CN112444176A - Method for measuring braking glide quantity of electric hoist - Google Patents
Method for measuring braking glide quantity of electric hoist Download PDFInfo
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- CN112444176A CN112444176A CN202011023531.4A CN202011023531A CN112444176A CN 112444176 A CN112444176 A CN 112444176A CN 202011023531 A CN202011023531 A CN 202011023531A CN 112444176 A CN112444176 A CN 112444176A
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- electric hoist
- steel wire
- wire rope
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- scale
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/02—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness
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Abstract
The invention relates to a method for measuring braking glide quantity of an electric hoist. The method comprises the following steps that S1, under the conditions of rated voltage, rated frequency and rated load, the electric hoist adopts a steel wire rope, the steel wire rope is installed in a manner of being matched with the electric hoist, a marking pen is used for marking the steel wire rope artificially, and a scale is fixed on the side of the steel wire rope at a short distance; s2, starting the electric hoist (under the conditions of rated voltage, rated frequency and rated load), enabling eyes to look level on the scale, pressing down a stop button of the electric hoist at the moment when a mark on the steel wire rope passes through the scale, and marking the position, corresponding to the scale, on the steel wire rope by using a marking pen; s3, measuring the distance L' between the two marks by using a measuring tool, dividing by the multiplying power n of the electric hoist steel wire rope, and obtaining a numerical value which is the braking glide quantity L; and S4, repeating the steps of S1-S3 three times, and taking the average value of the three times of measurement data to obtain the measurement result. The invention has the advantages that: the operation is convenient, and the measurement error is greatly reduced.
Description
Technical Field
The invention relates to the technical field of delivery test of electric hoists, in particular to a method for measuring braking glide quantity of an electric hoist.
Background
The existing measurement method comprises the following steps: under the conditions of rated voltage, rated frequency and rated load, a steel wire rope with the diameter of 1mm is adopted, one end of the steel wire rope is tied with a small weight, the other end of the steel wire rope is connected with a fixed micro-opening light (normally closed contact), the normally closed contact is connected in a descending loop controlled by a contactor, and the weight of the weight is enough to enable a switch to act and cut off the descending loop. When the load is lowered to a certain position at a rated speed, the small weight is separated from the load, the lowering circuit is immediately cut off, the load immediately starts to slide downwards, the vertical distance between the measured small weight and the load is the sliding amount, the sliding amount is continuously measured for three times, and the average value of the sliding amount is obtained.
The defects of the prior art scheme are as follows: when the brake slip amount is measured according to the method, the brake slip amount is measured in actual operation, the efficiency is low, and certain insecurity is realized. Furthermore, when the weight is directly measured, the measured data and the actual data have large deviation due to the shaking of the weight and the shape of the weight in the running process.
Disclosure of Invention
The invention aims to provide a method for measuring the braking glide quantity of an electric hoist, so as to overcome the defects in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for measuring braking glide quantity of an electric hoist is characterized by comprising the following steps: s1, adopting a steel wire rope to be matched with the electric hoist to be installed by the electric hoist under the conditions of rated voltage, rated frequency and rated load, artificially marking the steel wire rope by a marking pen, and fixing a scale on the side of the steel wire rope at a short distance;
s2, starting the electric hoist (under the conditions of rated voltage, rated frequency and rated load), enabling eyes to look level on the scale, pressing down a stop button of the electric hoist at the moment when a mark on the steel wire rope passes through the scale, and marking the position, corresponding to the scale, on the steel wire rope by using a marking pen;
s3, measuring the distance L' between the two marks by using a measuring tool, dividing by the multiplying power n of the electric hoist steel wire rope, and obtaining a numerical value which is the braking glide quantity L;
and S4, repeating the steps S1-S3 three times, recording the measured data, and taking the average value of the three measured data to obtain the measurement result.
Preferably, the measuring tool is embodied as a tape measure, a caliper, or the like.
Preferably, the braking slip-off amount of the electric hoist during ascending and descending can be obtained through experimental measurement.
Preferably, the multiplying power n of the electric hoist steel wire rope is more than 4 times.
The invention has the beneficial effects that:
1. the method is simple in principle, convenient and fast to operate, and suitable for full-inspection tests before the production of the electric hoist, and only a scale, a marker pen and a measuring tool are needed;
2. according to the invention, by observing the position of the steel wire rope instead of the load, the observation error caused by shaking caused by lifting or descending of a heavy object in the test process is avoided;
3. the distance between the two marks of the steel wire rope is measured, and the distance is not the vertical distance between the traditional small weight and the weight, so that the measurement error caused by the shape of the weight is avoided;
4. according to the invention, the braking gliding quantity of the electric hoist is obtained by marking one steel wire rope, measuring the distance between two marks and dividing by the multiplying power of the steel wire rope. Because the multiplying power of the existing steel wire rope is approximately more than 4 times, the error in the test process can be reduced, and the test result is very close to the actual value;
5. the invention adopts a marking method, so that the braking gliding amount of the electric hoist in the ascending and descending processes can be obtained through test measurement.
Drawings
FIG. 1 is a schematic diagram of a method for measuring braking glide quantity of an electric hoist according to the present invention;
fig. 2 is a marked schematic diagram of a method for measuring the braking slip-down quantity of the electric hoist according to the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Referring to fig. 1 and 2, the present embodiment is a method for measuring braking slip-down amount of an electric hoist, and is characterized in that: s1, adopting a steel wire rope to be matched with the electric hoist to be installed by the electric hoist under the conditions of rated voltage, rated frequency and rated load, artificially marking the steel wire rope by a marking pen, and fixing a scale on the side of the steel wire rope at a short distance;
s2, starting the electric hoist (under the conditions of rated voltage, rated frequency and rated load), enabling eyes to look level on the scale, pressing down a stop button of the electric hoist at the moment when a mark on the steel wire rope passes through the scale, and marking the position, corresponding to the scale, on the steel wire rope by using a marking pen;
s3, measuring the distance L' between the two marks by using a measuring tool, dividing by the multiplying power n of the electric hoist steel wire rope, and obtaining a numerical value which is the braking glide quantity L;
and S4, repeating the steps S1-S3 three times, recording the measured data, and taking the average value of the three measured data to obtain the measurement result.
