Compression resistant fire resistant cable

Abstract

The present application relates to cable technical field, especially relates to a kind of compression-resistant flame-retardant cable, including several cable main bodies, and the public plug and female plug are connected by butt joint unit between adjacent cable main bodies, and the public plug and female plug on adjacent cable main bodies are distributed and locked by locking unit, and sealing unit is arranged between locking unit and corresponding public plug and female plug.The present application is provided with the composite sealing system consisting of primary sealing assembly and secondary sealing assembly, and the abutted parts of each component are staggered distribution in axial direction, form multiple independent, path tortuous sealing defense line, provide mechanical firm, excellent compression resistance connection by locking unit in daily use, and in emergency such as fire, only a small amount of bolts can be quickly separated cable, and the daily stable and emergency quick disassembly needs are considered.

Description

Technical Field

[0001] This invention relates to the field of cable technology, and in particular to a pressure-resistant and flame-retardant cable. Background Technology

[0002] Compression-resistant and flame-retardant cables are a type of special cable that combines mechanical protection and fire safety features. They are widely used in scenarios where high compressive strength and flame-retardant performance of cables are required, such as high-rise buildings, large shopping malls, and underground projects.

[0003] When using cables, it is often necessary to connect multiple cable segments to extend the overall length and adapt to usage needs. Currently, there are two common cable connection methods: one is to quickly connect the cables by mating male and female plugs, and the other is to first connect the two cable segments by crimping, and then put heat shrink tubing on the connection and wrap it with insulating tape to seal and insulate the connection.

[0004] While the first connection method can quickly connect and disconnect the two cable segments, it has certain deficiencies in terms of pressure resistance and sealing effect. The second connection method has better pressure resistance and sealing effect, but it takes a long time to disassemble and assemble. In the event of a fire or other emergencies, if it is necessary to disconnect the two adjacent cable segments to prevent the fire from spreading, the heat shrink tubing must be removed first, which cannot be done quickly and makes it difficult to respond to emergencies in a timely manner.

[0005] Therefore, there is an urgent need for a pressure-resistant and flame-retardant cable that can improve disassembly and assembly efficiency while ensuring pressure resistance and sealing performance, so as to quickly respond to emergencies. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to provide a pressure-resistant and flame-retardant cable to solve the technical problems existing in the prior art, comprising a plurality of cable bodies, with adjacent cable bodies connected by a docking unit.

[0007] 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.

[0008] 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.

[0009] The sealing unit includes mounting rings fitted on the male and female plugs. Each mounting ring on the adjacent cable body has a primary sealing component on its 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.

[0010] 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.

[0011] Preferably, the outer cover assembly includes protective semi-rings symmetrically arranged on both the upper and lower sides of the male plug and the female plug. The protective semi-rings are 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 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.

[0012] Preferably, 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 associated plates symmetrically distributed front and back. 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.

[0013] Preferably, the primary sealing assembly includes two isolation rings mounted on opposite sides of the mounting ring, the two isolation rings being distributed from the inside out, and the opposite sides of the two isolation rings being fitted together, with sealing rings adhered to the opposite sides of the two isolation rings.

[0014] Preferably, the reinforcing component includes a first pressure half-ring symmetrically sleeved on the outside of the male plug and a second pressure half-ring symmetrically sleeved on the outside of the female plug. The first pressure half-ring has a first inclined block slidably arranged radially on the side near the adjacent cable body, and the second pressure half-ring has a second inclined block fixedly arranged on the side near 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.

[0015] Preferably, both the first and second pressing semi-rings have L-shaped cross-sections, and the horizontal and vertical sections of the second pressing semi-ring are slidably connected by a spring.

[0016] Preferably, the secondary 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 which is composed of multiple zigzag sections.

[0017] Preferably, multiple sets of positioning grooves are uniformly formed on the outer wall of both the male and female plugs along their axial direction. Each set of positioning grooves consists of multiple positioning grooves arranged in a ring array, and the positioning grooves have a hemispherical structure.

[0018] Preferably, the joints between the male and female plugs, the joints between the first and second pressure half-rings, and the joints between the two protective half-rings are staggered along the axial direction of the cable body.

[0019] As can be seen from the above technical solutions, the pressure-resistant and flame-retardant cable designed in this invention has the following beneficial effects: 1. This invention sets up a composite sealing system consisting of a primary sealing component and a secondary sealing component through a sealing unit, and the joints of each component are staggered in the axial direction, forming multiple independent and tortuous sealing defense lines, which significantly enhances the overall dustproof and waterproof capabilities of the connection point and is suitable for harsher and more complex environments.

