129 results about "Dovetail joint" patented technology

The invention provides an adjustable energy-consumption-enhanced anti-seismic reinforcing system between pavilion-type wooden column frames, which belongs to the technical field of ancient building wood structure reinforcement and comprises an adjustable cross beam reinforcing system between common battledore columns and an adjustable energy-consumption-enhanced reinforcing system between columns. The adjustable cross beam reinforcing system between the common patting square columns comprises two sets of connecting assemblies I and a wood cross beam connected with the two sets of connecting assemblies I; the inter-column adjustable energy consumption reinforcing system comprises two sets of connecting assemblies II and a dovetail tenon beam connected with the two sets of connecting assemblies II. Through the synergistic effect of the adjustable cross beam reinforcing system between the common battlecolumns and the adjustable energy consumption reinforcing system between the columns, the anti-seismic performance of the pavilion type wood structure is remarkably improved, and meanwhile the original self-resetting characteristic and the use function of the pavilion type wood structure are effectively reserved.

The invention relates to the technical field of motors, in particular to a magnetic conductance motor adopting a magnetic conductance reinforcing material, which comprises a stator assembly and a rotor assembly which are concentrically arranged, and the rotor assembly is arranged in the stator assembly. The stator assembly is formed by radially positioning and splicing 12-24 silicon steel sheet inserts through a dovetail joint structure, traditional lamination gap loss is eliminated, T-shaped teeth (iron-nickel-based magnetically soft alloy 1J34 / 1J36) which are deeply embedded (1 / 3-1 / 2 of the tooth height) are combined, the magnetic circuit conduction efficiency is remarkably optimized through the high magnetic conductivity (larger than or equal to 60,000 H / m) and the saturation flux density (larger than or equal to 1.5 T), and the magnetic saturation risk is avoided; a non-magnetic stainless steel base body (304 / 316) is adopted on the rotor side to block a stray magnetic circuit, and a low-loss magnetic field closed loop is formed by matching the magnetism gathering design of a V-shaped neodymium iron boron insert (Br is larger than or equal to 1.2 T, Hc is larger than or equal to 900 kA / m, and the included angle is 60-90 degrees) and directional magnetism conduction of a 20-30-degree fan-shaped angle magnetic barrier insert, so that the purposes of high efficiency, low consumption, high reliability and low cost are achieved.

The utility model discloses a laminated wood end anti-cracking structure which comprises laminated wood, a cover plate and steel nails. The end of the laminated wood is provided with an inclined first slope, the middle of the laminated wood is provided with an insertion block consistent with the slope in gradient, the bottom of the laminated wood is provided with a check block, the corresponding position of the cover plate is provided with a second slope and an insertion groove which are matched with each other, the bottom of the insertion groove is provided with an opening and a receding groove, and the insertion block and the insertion groove are matched and tightly attached and coated with polyurethane adhesive to enhance connection stability. The inserting grooves are in a dovetail groove shape and prevent the laminates from degumming and cracking in the vertical direction, the steel nails are arranged at the joints of the cover plates and the laminated wood, the cover plates are prevented from loosening and falling off, the laminates are prevented from sliding and cracking in the horizontal direction, the cover plates are in a triangular prism shape matched with the whole laminated wood, and the appearance and use are not affected. The structure effectively prevents the end of the laminated wood from cracking, prolongs the service life, and is reasonable in design, high in practicability and suitable for protecting the end of the laminated wood product.

The invention provides a fabricated continuous free-form surface laminated wood ceiling system and a construction method thereof. The system comprises a main structure steel beam, a steel column flange, a free-form surface laminated wood main body panel, a dovetail joint structure and a hidden F-shaped metal connecting piece. The laminated wood main body panel completes back rough machining, joint machining, turn-over front rough machining and front accurate machining in the factory stage through an industrial robot, and integrated high-precision manufacturing of the free-form surface appearance and the assembly joint is achieved. Adjacent laminated wood components are connected through customized dovetail tenons, the laminated wood main body panels are in prefabricated connection with the main structure steel beams through hidden F-shaped metal connecting pieces, and the laminated wood main body panels are not exposed out of a visible face after being installed. The ceiling modules are integrally assembled and glued in a factory, and are integrally hoisted and connected with steel column flanges and bolts on site to complete installation, so that an assembly type construction mode with high prefabrication rate and low field dependence is realized.

