58 results about "Headed large" patented technology

Structure for securing a load detection element under a vehicle seat in combination with a support leg element having a hole formed in one end portion thereof, wherein the load detection element is pivotally connected with the support leg element, while being fixedly secured by first and second securing pins to the vehicle seat. The first pin has an end riveted to a bottom side of the vehicle seat and an end portion extending through the hole of support leg element. Such another end portion has a head larger in diameter than that hole and is disposed outwardly under the support leg member, with one space given between the head and support leg member. The second pin has a end fused and fixed in the bottom side of vehicle seat and a head disposed beneath the load detection element, with another space given between the head and support leg member.

The present invention relates to flood discharge method and flood discharge tunnel dissipating energy by means of eddying flow and intense water-air mixing, and is especially one flood discharge tunnel for high water head large hydraulic power project. The flood discharge tunnel includes one water inlet in the upstream of dam, one eddy flow and fall head energy dissipating facility connected to the water inlet and provided with well, one water cushion pond with one waterproofing pier in the exit for further energy dissipating, one water output tunnel connected to the water cushion pond and one water outlet. The flood discharge tunnel has one energy dissipating rate as high as 90 %, and can control the outlet flow rate and prevent cavitation erosion, scouring and atomizing effectively.

The invention relates to a pretensioning clamp for heat treated steel bars with a high ratio of tensile strength to yield point and an application method thereof. The clamp is characterized in that: the clamp comprises a cylinder-shaped anchor ring; the internal diameter of the anchor ring is a taper hole; three clamping pieces mutually forming an angle of 120 degrees are provided in the taper hole; the outer wall of the big-head end of the clamping pieces is provided with a concave groove; an O-shaped sealing ring is arranged in the concave groove to allow the three clamping pieces to connect and form an integral body; the inner wall of each clamping piece is provided with screw teeth, and a radial cross section of the screw teeth is of a zigzag shape. The invention enables anchoring of steel bars with high ratio of tensile strength to yield point during tensioning to be well realized; the clamp has a great clamping force on the steel bars and high anchoring efficiency, and is repeatedly usable. The clamp can be widely used in pretensioning construction of prestressed concrete in the constructional field.

A bolt assembly for use with toilet seats and other objects consists of a threaded bolt with a threaded axial bore and a head larger than the opening in the toilet bowl flange, a nut sized to fit the bolt, and a screw dimensioned to cooperate with the bore. The bolt is inserted through the opening in the flange, extending there beyond. The bolt is secured from below the flange with the nut. The seat assembly is then placed on the flange so that the aperture in the seat assembly bracket communicates with the threaded bore. The seat assembly is secured in place by passing the screw through the aperture in the bracket and threading it into the bore. The seat assembly can then be reversibly removed for cleaning by merely removing and replacing the screw without having to reach under the flange. The screw can have a gripping head so that it can be rotated without the need for a screwdriver, or there can be a slot centered on the top of the head so that a screwdriver can be used. The slot can be sized to accept a screwdriver but such that it will not permit the screwdriver to slip sideways during use.

A method of installing a threaded fastener from one side of a hole through a substrate. The fastener includes a collar and a bolt having a head, a threaded tail portion and a tool engagement portion extending from the tail. The method includes: (a) engaging the tool engagement portion with a bolt engagement portion of a tool (b) passing the bolt through to the far side of the hole and supporting it there by way of the tool, (c) passing the collar through the hole while supporting it with the tool; (d) assembling the bolt and collar to form the threaded fastener having a head larger than the hole; (e) engaging a nut to tighten the fastener; and (f) detaching the tool from the fastener. Separation of the bolt engagement portion and the tool engagement portion is prevented by a moveable member, which engages both portions.

