JPH0617055B2 - Heat exchange device for long circular objects - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a heat exchange device for cooling or heating a long circular object such as a round shaft and a round pipe.

[Conventional technology and its problems]

Generally, since the temperature of the synthetic resin pipe extruded by the extruder is high, it is cooled by a cooling device and then cut into a predetermined length by a cutting device.

As a conventional technology of a cooling device used for cooling a pipe,
There is the one shown in FIG. This cooling device supplies water from a water supply pipe 12 equipped with a water supply valve 11 into a water tank 13, and causes a pipe A to flow in the stored water of a water tank 13 whose water level is kept constant by an overflow pipe 14 so that the pipe A is brought into contact with water. A is cooled.

By the way, in the above cooling device, since the pipe A is cooled by contact with water in a substantially still state, the cooling efficiency is poor, and a boundary film is formed around the outer periphery of the pipe A.
Due to the formation of the boundary film, there is a disadvantage that the pipe A cannot be effectively cooled because of poor contact with water.

Further, since the cooling efficiency is low, the water tank 13 that is long in the feed direction of the pipe A is required, and there is a disadvantage that the equipment becomes large.

Further, since the stored water is caused to flow, buoyancy is generated in the pipe A, and the buoyancy causes the pipe A to warp or bend, and to seal the inlet 16 and the outlet 17 of the pipe formed in the pair of end plates 15 of the water tank 13. Since it is necessary to provide 18 to prevent water leakage, if the feed of the pipe A is intermittent, water will leak from the seal 18 and the level of the stored water will drop, and the pipe A will be continuously and horizontally transferred. There is also an inconvenience that it is limited to use in some cases.

[Object of the Invention]

Therefore, an object of the present invention is to solve the above-mentioned inconvenience and to provide a small heat exchange device capable of effectively exchanging a long circular object such as a pipe with no adverse effect. .

[Structure of Invention]

In order to achieve the above object, the present invention provides a conical heat exchange chamber inside a heat exchanger body, and forms a cylindrical fluid supply chamber at the large-diameter side end of the heat exchange chamber, A pair of through holes, through which a long circular object can pass with a small margin, are provided concentrically in the heat exchange chamber at each of the end face of the fluid supply chamber and the small diameter side end of the heat exchange chamber. Nozzles for ejecting fluid in the external tangential direction inside the fluid supply chamber are provided around the nozzle.

[Action]

According to the above structure, when the fluid is ejected from the nozzle into the fluid supply chamber, the fluid swirls in the fluid supply chamber and flows into the heat exchange chamber, and a vortex is formed in the heat exchange chamber, resulting in the inner diameter of the passage hole. And a surplus of water flows out through the passage hole.

Therefore, by moving the elongated circular object from one passage hole to the other passage hole, the fluid swirling in the heat exchange chamber comes into contact with the outer periphery of the elongated circular object, so that the elongated circular object is Can be effectively heat-exchanged.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS.

As shown in FIGS. 1 and 2, inside the heat exchanger body 1, a conical heat exchange chamber 2 and a cylindrical fluid supply which is continuous with the large diameter side end of the heat exchange chamber 2 are provided. A chamber 3 is provided, and a pair of passage holes 4 and 4 are provided on the small diameter side end of the heat exchange chamber 2 and the end surface of the fluid supply chamber 3 on the same axis as the heat exchange chamber 2. The inner diameter of the passage hole 4 is slightly larger than the outer diameter of the long circular object A, so that the long circular object A can pass with a slight margin.

A discharge space 5 is provided outside each passage hole 4,
A discharge pipe 6 for discharging a fluid is connected to the discharge space 5.

Further, an insertion hole 7 for the elongated circular object A is provided on the end face of each discharge space 5 on the same axis as the heat exchange chamber 2.

Around the fluid supply chamber 3, a plurality of nozzles 8 for ejecting fluid are provided at equal angles, and the nozzles extend in the tangential direction of the outer periphery of the fluid supply chamber 3 and extend from the nozzle 8 to the inside of the fluid supply chamber 3. When a fluid for heat exchange is jetted to the fluid, the fluid swirls in the fluid supply chamber 3.

