CN219416134U - Pull-wire type three-way displacement sensor and multi-position displacement detection device - Google Patents
Pull-wire type three-way displacement sensor and multi-position displacement detection device Download PDFInfo
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- CN219416134U CN219416134U CN202320402691.2U CN202320402691U CN219416134U CN 219416134 U CN219416134 U CN 219416134U CN 202320402691 U CN202320402691 U CN 202320402691U CN 219416134 U CN219416134 U CN 219416134U
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Abstract
The utility model aims to provide a stay wire type three-way displacement sensor and a multi-position displacement detection device, which relate to the technical field of displacement sensors, wherein the stay wire type three-way displacement sensor comprises a plurality of stay wire type displacement sensors, a wire collecting sub and an integrated circuit board, the number of the stay wire type displacement sensors is not less than three, the positions of the plurality of stay wire type displacement sensors are fixed, the stay wire type displacement sensors are in communication connection with the integrated circuit board, the stay wires of the plurality of stay wire type displacement sensors are led out and then are fixed on the wire collecting sub, the wire collecting sub is fixedly arranged at a monitoring point, the stay wire type displacement sensors are used for transmitting the pull-out length value of the stay wire to the integrated circuit board, and the integrated circuit board calculates the space coordinate value of a movable end of the stay wire according to the space coordinate of a pull-out end of each stay wire and the pull-out length of the stay wire. The scheme provided by the utility model not only ensures that the boiler expansion amount is accurately measured in real time, but also is convenient for field installation.
Description
Technical Field
The utility model relates to the technical field of displacement sensors, in particular to a stay wire type three-way displacement sensor and a multi-position displacement detection device.
Background
Along with the flexible peak regulation requirement of the thermal power generating unit, the severe test of the safety of the boiler is met. The peak shaving process is the process of changing the internal thermal physical characteristics and thermal stress distribution of the boiler. When the deformation of the boiler exceeds the bearing capacity of the components, the boiler is damaged and broken, and even an unplanned furnace is stopped, so that the safe operation of a power station is seriously threatened.
The boiler expansion indicator monitors changes in geometry of the pressure bearing device or component when heated and pressurized, and if such changes are outside of the design specification, the boiler expansion indicator indicates a problem with the operation of the boiler. The expansion monitoring of the boiler can timely find the deformation of the evaporation equipment caused by improper ignition, temperature rise and pressure rise, and prevent cracking, leakage and the like of uneven expansion.
At present, most of the common boiler expansion indicators are designed by a pointer and a scale plate, and are called mechanical boiler expansion indicators. The pointer of the mechanical expansion indicator is fixed on the boiler, the scale plate is carved with field grid scales taking millimeter as a unit, the scale plate is fixed on the boiler steel frame, and the pointer is perpendicular to the scale plate. Because the boiler steel frame is relatively static, and the boiler expands and contracts when the temperature changes, the amount of relative displacement between the pointer and the scale plate is the expansion amount of the boiler. During start-up, shut-down and heavy load operation of the boiler, it is necessary for the inspector to check the scale value indicated by the pointer of the mechanical boiler expansion indicator on site at each sensor of the boiler. And because the expansion of the boiler often has a third expansion direction, the boiler moves in the axial direction of the pointer of the mechanical expansion indicator, and in order to avoid the pointer from being contacted with the scale plate, a certain safety distance needs to be kept between the pointer and the scale plate, and the distance depends on the maximum expansion amount of the boiler in the axial direction of the pointer. This safe distance reduces the accuracy and precision of the readings of the indicator. In order to improve the precision and reduce the safety distance, the scale plate is horizontally arranged, and the pointer is changed into a vertically telescopic pointer. However, the scale of the scale plate is millimeter level, the top end area of the pointer is larger than 1 millimeter, and the telescopic design of the pointer makes it more difficult to ensure the precision requirement of 1 millimeter after the pointer stretches. The error of the mechanical boiler three-way expansion indicator is great.
In addition, as the boiler body volume increases, expansion measuring points are more and more, the distance between each point is far, the manual inspection and recording accuracy and timeliness are poor, the accurate analysis of boiler expansion data and the discovery of hidden expansion hazards are not facilitated, and the dynamic expansion condition of the boiler cannot be monitored and recorded in real time. With the real-time monitoring of the expansion amount of the boiler and the digital sensor of the expansion amount of the boiler appear in the market.
There is a sensor for calculating three-way displacement based on a linear displacement and inclination of displacement vector, the sensor has high requirement on installation position, the sensor must be installed vertically, the stretching total length of the displacement sensor is 2 times of the measuring range, and the occupied space is large.
