Device and method for wrapping an insulating protection sleeve around an electric wire

Abstract

The present invention discloses a device and a method for wrapping an insulating protection sleeve around an electric wire. The device is made of an electrically insulating material and includes a U-shaped outer wall, a U-shaped inner wall disposed inside the U-shaped outer wall and connected to the U-shaped outer wall, an extension portion extending rearward from the rear end of the U-shaped inner wall, and a turning portion disposed inside the U-shaped outer wall; the U-shaped inner wall encloses a wire threading channel, and a U-shaped channel is formed between the U-shaped inner wall and the U-shaped outer wall; the U-shaped inner wall includes a first side wall, a second side wall opposite to the first side wall, and a curved wall connecting the lower end of the first side wall and the lower end of the second side wall. A first part of the U-shaped channel is formed between the first side wall and the U-shaped outer wall, and the turning portion is opposite to the rear end port of the first part and forms a gap; the extension portion extends rearward from the rear end of the second side wall, and the upper edge of the extension portion has a guiding portion that is rearward relative to the guiding inclined surface. When the device is moved forward, the insulating protection sleeve can be continuously wrapped around the bare electric wire, and the working efficiency is high.

Description

Technical Field

[0001] The present invention relates to the field of wire insulation protection, and particularly to a device for wrapping an insulation protection sleeve around a bare wire by wrapping the insulation protection sleeve around the bare wire. Background Art

[0002] In China, bare wires are laid for high-voltage and low-voltage power transmission and distribution network overhead lines. The overhead bare wires have been playing an important role in the distribution network lines in China due to their low cost, convenient erection and maintenance. However, the bare wires also bring a series of problems. For example, lightning strikes, rain, wet fog, natural and industrial pollution, etc. can also damage or reduce the strength of the overhead lines. Over time, it will cause irreversible effects and even power outages; there are also electromagnetic environment interference problems with the overhead lines. Coupled with the current urban-rural integration, the original rural regulations are accelerating urbanization construction. Due to the complex distribution network environment, many lines are close to buildings, trees, fish ponds, etc. These factors seriously affect the reliability of the distribution network and also pose a potential risk of personal electric shock accidents.

[0003] Therefore, an insulation protection sleeve is often required to be wrapped outside the overhead bare wire. The applicant has developed an insulation protection sleeve made of silica gel material. When applying this insulation protection sleeve, how to continuously and efficiently wrap this insulation protection sleeve around a live slender bare wire has become a new problem to be solved. Summary of the Invention

[0004] To solve at least one technical problem of the prior art, the present invention provides a device for wrapping an insulation protection sleeve around a wire.

[0005] According to one aspect of the present invention, there is provided a device for wrapping an insulation protection sleeve around a wire, made of an electrically insulating material, which includes a U-shaped outer wall, a U-shaped inner wall disposed inside the U-shaped outer wall and connected to the U-shaped outer wall, an extension portion extending rearward from the rear end of the U-shaped inner wall, and a turning portion disposed inside the U-shaped outer wall; the U-shaped inner wall encloses a wire threading channel for threading a wire, and a U-shaped channel for threading the insulation protection sleeve and separating its two free edges is formed between the U-shaped inner wall and the U-shaped outer wall; the U-shaped inner wall includes a first side wall, a second side wall opposite to the first side wall, and a curved wall connecting the lower end of the first side wall and the lower end of the second side wall; a first part of the U-shaped channel is formed between the first side wall and a part of the U-shaped outer wall opposite thereto, and the turning portion is spaced behind the rear end port of the first part for changing the direction of one free edge of the insulation protection sleeve towards the wire; the extension portion extends rearward from the rear end of the second side wall, and the upper edge of the extension portion has a guiding portion which is arranged behind the turning portion and can gradually guide the other free edge of the insulation protection sleeve towards the wire.

[0006] In some embodiments, the side surface of the turning portion has a rear end port facing the first portion and a guiding inclined surface of the wire threading channel.

[0007] In some embodiments, the guiding portion gradually extends inward while extending rearward.

[0008] In some embodiments, the guiding portion is spatially curved inward, and as it extends rearward, the curved area widens.

[0009] In some embodiments, a protruding retaining strip is provided inside the guiding portion.

[0010] In some embodiments, the extending portion further includes an arc portion formed by extending rearward from a part of the curved wall.

[0011] In some embodiments, it further includes a handle provided on the U-shaped outer wall. The handle includes a curved portion integrally connected to the front end of the U-shaped outer wall at one end and arched forward, and a straight handle portion extending rearward from the other end of the curved portion.

[0012] In some embodiments, it further includes a mouth portion extending forward from the front end of the curved wall, and the mouth portion gradually tapers.

[0013] In some embodiments, the U-shaped outer wall includes a third side wall, a fourth side wall opposite to the third side wall, and a bottom wall connecting the lower end of the third side wall and the lower end of the fourth side wall; the first side wall is opposite to the third side wall, and a first part of the U-shaped channel is formed between them; the second side wall is opposite to the fourth side wall, and a second part of the U-shaped channel is formed between them; the curved wall is opposite to the bottom wall, and a third part of the U-shaped channel is formed between them; the upper end of the first side wall is connected to the upper end of the third side wall, and the upper end of the second side wall is connected to the upper end of the fourth side wall.

[0014] According to another aspect of the present invention, there is provided a method of wrapping an insulating protection sleeve around an electric wire, including the following steps: providing a bare electric wire, an insulating protection sleeve, and a device for wrapping the insulating protection sleeve around the electric wire, wherein the insulating protection sleeve is electrically insulating and elastic, naturally curls around a longitudinal axis, the insulating protection sleeve has opposite first and second free edges extending along the longitudinal axis, and in the naturally curled state, the first free edge is located outside the second free edge; passing the bare electric wire through the wire threading channel, opening one end of the insulating protection sleeve, and inserting it into the front end port of the U-shaped channel, and the first free edge passes through the first part; moving the device forward, keeping the second free edge in the original advancing direction through the extending portion, and pushing the first free edge towards the bare electric wire through the turning portion so that the first free edge is first wrapped around the bare electric wire; during the continuous forward movement, guiding the second free edge towards the bare electric wire through the guiding portion on the upper edge of the extending portion so that the second free edge is wrapped outside the first free edge.

[0015] The beneficial effects of the device and method of the present invention include at least: when the bare wire passes through the threading channel, the U-shaped inner wall opens the insulating protective sleeve, and in the process of moving the device forward, the steering part pushes one free edge of the insulating protective sleeve toward the bare wire, so that the free edge is turned and first wrapped on the bare wire, and then the insulating protective sleeve itself is used to guide the other free edge of the insulating protective sleeve to the bare wire through the guiding part of the extension part and wrap it. When the device is moved forward, the insulating protective sleeve can be continuously wrapped on the bare wire, and the operation efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional view of a flanging device according to one embodiment of the present invention.

[0017] Figure 2 It is a three-dimensional view of a flanging device according to one embodiment of the present invention.

[0018] Figure 3 It is a front view of a flanging tool according to one embodiment of the present invention.

[0019] Figure 4 A top view of a flanging tool according to an embodiment of the present invention.

[0020] Figure 5 It is a schematic diagram of the cross section of the insulating protective sleeve in the naturally curled state.

[0021] Figure 6 Schematic diagram of the cross section of the insulating sleeve wrapped around the bare conductor DETAILED DESCRIPTION

[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0023] The device for wrapping the insulating protective sleeve on the electric wire comprises a U-shaped outer wall 1, a U-shaped inner wall 2 disposed inside and connected to the U-shaped outer wall 1, an extension portion 3 extending backward from the rear end of the U-shaped inner wall 2, and a turning portion 5 disposed on the inner side of the U-shaped outer wall 1. The device for wrapping the insulating protective sleeve on the electric wire is made of an electrically insulating material, such as commonly used electrically insulating plastics.

[0024] The U-shaped outer wall 1 includes a third side wall 11, a fourth side wall 12 opposite to the third side wall 11, and a bottom wall 13 connecting the lower end of the third side wall 11 and the lower end of the fourth side wall 12. The third side wall 11, the bottom wall 13, and the fourth side wall 12 are connected in sequence to form a U shape. The U-shaped inner wall 2 includes a first side wall 21, a second side wall 22 opposite to the first side wall 21, and a curved wall 23 connecting the lower end of the first side wall 21 and the lower end of the second side wall 22. The first side wall 21, the curved wall 23, and the second side wall 22 are connected in sequence to form a U shape and enclose a wire threading channel 6. Preferably, the curved wall 23 is semi-circular and is adapted to the shape of the round tube to be flanged.

