Automatic scale calibration system

Abstract

The invention belongs to the technical field of scale calibration equipment and systems of concrete mixing plants, and particularly relates to an automatic scale calibration system which comprises a hopper scale, a support, loading platforms, lifting hook pieces, a first driving mechanism and a control module, the support is arranged at the upper end of the hopper scale and extends outwards towards the two sides, the loading platforms are arranged below the two sides of the hopper scale, and the lifting hook pieces are arranged on the loading platforms. The lifting hook piece comprises a ladder frame, weight frames and weights, the weight frames are placed on all steps of the ladder frame respectively, the lifting hook piece can be vertically and movably arranged between the support and the loading platform, and the first driving mechanism is arranged on the support and connected with the lifting hook piece. The weight frames are distributed on the stepped frame in a stepped mode, the first driving mechanism is controlled to drive the lifting hook piece to move from bottom to top during scale calibration, the automatic scale calibration function that a plurality of calibration weights are added to the two sides of the hopper scale at the same time can be achieved, and the scale calibration efficiency and accuracy can be improved; after the scale is calibrated, the lifting hook piece is quickly recovered to be in a suspended state, normal use of the hopper scale is not affected, and the function of temporary scale calibration in the production process is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of calibration equipment and systems for concrete mixing stations, and in particular relates to an automatic calibration system. Background Art

[0002] When producing concrete, various materials and additives need to be weighed separately and added to the mixer in turn for mixing. Inaccurate weighing will affect the mix ratio of concrete, thereby affecting the quality of concrete processing, and excessive material consumption will lead to increased production costs.

[0003] Each mixing station usually has weekly, monthly and quarterly calibrations to calibrate the weighing system regularly or irregularly. The higher the calibration frequency, the higher the concrete production quality and the lower the production cost.

[0004] Traditional weighing calibration operations rely purely on manual transport of weights to the hopper of the weighing system. The largest single weight weighs 25 kilograms, but the maximum calibration value of the weighing system is 3 tons. It is usually necessary to set multiple calibration weights for multiple calibrations, resulting in a huge workload for manual calibration. A complete calibration takes half a day, seriously affecting production efficiency. In addition, when manually transporting weights to the hopper of the weighing system, there are great safety hazards due to the narrow operating space and unsafe standing position.

[0005] The patent document with publication number CN218646439U discloses an automatic weighing device for the metering module of an asphalt mixing station, including a weighing scale, an automatic lifting component and weights. The weighing scale is installed on the frame platform of the asphalt mixing station. The two symmetrical sides of the weighing scale are respectively installed with support beams cantilevered outwards. The weights are evenly distributed on two weight boxes. A weight box is correspondingly provided above the support beam on each side, and the automatic lifting component is provided below the weight box. During weighing, the automatic lifting component acts downward to drive the weight box to move downward and place it on the support beam; after the weighing is completed, the automatic lifting component acts upward to lift the weight box away from the support beam. The automatic weighing device of the present invention uses an automatic lifting component to replace the manual handling of weights for weighing, which greatly improves the weighing efficiency, eliminates the need for manual work, and eliminates safety hazards.

[0006] However, different materials have different calibration weight requirements for the weighing system. The above-mentioned device needs to increase or decrease the number of weights when performing multiple calibrations. Since the weight box is set above the support beam and the automatic lifting component, its position is relatively high, which brings many inconveniences to the manual increase or decrease of weights. In addition, accidental falling of weights can easily cause serious damage to the human body or objects. Summary of the invention

[0007] In view of the shortcomings of the prior art, the purpose of the present invention is to provide an automatic weighing system with an automatic weighing function for multiple calibration weights, which can improve the weighing efficiency and accuracy.

[0008] In order to solve the above technical problems, the present invention provides an automatic weighing system, including a hopper scale; A bracket, which is arranged at the upper end of the hopper scale and extends outwardly to both sides; A loading platform is arranged below both sides of the hopper scale, and includes a ladder rack, a weight rack and weights. The weight racks are respectively placed on each level of the ladder rack, and the weights are evenly placed on the weight racks. A hook member, which is vertically movably disposed between the bracket and the loading platform; A first driving mechanism, which is arranged on the bracket and connected to the hook member, and is used to drive the hook member to move vertically. When the hook member moves from bottom to top, the weight racks on each level of the ladder are sequentially hung on the hook member. When the hook member moves from top to bottom, the weight racks fall back onto each level of the ladder in sequence. A control module is electrically connected to the hopper scale and the first driving mechanism respectively.

