JPH0641752B2 - Pumping device structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The disclosed technology provides a detector for cracks and ruptures of a flexible film that expands and contracts inside a high-power pumping device used for solid-liquid separation of a slurry. Belong to the technical field of equipped structures.

<Summary of the Invention> Thus, the present invention has an inlet connected to a tank of a liquid to be treated such as a slurry and an outlet connected to a next-stage treatment device such as a filter press on one side of the casing and the other side. An oil cylinder for supplying / discharging the working oil to / from the casing is provided, while a rubber-made bulging flexible film is closely adhered at its end to separate the pressurizing chamber and the supplying / discharging chamber. In particular, the present invention relates to a pressure feeding device, and in particular, a pair of electrodes, which are antennas arranged in rows and columns in the leading end of an oil cylinder, are attached to a detector and connected to a detector. It is an invention relating to a pumping device configured to detect damage to a flexible film through conduction.

<Prior Art> As is well known, various kinds of feeding devices such as pumps are used in various industries from small capacity type to large high output type according to the application, and the structure is a plunger type. There are various types of diaphragms such as a conventional type and a diaphragm type, and the latter diaphragm type has the advantage that the discharge amount is large, and various types have been devised. As disclosed in the invention of JP-A-54-86803, the applicant does not have a high-pressure pumping type embodiment having a bulging flexible membrane made of rubber or the like. Since it has been put into practical use by the invention, it does not slide on the inner wall of the cylinder as compared with the plunger type, so consideration is given to the entry of foreign matter between the inner wall of the cylinder and the piston. There is no need to do it, it is convenient for maintenance,
It is frequently used and is being used effectively for sludge treatment and slurry treatment of factory waste liquid.

As for the driving of the pressure feeding device, the pressure feeding device is constantly used, and therefore, the expansion and contraction of the pressurizing chamber (generally used and performing stable operation under normal use conditions) is planned. It is equipped with a jar type oil pump.

<Problems to be Solved by the Invention> However, in the above-described conventional type pressure feeding device, since a flexible membrane of a bulging type such as rubber is used and high-pressure operation is repeatedly performed, it is natural that However, although the flexible film has a pressure resistant structure, since it repeatedly expands and contracts under high pressure, it undergoes repeated elastic deformation and deteriorates over time, which may cause cracks and ruptures. In order to cope with this, although the flexible film is provided with a support for shape retention that can be freely articulated in a reduced posture, it is prevented from being deformed, but a crack or a rupture occurs. If it occurs, the operation will not be performed normally, the slurry will enter the operating oil side, and the performance of the mechanism that circulates the operating oil at high pressure will be hindered, resulting in difficulty in its normal operation. Yes, and infiltrate the pipeline equipment by injecting a mixture such as slurry. There is a problem that it will happen.

Therefore, in general, the internal mechanism of the pumping device itself is not visible from the outside, and the flexible membrane repeats reciprocating expansion / contraction motions in response to the operation of the piston of the oil cylinder, and is subjected to expansion action and high pressure, so the durability of the material Since there is a limit to this, it is necessary to anticipate cracks, ruptures, and the like, and to cope with this, a device for detecting cracks and ruptures must be provided to prevent damage to the pumping device itself.

In order to deal with this, there is a technique for detecting by providing a pair of parallel electrodes, for example, as disclosed in the invention of Japanese Utility Model Publication No. 48-15841.

However, such a detection means has a disadvantage that the detection cannot be performed immediately or cannot be performed depending on the leak portion.

<Object of the Invention> An object of the present invention is to solve the problems of the pumping device structure for the slurry leak based on the above-mentioned conventional technique, and to quickly crack or rupture the flexible film regardless of its location. In order to ensure reliable electrical detection, then immediately stop the pumping device and quickly respond to subsequent maintenance processing such as flexible membrane replacement and cleaning. It is intended to provide an excellent pumping device that is beneficial.

