JP4454466B2 - Filter holder - Google Patents

Description

  The present invention relates to a filter holder that is provided in the middle of various pipes in, for example, a nuclear power plant, and traps foreign matters mixed in a fluid such as water passing through the pipe and is used for monitoring and managing the fluid.

  It is common to install a filter in the middle of a pipe in order to prevent foreign matter mixed in a fluid such as water from flowing downstream and to monitor dirt in the fluid. For example, in a nuclear power plant, it is used to extract metal from water flowing through a pipe. In either case, the filter must be replaced regularly or in a timely manner.

  FIG. 5 is a schematic view showing an example of a conventional filter holder. As shown in the figure, this type of filter holder 81 has a substantially plate-like lower holder member 82 and an upper holder member 83 with a filter 84 such as a filter paper sandwiched between them. The bolt 85 is assembled by fastening. Therefore, in order to replace the filter, it is necessary to disassemble and remove the filter holder 81 from the pipe provided with the filter, replace it, and reassemble it.

In order to solve such problems, a bypass is provided by branching from the pipe part provided with the filter, and a filter is provided also in this bypass so that even if the filter at the branch part becomes dirty and clogged, the bypass is bypassed. What has been proposed is also proposed (Patent Document 1).
Japanese Utility Model Publication No. 5-38493

  As described above, in the conventional filter folder 81, it is necessary to remove the filter holder 81 from the installation place when replacing the filter 84, which is troublesome. For this purpose, the apparatus must be stopped.

  In addition, it is necessary to confirm whether or not bolts 85 are tightened or loosened when removing and attaching a plurality of bolts 85 and reassembling them. Cost.

  And in order to remove the filter holder 81, it is necessary to drain the inside of the holder, but the draining work is currently performed using equipment such as a pump, and draining takes time and effort.

  The present invention has been proposed in view of the above problems, and its purpose is to allow the drainage in the holder to be performed easily and quickly, and to easily replace the filter with a simple operation. An object of the present invention is to provide a filter holder that can reduce the possibility of exposure by shortening the work time.

In order to achieve the above-mentioned object, the one according to claim 1 includes a fixed support member disposed above a storage space in which a holder portion into which a filter is placed can be stored;
An elevating support member disposed below the storage space;
Elevating means provided on the elevating support member and moving the elevating support member up and down;
A storage chamber that communicates with the flow path formed in the elevating support member, and whose volume fluctuates by the elevating operation of the elevating support member,
At the highest position of the elevating support member, a holder portion is held between the fixed support member, and the filter can be removed while being lowered from the highest position, and at the highest position of the elevating support member, the volume of the storage chamber The filter holder is characterized in that the volume of the storage chamber increases as the elevating support member descends and the fluid in the holder portion can be accommodated in the storage chamber.

  According to a second aspect of the present invention, a check valve capable of allowing fluid to flow only downstream is provided upstream of the communicating portion with the storage chamber in the flow path of the elevating support member. It is a filter holder of Claim 1 characterized by the above-mentioned.

  According to a third aspect of the present invention, there is provided a crank mechanism in which the elevating means engages the elevating support member with a crank portion that is rotated by operating the operating portion, and elevates the elevating support member. It is a filter holder of Claim 1 or 2 characterized by the above-mentioned.

  According to a fourth aspect of the present invention, a cylinder portion provided in a state in which the storage chamber is fixed to the fixed support member side, and is slidable in the vertical direction within the cylinder portion, and is directed downward from the lifting support member. 4. The structure according to claim 1, wherein the piston portion is formed to be surrounded by a piston portion provided on an intermediate rod provided in the inner rod, and the volume of the piston portion is changed by moving up and down together with the lifting support member. It is a filter holder in any one of.

According to the filter holder of the present invention, the following excellent effects can be obtained.
That is, according to the first aspect of the present invention, the holder portion of the filter is held between the fixed support member at the highest position of the lift support member that can be moved up and down, and the lift support member is lowered from the highest position. As a result, the holder part can be removed, so that the filter can be easily replaced by a simple operation. Further, when replacing the filter, the volume of the storage chamber gradually increases with the operation of lowering the lifting support member by the lifting means, and the volume of the storage chamber is maximized at the lowest position. By changing the volume of the storage chamber, the fluid in the holder part can be discharged easily and quickly. Therefore, the possibility of exposure can be reduced by shortening the time for replacing the filter.

