CN113295252A

CN113295252A - Active weighing electronic weighing apparatus

Info

Publication number: CN113295252A
Application number: CN202010109763.5A
Authority: CN
Inventors: 李艳; 滕冠军; 魏纯
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-02-22
Filing date: 2020-02-22
Publication date: 2021-08-24

Abstract

The invention relates to an active weighing electronic weighing apparatus, which mainly comprises a bearing platform, one or more weighing sensors, an active weighing loader, a bearing positioning support, a data processing device, a weighing indicator, a driving system and the like. The newly added active weighing loader is arranged at one end of the weighing sensor; the active weighing loader is utilized to drive the weighing sensor to lift so as to control whether the weighing sensor is in a working (weighing) state or not. When not weighing, weighing sensor's one end is virtually put, even if load heavy object on the bearing platform like this, the sensor does not bear gravity yet, and impact and temperature when having avoided loading heavy object lead to the bearing platform expend with heat and contract with cold to the influence of sensor. When weighing, the active weighing loader ensures that both ends of the weighing sensor are not arranged in a virtual way, and the gravity is completely born by the weighing sensor, thereby achieving the purpose of weighing.

Description

Active weighing electronic weighing apparatus

Technical Field

The invention relates to an electronic weighing apparatus, in particular to a large-scale electronic weighing apparatus.

Background

With the development of science and technology, electronic weighing instruments are already common. An electronic weighing apparatus is generally composed of a load-bearing platform, one or more weighing sensors, a data processing device, a weighing indicator, and the like. The weight on the bearing table transfers the gravity to the weighing sensor, the weighing sensor converts the change caused by the gravity into an electric signal, and the electric signal is reflected to the weighing indicator by a data processing device through numbers. This way of placing the weight and weighing it immediately, we define passive weighing.

The electronic weighing apparatus is an indispensable device in industries such as industry, agriculture, transportation, commerce and the like. For many years, a problem has been troubling manufacturers and users of large electronic scales. The weighing error of the large electronic weighing apparatus is greatly influenced by the outside. Such as temperature changes and impacts when loading heavy objects.

Taking a common truck scale as an example, a bearing platform of the truck scale is made of steel, and the bearing platform is combined with a spherical seat on a weighing sensor through a spherical seat and a spherical body. The purpose of this is to expect that the weight of the load-bearing platform and the weight can be loaded vertically onto the load cell in order to obtain an accurate measurement. In addition, the combination of the spherical seat and the spherical body can also limit the horizontal movement of the bearing platform. However, the length change of the bearing platform of the large-scale truck scale due to the temperature change can reach more than 10 mm, so that the combination of the spherical seat and the spherical body can deviate, and the weighing error of the weighing apparatus is further influenced. .

Disclosure of Invention

Different from the prior passive weighing, the weighing structure of the weighing apparatus, particularly the combination of the bearing table and the weighing sensor, adopts a brand new design on the basis of carefully analyzing the causes of the problems. Whether the weighing sensor works or not can be controlled, so that the weighing is actively weighed, and the weighing error caused by the problems can be effectively reduced.

The invention relates to an active weighing electronic weighing apparatus, which mainly comprises a bearing platform, a plurality of weighing sensors, an active weighing loader, a bearing positioning support, a data processing device, a weighing indicator, a driving system and the like.

The newly added active weighing loader is arranged at one end of the weighing sensor; driving a weighing sensor to lift by using an active weighing loader so as to control whether the weighing sensor is in a working (weighing) state or not; when not weighing, weighing sensor's one end is virtually put, even if load the heavy object on the bearing platform like this, the sensor does not bear gravity yet, the impact when having avoided loading the heavy object. When weighing, the active weighing loader ensures that both ends of the weighing sensor are not arranged in a virtual way, and the gravity is completely born by the weighing sensor, thereby achieving the purpose of weighing.

The virtual weighing sensor that puts, the effectual weighing error that has completely cut off the bearing platform expend with heat and contract with cold and lead to that arouses by temperature change also avoided the impact to the sensor when suddenly loading gravity.

The active weight loader may be a hydraulic drive.

Alternatively, the active weight loader may be a mechanical drive, but is not limited thereto.

The active weighing electronic weighing apparatus uses the V-shaped positioning support to replace the original spherical positioning support on the bearing positioning support structure so as to limit the horizontal movement of the bearing table. And the weighing sensor does not participate in positioning work, so that the influence of temperature-thermal expansion and cold contraction on weighing can be effectively reduced.

The V-shaped support consists of a V-shaped groove and a V-shaped block. The number of the V-shaped supports is determined according to the size and the bearing capacity of the weighing apparatus.

The V-shaped cross positioning supports are formed by a plurality of V-shaped supports which are arranged in a line along the longitudinal direction and a plurality of V-shaped supports which are arranged in a line along the transverse direction. Therefore, the horizontal displacement limitation of the bearing platform can be effectively realized.

