JP2001314711A - Cleaning filter equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable the inspection of a filter and the exchange thereof for a short time without discharging the whole quantity of gas and liquid in the system. SOLUTION: This cleaning filter equipment is constituted of a dust removing part 90 which is attached to a piping which forms a flow passage of gas and liquid, and is attachably provided with a filter 903, an inspection and exchange part 91 which connects to the dust removing part 90 and has a desorption space 911 of the filter 903, a moving path 912 through which the filter 903 can be moved to the desorption space 911 and a window plate 913 which covers the desorption space 911 and a gate valve 92 in the moving path 912, which is disposed between the dust removing part 90 and the inspection and exchange part 91.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has an object to remove dust from a cleaning filter device, particularly a cooling system or a general pipe in a device such as a transformer or a reactor filled with gas and liquid, and the like. The present invention relates to a washing filter device installed in the above.

[0002]

2. Description of the Related Art FIG. 7 is a schematic diagram showing a structure of a cooler system for circulating gas and liquid to cool the equipment in a device such as a transformer or a reactor in which gas and liquid are sealed. In this figure, reference numeral 1 denotes a device main body such as a transformer or a reactor, 2 denotes an upper pipe provided at an upper portion of the device main body, and leads out gas and liquid;
Is an upper gate valve provided in this pipe, which opens and closes a gas-liquid flow path, 4 is an air release flange also provided in the upper pipe, 5 is a cooler coupled to the upper pipe to cool gas and liquid,
6 is an intermediate pipe for drawing out cooled gas-liquid, 7 is an oil flow indicator provided in the intermediate pipe, 8 is an oil pump for gas-liquid circulation, 9
Is a filter device for removing dust provided at a connection portion between the oil pump and the intermediate pipe, and is provided with a filter having a cross section as shown in FIG. 5B. 10 is a lower pipe connecting the oil pump and the lower part of the apparatus main body, 11 is a lower gate valve provided in the lower pipe to open and close a gas-liquid flow path, 12 is a drain valve also provided in the lower pipe, 13 Is a conservator.

In such a cooling system, inspection and replacement of the filter device for removing dust collected by the filter device 9 are performed in the following procedure. First, the oil pump 8 is stopped, and the upper and lower gate valves 3 and 11 are closed. In this state, the drain vent valve 12 of the lower pipe is opened and the drain of the cooler system is discharged while releasing the air vent flange 4 of the upper pipe to release the air. Thereafter, the filter device 9 is removed, and inspection, replacement, and the like are performed.

FIG. 5 is a schematic view showing a configuration in which a general pipe is provided with a filter device for removing dust.
FIG. 2 is a cross-sectional view illustrating a piping configuration, and FIG. In these figures, 20 and 21 are main pipes through which gas and liquid flow, 22 and 23 are first and second gate valves respectively mounted on the main pipe, and 24 is a first gate valve 22 and a second gate valve. An intermediate pipe connecting the gate valve 23 to the first valve 25, a filter device for dust removal disposed between the first gate valve 22 and the intermediate pipe 24, and a drain 26 for drain discharge provided in the intermediate pipe. It is a valve. In addition, a gas-liquid pump (not shown) is connected to the main pipes 20 and 21 at appropriate locations, and gas and liquid flow is performed.

In such a piping system, inspection, replacement and the like of the filter device for removing dust collected by the filter device 25 are performed in the following procedure. First, a gas-liquid pump (not shown) is stopped, the first and second gate valves 22 and 23 are closed, and then the drain valve 26 is opened to discharge the drain in the pipe. In that state, the first gate valve 2
2 and the intermediate pipe 24 are uncoupled and the filter device 25
Is removed and checked or replaced.

