Adsorption sealing pipe

Abstract

The utility model provides an adsorption sealing pipe which is provided with a supporting layer, a sealing layer and a sealing layer, the supporting layer is provided with a discharge channel, and the discharge channel penetrates through the supporting layer; the adsorption layer is attached to the outer wall of the supporting layer and has an adsorption function; and a sealing layer disposed outside the adsorption layer.

Description

Technical Field

[0001] The utility model relates to the field of adsorption sealing tubes, in particular to a polymer composite adsorption sealing tube, which comprises: a support layer, the support layer is configured with a discharge channel, the discharge channel runs through the support layer; an adsorption layer, the adsorption layer is attached to the outer wall of the support layer and has an adsorption function; and a sealing layer, the sealing layer is arranged outside the adsorption layer. Background Art

[0002] Every winter, railway freight equipment faces severe challenges in safe use under extremely cold weather. In high-latitude areas with severe cold and large temperature differences between day and night, leakage failures caused by low temperatures often occur in railway vehicles, and leakage failures are mainly concentrated in the period from night to the next morning when the temperature is relatively low. When the temperature is below -30℃, the number of leakage failures increases significantly. Through inspection and analysis, it is known that the air source of the brake system contains moisture, which condenses in the pressure pipeline and then solidifies into ice, causing low-temperature freezing and causing the brake valve to leak. According to TB / T 3124 "Measurement Method for Quality Grade of Compressed Air for Locomotive and Vehicle Braking", the water content level of the air source of the brake system should be above level 3. When the drying effect of the air source device is poor, the air entering the brake system contains water vapor. When the temperature drops sharply, the precipitated water condenses inside the brake system, causing leakage of components such as the emergency valve. The failure of the brake valve on the pipe system when the water in the brake pipe system freezes due to low temperature has interfered with the normal driving organization and has had a significant impact on the winter freight order, which needs to be solved urgently.

[0003] At present, there is no good solution for the removal of water and water vapor in pressure pipelines, especially for the removal of water and water vapor in pressure pipelines of railway locomotives, passenger cars and freight cars. The compressed air generated by the locomotive air compressor will condense into water in the pressure pipelines of locomotives and vehicles due to temperature changes. The condensed water will enter various functional modules in the pipeline along with the compressed air and solidify into ice at low temperatures, causing failure of various functional parts and affecting driving safety. Utility Model Content

[0004] In this context, the utility model proposes a polymer composite adsorption sealing tube. The polymer composite adsorption sealing tube is obtained by combining the composite tube structure, the water-absorbing material adsorption technology, and the actual situation of the railway vehicle brake pressure pipeline. With the help of the adsorption sealing tube of the utility model, water droplets and water vapor in the pressure pipelines of railway locomotives, passenger cars, and freight cars can be effectively removed. It can also be used to remove moisture from other industrial pressure pipelines, so that machines and functional components can work normally under high temperature (200℃), low temperature (minus 50℃), and high pressure (1000KPa).

[0005] Specifically, the utility model proposes an adsorption sealing tube, which comprises: a support layer, which is configured with a discharge channel, which runs through the support layer; an adsorption layer, which is attached to the outer wall of the support layer and has an adsorption function; and a sealing layer, which is arranged outside the adsorption layer.

[0006] According to an embodiment of the utility model, the discharge channel is composed of a plurality of through holes, which are evenly distributed on the support layer; and / or, the discharge channel is composed of a plurality of through grooves, which are spirally constructed around the axial direction of the support layer.

[0007] According to an embodiment of the utility model, the through hole is circular with a diameter of 0.2 mm to 0.8 mm, wherein a plurality of through holes form a row and are arranged along the circumferential direction of the support layer, wherein adjacent through holes in a row of through holes are spaced apart at the same angle, wherein a plurality of rows of through holes are arranged along the axial direction of the support layer, wherein the through holes in adjacent rows are staggered at the same angle along the circumferential direction of the support layer and are spaced apart at the same distance along the axial direction of the support layer; and / or each of the grooves is spirally rotated 360° around the axial direction of the support layer, wherein the width of the groove does not exceed 1 mm, wherein every two adjacent grooves in the groove are spaced apart at the same distance along the axial direction of the support layer; and / or the support layer is a non-metallic pipe resistant to pressurized gas having a temperature of -50°C to +200°C and a pressure of 10086Pa to 1000KPa.

