JP2009047244A - Attaching/detaching device of accessory component - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an attaching/detaching device of an accessory component capable of easily performing the cleaning work of a flange on a fluid pipe side in a non water cut-off state without increasing the size of the attaching/detaching device. <P>SOLUTION: The attaching/detaching device of the accessory component comprises a valve casing 10 of a division structure for covering a space between a flange 5 on a fluid pipe 1 side and a flange on an accessory component side in a watertight manner, a valve element 11 arranged on the valve casing 10 and inserted between the flanges, a pressing unit 12 which is provided on the valve casing 10 to press the valve element 11 toward the flange 5 on the fluid pipe 1 side, and a fitting casing 14 which is communicated with the valve casing 10 in a watertight manner and attachable/detachable thereto/therefrom. The pressing unit 12 presses the valve element 11 toward the flange 5 on the fluid pipe 1 side, and a sweeper rod 25 for cleaning a joining surface 5a of the flange 5 on the fluid pipe 1 side after detaching the accessory is penetrated through the fitting casing 14. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an attachment / detachment apparatus for an attachment part that attaches / detaches an attachment part connected through a flange at a branch portion of a fluid pipe in an undisturbed state of water.

  Conventionally, when accessories such as an air valve and a repair valve connected to a branch portion of an existing pipe via a flange are detached from the fluid pipe for replacement or maintenance, the accessory parts are removed from the fluid pipe. When removing, a large amount of fluid in the pipe flows out due to water pressure etc., so the flow of fluid in the fluid pipe to which the accessory is connected is blocked, and the bolt that connects the flanges is inserted and removed to remove the accessory. Was. In addition, when replacing accessory parts connected to a branch part in an uninterrupted state, the branch part is covered from the outside including the accessory part with a sealed case, and attached to the flange of the branch part from the outside of the sealed case. A work valve that partitions the inside of the sealed case is used to press the parts and replace the attached parts (see, for example, Patent Document 1).

Japanese Patent No. 3533276 (page 3, FIG. 3)

  However, in Patent Document 1, it is necessary to stand a relatively large sealed case so as not to leak with respect to the branch portion and the attached parts, and approach the flange on the fluid pipe side from the outside of the large sealed case. There is a problem that it is difficult to clean the flange.

  The present invention has been made paying attention to such a problem, and the attachment for detaching the flange on the fluid pipe side can be easily performed in an indefinite water state without increasing the size of the apparatus for desorption. It is an object of the present invention to provide a component detaching apparatus.

In order to solve the above problem, an attachment / detachment device for an accessory according to claim 1 of the present invention provides:
An attachment / detachment device for an attachment for attaching / detaching an attachment connected through a flange at a branch portion of a fluid pipe in an undisturbed state of water,
A valve housing having a split structure for watertightly covering between the flange on the fluid pipe side and the flange on the accessory part side;
A valve body disposed in the valve housing and insertable between the two flanges;
A pressing portion that is provided in the valve housing and presses the valve body toward the flange on the fluid pipe side;
A mounting housing that is detachably mounted in watertight communication with the valve housing;
With
A sweeper rod that cleans a joint surface of the flange on the fluid pipe side is provided in the mounting housing after the pressing portion presses the valve body toward the flange on the fluid pipe side and the accessory part is removed. It is characterized by being.
According to this feature, the valve housing that is directly attached to the flange and the mounting housing that communicates with the valve housing can be relatively miniaturized, and the attached parts can be removed using the sweeper rod that penetrates the miniaturized mounting housing. The flange joint on the fluid pipe side exposed by opening the body is easily approached and cleaned toward the flange, so that new accessories can be attached to the cleaned flange. Therefore, the attachment / detachment operation of the accessory parts can be reliably performed without leaking from the fluid pipe through the flange without using a water stop means for stopping the water in the branch part of the fluid pipe.