FIG. 6 is a schematic diagram showing a configuration in a case where a directional switching valve is employed in a general piping system. In this figure, reference numerals 30 and 31 denote main pipes through which gas-liquid flows, and 3
Reference numerals 2 and 33 denote first and second directional control valves mounted on the main pipe, respectively, and reference numerals 34 and 35 denote first and second directional control valves respectively connected to one of the first and second directional control valves. Curved piping,
36 is a first filter mounting pipe connected between the curved pipes 34 and 35, 37 is a mounted filter, 38 is a drain valve provided in the first filter mounting pipe, and 3
Reference numerals 9 and 40 denote third and fourth curved pipes respectively connected to the other flow ports of the first and second directional control valves, and 41 denotes a second filter connected between the curved pipes 39 and 40. A mounting pipe, 42 is a mounted filter, and 43 is a drain valve provided in the second filter mounting pipe. In addition, a gas-liquid pump (not shown) is connected to the main pipes 30 and 31 at appropriate locations, and gas-liquid flow is performed.

In such a piping system, inspection, replacement, etc. of the filter are performed in the following procedure. When checking or replacing the illustrated filter 42, first,
The flow direction of the first and second directional control valves 32 and 33 is switched to the first and second curved pipes 34 and 35 located above in the figure. The gas-liquid pump continues to operate without stopping. As a result, gas and liquid do not flow through the second filter device pipe 41, so that the drain valve 43 is opened and the drain is discharged, and the filter 42 is taken out for inspection and replacement. When checking or replacing the filter 37, the first and second directional control valves 32 and 33 are switched to the lower third and fourth curved pipes 39 and 40 in FIG. The operation is performed in the same manner as described above, with the gas-liquid flow 31 being switched to the lower path in the figure.

[0008]

The structure of the conventional filter device and the procedures for inspection and replacement are as described above. At least two gate valves are required on both sides of the filter device. There is a problem that it takes a long time from the stop of the liquid pump to the inspection and replacement of the filter device. In particular, in the drain discharge operation, although it depends on the system to be cleaned, there is a problem in that the drain discharge amount is generally large and the processing is troublesome. In addition, when a directional control valve is employed to perform the operation without stopping the gas-liquid pump, there is a problem that the installation space is widened in addition to being expensive. Further, since a cleaning filter device for equipment such as a transformer or a reactor is necessary only at the time of dust removal work of the equipment and becomes unnecessary after the work is completed, the cleaning filter device having the same shape and dimensions as the filter device at the end of the work is required. Although the spacer is mounted in place of the filter device, there is a problem that the manufacturing cost of the spacer is high.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has a simple structure, and can easily perform inspection and replacement work in a short time by discharging a small amount of gas and liquid. It is intended to provide a device.

[0010]

A cleaning filter device according to the present invention is mounted on a pipe forming a gas-liquid flow path,
A dust removing section provided with a filter that can be inserted and removed, a filter attaching / detaching space provided in connection with the dust removing section, a moving path through which the filter can be moved to the attaching / detaching space, and a window plate covering the attaching / detaching space. And a gate valve provided between the inspection and replacement unit and the dust removal unit and the inspection and replacement unit, which closes or opens the moving path.

[0011] In the cleaning filter device according to the present invention, the inspection and replacement section constitutes a room for preventing gas and liquid from flowing out of the piping and intrusion of outside air when the gate valve is opened and closed.

In the cleaning filter device according to the present invention, the filter is formed in a plate shape.

In the cleaning filter device according to the present invention, the gate valve is formed in a cylindrical shape, and has an opening at a predetermined position through which the filter can pass, and this opening can form a part of a moving path. In addition, the moving path can be closed at another predetermined position.

In the cleaning filter device according to the present invention, the window plate is formed of a transparent plate.

In the cleaning filter device according to the present invention, an insertion port of the insertion / removal rod is formed in the desorption space, and the insertion / removal rod is inserted into the insertion port when the gate valve is opened, so that the desorption space and the gate valve are separated. The filter penetrates through the opening and engages with the filter so that the filter can be pulled out to the detachable space.

