CN206955473U - A kind of elevated trestle with balance adjustment function - Google Patents
A kind of elevated trestle with balance adjustment function Download PDFInfo
- Publication number
- CN206955473U CN206955473U CN201720388085.4U CN201720388085U CN206955473U CN 206955473 U CN206955473 U CN 206955473U CN 201720388085 U CN201720388085 U CN 201720388085U CN 206955473 U CN206955473 U CN 206955473U
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- Prior art keywords
- trestle
- lifting
- control
- jack
- comparator
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Abstract
The utility model provides a kind of elevated trestle with balance adjustment function, including trestle, positioned at four hoisting frames of four corner points of trestle, and for lifting the lifting device of trestle, the lifting device includes four jack machinisms being arranged on hoisting frame, and for controlling the Lifting Control System of the jack machinism, the Lifting Control System includes two A.C. contactors and eight conversion A.C. contactors, two A.C. contactors are used to control four jack machinisms to rise or simultaneously decline simultaneously, eight conversion A.C. contactors are used to control rising or falling for single jack machinism.The utility model engages single-point and Multipoint synchronous enhanced feature, realizes timely balance adjustment control, and control principle is simple, easy to operate directly perceived, the practical application being easy in live lifting process, and trestle lifting can be adjusted in time.
Description
Technical field
It the utility model is related to heavy multi-point lifting technical field, and in particular to a kind of carrying with balance adjustment function
Lift-type trestle.
Background technology
, it is necessary to realize the lifting of trestle with running block using hoist engine when trestle is lifted.At present, general hoisting and hanging is equal
Lifted for single-point power, or multiple spot starts simultaneously.Lifted for similar trestle, volume is big, and weight is big, can not using single-point lifting
Complete, be difficult to grasp according to multi-point lifting its control process, deviation is larger, balance it is difficult to ensure that.
Utility model content
In order to solve the above technical problems, a kind of strong applicability of the utility model offer, elevated trestle simple to operate,
Balance adjustment ability is stronger, and concrete technical scheme is as follows：
A kind of elevated trestle with balance adjustment function, including trestle, four positioned at four corner points of trestle
Hoisting frame, and for lifting the lifting device of trestle, the lifting device includes four be arranged on hoisting frame
Heavy-duty machine structure, and for controlling the Lifting Control System of the jack machinism, the Lifting Control System includes two A.C. contactors
With eight conversion A.C. contactors, two A.C. contactors are used to control four jack machinisms to rise or simultaneously decline, eight simultaneously
Individual conversion A.C. contactor is used to control rising or falling for single jack machinism.
Warning module of weighing is provided with the jack machinism, the warning module of weighing includes being used to measure jack machinism load
The weighing sensor of lotus, and the early warning circuit of processing weighing sensor output signal.
The early warning circuit include be sequentially connected in series the two poles of the earth integrated operatinoal amplifier, comparator, gate circuit, control circuit, and
The audible-visual annunciator and control relay being connected with two output ends of control circuit, the comparator is four comparators, wherein three
Individual comparator independent of each other respectively compared with different reference voltages, according to different ground jack load divided by control circuit
Class controls.
Three comparators independent of each other are respectively first comparator, the second comparator and the 3rd comparator, reference voltage
Respectively 90%, 105% and the 130% of rated value, wherein the output end of the second comparator is connected with delay circuit.
The lower end of the hoisting frame is provided with stay wire displacement sensor, and stack is measured in real time by stay wire displacement sensor
The hoisting depth of each angle point of bridge.
From above technical scheme, the utility model engages single-point and Multipoint synchronous enhanced feature, realizes timely
Balance adjustment controls, and control principle is simple, and easy to operate directly perceived, the practical application being easy in live lifting process can be right in time
Trestle lifting adjusts.
Brief description of the drawings
Fig. 1 is front view of the present utility model；
Fig. 2 is side view of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail, it is new describing this practicality in detail
Before the technical scheme of each embodiment of type, involved noun and term are explained, in this manual, title is identical
Or label identical part represents similar or identical structure, and it is only limitted to the purpose of signal.
