JP2008503667A - Antifreeze spraying device - Google Patents

Abstract

  The present invention relates to an antifreezing agent spraying device for an antifreezing agent spraying vehicle having a transport worm (2) for transporting the antifreezing agent from the antifreezing agent tank to the downcomer opening. A stirring device (81) is provided between the end of the transport worm and the downcomer opening. From there, the cryoprotectant can be moved unimpeded into the downcomer opening (3) and further to the spreading tray (14) which is located in a lower position. Connected to the downcomer opening is a downcomer (11) or chute that has a first, preferably arcuate portion (12), which also has a downcomer or chute. It is led into the second part (13) implemented as a chute. This second part has a different angle of inclination in order to redirect the antifreeze supplied from the first part.

Description

  The present invention provides an antifreezing agent discharged from an antifreezing agent tank in a substantially horizontal direction by utilizing centrifugal force action to a rotating spraying tray, particularly for an antifreezing agent spraying vehicle. The present invention relates to an antifreezing agent spraying device according to the superordinate concept of claims 1 to 12.

  For the production of a uniform antifreeze layer, it is important to provide a uniform and continuous antifreeze agent under changing basic conditions. In particular, when the amount of antifreezing agent sprayed is small, there is a possibility that the supply of the antifreezing agent to the spraying tray will be intermittent. This problem occurs especially in the case of spraying of salts with a residual moisture content of 0.5 to 3% by weight. This is because salt containing residual moisture tends to agglomerate and is therefore sometimes discharged intermittently from the cryoprotectant tank.

  The antifreeze is carried away from the downwardly tapered container, i.e. the antifreeze agent tank, usually by a transport element such as a transport belt or transport worm. In the case of a transport worm, this worm extends along a U-shaped trench at the bottom of the container and through a transport pipe other than the container to an opening on the downcomer or chute connected to the spreading plate. The transport worm is usually composed of a screw-shaped metal plate that is radially wound around a drive shaft on a spoke-like support. Each time the transport worm rotates, a certain amount of antifreezing agent is discharged from the free end of the worm, and the certain amount of antifreezing agent becomes more intermittent later as the moisture content of the antifreezing agent increases. Separated from supplied antifreeze.

  In order to achieve a uniform antifreeze discharge, DE 39 09 868 C2 proposes that a tubular tank is provided between the end of the conveying worm and the upper opening of the downcomer. . The length of the tank is at least one third of the diameter of the transport worm. At the end of the tank, there is a gravity-loaded or spring-loaded swaying damming flap immediately before the downcomer opening, and the antifreezing agent is dammed toward the damming flap. It is transported until a sufficiently high transport pressure is created that results in the opening of the flap. Further, at the end of the transport worm, the spiral portion on the entire surface is formed in two lines in order to double the pulsation frequency and halve the pulsation amount accordingly. This constant transfer flow rate results in a substantially constant opening width between the weir flap and the end of the transfer tube, which prevents almost constant freezing of the downcomer and the sprinkler pan placed below it. A flow of agent is obtained.

  Also, when the spreading pan is rotated to move the spreading pattern, the weir flap with spring load is lowered so that the weir flap rotates together when the downcomer including the spreading plate rotates. It is also known to incorporate it in a substantially horizontal position in the tube.

  However, it has become clear that the problem of pulsation, particularly in the application of road salt containing residual moisture, has not been fully solved. On the contrary, spring loaded weir flaps can cause increased pulsations.

  The object of the present invention is to propose an anti-freezing agent spraying device, in particular an anti-freezing agent spraying device with reduced pulsation, which can achieve a uniform spraying pattern even in the case of completely different amounts of anti-freezing agent and humidity. That is.

  This problem is solved by an antifreeze spraying device having the features of independent claims 1 and 12. In the subordinate claims, advantageous effects and embodiments of the invention are indicated.

