JPH0220003Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) This invention relates to a strainer for collecting and distributing water that is attached to collecting plates that partition the inside of a water treatment tower, such as a filter tower, vertically.

(Prior art) Japanese Utility Model Application No. 60-115593 discloses a cylindrical bushing that is equipped with a head that comes into contact with the upper surface of the water collection and distribution board and that can be inserted into the installation opening of the water collection and distribution board from above and installed. A hollow water collecting and distributing body having a hollow head capable of water, and a hollow water collector having a cylindrical leg whose upper end communicates with the hollow head and extends from the lower surface of the hollow head, and which threadably engages and penetrates the inner periphery of the cylindrical bush. Strainers for water collection and sprinkling are well known.

(Problem to be solved by the invention) In the above conventional example, the leg tube of the water collecting and distributing body is passed through the inner periphery of the cylindrical bushing, and the female threaded cylinder hanging down from the periphery of the lower surface of the hollow head is passed around the outer periphery of the head of the cylindrical bushing. Since it is screwed onto a female thread provided, the engagement length of the screw is short, and during long-term use, the screw loosens due to vibrations, which impairs the horizontality of the hollow head of the water collector, and eventually causes the water collector to become loose. There is a risk that the water body may fall out of the cylindrical bushing.

(Means for Solving the Problems) Therefore, the present invention provides a female thread on the inner surface of the cylindrical bushing, a tapered part on the top surface of the head, and a screw on the outer periphery of the cylindrical leg of the water collecting and distributing body. It is characterized by a lock nut with a downwardly facing recess that fits into the hollow head screwed into the bottom of the hollow head.

(Function) Insert the cylindrical bushing into the mounting opening of the water collecting and distributing plate from above, and attaching the cylindrical bushing to the mounting opening by bringing the lower surface of the head into contact with the top surface of the water collecting board, and then insert the cylindrical bushing into the mounting opening of the water collecting and distributing body. is screwed into the inner periphery of the cylindrical bushing, and the horizontality of the hollow head is adjusted before the concave part of the lock nut located on the bottom surface of the hollow head fits into the tapered part on the top surface of the cylindrical bushing head. Level it horizontally, then turn the lock nut to tighten it onto the head of the hollow bush, fit the concave part of the lock nut into the tapered part on the top surface of the head of the cylindrical bush, and fix it from above.

(Embodiment) In the illustrated embodiment, 1 is a cylindrical bush;
3 is a hollow water collecting body, 4 is a hollow head through which water can pass, and 5 is a cylindrical leg. The cylindrical bush 1 and water collector 3 are molded plastic products.

On the outer periphery of the cylindrical bushing, there is a step 7 extending from the lower surface of the head 2 at a distance approximately equal to the thickness of the water collection plate 6, and from this step 7 the outer diameter of the upper part 1' is is approximately equal to the inner diameter of the installation port 6' of the water collection plate, and below the step 7 there is a conical portion 8 whose diameter decreases downward, and beyond that there is a cylindrical portion 9 with an outer diameter smaller than that of the installation port 6'. It's summery. A plurality of slits 10 are formed at equal intervals in the circumferential direction over the upper portion 1' and the conical portion 8.

Therefore, when the cylindrical bushing 1 is pushed into the mounting opening 6' from the straight cylindrical part 9 side as shown in FIG. The part of the conical part 8 separated by the slit 10 is deformed inward, and when the conical part 8 passes down through the mounting opening 6', it elastically returns to its original state, and the part between the lower surface of the head 1 and the step 7 deforms inward. This pinches the edge of the mounting opening 6' and prevents it from coming out from the mounting opening 6' in either the up or down direction.

The reason why the lower end of the slit 10 mentioned above is located halfway between the conical portion 8 and the straight cylindrical portion 9 is to prevent a decrease in strength by locating it to the lower end of the straight cylindrical portion. Incidentally, in order to facilitate deformation when inserting into the mounting opening 6', the inner diameter of the upper part 1' may be larger than that of the conical part 8 or the straight cylindrical part 9 as shown in the drawing.

The upper surface of the head 2 has a concentric tapered part 1.
1 is raised, and the inner periphery, in this embodiment, the head 2
A female thread 12 is provided on the conical portion 8.

The hollow head 4 of the hollow water collecting and distributing body 3 consists of a dish part 5' integrally formed at the upper end of the cylinder leg 5, and a hemispherical shell 4' fixed face down on the dish part 5'. A slit 4a provided in the shell 4' along a meridian line allows water to pass through.

A series of male threads 13 are provided on the upper outer circumference of the cylindrical leg 5 to engage with female threads 12 on the inner circumference of the head 2 and conical portion 8 of the cylindrical bushing.

Then, a lock nut 15 having a downwardly facing concave portion 14 that fits into the tapered portion 11 on the top surface of the head of the cylindrical bush described above is screwed onto the male thread 13,
It is located on the lower surface of the hollow head 4. Incidentally, this lock nut 15 may also be a plastic molded product.

To assemble the strainer, use the external thread 13 of the cylinder leg 5.
into the female thread 12 on the inner periphery of the cylindrical bushing, and when the concave part 14 of the lock nut 15 is not yet completely fitted into the tapered part 12 as shown by the broken line in FIG. 1, adjust the horizontality of the hollow head 4. to make it completely horizontal, then tighten the lock nut 15 against the male thread 13.
Turn and move it downward and tighten it tightly against the head of the cylindrical bushing. As a result, the concave portion 14 of the lock nut is completely fitted into the tapered portion 12 from above, and the head 2 of the cylindrical bushing is pressed and fixed to the upper surface of the water collector plate 6, and the male screw 1 of the cylindrical leg of the water collector
3 completely prevents it from loosening with respect to the internal thread 12 on the inner periphery of the cylindrical bush.

(Effects of the invention) According to the invention, a worker can assemble the strainer by adjusting the horizontality of the water collector plate by himself from above the water collector plate. It can also completely prevent it from loosening.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of the strainer according to an embodiment of the present invention in an assembled state, and Fig. 2 is a cross-sectional view of the same cylindrical bushing being inserted into the mounting opening. 2 is the cylindrical part, 3 is the hollow water collector, 4 is the hollow head, 5 is the cylinder leg, 6 is the water collector plate, 6' is the mounting opening, 11 is the tapered part, 1
2 is a female thread on the inner periphery of the cylindrical bushing, 13 is a male thread on the outer periphery of the cylindrical leg, 14 is a recess, and 15 is a lock nut.

Claims (1)

[Scope of Claim for Utility Model Registration] A cylindrical bushing that has a head that comes into contact with the upper surface of the water collection and distribution board and can be inserted into the installation opening of the water collection and distribution board from above, and a hollow head that allows water to flow through it; In the strainer for collecting and distributing water, the strainer is equipped with a hollow water collecting and distributing body having a cylindrical leg whose upper end communicates with the hollow head and extends from the lower surface of the hollow head, and which threadably engages and penetrates the inner periphery of the cylindrical bush. A lock nut having a female thread on the inner periphery of the cylindrical bushing, a tapered part on the upper surface of the head, a male thread on the outer periphery of the cylindrical leg of the water collecting and distributing body, and a recess facing downward to fit with the tapered part. A strainer for collecting and distributing water, characterized by screwing it under a hollow head.