59results about How to "Good compression effect" patented technology

The present invention relates to an assembly structure of an open water pump and a cleaning machine, wherein a cover plate is arranged transversely in the middle of a volute and its edge is arranged close to the inner wall of the volute, and the inner cavity of the volute is divided into an upper cavity and a lower cavity, the bottom edge of the guide vane is supported on the inner bottom wall of the volute, and the semi-enclosed structure formed by the guide vane is arranged close to the inner wall of the volute opposite to the second water outlet and is detachably connected to the inner wall of the volute, and the second water outlet is close to the inner wall of the volute and is connected to the upper cavity. The semi-enclosed structure formed by the guide vane is offset relative to the center of the cover plate, and the offset structure cooperates with the spiral structure of the guide vane to pressurize the water flow together, reduce energy loss, and make the water flow pressure meet the pumping demand on the basis of simplifying the water pump structure; during assembly, the circumferential constraint position of the cover plate in the volute can be used to control the size of the connection area between the first water outlet and the second water outlet, thereby adjusting the size of each water flow after diversion to meet the user's unique cleaning needs.

The utility model discloses a deep groove ball bearing machining inner ring butt joint installation auxiliary device which comprises a bottom plate, the top of the bottom plate is connected with an installation plate in a sliding mode, one side of the installation plate is provided with an opening mechanism, the opening mechanism comprises a cylinder, a bearing inner ring, a motor, a rotating shaft, a movable plate, a fixed shaft and a rotating plate, and the cylinder is fixedly installed on one side of the installation plate. A motor is fixedly installed on one side of the inner wall of the cylinder, a rotating shaft is fixedly installed on an output shaft of the motor, and two movable plates are fixedly installed on the outer ring of the rotating shaft. The motor is started to drive the rotating shaft to rotate so as to drive the movable plate to do circular motion, the rotating plate can be extruded to rotate around the fixed shaft, the bearing inner ring is expanded when the rotating plate moves, then the electric push rod is started to drive the mounting plate to move through the push plate, and then the bearing outer ring and the bearing inner ring are driven to be mounted through the cylinder. The bearing outer ring is prevented from being abraded during installation, and a better installation effect is achieved.

The utility model provides a sieve plate hold-down device which comprises a fixed wedge block, a sliding wedge block and a locking mechanism, the sliding wedge block is arranged in a sliding mode relative to the fixed wedge block, the fixed wedge block is provided with a first wedge face, the sliding wedge block is provided with a second wedge face and a hold-down face, the hold-down face is located on the back face of the second wedge face, and the second wedge face abuts against the first wedge face. The sliding wedge block is driven by the locking mechanism to slide relative to the fixed wedge block, so that the sliding wedge block moves along the height and is positioned; the locking mechanism comprises a locking bolt and an anti-loosening assembly, a long-strip-shaped hole formed in the height direction is formed in the sliding wedge block, the locking bolt penetrates through the long-strip-shaped hole and is connected with the anti-loosening assembly, and the sliding wedge block is pulled to slide through the locking bolt. The sliding wedge blocks are used for pressing the filtering sieve plate, the locking screw rods are parallel to the pressing plane, the vibration direction is perpendicular to the direction of the locking screw rods in the vibration process, and therefore the sliding wedge blocks and the locking screw rods are not prone to loosening in the vibration process.

The present invention discloses a filling device for controlling surface subsidence in a coal mine, which can effectively ensure the filling effect and prevent collapse. At the same time, slurries with different viscosities or concentrations are set, which can effectively realize the filling of slurries in gaps. Moreover, slurries with high viscosity or concentration are supplemented with pressurization by a rotating drive mechanism, which can effectively realize the pressurization of slurries with low viscosity, improve the pressurization capacity and filling effect, and realize effective filling of gaps.

The utility model provides a presser foot structure of a multi-needle machine, and belongs to the technical field of sewing machines. The problem of how to improve the sewing quality of the multi-needle machine is solved. The presser foot structure of the multi-needle machine comprises a connecting base, a presser foot plate with a plurality of needle holes and a presser foot support fixedly connected with the connecting base, the presser foot plate is located below the presser foot support, the two side edges of the presser foot plate are hinged to the presser foot support, and a torsional spring is arranged between the presser foot plate and the presser foot support. The bottom face of the presser foot plate inclines relative to the horizontal plane in the front-back direction and is high in front and low in back, and the presser foot plate can swing relative to the presser foot support and reset through elastic force of the torsion spring. The presser foot is simple, reasonable and stable in structure, the presser foot plate has mechanical elasticity, stable and reliable pressing force can be provided for cloth with different thicknesses, the cloth is not prone to loosening, the pressing effect is good, and the sewing quality of the multi-needle machine is greatly improved.

The wood cutting table for building construction comprises a supporting plate and supporting columns, and the periphery of the surface of the bottom of the supporting plate is fixedly connected with the supporting columns. A connecting plate is fixedly connected to the surface of the top of the supporting plate, a linear guide rail is fixedly mounted on one side of the interior of the connecting plate, and a sliding sleeve is slidably connected to the surface of the linear guide rail. By arranging a double-end lead screw, a threaded sleeve, a clamping plate, a sliding block, a limiting rod, a second spring, an attaching plate, a limiting groove and a sliding groove, round wood can be clamped, wood of different shapes can be clamped and stably cut, the wood cutting efficiency can be improved, and the practicability is high. And meanwhile, by arranging a sliding rod, a barrier plate, a first spring and a push plate, after a part of the wood is cut, the wood can be pushed to advance, and therefore the wood can be better cut.

The utility model provides a pressing assembly for cylinder head machining. The pressing assembly comprises a bottom plate and a pressing plate, the lifting air cylinder is fixedly connected to the bottom plate; one end of the overturning block is hinged to an air cylinder rod of the lifting air cylinder, a transverse plate is fixed to the other end of the overturning block, the overturning block is further provided with a liquid inlet hole and a liquid outlet hole, the liquid inlet hole and the liquid outlet hole are communicated through a channel, and the liquid outlet hole is located in the middle area of the front face of the overturning block; the hinge seat is also fixedly connected to the bottom plate and located in front of the lifting air cylinder, a connecting rod is hinged to the hinge seat, and the top of the connecting rod is hinged to the overturning block; and the two pressing structures comprise pressing heads, the two pressing heads are connected to the two ends of the transverse plate in a floating mode, and the lower surfaces of the pressing heads are curved surfaces. According to the pressing assembly, two points of the upper end face of the cylinder head can be pressed, the pressing effect is good, high adaptability to workpieces with uneven upper end faces is achieved, stable pressing of the cylinder head is achieved, and the machining quality and stability of the cylinder head are effectively improved.

The application relates to the field of heating pipe processing, and provides a tube needle stamping equipment for a heating pipe, which is applied to the installation of a tube needle and a terminal pin of the heating pipe, the tube needle penetrating through the terminal pin; the stamping equipment comprises a rack, a placing piece, a stamping piece and an abutting piece; the placing piece is installed on the rack, and a placing groove for placing the heating pipe and the needle tube is arranged on the placing piece; the abutting piece is installed on the rack, the tube needle extends to the abutting piece through the placing groove, and the terminal pin is clamped with the abutting piece; the stamping piece is installed on the rack and located above the abutting piece; the stamping piece drives a stamping end to stamp the terminal pin, and the terminal pin is pressed by the stamping end and the abutting piece on the tube needle. The application has the effect of preventing the terminal pin from separating from the tube needle.

The invention discloses a rotary lighting multi-layer three-dimensional planting device which comprises a movable base, the top of the movable base is rotatably connected with a rotating disc, the rotary lighting multi-layer three-dimensional planting device further comprises a planting frame, the planting frame is fixedly connected to the top of the rotating disc, and the top of the planting frame is fixedly connected with a protection assembly. The inner surface of the planting frame is in sliding connection with a planting assembly; and the filtering assembly is slidably connected to the inner surface of the planting frame, the bottom of the filtering assembly is slidably connected with a water pump, and the bottom end of the water pump is fixedly connected with a spraying pipe frame. According to the multi-layer three-dimensional planting equipment capable of rotatably lighting, a rotating disc is driven by a motor to rotate on a movable base, so that the lighting position of a planting frame is adjusted through rotation of the rotating disc, the sunlight receiving effect of a planting assembly is further improved, and a spraying pipe frame corresponds to the planting assembly in the planting frame; and the spraying pipe frame can conveniently irrigate the planting assembly.

The utility model relates to a fixing device of a track trolley timing fixing frame, which belongs to the technical field of educational equipment and comprises a fixing frame body, a track body is mounted at one end of the fixing frame body, a fixing plate extending upwards is fixed at the other end of the fixing frame body, and a timer is further mounted in the fixing frame body. An arc-shaped spring piece is arranged on the side, close to the fixing plate, of the timer in an attached mode, a butterfly bolt penetrates through the outer side of the fixing plate in a threaded mode, and the end of the butterfly bolt abuts against the arc-shaped spring piece. The fixing device is good in fixing effect and easy and convenient to operate.

The invention discloses a liquid hydrogen conveying device which comprises a conveying pipe, a pressurizing part, a refrigerating part, a power part and a transmission part. The conveying pipe is composed of a conveying inner pipe and a thermal insulation outer pipe, and a vacuum thermal insulation cavity is formed between the inner pipe and the outer pipe. The refrigerating part comprises a liquid hydrogen equalizing assembly, an inner and outer connecting sleeve, a cold source sleeve, a heat source sleeve and a piston assembly which are concentrically arranged, and liquid hydrogen is pressurized and refrigerated through an inner and outer annular piston, a communicating pipe, a crankshaft and a connecting rod mechanism. The power part drives the pressurizing part and the refrigerating part through the transmission part, and stable conveying of the liquid hydrogen is guaranteed. The liquid hydrogen conveying method comprises the following steps that low-temperature conveying of liquid hydrogen is kept through the conveying pipe and the vacuum heat insulation cavity; the liquid hydrogen is pressurized and cooled through the pressurizing part and the refrigerating part; the power part drives the pressurizing part and the refrigerating part to operate through the transmission part. The liquid hydrogen conveying efficiency and stability are remarkably improved, it is ensured that liquid hydrogen is efficiently pressurized, refrigerated and stably conveyed in the liquid phase state, and good technical advantages and application prospects are achieved.

The utility model discloses a PCB punching device which structurally comprises a workbench and pressing plates, PCBs are placed on a placing plate, a first motor drives a first lead screw to enable the pressing plates on the two sides to move inwards under the action of pushing force, the pressing plates enable the PCBs to be close to each other, attached to each other and clamped, and therefore the PCBs can be punched. And meanwhile, a second electric push rod at the upper end downwards pushes a lower pressing plate to downwards press the PCB again, so that the stability of the PCB during punching is better, the deviation condition is reduced, the condition that the PCB is damaged during pressing due to excessive stress can be prevented under the action of a first pressure sensor and a second pressure sensor, the safety is higher, and the production efficiency is improved. And a drill bit at the bottom end can move left and right under the condition that a second motor drives a second screw rod, and a stress sliding block can drive the drill bit to move front and back under the condition that a third motor drives a third screw rod, so that the punching work of different positions of the PCB can be realized, the working efficiency is higher, the time for manually adjusting the direction is saved, and the working progress is accelerated.

The table type water purifying and drinking machine comprises a machine body and a raw water tank, the machine body is provided with a water tank base used for bearing the raw water tank and a water path switching assembly used for being in butt joint communication with a water outlet of the raw water tank, the machine body comprises a vertical back plate, and the water tank base has a first installation stroke and a second installation stroke; an included angle is formed between the first mounting stroke and the second mounting stroke; and the water tank seat is mounted on the vertical back plate through the first mounting stroke and the second mounting stroke in sequence, and meanwhile, the waterway switching assembly is downwards pressed on the vertical back plate. According to the table type water purifying and drinking machine, the water tank base can be used for bearing the raw water tank and can also press and fix the water path switching assembly, the effect that one water tank base has multiple functions is achieved, the integration of component functions is improved, structure simplification is facilitated, the accessory cost is saved, the installation firmness of the water path switching assembly on the machine body is guaranteed, and the service life of the water tank base is prolonged. Therefore, the sealing performance of the raw water tank and the waterway switching assembly in the butt-joint communication state is improved, and the water leakage risk is greatly reduced.

The utility model relates to the technical field of range hoods, and discloses a range hood cover for a kitchen, which comprises a hood body provided with an opening. The air deflector is fixedly installed at an opening of the hood body and used for guiding air, a storage structure used for collecting oil dripping from the air deflector is arranged on the inner wall of the hood body and comprises a material storage box and a limiting frame, the material storage box is detachably connected with the hood body, the limiting frame forms a cavity, and the material storage box is sleeved with the limiting frame. When lampblack on the back face of the air guide plate is collected and drips along the air guide plate, the storage box can collect the lampblack, the limiting frame can press and limit a thin film laid in a cavity of the storage box and used for separating the lampblack from the storage box, and the situation that in the air exhaust process of a draught fan in the hood body, the thin film is sucked, and consequently the draught fan is clamped and damaged is prevented; the film fixing device has a better fixing effect on the film, meanwhile, the film is convenient to replace, and daily use is convenient.

The utility model discloses a motor clamping test tool in the technical field of motor test tools, and the tool comprises a platform, the platform is provided with a test bench, the platform is also provided with a slide rail, the slide rail is slidably connected with a tool plate sliding towards the test bench, the platform is fixedly provided with a first cylinder, a second cylinder and a third cylinder, and the first cylinder, the second cylinder and the third cylinder are fixed on the platform. The first air cylinder drives a push plate pushing the tool plate to move towards the test board, the movable end of the second air cylinder drives a pressing plate pressing the motor in the radial direction, and the movable end of the third air cylinder drives a limiting block limiting sliding of the tool plate. According to the invention, the motor can be rapidly fixed, and the reliability and efficiency of the test tool are higher.

The utility model provides a stone-plastic grating plate film-covering pressing structure which is applied to a stone-plastic grating plate film-covering production line. The conveying device is arranged on the upper portion of the rack and used for conveying a grating plate, the pressing devices are arranged on the two sides of the conveying device and used for pressing and bonding the grating plate and a pattern film, the limiting device is used for limiting the advancing direction of the grating plate, and the pressing devices are arranged in a staggered mode. The laminating and pressing structure for the stone-plastic grating plate is good in pressing effect, wide in application range and capable of guaranteeing the excellent attaching degree of a pattern film and the grating plate in the advancing process of the grating plate.

The application relates to the technical field of adhesive tape production, and discloses a conveying device applied to adhesive tape processing and production, which comprises a rewinding conveyor body and winding rollers. A gear disc is rotatably arranged on one side of the rewinding conveyor body. The winding rollers are arranged in multiple numbers and rotatably arranged on one side of the gear disc at equal intervals. The winding rollers are rotatably arranged on one side of the gear disc at equal intervals. When the winding work of the inner cylinder of the adhesive tape on one of the winding rollers is completed, the winding roller is automatically switched by controlling the rotation of the gear disc by a predetermined angle. In the process of switching the winding roller each time, the unwound adhesive tape naturally contacts the surface of the inner cylinder of the adhesive tape on the new station, automatic adhesion is realized by using the adhesion of the adhesive tape itself, the multiple winding rollers can cyclically and alternately enter the winding station through the multi-station gear disc switching mechanism, the contact and adhesion of the end of the adhesive tape and the new inner cylinder of the adhesive tape are synchronously completed in the switching process, and the timing linkage of'switching and adhesion and cutting and separation' is realized.

