JPH03294674A - Fluid pump - Google Patents

Abstract

PURPOSE:To provide a fluid pump which can be used with no fear of leak and electric shock even when it is used underwater, and is simple in structure by letting an expansion body within a hermetic hard container be supplied with and emptied of working fluid repeatedly, and thereby interchangeably opening and closing an inlet valve and an exhaust valve. CONSTITUTION:A hermetic hard container 1 is furnished with an inlet valve 2 and an exhaust valve 3. Both open ends of a tube shaped expansion body 8 is fixedly bonded onto a pedestal 4 provided in the hard container 1. And the pedestal 4 is formed with passages 7 in order that a space which is hermetically enclosed by both of the pedestal 4 and the expansion body 8, is supplied with and emptied of working fluid. In this case, the expansion body 8 is supplied with and emptied of working fluid repeatedly through the passages 7, the inlet valve 2 and the exhaust valve 3 are interchangeablly opened and closed, so that a device functions as a pump. If compressed air is therefore, used in place of working fluid for the expansion body 8 to be supplied with and emptied of, there is no fear of leak and electric shock even if it is used underwater. In addition, the device is simple in structure, a fluid pump can thereby be provided, which is easy to handle, light in weight and low at cost.

Description

[Detailed description of the invention] [Industrial application field] TECHNICAL FIELD This invention relates to fluid pumps.

[Conventional technology]

Conventional fluid pumps are generally known to either use rotary power from a motor or other device to compress fluid through the piston movement of a cylinder and use a valve, or the so-called rotary compressor system that uses an eccentric rotor. There is. In addition, a device is known in which compressed air is created by exciting a soft bellows with electromagnetic force.

[Problem to be solved]

All conventional fluid pumps use electricity, so if they are used underwater, the electrical part must be completely waterproof, which makes them relatively expensive, and large pumps are difficult to handle due to their weight. There was this inconvenience. Furthermore, those using soft bellows are limited to low pressure and small volume of gas. Furthermore, if solid matter or foreign matter is contained in the liquid to be pumped by such a fluid pump, there is a risk that the cylinder and rotor portions will be worn out, making the pump unusable.

Therefore, the present invention is a fluid pump that solves the above-mentioned disadvantages and can be manufactured at a low cost, without worrying about electrical leakage or electric shock even when used underwater, and when solid objects are contained in the liquid being pumped. The purpose of the present invention is to provide a fluid pump that can be used even when it contains foreign matter.

[Failure to solve the problem]

In order to achieve the above-mentioned purpose, there is provided a sealed rigid container equipped with an inlet valve and an exhaust valve, and a tubular inflatable body with both ends open and whose both ends are fixed to a base provided in the rigid container or to the inner peripheral surface of the rigid container. and a passageway formed in the base body or hard container for supplying and discharging a fluid such as air to a sealed space between the inner peripheral surface of the base body or hard container and the inflatable body.

[Effect]

In this invention, when a fluid such as air is injected into the inflatable body through the passage, the inflatable body expands, and the air in the sealed hard container is discharged outside by opening the exhaust valve, and when the fluid is discharged from the passage, the inflatable body expands. Air from the outside is taken in through a suction valve into the contracted and sealed rigid container. By repeatedly supplying and discharging fluid such as air to and from the inflatable body in this manner, the suction valve and discharge valve provided in the sealed hard container are alternately opened and closed, thereby performing the function of a pump. Even if solid matter or foreign matter flows into this sealed hard container, the pump will not be functionally damaged because it does not have a cylinder or rotor section. If compressed air is used as the fluid supplied to and discharged from the inflatable body, there is no need to worry about electrical leakage or electric shock even when used underwater.

〔Example〕

Preferred embodiments of the present invention will be described below with reference to the drawings.

In the first embodiment shown in FIG. 1, the upper end portion of a base body 4 is fixed to the upper surface of the rigid container 1 in a sealed rigid container 1 which includes an intake valve 2 and an exhaust valve 3. The base body 4 is attached to the hard container 1 by protruding a hollow screw 5 fixed to the top surface of the base body 4 to the outside of the hard container 1, and then screwing a nut 6 onto the screw 5.