[0008] According to an embodiment of the utility model, a retaining sleeve is provided at the end of the adsorption sealing tube, and the retaining sleeve is arranged inside the sealing layer and engaged with the sealing layer in a fluid-tight manner, wherein the support layer and the adsorption layer are retained on the retaining sleeve, thereby forming an annular gap between the adsorption layer and the sealing layer.

[0009] According to an embodiment of the utility model, the retaining sleeve is connected to the sealing layer in an interference fit manner, wherein at least one Y-shaped sealing ring is arranged on the outer wall of the retaining sleeve; or, the retaining sleeve is connected to the sealing layer in a threaded manner; or, the retaining sleeve is connected to the sealing layer in a shape fit manner, wherein at least one Y-shaped sealing ring is arranged on the outer wall of the retaining sleeve.

[0010] According to an embodiment of the utility model, the adsorption layer comprises: a substrate layer; a water-absorbing material layer, which is combined with one surface or multiple surfaces of the substrate layer; a covering layer, which covers the water-absorbing material layer, and the covering layer is combined with the water-absorbing material layer by bonding, coating, impregnation and / or hot melting.

[0011] According to an embodiment of the utility model, the adsorption layer further comprises an anti-corrosion layer, and the anti-corrosion layer is combined with the covering layer by bonding, coating or impregnation.

[0012] According to an embodiment of the utility model, the water-absorbing material layer is composed of one or both of a synthetic rubber water-absorbing material layer and a polymer water-absorbing material layer.

[0013] According to an embodiment of the utility model, the polymer water-absorbing material layer is constructed of one of polyacrylamide, polyvinyl alcohol, polyacrylic acid salt, polyacrylate, and modified fiber; the covering layer contains any one of polyester staple fiber, polyester filament, viscose fiber, nylon staple fiber, nylon filament, aramid staple fiber, aramid filament, glass fiber staple fiber, and glass fiber filament, and is manufactured by any one of bonding, spunbonding, needle punching, weaving, and braiding production methods; and the anti-corrosion layer is processed from any one of a base material selected from glass fiber, film, non-woven fabric, fiber woven fabric, and cotton woven fabric.

[0014] According to an embodiment of the utility model, the adsorption sealing tube is arranged in an industrial or civil pressure pipeline, especially in an industrial pressure pipeline of a train, a locomotive, a passenger car, or a truck.

[0015] In general, with the help of the adsorption sealing tube of the utility model, water and water vapor in the pressure pipeline are removed, and the water vapor in the pipeline is prevented from forming water and ice after reaching the dew point temperature, affecting the various functional modules in the pipeline, ensuring the normal operation of various functional modules along the pressure pipeline, especially ensuring the normal function of locomotive, passenger car, and freight car brake valve products (120 valve, empty and loaded vehicle valve, F8 valve, JZ-7 valve, etc.), reducing the leakage risk of locomotive and vehicle pressure pipelines due to long-term water rust corrosion, improving the reliability and stability of the braking system, and playing a vital role in ensuring and maintaining the order and safety of railway transportation.

[0016] Specifically, the present invention can bring about many beneficial effects, including but not limited to the following aspects.

[0017] Improved braking performance: Water droplets and water vapor in the brake line can affect the transmission of the brake signal, resulting in poor braking effect. By removing these interfering factors, accurate transmission of the brake signal can be ensured, thereby reducing the risk of brake delay or failure. This will enable locomotives, passenger cars, and freight cars to respond to braking operations more quickly and accurately, improving the sensitivity and reliability of braking.

[0018] Enhanced system reliability: Water vapor can easily cause corrosion and damage, thereby increasing the possibility of brake system failure. The utility model can reduce this risk and make the brake system more stable and reliable. Even in harsh working environments, the brake system can maintain good working conditions and reduce downtime.

