222results about How to "Strong enough" patented technology

The invention relates to the technical field of batteries, in particular to a battery cell and a battery pack. According to the battery cell, a first cover plate is provided with a pressure relief channel and a supporting boss; the pressure relief piece is mounted in the pressure relief channel; the blocking piece is arranged on the supporting boss, the blocking piece and the pressure relief channel are oppositely arranged in a spaced mode, a first pressure relief hole is formed in the blocking piece, and a second pressure relief hole is formed in the insulation protection piece; the effective opening area of the pressure relief piece is S1, the total area of the first pressure relief holes is S2, the total area of the second pressure relief holes is S3, S2 / S1 is larger than or equal to 1.22 and smaller than or equal to 1.3, and S3 / S2 / 1.6 is larger than or equal to 1.6 and smaller than or equal to 2. When the temperature of the battery cell is relatively low, the insulation protection piece has enough strength and ensures that the exhaust rate is not influenced; when the internal insulating part is fused and fails, and the pole group moves in the direction close to the pressure relief part, the baffle part can support the pole group to ensure the exhaust requirement, and can also prevent comburent in the battery cell from splashing outwards through the pressure relief part, so that the safety performance of the battery cell is improved.

The invention relates to the technical field of electronic ceramic materials, and particularly discloses a high-purity aluminum oxide ceramic substrate and a preparation process thereof. The high-purity aluminum oxide ceramic substrate is prepared from the following raw materials in parts by weight: 0.20 to 0.25 part of magnesium oxide, 0.35 to 0.55 part of zirconium oxide, 1.2 to 1.5 parts of dispersing agent, 60 to 65 parts of ethanol, 99.7 to 99.8 parts of aluminum oxide, 12 to 15 parts of adhesive, 6 to 9 parts of plasticizer and 50 to 55 parts of n-butyl alcohol, the adhesive is a mixture of polyvinyl butyral, water glass and modified paraffin. The prepared high-purity aluminum oxide ceramic substrate has excellent chemical stability and mechanical strength, and the obtained aluminum oxide ceramic substrate has better density, mechanical property and thermal stability by mixing various raw material components, and is not easy to break when subjected to bending load.

The invention discloses a multifunctional electronic product screen protective film and a preparation method thereof. The protective film comprises a modified base film and a multifunctional composite layer compounded on the surface of the modified base film, the multifunctional composite layer comprises an elastic buffer layer and a self-repairing layer which are sequentially arranged from inside to outside; wherein the elastic buffer layer is an elastic buffer layer with gradient density; the elastic buffer layer comprises the following components in parts by weight: 100 parts of a thermoplastic polyurethane elastomer, 15-25 parts of hollow glass microspheres, 10-15 parts of polyethylene glycol and 3-6 parts of an isocyanate cross-linking agent; the self-repairing layer comprises the following components in parts by weight: 100 parts of a dynamic reversible covalent bond polymer, 30-40 parts of phase change material microcapsules, 10-15 parts of nano cellulose, 5-8 parts of a near-infrared photosensitive initiator and 2-4 parts of an antioxidant. Compared with the prior art, the protective film provided by the invention has excellent scratch self-repairing performance, good adhesion and high anti-explosion screen performance.

The invention provides grinding equipment for a tong head. The grinding equipment comprises a supporting assembly, a grinding assembly and a bearing assembly. The grinding assembly is connected with the supporting assembly and arranged on the upper portion of the bearing assembly. The grinding assembly is provided with a driving mechanism and a grinding wheel, the driving mechanism is configured to drive the grinding wheel to move and rotate, the driving mechanism is provided with a second through hole, the grinding wheel is provided with a grinding disc and a cavity, the second through hole communicates with the cavity, and the cavity is configured to contain a lubricant; the bearing assembly is provided with a plurality of fixing grooves, the fixing grooves are connected with the fixing bases correspondingly, the fixing bases are configured to be used for installing to-be-polished tong heads, and the bearing assembly bears the fixing bases to rotate. The supporting assembly is designed to have enough strength and stability, enough supporting force is provided for the grinding assembly, and therefore the grinding precision and efficiency are guaranteed. A driving mechanism of the polishing assembly is designed to be capable of adjusting the position and the rotating speed of a polishing wheel so as to meet the polishing requirements of tong heads of different materials and shapes.