The utility model discloses a power distribution box capable of being assembled and used for a three-phase four-wire meter box and a single-phase meter box. The power distribution box comprises the three-phase four-wire meter box, a power box and the single-phase meter box which are assembled and connected. A first dovetail tenon is arranged on one side, connected with the three-phase four-wire meter box, of the power box; a first dovetail mortise is arranged on one side, connected with the single-phase meter box, of the power box; a second dovetail mortise corresponding to the first dovetail tenon is arranged on one side, connected with the power box, of the three-phase four-wire meter box; the side, connected with the power box, of the single-phase meter box is provided with a third dovetail tenon corresponding to the first dovetail mortise. The three-phase four-wire meter box and the single-phase meter box are arranged on the two sides of the power box respectively, the three-phase four-wire meter box and the single-phase meter box share the power box, lines of a plurality of power supply points are reduced, meanwhile, the three-phase four-wire meter box, the power box and the single-phase meter box are arranged to be of a detachable tenon-and-mortise connection structure, and when a single component part is damaged, the three-phase four-wire meter box and the single-phase meter box can be replaced by the detachable tenon-and-mortise connection structure. And disassembly and maintenance of a single component can be realized, and the maintenance cost is reduced.

The utility model discloses a wear-resistant alloy block structure of a screw conveyer, which comprises a base body and a first wear-resistant block, the first wear-resistant block is arranged above the base body, a first dovetail tenon is arranged at the bottom end of the first wear-resistant block, a first dovetail groove is arranged at the top end of the base body, the first dovetail tenon and the first dovetail groove are mutually clamped, and the first dovetail tenon and the first dovetail groove are arranged on the base body. Two groups of studs and first bolts are mounted in the first dovetail groove, the studs and the first bolts extend into first wear-resistant blocks, the first wear-resistant blocks are fixedly connected with the base body through the studs and the first bolts, and a second wear-resistant block is arranged on one side of the base body; and a second dovetail joint is mounted on the side wall of the second wear-resistant block. According to the utility model, the wear-resistant alloy block can be conveniently cast and produced, the wear-resistant alloy block can be conveniently contacted with materials from different positions, wear-resistant protection is provided, the frequency and time for replacing the wear-resistant alloy block are reduced, and the use efficiency of the conveyor is improved.

The utility model discloses a spliced honeycomb type inner floating disc which comprises a plurality of floating disc single bodies, each floating disc single body comprises a shell and a honeycomb inner core, an opening is formed in the bottom of each shell, the honeycomb inner cores are installed in the shells, at least three lap joint seats which are in lap joint with the honeycomb inner cores are arranged on the inner walls of the shells, and the lap joint seats are evenly distributed in the circumferential direction of the shells. The honeycomb inner core is installed on the lap joint seat through a fastening bolt, a joggle joint mechanism is arranged at the top of one side of the shell, a positioning mechanism is arranged at the bottom of the shell on the same side, the joggle joint mechanism comprises a plurality of dovetail joints which are arranged side by side, and grooves matched with the dovetail joints are formed in the tops of the adjacent floating disc single bodies. According to the utility model, the plurality of floating disc single bodies are arranged, so that the whole floating disc is modularized and split, the length of the floating disc is reduced, and transportation and stacking are facilitated; by arranging the joggle joint mechanisms and the positioning mechanisms, the adjacent floating disc single bodies can be quickly mounted, and the mounting stability is good; and by arranging the lap joint seat, the honeycomb inner core can be quickly mounted.

The utility model relates to the technical field of building construction discloses a kind of ALC wallboard connecting structure, including ALC wallboard one and the ALC wallboard two of being set in ALC wallboard one side, further include: multiple connecting pieces, connecting piece includes dovetail tenon one, the dovetail tenon two of being set in the one end of dovetail tenon one and the installation slot being opened on dovetail tenon one, the connecting block for adjusting the spacing between dovetail tenon one and dovetail tenon two is slidably inserted in the inside installation slot and fixed on dovetail tenon two.The utility model is reasonable in structure, can be connected to ALC wallboard, can be conveniently adapted by construction personnel to regulate and control connecting piece, can be conveniently loaded on ALC wallboard by construction personnel, and it is convenient to use.

