Electric melting pipe fitting with electric heating wires arranged after being exposed

Abstract

The utility model discloses an electric melting pipe fitting with an electric heating wire arranged after being exposed, which comprises a pipe fitting body and further comprises two clamping rings which are respectively arranged at two ends of the pipe fitting body in a sleeved mode. The opening is formed in the lower end of the clamping ring and used for clamping the clamping ring on the outer surface of the pipe fitting body; the supporting legs are fixedly arranged at the left end and the right end of the clamping ring; wherein the clamping ring is made of an elastic material, when the clamping ring is arranged on the pipe fitting body in a sleeving mode, the clamping ring clamps the outer surface of the pipe fitting body through elasticity, the opening can be enlarged along with opening of the clamping ring, when the pipe fitting body which is not welded is stored, the pipe fitting body can be prevented from rolling everywhere, and when the pipe fitting body and a polyethylene pipeline are welded, the pipe fitting body can be prevented from rolling around. The pipe fitting body can be prevented from rolling through the arrangement of the clamping rings and the supporting feet, a welding head of an electric fusion welding machine can be conveniently and rapidly connected into a copper foot of the pipe fitting body, manual repeated adjustment of the pipe fitting body is avoided, and meanwhile in the welding process, the pipe fitting body is not prone to rolling due to collision.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric fusion pipe fittings, in particular to an electric fusion pipe fitting with exposed rear heating wires. Background Art

[0002] Electric fusion pipe fittings refer to a type of plastic (polyethylene) pipe fitting that can be connected by melting due to the temperature generated by electric current. The basic principle of electric fusion welding is to use an electric fusion welding machine to heat the resistance wire embedded in the inner wall of the electric fusion pipe fitting. The energy generated by the heating causes the connecting surface of the pipe and the fitting to melt. After the gap at both ends of the pipe fitting is closed, the molten material in the interface molten zone diffuses and entangles with each other under the action of high temperature and pressure. After natural cooling, the pipe and the fitting are firmly and tightly combined together, resulting in a welded joint with a certain strength, safety and reliability.

[0003] Before conducting a water pressure test on an electric fusion pipe fitting, it is necessary to perform electric fusion welding on the two polyethylene pipes and the two ends of the electric fusion pipe fitting. However, the electric fusion pipe fitting is usually a cylinder and will continuously roll back and forth during the installation process. It is difficult to align and connect the welding head of the electric fusion welding machine with the copper angle interface of the electric fusion pipe fitting. Manual adjustment of the electric fusion pipe fitting is required to prevent it from rolling. In addition, if the electric fusion pipe fitting is accidentally hit during the welding process, it may easily roll, thereby affecting the welding effect or causing it to fall from the work surface. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: a bare rear-laid electric heating wire electric fusion pipe fitting, comprising a pipe fitting body, characterized in that it also includes:

[0005] There are two clamping rings, which are respectively sleeved on both ends of the pipe body;

[0006] An opening is provided at the lower end of the clamping ring, which is used to clamp the clamping ring on the outer surface of the pipe body;

[0007] Supporting feet, the left and right ends of the clamping ring are fixed with supporting feet;

[0008] An anti-slip component is provided between the clamping ring and the pipe body;

[0009] A positioning assembly, wherein the clamping ring and the pipe body are positioned by the positioning assembly;

[0010] Wherein, the clamping ring is made of elastic material. When the clamping ring is sleeved on the pipe body, the clamping ring clamps the outer surface of the pipe body through elasticity, and the opening can become larger as the clamping ring is expanded.

[0011] Furthermore, the lower surface of the support leg and the lower side surface of the pipe body are in the same plane in the horizontal direction.

[0012] Further, the positioning component includes:

[0013] A copper pin connector, which is fixedly arranged at the upper end of the pipe fitting body;

[0014] A through hole, which is penetrated and opened on the snap ring, and the through hole is matched with the copper pin connector;

[0015] Wherein, the copper pin connector is located in the through hole.

[0016] Further, it further includes:

[0017] A protective cover;

[0018] Wherein, the upper end of the copper pin connector extends out of the upper surface of the snap ring, the protective cover is covered on the upper end of the snap ring, and the inner ring of the protective cover is in interference fit with the copper pin connector.

