JP2937286B2 - Slurry pumping equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The disclosed technology relates to a high-output pumping device used for separating waste liquid from various production products or slurry such as sludge of agricultural and livestock products by solid-liquid separation using a high-pressure filter press or the like for disposal. Belongs to the technical field of construction.

[0002]

2. Description of the Related Art As is well known, the prosperity of various industries has remarkably added to the improvement of civil society, but recently, as has been highlighted, causes pollution problems and separates them from environmental harmony problems. It is impossible to consider only the development of pollution. Therefore, pollution prevention and environmentally harmful technologies cannot be ignored for each industry. Among them, chemical mechanical technologies such as crushing, mixing and separation which are the core technologies of pollution prevention technologies Is becoming increasingly important.

[0003] In the disposal of various types of industrial waste, techniques such as landfill and destruction have been developed for a long time. Technology is extremely important.

[0004] Slurries are the most common form of industrial waste, and large-sized filter presses and the like are used as means for efficiently separating the slurry into solid and liquid to reduce the volume. Widely used.

In such a solid-liquid separation device such as a large filter press, in order to subject the slurry to solid-liquid separation, it is necessary to feed the slurry to the solid-liquid separation device such as the filter press in a large capacity and at a high pressure. It is important also from the viewpoint of efficient operation.
There is the invention of Japanese Patent Publication No. 2 and the like, and a large-capacity and large-output pumping that is incomparable with a conventional diaphragm-type pumping apparatus is possible, and plays a large role in the construction industry and the food industry with high efficiency.

Various improvements have been made to such a pumping apparatus. For example, a slurry pumping apparatus 1 as shown in FIG.
In this case, the lids 3 around the drum-shaped casing 2
3 'makes the casing 2 hermetically sealed, and a spindle type elastic film body 4 made of rubber or the like having a predetermined thickness is integrally fixed to the base between the casing 2 and one of the lids 3 integrally. The elastic membrane 4 is provided in the casing 2 to form a supply / discharge chamber 5 for hydraulic fluid such as oil, so that fatigue and cracks are not caused by repeated folding action when the elastic membrane 4 contracts. For example, a support 6 such as a metal mesh body or the like is made substantially similar in shape to the elastic film body 4, and the elastic film body 9
Are set together on the casing 2 and the lid 3 together, while a slurry supply / discharge chamber 7 is formed outside the elastic membrane 4 between the casing 2 and the casing 2, and the hydraulic fluid supply Oil as hydraulic fluid is supplied from the oil tank 10 to the discharge chamber 5 from the oil tank 10 via the switching valve 8 through the lid 3.
The elastic membrane 4 is supplied and discharged through the supply and discharge ports 11, 11 'of
On the other hand, a predetermined slurry 13 in the slurry tank 12 is sent to the filter press 16 via the check valves 14 and 14 'through the supply and discharge ports 15 and 15'. Thus, a predetermined solid-liquid separation process has been performed.

[0007]

The slurry pumping apparatus 1 having the spindle type elastic membrane 4 is different from the conventional flat or convex lens diaphragm pumping apparatus. Although the elastic film 4 has a large amount of expansion and contraction and thus has the advantage of having a large output and a large capacity pumping function, the operating pressure is large, so that the elastic film 4 When the breakage occurs, there is a disadvantage that the slurry 13 penetrates into the oil of the working fluid and makes it impossible to continuously use the expensive oil of the working fluid, and the piping system such as the switching valve 8 and the oil pump 9 has a disadvantage. There is a problem that may cause a trouble. To cope with this, the casing 2 is opened regularly or irregularly, and the elastic membrane 4 is opened from the lid 3 'side.
Although it is possible to perform a maintenance operation such as checking the operation, there is a disadvantage that the operation efficiency of the pumping device 1 is deteriorated and the solid-liquid separation efficiency of the filter press 16 is reduced.

