JPH0411752B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The disclosed technology belongs to the technical field of the structure of an apparatus for pumping liquid such as industrial waste slurry to a next-stage processing apparatus such as a filter press.

<Summary of the gist> The present invention provides a hydraulic pressure chamber for operating oil, etc., which is formed by a flexible bulge-like membrane made of rubber or the like, in which the housing of the main body of a pumping machine such as a drum type is defined. It consists of a pressure chamber for slurry, etc., and the hydraulic chamber is connected to a liquid supply port for operating oil, etc. and a liquid drain port to the oil tank, and the pressure chamber supplies pressurized liquid, such as slurry, for the liquid to be processed. This invention relates to a pressure feeding device connected to a port and a discharge port to the next stage, and in particular, it is a pressure feeding device that is made of stainless steel or the like and has a circular cross section that is fixed by vulcanization or the like to the approximate center of the inner surface of the tip of a flexible membrane. The tip of a support bar extending later is fixed to the tip of the porous body of the housing, and the base of a guide bar is fixed to the approximate center of the wall of the housing of the hydraulic pressure chamber, and a stainless steel plate is attached to the outside of the guide bar. The base of a cylindrical protruding body having a circular cross section is fixed concentrically, and a support bar is slidably fitted to the guide bar as the flexible membrane expands and contracts;
The present invention also relates to a pressure feeding device in which the flexible membrane comes into contact with and separates from the porous body, and the porous body is slidably fitted to the protruding body, so that the flexible membrane has excellent durability.

<Prior Art> As is well known, a wide variety of pressure feeding devices such as pumps are used depending on the application and purpose of each field.
In particular, pumping equipment used for sludge treatment, factory waste slurry processing, etc., requires high output, large capacity, and large processing capacity.
Instead of a simple diaphragm type pressure feeder, etc., the third invention disclosed in many of the applicant's earlier patent inventions can be used.
A pressure feeding device 1 as shown in the figure has been developed and is now being put into practical use.

In the seed pressure feeding device 1, a flexible membrane 3 made of rubber which is bulged in a natural state is placed inside a sealed drum type housing 2, and its base is connected to the housing 2.
The front pressure chamber 4 and the rear hydraulic pressure chamber 5 are formed between the wall 6 of the housing 2 and the tip of the flexible membrane 3, which are located opposite to each other. A sliding pipe-shaped guide bar 7 and a support bar 8 allow the flexible membrane 3 to maintain a predetermined posture even when contracted, and expand and contract greatly forward. The oil pump 9 of No. 1 supplies the oil 10 as a pressure-fed liquid, and the slurry 12 as the liquid to be treated is sucked into the pressurized chamber 4 from the slurry tank 11 and discharged to the next stage, so that the supply and discharge operation is repeated. It is made to be done.

<Problems to be Solved by the Invention> However, in the pressure feeding device 1 of the conventional technology, when oil 10 is supplied to the hydraulic chamber 5 via the pump 9, the flexible membrane is removed as shown in FIG. 3 expands forward as shown by the dotted line, the support bar 8 fixed to the flexible membrane 3 moves toward the guide bar 7.
, the slurry 12 filled in the front hydraulic pressure chamber 4 is smoothly discharged, but after that, as the oil 10 is discharged from the hydraulic pressure chamber 5, The flexible membrane 3 is reduced,
Slurry 12 from slurry tank 1 is placed in pressurized chamber 4
However, since the flexible membrane 3 is made of rubber or the like, the pressure of the slurry 12 sucked into the pressure chamber 4 is applied to the flexible membrane 3 near the tip of the support bar 8 as shown in the figure. As shown in FIG.
If the concave portion 13 is formed by contacting the tip of the concave portion, and the concave portion 13 is repeatedly expanded and contracted in this state, this portion becomes fatigued over time and is damaged.

Further, by forming the recess 13 in the flexible membrane 3, the support bar 8 sliding on the guide bar 7 bites into the flexible membrane 3 fixed to the support bar 8, and can smoothly slide back and forth. It is difficult to
In addition, a stronger bite is formed, and as a result, the oil 10 filled into the hydraulic pressure chamber 5 in the next continuous stroke
There was a problem in that it became difficult to carry out the series of steps of supplying and discharging the slurry 1 to the hydraulic pressure chamber 4 and, conversely, sucking and discharging the slurry 1 into the hydraulic pressure chamber 4.