[0025] The U-shaped inner wall 2 is disposed inside the U-shaped outer wall 1, that is, the U-shaped outer wall 1 is disposed on the periphery of the U-shaped inner wall 2. Specifically, the first side wall 21 is opposite to the third side wall 11, the second side wall 22 is opposite to the fourth side wall 12, and the curved wall 23 is opposite to the bottom wall 13. The upper end of the U-shaped inner wall 2 is connected to the upper end of the U-shaped outer wall 1. Specifically, the upper end of the first side wall 21 is connected to the upper end of the third side wall 11, and the upper end of the second side wall 22 is connected to the upper end of the fourth side wall 12.

[0026] A U-shaped channel 7 is formed between the U-shaped inner wall 2 and the U-shaped outer wall 1. Specifically, a first part 71 of the U-shaped channel 7 is formed between the first side wall 21 and the third side wall 11, a second part 72 of the U-shaped channel 7 is formed between the second side wall 22 and the fourth side wall 12, and a third part 73 of the U-shaped channel 7 is formed between the curved wall 23 and the bottom wall 13.

[0027] The length of the U-shaped inner wall 2 is less than the length of the U-shaped outer wall 1, and the U-shaped channel 7 is formed between the front end portion of the U-shaped outer wall 1 and the U-shaped inner wall 2. The U-shaped channel 7 has a front end port and a rear end port. The turning portion 5 is integrally disposed inside the third side wall 11 and is located behind the rear end port of the first part 71. The turning portion 5 is opposite to the rear end port of the first part 71 and there is a certain interval between them. Further, the side surface of the turning portion 5 has a guiding inclined surface 51 facing the rear end port and the wire threading channel 6. Specifically, the guiding inclined surface 51 extends obliquely backward from the front end of the turning portion 5. When a part of the insulating protection sleeve 8 comes out from the rear end port of the first part 71, this part of the insulating protection sleeve 8 is guided by the guiding inclined surface 51 to the wire threading channel 6.

[0028] The extension part 3 is integrally connected to the rear end of the U-shaped inner wall 2. Specifically, the extension part 3 extends rearward from the rear end of the second side wall 22. Preferably, the extension part 3 further includes an arc-shaped part extending rearward from a part of the curved wall 23. Optionally, about half of the curved wall 23 extends rearward to form the arc-shaped part of the extension part 3. A second part 72 of the U-shaped channel 7 is formed between the second side wall 22 and the fourth side wall 12 of the U-shaped outer wall 1, and the channel formed between the part of the extension part 3 extending rearward from the rear end of the second side wall 22 and the fourth side wall 12 of the U-shaped outer wall 1 is an extension of the second part 72.

[0029] The upper edge of the extension part 3 has a guiding part 31 that is rearward relative to the turning part 5. Further, the guiding part 31 gradually extends inward while extending rearward. For example, the guiding part 31 is curved inward in space, and the curved area becomes wider as it extends rearward.

