32results about How to "Reliable sealing method" patented technology

The invention relates to a high-pressure gas bottle and an inflating method thereof. The high-pressure gas bottle comprises a bottle nozzle which is provided with a gas bottle opening, the gas bottle opening is a ladder outlet with a smaller inner part and a bigger outer part, an inflating plug is arranged at a wide mouth section of the ladder outlet in a revolving mode through screw threads, the inflating plug is provided with a gas outlet channel communicated with the gas bottle opening, a sealing membrane is arranged at the outer port of the gas outlet channel in a sealing mode, and the ladder end face of the opening forms a sealing fit with the inner side end face of the inflating plug. The inflating plug is firstly unscrewed for 1 to 3 circles when inflating, gas is inflated to the gas bottle through thread gaps between the inflating plug and the bottle nozzle, the inflating plug is screwed for sealing when the inflation is over, and then sealing weld is set on the end face of the bottle nozzle so as to realize sealing between the inflating plug and the gas bottle opening. The inflating plug is arranged in the gas bottle opening in a revolving mode, gas is inflated to the gas bottle through the thread gaps between the inflating plug and the bottle nozzle, and the inflation is simple, safe and reliable.

A atomizing powdering is provided and is provided with an open smelting furnace used for melting steel and a tundish for receiving molten steel. The molten steel in the open smelting furnace is kept sufficient so that the tundish can quickly receive the molten steel from the furnace, thereby pouring a spray ladle. Further, on the one hand, a plurality of tundishes, such as two, can be designed such that the two tundishes can alternately receive molten steel from the open smelting furnace and carry out continuous multi-pack casting of the same spray ladle. On the other hand, multiple spray ladles can be designed to save time in replacing the spray ladles. In this way, the time and operation rate of the powdering process can be improved, and the refractory material in the spray ladles can besaved.

The invention discloses a solid fuel vacuum pouring device which comprises a hopper, a plunger type flow regulating valve core, a pattern plate, a pouring cylinder cover, a pouring cylinder body, a water bath circulating heater, a water bath silica gel hose, a vacuum pressure gauge, a vacuum pipeline, a vacuum pump, a manual three-way ball valve and a forming die. The hopper and the pouring cylinder body are designed into a double-layer structure, and the circulating water bath heater is used for heating and insulating the hopper and the pouring cylinder body, so that the temperature of medicinal slurry can be maintained within a temperature range required by a pouring process for a long time, the fluidity and the leveling property of the medicinal slurry meet the requirements of the pouring process, and normal pouring of the medicinal slurry is realized. The replaceable pattern plate is arranged at the bottom of the hopper and can be adjusted and replaced according to the size and theshape of fuel. The interior of the pouring cylinder body is connected with the vacuum pump through a vacuum conduit, so that the medicinal slurry is poured into the forming die in a vacuum environment, and the poured fuel is free of bubbles or air holes.

The invention relates to an improved optical fiber splice sealing box and a sealing method. The optical fiber splice sealing box is composed of an optical fiber fusion splice tray used for containing and fixing a main optical cable and a plurality of optical fibers, a sealing member used for matching the optical fiber fusion splice tray to fix the main optical cable and the optical fibers, a pressing plate used for fixing the sealing member on the optical fiber fusion splice tray, a square cavity box used for containing the optical fiber fusion splice tray and connected with the pressing plate and the sealing member to form a closed cavity. The optical fiber splice sealing method is as follows: the sealing member fixed with the main optical cable and the optical cables is arranged in a semi-closed cavity on one end of the optical fiber fusion splice tray and is fixedly connected with the optical fiber fusion splice tray through the pressing plate. The optical fiber splice sealing box uses an improved mechanical sealing form and has the advantages of reliable sealing method, simple and convenient operation, repeated use and convenient repair and market expansion.

The invention discloses an electric assistant heating forming device and method for dissimilar material complicated section pipe fittings. Pipe blanks welded by dissimilar material pipes and inner coating pipes positioned in the pipe blanks are positioned in an air expansion forming mold; two ends of the pipe blanks are sealed through sealing push heads and elastic sealing blocks; the positions offlexible copper blocks are adjusted by using advancement and retreating of push rods to realize local area heating; high-pressure gas is injected in the inner coating pipes to enable the pipe blanksto quickly bond on molds; meanwhile, the push heads are pushed for feeding; after formation, the heating is stopped; the high-pressure gas in the pipe blanks is relieved; formed double-layer pipe fittings are taken out; and the inner coating pipes are removed through acid washing to obtain final pipe fittings. The device and the method are suitable for expansion of the dissimilar material pipes, solve the problems of inharmonious deformation in expansion of traditional dissimilar material pipe blanks and rupture of welding lines through local heating and coating plate expansion, also can be used for gradual formation of pipe fittings in multiple expansion areas, meet urgent demands in such fields as aerospace, and achieve high practical value.

The invention discloses a speed-up gearbox of a horizontal-axis ocean current energy generator set. The speed-up gearbox of the horizontal-axis ocean current energy generator set comprises a gear ring, at least three primary shafts, a secondary shaft and a high-speed shaft, wherein the gear ring rotates synchronously with a main shaft, the primary shafts are evenly and annularly distributed with the axis of the main shaft as the center axis, and the secondary shaft and the high-speed shaft are both coaxial with the main shaft. Each primary shaft is parallel to the main shaft. One end of each primary shaft is provided with a primary shaft gear, and the other end of each primary shaft is sleeved with a transmission shaft which rotates synchronously with the primary shaft. Each transmission shaft is provided with a transmission gear synchronously rotating with the transmission shaft. The primary shaft gears are meshed with the gear ring, and an inner gearing transmission mechanism is formed. The two ends of the secondary shaft are provided with a secondary shaft gear and outer splines correspondingly. The secondary shaft gear is meshed with the transmission gears, and an outer gearing transmission structure is formed. The end face of the end, facing the secondary shaft, of the high-speed shaft is provided with a blind hole. Inner splines meshed with the outer splines are arranged in the blind hole. The high-speed shaft is sleeved with a brake disk rotating synchronously with the high-speed shaft. The high-speed shaft is provided with a coupler connected with an input shaft of a generator. The invention further discloses the horizontal-axis ocean current energy generator set.

The invention relates to the F16K5 / 00 classification of a faucet or cock containing only a cutting device in IPC (International Patent Classification), in particular belonging to a ball rod valve. The technical scheme adopted by the invention is as follows: the ball rod valve comprises a fixed nut cap (1), an operating handle (2) and a valve body which comprises a water outlet (7) and a water inlet (8); and the ball rod valve is characterized in that the operating handle (2) is connected with a valve plate assembly (6) in the valve body (5) through a valve rod (3) with a consubstantial ball valve, and in addition, the valve rod (3) with the consubstantial ball valve outside the valve body (5) is provided with a valve rod ball valve cover (4). The ball rod valve provided by the invention has the following beneficial effects: 1. the adopted method for sealing the valve rod with the consubstantial ball valve and the valve body is reliable, the performance is good, and the valve is endurable; and 2. according to different occasions, the structure of the valve rod with the consubstantial ball valve provided by the invention can be used by adopting an axial mode and a radial mode.

The invention belongs to the field of underwater instruments, especially to an underwater magnet sensor which senses a permanent magnet and outputs signals underwater. The underwater magnetic sensor comprises an inductive pedestal, magnetic induction sensors and an underwater conjunction box, wherein each magnetic induction sensor composed of a tongue tube and a sealing cap is mounted on the inductive pedestal. When the permanent magnet approaches, signals sensed by the magnetic induction sensor are gathered into the underwater conjunction box via signal gathering cables, and the gathered signals are output by a signal output cable after junction. The inductive pedestal includes sealing cap fixing holes, cable sealing holes, a magnet through hole and self fixing holes. The signal gathering cables are respectively sealed by sealing parts when penetrating through the inductive pedestal. The underwater conjunction box is composed of a cylinder and end caps at the two sides, the end caps at the two sides are respectively fixed to watertight plugs, cables on the plugs are gathered inside a sealed compartment, and one watertight plug is connected with the signal output cable to output inductive signals. The underwater magnet sensor has the advantages including sensitive induction, reliable sealing performance and selectable operating water depth.

The invention discloses a fuel accessory component oil leakage volume testing apparatus which is configured in such that: the testing apparatus is provided with an enclosed cavity which is connected to a enclosed cavity pedestal, an oil inlet opening which is arranged on the wall of the enclosed cavity, and a plug which is disposed on the pedestal; two rubber rings are axially arranged along the inner wall inside the enclosed cavity; the two rubber ring, the enclosed cavity pedestal and the plug completely enclose oil leakage parts. According to the invention, the testing apparatus is characterized in such that: the rubber rings adopt radial sealing in order to provide reliable sealing for a test; side opening for oil leakage: specific oil receiving parts are designed to provide oil leakage volume information in an accurate manner, which makes oil leakage volume more accurate and reliable; an integrated clamp has a simple structure; the apparatus avoids influence from ambient environment and makes oil leakage volume accurate and reliable; a detachable apparatus is also provided with a specific to bar for detaching the component, which is easy and reliable.

