CN111969548A - Cable joint protection component structure - Google Patents

Abstract

The invention relates to the technical field of electric power engineering, and discloses a cable joint protection component structure, comprising a connection sleeve, a clamping sleeve is arranged in the middle of the connection sleeve, the clamping sleeve is made of insulating elastic material, and the outer center of the clamping sleeve is provided with a clamping sleeve. The positioning convex ring, the center of the connecting sleeve is provided with an annular positioning groove matched with the positioning convex ring; the two ends of the inner hole of the clamping sleeve are symmetrically provided with sealing cone surfaces, the sealing cone surface is provided with an annular sealing groove, and the annular sealing groove is provided with There are double-lip sealing rings; both ends of the connecting sleeve are provided with end caps, the inner end face of the end cap extends axially to form a support sleeve, the inner wall of the inner end of the support sleeve is provided with a supporting cone surface, and the inner wall of the outer end of the end cap is at the inner wall of the end cap. A sealing retaining ring is provided, the inner wall of the sealing retaining ring is provided with an end cap sealing groove, and an end cap sealing ring is arranged in the end cap sealing groove. The invention adopts the triple sealing of the end cover sealing ring, the double-lip sealing ring and the central sealing ring in sequence from the outside to the inside, and the sealing effect at the cable joint is very good.

Description

A cable joint protection component structure

technical field

The invention relates to the technical field of electric power engineering, in particular to a cable joint protection component structure.

Background technique

Cable protective sleeve and cable protective tube usually refer to a protective tube that is sleeved on the outside of the cable and has a certain mechanical strength in order to prevent the cable from being damaged. In electrical engineering, the cable is laid in the channel. When the cable needs to be led to the utility pole and power distribution equipment, the cable needs to be connected. The cable generally includes a wire core and an outer casing. After the cable core is connected, it is usually directly Put a polyethylene cable jacket on the outside to protect the overlap. However, since the outer sleeve at the cable joint is broken, the sealing performance is reduced, and the bending and tensile properties of the cable joint are also significantly reduced. The ordinary polyethylene cable sheath has low strength and very limited protection performance. It is impossible to ensure the tensile and bending resistance requirements of the cable joint, and it cannot adapt to the harsh external environment. Even if the surrounding environment of the cable is good, an additional rigid protection tube must be set outside the cable to achieve good protection of the cable.

SUMMARY OF THE INVENTION

In order to solve the above problems of the cable sheath at the cable joint in the prior art, the present invention provides a cable joint protection assembly structure with good sealing performance, stable performance and increased stability at the cable joint.

In order to achieve the above object, the present invention adopts the following technical solutions:

A cable joint protection assembly structure includes a connection sleeve, a clamping sleeve is arranged in the middle of the connection sleeve, the clamping sleeve is made of insulating elastic material, and a positioning convex ring is arranged in the center of the outer side of the clamping sleeve, The center of the connecting sleeve is provided with an annular positioning groove which is matched with the positioning convex ring; the two ends of the inner hole of the clamping sleeve are symmetrically provided with a sealing cone surface with an outer large and an inner small, and an annular sealing surface is provided on the sealing cone surface The annular sealing groove is provided with a double-lip sealing ring, and an annular gap is formed between the outer walls of the two ends of the clamping sleeve and the inner wall of the connecting sleeve; both ends of the connecting sleeve are provided with end caps, and the end caps It is threadedly connected with the connecting sleeve, the inner end face of the end cover extends along the axial direction to form a support sleeve, the inner wall of the inner end of the support sleeve is provided with a support cone surface, and the inner wall of the outer end of the end cover is provided with a sealing ring, The inner wall of the sealing ring is provided with an end cover sealing groove, and the end cover sealing groove is provided with an end cover sealing ring; when the end cover and the connecting sleeve are threadedly connected, the supporting cone surface is connected to the outer side of the clamping sleeve. End abuts.

