CN216205914U - Portable measuring tool for measuring concentricity - Google Patents

Abstract

The utility model discloses a portable measuring tool for measuring concentricity, which relates to the technical field of generator measurement and comprises an inner diameter measuring device, a power supply integrated device, an earphone and an external conducting wire; the inner diameter measuring device is a conductor, an insulator is arranged on the inner diameter measuring device, and the insulator cuts off a conductive path of the inner diameter measuring device to separate the inner diameter measuring device into a first conductor and a second conductor; the power supply integrated device comprises a battery, power supply conducting wires and an earphone plug interface, wherein after two ends of the battery are electrically connected with the two power supply conducting wires, the two power supply conducting wires are respectively and electrically connected with a first conductor and a second conductor, the earphone plug interface is arranged on the power supply conducting wires, and an earphone is inserted into the earphone plug interface; the external conductor wire is electrically connected with the end cover of the generator, and the power supply integrated device, the second conductor, the external conductor wire, the end cover, the stator core and the first conductor form an electric loop during measurement.

Description

Portable measuring tool for measuring concentricity

Technical Field

The utility model relates to the technical field of measurement of generators, in particular to a portable measuring tool for measuring concentricity.

Background

At present, when generator units such as 15 ten thousand, 30 ten thousand, 60 ten thousand, 100 ten thousand and the like are assembled in a factory, a steel wire hanging method is needed to measure the concentricity of the inner and outer end covers and the inner diameter of a stator core of a generator. The principle of measuring the concentricity of the stator and the end cover of the generator is shown in figure 2, and a measuring loop of the measuring device consists of an inner diameter measuring tool, a steel wire, an earphone and a lead.

However, when the measurement is performed using this method based on a schematic diagram of a circuit, the following problems are often encountered: firstly, the end cover and the steel wire must be disconnected, otherwise, a closed loop is formed only by contacting the inside micrometer with the stator iron core, and the measuring effect is influenced. Secondly, in order to ensure the measurement precision, the wire and a heavy object are not allowed to be hung on the steel wire in the stator core chamber, so the earphone wire is required to be connected to the outer side of the end cover, the length of the earphone wire is required to meet the requirement, the wire is easy to break in the measurement process, the measurement is extremely inconvenient, and the measurement result and the efficiency are influenced. The method needs to destroy the earphone plug and separate the positive electrode and the negative electrode, and is not beneficial to the long-term use of the earphone. The earphone, the battery, the lead and the earphone wire are scattered, the internal space of the stator core is limited, and the movement is inconvenient.

The utility model patent document with the publication number of CN107024167A and the publication date of 2017, 08.08 discloses a concentricity measuring device of a vertical axial flow pump unit. If the two axes of the vertical motor and the vertical axial-flow pump are not on the same vertical line, the bearing is stressed unevenly in operation, the bearing generates heat in operation, the unit generates vibration and noise, and the unit cannot operate in serious conditions. Therefore, the concentricity of the vertical axial flow pump unit needs to be measured when the vertical axial flow pump unit is installed. During specific construction, an inner dial indicator, an upper guide bearing of the vertical axial-flow pump, a lower guide bearing of the vertical axial-flow pump, the earphone, the battery and the centering device are connected into an electric loop through insulated flexible wires. The measurement is repeated, the shortest length of the measuring rod of each point is taken as the distance from the piano wire to the side wall of the guide bearing, and the measured data of each point are recorded into a table. The concentricity deviation value of the part can be calculated according to the measurement record. When the concentric deviation value does not meet the requirement, the installation of the vertical axial flow pump is adjusted to meet the installation precision requirement, and the installation quality of the vertical axial flow pump unit is ensured.

However, the concentricity measuring apparatus disclosed above is not suitable for measuring the concentricity of the stator core and the end cover of the generator in the generator set such as 15 ten thousand, 30 ten thousand, 60 ten thousand, or 100 ten thousand.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects in the prior art, the utility model aims to provide a portable measuring tool for measuring concentricity, which is provided with an inner diameter measuring device and a power supply integrated device, and simultaneously enables the power supply integrated device, a second conductor, a lead, an end cover, a stator core and a first conductor to form an electric loop, so that a large number of leads are saved, the requirement on the length of a lead of an earphone is reduced, a large amount of work of managing, disassembling and assembling the lead in a narrow stator bore is avoided, the work efficiency is improved, and the influence of the lead on the measurement stability in the measuring process is avoided.

In order to achieve the above purpose, the utility model adopts the technical scheme that:

a portable measuring tool for measuring concentricity comprises an inner diameter measuring device, a power supply integrated device, an earphone and an external conducting wire;

the inner diameter measuring device is a conductor, an insulator is arranged on the inner diameter measuring device, the insulator cuts off a conductive path of the inner diameter measuring device to separate the inner diameter measuring device into a first conductor and a second conductor, and the first conductor and the second conductor are coaxially arranged;

the power supply integrated device comprises a battery, power supply conducting wires and an earphone plug interface, wherein after two ends of the battery are electrically connected with the two power supply conducting wires, the two power supply conducting wires are respectively and electrically connected with the first conductor and the second conductor, the earphone plug interface is arranged on the power supply conducting wires, and an earphone is inserted into the earphone plug interface;

the external conducting wire is electrically connected with the end cover of the generator, and the power supply integration device, the second conductor, the external conducting wire, the end cover, the stator core and the first conductor form an electric loop during measurement.

