Ship steel plate flatness measuring method

Abstract

According to the ship steel plate flatness measuring method, a rectangular guiding rule is arranged, the guiding rule is horizontally placed, sliding grooves are formed in the two sides of the guiding rule in the length direction of the guiding rule, a measuring device is provided with pulleys, the pulleys are located in the sliding grooves, and the measuring device is slidably connected with the guiding rule through the pulleys; the measuring device is provided with a collection and distribution box, a measuring probe is arranged on the side face of the collection and distribution box, a battery, a supercharger, an emitter and a transmitter are arranged in the collection and distribution box, and the measuring probe is connected with the battery in the collection and distribution box through an electric wire. The bottom plate is in contact with the side, with the button magnet, of the guiding rule, the side, with the protrusion, of the guiding rule is in contact with an inner shell plate of a ship body, the probe and the digital display panel switch are turned on, the probe is zeroed, the guiding rule is remotely controlled to move and stop through mobile phone Bluetooth, or the guiding rule is manually pushed to move, and automatic measurement is conducted through the measuring probe. Data measured by the measuring probe is transmitted to the digital display panel, and the digital display panel automatically displays numerical values and observes numerical value conditions in real time. The measuring efficiency is improved, and the number of operators is reduced.

Description

Technical Field

[0001] The invention belongs to the field of marine ship design and construction, and in particular relates to a method for measuring the flatness of a ship steel plate. Background Art

[0002] In the field of shipbuilding, it is necessary to measure the flatness of steel plates in each process and construction stage of the hull structure. If there is any deviation, it should be repaired in time to ensure the construction accuracy. Each process and construction stage includes steel plate cutting, splicing, segmented assembly, and overall assembly welding.

[0003] Taking the inner hull plate of the cargo hold of an LNG ship as an example, a straightedge (a horizontal ruler of an I-beam), a feeler gauge, and a steel plate ruler are used to measure the gap between the inner hull plate and the straightedge. The measurement method is to use a straightedge on the upper surface of the inner hull plate as the reference line. A 4 or 7mm high magnet is embedded in the fulcrum at the lower end of the straightedge. To measure the raised position, the fulcrum end of the straightedge is in contact with the measuring surface, and the feeler gauge is inserted for detection; to measure the concave position, the straight surface of the straightedge is in contact with the measuring surface to measure the concave amount. Tolerance requirements: The extreme value of any point measured by a 1-meter or 3-meter straightedge is ±4mm. The 1-meter straightedge measures the flatness of the inner hull plate between one longitudinal rib ≤4mm; the 3-meter straightedge measures the flatness of the inner hull plate between three longitudinal ribs, the structural point ≤4mm, and the soft point ≤7mm. See the tolerance standard Figure 1 .

[0004] The existing method is inconvenient to operate, with large reading errors. It is necessary to measure at the section where the inner shell is located. Sometimes, when measuring at low or high points, it is necessary to lie on the ground or climb a ladder, and a large number of people are required. The amount of measurement data is large, and multi-point measurement is required. Manual measurement readings have large errors and low efficiency. Different areas have different tolerance requirements, and data conversion is required, which is cumbersome. Data entry is slow. Multiple factors lead to low measurement efficiency. Different structures use different lengths of rulers, and different tolerance standards, which leads to data conversion. Data entry is slow due to manual typing of data into the computer. Summary of the invention

[0005] In order to solve the above problems, the present invention provides a method for measuring the flatness of a ship steel plate, aiming to improve the measurement accuracy and efficiency. The technical solution adopted is: A method for measuring the flatness of a ship steel plate includes a rectangular ruler, which is placed horizontally, and has sealing plates fixed at both ends. A button magnet is embedded in the upper surface of the ruler, and a downward protrusion is provided on the lower surface, and a magnet is provided in the protrusion. Slide grooves are provided on both sides of the ruler and along the length direction of the ruler. The measuring device has a pulley, and the pulley is located in the slide groove. The measuring device is slidably connected to the ruler through the pulley. The length of the sealing plate is the same as the width of the ruler, and the sealing plate blocks both ends of the slide groove to prevent the pulley from sliding out of the two ends of the slide groove.

[0006] The measuring device has a square base plate with pulleys fixed at the four corners of the base plate. The pulleys are located below the base plate. A distribution box is fixed above the base plate. A measuring probe is arranged on the side of the distribution box. A battery, a booster, a transmitter and a transmitter are arranged in the distribution box. The measuring probe is connected to the battery in the distribution box through wires.

[0007] The bottom plate contacts the side of the ruler with the button magnet, and the raised side of the ruler contacts the hull plate of the ship. Turn on the probe and the digital display tablet, adjust the probe to zero, use the mobile phone Bluetooth remote control to move and stop the ruler, or manually push the ruler to move, use the measuring probe to automatically measure, transmit the data measured by the measuring probe to the digital display tablet, and the digital display tablet automatically displays the value, and observe the value in real time.

