CN203855317U - Energy efficiency measurement system of quayside container crane - Google Patents

Abstract

The utility model relates to an energy efficiency measurement system of a quayside container crane, which adopts weighted average on the basis of the loaded condition level, belonging to the field of the energy efficiency measurement of the quayside container crane of the special equipment quayside container crane. The system comprises a quayside container crane device, a power supply circuit and an electric energy measurement device, wherein the quayside container crane device comprises a support system, a trolley travelling mechanism, a hoisting mechanism, a lifting appliance, a weight and a computer management system, wherein the power supply circuit is a three-phase three-wire system power supply circuit, and the electric energy measurement device is connected with the power supply circuit. The energy efficiency measurement system can achieve energy efficiency measurement by adopting the weighted average method on the basis of the loaded condition level; a plurality of typical loaded values are selected to perform cyclic test in one testing period, the weighting coefficient is determined according to the ratio of the hoisting times to the total times, then the testing result in one test cycle is equivalently converted to one operating cycle, and then equivalent effective energy, equivalent supplying energy and energy efficiency can be calculated.

Description

Shore container crane efficiency measuring system

Technical field

The utility model relates to special equipment shore container crane efficiency fields of measurement.

Background technology

Shore container crane, as a class of special equipment, is the fundamental equipments of the development of the national economy, and its safety performance and operation conditions are directly connected to the people's the security of the lives and property and economic conditions.Along with improving constantly that people are familiar with resources and environment, large quantities of laws and regulations such as " Energy Conservation Law of the People's Republic of China ", the Law on Environmental Protection of the People's Republic of China are put into effect in succession." Energy Conservation Law of the People's Republic of China " clearly proposed the requirement of " to the special equipment of highly energy-consuming, carrying out energy-conservation examination and supervision according to the regulation of State Council ".Under this situation, energy-saving and emission-reduction will become the development tendency of shore container crane, and Ye Shi enterprise reduces the important technical of operating cost.There is very large energy-saving potential as large electricity consumer's shore container crane.Carry out energy-saving and emission-reduction work, first should research and develop the efficiency measuring system of shore container crane.

Summary of the invention

The utility model object is open a kind of shore container crane efficiency measuring system, can be applicable to realize adopt average weighted efficiency method of measurement based on load condition rank.

The technical scheme that the utility model provides is:

A kind of shore container crane efficiency measuring system, is characterized in that, comprising: shore container crane device, feed circuit and device for measurement of electrical energy, wherein:

Described shore container crane device comprises again strutting system, running gear for trolley, lifting mechanism, suspender and weight and computer management system,

Described strutting system comprises column and crossbeam, and crossbeam is vertically fixed on column, and crossbeam is provided with track;

Described running gear for trolley comprises dolly, vehicle motor and parallel motion range encoder, dolly is by the track interlock on its train and crossbeam, the wheel that described parallel motion range encoder is installed on dolly is fastened, and parallel motion range encoder is connected with computer management system;

Described lifting mechanism comprises steel rope, lifting motor and lifting altitude coder, and one end of described steel rope hangs on suspender and weight on dolly by fixed pulley, and the other end of steel rope is connected with lifting motor mouth; Described lifting altitude coder is installed on fixed pulley, and lifting altitude coder is connected with computer management system;

Described computer management system comprises interconnective treater and Liquid Crystal Display, treater has simple process function, treater is connected with parallel motion range encoder, lifting altitude coder respectively, treater receives the data that come from parallel motion range encoder, the collection of lifting altitude coder, and shows level and corresponding speed, the distance parameter of vertical displacement by Liquid Crystal Display;

Described feed circuit, for three-phase three-wire system feed circuit, structure comprises high-tension switch cabinet, main transformer, lift control cabinet and dolly control housing, described lift control cabinet and dolly control housing parallel join, and described lift control cabinet, dolly control housing connect respectively lifting motor, vehicle motor; Between main transformer and lift control cabinet, dolly control housing, be to be connected by three-phase three-wire system feed circuit, harbour external power is connected to main transformer input end by high-tension switch cabinet;

Described device for measurement of electrical energy, this device for measurement of electrical energy is connected to feed circuit; Described device for measurement of electrical energy is made up of main frame, voltage sensor, current sensor, telltale and some wires, and voltage sensor, current sensor are connected with main frame input end respectively, and host output end is connected with telltale.

