JPH07136412A - Device for filtering continuously flowing fluid or gaseous media - Google Patents

Abstract

(57) [Abstract] [Purpose] To easily and surely open the pipe section during strong pollution and the resulting high pressure rise in the area of the filter member. A filter member (4) having a plurality of filter segments (11) arranged in a casing (5) held by a central shaft (17) is provided in a tubular section (1) of circular cross section, the filter segments having substantially the same configuration and the center of the filter segment Filtering device for fluid or gaseous media, which can be backwashed by a backwash device 25 rotatably fixed to the shaft. Casing 5
Has a plurality of casing parts 6 and 7 arranged in front and rear in the axial direction of the pipe part, and one casing part is arranged in the pipe part so as to be rotatable around the central axis, and both casing parts are
It has a plurality of filter segments 11 and at least one penetrating segment each having an opening for passing the medium, and the medium can freely pass through the opening of the penetrating segment by relatively rotating the casing part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention fits a filter member in a tube portion having a circular cross section,
A plurality of filter segments arranged in a casing held on the central axis, the filter segments being of substantially identical construction and preferably being rotatably fixed to the central axis of the filter segment. A device for filtering a continuously flowing fluid or gaseous medium of the type which can be backwashed by a washing device.

[0002]

Devices of this kind are known from the prior art. For example, devices are known for removing solid components from a continuous stream of flowing or gaseous medium, which device has a filter element fitted in the tube section.

Such a filter element is constructed as a casing in which 8 to 12 filter segments are arranged, depending on the tube diameter, although the use of the filter mechanism is generally not limited by a certain number of filter segments. To be done. The filter segments are substantially identical, that is to say that they are configured in a substantially trapezoidal shape in radial cross section and each has one filter plate, which filter plate has a shape along a frustoconical periphery. so,
It is arranged between two lamellas of the pipe section extending in the flow direction.

The casing is constructed as a tube and has a central axis on which the backwash device is rotatably fixed. The backwash device consists of a backwash rotor with a continuous annular suction shoe, the opening surface of the suction shoe matching the opening cross section of the filter segment.

The suction shoe reaches a position on its circumferential surface which is aligned with the opening of the filter segment during the backwash time interval, the suction shoe in each case being located directly opposite the relevant filter segment. In addition, the backwash device is connected to the backwash rotor and has an effective negative pressure backwash conduit in the suction shoe,
Therefore, the solid components collected in the filter plate are sucked in each time.

Such a known device has been chosen in particular as a filter for cooling water, which filter is fitted in the cooling water circuit of a power plant, in particular a nuclear power plant. This device is connected, for example, in front of the condenser in the cooling water circuit of the power plant.

However, it should be noted that the device of the invention described below is not limited to the use of a filter device with a backwash device. Instead of the backwash device, another device can be provided for cleaning the filter surface continuously or at predetermined time intervals.

The problem with the known filter device is that cooling water can be fed to a subsequent device, for example a condenser, if the filter surface or the filter segment is shocked by sudden accumulation of solids on the filter surface. It is to stop supply.

Due to this, damage to the condenser is unavoidable. In the device known in the prior art for removing solids from a continuous stream of fluid or gaseous medium, such an overload of the filter segment and the associated cooling water supply of the subsequent condenser are required. Interruption
It is avoided that a plurality of filter segments, for example 4 to 6 or 8 to 12 filter segments, are designed as so-called bypass segments.

The position of the bypass-segments within the retainers arranged on these segments is fixed by shear pins. When a sudden pressure rise occurs in the region of the bypass-segment, the shear pin is sheared, so that the filter plate with the bypass-segment added is pushed out of its retainer, releasing one opening, which is cooled. Allow unimpeded flow of water. It is also possible to return the filter plate to its ready position and fit a new shear pin after cleaning the filter plate of the bypass-segment, which is disengaged from the holding part.

Due to the difference in performance of the shear pins, controlled opening of the bypass-segments can be achieved with economical construction only at a given pressure.

[0012]

SUMMARY OF THE INVENTION The object of the invention is to make possible the opening of the tube section in a simple and reliable manner in the event of a significant contamination and the resulting high pressure rise in the area of the filter element, and in a simple manner. The object of the invention is to provide a device for filtering continuously flowing fluid or gaseous media of the type mentioned at the outset, which has a reliable construction.

[0013]

SUMMARY OF THE INVENTION In a configuration of the invention devised to solve the above-mentioned problems, the casing has at least two casing parts arranged one behind the other in the axial direction of the pipe part, At least one of the casing parts is arranged rotatably in the tube part about a central axis, and both casing parts are
A plurality of filter segments and at least one respective penetrating segment with an opening for the free passage of the medium, the opening of the penetrating segment allowing the casing parts to pivot relative to one another. Allows the medium to flow freely.

As a result, the filter device according to the invention is
It consists of a casing which is divided into two casing parts in the radial tube plane, the casing parts being arranged axially behind one another and directly connected to one another. At least one of the two casing parts is arranged pivotably about the central axis in the tube part between two angular positions.

In the first position, the penetrating segment of the first casing part is covered by the filter segment of the second casing part, and the penetrating segment of the second casing part is the filter segment of the first casing part. Being covered by provides the desired continuous filtration of the flowing medium.

Therefore, at this position, the entire surface of the filter member, which is arranged in the medium flow direction, is configured as a filter surface. In case the filter segment is blocked by the solid component and thereby interrupts the cooling water supply to the subsequent device part, the casing part pivotally held in the pipe part is The penetrating segment of the casing portion is pivoted to match the penetrating segment of the second casing portion.

In this way, unimpeded flow of the medium in the above-mentioned case of cooling water is possible by means of the mutually matching openings of both penetration segments, so that a minimum amount of cooling water is applied to the subsequent device parts. Reach

According to the invention, each at least one penetrating segment of both casing parts has an opening, respectively, which openings are at least viewed in the flow direction by the pivoting of both casing parts relative to one another. Positioned and arranged to partially align with each other.

The only partial release of the entire opening surface used by the penetrating segment is that the partial release of the entire opening that can be used already avoids interruptions in the supply of cooling water and at the same time exceeds the amount of flow-through medium which is not filtered. It is advantageous when it can be prevented.

The bypass device according to the invention is advantageous in that it has a simple construction and a reliable working mode. To that extent, after overload-limited opening of the bypass, the filter element can be switched over again in a simple manner, i.e. by adjusting the rotatable casing part accordingly.

Bypass-Since only one movement adjustment of the rotatable casing is necessary for adjusting the operation,
And a return adjustment as described above requires only a corresponding single rotation of this casing part in the reverse direction. Therefore, the drive-through and holding parts, which reduce the free-flowing cross-section in a valuable manner and are at risk of contamination by accumulation, are not necessary.

By-passing-a conventional pressure differential control device for releasing pivoting of a pivotable casing part by eliminating shear pin locking devices or the like as a release device for operation. Depending on the use
A safe and reliable introduction of bypass-operation at defined overpressures is possible.

A structurally simple design of the device according to the invention is such that the penetrating segment has a bottom surface which coincides with the bottom surface of the filter segment, and the filter segment is preferably substantially radial in cross section. This is achieved by having a trapezoidal shape.

[0024] A feature of such an arrangement is that the penetrating segment can be covered in a simple manner by the filter segment, which results in a whirl formation or a high pressure resistance in the transition region between the casing halves. Without, a safe and reliable working form of the device can be obtained.

According to a further advantageous refinement of the invention, each casing part has an even number of segments, half of which are designed as filter segments and the other half as piercing segments. This makes it possible to open the maximum penetration surface in the flow-through of the cooling water in case of excessive impact in the cooling water.

When the casing part, which is pivotally mounted in the pipe part, pivots as little as possible, sufficient opening of the filter element for unimpeded flow-through of the cooling water in the bypass operation is ensured by This is achieved by alternating the penetrating segments in the casing part. As a result, each penetrating segment is located between two filter segments and each filter segment is adjacent to two penetrating segments.

Depending on the pipe diameter, 8 to 12 segments are provided in each casing part, in which case 4 to 6 segments are formed as penetrating segments and 4 to 6 segments as filter segments. I found it desirable to be.

However, the present invention does not limit the use of a predetermined number of segments. The rotation of the casing part, which is rotatably mounted in the tube part, is limited by an angle related to the number of segments, in which case
The rotation can be calculated by dividing the entire 360 ° circle by the number of segments.

It has been found to be advantageous if the casing part, which is arranged on the inlet side in the tube section, is connected to the wall of the tube section. Such an arrangement is particularly advantageous if the device according to the invention comprises a backwash device with a backwash rotor, which is known from the prior art. In this backwash device, the backwash is fixed to the central axis and is rotatable and has a suction shoe having an opening cross section that matches the opening cross section of the individual segments.

