Belt weigher calibration device

Abstract

The utility model relates to the technical field of weighing equipment, and discloses a belt weigher calibration device which comprises a weighing frame and a conveying frame portion, the conveying frame portion comprises a conveying belt and a supporting frame, the weighing frame comprises a carrier roller capable of bearing the conveying belt, the length of the carrier roller is larger than the width of the conveying belt, and the two ends of the carrier roller extend out of the conveying belt. Weighing seats are installed below the two ends, extending out of the conveying belt, of the carrier roller, the weighing seats are fixedly connected with the supporting frame, weighing sensors connected with the carrier roller are installed on the weighing seats, the two weighing sensors are sleeved with sealing shells, and verification parts are arranged at the two ends of the carrier roller. Therefore, the belt weigher calibration device which is convenient to overhaul and not easy to damage is needed.

Description

Technical Field

[0001] The utility model relates to the technical field of weighing equipment, in particular to a belt scale calibration device. Background Art

[0002] A belt scale is a metering device that continuously weighs materials during the process of conveying solid bulk materials on a belt conveyor. The basic working principle is to sense the mass signal of the passing material through a weighing sensor, and combine it with the belt line speed signal sensed by a speed sensor. The two signals are calculated by an integrator to finally obtain the mass of the material flowing through the belt scale. It can measure the instantaneous flow rate and cumulative flow rate of the material passing through the belt conveyor without interrupting the material flow, and is used for metering and automatic batching of various solid materials. Existing belt scale equipment is often set directly below the conveyor belt. During the process of conveying materials such as coal, there is often a lot of coal slime, lubricating oil, etc. accumulated below. This will cause damage to the weighing sensor in the long run. It is also not easy to repair because it is set below the conveyor belt. Therefore, a belt scale calibration device that is easy to repair and not easy to damage is required. Utility Model Content

[0003] The utility model aims to provide a belt scale calibration device, so as to provide a belt scale calibration device which is easy to inspect and repair and not easy to be damaged.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a belt scale calibration device, including a weighing frame and a conveying frame part, the conveying frame part includes a conveyor belt and a support frame, the weighing frame includes rollers that can support the conveyor belt, the length of the rollers is greater than the width of the conveyor belt and both ends of the rollers extend out of the conveyor belt, weighing seats are installed under both ends of the rollers extending out of the conveyor belt, the weighing seats are fixedly connected to the support frame, weighing sensors connected to the rollers are installed on the weighing seats, the two weighing sensors are both covered with sealed shells, and calibration parts are provided at both ends of the rollers.

[0005] The principle and beneficial effects of this solution are as follows: The principle of this technical solution is that by providing rollers that can support the conveyor belt, when the material is transmitted on the conveyor belt, the force exerted by the material on the roller will be transmitted to the weighing sensor on the weighing frame. The weighing sensor is a force conversion device that converts the force acting on the roller into an electrical signal for output.

[0006] By providing a sealed shell outside the weighing sensor, the weighing sensor can be effectively isolated from the external environment, and the weighing sensor can be effectively prevented from being corroded in a humid environment containing sulfur dioxide when conveying special materials. The weighing sensor can be prevented from being damaged by corrosion, resulting in serious weighing accidents, thereby extending the service life of the sensor and maintaining its accuracy and stability. At the same time, impurities such as coal slime can be prevented from entering the connection between the weighing sensor and the roller to affect the weighing accuracy. The above settings ensure the stable operation of the device in harsh environments and reduce the possibility of failures.

[0007] Weighing seats are installed under both ends of the conveyor belt where the rollers extend out. The weighing seats are fixedly connected to the support frames. Weighing sensors connected to the rollers are installed on the weighing seats. Through the above arrangement, the weighing frames extend out of the bottom of the conveyor belt, making the inspection and maintenance of the device more convenient and quick.

[0008] Preferably, as an improvement, roller extension rods are provided at both ends of the roller, the calibration part includes a connecting rod, a nut, a weight and a hook, a hanging hole is opened at the end of the connecting rod, one end of the hook passes through the hanging hole and is threadedly connected to the nut and fixed on the connecting rod, the weight is hung on the hook, and the connecting rod is threadedly connected to the roller extension rod.

