RU2363573C1 - Device for preparation of dry construction mix - Google Patents

Abstract

FIELD: technological processes.

SUBSTANCE: present invention is related to the field of construction, in particular to production of construction materials and products. Device for preparation of dry construction mix includes frame with hopper for sand, conveyor belt with drive for sand transportation, above which the main comb is installed with drive of transverse movement, which is arranged in the form of inclined trays and is equipped with hopper for cement. According to invention, device is equipped with additional comb with hopper for cement, which is installed downstream the main comb along travel of conveyor belt with the possibility of movement in reversed phase to the main comb. On additional comb trays are mounted with trays that alternate by location of lower edges above conveyor belt and with shift of adjacent trays in every pair to the side of belt motion direction. Besides additional comb is reasonable to be installed at the distance from the main one equal to width of conveyor belt. Downstream additional comb across conveyor belt there is a ripper element installed, which includes set of knives fixed in front of ripper element and set of rods fixed behind ripper element.

EFFECT: provision of possibility to introduce cement directly into sand layer.

4 cl, 8 dwg

Description

The present invention relates to the field of construction, in particular to the production of building materials and products.

A device for preparing a dry building mixture is known, including a frame with a mixing chamber mounted on it, a feed hopper for filler and a feed hopper for cementitious material (SU No. 93003747, class B28C 9/00, 1995).

The disadvantage of this device is the inability to prepare with it a homogeneous mixture.

The closest technical solution to the proposed one is a device for preparing a dry building mixture, consisting of a conveyor belt with a comb mounted on it, made in the form of oblique gutters with a transverse drive. Above the conveyor belt, at its base, there is a sand bin and a cement bin, which is connected to the conveyor belt through a comb. At the end of the conveyor belt is a hopper for the finished dry mix (RU No. 2309841, class B28C 5/36, C04B 40/00, 2007).

However, the dry mortar prepared on this equipment has reduced uniformity, while the mixing process on this equipment has low efficiency.

The objective of the invention is to increase the efficiency of the process of preparing a dry building mixture, by increasing its homogeneity.

The technical result consists in the possibility of introducing cement directly into the thickness of the sand layer.

The task and the specified technical result is achieved by the fact that in the device for preparing a dry building mixture, including a frame with a sand hopper, a conveyor belt with a drive for moving sand, over which there is a main comb with a lateral movement drive, made in the form of oblique gutters and equipped with a hopper for cement, according to the invention it is equipped with an additional comb with a hopper for cement, which is installed behind the main comb in the direction of transport the reverse belt with the ability to move in antiphase of the main comb, and on the additional comb, the grooves are mounted with alternating in the arrangement of the lower edges of the grooves above the conveyor belt and with the offset in each pair of adjacent grooves in the direction of movement of the tape. In this case, it is advisable to install an additional comb from the main one at a distance equal to the width of the conveyor belt. The lower edges of each first groove in a pair of adjacent grooves of the additional comb are located directly above the conveyor belt, and each second groove in a pair of adjacent grooves is located at a distance from the surface of the conveyor belt corresponding to half the height of the layer of transported sand, and the grooves spaced from the surface of the conveyor belt, are shifted towards the direction of movement of the tape by an amount equal to half their cross section. A ripping element is installed behind an additional comb across the conveyor belt, including a set of knives fixed to the front of the ripping element and a set of rods fixed to the back of the ripping element.

The presence of an additional comb, installed with the possibility of its lateral movement in antiphase with the main comb, as well as with alternating troughs in height, provides a more uniform distribution of cement particles over the thickness of the sand layer.

The displacement of half-deepened grooves in the direction of flow by an amount equal to half their diameter helps prevent the formation of seal zones in front of the grooves and, accordingly, increase the uniformity of the mixture.

The presence of a ripping element with a set of knives fixed in front by shear-forming processes destroys the wave-like layers of the mixture that remain after the operation of the additional comb, and a set of rods located behind the ripping element performs the function of a ripper, which contributes to an additional and more uniform distribution of cement particles and, accordingly , improving the overall performance of the device.

The invention is illustrated by drawings, where:

figure 1 shows a structural diagram of the device, side view;

figure 2 is a structural diagram of the device, a top view;

figure 3 - a device for preparing a dry building mixture, General view;

figure 4 - deepening of the main comb in the sand layer, side view;

figure 5 - deepening additionally combs in the sand layer, side view;

figure 6 - deepening of the main comb in the sand layer, front view;

figure 7 - deepening an additional comb in a layer of sand, front view;

On Fig - the location of the grooves of the second comb, top view.

