JPH0754117B2 - Pumping device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The disclosed technology belongs to the technical field of the structure of an apparatus for pumping a slurry such as a factory waste liquid under a high pressure to supply it to a process such as solid-liquid separation.

<Summary of the Summary> The invention is made of a swelling rubber that has a wide sealed base end portion in which a base end portion is tightly bound and provided in a casing such as a drum type, and the front end portion is narrowed. A swelling elastic film body having a wide base portion such as a suction chamber for sucking and discharging a liquid to be treated such as a slurry inside and a pressure chamber filled with pressurized oil inside the casing. And a support provided between the elastic membrane and the lid of the casing so that the elastic membrane retains its shape-retaining property when contracted inside the elastic membrane. In particular, the invention is related to the invention, and in particular, a support of a porous bulging shape similar to the elastic film body on the side opposite to the suction and discharge chamber side is provided, and the hydraulic cylinder is fixed to the lid of the casing, A reciprocating cylinder such as another hydraulic cylinder that is connected to the hydraulic cylinder by sealing a certain amount of pressurized oil between it and the pressure chamber. The actuator allows the elastic membrane to expand and contract in response to the advance / retreat of the hydraulic cylinder so that the liquid to be treated such as slurry can be intermittently pumped from the tank to a solid-liquid separator such as a filter press under high pressure. The invention relates to the pressure feeding device.

<Prior art> As is well known, as the life of citizens improves, various industrial products flood the market, and it is extremely important for both citizens and companies to treat and recycle waste. It's becoming a problem.

Among them, solid-liquid separation of a liquid to be treated containing solid components such as slurry of factory waste liquid is extremely effective and important means for slurry treatment, and therefore high-efficiency solid-liquid separation in primary and secondary treatments is possible. It has become necessary, and moreover, a large amount of processing has been demanded.

Thus, in order to process a large amount of a liquid to be treated such as the seed slurry, a pressure-feeding device to a solid-liquid separation device or the like by high pressure is necessary, but a conventional plunger type pressure-feeding device can pressure-feed in a high pressure state. Even if it is possible, there is an inconvenience that the discharge amount for each cycle is small, and the diaphragm type pumping device has a problem that the pressure is low even if a large processing amount is guaranteed.

In order to cope with this, in many of the applicant's inventions of the prior application as shown in FIG. 2, since the pumping of a large amount of slurry under a high pressure condition is guaranteed, it is practically used as a powerful backup means for solid-liquid separation. It is becoming more and more popular.

That is, in the seed pressure feeding device 1, a swelling type of a drum-shaped casing 2 and lids 3 and 3 ′ at both ends thereof, which have a large base inside and are squeezed toward the front, The elastic film body 4 made of rubber or the like is installed in the casing 2 in a sealed state, and the inside of the casing 2 is divided into an inner pressure chamber 5 and an outer slurry suction / discharge chamber 6 so that the elastic film body 4 In order to prevent loss of shape retention at the time of contraction, a sleeve type support 7 is sandwiched between the inner surface of the front portion of the elastic film body 4 and the inner surface of one lid 3 ′, and the pressure chamber 5 is Is a suction port 8 for pressurized oil
Check valve 10 and hydraulic pump 11 are connected to the oil tank 13 via the electromagnetic valve 12, and the other suction port 9
Is a check valve 10 ', an oil pump 11' is an electromagnetic valve
12 'is connected to the oil tank 13 so that the pressurized oil 14 is supplied to and discharged from the pressurizing chamber 5, and the pressing force to the elastic film body 4 is applied and removed. On the other hand, the intake / exhaust ports 8'and 9'are connected to check valves 10, 10 ',
Slurry tank 17 for one side by electromagnetic valves 16 and 16 '
The other end was connected to the filter press 18 to suck and discharge the slurry 15.