[0008]

SUMMARY OF THE INVENTION It is an object of the invention of this application to provide a pumping apparatus having a spindle-type rubber-made elastic film or the like according to the above-mentioned prior art through accidental breakage due to high-frequency repeated use of the elastic film. The technical problem to be solved is that the slurry is mixed into the working fluid such as oil and the like. While taking full advantage of the high output of the spindle type elastic membrane, the potential elastic membrane can be removed. In order to cope with the possibility of breakage, the elastic film has a redundant function to prevent the slurry from being mixed into the working fluid even in an unforeseen situation, and to quickly detect the breakage of the elastic film. In addition, it is an object of the present invention to provide an excellent slurry pumping apparatus which can take countermeasures and benefit the field of pollution control technology in various industries.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the construction of the invention of the present application for solving the above-mentioned problems is discharged from various industries such as factory effluents. When the slurry is subjected to solid-liquid separation by a high-pressure filter press or the like, using a pressure-feeding device having a spindle-type elastic film body whose tip is formed in a bulging shape,
The spindle-type elastic film body made of rubber or the like provided in the casing of the pressure feeding device is supplied with and discharges a hydraulic fluid to a supply / drain chamber inside the spindle-type elastic film body so that the elastic film body expands and contracts. Another elastic membrane body is provided symmetrically opposed in the casing, and one of the elastic membranes which expands and contracts by the working fluid by interposing a minimum amount of incompressible fluid such as water or oil between the two elastic membrane bodies. The other elastic membrane is expanded and contracted through the fluid rigidity of the incompressible fluid, and the slurry from the slurry tank is pumped to a filter press or the like with a large capacity and high output, and the predetermined solid-liquid separation action is efficiently performed. Therefore, in a repetitive operation over time, a support such as a mesh body is inserted into the elastic film body so as not to cause fatigue, cracks, breakage, etc. in the elastic film body on the slurry pumping side. The elastic membrane on the working fluid side performs a redundant function in case of cracks In this case, the slurry is mixed into the incompressible fluid between the two elastic membranes, whereby the transparency of the incompressible fluid is reduced. The optical sensor attached to the nipple for refilling the incompressible fluid, detects the leak of the slurry to the incompressible fluid optically and immediately in real time, stops the pumping device, and takes the required countermeasures. And maintenance of the elastic membrane,
At the time of inspection, maintenance, etc., a nipple for appropriately supplying and discharging the incompressible fluid to and from the casing is provided.
In the lower part of the slurry supply / discharge chamber, a sludge reservoir is provided, and technical measures are taken so that the sludge stored by a shutter or the like can be forcibly discharged by a plunger or the like.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG.

The same parts as those in FIG. 2 are described using the same reference numerals.

In the illustrated embodiment, a slurry 13 discharged from a factory or the like of various machinery and equipment manufacturing industries
The pressure feeding device 1 ′ is provided with lids 3, 3 ′ for sealing the casing 2 on both sides of the drum-shaped casing 2. A spindle type elastic film body 4, 4 'made of rubber or the like has a mesh type similar support body 6, 6' inside thereof and is fixedly fastened to the casing 2 together. In order to prevent the occurrence of cracks and ruptures due to folding at the time of contraction, an incompressible fluid 19 such as clear water or the like which is as transparent as possible is sealed inside the casing 2 at opposing portions thereof. Further, nipples 18 and 18 'for supplying and discharging the incompressible fluid 19 are provided at upper and lower portions of the casing 2 so as to be opposed to each other. 19, light is transmitted therethrough and its transparency is set. Detected immediately degrees optically, and,
When the slurry 13 is mixed into the incompressible fluid 19 due to breakage or cracking of the elastic film body 4 on one side, its light transmittance decreases. When the slurry 13 drops below the set transmittance, the leak of the slurry 13 immediately, that is, In addition, it is possible to detect a trouble such as a crack or break of the elastic film body 4.

The inside of the elastic film body 4 on one side is a slurry supply / discharge chamber 7, and the cover 3 is provided with supply / discharge ports 15, 15 ′ for slurry 13, and check valves 14, 1.
One side is connected to the slurry tank 12 and the other side is connected to the filter press 16 via 4 'so that the slurry 13 can be pressure-fed to the filter press 16 to perform predetermined solid-liquid separation.

