JPH0249499Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention is designed to pump cooling water that cools the drive sources such as diesel engines of large pump equipment used for pumping urban wastewater and rainwater drainage. This invention relates to a water pipe type cooler that is cooled by the flowing water itself that is pumped or discharged.

(Prior Art) In recent years, a cooling device as shown in the system diagram of FIG. 7 has been used as a device for cooling a drive source such as a diesel engine of a large pump facility of a drainage pump station for urban drainage, rainwater drainage, etc. In FIG. 7, the driving rotation of the diesel engine 1 is reduced by a reduction gear 2, thereby driving the pump 3 to rotate. This pump 3 pumps rainwater and the like from a pump suction water tank 4 through a lift pipe 5 and discharges the rainwater and the like to a flow pipe 8 which is a discharge pipe in which a cooler 6 and a discharge valve 7 are interposed. The cooler 6 is provided with a cooling pipe 6a, one end of which is connected to a tank 9 via a conduit, and the other end cools the diesel engine 1 via another conduit. It is connected to one end of a cooling pipe 1a for cooling. This cooling pipe 1a
The other end is connected to the discharge port of the cooling water pump 10 through a conduit, and the suction port of the cooling water pump 10 is connected to the tank 9 through the conduit. In addition, 11 is a water tank, and the pump 1 is connected to the water tank 11 from the water tank 11.
At step 2, the tank 9 is replenished with cooling water.

Such a cooling device uses the low temperature of the flowing water itself discharged from the pump 3 to cool the diesel engine 1.
It is extremely economical because it cools the cooling water that has been heated by the system.

Incidentally, urban wastewater, rainwater drainage, etc. contain not only sand and pebbles but also garbage such as pieces of vinyl and cloth. For this purpose, the cooling pipe 6a of the cooler 6
When dirt gets caught in the water, it is easy to obstruct the flow of water and damage the cooling pipe 6a.Therefore, the conventional cooler 6 is equipped with a screen or the like to remove large dirt from the running water, and prevents dirt from entering the cooling pipe 6a. It is constructed to prevent it from becoming caught and damaged. Also,
In order for the cooling pipe 6a to absorb expansion and contraction due to thermal expansion, both ends of the cooling pipe 6a are connected to conduits whose bend joints are fixed to the cooler body via flexible joints such as bellows joints or expansion joints.

(Problems to be Solved by the Invention) The conventional cooler 6 has a complicated structure because it is equipped with a screen and the like as described above. Furthermore, since the cooling pipe 6a is integrally connected to the cooler body through a flexible joint or an expansion joint, disassembly work during inspection and repair of the cooler 6 and assembly work during manufacture are complicated. There is a problem.

The purpose of this invention was to solve the above-mentioned problems with the conventional water pipe cooler. To provide a running water tube type cooler which can be easily used.

(Means for solving the problem) In order to achieve the above object, the water tube cooler of the present invention is a water tube cooler installed in a water pipe such as a pump pump or a discharge pipe. The cooler body can be divided by a dividing plane parallel to the flow of water, and both ends of a coiled cooling pipe housed in the cooler body are made to protrude in a direction perpendicular to the dividing plane. Both ends are connected to the conduit fixed to the cooler body via a loose flange, and further, a tensioner that can be freely adjusted forward and backward in the direction of the flow of water to a mounting member to which the cooling pipe is fixed or to the cooler body. A bolt is provided, and the tension bolt is brought into contact with an abutting portion provided on the cooler shell or the mounting member to fix the cooling pipe to the cooler shell.

(Function) Both ends of the cooling pipe are protruded in a direction perpendicular to the dividing plane where the cooler body is divided, and these ends are connected to the conduit fixed to the cooler body via a loose flange, so cooling is By dividing the container body, both ends of the cooling pipe can be removed from the loose flange. Also, the cooling pipe can be removed from the cooler body by loosening the tension bolt. Therefore, it is easy to attach and detach the cooling pipe when inspecting and repairing the cooler. Furthermore, since both ends of the cooling pipe are connected to the conduit via loose flanges, expansion and contraction of the cooling pipe due to thermal expansion can be absorbed by the loose flanges. Furthermore, since the cooling pipe is fixed to the cooler body by adjusting the tension bolt back and forth, even if there is a dimensional error in the cooling pipe and the cooler body, the cooling pipe can be securely fixed.

(Description of Embodiments) Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 4. FIG. 1 is a side sectional view of an embodiment of the water tube type cooler of the present invention, and FIG.
FIG. 3 is a cross-sectional view taken along the line AA in FIG. 1, FIG. 3 is a diagram showing a fixed structure of the cooling pipe, and FIG. 4 is a diagram showing the structure of a loose flange that absorbs expansion and contraction of the cooling pipe.

