31results about How to "The connection position is accurate" patented technology

The invention discloses a 300mm vertical oxidation furnace heat preservation barrel, which is characterized by being provided with a bottom quartz plate (1), intermediate quartz sheets (2), supporting rods (3) and a top quartz plate (4); a plurality of supporting rods are vertically and fixedly installed between the bottom quartz plate and the top quartz plates; a plurality of quartz sheets are transversely, uniformly and fixedly installed on the supporting rods at intervals; and the upper surface of the top quartz plate is provided with a fixing groove (4.1) which is used for fixing a quartz boat. The bottom quartz plate and the top quartz plate are in the shape of circular ring; the intermediate quartz sheets are in the shape of circular sheet, and the structure of the intermediate quartz sheets is an OP material layer (2.1) in the middle and a high-purity transparent quartz plate material coating layer (2.2) on the upper layer, lower layer and the periphery. The invention is applicable to the support and heat preservation of the quartz boat of a vertical oxidation furnace, has complete structure, good heat preservation effect and high cleanness, and can ensure the processing quality.

The invention relates to a drilling machine and a pipe mounting and dismounting device thereof. The pipe mounting and dismounting device of the drilling machine comprises a clamp holder, a power unit,a mast, a controller and a displacement sensor, wherein the displacement sensor is used for detecting displacement of the power unit on the mast and feeding the displacement back to the controller; the controller is used for controlling the clamp holder and the power unit to achieve pipe mounting and dismounting operation. Compared with existing manual operation, the pipe mounting and dismountingdevice of the drilling machine facilitates operation by an operator, saves labor and operating cost and improves the working efficiency of the drilling machine.

The invention discloses a mortise and tenon building structure system comprising two or more transverse supporting units and two or more longitudinal supporting units. The transverse supporting units and the longitudinal supporting units are mutually connected in a mortise and tenon mode. Each transverse supporting unit comprises a transverse rod and two transverse connectors fixed to the two ends of the transverse rod. Each longitudinal supporting unit comprises a vertical rod, a connecting sleeve fixed to the bottom end of the vertical rod and more than two columnar longitudinal connectors connected to the vertical rod in a sleeving mode. By means of the mortise and tenon connection mode, the flexibility and construction efficiency of construction of the whole structure system are improved, the structure stability is good, the strength is high, force is scientific and reasonable, and the mortise and tenon building structure system can be used for an internal supporting structure of a house or a temporary building, can further replace a scaffold to be used as an external support, and can be directly used for constructing a bridge.

This invention discloses a kind of insite packing together building mold net, it comprises two steel plate net that face to face, several conjunctions piece link two steel plates net together in a certain partition distance, at the seamy side of the steel plate net, establish the strengthen rib; The connects piece is pole piece in same length, its both side department that has the insert part, with the seamy side slot of the strengthen rib to match each other, the connect part of the piece insert with the slot of strengthen rib to connect together. And the outside side of steel plate net, can substitute for the heat preservation layer, also link the piece to the strengthen rib of outside side steel plate net, the heat preservation layer put together. This building mold net can convenient the spot usage, thereby, enhanced strength of the mold net, be suitable for the demand that semi-high and high floor architecture.

The invention discloses a plastic buckle welding tool for the front decorative plate of the luggage compartment partition of an automobile, which comprises a frame on which a working cavity is arranged; a welding unit and a working table for placing the front decorative plate are arranged in the working cavity; There is at least one unit and the welding unit is located above the worktable; the welding unit includes a clamp for clamping PP plastic parts, a main ironing head, and pushes the clamp to the front decorative plate on the worktable and PP plastic The first pushing device at the joint of the parts and the second pushing device that pushes the main ironing head under the clamp; the clamp is connected to the movable end of the first pushing device; the main ironing head is connected to the movable end of the second pushing device . The front trim board and the PP plastic part are welded by the welding tool, so that the connection between the front trim board and the PP plastic part is more reliable and the connection life of the two is longer.

