JPS59170497A - Portable pump - Google Patents

Abstract

PURPOSE:To stabilize flow regulation by providing a resistor valve having an operating shaft penetrating through the casing cover for regulating the cross- section of path without closing said path completely on the water path between a gas-water separation chamber and delivery chamber. CONSTITUTION:A resistor valve 30 for regulating the cross-section of path without closing the water path completely is provided on the water path between a gas-water separation chamber 12 and delivery chamber 15 such that the operating shaft 34 of said valve 30 will penetrate through the casing cover 7 to be operated easily by rotating a knob 37 on the front of said cover 7. Said valve 30 has spherical outer face and inner cavity 23 where the spherical face is facing with a circular hole 22 at the lower end of delivery tube 15 and approached in the range not to choke it. The leading edge 33 of valve body 32 and a portion 31 of side are the opening of cavity 23 where water will flow in through the opening at the leading edge 33 and flow out through the opening at the side 31. With such arrangement it causes no choked operation of pump thus facilitate operation and enable stable flow regulation.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a flow rate adjustment mechanism in a small portable pump.

In order to adjust the discharge noise of town-portable small pumps, conventionally a resistance valve such as a water faucet is installed at the end of the discharge hose or in the middle, but ordinary resistance valves can be fully closed. Because of the structure, there are times when the pump is operated in a closed state.What is the lifespan of the pump? I made it extremely short. In addition, since the discharge hose is usually used without being fixed, the resistance valve attached to it is not only inconvenient to operate, but when the hose is moved, the resistance valve may be hit by stones etc. and damaged. In some cases, the resistance valve would come loose from the hose and be lost.

An object of the present invention is to provide a portable small pump that is easy to operate and allows stable flow rate adjustment without the risk of pump shut-off.

The structure of the present invention consists of a steam/water separation chamber and a discharge chamber that are provided in communication with the inside of a casing cover that covers a pump impeller r attached to a motor shaft that protrudes from an end cover of a portable horizontal shaft motor. Is this the water passage in between? A resistance valve is provided to adjust the cross-sectional area of the passage without completely closing it, and the resistance valve is characterized in that its operating shaft is connected to the casing counter/(-2) so that it can be operated from the front of the casing cover. It is something to do.

Next, the configuration and effects of the present invention will be explained with reference to the illustrated embodiment VC.

In Fig. 1, 1 is a horizontal shaft motor, 7 is a pump casing cover, 14 is a suction pipe, 15 is a discharge pipe, 361-L
A knob for operating the resistance valve? show. The internal structure of the pump section is shown in FIG. In Figure 2, 3 is the motor shaft 2V
C! This is a pump impeller tied together. Casing cover 7
A suction pipe 14 is provided at the front and a discharge pipe 15j is provided at the top. The impeller 3 is sandwiched between the casing 4U and the partition plate 5 to form a guide chamber lOt, and the casing cover 7ti partition plate 5
A suction chamber 11 and a steam/water separation chamber 12i are formed between the two.

A check valve 8 is provided on the end face of the suction pipe 14 in the suction chamber 11 .

According to the present invention, a resistance valve 30 is provided in the water passage between the steam/water separation chamber 12 and the discharge chamber 15, and the resistance valve 30 adjusts the cross-sectional area of the passage without completely closing the water passage. The shaft passes through the casing cover 7 and can be operated from the front of the casing cover.

One embodiment of the structure of the resistance valve 30 will be described using the drawings from 3 to 6.

In this example, the valve body 32 of the resistance valve has an outer surface that is larger than the diameter of the operating shaft 34 and has a cavity 23 inside. It faces the circular hole 22 and is close enough that it will not be blocked. The tip 33 and part 31 of the side surface of the valve body 32 are hollow openings, and water flows in from the tip opening and flows out from the side opening.

In operation 11134, a circumferential groove 35 is formed in the part where the casing cover 7 passes through, and an O-ring 70 is inserted into this to form a sealing part. Further, the operating shaft 34 is provided with an elastic piece 41 having a protrusion 40i near its tip for engagement with a groove 52 provided on the inner surface of the through hole, and a knob 37 for rotating the original shaft is provided on the outer end. It is a provision.

The resistance valve 30 as a whole is configured such that the neck of the valve body 3 contacts the inner surface of the casing cover 7, and the tip of the rod-shaped body 29 provided in the cavity 23 along the center line of the valve body contacts the casing 4, so that the shaft is rotated. Directional movement is suppressed.

Next, the operation of the pump of the present invention will be explained.

In FIG.
It enters the cavity 23 from the front opening 33 of the side opening 31 and the circular hole 22 of the partition plate. and flows out from the discharge pipe 15. Turn the knob 37 to adjust the valve body 32 k 90 (by turning 1' @7
In the state shown in (■) in the figure, the circular hole 22 of the partition plate is partially closed, so the amount of water discharged is suppressed. Valve body 32? Turn the circular hole 22 further by 90 degrees to the state shown in Figure 7.
Most of the area is blocked and the water flow is further suppressed. However, since the circular hole 22 does not close completely, the pump is not in shut-off operation.

