CN104852163A - Assembly type cable connector - Google Patents
Assembly type cable connector Download PDFInfo
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- CN104852163A CN104852163A CN201510279420.2A CN201510279420A CN104852163A CN 104852163 A CN104852163 A CN 104852163A CN 201510279420 A CN201510279420 A CN 201510279420A CN 104852163 A CN104852163 A CN 104852163A
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- Prior art keywords
- collar
- sleeve pipe
- cable
- end cap
- conical surface
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/28—Clamped connections, spring connections
- H01R4/38—Clamped connections, spring connections utilising a clamping member acted on by screw or nut
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/28—Clamped connections, spring connections
- H01R4/38—Clamped connections, spring connections utilising a clamping member acted on by screw or nut
- H01R4/42—Clamping area to one side of screw only
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- Details Of Connecting Devices For Male And Female Coupling (AREA)
- Laying Of Electric Cables Or Lines Outside (AREA)
Abstract
The invention provides an assembly type cable connector which comprises a sleeve pipe, ringers 1, ball retaining plugs, ringers 2, a sleeve tube and clamp assemblies. The early tightening of a cable is carried out by the ball retaining plugs, then through the taper differences between the taper holes and end cap taper surfaces on the ringers, radial inward action forces are formed to the end ports of end caps by the ringers in the tightening process to overcome the external expansion of the end cap end ports, the second tightening is realized, the reliability of cable connection is increased, and the middle part of a cable connection section is tightened by using the clamp assemblies. Wedge clamping action, auxiliary secondary pressing shrinkage deformation and the middle defining action of the clamp assemblies are used, the small deformation amount of the cable can be ensured while the long-term stable and firm connection of the cable is realized, and reliable and stable power transmission performance of a cable connection part is ensured. The secondary faults of press contact point overheating, flashover and grounding caused by the poor connection of a service line can be effectively prevented, and technical support is provided for the reliable power supply and excellent server of a power supply enterprise.
Description
Technical field
The present invention relates to electric power system low-voltage distribution facility field, specifically a kind of electrical connector connected for low pressure service conductor cable.
Background technology
Low-voltage distributing line, be mainly used in directly distributing the electric energy of power consumption equipment, its circuit mainly realizes the connection of 10kV transformer platform, box type transformer and low-voltage customer power consumption equipment, completes power distribution.Generally speaking, service conductor refers to one section of circuit in overhead distribution and User support thing between the first support point.Low pressure service conductor refers to by 0.4kV and following low-voltage power line thereof one section of circuit to user first holder.In 380V/220V low-voltage distribution system, the electric power meter case be installed in residential quarter is the final equipment realizing power distribution.
In electric power system fault reports for repairment, the electric power meter case burnout phenomenon caused because of reasons such as Electricity customers overload electricity consumption or public system zero-line failures happens occasionally.Current processing method changes the electrical energy metering tank of fault.Its routine operation program first the low pressure public domain belonging to fault electrical energy metering tank is had a power failure, and the electrical energy metering tank of pending fault power transmission step by step again after changing, finally restores electricity.In view of this way can cause large-scale power delivery termination, cause larger negative effect to the good service of power supply enterprise.In order to shorten the power failure range processing above-mentioned fault, current maintainer can select line disconnection on the correct position of client's service conductor, only has a power failure to the electrical energy metering tank broken down.The breakpoint joint that low pressure service conductor cable connecting device carries out service conductor is re-used after pending fault device processes.
The low pressure service conductor cable connecting device (forcipressure connected mode) of current use as shown in Figure 1, its agent structure realizing connecting is a sleeve pipe 1, the cable 10 of connection is each passed through sleeve pipe 1 tube chamber and after guaranteeing that the termination of cable 10 reserves about 2cm length, by a kind of special vice, pressure is applied to the outer wall of sleeve pipe 1, sleeve pipe 1 outer wall indent is made by the detent projection on jaw, the final multiple grooves forming interruption, correspond to the groove location at crimping point place, cable bend forms compartment groove, and mutually chimeric with sleeve pipe 1.In order to ensure reliability, the stability of the transmission performance at tie point place, the flexural deformation of cable should not be made excessive.For guaranteeing that junction closely cooperates in forcipressure connected mode, crimping point groove needs to ask to have enough degree of depth, therefore the cable adopting described mode to connect easily occurs that at tie point place crimping is not tight, relatively deformation position is not had when indent is crossed dark, cable is obviously deteriorated at the transmission performance of groove, transmission of electricity physical performance index deposits difference at each groove contact, and very unstable, therefore overheated, the secondary fault of tie point repeatedly goes wrong and happens occasionally.
