CN201627223U

CN201627223U - Overload protection device for building hoist with uninterrupted power supply

Info

Publication number: CN201627223U
Application number: CN2009202595035U
Authority: CN
Inventors: 倪建军
Original assignee: CHANGSHA HAICHUAN AUTOMATION Co Ltd
Current assignee: CHANGSHA HAICHUAN AUTOMATION Co Ltd
Priority date: 2009-12-04
Filing date: 2009-12-04
Publication date: 2010-11-10
Anticipated expiration: 2019-12-04

Abstract

The utility model relates to an overload protection device for a building hoist with an uninterrupted power supply, which comprises a force transducer, a signal conditioning loop, an operation control loop and a display unit, wherein the signal outputs and the inputs of the force transducer, the signal conditioning loop, the operation control loop and the display unit are sequentially connected, and the uninterrupted power supply is mounted in an electrical control box and used for providing a working power supply for the overload protection device. The overload protection device can still work normally when a suspension cage of the building hoist is positioned on the ground, thereby facilitating the running, ensuring the safety and improving the efficiency.

Description

A kind of construction lifter excess load protective device of uninterrupted power source

Technical field:

The utility model relates to technical field of engineering machinery, is specifically related to a kind of overload protection device of construction elevator.

Background technology:

Construction elevator is the large-scale implement of building site, it mainly acts on is vertical transport construction worker and small-sized material in high building is built, continuous development along with builing industry, highrise building is more and more, the consumption of construction elevator is also increasing, but the security incident that is accompanied by also happens occasionally, and the whole nation is annual all to have a lot of particularly serious accidents that have personal injury to take place.From all analysis on accident cause results, the lifter excess load operation is an assignable cause.

Overload protection device for construction elevator, domestic had nearly 10 years research and development history, several years ago, the relevant pressure standard of country has emphasized that also all construction elevators that dispatch from the factory must dispose overload protection device, because the increase of use amount, manufacturer has developed into family more than 10 at present, the principle of product and form of structure are all similar, load cell has two kinds of mounting meanss: a kind of is that the pin type sensor is contained between driver plate and the cage, second kind is that load cell is installed between driver plate and the driver plate fixed frame, except the load cell with this dual mode detects the overall weight of cage, also through amplifying, signal processing circuit judges whether the load of cage overloads, if overload has taken place, provide acousto-optic hint, provide the control loop power supply that switching signal is cut off hoist simultaneously; After the load of cage reduced to certain value, the switching signal of device resetted, and hoist can normally move.After overload protection device is assembled on the construction elevator, improved the safety in operation of China's hoist, reduced the serious accident that causes by overload, shortened gap with the advanced product in the world.

Yet; all also there are some problems in present construction lifter excess load protective device in practice: one of them is: because the national Specification of hoist; when cage during on ground; after outer cage door is opened; must cut off device power supply (DPS); its objective is in order to guarantee that servant and loading are during thing; equipment does not have the possibility of operation fully; this is very necessary, but when equipment did not have the electricity supply, overload protection device also can't move; at this moment; if last people or loading, the operator can't know the real load of cage, has only when external door and after the cage door is closed and device start powers on; learn just whether hoist overloads; usually be to start the unloading of opening the door again that is over, this has brought more inconvenience to actual motion, influences production efficiency.

Summary of the invention:

Technical problem to be solved in the utility model is: solve the problem that above-mentioned prior art exists; and provide a kind of construction lifter excess load protective device of uninterrupted power source; overload protection device still can operate as normal when ground to make the construction elevator cage; convenient operation; guarantee safety, raise the efficiency.

The technical solution adopted in the utility model is: this uninterrupted power source construction lifter excess load protective device comprises load cell, signal condition loop, s operation control loop, display unit; Load cell is installed on the hanger between driver plate and the cage, perhaps is installed between driver plate and its fixed frame; But signal condition loop and s operation control loop can be installed in the electric control box of hoist also independent stationary on elevator craning cage; Display unit is fixed on from the nearer place of operator; Load cell, signal condition loop, s operation control loop, its signal output input of display unit connect successively; Uninterrupted power source is installed in the electric control box, provides working power to overload protection device.

In the technique scheme, signal condition loop and s operation control loop can independently be made two unit or be combined into an integral body.

In the technique scheme, uninterrupted power source can be independent of main control system and design separately, also can be incorporated in several parts such as signal condition loop, s operation control loop, uninterrupted power source loop in the cabinet.

