JP5256061B2 - Desorption device for pipe connecting member - Google Patents

Description

  The present invention is inserted into the first insertion hole formed in the flange of the communication pipe communicating with the existing fluid pipe, and the second insertion hole formed in the flange of the pipe connection member connected to the communication pipe. The present invention relates to a detachment apparatus for a pipe connection member that removes existing bolts, separates opposed surfaces of a pair of flanges, inserts a valve body to seal a communication pipe, and detaches the pipe connection member in an uninterrupted state.

  Conventionally, when a pipe connection member such as an air valve or a repair valve connected to a communication pipe of an existing fluid pipe via a flange or the like is detached from the existing fluid pipe for replacement or maintenance, the existing fluid pipe In order to remove the pipe connecting member while maintaining the uninterrupted flow state, the connecting pipe and the pipe connecting member are water-tightly covered by the pipe connecting member detaching device provided with the valve body, and the valve body is provided between the connecting pipe and the pipe connecting member. Is inserted to stop water on the communication pipe, and the existing pipe connection member can be removed and replaced with a new pipe connection member.

  This type of communication pipe and pipe connection member are connected by bolts and nuts inserted into the insertion hole formed in the flange of the communication pipe and the insertion hole formed in the flange of the pipe connection member. In order to prevent water leakage from the insertion hole of the communication pipe and the insertion hole of the pipe connection member in the replacement of the member, before inserting the valve body between the communication pipe and the pipe connection member, The collar part can be replaced by replacing it with a working bolt and nut having an annular packing for sealing and a washer composed of a metal washer covering the outer surface of the packing, and a nut containing the packing in the collar part. And the nut abuts against the flange of the communication pipe and the flange of the pipe connection member, respectively, and prevents water leakage from the insertion hole of the communication pipe and the insertion hole of the pipe connection member (see, for example, Patent Document 1). .

JP 2008-51231 A (6th page, FIG. 16)

  However, in the apparatus for attaching and detaching a pipe connecting member described in Patent Document 1, when water is shut off to the communication pipe by the valve body, the opposing surfaces of the pair of flanges are separated while loosening the work bolts and nuts. By loosening the work bolts and nuts to insert the valve body, the flange and nut are separated from the flange of the communication pipe and the flange of the pipe connection member, respectively. There is a risk of water leakage from the hole or the insertion hole of the pipe connecting member.

  The present invention has been made paying attention to such a problem. When the pair of flanges are separated from each other, the insertion hole formed in the flange of the communication pipe and the insertion hole formed in the flange of the pipe connection member are provided. An object of the present invention is to provide a pipe connecting member detaching apparatus that reliably prevents leakage.

In order to solve the above-described problem, a pipe connecting member detaching device according to claim 1 of the present invention is provided.
Existing bolt inserted into the first insertion hole formed in the flange of the communication pipe communicating with the existing fluid pipe, and the second insertion hole formed in the flange of the pipe connection member connected to the communication pipe A pipe connecting member detaching apparatus that separates the opposing surfaces of the pair of flanges and inserts a valve body to seal the communication pipe, and detaches the pipe connecting member in an uninterrupted flow state,
A mounting member that is sealed and capable of forming a gap between the opposing surfaces of the pair of flanges, and that accommodates the valve body therein;
In place of the existing bolt, it has at least a leakage preventing member that seals both the insertion holes,
The leakage preventing member includes a first sealing member that seals the first insertion hole, a second sealing member that seals the second insertion hole, and the both sealing members and the both insertion holes. And at least a bolt and a nut to be attached, and an elastic member having elasticity,
By separating the pair of flanges, due to the elastic return force of the elastic member clamped between one flange and the head of the bolt or the nut,
The first sealing member is clamped between the flange of the communication pipe and the head or nut side of the bolt to seal the first insertion hole, and the second sealing member is a pipe connecting member. The second insertion hole is sealed by being clamped between the flange of the bolt and the head or nut side of the bolt.
According to this feature, by simply separating the pair of flanges, an elastic return force is generated in the elastic member sandwiched between one flange and the head or nut of the bolt, and this elastic return force is utilized. The first sealing member is clamped between the flange of the communication pipe and the head of the bolt or the nut side to seal the first insertion hole, and the second sealing member is connected to the pipe connection member. An insertion hole and a pipe connection member formed in the flange of the communication pipe when the pair of flanges are separated to be sealed between the flange and the bolt head or the nut side to seal the second insertion hole It is possible to reliably prevent leakage of the insertion hole formed in the flange. Further, the elastic restoring force of the elastic member acts on each of the sealing members with the same force acting / reacting in a direction substantially coaxial with the bolt inserted through the elastic member.

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 bolt and nut are screwed together in a state having play so that the pair of flanges can be separated without screwing out the bolt and nut.
According to this feature, when the pair of flanges are separated from each other, the pair of flanges are separated by maintaining the sealed state of both insertion holes by the elastic member without operating the bolts and nuts. Can be made easier.

