JP3519634B2 - Static electricity removal filter device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a static electricity removing filter device, and is useful when applied to a lubricating oil filter device for a gas turbine.

[0002]

2. Description of the Related Art Lubricating oil supplied to a bearing of a gas turbine or the like causes seizure of the bearing when dust is mixed in the lubricating oil. Therefore, it is necessary to remove the dust by filtering with a filter device. .

However, in this lubricating oil filter device, static electricity is generated by the frictional force when the lubricating oil passes through the filter element, and the lubricating oil and the filter element are electrically charged. Therefore, if it is left as it is, static electricity may spark (spark discharge), which may cause an abnormal noise such as pompon in the filter casing, erosion of the spark portion, or deterioration of oil.

Therefore, conventionally, a ground rod or the like is installed in the flow path of the lubricating oil flowing in the filter casing, and the static electricity generated in the lubricating oil is removed by the ground rod or the like as much as possible.

[0005]

However, in particular, in a lubricating oil filter device of a lubricating oil system for a gas turbine, in order to improve the filtering performance of the lubricating oil and obtain a lubricating oil of higher purity, a coarse mesh is used. In place of the filter element made of paper, a filter element made of fine paper filter paper is adopted. That is, a paper filter element having a size of 5 to 10 μm according to the API standard is adopted.

Since such a paper filter element has a fine mesh and therefore has a large frictional resistance to the lubricating oil, a large frictional force is generated when the lubricating oil passes, and not only the lubricating oil but also the paper filter element. Also, a lot of static electricity is generated. For this reason, if the paper filter element and the filter casing are electrically insulated by a gasket or the like, a large amount of static electricity accumulates in the paper filter element, and this static electricity acts on the metal fitting part of the paper filter element and the holding metal fitting. Sparks in between.

Therefore, the number of paper filter paper elements installed in the filter casing is increased to increase the flow rate of lubricating oil per paper filter paper element (ie, the flow rate of lubricating oil).
It has been necessary to reduce the frictional force when the lubricating oil passes through the paper filter paper elements by reducing the above, and to reduce the amount of static electricity generated in each paper filter paper element.

However, if the number of paper filter paper elements is increased, the apparatus becomes larger and the cost becomes higher. In other words, in order to downsize the device and reduce the cost, it is necessary to suppress the increase of paper filter paper elements as much as possible, but if the number of paper filter paper elements is reduced, the lubricating oil per paper filter paper element is as much as that. As the flow rate increases, the amount of static electricity generated in each paper filter paper element also increases, and static electricity may also be sparked in the paper filter paper element.

Therefore, in view of the above-mentioned prior art, the present invention has a structure which surely removes not only static electricity generated in the fluid to be filtered (lubricating oil etc.) but also static electricity generated in the filter element (paper filter paper element etc.). Accordingly, it is an object of the present invention to provide a static electricity removing filter device capable of reducing the number of filter elements to reduce the size and cost of the filter device.

[0010]

[0011]

According to a first aspect for solving the above problems
The static electricity removing filter device of the invention has a fluid inlet to be filtered.
The provided primary side chamber and the secondary side chamber provided with the filtered fluid outlet
Provided in the primary side chamber with the filter casing having
Guided pipe and guided by this guide pipe
It is installed so as to surround the guide pipe, and it has continuity
It is a product and is connected to the filter casing.
The filter element and the guide pipe
And the tip side projects into the secondary side chamber, and
In the static electricity removal filter device having a grounding rod conducted to the luter casing, the filter element is formed of a conductive porous plate on the outer peripheral surface and the inner peripheral surface of a cylindrical paper filter paper. An outer cylinder and an inner cylinder are provided, and conductive end plates are attached to both axial ends of the outer cylinder and the inner cylinder.

