JPH0332706A - Filter - Google Patents

Abstract

PURPOSE:To remarkably reduce the amt. of deposits to be sucked up and to improve the durability of the filter by fixing a cylindrical filter member having a closed conductor hole communicating with a suction pipe to a cover body opened at the lower part. CONSTITUTION:A liq. in a storage tank is sucked from an opening 9 at the upper part of the tank and filtered. The filter base body 4 of the filter is formed by the cover body 2 opened at the lower part, having a cylindrical shell 12 turned downward around the upper plate 11 and passing through the opening 9 and a filter member 3 having the conductor hole 5 communicating with the upper and lower parts and a passage gap G between the member 3 and the inner surface of the shell 12 and which is housed in the cover body 2 with the upper and lower parts of the hole 5 closed. A suction pipe 6 having upper and lower liq. passage ports 14 and 13 and passing through the opening 9 is fixed to the base body 4 with the lower passage port 13 confronted with the upper part of the hole 5 of the member 3. As a result, the amt. of deposits to be sucked up is remarkably reduced, and the durability is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a filtration device that can efficiently pump up stored liquid and has improved durability.

[Conventional technology]

For example, in an electrical discharge machine, during drilling, a workpiece is cooled by sucking up and injecting liquid stored in a liquid storage tank.

Further, by repeatedly using the liquid storage tank, fine cutting powder generated from the workpiece gradually settles to the bottom of the liquid storage tank.

In addition, a pump is interposed in the pumping channel to pump up the stored liquid, and the pump is equipped with a pump as shown in Fig. 4 to prevent sediment from entering the pump when pumping up the stored liquid. A filter b is provided in a pumping pipe a located upstream of the bompul.

However, since the stored liquid G is used for circulation as described above, due to scattering, evaporation, etc., the liquid level of the stored liquid G stored in the liquid storage tank C, for example, which was initially 20 cm, may eventually rise to 5 cm. It may drop to On the other hand, cutting powder is precipitated at the bottom of the liquid storage tank C, and the thickness of the precipitate e is 2.
It can reach up to cm.

[Problem to be solved by the invention]

Therefore, if the suction port f of the pumping pipe a is arranged with the low liquid level as a reference, the sediment g and the suction port f will be close to each other, and the sediment e will be sucked together with the stored liquid g. As a result, the life of filter b is shortened.

Moreover, since the lower end of the pumping pipe a is directly inserted into the liquid storage tank C at the suction port f, its opening area is small, and the flow of the stored liquid g at the opening becomes faster, making it difficult to suck in the sediment e. It is on the verge of increasing.

The present invention is based on the fact that a filter member having a cylindrical shape and having a closed guide hole leading to a pumping pipe is attached to a bottom-opening cover body, so that the amount of sediment sucked up can be significantly reduced, and the durability can be improved. The purpose is to provide a filtration device that improves the

[Means to solve the problem]

In order to solve the above problems, the filtration device of the present invention is a filtration device that filters and sucks up the liquid stored inside the liquid storage tank through an opening in the upper part of the liquid storage tank, A channel gap is formed between a cover body which has a cylindrical body facing downward around the upper plate and is open at the bottom and passes through the opening, and a cylindrical body having a cylindrical body having a vertically communicating hole and an inner surface of the body. and a filter member that is housed in the cover body with the guide holes closed at the top and bottom, and a pumping pipe that is tubular in shape and has liquid passage ports at the top and bottom and passes through the openings. , the lower liquid passage port is installed so as to face above the guide hole of the filter member.

[Effect]

Since the cover body accommodates the filter member and has a cylindrical shape with an open bottom, the opening part has a large area and the stored liquid is sucked up from the opening part, so that the speed of the stored liquid passing through the opening part is increased. As a result of the low speed, the precipitate is not stirred and the suction of the precipitate is small, so that the filter member can maintain its filtration ability for a long period of time. Further, the filter member is attached to the filter member with a passage space between it and the inner surface of the body of the cover body, and the liquid passage port of the pumping pipe faces the closed conduit hole of the filter member. Therefore, the filter member can pass liquid almost evenly throughout the filter member,
As a result, the liquid passing rate becomes low and the filtration performance can be improved.

