2221 results about "Small hole" patented technology

The invention provides a leakage point pressure difference response high-strength blocking agent based on iron ion dynamic cross-linked latex and a preparation method thereof, and the raw materials comprise the following components in parts: 60-120 parts of latex, 60-120 parts of deionized water, 5-15 parts of an activator, 5-10 parts of a defoamer, 100 parts of a terminator, 100 parts of a stabilizer, 10 parts of a 20% ferric chloride solution, and the balance of water. Rubber particles are dynamically crosslinked through ferric ions, and the plugging strength is remarkably improved. Compared with a traditional differential pressure plugging agent, the plugging strength for small holes with the diameter of 0.5 mm reaches 35.67 MPa and is improved by about 238%, and the plugging strength for large holes with the diameter of 1 mm reaches 9.68 MPa and is improved by about 428%. And the plugging device is suitable for plugging conditions with higher leakage point pressure difference. In addition, the plugging agent can realize rapid and high-strength plugging of an underground pipe column, and provides a more efficient and more reliable solution for well site construction.

The utility model discloses a deep ring inner diameter precision measuring device which comprises a fixed rod, a movable rod and a check gauge, the fixed rod and the movable rod are connected through a rotating shaft to form an equal armed lever mechanism, the left end of the fixed rod is provided with a measuring head, and the right end of the fixed rod is provided with a dial indicator through a meter fixing handle; the left end of the movable rod is provided with a measuring head, the right end of the movable rod is in contact with the head of the dial indicator, a tension spring is arranged between the fixed rod and the movable rod, and the check gauge is a special standard comparison ring for checking the zero position. According to the utility model, precise measurement of the inner diameter of the deep inner ring can be effectively implemented, and the problem that a general inner hole measuring device cannot avoid interference of an external small hole to detect an inner ring groove is simply, conveniently and economically solved.

The invention relates to a hard and brittle material large depth-diameter ratio small hole laser milling-precision grinding process and a device thereof.The method comprises the steps that firstly, a mapping relation between an inlet aperture and laser parameters is established through a response surface method, laser machining parameters are determined, and laser machining parameters are obtained on the basis of an optical image acquisition system; a pulse laser is adopted to prepare the large-depth-diameter-ratio micro through hole with the accurate and controllable ablation amount, the grinding amount is reduced, meanwhile, the strength, hardness or fracture toughness of materials at the machining position is reduced, and therefore the grinding force for machining hard and brittle materials and tool abrasion are reduced; and secondly, machining damage such as microcracks, recast layers and taper caused by laser machining is removed through grinding machining, and the machining quality of the small hole with the large depth-diameter ratio is improved. The device mainly comprises a machine body, a workbench, a laser machining main shaft, a grinding machining main shaft, a differential interference difference microscope, an optical CCD camera and an X-axis and Y-axis servo driving module, different machining processes and in-situ detection can be completed on the same machine tool, the problems of secondary clamping, poor repeated positioning precision and the like of workpieces are solved, the machining efficiency is improved, and the machining cost is reduced. According to the method, bottom hole laser machining of the hard and brittle materials is highly combined with grinding hole repairing and hole expanding, high-quality and high-efficiency machining of the hard and brittle materials is achieved, tool abrasion is reduced, and the machining cost is reduced.

The invention discloses a methanol direct injection injector, comprising: an injector body and a solenoid valve component, an orifice plate, a control valve seat and a needle valve component which are installed below the injector body through a tight cap of the injector body; wherein the solenoid valve component is located above the orifice plate, the orifice plate is located above the control valve seat, and the control valve seat is located above the needle valve component; a first and a second straight hole are arranged on the orifice plate, an inclined hole, a third straight hole and two small holes are arranged on the control valve seat, a needle valve component control chamber is arranged on the upper part of the needle valve component, the lower end of the first straight hole is communicated with the lower end of the second straight hole on the orifice plate and the upper ends of the inclined hole, the third straight hole and the two small holes on the control valve seat, and the lower ends of the inclined hole, the third straight hole and the two small holes on the control valve seat are communicated with the needle valve component control chamber; the opening and closing of the second straight hole on the orifice plate is controlled by turning on and off the power of the solenoid valve component, and then the methanol liquid pressure in the control chamber of the needle valve component is controlled to realize the start of the needle valve component injection.

