Post-expansion device and post-expansion method for steel-plastic composite pipe passing through civil airtight casing

Abstract

The present invention discloses a device for expanding a steel-plastic composite pipe after it passes through a civil airtight casing and a method for expanding the pipe after it passes through the casing. The device comprises: a reaction end plate; a support plate having a first through-hole; an expansion plug fixedly mounted on a side of the support plate facing the reaction end plate, the expansion plug having a second through-hole aligned with the first through-hole; a pressure mechanism comprising a plurality of lifting jacks and a connecting beam, the lifting jacks having a fixed end and a telescopic end opposite to each other, the fixed end being connected to a side of the support plate facing away from the reaction end plate, the connecting beam being connected to the telescopic ends of the plurality of lifting jacks; and a tie rope movably mounted through the first through-hole and the second through-hole and tied to the reaction end plate and the connecting beam. The present invention solves the problem that steel-plastic composite pipes cannot be expanded and connected using traditional expansion tools in confined spaces.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, and in particular to a post-expansion device and a post-expansion method for a steel-plastic composite pipe passing through a civil airtight casing. Background Art

[0002] Flaring connections for PSP (plastic-steel-plastic composite pressure pipe) require both ends of the pipe to be flared before installation. The manufacturer's flaring tool can only flare the finished horizontal surface, and the PSP pipe to be flared and the flaring tool must be on the same level. This increases the diameter of the PSP pipe opening, making it impossible to pass through the design-sized enclosure casing for civil defense walls.

[0003] The information disclosed in this background technology section is only intended to enhance understanding of the overall background of the invention and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the Invention

[0004] In order to overcome the defects of the existing technology, a post-expansion device and a post-expansion method for a steel-plastic composite pipe passing through a civil airtight casing are provided to solve the problem that traditional expanding tools cannot be used to expand and connect the steel-plastic composite pipe in a confined space.

[0005] In order to achieve the above purpose, a device for expanding a steel-plastic composite pipe after it passes through a civil airtight casing is provided, comprising:

[0006] A reaction end plate for fitting to the end of the steel-plastic composite pipe away from the end to be expanded;

[0007] A support plate for being arranged at the end of the steel-plastic composite pipe to be expanded, wherein the support plate is provided with a first through-hole;

[0008] An expansion plug for inserting into the end to be expanded, fixedly mounted on a side of the support plate facing the reaction end plate, the expansion plug being provided with a second through-hole aligned with the first through-hole;

[0009] a pressure mechanism comprising a plurality of lifting jacks and a connecting beam, wherein the lifting jacks have a fixed end and a telescopic end opposite to each other, the fixed end being connected to a side of the support plate facing away from the reaction end plate, and the connecting beam being connected to the telescopic ends of the plurality of lifting jacks; and

[0010] The tie rope used to be passed through the steel-plastic composite pipe can be movably passed through the first through-hole and the second through-hole and tied to the reaction end plate and the connecting beam. After the multiple lifting jacks are extended, the lifting jacks press against the support plate to allow the expansion plug to expand the diameter of the end to be expanded.

[0011] Furthermore, the lifting jack is arranged along the axial direction of the steel-plastic composite pipe.

[0012] Furthermore, a plurality of the lifting jacks are respectively arranged on two opposite sides of the first through hole.

[0013] Furthermore, the number of the lifting jacks is two, and the two lifting jacks are symmetrically arranged on opposite sides of the first through-hole.

[0014] Furthermore, the expansion plug includes a guide section and an expansion section, the expansion section having a first end and a second end relative to each other, the first end of the expansion section being fixedly connected to the support plate, the outer diameter of the expansion section gradually decreasing from the first end of the expansion section to the second end of the expansion section, the guide section being connected to the second end of the expansion section, and the outer diameter of the guide section being adapted to the second end of the expansion section and the inner diameter of the steel-plastic composite pipe.

[0015] Furthermore, the tie rope is a steel wire rope.