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,
A seal member is interposed between an outer peripheral surface of a neck lower portion of the bolt and an inner peripheral surface of at least one of the sealing members through which the bolt is inserted.
According to this feature, the seal member can prevent leakage from between the outer peripheral surface of the lower neck portion of the bolt and the inner peripheral surface of the sealing member.

A desorption device for a pipe connection member according to claim 4 of the present invention is the desorption device for a pipe connection member according to any one of claims 1 to 3,
A seal ring is interposed between the bolt head side or nut side and at least one of the sealing members.
According to this feature, the seal ring can prevent leakage from between the head side or the nut side of the bolt and the sealing member.

A desorption device for a pipe connection member according to claim 5 of the present invention is the desorption device for a pipe connection member according to any one of claims 1 to 4,
Either one of the sealing members has a short neck lower portion in which a gap is formed on the opposing surface side of the pair of flanges in the insertion hole sealed by the sealing member, and the other sealing member is the sealing member It is characterized by having a long neck lower portion that is inserted through the insertion hole that seals the member and is further inserted through the gap.
According to this feature, either one of the sealing members has a short neck lower portion in which a gap is formed in the insertion hole, and the other sealing member is inserted in the insertion hole and further into the gap. When the pair of flanges are separated from each other, the pair of flanges can be guided by the long neck lower part and the pair of flanges can be prevented from being displaced.

It is a front view which shows the state by which the air valve and flange short pipe as a pipe connection member concerning this invention were attached to the communicating pipe. It is a front view which shows the state in which the attachment member was attached to the flange. (A) is a top view of an attachment member, (b) is a bottom view similarly. (A) is a top view of the attachment member to which the moving member was attached, (b) is a bottom view similarly, (c) is AA sectional drawing of (a). (A) is a front view of one moving member, (b) is a bottom view, and (c) is a cross-sectional view taken along the line CC in (a). (A) is a front view of the other moving member, (b) is also a bottom view, and (c) is a DD cross-sectional view of (a). FIG. 5 is a cross-sectional view taken along the line BB in FIG. (A) is a front view of a leakage preventing member, and (b) is a sectional view of the same. (A) is XX sectional drawing of FIG. 2, (b) is YY sectional drawing of FIG. FIG. 3 is a partial cross-sectional view of FIG. 2. It is EE sectional drawing of Fig.9 (a). (A) is FF sectional drawing of Fig.9 (a) which shows the state with which the leakage prevention member was attached to the penetration hole, (b) is the state which the flanges separated from the state of (a). It is sectional drawing shown. It is a partial cross section figure which shows the state by which the valve body was inserted between the opposing surfaces of a flange. It is a partial cross section figure which shows the state in which the closure apparatus was attached. It is sectional drawing which shows the state from which the flange short tube, the storage case, and the attachment member were removed. It is sectional drawing which shows the state in which the repair valve and the storage case were attached to the communicating pipe. It is a front view which shows the state in which the air valve was newly attached.

  The form for implementing attachment / detachment using the attachment / detachment device for a pipe connecting member according to the present invention will be described below based on examples.

  A pipe connecting member detaching apparatus according to Embodiment 1 will be described with reference to FIGS. In the following, the top, bottom, left, and right sides of FIG. 1 are the top, bottom, left, and right sides of the pipe connecting member detaching apparatus, the front side of the paper is the front side (front side) of the pipe connecting member detaching apparatus, The side (back side) will be described.

  As shown in FIG. 1, the longitudinal direction of the existing fluid pipe P is used to discharge the air in the pipe of the existing fluid pipe P as a water transport pipe to the outside of the pipe or to prevent negative pressure in the pipe. Is provided with an air valve AV1 as a pipe connection member, and the air valve AV1 includes a communication pipe B provided in the existing fluid pipe P and a flange as a pipe connection member connected to the communication pipe B. It is attached via a short pipe FP. In addition, the connection between the communication pipe B and the flange short pipe FP is formed in a plurality of first insertion holes Fa formed in the flange F1 provided in the communication pipe B and a flange F2 provided in the flange short pipe FP. Further, the existing bolts 18 are respectively inserted integrally into the second insertion holes Fb, and are connected by fastening the existing bolts 18 and the nuts 19.

  Further, a repair valve V as a pipe connecting member for opening and closing the flow from the communication pipe B at the time of repair and adjustment of the air valve AV1 is attached to the flange F1 of the communication pipe B of the existing fluid pipe P. The air valve AV2 may be attached to the upper end via a flange (see FIG. 17). As shown in FIG. 1, it is necessary to replace the air valve AV1 that is not provided with the repair valve V, or the air valve AV1 that is provided with the repair valve V but has the water stoppage failure due to failure or the like. When this occurs, the apparatus for attaching / detaching the pipe connecting member is attached to the flange F1 of the communication pipe B and the flange F2 of the short flange pipe FP, and the short pipe FP and the air valve AV1 are attached / detached (see FIGS. 2 and 14). .

