High-frequency signal transmission cable suitable for medical equipment

Abstract

The utility model discloses a high-frequency signal transmission cable suitable for medical equipment, which comprises a central conductor, a plurality of twisted-pair cables are distributed on the outer side of the central conductor at equal intervals, each twisted-pair cable comprises two cable cores and an inner protective layer arranged outside the cable cores, the inner protective layer comprises an inner insulating layer, a connecting layer and an inner shielding layer, and the inner insulating layer is arranged outside the connecting layer. The twisted-pair cable is arranged in the filling layer, and the outer side of the filling layer is provided with the fireproof layer and the outer protection layer. The cable is scientific and reasonable in structural design, each pair of twisted-pair cables adopts an aluminum foil and metal braided shielding structure, the anti-interference capability of wire signal transmission is effectively improved, and the middle gap of the cable is filled with high-strength aramid yarns, so that the mechanical strength of the cable is enhanced in the installation and use process of the cable, and the service life of the cable is prolonged. And meanwhile, the outer layer of the sheath adopts high-strength aramid yarn woven shielding, so that the bending performance of the wire rod can be effectively improved, and the service life of the wire rod can be better prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of cable equipment, in particular to a high-frequency signal transmission cable suitable for medical equipment. Background Art

[0002] At present, there are many types of signal transmission cables suitable for medical equipment in China, but the signal transmission is unstable and the service life is not long. The market particularly needs a high-frequency signal transmission cable suitable for medical equipment to solve the above problems. To this end, we propose a high-frequency signal transmission cable suitable for medical equipment. Utility Model Content

[0003] The purpose of the utility model is to provide a high-frequency signal transmission cable suitable for medical equipment to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-frequency signal transmission cable suitable for medical equipment, comprising a central conductor, a plurality of twisted-pair cables are equidistantly distributed on the outside of the central conductor, the twisted-pair cables comprise two cable cores and an inner protective layer arranged outside the cable cores, the inner protective layer comprises an inner insulating layer, a connecting layer and an inner shielding layer, the twisted-pair cables are arranged in a filling layer, and a fireproof layer and an outer protective layer are arranged on the outside of the filling layer.

[0005] In the above solution, a plurality of aramid filaments are arranged in the filling layer.

[0006] In the above solution, the inner shielding layer is a metal braided shielding layer.

[0007] In the above scheme, the central conductor is formed by twisting six types of multi-stranded alloy conductors.

[0008] In the above solution, the inner insulating layer includes three layers of co-extruded skin-foam skin.

[0009] In the above solution, the fireproof layer is a mica layer.

[0010] In the above solution, the outer protective layer is made of high-strength aramid yarns cross-woven.

[0011] Compared with the prior art, the beneficial effects of the utility model are: this type of cable is suitable for high-frequency signal transmission of medical equipment, the structural design is simple and reasonable, and it has strong practicality. Each pair of twisted-pair cables adopts aluminum foil and metal braided shielding structure, which effectively improves the anti-interference ability of wire signal transmission. The middle gap of the cable is filled with high-strength aramid wire to ensure that the mechanical strength of the cable is enhanced during installation and use. At the same time, the outer layer of the sheath adopts high-strength aramid wire braided shielding, which can effectively increase the bending performance of the wire and better improve the service life of the wire. Compared with the prior art, this technology has good electrical and mechanical properties, while ensuring the high-frequency signal transmission performance of the product, with a relatively simple structure and good performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model.

[0013] Figure 2 This is a schematic diagram of the structure of a twisted-pair cable of the utility model.

[0014] In the figure: 1, central conductor 11, twisted pair cable 12, cable core 13, inner protective layer 131, inner insulating layer 132, connecting layer 133, inner shielding layer 14, filling layer 15, aramid yarn 16, fireproof layer 17, outer protective layer. DETAILED DESCRIPTION

[0015] 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.

[0016] See also Figure 1-2 The utility model provides a technical solution: a high-frequency signal transmission cable suitable for medical equipment, comprising a central conductor 1, a plurality of twisted-pair cables 11 are equidistantly distributed on the outside of the central conductor 1, the twisted-pair cable 11 comprises two cable cores 12 and an inner protective layer 13 arranged outside the cable core 12, the inner protective layer 13 comprises an inner insulating layer 131, a connecting layer 132 and an inner shielding layer 133, the twisted-pair cable 11 is arranged in a filling layer 14, and a fireproof layer 16 and an outer protective layer 17 are arranged on the outside of the filling layer 14.

[0017] Each pair of twisted-pair cables uses an aluminum foil and metal braided shielding structure to effectively improve the anti-interference ability of the wire signal transmission. The middle gap of the cable is filled with high-strength aramid silk to ensure that the mechanical strength of the cable is enhanced during installation and use. At the same time, the outer layer of the sheath is braided with high-strength aramid silk to effectively increase the bending performance of the wire and better improve the service life of the wire. Compared with the existing technology, this technology has good electrical and mechanical properties, while ensuring the product's high-frequency signal transmission performance, with a simple structure and good performance.

[0018] In the above solution, a plurality of aramid yarns 15 are arranged in the filling layer 14 .

