CN213779936U - Electronic digital display large-range long-life creep expansion detection device for boiler heating surface - Google Patents
Electronic digital display large-range long-life creep expansion detection device for boiler heating surface Download PDFInfo
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- CN213779936U CN213779936U CN202022339302.5U CN202022339302U CN213779936U CN 213779936 U CN213779936 U CN 213779936U CN 202022339302 U CN202022339302 U CN 202022339302U CN 213779936 U CN213779936 U CN 213779936U
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Abstract
The utility model discloses an electron digital display is long-life boiler receives hot side wriggling and expands detection device on a large scale, including metal gauge head, arc blade, fixed axle, appearance bars sensing display, electron digital display screen and handle, the arc blade passes through fixed axle cross connection, and the arc blade is connected with appearance bars sensing display, and the metal gauge head is connected to the sense terminal of arc blade, and the handle is connected to the handheld end of arc blade, and appearance bars sensing display connects electron digital display screen, is provided with public english system shift key, start/shutdown/zero clearing key and fixed key on the appearance bars sensing display. The device can realize electronic digital display reading, and the arc-shaped large-size ruler body and the metal measuring head are of detachable structures, so that the service life of the device can be prolonged, and the detection precision is not reduced. The device is optimized in structure, saves the used materials and space of the device, is convenient to carry, assemble and disassemble, has stronger adaptability in field detection, and can be widely applied to abrasion-proof and explosion-proof work of boilers.
Description
Technical Field
The utility model relates to a detector, especially a detector that expands of electron digital display long-life boiler heating surface creep on a large scale are received to boiler heating surface. The creep expansion detection device is suitable for the creep expansion detection of the boiler heating surface, and can be widely applied to the abrasion-proof and explosion-proof detection of the boiler heating surface during the boiler maintenance period in the power industry.
Background
The boiler heating surface mainly refers to a boiler water wall tube, an economizer tube, a superheater tube and a reheater tube, is used as a main structural component in a boiler, runs in severe environment media such as high temperature, smoke, coal ash and the like for a long time, and can generate a series of changes of material organization and performance in the service process, wherein the changes relate to complex aging and failure mechanisms such as creep deformation, fatigue, corrosion and the like. The failure of the heating surface of the boiler is the result of the comprehensive effect of various factors such as materials, environmental media, temperature, stress and operation conditions, and is always the main reason for forced shutdown of the thermal power plant units at home and abroad. As the service time of the thermal power generating unit is prolonged, the parameters of the unit are improved, the capacity is increased, the failure accident of the heating surface of the boiler is in an ascending trend, the safe operation of the unit is seriously influenced, and huge economic loss is caused to a power generation enterprise. The leakage reasons of the heating surface of the boiler can be divided into overheating material aging, abrasion, welding quality, stress tension crack, material quality, corrosion, mechanical damage and the like, according to statistics, the leakage occupation ratio generated by the overheating material aging is the largest, the creep expansion detection is carried out on positions which are easy to age during maintenance except for strengthening wall temperature control in operation, and the leakage reasons are one of important contents for carrying out boiler abrasion-proof and explosion-proof work of power generation enterprises.
For a long time, the most common method for detecting the expansion thickness of the heating surface of the boiler is to use a vernier caliper for detection, because the number of the heating surfaces of the boiler is large, the range of measuring points is wide, the detection speed is low by using the vernier caliper, the labor intensity is high, the light ray in a hearth is poor, the reading of the vernier caliper is inconvenient, the caliper body is short, the vernier caliper can detect the heating surface with larger outer diameter by using the vernier caliper with the specification of 300mm or more, and meanwhile, the vernier caliper is difficult to detect the outer diameter of the closely arranged water-cooled wall pipes, which brings difficulty to the leakage prevention work of the heating surface of the boiler.
