Thermoform for the manufacture of prestressed concrete products

 

(57) Abstract:

The invention relates to the construction materials industry, in particular to thermoformer with lids for the manufacture of prestressed concrete products. The aim of the invention is the expansion of technological capabilities thermoform. Thermoform consists of a cover, Thermalito and thermodon containing at end faces of removable stops with grooves for fitting and is supplied with power and additional termoemcali, respectively, coolant and refrigerant, with additional termodeck are located on both sides of the power termodeck and communicate with each other and with termodeck cover with the output gear and output connections. New in the proposed thermoformer is that the shape design made of independent systems of mutually cross-power termodeck passing through thermodon and provided at the ends of the lugs with the slots for pre-tensioned reinforcement, through which thermodon connected with the front sides. 8 Il.

The invention relates to the construction materials industry, in particular, to thermoformer with lids for the manufacture of pre-stressed Zhelezobeton the ASS="ptx2">

Closest to the technical nature of the proposed thermoformer is termoform for the manufacture of prestressed concrete products, consisting of lid, Thermalito and thermodon containing at end faces of removable stops with grooves for fitting and is supplied with power and additional termoemcali, respectively, coolant and refrigerant, with additional termodeck are located on both sides of the power termodeck and communicate with each other and with termodeck cover with the output gear and output connections [2].

However, the design of this termoform, allows to make those pre-stressed reinforced concrete products in which the concrete is only linear stress state, it may be, for example, the bending beam type elements - slabs, beams, girders, etc., In this case not fully used physico-mechanical properties of concrete. In other words, this thermoform does not allow to produce prestressed concrete elements such as slabs, supported on the circuit, operating in two principal planes, i.e. in the plane stress state of concrete, where the carrying capacity of a structure which is expanding the technological capabilities of thermoform.

This goal is achieved by the fact that in the known thermoformer for the manufacture of prestressed concrete products, consisting of lid, Thermalito and thermodon containing at end faces of removable stops with grooves for fitting and is supplied with power and additional termoemcali respectively for coolant and refrigerant, with additional termodeck are located on both sides of the power termodeck and communicate with each other and with termodeck cover with the output gear and output sockets shape design made of independent systems of mutually cross-power termodeck passing through thermodon and provided at the ends of the lugs with the slots for pre-tensioned reinforcement, through which thermodon connected with the front sides.

Comparative analysis with the prototype thermoform allows us to conclude that the proposed thermoform for the manufacture of prestressed concrete products differs in that shape design made of independent systems of mutually cross-power termodeck passing through thermodon and provided at the ends of the lugs with the slots for pre-tensioned reinforcement, through which thermodon connected with Thor is the alignment of the proposed solutions to other technical solutions shows what is known for various design thermoform for the manufacture of prestressed concrete products, however, in the proposed thermoformed power termodeck due to linear thermal elongation create in the working armature concrete products pre-tension and thus are functions of power equipment for tension reinforcement. During cooling of termodeck (the cooling-off period of the concrete), the latter acquires the device functions for smooth vacation tense reinforcement for concrete.

In addition, thermodon in the proposed thermoformed using heat power termodeck and circulation of the refrigerant, is a device for heat treatment of concrete and simultaneously carries out its functions as a support device, i.e., serves as a support for power termodeck. Thus, the claimed solution meets the criterion of "substantial differences".

In Fig. 1 - 8 shows schematically the design of thermoform, and Fig. 1 shows thermoform without timocracy and without concrete, and Fig. 2 - without timocracy.

The proposed thermoform (see Fig. 1 - 4) consists of a power termodeck 1, passing through thermodon 2 and is provided with an input 3 and output 4 collectors who e have slots for hard valve with anchors at the ends 6 of the manufactured concrete products 7.

