32results about How to "Adjust the tightness" patented technology

The utility model relates to the technical field of sludge dewatering, in particular to a stacked screw sludge dewatering machine which comprises a shell and a fixed plate, a fixing plate is fixed to the inner wall of the shell through bolts, and the two ends of a mounting shaft are fixed to the fixing plate through bolts; the sleeve plate is connected to the outer wall of the mounting shaft in a sleeving manner, and a sliding hole is formed in the outer wall of the sleeve plate; the locking blocks are connected to the inner walls of the sleeve plates in an inserted mode in a clearance fit sliding mode, sliding blocks are welded to the outer walls of the locking blocks, and the sliding blocks are connected to the inner walls of the sliding holes in an inserted mode in a clearance fit sliding mode. Through improvement on the stacked screw sludge dewatering machine, the stacked screw sludge dewatering machine has the advantages of reasonable structural design, convenience in replacement of the fixed ring and the floating ring and capability of controlling sludge humidity, so that the problems and defects in the prior art and equipment are effectively solved.

This utility model relates to a compression hemostasis device for nursing care, comprising a reusable mounting frame and a disposable fixing strap. A limiting protrusion is fixed to the upper side of the mounting frame, and a winding cavity is provided in the middle of the mounting frame. An adjusting shaft is located within the winding cavity, and a self-locking turntable is fixed to the middle of the driving shaft. The self-locking turntable is located below the limiting protrusion, and a self-locking locking strip is slidably connected within the limiting protrusion. This utility model drives the rotating shaft to rotate by turning a knob, which in turn rotates the adjusting shaft to wind up the fixing strap until the compression block is applied to the patient, completing the compression hemostasis. It can be operated by a single person, reducing the workload of medical staff. The self-locking strip contacts the serrated part on the side of the self-locking turntable to lock the self-locking strip, ensuring that the self-locking strip firmly locks the adjusting shaft. By adjusting the rotating shaft to wind up the fixing strap, the tightness of the fixing strap is adjusted, thereby adjusting the pressure for compression hemostasis, ensuring the effectiveness of compression hemostasis while avoiding patient discomfort.

The utility model relates to the technical field of blood disease patient transplantation, and disclose a foot bath bag of paronychia, including waterproof bag, the inside of waterproof bag is equipped with soft glue frame, the top of waterproof bag is fixedly connected with additional belt, the outer wall of additional belt is sleeved with restraint band, the inside of restraint band is inserted with winding rope, the outer wall of winding rope is connected with adjusting block, the bottom of waterproof bag is connected with fixing frame. The foot bath bag of paronychy, through the cooperation setting of waterproof bag, soft glue frame and additional belt, can effectively contain iodine foot bath liquid, strictly prevent iodine liquid leakage, reduce the cleaning trouble and cross infection risk caused by liquid leakage, can accurately separate and position the patient's toes, whether it is big toe or little toe can be properly settled, ensure that iodine liquid can fully and evenly contact paronychia sick part, maximize the disinfection and treatment effect of iodine, promote the relief and recovery of paronychia symptom.

The utility model relates to the technical field of surge protectors, in particular to a surge protector convenient to install, which comprises a protector body, a chute is arranged on the back side of the protector body, four installation holes are uniformly arranged on the surface of the protector body, electric wires are detachably arranged on the inner walls of the installation holes, and the inner walls of the electric wires are connected with the chute. A mounting structure is arranged on the surface of the protector body, the mounting structure comprises eight rectangular blocks fixedly connected to the surface of the protector body, every two of the eight rectangular blocks form a group, and sliding plates are slidably connected to the interiors of the two rectangular blocks. According to the utility model, through the arrangement of the installation structure, the further installation and fixation work of the electric wire in the installation hole is facilitated, the installation stability of the electric wire inserted into the installation hole is improved, and the situation that the electric wire is easy to slip off from the inner side of the installation hole when the electric wire is subjected to external force after being installed in the installation hole is avoided; and the stability of installation and use between the surge protector and the electric wire is further improved.

