Billet on-line accurate weighing system and method

Abstract

The application discloses a billet online accurate weighing system and method. The system comprises a weighing device, the weighing device comprises a frame and a plurality of weighing modules arranged below the frame, a plurality of roller tables are arranged on the frame at intervals, the frame is composed of a first weighing frame and a second weighing frame with the same length, and the first weighing frame and the second weighing frame are overlapped at the end gaps. The weighing frame is of a split structure and is connected in an overlapping mode, so that the equipment is convenient to process, transport and install. A 10mm gap is left between the two end faces of the first weighing frame and the second weighing frame, and the structure design can make the first weighing frame and the second weighing frame have certain deformation along the center line M direction.

Description

TECHNICAL FIELD

[0001] The present application relates to an online intelligent precise weighing system and method for billets. BACKGROUND

[0002] In the field of metallurgical equipment technology, billet weighing is one of the common devices before the steel heating furnace, mainly used for weighing and counting the billets into the furnace, so as to count the yield of the rolling line. At present, the commonly used weighing devices are lifting frame type and integral frame type. However, there are some deficiencies.

[0003] Patent 202123349984.9 with the application date of December 28, 2021 discloses a billet weighing device, which comprises a roller, a hanging frame, a cross beam, a gantry, and a lifting mechanism. When the lifting mechanism is started, it drives the cross beam and the hanging frame to lift the billet, and the weight of the billet is obtained through the weighing sensor. However, it has the following deficiencies: 1) In order to realize the weighing of the billet, a driving power mechanism is needed to lift the billet on the roller to a certain height for weighing. After the weighing is completed, the driving power mechanism is needed to lower the billet to the roller surface. This process consumes a certain amount of time, affecting the furnace charging rhythm of the heating furnace; 2) The hydraulic cylinder of the lifting mechanism and the weighing sensor are arranged directly above the hot billet, and the heat radiation is serious, which greatly affects the service life of the equipment; 3) The overall structure is relatively complicated, and the cost is relatively high. The hydraulic cylinder and the weighing sensor are arranged above, and the daily maintenance and repair are troublesome; 4) The pulley and slide rail structure are arranged, and due to the frequent lifting movement and the serious heat radiation at this place, the lubrication of the slide rail needs to be maintained daily, which increases the labor intensity of the workers.

[0004] A patent with an application date of February 25, 2022, 202220390916.2 discloses an online weighing roller device, which comprises a base, a support frame provided on the base for support, and a support table mounted on the upper end of the support frame, a front roller and a rear roller are provided on the support table, the front roller is installed on the support table through a stand, and a weighing sensor is provided at the bottom of the stand; the rear roller is installed on the support table through a fixing seat, and a bottom weighing device is provided at the bottom of the support frame; the steel billet is weighed by the weighing sensor. However, it has the following disadvantages: 1) no mechanical limiting device is provided at the support frame and the stand, the impact load of the steel billet during transportation is transmitted to the weighing sensor, thereby affecting the service life and accuracy of the weighing sensor; 2) the stand of the front roller is a height-variable elastic seat, when the front roller is weighed, the stand needs to be lifted to separate the steel billet from the roller surface, after the weighing is completed, the stand is lowered to place the steel billet on the roller surface, which consumes a certain amount of time and affects the furnace charging rhythm of the heating furnace; 3) due to the provision of the front roller and the rear roller, in order to weigh the workpiece with large volume, the weighing sensor is provided at the bottom of the support table, which requires at least 8 sets of weighing sensors to be provided in the overall structure, thereby increasing the cost and daily maintenance workload; 4) due to the provision of the base, the support frame and the support table structure, in order to ensure the strength and rigidity of the overall structure, the equipment weight is heavy, thereby increasing the cost.