The three-way displacement sensor based on the laser range finder has the advantages that the size of a laser receiving panel of the sensor is increased along with the increase of the measuring range, and the occupied space is larger. Light sensing instruments are always affected by ambient temperature, so that the light sensing instruments are not suitable for occasions with changeable temperatures.
Disclosure of Invention
The utility model aims to provide a stay wire type three-way displacement sensor and a multi-position displacement detection device, which are used for solving the problems of the prior art, ensuring that the expansion amount of a boiler is accurately measured in real time and facilitating the on-site installation.
In order to achieve the above object, the present utility model provides the following solutions:
the utility model provides a stay wire type three-way displacement sensor which comprises a plurality of stay wire type displacement sensors, a wire collecting sub-and an integrated circuit board, wherein the number of the stay wire type displacement sensors is not less than three, the positions of the plurality of stay wire type displacement sensors are fixed, the stay wire type displacement sensors are in communication connection with the integrated circuit board, stay wires of the plurality of stay wire type displacement sensors are led out and then are fixed on the wire collecting sub-respectively, the wire collecting sub-is used for being fixedly arranged at a monitoring point, the stay wire type displacement sensors are used for transmitting the pull-out length value of the stay wire to the integrated circuit board, and the integrated circuit board calculates the space coordinate value of the movable end of the stay wire according to the space coordinate of the pull-out wire end of each stay wire and the pull-out length of the stay wire.
Preferably, three pull-wire displacement sensors are provided.
Preferably, the integrated circuit board also comprises a shell, the shell is fixedly arranged, the stay wire type displacement sensor is fixedly arranged in the shell, a plurality of wire outlet holes are formed in the bottom of the shell, the movable ends of the stay wires are led out from the wire outlet holes, one wire outlet hole corresponds to one stay wire, the wire outlet holes are all located on the same plane, the integrated circuit board calculates the space coordinate value of the movable ends of the stay wires according to the space coordinate of the wire outlet holes and the pull-out length of the stay wires, and the pull-out length of the stay wires is the length of the stay wires between the wire outlet holes and the movable ends of the stay wires.
Preferably, the integrated circuit board comprises a singlechip and a communication module, the singlechip can calculate the space coordinate value of the movable end of the stay wire according to the space coordinate of the wire outlet end of each stay wire and the pull-out length of the stay wire, and the communication module is used for carrying out information interaction with external equipment.
Preferably, three wire outlet holes are arranged, and the wire outlet holes are connected to form an isosceles right triangle.
The utility model also provides a multi-position displacement detection device which comprises a plurality of stay wire type three-way displacement sensors, wherein one stay wire type three-way displacement sensor corresponds to one detection point.
Compared with the prior art, the utility model has the following technical effects:
the stay wire type three-way displacement sensor provided by the utility model can continuously measure the expansion displacement of the boiler in three directions, and has physical contact with tested equipment, so that the influence of environmental factors on a measurement result is reduced, and the stay wire type displacement sensor can perform high-precision measurement, thereby improving the accuracy of the measurement result; the distance between the stay wire type displacement sensor and the collector can be large or small, and the adaptability to the selection of the monitoring points and the datum points is good.
In addition, the communication module can also be used for carrying out information interaction with external equipment, so that the displacement of the monitoring point can be monitored in real time.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed 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 utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of three-dimensional coordinate value calculation of a concentrator;
FIG. 2 is a diagram showing the installation effect of the pull-wire type three-way displacement sensor according to the first embodiment;
FIG. 3 is a diagram showing a structure of a pull-wire type three-way displacement sensor according to the first embodiment;
FIG. 4 is a block diagram of the integrated circuit board of FIG. 3;
in the figure: 1-a boiler steel frame beam; 2-fixing seats; 3-a housing; 4-stay wire type displacement sensor; a 5-integrated circuit board; 6-wire outlet holes; 7-pulling wires; 8-line concentration; 9-swelling of the monitored object.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The utility model aims to provide a stay wire type three-way displacement sensor and a multi-position displacement detection device, which are used for solving the problems of the prior art, ensuring that the expansion amount of a boiler is accurately measured in real time and facilitating the on-site installation.
In order that the above-recited objects, features and advantages of the present utility model will become more readily apparent, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description.