The hollow part of this hollow screw 5 is a passage 7 formed in the base body 4.
A hose or the like for supplying and discharging fluid is connected to this screw 5. Both ends of a tubular inflatable body 8, which is open at both ends, are fixed to the outer peripheral surface of the cylindrical and rigid base body 7. The lower end of the inflatable body 8 is fixed to the lower end side of the base body 4 by a caulking ring 9, and the inflatable body 8 is folded back and its upper end is fixed to both ends of the base body 4 by caulking rings 10. The passage 7 supplies and discharges fluid such as air into the expandable body 8 . In the figure, reference numeral 11 indicates an intake hole, reference numeral 12 indicates an exhaust hole, and reference numeral 13 indicates a chamber within the sealed hard container 1.

FIG. 2 shows a state in which fluid such as air is exhausted from the passage 7, the expansion body 8 is contracted, and the fluid flows into the chamber 13 through the intake hole 11.

A second embodiment shown in FIG. 3 shows an example in which the base body 4 is not used and the wall of the inner peripheral surface of the hard container 1 is used instead of the base body 4. In other words, a caulking ring 9.1 is attached to the inner peripheral surface of the airtight container 1.
0 to secure the inflatable body 8, and supply and discharge fluid such as air from the passage 7 to the sealed space formed between the inflatable body 8 and the inner peripheral surface of the hard container 1. When fluid such as air is injected from the passage 7, the expandable body 8 expands as shown by the imaginary line in FIG. By repeating the expansion and contraction of the expansion body 8, fluid can be supplied and discharged into the hard container 1.

In the third embodiment shown in FIG. 4, the expandable body 8 is configured to expand inward as in the second embodiment, but a cylindrical base body 4 is attached inside the rigid container 1, and the rigid container 1, the expansion body 8 is repeatedly expanded and contracted.

FIG. 5 shows an arrangement in which the two pumps shown in the first embodiment are prepared, and the water is pumped from the sewage tank 14 through a pumping hose 15 to a sewage treatment tank 17 through a drain pipe 16.

In the figure, reference numeral 18 indicates an air hose, and reference numeral 19 indicates an electromagnetic valve. A pumping hose 15 is inserted into the sewage tank 14, and compressed air of 5 kg/cut is alternately sent to the two pumps through the electromagnetic valve 19.

Sewage is sucked into the pump when air is exhausted, and is sent to a sewage treatment tank 17 through a drain pipe 16 when air is taken in. Approximately 50m when using 5kg/cut compressed air
It was possible to send sewage up to a height of . Of course, if the number of such pumps is increased, the discharge capacity will further increase.

In any of the embodiments described above, it is preferable to embed a reinforcing cord inside the inflatable body 8.
It is also possible to have a multilayer structure with more than one layer. In particular, when sewage is pumped up, the sewage often contains solid matter and foreign matter, so the outer surface of the expandable body 8 needs to have sufficient strength. As the material for forming the expansion body 8, rubber, silicone, and other soft plastic materials are used. It is preferable to use various types of fibers as the reinforcing cord.

〔effect〕

As explained above, according to the present invention, there is provided a sealed rigid container including an inlet valve and an exhaust valve, and a double-ended opening having both ends fixed to a base provided in the rigid container or to the inner circumferential surface of the rigid container. It consists of a tubular inflatable body and a passageway formed in the base body or hard container to supply and discharge fluid such as air to the sealed space between the inner peripheral surface of the base body or hard container and the expandable body. Compressed air can be used as the fluid for expanding and contracting the inflatable body, and there is no fear of electrical leakage or electric shock even when used underwater. Further, the structure itself is simple, and a fluid pump that is low cost, easy to handle, and lightweight can be provided. Furthermore, even if the pumped liquid contains solid matter or foreign matter, there is no risk of impairing the function of the pump.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the inflatable body shown in FIG. 1 when it is inflated, and FIG. 3 is a sectional view of the second embodiment of the invention. , FIG. 4 is a simplified explanatory diagram showing the third embodiment, and FIG. 5 is a schematic diagram of a sewage pumping system using the system shown in the first embodiment. DESCRIPTION OF SYMBOLS 1... Hard container, 2... Suction valve, 3... Exhaust valve, 4... Base body, 7... Passage, 8... Expansion body.

Claims (1)

[Scope of Claims] 1. A sealed hard container equipped with an intake valve and an exhaust valve, and a tubular expandable body with both ends open and fixed at both ends to a base provided in the hard container or to the inner peripheral surface of the hard container. A fluid pump comprising: and a passage formed in the base or hard container for supplying and discharging fluid such as air to a sealed space between the inner peripheral surface of the base or hard container and the expansion body.