RU2065396C1 - Semifixed reloading device - Google Patents

Abstract

FIELD: mining industry; reloading from transport of one type to another. SUBSTANCE: device has handling equipment and near-hopper platform arranged at different levels. Sides of platform are arranged at different levels over ground. Device has sectional supports, beams, roadway plate, guard railing and stop for rear wheels of dump truck. Platform is secured relative to ground of upper level by means of flat body anchored in upper level ground. Road-way plate is covered with resilient mat. Placed on roadway plate across and along platform are side blocks and truss with brackets at sides fixed on side blocks and draining material of covering. Stop for rear wheels of dump truck is secured on truss brackets with clearance left along end face of platform to let pass pushed off spilled material. Thickness of coating is chosen to provide equal coefficients of cross mounting of all beams of roadbed. EFFECT: increased mobility by increasing inertial mass. 3 dwg

Description

 The invention relates to the mining industry, in particular for loading bins in a quarry for automobile conveyor transport.

 A stationary transshipment device is known that contains technological equipment and a near-hopper platform, including a vertical retaining wall and an inclined receiving wall, which is at the same time a continuation of the bunker wall related to technological equipment (see the book "Technological equipment in quarries" edited by V. S. Vinogradov, Moscow, "Nedra", pp. 129-130, Fig. 11.4, 1981).

 Disadvantages. The reloading device is made of monolithic reinforced concrete, and the inclined wall of the area is simultaneously an element of the hopper (technological equipment). The above makes it impossible to transfer the device to the underlying horizon (after four, five steps). Therefore, the construction of transshipment devices becomes possible quite rarely. And this, in turn, increases the shoulder of automobile haulage and increases the cost of mineral resources.

 The closest in technical essence is a semi-stationary reloading device containing technological equipment and a near-hopper platform, the sides of which are located above the ground, located at different levels, on prefabricated supports, the platform includes beams, a roadway plate, a shut-off fence and an emphasis for the rear wheels of the dump truck (see .book MV Vasiliev and others. "Inclined lifts in quarries", Gosgortekhizdat, 1962, p. 49, Fig. 28).

Disadvantages. High material consumption and design complexity due to:
the use of a continuous statically indefinable design for a device that perceives horizontal loads from braking and the reaction from unloaded mineral;
the inclusion of beams in the work on a local with dynamic impact temporary load through a metal orthotropic plate of the carriageway;
the inclusion of support near-bunker site in the composition of technological equipment.

 The mobility of the reloading device is much lower than mobile technological equipment. Therefore, the reloading device is not fast enough to keep up (due to economic reasons) with the progress of mining operations. This is also hindered by the platform supports, which impart rigidity to the device.

 Task. Increasing the mobility of a semi-stationary reloading device by increasing the inertial mass of the structure, as well as reducing the metal consumption.

 The task is achieved by a semi-stationary reloading device containing technological equipment and a near-bunker platform, the sides of which are located above the ground, located at different levels, on prefabricated supports, the platform includes beams, a driveway plate, a rack fence and an emphasis for the rear wheels of the dump truck, in which according to the invention the device is equipped with an anchor in the form of a platform anchored in the soil of the upper level, a coating of drainage material with an elastic carpet is laid on the plate of the pro-thinned part m at the base, airborne blocks and truss interconnected along and across the platform, with consoles on the sides, fixed by fasteners to the airborne blocks and the drainage coating material, an emphasis for the rear wheels of the car is attached to the truss consoles with a gap along the end of the platform to pass collapsed spills, and the thickness of the drainage soil is selected from the condition of equality of the coefficients of the transverse installation of all the beams of the driving bed of the site.

 A structural element that combines the main elements of the device (beams, airborne blocks and a farm relative to the site) is a layer of drainage soil of the declared thickness. The remaining small number of connections (between the airborne units and the platform with the platform) are detachable. The above causes high profitability (and therefore mobility) of the installation and dismantling of the reloading device, including prefabricated foundations.

 Figure 1 shows a reloading device; in Fig.2 cross-sections along BB and BB of the device of Fig.1, in Fig.3 the cross section GG in Fig.1.

 The device contains technological equipment, for example, a mobile vibro-screening unit with a hopper 1 and a near-hopper platform 2, the sides of which are located above the ground located at different levels 3, 4, for example, in a quarry above the lower ledge 3 and (on the support) slightly above the upper ledge 4. The platform 2 is attached to the upper level soil by means of an anchor in the form of a platform 5, anchored at both ends with supports 6, 7 and, in the case of rocky soil, anchors 8 and 9 (see figure 1). The platform 2 is located on the supports 7, 10 and is attached to the platform 5 using hinges 11. An elastic carpet 13 (for example, made of technical rubber with a protective layer of used conveyor belts) is laid along a plate 12 of the carriageway with waterproofing, interconnected along and across the platform, onboard blocks 14, truss 15 with consoles 16 on the sides and drainage material 17 (see FIG. 2), truss 15 is fixed relative to the platform 2 by means of detachable locks 18 to the onboard 14 blocks and drainage material 17 covering the truss 15 and poper Communication 19 (see Fig. 3) between 14 airborne units. An emphasis 20 for the rear wheels of the dump truck with a clearance of 21 along the end of area 2 is attached to the farm consoles 16 to pass the spills that are bulldozed from the site. Side blocks 14 along the platform are connected by a shutoff fence 22, the posts of which are attached on anchor bolts to the blocks 14. The convenience of mounting and dismounting of the platform 2 is achieved if the beams 23 of which it consists are not connected to each other and at least the load perceived by them does not decrease. This condition is satisfied when the coating thickness 17 is determined from the condition of equality of the coefficients of the transverse installation for all beams within the driving bed of the site.