  As shown in FIGS. 1, 4 (a) to (c), FIG. 12, and FIG. 14, the detaching apparatus is mainly replaced with a mounting member 3 that accommodates the valve body 2 a and an existing bolt 18. The blocking device 11 includes a leakage preventing member 20 that seals the first insertion hole Fa and the second insertion hole Fb, and a blocking member 13 that closes the communication tube B by being disposed in the communication tube B described later. ,have.

  As shown in FIGS. 2, 3 (a), 3 (b), and 4 (c), the attachment member 3 includes a valve body 2 a, a valve housing portion 2 for housing the valve body 2 a, Relative movement with respect to the flange accommodating part 5 of the two-part structure in which the dividing part is connected to the valve accommodating part 2, the valve accommodating part 2 and the flange accommodating part 5, and relative movement with respect to the flange F2 of the flange short pipe FP And a pipe connection member support portion 6 that is supported by being restricted, and the flange housing portion 5 sandwiches the flange F1 and the flange F2 in the circumferential direction and is connected by mounting bolts and nuts 4 to be installed. (See FIGS. 9A and 9B).

  The valve accommodating portion 2 mainly includes a rectangular portion 2e that accommodates the valve body 2a. The valve body 2a is operated by pushing and pulling the valve shaft 2c so as to stop water at the facing surface S of the flange F1 of the communication pipe B. It is possible to advance and retreat (see FIG. 13).

  The flange accommodating portion 5 is connected to the rectangular portion 2e, and an arc-shaped portion 24 having an inner diameter slightly larger than the outer diameter of the flange F1 and a circle having an inner diameter slightly larger than the outer diameter of the flange F1 like the arc-shaped portion 24. The arc-shaped portions 23 and 24 are provided with hooking portions 23b and 24b provided with bolt holes through which the mounting bolts and nuts 4 are inserted.

  As shown in FIG. 3A, FIG. 4C, and FIG. 7, the moving members 27 and 28 of the tube connecting member support portion 6 described later are fitted on the upper surfaces of the arc-shaped portions 23 and 24, respectively. The fitting grooves 23g and 24g are formed over the circumferential direction, and sealing members 41 and 42 are disposed on the inner peripheral surfaces of the fitting grooves 23g and 24g. These sealing members 41 and 42 are interposed between the flange housing portion 5 and the pipe connection member support portion 6 so that the arc-shaped portions 23 and 24 and the pipe connection member support portion 6 can move relative to each other as will be described later. Regardless, the space between the flange housing portion 5 and the pipe connection member support portion 6 is sealed (see FIG. 10).

  A plurality of bulging portions 23 a and 24 a as restricting portions that bulge toward the inner diameter direction of the flange housing portion 5 are formed in the center portion of the inner wall surfaces of the arc-shaped portions 23 and 24 along the circumferential direction. The bulging portions 23a and 24a have a relatively thin wall thickness that can be disposed in a gap formed between the opposing surfaces S and T on the outer peripheral side of the connected flanges F1 and F2. The lower surfaces of 23a and 24a come into contact with the upper surface of the flange F1 formed in the outer diameter direction of the opposing surface S, and the valve housing portion 2 and the flange housing portion 5 are attached to the flange F1 (see FIG. 10).

  The arc-shaped portions 23, 24 are formed with lower flange portions 23f, 24f extending from the lower ends thereof toward the arc-shaped portions 24, 23, and the lower flange portions 23f, 24f have bolts. 26 are respectively screwed together. After the valve housing portion 2 and the flange housing portion 5 are attached to the flange F1 by the mounting bolts and nuts 4, the bolts 26 are screwed into the respective flanges F1, so that the bolts 26 and the aforementioned bulges are formed. The portions 23a and 24a sandwich the flange F1 in the vertical direction, that is, in the axial direction of the communication pipe B. That is, the flange accommodating portion 5 and the valve accommodating portion 2 are supported by being relatively moved with respect to the flange F1 of the communication pipe B, and the valve accommodating portion 2 and the flange accommodating portion 5 are supported by the communication pipe of the present invention. (See FIG. 10).

  Under the inner wall portions of the arc-shaped portions 23, 24, there are water-stop members 23d, 24d as first seal members made of an elastic material fitted in respective fitting grooves formed over the inner wall portions. Arranged. The water stop members 23d and 24d are interposed between the pipe connection member support portion 6 and the flange F1 of the communication pipe B to prevent leakage from between the arcuate portions 23 and 24 and the flange F1 of the communication pipe B. This is to be prevented (see FIG. 10).

  As shown in FIG. 2 and FIGS. 4A and 4C, the pipe connection member support portion 6 is a four-part structure disposed along the circumferential direction, and is connected to the moving members 27 and 28. A plurality of bolts 29 as a portion and a fixing member 30 for fixing the bolt 29 to the arc-shaped portions 23 and 24 by the plurality of bolts 40 are configured. In this embodiment, in FIG. 4A, the upper left moving member and the lower left moving member have a line-symmetric structure with respect to the line AA in the figure, and therefore the upper left movement in the figure. The member and the moving member on the lower left side will be described as the moving member 27 with the same reference numerals. Similarly, since the upper right moving member and the lower right moving member have a line symmetrical structure with respect to the line AA in the drawing, the same reference numerals are used for the upper right moving member and the lower right moving member. It attaches and demonstrates as the moving member 28. FIG.

