JPS6064197A - Washing body collecting device - Google Patents

Abstract

PURPOSE:To improve collecting efficiency by a method wherein the device is constituted of one pairs of collecting lattices, opposing mutually to the path of cooling water in a cylinder and supported pivotally respectively, a washing body extracting pipe, a covering plate and a turbulent flow generating plate. CONSTITUTION:Cooling water, containing the washing bodies which have finished washing of the inside of heat transfer tubes for a condenser, flows from the upper end of the cylinder 21 into the cooling water paths 23a, 23b while the washing bodies drop into the washing body path 25 under rooling on the first lattice 22a and the second lattice 22b and are collected after being discharged to the outside through the washing body extracting pipe 24. On the other hand, in case the size of foreign material, mixed in the cooling water, is larger than the gap between the lattices 22a, 22b, a part of it rolls on the lattices 22a, 22b and is collected. Turbulent flow B is generated in the cooling water A flowed into the cylinder by the turbulent flow generating plate 33 and a part of the foreign materials and the washing bodies flows down toward the washing body path 25 under flowing between the turbulent flow generating plate 33 and a connecting section 22c. Further, the covering plate 26 is provided above the washing body path 25, therefore, the washing bodies and foreign materials flow down into the washing body path 25 under being attracted into the turbulent flow generating zone of the covering plate 26 and are collected at the outside of the device. According to this method, the collecting lattice may be prevented from adhesion of foreign materials and the collecting efficiency may be improved.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention is a cleaning body collecting device mainly used for a tube heat exchanger, that is, a cleaning body such as a sponge ball is put into cooling water, and the cleaning body is This relates to a device that collects the cleaned body after cleaning the inside of a heat transfer tube.

[Background of the invention]

Generally, when cleaning heat exchanger tubes, for example heat exchanger tubes built into a condenser, a sponge ball is thrown into the cooling water in the inlet tube as a cleaning body, and the sponge ball comes into contact with the heat exchanger tube while passing through it. At this time, water scale and foreign matter adhering to the pipe are removed and discharged into the outflow pipe, and the sponge balls discharged into the outflow pipe are extracted and collected by a fruit thinning device installed in the outflow pipe. .

The conventional cleaning body collection device as described above is shown in Figs. 1 and 2.
As shown in the figure, a pair of upstream gratings 1 provided at the upper part of the body 5, a pair of downstream gratings 2 provided below the upstream gratings 1, and a cleaning body extractor connected to the lower part of the downstream gratings 2. to the pipe 3 and the pressure ejection pipe 4 provided below this extraction pipe 3↓
It is composed of many things.

The pair of upstream grids 1 are arranged opposite to each other, and the handle 7
The shafts 6 are respectively attached to each shaft 6, which is rotated by a large number of rotations.

Each of the upstream gratings 1 has a large number of rods 1a arranged at appropriate intervals in the diametrical direction of the body 5, and has 7 rods 1a arranged toward the upstream side.
It is arranged and configured so that it expands into a letter shape. The upper end of each of the rods 1a contacts the inner wall of the body 5, and the lower end thereof is formed into a rectangular passage IA that is elongated along with the inner wall of the body in the diametrical direction of the body 5 and has a width through which the cleaning body can easily pass. .

The pair of downstream gratings 2 are formed in a rectangular shape as a whole with a pair of vertical flat plates 8 disposed opposite to each other so as to sandwich them. The shafts 6 are respectively attached to each shaft 6, which is rotated by a large number of rotations. The upper part of the funnel-shaped passage 9 formed by the pair of downstream gratings 2 and the vertical flat plate 8 faces the rectangular passage IA of the upstream grating 1, and the lower two rectangular passages of the said funnel-shaped passage 9 are connected to the cleaning body. It is connected to one end of the extraction tube 3. The other end of the cleaning body extraction pipe 3 projects outside the body 5 and is connected to a cleaning body circulation pipe (not shown). Further, the pressure water jetting pipe 4 is pushed into the body 5 below the cleaning body extraction pipe 3 and perpendicular thereto, and the pipe end on the body side is closed, and the pressure water jetting pipe inside the body 5 is A plurality of holes are bored in the upper part of 4.

