Novel high-temperature-resistant bale electronic scale

Abstract

The utility model discloses a novel high-temperature-resistant bale electronic scale, which comprises a bearing beam for placing a steel ladle lug, a bridge-type sensor is arranged below the bearing beam, a double-arc loading head is arranged between the bridge-type sensor and the bearing beam, and a base is arranged below the bridge-type sensor. The steel ladle is positioned through cooperation of external limiting and internal limiting, meanwhile, lateral limiting is separated from a lower structure, it is guaranteed that weighing is not affected by external force, the loading center of the double-arc surface of the sensor is always kept at the symmetric center position of a curved surface, the loading state is stable, and the situation that the sensor outputs unbalance loading is avoided; the overall weighing precision of the weighing box is fundamentally improved.

Description

Technical Field

[0001] The utility model relates to the technical field of measurement, in particular to a novel high-temperature resistant large-package electronic scale. Background Art

[0002] With the development of production technology, domestic steel mills have an increasingly urgent need for electronic scales for steel and iron ladle tanks. They hope that the steel (iron) ladle tanks can complete the weight measurement of high-temperature steel (iron) water online while completing the transportation and continuous casting work on transportation vehicles, ladle turntables and other equipment, and conveniently realize the data collection and process control of input, output, material level, etc., so as to simplify the process flow, improve product quality, reduce labor intensity, and meet the requirements of economic assessment.

[0003] In the modern steelmaking process, continuous casting is a very important process, and the electronic scale of the ladle turret has the following functions in the continuous casting process: 1. Monitor the descent of molten steel during ladle casting and control the flow rate when necessary; 2. Forecast the remaining amount of molten steel before the end of casting, close the steel outlet in time, and prevent the slag from flowing out. It can be seen that the electronic scale of the ladle turret has become an indispensable part of continuous casting production equipment.

[0004] Data show that, due to certain improvements in the structure of large ladles according to production needs, more V-shaped rotating ear ladles have appeared. The loading surface of this type of ladle is shorter and wider, which is completely different from the commonly used long strip ladles with longer ear seat and narrower loading surface. Conventional electronic scales lack a corresponding reasonable ladle electronic scale structure designed for this type of ladle.

[0005] Chinese patent document CN201231303Y discloses an "electronic scale for ladle turntable". The weighing device structure used is: two high-temperature resistant sensors are installed on a base plate, and a load-bearing beam is placed on the loading surface of the sensor head to support the ladle lug seat. The sensor side is protected by a steel plate to prevent high-temperature radiation and splashing of molten steel. The sensor is connected to the base plate and the load-bearing beam with high-strength screws to form a weighing box. A weighing box needs to be installed on each cantilever of the ladle turntable. Two weighing boxes on the same side form an electronic scale. The above technical solution cannot accurately weigh the ladle with V-shaped rotating ears. Summary of the invention

[0006] The utility model mainly solves the technical problem that the original technical scheme cannot accurately weigh the ladle with V-shaped rotating lifting ears, and provides a new type of high-temperature resistant large-ladle electronic scale. The above technical scheme realizes the positioning of the ladle through the cooperation of external limit and internal limit, and at the same time, the lateral limit is separated from the lower structure to ensure that the weighing is not affected by external force. The loading center of the double arc surface of the sensor is always maintained at the symmetrical center position of the curved surface. The loading state is stable, which avoids the situation of unbalanced load of the sensor output, and fundamentally improves the overall weighing accuracy of the weighing box.

[0007] The above technical problems of the utility model are mainly solved by the following technical solutions: the utility model includes a load-bearing beam for placing the ladle ear seat, a bridge sensor is provided below the load-bearing beam, a double arc loading head is provided between the bridge sensor and the load-bearing beam, and a base is provided below the bridge sensor. The positioning of the ladle is achieved by the cooperation of the external limit and the internal limit, while the lateral limit is separated from the lower structure to ensure that the weighing is not affected by external forces, the loading center of the double arc surface of the sensor is always maintained at the symmetrical center position of the curved surface, the loading state is stable, the situation of the sensor outputting an unbalanced load is avoided, and the overall weighing accuracy of the weighing box is fundamentally improved.

