91 results about "Ring block" patented technology

A fixture for an electrical device includes a pin casing, a spring, a ring block and a pin. A pin casing has a trough formed from a bottom and a round-wall for containing spring and ring block. The round-wall forms at least a flange to limit ring block inside pin casing. The pin has a press portion and a wedge portion. The wedge portion passes through ring block, spring and pin casing so as to combine those together. The press portion is used for pushing the ring block to compress the spring.

The invention relates to a discontinuous deformable surgical anastomosing magnetic ring. The discontinuous deformable surgical anastomosing magnetic ring is provided with two magnetic ring bodies, wherein the magnetic ring bodies are the same in structure and opposite in magnetic poles and are arranged in a piling up manner; each magnetic ring body comprises a plurality of arc-shaped magnetic ring blocks and a plurality of connecting pieces; the arc-shaped magnetic ring blocks are movably connected in an end-to-end manner by the connecting pieces respectively through rivets so as to form the magnetic ring bodies; a plurality of discontinuous anastomosing gaps are formed in the upper surfaces of the arc-shaped magnetic ring blocks of one magnetic ring body; a plurality of discontinuous anastomosing gaps are formed in the lower surfaces of the arc-shaped magnetic ring blocks of the other magnetic ring body; the connecting pieces of the two magnetic ring bodies arranged in a piling up manner are oppositely arranged; and the discontinuous anastomosing gaps of the two magnetic ring bodies are arranged in an abutting manner so as to form a discontinuous anastomosing port. The discontinuous deformable surgical anastomosing magnetic ring is light in weight and large in magnetic force, is deformable, and can be easily discharged from a human body, the stability and the involutory accuracy of the magnetic ring are enhanced, and the magnetic losses are reduced; and the discontinuous deformable surgical anastomosing magnetic ring has the characteristics of surgical discontinuous anastomosis, and pressure gradients can be locally formed at the anastomosing port further, so that the tissue healing is better, and the discontinuous deformable surgical anastomosing magnetic ring can be applied to the fields, such as PPH (Procedure for Prolapse and Hemorrhoids), rectal low-order anus-preserving operation, circumcision, colostomy, minimally invasive endoscopic resection and anastomosis, and the like.

The invention discloses a bolt loading ring-block type corrosive wear testing machine. The testing machine comprises a frame, a bolt loading system, a friction measuring system, a transmission system and a crucible electric resistance furnace system, wherein the loading bolt in the bolt loading system is arranged on a hanger bearing connection component, a loading rod is fixedly connected with a positive pressure loading main force hinge base; and a pressure sensor in the friction measuring system is fixed on the frame, and a sample block is arranged on the lower part of the loading rod to press an annular sample. The loading bolt of the testing machine is tightened to apply a load and withstand a force sensor, the positive pressure loading main force hinge base and the loading rod are used to amplify the load. The testing machine uses the annular sample and the sample block as the friction pair and uses liquid metal as the corrosion medium, and can stimulate the corrosion and wear behaviors of the solid friction pair in liquid metal, change the test parameters of load, temperature, rotate speed and the supply of liquid metal and measure the friction; and the load is applied accurately and the measurement accuracy is high.

The invention relates to a novel wide-band omnidirectional antenna; a main feeder (6) of the invention feeds power to a main element which comprises an upper element (12) and a lower element (13); the invention is characterized in that lower ports (32) of the upper element (12) and the lower element (13) are short-connected together and a plastic fixed small plate (5) is arranged between the ports; a hollow copper tube (4) perforates between the main elements; an inner layer sleeve (8) and an outer layer sleeve (7) are respectively sheathed at the outer side of the copper tube (4); and two layers of dielectric ring blocks (14) are added in the inner layer sleeve (8) of the upper element (12). The middle beginning section in the main element adopts a gradient transition form and an inclined angle between the gradient part and the central copper tube (4) is 30 degrees to 45 degrees; the thickness of the dielectric ring block (14) is adjustable and the distance between the two layers of the dielectric ring blocks (14) is also adjustable.