The invention provides a dental handpiece oiling and cleaning system. The output end of an air source is connected with the input end of a cross. The first output end of the cross is connected with the input end of a tee I. The first output end of the tee I is connected with the input end of a cleaner cup through a control valve I. The output end of the cleaner cup is connected the first input end of a multi-way joint through a one-way valve I. The second output end of the tee I is connected with the input end of a lubricator through a control valve II. The output end of the lubricator is connected with the second input end of the multi-way joint through a one-way valve II. The second output end of the cross is connected with one input end of the tee II through a control valve III. The third output end of the four-way joint is connected with the other input end of the tee II through a control valve IV. The output end of the tee II is connected with the third input end of the multi-way joint through a one-way valve III. Multiple output ends of the multi-way joint are connected with dental handpiece mounting units through control valves, respectively. A water source is connected with the inlet end of a pressure pump. Two outlet ends of the pressure pump are connected with the lower spray inlet end and the upper spray inlet end respectively. The control valve III is electrically connected with the pressure pump. The dental handpiece oiling and cleaning system has the advantages of grouped operation is adopted, oiling is more even, cleaning is more thorough and air consumption is lower.

The invention discloses a horizontal axis semi-integrated type ocean current energy generator set. The horizontal axis semi-integrated type ocean current energy generator set comprises a propeller hubmodule, a main shaft gear case integrated module and a motor module which are sequentially arranged. The main shaft gear case integrated module comprises a main shaft, a power output shaft and a shell. A main shaft front end bearing pedestal and a main shaft rear end bearing pedestal are arranged between the two ends of the main shaft and the shell correspondingly. The main shaft front end bearing pedestal is located on the side, facing the propeller hub module, of the main shaft rear end bearing pedestal. A main shaft seal preventing seawater in the outside world from entering the main shaftgear case integrated module is arranged between the main shaft front end bearing pedestal and the main shaft. A propeller hub flange is arranged at the end, facing the main shaft, of the propeller hub module. A rapid replacement seal structure used for rapidly overhauling and replacing a seal ring of the main shaft seal is arranged between the main shaft and the propeller hub flange. The motor module comprises a motor input shaft. An elastic coupling module is arranged between the power output shaft and the motor input shaft.

The invention discloses a double-mandrel direct-connection precise rotating shaft. The double-mandrel direct-connection precise rotating shaft comprises a main mandrel and a mandrel, wherein the mandrel penetrates and is fixedly connected with a wave generator of a harmonic reducer, the large end of the main mandrel is fixedly connected with a flexible gear of the harmonic reducer, a rigid gear of the harmonic reducer is fixedly connected with a B shaft outer cover, a first contact ball bearing and a second contact ball bearing are fixed on the inner side of the B shaft outer cover, which is close to the harmonic reducer, a third contact ball bearing and a fourth contact ball bearing are fixed on the inner side of the B shaft outer cover, which is far away from the harmonic reducer, inner rings and outer rings of the first, second, third and fourth contact ball bearings are connected with inner and outer ring sleeves respectively, and a first flange and a second flange are disposed at two ends of the B shaft outer cover. According to the double-mandrel direct-connection precise rotating shaft, two mandrels are arranged inside, and the small mandrel drives the large mandrel through the harmonic reducer.

The invention relates to the technical field of welding equipment, in particular to a welding gun. The welding gun comprises a spray head, a gas cavity, a nozzle assembly and a ball valve, wherein thespray head and the gas cavity are connected through pipe threads, the gas cavity and the nozzle assembly are connected through a connecting sleeve, the nozzle assembly is connected with the ball valve through pipe threads, and the spray head is in an arc shape of 45 degrees; the nozzle assembly comprises a nozzle, an adjusting nut, a gasket, an adjusting sleeve and a connector, wherein one end ofthe adjusting sleeve is provided with the nozzle, and the other end of the adjusting sleeve is provided with the connector, outer threads are arranged on the outer wall of the adjusting sleeve, the adjusting nut is arranged on the outer wall of the adjusting sleeve in a sleeved mode, and the gasket is arranged between the connecting sleeve and the adjusting nut; the connecting sleeve is connectedwith the gas cavity through pipe threads, and the connecting sleeve is connected with the adjusting sleeve through pipe threads; a cover ring is arranged on the spray head and is connected with the outer wall of the spray head in a sleeved mode; and one end of the ball valve is connected with the connector, and the other end of the ball valve is connected with a leather pipe connector. The welding gun is simple in structure and high in welding quality.

