80results about How to "Not easy to reflux" patented technology

The invention provides a sustained-release temperature-sensitive blood vessel embolic gel used for treating tumor. The sustained-release blood vessel embolic gel is prepared by entrapping a medicine by using a pharmaceutically acceptable carrier. The medicine is an anti-tumor medicine, and the pharmaceutically acceptable carrier comprises a gel prepared from poloxamer polymer, polyvinyl pyrrolidone, and the like or a composition thereof. The polymer material accounts for 5-65% of a gel mass. The particle size of the gel is in a range of 10nm to 150mum. The embolic agent is liquid gel under normal temperature, and can be used for direct injection through catheter. After injection into body, with the increase of temperature, the liquid gel is rapidly solidified into gel. Also, according to requirements, different medicines can be entrapped, and embolism and medication dual effect can be achieved through local sustained-release. Therefore, the gel provided by the invention can be used as an embolic agent for endovascular treatment, and can be used in various benign and malignant tumor transcatheter arterial chemoembolizations. The preparation method provided by the invention is simple, and is suitable for industrialized productions.

A heat exchanging tube is characterized by that on its inner surface there are discontinuous internal ribs which have a certain included angle (5-85 deg.) relative to axis of tube and are inclined intwo directions. Its advantages are high heat exchange efficiency, low flow resistance and not scaling.

The invention discloses a biological decomposable developing micro sphere typed vascular plug material, which comprises the following parts: biological decomposable material, developing material without permeating X ray and antineoplastic agent, wherein the biological decomposable material parcels the particle structure of developing material and antineoplastic agent. The invention avoids excessive damage for organic, which can do MRI examination after plugging.

The invention discloses an oily sludge advanced treatment technology which comprises the following contents: oily sludge in a raw material storage sludge-tank enters a sludge mixing tank; a demulsifier is added to carry out demulsification treatment; demulsified oily sludge enters screw-type sludge dewatering equipment to undergo solid-liquid separation so as to obtain a filtrate and sludge cake; the filtrate enters a two-phase cyclone to be separated; after two-phase separation, excess sludge at the lower layer flows back to the raw material storage sludge-tank, a mixed liquor at the upper layer is sent into a gas-liquid mixing tank to be mixed with the air and then enters a separation pond to carry out primary separation of sump oil and sewage; sump oil is recovered to a sump oil tank by the use of a sludge scraper; sewage enters a filter to separate suspended particles and residual sump oil in the sewage from water; sump oil separated from the top of the filter is recovered to a sump oil recovery tank; and sewage discharged from the filter is sent to a sewage treatment plant to undergo subsequent processing. By the technology, water content of the oily sludge can be reduced from 80-98% to about 50%, and most crude oil in the oily sludge can be recovered. Thus, sludge subsequent processing difficulty is greatly reduced. The technology provided by the invention has a wide range of application, is especially suitable for processing of oily sludge at the bottom of an oil-tank, dross and activated sludge as well as processing of various oily sludge generated from oil exploitation and storage transportation enterprises.

The invention discloses a impeller-air air-flotation device, which comprises: a tank body with closing cap on top, a aeration machine composed of a coupling shaft joint, a hollow disk and a guided blade on disk top cover board and / or its top, a chain-type scum machine, a folded guide-slag plate with front and back parts as tipping plate and middle part as plane plate, and a screw conveyor; wherein, arranging air holes on cover board of guided blade and behind its rotation direction. This invention can get rid of oil and suspended solid in variable water treatment, has high efficiency, needs low energy consumption, and can prevent volatilisation of harmful gas.

The invention provides a compressor system, an air conditioner, and an oil return control method of a compressor. The compressor system comprises a compressor, a lubricating oil separator, an electronic expansion valve, a temperature measurement unit and a control unit. The lubricating oil separator is connected with an air outlet of the compressor through a pipe for separating condensate discharged from compressor from lubricating oil, and a lubricating oil outlet of the lubricating oil separator is connected is connected with an air return port of the compressor through a pipe. The electronic expansion valve is arranged on the lubricating oil outlet of the lubricating oil separator and is used for controlling the return velocity of the lubricating oil in the lubricating oil separator by adjusting the opening angle of the electronic expansion valve. The temperature measurement unit is connected with the control unit, arranged on the compressor, and used for measuring the temperature in the compressor. The control unit is connected with the electronic expansion valve and used for controlling the electronic expansion valve to adjust the opening angle of the electronic expansion valve according to the temperature in the compressor. According to the compressor system, the air conditioner, and the oil return control method of the compressor, the opening angle of the electronic expansion valve can be adjusted freely according to the temperature in the compressor so as to ensure that the amount of the lubricating oil in the compressor is in a relatively stable state.

