JPS5946376A - Pump device - Google Patents

Abstract

PURPOSE:To obtain advantages such as elimination of the need for belt and pulley, prevention of the lowering of volumetric efficiency by suction of air, simplification of seal, and prevention of the heating of a cylinder by a method in which the cylinder of a plunger pump is provided in the upper part of a liquid tank and immersed in a liquid. CONSTITUTION:A crankshaft 8 is driven by a prime mover 3 and a plunger 9 is vertically moved in a cylinder 7, whereupon a liquid sucked from a suction port 12 is sucked into the cylinder 7 and sent out to a desired portion through a liquid supply tube 25 from an outlet 13. Since the suction port 12 is in the liquid, the number of pipes is reduced and resistance in the pipes is lessened. Also, since the cylinder 7, etc., are in the liquid, there is no danger of the lowering of pumping efficiency due to intake of air from the sliding portion, and since the liquid is sucked in even when an aperture is formed in the sliding portion, the volumetric efficiency is raised. Since the crankshaft of the pump is directly connected with the output shaft of the prime mover, the need for V-belt and pulley is eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pump device for pumping various liquids to desired areas.

Submersible pumps are known as pumps that are immersed in liquid, and known submersible pumps are centrifugal pumps, so it is difficult to pump liquid under high pressure.

This invention is a plunger pump, which is different from the above-mentioned centrifugal pump, which can be operated in -C when placed in a liquid, and is capable of high-pressure pumping of liquid compared to a centrifugal pump. It can solve various problems that occur.

That is, this invention provides a cylinder of a plunger pump in the upper part of a liquid tank, immerses it in the liquid, and opens the liquid suction port at the lower end of the cylinder and the residual liquid port of the relief valve directly into the liquid. A liquid feed pipe leading to the outside of the tank is connected to the discharge port, and the drive shaft of the plunger installed in the cylinder is connected to the shaft of the prime mover fixed on the tank, eliminating the need for a level or pulley and allowing the cylindrical part to be immersed in the liquid. The present invention provides a pump device that provides various advantages such as preventing reduction in volumetric efficiency due to air suction, simplifying sealing, and preventing heat generation in the cylinder.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the pump device of the present invention will be explained below based on an embodiment shown in the accompanying drawings.

In the figure, 1 is a liquid tank, and 2 is a top plate on the top thereof. 3 is a prime mover fixed on the top plate 2, and 4 is its output shaft.

5 is the plunger pump, 6 is its crankcase, 7
is a cylinder fixed to the lower end of the crankcase 6.

A crankshaft 8 is rotatably attached to the crankcase 6, and one end thereof is connected to the output shaft 4.

Reference numeral 9 designates a plunger 1 fitted into the cylinder 7, to the upper end of which the lower end of a connecting rod 10 is connected by a pin, one end of the connecting rod 10 being rotatably fitted into the eccentric portion of the crankshaft 8. The plunger 9 is configured to reciprocate as the crankshaft 8 rotates.

A suction port 12 is provided at the front of a lower end member 11 fixed to the lower end of the cylinder 7, and a discharge port 13 is provided at the side of the shrine 11. 14 is a guide tube fixed in the upper end UNI,
The upper end thereof serves as a suction valve port, and a suction valve plate 15 that opens and closes this suction valve port is held in the valve port closed position by a spring 16.

Reference numeral 17 denotes an annular discharge valve plate that is fitted in a small diameter portion on the outside of the upper end of the guide pipe 14 so as to be able to rise and fall.The valve plate 17 closes a plurality of discharge valve ports provided outside the suction valve ports from below by means of a spring 18. -C is here.

19 is an IJ valve for discharging excess water, and the tubular valve box 2
The valve port at the inner end of the valve 0 communicates with the discharge port (3), and the valve body 22 pressed by the spring 21 closes this valve port, and the pressing force of the spring 21 is freely adjustable by the adjusting screw 23. , valve box 2
0 end is provided with a leftover liquid port 24.

25 is a liquid feeding pipe connected to the discharge port 13 and connected to a liquid feeding cock 26 fixed to the top plate 2. 27 Connecting pipe of the lower end member 11--This pipe 27 is connected to a pressure gauge 28 fixed on the top plate 2.

Note that an opening 29 is provided in the top plate 2, and the cylinder tough, the lower end member 11, the relief valve 19, etc. are immersed into the liquid in the tank 1 through this opening 29.

This invention has the above-mentioned configuration, and the prime mover 3 has a crankshaft 8.
When the plunger 9 is moved up and down in the cylinder 7, the plunger 9 moves up and down, negative pressure is created in the cylinder 7, and the suction valve plate 15 resists the spring 16 and is pushed down, causing the suction valve opening to open. It opens, and the liquid sucked from the suction port 12 is sucked into the cylinder 7.

