Horizontal plane height difference measuring tool
By designing a horizontal plane height difference measurement tool for including a reference block and a dial gauge, the problems of insufficient height difference measurement accuracy and difficulty in level detection in the prior art are solved, and higher measurement accuracy and reliability are achieved.
Patent Information
- Application Number
- CN202420621982.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-28
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-03-28
AI Technical Summary
When measuring the height difference between the static vane holding ring and the inner cylinder, the prior art has problems such as the influence of measurement position, insufficient measurement accuracy and inability to judge the level of the cylinder plane, especially when the static vane holding ring is far away from the inner cylinder plane.
A horizontal plane height difference measurement tool is designed, including a reference block and a dial meter. By placing the reference block on the cylinder plane, the dial meter side rod comes into contact with the cylinder plane, the initial reading is read, and then moving the reference block makes the dial meter side rod come into contact with the static vane holding ring, and the terminated reading is read. The difference between the two readings is the height difference, and the horizontality of the cylinder plane is detected by a level meter.
The accuracy and reliability of height difference measurement are improved, especially when the distance between the static vane holder ring and the inner cylinder is large, the measurement accuracy is ensured, and the measurement accuracy is improved through level detection.
Smart Images
Figure CN223021133U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a measuring tool for the height difference of horizontal planes, which is used for accurately measuring the height difference between two horizontal planes with similar heights. Background Technique
[0002] A steam turbine includes a cylinder, a diaphragm, a nozzle, a shaft seal, a bearing, a rotor, etc. The cylinder of the steam turbine includes an outer cylinder and an inner cylinder. A stationary blade carrier ring is provided between the rotor and the inner cylinder. During the overhaul and installation process of the steam turbine, it is necessary to level the inner cylinder first, and then measure the height difference between the stationary blade carrier ring and the inner cylinder. In the current technology, a depth vernier caliper is mostly used to measure the height difference between the stationary blade carrier ring and the inner cylinder. Under normal circumstances, the depth vernier caliper can meet the measurement requirements, but in special cases, there are problems such as being affected by the measurement position and insufficient measurement accuracy. For example, when the distance between the stationary blade carrier ring and the inner cylinder plane is far, the depth vernier caliper cannot effectively contact the two planes at the same time, and the reliability of the measurement is not high; or when the leveling error of the cylinder is large and the cylinder plane does not meet the flatness requirement, the depth vernier caliper cannot judge the flatness of the cylinder plane, which will also affect the measurement accuracy. Therefore, it is necessary to design a measuring tool to make up for the above disadvantages of the traditional measurement method. Content of the Utility Model
[0003] The measuring tool for the height difference of horizontal planes provided by the utility model, when measuring, first place the reference gauge block on the cylinder plane, make the free end of the side rod of the micrometer contact with the cylinder plane, read the reading of the micrometer at this time, then move the reference gauge block on the cylinder plane to make the side rod of the micrometer move to contact with the stationary blade carrier ring, and read the reading of the micrometer at this time. The difference between the two readings of the micrometer is the height difference between the cylinder plane and the stationary blade carrier ring. The reference gauge block is on the cylinder plane both times during the two measurements, and the height remains unchanged, ensuring the accuracy of the measurement, improving the reliability of the height difference measurement when the distance between the cylinder plane and the stationary blade carrier ring is large, and improving the practicability of the measuring tool; a spirit level is set on the reference gauge block to detect the flatness of the cylinder plane, improving the accuracy of the measurement.
[0004] To achieve the above object, the technical solution adopted by the utility model is:
[0005] A measuring tool for the height difference of horizontal planes, characterized in that: it includes a reference gauge block with a bottom surface as a reference plane and a micrometer. The micrometer is clamped at the front end of the reference gauge block and is arranged vertically. The free end of the side rod of the micrometer is lower than the bottom surface of the reference gauge block.
[0006] Preferably, a convex block integrally formed and extending forward is provided at the front end of the reference gauge block. The thickness of the convex block is less than the thickness of the reference gauge block. An installation hole with an axis perpendicular to the bottom surface of the reference gauge block is opened on the convex block, and the side rod shaft sleeve of the micrometer is inserted into the installation hole with clearance fit.
[0007] Preferably, threaded clamping holes are formed in the bump. The threaded clamping holes are symmetrically arranged on the left and right sides of the mounting hole and communicate with the mounting hole. Clamping bolts are screwed into the threaded clamping holes, and the inner ends of the clamping bolts contact the side rod bushing of the dial indicator, clamping the side rod bushing of the dial indicator between the two clamping bolts.