The invention discloses a treatment process for oily sludge. The treatment process comprises the following steps: putting the oily sludge in a raw material storage sludge basin into a sludge mixing tank, adding an emulsion breaker for emulsion breaking, putting the oily sludge subjected to emulsion breaking into a stacked type sludge dewatering machine for solid-liquid separation to obtain filtrate and mud cakes, putting the filtrate into a settling tank for settling separation, recycling waste oil discharged from the top of the settling tank, conveying the sludge at the bottom of the settling tank into the raw material storage sludge basin, feeding middle-layer mixed liquid into an air-liquid mixing tank for mixing with air to obtain a mixture, enabling the mixture to enter a separation basin for oil-water separation, recycling separated waste oil, putting sewage into a biochemical device for treatment, and discharging the sewage after the sewage meets the standard. According to the process, three-phase separation and treatment on oil, water and sludge of the oily sludge can be effectively realized, and most raw oil in the oily sludge can be further recycled; after being treated, the sewage meeting the standard can be discharged.

The invention relates to an intelligent air exchanging method and system for a bathroom and aims to solve the problem that discharged bad air returns. The intelligent air exchanging system is characterized in that a squatting pan or pedestal pan exhaust duct with a lower exhaust outlet is arranged on the rear wall of a squatting pan or a pedestal pan, a urinal exhaust duct with a lower exhaust outlet is arranged on the wall above a urinal, and the exhaust ducts discharge air through a main air duct by the aid of a fan controlled by an intelligent controller; the intelligent controller is connected with an air quality sensor in the bathroom, when the air quality measured by the air quality sensor exceeds the standard, the intelligent controller automatically turns on the fan to discharge the air, and when the air quality measured by the air quality sensor conforms to the standard, the intelligent controller automatically turns off the fan to stop the air discharge; or the intelligent controller is connected with a person sensing device, when the person sensing device senses that a person enters the bathroom, the intelligent controller automatically turns on the fan to discharge the air, and when the person sensing device senses that the person leaves the bathroom, the intelligent automatically turns off the fan to stop the air discharge in a delay manner. The intelligent air exchanging system has the advantages that energy conservation is achieved, the polluted air cannot return easily, and high air exchanging efficiency is achieved.

The invention discloses an oil sludge demulsifier and an oil sludge resourceful treatment process. The oil sludge demulsifier comprises the following components in parts by weight: 5-30 parts of fatty acid methyl ester sulfonate, 2-10 parts of alkyl polyglucoside, 0.5-2 parts of a green accessory ingredient and 58-92 parts of water. The oil sludge resourceful treatment process comprises the following steps: enabling oily sludge in a raw material storage sludge tank to enter a sludge mixing tank; adding the oil sludge demulsifier for demulsification treatment; enabling demulsified oily sludge to enter a stacked spiral type sludge dewatering machine for solid-liquid separation to obtain a filter liquor and a sludge cake; enabling the filter liquor to enter a gas-liquid mixing tank to be mixed with air; enabling the mixture to enter a separation tank for three-phase separation of oil, water and sludge. The oil sludge resourceful treatment process can reduce the moisture content of oily sludge from 80-98% to about 50%, can further recycle most crude oil in oily sludge, and greatly reduces the difficulty of sludge follow-up treatment. By combining the oil sludge demulsifier with the oil sludge demulsification process, the moisture content of oil sludge can be reduced from 80-98% to about 50%, most crude oil in oil sludge can be further recycled, and the difficulty of sludge follow-up treatment is greatly reduced.

The invention discloses a method for reinforcing heat convection between flat plates by incontinuous array diclinic diagonal ribs, which belongs to the technical field of heat convection between rib reinforced flat plates. The technical proposal of the method is that a series of incontinuous prismatic ribs which have certain included angles with the flow directions of fluid between the flat plates and inclines towards two directions are arranged on surfaces of the flat plates involved in the heat convection; protrusions and debosses are formed on two sides of the flat plate surface respectively; and the ribs on the adjacent flat plates are arranged crossly along the surfaces of the flat plates vertically, so as to form arrayed incontinous diclinic diagonal ribs. The method has the advantages of obvious function of reinforcing heat transfer, smaller flow resistance, and simple mould, and better scale resistance function; and compared with the prior art for reinforcing heat exchange fins / plates, the method also has the advantages of low processing and manufacturing cost, good applicability, and the like.

