82 results about "Circumferential rings" patented technology

The invention discloses an anti-scouring system for an offshore pile foundation, belongs to the technical field of offshore pile foundations, and can solve the problems that in the prior art, the installation difficulty is large, and the adaptability to the marine environment is poor. The system comprises a plurality of spoilers which are annularly distributed in the circumferential direction of the pile foundation. The horizontal plane projection of the spoiler is in a symmetrical sharp corner shape, the spoiler comprises a sharp corner end and a diffusion end which are opposite to each other, the sharp corner end is elastically connected with the pile foundation and can vertically swing under the action of ocean current, and the diffusion end overhangs in the direction away from the pile foundation; the center axis of the spoiler intersects with the axis of the pile foundation, and the sharp corner end is higher than the diffusion end. The spoiler is provided with two wing plates which are symmetrically distributed along the central axis of the spoiler, and the section of each wing plate on the section perpendicular to the central axis is in a concave arc shape. And a gap is formed between the diffusion ends of the adjacent spoilers. The anti-scour protection device is used for anti-scour protection of the offshore pile foundation.

The utility model discloses a large rotary kiln cylinder sectional type processing and assembling device which divides a rotary kiln cylinder into a first cylinder and a second cylinder, supporting assemblies are detachably arranged at the positions, close to the inner portions of the ends, of the two ends of the sectional cylinder, center shafts of the two supporting assemblies are connected with a driving mechanism through bearings, and the driving mechanism drives the sectional cylinder to rotate. A butt-joint assembly is fixedly arranged on the inner wall circumference of the end of the butt-joint position of the two sections of segmented barrel bodies in the circumferential direction, and the first barrel body and the second barrel body are assembled in a butt-joint mode through the butt-joint assembly and welded into the whole rotary kiln barrel body. The device is scientific and reasonable in design, the large rotary kiln barrel is machined in a segmented mode, and multi-directional flexible machining is provided for the large rotary kiln barrel; and meanwhile, the concave flange and the convex flange which are matched with each other are arranged on the inner walls of the butt joint ends of the segmented barrel bodies, so that the centering butt joint positioning accuracy during assembly of the segmented barrel bodies is improved, the overall assembly production efficiency of the large rotary kiln body is improved, and normal and safe operation of the rotary kiln is guaranteed.

The utility model relates to the technical field of OB acid production, in particular to a convenient-to-discharge hydrolysis kettle for OB acid production and processing, which comprises a vertical reaction kettle body, a bottom discharge valve is mounted at the bottom of the vertical reaction kettle body, and a plurality of side discharge ports which are sequentially staggered from top to bottom are formed in the side wall of the vertical reaction kettle body. A plurality of side discharge ports are formed in the vertical reaction kettle body, a rotary sleeve which is hermetically and circumferentially surrounded on the vertical reaction kettle body is arranged outside the plurality of side discharge ports, a plurality of side discharge pipes which can be communicated with the plurality of side discharge ports one by one are fixedly communicated with the outer part of the rotary sleeve, and side discharge valves are fixedly mounted on the plurality of side discharge pipes. And the discharging accuracy is high, the discharging speed is high, and the production efficiency of the OB acid is further improved.

The utility model relates to a kind of hydraulic oil cylinder cylinder barrel inner wall cleaning equipment, including support frame, electric push rod, water tank and cleaning disc are sequentially installed from left to right on support frame;The output shaft of the electric push rod top is installed with the lifting plate extending to right, and the downside rotationally connected with cleaning cylinder at the right end of lifting plate;The outer circumferential ring of the cleaning cylinder is provided with multiple spray heads;Still including driving motor, screw rod, lifting frame, connecting plate, telescopic link, articulated rod, scraper and sponge block;The clamping assembly for fixing cylinder barrel is slidably connected on the cleaning disc. Through the cooperation of clamping assembly and lifting frame on cleaning cylinder, the cylinder barrel of different barrel diameter can be adapted, so that the scraper and sponge block on connecting plate can be contacted with the inner wall of cylinder barrel through linkage with lifting frame, and the inner wall of the cylinder barrel of different barrel diameter is quickly cleaned.

