JP5384022B2 - Pipe joint protective cover and pipe joint protective structure - Google Patents

Description

  The present invention relates to a pipe joint protective cover for protecting a pipe joint for connecting a plurality of pipes, and a pipe joint protection structure using the pipe joint protective cover.

  Normally, when water pipes are drawn into houses, pipes buried in the soil (for example, PVC pipes) are raised to the ground, and are connected to indoor pipes (for example, polybutene pipes) and pipe joints. It is connected. However, depending on the situation, it is necessary to connect the PVC pipe and the polybutene pipe in the soil. In this case, since the pipe joint is buried in the soil, the pipe joint may be deteriorated by moisture, oil, etc. in the soil. For this reason, waterproofing measures may be taken by winding waterproof tape around the pipe joint and the connecting part between the pipe joint and the pipe. However, the waterproof tape cannot completely prevent moisture from entering, and it is also assumed that the pipe joint and the connection part between the pipe joint and the pipe are damaged when dug up.

On the other hand, in patent document 1, the coupling which connected piping covered with the underground pipe | tube for underground burial is protected using the protective cover which can be divided into 2 parts up and down. This protective cover prevents the intrusion of moisture into the protective cover by interposing a sealing material between the joint portion of the upper cover main body and the lower cover main body and between the underground pipe for underground and each cover main body. .
Japanese Utility Model Publication No. 7-35879

  However, in the protective cover of Patent Document 1, the portion into which the underground pipe for embedding is inserted is divided into upper and lower portions, that is, the sealing material is also divided into upper and lower portions. However, there is a problem that sufficient waterproof performance cannot be secured.

  In view of the above, an object of the present invention is to provide a pipe joint protection cover that protects a pipe joint and ensures sufficient waterproof performance, and a pipe joint protection structure using the pipe joint protection cover.

In order to achieve the above object, the pipe joint protective cover according to claim 1 is configured by connecting a plurality of divided bodies, and a cover body capable of accommodating therein a pipe joint for connecting a plurality of pipes. A pipe insertion part provided in the divided body and capable of inserting the pipe; and a pipe insertion part provided in the pipe insertion part, closely contacting an outer peripheral surface of the inserted pipe and between the pipe and the pipe insertion part. And a water stop member for sealing, and a locking portion for locking a pipe protection cover that covers the pipe is provided on the outer peripheral surface of the divided body .

  In the pipe joint protective cover according to the first aspect, the pipe joint is accommodated in a main body cover configured by connecting a plurality of divided bodies. Thereby, a pipe joint is protected by a main body cover. As a result, it is possible to prevent the pipe joint from being damaged by an impact such as when dug up.

  Moreover, the pipe inserted in the pipe insertion part is connected to the pipe joint. A water stop member is in close contact with the outer peripheral surface of the inserted pipe, and a gap between the pipe and the pipe insertion portion is sealed. This prevents fluid (water, oil, etc.) from entering the main body cover from the outside.

  Furthermore, in the pipe joint protective cover of the present invention, at least one pipe insertion portion is provided in each divided body, and the main body cover is configured (formed) by connecting a plurality of divided bodies. The insertion part is not divided. That is, the pipe joint protective cover of the present invention is superior in waterproof performance than the conventional one.

In the pipe joint protective cover according to the first aspect , the pipe protective cover that covers and protects the pipe is locked to the locking portion provided on the outer peripheral surface of the divided body. Thereby, it is prevented that the gap between the pipe protection cover and the cover main body becomes large due to an impact at the time of digging, and the pipe and the pipe joint are effectively protected from the impact.

The pipe joint protection structure according to claim 2 is provided with a pipe joint in which a plurality of pipes are connected and the pipe joint protection cover according to claim 1 in which the pipe joint is housed. .

In the pipe joint protection structure according to claim 2 , the pipe joint in which a plurality of pipes are connected is housed and protected in the pipe joint protective cover, and fluid intrusion into the pipe joint protective cover is prevented. Therefore, damage and deterioration of the pipe joint are prevented.

  As described above, according to the pipe joint protective cover of the present invention, the pipe joint can be protected and sufficient waterproof performance can be ensured. Moreover, according to the pipe joint protection structure of the present invention, it is possible to prevent the pipe joint from being damaged due to an impact and deterioration of the pipe joint due to fluid intrusion.