Before the two cables need to be butt-connected, first assemble the clamping sleeve and the connecting sleeve, and then let one of the cables pass through the end cap, the connecting sleeve and the The middle position of the connection sleeve is just at the joint of the two cables. At this time, the cable joint is located between the two double-lip sealing rings. Finally, the end cover and the connection sleeve are tightened. The support cone of the support sleeve is pressed against both ends of the clamping sleeve. Due to the elasticity of the clamping sleeve, the outer sides of the two ends of the clamping sleeve shrink to hold the cable tightly. The double-lip sealing ring on the sealing cone isolates the cable joint. Sealing, the end cover sealing ring in the end cover also plays a sealing role to prevent external moisture, sediment, etc. from entering the connecting sleeve; the clamping sleeve has an elastic reaction force on the support sleeve when it is compressed and contracted, and the elastic reaction force The end cover has a pre-tightening force, which can prevent the end cover from loosening; the cable joint is connected and sealed by this kind of protection component, even if the cable joint is bent, it will not cause disconnection, and the performance is very stable.

Preferably, the outer sides of the two ends of the clamping sleeve extend to form supporting convex rings, the cross section of the supporting convex ring is circular, and the supporting convex ring and the clamping sleeve are integral structures. On the one hand, the supporting convex ring increases the stability of the clamping sleeve, and on the other hand, when the supporting cone surface is in contact with the supporting convex ring, the force on both ends of the clamping sleeve is more stable.

Preferably, each sealing cone surface is provided with two annular protruding teeth at the position outside the annular sealing groove. When both ends of the clamping sleeve are contracted by force, the annular protruding teeth are engaged with the outer skin of the cable, which on the one hand enhances the sealing effect, and on the other hand enhances the tensile performance of the cable joint.

Preferably, the included angle between the sealing conical surface and the axial direction is 5°-10°. Among the two annular convex teeth on the same sealing conical surface, the tooth height of the outer annular convex tooth is the same as the inner annular convex tooth. The ratio of tooth height is 1.1-1.3.

Preferably, a central sealing groove is provided in the center of the inner hole of the clamping sleeve, and a central sealing ring is provided in the central sealing groove. The central sealing ring in the central sealing groove directly holds and seals the cable joint (joint).

Preferably, the clamping sleeve is made of nylon material, and the connecting sleeve and the end cover are made of aluminum alloy, stainless steel, iron alloy and other metal materials. Nylon material has greater strength and elasticity, and has good insulation performance; the connection sleeve is made of rigid metal material, which has good bending and compression resistance, so as to protect the cable joint well.

Preferably, a protective sleeve is provided on the outer side of the connecting sleeve, the protective sleeve and the connecting sleeve are gap-fitted, and an annular clamping groove is provided at the end face gap between the protective sleeve and the connecting sleeve, and the cross-section of the annular clamping groove is a Trapezoidal; the outer end side of the end cover is provided with a flange, the inner side of the flange is provided with a sealing convex ring matched with the annular clamping groove, the cross section of the sealing convex ring is trapezoidal, and the bottom of the annular clamping groove is in the shape of a trapezoid. An end sealing ring with a trapezoidal cross-section is provided; the protective sleeve is made of composite plastics. The protective sleeve protects the connecting sleeve and prevents the connecting sleeve from rusting and corroding.

Preferably, the outer surface of the connecting sleeve is provided with a plurality of limiting grooves distributed along the circumferential direction and parallel to the axis, and the inner wall of the protective sleeve is provided with limiting protruding strips corresponding to the limiting grooves one-to-one. The limit grooves and the limit protruding strips are matched for positioning to prevent the relative rotation between the protective sleeve and the connecting sleeve, and at the same time, the limit protrusions can also increase the strength of the protective sleeve itself.

Preferably, an annular groove is provided at the outer middle portion of the connecting sleeve, and the annular groove is filled with heat insulating fillers. The annular groove can reduce the material used for the connection sleeve, and at the same time, the heat insulating filler in the annular groove plays a role of heat insulation and slows down the transfer of external heat to the cable.

