46results about How to "Reach the seal" patented technology

The invention discloses a cement concrete pavement curing agent and a preparation method thereof and belongs to the related field of asphalt road maintenance and repairing. The curing agent comprises the following components in percentage by weight: 15 to 40 of refined asphalt, 10 to 30 percent of coal asphalt, 10 to 20 of epoxy resin, 20 to 40 percent of modifier, 3 to 15 percent of diluent, 0.5 to 3 percent of aids, 3 to 10 percent of curing agent, and 10 to 30 percent of aggregate. The preparation method comprises the following steps of: shearing the refined asphalt, the coal asphalt, the epoxy resin, the modifier, the diluent, and the aids at the high speed at the temperature of between 100 and 120 DEG C for 60 to 90 minutes to form base stock A; and adding a curing agent (B) and aggregate (C) into the stock A, and uniformly stirring at normal temperature to obtain the curing agent. The curing agent has a simple preparation process, low equipment requirements, low using cost, and strong cement concrete seepage force, can be integrated with a pavement, and has the advantages of improving road appearance, sealing a road surface, prolonging the service life of a road and the like.

The invention relates to the field of sealing, in particular to a rubber sleeve with a lower end seal ring covered with an opened copper sheet, a packer and a bridge plug, wherein the rubber sleeve is used in the oil exploitation industry and can bearing high temperature and high pressure. The lower end seal ring of the rubber sleeve is covered with the first copper sheet, the first copper sheet covers the upper surface, the lower surface, the inner side face and the outer side face of the lower end seal ring, and the thickness of the first copper sheet is set in the mode that when the upper end bears first axial pressure, the lower end seal ring deforms in the radial direction so that the part, distributed on the inner surface of the lower end seal ring, of the first copper sheet can butt against a center tube and the part, distributed on the outer surface of the lower end seal ring, of the first copper sheet can butt against the sleeve; an annular opening is formed in the edge, located on the upper surface of the lower end seal ring, of the first copper sheet. The lower end seal ring is covered with the first copper sheet, the degradation function on the rubber sleeve by high-temperature and high-pressure steam micromolecules is reduced or prevented, and the sealing long-term effect of the rubber sleeve is improved.

A precise seeding mechanism of a rice seeding machine is characterized by comprising a machine frame, wherein a seeding conveying belt is arranged in the machine frame, a seeding support and an inclined support are arranged on the machine frame, a storage hopper and an air blowing device are arranged on the seeding support, and an automatic feeding control device is arranged on the outer wall of the storage hopper; the automatic feeding control device comprises a material falling port at the bottom of the storage hopper, a material blocking air cylinder and a material blocking plate, wherein the material blocking air cylinder and the material blocking plate are arranged on the front side of the storage hopper, a piston rod of the material blocking air cylinder is connected with the material blocking plate, and the material blocking plate is in contact with the material falling port; the air blowing device comprises an air blowing support which is fixed to the seeding support, air blowing pipes are arranged on the air blowing support, one end of each air blowing pipe is connected with an air pump, and air blowing nozzles are arranged on each air blowing pipe; and the inclined support is provided with a seeding roller, a feeding hopper, a receiving hopper and a vibrating device, seed suction holes are formed in the seeding roller, and each two seed suction holes form a group, seeding rotating shafts are arranged at the two ends of the seeding roller, the vibrating device comprises a vibrating bracket which is fixedly connected with the inclined support, and a vibration machine is arranged in a vibration outer cover which is arranged on the vibrating bracket, and a connecting plate is arranged on the outer wall of the rear side of the feeding hopper and is connected with the vibrating outer cover.

