CN215984831U - Weighing platform type rail weighbridge precision adjusting device - Google Patents
Weighing platform type rail weighbridge precision adjusting device Download PDFInfo
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- CN215984831U CN215984831U CN202122538079.1U CN202122538079U CN215984831U CN 215984831 U CN215984831 U CN 215984831U CN 202122538079 U CN202122538079 U CN 202122538079U CN 215984831 U CN215984831 U CN 215984831U
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Abstract
The utility model discloses a precision adjusting device for a weighing platform type rail weighbridge, and relates to the technical field of weighing platform type weighbridge. This weighing platform formula rail weighbridge precision adjusting device, including rail weighbridge foundation ditch and weighing display appearance, respectively be provided with a weighing sensor base on the four corners of rail weighbridge foundation ditch, be provided with a weighing sensor on every weighing sensor base, an integral rectangle balance beam frame is placed at four weighing sensor's top. The weighing platform type rail weighbridge precision adjusting device is simple to implement, small in workload and low in requirement on the skill of constructors, can greatly reduce unbalance loading errors under the heavy-load condition of a molten steel tank car, and improves the static weighing and metering precision of the rail weighbridge to be higher than the precision of a level meter.
Description
Technical Field
The utility model relates to the technical field of weighing platform type railroad track scale, in particular to a precision adjusting device of a weighing platform type railroad track scale.
Background
The platform type static rail weighbridge is widely applied to the steel industry due to high weighing precision. After the converter finishes discharging steel, the ladle car carries the full ladle and the weight of the molten steel is weighed by a weighing platform, and then the external refining is carried out according to the weight of the molten steel. The weight of the molten steel is taken as an important parameter of the external refining process, and the weighing precision requirement of the molten steel must meet within three thousandths. In order to ensure the weighing and metering precision and enough bearing strength of the rail weighbridge, the molten steel rail weighbridge is generally distributed by adopting a plurality of groups of sensors and double weighing platforms; when the molten steel tank car is statically placed on the weighing platform, the wheels are just above each pair of sensors, so that the static measurement of the weight of the molten steel is realized.
The platform type rail weighbridge mainly comprises a concrete foundation pit, a weighing sensor base, a weighing sensor and a weighing platform; the weighing platform is composed of a weighing beam frame, a weighing rail and longitudinal and transverse limit devices. The weighing platform type rail weighbridge relates to the maintenance of concrete foundation pit ash removal, weighing sensor base bending, weighing sensor updating, weighing platform longitudinal and transverse limiter replacement, weighing platform deformation treatment and the like, and needs to hoist the weighing platform again and adjust the levelness of the weighing platform.
In order to ensure the weighing precision of the rail weighbridge, the traditional method is to use a suspension wire and a level meter to repeatedly measure and adjust the elevations of weighing sensors dispersed at different positions, so that all the weighing sensors are positioned on the same horizontal plane, and finally, a weighing platform is hoisted to ensure that four corners of a weighing beam frame are respectively supported by four column sensors, so that the horizontal alignment work is complicated and has high labor intensity, even if the platform surface of a no-load weighing platform is in a horizontal state after alignment, the deflection error caused by the rigidity of a weighing sensor base of a heavy-load bearing assembly, the weighing beam frame and a weighing rail is difficult to eliminate, and therefore, the weighing static error of the rail weighbridge horizontally aligned by the traditional method is more than 7 per thousand, and the process precision requirement cannot be met.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
Aiming at the defects of the prior art, the utility model provides a weighing platform type rail weighbridge precision adjusting device, which solves the problems that the traditional method uses a suspension wire and a level meter to repeatedly measure and adjust the elevations of weighing sensors dispersed at different positions, so that all the weighing sensors are positioned on the same horizontal plane, and finally, a weighing platform is hoisted to ensure that four corners of a weighing beam frame are respectively supported by four column sensors, so that the horizontal alignment work is complicated, the labor intensity is high, and even if the platform surface of a no-load weighing platform is in a horizontal state after alignment, the deflection error caused by the rigidity of a weighing sensor base of a heavy-load bearing assembly, the weighing beam frame and a weighing rail is difficult to eliminate. Therefore, the static weighing error of the track scale horizontally aligned by the traditional method reaches more than 7 per mill, and the process precision requirement cannot be met.
