214 results about "Cylinder seal" patented technology

A needle set for a biopsy device is disclosed. The needle set includes an outer member, a cylinder lumen within said outer member, an inner member having a cannula and an inner lumen. The inner member is slidably disposed within the cylinder lumen. The biopsy device also includes a cylinder seal member that is disposed within the cylinder lumen and a cannula seal member attached to the outer surface of the cannula. The cylinder seal member and the cannula seal member define a vacuum chamber therebetween.

A needle set for a biopsy device is disclosed. The needle set includes an outer member, a cylinder lumen within said outer member, an inner member having a cannula and an inner lumen. The inner member is slidably disposed within the cylinder lumen. The biopsy device also includes a cylinder seal member that is disposed within the cylinder lumen and a cannula seal member attached to the outer surface of the cannula. The cylinder seal member and the cannula seal member define a vacuum chamber therebetween.

The invention discloses a coal and rock bore hydraulic fracture experimental apparatus, which comprises a sample device system, a confining pressure system, a fracture system, a sealing system and a monitoring system, wherein the sample device system comprises a sample cylinder, the bottom in the sample cylinder is provided with a screen drum of which the bottom is provided with a water outlet pipe, a sample is accommodated in the sample cylinder above the screen drum, and a simulated bore is formed in the sample; the confining pressure system comprises an air filling subsystem and a water filling subsystem; the fracture system comprises a fracture high-pressure water pump of which a water outlet is communicated with the simulated bore through a fracture pipeline; the sealing system comprises a sample cylinder sealing device and an experimental cylinder sealing device; and the monitoring system comprises an acoustic emission sensor arranged on an external wall of the sample cylinder. By the coal and rock bore hydraulic fracture experimental apparatus, a simulated experiment can be performed in a laboratory to investigate the change rules of crack initiation, expansion and extension in the hydraulic fracture process of a coal mine underground coal seam bore, and know a crack extending direction so as to guide field fracture; therefore, the fracture effect is greatly improved.

A shock absorber includes a body having an outer cylinder which rotates relative to an inner cylinder to provide an adjustable damping force through fluid bypass. A plurality of ports are formed through the inner cylinder to provide the fluid bypass when a passageway within an inner surface of the outer cylinder is aligned therewith. Predetermined patterns of ports selectively adjust the dampening force of the shock absorber. When the passageway is rotated out of alignment with all the ports, no adjustment to the dampening force results as the inner surface of the outer cylinder seals the outer surface of the inner cylinder. When the passageway is rotated to be aligned with a pattern of the ports, the peak damping force is reduced during a longitudinal bypass zone of the stroke as defined by the port pattern. By locating a check valve within the passageway, bypass fluid flow will only occur in one direction.

The invention relates to a sealing core drilling device for underground coal seams and an application method thereof. In the core lifting process of the existing underground coal seam gas content testing and sampling device for coal mines, coal cores are exposed, thereby causing gas loss and influencing the measuring accuracy of the coal seam gas content; and a core drilling device which is used for an oil-gas field needs to be used together with a rope, thereby being not suitable for the underground coal seams. The invention provides the sealing core drilling device and the application method thereof, wherein the device comprises a core drilling bit, an outer cylinder and a drill rod joint which are sequentially connected, an inner cylinder is sleeved in the outer cylinder; the upper end of the inner cylinder is connected with a water distribution joint with a ball seat, and the lower end of the inner cylinder is connected with a reducing sleeve; a hydraulic closing mechanism is arranged between the inner cylinder and the outer cylinder and is connected with the water distribution joint with the ball seat; and an inner cylinder sealing ball valve is arranged at the lower end of the reducing sleeve. In the invention, by using the core drilling device and the matched application method, in the extraction process, the coal cores are fully in a sealing state, thereby reducing the gas loss in samples and fully meeting the underground coal seam gas content testing and sampling requirements for the coal mines.

The invention discloses an oil resistant sealing member rubber material prepared from equal-proportioned and mixed components of an A rubber material and a B rubber material. The A rubber material comprises components of, by weight: 85 to 95 parts of butyronitrile rubber N41, 0.3 to 0.5 parts of sulfur, 4 to 6 parts of zinc oxide, 3 to 4 parts of stearic acid, 1 to 2 parts of an anti-aging agent RD, 1 to 2 parts of an anti-aging agent 4010NA, 3 to 4 parts of micro-crystalline wax, 22 to 25 parts of fast extruding furnace carbon black N660, 62 to 65 parts of high abrasion furnace black N330, 18 to 22 parts of DOP, 25 to 35 parts of calcium sulfate, 3 to 4 parts of a promoter DM, 1 to 2 parts of a promoter TMTD, and 1 to 2 parts of a promoter TETD. The B rubber material comprises components of, by weight: 82 to 87 parts of unitary homo-polymerized chlorohydrin rubber, 12 to 18 parts of copolymerized chlorohydrin rubber, 1 to 2 parts of zinc stearate, 1 to 3 parts of an anti-aging agent RD, 0.4 to 0.6 parts of Gum Easy T-78, 1 to 2 parts of clariant wax, 45 to 55 parts of fast extruding furnace carbon black, 10 to 14 parts of diatomite, 5 to 8 parts of DOP, 4 to 6 parts of dilead tetraoxide 0.4 to 0.6 parts of sulfur, and 1 to 2 parts of a promoter Na-22. Oil resistant sealing members (oil cylinder sealing members) produced from the rubber material provided by the invention has good oil resistance, heat resistance, air-tightness, flame retardance, tearing resistance, and low cost.

The invention relates to a expansion tube device used in oil field well completion, which comprises a expansion tube, a connection screw, a embedded plastic ring, a suspending tube hoop, a suspending tube, a drilling hole, a centralizer, a positioning nut, a vibrating expansion head, a compression sealing plug, a shape memory ring, a cylinder sealing bottom, a auxiliary cylinder, and a fixing anchor. Wherein, the weight proportion of tube material is: C:0.05-0.35, Si:0.5-2.5, Mn:0.8-2.5, Cr:0.05-3.00, Ni:0.00-3.00, Síœ0.03, Píœ0.035, and the others is Fe; the plastic elongation ª€ of expansion tube is 30-35%, the strength ªÊb is 620-650MPa, and the strong plasticity K=18600-22000MPa%. The invention has simple structure, easy connection and high sealing degree, while it can apply the well completion in side drilling and other inland wells with better economic benefits.

A hydraulic pump includes a hydraulic cylinder assembly comprising a cylinder sealed by an upper head and a lower head and carrying a piston which divides the hydraulic cylinder assembly into an upper chamber and a lower chamber. A load is connected to the piston and urges it toward the lower head. A conduit connects a reversible hydraulic pump assembly in fluid flow communication with a pressurized supply of hydraulic fluid and the lower chamber for counterbalancing the load. A control system is operably associated with the reversible hydraulic pump assembly to cause hydraulic fluid to flow back and forth between the lower chamber of the hydraulic cylinder assembly and the pressurized supply of hydraulic fluid. A system is also provided to counteract leakage in the pump by adding hydraulic fluid makeup on an as needed and controlled basis.

The invention relates to a process for brewing wine with animal meat, which uses animal meat, rice and Chinese medicinal materials as raw materials, prepares materials according to the determined weight ratio of raw materials, and processes them by boiling, fermenting and distilling. Put the meat in a casserole and boil it until it is rotten, then put the Chinese herbal medicines that have been removed into the casserole, and continue to boil for 2 hours. , distiller's yeast is 0.65% of the weight of the rice, add water 3 times the weight of the rice, soak and stir the materials in the tank, and stir the materials 3 times a day for the first 3 days in the tank, and seal the tank for saccharification and fermentation for 12 days to 15 days. One day, when the saccharified and fermented rice has no hard core, it will be distilled to produce wine to obtain the finished product. The invention has the advantages of comprehensively absorbing the production methods of fermented wine, distilled wine and mixed wine, and improving it, simplifying the technological process, and the produced wine is clear and transparent, has a good taste and a long aftertaste, and not only maintains the characteristics of ordinary liquor properties, but also has the effect of health care.