  As shown in FIGS. 5A to 5C, FIGS. 6A to 6C, FIG. 7 and FIG. 11, the moving members 27 and 28 are U-shaped in cross-section and move. The outer peripheral side portions 27b, 28b of the members 27, 28 are fitted into the fitting grooves 23g, 24g of the arc-shaped portions 23, 24 with their inner peripheral surfaces abutting against the sealing members 41, 42 described above.

  In addition, water stop members 27d and 28d as second seal members made of an elastic material are disposed on the inner wall portions of the moving members 27 and 28 over the inner wall portions. That is, the water stop members 27d and 28d are interposed between the moving members 27 and 28 and the flange F2 of the flange short pipe FP, and leak from between the moving members 27 and 28 and the flange F2 of the flange short pipe FP. Is to prevent.

  Furthermore, bulging portions 27a and 28a as moving portions that bulge toward the inner diameter direction of the pipe connecting member support portion 6 are formed at the distal end portions of the inner wall portions of the moving members 27 and 28. The arrangement positions of the portions 27a and 28a are different from the arrangement positions of the bulging portions 23a and 24a of the arc-shaped portions 23 and 24 described above along the circumferential direction (see FIG. 4B).

  Further, the bulging portions 27a and 28a have a relatively thin wall thickness that can be disposed in a gap formed between the opposing surfaces S and T on the outer peripheral side of the connected flanges F1 and F2. The upper surfaces of the protruding portions 27a and 28a are in contact with the lower surface of the flange F2 formed in the outer diameter direction of the opposing surface T, so that the pipe connecting member support portion 6 is attached to the flange F2 (see FIG. 11). ).

  Further, bolts 25 are screwed onto the upper surfaces of the moving members 27 and 28, respectively. After the flange accommodating portion 5 is attached to the flange F1 by the attaching bolt / nut 4, the bolt 25 is screwed into the respective flanges F2, so that the bolt 25 and the bulging portions 27a and 28a described above are formed. The flange F2 is clamped in the vertical direction, that is, in the axial direction of the communication pipe B. By this clamping, the relative movement of the pipe connecting member support 6 with respect to the flange F2 of the flange short pipe FP is restricted.

  As shown in FIGS. 7 and 11, the bolt 29 includes a head portion 29a as an operation portion disposed on the communication pipe B side, and a screw portion 29b extending from the head portion 29a. Screwed into the bolt holes 27c and 28c (see FIGS. 5C and 6C) of the side portions 27b and 28b, and the head portion 29a of the bolt 29 penetrates the fixing member 30 and the arc-shaped portions 23 and 24. In this state, the fixing member 30 is attached to the upper surfaces of the arc-shaped portions 23 and 24 by the plurality of bolts 40, so that the relative movement of the bolt 29 with the arc-shaped portions 23 and 24 is restricted.

  In this way, the relative movement of the bolt 29 with the arcuate portions 23 and 24 is restricted. Therefore, by rotating the head portion 29a on the communication tube B side, the moving members 27 and 28 screwed to the screw portion 29b are moved. The formed bulging portions 27a and 28a support the flange F2 of the flange short pipe FP, and the flange short pipe FP can move up and down in the pipe axis direction of the communication pipe B. That is, the moving members 27 and 28 are connected to the bolt 29 so as to be relatively movable.

  As shown in FIGS. 8A and 8B and FIGS. 12A and 12B, the leakage preventing member 20 includes a first sealing member 32 that seals the first insertion hole Fa, and a second sealing member. A second sealing member 34 that seals the insertion hole Fb, a bolt 36 and a nut 35 that are attached by being inserted through the sealing members 32 and 34 and the insertion holes Fa and Fb, an elastic member 37 having elasticity, and a nut. And a seal ring 38 interposed between the side 35 and the second sealing member.

  The bolt 36 is inserted through both the sealing members 32 and 34 and the elastic member 37 and through both the insertion holes Fa and Fb, and the neck lower portion 36b formed at the tip of the bolt 36 includes: A nut 35 is screwed together.

  The second sealing member 34 protrudes in the axial direction of the bulging portion 34a bulging in the radial direction and the second insertion hole Fb, and has a neck shorter than the neck lower portion 32b of the first sealing member 32 described later. The lower part 34b and the waterproof ring 34c provided in the circumferential direction under the bulging part 34a are formed. The neck lower part 34b is inserted into the second insertion hole Fb, and the waterproof ring 34c is flanged. The second sealing member 34 is brought into contact with the upper surface of F2 in a watertight manner, and the second sealing member 34 is fitted into the second insertion hole Fb, thereby preventing leakage from the second insertion hole Fb.