The invention relates to the field of sealing, in particular to a packer element with a lower end sealing ring wrapped by two copper sheets, a packer and a bridge plug which are used in the oil production industry and can bearing high temperature and high pressure. The packer element adopts the structure that a first copper sheet wraps the upper surface, the lower surface, the inner side surface and the outer side surface of the lower end sealing ring, and consists of an inner copper sheet and an outer copper sheet; the inner copper sheet wraps the upper surface, the lower surface and the inner side surface of the lower end sealing ring; the outer copper sheet wraps the upper surface, the lower surface and the outer side surface of the lower end sealing ring; the inner copper sheet and the outer copper sheet overlap on the upper surface and the lower surface of the lower end sealing ring. As the lower end sealing ring is wrapped by the first copper sheets, the degradation effect of micromolecules in high-temperature high-pressure steam on the packer element can be reduced or avoided, and the long-acting sealing effect of the packer element is improved.

The invention relates to the field of sealing and particularly relates to a rubber barrel with relatively hard upper and lower end parts, which is used in an oil exploitation process and can bear high temperature and high pressure, a packer and a bridge plug. According to one aspect of the invention, the rubber barrel is provided; and the hardness of the upper end part of the rubber barrel is greater than that of the middle part of the rubber barrel, so that the deformation of the middle part in the radial direction is greater than that of the upper end part in the radial direction when the upper end part bears first axial pressure. The hardness of the upper end part of the rubber barrel is greater than that of the middle part of the rubber barrel, so that the upper end part is almost used for transmitting the first axial pressure to the middle part and the lower end part, but not utilizes the first axial pressure to self radial deformation when the upper end part bears the first axial pressure. Therefore, the middle part and the lower end part have the radial deformation when the relatively small first axial pressure is used, and the sealing of the whole rubber barrel is realized.

The invention belongs to the technical field of urban flood control and waterlogging prevention, and relates to a full-automatic aluminum alloy flood control wall body. An upper panel of a wall body panel comprises spliced panel profiles, connecting profiles for connecting the adjacent panel profiles, and a bottom profile; a lower panel comprises a plurality of hollow floating body profiles weldedto the lower surfaces of the panel profiles, plugs blocking the two ends of the floating body profiles, and blocking profiles welded to the ends of the panel profiles; the n-shaped connecting profiles are inserted and connected into first insertion grooves and second insertion grooves in the two sides of the upper end of the adjacent panel profiles; a first L-shaped connecting plate is arranged on one side of the lower end of each panel profile, and a second U-shaped connecting plate cooperatively mounted with the first connecting plate is arranged on the other side of the lower end of each panel profile; and the first connecting plates and the second connecting plates of the adjacent panel profiles are fixed through welding bolts. The full-automatic aluminum alloy flood control wall bodyhas high specific strength, is integrally extruded and molded, and is convenient and reliable to connect, good in sealing performance, easy to maintain and environmentally friendly, and the purposesof improving the product performance and prolonging the service life are achieved.

The invention relates to the technical field of brewing machinery and equipment, in particular to a sorghum liquor storage device. The sorghum liquor storage device comprises a liquor storage tank, inside which a liquor storage box is arranged. The size of the liquor storage box is smaller than the size of the liquor storage tank. The upper side of the liquor storage box is provided with a feed pipe, which passes through the liquor storage tank to be arranged outside the liquor storage tank. A cork and an elastic airbag are arranged from top to bottom inside the feed pipe. The upper end of thefeed pipe is provided with a stop block. The width of the elastic airbag is larger than the width of the feed pipe. The feed pipe is provided with an exhaust vent, on which a one-way gas outlet valveis arranged. A fixed bracket is arranged on the upper side of the cork. A push plate is arranged above the fixed bracket. A cooling box is arranged above the push plate. A fixed plate is arranged onthe fixed bracket. A through hole is formed in the fixed plate and the push plate. A two-way screw is arranged inside the fixed bracket. The other end of the two-way screw passes through the push plate to be disposed in the cooling box. One end of the two-way screw in the cooling box is coaxially connected with an impeller. The scheme is used for sorghum liquor storage and can achieve the effect of small change of temperature difference.

