JPH04288495A - Washing body collector for tube type heat exchanger - Google Patents

Abstract

PURPOSE:To provide a washing body collector, collecting washing bodies such as sponge balls or the like for a tube type heat exchanger stably, never blockading the outlet port of the washing bodies even when a plenty of foreign materials are conducted and available of a high washing body recovery rate. CONSTITUTION:The title collector is constituted of a flow regulating member 5, formed along a center line dividing a cooling water flow passage into two divisions substantially, flow regulating vanes 6, provided at the end of the downstream side of the flow regulating member 5, lattice steps 12 as well as projecting members 13, provided on collecting lattices 2 positioned so as to be opposed to the flow regulating vanes 6, and ducts, opposed to the inner walls of the cooling water passage of the direction opposed to each other, slanted toward the upstream direction and opened so as to be widened toward the upstream of the cooling water.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention is for use in tubular heat exchangers for cleaning the inside of the heat transfer tubes of a heat exchanger by putting a cleaning body such as a sponge ball into cooling water, and then collecting the cleaning body. The present invention relates to a cleaning body collection device.

0002

[Prior Art] A conventional device is disclosed in Japanese Patent Application Laid-Open No. 58-18641.
As described in Publication No. 1, the lower part of the collection grid is used as a collection container, and a guide member is provided in the range of the obliquely extending end wall of the collection container, and the width of this guide member is narrower than the interval A between the side walls of the collection container. A filter device is known which is configured to face the outlet of the cleaning member and to separate the cleaning member from the cooling water flow. However, this known technology has the disadvantage of stably collecting the cleaning member against drifting flow from the upstream side, and temporarily collecting a large amount of foreign matter from the upstream side (for example, objects falling from the cooling water outflow wall surface). ), etc., causing a problem in that the cleaning member outlet, which opens toward the upstream side, is blocked.

On the other hand, as described in Japanese Utility Model Application Publication No. 62-192098, the cleaning body collected at the downstream end of the grid is sucked upstream, and the cleaning body extraction tube is inserted into the space narrowed by the collection grid. A cleaning body collection device that is installed is known.

However, this known technique does not take into consideration the point of stably collecting the cleaning body against drifting flow from the upstream side and temporary high flow velocity.

[0005]

[Problems to be Solved by the Invention] The above-mentioned conventional technology has the following points: It is possible to stably collect the cleaning body against drifting flow from the upstream side and temporarily high flow velocity, and it is possible to collect the cleaning body in a stable manner even when a large amount of foreign matter, etc. is temporarily collected from the upstream side. No sufficient consideration has been given to the fact that the cleaning body outlet is clogged due to the inflow of the cleaning body, and there has been a problem in that the cleaning body recovery performance (cleaning body recovery rate) is reduced.

The object of the present invention is to provide a pipe heat exchanger for use in a tubular heat exchanger that can stably collect the cleaning body, do not block the cleaning body outlet even when a large amount of foreign matter flows in, and can obtain a high cleaning body recovery rate. An object of the present invention is to provide a cleaning body collection device.

[0007]

[Means for solving the problem] In order to stably collect the cleaning body against the above-mentioned uneven flow on the upstream side, a space between the collection grids is provided along the center which roughly bisects the cooling water flow path. A rectifying member is installed.

[0008] Furthermore, in order to prevent the outlet of the cleaning body from being blocked due to a large amount of foreign matter temporarily flowing in from the upstream side, a rectifying part vane is provided at the lower end of the rectifying member, and the cleaning body is A cleaning body extraction pipe is installed on the upstream side.

Furthermore, in order to prevent large flat shellfish from slipping through the gap between the vane and the grid and clogging the inside of the duct or the outlet of the cleaning body, reducing the collection rate, a part of the collection grid facing the vane is provided. A plurality of lattice steps and protruding members are arranged in parallel.

0010

[Operation] The rectifying member functions to rectify the flow line on the inlet side of the cleaning body collecting body against the drifting flow from the upstream side. As a result, the cleaning body flows into the collection body along the rectified streamlines, so the component flowing at right angles to the collection grid surface becomes smaller, causing the cleaning body to adhere to the collection grid surface and stagnate. can be prevented from happening.

[0011] The cleaning body extraction pipe that sucks up the cleaning body upstream has an outlet facing the downstream side, so even if a large amount of foreign matter temporarily flows in from the upstream side, the foreign matter will be trapped along the main flow. Captured by the collection grid. Thereby, only the cleaning body can be sucked up at the cleaning body outlet.

