Electromagnetic induction hot melting joint

Abstract

The utility model belongs to the technical field of pipeline connection, and particularly relates to an electromagnetic induction hot melting joint which comprises a joint body with more than two connecting ends, at least one connecting end of the joint body is provided with a connecting outer pipe and a sealing inner pipe, and the wall thickness of the sealing inner pipe is smaller than that of the connecting outer pipe. An outer electromagnetic induction heat production ring is arranged on the inner ring of the connecting outer pipe, an inner electromagnetic induction heat production ring is arranged on the outer ring of the sealing inner pipe, a plurality of supporting strips are arranged on the inner ring of the outer electromagnetic induction heat production ring in the circumferential direction at intervals, and an air outlet channel is formed between every two adjacent supporting strips. And a gap for inserting a pipeline is reserved between the supporting strip and the sealing inner pipe. The connecting strength of the pipe joint and the pipeline is high, and the sealing effect of the pipe joint and the pipeline is good; and meanwhile, gas generated in the melting process can be effectively exhausted, the connector and the pipeline are firmly connected, the pipeline is not prone to being separated, and the connection reliability is good.

Description

Technical field:

[0001] The utility model belongs to the technical field of pipeline connection, in particular to an electromagnetic induction hot-melt joint. Background technology:

[0002] The Chinese utility model patent (publication number CN220102442U, application date 2023.06.15, publication date 2023.11.28) discloses an electromagnetic induction hot melt joint, comprising a joint body having two or more connection ends, the inner circle of at least one connection end of the joint body is provided with an electromagnetic induction heat generating ring, the electromagnetic induction heat generating ring is provided with a through groove penetrating the side wall, the inner circle of the joint body is provided with a protrusion embedded in the through groove, the joint body is formed by injection molding, and is fixedly connected to the electromagnetic induction heat generating ring by injection molding.

[0003] The shortcomings of the above-mentioned electromagnetic induction hot melt joint are: 1. When the wall thickness of the connecting end of the joint body is relatively thick, during the connection process between the electromagnetic induction hot melt joint and the pipeline, the pipeline will be deformed due to heat, forming a non-circular structure such as an elliptical shape, while the connecting end of the joint body with a thick wall thickness is not easy to deform, so that the pipeline cannot fit well in the electromagnetic induction hot melt joint, which leads to a gap between the electromagnetic induction hot melt joint and the pipeline, resulting in leakage; 2. When the wall thickness of the connecting end of the joint body is relatively thin, the electromagnetic induction hot melt joint is easy to break during use, resulting in failure of the pipeline connection; 3. After the joint body and the pipeline of the plastic material are melted, gas will be generated. The gas cannot be discharged and will form pores on the joint body and the pipeline, resulting in a loose connection between the electromagnetic induction hot melt joint and the pipeline. During use, the electromagnetic induction hot melt joint is easy to separate from the pipeline, resulting in failure of the pipeline connection. Summary of the invention:

[0004] The utility model aims to provide an electromagnetic induction hot-melt joint, which has a strong connection strength with the pipeline and a good sealing effect with the pipeline; at the same time, it can effectively discharge the gas generated in the melting process, the connection between the joint and the pipeline is firm, the pipeline is not easy to separate, and the connection reliability is good.

[0005] The utility model is achieved in this way:

[0006] An electromagnetic induction hot-melt joint comprises a joint body having more than two connection ends, wherein at least one connection end of the joint body is provided with a connecting outer tube and a sealed inner tube, the wall thickness of the sealed inner tube is less than the wall thickness of the connecting outer tube, the inner ring of the connecting outer tube is provided with an outer electromagnetic induction heat generating ring, the outer ring of the sealed inner tube is provided with an inner electromagnetic induction heat generating ring, the inner ring of the outer electromagnetic induction heat generating ring is provided with a plurality of support bars at intervals along the circumferential direction, an air outlet channel is formed between two adjacent support bars, and a gap for inserting a pipeline is reserved between the support bar and the sealed inner tube.

[0007] In the above-mentioned electromagnetic induction hot melt joint, the support strips are evenly distributed along the circumference, and the width of the air outlet channel is greater than the width of the support strips.

[0008] In the above-mentioned electromagnetic induction hot melt joint, the outer diameter of the pipe is 30 to 70 times the thickness of the support strip.

