Online steel billet weighing system

Abstract

The utility model discloses a steel billet on-line weighing system. The system at least comprises a weighing device. The weighing device comprises a frame and a plurality of weighing modules arranged below the frame. A plurality of roller ways are arranged on the frame at intervals; wherein the frame is composed of a first weighing frame and a second weighing frame which are the same in length; and the end parts of the first weighing frame and the second weighing frame are in clearance lap joint. The weighing frame is of a split structure and is connected in a lap joint mode, and equipment is convenient to machine, transport and install. A 10 mm gap is reserved between the two end faces of the first weighing frame and the second weighing frame, and the structural design enables the first weighing frame and the second weighing frame to have certain deformation in the direction of the center line M.

Description

Technical Field

[0001] The utility model relates to an online intelligent accurate weighing system for steel billets. Background Art

[0002] In the field of metallurgical equipment technology, billet weighing is one of the common equipment in front of the steel rolling heating furnace. It is mainly used to weigh and count the billets entering the furnace, so as to calculate the yield rate of the rolling line. Currently, the more commonly used weighing devices are the lifting frame type and the integral frame type. However, both have some shortcomings.

[0003] For example, patent 202123349984.9, whose application date is December 28, 2021, discloses a billet weighing device, including a roller, a hanging frame, a beam, a gantry, and a lifting mechanism. When the lifting mechanism is started, it drives the beam and the hanging frame to connect the billet to rise, and obtains the weight of the billet through the weighing sensor. However, its shortcomings are: 1) In order to weigh the billet, it is necessary to drive the power mechanism to lift the billet on the roller to a certain height for weighing. After weighing, it is necessary to drive the power mechanism to lower the billet to the roller surface. This process takes a certain amount of time, which affects the loading rhythm of the heating furnace; 2) The hydraulic cylinder and weighing sensor of the lifting mechanism are arranged directly above the hot billet, and the heat radiation is serious, which has a great impact on the service life of the equipment; 3) The overall structure is relatively cumbersome and the cost is high. The hydraulic cylinder and weighing sensor are arranged on the top, which makes daily inspection and maintenance troublesome; 4) The pulley and slide rail structure are arranged. Due to the frequent lifting and lowering movements and the serious heat radiation here, the daily lubrication and maintenance of the slide rail are large, which increases the labor intensity of the workers.

[0004] For example, patent 202220390916.2, with an application date of February 25, 2022, discloses an online weighing roller device, including a base, a support frame for support and a support platform installed on the upper end of the support frame, a front roller and a rear roller are provided on the support platform, the front roller is installed on the support platform through a stand, and a weighing sensor is provided at the bottom of the stand; the rear roller is installed on the support platform through a fixed seat, and a bottom weighing device is provided at the bottom of the support frame, and the steel billet is weighed by the set weighing sensor. However, it has the following shortcomings: 1) There is no mechanical limit device at the support frame and the seat, and the impact load of the billet during transportation will be transmitted to the weighing sensor, thereby affecting the service life and accuracy of the weighing sensor; 2) The seat of the front roller is a highly variable elastic seat. When the front roller is weighing, the seat needs to be lifted to separate the billet from the roller surface. After the weighing is completed, the seat is lowered again to place the billet on the roller surface. This process takes a certain amount of time, which affects the loading rhythm of the heating furnace; 3) Due to the setting of the front roller and the rear roller, in order to weigh larger workpieces, a weighing sensor is also set at the bottom of the support table, resulting in the need to set at least 8 sets of weighing sensors for the overall structure, which increases the cost and daily maintenance workload; 4) Due to the setting of the base, support frame, and support table structure, in order to ensure the strength and rigidity of the overall structure, the equipment is heavy, resulting in a high cost.

[0005] For example, patent 201520652785.0, filed on August 27, 2015, discloses an online weighing roller, including a conveying roller, on which one or more pairs of shear sensors are installed, and the multiple shear sensors form a measuring area, and the workpiece to be weighed passes through the measuring area under the rotation of the roller to achieve weighing measurement. However, the shortcomings are as follows: 1) The shear sensor is directly arranged on the roller frame. Since the roller is subjected to a large impact load during transportation, the impact load directly acts on the roller frame and then is transmitted to the shear sensor, which is easy to cause damage and failure of the shear sensor; 2) Due to the high temperature of the hot billet, the temperature of the roller frame under the action of thermal radiation is high, which is easy to cause damage and failure of the shear sensor; 3) Since the width of the measuring area needs to be greater than the length of the workpiece, the roller frame of the measuring area is an integral type. When the length of the workpiece is 16 meters or longer, the length of the roller frame must be greater than 16 meters or longer, which makes it difficult to process and transport the roller frame. Utility Model Content

[0006] In order to overcome the above-mentioned defects, the purpose of the utility model is to provide a novel on-line weighing system for steel billets.

