JP5112227B2 - Detaching device and method for pipe connecting member - Google Patents

Description

  The present invention sealably attaches to a pair of flanges coupled with a predetermined number of bolts via a packing between a communicating part communicating with an existing fluid pipe and a pipe connecting member connected to the communicating part. The present invention relates to a pipe connecting member detaching apparatus and method for sealing a communicating portion between opposing surfaces of a flange and detaching the pipe connecting member in an uninterrupted state.

  When a pipe connection member such as an air valve or a repair valve that is connected to a communicating part of an existing fluid pipe via a flange is removed from the existing fluid pipe for replacement or maintenance, the existing fluid pipe is in a non-continuous flow state. In order to remove the pipe connecting member while maintaining the pressure, the connecting portion and the pipe connecting member are water-tightly covered by a detachable device having a valve body, and the opposing surfaces of the pair of flanges interposed between the communicating portion and the pipe connecting member are separated from each other. In addition, there is one in which a valve body is inserted between the communication part and the pipe connection member to stop water for the communication part, and the existing pipe connection member is replaced with a new pipe connection member (for example, Patent Documents). 1).

JP 2008-51231 A (page 8, FIG. 6)

  However, in Patent Document 1, when the gap is formed between the opposing surfaces of the flange, the sealing member is pressed against the peripheral surface of the flange using the flange of the pipe connecting member, so that from the pipe connecting member side. Therefore, if the flange peripheral surface of the pipe connecting member, which is an existing member, has a portion that is unevenly formed due to corrosion or the like, this portion may cause water leakage. It was.

  The present invention has been made paying attention to such problems, and in the desorption device attached to the pair of flanges between the communication portion communicating with the existing fluid pipe and the pipe connection member, the pipe connection member side is reliably secured. It is an object of the present invention to provide an apparatus and method for detaching a pipe connecting member that can be sealed.

In order to solve the above-mentioned problem, a desorption device for a pipe connection member according to claim 1 of the present invention provides:
Between the communicating part communicating with the existing fluid pipe and the pipe connecting member connected to the communicating part, a pair of flanges coupled with a predetermined number of bolts via packing is sealed in a sealed manner. A decoupling device for a pipe connecting member that seals the communicating portion between opposing faces and desorbs the pipe connecting member in an uninterrupted flow state,
A valve body that is inserted after forming a gap between the opposing surfaces of the pair of flanges and seals the communicating portion;
A valve body housing portion that houses the valve body so that the valve body can be operated from the outside, and a mounting member that is attached in a sealed manner so that a gap can be formed between the pair of flanges.
The mounting member includes a pressing portion that presses the valve body inserted into the gap against the flange on the communication portion side, and the pipe connecting member can be removed from the communication portion while the valve body is pressed by the pressing portion. An inner wall provided along the outer periphery of the flange on the connecting member side,
The flange on the tube connecting member side is provided with a plate member into which a sealing member is fitted in the circumferential direction, and the sealing member seals between the inner wall portion and the plate member, and the plate member Has a divided structure divided into the number of bolts connecting the pair of flanges, and a bolt hole through which the bolt is inserted is formed in each divided plate member. It is said.
According to this feature, when the gap is formed between the opposing surfaces of the flange, a sealing member for sealing the inner wall is newly installed between the inner wall of the mounting member and the plate member, that is, without using the existing flange. These members can contact each other in the circumferential direction and can be reliably sealed. In particular, since the flange on the pipe connecting member side is provided with a plate member on which the sealing member is fitted in the circumferential direction, the sealing member can reliably follow the movement of the flange on the pipe connecting member side. .

The pipe connecting member detaching apparatus according to claim 2 of the present invention is the pipe connecting member detaching apparatus according to claim 1,
The sealing member is characterized in that an outer surface of the sealing member is interposed at a contact position where the outer surface of the sealing member contacts both the flange on the pipe connecting member side and the inner wall portion.
According to this feature, since the sealing member directly contacts and seals against both the flange on the pipe connecting member side and the inner wall portion, a special sealing means is provided between each plate member having the divided structure. There is no need for fluid to leak out.

The pipe connecting member detaching device according to claim 3 of the present invention is the pipe connecting member detaching device according to claim 1 or 2,
When the gap is formed between the opposing surfaces of the pair of flanges, a peeling means for peeling packing waste adhering to the flange on the communication portion side is further configured.
According to this feature, even when packing waste adheres to the flange on the communication portion side when forming the gap, the communication portion can be reliably sealed by the valve body by peeling the packing waste by the peeling means.

