1738 results about "Screw cap" patented technology

The invention discloses a screw cap structure with a face shell convenient to replace and a lacing device comprising the screw cap structure, the screw cap structure with the face shell convenient to replace comprises an inner screw cap and the face shell, the face shell is detachably installed on the outer side of the inner screw cap, a clamping block is arranged on the face shell, a separating and combining structure is arranged on the inner screw cap, and the clamping block is detachably installed on the outer side of the face shell. The clamping block is matched with the separation and combination structure to realize clamping and separation of the inner screw cap and the surface shell; the opening and closing structure comprises a first position and a second position, and when the clamping block and the opening and closing structure are connected in a matched mode at the first position, the face shell and the inner screw cap can be connected in a linkage mode. And the face shell can also rotate relative to the inner screw cap, so that the clamping block is rotated to a second position of the separating and combining structure, and the face shell and the inner screw cap are separated from each other at the second position, so that the disassembly between the face shell and the inner screw cap is more convenient, and the requirement of a user for quickly replacing the face shell is met.

The invention provides a mine inspection robot, and relates to the technical field of inspection robots, the mine inspection robot comprises a body and a mechanical arm mechanism, the mechanical arm mechanism is arranged at the top of the body, driving wheel sets are fixedly installed on the two opposite sides of the body, a snake-shaped mechanical arm is arranged at the output end of a connecting end shaft, and the main body of the mine inspection robot is composed of a plurality of arm body small sections; the side, away from the connecting end shaft, of each arm body small section is detachably provided with a connecting screw cap, the hinged position of each arm body small section is sleeved with a rubber protective sleeve, and the outer wall of each connecting screw cap is provided with an arc-shaped protruding structure used for supporting the strength of the corresponding connecting screw cap and protruding to expand the corresponding rubber protective sleeve. According to the invention, the joint is sealed and actively cleaned through segmented supporting and the rubber protective sleeve, so that the problems of joint failure, frequent maintenance and the like caused by movement clamping stagnation and dust invasion which are difficult to deal with by a conventional snake-shaped mechanical arm in a high-dust and multi-bending environment under a mine are effectively solved; and meanwhile, the problems that joints are blocked by accumulated dust and sealing is eroded in the high-dust environment under the mine are solved.

The invention discloses an unmanned underwater vehicle floating material fixing structure, and relates to the technical field of underwater vehicle buoyancy materials. In order to solve the problems that in the prior art, a buoyancy material of an underwater vehicle is generally fixedly connected with the vehicle through a bolt, a polycarbonate protective layer is sprayed outside a hollow glass bead floating material, the floating material is easily damaged by replacing the buoyancy material and disassembling the bolt in the later period, and the buoyancy material is relatively fragile and cannot be damaged. The floating material is abraded due to repeated disassembly, and the polycarbonate protective layer is easy to fall off after long time, and the like. The device comprises a floating material, a screw sleeve, a nut sleeve and a protective layer, the floating material is arranged in an aircraft cabin composed of a framework and a non-pressure-resistant shell, a bolt through hole is machined in the floating material, a screw sleeve and a nut sleeve are embedded in the bolt through hole, and the outer portion of the floating material is integrally wrapped with a protective layer. The method is used for mounting and fixing the floating material of the unmanned underwater vehicle.

The utility model discloses a 3D printing porous pedicle screw which comprises a screw body part and a screw cap part, the screw body part comprises a cortical bone thread area close to one end of the screw cap part and a cancellous bone thread area far away from one end of the screw cap part, and a porous structure area is arranged at one end, not connected with the screw cap part, of the screw body part. The porous structure area comprises an inner core column extending in the axial direction of the nail body part, at least one reinforcing beam and a porous structure, the reinforcing beams extend outwards from the periphery of the inner core column, and the porous structure is annularly distributed on the outer periphery of the inner core column. The porous structure can efficiently induce bone tissue to grow in, the screw and a vertebral body are connected into a whole, stress is effectively dispersed, the stability of the screw is improved, the porous structure is arranged on the vertebral body at the front end of the screw, screw breakage caused by stress concentration of the screw in a vertebral pedicle area can be avoided, meanwhile, the stability of the screw can be better improved through the reinforcing beam, and the service life of the screw is prolonged. The possibility of fracture of a porous area of the screw is reduced, generalization performance is better, and the use experience feeling is improved.

