Plastic electric melting pipe fitting with telescopic function and pipeline mounting assembly

Abstract

The invention discloses a plastic electric melting pipe fitting with a telescopic function and a pipeline mounting assembly, the plastic electric melting pipe fitting comprises a pipe fitting body and a sliding sleeve part, the pipe fitting body comprises a first end, an annular groove part is formed in the inner circumference of the pipe fitting body, the sliding sleeve part is embedded in the annular groove part, and the sliding sleeve part can be adjusted in the annular groove part in a sliding mode; a first heating copper wire is arranged on the inner circumference of the sliding sleeve piece, a first wiring electrode is arranged on the outer circumference of the first end of the pipe fitting body, and the first wiring electrode is electrically connected with the first heating copper wire. According to the plastic electric smelting pipe fitting, connection between two pipe fittings can be achieved, a rubber expansion joint in a conventional pipeline can be replaced, and the situation that the service life of the whole pipeline is affected due to aging and short service life of the rubber expansion joint is avoided; and moreover, in the connecting process of the pipelines, the rubber expansion joints can be reduced or even eliminated, the pipelines can be conveniently assembled and connected, and the mounting efficiency is higher.

Description

Technical Field

[0001] The present invention relates to the field of plastic products, and more specifically, to a plastic electrofusion fitting with a telescopic function, and also to a pipeline installation assembly using the plastic electrofusion fitting. Background Art

[0002] The comfort and durability of buildings have become the focus of the pursuit of human living quality. High-density polyethylene (HDPE) building drainage pipes have gradually become the preferred building drainage materials for high-end buildings due to their environmental protection, hygiene, long service life, aging resistance, and excellent sealing performance. There are a large number of vertically installed pipes in HDPE building drainage pipes, and pipe clamps are required to fix the pipes and keep them firmly in place without displacement. However, with the change of ambient temperature, the expansion and contraction amount of such pipes due to thermal expansion and contraction is relatively large. After installation, the pipes cannot expand and contract, and often the pipe expansion and contraction break the pipe clamps, resulting in the pipes falling off and causing damage to the entire pipeline.

[0003] In order to solve the above technical problems, in current pipelines, a rubber expansion joint is usually installed between the pipes, and the elastic amount of the rubber expansion joint is used to buffer and offset the expansion and contraction amount of the pipes. However, compared with the pipes, the rubber expansion joint is more prone to aging and has a shorter service life. After long-term use, problems such as asynchronous aging life are likely to occur, resulting in a shortened aging time and service life of the entire pipeline.

[0004] Therefore, a new solution is needed to solve the above technical problems. Summary of the Invention

[0005] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art and provide a plastic electrofusion fitting with a telescopic function and a pipeline installation assembly.

[0006] To achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A plastic electrofusion fitting with a telescopic function includes a fitting body and a sliding sleeve. The fitting body includes a first end and a second end. An annular groove portion is provided on the inner circumference of the fitting body. The sliding sleeve is embedded in the annular groove portion and can slide and adjust in the annular groove portion. A first heating copper wire is provided on the inner circumference of the sliding sleeve. A first wiring electrode is provided on the outer circumference of the first end of the fitting body, and the first wiring electrode is electrically connected to the first heating copper wire.

[0008] The present invention is further configured such that an annular convex portion is fixedly connected to the inner circumference of the fitting body, and the inner diameter of the annular convex portion is smaller than the inner diameter of the sliding sleeve. An annular plug member is fixedly connected to the end of the first end of the fitting body, and the annular groove portion is formed between the annular plug member and the annular convex portion.

[0009] The present invention is further configured such that the ring plugging member is fixedly connected to the first end of the pipe fitting body by hot melting.

[0010] The present invention is further configured such that the inner diameter of the sliding sleeve is the same as the inner diameter of the ring plugging member.

[0011] The present invention is further configured such that along the axial direction of the first end of the pipe fitting body, the length of the annular groove portion is greater than the length of the sliding sleeve; a sliding and sealing connection is provided between the outer periphery of the sliding sleeve and the inner periphery of the first end.

