JP2004301308A - Flange type joint - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent smoke filled in a drain pipe from leaking outside even if the seal function is lost when a sealant burns by heat by a fire. <P>SOLUTION: This flange type joint is used for connecting one drain pipe 12 and the other drain pipe, and has a first flange plate 15 fixed to the one drain pipe 12, a second flange plate 25 connected to the first flange plate 15 by a connecting member, the sealant 30 sandwiched between the first flange plate 15 and the second flange plate 25, and capable of sealing a part between the one drain pipe 12 and the other drain pipe, and a fire resistant, nonventilative, and resilient smoke leaking-out preventing member 40 constituted by being sandwiched between the first flange plate 15 and the second flange plate 25 in a state of surrounding the sealant 30. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a flange joint used for connecting one drain pipe to another drain pipe.
[0002]
[Prior art]
A related-art flange-type joint related to this is described in Patent Document 1. As shown in FIG. 5, the flange-type joint 90 includes a first flange plate 92 formed at a tip of a receiving port 101u of one drainage pipe 101 and an opening 94h through which the other drainage pipe 102 passes. And two flange plates 94. Further, a rubber ring-shaped sealing material 96 is sandwiched between the first flange plate 92 and the second flange plate 94.
In order to connect one drain pipe 101 to the other drain pipe 102, first, the other drain pipe 102 is passed through openings 94 h, 96 h between the second flange plate 94 and the ring-shaped sealing member 96, and the drain pipe is connected to the drain pipe 102. The tip of 102 is inserted into the receiving port 101u of one drain pipe 101. Next, the first flange plate 92 and the second flange plate 94 are connected by a plurality of sets of bolts and nuts 98. As a result, the ring-shaped sealing material 96 is deformed between the first flange plate 92 and the second flange plate 94, and the ring-shaped sealing material 96 causes the connection between the receiving port 101u of one drain pipe 101 and the other drain pipe 102. The gap is sealed.
[0003]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 06-017978
[Problems to be solved by the invention]
However, according to the flange type joint 90 described above, a gap S is formed between the joint surface of the first flange plate 92 and the joint surface of the second flange plate 94, and the ring-shaped seal material 96 is formed at the gap S. A part (appearing part 96x) is exposed. Therefore, for example, when the ring-shaped sealing material 96 is burned by the flame heat of a fire and the sealing function is lost, the smoke in the drain pipes 101 and 102 is discharged from the gap between the first flange plate 92 and the second flange plate 94 to the outside. To leak out.
The present invention has been made in order to solve the above-described problems, and a problem to be solved by the present invention is to prevent smoke filled in a drain pipe from leaking outside due to a fire or the like. .
[0005]
[Means for Solving the Problems]
The above-mentioned problem is solved by the invention of each claim.
The invention according to claim 1 is a flange type joint used for connecting one drainage pipe to the other drainage pipe, wherein the first flange plate fixed to the one drainage pipe and the first member are connected by a connecting member. A second flange plate connected to one flange plate, and sandwiched between the first flange plate and the second flange plate, can seal between the one drain pipe and the other drain pipe. A seal material, and a smoke leakage prevention member having a fire resistance, a non-breathable and elastic property, which is sandwiched between the first flange plate and the second flange plate in a state surrounding the seal material. It is characterized by having.
[0006]
According to the present invention, a sealing material for sealing between one drain pipe and the other drain pipe is surrounded by a smoke leakage prevention member, and the smoke leakage prevention member is provided between the first flange plate and the second flange plate. It is sandwiched between. Here, since the smoke leakage prevention member has elasticity, the first flange plate and the second flange plate are connected by the connection member, so that the smoke leakage prevention member is sandwiched between the flange plates. It becomes deformable together with the sealing material. That is, the visible portion of the sealing material exposed between the joint surface of the first flange plate and the joint surface of the second flange plate is covered by the smoke leakage prevention member similarly sandwiched between the flange plates. In addition, the smoke leakage prevention member is pressed between the joint surface of the first flange plate and the joint surface of the second flange plate, so that the airtightness is improved. Here, since the smoke leakage prevention member is fire-resistant and non-breathable, it can maintain the sealing function even when heat is applied by the fire. Therefore, even if the sealing material burns due to the heat of the fire and the sealing function is lost, the smoke filled in the drain pipe does not leak to the outside due to the sealing function of the smoke leakage prevention member.
