29results about How to "Effective barrier" patented technology

The utility model provides a kind of aerogel air pipe assembly, comprising: heat dissipation component and connecting component, heat dissipation component is equipped with several groups same specification, several groups of heat dissipation component equidistantly install on four side surfaces of composite pipe body, heat dissipation component includes several groups of heat dissipation fin for heat dissipation, the side of mounting plate close to composite pipe body is equipped with several groups of heat conduction copper pipe, compared with prior art, the utility model has the beneficial effects as follows: by setting heat dissipation component, when actually using, the heat insulation layer and fire-retardant layer inside composite pipe body can effectively block heat, several groups of heat conduction copper pipe guide heat to the surface of several groups of heat dissipation fin, and heat is dissipated to the outside of composite pipe body by several groups of heat dissipation fin, so as to effectively discharge high temperature inside composite pipe body, the final effect is that heat inside composite pipe body can be effectively discharged, prolong the service life of air pipe main body.

This utility model relates to the field of toilet technology, and more particularly to a vacuum toilet deodorization and noise reduction device. It includes a negative pressure toilet, with a waste storage tank located at the rear of the toilet. A vacuum pump is installed on the top of the waste storage tank, and the vacuum pump is connected to the negative pressure toilet via a waste delivery pipe. An air outlet pipe is installed on the air outlet on one side of the top of the waste storage tank. This utility model utilizes a negative pressure vacuum self-priming pump, which guides the generated airflow to a bottom channel. This changes the traditional method of vacuum pumps where airflow is directly discharged at high speed from the side or top of the pump body. This optimized design avoids high-frequency noise generated by high-speed impact on the pump body and surrounding components during airflow discharge. Previously, directly discharged airflow would impact surrounding structures with significant force, creating harsh noise. However, guided by the bottom channel, the airflow enters the waste storage tank more smoothly, reducing noise sources caused by airflow impact, thereby effectively reducing the overall noise level of the device during operation.

The utility model relates to the technical field of high-temperature molten metal blocking, and discloses a high-temperature molten metal leakage blocking device which comprises a supporting table, the upper surface of the supporting table is fixedly connected with a storage barrel, the surface of the supporting table is provided with a circle of movable groove, and the storage barrel is fixedly connected with the movable groove. A circle of baffle plates are arranged in the circle of movable grooves in a sliding manner; the two side faces of the supporting table are each fixedly connected with a set of fixing plates, a screw rod is rotationally connected between one set of fixing plates, the surface of the screw rod is sleeved with a thread sleeve in a threaded mode, one end of the thread sleeve extends into the movable groove, and the end of the thread sleeve and the baffle are detachably installed; when the device is used, leaked high-temperature molten metal can be effectively blocked, meanwhile, a blocking plate for blocking can be rapidly mounted and dismounted, and the blocking plate can be conveniently replaced or cleaned.

The utility model discloses a modularized cylindrical protection device, and relates to the technical field of mechanical transmission safety protection, in particular to a modularized cylindrical protection device suitable for a coupler between a centrifugal pump and a driver. The device is arranged outside a coupling between a centrifugal pump and a driver; the modularized cylindrical protection device is fixedly connected with the centrifugal pump through the detachable supporting plate module. The modularized cylindrical protective device is a protective cover main body. The shield body is of a cylindrical structure formed by bending a plate-shaped structure with certain strength, and the plate-shaped structure is connected into the cylindrical structure in a fastened mode through the fast-assembly fastening unit. The shield body is fixedly connected with the centrifugal pump through the detachable supporting plate module. A hasp type maintenance skylight module is arranged on the shield main body; and a replaceable lengthened section module is assembled on the shield main body. According to the technical scheme, the problems that in the prior art, installation is complex, protection performance is insufficient, and maintenance is inconvenient are solved.

This invention relates to the field of tunnel disaster prevention and rescue technology, and in particular to a folding airbag device and its method of use for sealing off smoke from train fires in tunnels. The device includes a train consisting of a driver's cab and multiple carriages, and several identical folding airbag devices. These devices are arranged sequentially at intervals from the first to the last end of the carriages and are all fixed to the top of the carriages. In the event of a fire, the folding airbag device of this invention effectively seals off smoke, creating an effective isolation layer and increasing evacuation time for passengers in carriages that have not yet caught fire. It has the advantages of rapid response and high smoke blocking efficiency, effectively extending the available safe evacuation time for passengers in carriages that have not yet caught fire, reducing the harm of fire smoke to passengers, and improving the safety and reliability of trains in railway tunnel fire accidents.

