14447results about How to "Prevent loosening" patented technology

The invention relates to the technical field of tunnel engineering, in particular to an anti-collapse comprehensive treatment construction process for a tunnel to pass through a karst development area, which comprises the following steps: S1, early-stage exploration and planning: understanding a geological structure, karst development condition and underground water distribution along the tunnel in detail through drilling exploration, geological radar and seismic wave exploration; according to the anti-collapse comprehensive treatment construction process for the tunnel crossing the karst development area, the construction strategy is adjusted according to the actual geological condition, geological risks are treated more accurately, the construction progress is accelerated by adopting modern technologies and equipment such as geological radars, accidental interruption is reduced, comprehensive treatment measures are accurately controlled, and the construction efficiency is improved. The safety of the construction process is greatly improved, the influence on the surrounding environment is reduced, pollution is reduced by using environment-friendly materials and technologies, meanwhile, novel supporting materials and design are adopted in the construction technology, the novel supporting materials comprise a reinforcing mesh, anchor rods and sprayed concrete, immediate and lasting supporting is provided, and rock mass loosening and collapse are prevented.

The invention relates to the technical field of bolt mounting equipment, in particular to an angle steel tower bolt perforation mounting method. By means of autonomous navigation of the installation robot and flexible operation of the mechanical arm, rapid positioning and taking-out of bolts and nuts are achieved, and the risk of manual climbing and operation is reduced. Accurate insertion and preliminary positioning of the bolt are ensured through accurate control of the mechanical arm, then the fastening effect is enhanced by combining impact tightening with the intermittent hammering technology, the fit clearance between the angle steel is effectively eliminated, and the bolt is prevented from loosening. The whole process is highly automatic, personal errors are reduced, and the mounting quality and the working safety are improved.

The utility model discloses a cable winding machine in the technical field of winding machines, which comprises a bottom plate, a winding mechanism for winding a cable is arranged on one side of the top of the bottom plate, and the bottom surface of the winding mechanism is connected with a moving mechanism for conveniently taking down the wound cable. By arranging the adjusting mechanism, a user can adjust the distance between the arc-shaped plates to be a winding ring suitable for the diameter size of a cable according to the use requirement, winding reels of different sizes do not need to be replaced back and forth, operation is easy, practicability is improved, secondly, the tensioning mechanism and the driving mechanism are arranged to work in a matched mode, and the working efficiency is improved. The driving mechanism can drive the tensioning mechanism to reciprocate according to the winding operation, so that the cable can be wound while being pulled, the cable can be wound uniformly and orderly, the phenomena of cable stacking and the like are effectively avoided, the tensioning degree of the tensioning mechanism can be adjusted by rotating a lead screw, and the winding efficiency is improved. And cable loosening is avoided.

The invention relates to the technical field of cable connection, in particular to a cable connector which comprises a columnar shell, and a clamping assembly, a connecting assembly, an insulating assembly and a locking assembly are sequentially arranged in the columnar shell from left to right. The clamping assembly, the connecting assembly, the insulating assembly, the locking assembly and the columnar shell are in threaded fit in sequence, multi-stage fixation of the cable is completed, the firmness of the cable is improved, and the clamping assembly, the connecting assembly, the insulating assembly and the locking assembly can be connected, matched, restrained and limited mutually; the overall stability is greatly improved while the connection is convenient, and the cable can be further prevented from loosening or falling off when being stressed; and meanwhile, the arranged insulation assembly not only can insulate and separate a plurality of wires of the cable, avoid mutual interference among the wires and provide protection for the wires, but also can tightly abut and fix the wires by utilizing the abutting piece, so that the overall stability among the plurality of wires is improved.