  It is essential to the present invention that the damming elements, which are arranged between the conveying means, in particular the conveying worm and the lower end of the downcomer above the spreading pan, and generate a counter pressure, are completely unnecessary. Instead, means, in particular a stirring device, are provided for dividing the mass accumulation of the cryoprotectant into the area between the end of the conveying worm and the upper opening of the downcomer. This stirrer can be used to split road salt containing residual moisture which tends to form clumps, especially before falling into the downcomer. The road salt thus flows unimpeded and in particular without back pressure to the spreading tray.

  As the mass accumulation and division means, any means that acts on the antifreezing agent by a mechanical driving method such as striking or pulverizing, preferably means for stirring can be used.

  The agitator comprises one or more rows of stirring elements distributed over the entire circumference of the extension of the worm shaft, in particular one or more pins protruding from the extension of the worm shaft in a strictly radial direction and preferably with different axial tilt angles. Preferably it consists of. These different axial tilt angles enhance the dividing action in the stirrer. The striking device can be operated like a pin, but requires a flail type element. The grinding device may be provided with one or more cylinders or rollers.

  Only one row of pins may be sufficient. The pin array is preferably arranged away from the end of the worm at a distance of at least one third of the diameter of the worm to create an inactive area at the discharge end of the worm, and preferably an opening to the downcomer It is placed just before the department. Two rows of pins may advantageously be provided, with the first row at the end of this inactive area and the second row just before or at the edge of the downcomer opening. Provided. Still another pin row may be arranged above the downcomer opening, particularly for the use of road salt containing residual moisture which tends to form agglomerates.

  Excessive pins and excessive pin arrays can cause clogging when road salt containing residual moisture is being sprayed. Accordingly, the pin rows are preferably limited to 1 to 3 rows each having 3 to 8 pins, particularly 5 pins each. Each pin row is evenly distributed over the entire circumference. Preferably, the pins of adjacent pin rows are arranged alternately.

  A similar arrangement is possible for the striking device or the grinding device. Such a combination of devices may also be provided as the mass accumulation and division means.

  The discharge end of the transfer tube on the side of the downcomer opening opposite the transfer worm is provided with a lining made of polyurethane, in particular PU material known as “Vulkolan”. Vulkollan has a smooth surface, so that it is particularly effective to prevent the antifreeze from adhering, and as a result, the antifreeze transported over the downcomer opening slides down from the bulcolan lining into the downcomer.

  The auxiliary means according to the embodiment of the downcomer or chute described below is used to further improve uniform antifreeze discharge. However, the advantages associated therewith are also achieved independently by the above means (stirrer, inactive area), so that it is particularly useful to stop rotation of the cryoprotectant flow, as described below. It is considered the right place. Also, in the downcomer or chute embodiments described below, it is not important whether the cryoprotectant is conveyed from the cryoprotectant tank to the downcomer opening by a transport worm, transport belt or other transport means.

  Thus, the problem of a spray pattern that is as uniform as possible is solved by features of further independent device claims.

  In other words, when the spreader is swung to move the spray pattern together with the downcomer to which the spreader is attached, the antifreeze that is normally guided to the spreader through the inclined downcomer is different from the spreader. I found that it reached the area. Therefore, the spray pattern changes in an undesirable way.

  This phenomenon can be attributed to the fact that the antifreeze does not slide down the downcomer or chute linearly but rather draws a sinusoidal drop curve. The exact shape of the drop curve depends, for example, on the area of the inner wall of the inclined downcomer that the cryoprotectant flowing through the downcomer opening reaches, and at which point the antifreeze flow is reached It also depends on whether it has such rotation. In particular, the dry road salt antifreeze stream has a substantially stronger rotation after exiting the transport worm than the road salt containing residual moisture. This rotation is still enhanced by the agitating pin rotating in the same direction, whereas the agitating pin has a lesser rotational effect on road salt containing residual moisture.

