47results about How to "Solve the gap problem" patented technology

A high-frequency reciprocating rotating electric toothbrush rod can work in a wide frequency range of 140-350 Hz and high swing frequency and comprises a brush rod shell, an inner support, a rotating brush head assembly and a rotating power transmission assembly, the brush rod shell is hollow, the rear end of the brush rod shell is detachably connected to a main machine of an electric toothbrush, the rear portion of the brush rod shell is in a trumpet shape, and the inner support is contained in the brush rod shell. The inner support is in a horn shape and matched with an inner cavity of the brush rod shell, the inner support is hollow so as to form an inner space with a built-in rotary power transmission assembly, and a round groove for containing the rotary brush head assembly is formed in the front end of the brush rod shell. Therefore, gaps after abrasion can be effectively compensated, the problems of the service life and noise under the high rotating speed are solved, the dynamic coupling requirement is met, the problems caused by the gaps are also solved, the effect of absorbing noise generated by mutual collision in the component movement process is good, and the low-noise operation is kept.

The utility model discloses an air conditioner filter screen self-cleaning mechanism, and particularly relates to the technical field of air conditioner filter screen cleaning, the air conditioner filter screen self-cleaning mechanism comprises an air conditioner body, a filter screen is installed on the air conditioner body, and a filter screen brush matched with the filter screen is installed in the air conditioner body; the telescopic assembly is used for enabling the filter screen brush to make stable contact with the filter screen, the telescopic assembly comprises a stabilizing column installed in the air conditioner body and a connecting column arranged in the filter screen brush in a sleeved mode, and one end of the connecting column is movably connected with an adjusting column; through the arrangement of the telescopic assembly, stable contact between the filter screen brush and the filter screen can be achieved, so that the problem that a gap exists between the deformed filter screen and the filter screen brush due to the fact that an existing filter screen is prone to deformation and looseness after being used for a long time is solved, the filter screen brush can stably clean the filter screen, and the cleaning efficiency is improved. And therefore, the cleaning effect of the filter screen is effectively improved, and the practicability of the cleaning mechanism is greatly improved.

The utility model belongs to the technical field of wire stripping pliers, and particularly relates to an electric heating type charging wire stripping pliers. The electric heating type charging wire stripper comprises a wire stripper body, a wire stripping mechanism and a heating mechanism. The wire stripper body comprises a first plier head, a second plier head, a first plier handle and a second plier handle, wherein the first plier handle and the second plier handle are arranged at the lower ends of the first plier head and the second plier head respectively. The wire stripping mechanism comprises two wire stripping knife edges, two mounting grooves and connecting assemblies arranged between the mounting grooves and the wire stripping knife edges; the heating mechanism comprises two heating bodies, a control assembly and a power supply assembly matched with the control assembly. An operator can adjust the temperature of the heating body through the cooperation of the control assembly and the power supply assembly according to the requirements of materials and thicknesses of external insulating layers of different to-be-stripped wires, so that the temperature of the wire stripping knife edge is accurately adjusted to adapt to different temperature requirements, softening of the external insulating layers of the wires is facilitated, and the service life of the wire stripping knife edge is prolonged. The damage risk of the wire in the wire stripping process is reduced, and the stripping quality and reliability of the wire are improved.

The invention relates to the technical field of gas meters, in particular to an ultrasonic gas meter which comprises a shell, an ultrasonic pipe, an ultrasonic receiver, a reading module, a gas outlet pipe and a gas inlet pipe. The shell is installed on a wall, the ultrasonic pipe is transversely installed in the shell, the ultrasonic receivers are symmetrically installed on the two sides of the ultrasonic pipe, the reading module is installed at the front end of the shell, and the air outlet pipe and the air inlet pipe are symmetrically installed on the two sides of the top of the shell. The transmission mechanism and the adjusting mechanism are both installed on the inner wall of the upper cavity of the shell, and the transmission mechanism is connected with the adjusting mechanism through a clamping ring. The transmission mechanism drives the half gear to rotate through the motor, the half gear can drive the eccentric gear to rotate, due to the fact that the number of teeth of the half gear is half of that of the eccentric gear, the half gear rotates one circle to drive the eccentric gear to rotate a half circle, and the adjusting mechanism is opened to adjust the gas flow speed after the eccentric gear rotates a half circle.

