JPH0229428Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to an in-line heat exchanger, particularly for use in a drainage pump driven by a diesel engine, etc., to cool engine cylinder cooling water using the drainage water. This relates to the in-line heat exchanger used.

[Prior art]

A schematic configuration of a conventional in-line heat exchanger of this kind is shown in FIGS. 5a and 5b.

That is, in each of these figures, the heat exchanger main body 1 has side flanges 4 in the longitudinal axis direction for the purpose of facilitating disassembly and assembly for internal cleaning etc.
It consists of a lower casing 2 and an upper casing 3, which are divided into upper and lower halves and are removably attached via 4.
The lower casing 2 and the upper casing 3 have circumferential end flanges 5, 5 at both ends in the axial direction when they are attached to each other and are connected to a drainage main pipe (not shown).
is provided.

A heat exchange chamber 6 having a flow path diameter, in other words, a diameter larger than the inner diameter of the drainage main pipe, that is, the inner diameter of the end flanges 5, 5, is formed inside the casing. An inlet side collecting pipe 7 having a substantially semicircular arc shape facing in the circumferential direction is located in the upper half of each of the inlet side and outlet side ends outside the flow path diameter that does not create flow path resistance for drainage. and outlet-side collecting pipes 8 are disposed facing each other, and from one of the lower ends thereof, an inlet pipe 9 and an outlet pipe 10 are tightened to the lower housing 2 and taken out to the outside, and both of these pipes are A large number of heat transfer tubes 1 are connected between the collecting tubes 7 and 8 so as to be parallel to the flow path.
1 are arranged in series, and an inspection window 12 is provided at a suitable position on the upper housing 3.

However, the conventional heat exchanger configured in this manner is used, for example, in a drainage facility shown in FIG. That is, this drainage facility uses a drainage pump C that is rotationally driven by a diesel engine A via a reduction gear B, and this drainage pump C drains water containing sludge, etc. in a water tank D to the outside from a drainage main pipe E. It has a configuration that allows
For this heat exchanger, connect it to the drain main E.
The diesel engine A is placed in the middle of the
A circulation pipe F communicating with the jacket surrounding each cylinder is connected, and an expansion tank G and a circulation pump H are interposed in this circulation pipe F to cool the cylinders and cool the heated cooling water. The circulation pump H circulates and supplies the heat to each heat transfer tube 11 to cool it again.

Heat exchangers used in this way are used to discharge sewage, rainwater, river water, etc., and the wastewater generally contains sludge, etc.
In order to prevent this from being deposited at the bottom of the flow path in the main body, the bottom of the flow path is aligned with the bottom of the drainage main flow path, and the inlet and outlet sides are arranged in the upper half. Regarding the decrease in heat exchange efficiency due to the adhesion of sludge to the tubes 7, 8 and the heat transfer tube 11, this should be constantly inspected through the inspection window 12, and if a predetermined amount or more of adhesion of sludge is confirmed,
The upper housing 3 is removed to clean the inlet and outlet collecting pipes 7 and 8 and the heat transfer tubes 11, as well as the insides of the housings 2 and 3.

However, this conventional configuration has the following drawbacks due to its configuration when it is disassembled and reassembled for cleaning the sludge and the like.

That is, in order to remove the upper housing 3, it is necessary to loosen all the bolts that attach the flanges 4 and 5 between the upper housing 3, the lower housing 2, and the drain main pipes on the inlet and outlet sides. In addition, in order to obtain enough clearance between the two drainage mains to allow for extraction, not only is it necessary to insert an extra auxiliary member such as a loose pipe in the middle of the two drainage mains, but the auxiliary member is Due to this intervention, the lengths of both drainage main pipes have become unnecessarily long, and furthermore, the pipe lengths of both drainage main pipes have become unnecessarily long, and furthermore, the pipes 7 and 8 on the inlet side, the outlet side collecting pipes 7 and 8, and the heat transfer pipe 1 have been removed from inside the lower housing 2.
1, the inlet and outlet pipes 9 and 10 had to be removed one by one, which was extremely troublesome and inefficient.

[Problem that the invention attempts to solve]

This idea was developed to solve these drawbacks of the conventional heat exchanger, and by devising the cross-sectional shape of the lower and upper casings that make up the heat exchanger body, it is possible to connect the drain main pipe. The end flange is installed only on the lower casing, and when assembling the inlet side, outlet side collecting pipe, its inlet side, outlet side piping, and heat transfer tube, it is installed only on the upper casing. Disassembly and assembly for cleaning etc. can be performed by attaching and detaching the upper casing to the lower casing.

