JPS5851925Y2 - Nozzle for filtration equipment - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a nozzle for a filtration device used in a filtration device.

In general, a filtration device includes a liquid tank 1, a raw water introduction pipe 2 that leads raw water to a filtration layer, and a filtrate extraction pipe that takes out the filtrate filtered in the liquid tank 1 and has a valve 3A, as shown in Fig. 1. 3, a filtrate tank 4 connected to the open end of the filtrate extraction pipe 3, and one end connected to the filtrate tank 4 via a backwash pump 5A to eliminate clogging of the filtration layer 1 by backwashing. It consists of a wash water inlet pipe 5 having an end communicating with the filtered water take-out pipe 3 and having a valve 5B.

Here, the liquid tank 1 is provided with a raw water inlet part 6 communicating with the raw water introduction pipe 2 on the upper outer wall, and this raw water inlet part 6 is connected to a water sprinkling pipe 7 for sprinkling raw water in the liquid tank 1 .

A horizontal support plate 8 is provided in the lower part of the interior of the liquid tank 1, and a wave layer 9 made of gravel and sand is stacked on top of the support plate 8 in a layered manner.

Further, a nozzle 10 is attached within the wall thickness of this support plate 8, and this nozzle 10 guides the filtered water by permeating the filter layer 9 to a water collection chamber 11 isolated by the support plate 8. It's buzzing.

Further, a filtrate outlet section 12 is provided at the lower end of this liquid tank 1, and this filtrate outlet section 12 is connected to one end of the filtrate extraction pipe 3 to transfer the filtrate from the liquid tank 1 to the filtrate tank 4. It is released into

Here, as shown in FIG. 2, the nozzle 10 used in the conventional filtration device has a bottomed cylindrical cap portion 1 having a plurality of slit portions 13 in its wall thickness through which filtered water flows.
4 and the support plate 8 that extends from the lower end of the cap portion 14.
a flange portion 15 that comes into contact with the upper surface of the flange portion 1;
Threaded portion 1 screwed into the support plate 8 provided at the lower end of 5
It consists of 6 and.

Nozzle 10 used in such a conventional filtration device
must be screwed to the support plate 8, and therefore it is necessary to provide a large number of screw holes in the support plate 8, and the screwing operation requires a considerable amount of time.

This invention was made in order to eliminate the above-mentioned conventional drawbacks, and the object is to provide a nozzle for a filtration device that is easy to install and does not need to be removed.

This invention includes a leg part that is inserted into a nozzle mounting hole formed in a support plate of a filtration device, a flange part that is provided at the upper end of the leg part and whose lower surface abuts the upper surface of the support plate;
In the nozzle for a filtration device, the cap part is provided at the upper end of the flange part, and the filtrate can be conducted to the internal space of the nozzle. an insertion part having an outer dimension that approximately fits into the mounting hole; and an insertion part connected to the lower end of the insertion part, with at least its upper end surface having a larger diameter than the inner diameter of the nozzle mounting hole so that the nozzle can pass through the nozzle mounting hole. a locking part whose diameter can be reduced, and a cutout slit that vertically divides the leg part, and when the leg part is inserted into the support plate, the flange part The support plate is held between the lower surface and the upper end surface of the locking portion.

Examples of this invention will be described below with reference to FIGS. 4 to 6.

The nozzle 20 for a filtration device according to this invention has an outflow space 20A of filtered water inside, and has a cap part 21 and a flange part 2.
2 and a leg portion 23.

Like the conventional nozzle 10 for a filtration device, the cap part 21 is a bottomed cylinder having a slit part 21A on the side wall as a filtered water inlet.

A flange portion 22 is provided at the lower end of the cap portion 21, the entire circumference of the flange portion 22 protrudes outward, and the lower surface of the flange portion 22 is in contact with the upper surface of the support plate 8.

Further, a leg portion 23 is projected downwardly from the lower end of the flange portion 22, and this leg portion 23 is divided into four parts by a cutout portion 24 extending from the lower surface of the flange portion 22 to the lowest end of the leg portion 23, and each leg portion is divided into four parts. The portion 23 is an elastic column that is cantilevered at its base end and can be bent in the rearward direction.

Each of the legs 23 divided in this way consists of an insertion section 25 and a locking section 26 at its lower end.

The insertion portion 25 has an outer diameter that can be inserted and fitted into the nozzle mounting hole of the support plate 8, and has a height equal to the wall thickness of the support plate 8. The tip locking portion 26 protrudes to the opposite side when it is pressed.

The locking part 26 has a diameter enlarged at the lower end of the insertion part 25, and when the insertion part 25 is inserted and fitted into the thickness of the support plate 8, the locking part 26 holds the support plate 8 from above together with the lower surface of the flange part 22. It is designed to be held in place.

Due to the elasticity of the leg portion 23 in the radial direction, the locking portion 26 can be expanded and contracted to such an extent that the leg portion 23 can pass through the hole when the leg portion 23 is attached to and removed from the nozzle hole of the support plate 8.