This utility model relates to the field of machining center technology, specifically a quick-change tool chuck for CNC machining centers. It includes a spindle motor and a cutting tool. The spindle motor is mounted on the top of the spindle housing, and a Z-axis motor is fixedly connected to the back of the spindle housing. A motor is mounted on the top of the Z-axis motor, and a guide rail is mounted on the back of the Z-axis motor. The guide rail is mounted on the front of the column. This utility model significantly reduces tool runout and improves radial runout accuracy. The tapered hole design around the spindle port simplifies the mechanical structure and achieves synchronous positioning of the end face and the tapered surface, avoiding the gap problem of traditional tapers and reducing manufacturing costs. The built-in spring and pull stud assembly of the chuck can be disassembled separately, reducing maintenance costs. It overcomes the limitations of traditional chucks in terms of quick tool change, accuracy maintenance, and cost control, providing a better solution for efficient and precise machining in CNC machining centers.

The utility model discloses a nut fixing structure and a quick-action switch, the nut fixing structure comprises a nut and a connecting body, the connecting body is provided with a mounting cavity and a through hole communicated with the mounting cavity, the mounting cavity is provided with an opening, the opening is provided with an elastic limiting structure, and the elastic limiting structure is provided with a through hole communicated with the through hole. The nut enters the mounting cavity from the opening and extrudes the elastic limiting structure, and the elastic limiting structure is elastically reset after the nut reaches a set position of the mounting cavity and limits the nut to retreat from the opening; a fastener matched with the nut can penetrate through the through hole, and the axis of the through hole and the axis of the nut located at the set position of the mounting cavity are located on the same straight line. When the nut fixing structure is applied to the quick-acting switch, the problems of gaps and scrapping of the shell can be solved.

The invention discloses a vehicle-mounted charger and an assembling method, the vehicle-mounted charger comprises an integrated closed shell, the integrated closed shell comprises a main body part and an end part which are used for accommodating components, and a circuit board component which comprises at least one main circuit board and at least one auxiliary circuit board, the auxiliary circuit board and the main circuit board are configured to be capable of being inserted into the integrated closed shell in sequence, and the auxiliary circuit board and the main circuit board are spliced and electrically connected; during installation, the auxiliary circuit board is firstly installed in the integrated closed shell and positioned, and then the main circuit board is installed in the integrated closed shell and installed with the auxiliary circuit board in a butt joint mode. The integrated closed shell is adopted, and the structural design and the installation process of the circuit board are optimized, so that sequential installation and reliable electric connection of the auxiliary circuit board and the main circuit board can be smoothly realized in a limited internal space, and the waterproofness and the overall strength are improved on the premise of ensuring the product performance.

The present invention relates to a vehicle window glass guide rail structure, a vehicle door and a car. The vehicle window glass guide rail structure comprises a guide rail, which is located between the vehicle window glass and the vehicle door sheet metal, the moving direction of the vehicle window glass is a first direction, the guide rail can be fixed on the vehicle door sheet metal along the first direction, a side of the guide rail close to the vehicle door exterior panel extends to a side close to the vehicle door exterior panel to form a first connecting portion, the first connecting portion can extend between the vehicle door sheet metal and the vehicle door exterior panel, a first lip edge and a second lip edge are provided on the side of the guide rail facing the vehicle window glass, the first lip edge can abut against the side of the vehicle window glass facing the vehicle door sheet metal, and the second lip edge can abut against the side of the vehicle window glass facing the vehicle door exterior panel. The outer surface of the vehicle window glass is flush with the outer surface of the vehicle door exterior panel, and the gap between the vehicle window glass and the vehicle door sheet metal is effectively sealed, so as to effectively solve the problem of wind noise caused by the surface difference between the vehicle window glass and the vehicle door exterior panel.