The invention discloses a housing structure of a DPMU distribution network synchronous phasor measuring device. The housing structure comprises an upper housing assembly, a lower housing assembly, anda measuring housing assembly. The upper housing assembly includes a first latch, a second latch, two bolt rings, an upper housing waterproof sheet, an upper housing rubber gasket, and an upper housing adhesive piece. The lower housing assembly includes a lower housing, a lower housing adhesive piece, and a lower housing rubber gasket. The measuring housing assembly is connected with the lower housing assembly by a bolt. One end, fitting the lower housing assembly, of the upper housing assembly is fixed by the first latch to form a movably opening-closing integrated part; and the other end ofthe upper housing assembly passes through latch rings of two bolt rings by the second latch. After the bolt rings rotate downwardly at an angle of 180 degrees, screwing rings of the bolt rings block the edge of the lower housing; the screwing rings are rotated clockwise and thus semi-circular wire slots of the upper housing and the lower housing form a concentric circle; the rubber gaskets are closed up and down to clamp the wire and the wire is separated from the housing. The housing structure is suitable for installation of wires with various diameter specifications at a 10-kV overhead line.

The invention discloses an engine high pressure turbine clearance value correction method, and belongs to the technical field of aero-engine high pressure turbine clearance measurement analysis. Firstly the coordinates of center of circle O1 and O2 of the front and rear pivots of an engine high pressure turbine rotor on the same axial projection surface are acquired so that the coordinates of center of circle O3 of an axial blade center are determined; and then the coordinates of center of circle O4 of a high pressure turbine external ring block are acquired, circumferential distribution of all the external ring block jump values relative to the coordinates of center of circle O4 is drawn, and finally vector translation is performed on the circumferentially distributed external ring block jump values relative to the coordinates of center of circle O4 through a space vector O4O3<rightarrow> so that corrected engine high pressure turbine clearance value distribution is acquired. Association analysis of the rotor and stator diameter is performed according to the proportional position of the center of the high pressure turbine rotor between the pivots of the high pressure rotor and the relative position vector of the center and the high pressure turbine external ring center in the space so that the calculation result is more accurate and the circumferential distribution situation of the engine turbine clearance can be visually reflected.

The invention discloses an air-supported rib distraction device for thoracic surgeons, which comprises an arc-shaped plate, a silica gel gasket, a connecting block, a push rod, a limit ring, an air guiding connector, an air guiding tube, a control valve, and a through hole , cylinder, ring block, shadowless lamp, piston, blood vessel and arc groove. The invention has reasonable structure, increased use functions, is convenient to pull apart the ribs on both sides of the incision, is beneficial to increase the field of vision of the doctor's operation, and is convenient for extracting the blood accumulated in the incision and illuminating the inside of the incision. , which is conducive to the smooth progress of the operation. The gas in the cylinder between the two pistons generates a thrust on the piston, so that the push rod installed on the piston expands to both sides of the cylinder, and drives the arc-shaped block to expand to both sides, so as to stretch the ribs By starting the blood pump, the blood accumulated inside the incision is pumped into the blood bag through the blood vessel, which reduces the influence of blood on the operation.

The invention discloses an avoidance buffering energy-absorbing anti-impact anchor rod. The anchor rod includes a rod body, a tray, a constant resistance device and a nut; the right end of the rod body is provided with an external thread block, an external block is arranged on the external thread block, the external thread block and the rod body adopt integrated manufacture, the center of the trayis provided with a rod body installation hole, the rod body passes through the installation hole formed at the center of the tray, and the right end of the external thread block is provided with thenut; the constant resistance device is arranged between the tray and the nut and has a thin-wall circular tube structure, the middle of the constant resistance device is penetrated, and the rod body is sleeved with the constant resistance device. The nut includes a circular truncated cone block, a circular ring block and a square block, and the left side of the circular truncated cone block is inserted into an inner hole of the constant resistance device. The avoidance buffering energy-absorbing anti-impact anchor rod can adapt to the destroying characteristic that surrounding rock rapidly deforms in the impacting process, release and conversion of impact energy can be effectively guided and controlled, high energy is consumed in the avoidance buffering process, the influence of impact dynamic load can be effectively avoided, and the stability of the surrounding rock and a support system in a tunnel is ensured.

