68results about How to "Increase insertion efficiency" patented technology

The invention relates to the technical field of condenser production, and provides condenser automatic U-pipe inserting equipment which comprises a large bottom plate, a U-pipe feeding part, a U-pipe transition shaping part, a U-pipe separation part after shaping, a manipulator, a condenser incoming material production line and the like. The bottom surface of the large bottom plate is fixedly connected with a case; one side of the upper surface of the large bottom plate is fixedly connected with a U-shaped pipe feeding part; a U-shaped pipe transition shaping part fixed on the surface of the large bottom plate is arranged on the right side of the U-shaped pipe feeding part; the rear side of the U-shaped pipe transition shaping part is provided with a U-shaped pipe post-shaping separation part fixed on the surface of the large bottom plate; a condenser incoming material production line placed on the ground is arranged on the rear side of the case; according to the automatic U-pipe inserting machine, U-pipes are automatically fed through the vibration disc, the shapes of the U-pipes are shaped, the U-pipes are automatically inserted into the condenser through the mechanical arm, the inserting efficiency can be greatly improved, the production cost can be reduced, and meanwhile the stability of the inserting quality of the U-pipes can be guaranteed.

The utility model discloses a test tube storage device for animal husbandry veterinary sampling, belongs to the technical field of animal husbandry sample collection and storage devices, and aims to solve the problems that an existing storage device for animal blood sample collection in a pasturing area is relatively tedious in use process, consumes more time, increases the residence time of sampling workers in the pasturing area, and is inconvenient to use. The test tube storage device comprises a shell and a top cover, a plurality of test tube storage blocks are sequentially arranged in the shell in the length extension direction of the shell at equal intervals, and a plurality of opening and closing units are sequentially arranged on the lower surface of the top cover in the length extension direction of the top cover at equal intervals; each opening and closing unit corresponds to one test tube storage block, each opening and closing unit is correspondingly connected with one control unit, the execution end of each control unit is fixedly connected with one opening and closing unit, and the control end of each control unit extends to the upper part of the top cover and is movably connected with the top cover. The device is mainly used for storing blood samples collected by animals in a pasturing area in time.

The utility model relates to the field of optical cable distribution boxes, in particular to an optical cable distribution box capable of being quickly positioned and installed. Technical problems are that a conventional optical cable distribution box is generally complex in structure, redundant optical fiber wires are not easy to store in a targeted manner, wire harnesses are easy to be disordered, and the installation speed is affected. Comprising a box body, a plug-in assembly, a limiting assembly, a first fixing assembly, a second fixing assembly, a first winding assembly, a second winding assembly and a mounting plate, by arranging the plug-in assembly, the limiting assembly, the first fixing assembly, the second fixing assembly, the first winding assembly and the third winding assembly which are arranged in a partitioned mode and used for conducting classified plug-in and winding storage on optical cables, targeted plug-in and fixation can be conducted on different optical cable fiber distribution lines, and the limiting assembly can be used for leading in an optical cable bus; the first fixing assembly and the second fixing assembly can be used for being matched with the first winding assembly and the second winding assembly respectively to fix the fiber splitting wire harness.

The invention relates to the technical field of wire body plugging, in particular to plugging equipment and a plugging method.The plugging equipment is provided with a rack, a plugging unit, a wire cutting unit, a wire body clamping unit and a wire inserting unit, the plugging unit is fixed to the rack and provided with a plugging cavity, a needle sleeve can be fixed to the plugging cavity, the wire cutting unit is located on one side of the plugging unit, and the wire cutting unit is located on the other side of the plugging unit; the cutting unit is arranged on one side of the inserting unit, an insulating skin of the inserting end, to be inserted into the needle sleeve, of the wire body can be cut off in the inserting process, stripping of the insulating skin is facilitated, the wire body clamping unit is located on the side, close to the wire cutting unit, of the inserting unit and can clamp the wire body, and the wire inserting unit is arranged on the other side of the inserting unit and can pull out the wire body after inserting of the wire body is completed; through the arrangement of the structure, the automatic plugging of the wire body can be realized, the manpower required by the plugging of the wire body is effectively reduced, and the plugging efficiency of the wire body is improved, so that the plugging process requirement of the wire body is met.

