JP2006161906A - Housing type pipe joint - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a housing type pipe joint free of rotation in the circumferential direction when fastening a housing during piping. <P>SOLUTION: The housing type pipe joint comprises the elastically deformable cylindrical housing 2 having a socket 20 to the outer peripheral face of which a branch pipe is connected and into which a water supply pipe 10 is inserted, a seal member 5 provided on the inner peripheral face of the housing 2, a fastening member 3 for shrinking the diameter of the housing 2, and a locking member 4 fixed to at least one end face of the housing 2 so as to protrude to the inner diameter side. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a housing-type pipe joint for connecting, for example, a snow-sprinkling sprinkler installed around a rail laid in a snowy area and its water supply pipe.

  On railway lines laid in snowy areas, in order to operate trains safely, sprinklers (watering devices) with water spray nozzles are installed at predetermined distances (for example, several meters apart) on both sides of the rails. Conventionally, spraying and melting warm water (ground water) on snow that has accumulated on snow has been performed (see Patent Document 1). In Patent Document 1, a large number of water sprinkling devices are arranged on both the left and right sides of a vertical track parallel to each other, and these watering devices are divided into a plurality of groups and are respectively connected to left and right branch water pipes via header pipes and valves. It is described to connect and connect the branch water pipe to the main water pipe. In this type of watering device, since the watering nozzle is required to be positioned upward with respect to the water supply pipe, the sprinkler and the water supply pipe are connected by a pipe joint having a branch port around the joint body. The

  As the pipe joint having a branch port, the housing type pipe joints described in Patent Document 2 and Patent Document 3 are practically used. Patent Document 2 includes a cylindrical housing into which ends of mutually connected pipes are inserted, tightening means for reducing the inner diameter, and a C-shaped gasket housed in the housing. The gasket includes a pipe joint configured to support the inner side of the web with an outer diameter of a wound spring ring that hangs the sealing lip and a web portion that connects the opposing leg portions forming the sealing lip. Has been.

  Patent Document 3 discloses a branch having an end surface formed with a curved surface along the cylindrical surface of the housing by welding on the outer peripheral surface of the cylindrical housing with one end in the circumferential direction being discontinuous, and a groove formed on the inner surface. So that the inner sleeve of the housing is fitted with an internal pressure-sealed rubber sleeve, and the protruding portion of the hollow cylindrical portion of the rubber sleeve is fitted into the branch socket and the tongue is fitted into the groove. A constructed branch pipe joint is described.

Japanese Examined Patent Publication No. 4-64365 (second page, FIGS. 1 and 2) Japanese Patent Publication No. 55-25316 (pages 2 to 4, FIG. 1 and FIG. 2) Japanese Patent No. 2858393 (pages 2 and 3, FIGS. 1 and 2)

  The housing-type pipe joint is formed of a thin steel plate in a substantially cylindrical housing, so it is lightweight and excellent in transportability, and the housing is fixed to the connecting pipe by a simple fastening mechanism consisting of bolts and nuts. Even without special skills, highly reliable construction is possible, and the housing is equipped with anti-disengagement mechanisms at both ends in the axial direction, so that the connection pipe can be fastened in an unprocessed state. Has the advantage of improving.

  In order to connect the sprinkler to the snow-melting device, it is necessary that the joint branch port is held at a predetermined position (for example, vertically upward). However, according to the conventional housing type pipe joint, when the housing is tightened after the water supply pipe is inserted into the housing, the entire housing rotates and tilts, and the branch port cannot be held at a predetermined position in the circumferential direction. There is a problem.

  Accordingly, an object of the present invention is to provide a housing-type pipe joint that can hold a branch port at a predetermined position in the circumferential direction.

  In order to achieve the above-mentioned object, the present invention is provided on an outer peripheral surface of a cylindrical housing having a socket to which a branch pipe is connected, an elastically deformable cylinder into which a water supply pipe is inserted, and the housing. And a fastening member that reduces the diameter of the housing, and a locking member that is fixed to at least one end face of the housing so as to protrude toward the inner diameter side.

  In the present invention, the locking member can be constituted by a support arm extending in the axial direction from an end surface of the housing and a positioning bolt screwed to the support arm and having a tip abutting on the water supply pipe.

  In this invention, the said locking member can be comprised with the wedge-shaped member which the front-end | tip bites into the outer peripheral surface of the said water supply pipe | tube.

  In the present invention, the fastening member includes a rod nut and a rod washer mounted on the housing and a bolt for fastening them, and the locking member is connected to an end portion of the rod nut or the rod washer and has a distal end. It can be comprised with the elbow member contact | abutted to the said water supply pipe | tube.

  According to the present invention, since at least one end surface of the housing has the locking member protruding toward the inner diameter side, the housing is inserted in the circumferential direction with respect to the water supply pipe when the water supply pipe is inserted into the housing and then the housing is tightened. Rotation can be prevented.

  Details of the present invention will be described below with reference to the accompanying drawings. 1 is a side view in which a part of a housing type pipe joint according to an embodiment of the present invention is broken, FIG. 2 is a half longitudinal sectional view, and FIG. 3 is a perspective view showing a state in which a water supply pipe is inserted into the pipe joint. FIG. 4 is a perspective view showing a state in which a water supply pipe is connected to the pipe joint.

  As shown in FIGS. 1 and 2, a housing type pipe joint (hereinafter referred to as a pipe joint) 1 includes a cylindrical housing 2, a socket portion 20 fixed to the outer peripheral surface thereof, and a fastening member 3 for fastening the housing 2. And a locking member 4 fixed to the outer peripheral surface of the housing 2. A cylindrical seal member 5 is mounted inside the housing 2, and a holding member 8 is mounted on one end (left side in FIG. 2) of the seal member 5.

The detail of each part which comprises the pipe joint 1 is as follows.
The housing 2 is an elastically deformable member having a C-shaped cross section obtained by molding a thin plate made of a metal material having corrosion resistance such as austenitic stainless steel (for example, SUS304). This housing 2 has a socket 20 to which an end portion (branch pipe) of a sprinkler (not shown) is joined on its outer peripheral surface, and a flange portion 22 formed by bending both end surfaces in the axial direction to the inner diameter side; , Including folded portions 23a and 23b having spindle-shaped cross sections formed by bending both ends in the circumferential direction into a spindle shape on the outer peripheral side. The socket 20 is formed with a female screw portion 20a into which an end portion of the branch pipe is screwed on an inner peripheral surface thereof and a seal groove 20b that receives a part of the seal member 5, and is used for welding, screw bonding, rivet bonding, adhesion, caulking, or the like. It is fixed to the housing 2 by a known method.

  The fastening member 3 includes a rod washer 31 inserted into the folded portion 23a, a rod nut 32 inserted into the folded portion 23b, and a plurality of bolts (three in FIG. 2) screwed into the rod nut 32 from a direction orthogonal thereto. 33 and a spacer 34 that is mounted so as to penetrate each bolt.

  The locking member 4 is a member that includes a support arm 41 fixed to the outer peripheral surface of the housing 2 and a positioning bolt 43 that is provided on the support arm 41 from the flat surface 42 and is screwed into a screw portion. Supported at both ends. When the housing 2 is tightened, the positioning bolt 43 is fixed at a position where the lower end surface of the positioning bolt 43 comes into contact with the water supply pipe with such a pressure that the rotation of the water supply pipe in the circumferential direction is prevented. Further, the force with which the positioning bolt 43 comes into contact with the water supply pipe 10 can be adjusted by the degree of screwing of the positioning bolt 43.

  The seal member 5 is fitted into a cylindrical portion 51 inserted into the housing 2, lip portions 52 formed at both axial end portions thereof, and a seal groove 20 b formed on the inner peripheral surface of the socket 20. This is a cylindrical packing including the protruding portion 53. When the slide plate 6 having the opening 61 is fitted to the inner peripheral surface of the cylindrical portion 51 at a position corresponding to the socket portion 20, the water supply pipe is inserted obliquely by providing the slide plate 6. Damage to the sealing member 5 is prevented. A stiffener 7 is fitted on the inner peripheral surface of the protruding portion 53 in order to bring it into close contact with the socket 20. The seal member 5 can be formed of an elastic body such as olefin rubber such as ethylene / propylene / gen rubber (EPDM) or nitrile rubber (NBR). Since the slide plate 6 is in contact with the water supply pipe, the slide plate 6 is preferably formed of a metal material having high rigidity and high corrosion resistance (such as the above-described austenitic stainless steel). Since the stiffener 7 is in direct contact with the fluid to be branched (warm water), it may be formed of a material that can be elastically deformed and has corrosion resistance, such as austenitic stainless steel and red copper (10% Zn—Cu alloy). preferable.

