Electric heating sleeve for thermal pipe joint

Abstract

The utility model provides a kind of electric heat melting sleeve for thermal insulation pipeline interface, it is related to pipeline construction technical field, including the electric heat melting sleeve for connecting pipeline, two movable connecting pieces are sleeved on the electric heat melting sleeve, the connecting piece includes clamp, both sides of the gap of the clamp are fixedly connected with connecting plate, and one side of the connecting plate close to another connecting plate is fixedly connected with flexible connecting band;The utility model is equipped with connecting plate, flexible connecting band, limit slot and buckle, when using, after flexible connecting band is pulled through connecting plate, flexible connecting band can only move in one direction by buckle cooperation, and flexible connecting band moves and will drive two connecting plates close, makes clamp clamping pipeline and electric heat melting sleeve connecting place, completes the connection of electric heat melting sleeve and pipeline, need not rotate screw rod to be fixed, reduce the fixing difficulty of pipeline and electric heat melting sleeve, improve the fixing efficiency of pipeline and electric heat melting sleeve.

Description

Technical Field

[0001] This utility model relates to the field of pipeline construction technology, and in particular to an electrofusion sleeve for insulated pipeline joints. Background Technology

[0002] Electrofusion sleeves are connecting materials used for insulated pipes or heating networks. They are mainly made of polyethylene (PE) sheets as the base material, and are manufactured by laminating special electrothermal wire mesh through processes such as mesh covering, bending, and rolling. Existing electrofusion sleeves mainly include an electrofusion sleeve body and two fastening rings for fixing the electrofusion sleeve body. The open ends of the two fastening rings are connected by bolts. A protective component is also included, located on the two fastening rings, for heat preservation and protection during the welding process of the electrofusion sleeve body. The protective component includes a protective ring located on the side of the fastening rings near the welding area of ​​the electrofusion sleeve body. The protective ring is connected to the fastening rings via a telescopic component. A protective groove is formed on the side of the protective ring near the side wall of the electrofusion sleeve body, and a rubber air bladder is placed inside the groove. The protective ring is equipped with an inflation component for inflating the rubber air bladder. However, after connecting the pipe, the above device requires rotating a screw for fixing, making the fixing relatively difficult and inefficient. Utility Model Content

[0003] To address the shortcomings of the existing technology, this utility model proposes an electrofusion sleeve for insulated pipe interfaces.

[0004] The technical solution of this utility model is implemented as follows:

[0005] An electrofusion sleeve for connecting insulated pipes includes an electrofusion kit for connecting pipes. Two movable connectors are fitted onto the electrofusion kit. Each connector includes a clamp, and connecting plates are fixedly connected to both sides of the clamp's notch. A flexible connecting strip is fixedly connected to one of the connecting plates near the other connecting plate. A through-hole is formed on the other connecting plate. The flexible connecting strip moves through the first insertion hole, and symmetrically recessed on both sides along its length to form limiting grooves. Two buckles are symmetrically fixedly connected to the connecting plate, and the buckles match the limiting grooves. The first insertion hole is located between the two buckles.

[0006] Preferably, the buckle has a through second insertion hole, and two limiting rods are slidably connected to one side of one of the connecting plates, the limiting rods matching the second insertion hole.

[0007] Preferably, a pull ring is fixedly connected to one end of the limiting rod.

[0008] Preferably, the electrofusion kit includes a tube body, an electric heating mesh is provided on the inner wall of the tube body, and an external wire is provided on the outside of the tube body, with one end of the external wire extending into the inside of the tube body and communicating with the electric heating mesh.

[0009] Preferably, the free end of the flexible connecting strip forms a through-hole.

[0010] Preferably, a rubber pad is adhered to the inner wall of the clamp, and the outer peripheral surface of the rubber pad is convex to form anti-slip ridges.

[0011] Preferably, the inner diameter of the rubber pad gradually decreases from one side to the side closer to the tube body.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. This utility model, through the setting of connecting plates, flexible connecting belts, limiting grooves and buckles, allows the flexible connecting belt to be pulled after passing through the connecting plates during use. The buckles ensure that the flexible connecting belt can only move in one direction. When the flexible connecting belt moves, it will drive the two connecting plates closer together, so that the clamps tighten the connection between the pipe and the electrofusion kit, thus completing the connection between the electrofusion kit and the pipe. There is no need to rotate the screw for fixing; simply pulling the flexible connecting belt is sufficient. This reduces the difficulty of fixing the pipe and the electrofusion kit and improves the fixing efficiency.

