JP2008121732A - Branch joint, snow melting sprinkler pipe unit using the same, and snow melting panel unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a branch joint for stably maintaining connection to a resin pipe while absorbing the expansion of the resin pipe with an atmospheric temperature change, or for strengthening connection to the resin pipe and additionally securing the strength of a branch pipe to which an external device or a branch pipe is connected. <P>SOLUTION: A collar portion 22a of the branch pipe 22 is locked to the flow path hole inner face of a joint body 11 so that a cylinder portion 22b of the branch pipe 22 is protruded from a neck portion 11r of the joint body. Then, the neck portion 11r of the joint body 11 or its vicinity is held between a fixture 23 annularly mounted on the cylinder portion 22b and the collar portion 22a to fix the branch pipe 22. In addition, an electric heat wire 31 is wired to at least one position on a connection portion to a metal and resin composite resin pipe B to form an electrically fused connection structure. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a branch joint for connecting resin pipes and branching them at the same time, and a snow-fusing sprinkler piping unit and a snow-fighting panel unit using the branch joint.

  In order to branch a branch pipe from a pipe (main pipe) for flowing a fluid, a branch pipe can be connected to this branch connection portion by using a so-called branch joint that can branch at the same time as connecting the pipes together. In general, a device such as a water faucet is arranged in the middle of the pipe, and a branch pipe is connected to this.

  As the former branch joint, for example, there is a branch joint already proposed by the present applicant. This branch joint has a housing in which at least one opening is provided on the outer peripheral surface, a branch pipe connection socket is joined to the opening, and an elastic seal member having a hollow protrusion at a position corresponding to the branch pipe connection socket. The elastic seal member covers the inner circumference of the flow path in the longitudinal direction of the housing, and is inserted into the housing by inserting the hollow protrusion into the branch pipe connection socket, and has one end in the axial direction of the housing. Is a fixed end provided with a grip ring for preventing the connected pipe from coming off, and the other end is a free end provided with only a lip packing (see, for example, Patent Document 1).

The latter water faucet has, for example, a resin saddle having a joining surface curved with a predetermined curvature, and a heat generating element for fusing provided on the inner surface thereof, and is provided so as to protrude from the central portion of the resin saddle. And a short pipe portion having an external thread on the outer peripheral surface, a main body having one end fitted to the inner peripheral surface of the short pipe portion, and formed on the outer peripheral surface of the main body and locked to the end surface of the short pipe portion. And a metal adapter having a hook.
The water faucet configured in this way melts and fixes the outer peripheral surface of the main pipe and the inner surface of the resin saddle by heating the heating element, and then inserts a perforating jig from the top of the water faucet. A hole is drilled in the pipe wall of the main pipe so that the main pipe communicates with the branch pipe (see, for example, Patent Document 2).

Japanese Patent Laying-Open No. 2005-155705 (first page, FIG. 2) Japanese Patent No. 3634216 (3rd, 4th page, FIG. 1)

  By the way, although the above-mentioned branch joint is used for various piping systems, for example, it is also used for a snow extinguishing system for removing snow falling on a track on a railway line in a cold district.

  This snow-melting system includes a sprinkler watering method and a snow-dissipating panel unit type that uses a heat-dissipating plate using water as a heat medium and melts snow falling on the heat-dissipating plate. For example, in the former sprinkler watering method, a plurality of 5-6 m steel pipes are connected in a straight line along a track through a branch joint, and a sprinkler head is connected to the branch portion of each branch joint. ing.

  Therefore, since the piping is made of metal as described above, the entire weight becomes heavy. As a result, it is necessary to attach a corresponding support member that supports the entire weight in the middle of the branch joint and the steel pipe. The problem which should be improved in workability has arisen. However, in order to solve such a problem, using a resin tube seems to solve it at first glance. However, however, there are the following problems, and the resin tube cannot be simply adopted.

First of all, although the conventional branch joint described above is suitable with a fastening mechanism for tightening a steel pipe with bolts and nuts in an extendable manner, it is a fastening mechanism with bolts and nuts. It is. The resin pipe has a coefficient of thermal expansion that is an order of magnitude greater than that of the steel pipe (steel pipe: 1.2 × 10 ⁻⁵ / ° C., resin pipe: 1.3 × 10 ⁻⁴ / ° C.). It was not easy to balance the expansion / contraction due to and the fastening force with adhesion. That is, if the amount of expansion / contraction increases by an order of magnitude, it can be considered that the fastening force is adversely affected and the sealing performance is deteriorated as a result.

