JPH03189388A - Forced feeding device - Google Patents

Abstract

PURPOSE:To suppress the occurrence of leakage of a pressure, to improve operability of a flexible film, and to improve durability of a device by a method wherein the end part of a flexible film molded in a swelling shape is enlarged in the direction of swell for molding to form a peripheral edge part, and a groove matching the peripheral edge part is formed in the contact surface of a casing. CONSTITUTION:A flexible film 4' is integrally molded in a swelling shape by using rubber, and a peripheral side part 4E being an end part is enlarged at a front and a rear in a swelling direction. Meanwhile, the contact surface of a casing has an annular groove 16B in a U-shape in cross section matching the shape of a pointed protrusion part 15 of the film 4', and the contact surface of the other casing has an annular groove 16A formed approximately in a U-shape in cross section matching the shape of a base part 14. The flexible film 4' is nipped at the end part 4E by pressing the contact surfaces of the two casings, and the inside and the outside of the film 4' are partitioned from each other in the casings. Thereby, when working oil flows in a forced feed device at a high pressure to pre-load the film 4', the film and part 4E is enlarged for molding and adhered to grooves 16A and 16B to suppress leakage of the pressure of working oil. Bending due to expansion and contraction of the film 4' is absorbed by the thick part of the end part 4E.

Description

[Detailed Description of the Invention] <Industrial Application Field> The disclosed technology is a pressure-feeding device used for processing waste such as factory waste liquid, and is a technology of a flexible membrane structure that expands and contracts as supply and discharge operations are performed. Belongs to a field.

<Summary of the gist> The invention of this application is such that a bulging flexible membrane made of rubber is housed inside a casing, and the inside of the casing is defined as the inside and outside of the movable membrane, so that the casing is flexible. By holding the ends of the flexible membrane, one side is provided with a suction and discharge port for the hydraulic oil, and the other side is provided with a suction and discharge port for the liquid to be treated, and the suction and discharge ports for the hydraulic oil and the liquid to be treated are flexible. This invention relates to a pressure feeding device that communicates between the inside and outside of a membrane, and in particular, the end of the flexible membrane is expanded in the direction of expansion to form a peripheral edge, and a groove is provided to fit the peripheral edge. This invention relates to a pumping device that is clamped in a casing.

<Prior Art> As is well known, with the development of industry, large amounts of sludge waste such as slurry are being discharged from various factories, and the applicant has invented and devised a bulging type plant for industrial waste treatment plants. A pumping device with a flexural membrane inside is in operation.

As shown in FIG. 4, this pressure-feeding device 1 has a support 3 such as a perforated plate erected on one side 2A of a casing 2, and a bulging flexible IlI4 is disposed on the outside of the support 3. The end portion 4F is sandwiched and installed in the posture of connecting the one side 2A and the other side 2B of the casing 2, and is placed on the pressurized side with respect to the interior defined on the inside and outside of the flexible membrane 4. The hydraulic oil 7 in the tank 6 is switched by the switching valve 8 to flow in and out by the pump 5, while on the operating side, the slurry 9 is transferred from the tank 10 to the one-way valve by the contraction of the flexible membrane 4. 11.
11' into the working chamber 12 of the casing 2,
As a result, the flexible membrane 4 is bulged to be fed under pressure to the filter press 13.

The flexible membrane 4 is integrally molded into a bulging type, and due to its shape-retaining force, the end portion 4F is held in the casing 2, and the casing 2 is connected to a casing 2A forming the inside of the flexible membrane 4. A suction/discharge port for the hydraulic oil 7 is provided in the casing, and a suction/discharge port for the liquid to be treated 9 such as slurry is provided on the other side 28 of the casing forming the outside.

<Problems to be Solved by the Invention> However, the flexible membrane 4, which is used by repeatedly expanding and contracting within the casing 2, is preloaded on the inside and sucks and discharges the slurry 9 within the working chamber 12 defined on the outside. However, if there is excessive pressure at the end 4E of the flexible membrane 4,
It may not be able to fully absorb the bending, and it may become distorted and harden internally.
It had the disadvantage of accelerating deterioration.

When the hydraulic oil 7 is drawn in and discharged from the inside of the flexible membrane 4 under high pressure, pressure leaks at the joining part of the casings 2A and 2B and leaks into the working chamber 12 where the slurry 9 is supplied and discharged, resulting in this state. There is a risk that the flexible membrane 4 may come off from the grip of the casing 2, and the flexible membrane 4 may fall off inside the pumping device 1.

<Object of the Invention> The object of the invention of this application is to solve the problem of supporting the movable membrane during high-pressure suction and evacuation of the pumping device based on the above-mentioned prior art, and to solve the problem of supporting the movable membrane, and When the casing is formed on the pressure side and the working chamber side to sandwich the flexible membrane, the casing is reliably formed to suppress pressure leaks, and also improves the operability of the flexible membrane to improve the pressure feeding device. It is an object of the present invention to provide an excellent pumping device that improves the durability of the fluid and is useful for the field of fluid treatment technology in the industrial waste treatment industry.