When operating the resistance valve 30, when turning the knob 37,
The opening adjustment of the resistance valve 30 is stabilized by engaging the protruding strip 40 provided on the operating shaft with the groove 52 provided on the inner surface of the receiving hole.

FIG. 9 and FIG. 1θ show a second embodiment of the resistance valve 3o.

In this example, the tip of the operating shaft provided on the knob 37 and the elastic piece 41 is separated from the main body of the operating shaft 34 provided with the valve body 32, and is provided on the NVC, the protrusion 61, or the elastic claw 62, respectively. , the separated parts are joined together by being sandwiched between the casing cover 7. In this example, the rod-shaped body 29 is omitted.

When starting the pump (l), the subcommittee that performs the self-priming action r injects priming water into the casing cover 7.

When the pump rotates, part of the air in the suction hose connected to the suction pipe mixes with the priming water and flows into the air-water separation chamber 12 through the guide chamber 10 (1-), where it is separated from the water. Air is discharged to the outside through the gap between the valve body 32 and the circular hole 21. Through the continuation of this action, the air within the water suction hose is expelled, and the state IC shifts to a state where water can be pumped.

The effects of the present invention can be summarized as follows.

α) Since the resistance 9F is installed inside the pump body, it is easy to handle and there is no risk of damage or loss of the valve.

(2) Since the water flow path is not completely blocked during operation of the resistance valve, it is possible to avoid adverse effects on the electric motor and pump, thereby extending the life of the machine.

0) If the resistance valve is configured as in the embodiment, the opening degree of 9fI7J will not change naturally due to photographing, so the water amount adjustment will be stable. By doing this, you can eliminate waste by running the warehouse twice in a row.

For example, when the lifting head is 1m, the safe amount of water is 7t/
If it is 1 nin, the resistance valve r is set to the state m in FIG. 7. Power consumption at this time is 130W. At the same head, if the resistance valve cannot be used, the water will be 2847 m i
VC flow is more than n, and the consumption is 1 power: 190W.

In other words, if the present invention is implemented, the flow rate will be 21t/min,
Power consumption (60WV) eliminates waste. See Figure 8.

(4) When self-priming action 4 is performed, the resistance valve is located in the air-water separation chamber, which suppresses the turbulence of water and improves self-priming performance. See Figure 11.

In addition, when the nine-valve opening tank is set as shown in Figure 7 (■), only a small amount of water flows out even after the self-priming action ends, so there is no problem of water suddenly gushing out with force.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the pump of the present invention, FIG. 2 is a vertical cross-sectional view of a part of the pump shown in FIG. 1, and FIG. Figure 4 is a plan view of the same, Figure 5 is a perspective view of the resistance valve in Figure 3, Figure 6 is a perspective view of the resistance valve support hole in the casing cover, and Figure 7 is an explanation showing three states of the valve opening degree. 8 is a flow cap characteristic diagram of a small pump, FIG. 9 is a perspective view of a different embodiment of the resistance valve according to the present invention, FIG. 10 is a longitudinal sectional view thereof, and FIG. 11 is a diagram of self-priming performance. It is a comparison diagram. l... Horizontal shaft motor, 2... Motor shaft, 3... Pump impeller, 4... Casing, 5... Bulkhead plate, 7...
...Casing cover, 8...Check valve, 10...Guidance chamber, 11...Suction chamber, 12...Steam/moisture heat chamber, 14
... Suction pipe, 15 ... Discharge pipe, 21 ... Partition plate,
22... Circular hole, 23... Cavity, 29... Rod-shaped body, 30... Resistance valve, 31... Side opening of valve body, 32
...Valve body, 33...Tip opening of valve body, 34...
Operating shaft, 35... Circumferential groove, 37... Knob, 40.
...Convex strip, 41...Elastic piece, 52...Concave groove, 61...
...-56￥ No. 7m (1) (l) Chopsticks 7m No./27m

Claims (1)

[Claims] 1. A pump impeller is installed on the motor shaft that protrudes from the end cover of a portable horizontal shaft motor, and a casing cover that covers this impeller is provided with a suction pipe on the T# side and a discharge pipe on the top. Inside the casing cover from the pipe to the discharge pipe, a suction chamber, a guide chamber, a steam/water separation chamber, and a discharge chamber are successively connected and formed, and in a small pump with a check valve provided in the suction base circle. , all stages of resistance valves are installed in the water passage between the steam-water separation chamber and the discharge chamber to adjust the cross-sectional area of the passage without completely closing the passage, and this resistance *a is its operating shaft? A small portable pump characterized by being configured so that it penetrates the casing cover and can be operated from the front of the casing cover.