The invention discloses an oil-containing sludge resourceful treatment technology, which comprises the following steps: oil-containing sludge in a raw material sludge storage pond is introduced in a sludge mixing tank for demulsification treatment, the oil-containing sludge after demulsification is introduced in a spiral sludge dewatering machine for solid-liquid separation to obtain a filtrate and mud cakes, the filtrate is introduced in a gas-liquid mixing tank for mixing with air, a mixture is introduced in a separation tank for oil, water and mud three-phase separating. According to the technology, water content of the oil-containing sludge is decreased from 80-98% to about 50%, most crude oil in the oil-containing sludge can be recovered, and subsequent processing difficulty of sludge can be greatly reduced. The technology has the advantages of wide application scope, and is especially suitable for treatment of oil sludge at bottom of pot, scum and activated sludge, and can be used for treating various kinds of oil-containing sludge generated by petroleum exploitation, storage and transportation enterprises.

The invention relates to a developing polylactic acid micro ball vessel suppository which contains anti-tumor drug, formed by a biological degrade material plant in the vessel, a developing material for baffling the X-ray and the anti-tumor drug, wherein, the biological degrade material coats the developing material and the anti-tumor drug to form particle structure. The invention has the advantages that it can plug the vessel and feed drug targeted; it has better view property under X-ray to watch the plug part; it has biological degradable property to protect the organ; after plugging, the nuclear magnetic resonance (MRI) can be process; the invention can suspend in blood and approach to the end vessel along with blood, to deposit and plug the vessel; the diameter of micro ball can be controlled. The invention has low cost, while it provides a plug material especially the plug material used at terminal vessel.

The invention discloses an oval diversion safe indwelling needle. The indwelling needle comprises a sleeve base with a handle, a puncture steel needle, a sleeve, an extension pipe and a liquid injection connector. The two ends of the extension pipe are connected with the sleeve base and the liquid injection connector respectively. The liquid injection connector comprises a liquid injection connector body, a needle-free connector and a disinfection protective cap, wherein the needle-free connector and the disinfection protective cap are arranged on the liquid injection connector body, and the liquid injection connector body is connected with the extension pipe; the needle-free connector is used for receiving a syringe needle device used for infusion or is connected with a liquid medicine flow-out guiding pipe of an infusion container; the disinfection protective cap is placed on the needle-free connector and is a disinfection protective cap with 2% chlorhexidine; the puncture steel needle and the sleeve are arranged on the sleeve base, and the puncture steel needle is wrapped by the sleeve; a funnel part is arranged on the sleeve base, and the sleeve and the puncture steel needle are arranged on the funnel part of the sleeve base; a blood returning window is arranged on the sleeve base, and the cross section of the puncture steel needle is oval. The oval structure can reduce puncture injuries, occurrence of phlebitis is avoided, and the catheter indwelling success rate of the indwelling needle is increased.

The invention relates to a blowing fan which comprises a shell seat, a stator and an impeller, wherein the shell seat is provided with a containing space, the stator and the impeller are arranged in the containing space, the shell seat is additionally provided with an air inlet and an air outlet which are communicated with the containing space, the impeller is provided with a hub and a plurality of fan blades, the fan blades are connected with the hub, one end of the top edge of each fan blade is an air inlet end which is arranged near the air inlet of the shell seat, an air gap is arranged between the top edge of each fan blade and the top of the shell seat, the air inlet end of the top edge has the shortest distance with the top of the shell seat, and the width of the air gap ranges from 0.3 mm to 2.0 mm, thereby reducing generation of disturbed flows and noise.

The invention relates to the technical field of compound fertilizer production, and in particular to a chemical fertilizer drying device. The chemical fertilizer drying device comprises a rotation shaft, a motor, a bottom seat and a barrel body obliquely connected onto the bottom seat, wherein a high end of the barrel body is provided with a feed port, a low end of the barrel body is provided with a discharge port, the motor is connected with the rotation shaft, a hot water channel is arranged on the inner wall of the barrel body, the high end of the barrel body is provided with a water inlet, the low end of the barrel body is provided with a water outlet, the hot water channel extends into the barrel body, a plurality of heat transmission pipes are arranged in the barrel body in stagger mode, the heat transmission pipes are communicated with the hot water channel, and the heat transmission pipes are in bending shape. The chemical fertilizer drying device uniformly dries chemical fertilizer, and is difficult to damage.