Except employing said apparatus, inspection personnel also can adopt " connection of single cord winding method ", " connection of the stranded conductor method of plant propagation with cutting ", " special-shaped and hook wire clamp connect ", " aluminium hook wire clamp connect ", the various ways such as " penetrating cable clamp connection ", the electrical energy metering tank broken down is accessed electrical network again, restores electricity., easily there is problems such as crimping loosely, fault point is overheated, fault occurs repeatedly, be specially in this described several cable connected mode: the winding of (1) wire, grafting etc. are connected mode directly, requires that wire winding must closely, neatly in operation; Stranded conductor adopt grafting time each stock connect stubble should on the same plane of wire; The resistance of joint should be not more than the wiring standard such as 90% of traverse calculation pull-off force; (2) use also hook wire clamp, penetrating cable clamp connected mode, require that service precision is not less than the vernier caliper measurement of 0.1mm in operation; The overlap occurred after crimping, burr and surface damage are answered filing and are used coated abrasive working; In wire clamp crimping lead wire must arrange closely, neat; After crimping, wire clamp flexibility must not be greater than 2% connection standard such as wire clamp such as grade.In view of strict connection request, be subject to the impact of the external factor such as weather, temperature, illumination, fault handling time sigma compactness in practical operation, service conductor cable connects and very easily occurs that winding is unreal, connects the problems such as stubble is nonstandard, crimping is not tight.
Summary of the invention
The deficiency existed in connection procedure is realized for the low pressure service conductor cable connecting device adopted at present, the invention provides a kind of Assembled junction cable connector, it is simple to operate, can guarantee to cause little deflection to cable while realization firmly connects, ensure reliability, the stability of cable connection transmission performance.
The present invention solves the technical scheme that its technical problem takes: a kind of Assembled junction cable connector, comprises sleeve pipe, the collar one, plug pin, the collar two, sleeve and clamp assembly.
The two ends of described sleeve pipe arrange axially extended end cap respectively.
In the middle part of the sidewall of described sleeve pipe, arrange strip groove opposing upper and lower, the bearing of trend of strip groove is axially.
The outside wall surface of described end cap is divided into two sections, and one section is conical surface in the outer part, and one section, inner side is Cylinder Surface, and the external diameter of conical surface is outer little greatly interior, and the diameter of Cylinder Surface is not less than conical surface the inner place maximum gauge.
The die cavity of described sleeve pipe and two ends end cap thereof is the rectangular body cavity of integral type.
The described collar one is two, coordinates respectively with the end cap at described sleeve pipe two ends.
The axial hole of the described collar one is divided into two sections, and one section is bellmouth, and another section is cylindrical hole, and the internal diameter of bellmouth part is outer little greatly interior, and cylindrical hole is connected with described end cap outside wall surface Cylinder Surface partial threads.
The half-angle of projection θ degree larger than the half-angle of projection of described end cap conical surface of the described collar one bellmouth, the interval of θ is 0.25 degree to 1 degree.
The axial length of the described collar one bellmouth is not less than the axial length of described end cap conical surface.
The outer wall of the described collar one arranges in its cylinder nose end the collar flange one extended radially outwardly, and establish external screw thread on the periphery wall of described collar flange one.
Described plug pin number is eight, is assemblied in the rectangular body cavity corner location of described sleeve pipe respectively.
The rectangular triangular prism shape of described plug pin, its angled end-face is curved surface and is divided into two sections, 1/4 Cylinder Surface and 1/4 conical surface is followed successively by and 1/4 conical surface radial dimension is inner small and outside big to the other end from one end, the axial length of 1/4 Cylinder Surface is less than the axial length of 1/4 conical surface, and the radial dimension of 1/4 Cylinder Surface is consistent with the radial dimension of 1/4 conical surface the inner.
In practical operation, be first passed from the rectangular body cavity of sleeve pipe respectively at the two ends of cable to be connected, the surplus length of stretching out of cable knob is the same with current connection request; Then the outer end of 1/4 conical surface section of plug pin is made to correspond to end cap port, right-angle surface contacts with the rectangular body cavity of sleeve pipe, and plug pin is inserted in the inner chamber of sleeve pipe, along with the spacing of the relative cable outer wall of inwall of the increase plug pin 1/4 conical surface section of intubating length reduces gradually, finally clamping force is formed to cable, continue through external force and be constantly pressed into plug pin, finally make 1/4 Cylinder Surface section of plug pin form compressed position to cable.
The number of the described collar two is two, coordinates respectively with the described collar one; The described collar two establishes axially extending bore and counterbore is established in one end of this axially extending bore, and the hole wall of axially extending bore and counterbore arranges internal thread respectively; Axially extending bore is threaded with the collar flange one of the described collar one.
The two ends outer wall of described sleeve arranges external screw thread, and medium position arranges radial direction through hole opposing upper and lower;
Described clamp assembly, by two groups, comprises fixture block and bolt respectively.