The invention discloses a torque transmission mechanism of a manipulator, which is applied between two adjacent joint centers of the manipulator, and comprises at least a first belt wheel and a second belt wheel which are respectively provided with a peripheral surface; the torque transmission belt comprises at least two layers of stacked transmission belts, at least one layer of transmission belt wraps the side face of the other adjacent layer of transmission belt, and each layer of transmission belt is provided with at least two installation ends. At least two mounting end parts of at least one layer of transmission belt are fixedly connected with two mounting end parts of the other adjacent layer of transmission belt respectively; relatively independent mobility is kept between the at least two layers of transmission belts in a connecting area formed between the mounting ends of the at least two layers of transmission belts. By the adoption of the scheme, it can be guaranteed that the size of the belt wheel in the mechanical arm is smaller to the maximum extent under the condition that the rated torque is met, and occupied space is smaller.

The invention provides a reinforcing device for a fabricated steel structure column and a construction method thereof.The reinforcing device comprises a bottom unit detachably connected with the ground through a connecting piece, the bottom face of the steel structure column is pressed on the bottom unit, and the bottom unit is provided with a clamping assembly used for being supported on the inner wall of the steel structure column; reinforcing units used for being clamped to the outer wall of the steel structure column are arranged on the two sides of the clamping assembly correspondingly, the height of each reinforcing unit is adjusted through a vertical driving assembly, and the distance between the two reinforcing units is adjusted through a transverse driving assembly. The bottom face of the steel structure column is completely attached to the bottom unit, the contact area of the bottom face of the steel structure column and the ground is indirectly increased, and therefore the overall stability of the steel structure column during installation and use is improved. The reinforcing positions of the reinforcing units and the steel structure columns are adjusted through the vertical driving assemblies, reinforcing of the reinforcing units and the steel structure columns with different inner diameters can be adjusted through the transverse driving assemblies, the application range is wide, and operation is accurate.

The invention discloses an impact type rotating wheel hollow water bucket structure and a manufacturing method thereof, and relates to the technical field of hydroelectric power generation, in particular to the manufacturing method of the impact type rotating wheel hollow water bucket structure, which comprises the following steps: S1, preparing an impact type rotating wheel hub and a water bucket root solid area through forging, milling, polishing and other process means; s2, calculating a water bucket hollow part model through the working stress of the rotating wheel; and S3, the prepared rotating wheel hub is clamped to a positioner, and according to the model calculated in the above steps, the additive manufacturing of the rotating wheel hollow water bucket is achieved by continuously and cooperatively adjusting the spatial position of the rotating wheel and the posture of a welding gun. The invention has the advantages of reducing the weight, improving the stability, reducing the inertia, prolonging the service life, saving the cost, promoting the sustainable development, optimizing the structural design, improving the performance, improving the efficiency, reducing the energy consumption, being convenient to manufacture and maintain and enhancing the adaptability.

The invention provides a turbine blade structure and a preparation method thereof, and relates to the technical field of turbine.The turbine blade structure comprises a mounting base, a plurality of mounting holes are formed in the outer side of the mounting base, a plurality of blades are placed in the mounting holes, and first through holes are formed in the ends, located on the inner side of the mounting base, of the blades; the first through holes are connected through connecting rings, and the connecting rings are connected through first bolt assemblies. Blades are placed in the mounting holes and then are connected through the first bolt assemblies of the connecting rings, and therefore the problems that in the background technology, blades of an existing turbine impeller are difficult to disassemble and assemble and inconvenient to maintain and periodically check and replace, the size of the blades of the existing turbine impeller cannot be adjusted, and the size of the blades cannot be adjusted are effectively solved. And the technical problem that blades with different sizes cannot be flexibly used under different use conditions of the steam turbine is solved.