[0007]
According to the second aspect of the present invention, the first flange plate is formed at the tip of the receptacle provided in one drain pipe, and the second flange plate and the sealing material are connected to the other drainage inserted into the receptacle. It has an aperture through which the tube is passed.
[0008]
According to the third aspect of the present invention, there is provided a fireproof joint material for closing a gap between the opening of the second flange plate and the outer peripheral surface of the other drainage pipe. For this reason, smoke does not leak to the outside from the gap between the opening of the second flange plate and the outer peripheral surface of the other drain pipe.
Further, if the smoke leak preventing member is bonded to the joint surface of the first flange plate or the second flange plate, positioning of the smoke leak preventing member becomes unnecessary, and construction is performed. Becomes easier.
In addition, as described in claim 5, it is preferable that the first flange plate and the second flange plate are made of cast iron from the viewpoint of improving fire resistance and reducing the production cost.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
[Embodiment 1]
Hereinafter, the flange type joint according to the first embodiment of the present invention will be described with reference to FIGS. The flange type joint according to the present embodiment is a joint used for connection of a drainage pipe, FIG. 1 is an overall perspective view of the flange type joint, and FIG. 2 and FIG. 3 are connections of a drainage pipe using the flange type joint. It is a longitudinal section showing an example.
[0010]
The flange type joint 10 is, for example, a joint used to connect a fire-resistant double-layer pipe 60 and a fire-resistant double-layer pipe (not shown). As shown in FIGS. , A first flange plate 15, a second flange plate 25, a sealing material 30, a smoke leakage prevention member 40, and the like. The joint pipe main body 12 is provided with a receiving port 13 at one end (the lower end in FIG. 1 and the like), and a first flange plate 15 is formed at the tip (lower end) of the receiving port 13. The other end (not shown) of the joint pipe main body 12 is configured to be connected to the inner pipe of the fire-resistant double-layer pipe.
The first flange plate 15 is provided with a joint surface 15y corresponding to the joint surface 25y of the second flange plate 25. As shown in FIG. A concave surface 15v is formed. Here, the step surface 15e is formed parallel to the axis.
[0011]
The second flange plate 25 is a ring-shaped plate having a joint surface 25y corresponding to the joint surface 15y of the first flange plate 15, and has a circular opening 25h in the center as shown in FIG. . The inner diameter of the opening 25h is set to a value that allows the inner pipe 62 of the refractory double-layer pipe 60 to be inserted into the receiving port 13 of the joint pipe main body 12. As shown in FIGS. 1 and 2, a ring-shaped receiving surface 25r is formed on the radially inner side of the joining surface 25y of the second flange plate 25 via a step surface 25e so as to surround the opening 25h. ing. Here, the step surface 25e is formed parallel to the axis, and the ring-shaped receiving surface 25r is formed perpendicular to the axis. The inner diameter of the step surface 25 e of the second flange plate 25 is set to be equal to the inner diameter of the step surface 15 e of the first flange plate 15.
[0012]
In the first flange plate 15 and the second flange plate 25, a plurality of bolt holes 15k, 25k are formed at equal intervals in the circumferential direction (FIG. 1 illustrates three bolt holes), and these bolt holes 15k are provided. , 25k, the bolt 52 of the bolt & nut 50 is passed. Then, the bolts 52 and the nuts 54 of the bolt & nut 50 are screwed together and tightened, so that the two flange plates 15 and 25 are connected. In FIG. 1, the bolt & nut 50 is omitted.
That is, the bolt & nut 50 corresponds to the connecting member of the present invention. The joint pipe main body 12 corresponds to one drain pipe of the present invention, and the inner pipe 62 of the fire-resistant double-layer pipe 60 corresponds to the other drain pipe of the present invention.
