CN2216674Y

CN2216674Y - Automatic pachymeter for measuring thickness of coating of can wall

Info

Publication number: CN2216674Y
Application number: CN 94223316
Authority: CN
Inventors: 王德春; 王书铨; 齐丽娟; 王义杰; 王武生; 宫海
Original assignee: OIL FIELD BUILDING CO DAQING PETROLEUM ADMINISTRATION; HAERBIN SCIENTIFIC AND TECHNOLOGICAL UNIV
Current assignee: OIL FIELD BUILDING CO DAQING PETROLEUM ADMINISTRATION; HAERBIN SCIENTIFIC AND TECHNOLOGICAL UNIV
Priority date: 1994-10-05
Filing date: 1994-10-05
Publication date: 1996-01-03
Anticipated expiration: 2004-10-05

Abstract

The utility model relates to an automatic thickness measurer for measuring the coat thickness of a can wall, belonging to measuring equipment for measuring the coat thickness. The utility model is formed by that a truck frame is provided with an electrode whose shaft is provided with a driving tooth-shaped wheel, a tooth-shaped belt on the driving tooth-shaped wheel is in linkage with a driven tooth-shaped wheel, the driving wheel and the driven tooth-shaped wheel are installed on the same shaft, a magnetic thrust wheel and a directive wheel installed under the truck frame are driven by the tooth-shaped belt on the driving wheel, and the truck frame is provided with a probe mechanism. The detection mechanism is controlled by controlling equipment whose core is the minimum system of a monolithic computer. The equipment can display and print test results in real time, having the advantages of higher self control level, favorable flexibility, high detection precision, favorable stability, and convenient operation. The utility model is an ideal thickness measurer for measuring the coat thickness.

Description

Tank skin coating automatic measuring thickness instrument

A kind of tank skin coating automatic measuring thickness instrument belongs to the metering outfit of measuring coating thickness.

After steel profit basin carries out whole antiseptic project, need its internal and external anti-corrosive coating thickness is detected, at present the method that adopts is the framing scaffold of setting up framing scaffold or setting up during by anticorrosive construction at the inside and outside wall of jar earlier, quality inspection personnel stands on the framing scaffold hand-held portable magnetic thicknessmeter and carries out the detection of coating thickness, its concrete way is to locate to get at random respectively a little to inspect by random samples at tank deck, tank skin and jar end etc., the numerical value at record sampling observation point place carries out mathematical statistics, and the average thickness of asking for each point that coating is surveyed is coating thickness.In order to guarantee that measured result tallies with the actual situation, the sum of sampled point should be less than 10% of tank volume cubic meter number, and divides each one at jar to carry out thickness measuring by area ratio, and be example with the 1000m jar: actual measurement is counted should be less than 1000 * 10%=100 point.When carrying out the measurement of these 100 dot thickness values, quality inspection personnel needs to climb down on framing scaffold swashes, the heavy inconvenience of metering system, efficient is low, and also need do mathematical statistics after surveying and to ask for average thickness values, basin measurement for big volume is difficult to more realize that be difficult to detect truly its quality results, the state of the art is more backward comprehensively.

The purpose of this utility model is to avoid above-mentioned problems of the prior art, providing a kind of is installed in measuring sonde on the pick-up unit of creeping, by detection system make its on the vertical surface of tank skin or creep automatically in the tank top and finish automatically by specific step pitch measurement, its testing result as calculated machine provide after handling, can replace the tank skin coating automatic measuring thickness instrument that quality inspection personnel detects.

The utility model is realized with following technical scheme: comprise measuring mechanism, control and display device.Measuring mechanism by vehicle frame, be installed in install on motor on the vehicle frame, the motor power output shaft flute profile wheel initiatively, initiatively be provided with on the flute profile wheel flute profile band width thus the interlock of flute profile band be installed in passive flute profile wheel on the vehicle frame, take turns coaxial installation driving wheel, the flute profile band be set on it and link and be installed in the probe mechanism of installing on magnetic thrust wheel, angle sheave and the vehicle frame under the vehicle frame and constitute by this flute profile band with passive flute profile.This testing agency is visited in the single-chip minimum system being the control device that core constitutes.