The invention discloses an exhaust hood capable of achieving convenient oil dirt clearing and wide adjustability. The exhaust hood comprises a supporting plate, a smoke exhaust seat, a power distribution seat, a hanging connection plate, a buckling plate and smoke suction barrels, wherein the supporting plate is horizontally arranged, and the cuboid-shaped smoke exhaust seat is longitudinally arranged above the middle of the supporting plate. The exhaust hood has the beneficial effects that the four smoke suction barrels are matched with the smoke exhaust seat for synchronously sucking oil smoke, and the comprehensive performance of the oil smoke suction of the range hood is improved. Oil dirt in the oil smoke can easily fall into a suction plate at the inner side of a concave through groove, and when the smoke suction barrels rotate for smoke suction, the oil dirt can easily fall into an inwards-concave tank, people can clean the oil dirt conveniently, and it is guaranteed that the oil dirt is not easy to fall onto a kitchen panel to cause sanitation contamination; and working personnel pull a pulling block, and the suction plate can be pulled out of the smoke exhaust seat to clear the oil dirt, or internal components of the smoke exhaust seat can be replaced or maintained, and it is guaranteed that the internal components of the smoke exhaust seat on the exhaust hood are rapid and convenient to mount and dismount.

The invention discloses an inclined tube thickening box ore drawing speed increasing device which comprises a box body, a feeding groove, a discharging mechanism and an ore drawing speed increasing mechanism, fixing supporting legs are fixed to the outer side of the box body, an overflow groove is formed in one side of the upper end of the box body, and an overflow opening is formed in one side ofthe overflow groove; and the feeding groove is formed in the other side of the upper end of the box body, a feeding opening is formed in one side of the feeding groove, and an inclined pipe is connected to the bottom of the overflow groove. Through a leather water pipe and an iron pipe which communicate with each other, the liquidity of water is guaranteed, meanwhile, through the leather water pipe and a movable connecting sleeve which are concentrically distributed, the accuracy of the connecting position between the leather water pipe and the iron pipe can be guaranteed, and therefore the connecting tightness is guaranteed; meanwhile, connecting and dismounting between the leather water pipe and the iron pipe is facilitated through the movable connecting sleeve; and through cooperationof the leather water pipe with the iron pipe, during work, the leather water pipe freely swings in the inclined pipe, the effects of loosening, stirring and washing minerals are achieved, ore drawingis smooth, labor intensity is lowered, and metal loss is reduced.

The invention belongs to the technical field of new energy field station source network load storage, and particularly relates to a source network load storage integrated intelligent switching device. The system comprises a source network load storage base, the source network load storage base is provided with a wind generating set and a photovoltaic transfer machine table, and the photovoltaic transfer machine table is provided with a multidirectional photovoltaic power generation part capable of rotating in the circumferential direction. In the using process, electric energy generated by the wind generating set can be stored in the fixed wind power energy storage part, electric energy generated by the multi-azimuth photovoltaic power generation part can be stored in the movable photovoltaic power storage part, and when photovoltaic power generation cannot be carried out at night, the movable photovoltaic power storage part abuts against the fixed wind power energy storage part, so that the fixed wind power energy storage part and the movable photovoltaic power generation part are separated from each other. According to the invention, a series integrated energy storage structure is formed, all electric energy generated by the wind generating set is stored in the series integrated energy storage structure, intelligent energy storage switching can be carried out in the daytime and at night, the energy storage effect is good, the energy storage upper limit at night is expanded, and the effective utilization rate of energy is high.

The invention relates to a rotating component and a steering gear connecting mechanism. The rotating component comprises a bearing (11) and a locking component (12), wherein the bearing (11) comprisesa rotating outer ring (111), a rotating inner ring (112), and a rolling component (113) located between the rotating outer ring (111) and the rotating inner ring (112); the rotating inner ring (112)comprises a first inner ring portion (1121) and a second inner ring portion (1122); and the locking component (12) is coaxial with the rotating inner ring (112) and is used for locking the first innerring portion (1121) and the second inner ring portion ( 1122). By adopting the rotating component, the rotating inner ring of the rotating component can eliminate the free gap of the mechanism underthe locking action of the locking component, so that when the torque of the steering gear connecting mechanism is transmitted to a rudder shaft end, the torque is not delayed and not lost, and meanwhile, the steering gear connecting mechanism has good later-period maintainability and curing property.