[0008] In the above-mentioned method for measuring the flatness of ship steel plates, further, the length of the ruler is 1 meter or 3 meters.

[0009] In the above-mentioned method for measuring the flatness of a ship steel plate, further, an external connector is provided on the top of the assembly box, the wire is connected to the battery through the external connector, and the other end is connected to the measuring probe.

[0010] The above-mentioned method for measuring the flatness of ship steel plates further comprises: a probe support plate is arranged between the assembly box and the bottom plate, the probe support plate is an L-shaped plate, one wing plate of the L-shaped plate is fixed to the bottom plate, and the other wing plate is downward, and the measuring probe is fixed on the downward wing plate.

[0011] In the above-mentioned ship steel plate flatness measurement method, further, the pulley is connected to the bottom plate through a connecting plate, one end of the connecting plate is connected to the pulley, and the other end is connected to the bottom plate. From bottom to top, each pulley is connected to the bottom plate and the connecting plate in turn through a bolt, and fixed with a nut.

[0012] In the above-mentioned method for measuring the flatness of a ship steel plate, further, the bottom plate width is greater than the width of the ruler, and the upper surface of the ruler is clamped between four pulleys of the measuring device, such as the connection between the wheels of a train and the rails. In the above-mentioned ship steel plate flatness measurement method, further, the measuring probe is connected to the transmitter signal, and the measuring probe transmits the measured data to the digital display tablet via the transmitter. The probe can be connected to the mobile phone Bluetooth to control the start and stop of the device and the distance measurement of the probe.

[0013] In the above-mentioned method for measuring the flatness of a ship steel plate, further, the digital display flat panel is provided with a display light, which is a green light and a yellow light, and has a voice-controlled alarm. When the data meets the tolerance, the green light is on; when the data exceeds the tolerance, the yellow light is on and an alarm is sounded. The tolerances of different structures are measured and entered into the chip of the flat panel, and the corresponding tolerance standard can be selected according to the working conditions. The flat panel can display the maximum value, minimum value and random value measured within the selected interval.

[0014] The beneficial effects of the present invention are: 1. The measuring device adopts sliding measurement instead of fixed-point measurement to improve measurement efficiency.

[0015] 2. The measuring device only requires one person to operate, reducing the number of people.

[0016] 3. The measuring device automatically reads and alarms, reducing the workload of reading, finding problem points, and data conversion.

[0017] 4. The measuring device automatically records and uploads data, reducing data processing workload and error rate.

[0018] 5. The digital display tablet is separated from the system, and the data can be received handheld within 1 km, displaying the maximum, minimum and random values, so that the accuracy of the measured object can be quickly and intuitively understood in real time.

[0019] 6. The components of the measuring device are easily available, and the connection relationships are wire connection, bolt connection, and welding, which are easy to manufacture and assemble, reducing the R&D and production costs.

[0020] 7. The battery is rechargeable, and the use of a supercharger reduces weight, facilitates device operation, and is energy-saving and environmentally friendly.

[0021] 8. The assembly box integrates multiple components for easy operation.

[0022] 9. The panel adds motors and sensors, and the movement of the measuring device can be started and stopped by mobile phone Bluetooth remote control.

[0023] 10. Add a pulley (or bearing) and make the pulley and the groove of the ruler contact and fit. Change the sliding friction between the panel and the ruler to the rolling friction between the pulley and the ruler, reduce the vibration caused by sliding displacement, and improve the measurement accuracy.

[0024] 11. Multiple devices can be arranged in parallel to control the measurement at the same time to improve measurement efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the structure viewed from the side by a ruler; Figure 3 yes Figure 2 Schematic diagram of the medium AA viewing angle structure; Figure 4 is a schematic diagram of the side structure of the measuring device; Figure 5 is a schematic diagram of the structure of the measuring device from a top view; Figure 6 It is a schematic diagram of the use of the present invention; Figure 7 It is a three-dimensional drawing based on a ruler; Among them, 1-ruler, 2-sealing plate, 3-button magnet, 4-pulley, 5-bottom plate, 6-measuring probe, 7-slide, 8-collection box, 9-protrusion, 10-connecting plate, 11-external joint, 12-support plate, 14-measuring point, 16-segment, 18-lightening hole, 19-measuring probe. DETAILED DESCRIPTION

[0026] The present invention will be further described in conjunction with the accompanying drawings.

[0027] like Figure 1 As shown in FIG. 1 , a method for measuring the flatness of a ship steel plate includes a rectangular ruler, such as Figure 2 , 3 As shown in 7, the ruler is placed horizontally, the length of the ruler is 1 meter or 3 meters, and sealing plates are fixed at both ends. A button magnet is embedded in the upper surface of the ruler, and a downward protrusion is set on the lower surface. A magnet is set in the protrusion. Slide grooves are set on both sides of the ruler and along the length direction of the ruler. The measuring device has a pulley, and the pulley is located in the slide groove. The measuring device is slidably connected to the ruler through the pulley. The upper and lower panels of the ruler are wider, the width of the vertical support is thinner, and it has lightening holes to reduce weight.