As described above, the present invention can improve filtration performance and durability, and can provide an economical filtration device.

〔Example〕

An embodiment of the present invention will be described below based on the drawings.

In FIGS. 1 to 3, the filtration device l of the present invention includes a bottom-open cover body 2 and a filter member 3 housed in the cover body 2.
A pumping pipe 6 is attached to a closed guide hole 5 provided in the filter member 3 to a filter base 4 consisting of a filter member 4.

Further, the cover body 2 can pass through the opening 9 at the top of the liquid storage tank 7, and in this embodiment, the vertical position can be adjusted via the pumping pipe 6 to a holding fitting 10 that is locked on the top surface of the opening 9. installed on.

The liquid storage tank 7 is a container body formed by covering the upper part of a box with a peripheral wall 22 raised from the periphery of the bottom plate 21 with a cover Mi23 having an opening 9. In this embodiment, the opening 9 has a flange on the periphery. It is formed as a circular hole with a circumference of 24.

The cover body 2 is constructed by lowering a straight cylindrical body part 2 made of a transparent material and whose interior can be seen through downwardly around the circular upper plate 11 passing through the opening 9. An open portion 16 is provided at the lower end. Further, a screw hole 25 is transparently provided in the center of the upper plate 11.

The filter member 3 is formed into a cylindrical shape by rolling filter paper, filter cloth, etc., for example, and is provided with a guide hole 5 extending in the axial direction at the center. Note that the outer diameter of the filter member 3 is formed to be smaller than the inner diameter of the body portion of the cover body 2.

Further, on the upper and lower end surfaces of the filter member 3, there are provided an upper seat plate 27 having a small diameter portion that fits into the guide hole 5 and a guide hole 26 in the center, and an upper seat plate 27 that is substantially the same as the core seat plate 27. The lower seat plates 29 are attached respectively.

The pumping pipe 6 is a thin-walled pipe body, and an upper threaded portion 31 is screwed into the outer peripheral surface near the upper end, and a lower threaded portion 32 is threaded near the lower end.

The lower threaded part 32 is screwed into the threaded hole 25 of the cover body 2 with the lower end of the pumping pipe 6 protruding, and is screwed into the threaded hole 25 of the cover body 2 and secured to the locking nut 33.
The cover body 2 and the pumping pipe 6 are connected to each other to prevent loosening.

The pumping pipe 6 is provided with a lower liquid passage port 13 located below the lower threaded portion 32 and penetrating the pipe wall.
A female threaded portion 36 is provided at the bottom by threading the inner wall.

An upper end portion of a threaded body 37 whose lower end extends toward the opening portion 16 near the opening leg is screwed into the female thread portion 36 .

Filter member 3 is on the upper seat W! , 27 can be screwed into the threaded portion 32 below the pumping pipe 6 to prevent the filter member 3 from moving upward, and the lower seat plate 29 can be screwed into the threaded body 37. This prevents the guide hole 5 from falling out, and the upper and lower portions of the guide hole 5 are closed by the upper and lower seat plates 27 and 29. Therefore, the guide hole 5 communicates with the inner hole 17 of the pumping pipe 6 via the lower liquid passage port 13.

The inner hole 17 is open at the upper end of the pumping pipe 6, and in this embodiment, the opening forms the upper liquid passage port 14.

Further, the filter member 3 is connected to the cover body 2 via the pumping pipe 6.
At the same time, inside the body 12, the inner surface 12 of the body 12 is removed.
A is accommodated with a flow path interval G between the two. In this way, the filter base 4 is formed by housing and fixing the filter member 3 inside the cover body 2.