Furthermore, when the recess 13 is formed in the flexible membrane 3, the pressure for supplying and discharging the oil 10 to and from the hydraulic pressure chamber 5 and for sucking and discharging the slurry 12 in the hydraulic pressure chamber 4 is constant. Even if 10% of oil is supplied to
There is a problem in that the flexible membrane 3 is difficult to bulge out to the pressure chamber 4 side as indicated by the dotted line in FIG. 3.

<Object of the Invention> The purpose of the present invention is to solve the problems of the pumping device based on the above-mentioned prior art as a technical problem, and to solve the problems of the pumping device based on the above-mentioned prior art. The purpose of this invention is to provide an excellent pumping device that can smoothly repeat operations as designed and improve the durability of the flexible membrane, thereby benefiting the field of fluid processing technology in various industries. In order to solve the above-mentioned problem, the structure of the present invention, which is based on the scope of the above-mentioned claims, is
When operating a pressure feeder that has a flexible membrane that defines the inside of the housing into a hydraulic chamber and a pressurized chamber, a tip with a circular cross section that is fixed to the inner surface of the tip of the flexible membrane by vulcanization or the like is used. When the flexible membrane expands and contracts, the hemispherical porous body passes through the many holes of the porous body and bulges outward from the porous body, and vice versa. When discharging working oil, etc., the flexible membrane is brought into contact with the porous body, and the tip of the support bar extending later is fixed to the center of the tip of the porous body.
Further, the base of a pipe-shaped guide bar and the base of a cylindrical protrusion made of stainless steel or the like are arranged concentrically on the outside of the guide bar, and are fixed to the wall of the housing of the hydraulic pressure chamber. As the hydraulic chamber expands and contracts, the support bar is fitted and supported so that it can slide back and forth without detaching from the guide bar, and at the same time, the porous body with a circular cross section can slide back and forth against the protruding body. By being fitted into the pressure chamber, the liquid to be treated can be supplied and discharged from the pressurized chamber, and even if the flexible membrane is reduced, it will be guided by the porous body and will not form recesses or bite into the support bar. Technical measures have been taken to ensure that the continuous movement of the flexible membrane is carried out smoothly as designed, without causing any damage, and that the flexible membrane has excellent durability and can be pumped in a stable position with less damage. .

<Embodiment> Next, one embodiment of the present invention will be described below based on FIGS. 1 and 2. Note that the same parts as in FIG. 3 will be explained using the same reference numerals.

In the embodiment shown in FIG. 1, reference numeral 1 denotes a pressure device feeding device which constitutes the gist of the present invention, and is used to pressure feed slurry of factory waste liquid to the next stage processing device, and is a drum type. Inside the stainless steel housing 2, a flexible rubber membrane 3 that bulges even in its natural state as in the conventional case forms a pressure chamber 4 at the front and a hydraulic chamber 5 at the rear, and the hydraulic pressure is In the wall 6 of the chamber 5, a hydraulic oil supply port 14 is connected to an oil tank 16 via a valve 15 by an oil pump 9, and a drain port 17 is connected to an oil tank 19 via a valve 18. There is.

The pressurized chamber 4 is provided with a slurry supply port 20 connected to the slurry tank 11 via a valve 21, and the slurry discharge port 22 is connected to the slurry tank 11 via a valve 21.
3 to a slurry tank 24 to the next stage, so that working oil 10 is supplied to the hydraulic pressure chamber 5 of the flexible membrane 3 in the housing 2, and slurry 12 is supplied to and discharged from the pressurized chamber 4. has been done.

Furthermore, the base of a pipe-shaped guide bar 7 made of stainless steel is fixed in a predetermined position approximately in the center of the wall 6 of the hydraulic chamber 5, and a liquid passage hole 25 is bored in the base near the wall 6. There is.

