Low-smoke halogen-free PVC (polyvinyl chloride) sheath material

Abstract

The utility model discloses a low-smoke halogen-free PVC sheath material, which comprises a reinforcing pipe sleeve, an insulating pipe sleeve is arranged in the reinforcing pipe sleeve, the reinforcing pipe sleeve and the insulating pipe sleeve are both made of low-halogen polyvinyl chloride materials, a flexible filling pipe sleeve is fixedly connected between the insulating pipe sleeve and the reinforcing pipe sleeve, and the insulating pipe sleeve and the reinforcing pipe sleeve are both made of low-halogen polyvinyl chloride materials. The outer surface of the insulation pipe sleeve is fixedly connected with an external protection pipe sleeve, the surface of the external protection pipe sleeve is provided with a plurality of annular flame-retardant grooves and two strip-shaped flame-retardant grooves, and the two strip-shaped flame-retardant grooves are oppositely distributed front and back. By means of the device, the negative influence caused by combustion of the PVC sheath material is reduced, and meanwhile the influence of ultraviolet rays on the PVC sheath material is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of PVC sheath materials, in particular to a low-smoke and halogen-free PVC sheath material. Background Art

[0002] PVC (polyvinyl chloride) material is commonly used to manufacture cable outer sheaths today, and general PVC sheaths contain a large amount of halogen. Although halogen improves the flame retardant properties of PVC sheaths, harmful gases will be produced when the PVC sheaths burn, resulting in reduced practicality of the PVC sheaths. The "low-smoke halogen-free environmentally friendly flame-retardant cable" disclosed on the China Patent Network has an application number of "201120022516.8". The PVC sheath uses hydrotalcite as a flame retardant for the cable sheath to reduce the negative impact of the burning of the PVC sheath. However, the PVC sheath is affected by ultraviolet rays during use, and the PVC sheath will age and its appearance will be damaged, resulting in a shortened service life of the PVC sheath. Utility Model Content

[0003] The purpose of the utility model is to solve at least one of the technical problems existing in the prior art and to provide a low-smoke and halogen-free PVC sheath material. When the PVC sheath material is in use, the smoke and harmful substances generated when the sheath material is burned are reduced, and the PVC sheath material is ensured to have sufficient flame retardant ability, while reducing the influence of ultraviolet rays on the PVC sheath material and extending the service life of the PVC sheath.

[0004] The utility model also provides the above-mentioned low-smoke zero-halogen PVC sheath material, including: a reinforcement sleeve, an insulating sleeve is arranged inside the reinforcement sleeve, the reinforcement sleeve and the insulating sleeve are both made of low-halogen polyvinyl chloride material, a flexible filling sleeve is fixedly connected between the insulating sleeve and the reinforcement sleeve, an external protection sleeve is fixedly connected to the outer surface of the insulating sleeve, and a plurality of annular flame-retardant grooves and two strip flame-retardant grooves are arranged on the surface of the external protection sleeve, and the two strip flame-retardant grooves are relatively distributed front and back.

[0005] According to the low-smoke zero-halogen PVC sheath material of the utility model, the external protective tube sleeve is composed of a composite material made of low-halogen polyvinyl chloride, aminotriethanol and ultraviolet absorber. Through the above device, weather resistance is improved.

[0006] According to the low-smoke halogen-free PVC sheath material of the utility model, the surface of the external protective tube sleeve is provided with an organic pigment coating. Through the above device, the influence of ultraviolet rays on the PVC sheath material is further reduced.

[0007] According to the low-smoke halogen-free PVC sheath material of the utility model, a fluororubber ring is fixedly connected inside the annular flame-retardant groove, and the fluororubber ring completely fills the annular flame-retardant groove. Through the above device, dust is prevented from entering the annular flame-retardant groove.

[0008] According to the low-smoke halogen-free PVC sheath material described in the utility model, the surface of the external protective tube sleeve is provided with a smooth section, and the upper end of the smooth section penetrates into the interior of the strip-shaped flame-retardant groove. Through the above device, dust is prevented from accumulating inside the strip-shaped flame-retardant groove.

[0009] According to the low-smoke zero-halogen PVC sheath material of the utility model, the smooth section is in an inclined state from bottom to top, and the smooth section cooperates with the strip-shaped flame-retardant groove to form a guide mechanism. Through the above device, the effect of preventing dust accumulation is further improved.

