Metering scale with loading calibration function

Abstract

The utility model provides a metering scale with a loading calibration function, and the metering scale comprises a supporting frame which comprises a first cross beam and a second cross beam which are arranged in a first direction; the scale body is connected with the first cross beam and the second cross beam through a plurality of weighing sensors and is hung between the first cross beam and the second cross beam; the loading mechanism comprises a loading assembly and a pressure applying piece, the pressure applying piece is installed on the first cross beam, the pressure applying piece comprises a telescopic pressure applying part, the loading assembly is connected with the pressure applying part and the side wall of the weighing body, and the pressure applying part downwards presses the loading assembly to load the weighing body; and the pressure sensor is arranged at the connecting position of the pressure applying part and the loading assembly. The metering scale provided by the utility model has a function of facilitating calibration.

Description

Technical Field

[0001] The present disclosure generally relates to the technical field of weighing scales, and in particular to a weighing scale with a loading and calibration function. Background Art

[0002] When producing asphalt mixture, it is necessary to weigh aggregate, asphalt, powder, RAP, additives and other materials. Although the weighing scales used to weigh different materials are different in terms of structure style, specification size, range, etc., their work is far from the same. The weighing scale needs to be calibrated after the initial installation, relocation and reinstallation, and renovation and upgrading of fire equipment after a period of normal use to ensure that the working performance and measurement accuracy of the weighing scale meet the requirements.

[0003] At present, the standard weight symmetrical body loading method is generally used to calibrate the measuring scale, which is referred to as weight calibration. Although the weight calibration method is mature, when calibrating a measuring scale with a large range, a large number of weights are required, and the weights need to be moved manually, resulting in a complicated calibration process and low calibration efficiency. Summary of the invention

[0004] In view of the above defects or deficiencies in the prior art, it is desirable to provide a weighing scale with a loading calibration function to solve the above problems.

[0005] The present application provides a weighing scale with a loading calibration function, comprising:

[0006] A support frame, the support frame comprising a first crossbeam and a second crossbeam arranged along a first direction;

[0007] A weighing body, which is connected to the first crossbeam and the second crossbeam through a plurality of weighing sensors and is suspended between the first crossbeam and the second crossbeam;

[0008] A loading mechanism, the loading mechanism comprising a loading assembly and a pressure member, the pressure member being mounted on the first crossbeam, the pressure member comprising a retractable pressure portion, the loading assembly connecting the pressure portion and the side wall of the scale body, the pressure portion pressing down the loading assembly to load the scale body;

[0009] A pressure sensor is arranged at a connection position between the pressure applying portion and the loading assembly.

[0010] According to the technical solution provided in the embodiment of the present application, the loading component includes:

[0011] A connecting rod, the connecting rod is arranged on a side of the scale body close to the pressure member and is placed on a side of the pressure member away from the first beam; the pressure member presses down the connecting rod to load the scale body;

[0012] A pair of loading rods, the pair of loading rods are arranged along a second direction and are respectively disposed on opposite sides of the weighing body, the second direction being perpendicular to the first direction; one end of the loading rod is hinged to the end of the connecting rod to form a first hinge point, and the other end is hinged to the second cross beam to form a second hinge point. A third hinge point is formed by hinging between the two ends of the loading rod and the side wall of the weighing body, and the loading rod forms a lever structure with the second hinge point as the fulcrum.

[0013] According to the technical solution provided by the embodiment of the present application, the pressing part corresponds to the middle position of the connecting rod.

[0014] According to the technical solution provided by the embodiment of the present application, the support frame further includes a pair of limiting rods, the pair of limiting rods are arranged along the second direction and are respectively disposed on opposite sides of the weighing body, and both ends of the limiting rods are respectively connected to the first cross beam and the second cross beam.

[0015] According to the technical solution provided by the embodiment of the present application, a hoisting part is provided on the first cross beam and the second cross beam, a hanging part corresponding to the hoisting part is provided on the weighing body, and one end of the weighing sensor is connected to the hoisting part and the other end is connected to the hanging part.

[0016] According to the technical solution provided by the embodiment of the present application, there is an overlapping part between the projection of the hanging part and the first cross beam or the second cross beam in a third direction, the third direction being perpendicular to the first direction and perpendicular to the second direction.

[0017] According to the technical solution provided by the embodiment of the present application, the support frame further includes a plurality of support feet, the plurality of support feet are respectively installed at the ends of the first cross beam and the second cross beam, and the support feet extend along the third direction.

[0018] According to the technical solution provided by the embodiment of the present application, the corresponding ends of the first cross beam and the second cross beam are connected by a reinforcing beam.

