JPS6327064B2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" This invention provides a method for installing liquid water pipes at the top end of the pipe when it is unavoidable due to topographical and structural reasons. This invention relates to a new type of liquid multi-cyclone device for the purpose of removing air as well as sand, dust, etc. contained in the liquid.

``Prior art'' In general, a hydrocyclone presses suspended water containing solid particles such as earth, sand and dust from an inlet into a cylindrical main body pipe in a tangential direction to cause a swirling motion, and in addition to drawing out air from the liquid, the above-mentioned Solid particles are collected on the peripheral wall by centrifugal force, rotated down the outer periphery, and separated into a lower stage tank where they are precipitated and discharged, while an overflow pipe is installed in the center of the main cylindrical tube to allow clear water to overflow with air. There was a structure in place that allowed for this.

However, when using river water, etc., in addition to sand with a large specific gravity, if miscellaneous floating objects such as floating dust with a small specific gravity and objects that gather at the center as water resistance due to their shape are mixed in, a simple cyclone as described above is used. It was difficult to deal with this problem using equipment, and it was impossible to separate these floating substances with low specific gravity.

``Means for Solving the Problems'' Therefore, this invention is a new hydrocyclone device for solving the above problems, in which water containing not only solid particles but also miscellaneous floating contaminants is introduced from the tangential direction of the main cylindrical tube. is sucked up by a pump or connected to a discharge pipe, and a swirling motion is caused by a backflow, thereby causing solid particles with a large specific gravity to be collected on the peripheral wall by centrifugal force, and subjected to primary swirling, descent, and sedimentation separation. Furthermore, a water overflow pipe is installed vertically in the center of the main cylindrical pipe of the hydrocyclone, and a cylindrical pipe with holes for water sampling of approximately the same length as the main cylindrical pipe is installed concentrically around the outer periphery of this spout. A large number of vertical swirl plates are installed radially from the center to form a large number of box shapes.

A large number of boxes made up of these vertical vortex plates are open on the outside, and an upward vortex is always generated in the opposite direction to the main flow. A small eddy current is generated inside each box-shaped box, in which objects with a large specific gravity settle, and objects with a small specific gravity and solid objects with a shape that creates water resistance are promoted to float. Therefore, the above-mentioned perforated cylindrical tube acts as a filter to enable secondary separation of miscellaneous solids by this device, and this perforated cylindrical tube has a sufficient opening area. Flowing water flows into the interior through the opening, and only clear water flows out from the mouth of the overflow pipe. As described above, the present invention is a novel liquid multi-cyclone device that uses this new mechanism to almost completely separate and discharge impurities in flowing water through the primary and secondary solid separation actions.

"Embodiment" An embodiment of the present invention will be described below based on the drawings. A cyclone body is provided in which the lower half of a vertical cylindrical tube 2 is formed into an inverted conical tube 3, and the body is a closed type whose upper part is covered with a lid 4. Alternatively, it may be an open type without a lid, with a liquid inlet 5 attached to the upper tube wall in the direction of the cutting line of the cylindrical tube 2, and an overflow tube having a spout 6 at an appropriate height in the center of the cylindrical tube 2 of the main body. 7 is vertically installed, and its lower end penetrates the outer wall of the inverted conical tube 3 at the bottom of the main body, and around the overflow tube 7 is provided a perforated cylindrical tube 8 having a large number of holes 9 in the peripheral wall. Furthermore, on the outer periphery of this perforated cylindrical tube 8, 12 vertical swirl plates 10 are installed radially from the center, and an inverted conical tube 3 at the lower end of the main body is provided.
A drain pipe 11 and a drain port 12 are provided at the tip.

Note that FIGS. 5 and 6 show examples of an open type without a lid, and numeral 13 indicates a spillage outlet.

``Function'' The liquid multi-cyclone device of the present invention configured as described above first processes water containing sand and miscellaneous impurities that flows in from the inlet 5 attached to the upper end of the main cylindrical tube 2 in the tangential direction. The flow velocity gives a swirling motion (arrow a), and this centrifugal force mainly collects solid particles such as sand with a large specific gravity on the peripheral wall, and causes them to swirl, descend, and settle into the inverted conical tube 3 at the bottom for the first separation. Do this.

These settled sand grains are discharged to the outside by occasionally opening the discharge port 12 at the lower end.

In addition, fine sand with low specific gravity and floating dust, etc., swirl and float together with the water and rise.
A large number of box-shaped multi-cyclones are formed, and small upward vortices (arrow b) in the opposite direction to the main flow are generated within the box shape between each vortex plate, and those with relatively large specific gravity settle here. Floating of solid objects with low specific gravity and shapes that create water resistance is facilitated by the eddy current.

The solids are therefore subjected to a second separation by means of a vortex plate and a perforated cylindrical tube 8.
Only clear water acts as a filter and flows into the interior through the opening 9, is sucked into the spout 6 of the overflow pipe 7, and flows out from the outlet of the overflow pipe 7 toward the pump.

"Effects of the Invention" As described above, the present invention has a small double cyclone device in which a large number of small multi-cyclones each consisting of a vortex plate and a perforated cylindrical tube are combined inside a single hydrocyclone. The centrifugal force and rising eddy current can almost completely remove and separate dirt and floating contaminants in the flowing water, and only clear water can be sent from the overflow pipe, and is limited to closed type systems. This is a new type of liquid multi-cyclone device that can be used as a sedimentation tank with an open top depending on the application.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a longitudinal sectional view of the device, FIG. 2 is a sectional view taken along line A--A in FIG. 1, and FIG. 3 is a longitudinal sectional view of the cylindrical portion showing the action of flowing water. 4 is an enlarged partially cutaway perspective view showing the action of the vertical swirl plate and the perforated cylindrical tube, FIG. 5 is a vertical cross-sectional view of an embodiment of the open top type, and FIG. FIG. ... Cyclone body, 2 ... Cylindrical tube, 3 ...
Inverted conical pipe, 4... Lid, 5... Inlet, 6... Spout, 7... Overflow pipe, 8... Perforated cylindrical pipe, 9...
Opening hole, 10... Vertical swirl plate, 11... Drain pipe, 1
2...Discharge port, 13...Spill water discharge port, a...Water flow swirling movement, b...Small vortex flow.

Claims (1)

[Claims] 1. A cyclone body is provided in which the lower half of a vertical cylindrical tube is formed into an inverted conical tube, and the main body is either a closed type or an open type whose upper part is covered with a lid, and a liquid inlet is provided in the tube wall at the upper end in the direction of the cut line of the tube. An overflow pipe with a spout at an appropriate height is installed in the center of the cylindrical pipe of the main body, and its lower end penetrates into the outer wall of the lower part of the main body, and a large number of holes are installed around the overflow pipe. A perforated cylindrical pipe is installed around the peripheral wall, and an appropriate number of vertical swirl plates are installed radially from the center on the outer periphery of the perforated cylindrical pipe. It consists of a mouth, and in addition to the primary separation of solids due to the centrifugal force of the cyclone action, the secondary separation of solids in the liquid is promoted by a large number of small vortices caused by the entrained action of a large number of vertical swirl plates. A liquid multi-cyclone device using a vertical eddy current plate.