JP3247472B2 - Pump device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pump device, and more particularly to a pump device having a main pump and a slurry separating device provided on a suction side of the main pump, which is suitable for pumping a slurry liquid.

[0002]

2. Description of the Related Art Conventionally, there have been the following two methods for protecting a pump from slurry. (1) A strainer (or filter) is provided on the suction side of the pump to remove the slurry. That is, as shown in FIG.
A strainer 31 is provided on the suction side of the pump 30, and the solid particles are removed by the strainer 31 when the solid-liquid mixture 32 is pumped. (2) A pump that is strong against the slurry liquid by devising the structure and material of the pump body. That is, the pump body is made of a wear-resistant material and has a pump structure through which foreign matter easily passes.

On the other hand, a cyclone separator for continuously separating a slurry in a liquid has been known. Conventionally, as shown in FIG. 6, the cyclone separator 33 is used by being connected to the discharge port of the pump 30. The solid-liquid mixture 32 is pumped by the pump 30 through the cyclone separator 33, the solid particles are separated by the cyclone separator 33 and discharged to the lower side, and the liquid from which the solid particles are removed is separated from above the cyclone separator 33. It is designed to be pumped. That is, the cyclone separator 33 is intended for solid-liquid separation itself, and the pump 3
0 wear was not considered.

[0004]

The above-mentioned method (1) has a problem that the strainer is clogged by the slurry, and the maintenance of the strainer is troublesome. Further, when the slurry itself is to be fed under pressure, there is a problem that the strainer becomes an obstacle and this method cannot be adopted.

[0005] On the other hand, the method (2) has a problem that the cost is increased due to the use of the wear-resistant material because the pump body is made of the wear-resistant material. In addition, there is a problem that the structure of the pump is largely restricted because foreign matter is allowed to pass therethrough.

In the method of installing a cyclone separator for continuously separating the slurry in the liquid at the discharge port of the pump as described above, solid-liquid separation of the slurry liquid can be performed, but wear of the pump can be avoided. There was a problem that it was not possible.

The present invention has been made in view of the above circumstances, and has as its object to provide a pump device capable of protecting a main pump from wear and blockage by providing a slurry separation device on the suction side of the main pump. I do.

[0008]

In order to achieve the above-mentioned object, a pump device according to the present invention comprises a main pump for pressurizing and pumping a liquid, a cleaning liquid discharge port, and a concentrated slurry discharge port. And a slurry separation device for separating into a cleaning liquid and a concentrated slurry, wherein a cleaning liquid discharge port of the slurry separation device is connected to a suction port of the main pump.

[0009]

According to the present invention having the above-described structure, the slurry liquid first enters the slurry separator, and is separated into the concentrated slurry and the cleaning liquid by the slurry separator, and the cleaning liquid is sucked into the main pump from the pump suction port. It is pumped up by the main pump. Therefore, since the slurry liquid does not flow into the main pump, the main pump can be protected from abrasion and blockage, and the main pump does not need to use a material having high abrasion resistance to the slurry.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the pump device according to the present invention will be described below with reference to FIG. In FIG. 1, reference numeral 1 denotes a main pump, and a cyclone separator 4 constituting a slurry separation device is disposed on the suction side of the main pump 1. That is, the mounting flange 5 of the cyclone separator 4 is connected to the suction flange 2 provided at the suction port of the main pump 1.

The cyclone separator 4 includes a cyclone cylindrical portion 6, a conical portion 7 extending downward from the cyclone cylindrical portion 6, a concentrated slurry discharge port 8 for discharging a concentrated slurry liquid, and an upstream rising pipe 9. ing. A suction port 10 is formed in the cyclone cylinder 6, and a suction pipe 11 is connected to the suction port 10. The cyclone separator 4 is supported by legs 12. On the other hand, a discharge flange 3 is provided at a discharge port 1b of the main pump 1, and a discharge pipe 13 is fixed to the discharge flange 3.