The creep expansion value is related to an actually measured outer diameter value and a nominal outer diameter value of a heating surface of the boiler, and is shown as the following formula:
creep value = (measured outer diameter value-nominal outer diameter value)/nominal outer diameter value
Referring to DL/T438-2016 metal technical supervision of thermal power plant, when the creep detection value of the heating surface of the boiler has the following conditions, the heating surface of the boiler should be replaced in time: the creep expansion of the outer diameter of the carbon steel pipe is more than 3.5 percent; the creep expansion of the outer diameter of the low alloy steel pipe is more than 2.5 percent; the creep expansion of the outer diameter of the T91 and T122 pipes is more than 1.2 percent; the creep expansion of the external diameter of the austenitic heat-resistant steel pipe is more than 4.5 percent.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the current slide caliper that utilizes to creep and swell and examine time measuring, unable direct display numerical value, be difficult to quick reading, the blade detects external diameter scope little, the blade is most advanced to take place wearing and tearing or warp the unable problem of use promptly after. The utility model provides a reasonable in design's electronic digital display is long-range boiler heating surface creep expansion detection device not only can realize the electronic digital display reading, has increased the blade moreover, and the blade is most advanced to be detachable construction, can prolong boiler heating surface creep expansion detection device's life, does not reduce simultaneously and detects the precision.
The utility model provides a technical scheme that above-mentioned problem adopted is: the utility model provides an electron digital display is long-range boiler heating surface creep expansion detection device which characterized in that: the measuring instrument comprises a metal measuring head, an arc-shaped ruler body, a fixing shaft, a capacitive grating sensing display, an electronic digital display screen and a handle, wherein the arc-shaped ruler body is connected with the capacitive grating sensing display in a cross mode through the fixing shaft, the arc-shaped ruler body is connected with the capacitive grating sensing display, the detecting end of the arc-shaped ruler body is connected with the metal measuring head, the handheld end of the arc-shaped ruler body is connected with the handle, the capacitive grating sensing display is connected with the electronic digital display screen, and the capacitive grating sensing display is provided with a metric and British system conversion key, a power-on/off/zero clearing key and a fixing key.
Further, the arc-shaped ruler bodies comprise two. The actual outer diameter of the heated surface pipe of the boiler is accurately detected by the two arc-shaped ruler bodies, an outer diameter detection value is displayed in an electronic digital display screen through a capacitive gate sensing display, and the creep expansion detection of the outer diameter of the heated surface pipe of the boiler can be conveniently, quickly and effectively realized.
Furthermore, the metal measuring head is detachably connected with the arc-shaped ruler body. The metal measuring head is made of high-hardness wear-resistant materials and is of a detachable structure, when the detection precision is influenced by abrasion of the metal measuring head after a large amount of detection, the whole ruler body does not need to be replaced, the service life of the creep and expansion detection device for the heating surface of the boiler can be prolonged, and the detection precision is not reduced.
Further, when in use, the metal measuring head is in contact with the boiler heating surface tube.
Compared with the prior art, the utility model, have following advantage and effect:
the utility model discloses configured grid sensing display, it is placed relatively by two sets of strip electrode groups and constitutes, and a set of grid that is moving, another a set of grid that is fixed, move the grid and realize the measurement of its displacement through electrostatic coupling with the fixed grid, the back will be direct display in the electron digital display screen.
The utility model discloses configured two arc blade, the size is longer than slide caliper, adjusts the boiler heating surface external diameter that different cross angle realized wider, the great degree of depth through the fixed axle and detects.
The utility model relates to a metal gauge head is detachable construction, and when detecting the precision in a large number of back metal gauge head wearing and tearing influences, need not to change whole blade, only change the metal gauge head and can prolong the boiler heating surface creep and swell detection device's life to do not reduce the detection precision.
The utility model has the advantages that the whole structure is compact, the device using material and space are saved, the carrying and the installation are convenient, and the adaptability is stronger in the field detection.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: the boiler heating surface comprises a boiler heating surface pipe 1, a metal measuring head 2, an arc-shaped ruler body 3, a fixed shaft 4, a capacitive grating sensing display 5, an electronic digital display screen 6, a metric and English system conversion key 7, a startup/shutdown/zero clearing key 8, a fixed key 9 and a handle 10.
Detailed Description
The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not intended to limit the present invention.
Examples are given.
Referring to fig. 1, in the present embodiment, an electronic digital display large-range long-life creep expansion detection device for a boiler heating surface includes a metal measuring head 2, an arc-shaped blade 3, a fixed shaft 4, a capacitive-gate sensing display 5, an electronic digital display screen 6 and a handle 10. Arc blade 3 includes two, two arc blades 3 pass through 4 cross connection of fixed axle, and arc blade 3 is connected with appearance bars sensing display 5, metal gauge head 2 is connected to the sense terminal of arc blade 3, metal gauge head 2 is detachable construction, during the use, metal gauge head 2 and boiler are heated the contact of face pipe 1, handle 10 is connected to the handheld end of arc blade 3, appearance bars sensing display 5 connects electron digital display 6, be provided with metric system shift key 7 on the appearance bars sensing display 5, start/shut down/zero clearing key 8 and fixed key 9.
