JPH0518693A - Removing device for cleaning ball - Google Patents

Abstract

PURPOSE:To obtain a removing device for cleaning balls, simple in structure, easy in manufacturing, slight in the resistance of fluid, capable of removing the cleaning balls economically, easy in cleaning and capable of effecting the cleaning surely. CONSTITUTION:The removing device for cleaning balls is constituted of a semi- elliptic screen 2, fixed pivotally in a cylindrical casing 1 and whose semi-elliptic peripheral rim is contacted with the inner surface of the casing. Cleaning balls, floating on fluid flowing through the casing 1, are retained by the screen 2 and are removed out of the casing 1. The side wall of a receiving box 3 for collecting the cleaning balls is fixed to the inner surface of the casing 1 while the bottom plate of the receiving box 3 is fixed to the downstream end of the semi-elliptic peripheral rim of the screen 2 so that the receiving box 3 is formed by the pivoting of the screen 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning sphere take-out device.

[0002]

2. Description of the Related Art In a tube type heat exchanger used as a condenser of a power plant, a liquid is caused to flow in the tube to exchange heat with another fluid flowing outside the tube. At this time, the impurities contained in the liquid flowing in the tube gradually adhere to the inner surface of the tube, thereby lowering the efficiency of heat exchange. Therefore, in order to remove impurities adhering to the inner surface of the tube, a cleaning sphere is suspended in the liquid and allowed to flow in the tube. For this reason, the spheres suspended in the liquid must be collected and reused before discarding the liquid. For this reason, it is necessary to remove the cleaning sphere from the liquid while continuously flowing the liquid. This is the device for removing the cleaning sphere.

The cleaning sphere take-out device is designed to separate a sphere from a liquid by passing a sphere-containing liquid through a screen in a cylindrical casing, collect the separated sphere in a receiving box, and take out the sphere from an outlet. It is based on the principle. At this time, the take-out device must completely separate the spheres from the liquid, discharge the separated spheres from the take-out port without retaining them, and make the resistance to the fluid as small as possible.

On the other hand, the fluid flown into the above-mentioned take-out device is
Since it is used only for heat exchange,
A fluid containing foreign matter such as dust is often used as it is. Therefore, the foreign matter contained therein is
May clog the screen. For example, when seawater is used as it is, seaweed contained in the seawater clogs the screen or the like. Therefore, it is necessary to occasionally clean the screen and the receiving box.

The above-mentioned cleaning cannot be performed by stopping the flow of liquid. That is, the screen must be cleaned while the liquid is still flowing. Therefore, the screen is made rotatable in the casing, and for cleaning, the liquid is made to flow from the rear surface of the screen to wash away dust and the like caught on the screen surface from the screen. At that time, it was also necessary to wash away dust and the like caught in the sphere box at the same time.

As a cleaning sphere take-out device, various structures have been proposed, but the sphere can be taken out smoothly,
I can't find anything that has low flow resistance and is easy to clean.

Japanese Examined Patent Publication No. 59-26240 discloses that two semi-elliptical screens can be separately swung in a casing, and the straight edges of the semi-elliptical screens are brought into contact with each other, and the semi-elliptical edges are Disclosed is a device in which the cleaning sphere is stopped by a screen in contact with the inner surface of the casing. In this device, the contact parts of the straight edges of the two screens are located on the downstream side of the liquid flowing in the casing to form a valley in the contact part, and the trough is provided at the bottom of the valley to incline the trough in the longitudinal direction. , The spheres are collected on the inclined bottom of the gutter and taken out from the casing. However, this mechanism requires that a gutter extending in the diametrical direction be provided in the casing, so that the fluid receives a large resistance due to the gutter, and thus the pressure loss of the fluid increases and the flow of the fluid is not smooth. was there. In addition, there is a drawback that it is difficult to attach a gutter and it is not easy to implement.

