CN205263215U - Electric block efficiency test system - Google Patents

Abstract

The utility model discloses an electric block efficiency test system belongs to hoisting equipment efficiency test technical field. The system includes: UPS power, PLC, industry control computer, control transfer box, voltage regulator, current transformer, electric energy meter and laser range finder. The utility model provides an electric block efficiency test system has advantages such as convenient operation, measurement accuracy height, can satisfy the demand that electric block efficiencies different kinds of, different power were tested, and the commonality is strong, and degree of automation is high, has improved measurement accuracy, and ability furthest reduces user's intensity of labour.

Description

A kind of electric block efficiency test system

Technical field

The utility model relates to crane gear efficiency test technical field, particularly a kind of electric block efficiencyTest macro.

Background technology

Electric block is a kind of small-sized crane gear, have volume little, from heavy and light, simple to operate and useThe features such as convenience, are widely used in the place such as industrial and mining enterprises, storage harbour. Along with national to joint in recent yearsThe attention that can reduce discharging, the energy consumption of electric block also more and more receives publicity. At present both at home and abroad also not for electricityThe standard of moving cucurbit efficiency test and special test macro. The Major Difficulties of electric block efficiency test is:1) definition of efficiency value; The actual condition of electric block comprises and hoists, stops and declining, wherein relatedPower conversion comprises electric energy and mechanical energy, mechanical energy and kinetic energy and kinetic energy and potential energy, and energy loss comprisesThe energy loss of motor power loss, decelerator and the brake course of work; Because energy loss also comprises electricityLosses in the loss of gas part and mechanical transfer process etc., therefore the definition of efficiency value and calculating are all difficult problems. 2)Because electric block can produce certain braking glide quantity in decline braking procedure, therefore at electric block literFalling load in process can be more and more lower, and finally drops to ground, thereby affects the accurate of efficiency test resultProperty.

Utility model content

Lack standard in order to solve existing electric block efficiency test, efficiency value cannot be determined and test result standardThe problems such as really property is poor, the utility model provides a kind of electric block efficiency test system, comprise ups power,PLC, industrial computer, control transfer box, pressure regulator, current transformer, electric energy meter and laser range finder;Described ups power is connected with PLC, industrial computer and electrical energy meter electricity respectively; Described PLC respectively with industry controlComputer and the electrical connection of control transfer box; Described laser range finder is electrically connected with industrial computer; Described electric energyTable is electrically connected with industrial computer, pressure regulator summation current transformer respectively; Described current transformer respectively with tuneDepressor and electric block electrical connection; Described control transfer box is electrically connected with electric block.

Described system also comprises outside three phase mains, described outside three phase mains respectively with described ups power andPressure regulator electrical connection.

The electric block efficiency test system that the utility model provides, adopts PLC to be combined with industrial computerScheme, has easy to operate, certainty of measurement advantages of higher, can meet electricity dissimilar, different capacityThe demand of moving cucurbit efficiency test, highly versatile, automaticity is high, has improved certainty of measurement, can be maximumLimit ground reduces user's labour intensity.

Brief description of the drawings

Fig. 1 is that the electric block efficiency test system that uses the utility model embodiment to provide is carried out efficiency testProcess schematic diagram;

Fig. 2 is the structure principle chart of the electric block efficiency test system that provides of the utility model embodiment.

Detailed description of the invention

Below in conjunction with drawings and Examples, technical solutions of the utility model are further described.

Electric block is for the crane gear to certain position by certain load lifting. At load uphill processIn, the energy consumption of electric block is mainly electric energy, accesses the electric energy of the three-phase alternating current of electric block,The drag friction that motor operation can consume part energy, decelerator and brake also can produce power loss,Load is finally thus lifted to assigned address. Therefore, be actually used in and realize the energy that load lifting consumes and be onlyThe emphasis that electric block efficiency problem is paid close attention to. In the utility model embodiment, provide as given a definition: will specifyLoad lifting overcomes gravity institute work during to assigned position and is called as available energy, by the electricity consuming in this processCan be called supply energy. The efficiency value of the utility model embodiment electric block is defined as: in the default work periodInterior (conventionally getting 10 work periods) available energy and the ratio of supplying with energy.