An attachment / detachment device for an accessory according to claim 2 of the present invention is the attachment / detachment device for an accessory according to claim 1,
The mounting housing is provided with an annular body having elasticity and through which the sweeper rod passes.
According to this feature, the sweeper rod can be freely moved back and forth and right and left with an elastic annular body as a fulcrum, so that the entire surface of the joint surface of the flange can be cleaned.

The attachment / detachment device for an accessory part according to claim 3 of the present invention is the attachment / detachment device for an accessory part according to claim 1 or 2,
The mounting housing is provided with a light transmitting portion that transmits light toward the joint surface of the flange on the fluid pipe side.
According to this feature, the joint surface can be reliably cleaned by the sweeper rod without leaving a foreign matter or the like while visually confirming the joint surface of the flange on the fluid pipe side through the light transmitting portion provided in the mounting housing.

The attachment / detachment device for an accessory part according to claim 4 of the present invention is the attachment / detachment device for an accessory part according to claim 3,
The translucent portion is formed in an annular shape through which the sweeper rod passes.
According to this feature, since the translucent portion through which the sweeper rod passes is formed in an annular shape, it is easy to visually check the sweeper rod approaching the joint surface of the flange through the translucent portion over the entire joint surface. .

The attachment / detachment device for an accessory part according to claim 5 of the present invention is the attachment / detachment device for an accessory part according to any one of claims 1 to 4,
The sweeper rod is provided substantially coaxially with the flange on the fluid pipe side.
According to this feature, the sweeper rod provided substantially coaxially with the flange on the fluid pipe side can be approached evenly in the circumferential direction over the entire joint surface of the flange.

  Examples of the present invention will be described below.

  An embodiment of the present invention will be described with reference to the drawings. First, FIG. 1 is a front view showing a fluid pipe to which a repair valve and an air valve as accessory parts are connected. FIG. 2 is a front view showing the fluid pipe with the air valve removed. FIG. 3 is a perspective view showing the valve housing and the flange body. Fig.4 (a) is a top view which shows the partial cross section of a valve housing | casing, (b) is a side view like (a). FIG. 5 is a cross-sectional view showing a state in which the valve housing is attached to the flange. FIG. 6 is a cross-sectional view showing a state where the repair valve is removed. Fig.7 (a) is a top view of a flange body, (b) is a side view which shows a partial cross section similarly to (a). FIG. 8A is a plan view showing a mounting housing through which a sweeper rod is provided, and FIG. 8B is a side sectional view similar to FIG. FIG. 9 is a cross-sectional view showing a state in which the attachment housing is attached. FIG. 10 is a cross-sectional view illustrating a situation where the flange is cleaned using the sweeper rod. Fig.11 (a) is a top view which shows a fixed plate, (b) is sectional drawing which shows the condition which newly connects a short tube. FIG. 12 is a cross-sectional view showing a state where a short pipe and a repair valve are newly connected and a valve housing is removed. FIG. 13 is a front view showing a state where a short pipe, a repair valve, and an air valve are newly connected.

  FIG. 1 shows a fluid pipe 1 through which clean water to which the present invention is applied, a repair valve 2 as an attached accessory attached thereto, and an air valve 7 connected to the repair valve 2. . The repair valve 2 has a flange 2a on the accessory part side provided at the lower end and is joined to the upper outer peripheral surface of the fluid pipe 1 and is provided at the upper end of the branch pipe 4 as an upward branch. The two flanges 2 a and 5 are joined by a plurality of existing bolts 3 while facing each other via a sheet packing (not shown).

  The air valve 7 is mainly composed of a valve box 7a having an air hole and a float (not shown) accommodated in the valve box 7a, and the inside of the valve box 7a is further connected via the repair valve 2 and the branch pipe 4. The fluid pipe 1 communicates with the inside of the fluid pipe 1 so that the air in the fluid pipe 1 is discharged to the outside or the outside air can be taken into the fluid pipe 1 by the float that is vertically displaced according to the water level in the fluid pipe 1. It is made up.

