JP2933087B2 - Pumping device structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The disclosed technology belongs to the technical field of the structure of a pumping device used for treating slurry such as factory waste liquid or sludge.

<Summary of the Summary> In the invention of this application, a swelling type flexible film is interposed in a casing while being supported, and the inside of the casing is supplied with a hydraulic pressure generating device by the inside of the flexible film. Pressurized through the draining action,
The invention relates to a pressure-feeding device structure in which a slurry such as a high-viscosity fluid is sucked and discharged into a casing outside a flexible membrane, and is pressure-fed to a solid-liquid separation device such as a filter press. And a plurality of pumping device units are arranged in parallel, so that a piston of the cylinder is provided in a protruding manner inside the flexible film, and is capable of moving forward and backward in the expansion and contraction direction of the flexible film. The pressurization is actuated by the hydraulic oil sealed in the pressurized chamber formed in the flexible membrane, and the piston rod is connected to the link in a seesaw manner, and the displacement of the reciprocating movement is opposite. A synchronizer that alternately supplies and discharges slurry to and from the solid-liquid separator is controlled so as to continuously perform high-pressure pumping. Discharging device is provided an invention a change in the pressure condition of the slurry according to the pumping device structures do not occur.

<Conventional technology> As is well known, waste treatment, waste oil, and sludge are dumped in large quantities at production plants of various industrial plants, and their treatment has been regarded as important as a countermeasure against pollution that is inevitably involved in industrial development. Among others, the technology of solid-liquid separation for the treatment of the slurry in the form of mud, the treatment of solids by predetermined incineration and landfilling, and the reuse of liquids as appropriate are widely adopted. A pumping device used for processing has a large capacity, high output, and high durability in terms of processing capacity and the like.

For example, as shown in FIG. 4, as the seed pumping apparatus, the pumping apparatus 1 of the applicant's various prior inventions and inventions has come into wide use, and the seed pumping apparatus is provided in a drum type casing 2. Hydraulic fluid 5 is supplied to and discharged from the swelling type flexible film 3 made of rubber or the like by a hydraulic pressure generator 4, and the flexible film 3 is pressurized from the inside to expand and contract in a cycle to form slurry or the like. The liquid to be treated 6 is absorbed from the slurry tank 7 into the casing 2 and is fed to the next processing apparatus 8 such as a filter press through the swelling of the flexible film 3.

Furthermore, in order to increase the processing speed, the pumping device 1 is provided with a plurality of pumping device units 9, 9 ', for example, two units 9, 9' are arranged side by side through a bracket 10 in parallel to form a casing 2. The volume of the guide rod 1 is substantially increased, and the supply / discharge operation is performed by a guide rod 1 connected to the inside of the flexible membrane 3 by a flow treatment or the like.
1, 11 'are connected to each other via a link 12 in a seesaw manner,
Synchronized from its alternating behavior, and
The timing of switching between supply and discharge
The direction control valve 16 of the hydraulic pressure generating device 4 is switched via the operation control device 15 so that the dog 13 provided at the swinging end of 12 is detected by the proximity switches 14 and 14 '. .

<Problems to be Solved by the Invention> However, if the slurry 6 contains a gas or the like, the capacity of the slurry 6 changes in the casing 2, that is,
Is supplied and discharged directly at a predetermined pressure in a pressurized chamber 17 formed in the casing 2 and the flexible membrane 3, so that the inflow amount of the hydraulic oil 5 always corresponds to the pressure inside the slurry chamber 18. It is not constant, and therefore, as shown in the illustrated embodiment, the pumping unit 9
When a plurality of 9's are arranged in parallel, the volumes of the pressurized chambers 17 and 17 'cannot be balanced, and the flexible membrane 3 is not uniformly swelled due to partial crushing or the like. Further, the flexible films associated with the advancing and retracting operations of the guide rods 11, 11 'connected to the respective flexible films 3
The drawbacks are that the 3,3 'shape cannot be retained, expansion and contraction cannot be performed normally, the synchronizing function using the link 12 is impaired, and alternating and continuous supply / discharge operations are significantly impaired. was there.

Furthermore, since the compression is repeatedly performed at a high pressure in the casing 2 by the operation of the pressure feeding device 1, the guide rod 11
There is an inconvenience that excessive pressure is applied to the connecting portion between the flexible film 3 and the flexible film 3, and the flexible film 3, 3 'is deformed, deteriorated, and damaged.

<Object of the Invention> The object of the invention of this application is to solve the problem at the time of the supply and discharge operation of the liquid to be treated in the pumping device structure based on the above-mentioned conventional technology, and is discarded at various factories and construction sites. In high pressure feeding of slurry such as waste liquid and sludge, the liquid to be treated is efficiently supplied and discharged, and the plunger and flexible membrane can stably advance and retreat or expand and contract in the casing in various industries. It is an object of the present invention to provide an excellent pumping device structure that can be used in pollution control technology.