Column-shaped boss is set in the upper surface of described fixture block and axis along this column-shaped boss arranges tapped blind hole; The lower surface of described fixture block is set to arc-shaped concave; The external diameter of described column-shaped boss is consistent with the groove width of strip groove on described sleeve pipe, plays positioning action, for assembling is provided convenience; The width that described fixture block is positioned at its column-shaped boss lower part is not more than the groove width of strip groove on sleeve pipe.
During assembling, make the clamp assembly described in two groups corresponding with the strip groove of described sleeve pipe respectively, the arc-shaped concave of fixture block lower surface is contacted with the periphery wall of cable, makes the end face of column-shaped boss on each fixture block extend on described sleeve pipe strip groove or make the end face of column-shaped boss on each fixture block concordant with strip groove outer end on described sleeve pipe; The outside that described jacket casing is placed in described sleeve pipe makes the through hole on sleeve corresponding with the axially middle part of strip groove on sleeve pipe, then makes the counterbore of described two collars two be threaded with the two ends of described sleeve; The through hole that bolt in clamp assembly described in two groups is each passed through on described sleeve coordinates with the tapped blind hole on corresponding fixture block.
Further, the arc-shaped concave of described fixture block lower surface is arranged axially extended rubber strip arcuately.
Further, the residual quantity θ value of the half-angle of projection of the relatively described end cap conical surface of the half-angle of projection of the described collar one bellmouth is 0.5 degree or 0.75 degree.The value of half-angle of projection residual quantity θ has larger impact to connection effect of the present invention, if the too small meeting of residual quantity causes assembling difficulty, otherwise residual quantity is crossed conference and is caused assembly connection insecure, so the ductility of manufacture metal material commonly used according to end cap and the axial length (axial dimension easily gets higher value) of rigidity and the collar one and end cap taper part thereof arrange above-mentioned two concrete numerical value, reduce difficulty of processing.
Be ensure the effect after connecting further in addition, the manufacture material of plug pin and the making material of end cap distinguished: make the manufacture material heat expansion of plug pin be greater than the making material heat expansion of end cap.The heat expansion character of self can be relied between different materials like this, makes the plug pin after connection and end cap rely on self heat expansion difference to form further closely pressing.
Further, the axial length of the described collar one bellmouth is greater than the axial length of described end cap conical surface.
Further, the axial length of described plug pin 1/4 Cylinder Surface section is 1/3 to 1/2 of its 1/4 conical surface section axial length.In addition, improving the connection effect between cable and plug pin interference fit face, 1/4 Cylinder Surface of described plug pin is established the annular helical teeth that the port direction towards 1/4 Cylinder Surface tilts.
Further, the radial collar flange two extended is set at the external port inner chamber of described collar bellmouth, after assembling need be met, makes the edge of described collar flange two be positioned at the inner side at described sleeve pipe rectangular body cavity width edge edge.
The invention has the beneficial effects as follows: in the design, first rely on plug pin to carry out initialization pretension to cable, namely at the end cap place of sleeve pipe, cable is pressed in rectangular body cavity.Because the same with existing sleeve pipe, involved casing pipe pipe thickness is substantially at about 2mm, so after being subject to the support force effect of plug pin, the weak location of port has certain outer swollen extension, easy appearance of long duration relaxes to the thrust of cable, now cable can make the tube chamber outwards movement of plug pin facing sleeve under axial force, and the compression constraint of plug pin to cable was lost efficacy.In order to ensure the reliability of the design, the collar one is provided with especially outside end cap, object is by the collar one: rely on the tapering official post between the collar one bellmouth and the end cap conical surface to obtain the collar one on the one hand and form radially inner active force to the port of end cap in screwing operations, overcome the outer swollen of end cap port, realize secondary pretension, which increase the actuating pressure between plug pin and cable, when further raising cable is by axial force, frictional force between cable and cable contact face and between cable and plug pin contact-making surface, ensure that the reliability that cable is connected, end cap port radial thickness is directly increased after the collar one is set on the other hand, so after applying for a long time, plug pin obviously can not be subject to the impact of end cap and the collar one fatigue of materials on the actuating pressure of cable at sleeve port place, obviously weaken compression effect.Particularly when making the bellmouth axial length of the collar one be greater than the conical surface axial length of end cap, can according to the external factor such as ambient temperature, humidity, illumination, wind climates of application and the difference of this internal factor of cable material, the axis controlling the relative end cap of the collar one screws degree (namely axially inside screw-in amount), what ensure connection reliability holds time length in reasonable time interval, guarantees the versatility of reliability and the design connected.