As illustrated in fig. 1 and 2, the elevated trestle includes trestle 1, four lever gear doors positioned at four corner points of trestle
Frame 2, and for lifting the lifting device of trestle.The lifting device includes four cranes being arranged on hoisting frame
Structure, and for controlling the Lifting Control System of the jack machinism.
The jack machinism includes hoist engine 31, running block 32 and warning module of weighing, and wherein hoist engine is set respectively
On the top of hoisting frame, trestle is pulled to be lifted by steel wire rope.The warning module of weighing includes being used to measure lifting
The weighing sensor of mechanism load, and the early warning circuit of processing weighing sensor output signal, wherein weighing sensor are located at
Between the fixed pulley axis and axle bed of crane, for monitoring the load of crane in real time.After jack machinism lifts by crane object, weigh
Sensor, which is pressurized, produces the voltage signal proportional to load, completes weight and is changed to voltage signal.
The early warning circuit include be sequentially connected in series the two poles of the earth integrated operatinoal amplifier, comparator, gate circuit, control circuit, and
The audible-visual annunciator and control relay being connected with two output ends of control circuit, the comparator is four comparators, wherein three
Individual comparator independent of each other respectively compared with different reference voltages, according to different ground jack load divided by control circuit
Class controls.
Three comparators independent of each other are respectively first comparator, the second comparator and the 3rd comparator, reference voltage
Respectively 90%, 105% and the 130% of rated value, wherein the output end of the second comparator is connected with delay circuit.
When ground jack load reaches 90%, first comparator action, audible-visual annunciator sends pulsed sound, yellow indicator lamp
Bright, control relay is failure to actuate；When ground jack load reaches 105%, the second comparator action, for avoid start when impact carry
The false overload of moment caused by lotus, there is provided a delay circuit, and after being delayed 1 ~ 2 second, if overload still suffers from, judgement is true
Positive overload, cuts off lifting motor power supply by control relay immediately, and red beacon lamp is bright.If load is more than 130%, the
Three comparators act, and directly open gate circuit, cut off jack machinism lift control ring current immediately, are simultaneously emitted by acousto-optic report
It is alert.
The control relay for performing control uses small-sized high-power DC relay, and when normal lifting, relay is motionless
Make, present apparatus control relay contact series are in jack machinism hoisting circuit.When overload, control relay action, raising
Loop is cut off, and jack machinism stops raising operation.A total of two groups of dc sources of circuit：± 6V supplies sensor and secondary meter ,+
5V supplies weight figure display.
The lower end of the hoisting frame 2 is provided with stay wire displacement sensor 4, is measured in real time by stay wire displacement sensor
The hoisting depth of each angle point of trestle, and be shown on displacement digital display, operating personnel can be according to the position of the angle point of trestle four
Lifting is moved to deviate to adjust corresponding jack machinism, to reach the purpose of balance adjustment.Stay-supported type displacement sensor carries trestle
Elevator turn changes quantifiable electric signal into, is wound on by stretchable stainless steel cable on a threaded wheel hub, this wheel hub
Linked together with a precision rotation inductor.Stay-supported type displacement sensor is arranged in trestle base cross members, and bracing wire end is consolidated
Being scheduled on to be lifted on trestle.Trestle is lifted or declined, and bracing wire stretching, extension and contraction, drives the rotation of precision rotation inductor, output one
The individual electric signal proportional to bracing wire displacement, measurement output signal can draw displacement or the speed of trestle.
The Lifting Control System includes two A.C. contactors and eight conversion A.C. contactors, two A.C. contactors
For controlling four jack machinisms to rise or decline simultaneously simultaneously, eight conversion A.C. contactors are used to control single jack machinism
Rise or fall.