The backwash rotor is usually located in the tube section on the outlet side. In the case of overloading of the filter element, which requires a bypass-operating release, an unhindered adjustment of the casing part arranged on the outlet side can be performed. This is because this casing part is arranged in a position protected by a lower casing part fixed in the tube part.

According to the invention, the casing part, which is arranged rotatably in the tube part, is rotatable by a predetermined angle α, preferably via a drive. The drive device is also preferably configured as a spindle motor for driving a spindle which is connected to a casing part which is arranged rotatably in the tube part.

The advantages of the device constructed in this way are
The combination of a spindle motor and a spindle is structurally very simple to construct and allows a very uniform rotation of the casing part, which is pivotally mounted in the tube part. Other drive devices are also conceivable, for example hydraulic or pneumatic cylinders.

Furthermore, the spindle motor and the drive device via the spindle also have the advantage that the casing part can be pivoted very quickly, so that the entire device reacts very quickly when overloaded.

Further, it is preferable that the casing portion rotatably arranged in the pipe portion has a boss, and the driving device is engaged with the boss. Due to this, only a slight linear movement of the drive device is required to bring the penetrating segments into alignment with each other or to rotate the rotating casing parts back in after bypass-operation. Furthermore, the fixing of the individual segments to the boss is structurally problem-free.

Preferably, a spindle is connected to the first end of the hinged rod, the second end of the rod being fixed to the boss. With such a connection of the drive and the hinged rod, a large rotation angle can also be achieved, so that the device according to the invention also provides a sufficient penetration opening in bypass-operation with a small number of penetration segments or filter segments. Guarantee.

Furthermore, the advantage obtained by the above-described construction of the device according to the invention is that the operating member, ie the hinged rod, is washed by the cooling water which is constantly filtered in the filtering position of the device and therefore passes through the pipe section. The laterally extending operating member is free of deposits of sediment, such as seaweed or the like, which would cause failure.

Preferably, both casing parts are arranged such that from a first position in which the penetrating segment of the casing part overlaps with the filter segment of the second casing part in a precise position, the penetrating segment of the first casing part is in the second position. The angle α is chosen such that it can be displaced into a second position, which exactly overlaps the through segment of the casing part.

By virtue of such an arrangement, the particular eddy formation in the tube section, which is caused by the axially unpartitioned partition walls of the tube section which are restricted by the filter segment or the penetrating segment, is eliminated. can do. Furthermore, in this manner, the flow resistance of the filter segment is reduced in the open penetration segment.

The rotation of one of the casing parts is preferably stepless, independently of any adjustments which, if appropriate, indicate the minimum media passage. Stepless rotation can be achieved, inter alia, by the use of a drive device having a spindle motor and a spindle.

[0040]

Embodiments of the present invention shown in the drawings will be described in detail below.

In the right-angled pipe section 1 shown in FIGS. 1 to 4, pollutants, in particular solid components, are fed into the continuous stream of the flowing medium, that is to say after the condenser. A device 2 for capturing and removing from the cooling water stream is shown. The flow direction of the medium, i.e. the cooling water, is indicated by the arrow 3.

A filter member 4 is fitted in the pipe part 1, which comprises two casing parts 6, 6.
7 has a casing 5 which is arranged in the axial direction of the pipe section 1 in front of and behind one another in a manner apparent from the drawing.

Each casing portion 6, 7 comprises an outer peripheral wall 8 or 8'and a boss 9 or 9 ', and a plate-like member 10, between the outer peripheral wall and the boss.
10 'is as follows, that is, the plate-shaped members 10, 1
0'is arranged so as to divide the axially arranged surface of the tubular part of the cylindrical casing parts 6, 7 into twelve radially arranged trapezoidal segments.

These segments are alternately arranged as a filter segment 11 and a penetrating segment 12. The filter segment 11 has a filter plate 13 by these functions, and the filter plate is held between the pair of plate-shaped members 10, respectively.

In particular, as can be seen from FIG. 2, the filter plate 13 of the filter segment 11 has a frustoconical shape, and this frustoconical portion is the central axis 17 of the filter member 4.
Suitable for With such an arrangement, in addition to a very good filtration result, a simplification of the cleaning of the filter segment 11 with a backwash device is achieved. In contrast, the penetration segment 12 has a free penetration for cooling water.