The present invention relates to one spinning machine possessing many adjacent arranged spinning spindle sites. Each of the spinning spindle sites has one drafting device, one pair of front rollers to form the front nipper bite, and one collecting area below the drafting device to collect drafted fiber sliver. Each of the collecting areas contains one fiber sliver conveying air permeating conveying belt guided with one sliding plane possessing sucking slot. The sliding plane possessing sucking slot has separated cover set on the sucking pipe extending to many spindle sites. The sucking pipe is set in the place separated from the front roller pair by certain distance formed with the overlapped sliding planes of the covers.

The application relates to the field of sealing, in particular to a rubber barrel with inner side of a lower seal ring not coated with copper sheet, a packer and a bridge plug, with the rubber barrel capable of bearing high temperature and high pressure in the oil production industry. The outside of the lower seal ring of the rubber barrel is covered with first copper sheet, and the first copper sheet covers the upper surface, lower surface and outer side of the lower seal ring instead of the inner side of the lower seal ring; the thickness of the first copper sheet is configured such that when an upper portion bears first axial pressure, the lower seal ring deforms radially to enable the first copper sheet distributed on the inner side of the lower seal ring to contact a center tube, and the first copper sheet distributed on the outer surface of the lower seal ring to contact a sleeve. The lower seal ring of the application is covered with the first copper sheet, the degrading effect of high-temperature high-pressure steam small molecules on the rubber barrel is decreased or avoided, and long-term sealing effectiveness of the rubber barrel is improved.

The invention relates to the field of sealing, in particularly to a rubber sleeve which can bear high temperature and high pressure and comprises a metal wire sealing ring, a packer and a bridge plug used in the oil exploitation industry. The rubber sleeve comprises the metal wire sealing ring and a fiber wire sealing ring, wherein the metal wire sealing ring and the fiber wire sealing ring abut against each other and are arranged on the lower portion. The metal wire sealing ring comprises a plurality of mutually intersecting metal wires and glue bonding the metal wires together. The fiber wire sealing ring comprises a plurality of fiber wires which mutually intersect and resist high temperature and high pressure and glue bonding the fiber wires together. When the metal wire sealing ring is arranged below the fiber wire sealing ring, axial pressure transmitted to the fiber wire sealing ring can be reduced due to the friction between the metal wire sealing ring and a central pipe and / or a sleeve pipe, and at the time axial pressure on the fiber wire sealing ring can be effectively reduced. The reason for generation of shoulder protrusion is too large axial pressure, so that generation of shoulder protrusion can be reduced or prevented through the design.

The invention discloses a battery case. The battery case comprises a case body, a lower shell arranged on the bottom of the case body, a bottom cover arranged on the lower shell, an upper cover arranged on the top of the battery case, and a top cover arranged on the upper cover; the case body is an integrated annular cylinder; a plurality of supporting protruded strips are arranged between the upper end surface and the lower end surface of the internal wall of the case body, separation grooves are formed between the support protruded strips; a plurality of embossments A stretch upwards from the joint surface between the lower shell and the case body, a ring of annular groove is arranged on the joint surface along the outer edges of the embossments A, the embossments A are matched with the separation grooves; a plurality of embossments B stretch downwards from the joint surface between the upper cover and the case body, a ring of annular groove is arranged on the joint surface along the outer edges of the embossments B, and the embossments B are matched with the separation grooves. The battery case can well protect the battery in the case from water, and the battery can be conveniently stored in the case and taken out from the case. The invention also discloses an assembly method of the battery case.