The invention relates to a multi-layer multi-group airbag air distributor which comprises air transportation pipelines, airbag fixing device fixing pressing plates, air distributor upper cover retaining screws, a mounting rack fixing iron plate, a signal connecting line, electric detonator mounting racks, electric detonators, a firing pin mounting rack, firing pins, air cylinder sealing pieces, multiple groups of small air cylinders and the like. The multi-layer multi-group airbag air distributor is made of thick iron plates and composed of an upper portion and a lower portion, and the shape of the multi-layer multi-group airbag air distributor is a flat square. Air outlets of the multi-layer multi-group airbag air distributor are connected with automobile safety initiative multi-layer multi-group outer anti-collision airbags through the air transportation pipelines. A rectangular iron plate is installed in the middle of the air distributor to be used as the mounting rack fixing iron plate which is used for fixing the electric detonator mounting racks, the electric detonators, the firing pin mounting rack, the firing pins and locking recoil generated by the electric detonators during explosion. The air cylinder sealing pieces and air cylinder air transportation pipelines are arranged between the firing pins and the small air cylinders. Air inlets of the air distributor are connected with the multiple groups of small air cylinders through the air transportation pipelines, and the air inlets of the air distributor are separated from the small air cylinders through the air cylinder sealing pieces which are used for sealing high-pressure air in the small air cylinders. The air cylinder sealing pieces are installed on the rear wall of the air distributor, and the small air cylinders are also connected to the rear wall of the air distributor through the air transportation pipelines. The multi-layer multi-group airbag air distributor works through the small air cylinders filled with the high-pressure air and installed on the rear wall of the multi-layer multi-group airbag air distributor.

The invention provides a device for a remotely-operated vehicle (ROV) to quickly mount and replace a sensor on a deepwater platform anchor chain underwater and belongs to ocean platform equipment. By adopting the device, unmanned mounting and replacing of the sensor on the deepwater platform anchor chain can be achieved through the ROV. The device comprises an upper frame, a lower frame, a sensor bearing and positioning cylinder and a locking mechanism, wherein the upper frame and the lower frame are fixed to the anchor chain through the locking mechanism; the sensor bearing and positioning cylinder is matched with the upper frame in a clamped mode and fixed to the upper frame; the lower frame is of a hollow structure with a rectangular cross section; the upper frame is of a structure formed by welding a bent steel plate and a cylinder together; the sensor bearing and positioning cylinder is of a cylinder structure provided with a handle matched with an underwater robot arm, and the cylinder seals up the sensor and can resist external pressure. The sensor fixing device is simple in structure and brings convenience to the ROV to quickly mount and replace the self-contained sensor underwater, and the mounting accuracy and reliability are guaranteed.

The invention relates to a washing machine. An inner cylinder is installed inside the washing machine shell and a drain outlet is arranged on the inner cylinder, and a drain valve is installed at thedrain outlet; the washing machine is also provided with a fixed position locking mechanism that rotates the inner cylinder to a fixed drainage position and fixes the inner cylinder, a valve core opening mechanism for opening the drain valve after the inner cylinder is rotated to the fixed drainage position in order to open the drain valve to drain the washing water in the inner cylinder out when the washing machine drains, and the inner cylinder rotates to the fixed drainage position, at least one dewatering outlet is arranged on the inner side wall of the inner cylinder, the dewatering outletis provided with a dewatering valve and the valve core of the dewatering valve is connected with the inner cylinder through a limit spring, and the valve core closes the dewatering outlet under the function of the limit spring; when the inner cylinder is dewatering, the rotating centrifugal force overcomes the spring force of the limit spring to push the valve core to move and open the dewateringvalve to drain. Through the above-mentioned setting, the effects of the inner cylinder seal in the process of inner cylinder rotation and the opening of dewatering valve and / or the draw off valve tonormally drain the containing water in the inner cylinder during dewatering are achieved; at the same time, the outer cylinder is no longer required to be fitted, the volume of the inner cylinder is increased, and the washing capacity of the washing machine is increased.