The beneficial effects of the utility model:

The utility model system can science, react efficiency situation effectively, accurately, and the measurement of the shore container crane efficiency of carrying out can be reacted the efficiency situation of shore container crane accurately, really.Result of a measurement can be the reducing energy consumption of manufacturer to existing product and the exploitation of new product provides guidance, also can be user and chooses shore container crane efficiency reference is provided.Rely on the utility model system, can realize based on load condition rank and adopt method of weighted mean to measure efficiency.Method of measurement: within a test period, choose multiple typical load values and carry out cyclic test, ratio according to the shared total degree of the corresponding lifting times of typical load is determined coefficient of weight, then by test result equivalent conversion to the duty cycle in the test period, calculate equivalent available energy, equivalence supply with can and efficiency.

Brief description of the drawings

Fig. 1 is the on-the-spot schematic diagram of measuring incipient state.

Fig. 2 is the on-the-spot schematic diagram of horizontal displacement state of kinematic motion measuring period.

Fig. 3 is the on-the-spot schematic diagram of vertical displacement movement state measuring period.

Fig. 4 is the mode of connection schematic diagram of device for measurement of electrical energy and feed circuit.

Fig. 5 the utility model overall architecture principle schematic.

Fig. 6 is testing process schematic diagram of the present utility model.

Description of symbols: description of symbols: cart walking mechanism 1, column 2, crossbeam 3, dolly 4, steel rope 5, suspender 6, weight 7.

Detailed description of the invention

As shown in Figures 1 to 5, following examples are further introduced the working process of technical solutions of the utility model and whole system by reference to the accompanying drawings.

Whole shore container crane efficiency measuring system, according to Functional Design, comprising: as the shore container crane device of measuring table, for access harbour power supply feed circuit, be used for measuring and consume the device for measurement of electrical energy of total electric weight, wherein:

Described shore container crane device is as power plant, and it comprises again strutting system, running gear for trolley, lifting mechanism, suspender and weight and computer management system,

Described strutting system comprises column 2 and crossbeam 3, strutting system is used for fixing and transmitting longitudinal power by column, crossbeam is vertically fixed on column, and crossbeam is provided with track, thereby on crossbeam, walks and complete the horizontal displacement of suspender and weight for running gear for trolley.

Described running gear for trolley comprises dolly 4, vehicle motor (not shown) and parallel motion range encoder (not shown), dolly is by the track interlock on its train and crossbeam, the wheel that described parallel motion range encoder is installed on dolly is fastened, be used for gathering dolly parallel motion distance, parallel motion range encoder is connected with computer management system (not showing in Fig. 1 to Fig. 3).

Described lifting mechanism comprises steel rope 5, lifting motor (not shown) and lifting altitude coder (not shown), one end of described steel rope hangs on suspender and weight on dolly by fixed pulley (not shown), the other end of steel rope 5 is connected with lifting motor mouth, thereby completes suspender and weight vertical displacement movement; Described lifting altitude coder is installed on fixed pulley, and for gathering the lifting altitude of suspender and weight, lifting altitude coder is connected with computer management system.

Described computer management system comprises treater and the Liquid Crystal Display with simple process function, treater receives the data that come from parallel motion range encoder, the collection of lifting altitude coder, and shows level and corresponding speed, the distance parameter of vertical displacement by Liquid Crystal Display.