Further , the static electricity removing filter device of the second invention is
The primary side chamber with the filtered fluid inlet and the filtered fluid outlet
Filter casing having a secondary chamber with a mouth
And a guide pipe provided in the primary chamber,
Guided by the guide pipe so that it surrounds the guide pipe
It is attached and is a conductive product, and the fill
The filter element connected to the
Inserted in the guide pipe, the tip side is the secondary side chamber
Projecting to and connecting to the filter casing
Odor filter device with a grounding rod
The filter element is an element with a grounding claw.
Through the presser foot of the filter casing
It is characterized in that it is electrically connected to the lid. Further, static electricity-removing filter device of the third invention, in the first shot bright static removal filter apparatus, characterized in that said filter element being electrically connected to the casing cover of the filter casing through the element retainer a grounded nail And

A static electricity removing filter device according to a fourth aspect of the present invention is the static electricity eliminating filter device according to the second or third aspect of the present invention, wherein a conductive spring is provided between the element retainer and the casing lid. To do.

[0014]

[0015]

[0016]

[0017]

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[First Embodiment] FIG. 1 is a sectional view of a static electricity removing filter device according to a first embodiment of the present invention, FIG. 2 is a sectional view showing a part of FIG. 1 in an enlarged manner, and FIG. Is an enlarged side view showing the structure of the filter element provided in the static electricity removing filter device partially broken away, and FIG. 3B is a view taken along the line C-C of FIG. 3A. 4A is a cross-sectional view of the element retainer provided in the filter element, FIG. 4B is a bottom view of the element retainer, and FIG.
6 (c) is an enlarged side view of the grounding claw provided on the element retainer, FIG. 5 (a) is a sectional view of an intermediate ring provided on the filter element, FIG. 5 (b) is a plan view of the intermediate ring, and FIG. FIG. 6A is an enlarged view of part A of FIG. 2, and FIG. 6B is an enlarged view of part B of FIG.

<Structure> As shown in FIG. 1, the static electricity removing filter device 1 of the first embodiment is provided with a plurality of filter elements 3 made of paper filter paper in a filter casing 2. It should be noted that FIG. 1 shows three filter elements 3, and the left and right filter elements 2 represent cross sections.

The filter casing 2 has a cylindrical body 4
The upper and lower ends of the body portion 4 are closed by an upper casing lid 5 and a lower casing lid 6. The lower casing lid 6 is welded to the body portion 4 and fixed to the installation base plate 13 by bolts 12. The upper casing lid 5 is attached to the flange portion 7 provided on the outer peripheral surface of the upper end portion of the body portion 4 with bolts 8 and is detachable. A screw shaft 9 is attached to the upper surface of the upper casing lid 5, and the screw shaft 9 is screwed with a handle 10 supported by a support member 11. Therefore, the upper casing lid 5 can be lifted up by turning the handle 10 with the bolt 8 removed.

A casing bottom plate 14 is welded to the lower portion of the body portion 4. A partition plate 15 is welded to an intermediate portion of the body portion 4, and the partition plate 15 vertically partitions the interior of the filter casing 2 into a primary side chamber 16 and a secondary side chamber 17. The primary chamber 16 is provided with a lubricating oil inlet 18, and the secondary chamber 17 is provided with a lubricating oil outlet 19. A manhole 54 for inspection is also provided in the secondary chamber 17.

A plurality of filter elements 3 are provided in the primary side chamber 16. The number of filter elements 3 is determined by the total flow rate of the lubricating oil required and the flow rate of the lubricating oil that can be flowed per filter element without generating static sparks. According to the result of the experiment, the present inventor set the flow rate of the lubricating oil that can be flowed per one filter element to about 220 s / min. The flow rate of lubricating oil that can flow per filter element depends on conditions such as the type (characteristic) of lubricating oil.

A baffle plate 20 fixed to the inner surface of the body portion 4 is provided near the entrance 18 in the primary side chamber 16. The jammer plate 20 is T-shaped in plan view,
Lubricating oil flowing from the inlet 18 into the primary side chamber 16 is dispersed throughout the primary side chamber 16 so that each filter element 3
It is provided to allow the lubricating oil to flow evenly.

As shown in FIG. 2, the filter element 3 has a two-stage structure including an upper element 21 and a lower element 22. An intermediate ring 31 is provided between the upper element 21 and the lower element 22. Both the upper element 21 and the lower element 22 have a structure as shown in FIG.