Preferably, the outer end surface of the end cap extends outward to form a convex ring, and the outer surface of the convex ring is provided with knurling; the outer end surface of the convex ring extends to form an auxiliary joint, and the outer surface of the auxiliary joint is provided with The outer surface of the convex ring is provided with an end surface sealing groove at the outer bottom of the auxiliary joint. The convex ring is easy to hold and rotate by hand, so that the thread between the end cover and the connection sleeve is tightened; some cables need to be fully protected, and the end of the other cable protection tube can be directly connected to the auxiliary connector thread, and in the end face sealing groove Set the corresponding sealing gasket to seal.

Therefore, the present invention has the following beneficial effects: (1) the end cover sealing ring, the double-lip sealing ring and the central sealing ring are triple-sealed in sequence from the outside to the inside, and the sealing effect at the cable joint is very good; (2) the cable joint is resistant to compression , The compressive performance is significantly improved, and the connection stability and reliability of the cable joint are greatly improved.

Description of drawings

FIG. 1 is a schematic structural diagram of the present invention.

FIG. 2 is a front view of FIG. 1 .

FIG. 3 is a left side view of FIG. 2 .

FIG. 4 is a cross-sectional view at A-A in FIG. 3 .

FIG. 5 is a schematic diagram of the state in which the protective cover is removed in FIG. 2 .

FIG. 6 is a schematic diagram of the connection of the end cover, the connecting sleeve and the clamping sleeve.

FIG. 7 is a schematic diagram of the connection of the connecting sleeve and the clamping sleeve.

Figure 8 is a cross-sectional view of the end cap.

FIG. 9 is a partial enlarged schematic diagram of part B in FIG. 4 .

FIG. 10 is a partial enlarged schematic diagram of C in FIG. 4 .

Figure 11 is a schematic diagram of the connection between the end cap and the cable protection tube.

In the figure: connecting sleeve 1, annular positioning groove 100, limiting groove 101, annular groove 102, clamping sleeve 2, positioning convex ring 200, sealing cone surface 201, annular sealing groove 202, double-lip sealing ring 203, annular gap 204, supporting convex ring 205, annular convex teeth 206, central sealing groove 207, central sealing ring 208, end cover 3, supporting sleeve 300, supporting cone 301, sealing retaining ring 302, end cover sealing groove 303, end cover sealing ring 304, flange 305, sealing convex ring 306, end sealing ring 307, convex ring 308, knurling 309, auxiliary joint 310, end face sealing groove 311, protective sleeve 4, annular groove 400, limit convex strip 401, cable 5. Cable protection tube 6.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments:

As shown in Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 7, a cable joint protection assembly structure includes a connecting sleeve 1, a clamping sleeve 2 is arranged in the middle of the connecting sleeve 1, and the clamping sleeve is made of insulating elastic material The outer center of the clamping sleeve 2 is provided with a positioning convex ring 200, and the center of the connecting sleeve 1 is provided with an annular positioning groove 100 matched with the positioning convex ring; A small sealing cone surface 201, an annular sealing groove 202 is arranged on the sealing cone surface 201, a double-lip sealing ring 203 is arranged in the annular sealing groove 202, and an annular gap is formed between the outer walls of the two ends of the clamping sleeve 2 and the inner wall of the connecting sleeve 204, the outer sides of the two ends of the clamping sleeve 2 extend to form a supporting convex ring 205, the cross section of the supporting convex ring 205 is circular, and the supporting convex ring and the clamping sleeve are integral structures;

Each sealing cone surface 201 is provided with two annular protruding teeth 206 on the outer side of the annular sealing groove. The included angle between the sealing cone surface 201 and the axial direction is 5°-10°. Among the annular protruding teeth 206, the ratio of the tooth height of the outer annular protruding teeth to that of the inner annular protruding teeth is 1.1-1.3; the center of the inner hole of the clamping sleeve 2 is provided with a central sealing groove 207. A central sealing ring 208 is provided.