In the technique scheme; uninterrupted power source is made of battery and control circuit; the city is electrically connected the input of control circuit; control circuit becomes dc source with the commercial power rectification; working power is provided and charges the battery to overload protection device, perhaps control circuit provides working power to overload protection device after with the battery supply conversion.

Operating principle:

The weight of cage is obtained and the cage actual weight signal of telecommunication one to one by load cell, amplification, filtering and the corresponding level translation function of signal realized in the signal condition loop, and the work of removing the peel the threshold values comparison that weighs, overloads, sending demonstration, parameter storage and driving switch amount is finished in the s operation control loop.Numerical value is after removing the peel heavily computing, compare with the overload threshold values, if do not surpass threshold values, show that this moment, cage did not overload, keep the control closing of contact, light corresponding state indication, and current data and last data are compared, when the data variation amount reaches preset value, just preserve this secondary data and current time, simultaneously these data and other work condition state are mail to display unit together, show this moment cage load value and work condition state; After if the data that this moment, sensor recorded surpass the overload threshold values, show that then cage overloads this moment, current time and overload condition will be stored, disconnect the control contact simultaneously, cut off the hoist control circuit, stop hoist to start operation, and provide the prompting of corresponding sound and light alarm, the alert video data of delivering newspaper is delivered to display unit, this moment, display unit just had show state and acousto-optic hint corresponding under the overload condition, reduce under the normal range (NR) up to cage load, hoist could normally start operation.

Outstanding feature of the present utility model and technique effect:

Adopt the design of uninterrupted power source, make overload device when end cage door opening, also can normally indicate the situation of loading, can limit manned easily and situation loading, use more conveniently, both guaranteed safety, improved operating efficiency again.

Description of drawings

Fig. 1 is the utility model example structure schematic diagram

Fig. 1 marking explanation:

1---load cell 2---signal condition loop

3---s operation control loop 4---host side wireless receiving and dispatching loop

5---display end wireless receiving and dispatching loop 6---display unit

7---the uninterrupted power source loop

Fig. 2 is the signal condition loop electrical schematic diagram of the utility model embodiment

Fig. 3 is the s operation control loop electrical schematic diagram of the utility model embodiment

Fig. 4 is the host side wireless receiving and dispatching loop electrical schematic diagram of the utility model embodiment

Fig. 5 is the display end wireless receiving and dispatching loop electrical schematic diagram of the utility model embodiment

Fig. 6 is the display unit electrical schematic diagram of the utility model embodiment

Fig. 7 is the uninterrupted power source loop electrical schematic diagram of the utility model embodiment

The specific embodiment:

Referring to Fig. 1, the utility model includes load cell 1, signal condition loop 2, s operation control loop 3, host side wireless receiving and dispatching loop 4, display end wireless receiving and dispatching loop 5, display unit 6 and uninterrupted power source loop 7 etc. and partly constitutes.Load cell 1 is installed on the hanger between construction elevator driver plate and the cage, perhaps be installed between driver plate and its fixed frame, load cell 1 is used to measure the real load of cage and obtains and the cage weight signal of telecommunication one to one, the signal that signal condition loop 2 is just sent here sensor is through amplifying, output to s operation control loop 3 behind filtering f and the level conversion v, overloading through center processing unit M, threshold values is judged and the judgement of data variation increment threshold values, when data surpass the overload threshold values, open control node K, make hoist stop operation, send corresponding alert data to give Tip element L, provide suitable acousto-optic hint, simultaneously alert data is sent to host side wireless receiving and dispatching loop 4, and open memory cell R, note this moment time and alarming value; When data do not surpass the overload threshold values, control node K keeps closure state, send corresponding data to give Tip element L prompting loaded-up condition, send main frame wireless receiving and dispatching loop 4 data simultaneously, simultaneously, center processing unit M also will carry out variable quantity to this secondary data and last data relatively, if variable quantity surpasses the threshold values of setting, just open memory cell R, note this data value and current time, if do not surpass, just do not note down.

Display unit 6 from the data of coming in display end wireless receiving and dispatching loop 5 after the conversion of necessity, offer display unit P and acousto-optic parts S.

Uninterrupted power source loop 7 is made of battery B and control circuit C, and when civil power, control circuit C directly offers device to the required dc source of civil power alternative cost device and uses, and judges also that simultaneously whether battery B needs charging, as needs, must charge to it; When no civil power, control circuit C will be powered to device after certain conversion by battery B.