[0008] Preferably, a level is provided on the reference gauge and is parallel to the bottom surface of the reference gauge.
[0009] Preferably, a storage flat plate parallel to the bottom surface of the reference gauge is provided on the side surface of the reference gauge. Both sides of the storage flat plate are provided with side plates vertically arranged and having an L-shaped cross section. The level is placed on the storage flat plate and contacts the side plates.
[0010] Preferably, the reference gauge is in the shape of a cuboid, and the surface roughness of the bottom surface of the reference gauge is less than 6.3 μm.
[0011] The beneficial effects of the present utility model are as follows:
[0012] In the horizontal plane height difference measuring tooling of the present utility model, the bottom surface of the reference gauge is the reference plane. During measurement, first place the reference gauge on the cylinder plane. The free end of the side rod of the dial indicator will contact the cylinder plane. Read the reading of the dial indicator at this time. Then move the reference gauge on the cylinder plane so that the side rod of the dial indicator moves to contact the stationary blade carrier ring. Read the reading of the dial indicator at this time. The difference between the two readings of the dial indicator is the height difference between the cylinder plane and the stationary blade carrier ring. When the distance between the cylinder plane and the stationary blade is relatively large, by moving the reference gauge on the cylinder plane, the dial indicator contacts the cylinder plane and the stationary blade carrier ring successively. The reference gauge is on the cylinder plane during both measurements, and the height remains unchanged, ensuring the accuracy of the measurement, improving the reliability of the height difference measurement between the cylinder plane and the stationary blade carrier ring when the distance is relatively large, and improving the practicality of the tooling.
[0013] A level is provided on the reference gauge. When the reference gauge is placed on the cylinder plane, the levelness of the cylinder plane is detected by the level. When the levelness is unqualified, first level the cylinder plane until the levelness of the cylinder plane detected by the level is qualified, and then measure the height difference between the cylinder plane and the stationary blade carrier ring, improving the accuracy of the measurement. Description of the Drawings
[0014] Figure 1 It is a schematic diagram of the horizontal plane height difference measuring tooling in the specific implementation manner.
[0015] Figure 2 It is a top view of the reference gauge. Specific Implementation Manner
[0016] The following Figures 1-2 will describe the embodiments of the present utility model in detail.
[0017] Horizontal plane height difference measuring tooling, characterized in that: it includes a reference gauge block 1 with a bottom surface as a reference plane and a micrometer 2. The micrometer 2 is clamped at the front end of the reference gauge block 1 and is arranged vertically. The free end of the side rod of the micrometer 2 is lower than the bottom surface of the reference gauge block 1.
[0018] In the above-mentioned horizontal plane height difference measuring tooling, the bottom surface of the reference gauge block 1 is the reference plane. During measurement, first place the reference gauge block 1 on the cylinder plane. Since the free end of the side rod of the micrometer 2 is lower than the bottom surface of the reference gauge block 1, the free end of the side rod of the micrometer 2 will contact the cylinder plane. Read the reading of the micrometer at this time, and then move the reference gauge block 1 on the cylinder plane so that the side rod of the micrometer 2 moves to contact the stationary blade carrier ring. Read the reading of the micrometer at this time. The difference between the two micrometer readings is the height difference between the cylinder plane and the stationary blade carrier ring. When the distance between the cylinder plane and the stationary blade is relatively large, by moving the reference gauge block on the cylinder plane, the micrometer contacts the cylinder plane and the stationary blade carrier ring successively. The reference gauge block is on the cylinder plane during both measurements, and the height remains unchanged, ensuring the accuracy of the measurement, improving the reliability of measuring the height difference between the cylinder plane and the stationary blade carrier ring when the distance between them is relatively large, and improving the practicality of the tooling.
[0019] Wherein, a convex block 3 integrally formed and protruding forward is provided at the front end of the reference gauge block 1. The thickness of the convex block 3 is less than the thickness of the reference gauge block 1. An installation hole 31 with an axis perpendicular to the bottom surface of the reference gauge block 1 is opened on the convex block 3. The side rod bushing 21 of the micrometer 2 is inserted into the installation hole 31 with a clearance fit. When the reference gauge block 1 is placed on the cylinder plane, the axis of the installation hole 31 is arranged vertically. The side rod bushing 21 of the micrometer 2 is inserted into the installation hole 31 in a matching manner, so that the micrometer is arranged vertically, and the free end of the side rod 22 extending out of the side rod bushing 21 contacts the cylinder plane.