(First embodiment)
Hereinafter, a pipe joint protection cover of the present invention and a first embodiment of a joint protection structure using this pipe joint protection cover will be described in detail with reference to the drawings. First, the pipe joint 12 protected using the pipe joint protective cover 30 of the first embodiment and the pipe connected by the pipe joint 12 will be described in detail. In addition, the pipe joint protection structure 10 of this embodiment is comprised by the pipe joint protective cover 30 and the pipe joint 12. FIG.

(Fittings and piping)
In FIG. 1, the pipe joint 12 covered and protected by the pipe joint protective cover 30 is indicated by a broken line. The pipe joint 12 is a straight joint that connects one pipe P1 and the other pipe P2. In this embodiment, since the pipe P1 is set as a polyvinyl chloride pipe and the pipe P2 is set as a polybutene pipe, the pipe joint 12 is a different diameter pipe joint. This is because the PVC pipe and the polybutene pipe have the same nominal diameter but have different outer diameters and inner diameters. Moreover, since the pipe P1 and the pipe P2 are embedded in the soil, they are covered with pipe protective covers 21 and 22 on the bellows having flexibility. In this embodiment, the pipe P1 is a polyvinyl chloride pipe and the pipe P2 is a polybutene pipe. However, the present invention is not limited to this configuration, and the pipe P1 and the pipe P2 are made of conventionally known materials. can do. Further, in this embodiment, the pipe joint 12 is configured to connect a PVC pipe and a polybutene pipe having the same nominal diameter. However, the present invention is not limited to this configuration, and pipes of the same type and the same nominal diameter are connected to each other. It is good also as a structure to connect, and it is good also as a structure which connects the piping of the same kind but different nominal diameter. That is, any conventionally known joint may be used as long as a plurality of pipes can be connected.

(Fitting protective cover)
As shown in FIG. 1, the pipe joint protective cover 30 includes a cover body 31 configured (formed) by connecting three divided bodies. The cover body 31 is sized to accommodate the pipe joint 12 therein. In the present embodiment, among the three divided bodies constituting the cover main body 31, the substantially cylindrical divided body located in the center is connected to the central divided part 32 and the pipe P1 side of the central divided part 32. A substantially cylindrical divided body connected to the pipe P <b> 2 side of the first divided part 34 and the central divided part 32 is referred to as a second divided part 36. These divided parts are connected to each other by screwing a male screw and a female screw. In the present embodiment, the male screw 32A is provided at both ends in the axial direction of the central split part 32 with the male split 32A in the axial direction of the first split part 34, as shown in FIG. The female screw 34A provided at the end portion on the part 32 side and the female screw 36A provided on the end portion on the central divided part 32 side in the axial direction of the second divided part 36 are respectively screwed together. In other embodiments, the central divided part 32 may be formed with a female screw, the first divided part 34 and the second divided part 36 may be formed with a male screw, and the divided parts may be connected. A male screw and a female screw are formed in the first divided part 34 and the second divided part, and a male screw or a male screw corresponding to the male screw or the female screw formed in the central divided part is formed and the divided parts are connected. Good.

  As shown in FIGS. 1 and 3 to 5, the end of the first divided part 34 on the opposite side to the female screw 34 </ b> A is a pipe insertion part 44 into which the pipe P <b> 1 can be inserted. An annular insertion groove 45 is provided on the inner peripheral surface of the pipe insertion portion 44, and an annular O-ring 54 as a water stop member is inserted into the insertion insertion groove 45. The inner diameter of the O-ring 54 is set to be smaller than the outer diameter of the pipe P1, and when the pipe P1 passes through the inside of the O-ring 54, the inner peripheral surface of the O-ring 54 comes into close contact with the outer peripheral surface of the pipe P1. The space between the pipe insertion portion 44 and the pipe P1 is sealed.

  Similarly, the end of the second divided part 36 on the opposite side to the female screw 36A is a pipe insertion part 46 into which the pipe P2 can be inserted. An annular insertion groove 47 is provided on the inner peripheral surface of the pipe insertion portion 46, and an annular O-ring 56 as a water stop member is inserted into the insertion insertion groove 47. The inner diameter of the O-ring 56 is set to be smaller than the outer diameter of the pipe P2. When the pipe P2 is inserted inside the O-ring 56, the inner peripheral surface of the O-ring 56 is in close contact with the outer peripheral surface of the pipe P2. The space between the pipe insertion portion 46 and the pipe P2 is sealed.

