CN212392023U - Anti-interference variable frequency cable - Google Patents

Abstract

The utility model relates to a cable field discloses an anti-interference variable frequency cable, including the cable core, cable core overcoat is equipped with shrink extension layer, and shrink extension layer includes a plurality of shrink extension pieces that evenly arrange along cable length direction to and the setting element of connecting between the adjacent shrink extension piece. The wire core has good ductility, is bent when being convenient to use, and can effectively reduce the probability of rolling and sliding of the wire core.

Description

Anti-interference variable frequency cable

Technical Field

The utility model relates to a cable field particularly, relates to an anti-interference variable frequency cable.

Background

The frequency conversion technology is a technological revolution in the electromechanical field in recent years, and the application of the frequency conversion speed regulation system is more and more popular, and correspondingly, higher requirements are also put forward on a power cable and a control cable of a frequency conversion motor and a frequency conversion controller which are connected with the speed regulation system so as to avoid the interference of higher harmonic current generated in the operation on other power supply and control loops or the interference of external electromagnetic signals. Meanwhile, most of the variable frequency cables have poor strength, so that the service life is influenced.

Patent No. CN109903894A, entitled "high-strength anti-interference frequency conversion cable" provides a high-strength anti-interference frequency conversion cable with a new structure, which can effectively reduce the generation of higher harmonic current, and has high strength and better pressure resistance, but the proposed cable still has the following problems when in use:

1. the cable is more in number of layers, and each layer has stronger compactness and poorer ductility, so that the cable is inconvenient to bend when in use;

2. the three power wire cores are easy to roll and rotate in the sleeve layer, so that the wire cores slide and are twisted off in the using process.

The present application is made in view of this feature.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an anti-interference variable frequency cable, it has better ductility, buckles when facilitating the use, and can effectively reduce the probability that the sinle silk takes place to roll and slide.

The embodiment of the application is realized by the following technical scheme:

the utility model provides an anti-interference variable frequency cable, includes the cable core, cable core overcoat is equipped with shrink extension layer, and shrink extension layer includes a plurality of shrink extension pieces that evenly arrange along cable length direction to and the setting element of connecting between the adjacent shrink extension piece.

Furthermore, the contraction and expansion piece is an expansion joint, two ends of the contraction and expansion piece are respectively connected with adjacent positioning pieces, and the inner side wall of each positioning piece is connected with the cable core.

Further, the cable core includes three power sinle silks and three neutral sinle silks, and three power sinle silks become regular triangle and set up, three the neutral sinle silk becomes regular triangle and sets up, and the lateral wall of an arbitrary neutral sinle silk contacts with the lateral wall of two arbitrary power sinle silks respectively.

Furthermore, soft tightening strips are arranged in a cavity defined by the three power wire cores, and a tightening layer is sleeved between the cable wire core and the contraction and extension layer.

Furthermore, the side wall of the soft extrusion strip is provided with three cambered surface positioning grooves matched with the outer side wall of the power wire core.

Furthermore, a shielding layer is sleeved between the compaction layer and the contraction and extension layer and is woven by annealed copper wires or tinned copper wires with the diameter of 0.4-0.5 mm.

Further, cable core overcoat is equipped with the crowded tight layer, and cable core includes three power sinle silks and three neutral sinle silks, and three power sinle silks are worked out with the twist form and are formed to with crowded tight inlayer inner wall crowded tightly, crowded tight inlayer lateral wall becomes the heliciform and evenly opens the lateral wall matched with holding tank with three neutral sinle silks.