Group power termodeck connected to the same power stops, forms an independent system termodeck. On thermodon 2 installed stationary 8 9 and movable end side, containing slots for hard armature 6. The hinge locks securing the end flanges 9 are connected with termopodem 2 through the holes 10 in the power stops 5 (see Fig. 2, figs.3). For sealing thermodon 2 where it passes through its outer wall power termodeck 1, provided by the sealing strip 11 (see Fig. 6), made, for example, from paronite, which tightly grip the nut 12 power termodeck 1. In Fig. 7 presents independent power termodeck 1, the sustainability of which is provided with ribs 13 and plates 14. Bearing elements of termodeck 1, free from thermodon area, dressed nut 12. In the lower part of thermodon 2 has an input sockets 15 for the refrigerant X, which passes through the entire thermodon 2 (see Fig. 3), extends through the pipe 16 fixed end termonorte 8 and communicates with termodeck 17 of the cover 18 with the output gear 19 with the pipe 20. When the nozzle 16 is made, for purposes of sealing with termodeck 17 cap 18 cone-shaped section (which, the bottom wall termodeck 17 where it passes the nozzles 16 of the end Board 8 has a socket 22 which, when the cover 18 is in the design position provides sealing for the refrigerant.

Cover 18 has mounting tabs 23.

The presented figures are not shown for more details or gaskets to ensure a proper seal gap where it passes the valve 6 through the end flanges 9 and 8, a lock for securing the cover 18 to thermodon 2, and insulation of piping and side walls of thermodon 2.

The proposed thermoform for the manufacture of prestressed concrete products works as follows.

Open face Board 9 (see Fig. 1, figs. 2), grease shuttering surface for concrete products 7, and then into the grooves of the power lugs 5 and end flanges 8 firmly establish armature 6 with anchors at the ends. Close Board 9 thermoform and turn on the system the circulation of heated coolant T start the tension of the armature 6. For this input the reservoir 3 and the power termodeck 1 continuously served the coolant with a temperature of 250 - 300oC and due to linear thermal elongation of termodeck for the first three minutes, the latter 20-40 with a temperature increase of 10 - 15oC to compensate for loss of tension in the reinforcement from the relaxation.

Next, lay and compact the concrete in the form of the product 7. Close to thermoform cover 18 so that the output pipe of the refrigerant X 16 Board 8 went into the hole with a socket 22 termodeck 17 to the upper surface of the concrete products 7.

Turning on the system the refrigerant begin X thermal treatment of concrete products 7. Pre-heated refrigerant (air) are fed through the inlet pipe 15 in thermodon 2, where he, flowing heated power termodeck 1, receives more heat and warming at the same time the upper wall of thermodon 2, warms the concrete products 7 below. Passing on through the end Board 8 in termodeck 7 cover 18 of the refrigerant X warms the upper surface of the concrete products 7. Gear 19 regulate the rate of release of refrigerant from thermoform and thereby maintain a specific mode of heat treatment of concrete products 7.

Heat treatment of concrete leading up to the start of the cooling-off period of heat treatment of concrete with simultaneous continuous flow of high temperature fluid into the power aunts concrete (the beginning of the cooling-off period) the flow of heated fluid into the power termodeck stop and at the same time the circulation system of the heat carrier T and refrigerant X is transferred to the cooling mode, i.e. power termodeck 1 and thermodon 2 served chilled as the coolant and the refrigerant with the purpose of the exposure time period of the cooling mode, heat treatment of concrete.

During cooling power termodeck 1 is shortening, and thus is a smooth vacation all intense reinforcing rods 6 in the two principal planes, i.e., generates a flat stress state of concrete products 7. Then cut off the circulation system chilled coolant T and refrigerant X, open the cover 18 and the end flanges 9, are required valves 6 and pre-stressed concrete product 7 is transported to the warehouse.

Using the proposed thermoform for the manufacture of prestressed concrete products in comparison with the prototype provides efficiency in the following areas.

1. The simple design of the proposed thermoform significantly reduces the complexity of its manufacture.

2. Increased removal of heat by the refrigerant X power termodeck during warm-up of the concrete, which increases the quality of its thermal processing.

3. This opens up the possibility of manufacturing and in the plane stress state of concrete products.

4. Due to the state of plane stress concrete products increases its load-carrying capacity, which creates economies of concrete and reinforcement.

Thermoform for the manufacture of prestressed concrete products, consisting of lid, Thermalito and thermodon containing at end faces of removable stops with grooves for fitting and is supplied with power and additional termoemcali respectively for coolant and refrigerant, with additional termodeck are located on both sides of the power termodeck and communicate with each other and with termodeck cover with the output gear and output connections, wherein the shape design made of independent systems, mutually cross-power termodeck passing through thermodon and provided at the ends of the lugs with the slots for pre-tensioned reinforcement, through which thermodon connected with the front sides.

 

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