Auxiliary tool for measuring elongation of screw

Abstract

The utility model relates to an auxiliary tool for measuring the elongation of a bolt in the bolt disassembly and assembly process of a water-turbine generator set, which comprises a magnetic base, an extension rod and a platform, when the bolt is stretched, the elongation auxiliary tool is adsorbed in the middle of a screw rod, a nut, a stretcher base and a stretcher stretching head are sequentially mounted, and a dial indicator is erected. The probe of the dial indicator abuts against the plane, the length of the bolt changes, the problem that the dial indicator cannot be erected for measurement in actual engineering is solved, the data accuracy is guaranteed, the rationality of the disassembly and assembly process is guaranteed, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of measurement, in particular to an auxiliary tool for measuring the elongation of a screw rod. Background Art

[0002] During the maintenance of the unit, large-size bolts such as top cover bolts, large shaft bolts, frame foundation bolts, guide vane lifting screws, etc. need to measure the elongation during the disassembly and installation process. During the use of the tensioner or tooling, due to the insufficient length of the dial gauge probe, the dial gauge probe cannot directly reach the end of the screw or there is no suitable dial gauge installation point, resulting in the problem of inability to measure or inaccurate measurement data. In view of the above problems, an auxiliary tool is designed to solve the problem that the dial gauge cannot be set up for measurement, ensure the accuracy of the measurement data, ensure the rationality of the disassembly and assembly process, and improve work efficiency.

[0003] When the object to be measured is an internal screw near one side of the wall, or a screw or a screw in a narrow hole, the existing dial indicator cannot measure directly or accurately. Utility Model Content

[0004] The utility model solves the problem that the existing dial gauge probe is not long enough to detect and solves the problem that the end of the screw in a narrow hole cannot be measured or the measured data is inaccurate.

[0005] In order to solve the above problems, the present application is implemented through the following technical solutions:

[0006] A screw rod elongation measurement auxiliary tool comprises a platform, a first groove is arranged at the bottom center of the platform, a light-transmitting hole is also arranged in the platform, the first groove is spirally fixedly connected to the rod head on one side of the extension rod, and the rod head on the other side of the extension rod is spirally connected to the second groove at the top center of the base, and a laser lamp and a battery are also installed on the top of the base.

[0007] The battery is connected to the negative electrode of the laser lamp through a negative electrode line.

[0008] The battery is connected to the extension rod through the front section of the positive electrode line, and the extension rod is connected to the positive electrode of the laser lamp through the rear section of the positive electrode line.

[0009] A magnet is arranged at the bottom of the base.

[0010] The base material is ceramic.

[0011] The material of the extension rod is one or more of iron, nickel and cobalt.

[0012] The tops of the rod heads on both sides of the extension rod are conical.

[0013] The laser lamp is vertically fixedly connected to the base.

[0014] The distance between the laser light and the second groove is equal to the distance between the first groove and the light-transmitting hole.

[0015] The battery is connected to the inner wall of the second groove through the front half and the rear half of the positive electrode line.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] 1. The elongation measurement auxiliary tool can measure the change of bolt length under different environmental conditions by using extension rods of different lengths, avoiding the problem that the dial indicator probe is short and cannot be used for normal measurement in most holes.

[0018] 2. The magnetic base can be firmly adsorbed on the end of the screw to ensure the stability and accuracy of the measurement.

[0019] 3. Using a smooth surface platform as the measuring surface of the dial indicator reduces the measurement difficulty and improves the accuracy of the measurement data and the efficiency of the measurement.

[0020] 4. This device is equipped with a laser light. The beam emitted by the laser light and the light-transmitting hole can determine whether the parallel position of the platform and the base of the calibration device is in a normal state, thereby avoiding the error caused by the tilt angle of the device extension rod. After use, the extension rod can be easily disassembled. After disassembly, the laser light will not emit light, saving battery power. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the cross-sectional structure of the auxiliary elongation measuring device of the utility model before connection;

[0022] Figure 2 It is a schematic diagram of the structure of the elongation auxiliary measuring device platform in an upward view of the utility model;

[0023] Figure 3 It is a top view structural schematic diagram of the base of the elongation auxiliary measuring device of the utility model;

[0024] Figure 4 It is a schematic diagram of the cross-sectional structure of the auxiliary elongation measuring device of the utility model after connection;

[0025] Figure numerals: platform 1, first groove 101, light-transmitting hole 102, extension rod 2, rod head 201, base 3, second groove 301, magnet 302, laser light 303, positive line 3031, negative line 3032, battery 304; AA is the light beam. DETAILED DESCRIPTION

[0026] It should be understood that the terms "upper", "vertical", "top", "bottom", "inside", "outside", "end", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0027] Example 1

[0028] Device structure introduction: The device consists of a base 3, an extension rod 2 and a platform 1. Please refer to Figure 1~Figure 3 .

[0029] A screw elongation measurement auxiliary tool comprises a platform 1, a first groove 101 is arranged at the bottom center of the platform 1, a light-transmitting hole 102 is also arranged in the platform 1, the first groove 101 is spirally fixedly connected to a rod head 201 on one side of an extension rod 2, the rod head 201 on the other side of the extension rod 2 is spirally connected to a second groove 301 at the top center of a base 3, and a laser lamp 303 and a battery 304 are also arranged on the top upper surface of the base 3.