Referring to Fig. 2, the utility model embodiment provides a kind of electric block efficiency test system, comprising:Ups power 201, PLC (programmable controller) 202, industrial computer 203, control transfer box 204,Pressure regulator 205, current transformer 206, electric energy meter 207 and laser range finder 208. Wherein: ups powerBe connected with PLC, industrial computer and electrical energy meter electricity respectively, for stable power supply is provided; PLC by withToo net is connected with industrial computer, for realizing and the communication of industrial computer; PLC is by controlling transfer boxBe electrically connected with electric block, for controlling the lifting of electric block; Power line and the control line of electric block divideBe not electrically connected with control transfer box; Laser range finder is by the RS422 of RS422 data wire and industrial computerCommunication interface connects, and is transferred to industrial computer for the shift value that the ordinance load recording is hoisted; Electric energyTable is connected with the RS485 communication interface of industrial computer by RS485 data wire, and electric energy meter respectively withPressure regulator summation current transformer electrical connection, for according to the magnitude of voltage of pressure regulator output and the electricity of current transformerFlow valuve, calculates energy value, and this energy value is transferred to industrial computer; Current transformer respectively with tuneDepressor and electric block electrical connection, for measuring the operating current of electric block; Pressure regulator is used for regulating electronicThe input voltage of cucurbit, to adapt to the electric block of different size and relevant operating condition of test; Industrial computerFor according to the energy value obtaining and the lifting altitude value of ordinance load, calculate the efficiency value of electric block,And deposit efficiency value in database, carry out data storing generating report forms by database, to inquire aboutWith printing. In actual applications, in order to ensure the continous-stable work of ups power and pressure regulator, need byOutside three phase mains 209 accesses ups power and pressure regulator.

The electric block efficiency test system of the present embodiment is carried out under rated voltage and rated load, adjustsDepressor is for regulating the input voltage of electric block, and the outputting power line of pressure regulator accesses respectively the electricity of electric energy meterThe input of pressure side summation current transformer, the output access electric energy meter of current transformer. Electric energy meter is for rootAccording to input voltage and the electric current of electric block, calculate energy value. Industrial computer can by voltage, electric current,Frequency and energy value show in real time. Electric energy meter has 2 road passive number amount input points, respectively as withPLC controls the handshake of electric block rising and down maneuver. Laser range finder can be arranged on electric blockLoad directly over, and be connected with industrial computer by communication interface, the height value that load is hoisted is real-timeBe presented on industrial computer. When test, the control line of tested electric block and power line Access Control are turnedConnect in case. On industrial computer, select duty and measure number of times (or the self-defined cycle of operation and number of times),First by load lifting to certain altitude, after load stops, then on industrial computer State selective measurements, systemBy carrying out automatic-ascending, stop according to duty and number of times (or the self-defined cycle of operation and number of times) that selecting,The circulation decline, stopping. After initiation command sends, system first reads the height value of current load, then opensBegin to rise and move; Load rises after the scheduled time and stops by the duty of electric block, and system reads again to be worked asThe height value of front load, and reading power meters is transferred to the energy value of industrial computer, system calculates respectivelyTo available energy and supply energy, and automatically calculate efficiency value. Each circulation efficiency value is all automatically calculated and showsAnd storage. In cyclic process, the initial displacement that the ordinance load recording when laser range finder hoists is greater than in advanceIf while measuring low level, show that the height of load is too low; Before next one circulation starts, system can be passed through journeyOrder control will be carried out hoisting of next circulation again after load automatic lifting. The supply energy producing in lifting processCan remove by bales catch with available energy system, whole measuring process is without human intervention. After all having circulated,System can be calculated the mean value of efficiency automatically. Test data is stored in the database of computer, can facilitateCall and print, be conducive to follow the tracks of the efficiency situation of electric block, facilitate enterprise according to efficiency value comeImprove the performance of electric block, improve the market competitiveness.

Fig. 1 shows and uses above-mentioned electric block efficiency test system to carry out the process of electric block efficiency test,Comprise the steps:

Step 101: by displacement measuring equipment be arranged on ordinance load directly over, and by electric energy measurement equipment withThe three-phase alternating current electrical input of electric block power inleting terminal connects.

In actual applications, displacement measuring equipment adopts laser range finder, and electric energy measurement equipment can adopt electric energyTable. Based on the consideration of process of the test safety, laser range finder be conventionally arranged on ordinance load directly over; ThisUnder the safe prerequisite of external guarantee, laser range finder also can be arranged on ordinance load under; This enforcementExample laser range finder be arranged on ordinance load directly over.