The invention discloses a laser cutting device for steel structure production and machining, and relates to the technical field of steel structure production and machining.The laser cutting device for steel structure production and machining comprises a cutting table, a sliding groove is fixedly formed in the surface of the cutting table, and a cutting machine is slidably mounted on the inner wall of the sliding groove; the fixing device comprises a sliding plate, a hydraulic cylinder, a first clamping plate, a second clamping plate, a rotating shaft, a first tooth block, a second tooth block, a third tooth block, a first inclined block, a fixing plate, a sliding plate, a second inclined block, a first telescopic elastic rod, a sliding plate, a second inclined block, a second telescopic elastic rod, a linkage block, a limiting block and a rotating plate. And then the sliding plate moves to clamp the materials, so that the situation that the cutting precision is poor due to material shaking is further avoided during cutting work, automatic adjustment is conducted according to the shape of the steel structure, and the stability of the workpiece in the cutting process is guaranteed.

The utility model discloses a prefabricated pump tower base reinforcer which comprises a platform plate and a pump tower base body, a reinforcer body is arranged below the pump tower base body, and a mounting groove is formed in the upper surface of the platform plate; threaded holes are formed in the platform plates, a plurality of screws are connected into the reinforcer body in a penetrating mode, limiting grooves are formed in the side faces of the screws, and a through opening is formed in the middle of the reinforcer body. An elastic ball and a supporting piece are arranged in the reinforcing piece body. According to the prefabricated pump tower base reinforcer, the reinforcer body is arranged in the shape of the Chinese character'jing ', so that the reinforcer body does not need to be in circular butt joint with a lower opening of the pump tower base body, site construction is facilitated, and impact force can be effectively buffered through elastic force of the elastic balls when a pump tower runs; and meanwhile, the structural strength of the reinforcer can be improved by utilizing the supporting piece, so that the reinforcer can bear larger impact force.

The invention discloses a hydrogen fuel cell unmanned aerial vehicle hydrogen cylinder positioning device which comprises a front fixing plate, a rear fixing plate is installed on the rear portion of the front fixing plate through a connecting rod, a tightening sliding groove is formed in the surface of the front fixing plate, and a tightening sliding bolt is embedded in the tightening sliding groove. A tightening supporting rod is installed below the tightening sliding bolt through a bolt, a tightening sliding plate is slightly attached to the outer side of the tightening supporting rod, a tightening sliding plate is installed on the inner surface of the rear fixing plate through a tightening supporting block, a tightening protection plate is welded to one end of the tightening supporting rod, and a tightening wheel is installed in the tightening protection plate through a bearing; an adjusting sliding groove is formed in the surface of the front fixing plate, and an adjusting moving bolt is embedded in the adjusting sliding groove. By means of the supporting legs, the hydrogen cylinder support, the gas guide structure and the downward pressing top seat, the problems that according to an existing hydrogen fuel cell unmanned aerial vehicle hydrogen cylinder positioning device, the hydrogen cylinder is still installed at the upper position, the flight stability of an unmanned aerial vehicle is likely to be affected, the hydrogen cylinder is unstable after being installed and likely to shake in the flight process, and the unmanned aerial vehicle cannot work easily are solved. And rapid mounting and dismounting are not convenient.

The invention discloses a steel structure node connecting member, and relates to the field of steel structure connecting pieces, the steel structure node connecting member comprises an H-shaped steel stand column and an H-shaped cross beam, the end part of the H-shaped cross beam is flatly attached to a flange plate of the H-shaped steel stand column, and joining plates are symmetrically arranged on two sides of a web plate of the H-shaped cross beam; the two side portions of the connecting plate are fixedly connected with a flange plate of the H-shaped steel stand column and a web plate of the H-shaped cross beam through split bolts and web face bolts respectively, the positioning bolt vertically penetrates through the flange plate of the H-shaped cross beam, a nail sleeve is arranged on the surface of the connecting plate, and the positioning bolt penetrates through the nail sleeve in a matched mode. The connecting plate is fixed to the H-shaped steel stand column and the H-shaped cross beam through the split bolt and the ventral face bolt, foundation fixed connection between the H-shaped steel stand column and the H-shaped cross beam is achieved, the positioning bolt penetrates through the nail sleeve on the surface of the connecting plate and is used for positioning the plane position of the connecting plate, and the situation that the connecting plate outwards abuts against nuts of the split bolt and the ventral face bolt due to vibration is relieved; and the strength of the connecting plate attached to the H-shaped steel stand column and the H-shaped cross beam is improved.