[0020] 2. This invention transforms the axial tension of the cable into radial pressure by reinforcing components, which is then applied directly to the sealing ring. This ensures that the connection point not only remains sealed when subjected to accidental pulling, but also tightens further with each pull, thereby improving the sealing reliability and safety under dynamic conditions such as vibration and traction.

[0021] 3. The present invention provides a mechanically robust and pressure-resistant connection during daily use through the locking unit. The outer cover assembly, together with the sealing ring and sealing half ring with buffer function, effectively resists and buffers external radial pressure. In emergency situations such as fire, the cable can be quickly separated by removing only a few bolts, thus taking into account both the needs of daily stability and emergency quick disassembly and assembly. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0024] Figure 2 This is a three-dimensional structural diagram of the present invention after removing the locking unit portion.

[0025] Figure 3 This is a three-dimensional structural diagram of the present invention after removing the sealing unit portion.

[0026] Figure 4 It is a three-dimensional structural diagram of the cable body and the docking unit.

[0027] Figure 5 This is a front cross-sectional view of the present invention.

[0028] Figure 6 yes Figure 5 Enlarged diagram of point A in the middle.

[0029] Reference numerals: 1. Cable body; 2. Connecting unit; 21. Male plug; 22. Female plug; 23. Positioning groove; 24. Sealing ring; 3. Locking unit; 31. Outer cover assembly; 311. Protective half-ring; 312. Arc-shaped skirt; 32. Connecting assembly; 321. Locking half-ring; 322. Connecting plate; 323. Bolt; 324. Insert rod; 4. Sealing unit; 41. Mounting ring; 42. Primary sealing assembly; 421. Isolation ring; 422. Sealing ring; 43. Reinforcing assembly; 431. Pressing half-ring one; 432. Pressing half-ring two; 433. Inclined block one; 434. Inclined block two; 44. Secondary sealing assembly; 441. Sealing half-ring. Detailed Implementation

[0030] To enable those skilled in the art to better understand the present invention, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] See Figure 1 and Figure 4 A pressure-resistant and flame-retardant cable includes several cable bodies 1. Each cable body 1 consists of a conductor, an insulation layer, a filling layer, an armor layer, and an outer sheath. The outer sheath may be made of flame-retardant polyethylene or halogen-free flame-retardant polyolefin material. Adjacent cable bodies 1 are connected by a butt joint unit 2.

[0032] See Figure 1 , Figure 2 and Figure 5 The docking unit 2 includes a male plug 21 and a female plug 22, which are respectively located at both ends of the cable body 1. The male plugs 21 and female plugs 22 on adjacent cable bodies 1 are correspondingly distributed and locked by locking unit 3. A sealing unit 4 is provided between the locking unit 3 and the corresponding male plug 21 and female plug 22.

[0033] See Figure 2 and Figure 6 Both the male plug 21 and the female plug 22 have multiple sets of positioning grooves 23 evenly opened along their axial direction on their outer walls. Each set of positioning grooves 23 consists of multiple positioning grooves 23 distributed in a ring array. The positioning grooves 23 have a hemispherical structure. A sealing ring 24 that is fitted and connected to the male plug 21 or the female plug 22 can be snapped between each set of positioning grooves 23. The number of sealing rings 24 is determined according to the actual sealing needs to further improve the sealing effect at the cable connection and prevent external dust or moisture from entering.

[0034] See Figure 1 and 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 includes mounting rings 41 fitted on the male plug 21 and the female plug 22. Each side of the mounting rings 41 on the adjacent cable body 1 is provided with a primary sealing component 42. A reinforcing component 43 is provided outside the primary sealing component 42. A secondary sealing component 44 is provided between the reinforcing component 43 and the outer cover component 31.

[0040] When two adjacent cable bodies 1 are subjected to a tensile force that causes them to move away from each other along the axial direction, the reinforcing component 43 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 42.

[0041] See Figure 5 and Figure 6 The primary sealing assembly 42 includes an isolation ring 421 mounted on the opposite side of the mounting ring 41. The two opposite isolation rings 421 are distributed from the inside to the outside, and the opposite sides of the two isolation rings 421 are fitted together. A sealing ring 422 is adhered to the opposite side of the two isolation rings 421.