[0020] Wherein, threaded clamping holes 32 are opened on the convex block 3. The threaded clamping holes 32 are symmetrically arranged on the left and right sides of the installation hole 31 and communicate with the installation hole 31. Clamping bolts 33 are screwed into the threaded clamping holes 32. The inner ends of the clamping bolts 33 contact the side rod bushing 21 of the micrometer 2, and the side rod bushing 21 of the micrometer 2 is clamped between the two clamping bolts 33. Threaded clamping holes 32 are opened on both sides of the installation hole 31 and clamping bolts 33 are screwed in, clamping the side rod bushing 21 of the micrometer 2 between the two clamping bolts 33. The clamping of the clamping bolts 33 prevents the inclination of the side rod bushing of the micrometer 2 in the installation hole 31, ensuring that the side rod bushing of the micrometer is arranged vertically without inclination, and improving the accuracy of the measurement.
[0021] Among them, a level 4 parallel to the bottom surface of the reference gauge block 1 is arranged on the reference gauge block 1. By arranging the level 4 on the reference gauge block 1, when the reference gauge block 1 is placed on the cylinder plane, the levelness of the cylinder plane can be detected by the level 4. When the levelness is unqualified, the cylinder plane is first leveled until the levelness of the cylinder plane detected by the level 4 is qualified, and then the height difference between the cylinder plane and the stationary blade retaining ring is measured, improving the measurement accuracy. In actual structure, a bubble level can be selected, and whether the levelness of the cylinder plane is qualified can be quickly detected by observing the position of the bubble.
[0022] Among them, a storage flat plate 5 parallel to the bottom surface of the reference gauge block 1 is arranged on the side surface of the reference gauge block 1. Both sides of the storage flat plate 5 are provided with side plates 6 arranged vertically and having an L-shaped cross-section. The level 4 is placed on the storage flat plate 5 and contacts the side plates 6. The level 4 is restricted by the side plates 6 and will not fall off the storage flat plate 5. The storage flat plate 5 is parallel to the bottom surface of the reference gauge block 1. When the level 4 is placed on the storage flat plate 5, it is parallel to the bottom surface of the reference gauge block 1. When the reference gauge block 1 is placed on the cylinder plane, whether the levelness of the cylinder plane is qualified can be detected by the level 4. If it is unqualified, the cylinder plane is first leveled.
[0023] Among them, the reference gauge block 1 is in the shape of a cuboid, which is convenient for moving the measuring rod 21 of the micrometer 2 to the stationary blade retaining ring through the movement of the reference gauge block 1 on the cylinder plane when the distance between the cylinder plane and the stationary blade retaining ring is large; the surface roughness of the bottom surface of the reference gauge block 1 is less than 6.3 μm, reducing the friction force when the reference gauge block 1 moves on the cylinder plane, reducing the wear of the bottom surface of the reference gauge block 1, and ensuring the flatness of the bottom surface of the reference gauge block 1.
[0024] The technical solutions of the embodiments of the present invention are completely described above in conjunction with the accompanying drawings. It should be noted that the described embodiments are only a part of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the protection scope of the present invention.
Claims
1. A tool for measuring the height difference of a horizontal plane, characterized in that: It includes a reference gauge block with a bottom surface as a reference plane and a micrometer, wherein the micrometer is clamped at the front end of the reference gauge block and arranged vertically, and the free end of the micrometer side rod is lower than the bottom surface of the reference gauge block; The front end of the reference gauge block is integrally formed with a protruding block extending forward, the thickness of the protruding block is smaller than that of the reference gauge block, a mounting hole axially perpendicular to the bottom surface of the reference gauge block is provided on the protruding block, and the side rod sleeve of the micrometer extends into the mounting hole with clearance fit; A level is provided on the reference gauge block and is parallel to the bottom surface of the reference gauge block; A flat plate parallel to the bottom of the reference gauge block is arranged on the side of the reference gauge block, and side plates arranged vertically and having an L-shaped cross section are provided on both sides of the flat plate, and the level is placed on the flat plate and the side plates are in contact; The reference gauge block is in the shape of a cuboid, and the bottom surface roughness of the reference gauge block is less than 6.3 μm.
2. The horizontal plane height difference measuring tool according to claim 1, characterized in that: The protrusion is provided with a threaded clamping hole, which is symmetrically arranged on the left and right sides of the mounting hole and connected to the mounting hole. The threaded clamping holes are screwed into the clamping bolts, and the inner ends of the clamping bolts are in contact with the side rod sleeves of the micrometer, so that the side rod sleeves of the micrometer are clamped between the two clamping bolts.