The utility model discloses a plug-in assembly and an endoscope system, and relates to the technical field of medical instruments. The plug-in assembly comprises a connector and an interface, the connector is arranged on one of the far end of the switching cable of the handle and the shell of the all-in-one machine equipment, the interface is arranged on the other one of the far end of the switching cable and the shell, the connector comprises a first shell and a first terminal module, the interface comprises a second shell and a second terminal module, the connector has at least two types, and the first terminal module is connected with the second terminal module. The interface has at least two types, the at least two types of joints have at least two types of first identification parts, the first identification parts are arranged on the first shell, the at least two types of interfaces have at least two types of second identification parts, the second identification parts are arranged on the shell, and the types of the second identification parts are matched with the types of the first identification parts. And when the joint and the interface are mutually inserted and circumferentially aligned, the first identification part is positioned at a position aligned with the second identification part. According to the plug-in assembly, joints and interfaces of different models are easy to identify, and the plugging efficiency can be improved.

This invention discloses a tooling mold for manufacturing brake discs and a method for manufacturing brake discs. The tooling mold includes an insertion section whose shape matches the shape of the heat dissipation holes and achieves an interference fit after insertion. The end of the insertion section is fixedly connected to a sliding groove via a connecting rod. A sliding plate, which cooperates with the sliding groove, enables position adjustment of the insertion section. This invention offers flexible overall adjustment and can be used for combined adjustment of the spacing for brake discs of different sizes, facilitating operator operation. The method of manufacturing brake discs using this invention reduces the difficulty of drilling holes in carbon-carbon composite brake disc preforms, reducing processing volume; it reduces the time and material consumption required for brake disc vapor deposition; it improves the smoothness of the inner surface of the heat dissipation holes, reducing processing volume and avoiding dynamic imbalance and airflow velocity uniformity issues caused by rough holes; it promotes uniform product material, ensures uniform expansion coefficient, and reduces the probability of product cracking.

The present invention relates to the field of polypropylene, and discloses a long-chain branched polypropylene and a preparation method thereof. The long-chain branched polypropylene resin has a structure shown in the following formula (I), and the molar percentage of Si atoms in the long-chain branched polypropylene resin is 0.0001‰-1.25‰, wherein k is an integer of 0-18, m is an integer of 250-25000, n is between 1-5, x is an integer greater than 1, and R is a linear, branched or isomerized alkyl group having a carbon number of 1-20. The long-chain branched polypropylene resin of the present invention has the effects of high comonomer insertion efficiency, clear polymer structure, and uniform distribution of long-chain branched structures in the polymer chain.

The invention provides a multi-channel SMP plugging device. The multi-channel SMP plugging device comprises a mounting plate; the number of the microwave assemblies is multiple, and the microwave assemblies are arranged on the mounting plate at intervals; the microwave assemblies are arranged on the mounting plate, the plugging assembly is arranged on the mounting plate, a PCB is arranged on the plugging assembly through a fixing pressing block, and the plugging assembly is used for controlling the PCB to ascend and descend up and down so that synchronous plugging of SMP interfaces between the PCB and the microwave assemblies can be achieved. According to the multi-channel SMP plugging device, synchronous plugging or dismounting of the multi-channel SMP of a large-size low-rigidity PCB and a plurality of discrete microwave assemblies can be realized, the positioning precision and uniform stress of installation are ensured, the plugging efficiency is improved, and the connector structure and the signal transmission quality are protected.