[0030] The device for wrapping an insulating protection sleeve around an electric wire in this embodiment is used to continuously wrap the insulating protection sleeve 8 around a bare electric wire. The elastic insulating protection sleeve 8 is naturally curled around the longitudinal axis, and it includes a first free edge 81 and a second free edge 82 that extend along the longitudinal axis and are opposite to each other, and the two free edges are curved and overlap each other. In the naturally curled state, the first free edge 81 is located outside the second free edge 82. After separating the two free edges of the insulating protection sleeve 8 with an external force, the bare electric wire is placed into the insulating protection sleeve 8. Please refer to Figure 6, if the second free edge 82 is turned to the outside of the first free edge 81, the insulating protection sleeve 8 will be deformed, causing the first free edge 81 to have a tendency to recover outward, and the second free edge 82 to have a tendency to recover inward, resulting in the first free edge 81 and the second free edge 82 exerting forces on each other, making the insulating protection sleeve 8 wrap around the bare wire 10 and not easily open and fall off. The usage process of the device for wrapping the insulating protection sleeve around the wire is as follows: Separate the two free edges from one end of the insulating protection sleeve 8 to make the insulating protection sleeve 8 roughly U-shaped, and then insert the insulating protection sleeve 8 into the U-shaped channel 7, where the first free edge 81 penetrates into the first part 71 of the U-shaped channel 7, and the second free edge 82 penetrates into the second part 72 of the U-shaped channel 7; Keep the bare wire passing through the wire threading channel 6; Move the device forward, and the U-shaped channel 7 can continuously separate the two free edges of the insulating protection sleeve 8; After the first free edge 81 continuously comes out from the rear end port of the first part 71, its traveling direction is changed by the guiding inclined surface 51 and it is pushed towards the bare wire and wrapped around the bare wire, while the second free edge 82 is held by the front half of the extension part 3 and does not approach the bare wire; The guiding part 31 gradually extends inwards, so under the action of its own elasticity, the second free edge 82 gradually approaches the bare wire along the guiding part 31; Since the guiding part 31 is arranged behind the guiding inclined surface 51, after the first free edge 81 is wrapped around the bare wire first, the second free edge 82 will gradually be guided towards the bare wire by the guiding part 31 and finally wrapped around the outside of the first free edge 81. During the wrapping process, the second free edge 82 is on the outside of the extension part 3, and the first free edge 81 is on the inside of the extension part. Since the guiding part 31 gradually extends towards the bare wire from front to back, during the movement of the device, the guiding part 31 can not only gradually guide the second free edge 82 towards the bare wire, but also gradually press the first free edge 81 towards the bare wire. By moving forward the device for wrapping the insulating protection sleeve around the wire, the insulating protection sleeve 8 can be continuously and efficiently wrapped around the bare wire.

[0031] In some embodiments, please refer to Figure 3 , a protruding stop strip 32 is provided on the inner side of the guiding part 31. Preferably, the stop strip 32 extends along the inner side of the upper edge of the guiding part 31, and can further limit the first free edge 81 inside the extension part 3 during the process of the first free edge 81 wrapping the wire.

[0032] In some embodiments, a mouth part 4 is further included. The mouth part 4 extends forward from the front end of the bending wall 23, and the mouth part 4 gradually tapers. The gradually tapering shape is beneficial for the mouth part 4 and the U-shaped inner wall 2 to penetrate inside the insulating protection sleeve.

[0033] In some embodiments, the device further includes a handle 9 provided on the U-shaped outer wall 1. For example, the handle 9 includes a curved portion 91 integrally connected at one end to the front end of the U-shaped outer wall 1 and arched forward, and a straight handle portion 92 extending rearward from the other end of the curved portion 91. The handle 9 arches forward, and when the handle 9 is held and the device is moved forward, the handle 9 is not easily deformed.

[0034] According to another aspect of the present invention, a method for wrapping an insulating protective sleeve around an electric wire is provided, including the following steps: providing a bare electric wire, an insulating protective sleeve, and a device, wherein the insulating protective sleeve is electrically insulating and elastic, and naturally curls around a longitudinal axis. The insulating protective sleeve has opposite first free edge 81 and second free edge 82 extending along the longitudinal axis. In the naturally curled state, the first free edge 81 is located outside the second free edge 82; passing the bare electric wire through the wire threading channel, opening one end of the insulating protective sleeve, and inserting it into the front end port of the U-shaped channel 7, and the first free edge 81 passes through the first part 71; moving the device forward, keeping the second free edge 82 in the original advancing direction through the extension portion 3, and pushing the first free edge 81 towards the bare electric wire through the turning portion 5 so that the first free edge 81 first wraps around the bare electric wire; during the continuous forward movement, guiding the second free edge 82 towards the bare electric wire through the guiding portion 31 on the upper edge of the extension portion 3 so that the second free edge 82 wraps around the outside of the first free edge 81.

