RU117891U1 - DEVICE FOR BLOWING THERMAL TUNNEL OF THE PACKING LINE AND THE VEHICLE OF THE DEVICE - Google Patents

Abstract

1. A device for blowing the heat tunnel of the packaging line, characterized in that it contains an electric motor fixed on the upper wall of the heat tunnel housing, with the shaft of which one end of the extension is connected with the possibility of height adjustment, at the other end of which the impeller is fixed, on the lower wall of the housing it is installed in the form of a box is a hot air blower with holes in its lower wall, the impeller is located in the blower cavity, which is in communication with the device air ducts fixed to the side walls of the heat tunnel housing, a plurality of holes are made in each air duct directed towards the horizontal surface of the conveyor. ! 2. The impeller of the device for blowing the thermal tunnel of the packaging line, characterized in that it contains a disc, on the periphery of which a plurality of blades are made along the perimeter, the end of each blade is inclined to the radial plane, the root and middle parts of the blade in cross sections are twisted around its axis of symmetry, in each of these sections the blade has a zigzag shape, the angles of twist of the blade in the section located closer to its root part are greater than the angles of twist of the blade in the section located at a greater distance from the root of the blade, and each twist angle is located between the tangent passing through the midpoint the surface of the blade in its section, and the tangent passing through the extreme point located at the end of the blade.

Description

These technical solutions relate to the means of heating the shrink film in which the packaged product is wrapped, in order to shrink the film during its subsequent cooling. Technical solutions are intended for use in thermal tunnels of packaging lines with high productivity.

A well-known shrink chamber containing movable front and blank rear walls, as well as a movable horizontal pan, mounted with the possibility of reciprocating movement (RU 5171U1, 16.10.1997).

A known installation for packaging products in shrink film containing a housing, inside of which there are heating elements, a fan, a protective partition, a welding device, characterized in that the casing is additionally equipped with a lattice tray, a rotary damper and two reflectors, the first of which is located in a horizontal the plane under the grate tray in the suction area of the fan installed in the lower part of the housing, and the second is located in a vertical plane passing under the first reflect a box between the fan and the protective partition with the possibility of directional blowing of the heating elements installed along the housing wall and separated from the working area by a rotary damper installed in the upper part of the housing and a protective partition made vertically and reaching the plane of the first reflector, while the housing additionally equipped with a box-shaped lid, along the perimeter of the lower part of which at least two adjacent sides are placed linear heaters welding a device (RU 95118220A, 10.10.1997).

A device is known for packaging products and their sets in a shrink film containing a heat chamber, fans, a unit for supplying products to a heat chamber in the form of a table with a tabletop rotatable in a horizontal plane having a T-shaped cross section, and in this device the bottom of the heat chamber is made with a through slot, having an arc trajectory coinciding with the trajectory of the lower part of the cross-section of the countertop, the fans are installed near the countertop, two on each side, with the possibility of blowing from above and below of the product lying on it, the countertop is made in the form of three circumferential planes formed by a lattice surface, and the thermal knife and the fan unit are located around the circumference of the table near the countertop (RU 2148542C1,10.05.2000).

A known installation for packaging piece or a group of products in a shrink film containing a frame on which a heat-shrink chamber of a passage type with a conveyor in the lower part is located behind the heat cutter (RU 2170195 C2, 07/10/2001).

Known furnace for thermal shrinkage of the packaging film, comprising a housing with double compartments and a double vault, a fan for circulating air with an impeller in the vault and heaters in the side compartments, the inner frame contains a double under, divided by transverse partitions into channels connected alternately with the right and left side compartments (RU 2127697 C1, B65B 53/06, 03/20/1999).

Known shrink tunnel for shrink shrink film on the packaging, in the tunnel there is at least one heater having a burner for receiving hot gas, while the tunnel contains a housing and a conveyor located therein (RU 2009140093A, B65B 53/06, 05/10/2011 )

A known conveyor furnace containing a forced convection chamber, including a fan, heating elements, ducts with perforated diffusers of heated air to the packages in shrink film, a conveyor is located in the chamber, the shrink tunnel housing has inlet and outlet openings closed by elastic curtains (RU 97100025A. B65B 53 / 06.10.11.1998).