The utility model relates to the technical field of zippers, in particular to a seamless connection dense tail zipper which comprises a first zipper tape, a second zipper tape is arranged on one side of the first zipper tape, a zipper assembly is arranged between the first zipper tape and the second zipper tape, and the zipper assembly comprises a zipper head and a zipper pull. The zipper tooth belt is installed on the inner side of the first zipper belt and the inner side of the second zipper belt, the two pieces of waterproof cloth are arranged on the surface of the zipper tooth belt, the two pieces of waterproof cloth cover the surface of the zipper tooth belt, fixing is conducted through the zipper assembly, the waterproof performance of the zipper is enhanced, and the waterproof performance of the zipper is improved. The contact between the zipper tooth belts and the external environment is further reduced, the sealing performance is improved, the zipper assembly is in sliding connection with the two zipper belts through the limiting grooves, the stability and accuracy of the zipper assembly in the sliding process can be ensured, and the gap problem caused by deviation or shaking of the zipper head is avoided.

The application provides a connecting lock mechanism of an LED display device and the LED display device, wherein the connecting lock mechanism of the LED display device comprises a connecting lock, the connecting lock comprises a base, a lock body, a core body part has an insertion position of making a lock pin protrude from the base, a locking position of rotating a preset angle relative to the insertion position and a tension position of retracting a preset distance relative to the insertion position, a first driving piece, a transmission piece and a second driving piece movably arranged on the core body part, the second driving piece drives the first driving piece to rotate, on one hand, drives the transmission piece to rotate to drive the core body part to rotate from the insertion position to the locking position, on the other hand, drives the core body part to move from the insertion position to the tension position through the push-up structure and the push-up cooperation with the base, and when the core body part rotates to the locking position, the transmission piece is switched from being driven by the first driving piece to being static. The technical scheme of the application effectively solves the problem of obvious gaps between two adjacent LED boxes in the related art.

The present invention provides a vertebral plate assembly with an elastically adjustable filling block structure, comprising: a connecting piece, the connecting piece comprising a first connecting portion, an intermediate connecting portion and a second connecting portion, the intermediate connecting portion being located between the first connecting portion and the second connecting portion; a filling block, the connecting piece being connected to the filling block, the filling block having an elastic structure that allows the filling block to be extended. The technical solution of the present invention effectively solves the problem of gaps between the filling block and the vertebral plate and between the filling block and the side block in the vertebral plate assembly in the prior art.

The utility model relates to a screw jack device for large -scale work piece support leveling, including support frame, screw rod, hand wheel, bracket and bolt, support frame whole presents the trapezoidal structure of little up big, is equipped with the mounting hole on the support frame, is equipped with the stop hole on the upper portion of mounting hole, hand wheel is installed in the stop hole, and can rotate relative to support frame, screw rod lower part passes in hand wheel and mounting hole in proper order, and is fixedly connected through trapezoidal thread and hand wheel screw thread cooperation, upper portion passes through bolt and bracket fixed connection, the utility model discloses through support frame adopts the trapezoidal structure of little up big, greatly enhanced the overall rigidity, effectively reduced the risk of falling when supporting large -scale work piece, provides the stable support foundation for large -scale work piece, guarantees the security of operation process, simultaneously through the trapezoidal thread cooperation of hand wheel and screw rod, single person can easily realize the lifting operation of screw rod, need not many people cooperation, significantly improves the operation efficiency, can satisfy the demand of large -scale work piece support leveling fast.