The invention discloses a method for preventing a high-carbon tool steel hot rolled steel coil from being flattened, which comprises the following steps of: providing a continuous casting slab which comprises the following components in percentage by mass: 0.65 to 1.35 weight percent of C, 0 to 1.6 weight percent of Si, 0 to 1.2 weight percent of Mn, 0 to 1.2 weight percent of Cr, less than or equal to 0.030 weight percent of P, less than or equal to 0.030 weight percent of S and the balance of iron and inevitable impurities; the charging temperature of the continuous casting sheet billet is larger than or equal to 300 DEG C, the continuous casting sheet billet is fed into a heating furnace to be heated, the discharging temperature of the continuous casting sheet billet is 1150-1250 DEG C, and a first sheet billet is obtained; the first plate blank is subjected to rough rolling, the rough rolling and finish rolling temperature ranges from 1050 DEG C to 1150 DEG C, and an intermediate blank is obtained; the intermediate billet is subjected to finish rolling, the finish rolling temperature of finish rolling is 800-950 DEG C, and finish rolled steel is obtained; laminar cooling is conducted on the finish-rolled steel in a front-section centralized cooling mode, final fine adjustment water and front and rear side spraying of laminar cooling are closed, the temperature of the finish-rolled steel is reduced to the first target temperature to the phase transformation point, and cooled steel is obtained; and the cooled steel is coiled at the temperature of 590-690 DEG C, the coiling tension is increased by 10%-20% in the coiling process, and a hot rolled steel coil of the high-carbon tool steel is obtained.

The invention discloses a heat exchanger with a protection function for biodiesel preparation, and relates to the technical field of heat exchangers, the heat exchanger comprises heat exchange equipment and further comprises a protection device, a control device is fixedly installed on the front side of the heat exchange equipment, a liquid inlet pipe is fixedly installed on the left side of the heat exchange equipment, and a placing frame is fixedly installed on the left side of the heat exchange equipment; wherein the protection device comprises a connecting pipe, an adjusting hole, an adjusting frame, an L-shaped rod, a protection groove, a rotating rod, a protection disc and a limiting groove, the L-shaped rod moves upwards to be separated from the adjusting hole and release limiting of the connecting pipe, and after limiting of the connecting pipe is released, the connecting pipe is manually pushed to move in the direction close to the oil storage tank for butt joint; and through the protection disc, loosening or displacement of the connecting pipe caused by the fact that an operator accidentally touches the L-shaped rod can be effectively prevented, and therefore the risk of leakage or accidents is reduced.

The invention discloses a stable pressure sensor joint connector, and relates to the field of automobiles, the stable pressure sensor joint connector comprises a pressure sensor body, a reserved interface end and a reserved connecting cable, the reserved interface end is installed on the outer side of the pressure sensor body, and the reserved connecting cable is inserted into the inner side of the reserved interface end; and the outer side of the reserved interface end is fixedly connected with an elastic external extension end. According to the stable pressure sensor joint connector, a user only needs to rotate the nested threaded piece to enable the nested threaded piece to rotate towards the external threads along the outer side of the external extension end, so that the external extension end extending outwards from the outer side threaded end is stably pressed inwards, and the external extension end gradually approaches inwards in a self-adaptive manner; the external self-locking positioning requirement of the reserved connecting cable with different external plugging shapes is met, the butt joint part realizes a self-locking working state in the working process, the undesirable phenomena of falling and loosening in the long-term vibration process of the interior of an automobile are avoided, and the overall sensing quality and sensing precision are ensured.