[0014] 2. By setting a limiting rod and a second insertion hole, this utility model allows the limiting rod to be pushed into the second insertion hole on the buckle after the clamp tightens the pipe and the electrofusion kit. This causes one end of the limiting rod to protrude from the other end of the second insertion hole, thereby limiting the buckle and the flexible connecting strip and preventing them from loosening. This further reduces the difficulty of fixing the pipe and the electrofusion kit and further improves the fixing efficiency of the pipe and the electrofusion kit. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a perspective view of the present utility model;

[0017] Figure 2 This is a perspective view of the present invention when it is separated;

[0018] Figure 3 This is a perspective view of the electrofusion kit of this utility model;

[0019] Figure 4 This is one of the cross-sectional views of the connector of this utility model;

[0020] Figure 5 This is a second sectional view of the connector of this utility model;

[0021] Figure 6 This is an enlarged view of part A in section 4;

[0022] Figure 7 This is an enlarged view of section B in diagram 5;

[0023] Figure 8 This is an enlarged view of section C in section 5;

[0024] In the diagram: 1. Electrofusion kit; 11. Pipe body; 12. Heating grid; 13. External wire; 2. Connector; 21. Clamp; 22. Connecting plate; 23. Flexible connecting strip; 24. Limiting groove; 25. Pull hole; 26. Buckle; 27. Limiting rod; 28. Rubber pad; 29. ​​First insertion hole; 210. Pull ring; 211. Second insertion hole. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] like Figures 1-8 As shown, an electrofusion sleeve for a thermal insulation pipe interface includes an electrofusion kit 1 for connecting pipes. Two movable connectors 2 are fitted on the electrofusion kit 1. Each connector 2 includes a clamp 21. Connecting plates 22 are fixedly connected to both sides of the notch of the clamp 21. A flexible connecting strip 23 is fixedly connected to one side of the connecting plate 22 near the other connecting plate 22. A through first insertion hole 29 is opened on the other connecting plate 22. The flexible connecting strip 23 moves through the first insertion hole 29. The flexible connecting strip 23 has symmetrical recesses on both sides along its own length direction to form limiting grooves 24. Two buckles 26 are symmetrically fixedly connected to the connecting plate 22. The buckles 26 match the limiting grooves 24. The first insertion hole 29 is located between the two buckles 26.

[0027] With the above technical solution, when connecting the pipe to the electrofusion kit 1, the pipe is placed on one side of the electrofusion kit 1 until the outer surface of the pipe is inserted into the electrofusion kit 1. The clamp 21 is pulled to move relative to the electrofusion kit 1 until the clamp 21 blocks the connection between the pipe and the electrofusion kit 1. One end of the flexible connecting strap 23 is passed through the first insertion hole 29 on the connecting plate 22 and the flexible connecting strap 23 is pulled to move. When the flexible connecting strap 23 moves, it will drive the connecting plate 22 to move closer to the other connecting plate 22. And through the cooperation of the buckle 26 and the limiting groove 24, the flexible connecting strap 23 can only move in one direction, so that the clamp 21 is tightened, and then the clamp 21 clamps the connection between the pipe and the electrofusion kit 1. After the connection between the pipe and the electrofusion kit 1 is fixed, the output line of the welding machine (not shown in the figure) is connected to the electrofusion kit 1. The welding machine works to heat melt the position where the electrofusion kit 1 contacts the pipe, so that the electrofusion kit 1 is connected to the pipe.

[0028] After clamp 21 tightens the pipe and electrofusion kit 1, to prevent accidental loosening of the connection, such as... Figure 1 , Figure 2 , Figures 4-8 As shown, the buckle 26 has a through second insertion hole 211, and two limiting rods 27 are slidably connected to one side of one of the connecting plates 22. The limiting rods 27 match the second insertion hole 211.

[0029] In this embodiment, when the flexible connecting strip 23 passes through the first insertion hole 29 and tightens, and the flexible connecting strip 23 cannot be pulled, the limiting rod 27 is pushed to move relative to the connecting plate 22, so that one end of the limiting rod 27 is inserted into the second insertion hole 211 on the buckle 26 until one end of the limiting rod 27 moves out from the other end of the second insertion hole 211, thereby limiting the buckle 26 so that the position of the buckle 26 cannot move, thereby preventing the flexible connecting strip 23 from loosening, making the clamp 21 more secure when clamping the connection between the pipe and the electrofusion kit 1, and further improving the stability of the device after installation.

[0030] Furthermore, in this utility model, to make the limiting rod 27 easy to pull, such as Figure 1 , Figure 4 and Figure 8 As shown, a pull ring 210 is fixedly connected to one end of the limiting rod 27.

[0031] In this embodiment, when a person needs to pull the limit rod 27, the pull ring 210 is used to make the limit rod 27 easy to pull, thereby improving the convenience of using the limit rod 27.