The invention relates to the technical field of welding devices, in particular to a welding gun. The welding gun comprises a sprayer, an air cavity, a nozzle assembly and a ball valve. The sprayer and the air cavity are connected through pipe threads. The air cavity and the nozzle assembly are connected through a connecting sleeve. The nozzle assembly and the ball valve are connected through the pipe threads. The sprayer is in a 45-degree arc shape. The nozzle assembly comprises a nozzle, an adjusting nut, a gasket, an adjusting sleeve and a joint. The nozzle is arranged at one end of the adjusting sleeve, and the joint is arranged at the other end of the adjusting sleeve. An outer thread is arranged on the outer wall of the adjusting sleeve. The adjusting nut is arranged on the outer wall of the adjusting sleeve in a sleeving mode. The gasket is arranged between the connecting sleeve and the adjusting nut. The connecting sleeve and the air cavity are connected through pipe threads. The connecting sleeve and the adjusting sleeve are connected through pipe threads. The welding gun is simple in structure and high in welding quality.

The invention discloses an apparatus and method for preparing high-energy fiber forage grass through the steam explosion technology, and belongs to the technical field of straw utilization. The methodcomprises the following steps: first crushing straws and removing impurities, then filling crushed straws into a steam explosion tank, introducing saturated steam, maintaining a certain pressure fora certain period of time, then exploding out the straws to produce high-energy fiber forage grass, and then adding other beneficial special microorganisms and auxiliary materials to produce compositehigh-energy fiber forage grass. The steam explosion apparatus comprises the steam explosion tank, wherein a hydraulic oil cylinder is connected with a triangular cone through a steel wire rope, the triangular cone can move up and down and can close a material inlet when moving to the highest position, a material outlet is equipped with a pneumatic hard seal hemisphere valve, and a steam inlet, a pressure detection instrument, a temperature detection instrument, a safety valve and the like are additionally arranged. The straws are disinfected and sterilized in the steam explosion tank, the pesticide residual toxicity is decomposed, and lignin and cellulose are softened and partially degraded; and a pressure is suddenly relieved, so that the whole structure of the straws is torn and loosened, the absorption and digestion of cattle and sheep are facilitated, and therefore the digestibility and nutritional value of straw feed are improved. The apparatus and method have the advantages of being simple in technological process, simple in apparatus structure, low in cost, high in economic benefits, and easy to industrialize.

The invention relates to a high-pressure gas bottle and an inflating method thereof. The high-pressure gas bottle comprises a bottle nozzle which is provided with a gas bottle opening, the gas bottle opening is a ladder outlet with a smaller inner part and a bigger outer part, an inflating plug is arranged at a wide mouth section of the ladder outlet in a revolving mode through screw threads, theinflating plug is provided with a gas outlet channel communicated with the gas bottle opening, a sealing membrane is arranged at the outer port of the gas outlet channel in a sealing mode, and the ladder end face of the opening forms a sealing fit with the inner side end face of the inflating plug. The inflating plug is firstly unscrewed for 1 to 3 circles when inflating, gas is inflated to the gas bottle through thread gaps between the inflating plug and the bottle nozzle, the inflating plug is screwed for sealing when the inflation is over, and then sealing weld is set on the end face of the bottle nozzle so as to realize sealing between the inflating plug and the gas bottle opening. The inflating plug is arranged in the gas bottle opening in a revolving mode, gas is inflated to the gasbottle through the thread gaps between the inflating plug and the bottle nozzle, and the inflation is simple, safe and reliable.

A gas generator for secondary driver of car is composed of a cylindrical barrel and both end covers. Said cylindrical barrel contains an ignition chamber with igniter, base and igniting cup, a combustion chamber with gas generating tablets, elastic disc for fixing said tablets and compressed spring, and a filter chamber. Its advantages are high speed to create initial pressure, stable outlet pressure of combustion chamber, and high filtering effect.