In the figure, a water tube type cooler 20 has first and second coil-shaped cooling tubes 22 and 23 having different diameters arranged coaxially within a cooler body 21. The inner diameter D1 of the cooler body 21 is formed larger than the inner diameter D2 of the water flow pipe 24.
The inner diameter D3 of the coil of the cooling pipe 23 is formed to be larger than the inner diameter D2 of the water flow pipe 24.
The cooler body 21 is configured to be able to be divided vertically by a dividing plane parallel to the flow of water, and sand discharge pipes 25 are installed at the bottom of the divided lower part slightly downstream of the inlet and slightly upstream of the outlet. , 25 are provided, respectively. coiled first and second cooling pipes 22;
The fixing structure 23 includes a mounting member 26 having a U-shaped cross section,
26... are arranged parallel to the flow direction, and the first and second cooling pipes 22, 23 are fixed and integrated to the mounting members 26, 26... with U bolts 27, 27.... Furthermore, tension bolts 28, 28... are arranged at both ends of the mounting members 26, 26... so as to be able to move forward and backward in the direction of the flow of water.
Tension bolts 28, 28... are strongly abutted using side walls 21a, 21a on both sides of
The mounting members 26, 26... are fixed to the cooler body 21. Further, both end portions 22a, 23a, . . . of the first and second cooling pipes 22, 23 protrude in a direction perpendicular to a dividing plane by which the cooler body 21 is divided in the vertical direction. Both end portions 22a, 23a... are connected to conduits 30, 30... fixed to the cooler body 21 by loose flanges 29, 29.... In Fig. 4, 31 is a seal ring, 32 is a packing, and 33 is a loose flange 2.
This is a connecting pipe that connects the cooler body 9 and the cooler body 21.

In such a configuration, the first and second cooling pipes 2
2, 23 are mounting members 26, 26... and U bolt 2
7, 27... are fixed to the cooler body 21 in a detachable manner by tension bolts 28, 28..., and both ends 22a, 23...
a is loose flange 29, 29... and conduit 30, 3
Since it is removably connected to 0...,
By dividing the cooler body 21 into upper and lower parts, both ends 22a and 23a of the first and second cooling pipes 22 and 23 can be removed from the conduits 30, 30, and further by loosening the tension bolts 28, 28... , first and second
The cooling pipes 22 and 23 can be easily removed from the cooler body 21. Therefore, it is easy to assemble the water pipe cooler 20 during manufacture and to disassemble it during inspection and repair. Note that the cooling pipes 22 and 23 are
Since it is a so-called canned product, it is easy for errors to occur in its dimensions, but this can be absorbed by adjusting the forward and backward movement of the tension bolts 28, 28, and the cooling pipes 22, 2 are reliably fixed.
3 can be fixed to the cooler body 21. Further, both ends 22 of the first and second cooling pipes 22 and 23
a, 23a are connected to the conduits 30, 30, . . . through loose flanges 29, 29, .

Furthermore, a second
Since the inner diameter D3 of the cooling pipe 23 is formed to be large, the fluid flowing from the water flow pipe 24 to the cooler body 21 flows through the second cooling pipe 23 as a side wall of the flow path, and the second cooling pipe 23 allows the fluid to flow through the second cooling pipe 23 as a side wall of the flow path. It flows mainly through its center, unimpeded. For this,
Dust and the like mixed into the fluid are removed from the first and second cooling pipes 2.
There is no chance of getting caught on 2 or 23. In addition,
The tighter the pitch of the coils of the first and second cooling pipes 22 and 23, the more they function as side walls of the flow path, making it easier for dirt and the like to get caught in the first and second cooling pipes 22 and 23. Even less. Furthermore, since the coiled diameters of the first and second cooling pipes 22 and 23 are large, the heat transfer area can be increased accordingly, and the length of the water pipe cooler 20 in the flow direction can be shortened. can.

The flow area of the fluid flowing from the flow pipe 24 to the cooler body 21 rapidly increases at the inlet of the cooler body 21, and after a part of it collides with the second cooling pipe 23, a part of the fluid flows into the cooler body 21. From the gap between the coil pitches of the second cooling pipe 23 and the first cooling pipe 22 to the cooler body 21
After colliding with the circumferential inner wall of the cooler body 21, it flows into the upstream side and the downstream side, and merges with the main stream at the inlet and outlet of the cooler body 21. Therefore, the first and second cooling pipes 2
Sufficient flow flows to cool 2,23. Furthermore, the flow from near the circumferential inner wall of the cooler body 21 to the main stream at the inlet and outlet causes the cooler body 21 to
It is possible to sweep away sand and the like that would otherwise accumulate at the bottom of the water pipe cooler 20 without settling it, and discharge it from the water pipe cooler 20 along with the main stream. According to experiments, if the flow velocity in the cooler body 21 is 0.3 m/s or more, the relationship between the inner diameter D1 of the cooler body 21 and the inner diameter D2 of the water flow pipe 24 is as follows: If D2/D1 is 0.56 or more, Sand, etc. can be sufficiently discharged. If the flow rate flowing through the cooler body 21 decreases and the flow velocity becomes 0.3 m/s or less, sand etc. will not be sufficiently discharged and the cooler body 2
It will accumulate at the bottom of 1. In such a case, when the pump 3 is stopped, the sand discharge pipe 25,
What is necessary is to open a valve or the like (not shown) connected to 25 for an appropriate required period of time to discharge sand and the like along with the drain water.

