Verification device based on absolute expansion detector

Abstract

When the verification device based on the absolute expansion detector provided by the utility model is used, the absolute expansion detector and the precision length measuring tool are installed on the same side of the stop block, and the detection end of the absolute expansion detector and the measuring end of the precision length measuring tool are respectively abutted against the same side of the stop block. The position of the stop block is adjusted through the translation device, so that the detection value of the absolute expansion detector is zero, and the precision length measuring tool is also adjusted to zero. And the translation device is driven again to drive the stop block to do linear translation motion, and the stop block simultaneously drives the detection end of the absolute expansion detector and the measurement end of the precise length measurement tool to move synchronously. By reading the numerical value of the absolute expansion detector and comparing the numerical value with the numerical value of the precise length measuring tool, whether the numerical value error of the two is within the verification qualified range or not is confirmed, and if not, the absolute expansion detector is adjusted or replaced in time, so that the accuracy of measured data of the detector can be effectively ensured; and verification of the absolute expansion detector is realized.

Description

Technical Field

[0001] This utility model belongs to the field of detector calibration technology, and specifically relates to a calibration device based on an absolute expansion detector. Background Technology

[0002] During the operation of nuclear power plants, the absolute expansion parameters of the high- and intermediate-pressure cylinders of the steam turbine are crucial indicators for ensuring safe operation. A certain nuclear power plant uses the AE119 detector manufactured by Vibro-Meter of Switzerland to monitor the absolute expansion of the high- and intermediate-pressure cylinders. This device requires manual tripping to prevent equipment malfunction when the values ​​exceed alarm thresholds. However, this model of detector is rarely used in domestic thermal power plants, and its unique structure means the manufacturer has not provided dedicated calibration tools. Furthermore, other nuclear power plants and metrology institutes also lack corresponding calibration equipment, making calibration difficult in practical use.

[0003] Since the unit began commercial operation, due to the lack of suitable calibration tools, the calibration of this type of detector has been limited to rough numerical comparisons using a measuring tape. However, the measuring tape's accuracy is poor and cannot meet actual operational requirements, affecting the accuracy of the differential pressure parameters of the turbine's intermediate and high-pressure cylinders. This problem not only limits the operational reliability of the equipment but may also adversely affect the long-term safety and efficiency of the turbine.

[0004] In summary, the lack of a dedicated calibration tool for the AE119 detector in existing technologies results in insufficient calibration accuracy, affecting the accuracy of the differential pressure parameters of the turbine's intermediate and high-pressure cylinders. Therefore, developing an efficient and accurate calibration device to meet the calibration requirements of this detector model has become an urgent technical problem to be solved. Utility Model Content

[0005] The purpose of this invention is to provide a calibration device based on an absolute expansion detector, which can ensure the accuracy of the detector's measurement data and realize the calibration of the absolute expansion detector.

[0006] To solve the above-mentioned technical problems, this utility model provides a calibration device based on an absolute expansion detector, comprising:

[0007] A translation device, wherein the movable end of the translation device is provided with a stop block to drive the stop block to reciprocate along a straight line;

[0008] Precision length measuring tools are used to measure linear distance traveled.

[0009] The detection end of the absolute expansion detector and the measuring end of the precision length measuring tool are respectively abutted against the same side of the stop.

[0010] Optionally, in the above-mentioned absolute expansion detector-based calibration device, a base is further included, and the translation device, the absolute expansion detector and the fixed end of the precision length measuring tool are all mounted on the base.

[0011] Optionally, in the above-mentioned absolute expansion detector-based calibration device, the base comprises a base plate and first and second supports arranged on the base plate, the precision length measuring tool is arranged on the first support, and the absolute expansion detector is arranged on the second support.

[0012] Optionally, in the above-mentioned absolute expansion detector-based calibration device, the first support and the base plate are integrally formed.

[0013] Optionally, in the above-mentioned absolute expansion detector-based calibration device, an upper surface of the first support is provided with a mounting groove for embedding the precision length measuring tool.

[0014] Optionally, in the above-mentioned absolute expansion detector-based calibration device, the second support and the absolute expansion detector are connected through fasteners.

[0015] Optionally, in the above-mentioned absolute expansion detector-based calibration device, a strip-shaped groove is arranged on the second support, and a mounting hole is arranged on the base plate at a position opposite to the strip-shaped groove.

[0016] Optionally, in the above-mentioned absolute expansion detector-based calibration device, the precision length measuring tool is a dial gauge.

[0017] Optionally, in the above-mentioned absolute expansion detector-based calibration device, the translation device comprises a third support, a lead screw rotatably arranged on the third support, a sliding block threadedly connected with the lead screw, and a guide rod arranged in parallel with the lead screw, the sliding block is provided with the stopper, the guide rod is fixed to the third support, and the sliding block is slidingly connected to the guide rod.