The invention discloses a device and method for machining high-speed turning multi-head large-lead deep-groove-type external threads. The device comprises a hollow cutter body. The cutter body is composed of a cutter installation part and a clamping part. A square hole and a screw hole communicated with each other are formed in the clamping part, wherein the square hole is used for clamping a cutter and the screw hole is used for fixing the cutter. The device further comprises a tip with end teeth. The tip with the end teeth comprises a hollow tip body. A fixing screw hole is formed in one end of the tip body. A positioning circular protrusion is formed at the other end of the tip body, wherein the diameter of the positioning circular protrusion is smaller than that of the tip body. The end teeth which are evenly distributed at the circumference are formed at the portion, arranged on the periphery of the positioning circular protrusion, of the tip body. The method comprises the following steps: (i) beginning, (ii) roughly turning an external circle, (iii) roughly turning the threads, (iv) half-finely turning the threads, (v) finely turning the threads, (vi) finely turning the external circle and (vii) finishing. According to the device and method for machining the high-speed turning multi-head large-lead deep-groove-type external threads, machining efficiency and the spiral surface quality of the multi-head deep-groove-type threads are greatly improved.

The invention discloses a polycrystalline diamond contact for a well drilling and rock crushing tool, which is a cylindrical body and comprises a polycrystalline diamond layer (1) and a matrix (2) compounded with the polycrystalline diamond layer (1). The matrix of the compact consists of the residual part of a convex curved surface after being cut along an inclined direction, the side face after cutting consists of an original cylindrical surface (2a) and a new convex curved surface (3), a body of the compact has a large end and a small end, wherein the end with the polycrystalline diamond layer (1) is the large end, and the other end is the small end. Compared with the conventional structure, the invention reduces the contact possibility of the side face of the compact and a rock (7). In addition, when the compact is worn during the cutting of the rock (7), the bearing area of the worn surface of the PDC compact can be reduced, and the specific pressure on the rock interacting with the worn surface of the PDC compact can be increased, thereby facilitating the strengthening of the capability of the compact to penetrate into the formation and improving the rock crushing efficiency of the drill bit.

The invention discloses a pile head large-diameter steel bar straightening device, comprising a bracket, an elevating mechanism, a hydraulic straightening device and a hydraulic power and control system. The hydraulic straightening mechanism comprises a straightening frame, a movable compression bar, and a hydraulic cylinder mounted in the straightening frame, wherein the middle part of the straightening frame is provided with a straightened steel bar insertion hole which is a through hole from top to bottom, the movable compression bar is inserted into the straightened steel bar insertion hole, and the travel direction of a piston rod of the hydraulic cylinder is perpendicular to the straightened steel bar insertion hole. In the whole steel bar straightening process, except for a carrying instrument and an operating instrument, the rest parts of the pile head large-diameter steel bar straightening device are mechanically operated, so that the pile head large-diameter steel bar straightening device has high degree of mechanization and can greatly save labor force and improve work efficiency.

The invention relates to a well head mobile anti-theft device mainly comprising parts, i.e. a conical seat type oil pipe hanger, a bottom ring flange, a well head large cross joint, an upper ring flange, a small tee joint, anti-theft strobes (i.e. a casing strobe and a production control strobe), a needle-shaped control valve, and the like, wherein the parts, i.e. the conical seat type oil pipe hanger, the bottom ring flange, the well head large cross joint, the upper ring flange, the small tee joint, and the like, are completely matched with parts a 250-type christmas tree generally used foran oil field. The anti-theft technique is used for the production management control function of a well head, thus the product has incomparable advantages compared with other similar products; the casing strobe and the production control strobe are manufactured by adopting the anti-theft technique; four sluice valves used in the oil production well head are all anti-theft sluice valves manufactured by the company and adopt two-stage anti-theft measures and omit hand wheels on appearance compared with the traditional 250-type strobe, the internal structures of the sluice valves can not be seenfrom external, and the anti-theft strobes can be opened only after an anti-theft cover is opened by a special spanner.

