JPH088316Y2 - Residual water treatment machine - Google Patents

Description

[Detailed Description of the Invention] [Technical field of the invention] The present invention relates to a structure of a residual water treatment machine which is used for draining water at a low water level, sucking accumulated water on a floor, and the like.

[Background of the Invention] As is well known, in a residual water treatment machine, air and foreign substances are often sucked together with water from a suction port. The submersible centrifugal pump originally does not like to suck in air, but in the residual water treatment machine using the submersible centrifugal pump, as shown in FIG. 2 [A] and [B], the water storage tank 1 ′ and the circulation hole 8 ′ that circulates. It is necessary to set up around the pump suction port 7'to prepare for suction of air.

When the operation is started, water is supplied from the water supply port 2'until the submersible centrifugal pump 4'in the water storage tank 1'is immersed.
The submersible centrifugal pump 4'is started with the residual water suction port 12 'brought into contact with the water surface W'to be treated. When the submersible centrifugal pump 4'starts up, the impeller 13 'rotates to cause a suction action from the pump suction port 7'and also sucks the water in the water storage tank 1'through the circulation hole 8', so that the centrifugal force acts. Impeller 1
It is possible to generate a negative pressure in the central portion of 3'and suck the mixture of water and air from the residual water suction port 12 '.

In this case, as shown in FIG. 2 [A], the smaller the distance between the impeller 13 'and the suction cover 6', the higher the ability to suck water from the flow hole 8 ', but on the other hand, foreign matter is clogged. It will be easy. Further, as shown in FIG. 2B, if the distance between the impeller 13 'and the suction cover 6'is increased, foreign matter can easily pass through, but the ability to suck water from the flow hole 8'is reduced. As a result, the gas-liquid suction function from the residual water suction port 12 'is impaired.

[Object of the Invention] The object of the present invention is to provide a residual water treatment device using a submersible centrifugal pump without reducing the ability to suck water from the flow hole, that is, to improve the gas-liquid suction function from the residual water suction port. Another object of the present invention is to provide a structure in which foreign matter can pass therethrough while being held and does not cause clogging.

[Constitution of the Invention] In the present invention, the discharge port of the submersible centrifugal pump housed in the water storage tank is opened into the water storage tank, and the drain port communicating with the discharge port is opened outside the water storage tank. The conduit connected to the suction port is led out of the water storage tank, the open end of the leading part is used as a connection part for a suction hose described below, and the base part of the suction hose with a suction port for residual water suction is attached to the connection part. In the residual water treatment machine which is connected to the pump suction port and has a circulation hole formed in the periphery of the pump suction port, the lower edge of the impeller blade plate approaches the inner bottom surface of the suction cover near the opening of the circulation hole. , The foreign matter is blocked by forming the inner bottom surface of the suction cover on the outer cone of the opening of the through hole so as to be separated from the inner bottom surface of the suction cover toward the outer circumferential direction in a downward conical inclined surface. Because it has a preventive structure It

[Operation] When the submersible centrifugal pump is started with water supplied from the water inlet until the submersible centrifugal pump in the water storage tank is immersed and the residual water suction inlet is in contact with the water surface to be treated, the impeller rotates. A suction action is generated from the pump suction port and the water in the water storage tank is sucked from the circulation hole, and a negative pressure is generated in the center of the impeller by the action of centrifugal force to suck water and air from the residual water suction port. As a matter of fact, foreign substances mixed in at this time are also sucked in together. Then, the sucked contaminants are sent together with the gas and liquid from the discharge port into the water storage tank, and discharged from the drain port to the outside.

[Embodiment] An embodiment will be described below with reference to FIG.