The invention discloses a separating device of a lifting life-saving cabin, which comprises an upper cabin ring and a lower cabin ring, wherein a wedge-shaped block is arranged on the upper cabin ring, an insertion hole is arranged on the wedge-shaped block, a lower cabin ring block is arranged on the lower cabin ring and the insertion hole is further arranged on the lower cabin ring; and a baseplate and a cross ribbed plate are fixedly connected on the lower cabin ring respectively, and a separating mechanism of the life-saving cabin and a locking mechanism are connected between the baseplate and the cross ribbed plate. By adopting the separating device of the lifting life-saving cabin, reliable separation of an upper cabin body and a lower cabin body can be realized.

The invention belongs to non-powered air dust separation device in air cleaning system. It is characterized in that: when air containing moisture and mote passing through the four or five air filtering passages, which is formed with circular bar screen filtering board in dust separation device, the two circular sponge filtering ring blocks the air and the ten effective negative pressure area and six collecting ditch in U recycling tank and two or three layers of circular nonwoven filtering colth filter and clean air repeatedly. The dust removal rate amounts to 90%, and the dust size is equal to or larger than 25 um. The invention is characterized by simple and rational construction, and outstanding effect for separation and clean air containing mote particle.

The invention relates to an automatic filling sealing structure for a high-pressure valve, which comprises a valve rod filling box body, a valve rod, a filling assembly and a support plate, wherein a difference pressure ring block in a step shaft sleeve structure is coaxially arranged on the valve rod arranged between the support plate and the filling assembly in the filling box body, a gap is formed between the upper plane of the step of the difference pressure ring block and the radial matched surface made in the filling box body, a waveform elastic element is coaxially pressed on the valverod arranged between the difference pressure ring block and the support plate, the filling assembly is coaxially arranged on the valve rod arranged in the filling box body at the inner side of the difference pressure ring block and sequentially comprises a filling pad, woven forming fillings, a filling separation sleeve and forming press ring fillings from top to bottom, the woven forming fillings, the filling separation sleeve and the forming press ring fillings are fixedly assembled. The sealing can be automatically formed under the medium pressure effect, the structure is simple, the effect is obvious, the sealing reliability of the movable sealing position of the valve rod is greatly improved, the filling abrasion can be automatically compensated through the structure, and the sealingpressure of the fillings in the use process is maintained.

The invention discloses a panoramic ring projection objective based cylindrical structured light projection device. The projection device includes a projection light source, a structured light emitting device, a panoramic ring projection objective and an image processor which are in coaxial and successive arrangement; the image processor maps a planar structured light pattern into a ring structured light pattern to output to the structured light emitting device to perform display; the panoramic ring projection objective accords with a cylindrical imaging law, projects cylindrical structured light, and consists of an aberration balance lens set and a panoramic ring block unit lens set which are in coaxial arrangement; and the panoramic ring block unit lens set converts paraxial rays into large visual field off-axis rays. The projection device can realize cylindrical panoramic structured light projection, so that the projection range of structured light can be significantly enlarged, thesurface image features of surrounding objects can be effectively enhanced, and convenient image matching and three-dimensional reconstruction coding and decoding can be realized; through the adoptionof single display module and single projection lens modes, crosstalk problems of multi-source structured light projection can be avoided; and the device is simple in structure, light in weight and controllable in cost.

The invention discloses a drainage phlegm eliminating device used for ICU patient nursing. The main points of the technical scheme are as follows: including the rack, A sputum box is mounted on the rack through the mounting part, A sputum box is provided with a cleaning opening, the sputum box is inserted and connected with a blockage at the cleaning mouth, the top end of the sputum box is also communicated with a rigid first pipe, the first pipe is communicated with a rigid branch pipe, the lower end of the branch pipe communicating with the first pipe, the branch pipe is provided with an electromagnetic one-way valve, the branch pipe is connected to the barrel at an end remote from the first pipe, A loop block is slidably connected with that inside of the tube along the axis of the tube,A screw rod is threadably connected with the frame, One end of the screw rod is rotatably connected in the ring block, the first pipe is communicated with the second pipe through a connecting part atone end far away from the sputum box, and one end of the second pipe is provided with a nipple made of polypropylene. The device for draining and removing phlegm for ICU patient care has the advantages of simple operation in the phlegm removing process.

