JPS6135834Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a structure for attaching a lower water tank of a cooling tower and a connecting portion for connecting horizontal pipes such as a supply pipe and a discharge pipe to the lower water tank.

Conventionally, the lower water tank of a cooling tower is made of reinforced plastic (FRP), and the horizontal pipes are iron pipes. However, the installation location of the cooling tower is usually determined, and the horizontal pipes that run from indoors are often already installed, but the axis of the horizontal pipe and the cooling tower In most cases, the positions of the axes of the tube attachment holes are slightly shifted in these directions, and the positions are also slightly shifted vertically or horizontally.

Therefore, in the conventional system, even if there is a slight deviation, the connection is forced, and the lower water tank of the cooling tower, which is somewhat flexible, is installed with a corresponding distortion.

However, such strain-induced loads shorten the life of the lower water tank, cause cracks, and cause water leakage from the connections.

Therefore, in cases where the misalignment is large, a bellows tube made of synthetic rubber may be interposed, but the inside is also uneven and there is resistance to water flow, and in areas where there is negative pressure such as on the suction side. If the bellows pipe is used, it may collapse and the necessary flow rate may not flow.

Therefore, this idea was created to create a mounting structure that sufficiently follows the above-mentioned misalignment, completely shuts off water at the mounting part, and hardly deforms even under negative pressure. be.

In this invention, a flexible connecting pipe made entirely of elastic material is connected to a pipe mounting hole provided in the upright wall of the lower water tank molded from reinforced synthetic resin. The flange has a flange that can be butted against the flange of the horizontal drawing pipe, the other flange is in contact with the outer surface of the upright wall of the water tank around the pipe mounting hole of the water tank, and the flange further penetrates the pipe mounting hole from this flange. A short end tube portion protruding into the water tank is formed as a part of the flexible connecting tube, and a central short tube portion between the two flanges of the flexible connecting tube has a slightly thicker wall. A highly rigid donut-shaped seat plate with approximately the same diameter as the outside diameter of the flange is attached to the back side of each flange, and is aligned with the water tank upright wall around the pipe attachment hole of the water tank and the flexible connecting pipe. The three parts of the donut-shaped seat plates are tightened and connected by several bolts and nuts each fitted with a washer covered with an elastic layer on the inside of the upright wall. Due to the force, the inner circumferential surface of the vault through hole of the flange that is in close contact with the outer surface of the aquarium is brought into close contact with the outer circumferential surface of the vault shaft that passes through it, and the other side of the flange that butts against the horizontal draw pipe and the other side of this back This horizontal draw pipe installation structure for a lower water tank of a cooling tower is characterized in that the donut-shaped seat plate is also provided with several vault holes formed in the same circle.

The invention will now be explained based on the illustrated representative embodiment.

In the figure, numeral 10 is a cooling tower, and numeral 11 is a lower water tank, which is usually made of slightly flexible FRP. Reference numeral 12 denotes a pipe attachment hole provided in this upright wall 13, and several vault through holes 14 are bored around this tube attachment hole 12.

Reference numeral 15 denotes a flexible connecting tube made of an elastic material, such as synthetic rubber, which is molded separately from these, and the central short tube section 16 has a relatively thick wall, and has ribs 17 that protrude outward at two locations in the circumferential direction. Flanges 18 and 19 are provided at both ends of these central short tube portions 16, and several vault through holes 20 and 21 are provided in these, respectively, located concentrically. Furthermore, an end short tube portion 22 is formed that projects from the flange 19, and the inner diameter D ₁ of this end tube portion 22 is slightly larger than the inner diameter D ₀ of the central short tube portion 16 .

23 and 24 are the central short pipe portion 1 of the flexible connecting pipe.
It is a donut-shaped seat plate that is fitted onto the outer circumference of the 6 parts, and its outer diameter is equal to the outer diameter of the flanges 18 and 19, and the vault through holes 25 and 25 are located at the same position as the vault through holes 20 and 21. 26 are drilled,
The seat plates 23 and 24 are made of highly rigid material such as iron, aluminum, other metals or alloys, or hard synthetic resin.

27 is a bolt for tightening, and 28 is a nut.
30 is a washer in which a core material 31 is covered with an elastic layer 29.

Each of these constituent members is assembled as follows.

That is, the short end tube part 22 of the flexible connecting pipe 15 is inserted into the pipe attachment hole 12 of the lower water tank 11, and the vault 27 with the washer 30 covered with the elastic layer 29 fitted at the base is inserted inside the water tank 11. The through hole 14 of the water tank 11,
The flexible connecting tube 15 is sequentially passed through a through hole 21 provided in the flange 19 and a through hole 25 in the seat plate 24, and is tightened with a nut 28, respectively.

