JP6027868B2 - Sand lifting equipment - Google Patents

Description

  The present invention relates to a sand raising device, and more particularly to a sand raising device for sucking up and discharging sand, pebbles, and the like from a sand pit of a sand basin in a water intake facility or the like.

  In the sand basins installed in water intake facilities, sewage treatment facilities, pumping stations, etc., sand collection equipment that collects sand, pebbles, and other sand settling in the bottom of the pond is collected in a sand pit formed on the upstream side of the sand basin. And a sand pumping device for sucking up the collected sand together with water through a sand settling pipe and discharging it from the sand settling basin. A typical sand lifting device is a sand sink pipe with a suction pipe connected to the upper end and a suction nozzle provided at the lower end. As a drive source, the sand is sucked up with the water into the sand settling pipe and discharged into the sand settling tank (see, for example, Patent Document 1).

JP 2007-38208 A

  However, if the size of the sedimentation basin width, that is, the longitudinal direction of the sedimentation pit (the direction perpendicular to the water flow) is large, in order to sufficiently suck up and discharge the sedimentation in the sedimentation pit, It was necessary to install a plurality of sand lifting devices in the direction, which was a factor that increased initial costs and maintenance costs.

  Accordingly, an object of the present invention is to provide a sand raising device that can sufficiently suck up and discharge the sand in the sand pit even when the size of the sand basin is large.

In order to achieve the above object, the sand raising apparatus of the present invention is the sand raising apparatus for sucking and discharging the sand settling in the sand settling pit formed at the bottom of the sand settling basin together with water through the sand settling pipe. The suction pipe is provided at one end of the sand sink suction main pipe having a suction nozzle at the lower end, a T-shaped pipe connecting the branch pipe side to the upper end of the sand sink suction main pipe, and a straight pipe section of the T-shaped pipe. A swivel joint and a cap that closes the other end of the straight pipe part are formed. A sand discharge pipe having a sand lift valve is connected to the swivel joint, and the straight pipe part is connected to the sand sink suction main pipe by a bearing. while supporting at swingable state the lower part of the longitudinal direction of the sand pit, is characterized in that a drive means for swinging the sand suction main.

Further, in the sand raising device of the present invention, the suction nozzle is formed in a conical shape whose lower part is expanded, and a pressure fluid nozzle that ejects pressure fluid from the inside of the suction nozzle toward the bottom surface of the sand pit. It is characterized by having.

  According to the sand raising apparatus of the present invention, the sand settling pipe can be sucked up together with water from a wide range in the longitudinal direction of the sand settling pit by swinging the sand settling pipe by the driving means. Thereby, even when the dimension of the sand basin in the width direction is large, it is possible to reduce the number of sand pumps installed and to reduce the initial cost and maintenance cost of the sand basin. In addition, by providing a pressure fluid nozzle that ejects the pressure fluid from the inside of the suction nozzle toward the bottom surface of the sand settling pit, it is possible to pulverize the set sand in a state that can be sucked up with the pressure fluid, Oscillation of the sand settling pipe can be performed smoothly with a light force.

It is a front view which shows one example of a sand lifting apparatus of this invention. It is a side view similarly. It is explanatory drawing which shows an example of a sand basin.

  First, FIG. 3 shows a basic configuration of a sand basin in which the sand lifting apparatus of the present invention is used. The sand basin 11 having an inflow portion 11a and an outflow portion 11b is upstream of the water flow direction. A sand collecting pit 12 is formed at the bottom of the pond, and a sand collecting device 13 for collecting sand, pebbles, and the like settling at the bottom of the pond toward the sand pit 12 is collected downstream of the sand pit 12. Sand water nozzles 13a are provided over a plurality of rows.

  The sand settling pit 12 is provided with a sand raising device 15 that sucks sand set up in the sand settling pit 12 by the sand collecting device 13 together with water and discharges it into a sand settling tank 14 provided outside the settling pond 11. This sand pumping device 15 includes a sand settling suction pipe 16 having a length extending from the upper part of the sand settling basin 11 to the vicinity of the bottom face of the sand settling pit 12, and a suction pipe 17 provided at the upper end of the sand settling suction pipe 16. A pump 18 and a sand pumping valve 19, a suction nozzle 20 provided at the lower end of the sand settling suction pipe 16, a pressure fluid nozzle 21 for jetting pressure fluid from the inside of the suction nozzle 20 toward the bottom surface of the sand settling pit 12, A pressure fluid supply pipe 22 that supplies pressure fluid to the pressure fluid nozzle 21, a pressure fluid generation source 23 that generates pressure fluid, and a pressure fluid supply valve 24 are provided.