The invention discloses a high-isolation rapid assembly and disassembly test device for a radio frequency module and a use method. The device comprises a main body frame, a radio frequency connector, a radio frequency connector pressing piece and a tested product, the main body frame comprises a frame, a guide rail and a guide rail fixing block, and the guide rail is connected with the frame through the guide rail fixing block; the radio frequency connector is arranged on the main body frame, and the radio frequency connector pressing piece is used for fixing the radio frequency connector; the radio frequency connector, the radio frequency connector pressing piece and the tested product are all arranged on the guide rail and move on the main body frame through the guide rail. The radio frequency connector, the radio frequency connector pressing piece and the tested product are installed on the guide rail, positioning is carried out through the radio frequency connector pressing piece, and in the disassembling process, the radio frequency connector pressing piece is loosened, so that a radio frequency module part on the guide rail can slide, and therefore the part is positively disassembled; and the radio frequency module component can be limited by clamping the radio frequency connector pressing piece, so that the component is moved and mounted.

The application discloses a kind of multi-functional operation vehicle of livestock production house in the technical field of livestock operation vehicle, including base, computer, identification stick and tail cutter;The application is in the process of pig farm breeding, when other operations are carried out after piglets are fixed, temporary storage basket and push plate are used, push plate is moved to make push plate and piglet side fit, so that the range of temporary storage basket is reduced, the activity range of piglet is reduced, the activity range of piglet is difficult to control, then by turning temporary storage basket, piglet is bound by binding belt, it is favorable to bind piglet when piglet is inspected, tail cutting or castration and other operations, limit the activity of piglet, reduce the possibility that piglet suddenly runs away or shakes when being inspected and other operations, ensure the normal operation, avoid piglet to suffer additional injury, and after temporary storage basket is turned by a certain angle, limit binding belt by moving plate and locking nail, so that binding belt cannot continue to unfold.

The utility model belongs to the technical field of hospital dress, and discloses a hospital dress for a hemodialysis patient, which comprises a dress body with sleeves, the sleeves are provided with windows corresponding to puncture parts of arms, and the edges of one sides of the windows on the sleeves are connected with closing pieces for closing the windows. The free ends of the closing pieces are detachably connected with the sleeves; a plurality of catheter holes are formed in the closing piece, and catheter limiting pieces are connected to the positions, corresponding to the catheter holes, of the closing piece; hemostatic cotton fixing pieces are arranged on the sides, away from the windows, in the sleeves; the utility model solves the problems that when a hemodialysis patient carries out puncture, arms catch cold due to the fact that sleeves are pulled up, the previous puncture part is injured, and a nurse cannot puncture conveniently.

The utility model discloses a PE (Poly Ethylene) membrane chilling roller deoiling device, which relates to the technical field of lithium battery wet diaphragm production, and comprises a chilling roller and a chilling water tank, the chilling water tank is provided with a water tank water inlet and a water tank outlet, the chilling roller is arranged in the chilling water tank, the upper end of the chilling water tank is fixedly provided with a press roller seat plate, and the press roller seat plate is provided with a press roller. Two groups of compression roller cylinders are fixedly mounted on the compression roller seat plate, a second water removal pressure roller is fixedly mounted at the output end of one group of compression roller cylinders, a first water removal pressure roller is fixedly mounted at the output end of the other group of compression roller cylinders, an oil suction air knife is mounted on the compression roller seat plate, and a connecting pipe is connected to the oil suction air knife. According to the film pasting device, the roller surface can be kept stable and clean for a long time, the film pasting effect is guaranteed, the produced film does not have the abnormity of large white spots, and the product quality is kept stable.

The invention discloses a cardiovascular nursing device with a limiting function, and relates to the technical field of cardiovascular nursing. The nursing device comprises an inflation layer and a nursing layer, an inflation opening is formed in the outer wall of the inflation layer, a plurality of connecting belts are arranged on one side of the inflation layer in a sliding fit mode, a plurality of fixing bases are arranged on the other side of the inflation layer in a sliding fit mode, notches are formed in one sides of the fixing bases, clamping pieces connected with the connecting belts in a clamping mode are arranged in the notches, and the clamping pieces are connected with the inflation layer in a sliding fit mode. A handle connected with the clamping piece is arranged on the outer side of the fixed seat; the nursing layer comprises a plurality of medicine containing boxes which are sequentially connected, and the medicine containing boxes are all arranged on one side of the inflation layer. According to the nursing device, the connecting belts are arranged on the outer side of the inflatable layer, and the tightness degree of the connecting belts can be adjusted according to the physical condition and actual requirements of a patient, so that it is ensured that the nursing device is stably attached to the body of the patient, and the situation of displacement or looseness in the using process is avoided.

The utility model discloses a contraction device of a tire antiskid chain, which comprises a rim, a tire sidewall arranged on the outer side of the rim, an antiskid chain arranged on the outer side of the tire sidewall, a connecting piece arranged on the antiskid chain, a tension bar arranged on the connecting piece, a port A and a port B respectively arranged at two ends of the tension bar, and a contraction device arranged on the antiskid chain. The retracting device comprises an A port, a shell, a rotating column, a movable shaft, a supporting arm, a pressing spring, a bumper, a movable rod, a blocking shifting piece, a rotating handle, a clamping groove and a B port. According to the anti-skid chain, the anti-skid chains on all the side faces are connected in series through elastic materials (such as springs and cow rubber bands) through the tension rods, then the two ends of each anti-skid chain are connected through the contraction devices, the port A and the port B are fixed to the upper end and the lower end of the rotating column, and the rotating column can be adjusted to adjust the tightness degree so as to adjust the tightness degree of the anti-skid chains; therefore, the chain is kept stable in the running process.

The utility model relates to the technical field of bundling machine, and disclose a kind of bundling device for wire packing, including base, the upper of base is provided with the control portion of being convenient for wire bundling;Wherein, control portion includes machine body, rotating plate, sliding slot, fixed plate and so on, this bundling device for wire packing, because rotating plate surface is set in the sliding slot of sliding slot and is penetrated with slide rod, while slide rod is penetrated with push block, and push block is penetrated with fixed plate and is slidably connected, so that fixed plate is located to push block, further in rotating plate rotation, arc sliding slot will resist slide rod and force slide rod to slide, to further make slide rod drive push block to slide, so that push block pushes arc block and moves to the axis of machine body, and through the arc block of three groups of circumferential array settings can make wire located in machine body can be concentrated and locked, it is convenient for staff to be subsequently bundled with wire by strapping, and by the stirring of stir rod, so that arc block adjusts the tightness degree of wire fixation.

The utility model discloses adjustable roll paper slicing equipment. The adjustable roll paper slicing equipment comprises a rack; the lifting device comprises a movable frame movably mounted on the rack; the rolling cutting assembly comprises a rolling cutting disc rotationally arranged on the movable frame and a rolling cutter installed on the periphery of the rolling cutting disc; the unwinding device comprises an unwinding roller rotationally arranged on the rack, a paper roll is wound on the unwinding roller, the paper roll is guided into the rolling cutting assembly in a paper tape mode in a rotating mode, and the paper tape is cut in a rolling mode through a rolling cutter; the winding device comprises a winding roller rotationally arranged on the rack, and the winding roller is used for receiving the paper tape sheared by the hobbing cutter; wherein the movable frame drives the rolling cutting assembly to move so as to increase or reduce the pressure of the rolling cutting disc or the rolling cutter on the paper tape. By means of the slicing equipment arranged in the mode, the problem that the tension degree of the paper tape cannot be adjusted through existing slicing equipment can be solved.

The invention discloses a split mounting type star orbit model, and relates to the technical field related to models, the split mounting type star orbit model comprises a base, the top end of a supporting seat is fixedly connected with a rotating rod, and the rotating rod is provided with a star orbit rotating device; the telescopic rotating mechanism is arranged outside the rotating rod; the splicing mechanism is connected with the telescopic rotating mechanism; the galaxy ball is arranged on the telescopic rotating mechanism through the splicing mechanism; and the tightness positioning mechanism is arranged in the rotating rod. By means of the arrangement mode that the telescopic rotating mechanism, the splicing mechanism, the galaxy ball and the tightness positioning mechanism are matched, the space occupied by the spliced model can be reduced through the telescopic rotating mechanism, the tightness degree of rotation of the galaxy ball can be adjusted through the tightness positioning mechanism, positioning and rotating at any time are facilitated, and the splicing efficiency is improved. And the stored telescopic rotating mechanism can be subjected to auxiliary positioning, rotating displacement during storage is prevented, and use is convenient.

The utility model discloses a minimally invasive cardiac surgery pericardium suspension device which comprises a shell, the interior of the shell is hollow, an avoiding hole is formed in the middle of the shell, an upper cover is arranged on the upper portion of the shell, a plurality of sets of retracting and releasing assemblies are arranged between the shell and the upper cover, and each set of retracting and releasing assembly is provided with a suspension rope in a matched mode. One end of the suspension rope is fixedly connected with the winding and unwinding assembly, and the other end of the suspension rope penetrates through the shell, extends into the avoiding hole and is fixedly connected with a working head; a plurality of groups of locking assemblies are arranged on the shell, and the locking assemblies are in one-to-one correspondence with the folding and unfolding assemblies; a doctor is allowed to adjust the extension length of the suspension rope as required through the arrangement of the retracting and releasing assembly, so that the suspension height and position of the pericardium are accurately controlled, and the clearness of the surgical field and the operation accuracy are ensured; due to the arrangement of the locking assembly, the operation stability is further enhanced, a doctor can adjust the tightness degree of the retracting and releasing assembly according to the operation process and requirements, and the stability of pericardium suspension is ensured.

The utility model relates to the technical field of driving motor testing, and discloses an automobile driving motor EMC on-load testing device which comprises a testboard, a sliding groove is formed in the top end of the testboard, a motor is fixedly installed at the side end of the sliding groove, a threaded rod is fixedly installed on an output shaft of the motor, a sliding block is sleeved on the outer wall of the threaded rod in a threaded mode, and a placing plate is fixedly installed at the top end of the sliding block. A stand column is installed at the top end of the placement plate, first air cylinders are symmetrically installed at the side ends of the stand column, fixing rings are fixedly installed at one side ends of the air cylinders, a driving motor is installed at the top end of the placement plate, a first rotating shaft is fixedly installed on an output shaft of the driving motor, and a first gear is fixedly installed on the outer wall of the first rotating shaft. A gear II is fixedly mounted on the outer wall of the rotating shaft II. According to the EMC on-load testing device for the automobile driving motor, by arranging the motor, the threaded rod, the sliding block, the first gear and the second gear, the driving motor can be replaced conveniently, and therefore the working efficiency of the device body is improved.

The utility model relates to the technical field of wood pulp fiber yarns, and discloses a flocculus removing device for wood pulp fiber yarn production, which comprises a bottom column, and a base is fixedly mounted at the top of the bottom column; the winding assembly is fixedly mounted at the top of the base; the winding assembly comprises a winding part and a rolling part; the flocculus removing assembly is fixedly mounted at the top of the supporting plate; the flocculus removing assembly comprises a flocculus removing part and a replacing part. By arranging a replacement part, when the dust collector is started, flocculent fibers are blocked outside by the second protective net, the telescopic rod and the blocking piece are started to ascend, then the long plate can be moved rightwards through the short plate, the long plate drives the first protective net to move rightwards, and after the short plate moves to a limit position, the telescopic rod and the blocking piece are started to descend to be connected with the long plate in a clamped mode. And meanwhile, the blocking piece on the right side is connected with the second protection net in a clamped mode, when the blocking piece passes through the interior of the second protection net, residual flocculent fibers in the second protection net are dredged and cleaned, and the effect that the dust collector is convenient to clean is achieved.

The application relates to the technical field of cleaning devices, and particularly discloses a taking mechanism of a cleaning device for an automobile equipotential terminal box, which comprises a rack, a driving motor arranged on the rack, a driving gear arranged on an output shaft of the driving motor, a first driven gear and a second driven gear arranged on the rack, the first driven gear and the second driven gear being oppositely arranged and being in mesh transmission with the driving gear, a transmission shaft arranged on the first driven gear and the second driven gear, one end of the transmission shaft being rotationally connected with the rack, a driving wheel being coaxially fixed on the transmission shaft, a transmission wheel being arranged on the single slide, and a power transmission assembly arranged on the rack and used for transmitting the rotating speed of the driving wheel to the transmission wheel. The application has the effect of improving the synchronization of the sliding of the mechanical hands on the two sides.

The utility model relates to the field of knitting machines, and discloses a knitting machine knitting track adjusting device which comprises a bottom plate, the upper surface of the bottom plate is fixedly connected with a first supporting plate and a second supporting plate, and the opposite side surfaces of the first supporting plate and the second supporting plate are slidably connected with a moving plate; a moving frame is slidably connected to the upper surface of the moving plate, two connecting shafts are fixedly connected to the inner side wall of the moving frame, and wire guide wheels are rotatably connected to the outer surfaces of the two connecting shafts; the height of the thread guide wheel is adjusted through up-down sliding of the movable plate, so that the height of knitting threads is adjusted, meanwhile, the horizontal position of the thread guide wheel is adjusted through left-right sliding of the movable frame, so that the horizontal position of the knitting threads is adjusted, multidirectional adjustment of the knitting threads is achieved, and the knitting quality and efficiency of the knitting machine are improved.

A fixing device for a port operation full-rotation tug fender is characterized by comprising a mounting seat, a connecting plate, a tightening screw, a first nut, a Y-shaped buckle, a fastening bolt, a second nut, a nylon cable tie and a lower end fixing assembly, the mounting seat is welded and fixed to a bulwark plate, and the connecting plate is welded and fixed to the inclined face of the mounting seat; a fixing hole is formed in the vertical portion of the connecting plate, a tightening screw penetrates through the fixing hole of the connecting plate and extends out to be connected with a first nut, a Y-shaped buckle is fixedly connected to the end, away from the position penetrating through the connecting plate, of the tightening screw, and two through holes formed in the Y-shaped buckle are connected with fastening bolts in a penetrating mode and extend out to be connected with a second nut. The fastening bolt is connected with one end of the nylon cable tie, the other end of the nylon cable tie is connected with the lower end fixing assembly, the fixing assembly is arranged below the lifting platform, and the problem that people are stumbled due to the fact that an original fixing assembly protrudes is solved.

The utility model relates to abrasive belt grinding machine relates to the technical field of abrasive belt grinding equipment, it includes workbench, the workbench is provided with the grinding seat and goes up and down, the end wall of grinding seat is provided with the grinding wheel and rotates, the top of grinding seat is provided with the gear box, the input shaft of gear box connects motor, the output shaft of gear box connects drive wheel, and the abrasive belt is collectively tensioned and is equipped with in drive wheel and grinding wheel, gear box bottom end fixedly set up have upper connecting plate, the top of grinding seat is fixedly set up and has lower connecting plate, and the horizontal setting of upper connecting plate and lower connecting plate between has the rotating shaft, the first threaded section and the second threaded section of opposite direction of rotation are provided with in the rotating shaft symmetry, the sliding block is provided with in the rotating shaft symmetry, the hinged setting of sliding block and upper connecting plate between has upper support rod, the hinged setting of sliding block and lower connecting plate between has lower support rod. The application has the effect that the abrasive belt on the grinding machine is replaced conveniently, satisfies different use demand.

The invention relates to an overhead line hot-line work robot synchronous belt on-line device and system.The device comprises a plurality of lifting hooks, a synchronous belt, on-line driving mechanisms and a connecting rod, lifting hook driving mechanisms corresponding to the lifting hooks in number are arranged on the connecting rod, and the lifting hooks are correspondingly arranged at the driving ends of the lifting hook driving mechanisms; one ends of the synchronous belts are connected with the corresponding positions of the two sides of the connecting rod, and the line feeding driving mechanisms are installed on the operation robot and are in transmission connection with the corresponding synchronous belts. The device can be conveniently hung on a working overhead cable through the lifting hook, the whole device and the working robot are driven by the wire feeding driving mechanism to do lifting motion together, automatic wire feeding of the synchronous belt is achieved, and the device is more portable, small in size and convenient to use. On-line operation can be automatically completed only by hanging a lifting hook on an aerial cable through an unmanned aerial vehicle or an insulating rod, potential safety hazards are reduced, the structure is simple and durable, the device can be applied to various complex terrains, and robot on-line operation is not limited by terrains and environments any more.

The utility model relates to the technical field of milling machines, in particular to a positioning tool for a milling machine, which mainly comprises a milling machine processing frame, a support plate is fixedly mounted at the bottom end of the milling machine processing frame, a bottom adjusting component is fixedly mounted in the middle of the inner side of the milling machine processing frame, and a mounting plate is in threaded connection with the top end of the bottom adjusting component. A fixed base is fixedly mounted on the left side of the top end of the mounting plate, a sliding adjusting assembly is slidably connected to the top end of the outer side of the fixed base, and a sleeving fixing assembly is fixedly mounted at the right end of the inner side of the fixed base. According to the positioning tool for the milling machine, by arranging the fixed base sliding adjusting assembly and exchanging and fixing of the sleeving fixing assembly, effective mounting, adjusting and fixing can be conducted in the using process, and the left end and the right end of a roller body can be stably clamped and fixed in cooperation with moving and pressing of the moving fixing assembly; and the tightness degree can be stably adjusted, so that the adjusting efficiency in the machining process is improved, and the product machining quality is ensured.

The utility model discloses a turnout height detection device, and belongs to the technical field of railway tracks. The device comprises two supports which are connected through a chord line, one end of the chord line is connected with a rotating shaft on one support and wound on the rotating shaft, and the other end of the chord line is connected with a force sensor on the other support. Therefore, after the two supports are fixed on the surface of a steel rail, the chord line can be tensioned by rotating the rotating shaft, the tension force of the chord line can be measured by the force sensor, the sagging amount of each position of the chord line can be calculated according to the measured tension force, and the height correction structure of each position of the chord line can be obtained by combining the height of each position of the chord line obtained by actual measurement. According to the utility model, the correction height of each position after a chord line droops during turnout height detection can be provided, and the turnout height detection accuracy is effectively improved.

A rapid yarn feeding mechanism of a drafting machine comprises a connecting plate, supporting legs are arranged at the two ends of the connecting plate, the middle positions of the inner sides of the two supporting legs are fixedly connected with the two ends of the connecting plate, a yarn leading roller and a cleaning device are arranged above the connecting plate, the two ends of the yarn leading roller are rotationally connected with the two supporting legs, and the cleaning device is arranged above the connecting plate. The cleaning device is located in front of the doffing roller and comprises a fixing block and comb teeth, supporting blocks are arranged on the front faces of the two supporting legs, the two supporting blocks are fixedly connected with the front faces of the two supporting legs, a yarn feeding roller and a drafting mechanism are arranged between the two supporting blocks, the drafting mechanism is located on the back face of a connecting plate, and the yarn feeding roller and the drafting mechanism are arranged on the back face of the connecting plate. The drafting mechanism is fixedly connected with the back face of the connecting plate, the cleaning device is arranged in front of the yarn leading roller, fiber chippings and sundries on passing yarn are rapidly removed and combed through comb teeth, and the conveying quality of the yarn and the use safety of the machine are guaranteed.

The utility model relates to the field of cable production and processing, in particular to an ink writer with a quick air-drying function, which comprises a bottom plate, a bottom frame is fixedly mounted on the upper surface of the bottom plate, a limiting wheel is rotatably connected to each of two ends of the bottom frame, a positioning block is slidably connected to each of two ends of the bottom frame, and the two positioning blocks are symmetrically mounted. A first driving rod is rotationally connected to the interior of the bottom frame, a bidirectional thread is formed in the outer surface of the first driving rod, a first gear is fixedly connected to the middle section of the first driving rod, and the first gear is a bevel gear. By arranging the limiting wheel, the positioning block and other components, the positioning block can clamp a cable through the limiting wheel through the mutual matching relation between the limiting wheel and the positioning block, so that the printing area of the cable can be in a tighter state, and the printing quality of the cable is improved. Therefore, the effect of adjusting the tightness degree of the cable by arranging the limiting wheel, the positioning block and other parts is achieved.