  Even if the latter faucet is adopted, this faucet is not designed to absorb the expansion and contraction of the tube, and each component other than the metal adapter is made of resin. Therefore, if the sprinkler head in which the nozzle rotates is connected to the short tube portion, it can be easily estimated that the short tube portion is damaged by the rotational moment acting on the short tube portion, and it cannot be adopted.

  As described above, the latter water faucet is heated and melted and fixed to the outer peripheral surface of the main pipe, and then a drilling jig is inserted from the upper part of the water faucet to make a hole in the main pipe wall. Since it is drilled to communicate from the main pipe to the branch pipe, it takes time and labor separately from the connection work between the pipes. In particular, when constructing a snow extinguishing system on railway lines, there are often cases where construction must be completed in a very short period of time, and it is desirable to reduce field work as much as possible. In this respect, the latter water faucet is inconvenient for easily dealing with such a case.

  Therefore, the present invention has been made in view of such a situation, and the weight of the piping unit can be reduced and the piping construction work at the site can be reduced. Further, the joining strength of the main pipe connecting portion and the strength of the branch connecting portion. It is an object of the present invention to provide a branch joint that can improve the temperature, a snow-sprinkler sprinkler piping unit and a snow-break panel unit using the branch joint.

In order to solve the above technical problem, the branch joint according to the present invention, the snow-sprinkler sprinkler piping unit and the snow-break panel unit using the branch joint have the following technical means.
That is, the branch joint according to claim 1 is a branch joint including a joint main body provided with a flow passage hole for connecting resin pipes and connecting the resin pipes, and a branch portion for branching the flow path to the outside. And the branch part is a neck part integrally projecting from the joint body, and a cylinder part inserted and fitted to project from a through hole communicating the flow path hole and the neck part of the joint body, A branch pipe provided with a flange portion that is locked to the inner surface of the flow path hole, and the tube portion that protrudes from the neck portion of the joint body, and the joint body is sandwiched by the flange portion. A fixing tool for fixing the branch pipe and sealing means for preventing leakage from the through hole to the outside of the joint body are provided.

  According to the technical means of the first aspect of the present invention, it has a simple structure of a joint body provided with a neck, a branch pipe, a fixture and a sealing means, and the cylindrical portion of the branch pipe is supported by the neck of the joint body. Therefore, the strength is high and stable even when a tilting force, a rotating force, or vibration is applied, and the sealing performance is not impaired. On top of that, the collar part is locked along the inner peripheral curved surface around the through hole, and the joint body is clamped and clamped by a fixture so that the collar part itself cannot rotate forward and backward. It has a structure, and the strength is increased without receiving a rotational moment at the flange portion, thereby damaging the cylindrical portion or rotating the branch pipe itself.

The branch joint according to claim 2, wherein the joint body is made of a thermoplastic resin, the branch pipe and the fixture are made of metal, and the flow path hole is formed at an end thereof. A main pipe connecting portion for connecting the resin pipe is formed, and at least one of the main pipe connecting portions contains a heating wire spirally wound on an inner peripheral surface, and the main pipe connecting portion and the The resin pipe is configured to be connected by fusion by electric heat.
According to this configuration, the joint body is made of a thermoplastic resin to reduce the weight, and the main pipe connection part for connecting the resin pipe is made into a fusion structure by electric heat, so that the construction work is simple. The resin pipe and the joint body are firmly connected. In addition, the branch pipe and the fixture can be made of metal to improve the strength.

The branch joint according to claim 3 is characterized in that a reinforcing ring is fitted to the outer surface of the joint body corresponding to the fused portion by the electric heat.
According to this configuration, even if the heat generating portion structure is less likely to generate a fusion interface pressure due to electric heat, it is possible to suppress the escape of expansion of the portion during fusion and ensure the interface pressure.