That is, it has a cylindrical paper filter paper 23 having a size of 5 to 10 μm, and an outer cylinder 24 and an inner cylinder 25 are provided on the outer peripheral surface and the inner peripheral surface of the paper filter paper 23, respectively. Both the outer cylinder 24 and the inner cylinder 25 are made of a perforated plate having a large number of holes 24a, 25a on the entire surface. A ring-shaped upper end plate 26 and a lower end plate 27, which are element protection frames, are attached and fixed to both axial ends of the outer cylinder 24 and the inner cylinder 25 so as to straddle the outer cylinder 24 and the inner cylinder 25. Has been done.

The inner and outer cylinders 24, 25, the upper and lower end plates 26, 27, etc. are made of steel (conductive), and the inner and outer cylinders 24, 25 and the upper and lower end plates 26,
It is electrically connected to 27. That is, both the upper element 21 and the lower element 22 are electrically connected over the entire length and are completely electrically conductive products. Further, as will be described later in detail, the upper element 21 and the lower element 2
2 is electrically connected by an intermediate ring 31 with a grounding claw, and the entire filter element 3 is also electrically connected.

In FIG. 3, 28 is a clip provided inside the upper end plate 26, 29 is an element reinforcing ring provided inside the inner cylinder 25, and 30 is attached to the upper and lower end plates 26, 27. It is a ring-shaped gasket.

Further, as shown in FIG. 2, in the primary side chamber 16, a plurality of guide pipes 41 are erected on the partition plate 15 (see FIG. 1). A large number of holes 41a are formed in the side surface of the guide pipe 41. The lower end of the guide pipe 41 is fitted into the hole 15a of the partition plate 15 and welded to the peripheral edge of the hole 15a. The filter element 3 is guided by the guide pipe 41 and is guided by the guide pipe 4.
It is attached so as to surround 1.

The lower end side of the filter element 3 is supported by a steel element receiver 42 via a gasket 30. The element receiver 42 is welded to the outer peripheral surface of the lower portion of the guide pipe 41. On the other hand, the upper end side of the filter element 3 is
It is held by a steel element holder 43.

A spring 44 is provided between the element retainer 43 and the upper casing lid 5. The spring 44 is adapted to be compressed by the upper casing lid 5 when the upper casing lid 5 closes the filter casing 2. The spring force at this time urges the filter element 3 downward. There is.

In other words, the spring force of the spring 44 causes the element retainer 43 and the element receiver 42 to press the upper element 21 and the lower element 22 from above and below, whereby the upper element 21 and the lower element 22 are pressed. 22 and 22 are pressure-bonded to each other via an intermediate ring 31 so as to be stable without moving relative to each other. Moreover, the spring 44 is made of steel and connects the element retainer 43 and the upper casing lid 5 to each other.

As shown in FIGS. 4 (a) and 4 (b), a steel grounding claw 45 is provided on the peripheral portion of the lower surface of the element retainer 43.
Is provided. As shown in FIG. 4C, the ground claw 45 has a dogleg shape, one end of which is welded to the lower surface of the element retainer 43 and the other end of which is lifted from the lower surface.

Therefore, as shown in FIG. 6 (a), the ground claw 45 bypasses the gasket 30 and electrically connects the element retainer 43 and the upper end plate 26 of the upper element 21. Moreover, at this time, the earth claw 45 is bent, and the element pressing member 43 and the upper end plate 26 are surely brought into conduction by the spring force generated by this bending.

Further, as shown in FIGS. 5 (a) and 5 (b),
Earthing claws 45 are also provided on the peripheral portions of the upper and lower surfaces of the intermediate ring 31. Therefore, as shown in FIG. 6B, the upper ground claw 45 bypasses the gasket 30,
The intermediate ring 31 and the lower end plate 27 of the upper element 21 are electrically connected to each other, and the lower ground claw 45 is provided.
However, bypassing the gasket 30, the intermediate ring 31
And the upper end plate 26 of the lower element 22 are electrically connected. Moreover, the continuity of these is also ensured by the earth claw 4
This is reliably performed by the spring force generated by the bending of No. 5.