The utility model relates to the technical field of low-nitrogen combustors, and provides a low-nitrogen combustor internal pressure detection device which comprises a multilateral lantern ring assembly, a plurality of triangular turning plates and a force detection mechanism, the multilateral lantern ring assembly is fixedly arranged on one side, close to a ventilation pipeline, of a primary air pipe and a secondary air pipe, and the triangular turning plates are arranged on the multilateral lantern ring assembly. The multiple triangular turning plates are rotationally connected to the multilateral lantern ring assembly, the multiple triangular turning plates are arranged in the primary air pipe and surround the primary air pipe in a circumferential mode, the multiple side edge contact strength detection mechanisms of the adjacent triangular turning plates are arranged, and the multiple strength detection mechanisms are fixedly connected to the multilateral lantern ring assembly. By means of the technical scheme, the problem that in the prior art, when airflow flows unstably, the real gas pressure is difficult to measure is solved.

The application discloses a parallel six-degree-of-freedom wrist and a robot, and relates to the technical field of robots.The parallel six-degree-of-freedom wrist comprises an upper platform, a lower platform and direct drive units, the upper platform and the lower platform are arranged at intervals, the direct drive units are arranged between the upper platform and the lower platform in a circumferential ring manner, the direct drive units have first ends and second ends, the direct drive units can be telescopically operated to drive the first ends to move away from or close to the second ends, the first ends are pivotally connected with first connecting units, the first connecting units are swingingly arranged on the lower platform about an axis perpendicular to the lower platform, the second ends are pivotally connected with second connecting units, the second connecting units are fixedly connected with the upper platform, and the at least three direct drive units are used for driving the upper platform to perform angular motion and / or linear motion relative to the lower platform.The parallel six-degree-of-freedom wrist can simultaneously perform angular displacement and linear displacement motion, and has high flexibility.

The application provides a winding mold for a composite shell with a special-shaped rubber layer and a use method, and belongs to the technical field of carbon fiber reinforced composite material forming. The mold solves the problem that a common mold does not reserve space for a rubber heat insulation layer of an extension part, it is difficult to prepare the shell through fiber forming, and the rubber heat insulation layer causes a negative angle to be formed in the mold, thereby causing the problem of demolding difficulty. The mold comprises a mandrel and a mold main body. The mold main body is a spliced structure, and comprises a first mold and a second mold. The first mold is provided with a concave splicing surface, and the second mold is provided with a convex splicing surface. When the first mold and the second mold are spliced and fixed, the inner regions of the concave splicing surface and the convex splicing surface are mutually attached to realize axial positioning, and the edges of the concave splicing surface and the convex splicing surface are mutually separated to form a gap extending in the direction of the mandrel and in a circumferential ring shape. The mold is mainly used for manufacturing a composite shell with a special-shaped rubber layer.

The utility model discloses a top cover assembly and a battery, and relates to the technical field of power batteries. The top cover assembly comprises a cover plate, a pole, a sealing ring and upper plastic, a first through hole penetrating through the cover plate is formed in the cover plate, a bulge is annularly arranged on the cover plate in the circumferential direction of the first through hole, and an extension part extending inwards is arranged on the inner wall of the bulge; the pole is arranged in the first through hole in a penetrating manner; at least one of a first annular table and a second annular table which are formed after pressing riveting is arranged on the side wall of the pole; the sealing ring is arranged on the second annular table in a sleeving mode and abuts against the inner wall of the first through hole and the extending part; the upper plastic cement is annular, the upper plastic cement is arranged on the pole in a sleeving mode and wraps the protrusion, the upper plastic cement is provided with a filling part partially stretching into the position between the first through hole and the pole, the filling part is located between the first annular table and the second annular table, and the first annular table abuts against the upper portion of the filling part. The top cover assembly solves the technical problem that a sealing ring in an existing top cover assembly is prone to failure.

The invention relates to the technical field of motor equipment, and discloses a motor rotor and a rotor vibration control method, the motor rotor is used for being installed in a stator of a motor, and the motor rotor comprises an iron core and a permanent magnet; the number of the iron cores is multiple, and the multiple iron cores are sequentially stacked together. A mounting hole is formed in the center of the iron core, and a rotating shaft is fixed in the mounting hole in a penetrating manner; the iron core is provided with a plurality of magnetic slots; the multiple magnetic grooves are distributed in the circumferential direction of the mounting hole in a surrounding mode. The number of the permanent magnets is in one-to-one correspondence with the number of the magnetic slots; the permanent magnets are clamped in the magnetic slots; the outer circle of the iron core corresponding to the interval area of every two adjacent magnetic grooves is a plane. Electromagnetic noise and vibration of the motor are obviously reduced from the source, and running quietness is improved. And the torque pulse generated when the rotor rotates is reduced.

