CN104852163B - A kind of Assembled junction cable connector - Google Patents

Abstract

An assembled cable connector, including a sleeve, a collar one, a plug pin, a collar two, a sleeve and a clamping assembly. The taper difference between the shaped hole and the tapered surface of the end cap makes the collar form a radially inward force on the port of the end cap during the tightening process to overcome the external expansion at the port of the end cap and achieve secondary preloading. To increase the reliability of the cable connection, the middle part of the cable connection section is clamped by means of the clamping component. It utilizes the wedge-shaped clamping effect, the auxiliary secondary compression shrinkage deformation and the middle limit function of the clamping component to achieve long-term reliable and firm connection to the cable while ensuring a small amount of deformation to the cable, ensuring that the cable Reliable and stable power transmission performance at the connection. It can effectively avoid secondary faults such as overheating of the crimping point, pollution flashover, and grounding caused by poor connection of the household line. Provide technical support for reliable power supply and high-quality service of power supply enterprises.

Description

An assembled cable connector

technical field

The invention relates to the field of low-voltage power distribution facilities of a power supply system, in particular to a connector device for connecting low-voltage household wires and cables.

Background technique

Low-voltage power distribution lines are mainly used to directly distribute electric energy to electrical equipment. The lines mainly realize the connection of 10kV transformers, box-type transformers and low-voltage user electrical equipment to complete power distribution. Generally speaking, the household line refers to a section of line between the overhead distribution line and the first support point in the user support. The low-voltage household line refers to a section of line from the low-voltage power line of 0.4kV and below to the first support of the user. In the 380V/220V low-voltage power distribution system, the electric energy metering device box installed in the residential area is the final equipment for realizing electric energy distribution.

In the repair of power system faults, the phenomenon of burning out of the electric energy metering device box due to the overload of electricity customers or the failure of the public neutral line often occurs. The current treatment method is to replace the faulty electric energy metering box. Its routine operation procedure is to cut off the power supply of the low-voltage public area to which the faulty electric energy metering box belongs, and then send power step by step after the faulty electric energy metering box is replaced, and finally restore the power supply. In view of the fact that this practice will cause large-scale power supply termination, it will have a relatively large negative impact on the high-quality services of power supply companies. In order to shorten the scope of power outages to deal with the above faults, maintenance personnel will choose to cut off the line at the appropriate position of the customer's household line, and only power off the faulty electric energy metering box. After the faulty equipment is dealt with, use the low-voltage household wire cable connection device to connect the breakpoint of the household wire.

The currently used low-voltage household line cable connection device (clamping method connection method) is shown in Figure 1. The main structure for realizing the connection is a sleeve 1, and the connected cables 10 are respectively passed through the tubes of the sleeve 1. cavity and ensure that the end of the cable 10 has a length of about 2cm, apply pressure to the outer wall of the sleeve 1 through a special pliers, and make the outer wall of the sleeve 1 concave with the help of the tooth-shaped protrusions on the jaws, finally forming a discontinuity A plurality of grooves correspond to the positions of the grooves at the crimping points, and the cables are bent to form spaced grooves to fit with the sleeve 1 . In order to ensure the reliability and stability of the power transmission performance at the connection point, the bending deformation of the cable should not be too large. In order to ensure the tight fit of the connection in the crimping connection method, the groove of the crimping point needs to have sufficient depth. Therefore, the cable connected by the above method is prone to crimping at the connection point. In the deformation position, the power transmission performance of the cable at the groove is obviously deteriorated, and the physical performance index of power transmission is different at the contact points of each groove, and it is very unstable. Therefore, overheating of the connection point and repeated secondary faults often occur.

In addition to the above-mentioned devices, inspectors will also use "single-strand wire winding method connection", "multi-strand wire plugging method connection", "special-shaped hook clip connection", "aluminum parallel hook clip connection", "puncture Connect the faulty electric energy metering box to the power grid again in various ways such as "clamp connection" to restore power supply. The above-mentioned cable connection methods are prone to problems such as poor crimping, overheating of fault points, and repeated faults. Specifically: (1) Direct connection methods such as wire winding and plugging require wire winding during operation. It must be tight and tidy; when multi-strand wires are plugged in, each strand should be on the same plane of the wire; the resistance at the joint should not be greater than 90% of the calculated breaking force of the wire and other wiring standards; (2) Use parallel hook clips , The connection method of the puncture wire clip requires the use of a vernier caliper with an accuracy of not less than 0.1mm to measure during operation; flashes, burrs, and surface damage that appear after crimping should be filed and polished with sandpaper; crimped wires in the clip must be arranged Tight and tidy; after crimping, the bending degree of the clamp shall not exceed 2% and other clamp connection standards. In view of the strict connection requirements, affected by external factors such as climate, temperature, lighting, and fault handling time in actual operation, it is very easy for the connection of the household cable to be untrue, non-standard splicing, and crimping not tight, etc. question.