The invention relates to the technical field of detection equipment, and particularly discloses plant extract polysaccharide component content detection equipment. The equipment comprises a base; a kit is movably inserted into the top of the inner wall of a reagent tank, a box cover is movably inserted into the top of the kit, and a first stirring rod is rotatably connected to the bottom of the inner wall of the box cover; a sample suction pipe is movably inserted into the right side of the top of the first supporting frame, a test tube is movably inserted into the top of the second supporting frame, a water storage box is movably inserted into the top of the third supporting frame, and a supporting plate is fixedly connected to the position, close to the right side, of the center of the top of the base; the right side of the sliding block is fixedly connected with a mounting plate, and the top of the mounting plate is fixedly connected with a motor; the bottom of an output shaft of the motor penetrates through the bottom of the mounting plate and is fixedly connected with a second stirring rod. According to the present invention, the extraction amount can be conveniently controlled by the worker so as to avoid the waste of the plant extraction liquid, such that the reagent can be rapidly and completely mixed, and the detection result is accurate.

The invention discloses a tooling for bonding a glass top cover to a luggage rack, which includes a supporting base plate, a luggage rack profiling positioning block, a top cover edge positioning block and a top cover pressing mechanism, and the luggage rack profiling positioning block and the top cover edge positioning block and the top cover pressing mechanism are all arranged on the support base plate, the luggage rack profiling positioning block is provided with a profiling positioning groove for positioning the luggage rack, and the top cover pressing mechanism is provided with There are compression blocks for compressing the glass top cover. It can effectively control the relative assembly position between the glass roof and the luggage rack. Through positioning and pressing, the adhesive can be cured within the specified time to achieve the bonding effect between the luggage rack and the glass roof. The connection position is accurate and the connection is stable and reliable.

The invention relates to a rotating component and a steering gear connecting mechanism. The rotating component comprises a bearing (11) and a locking component (12), wherein the bearing (11) comprisesa rotating outer ring (111), a rotating inner ring (112), and a rolling component (113) located between the rotating outer ring (111) and the rotating inner ring (112); the rotating inner ring (112)comprises a first inner ring portion (1121) and a second inner ring portion (1122); and the locking component (12) is coaxial with the rotating inner ring (112) and is used for locking the first innerring portion (1121) and the second inner ring portion ( 1122). By adopting the rotating component, the rotating inner ring of the rotating component can eliminate the free gap of the mechanism underthe locking action of the locking component, so that when the torque of the steering gear connecting mechanism is transmitted to a rudder shaft end, the torque is not delayed and not lost, and meanwhile, the steering gear connecting mechanism has good later-period maintainability and curing property.

The invention provides a T / R component testing device and a method for checking the safety of the device. The device introduces a single-pole double-throw switch to physically separate the transmitting output channel from the receiving input channel, and an attenuator or a coupler is built into the transmitting In the output channel, this will not affect the noise figure of the receiving channel and the test of the standing wave ratio of the input port due to the large insertion loss of the channel. Compared with the existing test device, the test efficiency is improved, the influence of repeated wiring on the test accuracy and repeatability is reduced, and the number of test accessories such as attenuators or couplers is reduced, and the construction cost of the device is reduced. The integration of the device is facilitated. The safety verification of the T / R component test device before use is to query the connection state of the switch through the switch status register to ensure that the connection position of each switch is correct, and then use the low-power low-frequency excitation signal to verify the connectivity of the device to ensure When the switch fails, the test instrument will not be burned, which improves the safety of the device.

