38results about How to "Reduce the size of the force" patented technology

The invention discloses a three-dimensional hydraulic jacking machine and a three-dimensional jacking system. The three-dimensional hydraulic jacking machine comprises a frame, a main oil cylinder located on the top of the frame and suitable for sliding horizontally along the surface of the frame, a first lateral oil cylinder and a second lateral oil cylinder located on the circumferential side face of the main oil cylinder and a walking wheel assembly suitable for driving the frame to walk. One ends of the first lateral oil cylinder and the second lateral oil cylinder far away from the main oil cylinder are connected to the frame; and the main oil cylinder stretches along a Z direction, the first lateral oil cylinder stretches along an X direction and the second lateral oil cylinder stretches along a Y direction. The three-dimensional hydraulic jacking machine is compact in structure and flexible to lift, and multiple three-dimensional hydraulic jacking machines can be matched to operate to improve the lifting tonnage, so that the three-dimensional hydraulic jacking machine is suitable for centering and folding work of subsections of ship bodies and bridges and large steel structural parts.

The invention provides a multifunctional tin ore collecting, screening and packaging vessel and is suitable for offshore operation. The problem that in the prior art, a mining vessel is large in power waste and poor in wave resisting capability is solved. The multifunctional vessel comprises a vessel body, wherein a propeller is arranged at the tail portion of the vessel body, a bridge frame is hinged and connected to the vessel body through a bridge frame fixing base, a cutter suction head is arranged at the tail end of the bridge frame, a lifting winch for achieving lifting of the bridge frame is arranged on the vessel body, upper and lower layers of decks re arranged on the vessel body, a conical screen and a primary jigging machine which are vertically arranged are arranged on the upper layer of decks, and a secondary jigging machine located below the primary jigging machine is arranged on the lower layer of decks. The multifunctional tin ore collecting, screening and packaging vessel is suitable for tin ore collecting, screening and packaging in offshore zone operation, is small in power waste and has very good practicability.

The invention discloses a basement exterior wall single-face formwork supporting system. The basement exterior wall single-face formwork supporting system comprises multiple split screws and steel pipe inclined struts. An embedded steel bar is welded to one end of each split screw, and the other ends of the embedded steel bars are connected with the inner side of an underground supporting pile. One ends of the steel pipe inclined struts are fixedly connected with the side of a basement exterior wall, and the other ends of the steel pipe inclined struts are connected with the top ends of steelbar ground anchors pre-buried on the inner sides of a basement bottom plate. Hanging net grout spraying is arranged on the outer side of the underground supporting pile, and a full rack is arranged atthe top of the basement bottom plate. In the basement exterior wall single-face formwork supporting system, during basement exterior wall single-face formwork construction, inclined steel pipes withgood rigidity are used for transmitting transmitted horizontal lateral pressure to the ground anchors, horizontal force is converted into pressure to the building ground and shear force to the groundanchors, embedded bars on the supporting piles and the split screws planed on the concrete side face of the exterior wall are used for connecting and butt welding, an exterior wall formwork is reinforced, operation is overall safe and firm, stability is good, and the phenomenon that formwork exploding and formwork expanding happen during concrete pouring is avoided.

The invention discloses a two-way electromagnetic bench vise, which comprises a groove shell, the center of the upper surface of the groove shell is provided with a working groove interval, and the groove casing is located in the working groove interval The center of the interior is provided with a main hollow shell with an integrated structure, a 51 single-chip microcomputer is installed on the top of the main hollow shell, and an iron core with a coil on the side is installed in the center of the main hollow shell , the control input end of the coil is connected to the control output end of the 51 single-chip microcomputer through wires. The invention can perform electromagnetic force resistance on the threaded rod used for fastening, thereby reducing the force on the thread structure during fastening and enhancing its service life. In addition, the device has an anti-overload protection mechanism, which can effectively prevent In addition, the device can simultaneously fix two sets of parts, so the utilization rate is high and the practicability is strong.

