87results about How to "With sealing function" patented technology

The invention discloses a double-cylinder type magneto-rheological damper with inner and outer coils. The double-cylinder type magneto-rheological damper comprises a piston rod, a piston, an inner cylinder barrel, an outer cylinder barrel, an end cover, a dustproof ring, the inner coil, the outer coil, a coil protective layer, a compensation air bag, a bottom locating piece and a nut, wherein the piston rod is tightly connected with the piston; the piston is positioned in the inner cylinder barrel; the inner cylinder barrel is fixed with the bottom locating piece through the end cover; the bottom locating piece is tightly connected with the outer cylinder barrel; a through hole is formed in the middle of the bottom locating piece and used for compensating for an air bag valve port so as to enable the air bag valve port to extend out of the damper; the compensation air bag is mounted at the bottom of the inner cylinder barrel; the end cover is tightly connected with the outer cylinder barrel; the inner coil and the outer coil are wound on the end cover; the dustproof ring is mounted at the top of the inner hole of the end cover; and an end part groove is formed in the part below the end cover. The double-cylinder type magneto-rheological damper with inner and outer coils has the benefits as follows: the structure is simple, the processing and manufacturing are convenient, the cost is low, the damping force of the damper is adjusted, the inner coil has a sealing function, and the sealing performance is good.

The invention discloses antipollution ventilation equipment for isolation of infectious diseases. The ventilation equipment comprises quick-detachable air treatment equipment, an adjustable louver airoutlet component and an adjustable louver air inlet component, wherein the quick-detachable air treatment equipment is arranged outside a negative pressure isolation ward, and the adjustable louver air outlet component and the adjustable louver air inlet component are arranged inside the negative pressure isolation ward; the adjustable louver air outlet component communicates with the quick-detachable air treatment equipment through a fresh air outlet pipeline, and a fresh air outlet fan is arranged on the fresh air outlet pipeline; the adjustable louver air inlet component communicates withthe quick-detachable air treatment equipment through a waste gas recovery pipeline; and a cleaning box is arranged on the top of a heat exchange sealing box. The cleaning box can clean the waste gas recovery pipeline, can avoid bacteria breeding in the pipe and dust accumulation and corrosion in the pipe, and can also be used as a temporary sterilizing box to sterilize waste gas so as to reduce the serious pollution or damage caused by virus leakage when rear-end waste gas treatment equipment fails at the same time.

The invention relates to a labyrinth sealing device and method for a centrifugal machine, and in particular relates to an axial and radial combined sealing device and an assembling method thereof, wherein the device comprises a rotation shaft (8) and a front end cover (4); a plurality of radial fixed seal grooves extend from the front end cover (4) to an axis, and at least one ring fixed sealing fin extends from the front end cover (4) axially; and a plurality of dynamic sealing fins (3) extend radially from the rotation shaft (8) to fix corresponding annular dynamic seal grooves (5). The method is characterized by comprising: prolonging a section of regulating ring from the tail of each dynamic sealing fin; configuring a front end cover of a half structure at the periphery of each dynamic sealing fin, moving towards the dynamic seal grooves until inserting the fixed sealing fins on the front end cover into defined positions in the cavities of the dynamic seal grooves; and pushing and pulling the regulating ring on the dynamic sealing fins to regulate to an accurate position. The sealing device simultaneously has an axial labyrinth structure and a radial labyrinth structure, which is an innovation in the field in domestic and overseas; and the seal effect among the centrifugal machine levels is improved, and the working efficiency of the centrifugal machine is improved.

The invention relates to a cigarette package sealing degree detection device. The device includes a testing mainframe A and a hot sealing machine B. The cigarette package sealing degree detection device is high in sealing degree detection precision, high in detection reproducibility of one pack of cigarettes, short in testing time and capable of visibly determining the cigarette package sealing degree and leakage positions and directly outputting a test report in various formats, online adjustment of a production operation technology of a production enterprise is facilitated during manufacturing, and the package sealing quality of BOPP films of cigarettes is improved.

The invention discloses a sealing structure for a low pressure fuel metal oil pipe of a diesel engine and installation method thereof, the sealing structure comprises a pipe nut, a joint and a sealing rubber sleeve, wherein the pipe nut is installed on the low pressure fuel metal oil pipe of a diesel engine, the joint is arranged at the end part of the metal oil pipe, the pipe nut and the joint form a sealing cavity on the outer wall of the metal oil pipe, the sealing rubber sleeved is arranged in the sealing cavity. A lining is arranged between the outer wall of the metal oil pipe and the inner hole wall of the joint. The sealing structure for the low pressure fuel metal oil pipe of the diesel engine has the characteristics of good manufacturability and good sealing effect, simple assembly, good appearance quality, strong high-low temperature resistance and vibration dumping function and high reliability, is applicable in the diesel engine, especially the diesel engine for vehicles.