[0012] The present invention is further configured such that a sealing ring is embedded in the inner periphery of the first end of the pipe fitting body, and a sliding seal is provided between the outer periphery of the sliding sleeve and the inner periphery of the first end through the sealing ring.

[0013] The present invention is further configured such that the inner diameter of the sliding sleeve is dn, the thickness of the sliding sleeve is t1, and the dimension of t1 is [dn / 26, dn / 17]; a clearance fit is provided between the outer periphery of the sliding sleeve and the inner periphery of the annular groove portion, and the clearance is [0.2 mm, 0.5 mm]; the axial length of the sliding sleeve is H1, and the dimension of H1 is [dn / 4, dn / 2].

[0014] The present invention is further configured such that a second heating copper wire is provided on the inner periphery of the second end, and a second wiring electrode is provided on the outer periphery of the second end of the pipe fitting body, and the second wiring electrode is electrically connected to the second heating copper wire.

[0015] The present invention is further configured such that the inner diameter of the annular convex portion is smaller than the inner diameter of the second end, and a pressing ring for sealing is provided on the side of the annular convex portion facing the second end.

[0016] The present invention is further configured such that the thickness of the second end of the pipe fitting body is t2, and the dimension of t2 is not less than dn / 11.

[0017] The present invention is further configured such that the length range covered by the second heating copper wire is H2, and the dimension of H2 is [0.9H1, 1.0H1].

[0018] The present invention further provides a pipeline installation assembly, which includes the plastic electrofusion pipe fitting with a telescopic function as described above, and further includes a first pipe. The end of the first pipe extends into the inner periphery of the sliding sleeve and is fixedly connected to the inner periphery of the sliding sleeve by hot melting; the first pipe and the sliding sleeve are fixedly welded to each other and can slide synchronously relative to the plastic electrofusion pipe fitting.

[0019] In summary, the present invention has the following beneficial effects:

[0020] One end of the pipe fitting body is a fixed connection end, and the other end is a movable connection end. A sliding sleeve is installed inside the first end. The sliding sleeve can axially slide and adjust relative to the pipe fitting body. Thus, after the pipe fitting 1 is installed, axial movement adjustment can be achieved, which can adapt to the telescopic movement adjustment of the pipeline, form a relatively free telescopic adjustment space, can adapt to the thermal expansion and contraction, vibration, etc. of the pipe material, can reduce the installation of pipeline expansion joints, and the installation layout of the pipe material and the pipe fitting is more efficient.

[0021] By using this plastic electrofusion pipe fitting, the connection between two pipe fittings can be realized, which can replace the rubber expansion joint in the conventional pipeline, avoid the aging and short service life of the rubber expansion joint, and affect the overall service life of the pipeline; moreover, during the connection process of the pipeline, the rubber expansion joint can be reduced or even eliminated, which can also facilitate the assembly and connection of the pipeline, and the installation efficiency is higher. Brief Description of the Drawings

[0022] Figure 1 It is a cross-sectional view of a plastic electrofusion pipe fitting with a telescopic function in this embodiment;

[0023] Figure 2 It is a cross-sectional view of a plastic electrofusion pipe fitting with a telescopic function in this embodiment, used to represent the dimensions of each part;

[0024] Figure 3 It is a cross-sectional view of a pipeline installation assembly in this embodiment.

[0025] Reference Numerals: Pipe fitting body 1; First end 101; Second end 102; Ring convex part 103; Observation hole 104; Anti-spray glue plug 105; Ring groove part 106; Pressure ring 2; Sliding sleeve 3; Sealing ring 4; First heating copper wire 5; First wiring electrode 51; Second heating copper wire 6; Second wiring electrode 61; Ring plug 7; First pipe material 8; Second pipe material 9. Detailed Embodiment

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0027] This embodiment discloses a plastic electrofusion pipe fitting with a telescopic function. Referring to Figure 1 、 Figure 2 As shown, it includes a pipe fitting body 1 and a sliding sleeve 3. The pipe fitting body 1 is generally a two-way joint, including a first end 101 and a second end 102. A ring groove part 106 is opened on the inner circumference of the pipe fitting body 1, and a sliding sleeve 3 is embedded in the ring groove part 106. The sliding sleeve 3 can slide and adjust in the ring groove part 106.