  Further, as shown in FIG. 1, the central divided part 32 is formed with a cylindrical pipe insertion portion 42 into which the pipe P2 can be inserted in a direction orthogonal to the axial direction. An annular fitting groove 43 is provided on the inner peripheral surface of the pipe insertion portion 42, and an annular O-ring 52 as a water stop member is fitted into the fitting insertion groove 43. The inner diameter of the O-ring 52 is set to be smaller than the outer diameter of the pipe P2. When the pipe P2 is inserted inside the O-ring 52, the inner peripheral surface of the O-ring 52 is brought into close contact with the outer peripheral surface of the pipe P2. The space between the pipe insertion portion 46 and the pipe P2 is sealed. In addition, in this embodiment, since the straight type pipe joint 12 is used, the piping insertion part 42 of the center division | segmentation part 32 is made unnecessary, and is obstruct | occluded with the cap 50 as a cover body. The cap 50 is made of elastically deformable rubber, and is set to a size such that the outer peripheral surface of the portion inserted into the pipe insertion portion 42 is in close contact with the inner peripheral surface of the pipe insertion portion 42. As another configuration of the cap 50, an O-ring is provided at a portion inserted into the pipe insertion portion 42, and the outer peripheral surface of the O-ring and the inner peripheral surface of the pipe insertion portion 42 are brought into close contact with each other. It may be configured to be closed, and a male screw or a female screw is formed in a portion inserted into the pipe insertion portion 42, a female screw or a male screw is formed on the inner peripheral surface of the pipe insertion portion 42, and these are screwed together to form the pipe insertion portion 42. It may be configured to block the Moreover, it is good also as a structure which makes the cap 50 into a cylindrical body, and close | closes the piping insertion part 42 by sticking an outer peripheral surface to the O-ring 52.

  In addition, protrusions 62, 64, and 66 serving as locking portions are provided on the outer peripheral surface of each pipe insertion portion at intervals in the circumferential direction of each pipe insertion portion. As shown in FIG. 3, the protrusion 64 provided on the pipe insertion portion 44 can be fitted (hooked) into the concave portion inside the bellows-like pipe protective cover 21 of the pipe P <b> 1. Similarly, the projection 66 provided in the pipe insertion portion 46 is adapted to be fitted (hooked) into the concave portion inside the bellows-like pipe protection cover 22 of the pipe P2. In the present embodiment, the pipe insertion portion 42 closed by the cap 50 is also provided with a protrusion 62, and this protrusion 62 can be fitted into the concave portion inside the bellows-like pipe protective cover 22 of the pipe P2 (hanging). Is).

  In addition, the shape of the outer peripheral surface of each divided part is set so that the outer peripheral surface of the cover body 31 is a continuous curved surface in a state where the three divided parts are connected. Further, when the divided parts are connected, an engagement protrusion 70 that can prevent screwing from being loosened and an engagement protrusion 72 that engages with the engagement protrusion 70 can be determined. It is formed in divided parts.

(Construction procedure)
Next, the construction procedure when the pipe joint 12 is covered and protected using the pipe joint protective cover 30 will be described. First, the pipe joint protective cover 30 is disassembled (divided) into divided parts. Next, the pipe P1 embedded in the soil is inserted into the pipe insertion portion 44 of the first divided part 34, and the protrusion 64 is fitted (hanged) into the concave portion inside the bellows-like pipe protection cover 22 covering the pipe P1. ). As a result, the inner peripheral surface of the O-ring 54 is brought into close contact with the outer peripheral surface of the pipe P1, the space between the pipe insertion portion 44 and the pipe P1 is sealed, and the pipe protection cover 21 is caught by the protrusion 64, so that an impact or the like occurs. Even when added to the pipe protective cover 21 or the pipe joint protective cover 30, the connection between the pipe protective cover 21 and the pipe joint protective cover 30 is maintained.