[Problem] To catch excreta whether a person is sitting or supine and essentially independent of movements of the person's body. [Solution] The diaper unit is configured from: an outer diaper wrapper (2), which encloses an artificial gluteal block constructed from an elastic member and which is provided with a cover (20) on which hook and loop fasteners (26aa) are provided at least on the portion that faces a person's gluteal region when worn; and an inner diaper wrapper (3) provided with a main diaper body (30), which has an opening (36) at the section of the diaper for handling feces and which adheres to the outer diaper wrapper (2) by means of the hook and loop fasteners (26aa) of the outer diaper wrapper (2), and a fecal bag (40) the interior of which is water-absorbing and the exterior of which is waterproof, which is bonded to the opening (36) of the main diaper body (30) and is accommodated in a hole in the outer diaper wrapper.

The invention discloses a radio frequency response thermosensitive nano-composite embolization material and preparation and application methods thereof. The radio frequency response thermosensitive nano-composite embolization material is in a core-shell structure composed of a radio frequency response nano material core and thermosensitive nano polymers with the molecular chains modified onto thesurface of the core. The preparation method of the radio frequency response thermosensitive nano-composite embolization material comprises weighing out and mixing thermosensitive nano polymer freeze-dried powder with radio frequency response nano materials for self-assembly reaction, performing ultrafiltration and centrifugation, and then collecting and freeze-drying concentrated solution to obtain the radio frequency response thermosensitive nano-composite embolization material. With the characteristic of radio frequency response, the radio frequency response thermosensitive nano-composite embolization material can improve the thermal deposition efficiency and distribution of abundant blood supply tumor areas, give full play to the multiple chemotherapeutic sensitizing effects of thermaltherapy and achieve the synergistic effects of radio frequency thermal therapy, chemotherapy and vascular embolization; the radio frequency response thermosensitive nano-composite embolization material can serve as an embolization agent for embolotherapy as well as a radio frequency response material, achieve intraoperative X-ray developing and long-term postoperative X-ray re-examination, and accordingly have a broad application prospect in the fields such as nanomedicine, disease diagnosis and tumor treatment.

The invention discloses a combined machine cover for an engineering machine. The combined machine cover comprises an engine compartment cover body and a heat dissipation compartment cover body, and the heat dissipation compartment cover body is provided with an air inlet grid and an air exhaust grid; the heat dissipation compartment cover body is connected to the tail portion of the engine compartment cover body, and the heat dissipation compartment cover body and the engine compartment cover body are isolated through a tail end plate of the engine compartment cover body; the engine compartment cover body comprises an engine compartment inner cover unit and an engine compartment outer cover unit located on the outer side of the engine compartment inner cover unit, the engine compartment inner cover unit is fixedly connected with the engine compartment outer cover unit, and a first closed cavity is formed between the engine compartment inner cover unit and the engine compartment outer cover unit; the heat dissipation compartment cover body comprises a heat dissipation compartment inner cover unit and a heat dissipation compartment outer cover unit located on the outer side of the heat dissipation compartment inner cover unit, the heat dissipation compartment inner cover unit is fixedly connected with the heat dissipation compartment outer cover unit, and a second closed cavity is formed between the heat dissipation compartment inner cover unit and the heat dissipation compartment outer cover unit. The combined machine cover has good sound insulation performance and shock resistance.

The invention discloses a gas turbine component air flow test bench and a test method, and relates to the field of flow test devices. The gas turbine component air flow test bench comprises an air source processing device and a test bench body. The air source processing equipment comprises an air compressor, an air storage tank, a primary filter, a refrigerated dryer, a medium-efficiency filter, an adsorption dryer and a high-efficiency filter; and the test bench body comprises a test air supply pipe, a test air main switch valve, a pneumatic pressure regulating valve, an air distributing bag, a plurality of flow meters, switch valves corresponding to the flow meters, an air collecting bag, a surge tank, a pneumatic pressure regulating valve controller, a test piece pressure measuring sensor, an atmospheric pressure sensor, an atmospheric temperature sensor, an air source pressure sensor, a data acquisition controller, upper computer measurement and control software and a pneumatic control system. The test bench is simple and compact in structure and convenient to move, and the test method is simple to operate and easy to master.

The invention relates to a developing polylactic acid micro ball vessel suppository, formed by a biological degradable material in polylactic acid and a developing material and baffle the X-ray, wherein, the biological degradable material coats the developing material to form particle structure. The invention has adjustable degrade time; it has better view property in X-ray to support watching plug part; and after plugging, the nuclear magnetic resonance (MRI) can be process; and the invention can suspend in blood, to approach the end blood vessel along with blood, to deposit and plug the vessel; and the diameter of micro ball can be controlled. The invention has low cost.

