JPS6367034B2 - - Google Patents

Description

Detailed Description of the Invention This invention is applicable to cases in which water supplied from a tap is temporarily stored in a liquid tank, mixed with a desired chemical, etc., and then pumped to a desired area, or when water supplied from a tap is stored in a liquid tank. This relates to a pump device used when pumping water to a desired area at a pressure higher than that of water, or when drawing up water from a water source such as a pond and pumping it to a desired area. Submersible pumps are well known as pumps that are immersed in liquid, but since known submersible pumps are centrifugal pumps, it is difficult to pump liquid under high pressure.

As a pump device for solving this problem, we have previously provided a device shown in Tokugan Sho 57-157652. In the device of this earlier application, a plunger pump is arranged at the upper part of a liquid tank, the cylinder of this pump is placed in a position where it is immersed in the liquid in the liquid tank, and the suction port at the lower end of this cylinder is opened directly into the liquid, The discharge port is connected to a liquid supply pipe leading to the outside of the tank, but in the device of the previous application, a liquid supply port with a float valve is provided in the liquid tank, and this liquid supply port is connected to a water pipe to communicate with the inside of the tank. The water supply is controlled so that the liquid level is always constant.

Therefore, there was a problem that it could not be used in places where there was no running water or where there was water but the water pressure was low and a sufficient water supply could not be obtained.

In view of the above-mentioned problems, it is an object of the present invention to provide a pump device that can use water in a tank or use water from other water sources depending on the situation of the water supply source. It is something.

In order to achieve the above object, the present invention disposes a plunger pump at the upper part of a liquid tank, has a cylinder of this pump in a position immersed in liquid in the liquid tank, and has a suction port at the lower end of this cylinder. In a pump device in which the liquid is directly exposed to the liquid and the discharge port is connected to a liquid sending pipe leading to the outside of the tank, a threaded cylinder that is coaxially opposed to the suction port of the pump is fixed to a part of the liquid tank. A removable plug has an opening on the inside that is concentric with the suction port, and a removable plug that closes the opening by closely contacting the outer end of the threaded cylinder protruding outside the tank, and a taper on the outer periphery of the inner end that passes through the opening. a removable suction port cylinder whose surface is brought into close contact with a tapered surface on the inner periphery of the suction port of the cylinder; A liquid supply pipe is inserted through the opening and connected to the outer end of the liquid suction port cylinder located at the outer end of the threaded cylinder with the tapered surface of the outer circumference of the inner end portion in close contact with the tapered surface of the inner circumference of the suction port. It is equipped with a removable cap nut that has the function of connecting the two.

An embodiment of the pump device of the present invention will be described below in detail with reference to the accompanying drawings.

In the figure, reference numeral 1 denotes a box-shaped main body made of a steel plate or the like, and has a pair of front wheels 2, a pair of rear wheels 3, and a handle 4, which are swingable.

A prime mover stand 5 is provided at the rear of the main body 1, and a prime mover 6 such as an electric motor is fixed thereon.

Reference numeral 8 denotes a liquid tank removably fitted in the front part of the main body 1, and is made of plastic and has an open top. A liquid supply port 9 and a liquid supply port 10 are provided above the front wall of the tank 8; It passes through the opening and is removably fixed with a screw. Further, a float valve 11 is provided at the inner end of the liquid supply port 9 to control the water supply, and the tank 8
Make sure to keep the liquid level inside constant.

A plunger pump 14 has a crankcase 15 at the top and a cylinder 16 at the bottom, and the output shaft 17 of the prime mover 6 is connected to the crank inside the crankcase 15.

The cylinder 16 is located in the liquid in the tank 8, and its suction port 18 is located at the lower end as shown in FIGS. 3 and 4. Further, the discharge port 19 at the lower end side of the cylinder 16
A liquid feed pipe 20 is connected to the liquid feed pipe 20, and the liquid feed pipe 20 is connected to the liquid feed port 10, and an unload valve 21 is provided in a part of the cylinder 16.

22 in FIGS. 3 and 4 is a threaded cylinder that passes through the bottom of the tank 8 and the bottom of the main body 1, and the inside thereof has an opening 2.
3, which also serves as a drain hole. This screw tube 22
has a flange 24 at the middle of its outer circumference, and a nut 2 screwed into the male thread at the top of the threaded tube 22 and this flange 24.
At step 5, tighten and fix the tank 8 and the bottom of the main body 1 via an O-ring.

In the case of FIG. 3, a rubber plug 27 is applied to the lower end of the screw tube 22, and this plug 27 is attached to the screw tube 22.
Fix it with a cap nut 28 screwed into the male screw on the outside of the lower part.

In the case of FIG. 4, the liquid suction pipe 30 is fitted into the threaded pipe 22, the collar 31 on the outer periphery of the lower end is applied to the lower end of the threaded pipe 22, and the collar 31 on the outer periphery of the upper end of the joint pipe 32 is fitted.
is applied to the lower surface of the collar 31 and tightened with a cap nut 28. If the liquid suction tube 30 and the joint tube 32 are made of plastic, the gaskets on the collars 31 and 33 can be omitted.