[0008] Preferably, external limits are provided above both sides of the load-bearing beam, and the external limits are symmetrically arranged along the load-bearing beam. The V-shaped ear seat falls into the position of the weighing box through the external limit, and the ear seat is finally separated from the external limit through the internal limit on the load-bearing beam, and leans on the internal limit, which can eliminate the influence of external forces and improve accuracy. The contact surface between the load-bearing beam and the bottom surface of the ladle ear seat is a wide large plane, so it forms an inverted triangle stable structure with the loading surface of the sensor below, and because the force position of the sensor loading contact surface is very stable, the output accuracy and stability of the sensor are very high.

[0009] Preferably, the load-bearing beam is provided with an internal limiter, and the external limiters are symmetrically arranged along the load-bearing beam, and the internal limiter spacing is smaller than the external limiter spacing. The internal limiter on the load-bearing beam allows the ear seat to eventually separate from the external limiter and lean against the internal limiter, which can eliminate the influence of external forces and improve accuracy.

[0010] Preferably, the double arc loading head is rigidly connected to the load-bearing beam, the double arc loading head is saddle-shaped, and the front and side surfaces are circumscribed arc surfaces. The double arcs on the loading pressure head fit with the double arcs on the sensor to form a stable bonding surface.

[0011] Preferably, the bridge sensor is rigidly connected to the base, and the bridge sensor is saddle-shaped with opposite angles, and is nested with a double arc loading head. The sensor has two circumscribed arc surfaces in the length direction and the width direction, similar to a saddle-shaped structure. Under the action of gravity, the loading points in the length direction and the width direction will fall on two vertical and circumscribed arcs, and have the function of automatic reset when the plane is vertically loaded. This loading structure ensures that even if there is a certain angle deviation of the load-bearing beam, its loading center is still maintained at the center of the arc surface, which has very good loading stability for the sensor, eliminates the influence of eccentric loading, and improves weighing accuracy.

[0012] Preferably, lateral limits are arranged in parallel on both sides of the bridge sensor, and the bridge sensor abuts against the limit bolts that vertically penetrate the lateral limits. In the free state, the load-bearing beam can freely deflect to a certain angle, and the gap is controlled by the limit bolts, so that the deflection angle of the large bag scale can be controlled within a very small range; during loading, the load-bearing beam is pressed straight and flat due to the vertical pressure of the large bag, and the lateral limiter is disengaged at this time to ensure that the weighing accuracy is not affected. The lateral limit can be used to control the rotation angle of the load-bearing beam in the free state within a reasonable range. After loading, since the loading surface of the ladle is horizontal, the load-bearing beam will fit with the bottom surface of the ladle ear seat and become horizontal, and the lateral limit will be disengaged, thereby ensuring accuracy.

[0013] Preferably, an anti-warping limit plate is provided between the sensor and the base. In case of an accidental impact, the load-bearing beam is tilted. The anti-warping limit plate extends under the sensor. When the load-bearing beam tilts, the sensor itself is used to pull the load-bearing beam so that the load-bearing beam can only tilt a very small distance. After the impact is eliminated, the load-bearing beam returns to its original position due to gravity.

[0014] The beneficial effects of the utility model are:

[0015] 1. The load-bearing beam can be equipped with an internal limiter. During normal weighing, the ear seat is separated from the external limiter to ensure weighing accuracy.

[0016] 2. During normal weighing, the lateral limiter is separated from the lower structure to ensure that the weighing is not affected by external forces.

