Tundish scale verification system and method

Abstract

The invention provides a tundish scale verification system and a verification method thereof, and the technical scheme is as follows: a special weight is configured on a transverse fine adjustment mechanism of a tundish vehicle, a plurality of sets of verification tables are configured between the special weight and a base, and each verification table is arranged on a pressure equalizing bottom plate. Each calibration table is formed by sequentially connecting a hydraulic jack, a connecting block, a standard sensor and a pressure equalizing top plate, the hydraulic jacks are arranged in grooves of the pressure equalizing bottom plates, and the pressure equalizing top plates are fixedly connected with the special weights through screws. The tundish scale is calibrated through multiple sets of calibration tables, the tundish scale does not need to be disassembled in the calibration process, only the calibration equipment needs to be disassembled after calibration, any multi-point calibration in the measuring range of the tundish can be realized, and the calibration accuracy is improved. The system is simple in structure, easy to adjust, disassemble and assemble and convenient to maintain. The method can provide important reference value for tundish scale verification, and has important application and popularization value.

Description

Technical Field

[0001] The invention relates to the technical field of intermediate package scales, and in particular to an intermediate package scale calibration system and a calibration method thereof. Background Art

[0002] In the steel production industry, the mass of the continuous casting tundish (containing molten steel) is very large (>100t). The existing weighing methods of the tundish all use a tundish scale for weighing, such as Figure 1 As shown, the tundish scale currently used generally includes: a base, a tundish car base and a transverse fine-tuning mechanism. The base is provided with a left-right symmetrical tundish car base, and a transverse fine-tuning mechanism is provided on the upper side of the tundish car base. The transverse fine-tuning mechanism includes rollers, a pin-type weighing sensor and a mobile base. Rollers for left-right movement are respectively provided on both sides of the bottom of the mobile base, a pin-type weighing sensor is provided in the middle of the rollers, and a fixing groove for fixing the tundish is provided on the upper side of the mobile base. When weighing, the tundish (i.e., number 12 in the figure) is placed on the transverse fine-tuning mechanism, and the weight of the tundish is weighed by the pin-type weighing sensor in the transverse fine-tuning mechanism.

[0003] The tundish scale will cause a certain weighing error during long-term use, so it is necessary to calibrate the tundish scale at regular intervals to ensure its accuracy. In the prior art, multi-point calibration with weights is often used. During the calibration process, large-mass weights of various specifications need to be prepared, which is costly and requires repeated lifting during the construction process, which is very cumbersome. Due to structural limitations, it is impossible to install auxiliary structural parts such as gantry for calibration, and it is impossible to refer to the calibration method of weighing instruments such as hopper scales.

[0004] In order to solve the above problems, the present invention proposes a tundish scale calibration system. Summary of the invention

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art, meet practical needs, and provide a middle package scale calibration system to solve the above technical problems.

[0006] In order to achieve the purpose of the present invention, the technical scheme adopted by the present invention is: a tundish scale verification system, including a tundish scale and a tundish scale verification device, the tundish scale includes: a base, a tundish car base and a transverse fine-tuning mechanism, the transverse fine-tuning mechanism includes rollers, a pin-type weighing sensor and a mobile base, rollers for left and right movement are respectively arranged on both sides of the bottom of the mobile base, a pin-type weighing sensor is arranged in the middle of the roller, a fixing groove is arranged on the upper side of the mobile base, tundish car bases are symmetrically arranged on the left and right sides of the base, a transverse fine-tuning mechanism is arranged on the upper side of the tundish car base, the tundish scale verification device includes special weights, a pressure-equalizing bottom plate and a verification table, support columns are arranged on both sides of the special weights, the support columns are engaged in the fixing grooves, a verification table is arranged at the bottom of the special weights, the bottom of the verification table is a pressure-equalizing bottom plate, and a groove for fixing the verification table is arranged on the pressure-equalizing bottom plate.

[0007] Furthermore, the calibration bench includes a hydraulic jack, a connecting block, a standard sensor and a pressure-equalizing top plate. The bottom of the hydraulic jack is fixed in a groove on the pressure-equalizing bottom plate. The upper side of the hydraulic jack is fixedly connected with the connecting block, the standard sensor and the pressure-equalizing top plate in sequence. The upper side of the pressure-equalizing top plate is connected to the special weight by screws.

[0008] Furthermore, all standard sensors are connected to the first instrument via a junction box, and all pin-type weighing sensors are connected to the second instrument via wires. The standard sensors, the first instrument and the second instrument are all digital.

[0009] Furthermore, the verification tables are evenly arranged at the bottom of the special weights; and the number of the verification tables is greater than or equal to 2.