  1 and 2 show one embodiment of the sand raising device of the present invention. The sand settling pipe 16 of the sand raising device 15 shown in this embodiment is located near the bottom of the sand settling pit 12 from the top of the settling basin 11. , A T-shaped pipe 16b having a branch pipe part connected to the upper end of the sand-settled suction main pipe 16a, and a swivel joint provided at one end of the straight pipe part of the T-shaped pipe 16b. 16c and a cap 16d that closes the other end of the straight pipe portion of the T-shaped pipe 16b. The sand discharge pipe 17 having the sand raising valve 19 is connected to the swivel joint 16c.

  The T-shaped tube 16b is rotatably supported by a pair of bearings 25 at both ends of the straight tube portion so as to swingably support the sand sink suction main tube 16a. A swing lever 26 protruding in the direction is fixed, and an electric motor 27, which is a drive means for swinging the lower part of the sand settling suction pipe 16 a along the longitudinal direction of the sand settling pit 12, is connected to the upper end of the swing lever 26. It is connected via a member 28.

  The suction nozzle 20 is formed of a conical (trumpet) conical plate that expands downward, and the pressure fluid nozzle 21 is provided in a state of penetrating the conical plate of the suction nozzle 20. The pressure fluid supply pipe 22 for supplying the pressure fluid to the pressure fluid nozzle 21 is supported on the side of the sand settling suction main pipe 16a by the support means 29 in parallel with the sand settling suction main pipe 16a. The pressure fluid generating source 23 is connected via a flexible tube 22 a corresponding to the swinging of the sand settling suction pipe 16 and the pressure fluid supply valve 24.

  The sand raising device 15 thus formed operates the suction pump 18 and opens the sand raising valve 19, and further activates the pressure fluid generating source 23 and opens the pressure fluid supply valve 24 to open the sand collecting device. The sand collected in the sand settling pit 12 is sucked up by the sand settling suction pipe 16 and discharged from the sand discharge pipe 17 to the sand settling storage tank 14.

  At this time, the electric motor 27 is operated to swing the lower part of the sand settling suction main pipe 16a through the connecting member 28 and the swing lever 26 as shown by the imaginary line in FIG. Sand can be sufficiently sucked in over a wide range (in a direction perpendicular to the flow of water). Thereby, even if the length of the sand settling pit 12 is long, it is not necessary to provide a plurality of sand settling suction pipes as in the conventional case, and the initial cost and maintenance cost of the sand raising device 15 can be reduced.

  In addition, by ejecting the pressure fluid from the pressure fluid nozzle 21 toward the bottom surface of the sand settling pit 12, the set sand set in the sand settling pit 12 can be crushed. While being able to carry out by force, the sedimentation suction pipe 16 can surely suck up and discharge the sedimentation in the sedimentation pit 12.

  As the driving means for swinging the sand settling suction pipe, an appropriate driving means can be adopted as long as the sand settling suction pipe can be swung, and various pressure fluids conventionally used can be appropriately used. Can be used. Also, a well-known drive source can be arbitrarily selected as a drive source for sucking up the sedimentation, and a well-known sand collection device can be arbitrarily selected as the sand collection device.

  DESCRIPTION OF SYMBOLS 11 ... Sand settling basin, 11a ... Inflow part, 11b ... Outflow part, 12 ... Sand settling pit, 13 ... Sand collection apparatus, 13a ... Sand collection water nozzle, 14 ... Sand collection tank, 15 ... Sand collection apparatus, 16 ... Sand collection suction pipe , 16a ... Sand sink suction main pipe, 16b ... T-shaped pipe, 16c ... Swivel joint, 16d ... Cap, 17 ... Sand discharge pipe, 18 ... Suction pump, 19 ... Sand pump, 20 ... Suction nozzle, 21 ... Pressure fluid nozzle, DESCRIPTION OF SYMBOLS 22 ... Pressure fluid supply pipe, 22a ... Flexible pipe, 23 ... Pressure fluid generation source, 24 ... Pressure fluid supply valve, 25 ... Bearing, 26 ... Swing lever, 27 ... Electric motor, 28 ... Connection member, 29 ... Support means

Claims (2)

In the sand raising apparatus for sucking and discharging the sand in the sand settling pit formed at the bottom of the sand settling basin together with water through the sand settling suction pipe , the sand settling suction pipe includes a sand settling suction main pipe having a suction nozzle at a lower end. A T-shaped pipe having a branch pipe connected to the upper end of the sand sink suction main pipe, a swivel joint provided at one end of the straight pipe of the T-shaped pipe, and a cap for closing the other end of the straight pipe is formed between the swivel joint, is connected sediment tube having Agesunaben, the straight pipe portion, can swing along the longitudinal direction of the lower portion of the sand suction main is the sand pit at the bearing And a driving means for swinging the sand settling suction main pipe. The suction nozzle includes a pressure fluid nozzle that is formed in a conical shape having an expanded lower portion and that ejects a pressure fluid from the inside of the suction nozzle toward the bottom surface of the sand pit. Item 1. A sand raising apparatus according to item 1.

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