Next, the pipe P <b> 1 is connected to the pipe joint 12. Then, the male screw 32A of the central divided part 32 is screwed into the female screw 34A of the first divided part 34 so as to accommodate the pipe joint 12 therein, and these divided parts are connected.
Then, the pipe P2 embedded in the soil or before being embedded in the soil is inserted into the pipe insertion portion 46 of the second divided part 36, and the concave portion inside the bellows-like pipe protection cover 22 covering the pipe P2 is inserted. The protrusion 66 is fitted (hooked). As a result, the inner peripheral surface of the O-ring 56 is in close contact with the outer peripheral surface of the pipe P2, the space between the pipe insertion portion 46 and the pipe P2 is sealed, and the pipe protection cover 22 is caught by the protrusion 66, so that an impact or the like occurs. Even if added to the pipe protection cover 22 or the pipe joint protection cover 30, the connection between the pipe protection cover 22 and the pipe joint protection cover 30 is maintained.

  Thereafter, the pipe P2 is connected to the pipe joint 12, and the female screw 36A of the second divided part 36 is screwed into the male screw 32A of the central divided part 32 to connect these divided parts. Thereby, the pipe joint 12 is accommodated in the pipe joint protective cover 30 and protected. The cap 50 may be attached at any timing before, during, and after assembling the pipe joint protective cover 30.

  As described above, since the pipe joint 12 is protected by the pipe joint protective cover, the pipe joint 12 is prevented from being damaged by an impact such as when dug up. A part of each of the pipe P1 and the pipe P2 accommodated in the pipe joint protective cover 30 is also protected by the pipe joint protective cover. In addition, since the O-ring 54 and the O-ring 56 are respectively provided in the pipe insertion portion 44 into which the pipe P1 is inserted and the pipe insertion portion 46 into which the pipe P2 is inserted, pipe joint protection from the outside (under the ground). Intrusion of fluid (water, oil, etc.) into the cover 30 through the pipe insertion portion 44 and the pipe insertion portion 46 is prevented.

  As a result, the pipe joint protective cover 30 can protect the pipe joint 12 and ensure sufficient waterproof performance. And the pipe joint protection structure 10 using a pipe joint protective cover can prevent the pipe joint 12 from being damaged due to an impact and the deterioration of the pipe joint 12 due to intrusion of fluid.

  Even if an impact or the like is applied, the connection between the pipe protection cover 21 and the pipe protection cover 22 and the pipe joint protection cover 30 is maintained by the protrusions 64 and 66, so that the pipe P1, the pipe P2, and the pipe joint 12 are maintained. Is prevented from being damaged. Further, in the present embodiment, since the divided parts are connected by screwing of the male screw and the female screw, the division (disassembly) or assembling work of the cover body 31 is simplified.

  And in this embodiment, since the pipe insertion part 42 which is not used is obstruct | occluded with the cap 50, permeation of the fluid from the pipe insertion part 42 is prevented. Further, since the outer peripheral surface of the cover main body 31 is a continuous curved surface, the pressure is effectively dispersed even if pressure (impact) acts on the outer peripheral surface, and the cover main body 31, that is, the pipe joint protective cover 30. Damage is prevented.

  Further, in this embodiment, the straight-type pipe joint 12 is protected by using the pipe joint protection cover 30, but the present invention is not limited to this configuration, and as shown in FIG. The cover 30 may protect the T-shaped pipe joint 82 (a joint that can connect one pipe P1 and two pipes P2). In this case, the pipe insertion part 42 is not closed with the cap 50 as in the first embodiment, but the pipe P2 is inserted into the pipe insertion part 42 and connected to the pipe joint 82, and the other pipes P1 and P2 are connected. The pipes P <b> 1 and P <b> 2 can be coupled via the pipe joint 82 by being inserted into the pipe insertion portions 44 and 46 and connected to the pipe joint 82. Of course, as in the first embodiment, the pipe joint protective cover 30 can prevent fluid from entering the inside.

  Further, when protecting the L-shaped pipe joint (a joint that can connect one pipe P1 and one pipe P2) with the pipe joint protective cover 30, the pipe insertion portion 46 is closed with the cap 50, and the pipe P2 is inserted into the pipe insertion part 42 and connected to the L-shaped pipe joint, and the pipe P1 is inserted into the pipe insertion part 44 and connected to the L-shaped pipe joint. The pipe P1 and the pipe P2 can be connected via each other. Of course, as in the first embodiment, the pipe joint protective cover 30 can prevent fluid from entering the inside.