  The repair valve 2 has a rotating valve 2c that rotates so as to be openable and closable inside the valve box 2b (see FIG. 5). In normal times, the rotating valve 2c is open and the air valve 7 and the fluid pipe 1 are open. However, when the air valve 7 is inspected or replaced, the rotary valve 2c is closed so that the air valve 7 can be removed. Further, the valve box 2b and the flange 2a are located relatively close to each other.

  In the following, the removal of the existing accessory parts and the attachment of the new accessory parts in the continuous water state will be described.

  As shown in FIG. 2, after turning the handle 2d of the repair valve 2 to close the rotary valve 2c in the valve box 2b, the bolts that connected the repair valve 2 and the air valve 7 Remove the nut 8 and remove the air valve 7. Subsequently, one of the plurality of existing bolts 3 connecting the flange 5 of the branch pipe 4 and the flange 2a of the repair valve 2 is removed, and a work bolt 9 is attached instead. This operation is repeated to replace all the existing bolts 3 with new work bolts 9. By doing in this way, the removal operation | work of the work volt | bolt 9 at the time of valve housing 10 attachment mentioned later becomes easy (refer FIG. 5). Although the fluid pipe 1 is filled with clean water and has an internal pressure, even if one of the plurality of existing bolts 3 is temporarily removed, the other bolts 3 and 9 cause the fluid pipe 1 to There is no water leaking from the outside.

  Next, as described later, an attachment / detachment device for an accessory is disposed on the outer peripheral surface side of the fluid pipe 1. As shown in FIG. 3, the detaching apparatus includes a valve housing 10 having a split structure in which a space between opposing joint surfaces of the flange 5 of the branch pipe 4 and the flange 2 a of the repair valve 2 is watertightly covered, and the valve housing 10. And a valve body 11 which can be fitted between the opposing joint surfaces of both flanges 2a and 5 and is configured mainly. Further, pressing bolts 12 as pressing portions that press the valve body 11 toward the flange 5 of the branch pipe 4 are respectively screwed and provided at a total of three positions spaced apart in the circumferential direction of the valve housing 10. It has been. Further, a flange body 13 interposed between the mounting housing 14 and the valve housing 10 to be mounted as described later is formed to be detachable from the valve housing 10.

  As shown in FIGS. 4A and 4B, the valve housing 10 will be described in detail. The valve housing 10 has a two-divided structure connected by bolts and nuts 19 and includes both flanges 2a and 5a. And a receiving portion 10b for receiving the valve body 11 so that the valve body 11 can be inserted into and removed from the cylindrical portion 10a through the opening 10c, and extends over the inner peripheral surface of the cylindrical portion 10a. A waterproof member 15 having elasticity is disposed. The valve body 11 has a flat surface that can cover the opening of the flange 5 over the entire surface. As shown in FIG. 5, the lower surface of the valve body 11 that abuts on the upper surface 5 a as the joint surface of the flange 5 is made of rubber or the like. It is comprised with the member which has waterproofness. Moreover, the operation handle 11a connected to the valve body 11 protrudes outside from the end surface of the accommodating part 10b. Further, a drain valve 38 is disposed on the upper surface of the accommodating portion 10b so that water in the accommodating portion 10b can be drained.

  Next, the attachment of the valve housing 10 to the flanges 2a and 5 will be described. The valve body 11 is accommodated in the accommodating portion 10b, and the tip of the pressing bolt 12 is located outward from the inner peripheral surface of the cylindrical portion 10a. In the screwed state, the waterproof member 15 disposed on the inner peripheral surface of the cylindrical portion 10a is brought into close contact with the outer peripheral surface of the flanges 2a and 5 in the circumferential direction, and the valve is provided between the joint surfaces of the flanges 2a and 5. The valve housing 10 is attached to the flanges 2a and 5 at a height position where the body 11 can be inserted. Positioning of the valve housing 10 with respect to the flanges 2a and 5 is possible by appropriately screwing the bolt 20 screwed in the vertical direction into the lower portion of the cylindrical portion 10a. By mounting in this way, the joint surface of the flanges 2a and 5 is covered with the valve housing 10 in a watertight manner.