The invention relates to a static seal structure of a dish-shaped ring. The static seal structure of the dish-shaped ring comprises a first metal part, a second metal part, a dish-shaped ring body and a fastening piece; an inner step, a convex seal step and a convex limit step are mounted on the first metal part in sequence from the center to the periphery; an outer step, a concave seal step and a concave limit step are mounted on the second metal part in sequence from the center to the periphery; the inner step is matched with the outer step; the seal surface of the convex seal step is matched with the seal surface of the concave seal step; the convex limit step is matched with the concave limit step; the dish-shaped ring body is located between the seal surface of the convex seal step and the seal surface of the concave seal step; the fastening piece applies axial force through the convex limit step and the concave limit step. The static seal structure of dish-shaped ring solves the technical problems that the existing static seal realized through welding under ultimate temperature is high in cost and is bad in operability; the static seal structure of dish-shaped ring provides the static seal proposal under ultimate temperature, the structure is simple, the cost is low, and the operation is finished conveniently.

The invention relates to the field of sealing, in particular to a rubber cylinder coated with upper and lower copper skins on a lower end sealing ring as well as a packer and a bridge plug, which are used in the petroleum production industry. A first copper skin coats the lower end sealing ring of the rubber cylinder; the first copper skin comprises an upper side copper skin and a lower side copper skin; the upper side copper skin coats the upper surface, the external side surface and the internal side surface of the lower end sealing ring; the lower side copper skin coats the lower surface, the internal side surface and the external side surface of the lower end sealing ring; and the upper side copper skin and the lower side copper skin are overlapped on the internal side surface and the external side surface of the lower end sealing ring. According to the invention, as the first copper skin coats the lower end sealing ring, a degradation effect, on the rubber cylinder, of small molecules of high temperature high pressure vapor is lightened or prevented and the long-term effect of the sealing of the rubber cylinder is enhanced.

The invention relates to the field of sealing, and particularly relates to a rubber barrel with harder upper end part which is used in an oil exploitation industry and can bear a high temperature and a high pressure a packer and a bridge plug. According to one aspect of the invention, the rubber barrel is provided, wherein the hardness of the upper end part of the rubber barrel is more than the hardness of the middle part of the rubber barrel, so that the shape change of the middle part in the radial direction is more than the shape change of the upper end part in the radial direction when the upper end part bears first axial pressure. The hardness of the upper end part is more than the hardness of the middle part, in this way, when the upper end part bears the first axial pressure, the upper end part tends to transfer the first axial pressure to the middle part and a lower end part rather than uses the first axial pressure for self radial deformation. Thus, the middle part and the lower end part can be enabled to generate radial deformation when a smaller first axial pressure is used, so as to achieve the integral sealing of the rubber barrel.

The invention discloses a waterproof socket and plug capable of being operated underwater. The waterproof socket comprises a plug, a row type socket matching the plug, and a wall socket matching the plug. The plug comprises a taper hole sealing nut, a silica gel taper plug, a junction box cover, a sealing silica gel ring, a junction box insertion fixing seat, a metal ground wire buckle, a conductive contact and a ground wire connecting insert. The silica gel conical plug is clamped in a conical hole sealing cap; the taper hole sealing cap is in threaded connection with one side of the junctionbox cover, the other side of the junction box cover is connected with the junction box insert fixing seat in a clamped mode, a sealing silica gel ring is arranged at the contact position of the junction box cover and the junction box insert fixing seat, and two conductive contacts are in threaded connection with the side, away from the junction box cover, of the junction box insert fixing seat. The waterproof socket and plug capable of being operated underwater have the advantages of being operated underwater, preventing misplug by children, being not easy to loosen when the wire socket and plug are pulled, preventing electric arcs from being generated and the like.

The invention discloses pressing type writing stationery which comprises a pen holder, a holder body, a pen point and a pen cap. The refill is provided with a pen point; the covering assembly comprises a connecting piece and a covering piece, the connecting piece is connected with the covering piece, and a covering part used for covering the pen point is arranged on the covering piece; the spring is used for driving the pressing part or the connecting piece to reset; wherein the refill is arranged in the pen holder, the pen point extends out of the pen holder, the connecting piece is connected with the pressing part, and the covering piece is arranged on the mounting part and can slide and rotate relative to the mounting part; the pressing part is used for driving the covering piece to move close to and cover the pen point through the connecting piece or driving the covering piece to rotate away from and open the pen point. The antifouling capability of the pressing type writing stationery is improved, and the user experience is improved.