In order to solve the above-mentioned problems, the structure of the invention of this application, which is based on the above-mentioned claims, is to solve the above-mentioned problems. The end portion is expanded and molded in the direction of expansion to form a peripheral edge, and a groove in which the peripheral edge fits is provided on the contact surface of the casing to sandwich it, and the flexible membrane is reliably sandwiched inside the pumping device so that it can freely expand. Technical measures have been taken to suppress pressure leaks when pressurizing the inside of the flexible membrane with hydraulic oil, etc., to ensure reliable suction and exhaustion, and to prevent the flexible membrane from falling off. I'll go.

<Example> Next, one example of the invention of this application will be described below based on FIG.

Incidentally, the same parts as those in FIG. 4 will be explained using the same reference numerals.

Reference numeral 4' denotes a flexible membrane which forms the center of the gist of the invention of this application, and is integrally molded from rubber and has a bulging type. The front and back of the direction are enlarged.

The end portion 4F is pressure molded at the base portion 14,
The tip 15 is shaped into a pointed convex shape.

Furthermore, the abutting surface of the casing 2B is the sharp convex portion 15 of the flexible membrane 4'.
A groove 16B is provided in a circular shape with a substantially U-shaped cross section in accordance with the shape of the base 14, and a groove 16A is provided in a circular shape with a substantially U-shaped cross section in the contact surface of the casing 2A. ing.

Thus, referring to FIG. 4, the flexible membrane 4' is configured such that the end portions 4 [and the abutment surfaces of the casings 2A and 2B] are clamped so as to sandwich the flexible membrane 4'. The inside and outside of the casing 2 are defined within the casing 2.

In the above configuration, when the pressure feeding device 1 is operated, the pump 5 is operated, and the switching valve 8 causes the hydraulic oil 7 to be transferred to the flexible membrane 4'.
The slurry 9 is sucked and discharged from the slurry tank 10 as the hydraulic oil 7 flows and flows inside the slurry tank 10 .

The hydraulic oil 7 flows into the pumping device 1 at high pressure to prepress the flexible membrane 4', but the end portion 4F of the flexible membrane 4' is enlarged and formed into the grooves 16A and 16A of the casings 2A and 2B. 16B, pressure leakage of the hydraulic oil 7 is suppressed.

Then, the flexible membrane 4' continuously expands and contracts, and pumps the slurry 9 flowing into the casing 2 to the filter press 13.

In addition, the flexible membrane 4' has an enlarged end portion 4F as the casing 2A,
By being securely held by 2B, pressure leaks are suppressed and falling off is also prevented.

The deflection caused by expansion and contraction of the flexible membrane 4' is absorbed within the box extending from the flared portion of the end portion 4F, and no strain remains, improving operability.

It is needless to say that the embodiment of the invention of this application is not limited to the above-mentioned first embodiment, and as shown in FIG. The joining part is inside the box, and as shown in Fig. 3, a metal ring 17, 17 is cast into the convex part 15 at the end to suppress twisting in the circumferential direction due to bending. Various aspects can be adopted, such as improving the rigidity of the flexible membrane 4'.

It goes without saying that it can be used not only for slurry, but also for pumping other liquids or water.

<Effects of the Invention> As described above, according to the invention of this application, the pressure leak of hydraulic oil is basically suppressed during operation of the pumping device, so the suction and discharge efficiency of the pumping device used for high-pressure pumping is improved. The effect of Qin was brought to light.

Since the flexible membrane installed in the pressure feeding device is enlarged at the end in the direction of expansion, etc., and is sandwiched between the casings,
It is possible to block the leakage of liquids such as hydraulic oil sucked and discharged from the inside of the flexible membrane, and it is possible to reliably support the flexible membrane.
Furthermore, the shape of the end portion also provides an excellent effect of preventing the flexible membrane from falling off.

Since the end part is expanded and molded into an integrally bulging type, the deflection caused by expansion and contraction is sufficiently absorbed by the inner part of the box, increasing the operability of the flexible membrane and increasing the durability of the pumping device. It also has the excellent effect of improving sexual performance.

[Brief explanation of drawings]

The drawings are detailed explanatory diagrams of the invention of this application, and FIG. 1 is a partial cross-sectional view of the flexible membrane and the casing, FIG. 2 is a partial enlarged cross-sectional view of the flexible membrane, and FIG. 3 is a diagram showing another embodiment. A sectional view corresponding to FIG. 2 in the example, and FIG. 4 are a schematic sectional view of the pumping device.

Claims (3)

[Claims] (1) In a pumping device in which a bulging flexible membrane defines the inside and outside of a casing, and the flexible membrane is clamped by the casing at its ends, the ends of the flexible membrane A pressure feeding device, characterized in that the portion is enlarged and sandwiched between the casings described above and provided with grooves. (2) The pressure feeding device according to claim 1, wherein the end portion of the flexible membrane is expanded in the direction of expansion. (3) The pumping device according to claim 1, wherein a metal ring is cast into the end of the flexible membrane.