[0019] Further, the anti-slip component includes:

[0020] An anti-slip pad, which is fixedly arranged on the inner ring of the snap ring;

[0021] Wherein, when the snap ring is clamped on the outer surface of the pipe fitting body, the inner ring of the anti-slip pad is in contact with the outer surface of the pipe fitting body.

[0022] Further, there are two anti-slip pads, and the two anti-slip pads are arranged at intervals on the inner ring of the snap ring, and the through hole is located in the interval.

[0023] Further, the anti-slip pad is made of high-temperature resistant material

[0024] Further, the anti-slip pad is made of silica gel material.

[0025] Further, it further includes:

[0026] Two dust-proof cloths, and the two dust-proof cloths are respectively wrapped around both ends of the pipe fitting body;

[0027] Wherein, when the snap ring is clamped on the outer surface of the pipe fitting body, the inner ring of the anti-slip pad is in contact with the outer surface of the dust-proof cloth.

[0028] The beneficial effects of the present utility model are as follows:

[0029] 1. By providing a snap ring, the snap ring can be clamped on the pipe fitting body, enabling the pipe fitting body to be placed and rolled through the support feet. When storing the unfused pipe fitting body, it can prevent the pipe fitting body from rolling around. And when the pipe fitting body is welded to the polyethylene pipe, the snap ring and the support feet can prevent the pipe fitting body from rolling, facilitating the quick connection of the welding head of the electrofusion welder to the copper pin of the pipe fitting body, making the operation convenient, avoiding manual repeated adjustment of the pipe fitting body, and also making it difficult for the pipe fitting body to roll due to being collided during the welding process.

[0030] 2. Since the lower surface of the support feet and the lower side surface of the pipe fitting body are in the same horizontal plane, during the welding process, after the pipe fitting body is placed on the working plane, both the lower surface of the support feet and the lower side surface of the pipe fitting body are in contact with the working plane, which can prevent the support feet from raising the pipe fitting body, facilitating the pipe fitting body and the polyethylene pipe to ensure coaxiality and making the welding accuracy higher.

[0031] 3. By providing through holes to cooperate with the copper pin connectors, it is convenient to position the snap ring on the pipe fitting body through the contact between the through holes and the copper pin connectors, achieving the effect of preventing the snap ring from moving left and right. At the same time, the through holes can also prevent interference between the copper pin connectors and the snap ring.

[0032] 4. By providing a protective cover, when the pipe fitting body is stored without being welded, it can protect the copper pin connectors and prevent dust from falling into the copper pin connectors and reducing their service life.

[0033] 5. By providing anti-slip pads, after the snap ring is clamped on the outer surface of the pipe fitting body, the snap ring tightly fits on the outer surface of the pipe fitting body through elasticity, making the anti-slip pads fit the outer surface of the pipe fitting body. This design provides greater friction between the snap ring and the pipe fitting body, making the effect of preventing relative rotation between the snap ring and the pipe fitting body better.

[0034] 6. Since the temperature is relatively high when the polyethylene pipe fitting and the pipe fitting body are hot-melt welded, the anti-slip pads are made of high-temperature resistant materials, so that the high temperature generated during the hot-melt welding of the polyethylene pipe fitting and the pipe fitting body is not easy to melt the anti-slip pads, making the overall applicability and service life of the anti-slip pads longer.

[0035] 7. Since the temperature can reach between 200°C and 240°C when the polyethylene pipe fitting and the pipe fitting body are hot-melt welded, the anti-slip pads are made of silicone material; silicone material can usually withstand temperatures up to 300°C, making the anti-slip pads more durable and having a longer service life. At the same time, silicone has good elasticity and flexibility, so that it can adapt to the deformation of the snap ring and has better overall adaptability.

