RU2315205C1 - Torque-flow pneumatic pumping unit - Google Patents

Abstract

FIELD: mining industry.

SUBSTANCE: invention relates to pump building, namely, to pumps handling liquids with solidified sediments, hard and large-size inclusions, for instance, those operating in mine sumps, drying settlers and digging trenches in wet soils. Proposed pumping unit includes drive, housing with suction and delivery branch pipes and torque-flow wheel installed on shaft of drive. Shaft of drive is provided with shaft-insert with conical ripper with longitudinal teeth installed in tail part of shaft-insert. Ripper is located before suction branch pipe, and the latter is furnished with rigid frame base. Base is made in form of spatial truncated pyramid, and it consists of tilted side ribs connected by horizontal cross-members installed with clearance relative to each other. Invention provides preliminary preparation of liquid to be pumped before taking in by creating homogeneous suspension, crushing of consolidated bottom sediment and hard inclusions and forming torque flow of liquid around ripper providing more effective getting of liquid onto working wheel of pumping unit.

EFFECT: increased efficiency of operation of torque-flow pneumatic pumping unit.

1 dwg

Description

The invention relates to the field of pump engineering and can be used in the design of free-vortex pumps to expand their technological capabilities when pumping liquids of various densities and viscosities, with compacted sediments, solid and large inclusions.

The unit is designed for pumping liquids in local drainage shafts from sumps of shafts equipped with multi-rope lifting devices when driving horizontal mine workings and slopes, as well as for draining sedimentation tanks, reservoirs, canal ditches and digging trenches in swampy and moistened soils.

Known free-vortex pump (Aut. St. USSR No. 670761, IPC 3 F04D 7/04, 1981), comprising a housing with a suction and discharge nozzles and an impeller mounted thereon, separated from the working cavity by a protective element made in the form a disk with flat blades and mounted on the shaft with the possibility of rotation.

The proposed pump design is not effective for pumping liquids with compacted sediments and large inclusions. When the pump is operating in its working chamber, the fluid will slip relative to the impeller blades during movement, since the disk with flat blades on the shaft will randomly turn uncontrollably and inhibit its entry into the pump discharge pipe. With this operation of the impeller of the pump, its performance will significantly decrease and the energy intensity of the fluid pumping process will increase.

Known pump unit (Ukrainian patent No. 20257A, IPC 6 F04D 13/08, 1998), intended for use in pump units immersed in containers with the location of the electric motor outside the container. The pump unit contains a housing located in the tank with the pumped liquid and mounted on its holding column, an impeller located in the housing, connected to the motor located outside the tank by means of a shaft conduit consisting of shafts connected by threaded couplings and mounted in sliding bearings. To prevent unwinding of the shafts during unit starts with rotation in the opposite direction, holes were made in the shafts and, accordingly, in the couplings, into which crackers fixing them were inserted, and the couplings were locked on both sides by nuts.

The proposed pump unit has limited use - only for pumping liquids from reservoirs such as tanks, tanks and other containers. The claimed design of the pump unit is aimed mainly at improving the elements that transmit torque from the electric motor to the impeller for any phasing of the electric motor. Its use in the submersible version is completely excluded, since the design does not have protective elements from getting the pumped liquid onto the electric motor. The intake part of the pumping unit is capable of pumping only clean liquids and fine suspensions.

The closest in technical essence to the claimed device is a submersible pump selected as a prototype (Ukrainian patent No. 18996A, IPC 5 F04D 13/08, 1997), intended for use in submersible pumps with a gas-filled electric motor. The submersible pump contains a vane pump separated by a seal and a gas-filled electric motor mounted in the housing, a current lead and a chamber for collecting leaks of the pumped liquid, in communication with the cavity of the electric motor. The motor housing is made in the form of an inverted vessel, sealed with a deaf upper part, and the current supply is brought down through the leakage collection chamber, which is made with a height exceeding the height of rise in the level of liquid leakages in it when the gas is compressed with the maximum possible liquid pressure in front of the chamber. To reduce the height of the chamber, it is equipped with a nipple with the possibility of pumping it before installing the pump with gas with excess pressure. The design of the submersible pump is mainly aimed at improving the reliability of its operation due to the protection of the electric motor from the ingress of pumped liquid.

A disadvantage of the known device is the following: a submersible pump is designed for pumping clean liquids and liquids with fine suspensions, it is not suitable for pumping liquids with different densities and viscosities, since it does not have structural elements for pre-treatment of the liquid entering the pump in front of the intake part. When pumping liquids with silty and clay (viscous) suspensions, the suction pipe of the pump will become clogged, and the pump will decrease its performance. Pumping liquids with compacted sediments, with large and solid inclusions from the bottom of sedimentation tanks or pits is generally impossible.