[0009] Preferably, in the above scheme, the steps are arranged outside the two ends of the weight rack, each step is provided with a first groove opening upward, and the two ends of the weight rack are provided with hanging ears, which are adapted to and slidably connected with the first groove.

[0010] Preferably, in the above scheme, the hook member includes a vertical rod, a longitudinal rod and a second groove, the vertical rod and the second groove are arranged on the longitudinal rod in an alternating manner, the upper end of the vertical rod is connected to the first driving mechanism, and the second groove is arranged directly below the hanging ear.

[0011] Preferably, in the above scheme, the first driving mechanism includes a servo electric cylinder, the servo electric cylinder is mounted on the bracket, and the lead screw of the servo electric cylinder extends downward and is connected to the upper end of the hook member.

[0012] Preferably, the above solution further comprises a first distance measuring module, which is electrically connected to the control module and is used to collect the distance between the hook and the bracket.

[0013] Preferably, in the above scheme, the loading platform also includes a transverse movement mechanism and a lifting mechanism, the ladder frame and the lifting mechanism are arranged on the transverse movement mechanism, the transverse movement mechanism and the lifting mechanism are electrically connected to the control module respectively, the bracket is horizontally placed on the hopper scale, and the lifting mechanism is used to raise the height of the bracket.

[0014] Preferably, in the above scheme, the transverse movement mechanism includes a base, a slide and a second driving mechanism, the ladder frame and the lifting mechanism are fixed on the slide, and the second driving mechanism is used to drive the slide to move laterally on the base.

[0015] Preferably, in the above scheme, the lifting mechanism includes a cylinder body, a piston rod and a third driving mechanism, the cylinder body is installed on the slide, the piston rod is vertically movably arranged on the cylinder body, and the third driving mechanism is used to drive the piston rod to lift the height of the bracket.

[0016] Preferably, in the above solution, the lifting mechanism further includes a second distance measuring module for collecting the vertical movement distance of the piston rod.

[0017] Preferably, the above scheme further includes a detection module, which is electrically connected to the control module and is used to detect whether the bracket has moved horizontally to a preset position of the hopper scale.

[0018] Compared with the existing technology, the present invention has the following beneficial effects:

[0019] 1. The present invention discloses an automatic calibration system. A ladder frame is provided so that the weight frame is distributed in a ladder-like manner. During the calibration process, the first driving mechanism is controlled to drive the hook member to move from bottom to top, so that the automatic calibration function of adding multiple calibration weights on both sides of the hopper scale can be realized, which can improve the calibration efficiency and accuracy. After the calibration is completed, the first driving mechanism is controlled to drive the hook member to move from top to bottom, so that the hook member can be quickly restored to a suspended state, thereby not affecting the normal use of the hopper scale, and having the function of temporary calibration during the production process.

[0020] 2. The step frame in the present invention is arranged on the outer sides of both ends of the weight rack, and each level of the step is respectively provided with a first groove with an upward opening, and both ends of the weight rack are provided with hanging ears, which are adapted to the first grooves and slidably connected, so as to avoid position deviation when the weight rack is placed back and forth on the step frame.

[0021] 3. The first distance measuring module in the present invention can collect the distance between the hook and the bracket in real time, so as to accurately control the upward movement height of the hook, thereby controlling the maximum number of weight racks hung on the hook, which can better meet the weighing range calibration requirements of different materials.

[0022] 4. The present invention can translate the bracket from one hopper scale to another hopper scale by cooperating with the transverse movement mechanism and the lifting mechanism, so that one calibration system can meet the automatic calibration requirements of multiple hopper scales.

[0023] 5. The second distance measuring module in the present invention is used to collect the distance of the vertical movement of the piston rod, and can accurately control the lifting height of the piston rod, ensure that the bracket is lifted steadily by the piston rod, and keep the hanging member in a suspended state.

[0024] 6. The present invention provides a detection module, so that when the lateral movement mechanism translates the bracket from one hopper scale to another hopper scale, it can ensure that the bracket is moved to a preset position of the hopper scale. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The figure is a schematic diagram of the overall structure of an automatic calibration system of the present invention.

[0026] Figure 2 For the present invention Figure 1 A partial enlarged view of .

[0027] Figure 3 It is a structural schematic diagram of the loading platform of the present invention.

[0028] Figure 4 It is a schematic diagram of the installation structure of the ladder rack and the weight rack of the present invention.

[0029] Figure 5 It is a schematic diagram of the installation structure of the servo electric cylinder and the hook member of the present invention.

[0030] Figure 6 It is a structural schematic diagram of the hook member of the present invention.