A method of manufacturing a product (P), wherein said method comprises the steps of: preparing a multilayer element (1) comprising at least 80% of a non-extruded material (2) in solid phase and comprising at least one layer (2) which is barrier to liquids and / or oxygen; housing the multilayer element (1) in a mould (100) between a female portion (101) defining a forming cavity (102) and a punch (103) movable along a first longitudinal axis (X); compressing the multilayer element (1) by displacing the punch (103) towards a bottom wall (102a) of the cavity (102); and moving at least one lateral slide (104) of the female portion (101) defining the forming cavity (102) towards said punch (103); the step of moving the lateral slide (104) is performed so as to compress the multilayer element (1) between the slide (104) itself and the punch (103).

The utility model discloses a portable food processor, including the host computer that is equipped with motor and the juicer cup of detachable establishment in host computer top, host computer includes upper cover, the base fixedly connected in upper cover below, motor is fixed in upper cover, motor below is equipped with with motor electricity connection's circuit board and support in circuit board below's fixed bolster, and circuit board and fixed bolster clamping fixed between upper cover and base, and circuit board outer edge is adjacent with the shell inner side wall setting, and the accommodating cavity is formed between fixed bolster and base, and the battery for power supply is equipped in accommodating cavity, make the radial dimension of circuit board can do bigger, thereby for the more functional element of integrated on the circuit board provides the space, help to further promote the overall performance and intelligent level of portable food processor, can also avoid the radial dimension of whole machine to be big while increasing the radial dimension of circuit board, not only improve the compactness of host computer internal structure, can also make host computer radial dimension miniaturization.

The utility model relates to the technical field of power transmission, in particular to a combined cable which comprises a first cable assembly, the first cable assembly comprises an outer coating layer, a first insulating layer, a copper conductor, a winding layer, a polytetrafluoroethylene tape and a mylar layer which are sequentially arranged from outside to inside, and an accommodating space is formed in the outer coating layer; according to the invention, through the arrangement of the outer coating layer, the first insulating layer, the copper conductor, the winding layer, the polytetrafluoroethylene tape, the mylar layer and other components, the winding layer can perform electromagnetic shielding on the copper conductor through a double-helix structure through the mutual cooperation relationship between the winding layer and the copper conductor; therefore, the device can effectively block the screened electromagnetic interference through the electromagnetic shielding structure formed by the winding layer. And meanwhile, the polytetrafluoroethylene tapes are wrapped in a close-packed manner, so that the insulating property of the cable is enhanced.

The utility model discloses a bell jar uniform cup and a bell jar type glaze pouring device.The bell jar uniform cup comprises a cup body and a discharge port, the cup body is provided with a cup opening, the cup opening is used for allowing glaze slip to flow in, the discharge port is formed in the side wall of the cup body, and the discharge port is used for discharging the glaze slip. The discharge outlet is formed in the side wall of the cup body, so that the glaze slip outflow mode is changed, the glaze slip flows out of the discharge outlet of the cup body, floating objects are effectively blocked in the cup body, the glaze pouring quality is improved, the structure is simple, and practicability is high.

This utility model relates to the field of drilling equipment technology, specifically a water-cooled drilling device for castings, used for drilling holes in castings. It includes a drilling device, a fixed base, a chip removal spray gun, a collection frame, a liquid collection chamber, a filter screen, mounting components, and a sealing component. This utility model, by setting up an external cooling unit, an internal cooling unit, and a chip removal spray gun, can promptly clean debris when the casting area is too large. The collection frame and liquid collection chamber around the fixed base effectively collect the used coolant, facilitating subsequent cleaning of the drilling platform. The filter screen in the liquid collection chamber filters the collected coolant. The mounting components facilitate the installation and removal of the filter screen. The sealing component effectively blocks unfiltered coolant when replacing the filter screen, ensuring the filtration accuracy of the coolant. The filtered coolant is then used in the external cooling unit and the chip removal spray gun, reducing coolant usage costs to some extent.

