A dynamic weighing calibration device

Abstract

The utility model relates to the technical field of weighing apparatus calibration, and proposes a kind of dynamic weighing calibration device, act on belt scale, including chain code, the belt scale has the anti-deviation mechanism of correcting chain code position, the anti-deviation mechanism includes two push plates symmetrically located at the both sides of belt scale, the push plate is set along the length direction of chain code and with the length of chain code match, two push plates are driven by a power source to be synchronous to approach or away from the both sides of chain code. The utility model has the beneficial effect that: utilize power source to control a pair of push plate to approach the both sides of chain code, until push plate gently abuts the both side edges of chain code, force chain code to be centered along the center line of belt, avoid chain code deviation, influence calibration accuracy.

Description

Technical Field

[0001] This utility model relates to the technical field of weighing instrument calibration, specifically to a dynamic weighing calibration device. Background Technology

[0002] Weighing instruments are used to determine the mass of objects based on Hooke's Law or the lever principle of force balance. They are widely used in industry, agriculture, commerce, scientific research, and healthcare. Belt scales are one type of weighing instrument, and existing belt scales require calibration before use.

[0003] Currently, chain codes are commonly used to simulate dynamic material loads and calibrate the measurement accuracy of belt scales. After the chain codes are placed on the belt scale, their positions need to be adjusted to ensure that their center lines coincide with the belt center lines in order to avoid uneven weight distribution due to misalignment. However, operators cannot accurately align the chain codes by visually judging whether they are centered, which often results in slight deviations between the chain code center lines and the belt center lines. This causes the measurement results to deviate from the actual values, reducing the calibration accuracy. Utility Model Content

[0004] This invention proposes a dynamic weighing calibration device that uses a power source to control a pair of push plates to move closer to both sides of the chain code until the push plates gently touch the two sides of the chain code, forcing the chain code to align with the center line of the belt, thus avoiding chain code offset and affecting calibration accuracy.

[0005] Therefore, the technical solution adopted is as follows:

[0006] A dynamic weighing calibration device, applied to a belt scale, includes a chain code. The belt scale has an anti-deviation mechanism for correcting the position of the chain code. The anti-deviation mechanism includes two push plates symmetrically located on both sides of the belt scale. The push plates are arranged along the length direction of the chain code and matched with the length of the chain code. The two push plates are driven by a power source to synchronously move closer to or away from both sides of the chain code.

[0007] A further technical solution is that the power source is fixed to two push plates by two support arms respectively. The power source includes a drive motor. The output end of the drive motor is keyed to a gear. The gear has two corresponding racks that drive in opposite directions and are meshed on it. Each rack is fixed to a support arm.

[0008] A further technical solution is that a first pull rope and a second pull rope are fixed to both ends of the chain code, and a first mounting frame and a second gantry frame are mounted on the belt scale. An electric hoist is fixed to the top of the first mounting frame, the other end of the first pull rope is connected to the output end of the electric hoist, and the other end of the second pull rope is fixed to the top of the second gantry frame.

[0009] A further technical solution includes two fixed plates symmetrically located on both sides of the belt scale. The fixed plates are fixed to the frame of the belt scale, and two support arms pass through the two fixed plates and are slidably connected to them.

[0010] A further technical solution is that a sliding groove is provided on the rack along its length direction, a through hole is provided on the fixing plate, a slider matching the sliding groove is fixed on the inner wall of the through hole, and the rack passes through the through hole and is slidably connected to the fixing plate through the slider and the sliding groove.

[0011] The working principle and beneficial effects of this application are as follows:

[0012] The power source controls a pair of support arms to move closer to each other. The support arms drive the push plate to move closer to both sides of the chain code until the push plate gently touches the two sides of the chain code, forcing the chain code to be centered with the center line of the belt. This avoids chain code offset and affects calibration accuracy, eliminating the need for recalibration and repeated adjustments, reducing manpower and operational errors, and ensuring that the chain code position is always centered in multiple measurements, thus reducing measurement errors. Attached Figure Description

[0013] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0014] Figure 1 This is a schematic diagram of the overall structure of this application;

[0015] Figure 2 This is a schematic diagram of the chaincode structure described in this application;

[0016] Figure 3 This is a schematic diagram of the anti-deviation mechanism described in this application;

[0017] Figure 4 This is a schematic diagram of the structure of the fixing plate described in this application.