[0007] To achieve the above-mentioned purpose, the utility model provides an online steel billet weighing system, wherein the system at least comprises a weighing device, wherein the weighing device comprises a frame and a plurality of weighing modules arranged below the frame; a plurality of rollers are arranged at intervals on the frame; wherein the frame comprises a first weighing frame and a second weighing frame of the same length; and the first weighing frame and the second weighing frame are overlapped at their ends.

[0008] Furthermore, a limiting device is arranged at the bottom of both ends of the frame; the limiting device comprises a second limiting bracket arranged below the frame and one or more first limiting brackets corresponding to the second limiting bracket on the foundation; the first limiting bracket and the second limiting bracket are arranged at intervals.

[0009] Furthermore, the second limiting bracket includes a second bracket seat arranged below the frame, and a limiting block is arranged below the bracket seat;

[0010] The first limiting bracket comprises a first bracket seat arranged on the foundation; a limiting nut is arranged on the first bracket seat; a limiting bolt is threaded in the limiting nut, and the limiting end of the bolt is spaced apart from the limiting block.

[0011] Furthermore, the spacing distance between the limiting end of the bolt and the limiting block is 0.5-2 mm.

[0012] Furthermore, the lower surfaces of the adjacent ends of the first limiting bracket and the second limiting bracket are both provided with supports; the two supports are connected by a connecting plate.

[0013] Furthermore, the rollers are symmetrically and cross-arranged on the first weighing frame and the second weighing frame.

[0014] Furthermore, an upper lap joint is provided on the end of the first limit bracket adjacent to the second limit bracket; a lower lap joint is provided on the end of the second limit bracket adjacent to the first limit bracket; an upper positioning plate is provided on the bottom surface of the upper lap joint; an inverted L-shaped lower positioning plate is provided on the top surface of the lower lap joint; the long side of the inverted L-shaped lower positioning plate abuts against the lower surface of the upper fixing plate; the inner side of the short side of the inverted L-shaped lower positioning plate is in positioning contact with the side edge of the upper fixing plate; the top end of the short side of the inverted L-shaped lower positioning plate is set at a distance of 2 mm from the top surface.

[0015] Furthermore, the system is sequentially provided with a weighing device, a metal detector and a transport roller.

[0016] In order to achieve the above-mentioned object, the utility model provides a method for weighing steel billets online, wherein the method is implemented by using the above-mentioned steel billet online weighing system, and the method comprises the following steps:

[0017] The transport roller conveyor transports the steel billet toward the weighing device;

[0018] When the metal detector detects the steel billet, the transport roller starts to slow down and measures the distance through coding;

[0019] After the transport roller continues to transport a distance of L=L1+L2, the movement stops;

[0020] The weighing module of the weighing device starts to read and at the same time transmits the collected weight data to the PLC system;

[0021] The transport rollers restart and transport the weighed billets to the heating furnace.

[0022] Compared with the prior art, the technical solution provided by the utility model has the following significant effects:

[0023] (1) The utility model is an online intelligent accurate weighing system for steel billets. The weighing frame is a split structure, consisting of a first weighing frame and a second weighing frame, which are connected by overlapping. The equipment is easy to process, transport and install. A 10mm gap is left between the two end surfaces of the first weighing frame and the second weighing frame. This structural design can make the first weighing frame and the second weighing frame have a certain deformation along the center line M direction.

[0024] (2) The utility model provides an online intelligent and precise weighing system for steel billets, which effectively limits the displacement of the first weighing frame and the second weighing frame caused by the impact load of the steel billets during transportation by setting a limit bracket (1) and a limit bracket (2), thereby improving the service life and weighing accuracy of the weighing module.

[0025] (3) The utility model provides an online intelligent precise weighing system for steel billets, wherein the first weighing frame and the second weighing frame are symmetrically structured along the center line M, and rollers are symmetrically cross-arranged between the first weighing frame and the second weighing frame, thereby effectively providing weighing accuracy.