[0013]
The sealing material 30 is a member for sealing between the receiving port 13 of the joint pipe main body 12 and the inner pipe 62 of the fire-resistant double-layer pipe 60, and is made of rubber and formed in a ring shape as shown in FIG. . An opening 33 is formed at the center of the sealing material 30, and the inner diameter of the opening 33 is set to a value substantially equal to the outer diameter of the inner tube 62 of the fire-resistant double-layer tube 60. A ridge 32f is formed on the outer peripheral surface 32 of the sealing material 30 at a substantially central position in the height direction in a circumferential direction, and the ridge 32f is joined to the first flange plate 15 as shown in FIG. It is arranged between the surface 15y and the joining surface 25y of the second flange plate 25.
[0014]
On the outer peripheral surface 32 of the sealing material 30, an upper vertical surface 32u is formed on the ridge 32f, and a tapered conical convex surface 32v is formed on the upper vertical surface 32u. As shown in FIG. 2, a portion composed of the conical convex surface 32v and the upper vertical surface 32u is configured to be able to fit into a concave portion formed by the conical concave surface 15v of the first flange plate 15 and the step surface 15e. Since the opening 33 of the sealing material 30 has a constant dimension in the axial direction, the thickness of the sealing material 30 is minimized at the distal end surface 31.
A lower vertical surface 32d is formed on the outer peripheral surface 32 of the seal material 30 below the ridge 32f, and a lower end surface 34 of the seal material 30 is formed at right angles to the lower vertical surface 32d. As shown in FIG. 2, a portion composed of the lower vertical surface 32 d and the lower end surface 34 is configured to be fittable into a recessed portion formed by the step surface 25 e of the second flange plate 25 and the ring-shaped receiving surface 25 r. I have.
[0015]
The smoke leakage prevention member 40 is a member that covers the ridge 32f (visible portion) of the sealing material 30 sandwiched between the joint surface 15y of the first flange plate 15 and the joint surface 25y of the second flange plate 25, It is formed in a substantially ring shape from a fire-resistant, non-breathable and elastic material.
An opening 42 is formed at the center of the smoke leakage prevention member 40, and the inner diameter of the opening 42 is set substantially equal to the outer diameter of the ridge 32 f of the sealing material 30. For this reason, it becomes possible to surround the portion of the ridge 32f of the sealing material 30 with the smoke leakage prevention member 40.
[0016]
As shown in FIG. 2, the thickness dimension of the smoke leakage prevention member 40 is set to be sufficiently larger than the thickness dimension of the ridge 32f of the sealing material 30. Further, as shown in FIG. 1, the width W1 of the smoke leakage prevention member 40 is defined by the width W0 of the joint surfaces 15y and 25y of the first flange plate 15 and the second flange plate 25 to the width W2 of the ridge 32f. It is almost equal to the subtracted value. For this reason, the smoke leakage prevention member 40 is accommodated inside the joining surfaces 15y and 25y. An arc-shaped notch 44 is formed in the smoke leakage prevention member 40 at a position where the notch 44 interferes with the bolt 52 of the bolt & nut 50.
[0017]
Next, a procedure for connecting the joint pipe main body 12 (one drain pipe) of the flange type joint 10 and the inner pipe 62 (the other drain pipe) of the fire-resistant double-layer pipe 60 will be described.
First, as preparation for construction, the smoke leakage prevention member 40 is bonded to a predetermined position of the joint surface 25y of the second flange plate 25 or the joint surface 15y of the first flange plate 15. Next, a portion formed by the lower end surface 34 and the lower vertical surface 32d of the sealing material 30 is fitted into the recessed portion formed by the ring-shaped receiving surface 25r and the step surface 25e of the second flange plate 25, and the sealing material 30 It is set on the flange plate 25. In this state, the projections 32f of the sealing material 30 are stored in the openings 42 of the smoke leakage prevention member 40. The protrusion 32f of the sealing material 30 is stored in advance in the opening 42 of the smoke leakage prevention member 40, and the two members 32f and 42 are bonded to each other, and the sealing material 30 and the smoke leakage prevention member 40 are integrated with the second flange. It is also possible to set it on the plate 25.