In a word, relatively existing low pressure service conductor cable connecting device, the design utilizes wedge shape snap action and auxiliary secondary to recover metamorphosis, can guarantee to cause less deflection to cable while realization firmly connects reliably and with long-term to cable, ensure the reliable, stable of the transmission performance of cable connection.The appearance of the secondary faults such as the crimping point effectively avoiding service conductor bad connection to cause is overheated, pollution flashover, ground connection.Technical support is provided to the power supply reliability of power supply enterprise and good service.
Accompanying drawing explanation
Fig. 1 is the view of the low pressure service conductor cable connecting device used at present;
Fig. 2 is the main TV structure schematic diagram of middle sleeve of the present invention, the collar one, plug pin assembling;
The left side that Fig. 3 is middle sleeve of the present invention, the collar one, plug pin assemble is depending on partly cuing open structural representation;
Fig. 4 is the structural representation of plug pin in the present invention, and wherein (4-1) is front view, and (4-2) is left view;
Fig. 5 is a kind of structural representation of the collar one in the present invention, and wherein (5-1) is left view, and (5-2) is main pseudosection;
Fig. 6 is the structural representation of middle sleeve of the present invention, and wherein (6-1) is main pseudosection, and (6-2) is vertical view, (6-3) be along A-A in (6-1) to left pseudosection;
Fig. 7 is the collar one and the schematic diagram of sleeve pipe end cap in confined state in the present invention;
Fig. 8 is assembly structure schematic diagram of the present invention;
Fig. 9 is the dispersed structure schematic diagram of middle sleeve of the present invention, the collar one, the collar two, plug pin each parts under state to be assembled;
Figure 10 is the structural representation of the collar two in the present invention, and wherein (10-1) is main pseudosection, and (10-2) is left view;
Figure 11 is the structural representation of clamp assembly in the present invention, and wherein (11-1) is main pseudosection, and (11-2) is vertical view, and (11-3) is left pseudosection;
Figure 12 is the structural representation of middle sleeve of the present invention, and wherein (12-1) is main pseudosection, and (12-2) is vertical view, (12-3) be along B-B in (12-1) to left pseudosection;
Figure 13 is a kind of structural representation of fixture block in clamp assembly of the present invention;
In figure: 1 sleeve pipe, 11 end caps, 12 strip grooves, 2 collars one, 21 bellmouths, 22 collar flange two, 23 collar flanges one, 3 plug pins, 31 1/4 Cylinder Surfaces, 32 1/4 conical surfaces, 4 collar two, 5 sleeves, 51 radial direction through hole, 6 clamp assemblies, 61 fixture blocks, 62 bolts, 63 arc-shaped concaves, 64 rubber strips, 10 cables.
Embodiment
For ease of understanding technology contents of the present invention, below constipation close drawings and the embodiments its technical scheme is described further.
A kind of Assembled junction cable connector of one as shown in Figures 2 to 7, comprises sleeve pipe 1, the collar 1, plug pin 3, the collar 24, sleeve 5 and clamp assembly 6.
As shown in Fig. 2, Fig. 3, Fig. 6, the two ends of described sleeve pipe 1 arrange axially extended end cap 11 respectively.Described end cap 11 is preferably one-body molded with sleeve pipe 1 when making.The outside wall surface of described end cap 11 is divided into two sections, and one section is conical surface in the outer part, and one section, inner side is Cylinder Surface (establishing external screw thread), and the external diameter of conical surface is outer little greatly interior, and the diameter of Cylinder Surface equals conical surface the inner place maximum gauge.The die cavity of described sleeve pipe 1 and two ends end cap 11 thereof is the rectangular body cavity of integral type.In the middle part of the sidewall of described sleeve pipe 1, arrange strip groove 12 opposing upper and lower, the bearing of trend of strip groove 12 is axially.As shown in Figure 6, for ease of processing this strip groove 12, first on the periphery wall of sleeve pipe 1, Milling Process has gone out a plane.
As shown in Fig. 2, Fig. 3, Fig. 5, the described collar 1 is two, coordinates respectively with the end cap 11 at described sleeve pipe 1 two ends.The axial hole of the described collar 1 is divided into two sections, and one section is bellmouth, and another section is cylindrical hole (establishing internal thread), and the internal diameter of bellmouth part is outer little greatly interior, and cylindrical hole is connected with described end cap 11 outside wall surface Cylinder Surface partial threads.The outer wall of the described collar 1 arranges in its cylinder nose end the collar flange 1 extended radially outwardly, and establish external screw thread on the periphery wall of described collar flange 1.The wherein collar 2 shown in Fig. 5 relatively of the collar 2 shown in Fig. 2, Fig. 3, be provided with a radial collar flange 2 22 extended in the external port inner chamber place of the described collar 2 bellmouth 21 more, effect plug pin 3 being formed to axial limiting is played in the effect of this collar flange 2 22, stop plug pin 3 moving axially in the course of the work by External Force Acting, which further enhances fastness and the reliability of the connection of this coupling assembling.