The use steps are as follows:
1. the appearance and the interaction of each part are checked, and zero setting calibration of the device is carried out after determining that no factors influencing the detection characteristics exist. The device can be started by pressing the start/shutdown/zero clearing key 8 for a long time, the two metal measuring heads 2 are in close contact, and the zero clearing of the device can be realized by pressing the start/shutdown/zero clearing key 8 for a short time.
2. During the detection of vermicular distension, two metal measuring heads 2 are placed at the maximum outer diameter of the heated surface pipe 1 of the boiler through the handle 10, the maximum value of the actually measured outer diameter can be obtained by short pressing the fixing key 9, the data is recorded when the numerical value is stabilized on the electronic digital display screen 6, and then the outer diameter detection of the next position can be carried out by short pressing the fixing key 9 again.
3. Calculating the external diameter creep expansion value of the boiler heating surface pipe 1 by a formula creep expansion value = an actually measured external diameter value-a nominal external diameter value/a nominal external diameter value, and comparing the creep expansion detection limit values of the heating surfaces of the boilers of different materials given by DL/T438-2016 metal technical supervision regulations of thermal power plants to evaluate whether to replace the boiler heating surface pipe 1.
4. When the creep expansion value is questioned, the heated surface pipe 1 of the boiler can be detected for many times, comprehensive evaluation is carried out after data analysis, and the boiler can be shut down by pressing a start-up/shut-down/zero clearing key 8 for a long time after the detection is finished.
Can know through the above-mentioned description, the utility model discloses not only can realize the electron digital display reading, increased the blade moreover, the blade is most advanced to be detachable construction, but extension fixture's life does not reduce simultaneously and detects the precision.
Those not described in detail in this specification are well within the skill of the art.
In addition, it should be noted that the above contents described in the present specification are only illustrations of the structure of the present invention. All equivalent changes made according to the structure, characteristics and principle of the utility model are included in the protection scope of the utility model. Various modifications, additions and substitutions by those skilled in the art may be made to the described embodiments without departing from the scope of the invention as defined in the accompanying claims.
Claims (4)
1. The utility model provides an electron digital display is long-range boiler heating surface creep expansion detection device which characterized in that: including metal gauge head (2), arc blade (3), fixed axle (4), capacitance grid sensing display (5), electron digital display screen (6) and handle (10), arc blade (3) are through fixed axle (4) cross connection, and arc blade (3) are connected with capacitance grid sensing display (5), metal gauge head (2) are connected to the sense terminal of arc blade (3), handle (10) are connected to the handheld end of arc blade (3), electron digital display screen (6) are connected to capacitance grid sensing display (5), be provided with metric system conversion key (7), start/shutdown/zero clearing key (8) and fixed key (9) on capacitance grid sensing display (5).
2. The device for detecting the creep expansion of the heating surface of the electronic digital display long-range long-life boiler as claimed in claim 1, is characterized in that: the two arc-shaped ruler bodies (3) are included.
3. The device for detecting the creep expansion of the heating surface of the electronic digital display long-range long-life boiler as claimed in claim 1, is characterized in that: the metal measuring head (2) is detachably connected with the arc-shaped ruler body (3).
4. The device for detecting the creep expansion of the heating surface of the electronic digital display long-range long-life boiler as claimed in claim 1, is characterized in that: when the metal measuring head is used, the metal measuring head (2) is in contact with the boiler heating surface pipe (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022339302.5U CN213779936U (en) | 2020-10-20 | 2020-10-20 | Electronic digital display large-range long-life creep expansion detection device for boiler heating surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022339302.5U CN213779936U (en) | 2020-10-20 | 2020-10-20 | Electronic digital display large-range long-life creep expansion detection device for boiler heating surface |
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| Publication Number | Publication Date |
|---|---|
| CN213779936U true CN213779936U (en) | 2021-07-23 |
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| CN202022339302.5U Active CN213779936U (en) | 2020-10-20 | 2020-10-20 | Electronic digital display large-range long-life creep expansion detection device for boiler heating surface |
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| CN (1) | CN213779936U (en) |
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- 2020-10-20 CN CN202022339302.5U patent/CN213779936U/en active Active
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