The heat exchange device shown in the embodiment has the above structure, and when using this heat exchange device, for example, when cooling a pipe after extrusion molding, cooling water is continuously supplied to each nozzle 8,
Of the pair of insertion holes 7, the pipe A is fed from one insertion hole 7 toward the other insertion hole 7.

When cooling water is supplied to each nozzle 8, the cooling water is jetted in the external tangential direction in the fluid supply chamber 3, so that the nozzle 8 swirls in the fluid supply chamber 3 and heat exchange continues to the fluid supply chamber 3. It flows into the chamber 2 and turns. By the swirling, a cavity is formed in the center of the cooling water, and when the inner diameter of the cavity becomes smaller than the inner diameter of the passage hole 4, the cooling water flows into the discharge space 5 from the passage hole 4 and is discharged from the discharge pipe 6. To be done.

When the pipe A is inserted through the insertion hole 7 in the cooling water supply state as described above, when the pipe A moves in the fluid supply chamber 3 and the heat exchange chamber 2, the inner diameter of the cooling water cavity The part contacts the pipe A, and the pipe A is cooled by the contact with the cooling water. At this time, since the cooling water is swirling, no boundary film is formed on the outer circumference of the pipe A, and the contact between the cooling water and the pipe A is good, so that the pipe A is cooled very effectively. At the same time, since the pipe A moves in the swirling cooling water cavity, the pipe A is not affected by buoyancy, and as a result,
The pipe A can be cooled without being deformed.

As shown in FIG. 3, if the sleeves 9 having different inner diameters are detachably attached to the passage holes 4, the pipe A having an arbitrary diameter can be cooled. In this case, the sleeve 9 may be attached to only one passage hole 4 or may be attached to both passage holes 4.

In the case of the embodiment, the cooling of the pipe A has been described as an example, but the heat exchange object is not limited to the pipe A and may be, for example, a solid shaft. Further, by supplying a high temperature fluid instead of the cooling water to the fluid supply chamber 3, it is possible to heat a long circular object such as the pipe A.

In the heat exchange device according to the present invention, since the fluid for heat exchange is swirled in the fluid supply chamber 3 and the heat exchange chamber 2, even if the passage holes 4 are arranged vertically, The fluid swirling in the heat exchange chamber 2 does not leak to the outside. Therefore, in addition to the use of the horizontal arrangement as shown in the drawing, it may be used as a vertical arrangement in which the pair of passage holes 4 are vertically arranged. it can.

〔effect〕

As described above, in the present invention, the fluid for heat exchange is swirled in the heat exchange chamber and the fluid supply chamber, and the long circular object is passed through the cavity formed in the center of the swirling fluid. Good contact between the long circular object and the liquid allows the long circular object to be heat-exchanged very effectively, and the device can be downsized.

Further, since the long circular object is moved to the hollow portion at the center of the fluid that swirls and flows, heat exchange processing can be performed without being affected by buoyancy and without deforming the long circular object.

Further, when the inner diameter of the central cavity of the swirling fluid becomes smaller than the inner diameter of the passage hole, the fluid flows out from the passage hole, and a constant amount of fluid can be constantly held in the heat exchange chamber and the fluid supply chamber. Even when the long circular object is intermittently supplied, the long circular object can be heat-exchanged, and the apparatus can be used in both horizontal and vertical orientations.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view showing an embodiment of a heat exchange device according to the present invention, FIG. 2 is a vertical sectional side view of the same, and FIG. 3 is a vertical sectional front view showing another embodiment of the same. The figure is a vertical sectional front view showing a conventional heat exchange device. 1 ... Heat exchanger body, 2 ... Heat exchange chamber, 3 ... Fluid supply chamber, 4 ... Passage hole.

Claims (1)

[Claims] 1. A conical heat exchange chamber is provided inside a heat exchanger body, and a cylindrical fluid supply chamber is formed at an end portion of the heat exchange chamber on the large diameter side. A pair of through holes, through which a long circular object can pass with a small margin, are concentrically provided in the heat exchange chamber at each of the small diameter side end portions of the exchange chamber, and the fluid supply chamber is provided around the fluid supply chamber. Heat exchange device for a long circular object provided with a nozzle for ejecting a fluid in the external tangential direction.