[0028] like Figure 4 , 5 As shown, the measuring device has a square bottom plate, pulleys are fixed at the four corners of the bottom plate, the pulleys are located below the bottom plate, a collection box is fixed above the bottom plate, and a measuring probe is arranged on the side of the bottom plate. The pulley is connected to the bottom plate through a connecting plate, one end of the connecting plate is connected to the pulley, and the other end is connected to the bottom plate. A probe support plate is arranged between the collection box and the bottom plate, and the probe support plate is an L-shaped plate, one wing plate of the L-shaped plate is fixed to the bottom plate, and the other wing plate is downward, and the measuring probe is fixed on the downward wing plate. The collection box is provided with a battery, a booster, a transmitter and a transmitter, and an external connector is provided on the top of the collection box, and the measuring probe is connected to the battery through an external connector through a wire. The measuring probe is connected to the transmitter signal, and the measuring probe transmits the measured data to the digital display flat panel through the transmitter, and the measuring probe transmits the data to the transmitter wirelessly, and the measuring probe on the collection box transmits the transmitter data to the digital display flat panel. There are detachable plates on the top and bottom of the collection box, and the four vertices are bolted together for disassembling and repairing internal components. A rectangle is dug out from the center of the bottom plate, and the upper surface of the bottom plate is fillet welded along the bottom edge of the distribution box. The dug-out area is larger than the bottom size of the distribution box and smaller than the bottom size of the distribution box plus the width of the weld leg.

[0029] like Figure 6As shown, the segment is measured, the segment bottom plate is in contact with the side of the ruler with the button magnet, and the button magnet assists the measuring device to be adsorbed and fixed to the inner shell to ensure the stability of the measurement. The raised side of the ruler is in contact with the inner shell of the ship, the probe and the digital display flat panel switch are turned on, the probe is zeroed, the mobile phone Bluetooth remote control moves and stops the ruler, or the ruler is manually pushed to move, and the measuring probe is used to automatically measure the measuring point. The data measured by the measuring probe is transmitted to the digital display flat panel, which automatically displays the value and observes the value in real time. The digital display flat panel has a display light, which is green and yellow. The green light indicates that the data is qualified, and the yellow light indicates an alarm.

Claims

1. A method for measuring the flatness of a ship steel plate, characterized in that: A rectangular ruler is provided, which is placed horizontally, with sealing plates fixed at both ends, a button magnet is embedded in the upper surface of the ruler, a downward protrusion is provided on the lower surface, a magnet is provided in the protrusion, slide grooves are provided on both sides of the ruler and along the length direction of the ruler, a measuring device is provided with a pulley, the pulley is located in the slide groove, and the measuring device is slidably connected with the ruler through the pulley; The measuring device has a square bottom plate, pulleys are fixed at the four corners of the bottom plate, the pulleys are located below the bottom plate, a distribution box is fixed above the bottom plate, a measuring probe is arranged on the side of the distribution box, a battery, a booster, a transmitter and a transmitter are arranged in the distribution box, and the measuring probe is connected to the battery in the distribution box through wires; The bottom plate contacts the side of the ruler with the button magnet, and the raised side of the ruler contacts the hull plate of the ship. Turn on the probe and the digital display tablet, adjust the probe to zero, use the mobile phone Bluetooth remote control to move and stop the ruler, or manually push the ruler to move, use the measuring probe to automatically measure, transmit the data measured by the measuring probe to the digital display tablet, and the digital display tablet automatically displays the value, and observe the value in real time.

2. A method for measuring flatness of ship steel plate according to claim 1, characterized in that: The length of the ruler is 1 meter or 3 meters.

3. A method for measuring flatness of ship steel plate according to claim 1, characterized in that: An external connector is provided on the top of the distribution box, and the wires are connected to the battery through the external connector.

4. A method for measuring flatness of ship steel plate according to claim 1, characterized in that: A probe support plate is arranged between the assembly box and the bottom plate. The probe support plate is an L-shaped plate. One wing plate of the L-shaped plate is fixed to the bottom plate, and the other wing plate is downward. The measuring probe is fixed on the downward wing plate.

5. The method for measuring flatness of ship steel plate according to claim 1, characterized in that: The pulley is connected to the bottom plate through a connecting plate, one end of the connecting plate is connected to the pulley, and the other end is connected to the bottom plate.

6. A method for measuring flatness of ship steel plate according to claim 1, characterized in that: The base plate width is greater than the ruler width.

7. A method for measuring flatness of ship steel plate according to claim 1, characterized in that: The measuring probe is connected to the transmitter signal, and the measuring probe transmits the measured data to the digital display tablet via the transmitter.

8. A method for measuring flatness of ship steel plate according to claim 1, characterized in that: The digital display panel has display lights, which are green and yellow.

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