The method for attaching and detaching the pipe connecting member according to claim 4 of the present invention comprises:
Between the communicating part communicating with the existing fluid pipe and the pipe connecting member connected to the communicating part, a pair of flanges coupled with a predetermined number of bolts via packing is sealed in a sealed manner. A method of detaching a pipe connecting member that seals the communicating portion between opposing surfaces and detaches the pipe connecting member in an uninterrupted flow state,
A valve body that is inserted after forming a gap between the opposing surfaces of the pair of flanges and seals the communicating portion;
A valve body housing portion that houses the valve body so as to be operable from the outside, and an attachment member that is attached in a sealed manner so that a gap can be formed between the pair of flanges.
The mounting member includes a pressing portion that presses the valve body inserted into the gap against the flange on the communication portion side, and the pipe connecting member can be removed from the communication portion while the valve body is pressed by the pressing portion. An inner wall provided along the outer periphery of the flange on the connecting member side,
The flange on the tube connecting member side is provided with a plate member into which a sealing member is fitted in the circumferential direction, and the sealing member seals between the inner wall portion and the plate member, and the plate member Has a divided structure divided into the number of bolts connecting the pair of flanges, and each divided plate member is formed with a bolt hole through which the bolt is inserted,
The existing bolts connecting the pair of flanges are removed, and the bolts for connecting the pair of flanges are replaced one by one with the working bolts inserted through the bolt holes of the divided plate members, and the plate members A bolt replacement step for fitting the sealing member to
After the bolt exchanging step, the mounting member is attached to the pair of flanges in a sealed manner; and
After the mounting step, a gap forming step of loosening the bolt to form a gap between the opposing surfaces of the pair of flanges;
A valve body insertion step of inserting the valve body into the gap after the gap formation step;
After the valve body insertion step, a valve body pressing step of pressing the valve body against the flange on the communication portion side by the pressing portion;
After the valve body pressing step, it is constituted by a detaching step of detaching the pipe connecting member in a state where the valve body is pressed by the pressing portion.
According to this feature, when the gap is formed between the opposing surfaces of the flange in the gap forming step, the sealing member that seals between the flange on the pipe connecting member side and the inner wall is formed by the inner wall of the mounting member and the plate member. Between the new members without using the existing flange, and can be reliably sealed by abutting over the circumferential direction. In particular, the flange on the pipe connecting member side is provided with a plate member on which the sealing member is fitted in the circumferential direction, so that the sealing member can move against the movement of the flange on the pipe connecting member side in the gap forming step. In addition to being able to reliably follow, plate members that have split structures and bolt holes formed in each are inserted through a specified number of bolts, one by one, while the plate members remain sealed. Can be attached.

  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 state in which an air valve and a repair valve in an embodiment of the present invention are attached to an existing fluid pipe through a communication portion. FIG. 2 is a front view showing a state where work bolts and nuts and a water stop plate are attached between the flanges, and FIG. 3A is a plan view showing a state where the water stop plate is attached to the flange. 3 (b) is a partially broken AA cross-sectional view in FIG. 3 (a), and FIG. 4 shows the desorption device sealed between the flange on the communication portion side and the flange on the repair valve side. FIG. 5 is a partially broken plan view showing the configuration of the desorption device, FIG. 6 is a sectional view taken along the line CC in FIG. 5, and FIG. Partial breakage showing a state where the flange on the communication side and the flange on the repair valve side are separated FIG. 8 is an enlarged cross-sectional view showing a state in which the valve body is inserted into a gap between the flange on the communication portion side and the flange on the repair valve side, and FIG. FIG. 10 is an enlarged cross-sectional view showing a state in which sealing of the communication portion is completed, FIG. 10 is an enlarged cross-sectional view showing a state in which the air valve and the repair valve are removed from the communication portion, and FIG. FIG. 12 is a front view showing a state in which the repair valve is attached to the communication portion, FIG. 12 is a front view showing a modification device, and FIG. 13 is a cross-sectional view showing a state in which the window portion is attached to the attachment member. FIG. Hereinafter, the front side of the paper surface in FIGS. 1 to 3A, 4 and 6 to 12 is the front side of the desorption device, the back side of the paper surface is the rear side, and the lower side of the paper surface in FIGS. 3B and 5. Will be described with the front side of the detaching apparatus and the upper side of the drawing as the rear side.

  Reference numeral 1 in FIG. 1 is an existing fluid pipe in which a fluid such as tap water flows in the pipe. Above the existing fluid pipe 1, a communication portion B communicating with the inside of the existing fluid pipe 1 is provided so as to protrude upward. In addition, an air valve AV1 is attached to the communication part B via a repair valve V1.

  Specifically, a pair of seats Z2 of the flange F2 of the repair valve V1 is connected to the seat Z1 of the flange F1 of the communication part B through the packing P in a water-tight manner (see FIG. 3B). The seat of the flange F4 of the air valve AV1 is connected in a watertight manner to the seat of the flange F3 of the repair valve V1 through a packing. The air valve AV1 is a member for releasing the air in the existing fluid pipe 1 to the outside of the pipe and preventing negative pressure in the existing fluid pipe 1. The repair valve V1 is a member of the air valve AV1. This is a member for temporarily opening and closing the flow from the communication portion B when repairing, adjusting, etc., and this repair valve V1 constitutes a pipe connecting member in the present invention.

  When the repair or adjustment of the air valve AV1 becomes impossible due to a failure of the repair valve V1 or the like, and the repair valve V1 itself needs to be replaced, etc., the pipe connecting member detaching apparatus and method of the present invention are employed. The

  Next, a desorbing device for a pipe connecting member for desorbing a repair valve as a pipe connecting member and a method thereof will be described.

  First, as shown in FIG. 1, the flange F2 of the repair valve V1 connected to the flange F1 and the flange F1 of the communicating portion B by four existing bolts and nuts BN1 at equal intervals is cleaned, and the flange Check the status of F1 and F2. If there are irregularities that adversely affect the sealing of the packing, etc., repair them, then remove the bolts and nuts BN1 from the flanges F1 and F2 one by one, and install new work bolts and nuts BN2. As shown, all bolts and nuts BN1 are replaced with working bolts and nuts BN2. At this time, the bolts and nuts are removed and attached one by one, and the remaining three bolts and nuts are attached to the flanges F1 and F2. Watertightness between the flanges F1, F2 is maintained by three bolts and nuts.

  When the bolt / nut BN1 is replaced with the working bolt / nut BN2, the water stop plate 2 as the plate member in the present invention shown in FIG. 3A is attached to the flange F2.

  As shown in FIGS. 3A and 3B, the water stop plate 2 is formed in an annular shape having a slightly larger diameter than the flanges F1 and F2, and is a bolt connecting the flanges F1 and F2. -It has the division structure divided | segmented into the four fan-shaped plate pieces 2a which are the same number as nut BN1. Each plate piece 2a is provided with a bolt hole 2b for inserting a work bolt / nut BN2. The plate pieces 2a are individually inserted into the flange F2 by the work bolt / nut BN2 through the bolt hole 2b. Can be attached to.

  In this way, when the water stop plate 2 is attached to the flange F2, the connection between the flanges F1 and F2 can be maintained by any three of the bolt / nut BN1 and the work bolt / nut BN2. ing.

  Moreover, the groove part 2c is formed in the outer peripheral side surface of the water stop plate 2 over the circumferential direction perimeter of the water stop plate 2, and this groove part 2c is used as a sealing member in the present invention formed in an annular shape. The sealing rubber 2e is fitted.

  Similarly, a notch 2d is formed in the lower part of the water stop plate 2 over the entire circumference in the circumferential direction. With the water stop plate 2 attached to the flange F2, the notch 2d and the upper peripheral edge of the flange F2 The sealing rubber 2f as a sealing member is fitted into the groove portion formed in step 1 so that the outer surface of the sealing rubber 2f comes into contact with the flange F2 on the repair valve V1 side. The sealing rubbers 2e and 2f are in contact with an inner wall 3e of the mounting member 5 to be described later so as to be sealed.

  Although not particularly illustrated, packing may be attached to the divided end face of each plate piece 2a, and when the water stop plate 2 is attached to the flange F2, water leakage between the plate pieces 2a may be prevented.

  As shown in FIG. 3B, the working bolt / nut BN2 is composed of nuts N, N, a bolt BL, and a washer W. The nut N is screwed with a bolt BL on the inner peripheral surface. An insertable female screw is screwed. Further, even if a predetermined gap 25 (described later) is formed between the flanges F1 and F2 (see FIG. 7), the bolt BL has a length enough to engage with the female thread of the nut N, and the flanges F1 and F2 In the inserted state, the flanges F1 and F2 are connected in a watertight manner by screwing a washer W and a nut N from above and below, respectively.

  The washer W includes an annular packing for sealing, and a metal washer that covers the outer peripheral surface and one plane of the packing. The same packing is also attached to the water stop plate 2. Therefore, by replacing the bolt / nut BN1 with the working bolt / nut BN2, water leakage from the bolt connection holes of the flanges F1, F2 is prevented by the packing of the upper and lower washers W.

  Then, as described above, after the water stop plate 2 is attached to the flange F2 by connecting the flanges F1 and F2 with the working bolts and nuts BN2, as shown in FIG. The desorption device 3 of the invention is attached in a sealed manner. This desorption device 3 seals the communication part B between the opposing flanges F1 and F2, thereby detaching the air valve and the repair valve while keeping the existing fluid pipe 1 in an uninterrupted flow state as will be described later.

  Here, the configuration of the desorption device 3 will be described in detail.

  As shown in FIGS. 4 and 5, the detaching device 3 is attached in a sealed manner so that a gap can be formed between the valve body 4 for sealing the seat Z1 of the flange F1 of the communicating portion B and the pair of flanges F1 and F2. And the mounting member 5 to be formed. Furthermore, the attachment member 5 includes a first divided portion 3a having a valve body storage portion 13 in which the valve body 4 is stored, and a second divided portion 3b connected to the first divided portion 3a. Among these, both the 1st division | segmentation part 3a and the 2nd division | segmentation part 3b are formed in the planar view substantially semicircle.

  The front and rear end portions of the first divided portion 3a are provided with hooking portions 3c and 3c for inserting the connecting bolt / nut BN3. The front and rear end portions of the second divided portion 3b are provided with the first divided portion. Similar to 3a, latching portions 3d and 3d for inserting the connecting bolt / nut BN3 are provided.

  Then, the front and rear end portions of the first divided portion 3a and the front and rear end portions of the second divided portion 3b are brought into contact with each other, and the connecting bolt / nut BN3 is inserted between the front and rear hooking portions 3c and 3d. The division part 3a and the second division part 3b are connected to each other, and the attachment / detachment device 3 is attached between the flanges F1, F2. At this time, the first divided portion 3a and the second divided portion 3b are connected to constitute the attachment member 5 in the present invention having a substantially annular shape in plan view.

  In addition, packing is attached to the front and rear end surfaces of the first divided portion 3a and the second divided portion 3b that are in contact with each other over the entire length in the vertical direction, and both packings are tightened to the connecting bolt / nut BN3. Water leakage from between the first divided portion 3a and the second divided portion 3b is prevented.