[0009] The beneficial effects are: by hanging weights of standard mass and setting the time when starting the conveyor belt, the weighing accuracy of the weighing device can be calibrated through calculation to ensure the accuracy and precision of its measurement. When using, only suitable weights need to be hung. Compared with other calibration methods, the steps are simpler and at the same time, it can ensure that the measurement results of the weighing device are accurate and reliable, thereby improving the credibility of the work. In this technical solution, the weighing frame is extended out from the bottom of the conveyor belt to facilitate the operation of replacing weights and improve calibration efficiency.

[0010] Preferably, as an improvement, it further comprises a ventilation part, the ventilation part comprises a fan and a connecting pipe, and one end of the connecting pipe is connected to the inside of the sealed shell.

[0011] The beneficial effects are: starting the fan to generate airflow, and introducing the clean airflow generated by the fan into the sealed housing through the connecting pipe, thereby preventing acidic gas from penetrating into the sealed housing and causing damage to the weighing sensor, thereby further protecting the weighing sensor.

[0012] Preferably, as an improvement, the weighing seat includes a base frame and limit bolts, the weighing sensor is fixed on the base frame, the bottom of the base frame is fixed to the support frame by a plurality of limit bolts, the weighing sensor is located above the limit bolts, and the height of the limit bolts can be adjusted by rotating the limit bolts.

[0013] The beneficial effects are as follows: in this technical solution, the base frame is fixed to the support frame by multiple limit bolts to ensure the stability of the overall installation of the weighing seat. The height of the bolt can be adjusted by turning the limit bolt. The weighing sensor is located on the upper part of the limit bolt. When the weight on the conveyor belt exceeds the load of the weighing sensor, it may cause damage to the connection between the weighing sensor and the base frame. The weighing sensor will shift downward. At this time, the limit bolt can support the weighing sensor to prevent it from being damaged.

[0014] Preferably, as an improvement, a flexible sealing ring is fixedly sleeved on the surface of the support roller in contact with the sealing shell.

[0015] The beneficial effect is that it can play a sealing role and prevent external acidic gas from entering the sealed shell.

[0016] Preferably, as an improvement, a speed sensor for detecting the speed of the conveyor belt is also bolted fixedly connected to the support frame.

[0017] The beneficial effect is that the speed sensor can be used to detect the running distance of the conveyor belt per unit time, and then the weight signal from the weighing sensor and the speed signal from the speed sensor can be received through the accumulator, and after multiplication and amplification, the instantaneous flow value and the cumulative flow value can be obtained by integration or accumulation method. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0019] Figure 2 A detailed view of the sealing housing of an embodiment of the utility model;

[0020] Figure 3 It is a schematic diagram of the structure of the verification unit of an embodiment of the utility model. DETAILED DESCRIPTION

[0021] The following is further described in detail through specific implementation methods:

[0022] The figure marks in the drawings of the specification include: conveyor belt 1, support frame 2, roller 3, weighing sensor 4, sealing shell 5, roller extension rod 6, connecting rod 7, nut 8, weight 9, hook 10, fan 11, connecting pipe 12, base frame 13, limit bolt 14, flexible sealing ring 15.

