Flexible special cable for stirrer and preparation method of flexible special cable

Abstract

The invention discloses a flexible special cable for a stirrer and a preparation method of the flexible special cable. The flexible special cable comprises signal wire cores, power wire cores, control wire cores, a fixing frame and a jacket, the two ends of the fixing frame are circular, circular through holes are formed in the fixing frame, and signal wire cores are arranged in the circular through holes. A plurality of control wire cores are uniformly distributed in the middle of the fixing frame along the circle center connecting line of the circular parts at the two ends; inward arc-shaped grooves are formed in the two sides of the middle of the fixing frame; the number of the power wire cores and the number of the fixing frames are both two, the arc-shaped groove in one side of each fixing frame is attached to one power wire core, and the arc-shaped groove in one side of each fixing frame is attached to the circular part at one end of the other fixing frame. The outer sleeve is arranged outside a component formed after the power wire core and the fixing frame are attached. The cable core in the cable is fixed by adopting the fixing frame of which the two sides of the middle part are provided with the inwards concave arc-shaped grooves, the position of the cable core is relatively stable when the cable is twisted, the mutual interference quadrant caused by the position change between the cable cores in the twisting process is avoided, and the signal stability is better when the cable is applied to an occasion with higher information transmission precision.

Description

Technical Field

[0001] The invention relates to a flexible special cable for a mixer and a preparation method thereof, belonging to the technical field of cable preparation. Background Art

[0002] Signal transmission cables are used to carry a variety of information from simple signals to complex data in modern communication and data transmission systems. Cables are often bent, twisted, or subjected to other mechanical stresses during actual use. When the cable undergoes twisting, its internal structure changes will lead to impedance mismatch, increased signal crosstalk, increased signal attenuation, signal distortion at the connection point, and other problems, ultimately leading to signal quality degradation, the so-called "signal degeneration". This signal degradation and degeneration will significantly affect the integrity and reliability of data transmission, and the consequences are particularly serious when this signal degeneration occurs in high-frequency application scenarios. Existing cable structures cannot effectively overcome the signal degeneration problem caused by the torsional deformation of the cable itself. Summary of the invention

[0003] In order to solve the problems in the above-mentioned background technology, the present invention provides a flexible special cable for a mixer and a preparation method thereof.

[0004] The technical solution for achieving the purpose of the present invention is:

[0005] A flexible special cable for a mixer, comprising a signal core, a power core, a control core, a fixing frame and a jacket; the two ends of the fixing frame are circular and provided with circular through holes inside, and the signal core is arranged in the circular through holes; a plurality of control cores are evenly distributed along the center connecting lines of the circular parts at both ends in the middle of the fixing frame; inwardly concave arc grooves are provided on both sides of the middle of the fixing frame; the power core and the fixing frame are each provided with two, and each fixing frame is configured so that the arc groove on one side is fitted with one power core, and the arc groove on the other side is fitted with the circular part at one end of another fixing frame; the jacket is arranged on the outside of the component after the power core and the fixing frame are fitted.

[0006] A flexible special cable for a mixer in the present application uses a fixing frame with inwardly concave arc grooves on both sides of the middle to fix the wire core inside the cable, so that the position of the wire core is relatively stable when the cable is twisted, avoiding mutual interference quadrants caused by position changes between the wire cores during the twisting process, and having better signal stability when used in occasions with higher information transmission accuracy.

[0007] Specifically, after the signal core, power core, and control core are arranged, their outer contour is a rectangle, and the outer shell includes a pressurized coating layer and a protective layer arranged from the inside to the outside, and a plurality of tensile steel ropes arranged between the pressurized coating layer and the protective layer. The tensile steel ropes in the above structure are arranged at the corners of the rectangle, and their cross-section is rectangular after the overall preparation, which has better torsion resistance than the circular cross-section. The tensile steel ropes in the structure can offset part of the stress when the cable is bent or twisted, reduce the deformation of the internal core of the cable, and thus protect the internal structure of the cable.

[0008] Further or optionally, in order to make the overall stress inside the jacket material more uniform, the jacket is in the shape of a rectangle with rounded chamfers. This can effectively prevent stress concentration problems caused by uneven cooling during the cooling process of the jacket preparation process and prevent uneven aging in the stress concentration area during use.

[0009] Further or optionally, in order to make the stress of the outer jacket more uniform, tensile steel ropes are provided at the four corners of the outer jacket.

[0010] Further or optionally, in order to improve the deformation resistance of the outer jacket, the protective layer includes an outer protective layer, a reinforcement layer, and a protective layer, wherein the reinforcement layer is made of high-strength glass fiber to improve the impact resistance of the outer jacket.

[0011] Further or optionally, in order to improve the structural stability between the control core and the fixing frame, the control core includes a control core conductor and a control core insulation layer.

[0012] Further or optionally, in order to reduce the impact of electromagnetic spillover during the operation of the power core, the power core includes a power core conductor, a power core insulation layer and a magnetic disturbance layer composite layer from the inside to the outside, and the magnetic disturbance layer composite layer includes a tinned copper wire winding layer and a shielding reinforcement tape.

[0013] Further or optionally, in order to reduce electromagnetic interference and radio frequency interference, and at the same time achieve the purpose of improving current distribution and reducing resistance, the signal line core includes a plurality of signal line monomers twisted with each other and a signal line core protective layer and a signal line core magnetic interference layer arranged outside the signal line monomer, and the signal line monomer includes a signal line conductor and a signal line core insulation layer coated on the outside of the signal line conductor.

[0014] The present application also provides a method for preparing the above-mentioned flexible special cable for a mixer, which specifically comprises the following steps:

[0015] S1: The cable structure to be prepared by the method is determined according to the above-mentioned flexible special cable for a mixer;

[0016] S2: preparing cable core;

[0017] S3: preparing a protective layer.

[0018] Furthermore, in the above preparation steps, step S3 comprises:

[0019] A1: Place the signal wire core and control wire core in the fixing frame;

[0020] A2: The fixed frames are arranged side by side at a 45-degree angle, and the power line core is set tangent to the relatively long side of the fixed frame;

[0021] A3: Evenly apply ultra-fine talcum powder on the surface of the power line core and the fixed frame, and extrude the pressurized coating layer;

[0022] A4: Embedded tensile steel rope;

[0023] A5: Preparation of protective layer;

[0024] Among them, step A3 adopts a pressurized process, and step A5 adopts an extrusion dynamic vulcanization process.

[0025] In step S2, the outer diameter of the cable core is ≤25.0×16.0 mm, and the preparation process is as follows:

[0026] B1: Twisting tinned soft copper wire bundles to obtain a signal core conductor, and then extruding a signal core insulation layer on the outer layer of the signal core conductor to obtain a signal line monomer;

[0027] B2: The tinned soft copper wire is twisted in opposite directions to obtain the control wire core conductor, and then the signal control wire core insulation layer is extruded on the outer layer of the control wire core conductor to obtain the control wire core; the outermost galvanized copper wire of the control wire core conductor is left-handed;

[0028] B3: Twisting tinned soft copper wires to obtain a power core conductor, then extruding a power core insulation layer outside the power core conductor, and then wrapping a galvanized copper wire winding layer and a shielding reinforcement tape outside the power core insulation layer protective layer to prepare a power core;

[0029] B4: twisting the signal line conductor in a star-twisted manner, then extruding a signal core protective layer on the outside of the signal line conductor, and then wrapping a signal core magnetic flexure layer around the outside of the signal core protective layer to prepare a signal line core;

[0030] B5: Arrange the control wire cores in the fixing frame, arrange the signal wire cores against the fixing frame, and then fill the gaps in the fixing frame;

[0031] B6: Arrange the fixing frames side by side at 45 degrees, set the power line core in the arc-shaped groove in the middle of the fixing frame so that it is tangent to the signal line core, and then apply ultra-fine talcum powder.

[0032] In the above production process, each component is prepared separately and then assembled, and the protective layer adopts an extrusion dynamic vulcanization process. The layers are more tightly combined, the tensile strength of the cable is improved, and the service life of the cable in harsh environments can be greatly improved.

[0033] Further or optionally, in order to improve the flexibility and conductivity of the cable, the tinned soft copper wire used in step S2 is a Class 6 tinned soft conductor that complies with the VDE 0295 standard.

[0034] By adopting the above technical solution, the present invention has the following beneficial effects:

[0035] (1) A flexible special cable for a mixer in the present application uses a fixing frame with inwardly concave arc grooves on both sides of the middle to fix the wire core inside the cable, so that the position of the wire core is relatively stable when the cable is twisted, avoiding mutual interference quadrants caused by position changes between the wire cores during the twisting process, and having better signal stability when used in situations where information transmission accuracy is higher.

[0036] (2) The cross-section of a flexible special cable for a mixer in the present application is rectangular, which has better anti-torsion performance than a circular cross-section. The tensile steel rope in the structure can offset part of the stress when the cable is bent or twisted, reducing the deformation of the internal core of the cable and thus protecting the internal structure of the cable.

[0037] (3) The jacket of the present application is a rectangle with rounded chamfers, which can effectively prevent the stress concentration problem caused by uneven cooling in the cooling process of the jacket preparation process and prevent uneven aging in the stress concentration area during use.

[0038] (4) The protective layer of the present application includes an outer protective layer, a reinforcement layer, and a protective layer, wherein the reinforcement layer is made of high-strength glass fiber to enhance the impact resistance of the outer jacket, and has higher anti-deformation performance.

[0039] (5) The outer layer of the control wire core of the present application is provided with an insulating layer, which not only plays an insulating role, but also can form a buffer between the control wire core and the fixing frame, so that the signal wire core has better stability.

[0040] (6) The outer layers of the control core and the power core of the present application are both provided with a magnetic interference layer composite structure, which can effectively reduce the signal interference between the cores during operation and enhance the shielding effect of the cores.

[0041] (7) The signal wire core of the present application adopts a star-twisted structure, which can effectively reduce electronic interference and radio frequency interference, while improving the current distribution inside the cable and reducing the wire core resistance.

[0042] (8) The protective layer of the flexible cable of the present application has a multi-layer structure, wherein the internal reinforcement layer is made of high-strength glass fiber, and the protective layer is made of polyurethane elastomer. This structure has better anti-torsion effect than general structures.

[0043] (9) The present application also provides a very simple flexible cable production process. After the core is assembled, the outer layer is produced using an extrusion dynamic vulcanization process. The layers are directly combined more tightly, the cable has better tensile strength and longer service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below according to specific embodiments and in conjunction with the accompanying drawings, wherein

[0045] Figure 1 It is a schematic diagram of the structure of the present invention.

[0046] The reference numerals in the accompanying drawings are:

[0047] Signal line core 1, signal line monomer 11, signal line conductor 111, signal line core insulation layer 112, signal line core protective layer 12, signal line core magnetic interference layer 13, power line core 2, power line core conductor 21, power line core insulation layer 22, magnetic interference layer composite layer 23, tinned copper wire winding layer 231, shielding reinforcement tape 232, control line core 3, control line core conductor 31, control line core insulation layer 32, fixing frame 4, jacket 5, pressurized coating layer 51, protective layer 52, outer sheath 521, reinforcement layer 522, protective layer 523, tensile steel rope 53. DETAILED DESCRIPTION

[0048] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0049] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0050] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0052] In the description of the embodiments of the present invention, it should be understood that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is conventionally placed when used, or are the orientations or positional relationships conventionally understood by those skilled in the art. They 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 orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0053] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The present invention is further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the scope of protection of the present invention.

[0054] (Example 1)

[0055] Figure 1 This is a schematic diagram of the structure of a flexible special cable for a mixer according to the present application.

[0056] The flexible cable of the present application includes a signal core 1, a power core 2, a control core 3, a fixing frame 4 and a jacket 5; the two ends of the fixing frame 4 are circular and have circular through holes inside, and the signal core 1 is arranged in the circular through holes; a plurality of control cores 3 are evenly distributed in the middle of the fixing frame 4 along the center connecting line of the circular parts at both ends; arc-shaped grooves concave inward are arranged on both sides of the middle of the fixing frame 4; the power core 2 and the fixing frame 4 are each provided with two, and each fixing frame 4 is configured so that the arc-shaped groove on one side is fitted with one power core 2, and the arc-shaped groove on the other side is fitted with the circular part at one end of another fixing frame 4; the jacket is arranged on the outside of the component after the power core 2 and the fixing frame 4 are fitted.

[0057] The outer shell 5 includes a pressurized coating layer 51 and a protective layer 52 which are sequentially arranged from the inside to the outside, and a plurality of tensile steel ropes 53 arranged between the pressurized coating layer 51 and the protective layer 52 .

[0058] The protective layer 52 includes an outer protective layer 521 , a reinforcement layer 522 , and a protective layer 523 .

[0059] Figure 1 The adjacent fixing frames 4 are arranged in parallel at 45°, the signal core 1 at one end of the second fixing frame 4 is just placed in the arc groove of the first fixing frame 4, and then the power core 1 is placed in the arc grooves on both sides of the fixing frame 4. After the arrangement is completed, the signal core 1 in the first fixing frame 4 and the second fixing frame 4 and the power core 2 on one side are located on the same straight line. After the arrangement is completed, the four signal cores 1 and the two power cores 2 in the figure form a 3*2 rectangle, and the two adjacent cores are tangent to each other; after the arrangement work is completed, the jacket 5 is produced in layers.

[0060] The reinforcing layer 522 is made of high-strength glass fiber, and the protective layer 523 is made of polyurethane elastomer.

[0061] The material and thickness of the pressurized coating layer 51 and the protective layer 52 have a great influence on the actual parameters such as the toughness and fire resistance of the cable. In the scheme of the present application, the pressurized coating layer 51 and the outer protective layer 521 are made of a mixed material of polypropylene + rubber elastomer; the thickness of the pressurized coating layer 51 is 1.5~2.5mm, and the outer diameter is not more than 30.0×21.0mm; the thickness of the outer protective layer 521 is 2.8~3.5mm, and the outer diameter is not more than 37.5×28.5mm.

[0062] The fixing frame 4 is an integrated symmetrical structure, specifically made of elastic foamed TPV material, and its signal core 1 is coated on both ends of the fixing frame 4. The minimum thickness of the outer side of the signal core 1 is 0.4mm, and the thickness range of the arc groove position in the middle of the fixing frame 4 is 1.5mm to 1.8mm.

[0063] The elastic foaming TPV material comprises the following components: 50-60 parts of EPDM rubber, 30-40 parts of polypropylene, 60-110 parts of processing aid, and the extrusion temperature is controlled at 200-220°C.

[0064] The outer layer of the fixing frame 4 is coated with ultra-fine talcum powder, so that when the flexible cable is twisted, the core itself does not twist, thereby reducing the influence of the twisting process on the core.

[0065] The control core 3 includes a control core conductor 31 and a control core insulation layer 32 .

[0066] The power core 2 includes a power core conductor 21 , a power core insulation layer 22 and a magnetic disturbance layer composite layer 23 from inside to outside. The magnetic disturbance layer composite layer 23 includes a tinned copper wire winding layer 231 and a shielding reinforcement tape 232 .

[0067] The signal line core 1 includes a plurality of signal line monomers 11 twisted together, a signal line core protection layer 12 and a signal line core magnetic disturbance layer 13 arranged outside the signal line monomer 11 , and the signal line monomer 11 includes a signal line conductor 111 and a signal line core insulation layer 112 coated outside the signal line conductor 111 .

[0068] The preparation method of the above-mentioned flexible special cable for a mixer is carried out in a step-by-step preparation and reassembly manner, comprising the following steps:

[0069] S1: The cable structure to be prepared by the method is determined according to the above-mentioned flexible special cable for a mixer;

[0070] S2: preparing cable core;

[0071] S3: preparing a protective layer 5.

[0072] Wherein, the step S3 comprises:

[0073] A1: Place the signal wire core 1 and the control wire core 3 in the fixing frame 4;

[0074] A2: The fixing frames 4 are arranged side by side at an angle of 45 degrees, and the power line core 2 is arranged tangent to the relatively long sides of the fixing frames 4;

[0075] A3: Ultra-fine talcum powder is evenly coated on the surface of the arranged power line core 2 and the fixing frame 4, and a pressurized coating layer 51 is extruded;

[0076] A4: embedded tensile steel rope 53;

[0077] A5: preparing a protective layer 52;

[0078] Among them, step A3 adopts a pressurized process, and step A5 adopts an extrusion dynamic vulcanization process.

[0079] In the specific preparation, the extrusion process of step A5 adopts an extrusion dynamic vulcanization process, and the basic process adopts twin-screw mixing extrusion. During the extrusion process, attention should be paid to zoning treatment. The specific zoning parameters are: first zone 175°C; second zone 185°C; third zone 195°C; fourth zone 195°C; fifth zone 220°C; sixth zone 230°C.

[0080] In step S2, the outer diameter of the cable core is ≤25.0×16.0 mm, and the preparation process is as follows:

[0081] B1: Twisting tinned soft copper wire bundles to obtain a signal core conductor 111, and then extruding a signal core insulation layer 112 on the outer layer of the signal core conductor 111 to obtain a signal line monomer 11;

[0082] B2: The tinned soft copper wire is twisted in opposite ways to obtain the control wire core conductor 31, and then the signal control wire core insulation layer 32 is extruded on the outer layer of the control wire core conductor 31 to obtain the control wire core 3; the galvanized copper wire of the outermost layer of the control wire core conductor 31 is left-handed;

[0083] B3: Twisting tinned soft copper wires to obtain a power core conductor 21, then extruding a power core insulation layer 22 outside the power core conductor 21, and then wrapping a galvanized copper wire winding layer 231 and a shielding reinforcement tape 232 around the protective layer of the power core insulation layer 22 to obtain a power core 2;

[0084] B4: twisting the signal line monomer 11 in a star-twisted manner, then extruding the signal core protection layer 12 on the outside of the signal line monomer 11, and then wrapping the magnetic interference layer composite layer 23 on the outside of the signal core protection layer 12 to prepare the signal line core 1;

[0085] B5: Arrange the control wire core 3 in the fixing frame 4, arrange the signal wire core 1 against the fixing frame 4, and then fill the gap of the fixing frame 4;

[0086] B6: Arrange the fixing frames 4 side by side at 45 degrees, set the power line core 2 in the arc-shaped groove in the middle of the fixing frame 4 so that it is tangent to the signal line core 1, and then apply ultra-fine talcum powder.

[0087] Specifically, in the preparation process B1 of the signal line monomer 11, a multi-layer twisting method is adopted in the twisting process of the tinned soft copper wire, and the twisting directions of the two adjacent layers are opposite. The specific number of twisted wires is set to 3+8+14+20; during the twisting process, the pitch is controlled to be 22-27mm during the left-hand regular arrangement bundle twisting in the same direction. After the twisting is completed, the diameter of the conductor in the signal line monomer 11 is not greater than 1.05mm to control the overall diameter range of the signal line core 1 and the cable. The signal line core 1 contains at least 42 0.145mm tinned soft round copper wires.

[0088] In the subsequent preparation step B4, the signal core protection layer 12 is extruded by a 45-speed pressurized process, and the line speed is controlled at 60-70 m / min; the extrusion temperature is:

[0089] 165℃→172℃→182℃→186℃→194℃→210℃; the thickness of the signal core protection layer 12 is not less than 0.5mm, and the outer diameter of the signal core is not more than 2.15mm;

[0090] During the star-twisting process of the signal line monomer 11, the twisting pitch of the signal line monomer 11 is 40-50mm, the outer diameter after twisting is not more than 5.3mm, the thickness of the signal core protection layer 12 is not less than 0.5mm, the signal line core magnetic disturbance layer 13 adopts tinned soft round copper wire cross-shielding method, the crossing angle is 40-50°, the coverage rate is 80-82%, and the outer diameter of the signal line core 1 is not more than 7.2mm.

[0091] The control core 3 includes an internal control core conductor 31 and a control core insulation layer 32 arranged outside the control core conductor 31. In the preparation step B2 of the control core 3, the tinned soft copper wire is obtained by regular twisting. At least 45 0.195mm tinned soft round copper wires are used in the twisting process. The twisting pitch of the control core conductor 31 is 12-20mm, 15-25mm, 20-35mm, and 30-39mm from the inside to the outside. After twisting, the outer diameter of the control core conductor 31 is not greater than 1.61mm. During the production process of the control core insulation layer 32, a 45-machine pressurized process is used, and the line speed is controlled at 50-60m / min; the extrusion temperature is: 161℃→170℃→176℃→180℃→190℃→215℃; the thickness of the control core insulation layer 32 is not less than 0.7mm, and the outer diameter of the control core 3 is not greater than 3.0mm.

[0092] The power core 2 includes a power core conductor 21, a power core insulation layer 22 and a magnetic interference composite layer 23, wherein the power core conductor 21 is twisted into the conductive part of the power core 2, the power core insulation layer 22 is extruded and arranged on the outer layer of the power core conductor 21, and the magnetic interference composite layer 23 is arranged on the outer layer of the power core insulation layer 22, which specifically includes a galvanized copper wire winding layer 231 and a shielding reinforcement tape 232. The function of the magnetic interference composite layer 23 is to provide structural support for the inner layer and prevent the magnetic field caused by the internal current from overflowing, thereby reducing the influence of the power core 2 on the signal core and the control core 3, and improving the stability of the cable operation.

[0093] In the preparation step B3 of the power core 2, the tinned soft copper wire is twisted in a regular manner to obtain the power core conductor 21, and at least 27 0.195mm tinned soft round copper wires are included in the twisting process. The twisting pitches of the power core bundle stranded wire conductor bundle are 20-28mm, 22-30mm, and 33-35mm from the inside to the outside, respectively. Then, the power core bundle stranded wire conductor is used as a strand and is twisted in a 1+6 arrangement to obtain the power core conductor 21. The twisting pitch is controlled to be 70-85mm and the outer diameter after twisting is controlled to be no more than 3.2mm; the outer power core insulation layer 22 is pressurized and extruded by a 50 machine, and the line speed is controlled to be 45-55m / min during the extrusion process; the extrusion temperature is divided into 168℃→178℃→188℃→198℃→205℃→220℃; the thickness of the power core insulation layer 22 is not less than 1.2mm, and the outer diameter of the power core 2 is not more than 8.0mm;

[0094] The tinned soft copper wire used in the above twisting process is a Class 6 tinned soft conductor that complies with the VDE 0295 standard.

[0095] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A flexible special cable for a mixer, characterized by: The invention comprises a signal wire core (1), a power wire core (2), a control wire core (3), a fixing frame (4) and a jacket (5); the two ends of the fixing frame (4) are circular and are provided with circular through holes inside, and the signal wire core (1) is arranged in the circular through holes; a plurality of control wire cores (3) are evenly distributed in the middle of the fixing frame (4) along the center connecting line of the circular parts at the two ends; arc-shaped grooves concave inwards are provided on both sides of the middle of the fixing frame (4); the power wire core (2) and the fixing frame (4) are each provided with two, and each fixing frame (4) is configured so that the arc-shaped groove on one side is fitted with one power wire core (2), and the arc-shaped groove on the other side is fitted with the circular part at one end of another fixing frame (4); the jacket is arranged outside the component after the power wire core (2) and the fixing frame (4) are fitted.

2. The flexible special cable for mixer according to claim 1, characterized in that: The outer shell (5) comprises a pressurized coating layer (51) and a protective layer (52) which are arranged in sequence from the inside to the outside, and a plurality of tensile steel ropes (53) arranged between the pressurized coating layer (51) and the protective layer (52).

3. A flexible special cable for a mixer according to claim 2, characterized in that: The outer sleeve (5) is in the shape of a rectangle with rounded chamfered corners.

4. The flexible cable for mixer according to claim 1, characterized in that: The protective layer (52) comprises an outer protective layer (521), a reinforcement layer (522), and a protective layer (523).

5. The flexible cable for mixer according to claim 1, characterized in that: The control line core (3) comprises a control line core conductor (31) and a control line core insulation layer (32).

6. The flexible special cable for mixer according to claim 1, characterized in that: The power line core (2) comprises, from the inside to the outside, a power line core conductor (21), a power line core insulation layer (22) and a magnetic disturbance layer composite layer (23), wherein the magnetic disturbance layer composite layer (23) comprises a tinned copper wire winding layer (231) and a shielding reinforcement tape (232).

7. The flexible cable for mixer according to claim 1, characterized in that: The signal line core (1) comprises a plurality of signal line monomers (11) twisted together, a signal line core protection layer (12) and a signal line core magnetic disturbance layer (13) arranged outside the signal line monomer (11), and the signal line monomer (11) comprises a signal line conductor (111) and a signal line core insulation layer (112) coated outside the signal line conductor (111).

8. The method for preparing a flexible special cable for a mixer according to claim 1, characterized in that The following steps are involved: S1: The cable structure to be prepared by the method according to the flexible special cable for mixer as described in claim 1; S2: preparing cable core; S3: Preparing a jacket (5).

9. The method for preparing a flexible special cable for a mixer according to claim 8, characterized in that: The step S3 comprises: A1: Place the signal wire core (1) and the control wire core (3) in the fixing frame (4); A2: The fixing frames (4) are arranged side by side at an angle of 45 degrees, and the power line core (2) is arranged tangent to the relatively long sides of the fixing frames (4); A3: evenly coating the surfaces of the arranged power line core (2) and the fixing frame (4) with ultra-fine talcum powder, and extruding a pressurized coating layer (51); A4: embedded tensile steel rope (53); A5: preparing a protective layer (52); Among them, step A3 adopts a pressurized process, and step A5 adopts an extrusion dynamic vulcanization process.

10. The method for preparing a flexible special cable for a mixer according to claim 9, characterized in that: In step S2, the outer diameter of the cable core is ≤25.0×16.0 mm, and the preparation process is as follows: B1: Twisting a tinned soft copper wire bundle to obtain a signal line conductor (111), and then extruding a signal line core insulation layer (112) on the outer layer of the signal line conductor (111) to obtain a signal line monomer (11); B2: The tinned soft copper wires are twisted in opposite directions to obtain a control wire core conductor (31), and then a signal control wire core insulation layer (32) is extruded on the outer layer of the control wire core conductor (31) to obtain a control wire core (3); the outermost galvanized copper wire of the control wire core conductor (31) is left-handed; B3: Twisting tinned soft copper wires to obtain a power core conductor (21), then extruding a power core insulation layer (22) outside the power core conductor (21), and then wrapping a galvanized copper wire winding layer (231) and a shielding reinforcement tape (232) around the protective layer of the power core insulation layer (22) to obtain a power core (2); B4: twisting the signal line monomer (11) in a star-twisted manner, then extruding the signal core protection layer (12) outside the signal line monomer (11), and then wrapping the magnetic disturbance layer composite layer (23) outside the signal core protection layer (12) to prepare a signal line core (1); B5: Arrange the control wire core (3) in the fixing frame (4), arrange the signal wire core (1) against the fixing frame (4), and then fill the gap of the fixing frame (4); B6: Arrange the fixing frames (4) side by side at a 45° angle, place the power line core (2) in the arc-shaped groove in the middle of the fixing frames (4) so ​​that it is tangent to the signal line core (1), and then apply ultra-fine talcum powder.

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