JPH0635870B2 - 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 a device that pressure-feeds a liquid to be treated such as a slurry to a solid-liquid separation device of a filter press.

<Summary of Summary> Therefore, the invention of the present application is such that the hydraulic chambers provided on both sides of the barrel of the hydraulic cylinder respectively have corresponding bulging type elastic membranes, and the main body of the liquid to be treated is fed through the hydraulic passage. In particular, the hydraulic cylinder has a pair of hydraulic chambers of equal capacity on both sides of a central hydraulic chamber via partition walls, and these three hydraulic pressures are connected to each other. Each piston provided in the chamber is integrally connected by a rod, the hydraulic chambers on both sides are connected by a bypass passage, the central hydraulic chamber is connected to an oil tank via a hydraulic pump, and the hydraulic chambers on both sides are connected to an oil tank. An opening / closing valve such as an electromagnetic valve is provided in each of the passages to which it belongs, and a sensor for stroke detection is provided in each of the hydraulic cylinder and the main body of the liquid to be treated liquid feed unit, which is electrically connected to the control unit. Pumping equipment The apparatus is an invention relating to a portable pressure-feeding device such as a truck having an elastic film and partitioning a liquid suction and discharge chamber to be treated and an oil chamber.

<Prior Art> As is well known, with the development of various industries, the treatment of slurries such as sludge that is discharged and discarded has become a major pollution problem. There is a need for a high-pressure pumping device that can be processed. For example, instead of a simple diaphragm-type pump or the like, although it is a diaphragm type as seen in many of the applicant's inventions of the earlier applications, a bag-shaped bulge A high-pressure pumping device with a type of elastic membrane has been developed and put into practical use, and the main body of the hydraulic pumping device used for it has also been studied and developed to a practical stage. ing.

Thus, in a large-scale plant in which these pumping device bodies are connected to a filter press or the like, the hydraulic pumping device that operates the pumping device bodies also becomes large in size, which makes the plant inevitable. Is coming.

Therefore, development of a mobile general-purpose type pressure feeding device main body has been desired.

<Problems to be Solved by the Invention> By the way, in the movable type pressure-feeding device main body, a portable type pressure-feeding device such as a truck is also required due to its size, so that the structure is simple and easy to operate. Although the demand for them is increasing, a portable type compact pumping device capable of meeting the demand has not been developed so far.

Further, the pressure feeding device connected to the pressure feeding device main body is generally of the hydraulic cylinder type, but there is a drawback that a complicated control device is required when the initial stroke of the piston of the hydraulic cylinder is set at the time of initial installation. However, there is a disadvantage that the cost is high even though it is portable as a result, and there is also a drawback that management control and maintenance are complicated.

<Object of the Invention> An object of the invention of the present application is a technical problem to be solved of the problems of the portable pumping device based on the above-mentioned prior art, and it is portable, compact and simple in structure, and at the initial stage. Easy to set, closed hydraulic circuit, little oil leak, and smooth connection and disconnection of the liquid to be processed from the main body of the pressure supply device. It is intended to provide a device.

<Means / Action for Solving the Problem> In order to solve the above-mentioned problems, the structure of the invention of the present application, which is based on the above-mentioned object and has the above-mentioned claims as a gist, is a portable compact type pumping device. An opening / closing valve such as an electromagnetic valve provided in a hydraulic passage that connects the pair of hydraulic chambers provided on both sides of the barrel of the hydraulic cylinder to the pumping device body for the liquid to be treated is closed, and a pair of hydraulic chambers provided on both sides are closed. Oil is supplied from an oil tank via a hydraulic pump to one of the pressure chambers enclosed by the piston in the central hydraulic chamber, and oil pressure is applied from the other pressure chamber. When returned to the tank and the pistons of the hydraulic chambers on both sides that are integrally connected to the pistons of the central hydraulic chamber via rods advance, the oil in the pressure chambers of equal volume inside the hydraulic chambers on both sides is bypassed. Communicating The oil in the outer pressure chamber moves through the passage so as to be discharged and sucked to the oil tank, and one of the hydraulic chambers on both sides is filled with a sufficient amount of oil for the initial setting. , The corresponding pumping device main body is connected through the hydraulic passages of the hydraulic chambers on both sides to reciprocate the piston of the pumping device, and the pair of pumping device main bodies are alternately operated in the forward and reverse directions to suck the slurry and the like, thereby solid-liquid Ejection to the separating device is performed, and these strokes, alignment, and synchronous operation are performed by a technical device that is controlled by a control device via a stroke sensor.

<Embodiment> Next, one embodiment of the invention of this application will be described below with reference to the drawings.