The disposable oropharyngeal airway convenient to fix comprises a wing piece and a tightening buckle, two fastening strips are connected to the surface of the wing piece in a hanging mode, clamping strips and clamping hooks are fixedly connected to the surfaces of the fastening strips, the clamping strips abut against the clamping hooks, a rope opening is formed in the surface of the tightening buckle, a bandage is connected to the rope opening, and the tightening buckle is connected with the wing piece in a hanging mode. The two ends of the bandage are connected with the fastening strips in a hung mode respectively, two anti-skid pieces are arranged on the inner wall of the tightening buckle, the bandage is located between the two anti-skid pieces, the bandage is clamped through the tightening buckle, after the breather pipe is placed into the oral cavity of a patient, the oropharynx airway can be fixed by pulling the bandage, the tightness degree can also be adjusted, and the oropharynx airway fixing device is suitable for being used by different patients. The position of the oropharynx airway is accurate, and the oropharynx airway is not prone to loosing and sliding.

The utility model discloses a side-locking adjustable helmet which comprises a helmet body, a bridle, protection rings rotationally installed on the two sides of the helmet body and sliding self-locking mechanisms arranged on one sides of the protection rings. The protection ring is suitable for being overturned to the front part to protect the jaw and the lips; the sliding self-locking mechanism comprises a sliding rail base arranged on one side of the protection ring and a sliding block assembled in the sliding rail base in a sliding mode. One end of the strap is fixed to the side, away from the sliding self-locking mechanism, of the helmet body, and the other end of the strap and the inner side of the sliding block are assembled in an opening and closing mode through a buckle. The tightness degree of the bridle can be adjusted by pushing the sliding block, and the sliding block can be self-locked and fixed in a normal state. The bridle is tied in a side locking mode, the tightness degree of the bridle can be adjusted by sliding up and down, operation is efficient and rapid, and stability is higher.

The utility model relates to the field of connectors, in particular to a transition connector which comprises a connector body, the connector body is provided with a first connecting part and a third connecting part, the first connecting part is connected with the third connecting part in a welded mode, the size of the first connecting part is smaller than that of the third connecting part, and the first connecting part is connected with the third connecting part in a welded mode. The third connecting part penetrates through the external plate body, and meanwhile, one end, deviating from the first connecting part, of the third connecting part is located on the inner side of the external plate body; the lock nut is connected with the third connecting part and is positioned on the inner side of the external plate body; and the locking piece is connected with the first connecting part and located on the outer side of the external plate body, and the locking nut and the locking piece are arranged to be capable of extruding the wall face of the external plate body. According to the utility model, the advantages of convenient joint angle adjustment, high practicability and simple structure can be realized by effectively utilizing the structural configuration of the joint.

The utility model discloses a kind of chain plate type upper unloading coil trolley tunnel cover plate, it is related to hot-rolled cold-rolled plate strip technical field, including side surface guide frame, sprocket, conveying chain, cover plate, top guide frame, pull rod and bottom guide frame and be set on the unloading coil trolley of conveying chain, conveying chain selects the conveying chain with L-shaped appendix plate, two conveying chains and a cover plate form a group of chain cover plate unit, sprocket is arranged above and below the two side walls of tunnel, the number of sprocket is four, sprocket plays the steering effect of chain cover plate, side surface guide frame is arranged on the side wall of tunnel, top guide frame is arranged above tunnel, bottom guide frame is arranged on the bottom surface of pit.The upper end of trolley top cover plate in the utility model is always a plane, when upper unloading coil trolley is transverse on track, chain cover plate moves along, run flexible, always guarantee that there is cover plate above tunnel, and the top surface of cover plate is flush with workshop terrace, safe and reliable.