JPS58180794A - Jet and volute combination pump - Google Patents

Abstract

PURPOSE:To eliminate the priming by facing the delivery port of a jet pump and suction port of a volute pump while returning a portion of the delivery water from the volute pump to the jet pump. CONSTITUTION:The well water 7 will flow through strainer 25-opening 17-water path 26-diffuser 12-delivery port 27-suction port 30-impeller 5-impeller chamber 28-through hole 29-water path 26-delivery port 24-nozzle 11 and filled in the volute pump section 1 and jet pump section 8. Upon connection of the power source, the rotary shaft 4 and impeller 5 will rotate. Upon rotation of the impeller 5, water 7 in said chamber 28 having increased pressure will lift through the through hole 29 to the water path 23-delivery port 24-pumping tube thus to eliminate the priming.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to improvements in jet centrifugal combination pumps.

An example of the conventional maple z4F,'/p used for deep wells will be explained with reference to FIG. In the figure, (1)
is a centrifugal pump installed on the ground and driven by an electric motor (not shown); (2) is this centrifugal pump (1);
(2a) is the suction port provided approximately in the center of this casing (2), (2b) is the casing (2).
) The pressure water port (lc) provided at the lower side in the figure is connected to a pressure tank (not shown) through a discharge port provided at the upper side in the figure of the casing (2).

(2d) A priming port provided at the top of the casing (2) with a male thread carved on the outer circumferential surface.1. ．． )′+. (3) is an embolus that is removably screwed onto the priming port (2d), and (4) is the rotor shaft of the electric motor that protrudes from the casing (2). (5) is a fly wheel that is closely attached to the inner protrusion of the casing (2) of the rotor shaft (4), and the cylindrical part (6) provided at one end.
a) is loosely fitted to the inner circumferential surface of the suction port (2a) with a slit interposed therebetween.

(6) is the shaft sealing member fitted into the kennising (2), (
7) is, for example, well water in a deep well, and (8) is this well water (
(9) is the jet case of this jet pump (8), (9a) is the suction port provided at the bottom of this jet case (9) in the figure, (9b) is the jet pump immersed in In the diagram of the case (9), the female screw (9c) is carved on the upper side of the jet case (9).
In the figure above, the female thread is the female thread (gb).
are arranged parallel to. (9d) is a female thread carved into the inner peripheral part of the jet case (9), and is disposed on the same axis as the female thread (9c). GO is a jet case (
Check valve for closing or closing the rice field suction port (9a), 0
◇ is a nozzle screwed to a female thread (9c), and (c) is a diffuser with one end screwed to a female thread (9c) with a female thread (12a) carved on the inner peripheral surface of the other end. (F) is a suction pipe whose one end is screwed to the female thread Cl2a) and the other end is connected to the suction port (2a), and CXUN is -
It is a pressure pipe whose second part is screwed to a female thread (9b) and whose other end is connected to a pressure water port (2b).

Next, the operation of the device configured as described above will be explained. First, the embolus (3) is removed from the priming port (2d), and priming water is injected through the priming port (2d), and the centrifugal pump (17) is activated.

Fill the suction pipe (to) and pressure pipe (b). Next, when the connecting cable (not shown) connected to the electric motor is connected to the power source (not shown), the rotor shaft (4) and the flywheel (5) are connected.
rotates, and the pressure of the priming water inside the casing (2) increases.

This pressure rises and some of the water in the casing (2) flows through the pressure pipe a → into the jet pump (7) in the well water (7).
8) and is injected at high speed from the nozzle (b).

As a result, the area around the east side of the nozzle becomes a vacuum state, and the back pressure valve QQ opens the suction port (9a), so the well water (7) flows into the suction port (9a).
9a) into the jet case (9). The well water (7) sucked into this jet case (9) and the well water (7) injected from the nozzle (B) are pressurized into the diffuser (to) and rise to a predetermined height within the suction pipe (to). Go over.

This rising well water (7) is further sucked and raised by the centrifugal pump (1), and is further pressurized by the action of the No. 1 pump (6), and is then pumped into the pressure tank (not shown) through the discharge port (2C). Inflow. Further, a part of the water (7) pressurized by the honeycomb wheel (6) is returned to the jet pump (8) through the pressure pipe Q4. When the water (7) discharged from the discharge port (2C) flows into the pressure tank and the water level in the pressure tank rises to a predetermined height, and the pressure in the pressure tank reaches a predetermined value, the pressure switch (not shown) is activated. z)-b: When opened, the electric motor and the spiral pump (1) stop, and the check valve αQ closes the suction port (9a) to prevent the well water (7) from flowing back into the well. In addition, when the water level in the pressure tank drops to a predetermined level by opening the faucet (not shown) and releasing the well, the pressure switch closes and the electric motor and thin-volume pump (1) rotate again, operating in the same way as above. The water is pumped by

As described above, the conventional jet spiral combination pump for deep wells has an electric motor, a centrifugal pump (1), and a pressure tank installed above ground, and only the jet pump (8) pumps well water (7).
), the suction pipe (2) connecting the centrifugal pump (1) and jet pump (8) is
) and pressure pipes (b) are required, which not only requires a long time for piping work but also has the drawback of increasing the number of parts and increasing costs. Moreover, before starting operation, there was the trouble of having to inject priming water until the inside of the centrifugal pump (1), the suction pipe (to), and the pressure pipe α◆ were filled with water. In addition, since the electric motor and the centrifugal pump (1) are installed and operated on the ground, not only does the noise generated by the electric motor and the centrifugal pump (1) increase, but the operation of the pump may be stopped in winter or in cold regions. There was a drawback that the water (7) in the casing (2) would freeze and the casing (2) would be damaged.