In the structure of this invention constructed in this way, the flexible connecting pipe 15 made of an elastic body is attached to the pipe attachment hole 12 of the lower water tank 11 as described above, so it is easier to use than an iron pipe with a flange 33. Even in the case where the flexible connecting pipe 15 is connected to the horizontal drawing pipe 32, the flexible connecting pipe 15 is connected to the root of the flange 19 and the central short pipe part 1.
6, so even if the axial center of the pipe attachment hole 12 and the axial direction or position of the horizontal drawing pipe 32 are shifted vertically or horizontally, they can be sufficiently deformed. There is no risk of distorting the water tank 11 or the horizontal pipe 32, and the connection work between the water tank and the horizontal pipe becomes extremely easy, and the work efficiency is improved.

Further, at the contact surface between the flexible connecting pipe 15 and the tube attachment hole 12, the inner circumference of the elastic flange 19 is connected to the inner circumference of the tube attachment hole 12 and the donut-shaped seat plate 24. It has a perfect watertight effect because it is backed up and flattened and held evenly over the entire circumference. However, the state of close contact between the flange 19 and the upright wall 13 around the pipe attachment hole 12 does not change, and the watertight state is maintained.

Furthermore, in each of the vault through holes 21 of the flange 19, the outer peripheral surface of the vault 27 passing through these holes is in close contact with the inner peripheral surface of the through hole 21, so that the elastic body 29 Together with the coated washer 30, the water in the water tank 11 will not leak to the outside through the circumferential surface of the vault 27.

Furthermore, in this device, the flange 33 of the horizontal draw pipe 32 and the flange 18 of the flexible connecting pipe 15 are
Even when they are butted together and tightened with the bolt 27 and nut 28, the donut-shaped seat plate 23 backs up the flange 18 and is pressed against the flange 33 of the horizontal drawing pipe 32 by averaging the entire circumference. Therefore, water will not leak from the joint between the flexible connecting pipe 15 and the horizontal drawing pipe 32.

In addition, in the structure of this invention, since the short end pipe part 22 protrudes into the water tank 11, when used as a mounting part structure for a supply pipe, a water sprinkler pipe 35 can be inserted, and also as a mounting part for a discharge pipe. When used as a structure, these can be easily attached by inserting a strainer (not shown) into the short end tube section 22 and tightening them from the outside of the short end tube section 22 using the respective tightening bands 36. It will be done.

In addition, since the central short tube portion 16 of the flexible connecting tube 15 is formed with a relatively thick wall, there is no risk of collapse even under slight negative pressure, and in the embodiment, ribs 17 are provided, so that Furthermore, the effect is remarkable.

In addition, in the above-mentioned system, the vibrations of the blower installed in the cooling tower can also be prevented by the flexible connecting pipe 1.
It is absorbed in 5 parts and is not transmitted into the room through the horizontal drawing pipe 32.

[Brief explanation of the drawing]

The drawings relate to a typical embodiment of this invention, in which Fig. 1 is a longitudinal side view, Fig. 2 is a longitudinal side view showing an example of the washer, and Fig. 3 shows another embodiment of the washer. FIG. 4 is a side view showing the state of connection between the cooling tower and the horizontal draw pipe. In the figure, numerals: 10...Cooling tower, 11...Lower water tank, 12...Mounting hole, 15...Flexible connecting pipe, 1
6... Central short pipe section, 18, 19... Flange, 2
2... End short pipe section, 23, 24... Seat plate, 27...
Vault, 28... Nut, 30... Elastic layer coated washer, 32... Horizontal drawing pipe, 33... Flange of horizontal drawing pipe.

Claims (1)

[Scope of utility model registration request] A flexible connecting pipe made entirely of elastic material is connected to the pipe mounting hole provided in the upright wall of the lower water tank molded from reinforced synthetic resin, and one flange of this flexible connecting pipe is horizontally drawn. The flange has a flange that can be butted against the flange of the pipe, the other flange is in contact with the outer surface of the upright wall of the water tank around the pipe attachment hole of the water tank, and the flange penetrates the pipe attachment hole from this flange to the water tank. A short end tube portion protruding inward is formed as a part of the flexible connecting tube, and a central short tube portion between the two flanges of the flexible connecting tube has a slightly thicker wall. A highly rigid donut-shaped seat plate with approximately the same diameter as the outside diameter of the flange is attached to the back side of each, and the water tank upright wall around the pipe attachment hole of the water tank, the flexible connecting pipe, and a donut The three parts of the mold base plate are tightly connected by several bolts and nuts each fitted with a washer covered with an elastic layer on the inside of the upright wall,
Due to this tightening force, the inner circumferential surface of the vault through hole of the flange that is in close contact with the outer surface of the aquarium is brought into close contact with the outer circumferential surface of the vault shaft that passes through it, and the flange that abuts against the horizontal draw pipe and the back surface thereof A horizontal draw pipe attachment structure for a lower water tank of a cooling tower, characterized in that several vault holes are formed on the same circle in each of the other donut-shaped seat plates.