JPH045840B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement of a flow rate adjustment mechanism in a small portable pump.

[Prior Art] Conventionally, in order to adjust the discharge amount of a small portable pump, a first structure has been known in which a resistance valve such as a water faucet is attached to the tip or midway of a discharge hose. was. The second structure, as shown in Utility Model Publication No. 51-47041, is one in which a resistance valve (flow rate adjustment knob) is provided integrally with the discharge hose joint, and the resistance valve is installed in the motor casing. .

[Problems to be Solved by the Invention] In the first structure described above, since the general resistance valve has a structure that can be completely closed, the pump may be operated at a closed state, and the life of the pump is extremely shortened. Ivy. 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 discharge hose is moved, the resistance valve may be hit by stones etc. and damaged. In some cases, the resistance valve came off the discharge hose and was lost.

In the second structure, the resistance valve for flow rate adjustment is formed integrally with the discharge hose joint, so when the discharge hose is connected to the discharge hose joint,
It became difficult to adjust the flow rate, and the opening adjustment of the resistance valve was unstable.

In view of the above-mentioned disadvantages, it is an object of the present invention to provide a resistance valve that is easy to operate, allows stable flow rate adjustment, eliminates the risk of shut-off operation of the pump, and prevents accidents such as breakage or loss of the resistance valve. can be prevented. Our goal is to provide portable small pumps.

[Means for solving the problem] The above purpose is to attach a pump impeller to the motor shaft that protrudes from the end cover of the horizontal shaft motor, and to attach the pump impeller to the motor shaft that protrudes from the end cover of the horizontal shaft motor, and to attach the pump impeller to the casing cover that covers the impeller, with the suction pipe in front and the discharge pipe in front. A suction chamber, a guide chamber, and a steam/water separation chamber are sequentially formed in communication with each other in the inside of the casing cover provided in the upper part and extending from the suction pipe to the discharge pipe, and a check valve is provided in the suction chamber, A portable small pump in which a resistance valve is provided in a water passage between a steam separation chamber and a discharge chamber to adjust the cross-sectional area of the passage without completely closing the passage, the resistance valve being connected to the casing cover. an operating shaft sealed and held in a hole provided in the operating shaft; a knob provided at one end of the operating shaft and protruding from the front surface of the casing cover; and a valve body provided at the other end of the operating shaft;
an elastic piece provided on the operating shaft and having a protruding strip that fits into a groove formed in a hole of the casing cover, the valve body having an outer surface larger in diameter than the operating shaft; The spherical surface is arranged close to a circular hole of a partition plate formed at the lower end of the discharge pipe, and the inside of the valve body is hollow, and the water from the air-water separation chamber is introduced into this cavity. This is achieved by providing the valve body with a tip opening and a side opening that guides water from the cavity into the circular hole of the partition plate.

[Function] The flow rate discharged from the discharge pipe can be adjusted by operating the knob protruding from the front of the casing cover without being obstructed by the discharge hose, etc.
This is done by rotating the valve body of the resistance valve and changing the water passage area from the valve body to the circular hole in the partition plate provided at the lower end of the discharge pipe.

Even if the resistance valve is rotated to reduce the water passage area from the valve body to the circular hole in the partition plate provided at the lower end of the discharge pipe, the structure allows the spherical surface of the valve body to be placed close to the circular hole in the partition plate. This prevents the water passage area from becoming completely zero.

Furthermore, since the convex strip of the elastic piece provided on the operating shaft fits into the concave groove provided in the hole of the casing cover, vibrations caused by rotation of the horizontal shaft motor, etc.
Since the resistance valve does not rotate naturally,
Flow rate adjustment is stable.

Since the resistance valve is placed in the water passage between the air-water separation chamber and the discharge pipe inside the casing cover, even if the discharge hose connected to the discharge pipe is moved, the discharge hose will collide with the resistance valve. Never. Furthermore, even if an object hits the pump outer shell, such as the casing cover, the object will not directly hit the resistance valve. Furthermore, since the resistance valve is located between the steam/water separation chamber and the discharge pipe, when self-priming is performed, it functions to suppress the water's rampage, improving self-priming performance.

[Example] Hereinafter, an example of the present invention will be described based on the drawings.