The utility model discloses a cable tension testing machine which comprises a fixed base, a scale groove, a stretching assembly, a first connecting frame, a second connecting frame, a tension detection assembly and a clamping ring assembly. The scale groove is located at the top end of the fixed base, the stretching assembly is located on one side of the fixed base, the first connecting frame is located on the outer side of the stretching assembly, the second connecting frame is located on the inner side of the fixed base, the tension detection assembly is located on one side of the second connecting frame, and the clamping ring assembly is located at the top ends of the first connecting frame and the second connecting frame. Compared with the prior art, the cable clamping device has the advantages that a cable can be uniformly and annularly clamped when tension is detected, so that the stress of the cable is more uniform, the clamping is more stable, and the cable is effectively prevented from loosening.

The invention relates to the technical field of cable connection, in particular to a cable connecting mechanism and a cable structure.The cable connecting mechanism comprises a connecting insulating pipe, cable bodies are inserted into the two ends of the connecting insulating pipe respectively, a plurality of cable cores are arranged in the cable bodies, a plurality of metal sleeves are fixedly arranged in the connecting insulating pipe, and the cable cores are matched with the metal sleeves in an inserted mode; a plurality of pressing assemblies are arranged on the connecting insulating tube, semicircular blocks are arranged on the pressing assemblies, two insulating blocks are fixedly arranged on the semicircular blocks in a symmetrical structure, the insulating blocks sequentially penetrate through the metal sleeve and the connecting insulating tube to extend to the outside, two protection assemblies are fixedly arranged on the outer wall of the connecting insulating tube in a symmetrical structure, and protection blocks are arranged on the protection assemblies. The outer peripheral walls of the two ends of the connecting insulating tube are sleeved with clamping assemblies. The cable connection process is simplified, the connection efficiency is improved, the connection stability and reliability are improved, the sealing performance and safety of cable connection are ensured, the stability and anti-falling performance of cable connection are improved, and the cable body is prevented from falling off or loosening accidentally.

The invention provides an aluminum alloy plate automatic slitting device, and relates to the technical field of slitting devices.The aluminum alloy plate automatic slitting device comprises two supporting frames, adjusting grooves are formed in the supporting frames on the two sides, a movable platform is movably installed in each adjusting groove, and placement assemblies used for adjusting the distance are installed in the supporting frames on the two sides and the movable platforms correspondingly; first right-angle teeth on a rod body of a driving rod can be engaged with second right-angle teeth on the inner wall of a matching arc plate, and the first right-angle teeth and the second right-angle teeth are matched through an inclined plane during fixing, so that a wobble wheel is rotated and a supporting bulge moves upwards to realize transmission of locking power; in order to avoid looseness of individual slitting circular knives, in the rotating process of the driving rod, first right-angle teeth and second right-angle teeth are matched through inclined faces, after individual slitting circular knives are locked, the rest of slitting circular knives are continuously locked through contraction of supporting springs, and it is ensured that each slitting circular knife is stably fixed.

The invention discloses a pipeline welding angle fixing device for water conservancy projects, and relates to the technical field of water conservancy projects, the pipeline welding angle fixing device comprises a base, a welding arm and pipelines, the welding arm is arranged at the top of the base, the pipeline welding angle fixing device further comprises clamping devices, and the two pipelines of the same size are placed on the clamping devices on the left side and the right side respectively; by pulling the sliding rod and the connecting rod rightwards, the L-shaped frame can achieve inner supporting and clamping of the pipeline, displacement or deformation of the pipeline in the welding process can be effectively prevented through inner supporting and clamping of the pipeline, at the moment, the pipeline is fixed, and after the pipeline is fixed, mistaken touch prevention is achieved by rotating the round rod and the pincer-like button to clamp the pipeline; the clamping device can be prevented from displacing or loosening in the working process, the pipeline is driven to rotate through the first servo motor, the first gear, the second gear and the triangular support, the angle of the pipeline can be adjusted through the rotary clamping device according to needs, and a welding worker can conduct welding in the most comfortable working posture.