  Further, the vertical dimension of the second sealing member 34 shown in the drawing is such that the tip of the neck lower portion 34b of the second sealing member 34 is the second in the state where the second sealing member 34 is fitted in the second insertion hole Fb. The dimension is located at a position slightly higher than the substantially central height position of the insertion hole Fb. That is, in the state where the second sealing member 34 is fitted in the second insertion hole Fb, a gap K is formed in the lower portion in the second insertion hole Fb.

  The first sealing member 32 includes a bulging portion 32a bulging in the radial direction and a neck lower portion 32b that protrudes in the axial direction of the first insertion hole Fa and is longer than the neck lower portion 34b of the second sealing member 34. A waterproof ring 32c provided in the circumferential direction on the bulging portion 32a, and a seal member 32e interposed in an inner peripheral surface 32d that forms an insertion hole through which the bolt 36 is inserted. 32b is inserted into the first insertion hole Fa, and the tip of the neck lower part 32b passes through the first insertion hole Fa, and faces the second insertion holes Fb from the opposing surfaces S, T of the flanges F1, F2. While being inserted through the gap K, the waterproof ring 32c is in watertight contact with the lower surface of the flange F1 and fitted into the first insertion hole Fa without any gap, thereby preventing leakage from the first insertion hole Fa. It has become so. The first sealing member 32 is dimensioned so that the tip of the neck lower portion 32b is positioned at a substantially central height position of the second insertion hole Fb in a state where the first sealing member 32 is fitted in the first insertion hole Fa. .

  The elastic member 37 is made of a metal coil spring, and is disposed between the first sealing member 32 and the head portion 36a of the bolt 36. The seal ring 38 is a packing 38b formed in an annular shape with a flexible material. And a metal washer 38a covering the outer periphery and one plane of the packing 38b.

  Next, the desorption process which performs desorption of a pipe connection member by a continuous flow using a desorption apparatus is demonstrated.

  First, as shown in FIG. 1, the flange F1 of the communication pipe B and the flange F2 of the short flange pipe FP connected by the existing bolt 18 and the nut 19 are cleaned, and the state of the flange F1 and the flange F2 is confirmed. . If there are irregularities or the like that adversely affect water stoppage due to packing or the like, repair is performed, and then the existing bolts 18 and nuts 19 are replaced one by one with temporary bolts and nuts for work not shown. After the replacement, the mounting member 3 is attached to the flanges F1 and F2 from the circumferential direction as shown in FIG.

  In order to attach the attachment member 3 to the pair of flanges F1 and F2, first, the bulging portions 23a and 24a of the arc-shaped portions 23 and 24 and the bulging portions 27a and 28a of the pipe connection member support portion 6 are connected to the flange F1. , F2 so as to be inserted into the gap formed between the opposing surfaces S, T on the outer peripheral side (see FIGS. 10 and 11), the mounting member 3 is disposed, and the hooking portions 23b of the arc-shaped portions 23, 24, The bolts 24a are tightened with mounting bolts and nuts 4 (see FIG. 9A). By this tightening, the water stop members 23d, 24d and the outer peripheral surface of the flange F1 come into contact with each other, and the water stop members 27d, 28d and the outer peripheral surface of the flange F2 come into contact with each other.

  Then, the bolt 26 is screwed so as to contact the lower surface of the flange F1, and the bolt 25 is screwed so as to contact the upper surface of the flange F2. That is, the bolt 26 provided in the flange accommodating portion 5 of the mounting member 3 and the bulging portions 23a and 24a sandwich the flange F1, so that the flange accommodating portion 5 and the valve accommodating portion 2 and the flange F1 are relative to each other. The movement is restricted, and the bolt 25 provided on the moving members 27 and 28 and the bulging portions 27a and 28a sandwich the flange F2, so that the relative movement between the moving members 27 and 28 and the flange F2 is restricted. (See FIGS. 10 and 11).

  Next, in order to attach the leakage preventing member 20 to both the insertion holes Fa and Fb, the temporary bolts and nuts for work described above attached to the both insertion holes Fa and Fb are removed. Next, as shown in FIG. 12A, the bolt 36 in which the elastic member 37 and the first sealing member 32 are inserted into the neck lower portion 36b is connected to the first insertion hole Fa and the first insertion from the lower surface side of the flange F1. The neck portion 32b of the first sealing member 32 is inserted through the first insertion hole Fa and further through the gap K of the second insertion hole Fb.

  Next, from the upper surface side of the flange F2, the second sealing member 34 is passed through the neck lower portion 36b of the bolt 36 and fitted into the second insertion hole Fb, and then the seal ring 38 provided with the packing 38b is provided. It penetrates the lower neck portion 36b.

  One end side of the elastic member 37 is in contact with the head 36a of the bolt 36, the other end side of the elastic member 37 is in contact with the bulging portion 32a of the first sealing member 32, and the packing 38b of the seal ring 38 is the second side. The nut 35 is screwed into the neck lower portion 36 b of the bolt 36 so that the bulging portion 34 a of the sealing member 34 abuts and the nut 35 abuts the washer 38 a of the seal ring 38. In the state of FIG. 12A, the bolt 36 and the nut 35 are screwed together with play so that the pair of flanges F1, F2 can be separated without operating the bolt 36 and the nut 35.