A supply / discharge chamber 5 for oil as a working fluid is formed in the other elastic film body 4 ', and the oil is supplied by a switching valve 8 through supply / discharge ports 11 and 11' provided in the lid 3 '. Connected to an oil tank 10 via pumps 9 and 9 ',
The elastic film body 4 'is expanded and contracted, and the other elastic film body 4 is expanded and contracted via the incompressible fluid 19, so that the slurry 13 is fed to the filter press 16 by pressure.

Reference numeral 17 denotes a predetermined control device built in the computer, which is capable of controlling the operation of each mechanism, including a set transmittance detection operation by an optical sensor.

Then, in accordance with the input program, the one elastic membrane 4 'is expanded / contracted with oil via the control device 17 to expand / contract the other elastic membrane 4 via the incompressible fluid 19, and An optical sensor (not shown) built in the nipples 18 and 18 'reduces the opacity due to a decrease in light transmittance below a set transmittance due to mixing of the slurry 13 into the incompressible fluid 19 due to cracking or breaking of the elastic film body 4. Detection is made so that crack generation or breakage of the elastic film body 4 is quickly detected.

A sludge reservoir 20 is formed below the end of the slurry supply / discharge chamber 7 to store the sludge via gravity sedimentation in the slurry supply / discharge chamber 7 by opening and closing an electromagnetic shutter 22. The plunger 21 can intermittently discharge and remove the sludge appropriately, so that the capacity of the slurry supply / discharge chamber 7 can be prevented from lowering.

In the above configuration, the oil pumps 9, 9 'and the like are operated via the control device 17 while the slurry tank 12 and the filter press 16 are connected to the pressure feeding device 1', and the switching valve 8 is operated. By oil tank 1
By supplying / discharging the oil from 0 to the hydraulic fluid supply / discharge chamber 5 at a predetermined pressure, the elastic film body 4 ′ on one side expands and contracts, and the elastic film body 4 on the other side is The slurry 13 is expanded and contracted to supply the slurry 13 from the slurry tank 12 to the supply / discharge port 15,
It is fed to the filter press 16 via 15 '.

In a state where the operation is normally continued, the slurry 13 from the slurry tank 12 is fed to the filter press 16 through the slurry supply / discharge chamber 7 by pressure.
With time, the sludge gravitationally settles in the slurry supply / discharge chamber 7, and since the shutter 22 is normally opened, the sludge which is going to settle through the inclination of the base of the elastic film body 4 becomes sludge pool 20. At a predetermined timing, the control device 17 closes the shutter 22 so that the plunger 21 discharges and removes the sludge from the sludge pool 20, thereby maintaining the sludge pool function.

By the way, as described above, the elastic film 4 is inevitably fatigued by the repetitive pumping of the slurry 13 over time, and the expansion is prevented by the supports 6, 6 'during expansion and contraction. Although cracking is prevented,
There is no guarantee that such cracks or breaks will not occur at one end, and unexpectedly, if such cracks or breaks occur, the slurry 13 immediately leaks into the clear water 19 as an incompressible fluid and mixes. In order to reduce the transparency of the slurry 13 mixed in the clarified water 19, the nipple 1
The light sensors disposed at 8, 18 'lose their light transmittance, and the control device 17 immediately detects the mixing of the slurry 13 into the clarified water 19 via the elastic film body 4. Therefore, the control device 17 immediately starts the filter press 1.
6 are stopped, and the pumping of the slurry 13 from the slurry tank 12 to the filter press 16 is stopped.

Of course, the expansion and contraction of the elastic film body 4 'on the other side is also stopped.

During this time, a leak trouble is warned by the operation of a buzzer or a patrol light (not shown), and an appropriate maintenance operation is performed.

Therefore, mixing of the working fluid of the slurry 13 with the oil is prevented, and contamination of expensive oil and troubles in the oil system such as the switching valve 8 and the pumps 9 and 9 'are reliably prevented, and a countermeasure is taken. I can do it.

Then, all the functions are stopped and the nipple 1 is stopped.
8 and 18 'are removed together with the optical sensor, the lid 3 is removed, and the damaged elastic membrane 4 is repaired, inspected, maintained, replaced, and other predetermined reliable maintenance is performed.

Although there is no probability that the elastic film 4 'on the other side will be broken at the same time as the elastic film 4 on the one side, there is no possibility that the elastic film 4' is elastically deformed. The film body 4 'can be dealt with by using a double system or the like.

