Conductor welding method and welding frame

Abstract

The invention discloses a submarine cable flexible joint conductor welding method and a welding holder, the cable conductor welding holder comprises a base, the base is provided with a first support arm and a second support arm, the first support arm is provided with a first fixing clamp, and the second support arm is provided with a second fixing clamp; a first wire passing hole and a second wire passing hole are formed in the first fixing clamp and the second fixing clamp respectively, and the axis of the first wire passing hole coincides with that of the second wire passing hole. According to the method, the pressing range can be changed according to the pressing coefficients and specifications of different welding conductors, the whole welding process is digitized to the maximum extent, and the welding efficiency is improved; the method has the advantages that low product percent of pass caused by artificial factors is reduced, the welding outer diameter of each layer is accurately controlled, the protrusion and lantern phenomena are reduced, meanwhile, requirements are provided for welding distance and surface treatment, the welding quality can be improved, requirements are provided for cooling and thermal stress elimination, the internal stress difference of a welded conductor can be effectively reduced, and the product stability performance is improved.

Description

Technical Field

[0001] The invention relates to the field of electric wires and cables, and in particular to a welding method and a welding frame for a submarine cable flexible joint conductor. Background Art

[0002] With the advancement of the construction of new power systems, offshore wind power has become one of the key directions for the construction of new energy power systems in the future. As a medium for current transmission, submarine cables need to meet the transmission distance of more than tens of kilometers.

[0003] Submarine cable flexible joint technology is a problem that restricts the delivery of long lengths of submarine cables. At the same time, the test circuit construction for submarine cable type tests must also include flexible joints. Submarine cable flexible joint technology mainly includes conductor welding, inner screen recovery, insulation extrusion and vulcanization degassing, outer screen recovery, water barrier layer recovery, lead sheath recovery, steel wire recovery and other key processes. Conductor welding is the first link, and the recovery quality plays a vital role in the subsequent processes and overall performance of the product. In addition, the standard also has specific strength requirements for conductors after welding.

[0004] Currently, many institutions have carried out research on submarine cable flexible joint technology and have successfully overcome some difficulties. However, the human factor in flexible joint technology is too high, and the operation results of personnel with different proficiency are also different. The product qualification rate needs to be improved. For example, the conductor welding strength is too low, resulting in failure of the overall tensile test, or the uneven degree of outer diameter protrusion after welding leads to eccentricity of the shielding and insulation layer.

[0005] Therefore those skilled in the art are committed to developing a conductor welding method and a welding frame. Summary of the invention

[0006] In view of the above-mentioned defects in the prior art, the technical problem to be solved by the present invention is to provide a cable conductor welding method and a welding frame to accelerate welding efficiency and improve cable welding quality.

[0007] To achieve the above-mentioned purpose, the present invention provides a cable conductor welding method and a welding frame, comprising the following steps: S1, welding end preparation: separating and cutting the conductor layer by layer, so that the angle between the end face of the single wire and the axis direction of the single wire is in the range of 30°-60°, and the axial spacing between the end faces of adjacent layers is 3-5 cm.

[0008] S2. Surface treatment: Use polar solvent to wipe off impurities on the surface of the copper wire and polish the burrs on the edge of the copper wire.

[0009] S3. Fixing the conductor: Fix the welding ends of the two conductors to be welded separately, keep the center of the conductor at the same height and the interval between the two welding ends is 1-1.5mm, and bend each layer of monofilament according to the original twisting pitch and the monofilament angles of the two conductors can correspond.

[0010] S4. Conductor cooling: Wrap the cooling tube around the two conductors to be welded. The cooling tube is 15-20 cm away from the welding part. The water flow rate is 2-2.5 L / min. The number of turns of the cooling tube is 2-4. The flow area of ​​the cooling tube is 0.5-5 mm 2 .

[0011] S5, clamping stage: Compress the single wire of the layer to be welded, the clamping force F i The value range is calculated by the following formula

[0012]

[0013] σ a =f(ε a )

[0014] Fa i =σ a ×π×D i ×b

[0015] 0.85Fa i ≤F i ≤Fa i

[0016] In the above formula, 1<i≤n, n is the number of layers, Fa i is the theoretical force value when each layer reaches the degree of compression, the compression band width is b, the outer diameter when welding the i-th layer is Di, S is the outline area of ​​the conductor, Dn is the diameter of the circle with S as the area, S' is the actual area of ​​the conductor, dn is the diameter of the circle with S' as the area, ε a is the strain when compressed from Dn to dn, σ a is the copper compression test a The stress at strain f(ε a ), the conductor compression coefficient is η, and Fa is obtained i After the value, the clamping force F i The value is 0.85Fa i -Fa i between;

[0017] S6, preheating step: before welding, use a hot air gun at 200-300℃ to heat the welding end for 3-5 minutes;

[0018] S7, welding: Then weld the whole layer by layer, welding the independent single wires of each layer together;

[0019] S8, grinding: after completing the welding of the i-th layer of conductor, grind the weld, and then use a polar solvent to remove stains on the conductor surface;

[0020] S9, thermal stress elimination: Use a 200-300℃ air gun to heat and blow air to the conductor welding end for 3-5 minutes and then allow it to cool naturally;

[0021] S10, wrapping: After the outermost conductor is welded, use products made of the same material as the cable to wrap it in the original wrapping direction.

[0022] A cable conductor welding frame is used in any of the cable conductor welding methods described above.

[0023] Preferably, it includes a base, wherein the base is respectively provided with a first support arm and a second support arm, the first support arm is provided with a first fixing clamp, the second support arm is provided with a second fixing clamp, the first fixing clamp and the second fixing clamp are respectively provided with a first wire passing hole and a second wire passing hole, and the axes of the first wire passing hole and the second wire passing hole coincide with each other.

[0024] Preferably, the first fixing clamp comprises a first upper pressing plate and a first lower pressing plate, and the first upper pressing plate and the first lower pressing plate are detachably connected;

[0025] The second fixing clamp includes a second upper pressing plate and a second lower pressing plate, and the second upper pressing plate and the second lower pressing plate are detachably connected.

[0026] Preferably, a slide rail is provided on the top of the base, and the bottom of the first support arm is slidably matched with the slide rail.

[0027] Preferably, it also includes a clamping device, which includes a clamping belt, an adjusting knob and a force gauge.

[0028] The beneficial effects of the present invention are as follows: the method of the present invention can change the compression range according to the compression coefficient and specifications of different welding conductors, digitize the entire welding process to the greatest extent, reduce the low product qualification rate caused by human factors, accurately control the outer diameter of each layer of welding, and reduce protrusions and lantern phenomena. At the same time, the patent puts forward requirements for welding distance and surface treatment, which can improve welding quality, and puts forward requirements for cooling and thermal stress elimination, which can effectively reduce the internal stress difference of the conductor after welding and improve the stability of the product. At the same time, the entire preparation process is simple and has low equipment requirements, and can be widely used in the welding preparation of submarine cable flexible joint conductors and other similar fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the assembly of a welding frame and a cable conductor in a specific implementation manner of the present invention.

[0030] Figure 2 It is a structural schematic diagram of a welding frame in a specific implementation manner of the present invention.

[0031] 1. Base; 21. First support arm; 22. First fixing clamp; 221. First upper pressure plate; 222. First lower pressure plate; 23. First wire hole; 31. Second support arm; 32. Second fixing clamp; 321. Second upper pressure plate; 322. Second lower pressure plate; 33. Second wire hole; 4. Slide rail; 5. Clamping device; 51. Clamping belt; 52. Adjustment knob; 53. Force gauge. DETAILED DESCRIPTION

[0032] The present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific manner, and therefore cannot be understood as limiting the present invention. The terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0033] like Figure 1-2 As shown, a cable conductor welding frame includes a base 1, on which a first support arm 21 and a second support arm 31 are respectively provided, and the first support arm 21 and the second support arm 31 have the same structure, a first fixing clamp 22 is provided on the first support arm 21, and a second fixing clamp 32 is provided on the second support arm 31, and a first wire passing hole 23 and a second wire passing hole 33 are respectively opened on the first fixing clamp 22 and the second fixing clamp 32, and the axes of the first wire passing hole 23 and the second wire passing hole 33 coincide with each other. In this embodiment, the first fixing clamp 22 and the second fixing clamp 32 are both made of relatively low hardness and strength materials such as nylon, rubber, and copper to avoid leaving marks on the conductor.

[0034] In this embodiment: the first fixing clamp 22 includes a first upper pressing plate 221 and a first lower pressing plate 222, and the first upper pressing plate 221 and the first lower pressing plate 222 are detachably connected. The second fixing clamp 32 includes a second upper pressing plate 321 and a second lower pressing plate 322, and the second upper pressing plate 321 and the second lower pressing plate 322 are detachably connected. In this embodiment, the detachable connection is a bolt connection, and the tightness of the fixing clamp can be adjusted by rotating the bolt. This design can adapt to more cables of different diameters and types, thereby improving the adaptation range of the present invention. A slide rail 4 is also provided on the top of the base 1, and the bottom of the first support arm 21 is slidably matched with the slide rail 4. In this embodiment, the two are clearance matched. When in use, the distance between the first fixing clamp 22 and the second fixing clamp 32 can be adjusted by sliding the first support arm 21.

[0035] In this embodiment: the cable conductor welding frame also includes a clamping device 5, which includes a clamping belt 51, a force adjustment knob 52 and a force indicator 53. When in use, the clamping belt 51 is used to clamp the single wire of the layer to be welded, and the tightness of the clamping belt can be adjusted by adjusting the knob 52. The force indicator 53 can intuitively display the current clamping force of the clamping belt 51.

[0036] The present invention also provides a cable conductor welding method, which is applied to the above-mentioned cable conductor welding frame and comprises the following steps:

[0037] S1. Preparation of welding end: Separate and cut the ends of the conductors to be welded layer by layer, so that the angle between the end face of the single wire and the axis direction of the single wire is in the range of 30°-60°, and the axial spacing between the end faces of adjacent layers is 3-5 cm.

[0038] S2. Surface treatment: Use a polar solvent to remove impurities on the surface of the copper wire. In this embodiment, the polar solvent is ethanol, and grind the burrs on the edge of the copper wire.

[0039] S3. Fix the conductor: insert the conductor welding ends processed in S1 into the first wire hole and the second wire hole on the cable conductor welding frame as described above, move the first upper pressing plate and the second upper pressing plate downward to fix the conductor ends, so that the axes of the two sections of conductor coincide or the centers of the conductors are at the same height, keep the interval between the two welding ends at 1-1.5mm, and bend each layer of monofilament according to the original twisting pitch and the monofilament angles of the two sections of conductor can correspond.

[0040] S4. Conductor cooling: Wrap the cooling tube around the two conductors to be welded. The cooling tube is 15-20 cm away from the welding part. The water flow rate is 2-2.5 L / min. The number of turns of the cooling tube is 2-4. The flow area of ​​the cooling tube is 0.5-5 mm 2 .

[0041] S5, clamping stage: Compress the single wire of the layer to be welded, the clamping force F i The value range is calculated by the following formula

[0042]

[0043] σ a =f(ε a )

[0044] Fa i =σ a ×π×D i ×b

[0045] 0.85Fa i ≤F i ≤Fa i

[0046] In the above formula, 1<i≤n, n is the number of layers, Fa i is the theoretical force value when each layer reaches the degree of compression, the compression band width is b, the outer diameter when welding the i-th layer is Di, S is the outline area of ​​the conductor, Dn is the diameter of the circle with S as the area, S' is the actual area of ​​the conductor, dn is the diameter of the circle with S' as the area, ε a is the strain when compressed from Dn to dn, σ a is the copper compression test a The stress at strain f(ε a ), the conductor compression coefficient is η, and Fa is obtained i After the value, the clamping force F i The value is 0.85Fa i -Fa i between;

[0047] S6. Preheating stage: Before welding, use a hot air gun at 200-300℃ to heat the welding area for 3-5 minutes.

[0048] S7, welding: and then welding the whole layer by layer, and then welding the independent single wires of each layer together. In this embodiment, acetylene welding or argon arc welding can be used to weld metal welding rods such as silver fiber welding rods and copper welding rods to each single wire connection.

[0049] S8. Grinding: After completing the welding of the i-th layer of conductor, use a grinder, sandpaper or other tools to grind the weld, and then use a polar solvent to remove stains on the conductor surface.

[0050] S9. Thermal stress elimination: After completing the welding of the i-th layer of conductor, use a 200-300℃ air gun to heat and blow air on the welding area for 3-5 minutes and then allow it to cool naturally.

[0051] S10. Wrapping: After the outermost conductor is welded, wrap semi-conductive nylon tape and polyester film around the outside of the conductor to avoid oxidation contamination of the conductor after welding. The specifications and grades of the semi-conductive nylon tape are the same as those used in the production of the conductor, and the wrapping needs to be carried out in the original wrapping direction.

[0052] More specifically, the following is an example of the welding process of cables of specific sizes:

[0053] Example 1 1600mm2 submarine cable flexible joint tight conductor welding

[0054] S1. Preparation of welding ends: separate and cut the conductors to be welded layer by layer, so that the angle between the end face of the single wire and the axis direction of the single wire is 30°, and the axial spacing between the end faces of adjacent layers is 3 cm.

[0055] S2. Surface treatment: use ethanol to wipe off impurities on the surface of the copper wire and grind the burrs on the edge of the copper wire.

[0056] S3, fix the conductor, insert the conductor welding ends processed in S1 into the first wire hole and the second wire hole on the cable conductor welding frame respectively, move the first upper pressing plate and the second upper pressing plate downward to fix the conductor ends, so that the axes of the two sections of the conductor coincide or the centers of the conductors are at the same height, the interval between the two welding ends is 1mm, and each layer of monofilaments is bent according to the original twisting pitch and the monofilament angles of the two sections of the conductor can correspond.

[0057] S4. Conductor cooling: Wrap the cooling tube around the two conductors to be welded. The cooling tube is 15 cm away from the welding part. The water flow rate is 2 L / min. The number of turns of the cooling tube is 2. The flow area of ​​the cooling tube is 5 mm. 2 .

[0058] S5. Compress the single wire of the layer to be welded, with a pressing force F i The value range is calculated by the following formula

[0059]

[0060] σ a =f(ε a )

[0061] Fa i =σ a ×π×D i ×b

[0062] 0.85Fa i ≤F i ≤Fa i

[0063] In the above formula, 1<i≤n, n is the number of layers, Fa i is the theoretical force value when each layer reaches the degree of compression, the compression band width is b, the outer diameter when welding the i-th layer is Di, S is the outline area of ​​the conductor, Dn is the diameter of the circle with S as the area, S' is the actual area of ​​the conductor, dn is the diameter of the circle with S' as the area, ε a is the strain when compressed from Dn to dn, σ a is the copper compression test a The stress at strain f(ε a ), the conductor compression coefficient is η, and Fa is obtained i After the value, the clamping force F i The value is 0.85Fa i -Fa i between.

[0064] The specific results are shown in Table 1.

[0065]

[0066] Table 1 Calculation parameters for welding of 1600mm2 submarine cable flexible joints and compressed conductors

[0067] S6, preheating stage, use 300℃ hot air gun to heat the welding area for 3 minutes.

[0068] S7. Welding: Use acetylene welding to weld the whole layer by layer, and weld the independent single wires of each layer together.

[0069] S8. Grinding: Use 200-mesh, 400-mesh, and 800-mesh sandpaper to grind the weld. The weld surface after grinding should be smooth and round, without defects such as sand holes and burrs, and then use ethanol to wipe off surface stains.

[0070] S9: To eliminate thermal stress, use a 300℃ air gun to heat and blow air to the welding area for 3 minutes and then allow it to cool naturally.

[0071] S10, in the wrapping process, the conductor that has been welded and cooled to room temperature is wrapped with semi-conductive nylon tape and polyester film to avoid oxidation contamination of the conductor after welding. The specifications and grades of the semi-conductive nylon tape are the same as those used in the production of the conductor, and the wrapping is carried out in the original wrapping direction.

[0072] In this embodiment: by testing and analyzing the samples after welding, the outer diameter of the outermost layer after welding is 48.9mm, compared with the protrusion of 0.5mm, the degree of protrusion is negligible, and there is no lantern or flipping phenomenon. The tensile strength of the product after welding is greater than 85% of the tensile strength of the unwelded conductor. Compared with the yield rate of 50% of the traditional welding method, the comprehensive yield rate of the product using this method can reach more than 95%.

[0073] Example 2 1200mm 2 Submarine cable flexible joint compression conductor welding

[0074] S1. Preparation of welding ends: Separate and cut the conductors to be welded layer by layer, so that the angle between the end face of the single wire and the axis direction of the single wire is 60°, and the axial spacing between the end faces of adjacent layers is 5 cm.

[0075] S2. Surface treatment: use ethanol to wipe off impurities on the surface of the copper wire and grind the burrs on the edge of the copper wire.

[0076] S3, fix the conductor, insert the conductor welding ends processed in S1 into the first wire hole and the second wire hole on the cable conductor welding frame facing each other, move the first upper pressing plate and the second upper pressing plate downward to fix the conductor ends, so that the axes of the two sections of the conductor coincide or the centers of the conductors are at the same height, the interval between the two welding ends is 1.5mm, and each layer of monofilaments is bent according to the original twisted pitch and the monofilament angles of the two sections of the conductor can correspond.

[0077] S4, conductor cooling, wind the cooling tube around the two conductors to be welded, the cooling tube is 20cm away from the welding part, the water flow rate is 2.5L / min, the number of turns of the cooling tube is 4, and the flow area of ​​the cooling tube is 0.5mm 2 .

[0078] S5. Compress the single wire of the layer to be welded, with a pressing force F i The value range is calculated by the following formula

[0079]

[0080] σ a =f(ε a )

[0081] Fa i =σ a ×π×D i ×b

[0082] 0.85Fa i ≤F i ≤Fa i

[0083] In the above formula, 1<i≤n, n is the number of layers, Fa i is the theoretical force value when each layer reaches the degree of compression, the compression band width is b, the outer diameter when welding the i-th layer is Di, S is the outline area of ​​the conductor, Dn is the diameter of the circle with S as the area, S' is the actual area of ​​the conductor, dn is the diameter of the circle with S' as the area, ε a is the strain when compressed from Dn to dn, σ a is the copper compression test a The stress at strain f(ε a ), the conductor compression coefficient is η, and Fa is obtained i After the value, the clamping force F i The value is 0.85Fa i -Fa i between.

[0084] The specific results are shown in Table 2.

[0085]

[0086] Table 2 1200mm 2 Calculation parameters for welding of compressed conductors of submarine cable flexible joints

[0087] S6, preheating stage, use 200 ℃ hot air gun to heat the welding area for 5 minutes.

[0088] S7. Welding: Use acetylene welding to weld the whole layer by layer, and weld the independent single wires of each layer together.

[0089] S8. Grinding: Use 200-mesh, 400-mesh, and 800-mesh sandpaper to grind the weld. The weld surface after grinding should be smooth and round, without defects such as sand holes and burrs, and then use ethanol to wipe off surface stains.

[0090] S9: To eliminate thermal stress, use a 200℃ air gun to heat and blow air to the welding area for 5 minutes and then allow it to cool naturally.

[0091] S10, in the wrapping process, the conductor that has been welded and cooled to room temperature is wrapped with semi-conductive nylon tape and polyester film to avoid oxidation contamination of the conductor after welding. The specifications and grades of the semi-conductive nylon tape are the same as those used in the production of the conductor, and the wrapping is carried out in the original wrapping direction.

[0092] In this embodiment: by testing and analyzing the samples after welding, the outer diameter of the outermost layer after welding is 42.2mm, compared with the protrusion of 0.4mm, the degree of protrusion is negligible, and there is no lantern or turning over phenomenon. The tensile strength of the product after welding is greater than 85% of the tensile strength of the unwelded conductor. Compared with the yield rate of 50% of the traditional welding method, the comprehensive yield rate of the product using this method can reach more than 95%.

[0093] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A cable conductor welding method, characterized in that: The following steps are involved: S1. Preparation of welding end: Separate and cut the conductor layer by layer, so that the angle between the end face of the single wire and the axis direction of the single wire is in the range of 30°-60°, and the axial spacing between the end faces of adjacent layers is 3-5 cm.

2. The cable conductor welding method according to claim 1, characterized in that: The following steps are involved: S2. Surface treatment: Use polar solvent to wipe off impurities on the surface of the copper wire and polish the burrs on the edge of the copper wire.

3. The cable conductor welding method according to claim 2, characterized in that: The following steps are involved: S3. Fixing the conductor: Fix the welding ends of the two conductors to be welded separately, keep the center of the conductor at the same height and the interval between the two welding ends is 1-1.5mm, and bend each layer of monofilament according to the original twisting pitch and the monofilament angles of the two conductors can correspond.

4. The cable conductor welding method according to claim 3, characterized in that: The following steps are involved: S4. Conductor cooling: Wrap the cooling tube around the two conductors to be welded. The cooling tube is 15-20 cm away from the welding part. The water flow rate is 2-2.5 L / min. The number of turns of the cooling tube is 2-4. The flow area of ​​the cooling tube is 0.5-5 mm 2 .

5. The cable conductor welding method according to claim 4, characterized in that: The following steps are also included: S5, clamping stage: Compress the single wire of the layer to be welded, the clamping force F i The value range is calculated by the following formula s a =f(e a ) Fa i =s a ×π×D i ×b <h2 style=";text-align:left;direction:ltr">0.85 Fa<h2 style=";text-align:left;direction:ltr"> i <h2 style=";text-align:left;direction:ltr"> ≤F<h2 style=";text-align:left;direction:ltr"> i <h2 style=";text-align:left;direction:ltr"> ≤Fa<h2 style=";text-align:left;direction:ltr"> i In the above formula, 1<i≤n, n is the number of layers, Fa i is the theoretical force value when each layer reaches the degree of compression, the compression band width is b, the outer diameter when welding the i-th layer is Di, S is the outline area of ​​the conductor, Dn is the diameter of the circle with S as the area, S' is the actual area of ​​the conductor, dn is the diameter of the circle with S' as the area, ε a is the strain when compressed from Dn to dn, σ a is the copper compression test a The stress at strain f(ε a ), the conductor compression coefficient is η, and Fa is obtained i After the value, the clamping force F i The value is 0.85Fa i -Fa i between; S6, preheating step: before welding, use a hot air gun at 200-300℃ to heat the welding end for 3-5 minutes; S7, welding: Then weld the whole layer by layer, welding the independent single wires of each layer together; S8, grinding: after completing the welding of the i-th layer of conductor, grind the weld, and then use a polar solvent to remove stains on the conductor surface; S9, thermal stress elimination: Use a 200-300℃ air gun to heat and blow air to the conductor welding end for 3-5 minutes and then allow it to cool naturally; S10, wrapping: After the outermost conductor is welded, use products made of the same material as the cable to wrap it in the original wrapping direction.

6. A cable conductor welding frame, characterized in that: Applicable to the cable conductor welding method as described in any one of claims 1 to 5.

7. The cable conductor welding frame according to claim 6, characterized in that: The invention comprises a base (1), wherein a first support arm (21) and a second support arm (31) are respectively arranged on the base (1), a first fixing clamp (22) is arranged on the first support arm (21), and a second fixing clamp (32) is arranged on the second support arm (31), and a first wire passing hole (23) and a second wire passing hole (33) are respectively opened on the first fixing clamp (22) and the second fixing clamp (32), and the axes of the first wire passing hole (23) and the second wire passing hole (33) coincide with each other.

8. The cable conductor welding frame according to claim 7, characterized in that: The first fixing clamp (22) comprises a first upper pressing plate (221) and a first lower pressing plate (222), and the first upper pressing plate (221) and the first lower pressing plate (222) are detachably connected; The second fixing clamp (32) comprises a second upper pressing plate (321) and a second lower pressing plate (322), and the second upper pressing plate (321) and the second lower pressing plate (322) are detachably connected.

9. The cable conductor welding frame according to claim 8, characterized in that: A slide rail (4) is provided on the top of the base (1), and the bottom of the first support arm (21) is slidably matched with the slide rail (4).

10. The cable conductor welding frame according to claim 9, characterized in that: It also comprises a pressing device (5), wherein the pressing device (5) comprises a pressing belt (51), an adjusting knob (52) and a force gauge (53).

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