Contents of the invention

Aiming at the deficiencies in the connection process of the currently used low-voltage household wire cable connection device, the present invention provides an assembled cable connector, which is easy to operate and can ensure a small damage to the cable while achieving a firm connection. The amount of deformation ensures the reliability and stability of the power transmission performance at the cable connection.

The technical solution adopted by the present invention to solve the technical problem is: an assembled cable connector, including a sleeve, a collar one, a plug pin, a collar two, a sleeve and a clamping assembly.

The two ends of the sleeve are respectively provided with axially extending end caps.

In the middle part of the side wall of the sleeve, vertically opposite strip-shaped through grooves are arranged, and the extending direction of the strip-shaped through grooves is the axial direction.

The outer wall surface of the end cap is divided into two sections, the outer section is a conical surface, and the inner section is a cylindrical surface, and the outer diameter of the conical surface is small on the outside and large on the inside, and the diameter of the cylindrical surface is not less than the maximum diameter at the inner end of the conical surface .

The mold cavities of the sleeve and the end caps at both ends are integrated cuboid cavities.

There are two collars, which are respectively matched with the end caps at both ends of the sleeve.

The axial hole of the collar one is divided into two sections, one section is a tapered hole, and the other section is a cylindrical hole, and the inner diameter of the tapered hole part is small on the outside and large on the inside, and the cylindrical hole and the cylindrical surface of the outer wall of the end cap Some threaded connections.

The conical half angle of a tapered hole of the collar is θ degrees larger than the conical half angle of the conical surface of the end cap, and the range of θ is 0.25° to 1°.

The axial length of a tapered hole of the collar is not less than the axial length of the conical surface of the end cap.

An annular flange 1 extending radially outward is provided on the outer wall of the collar 1 at the end of the cylindrical hole, and an external thread is provided on the outer peripheral wall of the annular flange 1 .

The number of the plug pins is eight, which are respectively assembled at the four corners of the cuboid cavity of the sleeve.

The plug pin is in the shape of a right-angled triangular prism, and its oblique end surface is a curved surface and is divided into two sections. From one end to the other end, it is a 1/4 cylindrical curved surface and a 1/4 conical curved surface, and the radial dimension of the 1/4 conical curved surface is within Small and large outside, the axial length of the 1/4 cylindrical curved surface is less than the axial length of the 1/4 conical curved surface, and the radial dimension of the 1/4 cylindrical curved surface is consistent with the radial dimension of the inner end of the 1/4 conical curved surface.

In actual operation, first pass the two ends of the cable to be connected through the cuboid cavity of the sleeve, and the protruding margin length of the cable end is the same as the current connection requirement; then make the 1/4 cone of the plug pin The outer end of the curved surface section corresponds to the port of the end cap, and the right-angled surface is in contact with the cuboid cavity of the sleeve, and the plug pin is inserted into the inner cavity of the sleeve tube. As the insertion length increases, the inner wall of the 1/4 conical surface section of the plug pin The distance between the outer walls of the cable gradually decreases, and finally a compressive force is formed on the cable, and the plug pin is continuously pressed in by external force, and finally the 1/4 cylindrical curved surface section of the plug pin forms a compressive position on the cable.

The number of the two collars is two, which are matched with the first collar respectively; the second collar is provided with an axial through hole and one end of the axial through hole is provided with a counterbore. Internal threads are respectively arranged on the hole walls of the holes; the axial through hole is threadedly connected with the annular flange of the collar one.

External threads are provided on the outer walls of both ends of the sleeve, and radial through holes opposite up and down are provided at the middle position;

The clamping assembly consists of two groups, including clamping blocks and bolts respectively.

A cylindrical boss is set on the upper end surface of the clamp block and a threaded blind hole is set along the axis of the cylindrical boss; the lower end surface of the clamp block is set as an arc-shaped concave surface; the outer diameter of the cylindrical boss It is consistent with the groove width of the strip-shaped groove on the casing to play a positioning role and provide convenience for assembly; the width of the clamping block located under the cylindrical boss is not greater than the width of the strip-shaped groove on the casing. Groove width.

