50results about How to "Avoid direct action" patented technology

The utility model provides a battery pack. The battery pack comprises: a battery box having a first mounting cavity; the battery module is mounted in the first mounting cavity, the battery module comprises a plurality of battery cells which are arranged in sequence, an anti-explosion valve is arranged at the top of each battery cell, a pressure discharge channel is arranged in the battery box, and the pressure discharge channel is communicated with the outside of the battery box; and the gas guide structure is located above the battery module, the gas guide structure comprises a gas guide channel and a plurality of openings communicated with the gas guide channel, the plurality of openings are arranged corresponding to at least part of the explosion-proof valves, and the gas guide channel is communicated with the pressure discharge channel. The battery pack provided by the technical scheme of the utility model can effectively reduce the probability of heat diffusion.

The invention provides an anti-pricking noise-reducing tire and a preparation method thereof, and relates to the technical field of tires, the anti-pricking noise-reducing tire comprises a tire main body composed of a hub and an outer tire, a cavity is formed between the hub and the outer tire, and the anti-pricking noise-reducing tire further comprises an elastic anti-pricking layer and a self-repairing layer; through the arrangement of the rubber buffer ring, the metal microporous net, the anti-impact layer and the like, the protection layer capable of flexibly changing is arranged in the tire, after the spines penetrate through the outer tire, the flexible protection layer deforms along with the movement tracks of the spines and wraps the spines, and the tire cannot leak air; and aiming at the impact force caused by the spines to the elastic anti-puncturing layer, the anti-impact liquid in the anti-impact layer is instantly changed into a solid-like state from a liquid state, so that hard support is provided for the metal microporous net and the impact force is absorbed, and the anti-puncturing property of the tire is further improved.

The present invention relates to a display assembly module. It comprises: a frame assembly, comprising a main body and a wing portion, the wing portion is connected to the edge of the main body, the wing portion and the main body are jointly arranged to form a sink, the main body has a first inner surface, the wing portion has a second inner surface, the first inner surface and the second inner surface jointly define the boundary of the sink; and a screen assembly, embedded in the sink and abutting against the wing portion. It can be ensured that the part embedded in the sink will not occupy the dimension of the entire display assembly module in the thickness direction. On the basis of the constant total thickness dimension of the screen assembly, the height of the screen assembly protruding relative to the frame assembly is reduced, thereby reducing the thickness of the entire display assembly module, making the structure of the entire display assembly module more compact. At the same time, the wing portion of the frame assembly will form a good protective effect on the part of the screen assembly located in the sink.

The invention discloses a settlement monitoring device and system for an underwater building in a river channel and a laying method, belongs to the technical field of settlement monitoring, and can solve the problem that an existing settlement monitoring device is not suitable for settlement monitoring of the underwater building. The device comprises a plurality of settlement meters which are arranged on a plurality of monitoring points of an underwater building in a river channel in a one-to-one correspondence manner; the liquid storage tank is arranged in the river channel and is communicated with the plurality of settlement meters through a plurality of liquid passing pipes; the plurality of liquid passing pipes are in one-to-one correspondence with the plurality of settlement meters; the liquid storage tank, the plurality of liquid passing pipes and the plurality of settlement meters are filled with liquid; the plurality of first protection structures are in one-to-one correspondence with the plurality of settlement meters; the first protective structures cover the corresponding settlement meters and are used for isolating the corresponding settlement meters from water; and the second protection structure covers the liquid storage tank and is used for isolating the liquid storage tank from water. The device is used for monitoring the settlement deformation of the underwater building in the river channel.

The utility model relates to a high stability temperature compensation quartz crystal oscillator, including the crystal base and the lower ceramic base of upper and lower stacking, the crystal base lower part has an upper recess, and the compensation chip is installed in this upper recess, the lower ceramic base upper part has a lower recess, and the quartz chip is installed in this lower recess, and the upper recess and the lower recess butt joint and splice to form an inner chamber, and the quartz chip includes quartz wafer, the quartz wafer is composed of fixed section wafer and turning section wafer, and one end of the fixed section wafer is provided with the bending turning section wafer. The utility model can reduce the difference between the temperature perceived by the compensation chip and the environmental temperature of the quartz wafer, provide accurate temperature compensation frequency, achieve the high stability of the frequency when temperature transient, and the quartz wafer with corner structure is designed, and under the double action of the corner structure and the partition through -hole, the stability of the quartz wafer work can be effectively improved.

The invention discloses a cantilever type automatic loading device, which belongs to the field of liquid loading and unloading arms and comprises a stand column, a loading arm body is arranged on one side of the stand column and comprises a liquid-phase inner arm, a liquid-phase outer arm and a plumbing arm which are connected in sequence, and the liquid-phase inner arm and the liquid-phase outer arm are connected through a bent pipe and a rotary joint. The liquid-phase inner arm, the liquid-phase outer arm and the bent pipe are all double-layer sleeves, a plurality of temperature control heating modules are arranged in the inner sleeve, an electromagnetic coil is arranged between the inner sleeve and the outer sleeve, and after the electromagnetic coil is powered on, an alternating magnetic field can be generated to penetrate through the inner sleeve to inductively heat the temperature control heating modules so as to heat a medium in the inner sleeve. Materials can be rapidly heated to a flowing state, and the loading efficiency is improved. Meanwhile, due to the fact that the heating process is accurate and controllable, it can be guaranteed that the materials are kept at the stable temperature in the conveying process, the solidification or blocking problem caused by temperature fluctuation is solved, and the heating device has remarkable advantages and wide application prospects in practical application.

The utility model discloses a disengagement device for a lightning arrester, which relates to the technical field of lightning arresters and comprises a disconnector and a protective cover covering the disconnector, the protective cover is fixedly connected with the disconnector through a fixing assembly, screw rods are arranged at two ends of the disconnector, and the protective cover is fixedly connected with the disconnector. Nuts and conducting strips are movably arranged on the outer rings of the two screw rods, the conducting strip on the upper portion is electrically connected with an external high-voltage wire through a first wire, and the conducting strip on the lower portion is electrically connected with the high-voltage end of an external lightning arrester through a second wire. According to the utility model, when the lightning arrester is damaged, the separation device acts, and burst fragments are blocked by the protective cover, so that the explosion range is effectively reduced, the damage to surrounding equipment is reduced, and the problem that the burst fragments are easy to splash to the periphery to damage the surrounding equipment after the separation device for the lightning arrester bursts is solved.

The utility model provides a special sleeve for ambulatory blood pressure cuff, including suite and turning fixed piece, suite includes suite body and turning body, the turning body is connected to the lower end of suite body, suite body includes suite inner surface and suite outer surface, suite inner surface is used for contact skin, the suite outer surface is used for contact skin, the suite outer surface is used for contact skin, and the suite outer surface is used for contact skin. The outer surface of the kit body is used for mounting a cuff, and the overturning body can be overturned upwards from the lower end of the kit body to the outer side of the kit body, so that the bottom of the cuff is arranged between the kit body and the overturning body; the overturning fixing piece is fixed to the overturning body which is overturned upwards, the skin and the cuff are isolated, and meanwhile the comfort level and safety are enhanced.

This utility model discloses a support frame for safe production in coal mines, including two symmetrically arranged bases. Hydraulic supports are fixedly mounted on the upper surfaces of both bases, and a lifting plate is fixedly mounted between the upper ends of the hydraulic supports. A bearing plate is fixedly mounted on the upper surface of the lifting plate. Side guard plates are hinged to both sides of the bearing plate, and an arc-shaped buffer assembly connects the bottom surface of the side guard plates and the bottom surface of the bearing plate. A top guard plate is connected to the upper surface of the bearing plate via four sets of cross-shaped buffer mechanisms. This utility model effectively protects against falling rocks by hinged side guard plates on both sides of the bearing plate and the installation of arc-shaped buffer assemblies. The top guard plate is connected to the upper surface of the bearing plate via four sets of cross-shaped buffer mechanisms. The slider in the buffer mechanism can slide on the slide rod, and in conjunction with the springs on both sides, effectively absorbs and disperses the impact force when the top surface is impacted by falling rocks, preventing the impact force from directly acting on the support frame and preventing damage to the support frame due to excessive force.