The utility model provides a high-elastic vibration reduction partition wall keel structure which comprises a supporting part located in the middle, extending parts connected to the two ends of the supporting part and bending parts vertically connected to the outer ends of the extending parts. The supporting part comprises a U-shaped plate with an upward opening and a supporting part body which is connected to the bottom end of the U-shaped plate and provided with a downward opening. The extending part is connected to one side of the connecting part, an elastic part arching towards the opening direction of the U-shaped plate is arranged on the extending part, and a first elastic space is defined by the elastic part, the supporting part and part of the extending part. And the arching direction of the elastic part is the same as the extending direction of the bent part. And the space between the bending part and the supporting part is used for placing the fireproof sound-insulation rock wool board. The elastic part and the extending part abut against the position between the two spliced fireproof sound insulation rock wool boards. According to the high-elastic vibration reduction partition wall keel structure, the use defects of an existing vibration reduction keel can be overcome, the vibration reduction and sound insulation effects of a partition wall are improved, the machining difficulty is reduced, and the use effect and stability of the partition wall are improved.

The utility model relates to a double -deck vacuum heat reflection vacuum cup, characteristics are including inner container, outer container and cup cover etc., the inner container with the outer container top fixed connection, the outer container top thread connection has the cup cover, the inside of outer container is paved with metal plating layer, the inside of cup cover is provided with the cavity, and the inside of cavity is paved with metal plating layer, metal plating layer is used for reflecting infrared radiation, the cup cover is provided with the pressure -relief subassembly for the communication inside and outside of the inner container, the advantage is through the inside of outer container is paved with metal plating layer, and the metal plating layer is simultaneously set up in the cavity of cup cover, forms heat radiation reflection barrier, reduces the heat through infrared radiation and spreads, thereby realizes more efficient heat energy barrier, reaches the purpose that promotes the heat preservation performance.

The utility model discloses a waterproof and moisture -proof type electromagnetic lock, it includes: fixed block, the inner surface fixed connection of fixed block has the baffle, the left and right sides of baffle are provided with installation groove and control groove respectively, the lateral wall of baffle is equipped with the communicating groove, the lateral wall of communicating groove is provided with the connecting fixed block, the upper surface of installation groove is provided with the resistance sealing washer, the upper surface of control groove is provided with the inlay cover, the upper surface four corners of inlay cover all are provided with the location bolt with screw thread. Through inlay cover through location bolt accurate fixing, with control groove closely, form a solid physical barrier, blocked the water vapor from control end into, the setting of connecting groove and connecting fixed block, realized the internal connection and collaborative sealing of different areas, strengthened the waterproof performance of electromagnetic lock whole. When external water vapor penetrates to installation groove or control groove, through the communicating structure can better guide it to enter the sealing screw cap, is effectively blocked.

This utility model discloses a roller-hearth type protective atmosphere bright solution furnace with balanced internal gas pressure. The gas pressure at both ends of the rapid cooling section is basically balanced, and the gas pressure in the gas exchange section and the slow cooling section is also basically balanced, effectively isolating the furnace from the external oxidizing atmosphere. The roller-hearth type protective atmosphere bright solution furnace of this utility model includes, along the material flow direction, interconnected gas exchange section, heating section, rapid cooling section, and slow cooling section. The rapid cooling section has a cooling chamber and an air inlet pipe connected to the cooling chamber. The rapid cooling section also has a gas cooling circulation device for extracting process gas from the cooling chamber for cooling and pumping the cooled low-temperature process gas back into the air inlet pipe. A process gas inlet is provided between the heating section and the rapid cooling section for pumping low-temperature process gas into the chambers of the heating section and the rapid cooling section. The air inlet pipe and the process gas inlet are located at the inlet and outlet ends of the rapid cooling section, respectively.

This invention provides a purging device and semiconductor deposition equipment, overcoming the shortcomings of uneven purging and inability to form a complete gas curtain in the transport channel of existing MOCVD equipment. The device sets the first and second purging channels at specific angles, so that the two airflows converge in the chamber in front of the valve plate and are located inside the chamber, thereby forming a fully enclosed protective gas curtain from top to bottom without dead angles. This effectively blocks the diffusion of reactive gases to the valve plate side, improves the dustproof and heat protection effect of the valve plate, and enhances the operational stability and safety of the equipment.

The invention provides a high sound pressure test noise elimination device and a noise elimination system for aircraft test. The device comprises a sound insulation test cabin which is used for accommodating equipment to be subjected to high sound pressure test and is communicated with a sound outlet part of acoustic test equipment which generates high sound pressure noise; wherein the sound insulation test cabin is of a closed sound room structure, and the wall body and the roof of the sound insulation test cabin are of sound insulation structures; the exhaust channel is communicated to the interior of the sound insulation test cabin and used for exhausting air in the sound insulation test cabin, and a sound absorption insertion piece is arranged in the exhaust channel. Through the structural design of the sound insulation test cabin and the exhaust channel, the high-strength noise generated in the operation of the acoustic wave traveling wave tube can be effectively reduced, and the influence on the surrounding environment is reduced.

The utility model belongs to the technical field of residence outer wall enclosure, and discloses a high-rise residence outer wall enclosure structure with a sound insulation effect, which comprises a sound insulation outer wall body and a decorative plate, the upper surface of the sound insulation outer wall body is provided with four mounting grooves, the two opposite sides in each mounting groove are provided with limiting holes, and the decorative plate is arranged in each mounting groove. An extrusion block is fixedly installed at the center of the upper surface of the sound insulation outer wall body, a sealing body is fixedly installed on the side edge of the decorative plate, a splicing mechanism is arranged on the side edge of the sound insulation outer wall body, a filling cavity is formed in the sound insulation outer wall body, and a rubber sheet is fixedly installed on the lower surface of the decorative plate. According to the building envelope structure, efficient sound insulation is achieved through the filling cavity, stable installation of the building envelope structure is achieved through the clamping assembly, the purpose of preventing rain and snow erosion is achieved through the air chamber, and meanwhile the purpose of efficient hoisting is achieved through the detachable hoisting assembly.

This utility model discloses a multimodal adjustable tracheostomy cannula occluder, comprising a main body and a plug located at the lower end of the main body. A breathing chamber is axially oriented through the plug and the main body. A suction port is located on the periphery of the breathing chamber within the main body. An oxygen port connected to the breathing chamber is fixedly connected to the main body. A cap is detachably connected to the upper part of the main body. The inner cavity of the cap contains a filter membrane corresponding to the breathing chamber. A fixing plate is fixedly connected to the upper end of the cap. The fixing plate is rotatably connected to a movable plate that seals or opens the space above the filter membrane. This utility model allows for multimodal adjustment of the breathing chamber within the plug, adapting to the needs of patients at different stages of recovery. It enables "non-disassembly integrated emergency treatment" through the suction port and oxygen port, improving rescue efficiency. It integrates four functions—occlusion, filtration, oxygen administration, and suction—into one device, reducing the operational complexity of the occluder and improving its functionality.

The utility model discloses a kind of high-definition industrial cameras, it includes camera body, the camera body is equipped with front frame, camera lens and polarizing lens component, detachable connecting structure and sealing structure are equipped between the polarizing lens component and the front frame;The camera body is also equipped with heat dissipation structure and net structure;The detachable connecting structure includes two oppositely arranged buckle groups and two oppositely arranged buckle groove groups;The sealing structure includes sealing ring, multi-edge annular groove, multi-edge annular boss, first multi-edge annular groove and first multi-edge annular boss.The utility model realizes the quick assembly and disassembly between polarizing lens component and camera body by setting detachable connecting structure, can be replaced without tool, greatly improves maintenance efficiency.Various seals are realized by setting sealing structure, effectively block water vapor and dust, ensure that high-definition industrial camera is under complex industrial environment Long-term sealing reliability, guarantee the definition and stability of image acquisition.

The utility model discloses an integrated video water level flow velocity flowmeter, and relates to the technical field of flowmeters. The integrated video water level flow velocity flowmeter comprises a water channel structure, blocking equipment and metering equipment are arranged above the water channel structure, and the metering equipment is located behind the blocking equipment. According to the integrated video water level and flow velocity flowmeter, various impurities and foreign matters in water flow can be effectively intercepted and obstructed by arranging the obstructing equipment and utilizing the obstructing frames on the inner side of the mounting frame, the obstructing frames play a crucial filtering role in the water flow, the cleanness of water is ensured, and meanwhile, the water level and flow velocity of the water flow can be greatly improved. A gear motor arranged in a driving box can drive a hinge rod to move accurately through accurate control, the movement of the hinge rod drives a lifting table, then a blocking frame on the inner side of a mounting frame is promoted to conduct effective recycling operation, and due to cooperative work of a series of actions, interference of foreign matter in water flow to the detection process of metering equipment is reduced.