Principle of work is as follows:

Thicknessmeter is used to measure the nonmetallic coating thickness of ferromagnetism substrate, adopts magnetoresistance method thickness measuring coating thickness.Its service part is a magnetic Thicknesser probe, is installed in magnetic force absorption tank skin and creeps in the testing agency, after automatic control alkali is surveyed step pitch of mechanism's walking, stop and detect, detection probe is stretched out measurement, withdrawal automatically again after the measurement, and the flexible of probe controlled by control device.Detection signal is in transmission cable is transferred to single-chip computer control system, through A/D conversion and data processing, show testing result by charactron, testing agency is by being the minimum system control that core is formed with the single-chip microcomputer, and can import its kinematic parameter by operation keyboard: comprise traffic direction: advance, retreat, turn left, turn right; The speed of travel: 0～7.5m/min; Walking step pitch: 1m, 2m, 3m; But testing agency also limit operation frontier inspection surveys, in real time with measuring point count and one-tenth-value thickness 1/10 shows.Testing agency is adsorbed on the tank skin reliably by the magnetic thrust wheel, is driven by torque motor, through the transmission of flute profile band, rotates the operation of driving testing agency thereby drive the magnetic thrust wheel, and when two motors were just changeing, dolly was forwards to operation; When the counter-rotating of two motors, the dolly direction motion of drawing back; When two motors were reverse direction and rotate, dolly realized or turns right, and the adjusting of the speed of a motor vehicle realizes by the output voltage that changes power supply, but when car runs into barrier under steam automatic stopping.

The beneficial effect that the utility model had: the tank skin coating thickness detector is a kind of electromechanical integration equipment, under the control of single-chip microcomputer, has higher automatic control level and good maneuverability, the accuracy of detection height, its precision is the 3%+1 μ m of measured value, and measurement range reaches 0～500 μ m, and the repeated detection repdocutbility is stable, and can import by keyboard, revise various parameters, easy to operate, and can show, print measurement result in real time.The speed of travel of this instrument: 0～7.5m/min measures step pitch: 1m, 2m, 3m, and its obstacle clearing capability can reach 12mm, therefore, can be widely used in the various basins of petrochemical industry, the measurement of equipment anticorrosion coating thicknesses such as hull, large-sized boiler.

Describe the utility model in detail below in conjunction with drawings and Examples.

Fig. 1 is the synoptic diagram of tank skin coating automatic measuring thickness instrument;

Fig. 2 is the front view of tank skin coating automatic measuring thickness instrument chassis;

Fig. 3 is the upward view of tank skin coating automatic measuring thickness instrument chassis;

Fig. 4 is a tank skin coating automatic measuring thickness instrument bogie frame partial view;

Fig. 5 is the revolved sectional view of one group of magnet pulley of tank skin coating automatic measuring thickness instrument;

Fig. 6 is a tank skin coating automatic measuring thickness instrument probe mechanism cut-open view;

Fig. 7 is tank skin coating automatic measuring thickness instrument power dynamic control circuit figure.

Fig. 1～Fig. 7 has provided the structural representation and the power dynamic control circuit figure of a kind of most preferred embodiment of the utility model, it by testing agency be chassis 6, control chassis 6 by control system 3, show 4, control and display device that printer 2,1 is formed, various data and parameter are via cable 5 transmission compositions.Symmetry is installed two torque motors 7 on the frame cross 22 of described chassis 6, its power output shaft 30 is associated with initiatively flute profile wheel 29, flute profile band 33 is set on it, the transmission of flute profile band 33 drives the passive flute profile wheel 34 that will be contained on the vehicle frame, take turns 34 coaxial 36 with passive flute profile driving wheel 11 is installed, axle 36 is fixed on the car frame side beam 37 by diaxon bearing 9,80100 rolling bearings 35 are housed in the bearing seat 9, driving wheel 11 is provided with flute profile band 12, the coiling of flute profile band 12 drives the symmetrical magnetic thrust wheel 13 that is installed under the vehicle frame, 15,18,19, stretching pulley 17 and wheel shaft 16, guiding flute profile wheel 21 rotates, and makes the gyration of driving wheel become the rectilinear motion of testing agency's chassis 6.The function of driving wheel 11 is coiling flute profile bands.Forming testing agency is the driving force that chassis 6 travels, and the flute profile band 12 that is provided with on the driving wheel 11 is to contact with tank skin to produce driving force, and adopting elastic layer is the polyurethane flute profile band of wire rope.Be magnet steel 28 in the middle of each magnetic thrust wheel, cooperate with sliding bearing 50 by axle 42, hinged by bearing pin 46 by a pair of mutually hinged inner balance arm 31, outer balance arm 32, wherein outer balance arm 32 usefulness bolts 49, nut 45 are fastened on the web joint 8 on the frame cross 22.Bearing spring 14 is contained in the left and right spring base 47,43, and spring base 47,43 is linked to each other with inside and