Further, the outer periphery of the locking portion 26 is formed with a tapered portion 27 that is reduced downward, so that the nozzle of the support plate 8 of the leg portion 23 can be easily inserted into the hole.

The operation of the above embodiment will be explained below.

When attaching this nozzle 20 for a filtration device to the support plate 8 of the filtration device, when the leg portion 23 is pressed downward into the nozzle attachment hole of the support plate 8, the leg portion 23 is attached to the tapered portion 27.
The locking part 26 is also inserted while bending radially inward from the support plate 8, and the diameter of the nozzle attachment of the support plate 8 is reduced to be equal to the inner diameter of the hole, and the nozzle attachment passes through the hole, so that the insertion part 25 is completely inserted into the support plate. 8, the diameter of the leg portion 23 is expanded again due to its elasticity, and the locking portion 26 protrudes radially from the lower surface of the support plate 8 and clamps the support plate 8 together with the lower surface of the flange portion 22.

Furthermore, when backwashing the filtration device, the legs 23 of the filtration device nozzle 20 are expanded outward by the water pressure of the backwash water, and the support plate 8 is more securely held between the lower surface of the flange portion 22 and the locking portion 26. and the nozzle 20 for the filtration device to the liquid tank 9 side.
Prevents removal.

In addition, when a mixture of water and air is sent from below the support plate 8 to the sand layer side during backwashing, the air bubbles smoothly reach the nozzle through the notch 24, so an air layer (air pocket) is formed below the support plate 1. Never.

In the above embodiment, the notch 24 provided in the leg 23 is
The strength of the flange portion 22 is increased by not cutting out the flange portion 22 by making it separate and independent from the slit portion 21A provided in the cap portion 21, but this notch portion 24 is used to support the leg portion 23. It is sufficient that it can be substantially expanded and contracted when attached to and removed from the plate 8. Therefore, if the strength problem can be overcome, this notch 24 may be provided continuously with the slit portion 21A of the cap portion 21. There may be.

Further, in the above embodiment, the locking part 26 provided with the leg part 23 is constructed integrally with the leg part 23, but this locking part 26 can be substantially expanded and contracted when the leg part 23 is attached to and detached from the support plate 8. It is sufficient that the supporting plate is clamped together with the lower surface of the flange portion 22. Therefore, the locking portion 26 may be formed by providing another independent spring mechanism on the leg portion 23.

As described above, this invention includes a leg part that is inserted into a nozzle mounting hole formed in a support plate of a filtration device, and a leg part that is provided at the upper end of the leg part so that its lower surface abuts the upper surface of the support plate. In a nozzle for a filtration device, which has a flange portion and a cap portion provided at the upper end of the flange portion, and is capable of conducting filtered water to an internal space of the nozzle, the leg portion has a cap portion connected to the flange portion. an insertion part having outer dimensions that substantially fits into the nozzle mounting hole, and an insertion part connected to the lower end of the insertion part and having at least an upper end surface having a larger diameter than the inner diameter of the nozzle mounting hole; a locking part whose diameter can be reduced so that the leg can pass through the support plate, and a cutout slit that vertically divides the leg, and when the leg is inserted into the support plate, The lower surface of the flange portion and the upper end surface of the locking portion sandwich the support plate, so that the nozzle for a filtration device is easily installed, does not need to be removed, and can prevent the generation of air pockets. It has the effect of being able to

[Brief explanation of drawings]

Fig. 1 is a piping system diagram showing a general filtration device, Fig. 2 is a side view showing a conventional nozzle for a filtration device, Fig. 3 is a bottom view of Fig. 2, and Fig. 4 is a filtration system according to this invention. FIG. 5 is a bottom view of FIG. 4, and FIG. 6 is a sectional view taken along line IV--IV of FIG. 4. 20... Nozzle for filtration device, 21...
Cap part, 22...Flange part, 23...
... Leg part, 25 ... Insertion part, 26 ...
・Latching part.

Claims (1)

[Scope of utility model registration request] A leg part that is inserted into a nozzle mounting hole formed in a support plate of a filtration device, a flange part provided at the upper end of this leg part and whose lower surface abuts the upper surface of the support plate, and a flange part of this flange part. In a nozzle for a filtration device, the nozzle has a cap portion provided at an upper end, and is configured to allow filtrate to flow into an internal space of the nozzle, and the leg portion has a cap portion connected to the flange portion and approximately connected to the nozzle mounting hole. an insertion portion having outer dimensions that fit together;
a locking part that is connected to the lower end of the insertion part and has at least an upper end surface that has a larger diameter than the inner diameter of the nozzle mounting hole and can be reduced in diameter so that it can pass through the nozzle mounting hole;
is provided, and a cutout slit is provided that divides the leg in the vertical direction, and when the leg is inserted into the support plate, the lower surface of the flange portion and the upper end surface of the locking portion are connected to the support plate. A nozzle for a filtration device, which is characterized by holding a .