[0026] (4) The utility model provides an online intelligent and precise weighing system for steel billets, which has a simple and compact structure, is easy to process, transport and install, and requires little daily maintenance.

[0027] (5) The utility model provides an online intelligent and precise weighing system for steel billets, which is equipped with a metal detector and an encoder at the tail of the motor of the transport roller. Through the intelligent control system of PLC, the entire weighing process is unmanned, which greatly improves the weighing efficiency, enhances the furnace loading rhythm and production efficiency, and reduces the labor intensity of personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic elevation diagram of the utility model steel billet online intelligent accurate weighing system;

[0029] Figure 2 It is a schematic elevation view of a weighing device of an online intelligent and precise weighing system for steel billets of the utility model;

[0030] Figure 3 yes Figure 2 Schematic diagram of L direction;

[0031] Figure 4 This is a schematic elevation diagram of a weighing module of an online intelligent and precise weighing system for steel billets of the utility model;

[0032] Figure 5 yes Figure 2 AA sectional view;

[0033] Figure 6 yes Figure 5 I is a partial enlarged schematic diagram;

[0034] Figure 7 yes Figure 2 K-direction schematic diagram;

[0035] Figure 8 for Figure 1 A partially enlarged schematic diagram of the middle part;

[0036] Fig. 9 It is a flow chart of the utility model on-line intelligent accurate weighing system for steel billets.

[0037] In the figure: 1, weighing device 2, metal detector 3, transport roller 101, first weighing frame 102, second weighing frame 103, weighing module 104, roller 105, limit bracket (I) 106, limit bracket (II) 107, support 108, upper positioning plate 109, lower positioning plate 110, connecting plate 111, pin 112, adjusting screw 113, nut (I) 114, nut (II) 115, pressure head DETAILED DESCRIPTION

[0038] The embodiments of the utility model are described in detail below with reference to the accompanying drawings.

[0039] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0040] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "plurality" means two or more.

[0041] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] Combination Figure 1 , Figure 2 , Figure 4 , Figure 8 The system of the utility model includes a weighing device, which includes a frame and a plurality of weighing modules arranged below the frame; a plurality of rollers are arranged at intervals on the frame; wherein the frame is composed of a first weighing frame and a second weighing frame of the same length; the first weighing frame and the second weighing frame are overlapped at their ends. Figure 8 As shown, a 10 mm gap H is left between the two end surfaces of the first weighing frame and the second weighing frame, so that the first weighing frame and the second weighing frame can have a certain deformation along the center line M direction.

[0043] Example 1

[0044] Combination Figure 1 , Figure 2 , Figure 4 , Figure 8 The steel billet online intelligent accurate weighing system of this embodiment comprises a weighing device 1, a metal detector 2, and a conveying roller 3. The conveying roller 3 is arranged at the entrance of the steel billet conveying direction, and the metal detector 2 is arranged between the conveying roller 3 and the weighing device 1.

[0045] The weighing device 1 includes a first weighing frame 101, a second weighing frame 102, a weighing module 103, a roller 104, a limit bracket (one) 105, a limit bracket (two) 106, and a support 107. The roller 104 and the support 107 are fixed to the bottom surface of the first weighing frame 101 and the second weighing frame 102 by bolts. The pressure head 115 of the weighing module 103 is installed in the pin hole on the bottom surface of the first weighing frame 101 and the second weighing frame 102. The limit bracket (one) 105 is fixed to the ground by anchor bolts, and the limit bracket (two) 106 is fixed to the bottom surface of the first weighing frame 101 and the second weighing frame 102 by welding.

[0046] Furthermore, a 10 mm gap H is left between the two end surfaces of the first weighing frame and the second weighing frame, so that the first weighing frame and the second weighing frame can be deformed to a certain extent along the center line M direction.

[0047] Example 2

[0048] Combination Figure 2 , Figure 3 The present embodiment is an online intelligent precise weighing system for steel billets, and its structure is basically the same as that of Embodiment 1, except that the first weighing frame 101 and the second weighing frame 102 are symmetrical structures along the center line M, and are connected by overlapping, with a 10 mm gap between the upper and lower end faces.