The invention discloses a plastic fastener pressing device, and relates to the field of automation equipment. The plastic fastener pressing device comprises a frame, a first air cylinder, a first sliding mechanism, a second air cylinder and a second sliding mechanism, wherein the first air cylinder is connected with the frame; the first air cylinder is connected with the first sliding mechanism, the first sliding mechanism comprises two middle pressing blocks, the middle pressing blocks are arranged on the two sides of a plastic buckle containing groove respectively, and the first air cylinder can drive the middle pressing blocks to move in the direction close to the plastic buckle containing groove; the second air cylinder is connected with the frame; and the second air cylinder is connected with the second sliding mechanism, the second sliding mechanism comprises two tail pressing blocks, the tail pressing blocks are arranged on the two sides of the opening end of the plastic buckle containing groove, and the second air cylinder can drive the tail pressing blocks to move in the direction close to the plastic buckle containing groove. The first air cylinder and the second air cylinder are adopted to push the pressing blocks to press and connect a plastic fastener and a semi-finished product shell, it is guaranteed that the connection position between the plastic fastener and the semi-finished product shell is correct, the plastic fastener and the semi-finished product are prevented from being crushed, and the product percent of pass is increased.

The invention provides a positioning device before clamped fixing of a pen holder and a pen point. The positioning device comprises an initially-assembled pen conveying mechanism. The conveying direction of the initially-assembled pen conveying mechanism is perpendicular to the length direction of an initially-assembled pen. An initially-assembled pen positioning mechanism is arranged on the conveying path of the initially-assembled pen. The initially-assembled pen positioning mechanism is located beside the initially-assembled pen conveying mechanism and used for limiting the position of a pipe opening of a pen point pipe in the perpendicular direction of the conveying direction of the initially-assembled pen conveying mechanism. Before the initially-assembled pen is conveyed into a clamping hoop pressing device, the position of the pen point pipe is ensured, and in this way, the pressing position of a restrained clamping hoop can be ensured. The initially-assembled pen positioning mechanism in the positioning device is used for limiting the position of the pipe opening of the pen point pipe, namely the position of the pen point pipe in the perpendicular direction of the conveyingdirection of the initially-assembled pen conveying mechanism, that is, the position of the pen point pipe in the length direction of the pen holder is determined, and thus the positioning device successfully determines the position of the pen point pipe.

The invention discloses a flange assembly comprising an upper flange body, a lower flange body, a first boss, a second boss, a first sealing gasket, a second sealing gasket, a waterproof gasket, a third sealing gasket, a first sealing ring, a flange connecting plate and connecting nuts. An annular groove at the lower end of the upper flange body is connected to the second boss at the upper end of the lower flange body through threads, and the second boss of the lower flange body is internally provided with the third sealing gasket and the first sealing ring. According to the flange assembly disclosed by the invention, through threaded connection, the accuracy of the connection position between the upper flange body and the lower flange body is ensured, and the relative position of flanges is prevented from offsetting during installation, so that the installation efficiency and accuracy of the flanges are improved; the connection of the flanges is more secure through the connecting nuts and the flange connecting plate; through the structural design that the third sealing gasket and the first sealing ring are higher than the connection, the airtightness of the connection between the upper flange body and the lower flange body is ensured; and faults, such as errors and leakage, are avoided, and the production safety is ensured.

The invention discloses a four-axle rotary machining fixture. The four-axle rotary machining fixture comprises a base, a four-axle body, a switching disc, a carrying plate and a pressing ring, whereinthe lower surface of the four-axle body is connected with the base; an output end is arranged on the side of the four-axle body; the switching disc is fixedly connected with the output end of the four-axle body; a plurality of limiting posts are arranged at the edge of the carrying plate; limiting holes corresponding to the limiting posts of the carrying plate are formed in the edge of the pressing ring; a plurality of mounting through holes corresponding to T-shaped inserting blocks are formed in the edge of the carrying plate; a groove is inwardly formed between two opposite side surfaces of the base; a continuous bulge is arranged at the middle part of the inner wall of the groove; connection holes corresponding to the groove of the base are formed in two sides of the lower surface ofthe four-axle body; a screw is fixed on the upper surface of the T-shaped sliding block, passes through a connection hole and is fixed on the base through a nut; a plurality of strip-shaped through holes vertical to the direction of the groove are also formed in the base. According to the four-axle rotary machining fixture, pins and pin holes are arranged, so that the positioning accuracy betweenthe workpiece and the carrying plate is ensured, and then the machining accuracy of the workpiece is ensured.