The utility model provides a cladding skeleton rib position adding structure which comprises a first shell, the first shell is connected with a second shell through a binding groove, the second shell is of a U-shaped structure, a transverse L-shaped notch is formed in the top face of the U-shaped structure, the included angle of the L-shaped notch is an obtuse angle, and the first shell and the binding groove are located on the L-shaped notch; a straight plate on one side of the U-shaped structure is an arc surface of a triangular structure; the first shell is of a 7-shaped structure, dozens of rib position structures are arranged on a bottom plate in an opening of the U-shaped structure, and electronic modules are installed on the dozens of rib position structures; a first rounded rectangular hole is formed in the transverse plate of the 7-shaped structure, and a second rounded rectangular hole is formed in the bottom plate of the U-shaped structure. According to the utility model, the U-shaped structure of the second shell and the 7-shaped structure of the first shell are adopted, and dozens of rib position structures on the bottom plate of the U-shaped structure are in contact with the electronic module, so that the problem of installation gaps of the electronic module is solved, the stability is improved, and the noise caused by shaking is reduced.

The utility model relates to the technical field of battery module accessories, and particularly discloses a battery module protection device which comprises a protection armor plate arranged at the bottom of an automobile body, and the protection armor plate comprises a battery protection plate and a motor protection plate detachably connected with the battery protection plate. The motor protection plate is detachably connected with the bottom of the automobile body; a containing groove is fixedly connected to the side, close to the automobile body, of the battery protection plate, contact sponge is fixedly connected to the inner wall of the containing groove, a protection sponge set is arranged on the side, close to the battery module, of the bottom of the containing groove, and the containing groove is detachably connected with the side wall of the automobile body. The device solves the problem of abnormal sound of a traditional battery module protection device.

The utility model provides an elevator entrance structure suitable for an Agv trolley operation environment. The problem that an AGV trolley cannot pass through a large gap between a floor panel and an elevator car in the operation process is solved. The device comprises a landing door floor slab and an extension mechanism, and the extension mechanism is arranged on the landing door floor slab and comprises a control module, a motor, an extension plate, a transmission lead screw, a movable tongue plate, a mounting seat, a lead screw nut and a cover plate; the mounting seat is mounted on a floor of a landing door; the cover plate is mounted at the top of the mounting seat; the motor is fixedly mounted in the mounting seat; the control module is connected with the motor; the transmission screw rod is rotationally mounted in the mounting seat and is connected with the motor; the lead screw nut is installed on the transmission lead screw. The movable tongue plate is fixedly connected with the lead screw nut and is mounted on the mounting seat in a sliding manner; the extension plate is slidably mounted on the cover plate and connected with the movable tongue plate.

The utility model relates to the field of automobile door panels, in particular to a handle box and a door panel structure, the handle box comprises a box main body, and one end, close to a switch panel, of the box main body is provided with a support lug used for being connected with other parts; the door plate comprises a handrail and the handle box, and the supporting lugs of the handle box are detachably connected with the handrail. According to the scheme, the connection strength between the handrail and the handle box can be enhanced, so that the handrail is stabilized, in the prior art, the handle box and the switch panel are connected and can be kept relatively fixed, therefore, the relative fixation between the handrail and the switch panel can be kept, and the problem that a gap is generated between the handrail and the switch panel is solved.

The present application discloses a modeling method and device for a three-dimensional pipeline, including: constructing a topological network of detection points according to the connection relationship between the detection points and the node type of the detection points; traversing each edge in the topological network to create an initial cylinder for each segment of the pipeline; refining the initial cylinder into quadrilateral patches, assigning four vertices to each quadrilateral patch to form a continuous quadrilateral mesh, and rendering the generated quadrilateral mesh as a three-dimensional image; modeling the target pipeline according to the three-dimensional image in two cases; when the target pipeline is a two-way node, executing the first modeling step; when the target pipeline is a multi-way node, executing the second modeling step; the first modeling step includes: defining five control points, calculating any point on the smooth transition curve according to the curve formula, and constructing a pipeline model of the two-way node according to the smooth transition curve. The problem of gaps appearing at the connection of cylindrical pipelines constructed segment by segment in the prior art is solved.

