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Bucket type sewage cleaning machine The garbage bucket in municipal sewage can be treated with a mobile grab sewage cleaning machine, including plastic bags, cans Chemical containers or tires, a large number of river weeds, driftwood and floating plants in rural areas, and at seawater inlets, the grab cleaner can easily remove seaweed, seaweed, jellyfish and other marine organisms. Most of the large water inlets use mobile grab cleaning machines. The water inlets that originally relied on manual cleaning can be completely replaced by this machine. This equipment is a small rotatable and telescopic combined machine.
Features of Bucket Cleaner
The monorail system of the Bucket Cleaner runs close to the grid platform, optimizing the use of work efficiency on the grid platform.
The steel structure supported by rails is easy to install
Underwater movable parts are reliable to use and require less maintenance
Maintenance is twice a year.
The wheel box meets the requirements of long life
Low sound, suitable for urban use
Working load (garbage weight)
Clearances
Remove screen debris from water inlets up to several meters deep
Suitable for vertical grates
The bucket can grab all kinds of garbage, Including tree trunks, oil drums, straw, and plastic sheets, etc.
The system does not require the installation of sewage troughs and garbage conveyors. The garbage is taken out from the grille and transported directly to the stacking area
The car moves at a speed of meters to meters. When used on a wider grille, the decontamination cycle can be shortened
Through buttons, timers, cycle timers, liquid level difference meters and remote controls signal for fully automatic control
There are problems with the movable grille decontamination machine
The main problem with the movable grille decontamination machine is during the flood season, because the Shangyang sewage treatment plant is in the flood season With large amounts of water, rapid flow, and large amounts of slag, the sewage interception main pipe will pour into a large number of grids. A large amount of garbage will block the grid bars in a short period of time, resulting in a reduction in the flow rate behind the grids and a rapid increase in the liquid level in the inlet channel. rise, at this time the following two situations will occur. If the operator finds out in time, he can quickly close the water inlet gate, effectively controlling the liquid level in the water inlet channel, and the grab can smoothly enter the grille bars, but the amount of screen slag is too large. When the resistance of the grating residue adhered to the grating bars is greater than the weight of the grab trolley, the grab bucket cannot continue to rake and stays in the mid-air of the grating bars. However, the setting program is that the next rake closing command can be transmitted only when the grab reaches the lowest part of the grating when it is descending. Therefore, the descent continues, causing the wire rope to be in a natural state without being pulled by the gravity of the grab. The wire rope is prone to misalignment at the same time. Because the grab bucket is in the mid-air of the grating bar and is not pulled by the wire rope, the grab bucket falls sideways in the direction of the movable rake due to the center of gravity. The movable rake teeth are pressed tightly against the bottom of the water inlet channel, making it impossible to close the rake. The hydraulic oil pipe is tilted sideways. Excessive angle can easily cause hydraulic pipe joints to break, crack and leak oil. ( ) If the operator does not find out in time, the amount of water and slag will increase several times instantly, causing the grating bars to be quickly blocked by slag, and the liquid level in the water inlet channel cannot be effectively controlled. At this time, the slag will completely seal the grating bars. The fixed rake of the grab bucket cannot be inserted into the fixed grating bar, and the grating residue blocked by the grating bar cannot be scraped to the middle position of the grapple bucket. The fixed rake of the grab bucket slides down from the surface of the grating bar. This state is Unable to retrieve the screen slag, it can only be a useless effort. In this case, the lifting action of the grab is normal and will not cause malfunctions such as rollover of the grab, misalignment of the wire rope, or rupture of the oil pipe. However, the impact of this state is more serious. If the fixed grille bars are completely blocked, the water level will overflow the fixed grille bars, pass directly through the surface of the water inlet canal, and directly enter the next process unit for processing, which means there is no rough grid. Screen slag, a large amount of domestic garbage, construction waste, floating objects, etc. in the screen slag will cause damage to the equipment of the next unit and have a great impact on the process. In the above two situations, the mobile grid decontamination machine cannot remove slag normally. It can only close the water inlet gate and shut down the entire factory. The screen slag adhered to the fixed grid bars can be manually removed, and then the grid can be manually controlled. The screen decontamination machine gradually removes the screen slag from the water inlet canal. Only when the screen slag is cleared can the water be fed and production resumed. Depending on the size of the slag and the degree of clogging of the screen slag, the shutdown time varies from hour to hour. The amount of water in the monthly and monthly flood periods each year depends on the blockage and downtime of the screen decontamination machine. The shutdown caused by the blockage of the grille decontamination machine not only affects the company's normal production and increases the workload of maintenance personnel, but also directly overflows the sewage from the water collection well into the river during the shutdown, seriously affecting the lives of residents downstream of the river and causing great harm. environmental pollution. In order to ensure that the grille decontamination machine can operate normally during the flood season and ensure production, it is necessary to carry out systematic transformation of the grille decontamination machine.
