Method for preventing cantilever of bucket-wheel stacker-reclaimer from scraping and colliding with material pile

Abstract

The invention discloses a method for preventing a cantilever of a bucket-wheel stacker-reclaimer from scraping and colliding with a material stack. An operation room of the bucket-wheel stacker-reclaimer is generally designed to be installed at the upper end of a bucket wheel machine body, and the defects that in actual use, due to limitation of the space position, a sight blind area exists below the front end of a bucket wheel machine cantilever by bucket wheel machine operators in the operation process are overcome. The method comprises the following steps: selecting a proper distance measuring sensor; selecting a proper distance measuring sensor mounting position; the distance measuring sensor is in control butt joint with the bucket wheel machine lifting mechanism and the cantilever conveyor; setting the safe distance of the distance measuring sensor. The device is used for preventing the cantilever of the bucket-wheel stacker-reclaimer from being scraped and collided with a material stack.

Description

Technical Field

[0001] The invention relates to a method for preventing a bucket wheel stacker reclaimer cantilever from scraping against a material pile. Background Art

[0002] Bucket wheel stacker and reclaimer (hereinafter referred to as bucket wheel machine) is a large-scale stacking and reclaiming equipment commonly used in power, mining, docks, coal mines and other industries. Its cantilever length ranges from 20 to 60 meters. Due to the needs of operation, in order to ensure the wide field of vision of the operator and the stability of the operating room, the operating room of the bucket wheel stacker and reclaimer is generally designed to be installed at the upper end of the main body of the bucket wheel machine (i.e. the tail end of the bucket wheel machine cantilever). However, this design has shortcomings in actual use: due to spatial position limitations, the bucket wheel machine operator has a blind spot for the front end of the bucket wheel machine cantilever during operation.

[0003] During the operation of the bucket wheel, the operator needs to operate the rotation and lifting of the bucket wheel boom at any time according to the material pile situation. The operator needs to observe carefully in advance to predict whether the local protrusions of the piled materials in the material field will scrape the lower part of the bucket wheel boom. Because the shapes of the material piles are different, there are protrusions and pits, it is difficult for the operator to make an accurate judgment through observation, especially when working at night. And when operating the bucket wheel to reclaim materials, because it is necessary to always take into account the thickness of the reclaimed materials, the hardness of the pile, etc., it is easy for the operator to ignore the situation of the lower part of the front end of the bucket wheel boom, and the lower part of the bucket wheel boom will scrape against the piled materials, which may cause the cantilever conveyor belt to be scratched and deviated, or even torn and scrapped.

[0004] For the above problems, one method is for bucket wheel machine manufacturers to change the installation position of the operating room so that the bucket wheel machine driver has a relatively wider field of view when operating the bucket wheel machine, or is closer to the material for better observation. However, due to the limitations of the spatial position and the structure of the bucket wheel machine, this method is only relative to improve the field of view and observation angle of the bucket wheel machine driver. It can only slightly expand the field of view of the bucket wheel machine driver, and cannot fundamentally solve the problem of blind spots in the field of view. Another method is to install a monitoring camera on the bucket wheel machine. The bucket wheel machine driver can observe the relative position of the bucket wheel machine boom and the accumulated materials through the monitoring display, so as to make timely operational adjustments. However, although the monitoring camera makes up for the blind spot that the bucket wheel machine driver cannot observe the lower part of the bucket wheel machine boom, on the one hand, the bucket wheel machine shakes more when taking materials, and on the other hand, many materials such as earth, coal, sand and gravel contain small particles, which will produce a lot of dust when taking materials, which will affect the effect of the monitoring display. At the same time, the above method still cannot solve the problem that the bucket wheel operator must always take into account the thickness of the material taken by the bucket wheel, the hardness of the material pile, and observe and judge the distance between the cantilever and the material pile, which is easy to lose sight of the problem. Summary of the invention

[0005] The object of the present invention is to solve the above-mentioned problems, thereby providing a method for preventing the cantilever of a bucket wheel stacker and reclaimer from scraping against a material pile.

[0006] The above purpose is achieved through the following technical solutions: A method for preventing a bucket wheel stacker reclaimer cantilever from scraping against a material pile, the method comprising the following steps: (1) Select a suitable distance measuring sensor; (2) Select a suitable installation location for the ranging sensor; (3) The distance measuring sensor is connected to the bucket wheel excavator lifting mechanism and the cantilever conveyor control; (4) Setting the safe distance of the ranging sensor.

[0007] The method for preventing the bucket wheel stacker reclaimer boom from scraping against the material pile, the specific process of step (3) is: the action feedback signal of the distance sensor is respectively connected to the electrical control circuit of the bucket wheel machine boom lifting mechanism and the boom conveyor, so that when the distance between the lower part of the bucket wheel machine boom and the material pile exceeds the set safety distance, the bucket wheel machine boom and the boom conveyor are automatically stopped through electrical control, and after returning to the safety distance, the boom conveyor automatically starts and resumes operation.

[0008] The method for preventing the bucket wheel stacker reclaimer boom from scraping against the material pile, the specific process in the step (4) is: according to the actual situation of the bucket wheel machine during operation, determine the required safety distance between the lower part of the bucket wheel machine boom and the material pile. It is worth noting that when determining the distance, the inertial descending displacement of the boom when it descends must be fully considered. Finally, according to the determined safety distance, the action parameters of the distance measuring sensor are set and adjusted. This step can be tested and adjusted multiple times at the work site to achieve the best effect. At the same time, according to the needs, the action signal can also be connected to the alarm system of the bucket wheel machine operating room to remind the bucket wheel machine driver to grasp the situation and adjust the operation in time.