[0005] A patent with an application date of August 27, 2015, 201520652785.0 discloses an online weighing roller, which comprises a conveying roller, a pair or multiple pairs of shear force sensors are installed on the conveying roller, and multiple shear force sensors form a measurement zone, and the workpiece to be weighed is weighed by passing through the measurement zone under the action of the roller. However, it has the following disadvantages: 1) the shear force sensor is directly arranged on the roller frame, since the impact load is large during transportation of the roller, the impact load is directly transmitted to the shear force sensor after acting on the roller frame, which easily causes damage and failure of the shear force sensor; 2) due to high temperature of the hot billet, the temperature of the roller frame under the action of heat radiation is high, which easily causes damage and failure of the shear force sensor; 3) since the width of the measurement zone needs to be greater than the length of the workpiece, the roller frame of the measurement zone is integral type, when the length of the workpiece is 16 meters or more, the length of the roller frame must be greater than 16 meters or more, thereby causing difficulty in processing and transportation of the roller frame. SUMMARY

[0006] In order to overcome the above-mentioned defects, the purpose of the present application is to provide a novel online precise weighing system and method for steel billets.

[0007] In order to achieve the above purpose, the billet online accurate weighing system of the application, the system at least includes a weighing device, the weighing device includes a frame and a plurality of weighing modules arranged below the frame; A plurality of roller beds are arranged at intervals on the frame; wherein the frame is composed of a first weighing frame and a second weighing frame with the same length; The first weighing frame and the second weighing frame are overlapped at the end gap.

[0008] Further, a limiting device is arranged at the bottom of both ends of the frame; The limiting device is composed of a second limiting support arranged below the frame and one or more first limiting supports corresponding to the second limiting support on the foundation; The first limiting support and the second limiting support are arranged at intervals.

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

[0010] The first limiting support includes a first support seat arranged on the foundation; A limiting nut is arranged on the first support seat; A limiting bolt is screwed in the limiting nut, and the limiting end of the bolt is arranged at intervals with the limiting block.

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

[0012] Further, the lower surface of one end adjacent to the first limiting support and the second limiting support of the first limiting support and the second limiting support is provided with a support; The two supports are connected by a connecting plate.

[0013] Further, the roller bed is arranged symmetrically and crosswise on the first weighing frame and the second weighing frame.

[0014] Further, the first limiting support is provided with an upper lap joint at one end adjacent to the second limiting support; The second limiting support is provided with a lower lap joint at one end adjacent to the first limiting support; The bottom surface of the upper lap joint is provided with an upper positioning plate; The top surface of the lower lap joint is provided with an inverted L-shaped lower positioning plate; The long side of the inverted L-shaped lower positioning plate is in abutment with the lower surface of the upper positioning 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 positioning plate; The top end of the short side of the inverted L-shaped lower positioning plate is arranged at an interval of 2mm from the top surface.

[0015] Further, the system is sequentially arranged by the weighing device, the metal detector and the conveying roller bed.

[0016] In order to achieve the above purpose, the billet online weighing method of the application, the method is realized by using the above-mentioned billet online accurate weighing system, and the method comprises the following steps:

[0017] The conveying roller bed transports the billet to the weighing device;

[0018] When the metal detector detects the billet, the post-transport roller bed starts to decelerate and measures the distance through coding;

[0019] After the transport roller bed continues to transport a distance L=L1+L2, the movement is stopped;

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

[0021] The transport roller bed is restarted to transport the weighed billet into the heating furnace.

[0022] Compared with the prior art, the technical scheme provided by the present application has the following remarkable effects:

[0023] (1) The steel billet online intelligent precise weighing system has a split structure, is composed of a first weighing frame and a second weighing frame, is connected in a lap joint mode, and is convenient for equipment processing, transportation and installation. A 10mm gap is left between the two end faces of the first weighing frame and the second weighing frame, and this structure 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 steel billet online intelligent precise weighing system effectively limits the displacement of the first weighing frame and the second weighing frame caused by the impact load of the steel billet in the transportation process through the setting of the limiting support (one) and the limiting support (two), and improves the service life and the weighing precision of the weighing module.

[0025] (3) The steel billet online intelligent precise weighing system has a symmetrical structure type along the center line M direction of the first weighing frame and the second weighing frame, and the roller bed is arranged in a symmetrical cross mode between the first weighing frame and the second weighing frame, which effectively provides the weighing precision.

[0026] (4) The steel billet online intelligent precise weighing system has a simple, compact equipment structure, is convenient for processing, transportation and installation, and has a small amount of routine maintenance.