[0019] In the above solution, the inner shielding layer 133 is a metal braided shielding layer. The inner diameter of the double-core shielding layer in the cable is ≤2.0mm, and it adopts super soft alloy monofilament shielding, with a shielding rate of more than 90%.

[0020] In the above scheme, the central conductor 1 is made of six types of multi-stranded alloy conductors. The outer core of the signal transmission cable is made of polyolefin material, and the conductor with a diameter of 0.80mm is made of 7-stranded soft C conductor. The conductor and shielding are made of alloy soft conductor, which not only has good electrical properties, but also has a shielding rate of more than 95% to effectively prevent external electromagnetic interference.

[0021] In the above scheme, the inner insulating layer 131 comprises three layers of co-extruded skin foam. The cable insulation adopts three layers of co-extruded skin foam, and the average insulation thickness reaches 0.25mm, and the electrical performance (capacitance, insulation resistance, impedance) can also meet the test requirements.

[0022] In the above solution, the fireproof layer 16 is a mica layer. The design of the mica layer fully improves the fireproof performance of the cable.

[0023] In the above solution, the outer protective layer 17 is made of high-strength aramid yarn cross-woven. The outer sheath protective layer of the signal transmission cable is made of high-strength aramid yarn cross-woven, and the shielding density is 95%.

[0024] The high-frequency signal transmission cable suitable for medical equipment made by the above scheme not only has a line pair impedance of 120±10Ω, but also a stable capacitance of 60pf / m. In order to facilitate the signal transmission distance, each pair of high-frequency cables inside is double-shielded with aluminum foil and metal wire to increase the anti-interference performance.

[0025] The insulation layer and sheath are special modified materials, whose main function is to ensure that the cable has good electrical and mechanical properties before and after high temperature resistance, and to ensure no current leakage. It mainly adopts physical nitrogen foaming mode (skin-foam-skin structure) to effectively reduce attenuation and stabilize product impedance value.

[0026] The inner layer is a special oil-resistant medical grade thermoplastic elastomer. This material has good softness, good self-lubrication, good fatigue resistance, and elasticity in a wide range of temperature and humidity; at the same time, it has good solvent resistance, and can resist hydrocarbons, alcohols, aldehydes, ethers, gasoline, lubricating oils and weak alkalis, etc., and can maintain considerable chemical stability at a high temperature of 125 degrees. It has low water absorption and good dimensional stability. Its main function is to ensure that the cable surface is not damaged during the installation process, effectively resist external radial pressure, and prevent water and other chemicals from entering to ensure product quality. The cable's structural design from the inside to the outside meets the product characteristics of industrial control equipment mobility, long service life, and high flame retardancy.

[0027] Working principle:

[0028] This type of cable is suitable for high-frequency signal transmission of medical equipment, mainly including a central conductor 1 and a plurality of twisted pair cables 11 equidistantly distributed on the outside thereof, and an inner protective layer 13 composed of an inner insulating layer 131, a connecting layer 132 and an inner shielding layer 133 is arranged on the outside of the twisted pair cable 11 to form a protective effect, a fireproof layer 16 and an outer protective layer 17 are arranged on the outside of the filling layer 14, which effectively improves the anti-interference ability of the wire signal transmission, and the middle gap of the cable is filled with high-strength aramid yarn 15 to ensure that the mechanical strength of the cable is enhanced during installation and use. At the same time, the outer protective layer is shielded by high-strength aramid yarn weaving, which can effectively increase the bending performance of the wire and better improve the service life of the wire. Compared with the prior art, this technology has good electrical and mechanical properties, while ensuring the high-frequency signal transmission performance of the product, with a simple structure and good performance, which ensures the stability requirements of high-frequency signal transmission of medical equipment.

[0029] 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-frequency signal transmission cable suitable for medical equipment, comprising a central conductor (1), characterized in that: A plurality of twisted-pair cables (11) are equidistantly distributed outside the central conductor (1), the twisted-pair cables (11) comprising two cable cores (12) and an inner protective layer (13) arranged outside the cable cores (12), the inner protective layer (13) comprising an inner insulating layer (131), a connecting layer (132) and an inner shielding layer (133), the twisted-pair cables (11) are arranged inside a filling layer (14), and a fireproof layer (16) and an outer protective layer (17) are arranged outside the filling layer (14).

2. A high-frequency signal transmission cable suitable for medical equipment according to claim 1, characterized in that: A plurality of aramid yarns (15) are arranged in the filling layer (14).

3. A high-frequency signal transmission cable suitable for medical equipment according to claim 1, characterized in that: The inner shielding layer (133) is a metal braided shielding layer.

4. A high-frequency signal transmission cable suitable for medical equipment according to claim 1, characterized in that: The central conductor (1) is formed by twisting six types of multi-stranded alloy conductors.

5. The high-frequency signal transmission cable suitable for medical equipment according to claim 1, characterized in that: The inner insulating layer (131) comprises three layers of co-extruded skin-foam-skin.

6. A high-frequency signal transmission cable suitable for medical equipment according to claim 1, characterized in that: The fireproof layer (16) is a mica layer.

7. The high-frequency signal transmission cable suitable for medical equipment according to claim 1, characterized in that: The outer protective layer (17) is made of high-strength aramid yarns cross-woven.

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