481results about How to "Guaranteed tightness" patented technology

A seal structure of an electric kettle comprises a body with a handle and a bottom cover of the body. A heating element is disposed in the body. The body is provided with a body opening corresponding to the heating element. A seal part is disposed at the connection of the body opening with the heating element. The seal part or the body is provided with a snap ring outside. The snap ring for fixing the heating element is hermetically connected with the body, or the seal part or the body is provided with a retractable strip, or a metal tying wire for fixing the heating element is hermetically connected with the body. The seal part is provided with a groove part with an upward opening, or the inner wall of a silicone seal ring and the outer wall of the heating element form a groove part with an upward opening, or a contact face of the seal part is in extrusion-deforming fit with the cross section of the body opening. The seal part is added to the heating element and provided with the snap ring, the retractable strip or the metal tying wire outside, and accordingly the heating element is hermetically connected with the body, poor tightness, seepage and the like are effectively prevented, and product quality is improved.

The invention discloses a cyclone type dust collector with a transverse dust barrel. The cyclone type dust collector comprises a dust collector body and the transverse dust barrel which are detachably connected. The dust collector body comprises an air inlet channel for connecting a dust collecting pipe with the dust barrel, an air outlet channel with one end connected with the other end of the dust barrel and communicated with the outside world, and a draught fan arranged in the air outlet channel. The dust barrel is located on the middle line of the dust collector. An air duct extending from one end of the dust barrel into the dust barrel and communicated with the air outlet channel is arranged on the inner wall of the dust barrel. Due to the fact that the air duct is arranged on the inner wall of the dust barrel, the sealing performance of the dust collector is ensured, and dust collecting efficiency is improved; meanwhile, the detachable dust barrel can make the dust barrel and the air duct in the dust barrel more conveniently cleaned; the dust barrel is arranged on the middle line of the dust collector, so the appearance of the dust collector is almost symmetrical and is more attractive.

A sealed terminal device for a motor-driven compressor has an electrically insulating terminal holder (12) to be attached to the housing wall (2a) of the motor-driven compressor, a plurality of sealed terminals (18) held in the terminal holder (12), for penetrating the housing wall (2a) with play to the housing wall (2a), and a groove (40) or cavity (38) formed in the terminal holder (12) to increase a creepage distance for insulation between the sealed terminals.

The invention relates to a bolt tightening force coefficient measuring method, and especially is suitable for tightening force coefficient measuring of an iron tower galvanizing bolt. The method comprises the following steps: demarcating a pressure transducer, connecting an iron tower bolt tightening force coefficient simulation testing device, installing the simulation testing device in a tensile testing machine, acquiring pre-tightening force data, and calculating a tightening force coefficient. The method can be realized in a laboratory; the operation is easy; the test result is accurate; and the guiding significance is provided to the iron tower integral structure and stability assessment.

The invention provides a seepage testing apparatus and method for rock with a single fracture, belonging to the technical field of laboratory rock seepage measurement equipment. According to the invention, the real three-dimensional morphology of the surface of a rock fracture is obtained through scanning, and authenticity of the single fracture included in a test piece is realized through 3D printing technology, so data obtained through experiments is more accurate, scientific and real; a detachable test piece loading seal chamber is designed in the invention and the contact surfaces of the test piece and the seal chamber are bonded via an epoxy resin adhesive, so sealing surrounding the test piece is guaranteed, water is only allowed to penetrate through the fracture of the test piece, and accuracy and authenticity of fracture seepage testing are guaranteed; adjustability of the fracture of the test piece in testing is realized by dismounting and replacing a sealing device loaded with test pieces with different fracture openness; and since the designed sealing device has the characteristic of compression resistance, the range of applicable hydraulic pressure of the apparatus can be greatly improved, so the change trend of penetration characteristics of fracture seepage under different hydraulic pressures can be accurately obtained.