Further, in the cleaning filter device according to the present invention, the shape and size of the dust removing portion are formed so as to be replaceable with a commercially available flange.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram showing the overall configuration when the present invention is applied to a device such as a transformer or a reactor in which gas-liquid is sealed, FIG. 2 is a plan view showing the configuration of the first embodiment, and FIG. FIG. 4 shows a configuration of the gate valve according to the first embodiment, and FIG. 4 (a) is a cross-sectional view taken along line AA of FIG.
(B) is a sectional view along line BB.

In FIG. 1, reference numeral 1 denotes an apparatus main body such as a transformer or a reactor, 2 denotes an upper pipe provided at an upper portion of the apparatus main body, and an upper pipe for leading gas and liquid. Upper gate valve that opens and closes, 4 is an air release flange also provided on the upper pipe, 5 is connected to the upper pipe,
A cooler for cooling gas and liquid, 6 is an intermediate pipe for drawing out cooled gas and liquid, 7 is an oil flow indicator provided in the intermediate pipe, 8 is an oil pump for circulating gas and liquid, 9 is an oil pump and an intermediate pipe. This is a filter device for removing dust provided at a joint portion with the filter, and its configuration will be described later. 10 is a lower pipe connecting the oil pump and the lower part of the device main body, 11 is provided in the lower pipe,
A lower gate valve for opening and closing the gas-liquid flow path, 12 is a drain vent valve similarly provided in the lower pipe, and 13 is a conservator.

Next, the structure of the filter device 9 will be described with reference to FIGS. The overall configuration is shown in FIGS. 2 and 3.
As shown in the figure, a dust removing section 90 accommodating a dust removing filter, an inspection and replacement section 91 provided in continuation of the dust removal section, and a gate valve 92 provided between the dust removal section and the inspection and replacement section. It is constituted by. The dust removing section 90 further includes a flange-shaped filter mounting section 901 mounted between the intermediate pipe 6 and the pipe 81 connected to the oil pump 8, and a groove formed on the inner peripheral surface of the filter mounting section. 902, and a disc-shaped filter 903 mounted in the above-described groove in a procedure described later.

The inspection and replacement unit 91 is composed of the following components. That is, reference numeral 911 designates a room for preventing gas and liquid from escaping in the system and preventing intrusion of outside air from outside the system when the gate valve described later is opened and closed, and a desorption space for checking and replacing the filter. Is a moving path formed between them so that the above-mentioned disc-shaped filter 903 can be moved between the filter mounting portion 901 and the detachable space 911,
Reference numeral 913 denotes a transparent window plate that covers the detachable space, 914 denotes a window plate pressing mechanism that presses the window plate from all sides to maintain airtightness in the detachable space 911, and 915 denotes a drain and a vacuum provided on the side of the inspection and replacement unit. The valve is connected to a small-sized vacuum pump (not shown) to evacuate, thereby draining the inside of the desorption space 911 and evacuating. 916
Is a position extending in the extending direction of the moving path 912, that is, provided at the left end of the inspection and replacement unit in FIG. 2, and a through hole continuous with the moving path 912 is provided.
The insertion and withdrawal rod is inserted into the moving path 91
2 and a length reaching the disc-shaped filter 903, and an engagement portion (not shown) for engaging with the disc-shaped filter 903 is formed at the tip. When the insertion / extraction rod 917 and the through hole 916 are combined, airtightness is maintained by an O-ring (not shown) structure.

Further, as shown in FIGS. 4 (a) and 4 (b), the gate valve 92 has a cylindrical valve body 921, a rubber lining 922 on its peripheral surface, and a central portion of the valve body. An opening 923 penetrating linearly through the axis of the valve body is provided. The length and width of the opening 923 are set so that the disc-shaped filter 903 can pass through. The opening 92
A slightly wide portion 924 is formed at the center of the center 3 so that the tip of the above-mentioned insertion / withdrawal rod 917 can pass through the disk-shaped filter without hindrance. 92
Reference numeral 5 denotes an opening / closing handle for operating the valve body. When the opening / closing handle 925 is in the “open” position, the opening 923 of the valve body is continuous with the moving path 912 so as to constitute a part of the moving path.