  This rotation is sufficiently removed from the cryoprotectant flow by a single or preferably overlapping turn in the downcomer or chute. To this end, the preferred embodiment of the present invention provides a generally straight downcomer or arcuate portion connected upstream of the straight chute, ie, for example, a downcomer arcuate or a chute arcuate portion. Has been. This causes the cryoprotectant to first fall into the arcuate part, where it is deflected, for example, in the direction opposite to the original conveying direction, and then enters the inclined downcomer or into the inclined chute. Reach These inclined downcomers or inclined chutes preferably have an inclination direction of about 70 ° relative to the horizontal, opposite to the arcuate part. In order to redirect the flow of the cryoprotectant in an overlapping manner, the downcomer arcuate portion may have a plurality of curved or diverting portions, or the plurality of downcomer arcuate portions in turn. It may be arranged.

  In order to further reduce the rotation, the conveying worm can be formed in a single line up to the discharge end as in the previous spraying device. Correspondingly, on the basis of the smaller pitch, the translation transfer is increased relative to the rotation transfer, so that the rotation of the antifreeze flow and consequently the amplitude of the sinusoidal drop curve is correspondingly reduced. . This doubles the amount of pulsation per rotation compared to a transport worm having two ends, but this vibration is caused by the inactive area, the subsequent stirring pin, and especially the downcomer or chute. Leveled by an arcuate part.

  Finally, it is advantageous for the transport tube to be formed as a concave trench following the transport worm and above the downcomer opening. In the inactive area and in the subsequent agitation area, the cryoprotectant automatically concentrates at the bottom of the trench before reaching the edge of the downcomer opening and falls into the downcomer as a focused flow.

  Embodiments of the present invention will now be described with reference to the accompanying drawings.

  This only figure is a partial cross-sectional view showing an anti-freezing agent spraying device for an anti-freezing vehicle in a neutral position, i.e., a non-rotating position, having a conveying pipe 1. Via the transport pipe 1, the transport worm 2 sends road salt from a road salt tank (not shown) to the downcomer opening 3 at the end of the transport pipe 1. The transport pipe 1 is formed as a concave trench within a range beyond the transport worm 2 and the downcomer opening 3. The transport worm is composed of a metal plate 4 wound around a drive shaft 5 in a screw shape and fixed to the drive shaft via radial spokes 6. In the extension portion 7 of the drive shaft 5, two radial pin rows are provided at a distance a from the end of the transport worm 2 and spaced from each other by a distance b. Each of these two pin rows 8 includes five pins 9 that are evenly distributed around the drive shaft 5 and extend strictly radially outward from the drive shaft 5.

  The distance a between the end of the transport worm 2 and the pin row 8 closest to the transport worm defines an inactive area, and the road salt transported by the transport worm 2 is cylindrical in this inactive area. It sinks to the bottom of the transfer tube 1. The pin 9 that rotates on the drive shaft 5 together with the transport worm 2 agitates the road salt that is further pushed toward the downcomer opening 3 by the road salt that is transported later, and thereby divides the mass accumulation. . This dividing action is reinforced by the second pin row 8 in the transport direction. The second pin row 8 is disposed slightly before the edge 16 of the downcomer opening 3, but may be disposed directly at the edge 16.

  In the inactive region, some rotation of the antifreeze flow is lost, but a slight additional rotation is caused by the rotating pin train.

  The inactive area defined by the distance a between the first row of pins 8 in the transport direction and the end of the transport worm 2 extends over a transport distance corresponding to approximately one third or more of the diameter of the transport worm. ing. Preferably, the conveying worm has a diameter of 150 mm to 200 mm. When the diameter of the transport worm is 180 mm, the distance a is, for example, 70 mm. The distance b to the next closest pin row 8 is, for example, 50 mm. The distance c between the second pin row and the center of the downcomer opening 3 is, for example, 65 mm. Furthermore, the pin rows 8 may be provided so that they are preferably arranged at approximately the same distance b from each other. It is therefore particularly possible in this case to have a third pin row 8 installed above the downcomer opening 3. Such a third pin row is particularly significant when road salt having a residual moisture of 0.5% to 3%, which tends to form a mass accumulation, is applied.