When the liquid suction tube 30 is installed with the inner end outer periphery of the liquid suction tube 30 having a tapered surface and the suction port 18 also having a tapered surface, the taper of the upper end outer circumference is the same as that of the suction port 1.
It is configured so as to be in close contact with the taper of No.8.

The operation of the above embodiment will be explained below.

When the opening 23 is closed with a plug 27 and a water pipe is connected to the liquid supply port 9 as shown in Fig. 3, the float valve 11 opens when the tank 8 is empty or the water level in the tank 8 is low. Therefore, water from the tap is supplied into the tank 8 through the float valve 11, and when it reaches a certain level, the float valve 11 closes and the water supply stops. At this time, the cylinder 16 is in the liquid as shown in FIG.

In this state, the prime mover 6 is started to drive the crankshaft of the pump 14, and by reciprocating the plunger in the cylinder 16, the liquid in the tank 8 is pumped through the suction port 18 in FIG. 3 in the same manner as a known plunger pump. The liquid is sucked in and sent out from the discharge port 19 to the liquid feed port 10 via the liquid feed pipe 20 at a pressure higher than the water pressure.

In addition, if the water pressure of the water supply that supplies water to the liquid supply port 9 is low and water cannot be smoothly supplied to the liquid tank 8, or if there is no water supply and it is not possible to continuously supply water to the tank 8, use the bag nut. 28, remove the plug 27, and remove the liquid suction tube 3 as shown in Fig. 4.
0 and a joint pipe 32 such as a curved pipe, and connect the end opening of a liquid supply pipe such as a hose connected to this joint pipe 32 to a water pipe with low water pressure, or put it into a well or pond to pump. 14, it is possible to forcibly absorb water and send it from the liquid feeding port 10 to a required part. At this time, the tapered surface on the outer periphery of the inner end of the liquid suction port tube 30 is in close contact with the tapered surface on the inner periphery of the suction port 18 to maintain watertightness.

As described above, this invention includes a plunger pump placed at the top of a liquid tank, the cylinder of this pump in a position immersed in the liquid in the liquid tank, and the suction port at the lower end of this cylinder directly immersed in the liquid. In a pump device that is open and has a liquid delivery pipe connected to the outside of the tank at the discharge port, in places where tap water pressure is high, the opening in the tank is closed with a plug to supply water from the water pipe to the tank. Then, by sucking up the liquid in this tank with a pump and sending it to the liquid delivery pipe, it is possible to send liquid at a pressure higher than that of the water supply to the desired area.Also, by removing the plug from the opening mentioned above, the suction By inserting a liquid spout and connecting a liquid supply pipe to this liquid suction spout, you can forcibly suck up water from water pipes with low water pressure with a pump, or suck up water from ponds etc. to the desired location. Water can be supplied.

In addition, an opening is provided in the threaded tube provided in the liquid tank, and the plug with the opening closed is fixed with a cap nut screwed into the threaded tube, so there is no risk of water leakage when filling the tank with water. When a liquid suction pipe is inserted into the opening to suck up water from outside the tank, the tapered surface on the outer circumference of the inner end of the liquid suction pipe closely contacts the tapered surface on the inner circumference of the suction port to maintain watertightness. The liquid supply pipe connected to the end of the liquid suction tube is prevented from coming off by screwing a cap nut into the threaded tube.
Therefore, various effects such as being able to perform the two functions of fixing the plug to the threaded cylinder and connecting the liquid supply pipe to the liquid suction tube with one cap nut can be obtained.

[Brief explanation of drawings]

FIG. 1 shows an example of the pump device of the present invention.
FIG. 2 is a partially cutaway plan view of the same as above, and FIGS. 3 and 4 are enlarged longitudinal sectional views showing various states of the main parts. 8...Liquid tank, 10...Liquid feeding port, 14...
Plunger pump, 16...Cylinder, 18...
Suction port, 19...Discharge port, 20...Liquid sending pipe, 23
...Opening, 27...Plug, 30...Liquid suction tube.

Claims (1)

[Claims] 1. A plunger pump is placed at the top of the liquid tank, and the cylinder of this pump is placed in a position where it is immersed in the liquid in the liquid tank.The suction port at the lower end of this cylinder is opened directly into the liquid, and the discharge port is In a pump device in which a liquid sending pipe connected to the outside of the tank is connected, a threaded cylinder coaxially opposed to the suction port of the pump is fixed to a part of the liquid tank, and the inside thereof is an opening coaxial with the suction port. , a removable plug that tightly contacts the outer end of the threaded cylinder protruding outside the tank and closes the opening, and a removable plug that passes through the opening and connects the tapered surface of the inner end of the outer periphery to the inner periphery of the suction port of the cylinder. A removable liquid suction port that is brought into close contact with a surface is provided, and a plug that is screwed into the threaded pipe to close the opening is fixed to the threaded pipe, and a liquid that passes through the opening and is inserted into the suction port. On the circumferential tapered surface,
A pump provided with a removable cap nut having the function of connecting a liquid supply pipe to the outer end of the liquid suction port cylinder located at the outer end of the threaded cylinder with the tapered surface of the outer periphery of the inner end in close contact with each other. Device.