  Subsequently, the work bolt 9 that water-tightly connects both the flanges 2a and 5 is loosened, and the repair valve 2 is attached to the flange 5 so that a slight gap is formed between the opposing joint surfaces of the two flanges 2a and 5. Float upward. At this time, since the space between the joint surfaces of both flanges 2a and 5 is covered with the waterproof member 15 in the circumferential direction in a watertight manner, water in the fluid pipe 1 leaks from between the joint surfaces of both flanges 2a and 5. There is no.

  Next, as shown in FIG. 5, the valve element 11 is inserted between the joint surfaces of the flanges 2 a and 5 in which a gap is formed by using the operation handle 11 a. At this time, the guide bolt 21 screwed into the accommodating portion 10b is screwed in appropriately, the height position of the tip of the valve body 11 is adjusted, and the valve body 11 is guided between the joint surfaces of both the flanges 2a and 5. it can.

  After inserting the valve body 11, the pressing bolt 12 is screwed inward in the radial direction of the cylindrical portion 10a. The tip of the pressing bolt 12 has a tapered taper surface 12a. As the pressing bolt 12 is screwed inward, the upper surface of the valve body 11 is gradually pressed downward by the tapered surface 12a of the pressing bolt 12. (Refer to the dotted-line box in the figure). By this action, the lower surface of the valve body made of a waterproof member and the upper surface 5a of the flange 5 are in close contact with each other, and the opening of the flange 5 of the valve body 11 is covered with the valve body 11 in a watertight manner.

  Next, as shown in FIG. 6, the work bolt 9 is removed and the repair valve 2 is removed. At this time, since the opening of the flange 5 is covered with the valve body 11 in a watertight manner, the water in the fluid pipe 1 does not leak from the opening of the flange 5.

  Then, the flange body 13 is inserted into the cylindrical portion 10 a of the valve housing 10 whose upper side is opened by removing the repair valve 2. As shown in FIGS. 7A and 7B, the flange body 13 is formed of an integral flange that can be fitted into the valve housing 10 and has an inner diameter that is substantially the same as the outer diameter of the cylindrical portion 10a. In addition, it has a larger diameter than the flange 5. A packing 16 is disposed in a groove formed on the inner peripheral surface of the flange body 13. Further, the valve housing 10 and the flange body 13 have a groove 10d formed in the circumferential direction at the upper part of the outer peripheral surface of the cylindrical portion 10a, and the circumferential direction of the flange body 13 so as to be fitted in the groove 10d. A pair of engaging portions each including a plurality of bolts 17 screwed in the radial direction are provided at predetermined intervals. The flange body 13 is fitted and inserted into the cylindrical portion 10a of the valve housing 10, and the bolts 17 are screwed and fitted into the concave groove 10d to engage the bodies 10 and 13.

  Thus, not only the number of components of the flange body 13 can be suppressed to make it easy to configure the detachable device, but also the flange body 13 consisting of only the integral flange can be easily attached only by being inserted into the valve housing 10.

  Moreover, since both the bodies 10 and 13 can be engaged by the concave grooves 10d and the bolts 17 as a pair of engaging portions provided in the flange body 13 and the valve housing 10 in this way, It can prevent that both the bodies 10 and 13 remove | deviate.

  Further, in this way, the pair of engaging portions can be simply constituted by the concave groove 10d and the bolt 17, and the flange body 13 and the valve housing 10 can be securely connected by fitting the bolt 17 into the concave groove 10d. Can be engaged.

  Next, as shown in FIGS. 8 (a) and 8 (b), the mounting housing 14 is a cylindrical shape having a flange having substantially the same diameter as the flange body 13 and having a lower end opened. A lid 23 having four window portions 23b penetrating the upper and lower surfaces in the circumferential direction is attached in a watertight manner by bolts and nuts 28 through an acrylic plate 24 as a translucent portion having a disc shape and translucency. ing. That is, the inside of the mounting housing 14 can be visually confirmed through the acrylic plate 24 in the window portion 23b. Further, a connector 27 as an annular body made of a rubber cylinder having elasticity is attached to the center of the upper surface of the lid 23 by a bolt 32, and a through hole of the connector 27 provided substantially coaxially, the lid A sweeper rod 25 penetrates the center hole 23a of the body 23 and the center hole 24a of the acrylic plate 24 in a watertight manner in the vertical direction.

  The sweeper rod 25 is a rod-like body provided with a tapered scraping portion 26 at the lower end, can be moved up and down as described later, and has a slightly small diameter provided at a substantially central height position of the connector 27. The neck portion 27a is used as a fulcrum so that it can be rotated in a watertight manner.

  As shown in FIG. 9, the mounting housing 14 with the sweeper rod 25 penetrating the upper surface of the flange body 13 engaged with the valve housing 10 is mounted with bolts and nuts 18. A packing 22 is disposed in a groove formed on the upper surface of the flange body 13, and the flange body 13 and the mounting housing 14 are connected in a watertight manner. Further, the sweeper rod 25 is penetrated substantially coaxially with the flange 5 when the mounting housing 14 is mounted.

  As described above, a large space for the sweeper rod 25 can be secured inside the mounting housing 14 that is attached via the flange body 13 that has a larger diameter than the flange 5.

  Next, as shown in FIG. 10, the valve body 11 is accommodated in the accommodating portion 10b, the opening of the flange 5 is opened, the upper end side of the sweeper rod 25 is gripped, and the scraping portion on the lower end side is operated. 26 is approached to the exposed upper surface 5a of the flange 5. Then, the upper end side of the sweeper rod 25 is rotated to bring the scraping portion 26 into contact with the entire upper surface 5a of the flange 5, and foreign matter such as existing packing pieces and dust remaining on the upper surface 5a. Remove.

  Regarding the removal of the removed foreign matter, the sweeper rod 25 is lifted in a state of being locked to the locking portion 26a provided in the scraping portion 26, and then the valve body 11 is closed and discharged out of the mounting housing 14. Or, it is discharged out of the mounting housing 14 together with the fluid in the mounting housing 14 through a drain port (not shown) provided in the mounting housing 14.

  At this time, since the sweeper rod 25 can be freely moved back and forth and right and left with the neck portion 27a of the connector 27 having elasticity as a fulcrum, the entire upper surface 5a of the flange 5 can be cleaned. In particular, the connector 27 has a slightly small-diameter neck portion 27a at a substantially central height position, and the sweeper rod 25 can be easily operated by bending the connector 27 at the neck portion 27a.

  Further, the upper surface 5a can be reliably cleaned by the sweeper rod 25 without leaving any foreign matter while visually confirming the upper surface 5a of the flange 5 through the acrylic plate 24 provided in the mounting housing 14.

  Furthermore, since the acrylic plate 24 through which the sweeper rod 25 passes is formed in an annular shape, the sweeper rod 25 approaching the upper surface 5a of the flange 5 can be easily visually confirmed through the acrylic plate 24 over the entire upper surface 5a.

  Further, by using the sweeper rod 25 penetrating substantially coaxially with the flange 5 on the fluid pipe 1 side, the entire surface of the upper surface 5a of the flange 5 can be approached evenly in the circumferential direction.