The invention provides vacuum glass which comprises upper glass and lower glass, wherein the upper glass and the lower glass are convex glass or flat glass, an edge banding frame is arranged at the periphery of the upper glass, an edge groove is formed in the periphery of the lower glass, and the peripheries of the upper glass and the lower glass are welded together through a low-temperature solder material in a vacuum edge sealing furnace, and a closed vacuum layer is formed between the upper glass and the lower glass. The preparation method is simple; and the prepared vacuum glass and tempered vacuum glass can overcome the defects in the prior art, the gas tightness of the vacuum glass can be effectively ensured, and the strength and the heat insulation and sound insulation properties of the vacuum glass can be enhanced.

The invention discloses a gate valve device for a ventilating duct. The gate valve device for the ventilating duct comprises a valve body, a gate plate arranged in the valve body in a shutter way, an actuator arranged at one end of the inside of the valve body, a driving shaft connected with one end of the gate plate, a driven shaft connected with the other end of the gate plate through a rope, and a transmission mechanism used for connecting the driving shaft with the driven shaft, wherein the actuator and the driving shaft respectively penetrate through the side wall of the valve body, and the driving shaft is connected with the actuator; the actuator drives the driving shaft to clockwise or counterclockwise rotate to pull the gate plate to be opened, and the actuator drives the driving shaft to counterclockwise or clockwise rotate, and the driven shaft is driven by the transmission mechanism to rotate, so that the gate plate is pulled by the driven shaft through rolling the rope to be closed. The gate plate is embedded in the valve body, and does not interfere with other devices when being opened and closed, so that the valve sealing and space limitation problems are effectively solved.

The invention relates to a top-mounted ultra-low temperature ball valve, comprising a valve body, a valve seat assembly, a valve ball, a valve cap assembly and a valve rod assembly, wherein the valve seat assembly comprises a valve seat ring and a compression ring; a first mounting groove is formed on the valve seat ring; a seal ring is embedded in the mounting groove; a turnup is formed on the valve seat ring; a first circular bead and a second circular bead are arranged on the valve seat ring; a support bush and a spring disc are arranged between the first circular bead and the valve body; a pressure spring is embedded in the spring disc; the second circular bead, the valve body and the compression ring form an annular seal chamber; a spring energy-accumulation ring is mounted in the annular seal chamber; and a fireproof structure is arranged between the fitted surfaces of the valve seat ring and the valve body. The top-mounted ultra-low temperature ball valve is characterized in that the seal ring is fixed by the turnup structure on the valve seat ring, the valve seat and the valve body are sealed by the annular seal chamber and the spring energy-accumulation ring, and simultaneously the fireproof structure is arranged between the valve seat and the valve seat ring, and therefore, the tightness of the valve seat and the valve ball in fitting under the working condition of ultra-low temperatures is guaranteed; the jointed part of the valve seat ring and the valve body is reliably sealed; and the valve has safe fireproof function.

The wide mouth container bottle includes bottle bottom, bottle body as the main holding part, bottle neck and bottle mouth from the bottom to the top. The bottle neck is the transition section between the bottle body and the bottle mouth; the bottle bottom, bottle body and bottle neck are equal-wall thickness structure; and the bottle mouth has hem structure formed with the downward turned edge. The wide mouth container bottle has high strength bottle mouth, high sealing performance, no shrinkage and distortion, relaxed processing precision and high finished product rate.

The invention relates to a high-strength hot rolled steel plate for counter enameling and a manufacturing method thereof. The high-strength hot rolled steel plate for counter enameling comprises the following smelting components in weight percent: 0.012-0.03 percent of carbon (C), not greater than 0.10 percent of silicon (Si), 0.55-1.0 percent of manganese (Mn), 0.05-0.11 percent of phosphorus (P), not greater than 0.006 percent of sulfur (S), not greater than 0.005 percent of nitrogen (N), 0.08-0.20 percent of titanium (Ti), 0.005-0.055 percent of aluminum sulfide (Als), 5-15 percent of Ti/C and the balance of ferrum and inevitable impurities, wherein more than one or two of vanadium, boron (B), copper (Cu) and chromium (Cr) is selectively added. The manufacturing method comprises the following steps: producing a plate blank through continuous casting; evenly heating the plate blank to 1180-1260 DEG C; then, removing phosphorous with high-pressure water and carrying out rough rolling to prepare an intermediate blank; carrying out 5-7-pass finish rolling to target thickness; carrying out laminar flow cooling to 570-680 DEG C and coiling. The high-strength hot rolled steel plate for the counter enameling has no phosphorus explosion; the yield strength is higher than 280MPa after the high-strength hot rolled steel plate for the counter enameling is enameled under the conditions that the temperature is 800-920 DEG C and the thickness is greater than 8mm. The high-strength hot rolled steel plate for the counter enameling is suitable for roll forming, bend forming and simple punch forming and is a reliable special steel plate material for a counter enameling assembly structure.