A reusable modular structural member that may replace wooden structures used in concrete forming, transportation, marine, and construction applications. The reusable modular structural member includes a structural profile with first and second sides; a plurality of support beams extending from the first to the second side; at least two fasteners, one at a first end and another at a second end of each of the plurality of ribs; and a groove on a first edge and a tongue on a second edge that are configured to form a dovetail joint that can attach two reusable modular structural members of similar configuration. A reusable modular member can include the modular structural profile and interfacial layers covering the first and second sides. The reusable modular member may be made by extruding the structural profile and molding a plastic polymer to external portions of the structural profile to form the interfacial layers.

The utility model relates to the technical field of conveyor baffles, and discloses a belt conveyor side baffle device capable of preventing materials from falling, which comprises a fixing frame, a fixing plate is arranged at the top of the fixing frame, a dovetail groove is formed in the front side of the fixing plate, a dovetail tenon is fixedly connected to the rear side of the fixing plate, and a limiting block is slidably connected to the inner wall of the fixing plate. The rear side of the limiting block is fixedly connected with a first spring, the rear end of the first spring is fixedly connected with the inner wall of the fixing plate, and the top of the limiting block penetrates through and extends to the top of the fixing plate. According to the fixing device, the dovetail joint on one fixing plate is inserted into the dovetail groove of the other fixing plate, at the moment, the limiting block clamps the dovetail joint under the action of the first spring, so that the two fixing plates are rapidly fixed, the sliding block is pushed to drive the limiting block to move backwards when disassembly is needed, and therefore the two fixing plates are rapidly disassembled; and flexible splicing according to different requirements is realized.

The utility model relates to the technical field of shutter strips, and discloses a shutter strip which comprises a shutter strip and a connecting strip, the top of the inner wall of the shutter strip is fixedly connected with a first clamping ring, the middle of the inner wall of the shutter strip is fixedly connected with a fixing block, a second clamping ring is fixedly connected between every two adjacent fixing blocks, and the first clamping ring and the second clamping ring are fixedly connected. A plurality of first clamping columns and a plurality of second clamping columns are fixedly connected to the outer wall of the connecting strip, a dovetail groove is formed in one end of the connecting strip, a dovetail tenon is fixedly connected to one end of the connecting strip, a square groove is formed in the outer wall of the connecting strip, and an anti-corrosion coating is arranged on the outer wall of the blade strip. According to the utility model, the plurality of leaf strips are assembled in sequence, so that the top of one leaf strip is matched with the bottom of another leaf strip, the joint is U-shaped, the ventilation is not influenced, the light can be well shielded, the privacy can be protected, mosquitoes can be blocked, and the dovetail groove and the dovetail tenon at the two ends of the connecting strip can be assembled at any length.

The utility model discloses a novel photovoltaic aluminum alloy profile, which belongs to the technical field of aluminum profiles and comprises an integrally formed profile body, a clamping groove for clamping a photovoltaic panel is arranged on the upper portion of the profile body, the top groove edge of the clamping groove is of a double-wall closed cavity structure, and an arc-shaped anti-overflow protrusion extending towards the inner side is arranged on the top groove edge opening. A connecting plate with a dovetail joint is arranged on the lower portion of the profile body, a groove is formed in the bottom groove edge of the clamping groove, and the end of the groove is connected with an inclined supporting plate. A containing cavity for containing a corner connector is formed in the portion, between the clamping groove and the connecting plate, in the profile body, a screw groove is formed in the lower end of the containing cavity, and a supporting table extending outwards is formed on the outer side of a groove opening of the screw groove. The photovoltaic aluminum alloy profile assembly frame is convenient to operate and high in practicability, and effectively solves the problems of poor bonding strength and durability between an existing photovoltaic aluminum alloy profile assembly frame and a photovoltaic panel.

The application relates to the technical field of steel structure assembly type buildings, and discloses a dovetail type modular steel structure house, which comprises a modular house, side plates A and B, positioning plates A and B, dovetail joints and a sealing plate; the side plates A and B are respectively welded on two adjacent modular houses; the positioning plates A and B are located in a cavity surrounded by the modular house and two side plates A and two side plates B; the positioning plate A is provided with a dovetail joint hole A, and the positioning plate B is provided with a dovetail joint hole B; the dovetail joint is inserted into a positioning opening formed by the dovetail joint hole A and the dovetail joint hole B; the dovetail joint is buckled on the positioning plate B through a pre-locking buckle; and the sealing plate is screwed and connected at the front and back ends of the positioning plates A and B and is used for sealing the positioning plates A, the positioning plates B and the dovetail joint. Based on the traditional mortise and tenon structure, the dovetail joint and the corresponding dovetail joint hole are precisely designed, so that the modular houses are quickly and accurately connected.