<Means and Actions for Solving the Problems> In accordance with the above objects, the configuration of the invention of the present application, which has the scope of the above-mentioned claims, is a swelling type flexible material made of rubber or the like in order to solve the above-mentioned problems. A cylinder is integrally formed on one side of a casing in which a membrane is interposed, and a discharge device for gas mixed into the slurry is provided near the other side of the casing, and two or more pressure feeding device units are provided. A plurality of cylinders are arranged in parallel and arranged in parallel, and the suction and discharge ports of each cylinder are connected to an input / output port of a hydraulic pressure generator, and hydraulic oil is sealed in a pressurized chamber defined by a flexible membrane and a piston. The expansion and contraction of the expanding flexible membrane of the pressurized chamber is performed through the reciprocation of the piston, and the flexible membrane is uniformly and stably expanded and contracted by the hydraulic oil fixed in quantity, and Connect the slurry tank to the suction port provided on the other side, and At the end of each cylinder, a next-stage processing device such as a solid-liquid separation device such as a filter press is connected, and at the tip of each cylinder, a metal supporting net for the flexible film is imitated according to the flexible film. A cylinder is provided in a bulging shape so as to prevent the occurrence of cracks due to the generation of wrinkles at the time of contraction of the flexible film.
Further, the suction and discharge of the slurry of the casings arranged in parallel by alternately synchronizing the suction and discharge of the casings arranged by connecting the piston rods of the respective cylinders by a link as a mechanism for performing a synchronizer action in a seesaw manner, etc. Technical measures were taken to increase the throughput and to smoothly feed a large amount of slurry under high pressure.

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

The same parts as those in FIG. 4 are described using the same reference numerals.

Reference numeral 1 'denotes a pumping device, which forms the center of the gist of the invention of the present application. In contrast to a general plunger type pump which has two steps per cycle, a pumping device unit 9,
9 'is provided in plural and two in this embodiment are arranged in a parallel arrangement so that pulsating and alternating pumping can be continuously performed.

Thus, on one side 2 'of each drum type casing 2, each cylinder tube 19 is integrally formed substantially at the center and is provided so as to protrude inside the flexible film. A socket 22 having a piston 20 inserted therein and a piston rod 21 inserted therein is fitted at the base end thereof, and an iron support net 23 is mounted at the distal end thereof.

The supporting net 23 is provided so as to maintain the shape of the flexible film 3 with respect to a reduced posture of the flexible film 3 described later.

Further, the cylinder tube 19 is provided with a supply / discharge port 24 for the hydraulic oil 5 at one side, and a control device 15 of a predetermined hydraulic pressure generating device 4 is connected via an appropriate pipe.

A flange 25 is provided at the opening on the other side 2 ″ of the casing 2.
Are provided integrally, and a rubber-made bulging-type flexible membrane 3 is provided with its bulging portion facing the other side 2 "of the casing 2 and abutting against the flange 25 at a hem portion. The casing 2 is supported by being sandwiched between a lid portion on one side 2 ′ of the casing 2.

A suction port 26 and a discharge port 27 for the liquid to be treated are provided at predetermined positions on the bottom of the other side of each casing 2, and the suction port 26 is connected to a check valve 28 via an appropriate packing. And connected to the slurry tank 7.

A check valve 2 is provided at the outlet 27 on the other side 2 "of the casing 2.
8 'is interposed and connected to a filter press 8 as a solid-liquid separation device via a predetermined pipe.

A predetermined amount of hydraulic oil 5 ′ is filled in a pressurizing chamber 17 defined by one side 2 ′ of each casing 2, the flexible membrane 3, and the piston 20. As a result, the hydraulic oil 5 ′ flows in and out under pressure to expand and contract the volume in the pressurized chamber 17, whereby the movable membrane 3 expands and contracts and the volume of the slurry chamber 18 changes. You.

The above-mentioned pumping device units 9, 9 'are of the same shape, and each casing 2, 2 is fixed to each other via a bracket 10, and a plurality (in this embodiment, twin) type of pumping device 1' is provided. Have been.

The free ends of the piston rods 21, 21 'are
The pistons 20, 29 'are respectively connected to the cylinders 19, 19' by a link 12 which is pivoted in a seesaw manner.
The reciprocation is controlled synchronously in the opposite directions.

It is needless to say that the link point is linked by the slit pin mechanism so that the connecting point of the piston rod 21 does not fluctuate when the link 12 swings.

Then, regarding the forward / backward stroke control of the pistons 20, 20 ', the dog 13 provided at one swing end of the link 12 is detected by the proximity switches 14, 14', and the control device 15 is operated.
The directional control valve 16 of the hydraulic pressure generator 4 connected to the control device 15
Is performed by switching.