[0019] According to the technical solution provided by the embodiment of the present application, it further includes a controller, and the controller includes:

[0020] A processing module, the processing module is electrically connected to the pressure sensor, and the processing module is configured to calculate the load applied to the weighing body according to the first arm of force, the second arm of force and the value of the pressure sensor; the first arm of force is the distance between the first hinge point and the second hinge point, and the second arm of force is the distance between the third hinge point and the second hinge point;

[0021] A touch screen, the touch screen is configured to input the first arm of force and the second arm of force, and is also configured to display the load.

[0022] Compared with the prior art, the beneficial effects of the present application are as follows: By suspending the weighing body between the first cross beam and the second cross beam with a load cell, the weight of the material to be weighed can be obtained by reading the indication on the load cell; By setting a loading assembly and a pressing member, the pressing member is installed on the first cross beam, and the pressing part of the pressing member presses the loading assembly downward, and then the loading assembly acts the load provided by the pressing member on the weighing body. Different loads can be applied to the weighing body only by changing the pressure applied by the pressing member, which is convenient for loading and improves the efficiency of calibrating the weighing scale; By setting a pressure sensor, the load applied to the weighing body can be detected in real time. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Other features, objects, and advantages of the present application will become more apparent by reading the detailed description of the non-limiting embodiments with reference to the following drawings:

[0024] Figure 1 It is a schematic structural view of a weighing scale with a loading and calibration function provided by the present application;

[0025] Figure 2 is Figure 1 Another perspective structural view of the weighing scale with a loading and calibration function shown.

[0026] Reference numerals in the drawings: 1, support frame; 2, first cross beam; 3, second cross beam; 4, weighing body; 5, load cell; 6, loading assembly; 7, pressing member; 8, pressing part; 9, pressure sensor; 10, connecting rod; 11, loading rod; 12, first hinge point; 13, second hinge point; 14, third hinge point; 15, limiting rod; 16, hoisting part; 17, hanging part; 18, support leg; 19, reinforcing beam. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The present application will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only for explaining the related invention and not for limiting the invention. Additionally, it should be noted that for the convenience of description, only the parts related to the invention are shown in the drawings.

[0028] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the drawings and embodiments.

[0029] Please refer to Figure 1 and Figure 2 , the present application provides a weighing scale with a loading and calibration function, including:

[0030] Support frame 1, the support frame 1 includes a first cross beam 2 and a second cross beam 3 arranged along a first direction;

[0031] Weighing body 4, the weighing body 4 is connected to the first cross beam 2 and the second cross beam 3 through a plurality of weighing sensors 5, and is suspended between the first cross beam 2 and the second cross beam 3;

[0032] Loading mechanism, the loading mechanism includes a loading component 6 and a pressing member 7, the pressing member 7 is installed on the first cross beam 2, the pressing member 7 includes a telescopic pressing portion 8, the loading component 6 connects the pressing portion 8 and the side wall of the weighing body 4, and the pressing portion 8 pressing down the loading component 6 can load the weighing body 4;

[0033] Pressure sensor 9, the pressure sensor 9 is arranged at the connection position between the pressing portion 8 and the loading component 6.

[0034] Specifically, the weighing scale with a loading and calibration function provided by the present application is composed of a support frame 1, a weighing body 4, a loading mechanism and a pressure sensor 9. The support frame 1 mainly includes a first cross beam 2 and a second cross beam 3. The first cross beam 2 and the second cross beam 3 are arranged along a first direction, and the first direction is parallel to the installation plane when the weighing scale is tested. When the installation plane is parallel to the horizontal plane, the first direction is parallel to the horizontal plane; the extending directions of the first cross beam 2 and the second cross beam 3 are parallel to the installation plane and perpendicular to the first direction. The weighing body 4 is suspended between the first cross beam 2 and the second cross beam 3. The side of the weighing body 4 close to the first cross beam 2 is the front side, and the side close to the second cross beam 3 is the rear side; the weighing body 4 freely hangs down under the action of gravity. The weighing body 4 is connected to the first cross beam 2 and the second cross beam 3 through weighing sensors 5 to achieve hoisting. The weighing body 4 is a material hopper. By observing the readings of the weighing sensors 5 when materials are placed in the weighing body 4, the weight of the materials can be calculated. The number of the weighing sensors 5 can be freely set. In this embodiment, three weighing sensors 5 are provided, two of which are connected to the first cross beam 2, and the other is connected to the second cross beam 3. The sum of the weight of the weighed materials and the weight of the weighing body 4 is the sum of the readings of the three weighing sensors 5.