The utility model discloses a kind of battery sealing nail assembly cavities and its battery sealing machine, for sealing nail is assembled to the liquid injection port of battery, including cavity, material taking overturning component, transfer assembly component, detection component and transfer component, cavity is box-like structure, its top opening is equipped with cavity cover plate;Transfer assembly component and transfer component are arranged in parallel interval in the inside of cavity;Material taking overturning component is arranged at one end of transfer assembly component, after material taking overturning component is supported and fixed sealing nail, overturning sealing nail to horizontal direction, detect through the detection component of side portion, after detection is completed, overturning to vertical direction again;Transfer component carries battery, and drive battery to move to below transfer assembly component. The utility model realizes that sealing nail is inserted and mounted in vacuum state, effectively reduces the battery deformation caused by internal air pressure of battery in inserting and mounting process, and integrates battery automatic carrying, sealing nail transfer detection and inserting and mounting function, effectively improves sealing nail inserting and mounting efficiency.

The utility model discloses a power transformation box with a protection structure, which comprises a power transformation box body, heat dissipation holes are arranged in one side of the power transformation box body, the power transformation box with the protection structure is in threaded connection with the power transformation box body by rotating a screwing screw, a supporting plate, a supporting rod and a motor are convenient to fix and install, and fan blades are driven to rotate by starting the motor. Heat in the transformer box can be rapidly discharged from the heat dissipation holes, the heat dissipation effect of the transformer box is improved, the fan blades can be protected through the design of the protective net cover, and the situation that maintenance personnel touch the fan blades and are injured when the maintenance personnel inspect and maintain the interior of the transformer box is prevented; the right box door and the left box door are conveniently locked by inserting the pin body into the right pin seat and the left pin seat, the right box door and the left box door are prevented from being blown open in strong wind weather, the handle is rotated by 90 degrees to drive the pin body to rotate, the handle is moved towards one end to drive the pin body to be disengaged from being inserted into the left pin seat, and the right box door and the left box door lose constraint so as to be opened. The design of the pin groove facilitates the clamping of the pin body and the handle, and improves the insertion and extraction efficiency of the pin body.

The utility model relates to an insulation paper pushing mechanism, and relates to the technical field of insulation paper processing, and the insulation paper pushing mechanism comprises a rack which is used for supporting the pushing mechanism; the workbench is installed on the machine frame in a sliding mode, an installation base is arranged on the workbench, an installation groove is formed in the installation base, and a motor is installed in the installation groove; the rotating assembly is mounted on the rack, and the rotating assembly drives the mounting seat to rotate; the forming frame is installed on the machine frame, a forming groove is formed in the forming frame, and insulation paper is formed in the forming groove; the push rod is installed in the forming frame in a sliding mode, and the push rod pushes the insulation paper to the side close to the installation base; and the pushing assembly is installed on the rack, and the pushing assembly drives the push rod to slide on the forming frame. According to the insulation paper inserting device, the situation that the insulation paper is manually pushed into the motor is omitted, and the inserting efficiency of the insulation paper is improved.

The utility model relates to a shell and end cover fixing structure. The technical problem that connection between an existing motor end cover and a motor shell is not stable enough is solved. Comprising a cylindrical outer shell with at least one open end, the outer shell is formed by radially splicing two half shells, and an end cover body capable of closing the open end is arranged on the circumferential inner side of one end of the outer shell through an end cover mounting structure; and a plug-in assembly for preventing the end part from warping outwards is arranged between the inner side of one end, close to the end cover body, of each half shell and the circumferential outer side of the end cover body, and the plug-in assembly can enable one end of the outer shell and the circumferential outer side of the end cover body to be radially and mutually positioned when the two half shells are spliced. The end cover has the advantages that the end cover body can be conveniently limited through the annular flanges and the mounting lugs, and the mounting stability of the end cover body is improved. According to the plug-in assembly capable of preventing the end parts from warping outwards, the end cover bodies and the half shells can be conveniently connected in a plug-in mode, the plug-in efficiency is improved, and the plug-in effect is guaranteed. The half shells can be conveniently assembled and disassembled through the inserting grooves and the convex ribs, and the assembling and disassembling efficiency is improved.