The invention discloses an urban road rainwater collection system, which includes vertical supporting frames, a collection plate, and a water guide plate. The two vertical supporting frames are vertically arranged at the two ends of the urban road rainwater collection system correspondingly, and two horizontal connecting frames are vertically welded to the top of between the two vertical supporting frames at the two ends of the urban road rainwater collection system. The urban road rainwater collection system has the beneficial effects that rainwater on a urban road flows uniformly to a cover plate through a diversion platform, then the rainwater is diverted into a rainwater collecting frame through a top cover, the rainwater collecting frame collects the rainwater into a urban reservoir through a confluence pipe, while drainage pressure of urban rainwater is greatly relieved, the system can collect and divert the rainwater uniformly, and the urban road rainwater collection system is convenient for people to reuse the rainwater; and the rainwater is guided through the multiple diversion pipes at different locations, while the speed of rainwater drainage of the urban road rainwater collection system is greatly improved, it is ensured that the urban road rainwater collection system as a whole can normally collect the rainwater and people can walk through the urban road rainwater collection system and the cover plate normally, and a floor space of the urban road rainwater collection system is reduced.

The invention relates to the technical field of plate splicing. The knotting connecting machine comprises a workbench, a pressing block and a driving mechanism and further comprises a lifting table, the driving mechanism drives the lifting table to move vertically, and the pressing block is fixedly connected with the bottom of the lifting table; the width of the pressing block is gradually reduced from top to bottom, sliding grooves are formed in the two sides of the pressing block, sliding blocks attached to the side wall of the pressing block are slidably connected into the sliding grooves, and first springs are arranged between the sliding blocks and the sliding grooves; an inclined block is arranged on the sliding block in the direction of the lifting table, and the inclined block is in sliding connection with the pressing block and the lifting table; the bottoms of the sliding blocks are located below the bottom of the pressing block, and the bottoms of the two sliding blocks and the bottom of the pressing block form a limiting groove for limiting the steel belt. According to the scheme, the problem that when a steel belt is extruded by an existing pressing block, the steel belt deviates is mainly solved.

A post-shaped element for determining the spatial position of an implant (10), or the opening cross-section of an artificial indentation located in a tooth or in the stroma of a human or animal body, relative to the tissue structures surrounding it, can be introduced with a receiving section (26A) into an adapted receiving recess (10) in the implant (1) or in the artificial indentation, be affixed therein to be torsion resistant and able to again be removed there-from. In a connecting position the post-shaped element protrudes with a cantilever section (26K) beyond the opening cross-section of the receiving recess (10) or artificial indentation. To be able to easily remove the post-shaped element embedded in the impression mass, even in the case of a slanted position of the implant (1) or the longitudinal axis of the artificial indentation in relation to the surrounding tissue structures, it is suggested to ensure that the post-shaped element consists of a bottom portion (24), which can be torsion-resistantly fixated in the receiving recess (10) or the artificial indentation, and a top portion (25), which can be inserted torsion-resistantly in the bottom portion (24) or placed on said portion, wherein the top portion (25), proceeding from the connecting position of the post-shaped element, can be removed in a linear fashion from the bottom portion (24) in various directions.