As described above, the upper element 21 and the lower element 22 are electrically connected to each other by the intermediate ring 31 having the ground claw. That is, the filter element 3 is electrically connected over the entire length. Moreover, this filter element 3 is provided with an element retainer 4 with a grounding claw.
3 and the spring 44, the upper casing lid 5
(That is, the filter casing 2).

On the other hand, as shown in FIG.
A steel ground rod 51 is inserted through the wire 1. The base end side (upper end side) of the ground rod 51 is fixed to one end side of the guide pipe 41 so as to be located at the axial center of the guide pipe 41, and the tip end side (lower end side) thereof projects into the secondary chamber 17.
In addition, it is arranged so as to have a slight gap d between it and the casing bottom plate 14, which is the end face of the secondary side chamber 17. The upper end of the earth rod 51 is welded to the plate 52, and the plate 52 is welded to the upper end of the guide pipe 41.

Further, a steel ground rod reinforcing rib 55 is welded to the ground rod 51, and this reinforcing rib 55 is welded to the partition plate 15. That is, the ground rod 51 is firmly fixed to the partition plate 15 and electrically connected to the partition plate (that is, the filter casing 2) via the reinforcing rib 55. Since the plate 52 and the guide pipe 41 are also made of steel, the ground rod 51 is electrically connected to the filter casing 2 through these members. Also,
By firmly fixing the earth rod 51 by the reinforcing rib 55 and sufficiently increasing the diameter of the earth rod 51, the earth rod 51 is prevented from being broken and flowing out together with the lubricating oil.

As shown in FIG. 7, a large number of protrusions 51a may be provided on the outer peripheral surface of the ground rod 51. These protrusions 51a extend radially from the center of the ground rod 51 and are provided over the entire axial direction of the ground rod 51. Further, as shown in FIG. 8, the ground rod 51 may be a pointed tip. Further, as shown in FIG. 9, the lower end portion of the ground rod 51 may be fixed to the casing bottom plate 14 via an insulating material 53 such as ceramics.

<Operation / Effect> In the static electricity removing filter device 1 having the above configuration, the lubricating oil flowing from the inlet 18 into the primary side chamber 16 is diffused by the jammer plate 20 into the entire secondary side chamber 16, and then, in FIG. As indicated by the arrow (solid line)
Dust is removed (filtered) through the filter element 13.

At this time, static electricity is generated between the lubricating oil and the filter element 3 due to the frictional force between the lubricating oil and the filter element 3 (paper filter paper 23). Moreover, the paper filter paper 23 of the filter element 3 has a much finer mesh than a wire mesh filter element or the like, and the frictional force when the lubricating oil passes through is large, so that a large amount of static electricity is generated between the lubricating oil and the filter element 3. Occurs.

Therefore, if the filter element 3 and the element presser 43 are insulated by the gasket 30, static electricity may be sparked between the upper end of the filter element 3 and the element presser 43. However, the filter element 3 according to the first embodiment is a conductive product, and the upper casing lid 5 is provided via the element retainer 43 with the earth claw 45 and the spring 44.
Since it is conducted to the filter casing 2 (that is, the filter casing 2), static electricity generated in the filter element 3 is transferred to the filter casing 2 as indicated by an arrow (dotted line) in FIG.
Can be surely flushed. Therefore, the static electricity is dispersed in the filter casing 2, and further the installation base plate 13
Since it is not dispersed in the filter element 3 and accumulated in the filter element 3, it is possible to prevent the occurrence of sparks in the filter element 3.

On the other hand, the lubricating oil charged by passing through the paper filter paper 23 of the filter element 13 then flows into the guide pipe 41 as shown by the arrow (solid line) in FIG. Flow downward to the secondary side chamber 1
7 and out of the filter device through the outlet 19.

At this time, the static electricity of the lubricating oil is collected in the inner cylinder 25 of the filter element 3 to some extent, flows through the element retainer 43 and the spring 44 to the upper casing lid 5, and the earth rod 51 in the guide pipe 41. 2 and the ground rod 51 in the secondary chamber 17 as well, and as shown by the arrow (dotted line) in FIG. 2, the partition is provided via the reinforcing rib 55 or the guide pipe 41. It flows to the plate 15 (ie the filter casing 2). The static electricity of the lubricating oil is better collected when the flow velocity of the lubricating oil is slower. Therefore, since the flow velocity of the lubricating oil is slower in the secondary side chamber 17 than in the guide pipe 41, more static electricity is collected in the secondary side chamber 17.

As described above, the static electricity of the lubricating oil is not dispersed in the filter casing 2 and the installation base plate 13 and accumulated in the lubricating oil, so that the spark of the lubricating oil can be prevented.

As described above, since not only the static electricity of the lubricating oil but also the static electricity of the filter element 3 can be surely removed, the flow rate of the lubricating oil per filter element can be increased. For this reason,
The number of filter elements 3 can be reduced to reduce the size and cost of the filter device 1.

Further, the filter element 3 is provided with an outer cylinder 24 and an inner cylinder 25 made of a conductive porous plate on the outer peripheral surface and the inner peripheral surface of a cylindrical paper filter paper 23.
4 and the inner cylinder 25 have conductive end plates 2 at both axial ends.
Because of the configuration in which 6, 27 are attached, it is possible to surely conduct electricity over the entire length in the axial direction, and it is possible to reliably collect static electricity generated in the paper filter paper 23 by the outer cylinder 24 and the inner cylinder 25.

Further, by using the element retainer 43 provided with the grounding claw 45, the grounding claw 45 can surely bring the filter element 3 and the filter casing 2 into conduction. Furthermore, the element presser 4
Since the filter element 3 and the filter element 3 are in contact with each other by a grounding claw 45 so as to be separable from each other, when the filter element 3 is replaced or maintained, the element holder 43
Can be easily removed from the filter element 3.

Further, since the conductive spring 44 is provided between the element retainer 43 and the upper casing lid 5, the fixing of the filter element 3 and the conduction of the filter casing 2 are simultaneously performed by this spring 44. It can be carried out.

Further, the ground rod 51 has its base end side fixed to one end side of the guide pipe 41 and positioned at the axial center of the guide pipe 41 (that is, positioned at the center of the lubricating oil jet), and its tip end side is secondary. Since the side chamber 17 is provided with a slight gap between the casing bottom plate 14 and the side chamber 17, it is possible to reliably collect the static electricity of the lubricating oil without sparking. Moreover, since the base end side of the ground rod 51 is fixed to one end side of the guide pipe 41, for example, the ground rod is erected on the bottom of the secondary chamber and the ground rod is erected on the bottom of the primary chamber. It is easier to position the ground rod 51 at the axial center of the guide pipe 41 as compared with the configuration in which it is inserted into the guide pipe.

In addition, the tip of the earth rod 51 is made of an insulating material 53.
When it is fixed to the casing bottom plate 14 via, it is possible to more reliably fix the ground rod 51, so that it is possible to more reliably prevent the ground rod 51 from breaking and flowing out together with the lubricating oil.

When a large number of protrusions 51a are provided on the outer peripheral surface of the earth rod 51, the current collecting ability of the earth rod 51 is further improved.

The structure relating to the ground rod 51 is shown in FIG.
~ It was determined based on the experiment as shown in FIG.

As shown in FIG. 10, when the brush-shaped electrode 61 is arranged on the casing bottom plate 14 so as to traverse the jet of the lubricating oil, a corona discharge 62 that shines white and white is generated in the portion of the brush-shaped electrode 61 where the jet flows. It was observed to remove the static electricity of the lubricating oil without sparking.

As shown in FIG. 11, when the electrode 63 was arranged on the side of the jet of lubricating oil, a sharp spark was generated between the electrode 63 and the center of the jet.

When the tip of the earth rod 51 was positioned in the middle of the secondary chamber 16 as shown in FIG. 12, a spark was generated below the tip.

When the tip of the earth rod 51 is located near the casing bottom plate 14 as shown in FIG. 13, no spark occurs. It should be noted that the static electricity of the lubricating oil could be removed better when the slight gap was held between the tip and the casing bottom plate 14 than when the tip was brought into contact with the casing bottom plate 14.

Although not shown, it is observed that when the protrusion 51a is provided on the outer peripheral surface of the earth rod 51, the protrusion shines pale due to corona discharge, and the static electricity of the lubricating oil is well removed without sparking. Was done.

From the above, it is considered that the ground rod in consideration of the following three points is effective, and the ground rod 51 having the above-mentioned structure is provided. The earth rod should be located at the axis of the guide pipe so that it is located at the center of the lubricating oil jet. The tip of the ground rod should be as close as possible to the casing bottom plate of the secondary chamber. It is better to provide as many protrusions as possible on the outer peripheral surface of the ground rod.

[Second Embodiment] In the static electricity removing filter device according to the second embodiment of the present invention, when the brush electrode 61 is placed on the bottom of the secondary chamber 16 as described above (see FIG. 10), it is pale. It is configured by focusing on the fact that the spark was desired to be generated only when the corona discharge 62 was seen. FIG. 14 shows a sectional view of the static electricity removing filter device according to the second embodiment of the present invention.

<Structure> As shown in FIG. 14, the static electricity removing filter device 101 of the second embodiment is replaced with the earth rod 51 in the static electricity eliminating filter device 1 (see FIG. 1) of the first embodiment. The grid-shaped earth body 102 is arranged in the secondary side chamber 17.

The ground member 102 has a lower end fixed to the casing bottom plate 14 and an upper end made of steel.
It is fixed to. The support member 103 is welded to the partition plate 15. That is, the earth body 102 is electrically connected to the filter casing 2 via the casing bottom plate 14, and also electrically connected to the filter casing 2 via the support member 103 and the partition plate 15. Since the grounding body 102 has a lattice shape, the lubricating oil passage in the secondary chamber 17 is not narrowed.

The rest of the configuration of the static electricity removal filter device 101 is the same as that of the static electricity elimination filter device 1 of the first embodiment, and therefore the description thereof is omitted here.

<Operation / Effect> According to the static electricity removing filter device 101 having the above configuration, the static electricity generated in the lubricating oil is collected by the earth body 102 provided in the secondary side chamber 16 without sparking, It can be flushed into the filter casing 2.

Further, the installation of the earth member 102 in the secondary chamber 17 is easier and more flexible than the installation of the earth rod 51 as described above.

In the second embodiment, the grid-like grounding body 102 is provided in the secondary side chamber 17, but the secondary side chamber 17 is not provided.
The shape of the grounding body provided inside is not limited to the lattice shape, and as long as the lubricating oil flow passage in the secondary side chamber 17 is not narrowed, a flat plate, a curved plate or the like provided with a large number of branches, Various shapes are possible.

The static electricity removing filter device of the present invention is suitable for a lubricating oil filter device of a lubricating oil system for a gas turbine, but is not necessarily limited to this, and a lubricating oil filter device for a steam turbine, various engines, etc. It is also applicable to. Further, the present invention can be applied not only to the lubricating oil but also to a filter device for other oils such as hydraulic oil, and is not limited to a filter device for oils, but to a filter device for other fluids to be filtered (liquid or gas). Is also widely applicable.

The static electricity removing filter device of the present invention is not necessarily limited to the filter device using the filter element 3 made of paper filter paper as in the first and second embodiments, but a wire mesh filter. It can be applied to a filter device using an element, and is also widely applicable to a filter device using other filter elements such as a ceramic filter element.

Further, although the filter element 3 (lower element 22) and the element receiver 42 are insulated by the gasket 30 in the above-described first and second embodiments, the filter element 3 is also provided with the earth claw. The static electricity may also flow from the lower side of the filter element 3 to the filter casing 2 via the element receiver 42 and the guide pipe 41.

Further, although the filter element 3 has a two-stage configuration in the first and second embodiments, the present invention is not limited to this, and the filter element 3 may have a one-stage configuration, or may have three or more stages. Good.

Further, the static electricity removing filter devices 1 and 101 of the first and second embodiments can prevent the generation of sparks in the filter device. However, when a larger amount of static electricity is generated, etc. Alternatively, an earth terminal may be provided at the bottom of the filter casing 2, and this earth terminal may be connected to an earth facility installed in a plant system in which the static electricity removing filter devices 1 and 101 are installed.