[0016] Furthermore, the lifting jack is a screw jack.

[0017] The present invention provides a method for expanding a steel-plastic composite pipe after it passes through a civil airtight casing, comprising the following steps:

[0018] Pass the steel-plastic composite pipe through the airtight casing;

[0019] Provide a post-expansion device for the steel-plastic composite pipe after it passes through the airtight casing of the civil air defense system, and pass the tie rope through the steel-plastic composite pipe;

[0020] Inserting the expansion plug into the end of the steel-plastic composite pipe to be expanded, and attaching the reaction end plate to the end of the steel-plastic composite pipe away from the end to be expanded;

[0021] Tie the two ends of the tie rope to the reaction end plate and the connecting beam respectively;

[0022] The lifting jack is extended to press against the support plate, thereby causing the expansion plug to squeeze and expand the diameter of the end to be expanded.

[0023] The beneficial effect of the present invention is that the expansion device for the steel-plastic composite pipe after passing through the civil air-defense sealed casing can extrude and expand the pipe mouth of the steel-plastic composite pipe after the steel-plastic composite pipe passes through the civil air-defense sealed casing, so that the pipe mouth of the steel-plastic composite pipe can be expanded at a construction site with limited space, thereby improving the installation and construction efficiency of the steel-plastic composite pipe and reducing construction costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Other features, objects and advantages of the present application will become more apparent upon reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0025] Figure 1 This is a structural schematic diagram of the expansion device after the steel-plastic composite pipe passes through the civil airtight casing according to an embodiment of the present invention.

[0026] Figure 2 Schematic diagram of the connection between the steel-plastic composite pipe and the expansion plug according to an embodiment of the present invention.

[0027] Figure 3 This is a schematic diagram of the steel-plastic composite pipe after expansion according to an embodiment of the present invention. DETAILED DESCRIPTION

[0028] The present application will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the relevant invention and are not intended to limit the invention. It should also be noted that, for ease of description, only portions relevant to the invention are shown in the accompanying drawings.

[0029] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0030] Reference Figures 1 to 3 As shown, the present invention provides a device for expanding a steel-plastic composite pipe after it passes through a civil airtight casing, comprising: a reaction end plate 1, a support plate 2, an expansion plug 3, a pressure mechanism 4 and a tie rope 5.

[0031] When expanding one end of the steel-plastic composite pipe, the reaction end plate 1 is used to fit the end of the steel-plastic composite pipe 7 away from the end to be expanded; the support plate 2 is used to be arranged on the end to be expanded of the steel-plastic composite pipe 7. The support plate 2 is provided with a first through hole.

[0032] An expansion plug 3 for being inserted into the end to be expanded is fixedly mounted on a side of the support plate 2 facing the reaction end plate 1 , and the expansion plug 3 is provided with a second through hole aligned with the first through hole.

[0033] The pressure mechanism 4 includes multiple lifting jacks 41 and a connecting beam 42. Each lifting jack 41 has a fixed end and a telescopic end. The fixed end of each lifting jack 41 is connected to the side of the support plate 2 facing away from the reaction end plate 1. The connecting beam 42 is connected to the telescopic ends of each lifting jack 41.

[0034] The tie rope 5 can be movably passed through the first through hole and the second through hole, and two ends of the tie rope 5 are tied to the reaction end plate 1 and the connecting beam 42 respectively.

[0035] When expanding the opening of a steel-plastic composite pipe, a tie rope 5 is threaded through the steel-plastic composite pipe 7, with the ends of the tie rope 5 respectively tied to the reaction end plate 1 and the connecting beam 42. The extension of the lifting jacks 41 is then controlled. After the multiple lifting jacks 41 are extended, they press against the support plate 2, causing the expansion plug 3 to squeeze and expand the sidewall of the steel-plastic composite pipe, thereby increasing the inner diameter of the end of the steel-plastic composite pipe to be expanded.

