CN218066732U - Scale calibration structure - Google Patents

Abstract

The utility model relates to a material weighing-appliance technical field especially relates to a school balance structure, including setting up at the fixed pulley group one of scale bucket support, setting up at scale frame or ground and be located fixed pulley group two below the fixed pulley group one and the flexible cable, school balance structure still includes weighing sensor, weighing sensor with the scale bucket support is connected, and the setting of fixed pulley group one and each pulley of fixed pulley group two satisfies when the flexible cable in proper order respectively around the orientation of each section of flexible cable and each pulley non-contact behind each pulley of fixed pulley group one and fixed pulley group two be vertical direction, and the first end of flexible cable is fixed on scale bucket support or scale frame, and the second end of flexible cable is used for hanging the heavy object so that the flexible cable atress. The scale calibration structure solves the problem that the total weight of the heavy objects needs to meet the condition that the total weight of the heavy objects is close to the range of the batching scale in the process of scale calibration, so that the heavy objects are used too much in the process of scale calibration, and simultaneously, the labor intensity of scale calibration workers is reduced. In addition, the structure of the school scale only needs to be modified on the basis of the original scale body, and the school scale is simple in structure and high in practicability.

Description

A scale structure

technical field

The utility model relates to the technical field of material weighing equipment, in particular to a calibration scale structure.

Background technique

In some industrial production processes, it is necessary to batch different raw materials according to a certain ratio. This batching process can be continuous or divided into different batches, but batching scales are required in the batch batching process. Measure raw materials. As a weighing instrument, the batching scale needs to be checked regularly to ensure that the accuracy of the batching scale is within the allowable error range.

At present, there are two ways to calibrate the batching scale. One is to directly place the required weight on the weight rack or tray of the batching scale to check the scale body, and the other is to configure the required weight on the scale body. Weights or weight substitutes, these two methods are to use standard weights or weight substitutes with constant weight to calibrate the scale, and the general batching scale will set a weight rack on the scale body for swinging when the scale is calibrated. Put the weights, and some batching scales also set the hooks in advance, hang the special tray on the hooks and put the special weights on the trays to calibrate the scales. In this case, the calibration of the scales The weight of the weight cannot be less than 75% of the range of the batching scale. It is best to use a weight with the same weight as the range of the batching scale for checking, so that the entire range of the batching scale can be checked.

The weights or their substitutes that need to be used in the calibration process of the existing calibration method are usually held up by the platform or placed directly on the ground. When the calibration is required, the air cylinder or hydraulic cylinder on the batching scale is activated to change The position of the weight enables the weight of the weight to be transferred to the scale body. This calibration method is an automatic calibration method; while the calibration method of directly placing weights is a one-time calibration method for large-scale batching scales. Several tons of weights need to be placed, which is very labor-intensive and time-consuming. In addition, the calibration of the batching scale may not be completed at one time. After calibration with standard weight weights, a re-check is required. If the re-check data is not up to standard , you need to check the scale again, and the workload is even greater. Whether it is the automatic calibration method or the method of directly placing weights to calibrate the scale, both calibration methods have the following disadvantages, that is, the scale body needs to occupy weights or their substitutes for a long time, and these weights or other weights used in the calibration process The substitutes are generally heavy. If the scale body is placed in a building and is located on a higher floor, the weight is transmitted on the floor, which means that the floor bears a heavy load for a long time, causing damage to the civil engineering design. The requirements have been increased accordingly. In addition, the automatic calibration method requires lifting equipment such as cylinders or hydraulic cylinders, resulting in large investment and high construction costs.

Based on this, how to provide a low-cost calibrating device that does not take up many weights or their substitutes to reduce weight is an urgent problem to be solved by those skilled in the art.

Utility model content

In order to solve the above technical problems, the utility model provides a scale calibration structure.

In order to achieve the above object, the utility model provides the following technical solutions:

A scale calibration structure, comprising a fixed pulley set 1 arranged on the scale bucket support, a fixed pulley set 2 arranged on the scale frame or the ground and located below the fixed pulley set 1, and flexible cables, the scale calibration structure also includes a load cell, The load cell is connected to the weighing bucket support, and the pulleys of the fixed pulley block 1 and the fixed pulley block 2 are set to meet the requirement that when the flexible cables respectively wind around the fixed pulley block 1 and the fixed pulley block 2 After each pulley of each pulley, the direction of each segment of the flexible cable that is not in contact with each pulley is the vertical direction, and the first end of the flexible cable is fixed on the weighing bucket support or the scale frame, and the flexible cable The second end is used for hanging heavy objects so that the flexible cable is stressed.