[0035] Specifically, the pressing member 7 is fixed on the bottom surface of the first cross beam 2. The other end of the pressing member 7 is provided with a pressing portion 8 that can freely expand and contract. The pressing portion 8 is arranged downward, and the load is provided by the downward pressure of the pressing portion 8. The loading assembly 6 is used for load transfer. The loading assembly 6 transfers the load to the weighing body 4 by connecting the pressing portion 8 and the outer side wall of the weighing body 4. The pressure sensor 9 is installed on the pressing portion 8. When the pressing portion 8 contacts the loading assembly 6, the pressure sensor 9 detects the pressure applied by the pressing portion 8 in real time. By applying the load through the pressing member 7 and the loading assembly 6, the operation is convenient and the calibration efficiency of the weighing scale is improved.

[0036] Further, the loading assembly 6 includes:

[0037] A connecting rod 10, the connecting rod 10 is arranged on the side of the weighing body 4 close to the pressing member 7 and is located on the side of the pressing member 7 away from the first cross beam 2; the pressing portion 8 presses down the connecting rod 10 to load the weighing body 4.

[0038] A pair of loading rods 11, the pair of loading rods 11 are arranged along the second direction and are respectively arranged on opposite sides of the weighing body 4. The second direction is perpendicular to the first direction; one end of the loading rod 11 is hinged to the end of the connecting rod 10 to form a first hinge point 12, the other end is hinged to the second cross beam 3 to form a second hinge point 13, and the side wall of the weighing body 4 is hinged between the two ends of the loading rod 11 to form a third hinge point 14. The loading rod 11 forms a lever structure with the second hinge point 13 as the fulcrum.

[0039] Specifically, the loading component 6 includes a connecting rod 10 and a pair of loading rods 11. The pair of loading rods 11 are respectively arranged on the left and right sides of the weighing body 4. The loading rods 11 extend along the first direction and are placed below the first cross beam 2 and the second cross beam 3. The connecting rod 10 is arranged on the front side of the weighing body 4 and below the pressing member 7. The connecting rod 10 extends along the second direction. The two ends of the connecting rod 10 are respectively hinged to one ends of the pair of loading rods 11 close to the front side of the weighing body 4, and the hinged position is the first hinge point 12. One end of the loading rod 11 close to the rear side of the weighing body 4 is hinged to the second cross beam 3, and the hinged position is the second hinge point 13. A third hinge point 14 is arranged between the first hinge point 12 and the second hinge point 13 on the loading rod 11, and the third hinge point 14 is the hinged position between the loading rod 11 and the left / right side wall of the weighing body 4. The loading rod 11 can be regarded as a lever structure with the second hinge point 13 as the fulcrum, the part of the loading rod 11 between the first hinge point 12 and the second hinge point 13 as the power arm, and the part of the loading rod 11 between the third hinge point 14 and the second hinge point 13 as the resistance arm. When the pressing part 8 presses down the connecting rod 10, the connecting rod 10 applies a vertically downward pressure at the position of the first hinge point 12, so that the loading rod 11 has a tendency to rotate around the second hinge point 13, and then a vertically downward pressure on the weighing body 4 is generated at the third hinge point 14 to achieve the purpose of providing a load. Since the length of the power arm of the lever structure is greater than the length of the resistance arm, when the pressing part 8 provides a smaller downward pressure, a larger load can be increased on the weighing body 4, thereby increasing the upper limit of the load application.

[0040] Further, the pressing part 8 corresponds to the middle position of the connecting rod 10.

[0041] Specifically, the middle position of the connecting rod 10 is placed directly below the pressing part 8, so that when the pressing part 8 presses down, the load magnitudes at both ends of the connecting rod 10 are equal, and further the loads received on the left and right sides of the weighing body 4 are the same, ensuring the stability of the weighing body 4 during the calibration process.

[0042] Further, the support frame 1 further includes a pair of limiting rods 15. The pair of limiting rods 15 are arranged along the second direction and are respectively arranged on opposite sides of the weighing body 4. The two ends of the limiting rods 15 are respectively connected to the first cross beam 2 and the second cross beam 3.

[0043] Specifically, a pair of the limiting rods 15 are arranged on the left and right sides of the weighing body 4. The limiting rods 15 extend along the first direction. The limiting rods 15 are connected to the first cross beam 2 and the second cross beam 3 to cooperate with the first cross beam 2 and the second cross beam 3 to limit the position of the weighing body 4, so that the weighing body 4 can only move in the up and down directions, avoiding the left and right shaking of the weighing body 4 during calibration or weighing, and improving the stability of the weighing body 4.