The utility model provides a pair of anti-interference variable frequency cable's beneficial effect is:

(1) the shrinkage and extension layer is arranged to cope with the condition of inconvenient bending in the use process of the cable, the shrinkage and extension layer is arranged to be in a form of staggered connection of the shrinkage and extension pieces and the positioning pieces, so that on one hand, the shrinkage and extension performance of the shrinkage and extension pieces is used for making adaptive matching on the bent and bent cable and matching with the shrinkage and extension of the bending section, on the other hand, the positioning pieces are used for relatively fixing the position of each shrinkage and extension piece in the length direction of the cable, and the shrinkage and extension pieces are prevented from sliding or stacking along the cable in the shrinkage or extension process;

(2) the telescopic extension piece is set to be a telescopic joint, so that the contraction characteristic and the extension characteristic are met, specifically, the positioning piece is in a sleeve shape, the inner side wall of the positioning piece is connected with the cable core, the positioning piece and the cable core are relatively fixed, on the basis, two ends of the telescopic extension piece (the telescopic joint) are respectively connected with the positioning piece, two ends of the telescopic extension piece and the cable core are relatively fixed, and only when the cable core at the position corresponding to the telescopic extension piece is bent, the telescopic extension piece can make corresponding contraction and extension matching;

(3) the power wire cores and the central wire cores are arranged in the regular triangle manner, so that the bending difficulty of the cable wire cores can be in a similar state when bending occurs in each direction, and the situations that part of the directions are easy to bend and part of the directions are extremely difficult to bend can be avoided;

(4) the three power wire cores are tightly squeezed by arranging the squeezing strip and the squeezing layer to enable the squeezing strip and the squeezing layer to be matched internally and externally, so that the anti-vibration and anti-squeezing performance is improved, meanwhile, the power wire cores are prevented from rolling and rotating in the sleeve layer, and the power wire cores are prevented from slipping and twisting off in the using process;

(5) by arranging the cambered surface positioning groove, a part of the power wire core is embedded into the soft tightening strip, so that the power wire core is prevented from rolling and sliding unnecessarily;

(6) through weaving three power sinle silks with the twist form, the degree of difficulty when making cable core buckle towards all directions all keeps unanimous, it is easy further to avoid taking place partial direction and buckle, the difficult condition of partial direction buckle, through setting up the holding tank, fix three neutral sinle silks, and through setting up the holding tank heliciform, make neutral sinle silks distribute around three power sinle silks of twist form, thereby make the difficult degree of difficulty of buckling in the whole cable core all directions keep unanimous almost, in order to adapt to the ascending bending of all directions.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

Fig. 1 is a schematic view of an anti-interference variable frequency cable provided in an embodiment of the present invention;

fig. 2 is a schematic radial cross-sectional view of an anti-interference variable frequency cable according to an embodiment of the present invention;

fig. 3 is a schematic cross-sectional view of the anti-interference frequency conversion cable provided by the present invention, the layer is tightly squeezed in the length direction.

Icon: 10-a shrink-stretched layer; 11-a contracted extension; 12-a positioning element; 20-a power wire core; 21-neutral core; 30-soft tightening strip; 31-arc surface positioning groove; 40-a compaction layer; 41-an accommodating groove; 50-shielding layer.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present application, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually placed when the product of the application is used, the description is only for convenience and simplicity, and the indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation and be operated, and thus, should not be construed as limiting the present application.

In the description of the present application, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Example 1

Referring to fig. 1 and fig. 2, the present embodiment provides an anti-interference frequency conversion cable, which includes a cable core, a contraction and extension layer 10 is sleeved outside the cable core, the contraction and extension layer 10 includes a plurality of contraction and extension pieces 11 uniformly arranged along a length direction of the cable, and a positioning piece 12 connected between adjacent contraction and extension pieces 11. Through setting up shrink extension layer 10 to the inconvenient condition of buckling in coping with the cable use, through the form that sets up shrink extension layer 10 into shrink extension 11 and setting element 12 cross connection, on the one hand through the shrink extension performance of shrink extension 11 to crooked, the adaptability cooperation is made to the cable of buckling, cooperation bending segment shrink or extension, on the other hand, make the position of each section shrink extension 11 relatively fixed on the length direction of cable through setting element 12, prevent that shrink extension 11 from shrinking or the in-process that extends from sliding along the cable or piling up in a department.