The utility model discloses a leveling mechanism of an airing rack assembly of a clothes airing system. The leveling mechanism comprises the airing rack assembly, two steel wire ropes and two adjustable assemblies. The adjustable assembly comprises a steel wire rope fixing piece and an adjusting bolt. The tail end of the steel wire rope is provided with a plug with the diameter larger than that of a steel wire rope body. The steel wire rope fixing piece is provided with a connecting hole, the connecting hole comprises a large hole part and a small hole part which are transversely communicated, the steel wire rope penetrates through the large hole part and then transversely moves to enter the position where the steel wire rope penetrates through the small hole part, and the plug is blocked by the edge of the small hole part and limited to the lower side of the steel wire rope fixing piece; the adjusting bolt penetrates through the large hole part to be screwed on the airing rack assembly and limits transverse movement of the steel wire rope, and vertical displacement between the adjusting bolt and the steel wire rope fixing piece is limited through the limiting assembly; the tail end of the steel wire rope is limited and fixed with the steel wire rope fixing sheet; by screwing the adjusting bolt, the height of the steel wire rope fixing piece relative to the airing rack assembly is adjusted, and therefore leveling of the airing rack assembly is achieved; the device has the advantages of simple structure, convenience in installation and labor-saving and convenient height adjustment.

The invention relates to the technical field of steel pipe machining, and discloses a continuous punching device for steel pipe machining and a using method thereof.The continuous punching device for steel pipe machining comprises a workbench and further comprises an L-shaped frame which is arranged at the top of the workbench in a sliding mode; the supporting and clamping assembly is arranged at the top of the workbench, and the supporting and clamping assembly is used for supporting and clamping the steel pipe; the drilling assembly is arranged on the transverse edge of the L-shaped frame, and the drilling assembly is used for drilling the steel pipe; and the hole grinding assembly is arranged on the drilling assembly, and the hole grinding assembly is used for removing burrs adhered to the drilled hole in the steel pipe. Before drilling, the drill rod can drill a small hole in the steel pipe to eliminate stress generated during subsequent drilling of the drill cylinder, the situation that the steel pipe cracks during drilling is avoided, burrs on the hole formed in the steel pipe can be ground and removed, drilling and burr cleaning are convenient and fast, and the using effect of the equipment is improved.

The invention discloses a solid waste recycling forming machining die, and relates to the technical field of bicycle production waste reutilization, the solid waste recycling forming machining die comprises a lower die mechanism, an upper die mechanism is arranged on the lower die mechanism, a pressing mechanism is arranged on the upper die mechanism, and a male die set is arranged in the middle of the bottom wall of an upper die base; the material pressing mechanism comprises a first spring and a material pressing plate which are arranged on the upper die base, and further comprises an elastic ejector block set arranged on the material pressing plate and a guide hole site set formed in the material pressing plate in an up-down penetrating mode. The die has the advantages that the same die carries out stepped continuous punching operation, punching stress can be reduced, and the probability of deformation of the disc brake during punching is reduced; residual stress existing in the punched disc brake disc can be redistributed through attaching and pressure maintaining, and the situation that due to the fact that large holes and small holes in the disc brake disc are evenly and densely distributed in position, local deformation is generated is prevented; and the elastic ejector block group applies uniform elastic pressing force to the disc brake disc, so that the probability of deformation of the disc brake disc during rigid demolding is reduced.