The invention discloses an aluminum alloy casting die with ridge surfaces. The aluminum alloy casting die with the ridge surfaces comprises a male die and a female die, wherein a male ridge surface isformed on the upper end surface of the male die, a ridge table is arranged on the upper end surface of the male ridge surface, a male die forming cavity is formed in the center of the upper end surface of the ridge table, a female ridge surface is formed on the upper end surface of the female die, a ridge groove is formed in the upper end surface of the female ridge surface, a female forming cavity is formed in the upper end surface of the ridge groove, and fixed positioning through holes are formed in four corners of the male die and the female die. A layer of ridge surface is formed on theperiphery of a die core, so that the male die and the female die can be matched better, sealing between the male die and the female die can be realized better, casting raw materials are saved, and theeffect of cost reduction is achieved.

The invention relates to a cable connector manufacturing method for a blasting operation. The method comprises the following steps: (1) carrying out performance checking on cables, (2) sequentially carrying out slackening, splitting detaching and positive winding separating on the outer layer armors of the cables, separating the outer layer armors from the inner layer armors, (3) winding the separated outer layer armors into a circle on root portions of the outer layer armors to form load-bearing rings, using residual outer layer armors to carry out negative winding and return to the cables, (4) carrying out joint winding by using thin iron wires and black tape in sequence after winding is finished, (5) carrying out slackening, splitting detaching and positive winding separating on the inner layer armors of the cables, separating the inner layer armors from the cables, (6) using the separated inner layer armors to wind the load-bearing rings, using the residual inner layer armors to carry out negative winding and return to the cables, (7) carrying out joint winding by using thin iron wires and black tape in sequence after winding is finished, then carrying out reshaping on the load-bearing rings, and (8) carrying out the process of performance checking on cable cores to confirm whether the cable cores meet industrial requirements. The cable connector manufacturing method for the blasting operation achieves the purposes of connection of the cables and an ignition device, load bearing and cable core sealing.

The invention discloses a resistor with a moisture-proof structure, which comprises an outer casing, the outer casing is a hollow rectangular box structure, the bottom of the outer casing is provided with a bottom opening, and the opposite position of the left side of the outer casing is provided with a left Aviation plug, the right side of the outer casing is opposite to the right side of the aviation plug, the left side of the aviation plug runs through the left side of the outer casing, the right side of the aviation plug runs through the right side of the outer casing, and the left side of the outer casing is opposite The position is equipped with a left circular guide rail, and the right side of the outer casing is provided with a right circular guide rail. The left circular guide rail is provided with a left upper guide rail slider and a left lower guide rail slider. The right circular guide rail is provided with a right upper guide rail slider and a right lower guide rail slider, and a column resistor is provided between the left aviation plug and the right aviation plug, and the column resistor has a cylindrical structure. The beneficial effect of the present invention is that the waterproof effect is better, and the desiccant can be replaced under the condition of uninterrupted power supply.

The invention relates to the field of sealing, in particular to a rubber sleeve which is used in the oil exploitation industry, can bear high temperature and high pressure and does not coat the inner side face of a sealing ring at the lower end with a copper sheet, a packer and a bridge plug. The outside of the sealing ring at the lower end of the rubber sleeve is coated with a first copper sheet; the upper surface, the lower surface and the outer side face of the sealing ring at the lower end are coated with the first copper sheets but the inner side face of the sealing ring at the lower end is not coated with the first copper sheet; the thicknesses of the first copper sheets are set as follows: when an upper end part bears a first axial pressure, the sealing ring at the lower end deforms in the radial direction, further the first copper sheet distributed on the inner side face of the sealing ring at the lower end is enabled to prop against a central pipe, and the first copper sheet distributed on the outer surface of the sealing ring at the lower end is enabled to prop against a casing pipe. The sealing ring at the lower end, disclosed by the invention, is coated with the first copper sheets, so that a degradation effect of micromolecules of high-temperature and high-pressure steam on the rubber sleeve is reduced or prevented, and the long-term efficacy of rubber sleeve sealing is improved.