Reference numeral 1 denotes a pressure-feeding device that forms the subject of the invention of this application, and is designed to be connectable to the liquid-feeding device main bodies 2, 2 to be treated, which are shown in many prior inventions of the applicant. In addition, the outer side slurry chamber 4 on one side of the bulging type rubber bag-shaped bulging elastic film 3 provided inside the barrels of the liquid to-be-treated liquid body 2, 2 is A slurry tank 8 is connected by a passage 6 via a three-way switching valve 5, and a filter press 9 is selectively connected by a passage 7 so that suction and pressure feeding of the slurry are alternately performed.

In addition, a slidable sleeve type support 10 for expanding and contracting the elastic film 3 is provided in the pressure chamber 4 ′ on the other side of the elastic film 3 of each processed liquid pressure-feeding device main body 2 so as to expand and contract the elastic film 3. It is configured so as to avoid bending and folding in the retracted posture and to have shape retention so as not to cause fatigue damage and the like, and is connected to the pressure feeding device 1 via the hydraulic passage 11.

Thus, in the pressure feeding device 1, a pair of partition walls 15, 15 provided between the lids 14, 14 on both sides of the barrel 13 of the hydraulic cylinder 12 has a central hydraulic chamber 16 and both hydraulic chambers. One rod in which the pistons 18 are slidably provided in the respective hydraulic chambers 16, 17 and 17 and have the same capacity and are separated from each other and are inserted through the seals of the partition walls 15 and 15. The central hydraulic chamber 16 is separated from the pressure chambers 20, 20 on both sides by the central piston 18, and the oil inside the hydraulic chambers 17, 17 is separated from each other by the central piston 18. Chamber 21, outer pressure chamber
The oil chambers 21 and 21 are separated from each other by a partition wall 15.
The bypass passage 24 communicates with the port 23 formed in the.

The outer pressure chambers 22 of the hydraulic chambers 17 on both sides are connected to an oil tank 28 from a port 25 provided in the lid 14 through a passage 27 having an electromagnetic opening / closing valve 26 interposed therebetween.

Further, the pressure chambers 22 outside the hydraulic chambers 17 on the respective sides are connected to the hydraulic pressure of the pumping device main body 2 by an appropriately known coupling 31 having an opening / closing valve via a hydraulic passage 30 having an electromagnetic opening / closing valve 29. The passage 11 can be freely connected and disconnected.

Further, the pressure chambers 20 and 20 on both sides of the central hydraulic chamber 16 have ports 32,
A hydraulic passage 35 via a switching passage 34, a hydraulic passage 35 via a switching valve 34, and an oil tank 28 by a hydraulic pump 36 via a switching valve 34. A pair of partition walls 15 and 15 have a predetermined stroke sensor 38 for a piston 18. ', 38' are provided.

37 is a predetermined control device, and each pumping device main body 2
The sensor 38 for the elastic membrane 3 and the stroke sensor 38 'for the piston 18 provided on each partition wall 15 of the hydraulic cylinder 12 and the electromagnetic on-off valves 26, 29, the switching valve 5, and the switching valve 34 are predetermined. Each is connected via a cable to control.

In the pumping device 1, the mechanical portion shown by the two-dot chain line is
For example, a hydraulic passage 1 is provided in a pair of processed liquid pressure-feeding device main bodies 2 and 2 which are loaded on a truck or the like and moved, and which are juxtaposed to a filter press 9 provided in a predetermined slurry processing factory or the like.
The connection can be dissociated by means of 1 and 11.

In the above configuration, the pressure feeding device 1 loaded on a truck or the like
Is a well-known peripheral having hydraulic valves 30, 11 of the hydraulic chambers 17, 17 on both sides of the hydraulic passages 11, 11 of the liquid-feeding device main body 2, 2 of the slurry treatment plant of a predetermined portion. Correspondingly connected and coupled via the coupling 31 so that oil does not leak, the pressure passages 11 and 30 are connected with the open / close valve in the closed position.

In the connected state, the control device 37 controls each hydraulic passage.
The electromagnetic valve 29 of 30 is in a closed state, so that the hydraulic chambers 22 on both sides of the hydraulic cylinder 12 are substantially not in communication with the pumping device main bodies 2.

The switching valve 5 and the control device 37 are electrically connected to each other by a pin jack or the like.
The switching direction is confirmed by the direction mark of the valve lever, but such a technique can be easily designed by those skilled in the art at the time of the invention of this application.