<Means and Actions for Solving the Problem> In order to solve the above-mentioned problems, the structure of the present invention, which is based on the above-mentioned object, is intended to solve the above-mentioned problems. The hose from the tank of the liquid to be treated such as the slurry is connected to the inlet provided on one side of the casing of the pressure feeding device, and the hose connected to the next stage processing device such as the filter press is provided on the casing. A flexible expansion membrane made of rubber, which is connected to the outlet and expands and contracts inside the casing of the pump when the pump is used to pump the liquid to be treated, has its base end portion covered by the casing and the lid of the casing. Is set in close contact with and fixed to the seal by means of the flexible film, and the flexible membrane separates the chamber for sucking and discharging the liquid to be treated from the pressurizing chamber, and the oil is provided on the other side of the casing in communication with the pressurizing chamber. Cylinder The piston is expanded and contracted by advancing and retracting, and the liquid to be treated is pressure-fed through the working oil.Therefore, the inside of the tip of the casing of the oil cylinder extends to the inner peripheral region and conducts wires. Also, a pair of antenna-shaped electrodes arranged in a row are provided so as to face each other, and are electrically connected to a detector such as a lamp or a buzzer so as to be covered with slurry or the like in a non-conductive hydraulic oil. If the treatment liquid is conductive and the flexible membrane is cracked or punctured due to deterioration over time during its operation, the liquid to be treated such as slurry enters the pressurization chamber through the cracks. In addition, the liquid to be treated comes into contact with a pair of antenna-shaped electrodes of the cylinder casing and is energized by the backward movement of the piston of the oil cylinder, whereby the breakage of the flexible membrane is immediately detected, and the lamp or the When a detector such as a buzzer is activated, pressure feeding Repairing the location, therefore, it is that taken technical means normally pumping device is to be able operate.

<Embodiment> An embodiment of the present invention will be described below with reference to the drawings.

In the embodiment shown in FIG. 4, 1 is a pumping device that forms the center of the invention, and a slurry inlet 5 is provided at the end of a drum type casing 2 and a slurry tank 5 is provided with a check valve 4. Through a predetermined pipe, and a slurry discharge port 6 is also provided side by side through the check valve 4'and connected to the filter press 7 through a predetermined pipe.

The other end of the casing 2 is an open end provided with a flange 8, and a rubber bulge set by being closely joined to the entire circumference of the flange 8 and laterally extended into the casing 2. The flexible film 9 of the mold is provided in a pressure-proof airtight manner by tightening together with the flange 8 and the lid body 10 forming the other side of the casing 2 by bolting or the like. film
Inside and outside of 9 is the suction and discharge chamber of slurry 11 and non-conductive hydraulic oil
It is surrounded by a pressure chamber filled with 12.

The tip of an oil cylinder 13 is integrally connected to the other end of the casing 2 via a lid 10 at the side, and the capacity of the oil cylinder 13 communicates with the pressurizing chamber and the capacity of the oil cylinder 13 is the flexible film 9. Elastically expands and contracts, sucking the slurry 11 in the casing 2,
It has a sufficient capacity for discharging, and the operation of the piston 14 is performed by an appropriate drive device such as a motor via a crank or the like (not shown).

Further, a swelling metal perforated plate 9 ', which is similar to the flexible film 9 so that the flexible film 9 comes into contact with the flexible film 9 from the outside during contraction, is provided inside the casing 2 as a support for shape retention. It is fixed by welding to the flexible film 9 so as to prevent the flexible film 9 from bending when it contracts.

Thus, the conductive rings 15 and 15 'are fitted to the inner peripheral surface of the lid 10 provided at the portion where the piston 14 in the oil cylinder 13 does not come into contact even at the full stroke end, via the pair of insulating rings 15 ". The rings 15, 15 'are provided with a large number of appropriate conductors in parallel over the entire inner surfaces of the rings 15, 15' as shown in FIGS.
The conductive wires of are arranged in rows and columns with a relative phase difference of 90 °, and the electrodes 16 are formed in an antenna shape.
Further, the rings 15 and 15 'are connected to a buzzer 18 via a detector 17 which is insulated from each other by an insulating ring and is connected to the outside of the casing 2 of the oil cylinder 13 by an appropriate lead wire.

Since the working oil 12 is non-conductive, it does not have conductivity with the electrodes even when the piston 14 reciprocates, so that the working oil 12 can flow through smoothly.

Further, the oil cylinder 13 is provided with a drain hole 19 for removing the working oil 12 in the pressurizing chamber and a plug bolt 20 is sealed.