The invention is entitled "Improved Turbomachine Rotor Assembly". A rotor assembly (300) is disclosed that includes a rotor (34) having a dovetail slot (36). The dovetail slot (36) includes a plurality of recesses (44) and a first radially innermost surface (210). A rotor blade (20) includes an airfoil (22) extending radially outward from a platform (31) and a dovetail (32) extending radially inward from the platform (31). The dovetail (32) includes a plurality of projections (40) extending in opposite directions received by the plurality of recesses (44) of the dovetail slot (36). A second radially innermost surface (46) defines a channel (33) from a leading edge surface (25) to a trailing edge surface (27). A shim (52) is positioned within the channel (33) and between the first radially innermost surface (210) of the dovetail slot (36) and the second radially innermost surface (46) of the dovetail (32). The shim (52) extends radially at least partially along both the leading edge surface (25) and the trailing edge surface (27) to secure the rotor blade (20) within the dovetail slot (36) during various operating conditions of a turbomachine.

The utility model discloses a hexagonal honeycomb splicing structure based on bidirectional dovetail tenon magnetic attraction, and particularly relates to the field of splicing materials, the hexagonal honeycomb splicing structure comprises a hexagonal honeycomb, three sides of the surface of the hexagonal honeycomb are provided with dovetail tenon grooves, and the other three side surfaces of the hexagonal honeycomb are provided with clamping strips; the dovetail mortises and the clamping strips are arranged on the surfaces of the hexagonal honeycombs, the dovetail mortises and the clamping strips are arranged on the surfaces of the hexagonal honeycombs in a staggered mode, and the cross sections of the dovetail mortises and the cross sections of the clamping strips are in a matched state. The magnetic sheets arranged in the dovetail mortises and the clamping strips attract each other, so that the multiple groups of hexagonal honeycombs can be stably connected, meanwhile, the hexagonal honeycombs can be disassembled more easily through the rolling wheels arranged in the clamping strips, and meanwhile, the hexagonal honeycombs are conveniently pushed to move through the inclined grooves formed in the two ends of the extension plates.

The invention discloses a workpiece coordinate origin alignment tool and a circular workpiece coordinate origin alignment method, and solves the technical problems of small alignment range, long adjustment time, low alignment precision and difficulty in control of the pressing degree of a lever meter measuring head caused by the fact that a rotary meter type meter clamp is mounted on a main shaft in a magnetic attraction manner. The workpiece coordinate origin alignment tool comprises a main shaft chuck, an upper sliding rail, a lower sliding rail and a threaded lead screw. The dovetail groove is matched with the dovetail joint, so that the lower sliding rail can slide relative to the upper sliding rail; a first lever meter mounting hole and a second lever meter mounting hole are formed in the lower sliding rail; a tensioning groove penetrating through the top face and the bottom face of the lower sliding rail is formed in one end of the lower sliding rail. A first threaded hole is formed in the lower sliding rail, one end of the threaded lead screw is connected with the lower sliding rail through the first threaded hole, and the inner side wall of the other end of the threaded lead screw abuts against the side wall of the upper sliding rail. The spindle chuck is located at the top of the upper sliding rail, one end of the spindle chuck is detachably connected with the upper sliding rail, and the other end is detachably connected with a spindle of external machining equipment.