[0010] According to the low-smoke zero-halogen PVC sheath material of the utility model, the flexible filling sleeve is made of polyurethane foam material, and the length of the flexible filling sleeve is greater than the length of the reinforcement sleeve. Through the above device, the impact resistance of the PVC sheath material is improved.

[0011] According to the low-smoke zero-halogen PVC sheath material described in the utility model, the portion of the flexible filling sleeve close to the reinforcement sleeve is provided with a plurality of grooves, and the grooves cooperate with the inner wall of the reinforcement sleeve to form a heat dissipation cavity. Through the above structure, the heat dissipation effect of the PVC sheath material is improved.

[0012] Beneficial Effects

[0013] 1. Compared with the prior art, this low-smoke halogen-free PVC sheath material reduces the negative effects of PVC sheath material combustion and reduces the impact of ultraviolet rays on PVC sheath material through an external protective tube sleeve, an organic pigment coating, annular flame-retardant grooves, and strip flame-retardant grooves.

[0014] 2. Compared with the prior art, this low-smoke halogen-free PVC sheath material ensures that the PVC sheath material has sufficient flame retardant effect and avoids the accumulation of a large amount of dust and impurities on the surface of the PVC sheath material through annular flame retardant grooves, strip flame retardant grooves, fluororubber rings, and smooth cross-sections. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0016] Figure 1 This is a top view of the winding structure of a low-smoke halogen-free PVC sheath material of the utility model;

[0017] Figure 2 This is a bottom-up structural diagram of a low-smoke, halogen-free PVC sheath material in a winding state according to the utility model;

[0018] Figure 3 This is a cross-sectional structural diagram of a low-smoke, halogen-free PVC sheath material in a winding state according to the utility model;

[0019] Figure 4 This utility model is a low-smoke halogen-free PVC sheath material Figure 3 Enlarged structural diagram at point B in the middle.

[0020] Legend:

[0021] 1. Reinforced sleeve; 2. Insulated sleeve; 3. Flexible filling sleeve; 4. External protective sleeve; 5. Annular flame retardant groove; 6. Strip flame retardant groove; 7. Fluororubber ring; 8. Organic pigment coating; 9. Smooth section; 10. Groove. DETAILED DESCRIPTION

[0022] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0023] Reference Figure 1-4 The utility model embodiment provides a low-smoke halogen-free PVC sheath material, which includes: a reinforcement sleeve 1, an insulating sleeve 2 is arranged inside the reinforcement sleeve 1, the reinforcement sleeve 1 and the insulating sleeve 2 are both made of low-halogen polyvinyl chloride material, a flexible filling sleeve 3 is fixedly connected between the insulating sleeve 2 and the reinforcement sleeve 1, and an external protective sleeve 4 is fixedly connected to the outer surface of the insulating sleeve 2. The external protective sleeve 4 is composed of a composite material made of low-halogen polyvinyl chloride, aminotriethanol and ultraviolet absorber. The above devices cooperate with each other to reduce the halogen contained in the PVC sheath material and reduce the negative impact of the combustion of the PVC sheath material, while aminotriethanol Alcohol is a non-halogen flame retardant material. When the PVC sheath material burns, it releases gases such as ammonia, which react chemically with harmful gases produced by the combustion to reduce the release of harmful gases. At the same time, phosphorus oxides are generated to form a phosphorus compound layer to isolate oxygen and achieve a flame retardant effect. The ultraviolet absorber can reduce the impact of ultraviolet rays on the PVC sheath material. The surface of the external protective tube sleeve 4 is provided with an organic pigment coating 8. The organic pigment coating 8 can form a protective film to increase the wear resistance and durability of the PVC sheath material. At the same time, the organic pigment has the characteristic of absorbing ultraviolet rays, which can protect the PVC sheath material from damage by ultraviolet rays to a certain extent.

[0024] The flexible filling sleeve 3 is made of polyurethane foam material, and the length of the flexible filling sleeve 3 is greater than that of the reinforcement sleeve 1. The polyurethane foam has good softness and cushioning properties, and is filled between the reinforcement sleeve 1 and the insulating sleeve 2 to play a shock absorbing and supporting role. The part of the flexible filling sleeve 3 close to the reinforcement sleeve 1 is provided with a plurality of grooves 10, and the grooves 10 cooperate with the inner wall of the reinforcement sleeve 1 to form a heat dissipation cavity. The grooves 10 increase the overall flexibility of the PVC sheath material, while reducing the weight of the PVC sheath material and improving the heat dissipation performance of the PVC sheath when it is in action.