[0019] Ensure driving safety: A reliable braking system is an important guarantee for driving safety. Removing water droplets and water vapor can reduce the probability of accidents, ensure that locomotives, passenger cars, and trucks can brake in a timely and effective manner during driving, and avoid traffic accidents caused by brake failure.

[0020] Extend equipment life: Reducing the erosion of brake lines by water vapor can effectively extend the service life of the brake system and related equipment, avoiding the frequent replacement of equipment due to corrosion and damage.

[0021] Reduce maintenance costs: As the reliability of the braking system is improved, the frequency of fault repairs and equipment replacements is reduced, and the corresponding maintenance costs will also be reduced. For transportation companies, this can reduce operating costs and improve economic benefits.

[0022] Improve transportation efficiency: A stable braking system can ensure the normal operation of locomotives, passenger cars and freight cars, and reduce transportation delays caused by brake failures, thereby improving the efficiency of cargo transportation and ensuring that the cargo can arrive at the destination on time.

[0023] Enhanced adaptability: Whether in low temperature environment or humid climate conditions, or in other complex environments, the utility model can enable locomotives, passenger cars, and freight cars to maintain good braking performance. It enhances the adaptability of locomotives, passenger cars, and freight cars to different environments and ensures safe operation in various situations. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A three-dimensional partial cross-sectional view of an adsorption sealing tube according to an embodiment of the utility model is shown.

[0025] Figure 2A and Figure 2B A schematic diagram of a support layer according to an embodiment of the utility model is shown.

[0026] Figure 3 A schematic diagram of a support layer according to another embodiment of the utility model is shown.

[0027] Figure 4 A three-dimensional cross-sectional view of the adsorption sealing tube after assembly according to an embodiment of the utility model is shown. DETAILED DESCRIPTION

[0028] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0029] Figure 1A polymer composite adsorption sealing tube 1 is shown, which has a three-layer composite structure, which is a sealing layer 2, an adsorption layer 3 and a support layer 4 from the outside to the inside. In the embodiment of the utility model, the sealing layer 2, the adsorption layer 3 and the support layer 4 are all hollow cylinders, and the cross-section of the hollow cylinder can be, for example, a hollow triangle, a hollow square, a hollow rectangle, a hollow pentagon, a hollow hexagon, etc. In a preferred embodiment, the sealing layer 2, the adsorption layer 3 and the support layer 4 are hollow cylinders.

[0030] The sealing layer 2 is located at the outermost layer of the polymer composite adsorption sealing tube 1. According to one embodiment of the utility model, the material of the sealing layer 2 is stainless steel, thereby being able to constitute a stainless steel tube. In addition, the sealing layer 2 can also be constructed according to the standard requirements of other industrial pipelines. The sealing layer 2 is constructed to be fluid-tight, so that the fluid (for example, pressurized gas containing water) cannot pass through the sealing layer 2. The sealing layer 2 can prevent the adsorption layer 3, the support layer 4 and the transported pressurized gas from being affected by the external environment outside the sealing layer 2. In addition, the sealing layer 2 can prevent the transported pressurized gas from flowing out of the sealing layer 2.

[0031] The adsorption layer 3 is located between the sealing layer 2 and the support layer 4. According to a preferred embodiment of the present invention, the adsorption layer 3 has, for example, a substrate layer, a water-absorbing material layer, a covering layer and / or an anti-corrosion layer in order from the inside to the outside. The specific structure of the adsorption layer 3 is described in detail below.

[0032] According to an embodiment of the utility model, the water-absorbing material layer of the adsorption layer 3 is composed of, for example, a synthetic rubber water-absorbing material layer and a polymer water-absorbing material layer, or can also be a composite of the two. According to an embodiment of the utility model, the water-absorbing material of the polymer water-absorbing material layer is, for example, a polymer water-absorbing powder, a polymer water-absorbing fiber material, or a textile material made of a polymer water-absorbing fiber. The polymer water-absorbing material layer is compounded with one surface (for example, the outer surface) or multiple surfaces of the substrate layer by chemical adhesives or physical hot melt, acupuncture and other processes. According to an embodiment of the utility model, the synthetic rubber water-absorbing material layer can be made of, for example, synthetic rubbers such as butyl rubber and nitrile rubber by adding other polymer water-absorbing materials. The water-absorbing material layer can be combined with the substrate layer by various methods such as calendering, bonding, coating, impregnation, hot melt, acupuncture and the like.

