Continuous casting billet barrier-free hidden weighing device and its usage method

Abstract

The present invention discloses a barrier-free hidden weighing device for continuous casting steel billets and a method for using the same. The weighing device comprises at least two horizontally spaced main beams (1), a plurality of roller beams (2) mounted on the main beams, a plurality of rollers (3) mounted on the roller beams for transporting steel billets, and a roller beam suspension device (4). The beneficial effect of the present invention is that after the entire weighing device is installed, it is on the same horizontal plane as the original conveying rollers at the continuous casting site, and the conveying rollers remain unchanged, which will not affect the on-site operation. The billets are directly transported to the weighing device after being cut by a fire cutting machine. The weighing device is an integral rigid hanging structure, does not require hydraulic lifting, and weighing can be completed in 10 seconds. While ensuring high efficiency and high precision weighing, it can also save a considerable amount of use cost for the enterprise.

Description

Technical Field

[0001] The invention relates to a high-precision process electronic weighing device in a continuous casting production process of the metallurgical industry, and in particular to an obstacle-free hidden weighing device for a continuous casting steel billet and a use method thereof. Background Art

[0002] The last step of the continuous casting process is to cut the continuous and uninterrupted steel billets to a fixed length online. However, due to the factors that affect the product size and density, such as the wear of the crystallizer, the different molten steel pressure and the pulling speed, the weights of the same length of continuous casting billets cast at different times in the same continuous casting flow are different, and there is a large difference. The existence of this difference makes it impossible to control the weight of the raw materials when the continuous casting billets are rolled in the next rolling process, resulting in the billets being either too short or too long as the raw materials, which directly affects the rolling yield rate and has an impact on the economic benefits and production efficiency of the enterprise that cannot be underestimated.

[0003] Data show that, based on an annual output of 1 million tons, if the qualified rate of weighing accuracy increases by 1‰ by 10%, the direct economic benefits will increase by more than 2 million yuan per year; if the weighing accuracy increases by 1‰, the direct economic benefits will increase by more than 2 million yuan per year, and vice versa. For enterprises with average weighing accuracy: an annual output of 3 million tons of steel can achieve an annual comprehensive increase of about 20 million yuan through weighing transformation.

[0004] For example, Chinese utility model patent publication number CN207043296U discloses a continuous casting billet fixed weight cutting weighing device, including a gantry fixed bracket, a weighing frame located above the gantry fixed bracket, a plurality of weighing billet hanging frames are horizontally installed inside the gantry fixed bracket, the top of the weighing billet hanging frame is tightly connected to the hydraulic rod, the hydraulic rod passes through the gantry fixed bracket and the weighing frame and is connected to the hydraulic cylinder, the hydraulic cylinder is rigidly installed on the top of the weighing frame, two weighing devices are installed on both sides of the top of the gantry fixed bracket, the weighing frame is placed on the weighing device, and a billet guide rail is installed on the vertical side of the bottom of the gantry fixed bracket. This device requires the installation of a gantry fixed bracket, occupies a large area, and does not take into account the adverse effects of longitudinal impact and external lateral horizontal impact on measurement accuracy.

[0005] Another example is the Chinese utility model patent CN204405156U, which discloses a new type of online weighing electronic scale for continuous casting steel billets, including two weighing sensors, each of which is connected to a hydraulic rod at the upper end, and each of which is connected to the upper part of a weighing platform at the lower end, and a lifting ring is connected to the lower part of the weighing platform. It also takes up a large space and does not take into account the influence of longitudinal impact and external lateral impact. Summary of the invention

[0006] The technical problem to be solved by the present invention is that the installation of the existing on-line weighing device for continuous casting billets causes great changes to the site and hinders on-site operation during the later use. Therefore, a barrier-free hidden weighing device for continuous casting billets and its use method are provided.

[0007] The technical solution of the present invention is: a barrier-free hidden weighing device for continuous casting billets, which includes at least two main crossbeams horizontally distributed at intervals, several roller track beams erected on the main crossbeams, several roller wheels installed on the roller track beams for transporting billets, and also includes a roller track beam suspension device. The roller track beam suspension device includes a long shaft radially passing through the roller track beam and in clearance fit with the roller track beam. Below the long shaft, there is a short shaft parallel to the long shaft and with the same vertical center line. There are two roller track beam fixing seats symmetrically distributed about the center on the short shaft for supporting the roller track beam and having their bottoms in contact with the main crossbeam. The bottom of the roller track beam fixing seat is provided with an arched opening groove for accommodating the short shaft. Both ends of the short shaft are sleeved with hanging plates. Both ends of the long shaft extend outwards to form cylindrical contraction parts. The tops of the hanging plates are sleeved on the cylindrical contraction parts. The two ends of the cylindrical contraction parts are respectively placed on sensor bearing seats. The bottom of the sensor bearing seat is fixed with a weighing sensor in contact with the main crossbeam.

[0008] In the above solution, the roller wheels are divided into several groups along the length direction of the roller track beam, and each group of roller wheels is driven by a belt to be connected with a corresponding motor located below the roller track beam.

[0009] An improvement to the above solution is that inwardly curved guide plates are respectively provided on both side walls of the roller track beam.

[0010] A further improvement to the above solution is that a platform mesh plate fixedly connected with the main crossbeam is provided between two adjacent roller track beams.

[0011] A further improvement to the above solution is that cooling water passes through the main crossbeam.

[0012] For the use method of the barrier-free hidden weighing device for continuous casting billets, after the billet is fed onto the roller track beam, the motor drives the roller wheels to roll, driving the billet to move forward. The weights of the roller track beam and the billet are transmitted to the roller track beam fixing seat. The roller track beam fixing seat transmits the gravity to the short shaft. The short shaft transmits the gravity to the cylindrical contraction part through the hanging plate. The cylindrical contraction part transmits the gravity to the sensor bearing seat. The top of the sensor bearing seat is provided with an arched opening groove for bearing the cylindrical contraction part. The sensor bearing seat finally transmits the gravity to the weighing sensor for weighing.

[0013] The beneficial effects of the present invention are as follows: After the entire weighing device is installed, it is on the same horizontal plane as the original conveying roller table at the continuous casting site, and the conveying roller table remains unchanged, without affecting the on-site operation. The billet is directly transported to the weighing device after being cut by the flame cutting machine. The weighing device is of an integral rigid hanging structure, without the need for hydraulic lifting, and the weighing can be completed in 10 seconds. While ensuring high-efficiency and high-precision weighing, it can also save considerable usage costs for the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of the present invention;

[0015] Figure 2 is Figure 1 a side view of

[0016] Figure 3 is Figure 2 a top view of

[0017] Figure 4 is Figure 1 a schematic diagram of the roller table beam suspension device in

[0018] Figure 5 is Figure 4 a side view of

[0019] In the figure, 1, main cross beam; 2, roller table beam; 3, roller; 4, roller table beam suspension device; 41, long shaft; 42, short shaft; 43, roller table beam fixing seat; 44, arched opening groove; 45, hanging plate; 46, cylindrical contraction part; 47, sensor bearing seat; 5, weighing sensor; 6, guide plate; 7, platform mesh plate; 8, motor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

[0021] Embodiment 1: As Figures 1-5As shown, the present invention includes at least two main beams 1 distributed horizontally at intervals, a plurality of roller beams 2 erected on the main beams, a plurality of roller wheels 3 installed on the roller beams for transporting steel billets, and a roller beam suspension device 4, wherein the roller beam suspension device includes a long axis 41 radially passing through the roller beam and having a clearance fit with the roller beam, a short axis 42 parallel to the long axis and coinciding with the mid-vertical line is provided below the long axis, two roller beam fixing seats 43 for supporting the roller beam and in contact with the main beam at the bottom are symmetrically distributed on the short axis about the center, an arched opening groove 44 for accommodating the short axis is provided at the bottom of the roller beam fixing seat, a hanging plate 45 is provided at both ends of the short axis, a cylindrical contraction portion 46 is extended outward from both ends of the long axis, the top of the hanging plate is provided on the cylindrical contraction portion, the two ends of the cylindrical contraction portion are respectively placed on a sensor bearing seat 47, and a weighing sensor 5 in contact with the main beam is fixed at the bottom of the sensor bearing seat.

[0022] Example 2: Figure 2 As shown, the rollers are divided into two groups along the length direction of the roller beam, each group of rollers includes 5 rollers, and the 5 rollers can be divided into the front 3 rollers and the rear 2 rollers. The front 3 rollers are connected to the motor 8 located below the roller beam through belts, and the rear 2 rollers are connected to the motor through belts. The other group of rollers is also arranged and driven in the same way.

[0023] Embodiment 3: In order to prevent the steel billet from deflecting on the roller beam, guide plates 6 bent inwards are respectively provided on both side walls of the roller beam to ensure that the steel billet always moves forward in the center of the roller beam.

[0024] Embodiment 4: In order to facilitate maintenance operations, a platform mesh plate 7 fixedly connected to the main cross beam is provided between two adjacent roller beams.

[0025] Embodiment 5: The weighing sensor is installed on the main beam with cooling water, which can effectively cool the sensor and avoid the influence of high temperature radiation on the weighing accuracy.

[0026] The above embodiments can be combined as needed, and the obtained technical solutions are all within the protection scope of the present invention as long as they do not conflict. The present invention only lists the example of a single-hanging roller beam suspension device, and can also include a double-hanging type and other hanging forms. According to the different hanging forms of the roller beam suspension device, different shapes of weighing sensors are used.

[0027] The usage method of the present invention is as follows: After the steel billet is fed onto the roller table beam, the motor drives the roller wheels to roll, driving the steel billet forward. The weights of the roller table beam and the steel billet are transmitted to the roller table beam fixing seat, and the roller table beam fixing seat transmits the gravity to the short shaft. The short shaft transmits the gravity to the cylindrical contraction part through the hanging plate, and the cylindrical contraction part transmits the gravity to the sensor bearing seat. An arched opening groove is provided at the top of the sensor bearing seat for bearing the cylindrical contraction part, and the sensor bearing seat finally transmits the gravity to the weighing sensor for weighing. The unique design of the roller table beam suspension device enables the entire weighing device to have 4 degrees of freedom in the horizontal direction, and can ensure that the measured weight is accurately transmitted to the weighing sensor under the influence of heat deformation of the weighing body or other external forces, ensuring the weighing accuracy. The 4 degrees of freedom mentioned here refer to that the hanging plate can swing back and forth around the cylindrical contraction part, and the cylindrical contraction part can move left and right along the radial direction of the roller table beam, without affecting the normal measurement of the weighing sensor.

Claims

1. A barrier-free hidden weighing device for continuous casting steel billets, comprising at least two main beams (1) arranged at intervals in a horizontal direction, a plurality of roller beams (2) erected on the main beams, and a plurality of rollers (3) installed on the roller beams for transporting steel billets. Its characteristics are: It also includes a roller beam suspension device (4), the roller beam suspension device including a long axis (41) radially passing through the roller beam and having a clearance fit with the roller beam, a short axis (42) parallel to the long axis and coinciding with the mid-vertical line of the long axis is provided below the long axis, two roller beam fixing seats (43) for supporting the roller beam and having their bottoms in contact with the main cross beam are symmetrically distributed on the short axis about the center, an arched opening groove (44) for accommodating the short axis is provided at the bottom of the roller beam fixing seat, hanging plates (45) are provided at both ends of the short axis, cylindrical contraction portions (46) are extended outwardly at both ends of the long axis, the top of the hanging plate is provided on the cylindrical contraction portion, the two ends of the cylindrical contraction portion are respectively placed on a sensor bearing seat (47), and a weighing sensor (5) in contact with the main cross beam is fixed at the bottom of the sensor bearing seat.

2. The barrier-free hidden weighing device for continuous casting steel billet as claimed in claim 1, Its characteristics are: The rollers are divided into a plurality of groups of rollers along the length direction of the roller beam, and each group of rollers is connected to a corresponding motor (8) located below the roller beam through a belt.

3. The barrier-free hidden weighing device for continuous casting steel billet as claimed in claim 1, Its characteristics are: Inwardly curved guide plates (6) are respectively provided on both side walls of the roller beam.

4. The barrier-free hidden weighing device for continuous casting steel billet as claimed in claim 1, Its characteristics are: A platform mesh plate (7) fixedly connected to the main crossbeam is provided between two adjacent roller beams.

5. The barrier-free hidden weighing device for continuous casting steel billet as claimed in claim 1, Its characteristics are: Cooling water is passed through the main cross beam.

6. A method for using the barrier-free hidden weighing device for continuous casting steel billets as claimed in any one of claims 1 to 5, Its characteristics are: It includes the following steps: After the billet is fed into the roller beam, the motor drives the roller to roll, driving the billet forward. The weight of the roller beam and the billet is transferred to the roller beam fixing seat. The roller beam fixing seat transfers gravity to the short shaft. The short shaft transfers gravity to the cylindrical contraction part through the hanging plate. The cylindrical contraction part transfers gravity to the sensor bearing seat. The top of the sensor bearing seat is provided with an arched opening groove for supporting the cylindrical contraction part. The sensor bearing seat finally transfers gravity to the weighing sensor for weighing.

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