The invention discloses a sea tidal fall water pumping device comprising a fixing water cylinder, a float assembly capable of vertically moving and a water pipe; the float assembly is positioned above the fixing water cylinder, and is provided with a hollow floatation box; during ebb tide, the hollow cavity of the floatation box has sea water for increasing the weight of the floatation box; during ebb tide, the lower part of the float assembly is sealed with the upper part of the fixing water cylinder; one end of the water pipe is communicated with the lower part of the fixing water cylinder; and the other end of the water pipe extends out of sea level. The sea tidal fall water pumping device adopting such a structure can convey sea water to the position higher than the sea level without adopting external power, can overcome the multiple defects of the tidal power generation in the prior art, can change the low-water head large-flow power generation mode in the prior art, and can improve the environment of construction and foundation processing of the existing power generation station and the slit-prevention engineering project, thus reducing power generation investment, reducing power generation operation cost and achieving cleanliness and environment friendliness.

The invention provides a rapid retraction method for a belt conveyer and a tape handler for retraction, and belongs to the technical field of underground coal mine fully-mechanized excavation face belt conveyers. The problems that a traditional belt demounting process mainly depends on manual operation, so that the labor intensity is large, the retraction time is long, and the work efficiency is low are mainly solved. The rapid retraction method includes the steps of selecting subsection cut-off points or butt joint points, cutting off a belt, tape winding and recovering a belt piece. The rapid retraction method is characterized by comprising the following specific steps: (1) selecting the subsection cut-off points or the butt joint points; (2) cutting off the belt at the cut-off points; (3) retracting AC belt sections at the lower portions; (4) retracting AD belt sections, and meanwhile recovering an upper carrier roller; (5) retracting CD belt sections, and meanwhile recovering the belt piece; and (6) retracting a driving part and a belt conveyor head large frame after retraction of all belts is finished, and retracting the tape handler. The tape handler for retraction comprises a power device, a tape winding shaft and a machine frame. The tape handler is characterized by further comprising filter belt centering devices symmetrically arranged on stand columns of the machine frame.

The invention discloses an intelligent tension tool anchor capable of making penetration of prestressed reinforcing steel easy. The tool anchor comprises a tool anchor ring and tool jackets, circular-truncated-cone-shaped tool anchor eyes run through the tool anchor ring, the shapes of the tool jackets are matched with those of the inner walls of the tool anchor eyes, the tool jackets are sleevedwith the tool anchor eyes, and prestressed reinforcing steel engagement holes which are coaxial with the tool anchor eyes are formed in the tool jackets; the tool jackets are formed by circumferentially assembling at least two tool clamping pieces, clamping piece lifting assemblies are connected with the big ends of the tool jackets, clamping piece restoration components are connected with the small ends of the tool jackets, and lifting operation pieces are arranged between the clamping piece lifting assemblies and the tool anchor ring. The intelligent tension tool anchor has the advantages that the tool clamping pieces are easily pulled to the big ends of the tool anchor eyes, so that the prestressed reinforcing steel engagement holes are expanded, and penetration of prestressed reinforcing steel is easy; after use, the clamping piece restoration components can help the tool clamping pieces automatically get back into work anchor eyes, and the intelligent tension tool anchor is particularly suitable for penetration and clamping of multiple pieces of prestressed reinforcing steel on the multi-hole tool anchor.

The invention discloses a ring-removing mechanism for a single-head large-cylinder-diameter nodular cast iron piston ring, and belongs to the technical field of piston ring machining. A workbench is vertically provided with at least three supporting rods in a fixed manner, and the supporting rods support one horizontal cover plate. The center of the cover plate is connected with a telescoping rod which passes through a vertical impact cylinder in a central hole of the cover plate. An inner side of a space formed by the enclosing of the supporting rods is provided with a rear baffle plate in a vertical manner. The workbench is also fixedly provided with a horizontal clamping cylinder, and the tail end of the telescoping rod is fixedly connected with a front baffle plate. When the horizontal clamping cylinder shrinks, the front baffle plate and the rear baffle plate surround a piston ring blank disposed between the front and rear baffle plates. The mechanism provided by the invention can enable the ring removal of the single-head large-cylinder-diameter nodular cast iron piston ring to be completed conveniently and reliably, reduces the rejection rate, and reduces the labor intensity of workers.