In the above configuration, when the pumping device 1 is used for operation, the flexible film 9 is contracted by the depressurization of the working oil 12 by the depressurization of the pressurization chamber due to the retreat of the piston 14, and the slurry is supplied to the supply / discharge chamber of the casing 2. Check valve 4 open from tank 5
Slurry 11 is sucked in through suction port 3 via
As the piston 14 advances, the pressure chamber is pressurized through the operating oil 12, the flexible membrane 9 swells, the check valve 4'opens, and the slurry 11 flowing into the casing 2 is discharged.
It is sent from 6 to the filter press 7 through the check valve 4 '.

Since the flexible film 9 that repeats the expansion and contraction movement following the operation of the piston 14 operates under high pressure, the durability of its material has a limit with time, and then unexpectedly cracks. If a crack or a hole occurs, the slurry 14
The slurry 11 enters the working oil 12 in the pressure chamber through the cracks and punctures in the flexible membrane 9 when inhaling the supply / discharge chamber, and pollutes it. Electrode 16 installed in the entire communication port to the pressurizing chamber at the tip of 13
Reaching the antenna of the electrode 11 due to the conductivity of the slurry 11
The antenna is energized and the detector 17
Activates the buzzer 18.

Therefore, at that time, the cracks and ruptures of the flexible film 9 can be surely known from the outside, the pumping device 1 is stopped, and the oil 12 contaminated with the slurry 11 in the pressurizing chamber is removed by the bolt 20 and the drain hole. Remove from 19 and remove the bolt of the lid 10,
9 will be replaced and repaired, and it will be put into operation again.

It should be noted that the embodiment of the present invention is not limited to the above-described embodiment, and for example, the detector is provided with an automatic drive stopping device for the hydraulic cylinder to stop the pumping device by connecting the device, A mode in which maintenance can be performed thereafter is also possible, and there is no change in the operation and effect of the present invention.

Further, the antenna electrode wire is laid on the surface along the surface of the bulging type porous plate for shape retention, the supporting ring of the conductive wire is insulated and provided on the lid, and the lead wire is connected from the outside. Various modes can be adopted, such as one pole and the other plate can be formed as an electrode using the porous plate.

<Effects of the Invention> As described above, according to the present invention, basically, by providing an electrical detector for cracks and punctures in a flexible film, a compressing device having the flexible film expands and contracts while receiving high pressure. If the flexible membrane subjected to exercise exceeds its durability limit and unexpectedly develops cracks or punctures that require maintenance, it is possible to quickly take adaptive measures and damage the oil cylinder, etc. Before performing, the specified maintenance, maintenance and replacement can be performed to prevent the failure of the entire pumping device and to ensure normal operation until the detector is activated for cracks or punctures that cannot be seen from the outside. That is an excellent effect.

Further, in the case of detecting cracks or ruptures of the flexible film, according to the present invention, the advance / retreat of the piston of the oil cylinder guides the oil to the entire area of the pair of electrodes arranged in rows and columns. Therefore, regardless of which portion of the flexible film of the liquid to be treated leaks, the conductivity of the slurry can be utilized, so that leak detection can be achieved by providing the matrix-shaped electrodes in the antenna type, and The excellent effect that the cost in the case of damage can be dealt with at low cost is exhibited.

[Brief description of drawings]

1 is a front view of an electrode antenna, FIGS. 2 and 3 are front views of respective electrodes, and FIG. 4 is a partial sectional view of a pumping device. 1 …… pressure feeding device, 2 …… casing, 3 …… slurry inlet, 6 …… slurry outlet, 9 …… flexible membrane, 13 …… hydraulic cylinder, 16 …… electrode, 17 …… detector

Claims (1)

[Claims] 1. An oil cylinder having a swelling type flexible membrane which has a slurry inlet / outlet on one side of the casing and which separates an oil pressure chamber and a slurry supply / discharge chamber from inside the casing. In a pumping device provided at the other end of the casing in communication with the pressurizing chamber, a pair of electrodes in which conductors are arranged as rows and columns as antennas are provided inside the tip of the oil cylinder. The pumping device structure is characterized in that it is connected to the.