FIG. 5 is a diagram showing another fixing structure of the cooling pipe. In the above-mentioned fixing structure shown in FIG. 3, tension bolts 28, 28, . In the fixed structure, since the entrance and exit of the cooler body 21 is expanded and contracted in a tapered manner, the locking protrusions 21b, 21b... protruding from the cooler body 21 are used as contact parts instead of the side walls 21a, 21a. The mounting members 26, 26, . . . are fixed to the cooler body 21 by strongly abutting the mounting bolts 28, 28, .

Furthermore, FIG. 6 is a diagram showing still another fixing structure of the cooling pipe. In the fixed structure shown in Fig. 6,
Recesses 21c, 21c... are formed in the tapered portion of the entrance and exit of the cooler body 21, and the recesses 21c, 2
Tension bolts 28, 2 with 1c... as the contact part
8... are strongly abutted to fix the mounting members 26, 26... to the cooler body 21.

In addition, in the cooling pipe fixing structure in the above embodiment, the tension bolts 28, 28... are connected to the cooler body 2.
1 side walls 21a, 21a... and locking protrusions 21b, 2
1b... and the recesses 21c, 21c... to fix the mounting members 26, 26... to the cooler body 21, but the present invention is not limited to these.
Tension bolts 28, 28..., which are arranged in the cooler body 21 so as to be freely adjustable forward and backward, are attached to mounting members 26, 26...
The mounting members 26, 26, . . . may be fixed to the cooler body 21 by strongly abutting them.

(Effect of the invention) As explained above, according to the water tube type cooler according to the present invention, both ends of the cooling pipe are made to protrude in a direction perpendicular to the dividing plane where the cooler body is divided. Since the conduit and the conduit fixed to the cooler body are connected through the loose flange, both ends of the cooling pipe can be removed from the loose flange by dividing the cooler body. Additionally, the cooling pipe can be removed from the cooler body by loosening the tension bolt. Therefore, it is easy to attach and detach the cooling pipe when inspecting and repairing the cooler. Furthermore, since both ends of the cooling pipe are connected to the conduit via loose flanges, expansion and contraction of the cooling pipe due to thermal expansion can be absorbed by the loose flanges. Furthermore, since the cooling pipe is fixed to the cooler body by adjusting the tension bolt to advance and retreat, excellent effects such as being able to securely fix the cooling pipe and the cooler body even if there are dimensional errors in the cooling pipe and the cooler body are achieved.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of one embodiment of the water tube type cooler of the present invention, FIG. 2 is a sectional view taken along line A-A in FIG. 1, and FIG. FIG. 4 is a diagram showing the structure of a loose flange that absorbs expansion and contraction of the cooling pipe, FIG. 5 is a diagram showing another fixed structure of the cooling pipe, and FIG. ,
FIG. 7 is a diagram showing still another fixed structure of the cooling pipe, and FIG. 7 is a system diagram of a cooling device for cooling a drive source of a conventionally used large pump facility. 20... Water tube type cooler, 21... Cooler body,
21a...side wall, 21b...locking protrusion, 21c...
... recess, 22 ... first cooling pipe, 23 ... second cooling pipe, 22a, 23a ... both ends of cooling pipe, 2
6...Mounting member, 28...Tension bolt, 2
9... Loose flange, 30... Conduit.

Claims (1)

[Scope of utility model registration request] In a water pipe cooler installed in a water pipe such as a pump lift pipe or a discharge pipe, the cooler body can be divided by a dividing plane parallel to the flow of water, and the coil is housed in the cooler body. Both ends of a shaped cooling pipe protrude in a direction perpendicular to the dividing plane, both ends of the cooling pipe are connected to a conduit fixed to the cooler body via a loose flange, and further, the cooling pipe is connected to a conduit fixed to the cooler body through a loose flange. A tension bolt that can be freely adjusted forward and backward in the direction of the flow of water is provided on the mounting member to be fixed or the cooler body, and the tension bolt is brought into contact with a contact portion provided on the cooler body or the mounting member. A water tube type cooler, characterized in that the cooling pipe is fixed to the cooler body.