  The above-described temporary bolts and nuts for work and the leakage preventing member 20 are exchanged for all the predetermined numbers. In addition, you may make it replace the existing bolt 18 and the nut 19, and the leak prevention member 20 directly, without using the temporary bolt and nut for work.

  Next, a gap is formed so that the valve body 2a can be inserted between the opposing surfaces S, T of the pair of flanges F1, F2. This gap forming step will be described below.

  Next, as shown in FIG. 12B, the moving members 27 and 28 (see FIG. 11) of the pipe connecting member support portion 6 are rotated by rotating the heads 29a of the respective bolts 29 on the communication pipe B side. The opposing surface T of the flange F2 is supported, and the reaction force from the flange F2 is applied to the flange F1 by the bulging portions 23a and 24a via the bolts 29, so that the flange F2 moves upward in the figure. By the movement of the flange F2, the flange F2 is guided by the long neck lower part 32b, and a gap in which a valve body 2a described later can be inserted is formed between the opposing surfaces S and T of the flanges F1 and F2. That is, the relative movement between the flange housing portion 5 and the valve housing portion 2 and the communication pipe B is restricted, and the relative movement between the moving members 27 and 28 and the flange F2 of the flange short pipe FP is restricted, and a pair of The flanges F1 and F2 are separated.

  Due to the movement of the moving members 27 and 28, the second sealing member 34, the seal ring 38, the nut 35, and the bolt 36 screwed to the nut 35 also move upward together with the flange F2. The first sealing member 32 is contracted by the head 36a of the bolt 36 and the first sealing member 32 and contracts, and the first sealing member 32 uses the flange F1 and the elastic member 37 by utilizing the elastic restoring force acting by the contraction of the elastic member 37. The first insertion hole Fa is sealed when the waterproof ring 32c is pressed against the lower surface of the flange F1.

  On the other hand, the elastic member 37 presses the head portion 36a of the bolt 36 downward by the elastic restoring force of the elastic member 37, so that the nut 35 directs the seal ring 38 and the second sealing member 34 toward the upper surface of the flange F2. And press. In other words, the second sealing member 34 is pressed between the flange F2 and the seal ring 38, and the waterproof ring 34c is pressed against the flange F2, so that the second insertion hole Fb is sealed.

  In this way, by simply separating the pair of flanges F1 and F2 by operating the head portion 29a of the bolt 29, an elastic restoring force is applied to the elastic member 37 sandwiched between the flange F1 and the head portion 36a of the bolt 36. Using this elastic return force, the first sealing member 32 is clamped between the flange F1 of the communication pipe B and the head 36a side of the bolt 36 to seal the first insertion hole Fa. At the same time, the second sealing member 34 is clamped between the flange F2 and the nut 35 side to seal the second insertion hole Fb. Leakage from the holes Fa and Fb can be reliably prevented. Further, the elastic restoring force of the elastic member 37 acts on each of the sealing members 32 and 34 with the same force acting / reacting in a direction substantially coaxial with the bolt 36 inserted through the elastic member 37.

  Further, when the pair of flanges F1 and F2 are separated from each other, the pair of flanges F1 and F2 are separated by maintaining the sealing state of the insertion holes Fa and Fb by the elastic member 37 without operating the bolt 36 and the nut 35. Therefore, the separation work of F1 and F2 of the pair of flanges can be facilitated.

  Further, due to the elastic restoring force of the elastic member 37, the nut 35 presses the seal ring 38 downward, and the packing 38 b of the seal ring 38 comes into close contact with the bulging portion 34 a of the second sealing member 34. Thus, leakage from between the nut 35 side and the second sealing member 34 can be prevented.

  Further, as described above, since the sealing member 32e is interposed between the outer peripheral surface of the neck lower portion 36b of the bolt 36 and the inner peripheral surface 32d of the first sealing member 32 through which the bolt 36 passes, The seal member 32e can prevent leakage from between the head 36a side of the bolt 36 and the first sealing member 32.

  Further, as described above, the second sealing member 34 has a short neck lower portion 34b in which a gap K is formed in the second insertion hole Fb to be fitted, and the first sealing member 32 is fitted. When the pair of flanges F1 and F2 are separated from each other, the pair of flanges F1 and F2 are long in length by having a long neck lower portion 32b that passes through the first insertion hole Fa and is inserted through the gap K. It is possible to prevent the pair of flanges F1, F2 from being displaced.

  Next, as shown in FIG. 13, the valve shaft 2c is pushed into the gap between the flanges F1 and F2 to move the valve body 2a toward the center of the flange and insert it to a predetermined position where the communication pipe B is closed. In the state of FIG. 13, there is a slight gap between the valve body 2a and the facing surface S (see the single-point enclosed portion W in the figure). Next, the flange short pipe FP and the air valve AV1 connect the valve body 2a to the flange F1. The opposed surface S is pressed to stop the water without the gap. After the water is stopped, the air valve AV1 is removed, and the closing device 11 is attached to the upper flange of the flange short pipe FP.

