Molding shop - drawings

Introduction.

In modern market conditions, the volume of capital construction is increasing, and at the same time the structure of capital construction is changing. This, in turn, necessitates the construction of new enterprises.

I designed the molding workshop of the ZHBI plant, the construction site of which is located in Priozersk. The shop shall produce products according to the following nomenclature:

1. Dignity. - those. cockpit of "cap" type.

2. Slab of plumbing floor cockpit.

3. Ordinary block of the elevator shaft.

4. The upper block of the elevator shaft.

The plant operation mode is as follows:

• nominal number of working days per year - 262

• 8-hour shifts per day - 2

The construction of new ZHBI plants makes it possible to expand the production of prefabricated reinforced concrete, increase the level of competition in the market and ensure a reduction in the selling price for products.

Manufacturing flow chart.

Aggregates are delivered to the plant by rail on platforms. Aggregate unloading is provided by T182A scraper type unloader. The receiving hopper in winter provides for the loosening of curled aggregates by the DP60 vibration loosening machine. From the hopper, material is supplied by means of a system of belt conveyors to a closed, overpass type warehouse No. 7081384 with a capacity of 3000 m3. Distribution of material to storage compartments by types and fractions is performed by dropping trolley. For defrosting and heating of aggregates, the warehouse is equipped with steam resistors. The filler supply to the BSC service hopper is provided by a system of belt conveyors, moreover, the filler is delivered from the warehouse to the understage conveyor through bottom unloaders with vibration tray feeders. Filler is distributed by BSC service hoppers by rotary funnel.

Cement is delivered to the plant by rail in covered cars, cement cement trucks, hopper cars. Cement unloading from covered cars is provided by suction action vacuum unloader. When unloading cement, the intake device is brought into the car. Intake device is connected by corrugated hose with settling chamber, which is connected by means of corrugated hose to vacuum pump. The vacuum pump in the system creates a vacuum and cement through the intake device is sucked through the hose and supplied to the lower part of the precipitation chamber. There is a high-speed auger that picks up cement and squeezes it into the chamber of a pneumatic screw lift, in which cement in a stream of compressed air is supplied to the switch crane and then to the desired silo.

The cement warehouse was accepted according to the standard project No. 4092964, with a capacity of 480 tons and the number of silos - 4.

Silos are interconnected by overhead branch pipes. Cement, entering the silo, loses speed and most of the cement settles in the silo, a smaller residual (uninhabited) part passes through the nozzles to other silos and is deposited there. One of the silos is connected to a sleeve filter, in which air is additionally cleaned from cement dust, and purified air is released into the atmosphere by a fan .

Cement is unloaded from cement cement locomotives by compressed air through the pipeline to the switch crane and further to the silo.

Cement is discharged from car hoppers (bunker type) through bottom dischargers into a receiving hopper located between rails. From there, cement enters the receiving chamber of the pneumovint lift, into which it is fed through a cement pipeline to the crane switch, and then to the silo.

The supply of cement from silos to the BSC service hopper is provided through bottom feeders or an aerogelob using a pneumovint pump, which transports cement in a stream of compressed air through a pipeline to the above-the-bunker compartment of the BSC, where it first enters the precipitator connected to the cyclone system and sleeve filter for cleaning air from cement dust. Cement is distributed to BSC service hoppers by screw.

The BSC was adopted of the tower type according to the standard project No. 4092838. The BSC consists of one section, the preparation of the mixture is provided by the forced mixing mixer SB138A. The BSC is equipped with a set of dispensers of the 2DB series. Transportation of the prepared concrete mixture from BSC to molding stations of the forming shop is carried out by means of belt conveyors.

Production of products is provided in two spans 18 m wide and 144 m long. In the upper span there are two aggregate flow lines for the production of ordinary and upper blocks of elevator shafts, in the lower span there is a bench line for the production of sanitary and technical cabins and an aggregate flow line for the production of floor plates for sanitary and technical cabins.

On the aggregate flow lines for the production of ordinary and upper blocks of elevator shafts, the supply of concrete mixture from the BSC is carried out by a system of belt conveyors. Concrete mix is put into mold by concrete laying, concrete mix is compacted on vibration platform. Molding of ordinary blocks takes 20 minutes, and molding of upper blocks - 15 minutes. Heat treatment of ordinary units is carried out at specialized heat treatment stations for 9 hours, and upper units - in pit steaming chambers for 9 hours. After heat treatment, the mold with the product is moved by an electric bridge crane to the mold preparation station, at which the mold is unfolded, the product is removed, the mold is cleaned, its sides are closed, the mold is lubricated, and reinforcement frames are laid in it. After that, the mold with the help of an electric bridge crane moves to the molding station, where the concrete laying machine feeds the concrete mixture into the mold and levels it. Then the concrete mixture is compacted on the vibration site. The electric bridge crane moves the mold with a compacted concrete mixture to a pit steaming chamber or to a specialized heat treatment station. In winter, the product after heat treatment is kept in the workshop for 12 hours. The finished product is removed using a self-propelled trolley.

In the lower span there is a bench line for the production of sanitary and technical cabins and an aggregate flow line for the production of floor plates for sanitary and technical cabins. Consider the bench production line. The prepared concrete mixture is supplied by means of a belt conveyor. Concrete mix is laid in stands by means of cantilever concrete laying with rotary boom. After compaction of the concrete mixture and preliminary holding, the stands are covered with covers and saturated steam is supplied inside the stand. After the heat treatment and removal of the covers, the product is transported by automatic grip to the finishing conveyor, which also receives the floor plates of sanitary and technical cabins (made according to the aggregate flow technology discussed above). Finishing conveyor consists of the following posts:

1. floor slabs and sanitary equipment installation station

2. hood installation and welding station

3. post installation of sanitary equipment

4. Door Suspension Post

5. post plaster works

6. post of stuffing

7. coloring post

8. holding post for 12 hours

The rhythm of movement of the finishing conveyor is 1 hour.

After 12 hours, the finished products are delivered to the self-propelled trolley and taken to the warehouse.