A liquid supply port 1 arranged for the hydraulic pressure chamber 5
4 and the drain port 17, the base of a drum 26 as a cylindrical projection made of stainless steel is fixed to the wall 6 concentrically with the guide bar 7, and the outside of the tip is stopped outward. 27 is formed integrally with the flexible membrane 3, and as shown in FIG. A drum 29 made of aluminum is disposed inside the drum 29, and the substantially central portion of the tip thereof is formed integrally with the non-perforated thicker portion 30 than the other portion, and the inner surface of the tip portion of the flexible membrane 3 is subjected to vulcanization treatment or the like. It is fixed by adhesive.

Further, as the hydraulic pressure chamber 5, in which the rear end of the drum 29 is formed with an inwardly tapered stopper and seal 31 near the drum 26, expands and contracts, the drum 2 closes to the drum 26.
9 are fitted and slid, and the drum 29 is held in the extended position and prevented from coming off.

Further, the tip of a support bar 7 is fixed to the thick walled portion 30 at the tip of the drum 29, and its base is fitted into the tip of a pipe-shaped guide bar 7 to accompany the expansion and contraction of the hydraulic chamber 5. At the same time as the drum 29 moves forward and backward with respect to the drum 26, the support bar 8 is slid back and forth relative to the guide bar 7 without being detached.

In the above configuration, when the pressure feeding device 1 is operated, the flexible membrane 3 inside the housing 2 is in a contracted state, the support bar 8 is fitted into the guide bar 7, and the drum 29 is placed outside the drum 26. Both are fitted and are in the shortest state, and therefore, the pressure chamber 4 is filled with slurry 12 as the liquid to be treated from the slurry tank 11, and the valve 2 is closed.
1 and 23 are set in the illustrated state, when the pump 9 is operated, the operating oil 10 flows from the oil tank 16 through the valve 15 into the hydraulic pressure chamber 5.
The working oil 10 that enters the drums 26 and 29 is supplied to the drums 26 and 29 through a number of holes 28 and 2 in the drums 29.
8... and presses the flexible membrane 3. As a result, the slurry 12 filling the pressurized chamber 4 is forced out into the slurry tank 24 via the valve 23, and due to the expansion of the flexible membrane 3, the slurry 12 is forced into the drum 26. On the other hand, the drum 29 slides forward.

Thereafter, when the valves 15 and 18 are switched to return the working oil 10 in the hydraulic chamber 5 to the oil tank 19, the flexible membrane 3 contracts and the drum 29
The slurry 12 from the slurry tank 11 flows into the pressurized chamber 4 through the valve 21.
inhaled into the body.

The above-mentioned process is one process, and after that, the flexible membrane 3 is expanded and contracted every cycle, and during this period, the approximately central part which is adhesively fixed to the inner surface of the tip part of the flexible membrane 3 through a vulcanization process is The working oil 10 in the drum 29 formed integrally with the thick walled portion 30 passes through the holes 28, 28, . . . as the hydraulic chamber 5 expands.

When the drum 29 is fully stroked, the stopper 27 at the rear end engages with the seal/stopper 31 at the tip of the drum 26 and stops, causing the flexible membrane 3 to expand.

Further, the support bar 8 also expands and contracts with respect to the guide bar 7 without being separated from the front.

Then, in the suction stroke of the slurry 12, the second
As shown in the figure, even if the flexible membrane 3 is brought into contact with the outer surface of the hemispherical portion at the tip of the drum 29 under pressure,
There is no underhang-like concave bite on the side of the support bar 8 as in the conventional aspect;
The drum 29 is fitted to the drum 26 while ensuring the minimum volume of the flexible membrane 3, and the oil 10 filled in the pipe-like shape of the guide bar 7 is discharged from the hole 25, and the oil 10 is discharged into the guide bar 7. The support bar 8 is fitted, and the flexible membrane 3 can be smoothly reduced to its initial state.

Then, by repeating the above series of operations, the flexible membrane 3
By moving closer to and away from the drum 29, the support bar 8 and the thick part 30 at the tip thereof are not bitten, and therefore, the durability of the flexible membrane 3 is excellent, and the flexible membrane 3 can be easily removed from each cycle without being damaged. Pumping operation can be performed in a stable initial position.

