CN212060308U

CN212060308U - Air chute putty detecting system based on electrostatic method

Info

Publication number: CN212060308U
Application number: CN202020896614.3U
Authority: CN
Inventors: 黄彦春; 张胜泉; ***; 邹延阳; 邵彦锟; 胡华君
Original assignee: Sinoma Tianjin Control Engineering Co ltd; Tianjin Sino German University of Applied Sciences
Current assignee: Sinoma Tianjin Control Engineering Co ltd; Tianjin Sino German University of Applied Sciences
Priority date: 2020-05-25
Filing date: 2020-05-25
Publication date: 2020-12-01
Anticipated expiration: 2030-05-25

Abstract

The utility model relates to the technical field of air chute material level detection, in particular to an air chute blockage detection system based on an electrostatic method, which comprises a chute body and an electrostatic charge measurement unit which is arranged in the length direction of the chute body and is used for measuring the electrostatic charge of materials in the chute body; the static charge measuring unit comprises a plurality of static sensors, a bolt, a nut and a washer, the bolt is fixed on a steel plate of the chute body and locked on the steel plate through the washer and the nut, the static sensors are fixedly arranged in an inner through hole of the bolt, and an insulator is arranged at the contact position of the static sensors and the bolt. This application is avoided blockking up and is shut down and cause great loss, also can assist quick location jam point to carry out emergency treatment.

Description

Air chute putty detecting system based on electrostatic method

Technical Field

The utility model relates to an air chute material level detects technical field, especially relates to an air chute putty detecting system based on electrostatic method.

Background

The air chute is suitable for conveying fluidized powdery materials such as cement and the like, and is not suitable for materials with large granularity, much water and poor fluidization performance. The air chute equipment has the advantages of simple structure, flexible arrangement and low power consumption. The working principle of the device is that a high-pressure centrifugal fan is used as a power source, so that solid particle materials flow downwards along a chute in a fluidized state. The air chute is different from other conveying machines, the conveying capacity is not too low, the material gasification uniformity can be improved by properly increasing the height of a material layer, the conveying efficiency is improved, and otherwise, the conveying process is not smooth. If the conveying amount is too high, clogging is likely to occur. Therefore, in the process of conveying materials, the observation door is frequently used to check the flowing condition of the materials and adjust the air intake by combining pressure measurement parameters. The water content of the material is controlled well, and when the water content is too high, the chute is easy to carry out poor fluidization, so that blockage occurs. In the actual production process, if the operation, maintenance and installation are not proper, the blockage is easy to occur. After the blockage occurs, the blockage point is very difficult to find due to the long length of the chute. Therefore, it is significant to design a detection system that can measure the amount of material in a chute in sections.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the not enough of above-mentioned technique, and provide an air chute putty detecting system based on electrostatic method.

The utility model discloses a realize above-mentioned purpose, adopt following technical scheme: the utility model provides an air chute putty detecting system based on electrostatic method which characterized in that: the chute comprises a chute body and an electrostatic charge measuring unit which is arranged in the length direction of the chute body and is used for measuring the electrostatic charge of materials in the chute body; the static charge measuring unit comprises a static sensor, a bolt, a nut and a washer, the bolt is fixed on a steel plate of the chute body and locked on the steel plate through the washer and the nut, the static sensor is fixedly arranged in an inner through hole of the bolt, and an insulator is arranged at the contact position of the static sensor and the bolt.

Preferably, a metal shielding cap is arranged outside the electrostatic sensor and is 2-3 mm lower than the steel plate.

Preferably, the distance between each measuring point is set to be 4-6 m, adjustment is carried out according to the arrangement route of the workshop chute, the arrangement of the measuring points is carried out in a dense arrangement near the positions of diameter changing, reversing, shunting or gathering, and the distance is set to be 0.5-2 m.

Preferably, the electrostatic sensors are uniformly distributed in the length direction of the four steel plates on the upper, lower, left and right sides of the chute body.

Preferably, the number of the electrostatic sensors is 1 on the cross section of the chute, the electrostatic sensors are arranged on an upper steel plate of the chute,

preferably, the number of the electrostatic sensors is 1-4, and the electrostatic sensors are respectively arranged in the steel plates on the upper, lower, left and right sides of the chute. Preferably, a metal shielding cap is arranged outside the electrostatic sensor and is 2-3 mm lower than the steel plate.

The beneficial effects of the utility model are that this application detects whether there is the material to be close to the frequency conversion of sensor and signal through arranging a plurality of electrostatic transducer on the chute and monitors the flow speed of material to carry out the early warning of jam condition, available low accuracy low-cost electrostatic transducer realizes the dynamic monitoring to the overlength chute in the workshop, avoids blockking up to shut down and causes great loss, also can assist quick location jam point, carries out emergency treatment.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view at B in FIG. 1;

fig. 3 is a cross-sectional view taken at a-a in fig. 1.