The Lifting Control System can realize single-point lifting and multi-point lifting combination control, pacify at the top of trestle hoisting frame
Hoist engine is filled, is that the lifting of trestle provides power by wire rope pulley group, four hoist engines move, stop combination by lifting control
System control, the peripheral operation interface combinations switch control of Lifting Control System include " with rising " of multiple hoist points, " list
Rise ", " stoppings " function, rising or falling for each hoist engine correspond to when stacked switch be in single shelves has independent switch to control
System, when in rising, corresponding two switches of raising and lowering.
The utility model to trestle by jack machinism super-limit prewarning, lifting real-time displacement monitoring, single-point lifting and more
The control that point lifting is combined, reach the technology of trestle lifting balance adjustment, avoid occurring not in Multipoint synchronous lifting process
Balanced hoisting, excessive deformation will not be caused to trestle overall structure in lifting process.
Embodiment described above is only that preferred embodiment of the present utility model is described, not to this practicality
New scope is defined, and on the premise of the utility model design spirit is not departed from, those of ordinary skill in the art are to this
The various modifications and improvement that the technical scheme of utility model is made, the guarantor that claims of the present utility model determine all should be fallen into
In the range of shield.
Claims (5)
1. a kind of elevated trestle with balance adjustment function, including trestle, carry positioned at four of four corner points of trestle
Door frame is risen, and for lifting the lifting device of trestle, it is characterised in that the lifting device includes being arranged on hoisting frame
Four jack machinisms, and for controlling the Lifting Control System of the jack machinism, the Lifting Control System includes two friendships
Contactor and eight conversion A.C. contactors are flowed, two A.C. contactors are for the rising simultaneously of four jack machinisms of control or simultaneously
Decline, eight conversion A.C. contactors are used to control rising or falling for single jack machinism.
2. elevated trestle according to claim 1, it is characterised in that be provided with early warning of weighing in the jack machinism
Module, the warning module of weighing are defeated including the weighing sensor for measuring jack machinism load, and processing weighing sensor
Go out the early warning circuit of signal.
3. elevated trestle according to claim 2, it is characterised in that the early warning circuit includes two be sequentially connected in series
Pole integrated operatinoal amplifier, comparator, gate circuit, control circuit, and the audible-visual annunciator being connected with two output ends of control circuit
And control relay, the comparator are four voltage comparators, wherein three comparators independent of each other respectively from different bases
Quasi- voltage ratio is compared with control circuit carries out classification control according to different ground jack load.
4. elevated trestle according to claim 3, it is characterised in that three comparators independent of each other are respectively
One comparator, the second comparator and the 3rd comparator, reference voltage are respectively 90%, 105% and the 130% of rated value, wherein
The output end of second comparator is connected with delay circuit.
5. elevated trestle according to claim 1, it is characterised in that the lower end of the hoisting frame is provided with bracing wire
Displacement transducer, measure the hoisting depth of each angle point of trestle in real time by stay wire displacement sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720388085.4U CN206955473U (en) | 2017-04-13 | 2017-04-13 | A kind of elevated trestle with balance adjustment function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720388085.4U CN206955473U (en) | 2017-04-13 | 2017-04-13 | A kind of elevated trestle with balance adjustment function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206955473U true CN206955473U (en) | 2018-02-02 |
Family
ID=61373596
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720388085.4U Expired - Fee Related CN206955473U (en) | 2017-04-13 | 2017-04-13 | A kind of elevated trestle with balance adjustment function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206955473U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111172880A (en) * | 2020-01-03 | 2020-05-19 | 同济大学 | Automatic balance type liftable trestle based on negative feedback |
| CN111676799A (en) * | 2020-06-19 | 2020-09-18 | 杭州江润科技有限公司 | Height-adjustable simple cable-stayed diversion trench temporary bridge and construction method thereof |
-
2017
- 2017-04-13 CN CN201720388085.4U patent/CN206955473U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111172880A (en) * | 2020-01-03 | 2020-05-19 | 同济大学 | Automatic balance type liftable trestle based on negative feedback |
| CN111676799A (en) * | 2020-06-19 | 2020-09-18 | 杭州江润科技有限公司 | Height-adjustable simple cable-stayed diversion trench temporary bridge and construction method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180202 Termination date: 20190413 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |