A cable protection tube butt welding device

Abstract

The present invention relates to the technical field of cable tube welding, and specifically to a cable protection tube butt welding device, including a positioning bracket, an axial moving component, a heating component and a radial moving component. There are two positioning brackets, and the two positioning brackets are used to coaxially position two cable protection tubes. There are two axial moving components. The present invention provides a fan-shaped heating block. Since a recess is provided on one side of the fan-shaped surface of the fan-shaped heating block, and a boss is provided on the other side of the fan-shaped surface of the fan-shaped heating block, after the end face to be welded of the cable protection tube is heated, the end face to be welded of the cable protection tube will be pressed out with corresponding bosses and recesses by heat. In this way, when the welding end faces of the two cable protection tubes are butted, the bosses and recesses on the welding end faces of the cable protection tubes can be interlocked, thereby improving the torsion resistance of the cable protection tube at the welding interface.

Description

Technical Field

[0001] The invention relates to the field of cable pipe welding, in particular to a cable protection pipe butt welding device. Background Art

[0002] Cable protection tube is a kind of pipe used to provide physical protection for power cables, communication optical cables and other lines when they are laid. Its material is usually plastic (such as MPP, PVC, PE). In order to obtain a cable protection tube of sufficient length, the common practice is to butt the ends of two cable protection tubes and then weld them together to connect the two cable protection tubes.

[0003] During the specific operation, the staff first fixes the two cable protection tubes coaxially on the welding bracket, then grinds the end faces of the two cable protection tubes to be welded flat, then clamps a ring-shaped electric clamp between the end faces of the two cable protection tubes to be welded, and finally makes the two cable protection tubes close to each other along their axis so that the end faces of the cable protection tubes to be welded are close to the electric clamp, thereby increasing the hot melt length of the cable protection tubes. After the electric clamp is energized for a certain period of time, the electric clamp is removed from between the two cable protection tubes, and then the welding end faces of the two cable protection tubes are butted and maintained for a certain period of time. After the welding position of the two cable protection tubes cools down, the cable protection tubes can be taken out of the welding bracket, and the two cable protection tubes are welded together. However, the existing welding equipment has the following problems after welding the cable protection tube: the welding interface position of the cable protection tube has a low degree of bonding, and it is easy to be unsoldered by external force, so the service life is relatively low. Summary of the invention

[0004] Based on this, it is necessary to provide a cable protection tube butt welding device to address the problems existing in the current cable protection tube welding equipment, so as to solve the problem that the welding interface position of the cable protection tube has low bonding degree and is easy to come off due to external force.

[0005] The above purpose is achieved through the following technical solutions:

[0006] A cable protection tube butt welding device comprises:

[0007] There are two positioning brackets, which are used to coaxially position the two cable protection tubes;

[0008] Axial moving components, there are two axial moving components, the two axial moving components are respectively arranged at the ends of the positioning bracket, and the axial moving components are used to drive the two cable protection tubes to move closer to each other or away from each other along their axes;

[0009] A heating assembly is located between the two axially movable assemblies. The heating assembly includes a plurality of fan-shaped heating blocks. A sinking groove is provided on one side of the fan-shaped surface of the fan-shaped heating block. A boss is provided on the other side of the fan-shaped surface of the fan-shaped heating block. The sinking groove and the boss are adapted to each other. A sinking boss is provided on one side of the two rectangular surfaces of the fan-shaped heating block close to the sinking groove. The plurality of fan-shaped heating blocks are evenly distributed around the axis of the cable protection tube and two adjacent fan-shaped heating blocks are arranged in opposite directions.

[0010] The radial moving component is located outside the heating component. The radial moving component is used to drive several fan-shaped heating blocks to synchronously approach the axis of the cable protection tube so that several fan-shaped heating blocks are connected into a circumferentially closed ring structure. The radial moving component is also used to drive several fan-shaped heating blocks to synchronously move away from the axis of the cable protection tube.

[0011] In one embodiment, the positioning bracket includes a base, a support leg, a first semicircular ring and a second semicircular ring. The support leg is arranged on the upper surface of the base, the first semicircular ring opens upward and is arranged on the upper end of the support leg, and the second semicircular ring opens downward and is hinged to one end of the first semicircular ring.

[0012] In one embodiment, the axial movement assembly includes a first axial movement semicircular ring and a second axial movement semicircular ring, the first axial movement semicircular ring corresponds to the position of the first semicircular ring, the second axial movement semicircular ring corresponds to the position of the second semicircular ring, the inner circumferences of the first axial movement semicircular ring and the second axial movement semicircular ring are both embedded with rubber pads, the circumferences of the first semicircular ring and the second semicircular ring are both provided with connecting rods, the circumferences of the first axial movement semicircular ring and the second axial movement semicircular ring are both correspondingly opened with first connecting holes, the first connecting hole is provided with a first spring, the connecting rod passes through the first connecting hole and is fixedly connected to the first spring.