[0017] 3. The loading center of the double arc surface of the sensor always remains at the symmetrical center position of the curved surface even when the load-bearing beam deflects a small angle. The loading state is stable, avoiding the situation of sensor output eccentricity, and fundamentally improving the overall weighing accuracy of the weighing box.

[0018] 4. The anti-warping limit design is simple and reliable, which can prevent warping under accidental impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front structural schematic diagram of the utility model.

[0020] Figure 2 It is a side structural schematic diagram of the utility model.

[0021] Figure 3 It is a schematic diagram of a lateral limiting structure of the utility model.

[0022] Figure 4 This is a schematic diagram of a front sensor loading structure of the utility model.

[0023] Figure 5 The utility model is a schematic diagram of a side sensor loading structure.

[0024] Figure 6 It is a loading force analysis diagram of the utility model.

[0025] Figure 7 The utility model is a structural schematic diagram of a V-shaped ladle ear seat.

[0026] Figure 8 The utility model discloses a structural diagram of a load-bearing beam loading type weighing box.

[0027] Fig. 9 The utility model discloses a structural diagram of a guide column and guide sleeve loading type weighing box.

[0028] In the figure, 1 is the ladle ear seat, 2 is the load-bearing beam, 3 is the double arc loading head, 4 is the bridge sensor, 5 is the base, 6 is the lateral limit, 7 is the limit bolt, 8 is the anti-warping limit, 9 is the external limit, 10 is the arc loading surface of the loading head, and 11 is the arc loading surface of the sensor. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the technical solution of the present invention is further described in detail below through embodiments and in combination with the accompanying drawings. It should be understood that the specific implementation method described here is only an optimal embodiment of the present invention, which is only used to explain the present invention and does not limit the scope of protection of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0030] Before discussing the exemplary embodiments in more detail, it should be mentioned that some exemplary embodiments are described as processes or methods depicted as flow charts. Although the flow charts describe the operations (or steps) as sequential processes, many of the operations (or steps) therein can be implemented in parallel, concurrently, or simultaneously. In addition, the order of the operations can be rearranged. The process can be terminated when its operation is completed, but can also have additional steps not included in the drawings; the process can correspond to a method, function, procedure, subroutine, subprogram, etc.

[0031] The technical solution of the utility model is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0032] Embodiment: A novel high temperature resistant large package electronic scale of this embodiment, such as Figure 1 , Figure 2 As shown, it includes a load-bearing beam for placing the ladle ear seat 1, a bridge sensor 4 is provided below the load-bearing beam 2, a double arc loading head 3 is provided between the bridge sensor and the load-bearing beam, and a base 5 is provided below the bridge sensor. The positioning of the ladle is achieved by the cooperation of the external limit and the internal limit, while the lateral limit is separated from the lower structure to ensure that the weighing is not affected by external forces, the loading center of the double arc surface of the sensor is always maintained at the symmetrical center position of the curved surface, the loading state is stable, the situation of sensor outputting eccentric load is avoided, and the overall weighing accuracy of the weighing box is fundamentally improved.

[0033] External limits are provided above both sides of the load-bearing beam, and the external limits are symmetrically arranged along the load-bearing beam. Internal limits are provided on the load-bearing beam, and the external limits are symmetrically arranged along the load-bearing beam, and the internal limit spacing is smaller than the external limit spacing. The V-shaped ear seat falls into the weighing box position through the external limit, and the ear seat is finally separated from the external limit through the internal limit on the load-bearing beam, and leans on the internal limit, which can eliminate the influence of external force and improve accuracy. The contact surface between the load-bearing beam and the bottom surface of the ladle ear seat is a wide large plane, so it forms a stable inverted triangle structure with the loading surface of the sensor below, and because the force position of the sensor loading contact surface is very stable, the output accuracy and stability of the sensor are very high.