The high-strength composite corrugated board is characterized by comprising an inner paper layer, a flexible composite layer, an adhesive paper layer, a paper core, a buffer foam board, a reinforced composite layer and a surface paper layer which are sequentially arranged from top to bottom, the upward waveform of the paper core is of a parabola-shaped top structure, and the downward waveform of the paper core is of a triangular vertex angle structure. The corrugated board has the beneficial effects that the compression resistance and the strength of the outer side and the stress buffering performance of the inner side are guaranteed, the overall strength and the bending resistance of the corrugated board are enhanced, the bonding strength is guaranteed by providing a new formula of the flame-retardant polyurethane foam and the waterproof polyurethane adhesive and a combined use method, and the service life of the corrugated board is prolonged. The toughness and the buffering effect are enhanced, the toughness and the pressure bearing capacity of the paperboard are enhanced, and meanwhile the excellent waterproof and flame-retardant effects are guaranteed.

The utility model relates to the technical field of breaking accessories, in particular to a breaking hammer damping rod which comprises a breaking hammer and a drill rod connected to the top of the breaking hammer, and a top sliding seat is installed in the drill rod in a sliding mode. The first groove and the second groove are formed in the drill rod, and the reset spring and the steel column are installed in the first groove and the second groove, so that an effective vibration reduction mechanism is formed. When the breaking hammer is impacted, the steel column can slide in the first groove, meanwhile, the reset spring is compressed, impact energy is absorbed through elastic deformation of the spring, and the damping effect is further enhanced through the arrangement of the hard spring. The top sliding seat is wound on the outer wall of the steel column in the second groove, and the top and the bottom of the top sliding seat are fixedly connected with the bottom of the second groove respectively. When the top sliding seat slides in the drill rod, the hard spring deforms, so that more impact energy is absorbed, and vibration transmitted to the breaking hammer is further reduced.

The invention provides a diamond wire bus and a diamond wire, the diamond wire bus comprises a base body and a coating layer covering at least part of the surface of the base body, the coating layer comprises a first metal layer, and the first metal layer covers at least part of the surface of the base body; the second metal layer covers at least part of the surface, far away from the substrate, of the first metal layer; the third metal layer covers at least part of the surface, far away from the first metal layer, of the second metal layer; wherein the first metal layer comprises first metal, the second metal layer comprises second metal, and the third metal layer comprises third metal and fourth metal; the content of third metal in the third metal layer increases progressively in the direction away from the second metal layer; the fourth metal and the second metal are the same metal. The outer surface of the third metal layer can keep sufficient strength and cannot fall off while achieving a lubricating effect, and the inner surface of the third metal layer is combined with the second metal layer, so that the cutting process of hard and brittle materials can be continuously carried out, and the cutting yield is improved.

The invention belongs to the technical field of underwater construction materials, and particularly relates to a self-leveling anti-dispersion underwater bottom sealing material and a preparation method thereof. The self-leveling anti-dispersion underwater bottom sealing material disclosed by the invention is prepared from the following components in parts by weight: 530 to 730 parts of sulphoaluminate cement, 77 to 277 parts of ordinary Portland cement, 84 to 126 parts of fly ash, 870 to 950 parts of fine aggregate, 250 to 278 parts of water, 18 to 23 parts of a water reducing agent, 6 to 10 parts of a flocculating agent, 8 to 12 parts of a retarder, 0.9 to 1.4 parts of a de-foaming agent and 0.1 to 0.4 part of an early strength agent. The self-leveling dispersion-resistant underwater bottom sealing material disclosed by the invention has good fluidity and dispersion resistance.

The invention discloses lyocell spinning equipment which comprises a coagulating bath tank used for containing coagulating bath liquid; at least partial section of the wire guide pipe horizontally extends, one end of the wire guide pipe is provided with a liquid inlet communicated with the coagulating bath tank, and the other end of the wire guide pipe is provided with a wire outlet; the spinning nozzle is arranged above the coagulating bath tank, a spinning opening of the spinning nozzle faces a tank opening of the coagulating bath tank, and tows sprayed out of the spinning opening enter the coagulating bath tank to be preliminarily coagulated, then enter the yarn guide pipe to be coagulated and then are pulled out of a yarn outlet of the yarn guide pipe. According to the invention, through the cooperation of the coagulating bath tank, the spinning nozzle and the wire guide pipe, the optimized design of the spinning equipment is realized, the spinning nozzle sprays the fibers into the coagulating bath tank for preliminary solidification, then the tows enter the wire guide pipe, and the horizontal extension section of the wire guide pipe prolongs the retention time of the fibers in coagulating bath liquid, so that the fibers are ensured to be fully solidified; and the mechanical property and the quality consistency are improved.

The invention discloses a low-swing high-efficiency homogenizing stirring structure and a stirring method, and fully considers that single-side glass flows into a stirring tank, nonuniform acting force is generated on a stirrer, long-term stable operation of the stirrer is influenced, and single-side flowing-in glass liquid is easy to form a viscosity-temperature segregation phenomenon at a near end; and the influence on the homogenization effect is weakened. The acting force transition of fluid before the fluid enters the stirring tank body is realized by adding the special-shaped buffer pool, and molten glass is continuously injected into the stirring tank in a 360-degree overflow manner, so that the rotation stability of the whole stirrer is remarkably improved, and full guarantee is provided for long-life reliability and high-flow efficient homogenization of equipment. According to the stirrer, uniform stress of molten glass on the stirrer in the circumferential direction can be realized, the problem of abnormal swinging of the stirrer in the operation process is remarkably improved, high-flow molten glass is efficiently homogenized, and an equipment guarantee is provided for manufacturing of high-flow substrate glass.

The utility model provides intelligent cooking equipment which comprises a cooking cavity, a heating module used for heating the cooking cavity, a sound control acquisition module used for detecting cooking sound in the cooking cavity and a detection module, and the sound control acquisition module and the heating module are electrically connected with the detection module. When the heating module works, the sound control collection module detects sound signals generated in the cooking process and transmits the sound signals to the detection module, and the detection module controls the heating module to be turned on or turned off according to the sound signals collected by the sound control collection module. Specifically, a sound signal generated in the cooking process is detected through a sound control acquisition module, the cooking state of food can be monitored in real time, the problem of excessive or insufficient cooking caused by traditional timing control is avoided, the cooking quality is improved, unnecessary energy waste is avoided, and the energy utilization efficiency is improved; and the user does not need to manually adjust the cooking time or frequently check the cooking state, so that the use convenience and the user experience are improved.

The invention provides a light energy and wave energy combined power generation device for an offshore area and a use method, the light energy and wave energy combined power generation device is characterized by comprising a plurality of groups of power generation assemblies, and a limiting part is connected between every two adjacent groups of power generation assemblies; the power generation assembly comprises installation assemblies placed on the sea surface, the adjacent installation assemblies are connected through limiting parts, photovoltaic panels are installed at the top positions of the installation assemblies, the installation assemblies are connected with connecting arms, and the connecting arms are provided with arch-shaped elastic structures. One end of the arch-shaped elastic structure is fixedly connected to the position, close to the mounting assembly, of the connecting arm, the arch-shaped elastic structure is movably connected to the connecting arm, the end, connected with the connecting arm, of the arch-shaped elastic structure is connected with a wave energy power generation assembly, and the adjacent wave energy power generation assemblies are also connected through a limiting part; a fixing part is connected to the position, close to the connecting arm, of the bottom of the mounting assembly and fixed to the seabed. The device combines light energy and wave energy for power generation, and improves the efficiency of energy collection in offshore areas.

The invention relates to the field of fiber concrete manufacturing, in particular to a fiber concrete manufacturing method and device.The fiber concrete manufacturing device comprises a shell, an extrusion block is slidably connected to the upper portion of the interior of the shell in a sealed mode, a telescopic assembly for driving the extrusion block to move is arranged above the extrusion block, and a stirring bin located in the shell is arranged below the extrusion block; a feeding opening communicated with the interior of the stirring bin is formed in the outer wall of one side of the shell, and a discharging assembly communicated with the interior of the stirring bin is mounted on the outer wall of the other side of the shell; the first stirring mechanism is arranged at the upper end of the shell, the second stirring mechanism is arranged at the lower end of the shell, and the first stirring mechanism and the second stirring mechanism are both used for stirring materials in the stirring bin. Through the arrangement of the structure, the possibility of material bonding can be effectively reduced, the fluidity of concrete during stirring is guaranteed, meanwhile, the chemical reaction rate of cement is increased, and the overall coagulation effect of the concrete is improved.

The invention discloses a wheel disc integrity test method, a test tool and a test device. The wheel disc integrity test method comprises the following steps: carrying out temperature calibration on a wheel disc test temperature; determining a wheel disc integrity test rotating speed; and setting a temperature control value according to a temperature calibration result, when the temperature of the wheel disc reaches an examination temperature, starting the test device to drive the wheel disc to rotate at a high speed to a test rotating speed Ntest, and stably running at the rotating speed for not less than 5 minutes. According to the invention, temperature calibration is carried out on the test temperature of the wheel disc, the wheel center examination temperature is taken as a reference, a temperature control value is set according to a temperature calibration result during a formal test, and the temperatures of the wheel center and the outer surface of the wheel disc reach the examination temperature and meet examination requirements; meanwhile, the wheel disc integrity test rotating speed is determined, and correction of material performance, dimensional tolerance and test device rotating speed control precision on the test rotating speed is considered, so that the test load is close to the actual load of the wheel disc on the engine.

The invention discloses oyster shell powder processing and crushing equipment and a crushing method thereof. The crushing equipment comprises a machine shell, a crushing device and a crushing device, wherein the machine shell is provided with a crushing cavity; the crushing mechanism comprises a group of crushing rollers rotationally mounted in the crushing cavity, the outer side walls of the group of crushing rollers are fixedly connected with crushing convex blocks respectively, and the crushing convex blocks on different crushing rollers are arranged in a staggered manner respectively; the crushed material reinforcing mechanism comprises a fixed supporting piece, the fixed supporting piece is inwards and fixedly connected with an arc-shaped limiting plate, and the arc-shaped limiting plate is fixedly connected with a corresponding ultrasonic transducer; the material crushing protruding blocks are arranged in a hollow mode and fixedly provided with corresponding abutting pieces, and the inner ends of the abutting pieces make contact with the arc-shaped limiting plates when rotating to pass through the arc-shaped limiting plates. According to the oyster shell crushing device, vibration energy can be effectively applied to the crushing convex blocks which rotationally pass through the opposite sides of the group of crushing rollers, so that the crushing effect and the crushing efficiency of oyster shell materials are effectively improved.

The invention relates to the technical field of battery packs, and discloses a bottom protection structure for a battery pack and the battery pack, the bottom protection structure for the battery pack comprises a liquid cooling plate, a bottom protection plate and a buffer layer; the bottom of the liquid cooling plate comprises a non-flow channel area and a protruding flow channel area; the bottom protection plate is arranged at the bottom of the liquid cooling plate, and the bottom protection plate and the liquid cooling plate are arranged at intervals; the buffer layer is arranged between the liquid cooling plate and the bottom protection plate, and the bottom of the buffer layer abuts against the bottom protection plate; in the flow channel area, the top of the buffer layer abuts against the liquid cooling plate; according to the present invention, the impact force can be effectively absorbed and dispersed when the different regions of the battery pack are impacted so as to ensure that the battery cells in the battery pack are not extruded when the battery pack is subjected to the external force effect, such that the battery pack can be prevented from being damaged, and the battery pack is prevented from being damaged. And the protection level of the battery cells in the battery pack is improved, and the overall safety of the battery pack is ensured.

The invention discloses a boiler hanging device, and relates to the field of boiler hanging. Comprising a walking chassis mechanism, a supporting frame fixed above the walking chassis mechanism and an extension arm extending out of the upper end of the supporting frame. A plurality of groups of winches are mounted on the extension arm, slings on the winches penetrate through the pulley block to be connected with a clamping assembly, and the outer side of the boiler body is wrapped with the clamping assembly through steel cables; the clamping assembly comprises a clamping base at the bottom, a shaft rod installed in the clamping base and a driven assembly installed above the shaft rod. The clamping assembly adopts a unique eccentric disc and driven assembly structure, a shaft rod is driven by a driving motor to rotate, so that a clamping pad is tightly attached to the outer side of the boiler body, a steel rope is wound by a steel rope winding disc to form an enclosure structure to clamp the boiler, the boiler is effectively prevented from shaking or sliding off in the hoisting process, and the hoisting safety is greatly improved.

