is controlled
The mode of grab bucket opening and closing and the mode of solenoid valve control grab bucket opening and closing.Wherein, the mode of motor positive and inverse control grab bucket opening and closing
Grab bucket motor need to be supplied to by three 380V alternating currents, change phase sequence to carry out positive anti-switching.But fed intake as rubbish hangs
The practical situation of journey, during a dosing operation, can carry out No. more than the ten positive anti-switchings of motor at short notice, cause motor
Heating is serious even to burn out motor.Although the mode of solenoid valve control grab bucket opening and closing can solve asking for the forward and reverse switching of motor
Inscribe, i.e., which needs Unidirectional, but which needs three control lines of offer in addition to power to opening closed electromagnetic valve respectively, increased
Core number and grab bucket cable diameter, objectively say and increased trouble point.
Thus, one of existing technical problem urgently to be resolved hurrily is：How to solve existing motor positive and inverse control mode to hold
It is easily caused grab bucket the motor feels hot serious, even results in the problem for burning out motor, and solenoid valve control mode increased trouble point,
The problem of easy initiating failure.
Utility model content
In order to solve above-mentioned technical problem, the utility model proposes a kind of crane grab control device, the device includes
Chopper, converter and grab bucket motor；
The input of the converter is connected with the chopper；The outfan of the converter and the grab bucket motor phase
Even.
Alternatively, the chopper includes air-break.
Alternatively, the converter includes a brake unit.
Alternatively, the brake unit includes a braking resistor.
Alternatively, described device also includes control device；
The control device is connected with the converter.
Alternatively, the control device includes PLC.
Alternatively, the control model of the PLC includes frequency converter failure pattern and converter operational mode.
Alternatively, the PLC includes abs；
Correspondingly, the control model of the PLC includes air switch protected mode.
Alternatively, described device also includes electric supply installation；
The electric supply installation is connected with the converter by the chopper.
Alternatively, the voltage of the electric supply installation is 380V.
Crane grab control device of the present utility model, including chopper, converter and grab bucket motor, and it is described
The input of converter is connected with the chopper, and the outfan of the converter is connected with the grab bucket motor, due to adopting
Converter is controlling motor of grabbing bucket, thus can solve motor overload phenomenon caused by frequently commutation, it is possible to avoid by electricity
The failure problems caused by electromagnetic valve during magnet valve control grab bucket opening and closing, can better ensure that the normal fortune of garbage grab bucket crane
OK.
Description of the drawings
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below will be to embodiment
Or accompanying drawing to be used is briefly described needed for description of the prior art, it should be apparent that, drawings in the following description are these
Some embodiments of utility model, for those of ordinary skill in the art, on the premise of not paying creative work, also
Other accompanying drawings can be obtained according to these accompanying drawings.
Structural representations of the Fig. 1 for the crane grab control device of this utility model one embodiment；
Conspectuses of the Fig. 2 for the crane grab control device of this utility model one embodiment.
Specific embodiment
It is to make purpose, technical scheme and the advantage of this utility model embodiment clearer, new below in conjunction with this practicality
Accompanying drawing in type embodiment, is explicitly described to the technical scheme in this utility model embodiment, it is clear that described reality
It is a part of embodiment of this utility model to apply example, rather than the embodiment of whole.Based on the embodiment in this utility model, ability
The every other embodiment obtained under the premise of creative work is not made by domain those of ordinary skill, belongs to this practicality new
The scope of type protection.
Structural representations of the Fig. 1 for the crane grab control device of this utility model one embodiment；As shown in figure 1,
The crane grab control device of the present embodiment, including chopper 10, converter 20 and grab bucket motor 30, wherein：
The input of converter 20 is connected with chopper 10, and the outfan of converter 20 is connected with grab bucket motor 30.
Used as the preferred of the present embodiment, the device can also include electric supply installation 40, and the electric supply installation 40 by open circuit
Device 10 is connected with converter 20, it is preferable that the voltage of the electric supply installation 40 is 380V.
Specifically, the 380V voltages that electric supply installation 40 is provided enter the input of converter 20 by chopper 10, pass through
The converter 20 is controlled, and is exported and is given grab bucket motor 30, to realize controlling the rotating of grab bucket motor 30.
It is understood that passing through Frequency Converter Control motor positive and inverse, it is possible to achieve adjust motor according to the type of equipment
The time of the speed, the speed of reversion and acceleration and deceleration of rotating forward, impact of the electric current to equipment can be effectively reduced.For example,
Using the present embodiment control device when, motor can be rotated forward (grab bucket closure) speed and be set as " 100% ", motor reversal
(grab bucket is opened) speed is set as " 60% ", and Acceleration and deceleration time is set as 3s, so that motor is in the handoff procedure of rotating, speed
The change curve of degree is smoothed as far as possible.
The crane grab control device of the present embodiment, is controlled motor of grabbing bucket, thus can be solved due to using converter
Motor overload phenomenon caused by certainly frequently commutating, it is possible to avoid grabbing bucket what is caused by electromagnetic valve when being opened and closed by solenoid valve control
Failure problems, can better ensure that the normal operation of garbage grab bucket crane.
Further, as the preferred of said apparatus embodiment, chopper 10 may include but be not limited to air-break.
Specifically, air-break (automatic switch) is a kind of chopper of excellent performance, and dielectric is air, can
Closed a floodgate with manually (or electronic), closing position is kept using lock, acted on by tripping mechanism and trip and there is interrupter cartridge
The low tension switch put, can be applied in the AC and DC device of below 500V, play connection, disjunction in circuit and carry volume
Determine the effect of the fault current such as operating current and short circuit, overload.
Further, in order to eliminate impact of the electric current to converter 20, the present embodiment installs a braking in converter 20 additional
Device, which is used for the acceleration and deceleration of the motor.
Used as the preferred of the present embodiment, the brake unit includes but is not limited to the braking resistor of a specific resistance, can be with
It is understood by, depending on the visual specific unit type of resistance of the braking resistor.
Specifically, in frequency conversion speed-adjusting system, the reduction of speed of motor and shutdown are realized by being gradually reduced frequency,
In the moment that frequency reduces, the synchronous rotational speed of motor declines therewith, and due to due to machinery inertial, the rotor speed of motor is not
Become.When synchronous rotational speed is less than rotor speed, the phase place of rotor current almost changes 180 degree, and motor is changed into from motoring condition
Generating state；At the same time, the torque on motor shaft becomes braking moment, the rotating speed of motor is declined rapidly, and motor is in
Regenerative braking state.The electric energy of motor regeneration feeds back to DC circuit Jing after fly-wheel diode all wave rectification.Due to DC circuit
Electric energy electrical network cannot be fed back to by rectifier bridge, only by the capacitive absorption of converter itself, although other parts can consume electricity
Can, but electric capacity still has the electric charge accumulation of short time, is formed " pumping voltage ", raises DC voltage.And too high DC voltage
Each several part device will be made to suffer damage.Therefore, for load must take required measure to process in dynamic brake state
This partial regeneration energy, the method for one of which process regeneration energy is dynamic braking.
The method adopted by the working method of dynamic braking is to place electric resistance unit component in converter DC side, will again
Raw power consumption realizes braking on power resistor.Obviously, this is a kind of most direct method for processing regeneration energy, can be by
Regeneration energy on resistance, is converted into heat energy, therefore is otherwise known as " resistive braking " by special energy-dissipating brake circuit consumption,
It includes brake unit and two part of braking resistor (referring to Fig. 2).
Wherein, the function of brake unit be when the voltage Ud of DC loop exceedes the limit value of regulation (such as 660V or
710V), energy consuming circuitry is connected, makes DC loop and released energy in heat energy mode after braking resistor.In brake unit can divide
Put two kinds of formula and external, the former applies to low power universal frequency converter, the latter then apply to big-power transducer or
It is that braking is had in the operating mode of particular/special requirement.It is, in principle, that the two and indistinction, " are opened as connection braking resistor
Close ", it includes power tube, voltage sample comparison circuit and drive circuit.
And braking resistor be for by the regeneration carrier that consumed in heat energy mode of energy of motor, it include resistance and
Two important parameters of power capacity.Generally in engineering from it is more be two kinds of ripple resistance and aluminium alloy resistance：The former
Be conducive to radiating to lower stray inductance amount using the vertical ripple in surface, and select high fire-retardance inorganic coating, effective protection resistance wire
It is not aging, increases the service life；The latter's resistor against weather, vibration resistance, better than traditional porcelain skeleton resistor, extensively should
Use for the severe industry control environment of high request, easy close installation, easy attached heat sinks are aesthetic in appearance.
Further, as the preferred of said apparatus embodiment, the device can also include control device 50, and the control
Device 50 is connected with converter 20.
Used as the preferred of the present embodiment, control device 50 includes but is not limited to PLC.
Specifically, PLC (Programmable Logic Controller, programmable logic controller (PLC)) is
A kind of digital electronic device with microprocessor, can be used for the digital logic controller of Automated condtrol, can refer to control
Order loads in internal memory at any time and stores and perform.Which is mainly by innernal CPU, instruction and data internal memory, input-output unit, power supply mould
The units such as group, digital simulation institute modularity is combined into, and can be widely applied to industrial control field.
Further, as the preferred of above-described embodiment, the PLC may also include abs；
Correspondingly, the control model of the PLC includes frequency converter failure pattern, converter operational mode and sky
Open protected mode.
It should be noted that all parts embodiment of the present utility model can be realized with hardware, or with one or
The software module run on the multiple processors of person is realized, or is realized with combinations thereof.Those skilled in the art should manage
Solution, can be realized according to this utility model embodiment using microprocessor or digital signal processor (DSP) in practice
The some or all functions of some or all parts in equipment.This utility model is also implemented as performing here
(for example, computer program and computer program are produced for some or all equipment of described method or program of device
Product).It is such to realize that program of the present utility model be stored on a computer-readable medium, or can have one or
The form of multiple signals.Such signal can be downloaded from internet website and be obtained, or provide on carrier signal, or
There is provided with any other form.
" one embodiment ", " embodiment " or " one or more embodiment " referred to herein is it is meant that combine
Special characteristic, structure or the characteristic that embodiment is described is included at least one embodiment of the present utility model.Additionally, please note
Meaning, the word example of " in one embodiment " is not necessarily all referring to same embodiment here.
In description mentioned herein, a large amount of details are illustrated.It is to be appreciated, however, that of the present utility model
Embodiment can be put into practice in the case where not having these details.In some instances, known side is not been shown in detail
Method, structure and technology, so as not to obscure the understanding of this description.
It should be noted that above-described embodiment is illustrated rather than to this utility model this utility model is limited,
And those skilled in the art can design alternative embodiment without departing from the scope of the appended claims.In right
In requirement, any reference markss between bracket should not be configured to limitations on claims.Word "comprising" is not arranged
Except there is element not listed in the claims or step.Word "a" or "an" before element does not exclude the presence of many
Individual such element.This utility model can be by means of the hardware for including some different elements and by means of properly programmed
Computer is realizing.If in the unit claim for listing equipment for drying, several in these devices can be by same
One hardware branch is embodying.The use of word first, second, and third does not indicate that any order.Can be by these lists
Word is construed to title.
Furthermore, it should also be noted that language used in this specification primarily to the purpose of readable and teaching and select
Select, rather than select to explain or limit theme of the present utility model.Therefore, without departing from claims
In the case of the scope and spirit of book, for those skilled in the art many modifications and changes be all it is aobvious and
It is clear to.For scope of the present utility model, the disclosure done to this utility model is illustrative and not restrictive, sheet
The scope of utility model is defined by the appended claims.
Although being described in conjunction with the accompanying embodiment of the present utility model, those skilled in the art can without departing from
Various modifications and variations are made in the case of spirit and scope of the present utility model, such modification and modification are each fallen within by appended
Within claim limited range.
Claims (10)
1. a kind of crane grab control device, it is characterised in that including chopper, converter and grab bucket motor；
The input of the converter is connected with the chopper；The outfan of the converter is connected with the grab bucket motor.
2. device according to claim 1, it is characterised in that the chopper includes air-break.
3. device according to claim 1, it is characterised in that the converter includes a brake unit.
4. device according to claim 3, it is characterised in that the brake unit includes a braking resistor.
5. device according to claim 1, it is characterised in that described device also includes control device；
The control device is connected with the converter.
6. device according to claim 5, it is characterised in that the control device includes PLC.
7. device according to claim 6, it is characterised in that the control model of the PLC include converter therefore
Barrier pattern and converter operational mode.
8. device according to claim 7, it is characterised in that the PLC includes abs；
Correspondingly, the control model of the PLC includes air switch protected mode.
9. device according to claim 1, it is characterised in that described device also includes electric supply installation；
The electric supply installation is connected with the converter by the chopper.
10. device according to claim 9, it is characterised in that the voltage of the electric supply installation is 380V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620776791.1U CN206051333U (en) | 2016-07-21 | 2016-07-21 | Crane grab control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620776791.1U CN206051333U (en) | 2016-07-21 | 2016-07-21 | Crane grab control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206051333U true CN206051333U (en) | 2017-03-29 |
Family
ID=58376641
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620776791.1U Active CN206051333U (en) | 2016-07-21 | 2016-07-21 | Crane grab control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206051333U (en) |
-
2016
- 2016-07-21 CN CN201620776791.1U patent/CN206051333U/en active Active
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Address after: 100007 Lama Temple street, Dongcheng District, Dongcheng District, Beijing Patentee after: Beijing lifting and conveying machinery design and Research Institute Co., Ltd. Address before: 100007 Lama Temple street, Dongcheng District, Dongcheng District, Beijing Patentee before: Beijing Materials Handling Research Institute |