The invention relates to the technical field of medical instruments, in particular to a urodynamic catheter which comprises a catheter body, the catheter body comprises an outer catheter body and an inner catheter body inserted into the outer catheter body, a gap is formed between the outer catheter body and the inner catheter body, an air bag is arranged on the outer surface of the outer catheter body and close to the tail end, and the air bag is communicated with the interior of the outer catheter body. An inflation nozzle is arranged on the outer surface of the outer pipe body and close to the starting end. The thin steel wire is arranged in the catheter body, the toughness of the catheter body can be enhanced by the thin steel wire during the insertion action, so that the insertion action is facilitated, and after the insertion action is completed, the thin steel wire can be pulled out without influencing the normal use of the catheter.

The utility model provides a low-cost simple magnetic frame which is of a cuboid structure formed by splicing a plurality of assemblies and comprises foam plastic modules, strip-shaped magnets and hardboards. Arc-shaped grooves are formed in the two ends of each foam plastic module, the bottoms of the foam plastic modules are pasted on the hardboard through double-faced adhesive tape, the two foam plastic modules and the strip-shaped magnets are spliced to form sample tube hole sites used for containing sample tubes, and the arc-shaped grooves are not completely closed to form windows used for observing the magnetic attraction state in the sample tubes; the strip-shaped magnets are adhered to the foam plastic module and the hardboard by adopting a double-sided adhesive tape to be fixed; the hardboard is located at the bottoms of the foam plastic module and the strip-shaped magnets and plays a role in supporting; the foamed plastic module, the strip-shaped magnet and the hardboard are wrapped by the transparent adhesive tape to form a whole; the magnetic frame can achieve the purpose of placing different numbers of sample tubes by splicing different numbers of foam plastic modules and strip-shaped magnets. The magnetic frame is low in manufacturing cost, flexible, changeable, convenient to use and high in detection efficiency.

The application discloses a slide inserting machine, and relates to the technical field of slide inserting machines, which comprises a machine body, a placing box connected to the machine body, a placing groove formed in the placing box and used for placing a slide, an elastic clamping assembly arranged at one end of the placing box, a letting-in groove arranged at the other end of the placing box and communicated with the placing groove, a slide rack slidably connected to the machine body, a first driving assembly connected to the machine body and used for driving the slide rack to slide towards or away from the letting-in groove, and a pressing mechanism connected to the machine body and used for driving the slide in the placing groove to pass through the letting-in groove and move into the slide rack. The slide in the placing groove can be sequentially inserted into the slide rack through repeated operation, automatic insertion of the slide is realized, the tedious operation of manually inserting the slide one by one by an operator is avoided, and the efficiency of the overall insertion of the slide is improved.

The invention discloses an automatic material inserting machine, and relates to the technical field of assembly equipment, the automatic material inserting machine comprises a material conveying module and a pin cutting module, the material conveying module comprises a material conveying track and a material conveying driving assembly, a material conveying cavity extending in the horizontal direction is formed in the material conveying track, and a positioning hole communicated to the material conveying cavity is formed in the top of the material conveying track; the cutting and pin inserting module comprises a cutting module, a pin inserting module and a feeding module, the cutting module comprises a cutting assembly and a first horizontal driving part, the pin inserting module comprises a pin inserting pressing rod and a first lifting driving part, the pin inserting pressing rod is correspondingly arranged above the positioning hole, and the pin inserting pressing rod and the positioning hole are arranged at an interval to form a pin inserting space. According to the invention, the terminal is fixed through the cutting assembly, and the installation shell is limited through the material conveying cavity, so that the positioning precision of the installation shell and the terminal is improved, the alignment rate and the alignment precision of the terminal are improved, the plugging efficiency is improved, the damage of the terminal is reduced, and the yield is improved.