The utility model discloses a wire harness assembly with a reinforcing structure, relates to the technical field of wire harness installation, and aims to solve the technical problems that the diameter between a current wire pipe and a wall hole has deviation and the installation is unstable, the wire harness assembly comprises a reinforcing pipe fitting sleeved on the outer side of a wire harness, and an expansion piece is movably installed outside the reinforcing pipe fitting. The reinforcing pipe fitting comprises a fixing pipe, external threads are arranged on the outer wall of the fixing pipe, the wire harness can be wrapped in the reinforcing pipe fitting structure, protection of the outer skin of the wire harness is improved, the expansion part is combined with the fixing pipe fitting in a threaded connection mode, the movable connection effect can be achieved, and the fixing pipe fitting is convenient to use. In this way, the position between the extrusion sleeve and the expansion piece can be conveniently adjusted during rotation, the strip-shaped groove of the supporting pipe can be extruded through the extrusion block to be opened, and therefore the diameter of the supporting pipe can be increased. The structure has the advantages that the diameter of the reinforcing structure can be finely adjusted, and the stability of the mounting position is improved.

The utility model belongs to the technical field of large-scale wind driven generator stator core lamination, and particularly relates to a large-scale wind driven generator stator core lamination device which comprises a stator supporting seat, a lower pressing plate is arranged at the top of the stator supporting seat, an upper pressing plate is arranged at the top of the lower pressing plate, and the upper pressing plate is arranged at the bottom of the stator supporting seat. A stator core is arranged between the lower pressing plate and the upper pressing plate. According to the utility model, the eight mechanical jacks are uniformly arranged, then the lower pressing plate of the large-scale pre-pressing tool is hung on the jacks, each jack is adjusted, then the stator iron cores are stacked on the lower pressing plate, when the stator iron cores are stacked to a fixed height, the groove type of the stator iron cores is adjusted, then the upper pressing plate of the large-scale pre-pressing tool is hung, and after the hanging is completed, the stator iron cores are placed on the lower pressing plate. The two ends of the inner ring screw rod and the two ends of the outer ring screw rod penetrate through the lower pressing plate and the upper pressing plate to be connected with the nuts, and therefore the problem that tiny inter-piece gaps are possibly generated after scattered pieces are installed can be solved through the structure, and the iron core length requirement and the iron core overlying coefficient are guaranteed.

The utility model relates to line lamp technical field discloses a line lamp splicing anti -misplacement guide groove, including the casing, and the casing is the long strip structure of first and last splicing along the length direction. One end part outer wall of casing is equipped with the locating block, and the other end part inner wall is equipped with the locating groove with the shape matching of locating block. The locating block and the locating groove slide fit, and the transverse and longitudinal displacement of two casings at the splicing place is limited, realizes the preliminary anti -misplacement fixed. Meanwhile, the butt -joint end part outer surface connected with two casings is fixedly connected through the bonding plate, and the bonding plate is bridged on the outer surface of two casings along the length direction of casing, and the secondary reinforcement is carried out to the connection. The utility model realizes accurate anti -misplacement through the locating block and the locating groove, and then carries out secondary reinforcement through the bonding plate, effectively improves the accuracy, structural stability and installation convenience of line lamp splicing, and ensures the straightness and the beauty of line lamp guide groove.

The utility model discloses a corner type wainscot mounting structure which comprises a corner wainscot, connecting notches and an upper wall connecting piece, the corner wainscot comprises a corner profile, two splicing profiles and a plate, the connecting notches are respectively arranged on the inner side faces of the corner profile and the two splicing profiles, one end of the upper wall connecting piece is used for being connected to a wall, and the other end of the upper wall connecting piece is used for being connected to the wall. And the other end of the upper wall piece is connected into the connecting notch. Compared with the prior art, the corner sectional material is of an integrated structure, the splicing sectional materials spliced to the two side end faces of the corner sectional material are connected to form the corner structure, the plate is fixed to the outer side faces of the corner sectional material and the two splicing sectional materials in an adhesive mode before leaving a factory, corner splicing does not need to be conducted on an installation site, and the problem of gaps at corners is solved; and the inner side faces of the corner sectional material and the splicing sectional material are provided with the connecting notches used for being connected with the upper wall piece, one end of the upper wall piece is fixedly connected with the wall body, the other end of the upper wall piece is connected with the connecting notches, then upper wall installation of the corner wall protection plate can be completed, and installation is convenient and fast.

