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771 results about "Pilot hole" patented technology
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A pilot hole is a small hole drilled into a piece of construction material. Its purpose is a) to guide a larger drill to the appropriate location and ease the job of the larger drill, b) to allow for the insertion of another hole-making tool, such as a knockout punch, that will produce the final-sized hole, or c) to locate, guide, and provide clearance for a self-threading screw in wood or plastic to prevent damaging the material or breaking the screw.
Expanding drill device
The disclosure describes an expanding drill device for expanding a pilot bore by moving the expanding drill device along a specified drilling line comprising: a housing; a drill head that has a cutting wheel which is arranged on the drill side of the expanding drill device so as to be rotatably mounted and driven about a rotational axis and relative to the housing and on which at least one drill tool for loosening the ground or the rock is arranged; and a drill-side connection for producing a connection to a pipe section located in the pilot bore on the drill side, wherein the drill side centrally has at least one receiving chamber for the loosened ground or the loosened rock, said receiving chamber being connected to a material conveyor device of the expanding drill device.
Owner:HERRENKNECHT AG
Electrically-driven translation type heavy fireproof door
The invention relates to the technical field of fireproof equipment, in particular to an electrically-driven translation type heavy fireproof door which comprises a door body, a driving mechanism and a translation mechanism. The translation mechanism comprises a translation base and a nut sleeve, a mounting hole and a guide hole which penetrate through the two sides of the translation base are formed in the translation base, the nut sleeve and the lead screw form a thread transmission pair, the nut sleeve is rotatably mounted in the mounting hole, the guide rod is slidably connected in the guide hole, and a synchronous assembly is arranged in the translation base; when the door body moves to the tail end of the stroke, the circumferential constraint of the synchronous assembly on the nut sleeve is automatically relieved, so that the nut sleeve can freely rotate relative to the translation base. Therefore, the motor and the transmission system do not need to overcome the huge inertia of the door body to achieve forced stopping, the instantaneous load and locked-rotor risk of the motor are remarkably reduced, and meanwhile the impact stress borne by a mechanical transmission part at the terminal is greatly relieved.
Owner:WUXI HENGBANG FIRE EQUIP CO LTD
Vertical shaft duct piece splicing device and construction method thereof
The invention discloses a vertical shaft duct piece splicing device and a construction method thereof, and belongs to the technical field of vertical shaft engineering construction.The vertical shaft duct piece splicing device comprises a moving trolley, an overturning assembly, a clamping mechanism and a lifting mechanism, a support of the overturning assembly is vertically arranged on the moving trolley, and an overturning plate is rotationally connected to the support and provided with two guide columns; the overturning oil cylinder is used for driving the overturning plate to be switched between the horizontal state and the vertical state. A base of the clamping mechanism is provided with two guide holes for two guide columns to penetrate through, a clamping piece is rotationally arranged in a rotating groove of the base, an elastic piece is installed in the rotating groove and connected with the clamping piece, and when a duct piece is placed on a turnover plate in a horizontal state, the clamping piece can be pushed to be rotationally inserted into a hanging hole of the duct piece, and the elastic piece is stretched. The lifting mechanism is arranged on the overturning plate and can drive the base to drive the clamping piece to vertically move downwards. The vertical shaft duct piece splicing construction method adopts the vertical shaft duct piece splicing device. The device is high in stability, high in assembly precision and low in safety risk.
Owner:SHANGHAI MECHANIZED CONSTR GRP
Microtunneling apparatus
This invention relates to a reamer assembly (6) for enlarging a substantially horizontal pilot hole (14) in the ground to produce a bore hole (18), including a cutter (21) which is rotatable about an axis X-X. A gear box (20) is positioned on a first side of the cutter (21) for interacting with a drive shaft (33) which is rotated about the axis X-X by a drive apparatus (2) outside the pilot bore hole (14) and a body (15) positioned on a second side of the cutter (21) for transferring thrust from a thrust apparatus (4) outside of the enlarged bore hole (18) to the cutter (21).