When assembling, make the two sets of clamping components correspond to the strip-shaped through grooves of the sleeve respectively, make the arc-shaped concave surface of the lower end surface of the clamp block contact with the outer peripheral wall of the cable, and make the upper cylindrical convex of each clamp block The end surface of the platform extends out of the strip-shaped through groove on the sleeve or makes the end surface of the cylindrical boss on each clamp block flush with the outer end of the strip-shaped through-groove on the sleeve; the sleeve is placed on the The outside of the sleeve pipe makes the through hole on the sleeve correspond to the axial middle part of the strip-shaped through groove on the sleeve pipe, and then the counterbore of the two collars 2 is threadedly connected with the two ends of the sleeve; The bolts in the clamping assembly respectively pass through the through holes on the sleeve and cooperate with the threaded blind holes on the corresponding clamping block.

Further, a rubber strip extending along the arc-shaped axial direction is arranged on the arc-shaped concave surface of the lower end surface of the clamp block.

Further, the difference θ between the conical half angle of a tapered hole of the collar and the conical surface of the end cap is 0.5 degrees or 0.75 degrees. The value of the cone half-angle difference θ will have a greater impact on the connection effect of the present invention. If the difference is too small, it will cause assembly difficulties. Otherwise, if the difference is too large, the assembly connection will not be firm. The ductility and rigidity of the ring and the axial length of the tapered part of the end cap (the axial dimension is easy to take a larger value) set the above two specific values to reduce the difficulty of processing.

In addition, in order to further ensure the effect after connection, a distinction is made between the manufacturing material of the plug pin and the manufacturing material of the end cap: the thermal expansion of the manufacturing material of the plug pin is greater than that of the end cap. In this way, it is possible to rely on the thermal expansion properties of different materials, so that the connected plug pin and the end cap can form a further tight compression by relying on the difference in thermal expansion.

Further, the axial length of a tapered hole of the collar is greater than the axial length of the conical surface of the end cap.

Further, the axial length of the 1/4 cylindrical curved surface section of the plug pin is 1/3 to 1/2 of the axial length of the 1/4 conical curved surface section. In addition, to improve the connection effect between the cable and the interference fit surface of the plug pin, an annular helical tooth inclined toward the port of the 1/4 cylindrical surface is provided on the 1/4 cylindrical surface of the plug pin.

Further, a radially extending annular flange 2 is arranged in the inner cavity of the outer port of the tapered hole of the collar, so that after assembly, the edge of the annular flange 2 is located at the width edge of the cuboid cavity of the casing. inside.

The beneficial effect of the present invention is that: in this design, the cable is initially preloaded by means of the plug pin, that is, the cable is pressed tightly in the cavity of the cuboid at the end cap of the sleeve. Because it is the same as the existing casing, the wall thickness of the casing body involved is basically about 2mm, so after being supported by the plug pin, the weak position of the port will have a certain amount of external expansion and extension, and it is easy to appear after a long time. The compression force on the cable is relaxed, and at this time, the cable will move the plug pin outward relative to the lumen of the sleeve under the axial force, so that the compression constraint of the plug pin on the cable becomes invalid. In order to ensure the reliability of this design, a collar 1 is specially set outside the end cap, the purpose is to pass the collar 1: on the one hand, rely on the taper difference between the tapered hole of the collar 1 and the tapered surface of the end cap to make the collar 1 in the During the tightening process, a radially inward force is formed on the port of the end cap to overcome the external expansion at the port of the end cap and realize secondary pre-tightening, which increases the acting pressure between the plug pin and the cable and further improves When the cable is subjected to axial force, the friction force between the contact surface of the cable and the cable and between the contact surface of the cable and the plug ensures the reliability of the cable connection; The radial wall thickness at the port of the end cap is directly increased, so after a long period of application, the pressure exerted by the plug on the cable at the port of the bushing will not be significantly affected by the fatigue of the end cap and the collar material. Significantly reduces the compression effect. Especially when the axial length of the tapered hole of the collar 1 is greater than the axial length of the conical surface of the end cap, it can be adjusted according to the external factors such as ambient temperature, humidity, light, wind and climate of the application and the internal factors of the cable material. , to control the axial tightening degree of the relative end cap of the collar (that is, the amount of axial inward screwing), to ensure that the maintenance time of the connection reliability is within a reasonable time interval, to ensure the reliability of the connection and the universality of this design sex.

In short, compared with the existing low-voltage household line cable connection device, this design utilizes the wedge-shaped clamping effect and the auxiliary secondary recovery deformation effect, which can ensure a long-term reliable and firm connection to the cable while ensuring less damage to the cable. The amount of deformation ensures reliable and stable power transmission performance at the cable connection. It can effectively avoid secondary faults such as overheating of the crimping point, pollution flashover, and grounding caused by poor connection of the household line. It provides technical support for the power supply reliability and high-quality service of power supply enterprises.