Next, the operation of the pump device configured as described above will be described. The slurry liquid sucked into the cyclone separator 4 from the suction port 10 advances to the conical portion 7 while rotating a portion close to the wall of the cyclone cylindrical portion 6, and particles in the liquid are collected toward the peripheral wall portion by centrifugal force. It flows down along the conical surface and flows out continuously from the concentrated slurry discharge port 8 as downstream. On the other hand, the liquid from which the particles have been separated rises in the rising vortex near the center, enters the upper cylindrical portion 6 through the upstream rising pipe 9, and then flows out through the discharge port. Thereafter, the cleaning liquid flows into the pump suction port 1a, and is then pressure-fed and pumped by the main pump 1.

Therefore, according to this embodiment, the slurry liquid is separated by the cyclone separator 4, the concentrated slurry liquid is discharged from the cyclone separator 4 to the outside, and only the cleaning liquid flows into the main pump 1. For this reason, there is no need to use a special material or structure to protect the main pump 1 from the slurry liquid, and the cost can be reduced.

FIG. 2 is an explanatory view showing a second embodiment of the pump device according to the present invention. 2, components having the same functions or functions as those of FIG. 1 are denoted by the same reference numerals, and description thereof is omitted. The embodiment shown in FIG. 2 is the same as the embodiment of FIG. 1 except that the cyclone separator 4 is provided on the suction side of the main pump 1, but in this embodiment, an ejector 15 is further provided on the discharge side of the main pump 1. Has been installed. That is, the ejector 15 provided at the discharge port of the main pump 1 includes a main body 16, a diffuser 17 extending from the main body 16, and a nozzle 18 provided in the main body 16. 19 is connected to the concentrated slurry discharge port 8.

According to the pump device having the above-described configuration, the slurry liquid is separated into solid and liquid by the cyclone separator 4, and then the cleaning liquid is sucked through the suction port 1a of the main pump 1 and pressurized by the main pump 1 to be discharged. 1b. Then, the liquid ejected from the ejection port 1b is ejected from the nozzle 18. Then, since a negative pressure is generated at the jetting portion, the concentrated slurry liquid separated by the cyclone separator 4 is sucked into the main body 16 of the ejector 15 through the conduit 19. Therefore, the cleaning liquid ejected from the nozzle 18 and the concentrated slurry flowing into the main body 16 through the conduit 19 are mixed in this portion and discharged through the diffuser 17.

Therefore, according to the present embodiment, by combining the cyclone separator 4 and the ejector 15, the slurry liquid can be pumped, and only the cleaning liquid flows without flowing into the main pump 1. Because of the inflow, the pump can be protected from wear and blockage from the slurry liquid.

FIG. 3 is an explanatory view showing a third embodiment of the pump device according to the present invention. 3, components having the same functions or functions as those of FIG. 1 are denoted by the same reference numerals, and description thereof is omitted. In the present embodiment, a slurry pump 20 is provided instead of an ejector for pumping the concentrated slurry. That is, by installing the slurry pump 20 in the middle of the conducting pipe 19 connecting the discharge pipe 13 and the concentrated slurry discharge port 8 of the cyclone separator 4, the concentrated slurry is directly pumped to the discharge pipe 13 by the slurry pump 20. I have to.

Since the ejector involves a loss, it is better to use a slurry pump as in the present embodiment for higher efficiency. The ratio of the absolute amounts of the cleaning liquid and the concentrated slurry liquid discharged from the cyclone separator is generally about 9: 1 to 7: 3. Therefore, the output of the slurry pump may be smaller than the output of the main pump. Therefore, even if a high quality material such as ceramic is used for the slurry pump, the cost of the entire apparatus does not increase. In this embodiment, the same operation and effect as those of the second embodiment shown in FIG. 2 can be obtained.

FIG. 4 is an explanatory view showing a fourth embodiment of the pump device according to the present invention. In this embodiment, the conduction tube 19 is also used.
Is the same as that of the first embodiment except that the slurry pump 20 is installed, but the conduit tube 19 is opened without being connected to the discharge tube 13, and the concentrated slurry liquid is discharged from the discharge port of the conduit tube 19. . That is, the cleaning liquid discharged from the main pump 1 is pressure-fed to a predetermined place by the discharge pipe 13, and the concentrated slurry is pressure-fed to the predetermined place by the slurry pump 20 via the conduction pipe 19. In this embodiment, the same operation and effect as those of the second and third embodiments can be obtained.