The utility model discloses a boiler flue gas duct for fine construction, which belongs to the field of boiler flue gas ducts and comprises a flue gas duct wall, a support plate, support legs, a clamping plate, an angle steel belt, a thermal insulation layer, a reinforcing mesh and a protective layer. The specification and the size of the flue wall are determined according to data statistics, uniform blanking, prefabrication and splicing part division are carried out, finally hoisting and assembling are carried out on site, after the flue wall is assembled and spliced, the heat preservation layer is installed on the flue wall, and the heat preservation layer carries out heat preservation and heat insulation on the flue wall. The reinforcing mesh on the inner side of the heat preservation layer can increase the firmness of the heat preservation layer plate and prevent the heat preservation layer from cracking, the protection layer is fixed to the clamping plate after the heat preservation layer and the clamping plate are installed, the functions of rain prevention, wind shielding and the like are achieved for the clamping plate and the heat preservation layer, fine construction is conducted on installation of the smoke and air duct, and the smoke and air duct has enough strength, rigidity and stability. Strong vibration is avoided, the construction quality is improved, and the construction efficiency is guaranteed.

The utility model relates to the technical field of PVC (polyvinyl chloride) pipe fittings, and discloses a pipe fitting for preventing floor drain fault, the main body structure of the connecting pipe fitting consists of an upper end pipe, a middle section secondary drainage pipe and a lower end pipe, and the structure is precise, reasonable and easy to implement. The research and development of the anti-fault pipe fitting not only can effectively prevent drainage of the floor drain from scouring a sand-lime layer, but also can enable water of the sand-lime layer to be smoothly discharged into a sewer line, and even can effectively prevent sand-lime from falling into the sewer line to cause blockage of the sewer line when the floor drain is installed in the decoration tiling stage; the filter net basket is fixed to the inner ring of the mounting ring, impurities are further filtered out, the anti-blocking effect is enhanced, the supporting columns and the mounting ring are connected through the tightening springs, and when water flow impact or external force is applied to the pipe fitting, the supporting columns can guarantee the stability of the filter net basket and the mounting ring and maintain the filtering and drainage performance of the pipe fitting by means of telescopic buffering of the tightening springs; and the home decoration drainage requirement is comprehensively met.

The utility model relates to a wheel technology field, concretely relates to a detachable wheel, including tyre, the inner ring of tyre is equipped with wheel cover, and tyre and wheel cover outer circle seal setting form a plenum, and the inner ring of wheel cover is evenly arranged with countersunk mounting hole along the circumference, and wheel cover is equipped with detachable wheel hub, and detachable wheel hub includes wheel hub outer circle cooperation installation with the inner ring of wheel cover, and wheel hub outer circle is equipped with wheel hub hub core, and the between wheel hub outer circle and wheel hub hub core along the circular center radiation spreads apart a plurality of spoke, and the between two adjacent spokes is equipped with detachable assembly cooperation with countersunk mounting hole. Independent plenum, will not leak in the wheel cover and wheel hub dismounting process. Wheel hub is through detachable assembly and realizes detachable, when wheel hub outer circle, wheel hub hub core or spoke etc. component appears damage, need not to replace whole wheel, only need to dismount and replace damaged wheel hub part, dismount convenient, greatly shorten the maintenance cost and maintenance time short.

This invention belongs to the field of downhole tools for oil drilling, specifically relating to a cycloidal gear reverser. The cycloidal gear reverser has an input shaft rotatably mounted within a housing. The lower end of the input shaft is fixedly connected to the upper end of an eccentric shaft assembly. A cycloidal wheel is fitted onto the eccentric block of the eccentric shaft assembly, and the circumferentially arranged external teeth of the cycloidal wheel connect with the internal teeth arranged on the inner wall of the housing. The upper end of a pin assembly is connected to the cycloidal wheel, and the lower end of the pin assembly is fixedly connected to an output shaft, which is rotatably mounted within the housing. The cycloidal gear reverser of this invention, through the cooperation of the eccentric shaft assembly, cycloidal wheel, and pin assembly, achieves higher strength, not only improving service life but also increasing the reverse torque transmitted to the stuck fish, thereby improving the efficiency and effectiveness of fish unblocking and expanding the range of wellbore sizes that the reverser can be used in.