[0044] Furthermore, hoisting parts 16 are provided on the first cross beam 2 and the second cross beam 3. Corresponding to the hoisting parts 16 on the weighing body 4, hanging parts 17 are provided. One end of the weighing sensor 5 is connected to the hoisting part 16, and the other end is connected to the hanging part 17.

[0045] Specifically, the hoisting parts 16 are arranged on the tops of the first cross beam 2 and the second cross beam 3 and protrude outwards. The hanging parts 17 are arranged on the front and rear side walls of the weighing body 4 and are placed above the first cross beam 2 and the second cross beam 3. By connecting the weighing sensor 5 to the hoisting part 16 and the hanging part 17 respectively, while realizing the hanging of the weighing body 4, it does not affect the up and down movement of the weighing body 4.

[0046] Furthermore, there is an overlapping part between the projection of the hanging part 17 and the first cross beam 2 or the second cross beam 3 in the third direction, and the third direction is perpendicular to the first direction and perpendicular to the second direction.

[0047] Specifically, the hanging part 17 protrudes outwards along the direction perpendicular to the outer wall of the weighing body 4 and extends above the first cross beam 2 or the second cross beam 3. When the weighing body 4 loses the hanging effect of the weighing sensor 5, the hanging part 17 can be lapped on the first cross beam 2 and the second cross beam 3, so that the weighing body 4 is still suspended between the first cross beam 2 and the second cross beam 3. Such a setting can avoid the weighing body 4 falling to the ground when the position of the weighing sensor 5 breaks, resulting in the scattering of materials.

[0048] Furthermore, the support frame 1 further includes a plurality of support feet 18. The plurality of support feet 18 are respectively installed at the ends of the first cross beam 2 and the second cross beam 3. The support feet 18 extend along the third direction.

[0049] Specifically, in this embodiment, there are four support feet 18, which are respectively connected to both ends of the first cross beam 2 and the second cross beam 3. The support feet 18 are used to support the entire weighing scale. During installation, the four support feet 18 need to be ensured to be in the vertical direction, so as to ensure that when the weighing body 4 hangs freely, it contacts the limiting rods 15, the first cross beam 2 and the second cross beam 3.

[0050] Furthermore, the corresponding ends of the first cross beam 2 and the second cross beam 3 are connected by a strengthening beam 19.

[0051] Specifically, the strengthening beam 19 extends along the first direction, and the purpose of setting the strengthening beam 19 is to increase the structural strength of the support frame 1.

[0052] Furthermore, it further includes a controller, and the controller includes:

[0053] A processing module, the processing module is electrically connected to the pressure sensor 9, and the processing module is configured to calculate the load applied to the weighing body 4 according to the first force arm, the second force arm and the value of the pressure sensor 9; the first force arm is the distance between the first hinge point 12 and the second hinge point 13, and the second force arm is the distance between the third hinge point 14 and the second hinge point 13;

[0054] A touch screen, the touch screen is configured to input the first force arm and the second force arm, and is also configured to display the load.

[0055] Specifically, the controller is provided with a housing, the processing module is arranged inside the housing, the touch screen is installed outside the housing, and the touch screen is electrically connected to the processing module. When calibrating the weighing scale, first input the first force arm and the second force arm through the touch screen, where the first force arm is the power arm and the second force arm is the resistance arm, and then apply pressure through the pressing member 7. During the pressure application process, the processing module real-time obtains the pressure measured by the pressure sensor 9, and calculates the load applied to the weighing body 4 based on the lever theorem according to the first force arm and the second force arm, and then displays the calculated load on the touch screen. The operator can judge whether the load meets the set requirements according to the content displayed on the touch screen. When the load meets the set requirements, close the pressing member 7.

[0056] Furthermore, the processing module is also electrically connected to each weighing sensor 5. By obtaining the values detected by each weighing sensor 5, the sum is calculated to obtain the weight of the material, and the obtained weight is displayed on the touch screen.

[0057] Working process: Taking the loading rod 11 as a lever, the first hinge point 12 as a force application point, the second hinge point 13 as a fulcrum, and the third hinge point 14 as a force receiving point, the pressing member 7 is opened. The pressing portion 8 on the pressing member 7 presses the connecting rod 10, and then the connecting rod 10 transmits the pressure to the position of the first hinge point 12 on the loading rod 11. The processing module real-time obtains the pressure F1 applied by the applying member 7, calculates the pressure F1 / 2 at the position of the first hinge point 12, and then calculates the load at the position of the third hinge point 14 and the load is F1×L1 / L2×2 according to the length L1 of the power arm and the length L2 of the resistance arm and based on the lever theorem. Since there are two loading rods 11, the load applied to the weighing body 4 is calculated as F2 = F1×L1 / L2 and is displayed on the touch screen. When the load applied to the weighing body 4 meets the requirements, the pressing member 7 is closed. At the same time, the processing module real-time obtains the weights detected by the three weighing sensors 5, and obtains the total weight G of the weighing body 4 by summing. Since the total weight G0 of the weighing body 4 before weighing is known, when G = G0 + F2, it indicates that the weighing scale weighs accurately, and thus the calibration of the weighing scale is completed.