[0027] (5) The steel billet online intelligent precise weighing system sets the metal detector and the encoder at the tail of the motor of the transport roller bed, and through the intelligent control system of the PLC, the entire weighing process is unmanned, the weighing efficiency is greatly improved, the furnace loading rhythm and the production benefit are improved, and the labor intensity of personnel is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a front view of the steel billet online intelligent precise weighing system of the present application;

[0029] Figure 2is the vertical surface view of the weighing device of the steel billet online intelligent precise weighing system of the present application;

[0030] Figure 3 is Figure 2 the L direction view;

[0031] Figure 4 is the vertical surface view of the weighing module of the steel billet online intelligent precise weighing system of the present application;

[0032] Figure 5 is Figure 2 the A-A direction sectional view;

[0033] Figure 6 is Figure 5 the I direction partial enlarged view;

[0034] Figure 7 is Figure 2 the K direction view;

[0035] Figure 8 is Figure 1 the middle direction partial enlarged view;

[0036] Figure 9 is the flow chart of the steel billet online intelligent precise weighing system of the present application.

[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 support (one) 106, limit support (two) 107, support 108, upper positioning plate 109, lower positioning plate 110, connecting plate 111, pin shaft 112, adjusting screw 113, nut (one) 114, nut (two) 115, pressure head DETAILED DESCRIPTION

[0038] The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0039] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0040] The terms "first", "second", "third", etc. are used only for descriptive purposes and do not connote or imply relative importance or a number of the indicated technical features. Thus, features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified and limited.

[0041] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be directly connected, or indirectly connected through intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0042] In combination with Figure 1 , Figure 2 , Figure 4 , Figure 8 , the system of the present application comprises a weighing device, which comprises a frame and a plurality of weighing modules arranged below the frame; a plurality of roller beds are arranged on the frame at intervals; wherein the frame is composed of a first weighing frame and a second weighing frame with the same length; the first weighing frame and the second weighing frame are gap-lapped at the end portions. As shown in Figure 8 , a 10mm gap H is left between the two end faces of the first weighing frame and the second weighing frame, which can make the first weighing frame and the second weighing frame have certain deformation along the center line M direction.

[0043] Embodiment 1

[0044] In combination with Figure 1 , Figure 2 , Figure 4 , Figure 8 , the steel billet online intelligent precise weighing system of the present embodiment comprises a weighing device 1, a metal detector 2 and a conveying roller bed 3. The conveying roller bed 3 is arranged at the entrance of the steel billet conveying direction, and the metal detector 2 is arranged between the conveying roller bed 3 and the weighing device 1.

[0045] The weighing device 1 comprises a first weighing frame 101, a second weighing frame 102, a weighing module 103, a roller 104, a limiting support (one) 105, a limiting support (two) 106, and a support 107. The roller 104 and the support 107 are fixed on the bottom surfaces 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 of the bottom surface of the first weighing frame 101 and the second weighing frame 102. The limiting support (one) 105 is fixed to the ground by anchor bolts, and the limiting support (two) 106 is fixed to the bottom surface of the first weighing frame 101 and the second weighing frame 102 by welding.

[0046] Further, a 10mm gap H is left between the end faces of the first weighing frame and the second weighing frame, so that the first weighing frame and the second weighing frame can be deformed in the direction of the center line M.

[0047] Embodiment 2

[0048] In combination Figure 2 , Figure 3 , the steel billet online intelligent precise weighing system of the embodiment has the same structure as that of embodiment 1, and the difference and improvement are that the first weighing frame 101 and the second weighing frame 102 are symmetrically structured in the direction of the center line M and are connected by lapping, and 10mm gaps are left on the upper and lower end faces.

[0049] The roller 104 is symmetrically and crossly arranged on the first weighing frame 101 and the second weighing frame 102. The weighing module 103 is symmetrically arranged along the center line M and is provided at least at six positions. The weighing module 103 is symmetrically arranged along the center line N.

[0050] Embodiment 3

[0051] In combination Figure 3 , Figure 5 , Figure 6 , the steel billet online intelligent precise weighing system of the embodiment has the same structure as that of embodiment 1, and the difference and improvement are that the first weighing frame 101 is welded with an upper positioning plate 108 on the bottom surface, the second weighing frame 102 is welded with a lower positioning plate 109 on the top surface, and 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 in the direction of the roller axis, and the outer top surface C is provided with a 2mm gap. The first weighing frame 101 and the second weighing frame 102 are connected by bolts 109, and the connecting hole of the first weighing frame 101 is a waist-shaped hole considering the deformation factor.

