CN204919666U - Heavy -calibre sump pit shaft bottom whirl sediment outflow device - Google Patents

Abstract

The utility model relates to a swirl sand discharge device at the bottom of a large-diameter water collection well, comprising a bottom support, a swirl sand discharge circulation pipe, an air intake pipe, a sand discharge pipe, and a sand discharge pump; the bottom support is pre-buried and arranged at the bottom of the well Around the well wall of the well, the annular swirl sand discharge circulation pipe is installed and fixed on the well bottom bracket. During the well cleaning operation of the utility model, compressed air is supplied into the air supply pipe, and the swirl sand discharge circulation pipe allows the bottom water to form a circulation, so that the sand particles are concentrated to the center of the bottom of the well, and at the same time, the sand discharge pump is turned on to discharge sand while circulating, and Complete the whole process of well washing and sand removal. The structure is simple, easy to operate, greatly improves the efficiency of well washing and sand discharge, fast operation speed, and can achieve better economic benefits and prolong the service life of large diameter water collection wells.

Description

Bottomhole cyclone sand removal device for large diameter water collection well

technical field

The utility model relates to a sand-discharging device for a water-collecting well, in particular to a sand-discharging device for swirling at the bottom of a large-diameter water-collecting well.

Background technique

At present, most of the water-collecting wells in water supply projects are located on sandy pebbles, and the water intake layer is the pore water of Quaternary sandy pebbles. Most of them are constructed by caisson method or cast-in-place reverse method. When these wells are put into use, there will be continuous accumulation of sand particles in the wells. After a certain number of years of operation, it is inevitable to wash the wells to wash out the sand. However, due to the large bottom area of large-diameter wells, the sand particles are not concentrated. At present, it is not easy to quickly remove the sand at the bottom of the hole by using the air compressor to wash the well and remove the sand. Silt all around.

Utility model content

In order to overcome the problem of the traditional water collection well sand discharge device, the utility model provides a large diameter water collection well bottom swirl sand discharge device.

The technical solution adopted by the utility model to solve the technical problems is: the swirl sand discharge device at the bottom of the large-diameter water collection well, including the bottom support, the swirl sand discharge circulation pipe, the air intake pipe, the sand discharge pipe, and the sand discharge pump; The bottom-hole support is pre-buried and arranged around the well wall at the bottom of the well, and the annular swirl sand-discharging circulation pipe is installed and fixed on the bottom-hole support to be horizontally arranged. The air flow nozzle, the included angle between the air flow nozzle and the tangential direction of the outer circle of the swirl sand discharge circulation pipe is 30°-40°, at the same time, the air flow nozzles are arranged horizontally and downwardly, and the depression angle of the downwardly inclined airflow nozzles is in line with the swirl angle. The included angle of the horizontal direction of the flow sand discharge circulation pipe is 15°～20°; one end of the air intake pipe is connected to the swirl flow sand discharge circulation pipe, and the other end of the air intake pipe extends out of the wellhead and is connected to an air compressor. One end of the sand discharge pipe goes deep into the center of the well bottom, and the other end extends out of the well head; one end of the sand discharge pipe is equipped with a sand discharge pump at the bottom of the well.

The diameter of the cyclone sand discharge circulation pipe is 40-60cm smaller than the inner diameter of the water collection well.

The diameters of the ring-shaped swirl sand discharge circulation pipe and the air inlet pipe are 1.5-3 inches.

The air volume of the air compressor connected to the air inlet pipe is not less than 9m3/min, and the air pressure is not less than 0.6Mpa.

The utility model forms swirling flow at the bottom of the well through compressed air, so that the sand particles are concentrated at the relative central position of the bottom of the well, thereby greatly improving the efficiency of sand discharge.

The beneficial effect of the utility model is that, during the well cleaning operation, the pressure air is supplied to the air supply pipe to form a circulation at the bottom of the well, so that the sand particles are concentrated to the center of the well bottom, and at the same time, the sand discharge pump is turned on to discharge sand while circulating and complete the washing. The whole process of well sand removal. The structure is simple, easy to operate, greatly improves the efficiency of washing and sand removal, and has a fast operation speed, and can achieve better economic benefits and prolong the service life of large-diameter water collection wells.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is a structural schematic diagram of the swirl sand discharge circulation pipe of the utility model;

FIG. 3 is a top view of FIG. 2 .

