CN115824539A - Large plate girder deflection measuring system - Google Patents
Large plate girder deflection measuring system Download PDFInfo
- Publication number
- CN115824539A CN115824539A CN202310109336.0A CN202310109336A CN115824539A CN 115824539 A CN115824539 A CN 115824539A CN 202310109336 A CN202310109336 A CN 202310109336A CN 115824539 A CN115824539 A CN 115824539A
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- large plate
- measuring system
- vehicle body
- deflection measuring
- telescope tube
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- 238000005259 measurement Methods 0.000 claims abstract description 22
- 239000003550 marker Substances 0.000 claims description 18
- 238000004804 winding Methods 0.000 claims description 9
- 230000005389 magnetism Effects 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0041—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress
- G01M5/005—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress by means of external apparatus, e.g. test benches or portable test systems
Abstract
The invention discloses a large plate girder deflection measuring system which comprises an observation instrument, wherein the observation instrument comprises a magnetic base, a slide rail, a slide block telescope tube and a locking piece, the slide rail is arranged on the magnetic base, and a scale mark is arranged on the slide rail; the sliding block is slidably arranged on the sliding rail; the telescope tube is arranged on the slide block, and a collimation axis is arranged on a lens of the telescope tube; the retaining member set up in the slider, the retaining member is used for fixing the slider. According to the large plate girder deflection measuring system, the telescope tube is used for observing the point to be measured of the large plate girder, so that the telescope tube and the point to be measured of the large plate girder are located at the same height, the height value of the point to be measured is read through the scale marks, and the difference value between the height value and the zero point is the deformation quantity of the point to be measured, so that the measurement data of the deformation quantity is more accurate, and the measurement precision of the large plate girder deflection is improved.
Description
Technical Field
The invention relates to the field of deflection measurement, in particular to a deflection measurement system for a large plate girder.
Background
In the related art, the expansion amount of the utility boiler needs to be released from a cold state to a hot state in the operation process, so that the existing boiler generally adopts a suspension type structure, a main body heated part of the boiler is suspended on a large plate girder, the load is transmitted to a bearing upright post by the large plate girder, and the heated part is expanded as expected by the suspension way. Therefore, the large plate girder can generate deflection deformation due to stress, and the deflection amount is an important parameter for detecting the stability of the boiler. However, the height of the large plate girder at each position is usually measured through a communicating pipe and a straight ruler at present, and the measurement accuracy is poor.
Disclosure of Invention
The embodiment of the invention provides a large plate girder deflection measuring system which can improve the measuring precision of the large plate girder deflection.
The embodiment of the invention provides a large plate beam deflection measuring system which comprises an observation instrument, wherein the observation instrument comprises a magnetic base, a sliding rail, a sliding block telescopic lens cone and a locking piece, the sliding rail is arranged on the magnetic base, and scale marks are arranged on the sliding rail; the sliding block is slidably arranged on the sliding rail; the telescope tube is arranged on the slide block, and a collimation axis is arranged on a lens of the telescope tube; the retaining member set up in the slider, the retaining member is used for fixing the slider.
In some exemplary embodiments, the large panel beam deflection measuring system further comprises a remote control trolley comprising: a vehicle body; the marking piece is arranged on the vehicle body and used for providing an observation reference for the telescope tube; and the remote controller is in communication connection with the vehicle body and is used for controlling the vehicle body to move.
In some exemplary embodiments, the marker is disposed on the top of the vehicle body, and an end surface of the marker, which is far away from one end of the vehicle body, is a horizontal surface.
In some exemplary embodiments, the marker is shaped as a truncated cone.
In some exemplary embodiments, the vehicle body is provided with a luminous element, and the light emitting direction of the luminous element faces the marker.
In some exemplary embodiments, the remote control cart further comprises: the wheels are rotatably arranged at the bottom of the vehicle body; the piece is inhaled to magnetism, set up in the bottom of car body, along keeping away from the direction of car body bottom, the wheel compare in the piece is inhaled to magnetism keeps away from more the top of car body.
In some exemplary embodiments, the scope further includes a laser ranging member disposed on the slider, and the remote control car further includes a laser reflector disposed on the car body.