[0028] A heating copper wire 5 is arranged on the inner circumference of the sliding sleeve 3, and a wiring electrode 51 is arranged on the outer circumference of the first end 101 of the pipe fitting body 1. The wiring electrode 51 is electrically connected to the heating copper wire 5. Along the axial direction of the first end 101 of the pipe fitting body 1, the length of the annular groove portion 106 is greater than the length of the sliding sleeve 3; a sliding seal connection is formed between the outer circumference of the sliding sleeve 3 and the inner circumference of the first end 101.

[0029] Furthermore, an annular convex portion 103 is fixedly connected to the inner circumference of the pipe fitting body 1. The inner diameter of the annular convex portion 103 is smaller than the inner diameter of the sliding sleeve 3, and axial positioning can be formed in the pipe fitting body 1 through the annular convex portion 103.

[0030] An annular plug member 7 is fixedly connected to the end of the first end 101 of the pipe fitting body 1. An annular groove portion 106 is formed between the annular plug member 7 and the annular convex portion 103. The two ends of the annular groove portion 106 are blocked and limited by the annular plug member 7 and the annular convex portion 103 respectively. Specifically, the annular plug member 7 is fixedly connected to the first end 101 of the pipe fitting body 1 by hot melting.

[0031] In order to seal the first end 101 of the pipe fitting body 1, a sealing ring 4 is embedded in the inner circumference of the first end 101 of the pipe fitting body 1. The outer circumference of the sliding sleeve 3 and the inner circumference of the first end 101 are slidably sealed by the sealing ring 4, so that a stable sealing effect can be maintained while sliding adjustment is performed.

[0032] In this embodiment, the pipe fitting body 1 has a two-way structure and has a first end 101 and a second end 102. A heating copper wire 6 is arranged on the inner circumference of the second end 102, and a wiring electrode 61 is arranged on the outer circumference of the second end 102 of the pipe fitting body 1. The wiring electrode 61 is electrically connected to the heating copper wire 6, which is convenient for connecting electricity for electrothermal fusion. The inner diameter of the annular convex portion 103 is smaller than the inner diameter of the second end 102, and a pressing ring 2 for sealing is arranged on one side of the annular convex portion 103 facing the second end 102.

[0033] Refer to Figure 2As shown, the inner diameter of the sliding sleeve 3 is the same as that of the second end 102 of the pipe fitting body 1, both being dn. The thickness of the sliding sleeve 3 is t1, and the dimension of t1 is from dn / 26 to dn / 17. The thickness of the second end 102 of the pipe fitting body 1 is t2, and the dimension of t2 is not less than dn / 11. The axial length of the sliding sleeve 3 is H1, and the dimension of H1 is from dn / 4 to dn / 2. The length range covered by the heating copper wire two 6 on the inner circumference of the second end 102 is H2, and the dimension of H2 is from 0.9H1 to 1.0H1. The outer diameter of the ring plug 7 is the same as that of the pipe fitting body 1, and the inner diameter of the ring plug 7 is the same as that of the sliding sleeve 3. The pressing ring 2 is adapted to the inner circumference of the second end 102, the outer diameter of the pressing ring 2 is from dn to 1.01dn, and the wall thickness is from 0.2 to 0.3dn / 11. The inner circumference dimensions of the sliding sleeve 3 and the ring groove part 106 are also mutually adapted. The outer circumference of the sliding sleeve 3 and the inner circumference of the ring groove part 106 have a clearance fit, and the dimension fit clearance is from 0.2 to 0.5 mm, so that the sliding sleeve 3 can axially slide and adjust within the ring groove part 106. The sliding seal is achieved through the sealing ring 4 at the clearance. Specifically, the sealing ring 4 can be a temperature-resistant rubber ring. The wire diameter of the sealing ring 4 is from 0.1 to 0.2dn, and the outer diameter is dn + 2t1 + 1. All the above interval ranges are closed intervals.