[0031] Figure 7 The present invention is a circuit connection diagram of an automatic calibration system.

[0032] Among them, 1- hopper scale, 2- bracket, 21- bayonet, 3- loading platform, 31- step frame, 311- first groove, 32- weight frame, 321- ear, 33- weight, 34- transverse mechanism, 341- base, 342- slide, 343- second drive mechanism, 35- lifting mechanism, 351- cylinder body, 352- piston rod, 353- third drive mechanism, 354- second distance measuring module, 4- hook, 41- vertical rod, 42- longitudinal rod, 43- second groove, 44- baffle, 5- first drive mechanism, 51- servo electric cylinder, 6- control module, 7- first distance measuring module, 8- detection module, 9- fixed frame. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations 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 orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0035] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If the terms "first", "second", "third" are described, they are only used for the purpose of description and distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" 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 mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection 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. The following is an explanation of the embodiments of the present invention based on its overall structure.

[0037] like Figure 1-7As shown, the present invention discloses an automatic calibration system, including a hopper scale 1, a bracket 2, a loading platform 3, a hook member 4, a first driving mechanism 5 and a control module 6. The bracket 2 is arranged at the upper end of the hopper scale 1 and extends outward on both sides. The loading platform 3 is arranged below both sides of the hopper scale 1, and includes a ladder frame 31, a weight frame 32 and weights 33. The weight frames 32 are respectively placed on each level of the ladder frame 31, and the weights 33 are evenly placed on the weight frames 32. The hook member 4 is vertically movably arranged between the bracket 2 and the loading platform 3. The first driving mechanism 5 is arranged on the bracket 2 and connected to the hook member 4, and is used to drive the hook member 4 to move vertically. When the hook member 4 moves from bottom to top, the weight frames 32 on each level of the ladder are sequentially hung on the hook member 4. When the hook member 4 moves from top to bottom, the weight frames 32 fall back on each level of the ladder in sequence. The control module 6 is electrically connected to the hopper scale 1 and the first driving mechanism 5 respectively. In this embodiment, a ladder frame 31 is arranged to make the weight frame 32 present a stepped distribution. When calibrating, the first driving mechanism 5 is controlled to drive the hook member 4 to move from bottom to top. When the weight frame 32 on each step is hung on the hook member 4, the hopper scale 1 will record the calibration data once, and can realize the automatic calibration function of adding multiple calibration weights on both sides of the hopper scale 1 at the same time, which can improve the calibration efficiency and accuracy; controlling the first driving mechanism 5 to drive the hook member 4 to move from top to bottom can quickly restore the hook member 4 to a suspended state, thereby not affecting the normal use of the hopper scale 1, and having the function of temporary calibration during the production process.

[0038] Continue to refer Figure 1-4 , the ladder rack 31 in this embodiment is arranged outside the two ends of the weight rack 32, and each level of the ladder is respectively provided with a first groove 311 with an opening facing upward, and the two ends of the weight rack 32 are provided with a hanging ear 321, and the hanging ear 321 is adapted to the first groove 311 and is slidably connected. Specifically, the ladder rack 31 can be set as an equal-height ladder structure, and the first groove 311 can be set at equal intervals to ensure that there is a certain distance between the weight racks 32. The first groove 311 is set as a semi-circular arc groove, and the hanging ear 321 is set as a cylindrical structure adapted to the semi-circular arc groove, which can avoid position deviation when the weight rack 32 is placed back and forth on the ladder rack 31. In addition, the number of ladders of the ladder rack 31 and the number of weights 33 on the weight rack 32 can be set according to the calibration range of the hopper scale 1. The weight rack 32 is set at the bottom of both sides of the hopper scale 1, and the manual sub-packaging of the weights 33 is convenient. Even if the weights 33 fall accidentally, it is not easy to cause significant damage to the human body or objects.

[0039] Continue to refer Figure 6The hook member 4 in this embodiment includes a vertical rod 41, a longitudinal rod 42 and a second groove 43. The vertical rod 41 and the second groove 43 are arranged on the longitudinal rod 42 in an interlaced manner. The upper end of the vertical rod 41 is connected to the first driving mechanism 5, and the second groove 43 is arranged directly below the hanging ear 321. Specifically, the hook member 4 is arranged between the ladder frame 31 and the weight frame 32, and a spacing is left between the two. The second groove 43 is arranged horizontally on the vertical rod 41 at intervals. The second groove 43 and the first groove 311 are arranged as semicircular grooves of the same structure. A baffle 44 is arranged on the side of the vertical rod 41 close to the weight frame 32 to prevent the weight frame 32 from swinging greatly when being lifted. In the initial state, the hook member 4 is suspended, and only the upper end of the vertical rod 41 is connected to the first driving mechanism 5.