The utility model discloses a kind of installation devices of anti-impurity plug head of cooling shell, it is related to automobile parts processing field, its technical key points are: including workbench, the top of workbench is equipped with clamping mechanism, catch material mechanism, cover plate conveying mechanism and plug head conveying mechanism;The clamping mechanism is used to clamp cooling shell, the cover plate conveying mechanism is used to convey cover plate, the plug head conveying mechanism is used to convey plug head, the catch material mechanism is used to install cover plate and plug head on cooling shell;The catch material mechanism includes the catch material base being equipped in the top of workbench, the top of the catch material base is equipped with catch material mechanical arm, one end of the catch material mechanical arm is equipped with catch material plate, the bottom of the catch material plate is equipped with a plurality of catch material suction cups, the top of the catch material plate is equipped with a plurality of vacuum air valves, to solve the technical problem that plug head is all artificial operation and leads to plugging not in place, let subsequent cooling shell processing will occur the risk of plug head drop.

The utility model discloses a kind of feeding devices for compressor piston pin plug-in installation, it includes processing table:The top of the processing table is fixedly connected with plate frame, the inner wall of the plate frame is fixedly installed with chute plate by bolt, the inner wall of the plate frame is rotatably connected with two symmetrical setting rotating rods, the surface of the rotating rod is fixedly connected with sprocket, the surface of the sprocket is drivingly connected with chain, the surface of the chain is fixedly connected with load block by bolt.The utility model drives load block and push block transmission by chain, so that push block will pin rod be pushed out from the top of chute plate to the surface of load block, simultaneously chain drives pin rod to move to plug-in station by load block, i.e. it can reach multiple pin rods can be placed in chute, subsequently transmission feeding of pin rod is carried out by the cooperation of push block and load block driven by chain, meet the demand of pin rod feeding when piston pin plug-in production, to improve the purpose of piston pin plug-in efficiency.

The utility model discloses an auxiliary jig for processing robot parts, which is characterized in that a female plugging terminal and a male plugging terminal are respectively clamped and positioned through a fixed clamping jig and a movable clamping jig, and the male plugging terminal and the female plugging terminal are aligned at the moment so as to facilitate the subsequent plugging work; and then the movable clamping jig is driven by the driving mechanism to slide towards one side of the fixed clamping jig, so that the male plugging terminals and the female plugging terminals are plugged and matched, and the plugging of each group of male plugging terminals and female plugging terminals can be ensured to meet the plugging standard (or each group of male plugging terminals and female plugging terminals are plugged in place). And meanwhile, the labor intensity of workers is effectively reduced.

The utility model provides a valve plate, an air conditioner outdoor unit and an air conditioner. The valve plate comprises a main plate body, the main plate body is provided with a high-pressure and low-pressure valve mounting notch, the high-pressure and low-pressure valve mounting notch is through in one end in the first direction, and a vacant part is formed between the lower opening wall of the high-pressure and low-pressure valve mounting notch and the plate edge of the end, in the first direction, of the main plate body. In this way, in the process that the opening wall of the opening end of the matching notch of the side plate passes through the opening end of the high-low pressure valve mounting notch, the area where the opening wall of the opening end of the matching notch of the side plate can make contact with the lower opening wall of the opening end of the high-low pressure valve mounting notch is smaller; the opening wall of the opening end of the matching notch is easier to pass through the lower opening wall of the opening end of the high-low pressure valve mounting notch, and is less likely to be inserted into the other side of the main plate body in the third direction from one side of the main plate body in the third direction through the high-low pressure valve mounting notch, so that the situation that the side plate and the valve plate are inserted and clamped together to cause assembly errors can be effectively avoided; according to the scheme, the inserting efficiency of the side rear plate can be effectively improved.

The present application provides a multi-channel SMP plug-in device, comprising: a mounting plate; a plurality of microwave components, which are arranged on the mounting plate at intervals; a plug-in component, which is arranged on the mounting plate, and a PCB board is arranged on the plug-in component through a fixed pressure block, and the plug-in component is used to control the up and down movement of the PCB board, so as to achieve synchronous plug-in and pull-out of the SMP interface between the PCB board and the plurality of microwave components. The multi-channel SMP plug-in device described in the present application can realize the synchronous plug-in or pull-out of the multi-channel SMP of a large-size, low-rigidity PCB and a plurality of discrete microwave components, ensure the positioning accuracy and uniform force of the installation, improve the plug-in efficiency, and protect the connector structure and signal transmission quality.