(II) technical scheme
In order to achieve the purpose, the utility model is realized by the following technical scheme: the utility model provides a title platform formula track scale precision adjustment device, includes track scale foundation ditch and weighing display appearance, respectively be provided with a weighing sensor base on the four corners of track scale foundation ditch, be provided with a weighing sensor on every weighing sensor base, an integral rectangle is called roof beam frame is placed at four weighing sensor's top, the four corners of calling roof beam frame is supported by the weighing sensor of below, be provided with hydraulic lifting device on the track scale foundation ditch under calling roof beam frame four corners, the both sides top of calling roof beam frame is provided with the rail of weighing, be provided with the support of moving about freely and quickly stopper and through moving about freely and quickly stopper in calling roof beam frame and fix on the track scale foundation ditch, weighing sensor and weighing display appearance electric connection.
(III) advantageous effects
The utility model provides a weighing platform type rail weighbridge precision adjusting device. The method has the following beneficial effects:
the weighing platform type rail weighbridge precision adjusting device is simple to implement, small in workload and low in requirement on the skill of constructors, can greatly reduce unbalance loading errors under the heavy-load condition of a molten steel tank car, and improves the static weighing and metering precision of the rail weighbridge to be higher than the precision of a level meter.
It should be additionally noted that the weighing precision of a large-scale railroad scale has a great relationship with unbalance loading, the common method is to firstly ensure the installation levelness of the weighing sensors of the railroad scale, so that all the weighing sensors are positioned on the same horizontal plane, the water finding plane is very tedious work, the upper end faces of all the weighing sensor bases are connected together by drawing lines, and an integrated weighing platform (a combination of a weighing beam frame and a weighing rail) is theoretically placed on the weighing sensors by a level meter to find the height through a level meter, wherein the weighing platform is also a horizontal plane after the height is consistent, but in practice, the four corners of a weighing frame of the weighing platform, the weighing rails at the two ends of the weighing frame and each weighing sensor base are inconsistent due to gravity deformation, so that unbalance loading of the railroad scale can be caused; the steel water rail weighbridge of a steel mill usually only performs the horizontal alignment work of the installation elevation of a sensor, and no device performs unbalance loading adjustment, so that the weighing precision of the steel water rail weighbridge of the steel mill is not high; the traditional horizontal alignment process of the weighing sensor is omitted, and the offset load alignment is directly adopted, so that the adjustment time is saved, and the weighing precision is greatly improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional view taken along the line A-A of the present invention;
FIG. 3 is a sectional view taken along the direction B-B of the present invention.
In the figure: 1. a rail weighbridge foundation pit; 2. a load cell base; 3. a weighing sensor; 4. weighing a beam frame; 5. a longitudinal and transverse limiter; 6. a weighing rail; 7. a hydraulic lifting device; 8. and a weighing display instrument.
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.
Referring to fig. 1-3, the present invention provides a technical solution: the utility model provides a title platform formula track scale precision adjustment device, including track scale foundation ditch 1 and weighing display instrument 8, respectively be provided with a weighing sensor base 2 on track scale foundation ditch 1's the four corners, be provided with a weighing sensor 3 on every weighing sensor base 2, an integral rectangle title roof beam frame 4 is placed at four weighing sensor 3's top, the four corners of title roof beam frame 4 is supported by the weighing sensor of below, be provided with hydraulic lifting device 7 on the track scale foundation ditch 1 under title roof beam frame 4 four corners, the both sides top of title roof beam frame 4 is provided with weighing rail 6, be provided with in the title roof beam frame 4 and move about freely and freely stopper 5 and fix on track scale foundation ditch 1 through the support of moving about freely and freely the freely and freely stopper, weighing sensor 3 and weighing display instrument 8 electric connection.
