JP5650705B2 - Filtration device - Google Patents

Description

  The present invention relates to a filtration device having a liquid removal function.

  Sludge, such as chips, settles in the coolant tank used in machine tools. In order to take this sludge out of the tank, the sludge is scraped off from the bottom of the tank to the outside of the tank over the upper edge of the tank. A conveyor is provided, and sludge is scraped out of the tank by this conveyor (see, for example, Patent Documents 1 and 2).

JP 2007-296467 A JP 2011-010555 A

  The sludge scraped to the outside of the tank by the conveyor is disposed of as industrial waste, but this sludge contains a large amount of coolant liquid, which increases the weight and costs for industrial waste treatment. Since liquid such as coolant liquid contained in the sludge is also taken out from the tank, the amount of consumption of this liquid increases, so that it is necessary to drain the sludge.

  This invention is made | formed in view of such a point, and it aims at providing the filtration apparatus which has a liquid removal function.

The invention described in claim 1 is a pump that pumps up a liquid containing sludge in a tank, a cyclone separator that centrifuges and sludges the sludge from the liquid while swirling the liquid discharged from the pump, and A sludge pot that collects sludge precipitated in this cyclone separator and discharges it from the lower discharge port, and a passage connected to the discharge port of this sludge pot is opened in the filtration step and a liquid removal step The on-off valve that closes, the gas-liquid permeable filter that also functions as a sludge container that contains sludge separated from the liquid connected to the on-off valve, and the external air connected to the upstream side of the filter element a check valve that allows to aspirate within, data of liquid after sludge removal flowing out from the top center of the cyclone separator A switching valve that selects one of the two return passages to return to the fluid, and a negative pressure that is provided in one of the return passages selected by the switching valve and that occurs around the liquid flow An ejector having a gas suction port capable of communicating with the downstream side of the element of the gas-liquid permeable filter, and the switching valve has an ejector in a filtration step of opening the on-off valve. Filtration having a function of switching between a state in which the return passage on the side not provided is selected and a state in which the return passage on the side in which the ejector is provided is selected in the dewatering step for closing the on-off valve to operate the ejector Device.

請 Motomeko 2 invention described, the gas-liquid transmission type filter in the filtration apparatus of claim 1 Symbol mounting comprises a container-like filter casing body to be taken out to the filter case body from the filter case body And a provided bag filter element.

According to a third aspect of the present invention, in the filtration device according to the first or second aspect , the pump, the cyclone separator, the sludge pot, the on-off valve, the filter, the switching valve, and the ejector can be moved. Are integrated into a unit.

According to the first aspect of the present invention, the liquid contained in the sludge separated from the liquid in the tank by the cyclone separator and collected in the gas-liquid permeable filter is returned from the cyclone separator to the tank. Since the vacuum discharge is performed by the suction force of the ejector that works by the liquid flow, the sludge can be efficiently discarded in the solid state after the liquid removal treatment. As a result, industrial waste treatment costs can be reduced and the working environment can be improved, and the liquid contained in the sludge can be recovered in the tank after being separated from the sludge. The replacement frequency can be reduced. In addition, the switching valve selects the return passage on the side where the ejector is provided in the liquid removal step of closing the on-off valve from the state where the return passage on the side where the ejector is not provided in the filtration step of opening the on-off valve. When the sludge collected in the gas-liquid permeable filter is removed, the on / off valve is closed and the cyclone separator and sludge pot are disconnected from the filter. Due to the suction force of the ejector, the liquid contained in the sludge accumulated in the filter element passes through the filter element together with the air sucked into the filter from the check valve, and is sucked into the ejector. The liquid in the sludge in the filter is vacuum drained by the ejector so that high drainage efficiency can be obtained. In addition, the sludge discharged from the cyclone separator can be temporarily stored in the sludge pot during this liquid removal, so the sludge separation function of the cyclone separator can be continued even during liquid removal, and high filtration efficiency. Is obtained.

According to the invention 請 Motomeko 2 wherein, when disposing the sludge, to take out the bag filter element with respect to the container-shaped filter casing body, to easily discharge the sludge solid state from within the bag filter element Is easy to handle.

According to the invention of claim 3 , since the pump, the cyclone separator, the sludge pot, the on-off valve, the filter, the switching valve, and the ejector are integrated into a movable unit, it is compact and portable. Therefore, versatility is high and high workability is obtained.

It is a circuit diagram which shows one Embodiment of the filtration apparatus which concerns on this invention, (a) shows a filtration process, (b) shows a liquid removal process.

  Hereinafter, the present invention will be described in detail based on the embodiment shown in FIG.

  1 includes a pump 12, a cyclonic separator (cyclonic separator) 13, a sludge pot 14, an on-off valve 15, a gas-liquid permeable filter 16, and a switching valve 17. The ejector 18 and the pipe connecting them are attached to a carriage (not shown), and are integrated into a movable unit.