The branch joint according to claim 4 is characterized in that the fixing member is screwed with an upper portion of the cylindrical portion, and the cylindrical portion is provided with a branch connecting portion for connecting an external device or a branch pipe. Features.
According to this configuration, it is possible to reduce the weight and height by connecting the external device or the branch pipe directly to the branch connection portion provided in the tube portion or the fixture.

  The snow-sprinkling sprinkler piping unit according to the present invention uses the above-described branch joint, and is connected to the branch joint, a sprinkler head that is connected to the branch connection portion and sprinkles water while rotating, and the main pipe connection portion. And a composite resin tube having a tubular metal plate with a plurality of opening holes interposed in the wall thickness of the tube main body, at least the outer peripheral surface of which is made of thermoplastic resin, It is characterized by being piped so as to be able to extinguish snow.

  A snow extinguishing panel unit according to the present invention uses the above-described branch joint, and includes a heat radiating plate provided with a snow receiving surface on the surface, and a heat radiating tube arranged on the back surface of the heat radiating plate to flow a heat medium. A snow-melting panel provided, connected to the main pipe connection section, connected to the main pipe connection section, a plurality of water supply pipes that send the heat medium sent from the supply source to the snow extinguishing panel, A plurality of water return pipes for returning the heat medium discharged from the snow-melting panel to the supply source, and one end of the branch joint connected to the inlet of the heat radiating pipe and the other end connected to the water supply pipe. A first connecting pipe connected to the branch connecting portion, one end connected to the outlet of the heat radiating pipe, and the other end connected to the branch connecting portion of the branch joint connected to the return water pipe. And 2 connecting pipes.

  According to the snow-sprinkling sprinkler piping unit or the snow-discharging panel unit of the present invention, the overall weight can be reduced by constructing the snow-sprinkling sprinkler piping unit using the above-described branch joint or by constructing the snow-dissipating panel unit. While lightening and reducing on-site construction of the support member, etc., it is possible to cope with expansion and contraction of the resin tube and to strengthen the connection with the resin tube.

  According to the present invention, the joint body having a neck portion, a branch pipe, a fixture, and a sealing means have a simple configuration, and the tubular portion of the branch pipe is supported by the neck portion of the joint body. Even when tilting, rotating, or vibrating, the strength is high and stable, and the sealing performance is not impaired. Also, even if the cylinder part is damaged by the rotational moment acting on the cylinder part, it is only necessary to disassemble the branch pipe part and replace the sealing means without exchanging the entire joint. Can be improved.

  In addition to the above effects, a structure that suppresses thermal expansion while being a resin pipe by constructing a snow extinguishing sprinkler piping unit using the above-mentioned branch joint and resin pipe, or by making it a snow extinguishing panel unit And since the whole weight becomes light, the number of the supporting members which support the whole weight can be reduced significantly, and workability and economical efficiency can be improved.

  Next, an embodiment of a branch joint according to the present invention, a snow-melting sprinkler piping unit and a snow-breaking panel unit using the branch joint will be described. 1 is a sectional perspective view of a branch joint according to the present embodiment, FIG. 2 is a sectional perspective view of a composite resin pipe used in the unit of the present invention, and FIG. 3 is an exploded perspective view of the branch joint according to the present embodiment. 4 is a cross-sectional view of a branch joint according to another embodiment, FIG. 5 is a partial cross-sectional perspective view of a snow-sprinking sprinkler piping unit according to the present embodiment, and FIG. 6 is a snow-discharging sprinkler piping unit according to the present embodiment. It is a top view which shows the construction example of. Moreover, FIG. 7 is an external view of the snow extinguishing panel unit according to the present embodiment.

As shown in FIG. 1, the branch joint A according to the first embodiment includes a joint body 11 and a branch portion 21.
As shown in FIG. 1, the joint body 11 is integrally formed with a pipe-shaped straight pipe portion having a required length made of a thermoplastic resin such as polyethylene and a neck portion 11 r that forms a through hole 11 a in the middle portion thereof. Yes. A spiral groove 11b is formed on the inner peripheral surface of both ends of the straight pipe portion over a predetermined length, and a heating wire 31 is disposed in the groove. The heating wire 31 may be a resin-coated wire, but in this example, a bare wire not coated with a resin is used, and metal terminals 32 connected by welding or the like are connected to the joint body 11 at both ends. It is erected so as to be exposed on the outer surface of the main body 11. In addition, it is not always necessary to provide a metal terminal. For example, the end of the heating wire may be taken out of the joint body and connected to an energization device described later.
As shown in the figure, the heating wire 31 is disposed so as to be fitted into a spiral groove 11b formed continuously so that both end sides of the joint body 11 are dense across the through hole 11a. The heating wire is exposed. This dense heating wire 31 portion is a main pipe connecting portion 11c that connects the resin pipe B (composite resin pipe), and the entire inside of the communicating pipe is a flow path hole 11d.

  In addition, an annular reinforcing ring 6 is fitted on the outer surface of the joint body 11 corresponding to the fused portion by the heating wire. The reinforcing ring 6 is made of a member such as resin or metal, and the reinforcing ring 6 is heated and thermally expanded in advance, and the thermally expanded reinforcing ring 6 is fitted to the above-described portion of the joint body 11 at normal temperature. Let As a result, the diameter of the ring is reduced with cooling, and the ring can be attached in an interference fit state. The reinforcing ring 6 literally has a reinforcing effect, but has an effect by holding a tightening force. In the case of this example, since the joint body 11 is made of a thermoplastic resin such as polyethylene, the entire joint body 11 is thermally expanded when a heating wire is energized. For this reason, it is difficult to obtain a fusion interface pressure necessary for filling the gap between the resin pipe with the expansion resin and fusing. Thus, by providing a reinforcing ring, the expansion pressure is tightened so as not to escape outward, and the thermal expansion in the radial direction of the joint body 11 can be suppressed to exert the function of maintaining the fusion interface pressure. . For this reason, by providing the reinforcing ring 6, the branching joint A and the resin pipe B are held by holding the tightening force to reduce the diameter toward the inner diameter side, and suppressing the escape of the expansion pressure at the time of fusion by electric heating. Can be reliably fused.

Further, it is also possible to apply a suitable current to the heating wire 31 of the branch joint A shown in FIG.
Specifically, as shown in FIG. 4, in the joint body 11 in which the metal terminals 32 are connected to both ends of the heating wire 31 disposed on the inner peripheral surface, an outer diameter larger than the outer diameter of the resin tube B is provided. The straightening mask 43 is inserted into the main pipe connection portion 11c, and the heating wire 31 is heated by an energizing power source (not shown) connected to the metal terminal 32 to obtain the branch joint A ′.
Note that the same components as those shown in FIG. 1 are denoted by the same reference numerals and description thereof is omitted.

  That is, by heating the heating wire 31, the thermoplastic resin around the heating wire 31 is melted, and when this is cooled, the heating wire 31 exposed on the inner peripheral surface side of the joint body 11 is made of thermoplastic resin. A resin film 41 is formed so as to be covered. Since the resin film 41 is formed integrally with the joint body 11, the branch joint A 'can prevent the heating wire 31 from dropping from the spiral groove 11b as compared with the branch joint A shown in FIG.

  Further, in order not to adversely affect the heating wire and the fused portion, annular concave grooves are provided at both ends of the joint body, and a packing 11g is provided here. This packing 11g has a sealing action that seals between the inner peripheral surface of the joint body and the resin pipe to be connected, and even after the pipe is connected, moisture and dust can enter the channel hole 11d from the end opening of the joint body. I try not to get in.

  Further, the packing 11g plays a role of temporary fixing before the branch joint A and the resin pipe B are fusion bonded. Specifically, when a sprinkler head S described later is connected to the branch portion 21 (see FIG. 5), the sprinkler head S needs to be erected vertically. However, before the branch joint A and the resin pipe B are fusion bonded, the center of gravity increases due to the connection of the sprinkler head S, and it is difficult to keep the sprinkler head S vertical. Since the packing 11g moderately supports the resin pipe B with its elastic force, it is easy to vertically adjust the sprinkler head S, and the branch joint A does not rotate even during fusion bonding. It can be held moderately.

