High-strength symmetric differential signal cable

Abstract

The utility model discloses a high-strength symmetrical differential signal cable, which aims to solve the technical problems that the cable has the capabilities of high-strength tensile strength and short-time flame jet resistance while meeting the signal transmission function, and the conductors are high-strength silver-plated copper alloy conductors, so that the breaking strength of the conductors is improved while the conduction of electric signals is ensured, and the service life of the conductors is prolonged. The insulating layer is formed by coating a fluoroplastic material, differential signal transmission is realized by virtue of the advantage of low dielectric strength of the material, the filling core is formed by stranding a PBO fiber material, the anti-fracture capability of the product can be greatly improved, the shielding layer is formed by weaving the PBO fiber material with high silver layer content at high density, so that the fiber layer has a conductive function, and the service life of the product is prolonged. The anti-breaking capacity of the product is further enhanced, the electromagnetic shielding function is achieved, the shielding requirement of differential signal transmission can be met in a certain length, and meanwhile the electromagnetic compatibility protection capacity is achieved.

Description

Technical Field

[0001] The utility model mainly serves in the aerospace field in environments such as flame propulsion devices and rapid launch deployment. It is widely applicable to rocket boosters, target missiles, airdrop traction and other equipment with signal transmission requirements, and faces large working tensile load requirements and withstands high-temperature flame spray for a short time. Specifically, it is a high-strength symmetrical differential signal cable. Background Art

[0002] Differential signal cables have been widely used in the aerospace field. Such cable structures usually use copper wires as signal transmission components, ordinary plastic materials as insulation layers and sheath layers, and copper wire braided structures as outer shielding. Although such products have the function of differential signal transmission, they are usually laid inside airborne or spacecraft for fixed laying and are not suitable for use in the external environment of airborne or spacecraft.

[0003] With the development of equipment in the aviation and aerospace fields, there are requirements for the current system equipment to be deployed and launched outside the aviation and aerospace equipment. Such equipment, such as rocket boosters, target missiles, airdrop traction, etc., are significantly affected by the tail flame of the spacecraft and the acceleration traction force during launch and operation. Traditional ordinary differential signal cables can no longer meet such working conditions. This patented product is proposed to meet the above requirements. Utility Model Content

[0004] The purpose of the utility model is to provide a high-strength symmetrical differential signal cable, and the technical problem to be solved is to provide a high-strength symmetrical differential signal cable that has the ability of high-strength tensile resistance and short-time flame spray resistance while meeting the signal transmission function.

[0005] To achieve the above object, the utility model provides the following technical solution: a high-strength symmetrical differential signal cable, comprising a conductor, the outer wall of the conductor is wrapped with an insulating layer, the outer wall of the insulating layer is twisted with a filling core, the outer wall of the filling core of the insulating layer is sleeved with a shielding layer, and the outer wall of the shielding layer is installed with a protective mechanism;

[0006] The protection mechanism comprises a sheath layer, a plurality of buffer holes are evenly opened inside the sheath layer, an isolation groove is opened inside the sheath layer, an isolation layer is fixedly connected to the inner wall of the sheath layer, and the isolation layer is sleeved on the outer wall of the shielding layer.

[0007] Preferably, the conductor is made of high-strength silver-plated copper alloy to improve the breaking strength of the conductor itself.

[0008] Preferably, the insulating layer is made of fluoroplastic material with high oxygen index, not easy to burn in air, high temperature resistance and high strength, so as to improve the breaking strength of the insulating layer itself and realize differential signal transmission by taking advantage of the low dielectric strength of the material itself.

[0009] Preferably, the filling core is made of PBO fiber material with large elastic modulus and high breaking strength.

[0010] Preferably, the outer wall of the shielding layer is made of PBO fiber material with a high silver content and is woven with high density.

[0011] Preferably, the isolation layer is made of fluoroplastic material with high oxygen index, not easy to burn in air, high temperature resistance and high strength, and takes advantage of the material itself that it can be processed into thin walls to achieve the functional characteristics of the overall small size of the product.

[0012] Preferably, a support mechanism is installed at the inner center of the insulating layer and the filling core, and the support mechanism includes a filling rod, and the outer wall of the filling rod is fixedly connected with a groove tube all around, the inner wall of the groove tube is slidably connected with a torsion spring, the outer side of the torsion spring is rotatably connected with an adapter, the outer wall of the adapter is fixedly connected with a support block, and the outer wall of the support block is buckled on the inner wall of the insulating layer and the filling core.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The conductor is made of high-strength silver-plated copper alloy conductor, which not only ensures the conduction of electrical signals, but also improves the breaking strength of the conductor itself. Compared with traditional ordinary copper conductors, the breaking force is increased by more than 2 times.