[Means for solving problems]

In other words, this invention is designed to install an inlet-side, an outlet-side collector pipe, and a collector pipe for these pipes, which are interposed in a flow pipe for drainage water used as cooling water, and are placed inside the heat exchange chamber outside the flow path diameter of the flow pipe. In an in-line heat exchanger in which a heat exchange section is configured by arranging a large number of heat transfer tubes parallel to the flow path direction so as to connect both collecting pipes with each other, the lower casing and the lower casing The heat exchanger main body is constituted by an upper casing that is detachably attached to the open end flange of the heat exchanger, and the lower casing has an end flange for connection to the flow path piping, and the upper casing has a support rod. The heat exchanger is attached to the heat exchanger, and piping is provided on the inlet side and the outlet side of the heat exchanger.

〔Example〕

Hereinafter, embodiments of the in-line heat exchanger according to this invention will be described in detail with reference to FIGS. 1 to 4.

FIGS. 1 and 2 show a schematic configuration of the first embodiment.

In this first embodiment, the heat exchanger body 13
The lower housing 14 has a substantially U-shaped cross-sectional shape and has a volume sufficient to accommodate a heat exchange section to be described later, and a lid-shaped upper opening end flange 15 of the lower housing 14. The upper housing 16 is detachably and liquid-tightly attached, and the lower housing 14 has circumferential end flanges 1 at both axial ends thereof to be connected to a drainage main pipe (not shown).
7 and 17, a heat exchange chamber 18 having a diameter larger than the flow path diameter is formed inside, and a drain chamber 19 and a drain drain pipe 20 are provided at the inner bottom.

In the heat exchange chamber 18 of the lower casing 14, concentric circles at the inlet and outlet ends outside the flow path diameter, which do not cause drainage flow path resistance, are provided.
The inlet-side collecting pipe 21 and the outlet-side collecting pipe 22 having an annular shape are opposed to each other, and the supporting rods 2 are connected to each other.
3 and 24 to the upper housing 16,
And from these inlet side collecting pipe 21 and outlet side collecting pipe 22, an inlet pipe 25 and an outlet pipe 26 are connected.
is tightened to this upper housing 16 and taken out to the outside, and a large number of heat transfer tubes 27 are connected in parallel to the flow path so as to connect both of these collecting tubes 21 and 22 with each other to transfer heat. As a replacement part, and at least in the area of the inner bottom corresponding to the drain chamber 19,
A protective rod 28 is provided on the inner circumferential side of the heat exchanger tube 27 in the same part, and an inspection window 29 is further provided as appropriate.
4, the lower housing 14 has a connection function to the drainage main, and the upper housing 1
6 has the function of fixing the heat exchange section formed by both the collecting pipes 21, 22 and the heat transfer tube 27, and the function of inflowing and outflowing the cylinder cooling water.

Here, the lower casing 14 does not necessarily have to have the cross-sectional shape as shown in the drawings, and the inner bottom portion may be made to match the diameter of the flow path as in the conventional example described above. The same applies to the inlet side and outlet side collecting pipes 21 and 22 and each heat transfer tube 27, which serve as the heat exchange section, and may be set in accordance with the cross-sectional shape of the upper housing 14.

Therefore, in the case of the device configuration of the first embodiment, when disassembling and assembling for internal cleaning etc., the upper housing 16 is removed from the lower housing 14, and both the inlet side and outlet side piping 25 are removed as necessary. , 26, the heat exchange section consisting of both the inlet side and outlet side collecting pipes 21, 22 and each heat transfer tube 27 can be connected to the lower case 14 together with the upper case 16. It can be easily removed from the housing and easily installed by the opposite operation, and it is possible to remove sludge, etc. from the heat exchange part and both housings 14 and 16 in the removed state. , cleaning becomes possible.

That is, in this first embodiment, unlike the conventional example, when disassembling and assembling for internal cleaning etc., each drainage main pipe and each end flange 17 are removed and attached, and both the inlet side and outlet side piping are removed. 2
It is not necessary to remove and attach the parts 5 and 26 one by one, and furthermore, there is no need to interpose a loose pipe in the drain main pipe, and this disassembly and assembly can be carried out with extremely simple operations and with good workability.