The invention relates to an expansion chuck comprising a base (2), a thin-walled expansion sleeve (4) that is disposed in a final axial zone of the base (2) and forms a central seat (5) for a component that is to be clamped, and a clamping ring (6) which surrounds the expansion sleeve (4) so as to form an intermediate annular pressure chamber (7) and is screwed to the base (2). Said pressure chamber (7) is filled with a hydraulic means (11) while the expansion sleeve (4) can be elastically deformed for fixing a component within the seat (5) by axially displacing the clamping ring (6), said clamping ring (6) being twisted in relation to the base (2) such that the volume of the pressure chamber decreases. The inventive expansion chuck is characterized in that the pressure chamber (7) is filled with an elastic solid body (11) as a hydraulic means while a sliding ring element (12) is placed between the elastic solid body (11) and a pressure surface (6a) of the clamping ring (6) in order to transmit an axial compressive force from the clamping ring (6) to the solid body (11).

The invention relates to an auger stem, belongs to the field of mechanical equipment of coal mines and particularly relates to a polygonal pyramid quick-plugging sealed auger stem. The polygonal pyramid quick-plugging sealed auger stem comprises a pin end, a box end, a stem body, a spiral fin and a U-shaped connecting pin, wherein the U-shaped connecting pin adopts the structure that a U-shaped short side is buried into an auger stem joint, so the barrier to the discharge of drilling cuttings is reduced; threads are processed on a long side and are fixed by a lock nut; compared with a single pin body, the U-shaped connecting pin is strong in tension resistance; longer circular beads are arranged at two axial ends of a polygonal pyramid matched surface of the pin end and the box end, so a centralized stress point of the stem is dispersed, and the integral bend resistance of the stem is improved; a sealing groove provided with an O-shaped sealing ring is arranged on the surface of the circular bead at the end part of the pin end, so that the steam has a sealing function. The auger steam can be used for drilling, and the demand of a wet type auger drilling process on the steam is met.

The invention discloses a waterway connector, which consists of a waterway plug and a waterway socket. The waterway plug comprises a plug shell and a tail shell thereof, a stop block and an offsetting spring, wherein a waterway through hole is formed and axially and fixedly connected between the plug shell and the tail shell, the offsetting spring and the stop block are arranged in the waterway through hole, a notch is reserved on the maximum external circle of the stop block, and the notch and a plug shell matched section form a water flow gap. The waterway socket comprises a socket shell and a tail shell thereof, an offsetting spring, a stop block and a central push rod, wherein a waterway through hole is formed and axially and fixedly connected between the socket shell and the tail shell; the stop block, the offsetting spring and the central push rod are arranged in the waterway through hole in turn; the end of the central push rod matched with the tail shell is processed with a through hole; all joints of the plug and the socket are provided with O-shaped sealing rings; and the inside and outside diameters of the socket shell and the plug shell are adapted. The waterway connector has a simple structure and reliable connection; and full-seal function of the waterway connector can be realized in connection and disconnection states.

The invention discloses a combined type buckle arrestor for a fiber-reinforced composite flexible pipe. The combined type buckle arrestor comprises a metal outer lantern ring and a fiber-reinforced inner lantern ring; the metal outer lantern ring comprises a main lantern ring body, a locking lantern ring body and an elastic seal gasket; the fiber-reinforced inner lantern ring comprises a fiber-reinforced layer and a base body protection layer; the fiber-reinforced inner lantern ring is located on the outer side of the composite pipe and bonded with the composite pipe in a hot-melting mode, thus, the pipe is locally thickened so as to achieving promoting of buckling resistant capacity; and the metal outer lantern ring wraps the fiber-reinforced inner lantern ring in an interference fit modeso that the fiber-reinforced inner lantern ring can be assisted in achieving of buckling arresting, and meanwhile, the composite pipe can be prevented from being bent excessively by means of the gooddeformation resistant performance of the metal outer lantern ring, so that stress concentration of the fiber-reinforced inner lantern ring is reduced. The bonding characteristic of materials of the composite pipe is reasonably utilized to achieve machining of the fiber-reinforced inner lantern ring, and the fiber-reinforced inner lantern ring is assisted by the metal outer lantern ring so as to improve the local structural strength; and the combined type buckle arrestor has the advantages of both a steel pipe welding type buckle arrestor and a steel pipe buckling-pressing type buckle arrestorand has wide popularization value and practical value.