A R410A refrigerating system self-adaptive control type expanding valve, belongs to the field of the refrigeration technology, wherein a cylinder is arranged on the left of the valve body, and an air inlet pipe fitting is arranged on the right end of the valve body; the cylinder is divided into a left side high pressure chamber and a right side low pressure chamber, wherein the high pressure chamber communicates with an air inlet through the high pressure chamber inlet passage, and the low pressure chamber directly communicates with an air outlet; a high pressure chamber air inlet adjustable bolt is arranged in the high pressure chamber inlet passage; a pretension adjustable bolt is arranged in the cylinder sealing nut; a pretension spring is arranged in the location slot at the lower part of the pretension adjustable bolt. The opening of the expanding valve is controlled by the condensing pressure and the evaporating pressure of the refrigerating system, the manometrical change of the high and low pressure sides make the cylinder piston in the cylinder move left and right with the valve rod and the spherical valve head, thereby adjusting the flow area of the expanding valve throat, and changing the superheat degree of the export of the evaporator through adjusting the flux of the refrigerant.

The invention relates to an energy-saving and compact type guide rail clamping device. The energy-saving and compact type guide rail clamping device is provided with a body structure with symmetrical left and right ends, and each end is provided with a clamping device body, an air cylinder sealing cover, a clamping supporting block, a sealing screw, an air cylinder sealing cover sealing ring, an air cylinder rod fixing nut, a piston sealing ring, a piston, an air cylinder rod sealing ring, a compression spring, an air cylinder rod, a clamping guide column A, a clamping guide column B, a spring washer and a clamping block. The energy-saving and compact type guide rail clamping device is compact in structure, easy to install, wide in application scope and comprehensively suitable for various flat square rails and round guide rails on the market, double-side output pressure braking or simultaneous loosening is achieved, scratching of the guide rails is avoided to a certain degree, the output clamping brake force is large, the brake force as high as 2250 N can be output by a minimum-specification normally-opened type clamping device under the air pressure being 0.4 Mp, energy conservation and environmental protection are achieved, the gas consumption of compression gas is only 0.004 L during braking or loosening motion each time.

The invention discloses a high oil-resistant sealing element rubber material, which is mixed by A and B rubber compounds in equal proportion. The two rubber compounds have the following material components by weight: A rubber compound: 85-95 of nitrile-butadiene rubber, 0.3-0.5 of sulphur, 4-6 of zinc oxide, 3-4 of eleaostearic acid, 1-2 of an anti-oxidant 2, 5-ditert-butylhydroquinone-DTBHQ, 1-2 of an antiager RD, 1-2 of an antiager 4010NA, 3-4 of paraffin, 22-25 of fast extruded carbon black N660, 62-65 of high abrasion carbon black, 18-22 of dioctyl-phthalate, 25-35 of calcium carbonate, 3-4 of an accelerator DM, 1-2 of an accelerator TMTD, 1-2 of an accelerator TETD; B rubber compound: 82-87 of monohomopolymerized epichlorohydrin rubber, 12-18 of copolymerized epichlorohydrin rubber, 1-2 of zinc stearate, 1-3 of an antiager RD, 0.4-0.6 of Gum easy T-78, 1-2 of rhein wax, 45-55 of fast extruded carbon black, 10-14 of diatomite, 5-8 of dioctyl-phthalate, 4-6 of lead tetraoxide, 0.4-0.6 of sulphur, and 1-2 of an accelerator Na-22. The rubber material can be used to produce oil-resistant sealing elements (oil cylinder sealing gaskets) with the advantages of oil resistance, thermoresistance, air impermeability, flame retardation and tear resistance and low cost.