The invention belongs to the technical field of float glass polishing, and discloses a polishing device and a polishing method for improving the flatness of float glass. The polishing device comprises a feeding mechanism, a polishing mechanism and a flushing mechanism, wherein the feeding mechanism comprises a shell and a conveyor belt device; a cleaning chamber and an installation chamber are arranged in the shell; the conveyor belt device is fixed into the installation chamber; the top surface of the conveyor belt device is higher than the top surface of the shell; a conveyor belt in the conveyor belt device adopts a fine mesh-shaped structure; a U-shaped plate, a guiding roller group and a cleaning fluid guiding box are further arrange din the installation chamber; and a belt guiding roller group is further arranged in the cleaning chamber. According to the polishing device and the polishing method for improving the flatness of the float glass provided by the invention, the processes of automatic feeding, automatic positioning, automatic polishing, automatic cleaning and drying and the like are combined, so that the working efficiency of the whole polishing device can be greatly improved; and the guiding roller group is contained in an automatic feeding structure, so that the separation between a polishing area and a cleaning area is effectively realized, and the polishing quality is ensured.

A road drilling detection device disclosed by the present invention comprises a rack fixed on a vehicle, the rack is in shaft connection with a supporting arm through a rotating motor, two ends of the supporting arm are respectively provided with a clamp holder, a coring drill cylinder is installed in the clamp holder, the top of the coring drill cylinder is in threaded connection with a top plate, and the center of the top plate is provided with a first connecting hole. A plurality of second connecting holes are evenly formed in the edge of the top of the coring drill barrel, an inner core barrel is inserted into the coring drill barrel, a positioning bolt fixedly connected with the inner core barrel is arranged on the side wall of the coring drill barrel, the inner core barrel comprises two barrel wall assemblies hinged together, and a mounting frame is fixed to the top of the rack; the end, facing the inner side of the vehicle, of the mounting frame is provided with a coring motor through a coring oil cylinder, and the end, facing the outer side of the vehicle, of the mounting frame is provided with a drilling motor through a drilling oil cylinder. The defects in the prior art can be overcome, a sample can be taken out conveniently, drilling coring and sample taking are carried out at the same time, and the sampling period is shortened to the maximum extent.

The invention discloses a support structure for bridge maintenance, comprising a support base and an auxiliary support base fixed on a horizontal support table, wherein a telescopic hydraulic cylinderis connected with a jacking seat through a piston rod, the side edge of the groove is symmetrically provided with a vertical sliding groove, both sides of the lower end of the ejector seat are provided with protruding plates integrally formed with the ejector seat, and the end of the protruding plate is connected with a pulley through a pin shaft, sliding grooves are arranged on both sides of theupper end of the support base, the auxiliary support base comprises an auxiliary support platform and a plurality of I-shaped platforms, through the butt joint protrusion plate of the I-shaped platform is slidably connected with the butt joint sliding groove, the I-shaped platforms can be stacked on each other until the upper end of the I-shaped platform contacts with the lower end of the bridge,so that the I-shaped platform of the jacking seat and the auxiliary support seat jointly plays a supporting role on the bridge, improves the supporting effect, and reduces the stress of the telescopic hydraulic cylinder.

The invention relates to a rotating shaft structure, a centrifugal air compressor and a vehicle. The rotating shaft structure comprises a rotor, an impeller assembly, a thrust disc, a first-stage radial bearing and a second-stage radial bearing, wherein the rotor comprises a first shaft section and a second shaft section which are sequentially arranged in the axial direction; the impeller assembly comprises at least one impeller, and the first shaft section and / or the second shaft section are / is sleeved with the impellers; the thrust disc is arranged on the first shaft section of the rotor in a sleeving manner; and the first-stage radial bearing is arranged on the first shaft section of the rotor in a sleeving manner, the second-stage radial bearing is arranged on the second shaft section of the rotor in a sleeving manner, and the length of the first-stage radial bearing is greater than that of the second-stage radial bearing, so that the force per unit area of the first-stage radial bearing is equal to that of the second-stage radial bearing. According to the rotating shaft structure, the length of the first-stage radial bearing is increased, so that the force per unit area of a radial support wave foil of the first-stage radial bearing is reduced, the rotor can be prevented from inclining towards the side where the first shaft section is located, and stable operation of the centrifugal air compressor is ensured.

