CN213693031U - Be used for post-cast strip department stereoplasm fire resistance plastic spool telescoping device - Google Patents

Abstract

The utility model discloses a hard flame-retardant plastic spool expansion device for post-cast strip, which comprises an expansion joint device body, wherein the expansion joint device body comprises a PVC spool, a spool body, two PVC short pipes, an expansion joint spool and a spool groove, the expansion joint spool is arranged between the two PVC short pipes, the hard flame-retardant plastic spool expansion device can effectively protect a pre-embedded spool and prevent the spool from being deformed due to expansion and contraction caused by main structure stress or other external stress and from being damaged, the device comprises a fixed end, the PVC short pipes, the expansion joint spool, a rubber gasket and the like, the whole device is formed by directly processing and bonding the plastic spool and the plastic, and can effectively solve the problem that the spool is stretched due to expansion and contraction in the initial concrete curing process or the spool bears stress at the post-cast strip due to uneven settlement of the main structure or the spool is exposed for a long time at the post-cast strip, the problem of damage to the conduit due to external stress extrusion, collision and the like is easily caused.

Description

Be used for post-cast strip department stereoplasm fire resistance plastic spool telescoping device

Technical Field

The utility model relates to a building electrical pre-buried technical field specifically is a be used for post-cast strip department stereoplasm fire retardant plastic spool telescoping device.

Background

The prefabricated building is a new trend of building development, the prefabricated building construction has higher requirements on the pre-buried precision of the pipeline, the prefabricated building floor slab adopts a laminated plate form, the lower layer is of a prefabricated structure, the upper layer is of a cast-in-place structure, the electromechanical pipeline is pre-buried in the cast-in-place structure, the reserved vertical interface is in butt joint with the pipeline interface reserved in the vertical prefabricated floor slab, and in the electromechanical pre-burying process of the building, the rigid flame-retardant line pipe (usually PVC flame-retardant line pipe) can be used for the whole length.

The traditional process flame-retardant line pipe can be generally formed once when crossing a post-cast strip of a floor and embedded in place, but in the process of engineering practice, the embedded line pipe at the post-cast strip is often reworked due to the fact that the line pipe is damaged by later-stage artificial treading or main concrete expansion and contraction, and therefore a hard flame-retardant plastic line pipe expansion device used at the post-cast strip is provided.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a be used for post-cast strip department stereoplasm fire resistance plastics spool telescoping device to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a be used for post-cast strip department stereoplasm fire resistance plastics spool telescoping device, includes the telescopic joint device body, the telescopic joint device body includes PVC spool, the ferrule body, PVC nozzle stub, telescopic joint ferrule and spool groove, the PVC nozzle stub has two, and is provided with the telescopic joint ferrule between two PVC nozzle stubs, the tip of PVC nozzle stub stretches into inside the telescopic joint ferrule, the one end that the PVC nozzle stub is located telescopic joint ferrule inside is provided with the stiff end, and the PVC nozzle stub passes through the stiff end and is connected with the telescopic joint ferrule, the one end that the PVC nozzle stub is located the telescopic joint ferrule is provided with the ferrule body, and the PVC nozzle stub has the PVC spool through ferrule body coupling.

Preferably, the stiff end includes spool groove and PVC hasp, the one end that the PVC nozzle stub is located telescopic joint ferrule inside is provided with the spool groove, and the cross-section of spool groove becomes the triangle-shaped structure, the outside that the inside PVC nozzle stub that is located of telescopic joint ferrule bonds and has the PVC hasp.

Preferably, the whole PVC lock catch is of a triangular structure, and the triangular bevel edge of the PVC lock catch is arranged towards the groove of the spool.

Preferably, the telescopic joint device body is formed by directly processing and bonding a plastic wire pipe and plastic.

Preferably, annular fixed slots are all seted up at the inside both ends of telescopic joint ferrule, and all bond in the annular fixed slot and have the rubber packing ring, the rubber packing ring is closely laminated with the PVC nozzle stub, the PVC hasp is located between spool groove and the rubber packing ring, the telescopic joint ferrule has formed the expansion end with the cooperation of rubber packing ring.

Preferably, the PVC short pipe and the PVC line pipe are fixedly bonded through a pipe hoop body.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses can effectively protect pre-buried spool, prevent that major structure stress or other external stresses from causing the flexible deformation of spool and producing destruction to it, the telescopic joint device body is by the stiff end, the PVC nozzle stub, telescopic joint ferrule, rubber packing ring etc. are constituteed, whole device is formed by plastics spool and plastics direct processing bonding, can effectively solve to lead to the spool to be stretched because of the expansion and contraction in the concrete initial stage maintenance process, or because of the inhomogeneous settlement of major structure leads to post-cast strip department spool to bear stress, or because of post-cast strip department spool exposes for a long time, receive external stress extrusion easily, cause spool damage problems such as collision.