The invention relates to a welding treatment process for a steel structure made of cold-rolled steel and particularly relates to a welding clamp for the steel structure made of the cold-rolled steel.The clamp comprises a clamp table, an adjustable steel part supporting mechanism, an alignment clamping mechanism and a pressing mechanism, wherein the adjustable steel part supporting mechanism comprises two supporting tables capable of moving in the opposite directions or moving in the opposite directions, each supporting table is provided with two aligning and clamping mechanisms, and each aligning and clamping mechanism comprises a clamping sliding plate, a clamping air cylinder, an aligning air cylinder and an aligning plate. The clamp can automatically clamp and align channel steel and T-shaped steel to be spliced and welded, manual adjustment is not needed, the time and labor are saved, an operation risk of workers during operation is reduced, in addition, the T-shaped steel can beautomatically pressed after alignment, the tightness of the attaching position is guaranteed, manual additional pressing is not needed, and welding dislocation can be prevented.

The invention discloses a packaging technology method of an IPMC (ionic polymer metal composite) material driver. The packaging technology is characterized by taking a PTFE membrane (Poly Tetra Fluoro Ethylene) as a packaging material, and bonding the IPMC and the PEFE membrane by PDMS (Polydimethylsiloxane). The technology process comprises four parts: (1) manufacturing an extraction electrode by using a conducting film material, and bonding the extraction electrode with the IPMC driver; (2) coating PDMS jelly on the surface of the PTFE film, and manufacturing an upper packaging membrane anda lower packaging membrane for packaging the IPMC driver; (3) clamping the IPMC driver with the extraction electrode between the upper packaging membrane and the lower packaging membrane, and drying and curing the packaged integral driver under a pressurization condition; and (4) processing the material after packaging. The technology provided by the invention is simple, and has low cost, and experiments prove that the packaged IPMC driver has stable performances, can be used for a long time in air, and has greater popularization value.

The invention discloses a vane-root platform double-wedge damp structure used for a turbine dynamic vane. The invention comprises a dynamic vane consisting of a round-belt, a vane body, a vane-root platform and a vane-root. Gaps are arranged on two circle side faces of the vane-root platform of the vane, and the wedge damp blocks are arranged in the gaps, and an outer end face and a radial face of the wedge damp block are equal in height. When the dynamic vane revolves, one face of the wedge damp block firmly presses an upper surface of the vane-root platform gap under an effect of the centrifugal force, and the other face firmly clings to the wedge damp block of a neighboring dynamic vane, and the positive pressure and the friction force on an interface of the wedge damp block lead the vane to form a damp wreathing structure. The structure can consume the energy of the vibration, and can ease and eliminate the vibration of the vane, and also can enhance the rigidity of the vane-root and reduce the dispersal of the proper frequency of the vane. The structure needs a little manufacturing work, and the manufacturing, assembling and disassembling are convenient. And the structure has good universal property for the quantity of the lock-port vanes, the static-stress strength of the vane and the general size are not increased.