Measures for the transformation of bucket-type sewage cleaners
Through the above process analysis, the equipment can also ensure normal operation during the flood season and need to meet the following requirements at the same time) The fixed rake of the grab bucket every time When sliding down to the fixed grille strip, the grille strip can be effectively inserted. ) Ensure that the grab has enough gravity to break through the resistance of the grating slag and smoothly descend to the bottom of the grating bar. ) The liquid level in the water inlet channel does not exceed the set liquid level, which is below the level of the water inlet channel. ) The interval time of continuous cycle work can ensure that the maximum amount of screen slag can be effectively removed during the flood season. The current capabilities and conditions of the equipment cannot meet the above requirements. In order to meet the requirements, we carry out systematic technical transformation of the equipment. Bucket modification ( ) After calculation, the distance between the center of gravity of the grab fixed rake and the steel wire hanging rope is the gravity. The distance between the center of gravity of the movable rake and the steel wire hanging rope is the gravity. According to the moment balance formula, the additional counterweight weight is required. Add a counterweight at the distance between the movable rake and the center to make the fixed rake and the movable rake reach a balanced state, and the fixed rake teeth are in a vertical state ( ). According to the nameplate parameters of the lifting reducer, the reducer torque [] can be calculated. The maximum load of the torque grab is not enough, and the load of the grab lift reducer can be increased. Liquid level control collects the liquid level in front of the coarse grille through the liquid level meter and compares it with the set value to obtain the control amount. The water inlet valve is controlled to open or close to achieve the purpose of controlling the liquid level in front of the coarse grille. The control subroutine is as follows: The valve has There are three buttons for switch and stop. Connect the normally open contacts of the two switch buttons and the normally open contacts of the switch output relay in parallel. Connect the close button and the normally closed contacts of the stop output relay in series. The valve switch buttons and the forward and reverse contactors are interlocked. Prevent short circuit. The screen used in the central control room can be used to set the control liquid level and control the error. Improvement of walking and lifting mechanisms From the calculation of the decontamination time, it can be seen that the decontamination time of one cycle of the grab trolley is (about 10 minutes). In the early part of the flood season, there is a large amount of screen residue in the sewage, which can often cause serious blockage of the grille bars within minutes. Therefore, one cycle now takes too long and cannot meet the needs of decontamination during the flood season. From the analysis of the installation size, the walking distance and lifting distance have reached the shortest position, and there is basically no room to shorten the distance. The pause time is controlled by a time relay, and is relatively If it is too long, you can adjust the time relay to open and close the rake. The time is controlled by the hydraulic system. In the hydraulic system, the speed control valve and the relief valve are shown. By adjusting the pressure of the relief valve and adjusting the return flow of the speed control valve, the closing and opening of the rake can be accelerated. The walking speed and lifting speed are driven by the output torque of the reducer to drive the running wheels and wire drums. Since the space of the trolley is limited by the size and fixed position, it is not possible to increase the rotation speed and speed by replacing the high-power reducer. The only way is to change the direction of the running wheels. The steel wire reel is used to increase the walking and lifting speed. To shorten the decontamination time of the grille decontamination machine, the decontamination time of the grille decontamination machine can be shortened through the following three steps () The pause time is shortened. By adjusting the time relay, the pause time is adjusted from the original to each pause. The time can be shortened () Adjust the speed control valve in the hydraulic system that controls the opening and closing of the rake, increase the hydraulic transmission speed, and shorten the opening and closing time of the rake on the original basis. After the improvement, the opening and closing time becomes. ( ) According to the torque and space of the transmission reducer, the diameter of the walking wheel is changed from ∮ to ∮. The wire rope drum is changed from ∮ to ∮. Calculate the changed speed, and the walking speed can be calculated according to the formula. Lifting speed, walking and lifting speed respectively Compared with the original, it has improved and.