A known furnace for packaging products in shrink film by using heated air currents, containing a conveyor, the outer and inner frames of the furnace, the inner frame is made with side shutoffs, the circulation fan has an impeller in the arch, the furnace has a heater, with at least one from the transverse channels in the inlet part of the furnace, a nozzle is installed, connected to the air channel with a side compartment, and the remaining compartments have guiding reflectors of air flows (RU 2240966 C2, 11/27/2004 and RU 2003100213/12, 03.20.1999, B65 B 53/06).

A known electric tunnel tunnel oven containing a thermally insulated casing, in which there are two channels, each of which is equipped with means for automatically supporting the set temperature conditions (RU 97100025A, B65B 53/06, 10.11.1998).

Known furnace for thermal shrinkage of the packaging film, containing the conveyor, the outer and inner frames with side compartments, a double arch and a hearth, a circulation fan with an impeller in the arch and heaters in the side compartments, and in order to improve the heating and shrinkage of the film, under the inner frame is divided partitions on the channels connected alternately with the right and left side compartments (RU 97106305A, B65B 53/06, 04/27/1999).

A close technical solution to the technical solution presented in this description is a device for blowing the heat tunnel of the packaging line, characterized in that it contains an electric motor fixed to the upper wall of the body of the thermal tunnel, the longitudinal axis of the electric motor and its shaft are located vertically to the longitudinal axis of the thermal tunnel, the impeller is connected to the shaft ( RU 2011123450/13 dated 06/09/2011 and RU 2011123447/13 dated 06/09/2011 with decisions to grant a patent in the name of the same applicant or, (RU 111111 U1, 12/10/2011; RU 11102U1, 12/10/2011),

Impellers for air injection are also known, each of which contains a disk and rotor blades located on the periphery of the disk (RU 2426012C2, F04D 29/38, 07/20/2008; RU 19141U1, F24F 7/00, 08/10/2001; RU 2025510C1, C21D 9 / 67, 12/30/1994).

In known packaging lines, their productivity depends on the speed and uniformity of heating of the shrink film in the heat tunnel at the output of the packaging line. If the temperature in the shrink tunnel chamber increases and the speed of movement of the products packaged in the film in the shrink tunnel increases, the film warms up unevenly, resulting in the formation of stress concentrations in the film and its breaks, while the packaging quality decreases.

The technical result of the technical solutions presented in this description is to improve the quality of packaging products in shrink film and the performance of the heat tunnel.

The technical result is obtained by a device for blowing a heat tunnel of a packaging line, characterized in that it comprises an electric motor fixed to the upper wall of the housing of the thermal tunnel, the flange of which is bolted to the upper wall of the housing, the longitudinal axis of the electric motor and its shaft are vertically to the longitudinal axis of the thermal tunnel, with the shaft stationary with the possibility of height adjustment, one end of the extension cord is connected, on the other end of which an impeller is fixed, on the lower wall of the casing is installed in the form of a duct, a hot air blower with holes in its bottom wall, the impeller is located in the blower cavity, which is in communication with the device’s ducts fixed to the side walls of the heat tunnel, and in each duct there are many holes directed towards the horizontal surface of the conveyor, the extension cord is located in the holes of the upper and lower walls of the housing.

The extension cord is made in the form of a cylindrical sleeve, one end of which is mounted on the motor shaft with the possibility of its fixation and movement in the vertical direction, for which the shaft has a longitudinal groove at the end, in which there is a pin screwed in the wall of the sleeve, and in the inner cavity of the other end of the sleeve the thread is made and the upper flange with the central hole is docked to the end of this sleeve end, the lower flange with the central hole is located under the upper flange, the impeller disk is clamped between the flanges locked into the threaded end of the sleeve.