[0034] This embodiment also discloses a production method of a plastic electrofusion pipe fitting with a telescopic function, including the following steps:

[0035] The preparation of this pipe fitting is divided into the following 9 steps:

[0036] A. The pipe fitting body 1 and the sliding sleeve 3 are processed by injection molding;

[0037] B. The inner hole of the first end 101 of the pipe fitting body 1 and the ring plug 7 are machined by a numerical control lathe;

[0038] C. The inner hole of the second end 102 of the pipe fitting body 1 is machined by a numerical control lathe;

[0039] D. On the numerical control lathe, according to the set program, the heating copper wire two 6 is arranged on the inner hole surface of the second end 102. The heating copper wire two 6 adopts the single-wire reciprocating equal-spacing wiring method and a certain length is reserved;

[0040] E. The outer surface of the sliding sleeve 3 is machined by a numerical control lathe, and two sealing ring grooves are formed. The sealing ring grooves are adapted to the sealing ring 4;

[0041] F. On the numerical control lathe, according to the set program, the heating copper wire one 5 is arranged on the inner hole surface of the sliding sleeve 3. The heating copper wire one 5 adopts the single-wire reciprocating equal-spacing wiring method and a certain length is reserved;

[0042] G. First, install the two sealing rings 4 together into the sealing groove on the sliding sleeve 3, and then install the sliding sleeve 3 into the inner hole of the first end 101 of the pipe fitting body 1 to achieve sealing.

[0043] H. Connect the reserved copper wires at the ends of the heating copper wire one 5 and the heating copper wire two 6 to the corresponding wiring electrodes one 51 and wiring electrodes two 61 respectively.

[0044] I. Install the ring plug 7 at the first end 101 of the pipe fitting body 1, and connect and fix it by hot melt welding to block and limit the sliding sleeve 3 in the ring groove part 106.

[0045] J. Install other accessories to complete the production of the above plastic electrofusion pipe fitting.

[0046] This embodiment also discloses a pipeline installation assembly. Referring to Figure 3 as shown, it includes the plastic electrofusion pipe fitting with telescopic function in the above embodiment, and also includes a pipe one 8 and a pipe two 9.

[0047] When the first end 101 of the pipe fitting body 1 is connected, the end of the pipe one 8 extends into the inner circumference of the sliding sleeve 3 and is fixedly connected by hot melt with the inner circumference of the sliding sleeve 3; the pipe one 8 can seal and slide adjust relative to the plastic electrofusion pipe fitting with telescopic function.

[0048] When the first end 101 of the pipe fitting body 1 is connected, the end of the pipe one 8 extends into the inner circumference of the sliding sleeve 3 and is fixedly connected by hot melt with the inner circumference of the sliding sleeve 3. After hot melt connection, the pipe one 8 and the sliding sleeve 3 are connected to form an integral structure. The pipe one 8 can slide adjust relative to the first end 101 of the pipe fitting body 1, so that the pipe one 8 can form a relatively free telescopic adjustment space after installation, can adapt to the thermal expansion and contraction, vibration, etc. of the pipe, can reduce the installation of expansion joints of the pipeline, and the installation and layout of the pipe and the pipe fitting are more efficient.

[0049] When the second end 102 of the pipe fitting body 1 is connected, the end of the pipe two 9 extends into the inner circumference of the second end 102 of the pipe fitting body 1 until the end of the pipe two 9, the pressing ring 2 and the step surface of the ring convex part 103 are in contact, for axial positioning of the pipe two 9; then, the wiring electrode two 61 is energized, the heating copper wire two 6 is melted by heat, and hot melt connection and fixation are achieved between the outer circumference of the pipe two 9 and the inner circumference of the second end 102.

[0050] In the pipeline installation component of this embodiment, during use, the second pipe 9 and the fitting body 1 can maintain relative connection and fixation, while the first pipe 8 and the fitting body 1 can relatively telescopically slide. During installation construction, the two ends of the fitting body 1 are welded respectively according to the construction parameters. In the entire pipeline, a plastic electrofusion fitting with a telescopic function can be installed at certain intervals to enable the entire pipeline to be telescopically adjusted, so that it can meet the conditions of thermal expansion and contraction and vibration of the pipeline, and can also replace ordinary rubber expansion joints to avoid the problem of easy aging of rubber expansion joints. In addition, it is also convenient for pipeline connection and installation.