In order to solve the problems that in the prior art, an engine connecting rod big and small hole machining method is low in machining efficiency, material taking or discharging is difficult, clamping and positioning are difficult, and the like, the utility model provides a disc type engine connecting rod big and small hole machining device. The device comprises a rack, a turntable, a stabilizing mechanism, a clamping mechanism, a drilling combined drilling tool, an upper chamfering combined drilling tool and a lower chamfering combined drilling tool, the rack is of a rectangular frame structure; the turntable is disc-shaped, and is rotatably fixed at the geometric center of the working table plate by taking the disc-shaped center as an axis; more than three stabilizing mechanisms are circumferentially and uniformly distributed on the outer side of the edge of the turntable; the number of the clamping mechanisms is six, and the six clamping mechanisms correspond to six stations of loading, drilling, upper chamfering, lower chamfering, cleaning and unloading respectively. The drilling and chamfering machine has the advantages that drilling and chamfering can be conducted at the same time, and machining efficiency is improved; and the clamping mechanism with a mold pressing structure is adopted, so that clamping is accurate and stable, and loading or unloading is facilitated.

The utility model provides a chair capable of being quickly assembled and disassembled, which comprises two supporting leg assemblies, a chair body and a chair body, each supporting leg assembly comprises a side frame and a supporting leg arranged at the bottom of the side frame, the rear side of each side frame is provided with a positioning part and a first through hole, and the front side of each side frame is provided with a second through hole; gourd-shaped holes matched with the positioning parts are formed in the two sides of the back frame respectively, and each gourd-shaped hole is provided with a large hole and a small hole which are communicated with each other; two first fixing pins matched with the first through holes are arranged at the bottom of the back frame, and meanwhile a third through hole is further formed in the bottom of the back frame. Two second fixing pins matched with the second through holes are arranged on the front side of the seat plate, and third fixing pins matched with the third through holes are arranged on the rear side of the seat plate; according to the utility model, through a simple assembly structure and convenient assembly steps without any tool assistance, the storage size and the assembly convenience are considered at the same time, and the problem that the storage size and the assembly convenience of the fixed chair cannot be considered at the same time in the prior art is solved.

The invention discloses a manufacturing method of a back-drilling solder-resistant plug hole, which comprises the following steps: drilling holes on a production board and metalizing the holes, the drilled holes comprising a first through hole and a second through hole, the first through hole comprising a small hole with the aperture of less than or equal to 0.35 mm and a large hole with the aperture of more than 0.35 mm, and the two surfaces of the production board being a first surface and a second surface respectively; manufacturing an outer layer circuit on the production board; performing depth-controlled back drilling at the second through hole, wherein the back drilling holes in the first surface and the second surface are respectively a first back drilling hole and a second back drilling hole; enabling the first surface of the production board to face upwards, and performing resin hole plugging on the first back drilling hole and the small hole; enabling the second surface of the production board to face upwards, and performing resin hole plugging on the second back drilling hole and the large hole; and carrying out silk-screen printing of solder resist ink on the production board, and carrying out pre-baking, exposure and development in sequence, so that the resin in the plug hole is cured and a surface solder resist layer is prepared. According to the method, the exposure and development times are reduced, the bad problem caused by multiple times of silk-screen hole plugging is solved, and the production efficiency and the production quality are improved.

The utility model relates to the technical field of water conservancy construction, and discloses a riverway closure device for water conservancy construction, which comprises a fixing frame, a sliding chute I is arranged on the rear side of the inner wall of the fixing frame, a sliding strip I is connected to the inner side of the sliding chute I in a sliding manner, and a small hole plate is fixedly connected to the front side of the sliding strip I; a plurality of first springs are fixedly connected to the front side of the small hole plate at equal intervals, a large hole plate is fixedly connected to the front ends of the first springs, a mounting frame is fixedly connected to the outer side of the fixing frame, a large water pump is fixedly connected to the top of the mounting frame, and the input end of the large water pump communicates with a water inlet pipe; the output end of the large water pump communicates with a water drainage pipe. According to the utility model, when deadwood trees collide with the large-hole plate, the spring I is extruded and drives the large-hole plate to retract inwards, the plurality of large water pumps are started to operate, river water is discharged through the drainage pipe, and the river flow closure work can be smoothly carried out.