For further explanation of the contraction and expansion layer 10, the contraction and expansion member 11 is an expansion joint, two ends of the contraction and expansion member 11 are respectively connected with the adjacent positioning members 12, and the inner side walls of the positioning members 12 are connected with the cable cores. Through setting up flexible extension 11 to the telescopic joint, satisfy shrink characteristic and extension characteristic simultaneously, specifically, setting element 12 is cover tube-shape, its inside wall and cable core connection, thereby with self and cable core relatively fixed, on this basis, the both ends of flexible extension 11 (telescopic joint) are connected with a setting element 12 respectively, thereby extend 11 both ends of extension and cable core relatively fixed with the shrink, only when the cable core that the extension that contracts 11 corresponds the department takes place to buckle, this section shrink extension 11 just can make the shrink that corresponds and extend the cooperation.

In order to make the reasonable, the buckling of each direction of being convenient for to cooperate of cable core's inner structure, cable core includes three power sinle silk 20 and three neutral sinle silk 21, and three power sinle silk 20 become regular triangle and set up, three neutral sinle silk 21 becomes regular triangle and sets up, and the lateral wall of an arbitrary neutral sinle silk 21 contacts with the lateral wall of two arbitrary power sinle silks 20 respectively. Regular triangle's mode of setting up can all be in similar situation at the difficult condition of buckling of messenger's cable core when taking place the buckling of all directions, can not produce the condition that some directions are buckled easily, some directions are extremely difficult to buckle.

In order to further fix and support the power wire cores 20 and further improve the performance of interference conditions such as vibration resistance and extrusion resistance of the cable, soft extrusion strips 30 are arranged in a cavity enclosed by the three power wire cores 20, and an extrusion layer 40 is sleeved between each cable wire core and the corresponding contraction and extension layer. The internal and external matching of the tightening strip 30 and the tightening layer 40 tightly squeezes the three power wire cores 20, so that the vibration resistance and the extrusion resistance are improved, meanwhile, the power wire cores 20 are prevented from rolling and rotating in the jacket layer, and the condition that the power wire cores 20 slide and are twisted off in the use process is prevented.

In order to further fix the relative position of the power wire core 20, the sidewall of the soft tightening strip 30 is provided with three cambered surface positioning grooves 31 matched with the outer sidewall of the power wire core 20, the sidewall of the power wire core 20 can be matched with the corresponding cambered surface positioning grooves 31, and a part of the power wire core 20 is embedded into the soft tightening strip 30, so that the power wire core 20 is prevented from unnecessarily rolling and sliding.

In order to further enhance the anti-interference effect of the cable, a shielding layer 50 is sleeved between the compaction layer 40 and the contraction and extension layer 10, and the shielding layer 50 is woven by annealed copper wires or tinned copper wires with the diameter of 0.4-0.5 mm. The shielding layer 50 woven by adopting 0.4-0.5mm annealed copper wires or tinned copper wires is soft and convenient to bend.

Example 2

Referring to fig. 3 on the basis of embodiment 1, this embodiment provides an anti-interference variable frequency cable, which is an improvement of embodiment 1, and the difference is that:

cable core overcoat is equipped with crowded tight layer 40, and cable core includes three power sinle silk 20 and three neutral sinle silk 21, and three power sinle silk 20 are worked out with the twist form and are formed to with crowded tight 40 inner walls on layer, 40 inside walls on crowded tight layer become the heliciform and evenly open have with three neutral sinle silk 21's lateral wall matched with holding tank 41. Through weaving three power sinle silk 20 with the twist form, the degree of difficulty when making cable core buckle towards all directions all keeps unanimous, it is easy further to avoid taking place partial direction and buckle, the difficult condition of partial direction buckle, through setting up holding tank 41, fix three neutral sinle silks 21, and through setting up 41 heliciform holding tank, make neutral sinle silk 21 spiral distribution around three power sinle silks of twist form, thereby make the difficult degree of difficulty of buckling in the whole cable sinle silk all directions keep unanimously almost, with the bending in adaptation all directions.