Owner:OPTIONX HOLDINGS PTY LTD
Jig for machining hole in inclined plane of impeller
ActiveCN224195970UReduce the difficulty of operationReduce operating labor intensityPositioning apparatusMetal-working holdersImpellerPilot hole
The utility model discloses an impeller slope hole processing jig, which relates to the field of impeller processing, and comprises an impeller, a support seat, an impeller positioning shaft, a balance hole drill jig and an opening pressure plate, the impeller is sleeved at one end of the impeller positioning shaft through a hub, and the other end of the impeller positioning shaft is matched and positioned with the support seat; the balance hole drill jig is arranged on the hub in a sleeving mode and pressed through the open pressing plate, and then the open pressing plate and the supporting base are locked and fixed through the locking bolt. The lower surface of the balance hole drilling jig and a cover plate inclined face on the impeller rear cover plate are attached and positioned, a guide hole is formed in the balance hole drilling jig in the axial direction of the impeller in a penetrating mode, and a machining hole is drilled in the corresponding position of the cover plate inclined face through the guide hole. The mode that a balance hole in the inclined face of the impeller is drilled through manual visual positioning operation is omitted, and operation difficulty and labor intensity are reduced; the machining and positioning mode of the balance hole in the inclined face of the impeller is changed, and controllability and quality consistency of hole position precision of the balance hole are improved.
Owner:NANFANG PUMP IND CO LTD
Multi-functional integrated wood working three-in-one connector hole opener
The utility model belongs to the technical field of trepanning device, and disclose multifunctional integrated woodwork three-in-one connecting piece trepanning device, including the basic support of cross section is L type, the basic support is installed with hand twist and is pressed tightly spare, the basic support one side is connected with the positioning template through first screw, the positioning template is connected with eccentric wheel punch -out template through second screw, the eccentric wheel punch -out template is opened with two different hole diameter holes, the basic support is connected with hole distance template through third screw away from the one side of positioning template, the positioning template still can be connected with hinged hole opening positioner through fourth screw, can respectively constitute four kinds of specifications three-in-one eccentric wheel hole trepanning device, hinged hole trepanning device, three-in-one embedded part pilot hole positioner, inclined hole positioner, cabinet door adjusting clamp etc., realize a set of tools, multiple purposes, need not to replace the tool repeatedly, be favorable to the use of wood working operation.
Owner:HENAN SUWO IND CO LTD
Segmented adjusting device for guide hole circular mold structure
The utility model relates to the technical field of mechanical part machining, in particular to a guide hole ring die structure segmented adjusting device which comprises a supporting base, an adjusting assembly is installed on the upper surface of the inner side of the supporting base, limiting assemblies are installed on the two sides of the top of the adjusting assembly, and supporting blocks are installed on the two sides of the top of the supporting base. According to the improved segmented adjusting device, the two sides of a material can be limited through a limiting assembly, and the top of the material is pressed through a second telescopic rod and a pressing disc, so that the material is vertically limited, and the stability of the material is further improved; according to the material limiting device, the situation that the machining quality is reduced due to position deviation of materials is effectively avoided, position adjusting work can be carried out while limiting is carried out, limiting does not need to be canceled to adjust the positions of the materials, labor force is reduced, meanwhile, time cost is saved, and therefore the production efficiency is improved.
Owner:YANGZHOU SHOUJIA MASCH CO LTD
Bottle preform mold positioning device
The utility model relates to the technical field of bottle preform molds, in particular to a bottle preform mold positioning device which comprises a movable mold and a positioning assembly. The positioning assembly comprises a mounting shell, a fixed mold, a guide column, a reset spring and an adjusting component, during mold closing, the movable mold is driven by an injection molding machine to approach the fixed mold, then the movable mold drives the guide column to extend into the guide hole, and the end of the guide column is conical, so that the guide column can conveniently extend into the guide hole; even if a certain position deviation exists between the fixed mold and the movable mold initially, the conical structure at the end part of the guide column guides the fixed mold to move until the fixed mold is aligned with the fixed mold, and the mold core on the movable mold completely corresponds to the mold cavity on the fixed mold, so that accurate positioning and stable mold closing of the movable mold and the fixed mold are realized, the mold closing precision is improved, and the production efficiency is improved. And the risk of mold damage is also reduced.