[0013] In one embodiment, the radial movement assembly includes a first positioning semicircular ring and a second positioning semicircular ring, the first positioning semicircular ring corresponds to the position of the first semicircular ring, the second positioning semicircular ring corresponds to the position of the second semicircular ring, and the first positioning semicircular ring and the second positioning semicircular ring are both provided with second connecting holes in the circumference, and one end of the connecting rod passing through the first connecting hole is slidably connected to the second connecting hole;

[0014] The first positioning semicircular ring and the second positioning semicircular ring are provided with a semi-ring platform at one end away from the second connecting hole, and straight guide grooves are provided at equal intervals in the circumferential direction of the semi-ring platform, and the straight guide grooves extend along the radial direction of the semi-ring platform;

[0015] The radial moving assembly also includes a guide block, which is arranged on the sector surface of the sector heating block and is slidably connected in the straight guide groove.

[0016] In one embodiment, it further comprises a first semi-cylinder and a second semi-cylinder, the first semi-cylinder and the first semi-circular ring are located in corresponding positions, the second semi-cylinder and the second semi-circular ring are located in corresponding positions, the inner circumferential wall of the first semi-cylinder and the inner circumferential wall of the second semi-cylinder are both provided with a semi-ring plate, the side of the semi-ring plate is provided with an oblique guide groove, the oblique guide groove is inclined to the radial direction of the semi-ring plate, the outer side of the semi-ring plate is provided with an outer limit ring groove, the outer limit ring groove is connected to one end of the oblique guide groove, the inner side of the semi-ring plate is provided with an inner limit ring groove, the inner limit ring groove is connected to the other end of the oblique guide groove;

[0017] A guide column is arranged on one side of the guide block away from the fan-shaped heating block, and the guide column is slidably connected in the oblique guide groove, the outer limiting ring groove and the inner limiting ring groove.

[0018] In one embodiment, guide protrusions are provided on the end walls of the first semi-cylinder and the second semi-cylinder, and guide grooves are correspondingly opened on the outer peripheral walls of the first positioning semi-circular ring and the second positioning semi-circular ring. The guide protrusions are slidably connected in the guide grooves, and the guide grooves include a first spiral groove portion, a second spiral groove portion and an arc groove portion. The arc groove portion is located between the first spiral groove portion and the second spiral groove portion and is connected in sequence, and the pitch of the first spiral groove portion is greater than the pitch of the second spiral groove portion.

[0019] In one embodiment, the diameters of the first semi-cylinder and the second semi-cylinder are configured so that when the contact surfaces of the first semi-cylinder and the second semi-cylinder are horizontal, the second semi-cylinder can follow the second semi-circle around the hinge point and move away from the first semi-cylinder synchronously.

[0020] In one embodiment, the non-hinged ends of the first semicircular ring and the second semicircular ring are provided with snap-fit ​​mechanisms.

[0021] In one embodiment, the snap mechanism includes an insertion rod and a limit plate, the insertion rod is hinged at the end of the first semicircular ring, the limit plate is arranged at the end of the insertion rod away from the first semicircular ring, and a insertion slot is opened at the end of the second semicircular ring, the diameter of the insertion rod is adapted to the width of the insertion slot, and the width of the limit plate is greater than the width of the insertion slot.

[0022] The beneficial effects of the present invention are:

[0023] The present invention provides a fan-shaped heating block. Since a groove is provided on one side of the fan-shaped surface of the fan-shaped heating block and a boss is provided on the other side of the fan-shaped surface of the fan-shaped heating block, after the end face to be welded of the cable protection tube is heated, the corresponding boss and groove will be pressed out on the end face to be welded of the cable protection tube due to heat. In this way, when the welding end faces of the two cable protection tubes are butted against each other, the boss and the groove on the welding end face of the cable protection tube can be interlocked with each other, thereby improving the torsion resistance of the welding interface of the cable protection tube. In addition, since the outer dimensions of the groove are slightly larger than those of the boss, when the boss and the groove are interlocked with each other, the molten plastic liquid at the gap position can be squeezed to form a "snap-on"-shaped stop structure, thereby improving the tensile strength of the welding interface of the cable protection tube. Therefore, the welding interface of the cable protection tube can be more tightly bonded and is less likely to come off due to external force. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is an overall schematic diagram of a cable protection tube butt welding device of the present invention;

[0025] Figure 2 It is a schematic structural diagram of a heating component and a radial moving component in a cable protection tube butt welding device of the present invention;

[0026] Figure 3 It is a structural schematic diagram of a positioning bracket in a cable protection tube butt welding device of the present invention;

[0027] Figure 4 It is a schematic diagram of the structure of the first axially movable semicircular ring in a butt welding device for a cable protection tube according to the present invention;

[0028] Figure 5 This is a schematic diagram of the guide groove structure in a cable protection tube butt welding device of the present invention;