[0036] 8. By setting up a dust-proof cloth, which is a flexible cloth material, after the pipe fitting body is produced, the dust-proof cloth can be wrapped around both ends of the pipe fitting body, and the dust-proof cloth is tightened by a snap ring, achieving the effect of dust prevention, thereby preventing dust or insects from entering the inside of the pipe fitting body, making the overall storage effect of the pipe fitting body better, and avoiding defective products due to long-term storage. Brief Description of the Drawings

[0037] Attached Figure 1 is the structural diagram of the present utility model;

[0038] Attached Figure 2 is the structural diagram of the pipe fitting body;

[0039] Attached Figure 3 is the structural diagram of the snap ring;

[0040] Attached Figure 4 is a schematic diagram showing that when the present utility model is placed on a working plane, the lower surface of the support feet and the lower side surface of the pipe fitting body are both in contact with the working plane;

[0041] Attached Figure 5 is a schematic diagram of the separation of the dust-proof cloth and the pipe fitting body;

[0042] Attached Figure 6 is a schematic diagram of the dust-proof cloth wrapped around both ends of the pipe fitting body;

[0043] Attached Figure 7 is a schematic diagram of the snap ring tightening the dust-proof cloth;

[0044] Description of the reference numerals: 1. Pipe fitting body, 2. Snap ring, 3. Opening, 4. Support feet, 5. Copper foot joint, 6. Through hole, 7. Protective cover, 8. Anti-slip pad, 9. Dust-proof cloth. Detailed Description of the Preferred Embodiments

[0045] The following will clearly describe the technical solutions in the embodiments of this application in conjunction with the accompanying drawings. It should be noted that the described embodiments are only some of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments that can be obtained by a person of ordinary skill in the art without inventive effort are within the scope of protection of this application. It should be noted that the terms used in this description are intended solely to describe specific embodiments and are not intended to limit the exemplary embodiments of this application. For ease of description, the dimensions of the various parts shown in the accompanying drawings are not drawn to scale. Technologies, methods, and devices known to a person of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such technologies, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values should be interpreted as merely illustrative and not limiting. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following figures. Therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0046] Example 1:

[0047] This embodiment provides a bare rear-laid electric heating wire electric fusion pipe fitting, comprising a pipe body 1, and further comprising:

[0048] There are two clamping rings 2, which are respectively sleeved on both ends of the pipe body 1;

[0049] An opening 3 is provided at the lower end of the clamping ring 2 for clamping the clamping ring 2 on the outer surface of the pipe body 1;

[0050] Support legs 4, both left and right ends of the clamping ring 2 are fixed with support legs 4;

[0051] Anti-slip assembly, an anti-slip assembly is provided between the clamping ring 2 and the pipe body 1;

[0052] Positioning assembly, the clamping ring 2 and the pipe body 1 are positioned by the positioning assembly;

[0053] The clamping ring 2 is made of elastic material. When the clamping ring 2 is sleeved on the pipe body 1 , the clamping ring 2 clamps the outer surface of the pipe body 1 through elasticity, and the opening 3 can become larger as the clamping ring 2 is expanded.

[0054] In this technical solution, when welding is required, first prepare an electric welding machine, a grinder, a tape measure, a marker pen, and two polyethylene pipes (all of which are prior art and will not be described in detail here);

[0055] First, use a tape measure to measure the socket depth of the pipe fitting. There is a stop bar 10 inside the pipe body 1. Insert the tape measure from one end of the pipe body 1 and touch the stop bar 10 to measure the socket depth of the pipe fitting.

[0056] Then use a marker to draw lines on the outer surface of the polyethylene pipe according to the measured depth. Then install the grinder with louver blades to grind the oxide layer at the marked part of the polyethylene pipe and the end face cut of the polyethylene pipe to prevent the exposed steel wire from damaging the copper wire on the inner wall of the pipe.

[0057] And wipe the polished polyethylene pipe surface and the inside of the pipe body 1 with a towel to ensure that no dirt and water are left before welding;

[0058] Next, hammer the polished end of the polyethylene pipe into one end of the pipe body 1 parallel or perpendicular to the same wheelbase. Repeat the same steps on the other side until it reaches the position marked with a marker.

[0059] Then insert the welding head of the electric fusion welding machine into the pipe body 1. The pipe body 1 usually has a copper foot. The welding head of the electric fusion welding machine is connected to the copper foot of the pipe body 1. Then adjust the parameters of the electric fusion welding machine according to the actual situation.