In particular, as is apparent from FIG. 1, the lower casing part 6 is arranged in the pipe part 1 on the inlet side.
Are non-rotatably fixed to the tube part 1 via a web 14 arranged in a ring on the peripheral surface of the casing part 6, in which case the tube part 1 comprises two annular ring-shaped webs 15. In addition, the web 14 is held between these ring-shaped webs.

Casing part 7 arranged on the outlet side
Is rotatably mounted by its boss 9'on the boss 9 of the casing part 6 arranged on the inlet side,
Furthermore, the boss 9 of the casing part 6 bears on a central shaft 17 which engages through both casing parts 6, 7. In the exemplary embodiment, this central axis 17 is configured as a tube, the functioning of which is described further below.

To the boss 9'of the casing part 7 is fixed, preferably welded, an arc-sectioned thin plate 18, said thin plate having an eye at one end thereof. A rod 20 consisting of two sections 19, 19 'is hingedly mounted therein. Both sections 19, 1 of rod 20
The 9's are likewise hingedly connected to each other.

The other end of the rod 20 engages in the connecting piece 21 which penetrates the tube part 1 and is sealed thereto. A nut is arranged on the connecting pipe piece 21,
The nut is rotatably driven by a spindle motor 23, and the spindle motor itself
Exercise. Spindle motor 23 for manual operation
Further has a handle 24.

In particular, as can be seen from FIGS. 1 and 2, the device 2 further comprises a backwash device having a backwash rotor 25 with segmented suction shoes 25 ', the backwash rotor 25 comprising a central shaft 17; And is fixed to a shaft 26 which penetrates through the bosses 19 and 19 '. The backwash rotor 25 is arranged on the outlet side and has an opening towards the respective filter segment 11, the shape of which corresponds to the filter segment-plane.

The backwash rotor 25 is continuously rotated about its axis 26 at a low speed and the suction shoe 25 '.
During their rotation, each in turn engages radially arranged filter segments 11 for a short backwash time interval. The shaft 26 is flanged to a miter gear 27, which on the drive side is connected via a shaft 28 to the pipe section 1.
Is connected to a motor 29 arranged outside the.

As will be more apparent from FIGS. 1 and 2, a negative pressure conduit 30 is flanged to the lower end of the central shaft 17, and the negative pressure conduit 30 serves as a suction shoe 25 ′ of the backwash rotor 25. Creates a negative pressure in and in the connected conduits, which results in a filter segment during the backwash operation.
Components such as leaves or other contaminants collected in the filter plate 13 of 11 are dissociated from the filter plate 13 by the suction shoe 25 'and sucked in via the negative pressure conduit 30.

The plan views of the two casing parts 6, 7 shown in FIGS. 3 and 4 show the casing part 6 in a predetermined first position corresponding to FIGS. Each of the filter segments 11 is arranged to fit over the penetrating segment 12 of the lower casing part 6.

From the drawing it can be seen that the filter segments 11 and the penetrating segments 12 are arranged alternately in the casing parts 6 and 7, so that each filter segment is located between two penetrating segments 12, And each through segment 12 is located between two filter segments 11.

As a result, the penetrating segment 12 of the lower casing part 6 is covered by the filter segment 11 of the upper casing part 7 arranged above it, likewise the penetrating segment 12 of the upper casing part 7.
And the corresponding filter segment 11 of the lower casing part 6 is in the same condition. The device therefore acts as a filter in the already mentioned positions of both casing parts 6 and 7 in the pipe part 1, in this case the lower casing part 6
The cooling water flowing through the penetrating segment 12 of the filter segment 11 of the casing part 7 arranged above it.
Is filtered by.

The filter segment 11 in the casing parts 6 and 7 is shock-tightly closed, whereby the filter element 4
Upper casing part 7 in the event of pressure at
By a spindle motor 23 which is switched on by a conventional differential pressure measuring device when a predetermined overpressure is reached,
The penetrating segment 12 of the lower casing part 6 is pivoted relative to the lower casing part 6 by an angle α such that it overlaps the penetrating segment 12 of the upper casing part 7.

This opens up half of the total area of the filter element 4 fitted in the tube section 1 and thus further cools the subsequent device, for example a condenser, and interrupts the cooling water supply. A sufficient amount of cooling water that can be avoided can be passed through.