The invention discloses a large-aperture static breaking agent oriented rock breakage and spraying hole prevention integrated device and a construction method thereof. The device comprises a sleeve, alower blockage head, an upper blockage head and a water injecting pipe; the lower blockage head is fixedly arranged at the lower part in the sleeve; two oriented breakage gaps are formed in the wallof the sleeve from top to bottom in the axial direction, and are symmetrically arranged about the center line of the sleeve; the upper blockage head is coaxially assembled in an upper port of the sleeve; a static breaking agent filling cavity is formed between the upper blockage head and the lower blockage head in the sleeve; the upper blockage head is provided with a guide hole penetrating up anddown in the center line direction; the water injecting pipe is inserted in the guide hole; and the lower end of the water injecting pipe extends into the static breaking agent filling cavity. The device is simple in structure, convenient to manufacture and install, capable of being recycled and low in construction cost, can achieve such functions as efficient rock breakage by a static breaking agent, oriented rock breakage and spraying hole prevention, and effectively relieves the constraints of the aperture and the construction environment temperature on the rock breaking effect by the static breaking agent.

The invention discloses a treatment agent mixing device for wastewater treatment and a mixing method thereof, and relates to the technical field of wastewater treatment. The device comprises a base, wherein a mixing mechanism is arranged on the base, the left side and the right side of the mixing mechanism are respectively provided with an adjusting mechanism, a collecting mechanism is arranged below the base, and a moving mechanism is arranged on the left side and the right side of the collecting mechanism respectively. The treatment agent mixing device for wastewater treatment and the mixingmethod thereof, have the function of mixing the water and the raw materials through a stirring rod, and meanwhile, a motor drives a scraping plate to rotate, the device has the function of scraping the inner wall of the first groove through the scraping plate, and the situation that the raw materials adhere to the inner wall of the first groove is avoided, the device has the advantage of being convenient to use and has the function of sealing a first groove by a sealing cover, and the situation that the treating agent is splashed out is avoided, the device has the advantages of being convenient to use, has the function of collecting the treating agent, and has the advantage of being convenient for extracting the treating agent.

The invention relates to a device (1) for suctioning off waste products (2) from a production machine (3), in particular from a sheet extruder, comprising a suction chamber (10) on which at least one suction element (20) is arranged, said suction element extending into a suction space (4) located outside the suction chamber (10) in order to convey waste products into the suction chamber (10), and comprising a suction unit (5) to generate a negative pressure in the suction chamber (10). According to the invention, a sealing means (40) that rests against the suction element (20) and seals the suction chamber (10) is designed in such a way that the suction element (20) can move along the sealing means (40), thus enabling the position of the suction element (20) on the suction chamber (10) to be variably adjusted.

The invention discloses an article package box with a sealing function, which comprises a box body and a box cover matched with the box body for use, wherein the box body is cylindrical and is provided with a cylinder bottom and a circumferential wall; a mouth part is arranged at the top end of the circumferential wall; the box cover is made of an elastic piece and comprises an outwards-arched cover body and a plurality of buckling parts uniformly formed on the circumference of the cover body; a clearance is reserved between two adjacent buckling parts; the lower end part of each buckling part is inwards bent to form a clamping part; and an annular groove matched with a plurality of clamping parts to work is arranged on the circumferential wall; and a rubber sealing ring is arranged between the box body and the box cover. Therefore, the article package box disclosed by the invention can achieve the functions of sealing and preventing dampness and dust, not only can be used for accommodating bulk solid articles, but also is especially suitable for accommodating granular articles, powder articles, paste articles, liquid articles and articles requiring dampness resistance and has extremely-wide application range; and meanwhile, the article package box can be also used for preventing mellow and sweet taste of contents in the article package box from diffusing and is beneficial to prolonging the guarantee period of the contents.