As shown in Figure 7, the half-angle of projection θ degree larger than the half-angle of projection of described end cap 11 conical surface of the described collar 1 bellmouth, the interval of θ is 0.25 degree to 1 degree.The axial length of the described collar 1 bellmouth is greater than the axial length of described end cap 11 conical surface.The concrete value of θ is determined according to the size of the value of the end cap 11 conical surface axial length of the collar 1 bellmouth axial length and correspondence, axial length is longer, then the value at θ angle more gets the numerical value near interval upper range, otherwise when axial length is less, the value at θ angle also gets the numerical value near interval limit scope as far as possible.As the axial length value 1cm of end cap 11 conical surface as described in making, when making the axial length value 1.5cm of the described collar 1 bellmouth, θ value can be 0.6 degree or 0.75 degree.As the axial length value 1cm of end cap 11 conical surface as described in making, when making the axial length value 1.3cm of the described collar 1 bellmouth, θ value can be 0.45 degree or 0.55 degree.
Described plug pin 3 number is eight.As shown in Figure 3, Figure 4, the rectangular body cavity corner location of described sleeve pipe 1 is assemblied in respectively.Described plug pin 3 is triangular prism shape at right angles, its angled end-face is curved surface and is divided into two sections, be followed successively by 1/4 Cylinder Surface 31 and 1/4 from one end to the other end and bore round surface 32 and 1/4 conical surface 32 radial dimension is inner small and outside big, the axial length of 1/4 Cylinder Surface 31 is less than the axial length of 1/4 conical surface 32, and the radial dimension of 1/4 Cylinder Surface 31 is consistent with the radial dimension of 1/4 conical surface 32 the inner.The axial length of described plug pin 1/4 Cylinder Surface 31 sections is 1/3 to 1/2 of its 1/4 conical surface 32 sections of axial lengths.As shown in Fig. 3, Fig. 4, the position that the inclined-plane curved surface of described plug pin 3 and two right-angle surface planes join respectively, all have certain thickness, the end face that crosses forms a plane.It is pointed out that the material hardness of plug pin 3 should be less than the hardness of cable metal wire, the elastomeric material of hard preferably selected by the making material of plug pin 3.Be ensure the effect after connecting further in addition, can distinguish the making material of the making material of plug pin 3 and end cap 11 (to make material consistent with sleeve pipe 1 and the collar 1), even if the heat expansion of plug pin 3 is greater than the heat expansion of end cap 11, the character of material self can be relied on like this, make the plug pin after connection 3 and end cap 11 rely on self heat expansion difference to form tight pressing.Such as plug pin 3 adopts aluminium material, and end cap 11 adopts copper material.Carry out distinguishing rear (the two still guarantees to adopt the interference fit form with certain magnitude of interference) to the material of plug pin 3 and end cap 11, also help the not enough problem of crimp force overcoming assembling magnitude of interference deficiency and cause, greatly eliminate because add assembling and certainly exist insecure, the insecure probability of connection (namely connections can not be reached expect duration time, be considered as the Joint failure rate under connection failure prerequisite), can promote that the present invention's design is connected firmly, reliably success (expection reaching connection maintains duration) probability further.
Specific to plug pin 3 the concrete size of each several part, specifically should determine according to the rectangular body cavity size of cable 10 wire diameter size and sleeve pipe 1, ensure when arranging in a word that the Interference size of the relative cable 10 of conical surface (1/4 conical surface 32) the inner size of plug pin 3 and cuboid cavity gap is in 0.2mm to 0.6mm scope, guarantees that plug pin 3 forms enough pressuring actions to cable 10 while wedging rectangular body cavity and cable 10 gap smoothly as far as possible.Before described plug pin 3 is wedged, first its 1/4 Cylinder Surface 31 part steel brush is cleaned, make surface form matsurface, or the annular helical teeth establishing the port direction towards 1/4 Cylinder Surface to tilt on 1/4 Cylinder Surface of described plug pin 3.When wedging, circular slanting tooth forms comparatively slight drag, and when plug pin 3 outwards moves axially cable 10 relatively, annular helical teeth can form larger resistance, ensures to make it get loose easily to the connection effect of cable 10.
As shown in Fig. 8 to Figure 10, the number of the described collar 24 is two, coordinates respectively with the described collar 1.The described collar 24 establishes axially extending bore and counterbore is established in one end of this axially extending bore, and the hole wall of axially extending bore and counterbore arranges internal thread respectively.Axially extending bore is threaded with the collar flange 1 of the described collar 1.
As shown in Fig. 8, Fig. 9 and Figure 12, the two ends outer wall of described sleeve 5 arranges external screw thread, medium position arranges radial direction through hole 51 opposing upper and lower.