[0060] When everything is ready, press the welding button of the electric fusion welding machine to start welding;

[0061] Since the clamping ring 2 is provided, when the clamping ring 2 needs to be clamped on the surface of the pipe body 1, the legs 4 at both ends of the clamping ring 2 are moved outward to apply force to the clamping ring 2 so as to open the clamping ring 2, so that the clamping ring 2 is stretched and radially expanded, thereby driving the opening 3 to become larger;

[0062] After the opening 3 is enlarged to be larger than the diameter of the pipe body 1, the clamping ring 2 can be clamped onto the pipe body 1 from above, or after the clamping ring 2 is radially expanded to be larger than the diameter of the pipe body 1, the clamping ring 2 can be inserted into the pipe body 1 from one end of the pipe body 1, and then the legs 4 are loosened, so that the clamping ring 2 can be reset due to elastic force, thereby making the clamping ring 2 tighten the pipe body 1 through the rebound force, so that friction is generated between the inner ring of the clamping ring 2 and the outer ring of the pipe body 1, and relative rotation and slipping are not likely to occur;

[0063] After the clamping ring 2 is clamped on the pipe body 1, the support legs 4 will contact the surface of the pipe body 1 and play a supporting role to prevent the pipe body 1 from rolling;

[0064] After the pipe body 1 and the polyethylene pipe are welded together, the clamping ring 2 can be removed and used for another pipe body 1, thereby being reused.

[0065] Through this structural design, by setting the clamping ring 2, the clamping ring 2 can be clamped on the pipe body 1, so that the pipe body 1 can be placed and rolled by the support legs 4. When the unwelded pipe body 1 is stored, the pipe body 1 can be prevented from rolling around. Moreover, when the pipe body 1 is welded to the polyethylene pipe, the setting of the clamping ring 2 and the support legs 4 can prevent the pipe body 1 from rolling, making it convenient to quickly connect the welding head of the electric fusion welding machine to the copper foot of the pipe body 1, facilitating operation and avoiding manual repeated adjustment of the pipe body 1. At the same time, during the welding process, the pipe body 1 is not easy to roll due to collision.

[0066] Example 2:

[0067] This embodiment provides a bare rear-laid electric heating wire electric fusion pipe fitting, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0068] Furthermore, the lower surface of the support leg 4 and the lower side surface of the pipe body 1 are in the same plane in the horizontal direction.

[0069] With this structural design, since the lower surface of the support leg 4 and the lower side of the pipe body 1 are in the same plane in the horizontal direction, when the pipe body 1 is placed on the working plane during the welding process, the lower surface of the support leg 4 and the lower side of the pipe body 1 are in contact with the working plane, which can prevent the support leg 4 from raising the pipe body 1, facilitates coaxiality between the pipe body 1 and the polyethylene pipe, and improves the welding accuracy.

[0070] At the same time, the lower surface of the support leg 4 and the lower side surface of the pipe body 1 are in contact with the working plane, so that the contact area is larger and the effect of preventing the pipe body 1 from rolling is better.

[0071] Example 3:

[0072] This embodiment provides a bare rear-laid electric heating wire electric fusion pipe fitting, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0073] Furthermore, the positioning component includes:

[0074] The copper foot joint 5 is fixedly arranged on the upper end of the pipe body 1;

[0075] A through hole 6 is formed on the clamping ring 2 and matches the copper foot connector 5;

[0076] The copper pin connector 5 is located in the through hole 6 .

[0077] In this technical solution, when the clamping ring 2 needs to be clamped into the pipe body 1, the legs 4 at both ends of the clamping ring 2 are moved outward to apply force to the clamping ring 2 so as to open the clamping ring 2, so that the clamping ring 2 is stretched and expanded radially, thereby driving the opening 3 to become larger;

[0078] After the opening 3 becomes larger than the diameter of the pipe fitting body 1, the snap ring 2 can be clamped onto the pipe fitting body 1 from above. At this time, note that the through hole 6 of the snap ring 2 is moved towards the copper pin joint 5 of the pipe fitting body 1 to ensure that after the snap ring 2 is clamped onto the pipe fitting body 1, the copper pin joint 5 can be located within the through hole 6 of the snap ring 2.