The present invention relates to a vehicle window glass guide rail structure, a vehicle door and a vehicle. The vehicle window glass guide rail structure comprises a guide rail, the guide rail is located between the vehicle window glass and the vehicle door sheet metal, the guide rail can be fixed on the vehicle door sheet metal along a first direction, a first connecting portion is provided on a side edge of the guide rail close to the side panel trim, the first connecting portion is located between the vehicle window glass and the side panel trim, a first lip is provided on the side of the guide rail facing the vehicle window glass, the first lip can abut against the side of the vehicle window glass facing the vehicle door sheet metal, a second lip is provided on the side of the first connecting portion facing the vehicle window glass, the second lip can abut against the side of the vehicle window glass facing the side panel trim, a third lip is provided on the side of the first connecting portion facing the side panel trim, the third lip can abut against the side of the side panel trim close to the vehicle door sheet metal. The side of the vehicle window glass away from the vehicle door sheet metal is arranged flush with the side of the side panel trim away from the side panel trim, thereby eliminating wind noise caused by surface difference during high-speed driving of the vehicle.

The utility model belongs to the technical field of metallurgical submerged arc furnace equipment, and particularly relates to a smoke sealing device for a submerged arc furnace. Comprising a first positioning ring and second positioning rings, the first positioning ring is fixed to an electrode preformed hole in the top of a holding system or a smoke hood, the second positioning rings are fixed to the bottom of the first positioning ring and are divided into a plurality of parts, and an insulation sealing gasket is arranged at the joint of every two adjacent second positioning rings; a puller bolt is arranged on the second positioning ring, the puller bolt penetrates through the second positioning ring, a baffle is arranged at one end, extending into the second positioning ring, of the puller bolt, and an annular insulating block is arranged on the baffle; the baffles are divided into a primary baffle and a secondary baffle, guide grooves are symmetrically formed in the left side and the right side of the primary baffle, guide bosses are symmetrically arranged on the left side and the right side of the secondary baffle, the guide bosses are inserted into the guide grooves, and annular insulating blocks are arranged on the inner sides of the guide grooves and the inner sides of the guide bosses. The smoke sealing device for the submerged arc furnace is good in sealing performance.

The invention discloses a hole plugging device and a using method thereof, and relates to the technical field of constructional engineering. The hole plugging device comprises a slurry storage pipe and a lower blocking piece device, a pushing device is arranged at the top of the slurry storage pipe and comprises a pushing piece and a pushing rod, the lower blocking piece device is arranged at the bottom of the slurry storage pipe, an elastic device is arranged on the lower blocking piece device, and an upper blocking piece device is arranged on the elastic device. According to the hole plugging device and the using method thereof, compared with traditional construction processes such as plugging directly through mortar, the hole plugging quality can be fully guaranteed, one-time forming and one-time optimization are achieved, the construction efficiency is improved, and the secondary maintenance time and cost are saved; therefore, the problem of gaps caused by final setting and shrinkage of the slurry is solved. The device is manufactured according to the depth and shape, and can be used in holes under any condition.