  Therefore, the pipe joint protective cover 30 of the present invention can be used for various pipe joints by closing unused pipe insertion portions with the cap 50 according to the shape of the pipe joint (straight type, L type, T shape). Can be matched. As a result, even if the shape of the pipe joint is suddenly changed at the site, it can be immediately handled at the site, and the construction period can be shortened.

  For example, when protecting the straight type pipe joint which connects the pipes P1 with the pipe joint protective cover of the present invention, the first divided part 34 is connected to both sides of the central divided part 32 in the axial direction, and the main body. By configuring the cover, it is possible to correspond to a straight pipe joint that connects the pipes P1 to each other.

  Furthermore, in the first embodiment, the cover body 31 is configured by connecting three divided parts. However, the present invention is not limited to this configuration, and as shown in FIG. The cover main body 39 may be configured by connecting the third divided part 38 and the second divided part 36 integrally formed with the central divided part. In this case, the number of parts of the cover body can be reduced.

  In the first embodiment, the cover main body 31 is configured by connecting three divided parts. However, the present invention is not limited to this configuration, and a plurality of divided parts corresponding to the central divided part are used. It shall be good. In this case, the pipe joint protection structure of the present invention can also be applied to pipe joints (for example, pipe headers) that branch into a plurality of branches.

  In the above-described embodiment, for example, the space between the pipe joint 12 and the pipe joint protective cover 30 is hollow. However, the present invention is not limited to this configuration, and the pipe joint 12 and the pipe joint protective cover 30 It is assumed that an impact absorbing material (for example, a cushion material such as a rubber piece or sponge) that absorbs an impact may be disposed (accommodated). In this case, even if an impact at the time of digging is applied to the pipe joint protective cover 30, the shock absorber absorbs the shock, so that the pipe joint 12 and the pipes P1 and P2 in the pipe joint protective cover 30 are damaged. It is prevented.

  Moreover, you may comprise the cover main body 31 with a transparent or semi-transparent resin material. Note that the transparency (light transmittance) of the cover main body 31 at this time is desirably a level at which the pipe joint 12 and the pipes P1 and P2 can be visually recognized through the cover main body 31. When a transparent or translucent resin material is used for the cover main body 31, the state of the pipe joint 12 and the connection state between the pipe joint 12 and the pipe P1 and the pipe P2 can be visually confirmed, so that the maintainability is improved. To do.

  The embodiments of the present invention have been described above with reference to the embodiments. However, these embodiments are merely examples, and various modifications can be made without departing from the scope of the invention. It goes without saying that the scope of rights of the present invention is not limited to these embodiments.

It is a perspective view which shows the piping protection structure of 1st Embodiment of this invention. It is sectional drawing which shows the screw structure of the connection part of the pipe joint protective cover of 1st Embodiment. It is sectional drawing which shows the state by which the piping cover was mounted | worn with the pipe joint protective cover. It is the sectional view on the AA line of FIG. It is the BB sectional view taken on the line of FIG. It is a modification of the piping protection structure of this invention. It is a modification of the pipe joint protective cover of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Pipe joint protective structure 12, 82 Pipe joint 21 Pipe protective cover 22 Pipe protective cover 30 Pipe joint protective cover 31 Cover main body 32 Center divided parts (divided body)
34 Divided parts
36 Divided parts
38 Divided parts
42, 44, 46 Piping insertion part 50 Cap (lid)
52, 54, 56 O-ring (water stop member)
62, 64, 66 Protrusion (locking part)

Claims (2)

A cover body that is configured by connecting a plurality of divided bodies and that can accommodate therein a pipe joint for connecting a plurality of pipes;
A pipe insertion portion provided in the divided body and capable of inserting the pipe;
A water stop member that is provided in the pipe insertion portion and seals between the pipe and the pipe insertion portion in close contact with the outer peripheral surface of the inserted pipe;
Equipped with a,
The pipe joint protective cover according to claim 1, wherein a locking portion for locking a pipe protective cover that covers the pipe is provided on an outer peripheral surface of the divided body . A pipe joint in which a plurality of pipes are connected;
The pipe joint protective cover according to claim 1, wherein the pipe joint is housed inside,
A pipe joint protection structure comprising:

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