The measuring tool is specifically a measuring tape, a caliper and the like. The braking gliding quantity of the electric hoist in the ascending and descending processes is obtained through test measurement. The multiplying power n of the electric hoist steel wire rope is more than 4 times.
The invention has the beneficial effects that:
1. the method is simple in principle, convenient and fast to operate, and suitable for full-inspection tests before the production of the electric hoist, and only a scale, a marker pen and a measuring tool are needed;
2. according to the invention, by observing the position of the steel wire rope instead of the load, the observation error caused by shaking caused by lifting or descending of a heavy object in the test process is avoided;
3. the distance between the two marks of the steel wire rope is measured, and the distance is not the vertical distance between the traditional small weight and the weight, so that the measurement error caused by the shape of the weight is avoided;
4. according to the invention, the braking gliding quantity of the electric hoist is obtained by marking one steel wire rope, measuring the distance between two marks and dividing by the multiplying power of the steel wire rope. Because the multiplying power of the existing steel wire rope is approximately more than 4 times, the error in the test process can be reduced, and the test result is very close to the actual value;
5. the invention adopts a marking method, so that the braking gliding amount of the electric hoist in the ascending and descending processes can be obtained through test measurement.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (4)
1. A method for measuring braking glide quantity of an electric hoist is characterized by comprising the following steps: s1, adopting a steel wire rope to be matched with the electric hoist to be installed by the electric hoist under the conditions of rated voltage, rated frequency and rated load, artificially marking the steel wire rope by a marking pen, and fixing a scale on the side of the steel wire rope at a short distance;
s2, starting the electric hoist (under the conditions of rated voltage, rated frequency and rated load), enabling eyes to look level on the scale, pressing down a stop button of the electric hoist at the moment when a mark on the steel wire rope passes through the scale, and marking the position, corresponding to the scale, on the steel wire rope by using a marking pen;
s3, measuring the distance L' between the two marks by using a measuring tool, dividing by the multiplying power n of the electric hoist steel wire rope, and obtaining a numerical value which is the braking glide quantity L;
and S4, repeating the steps S1-S3 three times, recording the measured data, and taking the average value of the three measured data to obtain the measurement result.
2. The method for measuring the braking slip-down quantity of the electric hoist as claimed in claim 1, characterized in that: the measuring tool is specifically a measuring tape, a caliper and the like.
3. The method for measuring the braking slip-down quantity of the electric hoist as claimed in claim 1, characterized in that: the braking gliding quantity of the electric hoist in the ascending and descending processes is obtained through test measurement.
4. The method for measuring the braking slip-down quantity of the electric hoist as claimed in claim 1, characterized in that: the multiplying power n of the electric hoist steel wire rope is more than 4 times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011023531.4A CN112444176A (en) | 2020-09-25 | 2020-09-25 | Method for measuring braking glide quantity of electric hoist |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011023531.4A CN112444176A (en) | 2020-09-25 | 2020-09-25 | Method for measuring braking glide quantity of electric hoist |
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| Publication Number | Publication Date |
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| CN112444176A true CN112444176A (en) | 2021-03-05 |
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| CN202011023531.4A Pending CN112444176A (en) | 2020-09-25 | 2020-09-25 | Method for measuring braking glide quantity of electric hoist |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118329496A (en) * | 2024-06-14 | 2024-07-12 | 天津通广集团专用设备有限公司 | Electric hoist braking gliding amount detection device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102435117A (en) * | 2011-12-28 | 2012-05-02 | 中国海洋石油总公司 | Method and device for measuring spatial position between submarine pipeline flanges |
| CN102901425A (en) * | 2011-07-28 | 2013-01-30 | 上海宝钢工业检测公司 | Lifting height measurement method for bridge crane |
| JP2013093993A (en) * | 2011-10-26 | 2013-05-16 | Toshiba Schneider Inverter Corp | Inverter device and inverter device teaching method |
| CN204727476U (en) * | 2015-05-20 | 2015-10-28 | 河南省恒远起重机械集团有限公司 | A kind of electric block downslide amount detector |
| CN110950213A (en) * | 2019-12-30 | 2020-04-03 | 暨南大学 | Method for measuring relative slippage of elevator steel wire rope |
-
2020
- 2020-09-25 CN CN202011023531.4A patent/CN112444176A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102901425A (en) * | 2011-07-28 | 2013-01-30 | 上海宝钢工业检测公司 | Lifting height measurement method for bridge crane |
| JP2013093993A (en) * | 2011-10-26 | 2013-05-16 | Toshiba Schneider Inverter Corp | Inverter device and inverter device teaching method |
| CN102435117A (en) * | 2011-12-28 | 2012-05-02 | 中国海洋石油总公司 | Method and device for measuring spatial position between submarine pipeline flanges |
| CN204727476U (en) * | 2015-05-20 | 2015-10-28 | 河南省恒远起重机械集团有限公司 | A kind of electric block downslide amount detector |
| CN110950213A (en) * | 2019-12-30 | 2020-04-03 | 暨南大学 | Method for measuring relative slippage of elevator steel wire rope |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118329496A (en) * | 2024-06-14 | 2024-07-12 | 天津通广集团专用设备有限公司 | Electric hoist braking gliding amount detection device |
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Application publication date: 20210305 |