This utility model relates to a manual peeler for easily peeling the oxygen barrier layer of oxygen-barrier plastic pipes. It solves the technical problems of existing traditional peeling knives easily damaging the pipe body. It includes an annular cylinder with a movable upper ring and a lower ring. The annular cylinder has a pipe installation cavity on its inner circumferential side, and several pipe limiting grooves are provided on the outer circumferential side of the pipe installation cavity. A ring-cutting knife assembly is installed within the pipe limiting grooves. An axially arranged sliding groove is provided on the outer side of the annular cylinder, and a straight-cutting knife assembly that moves along the length of the sliding groove is provided within the sliding groove. A blade depth adjustment device is provided on the outer side of the annular cylinder to allow the straight-cutting knife assembly to move along the direction of the annular cylinder into the pipe installation cavity. The advantages are: it adopts an annular openable and closable structure, and through the cooperation of axial straight-cutting and circumferential ring-cutting double blades, operation only requires pushing and pulling to cut open the oxygen barrier layer and then rotating once to peel it off. At the same time, the depth of the straight-cutting blade can be precisely controlled by the blade depth adjustment device, thereby improving peeling efficiency and avoiding damage to the pipe body.

The utility model provides an indoor skirting board fixing piece which comprises a first butt joint cylinder horizontally arranged on the side, close to an embedded groove, of a skirting board, and a second butt joint cylinder capable of being connected to the outer side of the first butt joint cylinder in a matched and sleeved mode is arranged in the embedded groove. A butt joint column capable of being inserted into the first butt joint cylinder in a matched mode is concentrically arranged on the inner side of the second butt joint cylinder. At least one positioning block capable of moving in the radial direction is elastically arranged on the inner side of the first butt-joint cylinder, and a groove matched with the positioning block in a positioning mode is formed in the outer side of the butt-joint column in the circumferential direction in a surrounding mode. During installation, the skirting board is horizontally transferred to the embedded groove, so that the first butt joint cylinder is inserted into the second butt joint cylinder, the butt joint column is inserted into the first butt joint cylinder, and the positioning block enters the groove. The first butt joint column is provided with an unlocking assembly capable of releasing the positioning state between the positioning block and the groove. According to the utility model, the skirting board can be conveniently and efficiently disassembled and replaced on the wall body only by simply pressing and pulling the skirting board, and the installation is stable and reliable.

The utility model discloses a diaphragm piece and a diaphragm pump, comprising a first diaphragm, a second diaphragm and a third diaphragm, the convex ring is arranged on one end face of the diaphragm body and is close to the edge of the diaphragm body, and the convex ring is annularly arranged in the circumferential direction of the diaphragm body; the end face, provided with the protruding ring, of the diaphragm body is a plane. By the adoption of the structure, the sealing performance of the diaphragm piece after the diaphragm piece is installed on the diaphragm pump can be effectively improved, and the diaphragm piece is simple in structure and convenient to manufacture.

The invention relates to a postoperative anti-regurgitation self-cleaning drainage tube which is suitable for chest drainage after pulmonary lobectomy. In order to solve the problems that a traditional drainage tube depends on gravity to conduct passive drainage, a tube cavity is prone to forming a biological membrane due to sediment to cause blockage and drainage efficiency is insufficient, a plurality of cilia are arranged on the inner wall of a drainage tube body in a surrounding mode in the circumferential direction, the sizes of the cilia are gradually reduced from the root to the top end, and the elasticity modulus is reduced in a gradient mode in the drainage direction; and the vibration device is matched to drive the cilia to swing directionally in the same direction as the drainage direction. According to the design, by simulating the respiratory tract cilia function and utilizing the synergistic effect of cilia structural characteristics and vibration excitation, tube wall sediments are actively and physically stripped, a biological membrane is destroyed to form a foundation, and meanwhile, cilia directionally swings to form drainage auxiliary thrust. According to the application, the occurrence rate of lumen blockage can be obviously reduced, the drainage efficiency is improved, the postoperative pain and medical cost of a patient are reduced, the recovery period is shortened, and the clinical efficient drainage and anti-blockage requirements are met.