[0052] A connecting plate 110 is provided between the supports 107. The connecting plate 110 has pin holes at both ends. The diameter of the pin holes is connected to the supports 107 through pins 111. The supports 107 are arranged symmetrically along the center line M, with a total of 4 supports.

[0053] Example 4

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

[0055] An adjusting screw 112 is installed on the limiting bracket (a) 105. Considering the deformation of the first weighing frame 101 and the second weighing frame 102, a 1mm gap is provided between the adjusting screw 112 and the limiting block on the limiting bracket (b) 106.

[0056] Nut (I) 113 and nut (II) 114 are provided on the limiting bracket (I) 105. Nut (II) 114 is welded to the limiting bracket (I) 105, and nut (I) 113 is adjustable.

[0057] Example 5

[0058] Combination Figure 8 An intelligent control system is implemented through the following steps:

[0059] Step 1: The conveyor roller 3 transports the steel billet towards the weighing device 1. When the metal detector 2 detects the steel billet, the conveyor roller 3 begins to decelerate and measures distance using an encoder.

[0060] Step 2: After the transport roller 3 has continued to transport a distance L = L1 + L2, stop moving;

[0061] Step 3: The weighing module 103 of the weighing device 1 starts reading, 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 conveyor 3 restarts, transporting the weighed steel billets into the heating furnace. This completes the counting and weight recording of each steel billet.

[0063] The application has been described in detail with reference to the drawings, but the application is not limited to the above-described embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit and scope of the application. Many other changes and modifications can be made to the application without departing from the concept and scope of the application, and should be considered as falling within the scope of the application.

[0064] In the description of the present specification, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0065] The above description is merely specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A billet on-line accurate weighing system, characterized by, The system comprises a weighing device, the weighing device comprises a frame and a plurality of weighing modules arranged below the frame; a plurality of roller tables are arranged on the frame; wherein the frame is composed of a first weighing frame and a second weighing frame with the same length; the first weighing frame and the second weighing frame are overlapped at the end gaps; a limiting device is arranged at the bottom of the frame at both ends; The limiting device comprises a second limiting support arranged below the frame and one or more first limiting supports arranged on the foundation corresponding to the second limiting support; the first limiting support and the second limiting support are arranged at intervals; the second limiting support comprises a second support seat arranged below the frame, and a limiting block is arranged below the support seat; The first limiting support comprises a first support seat arranged on the foundation; a limiting nut is arranged on the first support seat; a limiting bolt is screwed into the limiting nut, and the limiting end of the bolt is arranged at an interval from the limiting block; The lower surface of one end of the first limiting support adjacent to the second limiting support is provided with a support; the two supports are connected by a connecting plate; The roller tables are arranged symmetrically and cross each other on the first weighing frame and the second weighing frame; The first limiting support is provided with an upper lap joint at one end adjacent to the second limiting support; the second limiting support is provided with a lower lap joint at one end adjacent to the first limiting support; the upper lap joint is provided with an upper positioning plate on the bottom surface; the lower lap joint is provided with an inverted L-shaped lower positioning plate on the top surface; the long side of the inverted L-shaped lower positioning plate is in abutment with the lower surface of the upper positioning 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 positioning plate; the top end of the short side of the inverted L-shaped lower positioning plate is arranged at an interval of 2 mm from the top surface.

2. The billet on-line precision weighing system as claimed in claim 1, wherein, The interval distance between the limiting end of the bolt and the limiting block is 0.5-2 mm.

3. The billet on-line precision weighing system as claimed in claim 1, wherein, The system is sequentially arranged by the weighing device, the metal detector and the conveying roller table.

4. A method for on-line weighing of billets, said method being realized by means of the on-line precise weighing system of billets according to claim 1, characterized in that, The method comprises the following steps: The conveying roller table transports the billet to the weighing device; When the metal detector detects the billet, the conveying roller table starts to slow down and measures the distance by coding; After the conveying roller table continues to transport a distance L=L1+L2, it stops moving; The weighing module of the weighing device starts reading, and at the same time, the collected weight data is transmitted to the PLC system; The conveying roller table is restarted to transport the weighed billet into the heating furnace.

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