The utility model discloses an airtight clamp tool for a battery pack tray. The airtight clamp tool comprises an airtight clamp base, a clamp supporting mechanism, a sealing plate, isopyknic filler and a pressing mechanism, wherein the sealing plate is horizontally arranged on the airtight clamp base through the clamp supporting mechanism, the multiple isometric fillers are horizontally laid on the sealing plate, the battery pack tray to be tested is buckled on one isometric filler, and the pressing mechanisms are arranged on the airtight clamp base and arranged on the periphery of the sealing plate. Each pressing mechanism corresponds to one isovolumetric filler and presses the to-be-tested battery pack tray on the isovolumetric filler, the pressing heads of the clamp tool are evenly distributed, the pressing effect is good, and the to-be-tested battery pack tray can be accurately positioned.

The invention relates to the technical field of plate edge banding, in particular to a pressing device and an edge banding machine, the pressing device comprises a pressing beam and a pressing wheel seat located below the pressing beam, the pressing beam comprises two vertical plates parallel to each other and a transverse plate located between the two vertical plates, and a plurality of swing shafts are arranged in the length direction of the vertical plates; the two ends of each swing shaft are connected to the corresponding vertical plates, and the multiple swing shafts are arranged in a straight line and located below the transverse plate. A plurality of pressing wheel seats are correspondingly arranged on the swing shafts, each pressing wheel seat is provided with a pressing wheel, and a needle bearing is arranged between each pressing wheel and the corresponding pressing wheel seat. The bearing capacity of the needle bearing is higher, the operation stability and the service life can be guaranteed when the needle bearing faces large counter-acting force and eccentric force of the needle bearing, the better plate pressing effect is achieved, and therefore the edge sealing quality is guaranteed.

The invention relates to the technical field of air sterilization and purification, and discloses an aerosol-infected virus decomposition device which comprises a base, an outer frame is fixedly connected to the top of the base, a top cover is fixedly connected to the inner wall of the end, away from the base, of the outer frame, and an air suction pump is fixedly connected to the end face of the side, close to the top cover, of the base. An air inlet pipe is fixedly connected to the inner wall of the end face of the side, close to the air suction pump, of the top cover, a motor is fixedly connected to the inner wall of the side, close to the outer frame, of the base, and a control panel is arranged on the inner wall of the side, close to the air suction pump, of the base. When the device is used and the device is placed in a space where aerosol heat transfer viruses need to be killed, the air suction pump in the water removal component is started, air needing to be killed starts to be absorbed in a guiding mode and enters the device, meanwhile, the motor is started to drive the output rod to operate, the output rod can drive the output belt to conduct transmission, and the device is driven by the motor to rotate. When the output belt is in transmission, the transmission rod on the inner wall of the other side is driven to start to rotate and operate.

The utility model discloses a polishing mechanism for auto spare part production, which relates to the technical field of auto spare parts, and comprises a mechanism shell, the outer wall of the mechanism shell is fixedly connected with a support platform, and the outer wall of the mechanism shell is provided with a fixed plate. According to the polishing mechanism for automobile part production, the mechanism shell, the supporting platform, the fixing plate, the hydraulic long push rod, the curing plate, the servo motor body, the polishing piece, the fan-shaped frame, the telescopic rod and the pressing block are used in cooperation, so that the polishing mechanism for automobile part production can conveniently press automobile parts during polishing, and the pressing effect is good; according to the automobile part polishing device, certain stability is kept in the polishing process, it is ensured that deviation is not prone to occurring, the stability performance of the structure is improved, an automobile part to be polished is placed on a supporting platform, a telescopic rod is started to drive a pressing block to press downwards, a user starts a servo motor body, and the servo motor body is driven to rotate; and the servo motor body drives the grinding piece to conduct grinding, and efficiency and rapidness are achieved.

The utility model discloses a multifunctional post-breast-operation elastic bandage which comprises a base body part and a bandage body part. A cup through hole is formed in the center of the cup part in a penetrating manner, and the peripheral side of the cup part is connected with the base body part through a bidirectional zipper; the strap parts are made of elastic materials, the width of the strap parts is smaller than that of the cup parts, the strap parts are connected to the two sides of the base body part through fixed ends, and the movable ends of the strap parts are detachably connected together; the number of the inflatable air bags is two, the inflatable air bags are annular, a hole in the middle of the annular shape is matched with the position and the size of the cup through hole, the outer size of the annular shape is matched with the size of the cup part, and the inflatable air bags are fixed on the inner side of the cup part through hook-and-loop fasteners. The position of the nipple is reserved, the phenomenon of nipple necrosis caused by blood supply disorder due to the fact that the bandage compresses the nipple areola can be avoided, the inflatable air bag is designed to pressurize the breast portion in a targeted mode, the compression hemostasis effect or the effusion discharge promoting effect is improved, and rapid postoperative rehabilitation is promoted.

The utility model provides a power transmission and transformation project cable fixing support which comprises an installation frame, a supporting plate arranged on the outer side of the installation frame, a pressing plate arranged above the supporting plate, an arc-shaped open groove arranged below the pressing plate, a push rod arranged on one side of the open groove, and a lower end of the push rod penetrating through the supporting plate. An upper cover box is installed on one side of the installation frame and located above the supporting plate, and a spring making contact with the pressing plate is arranged in the upper cover box. According to the utility model, the pressing plate moves downwards to press the cable by using the spring, thereby being suitable for cables with different diameters and ensuring the pressing effect; a groove matched with the pressing plate is formed in the upper cover box, and when the cable is fixed, the pressing plate stably ascends and descends in the groove along with stretching of the spring and is matched with the square push rod to ensure stable movement; when the cable is placed, the push rod is pushed upwards, the cable is placed and then loosened, the pressing plate is automatically pressed downwards and fixed through the spring, cable replacement operation is easy, complex adjustment is not needed, manpower and time cost are greatly saved, and workers can conveniently and rapidly complete power transmission and transformation project cable fixing work.

The utility model relates to a nasal cavity breather pipe after a nasal septum operation, which comprises two breather conduits, each breather conduit is provided with an air bag, one side of each breather conduit contacted with the nasal septum is a plane, the air bags are arranged on the other side of each breather conduit, and the lower ends of the air bags are respectively provided with an air valve used for inflating and deflating the air bags. The rear ends of the two ventilation catheters are connected through a connecting part; the connecting part is U-shaped and is positioned at the lower end of the ventilation catheter; and the front ends of the two ventilation catheters are arc-shaped. The nasal cavity breather pipe after the nasal septum operation can ensure that each position on the two sides of the nasal septum can be pressed in place, and the treatment effect is good.

The utility model discloses a reinforced electric bicycle frame, which belongs to the technical field of electric bicycles and comprises a front tube, a front beam component is arranged at one end of the front tube, a folder is arranged at one end of the front beam component, a rear beam component is arranged at one end of the folder, a middle tube is arranged at one end of the rear beam component, and a tail fork is arranged at one end of the middle tube. A battery installation seat is arranged in the tail fork, a pressing assembly is arranged above the battery installation seat, a saddle is arranged above the middle pipe, and a fixing assembly is arranged at the connecting position of the middle pipe and the saddle. According to the bicycle seat fixing device, the fixing seat, the pull rod, the fixing block, the fixing spring, the stabilizing sliding block and the stabilizing sliding rod are arranged, so that the bicycle seat is convenient to install, the height of the bicycle seat is convenient to adjust, and the use convenience is improved.