[0009] In the above-mentioned electromagnetic induction hot melt joint, the height of the sealed inner tube is lower than the height of the connecting outer tube, and the wall thickness of the connecting outer tube is 2.5 times to 4 times the wall thickness of the sealed inner tube.

[0010] In the above-mentioned electromagnetic induction hot melt joint, the outer end of the connecting outer tube is provided with a guide frustum, and the outer diameter of the guide frustum gradually decreases from the inside to the outside.

[0011] In the above-mentioned electromagnetic induction hot melt joint, the outer electromagnetic induction heat generating ring and the inner electromagnetic induction heat generating ring are both provided with through grooves penetrating the side walls, and the connecting outer tube inner ring and the sealing inner tube outer ring are respectively provided with protrusions embedded in the corresponding through grooves.

[0012] In the above-mentioned electromagnetic induction hot melt joint, the outer electromagnetic induction heat generating ring and the inner electromagnetic induction heat generating ring are both annular sheets, the through groove is a through hole, and a plurality of through holes are provided.

[0013] In the above-mentioned electromagnetic induction hot melt joint, the through hole is a circular hole, a rectangular hole or a diamond hole.

[0014] In the above-mentioned electromagnetic induction hot melt joint, the protrusion connecting the outer tube does not protrude from the inner ring of the outer electromagnetic induction heat generating ring, and the protrusion sealing the inner tube does not protrude from the outer ring of the inner electromagnetic induction heat generating ring.

[0015] In the above-mentioned electromagnetic induction heat-melting joint, the maximum outer diameter of the guide frustum is equal to the outer diameter of the inner electromagnetic induction heat-generating ring.

[0016] In the above-mentioned electromagnetic induction hot melt joint, the outer electromagnetic induction heat generating ring and the inner electromagnetic induction heat generating ring are both mesh-shaped, and the through grooves are mesh holes.

[0017] In the above-mentioned electromagnetic induction heat-melting joint, the outer electromagnetic induction heat-generating ring and the inner electromagnetic induction heat-generating ring are both spiral-shaped, and the through groove is a spiral gap.

[0018] In the above-mentioned electromagnetic induction hot melt joint, the protrusion connecting the outer tube protrudes from the inner ring of the outer electromagnetic induction heat generating ring, and forms an annular inner ring layer on the inner side of the outer electromagnetic induction heat generating ring; the support bar is arranged on the inner ring of the annular inner ring layer; the protrusion of the sealing inner tube protrudes from the outer ring of the inner electromagnetic induction heat generating ring, and forms an annular outer ring layer adapted to the inner diameter of the pipeline on the outer side of the inner electromagnetic induction heat generating ring.

[0019] In the above-mentioned electromagnetic induction hot melt joint, the maximum outer diameter of the guide frustum is equal to the outer diameter of the annular outer ring layer.

[0020] In the above-mentioned electromagnetic induction hot melt joint, the material of the outer electromagnetic induction heat generating ring is iron or steel, and the material of the inner electromagnetic induction heat generating ring is iron or steel.

[0021] The outstanding advantages of the utility model compared with the prior art are:

[0022] 1. The utility model is provided with a thicker connecting outer tube for connecting the pipeline, and a thinner sealing inner tube for sealing with the pipeline, which has a strong connection strength with the pipeline and a good sealing effect with the pipeline; the utility model is provided with a support strip on the inner ring of the outer electromagnetic induction heat generating ring, so that an air outlet channel is formed between the pipeline and the outer electromagnetic induction heat generating ring, and the gas generated during the melting process can be discharged through the air outlet channel. The electromagnetic induction hot melt joint of the utility model is firmly connected to the pipeline, the pipeline is not easy to separate, and the connection reliability is good;

[0023] 2. The support bars of the utility model are evenly distributed along the circumference, and the width of the air outlet channel is greater than the width of the support bars, so the air outlet effect is good;

[0024] 3. The height of the sealed inner tube of the utility model is lower than the height of the connecting outer tube, and the wall thickness of the connecting outer tube is 2.5 to 4 times the wall thickness of the sealed inner tube. The sealed inner tube has a low height and a thin wall thickness, which can better seal with the pipeline; the connecting outer tube has a high height and a thick wall thickness, which can better connect with the pipeline. Description of the drawings:

[0025] Figure 1 is a cross-sectional view of a joint and a pipe in Embodiment 1 of the present utility model;

[0026] Figure 2 It is an exploded view of the joint and the pipeline of the first embodiment of the utility model;

[0027] Figure 3 It is a three-dimensional diagram of the first embodiment of the utility model;

[0028] Figure 4 It is a right side view of the first embodiment of the utility model;

[0029] Figure 5 It is a three-dimensional diagram of the outer electromagnetic induction heat generating ring of the second embodiment of the utility model;

[0030] Figure 6 It is a three-dimensional diagram of the second embodiment of the utility model;

[0031] Figure 7 It is a three-dimensional diagram of the outer electromagnetic induction heat generating ring of the fourth embodiment of the utility model;

[0032] Figure 8 It is a three-dimensional diagram of the fourth embodiment of the utility model;

[0033] Fig. 9 It is a three-dimensional diagram of the outer electromagnetic induction heat generating ring of the fifth embodiment of the utility model;

[0034] Fig.10 It is a three-dimensional diagram of the fifth embodiment of the utility model;

[0035] Figure numerals: 1. joint body; 2. connecting outer tube; 3. sealing inner tube; 4. outer electromagnetic induction heat generating ring; 5. inner electromagnetic induction heat generating ring; 6. support bar; 7. air outlet channel; 8. pipeline; 9. guide frustum. Specific implementation method:

[0036] The present invention is further described below with reference to specific embodiments. Figure 1 —10:

[0037] Example 1: Participation Figure 1-4 :

[0038] An electromagnetic induction hot-melt joint comprises a joint body 1 having two or more connecting ends, wherein at least one connecting end of the joint body 1 is provided with a connecting outer tube 2 and a sealing inner tube 3, the wall thickness of the sealing inner tube 3 is less than the wall thickness of the connecting outer tube 2, the inner ring of the connecting outer tube 2 is provided with an outer electromagnetic induction heat generating ring 4, the outer ring of the sealing inner tube 3 is provided with an inner electromagnetic induction heat generating ring 5, the inner ring of the outer electromagnetic induction heat generating ring 4 is provided with a plurality of support bars 6 at intervals along the circumferential direction, an air outlet channel 7 is formed between two adjacent support bars 6, and a gap for inserting a pipeline 8 is reserved between the support bar 6 and the sealing inner tube 3.

[0039] The hot-melt connection steps of the joint of the utility model and the pipe 8 are as follows: the pipe 8 is installed into the gap between the support bar 6 and the sealed inner pipe 3 of the electromagnetic induction hot-melt joint of the utility model, and then the electromagnetic hot-melt clamp is mounted on the outside of the electromagnetic induction hot-melt joint, and then the electromagnetic hot-melt clamp is turned on to generate a high-frequency magnetic field. The outer electromagnetic induction heat generating ring 4 and the inner electromagnetic induction heat generating ring 5 located in the magnetic field generate heat, and the corresponding positions of the connected outer pipe 2, the sealed inner pipe 3 and the pipe 8 are melted and bonded, so that the pipe 8 is bonded in the electromagnetic induction hot-melt joint of the utility model.

[0040] like Figure 1-4As shown, the utility model is provided with a thicker connecting outer tube 2 for connecting the pipeline 8, and a thinner sealing inner tube 3 for sealing with the pipeline 8. The connection strength with the pipeline 8 is strong, and the sealing effect with the pipeline 8 is good; the utility model is provided with a support bar 6 on the inner ring of the outer electromagnetic induction heat generating ring 4, so that an air outlet channel 7 is formed between the pipeline 8 and the outer electromagnetic induction heat generating ring 4, and the gas generated during the melting process can be discharged through the air outlet channel 7. The electromagnetic induction hot melt joint of the utility model is firmly connected to the pipeline 8, the electromagnetic induction hot melt joint is not easy to be separated from the pipeline, and the connection reliability is good.

[0041] In order to achieve a better air outlet effect, the support bars 6 are evenly distributed along the circumference, and the width of the air outlet channel 7 is greater than the width of the support bars 6 .

[0042] In order to further ensure the air outlet effect, the outer diameter of the pipe 8 is 30 to 70 times the thickness of the support bar 6. In this embodiment, the outer diameter of the pipe 8 is 50 times the thickness of the support bar 6.