Description of drawings

Fig. 1 is a schematic diagram of the state of the low-voltage household line cable connection device in use at present;

Fig. 2 is the schematic diagram of the front view of sleeve pipe, collar 1 and plug pin assembly in the present invention;

Fig. 3 is the left view half-section structure schematic diagram of sleeve pipe, collar one, plug pin assembly in the present invention;

Fig. 4 is the structural representation of plug pin among the present invention, and wherein (4-1) is main view, (4-2) is left view;

Fig. 5 is a kind of structural representation of collar one among the present invention, and wherein (5-1) is a left side view, (5-2) is a front sectional view;

Fig. 6 is a schematic structural view of the sleeve of the present invention, wherein (6-1) is a front sectional view, (6-2) is a top view, and (6-3) is a left view along the A-A direction in (6-1) section view;

Fig. 7 is a schematic diagram of the collar one and the sleeve end cap in the assembled state in the present invention;

Fig. 8 is a schematic diagram of the assembly structure of the present invention;

Fig. 9 is a schematic diagram of the scattered structure of the casing, the first collar, the second collar and the plug pin in the state to be assembled in the present invention;

Fig. 10 is a schematic structural view of collar two in the present invention, wherein (10-1) is a front view sectional view, and (10-2) is a left view;

Fig. 11 is a schematic structural view of the clamping assembly in the present invention, wherein (11-1) is a front sectional view, (11-2) is a top view, and (11-3) is a left sectional view;

Figure 12 is a schematic structural view of the sleeve of the present invention, wherein (12-1) is a front sectional view, (12-2) is a top view, and (12-3) is a left view along the B-B direction in (12-1) section view;

Fig. 13 is a schematic structural view of the clamping block in the clamping assembly of the present invention;

In the figure: 1 casing, 11 end cap, 12 strip-shaped through groove, 2 collar 1, 21 tapered hole, 22 annular flange 2, 23 annular flange 1, 3 plug pin, 31 1/4 cylinder Curved surface, 32 1/4 conical surface, 4 collar two, 5 sleeve, 51 radial through hole, 6 clamping assembly, 61 clamp block, 62 bolt, 63 arc concave surface, 64 rubber strip, 10 cable.

detailed description

In order to facilitate the understanding of the technical content of the present invention, the technical solutions thereof will be further described below in conjunction with the accompanying drawings and embodiments.

An assembled cable connector as shown in FIG. 2 to FIG. 7 includes a sleeve 1 , a first collar 2 , a plug pin 3 , a second collar 4 , a sleeve 5 and a clamping component 6 .

As shown in FIG. 2 , FIG. 3 , and FIG. 6 , axially extending end caps 11 are respectively provided at both ends of the sleeve 1 . The end cap 11 and the sleeve 1 are preferably integrally formed during manufacture. The outer wall of the end cap 11 is divided into two sections, one section on the outside is a conical surface, and the inner section is a cylindrical surface (with external thread), and the outer diameter of the conical surface is small on the outside and large on the inside, and the diameter of the cylindrical surface is equal to that of the conical surface. Maximum diameter at the inner end. The cavity of the sleeve 1 and the end caps 11 at both ends thereof is an integral cuboid cavity. In the middle part of the side wall of the casing 1, vertically opposite strip-shaped through-slots 12 are arranged, and the extending direction of the strip-shaped through-slots 12 is the axial direction. As shown in FIG. 6 , in order to facilitate the processing of the strip-shaped through groove 12 , a plane is first milled on the outer peripheral wall of the casing 1 .

As shown in FIG. 2 , FIG. 3 , and FIG. 5 , there are two collars 1 , which are respectively matched with the end caps 11 at both ends of the sleeve 1 . The axial hole of the collar-2 is divided into two sections, one section is a tapered hole, and the other section is a cylindrical hole (with internal thread), and the inner diameter of the tapered hole part is small on the outside and large on the inside. The cylindrical curved surface part of the outer wall of the end cap 11 is threaded. An annular flange 23 extending radially outward is provided on the outer wall of the collar 2 at the cylindrical hole end thereof, and an external thread is provided on the peripheral wall of the annular flange 23 . Among them, the collar 2 shown in Fig. 2 and Fig. 3 is compared with the collar 2 shown in Fig. 5, and a radially extending annular flange is provided at the inner cavity of the outer port of the tapered hole 21 of the collar 2. Two 22, the function of the annular flange two 22 is to play the role of axially limiting the plug pin 3, preventing the plug pin 3 from moving axially under the action of external force during the working process, which further strengthens the connection assembly The firmness and reliability of the connection.