[0029] Figure 6 It is a schematic diagram of the structure of the first positioning semicircular ring in a cable protection tube butt welding device of the present invention;

[0030] Figure 7 It is a schematic diagram of the structure of a fan-shaped heating block in a cable protection tube butt welding device of the present invention;

[0031] Figure 8 This is a schematic diagram of the first semi-cylinder structure in a cable protection tube butt welding device of the present invention;

[0032] Fig. 9 It is a schematic diagram of an open state of a cable protection tube butt welding device of the present invention;

[0033] Fig.10 It is a schematic diagram of a state before heating of a cable protection tube butt welding device of the present invention begins;

[0034] Fig.11 for Fig.10 A schematic diagram of the enlarged structure in the middle;

[0035] Fig.12 It is a schematic diagram of a heating state of a cable protection tube butt welding device of the present invention;

[0036] Fig.13 for Fig.12 Schematic diagram of the enlarged structure at B in the middle;

[0037] Fig.14 It is a schematic diagram of the cable protection tube butt welding device of the present invention in the separated state after heating is completed;

[0038] Fig.15 for Fig.14 Schematic diagram of the enlarged structure at C in the middle;

[0039] Fig.16 It is a schematic diagram of the butt-jointing state of a cable protection tube butt-jointing welding device of the present invention after heating is completed;

[0040] Fig.17 for Fig.16 Schematic diagram of the enlarged structure at D in the middle.

[0041] in:

[0042] 100, positioning bracket; 110, base; 120, support leg; 130, first semicircular ring; 140, second semicircular ring; 200, axial movement assembly; 210, first axial movement semicircular ring; 220, second axial movement semicircular ring; 230, connecting rod; 240, first connecting hole; 300, heating assembly; 310, fan-shaped heating block; 311, sink; 312, boss; 313, sink; 400, radial movement assembly; 410, first positioning semicircular ring; 420, second positioning semicircular ring; 430, second connecting rod Connecting hole; 440, semi-annular platform; 441, straight guide groove; 450, guide block; 451, guide column; 460, guide groove; 461, first spiral groove portion; 462, second spiral groove portion; 463, arc groove portion; 510, first semi-cylinder; 520, second semi-cylinder; 530, semi-annular plate; 531, oblique guide groove; 532, outer limit ring groove; 533, inner limit ring groove; 540, guide protrusion; 600, snap mechanism; 610, insertion rod; 620, limit plate; 630, slotting hole; 1000, cable protection tube. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0044] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0045] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0046] like Figure 1-Figure 17As shown, a cable protection tube butt welding device includes a positioning bracket 100, an axial moving assembly 200, a heating assembly 300 and a radial moving assembly 400. There are two positioning brackets 100, and the two positioning brackets 100 are used to coaxially position two cable protection tubes 1000. There are two axial moving assemblies 200, and the two axial moving assemblies 200 are respectively arranged at the ends of the positioning bracket 100. The axial moving assembly 200 is used to drive the two cable protection tubes 1000 to approach or move away from each other along their axes. The heating assembly 300 is located between the two axial moving assemblies 200. The heating assembly 300 includes a plurality of fan-shaped heating blocks 310. A sink groove 311 is provided on one side of the fan-shaped surface of the fan-shaped heating block 310. The fan-shaped heating block A boss 312 is provided on the other side of the fan-shaped surface 310, and the groove 311 and the boss 312 are adapted to each other. A sink 313 is provided on the two rectangular surfaces of the fan-shaped heating block 310 close to the groove 311. A plurality of fan-shaped heating blocks 310 are evenly distributed circumferentially around the axis of the cable protection tube 1000 and two adjacent fan-shaped heating blocks 310 are arranged in opposite directions. The radial moving component 400 is located on the outside of the heating component 300. The radial moving component 400 is used to drive a plurality of fan-shaped heating blocks 310 to synchronously approach the axis of the cable protection tube 1000, so that a plurality of fan-shaped heating blocks 310 are connected into a circumferentially closed ring structure. The radial moving component 400 is also used to drive a plurality of fan-shaped heating blocks 310 to synchronously move away from the axis of the cable protection tube 1000.

[0047] When in use, the staff will place the two cable protection tubes 1000 to be welded on the two positioning brackets 100 respectively, so that the two cable protection tubes 1000 are in a coaxial position, and the end faces to be welded of the two cable protection tubes 1000 are in contact with the fan-shaped surfaces of the fan-shaped heating block 310 respectively, and then start the axial moving component 200, the radial moving component 400 and the heating component 300. At this time, the axial moving component 200 drives the two cable protection tubes 1000 to approach each other, so as to increase the melting length of the section to be welded of the cable protection tube 1000. At the same time, the radial moving component 400 drives the several fan-shaped heating blocks 310 to move synchronously in the direction close to the axis of the cable protection tube 1000, so that the several fan-shaped heating blocks 310 are connected to form a circumferentially closed The fan-shaped heating blocks 310 are connected into a circumferentially closed annular structure, and the axial moving component 200 and the radial moving component 400 stop working, and the heating component 300 continues to work. After the fan-shaped heating blocks 310 continue to heat the cable protection tube 1000 for a certain period of time, the radial moving component 400 drives the fan-shaped heating blocks 310 to synchronously move away from the axis of the cable protection tube 1000. At this time, the fan-shaped heating blocks 310 no longer interfere with the mutual contact of the welding end faces of the two cable protection tubes 1000, and then the radial moving component 400 drives the two cable protection tubes 1000 to approach each other until the welding end faces of the two cable protection tubes 1000 abut against each other. After cooling for a certain period of time, the two cable protection tubes 1000 are welded together.

[0048] It can be understood that, since a recess 311 is provided on one side of the fan-shaped surface of the fan-shaped heating block 310, and a boss 312 is provided on the other side of the fan-shaped surface of the fan-shaped heating block 310, after the end face to be welded of the cable protection tube 1000 is heated, the corresponding boss 312 and recess 311 will be pressed out on the end face to be welded of the cable protection tube 1000 due to heat. In this way, when the welding end faces of the two cable protection tubes 1000 are butted, the boss 312 and recess 311 on the welding end faces of the cable protection tubes 1000 can be interlocked, thereby improving the torsion resistance at the welding interface position of the cable protection tube 1000. In addition, since the outer dimensions of the recess 311 are slightly larger than the outer dimensions of the boss 312, when the boss 312 and the recess 311 are butted, the boss 312 and the recess 311 can be interlocked. After being buckled with each other, the molten plastic liquid at the gap position can be squeezed to form a "snap-on" stop structure, thereby improving the tensile strength of the welding interface position of the cable protection tube 1000. In summary, a groove 311 is provided on one side of the fan-shaped surface of the fan-shaped heating block 310, a boss 312 is provided on the other side of the fan-shaped surface of the fan-shaped heating block 310, and the outer dimensions of the groove 311 are slightly larger than the outer dimensions of the boss 312, thereby improving the bonding degree at the welding interface position of the cable protection tube 1000, so that when the welding interface position of the cable protection tube 1000 is twisted or pulled by external force, the interface position is not easy to be desoldered, thereby achieving the effect of increasing the service life of the cable protection tube 1000 after welding.

[0049] In a further embodiment, Figure 3 As shown, the positioning bracket 100 includes a base 110, a support leg 120, a first semicircular ring 130 and a second semicircular ring 140. The support leg 120 is arranged on the upper surface of the base 110, the first semicircular ring 130 opens upward and is arranged at the upper end of the support leg 120, and the second semicircular ring 140 opens downward and is hinged to one end of the first semicircular ring 130.

[0050] When placing the cable protection tube 1000, the staff rotates the second semicircular ring 140 around the hinge point so that the two second semicircular rings 140 are opened, and then the cable protection tube 1000 is placed on the two first semicircular rings 130, so that the end faces to be welded of the two cable protection tubes 1000 are in contact with the side of the fan-shaped heating block 310, and finally the second semicircular ring 140 is rotated in the opposite direction around the hinge point so that the second semicircular ring 140 and the first semicircular ring 130 are connected to form a ring, thereby completing the coaxial positioning of the two cable protection tubes 1000.

[0051] In a further embodiment, Figure 4 and Fig. 9As shown, the axial movement assembly 200 includes a first axial movement semicircular ring 210 and a second axial movement semicircular ring 220. The first axial movement semicircular ring 210 corresponds to the position of the first semicircular ring 130, and the second axial movement semicircular ring 220 corresponds to the position of the second semicircular ring 140. The inner circumferences of the first axial movement semicircular ring 210 and the second axial movement semicircular ring 220 are both embedded with rubber pads, and the circumferences of the first semicircular ring 130 and the second semicircular ring 140 are both provided with connecting rods 230. The circumferences of the first axial movement semicircular ring 210 and the second axial movement semicircular ring 220 are both correspondingly opened with first connecting holes 240, and the first connecting hole 240 is provided with a first spring. The connecting rod 230 passes through the first connecting hole 240 and is fixedly connected to the first spring.

[0052] The connecting rod 230 and the first connecting hole 240 are provided so that the second axially movable semicircular ring 220 and the second semicircular ring 140 can rotate synchronously around the hinge point. Rubber pads are embedded in the inner circumferences of the second axially movable semicircular ring 220 and the first axially movable semicircular ring 210 to increase the friction between the outer circumferential wall of the cable protection tube 1000 and the inner circumferential walls of the first axially movable semicircular ring 210 and the second axially movable semicircular ring 220, so that when the second axially movable semicircular ring 220 and the first axially movable semicircular ring 210 move, they can drive the cable protection tube 1000 to move synchronously, so that the two cable protection tubes 1000 can approach or move away from each other.

[0053] In a further embodiment, the radial movement component 400 includes a first positioning semicircular ring 410 and a second positioning semicircular ring 420. The first positioning semicircular ring 410 corresponds to the position of the first semicircular ring 130, and the second positioning semicircular ring 420 corresponds to the position of the second semicircular ring 140. The first positioning semicircular ring 410 and the second positioning semicircular ring 420 are both provided with second connecting holes 430 in the circumferential direction. The end of the connecting rod 230 that passes through the first connecting hole 240 is slidably connected in the second connecting hole 430. The first positioning semicircular ring 410 and the second positioning semicircular ring 420 are provided with a semi-annular platform 440 at one end away from the second connecting hole 430. The semi-annular platform 440 is provided with straight guide grooves 441 at equal intervals in the circumferential direction. The straight guide grooves 441 extend radially along the semi-annular platform 440. The radial movement component 400 also includes a guide block 450. The guide block 450 is arranged on the fan-shaped surface of the fan-shaped heating block 310, and the guide block 450 is slidably connected in the straight guide groove 441.

[0054] A second connecting hole 430 is provided, and one end of the connecting rod 230 passing through the first connecting hole 240 is slidably connected in the second connecting hole 430, so that the second positioning semicircular ring 420, the second axially movable semicircular ring 220 and the second semicircular ring 140 can synchronously rotate around the hinge point of the first semicircular ring 130 and the second semicircular ring 140. The straight guide groove 441 and the guide block 450 are provided to guide the movement of the fan-shaped heating block 310 along the radial direction of the cable protection tube 1000.

[0055] When it is necessary to make several fan-shaped heating blocks 310 synchronously approach the axis of the cable protection tube 1000, the staff can push several guide blocks 450 to slide along the corresponding straight guide groove 441 toward the position of the axis of the cable protection tube 1000, so that the guide blocks 450 drive the fan-shaped heating blocks 310 close to the axis of the cable protection tube 1000. Conversely, when it is necessary to make several fan-shaped heating blocks 310 synchronously move away from the axis of the cable protection tube 1000, the staff can make several guide blocks 450 slide along the corresponding straight guide groove 441 toward the position away from the axis of the cable protection tube 1000, so that the guide blocks 450 drive the fan-shaped heating blocks 310 away from the axis of the cable protection tube 1000.

[0056] In a further embodiment, Figure 7 and Figure 8 As shown, a cable protection tube butt welding device also includes a first semi-cylinder 510 and a second semi-cylinder 520, the first semi-cylinder 510 and the first semi-circular ring 130 are located in a corresponding position, and the second semi-cylinder 520 and the second semi-circular ring 140 are located in a corresponding position, and the inner circumferential wall of the first semi-cylinder 510 and the inner circumferential wall of the second semi-cylinder 520 are both provided with a semi-ring plate 530, and the side of the semi-ring plate 530 is provided with an oblique guide groove 531, and the oblique guide groove 531 is inclined to the semi-ring plate 530. Radially, an outer limit ring groove 532 is provided on the outer side of the semi-ring plate 530, and the outer limit ring groove 532 is connected to one end of the inclined guide groove 531. An inner limit ring groove 533 is provided on the inner side of the semi-ring plate 530, and the inner limit ring groove 533 is connected to the other end of the inclined guide groove 531. A guide column 451 is provided on the side of the guide block 450 away from the fan-shaped heating block 310, and the guide column 451 is slidably connected in the inclined guide groove 531, the outer limit ring groove 532 and the inner limit ring groove 533.

[0057] When it is necessary to make several guide blocks 450 slide along the corresponding straight guide grooves 441, the staff can rotate the first semi-cylinder 510 and the second semi-cylinder 520. At this time, under the guidance of the inclined guide grooves 531 and the guide columns 451 and the straight guide grooves 441 and the guide blocks 450, the guide blocks 450 move along the straight guide grooves 441. At this time, the guide blocks 450 drive the fan-shaped heating blocks 310 to move synchronously so that the fan-shaped heating blocks 310 can be close to or away from the axis of the cable protection tube 1000.

[0058] It should be noted that the inner limiting ring groove 533 and the outer limiting ring groove 532 are provided to limit the movement of the guide column 451 .

[0059] In a further embodiment, Figure 4 , Figure 5 and Figure 8 As shown, guide protrusions 540 are provided on the end walls of the first semi-cylinder 510 and the second semi-cylinder 520, and guide grooves 460 are correspondingly opened on the outer peripheral walls of the first positioning semi-circular ring 410 and the second positioning semi-circular ring 420. The guide protrusions 540 are slidably connected in the guide grooves 460, and the guide grooves 460 include a first spiral groove portion 461, a second spiral groove portion 462 and an arc groove portion 463. The arc groove portion 463 is located between the first spiral groove portion 461 and the second spiral groove portion 462 and are connected in sequence. The pitch of the first spiral groove portion 461 is greater than the pitch of the second spiral groove portion 462.

[0060] The cooperation between the guide protrusion 540 and the guide groove 460 is to drive the two first axially movable semi-circular rings 210 and the two second axially movable semi-circular rings 220 to move closer to or away from each other through the rotation of the first semi-cylinder 510 and the second semi-cylinder 520.

[0061] When the device is in use, the staff first rotates the two second semicircular rings 140 around the hinge point, so that the two second semicircular rings 140 are away from the first semicircular ring 130 on the corresponding side. At this time, the second semicircular ring 140 drives the second axial movable semicircular ring 220 and the second positioning semicircular ring 420 to rotate synchronously through the connecting rod 230. At this time, under the cooperation of the inclined guide groove 531 and the guide column 451, and the guide block 450 and the straight guide groove 441, the two second semi-cylinders 520 and the second positioning semicircular ring 420 rotate synchronously. After the two second semicircular rings 140 are opened, the staff puts the cable protection tube 1000 on the two first semicircular rings 130. In the initial state, the fan-shaped heating block 310 should be in a semi-extended state, such as Fig.11In the state shown, the staff manually pushes the two cable protection tubes 1000 so that the end faces to be welded of the two cable protection tubes 1000 abut against the side faces of the fan-shaped heating block 310. This is to facilitate the positioning of the cable protection tubes 1000. The staff then rotates the second semi-circular ring 140 in the opposite direction so that the two second semi-circular rings 140 are closed. Next, the fan-shaped heating block 310 continues to be in a heating state. The staff then rotates the second semi-cylinder 520. Since the second semi-cylinder 520 is in contact with the first semi-cylinder 510, rotating the second semi-cylinder 520 can make the first semi-cylinder 510 rotate synchronously with the second semi-cylinder 520. At this time, under the rotation of the second semi-cylinder 520 and the first semi-cylinder 510 , through the cooperation of the guide protrusion 540 and the guide groove 460, the guide protrusion 540 gradually slides from the arc groove portion 463 to the second spiral groove portion 462, so that the two second axially movable semi-circular rings 220 and the two first axially movable semi-circular rings 210 are close to each other, and the two second axially movable semi-circular rings 220 and the two first axially movable semi-circular rings 210 drive the two cable protection tubes 1000 to approach each other synchronously through the rubber pads, so as to further increase the abutment pressure between the end face to be welded of the cable protection tube 1000 and the side surface of the fan-shaped heating block 310, and increase the length of the melting section of the cable protection tube 1000. At the same time, the rotation of the first semi-cylinder 510 and the second semi-cylinder 520 is also controlled by the inclined guide groove 531 and the guide groove 532. The guiding cooperation with the column 451 makes the guide block 450 approach the axis of the cable protection tube 1000 along the straight guide groove 441. At this time, the guide block 450 drives the fan-shaped heating block 310 to synchronously approach the axis of the cable protection tube 1000. When the multiple fan-shaped heating blocks 310 arranged circumferentially are abutted, the first semi-cylinder 510 and the second semi-cylinder 520 continue to rotate a certain angle, so that the guide column 451 slides from the inclined guide groove 531 to the inner limit ring groove 533, and the guide column 451 continues to slide a certain distance along the inner limit ring groove 533, and then the first semi-cylinder 510 and the second semi-cylinder 520 stop rotating, and then the fan-shaped heating block 310 continues to be in a heating state for a certain period of time. After the heating of the fan-shaped heating block 310 is completed , the staff rotates the first semi-cylinder 510 and the second semi-cylinder 520 in the opposite direction. At this time, under the guidance of the guide groove 460 and the guide protrusion 540, the two first axially movable semi-circular rings 210 and the two second axially movable semi-circular rings 220 drive the two cable protection tubes 1000 to move away from each other through the rubber pads. At the same time, the guide column 451 first slides from the inner limit ring groove 533 into the inclined guide groove 531, and then moves along the inclined guide groove 531 in the direction away from the axis of the cable protection tube 1000. Therefore, after the two cable protection tubes 1000 move away from each other by a certain distance, the fan-shaped heating block 310 moves in the direction away from the axis of the cable protection tube 1000. After the guide protrusion 540 moves from the second spiral groove portion 462 to the inside of the arc groove portion 463,As the first semi-cylinder 510 and the second semi-cylinder 520 continue to rotate, the guide protrusion 540 gradually moves from the arc groove portion 463 to the first spiral groove portion 461. At this time, the distance between the two cable protection tubes 1000 begins to gradually decrease. Since the distance between the first spiral groove portion 461 is greater than the distance between the second spiral groove portion 462, when the first semi-cylinder 510 and the second semi-cylinder 520 rotate at the same angle, the distance between the two first axially movable semi-circular rings 210 and the two second axially movable semi-circular rings 220 is greater, so that the welding end faces of the two cable protection tubes 1000 can be butt-joined together with a certain pressure to complete the welding.