[0036] The expansion device for the steel-plastic composite pipe after passing through the civil air-defense sealed casing of the present invention can extrude and expand the pipe mouth of the steel-plastic composite pipe after the steel-plastic composite pipe passes through the civil air-defense sealed casing, so that the pipe mouth of the steel-plastic composite pipe can be expanded at a construction site with limited space, thereby improving the installation and construction efficiency of the steel-plastic composite pipe and reducing construction costs.

[0037] In this embodiment, the first through-hole and the second through-hole are respectively coaxially arranged with the steel-plastic composite pipe.

[0038] The reaction end plate and support plate are square steel plates. The support plate has a thickness of δ = 10 mm and measures 500 mm x 500 mm. The reaction end plate is a 350 mm x 350 mm steel plate with a thickness of δ = 10 mm. A 10 mm diameter hole (the first perforation) is drilled in the center of both plates to allow the tie cable to pass through.

[0039] As a preferred embodiment, the expansion plug 3 includes a guide section 32 and an expansion section 31. The expansion section 31 of the expansion plug 3 has opposing first and second ends. The expansion section 31 is truncated cone-shaped. The first end of the expansion section 31 is fixedly connected to the support plate 2. The outer diameter of the expansion section 31 gradually decreases from the first end to the second end. The guide section 32 is connected to the second end of the expansion section 31. The outer diameter of the guide section 32 matches the second end of the expansion section 31 and the inner diameter of the steel-plastic composite pipe 7.

[0040] like Figure 2 As shown, before expanding the steel-plastic composite pipe, the guide section of the expansion plug is inserted into the end of the steel-plastic composite pipe to be expanded. Figure 3As shown, after the telescopic end of the lifting jack is extended, the expansion plug gradually approaches the direction of the reaction end plate, so that the side of the expanded section is squeezed and expanded toward the inner wall of the end to be expanded of the steel-plastic composite pipe, thereby expanding the inner diameter of the port of the steel-plastic composite pipe.

[0041] In this embodiment, the lifting jacks 41 are arranged along the axial direction of the steel-plastic composite pipe 7. A plurality of lifting jacks 41 are respectively arranged on two opposite sides of the first through hole.

[0042] Preferably, there are two lifting jacks 41. The two lifting jacks 41 are symmetrically arranged on opposite sides of the first through hole.

[0043] As a preferred embodiment, the lifting jack 41 is a screw jack.

[0044] As a preferred embodiment, the tie rope 5 is a steel wire rope.

[0045] Before the steel-plastic composite pipe passes through the airtight casing 81 for civil air defense in the concrete structural wall 8, one end of the steel-plastic composite pipe can be expanded. After the expansion of one end of the steel-plastic composite pipe, the unexpanded end of the steel-plastic composite pipe is passed through the airtight casing for civil air defense. After the unexpanded end of the steel-plastic composite pipe passes through the airtight casing for civil air defense, the unexpanded end of the steel-plastic composite pipe is expanded using the expansion device after the steel-plastic composite pipe passes through the airtight casing for civil air defense.

[0046] On the other hand, the present invention provides a method for expanding a steel-plastic composite pipe after passing through a civil airtight casing, comprising the following steps:

[0047] S1: Pass the steel-plastic composite pipe 7 through the civil airtight casing 81.

[0048] S2: Provide a device for expanding the steel-plastic composite pipe after it passes through the airtight casing of the civil air defense system, and pass the tie rope 5 through the steel-plastic composite pipe 7.

[0049] S3: inserting the expansion plug 3 into the end of the steel-plastic composite pipe 7 to be expanded, and fitting the reaction end plate 1 to the end of the steel-plastic composite pipe 7 away from the end to be expanded.

[0050] S4: Tie the two ends of the tie rope 5 to the reaction end plate 1 and the connecting beam 42 respectively.

[0051] S5: The lifting jack 41 is extended to press against the support plate 2, thereby causing the expansion plug 3 to squeeze and expand the diameter of the end to be expanded.