Further, although the static electricity removing filter devices 1 and 101 of the above-mentioned first and second embodiments are vertical type, the static electricity eliminating filter device of the present invention is not necessarily limited to this, and the static electricity eliminating filter device is not limited to this. Device 1, 10
It may be a horizontal type in which the primary side chamber 16 and the secondary side chamber 17 are located on the left and right with 1 being the side. Further, even in the case of the vertical type, the structure in which the earth rod 51 is projected upward, that is, the primary side chamber 16 is located on the lower side and the secondary side chamber 17 is located on the upper side, and the lubricating oil is It may be configured to flow from the top to the top. However, in this case, since the filter element 3 must be pulled out when the filter element 3 is replaced or maintained, it is necessary to secure a space therefor under the filter device. On the other hand, in the case of the configurations of the first and second embodiments, since the filter element 3 is pulled out upward, the space above the filter device can be effectively utilized. Therefore, in view of the above, the static electricity removing filter device has a vertical structure in which the primary side chamber 16 is located on the upper side and the secondary side chamber 17 is located on the lower side as in the first and second embodiments. desirable.

[0073]

[0074]

[0075]

[0076]

As described above, the embodiment of the invention will be specifically described.
As described above, the static electricity removing filter device according to the first aspect of the present invention includes a primary side chamber provided with a filtered fluid inlet and a filtered fluid outlet.
A filter casing having a secondary side chamber provided with
The guide pipe provided in the primary chamber and the guide
Installed so that the guide pipe surrounds the guide pipe
It is a conductive product and is the filter
The filter element connected to the casing and the
It is inserted into the id pipe and the tip side projects into the secondary chamber.
And the filter casing that is electrically connected to the filter casing.
In a static electricity removing filter device having a base rod ,
The filter element is provided with an outer cylinder and an inner cylinder made of a conductive porous plate on the outer peripheral surface and the inner peripheral surface of a cylindrical paper filter paper, and the outer cylinder and the inner cylinder are electrically conductive at both axial ends. It is characterized by being equipped with an end plate.

Therefore, according to the static electricity removing filter device of the first invention, the filter element is surely conducted over the entire length in the axial direction, and the static electricity generated in the paper filter paper is surely collected by the outer cylinder and the inner cylinder. Can be powered.

Further , the static electricity removing filter device of the second invention is
The primary side chamber with the filtered fluid inlet and the filtered fluid outlet
Filter casing having a secondary chamber with a mouth
And a guide pipe provided in the primary chamber,
Guided by the guide pipe so that it surrounds the guide pipe
It is attached and is a conductive product, and the fill
The filter element connected to the
Inserted in the guide pipe, the tip side is the secondary side chamber
Projecting to and connecting to the filter casing
Odor filter device with a grounding rod
The filter element is an element with a grounding claw.
Through the presser foot of the filter casing
It is characterized in that it is electrically connected to the lid. Further, static electricity-removing filter device of the third invention, in the first shot bright static removal filter apparatus, characterized in that said filter element being electrically connected to the casing cover of the filter casing through the element retainer a grounded nail And

Therefore, according to the static electricity removing filter device of the second or third invention, the filter element and the filter casing can be surely brought into conduction by the grounding claw. Further, since the element retainer and the filter element are in contact with each other by the earth claw so as to be separable from each other, the element retainer can be easily removed from the filter element when the filter element is replaced or maintained.

Further, the static electricity removing filter device of the fourth invention is the static electricity eliminating filter device of the second or third invention, wherein a conductive spring is interposed between the element retainer and the casing lid. To do.

Therefore, according to the static electricity removing filter device of the fourth aspect of the present invention, the fixing of the filter element and the conduction of the filter casing with the spring can be performed at the same time.

[0082]

[0083]

[0084]

[0085]

[0086]

[0087]

[0088]

[0089]

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a static electricity removal filter device according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a part of FIG. 1 in an enlarged manner.

FIG. 3 (a) is an enlarged side view showing a partially broken structure of a filter element provided in the static electricity removing filter device, and FIG. 3 (b) is a view taken along the line C-C of FIG. 3 (a). .

