A connecting joint for repairing a mineral insulated heating cable and a mating tool

Abstract

The present application relates to the technical field of electric heating element, and particularly relates to a connecting joint for mineral insulation heating cable maintenance and a butt joint tool. The connecting joint comprises a first sleeve, a second sleeve which is slidably connected to the inner wall of the first sleeve, and a sliding sleeve which is slidably penetrated through the interiors of the first sleeve and the second sleeve, and a closed space is formed between the outer wall of the sliding sleeve and the inner walls of the first sleeve and the second sleeve. Through the cooperation of the first sleeve, the second sleeve and the sliding sleeve, the connecting joint can effectively fill the magnesium oxide powder in the mineral insulation heating cable. In the operation process, the sliding sleeve first keeps the magnesium oxide powder in the closed space from falling off. When the sliding sleeve is pulled out, the first sleeve and the second sleeve are pushed to be close to each other, so that the volume of the closed space is effectively reduced, the magnesium oxide powder can be tightly filled between the magnesium oxide insulation materials of the two cable bodies, and the magnesium oxide powder is further compacted by the action of the vibration assembly.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric heating elements, in particular to a connecting joint for repairing mineral insulated heating cable and a butt joint tool. BACKGROUND

[0002] Mineral insulated heating cable has been widely used in industrial heating, building heating and other fields due to its excellent high temperature resistance, fireproof performance and excellent mechanical strength. However, as the service life increases or accidental damage occurs, repairing and joint processing of the mineral insulated heating cable become an important but complex task. Currently, there are mainly two ways for joint processing of the mineral insulated heating cable, but each of them has obvious technical challenges and limitations.

[0003] The first method involves welding the heating wire at the connection site using oxygen welding technology, and packaging the welding point in a metal sleeve made of stainless steel material. Although this method provides a certain degree of safety and reliability, due to its structural characteristics, this joint is only suitable for environments with an operating temperature not exceeding 150℃. For applications that need to work at higher temperatures, this joint solution is obviously not suitable, thereby limiting its possibility of wide application.

[0004] The second common joint processing method uses magnesium oxide powder filling technology, which is completed by screwing the two ends and finally using argon arc welding. First of all, the joint must be accurately installed at the end of the cable, and then magnesium oxide powder is filled inside the joint. In this process, in order to ensure that the magnesium oxide powder can tightly wrap the conductor, manual knocking of the joint is usually required to help the magnesium oxide powder to settle and naturally compact. However, this process not only consumes time and effort, but also the filling method can cause the magnesium oxide powder to be not solid enough, and voids can easily form inside. These voids can cause air to expand during subsequent welding, causing the phenomenon of air drumming. Meanwhile, the magnesium oxide powder that is not fully compacted may be ejected during welding, causing safety hazards. SUMMARY

[0005] Therefore, the present application provides a connecting joint for repairing mineral insulated heating cable and a butt joint tool, which can overcome the shortcomings of the prior art that the magnesium oxide powder filling joint needs to be manually filled with magnesium oxide powder and the joint needs to be knocked to make the magnesium oxide powder settle and compact naturally, which not only consumes time and effort, but also the filling method can cause the magnesium oxide powder to be not solid enough, thereby affecting the subsequent welding work.

[0006] The technical solution is: a connection joint for repairing mineral insulated heating cables, comprising: a first shell; a second shell, slidably connected to the inner wall of the first shell; a sliding sleeve, sliding through the interior of the first shell and the second shell, and a closed space is formed between the outer wall of the sliding sleeve and the inner wall of the first shell and the second shell, and magnesium oxide powder is filled in the closed space. When the first shell and the second shell are respectively sleeved on the outside of the stainless steel sheaths of the two cable bodies, the sliding sleeve is slid out, and then the first shell and the second shell are pushed toward each other to reduce the volume of the closed space, so that the magnesium oxide powder in the closed space is filled between the magnesium oxide insulation materials of the two cable bodies, and the first shell and the second shell can compact the magnesium oxide powder; a limiting ring, connected to the end of the sliding sleeve, is used to limit the sliding sleeve.

[0007] The present invention also provides a docking tool for connecting joints for repairing mineral insulated heating cables, which also includes: a mounting plate; a guide rail connected to the top of the mounting plate; a sliding seat symmetrically slidably connected to the guide rail; a fixed shell connected to the upper end of the sliding seat; a rotating shell rotatably connected to the side of the sliding seat, and the rotating shell is in contact with the fixed shell; an arc-shaped plug plate, respectively connected to the inner wall of the fixed shell and the rotating shell; a clamping block connected to the top of the fixed shell; an elastic clamping rod connected to the top of the rotating shell, and the end of the elastic clamping rod can be clamped on the clamping block; a moving component, arranged at the top of the mounting plate, used to drive the sliding seat to move; and a vibration component, arranged at the bottom of the mounting plate, used to drive the mounting plate to vibrate.

[0008] As an improvement of the above scheme, the moving component includes: a drive motor, installed on the top of the mounting plate; a bidirectional screw rod, rotatably connected to the guide rail, and the end of the bidirectional screw rod is connected to the output shaft of the drive motor, and the two sliding seats are both threadedly connected to the bidirectional screw rod.

[0009] As an improvement of the above solution, the vibration component includes: a base plate, arranged below the mounting plate; a connecting spring, with both ends respectively connected to the top of the base plate and the bottom of the mounting plate; and a vibration motor, symmetrically installed on the top of the mounting plate.

[0010] As an improvement to the above solution, it also includes: a sliding iron block, symmetrically slidably connected to the base plate; a U-shaped clamping plate, connected to the top of the sliding iron block, and the U-shaped clamping plate is used to lock the mounting plate; a first magnet, symmetrically connected to the base plate, and the first magnet attracts the sliding iron block through magnetic force; a second magnet, symmetrically connected to the base plate, and the sliding iron block is located between the first magnet and the second magnet.

[0011] As the improvement of the above scheme, further comprising: support rod, symmetrically connected to the top of the mounting plate; baffle, connected to the top of the support rod, and the baffle is blocked above the bidirectional screw rod, the baffle is symmetrically opened in a slot, and the sliding seat slides in the slot; T-shaped sliding sleeve, slidingly connected to the sliding seat; tapered blocks, uniformly spaced and connected to the bottom of the T-shaped sliding sleeve; cloth, placed on the top of the baffle, and the cloth covers above the slot, and the bottom of the tapered block is in contact with the top of the cloth.

[0012] As the improvement of the above scheme, further comprising: fixed clamping plate; rotating clamping plate, rotatably connected to the fixed clamping plate, and the rotating clamping plate can clamp the heat generating body of the cable body in cooperation with the fixed clamping plate; the rotating clamping plate is provided with a square hole; spring piece, both ends of the spring piece are respectively connected to the side surface of the fixed clamping plate and the rotating clamping plate; screw rod, rotatably connected to the top of the fixed clamping plate, and the screw rod passes through the square hole; screw sleeve, slidingly connected in the square hole, and the screw sleeve is threadedly connected with the screw rod.

[0013] As the improvement of the above scheme, further comprising: connecting ring, the connecting ring is used for sleeving outside the stainless steel sheath of the cable body; connecting rod, circumferentially and intervally connected to the outer wall of the connecting ring, and the end of the connecting rod is welded on the first sleeve shell or the second sleeve shell.

[0014] The present application has the following advantages: 1, the present application can realize effective filling of magnesium oxide powder in the joint of mineral insulation heating cable by cooperation of the first sleeve shell, the second sleeve shell and the sliding sleeve, in the operation process, the sliding sleeve first keeps the magnesium oxide powder in the closed space from falling, when the sliding sleeve is pulled out, the first sleeve shell and the second sleeve shell are pushed to be close to each other, which can effectively reduce the volume of the closed space, so that the magnesium oxide powder can be tightly filled between the magnesium oxide insulation materials of the two cable bodies, and further compacted by the action of the vibration assembly, the whole operation process is relatively simple, and the problems of uneven filling and internal gap caused by traditional manual knocking can be avoided.

[0015] 2, the present application can clamp and fix the heat generating body of the two cable bodies by cooperation of the fixed clamping plate and the rotating clamping plate, so as to ensure the accurate alignment of the end portions of the two heat generating bodies, and at the same time, the installation plate can be locked in the welding process of the first sleeve shell and the second sleeve shell by cooperation of the sliding iron block, the U-shaped clamping plate, the first magnet and the second magnet, so as to ensure the stability of the first sleeve shell and the second sleeve shell and the welding quality.

[0016] 3, the present application can strengthen the connection strength between the stainless steel sheath of the cable body and the first sleeve shell or the second sleeve shell by the design of the connecting ring and the connecting rod, so as to prevent damage caused by mechanical stress, at the same time, the slot on the baffle and the cloth covering above the slot can effectively block the welding slag from entering the key components, such as the bidirectional screw rod, during the welding process, so as to protect the equipment from being polluted by the welding slag, prolong the service life of the equipment, and ensure the smooth operation of the subsequent operation. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structure diagram of the first shell, the second shell, the sliding sleeve and the limiting ring.

[0018] Figure 2 It is a sectional view of the first shell, the second shell, the sliding sleeve and the limiting ring.

[0019] Figure 3 It is an installation diagram of the installation plate, the guide rail, the sliding seat, the fixed shell and the rotating shell.

[0020] Figure 4 It is a three-dimensional structure diagram when the rotating shell is opened.

[0021] Figure 5 It is a three-dimensional structure diagram when the rotating shell is closed.

[0022] Figure 6 It is an installation diagram of the vibration assembly.

[0023] Figure 7 It is an installation diagram of the sliding iron block, the U-shaped clamping plate, the first magnet and the second magnet.

[0024] Figure 8 It is an installation diagram of the supporting rod, the baffle, the T-shaped sliding sleeve and the blocking cloth.

[0025] Figure 9 It is a separation structure diagram of the baffle, the T-shaped sliding sleeve and the blocking cloth.

[0026] Figure 10 It is an installation diagram of the fixed clamping plate, the rotating clamping plate, the elastic sheet, the screw rod and the screw sleeve.

[0027] Figure 11 It is a separation structure diagram of the fixed clamping plate and the rotating clamping plate.

[0028] Figure 12 It is an installation diagram of the connecting ring and the connecting rod.

[0029] The label names in the figure: 1, cable body, 101, stainless steel sheath, 102, magnesium oxide insulation material, 103, heating body, 2, first shell, 3, second shell, 4, sliding sleeve, 5, limiting ring, 6, mounting plate, 7, guide rail, 8, sliding seat, 9, fixed shell, 10, rotating shell, 11, arc-shaped plugboard, 12, clamping block, 13, elastic clamping rod, 14, driving motor, 15, bidirectional screw rod, 16, bottom plate, 17, connecting spring, 18, vibration motor, 19, sliding iron block, 20, U-shaped clamping plate, 21, first magnet, 22, second magnet, 23, support rod, 24, baffle, 2401, slot, 25, T-shaped sliding sleeve, 2501, conical block, 26, cloth stopper, 27, fixed clamping plate, 2801, square hole, 28, rotating clamping plate, 29, elastic sheet, 30, screw rod, 31, screw sleeve, 32, connecting ring, 33, connecting rod. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0031] Embodiment: A connecting joint and butt joint tool for repairing mineral insulated heating cable, such as Figure 1 and Figure 2As shown, it includes a first shell 2, a second shell 3, a sliding sleeve 4 and a limiting ring 5. The first shell 2 is slidably connected to the second shell 3 on the right side. The left and right ends of the first shell 2 and the second shell 3 are both open-type designs. The first shell 2 and the second shell 3 are both made of stainless steel. The sliding sleeve 4 slides through the inside of the first shell 2 and the second shell 3, and a closed space is formed between the outer wall of the sliding sleeve 4 and the inner wall of the first shell 2 and the second shell 3. The closed space is filled with magnesium oxide powder. When the sliding sleeve 4 is sleeved on the outside of the stainless steel sheath 101 of the two cable bodies 1, the sliding sleeve 4 can be moved to the right and pulled out, so that the first shell 2 and the second shell 3 are respectively sleeved on the two cable bodies 1 When the outside of the stainless steel sheath 101 is formed, the first shell 2 and the second shell 3 are pushed toward each other, which can reduce the volume of the enclosed space so that the magnesium oxide powder in the enclosed space can be automatically filled between the magnesium oxide insulating materials 102 of the two cable bodies 1, and the first shell 2 and the second shell 3 can compact the magnesium oxide powder. The right end of the sliding sleeve 4 is connected to a limiting ring 5, which is used to limit the sliding sleeve 4. Under the action of the limiting ring 5, the sliding sleeve 4 can be prevented from moving to the left and separating from the first shell 2 and the second shell 3. The first shell 2, the second shell 3, the sliding sleeve 4 and the limiting ring 5 need to be sealed and packaged to prevent the magnesium oxide powder in the enclosed space from getting damp.

[0032] like Figures 3-6 As shown, it also includes a mounting plate 6, a guide rail 7, a sliding seat 8, a fixed shell 9, a rotating shell 10, an arc plug plate 11, a block 12, an elastic clamping rod 13, a moving component and a vibration component. The guide rail 7 is connected to the middle of the top of the mounting plate 6, and the sliding seat 8 is symmetrically slidably connected to the guide rail 7. The tops of the two sliding seats 8 are connected to the fixed shell 9, and the upper front parts of the two sliding seats 8 are rotatably connected to the rotating shell 10. The rotating shell 10 corresponds to the fixed shell 9 one by one and contacts each other. The inner walls of the two fixed shells 9 and the two rotating shells 10 are connected with arc plug plates 11. The thickness of the arc plug plates 11 is adapted to the thickness of the sliding sleeve 4. The tops of the two fixed shells 9 are connected with blocks 12, and the tops of the two rotating shells 10 are connected with elastic clamping rods 13, and the rear ends of the elastic clamping rods 13 can be stuck on the block 12 to limit the rotating shell 10. The moving component is used to drive the sliding seat 8 to move, and the vibration component is used to drive the mounting plate 6 to vibrate.

[0033] like Figure 3 As shown, the moving assembly includes a drive motor 14 and a bidirectional screw rod 15. The drive motor 14 is installed on the left side of the top of the mounting plate 6. The upper part of the guide rail 7 is rotatably connected to the bidirectional screw rod 15. The left end of the bidirectional screw rod 15 is connected to the output shaft of the drive motor 14. The lower parts of the two sliding seats 8 are both threadedly connected to the bidirectional screw rod 15.

[0034] like Figure 6As shown, the vibration assembly includes a bottom plate 16, connecting springs 17 and vibration motors 18, the bottom plate 16 is arranged directly below the mounting plate 6, a plurality of connecting springs 17 are uniformly and spacedly connected between the top of the bottom plate 16 and the bottom of the mounting plate 6, and the vibration motors 18 are symmetrically installed on the left and right of the top rear side of the mounting plate 6.

[0035] At the beginning, the rotating shell 10 is in the open state; when the two cable bodies 1 need to be connected, first, the stainless steel sheath 101 and the magnesium oxide insulation material 102 at the end of the two cable bodies 1 are stripped to expose the heating body 103 at the end of the two cable bodies 1, then the first shell 2, the second shell 3, the sliding sleeve 4 and the limiting ring 5 are taken out from the packaging bag of the sealed package, the sliding sleeve 4 is sleeved outside the stainless steel sheath 101 of the left cable body 1, then the heating bodies 103 at the ends of the two cable bodies 1 can be aligned and welded to connect the heating bodies 103 at the ends of the two cable bodies 1 together, then the first shell 2, the second shell 3, the sliding sleeve 4 and the limiting ring 5 are moved to the right, so that the connection part of the heating bodies 103 at the ends of the two cable bodies 1 is located in the sliding sleeve 4, then the limiting ring 5 is moved to the right, so that the sliding sleeve 4 can be pulled out from the inside of the first shell 2 and the second shell 3, the first shell 2 and the second shell 3 are sleeved outside the stainless steel sheath 101 of the two cable bodies 1 respectively, and the magnesium oxide powder in the closed space will fall outside the stainless steel sheath 101 of the two cable bodies 1, at this time, a small gap will be left between the stainless steel sheath 101 and the first shell 2 and the second shell 3, then the stainless steel sheaths 101 of the two cable bodies 1 can be moved into the two fixed shells 9 respectively, then the rotating shell 10 is turned up to close, the rotating shell 10 can drive the elastic clamping rod 13 to turn up, when the elastic clamping rod 13 contacts the clamping block 12, under the elastic force of the elastic clamping rod 13 itself, the rear end of the elastic clamping rod 13 can be clamped on the clamping block 12, so as to limit the rotating shell 10, at this time, the rotating shell 10 and the fixed shell 9 contact each other and are sleeved outside the stainless steel sheath 101 of the cable body 1, and the arc-shaped insertion plates 11 on the rotating shell 10 and the fixed shell 9 also contact each other, then the driving motor 14 is started, the driving motor 14 drives the bidirectional screw 15 to rotate, the bidirectional screw 15 drives the left and right sliding seats 8 to move to the side close to each other, the sliding seats 8 drive the left and right fixed shells 9, the rotating shell 10 and the arc-shaped insertion plates 11 to move to the side close to each other, so that the arc-shaped insertion plates 11 are inserted in the gap between the stainless steel sheath 101 and the first shell 2 and the second shell 3, preventing the magnesium oxide powder from leaking out of the above-mentioned gap, when the inner walls of the fixed shell 9 and the rotating shell 10 contact the outer walls of the first shell 2 and the second shell 3, the fixed shell 9 and the rotating shell 10 push the first shell 2 and the second shell 3 to move to the side close to each other, so as to reduce the volume of the closed space, so that the magnesium oxide powder in the closed space can automatically fill between the magnesium oxide insulation materials 102 of the two cable bodies 1, at the same time, the vibration motor 18 can be started, the vibration motor 18 drives the mounting plate 6 to vibrate at high frequency, the connecting spring 17 will adaptively deform to reduce the vibration transmitted to the bottom plate 16, the mounting plate 6 drives the first shell 2 and the second shell 3 to vibrate at high frequency, so that the magnesium oxide powder can be tightly filled between the magnesium oxide insulation materials 102 of the two cable bodies 1,And the first shell 2 and the second shell 3 can be compacted with the magnesium oxide powder inside, then the vibration motor 18 and the drive motor 14 are closed, and the welding between the right end of the first shell 2 and the outer wall of the second shell 3 is performed, so that the first shell 2 and the second shell 3 are connected as a whole, preventing the first shell 2 and the second shell 3 from sliding relative to each other and causing the magnesium oxide powder inside to loosen, then the arc-shaped plug plate 11 is moved upwards to be separated from the clamping block 12, and the rotating shell 10 is rotated downwards to be separated from the fixed shell 9, then the stainless steel sheath 101 of the two cable bodies 1 can be taken out from the fixed shell 9, and the welding between the first shell 2 and the left stainless steel sheath 101 and the welding between the second shell 3 and the right stainless steel sheath 101 are performed, so that the first shell 2 and the second shell 3 are fixed on the stainless steel sheaths 101 of the two cable bodies 1, the whole operation process is relatively simple, and the safety in the subsequent welding process is ensured.

[0036] As shown in Figure 7 The sliding iron blocks 19, the U-shaped clamping plates 20, the first magnets 21 and the second magnets 22 are further included, the bottom plate 16 is symmetrically connected with the sliding iron blocks 19 in front and back, the number of the sliding iron blocks 19 is four, the U-shaped clamping plate 20 is connected between the top of the two sliding iron blocks 19 on the front side, the U-shaped clamping plate 20 is also connected between the top of the two sliding iron blocks 19 on the back side, the openings of the two U-shaped clamping plates 20 are both towards the mounting plate 6, and the upper and lower edges of the openings of the two U-shaped clamping plates 20 are both arc-shaped, the first magnets 21 are symmetrically connected with the bottom plate 16 in left and right, the first magnets 21 correspond to the sliding iron blocks 19 one by one, and the first magnets 21 can attract the corresponding sliding iron blocks 19 by magnetic force, the second magnets 22 are symmetrically connected with the second magnets 22 in the middle, the second magnets 22 correspond to the sliding iron blocks 19 one by one, and the sliding iron blocks 19 are located between the first magnets 21 and the second magnets 22.

[0037] When the welding between the right end of the first shell 2 and the outer wall of the second shell 3 is performed, the U-shaped clamping plates 20 on the front and back sides can be moved to the side close to each other, the U-shaped clamping plates 20 can drive the sliding iron blocks 19 on the front and back sides to move to the side close to each other, so that the sliding iron blocks 19 are separated from the first magnets 21, then the U-shaped clamping plates 20 on the front and back sides are clamped on the front and back sides of the mounting plate 6 respectively, and the second magnets 22 can attract the sliding iron blocks 19 by magnetic force, so as to fix the positions of the sliding iron blocks 19 and the U-shaped clamping plates 20, the U-shaped clamping plates 20 can lock the mounting plate 6, preventing the mounting plate 6 from shaking under the action of the connecting spring 17, and ensuring the stability of the first shell 2 and the second shell 3 during the welding process.

[0038] As shown in Figure 8 And Figure 9As shown, it also includes support rods 23, a baffle 24, T-shaped sliding sleeves 25, conical blocks 2501 and a baffle cloth 26, four support rods 23 are symmetrically connected to the top of the mounting plate 6, the top of the four support rods 23 is connected to the baffle 24, and the baffle 24 is blocked above the bidirectional screw rod 15, the baffle 24 is symmetrically provided with a slot 2401, and the two sliding seats 8 are slidably arranged in the two slots 2401, the T-shaped sliding sleeves 25 are slidably connected to the two sliding seats 8, the conical blocks 2501 are connected to the bottom of the two T-shaped sliding sleeves 25 from front to back, the baffle cloth 26 is placed on the top of the baffle 24, and the baffle cloth 26 covers the top of the slot 2401, and the baffle cloth 26 is made of high-temperature resistant material. The bottom of each conical block 2501 is in contact with the top of the baffle cloth 26.

[0039] When the left and right sliding seats 8 move to the side close to each other, the sliding seats 8 can drive the left and right ends of the baffle cloth 26 to move to the side close to each other through the T-shaped sliding sleeves 25 and the conical blocks 2501, and the middle of the baffle cloth 26 will arch upward; when welding between the right end of the first shell 2 and the outer wall of the second shell 3, the baffle 24 can prevent welding slag from falling on the bidirectional screw rod 15, and the baffle cloth 26 can prevent the welding slag from falling on the bidirectional screw rod 15 through the slot 2401 of the baffle 24, ensuring that the sliding seat 8 can move smoothly along the bidirectional screw rod 15. When the left and right sliding seats 8 move to the side away from each other and reset, the sliding seats 8 can drive the left and right ends of the baffle cloth 26 to move to the side away from each other and reset through the T-shaped sliding sleeves 25 and the conical blocks 2501, so that the baffle cloth 26 returns to its original state. When the baffle cloth 26 needs to be replaced, the T-shaped sliding sleeve 25 can be moved upward to drive the conical block 2501 to move upward and separate from the baffle cloth 26, and then the baffle cloth 26 can be replaced.

[0040] As shown in Figure 10 and Figure 11 It also includes a fixed clamp plate 27, a rotating clamp plate 28, a spring 29, a screw rod 30 and a screw sleeve 31, the rotating clamp plate 28 is rotatably connected to the front of the fixed clamp plate 27, and the rotating clamp plate 28 and the fixed clamp plate 27 cooperate to clamp the heating body 103 of the cable body 1, the middle of the rotating clamp plate 28 is provided with a square hole 2801, the left side of the fixed clamp plate 27 and the left side of the rotating clamp plate 28 are connected with the spring 29, the right side of the fixed clamp plate 27 and the right side of the rotating clamp plate 28 are also connected with the spring 29, the screw rod 30 is rotatably connected to the top of the rotating clamp plate 28, and the screw rod 30 passes through the square hole 2801, the screw sleeve 31 is slidably connected in the square hole 2801, the screw sleeve 31 is T-shaped, and the screw sleeve 31 is threadedly connected with the screw rod 30.

[0041] At the beginning, the upper part of the screw sleeve 31 presses the top of the rotating clamp plate 28, and the elastic sheet 29 is in a deformed state; when the heat generating body 103 at the end of the two cable bodies 1 needs to be welded, first rotate the screw rod 30, the screw rod 30 can drive the screw sleeve 31 to move upwards, so that the screw sleeve 31 no longer presses the top of the rotating clamp plate 28, at this time the elastic sheet 29 will restore to its original state, driving the rotating clamp plate 28 to rotate upwards and open, then the heat generating body 103 at the end of the two cable bodies 1 can be placed on the fixed clamp plate 27 by artificial, then reverse the screw rod 30, the screw rod 30 can drive the screw sleeve 31 to move downwards, the screw sleeve 31 will extrude the rotating clamp plate 28 to rotate downwards and close, the elastic sheet 29 is deformed, the fixed clamp plate 27 and the rotating clamp plate 28 can clamp the heat generating body 103 at the end of the two cable bodies 1, ensure that the heat generating body 103 at the end of the two cable bodies 1 is in an aligned state, and also prevent the heat generating body 103 at the end of the cable body 1 from moving, and at the same time ensure the coaxiality of the heat generating body 103 at the end of the two cable bodies 1, facilitating subsequent welding work.

[0042] As shown in Figure 12 It also includes a connecting ring 32 and a connecting rod 33, the connecting ring 32 is used to be sleeved outside the stainless steel sheath 101 of the cable body 1, the outer wall of the connecting ring 32 is circumferentially spaced apart and connected with a plurality of connecting rods 33, and the end of the connecting rod 33 can be welded on the first sleeve shell 2 or the second sleeve shell 3.

[0043] When the heat generating body 103 at the end of the two cable bodies 1 is welded, the two connecting rings 32 can be sleeved outside the stainless steel sheath 101 of the two cable bodies 1 respectively; when the first sleeve shell 2 and the second sleeve shell 3 are welded with the stainless steel sheath 101 of the two cable bodies 1 respectively, the connecting rings 32 on the left and right sides can be moved to the side close to each other, the connecting ring 32 can drive the connecting rods 33 on the left and right sides to move to the side close to each other, so that the connecting rods 33 on the left and right sides are in contact with the outer wall of the first sleeve shell 2 and the second sleeve shell 3 respectively, and then the connecting rods 33 on the left and right sides are welded with the first sleeve shell 2 and the second sleeve shell 3 respectively, so that the bending and breaking of the welded part of the stainless steel sheath 101 of the cable body 1 and the first sleeve shell 2 and the second sleeve shell 3 can be prevented.