In some exemplary embodiments, the remote control cart further comprises: the winding roller is rotatably arranged on the trolley body; the protection rope is wound on the winding roller and provided with a first end and a second end, the first end is fixedly connected to the winding roller, and the second end is connected to the magnetic seat.
In some exemplary embodiments, the remote control cart further comprises: the two telescopic rods are respectively connected with the left side and the right side of the vehicle body and are arranged along the width direction of the vehicle body; and the two limiting rods are respectively connected with the two telescopic rods and are arranged along the height direction of the vehicle body.
Has the beneficial effects that: according to the large plate girder deflection measuring system provided by the embodiment of the invention, the telescope tube is used for observing the point to be measured of the large plate girder, so that the telescope tube and the point to be measured of the large plate girder are positioned at the same height, the height value of the point to be measured is read through the scale mark, and the difference value between the height value and the zero point is the deformation quantity of the point to be measured, so that the measurement data of the deformation quantity is more accurate, and the measurement precision of the large plate girder deflection is further improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural view of a girder and a column according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of a girder and a column according to another embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a large plate girder deflection measuring system according to an embodiment of the invention;
FIG. 4 is a front view of a scope according to another embodiment of the present invention;
FIG. 5 is a side view of a scope according to another embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a large plate girder deflection measuring system in another embodiment of the invention;
FIG. 7 is a schematic front view of a remote control cart according to an embodiment of the present invention;
FIG. 8 is a schematic structural diagram of a large plate girder deflection measuring system in another embodiment of the invention;
fig. 9 is a side view schematic diagram of a remotely controlled cart in accordance with another embodiment of the present invention.
Description of reference numerals: 110. observing the instrument; 111. a magnetic base; 112. a slide rail; 113. a slider; 114. a telescope tube; 115. a laser ranging unit; 120. remotely controlling the trolley; 121. a vehicle body; 122. a marker; 123. a light emitting member; 124. a wheel; 125. a magnetic member; 126. a laser reflecting plate; 127. a telescopic rod; 128. a limiting rod; 210. a girder; 220. and (4) a column.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, in an ideal state, the plate girder 210 is in a straight state, as shown in fig. 2, but in an actual state, the plate girder 210 is bent downward due to a force, h in fig. 2 represents a deformation amount of the plate girder 210 at 1/2 of its length, and the deflection of the plate girder 210 can be calculated according to the deformation amount.
In order to accurately measure the deflection of the plate girder 210, as shown in fig. 3-5, an embodiment of the invention provides a plate girder deflection measuring system, which includes a scope 110, wherein the scope 110 includes a magnetic base 111, a slide rail 112, a slide block 113, a telescope tube 114 and a locking member.
The existing boiler is basically of an all-steel structure, the large plate beam 210 and the vertical column 220 for supporting the boiler are made of steel, and the magnetic base 111 can be adsorbed on the vertical column 220. The observation instrument 110 is connected to the boiler upright column 220 through the magnetic base 111, and the observation instrument 110 does not need to be held by hands in the measurement process, so that two hands can be used for fine adjustment of a large plate beam deflection measurement system or recording of detection data. The magnetic base 111 may be configured as a permanent magnet device, and a magnetic switch is disposed on the permanent magnet device, so that the observation instrument 110 can be conveniently removed from the pillar 220 through the magnetic switch when the magnetic switch is turned off.
The slide rail 112 is disposed on the magnetic base 111, and the slide rail 112 is provided with a scale mark, which may be printed or carved. In order to improve the measurement accuracy, the measurement accuracy of the scale mark is preferably 0.1mm.
The sliding block 113 is slidably disposed on the sliding rail 112, the telescope tube 114 is disposed on the sliding block 113, and the telescope tube 114 can slide along the sliding rail 112 to facilitate observation of the bottom of the slab beam 210. The lens of the telescope tube 114 is provided with a collimation axis, which can be used as a reference line for observation. It should be noted that, in order to ensure the measurement accuracy, the moving direction of the telescope tube 114 needs to be a vertical direction, that is, the extending direction of the slide rail 112 needs to be a vertical direction, and the telescope tube 114 needs to be in a horizontal direction. To facilitate adjustment of the slide rail 112 and the telescope tube 114, a level bubble may be disposed on each of the slide rail 112 and the telescope tube 114. Of course, the telescope tube 114 may be fixedly connected to the slider 113, and when the slide rail 112 is in the vertical direction, the telescope tube 114 is necessarily in the horizontal direction.