Example 1
The embodiment provides a stay wire type three-way displacement sensor, as shown in fig. 2 and 3, which comprises a plurality of stay wire type displacement sensors 4, a wire collecting sub 8 and an integrated circuit board 5, wherein the number of the stay wire type displacement sensors 4 is not less than three, the positions of the plurality of stay wire type displacement sensors 4 are fixed, the stay wire type displacement sensors 4 are in communication connection with the integrated circuit board 5, stay wires 7 of the plurality of stay wire type displacement sensors 4 are led out and then are fixed on the wire collecting sub 8, the wire collecting sub 8 is used for fixing the monitoring point of an expansion monitoring object 9, the specific fixing mode can be welding, when the monitoring point moves in a three-dimensional mode, the wire collecting sub 8 moves along with the movement of the stay wires 7 of the plurality of stay wire type displacement sensors 4, the stay wire type displacement sensors 4 sense the change of the lengths of the stay wires 7, the stay wire type displacement sensors 4 are used for transmitting the pull-out length values of the stay wires 7 to the integrated circuit board 5, and the integrated circuit board 5 calculates the space coordinate values of the movable ends of the stay wires 7 according to the space coordinates of the pull-out of each stay wire 7.
The stay wire type three-way displacement sensor provided by the embodiment can continuously measure the expansion displacement amounts of the boiler in three directions, physical contact is arranged between the stay wire type displacement sensor 4 and tested equipment, the influence of environmental factors on a measurement result is reduced, and the stay wire type displacement sensor 4 can perform high-precision measurement, so that the accuracy of the measurement result can be improved; the distance between the stay wire type displacement sensor 4 and the collector 8 can be large or small, and the adaptability to the selection of monitoring points and datum points is good.
The embodiment has the advantages of simple structure, contact measurement, convenient installation, no limitation of installation angle and small influence of the increase of measurement range on the size of the sensor. The installation space can be large or small, and the adaptability to the selection of the monitoring points and the datum points is good.
The pull-wire displacement sensor 4 used in the embodiment has the precision as high as 0.05 percent FS and the protection level of IP65, so the measurement precision of the utility model is better than 1mm, and the protection level is not lower than IP65.
In a specific embodiment, the three stay wire type displacement sensors 4 are arranged, the three stay wire type displacement sensors 4 are fixedly arranged in a shell 3, three wire outlet holes 6 are arranged at the bottom of the shell 3, movable ends of the stay wires 7 are led out from the wire outlet holes 6, one wire outlet hole 6 corresponds to one stay wire 7, the three wire outlet holes 6 are all located on the same plane, the three wire outlet holes 6 are connected to form an isosceles right triangle, a space coordinate system is established by taking the right-angle vertexes of the isosceles right triangle as reference points, the integrated circuit board 5 calculates the space coordinate value of the movable ends of the stay wires 7 according to the space coordinate of the wire outlet holes 6 and the pull-out length of the stay wires 7, and the pull-out length of the stay wires 7 is the length of the stay wires 7 between the wire outlet holes 6 and the movable ends of the stay wires 7.
The shell 3 can be in a right triangle shape, when in manufacture, an isosceles right triangle is drawn on the bottom surface of the shell 3, small holes are formed at three vertexes of the triangle, the small holes are the wire outlet holes 6, and the stay wires 7 are led out from the small holes.
In another specific embodiment, as shown in fig. 4, the integrated circuit board 5 includes a single chip microcomputer and a communication module, the communication module adopts a 485 communication module, the single chip microcomputer can calculate the space coordinate value of the movable end of the stay wire 7 according to the space coordinate of the stay wire outlet end of each stay wire 7 and the pull-out length of the stay wire 7, and the communication module is used for carrying out information interaction with external equipment, so that displacement of a monitoring point is monitored in real time. Specifically, the external equipment is a boiler DCS system, the DCS and the intelligent control terminal send reading and control instructions to the intelligent control terminal in a communication mode, and the intelligent control terminal returns a controlled result to the DCS.
The integrated circuit board 5 further comprises a power supply module, the power supply module can supply power to the whole device, and the singlechip, the communication module and the power supply module are arranged in the shell 3; the data line and the power line of the power supply module are led out of the shell 3 through sealing. The singlechip and the three stay wire type displacement sensors 4 are connected through three groups of digital ports (IO ports) of the chip.
The housing 3 is fixed as follows: the shell 3 is fixed on a fixed seat 2, the fixed seat 2 is fixed on the boiler steel frame beam 1 by bolts or welding, and the fixed seat 2 can be plate-shaped.