The present invention relates to the technical field of casting of automotive parts, and specifically to a casting sand mold forming device and method for automotive parts. An upper microporous plate and a lower microporous plate are arranged at intervals up and down in the air guiding flow channel. The lower microporous plate is located in the air guiding flow channel, and the upper microporous plate is pressed on the stepped surface communicating between the annular groove and the air guiding flow channel. The upper microporous plate and the lower microporous plate are connected by multiple groups of air pipes. The beneficial effects are as follows: By adding a pouring and ramming component to the existing casting process, multiple groups of sand injection channels can be used to selectively choose the sand injection position, and the sand injection position can be selected according to the characteristics of the model part to ensure complete filling of the small holes and grooves. At the same time, the air guiding flow channel is used to further carry out negative pressure air extraction on the sand mold after extrusion and compaction, reduce the gap between the sand bodies, improve the overall ramming strength, ensure the integrity of the sand mold after overall demolding, avoid collapse, and greatly improve the qualified rate.

The invention relates to the field of angle valves, in particular to an anti-surge and anti-blocking angle valve. The angle valve comprises a valve body, a valve cover, a sleeve, a valve element and an executing mechanism. The valve body is provided with a middle cavity, an inflow runner and an outflow runner, the valve cover covers the end part, far away from the inflow runner, of the middle cavity; the sleeve is installed in the middle cavity and coaxially arranged with the inflow runner, the sleeve is provided with a small hole section and a large hole section in the axial direction, a plurality of small liquid outlet holes are formed in the peripheral wall of the small hole section, a plurality of large liquid outlet holes are formed in the peripheral wall of the large hole section, and the small hole section is closer to the inflow runner than the large hole section; the valve element is installed in the sleeve in a sliding mode and can slide back to the inflow runner to avoid part of the large liquid outlet holes. The executing mechanism is connected with the valve element and used for driving the valve element to move towards the inflow runner to close the inflow runner and driving the valve element to move back to the inflow runner to open the inflow runner. Vibration and noise of fluid in the angle valve can be effectively reduced, surge of an applied pipeline is prevented, and vibration reduction, noise reduction and blockage prevention are both considered.

The utility model belongs to the technical field of additive manufacturing, and discloses an air outlet mechanism and additive manufacturing equipment. The air outlet mechanism comprises an air inlet assembly and a rectifying part, the air inlet assembly comprises an air inlet channel, one end of the air inlet channel is connected with an air source, and the other end of the air inlet channel is communicated with an air bellow; the rectifying part is arranged in the air inlet channel and is perpendicular to the air inlet direction in the air inlet channel, a first hole set and second hole sets located on the two sides of the first hole set are formed in the rectifying part, the hole diameter of the first hole set is larger than that of the second hole sets, and air entering the air inlet channel from the air source enters the air bellow after passing through the first hole set or the second hole sets. The air speed of the air close to the pipe wall of the air inlet channel is higher, the second hole set with the smaller hole diameter is arranged to rectify the part of the air, the air flowing through the rectifying piece is uniform in overall air speed, and therefore the quality of a printed piece is improved.

