CN216715558U

CN216715558U - High flame-retardant high-temperature-resistant nonmetal expansion joint

Info

Publication number: CN216715558U
Application number: CN202220122353.9U
Authority: CN
Inventors: 刘根喜; 叶吉祥
Original assignee: Jiangsu Baojinlai Pipeline Equipment Co ltd
Current assignee: Jiangsu Baojinlai Pipeline Equipment Co ltd
Priority date: 2022-01-17
Filing date: 2022-01-17
Publication date: 2022-06-10
Anticipated expiration: 2032-01-17

Abstract

The utility model relates to the technical field of expansion joints, in particular to a high-flame-retardant high-temperature-resistant nonmetal expansion joint which comprises an inner protection layer, wherein the front end and the rear end of the inner protection layer are fixedly connected with assembly rings, the side surfaces of the assembly rings are provided with threaded holes, the front side of the assembly ring at the rear side is fixedly connected with a limiting rod, and the front end of the limiting rod is movably inserted into the side surface of the assembly ring at the front side. Carry out the separation to outside flame through first flame retardant coating and second flame retardant coating in the present case, and there is the clearance between first flame retardant coating and the second flame retardant coating, can block stretching of flame, the fire-retardant yarn card of all cotton meets fire incombustible, from fire self-extinguishing, therefore the fire behaviour of device is better, block outside flame through first flame retardant coating and second flame retardant coating, block the temperature of outside through the heat insulating layer simultaneously, the coefficient of thermal conductivity of aerogel felt is low, can prevent effectively that outside temperature from conducting to the device inside, therefore the thermal-insulated high temperature resistance of device is better.

Description

High flame-retardant high-temperature-resistant nonmetal expansion joint

Technical Field

The utility model relates to the technical field of expansion joints, in particular to a nonmetal expansion joint.

Background

The non-metal expansion joint is characterized by that it can compensate axial direction, transverse direction and angular direction, has no thrust, can simplify support design, and is corrosion-resistant, high-temp. resistant, noise-reducing and vibration-reducing, specially is applicable to hot-air pipeline and smoke dust pipeline, and can be divided into straight tube type, compound type, angular type and square type.

The existing partial nonmetal expansion joint is made of a metal frame, a braided fabric and rubber, when exposed fire occurs, the braided fabric and the rubber are easily combusted together, and then the internal structure of the nonmetal expansion joint is damaged, so that the flame retardant property of the nonmetal expansion joint is poor, and when the expansion joint is burnt by the exposed fire, the heat outside the expansion joint can be quickly conducted to the inside of the expansion joint, so that the heat insulation and high temperature resistance of the expansion joint are poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a high-flame-retardant high-temperature-resistant nonmetal expansion joint to solve the problems of poor flame-retardant performance and poor heat-insulating and high-temperature-resistant performance of the nonmetal expansion joint in the background technology.

In order to achieve the purpose, the utility model provides the following technical scheme: the high-flame-retardant high-temperature-resistant nonmetal expansion joint comprises an inner protective layer, wherein assembly rings are fixedly connected to the front end and the rear end of the inner protective layer, threaded holes are formed in the side surface of each assembly ring, a limiting rod is fixedly connected to the front side of the assembly ring on the rear side, and the front end of the limiting rod is movably inserted into the side surface of the assembly ring on the front side;

the outside of interior sheath bonds and has the heat insulating layer, the outside on heat insulating layer bonds and has first flame retardant coating, two spring swing joint is passed through to relative one side of fitting ring, the side of spring and the outside overlap joint of first flame retardant coating, and the side overlap joint of spring has the second flame retardant coating, the outside of second flame retardant coating bonds and has the wearing layer.

Preferably, the inner protection layer is made of fluororubber.

Preferably, the material of the heat insulation layer is aerogel felt.

Preferably, the first fireproof layer and the second fireproof layer are made of all-cotton flame-retardant yarn clips, and aluminum foil layers are arranged on the outer sides of the first fireproof layer and the second fireproof layer.

Preferably, the wear-resistant layer is made of natural rubber, and nylon wires are arranged inside the wear-resistant layer.

Preferably, the number of the limiting rods is five, the five limiting rods are annularly distributed on the side face of the assembling ring at equal intervals, a check ring is fixedly connected to the front end of each limiting rod, and the rear side of each check ring is in lap joint with the front side of the front-side assembling ring.

Compared with the prior art, the utility model has the beneficial effects that:

according to the utility model, the first fireproof layer and the second fireproof layer are used for blocking external flame, and a gap is formed between the first fireproof layer and the second fireproof layer, so that the spread of flame can be blocked, and the all-cotton flame-retardant yarn clamp is non-combustible when meeting fire and self-extinguishes when leaving fire, so that the flame-retardant performance of the device is better.

According to the aerogel felt, the first fireproof layer and the second fireproof layer are used for blocking external flames, the heat insulation layer is used for blocking external temperature, the thermal conductivity coefficient of the aerogel felt is low, external temperature can be effectively prevented from being conducted into the device, and therefore the device is better in heat insulation and high temperature resistance.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a partial perspective sectional view of the present invention;

fig. 3 is a sectional view of a partial three-dimensional structure of the present invention.