4A is a cross-sectional view of an element presser provided in the filter element, FIG. 4B is a bottom view of the element presser, and FIG. 4C is an enlarged side view of a ground pawl provided in the element presser.

5A is a sectional view of an intermediate ring provided in the filter element, and FIG. 5B is a plan view of the intermediate ring.

6A is an enlarged view of a portion A in FIG. 2, and FIG. 6B is a portion B in FIG.
FIG.

FIG. 7 is a side view showing another configuration of the ground rod.

FIG. 8 is a side view showing another configuration of the ground rod.

FIG. 9 is a cross-sectional view showing another fixing structure of the ground rod.

FIG. 10 is an explanatory diagram of an experiment on a ground rod.

FIG. 11 is an explanatory diagram of an experiment on a ground rod.

FIG. 12 is an explanatory diagram of an experiment on a ground rod.

FIG. 13 is an explanatory diagram of an experiment on a ground rod.

FIG. 14 is a sectional view of a static electricity removing filter device according to a second embodiment of the present invention.

[Explanation of symbols]

1,101 Static eliminator filter device 2 Filter casing 3 filter elements 4 torso 5 Upper casing lid 6 Lower casing lid 7 Flange 8,12 volt 9 screw shaft 10 handles 11 Support member 13 Installation base plate 14 Casing bottom plate 15 partition boards 15a hole 16 Primary side room 17 Secondary chamber 18 Lubricating oil inlet 19 Lubricating oil outlet 20 Jama Board 21 Upper element 22 Lower element 23 Paper filter paper 24 outer cylinder 24a hole 25 inner cylinder 25a hole 26 Upper end plate 27 Lower end plate 28 clips 29 Element reinforcement ring 30 gasket 31 Intermediate ring 41 Guide pipe 41a hole 42 Element receiver 43 Element presser 44 spring 45 Earth Claw 51 Earth Stick 52 plates 53 insulation 54 Inspection manhole 55 Reinforcing rib 102 Earth body 103 support member

Continuation of front page (51) Int.Cl. ⁷ identification code FI B01D 29/10 530B 29/24 C (56) Reference JP-A-7-308533 (JP, A) JP-A-6-129595 (JP, A) ) (58) Fields surveyed (Int.Cl. ⁷ , DB name) B01D 35/00-35/34 B01D 29/11 B01D 29/50 F01D 25/18 F02C 7/06

Claims (4)

(57) [Claims] 1. A primary side chamber provided with an inlet for a fluid to be filtered and a filtered material.
A filter case having a secondary chamber provided with an excess fluid outlet
Thing, a guide pipe provided in the primary chamber, and a guide pipe surrounding the guide pipe.
It is attached to the
Filter element connected to the filter casing
And is inserted into the guide pipe, and the tip side is the secondary side chamber.
Protruding into the inside and conducting to the filter casing.
In a static electricity removing filter device having a grounded earth rod , the filter element is provided with an outer cylinder and an inner cylinder made of a conductive porous plate on an outer peripheral surface and an inner peripheral surface of a cylindrical paper filter paper. A static electricity removing filter device characterized in that conductive end plates are attached to both axial ends of the outer cylinder and the inner cylinder. 2. A primary side chamber provided with an inlet of a fluid to be filtered and a filtered material.
A filter case having a secondary chamber provided with an excess fluid outlet
Thing, A guide pipe provided in the primary chamber, I'll be guided by this guide pipe and surround it
It is attached to the
Filter element connected to the filter casing
When, Inserted in the guide pipe, the tip side is the secondary side chamber
Protruding into the inside and conducting to the filter casing.
In a static electricity removal filter device with a grounded rod
And The filter element is an element with a ground claw
Casing lid of the filter casing through the presser foot
Static electricity removal filter characterized by being electrically connected to
-Device. 3. The static electricity removing filter device according to claim 1 , wherein the filter element is electrically connected to a casing lid of the filter casing through an element retainer having a grounding claw. . 4. The static electricity removing filter device according to claim 2 or 3, wherein a conductive spring is provided between the element retainer and the casing lid.