RU2816452C1 - Hydraulic structure piezometer filter - Google Patents

Abstract

FIELD: hydraulic engineering.

SUBSTANCE: invention relates to hydraulic structures and can be used to prevent the ingress of soil particles into a piezometer, and can also be used to measure the level of groundwater in construction, in particular in the field of engineering surveys for construction, observation wells, drinking water supply wells. Proposed device comprises metal tube and ring with foam metal sponge soldered thereto. Conical tip is soldered on the lower end of the filter. Diameters of metal pipe and filter do not exceed diameter of conical tip. To clean the filter from clogging, an ultrasonic cleaner placed in the cavity of the filter is used. Filter is made of a solid metal sponge with an inner hole.

EFFECT: simplified design, higher reliability.

1 cl, 3 dwg

Description

The invention relates to hydraulic structures and can be used to prevent the entry of soil particles into a piezometer designed for measuring groundwater level in construction, in particular in the field of engineering surveys for construction, observation wells, and drinking water supply wells.

The invention is well known: well filter No. 2258131 C1, E21B 43/08, publ. 08/10/2005. A well filter containing a perforated pipe and a filter element, made with a decrease in pore size in the radial direction from the outer surface to the inner one and installed coaxially with the outer surface of the perforated pipe, characterized in that the filter element is made of foam metal with a spatial cellular frame consisting of polyhedral cells with permeable edges, and with the possibility of forming a natural continuous sand filter inside the foam metal from precipitated particles, mechanically interlocked with the faces and edges of the cellular frame stochastically oriented in space. The disadvantage of this invention is the use of three layers of foam metal, which makes the design more expensive and low-tech.

A typical design of a lowering piezometer is known (No. 2787745 C1, E21B 47/047 (2022.08), G01N 33/24 (2022.08), publ. 01/12/2023), including a metal pipe buried in the ground with a perforated water intake part. The barrel of the perforated metal pipe is wrapped in a foam metal filter. The filter is located along the height of the entire perforated pipe. The disadvantage of the proposed design is the presence in the filter part of a perforated pipe, on top of which a foam metal filter is placed, which complicates the removal of soil particles.

The purpose of the invention is to simplify the design and increase the reliability of the filter.

The problem was solved as follows: The piezometer filter of a hydraulic structure is made of foam metal sponge, the diameter of the pipe and filter does not exceed the diameter of the disk with a conical tip. To clean the filter from clogging, an ultrasonic cleaner placed in the filter hole is used. A ring is used to attach the foam metal sponge filter to the pipe. The filter can be made of a solid metal foam sponge with an internal hole, or from a single layer of metal foam sponge, or from several layers of sheet metal foam sponge.

In fig. Figure 1 shows a detail of the piezometer filter of a hydraulic structure, which is made of a solid foam metal sponge 3 (the thickness is selected for the type of soil) the diameter of which coincides with the diameter of the metal pipe 1 and the internal cavity 5 intended to accommodate the ultrasonic cleaner 6. Attaching to the end of the metal pipe barrel, is carried out as follows: ring 2 is soldered to the pipe to increase the contact area with the foam metal sponge for a high-quality soldered seam. To ensure the integrity of the foam metal sponge when immersed, a tip 4 is installed at the end.

In fig. Figure 2 shows a detail of the piezometer filter of a hydraulic structure, which is made of a metal pipe 1 and a bent metal foam sponge 3 (the thickness is selected for the type of soil), the diameter of which coincides with the diameter of the metal pipe 1, with an internal cavity 5 designed to accommodate an ultrasonic cleaner 6. K Ring 2 is welded to the end of the metal pipe barrel to increase the contact area with the foam metal sponge plate for a high-quality soldered seam. To ensure the integrity of the foam metal plate during immersion, a tip 4 is installed at the end.

In fig. Figure 3 shows a detail of a piezometer filter for a hydraulic structure made of a metal pipe 1 and a bent sheet of foam metal wrapped in several layers (the thickness is selected for the type of soil) 3, the outer diameter of which coincides with the diameter of the metal pipe 1, with an internal cavity 5 designed to accommodate an ultrasonic cleaner 6. Ring 2 is welded to the end of the metal pipe barrel to increase the contact area with the foam metal sponge for a high-quality solder seam. To ensure the integrity of the metal sponge when immersed, a tip 4 is installed at the end.

Immersion of the filter is carried out as follows. A well with a diameter equal to the diameter of the disk of the conical tip 4 is drilled onto the soil surface. The ends of the first section of pipe 1, the metal ring 2 and the foam metal sponge filter 3 are soldered in advance. The first section of pipe with a filter and a conical tip 4 is installed vertically into the well down to the bottom of the well. As soon as the filter with the first section of the metal pipe is completely crushed, if its length is not enough, then the next section is installed on it. Subsequent and upper sections are arranged on site and depend on the depth of the well. An ultrasonic cleaner 6 is lowered into the internal cavity 5.

Like the prototype, the piezometer design contains a metal pipe and a filter. The filter in the inventive device is located at the end of the pipe barrel. In this case, the diameter of the filter does not exceed the diameter of the pipe barrel.

To clean the filter from clogging (siltation), it is advisable to use ultrasonic cleaning. At the lower end of the foam metal sponge, a conical tip is soldered, which prevents deformation of the foam metal sponge when it is immersed in the well. In a particular case, a solid foam metal sponge, or a plate of foam metal sponge, or a sheet of foam metal sponge, wrapped in several layers, can be used as a filter; the end is soldered to a metal ring, which in turn is soldered to the barrel of a metal pipe. When using one plate of foam metal sponge, the side surfaces of the plate are soldered.

The given technical characteristics of the invention make it possible to positively judge its manufacturability, material consumption, labor intensity and increased resource.

Claims (1)

A piezometer filter for a hydraulic structure, including a series-connected metal pipe and a ring to which a foam-metal sponge filter is soldered, with a cone tip soldered at the lower end of the foam-metal sponge filter, the diameters of the metal pipe and filter do not exceed the size of the diameter of the cone tip, to clean the filter from clogging An ultrasonic cleaner is used, placed in the filter cavity; the filter is made of a solid metal foam sponge with an internal hole.