The locking member is disposed on the slider 113, and the locking member is used to fix the slider 113. For example, the locking member may be a screw, and the screw is pressed against the sliding rail 112 by tightening the screw, so as to limit the sliding of the sliding block 113. Of course, the locking member may be provided on the slide rail 112, such that the rail clamps the slider 113 by tightening the screw.
The specific measurement method of the observation instrument 110 is as follows, firstly adjusting the angle of the observation instrument 110 to make the slide rail 112 located in the vertical direction, then fixing the observation instrument 110 on the boiler column 220 through the magnetic base 111, adjusting the telescope tube 114 to the horizontal direction, moving the position of the telescope tube 114 up and down to make the bottom of the point to be measured of the slab beam 210 coincide with the collimation axis of the telescope tube 114, and at this time, the telescope tube 114 and the point to be measured of the slab beam 210 are at the same vertical height. The bottom end of the joint of the large plate beam 210 and the upright column 220 is taken as a zero point, and the distance between the telescope column 114 and the zero point is read through the scale marks, so that the deformation amount of the point to be measured of the large plate beam 210 can be obtained. In order to observe the relative position between the telescope tube 114 and the scale marks conveniently, an indicator needle may be disposed on the telescope tube 114, the indicator needle and the collimation axis are located at the same horizontal position, and the distance between the indicator needle and the zero point is the distance between the telescope tube 114 and the zero point.
In order to improve the measurement accuracy of the deflection of the girder 210, a plurality of different positions of the girder 210 may be measured, for example, 1/2, 1/3, 2/3, etc. of the length of the girder 210. Repeating the above operations, adjusting the collimation axis of the telescope tube 114 to coincide with the bottom of the different points to be measured of the large plate beam 210, and respectively reading out the deformation of the different points to be measured of the large plate beam 210, thereby accurately calculating the deflection value.
To sum up, the deflection measuring system for the large plate girder according to the embodiment of the present invention observes the point to be measured of the large plate girder 210 through the telescope tube 114, so that the telescope tube 114 and the point to be measured of the large plate girder 210 are located at the same height, and the difference between the point to be measured and the zero point is read through the scale mark, that is, the deformation amount of the point to be measured, so that the measurement data of the deformation amount is more accurate, and the measurement accuracy of the deflection of the large plate girder 210 is further improved.
In the measurement process, as seen from the telescope tube 114, the boundary between the lowest point at the bottom of the large plate girder 210 and the air below is obvious, the position of the lowest point at the bottom of the large plate girder 210 is relatively easy to measure, and there is no obvious boundary between the upper part and the lower part of other points to be measured at the bottom of the large plate girder 210 (for example, 1/3, 2/3, etc. of the length of the large plate girder 210), so that the measurement difficulty is high. Although the difficulty of measurement can be reduced by providing a mark at each point to be measured of the girder 210, there is a risk of falling by requiring a measuring person to walk on the girder 210 and then manually mark.
As shown in fig. 6 and 7, in some embodiments, the large plate girder deflection measuring system further includes a remote control trolley 120, and the remote control trolley 120 includes a trolley body 121, a marker 122 and a remote controller. Be provided with parts such as receiver, craspedodrome motor and steering motor in the car body 121, the remote controller has the transmitter, and the remote controller passes through the receiver communication connection of transmitter and car body 121 to make car body 121 can craspedodrome and turn to, also the remote controller can control the travelling car motion.
The marker 122 is disposed on the vehicle body 121, and the marker 122 is used to provide an observation reference for the telescope tube 114. The color of the marker 122 may be significantly different from the color of the large plate girder 210, for example, the marker 122 may be a color sensitive to human eyes, such as red, so as to improve the identification. Preferably, the length of the marking element 122 in the vertical direction is greater than the maximum deformation amount of the large plate beam 210 (the difference between the lowest point and the zero point at the bottom of the large plate beam 210), and no matter whether the remote control trolley 120 is located at any point to be measured of the large plate beam 210, the boundary between the marking element 122 and the air can be observed clearly from the telescope column 114, so that the measurement difficulty is reduced.