The utility model provides a spherical contact type movable joint, and belongs to the field of high-pressure pipe fitting manufacturing. The connecting device comprises a main body, a joint and a connecting nut, a thread is arranged at one end of the main body, and the joint is clamped in the coupling nut; the coupling nut is connected with the thread, so that the joint is connected with the main body; a spherical plug is arranged at one end, facing the main body, of the joint, and an arc-shaped groove is formed in the main body; a sealing gasket is arranged in the groove; and the spherical plug is in contact with the groove through the sealing gasket. According to the utility model, the joint and the main body are directly designed to be in spherical contact and are sealed by the sealing gasket, so that the sealing effect is good, and leakage caused by vibration can be effectively avoided.

The invention discloses a printed circuit board and electronic equipment, and relates to the technical field of printed circuit boards, the printed circuit board comprises a circuit board main body and an elastic part, a buffer groove is arranged at the outer side of a fixing hole of the circuit board main body, and the elastic part is installed, so that the elastic part is elastically abutted against a screw cap, and buffer vibration absorption and stress dispersion during screw fastening are realized; local stress concentration caused by rigid contact is avoided, and the problems that in the prior art, stress around a screw hole is concentrated in the screwing process of a screw, consequently, a server mainboard cracks or deforms, and the performance and the service life of electronic equipment are affected are solved. The technical effects of improving the mechanical stability of the circuit board, prolonging the service life and enhancing the equipment reliability are achieved.

The invention discloses an instantly-prepared beverage bottle cap, a beverage bottle and a filling method of the instantly-prepared beverage bottle cap, the bottle cap comprises a spiral upper cap and a spiral lower cap, a pull ring is connected between the spiral upper cap and the spiral lower cap, and a poking cone is movably arranged in the lower cap; the lower cap comprises a lower cap body in threaded connection with a beverage bottle opening and a containing cavity penetrating through the lower cap body and integrally connected with the lower cap body, and the bottom of the containing cavity is closed. The top of the containing cavity communicates with a connecting body, and a limiting ring is arranged at the communicating position of the connecting body and the containing cavity and on the inner wall of the connecting body. A lower shell integrally formed with the lower end of the connecting body is arranged on the outer side of the lower cover body; the poking cone comprises a cylindrical barrel and a conical puncturing structure, an annular flange is arranged on the upper portion of the cylindrical barrel and makes contact with the inner wall of the connecting body, an extrusion ring is arranged at the inner end of the top of the upper spiral cover and tightly attached to the annular flange, and the upper spiral cover rotates to drive the extrusion ring to extrude the annular flange to slide. And the poking cone is driven to slide in the connecting body to pierce the bottom of the accommodating cavity. The problem that the bottom of the dissolving cavity is not easy to poke is solved.

The utility model discloses a long pipe type storage cover and a packaging bottle. The storage cover comprises a rotary cover, a lower cover, a storage tube and a moving part, the lower cover, the storage tube and the moving part are transparent, the turned edge of the storage tube is configured to be pressed on the bottle opening of the bottle by the lower cover, a first elastic layer is arranged at the upper end part of the storage tube, and a part of the first elastic layer is located between the turned edge and the lower cover; the top end of the moving part can be connected with the screw cap, the moving part is in threaded connection with the lower cap so as to be driven by the screw cap to rotate and move downwards relative to the lower cap, and a second elastic layer is arranged on the outer surface of the neck of the moving part. The lower cap is provided with an inner skirt capable of extending into a bottle opening of the bottle, the inner skirt is located between the storage pipe and the moving part, the outer surface of the inner skirt makes contact with the first elastic layer, and the inner surface of the inner skirt makes contact with the second elastic layer. The part, extending into the bottle, of the storage cover is transparent, so that internal substance observation and quality supervision are facilitated, and attractiveness and sealing performance can be taken into consideration at the same time.

The invention belongs to the technical field of petroleum and natural gas development, and particularly relates to a visual reservoir core relative permeability high-precision measuring device and method based on an unsteady state method. The device comprises a clamp holder, three glass tubes, a flow drum, a water metering pump, a gas-liquid separation tube, an annular pressure pump, a gas cylinder, an annular pressure sensor, a pressure regulating valve and an injection pressure sensor. The holder comprises a support, a barrel, a pull rod nut assembly, an adjusting screw rod, a restraint frame, an inlet plug, two pressing caps, a baffle ring, a sealing ring, a rock core cone, a transparent rubber sleeve and an outlet plug. The method comprises the following steps: 1, core pretreatment; 2, carrying out liquid measurement on the permeability; 3, displacement pressure is determined; 4, calculating the pore volume of the rock core; and 5, gas-driven water test and dynamic permeability calculation. The problems that reservoir rock core relative permeability measuring equipment is complex, inaccurate and difficult to use, and the stress state of the rock core is not comprehensively simulated are solved.