[0018] Optionally, in the above-mentioned absolute expansion detector-based calibration device, the translation device further comprises a hand wheel arranged at an end of the lead screw.

[0019] Optionally, in the above-mentioned absolute expansion detector-based calibration device, the third support is a U-shaped support, and two ends of the lead screw and the guide rod are respectively connected with two ends of the U-shaped support.

[0020] Optionally, in the above-mentioned absolute expansion detector-based calibration device, a range of the precision length measuring tool is 0-100 mm, and an accuracy is 0.01 mm, and a range of the absolute expansion detector is 0-50 mm, and an accuracy is 1%.

[0021] The absolute expansion detector-based calibration device has the advantages that:

[0022] In use, the absolute expansion detector and the precision length measuring tool are installed on the same side of the stop block, and the detection end of the absolute expansion detector and the measuring end of the precision length measuring tool are respectively in abutment with the same side of the stop block, the position of the stop block is adjusted by the translation device, so that the detection value of the absolute expansion detector is zero, and the precision length measuring tool is also adjusted to zero. The translation device is driven again to drive the stop block to move linearly, and the stop block simultaneously drives the detection end of the absolute expansion detector and the measuring end of the precision length measuring tool to move synchronously. By comparing the values of the absolute expansion detector and the precision length measuring tool, it is confirmed whether the value error of the two is within the qualified range of verification, if not, the absolute expansion detector is adjusted or replaced in time, the above setting can effectively ensure the accuracy of the measurement data of the detector, and the verification of the absolute expansion detector is realized. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of the provided drawings.

[0024] Figure 1 It is a structural schematic view of the absolute expansion detector in the prior art;

[0025] Figures 2-3 It is a structural schematic view of the verification device of the absolute expansion detector provided by the embodiment of the present application from different perspectives;

[0026] Figure 4 It is a top view of Figure 2 ;

[0027] Figure 5 It is a structural schematic view of the base provided by the embodiment of the present application;

[0028] Figure 6 It is a structural schematic view of the precision length measuring tool provided by the embodiment of the present application;

[0029] Figure 7 It is a structural schematic view of the connection between the precision length measuring tool and the first support provided by the embodiment of the present application;

[0030] Figure 8 It is a structural schematic view of the translation device provided by the embodiment of the present application.

[0031] In the above figure:

[0032] 100-absolute expansion detector;

[0033] 210 - base; 211 - substrate; 212 - first support; 213 - second support; 220 - translation device; 221 - third support; 222 - screw; 223 - stop block; 224 - guide rod; 225 - hand wheel; 230 - precision length measuring tool. DETAILED DESCRIPTION

[0034] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary only, and are used only for explaining the present application, and cannot be understood as limiting the present application.

[0035] The core of the present application is to provide a kind of based on absolute expansion detector's check device, can effectively guarantee the accuracy of detector measurement data, realize the check of absolute expansion detector.

[0036] In order for those skilled in the art to better understand the technical solutions provided by the present application, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0037] Specifically, please refer to Figures 1-4 The check device based on the absolute expansion detector provided by the present application, wherein the absolute expansion detector 100 is taken as the check object, and the check device based on the absolute expansion detector mainly includes a translation device 220 and a precision length measuring tool 230.

[0038] The movable end of the translation device 220 is provided with a stop block 223, and the translation device 220 can drive the stop block 223 to move linearly and reciprocally.

[0039] The precision length measuring tool 230 is a general precision measuring tool for measuring length, specifically, it can be used to measure the linear movement distance of the stop block 223.

[0040] The detection end of the absolute expansion detector 100 and the measuring end of the precision length measuring tool 230 are respectively in abutment with the same side of the stop block 223.

[0041] The utility model provides a check device based on absolute expansion detector, when using, absolute expansion detector 100 and accurate length measuring tool 230 are installed on the same side of the stopper 223, and the detection end of absolute expansion detector 100 and the measuring end of accurate length measuring tool 230 are respectively in abutment with the same side of the stopper 223, the position of stopper 223 is adjusted through translation device 220, makes the detection value of absolute expansion detector 100 zero, and accurate length measuring tool 230 is also adjusted to zero.Driving translation device 220 drives stopper 223 to do linear translation motion, and simultaneously drives the detection end of absolute expansion detector 100 and the measuring end of accurate length measuring tool 230 to move synchronously.Through reading the value of absolute expansion detector 100 and the value of accurate length measuring tool 230 and comparing, confirm whether the value error of both is in the check qualified range, if unqualified, then in time adjustment or replacement absolute expansion detector 100, the above-mentioned setting can effectively guarantee the accuracy of the measuring data of the detector.