[0023] Example

[0024] The embodiment is basically as follows Figure 1-Figure 3 As shown, Figure 1 and Figure 2A belt scale calibration device shown in the figure includes a weighing frame and a conveying frame part, the conveying frame part includes a conveyor belt 1 and a support frame 2, the weighing frame includes a roller 3 that can support the conveyor belt 1, the length of the roller 3 is greater than the width of the conveyor belt 1 and both ends extend out of the conveyor belt 1, weighing seats are installed below both ends of the roller 3 extending out of the conveyor belt 1, the weighing seats are fixedly connected to the support frame 2, weighing sensors 4 connected to the roller 3 are installed on the weighing seats, and the two weighing sensors 4 are both covered with a sealing shell 5, the sealing shell 5 is fixed to the end of the roller 3 by fasteners, and the surface of the roller 3 in contact with the sealing shell 5 is fixedly covered with a flexible sealing ring 15, which can isolate the sealing shell 5 from the outside and prevent external acidic gas from entering the sealing shell 5 and damaging the weighing sensor 4. In this embodiment, weighing sensors 4 are provided on both sides of the roller 3. Compared with the traditional method of providing one weighing sensor 4 under the conveyor belt 1, on the one hand, two weighing sensors 4 can increase the upper limit of the weighing load, and then the roller 3 can carry more weight through two weighing seats, which is suitable for more usage scenarios to improve the detection accuracy; on the other hand, the length of the roller 3 is greater than the width of the conveyor belt 1 and both ends extend out of the conveyor belt 1, which can prevent impurities such as coal slime from entering the connection between the weighing sensor 4 and the roller 3 and affecting the weighing accuracy, ensuring the stable operation of the device in harsh environments and reducing the possibility of failure. Weighing seats are installed below both ends of the roller 3 extending out of the conveyor belt 1, and the weighing seats are fixedly connected to the support frame 2. The weighing sensors 4 connected to the roller 3 are installed on the weighing seats. Through the above arrangement, the weighing frame extends out from the bottom of the conveyor belt 1, making the inspection and maintenance of the device more convenient and quick. A speed sensor for detecting the speed of the conveyor belt 1 is also bolted to the support frame 2. The speed sensor can be used to detect the running stroke of the conveyor belt 1 per unit time. The weight signal from the weighing sensor 4 and the speed signal from the speed sensor can be received by the accumulator, and the instantaneous flow value and the cumulative flow value can be obtained by multiplying and amplifying them according to the integration method or the accumulation method.

[0025] The present embodiment also includes a ventilation part, which includes a fan 11 and a connecting pipe 12. One end of the connecting pipe 12 is connected to the inside of the sealed shell 5. The end of the connecting pipe 12 entering the sealed shell 5 is covered with an air outlet nozzle, and the air outlet nozzle is directly connected to the weighing sensor 4 to assist in protecting the sensor from dust accumulation. In addition, the fan 11 is started to generate an airflow, and the clean airflow generated by the fan 11 is introduced into the sealed shell 5 through the connecting pipe 12 to prevent acidic gas from penetrating into the sealed shell 5 and damaging the weighing sensor 4, thereby further protecting the weighing sensor 4.

[0026] like Figure 3As shown, in this embodiment, roller extension rods 6 are provided at both ends of the roller 3, and calibration parts are provided at both ends of the roller 3. The calibration parts include connecting rod 7, nut 8, weight 9 and hook 10. A hanging hole is opened at the end of the connecting rod 7, and one end of the hook 10 passes through the hanging hole and is threadedly connected to the nut 8 and fixed on the connecting rod 7. The weight 9 is hung on the hook 10, and the connecting rod 7 is threadedly connected to the roller extension rod 6. When in use, the weight 9 of standard mass is hung, and a period of time is set after the conveyor belt 1 is started. The weighing accuracy of the weighing device can be calibrated by calculation to ensure the accuracy and precision of its measurement. When in use, only suitable weights 9 need to be hung. Compared with the traditional calibration method, the steps of placing objects on the conveyor belt 1 and adjusting parameters are simpler. At the same time, it can ensure that the measurement results of the weighing device are accurate and reliable, and the credibility of the weighing results is improved. In this technical solution, the weighing frame is extended from the bottom of the conveyor belt 1 to facilitate the operation of replacing the weight 9, improve the calibration efficiency, and facilitate the staff to replace weights 9 of different weights for testing. Figure 2 As shown, the weighing seat includes a base frame 13 and a limit bolt 14, the weighing sensor 4 is fixed on the base frame 13, and the bottom of the base frame 13 is fixed to the support frame 2 by a plurality of limit bolts 14, the weighing sensor 4 is located above the limit bolt 14, and the height of the limit bolt 14 can be adjusted by rotating the limit bolt 14. In the present technical solution, the base frame 13 is fixed to the support frame 2 by a plurality of limit bolts 14 to ensure the stability of the overall installation of the weighing seat, and the height of the bolt can be adjusted by rotating the limit bolt 14, and the weighing sensor 4 is located at the upper part of the limit bolt 14. When the weight on the conveyor belt 1 exceeds the load of the weighing sensor 4, the connection between the weighing sensor 4 and the base frame 13 may be damaged, and the weighing sensor 4 will deviate downward, and at this time, the limit bolt 14 can support the weighing sensor 4 to prevent it from being damaged.