The utility model belongs to the field of camera lenses, and particularly relates to a camera lens convenient to replace, which comprises a lens body, and a lens seat is mounted in an inner cavity of the lens body. According to the utility model, through the arrangement of the positioning mechanism, the lens body is firstly placed in the lens seat, after the lens body is installed, the positioning seat is pushed to move, the positioning seat drives the connecting plate to move, the connecting plate drives the elastic clamping block to move, and the surface of the elastic clamping block can be inserted into the inserting groove in the moving process of the elastic clamping block; the positioning seat can be stably fixed on the front side of the lens body and the lens body can be conveniently fixed in the lens seat, so that the problems that the lens is generally fixedly mounted through a threaded screw cap, and the screw cap is generally firmly connected with the lens in order to ensure the stability of the lens, so that the lens is difficult to fix are solved. Therefore, the problem that the replacement efficiency of the lens is reduced due to the fact that the lens is very inconvenient to disassemble is solved.

A captive screw closure with a tamper-evident band and a screw cap captively connected thereto is disclosed. The screw closure includes an outer surface with an internal thread and an upper surface. The mechanical strain on the retaining bands are substantially reduced. This is achieved by the screw closure having at least one pulling element which permits a pure axial longitudinal movement of the screw cap to the tamper-evident band in the direction of the longitudinal axis of the screw closure. The screw closure includes a pivoting element, in particular a pivoting plate, connected either fixedly or pivotably to the tamper-evident band. The pivoting element, in particular the pivoting plate, is detachably connected to the screw cap. The pivoting element, in particular the pivoting plate, may be connected to the screw cap in a fixed but pivotable manner.

The invention provides a sterile filling process control method and system for midazolam oral liquid nitrogen charging protection, and relates to the technical field of medicine filling process control. After midazolam oral liquid is subjected to nitrogen charging, a headspace gas multispectral image sequence in a bottle before sealing is collected through a transmission imaging system integrated with a filling line; extracting oxygen characteristic absorption wave band light intensity attenuation data through spectrum separation, and generating a bottleneck plane oxygen two-dimensional concentration diagram; calculating the local oxygen partial pressure of the pixel, and constructing a three-dimensional oxygen concentration field and marking an oxygen-enriched area by combining pre-stored geometric parameters of the bottle body; and then the model reference adaptive controller is used for comparing the model with an ideal nitrogen model to generate supplementary parameters containing purging angle, intensity and time, an execution mechanism is driven to perform fixed-point pulse purging, and after verification reaches the standard, a screw cap is used for sealing, so that accurate detection, directional processing and standard verification of the headspace oxygen-enriched area in the midazolam oral liquid bottle can be realized, and the safety of the midazolam oral liquid bottle is ensured. And the oxygen concentration before sealing meets the standard.

The invention discloses a copper-magnesium-aluminum spot welding device, and relates to the technical field of spot welding of dissimilar materials. The device comprises a hydraulic rotary seat, a driving assembly is installed at the top of the hydraulic rotary seat, a driving shaft is installed at the output end of the driving assembly, a jacking sleeve assembly is fixedly installed at the bottom of the hydraulic rotary seat, and the driving shaft is rotationally connected into the hydraulic rotary seat and the jacking sleeve assembly; a jacking oil cylinder is fixedly connected to the bottom of the hydraulic rotary seat, a gap exists between the jacking oil cylinder and the jacking sleeve assembly, and a plate to be connected is placed between the jacking oil cylinder and the jacking sleeve assembly. Through the unique design of the internal threads and the external threads of the cock sleeve and the synergistic effect of the driving motor and the hydraulic system, high-quality spot welding of the copper-magnesium-aluminum dissimilar alloy is achieved, and the problems of joint brittle failure caused by excessive intermetallic compounds in traditional melting spot welding and gaps existing in traditional riveting are effectively solved.