Therefore, in such a connecting posture, the pistons 18 are not generally in the state of reaching the stroke end, and therefore, the solenoid valves 26 are opened via the control device 37 and the switching valve 34 is operated in a predetermined manner. Then, the oil from the oil tank 28 is pressure-fed to the pressure chamber 20 on either the left or right side of the central hydraulic chamber 16 via the hydraulic pump 36, and the oil in the other pressure chamber 20 is returned to the oil tank 28. Then, the piston 18 of the central hydraulic chamber 16 advances from the midway position to the one partition wall 15 side at a slow speed, and the stroke sensor at the stroke end thereof.
Detected at 38 '.

During this time, the oil chambers 17 on both sides, the oil chambers 21 inside the 17,
The oil of 21 moves from one side to the other side through the ports 23, 23 and the bypass passage 24, and a suction negative pressure is formed in the outer pressure chambers 22 of the hydraulic chambers 17, 17 on both sides. Oil tank 28
Oil from the relevant pressure chamber is passed through the electromagnetic valve 26 and port 25.
22 is filled up with oil, and oil is supplied from the other pressure chamber 22 to the oil tank 28 via the electromagnetic valve 26 and the port 25 through the passage 27.
The stroke end of the piston 18 is detected by the stroke sensor 38 'in that state and the control device 37
Thereby, the switching valve 34 is switched to the neutral posture, and the initial set state is completed.

Incidentally, in the initial setting posture, the control device 37 causes the pair of processed liquid pressure-feeding device main bodies 2, 2 via the switching valves 5, 5.
The slurry chamber 4 on one side is filled with the slurry from the slurry tank 8 in advance, and the slurry chamber 4 of the pressure-feeding device main body 2 on the other side is empty.

Therefore, the control device 37 closes the open / close valves 26, 26 to open the open / close valves 29, 29, and the outer pressure chambers 22, 22 of the hydraulic chambers 17, 17 on both sides of the hydraulic cylinder 12 respectively have hydraulic passages 30,
The elastic film 3 of the liquid main body 2 of the liquid to be processed corresponding to 11
When the switching valve 34 is switched there, the piston 18 of the central hydraulic chamber 12 is opened.
Oil is pressure-fed from the hydraulic passage 33 to the pressure chamber 20 on the stroke end side of each of the pistons 18 through the hydraulic pump 36, and each piston 18 moves to the forward state, so that the slurry to be filled in the slurry chamber 4 is pressure-fed. Oil is supplied from the pressure chamber 22 to the pressure chamber 9 of the elastic film 3 of the apparatus main body 2 and hydraulic pressure is applied thereto, and negative pressure is generated in the hydraulic chamber 9 of the other liquid-to-be-processed liquid feed apparatus main body 2 to generate a three-way valve. Under the control of the control device 37 of 5, 5, the slurry from the slurry chamber 4 of the one pumping device body 2 is pumped to the filter press 9, and the slurry from the slurry tank 8 is the slurry chamber 4 of the other pumping device body 2. Is sucked into the tank and filled up, and the central hydraulic cylinder
Stroke sensors 38 ', 38' of 12 bulkheads 15 are pistons
Although the straw end of 18 is detected, when the sensor 38 of the lid of the pumping device main body 2 detects the bulging stroke end of the elastic film 3, the control device 37 switches the switching valve 34 and the pressure of the central hydraulic chamber 12 is detected. The central hydraulic cylinder 12 operates in reverse by switching between the pressure feeding of oil to the chambers 20 and the return of oil to the oil tank 28, and the pair of treated liquid pressure-feeding device main bodies 2 and 2 are alternately controlled to be slurries. A large amount of the slurry from the tank 8 is continuously pumped alternately to the filter press 9 at high pressure.

The posture of each elastic film 3 at the time of contraction is maintained in a bag shape due to the expansion and contraction of the support body 10, no bending or folding occurs, and fatigue damage over time does not occur.

Incidentally, during this time, it goes without saying that the oil in the oil chambers 21, 21 inside the hydraulic chambers 17, 17 on both sides of the central hydraulic cylinder 12 are alternately communicated via the bypass passage 24. Is.

In addition, the expansion and contraction stroke of the elastic film 3 of the liquid-feeding target device 2 and the alignment of the stroke of the central hydraulic cylinder 12,
The synchronization is surely performed by the control of the sensor 38 and the stroke sensor 38 'through the stroke end detection of the stroke sensor 38' via the control device 37 and the rod 19.

Then, when the pressure feeding of the slurry to the filter press 9 is completed, the pressure feeding device 1 is again removed from both the pressure feeding device bodies 2 and 2 via the couplings 31 and 31 and moved to the next processing plant by a truck, contrary to the above process. Let

Of course, the switching valve 34 in the middle of the movement is kept in the neutral position.