For actual job needs, described strutting system bottom arranges cart walking mechanism, is fixed on cart walking mechanism by column.Cart walking mechanism setting rests in ground grading.This cart walking mechanism moves along ground rail for whole shore container crane before measuring, and adjusts and determines optimum fixing site, and the energy that therefore cart walking mechanism consumes is not counted in energy and consumes in sum.Described feed circuit, for three-phase three-wire system feed circuit, structure comprises high-tension switch cabinet, main transformer, lift control cabinet, dolly control housing and cart control housing, described lift control cabinet, dolly control housing and cart control housing are as the power plant input end of three parallel joins of shore container crane device, and described lift control cabinet, dolly control housing and cart control housing are connected respectively lifting motor, vehicle motor and cargo motor; Between main transformer and these power plant input ends, be to be connected by three-phase three-wire system feed circuit, harbour external power is connected to main transformer input end by high-tension switch cabinet.Described device for measurement of electrical energy, this device for measurement of electrical energy is connected to three-phase (circuit A, B, C three-phase) three wire system feed circuit, and it is measured, and can measure and record lift control cabinet, dolly control housing input electric weight, and its mode of connection is shown in Fig. 4.Physics formation is made up of main frame, voltage sensor (ch1, ch2), current sensor (ch1, ch2), telltale and some wires, voltage sensor, current sensor are connected with main frame input end respectively, host output end is connected with telltale, with the annexation of three-phase three-wire system feed circuit is:

Voltage sensor ch1 measures the line voltage between A phase and B phase, that is: the anodal connection circuit A phase of voltage sensor ch1, negative pole connection circuit B phase.

Voltage sensor ch2 measures the line voltage between C phase and B phase, that is: the anodal connection circuit C phase of voltage sensor ch2, negative pole connection circuit B phase.

Current sensor ch1 measures A phase current, and current sensor ch2 measures C phase current, that is: current sensor ch1 connection circuit A phase, current sensor ch2 connection circuit C phase.

The utility model shore container crane efficiency measuring system, can be applicable to adopt average weighted efficiency method of measurement based on load condition rank.Method is described below:

(1) adopt method of weighted mean to be optimized the quality of loads of measuring in test based on load condition rank.

Account for the ratio situation of total degree according to rubber tyre gantry crane design life period about the size of load value and corresponding lifting times, the load condition rank of shore container crane is divided into level Four, represents with Q1, Q2, Q3, Q4, as shown in table 1.

Table 1 load condition rank

Visible, when shore container crane design, take into full account its life expectation internal load service condition.Generally, user also uses according to this load condition.So, the measurement of efficiency also should be determined the quality of loads of measuring in test based on actual conditions.Therefore, adopt the efficiency method of measurement of method of weighted mean, the method proposes weighted mean available energy Q _y, weighted mean is supplied with can Q _gnew ideas and computing formula thereof.So-called " weighted mean available energy " referred in the test period, the available energy under each typical load working condition and coefficient of weight k _ithe sum of products.So-called " weighted mean supply with can " refers in the test period, the supply under each typical load working condition can with coefficient of weight k _ithe sum of products.Efficiency η equals weighted mean available energy Q _ysupplying with weighted mean can Q _gratio.Its core concept whether simple using 60% nominal payload as test load the energy consumption of a duty cycle of test, carry out repeatedly cyclic test but get multiple typical load as test load, by its equivalence to one duty cycle.

As shown in the table, list several typicalnesses of load, 30%, 50%, 60%, 80%, 100% of nominal payload, typical load G _ican select accordingly.According to " explanation " in load condition rank, descriptive statement is qualitatively quantized.(1) load condition is quantized.So-called " compared with underload " refer to load taking rated load weight 30% as main, be less than rated load weight 50%; " medium load " refer to taking nominal payload 50% and 60% as main; " heavier load " refer to taking nominal payload 80% as main.(2) the ratio situation that lifting times corresponding to typical load is accounted for to total degree quantizes." often " is quantified as and accounts for 75% of total degree, and " more " is quantified as and accounts for 60% of total degree, and " sometimes " is quantified as and accounts for 15% of total degree, and " less " is quantified as and accounts for 5% of total degree, and " seldom " is quantified as and accounts for 2% of total degree.As shown in following table 5.7.

The corresponding typical load of table 2 load condition rank and corresponding lifting times account for the ratio of total degree

In the time measuring, not simply to get constant-acting load as test load, measure as test load but choose respectively several typical load, and adopt average weighted method to be equivalent to a duty cycle whole measuring period according to the ratio situation that typical load lifting times in life expectation accounts for total degree.