[0034] like Figure 4 , Figure 5 As shown, the double arc loading head 3 is rigidly connected to the load-bearing beam 2. The double arc loading head is saddle-shaped, and the front and side surfaces are circumscribed arc surfaces. The bridge sensor is rigidly connected to the base. The bridge sensor is saddle-shaped with opposite angles. The arc loading surface 10 of the loading head is consistent with the arc loading surface 11 of the sensor. The bridge sensor is nested with the double arc loading head 3. The double arc on the loading pressure head fits with the double arc on the sensor to form a stable bonding surface. The bridge sensor is symmetrically arranged along the load-bearing beam 2 to ensure that the ladle ear seat remains stable after being placed to avoid shaking.

[0035] The sensor has two circumscribed arc surfaces in the length and width directions, similar to a saddle-type structure. Under the action of gravity, the loading points in the length and width directions will fall on two vertical and circumscribed arcs, and it has the function of automatically resetting when the plane is loaded vertically. This loading structure ensures that even if there is a certain angle deviation of the load-bearing beam, its loading center remains at the center of the arc surface, which has very good loading stability for the sensor, eliminates the impact of eccentric loading, and improves weighing accuracy.

[0036] like Figure 3As shown, lateral limits 6 are provided on both sides of the bridge sensor, and the bridge sensor 4 is in contact with the limit bolts 7 that vertically penetrate the lateral limits. In the free state, the load-bearing beam can freely deflect to a certain angle. By controlling the gap through the limit bolts, the deflection angle of the large bag scale can be controlled within a very small range; during loading, the load-bearing beam is pressed straight and flat due to the vertical pressure of the large bag. At this time, the lateral limiter is disengaged to ensure that the weighing accuracy is not affected. The lateral limit can be used to control the rotation angle of the load-bearing beam in the free state within a reasonable range. After loading, since the loading surface of the ladle is horizontal, the load-bearing beam will fit with the bottom surface of the ladle ear seat and become horizontal, and the lateral limit will be disengaged, thereby ensuring accuracy.

[0037] An anti-warping limit plate 8 is provided between the bridge sensor 4 and the base 5. In case of an accidental impact, the load-bearing beam is tilted. The anti-warping limit plate extends under the sensor. When the load-bearing beam tilts, the sensor itself is used to pull the load-bearing beam so that the load-bearing beam can only tilt a very small distance. After the impact is eliminated, the load-bearing beam returns to its original position due to gravity.

[0038] At present, due to the improvement of the structure of large ladle according to production needs, there are more V-shaped rotating ear ladles. The loading surface of this ladle is shorter and wider, which is completely different from the long strip ear seat with longer length and narrower width that we used to use. Therefore, we design a corresponding and reasonable ladle electronic scale structure for this ladle. Figure 7 The following is a structural dimension drawing of this type of ladle ear.

[0039] At present, the commonly used large-package electronic scales are of two types: load-bearing beam loading weighing box structure and guide column and guide sleeve loading weighing box structure. The basic structure is as follows Figure 8 , Fig. 9 shown.

[0040] The load-bearing beam loading weighing box includes: 1. a pressure head, 2. a load-bearing beam, 3. a bridge sensor, and 4. a bottom plate.

[0041] The guide post and guide sleeve loading weighing box includes: 1. box body, 2. pressure rod, 3. guide sleeve, 4. sensor.

[0042] The above two weighing boxes have obvious disadvantages when it comes to the ladle ear seat form targeted by this project: the former has too long a sensor itself, and the center distance of the pressure head cannot be controlled within the length range of the bottom surface of the ear seat; and the sensor is bolted and the loading plane is large, so the loading point and the bolt tightening torque may change during use, which will significantly affect the output of the weighing value and reduce the accuracy; the latter cannot make an internal limit, which causes the ladle ear seat to easily rub against the external limiter, which will cause a large weighing error. Therefore, we need a large ladle electronic scale with a new loading structure to perfectly solve the weighing problem of this type of ladle.