[0044] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A butt joint tool for mineral insulated heating cable repair connection joints, the butt joint tool is used for butt joints of mineral insulated heating cable repair connection joints, and is characterized by: The connecting joint comprises a first shell (2); a second shell (3) slidably connected to the inner wall of the first shell (2); a sliding sleeve (4) slidingly penetrating the interior of the first shell (2) and the second shell (3), and a closed space is enclosed between the outer wall of the sliding sleeve (4) and the inner walls of the first shell (2) and the second shell (3), wherein magnesium oxide powder is contained in the closed space. When the first shell (2) and the second shell (3) are respectively sheathed on the outer sides of the stainless steel sheaths (101) of the two cable bodies (1), the sliding sleeve (4) is slid out, and then the first shell (2) and the second shell (3) are pushed toward each other to reduce the volume of the closed space, so that the magnesium oxide powder in the closed space is filled between the magnesium oxide insulating materials (102) of the two cable bodies (1), and the first shell (2) and the second shell (3) can compact the magnesium oxide powder; a limiting ring (5) connected to the end of the sliding sleeve (4) and used for limiting the sliding sleeve (4); The docking tool comprises: a mounting plate (6); a guide rail (7) connected to the top of the mounting plate (6); a sliding seat (8) symmetrically slidably connected to the guide rail (7); a fixed shell (9) connected to the upper end of the sliding seat (8); a rotating shell (10) rotatably connected to the side of the sliding seat (8), and the rotating shell (10) contacts and cooperates with the fixed shell (9); an arc-shaped inserting plate (11) respectively connected to the inner wall of the fixed shell (9) and the rotating shell (10); the thickness of the arc-shaped inserting plate (11) is adapted to the thickness of the sliding sleeve (4); a clamping block (12) connected to the top of the fixed shell (9); an elastic clamping rod (13) connected to the top of the rotating shell (10), and the end of the elastic clamping rod (13) can be clamped on the clamping block (12); a moving component arranged at the top of the mounting plate (6) for driving the sliding seat (8) to move; and a vibration component arranged at the bottom of the mounting plate (6) for driving the mounting plate (6) to vibrate. The moving assembly includes: a driving motor (14), which is mounted on the top of the mounting plate (6); a bidirectional screw rod (15), which is rotatably connected to the guide rail (7), and the end of the bidirectional screw rod (15) is connected to the output shaft of the driving motor (14); and two sliding seats (8) are both threadedly connected to the bidirectional screw rod (15); The vibration assembly includes: a base plate (16) disposed below the mounting plate (6); a connecting spring (17) having two ends respectively connected to the top of the base plate (16) and the bottom of the mounting plate (6); and a vibration motor (18) symmetrically mounted on the top of the mounting plate (6). The docking tool further comprises: a sliding iron block (19) symmetrically slidably connected to the bottom plate (16); a U-shaped clamping plate (20) connected to the top of the sliding iron block (19), the U-shaped clamping plate (20) being used to lock the mounting plate (6); a first magnet (21) symmetrically connected to the bottom plate (16), and the first magnet (21) adsorbs the sliding iron block (19) through magnetic force; a second magnet (22) symmetrically connected to the bottom plate (16), and the sliding iron block (19) is located between the first magnet (21) and the second magnet (22); The docking tool further comprises: a support rod (23) symmetrically connected to the top of the mounting plate (6); a baffle (24) connected to the top of the support rod (23), and the baffle (24) blocks the top of the bidirectional screw rod (15), a straight hole (2401) symmetrically opened on the baffle (24), and the sliding seat (8) slides in the straight hole (2401); a T-shaped sliding sleeve (25) slidably connected to the sliding seat (8); a tapered block (2501) evenly spaced and connected to the bottom of the T-shaped sliding sleeve (25); a blocking cloth (26) placed on the top of the baffle (24), and the blocking cloth (26) covers the top of the straight hole (2401), and the bottom of the tapered block (2501) contacts the top of the blocking cloth (26).

2. A butt joint tool for a mineral insulated heating cable repair connection joint according to claim 1, characterized in that: The utility model further comprises: a fixed clamping plate (27); a rotating clamping plate (28), which is rotatably connected to the fixed clamping plate (27), and the rotating clamping plate (28) cooperates with the fixed clamping plate (27) to clamp the heating element (103) of the cable body (1), and a square hole (2801) is opened on the rotating clamping plate (28); a spring piece (29), the two ends of which are respectively connected to the side of the fixed clamping plate (27) and the rotating clamping plate (28); a screw rod (30), which is rotatably connected to the top of the fixed clamping plate (27), and the screw rod (30) passes through the square hole (2801); a screw sleeve (31), which is slidably connected in the square hole (2801), and the screw sleeve (31) is threadedly connected to the screw rod (30).

3. A butt joint tool for a mineral insulated heating cable repair connection joint according to claim 2, characterized in that: The cable body (1) further comprises: a connecting ring (32) for being sleeved on the outside of the stainless steel sheath (101) of the cable body (1); and connecting rods (33) connected to the outer wall of the connecting ring (32) at circumferential intervals, with the ends of the connecting rods (33) being welded to the first housing (2) or the second housing (3).

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