[0030] The battery 304 is connected to the negative electrode of the laser light 303 through the negative electrode line 3032. The battery 304 is connected to the extension rod 2 through the front half of the positive electrode line 3031, and the extension rod 2 is connected to the positive electrode of the laser light 303 through the back half of the positive electrode line 3031. A magnet 302 is provided at the bottom of the base 3. The upper layer material of the base 3 is insulating ceramic. The material of the extension rod 2 is one or more of iron, nickel, and cobalt.

[0031] The tops of the rod heads 201 on both sides of the extension rod 2 are both conical. The laser lamp 303 is vertically fixedly connected to the base 3. The light beam AA is emitted vertically to the base 3, and the distance between the laser lamp 303 and the second groove 301 is equal to the distance between the first groove 101 and the light-transmitting hole 102. The front half and the rear half of the positive line 3031 of the battery 304 are connected to the inner wall of the second groove 301.

[0032] A magnet 302 is mounted at the bottom of the base 3. The magnet 302 is cylindrical. A screw hole protrudes from the second groove 301 to connect to a rod head 201 on one side of the extension rod 2, so as to connect and fix the extension rod 2.

[0033] The rod heads 201 at both ends of the extension rod 2 are threaded, which is convenient for spiral fixing and connecting the platform 1 and the base 3. The front half and the rear half of the positive wire 3031 are connected to the inner wall of the second groove 301. The connection between the positive wire 3031 and the extension rod 2 is set above the thread of the rod head 201 of the extension rod 2 to prevent poor circuit contact when the thread of the rod head 201 is in contact with the positive wire 3031. The extension rod 2 can be set in various lengths and sizes.

[0034] The application steps of the device are as follows: the base 3, the extension rod 2 and the platform 1 are installed in sequence, the positive pole of the battery 304 is connected to the positive pole of the laser light 303 through the positive line 3031 and the extension rod 2, the battery 304 is connected to the negative pole of the laser light 303 through the negative line 3032, the indicator light of the laser light 303 is on, and the magnet 302, an auxiliary tool for elongation measurement, is placed in the middle of the object to be measured. When the magnet 302 is adsorbed on the surface of the object to be measured, the light hole 102 is rotated to the top of the front of the laser light 303, and the emitted light completely passes through the light hole 102, and the upper surface of the platform 1 and the base 3 of the device are in a parallel state.

[0035] When setting up the dial indicator, place the dial indicator probe against the platform 1, and the dial indicator can be used to measure the change in length, width or height of the platform 1, thereby replacing the change in length, width or height at the contact surface between the magnet 302 and the object to be measured. This solves the problem that devices such as bolts in narrow holes cannot be measured. When the light beam AA fails to pass through the hole 102, reinstall or replace the extension rod 2 and correct the position of the light beam AA so that the light beam AA completely passes through the hole 102. The extension rod 2 vertically connects the base 3 and the platform 1 until the base 3 and the platform 1 are in a parallel state.

[0036] This device avoids the problem that the dial gauge probe is insufficient in length and cannot effectively measure the surface error of bolts in narrow holes or other internal devices. It also solves the problem that the dial gauge cannot directly measure the bolts inside the wall or the wall hole.

[0037] In addition, the description of the present invention is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments. The platform 1 and the extension rod 2 of the present device can be set to a variety of lengths, or some of the technical features can be replaced by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A screw elongation measurement auxiliary tool, comprising a platform (1), characterized in that: A first groove (101) is provided at the center of the bottom of the platform (1), and a light-transmitting hole (102) is also provided in the platform (1); the first groove (101) is screw-fixedly connected to a rod head (201) on one side of the extension rod (2); the rod head (201) on the other side of the extension rod (2) is screw-fixedly connected to a second groove (301) at the center of the top of the base (3); and a laser light (303) and a battery (304) are also mounted on the top of the base (3).

2. The screw elongation measurement auxiliary tool according to claim 1, characterized in that: The battery (304) is connected to the negative electrode of the laser lamp (303) via a negative electrode line (3032).

3. The screw elongation measurement auxiliary tool according to claim 1, characterized in that: The battery (304) is connected to the extension rod (2) by laminating the front section of the positive electrode line (3031), and the extension rod (2) is connected to the positive electrode of the laser lamp (303) by laminating the rear section of the positive electrode line (3031).

4. The screw elongation measurement auxiliary tool according to claim 1, characterized in that: A magnet (302) is mounted on the bottom of the base (3).

5. The screw elongation measurement auxiliary tool according to claim 1, characterized in that: The base (3) is made of ceramic.

6. The screw elongation measurement auxiliary tool according to claim 1, characterized in that: The material of the extension rod (2) is one or more of iron, nickel and cobalt.

7. The screw elongation measurement auxiliary tool according to claim 1, characterized in that: The tops of the rod heads (201) on both sides of the extension rod (2) are conical.

8. The screw elongation measurement auxiliary tool according to claim 1, characterized in that: The laser lamp (303) is vertically fixedly connected to the base (3).

9. The screw elongation measurement auxiliary tool according to claim 1, characterized in that: The distance between the laser light (303) and the second groove (301) is equal to the distance between the first groove (101) and the light-transmitting hole (102).

10. The screw elongation measurement auxiliary tool according to claim 1, characterized in that: The battery (304) is connected to the inner wall of the second groove (301) via the front half and the rear half of the positive electrode line (3031).

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