The invention provides a refrigerating compartment. The refrigerating compartment comprises an inner container which forms around the refrigerating compartment and a drawer assembly which is accommodated in the refrigerating compartment; the drawer assembly comprises a drawer cover body and a drawer body, wherein the left end and the right end of the drawer cover body are separately equipped with U-shaped guide slots which are adaptive to container ribs, and lower slot walls of the U-shaped guide slots are downwards extended with first flanges; the front end of the drawer cover body is downwards extended with a second flange; the rear end of the drawer cover body is downwards extended with a third flange; the font wall, the rear wall and the upper edges of the side walls of the drawer body co-define an opening; when the drawer assembly is closed, the second flange at the front end of the drawer cover body is mutually matched with the front wall of the drawer body; and the first flange and the third flange of the drawer cover body are separately matched with the edge of the opening of the drawer body to seal the drawer assembly. Compared with the prior art, the refrigerating compartment has the advantages that the drawer body and the drawer cover body are improved in structure, so that the drawer assembly has a sealing function, water in vegetables and fruits placed in the drawer assembly can be locked, and refreshing time of vegetables and fruits is prolonged.

The invention discloses a hydraulic pulse excitation device for experimental investigation on dynamic characteristics of a structure. The hydraulic pulse excitation device comprises a bottom plate, a pulse excitation component and a switch component, wherein the pulse excitation component comprises an impacting shaft, a sleeve, an excitation spring, an excitation hydraulic cylinder and a connector; the switch component comprises a switch hydraulic cylinder, a switch driving lever and a switch resetting mechanism; the excitation spring drives the impacting shaft to generate an impact force, and the switch resetting mechanism is used for locking and releasing the impacting shaft. In the hydraulic pulse excitation device, the hydraulic cylinder is used as an excitation driving mechanism, the hydraulic cylinder has a sealing function, so that the hydraulic pulse excitation device can respectively execute pulse excitation on the structure in air and under water, thereby realizing experiment and measurement of the dynamic characteristics of the structure in air and under water; by regulating the amount of compression of the excitation spring, the hydraulic pulse excitation device can accurately control the size of the excitation force used when pulse excitation is applied to the structure, and excellent repeatable accuracy is obtained in aspects of the origin of force of excitation and the excitation force direction.

The invention relates to a high-pressure fuel pump of an internal combustion engine, comprising a pump housing, in which a drive shaft (2) having a cam or eccentric drive (3) is received and rotatably mounted about a longitudinal drive shaft axis (4) for actuating at least one pump element arranged in the pump housing (1). The pump housing (1) comprises a housing part (5) that has a bearing bore (6) and is connected to the pump housing (1) for receiving and rotatably mounting the drive shaft (2). According to the invention, the housing part (5) is connected to the pump housing (1) by way of a frictional press connection (7), wherein the frictional press connection (7) is formed by the housing part (5) comprising at least one section (a, b) that is radially larger in relation to a recess (8) of the pump housing (1) into which the housing part (5) is inserted.

The invention relates to a model box rotary joint device used for tunnel structure multi-point vibration table test. The joint device is connected with two model boxes; the joint device comprises a rotating shaft toggling bolt, a toggling slot, springs, end portion U-steel, cover plates and an impermeable material; the rotating shaft toggling bolt is arranged at an edge of the bottom of one of the two model boxes; the toggling slot is arranged at an edge of the bottom of the other model box; edges of adjacent bottoms of the model boxes are respectively provided with end portion U-steel; the end portion U-steel is provided with the cover plates; the rotating shaft toggling bolt is inserted into the toggling slot, such that a connecting component can be formed; two sides of the connecting component are symmetrically provided with springs for connecting the two model boxes; the impermeable material is arranged between the two model boxes and is used for preventing model soil arranged inside the two model boxes from being exposed. Compared with the prior art, the model box rotary joint device of the invention has the advantages of sufficient strength, elastic rotation capacity, high axial stiffness, high shear stiffness, sealing function and the like.

The invention discloses a production process for preparing miners lamp with protection level, and relates to the lamp illumination technology field and the miner safety production technology field. An edge extending out is arranged on the side of an elastic switch press key, the inlaid ring of the switch press key is made of engineering plastics which is homogeneous with the casing body of the switch, when the casing body and the inlaid ring of the switch press key are integrated through hot melting by adopting the ultrasonic wave hot melting process, the switch press key is inlaid on the casing body, the edge extending out on the side of an elastic switch press key is pressed in a groove shaped space between the inlaid ring of the switch press key and the casing body, a lamp cover and a lamp surface glass which are made of compatible engineering plastics are integrated through hot melting by adopting the ultrasonic wave hot melting process, and thereby the entire casing is in the fully sealed structural form. The process of the invention enables the complete lamp to achieve the fully sealed waterproofing structure in the true sense, and enables the protection level of the miners lamp become diving type from waterproofing type. The promotion and the application of the production process can enable the protection level of the miners lamp to be upgraded to be intrinsic safety type from coal mine safety authorization type.