An adjustable light-emitting diode (LED) lamp comprises a frame and a fixed frame. At least one LED optical module is contained in the frame, the fixed frame is located on two opposite borders of the frame and comprises an installation supporting plate and two adjusting frames, and the two adjusting frames are located on the installation supporting plate in a relative sliding mode. According to the adjustable LED lamp, due to the fact that at least one locating groove with a certain length is arranged in the installation supporting plate, and curve grooves are arranged in the adjusting frame, adjustment of the fixed frame in the length, width and height directions and on relative angles can be guaranteed so that the adjustable LED lamp can be adapted to different use environments.

The invention relates to the technical field of suspension devices, and discloses a portable product suspension box which comprises a box body and a Z-direction magnetic suspension mechanism arranged in the box body, wherein the Z-direction magnetic suspension mechanism comprises a Z-direction permanent magnet and at least three Z-direction electromagnets arranged around the Z-direction permanent magnet; the Z-direction permanent magnet and the Z-direction electromagnets are located at positions on the lower inner wall of the box body; a Z-axis direction extending up and down, an X-axis direction extending left and right and a Y-axis direction extending front and back by taking the box body as a reference are formed in the box body; and the magnetic pole direction of the Z-direction electromagnets after being electrified is opposite to that of the Z-direction permanent magnet. When a product with magnetism is arranged above the permanent magnet, a suspension effect can be generated by a repulsive force generated by the permanent magnet and an attractive force generated by the electromagnets, and therefore, the product can be better protected when being transported or exhibited by utilizing the suspension box disclosed by the invention.

The invention discloses a warning guardrail for building construction. The warning guardrail comprises a supporting frame, wherein the inner side of the supporting frame is rotationally connected with a protective baffle plate; storage grooves are uniformly formed in the surface of the protective baffle plate; moving slideways are arranged on the side surfaces in the storage grooves; the interiors of the moving slideways are connected with movable frame groups in a sliding manner; warning reflecting plates are fixedly connected to the surface of the outer part of the protective baffle plate and are positioned between the storage grooves; the middle position of the top of the protective baffle plate is fixedly connected with a limiting assembly; the top of the inner side of the supporting frame is fixedly connected with an overturning limiting mechanism; the middle position of the bottom end of the back surface of the supporting frame is fixedly connected with a bearing butt strap; and the surface of the bearing butt strap uniformly penetrates through and is connected with stable inserting rods in a sliding manner. The invention relates to the technical field of building construction. According to the warning guardrail for building construction, the structure is prevented from being damaged due to the fact that the guardrail is overturned too fast by wind power, meanwhile, a supporting effect is achieved for the guardrail, protection can be achieved, and effective use of the warning effect can be guaranteed.

The invention belongs to the technical field of heat-shrinkable film production auxiliary equipment, and particularly relates to a crease-resistant film-pressing mechanism for PE heat-shrinkable filmproduction. The crease-resistant film-pressing mechanism comprises a workbench and a lifting plate, wherein first fixing plates symmetric to each other are arranged at the two ends of the left side ofthe workbench; a prepressing roller is arranged between the two first fixing plates and rotatably connected to the inner walls of the first fixing plates; second fixing plates which are symmetric toeach other are arranged at the two ends of the right side of the workbench; and a winding drum is arranged between the two second fixing plates and rotatably connected to the inner walls of the secondfixing plates. According to the crease-resistant film-pressing mechanism, a heat-shrinkable film is stretched to be stressed, so that the heat-shrinkable film is more flat and prevented from wrinkling during winding; and meanwhile, the stretching distance of the heat-shrinkable film is adjusted by adjusting the vertical position of the lifting plate, so that the stress of the heat-shrinkable filmis reduced, the fracture deformation of the heat-shrinkable film caused by overlarge stress during winding is prevented, and the production efficiency is improved.