The utility model discloses an explosion-proof junction box with a good sealing effect, which belongs to the field of junction boxes and comprises a box body, two ends of the bottom of an inner cavity of the box body are fixedly connected with supporting clamping plates, the lower ends of two sides of the box body are provided with through holes, and the middle end of the top of the box body is movably connected with a screw rod through a bearing. The threaded part of the screw rod is in threaded connection with a movable plate; according to the utility model, through the arrangement of the through holes, the arrangement of wires connected in the box body is facilitated, through the arrangement of the screw rod, the moving plate, the air guide cylinder, the piston, the vertical rod, the fixed clamping plate and the supporting clamping plate, the effect of effectively clamping and fixing the wires is achieved, and the situation that the wires are loosened due to the stress in the use process is effectively avoided, so that the service life of the wires is prolonged. And meanwhile, under the action of cooperation among an air guide cylinder, a piston and a hollow rubber ring, the space between the electric wire and the through hole can be blocked, and the sealing effect in the whole using process is effectively improved.

The invention discloses an automatic discharging device of a welding line, belongs to the technical field of advanced manufacturing, and aims to solve the problems that an existing device is low in installation efficiency, and the safety risk of a working place is increased due to reduction of the suction force of a suction cup. The automatic discharging device of the welding line comprises a vertical frame, a conveying belt is arranged on the vertical frame, a transferring device is arranged on the vertical frame in a sliding mode, a driving mechanism can drive the transferring device to move in the transverse axis direction of the vertical frame, the transferring device is located above the conveying belt and the containing platform, and a controller is arranged in the transferring device. Assembling and disassembling can be rapidly completed, the overhauling efficiency and the working efficiency are improved, meanwhile, air can be compressed to blow the surfaces of products, fine dust particles on the surfaces of the products are effectively removed, it is ensured that the suction cups and the surfaces of the products are well sealed, and then the adsorption effect is improved.

The utility model relates to the technical field of clamps, and discloses a hydraulic clamping device which comprises a base, the top of the base is fixedly connected with a fixing block, an elastic assembly is arranged in the fixing block, and a collecting assembly is arranged on the outer wall of the base. The elastic assembly comprises a circular groove, the top of the fixing block is detachably connected with a cover plate, and the bottom of the cover plate is fixedly connected with a fixing spring. The hydraulic clamping equipment is provided with a circular groove, a cover plate, a fixed spring, a circular plate, a circular hole, a circular block, a long rod and a pressing block, after a workpiece is clamped and fixed, the pressing block is pulled upwards to enable the fixed spring to contract, the pressing block is rotated to change the direction, the pressing block is loosened to enable the fixed spring to rebound, and the pressing block presses the workpiece through the elastic force of the fixed spring; and the fixing effect is enhanced, the workpiece which is not firmly clamped is prevented from suddenly loosening or flying out in the machining process, and the requirements of people are met.

The invention discloses a PICC infusion protection sleeve facilitating observation and infusion, and relates to the technical field of medical instruments. The invention provides a PICC (Peripherally Inserted Central Catheter) transfusion protective sleeve with ventilation and wiping functions and convenient for observation and transfusion, which comprises a shell, connecting soft plates, a mounting plate, a first connecting plate, a hinged cover plate, a sealing cover, a covering plate, a filter screen, an electric push rod and the like, the shell is fixedly connected with the paired connecting soft plates, the shell is clamped with the mounting plate, the mounting plate is fixedly connected with the first connecting plate, and the first connecting plate is fixedly connected with the hinged cover plate. The first connecting plate is rotatably connected with a hinged cover plate, the first connecting plate and the hinged cover plate are fixedly connected with sealing covers, the hinged cover plate is slidably connected with a covering plate, the covering plate is fixedly connected with a filter screen, and the hinged cover plate is fixedly connected with an electric push rod. By means of the electric push rod, the filter screen and other components, ventilation and heat dissipation can be conducted when the temperature in the protective sleeve is high, the situations that due to the too high temperature, arms of a patient sweat greatly, and an intubation part is infected are avoided, and the comfort and safety of the protective sleeve are improved.