The technical result is obtained by the impeller of a device containing a disk, on the periphery of which many blades are made around the perimeter, the end of each blade is inclined to the radial plane, the root and middle parts of the blade in cross sections are twisted around its axis of symmetry, in each of these sections the blade has a zigzag shape, the blade rotation angles in a section closer to its root part, greater than the blade rotation angles in a section located at a greater distance from the root of the blade, and each spin angle located between the tangent passing through the midpoint of the surface of the blade in its section, and the tangent passing through the extreme point located at the end of the blade.

The specified performance of the cross sections of the blades increases the performance of the hot air in the heat tunnel and reduces noise.

Figure 1 shows a device for blowing the heat tunnel.

Figure 2 - node device.

Figure 3 - impeller of the device.

Figure 4 is a fragment of the impeller in an enlarged view.

Figure 5 is a view A in figure 3.

In Fig.6 is a section bB in Fig.4.

In Fig.7 is a section bb in Fig.4.

On Fig - scan blanks of the impeller.

In Fig.9 is a view of G in Fig.8.

Figure 10 is a section DD in figure 8.

Figure 11 is a cross-section EE in figure 1.

A device for blowing the heat tunnel of the packaging line contains a flange motor 2 fixed to the upper wall 1 of the body of the heat tunnel (Fig. 1), the flange 3 of which is bolted to the upper wall, while the longitudinal axis of the electric motor and its shaft 4 is located vertically with respect to the longitudinal axis of the heat tunnel. On the shaft 4 (figure 2) installed extension cord, made in the form of a cylindrical sleeve 5.

The extension cord is mounted on the shaft 4 with the possibility of its movement in the vertical direction and the possibility of fixing on the shaft in the working position of the device. To do this, at one end, the shaft 4 has a longitudinal groove in which a pin 6 is located, screwed into the wall of the sleeve 5. A thread is made in the inner cavity of the other end of the extension sleeve, a flange 7 is attached to the end of the sleeve end with a central hole in it. Under the flange 7 of the sleeve 5 is located the lower flange 8 of the device with a Central hole. Between the flange 7 of the sleeve and the lower flange 8, the impeller disk 10 is clamped by a bolt 9, for which the bolt is screwed into the threaded end of the sleeve 5 of the extension cord from the side of the sleeve end.

Under the upper wall 1 of the housing is located the lower wall 11 of the housing and between these walls is a thermal insulator 12 made of heat-insulating material. Under the bottom wall 11 of the housing 1 there is a supercharger 13 attached to it, made in the form of a duct with air intake holes 14 in the lower wall of the duct for collecting hot air from the heat tunnel chamber. A cavity of the blower 13 is formed between the bottom wall of the heat tunnel and the bottom wall of the box, and an impeller 10 is located in this cavity. The extension sleeve 5 is located in the heat insulator layer 12 and in the holes that are made in the upper wall 1 and the lower wall 11 of the heat tunnel body. In these holes, the sleeve is fixed from its radial movements.

The impeller 10 of the device (FIGS. 3-10) is a circular disk made of a metal sheet, on the periphery of which there are many blades 15. A end of each blade is inclined at an angle a to the radial plane (FIG. 5), and the root and middle parts the blades in cross sections BB (FIG. 6) and BB (FIG. 7) are twisted in such a way that in each of these sections the blade has a zigzag, approximately S-shape. Moreover, the angles In the twist of the scapula in the section located closer to its root part at a distance of 1/3 of the height of the scapula are in the range of 45 to 90 degrees, and the angles of twist of the scapula in the section located at a distance of 2/3 of the scapular height are in the range of 15 to 45 degrees. The twist angle refers to the angle between the tangent 16 (Fig.6), passing through the midpoint of the surface of the blade in the plane of the cross section, and tangent 16, passing through the extreme point of the surface of the blade, which is located at its end. The described embodiment of the impeller is selected from the condition of ensuring minimum vibrations and noise at its maximum productivity of supplying hot air to the heat tunnel. In the supercharger 13 (Fig. 11), the output channels 17 are made, connected with the cavities 18 of the device located between the side walls 19 and the ducts 20 in the casing of the heat tunnel with each of its longitudinal side.