As shown in Fig. 8, Fig. 9 and Figure 11, described clamp assembly 6 has two groups, comprises fixture block 61 and bolt 62 respectively.Column-shaped boss is set in the upper surface of described fixture block 61 and axis along this column-shaped boss arranges tapped blind hole.The lower surface of described fixture block 61 is set to arc-shaped concave 63.Make the external diameter of described column-shaped boss consistent with the groove width of strip groove 12 on described sleeve pipe 1, the width that described fixture block 61 is positioned at its column-shaped boss lower part is not more than the groove width of strip groove 12 on sleeve pipe 1.Axis (after the assembling facing sleeve 1) length of fixture block 61 gets higher value as far as possible, preferably make it consistent with the axial length of strip groove 12, to ensure that fixture block 61 can form larger axis with cable 10 and contact, improve conduction, transmission performance that cable connects.As shown in figure 13, the arc-shaped concave of described fixture block 61 lower surface arranges three axially extended rubber strips 64 of the arc along this arc-shaped concave.As figure makes this three slat gums bar 64 with arc center for datum level is uniform.Like this, after fixture block 61 pairs of cables 10 apply pressure, increase the friction between fixture block 61 lower end and cable 10, axis therebetween (relative cable 10) resistance is increased, ensure that connection effect.
As shown in Figure 8, Figure 9, during assembling, make the clamp assembly 6 described in two groups corresponding with the strip groove 12 of described sleeve pipe 1 respectively, the arc-shaped concave 63 of fixture block 61 lower surface is contacted with the periphery wall of cable 10 (being partially submerged in the circular groove that arc-shaped concave 63 formed and cable 10 outer wall being contacted completely with the curved surface of arc-shaped concave 63 of cable 10), the end face of column-shaped boss on each fixture block 61 is made to extend on described sleeve pipe 1 strip groove 12 or make the end face of column-shaped boss on each fixture block 61 concordant with strip groove 12 outer end on described sleeve pipe 1, so that erection.The outside that described sleeve 5 is placed on described sleeve pipe 1 makes the radial direction through hole 51 on sleeve 5 corresponding with the axially middle part of strip groove 12 on sleeve pipe 1, then makes the counterbore of described two collars 24 be threaded with the two ends of described sleeve 5.The radial direction through hole 51 finally making the bolt 62 in the clamp assembly 6 described in two groups be each passed through on described sleeve 5 coordinates with the tapped blind hole on corresponding fixture block 61, along with bolt 62 is constantly screwed into the tapped blind hole on fixture block 61, the most described fixture block 61 is fixed on sleeve 5 and along with being screwed into further and makes fixture block 61 pairs of cables 10 form radial effect pressure.
Because strip groove 12 is fixing on sleeve pipe 1, so limit with the middle part of described clamp assembly 6 pairs of cables 10 to realize, consider assembly technology simultaneously, the present invention adopts described sleeve 5 to form the middleware of support and connection, and by the collar 24, sleeve 4 and sleeve pipe 1 are connected as one, ensure that in the structure of design and rotate centered by the axis of sleeve 5 not in order to sleeve pipe 1, rely on the collar 24 to rotate and realize annexation.
In practical operation, before cable 10 is inserted in sleeve pipe 1, first the connecting portion contact-making surface finer wire brush of two cables 10 to be connected is removed surface film oxide, be then coated with one deck electric power composite electric fat, ensure the conduction physical property of cable 10 after connecting.Then passed from the rectangular body cavity of sleeve pipe 1 respectively at the two ends of cable 10 to be connected, the surplus length of stretching out of cable 10 termination is the same with current connection request again.The outer end of 1/4 conical surface section of plug pin 3 is subsequently made to correspond to end cap 11 port, right-angle surface contacts with the rectangular body cavity right-angle surface of sleeve pipe 1, and plug pin 3 is inserted in the inner chamber of sleeve pipe 1, along with the spacing of inwall relative cable 10 outer wall of 1/4 conical surface section of the increase plug pin 3 of intubating length reduces gradually, finally clamping force is formed to cable 10, continue through external force and be constantly pressed into plug pin 3, finally make 1/4 Cylinder Surface section of plug pin 3 form the position of compressing to cable 10.The red insulating tape of the outer colligation of linkage unit formed at sleeve pipe 1 and the collar 1 after connection is marked, so that when tour at night, thermometric as emphasis.