[0015] 2. The insulation layer is covered with fluoroplastic material with high oxygen index, high temperature resistance and high strength, which is not easy to burn in the air. The oxygen index is above 95, and it has the ability to not burn or continue to burn after being sprayed for 3s at 1200℃ flame. The differential signal transmission is realized by taking advantage of the low dielectric strength of the material itself.

[0016] 3. The filling core is made of PBO fiber material with large elastic modulus and high breaking force. The breaking force of PBO fiber is 1.5 to 2 times that of Kevlar fiber. Under the conditions of the same structure and size, it can greatly improve the product's anti-breaking ability.

[0017] 4. The shielding layer is made of PBO fiber material with high silver content and woven at high density. By coating the PBO fiber with a high silver content, the fiber layer has a conductive function. After being woven into a mesh with high density, the product's anti-breakage ability is further enhanced, and it also has an electromagnetic shielding function. It can meet the shielding requirements of differential signal transmission at a certain length, and at the same time has electromagnetic compatibility protection capabilities.

[0018] 5. It is coated with fluoroplastic material with high oxygen index, not easy to burn in the air, high temperature resistance and high strength. With the advantage of thin-wall processing of the material itself, the functional characteristics of the overall small size of the product are realized.

[0019] 6. The product achieves technical indicators of long-term working tensile force of 400kg, breaking force of 600kg, resistance to 1200℃ flame, 3s spray, and outer diameter less than 3mm. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the utility model;

[0021] Figure 2 for Figure 1 A schematic diagram of a front view connection structure;

[0022] Figure 3 for Figure 1 A schematic diagram of a side cross-sectional connection structure;

[0023] Figure 4 for Figure 3 Schematic diagram of the enlarged connection structure of the middle support mechanism.

[0024] In the figure: 1. conductor, 2. insulating layer, 3. filling core, 4. shielding layer, 5. protection mechanism, 501. sheath layer, 502. buffer hole, 503. isolation groove, 504. isolation layer, 6. supporting mechanism, 601. filling rod, 602. groove tube, 603. torsion spring, 604. adapter, 605. support block. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1-4 The utility model provides a technical solution: a high-strength symmetrical differential signal cable:

[0027] Embodiment 1:

[0028] The invention comprises a conductor 1, the outer wall of the conductor 1 is wrapped with an insulating layer 2, the conductor 1 is used to transmit signals, the insulating layer 2 is used to wrap the conductor 1, the outer wall of the insulating layer 2 is twisted with a filling core 3, the filling core 3 and the insulating layer 2 are twisted together, so as to improve the overall breaking strength of the conductor 1, the outer wall of the filling core 3 of the insulating layer 2 is sleeved with a shielding layer 4, the shielding layer 4 is used to protect the conductor 1 and the filling core 3, the outer wall of the shielding layer 4 is installed with a protective mechanism 5, and the protective mechanism 5 is used to protect the shielding layer 4;

[0029] The protection mechanism 5 includes a sheath layer 501, a plurality of buffer holes 502 are evenly opened inside the sheath layer 501, and the buffer holes 502 are used to buffer the impact force on the sheath layer 501. An isolation groove 503 is opened inside the sheath layer 501, and the isolation groove 503 is used to separate the isolation layer 504 and the sheath layer 501, so as to improve its fire resistance. The inner wall of the sheath layer 501 is fixedly connected with the isolation layer 504, and the isolation layer 504 is used to block the shielding layer 4. The isolation layer 504 is sleeved on the outer wall of the shielding layer. The conductor 1 is made of high-strength silver-plated copper alloy to improve the breaking strength of the conductor itself, and the insulation Layer 2 is made of fluoroplastic material with high oxygen index, not easy to burn in the air, high temperature resistance and high strength, so as to improve the breaking strength of the insulating layer itself, and realize differential signal transmission by virtue of the advantage of low dielectric strength of the material itself. The filling core 3 is made of PBO fiber material with large elastic modulus and high breaking force. The outer wall of the shielding layer 4 is made of PBO fiber material with high silver content and is woven with high density. The isolation layer 504 is made of fluoroplastic material with high oxygen index, not easy to burn in the air, high temperature resistance and high strength, and realizes the functional characteristics of overall small size of the product by virtue of the advantage of thin-wall processing of the material itself.

[0030] By providing the protection mechanism 5, the shielding layer 4 can be protected, and when the protection layer 501 is impacted, the impact force applied to the protection layer 501 can be buffered, and its high temperature resistance can be improved.