Next, a procedure for cleaning equipment and checking or replacing a filter according to the first embodiment will be described for a transformer or a reactor at a factory manufacturing stage. First, the cleaning filter device 9 is mounted between the intermediate pipe 6 and the pipe 81 connected to the oil pump, and the handle 925 of the gate valve 92 is rotated to the “closed” position in FIG. The part 91 is shut off. At this time, the disc-shaped filter 903 is not mounted on the dust removing unit 90. Next, the gas-liquid is sealed in the transformer or reactor equipment main body 1, the window plate holding mechanism 914 of the inspection and replacement unit 91 is loosened, the window plate 913 is removed, and a disk-shaped filter 903 is provided in a detachable space 911 inside the window plate 913. Insert The detached window plate 913 is mounted again on the detachable space to cover it, and the window plate 913 is fastened and fixed by the window plate holding mechanism 914.

Next, the tip of the insertion / withdrawal rod 917 is inserted into the through hole 916 of the inspection and replacement unit 91, and the tip is engaged and connected to the disc-shaped filter 903 in the detachable space. In this state, a vacuum pump (not shown) is connected to the evacuation valve 915 of the inspection and replacement unit 91, and the inspection and replacement unit 91 is evacuated. Thereafter, the handle 925 of the gate valve 92 is rotated 90 ° clockwise in FIG. 3 to open the gate valve 92. At this time, the opening 923 of the valve body 921 is
As shown in (a) and (b), since the moving path 912 is oriented in the extending direction (the left-right direction in FIG. 3), the moving paths 912 on both sides of the valve body communicate with each other through the opening 923. Subsequently, by pushing the insertion / withdrawal rod 917 into the through hole 916, the disc-shaped filter 903 is moved rightward in FIGS. 2 and 3 from the desorption space 911 and passes through the opening 923 of the valve body. As a result, the filter 903 is mounted by being inserted into a groove 902 provided on the inner peripheral surface of the filter mounting portion 901. The oil pump 8 is started in a state where the insertion / pull-out bar 917 is engaged with the filter 903, and cleaning of the device main body 1 is started.

When the clogging of the filter 903 is confirmed by the oil flow indicator 7 provided in the intermediate pipe 6, the oil pump 8 is stopped to finish the washing. After that, the insertion / withdrawal rod 91
7 is pulled out to the left in FIGS.
03 is located in the desorption space 911 via the opening 923 of the valve body. In this state, the handle 925 of the gate valve 92
3 is rotated counterclockwise by 90 ° in FIG. 3 to the “closed” position, and the drainage in the inspection and replacement unit is performed from the evacuation valve 915 of the inspection and replacement unit 91. Next, the window plate holding mechanism 914 of the inspection and replacement unit 91 is loosened, the window plate 913 is removed, and the filter 903 is taken out of the detachable space 911. If the degree of dust removal is not sufficient, the filter is mounted again by the above-described procedure, and washing is repeated. In the case of transformers and reactors, after cleaning at the factory manufacturing stage is completed, a cleaning filter device is no longer necessary, so the shape and dimensions of the dust removal section are set to shapes and dimensions that can be replaced with commercially available flanges. At the end of cleaning, a commercially available flange is mounted as a spacer in place of the dust removing section.

[0025]

The cleaning filter device according to the present invention has the following features.
A dust removal unit that is attached to a pipe that forms a gas-liquid flow path and that is provided so as to be able to insert and remove a filter and that is connected to the dust removal unit, and that removes the filter and moves the filter to this removal space A check valve provided between the inspection and replacement unit and the dust removal unit and the check and exchange unit having a moving path to be obtained and a window plate covering the detachable space, and a gate valve for closing or opening the moving path; The inspection and replacement section is designed to form a room that prevents the flow of gas and liquid in the system and the intrusion of outside air when the gate valve is opened and closed. Inspection and replacement of the filter can be performed by discharging only a small amount.