The invention provides an aviation plug mechanism, and belongs to the technical field of aviation plugs, the aviation plug mechanism comprises an interface assembly and a plug assembly, the interface assembly comprises a connecting plate, a sleeve located on the connecting plate and a plurality of conductive parts located in the sleeve, and the plug assembly comprises a plug body and a connecting sleeve located at one end of the plug body and coaxial with the sleeve. A plurality of jacks are formed in one end of the plug body and correspond to the conductive parts respectively, a sealing block is slidably connected in the sleeve in a sleeved mode, a plurality of through grooves are formed in the sealing block and correspond to the conductive parts respectively, an annular groove is formed in the side, away from the connecting plate, of the sealing block, and a guide groove communicated with the annular groove is formed in the side wall of the sealing block; an annular protection plate is rotatably installed in the annular groove, and a plurality of through holes corresponding to the plurality of through grooves are formed in the annular protection plate, so that external dust is prevented from adhering to the conductive part and the jacks, and the signal transmission quality is not affected.

The utility model discloses an anti-blocking modularized drum bag breaking mechanism. The bag breaking mechanism comprises a module screen, a blocking and separating part, a feeding rolling ring, a discharging rolling ring, a driving device, a hooking and cutting knife assembly, a spiral primary cutter and a base. The module screen adopts a split type module screen and a split type screen body module, screen units are fixed in the radial direction and the axial direction, and the screen body module is a high-strength three-dimensional framework; the upper end of a three-dimensional screen pipe is connected with a screening hole of a screen unit, and the lower end of the three-dimensional screen pipe is connected with a separation hole of the lining plate; the feeding rolling ring and the discharging rolling ring are connected to the outermost side end ring of the module screen, and the lower ends of the feeding rolling ring and the discharging rolling ring are driven by the driving device in a rolling friction mode. A plurality of hook cutting knife assemblies are installed on the screen body module in a staggered mode, and a plurality of spiral primary cutting knife arrays are installed on the feeding rolling ring. The utility model has the effects of quick and low-cost maintenance, high-efficiency sorting without blockage, and comprehensive utilization of the original equipment.

A first wiring pipe and a second wiring pipe are detachably connected in a splicing mode, the inner side of the end face of the first wiring pipe is provided with an extrusion conical groove, and the end face of the second wiring pipe is provided with a rubber embedding and sealing block in a bonding mode at the position corresponding to the extrusion conical groove. According to the utility model, the end sleeves, the built-in annular air bags, the air injection pipes and the rubber sealing rings are arranged at the end parts of the first wiring pipe and the second wiring pipe, so that the built-in annular air bags can be conveniently injected with air after weak current line connection, and the built-in annular air bags are deformed after air injection; therefore, the rubber sealing ring on the inner side is driven to tightly abut against the outer side of the weak current circuit, so that the weak current circuit and the end parts of the first wiring pipe and the second wiring pipe are sealed, and the weak current wiring joints in the first wiring pipe and the second wiring pipe are protected. And external impurities are prevented from entering to influence the connection and use of the weak current line.

The invention discloses a large-section tunnel excavation supporting system crossing a fault fracture zone, which comprises a plurality of self-propelled advanced large pipe sheds arranged on a tunnel vault before excavation and a plurality of advanced small pipes arranged on a tunnel side wall, after excavation of each layer is completed, steel-like fiber concrete is preliminarily sprayed on the top arch and the side wall of the corresponding excavation face, system anchor rods are constructed, then multiple steel supports are arranged on the top arch and the side wall of the corresponding excavation face in the longitudinal direction of the tunnel, and a plurality of cover-weight-free consolidation grouting holes are evenly formed in the top arch and the side wall of the whole section for grouting; and then a plurality of system anchor rods and drainage systems are evenly arranged on the top arch and the side wall of the excavation face, then reinforcing meshes are arranged between the steel supports, and then secondary injection of imitated steel fiber concrete is conducted. The problems that in the prior art, when a tunnel crosses a fault fracture zone, roof fall and collapse accidents are prone to occurring through common excavation supporting measures, and the construction safety and the project progress are seriously affected are solved.