[0031] Embodiment 2:

[0032] On the basis of Example 1, a support mechanism 6 is installed at the inner center of the insulating layer 2 and the filling core 3, and the support mechanism 6 includes a filling rod 601, which is used to fix the groove tube 602. The outer wall of the filling rod 601 is fixedly connected with the groove tube 602. The groove tube 602 is used to support the bottom end of the torsion spring 603, and the bottom end of the torsion spring 603 can slide on the inner wall of the groove tube 602. The inner wall of the groove tube 602 is slidably connected with the torsion spring 603, and the torsion spring 603 is used to support the adapter 604. The outer side of the torsion spring 603 is rotatably connected with the adapter 604, and the adapter 604 is used to support the support block 605. The outer wall of the adapter 604 is fixedly connected with the support block 605. The support block 605 is used to support the inner wall of the insulating layer 2 and the filling core 3, and the outer wall of the support block 605 is buckled on the inner wall of the insulating layer 2 and the filling core 3.

[0033] By providing the supporting mechanism 6, the inner wall of the insulating layer 2 and the filling core 3 can be supported, and can be restored if displacement occurs when they are squeezed.

[0034] The detailed connection means are well-known in the art. The following mainly introduces the working principle and process. The specific work is as follows.

[0035] When the high-strength symmetrical differential signal cable is put into use, the insulating layer 2 is wrapped around the outer wall of the conductor 1, and then the user sets the filling rod 601 in the supporting mechanism 6 to the inner side of the inner wall of the insulating layer 2 and the filling core 3, and snaps the support block 605 onto the outer wall of the insulating layer 2 and the filling core 3, and then twists the conductor 1 wrapped with the insulating layer 2 and the filling core 3 together, and then integrates the shielding layer 4 into its outer wall, and then the isolation layer 504 in the protective mechanism 5 is sleeved onto the outer wall of the shielding layer 4.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-strength symmetrical differential signal cable, comprising a conductor (1), the outer wall of the conductor (1) is wrapped with an insulating layer (2), the outer wall of the insulating layer (2) is twisted with a filling core (3), and the outer wall of the filling core (3) of the insulating layer (2) is sleeved with a shielding layer (4), characterized in that: The outer wall of the shielding layer (4) is provided with a protection mechanism (5); The protective mechanism (5) comprises a sheath layer (501), a plurality of buffer holes (502) are evenly arranged inside the sheath layer (501), an isolation groove (503) is arranged inside the sheath layer (501), an isolation layer (504) is fixedly connected to the inner wall of the sheath layer (501), and the isolation layer (504) is sleeved on the outer wall of the shielding layer.

2. A high-strength symmetrical differential signal cable according to claim 1, characterized in that: The conductor (1) is made of high-strength silver-plated copper alloy material, which improves the breaking strength of the conductor itself.

3. A high-strength symmetrical differential signal cable according to claim 2, characterized in that: The insulating layer (2) is made of fluoroplastic material with a high oxygen index, which is not easy to burn in the air, has a high temperature resistance and high strength, so as to improve the breaking strength of the insulating layer itself and realize differential signal transmission by taking advantage of the low dielectric strength of the material itself.

4. A high-strength symmetrical differential signal cable according to claim 3, characterized in that: The filling core (3) is made of twisted PBO fiber material with a large elastic modulus and high breaking strength.

5. A high-strength symmetrical differential signal cable according to claim 4, characterized in that: The outer wall of the shielding layer (4) is made of PBO fiber material with a high silver content and is woven at a high density.

6. A high-strength symmetrical differential signal cable according to claim 5, characterized in that: The isolation layer (504) is made of fluoroplastic material with a high oxygen index, which is not easy to burn in the air, has a high temperature resistance level and high strength, and takes advantage of the material itself that it can be processed into thin walls, thereby achieving the functional characteristics of the overall small size of the product.

7. The high-strength symmetrical differential signal cable according to claim 6, characterized in that: A support mechanism (6) is installed at the inner center of the insulating layer (2) and the filling core (3), and the support mechanism (6) comprises a filling rod (601), and the outer wall of the filling rod (601) is fixedly connected with a groove tube (602) on all sides, and the inner wall of the groove tube (602) is slidably connected with a torsion spring (603), and the outer side of the torsion spring (603) is rotatably connected with an adapter (604), and the outer wall of the adapter (604) is fixedly connected with a support block (605), and the outer wall of the support block (605) is buckled on the inner wall of the insulating layer (2) and the filling core (3).

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