In the conventional example having the above-described structure, the passage of the cleaning body is narrowed from the cross section of the body 5 into an elongated rectangle including the diameter of the body 5 by a pair of upstream gratings 1, and further narrowed by a pair of downstream gratings 1 and a vertical flat plate 8. Since the cooling water is narrowed down to two rectangular passages with one side having the diameter of the cleaning body extraction pipe 3 through the funnel-shaped passage 9, the cleaning body of the cooling water can be collected reliably. Furthermore, since the sub-gratings 1 and 2 are rotatably provided by operating the handle 7, 10, it is possible to easily remove foreign matter that has been caught or fallen into the cleaning body passage. Furthermore, by spouting pressure water from the pressure water jet 14,
It is possible to shock and disturb the cooling water passing through each grid 1.2 to further improve the removal of foreign matter.

However, in order for the cleaning body to move smoothly without being held on the grating surface, both the upstream grating 1 and the downstream grating 2 need a certain slope, so the body length of the upstream part is 1. and the downstream body length t2 are almost equal. For this reason, the manufacturing costs of the upstream grid 1 side portion and the downstream grid 2 side portion including the body 5 are approximately the same, and there is a possibility that the overall manufacturing cost will be enormous.

In addition, as the diameter of the fuselage 5 increases with the increase in plant output capacity, the structure of the cleaning body collection section consisting of a lattice part also becomes larger, and the overall length Ll of the fuselage 5 also becomes longer. Installation costs will also increase. Furthermore, since an obstacle such as the vertical flat plate 8 is disposed at the center of the cooling water passage where the flow velocity is highest, there is a drawback that pressure loss also increases.

Incidentally, an even more important problem is the pair of downstream grids 2.
The rectangular passageway formed by the vertical flat plate 8 is likely to attract marine organisms and foreign matter, and the extraction port of the water purification chamber W3 is closed due to the growth of marine organisms and foreign matter. The disadvantage is that it is impossible to extract the washed body because of the base.

[Purpose of the Invention] The present invention aims to shorten the length of the body necessary for collecting cleaning bodies, thereby reducing costs such as production, transportation, and on-site installation. The purpose of this invention is to prevent foreign matter from adhering to the grid and improve the collection efficiency of the cleaning body.

[Summary of the invention]

In order to achieve the above object, the small invention is provided with cooling water passages in the fuselage so as to face each other, to be supported so as to rotate freely, and to be slanted so as to expand toward the upstream side. a pair of collection gratings consisting of a pair of first gratings and a pair of second gratings formed integrally with each of the first gratings and facing each other with a slight gap; and both lower ends of the second gratings. an inlet at a position corresponding to the opening formed in each of the
a pair of cleaning body extraction pipes each having an outlet on the outside of the body; a pair of cover plates disposed above the inlets of the cleaning body extraction pipes; and the first grid and the second grid. and a turbulence generating plate disposed above the joint portion of the turbulence generating plate.

[Embodiments of the invention]

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

3 to 8 show a first embodiment of the present invention, and this first embodiment mainly consists of a fuselage 21 and an 81 grid 22.
It is composed of a collection grid 22 consisting of a and a second grid 22b, a cleaning body extraction pipe 24, a cover plate 26, and a turbulence generation plate 33.

The body 21 has flanges at its upper and lower ends, and cooling water mixed with a cleaning body from a condenser (not shown) passes through a conduit (not shown) connected to the upper flange to the body 21.
The cooling water is introduced into the cooling water passage 23 in 1. Cleaning body extraction pipes 24 are attached to both sides of the bottom of the body 21, and the outlet sides of the cleaning body extraction pipes 24 are connected to a circulation system (not shown).

The upper part of the cooling water passage 23 is divided into two passages 23a and 23b by a partition plate 30'.
b, a pair of first gratings 22a and each of the first gratings 2
Collection gratings 22 are each provided with a pair of second gratings 22b formed integrally with the second gratings 22a and facing each other with a small gap therebetween. the pair of l-th lattices 2
2a, as shown in FIG. 5, is arranged at an angle so as to expand at an excessive angle on the upstream side, and is attached to a shaft 27 provided parallel to the cleaning body extraction pipe 24. There is. As shown in FIG. 6, the shaft 27 passes through the body 21 and projects to the outside, and a handle 28 is attached to the projecting end.
It is rotated.

Further, the first grating 22a and the second grating 22b are shown in FIG.
As shown in FIGS. 4 and 6, each of the vertical machines 22ax + 22bt is arranged with appropriate gaps between them. The lower end of each vertical machine 22a1 of the pair of first gratings 22a is bent as shown in FIG. 5 to form a cleaning body passage 25, and the downstream side of this passage 25 is widened again to clean The body extraction tube 24 is formed to have the same diameter, and the inlet portion 24a of the cleaning body extraction tube 24 is formed to have the same diameter.
It is connected to the. The cleaning body passage 25 is formed so that not only the cleaning body but also slightly large foreign objects can pass therethrough.