When the weighing platform type rail weighbridge works, the calibration deviation of the weighing platform type weighbridge is large or the precision of the weighing platform type weighbridge is generally required to be adjusted again after maintenance, so that each weighing sensor is stressed uniformly, and the deviation of the weight borne by all weighing sensors does not exceed a certain value. The use steps of the weighing platform type rail weighbridge precision adjusting device are as follows:
s1, placing the heavy-duty steel tank car on a weighing platform, enabling each wheel shaft to be located at the center of a weighing rail of the weighing platform, namely, directly above two adjacent weighing sensors, and displaying the weight Wi (i is 1, 2, 3, n) of each weighing sensor on a display screen of the weighing controller;
s2, determining the minimum and maximum weights of Wi (i ═ 1, 2, 3,, n), i.e., Wmin ═ { Wi, (i ═ 1, 2, 3,, n) }, Wmax ═ { Wi, (i ═ 1, 2, 3,, n) }; if Wmax-Wmin < alpha (alpha is an allowable deviation value), the weighing platform type rail weighbridge does not need to be horizontally adjusted; otherwise, lifting one corner of the weighing platform where the Wmin corresponding to the weighing sensor is located through the hydraulic lifting device, adding an adjusting pad at the upper end of the weighing sensor, and resetting the hydraulic lifting device;
s3, repeating the step S2 until Wmax-Wmin < alpha is satisfied.
A precision adjusting device for a weighing platform type rail weighbridge is characterized in that the workload of horizontal alignment of the rail weighbridge is reduced to below 50% only after the fourth steel rolling general factory of Maanshan Steel works Limited, the static error of the molten steel weighing precision can be guaranteed to be within 1.5 per thousand for a long time, and the process requirement of three per thousand can be completely met.
The technical solution and the embodiments of the present invention will be further specifically described by way of examples with reference to the accompanying drawings. The utility model relates to a weighing platform type rail weighbridge precision adjusting device which is used for weighing and metering molten steel after tapping of a 300-ton converter, and the weighing platform type weighbridge precision adjusting device comprises the following basic parameters: maximum weighing range 700t, calibration tank 464.6 t. As shown in the first and second figures, the molten steel rail weighbridge adopts double weighing platforms, and each weighing platform comprises a rail weighbridge foundation pit 1, a weighing sensor base 2, a weighing sensor 3, a weighing beam frame 4, a longitudinal and transverse limiter 5, a weighing rail 6, a hydraulic lifting device 7 and a weighing display instrument 8.
The rail weighbridge foundation pit 1 is positioned below a foundation, and embedded parts are arranged at four corners of the foundation; the weighing sensor base 2 is fixed on an embedded part of the foundation pit 2; the weighing sensor 3 is arranged on the weighing sensor base 2; a weighing beam frame 4 is arranged above the weighing sensors 3, and four corners of the weighing beam frame 4 are respectively supported by the four weighing sensors 3; the longitudinal and transverse limiting device 5 is connected with the beam weighing frame 4 and limits the horizontal displacement of the beam weighing frame 4 within a reasonable range; the weighing rails 6 are fixed at two ends of the beam weighing frame 4 in parallel and are connected with the fixed steel rails through transition rails; a hydraulic lifting device 7 is arranged below four corners of the beam weighing frame 4 respectively and is fixed on an embedded part of the foundation pit 1; a certain gap is reserved between the upper end surface of the hydraulic lifting device 7 and the lower end surface of the beam weighing frame 4 in a reset state, and the hydraulic lifting device is used as an overload limiter of the weighing platform type rail weighbridge; the hydraulic upgrading device 7 is used as a tool for adjusting the elevation of the weighing sensor during jacking; the lead of the weighing sensor 3 is led into a weighing display instrument 8 through a junction box; the weight display 8 displays the real-time weight of each load cell 3.