Further, Japanese Patent Publication No. 60-8440 also discloses a sphere take-out device similar to the above-mentioned publication. The device allows two semi-elliptical screens to be swiveled separately in a cylindrical casing, with the straight edges of the semi-elliptical screen touching each other and the semi-elliptical edges touching the inner surface of the casing. The device is the same as the above-mentioned device in that the cleaning sphere is stopped on the screen. However, in this device, the contact portions of the straight edges of the two screens are located on the upstream side of the fluid flowing in the casing so that the screens have a roof shape, and the cleaning spheres are collected on the semi-elliptical edges of the screens. I have decided.

However, this device uses a very complicated mechanism to collect the spheres. That is, the spheres collected between the screen and the casing are put into a connecting conduit fixed to the screen, flow through the connecting conduit, jump over the screen, and then pass through the conduit fixed to the casing to the outside of the casing. I'm trying to get out. But,
This makes it difficult to fabricate the device because it is difficult to fix the conduit to the screen and casing, and it is difficult to remove the adhering foreign matter, which is not easy to clean, and the fluid resistance is high. There was a flaw.

[0010]

SUMMARY OF THE INVENTION The present invention has been made in an effort to provide a cleaning sphere take-out device which does not have the above-mentioned drawbacks. That is, the present invention provides a cleaning sphere that has a simple structure, is easy to manufacture, has a low fluid resistance, can economically take out the sphere, and can easily and reliably clean the screen. It was made in an attempt to provide a take-out device.

[0011]

SUMMARY OF THE INVENTION The present invention allows two semi-elliptical screens to be separately swiveled within a cylindrical casing, with the straight edges of the semi-elliptical screen positioned upstream of the fluid flow. The arrangement of the two screens in a roof shape is the same as the device of Japanese Patent Publication No. 60-8440. This invention forms a cleaning sphere receiving box between the tip of the semi-elliptical edge of the screen and the inner surface of the casing, fixes the side wall of the receiving box to the casing side, and fixes the bottom of the receiving box to the screen side. The receiving box can be disassembled to facilitate cleaning. Further, the outlet of the cleaning sphere is provided on the casing wall facing the receiving box to reduce the fluid resistance and simplify the structure of the extracting device.

[0012]

SUMMARY OF THE INVENTION According to the present invention, a casing that allows a fluid to flow in an axial direction, two semi-elliptical screens that are rotatably fixed in the casing, and the screens have their semi-elliptical peripheral edges contacting the inner surface of the casing. At this time, in a cleaning sphere take-out device including a cleaning sphere receiving box formed at the end of the screen on the downstream side of the screen, and a sphere taking-out port provided in the casing wall connected to the receiving box, the receiving box is provided with a side wall. It is divided into a part and a bottom plate part, the side wall part is fixed on the inner surface of the casing, while the bottom plate part is fixed to the screen, and the side wall part is made into a tunnel shape in which the upstream of the fluid extends from the sphere outlet to the case. Formed so that the upstream edge of the tunnel can contact the downstream edge of the screen, and the bottom plate portion is separated from the screen by the support rod protruding from the downstream edge of the screen. Fixed, the bottom plate portion is characterized in that so as to constitute a receiving box by closing the opening I downstream of the tunnel, there is provided a take-off of the cleaning balls.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of the embodiment of the cleaning sphere take-out device according to the present invention will be described below with reference to the drawings. FIG. 1 is a vertical cross-sectional view of the device according to the present invention, in which the cut surface passes through the axis of the casing,
It is a plane perpendicular to the axis of rotation that supports the screen.
2 is a vertical cross-sectional view of the apparatus of FIG. 1, in which case the cutting plane is a plane that passes through the axis of the arrow casing but is perpendicular to the cutting plane of FIG. FIG. 3 is a partially cutaway perspective view of the device according to the present invention when the screen is opened.

In FIGS. 1 to 3, 1 is a cylindrical casing, and 2 is a semi-elliptical screen. The casing 1 is provided with flanges 11 at both ends, and is used by being inserted between the water pipes a and b for flowing the cooling water in the direction of the arrow X.

The screen 2 is constructed by extending a plurality of narrow elongated members 22 in a substantially semi-elliptical frame 21 in parallel with each other at equal intervals. as a result,
The cooling water can pass through the screen 2, but the cleaning sphere cannot pass through the screen 2 and will be stopped.

The two screens 2 are both mounted on a rotary shaft 23 that extends perpendicularly to the direction of the arrow X in the casing 1, are rotatable about the rotary shaft 23, and are arranged symmetrically with respect to each other. Has been done. Further, in each of the two screens 2, an edge 24 corresponding to the short axis of the semi-ellipse is extended in the diametrical direction of the casing 1 so that the upstream edge is located at the upstream edge, and the edge of the edge corresponding to the long axis of the semi-ellipse. 25 is located downstream. When the cleaning sphere is taken out, the screen 2 is located at the position shown by the solid line in FIG. 1 so that the straight edges 24 are in contact with each other and the semi-elliptical edges are in contact with the inner surface of the casing. Arrangement is such that the screens 2 cooperate to block the passages in the casing 1.

An outlet 12 for the cleaning sphere is provided on the inner surface of the casing 1 near the edge 25 of the screen 2. Further, a receiving box 3 of a cleaning sphere is formed around the outlet 12.

The receiving box 3 is divided into a side wall portion and a bottom plate portion. Then, the side wall portion becomes a portion where the casing 1 is fixed to the crocodile and cannot move, and the bottom plate portion becomes the portion where the screen 2 is fixed and movable.

As shown in FIG. 3, the side wall portions are vertically long walls 31 and 32 standing upright from the portion 13 of the casing 1, and
It is a tunnel-shaped wall composed of a trapezoidal wall 33 located between them. The tunnel forming the side wall portion extends from the outlet 12 toward the upstream side of the fluid, and opens the end of the upstream side toward the upstream side of the fluid.

The screen 2 is rotatable as described above, and its elliptical periphery can contact the inner surface of the casing 1. At the time of this contact, the peripheral edge of the downstream edge of the screen 2 is made to be able to exactly contact the upstream edge of the edge portion of the side wall portion. In this way, the screen 2 can stop the cleaning sphere floating in the fluid and moving in the casing 1.

On the bottom plate portion 27 of the receiving box 3, the screen 2 is fixed to the crocodile, as shown in FIG. That is,
Two support rods 26 from the edge 25 of the downstream of the screen 2
And the screen 2 is fixed to the alligator by the support rod 26. Therefore, there is a gap between the bottom plate portion 27 and the screen 2.

When collecting cleaning spheres, the screen 2
Becomes the state shown by the solid line in FIG. 1, and hence the state shown in FIG. At this time, the downstream edge 25 of the screen 2 comes into contact with the edge of the upstream opening of the side wall portions 31 to 33 fixed to the inner surface of the casing 1. At this time, the bottom plate portion 27 supported by the support rod 26 closes the downstream opening of the side wall portions 31-33. Therefore, the cleaning sphere Y that has floated in the fluid is stopped by the screen 2, falls along the screen 2, and is collected in the receiving box 3.

The downstream edge 25 of the screen 2 has a third
As shown in the figure, it is desirable to have a notch in a U shape. In addition, in the side wall portion, it is desirable that the upstream end of the vertical walls 31 and 32 be inclined along the inclination of the screen 2. In this way, as the cleaning sphere falls along the screen 2, it can enter the receiving box 3 without any damage.

Further, it is desirable that the shape of the receiving box 3 is such that the width becomes narrower toward the downstream side in the peripheral direction of the casing, while the upstream side and the downstream side have the same height in the diametrical direction of the casing. Further, it is preferable that the vertically long walls 31 and 32 and the trapezoidal wall 33 are constituted by plates having small holes so that the spherical body Y cannot pass through.

In order to smoothly rotate the screen 2 inside the casing 1, projecting walls 15 are attached to both ends of the rotary shaft 23. However, the protruding wall 15 is also attached to the conventional device. In the present invention, the protruding wall 15 is attached as in the conventional device.

[0026]

As described above, in the apparatus according to the present invention, when the cleaning sphere is taken out, the peripheral edge of the downstream edge of the screen 2 is brought into contact with the inner surface of the casing as described above, and the bottom plate portion 27 is brought into contact with the side wall portions 31-33. The contact box 3 is formed by making it contact. Therefore, according to this apparatus, the cleaning spheres can be stopped by the screen 2, collected in the receiving box 3, and then taken out from the outlet 12, so that the spheres can be taken out easily and surely.

After the cleaning sphere is taken out, the take-out device itself is cleaned in order to remove foreign matters attached to the take-out device. The foreign matter mainly adheres to the upstream surface of the screen 2 and the inner surface of the receiving box 3. Therefore, the screen 2 is rotated to the position shown by the dotted line in FIG. 1 to flow the fluid. Then, in the receiving box 3, as shown in FIG. 3, the bottom plate portion 27 is separated from the side wall portion and becomes bottomless, so that the fluid passes through the side wall portion easily, and thus foreign matter can be easily and easily removed from the side wall portion. Can be reliably removed. On the other hand, the screen 2 receives the fluid from the opposite direction from when the cleaning sphere was stopped, so that the foreign matter retained therein can be easily and surely removed. Further, since the screen 2 is fixed to the bottom plate portion 27 by the crocodile support rods 26, the foreign matters adhering to the bottom plate portion 27 are washed by the fluid passing between the support rods 26, so that it is easy to perform. In addition, it is possible to reliably remove the foreign matter. Therefore, this device can easily and reliably remove foreign matter.

In the apparatus according to the present invention, the sphere take-out port 12 is attached on the casing side, and the tunnel side wall portions 31-33 are fixed in the vicinity thereof to form the necessary portion of the receiving box 3. You can On the other hand, on the screen side, the support bar 26 is provided at the end of the downstream side of the screen so as to project, and the bottom plate portion 27 is fixed at the tip of the support rod 26. Therefore, this device has a simple structure and is easy to manufacture.

Further, in the apparatus according to the present invention, the receiving box 3 is formed in contact with the inner surface of the casing 1, and the receiving box 3 is formed only at the diametrically opposed local portions. Even when constructed, the fluid resistance is low and therefore the cleaning sphere can be taken out economically.

Therefore, the device according to the present invention has a simple structure and is easy to manufacture, has a low resistance to fluid, can easily and reliably take out the cleaning sphere economically, and further can clean the screen. Also offers the advantage of being easy and reliable.

[Brief description of drawings]

1 and 2 are both vertical cross-sectional views of the cleaning sphere take-out device according to the present invention. In FIG. 1, the cut surface is perpendicular to the rotation axis that supports the screen by passing through the axis of the casing. FIG. 2 is a cross-sectional view when the cut surface is a flat surface, and FIG. 2 is a cross-sectional view when the cut surface is a plane perpendicular to the cut surface of FIG. 1 through the axis of the casing. FIG. 3 is a partially cutaway perspective view of the device according to the present invention when the screen is opened.

In the figure, 1 is a casing, 2 is a screen, 3 is a receiving box, 12 is a spherical outlet, 31-33 is a side wall of the receiving box, 27 is a bottom plate of the receiving box, and 26 is a supporting rod.

Claims (1)

Claim: What is claimed is: 1. A cylindrical casing for allowing a fluid to flow in an axial direction, two semi-elliptical screens fixed to the casing so as to be rotatable, and the screens having their semi-elliptical peripheral edges. In a device for taking out a cleaning sphere, which comprises a cleaning sphere receiving box formed at the end of the screen on the downstream side of the screen when brought into contact with the inner surface, and a sphere taking-out port provided in the casing wall connected to the receiving box. , The receiving box is divided into the side wall part and the bottom plate part, and the side wall part is fixed on the inner surface of the casing.
On the other hand, the bottom plate part is fixed to the screen, the side wall part is formed into a tunnel shape in which the upstream of the fluid extends toward the sample from the sphere outlet, and the upstream edge of the tunnel is located at the downstream end of the screen. So that the bottom plate portion is fixed away from the screen by a supporting rod that projects downstream from the end of the screen so that the bottom plate portion forms the receiving box by closing the opening of the tunnel at the downstream part of the tunnel. A device for taking out a cleaning sphere, which is characterized in that