The invention has the beneficial effects as follows: in the design, first rely on plug pin 3 pairs of cables 10 to carry out initialization pretension, namely at end cap 11 place of sleeve pipe 1, cable 10 is pressed in rectangular body cavity.Because the same with existing sleeve pipe, involved sleeve pipe 1 body pipe thickness is substantially at about 2mm, so after being subject to the support force effect of plug pin 3, the weak location of port has certain outer swollen extension, easy appearance of long duration relaxes to the thrust of cable 10, now cable 10 can make the tube chamber outwards movement of plug pin 3 facing sleeve 1 under axial force, the compression constraint of plug pin 3 pairs of cables 10 is reduced, so that lost efficacy.In order to ensure the reliability of the design, the collar 1 is provided with especially outside end cap 11, object is that rely on the tapering official post between the collar 1 bellmouth and end cap 11 conical surface to obtain the collar 1 by the collar 1 aspect forms radially inner active force to the port of end cap 11 in screwing operations, overcome the outer swollen of end cap 11 port, realize secondary pretension, which increase the actuating pressure between plug pin 3 and cable 10, when further raising cable 10 is by axial force, frictional force between cable 10 and cable 10 contact-making surface and between cable 10 and plug pin 3 contact-making surface, ensure that the reliability that cable 10 is connected, end cap 11 port radial thickness is directly increased after the collar 1 is set on the other hand, so after applying for a long time, plug pin 3 obviously can not be subject to the impact of end cap 11 and the collar 1 fatigue of materials on the actuating pressure of cable 10 in sleeve pipe 1 port, and obviously weaken compression effect.Particularly when making the bellmouth axial length of the collar 1 be greater than the conical surface axial length of end cap 11, can according to the external factor such as ambient temperature, humidity, illumination, wind climates of application and the difference of this internal factor of cable 10 material, the axis controlling the relative end cap 11 of the collar 1 screws degree (namely axially inside screw-in amount), what ensure connection reliability holds time length in reasonable time interval, guarantees the versatility of reliability and the design connected.As shown in Figure 2 and Figure 3, the radial collar flange 2 22 extended is set at the external port inner chamber of the described collar 2 bellmouth 21, after assembling, makes the edge of described collar flange 2 22 be positioned at lower end or upper end (namely inside the edge) at described sleeve pipe 1 rectangular body cavity width edge edge.When being filled in rectangular body cavity by plug pin 3, the end of plug pin 3 can be made to leak outside certain length, tighten the collar 2 on end cap 11 time, till when making the collar 2 be screwed to its collar flange 2 22 inwall and plug pin 3 end contact.Such collar 2 just can form axial location to plug pin 3, places and to produce axial outwards to move when it is subject to axial force relative to cuboid chamber, and snap action is weakened.
As shown in Fig. 8 to Figure 12, the basis of said modules and each self-structure thereof connects effect for ensureing, the collar 24, sleeve 6 and clamp assembly 6 are also set up, described sleeve 5 is relied on to form supporting construction, rely on the collar 24 that sleeve 5 and the collar 1 and sleeve pipe 1 are connected into a relatively-stationary entirety, then by the fixture block 61 in clamp assembly 6, the radial clamping force acted on up and down is formed to the cable 10 be in sleeve pipe 1 further.Like this relying on the collar 1 and plug pin 3 pairs of cables 10 while the two ends of sleeve pipe 1 form clamping action, at the middle part of sleeve pipe 1, clamping left and right is formed to cable 10 again.This adding structural also can not cause comparatively large deformation amount to cable 10 while realization further enhancing the fastness of connection, and is conducive to again the abundant contact of cable 10, improves conduction, the transmission performance of linkage section.
In a word, relatively existing low pressure service conductor cable connecting device, the design utilizes wedge shape snap action and auxiliary secondary to recover metamorphosis, can guarantee to cause less deflection to cable while realization firmly connects reliably and with long-term to cable, ensure the reliable, stable of the transmission performance of cable connection.The appearance of the secondary faults such as the crimping point effectively avoiding service conductor bad connection to cause is overheated, pollution flashover, ground connection.Technical support is provided to the power supply reliability of power supply enterprise and good service.
Except the technical characteristic described in specification, be the known technology of those skilled in the art.