After the maintenance of the converter campaign overhaul rail weighbridge, in order to meet the weighing precision, the unbalance loading amount of the rail weighbridge needs to be readjusted, and the method comprises the following steps:
s1, placing the steel tank car with the calibration tank on a weighing platform, enabling each wheel shaft to be located at the center of a weighing rail of the weighing platform, and displaying the weights W1, W2, W3 and W4 of four weighing sensors of one rail weighing platform by a weighing display instrument 8;
s2, judging the maximum value Wmax and the maximum value Wmin of the weights W1, W2, W3 and W4 of the four weighing sensors; if Wmax-Wmin is less than 200kg, the weighing platform type rail weighbridge does not need to be horizontally adjusted; otherwise, lifting one corner of the weighing platform where the Wmin corresponding to the weighing sensor is located through the hydraulic lifting device, adding an adjusting pad at the upper end of the weighing sensor, and resetting the hydraulic lifting device; (ii) a
S3, repeating the step S2 until Wmax-Wmin <200kg is satisfied.
In summary, the weighing platform type rail weighbridge precision adjusting device is simple to implement, small in workload and low in requirement on the skill of constructors, can greatly reduce unbalance loading errors under the heavy-load condition of a molten steel tank car, and effectively improves the static weighing and metering precision of the rail weighbridge.
It should be additionally noted that the weighing precision of a large-scale railroad scale has a great relationship with unbalance loading, the common method is to firstly ensure the installation levelness of the weighing sensors of the railroad scale, so that all the weighing sensors are positioned on the same horizontal plane, the water finding plane is very tedious work, the upper end faces of all the weighing sensor bases are connected together by drawing lines, and an integrated weighing platform (a combination of a weighing beam frame and a weighing rail) is theoretically placed on the weighing sensors by a level meter to find the height through a level meter, wherein the weighing platform is also a horizontal plane after the height is consistent, but in practice, the four corners of a weighing frame of the weighing platform, the weighing rails at the two ends of the weighing frame and each weighing sensor base are inconsistent due to gravity deformation, so that unbalance loading of the railroad scale can be caused; the molten steel rail weighbridge of a steel mill usually only performs horizontal alignment work of a sensor installation elevation and does not perform unbalance loading adjustment work, so that the weighing precision of the rail weighbridge of the steel mill is not high; the traditional horizontal alignment process of the weighing sensor is omitted, and the offset load alignment is directly adopted, so that the adjustment time is saved, and the weighing precision is greatly improved.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (1)
1. The utility model provides a weighing platform formula track scale accuracy adjustment device which characterized in that: comprises a rail weighbridge foundation pit (1) and a weighing display instrument (8), wherein four corners of the rail weighbridge foundation pit (1) are respectively provided with a weighing sensor base (2), each weighing sensor base (2) is provided with a weighing sensor (3), the tops of the four weighing sensors (3) are provided with an integral rectangular weighing beam frame (4), four corners of the beam weighing frame (4) are supported by weighing sensors below, a hydraulic lifting device (7) is arranged on the rail weighbridge foundation pit (1) right below the four corners of the beam weighing frame (4), weighing rails (6) are arranged above two sides of the beam weighing frame (4), longitudinal and transverse limiters (5) are arranged in the beam weighing frame (4) and are fixed on the rail weighbridge foundation pit (1) through brackets of the longitudinal and transverse limiters, and the weighing sensor (3) is electrically connected with the weighing display instrument (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122538079.1U CN215984831U (en) | 2021-10-21 | 2021-10-21 | Weighing platform type rail weighbridge precision adjusting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122538079.1U CN215984831U (en) | 2021-10-21 | 2021-10-21 | Weighing platform type rail weighbridge precision adjusting device |
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| Publication Number | Publication Date |
|---|---|
| CN215984831U true CN215984831U (en) | 2022-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122538079.1U Active CN215984831U (en) | 2021-10-21 | 2021-10-21 | Weighing platform type rail weighbridge precision adjusting device |
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2021
- 2021-10-21 CN CN202122538079.1U patent/CN215984831U/en active Active
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