The invention provides a ball joint mechanism with a compact structure, which comprises a solid ball body and a shell capable of accommodating the ball body, and a ball handle is arranged at the upper part of the ball body; a stepped through hole is formed in the position, corresponding to the ball handle, of the ball body, the stepped through hole is composed of a small hole section and a large hole section, the small hole section is a threaded hole, the large hole section is an unthreaded hole, an opening of the small hole section faces upwards and is located on the ball handle, and an opening of the large hole section faces downwards and is located on the spherical surface of the ball body; an adjusting screw plug, a spring and a plunger are sequentially installed in the stepped through hole from top to bottom, one part of the adjusting screw plug is in threaded fit with the small hole section, the other part of the adjusting screw plug is located in the large hole section, the outer side end of the plunger can extend outwards from an opening of the large hole section under the elastic force action of the spring, and the end face of the outer side end of the plunger is a spherical surface; a curved surface seat is arranged on the lower portion of the shell, the curved surface seat is provided with an inner concave surface, and the outer side end face of the plunger is in contact fit with the inner concave surface of the curved surface seat. The ball body in the structure can obtain large damping feeling during rotation and is very smooth during rotation.

The invention belongs to the technical field of construction of end walls of ultra-large-span loess tunnels, and particularly relates to a dovetail section tunnel face plugging structure and a construction method. Comprising a blocking structure outside the excavation range of two small holes in a large tunnel hole and a supporting structure in the excavation range of the small holes. The blocking structure sequentially comprises a drainage system, a steel supporting structure, a reinforcing anchor rod, a first reinforcing mesh and a first sprayed concrete layer from inside to outside in the tunneling direction of the tunnel. The supporting structure comprises a second sprayed concrete layer, anchor rods and a second reinforcing mesh; the forked tail section tunnel face plugging structure is easy to construct, the plugging structure in a large tunnel hole is easy and convenient to install, all structural layers are high in connectivity and good in integrity, and the supporting effect is remarkable; the drainage system is convenient to install and can meet the drainage requirement under the water-rich stratum; the reinforcing anchor rod can be suitable for unfavorable geology reinforcement construction; the construction method of the forked tail section tunnel face blocking structure is convenient and fast in construction, the blocking structure is safe and reliable, and a hole is easy and convenient to break.

The invention discloses a linkage device, an integrated main control unit and an ABS brake system.The linkage device comprises a valve body, a piston assembly and a one-way sealing element, the valve body comprises a first cavity, a second cavity and a second oil way, and the first cavity is communicated with the second oil way and the second cavity; the piston assembly slides in the first cavity in a reciprocating mode along the axis, part of the piston assembly can enter the second oil way, a gap is formed between the piston assembly and the valve body, a plurality of small holes are evenly formed in the side wall of the piston assembly, the piston assembly is provided with an elastic element, and the one-way sealing piece is arranged in the annular groove of the valve body and located on the outer side wall of the piston assembly. The one-way sealing piece is in sliding connection with the piston assembly, and the one-way sealing piece and the small holes jointly serve as a structure for controlling opening and closing of the internal liquid channel. The linkage device solves the problems that in the prior art, a one-way oil seal of a linkage device is prone to failure, the pressure relief hole diameter is too small, and then the efficiency and safety of a braking system are affected.

The invention discloses an automobile pedal with sole decontamination, sterilization and cleaning functions, which comprises an aluminum alloy bottom groove, a plurality of dirt discharge holes are formed in the aluminum alloy bottom groove, the surface of the aluminum alloy bottom groove is sleeved with a strong water-absorbing decontamination pad, a protruding cleaning head is arranged on the surface of the strong water-absorbing decontamination pad, and the aluminum alloy bottom groove is internally provided with a plurality of dirt discharge holes. A panel is arranged on the surface of the strong-water-absorption decontamination pad, a plurality of inclined-edge holes are formed in the panel, and small sewage draining holes are formed in the edges of the inclined-edge holes; an edge covering strip is arranged on the side surface of the aluminum alloy bottom groove, a plug is arranged on the side surface of the aluminum alloy bottom groove, and a support is connected to the aluminum alloy bottom groove through screws. And by arranging the cleaning head and the small sewage discharging holes, the shoe sole cleaning function can be provided, so that people are helped to reduce bacterium breeding, and environmental sanitation and cleanliness in an automobile are guaranteed.