  A lining 10 made of bulcolan is provided at the end of the transport pipe 1, and the lining enters a tab-like shape into the downcomer opening 3. Therefore, the road salt conveyed over the downcomer opening 3 slides down into the downcomer opening 3 from the very smooth surface of the bulcolan lining 10.

  A downcomer 11 is connected to the downcomer opening 3 and comprises a first arcuate part 12, a second straight inclined part 13 and a third straight but vertical part 18. The downcomer arcuate portion 12 initially extends vertically downward from the downcomer opening 3 and then arcs against the transport direction of the transport worm 2. In the illustrated embodiment, the downcomer arc 12 has a constant diameter, such as about 2/3 of the diameter of the worm, i.e., 115 mm for a transport worm having a diameter of, for example, 180 mm. The downcomer arcuate portion may be bent in the transport direction. The part 13 is then inclined in the opposite direction with respect to the normal.

  Unlike the illustrated embodiment, the downcomer opening 3 is provided with a conveying worm in order to ensure that dried salt as well as road salt having a residual moisture content of up to 3% can be reliably sprayed using the antifreeze spraying device. The downcomer arcuate section 12 is conically spread with respect to the downcomer opening 3 so as to have an aperture that is about 3/4 of the diameter of the tube, i.e. 135 mm for a transport worm having a diameter of 180 mm, for example. That is reasonable. This larger diameter prevents the downcomer opening 3 from being clogged with road salt containing residual moisture accumulated in bulk.

  The downcomer arc 12 substantially serves to stop rotation resulting from the transport of road salt worms. The aim is to reach the second part 13 of the downcomer 11 where the sprayed salt from the downcomer arc 12 functions as a chute without any rotation, so that the road salt further travels along a straight path. It is to reach a preset area of the spreader 14 arranged under the downcomer 11.

  In order to ensure that the road salt dropped through the downcomer opening 3 first actually reaches the downcomer arcuate part 12 and then drops down to the downcomer chute 13, the downcomer arcuate part 12. Is in the lower part of the downcomer so that its lowermost end 15 is arranged in front of the edge 16 of the downcomer opening 3 in the transport direction of the transport worm 2.

  In the preferred embodiment shown, the downcomer arc 12 enters the lower portion 13 of the downcomer 11 beyond a curved angle of about 60 °, and this lower portion has an inclination angle α with respect to the horizontal of 70. With a chute that is °. This is only a preferred value. The inclination angle α of the downcomer chute 13 may be 60 ° to 80 °. The diameter of the downcomer is also preferably 3/4 of the diameter of the transport worm, i.e. 135 mm, for example in the case of a transport worm having a diameter of 180 mm.

  The lower end 17 of the second part 13 of the downcomer goes into the third part 18 of the downcomer that is vertical. As a result, the flow direction of the antifreezing agent is further changed before reaching the spreader 14. The third part of the downcomer may be inclined or bent. Depending on the case, the direction change part may be further provided in the flow path of the antifreezing agent to the spreading plate. With each turn, the flow further loses some rotation.

It is a fragmentary sectional view showing the antifreezing agent spraying device for antifreezing vehicles.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Conveyance pipe 2 Conveyance worm 3 Descent pipe opening part 4 Metal plate 5 Drive shaft 6 Spoke 7 Extension part of the drive shaft 5 Pin row 9 Pin 10 Tab 11 made from Vulkolan Descent pipe 12 First part of down pipe, down pipe Arcuate part 13 Second part of downcomer 14 Spreading tray 15 Lower end part 16 of downcomer arcuate part 12 Edge 17 of downcomer opening 3 Lower part of second part of downcomer pipe 18 Third part of downcomer pipe Part of

Claims (18)