[0033] The covering layer of the adsorption layer 3 is attached to one side of the water-absorbing material layer. The covering layer can be combined with the water-absorbing material layer and / or the anti-corrosion layer by bonding, coating, impregnation, hot melting and other methods. The covering layer is used, for example, to cover the water-absorbing material layer to prevent the material of the water-absorbing material layer from scattering. In one embodiment of the utility model, the adsorption layer 3 may not have a covering layer, but the water-absorbing material is directly compounded with the anti-corrosion layer; or the anti-corrosion layer may not be provided, but the water-absorbing material is directly compounded with the covering layer.

[0034] The anti-corrosion layer of the adsorption layer 3 is attached to one side of the water-absorbing material layer or one side of the covering layer. The anti-corrosion layer can be combined with the water-absorbing material layer or the covering layer by bonding, coating, impregnation and other methods. According to the embodiment of the utility model, the anti-corrosion layer can be processed from any substrate of glass fiber, film, non-woven fabric, fiber fabric, and cotton fabric. The anti-corrosion layer is used to protect the water-absorbing material layer or the covering layer to prevent the water-absorbing material layer or the covering layer from being affected by the pressure gas between the adsorption layer 3 and the sealing layer 2, especially from being corroded.

[0035] The polymer water-absorbing material layer can be constructed from one of polyacrylamide, polyvinyl alcohol, polyacrylic acid salt, polyacrylic acid ester, modified fiber or their copolymers or mixtures to form a water-absorbing swelling substance. The covering layer can be any one of polyester staple fiber, polyester filament, viscose fiber, nylon staple fiber, nylon filament, aramid staple fiber, aramid filament, glass fiber staple fiber, glass fiber filament, and can be manufactured by any one of bonding, spunbonding, needle punching, weaving, and knitting production methods.

[0036] A single-layer water-absorbing structure can be formed by a water-absorbing material layer and a covering layer, and a plurality of single-layer water-absorbing structures can form a multi-layer water-absorbing structure. The multi-layer water-absorbing structure is formed, for example, by winding or compounding a single-layer water-absorbing structure. This can further enhance the water absorption, corrosion resistance and high temperature resistance of the water-absorbing structure. Winding can be divided into transverse wrapping and longitudinal wrapping at different angles and sizes. Compounding can be any one of wet method, hot pressing, hot melting and laminating. The material used in this compounding operation can be any one of glass fiber, polyester, nylon and aramid.

[0037] The support layer 4 in the present invention is inside the adsorption layer 3. The adsorption layer 3 is attached to the support layer 4 by winding and compounding. The support layer 4 is used, for example, to support the adsorption layer 3 and guide the pressurized gas. The pressurized gas is usually a high-temperature, high-pressure gas. The material of the support layer 4 meets the following conditions: within the service life, the support layer 4 needs to be resistant to high and low temperatures (high temperature is, for example, at least 200°C, and low temperature is, for example, at least minus 50°C), the physical strength remains unchanged, it will not soften, it will not shrink, it will not chemically react with other layers and pressurized gases, and it has the strength to withstand high-pressure gas (for example, 10086Pa-1000KPa). In one embodiment of the present invention, the support layer 4 is, for example, a non-metallic pipe such as a glass fiber reinforced PBT pipe, a PEEK pipe, a nylon pipe, a glass fiber wound composite pipe, or the like.

[0038] Furthermore, the support layer 4 has drainage channels, by means of which moisture can be rapidly radially drained from the inner wall of the support layer 4 to the outside of the support layer 4 and then adsorbed by the adsorption layer 3 .