Reference numeral 1 is a water storage tank, 2 is a water supply port attached to the upper surface of the water storage tank 1, 3 is a drainage opening provided in an upper portion of the water storage tank 1, 4 is a submersible centrifugal pump housed in the water storage tank 1,
Reference numeral 5 denotes a discharge port of the submersible centrifugal pump 4, which is a water storage tank 1.
It communicates with the drainage port 3 through the inside. Reference numeral 6 denotes a suction cover having an inner bottom surface formed in a slope 14 having a downward slope toward the outer peripheral direction. Circulation holes 8 ... 8 are arranged in the peripheral portion of a pump suction port 7 projecting in the center. There is. 9 is the pump suction port 7
Is a conduit which is connected to the water storage tank 1 and is led out to the outside of the water storage tank 1.
Is formed. The base of the suction hose 10 is the above-mentioned connecting portion 11
And a suction port 12 for sucking residual water, which is in contact with the water surface W to be treated, is attached to the tip portion. Reference numeral 13 denotes an impeller, and the lower edge of the vane plate faces the inverted cone-shaped inclined surface 14 of the suction cover 6 so that it approaches the inner bottom surface of the suction cover 6 near the opening of the flow holes 8. 8 is separated from the inner bottom surface of the suction cover 6 in the outer peripheral portion than the opening portion of the circulation holes 8 ... 8, and the foreign matter passage property is good without reducing the suction ability from the circulation holes 8 ... It can be Reference numeral 15 is a discharge hose connected to the drainage port 3. The water and foreign substances collected by the residual water treatment device of the present invention are discharged to a predetermined disposal site by this discharge hose.

[Effect] As shown in FIG. 2A, when the entire lower edge of the blade plate of the impeller 13 'is brought close to the inner bottom surface of the suction cover 6',
Although the suction capacity from the flow holes 8'is high, on the other hand, foreign matter is likely to be clogged. Also, FIG. 2 [B]
As shown in Fig. 7, when the entire lower edge of the blade plate of the impeller 13 'is separated from the inner bottom surface of the suction cover 6', the foreign matter passage property is good, but on the other hand, the suction ability from the circulation hole 8 ' Will decrease and the gas-liquid suction function from the residual water suction port 12 'will be impaired, and the function as a residual water treatment machine will be lost.

On the other hand, in the residual water treatment apparatus of the present invention, as shown in FIG. 1, the inner bottom surface of the suction cover 6 is formed into the inverted cone-shaped inclined surface 14, so that the impeller 13 is provided near the opening of the circulation hole 8.
Of the impeller 13 from the lower edge of the impeller 13 and does not reduce the suction ability from the circulation hole 8 near the lower edge of the impeller 13. It is designed so that it does not cause any bearing to pass. In this way, while maintaining the gas-liquid suction function from the residual water suction port 12,
It is a very rational structure that can prevent foreign matter from being blocked, and has a great practical effect.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of a main part of a residual water treatment machine having the structure of the present invention, and FIG. 2 is a vertical sectional side view of a main part of a residual water treatment machine not having the structure of the present invention. Is a case where the distance between the impeller and the suction cover is made small, and [B] is a case where the distance between the impeller and the suction cover is made large. 1 ... water storage tank, 3 ... drainage port, 4 ... submersible centrifugal pump, 5 ... discharge port, 6 ... suction cover, 7 ... pump suction port, 8 ... circulation hole, 9 ... conduit, 10 ...... Suction hose,
11 …… Connection part, 12 …… Suction port for sucking residual water, 13 …… Impeller,
14 …… Inverted cone-shaped inclined surface.

Claims (1)

[Scope of utility model registration request] 1. A drain port for opening a discharge port (5) of a submersible centrifugal pump (4) housed in a water storage tank (1) into the water storage tank (1) and communicating with the discharge port (5). (3) is opened to the outside of the water storage tank (1), the conduit (9) connected to the pump suction port (7) is led out to the outside of the water storage tank (1), and the open end of the lead-out portion is sucked in later. Hoses (10)
Of the suction hose (10), which has a suction port (12) for sucking residual water at the tip, is connected to the connection part (11), and the pump suction port (7) In a residual water treatment machine in which a circulation hole (8) is opened in the peripheral portion, the lower edge of the blade plate of the impeller (13) approaches the inner bottom surface of the suction cover (6) near the opening of the circulation hole (8). Then, the inner bottom surface of the suction cover (6) is inclined downward in an inverted cone shape so that the inner bottom surface of the suction cover (6) is separated from the inner bottom surface of the suction cover (6) in the outer peripheral portion than in the opening portion of the circulation hole (8). A residual water treatment machine characterized by being formed on the surface (14).