The invention provides a biopsy rotary cutting device, which comprises a dynamic sealing structure arranged on the outer side of an inner cutter tube; the dynamic sealing structure forms a cavity outside the inner cutter pipe; a sealing ring is arranged in the dynamic sealing structure; the cavity comprises a first cavity and a second cavity; an auxiliary pipe is arranged outside the inner cutterpipe; the auxiliary pipe is provided with a circulation structure; when the inner cutter tube moves to a first position along the axial direction of the inner cutter tube, the sealing ring is positioned at the outer side of the auxiliary tube, and the first cavity and the second cavity are communicated through the circulation structure; when the inner cutter tube moves to a second position along the axial direction of the inner cutter tube, the sealing ring is positioned at the outer side of the inner cutter tube, and the sealing ring blocks the first cavity and the second cavity. According tothe biopsy rotary cutting device, the atmosphere can be introduced to form the circulating airflow with better suction strength; the circulating airflow can more efficiently send the rotary-cut tissue of the corresponding position to a sample collector at the rear end, so that the sample yield is effectively improved.

The hinge comprises an axial rod with a torsion spring, a cam, a middle drum up-press spring, a sleeve coated on torsion spring with one end extending a convex arm inserted with said block end, and a card; Wherein, the cam comprises a cam end with end surface protruding peak, a block end, and a middle drum connected two ends; radiating spokes outward from one end of axial rod to prop on cam end and a sleeve with ring block slot from another end of axial rod; blocking the sleeve by card in the slot; fixing one end of torsion spring on axial rod and another end on sleeve. This invention forms an integer with stable structure.

This invention relates to block non-crystal magnetic core process method by use of copper module forging, which comprises the following steps: matching formula as the proportion by use of vacuum furnace for metalizing; then putting the parent alloy into sense furnace for melting to spray into copper module through copper forging to get non-crystal alloy ring block; by use of this invention magnetic core, it directly shapes by forging with good surface property through simple process.

The invention discloses a gas sealing device which comprises a gas storage tank; a sealed cover is arranged at the top of the gas storage tank, and comprises a gas inlet pipe, an upper cover, fixing screws and a lower cover; the gas inlet pipe is arranged at the top of the upper cover; the fixing screws are symmetrically arranged on the left side and the right side of the upper cover, the bottom of each of the fixing screws penetrates through the upper cover and is in threaded connection with the gas storage tank; the lower cover comprises a rubber ring, a ventilation ball and a fan ring block; the ventilation ball is connected with an inner ring of the fan ring block; an outer ring of the fan ring block is connected with the rubber ring; the ventilation ball comprises a first ventilating opening, a connecting belt, an outer ventilation ball, an inner ventilation ball and a second ventilating opening. According to the gas sealing device disclosed by the invention, by the comprehensive use of a buffer and a buffer spring, the safety guarantee of production is enhanced; by using the buffer, the gas storage tank is protected, so that the service life of the gas sealing device is prolonged; by using a manometer, a user can observe the situation of gas pressure in the gas storage tank at any moment.

The invention relates to the technical field of antennas, Specifically, the invention relates to a dual-broadband and dual-polarization omnidirectional ceiling antenna, comprising a circular table frame cover, a sponge strip, a ji-shaped strip plate, a timing switch, a cylindrical slot, a motor, a battery, an antenna body, a Z-shaped support plate, a bearing circular plate, an arc cavity, an arc magnetic plate, an arc bayonet, a limiting ring block, a screw, a circular seal plate, an externally threaded pipe, a network connecting wire, an internally threaded ring, a barb, a movable pin and a groove. The invention adopts the clamping connection structure instead of the screw fixing connection, facilitating removal of the antenna body without the removal of the screw tool, it is advantageousto change the installation method flexibly according to the situation, so that it is strong in firmness, The invention realizes the function of intermittently and regularly cleaning the dust, which is advantageous to dust cleaning of the whole antenna shell surface, and is advantageous to dust cleaning of the whole antenna shell surface through the rotating sponge strips which are abutted on thesurface of the round table frame cover and the size of the cross section structure of the multi-shaped strips is larger than the size of the cross section structure of the round table frame cover, thereby facilitating dust cleaning of the whole antenna shell surface.