The invention relates to the technical field of building construction, in particular to an assembly type prefabricated part connecting structure and a construction method.The assembly type prefabricated part connecting structure comprises a first wing plate and a second wing plate, the first wing plate and the second wing plate are installed at the two ends of a prefabricated wall correspondingly, an assembly groove is formed in the surface of the first wing plate, and an assembly plate is integrally formed on the surface of the second wing plate; when the two edge grooves provided with the first wing plates and the second wing plates are spliced, the splicing plates are inserted into the splicing grooves, mounting grooves are formed in the upper ends and the lower ends of the splicing plates, inserting handles are inserted into the two sides of the mounting grooves, and the ends, away from the mounting grooves, of the inserting handles are inserted into the surfaces of the splicing grooves. The fabricated prefabricated part connecting structure and the construction method have the beneficial effects that through splicing of the first wing plates and the second wing plates and cooperation of the splicing plates and the splicing grooves, firm connection between prefabricated wall bodies is achieved. And meanwhile, due to the pre-fixing design of the insertion handle and the positioning groove, the connection stability is further enhanced, and the problems of dislocation and looseness in the wall splicing process are effectively avoided.

The invention relates to the technical field of armoring machines, and provides a cable copper strip armoring machine which is used for winding a copper strip on a moving core wire to form an armoring wire, a first sleeve is provided with a first hole channel, two ends of the first hole channel are respectively a bare wire inlet and an armoring wire outlet, and the core wire enters the first hole channel through the bare wire inlet and enters the armoring wire outlet through the armoring wire outlet. The armored wire moves out of the first hole channel through the armored wire outlet, the first sleeve is further provided with a first belt inlet, and a copper belt enters the first hole channel through the first belt inlet. The first compression roller is rotationally arranged on the first sleeve and is in rolling butt joint with the surface of the armored wire; the two second pressing rollers are rotationally arranged in the first belt inlet and abut against the surface of the armored wire in a rolling mode. According to the technical scheme, the problems of winding path deviation, winding clearance, loosening after winding, insufficient compactness and the like in the copper strip armoring process caused by deformation of a certain degree due to the fact that the cable and the copper strip are possibly subjected to various external forces in the production, transportation and installation processes in the prior art are solved.

The utility model relates to the technical field of building construction, and discloses a material lifting mechanism for building a steel structure shed, which comprises a base, a lifting component is mounted at the top of the base, a lifting bin is fixedly connected to the top of the lifting component, a winding roller is rotatably connected to the inside of the lifting bin, a lifting rope is fixedly connected to the periphery of the winding roller, and the lifting rope is fixedly connected to the top of the lifting component. A mounting plate is fixedly connected to the outer wall of the hoisting bin, a motor is fixedly connected to the top of the mounting plate, a self-locking assembly is mounted in the middle of the mounting plate, a lubricating assembly is mounted in the middle of the hoisting bin, and an output assembly is mounted at the bottom of the mounting plate. According to the self-locking device, after the motor stops running, the self-locking assembly can rapidly trigger a locking mechanism, it is ensured that the lifting rope is firmly fixed through the friction effect of the self-locking wheel and the rubber ring and the cooperation of the clamping column and the spring, and the risk of loosening of the lifting rope or falling of materials can be effectively avoided even in unforeseen circumstances.