The application discloses an environment-friendly fluorine-free polyester fiber and a preparation method thereof, and belongs to the technical field of textiles. The problems of poor water repellency and poor air permeability in the prior art are solved. The environment-friendly fluorine-free polyester fiber comprises the following components: 69-73% of polyester chips, 5-6% of a first modifier polyhydroxy fatty acid ester, 9-10% of a second modifier polysiloxane-polyester block copolymer, 10% of a base material and 3-5% of a flexible auxiliary agent. The first modifier polyhydroxy fatty acid ester is prepared from polyhydroxy fatty acid ester. The fluorine-free modifier is introduced, the hydrophobic group is introduced through molecular structure design, efficient blocking of water and oil pollutants is realized, the fluorine-free modifier is fused with the polyester chips in the spinning stage through a melt blending-in-situ polymerization integrated process, the core-shell fiber structure is completed, the functional durability and air permeability are considered, the fluorine-free modifier is fused with the polyester chips in the melting stage, the auxiliary agent is avoided to be left on the surface of the fiber, more active sites are provided, and the whole does not contain perfluorinated compounds.

The application relates to the technical field of photovoltaic modules, and discloses a low-water-transmission packaging method suitable for offshore photovoltaic modules, which comprises the following steps: S1, front glass laying; S2, laying the front adhesive film with POE adhesive film on the periphery and EVA adhesive film on the inner side on the front glass; S3, laying the cell string on the front adhesive film and completing the overlay welding to form a cell string array; S4, laying the back adhesive film same with the front adhesive film on the cell string array; S5, laying the back glass on the back adhesive film; and S6, photovoltaic module laminating. Through the use of the low-water-transmission packaging method suitable for offshore photovoltaic modules, the front adhesive film and the back adhesive film with the POE adhesive film on the periphery and the EVA adhesive film on the inner side are laid, so that the POE adhesive film covers the periphery side and the edge area of the upper and lower surfaces of the cell string array after lamination; the low-water-transmission packaging method of the photovoltaic module is simple in operation, low in cost, saves manpower and material resources, and can long-term guarantee the waterproof effect of the photovoltaic module.

The utility model relates to a kind of air entrainment type stirring devices, belong to stirring equipment technical field, including reaction kettle, the middle part of reaction kettle is equipped with main guide pipe, the lower part of main guide pipe two sides is respectively communicated with L-shaped guide pipe, the lower end outer periphery of main guide pipe and the upper end outer periphery of two L-shaped guide pipe are all fixedly sleeved with guide inner sleeve, the end of guide inner sleeve is equipped with transmission guide hole, the outer periphery of guide inner sleeve is slidably sleeved with guide outer sleeve, the inside of one end of guide outer sleeve close to transmission guide hole is fixedly connected with transmission spring, transmission spring is fixedly connected with the one end of guide inner sleeve close to transmission guide hole, the outer periphery of guide inner sleeve is equipped with several ring array evenly distributed inner guide holes, the outer periphery of guide outer sleeve is equipped with several ring array evenly distributed outer guide holes, when air pressure reduces, inner guide hole and outer guide hole are no longer communicated, effectively block reactant.

The invention discloses a protective coating for a glass inner wall of a container and a preparation method of the protective coating, and belongs to the technical field of coatings. The protective coating is of a composite film structure and comprises an inner layer composed of oxides of silicon, aluminum, zirconium and titanium and an outer layer composed of pure silicon oxide. And the inner layer comprises the following elements in percentage by mass: 80 to 100 percent of silicon element, 0 to 10 percent of aluminum element, 0 to 10 percent of zirconium element and 0 to 3 percent of titanium element based on the total mass of the silicon element, the aluminum element, the zirconium element and the titanium element being 100 percent. By adopting a specific double-layer composite structure, the gradient compact barrier with complementary functions is formed. The structure not only can synergistically block precipitation of various ions, but also has the advantages of firm combination and good thermal stability, so that the chemical stability and the service life of the glass container are remarkably improved.