<Problems to be Solved by the Invention> However, in the conventional pressure feeding device 1, as shown in FIG. 2, the pressure chamber 5 separated from the suction / discharge chamber 6 by the elastic film body 4 is Check valve 10, 10 'or solenoid valve 1
Although 2 and 12 'are installed, the oil tank 13
Therefore, when the expansion and contraction of the elastic film body 4 which operates at a high frequency causes fatigue over time, and unexpected damage occurs, the slurry 15 is discharged from the suction chamber 6 to the pressurizing chamber 5. There is a drawback that not only the oil may flow into the interior, but also the oil tank 13 may leak if the device is continuously operated, causing unexpected troubles to various hydraulic mechanisms.

Further, since a complicated hydraulic circuit is provided, there is a disadvantage that pressure oil is apt to leak in each mechanism portion, and valuable pressure oil is consumed, resulting in high cost.

Furthermore, two hydraulic pumps 11 and 11 'must be provided between the pressurizing chamber 5 and the oil tank 13, one on the pressurizing side and one on the exhausting side. However, there is a problem that it is difficult to make the pumping device as a plant by mounting it on a portable machine, etc. Also, there is a disadvantage that it is heavy and costly and maintenance is troublesome.

<Object of the Invention> An object of the present invention is to take advantage of a large-capacity, large-output pressure-feeding device equipped with a bulging elastic film body of the pressure-feeding device based on the above-mentioned conventional technique, but in the event of a trouble on the pressure side The problems of mechanical damage, large weight, and high cost of the above are technical issues to be solved, and even if an unexpected situation occurs even in an unforeseen situation with a simple structure based on a rational design, troubles may occur in the hydraulic path on the pressurizing side. In addition, since it has a simple structure, cost reduction can be achieved, maintenance is hardly required, and operating efficiency over time is increased, which is an excellent pumping device that benefits the field of using separation technology in various industries. Is intended to be provided.

<Means and Actions for Solving the Problem> In order to solve the above-mentioned problems, the structure of the present invention, which has the above-mentioned object in view of the above-mentioned object, separates a liquid to be treated such as a slurry into a solid-liquid by a pumping device. When pressure-feeding to a next-stage processing device such as a device, a bulging elastic film body having a base part interposed inside a drum type casing and having a shape narrowed toward the front side is provided on one outer side inside the casing. The pressurizing chamber and the other inner chamber for sucking and discharging the liquid to be treated are separated from each other. In the pressurizing chamber, a piston of a hydraulic cylinder directly connected to the casing and a set amount between the casing and the elastic film body are provided. When pressurizing oil is inserted in a sealed state and the hydraulic cylinder is moved forward or backward by a reciprocating actuator such as another hydraulic cylinder, the elastic membrane inserted in the casing is moved by negative pressure in the pressurizing chamber during the retracting operation. Slurry and other materials to be treated such as slurry in the suction and discharge chamber At the end of the stroke, the liquid is inhaled, and the shape retention of the elastic film body is maintained by closely adhering to a support such as a porous wire mesh provided outside the elastic film body on the pressure chamber side. When the hydraulic cylinder is advanced by the reciprocating actuator, the pressure in the pressure chamber rises, and the pressurized oil under high pressure causes the elastic film body to contract and the slurry or other material to be treated in the suction / discharge chamber is solid-liquid-treated by a filter press or the like. If the elastic membrane is damaged unexpectedly during operation by repeating the operation of pressure-feeding to the next-stage treatment equipment such as a separation device, the liquid to be treated from the suction / discharge chamber will be discharged between the elastic membrane and the hydraulic cylinder. This is a technical measure that allows only the pressurized oil to infiltrate, there is no leak to the complicated hydraulic system, and maintenance, inspection, repair, etc. can be performed promptly with less damage.

<Embodiment> Next, one embodiment of the present invention will be described below with reference to FIG.

It should be noted that parts that are the same as in FIG. 2 will be described using the same reference numerals.