The present invention discloses a concentrated water regulating valve, comprising: a valve body, which has a water inlet, a water outlet and a discharge port, and a valve cavity is formed inside the valve body; a partition component, which is arranged in the valve body and divides the valve cavity into a first cavity and a second cavity, and a hole system penetrating the first cavity and the second cavity is opened on the partition component, the water inlet and the water outlet are connected to the first cavity, and the discharge port is connected to the second cavity; a valve core, which is arranged in the second cavity to change the flow cross section of the hole system; wherein: the first cavity is arranged as a columnar cavity; at least the water inlet is extended to the first cavity along the tangential direction so that the concentrated water enters the first cavity through the water inlet and then flows in a rotation. By extending the water inlet to the first cavity along the tangential direction, the hole system is continuously flushed to a large extent, and thus the hole system can be effectively prevented from being blocked due to crystallization, especially the end of the hole system where the hole opening is smaller can be effectively prevented from being blocked.

The underwater automatic feeding device comprises an aquaculture net cage and a buoyancy box, rotating shafts are arranged on the two sides of the aquaculture net cage, a first through hole is formed in the rotating shaft on one side, and an aquaculture platform working deck is fixed to the buoyancy box; a heat dissipation structure for dissipating heat in the buoyancy tank is arranged on one side of the breeding platform working deck, a feed bin structure is fixed to the bottom in the buoyancy tank, a stirring structure is arranged in the buoyancy tank to stir feed in the feed bin structure, and a first small hole is formed in the lower portion of the side, close to the end face of the net cage, of the buoyancy tank; the inner side of the first small hole is connected with a discharging pipeline on the stock bin structure, the outer side of the first small hole is connected with a feed conveying pipeline, one end of the feed conveying pipeline penetrates through the first through hole and is located in the breeding net cage, and the breeding platform working deck is further provided with a feeding device console. The labor intensity of breeding personnel can be reduced, the operation process of overturning the net cage is simplified, and the occupied space of the breeding device is reduced.

The invention discloses an auxiliary cylinder device for active air suction and blowing and a control method thereof.The auxiliary cylinder device is used for being installed on a main cylinder structure to restrain flow-induced vibration of the main cylinder structure and comprises a rotating assembly, an auxiliary round rod and a fixing mechanism; the rotating assembly is used for being installed on a main cylindrical structure and can rotate in the circumferential direction of the main cylindrical structure. The auxiliary round rod is fixed to the rotating assembly through a fixing mechanism and can rotate in the circumferential direction of the main cylindrical structure along with the rotating assembly. The auxiliary round rod is a hollow rod, is provided with a plurality of small holes in the longitudinal direction, and is used for sucking and blowing air through the small holes to achieve disturbance and even damage of the trailing vortex of the main cylinder structure. According to the auxiliary cylinder device for active air suction and blowing and the control method of the auxiliary cylinder device, by arranging the rotating assembly, the auxiliary round rod and the fixing mechanism, flow-induced vibration of the main cylinder structure can be effectively restrained, fatigue damage caused by vibration is avoided, and the service life of the auxiliary cylinder device is effectively prolonged.

The invention provides a pulverizer and belongs to the technical field of pulverizing equipment, the pulverizer comprises a base and a pulverizing device, the pulverizing device comprises a cylinder horizontally and fixedly arranged on the base and a transmission shaft rotationally penetrating through the cylinder, a feeding port is formed in the top of the left end of the cylinder, a discharging port is formed in the bottom of the right end of the cylinder, and a screen covering the discharging port is arranged on the cylinder; a fan, a first-stage crushing mechanism and a second-stage crushing mechanism are sequentially and fixedly arranged on the transmission shaft from left to right, the fan is located on the left side of the feeding port, the second-stage crushing mechanism is located above the screen, the barrel comprises a large-hole section and small-hole sections located on the two sides of the large-hole section, and an annular groove is formed in the middle of the inner side of the large-hole section; and the first-stage crushing mechanism comprises a crushing cutter positioned in the large-hole section. When airflow drives the materials to move to the large hole section, the materials impact the first-stage smashing cutter and then fall, the raising assembly can raise the materials falling to the bottom of the barrel, and the situation that the materials falling to the bottom of the barrel cannot be smashed by the first-stage smashing cutter is avoided.

