JPH0472148B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Application Field] The present invention continuously cools the object by injecting cooling water from the back side of the forward side of each belt with the object to be cooled sandwiched between two endless steel belts, an upper and a lower part, in a sandwich-like manner. In the double belt type cooling machine for solidification, the upper belt cooling water is scooped out and drained.
This invention relates to a device that stores remaining cooling water in the lower part of a belt and reliably drains it using a siphon tube with a suction pump and a siphon tube with a U-trap. [Prior art] In a conventional double-belt type cooling plate so-called double cooler, the width of the upper steel belt is approximately 100 mm wider than the lower steel belt, as shown in Figure 1, and drainage holes are installed at both ends of the upper steel belt. Attach the edge rope,
Cooling water sprayed on the back side of the upper steel belt on the outbound side exchanges heat with the steel belt, then overflows the GV ropes at both ends of the belt, runs along the edge ropes, and is drained into the outer tank at the bottom. . [Problems to be Solved by the Invention] For this reason, a portion of the cooling water may flow to the belt surface side and a small amount of water droplets may be mixed into the material. This occurs because when water droplets attached to the edge rope are bent together with the steel belt at the pulley at the end, the water droplets jump onto the material surface, ie, the surface of the steel belt. Furthermore, since the area between which the object to be cooled is sandwiched in a sandwich-like structure is in an atmosphere of water droplets, a small amount of mist water droplets may adhere thereto. [Means for solving the problem] In a double belt type cooling machine, which is installed almost horizontally in the upper and lower directions, the material is conveyed while being sandwiched between the upper and lower belts on the forward side of both belts, and the desired cooling is performed. A sprinkle trough is installed at a high position on the back side of the upper belt on the outbound side, and a water collection weir is installed at a low position to collect the cooling water flowing down along the back side of the belt. A siphon pipe with a suction pump is installed at the location to drain the cooling water that cannot be collected by the water collection weir, and a U pipe is installed in the middle of this siphon pipe.
Separate siphon pipes with traps are installed, and water is drained through both siphon pipes. In addition, two steel belts are installed vertically opposite each other so that one end is high and the other end is low, and the material is conveyed by sandwiching it on the forward side of both the upper and lower belts to perform the desired cooling. In a belt type cooling machine, sprinkle troughs are provided at a high position and an intermediate position on the back side of the upper belt on the outgoing side, and sprinkler troughs are arranged at adjacent positions slightly above the sprinkle trough at the intermediate position, and at lower positions. There are two upper and lower levels of water collection weirs that collect the cooling water flowing down along the back side, and the cooling water that cannot be collected by the two upper and lower water collection weirs is drained at the lower part of the upper belt. A siphon pipe with a suction pump is provided for this purpose, and a siphon pipe with a U-trap is branched in the middle of this siphon pipe, and water is drained through both siphon pipes. [Example] The present invention will be explained below based on the illustrated example. In the figure, 1 is a steel belt made of stainless steel or the like having the required width and length.The upper belt 1a and the lower belt 1b have the same width, but the overall length is such that the upper belt is shorter and the lower belt is longer. , etc. each steel belt (endless type)
Rollers 2 and 3 are opposed to each other at both ends, and the steel belt 1a or 1b is stretched between these rollers. In this case, as shown in Figure 2A, both belts 1
Both a and 1b may be horizontal, or they may be arranged parallel to each other with one end raised, as shown in FIG. The outgoing side of each of the upper and lower belts 1a, 1b facing each other is driven in the same direction and at the same speed, and the central part of the outgoing side is curved so as to rise slightly upward, and the upper belt is injected onto the back side of the outgoing side. This makes it easier to recover the cooling water. Sprinkle troughs 4 for spraying cooling water evenly in the cross-sectional direction of the belt are provided at one or more required intervals on the back surface of the upper belt 1a on the outbound side. If the steel belt is stretched horizontally as shown in Figure 2A, the belt will be placed at a position slightly raised from the other center of the belt on the outgoing path, and if it is slanted as shown in Figure 2B, the belt will be placed in the outgoing path. Sprinkle troughs 4 are arranged in two stages, upper and lower, at the top and middle of the sides, respectively, and the number of sprinkle troughs to be installed is determined based on the overall length of the steel belt, degree of cooling, belt speed, properties of the object to be cooled, etc. It is something that can be done. The sprinkles are then sprayed from the sprinkle trough 4 against the back surface of the steel belt, flow down the back surface of the belt in a lower direction while exchanging heat on the belt surface, and are placed at a predetermined position and in contact with or close to the back surface of the belt. Water is collected and discharged at the water collection weir 5. Similar to the sprinkle trough, this water collection weir 5 has approximately the same length in the cross-sectional direction of the belt, that is, the belt width direction, and is inserted between the GV ropes provided at both ends of the steel belt, and the water collection weir 5 is connected to the water collection weir with a head difference. It is more natural drainage. A portion of the cooling water that has not been collected and discharged at the water collection weir 5 flows further downward along the belt surface, and eventually accumulates in the lowest part of the steel belt, that is, in the drum. If this water level becomes higher than the GV rope height, it will overflow and water droplets will adhere to the surface of the upper belt or the lower belt, which is not good. Therefore, siphon pipes 6 and 9 are provided at the inner bottom of this drum for draining the cooling water accumulated in the siphon system.
A suction pump 7 is disposed in a part of one of the siphon tubes 6 in the middle of the siphon tube 6,
Drainage water is discharged to a tank etc. through a U-trap 6a formed in a part of the siphon pipe. Driving water is supplied to this suction pump 7 via a water supply valve 8 (or solenoid valve). Negative pressure is generated in the drum, and the cooling water accumulated in the drum is discharged to the outside through the siphon pipe 6 due to the siphon phenomenon. Further, a siphon tube 9 is provided in parallel with the siphon tube 6, and one end of this siphon tube 9 is connected to the starting end of the siphon tube 6, that is, the upstream side of the suction pump, and the other end is connected to allow natural water flow. extends downward to form a U-trap 9a,
Drain into the tank or outside. Therefore, when the water supply valve 8 is opened and driving water is supplied to the suction pump 7, the inside of the siphon pipe 6 becomes negative pressure, and due to this negative pressure, the cooling water accumulated in the drum is drained to the outside through the suction pump. be done. At the same time, since the siphon tubes 6 and 9 are connected in a branched manner, the negative pressure generated in the siphon tube 6 also acts on the other siphon tube 9.
The cooling water in the drum branches through the siphon pipe 6 and also flows into the siphon pipe 9. At this time, since the siphon tube 9 extends downward, the cooling water is discharged from the tube 9 by natural fall. This siphon tube 9 becomes negative pressure just before starting, but since a U-trap 9a is formed at the bottom of this siphon tube 9, cooling water accumulates here, which acts as resistance, and drains from the siphon tube 9 to 6. will not flow backwards. After a while after starting, the siphon tube 6
When the pipe is filled with cooling water, the water inside the pipe flows down into the siphon pipe 9 due to its own weight, and is continuously discharged from the siphon pipe 9 to the outside. In this way, water is drained continuously through the two siphon pipes 6 and 9, and the balance of the amount of water discharged from each pipe can be adjusted by a regulating valve 10 provided below the siphon pipe 9. Note that when the entire conveyor stops, the supply of driving water is also stopped, but cooling water continues to accumulate in the drum for a while, but due to the siphon phenomenon, most of the cooling water is continuously drained even without driving water. Next, there are two cases: when driving water is continuously supplied to the suction pump, and when driving water is intermittently supplied using a solenoid valve instead of a water supply valve (a liquid level switch is combined with the solenoid valve). The suction water amount is shown in the table below.