[0043] For better sealing and connection effects, such as Figure 1-4 As shown, the height of the sealed inner tube 3 is lower than the height of the connecting outer tube 2, and the wall thickness of the connecting outer tube 2 is 2.5 to 4 times the wall thickness of the sealed inner tube 3. The sealed inner tube 3 has a low height and a thin wall thickness, which can better seal with the pipeline 8; the connecting outer tube 2 has a high height and a thick wall thickness, which can better connect with the pipeline 8. In this embodiment, the wall thickness of the connecting outer tube 2 is 3.6 times the wall thickness of the sealed inner tube 3.

[0044] In order to facilitate the installation of the pipe 8 into the joint of the utility model, a guide truncated cone 9 is provided at the outer end of the connecting outer pipe 2, and the outer diameter of the guide truncated cone 9 gradually decreases from the inside to the outside.

[0045] In order to better bond the pipeline 8 with the connected outer tube 2 and the sealed inner tube 3, the outer electromagnetic induction heat generating ring 4 and the inner electromagnetic induction heat generating ring 5 are both provided with through grooves penetrating the side walls, and the inner ring of the connected outer tube 2 and the outer ring of the sealed inner tube 3 are respectively provided with protrusions embedded in the corresponding through grooves. When the outer electromagnetic induction heat generating ring 4 and the inner electromagnetic induction heat generating ring 5 are heated, the corresponding positions of the connected outer tube 2, the sealed inner tube 3 and the pipeline 8, and the protrusions melt, the protrusions located in the outer electromagnetic induction heat generating ring 4 are bonded to the connected outer tube 2 and the pipeline 8, and the protrusions located in the inner electromagnetic induction heat generating ring 5 are bonded to the sealed inner tube 3 and the pipeline 8, so that the pipeline 8 is firmly bonded to the connected outer tube 2 and the sealed inner tube 3.

[0046] The structure of the outer electromagnetic induction heat generating ring 4 and the inner electromagnetic induction heat generating ring 5: the outer electromagnetic induction heat generating ring 4 and the inner electromagnetic induction heat generating ring 5 are both annular sheets, the through groove is a through hole, and a plurality of through holes are provided. In this embodiment, the through hole is a rectangular hole.

[0047] Furthermore, the protrusion connecting the outer tube 2 does not protrude from the inner ring of the outer electromagnetic induction heat generating ring 4, and the protrusion sealing the inner tube 3 does not protrude from the outer ring of the inner electromagnetic induction heat generating ring 5. In this embodiment, the protrusion connecting the outer tube 2 is flush with the inner ring of the outer electromagnetic induction heat generating ring 4, and the protrusion sealing the inner tube 3 is flush with the outer ring of the inner electromagnetic induction heat generating ring 5.

[0048] Furthermore, the maximum outer diameter of the guide cone 9 is equal to the outer diameter of the inner electromagnetic induction heat generating ring 5 .

[0049] Preferably, the material of the outer electromagnetic induction heat generating ring 4 is iron or steel, and the material of the inner electromagnetic induction heat generating ring 5 is iron or steel.

[0050] Example 2: See Figure 5 , 6 :

[0051] The structure of this embodiment is basically the same as that of the above-mentioned embodiment 1, and the main difference is that the through hole is a circular hole.

[0052] Embodiment three:

[0053] The structure of this embodiment is basically the same as that of the above-mentioned embodiment 1, and the main difference is that the through hole is a diamond-shaped hole.

[0054] Example 4: See Figure 7 , 8 :

[0055] The structure of this embodiment is basically the same as that of the above-mentioned embodiment 1, and the main difference is that the outer electromagnetic induction heat generating ring 4 and the inner electromagnetic induction heat generating ring 5 are both mesh-shaped, and the through grooves are mesh holes.

[0056] In order to enable the joint of the utility model to be better connected to the pipeline 8, the protrusion of the connecting outer tube 2 protrudes from the inner circle of the outer electromagnetic induction heat generating ring 4, and forms an annular inner ring layer on the inner side of the outer electromagnetic induction heat generating ring 4; the support bar 6 is arranged on the inner circle of the annular inner ring layer; the protrusion of the sealing inner tube 3 protrudes from the outer circle of the inner electromagnetic induction heat generating ring 5, and forms an annular outer ring layer adapted to the inner diameter of the pipeline 8 on the outer side of the inner electromagnetic induction heat generating ring 5.