Moreover, since the upper housing 16 is liquid-tightly attached to the upper opening end flanges 17, 17 of the lower housing 14, even if relatively high-pressure waste water flows through the flow path in the main body, this waste water will flow between both the 14 , 16 to the outside from the joints. In addition, since the inlet-side collecting pipe 21 and the outlet-side collecting pipe 22 are fixed to the upper housing 16 via the support rods 23 and 24, the drainage water can separate both the collecting pipes 21 and 22 and the heat transfer tube 27. This prevents the inconvenience of the heat exchanger from swinging and even falling off.

Further, as in the second embodiment shown in FIG. 3, the upper housing 16 is formed into a substantially flat plate shape, and is unevenly distributed on one side of the flat plate surface, so that the upper housing 16 is located on the entrance side,
By combining both pipes on the outlet side, a removable inspection window 29 can be formed in a relatively wide range of other parts, thereby improving the operation and effect of the first embodiment. In addition, it becomes easy to check the state of dirt inside through this inspection window 29, and in some cases, by opening and closing this inspection window 29, it is also possible to clean the interior from here. .

Furthermore, as in the third embodiment shown in FIG.
By arranging the upper housing 16 and the heat exchange section, it is possible to disassemble and take them out on the same side, and here, the same effect as in the first embodiment is achieved.
In addition to this effect, removal, installation and cleaning operations are now easier.

[Effect of idea]

As detailed above, according to this invention, in an in-line heat exchanger that is interposed in a flow path piping for drainage water used as cooling water, the heat exchanger main body is connected to the lower and upper casings. The lower casing is provided with an end flange for connection to the flow path piping, and the upper casing is provided with a heat exchange section consisting of both collector pipes on the inlet side and outlet side and each heat transfer tube, and the inlet side and outlet side. Since both side piping are provided, these can be easily disassembled and installed by simply removing the upper housing from the lower housing and installing them.
It is possible to assemble the unit, which makes cleaning the interior including the heat exchange part extremely easy and effective, and the upper housing is attached to the open end flange of the lower housing in a liquid-tight manner. Therefore, even if relatively high-pressure waste water flows through the channel within the main body, this waste water will not leak to the outside from the joint between the two. Furthermore, since the inlet side collecting pipe and the outlet side collecting pipe are fixed to the upper casing via the support rod, the heat exchange section consisting of both the collecting pipes and the heat transfer tube is swayed by the drainage water, causing the heat exchanger to expand. This will not cause any inconvenience such as falling off. Moreover, it has various practically useful features such as a relatively simple device configuration and easy implementation.

[Brief explanation of the drawing]

Figures 1 and 2 are longitudinal and cross-sectional views showing the general configuration of an in-line heat exchanger according to a first embodiment of the invention, and Figure 3 is a cross-sectional view of an in-line heat exchanger according to a second embodiment of the invention. A plan view, FIG. 4 is an end view of an in-line heat exchanger according to the third embodiment, and FIGS. 5 a and 5 are a half-cut side view and a cross-sectional view showing the general configuration of an in-line heat exchanger according to a conventional example. FIG. 6 is a configuration diagram showing an outline of a drainage pump device to which the above in-line heat exchanger is applied. 13... heat exchanger main body, 14 and 16... lower and upper housing, 17... open end flange,
18... Heat exchange chamber, 21 and 22... Inlet side and outlet side collecting pipe, 23 and 24... Support rod,
25 and 26...Inlet side and outlet side piping, 2
7...Heat transfer tube.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) Intervening in a flow path piping for drainage water used as cooling water, etc., and collecting water on the inlet side and the outlet side inside the heat exchange chamber outside the flow path diameter of the flow path piping. In an in-line heat exchanger in which a heat exchange section is constructed by arranging a tube and a large number of heat transfer tubes parallel to the flow path so as to connect the two collecting tubes, the lower casing and A heat exchanger main body is constituted by an upper casing that is detachably attached to the open end flange of the lower casing, and the lower casing has an end flange for connection with the flow path piping.
An in-line heat exchanger, characterized in that the heat exchanger is attached to the upper housing via a support rod, and piping is provided on the inlet and outlet sides thereof. (2) The upper casing is formed into a substantially flat plate shape, and both the inlet and outlet piping are arranged together on one side of this flat plate, and the other parts are connected and detached over a relatively wide range. Claim 1 for registration of a utility model characterized by the formation of a flexible inspection window
In-line heat exchanger as described in section. (3) The in-line heat exchanger according to claim 1 of the utility model registration, characterized in that an upper housing is provided on the side of the heat exchanger body.