[0018] In the diagram: 1. Belt scale; 3. First mounting bracket; 4. Electric hoist; 5. First pull rope; 6. Chain code; 7. Second pull rope; 8. Second gantry frame; 9. Anti-deviation mechanism; 91. Support arm; 92. Push plate; 93. Fixing plate; 94. Rack; 95. Drive motor; 96. Gear; 97. Slide groove. Detailed Implementation

[0019] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0020] like Figures 1-4 As shown, a dynamic weighing calibration device operates on a belt scale 1, including a chain code 6. The belt scale 1 has an anti-deviation mechanism 9 for correcting the position of the chain code 6. The anti-deviation mechanism 9 includes two push plates 92 symmetrically located on both sides of the belt scale 1. The push plates 92 are arranged along the length direction of the chain code 6 and match the length of the chain code 6. The two push plates 92 are driven by a power source to synchronously move closer to or away from the sides of the chain code 6. A gap exists between the push plates 92 and the top of the belt scale 1 to avoid friction with the belt.

[0021] The chain code 6 is placed above the belt scale 1. The belt of the belt scale 1 is started, and the belt drives the chain code 6 to run continuously at the rated speed to simulate the real material conveying state. The cumulative weight of the chain code 6 is calculated in real time through its own weighing sensor and speed sensor, and compared with the theoretical weight of the chain code to complete the calibration error calculation.

[0022] The power source is fixed to two push plates 92 via two support arms 91. When the belt scale 1 is in the calibration state, the power source can control a pair of support arms 91 to move closer to each other. The support arms 91 drive the push plates 92 to move closer to both sides of the chain code 6 until the push plates 92 gently touch the two sides of the chain code 6, forcing the chain code 6 to be centered along the belt center line, so as to avoid the chain code 6 from shifting and affecting the calibration accuracy. Then the power source controls the pair of support arms 91 to reset, and then the calibration work is carried out.

[0023] like Figure 3 As shown, one embodiment of the power source includes a drive motor 95, the output end of which is keyed to a gear 96. The gear 96 has two corresponding racks 94 that drive in opposite directions, and each rack 94 is fixed to a support arm 91.

[0024] The output of the drive motor 95 drives the gear 96 to rotate clockwise, and a pair of racks 94 slide in opposite directions. The support arm 91 drives the push plate 92 to move closer to both sides of the chain code 6 until the push plate 92 gently touches the two sides of the chain code 6, forcing the chain code 6 to be centered along the belt centerline. Conversely, the drive motor 95 reverses, the gear 96 drives the pair of racks 94 to reset, the support arm 91 drives the push plate 92 away from the chain code 6, and the anti-deviation mechanism 9 resets to its initial position.

[0025] It should be noted that a pressure sensor can be installed on the side wall of the push plate 92. When the pressure sensor on the side wall of the push plate 92 comes into contact with the edge of the chain code 6, the sensor detects the contact pressure in real time. The initial pressure is 0, and the pressure gradually increases after contact. When the pressure sensor detects that the pressure reaches the preset threshold, the sensor sends a reset signal to the drive motor 95, the drive motor 95 reverses, and the push plate 92 resets.

[0026] like Figure 1As shown, a first pull rope 5 and a second pull rope 7 are fixed to both ends of the chain weight 6. A first mounting frame 3 and a second gantry frame 8 are mounted on the belt scale 1, arranged opposite each other. An electric hoist 4 is fixed to the top of the first mounting frame 3. The other end of the first pull rope 5 is connected to the output end of the electric hoist 4, and the other end of the second pull rope 7 is fixed to the top of the second gantry frame 8. The electric hoist 4 controls the raising and lowering of the chain weight 6 by raising and lowering the first pull rope 5, realizing the contact and separation of the chain weight 6 from the belt. The first pull rope 5 slowly lowers the chain weight 6 until the chain weight 6 smoothly contacts the belt surface of the belt scale 1. The chain weight 6 is completely supported by the belt, and at this time the chain weight 6 is in a state of waiting for calibration.