As a design change, the optical sensor may be provided in the casing separately from the nipple instead of being provided inside the nipple.

The support is provided not only on the inside but also on the outside of each elastic membrane so as to prevent the elastic membrane from being folded during expansion and contraction, and further prevent the elastic membrane from being broken or cracked. It is possible to achieve this.

Therefore, according to the invention of this application, even if cracks or breakage occur on the side of the elastic film body for pressure feeding of the slurry, the filtering of the slurry is performed until the leak of the slurry is detected by the optical sensor by expansion and contraction of the elastic film body for the working fluid. The supply and discharge pressure feeding to the press 16 can be continued and maintained.

[0029]

As described above, according to the invention of this application, it is possible to pump a slurry with a large capacity and a high pressure when performing a solid-liquid separation of a discharged slurry by a filter press or the like in basically various industries. In addition, the other spindle-type elastic film body of the same spindle type in which the swelling portion is expanded and contracted with respect to the one-side spindle-type elastic film body by the other hydraulic fluid provided to face the surface of the elastic film body symmetrically. The elastic film body can expand and contract the elastic film body for slurry pumping through an incompressible fluid such as clear water filled between the two elastic film bodies, and a backup function of the elastic film body for slurry pumping. An excellent effect of being able to carry out a redundant action having

Since the two elastic membranes are disposed opposite to the bulging portions in plane symmetry, the amount of the incompressible fluid to be interposed between the two elastic membranes can be reduced, and an unexpected state can be achieved. However, there is an advantage that the amount of the incompressible flow rate to be exchanged can be reduced.

In addition, by utilizing the light permeability of an incompressible fluid such as clear water filled between the two elastic membranes, if an unexpected crack or break occurs in the elastic membrane, the Slurry is mixed with the incompressible fluid and the transparency is reduced. Immediately without any visual observation, a sensor of low transparency below the set transmittance can be electrically and accurately detected by a sensor, and all devices are stopped. However, an excellent effect is obtained in that responsive measures can be taken without fail.

Further, the sludge which separates and settles the sludge in the elastic film by the repetitive action and causes the elastic film to be worn, cracked, broken or the like due to expansion and contraction is discharged to the lower portion of the slurry supply / discharge chamber. The sludge stored in the sludge pool can be discharged and removed by the forced discharge mechanism such as a plunger through opening and closing of the shutter through the opening and closing of the shutter, thereby improving the life of the elastic film for slurry pumping. An excellent effect of being able to be performed is exhibited.

[Brief description of the drawings]

FIG. 1 is an overall schematic diagram of a partial cross section of an embodiment of the present invention.

FIG. 2 is a schematic partial cross-sectional view of a pumping device based on the prior art.

[Explanation of symbols]

 Reference Signs List 2 drum type casing 4 elastic film 7 slurry supply / discharge chamber 6 support 1 'slurry pumping device 4' other elastic film 5 hydraulic fluid supply / discharge chamber 19 incompressible fluid 8,8 'nipple 20 sludge pool 12 elastic film Body 11 Sludge forced discharge mechanism 17 Controller

Claims (2)

(57) [Claims] 1. A swelling type elastic film body having a base integrally fastened to a closed drum type casing is formed in a slurry supply / discharge chamber inside the swelling type elastic film body. In the slurry pumping device equipped with a body, the other elastic film body is disposed in a non-contact manner facing the one elastic film body, and the bulging portion is arranged in a plane-symmetrical manner, and the base portion is formed as The slurry is integrally fastened to the casing, the inside of which is formed in the working fluid supply / discharge chamber, and the incompressible fluid is interposed and filled between the two elastic membranes, so that the slurry leaks into the incompressible fluid. The optical sensor is electrically connected to the control device and is exchangeable via a nipple.Thus, a sludge pool is formed below the base of the slurry supply / discharge chamber, and a shutter is provided in the sludge pool. When attached,
A slurry pumping device, wherein a sludge forced discharge mechanism is attached to the sludge pool. 2. A slurry according to claim 1, wherein a support for the expansion and contraction posture of said elastic film is provided inside said casing also inside said another elastic film. Pumping equipment.