[0039] In one embodiment of the present invention, the discharge channel is composed of a plurality of through holes 41, and the through holes 41 are regular shapes such as circular, elliptical, triangular, square, rectangular, pentagonal, etc. In an alternative embodiment, the through holes 41 can also be irregular shapes. Figure 2A , Figure 2B In the preferred embodiment shown in , the support layer 4 has a pipe diameter of model DN32, the outer diameter D1 of the support layer 4 is 36 mm, the inner diameter D2 is 34 mm, and the length L is 1000 mm; the through hole 41 is circular; the diameter of the through hole 41 is 0.2 mm to 0.8 mm; the angle of the through hole 41 is: the axis of the through hole is perpendicular to the wall of the support layer 4 where the through hole 41 is located. The through holes 41 are arranged in such a way that: on a cross section of the support layer 4, 8 through holes 41 are evenly arranged around the periphery of the support layer 4, and the interval between two adjacent through holes 41 is 45°. In other words, the 8 through holes 41 constitute a row. Accordingly, the second row is spaced 10 mm apart from the first row along the axial direction of the support layer 4, and the second row is rotated 60° clockwise (or counterclockwise) relative to the first row around the axial direction of the support layer 4. Then the third row, the fourth row, etc. are arranged in sequence.

[0040] In an alternative embodiment (not shown), 16 through holes 41 form a row, and the interval between two adjacent through holes 41 is 22.5°. The second row is spaced 10 mm apart from the first row along the axial direction of the support layer 4, and the second row is rotated 30° clockwise (or counterclockwise) relative to the first row around the axial direction of the support layer 4. It is also conceivable that the through holes 41 can be evenly arranged in the support layer 4 in other ways. Through the through holes and arrangement scheme of the utility model, the moisture in the support layer 4 can be quickly discharged through capillary action without reducing the strength of the support layer 4. In other words, through the discontinuous linear and multi-angle arrangement of the through holes 41 of the support layer 4, it is ensured that condensed water in any part of the support layer 4 can be quickly discharged.

[0041] exist Figure 3 In the alternative embodiment shown in , the discharge channel is composed of a plurality of spiral grooves 42, which penetrate the support layer 4. In a preferred embodiment, the grooves 42 are formed by spirally rotating 360° around the axial direction of the support layer 4, the width of the grooves 42 does not exceed 1 mm, and two adjacent grooves 42 are spaced 10 mm apart along the axial direction of the support layer 4. In this embodiment, through the grooves 42 and the arrangement scheme, the moisture in the support layer 4 can be quickly discharged through capillary action without reducing the strength of the support layer 4.

[0042] Figure 4The cross-sectional view of the assembled adsorption sealing tube 1 is shown. In the assembled state, there is an annular gap 5 between the adsorption layer 3 and the sealing layer 2. The annular gap 5 forms a space for the adsorption layer 3 to absorb water and expand. According to the different pore sizes of the adsorption sealing tube 1, the spacing distance between the adsorption layer 3 and the sealing layer 2 is 2 mm to 5 mm.

[0043] In an embodiment of the utility model, in order to keep the adsorption layer 3 and the support layer 4 in the sealing layer 2 in a spaced manner, for example, a retaining sleeve 6 is respectively provided at the two ends of the adsorption sealing tube 1. In a preferred embodiment, the retaining sleeve 6 is engaged in the interior of the sealing layer 2 in an interference fit manner. The retaining sleeve 6, for example, has a first section 61 and a second section 62, and the inner diameter of the first section 61 is greater than the inner diameter of the second section 62 to form a stepped structure. In addition, the outer diameters of the first section 61 and the second section 62 are the same. The end of the adsorption layer 3 abuts at the end of the first section 61. The support layer 4 is engaged in the interior of the first section 61 in an interference fit manner, and the end of the support layer 4 abuts at the end of the second section 62 adjacent to the first section 61 (i.e., the stepped structure). The outer wall of the second section 62 is constructed with a receiving groove 63. Preferably, two receiving grooves 63 are constructed to accommodate the first Y-shaped sealing ring 71 and the second Y-shaped sealing ring 72, respectively. The first Y-shaped sealing ring 71 and the second Y-shaped sealing ring 72 are arranged opposite to each other along the axial direction of the retaining sleeve 6. The first Y-shaped sealing ring 71 and the second Y-shaped sealing ring 72 together form a sealing structure to prevent the annular gap 5 from communicating with the external environment. It is also conceivable that only one Y-shaped sealing ring is provided.

[0044] In an alternative embodiment, the outer wall of the retaining sleeve 6 is configured with an external thread, and the end portion of the inner wall of the sealing layer 2 is correspondingly configured with an internal thread, so that the retaining sleeve 6 can be engaged in the interior of the sealing layer 2 in a screw connection. Similarly, the supporting layer 4 can also be screwed to the first section 61 of the retaining sleeve 6. It is also conceivable that the screw connection can also be replaced by a form-fitting connection, such as a snap connection.

[0045] In one use scenario, high-temperature, high-pressure compressed air is introduced into the adsorption sealing tube 1 from one end of the adsorption sealing tube 1, especially through the retaining sleeve 6. During operation, the compressed air can be transported to the corresponding functional module or other pipelines with the help of the adsorption sealing tube 1. Since the support layer 4 is provided with a discharge channel, the compressed air will pass through the discharge channel to reach the annular gap 5 between the adsorption layer 3 and the sealing layer 2 until the pressure of the compressed air in the support layer 4 and the compressed air in the annular gap 5 are balanced. After the pressure balance is achieved, the compressed air is mainly transported in the support layer 4 and basically does not enter the annular gap 5.

[0046] Pressurized air usually contains moisture. When the temperature of the external environment of the adsorption sealing tube 1 decreases, the moisture in the pressurized air will condense and gather on the inner wall of the support layer 4. Since a discharge channel (such as the through hole 41 and the groove 42) is provided, the condensed water in various places can be quickly discharged radially from the support layer 4 through capillary action and guided to the adsorption layer 3. Since the pressurized air in the adsorption sealing tube 1 flows from one end to the other, it will also drive the condensed water on the inner wall of the support layer 4 to move in the same direction. Therefore, even if the adsorption sealing tube 1 is not discharged through the discharge channel upstream of the support layer 4, it will be "captured" by the next discharge channel. Thereby, sufficient discharge of condensed water is achieved.

[0047] The adsorption layer 3 can absorb and store the discharged condensed water, so that the condensed water will not flow back into the support layer 4 or enter the annular gap 5, and will not contact the sealing layer 2. The adsorption layer 3 will expand after absorbing water, and the annular gap 5 between the adsorption layer 3 and the sealing layer 2 can accommodate the increased volume of the adsorption layer 3 after expansion.

[0048] In another use scenario, the adsorption sealed tube 1 can also transport other gases, which contain undesirable substances. In some cases, the undesirable substances will adhere to the inner wall of the support layer 4 and then pass through the exhaust channel to the outside of the support layer 4. The adsorption layer 3 has an adsorption material that can adsorb the undesirable substances, so that the undesirable substances can be adsorbed and stored. In this way, the undesirable substances can be removed from the gas to a large extent.

[0049] It is also conceivable that the adsorption sealing tube 1 of the utility model is used in industrial pressure pipelines, especially in industrial pressure pipelines of trains, locomotives, passenger cars, or trucks, for guiding fluids. The adsorption sealing tube 1 of the utility model can be used in particular in the braking system of railway locomotives, passenger cars, and trucks.

[0050] With the aid of the adsorption sealing tube 1 of the utility model, many advantages can be achieved. For example, it can prevent the moisture generated by the high-temperature and high-pressure gas during the condensation process from accumulating in the adsorption sealing tube 1 and flowing to the next part or component to produce adverse consequences. In addition, the adsorption sealing tube 1 according to the utility model will not affect the delivery of the pressurized gas, especially will not increase the delivery resistance. For the delivery of the pressurized air of the brake line, the permeability of the conduction of the pressurized air in the adsorption sealing tube 1 is achieved.

[0051] Those skilled in the art can know that butyl rubber, nitrile rubber, polymer absorbent powder, polymer absorbent fiber material, polyacrylamide, polyvinyl alcohol, polyacrylate, polyacrylate, modified fiber, polyester staple fiber, polyester filament, nylon staple fiber, nylon filament, aramid staple fiber, aramid filament, glass fiber staple fiber, glass fiber filament, glass fiber, film, non-woven fabric, fiber fabric, and cotton fabric are all known materials and structures.