Furthermore, the power supply integrated device further comprises a battery box, the battery is located in the battery box, and the earphone plug interface is located on the side wall of the battery box.

Further, a clamp for fixing the battery case on the inner diameter measuring device is arranged at the bottom of the battery case.

Further, the inner diameter measuring device is an inner micrometer, and the insulator is an insulating transition joint.

Further, the earphone plug interface is a universal earphone jack.

Further, the external conductive wire is a steel wire.

The utility model has the beneficial effects that:

1. in the utility model, the power supply integration device, the second conductor, the external conductor wire, the end cover, the stator core and the first conductor form an electric loop, namely, the inner diameter measuring device, the end cover and the stator core form a closed loop, and the end cover and the stator core are added into the measured closed loop, so that the measuring error caused by the contact of the inner diameter measuring device and the external conductor wire with the stator core and the end cover in the measuring process is avoided.

2. In the utility model, the length of the earphone wire is not required to be overlong, the earphone can be a common earphone, and the earphone plug is inserted into the earphone plug interface of the power supply integrated device, so that the accidents of breakage of the earphone wire, inconvenience in measurement and influence on the measurement result and efficiency caused by overlong earphone wire are avoided.

3. In the utility model, the earphone plug is inserted into the earphone plug interface of the power supply integrated device, and the anode and the cathode are separated without damaging the earphone plug of the earphone, so that the service life of the earphone is greatly prolonged.

4. In the utility model, the battery, the power supply conducting wire and the earphone plug interface are integrated in the battery box, thereby facilitating the movement in the stator core.

5. The utility model saves a large number of wires and reduces the requirement on the length of the earphone wires; a large amount of work such as management, wire dismounting and the like in a narrow stator chamber is avoided, and the work efficiency is greatly improved; the influence of the conducting wire on the measurement stability in the measurement process is avoided.

Drawings

FIG. 1 is a schematic view of the present invention;

FIG. 2 is a schematic diagram of the prior art;

reference numerals:

1. an inner diameter measuring device; 11. an insulator; 12. a first electrical conductor; 13. a second electrical conductor; 2. a power supply integration device; 21. a battery; 22. a power supply conductive line; 23. an earphone plug interface; 24. a battery case; 3. connecting an electric lead externally; 4. a stator core; 5. and (4) end covers.

Detailed Description

The conception, the specific structure and the technical effects of the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features and the effects of the present invention.

Example 1

A portable measuring tool for measuring concentricity, as shown in figure 1, comprises an inner diameter measuring device 1, a power supply integrated device 2, an earphone and an external conducting wire 3.

The inside diameter measuring device 1 is a conductive body, an insulator 11 is provided on the inside diameter measuring device 1, the insulator 11 blocks a conductive path of the inside diameter measuring device 1 to separate the inside diameter measuring device 1 into a first conductive body 12 and a second conductive body 13, and the first conductive body 12 and the second conductive body 13 are coaxially provided.

The power supply integrated device 2 comprises a battery 21, power supply conducting wires 22 and an earphone plug interface 23, wherein after the two ends of the battery 21 are electrically connected with the two power supply conducting wires 22, the two power supply conducting wires 22 are respectively and electrically connected with the first conductor 12 and the second conductor 13, the earphone plug interface 23 is arranged on the power supply conducting wires 22, and an earphone is inserted into the earphone plug interface 23.

The external conducting wire 3 is electrically connected with the end cover 5 of the generator, and the power supply integrated device 2, the second conductor 13, the external conducting wire 3, the end cover 5, the stator core 4 and the first conductor 12 form an electric loop during measurement.

In this embodiment, the inner diameter measuring device 1 is used for measuring the concentricity of the stator core 4 of the generator and the end cover 5, the power supply integration device 2 is used for supplying power to the measuring tool, the earphone is connected in series on the line and used for measuring whether the line is connected, and the external conductive wire 3 is used for electrically connecting the inner diameter measuring device 1 and the end cover 5 and is a measuring reference.

In this embodiment, the power supply integration device 2, the second conductor 13, the external conductor wire 3, the end cover 5, the stator core 4 and the first conductor 12 form an electrical loop, that is, the inner diameter measurement device 1, the end cover 5 and the stator core 4 form a closed loop, and the end cover 5 and the stator core 4 are added into the measured closed loop, so that a measurement error caused by contact between the inner diameter measurement device 1 and the external conductor wire 3 and the stator core 4 and the end cover 5 in a measurement process is avoided.