This invention has been made to overcome the drawbacks of the conventional jet centrifugal combination pump, and one embodiment of the invention will be described with reference to FIG. 92. In the figure, (2) is the underwater NE111 aircraft, (to) is the load side bracket of this underwater motor (7), and (to) is the load side bracket (16a). is the opening provided at -@ (to) of this casing qI, ni) is the hollow part that served as the 80,000 part of casing -, and ゛ (goods) is the illustration of the 2J! Here, the female thread (b) is created upward.
The internal thread is carved on the same axis as the casing (G), the water passage formed between the inner peripheral wall of the casing (G) and the outer peripheral wall of the hollow part α9, and ■ is the discharge port that communicates with this waterway @ Tatami ζ. , one end is connected to the other end of a lift pipe (not shown), which is connected to a pressure tank (not shown). (2) is a strainer having a large number of pores connected to the periphery of the opening;
) is a water passage communicating with the opening (b), and 01) is a female thread (
The nozzle (2) is a diffuser whose one end is threaded Sv1 to the female thread (B).
It is located on the -w4 line. Yes, I am a Defuser (
The discharge port 2) is a fly wheel chamber provided at the lower part of the casing (G), and is provided with a through hole that communicates with the water passage. (4) is an inlet consisting of a through hole provided at the upper side in the diagram of the flywheel chamber, and (4) is an underwater electric ti
(g) One end of the rotor shaft projects into the honeycomb chamber (2). (5) is a flywheel fitted into the protrusion inside the rotor shaft (4), and the outer peripheral surface of the protruding cylindrical part (5a) formed at one end is the inner circumference of the suction wheel. It is loosely fitted to the surface via ah. (6) is the load side bracket (15a)
This is a shaft sealing member that is fitted into a bulge (xsb) formed on the inner circumference of the shaft. Note that one end of a power supply cable (not shown) is connected to the underwater electric motor (2). Also, a flywheel chamber (2) and a flywheel (5) are connected.

The casing (9) forms a vortex pump (1), and the hollow member, nozzle (b), and diffuser υ form a jet pump (8). In addition, a submersible electric motor (2), a centrifugal pump (υ, JETSU I, and a q pump (8)
) is immersed in well water (/>.

Next, the operation of the device configured as described above will be explained. Well water (7) in strainer) → Opening Q? > - Water passage - → Diffuser @ → Discharge port -) Inlet) → Fly wheel (6) → Fly wheel chamber (2) → Through hole (2) → Water passage (
2) →Discharge port (good) →Flows into the nozzle (b) and fills the row number centrifugal pump part (1) and jet pump part (8). When the power supply cable connected to the underwater motor (2) is connected to a power source, the rotor shaft (4) and the fly wheel (5) rotate. The water (7) in the honeywheel chamber (in which the pressure has increased due to the rotation of the honeywheel (5)) is passed through the through hole () through the water passageway (2)-
Discharge port ■→ Rise to the pumping pipe. A part of the pressure water (7) rising through the water passageway is flowed R into the nozzle (B) of the jet pump (1) and sent from the nozzle (B) to the diffuser (6).
) is injected at high speed. The water (7) injected at high speed from this nozzle (B) and the water (7) sucked into the diffuser (2) from the water passage are pressurized in the diffuser (2) and enter the spray wheel chamber (2). , the pressure is further increased by the action of the flywheel (5), and the through-hole → water passage) → discharge port (goods) →
The water is pumped from the water pipe to the pressure tank, and by repeating the above operation, the water level in the pressure tank gradually rises. When the water level in the pressure tank rises to a predetermined height and the pressure in the pressure tank reaches a predetermined value, a pressure switch (not shown) closes and the submersible motor operator stops. Also a faucet (not shown)
When the pressure switch is opened to release water and the water level in the pressure tank drops to a predetermined height, the pressure switch is closed and the submersible electric motor rotates again to pump water in the same manner as above.

As described above, this invention includes a submersible motor, a whirlpool pump driven by the submersible motor, and a jet pump coupled to the front surface of the centrifugal pump, and the submersible motor and both pumps are immersed in water to pump the pump. In addition to allowing water to naturally flow into the pump, the discharge port of the jet pump and the suction port of the spiral pump are arranged opposite each other, and a part of the water discharged from the centrifugal pump is returned to the jet pump, which is different from the conventional method. It has the following advantages compared to this type of pump.

In other words, priming is not necessary. Since only one pipe is required, piping work is not only easier, but the pipe loss is reduced to 1/j! becomes. Driving noise is significantly reduced.

[Brief explanation of drawings]

l! FIG. 1 is a partial sectional view of a conventional jet spiral combination 4 pump for deep wells, and FIG. 2 is a partial sectional view showing an embodiment of the present invention. In the figure, (1) is a spiral-wound pump, (4) is a rotor shaft, (5) is a fly wheel, (8) is a jet pump,
(B) is the nozzle, (6) is the diffuser, the trout is the casing, (B) is the opening, α9 is the hollow part, (C) is the submersible electric motor, 1g4 is the water passage (2) is the strainer, ( (support)
The symbol is the discharge port, the wheel is the spray wheel chamber, (2) is the through hole, ■ is the discharge port, the ring is the suction port, and (7) is the well water. Note that the same reference numerals in the figures indicate the same or corresponding parts. Agent Makoto Kuzuno

Claims (1)

[Claims] A submersible electric motor, a centrifugal pump coupled to one end of the electric motor and driven by the motor number ζ, and a jet pump coupled to the front surface of the centrifugal pump, and the electric motor and both pumps are submerged in water. During immersion, the water flows into the pump, the discharge port of the jet pump and the suction port of the whirlpool pump are arranged opposite each other, and a part of the water discharged from the whirlpool pump is returned to the jet pump. A jet spiral combination pump characterized by: