Fixing device for improving insulation eccentricity and cable insulation extruder

Abstract

The fixing device comprises a base, a rotating part and a guide assembly, the base is used for being connected with a machine head of an extruder, the rotating part is rotationally connected to the base, a wire passing hole for a wire core to pass through is formed in the rotating part, and the guide assembly comprises a first guide part and a second guide part, one end of the first guide piece is arranged on the base, the other end of the first guide piece is arranged on the rotating piece, and the first guide piece is used for limiting the wire core relative to the center of the machine head. Lateral pressure is applied to the moving wire core through the guide assembly, a supporting structure is formed for the wire core, shaking of the wire core is reduced, an insulating layer can be extruded on the surface of the wire core more uniformly, and finally the technical effect of improving the quality of a cable product is achieved.

Description

Technical Field

[0001] This utility model relates to the field of cable insulation extrusion technology, and in particular to a fixing device for controlling the insulation eccentricity of a three-layer co-extrusion die head and a cable insulation extruder. Background Technology

[0002] Cable insulation extrusion is a crucial step in cable manufacturing, involving the continuous and uniform application of thermoplastic or thermosetting materials onto a conductor using an extruder to form one or more layers of insulation protection. Currently, cable insulation layers are formed by uniformly coating molten insulating material onto the conductor surface using an extruder, followed by cooling and solidification.

[0003] During the insulation extrusion process, due to the relatively long distance between the upper traction and the extruder head, the conductor core will experience slight shaking when entering the head. In particular, the deviation of the split conductor from the center will be larger. The insulation material extruded through the die may not cover the conductor core evenly, resulting in a large degree of eccentricity in one part of the insulation layer and a small degree of eccentricity in another part, causing a relatively large degree of randomness in the eccentricity of the insulation layer.

[0004] Insulation eccentricity refers to the phenomenon of the cable insulation layer deviating from the center during the manufacturing process, that is, the degree to which the central axis of the cable does not coincide with the axis of the outer insulation layer. This phenomenon will cause the electric field to concentrate in the eccentric part, increase the local electric field strength of the cable, and may cause local breakdown, leading to cable failure. At the same time, insulation eccentricity may also cause problems such as increased cable loss, increased local thermal resistance, and waste of raw materials, affecting the normal operation of the cable and manufacturing costs. Utility Model Content

[0005] This application provides a fixing device to improve insulation eccentricity, thereby solving the technical problem of large insulation layer eccentricity caused by suspended conductor cores. This application also provides a cable insulation extruder.

[0006] The first aspect of this application provides a fixing device for improving insulation eccentricity, comprising:

[0007] The base is used to connect to the extruder head;

[0008] A rotating component is rotatably connected to the base, and the rotating component has a wire-passing hole for the wire core to pass through;

[0009] The guiding assembly includes: a first guide member, one end of which is disposed on the base and the other end of which is disposed on the rotating member, the first guide member being used to limit the position of the wire core relative to the center of the machine head.

[0010] The beneficial effects of the above-mentioned embodiments are that the lateral pressure is applied to the moving wire core by the guide assembly, a supporting structure is formed on the wire core, the shaking of the wire core is reduced, the insulation layer can be more uniformly extruded on the surface of the wire core, and finally the technical effect of improving the quality of the cable product is achieved.

[0011] On the basis of the above-mentioned embodiments, the embodiments of the present application can also be improved as follows:

[0012] In one of the embodiments of the present application, the first guide has two, the first guide is arranged on the front surface of the rotating part in a symmetrical structure, and the axes of the two first guides are parallel to each other. The beneficial effect of this step is that the two first guides limit the wire core on both sides, thereby improving the stability of the movement of the wire core.

[0013] In one of the embodiments of the present application, the guide assembly further comprises a second guide, one end of the second rotating part is arranged on the base, and the other end is arranged on the rotating part. The beneficial effect of this step is that the second guide limits the wire core on the back surface of the rotating part, thereby improving the stability of the movement of the wire core.

[0014] In one of the embodiments of the present application, the second guide is arranged on the back surface of the rotating part in a symmetrical structure, and the axes of the two second guides are parallel to each other. The beneficial effect of this step is that the two second guides limit the wire core on both sides, thereby improving the stability of the movement of the wire core.

[0015] In one of the embodiments of the present application, the axes of the first guide and the second guide are perpendicular to each other. The beneficial effect of this step is that the first guide and the second guide limit in different directions, thereby greatly improving the stability of the movement of the wire core.

[0016] In one of the embodiments of the present application, it further comprises a handle, and the handle is connected to the rotating part. The beneficial effect of this step is that the handle facilitates the rotation of the rotating part.

[0017] In one of the embodiments of the present application, it further comprises a positioning part, the positioning part is arranged between the base and the rotating part, and the positioning part is used for positioning the rotating part relative to the base. The beneficial effect of this step is that the stability of the positioning of the guide assembly can be improved.

[0018] The first aspect of the present application provides a fixing device for improving the insulation eccentricity, BRIEF DESCRIPTION OF DRAWINGS

[0019] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0020] Figure 1 This is a schematic diagram of the fixing device;

[0021] Figure 2 for Figure 1 Schematic diagram of the structure along direction A;

[0022] Figure 3 for Figure 1 Schematic diagram of the structure of the middle edge BB;

[0023] Figure 4 A schematic diagram of the positioning wire core for the fixing device.

[0024] Among them, 1 is the base, 101 is the first connecting plate, 102 is the column, and 103 is the second connecting plate;

[0025] 2. Rotating component, 201 wire guide hole;

[0026] 3. Guide assembly, 301 first guide member, 302 shaft, 303 first support column, 304 third support column, 305 connecting rod, 306 second guide member;

[0027] 4 wire cores, 5 handles, 6 positioning components. Detailed Implementation

[0028] In this application, unless otherwise expressly specified and limited, the terminology used should be interpreted broadly. For example, a connection can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of different terms in this utility model according to the specific circumstances, and the scope of the specific meaning should be limited to achieving the function of this application.

[0029] In the description of this application, it should be understood that the directional terms or positional relationships described are based on the orientation or positional relationships shown in the accompanying drawings, or based on the orientation or positional relationships in actual use, and are only for the purpose of facilitating the description of the contents of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0030] like Figure 1 , 2As shown in the figure, a fixing device for improving insulation eccentricity comprises a base 1, a rotating part 2, and a guide assembly 3. The base 1 is used to be connected with the head of an extruder. The rotating part 2 is rotatably connected with the base 1. The rotating part 2 is provided with a wire passing hole 201 for allowing a wire core 4 to pass through. The guide assembly 3 comprises a first guide part 301. One end of the first guide part 301 is arranged on the base 1, and the other end is arranged on the rotating part 2. The first guide part 301 is used to limit the position of the wire core 4 relative to the center of the head.

[0031] Specifically, as shown in the figure, Figure 1 The base 1 comprises a first connecting disc 101, a stand 102, and a second connecting disc 103. The first connecting disc 101 is connected with the second connecting disc 103 through the stand 102. The first connecting disc 101 is connected with the head through bolts. The rotating part 2 is rotatably installed on the second connecting disc 103. The rotating part 2 is a circular rotating disc. The inner circle of the second connecting disc 103 is provided with a ring-shaped boss. The outer periphery of the rotating disc is provided with a ring-shaped groove matched with the boss. The groove is used to insert the boss. The rotating disc is rotatably sleeved on the inner circle of the second connecting disc 103 through the groove. The rotating disc is divided into an upper half and a lower half along the middle position of the groove. The upper half and the lower half can be connected through welding, bolt connection, or the like, so as to rotatably connect the rotating disc with the second connecting disc 103.

[0032] Specifically, as shown in the figure, Figure 1 , 2 The first guide part 301 has two symmetrical structures arranged on the front surface of the rotating part 2. The axes of the two first guide parts 301 are parallel to each other. The two first guide parts 301 limit the wire core 4 on both sides, thereby improving the stability of the movement of the wire core 4.

[0033] Specifically, as shown in the figure, Figure 1 , 2 The first guide part 301 is a guide roller. The guide assembly 3 further comprises a shaft body 302, a first supporting column 303, a third supporting column 304, and a connecting rod 305. The guide roller is rotatably installed on the shaft body 302 through a bearing. One end of the shaft body 302 is hinged to the first supporting column 303, and the other end is hinged to the connecting rod 305. The other end of the connecting rod 305 is hinged to the third supporting column 304. The first supporting column 303 is fixedly connected with the second connecting disc 103. The third supporting column 304 is fixedly connected with the rotating disc.

[0034] Specifically, as shown in the figure, Figure 1 , 3 The guide assembly 3 further comprises a second guide part 306. One end of the second guide part 306 is arranged on the base 1, and the other end is arranged on the rotating part 2. The second guide part 306 limits the wire core 4 on the back surface of the rotating part 2, thereby improving the stability of the movement of the wire core 4.

[0035] Specifically, as shown in Figure 1 、 3 , the second guide 306 is arranged on the back of the rotating member 2 in a symmetrical structure, the axes of the two second guides 306 are parallel to each other, and the wire core 4 is limited on both sides by the two second guides 306, thereby improving the stability of the movement of the wire core 4.

[0036] Specifically, as shown in Figure 1 、 2 , the axes of the first guide 301 and the second guide 306 are perpendicular to each other, and the second guide 306 is identical to the first guide 301 in other installation structures except for the installation orientation. As shown in the schematic diagram, the wire core 4 is limited in different directions by the first guide 301 and the second guide 306, thereby greatly improving the stability of the movement of the wire core 4. Specifically, the fixing device further comprises a handle 5, which is fixedly connected to the rotating member 2 by bolts. The handle 5 facilitates the rotation of the rotating member 2.