  According to the second aspect of the present invention, a check valve capable of allowing fluid to flow only downstream is provided upstream of the communicating portion with the storage chamber in the flow path of the lifting support member. As a result, the fluid temporarily stored in the storage chamber is returned from the through passage on the downstream side of the check valve without returning the fluid to the holder side in accordance with the operation of exchanging the filter and raising the lifting support member again. Can be discharged.

  Further, according to the third aspect of the present invention, the lifting support member can be lifted and lowered simply by operating the operating portion and rotating the crank mechanism, so that it is not necessary to release the lock mechanism or the like. Thus, the filter can be easily replaced by a simple operation, and the possibility of exposure can be reduced by shortening the time for replacing the filter.

  According to the fourth aspect of the present invention, the storage chamber is provided in a state of being fixed to the fixed support member, and can be slidably moved in the vertical direction within the cylinder portion, and is supported to be lifted and lowered. Since it is formed to be surrounded by a piston part provided on an intermediate rod provided downward from the member, and the piston part moves up and down together with the lifting support member, the volume in the holder part is increased. Accordingly, the capacity of the storage chamber can be set freely, and the degree of freedom in design is increased.

Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.
FIG. 1 is a front sectional view showing a filter holding state in the filter holder of the present invention, and FIG. 2 is a front sectional view showing a filter replaceable state in the filter holder of the present invention.
As shown in these drawings, the filter holder 1 of the present embodiment is configured as a bowl-shaped device whose longitudinal direction is the vertical direction, and a holder in which a filter is placed in a substantially central portion of the device body 2. A storage space capable of storing the portion 3 is formed, an upper flow path 4 through which a fluid such as water passes is formed, and a fixed support member 11 disposed above the storage space, and a lower flow path 5 is formed to form the storage space. The elevating support member 12 disposed below the elevating support member 12, elevating means 15 for elevating and moving the elevating support member 12, and the lower flow path 5 of the elevating support member 12 communicate with the elevating and lowering member. A storage chamber 21 whose volume is changed by the raising and lowering operation of the support member 12 is schematically configured.

  Between the fixed support member 11 and the elevating support member 12 provided so as to be able to elevate at an interval so as to face the fixed support member 11, the vertical dimension is larger than that of the holder portion 3, and at least the front surface of the holder portion 3 is An open storage space is formed as a slot. Note that the holder portion 3 is a ring-shaped member that can be divided into upper and lower portions, and a sheet-like filter 23 is placed inside and held between the upper and lower members.

  The fixed support member 11 is a substantially columnar member formed by combining a plurality of divided parts, and is fixed to the upper ends of the vertical frames 25 and 26 of the apparatus main body 2. An upper flow path 4 for introducing a fluid such as water is formed on the fixed support member 11 so as to penetrate vertically, and an upper end portion thereof serves as a connection portion 28 of the upstream side pipe. A first check valve 33 that allows fluid to flow only downstream is interposed in the middle portion of the upper flow path 4.

  On the other hand, the elevating support member 12 is a vertically long member formed by combining a plurality of divided parts and configured to be movable up and down with respect to the apparatus main body 2. In order to support the holder portion 3 from below, A diameter-increased head portion 36 having a concave support portion 34 corresponding to the shape of the lower surface of the holder portion 3 is formed at the upper end. In addition, a piston portion 41 is provided at a lower portion of the elevating support member 12 via a columnar intermediate rod portion 37, and the piston portion 41 is provided at a lower end portion (that is, the fixed support member side) of the apparatus main body 2. It is arranged in a fixed substantially cylindrical body 39 so as to be movable up and down. The elevating support member 12 is formed with a lower flow path 5 for introducing a fluid such as water so as to penetrate the enlarged diameter head portion 36, the intermediate rod portion 37, and the piston portion 41 in the vertical direction. Becomes the connection part 29 of the downstream piping.