 "The coefficient of the transverse installation is the ratio of the forces in the element of the supporting structure under consideration to the total force from one column of vehicles" (see the reference book "Road terminology", M. "Transport", 1985, p. 80). Therefore, the equality of the coefficients of the transverse installation implies the equality of forces in the beams, perceiving the load from one car on the width of one lane. This is achieved if the beams are not connected to each other (do not transfer the load to each other) and the contact load from the wheels is distributed evenly to the beams of one lane. It is advisable to make unconnected beams stable, i.e. in the form of U-shaped or H-shaped. The uniformity of the distribution of the contact load is provided by the thickness of the coating of the roadway with elements 13, 19, in which the load is distributed at an angle of internal friction (in each coating layer). The coating includes a multifractional drainage material of natural (for example, gravel, crushed stone.) And artificial origin (for example, polystyrene, perforated technical rubber). The top of the coating is impregnated with a binder.

где Н рекомендуемая толщина покрытия от плиты проезжей части
L расстояние между осями балок;
П ≠ 1 целое число балок по ширине одной полосы движения;
Φ усредненный угол внутреннего трения материала покрытия;
p = 3,14159... постоянное число.To determine the required coating thickness, a formula is proposed

where H is the recommended coating thickness from the roadway plate
L is the distance between the axes of the beams;
P ≠ 1 integer number of beams across the width of one lane;
Φ is the average angle of internal friction of the coating material;
p = 3,14159 ... a constant number.

 The connection 19 between the blocks 14 across the site can be made in the form of membranes from sheet metal, expanded metal, spent conveyor belts, cables, synthetic structures, more suitable than cellular ones. On a part of the length of the device, the truss 15 is a connecting element between the blocks 14. The links 19 are attached to the blocks 14 by means of releasable locks (not shown in Fig.).

 If the site 2 is made of reinforced concrete beams, the plate 12 of the carriageway is formed from plates of a number of beams 23 installed with a slit 24 relative to each other to drain water from the drainage coating material 17.

 The support 10 is made of prefabricated, for example, metal. Base blocks 25 for supports and airborne blocks 14 are made of reinforced concrete in one formwork form.

 The reloading device operates as follows. A loaded BeLAZ heavy-duty dump truck is brought into the site in reverse and set to an abutment 20, with the following loads acting on the structure: horizontal from braking (acceleration) of the vehicle, from collision with an abutment 20 and reaction from an unloaded mining product, temporary vertical load from a loaded dump truck plus dynamic impact from vertical loading.

 The amount of movement (impulse) of the loaded dump truck through the farm 15 (with emphasis 20) due to friction is transmitted to the inert mass of the device, damped and perceived by the anchor platform 5. Therefore, it is not necessary to use a continuous statically indefinable design that complicates the installation and dismantling works. The gap 21 between the emphasis 20 and the platform 2 eliminates manual labor for cleaning the remains of spills, completely pushing them from the site with a bulldozer. The dynamic effect of the vertical load during unloading is damped by the coating 17 of the roadway slab with ties 19 and the elastic carpet 13, and the temporary contact load through the coating layer 17 of the declared thickness is evenly distributed on the beams. Therefore, no rigid connections are required (monolithic plates of adjacent beams 23, diaphragms between them) between the beams 23 for joint work under the design load. The load from the weight of the coating 17 is approximately 20% of the temporary load. And the temporary contact load in the plate 12 under the wheel of a mining truck is reduced by 10 times. The gain in contact stresses in the beam plate is approximately 8-10 times due to distribution and damping.

 Cross-links 19 in the composition of the roadway cover combine the beams in the transverse load. The collision of the dump truck onto the fence 22 is transmitted to the fences of the opposite side of the platform through the connection system 19 between the blocks 14. Due to this, the shock damping occurs with the bonds 19 and the coating 17, and the entire mass of the device is also included in the operation. 2 Support 10 with the foundation block 25 (on concrete cushion) and platform 2 is connected by articulated connections, as it is unloaded from horizontal loads. This reduces its estimated mass, which favorably affects the support of the national team (mobile).

 To transfer the reloading device, the technological equipment is moved first, and then the bunker platform 2 is dismantled. The connections 19 between the blocks 14 are disconnected and the latter are removed by a crane. The bulldozer is pushed against the floor from platform 32 and platform 5. The elastic carpet 13, at the same time, prevents the waterproofing of the slab of the roadway from damage by the bulldozer tracks. Then the carpet tapes are removed, and the beams 23 are disconnected from the platform and lifted by mounting loops, loaded onto trailers and moved to a new assembly location. Foundation blocks 25 are also subject to dismantling and moving.

 Due to the fact that there is no monolithic work, the assembly and dismantling of the reloading device can be carried out at any time of the year.

 The advantages of the transshipment device are most fully realized with the self-propelled technological equipment of the transshipment point, which, however, does not exclude its use as a stationary one, for example, in enrichment plants as part of reception centers, in the construction industry in quarries for the extraction of building materials. YYY2

Claims (1)

 Semi-stationary reloading device containing technological equipment and a near-bunker platform, the sides of which are located above the ground, located at different levels, on prefabricated supports, the platform includes beams with a roadway plate, a rack fence and an emphasis for the rear wheels of the dump truck, characterized in that the device is equipped with an anchor in the form of a platform anchored in the upper level soil, a coating of drainage material with an elastic carpet at the base, interconnected, is laid on the roadway plate along and across the platform, onboard blocks and a truss with consoles on the sides, fixed by fasteners to the onboard blocks, and drainage coating material, an emphasis for the rear wheels of the dump truck is attached to the truss consoles with a gap along the end of the platform to pass collapsed spills, and the coating thickness is chosen from the condition of equality lateral installation coefficients for all beams of the driving bed of the site.

Images