The invention discloses a special lifting appliance for loading and unloading square steel. The special lifting appliance comprises a fixed block and a movable clamping device, wherein movable arms are arranged at the left ends and the right ends of the front side and the rear side of the fixed block, fixed adjusting blocks are arranged at the upper ends of the outer walls of the first movable arms, lifting rod fixing blocks are arranged at the left corners and the right corners of the front side and the rear side of the fixed block, the lifting rod fixing blocks are connected to adjusting rods through lifting rods, a movable clamping device is arranged between fifth movable arms on the same side, and the top of the movable clamping device is connected to a fourth movable arm. According to the appliance, the adjusting rods match the fixed adjusting blocks, so that clamping by the movable clamping device is easily realized, the front and the rear of the fixed block are provided with movable arms, the lifting effect of the lifting appliance is improved, meanwhile, lifting stability is improved, the stress per unit area is reduced, damage to a coating on the surface of square steel during lifting is avoided, the fixing effect of the device on the square steel is improved, and the lifting appliance is more stable and safer to use.

The invention discloses a skylight frame with good stability. The skylight frame comprises a window seat, a skylight, a connecting mechanism and a filtering mechanism, wherein the connecting mechanism is arranged between the window seat and the skylight, the top end of the filtering mechanism is fixedly connected to the bottom end of the skylight, the bottom end of the filtering mechanism is slidably connected to the outer side of the window seat, the window seat comprises a seat body used for bearing the skylight, and the seat body is fixedly arranged on the outer side of the top end of a window opening. According to the skylight frame with good stability, gaps between the window seat and the skylight is blocked through the filtering mechanism arranged on the periphery of the bottom end of the skylight, outside mosquitoes, sundries and the like are filtered through filter screens and prevented from entering a room along with airflow to influence the normal life of a user, practicability of the skylight frame is enhanced, the filter screens can be effectively fixed and clamped through sliding grooves, the filter mechanism is prevented from being damaged when wind is too large, normal use of the filter mechanism is ensured, and the service life of the filter mechanism is prolonged.

The invention discloses a fan foundation reinforcing structure and a reinforcing method thereof, and belongs to the technical field of fan foundations. The fan foundation reinforcing structure is mainly composed of a plurality of supporting structures and a plurality of anchor cables embedded into a foundation. According to the reinforcing structure, the fan foundation and the supporting structures are locked and anchored through the anchor cables firstly, then the multiple supporting structures and a tower drum are supported and fixed to form a whole, and finally the purposes of reducing the stress of a foundation ring or an anchor rod in an original foundation, enabling the structural load to be distributed evenly, stabilizing a tower body and repairing and reinforcing the fan foundation are achieved. The fan foundation reinforcing structure is simple in structure and clear in force transmission, wet construction in the construction process is reduced, operation is convenient, the transportation and construction cost is reduced, the construction period is shortened, and good economic efficiency is achieved; and in addition, replacement can be conducted in the later period, and therefore the service life of the fan foundation is prolonged.

The invention relates to the technical field of building structures, and discloses a keel structure, a sound insulation curtain wall and a curtain wall system.The keel structure comprises a wall body, a connecting piece is fixedly installed on the side face of the wall body, and according to the keel structure, the sound insulation curtain wall and the curtain wall system, an original corner brace is changed into a reserved connecting piece similar to an I shape; the U-shaped inverted buckles are installed on the side faces of the main keels, the main keels are connected to the connecting pieces in a clamped mode through the inverted buckles, and therefore the keels can be fixed and positioned only by buckling the hooks into the connecting pieces, and the clamping grooves are further formed in the main keels. The ends of the auxiliary keels are clamped into the clamping grooves to be fixedly positioned and installed in the same mode as the main keels, and then the supporting blocks which are installed on the wall body, located below the auxiliary keels and used for supporting are combined to be matched, so that stable installation of the auxiliary keels is achieved, and the transverse bearing capacity of the auxiliary keels is improved. The installation operation of the whole keel frame structure is greatly simplified, the overall working efficiency is improved, and meanwhile later disassembly is facilitated.