[0040] Continue to refer Figure 5 In this embodiment, the first driving mechanism 5 includes a servo electric cylinder 51, which is mounted on the bracket 2. The lead screw of the servo electric cylinder 51 extends downward and is connected to the upper end of the hook member 4. Specifically, a servo electric cylinder 51 is respectively mounted on the bracket 2 above both ends of the weight rack 32, which can lift the weight rack 32 more stably and provide sufficient traction power.

[0041] Furthermore, it also includes a first distance measuring module 7, which is electrically connected to the control module 6 and is used to collect the distance between the hook 4 and the bracket 2. Specifically, the first distance measuring module 7 can use an infrared distance measuring sensor, and the infrared distance measuring sensor is respectively set at the bottom of the bracket 2 just above each hook 4, so that the distance from the upper end of the hook 4 to the bottom of the bracket 2 can be collected in real time, and the minimum distance is set according to the height of each layer of weight rack 32, so that the upward height of the hook 4 can be accurately controlled, thereby controlling the maximum number of weight racks 32 hung on the hook 4, and better meeting the weighing range calibration requirements of different materials. In addition, the control system 6 can also set multiple balance distances according to the height of each layer of weight rack 32. When the distance between any hook 4 and the bracket 2 reaches a balance distance, the servo electric cylinder 51 connected to the hook 4 is controlled to stop working. When the distance between each hook 4 and the bracket 2 reaches the same balance distance, each servo electric cylinder 51 is controlled to continue working, which can ensure that each layer of weight rack 32 is stably lifted by the hook 4, which helps to improve the system balance of the calibration process.

[0042] The loading platform 3 in this embodiment also includes a transverse mechanism 34 and a lifting mechanism 35. The step frame 31 and the lifting mechanism 35 are arranged on the transverse mechanism 34. The transverse mechanism 34 and the lifting mechanism 35 are electrically connected to the control module 6 respectively. The bracket 2 is horizontally placed on the hopper scale 1, and the lifting mechanism 35 is used to raise the height of the bracket 2. Specifically, in order to meet the needs of weighing multiple materials at the same time, the concrete mixing station usually arranges multiple hopper scales 1 horizontally side by side on the fixed frame 9. The lifting mechanism 35 of this embodiment can lift the bracket 2 from the upper end of the hopper scale 1 to a suspended state. Through the cooperation of the transverse mechanism 34 and the lifting mechanism 35, the bracket 2 can be translated from one hopper scale 1 to another hopper scale 1, so that one calibration system can meet the automatic calibration needs of multiple hopper scales 1.

[0043] Continue to refer Figure 3 The transverse movement mechanism 34 in this embodiment includes a base 341, a slide 342 and a second driving mechanism 343. The step frame 31 and the lifting mechanism 35 are fixed on the slide 342. The second driving mechanism 343 is used to drive the slide 342 to move horizontally on the base 341. Specifically, the upper end of the base 341 is provided with a slide groove that matches the shape of the bottom of the slide 342. The second driving mechanism 343 includes a motor and a screw. The screw is horizontally arranged on the slide groove and its two ends are rotatably connected to the base 341. The slide 342 is threadedly connected to the screw. The output end of the motor is connected to one end of the screw to drive the screw to rotate and drive the slide 342 to move horizontally on the slide groove.

[0044] Continue to refer Figure 4 The lifting mechanism 35 in this embodiment includes a cylinder body 351, a piston rod 352 and a third driving mechanism 353. The cylinder body 351 is mounted on the slide 342, and the piston rod 352 is vertically movable on the cylinder body 351. The third driving mechanism 353 is used to drive the piston rod 352 to lift the height of the bracket 2. Specifically, a bayonet 21 adapted to the top of the piston rod 352 is provided at the bottom of the bracket 2. The top of the piston rod 352 is slidably connected with the bayonet 21. After the bracket 2 is lifted to a suspended state by the piston rod 352, the bayonet 21 can ensure that the bracket 2 remains stable during the process of being translated by the transverse mechanism 34, so as to avoid the position of the bracket 2 from being offset, which affects the accuracy of the calibration system. The power source of the third driving mechanism 353 can be a motor or a hydraulic system.