The invention provides a volume-adaptive storage container which can be used for fluid collection and storage. According to the invention, the cavity wall of a containing cavity of the container has the characteristics of a wrinkle structure; an absorber in the containing cavity can expand after absorbing a fluid so as to swell the containing cavity; the saturation volume of the container can be adjusted by changing the component proportion of the absorber; and the container can be repeatedly used after the absorber having absorbed the fluid is replaced, so waste is reduced, and economical performance and environmental protection are achieved. The container can be used for sanitary care of females in a physiological period and body fluid detection sample collection; and compared with existing products of the same kind in the field, the container has a larger volume, smaller boundary dimension and higher compression resistance, leakage prevention and backflow prevention capacity and can realize sanitary care in the whole ovulation period and the whole menstrual period, all-weather long-time use of the container is safer, and the use experience of the container is comfortable and safe.

A thread debris filtering apparatus comprising a thread debris filter. The thread debris filter comprises a filter front cover (100) and a filter rear cover (200) connected thereto. A water filtering part (110) is provided on the filter front cover (100). A water inlet (220) is provided on the filter rear cover (200). A backflow prevention structure (210) is provided on the inner wall of the filter rear cover (200). The backflow prevention structure (210) is provided below the water inlet (220) and in proximity to the water inlet (220). The thread debris filtering apparatus obviates a mesh bag, thus further facilitating operation, while collection performance is not hindered by extended use. At the same time, the backflow prevention structure (210) provided on the filter rear cover (200) is capable of effectively preventing backflow of thread debris, thus providing improved thread debris filtration effect and user experience.

The invention discloses a low-energy-consumption oilless silence air compressor. The low-energy-consumption oilless silence air compressor comprises at least one air cylinder assembly. Each air cylinder assembly comprises a piston and an air cylinder containing the piston, wherein a ceramic film layer is arranged on the inner wall of a cylinder sleeve of the air cylinder, the piston comprises a piston body, a composite material layer arranged on the outer side of the piston body in a sleeving manner, a piston ring embedded in the outer side of the composite material layer, and the piston ring and the composite material layer are made of the same materials and prepared through carbon material containing composite materials. During work, each piston reciprocates in the corresponding cylinder sleeve, each piston ring rubs with the ceramic film layer on the inner wall of the corresponding cylinder sleeve, the composite material layer on the outer side of each piston body plays a guiding role in the corresponding cylinder sleeve, and therefore the friction coefficient between each piston and the corresponding cylinder sleeve is reduced, and efficiency is improved.

A Chinese medicine for treating prostatic disease and its complications is prepared from 5 Chinese-medicinal materials including Chinese angelica root, phellodendron bark, white peony root, liquorice root, etc through modernized technology. Its advantage is high curative effect.

The invention discloses a traction guide type biological oil absorption device for food processing sewage, and belongs to the technical field of sewage treatment. According to the scheme, a pluralityof oil removal floating boxes float on sewage; the oil removal floating boxes are pulled to freely float on the surface of the sewage towards the oil drops under the action of pulling the movable ballto move towards the oil drops; an oil bleaching layer is formed at the periphery of the oil removal floating boxes; the oil stain can be fully absorbed by the oil absorption paper conveniently; the electromagnet is started after the greasy dirt adsorption is finished, magnet balls is enabled to move up, and thus the traction moving ball is pulled to contact with the orifice of the oil flow hole;the roughness of the surface of the whole traction moving ball can be increased by virtue of the tip bulges so that when oil drops contact with the traction moving ball, a layer of oil film can be formed on the surface of the traction moving ball, and the sealing effect on the oil flowing hole can be improved by virtue of the sealing performance of oil, and thus when the oil removal buoyancy tankis taken out of sewage, the possibility that oil stains drop into the sewage again can be reduced, and the absorption efficiency of the oil drops is improved.

The invention discloses a moxa floss protective pad and a special preparation device and a preparation method thereof. The moxa floss protective pad is composed of a surface layer, an absorbing layer and a bottom layer and is characterized in that the surface layer and the bottom layer are composed of breathable non-woven cloth, and the edges of the surface layer and the bottom layer are connected in an adhesive mode; the absorbing layer is located between the surface layer and the bottom layer, the absorbing layer is a thin layer of loose moxa floss covering the inner face of the surface layer, and the shape of the moxa floss layer is consistent with that of the surface layer. The special device and the preparation method can achieve continuous large-scale production, the structure is simple, and the middle moxa floss layer is evenly laid, consistent in thickness, thin, soft and good in absorbing performance and air permeability. The protective pad has good sterilizing, anti-inflammation and dysmenorrheal-relieving effects, and can be used during the menstrual period or the non-menstrual period.