The invention belongs to the field of marine equipment and particularly relates to a buoy seal cabin which comprises a seal cabin cable incoming coil, a seal cover, an upper end port and a seal cabin main body. A data collection box and storage batteries are connected mutually and electrically and arranged in the seal cabin main body, one end of the upper end port is in integrated watertight connection with the seal cabin main body, the seal cover covers the other end of the upper end port and is detachably connected with the other end of the upper end port in a watertight mode, and the seal cabin cable incoming coil is in watertight connection onto the lateral wall of the upper end port. By means of the buoy seal cabin, a plurality of cables of multiple devices can enter the buoy seal cabin in a non-leakage mode, and fixation and seal are performed on the data collection box, the storage batteries and the like. Furthermore, the buoy seal cabin has the advantages of being easy to seal, reliable in seal between the seal cabin cable incoming coil and the upper end port, durable, good in universality of seal cables, capable of guarding against thieves, good in integral stability and the like.

The invention discloses a speed-up gearbox of a horizontal-axis ocean current energy generator set. The speed-up gearbox of the horizontal-axis ocean current energy generator set comprises a gear ring, at least three primary shafts, a secondary shaft and a high-speed shaft, wherein the gear ring rotates synchronously with a main shaft, the primary shafts are evenly and annularly distributed with the axis of the main shaft as the center axis, and the secondary shaft and the high-speed shaft are both coaxial with the main shaft. Each primary shaft is parallel to the main shaft. One end of each primary shaft is provided with a primary shaft gear, and the other end of each primary shaft is sleeved with a transmission shaft which rotates synchronously with the primary shaft. Each transmission shaft is provided with a transmission gear synchronously rotating with the transmission shaft. The primary shaft gears are meshed with the gear ring, and an inner gearing transmission mechanism is formed. The two ends of the secondary shaft are provided with a secondary shaft gear and outer splines correspondingly. The secondary shaft gear is meshed with the transmission gears, and an outer gearing transmission structure is formed. The end face of the end, facing the secondary shaft, of the high-speed shaft is provided with a blind hole. Inner splines meshed with the outer splines are arranged in the blind hole. The high-speed shaft is sleeved with a brake disk rotating synchronously with the high-speed shaft. The high-speed shaft is provided with a coupler connected with an input shaft of a generator. The invention further discloses the horizontal-axis ocean current energy generator set.

The invention relates to a sealing structure and method applied to a high-pressure container. The structure comprises the high-pressure container, an unloading opening is formed in the high-pressure container, a step is arranged at one end of the high-pressure container and used for containing an anti-explosion piece for detecting the sealing effect, mineral powder with certain gradation is arranged on the anti-explosion piece, and a gap is formed between the anti-explosion piece and the inner wall of the high-pressure container; water is injected into the high-pressure container through a water injection mechanism, the mineral powder with certain gradation flows towards the threaded gap between the anti-explosion piece and the inner wall of the high-pressure container under the pushing effect of water, the threaded gap is filled in order, and sealing is achieved. The sealing method of the technical scheme is more efficient than a traditional sealing mode or based on a high-pressure container structure type or by utilizing a special sealing material. According to the sealing structure and method, mineral powder is used for plugging, the method is a reliable supplement of a conventional sealing mode, and the mineral powder is a product generated through rapid unloading of the high-pressure container but not specially customized. Therefore, the sealing method is simple, efficientand reliable.

The invention provides a thin-wall type cooling hole liquid flow detection device and method, and solves the problem that cooling hole liquid flow detection cannot be carried out due to the fact that the side wall structure of an engine combustion chamber is thin, not easy to fix, large in deformation risk and not easy to seal in the prior art. The detection device comprises a water inlet assembly, an inner tube assembly and a connecting assembly, the principle that acting force and counter-acting force are balanced and equal is adopted, and the inner tube assembly and the water inlet assembly which are tightly attached to the inner wall and the outer wall of a product are connected through a screw of the connecting assembly, and due to the fact that acting force and counter-acting force are the same in magnitude and opposite in direction, the force applied to the product by the inner tube assembly and the water inlet assembly in one direction can be completely counteracted, so that product deformation is avoided, the detection device and the product are connected into an integral structure through the screw, and the product is convenient to protect, carry, test and the like.

The invention belongs to the field of underwater instruments, especially to an underwater magnet sensor which senses a permanent magnet and outputs signals underwater. The underwater magnetic sensor comprises an inductive pedestal, magnetic induction sensors and an underwater conjunction box, wherein each magnetic induction sensor composed of a tongue tube and a sealing cap is mounted on the inductive pedestal. When the permanent magnet approaches, signals sensed by the magnetic induction sensor are gathered into the underwater conjunction box via signal gathering cables, and the gathered signals are output by a signal output cable after junction. The inductive pedestal includes sealing cap fixing holes, cable sealing holes, a magnet through hole and self fixing holes. The signal gathering cables are respectively sealed by sealing parts when penetrating through the inductive pedestal. The underwater conjunction box is composed of a cylinder and end caps at the two sides, the end caps at the two sides are respectively fixed to watertight plugs, cables on the plugs are gathered inside a sealed compartment, and one watertight plug is connected with the signal output cable to output inductive signals. The underwater magnet sensor has the advantages including sensitive induction, reliable sealing performance and selectable operating water depth.