The invention discloses a true three-dimensional physical model testing system for simulating a burst water disaster in a deep cavern. The true three-dimensional physical model testing system comprises a box-type sealed loading reaction device, an ultra-high-pressure true three-dimensional loading system, a servo control high-permeability hydraulic loading system, a tilt geological structure manufacturing system, a model cavern automatic excavation system and a model comprehensive testing and analysis system. The box-type sealed loading reaction device serves as a model test loading reaction device and is used for accommodating a model body and a high-pressure water body, wherein the ultra-high-pressure true three-dimensional loading system performs ultra-high-pressure true three-dimensional loading, the servo control high-permeability hydraulic loading system performs high-permeability hydraulic automatic loading, and the tilt geological structure manufacturing system is used for manufacturing the model body containing a tilt geological structure therein; and the model cavern automatic excavation system is used for automatically excavating a model cavern, and the model comprehensive testing and analysis system automatically acquires model test data and stores the model test data quickly. The true three-dimensional physical model testing system has broad application prospects in simulating burst water geological disasters in hydropower, transportation, energy and deep cavern in mines.

The invention discloses a design method of a double-curtain system used for preventing leakage of an oil and gas storage cavern. The design method comprises the following steps that first, detailed geological investigation data in a storage cavern area are obtained; second, a water curtain roadway is arranged above the storage carven; third, a plurality of water curtain holes are formed in the side wall of the water curtain roadway and comprise the horizontal water curtain holes or/and the vertical water curtain holes, the horizontal water curtain holes extend to the upper portion of the storage cavern from the water curtain roadway, and the vertical water curtain holes extend to the outer side of the storage cavern from the water curtain roadway; and fourth, the permeable rate of rock layers on the periphery of the storage cavern can be obtained by conducting packer tests through the water curtain holes, when the permeable rate of any area of the rock layers is larger than a preset permeable rate, a plurality of grouting holes extending between the water curtain holes and the storage cavern are formed in the peripheral wall of the water curtain roadway near the corresponding area to conduct grouting, and a seepage prevention curtain is formed. According to the design method, cracks in surrounding rock can be effectively closed, and oil and gas stored in the storage cavern are prevented from being leaked.

The invention provides a liquid crystal display panel. The liquid crystal display panel comprises a first glass substrate and a second glass substrate. Multiple spacing structures are arranged on the inner side of the first glass substrate, and frame glue is arranged on the periphery of the first glass substrate. A flat layer is formed on the inner side of the second glass substrate. A display region is arranged in the middle of the liquid crystal display panel. The frame glue is used for connecting the first glass substrate with the second glass substrate. The display region is arranged in the range defined by the frame glue. The area of the display region is smaller than that defined by the frame glue, and grid-shaped grooves are formed in the region between the outer edge of the display region and the inner edge of the frame glue. According to the liquid crystal display panel, the sealing performance between the first glass substrate and the second glass substrate can be guaranteed, the gap between the first glass substrate and the second glass substrate is not affected, and the phenomenon of non-uniform color or color differences of the periphery of the liquid crystal display panel is avoided.

The invention provides a laser-shock-based device for deformation connection of metal sheets and a method thereof. The device is composed of a laser emission system, a control system and a deformation connecting system. The laser emission system is composed of a pulsed laser device, a mirror, an adjustable focusing lens, a lens support and a base. The control system is composed of a laser controller, a computer, a hydraulic control system and a three-dimensional moving platform controller. The deformation connecting system is composed of an edge pressing device, a workpiece system, a combined female die, an automatic die opening and closing device and a three-dimensional moving platform. According to the laser-shock-based device, pulsed lasers are used as an energy source, deformation connection of two or more layers of the same or dissimilar metal sheets is achieved through the combined female die, the clamping-connection degree between the metal sheets is improved, and the connection strength is improved. The female die is automatically opened and closed through the automatic die opening and closing device, so that the work efficiency is improved; when the female die is closed, the laser-shock-based device has a self-locking function, so that the precision of deformation connection is guaranteed.

The invention relates to a corner connection (1), in particular for a drawer, having a first wall element (2) and a second wall element (3) arranged at an angle thereto, wherein there is a connector (4) that can be mounted on the first wall element (2) and has a receptacle for inserting the second wall element (3), characterized in that a holding element (5) can be inserted in the connector (4), by means of which the second wall element (3) can be fastened to the connector (4).