The invention relates to the field of sealing, in particular to a rubber sleeve with a lower end sealing ring wrapped with a copper sheet, a packer and a bridge plug, wherein the rubber sleeve can bear high temperature and high pressure in the oil exploitation industry. The lower end sealing ring of the rubber sleeve is wrapped with the first copper sheet. The upper surface, the lower surface, the inner side face and the outer side face of the lower end sealing ring are wrapped with the first copper sheet. The thickness of the first copper sheet is set according to the standards that when the upper end bears the first axial pressure, the lower end sealing ring deforms in the radial direction so that the portion, distributed on the inner surface of the lower end sealing ring, of the first copper sheet can abut against a central pipe, and the portion, distributed on the outer surface of the lower end sealing ring, of the first copper sheet can abut against a casing. According to the rubber sleeve, the packer and the bridge plug, the lower end sealing ring is wrapped with the first copper sheet, the degradation function of small molecules of high-temperature and high-pressure steam to the rubber sleeve is reduced or prevented, and the long-term effect of sealing of the rubber sleeve is improved.

The embodiment of the invention relates to the technical field of heat dissipation, and particularly discloses an electronic device which comprises a shell, a heating element, a centrifugal fan and a flow guide assembly. The shell is provided with an accommodating space, and the shell has a heat-conducting property; the heating element is located in the accommodating space, the heating element is installed on the inner surface of the shell, and the heat generated when the heating element works is conducted to the shell; the centrifugal fan is mounted on the outer surface of the shell; the flow guide assembly is arranged on the outer surface of the shell and is provided with a plurality of heat dissipation channels, the heat dissipation channels are distributed around the centrifugal fan, and wind generated by the centrifugal fan can be dispersed through the heat dissipation channels, wherein the shapes of the plurality of heat dissipation channels are the same as the flow field of the wind generated by the centrifugal fan. Through the above mode, the embodiment of the invention can realize smaller wind resistance and a good heat dissipation effect in a limited thickness space.

The invention relates to the field of sealing, in particularly to a rubber sleeve which can bear high temperature and high pressure and comprises a metal wire sealing ring, a packer and a bridge plug used in the oil exploitation industry. The rubber sleeve comprises the metal wire sealing ring and a fiber wire sealing ring, wherein the metal wire sealing ring and the fiber wire sealing ring abut against each other and are arranged on the lower portion. The metal wire sealing ring comprises a plurality of mutually intersecting metal wires and glue bonding the metal wires together. The fiber wire sealing ring comprises a plurality of fiber wires which mutually intersect and resist high temperature and high pressure and glue bonding the fiber wires together. When the metal wire sealing ring is arranged below the fiber wire sealing ring, axial pressure transmitted to the fiber wire sealing ring can be reduced due to the friction between the metal wire sealing ring and a central pipe and / or a sleeve pipe, and at the time axial pressure on the fiber wire sealing ring can be effectively reduced. The reason for generation of shoulder protrusion is too large axial pressure, so that generation of shoulder protrusion can be reduced or prevented through the design.

The invention relates to the technical field of rotating drum vacuum valves and particularly discloses a device and method for eliminating a displacement gap of a rotating drum vacuum valve element. The device comprises gaskets A installed on the upper surface and the lower surface of a cam, and gaskets B installed between a valve base and a valve element assembly, wherein the cam is installed between the upper end of the valve element assembly and a valve body; the stainless steel gaskets A which are the same in diameter and different in thickness are installed between the upper surface of the cam and the contact surface of the valve body as well as between the lower surface of the cam and the upper end contact surface of the valve element assembly, so that a proper gap is reserved between the cam and the valve body as well as between the cam and the valve element assembly; and the stainless steel gaskets B which are the same in diameter and different in thickness are installed between the valve base and the contact surface of the valve element assembly, so that a proper gap can be reserved between the valve base and the valve element assembly. By means of the device and method, by means of verification of 500 times of valve opening and closing action tests of front installation, inverse installation and side installation of valves, the leakage problem, caused by axial displacement of the valve element assembly, of a valve passageway is thoroughly avoided.