An endovascular prosthesis includes a stent having a plurality of radially expandable circumferential rings arranged along a longitudinal axis with a circumferential gap between the plurality of radially expandable circumferential rings. At least some of the expandable rings include cells comprising struts joined by a crown, and at least some of the cells or a midpoint in the struts of the cells has a radius R measured from the longitudinal axis of the stent, and a midpoint in a gap between circumferentially adjacent cells has a radius r measured from the longitudinal axis of the stent. After the stent radially expands up to 200% from the delivery radius, the outer surface of the stent maintains a roundness of at least 97% measured at r / R * 100, and the stent is configured to radially expand in situ from the delivery configuration to the deployed configuration in the target blood vessel.

A water stop member includes an annular main body to be coaxially engaged with a flange surface at an assembly completion position with a base member, an annular outer circumferential lip that is coaxially protruded from an inner circumference portion of a main body toward a circumference portion, elastically deforms at an attachment completion position, and is brought into close contact with an annular plane of the circumference portion over one circumference, an annular inner circumferential lip that is coaxially arranged at a position closer to a cylindrical portion side than the outer circumferential lip, and is brought into close contact with the annular plane over one circumference at the attachment completion position, and a connection member.

This invention provides a sheath core and a delivery device. The sheath core includes a pushing part, a loading part, and a guide head along the axial direction. The pushing part is disposed near the proximal end of the sheath core, and the loading part is disposed near the distal end of the sheath core. The guide head is connected to the distal end of the loading part. The loading part includes multiple winding wires, which are arranged in a circumferential ring and spirally extended in the axial direction to form a hollow tube structure. The sheath core with the winding wire structure can have better flexibility, which is more beneficial for the delivery of stents in tortuous blood vessels. In order to solve the problem of unraveling of the winding wires, a stent mounting part is provided near the distal end of the loading part. The outer wall of the stent mounting part is provided with an attachment. The attachment keeps the multiple winding wires in a tight arrangement in both the natural and tortuous states. The attachment can tightly bind the winding wires, thereby avoiding the problem of unraveling. In addition, when installing a stent with a pre-placed guide wire, the pre-placed guide wire can be prevented from embedding.

The invention relates to the technical field of combined milling cutters, and discloses a multipurpose combined milling cutter which comprises milling cutter heads, milling cutter bars and a loading disc, the milling cutter bars are fixed to the top of each milling cutter head, and a plurality of loading grooves are formed in the loading disc at equal intervals in a circumferential surrounding mode; a rotatable assembly rotating plate is arranged in each loading groove, a connecting sleeve is rotationally connected to each assembly rotating plate through a damping bearing, a detachable milling cutter bar is loaded in each connecting sleeve, and a driving assembly is rotationally connected to the milling cutter head and used for driving the milling cutter bar to rotate; according to the invention, through the plug-in type limiting structure, during assembly, the milling cutter bar is limited through the fixing pin strip, and when any milling cutter in the milling cutter combination needs to be replaced, the milling cutter can be detached by pressing the lock rod so as to replace other types of milling cutters, so that the convenience of replacing the milling cutter in the machining process is greatly improved, and more time and labor are saved.

This invention discloses a zero-error roundness centerless grinding device with online closed-loop dimensional measurement and control, belonging to the field of precision bearing grinding technology. Addressing the industry pain points of traditional grinding machines worldwide—namely, inherent roundness errors due to eccentricity and uneven loading, lack of end-to-end online precision control, and poor batch consistency—this invention employs a double-symmetrical rigid fulcrum to permanently lock the workpiece center. Combined with a power mechanism driving the workpiece to rotate concentrically, the grinding wheel performs symmetrical and balanced grinding around the circumference. Simultaneously, a high-precision dimensional measuring head collects workpiece parameters in real time and provides closed-loop dynamic compensation for grinding deviations. The device achieves alignment of the workpiece's rotation, geometry, grinding, and inspection centers, completely eliminating elliptical, angular, and radial runout errors at their structural root, achieving theoretically zero roundness and ultra-high precision machining. The equipment exhibits excellent rigidity, low operating vibration, and extremely high batch processing stability, filling the global gap in zero-error grinding technology for precision rotating parts under extreme working conditions.

The subject of the invention is a waste container with a container closing mechanism. The waste container comprises a tank (1), a cap (2) and a detachable cover (3) with a rotating drum (6) and a handle (16) connected to the drum (6) and the drum (6) has a chamber (7) with an inlet / outlet opening (8). The lateral surface of the drum (6) has a head (18) of variable thickness, and the cover (3) has a catch (5) attached, the catch (5) has a lever (19) in its upper part. Under the lever (19), the catch (5) has hooks (20) rotatably connected to the inner splines (21) of the cover (3). The lower portion of the catch (5) also comprises an overrun surface (23) and a catching surface (24). On its inner wall, the tank (1) has at least one catching head (28) with a lateral surface (27). The cap (2) has at least one catching head (28a) in each through cut-out (26). The method of operation of the waste container closing mechanism, wherein the waste container is assembled by applying the cap (2) to the top of the tank (1), the bag (25) is inserted into the tank (1), the cover (3) is attached to the tank (1) through the cap (2) by means of the catches (5), thus the external surface (29) of the drum (6) presses the upper wall of the bag (25) to the inner surface of the circumferential ring (10) of the cap (2), and then the bag (25) is filled with waste, the handle (16) is rotated downwards to resistance and then the head (18) is progressively pressed against the lever (19) located in the upper part of the catch (5) and as a result of rotation of the catch (5) it is extended from the catching head (28) of the tank (1) to the catching heads (28a) of the cap (2), the cover (3) with the filled bag (25) is lifted, the bag (25) is pulled out through the inlet opening (11) of the cap (2), the lower part of the catches (5) is opened outside the catching heads (28a) and the cap (2) is freely disconnected from the cover (3).

The utility model provides an electrode interface of a muscle stimulator, which relates to the technical field of electrode interfaces and comprises an electrode interface body. The electrode interface body is provided with a butt joint anti-falling device in the left-right direction, the center of the butt joint anti-falling device is provided with an inner threaded cylinder in the left-right direction, four rightward L-shaped elastic pieces are arranged on the outer circumference of the inner threaded cylinder of the butt joint anti-falling device in an annular array mode, and triangular clamping blocks are arranged on the inner end faces of the right ends of the L-shaped elastic pieces of the butt joint anti-falling device. The right side of an internal thread cylinder of the butt joint anti-falling device is provided with a stimulator guide column in the left-right direction through threads, so that the butt joint anti-falling device is conveniently installed on a stimulator through the stimulator guide column, the stimulator guide column is conveniently connected with a stimulator circuit, and a wire protection cylinder is conveniently inserted into the butt joint anti-falling device to achieve butt joint anti-falling. The problems that the butt-joint state of the electrode interface cannot be effectively determined, so that the butt-joint stabilizing effect of the electrode interface is poor, and butt-joint measures are inconvenient to add on the electrode interface to determine the butt-joint state and maintain the butt-joint stability are solved.

The utility model provides a feeding mechanism of a blow molding machine, which relates to the technical field of feeding mechanisms of blow molding machines and comprises a mechanism body. The mechanism body is provided with a material temporary storage hopper, threads are arranged on the outer circumference of the top of the material temporary storage hopper, a funnel is arranged at the bottom of the material temporary storage hopper, threads are arranged on the outer circumference of the lower end of the funnel of the material temporary storage hopper, and a limiting ring plate is arranged on the outer circumference of the lower end of the funnel of the material temporary storage hopper. Rotating grooves are formed in the outer circumference of a limiting annular plate of the material temporary storage hopper in an annular array mode, and a strip-shaped hole penetrating left and right in the front-back direction is formed in the left side wall of the lower end of a hopper of the material temporary storage hopper, so that a port sealing plate is conveniently inserted into the lower end of the material temporary storage hopper, and communication between the material temporary storage hopper and a material feeding barrel is conveniently separated through the port sealing plate; the problems that due to the fact that the material hopper and the feeding cylinder are in a through normally-open type, materials cannot be temporarily stored in the material hopper, and sealing measures are inconvenient to be additionally arranged on the material hopper to seal an opening in the bottom of the material hopper are solved.