  The holding member 8 includes a slip ring 81 that is in close contact with the end surface of the seal member 5 and a plurality of locking claws that are inclined inward from the end surface of the housing 2 in order to prevent the water supply pipe from moving in the axial direction. A grip ring 82 having 83 and a wire ring 84 that presses these members toward the end face of the seal member 5 are configured. These members are formed of a steel material. In particular, the grip ring 82 is preferably formed of a material (for example, SUS301) having higher hardness than the water supply pipe (for example, SUS304).

  According to said pipe joint 1, a water supply pipe is connected as shown in FIG.3 and FIG.4. That is, as shown in FIG. 3, with the bolt 33 loosened, the water supply pipe 10 is inserted into the interior of the housing 2 from both sides. By screwing the positioning bolt 43 screwed into the support arm 41 until the tip part comes into contact with the outer peripheral surface of the water supply pipe 10, the pipe joint 1 is temporarily fixed so as not to rotate around the water supply pipe 10. Next, as shown in FIG. 4, the housing 2 is reduced by tightening the bolts 33 until the spacer 34 is clamped between the folded portions 23 a and 23 b, and the inner peripheral surface of the lip 52 is the outer periphery of the water supply pipe 10. The housing 2 and the water supply pipe 10 are sealed in close contact with the surface. The positioning bolts 43 provided at both ends of the housing 2 and temporarily fixed so as to come into contact with the outer peripheral surface of the water supply pipe 10 are more strongly abutted against the outer peripheral surface of the water supply pipe 10 as the diameter of the housing 2 decreases. The housing 2 is reliably prevented from rotating around the water supply pipe 10. Therefore, since the water supply pipe 10 is connected while the socket 20 provided on the outer peripheral surface of the housing 2 is maintained in the upward posture, a branch pipe (all not shown) connected to the end of the sprinkler is connected to the socket 20. It can be screwed in quickly. The water supply pipe 10 inserted into one end side (right side in FIGS. 3 and 4) of the housing 2 is fixed to the housing 2 by the holding member 8, and the water supply pipe 10 inserted into the other end side of the housing 3 is connected to the seal member 5. Since one of the water supply pipes 10 can move in the axial direction with respect to the joint 1 even when the water supply pipe 10 expands and contracts due to fluctuations in environmental conditions, the pipe joint 1 is damaged or water is supplied. It is possible to prevent the tube 10 from falling off.

  Although not shown, the hot water supplied from the water pipe connected by the pipe joint 1 and sprinkled by the sprinkler is purified from the drainage pit through the dust removal device and the settling tank together with the melted snow water and then the water storage tank. Collected and reused.

The present invention is not limited to the above structure, and the following modifications are possible.
FIG. 5 is a side view showing a state in which a part of a pipe joint according to the second embodiment of the present invention is broken, FIG. 6 is a perspective view showing a state in which a water supply pipe is inserted into the pipe joint, and FIG. It is a perspective view which shows the state which connected the water supply pipe to the coupling, The same part as FIGS. 1-4 is shown with the same referential mark, and the detailed description is abbreviate | omitted.

  The pipe joint 1 shown in FIG. 5 is the same as that shown in FIGS. 1 and 2 except that a wedge-shaped projection member 44 (wedge-like member) as the locking member 4 is fixed to the flange portion 22 formed on the end surface of the housing 2. It has the same structure as the pipe joint shown. The protruding member 44 is attached to a position where the tip of the protruding member 44 comes into contact with the water supply pipe when the housing 2 is tightened.

  According to the pipe joint 1, the water supply pipe 10 is inserted into the inside of the housing 2 from both sides with the bolt 33 loosened as shown in FIG. 6. Next, as shown in FIG. 7, the diameter of the housing 2 is reduced by tightening each bolt 33 until the spacer 34 is clamped by the folded portions 23 a and 23 b. Along with this, the tips of the protruding members 44 fixed to both ends of the housing 2 bite into the outer peripheral surface of the connecting pipe, so that the housing 2 is prevented from rotating around the water supply pipe 10. Accordingly, the socket 20 provided on the outer peripheral surface of the housing 2 can maintain a predetermined position in the circumferential direction as in the pipe joint shown in FIGS. 1 and 2, so that the socket 20 is connected to the end of the sprinkler. A branch pipe (both not shown) can be screwed in quickly.

  8 is a side view showing a state in which a part of a housing-type pipe joint according to the third embodiment of the present invention is broken, FIG. 9 is a perspective view showing a state in which a water supply pipe is inserted into the pipe joint, and FIG. These are perspective views which show the state which connected the water supply pipe to the pipe joint, The same part as FIGS. 1-4 is shown with the same referential mark, and the detailed description is abbreviate | omitted.