This invention discloses a flood-proof door and control method for open sections of subway tunnels, comprising a swing-type door body, a door body base, and an adjusting base. The swing-type door body is installed on the door body base and can rotate around the door body base. The adjusting base is located below the swing-type door body and is used for installation on the U-shaped groove ground of the subway entrance / exit line. A side seal is installed between the swing-type door body and the door body base, and a bottom seal is provided between the swing-type door body and the adjusting base. A channel for the track to pass through is opened at the bottom of the swing-type door body, and a track position seal is provided at the channel location. The track position seal includes a power component, a linkage transmission mechanism, and two sealing components. The power component is connected to the linkage transmission mechanism, and the linkage transmission mechanism is connected to the two sealing components. The power component can drive the linkage transmission mechanism to move, thereby causing the two sealing components to clamp and seal the track. This ensures the waterproof sealing performance of the flood-proof door, effectively preventing floodwater from entering the subway entrance / exit line through the flood-proof door.

This invention discloses a powder coating for metal coils and its preparation method, belonging to the field of powder coating technology. This invention combines carboxyl-terminated polyester resin, epoxy resin, and modified polyimide, which significantly improves the coating's adhesion, flexibility, and bending resistance. Furthermore, the added modified filler A is a cerium and zirconium synergistically intercalated modified montmorillonite, which not only acts as a corrosion inhibitor, increasing the coating's corrosion resistance, but also helps delay the photo-oxidative degradation of the resin matrix, achieving better weather resistance. Zirconium also increases the interlayer spacing of montmorillonite, facilitating the uniform dispersion and anchoring of cerium ions within the montmorillonite framework, effectively extending the diffusion path of corrosive media. Modified filler A and modified filler B work synergistically to form effective physical barriers and chemical effects, achieving better weather resistance and corrosion resistance. Overall, the powder coating prepared exhibits excellent adhesion, weather resistance, and corrosion resistance.

The present application belongs to the technical field of laminated glass, and particularly relates to a laminated glass with heat insulation and protection functions, comprising semi-toughened glass one, wherein the lower end of the semi-toughened glass one is provided with a sunlight control coating, the upper end of the semi-toughened glass one is provided with a structural adhesive layer, the upper end of the structural adhesive layer is provided with semi-toughened glass two, and the upper end of the semi-toughened glass two is provided with a composite functional adhesive film. The laminated glass is provided with an ultraviolet blocking layer, a composite functional adhesive film and a sunlight control coating, which are cooperated with each other to realize efficient blocking of ultraviolet rays, selective reflection of infrared heat and selective reflection of sunlight incident angle to prevent glare, while ensuring the heat insulation effect and maintaining a high visible light transmittance. The laminated glass is provided with a gradient energy dissipation structure formed by the cooperation of the multi-layer semi-toughened glass, the composite functional adhesive film and the structural adhesive layer, so that the impact strength of the product is improved. Even if the outer glass is broken, the middle layer can still maintain the overall structure to prevent the fragments from splashing and injuring people.

The invention relates to the technical field of diaphragms for flow batteries, in particular to a branched polybenzimidazole composite membrane for an all-vanadium flow battery and a preparation method of the branched polybenzimidazole composite membrane. The preparation method comprises the following steps: step 1, synthesizing branched PBI; step 2, preparing a branched PBI base membrane; and 3, performing interfacial polymerization modification to form a functional separation layer. The invention aims to provide an efficient and reliable solution for solving the technical problem through material innovation and process optimization on the basis of a synergistic strategy of a branched PBI base membrane and interfacial polymerization modification.

The application discloses a stripping and forming process of a multi-doffer carding machine, and the stripping group is opposite to the discharge end of a condensing roller, a plurality of strip gap adsorption holes are staggered and spaced, and the discharge end forming direction and angle are changed under the cooperation of the uniform division of the stripping force and adsorption width formed by the plurality of strip gap adsorption holes at different angles and gradual changes, so that the fiber web is formed in the reduction of the instantaneous forward adsorption force of the fitted annular transfer belt. On the one hand, the gradual stripping and regional superposition of the plurality of strip gap adsorption holes avoid the fiber pulling caused by instantaneous adsorption, improve the sufficiency and uniformity of the transfer from the condensing roller, and thus the web quality is improved; on the other hand, the intersecting layout of the strip gap adsorption holes effectively blocks and disperses the moving airflow, prevents the fiber web from bulging or the uneven stress inside and outside, and promotes the stable fitting and transfer of the fiber web.