Each cavity 18 is in communication with the chamber 21 of the thermal tunnel through a plurality of holes 22 made in each duct 20 in the form of longitudinal slots along the length of the duct. Each duct is fixed to the side wall 19 of the thermal tunnel. Each hole 22 is directed toward the longitudinal horizontal surface of the conveyor 23 so that the axis 24 of each hole 22 is inclined to the horizontal surface of the conveyor (Fig. 12). Electric heaters 25 are located between each duct 20 and the side wall 19. To reduce heat loss, the heat insulator is also located under the heat tunnel chamber 21 and under the conveyor tracks closing the heat tunnel from below. Figure 11 shows the openings 26 of the heat tunnel, the slit 27 between the shutters 28, the film 29 and the products 30 therein, as well as the tracks 31 of the conveyor 32, conditionally shown in figure 1 is an electric fan 33 and a thermal insulator 34 (figure 11) of the conveyor.

The device operates as follows. Cold (unheated) air (Fig. 1) enters through the openings 26 of the thermal tunnel, covered with curtains, and the slit 27 between the curtains 28, into the chamber 21 (Figure 11) of the thermal tunnel. By the impeller 10, the preheated air in the chamber 21 is drawn upward, enters the supercharger 13, from where the air is pumped through the outlet channels 17 by the supercharger 13 into the cavity 18, where it is heated by the electric heaters 25. The hot air heated by the electric heaters exits under pressure through the openings 22 of the air ducts 20 into the chamber 21 obliquely in the direction of the axis 24 of each hole, meets with unheated air coming through these slots, having a lower heating temperature, mixes with this air and is drawn again rylchatkoy 10 to the plenum 13, the hot air heats the film 29 to which the packaged products 30.

Select the thermal mode of heating shrink film, in which the product is wrapped and set in the chamber 21 the air temperature necessary for quick and uniform heating of the film. The tracks 31 of the conveyor 32 move the product in the direction of the arrows (Fig. 1) continuously, introduce it into the heat tunnel and out of the heat tunnel and at the exit.

The device for blowing the heat tunnel due to the described active intensive air heat exchange in the chamber eliminates underheating and overheating of the film in its various zones, eliminates uneven heating of the film and the concentration of stresses in the film during its cooling and shrinkage. At the same time, the described design of the impeller, which is made from the condition of ensuring minimal vibration and noise, provides the maximum possible vacuum in the zone of its rise in the blower 13 and the maximum possible pressure of hot air in the ducts 18 with a significant increase in the performance of supplying hot air to the heat tunnel. All this positively affects the performance of the shrink tunnel and the quality of packaging products in shrink film.

Claims (2)

1. Device for blowing the heat tunnel of the packaging line, characterized in that it comprises an electric motor fixed to the upper wall of the body of the heat tunnel, with one end of the extension cord connected to it with a height adjustment, the impeller is fixed at the other end, and the in the form of a duct a hot air blower with holes in its bottom wall, the impeller is located in the blower cavity, which is in communication with the device’s air ducts fixed to the side th termotonnenelya housing walls, each duct provided with a plurality of apertures directed towards the horizontal surface of the conveyor. 2. The impeller of the device for blowing the heat tunnel of the packaging line, characterized in that it contains a disk, on the periphery of which there are many blades along the perimeter, the end of each blade is inclined to the radial plane, the root and middle parts of the blade are twisted in cross sections around its axis of symmetry, in each of these sections, the blade has a zigzag shape, the angles of twist of the blade in the section located closer to its root part, more than the angles of twist of the blade in the section located at a greater distance from the root hand side of the blade, and each angle of twist is situated between the tangent passing through the midpoint of the blade surface in its cross section and the tangent passing through the outermost point, located at the end of the blade.