Detailed Description

Spatially relative terms such as "above … …", "above … …", "above … …", "above", and the like, may be used herein for ease of description to describe the spatial relationship of one feature or characteristic to another feature or characteristic as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

As shown in fig. 1 and 2, taking an air chute with a length of about 50 meters as an example, an air chute blockage detection system based on an electrostatic method comprises a chute body 1 and an electrostatic charge measurement unit 2 which is arranged in the length direction of the chute body and is used for measuring the electrostatic charge of materials in the chute body; the static charge measuring unit comprises a static sensor 21, a bolt 22, a nut 23 and a washer 24, the bolt is fixed on a steel plate of the chute body and locked on the steel plate through the washer and the nut, the static sensor is fixedly arranged in an inner through hole of the bolt, a signal is led out of the chute mainly through a core through hole of the drilled bolt, and an insulator is arranged at a contact position of the static sensor and the bolt. The principle is mainly based on that the material in the air chute is charged with static electricity, and the flow velocity of the material can be confirmed by detecting the frequency of a static signal in the chute. When the monitoring signal finds that the material flow rate is slowed down and is lower than a normal value, a worker can be prompted to overhaul, and the accidental shutdown is prevented. When the material is blocked, the first position of the blockage can be quickly found through the monitoring signal and processed.

The electrostatic sensor is fixed in the steel plate of chute through packing ring 2.4, nut 2.3, and the electrostatic sensor outside sets up the metal shield cap to reduce external interference, the metal shield cap is less than steel sheet 2 ~ 3 mm. Preventing it from being worn. The measuring points are arranged at positions easy to block as much as possible.

The electrostatic sensors can be arranged on the cross section of the chute in an amount of 1, can be arranged on an upper steel plate of the chute in an amount of 1-4, and are respectively arranged in four steel plates of the chute, namely the upper side, the lower side, the left side and the right side, as shown in fig. 3.

The system monitors the electrostatic sensor signals of each measuring point in real time through the PLC, monitors the flow rate of the chute material through the change of frequency, and sends out common early warning information to prompt an operator to carry out field processing after the flow rate is lower than a normal value and lasts for more than 1min, so as to prevent accidental shutdown; when the situation that the materials do not flow and the duration time exceeds 30s is detected, alarm information is sent out, and the materials must be overhauled.

The distance between each measuring point is set to be 4-6 m, adjustment is carried out according to the arrangement route of the workshop chute, and marking is carried out in the blockage alarm system, so that the marking position can be found quickly after alarm.

The arrangement of the measuring points is to select the positions of diameter changing, reversing, shunting or gathering to carry out dense arrangement, and the distance is set to be 0.5-2 m.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides an air chute putty detecting system based on electrostatic method which characterized in that: the chute comprises a chute body and an electrostatic charge measuring unit which is arranged in the length direction of the chute body and is used for measuring the electrostatic charge of materials in the chute body; the static charge measuring unit comprises a static sensor, a bolt, a nut and a washer, the bolt is fixed on a steel plate of the chute body and locked on the steel plate through the washer and the nut, the static sensor is fixedly arranged in an inner through hole of the bolt, and an insulator is arranged at the contact position of the static sensor and the bolt.

2. The electrostatic method based air chute blockage detection system as recited in claim 1, wherein: and a metal shielding cap is arranged outside the electrostatic sensor and is 2-3 mm lower than the steel plate.

3. The electrostatic method based air chute blockage detection system as recited in claim 1, wherein: the distance between the measuring points is set to be 4-6 m, adjustment is carried out according to the arrangement route of the workshop chute, the arrangement of the measuring points selects the positions of diameter changing, reversing, shunting or gathering to carry out dense arrangement, and the distance is set to be 0.5-2 m.

4. The electrostatic method based air chute blockage detection system as recited in claim 1, wherein: the electrostatic sensors are uniformly distributed in the length direction of the steel plates on the upper, lower, left and right sides of the chute body.

5. The electrostatic method based air chute blockage detection system as recited in claim 1, wherein: the number of the electrostatic sensors is 1 on the cross section of the chute, and the electrostatic sensors are arranged on an upper steel plate of the chute.

6. The electrostatic method based air chute blockage detection system as recited in claim 1, wherein: the number of the electrostatic sensors is 1-4, and the electrostatic sensors are respectively arranged in the steel plates on the upper, lower, left and right sides of the chute.