The invention discloses a method for sealing a large-dip-angle downward gas pressure determination drill hole. Through multiple plugging means, the phenomena of gas leakage and liquid leakage caused by that a downward hole is not tightly sealed can be avoided, the hole sealing quality can be improved, and the accuracy of determining gas pressure of a coal seam is guaranteed. The method comprises the following steps that firstly a large-dip-angle drill hole of which the diameter is 75mm is constructed towards a downward target coal seam from a tunnel; two discs are connected to the tail part of an antipriming pipe with bolts, and crude cotton yarns are clamped between the two discs so that a mop shape is formed; a pressure measuring pipe is conveyed into a specified drill hole position, and pebbles and coarse sand, with different particle diameters, are sequentially stuffed in the drill hole; finally the drill hole is filled with hole sealing slurry so that the drill hole is sealed. According to the method disclosed by the invention, the difficult problems that when polyurethane is used for blocking the slurry, the polyurethane is very fast to expand and is not easy to convey to a specified point and the hole sealing length is short are solved, and the difficult problems that the slurry blocking effect is not good, so that the slurry leaks into the hole bottom of the downward hole, and gas pressure measurement or extraction and exploitation of gas are influenced are also solved. The method disclosed by the invention has the advantages that the processes are simple, the reliability is high, the slurry blocking effect is good, the construction efficiency is high, the prices of the hole sealing materials are low, and the method is suitable for being widely used in mines.

The invention discloses an integral-assembling type heat-insulating oil pipe connection structure which comprises a box coupling, a factory end of an outer pipe, and a user end of the outer pipe, wherein the insides of the factory end and user end of the outer pipe are respectively hermetically welded with a pipe-body inner pipe, and a pipe-end inner pipe is arranged between a factory end of the pipe-body inner pipe and a user end of the pipe-body inner pipe, the two ends of the pipe-end inner pipe are connected with the factory end and user end of the pipe-body inner pipe by a seal butt joint structure, and a closed pipe-end heat-insulating cavity is formed between the pipe-end inner pipe and the factory end of the pipe-body inner pipe as well as the factory end of the outer pipe, the box coupling, the user end of the pipe-body inner pipe and the user end of the outer pipe; the inside of the pipe-end heat-insulating cavity is provided with a heat-insulating sleeve; and a seal structure is formed between the factory end of the pipe-body inner pipe and the pipe-end inner pipe as well as the user end of the pipe-body inner pipe, and can reduce the heat conduction, heat convection and radiation effects of the connecting part of the box coupling, thereby reducing the heat loss of the connecting part of the box coupling and improving the sealing performance of the connecting part of the box coupling, and the seal structure can prevent the occurrence of a problem that the box coupling is easy to corrode at high temperature.

The invention relates to a safe and anti-explosion cover plate for a power lithium battery. The safe and anti-explosion cover plate for the power lithium battery comprises a cover plate base plate with an anti-explosion hole, an anti-explosion valve running through the anti-explosion hole as well as a positive pole column and a negative pole column which are arranged on the cover plate base plate sequentially; the anti-explosion valve comprises a hollow anti-explosion main body, a valve cover sheet arranged at the opening position of the upper end of the anti-explosion valve main body, an anti-explosion film sheet arranged at the opening position of the lower end of the anti-explosion valve main body, a sealing sheet arranged at the middle section in the anti-explosion valve main body as well as a spring connected between the valve cover sheet and the sealing sheet; and a through hole is formed in the valve cover sheet. The safe and anti-explosion cover plate for the power lithium battery can guarantee the sealing property of the battery, also can reduce the use risk of the low lithium battery, and has the characteristics of reasonable structure, high safety, high sealing property, simplicity in manufacturing and the like.

The invention relates to a bundle wire kinking mechanism for a strip steel coil bundling machine, which mainly comprises a big bodywork, a small bodywork and an oil cylinder, and is characterized in that a positioning mechanism is arranged on the small bodywork capable of moving upwards and downwards along the big bodywork; driving roller wheels of the big bodywork are horizontally arranged on a horizontal rail of a stander of the bundling machine; a pedestal of the oil cylinder is fixedly arranged on the stander of the bundling machine, a piston rod of the oil cylinder is fixed at the bottom of the big bodywork, the pedestal of the oil cylinder is fixed on the big bodywork, the piston rod of the oil cylinder is fixed on the small bodywork, and the driving roller wheels of the small bodywork are in sliding contact with a vertical rail arranged on the big bodywork; the space between the head part of the right end of the positioning mechanism and the outer diameter of a strip steel coil is L1; and the space between the head part of the right end of the positioning mechanism and a central hole of the strip steel coil is L2, and the space between the head part of the right end of the positioning mechanism and two lateral surfaces of the strip steel coil is S. The bundle wire kinking mechanism has the advantages that the spaces between the positioning mechanism and the outer diameter as well as the central hole of the strip steel coil are adjustable, the spaces between the positioning mechanism and two lateral surfaces of the strip steel coil are adjustable, and the bundle wire kinking mechanism has simple devices, reliable performance and good stability.

The invention relates to the field of chemical engineering equipment, in particular to an environment-friendly efficient intelligent reaction kettle for liquid mixing reaction. The environment-friendly efficient intelligent reaction kettle for liquid mixing reaction comprises a reaction kettle body, a stirring unit, supply units, a power unit and a tail gas treatment unit, wherein the reaction kettle body can provide a reaction place for liquid reaction; the stirring unit is connected with the reaction kettle body; the supply units are uniformly arranged along the periphery of the reaction kettle body; the power unit is arranged under the reaction kettle body; the tail gas treatment unit can perform purification treatment on the waste gas generated in the reaction kettle body. The goal of controlling the supply condition of liquid materials in the chemical engineering production process can be achieved; the supply speed and the supply types of the materials in the chemical reaction can be conveniently regulated; the reaction efficiency is further improved; meanwhile, through the arrangement of the stirring unit, the multi-freedom rotation stirring of the liquid in the reaction kettle can be realized; the stirring efficiency is improved.

The invention relates to a clamping device for a bent axle fatigue test. The clamping device comprises an inner sleeve, an outer sleeve, a compaction sleeve and a vibrating plate, wherein a main journal of a bend axle is arranged in the inner sleeve, the outer sleeve is located in a through hole of the vibrating plate, two conical surfaces which bulge towards the middle are respectively arranged on the outer surface of the inner sleeve and the inner surface of the outer sleeve, two conical surfaces corresponding to the conical surfaces of the inner sleeve and the outer sleeve are correspondingly arranged on the compaction sleeve, the compaction sleeve is symmetrically arranged between the inner sleeve and the outer sleeve from two sides, a connecting bolt is arranged in the middle of the compaction sleeve, the two compaction sleeves move towards the middle through tensioning the connecting bolt on the compaction sleeve so as to extrude the inner sleeve to compact the main journal of the bent axle, the outer sleeve compacts the pore wall of the vibrating plate, and thus the purpose of firmly clamping a bent axle sample on the vibrating plate is realized. The clamping device is reasonable in structure, large in firmness of clamping the sample, and easy to dismantle, and is an ideal clamping device for the bent axle fatigue test.

The invention provides a dedusting pipeline for dust containing waste gas. The dedusting pipeline comprises a waste gas flowing pipeline and an ionization pipeline, wherein the waste gas flowing pipeline is formed by rotational connection of two same inner pipes; the end surfaces of the inner pipes are arc; the inner walls of the two inner pipes are respectively provided with a positive charge metal plate and a negative charge metal plate in a fit mode, and one ends, far away from the connection part, of the two inner pipes are provided with seal bars along the axial direction; the pipe walls of the inner pipes are also uniformly provided with ionization holes; the positive charge metal plates and the negative charge metal plates are uniformly provided with through holes corresponding to the ionization holes; the ionization pipeline similarly consists of two same outer pipes; the outer pipes are clung to the outer sides of the inner pipes, and the inner walls of the outer pipes are uniformly connected with ionization needles, and the ionization needles pass through the ionization holes and are fixed in the through holes; the ionization needles are also connected with a power supply wire. The dedusting pipeline is simple in structure, is easy to dismount and clean, can cool and remove dust containing air, is convenient for subsequent treatment, and is low in production and manufacturing costs.