[0042] After the male plug 21 and the female plug 22 are connected, the two corresponding mounting rings 41 are pushed to move towards each other, so that the isolation ring 421 drives the corresponding sealing ring 422 to move closer to each other. When the free ends of the isolation rings 421 abut against the side walls of the adjacent mounting rings 41, they are in place. At this time, the sealing ring 422 installed on the inner isolation ring 421 performs a preliminary seal at the joint between the male plug 21 and the female plug 22, while the sealing ring 422 installed on the outer isolation ring 421 cooperates with the intermediate sealing element to play a secondary sealing role.

[0043] See Figure 3 , Figure 5 and Figure 6 The reinforcing component 43 includes a first pressure half-ring 431 symmetrically sleeved on the outside of the male plug 21 and a second pressure half-ring 432 symmetrically sleeved on the outside of the female plug 22. The first pressure half-ring 431 has a first inclined block 433 radially slidably arranged on the side of the first pressure half-ring 431 close to the adjacent cable body 1. The second pressure half-ring 432 has a second inclined block 434 fixedly arranged on the side of the second pressure half-ring 432 close to the adjacent cable body 1. The second inclined block 434 is located outside the first inclined block 433 and the inclined surfaces of the two are in contact.

[0044] After the primary sealing assembly 42 is installed, the first pressure half-ring 431 is installed on the upper and lower sides of the male plug 21, and the second pressure half-ring 432 is installed on the upper and lower sides of the female plug 22. This makes the inner side of the first inclined block 433 fit with the outer side of the sealing ring 422, and the outer side of the first inclined block 433 fit with the inner side of the second inclined block 433. The second pressure half-ring 432 and the first pressure half-ring 431 abut against each other, thereby pressing the primary sealing assembly 42 and strengthening the protection at the joint between the male plug 21 and the female plug 22.

[0045] When the male plug 21 and female plug 22 are subjected to an axial tensile force that moves them apart, the first pressing half ring 431 and the second pressing half ring 432 move relative to each other. The second inclined block 434 exerts pressure on the first inclined block 433, causing it to move towards the axis of the cable body 1. The second inclined block 434 moves towards the axis of the cable body 1 and transmits the pressure to the sealing ring 422, making the sealing ring 422 fit more tightly with the corresponding male plug 21 and female plug 22, strengthening the sealing effect and preventing loosening due to pulling.

[0046] See Figure 5 and Figure 6 Both the first and second half-rings of the pressure ring 431 and the second half-ring 432 have L-shaped cross sections, and the horizontal and vertical sections of the second half-ring 432 are connected by a spring. When the outer cover assembly 31 is not installed, under the action of the spring force, there is a gap between the second inclined block 434 and the first inclined block 433, and they are not in contact. This allows the first and second half-rings of the pressure ring 431 and the second half-ring 432 to move in opposite directions quickly when the two cable bodies 1 need to be separated, so as to avoid the second inclined block 434 from putting pressure on the first inclined block 433, thereby increasing the resistance during separation.

[0047] See Figure 5 and Figure 6 The secondary sealing assembly 44 includes a sealing half-ring 441. The inner wall of the protective half-ring 311 is adhered to the sealing half-ring 441. The cross-section of the sealing half-ring 441 is composed of multiple zigzag sections, which can tightly fit with the inner wall of the protective half-ring 311 and the outer walls of the reinforcing assembly 43, the male plug 21, and the female plug 22, thereby ensuring the sealing effect. At the same time, the zigzag sealing structure and the effectively extended sealing path can work with the primary sealing assembly 42 to further enhance the sealing effect. In addition, both the sealing ring 422 and the sealing half-ring 441 are made of elastic rubber material, so in addition to their sealing function, they can also buffer the radial pressure on the cable and enhance the pressure resistance.

[0048] It should be noted that, as Figure 5 and Figure 6 As shown, the joints of the male plug 21 and the female plug 22, the joints of the first and second pressure rings 431 and 432, and the joints of the two protective rings 311 are staggered along the axial direction of the cable body 1, thereby further enhancing the sealing effect.

[0049] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0050] In the description of this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0051] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0052] The above provides a detailed description of the pressure-resistant and flame-retardant cable provided by the present invention. For those skilled in the art, based on the ideas of the embodiments of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

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. 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.

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 1, 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.

6. The pressure-resistant and flame-retardant cable according to claim 1, characterized in that, The secondary 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.

7. 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.

8. A pressure-resistant and flame-retardant cable according to claim 2, 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.

Images