[0012] Furthermore, the rectifier vane provided at the lower end of the rectifier member is installed with an appropriate spacing between it and the collection grid, which is larger than the spherical diameter of the cleaning body, and the part of the collection grid opposite to this vane is Grid steps and protruding members are provided. As a result, large inflow foreign particles are captured between the rectifier vanes and the collection grid, and only the cleaning material flows into the duct and is sucked up by the cleaning material extraction pipe, so that the outlet is not blocked.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 8. In these figures, the cleaning body collecting device mainly includes a body 1, a collection grid 2, a duct 3, a cleaning body extraction pipe 4, a rectifying member 5, a rectifying vane 6, and the like. The body 1 has flanges at both ends so that it can be connected to cooling water piping from a condenser (not shown). fuselage 1
A cleaning body extraction pipe 4 is installed in the center of the body in the axial direction, and a flange is attached to the outer end of the body to connect to a cleaning body circulation system (not shown). The inner end of the body opens toward the downstream side of the cooling water, and serves as a cleaning body outlet 7 facing a duct 3 formed by a pair of collection gratings that will be described later.

The duct 3 has a substantially flat plate-like cross section, and its opening faces the upstream side of the cooling water, and has a valley shape with the lowest point at the center of the fuselage, and has a bottom end. is a flat plate facing the washer outlet 7 at the inner end of the body of the washer extracting tube 4. The width of the duct 3 and the inner diameter of the cleaning body extraction pipe 4 are both similar to the cleaning body S like a sponge ball.
It is sized so that it can be easily passed through.

[0015] The collection grid 2 has a large number of rods arranged side by side at appropriate intervals along the flow direction of the cooling water, connected to the duct 3 at the lower end, and arranged symmetrically on the upstream side of the flow. . These rods extend upstream from the duct 3 at the cleaning body collecting position, and are inclined at an appropriate angle so as to form a V-shape with the opposing collection gratings 2, 2. The upper end portion is adapted to substantially touch the inner wall portion of the body 1. Further, a collection grid shaft 8 is fixedly attached to the collection grid 2, and one end of the collection shaft 8 projects toward the outside of the body 1 and is connected to a collection grid handle 9. Therefore, by operating the handle 9, the collection grid 2 can be swung. When collecting the cleaning body, the collecting grids 2, 2 are made in a V-shape, and when not collecting, they are made in a V-shape (dotted chain line). A vertical flat plate 10 is provided close to the side edge of the collection grid 2.

The rectifying member 5 is formed along the center which roughly bisects the cooling water flow path in the space sandwiched between the collecting grids 2, 2, and is connected to the cleaning body extraction pipe 4 at the center of the body 1, and is connected to the cleaning body extraction pipe 4 at the center of the body 1. The end is connected to a vertical flat plate 10. Therefore, against the drift from the upstream side, the rectifier plate 5 acts to straighten the streamlines on the inlet side of the cleaning body collecting body, and the vertical component of the cooling water streamlines with respect to the 2 surfaces of the collecting grid becomes small, so that the cleaning body It can prevent adhesion to the collection grid surface and stagnation.

On the other hand, a rectifying vane 6 is provided at the downstream end of the rectifying member 5, and is spaced apart from the duct 3 so that the cleaning body S can easily roll within the duct 3, with the center part being the lowest end. The lowermost end of the pipe is connected to the washer outlet 7 at the inner end of the body of the washer extraction pipe 4. Therefore, the vanes 6 disturb the flow on the collection grid surface and in the duct 3, and it is possible to prevent the cleaning body from adhering to the grid or stagnating in the duct. In addition, the cleaning extraction pipe 4 that sucks up the cleaning body upstream has an outlet facing the downstream side, so even if a large amount of foreign matter temporarily flows in from the upstream side, the foreign matter will be collected along the main flow. Only the washed body is captured by the grid 2 and sucked up by the extraction tube 4.