  The closing device 11 will be described. As shown in FIG. 14, the closing device 11 includes a housing case 12 attached to the flange F <b> 1 of the communication pipe B, a housing case 12, and a branch port BE of the communication pipe B. It is comprised from the closure member 13 which closes (refer FIG. 15).

  The housing case 12 has a flange that can be water-tightly connected to the flange of the flange short pipe FP at one end, and the closing member 13 is housed inside.

  The closing member 13 passes through the center of the cylindrical elastic body 13a, and a spindle 14 that expands and contracts the engaging body 13d at the tip end in the radial direction by rotation of the handle 17 attached to the top end, and a handle 17 ′ at the top end. A screw 15 is screwed below, a sleeve 15 having a support 13b of an elastic body 13a below it, a screw 17 fitted to the screw of this sleeve 15, a handle 17 '' at its upper end, and an elastic body at its lower end. It is comprised with the pipe 16 provided with the press body 13c which can press 13a upper part.

  The handles 17, 17 ′, 17 ″ are detachably attached to the spindle 14, the sleeve 15 and the pipe 16, and the spindle 14, the sleeve 15 and the pipe 16 are attached to the housing case 12 in a watertight manner. ing.

  Then, from the state shown in FIG. 14, the valve shaft 2c is retracted from the gap between the flange F1 and the flange F2 to move the valve body 2a into the rectangular portion 2e to open the communication pipe B, and the handle 17 ′ of the sleeve 15 is moved. Then, the closing member 13 is sent to a predetermined position on the inner surface of the communication pipe B, the handle 17 of the spindle 14 is rotated, and the engaging body 13d at the tip of the spindle 14 is extended in the radial direction so that the branch port BE (see FIG. 15) The inner peripheral surface of the existing fluid pipe P is locked. In this state, the handle 17 'of the sleeve 15 is pressed and fixed, and the handle 17' 'of the pipe 16 is rotated to move the support 13b holding the elastic body 13a and the pressing body 13c relative to each other. The elastic body 13a is pressed and deformed to expand in the radial direction, and the inside of the branch port BE (see FIG. 15) is shielded to be in a water stop state.

  Next, as shown in FIG. 15, the handles 17, 17 ′, 17 ″ are removed from the spindle 14, the sleeve 15 and the pipe 16, respectively, and a stopper (not shown) for fixing the pipe 16 is provided at the upper end of the sleeve 15. And the expanded state of the elastic body 13a is maintained. In this state, the flange short pipe FP, the housing case 12, and the attachment member 3 are removed.

  Thereafter, as shown in FIG. 16, the new repair valve V and the housing case 12 are inserted into the spindle 14, the sleeve 15 and the pipe 16, and the repair valve V is watertight with the existing bolt 18 and the nut 19 in the flange F 1 of the communication pipe B. The storage case 12 is installed on the upper side of the repair valve V.

  Since the repair valve V can be attached after the opposing surface S of the flange F1 of the communication pipe B is inspected, cleaned, and repaired, it is possible to reliably ensure water stopping performance.

  When the repair valve V and the housing case 12 are attached, handles 17, 17 ', 17' 'are attached to the spindle 14, sleeve 15, and pipe 16, and the handle 17' of the pipe 16 is supported while the handle 17 'of the sleeve 15 is supported. Is operated to reduce the elastic body 13a, and the spindle 14 is operated to reduce the engaging body 13d so that the engagement with the inner peripheral surface of the existing fluid pipe P of the branch port BE is released, and the closing member 13 is accommodated. Pull up to the inside of the case 12.

  Then, as shown in FIG. 17, after the repair valve V is closed and the storage case 12 is removed, the air valve AV2 is attached to the upper side of the repair valve V, and the repair valve V is opened. V can be installed below the air valve AV2. In this case, not only can the air valve AV2 be converted to a new one, but also the air valve AV1 can be inspected and maintained and reattached.

  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.

  In the above-described embodiment, the existing fluid pipe P is configured as a water supply transport pipe in which the fluid flowing therein is clean water, but the fluid is not necessarily limited to clean water, and may be industrial water, for example. Also, it can be applied to a fluid pipe through which a fluid in a gas or gas-liquid mixed state flows.

  Moreover, in the said Example, while the 1st sealing member 32 is pinched between the flange F1 of the communicating pipe B, and the head 36a side of the volt | bolt 36, while sealing the 1st penetration hole Fa, 2nd Is sealed between the flange F2 of the flange short pipe FP and the nut 35 side to seal the second insertion hole Fb. For example, the arrangement position of the bolt and nut is changed. The first sealing member is clamped between the flange of the communication tube and the nut to seal the first insertion hole, and the second sealing member is connected to the flange of the flange short tube and the head side of the bolt. And the second insertion hole may be sealed.

