Compression-resistant flame-retardant cable

Abstract

The invention relates to the technical field of cables, in particular to a compression-resistant flame-retardant cable, which comprises a plurality of cable main bodies, the adjacent cable main bodies are connected through a butt joint unit, the butt joint unit comprises a male plug and a female plug, and the male plug and the female plug on the adjacent cable main bodies are correspondingly distributed and locked through a locking unit. And sealing units are arranged between the locking units and the corresponding male plug and female plug. A composite sealing system composed of the first-stage sealing assembly and the second-stage sealing assembly is arranged, the butt-joint positions of all the components are distributed in the axial direction in a staggered mode, multiple independent sealing defense lines with zigzag paths are formed, connection with mechanical firmness and excellent compression resistance is provided through the locking unit in daily use, and under the emergency conditions such as a fire disaster, the sealing defense lines are not prone to deformation. The cable can be quickly separated only by dismounting a small number of bolts, and daily stability and emergency quick dismounting requirements are both considered.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cables, in particular to a compression-resistant and flame-retardant cable. BACKGROUND

[0002] The compression-resistant and flame-retardant cable is a special cable with mechanical protection performance and fire safety characteristics, and is widely used in scenes with high requirements for cable compression resistance and flame retardation, such as high-rise buildings, large shopping malls, underground engineering, etc.

[0003] In use, it is often necessary to connect multiple cable segments to extend the overall length and adapt to the use requirements. There are two common cable connection methods at present. One is to quickly connect the cables through male and female plug butt joint, and the other is to first connect two cable segments through crimping, then wrap the connection with a heat shrink tube and insulating tape to seal and insulate the connection.

[0004] Among them, the first connection method can quickly connect and disconnect two cable segments, but has certain defects in compression resistance and sealing effect, while the second connection method has good compression resistance and sealing effect, but takes a long time to disassemble and assemble. In the event of a fire or other emergency, the adjacent two cable segments need to be disconnected to prevent the spread of the fire, and the heat shrink tube needs to be removed first, which cannot quickly disassemble and assemble and is difficult to respond to emergencies in time.

[0005] Therefore, there is an urgent need for a compression-resistant and flame-retardant cable that can improve the disassembly and assembly efficiency while ensuring the compression resistance and sealing effect to quickly respond to emergencies. SUMMARY

[0006] Therefore, the purpose of the present application is to provide a compression-resistant and flame-retardant cable to solve the technical problems existing in the prior art, which comprises a plurality of cable bodies connected by butt joint units between adjacent cable bodies.

[0007] The butt joint unit comprises a male plug and a female plug, and the male plug and the female plug are arranged at the two ends of the cable body respectively. The male plug and the female plug on the adjacent cable bodies are distributed correspondingly and locked by a locking unit. The locking unit is provided with a sealing unit between the corresponding male plug and female plug.

[0008] The locking unit comprises two outer cover assemblies respectively covering the outer sides of the male plug and the female plug, and the two outer cover assemblies are connected by an associated assembly.

[0009] The sealing unit comprises a mounting ring sleeved on the male plug and the female plug. The opposite sides of the mounting rings on the adjacent cable bodies are each provided with a primary sealing assembly. The outer side of the primary sealing assembly is provided with a reinforcing assembly, and the reinforcing assembly is provided with a secondary sealing assembly between the outer cover assemblies.

[0010] The present application has the advantages that the compression-resistant and flame-retardant cable can quickly connect and disconnect two cable segments, and has good compression resistance and sealing effect.When the two adjacent cable bodies are subjected to a pulling force that causes the two bodies to move away from each other in the axial direction, the reinforcing assembly converts part of the axial pulling force into radial pressure to weaken the axial pulling force and strengthen the sealing effect of the primary sealing assembly.

[0011] Preferably, the cover assembly comprises two protective half-rings symmetrically arranged on the upper and lower sides of the male plug and the female plug, the protective half-ring is composed of two arc segments distributed along the axial direction and a fold line segment fixedly arranged between the two arc segments, the diameters of the two arc segments are different, the arc segment with the larger diameter is located on the side close to the sealing unit and has an arc-shaped skirt arranged on the outer side thereof, and the corresponding two arc-shaped skirts on the two adjacent cable bodies are oppositely arranged.

[0012] Preferably, the associated assembly comprises a locking half-ring clamped on the outer sides of the oppositely arranged two arc-shaped skirts, the cross section of the locking half-ring is U-shaped, the locking half-rings on the same side and the protective half-rings are jointly provided with two associated plates symmetrically distributed in front and back, one of the associated plates is provided with a plug rod penetrating through the two protective half-rings and the other associated plate, and the two associated plates oppositely arranged and the two locking half-rings oppositely arranged are jointly fixedly connected by bolts.