The invention provides a housing base body for a radiation-emitting and / or receiving semiconductor component having at least one radiation-emitting and / or receiving semiconductor chip. The housing base body has a recess for the semiconductor chip, in which recess the semiconductor chip can be encapsulated by an encapsulation compound. Wherein, the groove has a chip groove, in which the semiconductor chip is fixed. The recess also has a groove which at least partially surrounds the chip groove within the groove, so that the housing base body has a wall between the chip groove and the groove. Seen from the underside of the chip well, the top of the wall is below the level of the front side of the housing base body from which the recess enters into the housing base body.

The invention relates to a back projection TV, which comprises a screen, a protective glass, and a front frame, while the screen is cling to the protective glass and fixed at one side of front frame. The invention also provides a relative mounting method, which comprises: mounting the protective glass into front frame; horizontally arranging the screen on the protective glass; arranging screen compress bars on the four edges of screen; fixing the screen compress bars, screen and protective glass on the front frame, to avoid hurting screen; the protective glass and screen are at the same side of front frame, to be cling, to avoid dust entering to the interlayer between them; the sponge bar adhered on the screen compress bar has flexibility, with adjustable mounting error, to reduce the breakage caused by over compressing the protective glass and screen, with sealing function.

The invention discloses a special fresh air handling unit for a negative-pressure isolation ward. The special fresh air handling unit is applied to the negative-pressure isolation ward, the negative-pressure isolation ward comprises an isolation room, a ward body and a toilet which are in communication with one another, and the special fresh air handling unit is characterized in that the fresh airhandling unit comprises quick-release air handling equipment, an adjustable louver air outlet assembly and an adjustable louver air inlet assembly; the quick-release air handling equipment is arranged outside the negative-pressure isolation ward, the adjustable louver air outlet assembly and the adjustable louver air inlet assembly are arranged inside the negative-pressure isolation ward; the adjustable louver air outlet assembly is in communication with the quick-release air handling equipment through fresh air outlet pipelines, a fresh air outlet fan is arranged on the fresh air outlet pipelines, and the adjustable louver air inlet assembly is in communication with the quick-release air handling equipment through waste gas recovery pipelines. According to the special fresh air handlingunit for the negative-pressure isolation ward, pipeline layout is carried out in a mode that part of waste gas recovery pipelines and fresh air pipelines ( fresh air inlet pipelines and fresh air outlet pipelines) share same pipeline, the quick-release air handling equipment is designed, so that the overall pipeline system of the unit is reasonable and simple in layout and very convenient to assemble, disassemble and maintain.

The invention relates to detection equipment with a protection function. The detection equipment comprises a main body, a display screen, a detection needle and a detection assembly; the display screen is arranged on the main body; the detection needle is vertically arranged; the top end of the main body is arranged on the detection needle in a sleeving mode; the detection assembly is arranged atthe bottom end of the detection needle; the detection assembly is arranged in the main body; a protection mechanism is arranged in the main body; a cleaning mechanism is arranged at the top end of themain body; the protection mechanism comprises a lifting plate, a driving motor, a driving gear and two protection assemblies; the cleaning mechanism comprises a cleaning assembly and at least two power assemblies; and the cleaning assembly comprises a cleaning ring, a connecting gear, a transmission gear, a transmission motor and a connecting plate. The detection equipment with the protection function achieves the protection function through the protection mechanism, so that the service life is prolonged; and moreover, the function of cleaning a detected part is realized through the cleaningmechanism, so that the detection precision is improved.

A double-sided single-side-sealing gasket comprises a gasket body and a central hole, wherein a concave table is arranged around the central hole, the external portion of the other side of the gasket body corresponding to the concave table is further provided with a groove, rubber rings are arranged in the concave table and the groove, and a sealing role can be played through the rubber rings in the concave table and the groove.

The invention relates to a mechanical-electrical integration separate production packer. An upper connector is in threaded connection with one end of a central pipe, and a setting assembly is arrangedon the outer circumference of the central pipe; the other end of the central pipe is in threaded connection with a transfer connector, a through hole is formed in the transfer connector, the inner circumference of the transfer connector is connected with an outer steel sleeve, the inner circumference of the outer steel sleeve is connected with a motor system through an outer component, the frontend of the motor system is connected with a pump valve system at the front end through a transmission lead screw, and different pipelines in the pump valve system are communicated with the through hole to achieve the setting and deblocking functions; a circuit system is arranged at the rear end of the motor system and connected with the motor system through a control cable; the tail end of the outer steel sleeve is in threaded connection with a lower connector. According to the separate production packer, the oil well completion technology is organically combined in a mechanical-electrical integration mode, the information processing and control functions of electronic devices are added or fused in a mechanical device of the packer, and a key technology is provided for a digital oil fieldproduction management decision platform.

