Spring anti-vibration engineering skills of coal crushing device

In the process of setting up the coal crusher platen (rebar installation, concrete pouring), the support system mainly relies on the support system of the bottom mold to bear the weight, and the overall stability of the support system must be ensured, and the spring isolator should be prevented from falling into the upper platform. Inside the slab concrete. In response to the above requirements, measures were taken from the following aspects: the support system of the coal crusher platen adopts the support system of <48mm@315mm full-tube scaffolding, and the calculated pole spacing is 800mm, and the pole length is all connected by the butt fasteners; For the length modulus of the steel pipe does not meet the requirements, the electric grinder is used for cutting. The horizontal crossbar step is 1000mm, and two fasteners are fastened at the intersection of the vertical and horizontal poles under the platen bottom mold. One horizontal and horizontal horizontal crossbar is attached to the bottom of the platen bottom mold at 500mm. The system is provided with 2/eight-shaped 0 scissors support reinforcement in each direction.

The template is made of 18mm thick hard nine-plywood and 100mm@100mm wood. Pay special attention to the top height of the bottom plate of the platen should be higher than the design elevation of 5mm (that is, 5mm above the top surface of the spring isolator), and the 50mm wide deformation joint on the side of the side. Use a foam board liner as shown. The fine coal crusher platen formwork support system is set up. 3 spring isolators are installed. There are 56 sets of SVN452014 spring isolators, each consisting of a spring isolator and a viscous damper. The net height is 360mm, and the base plane size is 400mm@225mm, assembled before entering the field; the spring isolator is installed on the top of the frame support beam of the coal crusher room (buttress face), the top of the buttress on the installation position of each set of spring isolator, the bottom of the platen, One piece of 300mm@300mm@16mm embedded parts is set.

Base treatment and precision requirements, remove concrete residue on the buttress surface, clean out the embedded parts of each set of spring isolator, and accurately determine the installation/cross 0 positioning control of each set of spring isolator line. The level of the buttress surface of the spring isolator installation position requires a height difference of 2 mm in its short direction and a horizontal height difference of <3 mm in its longitudinal direction; the error of each embedded part on the buttress surface is within 3 mm. When the main frame of the coal crusher room is constructed to the part, the process is used as the main control process, and the flatness and elevation of the embedded parts are strictly controlled. Installation of spring isolator 312 spring isolator cleans the buttress surface during installation and installation. After adjusting the embedding error on the buttress surface to meet the requirements, follow the steps below: install according to the spring isolator layout icon Position, place the lower non-slip gasket (ie anti-slip fiberboard), the installation direction is the same as the direction of the spring isolator base, and according to the position of the control line on the support pier/cross 0 positioning line, the anti-slip gasket adopts double-sided tape and The lower part is fixed.

The base of the spring isolator is marked in the middle, correctly placed on the non-slip gasket that has been checked, and checked again with the /cross 0 positioning control line on the buttress surface, the level of each set of spring isolator It is controlled by precision level meter and adjusted by adjusting gasket (thickness 1mm). After the adjustment of the spring isolator on each side of the buttress is completed, two [8 short steel bars are used on each side of the spring isolator base to fix the position of the spring isolator, and then the spring isolator is made of plastic cloth. The bandage is closed to prevent contamination of the concrete slurry, and special attention is paid to protecting the viscous damper. The bottom mold of the closed spring isolator installation position, and the template of the periphery of the coal crusher platen, the bottom mold joint is pasted with double-sided adhesive tape, and the top surface is pasted with wide-faced tape, the focus is on the template joint around the spring isolator. To prevent the concrete slurry from contaminating the spring isolator.

Re-measure the elevation of the spring isolator, place the adjusting washer on the upper part of the spring isolator, and another anti-slip spacer. Each set of spring isolator can be placed with an adjusting washer (thickness 110mm). The embedded part of the upper part of the spring isolator is placed, and the periphery of the embedded part is sealed with a double-sided rubber strip and a bottom mold, and the top of the spring isolator on each side of the support pier is 300mm@300mm@16mm embedded, and the vertical and horizontal <12 steel bars are used. Connected as a whole to ensure its position is accurate. The coal crusher platen (rebar installation, concrete pouring) construction on the upper part is carried out.

Demolition of the platen support system (1) The concrete maintenance of the coal crusher platen 28d and the pressure test value of the same condition maintenance test block on the site meets the requirements, the plate support system is removed, and the support system of each crusher is as The symmetrical dismantling makes the spring isolator gradually work. (2) After the coal crusher platen support system is removed, before the coal crusher is installed, the following inspections are carried out: all the pre-tightening bolts of the spring isolator are freely elastic; the spring isolator maintains a certain height; The base of the vibrator is completely separated from the main structure.

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