[0013] Preferably, the primary sealing assembly comprises two isolation rings installed on the opposite sides of the mounting ring, the two isolation rings are distributed from inside to outside, and the opposite sides of the two isolation rings are arranged in close contact, and the opposite sides of the two isolation rings are each adhered with a sealing ring.

[0014] Preferably, the reinforcing assembly comprises a first pressure half-ring symmetrically sleeved on the outer side of the male plug and a second pressure half-ring symmetrically sleeved on the outer side of the female plug, the side close to the adjacent cable body of the first pressure half-ring is radially provided with a first inclined block, the side close to the adjacent cable body of the second pressure half-ring is fixedly provided with a second inclined block, the second inclined block is located on the upper side of the first inclined block, and the inclined surfaces of the two inclined blocks are in close contact.

[0015] Preferably, the cross sections of the first pressure half-ring and the second pressure half-ring are both L-shaped, and the horizontal segment and the vertical segment of the second pressure half-ring are slidably connected by a spring.

[0016] Preferably, the second sealing assembly comprises a sealing half-ring, the inner wall of the protective half-ring is adhered with the sealing half-ring, and the cross section of the sealing half-ring is composed of multiple fold line portions.

[0017] Preferably, the outer wall of the male plug and the outer wall of the female plug are each uniformly provided with multiple groups of positioning grooves along the axial direction thereof, each group of positioning grooves is composed of multiple positioning grooves arranged in an annular array, and the positioning grooves are of a hemispherical structure.

[0018] Preferably, the butt joints of the male plug and the female plug, the butt joints of the first pressure half-ring and the second pressure half-ring, and the butt joints of the two protective half-rings are staggered in the axial direction of the cable body.

[0019] From the above technical scheme can be seen, the anti-pressing flame-retardant cable designed by the application has the following beneficial effects: 1, the application sets up a composite sealing system composed of a primary sealing assembly and a secondary sealing assembly through a sealing unit, and the abutment of each component is staggered in the axial direction, forming multiple independent and path winding sealing lines, which significantly enhances the overall dustproof and waterproof capability of the connection point, and is suitable for more severe and complex environments.

[0020] 2, the application converts the axial tension of the cable into radial pressure through the reinforcing assembly, and directly acts on the sealing ring, so that the connection point can not only maintain sealing when subjected to accidental pulling, but also will be pulled tighter, improving the sealing reliability and safety in dynamic working conditions such as vibration and traction.

[0021] 3, the application provides a mechanically strong and excellent compression-resistant connection during daily use through the locking unit, the outer cover assembly and the sealing ring and sealing half ring with buffering function jointly act, effectively resisting and buffering external radial pressure, and in emergency situations such as fire, the cable can be quickly separated by removing a small number of bolts, which meets the needs of daily stability and emergency quick disassembly. BRIEF DESCRIPTION OF DRAWINGS

[0022] The application will be further described below in combination with the drawings and examples.

[0023] Figure 1 is a perspective view of the application.

[0024] Figure 2 is a perspective view of the application after removing the locking unit part structure.

[0025] Figure 3 is a perspective view of the application after removing the sealing unit part structure.

[0026] Figure 4 is a perspective view of the cable body and the docking unit.

[0027] Figure 5 is a forward sectional view of the application.

[0028] Figure 6 is Figure 5 is an enlarged view of A in FIG.

[0029] Reference: 1, cable body; 2, butt joint unit; 21, male plug; 22, female plug; 23, positioning groove; 24, sealing ring; 3, locking unit; 31, cover assembly; 311, protective half ring; 312, arc-shaped skirt; 32, associated assembly; 321, locking half ring; 322, associated plate; 323, bolt; 324, insertion rod; 4, sealing unit; 41, mounting ring; 42, primary sealing assembly; 421, isolation ring; 422, sealing ring; 43, reinforcing assembly; 431, pressure half ring one; 432, pressure half ring two; 433, inclined surface block one; 434, inclined surface block two; 44, secondary sealing assembly; 441, sealing half ring. DETAILED DESCRIPTION

[0030] In order to make the person skilled in the art better understand the present application, the present application will be further described in detail below in combination with the drawings and specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0031] Reference Figure 1 With Figure 4 A compression-resistant flame-retardant cable comprises a plurality of cable bodies 1, which are composed of a conductor, an insulation layer, a filling layer, an armor layer and an outer sheath. The outer sheath can be made of flame-retardant polyethylene or halogen-free flame-retardant polyolefin material. Adjacent cable bodies 1 are connected by butt joint units 2.