Parts and numbers in the picture:

1-bottom support; 2-swirl flow sand discharge circulation pipe; 3-intake pipe; 4-sand discharge pipe; 5-sand discharge pump; 6-air flow nozzle.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

As shown in Figures 1 to 3, the large-diameter water collection well bottom swirl sand discharge device includes a bottom support 1, a swirl sand discharge circulation pipe 2, an air intake pipe 3, a sand discharge pipe 4, and a sand discharge pump 5; The bottom hole bracket 1 described above is pre-buried and arranged around the well wall at the bottom of the well, and the annular swirl sand discharge and circulation pipe 2 is installed and fixed on the bottom hole support 1 in a horizontal setting. The inside of the swirl sand discharge circulation pipe 2, etc. The air flow nozzles 6 are arranged at a distance from the air flow nozzles 6, and the included angle between the air flow nozzles 6 and the tangential direction of the outer circle of the swirl sand discharge circulation pipe 2 is 30°-40°. The included angle between the depression angle of the airflow nozzle 6 and the horizontal direction of the swirl sand discharge circulation pipe 2 is 15°～20°; Out of the wellhead and connected with an air compressor, one end of the vertical sand discharge pipe 4 goes deep into the center of the well bottom, and the other end stretches out of the wellhead; the sand discharge pipe 4 is provided with a sand discharge pump 5 at one end of the well bottom.

The diameter of the cyclone sand discharge circulation pipe 2 is 40-60 cm smaller than the inner diameter of the water collection well.

The diameters of the annular swirl sand discharge circulation pipe 2 and the air inlet pipe 3 are 1.5-3 inches.

The air volume of the air compressor connected to the air intake pipe 3 is not less than 9m3/min, and the wind pressure is not less than 0.6Mpa.

Implementation process: the air compressor sends compressed air to the swirl sand discharge circulation pipe 2 through the intake pipe 3, and sprays it out through the air flow nozzle 6, the water at the bottom of the well forms a continuous and stable swirl flow, and the sand particles in the water are concentrated in the bottom of the well Relative to the central position, the sand discharge pump 5 discharges sand grains out of the well through the sand discharge pipe 4, so as to realize the purpose of fast and efficient well washing and sand discharge.

Claims (4)

1. A large-caliber water collection well bottom hole swirl sand discharge device, characterized in that it includes, bottom hole support (1), swirl sand discharge circulation pipe (2), air intake pipe (3), sand discharge pipe (4 ), a sand discharge pump (5); the bottom hole support (1) is pre-buried and arranged around the well bottom wall, and the annular swirl sand discharge circulation pipe (2) is installed and fixed on the bottom hole support (1) It is arranged horizontally, and the inner side of the swirl sand discharge circulation pipe (2) is equidistantly provided with air flow nozzles (6), and the angle between the air flow nozzles (6) and the tangential direction of the outer circle of the swirl sand discharge circulation pipe (2) at the same time, the air flow nozzles (6) are arranged horizontally and downwardly inclined, and the angle between the depression angle of the downwardly inclined air flow nozzles (6) and the horizontal direction of the swirl sand discharge circulation pipe (2) 15°～20°; one end of the air inlet pipe (3) is connected to the swirl sand discharge circulation pipe (2), and the other end of the air inlet pipe (3) extends out of the wellhead and is connected to an air compressor to discharge sand vertically One end of the pipe (4) goes deep into the center of the well bottom, and the other end extends out of the wellhead; the sand discharge pipe (4) is provided with a sand discharge pump (5) at one end of the well bottom. 2. The large-diameter water collection well bottom swirl sand discharge device as claimed in claim 1, characterized in that, the The diameter of the swirl sand discharge circulation pipe (2) is 40-60cm smaller than the inner diameter of the water collection well. 3. The bottom-hole swirl sand discharge device for large-caliber water collection wells according to claim 1, characterized in that the diameters of the circular swirl sand discharge circulation pipe (2) and the air inlet pipe (3) are 1.5 ~3 inches. 4. The bottom-hole swirling sand discharge device of large-diameter water collection wells according to claim 1, characterized in that the air volume of the air compressor connected to the air inlet pipe (3) is not less than 9m3/min, and the wind pressure is not less than 0.6Mpa.