Monitoring principle:
when the expansion monitoring point moves in the three-dimensional space, the wire collecting sub 8 is driven to move, the wire drawing 7 of the three wire drawing type displacement sensors 4 is stretched or contracted, the wire drawing type displacement sensors 4 send data signals to the single chip microcomputer on the integrated circuit board 5, and the single chip microcomputer calculates and outputs the result: three-way coordinate values of a line concentrator 8 taking one line outlet 6 as a reference point. And finally, outputting the signal to other equipment from a 485 communication cable through a communication module on the integrated circuit board 5.
The three-way coordinate value of the concentrator 8 is calculated according to the following principle:
ΔAOB in FIG. 1 is an isosceles right triangle, and ΔAOB is a right angle. The line segment DC is on the plane of the delta AOD and is always perpendicular to the AO edge of the delta AOD along with the movement of the point D. The line segment DE is on the plane of DeltaBOD and is always perpendicular to the BO side of DeltaBOD along with the movement of the point D. Point H is the perpendicular to the plane in which point D lies.
Points a, O, and B in fig. 1 correspond to the wire outlet holes 6 in fig. 2; point D in fig. 1 corresponds to hub 8 in fig. 2; line segments DA, DO, DB in FIG. 1 correspond to the pull-wire 7 in FIG. 2;
the values of the line segments HC, HE and HD can be obtained through the characteristic formulas and trigonometric functions of the triangles, namely the result of the output outwards after the calculation of the singlechip of the integrated circuit board 5 in fig. 2, namely the values in the three axial directions. The calculation method is a basic geometric operation method.
Example two
The embodiment provides a multi-point displacement detection device, which comprises a plurality of stay wire type three-way displacement sensors in an embodiment, wherein one stay wire type three-way displacement sensor corresponds to one detection point, so that a plurality of monitoring points are monitored in real time.
The principles and embodiments of the present utility model have been described in detail with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present utility model; also, it is within the scope of the present utility model to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the utility model.
Claims (6)
1. A stay wire type three-way displacement sensor is characterized in that: the wire-pulling type displacement sensor comprises a plurality of wire-pulling type displacement sensors, a wire-collecting sub-and an integrated circuit board, wherein the number of the wire-pulling type displacement sensors is not less than three, the positions of the plurality of wire-pulling type displacement sensors are fixed, the wire-pulling type displacement sensors are in communication connection with the integrated circuit board, the plurality of wire-pulling type displacement sensors are all fixed on the wire-collecting sub-after being pulled out, the wire-collecting sub-is fixedly arranged at a monitoring point, the wire-pulling type displacement sensors are used for transmitting the pull-out length value of the wire to the integrated circuit board, and the integrated circuit board calculates the space coordinate value of the movable end of the wire according to the space coordinate of the pull-out end of each wire and the pull-out length of the wire.
2. The pull-wire three-way displacement sensor of claim 1, wherein: three stay wire type displacement sensors are arranged.
3. The pull-wire three-way displacement sensor of claim 1, wherein: the integrated circuit board calculates the space coordinate value of the movable end of the stay wire according to the space coordinate of the wire outlet hole and the pull-out length of the stay wire, wherein the pull-out length of the stay wire is the length of the stay wire between the wire outlet hole and the movable end of the stay wire.
4. The pull-wire three-way displacement sensor of claim 1, wherein: the integrated circuit board comprises a singlechip and a communication module, the singlechip can calculate the space coordinate value of the movable end of the stay wire according to the space coordinate of the wire outlet end of each stay wire and the pull-out length of the stay wire, and the communication module is used for carrying out information interaction with external equipment.
5. A pull-wire three-way displacement sensor according to claim 3, wherein: three wire outlet holes are formed, and the wire outlet holes are connected to form an isosceles right triangle.
6. A multi-point displacement detection device, characterized in that: comprising a plurality of the pull-wire type three-way displacement sensors according to any one of claims 1 to 5, one of the pull-wire type three-way displacement sensors corresponding to one detection point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320402691.2U CN219416134U (en) | 2023-03-06 | 2023-03-06 | Pull-wire type three-way displacement sensor and multi-position displacement detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320402691.2U CN219416134U (en) | 2023-03-06 | 2023-03-06 | Pull-wire type three-way displacement sensor and multi-position displacement detection device |
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| Publication Number | Publication Date |
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| CN219416134U true CN219416134U (en) | 2023-07-25 |
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| CN202320402691.2U Active CN219416134U (en) | 2023-03-06 | 2023-03-06 | Pull-wire type three-way displacement sensor and multi-position displacement detection device |
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| CN (1) | CN219416134U (en) |
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- 2023-03-06 CN CN202320402691.2U patent/CN219416134U/en active Active
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