  Further, the inner side of the attachment member 5 is formed in an inner wall portion 3e formed to have a slightly larger diameter than the water stop plate 2 along the outer periphery of the flanges F1 and F2. A packing P2 is provided at the lower portion of the inner wall 3e over the entire circumference of the inner wall 3e, and the packing P2 is divided into a first divided portion 3a side and a second divided portion 3b side. Further, the inner wall portion 3e is formed substantially flush with the vertical direction, and the repair valve V1 can be removed away from the communication portion B in the detaching process described later.

  Projecting pieces 6, 6 are extended from the lower end portion of the mounting member 5 toward the direction of diameter reduction of the mounting member 5, that is, the mounting member 5 is viewed in a longitudinal section by the inner wall portion 3 e and the projecting piece 6. It is formed in a substantially L shape. These projecting pieces 6 and 6 are formed with screw holes 6a and 6a in the front and rear. Further, a support bolt 7 is screwed into each screw hole 6a from below.

  A plurality of insertion pieces 8 and gap forming pieces 9 are extended on the inner wall 3 e of the attachment member 5 in the direction of the diameter reduction of the attachment member 5. The end portions on the inner diameter side of the attachment member 5 of the insertion piece 8 and the gap forming piece 9 have a thickness that can be inserted between the opposed surfaces of the connected flanges F1 and F2. For this reason, when attaching the detaching device 3 to the flanges F1 and F2, positioning of the detaching device 3 is performed by inserting the inner diameter side ends of the insertion piece 8 and the gap forming piece 9 between the opposing surfaces of the flanges F1 and F2. It is to be made.

  In particular, as shown in FIG. 6, the gap forming piece 9 is a plate body that is formed in a substantially square shape that is bent at a substantially central portion when viewed from the side, and is arranged in the radial direction of the mounting member 5. It is pivotally supported by a support rod 10 provided inside, and the outer diameter side end of the gap forming piece 9 is pressed downward, so that the gap forming piece 9 The inner diameter side end is pivotable upward.

  An insertion hole 11 is formed above the outer diameter side end of the gap forming piece 9. An operation bolt 12 that presses the outer diameter side end of the gap forming piece 9 from above is screwed into the insertion hole 11. It is inserted. Packing is wound around the heads of these operation bolts 12 to prevent water leakage from the insertion holes 11.

  As shown in FIGS. 4 and 5, the valve body 4 is provided in a valve body storage portion 13 provided in the attachment member 5. Specifically, the valve body storage portion 13 is formed in a rectangular shape in plan view and is provided in the first divided portion 3a, and the inside of the valve body storage portion 13 is communicated with the inner wall portion 3e of the mounting member 5. A storage space 14 for storing the valve body 4 is formed.

  The valve body 4 stored in the storage space 14 is a substantially rectangular plate having a front-rear width dimension that is longer than the diameter of the communication portion B. As shown in FIG. 5, a handle 16 that is operated from the outside of the valve body storage portion 13 is connected to the right end portion of the valve body 4 through a communication hole 15 formed on the right side surface of the valve body storage portion 13. The valve body 4 is sealed by the handle 16 between a sealing position for sealing the communication portion B (a chain line shown in FIG. 5) and a storage position (the solid line and dotted line shown in FIG. 5) stored in the storage space 14. It can be operated between.

  Since the diameter of the communication hole 15 is slightly larger than the diameter of the handle 16 inserted through the communication hole 15, when the valve body 4 is operated in the left-right direction, the valve is moved in the vertical direction and the front-rear direction. The body 4 can be slightly inclined. The communication hole 15 is provided with a packing to prevent water leakage from the communication hole 15.

  In the illustrated left end portion of the valve body 4, when packing scrap which will be described later adheres to the flange F1 when the communication portion B is sealed by the valve body 4, the packing scrap is peeled off from the flange F1. A peeling portion 17 is formed as a peeling means. As shown in FIG. 4, the peeling portion 17 includes a tapered portion 17 a that is inclined leftward from the upper surface to the lower surface side of the valve body 4, and slightly upward from the left lower end portion of the valve body 4. The hooking portion 17b is extended and has a tip formed at an acute angle.

  Further, the lower surface of the valve body 4 is covered with an elastic seal member, although not particularly shown. As shown in FIG. 6, a sealing recess 18 is formed in the approximate center of the lower surface of the valve body 4 from below, and the flange F1 is disposed in a state where the valve body 4 is disposed at the sealing position as will be described later. The communication part B is sealed by the valve body 4 by the upper surface of the seat Z1 coming into contact with the lower surface of the sealing recess 18. Note that the lower surface of the valve body is not necessarily limited to the one in which the sealing recess 18 is provided, and may be planar.

  A drain valve 19 communicating with the inside of the storage space 14 is provided at the upper part of the valve body storage portion 13. By opening the drain valve 19, the air and tap water in the storage space 14 are desorbed. 3 can be discharged to the outside.

  Further, as shown in FIGS. 4 and 5, when the valve body 4 is disposed at the sealing position, the valve body 4 is separated from the seat Z1 of the flange F1 of the communication portion B as described later. The accommodating part 20 which accommodates the performed packing waste is provided. In detail, the accommodating part 20 is formed in a rectangular shape in plan view, and faces the valve element accommodating part 13 provided on the front side in the insertion direction in which the valve element 4 is inserted, that is, the first divided part 3a. The second dividing unit 3b is provided.

  The inside of the accommodating part 20 is formed in the accommodating space 21 for accommodating packing waste peeled off by the valve body 4, and the tip part of the valve body 4 arranged at the sealing position is arranged. Yes.

  In addition, a translucent panel 22 as a window portion made of translucent resin, glass, or the like is attached to the left end portion of the accommodating portion 20 in a watertight manner through a packing, and the inside of the accommodating portion 20 is Visible through the translucent panel 22.

  Further, two through holes 23 and 23 are formed in the attachment member 5 at positions above the valve body 4 arranged at the sealing position on the valve body storage portion 13 side and the storage portion 20 side, respectively. A fixing bolt 24 as a pressing portion in the present invention is screwed into these through holes 23, and the upper surface of the valve body 4 arranged at the sealing position is pressed by the lower surface of the fixing bolt 24, thereby allowing the valve body 4 to be pressed. Can be fixed in a sealed position.

  Next, desorption of the pipe connecting member using the desorption apparatus 3 will be described in the order of steps.

  The bolt replacement process will be described. First, as shown in FIGS. 1 to 3A and 3B, the bolt / nut BN1 is removed from the single flanges F1 and F2. Then, the plate piece 2a is brought into contact with the flange F2 where the bolt / nut BN1 is removed from above. At this time, the bolt BL of the work bolt / nut BN2 is inserted from the bolt hole 2b of the plate piece 2a. Further, the nuts are screwed onto the bolt BL from above and below, whereby the flanges F1 and F2 are fastened from above and below and the plate piece 2a is attached.

  Thereafter, the bolts and nuts BN1 attached to the flanges F1 and F2 are replaced with working bolts and nuts BN2 one by one, and the plate piece 2a is attached to the flange F2.

  Next, the attachment process will be described. As shown in FIG. 4, the attachment / detachment device 3 is attached to the flanges F1, F2. First, the insertion piece 8 and the gap forming piece 9 of the first divided portion 3a are inserted between the opposing surfaces between the flanges F1 and F2. Then, the insertion piece 8 and the gap forming piece 9 of the second divided portion 3b are inserted between the opposing surfaces between the flanges F1 and F2, and connected to the latching portions 3c and 3c of the first divided portion 3a and the second divided portion 3b. By inserting and tightening the bolt and nut BN3, the detaching device 3 is attached to the flanges F1 and F2.

  At this time, the sealing rubbers 2e and 2f are in contact with the inner wall 3e of the mounting member 5 over the entire circumference, and the packing P2 is in contact with the flange F1 over the entire circumference. In particular, since the sealing rubber 2f fitted in the notch 2d abuts the outer surface against both the flange F2 and the inner wall 3e, the detaching device 3 is sealed above and below the flanges F1 and F2.

  Further, by rotating the support bolt 7 from below toward the flange F1, the support bolt 7 is brought into contact with the lower surface of the flange F1, and the upward movement of the detaching device 3 is restricted. Moreover, the above-mentioned insertion piece 8 is made to contact | abut to the upper surface of the flange F1, and the downward movement of the removal | desorption apparatus 3 is controlled. That is, both sides of the flange F <b> 1 are narrowed by the support bolt 7 and the insertion piece 8.

  Next, the gap forming step will be described. After loosening the working bolts and nuts BN2 one by one by a predetermined pitch amount, the gap 25 is formed between the flanges F1 and F2. Specifically, as shown in FIGS. 6 and 7, by rotating each operation bolt 12, the inner diameter side end portion of the gap forming piece 9 is rotated upward. More specifically, the support rod 10 is used as a fulcrum, the outer diameter side end of the gap forming piece 9 is used as a force point, and the inner diameter side end of the gap forming piece 9 is applied as an action point according to the principle of the insulator, and the flange F2 faces upward. The air valve AV1 and the repair valve V1 are lifted upward, and a gap 25 is formed between the opposing surfaces of the flanges F1 and F2. When the gap 25 is formed, the sealing rubber 2e, 2f remains in contact with the inner wall 3e of the mounting member 5, so that a sealed state is secured.

  In addition, the packing P that has connected the seat Z1 of the flange F1 and the seat Z2 of the flange F2 in a watertight manner is lifted upward in a state of being attached to the flange F2 together with the repair valve V1 by forming the gap 25. However, some packing P may become packing waste P 'by adhering to the seat Z1 of the flange F1.

  Moreover, when performing this gap | interval formation process, the drain valve 19 is opened beforehand, and the air in the desorption apparatus 3 and the tap water which flows in into the desorption apparatus 3 from the gap | interval 25 are replaced. Then, on the condition that the tap water is discharged from the drain valve 19, the drain valve 19 is closed in a state where the tap water is filled in the desorption device 3.

  Further, when the drain valve 19 is closed, the repair valve V1 is directed upward by tap water, but the upward movement of the air valve AV1 and the repair valve V1 is a pitch at which the work bolt / nut BN2 is loosened. It is regulated by the amount.

  The sealing rubbers 2e and 2f fitted to the water stop plate 2 are raised while maintaining a sealed state between the flange F2 and the inner wall 3e. For example, between the flange F2 and the inner wall 3e. In order to seal the sealing member, it is not necessary to stick a waterproof sheet or the like to the maximum rising position of the flange F2 corresponding to the width of the gap 25 over the entire circumference of the inner wall 3e, and the manufacturing cost of the desorption device 3 can be reduced. Can do.

  Next, the valve body insertion process will be described. As shown in FIG. 8, the state in which the repair valve V1 is lifted by the gap forming piece 9 is maintained, and the communication portion B is sealed by the valve body 4 and the packing scrap P ′ is removed. Perform peeling. Specifically, first, the valve body 4 is inserted between the gaps 25 toward the sealing position by pushing the handle 16 in the left direction in the figure.

  At this time, the tip of the hooking part 17b of the peeling part 17 is caught by the packing scrap P 'adhering to the seat Z1 slightly raised from the flange F1. From the state in which the packing scrap P ′ is hooked on the hooking portion 17b, the handle 16 is further pushed in the left direction so that the valve body 4 rides on the seat Z1 of the flange F1, and the peeling portion 17 becomes the packing dust. P ′ is peeled off from the seat Z1 of the flange F1.

  As shown in FIG. 9, when the valve body 4 is disposed at the sealing position, the peeled portion 17 of the valve body 4 is disposed in the housing portion 20, so that the peeled packing scrap P ′ is contained in the housing portion 20. Is housed in. A part of the packing scrap P ′ may not be accommodated in the accommodating portion 20, and may be placed on the upper surface of the valve body 4 through the tapered portion 17 a after being peeled off.

  Next, the valve body pressing step will be described. As shown in FIG. 9, the valve body 4 arranged at the sealing position is viewed from above with the lower surface of the sealing recess 18 in contact with the seat Z1 of the flange F1. When the fixing bolt 24 is screwed in, the lower surface of the fixing bolt 24 comes into contact with the upper surface of the valve body 4 and presses the valve body 4 against the flange F1 and the seat Z1. Therefore, the valve body 4 is sealed at the communication portion B by the fixing bolt 24 and is fixed at the sealing position.

  Then, as shown in FIG. 10, as the attaching / detaching step, all the working bolts / nuts BN2 are removed from the flanges F1, F2, and the repair valve V1 is lifted upward while the sealing rubbers 2e, 2f are in sliding contact with the inner wall 3e. Then, the repair valve V1 is completely removed from the communication part B.

  As shown in FIG. 11, in order to attach the new air valve AV2 and the repair valve V2 to the communication part B, first, the repair valve V2 is closed, and a new packing P3 is pasted on the seat of the flange F5 of the repair valve V2. wear. And after inserting the flange F5 of the repair valve V2 with respect to the removal | desorption apparatus 3 with which the communication part B is sealed by the valve body 4 shown in FIG. 10, the water stop plate 2 and sealing rubber 2e, 2f are inserted in the flange F5. After inserting the working bolt / nut BN2 through the flanges F1 and F5, the bolt BL is tightened to a predetermined position.

  Further, after loosening the fixing bolt 24 and releasing the fixing at the sealing position, the handle 16 is pulled in the right direction so that the valve body 4 is disposed in the valve body storage portion 13 at the storage position. The operation bolt is screwed out to rotate the inner diameter side end of the gap forming piece 9 downward.

  Then, by tightening the work bolt / nut BN2, the seat of the flange F1 of the communication portion B and the seat of the flange F5 of the repair valve V2 are connected in a water-tight manner through the packing P3, and the drain valve 19 Is opened and the watertight state is confirmed, and then the connecting bolt / nut BN3 connecting the first divided portion 3a and the second divided portion 3a is removed, so that the detaching device 3 is separated from the first divided portion 3a and the second divided portion. It divides | segments into the part 3b, and removes from flange F1, F5.

  In order to attach the air valve AV2 to the repair valve V2, a gasket is attached to the seat of the flange F7 of the air valve AV2, and then the seat of the flange F7 of the repair valve V2 is placed on the seat of the flange F7 of the repair valve V2. The flanges F6 and F7 are tightened with bolts and nuts BN1 so that the seat of the flange F7 of the air valve AV2 is watertightly connected to the seat of the flange F6 of the repair valve V2.

  Finally, the working bolts and nuts BN2 connecting the flanges F1 and F5 are sequentially replaced with bolts and nuts BN1 one by one, and the water stop plate 2 is removed from the flange F5. Thus, as shown in FIG. 11, the attachment of the air valve AV2 and the repair valve V2 is completed. Therefore, the air valve AV2 can be used by operating the handle of the repair valve V2 to open the repair valve V2.

  As a modification of the present embodiment, as shown in FIG. 12, the detaching device 3 may be provided with a peeling member 26 as a peeling means separate from the valve body 4. Specifically, a peeling piece 26 b constituting the peeling member 26 is arranged in the housing portion 20, and an operation rod 26 a that can operate the peeling piece 26 b from the outside of the detaching device 3 is connected.

  The peeling piece 26b is formed at an acute angle with the tip facing downward. The operation rod 26 a is inserted into the accommodation space 21 through the communication hole 22 formed in the left end portion of the accommodation portion 23 and connected to the peeling piece 26 b, and the operation rod 26 a is operated from the outside of the detaching device 5. By doing so, the peeling piece 26b can be operated in the left-right direction. Since the communication hole 22 is formed to have a diameter slightly larger than the diameter of the operation rod 26a, when the peeling piece 26b is operated in the left-right direction, the peeling piece 26b is slightly inclined in the vertical direction and the front-back direction. It can be made to. Further, the communication hole 22 is provided with a packing to prevent water leakage from the communication hole 22.

  In order to peel off the packing scrap adhering to the flange F1, first, the peeling piece 26b of the peeling member 26 is inserted into the gap 25 formed between the flanges F1 and F2 by pushing the operating rod 26a. And move it above the flange F1. Then, by operating the operation rods 26a and 26a, the packing scrap P 'attached to the seat Z1 is peeled off by the peeling piece 26b disposed above the flange F1, and the peeled packing waste P' is accommodated in the housing portion. It is accommodated in 20 accommodation spaces.

  In order to completely peel off the packing scrap P ′ attached to the seat Z1, as shown in FIG. 13, the communication portion B is sealed by the valve body 4 with the packing scrap P ′ remaining on the seat Z1. After the repair valve V1 is removed, the window 28 formed by the translucent panel 28b and the window frame 28a made of translucent glass or an acrylic plate is used instead of the repair valve V1. To put on. By doing so, the seat Z1 can be confirmed from above via the translucent panel 28b, so that the packing scrap P 'can be reliably peeled off by the peeling piece 26b.

  As described above, in the desorption device 3 according to the present invention, the water stop plate 2 is provided on the flange F2 on the repair valve V1 side, and the sealing rubbers 2e and 2f for sealing the inner wall 3e are fitted in the circumferential direction. The water stop plate 2 has a divided structure that is divided into the number of bolts BL connecting the pair of flanges F1 and F2, and bolts through which the bolts BL are inserted into the divided plate pieces 2a. By forming the hole 2b, when the gap 25 is formed between the opposing surfaces of the flanges F1 and F2, the sealing rubbers 2e and 2f for sealing the inner wall 3e are connected to the inner wall 3e of the mounting member and the water blocking water. Between the rate 2, that is, between the newly installed members without using the existing flanges F <b> 1 and F <b> 2, they can contact each other in the circumferential direction and can be reliably sealed. In particular, the sealing rubber 2e, 2f is provided on the repair valve V1 side by providing the water stop plate 2 on which the sealing rubber 2e, 2f is fitted in the circumferential direction on the flange F2 on the repair valve V1 side. It is possible to reliably follow the movement of the flange F2.

  Further, the sealing rubber 2f is provided at a contact position where the outer surface of the sealing rubber 2e contacts both the flange F2 and the inner wall 3e on the repair valve V1 side, and the flange F2 and inner wall on the repair valve V1 side. Since any of 3e directly contacts and seals, no special sealing means is required between each plate piece 2a having the divided structure, and the fluid does not leak to the outside.

  Further, when the gap 25 is formed between the opposing surfaces of the pair of flanges F1 and F2, the peeling portion 17 that peels off the packing waste P ′ attached to the flange F1 on the communication portion B side is further configured. Even when the packing waste P ′ adheres to the flange F1 on the communication part B side when forming the gap 25, the communication part B can be securely connected by the valve body 4 by peeling the packing waste P ′ by the peeling part 17. Can be sealed.

  Further, when the gap 25 is formed between the opposing surfaces of the flange F1 in the gap forming step, the sealing rubbers 2e and 2f for sealing the gap between the flange F1 on the repair valve V1 side and the inner wall 3e are the inner wall of the mounting member 5. 3e and the water stop plate 2, that is, between the newly installed members without using the existing flanges F1 and F2, can contact each other in the circumferential direction and can be reliably sealed. In particular, the sealing rubber 2e, 2f is repaired in the gap forming step by providing the water stop plate 2 to which the sealing rubber 2e, 2f is fitted in the circumferential direction on the flange F2 on the repair valve V1 side. In addition to being able to reliably follow the movement of the flange F2 on the valve V1 side, the water stop plate 2 having a divided structure and formed with the bolt holes 2b in each of the bolts is replaced by a predetermined number of bolts BL. By inserting, the water stop plate 2 can be attached while maintaining the sealed state.

  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-described embodiment, the repair valve V1 to which the air valve AV1 is connected is connected to the communication part B, and the desorption device 3 is attached between the flange F1 of the communication part B and the flange F2 of the repair valve V1, and the air valve AV1 and the repair valve V1 have been removed. In order to remove the air valve AV1 directly connected to the communication part B, the desorption device 3 is attached between the flange F1 of the communication part B and the flange F4 of the air valve AV1. It may be.

  In the above embodiment, the sealing rubber 2e is fitted into the groove 2c of the water stop plate 2 and comes into contact with the inner wall 3e, and the sealing rubber 2f is fitted into the notch 2d and contacts the inner wall 3e and the flange F2. The sealing rubber is only required to be in contact with at least the inner wall 3e at the outer surface of the sealing rubber fitted to the water stop plate.

  In addition, the water stop plate 2 is divided into four fan-shaped plate pieces 2a. However, the number of divisions is the same as the number of bolts and nuts BN1 connecting the flanges F1 and F2. Also good.

It is a front view which shows the state in which the air valve and repair valve in the Example of this invention are attached to the existing fluid pipe | tube via a communication part. It is a front view which shows the state which attached the working volt | bolt nut and the water stop plate between the flanges. (A) is a top view which shows the attachment state to the flange of a water stop plate, (b) is a partially broken AA sectional drawing in Fig.3 (a). It is a partially broken front view which shows the state which attached the removal | desorption apparatus sealingly between the flange by the side of a communication part, and the flange by the side of a repair valve. It is a partially broken top view which shows the structure of a desorption apparatus. It is CC sectional drawing in FIG. It is a partially broken BB sectional view showing the state where the flange by the side of a communicating part and the flange by the side of a repair valve were separated. It is an expanded sectional view which shows the state by which a valve body is inserted in the clearance gap between the flange by the side of a communication part, and the flange by the side of a repair valve. It is an expanded sectional view showing the state where sealing of the communicating part by a valve element was completed. It is an expanded sectional view which shows the state which removed the air valve and the repair valve from the communication part. It is a front view which shows the state which attached the new air valve and the repair valve to the communication part. It is an expanded sectional view which shows the valve body as a modification. It is sectional drawing which shows the state in which the window part was attached to the attachment member.

Explanation of symbols

1 Existing fluid pipe 2 Water stop plate (plate member)
2a Plate piece 2b Bolt hole 2e, 2f Sealing rubber (sealing member)
Reference Signs List 3 Desorption device 3e Inner wall 4 Valve body 5 Mounting member 13 Valve body storage part 17 Peeling part
24 Fixing bolt (pressing part)
25 Gap 26 Peeling member (peeling means)
B Communication part V1, V2 Repair valve (pipe connecting member)
F1, F2 Flange BN1 Bolt / Nut BN2 Work Bolt / Nut P, P2 Packing P 'Packing waste

Claims (4)

Between the communicating part communicating with the existing fluid pipe and the pipe connecting member connected to the communicating part, a pair of flanges coupled with a predetermined number of bolts via packing is sealed in a sealed manner. A decoupling device for a pipe connecting member that seals the communicating portion between opposing faces and desorbs the pipe connecting member in an uninterrupted flow state,
A valve body that is inserted after forming a gap between the opposing surfaces of the pair of flanges and seals the communicating portion;
A valve body housing portion that houses the valve body so that the valve body can be operated from the outside, and a mounting member that is attached in a sealed manner so that a gap can be formed between the pair of flanges.
The mounting member includes a pressing portion that presses the valve body inserted into the gap against the flange on the communication portion side, and the pipe connecting member can be removed from the communication portion while the valve body is pressed by the pressing portion. An inner wall provided along the outer periphery of the flange on the connecting member side,
The flange on the tube connecting member side is provided with a plate member into which a sealing member is fitted in the circumferential direction, and the sealing member seals between the inner wall portion and the plate member, and the plate member Has a divided structure divided into the number of bolts connecting the pair of flanges, and a bolt hole through which the bolt is inserted is formed in each divided plate member. A desorption device for a pipe connecting member.   2. The pipe connection according to claim 1, wherein the sealing member is provided at an abutting position where an outer surface of the sealing member abuts on both the flange on the pipe connecting member side and the inner wall portion. Desorption device for members.   The peeling means for peeling packing dust adhering to the flange on the side of the communication portion when a gap is formed between the opposing surfaces of the pair of flanges is further configured according to claim 1 or 2. The desorption apparatus of the pipe connection member of description. Between the communicating part communicating with the existing fluid pipe and the pipe connecting member connected to the communicating part, a pair of flanges coupled with a predetermined number of bolts via packing is sealed in a sealed manner. A method of detaching a pipe connecting member that seals the communicating portion between opposing surfaces and detaches the pipe connecting member in an uninterrupted flow state,
A valve body that is inserted after forming a gap between the opposing surfaces of the pair of flanges and seals the communicating portion;
A valve body housing portion that houses the valve body so as to be operable from the outside, and an attachment member that is attached in a sealed manner so that a gap can be formed between the pair of flanges.
The mounting member includes a pressing portion that presses the valve body inserted into the gap against the flange on the communication portion side, and the pipe connecting member can be removed from the communication portion while the valve body is pressed by the pressing portion. An inner wall provided along the outer periphery of the flange on the connecting member side,
The flange on the tube connecting member side is provided with a plate member into which a sealing member is fitted in the circumferential direction, and the sealing member seals between the inner wall portion and the plate member, and the plate member Has a divided structure divided into the number of bolts connecting the pair of flanges, and each divided plate member is formed with a bolt hole through which the bolt is inserted,
The existing bolts connecting the pair of flanges are removed, and the bolts for connecting the pair of flanges are replaced one by one with the working bolts inserted through the bolt holes of the divided plate members, and the plate members A bolt replacement step for fitting the sealing member to
After the bolt exchanging step, the mounting member is attached to the pair of flanges in a sealed manner; and
After the mounting step, a gap forming step of loosening the bolt to form a gap between the opposing surfaces of the pair of flanges;
A valve body insertion step of inserting the valve body into the gap after the gap formation step;
After the valve body insertion step, a valve body pressing step of pressing the valve body against the flange on the communication portion side by the pressing portion;
A method for detaching a pipe connection member, comprising: a step of detaching the pipe connection member in a state where the valve body is pressed by the pressing portion after the valve body pressing step.

Images