[0051] The above are only the preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those of ordinary skill in the art, several improvements and refinements made without departing from the principle of the present invention should also be regarded as within the protection scope of the present invention.

Claims

1. A plastic electric fusion pipe fitting with telescopic function, characterized in that: The invention comprises a pipe body (1) and a sliding sleeve (3), wherein the pipe body (1) comprises a first end (101) and a second end (102), an annular groove (106) is provided on the inner circumference of the pipe body (1), the sliding sleeve (3) is embedded in the annular groove (106), and the sliding sleeve (3) can be slidably adjusted on the annular groove (106); a heating copper wire (5) is provided on the inner circumference of the sliding sleeve (3), and a wiring electrode (51) is provided on the outer circumference of the first end (101) of the pipe body (1), and the wiring electrode (51) is electrically connected to the heating copper wire (5).

2. The plastic electric fusion pipe fitting with telescopic function according to claim 1, characterized in that: An annular protrusion (103) is fixedly connected to the inner circumference of the pipe body (1), and the inner diameter of the annular protrusion (103) is smaller than the inner diameter of the sliding sleeve (3); an annular plug (7) is fixedly connected to the end of the first end (101) of the pipe body (1), and the annular groove (106) is formed between the annular plug (7) and the annular protrusion (103).

3. The plastic electric fusion pipe fitting with telescopic function according to claim 2, characterized in that: The annular plug (7) is fixedly connected to the first end (101) of the pipe body (1) by hot-melt connection.

4. The plastic electric fusion pipe fitting with telescopic function according to claim 2, characterized in that: The inner diameter of the sliding sleeve (3) is consistent with the inner diameter of the annular plug (7).

5. The plastic electric fusion pipe fitting with telescopic function according to claim 1, characterized in that: Along the axial direction of the first end (101) of the pipe body (1), the length of the annular groove (106) is greater than the length of the sliding sleeve (3); the outer periphery of the sliding sleeve (3) and the inner periphery of the first end (101) are connected in a sliding sealing manner.

6. The plastic electric fusion pipe fitting with telescopic function according to claim 5, characterized in that: A sealing ring (4) is embedded in the inner periphery of the first end (101) of the pipe body (1), and the outer periphery of the sliding sleeve (3) and the inner periphery of the first end (101) are slidably sealed via the sealing ring (4).

7. The plastic electric fusion pipe fitting with telescopic function according to claim 1, characterized in that: The inner diameter of the sliding sleeve (3) is dn, the thickness of the sliding sleeve (3) is t1, and the size of t1 is [dn / 26, dn / 17]; the outer periphery of the sliding sleeve (3) and the inner periphery of the annular groove (106) are clearance matched, and the clearance is [0.2mm, 0.5mm]; the axial length of the sliding sleeve (3) is H1, and the size of H1 is [dn / 4, dn / 2].

8. The plastic electric fusion pipe fitting with telescopic function according to claim 2, characterized in that: A second heating copper wire (6) is arranged on the inner periphery of the second end (102), and a second wiring electrode (61) is arranged on the outer periphery of the second end (102) of the pipe body (1), and the second wiring electrode (61) is electrically connected to the second heating copper wire (6).

9. The plastic electric fusion pipe fitting with telescopic function according to claim 8, characterized in that: The inner diameter of the annular protrusion (103) is smaller than the inner diameter of the second end (102), and a pressure ring (2) for sealing is provided on the side of the annular protrusion (103) facing the second end (102).

10. A pipeline installation assembly, characterized in that: It comprises the plastic electric fusion pipe fitting as described in any one of claims 1 to 9, and also comprises a pipe one (8), the end of the pipe one (8) extends into the inner circumference of the sliding sleeve (3) and is hot-melt connected to the inner circumference of the sliding sleeve (3); the pipe one (8) and the sliding sleeve (3) are fused and fixed to each other, and can slide synchronously relative to the plastic electric fusion pipe fitting.

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