The embodiment of the invention discloses an intelligent voice device and a control method thereof. The intelligent voice device comprises a fixed voice head and at least one movable voice head whichcan be combined with or disengaged from the intelligent voice device on the physical structure. The method includes the steps of generating a first instruction signal which makes the signal-noise ratio of voice signals picked by the movable voice heads larger than or equal to a first threshold when the movable voice heads are in an instruction input state, judging whether the signal-noise ratio ofthe voice signals picked by the movable voice heads is larger than or equal to the first threshold or not according to the first instruction signal, if yes, executing the last step, if not, executingthe next step, conducting denoising treatment on the voice signals picked by the movable voice heads so that the signal-noise ratio can be larger than or equal to the first threshold, and conductingvoice recognition on the voice signals with the signal-noise ratio larger than or equal to the first threshold. By means of the intelligent voice device, near-distance voice picking can be conducted through the movable voice heads, the voice recognition accuracy can be effectively ensured, and the intelligent voice device is simple in operation and convenient to use.

The present invention provides a structure for omitting washers to reduce the number of parts, and keeping the fitting of two members fastened together even when the washers are omitted. The structure includes: a first member having a first screw hole; a second member facing the first member, having a second screw hole larger than the first screw hole, and threaded in a direction opposite to the first screw hole; and a fastener. The fastener includes, along a longitudinal direction: a first screw section having a diameter corresponding to the first screw hole; a second screw section between the first member and the second member, having a diameter corresponding to the second screw hole, and threaded in a direction opposite to the first screw section; a neck at least partially located in the second screw hole; and a head larger in the longitudinal direction than the second screw hole.

The invention relates to the technical field of oil extraction, in particular to multi-head large-displacement equal-wall-thickness screw pump stator production forming equipment and a forming processthereof, and aims to shorten the stator machining process and improve the stator machining precision. The equipment mainly comprises a main feeding mechanism, a forming mechanism, and an auxiliary feeding mechanism positioned between the main feeding mechanism and the forming mechanism; the main feeding mechanism comprises a hydraulic clamping and feeding fixture, and a driving part for driving the hydraulic clamping and feeding fixture to move; the forming mechanism comprises a hydraulic forming machine; the hydraulic forming machine, the hydraulic clamping and feeding fixture and the driving part are controlled through a digital combined adjusting device; and the digital combined adjusting device is a PLC control system. A pipe forming mold and related parts are mounted on the hydraulicforming machine to form a special hydraulic forming machine tool and a hydraulic clamping and feeding mechanism; and the digital combined adjusting device is used for controlling the whole machiningflow, so that the size precision and the straightness of machined stator pipes are improved, and qualified stator pipes are machined.

The invention discloses a double-head large-torque screwdriver. The double-head large-torque screwdriver comprises a screwdriver handle (1) and a screwdriver rod (2), a first concaved channel (101) is formed in the axial direction of the screwdriver handle (1), and the screwdriver rod (2) is contained inside the first concaved channel; the screwdriver rod (2) slides inside the screwdriver handle to be adjusted to a working position screwdriver head end or keeps a relative fixed position with the screwdriver handle under limiting of a limiting component to limit a working position screwdriver head station; second concaved channels (105) which are perpendicular to the axial direction of the screwdriver handle are further formed in the two ends of the screwdriver handle (1), and a torque rod (3) can be arranged inside each second concaved channel. The problem that an existing screwdriver is inconvenient to replace is solved; meanwhile, large-torque operation is achieved.