The invention relates to an engine packaging box with a sealing function, which comprises a box body (1), a fixed bracket (2) and a damping device (3), wherein the box body (1) comprises a box bottom (9) and a box cover (8) which are connected by a hasp; the fixed bracket (2) is arranged in the box body (1); the damping device (3) is arranged between the fixed bracket (2) and the box body (1); the box body (1) comprises a metal frame (4), a glass reinforced plastic inner layer (5), a glass reinforced plastic outer layer (6) and a thermal insulating layer (7); the glass reinforced plastic inner layer (5) is arranged inside the metal frame (4); and the thermal insulating layer (7) and the glass reinforced plastic outer layer (6) are arranged on the outer layer of the metal frame (4) from near position to far position. The engine packaging box with the sealing function, which is specially provided by the invention, has a humanized structural design; the protection level can be improved, so that the packaging box can be used for storing and transporting aircraft engines in various harsh environments (such as high temperature, high humidity and high salt mist) without being limited by the environmental conditions.

The invention discloses an automatic garbage classified collection vehicle which comprises a vehicle body and bolts, a box body is installed above the vehicle body, a first movable shaft is connectedto one side of the bottom of the box body, the box body is connected with a first sealing door through the first movable shaft, and a locker is connected to one side of the top of the first sealing door. A connecting groove is formed in the side, close to the first sealing door, of the box body, a sealing gasket is fixed to the side, close to the connecting groove, of the first sealing door, and afiltrate hole is formed in the surface of the bottom of the box body. According to the automatic garbage classified collection vehicle, sewage in garbage is filtered into a sewage collection box through the filtrate hole in the bottom of the box body, the bottom of a guide groove in the sewage collection box is in a slope shape, so that the sewage is collected to a water outlet pipe at the bottomend of the guide groove, and when the sewage is fully collected, a sealing cover is unscrewed, and the sewage is discharged through a water outlet pipe, and after the sewage is discharged, the sealing cover is screwed again, so that the sewage is conveniently filtered and collected.

The invention discloses a reusable self-sealing box and bag. The reusable self-sealing box comprises a box body, first sealing assemblies, a second sealing assembly, two first shaking covers and two second shaking covers, the box body is made of plastic hollow plates, and the upper side and the lower side of the box body are open surfaces; the two first shaking covers and the two second shaking covers are included, and the two second shaking covers are rotatably connected to the other set of two symmetrical side edges of the open surfaces of the box body; the first sealing assemblies are arranged on the top surfaces of the first shaking covers and the bottom surfaces of the second shaking covers, and after the first shaking covers are sealed from one set of two symmetrical side edges of the open surface of the box body, the second shaking covers are closed and connected with the first shaking covers through the first sealing assemblies; and the second sealing assembly is arranged at the attached side edges of the two second shaking covers, the two second shaking covers cover the first shaking covers from the other set of two symmetrical sides of the open surface of the box body, and the second sealing assembly connects the two second shaking covers in a sealing mode. The reusable self-sealing box and bag are rapidly sealed, disassembled and assembled, and turned over to be usedfor multiple times, is high in bearing strength, not prone to being damaged and good in sealing effect, and has sealing and confidentiality functions.

The invention provides a power capacitor with an improved internal fuse structure. The power capacitor comprises a core arranged in a capacitor housing, wherein the core comprises a plurality of mutually stacked welding components; each welding component comprises a plurality of capacitive element assemblies; each capacitive element assembly comprises a capacitive element, an element inside liner, an element outside liner, a fuse and an adhesive tape; and each fuse comprises a fusant part and terminals arranged at the two ends of the fusant part. The power capacitor is characterized in that the fusant parts of the fuses are fixed on non-stacking sides of the element inside liners by the adhesive tapes, and located between the element inside liners and the element outside liners; one terminal of each fuse is electrically connected with an electrode of each capacitive element; and the other terminal of each fuse extends out of a hole of each element outside liner. The power capacitor does not influence a compaction factor of an element, and an influence on the electric performance of the capacitor can be further avoided.