〔Effect of the invention〕

According to the present invention, when the upper belt cooling water is drained at the water collection weir, a part of the cooling water that cannot be collected at the water collection weir accumulates in the drum, but the suction pump is installed on the upper belt surface. A siphon tube with a This has the advantage of reducing the amount of water driven and increasing the amount of water discharged. Additional relation: Original patent No. 1664296 (Japanese Patent Publication No. 1664296, Japanese Patent Publication No. 3-21829) is for a double belt type cooler in which cooling water from the upper belt is sucked and drained by a suction pump installed in a siphon pipe. In the present invention, a siphon tube with a U-trap is arranged in parallel with a siphon tube with a suction pump, and the amount of driving water for driving the suction pump is reduced and the amount of suction water is increased.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a known double cooler, FIG. 2 is a schematic front view of the present invention, FIG. 3 is a vertical sectional view of the main part, and FIG. 4 is an explanatory diagram of a siphon type drainage. Explanation of symbols 1a... Upper belt, 1b... Lower belt, 2, 3... Roller, 4... Sprinkle trough, 5... Water collection weir, 6... Siphon pipe, 6a... U trap, 7... Suction pump, 8... Water supply valve , 9
...Siphon pipe, 9a...U trap, 10...Adjustment valve.

Claims (1)

[Scope of Claims] 1. In a double belt type cooling machine, which is arranged almost horizontally in the upper and lower belts, the upper and lower belts sandwich and convey the material on the outgoing side surfaces of both the upper and lower belts, and perform the desired cooling. The central part of the outgoing side of the belt is curved in an arched shape so as to bulge upward, and a sprinkle trough is arranged at a high position on the back side of the outgoing side of the upper belt, which is the same width as the lower belt.
A water collection weir is installed at a low position to collect the cooling water flowing down along the back side of the belt, and a water collection weir is installed at a position lower than this water collection weir to drain the cooling water that could not be collected by the water collection weir. A double belt type cooling plate characterized in that a siphon tube with a suction pump is provided, a siphon tube with a U trap is branched in the middle of this siphon tube, and discharge is discharged through both siphon tubes. Upper belt cooling water drainage device. 2. Two steel belts are installed vertically opposite each other so that one end is high and the other end is low, and the material is conveyed by sandwiching it on the forward side of both the upper and lower belts.
In a double belt type cooler that provides the desired cooling,
The center portions of both belts on the outgoing side are bulged upward to form an arched shape, and sprinkle troughs are arranged at high positions and intermediate positions on the back side of the outgoing side of the upper belt, which is the same width as the lower belt, and this There are two upper and lower stages of water collection weirs that collect the cooling water flowing down along the back side of this belt at adjacent and lower positions slightly above and below the sprinkle trough at the intermediate position, respectively. A siphon pipe with a suction pump is provided to drain the cooling water that could not be extracted by the weir at the lower side of the upper belt, and a siphon pipe with a U-trap is branched in the middle of this siphon pipe, and both siphon pipes are disposed of. An upper belt cooling water drainage device for a double belt type cooling plate, characterized in that water is drained through pipes.