[0042] In order to facilitate the integration of each component of the check device, the present scheme further comprises a base 210, the fixed end of the translation device 220, the absolute expansion detector 100 and the accurate length measuring tool 230 are all installed on the base 210.

[0043] As shown in Figure 5 The base 210 comprises a substrate 211, a first bracket 212 and a second bracket 213 arranged on the substrate 211, the accurate length measuring tool 230 is arranged on the first bracket 212, and the absolute expansion detector 100 is arranged on the second bracket 213.

[0044] The first bracket 212 and the substrate 211 are integrally formed. By adjusting the detection end of the accurate length measuring tool 230, the detection end is in abutment with the stopper 223.

[0045] The upper surface of the first bracket 212 is provided with a mounting groove for embedding the accurate length measuring tool 230, so that the movement of the accurate length measuring tool 230 can be limited. When the accurate length measuring tool 230 adopts the structure as shown in Figures 6-7 The bottom of the accurate length measuring tool 230 is provided with a mounting protrusion, the mounting protrusion is provided with a bolt hole, the groove wall of the first bracket 212 is provided with a bolt hole corresponding to the bolt hole of the mounting protrusion, the accurate length measuring tool 230 and the first bracket 212 are connected through bolts, so that the stability of the installation of the accurate length measuring tool 230 on the first bracket 212 is realized. Of course, mounting holes corresponding to the screw holes of the first bracket 212 can also be provided on other positions of the accurate length measuring tool 230.

[0046] The second support 213 is connected with the absolute expansion detector 100 through fasteners. In order to facilitate the movement of the absolute expansion detector 100, a strip-shaped groove can also be formed on the second support 213, and a mounting hole is formed on the substrate 211 at a position opposite to the strip-shaped groove. After the relative positions of the second support 213 and the substrate 211 are adjusted, the second support 213 and the substrate 211 are fixed by penetrating the strip-shaped groove of the second support 213 and the mounting hole of the substrate 211 with a bolt.

[0047] The skilled in the art can understand that the above-mentioned various setting modes of the components of the base 210 can be freely combined and superimposed without conflict.

[0048] In specific embodiments, the precision length measuring tool 230 is a dial gauge. In order to ensure the accuracy of the measurement data of the absolute expansion detector 100, a calibration device for the high-pressure cylinder body expansion detector is independently designed and developed according to the device structure, and a dial gauge in the tool library of the power plant can be used as a standard gauge (the dial gauge can be a power plant periodical calibration device, which meets the value transfer requirements), thereby effectively ensuring the accuracy of the high-pressure cylinder expansion difference parameter during the calibration of the absolute expansion detector 100 during each overhaul.

[0049] In specific embodiments, as shown in Figure 8 The translation device 220 is equivalent to a ball screw mechanism, mainly including a third support 221, a screw rod 222, a sliding block and a guide rod 224. The screw rod 222 is rotatably arranged on the third support 221, the guide rod 224 is arranged in parallel with the screw rod 222 and is fixed on the third support 221, and the sliding block is threadedly connected with the screw rod 222 and is slidingly connected with the guide rod 224. A stop block 223 is arranged on the sliding block, and when the screw rod 222 rotates, the sliding block moves together with the stop block 223, thereby realizing the translation of the stop block 223.

[0050] In addition, the translation device 220 further includes a hand wheel 225 arranged at an end of the screw rod 222, and the screw rod 222 is driven to rotate by rotating the hand wheel 225. The hand wheel 225 converts the circular motion into the linear motion of the stop block 223, and the clockwise rotation of the hand wheel 225 realizes the forward motion, and the counterclockwise rotation of the hand wheel 225 realizes the return motion.

[0051] In order to realize the stability of the movement of the stop block 223, the third support 221 is a U-shaped support, and the two ends of the screw rod 222 and the guide rod 224 are connected with the two ends of the U-shaped support, respectively. The precision length measuring tool 230 and the absolute expansion detector 100 are raised by the first support 212 and the second support 213, so that the detection ends of the precision length measuring tool 230 and the absolute expansion detector 100 are in contact with the stop block 223.

[0052] When the range of the absolute expansion detector 100 is 0-50mm, the precision is 1%, and the output is 4-10mA signal, the corresponding precision length measuring tool 230, especially the dial gauge, has a range of 0-100mm and a precision of 0.01mm.

[0053] In actual operation, the absolute expansion detector 100 and the dial gauge are installed on the base 210, and the dial gauge is installed with the absolute expansion detector 100 to zero (the value of the dial gauge is set to 0mm from any natural number, and the dial gauge has a zero button), the stop block 223 is moved by rotating the hand wheel 225, the stop block 223 drives the dial gauge and the absolute expansion detector 100 to move together in the range of 0-50mm, and the values of the absolute expansion detector 100 and the dial gauge are compared to confirm whether the error is within the qualified range of verification. If the error exceeds the qualified range of verification, the absolute expansion detector 100 is adjusted or replaced in time. Until the absolute expansion detector 100 meets the qualified range of verification.