When the first grating 22a of the collection grating 22 is displaced to the position shown in chain lines in FIG. 4 through the shaft 27 by operating the handle 28, cooling water passages 2 are formed on both sides of the first grating 223'.
3a is formed, foreign matter adhering to the vertical machine 22a1 can be removed.

Further, since the width of the pair of collection gratings 220 is set equal to the length of the axis 27, the width of the collection gratings 220 is
A vertical flat plate 29 is attached to the inner wall of the fuselage 21 near the vertical machine at the side edge of the grid 22a (see FIG. 3).

A cover plate 26 is provided above the cleaning body passage 25 to form a gap between the first grating 22a and the second grating 22b through which the cleaning body can pass. Moreover, as shown in FIG. 7, the first lattice 22a and the second jfI! ! Child 22b
A turbulence generating plate 33 is installed above the entire joint portion 22C with the first grid 22a and the second grid.
A gap is formed between the grid 22b and the grid 22b, through which the cleaning body can pass. Further, as shown in FIG. 6, the turbulence generating plate 33 has one end connected to the cover plate 26 and the other end connected to the partition plate 30'.
are attached to each.

Next, the operation of the first embodiment configured as described above will be explained.

The cooling water that flows through the heat transfer tube of the condenser and mixes with the cleaned body is passed from the upper end of the body 21 to the cooling water passage 23a,
23b. The cleaning body (not shown) in the cooling water falls into the cleaning body passage 25 while rolling on the first grid 22a and the g2 grid 22b, and further passes through the cleaning body extraction pipe 24 to the outside of the body 21. It is discharged and collected reliably.

On the other hand, since foreign substances such as shellfish, garbage, and small fish are mixed in the cooling water, these foreign substances flow into the body 21 in the same way as the cleaning body. Therefore, if foreign matter is mixed in the cooling water, it becomes difficult for the cleaning body to roll smoothly as described above. In other words, the foreign matter is in the first lattice 22.
If the gap is smaller than the gap between the legs 22air and 22tg of the second grid 22b, it will easily pass through together with the cooling water, but if the gap is larger than the gap, a part of it will roll over the legs 22a1+22bI together with the cleaning body. The waste is then collected through the washer passage 25 and the washer extraction tube 24.

On the other hand, as shown in FIG. 7, the cooling water A that has flowed into the fuselage causes a turbulent flow B to be generated between the first grating 22a, the second grating 22b, and the turbulent flow generating plate 33 through the turbulence generating plate 33. Occur. Therefore, some of the foreign matter in the cooling water A and the cleaning body are removed from the turbulent flow B.
The turbulence is drawn into the turbulence generation area, flows between the turbulence generation plate 33 and the joint 22C, and then flows down toward the cleaning body passage 25.

Furthermore, a cover plate 26 is installed above the cleaning body passage 25,
Since the inflowing cooling water is configured to generate turbulence between the cover plate 26 and the cleaning body passage 250, the cleaning body and foreign matter flowing down between the joint portion 22C and the turbulence generation plate 33 are , flows down into the cleaning body passage 25 while being drawn into the turbulent flow generation region of the cover plate 26, and further flows into the cleaning body extraction pipe 24.
is collected externally by a fence.

According to the first embodiment described above, by configuring the collection grid 22 in one stage, the body length L4 (Fig. 3) is approximately half the body length Ll (Fig. 1) of the conventional example. Therefore, the number of parts can be reduced and the manufacturing cost of the entire device can be significantly reduced.

Further, since the vertical bars 22al of the first lattice 22a are notched only at the attachment portion of the second lattice 22b, as shown in FIGS. 3 and 6, the material corresponding to this notched portion can be saved. I can do it. Furthermore, since the one-stage collection grid 22 consisting of the first grid and the second grid is configured to expand as its shaft 27 rotates, the number of driving parts can be reduced compared to the conventional example. It is possible to further reduce manufacturing costs.