The present invention provides an indoor unit and an air conditioner having the same, wherein the indoor unit comprises: a shell, a panel body, a panel, a large air guide plate and a small air guide plate; the shell is connected to the panel body, and the panel body has an air outlet; the panel is connected to the panel body; the small air guide plate is connected to at least one of the shell, the panel body and the panel, the small air guide plate is arranged adjacent to the large air guide plate, the small air guide plate has a second open position and a second closed position, when the small air guide plate is in the second closed position and the large air guide plate is in the first closed position, the small air guide plate and the large air guide plate close the air outlet, and the end of the large air guide plate close to one end of the small air guide plate is located outside the small air guide plate, when the large air guide plate is in the first open position, a first air duct structure is formed between the inner surface of the large air guide plate and part of the outer surface of the panel. Such an arrangement can achieve seamless cooperation between the large air guide plate and the small air guide plate, and can control the cold air backflow, and prevent the problem of condensation on the small air guide plate.

The utility model discloses a battery equalization module with expansion ports, and relates to the field of battery equalization modules, the battery equalization module with expansion ports comprises two symmetrically arranged intermediate shells, a left end cover and a right end cover, and the two intermediate shells, the left end cover and the right end cover are detachably connected with each other; according to the battery equalization module with the expansion ports, the first grooves and the second grooves are formed in the end parts of the inner and outer walls of the intermediate shell, and the effect of adjusting the length of the shell by breaking off with hands is achieved by weakening the strength of the grooves. The notch is kept straight through the design of the groove position, the complete sealing performance of the shell can be maintained after the groove position is matched with the end cover, the problem of interface gaps caused by traditional cutting is effectively avoided, and the convenience of length adjustment and the structural reliability of the shell are remarkably improved.

The utility model relates to a tool holder technical field discloses a kind of stable tool holder, including two clamping claws, center positioning block and spring, two described clamping claws are left-right symmetrical and each other can open or close and install on tool disc, the center positioning block is fixed on the edge surface of tool disc and is located between two clamping claws, the spring is connected between the rear end of two clamping claws and is located in the rear side of center positioning block, the inside of two described clamping claws is provided with the clamping block for clamping handle, detachably mounted on the center positioning block is handle positioning block.The utility model can realize quick replacement different specifications handle positioning block (such as NBT30 / BT30 module) by the detachable design of handle positioning block, realize double handle standard compatibility, avoid the gap problem of traditional conversion sleeve, directly utilize the precision machining surface of positioning block and handle cooperation, improve clamping rigidity;And modular design reduces maintenance cost, handle positioning block can be replaced individually after wearing, without overall scrapping tool holder.

This invention provides a centrifugal pump sealing structure and a centrifugal pump, including a sealing ring mounted on a pump shaft and a support ring mounted inside the pump body. The sealing ring is concentrically arranged inside the support ring. The invention is characterized by a sealing assembly disposed between the support ring and the sealing ring. The sealing assembly includes: a plugging member with horizontally symmetrical sides extending into the interior of both the support ring and the sealing ring, and vertically symmetrical sides deformed and extending into the gap between the support ring and the sealing ring; and an adjusting member disposed between the sealing ring and the plugging member, which compresses the plugging member. This invention, through its designed sealing assembly, achieves a double seal, avoiding gap problems caused by wear between the sealing ring and the pump shaft.

The utility model discloses an aluminum-wood combined fabricated building cornice which comprises a building body, a cornice plate assembly and a connecting assembly. The connecting assembly comprises a first connecting piece, a fourth connecting piece and a second connecting piece; the cornice board assembly comprises an upper cornice board, a lower cornice board and a ceiling board; a first groove is formed in one end, close to the upper cornice board, of the lower cornice board; one end of the suspended ceiling plate is detachably connected with the lower cornice plate; a lamp strip is arranged in the first groove; the upper cornice board is made of aluminum so as to effectively shield rainwater; the first groove formed by bending the lower portion of the upper cornice board can effectively hide and brighten the lamp belt and the wire pipe, the opening of the first groove is downward, rainwater can be prevented, and the service life of the lamp belt is prolonged. The suspended ceiling plate is connected with the building through the expansion bolt suspender, the length of the expansion bolt suspender can be conveniently adjusted according to the actual size, and the problem of unattractiveness caused by civil engineering construction errors at the cornice can be effectively solved.