[0025] The surface of the external protective tube sleeve 4 is provided with multiple annular flame retardant grooves 5 and two strip flame retardant grooves 6. The two strip flame retardant grooves 6 are relatively distributed front and back. The existence of the annular flame retardant grooves 5 and the strip flame retardant grooves 6 can increase the surface area of ​​the material, improve the flame retardant effect, reduce the degree of combustion during fire, and at the same time improve the anti-slip effect of the PVC sheath material. The inside of the annular flame retardant groove 5 is fixedly connected with a fluororubber ring 7, which completely fills the annular flame retardant groove 5. The fluororubber ring 7 prevents dust from accumulating on the inner wall of the annular flame retardant groove 5. The surface of the external protective tube sleeve 4 is provided with a smooth section 9. The upper end of the smooth section 9 passes through the inside of the strip flame retardant groove 6. The smooth section 9 is in an inclined state from bottom to top. The smooth section 9 cooperates with the strip flame retardant groove 6 to form a guide mechanism. The smooth section 9 reduces the support effect of dust in the strip flame retardant groove 6 and prevents dust from accumulating inside the strip flame retardant groove 6.

[0026] Working principle: the aminotriethanol and ultraviolet absorber contained in the external protective tube sleeve 4 and the annular flame retardant groove 5 and the strip flame retardant groove 6 can improve the flame retardant properties of the PVC sheath material and reduce the influence of ultraviolet rays on the PVC sheath material. The fluororubber ring 7 is an elastic material with excellent high temperature resistance, chemical corrosion resistance and flame retardant properties, which further improves the flame retardant effect of the PVC sheath material, thereby ensuring that after the halogen content of the PVC sheath material is reduced, the PVC sheath material still has sufficient flame retardant properties, and the inclined structure of the smooth section 9 cooperates with the strip flame retardant groove 6 to prevent dust from accumulating inside the strip flame retardant groove 6.

[0027] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A low-smoke halogen-free PVC sheath material, characterized in that: include: A reinforcement sleeve (1), wherein an insulating sleeve (2) is arranged inside the reinforcement sleeve (1), wherein both the reinforcement sleeve (1) and the insulating sleeve (2) are made of low-halogen polyvinyl chloride material, a flexible filling sleeve (3) is fixedly connected between the insulating sleeve (2) and the reinforcement sleeve (1), an external protective sleeve (4) is fixedly connected to the outer surface of the insulating sleeve (2), and a plurality of annular flame-retardant grooves (5) and two strip-shaped flame-retardant grooves (6) are arranged on the surface of the external protective sleeve (4), and the two strip-shaped flame-retardant grooves (6) are arranged relatively front to back.

2. The low-smoke halogen-free PVC sheath material according to claim 1, characterized in that: The surface of the external protective tube sleeve (4) is provided with an organic pigment coating (8).

3. The low-smoke halogen-free PVC sheath material according to claim 1, characterized in that: A fluororubber ring (7) is fixedly connected to the interior of the annular flame-retardant groove (5), and the fluororubber ring (7) completely fills the annular flame-retardant groove (5).

4. The low-smoke halogen-free PVC sheath material according to claim 1, characterized in that: The surface of the external protective tube sleeve (4) is provided with a smooth section (9), and the upper end of the smooth section (9) penetrates into the interior of the strip-shaped flame-retardant groove (6).

5. The low-smoke zero-halogen PVC sheath material according to claim 4, characterized in that: The smooth cross section (9) is in an inclined state from bottom to top, and the smooth cross section (9) cooperates with the strip-shaped flame-retardant groove (6) to form a flow guide mechanism.

6. The low-smoke halogen-free PVC sheath material according to claim 1, characterized in that: The flexible filling sleeve (3) is made of polyurethane foam material, and the length of the flexible filling sleeve (3) is greater than the length of the reinforcement sleeve (1).

7. The low-smoke halogen-free PVC sheath material according to claim 1, characterized in that: A portion of the flexible filling sleeve (3) close to the reinforcement sleeve (1) is provided with a plurality of grooves (10), and the grooves (10) cooperate with the inner wall of the reinforcement sleeve (1) to form a heat dissipation cavity.

Images