[0052] The expanded steel-plastic composite pipe must be free of burrs, damaging cracks, and dirt. The expanded steel-plastic composite pipe should be installed as soon as possible and installed on the same day to avoid internal plastic delamination.

[0053] In the present invention, the PSP steel-plastic composite pipe is first passed through the civil defense wall and then expanded. The expanding device for the steel-plastic composite pipe after passing through the civil defense closed casing of the present invention effectively solves the problem of fast and efficient expansion construction of the steel-plastic composite pipe under limited space. The tools are simple, the construction difficulty is low, and it is safe and reliable.

[0054] The above description is merely a preferred embodiment of the present application and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of the invention herein is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the inventive concept. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features having similar functions disclosed in this application.

Claims

1. A method for expanding a steel-plastic composite pipe after passing through a civil airtight casing, characterized in that: The following steps are involved: Pass the steel-plastic composite pipe through the airtight casing; A device for expanding a steel-plastic composite pipe after it passes through a civil airtight casing is provided, wherein the device comprises a reaction end plate for fitting to an end of the steel-plastic composite pipe away from the end to be expanded; a support plate for being arranged at the end to be expanded of the steel-plastic composite pipe, the support plate being provided with a first through-hole; an expansion plug for being inserted into the end to be expanded, the expansion plug being fixedly arranged on a side of the support plate facing the reaction end plate, the expansion plug being provided with a second through-hole aligned with the first through-hole; a pressure mechanism comprising a plurality of lifting jacks and a connecting beam, the lifting jacks having a fixed end and a telescopic end opposite to each other, the fixed end being connected to a side of the support plate facing away from the reaction end plate, and the connecting beam being connected to the telescopic ends of the plurality of lifting jacks; and a tie rope for passing through the steel-plastic composite pipe, which can be movably passed through the first through-hole and the second through-hole and tied to the reaction end plate and the connecting beam. After the plurality of jacking jacks are extended, the jacking jacks press against the support plate to cause the expansion plug to expand the diameter of the end to be expanded, thereby passing the tie rope through the steel-plastic composite pipe; Inserting the expansion plug into the end of the steel-plastic composite pipe to be expanded, and attaching the reaction end plate to the end of the steel-plastic composite pipe away from the end to be expanded; Tie the two ends of the tie rope to the reaction end plate and the connecting beam respectively; The lifting jack is extended to press against the support plate, thereby causing the expansion plug to squeeze and expand the diameter of the end to be expanded.

2. The method for expanding the steel-plastic composite pipe after passing through the airtight casing of civil air defense according to claim 1 is characterized in that: The lifting jack is arranged along the axial direction of the steel-plastic composite pipe.

3. The method for expanding the steel-plastic composite pipe after passing through the airtight casing of civil air defense according to claim 1 is characterized in that: The plurality of lifting jacks are respectively arranged on two opposite sides of the first through hole.

4. The method for expanding the steel-plastic composite pipe after passing through the airtight casing according to claim 3 is characterized in that: There are two lifting jacks, and the two lifting jacks are symmetrically arranged on opposite sides of the first through hole.

5. The method for expanding the steel-plastic composite pipe after passing through the airtight casing of civil air defense according to claim 1 is characterized in that: The expansion plug includes a guide section and an expansion section, the expansion section has a first end and a second end opposite to each other, the first end of the expansion section is fixedly connected to the support plate, the outer diameter of the expansion section gradually decreases from the first end of the expansion section to the second end of the expansion section, the guide section is connected to the second end of the expansion section, and the outer diameter of the guide section is adapted to the second end of the expansion section and the inner diameter of the steel-plastic composite pipe.

6. The method for expanding the steel-plastic composite pipe after passing through the airtight casing of civil air defense according to claim 1 is characterized in that: The tie rope is a steel wire rope.

7. The method for expanding the steel-plastic composite pipe after passing through the airtight casing of civil air defense according to claim 1 is characterized in that: The lifting jack is a screw jack.

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