It should be noted that, since the bottom of the large plate girder 210 protrudes and the top is recessed, and the protruding degree of the bottom is substantially the same as the recessed degree of the top, the measurement of the protruding degree of the bottom or the recessed degree of the top of the large plate girder 210 can realize the deflection measurement.
However, the concave portion of the middle portion of the top of the large plate girder 210 is blocked by the two ends of the top, so that only the bottom position of the large plate girder 210 can be observed when the large plate girder 210 is directly observed through the telescope tube 114. When observing the markers 122 of the large plate girder 210 through the telescope tube 114, the vehicle body 121 may be positioned on top of the large plate girder 210. The vehicle body 121 is controlled to move on the top of the large plate girder 210 through the remote controller, so that the deformation of each point to be measured of the large plate girder 210 is measured, manual marking on the large plate girder 210 by a measurer is avoided, and the risk of the measurer is reduced.
As shown in fig. 7, in some embodiments, the marking member 122 is disposed on the top of the vehicle body 121, an end surface of the marking member 122 away from one end of the vehicle body 121 is a horizontal plane, and a boundary between the end of the marking member 122 away from the vehicle body 121 and the air is more obvious when viewed from the telescope tube 114, and the boundary is approximately a horizontal line, so as to facilitate adjustment of the telescope tube 114 until the sight axis coincides with the boundary.
With continued reference to fig. 7, in some embodiments, the shape of the marker 122 is a truncated cone, and the truncated cone shaped marker 122 has a better wind resistance, so that the marker 122 is not easily affected by wind to shake and is convenient to observe.
Referring again to fig. 7, in some embodiments, the car body 121 is provided with a light emitting member 123, and a light emitting direction of the light emitting member 123 is toward the marker 122. In some low light situations, such as cloudy days, or poor lighting conditions on the top of the boiler, the telescope column 114 is difficult to observe. Therefore, the arrangement of the light emitting member 123 can improve the brightness of the marker 122, thereby improving the adaptability of the large plate girder deflection measuring system to a low light environment.
As shown in fig. 7 and fig. 8, in some embodiments, the remote control cart 120 further includes wheels 124 and a magnetic member 125, the wheels 124 are rotatably disposed at the bottom of the cart body 121, and the magnetic member 125 is disposed at the bottom of the cart body 121, and the wheels 124 are further away from the top of the cart body 121 than the magnetic member 125 along a direction away from the bottom of the cart body 121. That is, when the remote-control car 120 is placed on the plate girder 210, there is a gap between the magnetic attraction piece 125 and the plate girder 210, so that the normal running of the vehicle is not affected. The magnetic attraction piece 125 has magnetic force, the magnetic attraction piece 125 can be an electromagnet or a permanent magnet, and when the magnetic force of the magnetic attraction piece 125 is large enough, the vehicle body 121 can be attracted to the bottom of the large plate beam 210 at intervals, that is, the vehicle body 121 can run in an inverted state, so as to measure the deformation amount of the point to be measured at the bottom of the large plate beam 210.
As shown in fig. 4 and 7, in some embodiments, the observation instrument 110 further includes a laser ranging member 115, the laser ranging member 115 is disposed on the sliding block 113, the remote control cart 120 further includes a laser reflecting plate 126, and the laser reflecting plate 126 is disposed on the cart body 121. The laser ranging unit 115 can measure the distance from the observation instrument 110 to the remote control cart 120, thereby precisely controlling the remote control cart 120 to move to the point to be measured.
In some embodiments, the remote-controlled cart 120 further includes a wind-up roller and a protection rope, wherein the wind-up roller is rotatably disposed on the cart body 121; the protection rope is wound on the winding roller, and the length of the protection rope can be adjusted through the winding roller. The protection rope has first end and second end, and first end fixed connection is in the wind-up roll, and the second end is connected in magnetic base 111. The remote control cart 120 is connected to the magnetic base 111 by a protection rope, thereby preventing the remote control cart 120 from falling to the ground when falling from the girder plate 210.
