KR101821527B1 - Calibration apparatus for auto hopper scale balance - Google Patents

Abstract

The present invention relates to a calibration device for an automatic hopper balance. According to an embodiment of the present invention, the calibration device for an automatic hopper balance can remove consumption of human resources, inconvenience, and inefficiency, which an existing calibration method of an automatic hopper balance causes. To achieve the purpose of the present invention, according to an embodiment of the present invention, the calibration device for an automatic hopper balance which is a subject to be calibrated includes: a first frame assembly including a first fixing plate, a second fixing plate positioned to be parallel by facing the first fixing plate, and a second support unit connected between the first fixing plate and the second fixing plate; a hydraulic cylinder located between the first fixing plate and the second fixing plate and generating a load; a load cell located between the first fixing plate and the second fixing plate and measuring the load by receiving the load generated; and a load transmitting unit including one or more springs located between the hydraulic cylinder and the load cell and transmitting the generated load to the load cell, and a load transmitting plate located between the hydraulic cylinder and the one or more springs and transmitting the generated load to a hopper.

Description

{CALIBRATION APPARATUS FOR AUTO HOPPER SCALE BALANCE}

The present invention relates to an apparatus for calibrating an automatic hopper scale, and more particularly, to an apparatus for calibrating an automatic hopper scale which can easily check and correct the automatic hopper scale.

The ready-mixed batch plant makes it easier to manufacture ready-mixed concrete using the automated equipment for the series of processes required to produce ready-mixed concrete. In general, when working with concrete mixers, cement and aggregates (sand, gravel) are mixed with water and mixed with shovels to confirm the viscosities of the concrete mixers by eye or tactile sense. However, the ready-mix concrete works were possible for a small amount of work, and in the modern times, a lot of concrete capacity and high-quality ready-mix concrete are required, so a ready-mix concrete plant was developed for producing high quality ready-

The concrete batching plant processes a series of processes in which the input amount of each material is controlled by a meter in proportion to the amount of remicon production and is mixed with a mixer to be transferred to the remicon vehicle. Same as.

As shown in Fig. 1, the transverse type plant which is one type of the ready mixed concrete batch plant includes a coarse aggregate storage tank 1, a remaining aggregate storage tank 2, a coarse aggregate gating gate 3, a fine aggregate gating gate 4, A thick aggregate weighing hopper 5 and a fine aggregate weighing hopper 6 to collect the coarse aggregate and the remaining aggregate and transport the same through the belt conveyor 7. [ The transversal plant also includes water metered and supplied through the water tank 11 and the water metering hopper 12, admixture metered and supplied from the admixture metering hopper 12 and metered and supplied from the cement metering hopper 9, The cement is mixed with the aggregates in the mixer 13 to provide the concrete through the concrete hopper 14. [ And a weighing indicator 15 for indicating the weighing values of all the hoppers.

Among the configurations of the ready-mixed batch plant, the hoppers have an auto-hopper scale balance to accurately measure the heavy weight. Characteristics of auto hopper scale handling large weights Periodic inspection and calibration are a prerequisite for high quality ready-mixers.

In the conventional calibration method, a weight plate having a weight of 20 kg was prepared, and a weight plate was attached to the side of the hopper in order to add weight to the hopper, and the weight was raised and lowered one by one. However, since the hopper is of a relatively large size and requires a weight of several tons corresponding to the actual value to be measured for the inspection and calibration of the hopper, the required weight is eventually reached to dozens, and a large number of weights are put down Conventional methods were forced to follow the labor force requirement and correction inconvenience.

 Moreover, such a conventional calibration method has to be repeated several times in order to obtain a desired weight value of the calibrator. Therefore, there is a need to study a calibration device or a calibration method of a new concept automatic hopper scale in order to eliminate the above-mentioned manpower requirement, correction inconvenience and inefficiency.

SUMMARY OF THE INVENTION The present invention has been made in view of the above needs, and it is an object of the present invention to provide an automatic hopper scale inspection and calibration apparatus capable of eliminating manpower requirements, inconvenience and inefficiency caused by the existing calibration method of the automatic hopper scale .

A second object of the present invention is to provide an automatic hopper scale inspection and calibration apparatus capable of easily achieving desired weight and subtracting weight on an automatic hopper scale so that various levels of calibration targets can be achieved in a short time, Device.

A third object of the present invention is to provide an apparatus for inspecting and calibrating an automatic hopper scale in which the calibration components to be conveyed to the hopper are simplified for application to a fixed hopper since the weight is not required because of the action of the hydraulic pressure and the reaction of the ground have.

A fourth object of the present invention is to provide an inspection and calibration apparatus for an automatic hopper scale in which a calibration device is easily set around a hopper since there is no need to prepare a calibration by directly transferring a heavy weight for inspection and calibration of the automatic hopper scale .

The above object of the present invention can be also achieved by an apparatus for calibrating an auto-hopper scale balance to be calibrated, comprising: a first stationary plate; a second stationary plate positioned parallel to the first stationary plate; A first frame assembly including a first support portion connected between the first fixed plate and the second fixed plate; A hydraulic cylinder positioned between the first fixed plate and the second fixed plate and generating a load; A load cell located between the first fixed plate and the second fixed plate and measuring the load by receiving the generated load; And at least one spring positioned between the hydraulic cylinder and the load cell and delivering the generated load to the load cell and a load transferring unit including a load transferring unit including a hydraulic cylinder and a load transfer plate positioned between the at least one spring and transferring the generated load to the hopper The present invention can be achieved by providing a calibration apparatus for an automatic hopper scale including

Both ends of the load transmission plate may further include a pair of hopper connections connected to both sides of the hopper.

The pair of hopper connections may include a hopper connection rod and a hopper connection chain.

The load transmission portion may further include a pair of extension plates connected to the both sides of the load transmission plate in the longitudinal direction.

A spring setting plate may be further included between the at least one spring and the load cell.

The first support portion may include at least one guide rod, and the spring setting plate may be formed with at least one guide hole, and may be guided up and down based on the load along the at least one guide rod.

According to an embodiment of the present invention as described above, it is possible to eliminate manpower required, inconvenience and inefficiency caused by the existing calibration method of the automatic hopper scale.

In addition, the automatic hopper scale can easily add and subtract the desired weight, thereby achieving multiple levels of calibration goals in a short time, thereby improving the efficiency of calibration.

Because of the use of hydraulic action and ground reaction, there is no need for weights, so calibration components to be transported to the hopper for application to a fixed hopper are simplified.

Furthermore, there is no need to prepare a calibration by directly transferring heavy weights for inspection and calibration of the automatic hopper scale, so that it is easy to set the calibration device around the hopper.

1 is a schematic view showing an example of a ready-mixed batch plant provided with an automatic hopper scale,
FIG. 2 is a perspective view of a calibration apparatus for an automatic hopper scale according to a first embodiment of the present invention,
3 is a perspective view of a calibration apparatus for an automatic hopper scale according to a second embodiment of the present invention,
FIG. 4 is a view illustrating a state where a calibration apparatus for an automatic hopper scale according to a second embodiment of the present invention is applied to a hopper,
5 is a perspective view of a modification of the automatic hopper scale calibration apparatus according to the first embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings and accompanying drawings, but the present invention is not limited to or limited by the embodiments.

Various modifications may be made to the embodiments described below. It is to be understood that the embodiments described below are not intended to limit the embodiments, but include all modifications, equivalents, and alternatives to them.

The terms used in the examples are used only to illustrate specific embodiments and are not intended to limit the embodiments. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the terms "comprises" or "having" and the like refer to the presence of stated features, integers, steps, operations, elements, components, or combinations thereof, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The terminology used herein is a term used for appropriately expressing an embodiment of the present invention, which may vary depending on the user, the intent of the operator, or the practice of the field to which the present invention belongs. Therefore, the definitions of these terms should be based on the contents throughout this specification.

In the following description of the present invention with reference to the accompanying drawings, the same components are denoted by the same reference numerals regardless of the reference numerals, and redundant explanations thereof will be omitted. In the following description of the embodiments, a detailed description of related arts will be omitted if it is determined that the gist of the embodiments may be unnecessarily blurred.

Automatic Hopper  Calibration device of scale

One embodiment of the automatic-hopper scale balance calibrator according to the present invention is installed on an automatic hopper scale to be calibrated without manual operation by a weight so that a reference load-specific inspection and calibration of the automatic hopper scale can be performed .

Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 2 to 5. FIG.

2 is a perspective view of a calibration apparatus for an automatic hopper scale according to a first embodiment of the present invention. 2, a first embodiment of an automatic hopper scale calibration apparatus includes a first frame assembly 110, a hydraulic cylinder 120 located within the first frame assembly 110 and generating and measuring loads, A load cell 130, and a load transfer unit 140 located between the hydraulic cylinder 120 and the load cell 130. Here, the load transfer unit 140 may include at least one spring 142 and a load transfer plate 144.

The first frame assembly 110 includes a first stationary plate 112, a second stationary plate 114 positioned parallel to the first stationary plate 112, And a first support portion 116 connected between the plates 114. The first fixing plate 112 and the second fixing plate 114 are fixed at regular intervals. A first support portion 116 is connected between the stationary plates 112, 114 for relative securing between the stationary plates 112, 114. As shown in FIG. 2, the first support portion 116 is provided with four guide rods, each having a long rod shape at each corner, and the ends of the guide rods are fixed to the first and second fixing plates 112 and 112 The first and second fixing plates 112 and 114 may be screwed to each of the fixing plates 114 but not limited to the shape and the coupling method thereof. And may be connected in a plate form.

The first frame assembly 110 aligns the hydraulic cylinder 120 and the load cell 130 which will be described later between the first and second fixing plates 112 and 114 so as to be in the correct position, And is fixed to the ground by an anchor (not shown) in order to directly transfer the load generated by the hydraulic cylinder 120 to the load transmitting portion 140. The method of fixing the first frame assembly 110 to the ground with an anchor may be variously configured, but the easiest example is to fix the second fixing plate 114 to the ground with an anchor, ) May be connected to the ground and fixed.

The hydraulic cylinder 120 generates a load in a direction perpendicular to the surfaces of the first and second fixing plates 112 and 114. The hydraulic cylinder 120 preferably uses a hydraulic jack capable of generating a strong force with a small movement, and can use a pump-integrated type or a pump-separated type hydraulic jack. With the operation of the hydraulic pump, the ram of the hydraulic jack can create a load by pushing the first fixing plate 112 or the load transfer plate 144. A hydraulic opening may be formed on the outer circumferential surface of the hydraulic cylinder 120 to generate a load, to which a hydraulic pump is connected.

This hydraulic jack can exert a large force in a narrow space, so that the hydraulic pressure supplied from the hydraulic pump transfers a large force to the ram inside the cylinder, so that a desired load can be generated.

The load cell 130 is positioned between the first and second fixing plates 112 and 114 and measures the load by receiving the generated load. The load cell 130 is changed in load by the operation of the hydraulic pump, and accurate load measurement for calibration can be performed through the load cell 130. Therefore, it is possible to prevent the calculation of the load based on the existing number of weight groups in advance.

The load transfer unit 140 is positioned between the hydraulic cylinder 120 and the load cell 130 and serves to transfer the load generated by the hydraulic cylinder 120 to the hopper H and the load cell 130, respectively. The load transfer unit 140 may include at least one spring 142 and a load transfer plate 144.

The load transfer unit 140 is configured to transmit a load for measurement in the load cell 130 of the generated load. The load transfer unit 140 includes at least one spring 142, Shape, or plate shape, and the shape and material thereof are not limited. However, the at least one spring 142 preferably has a large elastic modulus so that a large load can be transmitted. When the at least one spring 142 is in the form of a coil as shown in FIG. 2, the load transmission portion 140 between the load cell 130 and the load cell 130 may be configured to further include the spring setting plate 145.

The load transfer unit 140 includes a load transfer plate 144. The load transfer plate 144 is configured to transfer a load to an external hopper H. [ The load transfer plate 144 may further include a pair of hopper connections 150a and 150b connected to both sides of the hopper H at both ends thereof. The pair of hopper connections 150a and 150b may be configured to include hopper connection rods 152a and 152b and hopper connection chains 154a and 154b.

The load transfer plate 144 is preferably made of a steel plate 45C which is heat-treated to a spring-loaded spring steel plate or a general steel plate. This is to prevent warping and deformation. Or may be constructed by attaching an extension plate as in the second embodiment described below.

The first support portion 116 includes one or more guide rods so that the load transmission plate 144 can be guided through the guide rods inserted into the guide holes formed at the four corners and can be moved up and down . The spring setting plate 145 is also formed with guide holes at four corners and is vertically guided along the at least one guide rod based on the load, so that the spring setting plate 145 can move up and down. Through these arrangements, the load can be accurately transferred to the load cell 130 or the hopper H.

3 is a perspective view of a calibration apparatus for an automatic hopper scale according to a second embodiment of the present invention. As shown in Fig. 3, the second embodiment correcting apparatus 101 is configured to further include the extension plates 146 and 148, including all the configurations of the first embodiment. The hopper connection portions 150a and 150b are formed in the extension plates 146 and 148 so that the present invention can be applied to a larger hopper H and a variable inspection and calibration can be performed according to the hopper H. It is also preferable to use spring steel plates or heat treat the general steel plates to prevent warp deformation.

4 is a view showing a state where a calibration apparatus for an automatic hopper scale according to a second embodiment of the present invention is applied to a hopper. A method of inspecting and calibrating an automatic hopper balance using the second embodiment will be described below with reference to FIG. The hopper (H) weighs large aggregates such as gravel, sand and concrete. Periodic inspection and calibration are therefore required for the measurement accuracy of the automatic hopper scale (not shown) mounted on the hopper (H).

The inspection and calibration method of such an automatic hopper scale first checks and calibrates the automatic hopper scale by creating a load and comparing the generated load with the load read from the automatic hopper scale.

To this end, as shown in FIG. 4, the hopper H is provided with a pair of hooks so that a pair of hopper connecting portions 150a and 150b can be connected to both sides thereof. For an even load distribution, it is preferable that the pair of hangers are formed to be symmetrical.

First, a load is generated by the hydraulic cylinder 120 of the present invention. The load generated between the ground and the fixed second fixed plate 114 and the fixed plate 112 is transmitted to the load transfer plate 144 and the extension plates 146 and 148. Subsequently, the hopper H is pulled through the hopper connection portions 150a and 150b to transfer the load to the hopper H and the metering value read to the automatic hopper scale is recorded as the metering value of the automatic hopper scale to be calibrated.

Meanwhile, the load generated by the hydraulic cylinder 120 is transmitted to the load cell 130 through the at least one spring 142, so that the worker can check the load transferred to the hopper H. To this end, the load cell 130 is configured to draw a signal through a terminal formed on the outer circumferential surface and to display a measurement value corresponding to a signal drawn to an external monitor (not shown). The operator can ascertain through the monitor how much load his hydraulic pump operation generates and can easily change the number of reference loads to be inspected.

Inspection and calibration of the automatic hopper balance to be calibrated can be performed through comparison of the measured weighing values of the automatic hopper balance with the weighing values measured at the load cell 130 at a specific load.

5 is a perspective view of a modification of the automatic hopper scale calibration apparatus according to the first embodiment of the present invention. 5, the modification 102 includes the third fixing plate 212, the fourth fixing plate 214, and the second supporting portion 216, including the configurations of the first embodiment as described above. And a second frame assembly (210). In this case, the fourth fixing plate 214 is fixed to the ground with an anchor or the like so that the second frame assembly 210 of the first embodiment 2 stationary plate 114. [0034]

This variant is particularly effective in the calibration device of the first embodiment, in which the first frame assembly 110 acts as a housing for receiving internal configurations and facilitates the transport of the calibration device for inspection, while the second frame assembly 210 Is fixed to the surface of the hopper H to be operated and can be utilized as a configuration for accommodating the calibrating device of the first embodiment, thereby improving the efficiency of the calibrating operation.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood that the invention may be practiced. It is therefore to be understood that the embodiments described above are to be considered in all respects only as illustrative and not restrictive. In addition, the scope of the present invention is indicated by the following claims rather than the above detailed description. Also, all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included within the scope of the present invention.

H: Hopper
100, 101, 102: calibration device
110: first frame assembly
112: first fixing plate
114: second fixing plate
116: first support portion
120: Hydraulic cylinder
130: load cell
140:
142: 1 or more springs
144: load transfer plate
145: spring setting plate
146, 148: extension plate
150a, 150b: Hopper connection
152a, 152b: hopper connecting rod
154a, 154b: hopper connecting chain
210: second frame assembly
212: third fixing plate
214: fourth fixing plate
216: second support portion

Claims (5)

1. An apparatus for calibrating an auto-hopper scale balance to be calibrated,
A first frame assembly including a first fixing plate, a second fixing plate positioned parallel to the first fixing plate, and a first support portion connected between the first fixing plate and the second fixing plate;
A hydraulic cylinder positioned between the first fixed plate and the second fixed plate and generating a load;
A load cell located between the first fixed plate and the second fixed plate and configured to receive and measure the generated load;
At least one spring disposed between the hydraulic cylinder and the load cell and transmitting the generated load to the load cell; and a load transfer plate positioned between the hydraulic cylinder and the at least one spring and transferring the generated load to the hopper A load transfer part including a load transfer part;
A spring setting plate disposed between the at least one spring and the load cell; And
And a pair of hopper connection portions connected to both sides of the hopper at both ends of the load transmission plate,
Wherein the first support portion includes at least one guide rod,
Wherein the load transmission plate and the spring setting plate are formed with at least four guide holes vertically passing through four corners surrounding at least the hydraulic cylinder,
Wherein the at least one guide rod is inserted into each of the four guide holes so that the load transfer plate and the spring setting plate can move up and down.
delete The method according to claim 1,
Wherein the pair of hopper connections comprises a hopper connection rod and a hopper connection chain
Of the automatic hopper scale.
The method according to claim 1,
The load transmission portion includes a pair of extension plates connected to each other in the longitudinal direction of the load transmission plate,
Wherein the automatic hopper scale further comprises:
delete

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