The present invention discloses a quick-connect structure between a center column and a base of an outdoor umbrella, comprising a center column, a base and a stop pin shaft, wherein the base is provided with a center hole; the center column is inserted and installed in the center hole, and a pin shaft hole is provided in the side wall; and the stop pin shaft can be plugged and pulled out on the base. The present invention provides a pin shaft hole on the center column, fixes the center column in the center hole of the base through a stop pin shaft on the base, and can add a center column centering seat below the center hole, add a guide tube and an anti-sway sleeve in the center column, and the stop pin shaft forms a limit to the stop pin shaft through a spring, thereby increasing the firmness of the center column installation. At the same time, the present invention provides a pin shaft stopper with a spring at the bottom in the front guide seat of the unlocking switch assembly, and a latch pin with a torsion spring is provided in the rear guide seat, which can block the pin shaft when the center column is pulled out, thereby achieving sustainable maintenance of the unlocking state and improving the efficiency of plugging and pulling out the center column.

The invention discloses a crystal head binding machine with a misalignment correction function, and relates to the technical field of network cable crystal head docking and bundling. The invention uses a pneumatic needle clamp 2 on a cylinder 2 and a movable clamp on the top of a storage box to simultaneously press eight network cables inserted in a shell, and uses a CCD camera to take real-time network cable images, and generates a control signal after computer processing and sends it to a control console. The relay power is used to adjust the polarity of multiple groups of electromagnets in the storage box, thereby realizing the subsequent adjustment of the height of the pressing block and realizing the corresponding bending deformation of the network cable. Subsequently, the pneumatic needle clamp 1 on the rotating block is tightened and turned, and the pneumatic needle clamp 2 on the cylinder 3 is pressed, so that the subsequent insertion of the crystal head is convenient, the insertion efficiency of the entire crystal head and the network cable is improved, and the accuracy of the network cable insertion is guaranteed.

The utility model discloses a mobile phone data line performance detection device which comprises a base and a frame arranged on the base, an installation transverse plate is horizontally arranged in the middle of the frame, at least one installation pipe is vertically arranged on a top beam of the frame downwards, and the bottom end of the installation pipe penetrates through the installation transverse plate and is provided with a driving part. Clamping parts are arranged on the two sides of the driving part, the driving part can make the clamping parts move up and down in a reciprocating mode, the clamping parts can clamp and fix the ends of the data lines, an inserting part is arranged on the lower surface of the installation transverse plate, and the ends of the data lines can be inserted into the bottom of the inserting part. According to the utility model, the two ends of the data line are subjected to plugging detection at the same time, multiple data lines can be detected at the same time, the reciprocating motion of plugging is realized through the electromagnetic structure, and compared with a traditional mechanical structure, the electromagnetic structure acts more quickly, the plugging efficiency is higher, the stability is better, the control is convenient, and the automation degree is high; and the detection efficiency is greatly improved.

The utility model discloses a hydrogen cylinder joint capable of being quickly inserted and pulled, which comprises a hydrogen cylinder body, a shut-off valve is arranged at the top of the hydrogen cylinder body, the surface of the shut-off valve is communicated with a connecting pipe, and an insertion pipe is inserted into the connecting pipe. A second spring is arranged to extrude a positioning block, then the top of the positioning block is clamped into a positioning hole, the effect of limiting a movable block is achieved, the stability of clamping one side of a clamping block into a clamping groove is further improved, the positioning block is pressed downwards, the positioning block is made to be separated from the interior of the positioning hole, and the positioning block is clamped into the clamping groove. Under the elastic action of a first spring, a movable block is bounced off, one side of a clamping block is conveniently separated from the interior of a clamping groove, an insertion pipe is conveniently pulled out of a connecting pipe, therefore, the insertion and extraction efficiency of the insertion pipe is improved, the connecting efficiency of the insertion pipe is improved, and meanwhile the problem that an existing hydrogen cylinder connector is generally mounted and dismounted through threaded connection, and the connecting efficiency is poor is solved. A user needs to rotate for multiple circles for operation, the connection is troublesome, and the connection efficiency is low.