(2) computing formula of available energy.If test load quality is G _i, working cycle available energy Q of shore container crane _yicomputing formula can be optimized for:

$\begin{array}{c}{Q}_{\mathrm{Yi}}=9800G_0{H}_0+500G_0{v}_0^2+\\ 9800G_0\mathrm{\μ}{S}_0+500G_0{v}_0^{\′2}+\\ 9800(G_i+G_0)H_i+500(G_i+G_0)v_i^2+\\ 9800(G_i+G_0)\mathrm{\μ}{S}_i+500(G_i+G_0)v_i^{\′2}\end{array}$

In formula:

Q _yithe available energy in the cycle of doing one's assignment, unit is joule (J);

G _ifreight container quality of loads, unit is ton (t);

G ₀suspender quality, unit is ton (t);

H ₀when unloaded, the height that suspender hoists, unit is rice (m);

H _ithere is the time of carrying, the height that freight container hoists, unit is rice (m);

V ₀when unloaded, the speed of the suspender that hoists, unit is metre per second (m/s) (m/s);

V' ₀when unloaded, the speed of trolley travelling, unit is metre per second (m/s) (m/s);

V _ithere is the time of carrying, the speed of the freight container that hoists, unit is metre per second (m/s) (m/s);

V _i' there is the time of carrying, the speed of trolley travelling, unit is metre per second (m/s) (m/s);

S ₀when unloaded, the distance of trolley travelling, unit is rice (m);

S _ithere is the time of carrying, the distance of trolley travelling, unit is rice (m);

Friction coefficient between μ steel wheel and rail, gets 0.015;

(3) while measuring test, lifting altitude and dolly miles of relative movement should be concrete numerical value, it should not a scope, can specify that its value is peaked 60%, so both can reflect qualitatively the variation tendency of efficiency, can effectively avoid again same shore container crane measure at every turn gained efficiency value all different situation occur.

(4) measurement procedure can be shown in Figure 6.At least repeated test three times under every kind of operating mode of every kind of typical load of each mechanism, the operating data such as reading speed, distance on the computer management system telltale of the shore container crane device from the utility model, measure and supply with energy by the device for measurement of electrical energy in the utility model, get the center line average values of three subnormal observed readings.Concrete test procedure is as follows:

A) lifting mechanism is with command speed zero load (being only with suspender) lifting, and lifting altitude should equal 60% of specified lifting altitude;

B) dolly is with command speed zero load (being only with suspender) operation, and the distance of trolley travelling should equal 60% of nominal distance;

C) with command speed lifted load, quality of loads is got typical lifted load G1, lifting altitude and A) in highly identical;

D) lifted load G ₁to A) described in height, dolly is with command speed run with load, the distance of trolley travelling and B) middle distance is identical;

E) quality of loads is got typical lifted load G successively ₂, G ₃... and G _maxreplace G ₁, repeating step C) and D).

First the parameters data that, go out by the measuring table display exhibits in the utility model are carried out the calculating of available energy.Quality of loads is G _itime, working cycle available energy Q of shore container crane _yicomputing formula be:

$\begin{array}{c}{Q}_{\mathrm{Yi}}=9800G_0{H}_0+500G_0{v}_0^2+\\ 9800G_0\mathrm{\μ}{S}_0+500G_0{v}_0^{\′2}+\\ 9800(G_i+G_0)H_i+500(G_i+G_0)v_i^2+\\ 9800(G_i+G_0)\mathrm{\μ}{S}_i+500(G_i+G_0)v_i^{\′2}\end{array}$

In formula:

Q _yithe available energy in the cycle of doing one's assignment, unit is joule (J);

G _ifreight container quality of loads, unit is ton (t);

G ₀suspender quality, unit is ton (t);

H ₀when unloaded, the height that suspender hoists, unit is rice (m);

H _ithere is the time of carrying, the height that freight container hoists, unit is rice (m);

V ₀when unloaded, the speed of the suspender that hoists, unit is metre per second (m/s) (m/s);

V' ₀when unloaded, the speed of trolley travelling, unit is metre per second (m/s) (m/s);

V _ithere is the time of carrying, the speed of the freight container that hoists, unit is metre per second (m/s) (m/s);

V _i' there is the time of carrying, the speed of trolley travelling, unit is metre per second (m/s) (m/s);

S ₀when unloaded, the distance of trolley travelling, unit is rice (m);