[0058] The above description is only the preferred embodiments of the present application and the description of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the technical solutions formed by mutually replacing the above features with the (but not limited to) technical features with similar functions disclosed in the present application.

Claims

1. A weighing scale with loading and calibration function, characterized in that: include: A support frame (1), the support frame (1) comprising a first crossbeam (2) and a second crossbeam (3) arranged in a first direction; A weighing body (4), the weighing body (4) is connected to the first crossbeam (2) and the second crossbeam (3) via a plurality of weighing sensors (5), and is suspended between the first crossbeam (2) and the second crossbeam (3); A loading mechanism, the loading mechanism comprising a loading assembly (6) and a pressure member (7), the pressure member (7) being mounted on the first crossbeam (2), the pressure member (7) comprising a retractable pressure portion (8), the loading assembly (6) being connected to the pressure portion (8) and the side wall of the scale body (4), the pressure portion (8) pressing down the loading assembly (6) to load the scale body (4); A pressure sensor (9), wherein the pressure sensor (9) is arranged at a connection position between the pressure applying portion (8) and the loading component (6).

2. The weighing scale with loading and calibration function according to claim 1, characterized in that: The loading component (6) comprises: A connecting rod (10), the connecting rod (10) being arranged on a side of the scale body (4) close to the pressure member (7) and being placed on a side of the pressure member (7) away from the first crossbeam (2); the pressure member (8) presses down the connecting rod (10) to load the scale body (4); A pair of loading rods (11), the pair of loading rods (11) are arranged along a second direction and are respectively arranged on two opposite sides of the scale body (4), the second direction is perpendicular to the first direction; one end of the loading rod (11) is hinged to the end of the connecting rod (10) to form a first hinge point (12), and the other end is hinged to the second crossbeam (3) to form a second hinge point (13), and the two ends of the loading rod (11) are hinged to the side wall of the scale body (4) to form a third hinge point (14), and the loading rod (11) forms a lever structure with the second hinge point (13) as a fulcrum.

3. The weighing scale with loading and calibration function according to claim 2, characterized in that: The pressure-applying portion (8) corresponds to a middle position of the connecting rod (10).

4. The weighing scale with loading and calibration function according to claim 3, characterized in that: The support frame (1) further comprises a pair of limit rods (15), the pair of limit rods (15) are arranged in an array along the second direction and are respectively arranged on two opposite sides of the scale body (4), and the two ends of the limit rods (15) are respectively connected to the first crossbeam (2) and the second crossbeam (3).

5. The weighing scale with loading and calibration function according to claim 4, characterized in that: The first crossbeam (2) and the second crossbeam (3) are provided with a hanging part (16), the scale body (4) is provided with a hanging part (17) corresponding to the hanging part (16), one end of the weighing sensor (5) is connected to the hanging part (16), and the other end is connected to the hanging part (17).

6. The weighing scale with loading and calibration function according to claim 5, characterized in that: There is an overlapping portion between the hanging portion (17) and the projection of the first crossbeam (2) or the second crossbeam (3) in a third direction, and the third direction is perpendicular to the first direction and perpendicular to the second direction.

7. The weighing scale with loading and calibration function according to claim 6, characterized in that: The support frame (1) further comprises a plurality of supporting feet (18), wherein the plurality of supporting feet (18) are respectively mounted on the ends of the first crossbeam (2) and the second crossbeam (3), and the supporting feet (18) extend along the third direction.

8. The weighing scale with loading and calibration function according to claim 7, characterized in that: The corresponding ends of the first crossbeam (2) and the second crossbeam (3) are connected via a reinforcing beam (19).

9. The weighing scale with loading and calibration function according to claim 8, characterized in that: Also included is a controller, the controller comprising: a processing module, the processing module being electrically connected to the pressure sensor (9), the processing module being configured to calculate the load applied to the scale (4) according to the first force arm, the second force arm and the numerical value of the pressure sensor (9); the first force arm being the distance between the first hinge point (12) and the second hinge point (13), and the second force arm being the distance between the third hinge point (14) and the second hinge point (13); A touch screen is configured to input the first force arm and the second force arm, and is also configured to display the load.

Images