The invention discloses a wearable small animal electrical stimulation device, and belongs to the technical field of medical instruments, the purpose of connection is achieved by plugging a wiring terminal into an electric plugging seat, a pressing ring extrudes a piston cylinder after being pressed, gas is guided into a gas cushion ring through a gas pipe, and the gas cushion ring is connected with the wiring terminal. The air cushion ring expands and drives a plurality of sealing rings to be embedded into a sealing groove outside the power connection socket, the purpose of sealing connection between the fixing sleeve and the power connection socket is achieved, the situation that water seepage and dust accumulation are caused by a gap between the fixing sleeve and the power connection socket is prevented, and the end of a clamping strip in the locking assembly can retract into a sliding way after being pressed, so that the sealing effect is improved. When the clamping strip moves to the clamping groove, the clamping strip can be clamped into the clamping groove through elastic support of the second spring, so that the purpose of locking the position of the electric socket is achieved, and the situation that the electric socket and the wiring terminal are loosened due to the fact that a small animal is subjected to stress reaction when being electrically stimulated and a wire is pulled is prevented; and the use stability and the experiment precision of the electrical stimulation device are ensured.

The invention provides a cutting device for plastic packaging bag processing, and relates to the field of plastic bag cutting equipment. A cutting mechanism is arranged on the front side of the upper end face of the body, and a second rectangular groove is formed in the front side of the upper end face of the body. A conveying mechanism is installed in the second rectangular groove, a plastic packaging bag roll material is conveyed on the conveying mechanism, and a heat sealing mechanism is installed on the rear side of the upper end face of the main body. According to the upper pressing mechanism of the cutting device, through cooperation of the circular rotating disc, the annular limiting piece, the rectangular through opening, the first circular plate, the second circular plate, a rectangular locking plate block and a guide sliding rod, the phenomenon that a driving nut is loosened can be avoided, and the reliability of the upper pressing mechanism of the cutting device during pressing is improved; the problems that in the plastic packaging bag roll material conveying process of a traditional heat-sealing and cold-cutting type cutting device, a threaded rod in a pressing mechanism is prone to loosening due to stress, and then the reliability of the pressing mechanism on the cutting device during pressing is reduced are solved.

The invention is applicable to the technical field of backwash atomizing nozzles, and provides an atomizing nozzle with a backwash filter, the atomizing nozzle comprises a mounting cylinder, the mounting cylinder is composed of a left connecting cylinder, a right connecting cylinder and a rotating ring, and a filter bin is arranged between the left connecting cylinder and the right connecting cylinder; a first fixing rod is fixedly connected between the filtering bin and the left connecting cylinder, a second fixing rod is fixedly connected between the filtering bin and the right connecting cylinder, and a water inlet structure is arranged on the surface of the left connecting cylinder and used for supplying water into the filtering bin; according to the invention, the rotating ring is matched with the first connecting mechanism and the second connecting mechanism, and the water flow direction in the filter bin can be switched after the rotating ring is rotated, so that the filter element can be conveniently backwashed, and stains generated by backwashing can be discharged, thereby being beneficial to improving the backwashing efficiency of the device and prolonging the service life of the device. And meanwhile, a user does not need to know the rotating direction or closing sequence of the multiple valves, and therefore the user can use the valve conveniently.

The utility model belongs to the technical field of waste gas purification, and particularly relates to a waste gas purification device which comprises an activated carbon adsorption box and a pretreatment box, a first motor is fixedly installed on the inner wall of the activated carbon adsorption box, a driving screw is fixedly installed at the output end of the first motor, and a threaded sleeve is installed on the driving screw in a penetrating mode. One end of the threaded sleeve is fixedly installed on a baffle, a filter plate is fixedly installed on the baffle, a sliding rail is arranged below the filter plate and fixedly installed at the bottom of an activated carbon adsorption box, a sealing groove is formed in the inner wall of the activated carbon adsorption box, and a sealing strip is arranged at the joint of the baffle and the activated carbon adsorption box. And a knob switch is mounted on the activated carbon adsorption box. The filter plate in the device can be conveniently replaced and cleaned through the mounting and dismounting structure pushed by the motor, the mounting and dismounting processes of the filter plate are time-saving and labor-saving, the replacement and cleaning processes are convenient and fast, the pressure of workers is relieved, and meanwhile, the maintenance cost and time are reduced.