The invention discloses a disposable sleeve compensator which comprises an outer sleeve connecting pipe, an outer sleeve barrel, an inner sleeve, a reinforcing plate, reinforcing box iron and annularseal rings. One end of the outer sleeve barrel is connected to the outer side of the end part of the outer sleeve connecting pipe in a sleeving manner while the other end of the outer sleeve barrel isconnected to the outer side of the end part of the inner sleeve in a sleeving manner; the reinforcing plate is correspondingly fixed out of a connecting position of the outer sleeve barrel and the inner sleeve; the reinforcing box iron is correspondingly fixed out of a connecting position of the outer sleeve barrel and the outer sleeve connecting pipe; two annular sealing grooves are formed in the outer side of the connecting end of the inner sleeve and the outer sleeve barrel; and the two seal rings are separately arranged in the sealing grooves. By arranging the O-shaped seal ring and the YX type seal ring, a double sealing effect is exerted. The reinforcing plate and the reinforcing box iron are mounted to increase the strength of a welded junction, so that the strength of the disposable sleeve compensator is higher and the sealing effect is better.

The invention discloses a pair of height-adjustable high-heeled shoes. Each high-heeled shoe comprises a shoe body, a heel and a high-heeled assembly detachably connected to the heel, the high-heeledassembly comprises a plurality of high heels of different sizes, locking studs connected into the high heels in a screwed mode and control components used for driving the locking studs to rotate in the high heels. Screw holes matched with one ends of the locking studs are arranged below the heel, a U-shaped cushion part is arranged on the lower portion of the heel, and a clamping part capable of being inserted into the cushion part is arranged at the upper end of the high heel. The heel height of the high-heeled shoes can be adjusted by replacing high heels of different sizes, and a female canconveniently select the proper height according to different occasions.

The invention discloses a chain pin riveting-pressing device capable of increasing chain stability. The chain pin riveting-pressing device comprises a machining table, a press rod body and a limitingplate. A chain shaft lower clamp is welded and connected to the lower portion of the middle position in the machining table. A chain shaft upper clamp is arranged above chain shaft bodies. The front side and the rear side of the chain shaft upper clamp are in sliding connection to the machining table through first convex blocks. Chain piece fixing devices comprise connecting grooves, second convexblocks, preformed holes, first magnets, second magnets and connecting frames. The preformed holes are formed in the rear sides of the connecting grooves at equal distances. The corresponding second magnets are pasted and connected to the front sides of the upper surface and the lower surface of the inner wall of each connecting groove. The upper portions of the connecting frames are connected with tooth blocks. According to the chain pin riveting-pressing device capable of increasing chain stability, the work efficiency is high, and connecting work of multiple sections of chains can be completed at the same time; and the chain shaft bodies, first chain pieces and second chain pieces are fixed stably, the connecting positions are quite correct, and therefore chain stability is increased, and device durability is high.

The invention discloses an automotive anti-overload detecting device which comprises a reinforcing strip board, a connecting positioning groove, an inner shock-absorbing assembly, an overload detecting power source, a detecting assembly and insulating wrapping boards. The connecting positioning groove is formed above the reinforcing strip board; the overload detecting power source is installed atthe outer side of the inner shock-absorbing assembly; and the insulating wrapping boards are installed at the two sides of the detecting assembly. According to the invention, the automotive anti-overload detecting device based on the scientific and reasonable structure is used safely and conveniently. With the reinforcing strip board, the automotive longitudinal arm has the high mechanical strength and good pressure-resistant performance; with the connecting positioning groove, the connection position between the automotive longitudinal arm and the automotive connection assembly becomes accurate; with the inner shock-absorbing assembly, the influence on the detection result of the anti-overload device by the vibration during the automobile driving process is eliminated; because of the overload detecting power source, overload can be detected before starting up of the automobile; because of the detecting assembly, the detection method of the traditional sensor is replaced; and with theinsulating wrapping boards, the interference on the overload detection result by external charged device is eliminated.