The smoke leakage prevention member 40 is not adhered to the ridge 32f of the sealing material 30, the joint surface 25y of the second flange plate 25 or the joint surface 15y of the first flange plate 15, but is sandwiched between the joint surfaces 15y. Or just
[0018]
Next, the inner pipe 62 of the refractory double-layer pipe 60 is passed through the opening 25 h of the second flange plate 25 and the opening 33 of the sealing material 30 at the construction site. The refractory double-layer pipe 60 is a drain pipe having a structure in which an inner pipe 62 made of hard vinyl chloride is covered with an outer pipe 64 made of fire-resistant mortar. It is held so as to protrude from the tip.
Next, as shown in FIG. 2, the tip of the inner pipe 62 of the refractory double-layer pipe 60 is inserted into the receiving port 13 of the joint pipe main body 12. Further, a portion composed of the conical convex surface 32v and the upper vertical surface 32u of the sealing material 30 is fitted into a concave portion formed by the conical concave surface 15v and the step surface 15e of the first flange plate 15. As a result, the projections 32f of the sealing material 30 and the smoke leakage prevention member 40 are disposed between the joining surfaces 15y and 25y of the first flange plate 15 and the second flange plate 25.
[0019]
Next, the bolt hole 15k of the first flange plate 15 and the bolt hole 25k of the second flange plate 25 are aligned, and the bolt 52 of the bolt & nut 50 is passed through both bolt holes 15k, 25k. Then, the nut 54 is screwed into the bolt 52 and tightened, so that the two flange plates 15 and 25 are connected.
When the joint surface 15y of the first flange plate 15 and the joint surface 25y of the second flange plate 25 approach each other by tightening the bolts and nuts 50, the sealing material 30 is compressed and contracted in the axial direction as shown in FIG. , Trying to expand radially. As a result, the inner tube 62 of the fire-resistant double-layer tube 60 is tightened by the sealant 30 from the outside in the radial direction. Further, when the sealing material 30 is compressed in the axial direction, the distal end surface 31 of the sealing material 30 tries to enter the gap between the receiving port 13 of the joint pipe main body 12 and the inner pipe 62 of the fire-resistant double-layer pipe 60, and the receiving port 13 and the inner tube 62 are sealed.
[0020]
In addition, when the joint surface 15y of the first flange plate 15 and the joint surface 25y of the second flange plate 25 approach each other, the ridge 32f of the seal member 30 and the smoke leakage prevention member 40 are connected to each other by the joint surfaces 15y, 25y. Sandwiched between. As a result, the periphery of the ridge 32f (appearing portion) of the sealing material 30 is sealed by the smoke leakage prevention member 40.
Next, as shown in FIG. 3, a gap between the opening 25 h of the second flange plate 25 and the inner tube 62 of the fire-resistant double-layer tube 60, and a gap between the second flange plate 25 and the outer tube 64 of the fire-resistant double-layer tube 60. During this time, a wet refractory joint material 65 is filled.
In this state, the connection between the joint pipe main body 12 (one drain pipe) of the flange type joint 10 and the inner pipe 62 (the other drain pipe) of the fire-resistant double-layer pipe 60 is terminated.
[0021]
As described above, according to the flange type joint 10 according to the present embodiment, the sealing material 30 is surrounded by the smoke leakage prevention member 40, and the smoke leakage prevention member 40 is connected to the joining surfaces 15y, 15y of the respective flange plates 15, 25. It is sandwiched between 25y. For this reason, the ridge 32f (visible portion) of the sealing material 30 sandwiched between the two flange plates 15 and 25 is covered by the smoke leakage prevention member 40 similarly sandwiched between the two flange plates 15 and 25. Become like Here, since the smoke leakage prevention member 40 is fire-resistant and non-breathable, it can maintain the sealing function even when heat is applied by a fire. For this reason, even if the sealing material 30 burns due to the flame heat of the fire and the sealing function is lost, the smoke filled in the refractory double-layer pipe 60 does not leak outside due to the sealing function of the smoke leakage prevention member 40. Further, it also has a function of protecting the sealing material 30 by its own fire resistance against flame heat from the outside of the smoke leakage prevention member 40.