As shown in FIG. 7 , the conical half-angle of the collar-2 tapered hole is θ degrees larger than the conical half-angle of the conical surface of the end cap 11 , and the range of θ is 0.25° to 1°. The axial length of the tapered hole of the collar-2 is greater than the axial length of the conical surface of the end cap 11 . The specific value of θ is determined according to the axial length of the tapered hole of the collar 12 and the value of the corresponding axial length of the conical surface of the end cap 11. The longer the axial length, the closer the value of the θ angle is to the upper limit of the interval. On the contrary, when the axial length is small, the value of θ angle should be as close to the lower limit of the interval as possible. If the axial length of the conical surface of the end cap 11 is 1 cm, and the axial length of the collar-2 tapered hole is 1.5 cm, the value of θ can be 0.6 degrees or 0.75 degrees. If the axial length of the conical surface of the end cap 11 is 1 cm, and the axial length of the collar-2 tapered hole is 1.3 cm, the value of θ can be 0.45 degrees or 0.55 degrees.

The number of said plug pins is eight. As shown in FIG. 3 and FIG. 4 , they are respectively assembled at the four corners of the cuboid cavity of the casing 1 . The plug pin 3 is in the shape of a right-angled triangular prism, and its inclined end surface is a curved surface and is divided into two sections. From one end to the other end, it is a 1/4 cylindrical surface 31 and a 1/4 conical surface 32 and a 1/4 conical surface. The radial dimension of 32 is small inside and large outside, the axial length of 1/4 cylindrical curved surface 31 is less than the axial length of 1/4 conical curved surface 32, the radial dimension of 1/4 cylindrical curved surface 31 is the same as the inner end of 1/4 conical curved surface 32 Consistent radial dimensions. The axial length of the 1/4 cylindrical curved surface 31 section of the plug pin is 1/3 to 1/2 of the axial length of the 1/4 conical curved surface 32 section. As shown in FIG. 3 and FIG. 4 , the places where the oblique curved surface of the plug pin 3 meets the two right-angled planes respectively have a certain thickness, and the converging end surfaces form a plane. It should be pointed out that the hardness of the material of the plug 3 should be less than that of the wire of the cable, and the material of the plug 3 should preferably be hard rubber. In addition, in order to further ensure the effect after connection, the production material of plug pin 3 and the production material of end cap 11 (consistent with the production material of sleeve pipe 1 and collar-2) can be distinguished, even if the thermal expansion of plug pin 3 is greater than The thermal expansion of the end cap 11 can rely on the properties of the material itself, so that the connected plug pin 3 and the end cap 11 can form a tight press fit depending on the difference in thermal expansion. For example, the plug pin 3 is made of aluminum, and the end cap 11 is made of copper. After distinguishing the materials of the plug pin 3 and the end cap 11 (the two still adopt the form of interference fit with a certain amount of interference), it is also beneficial to overcome the problem of insufficient crimping force caused by insufficient assembly interference, and greatly eliminates The probability of weak and unreliable connection that inevitably exists due to additional assembly (that is, when the connection cannot reach the expected duration, it is regarded as the connection failure rate under the premise of connection failure), can further improve the design of the present invention. Success (reaching the expected duration of the connection) probability.

The specific dimensions of each part of the plug pin 3 should be specifically determined according to the diameter of the cable 10 metal wire and the size of the cuboid cavity of the sleeve 1. In a word, try to ensure that the conical surface of the plug pin 3 (that is, 1/4 cone The interference dimension of the inner end of the curved surface 32) relative to the gap between the cable 10 and the cuboid cavity is in the range of 0.2 mm to 0.6 mm, ensuring that the plug pin 3 is smoothly wedged into the gap between the cuboid cavity and the cable 10 and at the same time forms a sufficient gap for the cable 10. Compression worked. Before the plug pin 3 is wedged, at first its 1/4 cylindrical curved surface 31 part is cleaned with a steel brush to form a rough surface on the surface, or the 1/4 cylindrical curved surface of the plug pin 3 is set toward 1 /4 A circular helical tooth with a slanted port direction on a cylindrical surface. When wedging, the annular helical teeth form a small resistance, and when the cable 10 moves axially outward relative to the plug pin 3, the annular helical teeth can form a large resistance to ensure the connection effect of the cable 10 so that it will not be easily loose.