In the figure: 1. an inner protective layer; 2. assembling a ring; 3. a threaded hole; 4. a limiting rod; 5. a thermal insulation layer; 6. a first fire resistant layer; 7. a spring; 8. a second fire-resistant layer; 9. a wear layer; 10. and a retainer ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

Referring to fig. 1 to 3, the present invention provides a technical solution: the high-flame-retardant high-temperature-resistant nonmetal expansion joint comprises an inner protection layer 1, wherein the front end and the rear end of the inner protection layer 1 are fixedly connected with an assembly ring 2, the side surface of the assembly ring 2 is provided with a threaded hole 3, the front side of the rear side assembly ring 2 is fixedly connected with a limiting rod 4, and the front end of the limiting rod 4 is movably inserted with the side surface of the front side assembly ring 2;

the outer side of the inner protection layer 1 is bonded with a heat insulation layer 5, external flames are blocked through a first fireproof layer 6 and a second fireproof layer 8, meanwhile, the external temperature is blocked through the heat insulation layer 5, the heat conductivity coefficient of the aerogel felt is low, the external temperature can be effectively prevented from being conducted to the inside of the device, therefore, the heat insulation performance of the device is better, the first fireproof layer 6 is bonded on the outer side of the heat insulation layer 5, the opposite sides of the two assembling rings 2 are movably connected through a spring 7, the side face of the spring 7 is in lap joint with the outer side of the first fireproof layer 6, the side face of the spring 7 is in lap joint with the second fireproof layer 8, the external flames are blocked through the first fireproof layer 6 and the second fireproof layer 8, a gap exists between the first fireproof layer 6 and the second fireproof layer 8, the spreading of flames can be blocked, the all-cotton flame-retardant yarn clamp is incombustible when encountering the flames and is self-extinguished when leaving the flames, therefore, the flame retardant performance of the device is better, and a wear-resistant layer 9 is adhered to the outer side of the second fireproof layer 8.

In this embodiment, as shown in fig. 1, fig. 2, and fig. 3, the inner sheath layer 1 is made of fluororubber, which has good heat resistance, oxidation resistance, oil resistance, corrosion resistance, and atmospheric aging resistance, and has elasticity.

In this embodiment, as shown in fig. 2 and 3, the thermal insulation layer 5 is made of aerogel felt, the aerogel felt is a flexible thermal insulation felt formed by combining nano silica or metal aerogel as a main material with carbon fiber or ceramic glass fiber cotton or pre-oxidized fiber felt through a special process, and the aerogel felt has a low thermal conductivity and ensures the thermal insulation performance of the device.

In this embodiment, as shown in fig. 2 and 3, first flame retardant coating 6 is the fire-retardant yarn card of all cotton with the material of second flame retardant coating 8, and first flame retardant coating 6 all is provided with the aluminium foil layer with the outside of second flame retardant coating 8, the fire-retardant yarn card of all cotton meets fire incombustible, from fire self-extinguishing, and the fire-retardant yarn card of all cotton is nontoxic, the free from extraneous odour is amazing, can effectively prevent stretching of flame through the fire-retardant yarn card of all cotton, and then prevent that flame from causing the damage to device inner structure, and can play good anti-heat radiation function through the aluminium foil layer of outside.

In this embodiment, like fig. 1, fig. 2 and fig. 3, the material of wearing layer 9 is natural rubber, and the inside of wearing layer 9 is provided with the nylon yarn, and natural rubber has good wear resistance after the vulcanization to carry out the secondary through the nylon yarn to natural rubber's wear resistance and strengthen, and then increase the life of device.

In this embodiment, as shown in fig. 1, 2 and 3, the number of the limiting rods 4 is five, the five limiting rods 4 are annularly distributed on the side surface of the assembly ring 2 at equal intervals, the front end of the limiting rod 4 is fixedly connected with a retaining ring 10, the rear side of the retaining ring 10 is overlapped with the front side of the front assembly ring 2, the limiting rod 4 prevents the device from being twisted and deformed, and the retaining ring 10 prevents the front assembly ring 2 from being separated from the rear assembly ring.

The foregoing shows and describes the general principles, essential features, and advantages of the utility model. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a high fire-retardant high temperature resistant nonmetal expansion joint, includes interior sheath (1), its characterized in that: the front end and the rear end of the inner protection layer (1) are fixedly connected with assembly rings (2), the side surfaces of the assembly rings (2) are provided with threaded holes (3), the front side of the assembly ring (2) at the rear side is fixedly connected with a limiting rod (4), and the front end of the limiting rod (4) is movably inserted with the side surface of the assembly ring (2) at the front side;

the outside of interior sheath (1) bonds and has heat-insulating layer (5), the outside of heat-insulating layer (5) bonds and has first flame retardant coating (6), two spring (7) swing joint is passed through to relative one side of collar (2), the side of spring (7) and the outside overlap joint of first flame retardant coating (6), and the side overlap joint of spring (7) has second flame retardant coating (8), the outside of second flame retardant coating (8) bonds and has wearing layer (9).

2. The high flame retardant and high temperature resistant non-metallic expansion joint of claim 1, wherein: the inner protection layer (1) is made of fluororubber.

3. The high flame retardant and high temperature resistant non-metallic expansion joint of claim 1, wherein: the heat insulation layer (5) is made of aerogel felt.

4. The high flame retardant and high temperature resistant non-metallic expansion joint of claim 1, wherein: the material of first flame retardant coating (6) and second flame retardant coating (8) is the fire-retardant yarn card of all cotton, and the outside of first flame retardant coating (6) and second flame retardant coating (8) all is provided with the aluminium foil layer.

5. The high flame retardant and high temperature resistant non-metallic expansion joint of claim 1, wherein: the wear-resistant layer (9) is made of natural rubber, and nylon wires are arranged inside the wear-resistant layer (9).

6. The high flame retardant and high temperature resistant non-metallic expansion joint of claim 1, wherein: the quantity of gag lever post (4) is five, five gag lever post (4) equidistance is cyclic annular distribution in the side of assembly ring (2), and the front end fixedly connected with retaining ring (10) of gag lever post (4), the rear side of retaining ring (10) and the front side overlap joint of front side assembly ring (2).