[0032] Reference Figure 1 , Figure 2 With Figure 5 The butt joint unit 2 comprises a male plug 21 and a female plug 22. The male plug 21 and the female plug 22 are respectively arranged at both ends of the cable body 1. The male plug 21 and the female plug 22 on adjacent cable bodies 1 are correspondingly distributed and locked by a locking unit 3. The locking unit 3 is provided with a sealing unit 4 between the corresponding male plug 21 and female plug 22.

[0033] Reference Figure 2 With Figure 6 The outer wall of the male plug 21 and the female plug 22 is uniformly provided with a plurality of groups of positioning grooves 23 along the axial direction. Each group of positioning grooves 23 is composed of a plurality of annularly arrayed positioning grooves 23. The positioning grooves 23 are in a semispherical structure. One sealing ring 24 connected with the male plug 21 or the female plug 22 can be clamped between each group of positioning grooves 23. The number of sealing rings 24 is determined according to actual sealing needs to further improve the sealing effect of the cable connection and prevent external dust or water vapor from entering.

[0034] Reference Figure 1 With Figure 2The locking unit 3 includes two outer cover assemblies 31 that cover the outside of the male plug 21 and the female plug 22 respectively, and the two outer cover assemblies 31 are connected by an association assembly 32.

[0035] See Figure 1 , Figure 2 and Figure 6 The outer cover assembly 31 includes a protective semi-ring 311 symmetrically covered on both the upper and lower sides of the male plug 21 and the female plug 22. The protective semi-ring 311 is composed of two arc-shaped segments distributed along the axial direction and a broken line segment fixedly arranged between the two arc-shaped segments. The two arc-shaped segments have different diameters. The arc-shaped segment with a larger diameter is located on the side closer to the sealing unit 4 and has an arc-shaped skirt 312 integrally formed on its outer side. The two corresponding arc-shaped skirts 312 on the two adjacent cable bodies 1 are arranged opposite each other.

[0036] See Figure 1 , Figure 5 and Figure 6 The associated component 32 includes a locking half-ring 321 that is snapped onto the outside of two oppositely arranged arc-shaped skirts 312. The locking half-ring 321 has a U-shaped cross section. The locking half-ring 321 and the protective half-ring 311 on the same side are provided with two symmetrically distributed associated plates 322. One of the associated plates 322 is provided with a plug rod 324 that passes through the two upper and lower protective half-rings 311 and the other associated plate 322. The two upper and lower opposite associated plates 322 and the two upper and lower opposite locking half-rings 321 are fixedly connected by bolts 323.

[0037] After the sealing unit 4 is installed, cover both the upper and lower sides of the male plug 21 and the female plug 22 with protective semi-rings. 311. Next, snap the locking half-ring 321 onto the outside of the two opposite arc-shaped skirts 312 to initially connect the two opposite protective half-rings 311. Then, place the connecting plate 322 between the locking half-ring 321 and the protective half-ring 311 on the same side, so that the insert 324 passes through the corresponding protective half-ring 311 and the other connecting plate 322. Then, connect the two opposite connecting plates 322 with bolts 323 to complete the final locking work.

[0038] When encountering a fire or other unexpected emergencies that require the separation of two adjacent cable bodies 1, simply unscrew the front and rear bolts 323 and remove the connecting plate 322 to quickly dismantle the locking half ring 321 and the protective half ring 311.

[0039] See Figure 1 , Figure 5 and Figure 6The sealing unit 4 comprises the mounting ring 41 sleeved on the male plug 21 and the female plug 22, the opposite sides of the mounting ring 41 on the adjacent cable body 1 are respectively provided with a primary sealing assembly 42, the outer side of the primary sealing assembly 42 is provided with a reinforcing assembly 43, and the reinforcing assembly 43 is provided with a secondary sealing assembly 44 between the reinforcing assembly 43 and the outer cover assembly 31.

[0040] When the two adjacent cable bodies 1 are subjected to a pulling force for moving away from each other in the axial direction, the reinforcing assembly 43 converts part of the axial pulling force into radial pressure, so as to weaken the axial pulling force and strengthen the sealing effect of the primary sealing assembly 42.

[0041] Referring to Figure 5 and Figure 6 , the primary sealing assembly 42 comprises the isolation rings 421 mounted on the opposite sides of the mounting ring 41, the two opposite isolation rings 421 are distributed from inside to outside, and the opposite sides of the two isolation rings 421 are abutted, and the opposite sides of the two isolation rings 421 are respectively attached with the sealing rings 422.

[0042] After the male plug 21 and the female plug 22 are connected, the corresponding two mounting rings 41 are pushed to move towards each other, so that the isolation rings 421 drive the corresponding sealing rings 422 to move close to each other, and when the free ends of the isolation rings 421 abut against the side walls of the adjacent mounting rings 41, the primary sealing assembly 42 is moved to the position, at this time, the sealing ring 422 mounted on the inner isolation ring 421 preliminarily seals the joint between the male plug 21 and the female plug 22, and the sealing ring 422 mounted on the outer isolation ring 421 cooperates with the intermediate sealing member to play a secondary sealing role.

[0043] Referring to Figure 3 , Figure 5 and Figure 6 , the reinforcing assembly 43 comprises the pressure half-rings one 431 and the pressure half-rings two 432, the pressure half-rings one 431 are symmetrically sleeved on the outer side of the male plug 21, the pressure half-rings two 432 are symmetrically sleeved on the outer side of the female plug 22, the side of the pressure half-rings one 431 close to the adjacent cable body 1 is provided with the inclined blocks one 433 which is arranged in a radial sliding mode, the side of the pressure half-rings two 432 close to the adjacent cable body 1 is fixedly provided with the inclined blocks two 434, the inclined blocks two 434 are located on the outer side of the inclined blocks one 433 and the inclined surfaces of the two inclined blocks are abutted.

[0044] After the primary sealing assembly 42 is installed, the pressure half-rings one 431 are installed on the upper and lower sides of the male plug 21, and the pressure half-rings two 432 are installed on the upper and lower sides of the female plug 22, so that the inner side of the inclined blocks one 433 and the outer side of the sealing ring 422 are abutted, the outer side of the inclined blocks one 433 and the inner side of the inclined blocks two 433 are abutted, and the pressure half-rings two 432 and the pressure half-rings one 431 are abutted, so as to realize the compression of the primary sealing assembly 42 and the reinforcement protection of the joint between the male plug 21 and the female plug 22.

[0045] When the plug-in male plug 21 and the female plug 22 are subjected to an axial pulling force to move away from each other, the abutting half ring one 431 and the abutting half ring two 432 move relative to each other, the inclined block two 434 exerts a pressure on the inclined block one 433 to move towards the cable body 1 axis, the inclined block two 434 moves towards the cable body 1 axis and exerts a pressure on the sealing ring 422, so that the sealing ring 422 is more tightly attached to the corresponding male plug 21 and female plug 22, thereby enhancing the sealing effect and avoiding loosening due to pulling.

[0046] Referring to Figure 5 and Figure 6 , the cross section of the abutting half ring one 431 and the abutting half ring two 432 is L-shaped, and the transverse section and the vertical section of the abutting half ring two 432 are connected by a spring sliding connection; when the outer cover assembly 31 is not installed, under the elastic force of the spring, there is a gap between the inclined block two 434 and the inclined block one 433, and they are not attached, so that when the two cable bodies 1 need to be separated, the abutting half ring one 431 and the abutting half ring two 432 are quickly moved away from each other, avoiding the inclined block two 434 exerting pressure on the inclined block one 433, thereby increasing the resistance when separating.

[0047] Referring to Figure 5 and Figure 6 , the second sealing assembly 44 includes a sealing half ring 441, the inner wall of the protective half ring 311 is attached with the sealing half ring 441, the cross section of the sealing half ring 441 is composed of multiple fold line parts, which can be tightly attached to the inner wall of the protective half ring 311 and the outer wall of the reinforcing assembly 43, the male plug 21 and the female plug 22, thereby ensuring the sealing effect; at the same time, the sealing structure of the fold line effectively prolongs the sealing path, which can further enhance the sealing effect in cooperation with the first sealing assembly 42. In addition, the sealing ring 422 and the sealing half ring 441 are made of elastic rubber material, so in addition to the sealing effect, they can also buffer the radial pressure received by the cable, thereby enhancing the compression resistance effect.

[0048] It should be noted that, as Figure 5 and Figure 6 shown, the butt joint of the male plug 21 and the female plug 22, the butt joint of the abutting half ring one 431 and the abutting half ring two 432, and the butt joint of the two protective half rings 311 are staggered in the axial direction of the cable body 1, thereby achieving further enhancement of the sealing effect.

[0049] In the description of the present application, it needs to be understood that the orientation words such as "front, back, up, down, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicated orientation or position relationship is generally based on the orientation or position relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, without making the opposite statement, these orientation words do not indicate and imply that the device or element indicated must have a particular orientation or be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer relative to the contour of each component itself.