As shown in FIG. 8 to FIG. 10 , the number of the second collar 4 is two, which are matched with the first collar 2 respectively. The collar two 4 is provided with an axial through hole and one end of the axial through hole is provided with a counterbore, and internal threads are respectively provided on the walls of the axial through hole and the counterbore. The axial through hole is threadedly connected with the annular flange-23 of the collar-2.

As shown in FIG. 8 , FIG. 9 and FIG. 12 , external threads are provided on the outer walls of both ends of the sleeve 5 , and radial through holes 51 opposite up and down are provided in the middle.

As shown in FIG. 8 , FIG. 9 and FIG. 11 , the clamping assembly 6 has two groups, including clamping blocks 61 and bolts 62 respectively. A cylindrical boss is arranged on the upper end surface of the clamp block 61 and a threaded blind hole is arranged along the axis of the cylindrical boss. The lower end surface of the clamping block 61 is set as an arc-shaped concave surface 63 . Make the outer diameter of the columnar boss consistent with the groove width of the strip-shaped through groove 12 on the sleeve 1, and the width of the clamp block 61 at the lower part of the column-shaped boss is not greater than the strip-shaped channel on the sleeve 1. The groove width of through groove 12. The axial length of the clamping block 61 (relative to the casing 1 after assembly) should be as large as possible, and it is best to make it consistent with the axial length of the strip-shaped through groove 12, so as to ensure that the clamping block 61 can form a joint with the cable 10. The larger axial contact improves the conductivity and power transmission performance of the cable connection. As shown in FIG. 13 , three rubber strips 64 extending axially along the arc of the arc concave surface are arranged on the arc concave surface of the lower end surface of the clamp block 61 . As shown in the figure, the three rubber strips 64 are evenly distributed with the center of the arc as the reference plane. In this way, when the clamp block 61 exerts pressure on the cable 10, the friction between the lower end of the clamp block 61 and the cable 10 is increased, so that the axial resistance (relative to the cable 10) between the two increases, The connection effect is guaranteed.

As shown in Fig. 8 and Fig. 9, when assembling, make the two sets of clamping assemblies 6 respectively correspond to the strip-shaped through grooves 12 of the sleeve 1, and make the arc-shaped concave surface 63 of the lower end surface of the clamp block 61 correspond to the line The outer peripheral wall of the cable 10 is in contact (the part of the cable 10 is embedded in the circular groove formed by the arc concave surface 63 and the outer wall of the cable 10 is fully contacted with the curved surface of the arc concave surface 63), so that each clamping block 61 is equipped with a cylindrical boss. The end surface extends out of the strip-shaped through groove 12 of the sleeve 1 or the end surface of the cylindrical boss on each clamping block 61 is flush with the outer end of the strip-shaped through groove 12 of the sleeve 1 to facilitate assembly and installation. The sleeve 5 is sleeved on the outside of the sleeve 1 so that the radial through hole 51 on the sleeve 5 corresponds to the axial middle part of the strip-shaped through groove 12 on the sleeve 1, and then the two collars are two The counterbore of 4 is threadedly connected with both ends of the sleeve 5 . Finally, the bolts 62 in the two groups of clamping assemblies 6 are respectively passed through the radial through holes 51 on the sleeve 5 to cooperate with the threaded blind holes on the corresponding clamping blocks 61, and as the bolts 62 are continuously screwed into the clamping The threaded blind hole on the block 61 finally fixes the clamp block 61 on the sleeve 5 and makes the clamp block 61 form radial pressure on the cable 10 as it is further screwed in.

Because the strip-shaped through groove 12 on the sleeve 1 is fixed, in order to be able to use the clamping assembly 6 to limit the middle part of the cable 10, and taking the assembly process into consideration, the present invention adopts the sleeve 5 to form a Support the middle piece of connection, and connect the sleeve 4 and the sleeve 1 as a whole through the collar 2 4. The designed structure ensures that the sleeve 5 does not rotate around the axis of the sleeve 1, but relies on the sleeve 2 4 to rotate Realize the connection relationship.