  The intermediate rod portion 37 is inserted into an insertion hole 42 formed in the upper portion of the cylinder portion 39 so as to be slidable. An inner wall portion of the insertion hole 42 has a sealing member 44 such as an O-ring. Is installed. The lower piston portion 41 of the intermediate rod portion 37 is formed with a diameter that is larger radially outward than the intermediate rod portion 37 and is housed in the cylinder portion 39 so as to be slidable in the vertical direction. A seal member 45 such as an O-ring is attached to the outer peripheral portion of the piston portion 41. When the piston part 41 descends in the cylinder part 39 as the elevating support member 12 descends, a storage chamber 21 for temporarily storing fluid is defined between them (see FIG. 2). The storage chamber 21 communicates with the lower flow path 5 via a communication flow path (communication portion) 48 that is formed in the vicinity of the piston portion 41 of the intermediate rod portion 37 in the radial direction. A second check valve 49 that allows fluid to flow only downstream is interposed at the upper end of the lower flow path 5, that is, upstream of the communication flow path 48.

  As described above, the elevating support member 12 is provided with elevating means 15 for elevating and moving the elevating support member 12. Specifically, rectangular recess-shaped engaging recesses 51 and 52 are formed on both side portions of the lifting support member 12, and the operating portions 55 and 56 of the lifting means 15 are engaged with these engaging recesses 51 and 52. It is made to do. As shown in FIGS. 1 to 4, the elevating means 15 is fixed to the crankshafts 61 and 62 that are pivotally supported by the apparatus main body 2 and the base end portions of the crankshafts 61 and 62, respectively. A crank mechanism comprising a gate-shaped operation portion (handle) 65 for manually operating the movement and a crank portion serving as the operation portions 55 and 56 that are eccentrically fixed to the distal ends of the crank shafts 61 and 62, respectively. It is configured. These crank portions 55 and 56 are arranged so as to be engaged in the engagement recesses 51 and 52, and when the crankshafts 61 and 62 are rotated by the handle 65, as shown in FIGS. The crank portions 55 and 56 are vertically moved in the engagement recesses 51 and 52 to move the lifting support member 12 up and down. That is, the concave support portion 34 on the upper surface of the lifting support member 12 moves up and down with the holder portion 3 placed thereon, and at the highest position, the upper surface of the holder portion 3 is pressed against the lower surface of the fixed support member 11 from below. When it is held and lowered from the highest position, the holder portion 3 can be removed.

  Next, based on FIG.3 and FIG.4, the operation | movement and effect | action when replacing | exchanging the filter 23 are demonstrated. 3 is a view taken in the direction of the arrows AA in FIG. 1, and FIG. 4 is a view taken in the direction of the arrows BB in FIG.

  The state shown in FIG. 3 is the state of the highest position of the elevating support member 12, and in this state, the holder portion 3 containing the filter 23 is held between the fixed support member 11. In this state, the crank portions 55 and 56 at the tips of the crankshafts 61 and 62 are erected along the vertical direction. As a result, the crank portions 55 and 56 are lifted and lowered via the engaging recesses 51 and 52 with which the crank portions 55 and 56 are engaged. The support member 12 is raised to the highest position. At this time, for example, the handle 65 is in a standing state along the longitudinal direction (vertical direction) of the apparatus, and is present at a position where it does not get in the way.

  When exchanging the filter 23, the holder portion 3 is pulled out to the front side. Therefore, in the present embodiment, as shown in FIG. 4, the handle 65 is tilted and rotated downward to a predetermined angle. The crankshafts 61 and 62 fixed to the rotary shaft are rotated, and the crank portions 55 and 56 fixed to the tips thereof are tilted. Then, the elevating support member 12 descends from the highest position as the crank portions 55 and 56 rotate, and descends to the lowest position as shown in FIG.

  In this state, the distance above the holder portion 3 is maximized, and the holder portion 3 can be pulled out of the storage space without damaging a seal member such as an O-ring when the filter 23 is replaced. Then, by separating the holder portion 3 up and down, the internal filter 23 can be easily and easily replaced.

  Further, the lifting support member 12 can be moved up and down simply by rotating the handle 65 and rotating the crank mechanism 15, and does not require the release of the lock mechanism or the like, and can be easily filtered by a simple operation. 23 replacement operations can be performed.