[0037] Specifically, as shown in Figure 1 、 2 , the fixing device further comprises a positioning member 6, which is arranged between the base 1 and the rotating member 2. The positioning member 6 is used to position the rotating member 2 relative to the base 1. The positioning member 6 is a bolt, and a threaded hole is formed in the outer periphery of the second connecting disc 103. The bolt is connected to the threaded hole and tightly presses the groove bottom of the rotating disc, thereby positioning the rotating disc. Specifically, in order to further improve the stability of the positioning, the end of the bolt is connected to an anti-skid rubber pad. The shape of the anti-skid rubber pad matches the shape of the outer periphery of the rotating disc. The anti-skid rubber pad tightly presses the rotating disc, thereby positioning the rotating disc.

[0038] The fixing device for improving the eccentricity of the insulation layer is used in the following way. As shown in Figure 4 , the device is connected to the head of the extruder through the base 1. The wire core 4 is inserted through the wire hole 201. The handle 5 is rotated, so that the first guide 301 and the second guide 306 rollingly contact the surface of the wire core 4. Then, the position of the rotating disc is locked by the positioning member 6, and the wire core 4 is limited by the guide assembly 3.

[0039] The fixing device uses four guide rollers that are parallel to each other in pairs. The wire core 4 is fixed from two perpendicular directions by the guide rollers, so that the wire core 4 always runs at the center position of the head. This reduces the risk of the wire core 4 deviating from the center line and increasing the eccentricity of the insulation layer. The eccentricity of the insulation layer is stable, and the eccentricity deviation of different sections is very small. According to the size of the conductor diameter, the distance between the guide rollers can be freely adjusted to ensure that the conductors of different sections can contact the guide rollers. The installation and disassembly are very convenient. The device can be removed at will during shutdown and disassembly, without changing the overall structure of the head and affecting normal operation. The device has good usability.

[0040] The split conductor is more suitable for large cross-section, and due to the fact that the cabling pitch and the strand torque are not 100% matched in the production process, a certain time is required for adjustment by the relay, and the split conductor has a certain deflection that cannot be released, under the traction tension of the crosslinking machine, the wire will still have a certain deviation from the center line of the machine head, at this time, the guide roller designed will give the wire core 4 a side pressure, so that the wire core 4 returns to the center position, so as to ensure that the wire core 4 always runs in the center position of the machine head.

[0041] Example two

[0042] A cable insulation extruder comprising the fixing device for improving insulation eccentricity disclosed in example one.

[0043] The above is only an embodiment of the present application, and the well-known specific structures and properties in the scheme are not described in detail, the ordinary skilled in the art knows all the ordinary technical knowledge in the technical field of the present application before the filing date or the priority date, can know all the prior art in the field, and has the ability to apply conventional experimental means before that date, the ordinary skilled in the art can improve and implement the present scheme based on their own ability under the inspiration given in the present application, and some typical known structures or known methods should not be an obstacle for the ordinary skilled in the art to implement the present application. It should be pointed out that for those skilled in the art, without departing from the structure of the present application, a number of modifications and improvements can be made, which should also be considered as the protection scope of the present application, and these will not affect the effect and practicality of the present application.

Claims

1. A fixing device for improving the insulation eccentricity, characterized in that The utility model relates to an improved insulation eccentricity fixing device, comprising: a base for connecting with the head of an extruder; a rotating member rotatably connected to the base, the rotating member having a wire passage for passing a wire core; a guide assembly comprising a first guide member, one end of the first guide member being arranged on the base and the other end being arranged on the rotating member, the first guide member being used for limiting the position of the wire core relative to the center of the head.

2. The fixture of claim 1, wherein The first guide member has two symmetric structures arranged on the front surface of the rotating member, and the axes of the two first guide members are parallel to each other.

3. The fixture of claim 2, wherein The guide assembly further comprises a second guide member, one end of the second guide member being arranged on the base and the other end being arranged on the rotating member.

4. The fixture of claim 3, wherein The second guide member has two symmetric structures arranged on the back surface of the rotating member, and the axes of the two second guide members are parallel to each other.

5. The fixture of claim 4, wherein The axes of the first guide member and the second guide member are perpendicular to each other.

6. The fixture of claim 1, wherein Further comprising: a handle connected to the rotating member.

7. The fixture of claim 1, wherein Further comprising: a positioning member arranged between the base and the rotating member, the positioning member being used for positioning the rotating member relative to the base.

8. A cable insulation extruder characterized by, The utility model relates to an improved insulation eccentricity fixing device, comprising any one of claims 1-7.

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