The invention discloses a closed ABS solenoid valve test device which comprises a worktable, a positioning mechanism, a sealing mechanism, a conveying mechanism, a compressing mechanism, an upper framework, a lower framework, and an electric control box. The positioning mechanism comprises two support plates which are arranged on the worktable, a square positioning plate which is installed on the two support plates and is used for placing an ABS solenoid valve, limiting blocks which are arranged on two opposite edges of the square positioning plate and correspond to pump piston holes on the two sides of the ABS valve body, and an energy accumulator baffle which is arranged on a third edge of the square positioning plate, wherein a fourth edge of the positioning plate corresponds to a wheel cylinder surface of the ABS valve body. The worktable is provided with a through hole corresponding to a main cylinder mouth in the lower part of the ABS valve body, and the through hole is disposed between the two support plates. The sealing mechanism comprises a pump hole sealing component at one side of the limiting blocks, a wheel cylinder sealing component at one side of the fourth edge of the positioning plate and a main cylinder sealing component under the worktable. ABS solenoid valve sealing is tested automatically.

A transcritical carbon dioxide vehicle air conditioning system mechanical conditioning type expanding valve, belongs to the refrigeration technical field. In the invention, a cylinder is arranged on the left of the valve body, and an air inlet pipe fitting is arranged on the right end of the valve body; the cylinder is divided into a left side high pressure chamber and a right side low pressure chamber, wherein the high pressure chamber communicates with an air inlet through the high pressure chamber inlet passage, and the low pressure chamber directly communicates with an air outlet; a high pressure chamber air inlet adjustable bolt is arranged in the high pressure chamber inlet passage; a pretension adjustable bolt is arranged in the cylinder sealing nut; an opening valve spring is arranged on the right side of the pretension adjustable bolt; a valve rod is fixed at the center of the right side of the piston; a spherical valve head is fixed on the right end of the valve rod; a piston connecting rod passes through the center of the opening valve spring; a close valve spring is contacted with the right side of the piston. In the application, the manometrical change of the high and low pressure sides make the cylinder piston in the cylinder move left and right with the valve rod and the spherical valve head, thereby adjusting the flow area of the expanding valve throat, and adjusting the pressure at the high pressure side of the system through adjusting the flux of the refrigerant.

The invention discloses a seal device used for a pin hole of a bar grate block. The seal device solves the problem of air leakage of the prior pin hole of the bar grate block, and has the advantages of simple structure, convenient use and effectively solving the problem of air leakage, and the like. The seal device adopts the following structure that: the device comprises a seal bolt in the pin hole of the bar grate block arranged on the side wall of a sintering machine; the seal bolt comprises three cylinders which have different diameters to form a stepped structure, and a top cylinder passes through the pin hole of the bar grate block and is connected with an external magnetic seal axle sleeve; the magnetic seal axle sleeve absorbs iron-containing powder through magnetic force to seal the pin hole of the bar grate block; the diameter of the magnetic seal axle sleeve is greater than that of the pin hole of the bar grate block, and the magnetic seal axle sleeve also plays a role in sealing the pin hole of the bar grate block; a bottom cylinder of the seal bolt is positioned inside the sintering machine; a middle cylinder is arranged between the top cylinder and the bottom cylinder; and a lug boss between the middle cylinder and the bottom cylinder seals the pin hole of the bar grate block.