outside balance arm

31,32 respectively by attachment screw 44.Wherein outer balance arm 32 can be around the swing of chassis 6 axletrees 49, and bearing spring 14 can bear car body weight and slow down impact to car body under steam.Be that the stretching pulley of stating 17 is fixed on the end face of motor 7, but its clamping flute profile band 12 prevents the slippage of this band, guiding flute profile wheel 21 is connected on the rotation axis 20, by the securable flute profile band 12 of tensioning system, in chassis 6 front sides tensioning system is housed, during tensioning, unclamp set

nut

24,26, rotary screw 28, promote slide block 25 by hold-down nut 27, force guiding flute profile wheel shaft 20 to move to right, thus tensioning flute profile band 12.The chassis 6 anterior probe mechanisms of installing, provide its structure by Fig. 6, it is by solenoid valve 38, axle sleeve 54 is installed in its valve body top, axle sleeve 54 is fastened on the base plate 40 by axle bed 55, axle sleeve 54 is built-in with top thick stick 56, top thick stick 56 slides along axle sleeve 54, through coupling shaft 52 multi pack levers 51, lever 51 can rotate around axle 52, be fastened on base plate 40 by support plate 53, and base plate 40 is packed on the vehicle frame 22 by web joint 39, be equipped with rolling bearing 64 at lever 51 front ends, connecting link 60 is housed on it, and connecting link 60 passes by axle bed 61 and is fixed on axle sleeve 62 on the base plate 40, orienting sleeve 57 and Lower shaft sleeve 59 also slide within it, are set with spring 63 on the connecting link 60 between rolling bearing 64 and the base plate 40, probe 41 is installed in connecting link 60 lower ends, and probe 41 outer pocketed springs 58 are formed.The course of work of probe mechanism is as follows: when measuring coating thickness, probe 41 contact with measured surface, and detection finishes, pop one's head in 41 under the effect of spring 63 rising leave tank skin.Chassis 6 is when stopping detection, solenoid valve 38 energized, move on the magnet valve body and promote top thick stick 56, make lever 51 counter-clockwise swings, lever left end rolling bearing 64 promotes connecting link 60 and moves down, and this moment, spring 63 was compressed, drive measuring sonde 41 and be displaced downwardly to measured surface, when the amount of moving down surpasses aequum, move on the probe 41, compression spring 58 makes the required distance of measuring sonde 41 displacements.Be parked in for a certain reason on the tank skin when detecting chassis 6, the handle 10 on the available safety apparatus trailer is towed back to.When meeting impassable obstacle when detecting, the road that is provided with on the touching car hinders sensor 23 back automatic stoppings, to guarantee safety.Detection signal is transferred to through transmission cable 5 and detects in the control system 3, and treated data are printed on the printer paper 1 and by display device 4 by printer 2 and provide real-time demonstration.Fig. 7 has provided the power dynamic control circuit figure of motor, it through K switch by and be connected in Switching Power Supply 4NICK1 and 4NICK2 on the power supply, their