The utility model discloses a wood floor, which comprises a base layer and a surface layer, the top surface of the base layer is provided with a dovetail groove, the dovetail groove is arranged perpendicular to the trend of wood fibers on the base layer, a dovetail joint is arranged in the dovetail groove, and the surface layer is glued on the top surfaces of the base layer and the dovetail joint; a left buckling edge and a right tongue edge which are used for buckling are arranged on the two side edges, in the wood fiber direction, of the base layer respectively, the middle of the left buckling edge is concaved inwards to form a groove, the groove is opened outwards in the side direction, the upper portion of the right tongue edge protrudes outwards to form a protruding block, and the outer contour of the protruding block is consistent with the inner contour of the groove. The dovetail joint is arranged perpendicular to the trend of wood fibers on the base layer, the inclined edge of the dovetail can convert transverse tension into friction force and extrusion force of the contact face of the tenon and the groove, the self-locking effect is achieved, meanwhile, the dovetail joint can adapt to dry shrinkage and wet expansion of wood, and the service life of the wood is prolonged. The problem that connection of a wood floor splicing structure is loosened due to cracking of a glue line is effectively solved.

The utility model relates to the technical field of glass fiber reinforced plastic carriage wallboards, and discloses an environment-friendly glass fiber reinforced plastic composite carriage wallboard, which comprises a wallboard main body, and vertical connection fully-hidden dovetail tenons or flush connection fully-hidden dovetail tenons are respectively arranged at the connecting positions of the side edges of the wallboard main body according to different purposes. A fixing device is fixedly connected between the wallboard main bodies, the flush joint fully-hidden dovetail joint comprises a flush joint mortise, a flush joint tenon, a first flush joint attaching groove, a first flush joint attaching block, a second flush joint attaching block and a second flush joint attaching groove, the flush joint mortise is formed in one end of the wallboard main body, and the flush joint tenon is formed in the other end of the wallboard main body; by arranging the fixing device, the vertical connection fully-hidden dovetail joint and the flush joint fully-hidden dovetail joint and adopting the installation mode that bolts and mortise and tenon joints are combined, connection between the compartment wall plate and the compartment body is more flexible, fine adjustment and replacement of the position of the wall plate can be conveniently conducted according to actual requirements through the connection mode, and the installation is convenient. And the maintenance cost is reduced.

[Problem] To stabilize the shape of a wooden casing of an artificial satellite to withstand use in outer space. [Solution] According to the present invention, a wooden casing is constructed by assembling six wooden panels 201 to 206 in a cuboid shape, mutually adjacent wooden panels among two wooden panels 201, 202 that face each other in the X-axis direction and two wooden panels 203, 204 that face each other in the Y-axis direction, among the six wooden panels, being joined together using hidden dovetail joints, wherein the two wooden panels 203, 204 that face each other in the Y-axis direction are connected to four Y-direction couplers 34 in order to suppress loosening of the structure of the wooden casing associated with contraction of the wooden panels 201 to 206.

The utility model discloses a composite aluminum-plastic floor, which comprises a floor main body, an adhesive layer and a plasticizing layer, the floor main body is made of aluminum alloy, a plurality of dovetail grooves are arranged on the surface of the floor main body at intervals, the plasticizing layer is combined on the surface of the floor main body through the adhesive layer, the adhesive layer forms dovetail tenons nested in the dovetail grooves, and the dovetail tenons are embedded in the dovetail grooves. The plasticized layer and the floor main body are combined more tightly, and the dovetail tenon plays a role in pulling the adhesive layer, so that the adhesive layer can be prevented from being separated from the surface of the floor main body, and the plasticized layer is always adhered to the floor main body.

The invention relates to the technical field of computer hardware, in particular to a bunching structure of a computer, which comprises a combined bunching plate and a splicing adsorption part, the combined bunching plate is composed of a bunching seat and a mounting seat which are integrally formed by insulating rubber, the bunching seat is provided with an X-axis wiring groove and a Y-axis wiring groove which are mutually vertically staggered and communicated, and the inner wall of the bunching seat is provided with an arc chamfer; screw holes are formed in the top; and the splicing adsorption piece comprises a trapezoidal clamping groove in the bottom of the mounting seat and an embedded trapezoidal magnet clamping block, so that a dovetail tenon-shaped embedded structure is formed. According to the invention, classified arrangement of cables is realized through the X / Y axial wiring grooves, double mounting modes of bolt fixation and magnetic attraction are provided by the screw holes and the magnet clamping blocks, and a dovetail tenon type embedding structure supports splicing of a plurality of wire boards and adapts to different case spaces; the insulating rubber material and the arc-shaped chamfer can protect the cable from being extruded and damaged by friction, so that the problems of disordered management, single installation, inconvenient splicing and easy damage of the cable of the existing cable bunching structure are solved, and the rationality and reliability of cable arrangement are improved.