  Further, in the embodiment, the seal member 32e is interposed between the outer peripheral surface of the neck lower portion 36b of the bolt 36 and the inner peripheral surface 32d of the first sealing member 32 through which the bolt 36 is inserted. The sealing member may be interposed between the outer peripheral surface of the lower neck portion of the bolt and the inner peripheral surface of the second sealing member through which the bolt is inserted. Moreover, between the outer peripheral surface of the neck lower part of the bolt and the inner peripheral surface of the first sealing member through which the bolt is inserted, and the outer peripheral surface of the neck lower part of the bolt and the inner peripheral surface of the second sealing member through which the bolt is inserted A sealing member may be interposed between the two.

  In the embodiment, the seal ring 38 is interposed between the nut 35 side and the second sealing member 34. For example, in the embodiment, the elastic ring 38 is located on the head 36a side of the bolt 36. A seal ring interposed between the member 37 and the first sealing member 32 may be used. Alternatively, the seal ring may be interposed between the elastic member 37 and the first sealing member 32 and between the nut 35 and the second sealing member 34, respectively.

  Moreover, in the said Example, although the 1st sealing member 32 has the elongate neck lower part 32b which penetrates the 1st penetration hole Fa and is further inserted through the space | gap K, for example, the 1st sealing member The member has a short neck lower portion in which a gap is formed on the opposing surface side of the pair of flanges in the first insertion hole, and the second sealing member passes through the second insertion hole and covers the gap. It may have a long neck part to be inserted.

  Moreover, in the said Example, by the rotation operation of the head 29a of the volt | bolt 29, the bulging parts 27a and 28a of the moving members 27 and 28 support and move the opposing surface T of the flange short pipe FP, and thereby a pair of Although the flanges F1 and F2 are separated from each other, the configuration for separating the pair of flanges F1 and F2 is not limited to this. For example, the attachment member has a tapered surface on the outer peripheral side of the flange of the flange short pipe. A wedge member disposed in contact with the opposing surface; and a screw member that moves the wedge body. The wedge member is moved by rotating the screw member, so that the pipe connecting member is moved by the tapered surface of the wedge body. The flange may be moved from the flange of the communication pipe.

2a Valve body 3 Attachment member 13 Closure member 18 Existing bolt 20 Leakage prevention member 32 First sealing member 32b Neck lower part 32d Inner circumferential surface 32e Seal member 34 Second sealing member 34b Neck lower part 35 Nut 36 Bolt 36a Head part 36b Neck Lower part 38 Seal ring B Communication pipe P Existing fluid pipe V Repair valve (pipe connecting member)
S, T Opposing surfaces F1, F2 Flange Fa First insertion hole Fb Second insertion hole AV1 Air valve (pipe connection member)
AV2 Air valve (pipe connecting member)
FP Flange short pipe (pipe connecting member)

Claims (5)

Existing bolt inserted into the first insertion hole formed in the flange of the communication pipe communicating with the existing fluid pipe, and the second insertion hole formed in the flange of the pipe connection member connected to the communication pipe A pipe connecting member detaching apparatus that separates the opposing surfaces of the pair of flanges and inserts a valve body to seal the communication pipe, and detaches the pipe connecting member in an uninterrupted flow state,
A mounting member that is sealed and capable of forming a gap between the opposing surfaces of the pair of flanges, and that accommodates the valve body therein;
In place of the existing bolt, it has at least a leakage preventing member that seals both the insertion holes,
The leakage preventing member includes a first sealing member that seals the first insertion hole, a second sealing member that seals the second insertion hole, and the both sealing members and the both insertion holes. And at least a bolt and a nut to be attached, and an elastic member having elasticity,
By separating the pair of flanges, due to the elastic return force of the elastic member clamped between one flange and the head of the bolt or the nut,
The first sealing member is clamped between the flange of the communication pipe and the head or nut side of the bolt to seal the first insertion hole, and the second sealing member is a pipe connecting member. The pipe connecting member attaching / detaching device is characterized in that the second insertion hole is sealed by being clamped between the flange of the bolt and the head or nut side of the bolt.   2. The pipe connecting member according to claim 1, wherein the bolt and the nut are screwed together with play so that the pair of flanges can be separated without screwing the bolt and nut. Desorption device.   The seal member is interposed between the outer peripheral surface of the neck lower part of the bolt and the inner peripheral surface of at least one of the sealing members through which the bolt is inserted. The desorption apparatus of the pipe connection member of description.   The pipe connecting member according to any one of claims 1 to 3, wherein a seal ring is interposed between a head side or a nut side of the bolt and at least one of the sealing members. Desorption device.   Either one of the sealing members has a short neck lower portion in which a gap is formed on the opposing surface side of the pair of flanges in the insertion hole sealed by the sealing member, and the other sealing member is the sealing member 5. The apparatus for removing and attaching a pipe connecting member according to claim 1, further comprising a long neck lower portion that is inserted through the insertion hole that seals the member and is inserted through the gap.

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