A device for preparing a dry building mixture includes a frame 1 with a sand hopper 2, a conveyor belt 3 with a drive 4 for moving a sand layer 5 placed on the conveyor belt 3. A main comb 6 with a cement hopper 7 and a transverse drive is installed above the tape 3 8 (not shown in FIG.). The comb 6 is made in the form of inclined gutters 9 and is equipped with a hopper 7 for cement. Behind the main comb 6 at a distance equal to the width of the conveyor belt 3, an additional comb 10 with a hopper 11 for cement is installed in the direction of its movement. The comb 10 is installed with the ability to move in antiphase of the main comb 6. On the additional comb 10, the grooves 12 are arranged alternating in the arrangement of the lower edges of the grooves 12 above the conveyor belt 3 and with the offset in each pair of adjacent grooves 12 in the direction of movement of the belt 3. The lower edges of each first the grooves 12 in a pair of adjacent grooves of the additional comb 10 are located directly above the conveyor belt 3, and each second groove 12 in a pair of adjacent grooves is located at a distance from the surface of the conveyor cients 3 corresponding to half height of the sand layer 5 is conveyed. The grooves 12, spaced from the surface of the conveyor belt 3, are shifted in the direction of the direction of movement of the belt 3 by an amount equal to half their cross section. Behind the additional comb 10, a ripping element 13 is installed across the conveyor belt 3, including a set of knives 14 fixed to the front of the ripping element 13 and a set of rods 15 fixed to the rear. In the direction of conveyor belt 3, a hopper 16 of the finished mixture is installed.

A device for preparing a dry building mixture works as follows.

Separately prepared components, sand and cement, are loaded into a sand bunker 2 and cement bins 7 and 11, respectively (FIG. 1 and FIG. 2). When you turn on the drive 4 simultaneously with the start of movement of the conveyor belt 3 opens the hole of the hopper 2 with sand. When moving the conveyor belt 3 with a sand layer 5 of thickness h (FIG. 4), it is distributed over the entire width of the belt 3. When the sand layer approaches the main comb 6, the drive 8 is turned on and the hole of the hopper 7 with cement opens. Using the comb 6, the sand layer 5 is divided into separate layers, the thickness of which is equal to the step of the comb 6, which ensures the introduction of cement between the sand layers. A uniform distribution of sand and cement occurs with the reciprocating movement of the main comb 6 in the transverse direction with an amplitude equal to the step of the comb 6. An additional comb 10 introduces the cement to a depth equal to the thickness h of the sand layer 5, as well as to a depth equal to half the thickness h layer 5, and it moves in antiphase from the main comb 6. Then the mixture of sand and cement is mixed with a ripping element 13, namely, a set of knives 14, mounted on the front side of the element 13, and a set of rods 15, replennyh the rear side member 13. The finished mixture is poured into the hopper 16.

The current model of the device was manufactured and tested in the construction pavilion of the department "Production of building products of structures" of Tver State Technical University and showed the effectiveness of the proposed development.

Claims (4)

1. A device for preparing a dry building mixture, comprising a frame with a sand hopper, a conveyor belt with a drive for moving sand, over which a main comb with a lateral movement drive is installed, made in the form of oblique gutters and equipped with a cement hopper, characterized in that it is equipped with an additional comb with a hopper for cement, which is installed behind the main comb along the conveyor belt with the ability to move in antiphase of the main comb, p By the way, on an additional comb, the gutters are mounted alternating in the arrangement of the lower edges of the gutters above the conveyor belt and with an offset in each pair of adjacent gutters in the direction of movement of the belt. 2. The device according to claim 1, characterized in that the additional comb is installed from the main one at a distance equal to the width of the conveyor belt. 3. The device according to claim 1, characterized in that the lower edges of each first gutter in a pair of adjacent gutters of the additional comb are located directly above the conveyor belt, and each second gutter in a pair of adjacent gutters is located at a distance from the surface of the conveyor belt corresponding to half the height of the transported layer sand, and the gutters, spaced from the surface of the conveyor belt, are shifted in the direction of the direction of movement of the belt by an amount equal to half their cross section. 4. The device according to claim 1, characterized in that a ripping element is installed behind an additional comb across the conveyor belt, including a set of knives fixed to the front of the ripping element and a set of rods fixed to the back of the ripping element.

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