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, and 37 is a knob for operating the resistance valve 30.
The internal structure of the pump section is shown in FIG. In FIG. 2, 3 is a pump impeller directly connected to the motor shaft 2. The casing cover 7 is provided with a suction pipe 14 on the front surface and a discharge pipe 15 on the upper part.
The casing 4 and the partition plate 5 sandwich the impeller 3 to form a guide chamber 10, and the casing cover 7 and the partition plate 5 form a suction chamber 11 and a steam/water separation chamber 12. A check valve is provided at the end of the suction pipe 14 in the suction chamber 11 .

A resistance valve 30 is provided in the water passage between the steam/water separation chamber 12 and the discharge chamber 15 to adjust the cross-sectional area of the passage without completely closing the water passage. resistance valve 30
The operating shaft 34 passes through a hole in the casing cover 7 and can be operated from the front surface of the casing cover 7.

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

In this example, the valve body 32 of the resistance valve 30 has a spherical outer surface that is larger in diameter than the operating shaft 34, and a cavity 23 inside. It faces the circular hole 22 and is close enough not to block it. The tip 33 and part 31 of the side surface of the valve body 32 are hollow openings, and water flows in from the opening at the tip and flows out from the opening at the side.

The operating shaft 34 has a circumferential groove 35 formed in a portion that fits into the hole of the casing cover 7, and an O-ring 70 is inserted into the circumferential groove 35 to form a sealed portion. Further, the operating shaft 34 is provided with an elastic piece 41 having a protrusion 40 for engaging with a groove 52 provided on the inner surface of the hole of the casing cover 7 . A knob 37 for rotating the operating shaft is provided at the outer end of the operating shaft 34.

The entire resistance valve 30 is constructed such that the neck of the valve body 32 is connected to the inner surface of the casing cover 7, and the tip of a rod-shaped body 29 provided in the cavity 23 along the center line of the valve body 32 is in contact with the casing 4. The axial movement is thus controlled.

Next, the operation of the pump of this embodiment will be explained.

In FIG. 2, water whose pressure has been increased by the guide chamber 10 due to the rotation of the impeller 3 enters the cavity 23 from the tip opening 33 of the valve body 32 and passes through the side opening 31 and the partition plate in the state shown in FIG. 7. It flows out from the discharge pipe 15 through the circular hole 22 of the . If the valve body 32 is turned 90 degrees using the knob 37, it will be in the state shown in Fig. 7.
Since the circular hole 22 of the partition plate 2 is partially closed, the amount of water discharged is suppressed. If the valve body 32 is further turned 90 degrees to the state shown in FIG. 7, most of the circular hole 22 will be closed and the amount of water will be further suppressed. However, since the circular hole 22 does not close completely, the pump is not in shut-off operation.

In operating the resistance valve 30, when the knob 37 is turned, the protrusion 40 provided on the operating shaft 34
A groove 5 provided on the inner surface of the hole of the casing cover 7
2, the opening adjustment of the resistance valve 30 is stabilized.

If you want to perform a self-priming action when starting the pump,
Prime water is injected into the casing cover 7.

When the pump rotates, a part of the air in the suction hose connected to the suction pipe 14 mixes with the priming water and flows into the air-water separation chamber 12 through the guide chamber 10, where the air separated from the water is , valve body 32 and circular hole 21
It is released to the outside through the space between the As this action continues, the air inside the water suction hose is removed, and the water can be pumped.

According to this embodiment, (1) To adjust the flow rate, it is enough to operate the knob 37 on the front of the casing cover, and the resistance valve 30 is connected to the air-water separation chamber 12 and the discharge outlet inside the casing cover 7. Since it is between the tube 14,
Accidents such as damage or loss of the resistance valve 30 can be prevented.

(2) Even if the resistance valve 30 is operated, the water passage between the steam/water separation chamber 12 and the discharge pipe 14 will not be completely blocked, so shut-off operation of the pump can be avoided. , the life of the pump can be extended.

(3) Since the opening degree of the resistance valve 30 is stabilized, appropriate operation can be performed and power saving is possible.