The invention discloses a stepped water sample collection device for water quality environment monitoring. The stepped water sample collection device comprises a water sample collection shell and a sleeve, wherein a carrying handle is fixedly arranged in the middle of the top end of the water sample collection shell; internal thread bushings are fixedly arranged at four corners of the bottom end of the water sample collection shell; the four internal thread bushings are in threaded connection with supporting mechanisms; one side of the water sample collection shell is fixedly connected with one side of the sleeve through two connecting blocks; and the top of one side of the sleeve is fixedly connected with the top of one side of the water sample collection shell through a water inlet pipe.The stepped water sample collection device for water quality environment monitoring disclosed by the invention has the beneficial effects that a first stepped telescopic pipe is connected with the inner wall of the sleeve in a sliding manner, the sleeve can guide the first stepped telescopic pipe, a first insertion ring is clamped with a first limiting ring of the sleeve, and the top end of the first stepped telescopic pipe can be limited, so that the first stepped telescopic pipe can be contracted.

The invention discloses an air filter assembly, which structurally comprises a shell, a blade ring, a filter cartridge and a pull rod, wherein a stop cover is arranged on one end in an axial direction of the shell, a sealing cover is arranged on the other end in the axial direction, the stop cover is provided with an exit pipe coaxial to the shell, and the pull rod is arranged in the exit pipe through a support; the filter cartridge externally sleeved with the blade ring penetrates through the other end in the axial direction of the shell, the penetration end of the pull rod is arranged in the shell, the blade ring is arranged on one side in the axial direction in the shell, the flange of the blade ring is in contact with a retainer ring of the filter cartridge, the pull rod is screwed with a nut of the sealing ring in contact with the filter cartridge, so that the sealing ring of the filter cartridge is in tight contact with the inner wall of the stop cover, and an intake pipe is arranged on a place on one side in the axial direction of the circumferential sidewall of the shell, which corresponds to the blade ring; the sealing cover penetrates through the penetration end of the pull rod, and the pull rod is screwed with a nut in contact with the sealing cover, so that the sealing cover is connected with the other end in the axial direction of the shell, and the sealing cover is provided with a dust removal bag; and the dust removal bag is communicated with a dust collector. The air filter assembly has the advantages of better filtering performance, stronger reliability, and capability of avoiding early abrasion of a locomotive engine to a certain degree.

The invention discloses a puncture outfit for a cardio-thoracic surgical operation. The puncture outfit structurally comprises a puncture needle, an antiskid thread, a gas injection valve, a puncture sleeve, a puncture cone, a sealing cap, a sleeve and a locating device. According to the puncture outfit, during use after improvement, a sealing guard plate is tightly attached to a skin incision of a sufferer, a certain gap possibly generated between the puncture sleeve and the incision is effectively reduced, outside air will be blocked, then, sucking sheets are parallelly attached to the two sides of the incision of the sufferer, a position of the puncture sleeve is effectively located, thus, the puncture sleeve can be free of sloshing after the puncture cone is withdrawn, internal organs of the sufferer are protected effectively, and the puncture effect is improved.

The invention relates to the field of fitness equipment, and especially relates to a damping-variable gas spring. The damping-variable gas spring comprises a cylinder barrel; a piston rod with an upper end stretching out of the upper end of the cylinder barrel; a guide sleeve, an upper sealing ring and a cushion sleeve which are arranged on the upper part of the cylinder barrel and sequentially sleeve the exterior of the piston rod; an upper valve block, a piston, a lower valve block and a lower sealing ring which are sequentially installed on the lower end of the piston rod; the inner side wall of the cylinder barrel is provided with at least one axial flow-passing groove of which the cross section is gradually reduced from top to bottom; the external diameter of the lower sealing ring is matched with the internal diameter of the cylinder barrel; the lower end of the piston is provided with a lower convex ring of which the length is larger than the thickness of the lower sealing ring; the lower sealing ring sleeves the exterior of the lower convex ring, and the internal diameter of the lower sealing ring is larger than the external diameter of the lower convex ring; and the lower valve block is provided with several through grooves opposite to the lower sealing ring. The damping-variable gas spring is good in damping variation effect and convenient to make.