Next, when the plunger 9 descends, the suction valve plate 15 closes the suction valve port, so the liquid pressure in the cylinder 7 becomes high, and the discharge valve plate 17 resists the spring 18 and is pushed down, causing the liquid in the cylinder T to flow to the discharge port. 13 to the liquid sending pipe 25 and passing through the liquid sending pipe (not shown) connected to the cock 26 to the desired part.
Send out the liquid.

Further, if the liquid pressure at the discharge port 13 becomes abnormally high for some reason, the liquid pressure pushes the valve body 22 open against the valve body 21, and the remaining liquid is discharged from the residual liquid port 24.

The above action is the same as that of conventional pumps, and because the cylinder 7 and other parts are submerged in the liquid, it has a similar effect to that of a conventional pump.

That is, in the case of this invention, since the suction port 12 is in the liquid, the liquid can be sucked in without a suction pipe, and the relief valve 1
Since 9 is also in the liquid, the remaining night eyes 24 can be opened directly into the liquid. Therefore, -C piping can be saved and the resistance caused by the piping can also be reduced.

In addition, since the cylinder 7 and other parts are submerged in the liquid, there is no risk of sucking air into the cylinder from the sliding part and reducing pump efficiency, and even if a gap occurs in the sliding part, liquid will not be sucked in. In fact, it has the effect of improving volumetric efficiency.

Since the cylinder 7 is submerged in liquid, the packing parts such as the gland packing inside the cylinder 7 are also submerged in liquid, and the liquid itself acts as a lubricant, eliminating the need for grease and grease seals, eliminating the risk of heat generation, and It is also possible to eliminate the scale or gland packing, which does not need to be tightened very strongly, so the energy required for driving can be significantly reduced.

Since the pump's crankshaft and the output shaft of the prime mover are directly connected, there is no need for a V-belt or pulley, and there are fewer parts that protrude above the tank, resulting in less installation space. If you remove the water pipe, connecting pipe, etc. and turn the pump horizontally around the crankshaft, the entire pump will come out above the liquid, making maintenance such as parts replacement easier.

[Brief explanation of the drawing]

FIG. 1 is a partially longitudinal front view showing an embodiment of the pump device of the present invention, and FIG. 2 is a side view of the same. DESCRIPTION OF SYMBOLS 1... Liquid tank, 3... Prime mover, 4... Output shaft, 5... Plunger pump, 7... Cylinder, 8...
... Crankshaft, 9... Plunger, 12... Suction port, 13... Discharge port, 19... Relief valve, 24...
... Leftover liquid port, 25... Liquid feed pipe. Patent applicant Arimitsu Kogyo Co., Ltd. i! ! Agent Kama 1) Statement 2 Figure 1 Figure 2 3 Procedural Amendment (Mutsu) October 18, 1980 Patent Office Commissioner Kazuo Wakasugi 1, Indication of Case Patent Application No. 157652, 1982 No. 2, Name of the invention Pump device 3, Relationship with the case of the person making the amendment Patent applicant address: 2-3-21 Fukaekita, Higashinari-ku, Osaka, name and name) Arimitsu Kogyo Co., Ltd. 4, Agent 5゜Showa Year Month B (Shipping date)
Correct Contents 1. The "Claims" of the specification of the present application have been amended by the attached sheet. 2 Add the following on page 4 of the statement box, line 7, next to "It is set up." The relief valve shown in "Tatashi" may be installed outside the tank. ” 3. “Inhale...” on page 5, lines 15 to 18.
...Correct the decreasing 0JIF notation and cut it out. ``Since the suction can be performed, piping can be saved, and since the suction valve and discharge valve are located in the liquid, the occurrence of noise caused by the operation of the valve body is significantly reduced.'' Claims: In the upper part of the liquid tank. , the cylinder of the plunger pump is installed so as to be immersed in the liquid, the suction port at the lower end of this cylinder is opened directly into the liquid, and the discharge port is connected to the liquid feed pipe 1 [which leads to the outside of the tank] and is connected to the inside of the cylinder. A pump device 0 in which the output shaft of a prime mover installed on a tank is connected to the driving crankshaft of a plunger installed on a tank.

Claims (1)

[Claims] The cylinder of the plunger pump is installed in the upper part of the liquid tank so as to be immersed in the liquid, and the suction port at the lower end of this cylinder and the leftover liquid port of the IJ IJ-7 valve are directly immersed in the liquid. The discharge port is connected to a liquid sending pipe leading to the outside of the tank, and the K movement 1, 3 is connected to the crankshaft for driving the plunger provided in the cylinder and is provided on the tank. . Pump device with connected output shafts.