The axes of the longitudinal V-shaped supports and the transverse V-shaped supports are preferably arranged in a criss-cross manner.

Furthermore, a plurality of plane supports are arranged beside the V-shaped supports, the plane supports assist the V-shaped supports to share the gravity in the vertical direction, and the plane supports and the auxiliary V-shaped supports form a foundation support; the foundation support only functions when not weighed.

The number and the layout of the plane supports are determined according to the size of the weighing apparatus and the size of the bearing capacity.

When weighing, the sensor bears the gravity of the bearing table and the weight, and the V-shaped support is separated from the plane support and the bearing table and is in a non-bearing state; when the weighing is not carried out, the sensor is not loaded, and the V-shaped support and the plane support are both in a pressure-bearing state.

When the weighing machine is not used for weighing, one end of the weighing sensor is connected with the active weighing loader and is positioned between the foundation and the bearing platform, and is only in rigid connection with one of the foundation or the bearing platform; therefore, the impact of the weighing sensor during loading of the heavy object can be avoided, and the weighing error caused by thermal expansion and cold contraction caused by temperature can be reduced.

During weighing, the active weighing loader drives the weighing sensor to jack up the bearing platform, the bearing platform is lifted, and the V-shaped support and the plane support are separated from contact. The gravity of the heavy object and the bearing platform is completely transmitted to the weighing sensor, so that weighing is realized.

Drawings

FIG. 1 is a schematic diagram of a conventional bridge load cell;

FIG. 2 is a schematic diagram of a load cell arrangement for a large electronic scale;

FIG. 3 is a schematic view showing the change of the ball body force caused by the change of the heated dimension of the bearing table;

FIG. 4 is a schematic view of a "V-shaped support";

FIG. 5 is a schematic view of the arrangement of the "V-shaped cross positioning support" and the "plane support";

FIG. 6 is a load cell incorporating an active weigh loader;

FIG. 7 is a view of a load cell incorporating an active weight loader in an inoperative condition.

FIG. 8 is a view of a load cell incorporating an active weigh loader in operation.

The figure shows 1 is a bridge type weighing sensor, 11 is a sphere, 12 is a spherical seat, 13 is a data line interface, and 14 is a sensor base; 2 is a V-shaped support, 21 is a V-shaped concave block, and 22 is a V-shaped convex block; 3 is a planar support; 4 is a bearing table, 41 is a heavy object; 5 is a stress point; 6, a cylindrical weighing sensor, 61, a spherical pad, 62, 63 and 64, wherein the cylindrical weighing sensor is a cylindrical weighing sensor, the spherical pad is a spherical pad, the anti-falling bolt is a sensor data line interface, and the fastening bolt is a cylindrical weighing sensor; 7 is the initiative loader of weighing, 71 is the plunger, 72 is the oil circuit connector, 73 is the hydro-cylinder body, 74 is the sealing washer, 75 is the fixing base.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings of the embodiment of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Fig. 1 shows a bridge-type weighing cell 1 commonly used in large electronic weighing apparatus. In the figure, the ball 1 is placed in the upper spherical seat of the sensor, the upper spherical seat 12 is connected with the bearing table 4, and the sensor base 14 is fixed on the foundation, which is usually a concrete structure. A data line interface 13 is arranged on one side of the bridge-type weighing cell 1.

Fig. 2 is a schematic view of a load cell arrangement of a large electronic scale. The bridge sensor 1 is fixed on the lower base, and the upper ball and surface seat 12 is connected with the bearing table 4. When the temperature changes, the size of the foundation of the concrete structure changes slightly, and the temperature and the size of the bearing table 4 of the steel structure change greatly, so that the stress point 5 of the spherical ball 11 deviates from the center, and a horizontal component force is formed when the stress is applied. A mechanical "wedge" effect is formed between the plurality of sensors 1. Moreover, this point of force 5 is in an unstable state. This is also a major factor in weighing errors due to temperature variations.

As can be seen from fig. 3, the force point 5 is clearly off-center; the stress point state varies with the change of the magnitude of the loading gravity and other factors. This also results in a large weighing error that is difficult to avoid even if cleared before each weighing.

In large electronic scales, a large, expensive bridge-type weighing cell 1 is usually used, because it can withstand large horizontal force components.

Fig. 4 is a schematic view of the V-shaped support 2, and the V-shaped support 2 is composed of a V-shaped concave block 21 and a V-shaped convex block 22. The upper part and the lower part of the V-shaped support 2 are respectively connected with the bearing platform 4 and the foundation.

In fig. 5 we see the V-shaped supports 2 and the planar supports 3 arranged below the load-bearing table 4. several V-shaped supports 2 are arranged in a cross-shape, which limits the movement of the load-bearing table 4 in the horizontal plane (but does not include temperature induced thermal expansion and contraction). The planar supports 3 arranged beside the V-shaped supports 2 are subjected to vertical gravitational forces only. The 'plane support' and the 'V-shaped support' are both of separable structures.