The beneficial effect is: when the scale is in the original state, the weighing frame of the batching scale is fixed on the ground, the weighing bucket support for supporting the weighing bucket is placed on the weighing frame, and the contact position between the weighing bucket support and the weighing frame is set. There are load cells. When setting up the school scale structure, it is necessary to set the fixed pulley group 1 and the fixed pulley group 2 on the scale bucket support and the scale frame respectively, and then use the flexible cable to wind the pulleys of the fixed pulley group 1 and the fixed pulley group The first end of the cable is fixed on the scale bucket support or the scale frame, and the second end of the cable is used to hang heavy objects. When calibrating the scale, the second end of the flexible cable is in a state of stress and straightening due to the load-bearing. Since the tangent line between the flexible cable and each pulley in the vertical direction coincides, the sections of the flexible cable that are not in contact with each pulley They are all in the vertical direction. When a heavy object is hung on the second end of the flexible cable so that the second end of the flexible cable is stressed, according to the principle of the fixed pulley, it is only necessary to calculate the number of fixed pulleys arranged on the support of the scale bucket. count, or calculate the number of sections in the vertical direction that are not in contact with each pulley after the flexible cable winds around the pulley, you can get the force of the scale bucket support, and compare the force with the weight read by the load cell For comparison, the scale can be calibrated. By constantly adjusting the weight of the weight suspended by the second end of the cable, repeating this process successively can complete the calibration. The structure of the calibration scale can multiply the force of the support of the scale bucket through the fixed pulley group, and the purpose of calibrating the scale of the batching scale with a larger range can be realized by using a heavy object with a smaller range than the batching scale, which solves the problem of calibrating the scale. The process needs to meet the condition that the total weight of the heavy objects is close to the range of the batching scale, which leads to the problem of using heavy objects such as too many weights in a calibration process, and at the same time reduces the labor intensity of the calibration staff. In addition, the school scale structure only needs to be modified on the basis of the original scale body, and the structure is simple and practical.

As a further improvement, the positions of the fixed supports of the fixed pulleys of the fixed pulley group 1 and the fixed pulley group 2 in the horizontal direction can be adjusted. The fixing part at the first end of the cable, the position of the fixing part in the horizontal direction can be adjusted.

The beneficial effects are: because the accuracy is not easy to guarantee when the fixed pulley is installed, or the calibration scale structure is frequently used, so that when the flexible cable winds around each pulley, each section of the flexible cable that is not in contact with the pulley cannot maintain a vertical state, resulting in the calibration of the scale. The structure cannot guarantee the calibration accuracy. At this time, the position of the fixed support corresponding to the pulley can be adjusted in the horizontal direction, and the position of the fixing part for fixing the first end of the flexible cable can be adjusted in the horizontal direction, so that the flexible cable remains vertical, so that The structure of the calibration scale can ensure the accuracy of the calibration scale through the above-mentioned simple adjustment method, which greatly improves the efficiency of the calibration scale at the production site.

As a further improvement, the second end of the cable is connected to a tray, and the tray is used for placing weights.

The beneficial effect is: after the second end of the flexible cable used for hanging heavy objects is connected to the tray, it is convenient to directly put the weight or weight substitute directly into the tray when the scale is calibrated, and the weight can be increased or decreased according to the scale calibration range , The method of directly adding or subtracting weights in the tray helps to improve the portability of the calibration scale.

As a further improvement, the second end of the cable is connected to the pallet using a hook.

The beneficial effect is: use the hook to connect the second end of the cable with the pallet, and the pallet can be directly hung on the hook when the scale is calibrated, and the pallet can be easily removed from the hook after the scale calibration is completed, and the hook structure facilitates the use of the pallet operation.

As a further improvement, a storage frame for storing weights is also included, and the storage frame is arranged on the weighing frame.

Beneficial effects: since the scale needs to be calibrated frequently, the weights are directly placed around the scale body for the convenience of taking the weights, and a storage box specially used for placing the weights is set on the scale frame, which is convenient for taking the weights at the same time It also reduces the risk of losing weights.

As a further improvement, the flexible cable is a steel wire rope.

The beneficial effect is that the steel wire rope has better strength and can prevent fractures in the process of calibrating the scale to the greatest extent.

As a further improvement, the diameter of the steel wire rope is equal to the groove depth of each pulley of the first fixed pulley block and the second fixed pulley block.

The beneficial effect is: after the wire rope winds around each pulley in the fixed pulley block 1 and the fixed pulley block 2, if the diameter of the wire rope is obviously larger than the depth of the groove of the pulley, even if the horizontal position of each pulley is adjusted, it is still easy to cause non-contact with each pulley Each segment of the steel wire rope cannot accurately maintain the vertical direction and affect the force analysis, which in turn has a greater impact on the calibration results. And if the diameter of the wire rope is equal to the groove depth of the pulley, then when arranging the horizontal position of each pulley, it is only necessary to make the grooves of each pulley in the pulley block 1 and the fixed pulley block 2 overlap in the vertical direction in turn, so that That is to say, the steel wire rope outside the groove of the pulley and not in contact with the pulley can be kept in a vertical direction, and finally the accuracy of the scale can be improved.

As a further improvement, the weighing bucket support is provided with a weight rack for placing weights, so as to put weights into the weight rack for rechecking after the calibration of the scale is completed.

The beneficial effect is: by setting a weight frame specially used for placing weights on the scale bucket support, it is used to check the above-mentioned calibration results after the calibration step is completed, because the weighing value of the load cell is the same as the scale The total weight of the bucket support and the scale bucket, and the weight frame is directly set on the scale bucket support, so as long as the weight is put into the weight frame, the load cell can carry out weighing and rechecking, and the rechecking process does not The fixed pulley structure is used to amplify the force multiple, so the review process mainly reviews whether the weighing in the smaller range of the batching scale is accurate, so as to further improve the accuracy of the calibration scale.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is the structural representation of the utility model.

detailed description

The technical terms or scientific terms used in this specification should have the usual meanings understood by those skilled in the art: "first", "second" and similar words used in this specification do not indicate any order, quantity or importance, and are only used to distinguish different components; words such as "connect" or "communication" are not limited to physical or mechanical connections, but may include various forms of connections, whether direct or indirect; ", "Down", "Left", "Right", "Front", "Back", "Far", "Near", "Start", "End", etc. After the absolute position of the relative position changes, the relative positional relationship may also change accordingly; in addition, in the description of this specification, unless otherwise specified, the meanings of "multiple" and "several" are two or more.

For a better understanding of the utility model, the terms involved in the present invention are explained below.

The term "pulley": A pulley is a small wheel with grooves around it that turns around an axis. A simple machine that can rotate around a central axis, consisting of a grooved disc that can rotate around a central axis and a flexible cable (rope, tape, cable, chain, etc.) that spans the disc, is called a pulley. When using a pulley, the pulley whose shaft position is fixed is called a fixed pulley.

In order to better understand the utility model, the embodiments of the invention will be described below in conjunction with the accompanying drawings.

As shown in Fig. 1, a kind of scale calibration structure mainly includes fixed pulley block one 2, fixed pulley block two 4, flexible cable 5, weighing sensor 6.

Among them, the fixed pulley group 1 2 is arranged on the scale bucket support 1, the fixed pulley group 2 4 is arranged on the scale frame 3 or on the ground, and the fixed pulley group 2 4 is located below the fixed pulley group 1 2, and the flexible cables 5 are respectively wound around the fixed pulley group 1 respectively. 2 and each pulley of the fixed pulley group 2 4, after the flexible cable 5 winds each pulley, the first end 51 of the flexible cable 5 is fixed on the scale bucket support 1 or the scale frame 3, and the second end 52 of the flexible cable 5 is used for Suspend the heavy object so that the flexible cable 5 is stressed, and the load cell 6 is arranged between the scale frame 3 and the scale bucket support 1, so as to measure the weight of the scale bucket support 1 and the weight applied to the scale bucket support 1. Other external forces are converted into the weight sum of the corresponding weight for reading.

Because the school scale structure will utilize the principle of the fixed pulley, it is necessary to make the setting of each pulley of the fixed pulley block 2 and the fixed pulley block 2 4 meet the requirements when the flexible cables 5 respectively wind around the pulleys of the fixed pulley block 2 and the fixed pulley block 2 4 respectively. , flexible cable 5 coincides with the tangent of each pulley in the vertical direction.

Since each pulley has two tangents in the vertical direction, and the sections of the cable 5 that are not in contact with each pulley also form two straight lines, the directions of these two straight lines must coincide with the above two tangents to satisfy the requirements of the cable. 5. The orientation of each segment that is not in contact with each pulley is the vertical direction. Specifically, the diameter of the cable 5 can be made to be equal to the depth of grooves of each pulley of the fixed pulley block one 2 and the fixed pulley block two 4. When arranging the horizontal position of each pulley, it is only necessary to make the pulley block one and the fixed pulley block two in turn. The grooves of each pulley can overlap in the vertical direction, so that the cable 5 that is not in contact with the corresponding pulley outside the groove of each pulley can be kept vertical.

It can be understood that the arrangement requirements of the cable 5 and each pulley only need to meet the requirement that the sections of the cable 5 and the pulleys are not in contact with each other to maintain a vertical direction, and it does not matter whether the heights of the pulleys in the fixed pulley block-2 are consistent. Requirement, likewise, the height position of each pulley in the fixed pulley block two 4 also can be different, here does not do special restriction to the height of each pulley in the specific certain fixed pulley block. As long as the height of each pulley in the fixed pulley block one 2 is higher than the height of each pulley in the fixed pulley block two 4, it gets final product.

In order to further ensure that the steel wire rope maintains a vertical direction with each section that is not in contact with the corresponding pulley except for each pulley groove, or it is easier to adjust the fixed pulley block one 2, the fixed pulley block two 4, and the flexible cable 5 to meet the above-mentioned setting requirements. The position of the fixed bearings of each pulley of the fixed pulley group one 2 and the fixed pulley group two 4 in the horizontal direction is designed as a structure that can be adjusted. The horizontal position of the fixed portion 7 of the first end 51 of the 5 is also designed to be adjustable. Here, a horizontal slide rail can be set on the scale bucket support 1 and the scale frame 3, and the bottom of the fixed support of each pulley has a sliding block that cooperates with the slide rail. Block locking bolts.

In the actual scale calibration process, the second end 52 of the cable 5 can be connected to a pallet 8, specifically a hook can be fixed at the second end 52, and the pallet 8 can be hooked with the hook, and the pallet 8 is mainly used for placing Weights or weight substitutes.

The flexible cables 5 in the above-mentioned embodiments can be steel wire ropes.

In other embodiments, a storage frame for storing weights is also provided on the scale frame 3 . The storage frame only needs to be able to accommodate the weights or weight substitutes used in the calibration process.

In some other embodiments, a weight rack for putting in weights is also provided on the scale bucket support 1, so as to put weights into the weight rack for rechecking after the calibration of the scale is completed. Here, the weight frame needs to be fixedly connected with the scale bucket support, so that the weighing weight at this time can be displayed through the load cell during the recheck, and then the weight value read by the load cell can be compared with the weight that has been placed in the weight frame. Compare the weights and double check.

It should be noted that although the specification has shown and described a number of embodiments of the present invention, it is obvious to those skilled in the art that such embodiments are provided by way of example only. Those skilled in the art will think of many modifications, changes and substitutions without departing from the idea and spirit of the present invention. It should be understood that various alternatives to the embodiments of the invention described herein may be employed in practicing the invention. The appended claims are intended to define the scope of protection of the invention and therefore cover modular compositions, equivalents or alternatives within the scope of these claims. Those skilled in the art should know that the embodiments described above are some of the embodiments of the present disclosure, but not all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present utility model.

Claims (8)

1. A scale calibration structure, characterized in that it includes a fixed pulley set (2) arranged on the scale bucket support (1), a fixed pulley set (2) set on the scale frame (3) or the ground and located under the fixed pulley set (2). Two pulleys (4), and flexible cables (5), the scale calibration structure also includes a load cell (6), the load cell (6) is connected to the bucket support (1), the fixed pulley one (2) and the setting of each pulley of the fixed pulley block 2 (4) meet the requirement that when the flexible cable (5) turns around the pulleys of the fixed pulley block 1 (2) and the fixed pulley block 2 (4) respectively The direction of each section of the cable (5) that is not in contact with each pulley is vertical, and the first end (51) of the cable (5) is fixed on the bucket support (1) or the On the scale frame (3), the second end (52) of the flexible cable (5) is used to hang heavy objects to force the flexible cable (5). 2. A scale calibration structure according to claim 1, characterized in that the positions of the fixed supports of the pulleys of the fixed pulley group one (2) and the fixed pulley group two (4) in the horizontal direction can be adjustment, the weighing bucket support (1) and/or the weighing frame (3) is provided with a fixing part (7) for connecting the first end (51) of the cable, and the fixing part (7) is The position in the horizontal direction can be adjusted. 3. A scale calibration structure according to claim 1, characterized in that: the second end (52) of the cable (5) is connected to a tray (8), and the tray (8) is used to place weights . 4. The scale calibration structure according to claim 3, characterized in that: the second end (52) of the cable (5) is connected to the tray (8) by a hook. 5 . The scale calibration structure according to claim 3 , further comprising a storage frame for storing weights, and the storage frame is arranged on the scale frame ( 3 ). 6. A scale calibration structure according to claim 1, characterized in that: the flexible cable (5) is a steel wire rope. 7. A scale calibration structure according to claim 6, characterized in that: the diameter of the wire rope is equal to the groove depth of each pulley of the fixed pulley block one (2) and the fixed pulley block two (4) . 8. A scale calibration structure according to claim 1, characterized in that: said scale bucket support (1) is provided with a weight rack for placing weights, which is used to place weights on the scale after calibration is completed. Put the weight into the weight rack for rechecking.

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