The invention provides a mass spectrum and chromatography interface device and a mounting method thereof. The mass spectrum and chromatography interface device comprises a chromatographic column, the end cover is provided with a first axial extension part, a radial part, a second axial extension part and a third axial extension part which are arranged in sequence; a hollow inner diameter expansion section is arranged in the first axial extension part, and a through hole is formed in the radial part; the second axial extension part is connected with the circumferential direction of the radial part, and the outer diameter of the second axial extension part is smaller than that of the third axial extension part; the pressed part is arranged in the inner diameter expansion section and is extruded by the extrusion part; a protective tube is arranged on one side of the radial part; the chromatographic column sequentially penetrates through the protective tube, the through hole of the radial part, the through hole of the pressed part and the through hole of the extrusion part; and a sleeve is arranged on the outer side of the protection pipe, one end of the sleeve is connected with the third axial extending part, and the other end of the sleeve is provided with a mounting position. The sealing piece is arranged on the outer side of the second axial extrusion part in a sleeving mode. The device has the advantages of good sealing, small error and the like.

A container with sealing strip in each splice seam of floor features that the ends of each floor board have a slope, and two slopes of adjacent floor boards can form a slot, and a sealing strip is embedded in the slot. Its advantage is no need of central beam for floor.

The invention discloses a non-central blanking solid shaft transmission pulverized coal separator and a using method, the non-central blanking solid shaft transmission pulverized coal separator comprises a solid shaft transmission device, an upper shell and a lower shell, and the solid shaft transmission device is arranged on the upper shell; the upper side part of the solid shaft transmission device is arranged above the upper shell; the lower side part of the solid shaft transmission device is arranged in the upper shell; the upper shell and the lower shell can be tightly butted and fixedly connected; a rotor is arranged below the solid shaft transmission device; and static blades are arranged on the outer side of the rotor. The structure is simple, and sealing is reliable. For a dynamic separator matched with non-central blanking powder manufacturing equipment, hollow shaft transmission is simplified into solid shaft transmission, so that the transmission structure is simplified, the number of parts is reduced, and the production cost is reduced; all parts of the separator are designed in a modularized mode, installation and maintenance are convenient, the solid shaft transmission separator is small in occupied space, powder pipe butt joint in a transformation project is simple, the workload is small, the bearing sealing mode is reliable, and the sealing air demand quantity is small.

The invention relates to a dismountable heat insulation device of a railway tank car. The dismountable heat insulation device comprises a heat insulation case, wherein the heat insulation case comprises a plurality of heat insulation case tube sections arranged in the length direction of a tank car tank body; each heat insulation casing tube section comprises an upper part and a lower part; each heat insulation casing tube section is detachably connected with the tank body through a connecting component; a gap is formed between the two adjacent heat insulation casing tube sections; the gap can meet the operation requirements of the connection component. The heat insulation device consists of the plurality of heat insulation casing tube sections; the installation is convenient; the local dismounting can be realized; the workload and the work intensity during the manufacturing and overhaul of the tank car can be greatly reduced.

The invention provides a roller sealing device of a chip removal machine. The roller sealing device is used for solving the technical problems that in the existing technology, end face water sealing,packing and other sealing elements are adopted, elasticity is lost due to ageing, consequently, sealing is invalid, cutting liquid obtained after filtering contains a large number of cutting chippings, a machine tool pipe is blocked, and a cutter is additionally abraded. Main structures of the sealing device comprise a movable ring, a convex ring arranged on the movable ring, a fixed ring and a cover plate, an annular cavity is formed among the above components, a pipe threaded hole is formed in the fixed ring, the pipe threaded hole is connected with a high pressure connector, the high pressure connector communicates with the annular cavity, the sealing function of the sealing device is achieved through the pressure difference and the sealing structure comprehensively, and the problem that the roller device is invalid in sealing is solved. In addition, the invention provide a roller of the chip removal machine and the chip removal machine, and the roller and the chip removal machine both use the structure and the working principle of the above roller sealing device.