  In the conveying means (2) for conveying the antifreezing agent from the antifreezing agent tank to the opening (3), particularly in the antifreezing agent spraying device having a conveying worm, the antifreezing agent passes through the opening and the gravity The antifreezing agent spraying device is transported to the downcomer pipe (11) connected to the spraying tray (14) by the transporting means (2) and ends at a distance in front of the opening (3). Means (8) driven and moved to divide the mass accumulation of the cryoprotectant between the end of (2) and the opening (3), in particular a stirrer, are provided, said freeze protection The agent can flow unimpeded from the mass accumulation and division means (8) into the opening (3) and further through the downcomer (11) to the spreading plate (14). Antifreeze spraying device.   When the lump stacking and dividing means (8) is separated from the end of the conveying means (2) by the distance (a), and the distance (a) uses the conveying worm as the conveying means, the conveying The apparatus of claim 1, wherein the apparatus is about 1/3 or more of the diameter of the worm.   When the mass accumulating and dividing means (8) includes a rotating element (9), in particular, a pin, and these rotating elements use a conveying worm as the conveying means, together with a drive shaft (5) for driving the conveying worm (2) The apparatus according to claim 1, wherein the apparatus rotates.   Device according to claim 3, wherein the element (9) has a different inclination angle with respect to the axis of rotation of the drive shaft (5).   The element (9) forms one or more element rows (8), each of which is distributed from 3 to 8, preferably 5 elements (9) distributed around the drive shaft (5). 5. The device according to claim 3 or 4, comprising:   6. The device according to claim 5, wherein the stirring device comprises one or more, preferably three element rows (8) arranged at a distance from one another along the axial direction of the drive shaft (5).   7. The device according to claim 6, wherein the elements (9) of the element rows (8) adjacent to each other are staggered relative to each other.   Device according to any one of claims 5 to 7, wherein at least the element row (8) furthest away from the end of the conveying means (2) is arranged above the opening (3).   Device according to any one of claims 1 to 8, wherein the area between the end of the conveying means (2) and the opening (3) is formed as a concave trench.   10. A device according to any one of the preceding claims, wherein the transport means (2) is formed as a single transport worm.   A lining (10) made of polyurethane is provided, by which the cryoprotectant conveyed beyond the opening (3) is guided into the opening (3). The apparatus of any one of Claims.   Conveying means (2) for conveying the antifreezing agent from the antifreezing agent tank to the opening (3), in particular, an antifreezing agent spraying device having a conveying worm, wherein the antifreezing agent passes through the opening. Is transported by gravity to the downcomer pipe (11) connected to the spray tray (14), the downcomer pipe opening (3) is connected to the downcomer pipe (11) or chute, and the lower end part of the downcomer pipe or chute (15) Is led into the second part (13), the second part is implemented as a downcomer or chute and redirects the antifreeze supplied from the first part (12) Therefore, the antifreezing agent spraying device has an inclination angle different from that of the first part (12).   Device according to claim 12, wherein the first part (12) is bent.   Said second part (13) is led at its lower end (17) into a further part (18), said further part being implemented as a downcomer or chute and said second part (13) 14. Device according to claim 12 or 13, having a different angle of inclination compared to the second part (13) in order to redirect the cryoprotectant supplied from the second part (13) again.   The first and / or second part (12, 13) is followed by the part (13 or 18), respectively, when the following part (13 or 18) is formed as a downcomer. 16. A device according to any one of claims 12 to 15, which is intruded.   The antifreezing agent is conveyed against the conveying direction of the conveying means (2) in the first part (12) in the case of the spray tray (14) not swirled, and in the second part (13). The apparatus according to any one of claims 12 to 15, wherein the apparatus is conveyed again in the conveying direction of the conveying means (2).   In the case of the spray pan (14) that is not swirled, the antifreezing agent is transported in the transport direction of the transport means (2) in the first part (12), and transported in the second part (13). 16. Apparatus according to any one of claims 12 to 15, which is conveyed against the conveying direction of the means (2).   18. Device according to any one of claims 12 to 17, wherein the second part (13) is inclined at 60 to 80, preferably 70, with respect to the horizon.

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