[0020]

As described above, according to the present invention, a slurry liquid first enters a slurry separator, and is separated into a concentrated slurry and a clean liquid by the slurry separator.
The cleaning liquid is sucked into the main pump from the pump suction port, and is pressurized and pumped by the main pump. Therefore, since the slurry liquid does not flow into the main pump, the pump can be protected from abrasion and blockage, and the main pump does not need to use a wear-resistant material against the slurry. Moreover, according to the present invention, unlike the protection of the pump by a strainer or the like, cleaning maintenance is not required and continuous use can be endured.

Further, according to the present invention, by providing an ejector on the discharge side of the main pump, the concentrated slurry separated by the slurry separating device can be pumped.

Further, according to the present invention, a slurry pump can be provided at the concentrated slurry discharge port of the slurry separating apparatus, and the concentrated slurry can be pressure-fed while being separated from the liquid discharged from the main pump.

Further, according to the present invention, when a slurry pump is used in addition to the main pump, the slurry liquid can be pressure-fed for both the pushing operation and the suction operation.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a first embodiment of a pump device according to the present invention.

FIG. 2 is an explanatory view showing a second embodiment of the pump device according to the present invention.

FIG. 3 is an explanatory view showing a third embodiment of the pump device according to the present invention.

FIG. 4 is an explanatory view showing a fourth embodiment of the pump device according to the present invention.

FIG. 5 is an explanatory view showing a conventional pump device.

FIG. 6 is an explanatory diagram illustrating a method of using a conventional cyclone separator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pump 2 Suction flange 3 Discharge flange 4 Cyclone separator 5 Mounting flange 6 Cyclone cylinder part 7 Conical part 8 Concentrated slurry discharge port 9 Upstream upstream pipe 10 Suction port 13 Discharge pipe 15 Ejector 16 Body part 17 Diffuser 18 Nozzle 19 Conductive pipe 20 Slurry pump

──────────────────────────────────────────────────続 き Continuation of the front page (72) Koji Isemoto 4-2-1, Motofujisawa, Fujisawa-shi, Kanagawa Inside Ebara Research Institute, Inc. (56) References JP-A-57-183595 (JP, A) Kaisho 57-129300 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) F04D 7/04 F04D 29/70

Claims (3)

(57) [Claims] 1. A main pump for pressurizing and pumping a liquid, and a purifier.
It has a clean liquid discharge port and a concentrated slurry discharge port, and cleans the liquid.
And a slurry separation device for separating into concentrated slurry.
Then, the suction port of the main pump is used to clean the slurry separation device.
Connect a purified liquid discharge port, connect the main pump discharge port and the concentrated slurry discharge port of the slurry separator by a bypass pipe, and provide an ejector that operates by the discharge flow of the main pump, and supply the concentrated slurry to the ejector. features and to Lupo pump device that is configured to draw Te. 2. A main pump for pressurizing and feeding a liquid by pressurizing the liquid,
It has a clean liquid discharge port and a concentrated slurry discharge port, and cleans the liquid.
And a slurry separation device for separating into concentrated slurry.
Then, the suction port of the main pump is used to clean the slurry separation device.
Connect the washing liquid discharge port, wherein the slurry pump provided in the concentrated slurry outlet of the slurry separation device, characterized and to Lupo pump device to be connected to the discharge port of the main pump discharge port of the slurry pump. 3. A main pump for pressurizing and pumping a liquid, and a purifier.
It has a clean liquid discharge port and a concentrated slurry discharge port, and cleans the liquid.
And a slurry separation device for separating into concentrated slurry.
Then, the suction port of the main pump is used to clean the slurry separation device.
Connect the washing liquid discharge port, wherein the slurry pump provided in the concentrated slurry outlet of the slurry separation device, and discharged from the main pump liquid to and characterized by the step-up-pumping concentrated slurry in a separated state Lupo Pump device.