The utility model discloses a driving system for a high-pressure hose roller, which comprises a vertically arranged driving motor, a speed reducer connected to the driving motor, a pinion connected to a horizontal output shaft of the speed reducer and a large gear ring meshed with the pinion, teeth are arranged on the inner ring of the large gear ring, and the periphery of the large gear ring is fixedly connected with the roller. A high-pressure hose is wound on the roller, an eccentric disc is further arranged on the speed reducer, the inner circle of the eccentric disc is connected to the speed reducer through a plurality of mounting holes in the periphery, and the outer circle of the eccentric disc is connected to the roller base through a plurality of mounting holes in the periphery. The center of the inner circle rotates around the center of the outer circle, so that the center distance between the small gear and the large gear ring is adjusted to be within a designed range to achieve normal meshing. By arranging the eccentric disc, the center distance of the gear set can be adjusted, the assembly precision is improved, the meshing smoothness of the gear set is ensured, and the service life of equipment is prolonged.

The utility model discloses a kind of firm terminal plug, it includes terminal seat, front inner shell, front shell, tail shell, front lock cap, rear lock cap, tail rubber sleeve, upper half lock hoop, lower half lock hoop and locking screw, terminal seat is located in front inner shell, front shell is sleeved on front inner shell to form annular slot, for inserting corresponding component.Tail shell front end is connected with front inner shell through front lock cap, tail rubber sleeve front end is connected with tail shell tail end through rear lock cap, the connecting lug of rear lock cap both sides is connected with upper half lock hoop, lower half lock hoop by locking screw, to hold fixedly tail rubber sleeve, so that tail rubber sleeve contraction is closely connected with cable, avoid cable tension direct action in the connecting place of cable and terminal, effectively solve the problem that traditional terminal plug is without fixed structure due to shell and cable, lead to cable back and forth to pull and make connecting place loose or disengagement, greatly improve the working stability and reliability of terminal plug, reduce the risk of electrical signal or power interruption, and long service life.

The embodiment of the utility model discloses a high-precision force control ZR-axis module which comprises a Z-axis motor, an R-axis motor, a sliding plate, an air inlet connector, an air pipe, a pressure sensor, a fixed bent pipe, a motor connecting base, a vertical switching pipe, a switching connector and a transverse switching pipe, the R-axis motor is installed on the motor connecting base, and the motor connecting base is connected with the sliding plate through the pressure sensor. The other end of the air pipe is communicated with the upper end of the fixed bent pipe, the lower end of the fixed bent pipe is connected with one end of the switching transverse pipe, the other end of the switching transverse pipe is connected with the adapter, the tail end of a main shaft of the R-axis motor is connected with the switching vertical pipe, an air channel is formed in the motor connecting base, and the switching vertical pipe is communicated with the adapter through the air channel. According to the utility model, the influence of external force on the pressure detected by the pressure sensor is reduced, the movable air pipe is prevented from directly acting on the rotating motor or indirectly acting on the pressure sensor, the error is reduced, and the precision of a pressure closed loop is improved.

This utility model relates to an anti-loosening device for a high-voltage bushing end screen, comprising an outer casing, a bushing end screen unit, a conductive rod, an anti-loosening unit, and a top cover. The bushing end screen unit, conductive rod, and anti-loosening unit are all installed within the outer casing. The bushing end screen unit is connected to the anti-loosening unit via the conductive rod. The top cover is installed on the outer casing, and the anti-loosening unit is installed on a fixed cover. This utility model forms an elastic pre-tightening system between the outer casing end screen unit, the conductive rod, and the anti-loosening unit. The conductive rod transmits the vibration of the bushing end screen unit, and the anti-loosening unit dynamically adapts to changes in the displacement of the conductive rod, ensuring good contact between the three components.

This utility model discloses a multi-layer wear-resistant coating structure that adapts to scouring environments, belonging to the field of wear-resistant coating technology. The key technical points include a substrate with a wear-resistant protective layer on its surface. This protective layer consists of a first transition layer, an intermediate buffer layer, a second transition layer, and an outer rigid protective layer, arranged sequentially from the inside out. The substrate and the first transition layer are coated and bonded after sandblasting pretreatment. The first transition layer and the intermediate buffer layer are bonded by hot-pressing curing. This solves the problems of existing multi-layer wear-resistant structures, which often use direct coating or simply grind carbon steel substrates without targeted pretreatment, leading to easy peeling and detachment under long-term scouring. Furthermore, the interlayer bonding often uses a single curing process, failing to match the characteristics of different coating materials, resulting in gaps and cracks between layers, easy crack propagation along the interlayer boundaries, poor elasticity of the transition layer material, lack of self-healing design in the outermost layer, and no reasonable surface texture, resulting in weak wear resistance and damage resistance.

The utility model discloses a wide -width steel box girder transverse splicing component with reinforcing structure, including steel box girder unit, the steel box girder unit front end upper and lower both sides are all seted up with first slot, the steel box girder unit rear end is provided with the first plug piece corresponding with first slot, the steel box girder unit front end is provided with reinforcing cladding hoop, the reinforcing cladding hoop includes reinforcing left half hoop and reinforcing right half hoop. In this scheme, the reinforcing left half hoop and reinforcing right half hoop of steel box girder unit front end setting are just surrounded with the first slot and the insertion of the insertion strip and insert the reinforcing cladding hoop, and the steel box girder unit splicing place of two adjacent sections is clamped, and the integrated reinforcing frame is formed, and the frame is rigidly connected with the steel box girder unit through the first bolt and nut assembly, and the connection of reinforcing cladding hoop and steel box girder unit side wall is further reinforced by second bolt and nut assembly, and double fixed system is formed, and the local stress of splicing place is dispersed to whole reinforcing frame, and the overall stability and durability of steel box girder are improved significantly.

The present application relates to the technical field of automobile accessory production, and specifically discloses a product production online monitoring system using in-mold monitoring vision, which comprises a box, first and second sliding grooves are formed in the outer walls of the two sides of the box, a first mounting plate and a second mounting plate are respectively slidably installed in the two first and second sliding grooves, a monitoring display and a keyboard are respectively installed on the top of the first and second mounting plates, a base is installed on the inner bottom surface of the box, a main machine is installed in the box through a mounting mechanism, and a protection mechanism is arranged on the front face of the box. In the present application, the first and second protection plates are arranged to protect the monitoring display and other equipment in the box when they are not in use, so that the monitoring display and other equipment are prevented from being damaged by other equipment in the processing workshop and the normal use of the monitoring display and other equipment is not affected. In addition, the protection plates can ensure the safety of workers when the monitoring display is used.

The application provides a continuous miner storage and transportation vehicle and a continuous mining system. The continuous miner storage and transportation vehicle comprises a support member, a scraper conveyor and a turnover member. The support member has a bearing part and a walking part for driving the bearing part to follow the walking of the miner. The scraper conveyor is arranged on the bearing part and is used for transferring the ore temporarily stored in the bearing part, i.e. the mined ore falls into the bearing part and is then transferred by the scraper conveyor. The whole process realizes continuous transportation of the ore and improves the mining efficiency of the continuous miner. The turnover member is arranged on the path of the ore falling from the bearing part to the scraper conveyor. The turnover member has a plurality of turnover parts arranged at intervals and a driving part for driving the turnover parts to turn. The driving part drives the turnover parts to rotate and changes the gap between adjacent turnover parts, so as to control the amount of ore falling from the bearing space to the scraper conveyor and prevent the ore gravity from directly pressing on the scraper conveyor, thereby preventing the technical problem that the scraper conveyor cannot be started.