[0062] It can be understood that when the first semi-cylinder 510 and the second semi-cylinder 520 rotate in opposite directions, the guide column 451 moves from the inclined guide groove 531 to the outer limit ring groove 532 and continues to rotate along the outer limit ring groove 532, while the fan-shaped heating block 310 does not move along the radial direction of the cable protection tube 1000.

[0063] It can be understood that when using the present device to weld the cable protection tube 1000, the staff only needs to rotate the first semi-cylinder 510 and the second semi-cylinder 520 to continue, so the welding operation is simpler and more convenient, and the axial moving component 200 can accurately control the moving distance of the cable protection tube 1000, and the radial moving component 400 can accurately control the moving distance of the fan-shaped heating block 310, so the welding accuracy is higher.

[0064] It can be understood that during the welding process of the cable protection tube 1000, the first semi-cylinder 510 and the second semi-cylinder 520 isolate the welding position area of ​​the cable protection tube 1000 from the external environment, which can reduce the impact of the external environment on the welding quality and improve the welding quality.

[0065] In a further embodiment, Fig. 9 As shown, the diameters of the first semi-cylinder 510 and the second semi-cylinder 520 are configured so that when the contact surfaces of the first semi-cylinder 510 and the second semi-cylinder 520 are horizontal, the second semi-cylinder 520 can follow the second semi-circular ring 140 and synchronously move away from the first semi-cylinder 510 around the hinge point. Specifically, an extension plate is provided on one side of the hinge of the first semi-circular ring 130 and the second semi-circular ring 140, so that the hinge point of the first semi-circular ring 130 and the second semi-circular ring 140 is moved outward to the circumference of the diameter of the first semi-cylinder 510 and the second semi-cylinder 520.

[0066] This arrangement is to ensure that when the second semi-circular ring 140 moves away from the first semi-circular ring 130 around the hinge point, the first semi-cylinder 510 and the second semi-cylinder 520 can move away from each other synchronously.

[0067] In a further embodiment, a handle may be provided on the outer circumferential wall of the first semi-cylinder 510 and the second semi-cylinder 520 . The handle is provided to facilitate the staff to manually rotate the first semi-cylinder 510 and the second semi-cylinder 520 .

[0068] In other embodiments, a gear ring may be provided on the outer periphery of the first semi-cylinder 510, and a motor may be provided on the base 110, so that the output shaft of the motor is fixedly connected with a gear, and the gear is meshed with the gear ring, so that the first semi-cylinder 510 is driven to rotate by the motor, and the first semi-cylinder 510 drives the second semi-cylinder 520 to rotate synchronously.

[0069] In a further embodiment, Figure 1 As shown, the non-hinged ends of the first semicircular ring 130 and the second semicircular ring 140 are provided with a snap mechanism 600 .

[0070] The buckle mechanism 600 is provided to connect and fix the non-hinged ends of the first semicircular ring 130 and the second semicircular ring 140 to prevent the cable protection tube 1000 from shaking up and down.

[0071] In a further embodiment, Figure 3 As shown, the snap mechanism 600 includes an insertion rod 610 and a limiting plate 620. The insertion rod 610 is hinged at the end of the first semicircular ring 130. The limiting plate 620 is arranged at one end of the insertion rod 610 away from the first semicircular ring 130. A insertion slot 630 is opened at the end of the second semicircular ring 140. The diameter of the insertion rod 610 is adapted to the width of the insertion slot 630. The width of the limiting plate 620 is greater than the width of the insertion slot 630.

[0072] When placing the cable protection tube 1000, the staff can pull the limit plate 620 to make the insertion rod 610 slide out of the insertion slot 630 around its hinge point, and then the first semicircular ring 130 and the second semicircular ring 140 can be moved away from each other. After the cable protection tube 1000 is placed, the staff rotates the second semicircular ring 140 in the opposite direction to make the first semicircular ring 130 and the second semicircular ring 140 contact each other, and then pulls the limit plate 620 to make the insertion rod 610 inserted into the insertion slot 630 again.

[0073] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0074] The above-described embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A cable protection tube butt welding device, characterized in that: include: There are two positioning brackets, which are used to coaxially position the two cable protection tubes; Axial moving components, there are two axial moving components, the two axial moving components are respectively arranged at the ends of the positioning bracket, and the axial moving components are used to drive the two cable protection tubes to move closer to each other or away from each other along their axes; A heating assembly is located between the two axially movable assemblies. The heating assembly includes a plurality of fan-shaped heating blocks. A sinking groove is provided on one side of the fan-shaped surface of the fan-shaped heating block. A boss is provided on the other side of the fan-shaped surface of the fan-shaped heating block. The sinking groove and the boss are adapted to each other. A sinking boss is provided on one side of the two rectangular surfaces of the fan-shaped heating block close to the sinking groove. The plurality of fan-shaped heating blocks are evenly distributed around the axis of the cable protection tube and two adjacent fan-shaped heating blocks are arranged in opposite directions. The radial moving component is located outside the heating component. The radial moving component is used to drive several fan-shaped heating blocks to synchronously approach the axis of the cable protection tube so that several fan-shaped heating blocks are connected into a circumferentially closed ring structure. The radial moving component is also used to drive several fan-shaped heating blocks to synchronously move away from the axis of the cable protection tube.