The hydraulic pressure generating device 4 controls the hydraulic oil 5 supplied from the oil tank 30 via the pump 30 to a constant pressure by the relief valve 32 and changes the direction of the directional control valve 16 to the cylinders 19 and 1.
The hydraulic fluid 5 is supplied between the hydraulic pressure generating device 4 and each hydraulic pump 9 by moving the pistons 20 and 20 'at a predetermined speed. It is meant to be circulated.

During the discharging process of the pumping unit 9 ', the slurry 6
When air bubbles or the like are mixed in the flexible film 3 ', the air bubbles do not pass through the discharge port 27' and stay above the slurry chamber 18 'in the process of expanding the flexible film 3'. Although there is an inconvenience that the pressure of the slurry changes due to not being discharged due to swelling, as shown in FIG. 3, the slurry is provided near the suction ports 26 and 26 'on the other side 2 "of the casing 2. Chamber 3 of gas exhaust device 31
The gas is compressed and packed into the inside 2 so that the discharge valve 33 is discharged when the valve is closed via a control device (not shown) at an initial stage of the next supply / discharge process.

Then, at a predetermined timing, the discharge valve 33 of the gas discharge device 31
Is closed, the hydraulic oil 5 'presses the inside of the flexible membrane 3' by the advance of the piston 20 ', and the flexible membrane 3' swells strongly,
The pressurized chamber 17 'changes in volume and presses the slurry 6 in the slurry chamber 18' to a pressurized state, and is discharged from the discharge port 27 'by opening the check valve 28' via a control device (not shown). ,
The slurry 6 is pumped to the filter press 8 in a predetermined manner.

The gas in the chamber 32 of the gas discharge device 31 is discharged in a predetermined manner by opening a solenoid valve 35 provided in the discharge pipe 34.

In the above configuration, when the slurry 6 containing high-viscosity bubbles as the liquid to be treated is pumped to the filter press 8 as a solid-liquid separation device using the pumping device 1 ′, the pump 30 Is activated, the hydraulic oil 5 is supplied to the supply / discharge port 24 of the cylinder 19 on one side in the initial state of the direction control valve 16, the piston 20 advances, and the hydraulic oil 5 is recovered from the cylinder 19 'on the other side. The piston 20 'retreats.

Then, when the link 12 connecting the piston rods 21 and 21 ′ alternately swings in a seesaw manner and the dog 13 is detected by the proximity switch 14, the control device 15 switches the direction control solenoid valve 16. Switching, as shown in FIG. 2, the hydraulic oil 5 flows into the other cylinder 19 'through the suction / discharge port 24', and the pressure oil in the one cylinder 19 is discharged.

Here, on the upper side of the figure, the check valve is
28 is opened, and the check valve 2 is
It is assumed that the valve 8 'is opened and the slurry 6 is supplied and discharged.

Thus, the pistons 20, 20 'pressurize the hydraulic oil 5' sealed in the large-capacity pressurizing chambers 17 in the direction in which the flexible membrane 3 'swells, and the flexible membrane 3' becomes uniform. Then, the volume of the slurry chamber 18 outside the flexible membrane 3 'is reduced to discharge the slurry 6 to the filter press 8.

In this process, the piston 20 'of the other cylinder 19'
The piston 20 of the cylinder 19 on one side is connected by a link 12 as a synchronizer, and its displacement is suppressed in mutually opposite directions, but is operated synchronously and alternately. In the device unit 9, the piston 20 retreats with the suction / discharge port 24 of the cylinder 19 being drained, the hydraulic oil 5 is returned to the oil tank 29 by the direction control valve 16, and the operation in the pressurizing chamber 17 is performed with the retraction of the piston 20. The oil 5 'flows into the cylinder 19, the flexible film 3 in the swelling position contracts, and the volume of the slurry chamber 18 is increased.

On the other hand, in the suction process of the pumping device 1 ', a predetermined amount of the slurry 6 flows into the casing 2 of the pumping device 1' due to the reduced pressure of the slurry chambers 18, 18 'caused by the retreat of the flexible films 3, 3'. You.

In the process of contracting the flexible films 3, 3 ', a cylinder 19 is formed in a protruding shape inside the flexible film 3, 3'.
Along with the metal support net 23 disposed at the tip of the 19, the generation of the folded state and the crack of the flexible membrane 3, 3 ″ is prevented, and the slurry supply / discharge function is sufficiently maintained. Is done.

As mentioned above, the pumping device 1 'is a two pumping device pump.
Each of the pressurized chambers 17, 17 'of 9, 9, 9' is filled with a predetermined amount of hydraulic oil 5 'and connected to and linked to the link 12 while expanding and contracting the flexible membranes 3, 3'. The pistons 20, 20 'of the slurry chambers 18, 20' are alternately operated synchronously and alternately.
Even if the volume at 8 ′ changes mutually due to the mixed gas, the gas is discharged from the gas discharge device 31, so that the pressure-receiving state does not fluctuate, and the flexible membrane 3, Shape retention is reliably maintained without deformation of 3 '.