The utility model relates to the technical field of winding pipes, in particular to a buried double-high-rib reinforced polyethylene (HDPE) winding pipe. The high rib comprises a first high rib body and a second high rib body, a connecting piece is arranged between the first high rib body and the second high rib body, the two sides of the connecting piece are fixedly connected with the first high rib body and the second high rib body respectively, and the first high rib body and the second high rib body are hollow. The first high rib is composed of a first inner side, a second outer side, a first top side and a first bottom side, and the second high rib is composed of a second inner side, a second outer side, a second top side and a second bottom side. According to the double-high-rib reinforced polyethylene HDPE winding pipe, unnecessary structures are reduced, the overall weight of the double-high-rib reinforced polyethylene HDPE winding pipe is reduced, the overall double-high-rib reinforced polyethylene HDPE winding pipe can be firmer through the connecting pieces, the first inner side and the second inner side are both arranged in an inclined mode, bottom stress can be reduced, and the service life of the double-high-rib reinforced polyethylene HDPE winding pipe is prolonged. Therefore, the firmness of the double-high-rib reinforced HDPE winding pipe is enhanced.

The utility model discloses a fixing structure for an oil suction filter, which belongs to the technical field of hydraulic pressure and comprises a connecting plate, the connecting plate is detachably connected to the outer wall of an oil tank, a quick-release connector is arranged on the upper portion of the connecting plate, the oil suction filter is connected to the upper portion of the quick-release connector, and a limiting supporting mechanism is arranged on the outer side of the oil tank. The limiting and supporting mechanism is used for limiting and supporting the oil suction filter, and the phenomenon that the filter is directly screwed on an oil tank, and under the working condition of frequent vibration or large load fluctuation, looseness and even oil leakage are easily caused by fretting wear of a thread pair or loss of pre-tightening force can be avoided.

The utility model relates to photovoltaic module technical field provides a photovoltaic support and roof adapter structure, including the embedded bar, the embedded bar one end sets the lug, and the lug is embedded into the concrete block with the embedded bar, and the embedded bar other end installs the welding hole of end plate, and the welding hole axial setting conical welding, and the embedded bar side wall sets up conical welding block with the connecting plate top surface, and the end plate end installs the connecting plate perpendicularly, and a plurality of long holes are set up on the connecting plate, and the photovoltaic plate framework is installed in the long hole through the bolt, increases photovoltaic system stability.

The present invention discloses a customized personalized abutment and screw, a manufacturing device and a manufacturing method, wherein the customized personalized abutment and screw include a personalized abutment, a screw, a crown and a fixing assembly, wherein the personalized abutment includes an upper abutment, a middle abutment is integrally formed at the lower end of the upper abutment, a lower abutment is integrally formed at the lower end of the middle abutment, a coating is provided on the lower end side wall of the upper abutment and the side wall of the middle abutment, and assembly holes are provided in the upper abutment, the middle abutment and the lower abutment in a through manner. The present invention sets a fixing assembly to fix the abutment and the crown, and the crown is installed on the abutment without lateral displacement and rotation through the cooperation of the upper limit projection of the crown and the upper limit groove of the abutment, and after the crown is installed in place, the clamping rod on the abutment and the clamping groove on the crown cooperate to limit the up and down movement between the crown and the abutment, so that the position of the crown after installation is consistent with the set position while ensuring stability during use.

The utility model provides a variable load type phase advancer with a buffer structure, which comprises a phase advancer, the side surface of the phase advancer is rotatably connected with a movable door, the side surface of the phase advancer is provided with a protection assembly, the protection assembly comprises a connecting pipe, one end of the connecting pipe penetrates through the side surface of the phase advancer, and a wire penetrates through the side surface of the connecting pipe. The side face of the phase advancer is rotationally connected with a rotating rod, the circumferential face of the rotating rod is fixedly connected with a protective cover, the end, away from the phase advancer, of the rotating rod is fixedly connected with a gear, the side face of the phase advancer is fixedly connected with a transverse plate, the bottom of the transverse plate is slidably connected with a rack, and the side face of the phase advancer is fixedly connected with a rectangular rod. An electric telescopic rod is fixedly connected to the side face of the rectangular rod, one end of the electric telescopic rod is fixedly connected to the side face of a rack, the rack is meshed with a gear, a protective cover is located above the connecting pipe and the electric wire, a switch is arranged at the top of the electric telescopic rod, and the connecting pipe and the electric wire can be covered through the design of the protective cover.