The utility model discloses a fixing auxiliary device for plastic woven bag production, belongs to the technical field of woven bag production, aims to solve the problems that the woven bag pressing and positioning effect is poor, and the fixing auxiliary device is difficult to be suitable for processing woven bags with different tastes, and comprises a rack and two rotating shafts, the two rotating shafts are symmetrically distributed and rotationally connected with the side wall of one side of the rack, the outer surfaces of the two rotating shafts are jointly sleeved with a conveying belt, a driving motor is fixed to the side wall of one side of the rack, chain wheels are fixed to an output shaft of the driving motor and one end of one rotating shaft, the outer surfaces of the two chain wheels are jointly engaged with a chain, and a positioning assembly is arranged on one side of the rack; through the arrangement of the positioning assembly, the woven bag pressing effect is good, the situation that the woven bag is loosened and even disengaged is effectively avoided, the woven bag pressing and positioning effect is greatly improved, the turnover auxiliary time between operation can be effectively shortened, the working efficiency of production and machining is greatly improved, and the adaptability is high.

The invention discloses a door bolt mechanism of a large sintering cavity, and aims to overcome the defect that a pressing block mechanism on the sintering cavity realizes opening and pressing of a door by rotating a plurality of hand wheels, which is relatively tedious. The device comprises a bolt connecting rod, a plurality of door pressing cushion blocks fixed to a cavity door and a plurality of bolt bodies rotatably installed on a sintering cavity, the bolt bodies are all rotatably connected with the bolt connecting rod, and after any bolt body rotates, all the bolt bodies are driven by the bolt connecting rod to rotate together, and the bolt bodies are pressed on the corresponding door pressing cushion blocks. According to the door bolt mechanism, opening and pressing operation of the large sintering cavity door is facilitated, synchronous rotation of all the door bolt bodies can be achieved by operating a single door bolt body, the working efficiency is improved, and the pressing effect of the cavity door is good.

The utility model discloses a cloth cover hold-down device for textile processing, which comprises a processing table and a hold-down cover, the top of the processing table is provided with the hold-down cover, one side of the top of the hold-down cover is provided with a turntable, a rotating shaft at the bottom of the turntable extends into the hold-down cover and is provided with a gear III, a screw rod is arranged in the hold-down cover below the gear III, and the screw rod is provided with a screw rod. A third gear is arranged in the middle of the screw rod, transmission blocks are arranged at the two ends of the screw rod, a fourth gear is arranged in the middle of the screw rod and meshed with the third gear, a sliding rod parallel to the screw rod is arranged in the portion, below the fourth gear, of the pressing cover, and sliding blocks are arranged at the positions, corresponding to the transmission blocks, of the two ends of the sliding rod; limiting pieces are arranged between the sliding blocks and the transmission blocks. Cloth entering the pressing cover is limited to prevent the cloth from shifting to affect subsequent processing, dust on the front face and the back face of the cloth can be removed, the cloth is kept clean, then the cloth is pressed in a temperature control mode, and the situation that the pressing effect is affected due to the fact that the temperature is too high or too low is avoided.

The present invention discloses a welding jig, which includes a load-bearing clamping assembly and a pressing assembly; the load-bearing clamping assembly and the pressing assembly are arranged opposite to each other; wherein the load-bearing clamping assembly carries a first component and a second component of a product to be welded; and the pressing assembly presses down the load-bearing clamping assembly, so that the load-bearing clamping assembly presses the boss of the first component. The welding jig of the present invention carries the product to be welded by the load-bearing clamping assembly, and acts on the load-bearing clamping assembly by the pressing assembly, so that the load-bearing clamping assembly presses the boss of the first component to be welded, thereby ensuring the reliability of the pressing, achieving a good pressing effect, and effectively avoiding the misalignment of the first component and the second component, so that the laser enters the interior of the product during laser welding, causing damage to the internal circuit, or other welding defects.

This application relates to a multi-pipe chimney, belonging to the field of chimney technology. It includes a flue, with at least two pairs of connecting rods fixedly installed on the inner wall of the flue. A base is fixedly installed inside the flue, and a central rod is installed on the top wall of the base, fixed to the connecting rods. A partition assembly is provided between the central rod and each pair of connecting rods. The partition assembly includes a driving part and a partitioning part, with the partitioning part located between the central rod and the driving part. The driving part drives the partitioning part to unfold, thereby dividing the flue into at least two independent channels. This application has the advantages of wide applicability of the chimney and reduced floor space.