The invention relates to a multipurpose damping table board. The multipurpose damping table board comprises a platform, an inner ring block, an outer ring block, horizontal springs and pre-tightening bolts; a protruding column is arranged at the lower end of the platform and sleeved with the inner ring block; the outer ring block is arranged at the lower end of the platform, the pre-tightening bolts are horizontally screwed into the outer ring block, one ends of the horizontal springs are fixed in the inner ring block, and the other ends of the horizontal springs are fixed to the pre-tightening bolts; the damping table board further comprise a base, an adjusting bolt and a vertical spring; the protruding column is arranged at the upper end of the base, and the adjusting bolt is vertically screwed into the base; and the upper end of the vertical spring is fixed to the inner wall of the protruding column, and the lower end of the vertical spring is fixed to the upper end of the adjusting bolt. The damping table board is good in damping effect, simple in structure and convenient to use and belongs to the technical field of table and chair table surface damping.

The invention discloses a fire foam fire extinguishing device for firefighting convenient to move. The device comprises a metal protection tank and an elastic buffer protector; when a folded metal pull rod, consisting of a folded arc upper rod, a fixed bolt and a folded lower rod, is placed in a smaller area, the fixed bolt can be loosened, so that the folded arc upper rod can be freely rotated; after the folded arc upper rod is rotated to a proper position, the fixed bolt can be fixed, so that the placing area is reduced; through an elastic buffer protector consisting of an elastic protectionouter shell, a metal connection inner ring block and a metal powerful spring, an excellent protection effect can be achieved, and the collision strength can be preferably buffered for protection; through a rotating fixed buckler consisting of an arc metal block, a rubber friction pad, a fixed support block and a thread rotating column, the installation is more convenient; and during installing, the rotating fixed buckler can be rotationally fixed on the fixed support base through the thread rotating column.

A ring-block friction wear testing machine comprises a machine body, a power driving device, a main shaft, a ring-block friction pair and a radial loading device, wherein a test ring in the ring-blockfriction pair is mounted on the main shaft; the power driving device drives the main shaft to drive the test ring to rotate; a force measuring device is arranged between the radial loading device andthe ring-block friction pair; the force measuring device mainly comprises a sample holder, a tension sensor, a hinge rod and a pull rod holder which are sequentially connected; the hinge rod is rotationally connected with the pull rod holder; the pull rod holder is fixed to the machine body; a test sample is mounted at the lower part of the sample holder; the test sample contacts with the test ring to form the ring-block friction pair; a medium channel for providing different lubricating media for the ring-block friction pair is formed in the sample holder; a loading end of the radial loadingdevice acts on the sample holder to perform radial loading and quantitative adjustment on the ring-block friction pair. The ring-block friction wear testing machine can accurately measure friction ofthe ring-block friction pair in real time, and can accurately simulate friction pair lubricating conditions under various actual working conditions.

The invention relates to the technical field of medical instruments, and discloses a positioning puncture device for cardiology department surgery. The positioning puncture device comprises two groups of fixing blocks and sleeving ring blocks which sleeve the fixing blocks and can slide up and down, and the sleeving ring blocks are rectangular blocks with hollow interiors. When the integral device performs a surgery on a patient, connecting bottom plates at the bottoms of the two groups of fixing blocks can be fixedly connected with an external bed body mechanism in a threaded mode through fixing screw rods and second external threads, so that a puncture needle at the bottom of a puncture rod can be adjusted and shaken through a movable adjusting ball, and the bottom of the puncture needle is aligned to the surgical position of the patient; and the angles of the puncture rod and the puncture needle on the movable adjusting ball are fixed and limited, the puncture rod has certain stability, the puncture rod is extruded in the movable adjusting ball to drive the puncture needle to perform a surgery on the patient, so that the stability of the puncture rod and the puncture needle is ensured, and the operation risk of the patient is reduced.