Meanwhile, the length of the earphone wire of the embodiment does not have the overlong requirement, the earphone with the common wire length can meet the requirement of measurement, and the earphone plug is inserted into the earphone plug interface 23 of the power supply integrated device 2, so that the accidents that the earphone wire is broken due to the overlong earphone wire, the measurement is inconvenient, and the measurement result and the efficiency are influenced are avoided. In addition, the earphone plug of the earphone does not need to be damaged to separate the positive electrode and the negative electrode, so that the service life of the earphone is greatly prolonged.

Example 2

This embodiment is further improved on the basis of embodiment 1, as shown in fig. 1, the power supply integrated device 2 further includes a battery box 24, the battery 21 is located in the battery box 24, and the headphone plug interface 23 is located on the side wall of the battery box 24. The battery 21, the power supply conducting wire 22 and the earphone plug interface 23 are integrated in the battery box 24, so that the battery is convenient to integrate and carry during measurement. The clamping that is used for fixing battery case 24 on internal diameter measuring device 1 is provided with to battery case 24 bottom to fix power supply integrated device 2 on internal diameter measuring device 1, survey crew holds internal diameter measuring device 1 when removing and can remove power supply integrated device 2 in the lump, has avoided carrying and managing to parts such as wire, battery, greatly reduced intensity of labour in the stator bore.

The inner diameter measuring device 1 is an inner micrometer, and the insulator 11 is an insulating transition joint and used for cutting off a conductive path of the inner micrometer. The earphone plug interface 23 is a universal earphone jack, and an earphone is inserted during measurement, so that the management of an earphone wire in the measurement process is facilitated. The external conductive wire 3 is a steel wire.

For a better understanding of the present invention, the following is a complete description of the working principle of the present invention:

before measuring the concentricity of the generator stator and the end cover, the external conductive wire 3 is fixed on the end cover 5 and transversely penetrates through the stator core 4 to be parallel to the stator core 4. Then, a measurer holds the inner diameter measuring device 1, the power supply integrated device 2 and the earphone in hand and enters the stator core 4.

During the measurement, survey crew inserts the earphone in headphone plug interface 23 and wears at the ear, it is perpendicular with inside micrometer and stator core 4's axis, and make its first electric conductor 12 and stator core 4 contact, adjust the expansion end of inside micrometer's second electric conductor 13 simultaneously, make it be connected with external conductor wire 3, when the expansion end of second electric conductor 13 is connected with external conductor wire 3, power supply integrated device 2, second electric conductor 13, external conductor wire 3, end cover 5, stator core 4 and first electric conductor 12 constitute electric circuit, just can hear the sound of "chuck" in the earphone, and record the reading of inside micrometer this moment.

During measurement, at least four points (upper, lower, left and right) are measured around the external conductive wire 3, the position of the external conductive wire 3 is adjusted according to the measurement result so as to adjust the concentricity of the external conductive wire 3 and the stator core 4 to be within the standard requirement, and the position of the external conductive wire 3 is the center of the stator core 4. And then the concentricity of the end cover 5 and the external conducting wire 3 is measured by using the method as a reference, so that the concentricity of the outer end cover 5 and the stator core 4 can be obtained. The method thus finally measures the concentricity of the stator core 4 and the end cap 5.

The embodiments of the present invention have been described in detail, but the present invention is not limited to the embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and the equivalents or substitutions are included in the scope of the present invention defined by the claims.

Claims (6)

1. A portable measuring tool for measuring concentricity, comprising: comprises an inner diameter measuring device (1), a power supply integrated device (2), an earphone and an external conducting wire (3);

the inner diameter measuring device (1) is a conductor, an insulator (11) is arranged on the inner diameter measuring device (1), the insulator (11) cuts off a conductive path of the inner diameter measuring device (1) to separate the inner diameter measuring device (1) into a first conductor (12) and a second conductor (13), and the first conductor (12) and the second conductor (13) are coaxially arranged;

the power supply integrated device (2) comprises a battery (21), power supply conducting wires (22) and an earphone plug interface (23), after two ends of the battery (21) are electrically connected with the two power supply conducting wires (22), the two power supply conducting wires (22) are respectively and electrically connected with the first conductor (12) and the second conductor (13), the earphone plug interface (23) is arranged on the power supply conducting wires (22), and the earphone is inserted into the earphone plug interface (23);

the external conducting wire (3) is electrically connected with the end cover (5) of the generator, and the power supply integrated device (2), the second conductor (13), the external conducting wire (3), the end cover (5), the stator core (4) and the first conductor (12) form an electric loop during measurement.

2. The portable measuring tool of claim 1, wherein: the power supply integrated device (2) further comprises a battery box (24), the battery (21) is located in the battery box (24), and the earphone plug interface (23) is located on the side wall of the battery box (24).

3. The portable measuring tool of claim 2, wherein: the bottom of the battery box (24) is provided with a clamp used for fixing the battery box (24) on the inner diameter measuring device (1).

4. The portable measuring tool of claim 1, wherein: the inner diameter measuring device (1) is an inner micrometer, and the insulator (11) is an insulating transition joint.

5. The portable measuring tool of claim 1, wherein: the earphone plug interface (23) is a universal earphone jack.

6. The portable measuring tool of claim 1, wherein: the external electric lead (3) is a steel wire.

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