Even if the collection grid 22 is configured in one stage, its #4 slope can be set to be the same as that of the conventional example, so there is no fear that the cleaning body will be squeezed between the grids, and the collection grid 22 The oscillation effect can be treated to the same extent as in the conventional example. In particular, the provision of the shoe plates 26 and the turbulence generating plates 33 prevents foreign matter in the cooling water from forming a layer on the surfaces of the gratings 22a, 22b or the grating joints 22C, and improves the flow of the cooling water and the cleaning body. Since the transfer is carried out smoothly, the cleaning body can be reliably thinned.

In addition, as shown in FIGS. 1 and 2, in the conventional example, the body length Ls
The cleaning body extraction pipe 24 is connected to two cooling water passages formed in the center of the body 21, so that the cleaning body is carried out at the center of the cooling water passage 23 where the flow velocity is high. On the other hand, in this British embodiment, the cleaning body passage 25 and the cleaning body extraction pipe 24 are arranged on the wall side where the flow rate is slow, and the body length L4 is shortened (L4<Ll), which greatly reduces the pressure loss. It can be reduced.

Next, a second embodiment of the present invention will be described with reference to FIGS. 9 to 11.

In this second embodiment, a partition plate 3 is arranged inside a body 31 having a large diameter.
The cleaning body collecting device of the first embodiment, that is, the structure shown in FIGS. 3 to 8, is provided in the cooling water passage which is divided into two parts and has a semicircular cross section. It is.

In this second embodiment, when cooling water from a condenser (not shown) flows into the body 31, it flows into a cooling water passage 39 which is divided into two by the partition plate 30. do. The cleaning body mixed into the branched cooling water is collected by collecting grids 32A and 32B that divide the valley cooling water passage 39 into two and sandwich the center line M parallel to the partition plate 30. Each is collected separately. These collection gratings 3, 2A, 32
B is formed by substantially integrally combining the first grating 32Aa and the second grating 32Ab, and the first grating 32Ba and the second grating 32Bb, respectively. The collection grating 32A.

The cleaning bodies collected on the respective surfaces of the cleaning body 32B fall along the inclined surfaces of the first and second gratings, which are appropriately set to slope, and enter the cleaning body passage 35 configured on the center line M. It is injected and then reliably extracted through the cleaning body extraction pipe 34. Further, the fruit picking grids 32A, 32B are arranged on collecting grid shafts 3 which are rotated by operating the handles 38A, 38B.
7A, 37B.

On the other hand, the cover plate 26 and the turbulence generating plate 33 have basically the same configuration as in the first embodiment. That is, the cover plate 26 is placed above the cleaning body passage 35, and the turbulence generating plate 33 is placed above the first lattice 3.
By installing it above the joint between 2Aa, 32Ba and the second lattice 32Ab, 32Bb, the same effect as in the first embodiment can be achieved. Therefore, the second
According to the embodiment, even if the fuselage has a large diameter, by dividing the cooling water passage, the inclination of the collection grid can be set appropriately, and the length of the fuselage can be shortened. It can be measured.

Further, a third embodiment of the present invention will be explained with reference to FIGS. 12 to 15. Among the symbols in FIGS. 12 to 15, the same symbols as those in FIGS. 9 to 11 indicate the same or corresponding parts.

This third embodiment is based on the second embodiment (Figs. 3 to 8).
It has basically the same configuration as . However, when the diameter of the body 41 increases, with the cleaning body passage 45 disposed on the wall side of the body 41, the second lattice 42Ab.

The inclination angle of 42Bb may deviate from the appropriate range.

For this reason, the cleaning body does not roll smoothly on the second gratings 42Ab, 42Bb, so in the third embodiment, the inclination angle of the second gratings 42Ab, 42Bb is set to an appropriate ia range.

Setting the second lattices 42Ab and 42Bb in this way,
The cleaning body passage 45 is connected to the cooling water passage 3 as shown in FIG.
9, the third lattice 42 has an appropriate dihedral angle from the inner wall side of the body 41 of this cooling water passage 39.
By disposing AC and 42BC, the cleaning body can smoothly roll and fall into the cleaning body passage 45.

In the third embodiment, the cooling water passages 39 having a semicircular cross section are formed by dividing the rainbow body 41 into the partition plate 40 in the axial direction, and each center line M dividing each passage 39 into 11 halves is defined. Fruit thinning grids 42A, 42 provided oppositely as boundaries
B is installed in each passage 39. Among the fruit thinning grids, the one on the partition plate 40 side 42A is the first grid 42A.
a The second lattice 42Ab and the third lattice 42AC are integrally combined, and the one 42B on the wall side of the body 41 is composed of the first lattice 42Ba, the second lattice 42Bb and the third lattice 42
It is composed of BCs connected together. These grids 4
2Aa, 42Ab, 42AC and 42Ba, 42Bb
.