[0079] Through this structural design, by setting the through hole 6 to cooperate with the copper pin joint 5, it is convenient to position the snap ring 2 on the pipe fitting body 1 through the contact between the through hole 6 and the copper pin joint 5, achieving the effect of preventing the snap ring 2 from moving left and right. At the same time, the setting of the through hole 6 can also prevent interference between the copper pin joint 5 and the snap ring 2.

[0080] Example 4:

[0081] This example provides an exposed post-wound electric heating wire electrofusion pipe fitting. In addition to including the technical solutions of the above examples, it also has the following technical features.

[0082] Furthermore, it also includes:

[0083] A protective cover 7;

[0084] Among them, the upper end of the copper pin joint 5 extends out of the upper surface of the snap ring 2, the protective cover 7 is covered on the upper end of the snap ring 2, and the inner ring of the protective cover 7 is in interference fit with the copper pin joint 5.

[0085] Through this structural design, by setting the protective cover 7, when the pipe fitting body 1 is stored without being fused, it can protect the copper pin joint 5 and prevent dust from falling into the copper pin joint 5 and reducing its lifespan.

[0086] Example 5:

[0087] This example provides an exposed post-wound electric heating wire electrofusion pipe fitting. In addition to including the technical solutions of the above examples, it also has the following technical features.

[0088] Furthermore, the anti-slip component includes:

[0089] An anti-slip pad 8, which is fixedly arranged on the inner ring of the snap ring 2;

[0090] Among them, when the snap ring 2 is clamped on the outer surface of the pipe fitting body 1, the inner ring of the anti-slip pad 8 is in contact with the outer surface of the pipe fitting body 1.

[0091] Through this structural design, by setting the anti-slip pad 8, after the clamping ring 2 is clamped on the outer surface of the pipe body 1, the clamping ring 2 is elastically tightened on the outer surface of the pipe body 1, so that the anti-slip pad 8 fits the outer surface of the pipe body 1. This design provides greater friction between the clamping ring 2 and the pipe body 1, so that the effect of preventing relative rotation between the clamping ring 2 and the pipe body 1 is better.

[0092] Example 6:

[0093] This embodiment provides a bare rear-laid electric heating wire electric fusion pipe fitting, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0094] Furthermore, two anti-slip pads 8 are provided, and the two anti-slip pads 8 are spaced apart on the inner ring of the clamping ring 2 , and the through hole 6 is located in the spaced apart area.

[0095] Through this structural design, since the two anti-slip pads 8 are arranged at intervals and staggered with the through holes 6, interference between the anti-slip pads 8 and the copper foot joints 5 can be avoided. At the same time, this design can also extend the overall service life of the anti-slip pads 8.

[0096] Example 7:

[0097] This embodiment provides a bare rear-laid electric heating wire electric fusion pipe fitting, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0098] Furthermore, the anti-slip pad 8 is made of high temperature resistant material.

[0099] In this technical solution, since the temperature is high when the polyethylene pipe and the pipe body 1 are hot-melt welded, the anti-slip pad 8 is selected to be a high-temperature resistant material, so that the high temperature emitted when the polyethylene pipe and the pipe body 1 are hot-melt welded is not easy to melt the anti-slip pad 8, making the overall applicability and service life of the anti-slip pad 8 longer.

[0100] Example 8:

[0101] This embodiment provides a bare rear-laid electric heating wire electric fusion pipe fitting, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0102] Furthermore, the anti-slip pad 8 is made of silicone.

[0103] In this technical solution, since the temperature during hot-melt welding of the polyethylene pipe and the pipe body 1 can reach between 200°C and 240°C, the anti-slip pad 8 is made of silicone material;

[0104] Silicone materials can generally withstand temperatures up to 300 °C, making the non-slip mat 8 more durable and having a longer service life. At the same time, silicone has good elasticity and flexibility, so that it can adapt to the deformation of the snap ring 2, and the overall adaptability is better.

[0105] Embodiment 9:

[0106] This embodiment provides an exposed post-wound electric heating wire electrofusion pipe fitting. In addition to including the technical solutions of the above embodiments, it also has the following technical features.