An improved three-pass cylinder dryer, including a body composed of a bracket, a sealed box and a cylinder, and its driving device, supporting device and controller, wherein the axis of the cylinder of the body is parallel to the horizontal plane, and the cylinder is arranged concentrically. The inner, middle and outer cylinders are misplaced and fitted together, and the volume cavities formed constitute three drying and dewatering units respectively. The adjacent wall panels of the inner, middle and outer cylinders are adjusted by supporting and reinforcing buffer pads. Connection and positioning, the outer circumference of the outer cylinder wall board is provided with a heat insulation cover, and the inner peripheral surface of the inner, middle and outer cylinder wall boards is respectively provided with a spiral propulsion spreader, and the rotation of the helix On the contrary, the ring gear on the outer periphery of the machine body is assembled with the center of gravity of the barrel. It effectively solves the defects of easy deformation and displacement and axial displacement of traditional drum dryers. It has reasonable structural design, stable performance, smooth process flow, large precipitation at one time, high thermal efficiency, energy saving and consumption reduction, and a wide range of applications. .

The invention discloses a double-cylinder magnetorheological vibration reducer adopting coaction of an external coil and a permanent magnet. The double-cylinder magnetorheological vibration reducer comprises a magnetorheological vibration reducer body and a lifting lug; the magnetorheological vibration reducer body comprises a working cylinder, a liquid storage cylinder and a dustproof shell concentrically sleeved; a piston with a piston rod is matched in the working cylinder at intervals, and the working cylinder is fully filled with magnetorheological fluid; the liquid storage cylinder is filled with the magnetorheological fluid and compensation gas, and a liquid storage cylinder sealing mechanism and a base for sealing are fixedly arranged at the upper and lower ends; the top end of thepiston rod penetrates through the guide base and the liquid storage cylinder sealing mechanism in sequence, and extends out of the working cylinder to fixedly connect with the upper end of the dustproof shell; a magnetic exciting device is embedded in the dustproof shell; and an end cover is arranged at the lower end of the dustproof shell. The double-cylinder magnetorheological vibration reducerreduces the machining and assembly difficulty, saves the machining time and cost, prevents pollution of the magnetorheological fluid in the maintenance process, facilitates dissipation of coil heat,and prevents performance reduction caused by overheat of the magnetorheological fluid.

The invention relates to the technical field of chemical industry, and specifically relates to a gumming method of fiber-woven resin reinforced tubes, which is characterized by using a vacuumizing principle to soak a running fiber-woven layer in a sealed resin glue cylinder, and carrying out vacuumizing treatment so that the resin quickly penetrates through the fiber-woven layer to achieve a gumming purpose, wherein a vacuum box (1) is formed by a combination of two semicircular cylinders sealed by a sealing glue cushion (11), the fiber-woven layer (7) is sealed by an annular soft rubber rod (6), the resin enters the vacuum box (1) through a material inlet (3), the fiber-woven layer (7) is soaked in the resin, and the resin enters a groove of a mold (8) through the fiber-woven layer (7) to form a plurality of inner glue rings; and closing the material inlet (3) and starting a vacuum device (5), wherein the air entering along with the fiber-woven layer (7) is quickly raised and broken under the function of negative pressure to fast permeate the resin into the fiber-woven layer (7) to finish the operation of impregnating the fiber quickly. Compared with the prior art, the method provided by the invention has the advantages that the gumming process is finished by vacuum negative pressure, and the product is firm in combination, high in strength and high in surface smoothness.

A novel shake-proof noise-reduction rock drill comprises a shock absorption handle, a cylinder cover, a cylinder block, a movable plug, a drill rod, a cylinder seal cover and a locking ring, wherein the movable plug is connected with a power part of the rock drill, the drill rod is connected with a work part of the drill rod, an oil retainer on the movable plug is provided with a certain number of small holes, a liquid cavity between the cylinder block and the movable plug and a buffering cavity between the movable plug and the drill rod are filled with hydraulic oil, and a spring is arranged between the cylinder seal cover and the locking ring. The novel shake-proof noise-reduction rock drill is simple in structure, firm, durable, small in resistance coefficient, and high in noise reduction quantity, reduces vibration impact and noise interference to an operator during drilling operation, makes the operator fell more comfortable, and prevents the operator from mind and body injury and health hidden danger.