  The pump 12 is driven by an electric motor 12m and pumps up a liquid L including sludge in a tank T that collects coolant liquid (cooling liquid, lubricating oil) and the like of a machine tool. The pump suction port includes a tank A pipe 21 to be inserted into T is connected, and a pipe 22 to the cyclone separator 13 is connected to the pump discharge port.

  The cyclonic separator 13 includes a separator body 23 in which an inverted conical portion is integrally formed on the lower side of a cylindrical portion where a pipe 22 from the pump 12 is connected in a tangential direction, and an upper center of the separator body 23. A liquid outlet 24 is provided in the cylinder, and a cylindrical inner cylinder portion 25 having a lower end opened on the lower side of the liquid outlet 24 is concentrically attached. The liquid discharged from the pump 12 is separated from the separator body 23. The sludge is centrifugally separated from the liquid while swirling between the inner cylinder portion 25 and the inner cylinder portion 25 to be settled on the inverted conical portion, and the liquid after removal of the sludge is caused to flow out from the liquid outlet 24.

  The sludge pot 14 is a small container that is connected to the inverted conical portion of the cyclonic separator 13 and temporarily stores sludge precipitated in the cyclonic separator 13, and is attached to the lower end of the sludge pot 14. Is further provided with a discharge port for discharging sludge downward.

  The sludge pot 14 may be formed integrally with the lower part of the inverted conical portion of the cyclonic separator 13.

  The on-off valve 15 is provided in a passage between the discharge port of the sludge pot 14 and the gas-liquid permeable filter 16, and opens and closes the passage. Operate to close.

  The gas-liquid permeable filter 16 also serves as a sludge container for accommodating the sludge S separated from the liquid L and discharged from the on-off valve 15, and has an upper surface opening of a cylindrical container-like filter case body 26. The on-off valve 15 is attached to a filter case lid 27 connected via a flexible pipe such as a hose so that the filter case lid 27 can be opened and closed, and can be kept airtight. A possible bag filter element 28 is provided in the filter case main body 26, and a check valve 29 that allows external air to be sucked into the filter case main body 26 is connected to the filter case lid 27.

  The switching valve 17 is a branch point where a pipe 31 for returning the sludge-removed liquid flowing out from the liquid outlet 24 at the center upper part of the cyclone separator 13 to the tank T is branched into pipes 32 and 33 as two return passages. Is a manual three-way valve that selects one of these pipes 32 and 33. A return passage pipe 32 shown in the upper side of FIG.

  The ejector 18 has a gas suction port 34 that is provided in a return passage pipe 33 shown at the lower side of FIG. 1 and can suck a gas by a negative pressure generated around the liquid flow. The gas suction port 34 is communicated with the bottom surface portion of the filter case body 26 located downstream of the gas-liquid permeable filter 16 through the pipe 35.

  The discharge port of the ejector 18 is guided onto the tank T by the pipe 36. It is desirable that the lower end opening of the pipe 36 is opened on the tank T and is not inserted into the liquid L.

  The pipes 21, 32, and 36 inserted into the tank T can correspond to coolant liquid tanks of various machine tools by using flexible pipes such as hoses.

  Next, the function and effect of the illustrated embodiment will be described.

  As shown in FIG. 1 (a), in the filtration step, the on-off valve 15 is opened, and the switching valve 17 is operated so that the pipe 31 and the pipe 32 communicate with each other and the pipe 33 side is shut off. The pump 12 is driven by a motor 12m.

  When a liquid such as a coolant liquid in the tank T is pumped up by the pump 12 and supplied to the cyclone separator 13 from the tangential direction, the liquid is swirled at the outer peripheral portion of the inner cylindrical portion 25 of the cyclone separator 13. Therefore, the sludge in the swirling flow is centrifuged and settles below the inverted conical portion, and only the liquid after the sludge removal rises in the inner cylinder portion 25, and from the piping 31 to the switching valve 17 and the piping. Since it returns to the tank T through 32, the liquid in the tank T is purified.

  By adopting the cyclone separator 13, a high-precision filtration function capable of removing 90% or more of sludge S having a size of 10 μm or more can be obtained.

  The sludge that has settled in the lower part of the cyclonic separator 13 further passes through the sludge pot 14 and is accumulated in the bag filter element 28 of the gas-liquid permeable filter 16 through the on-off valve 15.

  When the accumulated amount of sludge S in the bag filter element 28 reaches a predetermined state, the process proceeds to the liquid removal step shown in FIG. 1B based on the timing or a signal detected by a sensor (not shown).

  In this liquid removal step, the on-off valve 15 is closed, and the switching valve 17 is switched to a state in which the piping 31 and the piping 33 are in communication and the piping 32 side is shut off.

  When a liquid flow that flows from the pipe 33 to the pipe 36 is generated by this switching operation, the ejector 18 is activated, and the air inside the filter case body 26 of the gas-liquid permeable filter 16 is sucked from the gas suction port 34 through the pipe 35. To do.