  As the elevating operation of the elevating support member 12 by the crank mechanism 15 is performed, the piston 41 is at the highest position at the highest position of the elevating support member 12, so the volume of the storage chamber 21 is minimized (see FIG. 1). Since the piston portion 41 descends as the elevating support member 12 is lowered, the volume of the storage chamber 21 gradually increases, and at the lowest position, the piston portion 41 is at the lowest position, so that the volume of the storage chamber 21 is maximized ( (See FIG. 2). That is, the handle 65 is tilted and turned downward to increase the volume of the storage chamber 21 in accordance with the operation of lowering the elevating support member 12, so that the fluid in the holder portion 3 can be easily and quickly discharged. 21 can be temporarily stored. Thereby, at the time of replacement | exchange of the filter 23, a fluid does not remain in the holder part 3, but the outflow of a extract can be prevented.

  In addition, a check valve 49 that allows fluid to flow only downstream is provided upstream of the communication channel (communication portion) 48 with the storage chamber 21 in the lower channel 5 formed in the elevating support member 12. Has been established. Therefore, after the filter 23 is replaced, the fluid temporarily stored in the storage chamber 21 due to the volume reduction of the storage chamber 21 caused by the operation of raising the handle 65 upward and raising the lifting support member 12 again. Can be discharged from the through channel 5 on the downstream side of the check valve 49. Therefore, equipment such as a pump is not required, and the fluid in the holder part can be discharged.

  As described above, according to the filter holder 1 of the present embodiment, since the operator's skill is not required for the replacement work of the filter 23, it is not necessary to select an operator, and the fluid in the holder portion can be easily and quickly supplied. Therefore, it is possible to reduce the possibility of exposure at a nuclear power plant.

In the above-described embodiment, the crank portions 55 and 56 stand with the handle 65 standing up and down, and the crank portion 55 and 56 tilts by tilting and turning the handle 65 downward. However, the present invention is not limited to this, and the crank portions 55 and 56 are erected while the handle 65 is tilted downward, and the crank portions 55 and 56 are tilted by operating the handle 65 to be erected upward. You may comprise as follows.
The lifting means may have any configuration as long as the lifting instruction member can be moved up and down, and is not limited to the crank mechanism. For example, a link mechanism may be used.

It is a front sectional view showing a filter holding state in the filter holder of the present invention. It is a front sectional view showing a filter exchangeable state in the filter holder of the present invention. It is an AA arrow line view of FIG. It is a BB line arrow directional view of FIG. It is a schematic diagram which shows an example of the conventional filter holder.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Filter holder 2 Apparatus main body 3 Holder part 4, 5 Through-flow path 11 Fixed support member 12 Lifting support member 15 Lifting means 21 Storage chamber 25, 26 Vertical frame 28 Connection part 29 of upstream piping 29 Connection part 33 of downstream piping 1 check valve 34 concave support portion 36 expanded head portion 37 intermediate rod portion 39 cylinder portion 41 piston portion 42 insertion holes 44, 45 sealing member 48 communication channel (communication portion)
49 Second check valve 51, 52 Engaging recess 55, 56 Crank part (actuating part)
61, 62 Crankshaft 65 Operation part (handle)

Claims (4)

A fixed support member disposed above a storage space capable of storing a holder portion in which a filter is placed;
An elevating support member disposed below the storage space;
Elevating means provided on the elevating support member and moving the elevating support member up and down;
A storage chamber that communicates with the flow path formed in the elevating support member, and whose volume fluctuates by the elevating operation of the elevating support member;
With
At the highest position of the lifting support member, a holder part is held between the fixed support member, and the filter can be removed while being lowered from the highest position.
The volume of the storage chamber is minimized at the highest position of the elevating support member, and the volume of the storage chamber increases as the elevating support member descends, so that the fluid in the holder portion can be accommodated in the storage chamber. Filter holder.   2. The filter according to claim 1, wherein a check valve that allows fluid to flow only downstream is provided upstream of the communicating portion with the storage chamber in the flow path of the elevating support member. holder.   2. The crank mechanism according to claim 1, wherein the elevating means is a crank mechanism that engages a lifting / lowering support member with a crank portion that is rotated by operating an operation portion, and moves the lifting / lowering support member up and down. 2. The filter holder according to 2.   The storage chamber is provided on a cylinder portion provided in a fixed state on the fixed support member side, and on an intermediate rod that is slidable in the vertical direction within the cylinder portion and provided downward from the lifting support member. The filter holder according to any one of claims 1 to 3, wherein the filter holder is formed so as to be surrounded by a piston portion, and the volume of the piston portion is changed by moving up and down together with the lifting support member.

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