As shown in Figures 6 and 8, both ends of the connecting sleeve 1 are provided with end caps 3, the end caps are threadedly connected to the connecting sleeve, and the inner end surface of the end cap 3 extends in the axial direction to form a supporting sleeve 300. The inner wall of the end is provided with a support cone surface 301. As shown in FIG. 10, the inner wall of the outer end of the end cover 3 is provided with a sealing retaining ring 302, and the inner wall of the sealing retaining ring 302 is provided with an end cap sealing groove 303. There is an end cap sealing ring 304; when the end cap and the connecting sleeve are threadedly connected, the support cone abuts the outer end of the clamping sleeve; the connecting sleeve and the end cap are made of aluminum alloy, stainless steel, iron alloy and other metal materials. The clamping sleeve 2 in this embodiment is made of nylon material, and the connecting sleeve and the end cover are both made of aluminum alloy.

As shown in Figure 4, Figure 5 and Figure 9, the outer side of the connecting sleeve 1 is provided with a protective sleeve 4, the protective sleeve is made of composite plastic, the protective sleeve 4 and the connecting sleeve 1 are gap-fitted, and the end faces of the protective sleeve and the connecting sleeve are in the gap. An annular slot 400 is provided, and the cross-section of the annular slot 400 is trapezoidal; the outer end side of the end cover 3 is provided with a flange 305, and the inner side of the flange 305 is provided with a sealing convex ring 306 that cooperates with the annular slot. The cross section of the convex ring 306 is trapezoidal, and the bottom of the annular groove is provided with an end seal ring 307 with a trapezoidal cross section; 101, the inner wall of the protective sleeve 4 is provided with a limit protruding strip 401 corresponding to the limit groove one-to-one; the outer middle part of the connection sleeve 1 is provided with an annular groove 102, and the annular groove is filled with thermal insulation filler.

As shown in FIGS. 5 , 8 and 10 , the outer end surface of the end cover 3 extends outward to form a convex ring 308 , and the outer surface of the convex ring is provided with knurling 309 ; the outer end surface of the convex ring 308 extends to form an auxiliary joint 310 . The outer side of the joint is provided with threads, and the outer side of the convex ring is provided with an end face sealing groove 311 at the outer bottom of the auxiliary joint.

With reference to the accompanying drawings, the principle of the present invention is as follows: before the two cables 5 need to be connected by butt, the clamping sleeve and the connecting sleeve are assembled together, and then one of the cables is passed through the end cover, the connecting sleeve and the end cover in turn, and then Connect the two cables butt, move the connection sleeve so that the middle position of the connection sleeve is just at the joint of the two cables, and the cable joint is located between the two double-lip sealing rings, and finally tighten the end cover and the connection sleeve. , During the tightening process of the end cover, the support cone surface of the support sleeve on the end cover is pressed against both ends of the clamping sleeve. Because the clamping sleeve is elastic, the outer sides of the two ends of the clamping sleeve shrink to hold the cable tightly, and the sealing cone surface The double-lip sealing ring on the top isolates and seals the cable joint, and the end cover sealing ring in the end cover also plays a sealing role to prevent external moisture, sediment, etc. from entering the connecting sleeve; the clamping sleeve supports the support when it is compressed and contracted The sleeve has an elastic reaction force, which makes the end cover have a pre-tightening force, which can prevent the end cover from loosening; the cable joint is connected and sealed by this kind of protection component, even if the cable joint is bent, it will not cause Disconnected, the performance is very stable. As shown in Figure 10, the cable protection tube 6 in other parts of the cable can also be directly threaded and sealed with the auxiliary joint. This kind of protection component and the cable protection tube are combined to construct a cable protection system, which has a good protection effect on the cable.

The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent replacements or modifications made based on the present invention in order to solve basically the same technical problems and achieve basically the same technical effects are all included in the protection scope of the present invention.