Further, since the filter is formed in a plate shape, it can be easily moved along the moving path, and can be easily moved to the inspection and replacement section through the opening provided in the gate valve. , Inspection and replacement work can be facilitated.

Further, since the window plate is made of a transparent plate,
The status of the desorption space and the filter can be easily checked from outside.

Further, since there is no need to remove the device or disassemble the filter mounting portion, the number of steps for inspection and replacement of the filter is reduced, and the inspection and replacement can be performed in a short time. Further, since the vacuum can be evacuated from the inspection and replacement unit using a small-sized vacuum pump, the filter can be easily replaced without invading outside air even after the final vacuum degassing and lubrication. When used in transformers and reactors, cleaning is not required after cleaning at the factory manufacturing stage, but a commercially available flange can be installed as a spacer instead of the dust removal part. Thus, the apparatus can be configured at low cost. In addition, when used in a transformer or a reactor, there is no space limitation in product design, so that there is also an effect that it is not necessary to perform a special design in consideration of a piping system for dust removal work.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing an overall configuration when the present invention is applied to a device such as a transformer and a reactor.

FIG. 2 is a plan view showing the configuration of the first embodiment.

FIG. 3 is a side view showing the configuration of the first embodiment.

4A and 4B illustrate a configuration of a gate valve according to the first embodiment, in which FIG. 4A is a cross-sectional view taken along line AA in FIG.
FIG. 3 is a sectional view taken along line BB of FIG. 2.

FIG. 5 is a schematic diagram showing a configuration in a case where a filter device is provided in a conventional general piping system.

FIG. 6 is a schematic diagram showing a configuration in a case where a filter device is provided in a conventional general piping system that employs a direction switching valve.

FIG. 7 is a schematic diagram showing a configuration of a cooler system of a conventional device such as a transformer and a reactor.

[Explanation of symbols]

1 Equipment main body, 2 Upper piping, 3 Upper gate valve, 8 Oil pump, 9 Filter device, 10 Lower piping, 11
Lower gate valve, 90 Dust removal unit, 91 Inspection and replacement unit, 9
2 Gate valve, 901 Filter mounting part, 902
Groove, 903 filter, 911 Detachable space, 91
2 Moving path, 913 window plate, 914 window plate holding mechanism,
916 through hole, 917 insertion / extraction rod, 921 valve body, 923 opening.

Claims (7)

[Claims] Claims: 1. A gas and liquid flow path,
A dust removing portion provided with a filter removably disposed therein, provided in connection with the dust removing portion, a filter attaching / detaching space, a moving path through which the filter can be moved to the attaching / detaching space, and a window covering the attaching / detaching space. A cleaning filter device comprising: a check and exchange unit having a plate; and a gate valve provided between the dust removal unit and the check and exchange unit to close or open the moving path. 2. The cleaning filter device according to claim 1, wherein the inspection and replacement unit forms a room for preventing the gas-liquid flow in the pipe and the invasion of outside air when the gate valve is opened and closed. 3. The cleaning filter device according to claim 1, wherein the filter is formed in a plate shape. 4. The gate valve is formed in a cylindrical shape, has an opening at a predetermined position through which a filter can pass, and this opening can form a part of a moving path, and another predetermined valve can be formed. The cleaning filter device according to any one of claims 1 to 3, wherein the moving path can be closed at the position. 5. The cleaning filter device according to claim 1, wherein the window plate is formed of a transparent plate. 6. An insertion hole for an insertion / removal rod is formed in a desorption space, and the insertion / removal rod is inserted into the insertion hole when the gate valve is opened, so that the filter penetrates through the desorption space and the opening of the gate valve. The cleaning filter device according to any one of claims 1 to 5, wherein the filter is engaged so that the filter can be pulled out to a desorption space. 7. The cleaning filter device according to claim 1, wherein a shape and a size of the dust removing portion are shapes and sizes that can be replaced with commercially available flanges.