Claims (8)
1. an Assembled junction cable connector, comprises sleeve pipe, it is characterized in that:
Also comprise the collar one, plug pin, the collar two, sleeve and clamp assembly;
The two ends of described sleeve pipe arrange axially extended end cap respectively;
In the middle part of the sidewall of described sleeve pipe, arrange strip groove opposing upper and lower, the bearing of trend of strip groove is axially;
The outside wall surface of described end cap is divided into two sections, and one section is conical surface in the outer part, and one section, inner side is Cylinder Surface, and the external diameter of conical surface is outer little greatly interior, and the diameter of Cylinder Surface is not less than conical surface the inner place maximum gauge;
The die cavity of described sleeve pipe and two ends end cap thereof is the rectangular body cavity of integral type;
The described collar one is two, coordinates respectively with the end cap at described sleeve pipe two ends;
The axial hole of the described collar one is divided into two sections, and one section is bellmouth, and another section is cylindrical hole, and the internal diameter of bellmouth part is outer little greatly interior, and cylindrical hole is connected with described end cap outside wall surface Cylinder Surface partial threads;
The half-angle of projection θ degree larger than the half-angle of projection of described end cap conical surface of the described collar one bellmouth, the interval of θ is 0.25 degree to 1 degree;
The axial length of the described collar one bellmouth is not less than the axial length of described end cap conical surface;
The outer wall of the described collar one arranges in its cylinder nose end the collar flange one extended radially outwardly, and establish external screw thread on the periphery wall of described collar flange one;
Described plug pin number is eight, is assemblied in the rectangular body cavity corner location of described sleeve pipe respectively;
The rectangular triangular prism shape of described plug pin, its angled end-face is curved surface and is divided into two sections, 1/4 Cylinder Surface and 1/4 conical surface is followed successively by and 1/4 conical surface radial dimension is inner small and outside big to the other end from one end, the axial length of 1/4 Cylinder Surface is less than the axial length of 1/4 conical surface, and the radial dimension of 1/4 Cylinder Surface is consistent with the radial dimension of 1/4 conical surface the inner;
The number of the described collar two is two, coordinates respectively with the described collar one;
The described collar two establishes axially extending bore and counterbore is established in one end of this axially extending bore, and the hole wall of axially extending bore and counterbore arranges internal thread respectively; Axially extending bore is threaded with the collar flange one of the described collar one;
The two ends outer wall of described sleeve arranges external screw thread, and medium position arranges radial direction through hole opposing upper and lower;
Described clamp assembly, by two groups, comprises fixture block and bolt respectively;
Column-shaped boss is set in the upper surface of described fixture block and axis along this column-shaped boss arranges tapped blind hole;
The lower surface of described fixture block is set to arc-shaped concave;
The external diameter of described column-shaped boss is consistent with the groove width of strip groove on described sleeve pipe, and the width that described fixture block is positioned at its column-shaped boss lower part is not more than the groove width of strip groove on sleeve pipe;
Make the clamp assembly described in two groups corresponding with the strip groove of described sleeve pipe respectively, the arc-shaped concave of fixture block lower surface is contacted with the periphery wall of cable, makes the end face of column-shaped boss on each fixture block extend on described sleeve pipe strip groove or make the end face of column-shaped boss on each fixture block concordant with strip groove outer end on described sleeve pipe;
The outside that described jacket casing is placed in described sleeve pipe makes the through hole on sleeve corresponding with the axially middle part of strip groove on sleeve pipe, then makes the counterbore of described two collars two be threaded with the two ends of described sleeve;
The through hole that bolt in clamp assembly described in two groups is each passed through on described sleeve coordinates with the tapped blind hole on corresponding fixture block.
2. a kind of Assembled junction cable connector according to claim 1, is characterized in that: on the arc-shaped concave of described fixture block lower surface, arrange axially extended rubber strip arcuately.
3. a kind of Assembled junction cable connector according to claim 1, is characterized in that: the residual quantity θ value of the half-angle of projection of the relatively described end cap conical surface of the half-angle of projection of the described collar one bellmouth is 0.5 degree or 0.75 degree.
4. a kind of Assembled junction cable connector according to any one of claim 1 to 3, is characterized in that: the heat expansion that described plug pin manufactures material is greater than the heat expansion that described end cap makes material.
5. a kind of Assembled junction cable connector according to claim 1 or 2 or 3, is characterized in that: the axial length of the described collar one bellmouth is greater than the axial length of described end cap conical surface.
6. a kind of Assembled junction cable connector according to claim 1 or 2 or 3, is characterized in that: the axial length of 1/4 Cylinder Surface section of described plug pin is 1/3 to 1/2 of its 1/4 conical surface section axial length.
7. a kind of Assembled junction cable connector according to claim 1 or 2 or 3, it is characterized in that: the radial collar flange two extended is set at the external port inner chamber of described collar bellmouth, after guaranteeing assembling, makes the edge of described collar flange two be positioned at the inner side at described sleeve pipe rectangular body cavity width edge edge.
8. a kind of Assembled junction cable connector according to claim 7, is characterized in that: the axial length of 1/4 Cylinder Surface section of described plug pin is 1/3 to 1/2 of its 1/4 conical surface section axial length; 1/4 Cylinder Surface of described plug pin is established the annular helical teeth that the port direction towards 1/4 Cylinder Surface tilts.
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| CN201510279420.2A CN104852163B (en) | 2015-05-27 | 2015-05-27 | A kind of Assembled junction cable connector |
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| CN104852163A true CN104852163A (en) | 2015-08-19 |
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