[0052] Although the present invention has been described with reference to (one or more) exemplary embodiments, it will be understood by those skilled in the art that the present invention is not limited to the exact structures and components described herein, and that various modifications, variations and variations can be understood from the foregoing description without departing from the spirit and scope of the present invention as defined in the appended claims. The present invention is not limited by the illustrated order of steps, as some steps may be performed in different orders and / or simultaneously with other steps. Therefore, the present invention is not limited to the disclosed (one or more) specific embodiments, but will include all embodiments falling within the scope of the appended claims.

Claims

1. An adsorption sealing tube, characterized in that: The adsorption sealing tube has: A support layer, wherein the support layer is configured with a discharge channel, and the discharge channel penetrates the support layer; An adsorption layer, which is attached to the outer wall of the support layer and has an adsorption function; The sealing layer is arranged outside the adsorption layer.

2. The adsorption sealing tube according to claim 1, characterized in that: The discharge channel is composed of a plurality of through holes, and the through holes are evenly distributed on the support layer; and / or The outlet channel is formed by a plurality of through-going grooves which are formed in a spiral shape around the axial direction of the supporting layer.

3. The adsorption sealing tube according to claim 2, characterized in that: The through holes are circular and have a diameter of 0.2 mm to 0.8 mm, wherein a plurality of through holes form a row and are arranged along the peripheral direction of the support layer, wherein adjacent through holes in a row of through holes are spaced apart by the same angle, wherein a plurality of rows of through holes are arranged along the axial direction of the support layer, wherein the through holes in adjacent rows are staggered at the same angle along the peripheral direction of the support layer and are spaced apart by the same distance along the axial direction of the support layer; and / or Each of the grooves is spirally rotated 360° around the axial direction of the support layer, wherein the width of the groove does not exceed 1 mm, wherein every two adjacent grooves of the grooves are spaced apart by the same distance along the axial direction of the support layer; and / or The support layer is a non-metallic pipe resistant to pressure gas, and the pressure gas has a temperature of -50°C to +200°C and a pressure of 10086Pa to 1000KPa.

4. The adsorption sealing tube according to any one of claims 1 to 3, characterized in that: A retaining sleeve is provided at the end of the adsorption sealing tube, which is arranged inside the sealing layer and engaged with the sealing layer in a fluid-tight manner, wherein the support layer and the adsorption layer are retained on the retaining sleeve, thereby forming an annular gap between the adsorption layer and the sealing layer.

5. The adsorption sealing tube according to claim 4, characterized in that: The retaining sleeve is connected to the sealing layer in an interference fit manner, wherein at least one Y-shaped sealing ring is arranged on the outer wall of the retaining sleeve; or The sleeve is kept connected to the sealing layer in a threaded manner; or The retaining sleeve is connected to the sealing layer in a form-fitting manner, wherein at least one Y-shaped sealing ring is arranged on the outer wall of the retaining sleeve.

6. The adsorption sealing tube according to any one of claims 1 to 3, characterized in that: The adsorption layer has: substrate layer; a water-absorbing material layer, the water-absorbing material layer being combined with one or more surfaces of the substrate layer; The covering layer covers the water-absorbing material layer, and the covering layer is combined with the water-absorbing material layer by bonding, coating, dipping and / or hot melting.

7. The adsorption sealing tube according to claim 6, characterized in that: The adsorption layer also has an anti-corrosion layer, which is combined with the covering layer by bonding, coating or dipping.

8. The adsorption sealing tube according to claim 7, characterized in that: The water-absorbing material layer is composed of at least one of a synthetic rubber water-absorbing material layer and a polymer water-absorbing material layer.

9. The adsorption sealing tube according to claim 8, characterized in that: The polymer water-absorbing material layer is made of one of polyacrylamide, polyvinyl alcohol, polyacrylic acid salt, polyacrylate, and modified fiber; The covering layer contains any one of polyester staple fiber, polyester filament, viscose fiber, nylon staple fiber, nylon filament, aramid staple fiber, aramid filament, glass fiber staple fiber, and glass fiber filament, and is made by any one of bonding, spunbonding, needle punching, weaving, and braiding production methods; and The anti-corrosion layer is made of any one of glass fiber, film, non-woven fabric, fiber woven fabric and cotton woven fabric.

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