A specific embodiment of the present utility model arrives Fig. 7 referring to Fig. 2:

Fig. 2 is the specific embodiment in signal condition loop, the millivolt signal that sensor signal is come is after IC1 amplifies, by IC2 filtering, adjust level by IC3 again and send IC4 to carry out the A/D conversion, by IC4 output and sensor signal data signal one to one to suitable level state.

Fig. 3 is the specific embodiment in s operation control loop, nurse one's health the data signal that the loop is sent here by single-chip microcomputer IC5 received signal, constitute center processing unit by IC5, IC6, IC7, IC7, IC8, finish tare weight, overload threshold values comparison, send demonstrations, parameter to store and the work of driving switch amount.

Numerical value is after removing the peel heavily computing, compare with the overload threshold values, if do not surpass threshold values, show that this moment, cage did not overload, keep control contact K closure, light the corresponding state indicator lamp in the L loop, and current data and last data are compared, when the data variation amount reaches preset value, just preserve this secondary data and current time by IC9, simultaneously these data and other work condition state are mail to host side wireless receiving and dispatching loop 4 by IC8 together;

After if the data that this moment, sensor recorded surpass the overload threshold values, show that then cage overloads this moment, to store current time and overload condition by IC9, disconnect control contact K simultaneously, cut off the hoist control circuit, stop hoist to start operation, and provide corresponding sound and light alarm prompting, and deliver to host side wireless receiving and dispatching loop 4 through the IC8 alert video data of delivering newspaper by the L loop.

Fig. 4 is the embodiment in host side wireless receiving and dispatching loop, Fig. 5 is the embodiment in display end wireless receiving and dispatching loop, its wireless communication mode is an infrared-ray communication, two circuit diagrams are just the same, produce the modulating frequency of the infrared emission of 38K by IC10, when input signal is high level, the infrared pulse signal of 38K will externally be launched, when signal is low level, no infrared signal output, IC11 is infrared receiving unit, when receiving the infrared signal of accepting 38K, being output as high level, is low level during no signal.This embodiment is the bidirectional transmit-receive function, and display end wireless receiving and dispatching loop 5 is except the data that can accept host side wireless receiving and dispatching loop 4 and send, and host side wireless receiving and dispatching loop 4 also can receive the data that send in display end wireless receiving and dispatching loop 5.

Fig. 6 is the specific embodiment of display unit, and the data that IC13 acceptance is sent here by display end wireless receiving and dispatching loop 5 among the figure after conversion process, send display device to show the current loaded-up condition of hoist through IC12.

Fig. 7 is the specific embodiment in uninterrupted power source loop, when having civil power to insert, is powered to device by civil power, and is when no civil power, battery-powered.Wherein the charging process of IC14 management battery arrives certain value when cell voltage is low, and the IC14 output low level is charged the battery by civil power, and IC14 exports high level to certain value when cell voltage is high, and charging finishes; IC15 is the powered battery control circuit, when no civil power, and the IC15 output low level, the relay J action is installed battery-powered; When cell voltage hanged down to certain value, IC15 exported high level, and relay J disconnects, and stopped the device power supply, and its purpose is protected battery; Behind civil power, IC15 exports high level, and relay J disconnects, and directly to device powered by civil power this moment.

Claims

1. the construction lifter excess load protective device of a uninterrupted power source comprises load cell, signal condition loop, s operation control loop, display unit; Load cell, signal condition loop, s operation control loop, its signal output input of display unit connect successively, it is characterized in that also including uninterrupted power source, and uninterrupted power source is installed in the electric control box, provides working power to overload protection device.

2. the construction lifter excess load protective device of uninterrupted power source according to claim 1 is characterized in that signal condition loop and s operation control loop independently make two unit or be combined into an integral body.

3. the construction lifter excess load protective device of uninterrupted power source according to claim 1; it is characterized in that uninterrupted power source is independent of main control system and designs separately, perhaps signal condition loop, s operation control loop, several parts in uninterrupted power source loop are incorporated in the cabinet.

4. the construction lifter excess load protective device of uninterrupted power source according to claim 1; it is characterized in that uninterrupted power source is made of battery and control circuit; the city is electrically connected the input of control circuit; control circuit becomes dc source with the commercial power rectification; provide working power and battery charge to overload protection device, perhaps control circuit provides working power to overload protection device after with the battery supply conversion.