The drilling machine comprises a machining table, stand columns are connected to the four corners of the bottom of the machining table, a guide rod is connected to the left side of the top of the machining table, a vertical base is movably arranged outside the guide rod in a sleeved mode, a limiting vertical groove is formed in the right side wall of the vertical base, and a lead screw is rotationally connected into the limiting vertical groove; the upper end of the lead screw is connected with a lead screw motor, the outer wall of the lead screw is in threaded connection with a nut seat, the right end of the nut seat is connected with a lifting table, the right side of the top of the lifting table is connected with a steering motor, the output end of the bottom of the steering motor is connected with a steering shaft, and the lower end of the steering shaft is connected with a horizontal arm. A mounting frame is slidably connected to the exterior of the horizontal arm, and a drilling machine is connected to the lower end of the mounting frame; the utility model has the advantages of reasonable structural design, convenience in subsequent assembly and use, small hole position error, convenience and practicability.

The utility model discloses a special glass slide for a stimulated Raman scattering imaging microscope, which comprises a glass slide, a cover glass and a buckle, the glass slide is in limit connection with the cover glass through the buckle, a sample groove is arranged on the glass slide, the cover glass covers the sample groove, so that a cavity is formed between the glass slide and the cover glass, and the sample groove is arranged in the cavity. And the side surface of the glass slide is provided with at least two small holes which are directly communicated with the inner cavity of the sample groove. According to the utility model, water evaporation can be prevented, bubbles can be avoided, water can be replenished without uncovering the cover glass, and laser is ensured to be focused on the same plane of a sample during imaging.

The utility model relates to the technical field of daily utensils, in particular to a suction nozzle without a valve. A valve-free suction nozzle comprises a hollow suction nozzle body, a water outlet channel is formed in the hollow position of the suction nozzle body, an air return channel is formed in the side portion of the suction nozzle body, and an air return structure is arranged on the lower portion of the air return channel to divide the air return channel into an upper air return channel and a lower air return channel. The air return structure is of an inverted trapezoidal structure so that the caliber of the lower portion of the upper air return channel can be gradually decreased from top to bottom, the air return structure is provided with at least one hole, and a water tank is formed between the channel wall of the lower air return channel and the air return structure. The exhaust function of a traditional air return valve is achieved through the design of the large hole, and compared with a traditional V valve, air inlet is smoother. By means of the tension properties of the small holes and water, the function of preventing water leakage when the water cup is inverted can be achieved. The suction nozzle is provided with a through hole and is in a flat runway circle shape, fan-shaped water outlet can be achieved during water outlet, and the problem that the throat is impacted cannot occur.

The invention provides an electric spark machining method for a deep and narrow vent groove of a guide vane and the guide vane. The method comprises the following steps that firstly, electric spark high-speed small hole machining is adopted, and a plurality of bottom holes are machined in the guide vane to be machined through a first electrode; a second electrode is manufactured, and the forming electrode and the corresponding clamping auxiliary part are installed on the electric spark forming machine; and electric spark forming oil immersion machining is adopted, lateral flushing liquid of the guide vane to be machined is increased, machining parameters of an electric spark forming machine are set, and deep and narrow vent grooves are machined. Part of the bottom holes are pre-machined in the position to be machined in the guide vane, the deep and narrow vent grooves are machined in the bottom holes through the method that the hollow forming electrode is used for machining the forming grooves in an electric spark forming mode, and the oil flushing and chip removal conditions during forming of the deep and narrow vent grooves are improved; and the electric spark forming machining efficiency and the surface machining quality of the guide vane are improved. And the device can be applied to machining of various deep holes, grooves and runners, and is good in applicability.

