JPH0230721B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Field of Application> The disclosed technology belongs to the field of structural technology for pumping devices for slurry, liquid, etc.

<Summary of the gist> According to the present invention, the inside of a closed container is divided into a pressurizing chamber and a pressurized chamber by a flexible membrane, and a pressurizing means is connected to the pressurizing chamber. This invention relates to a pressure-feeding device for pumping slurry or liquid through a pressurized chamber, and in particular, the invention relates to a flexible elastic membrane whose membrane body can bulge into the pressurized chamber to increase the pressurized area. This invention relates to a pumping device that is capable of pumping slurry or liquid into a pressurized chamber using a body under high pressure, and further has a rear cover of a casing formed to protrude in a bulging shape toward the flexible membrane body side.

<Prior Art> Conventionally, a plunger pump or the like has been used as a pumping means in a solid-liquid separator that pumps slurry to a filter such as a filter press and performs a filtration action by pumping the slurry under pressure.

However, such plunger pumps have drawbacks such as friction of the plunger due to friction with foreign substances contained in the slurry, or corrosion due to chemical substances that may be contained in the slurry. However, there were drawbacks such as easy failure and poor operating efficiency.

<Problems to be Solved by the Invention> To address this problem, a diaphragm-type pressure feeding device as shown in FIG. It is divided into a pressurizing chamber 3 and a pressurized chamber 4, and by pressurizing fluid such as oil into the pressurizing chamber 3 and pressurizing the diaphragm 2, the slurry of the pressurized object in the pressurizing chamber is removed. The slurry is pumped from the slurry pumping section 5 to the next stage, but the diaphragm 2 is usually made of a flexible film made of nylon or the like. A design with a shape that bulges into the pressurized chamber 2 is not adopted, and therefore, a pressurizing area that is only slightly larger than the cross-sectional area of the sealed container 1 can be secured, so the capacity is small. There are disadvantages in that the slurry cannot be pumped under high pressure, it is difficult to increase the filtration pressure beyond a predetermined value, and the filtration efficiency cannot be increased.

Further, such problems also apply to liquids other than slurry and pressure feeding.

In order to deal with this, the invention of Patent Law No. 1143619, which is the applicant's earlier invention, solved these problems by using a flexible membrane body in the shape of a bulge inside the pressurizing chamber, but the rear cover of the casing Since the pressure is flat, there is a disadvantage that a large initial injection amount of pressurized fluid oil is required, resulting in a high coil height, and there is also the problem that there is concern about how to deal with a large amount of leakage unexpectedly.

The purpose of the present invention is to solve the problems of the pumping device for solid-liquid separation based on the above-mentioned prior art, and to eliminate the above-mentioned drawbacks, overcome the difficulties, and eliminate the disadvantages. It is an object of the present invention to provide an excellent pumping device that is high in performance, safe, and easy to operate, and is useful for the application of fluid pumping technology in various industries.

<Means/effects for solving the problems> In order to solve the above-mentioned problems, the structure of the present invention, which is based on the above-mentioned claims, is to solve the above-mentioned problems by forming a bulge in a sealed container. After a predetermined amount of slurry or fluid is sucked into the pressurized chamber between the pressurized chamber and the pressurized chamber, which are separated by the provided flexible elastic membrane, the rear lid of the casing is closed. A pressurized fluid such as oil is pressurized into a pressurizing chamber between the flexible elastic membrane and the supporting body, which is formed in a bulging shape and protrudes toward the flexible elastic membrane, and the pressure causes the pressure to rise. The flexible elastic membrane is expanded into the pressurized chamber to increase the pumping pressure, and the pressurized material such as slurry is fed from the pumping section under high pressure, and then the inside of the pressurized chamber is made to have a negative pressure. When the elastic membrane contracts due to negative pressure, the pressurized object is supplied again by the negative pressure inside the pressurized chamber. The body membrane is inscribed and the minimally contracted posture can be maintained, so that it is operated with the minimum amount of initial pressurized fluid and does not contaminate the surrounding area even if pressurized fluid leaks. This is a technical measure.