[0022]
Further, since the gap between the second flange plate 25 and the inner pipe 62 of the fire-resistant double-layer pipe 60 is closed by the fireproof joint material 65, smoke does not leak out from the gap to the outside.
Further, since the smoke leakage prevention member 40 is adhered to the joint surface 25y of the second flange plate 25, the positioning and the like of the smoke leakage prevention member 40 become unnecessary, and the construction is facilitated.
[0023]
In the present embodiment, an example is shown in which the ridge 32f of the sealing material 30 and the smoke leakage prevention member 40 are sandwiched between the joint surface 15y of the first flange plate 15 and the joint surface 25y of the second flange plate 25. However, as shown in FIG. 4, the sealing material 30 is sandwiched between the pressing surface 15p of the first flange plate 15 and the pressing surface 25p of the second flange plate 25, and the smoke leaks between the joint surfaces 15y, 25y. The structure which clamps only the prevention member 40 may be sufficient.
Further, in the present embodiment, an example is shown in which the joint pipe main body 12 and the inner pipe 62 of the fire-resistant double-layer pipe 60 are connected by the flange type joint 10, but as shown in FIG. It is also possible to connect with the cast iron pipe 72. The gap between the second flange plate 25 and the drainage cast iron pipe 72 is closed by the fireproof joint material 65.
[0024]
In the present embodiment, the flange type joint 10 having the joint pipe main body 12 has been described as an example, but a flange type joint without the joint pipe main body 12, that is, a first flange plate, a second flange plate, and a seal The present invention can also be applied to a flange type joint made of a material or the like.
[0025]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, even if a sealing material burns and loses a sealing function by the flame heat of a fire, the smoke filled in the drainage pipe does not leak to the outside by the sealing function of a smoke leak prevention member. In addition, the sealing material can be protected by the smoke leakage prevention member against external flame heat.
[Brief description of the drawings]
FIG. 1 is an overall perspective view of a flange type joint according to Embodiment 1 of the present invention.
FIG. 2 is a longitudinal sectional view illustrating a connection example of a drain pipe using a flange type joint.
FIG. 3 is a longitudinal sectional view illustrating a connection example of a drain pipe using a flange type joint.
FIG. 4 is a longitudinal sectional view illustrating a connection example of drainage pipes using another flange type joint.
FIG. 5 is a longitudinal sectional view illustrating a connection example of a drainage pipe using a conventional flange type joint.
[Explanation of symbols]
12 Fitting pipe body (one drain pipe)
13 Receptacle 15 First flange plate 15y Joining surface 25 Second flange plate 25y Joining surface 30 Sealing material 40 Smoke leakage prevention member 50 Bolt & nut (connection member)
60 Refractory double-layer pipe 62 Inner pipe (the other drain pipe)
65 Fireproof base material 72 Cast iron pipe for drainage (the other drainage pipe)

Claims (5)

A flange type joint used for connection between one drain pipe and the other drain pipe,
A first flange plate fixed to the one drain pipe;
A second flange plate connected to the first flange plate by a connecting member;
A sealing member sandwiched between the first flange plate and the second flange plate, and capable of sealing between the one drain pipe and the other drain pipe;
A structure that is sandwiched between the first flange plate and the second flange plate in a state surrounding the sealing material, and is a fireproof, non-breathable, and elastic smoke leakage prevention member;
A flange type joint characterized by having: It is a flange type joint of Claim 1, Comprising:
The first flange plate is formed at a tip of a receiving port provided in one drain pipe,
A flange-type joint, wherein the second flange plate and the seal member have an opening through which the other drain pipe inserted into the receptacle is passed. It is a flange type joint of Claim 2, Comprising:
A flange type joint comprising a fireproof joint material for closing a gap between an opening of a second flange plate and an outer peripheral surface of the other drainage pipe. The flange type joint according to any one of claims 1 to 3, wherein
A flange type joint, wherein the smoke leakage prevention member is bonded to a joint surface of the first flange plate or the second flange plate. The flange type joint according to any one of claims 1 to 4, wherein
A flange type joint, wherein the first flange plate and the second flange plate are made of cast iron.

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