output terminal

10,9 and 11,12 are connected to respectively by resistance, after being controlled by the relay tip elder generation serial connection of single-chip minimum system, 4 groups again and connect, be R3-J1, R5-J2, R7-J3, after being connected in series respectively, R9-J4 is connected on the output terminal 9 and 10 of 4NICK1, R4-J5, R6-6, R8-J7, after being connected in series respectively, R10-J8 is connected to the output terminal 11 of 4NICK2, on 12, the relay tip J9 and the J13 that are controlled by single-chip minimum system, J14 and J10 one end are connected to the output terminal 5 of 4NICK1 respectively, on 6, and J9 and J14, the J13 and the J10 other end are connected on the vehicle frame right side respectively and adorn on the motor two ends, J11 and J15, J16 and J12 one end are connected to the output terminal 7 of 4NICK2 respectively, on 8, and J11 and J16, the J15 and the J12 other end are connected to respectively and constitute motor power power system control circuit on the motor of being installed in the vehicle frame left side, but by the single-chip microcomputer type selecting is the voltage swing and the polarity of 8098 Single-chip Controlling motor, thereby makes chassis 6 realize advancing with different speed, retreat, turn left, various operations such as right-hand rotation detect.

Control procedure is as follows:

After the K switch closure, the 220V supply voltage is added in the

input end

1,2 and 3,4 of Switching Power Supply 4NICK1,4NICK2 respectively, change the sample resistance value of 9,10 and 11,12 of Switching Power Supply output terminals, can obtain the correspondent voltage output valve at the

output terminal

5,6 and 7,8 of Switching Power Supply.When 8098 single-chip microcomputers during by software programming pilot relay normal opened contact J1, J5 adhesive, the

output terminal

5,6 and 7,8 of Switching Power Supply is exported the DC voltage of 15V, 8A respectively, relay contact J9, J10 and J11, J12 adhesive under the control of single-chip microcomputer, this output voltage is added on the motor respectively, drive motor just changes, and driving detection chassis 6 by gear train is that 3m/min advances with 0 speed.In like manner, difference attracting electric relay contact J2, J6 and J3, J7; When J4, J8, the

output terminal

5,6 and 7,8 of Switching Power Supply obtains the magnitude of voltage of 18V, 21V and 24V respectively, and making motor drive detect chassis 6 by gear train is that the speed of 7m/min is advanced with 1 speed, 2 speed, 3 speed.When two couples of relay contact J13, J14 and J15, J16 suction platform, switch power source output voltage adds on the control end of two motors 7 with negative polarity, makes the motor counter-rotating, and chassis 6 retreats with corresponding speed.When relay contact J9, J10 adhesive and J15, J16 adhesive, the control end of right motor adds positive polarity control voltage, and the control end of left motor adds negative polarity control voltage, makes and detects chassis 6 pivot turns.The angle that control detection chassis 6 pickup time when changing two couples of relay contact J9, J10 and J15, J16 adhesive bends to right; In like manner, the suction platform time when changing two couples of relay contact J13, J14 and J11, J12 adhesive, control the angle that chassis 6 is turned left.For guaranteeing that detecting chassis 6 can vertically reliably stop on the wall, still the control end at two motors adds that 6V keeps voltage when the run-stopping status of chassis 6, make it be operated in the stall state, this moment, relay contact J1～J15 all disconnected, to guarantee that chassis 6 can stop on the vertical wall reliably.

Tank skin coating automatic measuring thickness instrument technical feature is as follows:

Power supply: AC220V ± 10% 50HZ

Measurement range: 0～500 μ m

Measuring accuracy: measured value 3%+1 μ m

The speed of travel: 0～7.5m/min

Measure step pitch: 1m, 2m, 3m

Obstacle clearing capability :≤12mm

Radius of turn: 〉=0.5m

This thicknessmeter can replace quality inspection personnel and finish detection automatically, shows, prints maximal value, minimum value, mean value and mean deviation and the measurement curve of testing result in real time, is the desirable instrument of tank skin coat thickness detection.

Claims

1, a kind of tank skin coating automatic measuring thickness instrument, comprise measuring mechanism, control and display device, it is characterized in that measuring mechanism installs flute profile wheel initiatively and taken turns, taken turns coaxial installation driving wheel with passive flute profile by the passive flute profile that the flute profile band interlock of configuration it on is installed on the vehicle frame by being installed on motor on the vehicle frame, the motor power output shaft, be installed in the probe mechanism of installing on magnetic thrust wheel, angle sheave and vehicle frame vehicle frame under by the flute profile band interlock that is provided with on it and constitute, and to be controlled by with the single-chip minimum system be the control device of core formation.