KR200313072Y1 - Pump for transportation of sandand gravel - Google Patents

Abstract

The present invention is designed to maintain the performance of the pump by installing a stainless steel impeller in the sludge pump for transporting the sludge in dredging and civil engineering work. Also, by connecting the impeller to the stainless steel shaft of the spline, The mechanical seal of carbon and tungsten carbide is used to maintain the robustness. The motor / pump separation type makes it easy to replace the motor and the pump from the pipe system quickly and easily. And it relates to a pump for sludge which forms a discharge aperture to facilitate the installation and replacement of the pump.

Description

Pump for sludge {Pump for transportation of sandand gravel}

The present invention is designed to maintain the performance of the pump by installing a stainless steel impeller in the sludge pump for transporting sludge in dredging and civil engineering works. The mechanical seal of carbon and tungsten carbide is used to maintain the robustness.The motor / pump separation type makes it easy to replace the motor and the pump from the pipe system, and the suction / discharge casing is sucked in-line. And it relates to a pump for sludge which forms a discharge aperture to facilitate the installation and replacement of the pump.

In general, a pump is a fluid machine that receives power from a driver such as a motor, an engine, a turbine, or the like to transport a fluid such as a liquid or a gas through a pipe, or pumps a fluid in a low pressure container into a high pressure container through the pipe. Say. Pumps are widely used for coal mine drainage, ships, pumping, building, water supply, sewerage, drainage, and various plants. Pumps are not only used for water but also for special fluids such as petroleum, various chemicals, pulp, viscous sludge, etc. It is also widely used for transportation.

Pumps are divided into reciprocating pumps, rotary pumps, centrifugal pumps, axial pumps, friction pumps, and other pumps according to the structure thereof, and are also non-suction pumps that require priming during the initial operation of the pumps. It may also be classified as a self-priming pump that does not require it.

Conventional self-priming pumps consist of an upper casing with suction and outlet holes, an impeller with radial wings and rims, a lower casing with annular grooves and a motor. The shaft of the motor penetrating the center of the lower casing is inserted into the shaft hole of the impeller and the key insertion groove via the key.

In the operation of the conventional self-priming pump, when the impeller is rotated counterclockwise by a motor, negative pressure is applied to the annular suction opening formed in the upper casing, and water is sucked in. The suctioned water is annular of the lower casing opposite the impeller. After being transported along the grooves, it exits to the annular discharge openings formed in the upper casing, and is then extruded through the discharge holes.

However, the conventional self-priming pump as described above has the advantage of being easy to use because its configuration is simple and does not require a pick-up material for initial operation, but relatively low head and low discharge pressure and discharge flow rate. There is a serious problem that, in particular, the transfer of high viscosity fluid is impossible.

In addition, when the pump is used for a long time, scales such as residues contained in rinsing water, calcium and magnesium dissolved in high temperature rinsing water are calcified and accumulated on the blades of the impeller, or are formed on the blades when the impeller rotates at high speed. If the stock solution such as rinse and so on is accumulated by the height of the blade by the cavitation (cavitation) phenomenon, there is a problem that after-care is required because these fixing matters must be removed for smooth pumping by the impeller.

The technical problem to be achieved in the present invention is the stainless steel impeller and the spline-type stainless steel shaft for connecting the impeller, and the mechanical seal method of carbon and tungsten carbide material to maintain long life and robustness, and the motor / pump separation type This is to provide a sludge pump that facilitates quick and easy replacement of the motor and separation of the pump from the pipe system, and the inlet / outlet casing forms an in-line suction and discharge aperture for easy installation and replacement of the pump.

1 is a side cross-sectional view of the sludge pump of the present invention.

2 is a front view of the sludge pump of the present invention.

3 is a plan view of the sludge pump of the present invention.

※ Explanation of drawing code

10. Motor Bracket 20. Motor Frame

30. Shaft 40. Casing

50. Impeller 60. Suction Cover

70. Oil chamber 80. Stand

90. Inlet

Accordingly, an object of the present invention, in the sludge pump for transporting sludge in dredging, civil engineering, stainless steel impeller; A spline-shaped stainless steel shaft for connecting the impeller; In order to maintain long life and robustness, it adopts mechanical seals made of carbon and tungsten carbide, and the motor / pump separation type makes it easy and quick to replace the motor and separate the pump from the pipe system, and the in / out casing in-line It is to provide a pump for sludge that forms the suction and discharge aperture of the structure to facilitate the installation and replacement of the pump.

In addition, the lower portion of the impeller is characterized in that the cylindrical inlet is installed to increase in diameter as it goes down.

Hereinafter, with reference to the accompanying drawings will be described in detail.

1 is a side cross-sectional view of the sludge pump of the present invention. As shown in the figure, the sludge pump of the present invention is largely divided into a motor frame 20 for generating power and a casing 40 for suction and discharge.

The motor frame 20 is a case of a motor, and a motor shaft 50 for transmitting power generated from the motor and a motor for power generation are representatively installed in the motor frame 20. Same as the internal components of the pump.

On the other hand, the upper portion of the motor frame 20 is fixed by the motor bracket 10 which serves to hold the motor frame and the bearing. The oil chamber 70 is a container that protects the seal, which is a component that serves to prevent the penetration of water.

In addition, the suction cover 60, which is a cover that blocks a lower portion of the casing to prevent foreign matter from entering the inside of the casing 40, is directly below the impeller 50 and the inside of the casing 40. Is installed to increase the sealing of the pump.

As described above, the pump casing 40 is designed to be suitable for transporting solids and intact, so that the high suction input can be continuously maintained, and the casing suction cover is separated to facilitate maintenance in the casing.

It is easy to use because the structure is simple and easy to maintain due to the above structure, and it is the most suitable for sludge transfer of ready-mixed concrete plant or concrete processing plant. It is possible to treat sewage containing sludge and scale.

2 is a front view of the sludge pump of the present invention. As shown in the figure, the inlet 90 is provided directly below the impeller at the center bottom of the pump casing 40 of the sludge pump of the present invention. The suction port has a shape in which the diameter of the suction port is widened to the lower portion, so that the suction port is excellent, and the suction amount is very large.

According to the above configuration, when the pump is operated, it generates a strong suction pressure and a discharge pressure during rotation of the impeller, and also has a large contact area with the fluid (sludge), thus allowing the transfer of high viscosity fluid.

3 is a plan view of the sludge pump of the present invention. As shown in the figure, the casing 40 of the sludge pump according to the present invention has a cylindrical structure so as to be suitable for transporting solids and intact. In addition, by recirculating a portion of the liquid ejected from the casing in the casing to enhance the volute shape, the suction force is increased and the fluid is smoothly guided to the outlet.

Therefore, by the casing 40 having the shape as described above it is possible to prevent the sludge is fixed in the casing to be calcified.

According to the sludge pump according to the present invention, it is possible to prevent the scale of the calcified material and the residue from sticking to the impeller, and to facilitate the transfer of high viscosity fluid through the strong suction force of the impeller.

Claims (2)

In the sludge pump for transporting sludge in dredging and civil engineering, With stainless steel impeller; A spline-shaped stainless steel shaft for connecting the impeller; In order to maintain long life and robustness, it adopts mechanical seals made of carbon and tungsten carbide, and the motor / pump separation type makes it easy and quick to replace the motor and separate the pump from the pipe system, and the in / out casing in-line Sludge pump for easy installation and replacement of pumps by forming suction and discharge apertures The sludge pump as set forth in claim 1, wherein a cylindrical inlet is formed in a lower portion of the impeller, the diameter of which is increased downwardly.