[0107] Furthermore, it further includes:

[0108] Dust-proof cloths 9, there are two of them, and the two dust-proof cloths 9 are respectively wrapped around both ends of the pipe fitting body 1;

[0109] Wherein, when the snap ring 2 is clamped on the outer surface of the pipe fitting body 1, the inner ring of the non-slip mat 8 is in contact with the outer surface of the dust-proof cloth 9.

[0110] In this technical solution, by providing the dust-proof cloth 9, which is a flexible cloth material, after the pipe fitting body 1 is produced, the dust-proof cloth 9 can be wrapped around both ends of the pipe fitting body 1, and the dust-proof cloth 9 can be tightened by the snap ring 2, achieving a dust-proof effect, thus preventing dust or insects from entering the inside of the pipe fitting body 1, making the overall storage effect of the pipe fitting body 1 better, and avoiding the appearance of defective products due to long-term storage.

[0111] The embodiments of the present application have been described above in conjunction with the accompanying drawings. Without conflict, the embodiments in the specification of the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all of them belong to the protection scope of the present application.

Claims

1. An exposed post-cloth electric heating wire electrofusion fitting, comprising a fitting body (1), characterized in that, Also includes: There are two clamping rings (2), and the two clamping rings (2) are respectively sleeved on the two ends of the pipe body (1); An opening (3), the lower end of the clamping ring (2) has an opening (3), which is used to clamp the clamping ring (2) on the outer surface of the pipe body (1); Support legs (4), with support legs (4) fixedly provided at both left and right ends of the clamping ring (2); An anti-slip component is provided between the clamping ring (2) and the pipe body (1); A positioning assembly, wherein the clamping ring (2) and the pipe body (1) are positioned by the positioning assembly; The clamping ring (2) is made of an elastic material. When the clamping ring (2) is sleeved on the pipe body (1), the clamping ring (2) clamps the outer surface of the pipe body (1) by elasticity, and the opening (3) can become larger as the clamping ring (2) is expanded.

2. The electrofusion fitting with an exposed post-cloth electric heating wire according to claim 1, wherein: The lower surface of the support leg (4) and the lower side surface of the pipe body (1) are located in the same plane in the horizontal direction.

3. The electrofusion fitting with an exposed rear cloth heating wire according to claim 2, characterized in that, The positioning component includes: A copper foot connector (5) is fixedly mounted on the upper end of the pipe body (1); A through hole (6) is provided on the clamping ring (2), and the through hole (6) matches the copper foot connector (5); Wherein, the copper foot connector (5) is located in the through hole (6).

4. The electrofusion fitting with an exposed rear cloth heating wire according to claim 3, characterized in that, Also includes: Protective cover (7); The upper end of the copper foot connector (5) extends out from the upper surface of the clamping ring (2), the protective cover (7) is provided on the upper end of the clamping ring (2), and the inner ring of the protective cover (7) is interference-fitted with the copper foot connector (5).

5. The electrofusion fitting with an exposed post-heating wire according to claim 4, wherein, The anti-slip component comprises: An anti-slip pad (8) fixedly arranged on the inner ring of the snap ring (2); When the clamping ring (2) is clamped on the outer surface of the pipe body (1), the inner ring of the anti-slip pad (8) contacts the outer surface of the pipe body (1).

6. The electrofusion fitting with an exposed post-heating wire according to claim 5, characterized in that: Two anti-slip pads (8) are provided, and the two anti-slip pads (8) are arranged at intervals on the inner ring of the clamping ring (2), and the through hole (6) is located in the intervals.

7. An exposed post-wired electric heating wire electrofusion fitting according to claim 6, characterized in that: The anti-slip pad (8) is made of high temperature resistant material.

8. A post-exposure cloth electric heating wire electrofusion fitting according to claim 7, characterized in that: The anti-slip pad (8) is made of silica gel.

9. The electrofusion fitting with an exposed rear cloth electric heating wire according to claim 8, wherein, Also includes: Dustproof cloths (9), which are provided in pairs, and the two dustproof cloths (9) are respectively wrapped around the two ends of the pipe body (1); When the clamping ring (2) is clamped on the outer surface of the pipe body (1), the inner ring of the anti-slip pad (8) contacts the outer surface of the dustproof cloth (9).

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