For example, if the lifting height is 1 m and the required water flow is 7/min, the resistance valve 30 is set to the state shown in FIG. Power consumption at this time is 130W. At the same lift height, resistance valve 30
If it cannot be used, water will flow at 28/min more than necessary, and power consumption will be 190W. In other words, according to this embodiment, a flow rate of 21/min and a power consumption of 60 W are eliminated. (See Figure 8) (4) When self-priming is performed, the resistance valve 30 is located in the air-water separation chamber 12, suppressing the rampage of water and improving the self-priming performance. (See Figure 11) Also, if the valve opening is set as shown in Figure 7, only a small amount of water will flow out even after the self-priming action has ended, so water will suddenly gush out with force. No trouble.

You can expect the following effects.

9 and 10 show other embodiments of the resistance valve 30.

In another embodiment, the tip of the operating shaft 34 having the knob 37 and the elastic piece 41 is separated from the main body of the operating shaft 34 having the valve body 32, and each has a projection 61 or an elastic claw. 62 is provided to sandwich the casing cover 7 and connect the separated parts. In other embodiments, the rod-shaped body 29 is omitted. Other examples include
The same effects as the embodiment shown in FIGS. 1 to 8 can be achieved.

[Effects of the Invention] According to the present invention, it is possible to prevent the resistance valve from being damaged or lost, and to prevent the pump from shutting down, and the operability and self-priming performance of the resistance valve are excellent. A small, easy-to-use, portable pump that can stably adjust the flow rate can be obtained.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the pump of the present invention, and Fig. 2 is a perspective view of the pump of the present invention.
FIG. 3 is a longitudinal sectional view of a part of the pump shown in the figure; FIG. 3 is a longitudinal sectional view of an embodiment of the resistance valve constituting the present invention;
The figure is a plan view of the same, and FIG. 5 is a perspective view of the resistance valve in FIG. 3. Fig. 6 is a perspective view of the resistance valve support hole in the casing cover, Fig. 7 is an explanatory diagram showing three states of the opening degree of the valve body, Fig. 8 is a flow rate characteristic diagram of the small pump, and Fig. 9 is the invention of the present invention. 10 is a longitudinal sectional view thereof, and FIG. 11 is a comparison chart of self-priming performance. DESCRIPTION OF SYMBOLS 1... Horizontal shaft motor, 2... Motor shaft, 3... Pump impeller, 4... Casing, 7... Casing cover, 8... Check valve, 10... Guide chamber, 11
... Suction chamber, 12 ... Air-water separation chamber, 14 ... Suction pipe, 15 ... Discharge pipe, 21 ... Partition plate, 22 ...
Circular hole, 23...Cavity, 30...Resistance valve, 31...
...Side opening of the valve body, 32...Valve body, 33...Tip opening of the valve body, 34...Operation shaft, 37...Knob,
40...Convex strip, 41...Elastic piece, 52...Concave groove.

Claims (1)

[Scope of Claims] 1. A pump impeller 3 is attached to a motor shaft 2 protruding from an end cover of a horizontal shaft motor 1.
The casing cover 7 that covers the casing is provided with a suction pipe 14 on the front and a discharge pipe 15 on the top, and inside the casing cover 7 from the suction pipe 14 to the discharge pipe 15, a suction chamber 11 and a guide chamber 10 are arranged in order. , a steam/water separation chamber 12 is formed in communication with each other, a check valve 8 is provided in the suction chamber 11, and a water passage between the steam/water separation chamber 12 and the discharge pipe 4 is provided.
In a portable small pump equipped with a resistance valve 30 for adjusting the cross-sectional area of the passage without completely closing the passage, the resistance valve 30 has an operating shaft 34 that is sealed and held in a hole provided in the casing cover 7. and provided at one end of this operating shaft 34, and the casing cover 7
a knob 37 protruding from the front surface of the operating shaft 3;
4, and an elastic piece 41 provided on the operating shaft 34 and provided with a protrusion 40 that fits into a groove 52 provided in the hole of the casing cover 7. , the valve body 32 has an outer surface made of a spherical surface larger in diameter than the operating shaft 34, and the spherical surface is disposed close to the circular hole 22 of the partition plate 21 formed at the lower end of the discharge pipe 15. The inside of the body 32 is a cavity 23, and this cavity 23
A tip opening 33 that introduces water from the steam/water separation chamber 12 into the partition plate 21
The side opening 31 leading to the circular hole 22 of the valve body 3
2. A small portable pump characterized by the following features: