Adjusting device for measuring perpendicularity of center column of circle frame of stator

Abstract

The utility model belongs to the technical field of installation of electromechanical equipment in water-power engineering, and particularly relates to a device for adjusting the perpendicularity of a central column of a stator roundness measuring frame, which is used for being connected onto the roundness measuring frame to adjust the perpendicularity of the central column and comprises a conductive wire with one end connected with a heavy object and the other end fixed on a measuring arm. The micrometer is vertically arranged on the central column in a sliding mode, the positive electrode of the battery is electrically connected with the micrometer, and the negative electrode of the battery is electrically connected with one wiring terminal of the direct-current ampere meter; and the other wiring terminal of the direct current ammeter is electrically connected with the measuring arm. According to the utility model, visualization is realized, personal errors are reduced, and the adjustment precision of the verticality of the center column of the large-size and high-precision stator roundness measuring frame is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of installation of electromechanical equipment for hydropower projects, and particularly relates to a device for adjusting the verticality of a central column of a stator circular measuring frame used for assembling a stator of a hydropower station. Background Art

[0002] Stator assembly for large and medium-sized hydropower stations in China typically involves on-site stacking of cores. During construction, a circle measuring frame is commonly used to measure data to control installation quality. The circle measuring frame consists of a center column vertically positioned at the center of the equipment and a measuring arm mounted vertically on the center column. Hydropower equipment is typically installed vertically, so the center column is vertically positioned (i.e., vertically) on the equipment's mounting surface. Before stator installation, the circle measuring frame is first installed. The stators are stacked around the center column. During assembly, the stator's installation position is measured using the measuring arm. If the stator's position is inaccurate, the stator's installation position needs to be adjusted to ensure accurate stator installation. However, the center column must be vertical before measurement with the circle measuring frame to accurately measure the stator's installation position. Traditionally, center column verticality is adjusted by suspending a piano wire with a weight at the end of the measuring arm. A micrometer head is then brought into contact with the wire. The operator, wearing headphones, uses the acoustic signal generated by the contact current between the micrometer head and the wire to determine the verticality of the wire and, consequently, the center column. The accuracy of this adjustment method is easily affected by external environmental noise and the operator's hearing, which in turn affects the measurement of verticality. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a device for adjusting the verticality of the center column of a stator circular measuring frame, which realizes the visualization of the current signal during the verticality measurement process, reduces human error, and improves the adjustment accuracy of the verticality of the center column of a large-size, high-precision stator circular measuring frame.

[0004] The purpose of the present invention is achieved by the following technical solution: A device for adjusting the verticality of the center column of a stator circular measuring frame is provided, which is connected to the circular measuring frame to adjust the verticality of the center column. The device includes a conductive wire with one end connected to a weight and the other end fixed to a measuring arm, a micrometer vertically slidably mounted on the center column, a battery with a positive terminal electrically connected to the micrometer and a negative terminal electrically connected to one terminal of a DC ammeter; and the other terminal of the DC ammeter is electrically connected to the measuring arm.

[0005] Furthermore, the weight is placed in the damping liquid.

[0006] Furthermore, the damping liquid is oil.

[0007] Furthermore, the conductive wire is a piano wire.

[0008] Furthermore, the weight is a heavy hammer.

[0009] Furthermore, the micrometer is arranged on a base that is slidably matched with the central column.

[0010] Compared with the prior art, the benefit of the present invention lies in that: through the adjustment device, under the action of gravity, the weight straightens the conductive wire vertically, and then makes the micrometers of the same length tangent to the conductive wires at different positions (the current value of the DC ammeter can be used to measure whether they are tangent, and then adjust the angle of the center column), so that the center column is parallel to the vertical conductive wire, thereby ensuring the verticality of the center column. During the adjustment process, visualization is achieved, human errors are reduced, and the adjustment accuracy of the verticality of the center column of the large-size, high-precision stator circular measuring frame is improved.

[0011] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In addition, in order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following preferred embodiments are specifically cited and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The present invention is a schematic diagram of an embodiment of a device for adjusting the verticality of a center column of a circle measuring frame.

[0013] Reference numerals

[0014] 1-Center column, 2-Measuring arm, 3-Piano wire, 4-Micrometer, 5-DC ammeter, 6-Battery, 7-Weight, 8-Damping liquid, 9-First wire, 10-Second wire, 11-Third wire. DETAILED DESCRIPTION

[0015] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0016] The utility model provides an embodiment of a device for adjusting the verticality of the center column of a stator measuring frame, as shown in FIG. Figure 1As shown, hereinafter referred to as the adjustment device. The adjustment device is connected to a circle measuring frame to measure the verticality of the center column. Based on the measured verticality, the circle measuring frame is adjusted until the verticality of the circle measuring frame meets the standard. The circle measuring frame typically includes a center column 1 for vertical installation at the center of the hydropower equipment. A measuring arm 2 is vertically mounted on the center column 1. The measuring arm 2 rotates around the center column 1, allowing the end of the measuring arm 2 to measure the stators stacked around the center position, ensuring that the stator installation accuracy meets the design requirements. The center column 1 and measuring arm 2 are existing components of the stator circle measuring frame and will not be described in detail here.

[0017] The adjustment device includes a piano wire 3, a micrometer 4, a DC ammeter 5, a battery 6, a weight 7, a damping fluid 8, and a conductor. One end of the piano wire 3 is fixed to the measuring arm 2, and the other end is connected to the weight 7. Under the action of gravity, the piano wire 3 is vertically positioned below the measuring arm 2. The micrometer 4 is slidably mounted on the center column 1, with the probe extending and retracting perpendicular to the center column 1. As the micrometer 4 slides along the same vertical line as the center column 1, the probe measures the change in the spacing between the piano wire 3 and the center column 1.

[0018] The wires include a first wire 9 connecting the negative terminal of battery 6 to one terminal of DC ammeter 5, a second wire 10 connecting the positive terminal of battery 6 to the housing of micrometer 4, and a third wire 11 connected to another terminal of DC ammeter 5. The other end of third wire 11 is connected to measuring arm 2. The housing and probe of micrometer 4, piano wire 3, and measuring arm 2 are all made of conductive materials, allowing a circuit to be formed between battery 6, micrometer 4, piano wire 3, measuring arm 2, and DC ammeter 5.

[0019] In order to prevent the piano wire 3 and the weight 7 from swinging and affecting the verticality of the piano wire 3, the weight 7 is set in the damping liquid 8. In this embodiment, the damping liquid 8 is oil. The oil is placed in an open container, and then the weight 7 is placed in the oil to increase the resistance to the swing of the weight 7 and keep the piano wire 3 in a vertical state.

[0020] When adjusting the verticality of the center column 1, first connect the piano wire 3 with the weight 7 to the measuring arm 2, and place the weight 7 in the damping liquid 8; then connect one terminal of the DC ammeter 5 to the measuring arm 2 through the third wire 11, and the other terminal to the negative terminal of the battery 6 through the first wire 9; then connect the positive terminal of the battery 6 to the micrometer 4 through the second wire 10; finally, slide the micrometer 4 onto one of the vertical lines on the center column 1 and make the probe extension direction perpendicular to the vertical line, adjust the extension length of the probe, and place the probe of the micrometer 4 against the piano wire 3, and then By manually extending and retracting the probe repeatedly and sliding the micrometer 4 within a small range, the length of the probe that can make the DC ammeter 5 have a unique reading is found, and the length value is recorded as L. At this time, the piano wire 3 is tangent to the probe, and the contact area between the two remains unchanged during sliding, ensuring that the resistance value remains unchanged, thereby making the reading of the DC ammeter 5 unchanged; when the piano wire 3 is not tangent to the probe and is wrapped around the end of the probe, the contact area between the piano wire 3 and the probe will change when the micrometer 4 is slid, thereby causing the resistance value to change and causing the reading of the DC ammeter 5 to change; when the piano wire 3 is not in contact with the probe, the DC ammeter 5 has no reading. Then slide the micrometer 4 to another position in the vertical direction of the center column 1, adjust the micrometer 4 so that the length of the probe extended is L, and then repeatedly adjust the angle of the center column 1, so that the piano wire 3 contacts the probe and the micrometer 4 slides in a small range on the center column 1, the reading of the DC ammeter 5 remains unchanged, at this time the distance between the piano wire 3 and the center column 1 at this position is the same as the distance between the piano wire 3 and the center column 1 at the previous position, the center column 1 is parallel to the piano wire 3, the piano wire 3 is set vertically, and the center column 1 is also set vertically, thereby completing the adjustment of the verticality of the center column 1.

[0021] In other embodiments, the weight 7 can be replaced by a weight of other shapes, which is not limited here.

[0022] In other embodiments, the piano wire 3 may be replaced with a conductive wire having conductive properties.

[0023] In other embodiments, the micrometer 4 can be set on a base that is slidably matched with the central column 1, and ensure that the extension and retraction direction of the probe is perpendicular to the central column 1.

[0024] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for adjusting the verticality of the center column of a stator circle measuring frame, used to be connected to the circle measuring frame to adjust the verticality of the center column, characterized by: The adjustment device includes a conductive wire with one end connected to a weight and the other end used to be fixed on the measuring arm, a micrometer vertically slidably arranged on the central column, a battery with a positive pole electrically connected to the micrometer and a negative pole electrically connected to one of the terminals of the DC ammeter; the other terminal of the DC ammeter is used to be electrically connected to the measuring arm.

2. The device for adjusting the verticality of the center column of a stator circular measuring frame according to claim 1, characterized in that: The weight is placed in the damping fluid.

3. The device for adjusting the verticality of the center column of a stator circular measuring frame according to claim 2, characterized in that: The damping liquid is oil.

4. The device for adjusting the verticality of the center column of a stator circular measuring frame according to claim 1, characterized in that: The conductive wire is a piano wire.

5. The device for adjusting the verticality of the center column of a stator circular measuring frame according to claim 1, characterized in that: The heavy object is a heavy hammer.

6. The device for adjusting the verticality of the center column of a stator circular measuring frame according to claim 1, characterized in that: The micrometer is arranged on a base that is slidably matched with the central column.

Images