[0045] Furthermore, the lifting mechanism 35 in this embodiment also includes a second distance measuring module 354 for collecting the vertical distance of the piston rod 352. It can be understood that the preparation distance and the target distance are set by the control module 6. When any piston rod 352 moves vertically to a position close to the bayonet 21 and reaches the preparation distance, the piston rod 352 is controlled to stop lifting. When the vertical distance of each piston rod 352 reaches the preparation distance, each piston rod 352 is controlled to continue to lift to the target distance, so as to ensure that the bracket 2 is lifted steadily by the piston rod 352. It is worth noting that when the bracket 2 is lifted to the target distance, the hook member 4 remains in a suspended state and does not contact the weight rack 32. When the hopper scale 1 is used in normal production, the bracket 2 can also be kept in a state of being lifted to the target distance.

[0046] Furthermore, the present embodiment further includes a detection module 8, which is electrically connected to the control module 6 and is used to detect whether the bracket 2 has moved horizontally to the preset position of the hopper scale 1. Preferably, the detection module 8 can use an infrared sensor, and the infrared sensors are respectively arranged on the fixing frames 9 near the two ends of the hopper scale 1. When the infrared sensors at both ends detect that the bracket 2 has moved horizontally to the preset position above the hopper scale 1, the piston rod 352 is controlled to drop to the initial position, and the bracket 2 is horizontally placed on the hopper scale 1 and does not contact the piston rod 352.

[0047] The foregoing description of specific exemplary embodiments of the present invention is for the purpose of illustration and demonstration. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the present invention and various different selections and changes. The scope of the present invention is intended to be limited by the claims and their equivalents.

Claims

1. An automatic calibration system, characterized in that: include: Hopper scale; A bracket, which is arranged at the upper end of the hopper scale and extends outwardly to both sides; A loading platform is arranged below both sides of the hopper scale, and includes a ladder rack, a weight rack and weights. The weight racks are respectively placed on each level of the ladder rack, and the weights are evenly placed on the weight racks. A hook member, which is vertically movably disposed between the bracket and the loading platform; A first driving mechanism, which is arranged on the bracket and connected to the hook member, and is used to drive the hook member to move vertically. When the hook member moves from bottom to top, the weight racks on each level of the ladder are sequentially hung on the hook member. When the hook member moves from top to bottom, the weight racks fall back onto each level of the ladder in sequence. A control module is electrically connected to the hopper scale and the first driving mechanism respectively.

2. The automatic calibration system according to claim 1, characterized in that: The steps are arranged outside the two ends of the weight rack, and each step is provided with a first groove with an upward opening. Both ends of the weight rack are provided with hanging ears, and the hanging ears are adapted to and slidably connected with the first groove.

3. The automatic calibration system according to claim 2, characterized in that: The hook member includes a vertical rod, a longitudinal rod and a second groove. The vertical rod and the second groove are arranged on the longitudinal rod in an alternating manner. The upper end of the vertical rod is connected to the first driving mechanism, and the second groove is arranged directly below the hanging ear.

4. The automatic calibration system according to claim 1, characterized in that: The first driving mechanism comprises a servo electric cylinder, which is mounted on the bracket. The lead screw of the servo electric cylinder extends downward and is connected to the upper end of the hook member.

5. The automatic calibration system according to claim 1, characterized in that: It also includes a first distance measuring module, which is electrically connected to the control module and is used to collect the distance between the hook and the bracket.

6. The automatic calibration system according to claim 1, characterized in that: The loading platform also includes a transverse movement mechanism and a lifting mechanism. The ladder frame and the lifting mechanism are arranged on the transverse movement mechanism. The transverse movement mechanism and the lifting mechanism are electrically connected to the control module respectively. The bracket is horizontally placed on the hopper scale, and the lifting mechanism is used to raise the height of the bracket.

7. An automatic calibration system according to claim 6, characterized in that: The transverse movement mechanism includes a base, a slide and a second driving mechanism. The ladder frame and the lifting mechanism are fixed on the slide. The second driving mechanism is used to drive the slide to move transversely on the base.

8. The automatic calibration system according to claim 7, characterized in that: The lifting mechanism includes a cylinder body, a piston rod and a third driving mechanism. The cylinder body is installed on the slide. The piston rod is vertically movably arranged on the cylinder body. The third driving mechanism is used to drive the piston rod to lift the height of the bracket.

9. The automatic calibration system according to claim 8, characterized in that: The lifting mechanism also includes a second distance measuring module, which is used to collect the vertical movement distance of the piston rod.

10. The automatic calibration system according to claim 6, characterized in that: It also includes a detection module, which is electrically connected to the control module and is used to detect whether the bracket has moved horizontally to a preset position of the hopper scale.

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