|Track Maintainence, Railway Measurement Railway Inspection
|Aluminium Alloy, Aluminium Alloy
1676mm Rail Track Measuring Equipment,
1600mm Rail Track Measuring Equipment,
Alloy Digital Track Gauge
Introduction of 600mm,750mm,762mm,900mm,1000mm,1067mm,1435mm 1520mm,1600mm,1676mm digital track gauge
The gauge ruler is a special measuring instrument used to measure the gauge between the two steel rails of the railway line. The feature of the rail gauge is that the ruler rod is composed of a wooden ruler rod and a metal ruler rod through a folding mechanism, and the two rulers form a composite rod ruler.
The gauge ruler is a narrow-gauge track detection device. Its structure consists of a ruler body, a scale ruler and a free frame on the ruler body. The ruler body is a duplex profile structure, in the shape of a square tube. It extends outward, and there is a slot on the inner side of the outer edge. Insert the stainless steel scale into the slot, and then fix it with a pin at the end. There is a free frame in the middle of the scale body. There are adjustment bolts fixed on the side plate, the cross plate and the measuring head are installed at the end of the ruler body, and the whole gauge ruler has a T-shaped structure.
Property of 600mm,750mm,762mm,900mm,1000mm,1067mm,1435mm1520mm,1600mm,1676mm digital track gauge
The function of the gauge
In terms of the measurement implementation method of the gauge gauge, the functions of the gauge gauge are divided into two parts: one is the lateral length measurement, including the gauge, inspection interval and back guard distance. These three parameters are interrelated and mutually restrictive. According to the current value transmission method, the measurement error gradually increases from the gauge to the inspection interval, and then to the distance of the back guard; the second is the vertical height measurement, including horizontal and super High, as the static geometric parameters of the line, the two are essentially different in meaning, the horizontal belongs to the category of geometric tolerance (equivalent to parallelism or inclination), and the superelevation belongs to the category of dimensional tolerance (with the pre-measurement between the two rails of the line). It is related to the height difference). For the gauge ruler, it is not distinguished from the measurement principle and measurement method. It is generally believed that the level refers to the small superelevation (including the zero superelevation), and sometimes the terms of the two are used interchangeably. This is because in line measurement, the straight line section mainly focuses on the level, and the curve section mainly focuses on the superelevation, and it is realized by the same measuring unit with the same measuring instrument, which creates the illusion of unity (or repetition) of the terminology.
The importance of the gauge
Gauge, level and superelevation are the basic geometric parameters of railway lines, and their pros and cons are directly related to the running safety of railway trains. As an important railway-specific measuring instrument that provides a direct technical basis for line maintenance and construction, the railway gauge ruler is mainly used for static measurement of these geometric parameters. The ultra-high measurement results indirectly realize the measurement of distortion (commonly known as "triangle pit") .
With the improvement of technical requirements of railway lines, especially the speed-up reconstruction of existing lines and the continuous acceleration of the construction process of passenger dedicated lines, in order to ensure the stable and high technical requirements of the gauge gauge and the daily verification quality of the gauge gauge, strengthen the gauge It is more and more necessary to manage the daily use of the ruler.
Environmental adaptability of track gauge
The working conditions of the gauge gauge are very bad. In order to meet the requirements of use, the following issues should also be paid attention to in the design of the gauge gauge: (1) Grade 0 and 1 gauge gauges should deal with the gauge, inspection interval and back guard distance. The display value is automatically compensated and corrected according to the actual ambient temperature; (2) The display value variability, display time, working voltage and battery capacity of the digital gauge gauge should be adapted to the actual situation on site; (3) In high temperature, low temperature, constant humidity and heat , Electromagnetic compatibility, rain and other normal conditions should be able to work normally; (4) Can withstand abnormal adverse conditions such as drop, vibration; (5) Ensure that under frequent reciprocating working conditions, the gauge structure and measurement performance should be keep it steady. These requirements, it is necessary to make clear requirements in the relevant standards. As for other special requirements of specific users, they can be agreed in the purchase and sale contract.
Daily maintenance and maintenance of the gauge gauge
In addition to the normal maintenance, the following 4 points should be paid special attention to.
(1) After the gauge gauge calibrator with dial indicator completes the calibration work, the movable probe of the gauge should be adjusted to the appropriate position, and the dial indicator probe should be completely released, so that the balance spring of the dial indicator is completely in the position. unstressed state.
(2) After the verification work is completed, the work gauge should be hung vertically for storage. If the gauge is placed horizontally, the self-weight deformation should be considered, and a reasonable support position should be selected.
(3) The choice of support position. The gauge is a slender rod, and the actual value of its length (1435±0.20) mm is used. Therefore, the Bezier point support should be used in the selection of the support position, that is, the support position a=0.2203L. In the formula, a is the support position, mm; L is the length of the gauge, mm.