Step 102: the initial displacement S1 that the ordinance load recording according to laser range finder hoists and stop displacementS2, calculates the lifting altitude H of ordinance load.

The lifting altitude H=S1-S2 of ordinance load.

Step 103: the quality of load and lifting altitude according to the rules, calculates electric block in default work weekAvailable energy Q in phase_y。

Q_yCalculating: the formula that overcomes load Action of Gravity Field acting is W=mgH, the matter that wherein m is loadAmount, unit is kg; G is acceleration of gravity, gets 9.8N/kg; H is that the height that load is raised (rises and raisesDegree), unit is m. Under normal circumstances, quality of loads unit used for electric hoist is all in ton, with symbol G tableShow, 1G=1000kg, the computing formula of available energy is like this:

$Q_y=\underset{1}{\overset{k}{\Σ}}\left(9800{\mathrm{GH}}_i\right);$

Wherein, G is the quality of loads that electric block promotes, and unit is ton (t); H_iIt is i work periodLoad lifting altitude, unit be rice (m); K is work period number of times (k≤10); Q_yUnit be burntEar (J).

Step 104: the measured value hoisting in process in ordinance load according to electric energy meter, calculates electric block and existSupply energy Q in the default work period_G。

Q_GCalculating: $Q_G=\underset{1}{\overset{k}{\Σ}}3.6\×{10}^6{D}_i;$

Wherein, D_iBe electric energy meter measured value in i work period, unit is kilowatt hour (kWh), 1,000Watt-hour=3.6 × 10⁶Joule; K is work period number of times (k≤10); Q_GUnit be joule (J).

Step 105: the available energy according to electric block within the default work period and supply energy, calculate electronicThe efficiency value η of cucurbit.

The calculating of η: η=Q_y/Q_G×100％。

In concrete production practices, the data that laser range finder and electric energy meter record respectively by RS422 andRS485 data wire transfers to industrial computer, calculates electric block in default work week by industrial computerAvailable energy, supply energy and efficiency value in phase. The quality of loads that electric block promotes can be by hang hook steelyard at meterOn calculation machine, read or direct keyboard input. In cyclic test process, for rising of preventing that ordinance load from hoistingBeginning displacement is too low, affects the accuracy of efficiency test result, need to before ordinance load hoists, use Laser MeasuringWhether the initial displacement hoisting apart from instrument measurement ordinance load is greater than the default low level of measuring; If initial displacement is greater thanThe default low level of measuring, needs first to promote ordinance load, makes initial displacement be less than the default low level of measuring, thenProcess of the test again hoists; If initial displacement is less than or equal to the default low level of measuring, directly hoistProcess of the test.

The electric block efficiency test system of the utility model embodiment, adopts PLC to be combined with industrial computerScheme, there is easy to operate, certainty of measurement advantages of higher, can meet dissimilar, different capacityThe demand of electric block efficiency test, highly versatile, automaticity are high, have improved certainty of measurement, can beLarge limit ground reduces user's labour intensity. The electric block efficiency test system of the utility model embodiment,Can select the working level of electric block M1～M8, automatically test and measure by selected duty.In process of the test, due to the impact of braking glide quantity, load height can be more and more lower, and the present embodiment adoptsLaser range finder, not only can participate in measuring the height change of load, but also measurement low level can be set,After load drops to low level, automatically promote, and continue to measure, met the requirement of automatic measurement.

Above-described specific embodiment, carries out the purpose of this utility model, technical scheme and beneficial effectFurther description, institute it should be understood that the foregoing is only specific embodiment of the utility model and, be not limited to the utility model, all within spirit of the present utility model and principle, that does appointsWhat revises, is equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.

Claims (2)

1. an electric block efficiency test system, is characterized in that, comprises ups power, PLC, industry controlComputer, control transfer box, pressure regulator, current transformer, electric energy meter and laser range finder; Described UPSPower supply is connected with PLC, industrial computer and electrical energy meter electricity respectively; Described PLC respectively with industrial computer andThe electrical connection of control transfer box; Described laser range finder is electrically connected with industrial computer; Described electric energy meter respectively withIndustrial computer, the electrical connection of pressure regulator summation current transformer; Described current transformer respectively with pressure regulator and electricityMoving cucurbit electrical connection; Described control transfer box is electrically connected with electric block.

2. electric block efficiency test system as claimed in claim 1, is characterized in that, described system alsoComprise outside three phase mains, described outside three phase mains is electrically connected with described ups power and pressure regulator respectively.