  The pipe joint 1 shown in FIG. 8 has the same structure as the pipe joint shown in FIGS. 1 and 2 except that an elbow-like member 45 as the locking member 4 is fixed to the end of the rod washer 31. The elbow-like member 45 is attached at a position where the tip thereof comes into contact with the water supply pipe when the housing 2 is tightened.

  According to this pipe joint 1, the water supply pipe 10 is inserted into the housing 2 with the bolt 33 loosened as shown in FIG. 9. Next, as shown in FIG. 10, the diameter of the housing 2 is reduced by tightening each bolt 33 until the spacer 34 is sandwiched between the folded portions 23 a and 23 b. Accordingly, the tip of the elbow-like member 45 fixed to the end of the rod washer 31 comes into contact with the outer peripheral surface of the water supply pipe 10, so that the housing 2 is prevented from rotating around the water supply pipe 10. Accordingly, the socket 20 provided on the outer peripheral surface of the housing 2 can maintain a predetermined position in the circumferential direction similarly to the pipe joint shown in FIGS. 1 and 2, so that the end of the sprinkler is connected to the socket 20. A branch pipe (both not shown) can be screwed in quickly.

  The present invention is not limited to the structure described in the above embodiment, and various modifications are possible as long as the object is achieved. For example, in each embodiment, the locking member 4 may be provided only on one end face of the housing 2, and this structure can also prevent the housing 2 from rotating around the water supply pipe 10. In FIG. 8, the elbow-like member 45 may be fixed to the end of the bar nut 32.

It is the side view which fractured | ruptured a part of housing type pipe joint which concerns on embodiment of this invention. It is a half longitudinal section of a housing type pipe joint concerning an embodiment of the invention. It is a perspective view which shows the state which inserted the water supply pipe | tube in the housing type pipe joint which concerns on embodiment of this invention. It is a perspective view which shows the state which connected the housing type pipe joint and water supply pipe which concern on embodiment of this invention. It is the side view which fractured | ruptured a part of housing type pipe joint which concerns on the 2nd Embodiment of this invention. It is a perspective view which shows the state which inserted the water supply pipe | tube in the housing type pipe joint which concerns on the 2nd Embodiment of this invention. It is a perspective view which shows the state which connected the water supply pipe | tube to the housing type pipe joint which concerns on the 2nd Embodiment of this invention. It is a side view which shows the state which fractured | ruptured a part of housing type pipe joint which concerns on the 3rd Embodiment of this invention. It is a perspective view which shows the state which inserted the water supply pipe | tube in the housing type pipe joint which concerns on the 3rd Embodiment of this invention. It is a perspective view which shows the state which connected the water supply pipe | tube to the housing type pipe joint which concerns on the 3rd Embodiment of this invention.

Explanation of symbols

1: pipe joint, 10: water supply pipe, 2: housing, 20: socket, 22: flange part, 23a, 23b: folded part, 3: fastening member, 31: bar washer, 32: bar nut, 33: bolt, 34 : Spacer nut, 4: Locking member, 41: Support arm, 42: Milling surface, 43: Positioning bolt, 44: Projection member, 45: Elbow-shaped member, 5: Seal member, 51: Tube part, 52: Lip part 53: protrusion, 6: slide plate, 61: opening, 7: stiffener, 8: holding member, 81: slip ring, 82: grip ring, 83: locking claw, 84: wire ring.

Claims (4)

An outer peripheral surface having a socket to which a branch pipe is connected, an elastically deformable cylindrical housing into which a water supply pipe is inserted, a seal member provided on the inner circumference of the housing, and a fastening for reducing the diameter of the housing A housing-type pipe joint comprising: a member; and a locking member that is fixed to an inner diameter side of at least one end face of the housing. 2. The housing mold according to claim 1, wherein the locking member includes a support arm that extends in an axial direction from an end surface of the housing and a positioning bolt that is screwed to the support arm and has a tip abutting against the water supply pipe. Pipe fittings. 2. The housing-type pipe joint according to claim 1, wherein the locking member is a wedge-shaped member whose tip end bites into an outer peripheral surface of the water supply pipe. The fastening member includes a rod nut and a rod washer mounted on the housing, and a bolt for fastening them, and the locking member is connected to an end of the rod nut or the rod washer, and a tip is connected to the water supply pipe. 2. The housing type pipe joint according to claim 1, wherein the housing type pipe joint is an abutting elbow member.

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