Next, as shown in FIG. 2, the resin tube B is formed by integrating a tubular metal plate b1 provided with a plurality of opening holes b2 inside a wall of a tube body b3 made of a thermoplastic resin. It is a resin composite resin tube that enables fusion by electric heating with the main pipe connection portion 11c described above, and at the same time, increases mechanical strength and suppresses thermal expansion that is a high degree of physical properties of the resin tube B. It can be done.
The tubular metal plate b1 provided with the plurality of opening holes b2 may be a punching metal or a metal plate b1 incorporated in a net shape, and is not particularly limited. Further, the above-described resin tube B (composite resin tube) is only required to be composed of a thermoplastic resin at least on the outer peripheral surface side, and is a tube metal plate b1 provided with a plurality of opening holes b2. A layer structure or a three-layer structure in which the inner peripheral surface side is made of different types of resin materials or other structural materials may be used.

Further, it is possible to adjust the tube strength and the fusion strength of the fusion part by the magnitude of the aperture ratio of the opening hole b2. For example, when the aperture ratio is increased, the bonding between the inner and outer resin layers is increased and the fusion strength is increased, while the tube strength is decreased and the elongation due to thermal expansion is increased. Conversely, if the aperture ratio is small, the fusion strength is low, but the tube strength is high and the elongation is small. It is desirable to select these according to the situation.
Further, the end treatment of the resin tube B is not particularly limited. However, if the end portion of the resin tube B is not treated, the metal plate b1 and water contact or the tube body b3 and the heating wire 31 There is a possibility that water or dust may enter between them, which may cause corrosion of the metal plate or poor fusion strength. Therefore, for example, it is desirable that the ring-shaped member b4 is formed of resin or other material that does not corrode and is bonded or fixed to the end of the resin tube B.

Next, the configuration of the branching unit 21 will be described in detail with reference to FIG. The branch portion 21 includes a branch pipe 22, a fixture 23, and a sealing means 24.
The branch pipe 22 is vertically erected from the center of the flange portion 22a and a substantially rectangular flange portion 22a formed by convexly bending a metal plate member along the inner peripheral surface of the flow path hole 11d. A cylindrical portion 22b made of a hollow metal pipe having a required length is integrally formed. It is made of a metal that does not easily rust, such as stainless steel, brass, or bronze, and can be integrally formed by welding the two together or by forging. Further, the cylindrical portion 22b is supported by the neck portion 11r of the joint main body from the base portion to the middle portion, and a male screw 22c to be screwed with the fixture 23 described later is formed from the middle portion to the front portion. A branch connection portion 22d made of a female screw for connecting an external device or a branch pipe is formed on the inner surface side.

The branch pipe 22 is inserted and assembled into the through hole 11a from the end opening of the joint body 11, but the cylindrical part 22b is projected from the neck part 11r of the joint body 11, and the base part is inside the flow path hole 11d. The flange 22a, which is a curved surface shape along the peripheral surface and is substantially rectangular in plan view, is provided so as to abut against and engage with the inner surface of the joint body. Therefore, the branch pipe 22 has the collar portion 22a locked to the inner peripheral surface of the flow path hole 11d so as not to rotate forward and backward, and is supported by the neck portion 11r, so that the branch pipe 22 is stably placed upright. The structure is strong against external forces such as rotational force and vibration.
The locking structure incapable of forward / reverse rotation is not limited to the shape of the flange portion along the inner peripheral surface described above. For example, a concave portion that matches the shape of the flange portion is provided on the inner peripheral surface, and It can be configured to be fitted, or a locking member such as a pin can be separately provided so as not to rotate.
Furthermore, a plurality of convex portions (preferably a sharp shape) may be provided on the collar portion so as to bite into the inner peripheral surface of the flow path hole 11d around the through hole. That is, the flange portion 22a is not particularly limited as long as the flange portion 22a is locked to the inner peripheral surface of the flow path hole 11d so as not to rotate forward and backward.