In actual operation, before inserting the cable 10 into the bushing 1, first use a fine steel wire brush to remove the surface oxide film on the contact surface of the connecting part of the two cables 10 to be connected, and then apply a layer of electric power composite power grease to ensure that the wire after connection Conductive physical properties of the cable 10. Then pass the two ends of the cable 10 to be connected through the cuboid body cavity of the sleeve 1 respectively, and the protruding margin length of the end of the cable 10 is the same as the current connection requirement. Then make the outer end of the 1/4 conical surface section of the plug pin 3 correspond to the port of the end cap 11, and the right-angled surface is in contact with the right-angled surface of the cuboid cavity of the sleeve pipe 1, and the plug pin 3 is inserted into the inner cavity of the sleeve pipe 1, and then As the insertion length increases, the distance between the inner wall of the 1/4 conical surface section of the plug pin 3 and the outer wall of the cable 10 gradually decreases, and finally a compressive force is formed on the cable 10, and the plug pin 3 is continuously pressed in by external force, and finally Make the 1/4 cylindrical surface section of the plug pin 3 form a compressed position for the cable 10 . After the connection is completed, bind a red insulating tape on the outer layer of the connection unit formed by the casing 1 and the collar 1 for marking, so as to be the key point during night patrol and temperature measurement.

The beneficial effects of the present invention are: in this design, the cable 10 is initially preloaded by means of the plug pin 3 , that is, the cable 10 is pressed tightly in the cavity of the cuboid at the end cap 11 of the sleeve 1 . Because it is the same as the existing casing, the wall thickness of the casing 1 involved is basically about 2mm, so after being supported by the plug 3, the weak position of the port will expand and extend to a certain extent, and after a long time The compression force on the cable 10 tends to be loose. At this time, the cable 10 will move the plug pin 3 outward relative to the lumen of the sleeve 1 under the axial force, so that the compression force of the plug pin 3 on the cable 10 Constraints are reduced so that they fail. In order to ensure the reliability of this design, a collar-2 is specially provided outside the end cap 11. The purpose is to rely on the taper difference between the collar-2 tapered hole and the tapered surface of the end cap 11 to make the During the tightening process, the collar-2 forms a radially inward force on the port of the end cap 11 to overcome the external expansion at the port of the end cap 11 and realize secondary pre-tightening, which increases the plug pin 3 and the cable. 10, to further improve the frictional force between the contact surface of the cable 10 and the cable 10 and between the contact surface of the cable 10 and the plug pin 3 when the cable 10 is subjected to an axial force, ensuring alignment The reliability of the connection of the cable 10; on the other hand, the radial wall thickness at the port of the end cap 11 is directly increased after the collar 1 is set, so after a long period of application, the plug pin 3 is at the port of the sleeve 1 to the cable. The applied pressure of 10 will not obviously be affected by the material fatigue of the end cap 11 and the collar-2, and the pressing effect will be obviously weakened. Especially when the axial length of the tapered hole of the collar one 2 is greater than the axial length of the conical surface of the end cap 11, the internal factors such as the ambient temperature, humidity, light, wind and climate of the application and the material of the cable 10 can be used. Different factors, control the axial tightening degree of the collar 12 relative to the end cap 11 (that is, the amount of axial inward screwing), to ensure that the maintenance time of the connection reliability is within a reasonable time interval, and ensure the reliability of the connection and the versatility of this design. As shown in Fig. 2 and Fig. 3, a radially extending annular flange 22 is arranged in the inner cavity of the outer port of the tapered hole 21 of the collar 2, and after assembly, the edge of the annular flange 22 is positioned at The lower end or the upper end (ie, the inner side of the edge) of the width edge of the cavity of the cuboid cavity of the sleeve 1 . When the plug pin 3 is inserted into the cuboid cavity, the end of the plug pin 3 can be leaked to a certain length, and when the collar 2 is tightened on the end cap 11, the collar 2 is tightened to its annular flange 222 When the inner wall is in contact with the end face of the plug pin 3. In this way, the collar 2 can form an axial positioning for the plug pin 3, and when it is placed under an axial force, it will move axially outward relative to the cavity of the cuboid, thereby weakening the clamping effect.

As shown in Figures 8 to 12, on the basis of the above components and their respective structures, in order to ensure the connection effect, a collar 2 4, a sleeve 6 and a clamping component 6 are added, and the support structure is formed by the sleeve 5 , the sleeve 5, the collar 2 and the bushing 1 are connected into a relatively fixed whole by means of the collar 2 4, and the cable 10 in the bushing 1 is further formed by means of the clamping block 61 in the clamping assembly 6 Radial clamping force acting up and down. In this way, while relying on the collar one 4 and the plug pin 3 to clamp the cable 10 at both ends of the sleeve 1, the cable 10 is clamped left and right in the middle of the sleeve 1. The additional structure further enhances the firmness of the connection, and at the same time does not cause a large amount of deformation to the cable 10, and is also conducive to the full contact of the cable 10, improving the electrical conduction and power transmission performance of the connecting section.