The invention provides a wireless charging and communication coil fixed connection assembly of an active implantable medical device, which comprises a frame, wherein the frame comprises a first accommodating groove, a second accommodating groove and a connecting hole; the connecting hole penetrates the frame and is used for penetration of a rigid connecting piece so that the rigid connecting pieceis electrically connected with a hard connecting plate and a coil; the connecting hole is connected with the rigid connecting piece through a positioning structure. The coil fixed connection assemblyis provided with the frame, a hard circuit board and the coil are respectively fixed on the front side and the back side of the frame, and the frame is provided with the connecting hole for penetration of the rigid connecting piece and fixing the rigid connecting piece, so that two ends of the rigid connecting piece can be electrically connected with the hard circuit board and the coil conveniently, thereby avoiding the defect that the hard circuit board and the coil are electrically connected through a flexible connecting piece in the prior art, therefore, the connected hard circuit board and the coil are convenient to disassemble and assemble for a plurality of times, and damage of the whole device can not be caused easily.

The invention discloses a positioning device for a separation assembly support of a fairing and an installation method thereof, and belongs to the technical field of positioning accessories of a fairing. The positioning device of the fairing separation assembly support includes a limit plate and a limit post; the limit plate is connected to the rear end frame of the fairing, and the limit plate can limit the end face position of the rear end frame; the limit post is detachably connected to the limit on the plate; the limit post is connected to the support of the separation assembly, so that the outer surface of the support of the separation assembly is attached to the inner skin of the fairing. The method solves the technical problems in the prior art that manual measurement is used to position the support of the separation component, and the measurement error is large; the work efficiency is low, and the assembly efficiency of the support of the separation component is low. The present invention limits the position of the rear end frame of the fairing through the limit plate, and positions the support of the separation assembly through the limit column on the limit plate, so that the positioning position of the support of the separation assembly is accurate, the positioning efficiency is high, and the separation assembly is improved. Efficiency of assembly between mounts and fairings.

The invention provides a fabricated tunnel structure and a construction method thereof, which can be used for construction of a secondary lining of a newly-built tunnel and repair of an inner sleeve arch of a damaged secondary lining of an existing tunnel, and relates to the field of tunnel construction. The structure comprises a bottom lining, a first arch lining, second arch linings and a third arch lining. The first arch lining, the second arch linings and the third arch lining are all connected with the bottom lining, and the first arch lining is provided with a first matching part. Each second arch lining is provided with a second matching part matched with the first matching part. The third arch lining is provided with a third matching part matched with the second matching part. The method comprises the steps that the first arch lining is connected to the bottom lining; one second arch lining is connected to the bottom lining, and the second matching part is matched with the first matching part; the remaining second arch linings are connected to the bottom lining; and the third arch lining is connected to the bottom lining, and the third matching part is matched with the second matching part. The efficiency and quality of tunnel construction are improved by prefabricating and splicing the lining.

The invention discloses a height-adjustable high-heeled shoe, which comprises a shoe body, a heel and a high-heeled assembly detachably connected to the heel. The locking studs inside and the control parts used to drive the locking studs to rotate in the high heel, the bottom of the heel is provided with a screw hole that is screwed and matched with one end of the locking stud, and the bottom of the heel is provided There is a pad, the pad is "U"-shaped, and the upper end of the high heel is provided with a snap-fit ​​part that can be inserted into the pad. The invention can make the height of the heel of the high-heeled shoes adjustable by changing the high-heeled shoes of different sizes, which is convenient for women to choose a suitable height for different occasions.

The invention discloses a stage flight case. A case body and a case cover are included. A case side frame is arranged on the opening edge of the case body. A cover side frame is arranged on the opening edge of the case cover and connected with the case side frame. The cross section of the case side frame comprises a case side connecting part and a first butt joint part, and a first flange inwardsextending is arranged at the middle portion of the case side connecting part. A clamp groove is formed between the first flange and the first butt joint part. The cross section of the cover side framecomprises a cover side connecting part and a second butt joint part. A support is clamped in the clamp groove and comprises a support body and a bracket inwards bending and extending from one end ofthe support body. By utilization of the structure, connection of the case side frame and the case body is reliable and firm, connection of the case side frame and the case cover is reliable and firm,the size of the integral stage flight case becomes small, the space utilization rate is reduced, the transportation cost is reduced, and support connection is reliable and convenient.