The invention relates to the field of sealing, in particular to a rubber cylinder with a lower sealing ring coated with upper and lower copper skins, a packer and a bridge plug at high temperature and high pressure in petroleum production industry. A first copper skin is coated at the exterior of the lower sealing ring of the rubber cylinder, and consists of an upper copper skin and a lower copper skin; the upper copper skin is coated on the upper surface, outside surface and inside surface of the lower sealing ring; the lower copper skin is coated on the lower surface, inside surface and outside surface of the lower sealing ring; the upper copper skin and the lower copper skin are overlapped on the inside surface and outside surface of the lower sealing ring. The rubber cylinder has the advantage that the lower sealing ring is coated by the first copper skin, so that the degrading function of high-temperature and high-pressure steam small molecules on the rubber cylinder is reduced or prevented, and the sealing validity of the rubber cylinder is improved.

The invention discloses an automatic opening and closing door of a wire twisting machine. The automatic opening and closing door comprises a guide rail (1), a slider (3), a sliding seat (4), a movabledoor (2), at least two parallel ejector rods (11), a first cylinder (8), a second cylinder (20) and a third cylinder (7), the guide rail (1) is fixed onto a top plate in a box, the slider (3) is clamped on the guide rail (1) and can slide along the guide rail (1), the sliding seat (4) is horizontally arranged and fixedly connected with the slider (3), the movable door (2) is positioned on the outer side of the sliding seat (4), the ejector rods (11) are hinged to the upper portion of the inner side of the movable door (2) and the lower portion of the sliding seat (4), a cylinder of the firstcylinder (8) is fixed onto the lower portion of the sliding seat (4), a telescopic rod of the first cylinder (8) is connected with the ejector rods (11), the second cylinder (20) is horizontally arranged on the lower portion of the inner side of the movable door (2) and used for pushing the movable door (2) to move outwards, and the third cylinder (7) is used for driving the slider (3) to slide along the guide rail (1). The automatic opening and closing door effectively solves the problems that a door is not conveniently opened and closed and the like. The invention further discloses the wiretwisting machine comprising the automatic opening and closing door.

The invention relates to the field of processing of stomach-tonifying dendrobium flower / sweet-scented osmanthus flavored white tea, and discloses a processing method of the stomach-tonifying dendrobium flower / sweet-scented osmanthus flavored white tea. The processing method comprises the following steps: firstly, selecting one-bud and one-leaf initially-developed fresh white tea leaves or one-bud and two-leaf initially-developed fresh white tea leaves, and carrying out heating and withering, wherein spreading and airing thickness is 2-3cm, a temperature is 20-25 DEG C, relative humidity is 65-75%, and withering lasts for 28-30 h; carrying out secondary withering, wherein a withering temperature is controlled to be 35-40 DEG C, the relative humidity is controlled to be 45-55%, withering time is 10-12 h, the withering is divided into two stages, the temperature of an early stage is slightly low, and the temperature of a later stage is slightly high; and spraying stomach-tonifying liquid into the white tea for treatment for 35-40 min, sending the white tea leaves having undergone withering into a drying tank for drying for the first time, automatically drying and sieving the white tea, and allowing the white tea to uniformly fall into a bamboo basket. According to the invention, a temperature in the drying tank is also reduced while the white tea is spread for cooling, a good environment is provided for secondary drying, and energy is conveniently recycled; and automatic integration is adopted, so manual labor is reduced, and meanwhile, the efficiency of a white tea processing process is also improved.