Since the hydraulic circuit is a kind of closed circuit regardless of whether the pumping device 1 is in operation, during transportation, or during connection and connection, there is no risk of oil leak or the like, but unexpected oil leak occurs. In this case, as described above, the initial setting of the stroke with respect to the initial central hydraulic chamber 12 allows the initial setting of the pressure feeding device 1 to be surely revealed, and no problem occurs.

It should be noted that the embodiment of the invention of this application is not limited to the above-mentioned embodiment, and various embodiments such as a lamp blinking operation at each stroke end of the piston can be adopted. Is.

Also, the application is not limited to slurry processing equipment, it is also used for pumping chemicals, water, etc., and there are various designs such as changing the design so that the rods of the hydraulic chambers on both sides are of the double rod type. Can be adopted.

<Effects of the Invention> As described above, according to the invention of the present application, in a pumping device that supplies hydraulic oil to a pumping device body for pumping slurry to a solid-liquid separation device such as a filter press, the working piston is always initially set. Since it can be set at a position by using the pressure feeding device itself, an excellent effect that it can be a portable device type to be loaded on a truck or the like is exhibited.

Thus, since the device has three hydraulic chambers at the center and both sides thereof, there is an effect that the initial setting can be performed only by operating the switching valve for the central hydraulic chamber, there are few failures, and maintenance and maintenance are also performed. The effect is that the initial setting is always easy and flexible when connecting to the main body of the pressure feeding device.

Also, in order to connect the hydraulic chambers on both sides to the oil tank through the switching valve in the hydraulic passage, the switching valve is opened in the initial setting posture and closed by connecting it to the main body of the pumping device. Also, an excellent effect that the operation of alternately switching the pair of pumping device main bodies can be surely performed is exhibited.

In addition, since the entire device can be made compact, it can be used for a slurry processing device of a small-scale plant, etc. as long as the design can be downsized, and the utility value for pollution control devices in the construction industry, etc. is increased. The effect is played.

Thus, the stroke detection sensor is provided in each of the hydraulic cylinder and the processed liquid pressure-feeding device main body and electrically connected to the control device, so that the pistons of the respective hydraulic chambers and the pressure-feeding device main body that are integrally connected via the rod are provided. There is an effect that the matching operation and the synchronous operation are surely performed.

Further, the hydraulic chambers on both sides of the hydraulic cylinder are connected to an oil tank by a closed circuit hydraulic circuit, and further, the hydraulic chambers on both sides are made equal in volume, and the inner hydraulic chambers defined by the pistons are connected by a bypass passage. As a result, the hydraulic circuit can be closed, oil leakage can be suppressed, and the cycle operation can be reliably performed, which is an excellent effect.

[Brief description of drawings]

The drawings are explanatory views of one embodiment of the invention of this application, and are schematic mechanism drawings. 1 ... Pressure feeding device, 17 ... both hydraulic chambers, 12 ... hydraulic cylinder, 2 ... Processing liquid pressure feeding device main body, 11 ... hydraulic passage, 16 ... central hydraulic chamber, 18 ... piston, 19 ... Rod, 24 …… Bypass passage, 36 …… Hydraulic pump, 28 …… Oil tank, 26 …… Open / close valve

Claims (3)

[Claims] 1. A portable type in which two hydraulic chambers on both sides are formed in one hydraulic cylinder via a partition wall and are connected to and detached from a corresponding separately provided main body of a liquid-feeding device for liquid to be treated via a hydraulic passage. In the pumping device, the hydraulic chambers on both sides have the same capacity, and a central hydraulic chamber is provided between them, and the pistons of the hydraulic chambers are linked by one rod. The inner oil chamber provided is connected by a bypass passage, an oil tank is connected to the central hydraulic chamber via a hydraulic pump, and an opening / closing valve is provided in each passage connected from the oil tank to the hydraulic chambers on both sides. The processing liquid pressure-feeding device main body, which has the above-mentioned hydraulic cylinder and a bulging type elastic film and separates the processing liquid suction / discharge chamber and the oil chamber from each other, can be freely connected / disconnected through a hydraulic passage through a coupling. Cylinder and liquid pump for processing liquid Electrically connected to pumping device of the variable general formula, characterized by that the control device is provided a sensor for stroke detection in and. 2. The pumping device according to claim 1, wherein the bypass passage is openly connected to both side hydraulic chambers across a partition wall of the hydraulic chambers. 3. The pressure feeding device according to claim 1, wherein the opening / closing valve is provided in a passage connected to the hydraulic chambers on both sides and the body of the processing target liquid feeding device.