The illustrated embodiment is a mode in which a slurry of a liquid to be treated such as a factory waste liquid is solid-liquid separated with high efficiency by a filter press 18.
Reference numeral 1'denotes a pumping device forming the center of the gist of the present invention,
The lid 3 at the front of the drum-shaped casing 2'is provided with a slurry tank 17, and an intake / exhaust port connected to the next-stage filter press 18 through check valves 10, 10 'and electromagnetic valves 16, 16'. 8'and 9'are provided, the base portion is wide between the lid body 3 and the casing 2 ', and a bulging rubber elastic membrane body 4 having a shape narrowed from the front is shown in FIG. The base is fastened together with the base interposed in a sealed manner in a manner opposite to that shown, and is separated into a pressurization chamber 5 outside the tip and an intake / exhaust chamber 6 inside the base. On the side, between the inner surface of the distal end of the elastic film body 4 and the inner surface of the lid body 3, there is interposed a support body 7 similar to a conventional sleeve type that maintains the shape retention of the elastic film body 4 at the time of contraction. ing.

On the pressurizing chamber 5 side, a bulging support similar to the porous elastic film body 4 made of a metal such as a wire mesh, which is outside the elastic film body 4 and regulates the posture at the stroke end thereof. Body 7 '
Is fixedly installed on the inner surface of the casing 2'with its base fixed, and a hydraulic cylinder 19 is integrally provided on the other lid 3 ', and its piston 20 and elastic film body 4 are provided. , And a predetermined amount of pressurizing oil 14 is hermetically sealed between the casing 2'and another hydraulic cylinder 21 for advancing and retracting the piston 20. ing.

A nipple 22 for sucking and discharging pressurized oil is provided on the upper portion of the casing 2'close to the lid 3 ', and on the lower side is provided with the pressurized oil 14 when the elastic membrane 4 is accidentally damaged. Inflowed slurry 15
And a nipple 23 for discharging the mixed liquid of the pressurized oil 14 is connected, and both nipples 22 and 23 are closed in a normal operating state.

Therefore, in the pressure feeding device 1 ', the pressure oil cylinder is
There are virtually no complicated hydraulic pipes and valves installed in 19, and the slurry system is cut off.

In the above configuration, the slurry 15 from the slurry tank 17
When the hydraulic cylinder 19 is moved to a filter press 18 under high pressure for solid-liquid separation, the piston 20 of the hydraulic cylinder 19 is moved by the other hydraulic cylinder 21 to move back and forth in a predetermined manner, the piston 20 and the casing 2 ', and Pressure chamber 5 of elastic film body 4
Since the pressurizing oil 14 inserted in a predetermined amount therein is a non-compressible fluid, the elastic film body 4 is interposed between the stroke ends of the elastic membrane body 4 through the porous support body 7'according to the back and forth movement of the piston 20. The slurry 15 is expanded and contracted, and a large amount of the slurry 15 is intermittently fed from the slurry tank 17 to the filter press 18 in a high pressure state via the check valves 10 and 10 '.

In the meantime, the elastic film body 4 is in close contact with the inner surface of the support body 7'at the full stroke and maintains the shape without any change in the posture,
At the end of the contraction stroke, the shape of the sleeve-type support 7 is maintained each time as the support 7 moves back and forth.

Then, the filter press 18 performs solid-liquid separation under high pressure as in the conventional mode.

Then, the piston 20 in operation of the hydraulic cylinder 19, or
The stroke end of the hydraulic cylinder 21 is detected in advance with the pressurized oil 14
Is constant, it is easy to mechanically design the stroke end and switch the other hydraulic cylinders 21 appropriately.

Since the elastic film body 4 repeatedly expands and contracts very frequently during operation, fatigue or the like is likely to occur over time, and therefore, the elastic film body 4 is dealt with this at an appropriate time. However, if a crack or the like unexpectedly occurs during that time, the slurry 15 in the suction / exhaust chamber 6 side may enter into the pressurizing chamber 5 side, but even in such a case, the piston 20 and Since the pressurized oil 14 between the elastic film body 4 and the elastic film body 4 is enclosed in a fixed amount,
No leak occurs outside the system, and only the pressurized oil 14 between the piston 20 and the elastic film body 4 is contaminated, and the detection device shown in many inventions of the applicants of the appropriate applicants is used. When the slurry 15 is detected, the entire apparatus is stopped and the lower nipple 23 of the pressurizing chamber 5 is opened to contaminate the pressurized oil 14
The mixed liquid of the slurry 15 and the slurry 15 is discharged and washed appropriately, the elastic film body 4 is replaced, the nipple 23 is closed, and a certain amount of fresh pressurized oil 14 is sealed by the nipple 22 for re-operation.