[0010] A method for verifying a tundish scale verification system, characterized by comprising the following steps:

[0011] S1: Clean up the on-site environment; lift the tundish off the tundish car base;

[0012] S2: The pressure equalizing bottom plate is fixedly installed on the base;

[0013] S3: several calibration tables are set on the pressure-equalizing bottom plate, special weights of appropriate weight are selected and fixedly installed on the calibration tables; both ends of the special weights are overlapped on the base of the tundish;

[0014] S4: Connect the standard sensors on each calibration table to a first meter through a junction box, connect the four pin-type weighing sensors to the second meter, and respectively connect the first meter and the second meter to power, wait for the internal circuit to stabilize, and then adjust the meter and the second meter to zero;

[0015] S5: Use a set of hydraulic systems to synchronously apply a certain load to the hydraulic jacks on each calibration platform; read the indications on the first instrument and the second instrument;

[0016] S6: If the indication on the first meter is the same as the indication on the second meter, it means that the pin-type weighing sensor works normally. If the indication on the first meter is different from the indication on the second meter, it is necessary to adjust the indication on the second meter on site.

[0017] S7: Repeat S4-S7. If the indication on the first instrument and the indication on the second instrument are the same after multiple measurements, stop the calibration.

[0018] S8: After the hydraulic system in the calibration table is depressurized, turn off the power supply, dismantle the calibration table, and lift off the special weights. The calibration of the tundish scale is completed.

[0019] The beneficial effects of the present invention are as follows: the present invention has a simple structure, and the weights only need to be hoisted once during the calibration process, the labor intensity is low, the calibration efficiency is high, any load within the measuring range can be loaded, and multi-point calibration within the measuring range can be achieved, the calibration accuracy is high, the calibration table is easy to disassemble and assemble, and maintenance is convenient, and it has wide practicality and versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the tundish scale;

[0021] Figure 2 It is the structural diagram of the middle package scale calibration system (three-dimensional);

[0022] Figure 3 This is the structural diagram of the middle package scale calibration system (front view);

[0023] Figure 4 This is a connection diagram of the standard sensor and instrument in the calibration system;

[0024] Figure 5 It is the calibration system for the intermediate package scale. DETAILED DESCRIPTION

[0025] The following is combined with Figure 1-5 The present invention is further described:

[0026] like Figure 1 and Figure 2As shown, a tundish scale verification system includes a tundish scale and a tundish scale verification device. The tundish scale includes: a base 1, a tundish car base 2 and a transverse fine-tuning mechanism 5. The transverse fine-tuning mechanism 5 includes a roller 3, a pin-type weighing sensor 4 and a mobile base. The bottom of the mobile base is respectively provided with rollers 3 for left and right movement on both sides, and the middle of the roller 3 is provided with a pin-type weighing sensor 4. The upper side of the mobile base is provided with a fixing groove. The tundish car base 2 is symmetrically provided on the left and right sides of the base 1, and the transverse fine-tuning mechanism 5 is provided on the upper side of the tundish car base 2. The tundish scale verification device includes a special weight 6, a pressure-equalizing bottom plate 7 and a verification table 8. Support columns are provided on both sides of the special weight 6, and the support columns are engaged in the fixing groove. The bottom of the special weight 6 is provided with a verification table 8. The bottom of the verification table 8 is a pressure-equalizing bottom plate 7, and the pressure-equalizing bottom plate 7 is provided with a groove for fixing the verification table 8.

[0027] Furthermore, the calibration bench 8 comprises a hydraulic jack 81, a connecting block 82, a standard sensor 83 and a pressure-equalizing top plate 84. The bottom of the hydraulic jack 81 is fixed in a groove on the pressure-equalizing bottom plate 7. The upper side of the hydraulic jack 81 is fixedly connected with the connecting block 82, the standard sensor 83 and the pressure-equalizing top plate 84 in sequence. The upper side of the pressure-equalizing top plate 84 is connected to the special weight 6 by screws.

[0028] Furthermore, all standard sensors 83 are connected to the first meter 10 via the junction box 9, and all pin-type weighing sensors 4 are connected to the second meter 11 via wires. The standard sensors 83, the first meter 10 and the second meter 11 are all digital.

[0029] Furthermore, the verification tables 8 are evenly arranged at the bottom of the special weights 6; and the number of the verification tables 8 is greater than or equal to 2.