A mobile phone shell capable of opening a package comprises a side plate and a bottom plate, at least one small hole is formed in the side plate, at least one box opening tool clamped between a mobile phone and the mobile phone shell stretches out and retracts through the small hole, finger operation holes are formed in the position, corresponding to the small holes, of the bottom plate, and the finger operation holes correspond to the small holes. And the box opening tool is partially exposed to be operated by fingers, so that the box opening tool is moved to stretch out and draw back.

The utility model discloses a clamp capable of quickly moving in place and clamping. The clamp comprises a bottom plate, a self-locking rod, a sliding shaft, a movable jaw, a fixed jaw and a clamping seat, the fixed jaw and the clamping seat are both fixedly installed on the bottom plate, the sliding shaft penetrates through the clamping seat to be connected with the movable jaw, the movable jaw is arranged on the bottom plate in a sliding mode, a spring pressing plate is arranged in the clamping seat, a rectangular spring is arranged between one side of the spring pressing plate and the clamping seat, and the rectangular spring is connected with the movable jaw. An eccentric clamping shaft is arranged between the other side of the spring pressing plate and the clamping base, the eccentric clamping shaft is connected with a self-locking rod, an eccentric cam is installed on the eccentric clamping shaft, a small hole is formed in the clamping base, an adjusting jackscrew is installed in the small hole, and one end of the adjusting jackscrew abuts against the spring pressing plate. The clamping and self-locking device can be quickly moved in place, the clamping and self-locking requirements can be conveniently met, the labor intensity is reduced, and the machining efficiency is improved.

The utility model discloses an S-shaped swash plate structure of a C-shaped liquefied natural gas (LNG) ship liquid cargo tank, relates to the technical field of C-shaped LNG ship liquid cargo tanks, and is used for solving the problem of LNG sloshing in the C-shaped LNG ship liquid cargo tank. The left view of the swash plate body is S-shaped, the front view of the swash plate body is circular, an opening is formed in the swash plate body, the front view diameter of the swash plate is consistent with the inner diameter of the LNG ship liquid cargo tank, and the edge of the swash plate extends to serve as a connecting part and is connected to the tank wall of the LNG ship liquid cargo tank through bolts. Two S-shaped swash plates are arranged in the liquid cargo tank and symmetrically arranged on the inner wall of the C-shaped LNG ship liquid cargo tank, the distance between each S-shaped swash plate and the center of the LNG ship liquid cargo tank is 0.25 times of the total length of the LNG ship liquid cargo tank, and the aperture of each swash plate is 0.5 m. After the C-shaped LNG ship cargo tank oscillation suppression device is adopted, liquid is blocked by the oscillation suppression plate, oscillation is reduced, the liquid can freely flow through a small number of small holes in the oscillation suppression plate, the phenomenon that the oscillation is more violent due to liquid accumulation is avoided, and the oscillation suppression effect on the C-shaped LNG ship cargo tank is remarkable.

The invention provides a drilling processing method for a ceramic substrate. The drilling processing method for the ceramic substrate comprises the following steps: forming a large hole in the ceramic substrate by adopting laser drilling, wherein the aperture of the large hole is 0.25-5mm or is 0.5 times greater than the thickness of the ceramic substrate; filling the macropores with a composite material containing a ceramic filler and thermosetting resin, and forming a supporting layer through a curing process; and the supporting layer is mechanically drilled to form small holes, and the hole diameter of the small holes is smaller than that of the large holes. According to the ceramic substrate drilling machining method, through stepped drilling of laser taper hole guiding, composite material filling and mechanical precision drilling, the problem that small holes of a thin substrate are prone to cracking during machining is solved, the yield is increased, the risk of breakage of a hard drill bit for mechanical drilling can be reduced, machining time is shortened, and the production cost is reduced; the drilling processing method is compatible with various ceramic substrates, and can solve the problem of multi-material integration of electronic packaging.