[0054] The verification device of the case can be designed as a reciprocating operation platform to meet the multi-point verification requirements of the probe of the absolute expansion detector 100.

[0055] In summary, the verification device based on the absolute expansion detector provided in the scheme realizes the independent verification function of the absolute expansion detector of the high-pressure cylinder of the steam turbine by designing a convenient and practical platform.

[0056] In the description of the present application, it should be understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element indicated must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0057] In the description of the present application, the meaning of multiple is more than two, and if the first and the second are described, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0058] As shown in the present application and claims, unless otherwise clearly indicated by context, "a," "an," and / or "the" can refer to both the singular and plural of such modifiers. Generally, the term "comprises" or "comprising" as used herein is intended to indicate an inclusion of a step or element prior to or with the process, method, article, or apparatus that comprises the step or element, but not to the exclusion of addition of yet another step or element. The term "consisting of" is intended to indicate an inclusion of a process, method, article, or apparatus that consists only of the recited steps or elements, and a limitation is that no other steps or elements can be added.

[0059] In the description of the embodiments of the present application, unless otherwise specified, " / " means or, for example, A / B can mean A or B; "and / or" in the present application is only a description of the relationship between the associated objects, which means that there can be three relationships, for example, A and / or B, which means that there are three cases of A alone, A and B together, and B alone. In addition, in the description of the embodiments of the present application, "multiple" means two or more than two.

[0060] In the description of the present application, unless otherwise expressly limited, the words such as setting, installing, connecting, etc. should be broadly understood, and those skilled in the art can reasonably determine the specific meaning of the above words in the present application according to the specific content of the technical solution.

[0061] The embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other.

[0062] The principle and implementation mode of the present application are described by using specific examples. The above description of the embodiments is only used to help understand the method and its core idea. It should be pointed out that for ordinary skilled in the art, without departing from the principle of the present application, some improvements and modifications can be made to the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A verification device based on an absolute expansion detector, characterized in that, include: Translation device (220), the movable end of which is provided with a stop (223) to drive the stop (223) to reciprocate along a straight line; A precision length measuring tool (230) for measuring linear distance traveled; The detection end of the absolute expansion detector (100) and the measuring end of the precision length measuring tool (230) abut against the same side of the stop (223).

2. The calibration device based on an absolute expansion detector according to claim 1, characterized in that, It also includes a base (210), on which the fixed ends of the translation device (220), the absolute expansion detector (100) and the precision length measuring tool (230) are all mounted.

3. The calibration device based on an absolute expansion detector according to claim 2, characterized in that, The base (210) includes a base plate (211) and a first bracket (212) and a second bracket (213) disposed on the base plate (211). The precision length measuring tool (230) is disposed on the first bracket (212), and the absolute expansion detector (100) is disposed on the second bracket (213).

4. The calibration device based on an absolute expansion detector according to claim 3, characterized in that, The first support (212) and the substrate (211) are integrally formed; And / or, the upper surface of the first bracket (212) is provided with a mounting groove for embedding the precision length measuring tool (230).

5. The calibration device based on an absolute expansion detector according to claim 3, characterized in that, The second bracket (213) is connected to the absolute expansion detector (100) by fasteners; And / or, the second bracket (213) has a strip groove, and the substrate (211) has a mounting hole at a position opposite to the strip groove.

6. The calibration device based on an absolute expansion detector according to claim 1, characterized in that, The precision length measuring tool (230) is a dial indicator.

7. The calibration device based on an absolute expansion detector according to claim 1, characterized in that, The translation device (220) includes a third support (221), a lead screw (222) rotatably mounted on the third support (221), a slider threadedly connected to the lead screw (222), and a guide rod (224) parallel to the lead screw (222). The slider is provided with a stop block (223), the guide rod (224) is fixed on the third support (221), and the slider is slidably connected to the guide rod (224).

8. The calibration device based on an absolute expansion detector according to claim 7, characterized in that, The translation device (220) also includes a handwheel (225), which is located at the end of the lead screw (222).

9. The calibration device based on an absolute expansion detector according to claim 7, characterized in that, The third bracket (221) is a U-shaped bracket, and the two ends of the lead screw (222) and the guide rod (224) are respectively connected to the two ends of the U-shaped bracket.

10. The calibration device based on an absolute expansion detector according to claim 1, characterized in that, The precision length measuring tool (230) has a measuring range of 0-100mm and an accuracy of 0.01mm, and the absolute expansion detector (100) has a measuring range of 0-50mm and an accuracy of 1%.

Images