[0027] A method of using a belt scale calibration device is as follows:

[0028] The principle of the technical solution is that by providing a roller 3 capable of supporting the conveyor belt 1, when the material is conveyed on the conveyor belt 1, the force exerted by the material on the roller 3 will be transmitted to the weighing sensor 4 on the weighing frame. The weighing sensor 4 is a force conversion device, which converts the force acting on the roller 3 into an electrical signal for output. In the present embodiment, two weighing sensors 4 are provided. When calculating the weight, the weighing values ​​on both sides are accumulated, and the running stroke of the conveyor belt 1 per unit time is detected by the speed sensor. Then, the weight signal from the weighing sensor 4 and the speed signal from the speed sensor can be received by the accumulator, and after multiplication and amplification, the instantaneous flow value and the cumulative flow value are obtained by the integration method or the accumulation method, so as to obtain the accurate measurement result of the items conveyed on the conveyor belt 1.

[0029] In this embodiment, by setting a sealed housing 5 outside the weighing sensor 4, the weighing sensor 4 can be effectively isolated from the external environment, and the weighing sensor 4 can be effectively prevented from being corroded in a humid environment containing sulfur dioxide when conveying special materials, and the weighing sensor 4 can be prevented from being damaged by corrosion, resulting in serious weighing accidents, thereby extending the service life of the sensor and maintaining its accuracy and stability. At the same time, it can also prevent impurities such as coal slime from entering the connection between the weighing sensor 4 and the roller 3 to affect the weighing accuracy. The above arrangement ensures the stable operation of the device in harsh environments and reduces the possibility of failure. Weighing seats are installed below both ends of the roller 3 extending out of the conveyor belt 1. The weighing seats are fixedly connected to the support frame 2. The weighing sensors 4 connected to the roller 3 are installed on the weighing seats. Through the above arrangement, the weighing frame extends out from the bottom of the conveyor belt 1, making the inspection and maintenance of the device more convenient and quick.

[0030] The above is only an embodiment of the utility model, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A belt scale calibration device, characterized in that: It includes a weighing frame and a conveying frame part. The conveying frame part includes a conveyor belt and a supporting frame. The weighing frame includes rollers that can support the conveyor belt. The length of the rollers is greater than the width of the conveyor belt and both ends extend out of the conveyor belt. Weighing seats are installed under both ends of the rollers extending out of the conveyor belt. The weighing seats are fixedly connected to the supporting frame. Weighing sensors connected to the rollers are installed on the weighing seats. The two weighing sensors are both covered with sealed shells. Calibration parts are provided at both ends of the rollers.

2. A belt scale calibration device according to claim 1, characterized in that: Roller extension rods are provided at both ends of the roller. The calibration part includes a connecting rod, a nut, a weight and a hook. A hanging hole is opened at the end of the connecting rod. One end of the hook passes through the hanging hole and is threadedly connected to the nut and fixed on the connecting rod. The weight is hung on the hook, and the connecting rod is threadedly connected to the roller extension rod.

3. A belt scale calibration device according to claim 2, characterized in that: It also includes a ventilation part, which includes a fan and a connecting pipe, and one end of the connecting pipe is connected to the inside of the sealed shell.

4. A belt scale calibration device according to claim 3, characterized in that: The weighing seat includes a base frame and limit bolts. The weighing sensor is fixed on the base frame. The bottom of the base frame is fixed to the support frame through a plurality of limit bolts. The weighing sensor is located above the limit bolts, and the height of the limit bolts can be adjusted by rotating the limit bolts.

5. A belt scale calibration device according to claim 4, characterized in that: A flexible sealing ring is fixedly sleeved on the surface where the supporting roller contacts the sealing shell.

6. A belt scale calibration device according to claim 5, characterized in that: A speed sensor for detecting the speed of the conveyor belt is also bolted and connected to the support frame.

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