The invention belongs to the technical field of transformer gear adjusting, and particularly relates to an excitation-free pole-mounted transformer gear adjusting device which comprises a supporting assembly, an execution assembly and a positioning camera, the supporting assembly comprises a base and a supporting rod arranged on the base, and a supporting arm is arranged at the top of the supporting rod; the execution assembly is arranged below the supporting arm and used for adjusting the gear of the transformer, the positioning camera is arranged on the supporting arm and used for calibrating the position of the execution assembly, the supporting rod is a multi-stage telescopic rod, a connecting block is arranged at the top end of the supporting rod, and one end of the supporting arm is fixed to the connecting block. According to the gear adjusting device, screwing-out and resetting of the protective screw cap are achieved through cooperation of the linear sliding rail and the electric rotary clamping jaw, manual climbing operation is not needed, the high-altitude falling risk and the hidden danger of electric shock existing in climbing operation are effectively avoided, and the working efficiency of gear adjusting is improved.

According to the technical scheme, the automatic assembling machine is characterized in that the automatic assembling machine comprises a workbench, a positioning assembly, a flat gasket feeding assembly, a main body feeding assembly, a waterproof ring feeding assembly, a nut feeding assembly and a comprehensive assembly used for assembling and discharging nuts, and the positioning assembly comprises a rotary disc and a plurality of stations; the multiple stations comprise the flat gasket feeding station, the main body feeding station, the waterproof ring feeding station, the nut feeding station and the discharging station which correspond to the flat gasket feeding assembly, the main body feeding assembly, the waterproof ring feeding assembly, the nut feeding assembly and the comprehensive assembly correspondingly. The multiple stations are each provided with an outer cylinder, an inner cylinder elastically connected with the outer cylinder and a positioning rod with one end penetrating out of the inner cylinder and used for being connected with the main body shell in a sleeved mode, the outer diameter of the inner cylinder is matched with the inner diameter of the outer cylinder, one end of the inner cylinder is limited in the outer cylinder, and the end, used for being connected with the nut, of the main body shell can be partially inserted into the inner cylinder. The problems that in the prior art, procedures are numerous, and occupied space is large are solved.

Attachment for cleaning air filters, comprehensive: - a fixed part of the attachment, which is designed in the form of a connector, - a closed rolling bearing with inner and outer rings, wherein one end of the connecting piece is rigidly connected to the inner ring of the rolling bearing, - a rotor which is rotatably mounted on the outer ring of the rolling bearing in relation to the fixed part of the attachment, - a screw cap, wherein the rotor has a hollow housing comprising an upper and a lower housing surface as well as a side surface connecting the upper and lower housing surfaces, The side surface of the housing has at least two openings whose axes of symmetry are perpendicular to each other and are located in the plane of rotor rotation, with a receiving opening being provided in the middle of the upper housing surface; the outer ring of the rolling bearing engages in the receiving opening of the rotor housing and is then fixed by the screw cap.

The utility model belongs to the technical field of metal drum production equipment, and particularly relates to a metal drum cap screwing device which comprises a screwing mechanism, the screwing mechanism comprises a base, an installation frame is connected to the base in a sliding mode, the installation frame comprises a beam, an installation plate is connected to the beam in a sliding mode, and an installation base is connected to the installation plate in a sliding mode. A first motor and a first rotating shaft are vertically and fixedly connected to the mounting base, a driving gear is fixedly connected to an output shaft of the first motor, a driven gear is fixedly connected to the first rotating shaft, the driving gear is meshed and matched with the driven gear, and a pneumatic clamping jaw is fixedly connected to the bottom of the first rotating shaft; and a visual detection assembly is fixedly mounted on the mounting seat. By arranging the visual detection assembly, the position of a barrel opening can be accurately recognized and positioned, by arranging the first motor and the first air cylinder, after the pneumatic clamping jaw clamps a barrel cover, the position is gradually lowered while the pneumatic clamping jaw rotates, and then the barrel cover can be screwed into the barrel opening.

The utility model discloses a wound stoma flushing device convenient for collecting waste liquid, relates to the technical field of medical instruments, and aims to solve the problems that the flushing force is not easy to adjust during wound stoma flushing and the waste liquid generated after flushing is not easy to collect. The output end of the small water pump is fixedly connected with a liquid outlet pipe, and the right outer wall of the liquid outlet pipe penetrates through the right outer wall of the mounting shell and fixedly communicates with a T-shaped hollow block. The screw cap is rotated to drive the screw rod to rotate, the wedge-shaped block extrudes the stress column, then the stress column pushes the blocking block to move upwards, the flow of cleaning liquid is controlled through the volume of the blocking block extending into the transverse section of the T-shaped hollow block, waste liquid generated after flushing flows into the conveying pipe through the drainage hole, and the cleaning effect is improved. The waste liquid is conveyed into the collecting tank through the conveying pipe to be collected, and the problems that the flushing force is not easy to adjust during wound stoma flushing and the waste liquid generated after flushing is not easy to collect are effectively solved.