The invention relates to an array type silencer with a stable structure.The array type silencer comprises a box body, a silencing mechanism, a fixing mechanism and a lifting mechanism, the silencing mechanism comprises two stand column sets, a silencing column is arranged between the two stand column sets, the fixing mechanism comprises a bolt rod, and a bolt head is arranged at one end of the bolt rod. According to the array type silencer with the stable structure, the silencing mechanisms are spliced through the fixing mechanism, due to the fact that bolt rod of the fixing mechanism is limited by a sleeve rod and a tension spring, the situation that the bolt rod loosens and falls off is avoided, the silencing column can be lifted through the lifting mechanism, and therefore the stress of the fixing mechanisms is reduced, and the stability of the mounting structure is improved. The box body is divided into the inner shell body and the outer shell body, inert gas is injected between the inner shell body and the outer shell body, and the carbon dioxide detector is installed, so that the damage condition of the structure can be found in time, the damage position of the structure is repaired, and the stability of the structure is ensured.

The invention provides a connecting device applied to an excavator and the excavator. The connecting device comprises a pin shaft for connecting a bucket rod and a swing arm and a buffer piece for providing buffer force to the pin shaft, wherein the bucket rod is inserted into the swing arm, and the pin shaft penetrates through the bucket rod and the swing arm, so that the bucket rod and the swingarm are rotatably connected; a baffle is arranged at the top of the pin shaft; and the buffer force is parallel to the axis line of the pin shaft, and the buffer force points away from the baffle. Byusing the connecting device, the service life of the pin shaft can be prolonged, the possibility of fatigue fracture of the baffle can be effectively reduced, and meanwhile, the reliability of the connection between the bucket rod and the swing arm is ensured.

The invention discloses a support structure for bridge maintenance, comprising a support base and an auxiliary support base fixed on a horizontal support table, wherein a telescopic hydraulic cylinderis connected with a jacking seat through a piston rod, the side edge of the groove is symmetrically provided with a vertical sliding groove, both sides of the lower end of the ejector seat are provided with protruding plates integrally formed with the ejector seat, and the end of the protruding plate is connected with a pulley through a pin shaft, sliding grooves are arranged on both sides of theupper end of the support base, the auxiliary support base comprises an auxiliary support platform and a plurality of I-shaped platforms, through the butt joint protrusion plate of the I-shaped platform is slidably connected with the butt joint sliding groove, the I-shaped platforms can be stacked on each other until the upper end of the I-shaped platform contacts with the lower end of the bridge,so that the I-shaped platform of the jacking seat and the auxiliary support seat jointly plays a supporting role on the bridge, improves the supporting effect, and reduces the stress of the telescopic hydraulic cylinder.

The invention relates to the technical field of power transmission equipment, and discloses a wire clamp for an overhead split wire spacer. The wire clamp comprises a spacer frame body, wherein the spacer frame body is fixedly connected with a first clamp sleeve, the first clamp sleeve is sleeved with a force bearing sleeve, and two ends of the force bearing sleeve are fixedly connected with firstfixing sleeves. According to the wire clamp for the overhead split wire spacer, when a wire swings, the acting force between the wire and the wire clamp is dispersed on each section of a force equalizing sleeve, so that the acting force of a single point is reduced. Meanwhile, two sections are mutually contacted and mutually supported, so that the swinging amplitude of the wire is reduced. In addition, a connecting elastic band between the two sections can also consume the swinging energy, so that the swing amplitude is further reduced, the damage effect caused by repeated swing is weakened,the service life of the wire and the wire clamp is prolonged. Meanwhile, the acting force of the first fixing sleeve on the wire is dispersed on a plurality of acting points through the force equalizing sleeve, so that the effect of force between the spacer and the wire is reduced.