Analysis of the effect of the transformation of bucket type dirt cleaner
The effect of the mobile grab grid dirt remover after the technical transformation is very significant, mainly reflected in In the following aspects. The performance of chemical equipment has been improved through technical transformation and the addition of assembly weights, making the equipment run more stable, and the decontamination capacity has been greatly improved. The addition of a liquid level difference switch can quickly sense the liquid level height and liquid level difference. Interlocked with the grille decontamination machine and the gate, it can start and stop the grille decontamination machine and open and close the gate in time to control the liquid level. Send instructions through the decontamination machine and the gate to carry out timely decontamination and open and close the gate to control the liquid level, so that the equipment can be operated in a timely manner. It can also work normally in harsh environments such as flood season, which effectively reduces the equipment failure rate, reduces equipment downtime, and ensures normal production operation. Before the low-labor intensity transformation, because the equipment did not have a liquid level difference switch, increased inspections were required during flood season. frequency, the operator must manually operate the water inlet gate according to the liquid level in the water inlet canal. If it is found that the liquid level rises rapidly if it is not found in time, exceeding the specified liquid level and causing serious blockage of the grille bars, the entire plant must be stopped at this time, and maintenance personnel must go down to work. Manual slag removal from the water inlet canal. After the technical transformation, the above phenomena have been basically solved, the labor intensity of operators and maintenance personnel has been greatly reduced, and the working environment has been greatly improved. The equipment failure caused by the improvement of the surrounding environment before the transformation led to the shutdown of the entire plant. The sewage in the pipeline can only be discharged directly to the Pingshan River through overflow, causing serious harm to residents downstream of the river. After the transformation, due to the stability of the equipment, the failure rate and downtime were greatly reduced, and the sewage in the pipeline was effectively treated, which affected residents around the river and downstream. The living environment has been effectively protected. The time consumed by one cycle of decontamination of the front grille decontamination machine after the transformation of high work efficiency is by increasing the diameter of the grab lifting wire reel and the elevated guide rail running wheel, changing the pause time of each arrival, and making one cycle of decontamination The time is shortened, the decontamination efficiency is greatly improved, and the ability of rapid decontamination is also well exerted when the amount of screen slag is extremely large during the flood season. Before the large-scale production capacity transformation, a large part of the sewage needed to be discharged directly to the Pingshan River through overflow due to factors such as grid blockage during the flood season, equipment failure that required shutdown, and low decontamination efficiency, which resulted in the inflow of water not being too large, which seriously affected The company's production capacity and its ability to control and reduce pollution to society. The modified decontamination machine has stable operation, strong decontamination capacity and high efficiency. While effectively ensuring the normal operation of production, it also increases the amount of water inflow, greatly improving the company's production capacity and pollution control and emission reduction capabilities.
Summary of transformation of bucket-type cleaning machine
The mobile grab-grid cleaning machine adds counterweight to the grab, installs a liquid level difference meter to control the liquid level, and improves the travel of the trolley and the grab System technical modifications such as lifting speed, shortening the pause time, increasing the hydraulic speed of the opening and closing harrows, and changing the operating mode can effectively solve the many deficiencies that existed before the equipment modification, so that the equipment can work normally and stably during the flood season. While ensuring the stability of the equipment, Significant results have been achieved in improving equipment efficiency, expanding the company's production capacity, reducing employee labor intensity, and improving the environment around Pingshan River, ensuring normal production. However, compared with similar imported equipment, there is a big gap in both manufacturing process and equipment performance. This is mainly reflected in the weak stability of the equipment and the easy failure of auxiliary equipment and auxiliary components. This is also the case in sewage. Deal with the phenomenon that often occurs with domestic equipment in the industry. Coarse grate decontamination is the first step in the sewage treatment process and is the key equipment of the sewage treatment system. Failure of the grate decontamination machine directly affects the progress of the subsequent sewage treatment process. Since the equipment does not have backup equipment, it is necessary when the equipment fails seriously. Discontinued for maintenance. Therefore, how to optimize the overall performance of the mobile grab grid decontamination machine and ensure the stability of the equipment still needs to be studied and improved in the next step.
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