To sum up, the utility model provides an anti-interference frequency conversion cable, it is through setting up the shrink extension layer to deal with the inconvenient condition of buckling in the cable use, through setting up the shrink extension layer into the form of shrink extension piece and setting element cross-connect, on the one hand through the shrink extension performance of shrink extension piece to crooked, the cable of buckling make adaptability cooperation, cooperation bending section shrink or extension, on the other hand, make the position of each section shrink extension piece relatively fixed in the length direction of cable through the setting element, prevent that shrink extension piece shrink or the in-process from sliding along the cable or piling up in one place; the telescopic extension piece is set to be a telescopic joint, so that the contraction characteristic and the extension characteristic are met, specifically, the positioning piece is in a sleeve shape, the inner side wall of the positioning piece is connected with the cable core, the positioning piece and the cable core are relatively fixed, on the basis, two ends of the telescopic extension piece (the telescopic joint) are respectively connected with the positioning piece, two ends of the telescopic extension piece and the cable core are relatively fixed, and only when the cable core at the position corresponding to the telescopic extension piece is bent, the telescopic extension piece can make corresponding contraction and extension matching; the power wire cores and the central wire cores are arranged in the regular triangle manner, so that the bending difficulty of the cable wire cores can be in a similar state when bending occurs in each direction, and the situations that part of the directions are easy to bend and part of the directions are extremely difficult to bend can be avoided; the three power wire cores are tightly squeezed by arranging the squeezing strip and the squeezing layer to enable the squeezing strip and the squeezing layer to be matched internally and externally, so that the anti-vibration and anti-squeezing performance is improved, meanwhile, the power wire cores are prevented from rolling and rotating in the sleeve layer, and the power wire cores are prevented from slipping and twisting off in the using process; by arranging the cambered surface positioning groove, a part of the power wire core is embedded into the soft tightening strip, so that the power wire core is prevented from rolling and sliding unnecessarily; through weaving three power sinle silks with the twist form, the degree of difficulty when making cable core buckle towards all directions all keeps unanimous, it is easy further to avoid taking place partial direction and buckle, the difficult condition of partial direction buckle, through setting up the holding tank, fix three neutral sinle silks, and through setting up the holding tank heliciform, make neutral sinle silks distribute around three power sinle silks of twist form, thereby make the difficult degree of difficulty of buckling in the whole cable core all directions keep unanimous almost, in order to adapt to the ascending bending of all directions.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (7)

1. The utility model provides an anti-interference frequency conversion cable, includes cable core, its characterized in that, the cable core overcoat is equipped with shrink extension layer (10), and shrink extension layer (10) are including a plurality of shrink extension pieces (11) of evenly arranging along cable length direction to and locating piece (12) of connecting between adjacent shrink extension piece (11).

2. The anti-interference frequency conversion cable according to claim 1, wherein the retractable and extendable members (11) are telescopic joints, two ends of the retractable and extendable members (11) are respectively connected with adjacent positioning members (12), and the inner side walls of the positioning members (12) are connected with cable cores.

3. The anti-interference frequency conversion cable according to claim 1, wherein the cable cores comprise three power cores (20) and three neutral cores (21), the three power cores (20) are erected in a regular triangle, the three neutral cores (21) are arranged in a regular triangle, and the side wall of any one neutral core (21) is in contact with the side walls of any two power cores (20) respectively.

4. The anti-interference frequency conversion cable according to claim 3, wherein a soft tightening strip (30) is arranged in a cavity surrounded by the three power wire cores (20), and a tightening layer (40) is sleeved between the cable wire cores and the contraction and extension layer.

5. The anti-interference frequency conversion cable according to claim 4, wherein the side wall of the soft tightening strip (30) is provided with three cambered surface positioning grooves (31) matched with the outer side wall of the power wire core (20).

6. The anti-interference variable frequency cable according to claim 4, wherein a shielding layer (50) is sleeved between the compaction layer (40) and the contraction and extension layer (10), and the shielding layer (50) is woven by annealed copper wires or tinned copper wires with the diameter of 0.4-0.5 mm.

7. The anti-interference frequency conversion cable according to claim 1, wherein the cable core is externally sleeved with a tight extrusion layer (40), the cable core comprises three power cores (20) and three neutral cores (21), the three power cores (20) are woven in a twisted shape and are tightly extruded with the inner wall of the tight extrusion layer (40), and the inner side wall of the tight extrusion layer (40) is spirally and uniformly provided with an accommodating groove (41) matched with the outer side wall of the three neutral cores (21).

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