The invention relates to the related field of lightning arresters, and discloses a lightning rod fracture device with fracture protection. The device comprises a main box body, wherein a power generator is arranged in the main box body; a contraction main belt wheel cavity is arranged at the upper side of the power generator; a contraction auxiliary belt wheel cavity is arranged at the upper side of the contraction main belt wheel cavity; a contraction sliding cavity with an upward opening and communicated with the outside is arranged at the upper side of the contraction auxiliary belt wheel cavity; and the outer side of the contraction sliding cavity is communicated with two contraction spur gear cavities which are arranged in a bilateral symmetry mode with the contraction sliding cavity as the center. According to the device, the cavities are driven through internal threads to sense the magnitude of external wind power, the purpose of automatically judging whether the wind resistance strength of the part, exposed outside, of the lightning rod needs to be enhanced or not is achieved, then a centrifugal driving block drives a drive shaft and all parts in the drive shaft to move downwards, the stress of external parts is reduced, the purpose of preventing the device fracture under the condition that the function of the device is not affected is achieved, and finally the purpose of preventing the broken part from falling is achieved through the matching effect of a fracture check block, an anti-falling pull rope and an anti-falling check block.

The invention discloses a two-way electromagnetic type bench vice. The two-way electromagnetic type bench vice comprises a groove shell. A working groove range is arranged at the center of the upper surface of the groove shell, a main hollow shell body is arranged at the center, in the working groove range, of the groove shell, wherein the groove shell and the main hollow shell body are of an integrated structure, a 51single chip microcomputer is installed at the top of the main hollow shell body, an iron core with the side face being sleeved with a coil is installed at the center of the interior of the main hollow shell body, and the control input end of the coil is connected with the control output end of the 51single chip microcomputer through a wire. According to the two-way electromagnetic type bench vice, an electromagnetic type strength resisting effect can be conducted on a threaded rod used for fastening, so that stress magnitude of a threaded tooth structure in the fasteningprocess is reduced, and the service life of the two-way electromagnetic type bench vice is prolonged; and in addition, the two-way electromagnetic type bench vice is provided with an anti-overloadingprotective mechanism, the phenomenon that a thread is damaged due to the fact that the twisting strength is overlarge can be effectively prevented, moreover, the two-way electromagnetic type bench vice can simultaneously fix two sets of parts, the utilization rate is high, and the practicability is high.

The invention discloses a sheath used for a retractor for spinal surgery, which comprises a plate-shaped sheath body made of elastic material. The plate-shaped sheath body is composed of a plurality of sheath units, and one side of the sheath unit is provided with There is an adhesive layer, and the adhesive layer is provided with anti-adhesive paper, and the other side of the sheath unit is provided with a plurality of trumpet-shaped protrusions, and the openings of the horn-shaped protrusions face the outside of the sheath unit. The invention has the characteristics of simple, quick and safe operation.

The invention discloses a connecting structure for top blocks of molds, which comprises a universal sliding seat and a cylindrical knockout pin, wherein the universal sliding seat is provided with a positioning hole, the knockout pin passes through the positioning hole, the connecting structure also comprises a socket head cap screw and a U-shaped positioning block, the lower end of the knockout pin passes through the universal sliding seat, the lower end of the knockout pin is provided with gaps along the circumferential direction thereof, the height of each gap is matched with the thickness of the U-shaped positioning block, the distance between two branch plates of the U-shaped positioning block is matched with the distance between two gaps in the knockout pin, the two branch plates of the U-shaped positioning block are inserted into the gaps of the knockout pin, the universal sliding seat and the U-shaped positioning block are provided with mounting holes, and the socket head cap screw after passing through the mounting holes connects the universal sliding seat with the U-shaped positioning block. The connecting structure disclosed by the invention is stable in structure, a phenomenon that the screw is loosened or fractured is not easy to occur, and the knockout pin and the U-shaped positioning block can be engaged stably and firmly; used parts are all common parts, therefore, the connecting structure is low in cost; and the connecting structure is simple and firm in structure, and convenient for mass production, popularization and application.