<Embodiment - Configuration> Next, one embodiment of the present invention will be described below based on the drawing of FIG.

6 is a pressure feeding device that constitutes the gist of this invention,
A flat front cover 8 and a rear cover 8', which protrudes inwardly and is formed as a support, are fixed to the cylindrical casing 7 with appropriate bolts 9, 9..., and the casing 7 and the front cover 8' A gasket 10 is appropriately interposed between the two.

On the other hand, between the casing 7 and the support 8' of the rear lid, there is a flexible material made of, for example, rubber, which in its natural state abuts on the numerous minute protrusions 11, 11... on the inside of the support 8' of the rear lid. A stationary portion of an elastic membrane 12 is held between the elastic membranes 12 and the elastic membrane 12, which extends inside the casing 7 in a bulging manner and divides the interior space of the casing 7 into a pressurizing chamber 13 and a pressurized chamber 14. It is partitioned and divided.

Therefore, as shown in the figure, the pressurized chamber 14 is formed by the support 8' of the rear cover and the elastic membrane 12.

When the elastic membrane 10 is contracted, it comes into contact with a group of minute protrusions 11, 11... of the rear lid 8', so that the minimum contracted state can be maintained in a fixed position, and the rear lid 8'
An injection pipe 15 for the pressurized fluid 14 is attached to the center of the pressurized fluid 14, and is supported by a spander 16.The injection pipe 15 is connected to a pump 17 as a well-known pressure/negative pressure unit by a liquid supply pipe 18. There is.

A slurry suction section 19 is provided at the base of the peripheral surface of the casing 7, and is connected to the pressurized chamber 13 via a supply hole 20 and a check valve 21 to a storage section 23 for the slurry 22. There is.

Further, 24 is a slurry feeding section provided in the center of the front lid 8, and the pressurized chamber 13 is connected to the slurry feeding section of a well-known filter 27 such as a filter press through a feeding hole 25 and a check valve 26. It is connected to 28.

In addition, 29 is a support stand of the pressure feeding device 6, 30 is a support stand of the liquid separation device 27, and 31 is a support stand of the filter 2.
This is a receiving chute for the filtrate flowing out from No.3.

Further, 32 and 33 are appropriate switching valves interposed in the piping of the pump 17.

<Embodiment - Effect> In the above-described configuration, the switches 32 and 33 are switched to the return side, the pressurizing chamber 14 is brought into a negative pressure state by the pump 17, and the flexible elastic membrane 12 is moved to the inside of the rear cover 8'. The protrusions 11, 11... are brought into contact with the groups to bring them into a minimum contracted state, and the inside of the pressurized chamber 13 is filled with the slurry 20. In this state, the switching valves 32, 33 are
When the pump 17 is switched to the forward operation side and the pressurized fluid oil 34 is injected into the pressurized chamber 14, the elastic membrane 10 is expanded by the internal pressure, and the entire inside of the pressurized chamber 13 is expanded. Then, the slurry 22 inside the pressurized chamber 13 is transferred from the slurry feed section 28 to the filter 2 via the pressure feed hole 25 and the check valve 26 due to the strongly increased pressure amplified by the elastic membrane 12.
3, whereby a filter inside the filter 27 performs a pressed filtration action.

Furthermore, in the pressurizing operation described above, in addition to the continuous pressurizing operation of continuously injecting the pressurized fluid 34, the pressurized fluid 34 is
It is also possible to perform an intermittent pressurization operation by injecting 4 intermittently and in an impact manner.

Note that the slurry suction portion 17 is provided with a check valve 19, so that the slurry 19 inside the pressurized chamber 12 is prevented from flowing backward during pressure feeding.

After the slurry is pumped, the switching valves 32, 3
3 and when the inside of the pressurizing chamber 14 is brought into a negative pressure state by the pump 17, the flexible elastic membrane 12 comes into contact with the group of minute protrusions 11, 11... of the supporter 8' of the rear lid and reaches the minimum contracted state. The volume inside the pressurized chamber 13 increases, and the slurry 22 is sucked from the slurry suction part 19 due to the negative pressure at that time.