S _ithere is the time of carrying, the distance of trolley travelling, unit is rice (m);

Friction coefficient between μ steel wheel and rail, gets 0.015;

The calculating of weighted mean available energy, test period weighted mean available energy Q of shore container crane _ycomputing formula be:

$\begin{array}{c}{Q}_Y=\mathrm{\Σ}{\mathrm{\η}}_i{Q}_{\mathrm{Yi}}=9800G_0{H}_{0}500G_1{v}_0^2+\\ 9800G_0\mathrm{\μ}{S}_0+500G_1{v}_0^{\′2}+\\ \mathrm{\Σ}{k}_i[9800(G_i+G_0)H_i+500(G_i+G_0)v_i^2]+\\ \mathrm{\Σ}{k}_i[9800(G_i+G_0)\mathrm{\μ}{S}_i+500(G_i+G_0)v_i^{\′2}]\end{array}$

Secondly, supply can adopt the device for measurement of electrical energy in the utility model to test, and a test period weighted mean supply can Q _gcomputing formula as follows:

Q _G＝Q _G0+∑η _iG _Gi＝3.6×10 ⁶(D ₀+∑k _iD _i)

In formula: Q _gbe a test period weighted mean supply energy, J; D ₀for steps A under idle condition) and the B) value that records, kWh; D _i-when lifted load be G _itime, step C in working cycle) and the D) value that records, kWh.

Finally, the calculating of efficiency.The computing formula of efficiency is as follows:

$\mathrm{\η}=\frac{Q_Y}{Q_G}\×100\%=\frac{\mathrm{\Σ}{k}_i{Q}_{\mathrm{Yi}}}{\mathrm{\Σ}{k}_i{Q}_{\mathrm{Gi}}}\×100\%=\frac{\mathrm{\Σ}\frac{C_i}{C_T}{Q}_{\mathrm{Yi}}}{3.6\×10^6\×\mathrm{\Σ}\frac{C_i}{C_T}{D}_i}\×100\%$

In formula: η is efficiency; Q _yit is a weighted mean available energy in test period; Q _gbe that a weighted mean in test period is supplied with energy.

Claims (1)

1. a shore container crane efficiency measuring system, is characterized in that, comprising: shore container crane device, feed circuit and device for measurement of electrical energy, wherein:

Described shore container crane device comprises again strutting system, running gear for trolley, lifting mechanism, suspender and weight and computer management system,

Described strutting system comprises column and crossbeam, and crossbeam is vertically fixed on column, and crossbeam is provided with track;

Described running gear for trolley comprises dolly, vehicle motor and parallel motion range encoder, dolly is by the track interlock on its train and crossbeam, the wheel that described parallel motion range encoder is installed on dolly is fastened, and parallel motion range encoder is connected with computer management system;

Described lifting mechanism comprises steel rope, lifting motor and lifting altitude coder, and one end of described steel rope hangs on suspender and weight on dolly by fixed pulley, and the other end of steel rope is connected with lifting motor mouth; Described lifting altitude coder is installed on fixed pulley, and lifting altitude coder is connected with computer management system;

Described computer management system comprises interconnective treater and Liquid Crystal Display, treater has simple process function, treater is connected with parallel motion range encoder, lifting altitude coder respectively, treater receives the data that come from parallel motion range encoder, the collection of lifting altitude coder, and shows level and corresponding speed, the distance parameter of vertical displacement by Liquid Crystal Display;

Described feed circuit, for three-phase three-wire system feed circuit, structure comprises high-tension switch cabinet, main transformer, lift control cabinet and dolly control housing, described lift control cabinet and dolly control housing parallel join, and described lift control cabinet, dolly control housing connect respectively lifting motor, vehicle motor; Between main transformer and lift control cabinet, dolly control housing, be to be connected by three-phase three-wire system feed circuit, harbour external power is connected to main transformer input end by high-tension switch cabinet;

Described device for measurement of electrical energy, this device for measurement of electrical energy is connected to feed circuit; Described device for measurement of electrical energy is made up of main frame, voltage sensor, current sensor and telltale, and voltage sensor, current sensor are connected with main frame input end respectively, and host output end is connected with telltale.