An implant is provided for use at a native cardiac valve of a subject. The implant has a central axis and a frame that, in an implanted configuration, defines a circumferential ring of spiked cells around the central axis. Each spiked cell has four corners consisting of an inner apex, two lateral corners connected, at respective intermediate junctions, to lateral corners of adjacent cells, and an outer apex oriented radially away from the central axis. The spiked cells are defined by struts that carry spikes. The intermediate junctions provide circumferential articulation such that each spiked cell bends with respect to adjacent cells to move its outer apex toward and away from the central axis independently of outer apices of the adjacent cells in a manner that maintains the spikes of that cell in tissue-gripping contact with tissue of the valve. Other embodiments are also described.

The embodiment of the invention provides a conjugate type gear speed reducer, and relates to the technical field of speed reducers. According to the conjugate gear reducer, two eccentric bodies are formed by eccentric shaft sleeves, a conjugate gear is made to rotate, decelerate and swing, a plurality of driven crankshafts annularly arranged along the circumference are pushed, a plurality of shaft pins of rotating bodies inserted into the two sides of a machine shell through needle bearings are eccentrically rotated, the shaft pins are pushed to synchronously rotate, and the rotating bodies on the two sides of the machine shell rotate along with the shaft pins. If rotation of the rotating bodies on the two sides is restrained, the conjugate gear can directly push the shell to rotate, and angular velocity displacement in rotation can be accurately removed. The conjugate type gear reducer can achieve high-precision positioning transmission, shorten the axial distance, reduce the manufacturing cost and further enable products to be popularized.

A nozzle for an air duct, the nozzle comprising a tube (6) made of fabric or foil, the tube (6) having an inlet opening for drawing in air from the air duct at its inlet end (2) and an outlet opening for air outlet at its outlet end (11), wherein the nozzle is provided at its outer side with a proximal circumferential ring (1a) and a distal circumferential ring (1b) arranged spaced apart from each other; and an adjustment device for adjusting the direction of the air exiting the nozzle row, wherein the adjustment device comprises an adjustment element (7) and a pair of fastening elements (4), each of the fastening elements (4) being attached to the adjustment element (7) and comprising a fastening portion (4a) comprising a saddle portion and two arms extending from the saddle portion, and the fastening portion (4a) being for detachably mounting the fastening element (4) to the circumferential ring (1a, 1b) by inserting the circumferential ring (1a, 1b) between the pair of arms of the fastening portion (4a), wherein the adjustment element (7) has an adjustable length, and by adjusting the length of the adjustment element (7) between the fastening elements (4) when one of the fastening elements (4) is mounted by its fastening portion (4a) to the proximal circumferential ring (1a) and the other of the fastening elements (4) is mounted by its fastening portion (4a) on the distal circumferential ring (1b), the degree of inclination of the outlet plane of the nozzle relative to the inlet plane of the nozzle is adjusted and locked.

A device for radially compressing a stent includes a housing and a first iris positioned adjacent the housing. The first iris includes a circumferential ring, a plurality of arms extending radially inward from the ring, and a lever extending radially outward from the ring. The first iris includes an open position recess, a closed position recess, and a guide recess formed in the ring. The device may include a second iris positioned adjacent the housing, and a spacer plate disposed between the first and second irises. The spacer plate includes first and second locking elements disposed radially inward of the outer circumference of the spacer plate. The first locking element engages with the first iris to selectively lock in open and closed positions. The second locking element engages with the second iris to selectively lock in open and closed positions. The first and second locking elements are circumferentially spaced apart.

This utility model discloses a roller-type belt bending and forming device, including a support, on which two sets of rotating rollers are arranged opposite each other, including a first rotating roller and several second rotating rollers. The first rotating roller and the second rotating rollers can rotate synchronously and in opposite directions. Each set of rotating rollers is fitted with an annular segment, corresponding to the first annular segment and the second annular segment respectively. The first annular segment and the corresponding multiple second annular segments combine to form a forming unit. The distance between the first rotating roller and the multiple second rotating rollers is consistent, and the radius of the multiple second annular segments is consistent. When the belt passes between the two sets of annular segments, the two sets of annular segments can respectively form tensile forces of different magnitudes on the two sides of the belt, causing the belt to be formed into an approximately circumferential ring. This utility model can form the belt into a circumferential wear-resistant ring, making the wear-resistant ring fit more closely to the groove it is fitted with.