The invention discloses a marine flexible pipe coupling structure. The structure comprises a coupling cell, a seal ring, a wedge-shaped block and a flange extrusion ring block. The coupling cell comprises a left flange connecting end and a right flexible pipe connecting end which are integrally formed. The right flexible pipe connecting end further comprises an inner sleeve and an outer sleeve. Acavity with a right circular ring shape communicating with a middle taper ring shape is formed between the inner sleeve and the outer sleeve. The inner sleeve is sleeved with the connecting end of a flexible pipe. The seal ring is located inside the bottom of the middle taper ring shape of the cavity and sleeves the connecting end of the flexible pipe. The wedge-shaped block is tightly connected with the seal ring, is located inside the middle taper ring shape of the cavity and sleeves the connecting end of the flexible pipe. The flange extrusion ring block is tightly connected with the wedge-shaped block and sleeves the connecting end of the flexible pipe, and the portion, located on the left side of an intermediate flange, of the flange extrusion ring block is located inside the right circular ring shape of the cavity. The intermediate flange of the flange extrusion ring block is relatively fixed to the end surface of the outer sleeve. The marine flexible pipe coupling structure is simple in structure, convenient to produce and mount and good in sealing performance at the same time.

The invention relates to an insect trapper. A supporting rod insertion hole is formed in the center of the bottom of a bottom cylinder, a central positioning stand column is fixedly mounted at the position, which corresponds to the supporting rod insertion hole, of a bottom plate of the bottom cylinder; the central positioning stand column is of a cylindrical hollow structure; the bottom of the central positioning stand column communicates with the supporting rod insertion hole; a cover body is movably mounted on the top of the central positioning stand column; a supporting ring is fixedly mounted on the inner wall of the bottom cylinder; a leaking hole disc sleeves the outer side of the central positioning stand column and positioned above the supporting ring; and an attractant carrying sponge ring block sleeves the outer side of the central positioning stand column and positioned above the leaking hole disc. The trapping and killing effect of an attractant can be improved, and an insecticidal effect of the attractant can be maintained for a long time. Moreover, the insect trapper is simple in structural design and low in integral design cost, can be popularized and used, and plays a positive and important role in green prevention and control of tobacco production, accurate pesticide application and reduction of pesticide consumption at present in China.

The invention discloses a device for optical driver component assembly. The device comprises a workbench; a cavity is arranged in the workbench; sliding cavities are arranged at the two ends of the cavity respectively and are internally provided with sliding blocks respectively; each sliding block is fixed with a clamping frame; the two clamping frames are oppositely arranged and are provided withframe clamps used for clamping an optical driver frame, optical driver clamps used for clamping an optical driver and floppy drivers used for clamping a floppy driver respectively; the workbench is internally provided with a column cavity and a cavity passage used for communicating the column cavity and a cavity; a column block is connected to the interior of the column cavity in a sliding mannerand is internally provided with a vertical cavity; a vertical block is connected to the interior of the vertical cavity in the sliding manner; a pressure block is hinged to the upper end of the vertical block; a recessed cavity is arranged at the upper end of the column block and is internally provided with a ring groove; the ring groove is internally provided with a ring block in the sliding manner; a gear ring is arranged on the protruded side of the ring block; the recessed cavity is internally provided with a gear which is engaged with the gear ring; and the vertical block is provided with a rack. Compared with the prior art, the device for optical driver component assembly is simple, convenient and rapid in operation process, saves time and labor and can effectively solve the problemof poor quality of the assembled optical driver.