The fixing device 23 is a substantially annular metal member, and a female screw 23b that engages with a male screw 22c formed in the cylindrical portion 22b is formed on the inner peripheral surface of the tip portion, and the inner periphery of the midway portion. A groove 23c for a seal member that seals between the cylinder portion 22b on the surface, and a groove 23d for a seal member that seals between the neck portion 11r of the joint body on the inner peripheral surface of the lower end portion, respectively. Is formed. The material is not particularly limited, but it is desirable that the material is rust-resistant metal such as stainless steel, brass or bronze.
Then, O-rings 24a and 24b are attached to the fixture 23 as seal members, screwed and screwed into male screws 22c formed on the cylindrical portion 22b, and the through hole 11a is formed between the flange portion 22a and the fixture 23. By sandwiching the edge portion, the branch pipe 22 is erected and supported in a direction orthogonal to the resin tube B. The branch connection portion 22d is appropriately formed according to the external device or branch pipe to be connected, and is not limited to the female screw.

To connect the branch joint A and the resin pipe B, first, the resin pipe B is inserted into the main pipe connecting portion 11c until the end of the resin pipe B comes into contact with the flange portion 22a. By connecting a metal terminal 32 and an energization device (not shown) and applying a voltage, a current flows, the heating wire 31 generates heat due to Joule heat, and the joint body 11 and the resin tube B formed of thermoplastic resins are mutually connected. Can be fused and connected.
Further, for connection between the branch joint A and an external device such as a sprinkler head, the external device is engaged (screwed) with the branch connection portion 22d. Thereafter, a locking pin can be inserted into the threaded portion between the fixture 23 and the cylinder portion 22b to complete the fixing.
As described above, the branch joint A can firmly connect the resin pipe B, and at the same time can maintain the robustness of the cylindrical portion 22b over a long period of time.

(Embodiment 2)
As shown in FIG. 5, the second embodiment includes the branch joint A exemplified in the first embodiment, the sprinkler head S in which the nozzle s1 rotates, and the resin pipe B (composite resin pipe) described above. A snow extinguishing sprinkler piping unit SU is illustrated. The sprinkler head S has a well-known structure including a base s2 that is screwed with a branch connection portion made of a male screw, and a nozzle s1 that rotates by the reaction of water by watering, and detailed description thereof is omitted.
The snow extinguishing sprinkler piping unit SU connects a plurality of resin pipes B (composite resin pipes) of a required length in a straight line through branch joints A along, for example, a railroad track. The sprinkler head S is connected to the branching portion 21 of the joint A and constructed.
The snow extinguishing sprinkler piping unit SU constructed in this way has a strong connection with the resin pipe B, and is an extremely lightweight resin pipe B with mechanical strength, so that the overall weight can be reduced. As a result, in the middle of the branch joint A and the resin pipe B, the number of corresponding support members that support the entire weight can be greatly reduced or eliminated.

  In addition, the sprinkler head S in which the nozzle s1 rotates makes the branch pipe and the fixture constituting the branch section 21 made of metal even when a rotational moment is applied to the cylinder portion, and the collar portion of the branch pipe is curved along the inner surface. Because of its rectangular shape, it exhibits resistance to external forces such as rotation. Furthermore, since the joint body is sandwiched and fixed by the neck part, the collar part, and the fixture of the joint body, the cylinder part is not damaged, and the robustness can be maintained for a long time.

  Moreover, if the snow-sprinkling sprinkler piping unit SU is constructed using the resin pipe B described above, expansion and contraction due to a change in temperature can be suppressed by a metal plate, and substantially the same as a steel pipe. Therefore, it is possible to bring out the advantages of both strength and low expansion / contraction of the steel pipe and weight reduction by the resin pipe, and it is possible to reduce the supporting member that supports the piping unit.

FIG. 6 shows a plan view of the construction of the snow extinguishing sprinkler piping unit SU.
The snow extinguishing sprinkler piping unit SU is fixedly arranged by the fixing means R along the track X of the road or railway, and the amount of water sprinkled from the sprinkler head S by being branched from the water supply pipe M by the cheese joint T is supplied. The water supply pipe M is a steel pipe or resin pipe having a nominal diameter of about 100A to 300A, and is extended along the track X by using a pipe joint F appropriately. Further, for example, every 150 m from this water supply pipe M, a branch pipe is taken out at a cheese joint T, and a snow extinguishing sprinkler piping unit SU is connected to the tip of the elbow joint L that is changed along the track X. The snow-splicing sprinkler piping unit SU is connected to the branch joint A every several meters, and water is sprinkled from the sprinkler head S connected to the branch portion 21.