Further, the rectifying vane 6 provided at the lower end of the rectifying member 5 is installed with an appropriate spacing between it and the collection grid 2, which is larger than the spherical diameter of the cleaning body, and is opposite to the collecting grid 2. A grid step 12 and a projection member 13 are provided in the collection grid portion. As a result, large inflow foreign particles are captured between the rectifying vanes 6 and the collection grid 2, and the cleaning body S
Only the liquid flows into the duct 3 and is sucked up by the cleaning body extraction pipe 4, so that the outlet 7 is not blocked. In particular, when a large flat shellfish tries to slip through the gap between the vane 6 and the lattice 2, the lattice step 12 and the protruding member 13 work to raise the large and flat shellfish and prevent it from slipping through. It will be caught in between.

This action will be explained in more detail with reference to FIGS. 6 to 8. As shown in FIG. 6, the protruding members 13 are juxtaposed on the grid 2 at approximately the same intervals as the gap between the rectifier vane 6 and the collection grid 2.
It is designed to prevent small foreign objects and cleaning materials from being trapped or stagnant.

As shown in FIG. 7, when a large, flat shell K tries to slip through the gap between the vane 6 and the grid 2 while sliding on the lattice 2 surface, in the present invention, the shell K wakes up a little. Furthermore, the shellfish K is raised up by the flow of cooling water and the protrusion member 13 provided on the surface of the lattice 2, and is finally caught between the vane 6 and the lattice 2.

As shown in FIG. 8, the same effect can be obtained by providing protruding members 13 instead of the lattice steps.

[0022]

[Effects of the Invention] According to the present invention, the streamlines on the body inlet side can be rectified against the drifting flow from the upstream side.
The vertical component with respect to the collection grid surface becomes small, and high recovery performance (high recovery rate) can be obtained without the cleaning body adhering to or stagnation on the collection grid surface.

[0023] Furthermore, since a rectifying vane is provided at the lower end of the rectifying member and the cleaning body is sucked up to the upstream side, even if a large amount of foreign matter etc. temporarily flows in from the upstream side, the cleaning body outlet is not blocked. can be prevented.

Furthermore, since the grid steps and protrusions are provided in the collection grid portion facing the rectifying vanes, it is possible to prevent large flat shellfish from slipping through the gap between the vanes and the grid and clogging the inside of the duct or the outlet of the cleaning body. Therefore, high recovery performance of the cleaning body can be expected regardless of the inflow of foreign matter.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing one embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG. 1.

FIG. 3 is a sectional view taken along line III-III in FIG. 1;

FIG. 4 is a sectional view taken along line IV-IV in FIG. 1;

FIG. 5 is a partially cutaway perspective view of FIG. 1;

FIG. 6 is a partially enlarged perspective view of the duct in FIG. 1;

FIG. 7 is an explanatory diagram showing the effect of FIG. 6;

FIG. 8 is an explanatory diagram of the function of the duct portion showing another embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1... Body, 2... Collection grid, 3... Duct, 4... Cleaning body extraction pipe, 5... Rectifying member, 6... Rectifier vane, 7... Cleaning body outlet, 8... Collection grid shaft, 9... Handle, 10...Vertical flat plate,
12... Lattice step, 13... Projection member.

Claims (3)

[Claims] Claims: 1. A collection grid provided in a cooling water flow path to collect the cleaning material that has been introduced into the cooling water and washed inside the heat exchanger tubes of a heat exchanger, and a collection grid that is collected by the collection grid. A cleaning body collection device for a tubular heat exchanger, comprising a cleaning body extraction pipe for extracting the cleaned body out of the cooling water flow path,
a rectifying member formed along a center line that substantially bisects the cooling water flow path, a rectifying vane provided at a downstream end of the rectifying member, and the collection grid located at a position opposite to the rectifying vane. The lattice step and protrusion member provided in the section are kept at an appropriate distance from the rectifier vane, and are moved upstream toward the inner wall of the cooling water channel in opposite directions with the extraction pipe opening installation location as the lowest point. 1. A cleaning body collection device for a tubular heat exchanger, characterized by comprising a duct having an inclined scent profile and having a wide opening toward the upstream side of cooling water. 2. In claim 1, the collection grid is in contact with the duct and has a large number of rods arranged side by side at appropriate intervals so as to extend at an angle to expand toward the upstream side, A cleaning body collection device for a tubular heat exchanger, which is a pair of collection grates that are swingably supported in a cooling water flow path while facing each other while maintaining an appropriate gap with the rectifier vane. 3. In claim 1, the protrusion member provided on the collection grid is a cleaning body for a tubular heat exchanger that is juxtaposed with a distance close to the spacing between the rectifier vane and the collection grid. Collection device.