Drawings

FIG. 1 is a schematic view of the overall connection structure of the present invention;

FIG. 2 is a schematic view of the overall internal connection structure of the present invention;

FIG. 3 is a schematic structural view of an enlarged view at A of the present invention;

fig. 4 is a schematic view of the internal connection structure of the telescopic joint pipe hoop, the PVC short pipe and the rubber gasket of the present invention.

In the figure: 1. PVC wire pipes; 2. a ferrule body; 3. a PVC short pipe; 4. a telescopic joint pipe collar; 5. a pipe groove; 6. a rubber gasket; 7. PVC lock catch; 8. an expansion joint device body; 9. a fixed end; 10. a movable end.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 and fig. 2, the present invention provides a technical solution: a hard flame-retardant plastic spool expansion device for a post-cast strip comprises an expansion joint device body 8, wherein the expansion joint device body 8 comprises a PVC spool 1, a spool body 2, a PVC short pipe 3, an expansion joint spool 4 and a spool groove 5;

the integral arrangement of the expansion joint device body 8 is simple, the processing is simple, the forming cost is low, and the expansion joint device can be widely applied to the electrical pre-embedding process of building construction;

referring to fig. 1 and 2, there are two PVC short pipes 3, and a telescopic joint pipe hoop 4 is disposed between the two PVC short pipes 3, an end of the PVC short pipe 3 extends into the telescopic joint pipe hoop 4, a fixed end 9 is disposed at one end of the PVC short pipe 3 located inside the telescopic joint pipe hoop 4, and the PVC short pipe 3 is connected to the telescopic joint pipe hoop 4 through the fixed end 9;

the expansion joint pipe hoop 4 is arranged at the joint of the two PVC short pipes 3, and the expansion joint pipe hoop 4 is fixedly bonded outside the end parts of the two PVC short pipes 3, so that the connection stability between the two PVC short pipes 3 is enhanced, and meanwhile, the expansion joint pipe hoop 4 is bonded with the PVC short pipes 3, so that the connection cost is greatly reduced;

please refer to fig. 1 and fig. 2, one end of the PVC pipe spool 3 located at the telescopic joint pipe hoop 4 is provided with a pipe hoop body 2, and the PVC pipe spool 3 is connected with a PVC pipe spool 1 through the pipe hoop body 2, the connection between the PVC pipe spool 3 and the PVC pipe spool 1 is facilitated by the arrangement of the pipe hoop body 2, the pipe hoop body 2 is connected to the outside between the PVC pipe spool 3 and the PVC pipe spool 1, the connection between the PVC pipe spool 3 and the PVC pipe spool 1 is reinforced, and meanwhile, the connection cost between the PVC pipe spool 3 and the PVC pipe spool 1 is also lower.

Referring to fig. 2 and 3, the fixing end 9 includes a line pipe groove 5 and a PVC lock catch 7, the line pipe groove 5 is disposed at one end of the PVC short pipe 3 located inside the telescopic joint pipe hoop 4, the cross section of the line pipe groove 5 is a triangular structure, and the PVC lock catch 7 is bonded at the outside of the PVC short pipe 3 located inside the telescopic joint pipe hoop 4.

Referring to fig. 3, the whole PVC lock catch 7 is in a triangular structure, and the triangular bevel edge of the PVC lock catch 7 is disposed toward the conduit groove 5.

Referring to fig. 1, the expansion joint device body 8 is formed by directly processing and bonding a plastic line pipe and plastic;

this telescopic joint device body 8 is by stiff end 9, PVC nozzle stub 3, telescopic joint ferrule 4, rubber packing ring 6 etc. are constituteed, and whole device is formed by the direct processing bonding of plastics spool and plastics, can effectively solve and lead to the spool to be stretched because of the expansion and contraction among the concrete initial stage maintenance process, or because of the uneven settlement of major structure leads to post-cast strip department spool to bear stress, or because of post-cast strip department spool is long-term exposed, receive external stress extrusion easily, collision etc. reason and cause the spool to damage the problem.