[0032] Specifically, in one embodiment, regarding the aforementioned electrofusion kit 1, as... Figures 1-3As shown, the electrothermal fusion kit 1 includes a tube body 11, an electric heating mesh 12 is provided on the inner wall of the tube body 11, and an external wire 13 is provided on the outside of the tube body 11. One end of the external wire 13 extends into the inside of the tube body 11 and communicates with the electric heating mesh 12.

[0033] In this embodiment, when connecting the pipe body 11 to the electrofusion kit 1, the pipe is placed on one side of the pipe body 11 and pushed, so that the outer surface of the pipe is inserted into the inside of the pipe body 11, and the outer surface of the pipe contacts the electrothermal mesh 12 on the inner wall of the pipe body 11. The clamp 21 is pulled to move along the length direction of the pipe body 11 and the pipe until the clamp 21 blocks the connection between the pipe body 11 and the pipe. The flexible connecting strip 23 on one of the connecting plates 22 is pulled, so that the free end of the flexible connecting strip 23 passes through the first insertion hole 29 on the other connecting plate 22, and the free end of the flexible connecting strip 23 is pulled to move. When the flexible connecting belt 23 moves, it will drive the connecting plate 22 to move closer to the other connecting plate 22. During the movement, the flexible connecting belt 23 can only move in one direction when it is engaged by the buckle 26, so that the distance between the two connecting plates 22 will not increase, thereby keeping the clamp 21 in a tight state and clamping the connection between the pipe and the pipe body 11. After the connection between the pipe and the pipe body 11 is fixed, the output line of the welding machine (not shown in the figure) is connected to the external wire 13 on the pipe body 11. The welding machine is used to heat melt the position where the pipe body 11 contacts the pipe, so that the pipe body 11 is connected to the pipe.

[0034] To facilitate the pulling of the flexible connecting belt 23, such as Figures 1-5 As shown, the free end of the flexible connecting strip 23 forms a through-hole 25.

[0035] In this embodiment, when a person needs to pull the flexible connecting belt 23, the pull hole 25 is used to make the flexible connecting belt 23 easy to pull.

[0036] In addition, in this utility model, in order to improve the tightness of the clamp 21 when fixing the pipe, such as Figures 1-5 As shown, a rubber pad 28 is bonded to the inner wall of the clamp 21, and the outer circumferential surface of the rubber pad 28 protrudes to form anti-slip ridges.

[0037] In this embodiment, when the pipe is inserted into the inner wall of the pipe body 11, the rubber pad 28 and the anti-slip protrusion work together to make the connection between the pipe and the pipe body 11 more secure.

[0038] Furthermore, in order to further improve the tightness of pipe fixing, such as Figures 4-5 As shown, the inner diameter of the rubber pad 28 gradually decreases from one side to the side closer to the tube body 11.

[0039] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An electrofusion sleeve for insulated pipe joints, characterized in that: The device includes an electrofusion kit (1) for connecting pipes. The electrofusion kit (1) is fitted with two movable connectors (2). Each connector (2) includes a clamp (21). Both sides of the notch of the clamp (21) are fixedly connected to a connecting plate (22). One of the connecting plates (22) is fixedly connected to a flexible connecting strip (23) on the side of the other connecting plate (22). The other connecting plate (22) has a through-hole (29). The flexible connecting strip (23) moves through the first insertion hole (29). Both sides of the flexible connecting strip (23) are recessed along its own length to form a limiting groove (24). Two buckles (26) are symmetrically fixedly connected to the connecting plate (22). The buckles (26) match the limiting grooves (24). The first insertion hole (29) is located between the two buckles (26).

2. The electrofusion sleeve for insulated pipe joints according to claim 1, characterized in that: The buckle (26) has a through second insertion hole (211), and one of the connecting plates (22) has two limiting rods (27) slidably connected to one side, and the limiting rods (27) match the second insertion hole (211).

3. The electrofusion sleeve for insulated pipe joints according to claim 2, characterized in that: One end of the limiting rod (27) is fixedly connected to a pull ring (210).

4. The electrofusion sleeve for insulated pipe joints according to any one of claims 1-3, characterized in that: The electrofusion kit (1) includes a tube (11), the inner wall of which is provided with an electric heating mesh (12), and an external wire (13) is provided on the outside of the tube (11). One end of the external wire (13) extends into the inside of the tube (11) and communicates with the electric heating mesh (12).

5. The electrofusion sleeve for insulated pipe joints according to any one of claims 1-3, characterized in that: The free end of the flexible connecting strip (23) forms a through hole (25).

6. The electrofusion sleeve for insulated pipe joints according to claim 4, characterized in that: The inner wall of the clamp (21) is bonded with a rubber pad (28), and the outer peripheral surface of the rubber pad (28) is convex to form anti-slip ridges.

7. The electrofusion sleeve for insulated pipe joints according to claim 6, characterized in that: The inner diameter of the rubber pad (28) gradually decreases from one side to the side closer to the tube body (11).

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