  As described above, the snow-shrinking sprinkler piping unit SU using the resin pipe B has the advantages of both the strength and low expansion / contraction of the steel pipe and the weight reduction by the resin pipe, so the number of fixing means R can be reduced, Piping work is reduced. In addition, since the pipe body is made of resin, the thermal conductivity is lower than that of a steel pipe. Therefore, since it has heat retention, it is possible to reduce the temperature of water supplied from the water supply pipe without freezing even during watering in winter, and to make a snow-sprinkling sprinkler piping unit with low energy consumption. Can do.

(Embodiment 3)
In the third embodiment, as shown in FIG. 7, a snow-melting panel unit PU using the branch joint A of the above-described embodiment is illustrated. This snow extinguishing panel unit PU is constructed to include a snow extinguishing panel p1, a water supply pipe p5, a reverse pipe p6, a return water pipe p7, a first connecting pipe p8, and a second connecting pipe p9.
The snow extinguishing panel p1 has a substantially rectangular heat radiating plate p2 having a snow receiving surface on the surface, and a twist formed by folding back at the end of the heat radiating plate p2 supported by a support tool p3 on the back surface of the heat radiating plate p2. And a heat radiating pipe p4.

The water supply pipe p5 is composed of the above-described resin pipe B, and is connected to each main pipe connection portion 11c provided at both ends of the branch joint A of any of Embodiments 1 to 5, and the branch of the branch joint A The unit 21 is connected so that water having a required temperature, which is a heat medium sent from a supply source, is branched from the water pipe p5.
The reverse pipe p6 is composed of the above-described resin pipe B, and is connected to the end portion of the return pipe p7 described later at the end portion, so that the reverse water sent from the supply source is supplied. .
The return water pipe p7 consists of the above-mentioned resin pipe B, and is connected to each main pipe connection part 11c provided in the both ends of any branch joint A of Embodiment 1-5, and water is supplied to the reverse pipe p6. The reverse water is supplied, and the water from the snow-dissipating panel p1 supplied (discharged) from the branch portion 21 of the branch joint A is accompanied by the reverse water. Connected back to the supplier.

The first connecting pipe p8 has one end connected to the inlet of the heat radiating pipe p4 and the other end connected to the branch connecting portions 23a, 26a, 25c of the branch joint A connected to the water feeding pipe p5. The water at the required temperature is supplied from p5 to the heat radiating pipe p4 to heat and maintain the heat radiating plate p2 at the required temperature.
The second connecting pipe p9 has one end connected to the outlet of the heat radiating pipe p4 and the other end connected to the branch connecting portions 23a, 26a, and 25c of the branch joint A connected to the return water pipe p7. The water sent from p4 is collected in the return pipe p7.
An adjustment valve p10 is connected to the middle part of the first connecting pipe p8 and the second connecting pipe p9.

The snow-melting panel unit PU configured as described above, for example, lays the snow-breaking panels p1 along the railroad track, and these snow-dissipating panels p1 are connected to the respective snow-quenching panels p1. The first connecting pipe p8 and the second connecting pipe p9 are connected in parallel to the water supply pipe p5 and the reverse pipe p6 connected in a straight line.
And the water supplied from the water supply pipe p5 enters the heat radiating pipe p4 through the first connecting pipe p8, warms the heat radiating plate p2, and collects water in the return water pipe p7 through the second connecting pipe p9. The snow that falls on the heat sink p2 is melted.

  Therefore, the snow-extinguishing panel unit PU using the resin tube B has heat retention because the tube body is made of resin in addition to the advantages of both strength and low expansion / contraction of the steel tube and weight reduction by the resin tube. In addition, the temperature of water supplied from the water pipe can be reduced without freezing even in watering in winter, and energy consumption can be reduced.

  As described above, the branch joint according to the present embodiment, the snow extinguishing sprinkler piping unit using the branch joint, and the snow extinguishing panel unit have been described. However, the above-described embodiment is a preferred embodiment of the present invention. This is an example, and the present invention is not limited thereto, and various modifications can be made without departing from the scope of the invention.