Referring to fig. 3 and 4, annular fixing grooves are respectively formed at two ends of the inside of the telescopic joint pipe hoop 4, rubber gaskets 6 are respectively bonded in the annular fixing grooves, and the rubber gaskets 6 are tightly attached to the PVC short pipe 3;

it should be noted that, by forming annular fixing grooves at two ends inside the telescopic joint pipe hoop 4 and bonding the rubber gasket 6 in the annular fixing grooves, the rubber gasket 6 is arranged to have a good sealing effect, the rubber gasket 6 is arranged to enable a certain gap to be formed between the telescopic joint pipe hoop 4 and the PVC short pipe 3, and the rubber gasket 6 is respectively tightly attached to and connected with the PVC short pipe 3 and the telescopic joint pipe hoop 4 to perform better sealing;

meanwhile, the rubber gasket 6 is positioned in a gap between the PVC short pipe 3 and the telescopic joint pipe hoop 4, so that a certain buffering effect is achieved, and the problems that the wire pipe is stretched due to expansion and shrinkage in the initial concrete curing process, or the wire pipe at the post-cast strip is stressed due to uneven settlement of a main body structure, or the wire pipe is damaged due to long-term exposure of the wire pipe at the post-cast strip and is easy to extrude and collide by external stress and the like can be effectively solved;

the PVC lock catch 7 is positioned between the wire tube groove 5 and the rubber gasket 6, and the telescopic joint pipe hoop 4 is matched with the rubber gasket 6 to form a movable end 10;

wherein, the cooperation through rubber packing ring 6 and spool groove 5 has formed the expansion end 10 that is used for the expansion joint, and the one end that is located telescopic joint ferrule 4 inside at PVC nozzle stub 3 sets up a spool groove 5, has made things convenient for the threading process greatly, and the friction between the limit line of this PVC nozzle stub 3 tip and the threading has also been avoided in setting up of spool groove 5 simultaneously, prevents the damage of threading.

Please refer to fig. 2, it is fixed to bond through the ferrule body 2 between PVC nozzle stub 3 and the PVC spool 1, the ferrule body 2 has played fine connection effect between PVC nozzle stub 3 and the PVC spool 1, the setting of the ferrule body 2 has strengthened the connection between PVC nozzle stub 3 and the PVC spool 1 simultaneously, the stability after the connection is guaranteed, it is fixed to bond between the ferrule body 2 and the PVC nozzle stub 3 and the PVC spool 1, greatly reduced the connection cost between the two, only need bond the fixed mounting connection convenient and fast, the production efficiency is improved, the consumption cost is comparatively low, avoid in the past because of the uneven settlement of main structure leads to post-cast strip department spool to bear stress, or because of post-cast strip department spool is exposed for a long time, receive external stress extrusion easily, cause the spool damage problem such as collision.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. The utility model provides a be used for post-cast strip department stereoplasm fire resistance plastics spool telescoping device, includes telescopic joint device body (8), telescopic joint device body (8) include PVC spool (1), ferrule body (2), PVC nozzle stub (3), telescopic joint ferrule (4) and spool groove (5), PVC nozzle stub (3) have two, and are provided with telescopic joint ferrule (4), its characterized in that between two PVC nozzle stub (3): inside the tip of PVC nozzle stub (3) stretched into telescopic joint ferrule (4), the one end that PVC nozzle stub (3) were located telescopic joint ferrule (4) inside was provided with stiff end (9), and PVC nozzle stub (3) are connected with telescopic joint ferrule (4) through stiff end (9), the one end that PVC nozzle stub (3) were located telescopic joint ferrule (4) is provided with the ferrule body (2), and PVC nozzle stub (3) are connected with PVC spool (1) through the ferrule body (2).

2. The flexible device for rigid flame retardant plastic conduit at post-cast strip of claim 1, wherein: stiff end (9) are including spool groove (5) and PVC hasp (7), the one end that PVC nozzle stub (3) are located telescopic joint ferrule (4) inside is provided with spool groove (5), and the cross-section of spool groove (5) becomes the triangle-shaped structure, the outside that telescopic joint ferrule (4) inside is located PVC nozzle stub (3) bonds and has PVC hasp (7).

3. The flexible device for rigid flame retardant plastic conduit at post-cast strip of claim 2, wherein: the whole PVC lock catch (7) is of a triangular structure, and the triangular bevel edge of the PVC lock catch (7) is arranged towards the spool groove (5).

4. The flexible device for rigid flame retardant plastic conduit at post-cast strip of claim 1, wherein: the expansion joint device body (8) is formed by directly processing and bonding a plastic wire pipe and plastic.

5. The flexible device for rigid flame retardant plastic conduit at post-cast strip of claim 2, wherein: annular fixed slots are all seted up at the inside both ends of telescopic joint ferrule (4), and all bond in the annular fixed slot and have rubber packing ring (6), rubber packing ring (6) closely laminate with PVC nozzle stub (3), PVC hasp (7) are located between spool groove (5) and rubber packing ring (6), telescopic joint ferrule (4) have formed expansion end (10) with the cooperation of rubber packing ring (6).

6. The flexible device for rigid flame retardant plastic conduit at post-cast strip of claim 1, wherein: the PVC short pipe (3) and the PVC line pipe (1) are fixedly bonded through the pipe hoop body (2).

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