(4) For the calibrator using the digital display ruler, when the digital display ruler is disassembled for inspection, the digital display meter and the ruler shall not be disassembled, but should be disassembled as a whole to avoid the loss of the limit piece. In short, the measurement personnel should strictly implement the verification procedures in the verification process, conscientiously perform the operation procedures, standardize the filling of the verification records, and correctly present the verification certificate, so as to ensure the accurate and reliable transmission of the value  .
Analysis and editing of the technical state of the gauge gauge
Limitations of traditional gauges
The accuracy index of the traditional mechanical gauge gauge is affected and restricted by the structure of the gauge gauge, the conditions of use, the measurement technology level of the user, the manufacturing level and other factors, although the measurement performance at room temperature can meet the relevant standards and The requirements of metrological technical regulations, but under other environmental conditions, it cannot be fully guaranteed that the relevant requirements will still be met. At present, the commonly used aluminum ruler body (light in weight, suitable for single-person hand-carrying under field conditions), because its linear expansion coefficient is quite different from that of sleepers, it is obviously affected by the ambient temperature of use. When there is a temperature difference (20°C), the expansion and contraction amount of the gauge gauge is greater than the expansion and contraction amount of the sleeper (the expansion and contraction amount of the sleeper is consistent with the expansion and contraction amount of the wheelset of the locomotive and vehicle), so that the indicated value of the gauge is the same as the actual gauge value at this temperature. Inconsistent, resulting in additional indication error. In areas with harsh operating environments, the actual gauge error even reaches 0.8-1mm. This effect seems to be less significant for the management value (+4-2mm) of line maintenance in the past, but for the current line management value (+4-2mm) ±2mm), especially the management value of ballastless track (±1mm), it is necessary to pay enough attention to this influence and its elimination measures. Due to the limitation of measurement method, use conditions, production process, cost and other factors, the ultra-high measuring device of the gauge gauge can only meet the allowable error requirement of ±1.3mm for the super-high indication value of various mechanical gauge gauges at present. . The irregular use and operation of the gauge gauge (such as positioning and reading) is also the cause of large measurement errors during use.
Main technical features of the new gauge gauge
The birth of the digital display gauge has opened up a new way to solve the above problems, which is mainly reflected in the following aspects: First, the level and ultra-high measurement accuracy is significantly improved to meet the ultra-high measurement requirements of speed-increasing lines; Automatically eliminate the additional error of the ambient temperature on the gauge measurement, and improve the accuracy of the gauge measurement; thirdly, it can realize the hardware replacement or maintenance of the gauge probe under normal wear and tear, and improve the use efficiency and service life of the gauge gauge.
Digital gauges display measurement results in digital form, completely eliminating both visual errors and estimated readings between lines.
Due to the manual selection of measuring points instead of continuous measurement, the unreliability of the measurement results caused by external factors such as rail flash, oil pollution, rust, and uneven rail welds is avoided.
This product is divided into 600 type, 900 type, 1435 type.
-30°C to +60°C.
When in use, just press the power switch button, the instrument will display the measurement results immediately without any training.
The red light-emitting digital tube displays the measurement results, the reading is convenient, the data is clear and intuitive
The operator can clearly see all the measurement data from a display window without bending over, which is particularly prominent when the instrument is used in low ambient light, at night, in emergency situations and in tunnels.
The digital gauge gauge automatically completes the measurement of all data, completely eliminating the need to bend down to adjust the degree wheel, align the zero position of the level bubble, look at the ultra-high scale, and then correct the line from the magnifying glass when using the mechanical gauge gauge. The tedious operation procedure of looking at the gauge scale from the top reduces the labor intensity of the operator, shortens the measurement time, and improves the operation efficiency. Straight line measurement increases the efficiency by 40%, curve measurement increases the efficiency by 60%, and the curve measurement in the tunnel increases the efficiency by more than double.
The national standard stipulates that the ruler is a strong inspection device, and the inspection period is three months. There are 11 inspection items for a ruler. Among these 11 tasks, the most time-consuming and laborious work is mainly concentrated on the mechanical marking mechanism. Repair and replacement, including the replacement of probe wear exceeding the standard, the marking of the gauge scale, the marking of the scale wheel, the treatment of the magnifying glass becoming blurred, the repair of the mechanical rotation of the scale wheel being inflexible, and the adjustment of the correctness of the zero position of the level bubble, etc. . Since these works are caused by mechanical wear and deformation, maintenance and verification are very difficult. The digital gauge ruler completely cancels the mechanical engraving measuring mechanism, so the maintenance and verification work is greatly reduced, and 11 verification tasks are reduced to 7. At present, it only takes 5 minutes to calibrate a digital gauge ruler, and the work efficiency is improved by nearly 40%. times.
Because the digital gauge ruler completely cancels the mechanical engraving measuring mechanism. Therefore, the cost of replacing parts of the mechanical reticle measuring mechanism is completely eliminated.
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