[0035] The above are only some embodiments of the present invention. For those of ordinary skill in the art, without departing from the inventive concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A device for wrapping an insulating protective sleeve around an electric wire, made of an electrically insulating material, characterized in that, It includes a U-shaped outer wall (1), a U-shaped inner wall (2) disposed within and connected to the U-shaped outer wall (1), an extension portion (3) extending rearward from the rear end of the U-shaped inner wall (2), and a turning portion (5) disposed inside the U-shaped outer wall (1); The U-shaped inner wall (2) encloses a wire threading channel (6) for threading the wire, and a U-shaped channel (7) is formed between the U-shaped inner wall (2) and the U-shaped outer wall (1) for threading the insulating protection sleeve and separating its two free edges; The U-shaped inner wall (2) includes a first side wall (21), a second side wall (22) opposite to the first side wall (21), and a curved wall (23) connecting the lower end of the first side wall (21) to the lower end of the second side wall (22); A first part (71) of the U-shaped channel (7) is formed between the first side wall (21) and a part of the U-shaped outer wall (1) opposite thereto. The turning portion (5) is spaced behind the rear end port of the first part (71) and can deflect one free edge of the insulating protection sleeve towards the wire. The side surface of the turning portion (5) has a guiding inclined surface (51) facing the rear end port of the first part (71) and the wire threading channel (6); The extension portion (3) extends rearward from the rear end of the second side wall (22). The upper edge of the extension portion (3) has a guiding portion (31) which is arranged behind the turning portion (5) and can gradually guide the other free edge of the insulating protection sleeve towards the wire. The guiding portion (31) extends rearward while gradually extending inwards.

2. The device for wrapping an insulating protective sleeve around an electric wire according to claim 1, characterized in that, The guiding portion (31) is curved inwards in space, and the curved area widens as it extends rearward.

3. The device for wrapping an insulating protective sleeve around an electric wire according to claim 1, characterized in that, A protruding retaining strip (32) is provided along the inner side of the upper edge of the guiding portion (31).

4. The device for wrapping an insulating protective sleeve around an electric wire according to claim 1, characterized in that, The extension portion further includes an arc portion extending rearward from a part of the curved wall (23).

5. The device for wrapping an insulating protective sleeve around an electric wire according to claim 1, characterized in that, It further includes a handle (9) provided on the U-shaped outer wall (1). The handle (9) includes a curved portion (91) integrally connected to the front end of the U-shaped outer wall (1) and arching forward, and a straight handle portion (92) extending rearward from the other end of the curved portion (91).

6. The device for wrapping an insulating protective sleeve around an electric wire according to claim 1, characterized in that, It further includes a mouth portion (4) extending forward from the front end of the curved wall (23), and the mouth portion (4) gradually tapers to a point.

7. The device for wrapping an insulating protective sleeve around an electric wire according to claim 1, characterized in that, The U-shaped outer wall (1) includes a third side wall (11), a fourth side wall (12) opposite to the third side wall (11), and a bottom wall (13) connecting the lower end of the third side wall (11) and the lower end of the fourth side wall (12); the first side wall (21) is opposite to the third side wall (11), and a first part (71) of the U-shaped channel (7) is formed therebetween; the second side wall (22) is opposite to the fourth side wall (12), and a second part (72) of the U-shaped channel (7) is formed therebetween; the curved wall (23) is opposite to the bottom wall (13), and a third part (73) of the U-shaped channel (7) is formed therebetween; the upper end of the first side wall (21) is connected to the upper end of the third side wall (11), and the upper end of the second side wall (22) is connected to the upper end of the fourth side wall (12).

8. A method for wrapping an insulating protection sleeve around an electric wire, characterized by comprising the following steps: Providing a bare electric wire, an insulating protection sleeve, and the device according to any one of claims 1-7, wherein the insulating protection sleeve (8) is electrically insulating and elastic, and naturally curls around a longitudinal axis, the insulating protection sleeve (8) has opposite first free edge (81) and second free edge (82) extending along the longitudinal axis, and in the naturally curled state, the first free edge (81) is located outside the second free edge (82); Passing the bare electric wire through the wire threading channel (6), opening one end of the insulating protection sleeve (8), and inserting it into the front end port of the U-shaped channel (7), and the first free edge (81) passes through the first part (71); Moving the device forward, keeping the second free edge (82) in the original advancing direction through the extension part (3), and pushing the first free edge (81) towards the bare electric wire through the turning part (5), so that the first free edge (81) is first wrapped around the bare electric wire; During the continuous forward movement, guiding the second free edge (82) towards the bare electric wire through the guiding part (31) on the upper edge of the extension part (3), so that the second free edge (82) is wrapped outside the first free edge (81).

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