Battery pole piece assembling equipment comprises a conveying device, a first feeding device, a feeding mechanical arm, a second feeding device, a third feeding device, a turnover device, a fourth feeding device and a hot pressing device. The bottom plate is arranged on the three-axis linear module and is driven by the three-axis linear module to reciprocate in the X-axis direction, the Y-axis direction and the Z-axis direction, and a plurality of suction holes communicated with an external air source are formed in the bottom plate; the pressing roller is located beside the bottom plate, arranged on the three-axis linear module and driven by the three-axis linear module to move in a reciprocating mode in the X-axis direction, the Y-axis direction and the Z-axis direction. In the assembling process of the first sheet and the second sheet, the first sheet and the second sheet can be pressed in advance, so that the first sheet and the second sheet are firmly and compactly connected with each other, and the assembling efficiency of the first sheet and the second sheet is improved. And enough strength and reliability of the pole piece are ensured.

The invention relates to the field of indoor ski field construction, and discloses a method for fixing wheel type construction machinery on a ski track of an indoor ski field, which comprises the following steps: S1, designing a support device, and comprehensively considering the inclination angle of a concrete slope of the ski track, the load of external mechanical equipment of the support device and indoor environment factors; the method comprises the steps of S1, determining a preliminary model and material selection of an expected supporting device according to finite element software and Tekla software, S2, arranging construction positions, and taking a BIM model of a whole construction site as a reference, S3, machining and transporting the device, S4, fixing a device base, and S5, installing and fixing a machine. The supporting device is combined in a channel steel welding mode, base installation and chemical bolt configuration are accurately arranged and determined, a machine is accurately clamped through a track connecting piece and a car stop positioner, it is guaranteed that the supporting device and the machine are stable and safe, loads are dispersed, displacement and sliding are prevented, the construction quality is improved, and the accident possibility is reduced; and the effect of guaranteeing construction safety and flexibility is achieved.

The three-way vibration isolator comprises an upper foot margin piece, a lower foot margin piece and spokes, and the upper foot margin piece serves as an upper supporting structure of the three-way vibration isolator and is used for being connected with a machine case; the lower foot margin piece serves as a lower supporting structure of the three-way vibration isolator and is used for supporting a fan; the spokes are connected with the upper foot margin piece and the lower foot margin piece to form a main body structure of the three-way vibration isolator; the upper foot margin piece and the lower foot margin piece are parallel, an upper foot margin piece hole is formed in the piece face of the upper foot margin piece and connected with a machine box through a bolt, a lower foot margin piece hole is formed in the piece face of the lower foot margin piece and connected with a fan through a bolt, and the upper foot margin piece and the lower foot margin piece are connected through a bolt. The upper foot margin piece, the lower foot margin piece and the spokes are each of a hollow structure, each hollow structure comprises an opening, the spokes are elastic, the upper foot margin piece and the lower foot margin piece are each of a structure with a certain thickness and rigidity, and the device solves the current problems of high cost and poor vibration isolation performance.

The utility model relates to the field of plate connection, in particular to a closely-spliced wallboard connecting structure. The embedded part comprises an embedded part, a plastic strip and a clamping part, the embedded piece is provided with a clamping and embedding groove a; the plastic strip is clamped and embedded in the clamping and embedding groove a and is provided with a clamping and embedding groove b; the clamping piece is provided with one or two clamping and embedding head parts capable of being clamped and embedded into the clamping and embedding grooves b, and is provided with abutting plate parts with the number equal to that of the clamping and embedding head parts. The device is high in strength, convenient to install, compact in structure and small in occupied space.

The application discloses a particulate matter sensor and an air treatment device. The particulate matter sensor comprises a shell, a gas flow passage for a to-be-detected gas containing particulate matter is formed in the shell; a gas flow generating piece is in communication with the gas flow passage, the gas flow generating piece can drive the to-be-detected gas to pass through the gas flow passage, and a preset wind speed V of the gas flow generating piece satisfies 0.5 m / s≤V≤3 m / s; and an optical detection assembly is arranged in the shell, the optical detection assembly is used for generating a detection light beam, the detection light beam forms a light detection area at an intersection with the gas flow passage, the light detection area has a preset area S, S satisfies 16 mm 2 ≤S≤100 mm 2 , and the optical detection assembly outputs an electrical signal about a particulate matter concentration value according to the detection light beam scattered by the particulate matter.