A cleaning body passage 45 is formed in each valley of 42BC, and each of these passages 45 communicates with the inlet portion of each cleaning body extraction pipe 44, respectively.

Further, each cover plate 26 and turbulence generating plate 33 are connected to the first.
The configuration is basically the same as that of the second embodiment. That is, each cover plate 26 is installed at a position above each fluid passage 45,
Each turbulence generating plate 33 includes the first gratings 42Aa, 42Ba, the second gratings 42Ab, 42Bb, and the third grating 42AC.
, 42BC are installed above the valley ship part. Further, the first gratings 42Aa, 42Ba are connected to shafts 47A driven by operating handles 48A, 48B, respectively.
, 47B, respectively. The rest of the structure is the same as that of the second embodiment, so the explanation will be omitted.

According to the third embodiment, even if the diameter of the body further increases, the inclination of the fruit thinning grid can be set appropriately with the one-stage configuration, so the memory board and the turbulence generating board can be installed effectively. Therefore, it is possible to shorten the length Ls of the body.

Note that the turbulence generating plate in the above-mentioned valley embodiment is not limited to the plate shape, but can be applied to any shape as long as it is chevron-shaped or any other shape that can generate turbulence. can do.

〔Effect of the invention〕

As explained above, the present invention not only reduces the length of the body necessary for collecting the cleaning body, but also reduces the costs of manufacturing, transportation, and on-site installation. It is possible to prevent marine organisms and other foreign substances from adhering to the fruit thinning lattice, thereby improving collection efficiency.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing an example of a conventional tubular heat exchanger cleaning body collection device, FIG. 2 is a sectional view taken along line A-A in FIG. 1,
FIG. 3 is a vertical sectional view showing the first embodiment of the cleaning body collecting device of the present invention, and FIGS. 4 to 6 are respectively shown in FIG. 3 (DB
B, B-Bl, C-Cw cross-sectional view, Figure 7 is the 6th
8 is a partially enlarged perspective view of the cover plate and turbulence generating plate of the first embodiment, and FIG. 9 is a cross-sectional view of the second embodiment according to the present invention. , Figure 10 is E in Figure 9.
11 is a sectional view taken along line F-Pi in FIG. 10, FIG. 12 is a cross-sectional view of the third embodiment of the present invention, and FIG. - A cross-sectional view along line D,
FIG. 14 is a cross-sectional view taken along the line H--H in FIG. 13, and FIG. 15 is a partially enlarged perspective view of the evacuation plate and turbulence generating plate of the third embodiment. 21.31.41... Fuselage, 22, 32A, 32B.
... Collection grating, 22a, 32Aa, 32Ba, 42Aa
. 42 B a-first lattice, 22b, 32Ab, 32Bb
. 42Ab, Shrine-42Bb...Second grid, 42AC. 42 B C-...Third lattice, 2. L 23a, 23b
, 39...Cooling water passage L 24,34.44...Cleaning body extraction hole, 25.35.45...Cleaning body passage, 26.
...Cover plate, 33...Turbulence generating plate, 30.30',
40.40'...Partition plate. 〃1st Prisoner No. 215a No. 95! J CharO figure 2 Ab $138J '$t4 figure 42, σb Mine 15 figure

Claims (1)

[Scope of Claims] 1. A pair of cooling water passages in the body, which are rotatably supported so as to face each other and are inclined so as to widen toward the upstream side. 1 lattice and these M
A pair of collection gratings each consisting of a pair of second gratings formed integrally with the L grating and facing each other with a small gap therebetween, and corresponding to openings respectively formed at both lower ends of the second gratings. a pair of cleaning body extraction tubes each having an inlet at a position where the cleaning body is extracted and an outlet at the outside of the body; a pair of cover plates disposed above the inlet portions of both of the cleaning body extraction tubes; A cleaning body collection device comprising a turbulence generating plate disposed above a joint between a grid and a second grid. 2. The cleaning body collecting device according to claim 1, wherein the interior of the body is divided into a plurality of cooling water passages via a partition plate. 3. The above-mentioned cleaning body collecting grid is constructed by integrally combining a first grid, a second grid, and a third grid, and a cleaning body passage is formed in the valley of the main grid. The cleaning body collection device according to item 1 or 2.