The utility model relates to the technical field of four-way structures, and discloses a four-way structure for an oil injection and extraction pipe of a wellhead device of a gas storage, which comprises a four-way pipe body and two side pipes, one side of the outer wall of the four-way pipe body is provided with two symmetrically arranged mounting cavities, the inner walls of the two mounting cavities are connected with mounting blocks in a sliding manner, and the mounting blocks are connected with the four-way pipe body. Mounting plates are fixedly connected to the sides, away from the four-way pipe body, of the two mounting blocks, protective covers are fixedly connected to the sides, away from each other, of the two mounting plates, the two protective covers are arranged on the outer walls of the two side pipes in a sleeving mode correspondingly, and a spring cavity is formed between the two mounting cavities in a penetrating mode. According to the oil injection and extraction pipe four-way structure for the gas storage wellhead device, when a user uses the four-way pipe body to inject and extract natural gas and other raw materials, the outer walls of the four-way pipe body and the two side pipes can be sleeved with the two protective covers, and then outdoor rainwater or sunlight can be prevented from directly acting on the four-way pipe body and the two side pipes; therefore, the probability of equipment damage is reduced.

The utility model provides a three-way ball valve, which relates to the technical field of ball valves, and comprises a three-way valve body, three ends of the three-way valve body are respectively welded with an internal thread bushing, the inner wall of the three-way valve body is rotatably provided with a valve rod, one end of the valve rod is fixedly provided with a hand wheel, and the outer surface of the hand wheel is provided with a limiting device. According to the hand wheel fixing device, the disc abuts against the bottom of the hand wheel, the hand wheel can be fixed through friction force between the disc and the hand wheel, meanwhile, the outer surface of the hand wheel can be shielded through the disc, and the hand wheel can be fixed through the limiting device; and even if the hand wheel is subjected to the external force, the hand wheel is fixed through the disc, the situation that the hand wheel is prone to rotating, and consequently the on-off and flowing conditions of fluid in the three-way ball valve are changed can be prevented, and normal use of the three-way ball valve is more convenient.

The utility model provides a kind of battery box with anti-collision beam, it is related to power battery storage technical field, including power battery box, the bottom of the power battery box is fixedly installed with anti-collision component, the anti-collision component includes anti-collision bottom plate, the top of the anti-collision bottom plate is fixedly connected with three buffer supports, the top of the buffer support left and right sides is rotatably hinged with connecting frame.The utility model has realized the effective buffering of bottom impact, its principle is when anti-collision bottom plate is extruded, it will push trapezoidal top plate to slide upwards, the sliding of limit sliding block in limit sliding groove limits the sliding range of trapezoidal top plate, trapezoidal top plate is slidably matched with inclined sliding groove, pushes two trapezoidal sliding blocks to slide along guide slide bar to left and right sides, and extrudes buffer spring, so as to disperse the impact force upwards to both sides, avoids that impact force is directly applied to power battery box, effectively protects the safety of power battery box and internal battery pack.

The utility model discloses a protection device of moxibustion therapy equipment, which comprises an upper shell and a protection plate arranged below the upper shell, the upper end of the protection plate is provided with a protection net convenient for moxibustion heat diffusion, the edge of the protection plate is provided with a travel switch used for touch detection, and the upper end of the travel switch is arranged at the lower end of the upper shell; the upper shell is used for placing combustible consumables, a lower opening for moxibustion therapy is formed in the lower end of the upper shell, and the lower opening of the upper shell corresponds to the protective net in position; moxibustion holes are formed in the protection plate. Under the ejection of a foreign object, the travel switch is installed on the protection plate so that the protection plate can move upwards locally or wholly, then the height from the highest point of the upper shell to the human body is determined, then the protection plate is prevented from making contact with the human body again by controlling the downward moving distance of the upper shell, and therefore the protection performance of the upper shell is improved.

