SU93105A1 - Tip filter tubular well (needle filter) - Google Patents

Description

The existing needle filter designs used to temporarily lower the groundwater level have a valve in the lower part, making it possible to lower them with a wash of water.

A feature of the proposed needle-filter tip is the use of a spring-loaded, spool valve in the filter tip, lowered by means of a wash with a water jet, making it possible not only to lower the needle filter, but also to flush it with a reverse flow of water. Flushing produces a regenerated filter and lengthens its service life, which is important during long-term operation of the installation.

FIG. 1 shows a longitudinal axial section of the needle tip; in fig. 2 is the same in terms of.

The tip consists of a body /, which represents a pipe section, which has an internal thread on one side and, on the other hand, teeth of a 2 router. The body is crossed by two stop bolts 3 on which the cup 4 rests, occupying a certain position in the center of the body. In the glass there is a cylindrical spring 5, carrying the valve plate 6, which is connected by a rod 7 with the spool 8. The spool 8 is a thin-walled cylinder having a number of holes entering the lifting tube .9.

A valve seat 10 is placed in the housing / positioned at a specific location, connected by a thread with the pipe 9 and with the tip body. The valve stroke is limited by the distance from the seat 10 to the bead of the cup 4. The body itself is screwed to a perforated // needle filter by means of a thread.

The action of the needle point filter is as follows.

Before immersing the needle filter in the ground, the valve closes the lower outlet of the pipe 9, and the side openings 12 of the spool 8 coincide with the holes in the pipe 9. When the needle filter is immersed in the ground, water is let in through the pipe 9 for washing. If the water pressure in the pipe is not number 93105

pulls out a given 1 agl, then the valve 6 will not move away from the saddle 10, the water rushes into the side holes, will dampen the entire side surface of the filter and through it will go out. And if the pressure exceeds the set point, the valve will open the lower hole and close the side holes. In this case, the water rushes to the tip milling cutter and blurs the ground the greater, the higher the pressure in the pipe 9. Therefore, the valve in this tip performs zuie functions: opens and closes the course of water in one direction and opens the course of water in another direction. The use of a double-acting valve in the needle filter makes it possible to rinse filters that are in the ground, without picking them up and disassembling them on the ground by briefly changing the direction of water movement.

Subject invention

The tip of the filter tubular well (needle filter), lowered by means of undermining with a stream of water flowing through the hole in the tip, blocked by a valve, characterized in that the valve 15 is filled with a single chopper that overlaps the side openings of the suction pipe, with a spring calibrated to open the valve .ch washing the ground and closing the side holes with the spool when water is supplied under pressure above the predetermined limit and at the opening of the side holes for washing the filter at a pressure less than the specified limit water.

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FIG. 2