This invention relates to the field of highway slope protection technology and discloses a prefabricated cavity differentiated filling greening and drainage prefabricated retaining wall, including a foundation pad and a retaining wall assembly. The retaining wall assembly is installed on the upper surface of the foundation pad and includes a prefabricated panel, a prefabricated support plate, a prefabricated joint reinforcement, a prefabricated side cover, and a prefabricated grate. The prefabricated panel is installed on the upper surface of the foundation pad, the prefabricated support plate is inserted into the inner wall of the first recess, the prefabricated joint reinforcement is inserted into the inner wall of the second recess, and the prefabricated grate is snapped between the two prefabricated panels on the front and rear sides and abuts against the upper surfaces of the prefabricated support plate and the prefabricated joint reinforcement. This device achieves efficient construction, stable structure, smooth drainage, and ecological greening through rapid foundation assembly, rapid assembly of the wall with dovetail tenon joints, and differentiated filling of the cavity in layers. It effectively solves the defects of traditional retaining walls, such as slow construction, poor drainage, and lack of greening, and meets the needs of efficient and environmentally friendly highway slope protection.

The utility model discloses a prefabricated interlocking type ecological slope protection brick, which relates to the technical field of ecological slope protection, and comprises a regular hexagonal slope protection brick, the regular hexagonal slope protection brick is composed of six brick bodies, the top of each brick body is provided with a trapezoidal bulge, the bottom of each brick body is provided with a trapezoidal groove, and the outer surface of each brick body is fixedly provided with a dovetail tenon. The outer surface of the brick body is further provided with mortises matched with the dovetail tenons, the surface of the brick body is provided with through type water permeable grooves, the mortises and the dovetail tenons are mutually embedded, the back face of the brick body is provided with a plurality of anti-skid grooves at equal intervals, and the dovetail tenons and the mortises are symmetrically arranged on the two sides of the water permeable grooves respectively. Compared with the prior art, the device has the beneficial effects that the regular hexagon combined structure is adopted, the trapezoid bulges and the trapezoid grooves are vertically inserted and matched with the dovetail tenons and the mortises to form freedom degree constraint, so that the device can be stably paved on a foundation; during replacement, the damaged brick body can be taken out only by upwards taking out the damaged brick body.

The utility model discloses an LED display screen with an anti-collision function, which relates to the technical field of electronic display and comprises a base, a rubber pad, an angle adjusting mechanism and an anti-collision mechanism, the rubber pad is fixedly arranged at the bottom of the base, and a supporting seat is fixedly arranged at the top of the base. An angle adjusting mechanism used for adjusting the angle of the display screen is fixedly arranged at the top of the supporting base, and an anti-collision mechanism used for relieving impact force is fixedly arranged at the front end of the angle adjusting mechanism. According to the utility model, the display screen body can directionally slide along the inner wall of the protective bracket through the guide constraint of the dovetail joint and the dovetail mortise. The dampers on the two sides are extruded in the sliding process, self-adaptive deflection is achieved through a hinge structure of the first rotating seat and the second rotating seat, and friction energy consumption is achieved through internal damping materials; the linkage guide rod synchronously triggers the sliding plate to compress the second spring and compress the polyurethane buffer block to form two-stage buffer, so that the LED display screen has the capability of resisting impact force, and electronic elements in the LED display screen are prevented from being damaged due to vibration and extrusion.

The utility model discloses a clamping type edge warping prevention extrusion molding insulation board which comprises an insulation board body and a reinforcing shell arranged on the outer side of the insulation board body in a wrapping mode, a plurality of sets of dovetail tenons are fixedly arranged on one side of the reinforcing shell, and mortise and tenon grooves corresponding to the dovetail tenons are formed in the other side of the reinforcing shell. A clamping assembly used for conveniently enhancing the connecting strength of the heat preservation plate body during clamping is arranged in the reinforcing shell. The clamping assembly comprises a moving column, a telescopic sleeve, a telescopic rod and a limiting module. The reinforcing shell wraps the outer side of the insulation board body to prevent the edge of the insulation board body from being easily warped, so that the insulation boards are prevented from being warped and falling off, the two sets of moving columns are clamped into the corresponding clamping grooves through the guide grooves, the two sets of insulation boards are connected, meanwhile, the two sets of insulation boards are conveniently separated by extruding the two sets of operating rods, and the operation efficiency is improved. And when the operation rod is not pressed, the movable column is clamped into the clamping groove and cannot move out, so that the connection strength between the heat preservation plates is enhanced.