[0027] like Figures 3-4 As shown, the anti-deviation mechanism 9 also includes two fixed plates 93 symmetrically located on both sides of the belt scale 1. The fixed plates 93 are fixed to the frame of the belt scale 1, and two support arms 91 pass through the two fixed plates 93 respectively and are slidably connected to them. The fixed plates 93 guide and limit the support arms 91, ensuring that they slide in a straight line without angular deviation.

[0028] A groove 97 is formed along the length of the rack 94, and a through hole is formed on the fixing plate 93. A slider matching the groove 97 is fixed on the inner wall of the through hole. The rack 94 passes through the through hole and is slidably connected to the fixing plate 93 through the slider and the groove 97. The groove on the rack 94, in cooperation with the slider in the through hole of the fixing plate 93, further restricts the sliding direction of the rack 94 and prevents the rack 94 from deviating or getting stuck.

[0029] In the initial state, the chain weight 6 is suspended above the belt scale 1, and the pair of support arms 91 of the anti-deviation mechanism 9 are in the initial position. By starting the electric hoist 4, the first pull rope 5 slowly lowers the chain weight 6 until it smoothly contacts the belt surface of the belt scale 1. The chain weight 6 is completely supported by the belt and is in the state of waiting for calibration. The power source controls the pair of support arms 91 to move closer to each other. The support arms 91 drive the push plate 92 to move closer to both sides of the chain weight 6 until the push plate 92 gently touches the two side edges of the chain weight 6, forcing the chain weight 6 to be centered along the center line of the belt, avoiding the chain weight 6 from deviating and affecting the calibration accuracy. Then, the power source controls the pair of support arms 91 to reset, and then the belt of the belt scale 1 is started. The belt drives the chain weight 6 to run continuously at the rated speed to simulate the real material conveying state. Through its own weighing sensor and speed sensor, the cumulative weight of the chain weight 6 is calculated in real time and compared with the theoretical weight of the chain weight to complete the calibration error calculation.

[0030] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A dynamic weighing calibration device, operating on a belt scale (1), comprising a chain code (6), characterized in that, The belt scale (1) has an anti-deviation mechanism (9) for correcting the position of the chain code (6). The anti-deviation mechanism (9) includes two push plates (92) symmetrically located on both sides of the belt scale (1). The push plates (92) are arranged along the length direction of the chain code (6) and match the length of the chain code (6). The two push plates (92) are driven by a power source to synchronously move closer to or away from both sides of the chain code (6).

2. The dynamic weighing calibration device according to claim 1, characterized in that, The power source is fixed to two push plates (92) by two support arms (91) respectively. The power source includes a drive motor (95). The output end of the drive motor (95) is keyed to a gear (96). The gear (96) has two racks (94) that mesh with each other and drive in opposite directions. Each rack (94) is fixed to a support arm (91) respectively.

3. The dynamic weighing calibration device according to claim 1, characterized in that, The two ends of the chain code (6) are respectively fixed with a first pull rope (5) and a second pull rope (7). A first mounting frame (3) and a second gantry frame (8) are set up on the belt scale (1) and are arranged opposite to each other. An electric hoist (4) is fixed on the top of the first mounting frame (3). The other end of the first pull rope (5) is connected to the output end of the electric hoist (4), and the other end of the second pull rope (7) is fixed to the top of the second gantry frame (8).

4. The dynamic weighing calibration device according to claim 2, characterized in that, It also includes two fixed plates (93) symmetrically located on both sides of the belt scale (1). The fixed plates (93) are fixed to the frame of the belt scale (1), and two support arms (91) pass through the two fixed plates (93) respectively and are slidably connected to them.

5. A dynamic weighing calibration device according to claim 4, characterized in that, The rack (94) has a groove (97) along its length direction, and the fixing plate (93) has a through hole. A slider matching the groove (97) is fixed on the inner wall of the through hole. The rack (94) passes through the through hole and is slidably connected to the fixing plate (93) through the slider, the groove (97) and the fixing plate (93).

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