[0049] The rollers 104 are symmetrically arranged on the first weighing frame 101 and the second weighing frame 102. The weighing modules 103 are symmetrically arranged along the center line M, and at least 6 are arranged. The weighing modules 103 are symmetrically arranged along the center line N.

[0050] Example 3

[0051] Combination Figure 3 , Figure 5 , Figure 6 The structure of an online intelligent accurate weighing system for steel billets in this embodiment is basically the same as that in embodiment 1, except that an upper positioning plate 108 is welded to the bottom surface of the first weighing frame 101, and a lower positioning plate 109 is welded to the top surface of the second weighing frame 102. The upper positioning plate 108 and the lower positioning plate 109 are symmetrically arranged along the center line M. The inner top surface A of the upper positioning plate 108 and the lower positioning plate 109 plays a bearing role, the side surface B plays a positioning role along the axis direction of the roller table, and a 2mm gap is reserved on the outer top surface C. The first weighing frame 101 and the second weighing frame 102 are connected by bolts 109. Considering the deformation factor, the connection hole of the first weighing frame 101 is a waist-shaped hole.

[0052] A connecting plate 110 is arranged between the supports 107. Pin holes are arranged at both ends of the connecting plate 110. The pin holes are connected to the supports 107 through pin shafts 111. The supports 107 are symmetrically arranged along the center line M, and are arranged at 4 locations in total.

[0053] Example 4

[0054] Combination Figure 2 , Figure 7 The steel billet online intelligent precise weighing system of this embodiment has a structure basically the same as that of the embodiment 1, except that the position limiting bracket (II) 106 is symmetrically arranged along the center line N and is disposed at the center line M. The position limiting bracket (I) 105 is respectively arranged on the left side, the right side and the inner side of the position limiting bracket (II) 106.

[0055] The limit bracket (I) 105 is provided with an adjusting screw 112. Considering the deformation of the first weighing frame 101 and the second weighing frame 102, a gap of 1 mm is set between the adjusting screw 112 and the limit block on the limit bracket (II) 106.

[0056] The limiting bracket (1) 105 is provided with a nut (1) 113 and a nut (2) 114 . The nut (2) 114 is welded to the limiting bracket (1) 105 . The nut (1) 113 is movable and adjustable.

[0057] Example 5

[0058] Combination Figure 8 , an intelligent control system, the implementation steps are:

[0059] Step 1: The transport roller 3 transports the steel billet toward the weighing device 1. When the metal detector 2 detects the steel billet, the transport roller 3 starts to decelerate and measures the distance through the encoder.

[0060] Step 2: After the transport roller 3 continues to transport a distance of L=L1+L2, it stops moving;

[0061] Step 3: The weighing module 103 of the weighing device 1 starts to read, and at the same time, transmits the collected weight data to the PLC system, and completes the work of counting the number of steel billets and recording the weight;

[0062] Step 4: The transport roller 3 is restarted to transport the weighed billet to the heating furnace, thereby completing the number and weight record of a billet.

[0063] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0064] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A billet online weighing system, characterized in that: The system at least includes a weighing device, which includes a frame and a plurality of weighing modules arranged below the frame; a plurality of rollers are arranged at intervals on the frame; wherein the frame is composed of a first weighing frame and a second weighing frame of the same length; the first weighing frame and the second weighing frame are overlapped at their ends.

2. The steel billet online weighing system according to claim 1, characterized in that: A limiting device is arranged at the bottom of both ends of the frame; the limiting device comprises a second limiting bracket arranged below the frame and one or more first limiting brackets corresponding to the second limiting bracket on the foundation; the first limiting bracket and the second limiting bracket are arranged at intervals.

3. The steel billet online weighing system according to claim 2, characterized in that: The second limiting bracket includes a second bracket seat arranged below the frame, and a limiting block is arranged below the bracket seat; The first limiting bracket comprises a first bracket seat arranged on the foundation; a limiting nut is arranged on the first bracket seat; a limiting bolt is threaded in the limiting nut, and the limiting end of the bolt is spaced apart from the limiting block.

4. The steel billet online weighing system according to claim 3, characterized in that: The spacing distance between the limiting end of the bolt and the limiting block is 0.5-2 mm.

5. The steel billet online weighing system according to claim 2, characterized in that: The lower surfaces of the adjacent ends of the first limiting bracket and the second limiting bracket are both provided with supports; the two supports are connected by a connecting plate.

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