[0030] A method for calibrating an intermediate package scale by a intermediate package scale calibration system comprises the following steps:

[0031] S1: Clean the on-site environment; hoist the tundish 12 from the tundish car base 2;

[0032] S2: Fixing the pressure equalizing bottom plate 7 on the base 1;

[0033] S3: several calibration tables 8 are arranged on the pressure-equalizing bottom plate, special weights 6 of appropriate weights are selected and fixedly installed on the calibration tables 8; both ends of the special weights 6 are overlapped on the base 2 of the tundish;

[0034] S4: Connect the standard sensor 83 on each calibration table 8 to a first meter 10 through a junction box 9, connect the four pin-type weighing sensors 4 to a second meter 11, and respectively connect the first meter 10 and the second meter 11 to power, wait for the internal circuit to stabilize, and then adjust the meter 10 and the second meter 11 to zero;

[0035] S5: Use a set of hydraulic systems to synchronously apply a certain load to the hydraulic jacks 81 on each test bench 8; read the indication on the first meter 10 and the indication on the second meter 11;

[0036] S6: If the indication on the first meter 10 is the same as the indication on the second meter 11, it means that the pin-type weighing sensor 4 works normally. If the indication on the first meter 10 is different from the indication on the second meter 11, it is necessary to adjust the indication on the second meter 11 on site;

[0037] S7: Repeat S4-S7. If the indication on the first meter 10 and the indication on the second meter 11 are the same after multiple measurements, stop the calibration;

[0038] S8: After the hydraulic system in the calibration table 8 is depressurized, the power supply is turned off, the calibration table 8 is dismantled, and the special weight 6 is lifted off, and the calibration of the tundish scale is completed.

Claims

1. A tundish weighing verification system, comprising a tundish weighing and a tundish weighing verification device, It is characterized in that The tundish scale comprises: a base (1), a tundish car base (2) and a transverse fine-tuning mechanism (5); the transverse fine-tuning mechanism (5) comprises a roller (3), a pin-type weighing sensor (4) and a movable base; rollers (3) for left and right movement are respectively arranged on both sides of the bottom of the movable base; a pin-type weighing sensor (4) is arranged in the middle of the roller (3); a fixing groove is arranged on the upper side of the movable base; and tundish car bases are symmetrically arranged on the left and right sides of the base (1). (2), a transverse fine-tuning mechanism (5) is arranged on the upper side of the tundish car base (2), the tundish scale calibration device comprises a special weight (6), a pressure equalizing bottom plate (7) and a calibration table (8), support columns are arranged on both sides of the special weight (6), the support columns are engaged in the fixing groove, a calibration table (8) is arranged at the bottom of the special weight (6), the bottom of the calibration table (8) is a pressure equalizing bottom plate (7), and a groove for fixing the calibration table (8) is arranged on the pressure equalizing bottom plate (7).

2. A tundish scale calibration system according to claim 1, It is characterized in that The test bench (8) comprises a hydraulic jack (81), a connection block (82), a standard sensor (83) and a pressure-equalizing top plate (84); the bottom of the hydraulic jack (81) is fixed in a groove on the pressure-equalizing bottom plate (7); the upper side of the hydraulic jack (81) is fixedly connected with the connection block (82), the standard sensor (83) and the pressure-equalizing top plate (84) in sequence; the upper side of the pressure-equalizing top plate (84) is connected to the special weight (6) by screws.

3. A tundish scale calibration system according to claim 2, It is characterized in that All standard sensors (83) are connected to the first meter (10) via a junction box (9), and all pin-type weighing sensors (4) are connected to the second meter (11) via wires. The standard sensors (83), the first meter (10) and the second meter (11) are all digital.

4. A tundish scale calibration system according to claim 3, It is characterized in that The test benches (8) are evenly arranged at the bottom of the special weights (6); the number of the test benches (8) is greater than or equal to 2.

5. A calibration method for a tundish scale calibration system according to any one of claims 1 to 4, Features The following steps are involved: S1: Cleaning the on-site environment; hoisting the tundish (12) from the tundish car base (2); S2: fixing a pressure equalizing bottom plate (7) on the base (1); S3: several test benches (8) are arranged on the pressure-equalizing bottom plate, special weights (6) of appropriate weight are selected and fixedly installed on the test benches (8); both ends of the special weights (6) are overlapped on the base (2) of the tundish; S4: Connect the standard sensor (83) on each calibration table (8) to a first meter (10) through a junction box (9), connect the four pin-type weighing sensors (4) to a second meter (11), and respectively connect the first meter (10) and the second meter (11) to power, wait for the internal circuit to stabilize, and then adjust the meter (10) and the second meter (11) to zero; S5: using a set of hydraulic systems to synchronously apply a certain load to the hydraulic jacks (81) on each of the test benches (8); reading the indication on the first meter (10) and the indication on the second meter (11); S6: If the value indicated on the first meter (10) is the same as the value indicated on the second meter (11), it means that the pin-type weighing sensor (4) is working normally; if the value indicated on the first meter (10) is different from the value indicated on the second meter (11), it is necessary to adjust the value indicated on the second meter (11) on site; S7: Repeat S4-S7, and if the value indicated on the first meter (10) and the value indicated on the second meter (11) are the same after multiple measurements, then stop the calibration; S8: After the hydraulic system in the calibration table (8) is depressurized, the power supply is turned off, the calibration table (8) is removed, and the special weight (6) is lifted off, and the calibration of the tundish scale is completed.

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