An adjustable LED lighting (100), which comprises a frame bracket (130), a fixing bracket (140), and at least one LED optical module (23) housed by the frame bracket (130). The fixing bracket (140) is fixed on two opposite edge brackets of the frame bracket (130). The fixing bracket (140) comprises an installation support panel (19) and two adjusting brackets (20). The two adjusting brackets (20) are arranged in a relatively slidable manner on the installation support panel (19). The adjustable LED lighting (100) utilizes at least one positioning groove (197) having a certain length and provided on the installation support panel (19) and curved grooves (2031) on the adjusting brackets (20) to ensure for the fixing bracket (140) adjustments of opposite angles in the lengthwise, widthwise, and height-wise directions, thus adapting to different use environments.

The invention discloses a national park range rapid identification system in the technical field of park equipment, and the system comprises a supporting rod, the top end of the supporting rod is provided with a mounting seat, the upper surface of the mounting seat is rotatably provided with a mounting rod, the outer side wall of the mounting rod is provided with a display and a processing device, and the processing device is electrically connected with the display. The included angle between the displayer and the wind direction is reduced by rotating the mounting rod above the mounting base, and when the front face or the back face of the displayer in the device is subjected to large wind force, the mounting rod can rotate above the mounting base, so that the displayer rotates along with the mounting base to be used for reducing the included angle between the displayer and the wind blowing direction, and the displayer tends to be parallel to the wind direction; therefore, the stress of the display is reduced, and the overall installation stability of the display and equipment is ensured.

The invention discloses a hybrid floating breakwater with safety. The hybrid floating breakwater is composed of a flexible floating body and a rigid box body, wherein a supporting frame is arranged atthe flexible bottom; the supporting frame is connected with the rigid box body through a connecting anchor chain; and the rigid box body is fixed to an anchor pier arranged at the seabed through an anchoring anchor chain. The hybrid floating breakwater is simple in structure, convenient in material obtaining, good in wave dissipation effect and safe, can provide effective shielding for sea areassuch as aquaculture, artificial bathing beach, yacht wharf and port wave resistance, and is wide in application range.

The invention provides a tire forming drum with an improved structure. The tire forming drum with the improved structure comprises a main shaft, and circular ring-shaped side plates arranged on two sides of the main shaft, wherein a plurality of arc-shaped drum plates are arranged around circumferential directions of the side plates; multiple groups of telescopic devices for driving the drum plates to radially move in a reciprocating way are arranged on the main shaft between the two side plate; each drum plate is formed by radially stacking and fixedly connecting an inner layer plate and an outer layer plate; and the inner layer plates and the outer layer plates are formed by aluminum honeycomb plates and carbon fiber cloth wrapped, cured and adhered to the surfaces of the aluminum honeycomb plates. Since the drum plate parts are made of the aluminum honeycomb plates and the carbon fiber cloth, the weight of the drum plates is greatly reduced, the forming quality of a tire blank cannot be influenced, and the stress size of the main shaft is reduced, so that the manufacturing cost and the maintenance cost of the main shaft can be reduced, and the tire production cost is further reduced.

The invention discloses a wheelchair scale capable of data analysis and safety monitoring based on the Internet of Things. The wheelchair scale comprises a placing plate, wherein an elastic mechanism for applying elastic force to a wheelchair is arranged below the placing plate, the elastic mechanism comprises a lifting column, the lifting column is fixedly mounted on the lower surface of the placing plate, a bottom plate is movably mounted on the placing plate through the lifting column, a round limiting plate is fixedly installed below the lifting column, and the round limiting plate is attached to the lower surface of the bottom plate. Through movement of the lifting column, the distance between the placing plate and the bottom plate is changed, a third spring can deform, reverse elastic force is generated, the placing plate is made to move upwards, and after the placing plate is subjected to too large pressure, the stress of the placing plate can be relieved. When the device is used for detection, the pressure of the wheelchair can be relieved, the detection weight of the wheelchair can be improved, and meanwhile, when the device bears too large force above the force, internal original parts cannot be damaged.