In short, compared with the existing low-voltage household line cable connection device, this design utilizes the wedge-shaped clamping effect and the auxiliary secondary recovery deformation effect, which can ensure a long-term reliable and firm connection to the cable while ensuring less damage to the cable. The amount of deformation ensures reliable and stable power transmission performance at the cable connection. It can effectively avoid secondary faults such as overheating of the crimping point, pollution flashover, and grounding caused by poor connection of the household line. It provides technical support for the power supply reliability and high-quality service of power supply enterprises.

Except for the technical features described in the instructions, all are known technologies by those skilled in the art.

Claims (8)

1. a kind of Assembled junction cable connector, including sleeve pipe, is characterized in that：

Also include the collar one, plug pin, the collar two, sleeve and clamp assembly；

The two ends of described sleeve pipe are respectively provided with axially extended end cap；

Strip groove opposing upper and lower is set in the middle part of the side wall of described sleeve pipe, and 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 of inner side is Cylinder Surface, and conic The external diameter in face is outer little interior big, and the diameter of Cylinder Surface is not less than maximum gauge at conical surface the inner；

The die cavity of described sleeve pipe and its two ends end cap is the rectangular body cavity of integral type；

The described collar one is two, coordinates with the end cap at described sleeve pipe two ends respectively；

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 For outer little interior big, cylindrical hole is connected with described end cap outside wall surface Cylinder Surface partial threads；

The half-angle of projection of the described collar one bellmouth big θ degree than the half-angle of projection of described end cap conical surface, 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 collar flange one extending radially outwardly in the setting of its cylinder nose end on the outer wall of the described collar one, and in described ring-type External screw thread is set on the periphery wall of 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, is followed successively by 1/4 circle from one end to the other end Curved surface of column and 1/4 conical surface and 1/4 conical surface radial dimension is inner small and outside big, the axial length of 1/4 Cylinder Surface is less than 1/4 The axial length of conical surface, the radial dimension of the 1/4 Cylinder Surface radial dimension inner with 1/4 conical surface is consistent；

The number of the described collar two is two, coordinates with the described collar one respectively；

The described collar two sets axially extending bore and one end of this axially extending bore sets counterbore, on the hole wall of axially extending bore and counterbore respectively Setting female thread；Axially extending bore is threadeded with the collar flange one of the described collar one；

External screw thread is arranged on the two ends outer wall of described sleeve, medium position arranges radial direction through hole opposing upper and lower；

Described clamp assembly, by two groups, includes fixture block and bolt respectively；

Column-shaped boss is set in the upper surface of described fixture block and the axis along this column-shaped boss is threaded 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 in described sleeve pipe, and described fixture block is located under its column-shaped boss Partial width 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, make the arc-shaped concave of fixture block lower surface with The periphery wall contact of cable, makes the end face of column-shaped boss on each fixture block extend in described sleeve pipe strip groove or make each fixture block The end face of upper column-shaped boss is concordant with strip groove outer end in described sleeve pipe；

The outside that described sleeve is placed on described sleeve pipe makes the through hole on sleeve corresponding with the axially middle part of strip groove on sleeve pipe, Then the counterbore making described two collars two is threadeded with the two ends of described sleeve；

The bolt in the clamp assembly described in two groups is made to be each passed through the through hole on described sleeve blind with the screw thread on corresponding fixture block Hole coordinates.

2. a kind of Assembled junction cable connector according to claim 1, is characterized in that：Arc in described fixture block lower surface Axially extended rubber strip arcuately is arranged on concave surface.

3. a kind of Assembled junction cable connector according to claim 1, is characterized in that：The circular cone of the described collar one bellmouth The residual quantity θ value of the half-angle of projection of the relatively described end cap conical surface of half-angle 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：Described plug pin system The flatulence of heat type of producing material matter is more than the flatulence of heat type 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 described collar one bellmouth Axial length be more than described end cap conical surface axial length.

6. a kind of Assembled junction cable connector according to claim 1 or 2 or 3, is characterized in that：1/4 circle of described plug pin The axial length of curved surface of column section is the 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, is characterized in that：In described collar bellmouth The external port inner chamber collar flange two that radially extends of setting it is ensured that make after assembling described collar flange two edge be located at described The inner side at sleeve pipe rectangular body cavity width edge edge.

8. a kind of Assembled junction cable connector according to claim 7, is characterized in that：1/4 Cylinder Surface of described plug pin The axial length of section is the 1/3 to 1/2 of its 1/4 conical surface section axial length；1/4 Cylinder Surface of described plug pin sets court The annular helical teeth that the port direction of 1/4 Cylinder Surface tilts.