The utility model relates to the technical field of welding and fixing, in particular to a welding and fixing tool for an upper cover of a compressor. A welding frame is fixed to one corner above a bottom plate, a first positioning pin is connected to one side of the welding frame, a welding support is connected to the upper portion of the welding frame and rotationally connected with a pressing arm through a rotating shaft, the top end of the pressing arm is connected with a pressing head, and a fixed support is fixed to the other corner above a pressing plate. The fixing support is vertically provided with a connecting fixing block, the fixing block is rotationally connected with a handle through a screw, one side of the handle is connected with one end of a second telescopic motor, the other end of the second telescopic motor penetrates into an overturning plate, a positioning sleeve is further embedded in the overturning plate, and a second positioning pin penetrates through the positioning sleeve and the overturning plate to be connected with the second telescopic motor. And a limiting device surrounds the center of the bottom plate circumferentially. Compared with the prior art, the fixing position of the workpiece in the welding process is accurate, vibration or displacement is reduced, manual intervention is reduced, and production efficiency is improved.

The utility model discloses an anti-loosening and anti-falling plugboard, which comprises a main shell, a surface shell and a plugboard cavity, the surface of the surface shell is provided with an adaptive groove and a jack which are adaptive to a plug, and the circumferential annular wall of the adaptive groove is provided with a tongue hole. A clamping tongue, a pressing locking assembly and a first elastic piece are arranged in the insertion plate cavity, the clamping tongue and the lock hole of the plug are in insertion fit, and the pressing locking assembly and the first elastic piece jointly act on the clamping tongue, so that the clamping tongue is inserted into the lock hole or retreats from the lock hole. According to the utility model, through the synergistic effect of a plurality of assemblies, plugging adaptive locking is realized, low operating force and high anti-loosening reliability are realized, functions of mistaken touch prevention, dust prevention, water prevention and electric signal feedback are integrated, and the problem of contradiction between the anti-loosening performance and plugging convenience of a traditional plugboard is effectively solved.

The present application relates to the technical field of mountain forest fertilization, and discloses a mountain forest tree energy-saving and environment-friendly slow-release fertilizer device, which comprises an enclosing cylinder, the enclosing cylinder is provided with an enclosing cavity, the enclosing cavity is provided with a swing ring plate, the swing ring plate is provided with an outer circumferential ring and an inner circumferential ring, the inner circumferential ring surrounds a tree base and is elastically connected with the tree base, and the outer circumferential ring surrounds the enclosing cavity in a circumferential direction and is elastically connected with the inner side wall of the enclosing cavity; the bottom of the swing ring plate is arranged in a suspended manner, the swing ring plate is provided with a storage cavity for placing fertilizer, and a plurality of fertilizer application holes are arranged in the swing ring plate; the top opening of the enclosing cavity is provided with a floating ring plate, the floating ring plate is annular, the outer side of the floating ring plate is provided with a floating outer circumferential ring, and the inner side of the floating ring plate is provided with a floating inner circumferential ring; the floating outer circumferential ring is elastically connected with the top of the enclosing cylinder, and the floating inner circumferential ring is elastically connected with the tree base; the floating ring plate is provided with a water cavity which is concave downward, and a plurality of water permeable holes are arranged in the floating ring plate; a plurality of support strips are arranged at the bottom opening of the enclosing cavity, and the inner ends of the support strips are fixedly connected with the tree base.

The application discloses a multi-point limiting and fixing magnetic resonance scanning device and relates to the technical field of magnetic resonance scanning. The multi-point limiting and fixing magnetic resonance scanning device is characterized in that the device is adapted to the physiological curved surface of the temporal part of the head through a head gravity linkage bilateral centering abutting structure, realizes bilateral synchronous uniform stress, and realizes four-limb full circumferential surface contact constraint through a circumferential embracing type clamping cylinder and an inflatable pad, the inflatable pad can be adapted to the limb contour and is expanded and attached, the traditional linear contact constraint is upgraded to full contact surface uniform constraint, small displacement shaking of a subject is comprehensively inhibited through gapless attachment, safety risks such as poor blood circulation and skin pressure damage caused by local concentrated compression are avoided through uniformly distributed constraint pressure, and the limiting reliability and use comfort are taken into account.