2. A cable protection tube butt welding device according to claim 1, characterized in that: The positioning bracket includes a base, a support leg, a first semicircular ring and a second semicircular ring. The support leg is arranged on the upper surface of the base, the first semicircular ring opens upward and is arranged on the upper end of the support leg, and the second semicircular ring opens downward and is hinged to one end of the first semicircular ring.

3. A cable protection tube butt welding device according to claim 1, characterized in that: The axial movement assembly includes a first axial movement semicircular ring and a second axial movement semicircular ring. The first axial movement semicircular ring corresponds to the position of the first semicircular ring, and the second axial movement semicircular ring corresponds to the position of the second semicircular ring. The inner circumferences of the first axial movement semicircular ring and the second axial movement semicircular ring are both embedded with rubber pads, and the circumferences of the first and second axial movement semicircular rings are both provided with connecting rods. The circumferences of the first and second axial movement semicircular rings are both correspondingly provided with first connecting holes, and a first spring is provided in the first connecting hole. The connecting rod passes through the first connecting hole and is fixedly connected to the first spring.

4. A cable protection tube butt welding device according to claim 3, characterized in that: The radial movement assembly includes a first positioning semicircular ring and a second positioning semicircular ring, the first positioning semicircular ring corresponds to the position of the first semicircular ring, the second positioning semicircular ring corresponds to the position of the second semicircular ring, and the first positioning semicircular ring and the second positioning semicircular ring are both provided with second connecting holes in the circumference, and one end of the connecting rod passing through the first connecting hole is slidably connected to the second connecting hole; The first positioning semicircular ring and the second positioning semicircular ring are provided with a semi-ring platform at one end away from the second connecting hole, and straight guide grooves are provided at equal intervals in the circumferential direction of the semi-ring platform, and the straight guide grooves extend along the radial direction of the semi-ring platform; The radial moving assembly also includes a guide block, which is arranged on the sector surface of the sector heating block and is slidably connected in the straight guide groove.

5. A cable protection tube butt welding device according to claim 4, characterized in that: It also includes a first semi-cylinder and a second semi-cylinder, the first semi-cylinder and the first semi-circular ring are in corresponding positions, the second semi-cylinder and the second semi-circular ring are in corresponding positions, the inner circumferential wall of the first semi-cylinder and the inner circumferential wall of the second semi-cylinder are both provided with a semi-ring plate, the side of the semi-ring plate is provided with an oblique guide groove, the oblique guide groove is inclined to the radial direction of the semi-ring plate, the outer side of the semi-ring plate is provided with an outer limit ring groove, the outer limit ring groove is connected to one end of the oblique guide groove, the inner side of the semi-ring plate is provided with an inner limit ring groove, the inner limit ring groove is connected to the other end of the oblique guide groove; A guide column is arranged on one side of the guide block away from the fan-shaped heating block, and the guide column is slidably connected in the oblique guide groove, the outer limit ring groove and the inner limit ring groove.

6. A cable protection tube butt welding device according to claim 5, characterized in that: Guide protrusions are provided on the end walls of the first semi-cylinder and the second semi-cylinder, and guide grooves are correspondingly opened on the outer peripheral walls of the first axially movable semi-circular ring and the second axially movable semi-circular ring. The guide protrusions are slidably connected in the guide grooves, and the guide grooves include a first spiral groove portion, a second spiral groove portion and an arc groove portion. The arc groove portion is located between the first spiral groove portion and the second spiral groove portion and is connected in sequence, and the pitch of the first spiral groove portion is greater than the pitch of the second spiral groove portion.

7. A cable protection tube butt welding device according to claim 6, characterized in that: The diameters of the first semi-cylinder and the second semi-cylinder are configured so that when the contact surfaces of the first semi-cylinder and the second semi-cylinder are horizontal, the second semi-cylinder can follow the second semi-circle around the hinge point and synchronously move away from the first semi-cylinder.

8. A cable protection tube butt welding device according to claim 2, characterized in that: The non-hinged ends of the first semicircular ring and the second semicircular ring are provided with snap-fit ​​mechanisms.

9. A cable protection tube butt welding device according to claim 8, characterized in that: The buckle mechanism includes an insertion rod and a limit plate. The insertion rod is hinged at the end of the first semicircular ring. The limit plate is arranged at the end of the insertion rod away from the first semicircular ring. A insertion slot is opened at the end of the second semicircular ring. The diameter of the insertion rod is adapted to the width of the insertion slot, and the width of the limit plate is greater than the width of the insertion slot.

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