[0050] In the description of the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact through intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0051] In the description of the present application, it also needs to be explained that, unless otherwise explicitly specified and limited, the terms "set", "connected", "mounted", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through intermediate medium, it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0052] The anti-pressure flame-retardant cable provided by the present application is introduced in detail above. For those skilled in the art, according to the idea of the embodiment of the present application, there will be changes in specific implementation and application range. In view of the above, the content of the specification should not be understood as a limitation on the present application.

Claims

1. A pressure-resistant and flame-retardant cable, characterized in that: It includes several cable bodies, and adjacent cable bodies are connected by a docking unit; The docking unit includes a male plug and a female plug, which are respectively located at both ends of the cable body. The male plugs and female plugs on adjacent cable bodies are distributed accordingly and locked by a locking unit. A sealing unit is provided between the locking unit and the corresponding male plug and female plug. The locking unit includes two outer cover assemblies that cover the outside of the male plug and the female plug respectively, and the two outer cover assemblies are connected by an association component; The sealing unit includes mounting rings fitted on the male and female plugs. Each mounting ring on the adjacent cable body is provided with a primary sealing component on the opposite side. A reinforcing component is provided outside the primary sealing component. A secondary sealing component is provided between the reinforcing component and the outer cover component. When two adjacent cable bodies are subjected to a tensile force that causes them to move away from each other along the axial direction, a reinforcing component converts part of the axial tensile force into radial pressure, thereby weakening the axial tensile force and enhancing the sealing effect of the primary sealing component.

2. The pressure-resistant and flame-retardant cable according to claim 1, characterized in that, The outer casing assembly includes protective semi-rings symmetrically installed on both the upper and lower sides of the male and female plugs. The protective semi-rings consist of two arc-shaped segments distributed along the axial direction and a broken line segment fixedly installed between the two arc-shaped segments. The two arc-shaped segments have different diameters. The arc-shaped segment with a larger diameter is located on the side closer to the sealing unit and has an arc-shaped skirt on its outer side. The two corresponding arc-shaped skirts on two adjacent cable bodies are arranged opposite each other.

3. The pressure-resistant and flame-retardant cable according to claim 2, characterized in that, The associated component includes a locking half-ring snapped onto the outside of two oppositely arranged arc-shaped skirts. The locking half-ring has a U-shaped cross-section. The locking half-rings on the same upper and lower sides and the protective half-rings are provided with two symmetrically distributed associated plates. One of the associated plates is provided with a plug rod that passes through the two upper and lower protective half-rings and the other associated plate. The two upper and lower opposite associated plates and the two upper and lower opposite locking half-rings are fixedly connected by bolts.

4. The pressure-resistant and flame-retardant cable according to claim 1, characterized in that, The primary sealing assembly includes two isolation rings mounted on opposite sides of the mounting ring. The two isolation rings are distributed from the inside out, and the opposite sides of the two isolation rings are fitted together. Sealing rings are adhered to the opposite sides of the two isolation rings.

5. The pressure-resistant and flame-retardant cable according to claim 2, characterized in that, The reinforcing component includes a first pressure-resistant half-ring symmetrically fitted on the outside of the male plug and a second pressure-resistant half-ring symmetrically fitted on the outside of the female plug. A first inclined block is radially slidably arranged on the side of the first pressure-resistant half-ring close to the adjacent cable body, and a second inclined block is fixedly arranged on the side of the second pressure-resistant half-ring close to the adjacent cable body. The second inclined block is located on the upper side of the first inclined block and the inclined surfaces of the two are in contact.

6. The pressure-resistant and flame-retardant cable according to claim 5, characterized in that, Both the first and second pressure-resistant semi-rings have L-shaped cross sections, and the horizontal and vertical sections of the second pressure-resistant semi-ring are connected by a spring.

7. The pressure-resistant and flame-retardant cable according to claim 1, characterized in that, The second sealing assembly includes a sealing half-ring, and the inner wall of the protective half-ring is adhered with the sealing half-ring. The cross-section of the sealing half-ring is composed of multiple zigzag sections.

8. The pressure-resistant and flame-retardant cable according to claim 1, characterized in that, Both the male and female plugs have multiple sets of positioning grooves evenly distributed along their axial direction on their outer walls. Each set of positioning grooves consists of multiple positioning grooves arranged in a ring array, and the positioning grooves have a hemispherical structure.

9. A pressure-resistant and flame-retardant cable according to claim 5, characterized in that, The joints between the male and female plugs, the joints between the first and second pressure-resistant half-rings, and the joints between the two protective half-rings are staggered along the axial direction of the cable body.

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