A container with a screw cap is produced from a plastics material, by blow molding, and has a body with a first end and a second end, which is located opposite the first end, and with a lateral surface located therebetween, wherein a base with a standing surface is formed at the second end and an opening is formed at the first end, and wherein the opening is defined by a neck, which encloses the opening and is formed in one piece with the container, an external thread being formed on the neck, wherein the screw cap is provided with an internal thread which, when the screw cap has been placed in position, interacts with the external thread, and wherein a sealing element is formed on the inner side of the screw cap.

1. The name of the design product: the screw cap for fastening device (JS-public version). 2. The use of the design product: the product is applied to the fastening device of shoes, hats and clothing; the user can tighten the laces by rotating the product and through the fastening device, so as to tighten the articles through the tightened laces. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

The utility model relates to the technical field of pre-embedded parts, in particular to a handrail clamping groove pre-embedded part which comprises a supporting plate and through holes, the four through holes are formed in the supporting plate, and a clamping groove plate is fixedly connected to the upper surface of the supporting plate. A through hole in a handrail penetrates through the outer wall of a screw rod, the upper end of the screw rod is exposed out of the handrail, a nut is screwed to the outer wall of the screw rod, the position of the nut in the vertical direction is changed when the nut rotates, the nut drives a second gasket to move, the second gasket is tightly attached to the handrail, a first gasket is tightly attached to a clamping groove plate, and the handrail is erected on an embedded part. The handrail is fixed to the clamping groove plate through the screw, the nut, the first gasket, the nut and the second gasket, the reinforcing steel bar is embedded into the structure, the pre-embedded part is embedded into the structure during construction, damage to the structure is avoided, and the handrail can be dismantled and reused at any time through movable connection of the screw, the nut, the first gasket, the nut and the second gasket. The structure is not easy to damage by the method.

The invention relates to the technical field of downhole tools, in particular to an oil-submerged pump rapid wiring device which comprises a wiring pipe, an electronic bin sealing shell, a sealing screw cap, a sealing gland, a wiring socket, a throwing-fishing socket leading-in main line and a small flat cable leading-out line. At least one left-right through wiring groove is formed in the outer side of the wiring pipe located on the outer side of the eccentric overflowing hole at intervals along the circumference, an electronic bin groove is formed in the outer side of the wiring pipe corresponding to the middle position of the wiring groove, and an electronic bin sealing shell is fixedly installed in the electronic bin groove. The device is reasonable and compact in structure and convenient to use, and by arranging the connector socket, a drop-and-pull socket leading-in main line and a small flat cable leading-out line are rapidly connected into the electronic bin sealing shell; the three lead-out holes are arranged on the sealing gland, so that each small flat cable lead-out wire is independently led out of the electronic cabin sealing shell, mutual winding is avoided, and the small flat cable lead-out device has the characteristics of stability, reliability and high efficiency.

The utility model discloses an early-warning telescopic pad structure for a nut sealing cap, and aims to provide the early-warning telescopic pad structure for the nut sealing cap, which is good in sealing effect and good in early-warning use effect. Comprising a sealing cushion block, the sealing cushion block is installed in a nut shell connected with a connecting pipe of an air conditioner evaporator, a sliding groove is formed in the outer top of the sealing cushion block, a compression cavity is formed in the inner top of the sealing cushion block, and the compression cavity communicates with the sliding groove; the early warning sliding column comprises an early warning end and a connecting end, the early warning end of the early warning sliding column is inserted into the early warning observation cavity of the nut shell, and the connecting end of the early warning sliding column is inserted into the sliding groove and connected with the compression cavity in a matched mode. The utility model has the beneficial effects that the sealing effect is good, and the influence of the sealing performance of the sealing cushion block and the nut shell on early warning observation is avoided; and the early warning sliding column slides stably and reliably, so that the accuracy of the obtained observation signal is ensured, and the good early warning use effect is ensured.

1. The name of the design product: pneumatic and manual dual-purpose sleeve. 2. The use of the design product: used for matching with wrench to screw the sleeve including nut, nut, screw, eccentric wheel, bolt, screw. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: design 1 perspective view 1. 5. Design 1 is designated as the basic design.