The invention relates to a cold heading forming technology for a balancing weight and a die structure for pre-heading a large step. The technology comprises the technical steps of S1, cutting a wire rod; S2, forming a small rod diameter; S3, expanding a large rod diameter; S4, pre-heating the large step; S5, forming the large step. The die structure comprises a main die unit and a stamp die unit, wherein the main die unit comprises a main die shell; a main die inner die is arranged in the main die shell; a main die base plate is arranged at the bottom of the main die shell; a main die thimble is arranged in the middle of the main die inner die; the stamp die unit comprises a stamp die shell; a forming die is arranged in the stamp die shell; a stamp die base plate is arranged at the bottom of the stamp die shell; a main die cushion block is arranged between the main die inner die and the main die base plate; a forming insert is arranged on the main die inner die; a forming die limiting plate is arranged between the forming die and the stamp die base plate; a stamp die mandril is arranged between the forming die limiting plate and the stamp die base plate. By cold heading, the manufacturing of balancing weights of all sizes, large and small rod diameters and chamfers is realized, and the inner flow line of a product is complete; furthermore, the balancing weight is high in intensity, and the service life of a die is prolonged.

The invention relates to a split bolt assembly comprising a split bolt bar, fastening nuts and a sleeve. The split bolt bar is sleeved with the sleeve, the fastening nuts are arranged at the two endsof the split bolt bar; conical plastic hole-forming cushions are arranged at the two ends of the sleeve; cushion plates are arranged between the conical plastic hole-forming cushions and the fasteningnuts; a thread rope is wound around the middle of the split bolt bar; multiple grooves are formed in the large end faces of the conical plastic hole-forming cushions; and the outer surfaces of the conical plastic hole-forming cushions are covered with woven fabrics. The split bolt assembly is simple in structure, reasonable in design and convenient to use, the split bolt bar is not liable to stick to concrete and thus can be reused for multiple times, and the construction cost is reduced.

A 45-degree cutting frame of Roman head large lace is specifically composed of a frame body, a left angle supporting rod and a right angle supporting rod. The left angle supporting rod is arranged on the left frame face of the frame body. The right angle supporting rod corresponding to the left angle supporting rod is arranged on the right frame face of the frame body to form the whole 45-degree cutting frame of the Roman head large lace. When the 45-degree cutting frame is applied, after materials are fixed, the cutting process is finished at a time, and the work efficiency is greatly improved. By means of the 45-degree cutting frame, the angle of the left side and the angle of the right side of the large lace materials can be adjusted at will. By means of the 45-degree cutting frame, the cut scrap edge is very accurate in angle, and when the Roman large lace is spliced, the door frame fit goodness is very appropriate, and the quality of a door is greatly improved. By means of the 45-degree cutting frame, after panels are fixed, moving is not likely to happen, and safety accidents that the panels vibrate and the panels jump and hit people cannot be caused.

A device for attaching items to clothing or gear including a length of material with a first end, a second end narrower than the first end, an opening near the first end of the length of material, a hole within the length of material located at the second end of the material, and a protrusion perpendicular to the plane of the length of material located between the opening near the first end of the length of material and the first end. The protrusion comprises a shaft having a head larger than the shaft, but equal to or smaller than the hole at the second end of the length of material. By folding the length of material at a tapered folding point, the second end fits through the opening near the first end allowing the protrusion to engage the hole of the second end, thus securely fastening the two ends together.

The invention relates to a sandwich noodle machine, which comprises a machine frame, a noodle container, a stuffing container, a piston, a piston rod, a power device connection, etc. The bottom of the noodle container is equipped with a plate-shaped cutter head, and the filling container The bottom is provided with a plate-shaped stuffing knife head, there is a gap between the dough knife head and the filling knife head, and several round holes are respectively arranged on the dough knife head and the stuffing knife head, and the round holes on the filling knife head The diameter is smaller than the round hole on the face cutter head, and each round hole on the filling head is in one-to-one correspondence with the round holes on the face cutter head. It is also concentric with the filling knife head, and the round hole of the filling knife head is larger than that of the filling knife head, and then the final sandwich noodles are completed by applying pressure on the dough and filling. The idea is ingenious, the structure is simple, and the cost is low. , high efficiency, easy to use, easy to popularize and apply.