  As described above, after cleaning the upper surface 5 a of the flange 5 using the sweeper rod 25, the opening of the flange 5 is again covered with the valve body 11 in a watertight manner. 11 (b), flanges 29a and 29b having substantially the same diameter as the flange 5, that is, substantially the same diameter as the inner diameter of the cylindrical portion 10a of the valve housing 10 are provided at both ends, and substantially the same as the branching portion 4. A short pipe 29 as a newly attached accessory having the same inner diameter is connected to the flange 5.

  The connection of the short pipe 29 will be described in detail. First, the flange 29a at the lower end of the short pipe 29 is arranged so as to abut along the inner periphery of the cylindrical portion 10a, and then the substantially fan shape shown in FIG. A plurality of fixing plates 30 having bolt holes 30 a and 30 b are placed on the upper surface of the flange body 13 positioned above the flange at the lower end of the short tube 29, and bolt holes on the outer peripheral side of the fixing plate 30 are placed. It fixes to the flange body 13 along the circumferential direction with the bolt and nut 18 inserted in 30a.

  Next, as shown in FIG. 11 (b), the push bolt 31 is screwed downward into the bolt hole 30 b on the inner peripheral side of the fixing plate 30. The push bolt 31 presses the short pipe 29 downward toward the flange 5 using the fixing plate 30 connected to the flange body 13 as a reaction force. As described above, the flange 29a of the short tube 29 is substantially the same diameter as the inner diameter of the cylindrical portion 10a of the valve housing 10, and is downwardly slidably contacted with the waterproof member 15 provided on the inner periphery of the cylindrical portion 10a. Moving.

  Then, at the position where the short pipe 29 is pressed to the vicinity of the upper part of the flange 5, the flange 42 a at the lower end of the repair valve 42 is joined to the flange 29 b at the upper end of the short pipe 29 and connected by a bolt / nut 45 (FIG. 12). reference). The valve element 42c of the repair valve 42 is rotated and closed by the handle 42d.

  Next, the valve body 11 is accommodated again in the accommodating portion 10b, the opening of the flange 5 is opened, the lower surface of the flange of the short tube 29 and the upper surface 5a of the flange 5 are brought into contact with each other, and the short tube 29 and the flange 5 and bolts and nuts 43 are connected. Subsequently, as shown in FIG. 12, the valve housing 10, the flange body 13, and the fixing plate 30 attached to the flange 5 are removed.

  Finally, as shown in FIG. 13, an air valve 47 is attached to the upper side of the repair valve 42 with bolts and nuts 48. The air valve 47 is configured with substantially the same specifications as the existing air valve 7. By turning the handle 42d of the repair valve 42 to open the repair valve 42, the air valve 47 and the fluid pipe 1 communicate with each other, and a new repair valve 42 and an air valve 47 are connected as accessory parts. Is completed. It should be noted that the attachment / detachment of the attached parts can be converted to a new repair valve 42 or air valve 47, and the existing repair valve 2 or air valve 7 can be inspected and maintained, and these can be reattached.

  As described above, the valve housing 10 that is directly attached to the flange 5 and the mounting housing 14 that communicates with the valve housing 10 can be relatively miniaturized, and the sweeper rod 25 that penetrates the downsized mounting housing 14 is used. The upper surface 5a of the flange 5 on the side of the fluid pipe 1 exposed by removing the repair valve 2 as an existing accessory and opening the valve body 11 is easily approached toward the flange 5. By cleaning, the short pipe 29 as an additional part can be newly attached to the flange 5 after cleaning without interposing foreign matter or the like, so a water stop means for stopping the inside of the branch portion 4 of the fluid pipe 1 is provided. Therefore, the attachment / detachment operation of the accessory parts can be reliably performed without leaking from the fluid pipe 1 through the flange 5.

  Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications and additions within the scope of the present invention are included in the present invention. It is.

  For example, in the above embodiment, the fluid flowing through the fluid pipe 1 is clean water, but, for example, sewage may flow through the fluid pipe, or oils, gases, or the like may flow through the fluid pipe.

  Moreover, in the said Example, although the repair valve 2 and the short pipe 29 are shown as an accessory, if an accessory is connected to a fluid pipe | tube via a connection part, for example, an air valve, a pressure, etc. It may be a meter such as a meter or a flow meter.

  Moreover, in the said Example, although the acrylic board 24 as a translucent part which has a disk shape and has a hole in the center is provided in the upper end of the attachment housing | casing 14, for example, an attachment housing | casing is used as a translucent part. You may make it comprise the cylindrical part extended in the up-down direction of 14 with the member which has translucency, such as an acrylic cylindrical member.

  Furthermore, in the above-described embodiment, the connector 27 as an annular body made of a rubber cylinder having elasticity is attached to the mounting housing 14. For example, as the annular body, a plate-like shape through which the sweeper rod 25 passes is provided. The body may be attached.

It is a front view which shows the fluid pipe | tube with which the repair valve and air valve as an accessory were connected. It is a front view which shows the fluid pipe | tube which removed the air valve. It is a perspective view which shows a valve housing and a flange body. (A) is a top view which shows the partial cross section of a valve housing | casing, (b) is a side view like (a). It is sectional drawing which shows the state which attached the valve housing | casing to the flange. It is sectional drawing which shows the state which removed the repair valve. (A) is a top view of a flange body, (b) is a side view which shows a partial cross section similarly to (a). (A) is a top view which shows the attachment housing | casing by which the sweeper rod was penetrated, (b) is a sectional side view like (a). It is sectional drawing which shows the state which attached the attachment housing | casing. It is sectional drawing which shows the condition which cleans a flange using a sweeper rod. (A) is a top view which shows a stationary plate, (b) is sectional drawing which shows the condition which connects a short pipe newly. It is sectional drawing which shows the state which connected the short pipe and the repair valve newly and removed the valve housing | casing. It is a front view which shows the state which connected the short pipe, the repair valve, and the air valve newly.

Explanation of symbols

1 Fluid pipe 2 Repair valve (accessory part)
2a Flange (Flange on the accessory side)
4 Branch pipe (branch part)
5 Flange (Flange on the fluid pipe side)
5a Top surface (joint surface)
7 Air valve 10 Valve housing 11 Valve body 12 Pressing bolt (pressing part)
13 Flange body 14 Mounting housing 15 Waterproof member 23 Lid body 24 Acrylic plate (translucent portion)
25 Sweeper rod 27 Connector (annular body)
29 Short pipe (accessory)
29a Flange (Flange on the accessory side)
30 Fixing plate 42 Repair valve 47 Air valve

Claims (5)

An attachment / detachment device for an attachment for attaching / detaching an attachment connected through a flange at a branch portion of a fluid pipe in an undisturbed state of water,
A valve housing having a split structure for watertightly covering between the flange on the fluid pipe side and the flange on the accessory part side;
A valve body disposed in the valve housing and insertable between the two flanges;
A pressing portion that is provided in the valve housing and presses the valve body toward the flange on the fluid pipe side;
A mounting housing that is detachably mounted in watertight communication with the valve housing;
With
A sweeper rod that cleans a joint surface of the flange on the fluid pipe side is provided in the mounting housing after the pressing portion presses the valve body toward the flange on the fluid pipe side and the accessory part is removed. An attachment / detachment device for attached parts, characterized in that   The attachment / detachment device for an accessory part according to claim 1, wherein the attachment housing is provided with an annular body having elasticity and through which the sweeper rod passes.   The attachment / detachment device for an accessory according to claim 1, wherein the attachment housing is provided with a light-transmitting portion that transmits light toward a joint surface of the flange on the fluid pipe side.   The attachment / detachment device for an accessory part according to claim 3, wherein the translucent part is formed in an annular shape through which the sweeper rod passes.   The attachment / detachment device for an accessory part according to any one of claims 1 to 4, wherein the sweeper rod is provided substantially coaxially with a flange on the fluid pipe side.

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