In addition, in the minimum contracted state of the flexible elastic membrane 12, the elastic membrane 12 is connected to the minute protrusions 11 and 11 of the rear lid support 8'.
11...The contraction ends when it comes into contact with the group, and it returns to its restored position at the center without disturbing the internal slurry and sludge.

Since the support of the rear cover protrudes inwardly, the amount of pressurized fluid such as oil that is initially supplied and press-fit is small, and the amount of unexpected leakage is small, making the work environment will not pollute.

Further, since the slurry pumping section 24 is provided with a check valve 26, the slurry 22 does not flow backward from the slurry pumping section 24 during the slurry supply operation, and therefore, the slurry pumping operation and the slurry supply operation can be performed. can be performed alternately and intermittently,
Of course, the press pressure inside the filter 27 can be gradually increased.

It goes without saying that the embodiments of this invention are not limited to the above-mentioned embodiments; for example, various embodiments can be adopted as the pressurized fluid other than slurry, such as water or a reaction liquid. .

<Effects of the Invention> According to the present invention, since the inside of the pressurized chamber is pressurized by expanding the flexible elastic membrane, the pressurizing area by the flexible elastic membrane is large and a high pressure state can be achieved. Unlike the diamond diaphragm type, the capacity of the casing and the material of the flexible elastic membrane means that the amount of pumping is extremely large, which has the effect of significantly increasing the throughput of solid-liquid separation. .

In addition, the elastic membrane is less likely to be damaged by foreign substances contained in slurry, etc., is less likely to be corroded by chemical substances contained in slurry, etc., and is less likely to malfunction; By continuously or intermittently injecting the slurry or liquid inside the pressurized chamber, it is possible to pump the slurry or liquid inside the pressurized chamber continuously or intermittently and in an impact manner, thereby improving the press efficiency of the filter. Furthermore, when the flexible elastic membrane contracts, it comes into contact with the supporting body that protrudes inwardly in its minimum contracted state. , upon contraction,
The elastic membrane will not be biased, adhered to the inner surface of the cylinder, or collapsed and become unable to return, and after pumping slurry, etc., it can immediately suck the slurry again and perform continuous pumping operation. It is possible to perform continuous pumping operation in extremely high cycles, improve the operating efficiency of the device, and reduce work costs.The structure of the pumping device is also simple and rationally designed. It has the excellent advantage of increasing mass productivity.

In addition, since the flexible elastic membrane comes into contact with the inwardly protruding support of the rear cover when the amount is small, the initial injection amount of hydraulic fluid such as oil can be reduced, which has the effect of reducing costs. Even if a leak occurs, it is effective in that it is easy to recover and does not pollute the working environment.

[Brief explanation of drawings]

FIG. 1 is an operational sectional view of a pumping device based on the prior art, and FIG. 2 is a partially cutaway side view of an embodiment of the present invention. 1... Airtight container, 12... Flexible body membrane, 14...
...pressurizing chamber, 13... pressurized chamber, 17... pressurizing means, 24... pressure feeding section, 6... pressure feeding device, 8'...
support.

Claims (1)

[Scope of Claims] 1. A pressurizing means is connected to the pressurizing chamber of a pressurizing chamber and a pressurized chamber partitioned by a flexible membrane provided inside the sealed container, and the pressurizing chamber is separated by a flexible membrane provided inside the sealed container. A pressurized object suction part and a pressure feeding part are provided in the pressurized material chamber, and a flexible elastic membrane is formed in a bulging shape with respect to the inside of the pressurized chamber. A pressurizing device for solid-liquid separation comprising a support body that can be freely contacted, characterized in that the support body is a rear cover of a casing and is formed in a bulging shape with respect to a flexible elastic membrane body. Pressure feeding device. 2. The pumping device according to claim 1, wherein micro projections are arranged in clusters on the surface of the flexible membrane side of the support.