Therefore, even if there are complicated hydraulic circuits, 15 minutes of the contaminated slurry does not infiltrate into those systems, and it is not necessary to replace expensive equipment.

Needless to say, the embodiment of the present invention is not limited to the above-described embodiment, and various embodiments such as the support 7 in the suction / exhaust chamber 6 may be made of porous net are adopted. It is possible.

Further, it goes without saying that the slurry to be applied can be applied to other slurries of the slurry of factory waste liquid.

Of course, as a design change, the reciprocating actuator for the piston of the hydraulic cylinder may be a motor or the like in addition to the hydraulic cylinder.

Further, the pressure feeding device may be mounted on a truck or the like to make it portable.

<Effects of the Invention> As described above, according to the present invention, a pumping device having a bulging elastic film body having a wide base and a narrowed shape is basically provided inside a drum casing having lids at both ends. In this case, the inside of the casing is divided into an outer pressurizing chamber for pressurized oil and an inner chamber for sucking and discharging a liquid to be treated such as slurry, and a hydraulic cylinder is connected to the outside of one of the lids. When a reciprocating actuator such as another hydraulic cylinder is connected and a fixed amount of pressurized oil is sealed between the piston, the elastic membrane and the casing, the elastic membrane is unexpectedly cracked. Even if the liquid to be treated such as slurry in the inner suction chamber enters the pressurized oil in the outer pressure chamber due to the occurrence of such things as the liquid to be treated enters the complicated hydraulic circuit, the hydraulic pressure of the complicated circuit Does not damage or disable the device, and does maintenance The excellent effect of not having to repair or the like is achieved.

For pressurized oil that is contaminated with the liquid to be treated in the pressure chamber, only the pressure chamber inside the casing needs to be extracted and reprocessed or replaced with new pressure oil. It is easy to remove, the life of the device is drastically increased, and the initial cost at the time of manufacturing or assembling the device can be remarkably reduced.

Also, because the pressurized oil is sealed in the pressure chamber of the casing,
Since a complicated hydraulic circuit is not required, therefore, it can be used as a portable pressure-feeding device such as equipped on a truck, and the excellent effect that the range of action can be remarkably expanded is exhibited.

Further, by making it portable, the action range and the use range of the pressure feeding device of the present invention are dramatically increased, and there is also an advantage that it makes an extremely great contribution to waste treatment.

Further, since a bulging porous support similar to the elastic film body for the elastic film body is fixedly provided on the inner surface of the casing in the pressurizing chamber, even at the full stroke end of the elastic film body. The excellent effect that the shape retaining property is maintained and the damage does not occur is exhibited.

[Brief description of drawings]

FIG. 1 is a schematic sectional side view of a partial cross section of an embodiment of the present invention, and FIG. 2 is a schematic sectional side view of a conventional pressure feeding device. 1 '... pressure feeding device, 2 ... casing 4 ... elastic film body, 5 ... pressurizing chamber 6 ... suction / exhaust chamber, 7' ... support 14 ... pressurized oil, 19 ... hydraulic cylinder 21 ... … Reciprocating actuator

Claims (1)

[Claims] 1. An elastic film body interposed in a drum type casing having lids at both ends, and a pressure oil pressurizing chamber outside the elastic film body and an inside / outside liquid suction / exhaust chamber of the liquid to be treated inside the casing. In the pressure-feeding device, wherein the elastic film body is provided with a support for holding the shape of the elastic film body, the elastic film body has a wide base portion and is provided between one lid body and the casing. It is attached in a sealed state, the tip is squeezed to form a swelling type, the outside is a pressure oil pressurizing chamber, the inside is a suction and discharge chamber for the liquid to be treated, and the outside of the pressurizing chamber and the casing is formed. Pressurized oil is sealed between the hydraulic cylinders, and a reciprocating actuator is connected to the hydraulic cylinders. Thus, in the casing, the elastic membrane is made of a porous material similar to the elastic membrane on the pressure chamber side. A swelling support is attached and is fixed to the inner surface of the casing.