The high-strength tundish cover comprises a main body, a plurality of fire-resistant sleeves and a plurality of connecting parts, a plurality of working holes are formed in the main body, a first side face and a second side face of the main body are arc-shaped, and the protruding direction of the first side face is consistent with the sinking direction of the second side face; each fireproof sleeve comprises a sleeve, an upper shielding part and a lower shielding part, each sleeve is arranged in the corresponding working hole, each upper shielding part is arranged at the top end of the corresponding sleeve and makes contact with the first side face, and each lower shielding part is arranged at the bottom end of the corresponding sleeve and makes contact with the second side face; the plurality of connecting parts are respectively connected with the main body, and the normal on the joint of the main body and each connecting part is parallel to the connecting part; wherein the connecting parts are attached to the tundish, and the second side faces face the tundish. The high-strength tundish cover has high strength, deformation and warping of the tundish cover can be reduced in the working process, and the service life of the tundish cover is prolonged.

The utility model belongs to the technical field of doors and windows, and discloses a novel intelligent fireproof aluminum alloy door and window which comprises a window frame, the window frame is connected with a window sash and a mounting frame, the mounting frame is provided with a mounting groove, the inner side of the mounting groove is rotationally connected with a storage roller, the storage roller is connected with fireproof cloth, and the inner side of the mounting groove is connected with a servo motor. An output shaft of the servo motor is connected with a threaded rod, the threaded rod is in threaded connection with a moving plate, the moving plate is slidably connected with the mounting groove, the fireproof cloth is connected with the moving plate, the inner side of the mounting groove is connected with a smoke sensor and a controller, and the mounting frame is connected with a sealing plate. According to the technical scheme, the fireproof cloth can be pulled out by moving the movable plate, a water source is sprayed out through the water spraying pipe, flames are prevented from directly acting on glass, the fireproof performance of the aluminum alloy door and window is improved, the situation that the glass is broken and falls to hurt others is avoided, and practicability is greatly improved.

This utility model discloses a plastic-coated steel pipe bend joint suitable for low-temperature conditions, comprising a bend section and straight pipe sections welded to both ends, forming a bend structure. It also includes: a stress buffer device comprising a corrugated compensator welded to the junction of the bend section and the straight pipe section, and a flow-damping orifice plate connected to the other end face of the corrugated compensator; and a damping sliding pair comprising a damping sliding tube fixed to the outer wall of the flow-damping orifice plate and a fixed damping kit fitted into the inner wall of the straight pipe section. The end face of the corrugated compensator connected to the flow-damping orifice plate is a free end that slides axially along the straight pipe section, and the damping sliding tube and the fixed damping kit achieve a sliding seal through an elastic seal. This utility model uses the sealing gas, the elastic material in the corrugated compensator, and the friction generated by the relative sliding of the damping sliding tube and the fixed damping kit to jointly counteract the pressure caused by frost heave, making the joint fully adaptable to low-temperature conditions.

The utility model discloses a balloon catheter and a shock wave device, and relates to the technical field of medical instruments. The balloon catheter comprises a catheter body, a balloon assembly, an electrode and a parameter sensor. The near end of the catheter body is suitable for injecting liquid; the balloon assembly at least comprises a first balloon and a second balloon, and the first balloon and the second balloon are both arranged at the far end of the catheter body; the first balloon and the second balloon are each provided with a plurality of electrodes, and the electrodes are suitable for being electrically connected with a control system of the shock wave device. The parameter sensor is arranged in the catheter body and used for detecting the instantaneous maximum pressure difference value generated during discharging in the first balloon and the second balloon, and the parameter sensor is suitable for being electrically connected with a control system. According to the balloon catheter, the structure of the balloon catheter is improved, serious complications such as vascular perforation and even myocardial necrosis can be effectively avoided, and the safety of operation is greatly improved.