The utility model relates to the technical field of intelligent lighting lamp bodies, and discloses an intelligent lighting lamp quick-plug installation structure which comprises a control driving device and an intelligent lighting lamp body, the right surface of the control driving device is fixedly connected with two connecting wires, one end, away from the control driving device, of each connecting wire is fixedly connected with a plug, and the plug is fixedly connected with a socket. According to the quick-insertion mounting structure for the intelligent lighting lamp, the rotating sleeve is rotated clockwise, and the rotating sleeve applies acting force to local inclined threads on the rotating clamping block through inclined threads on the rotating sleeve, so that the local inclined threads are driven to continuously lock the inclined threads; through the operation of the structure, the connection between the plug and the socket can be effectively guaranteed, the plug is prevented from falling off due to external factors, and the situation that children get an electric shock accidentally after easily pulling out the plug is also avoided; the convenience, safety and stability of plug connection are improved to a certain extent.

The present disclosure relates to a timer implementation method, device, vehicle and computer program product, and relates to the field of computer technology. The method comprises: receiving a task to be added, and obtaining the task type of the task to be added, wherein the task type comprises a high-frequency task and a low-frequency task; determining a target queue corresponding to the task type, wherein the target queue comprises a fixed-time queue and a mixed queue; and adding the task to be added to the target queue. The present disclosure can improve the efficiency of task insertion by inserting the task to be added into different queues according to different task types.

The utility model relates to a sand prevention valve core for an inflatable ball, belongs to the technical field of valve cores, and aims to solve the problems that in the using process of an existing inflatable ball, sand grains or particle sundries can be filled in an inflation hole of the valve core, the sand grains or particle sundries can influence normal use during inflation, and the valve core is damaged or the use of the inflatable ball is influenced. The valve core comprises a valve core body, an inflation hole penetrating through the valve core body is formed in the valve core body, a hole body, at least located at one end of the outer side of a ball body, of the inflation hole is of an air inlet small hole structure, and when the valve core body is installed on the ball body, the air inlet small hole is automatically closed and sealed under the elastic effect. According to the sand-prevention valve core for the inflatable ball, the sand-prevention effect of the ball body can be effectively improved, and the service life of the valve core and the inflatable ball is prolonged.

The utility model belongs to the technical field of red line pile inserting, and particularly relates to a red line pile inserting auxiliary device which comprises a sleeve, a bamboo pole centralizer, a pedal and a manual centralizing rod, the bottom end of the manual centralizing rod is inserted into the sleeve, the bamboo pole centralizer is arranged on one side of the sleeve and used for fixing a bamboo pole to be inserted, the pedal is arranged on the surface of the sleeve, and the manual centralizing rod is arranged on the pedal. And the bamboo pole centralizer is arranged opposite to the bamboo pole centralizer. The utility model has the advantages of few components, simplicity in manufacture, convenience in construction, suitability for red line lofting and pile insertion of various non-rock stratum projects such as roads, railways, municipal administration and the like, and capability of greatly improving the working efficiency.

The utility model discloses a kind of plug-in grating structures, belong to indoor decoration engineering technical field, including baffle and connecting column, the upper surface of the baffle is provided with limiting assembly and positioning assembly;In the utility model, by setting limiting assembly and positioning assembly, the upper surface and the lower surface of connecting column and baffle are flush, while limiting block will be limited to connecting block, under the action of connecting spring and telescopic rod, connecting plate will be driven to descend, while connecting plate drives positioning rod to insert into positioning hole, realize automatic keeping flush after grating splicing, reduce the step of manual adjustment, improve the plug-in efficiency of grating, simultaneously realize the function of automatic fixing after grating angle adjustment, avoid automatic change after grating angle adjustment, improve the stability and convenience of grating use, adopt the mode of finished material field installation, only need to be inserted according to the structure direction and be connected to adhere, avoid a lot of fixed-size line work in traditional construction process.