The invention discloses a continuous pyrolyzing furnace, and relates to the technical field of pyrolyzing devices. The continuous pyrolyzing furnace comprises a hearth for pyrolyzing materials, a stirring spiral shaft arranged inside the hearth, a feeding mechanism connected with the hearth, a discharging mechanism connected with the hearth, and an exhaust opening wherein the feeding mechanism comprises a feeding shell and a feeding spiral shaft, the feeding spiral shaft and the feeding shell are matched and sealed, the discharging mechanism comprises a discharging shell and a discharging spiral shaft, the discharging shell and the discharging spiral shaft are matched and sealed, and the exhaust opening is used for exhausting pyrolysis gas generated during material pyrolysis. Continuous material pyrolysis is achieved, due to the fact that the feeding mechanism is filled with materials, and the discharging mechanism is filled with material residues, the sealing performance of the hearth can be ensured in the continuous feeding and discharging process, the temperature inside the hearth is kept constant, and pyrolysis gas generated by pyrolysis inside the hearth will not be lost from the feeding mechanism or the discharging mechanism.

The invention provides a butt-joint ring welding device used for new energy natural gas pipeline mounting, and relates to the technical field of natural gas pipeline welding. The problems that in thenatural gas pipeline butt joint process, although existing welding devices can rotate pipelines to achieve welding in the welding process, in the rotating process, welding seams can be possibly torn once the rotating speed of the pipeline at one end deviates, the rotating welding manner is prone to being influenced by welding wire winding, and in addition, in the welding process, due to the fact that the depth of welding seams cannot be controlled easily, leaking points are extremely prone to happening are solved. The butt-joint ring welding device comprises a base; and a lifting table is in fixed butt joint to the front end of the base. In the butt-joint ring welding device, due to the fact that antiskid wheels are rotationally mounted at the positions, corresponding to jacking mechanisms, on rotating pressing mechanisms, it can be guaranteed that natural gas pipelines at the left end and the right end can rotate synchronously in the rotating process, and welding seams are prevented from being torn.

The invention discloses a dust collecting device of communication equipment. The dust collecting device comprises a box body, wherein the bottom of the internal wall of the box body is fixedly connected with a storage battery, an air blower which is located at the right side of the storage battery is fixedly connected with the bottom of the internal wall of the box body, the top of the air blower communicates with an air inlet pipe, the surface of the air inlet pipe is fixedly connected with a dust detector, the top of the air inlet pipe penetrates through the box body and extends to the outside of the box body, one end, far away from the air blower, of the air inlet pipe is fixedly connected with a dust suction sleeve, a filtering water tank which is located at the right side of the air blower is fixedly connected with the bottom of the internal wall of the box body, the right side of the air blower communicates with the filtering water tank through the air inlet pipe, the top of the filtering water tank communicates with a water inlet pipe, and the top of the water inlet pipe penetrates through the box body and extends to the top of the box body. According to the dust collecting device of the communication equipment, through the air blower, the dust detector and the filtering water tank which are matched with one another, the problem of the traditional dust collecting devices that the normal operation of the communication equipment is affected due to poor dust removal effect is solved.

A buckle-type miniature rechargeable lithium battery structure member relates to the technical field of an electronic structure member and comprises an upper shell, a lower shell and a rubber ring, wherein the upper shell is buckled in the lower shell, and side walls of the upper shell and the lower shell are sealed by the rubber ring. By the buckle-type miniature rechargeable lithium battery structure member, the conflict between an explosionproof structure and a sealing structure in a traditional technology is solved, and the problems the pursuit of the explosionproof performance causes lowbattery assembly yield and the pursuit of the sealing performance causes low batter capacity are solved.

The present invention relates to an air filter outlet pipe seal structure of engine. It includes pipe self-body made of engineering plastics and sealing rubber cover. On the inner walls of connecting portions of two ends of said pipe self-body several positioning grooves are cut, on the sealing rubber cover several positioning projections which are correspondent to the above-mentioned positioning grooves are set, said invention utilizes the elasticity of rubber to make the rubber cover be fastened into the positioning groove of pipe self-body, so that the pipe self-body and rubber cover can be tightly combined together so as to implement the invented seal structure.