It is a section perspective view of the branch joint concerning this embodiment. It is a cross-sectional perspective view of the composite resin pipe | tube concerning this Embodiment. It is a disassembled perspective view of the branch joint concerning this Embodiment. It is sectional drawing of another branch joint concerning this Embodiment. It is a partial cross section perspective view of the snow extinguishing sprinkler piping unit concerning this Embodiment. It is a top view which shows the construction example of the snow-melting sprinkler piping unit concerning this Embodiment. It is an external view of the snow-melting panel unit concerning this Embodiment.

Explanation of symbols

A ... Branch joint 11 ... Joint body 11a ... Through hole 11b ... Spiral groove 11c ... Main pipe connection part 11d ... Channel hole 11q ... Packing 11r ... Neck part 21 ... Branch part 22 ... Branch pipe 22a ... Ridge part 22b ... Tube part 22c ... male screw 22d ... branch connection portion 23 ... fixture 23b ... female screw 24, 24a, 24b ... sealing means (O-ring) 31 ... heating wire 32 ... metal terminal 41 ... resin film 43 ... correction mask 6 ... reinforcing ring B ... Resin pipe b1 ... Metal plate b2 ... Opening hole b3 ... Pipe body SU ... Snow extinguishing sprinkler piping unit S ... Sprinkler head s1 ... Nozzle s2 ... Base PU ... Snow extinguishing panel unit p1 ... Snow extinguishing panel p2 ... Heat sink p3 ... Support p4 ... radiation pipe p5 ... water pipe p6 ... reverse pipe p7 ... return water pipe p8 ... first connecting pipe p9 ... second connecting pipe p10 ... regulating valve

Claims (6)

A joint body including a joint body provided with a flow path hole for connecting the resin pipes and connecting the resin pipes, and a branch part for branching the flow path to the outside,
The branch portion is
A neck projecting integrally from the joint body;
A branch pipe comprising a cylindrical portion inserted so as to protrude from a through hole in which the flow passage hole and the neck portion of the joint body communicate with each other, and a flange portion engaged with the inner surface of the flow passage hole When,
A fixture that is mounted on the cylindrical portion protruding from the neck of the joint body, and that fixes the branch pipe by sandwiching the joint body with the flange portion;
A branch joint comprising: sealing means for preventing leakage from the through hole to the outside of the joint body.   The joint body is made of thermoplastic resin, the branch pipe and the fixture are made of metal, and the flow passage hole is connected to the main pipe connecting the resin pipe to the end thereof. The at least one main pipe connection portion contains a heating wire spirally wound on the inner peripheral surface, and the main pipe connection portion and the resin pipe are fused by electric heat. The branch joint according to claim 1, wherein the branch joint is configured to be connected.   The branch joint according to claim 1 or 2, wherein a reinforcing ring is fitted on an outer surface of the joint main body corresponding to the fusion portion by the electric heat.   The said fixing tool is screwed together with the upper part of the said cylinder part, and is provided with the branch connection part for connecting an external apparatus or a branch pipe to the said cylinder part. A branch joint according to any one of the above. A branch joint according to claim 4;
A sprinkler head connected to the branch connection portion and sprinkling water while rotating;
A composite resin pipe connected to the main pipe connecting portion and having a tubular metal plate having a plurality of opening holes in the wall thickness of a pipe body having at least an outer peripheral surface made of a thermoplastic resin. ,
A snow-sprinkling sprinkler piping unit, wherein the snow-sprinkling body is sprinkled with water so that snow can be removed. A snow extinguishing panel unit using the branch joint according to claim 4,
A snow-dissipating panel comprising a heat radiating plate having a snow receiving surface on a surface thereof, and a heat radiating pipe disposed on the back surface of the heat radiating plate to flow a heat medium;
A plurality of water pipes that are connected to the main pipe connection section and send the heat medium sent from the supply source to the snow-fusing panel;
A plurality of return water pipes connected to the main pipe connection portion and returning the heat medium discharged from the snow-melting panel to a supply source;
A first connecting pipe having one end connected to the inlet of the heat radiating pipe and the other end connected to the branch connecting portion of the branch joint connected to the water supply pipe;
One end is connected to the outlet of the heat radiating pipe, and the other end includes a second connecting pipe connected to the branch connecting portion of the branch joint connected to the return water pipe. Snow panel unit.

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