The holding fitting 10 is a plate that covers the opening 9 of the liquid storage tank 7 from above and is removably locked to the liquid storage pa7 using a bolt or the like, and is screwed into the upper threaded part 31 in the center. It is provided with a screw hole 39 and two through holes 41, 42 on the sides.

The threaded portion 31 on the pumping pipe 6 is screwed into the threaded hole 39, and by screwing the pumping pipe 6 forward and backward with respect to the threaded hole 39, the holding fitting 10 holds the pumping pipe 6 in the vertical position. Can be installed adjustable.

In this embodiment, one end of the liquid feeding pipe C is connected to the upper liquid passage port 14 of the pumping pipe 6 on the outside of the pumping pipe 6, and the other end of the liquid feeding pipe C is connected to the upper liquid passage port 14 of the pumping pipe 6. Stretch.

In addition, a pump P for pumping up the liquid B stored in the liquid storage tank 7 is interposed in the liquid sending pipe C, and the return pipe from the pump P passes through one of the through holes 41 provided in the holding fitting 10 and its tip reaches the liquid storage tank 7. Extend inward.

Further, the drained liquid from the electric discharge machine M passes through the drain pipe E that passes through the other through hole 42 of the holding fitting 10, and is sent into the liquid storage tank 7. It settles at the bottom of the liquid storage tank 7.

In this way, the open part 16 of the filtration base 4 is formed wider than the liquid path of the pumping pipe 6, and the flow path interval G is interposed between the body inner surface 12A and the filter member 3. When sucking up the stored liquid with the pumping pipe 6,
In addition, the flow in the open part 16 is low speed, and even if the open part 16 is placed close to the precipitate A, the precipitate A is not sucked up. Adhesion can be significantly reduced and the service life of the filter member 3 can be significantly increased.

〔Effect of the invention〕

The filtration device of the present invention, like the one on the ridge, is based on the fact that a filter member is housed in a bottom-open cover body having a cylindrical body facing downward around an upper plate, with a flow path interval therebetween. Therefore, the area of the open part is larger than that of the pumping pipe, and by having a flow path interval, it is possible to significantly reduce the flow of stored liquid in the open part during pumping, and eliminate stirring and hoisting of sediment. I can do it. Therefore, the adhesion of precipitates to the filter member is drastically reduced, and the life of the filter member can be extended.

In addition, since the open part can be placed close to the sediment, even if the liquid level in the tank drops due to evaporation or scattering of the stored liquid, can be pumped up, increasing the efficiency of using stored liquid.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view showing an embodiment of the present invention together with an example of its use, Fig. 2 is a cross-sectional view showing its main parts, Fig. 3 is a plan view showing its holding fittings, and Fig. 4 is a diagram showing the prior art. FIG. 2-cover body, 3-filter member, 4-filtration base, 5-guiding hole, 6-pumping pipe, 7-liquid storage tank, 9
- opening, 10 - holding fitting, 11 - upper plate, i
2-Body portion, 13.14--Liquid passage port, B-Liquid storage, G--Flow path spacing.

Claims (1)

[Scope of Claims] 1. A filtration device for filtering and sucking up liquid stored in a liquid storage tank through an opening in the upper part of the liquid storage tank, which includes a cylindrical body facing downward around an upper plate. a cylindrical cover body having a bottom opening that passes through the opening, and a cylindrical shape having a guide hole that communicates with the upper and lower sides, and having a passage interval between the inner surface of the body and the upper and lower ends of the guide hole. A filtration base consisting of a filter member that is closed and housed in the cover body is provided with a pumping tube having a tubular shape having upper and lower liquid passage ports and passing through the opening, and a lower liquid passage port connected to the filter member. A filtration device that is installed facing above the conduit. 2. The filtration device according to claim 1, wherein the pumping pipe is equipped with a holding fitting that is locked on the upper surface of the opening. 3. The filtration device according to claim 1 or 2, wherein the holding fitting is attached to the pumping pipe so that its vertical position can be adjusted.