[0009] In the method for preventing the cantilever of a bucket wheel stacker from scraping against a material pile, the distance measuring sensor is an ultrasonic distance measuring sensor. Beneficial Effects

[0010] 1. The present invention realizes automatic control to always keep a safe distance between the lower part of the bucket wheel machine cantilever and the material pile by installing a distance measuring sensor at the position where the lower part of the bucket wheel machine cantilever is prone to scrape against the material pile.

[0011] 2. The present invention realizes that the lower part of the bucket wheel excavator boom and the material pile can always maintain a safe distance through automatic control, and completely avoids contact and scraping between the bucket wheel excavator boom and the material pile.

[0012] 3. The present invention solves the problem that the bucket wheel operator must always take into account the thickness of the material taken by the bucket wheel, the hardness of the material pile, and observe and judge the distance between the cantilever and the material pile, which is easy to lose sight of one thing while focusing on another, thereby improving the accuracy of the bucket wheel operator's operation.

[0013] 4. The invention requires little capital investment and is simple to construct. DETAILED DESCRIPTION

[0014] A method for preventing a bucket wheel stacker reclaimer cantilever from scraping against a material pile, the method comprising the following steps: (1) Select a suitable distance measuring sensor. Considering that bucket wheel excavators are generally located outdoors and the material pile is complex, the distance measuring sensor selected must be able to adapt to the various shapes of material piles, the possibility of mixed materials such as stones, wood blocks, metal blocks, chemical fibers, etc., as well as the low temperature in winter and the high temperature and rain in summer. At present, the more ideal is the ultrasonic distance measuring sensor, which not only meets the above conditions, but also has high distance measuring accuracy, wide distance measuring adjustment range, fast feedback speed, high action sensitivity, simple structure and installation; (2) Select a suitable installation location for the distance measuring sensor. According to the location and size of the area where the lower part of the bucket wheel crane boom is likely to contact and scrape the material pile, select the best installation point and number of installations in the area to install the distance measuring sensor; (3) The distance sensor is connected to the bucket wheel machine lifting mechanism and the cantilever conveyor control. The action feedback signal of the distance sensor is connected to the electrical control circuit of the bucket wheel machine cantilever lifting mechanism and the cantilever conveyor respectively, so that when the distance between the lower part of the bucket wheel machine cantilever and the material pile exceeds the set safety distance, the lowering of the bucket wheel machine cantilever and the rotation of the cantilever conveyor are automatically stopped through electrical control, and after returning to the safety distance, the cantilever conveyor automatically starts and resumes operation; (4) Setting the safe distance of the distance measuring sensor. According to the actual situation of the bucket wheel machine during operation, determine the required safe distance between the lower part of the bucket wheel machine boom and the material pile. It is worth noting that the inertial descent displacement when the boom is lowered should be fully considered during the determination. Finally, set and adjust the action parameters of the distance measuring sensor according to the determined safe distance. This step can be tested and adjusted multiple times at the work site to achieve the best effect. At the same time, according to needs, the action signal can also be connected to the alarm system of the bucket wheel machine operating room to remind the bucket wheel machine driver to grasp the situation and adjust the operation in time.

[0015] To solve the problem that the bucket wheel machine driver cannot observe the lower part of the boom when operating the bucket wheel machine, which easily causes the lower part of the bucket wheel suspension to scrape against the material pile, the most critical factor is not to solve the blind spot of the bucket wheel machine driver, but to solve the accuracy of the bucket wheel machine's luffing mechanism descent, so that the lower part of the bucket wheel machine boom and the material pile always maintain a certain safe distance, so that the lower part of the bucket wheel machine suspension and the material pile cannot scrape. Thus, the problem is fundamentally solved. To this end, the distance measuring sensor can be installed at the part of the lower part of the bucket wheel machine boom that is prone to scrape against the material pile, so as to achieve automatic control of the lower part of the bucket wheel machine boom and the material pile to always maintain a safe distance.

Claims

1. A method for preventing a bucket wheel stacker reclaimer cantilever from scraping against a material pile, characterized in that: The method comprises the following steps: (1) Select a suitable distance measuring sensor; (2) Select a suitable installation location for the ranging sensor; (3) The distance measuring sensor is connected to the bucket wheel excavator lifting mechanism and the cantilever conveyor control; (4) Setting the safe distance of the ranging sensor.

2. A method for preventing a bucket wheel stacker reclaimer cantilever from colliding with a material pile according to claim 1, characterized in that: The specific process of the step (3) is as follows: the action feedback signal of the distance measuring sensor is respectively connected to the electrical control circuit of the bucket wheel machine cantilever lifting mechanism and the cantilever conveyor, so that when the distance between the lower part of the bucket wheel machine cantilever and the material pile exceeds the set safety distance, the lowering of the bucket wheel machine cantilever and the rotation of the cantilever conveyor are automatically stopped through electrical control, and after returning to the safety distance, the cantilever conveyor automatically starts and resumes operation.

3. The method for preventing the bucket wheel stacker reclaimer cantilever from colliding with the material pile according to claim 1, characterized in that: The specific process of step (4) is as follows: according to the actual situation of the bucket wheel machine during operation, the required safety distance between the lower part of the bucket wheel machine boom and the material pile is determined. It is worth noting that the inertial descending displacement when the boom is lowered should be fully considered during the determination. Finally, the action parameters of the distance measuring sensor are set and adjusted according to the determined safety distance. This step can be tested and adjusted multiple times at the work site to achieve the best effect. At the same time, according to the needs, the action signal can also be connected to the alarm system of the bucket wheel machine operating room to remind the bucket wheel machine driver to grasp the situation and adjust the operation in time.

4. The method for preventing a bucket wheel stacker reclaimer cantilever from colliding with a material pile according to claim 1, characterized in that: The distance measuring sensor is an ultrasonic distance measuring sensor.