[0057] Furthermore, the maximum outer diameter of the guide cone 9 is equal to the outer diameter of the annular outer ring layer.

[0058] Example 5: See Fig. 9 , 10 :

[0059] The structure of this embodiment is basically the same as that of the above-mentioned embodiment 1, and the main difference is that the outer electromagnetic induction heat generating ring 4 and the inner electromagnetic induction heat generating ring 5 are both spiral-shaped, and the through groove is a spiral gap.

[0060] In order to enable the joint of the utility model to be better connected to the pipeline 8, the protrusion of the connecting outer tube 2 protrudes from the inner circle of the outer electromagnetic induction heat generating ring 4, and forms an annular inner ring layer on the inner side of the outer electromagnetic induction heat generating ring 4; the support bar 6 is arranged on the inner circle of the annular inner ring layer; the protrusion of the sealing inner tube 3 protrudes from the outer circle of the inner electromagnetic induction heat generating ring 5, and forms an annular outer ring layer adapted to the inner diameter of the pipeline 8 on the outer side of the inner electromagnetic induction heat generating ring 5.

[0061] Furthermore, the maximum outer diameter of the guide cone 9 is equal to the outer diameter of the annular outer ring layer.

[0062] The above embodiment is only one of the preferred embodiments of the present utility model, and is not intended to limit the scope of implementation of the present utility model. Therefore, any equivalent changes made based on the shape, structure, and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. An electromagnetic induction hot melt joint, comprising a joint body (1) having two or more connection ends, characterized in that: At least one connection end of the joint body (1) is provided with a connecting outer tube (2) and a sealing inner tube (3); the wall thickness of the sealing inner tube (3) is smaller than the wall thickness of the connecting outer tube (2); the inner ring of the connecting outer tube (2) is provided with an outer electromagnetic induction heat generating ring (4); the outer ring of the sealing inner tube (3) is provided with an inner electromagnetic induction heat generating ring (5); the inner ring of the outer electromagnetic induction heat generating ring (4) is provided with a plurality of support bars (6) at intervals along the circumferential direction; an air outlet channel (7) is formed between two adjacent support bars (6); and a gap for inserting a pipeline (8) is reserved between the support bar (6) and the sealing inner tube (3).

2. The electromagnetic induction hot melt joint according to claim 1, characterized in that: The support bars (6) are evenly distributed along the circumference, and the width of the air outlet channel (7) is greater than the width of the support bars (6).

3. The electromagnetic induction hot melt joint according to claim 1, characterized in that: The height of the sealed inner tube (3) is lower than the height of the connecting outer tube (2), and the wall thickness of the connecting outer tube (2) is 2.5 to 4 times the wall thickness of the sealed inner tube (3).

4. The electromagnetic induction hot melt joint according to claim 1, characterized in that: The outer end of the connecting outer tube (2) is provided with a guide truncated cone (9), and the outer diameter of the guide truncated cone (9) gradually decreases from the inside to the outside.

5. The electromagnetic induction hot melt joint according to claim 1, characterized in that: The outer electromagnetic induction heat generating ring (4) and the inner electromagnetic induction heat generating ring (5) are both provided with through grooves penetrating the side walls, and the inner ring of the connecting outer tube (2) and the outer ring of the sealing inner tube (3) are respectively provided with protrusions embedded in the corresponding through grooves.

6. The electromagnetic induction hot melt joint according to claim 5, characterized in that: The outer electromagnetic induction heat generating ring (4) and the inner electromagnetic induction heat generating ring (5) are both in the shape of annular sheets, and the through groove is a through hole, and a plurality of through holes are provided.

7. The electromagnetic induction hot melt joint according to claim 5, characterized in that: The outer electromagnetic induction heat generating ring (4) and the inner electromagnetic induction heat generating ring (5) are both in a mesh shape, and the through grooves are mesh holes.

8. The electromagnetic induction hot melt joint according to claim 5, characterized in that: The outer electromagnetic induction heat generating ring (4) and the inner electromagnetic induction heat generating ring (5) are both spiral-shaped, and the through groove is a spiral gap.

Images