The basis of the invention is the task of increasing the efficiency of the unit due to the preliminary preparation of the pumped liquid before its intake by creating a homogeneous suspension, as well as crushing caked bottom sediment and solid inclusions. In addition, the formation of a vortex fluid flow around the baking powder contributes to an increase in the operating efficiency of the unit, which ensures a more efficient liquid flow onto the impeller of the unit.

The problem is achieved in that in a free-swirl pump unit including a drive, a housing with a suction and discharge nozzles and a free-swirl wheel mounted on the drive shaft, the drive shaft is equipped with an insert shaft with a conical baking powder mounted on its rear part located in front of the suction nozzle and the suction pipe is equipped with a rigid frame base made in the form of a spatial truncated pyramid and consisting of side inclined ribs connected by m each other with horizontal cross members installed relative to each other with a gap.

The location of the conical baking powder with longitudinal teeth on the rear of the insert shaft in front of the suction nozzle of the unit creates favorable conditions for preparing the hydraulic mixture for pumping, namely: compacted bottom sediments and solid inclusions with a conical baking powder are crushed; large and solid inclusions by centrifugal force are ejected from the suction zone through the gaps between the cross members of the frame base and thus the cleaned and crushed hydraulic mixture enters the suction pipe of the unit, which increases the efficiency of the unit. In addition, in the process of work around the conical baking powder is formed a vortex flow of the slurry, which contributes to a more efficient liquid flow on the impeller of the unit.

The conical shape of the baking powder and the presence of longitudinal teeth on it creates favorable conditions for cleaning the liquid from inclusions and, accordingly, for increasing the main indicators of the purpose of the unit: its performance, pressure stability, immersion stability during its rotation and progressive introduction into compacted sediments under its own weight; bottom parts of reservoirs and reservoirs.

The invention is illustrated in the drawing, which shows a longitudinal section of the inventive device.

A free-vortex pneumatic pump unit consists of a pneumatic actuator 1 mounted on a housing 2 with a suction 3 and a delivery 4 nozzles by means of fasteners 5. An insert shaft 6 is mounted on the pneumatic actuator shaft 1, mounted on it with a pin 7 and connected by a seat 8 with a freely swirl impeller 9. A cone baking powder with longitudinal teeth 10 is installed on the rear of the insert shaft 6. A pressure pipe 11 is connected to the discharge pipe 4. A rigid frame is attached to the intake pipe 3 the base 12 is formed as a space of a truncated pyramid, and consists of the inclined side edges 13 and horizontal beams 14. The compressed air supply unit 15 to actuator fitting 1 is connected by a hose 16 from a compressor or pneumatic enterprise. To reduce the noise level during operation of the unit, silencers 17 are installed on the pneumatic actuator 1.

The device operates as follows. The unit is delivered to the place of operation by road. A hose 16 is connected to the pneumatic actuator 1 to the fitting 15 to supply it with compressed air. The compressed air is fed into the pneumatic actuator 1 and the unit is idled, through the silencers 17 the intensity of the compressed air output and the noise level are checked. Next, the unit on the cable is hung on the hook of a truck crane or a winch, and lowered to the bottom of the sump, foundation pit or channel. The end of the pressure pipe 11 is lowered into the place intended for draining the pumped liquid: tank, tank, lake. Turn on the supply of compressed air and the pneumatic actuator 1 with its shaft and pin 7 rotates the insert shaft 6 with a free vortex wheel 9 located on the seat 8, and a cone opener with longitudinal teeth 10 located on the rear of the insert shaft 6. Into the housing 2 through the suction the pipe 3 enters the fluid and it is supplied with a free-vortex impeller 9 through the discharge pipe 4 into the discharge pipe 11 of the unit to the place of fluid discharge. A conical baking powder with longitudinal teeth 10 and a rigid frame base 12, made in the form of a spatial pyramid and consisting of side inclined ribs 13 and horizontal cross members 14, are embedded in compacted bottom sediments, crushed and loosened. Solid and large inclusions by centrifugal force from a rotating cone baking powder with longitudinal teeth 10 are ejected through slots formed by inclined ribs 13 and horizontal cross members 14 of the frame base 12 to the outside of the suction nozzle 3. The liquid is cleaned of large and solid inclusions and in a cracked form enters through the suction nozzle 3 to the unit on a free-vortex impeller 9, then to the discharge pipe 4 and the pressure pipe 11 to the place of fluid discharge.

Claims (1)

A free-vortex pump unit including a drive, a housing with suction and discharge nozzles and a free-vortex wheel mounted on the drive shaft, characterized in that the drive shaft is equipped with an insert shaft with a conical baking powder mounted on its rear part located in front of the suction nozzle, and a suction the nozzle is equipped with a rigid frame base made in the form of a spatial truncated pyramid and consisting of side inclined ribs connected among themselves by a horizontal GOVERNMENTAL crossbars mounted relative to each other with a gap.