Claims (10)

1. A cable joint protection assembly structure, comprising a connecting sleeve, characterized in that, a clamping sleeve is provided in the middle of the connecting sleeve, the clamping sleeve is made of insulating elastic material, and the outer center of the clamping sleeve is A positioning convex ring is provided, and the center of the connecting sleeve is provided with an annular positioning groove matched with the positioning convex ring; the two ends of the inner hole of the clamping sleeve are symmetrically provided with a sealing cone surface with an outer large and an inner small. There is an annular sealing groove on the surface, a double-lip sealing ring is arranged in the annular sealing groove, and an annular gap is formed between the outer walls of the two ends of the clamping sleeve and the inner wall of the connecting sleeve; both ends of the connecting sleeve are provided with ends Cover, the end cover is screwed with the connecting sleeve, the inner end surface of the end cover extends in the axial direction to form a support sleeve, the inner wall of the inner end of the support sleeve is provided with a support cone surface, and the inner wall of the outer end of the end cover is located at the inner wall of the outer end. A sealing retaining ring is provided, the inner wall of the sealing retaining ring is provided with an end cap sealing groove, and an end cap sealing ring is arranged in the end cap sealing groove; when the end cap and the connecting sleeve are threadedly connected, the supporting cone surface Abutting against the outer end of the clamping sleeve. 2 . The structure of a cable joint protection assembly according to claim 1 , wherein the outer sides of both ends of the clamping sleeve extend to form a support convex ring, the cross section of the support convex ring is circular, and the The supporting convex ring and the clamping sleeve are integral structure. 3. A cable joint protection assembly structure according to claim 1 or 2, wherein each sealing cone surface is provided with two annular protruding teeth on the part outside the annular sealing groove. 4. The structure of a cable joint protection assembly according to claim 3, wherein the included angle between the sealing cone surface and the axial direction is 5°-10°, and two annular protrusions on the same sealing cone surface Among the teeth, the ratio of the tooth height of the outer annular convex teeth to the tooth height of the inner annular convex teeth is 1.1-1.3. 5 . The cable joint protection assembly structure according to claim 1 , wherein a central sealing groove is provided in the center of the inner hole of the clamping sleeve, and a central sealing ring is provided in the central sealing groove. 6 . 6 . The structure of a cable joint protection assembly according to claim 1 , wherein the clamping sleeve is made of nylon material, and the connecting sleeve and the end cover are made of metal such as aluminum alloy, stainless steel, and iron alloy. 7 . material. 7 . The structure of a cable joint protection assembly according to claim 1 , wherein a protective sleeve is provided on the outer side of the connecting sleeve, the protective sleeve and the connecting sleeve are gap-fitted, and the protective sleeve and the connecting sleeve are in a clearance fit. 8 . An annular clamping groove is arranged at the end face gap, and the cross-section of the annular clamping groove is trapezoidal; the outer end side of the end cover is provided with a flange, and the inner side of the flange is provided with a sealing convex ring matched with the annular clamping groove, The cross section of the sealing convex ring is trapezoidal, and the bottom of the annular snap groove is provided with an end sealing ring with a trapezoidal cross section; the protective sleeve is made of composite plastic. 8 . The structure of a cable joint protection assembly according to claim 7 , wherein a plurality of limit grooves distributed along the circumference and parallel to the axis are arranged on the outer surface of the connection sleeve, and the protection sleeve The inner wall of the device is provided with limiting protruding strips corresponding to the limiting grooves one-to-one. 9 . The cable joint protection assembly structure according to claim 7 or 8 , wherein an annular groove is provided at the outer middle portion of the connection sleeve, and the annular groove is filled with thermal insulation fillers. 10 . 10 . The cable joint protection assembly structure according to claim 1 , wherein the outer end surface of the end cap extends outward to form a convex ring, and the outer surface of the convex ring is provided with knurling; The outer end surface of the ring extends to form an auxiliary joint, the outer surface of the auxiliary joint is provided with threads, and the outer surface of the convex ring is provided with an end surface sealing groove at the outer bottom of the auxiliary joint.

Images