A sealed hydraulic cylinder relates to the technical field of hydraulic cylinders, including a cylinder, a piston, and a piston rod. A seal installation groove is arranged on the outer periphery of the piston, and a combined sealing ring is arranged in the seal installation groove. The combined sealing ring includes a base seal ring, a star-shaped ring and two O-rings, grooves are set radially on the outer periphery of the base sealing ring, the star-shaped ring is set in the groove, and two O-rings are respectively set between the base sealing ring and the piston. When the combined sealing ring is installed in the groove, the two O-rings will apply force to the base sealing ring because they are compressed, so that the base sealing ring and the star ring are close to the inner wall of the cylinder to achieve a sealing effect. When the working pressure of the system increases, the pressure acting on the seal is converted into radial pressure, and there is almost no internal leakage of the system.

An automatic assembling system of a plunger main cylinder sealing leather cup comprises a rack. A plunger pump oil coating mechanism used for coating a cylinder body with oil, a leather cup arrangingmechanism used for pushing the leather cup into the cylinder body and a leather cup flattening mechanism used for flattening edge warp of the leather cup in the main cylinder. A leather cup feeding mechanism is arranged above the leather cup arranging mechanism. The leather cup feeding mechanism is provided with four feeding openings and contain four kinds of leather cups to be assembled. A visualsystem is further installed on the leather cup feeding mechanism. The visual system conducts visual detection when the leather cup feeding mechanism feeds leather cups to the detection position. Qualified leather cups are controlled through the air cylinder to fall onto the leather cup arranging mechanism, and the air cylinder blows air to enable unqualified leather cups to bound into a waste box. A cylinder body servo feeding mechanism is arranged in front of the leather cup arranging mechanism, and the cylinder body servo feeding mechanism fixes the cylinder body and conveys the cylinder body to the installation position.

The invention discloses a transformation method of a regular polygonal thin oil sealed gas cabinet. The transformation method comprises the following steps: a piston oil groove support and a piston oil groove of the regular polygonal thin oil sealed gas cabinet are dismounted; an inner cylinder is mounted; brackets are mounted and connected to a side plate and a stand column of the gas cabinet; the connected brackets are connected with the inner cylinder; a truss of a piston and a piton baseplate are adjusted according to the shape of the inner cylinder, so that the shape of the piston is matched with the shape of the inner cylinder; a piston fence is arranged on the piston to form a one-section rubber film sealed gas cabinet piston; piston sealing profile steel is arranged at the bottom end of the piston fence; inner cylinder sealing profile steel is mounted on the inner cylinder in the peripheral direction; and a rubber film is unfolded, and two ends of the rubber film are respectively connected with the inner cylinder sealing profile steel and the piston sealing profile steel. The transformation method renewedly uses a cabinet body of the wasted polygonal thin oil sealed gas cabinet, and is low in construction investment, short in construction time and higher in economic benefit.

In a high-pressure cylinder with an axial plunger, a seal assembly for scaling the gap between the cylinder wall and the plunger. The assembly is disposed in an annual recess in the wall having an open end and a bottom opposite thereto, and comprises a plunger-sealing ring, a cylinder-sealing ring, a resilient low-pressure ring, and an annual seal holder. The seal holder urges the plunger-sealing ring against the cylinder-sealing ring and the low-pressure ring, and urges the latter two rings against the recess bottom and against each other. The plunger-sealing ring and the cylinder-sealing ring are metallic, their mutual contact surfaces are fitted to each other, and the plunger-sealing ring has sufficient section modulus to ensure that under high pressure the contact and bending deformations at the mutual contact surfaces will be sufficiently small as to keep a tight fit therebetween.