[0043] The present application is combined with a large ladle electronic scale loaded with a saddle-type load-bearing beam structure. This structure can cleverly solve some of the problems in weighing the above-mentioned ladle and improve the weighing accuracy and reliability.

[0044] The overall structure of the weighing box consists of a load-bearing beam, a double arc loading pressure head, a sensor, a base, a lateral limiter, a limit bolt, an anti-warping limiter, etc.

[0045] Its working principle is that the V-shaped ear seat falls into the weighing box position through the external limit, and the ear seat is finally separated from the external limit through the internal limit on the load-bearing beam, and leans on the internal limit, which can eliminate the influence of external forces and improve accuracy. The contact surface between the load-bearing beam and the bottom surface of the ladle ear seat is a wide large plane, so it forms an inverted triangle stable structure with the loading surface of the sensor below, and because the force position of the sensor loading contact surface is very stable, the output accuracy and stability of the sensor are very high.

[0046] In addition, the lateral limit can be used to control the rotation angle of the load-bearing beam in the free state within a reasonable range. After loading, since the loading surface of the ladle is horizontal, the load-bearing beam will fit with the bottom surface of the ladle ear seat and become horizontal, and the lateral limit will be disengaged, thereby ensuring accuracy.

[0047] The double arcs on the loading pressure head and the double arcs on the sensor fit each other to form a stable bonding surface.

[0048] The loading form between the load-bearing beam and the ladle lug is as follows: Figure 1 , Figure 2 As shown in the figure, the V-shaped ear seat falls into the weighing box through the external limit, and the ear seat is finally separated from the external limit through the internal limit on the load-bearing beam and leans on the internal limit, which can eliminate the influence of external forces and improve accuracy. The contact surface between the load-bearing beam and the bottom surface of the ladle ear seat is a wide large plane, so that the ear seat is evenly loaded on the load-bearing beam.

[0049] like Figure 4 , Figure 5 As shown in the figure, the electronic scale sensor pressure head adopts a specially designed double arc surface tightly fitting loading structure. There are two circumscribed arc surfaces in the length direction and width direction of the sensor, similar to the saddle structure. Under the action of gravity, the loading points in the length direction and width direction will fall on two vertical and circumscribed arcs, and it has the function of automatic reset when the plane is loaded vertically. This loading structure ensures that even if there is a certain angle deviation of the load-bearing beam, its loading center still remains in the center of the arc surface, which has very good loading stability for the sensor, eliminates the influence of eccentric loading, and improves weighing accuracy.

[0050] like Figure 6As shown in the figure, when the weighing box is loaded, the bottom surface of the large ladle ear seat contacts the large plane above the load-bearing beam, and the vertical downward force is evenly distributed. In the length direction, the load-bearing beam and the two sensor loading points form a stable simply supported beam with uniform force support structure; in the width direction, it forms an inverted triangle uniform force structure with the sensor. Considering that the sensor pressure head has the self-reset characteristic when subjected to vertical pressure, such a structural design ensures the stability of the force and orientation of the load-bearing beam when the ladle is loaded.

[0051] The structure of the large bag scale of the present application has the following characteristics: in the free state, the load-bearing beam can freely deflect to a certain angle, and the gap can be controlled by the limit bolts, so that the deflection angle of the large bag scale can be controlled within a very small range; when loading, the load-bearing beam is pressed straight and flat due to the vertical pressure of the large bag, and the lateral limiter is disengaged at this time to ensure that the weighing accuracy is not affected. In order to prevent the load-bearing beam from tilting in the event of an accidental impact, the anti-tilting limit plate extends under the sensor, and the sensor itself is used to pull the load-bearing beam when it tilts, so that the load-bearing beam can only tilt a very small distance. After the impact is eliminated, the load-bearing beam returns to its original position due to the action of gravity.