Then, the above-described process is repeated, and the pumping device unit
9, 9 'are alternately sucked and discharged from the slurry 6, and the slurry 6 is continuously pumped to the filter press 8 in a large amount to perform solid-liquid separation.

Incidentally, it is needless to say that the embodiment of the invention of this application is not limited to the above-described embodiment. For example, as a design change example, stroke detection can be freely controlled using a pressure valve instead of a proximity switch, Further, the number of the pressure feeding device units is not limited to two, and a plurality of three or more pressure feeding device units can be freely arranged. Further, various modes such as a three-prong type link can be freely used.

<Effects of the Invention> As described above, according to the invention of this application, basically, two or more pumping device units are juxtaposed, and when the flexible film contained in each of the pumping device units expands and contracts, the supply and discharge are performed. Since the process phase is reversed and synchronized, the slurry of the liquid to be treated is sucked and discharged alternately to increase the processing capacity, and the slurry is continuously and stably filtered. An excellent effect of being fed to the next processing apparatus such as a press is exerted.

Then, a predetermined amount of hydraulic oil is filled in each of the pressurizing chambers of the plurality of pumping device units, and the hydraulic oil is sealed in the inside of the flexible membrane while each piston linked to the link moves forward and backward. As the fluid flows, the flexible film does not deform when the slurry is pumped as in the past, regardless of the state of the viscosity of the processing solution or the presence or absence of mixed gas,
Even the mixed gas is extracted by the gas discharge device provided at the end of the casing, so that there is no problem that the expansion and contraction of the slurry chamber in the casing can be changed with a constant volume. And there is no difference in pressure, and an excellent effect is obtained that shape retention is sufficiently maintained and smooth pressure feeding is reliably performed.

Further, since the durability of the flexible film is enhanced by maintaining the shape retention of the flexible film, there is an advantage that maintenance of the pumping device is easy.

Furthermore, a metal support net for the flexible membrane is provided in a bulging shape from the tip of the cylinder, so that the flexible membrane can be prevented from entering the cylinder when contracted, wrinkles can be prevented, and cracks and the like can be prevented. There is no generation, and an excellent effect of maintaining the function over time and improving durability is achieved.

Further, since the cylinder is provided in a protruding shape inside the flexible membrane, an excellent effect is obtained that the folding of the flexible membrane during contraction is prevented in cooperation with the support net.

In addition, since the supporting net is provided in a bulging shape from the tip of the cylinder, a relatively small supporting net can be used. The weight can be reduced, the equipment can be easily installed, the cost is low, and the maintenance is easy. The effect is achieved.

[Brief description of the drawings]

1 to 3 are explanatory views of an embodiment of the invention of the present application. FIG. 1 is an overall schematic sectional view, FIG. 2 is an overall schematic sectional view in an operating state, and FIG. 3 is a partially enlarged sectional view. FIG. 4 is an overall schematic cross-sectional view of the prior art. 2 ... casing, 4 ... hydraulic pressure generator, 16 ... input / output port (directional control valve), 2 '... one side of casing, 7 ... slurry tank, 8 ... filter press (solid-liquid separation device), 2 "
... the other side of the casing, 3,3 '... flexible membrane, 1,1' ... pumping device, 19,19 '... cylinder, 20,20' ... piston, 12 ... synchronizer (link), 9,9 '... casing Unit, 2
1,21 '... Piston rod 23 ... Support net, 31 ... Gas discharge device

Claims (3)

(57) [Claims] 1. The other side of a casing connected to an input / output port from a hydraulic pressure generator and connected to one side of a casing containing a cylinder having a piston and a pipe from a slurry tank to a solid-liquid separator. In a pumping device structure in which a plurality of pumping device units in which a swelling-type flexible film is interposed are provided, the cylinder is protruded in the longitudinal direction following the inside of the flexible film, A metal supporting net for the flexible membrane is formed integrally with the base of the cylinder in a bulging manner at the tip of the cylinder, and a gas discharging device for gas mixed with slurry near the other side of the casing. Are provided, and the pistons of the cylinders are freely movable in the direction of expansion and contraction of the flexible membrane, and the cylinders of the plurality of pressure feeding device units are provided side by side through the connection of the synchronizer. Pumping device structure that. 2. A cylinder according to claim 1, wherein the cylinders of said pumping unit are arranged in parallel.
Item 3. A pumping device structure according to the item. 3. The structure of claim 2, wherein said synchronizer is a link connected to a piston rod of each of said cylinders.