A capped bamboo-joint screw includes a screw body with a set of threaded grooves and a set of unthreaded areas on its outer surface. An adapter post is connected to the left side of the screw body, and a nut is connected to the left side of the adapter post. This device utilizes the alternating distribution of threaded grooves and unthreaded areas. When adjusting the screw length, the user can use pipe wrenches or wire cutters to clamp the unthreaded area and precisely cut it off along a preset break point. The threaded grooves remain intact after cutting, not affecting subsequent threaded connections with nuts or installation components, greatly expanding the length adaptability range and reducing the need for stock specifications. Simultaneously, the Phillips head groove on the left side of the nut, in conjunction with the adapter post, ensures that torque is effectively transmitted to the threaded section when tightening the screw with tools, enhancing installation stability. Furthermore, the integrated metal cap design makes this product aesthetically pleasing and provides excellent protection.

The utility model relates to the technical field of fabric splicing, and disclose a kind of anti-deviation compression mechanism of fiber fabric splicing forming, including presser bar seat, the top of presser bar seat is provided with presser bar main body, the top of presser bar seat is provided with workbench, the side of workbench is provided with anti-deviation compression assembly, the utility model is provided with anti-deviation compression assembly on presser bar seat, wherein the compression of anti-deviation compression assembly Resisting contact board is rotatably arranged on the top of limiting sliding block by rotating connecting shaft, and limiting sliding block is slidably inserted in limiting sliding slot, so that the position adjustment of compression Resisting contact board on the top of workbench is more convenient, the two sides of rotating connecting plate are fixed by fastening screw cap on fastening screw rod, effectively prevent the possibility of fiber fabric from deviating during splicing, so that fabric heat bonding is more stable, and the device can quickly complete the compression of fabric splicing, meet the processing needs of user.

The utility model relates to the technical field of drainage pipes, and discloses an anti-blocking drainage pipe which comprises a drainage pipeline, an anti-blocking barrel, a water passing groove, a connecting thread, a fixed cover plate, a fixed screw cap, a connecting pipe and a sealing groove. A water passing groove is fixedly formed in the drainage pipeline, a connecting thread is fixedly arranged in the anti-blocking barrel, a fixed cover plate is fixedly arranged at the left end of the anti-blocking barrel, a fixed screw cover is fixedly arranged at the right end of the fixed cover plate, and a connecting pipe is fixedly arranged at the upper end of the drainage pipeline. According to the anti-blocking drainage pipe, the drainage pipe is improved, so that the anti-blocking capacity of the drainage pipe is improved, in the actual use process of the drainage pipe, blocking objects can be rapidly and effectively discharged from the drainage pipe according to needs, and the drainage pipe can adapt to various environments conveniently; and the drainage effect of the anti-blocking drainage pipe is improved.

The invention relates to an aroma diffuser for a disposable water bottle, particularly a plastic one, comprising a neck surrounded by a thread for a screw cap and a collar located below the thread of the neck, comprising: an aroma reservoir, comprising: a hollow body: annular / partially annular in shape so as to be able to be placed around the neck of the bottle, below the collar, and comprising one or more aroma diffusion orifices; an absorbent material suitable for: containing at least one aroma in liquid form; at least one aroma capsule, comprising a closed outer casing, containing a liquid aroma, being capable of opening so that the aroma is released into the absorbent material by simple pressure exerted on a portion of the aroma reservoir, the aroma capsule being located inside the absorbent material which is surrounded by the hollow body. Figure for the abstract: Figure 7

The application provides a water body suspended matter grading sampling device, which comprises a driving unit and a grading sampling unit, a plurality of collection modules are nested to form the grading sampling unit, the collection modules with different filter screen cloth aperture diameters are sequentially nested and fixed from top to bottom by using a lock chain structure, and the aperture diameter of the nested collection module is larger than that of the nested collection module, so that the grading sampling of the water body suspended matter with different particle sizes is realized at one time, and the grading sampling work flow of the water body suspended matter is simplified; the collecting bottle is directly fixed on the collector by using the combination of a buckle and a nut for sampling, instead of the mode of "collecting the water body suspended matter sample by using the collector and then pouring the sample into the collecting bottle by controlling the valve", so that the whole sampling process can be realized by one person, and the sampling efficiency of the water body suspended matter is improved.

1. Name of this design product: Flat fork guard plate screw cover. 2. Purpose of this design: To cover the screw holes on the flat fork plate of an electric bicycle, providing a tight fit and protection for the screws. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.