As shown in fig. 9, in some embodiments, the remote control cart 120 further includes two telescopic rods 127 and two limiting rods 128, the two telescopic rods 127 are respectively connected to the left and right sides of the cart body 121, and the two telescopic rods 127 are disposed along the width direction of the cart body 121. The two limit rods 128 are respectively connected with the two telescopic rods 127, and the two limit rods 128 are arranged along the height direction of the vehicle body 121. Before the remote control trolley 120 is used, the two telescopic rods 127 are adjusted to enable the distance between the two limiting rods 128 to be slightly larger than the width of the large plate beam 210, and when the trolley runs, the two limiting rods 128 limit the moving direction of the trolley body 121, so that the trolley body 121 is prevented from falling off the large plate beam 210.
The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms may be understood by those skilled in the art according to specific circumstances.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. The deflection measurement system for the large plate girder is characterized by comprising an observation instrument, wherein the observation instrument comprises:
a magnetic base;
the sliding rail is arranged on the magnetic base, and scale marks are arranged on the sliding rail;
the sliding block is slidably arranged on the sliding rail;
the telescope tube is arranged on the sliding block, and a collimation shaft is arranged on a lens of the telescope tube;
the retaining member, set up in the slider, the retaining member is used for fixing the slider.
2. The large panel beam deflection measuring system of claim 1 further comprising a remotely controlled cart, the remotely controlled cart comprising:
a vehicle body;
the marking piece is arranged on the vehicle body and used for providing an observation reference for the telescope tube;
and the remote controller is in communication connection with the vehicle body and is used for controlling the vehicle body to move.
3. The large plate beam deflection measuring system of claim 2 wherein the marker is disposed on the top of the car body, and the end surface of the marker away from the car body is horizontal.
4. The large panel beam deflection measuring system of claim 3 wherein said marker is frustoconical in shape.
5. The large panel beam deflection measuring system of claim 2 wherein the remotely controlled trolley further comprises:
the light-emitting piece, set up in car body, the light-emitting direction orientation of light-emitting piece the mark piece.
6. The large panel beam deflection measuring system of claim 2 wherein the remotely controlled trolley further comprises:
the wheels are rotatably arranged at the bottom of the vehicle body;
the piece is inhaled to magnetism, set up in the bottom of car body, along keeping away from the direction of car body bottom, the wheel compare in the piece is inhaled to magnetism keeps away from more the top of car body.
7. The large plate beam deflection measuring system of claim 2, wherein the observation instrument further comprises a laser ranging member disposed on the slider, and the remote control trolley further comprises a laser reflector disposed on the trolley body.
8. The large panel beam deflection measuring system of claim 2 wherein the remotely controlled trolley further comprises:
the winding roller is rotatably arranged on the trolley body;
the protection rope is wound on the winding roller, the length of the protection rope can be adjusted through the winding roller, the protection rope is provided with a first end and a second end, the first end is fixedly connected to the winding roller, and the second end is connected to the magnetic seat.
9. The large panel beam deflection measuring system of claim 2 wherein the remotely controlled trolley further comprises:
the two telescopic rods are respectively connected with the left side and the right side of the vehicle body and are arranged along the width direction of the vehicle body;
and the two limiting rods are respectively connected with the two telescopic rods and are arranged along the height direction of the vehicle body.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310860677.1A CN116893038A (en) | 2023-02-14 | 2023-02-14 | Large plate girder deflection measuring system |
| CN202310109336.0A CN115824539A (en) | 2023-02-14 | 2023-02-14 | Large plate girder deflection measuring system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310109336.0A CN115824539A (en) | 2023-02-14 | 2023-02-14 | Large plate girder deflection measuring system |
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| CN202310860677.1A Division CN116893038A (en) | 2023-02-14 | 2023-02-14 | Large plate girder deflection measuring system |
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| CN115824539A true CN115824539A (en) | 2023-03-21 |
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| CN202310109336.0A Pending CN115824539A (en) | 2023-02-14 | 2023-02-14 | Large plate girder deflection measuring system |
| CN202310860677.1A Pending CN116893038A (en) | 2023-02-14 | 2023-02-14 | Large plate girder deflection measuring system |
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| CN116893038A (en) | 2023-10-17 |
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