[0058]

According to the present invention, the casing has a plurality of casing portions arranged in front and rear in the axial direction of the pipe portion, and one casing portion is arranged in the pipe portion so as to be rotatable about the central axis. Both casing parts have a plurality of filter segments and at least one penetrating segment each having an opening for the passage of a medium, the relative rotation of the casing parts opening the penetrating segment for free flow. Cooling water can be passed through.

[Brief description of drawings]

1 is a cutaway side view of a tube section having a filter device according to the present invention.

2 is a sectional view of the tube portion according to FIG. 1, taken along the line AA.

3 is a cross-sectional view of the tube portion according to FIG. 1, taken along line BB.

4 is a cross-sectional view of the tube portion according to FIG. 1, taken along the line C-C.

[Explanation of symbols]

 1 Pipe part 4 Filter member 5 Casing 6,7 Casing part 8,8 'Outer peripheral wall 9,9' Boss 10 10 'Plate-like member 11 Filter segment 12 Through segment 13 Filter plate 17 Center shaft 22 Spindle 23 Spindle motor 25 Return Wash rotor

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location B01D 46/10 C 7446-4D 46/12 7446-4D B01D 29/04 530 A 29/38 580 F

Claims (14)

[Claims] 1. A filter member is fitted into a tubular portion having a circular cross section, the filter member having a plurality of filter segments arranged in a casing held on a central axis, the filter segments comprising: An apparatus for filtering a continuously flowing fluid medium or a gaseous medium, which has substantially the same structure and can be backwashed by a backwashing device rotatably fixed to a central axis of a filter segment, wherein the casing (5) Has at least two casing parts (6,7) arranged one behind the other in the axial direction of the pipe part (1), at least one of these casing parts (7)
Is arranged in the tube part (1) so as to be rotatable around the central axis (17), and furthermore both casing parts (6, 7) are
Each has a plurality of filter segments (11) and at least one penetrating segment (12) with an opening for the free passage of media, the opening of the penetrating segment (12) being A device for filtering a continuously flowing fluid medium or a gaseous medium, characterized in that the medium is made to flow freely by rotating the (6, 7) relative to each other. 2. The penetrating segment (12) has a bottom surface which corresponds to the bottom surface of the filter segment (11), and the filter segment (11) is substantially trapezoidal in radial cross section. An apparatus according to claim 1, characterized in that 3. The casing parts (6, 7) each have an even number of segments, half of which are configured as filter segments (11) and the other half as penetrating segments (12). The device according to claim 1 or 2, characterized in that: 4. A casing part (6) arranged in the pipe part (1) on the inlet side is fixed to the wall of the pipe part (1). The device according to claim 1. 5. The casing part (7) rotatably arranged in the pipe part (1) is rotatable by a predetermined angle α via a drive device. The described device. 6. A drive part is configured as a spindle motor (23) for driving a spindle (22) via a nut, said spindle comprising a casing part (1) rotatably arranged in a tube part (1). Device according to claim 5, characterized in that it is connected to (7). 7. A casing part (7) rotatably arranged in the pipe part (1) has a boss (9 '), to which a drive device is engaged. The device according to claim 6. 8. A spindle (22) is connected to a first end of a hinged rod (20), the second end of said rod being fixed to a boss (9 '). The device according to claim 6 or 7. 9. A first casing part (6) from a first position in which the penetrating segment (12) of the first casing part (6) exactly overlaps the filter segment (11) of the second casing part (7). The angle α is chosen such that the penetrating segment (12) is displaceable to a second position in which it exactly overlaps the penetrating segment (12) of the second casing part (7). 8. The device according to any one of 8. 10. A sensor is arranged in the region of the filter segment (11), which sensor measures the axial pressure of the pipe section (1) at the filter segment (4) and, via a differential pressure measuring device, the casing. Device according to any of the preceding claims, characterized in that it is adapted to generate a signal for controlling the rotation of the part (7). 11. Device according to claim 1, characterized in that the rotation of the casing part (7) is effected in a stepless manner in relation to the minimum amount of passage of the medium. 12. Device according to claim 1, characterized in that no penetrating segment (12) is arranged in the region of the drive member of the rotatable casing part (7). 13. The filter segment (11) comprises a filter plate (13) having a frusto-conical profile, the frusto-conical portion tapering towards the central axis (17). 13. A device according to any of claims 1 to 12, characterized in that 14. The filter segment (11) has a 90 ° angle.
Device according to any of the preceding claims, characterized in that it approaches the central axis (17) on the inlet side at a smaller angle β.