A reusable modular structural member that may replace wooden structures used in concrete forming, transportation, marine, and construction applications. The reusable modular structural member includes a structural profile with first and second sides; a plurality of support beams extending from the first to the second side; at least two fasteners, one at a first end and another at a second end of each of the plurality of ribs; and a groove on a first edge and a tongue on a second edge that are configured to form a dovetail joint that can attach two reusable modular structural members of similar configuration. A reusable modular member can include the modular structural profile and interfacial layers covering the first and second sides. The reusable modular member may be made by extruding the structural profile and molding a plastic polymer to external portions of the structural profile to form the interfacial layers.

The invention discloses an assembly type double-layer cambered-surface metal dot matrix sandwich panel concrete member which comprises a double-layer cambered-surface metal dot matrix sandwich panel and concrete filled in the double-layer cambered-surface metal dot matrix sandwich panel, and dovetail mortises and tenons are manufactured in the middles of the two axial sides of the double-layer cambered-surface metal dot matrix sandwich panel respectively. Mortises and tenons are manufactured in the middles of the upper end face and the lower end face of the double-layer cambered surface metal dot matrix sandwich panel in the circumferential direction respectively, the cambered surface perimeter of the double-layer cambered surface metal dot matrix sandwich panel concrete member is determined according to the fact that a whole circle with the same radius is equally divided into a plurality of parts, and the dovetail mortises and tenons on the side faces of the double-layer cambered surface metal dot matrix sandwich panel concrete member are spliced into a whole cylinder. According to the double-layer cambered surface metal dot matrix sandwich panel concrete member, the structure is simple, on-site welding, steel bar binding and concrete pouring are not needed, staggered joint assembling construction is convenient and fast, installation is rapid and efficient, and the construction efficiency is improved. The connection strength is high, and stress is continuous and reliable.

The utility model discloses a circuit board aluminum alloy cooling fin, including the heat dissipation fin board, the top of heat dissipation fin board is provided with the detachable heat dissipation fin of equidistance arrangement's several, the bottom fixedly connected with heat dissipation fin of heat dissipation fin board installs dovetail, the position of heat dissipation fin board and corresponding dovetail is equipped with dovetail groove matched with dovetail, the utility model discloses a dovetail groove on heat dissipation fin bottom setting dovetail and the cooperation of heat dissipation fin board, has realized the convenient sliding installation and dismounting, has greatly promoted the dismounting convenience, simultaneously, utilizes the cooperation of the clamping assembly on heat dissipation fin board and dovetail groove bottom draw -in slot, through connecting spring drive sliding card bar, ensures the stability of heat dissipation fin installation, in addition, through opening the sealing decoration cover of accommodation groove bottom and pull the connecting slide bar can easily dismount heat dissipation fin, has simplified maintenance process, has improved the maintainability and service life of equipment.

The invention discloses a reinforcing construction method for wood framework dovetail tenon falling. The reinforcing construction method comprises the following steps that firstly, beams with tenon falling and corresponding columns are supported and fixed; 2, cutting the column to form a staggered platform; thirdly, the staggered platform is sleeved with a steel hoop in a hoop mode and fastened through a reinforcing bolt; fourthly, the tenons are sawed off, U-shaped steel grooves are manufactured, and the U-shaped steel grooves and the beams are assembled through opposite-penetrating bolts; and fifthly, two haunched steel plates are welded to the U-shaped steel groove and the steel hoop, and reinforcing construction of wood framework dovetail tenon falling is completed. According to the reinforcing construction method, staggered platforms are formed through cutting, the steel hoops are installed, the U-shaped steel grooves are formed, the beams are fixed and reinforced through the through bolts, and finally the beams are fixedly supported by welding the two triangular haunched steel plates to the U-shaped steel grooves, the bottoms of the U-shaped steel grooves and the side faces of the steel hoops, so that reinforcing construction of wood framework dovetail tenon falling is completed. The reinforcing method is simple, practical, scientific, reasonable and good in bearing performance, and provides technical support for reinforcing treatment of the earthquake damage in the later period.