The invention discloses a puncture positioning device for a breast surgery, and relates to the technical field of medical instruments. The puncture positioning device for the breast surgery comprisesa positioning main body; a positioning fixing ring block is fixedly installed at the bottom of the positioning main body; six sets of inserting grooves are annularly formed in the side wall of the positioning main body, and scale adjusting equipment is arranged at the top of the positioning main body; an air support bag is arranged on the inner side of the positioning main body, and a limiting abutting block is fixedly installed at the folded corner of the air support bag; and an auxiliary block is fixedly installed on the outer side of the positioning main body. According to the puncture positioning device for the breast surgery, when the positioning main body is inflated, the breast of a patient is supported and limited through cooperation of the air support bag, the limiting abutting block and an auxiliary massage device, and at the moment, a puncture needle is obliquely inserted into the breast of the patient through an inserting groove in the positioning main body and an adjustinggroove in an inner adjusting plate for treatment. Therefore, the effect of avoiding puncture deviation or puncture dislocation during puncture operation is achieved.

The invention discloses a drainage phlegm eliminating device for curing an ICU patient. The drainage phlegm eliminating device is characterized by comprising a frame; a phlegm box is mounted on the frame through a mounting part; the phlegm box is provided with a cleaning hole; a stopper is inserted to the part of the cleaning port of the phlegm box; a rigid first pipeline is communicated with thetop end of the phlegm box; a rigid branch pipe is communicated onto the first pipeline; the lower end of the branch pipe is communicated with the first pipeline; an electromagnetic one-way valve is arranged on the branch pipe; one end, far away from the first pipeline, of the branch pipe is connected with a sleeve; a ring block is arranged in the sleeve along the axis of the sleeve in a slipping manner; a screw rod is in threaded connection onto the frame; one end of the screw rod is rotationally connected into the ring block; one end, far away from the phlegm box, of the first pipeline is communicated with a second pipeline through a connecting part; and a mouthpiece made of polypropylene is arranged at one end of the second pipeline. The phlegm eliminating device has the advantage of being simple to operate in the phlegm eliminating process.

The invention relates to the technical field of fruit tree seedling transplanting and specifically discloses a seedling lifting device comprising a locating mechanism and a soil cutting mechanism; thelocating mechanism comprises a first supporting rod, a first locating ring block, a second locating ring block and a second supporting rod; the first supporting rod is fixedly connected with the first locating ring block; the second supporting rod is fixedly connected with the first locating ring block; each of the first locating ring block and the second locating ring block is shaped like a semicircular ring; the lower surface of each of the first locating ring block and the second locating ring block is provided with a chain wheel; each chain wheel is wound with a chain; and the soil cutting mechanism comprises a telescopic connecting rod, a connecting block, a rotating wheel and a knife shovel. The problems of high labor intensity and low efficiency in a soil cutting fracture forming process due to artificial repeated soil insertion and taking out by virtue of a shovel are solved by utilizing an annular locating block and a soil cutting machine connected to the locating block and simulating artificial repeated insertion and taking out of the shovel around a tree seedling.

The invention provides a movable elbow rotating structure, comprising a male end of the elbow body and a female end of the elbow body. The female end of the elbow body is provided with three inner trapezoidal slide grooves on a mating surface of the male end of the elbow body. The outer side wall of the male end of the elbow body is provided with outer trapezoidal slide grooves matched with the inner trapezoidal slide grooves in one-to-one correspondence. The outer trapezoidal slide grooves and the inner trapezoidal slide grooves cooperate one-to-one to form three annular chute spaces. The female end of the elbow body is respectively provided with three plug ports communicating with the three annular chute spaces, and the annular chute spaces are filled with a plurality of conical ring blocks arranged in a ring shape. Each conical ring block includes an outer annular surface slidably matched with the inner trapezoidal slide grooves, an inner annular surface slidably matched with the outer trapezoidal slide grooves, and two conical surfaces, a first conical surface and a second conical surface, connected between the outer annular surface and the inner annular surface. The movable elbow rotating structure can effectively save the cost of an elbow and prolong the service life of the movable elbow.

An improved construction of a drumshell in accordance with the present invention includes a drumshell, a ring block and a muffling block. The invention is to provide an improved construction of a drumshell with specific and unique sound characteristics for playing a variety of music.