As described above, the movement of the support bar 8 with respect to the guide bar 7 and the drum 29 with respect to the drum 26 can smoothly move forward and backward by sliding relative to each other because the flexible membrane 3 does not form a recess or bite.
The flexible membrane 3 can expand and contract from its initial position in contact with the drum 29 by supplying the working oil 10 without changing the minimum volume of the hydraulic chamber 5 for each cycle. As a result, the slurry 12 can be stably and accurately pumped with a large volume and a large output.

It goes without saying that the embodiments of the present invention are not limited to the above-described embodiments, and various embodiments such as a cylindrical protrusion having a plurality of holes can be adopted.

<Effects of the Invention> As described above, according to the present invention, in a pumping device in which a hydraulic chamber and a pressurized chamber are basically formed by a flexible membrane, the cross section fixed to the inner surface of the tip of the flexible membrane is The rear end of a support bar fixed to the tip of a circular porous body with a hemispherical tip is slidably fitted into a guide bar fixed to the wall of the hydraulic chamber. Furthermore, the porous body is slidably fitted into the cylindrical protrusion provided on the outside of the guide bar, so that the hydraulic fluid flows through the porous holes as the hydraulic pressure chamber expands and contracts. passing through the body to expand and contract flexible membranes, especially
During the contraction process of the hydraulic pressure chamber, the flexible membrane that conventionally occurs comes into contact with the hemispherical portion of the tip of the porous body, thereby allowing an underhang-like concave posture under pressure near the support bar. without forming on the flexa;
The flexible membrane is brought into contact with the porous body and does not come into contact with a support bar, etc., so that no sticking occurs, the durability of the flexible membrane is improved, and slurry, etc., can be discharged at high pressure without the risk of damage. The excellent effect of being able to do this is achieved.

In addition, since the porous body fixed to the inner surface of the flexible membrane is slidably fitted to the protruding body, when the hydraulic pressure chamber is contracted, the flexible membrane is brought into contact with the porous body, and the flexible membrane is slidably attached to the support bar. There is no occurrence of biting by the flexible membrane, therefore fatigue of the flexible membrane is reduced, and a series of pumping actions can be performed in a stable posture, which is an excellent effect.

Furthermore, the flexible membrane contacts the porous body and contracts to ensure the minimum volume of the hydraulic chamber, thereby reducing the sliding contact between the porous body and the protruding body, and between the support bar and the guide bar. Smooth movement is ensured, and the supply of hydraulic fluid shifts the flexible membrane in contact with the porous body from its initial position to the expansion stroke, making it possible to accurately sustain large-capacity, high-output pumping. Excellent effects are produced.

[Brief explanation of drawings]

1 and 2 are explanatory diagrams of one embodiment of the present invention, in which FIG. 1 is an overall schematic cross-sectional view, FIG. 2 is a partially enlarged cross-sectional view of a flexible membrane in contact with a porous body, and FIG. FIG. 1 is an overall schematic sectional view of a pumping device based on the prior art. 5... Hydraulic pressure chamber, 4... Pressurized chamber, 3... Flexible membrane, 14...
Liquid supply port, 17... Drain port, 20... Supply port, 22... Discharge port, 1'... Pressure feeding device, 8... Support bar, 29... Porous body, 6... Wall, 7... Guide bar, 26... Projection body.

Claims (1)

[Scope of Claims] 1. A hydraulic chamber and a pressurized chamber are defined by a flexible membrane, the hydraulic chamber is connected to a liquid supply port and a liquid drain port, and the pressurized chamber is connected to a supply port and a discharge port. In the pumping device that
The tip of the support bar is fixed to the tip of a porous body with a circular cross section and a hemispherical tip that is fixed to the inner surface of the tip of the flexible membrane, and the base of the guide bar is attached to the wall of the hydraulic chamber. and the base of a cylindrical protrusion provided on the outside of the guide bar are fixed, and the support bar is slidably fitted to the guide bar, and the porous body is slidable to the protrusion. A pressure feeding device characterized by being freely fitted. 2. The pressure feeding device according to claim 1, wherein a plurality of holes are bored in the cylindrical protrusion. 3 A stopper is formed at the tip of the protrusion,
2. The pressure feeding device according to claim 1, wherein the stopper at the base of the porous body is lockable.