  Due to the suction force of the ejector 18, the liquid contained in the sludge S accumulated in the bag filter element 28 of the filter 16 passes through the bag filter element 28 together with the air sucked into the filter 16 from the check valve 29. Then, it is sucked into the ejector 18 through the pipe 35 and returned to the tank T through the pipe 36.

  The cyclone separator 13 continues to function even during the drainage, and the sludge separation function is continued while the sludge S discharged from the cyclone separator 13 is stored in the sludge pot 14, and then, as shown in FIG. When returning to the filtration step shown, the sludge S in the sludge pot 14 is introduced into the bag filter element 28 of the filter 16 through the open on-off valve 15.

  In this way, the sludge S accumulated in the gas-liquid permeable filter 16 is subjected to a liquid removal process by a kind of vacuum liquid removal method, so that the sludge S becomes a solid state.

  When collecting the sludge solid content, the filter case lid 27 is removed, the bag filter element 28 is taken out from the filter case body 26, and the sludge solid content is taken out from the bag filter element 28 and discarded.

  As described above, the filtration device 11 is a sludge by the ejector 18 that obtains a suction force by using a high-precision filtration function by the cyclone separator 13 and a flow rate that can be sufficiently secured even after passing through the cyclone separator 13. This is an integrated unit with the vacuum drainage function.

  The liquid contained in the sludge S separated from the liquid L in the tank T by the cyclone separator 13 and collected by the gas-liquid permeable filter 16 is returned from the cyclone separator 13 to the tank T. Since the vacuum drainage is performed by the suction force of the ejector 18 that works by the liquid flow, the sludge S can be efficiently discarded in the solid state after the drainage treatment.

  For this reason, industrial waste treatment costs can be reduced, the working environment can be improved, and the liquid contained in the sludge S can be recovered in the tank T after being separated from the sludge S, thus saving the consumption of the liquid L. It is possible to reduce the frequency of liquid replacement.

  In particular, while the sludge collected in the gas-liquid permeable filter is being drained, the on-off valve 15 is closed and the cyclone separator 13 and the sludge pot 14 are disconnected from the filter 16 and are in the filter 16. Since the liquid in the sludge S is vacuum drained by the ejector 18, high drainage efficiency can be obtained, and during this drainage, the sludge S discharged from the cyclone separator 13 is temporarily stored in the sludge pot 14. Since it can be stored, the sludge separation function of the cyclonic separator 13 can be continued even during liquid removal, and high filtration efficiency can be obtained.

  Also, when discarding the sludge S, the bag filter element 28 can be taken out of the container-like filter case body 26 and the sludge in a solid state can be easily discharged from the bag filter element 28. Is easy.

  Furthermore, the pump 12, the cyclone separator 13, the sludge pot 14, the on-off valve 15, the filter 16, the switching valve 17, and the ejector 18 are integrated into a movable unit so that it is compact and portable. Therefore, it can be moved to an arbitrary tank and used for filtering the liquid in the tank, so that it has high versatility and high workability.

  The present invention has applicability to business operators involved in the manufacture, sale or use of filtration devices.

T tank L liquid S sludge
11 Filtration equipment
12 Pump
13 Cyclone separator
14 Sludge pot
15 On-off valve
16 Gas-liquid permeable filter
17 Switching valve
18 Ejector
26 Filter case body
28 Bug filter element
29 Check valve
32, 33 Piping as return passage
34 Gas inlet

Claims (3)

A pump for pumping liquid containing sludge in the tank;
A cyclone separator that centrifuges the liquid discharged from this pump and precipitates sludge from the liquid;
A sludge pot that accumulates sludge precipitated in this cyclone separator and discharges it from the lower outlet,
An on-off valve provided in a passage connected to the discharge port of the sludge pot, and opening and closing the passage in the filtration step and closing the drainage step;
A gas-liquid permeable filter that also serves as a sludge container that contains sludge separated from the liquid connected to the on-off valve ;
A check valve connected to the upstream side of the element of the filter and capable of sucking outside air into the filter;
A switching valve for selecting one of two return passages for returning the liquid after removing sludge flowing out from the upper center of the cyclonic separator to the tank;
A gas suction port provided in one return passage selected by the switching valve and capable of sucking gas by a negative pressure generated around the liquid flow has the gas suction port. An ejector communicated with the downstream side of the filter element ,
The switching valve selects the return passage on the side where the ejector is not provided in the filtration step for opening the on-off valve, and the return passage on the side where the ejector is provided in the dehydration step for closing the on-off valve. And a function of switching the state in which the ejector is operated . The gas-liquid permeable filter
A container-like filter case body;
This was and a bag filter element which is provided to be removed from the filter case body in the filter casing body, characterized in claim 1 Symbol placement of the filter. The filtration apparatus according to claim 1 or 2 , wherein the pump, the cyclone separator, the sludge pot, the on-off valve, the filter, the switching valve, and the ejector are integrated into a movable unit.

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