Fig. 6 is a combination of a column load cell 6 and an active weigh loader 7. The column type weighing sensor 6 has small volume, easy manufacture and low cost. The spherical pad 61 on the top of the pillar type load cell 6 has the same spherical diameter as the hemisphere below, so that the two have larger contact area. The spherical pad 61 can swing freely in a small range, and the anti-falling bolt 62 ensures that the spherical pad cannot fall off.

Below the pillar load cell 6 is an active load cell 7, which is connected by fastening bolts 64. In the embodiment, the active weighing loader 7 adopts an oil cylinder device, so that the uniform stress of each weighing sensor is easier to ensure. The active weighing loader 7 comprises a cylinder body 73, a plunger 71, a sealing ring 74, an oil way joint 72 and the like, wherein the lower part of the cylinder body is provided with a base 75, and the base 75 is used for fixing the active weighing loader 7.

Fig. 7 is a schematic diagram of the active weighing electronic scale incorporating the column load cell 6 and the active weight loader 7, but both are not in operation. The gravity generated by the bearing platform 4 and the weight 41 on the platform is borne by the V-shaped support 2 and the plane support 3. The spherical pad 61 at one end of the column-type weighing sensor 6 is not contacted with the bottom surface of the bearing table 4 and is in a virtual state. The active weight loader 7 is fixed on the foundation using a base 75. The combination of the pillar load cell 6 and the active load cell 7 shown in the figures can also be inverted, either by fixing the active load cell 7 under the load-bearing table by means of a base 75, with the pillar load cell 6 hanging down above the foundation.

Fig. 8 is a schematic diagram of the active weight loader 7 driving the pillar type load cell 6 to work, and the plunger 71 is lifted up under the action of the oil pressure to drive the pillar type load cell 6 to ascend, and to jack up the bearing platform 4 and the weight 41 thereon, and it can be seen that the upper and lower parts of the V-shaped support 2 and the plane support 3 are separated. The weight force generated by the bearing table 4 and the weight 41 on the table is loaded on the column-type weighing sensor 6.

The hydraulic system for driving the active weighing loader 7 in this embodiment is a conventional hydraulic system; of course, the active weight loader 7 and the drive are not limited to hydraulic systems, but mechanical screw drives and the like may be used. The required driving system has no special requirements, and the existing driving system can be adopted. Therefore, the description is omitted.

The overview is as follows: first, the active weighing electronic scale takes the weight of the load bearing platform and the weight 41 with the fixed and separable V-shaped support and the planar support. Then, the column-type weighing sensor 6 is jacked up by the active weighing loader 7 to jack up the bearing platform 4 and the weight 41, the V-shaped support and the plane support are separated evenly, and the gravity of the bearing platform 4 and the weight 41 is borne by the weighing sensor completely to realize weighing. The V-shaped support limits the horizontal movement of the bearing platform when bearing.

The active weighing loader 7 is used for driving the weighing sensor 6 to lift, and the active control of whether weighing is carried out or not is the key point of the invention.

And a hydraulic system and an oil cylinder are used, so that uniform load of each weighing sensor is facilitated.

The V-shaped supports are preferably arranged in a cross shape, but can be arranged in a T shape or an H shape, and the like.

The data processing device, the weighing indicator, the hydraulic drive and the like all adopt the prior art, and are not described in detail.

Claims

1. The utility model provides an electronic weighing apparatus of initiative weighing, its mainly by bearing platform, weighing sensor and initiative loader of weighing, bearing location support, data processing apparatus and weighing indicator and actuating system etc. constitute which characterized in that: driving the weighing sensor to lift by using the active weighing loader to control the working state of the weighing sensor; each weighing sensor is provided with an active weighing loader which can control whether the weighing sensor works or not; the combination body of the weighing sensor and the active weighing loader is rigidly connected with one of the bearing platform and the foundation; the bearing platform is supported by a V-shaped support and a plane support as a foundation; the V-shaped support consists of a V-shaped block and a V-shaped groove which can be separated from each other up and down.

2. The active weighing electronic scale of claim 1, wherein: the active weighing loader is an oil cylinder, and the driving system is a hydraulic system.

3. The active weighing electronic scale of claim 1, wherein: the plurality of V-shaped supports are arranged in a cross shape to form a cross positioning support for limiting the horizontal movement of the bearing platform.

4. The active weighing electronic scale of claim 1, wherein: when the weighing sensor is in a non-working state, one end of the weighing sensor is arranged in a virtual mode.

5. The active weighing electronic scale of claim 1, wherein: the plurality of V-shaped supports are arranged in a cross shape to form a cross positioning support for limiting the horizontal movement of the bearing platform.