[0052] The basic requirements for the 300t large bag electronic scale developed for a certain project are as follows:

[0053]

[0054] Large package electronic scale structure see Figure 1 , Figure 2 The large ladle ears are located above the load-bearing beam, with uniform force, and the internal limit on the load-bearing beam ensures that the ladle is separated from the external limit. Under the positive pressure, the plane of the load-bearing beam is guaranteed to be horizontal, and the lateral limit bolts remain separated; combined with the structural stability characteristics analyzed above, this new large ladle electronic scale can achieve good results in actual use, fully meet the use requirements of this type of ladle electronic scale, and make up for the shortcomings of the other two forms of large ladle scales.

[0055] Its main advantages are:

[0056] 1. The load-bearing beam can be equipped with an internal limiter. During normal weighing, the ear seat is separated from the external limiter to ensure weighing accuracy.

[0057] 2. During normal weighing, the lateral limiter is separated from the lower structure to ensure that the weighing is not affected by external forces.

[0058] 3. The loading center of the double arc surface of the sensor always remains at the symmetrical center position of the curved surface even when the load-bearing beam deflects a small angle. The loading state is stable, avoiding the situation of sensor output eccentricity, and fundamentally improving the overall weighing accuracy of the weighing box.

[0059] 4. The anti-warping limit design is simple and reliable, which can prevent warping under accidental impact.

[0060] A person of ordinary skill in the art can understand that all or part of the steps in the various methods of the above embodiments can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium, and the storage medium may include: a read-only memory (ROM), a random access memory (RAM), a disk or an optical disk, etc.

[0061] The specific embodiments described herein are merely examples of the spirit of the present invention. The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that technicians in the technical field to which the present invention belongs can make various modifications or supplements to the described specific embodiments or replace them in a similar manner, but will not deviate from the spirit of the present invention or exceed the scope defined in the attached claims. For ordinary technicians in this field, multiple deformations and improvements can also be made without departing from the concept of the present invention. Therefore, the scope of protection of the patent of the present invention shall be based on the attached claims.

Claims

1. A new type of high temperature resistant large bag electronic scale, characterized in that: It comprises a load-bearing beam (2) on which a ladle ear seat (1) is placed, a bridge sensor (4) is provided below the load-bearing beam (2), a double-arc loading head (3) is provided between the bridge sensor (4) and the load-bearing beam (2), and a base (5) is provided below the bridge sensor (4).

2. A new type of high temperature resistant large bag electronic scale according to claim 1, characterized in that: External limiters (9) are provided above both sides of the load-bearing beam (2), and the external limiters are symmetrically arranged along the load-bearing beam (2).

3. A new type of high temperature resistant large bag electronic scale according to claim 2, characterized in that: The load-bearing beam (2) is provided with an internal limiter, and the external limiters (9) are symmetrically arranged along the load-bearing beam (2), and the internal limiter spacing is smaller than the external limiter spacing.

4. A new type of high temperature resistant large bag electronic scale according to claim 1, characterized in that: The double-arc loading head (3) is rigidly connected to the load-bearing beam (2); the double-arc loading head (3) is saddle-shaped, and the front and side surfaces are circumscribed arc surfaces.

5. A new type of high temperature resistant large bag electronic scale according to claim 4, characterized in that: The bridge sensor (4) is rigidly connected to the base (5); the bridge sensor (4) is saddle-shaped with opposite angles and is nested with the double-arc loading head (3).

6. A novel high temperature resistant large bag electronic scale according to claim 1, characterized in that: Lateral limiters (6) are arranged in parallel on both sides of the bridge sensor (4).

7. A novel high temperature resistant large bag electronic scale according to claim 6, characterized in that: Limit bolts (7) vertically penetrating the lateral limit (6) are provided on both sides of the bridge sensor (4), and the bridge sensor (4) is in abutment with one end of the limit bolts (7).

8. A novel high temperature resistant large bag electronic scale according to claim 1, 5 or 6, characterized in that: An anti-warping limiter (8) is provided between the sensor (4) and the base (5).

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