Owner:FOSHAN LIHE PRECISION MASCH CO LTD
Multifunctional spring assembling device for plastic pump head
The utility model relates to the technical field of spring assembling devices, in particular to a multifunctional spring assembling device for a plastic pump head, which comprises a workbench, a support arranged at the top of the workbench, a limit guide mechanism arranged at the top of the support and capable of longitudinally reciprocating, and a feeder longitudinally arranged at the bottom of the limit guide mechanism. A guide hole is longitudinally formed in the feeder, and a feeding pipe capable of communicating with the interior of the guide hole is obliquely arranged on one side of the feeder; a second sleeve capable of longitudinally moving along the interior of the guide hole is arranged at the top of the feeder, a second elastic piece is arranged outside the second sleeve, and the second elastic piece can drive the second sleeve to reset; and a guide rod capable of longitudinally moving is arranged in the second sleeve. The spring can be accurately installed in the pump head, bending deformation caused by non-concentrated stress during installation of the spring is avoided, and therefore the assembly quality of the pump head is guaranteed.
Owner:GUANGDONG ZHONGKAI PLASTIC IND CO LTD
Small-bore high-pressure corrugated pipe safety valve
The utility model discloses a small caliber high pressure bellows safety valve relates to safety valve technical field, solves the failure problem such as small size valve stem bending easily, the valve piece includes the valve piece of the integral constitution and the recoil disc part, and the lower extreme of bellows is connected with the recoil disc part, the top side of valve piece forms the guide column upwards and extends, and the guide hole of guide bushing slides up and down with the guide column, and the top end of guide column extends to the top hole orifice position of guide hole, and the lower spring seat is equipped with below spring, and the bottom of valve rod is abutted with lower spring seat, and the bottom surface of lower spring seat has the first cone body of the downward convex inverted cone, and the top surface of guide column is equipped with the first taper groove of the first cone body adaptation, and the first cone body is formed positioning into the first taper groove. The overall structural strength and rigidity of valve rod system are strengthened, can bear the high load under the high pressure working condition of small caliber, and the length of guide cooperation is prolonged, and the perpendicularity and stability of valve piece in the movement in the opening and closing process are ensured.
Owner:YONGJIA COUNTY LITE VALVE CO LTD
Guide plate for use in woodworking cutting guide
Disclosed is a guide plate for use in a woodworking cutting guide, having a body. The body has a first surface and a second surface opposite to each other along the thickness direction of the body. Multiple through-holes extend through the body. Along the thickness direction, the body is sequentially formed with a guide hole, a mounting hole, and a recess. The guide hole communicates with the mounting hole and extends to the second surface. The mounting hole communicates with the recess, which extends to the first surface. A tapered surface forms the wall of the guide hole, thereby limiting and positioning a guide bushing along the radial direction of the guide hole.
Owner:SUPER POWER TOOLS
Marine forging die
The utility model relates to the technical field of forging dies, in particular to a forging die for a ship. The die comprises a base, a lower die is arranged at the middle end of the top of the base, an exhaust passage is used for exhausting air in a lower die cavity, and the defects that in the forging process, air in an inner cavity of the lower die cannot be exhausted, the inner cavity of the lower die cannot be completely filled with metal, forgings are lack of meat, incomplete in shape and the like, and the quality of the forgings is affected are overcome. When the upper die moves downwards, the piston rod and the piston are driven to move downwards in the guide hole, on one hand, horizontal movement of the upper die is limited, on the other hand, the piston moves downwards to extrude air to enable the air to fluctuate in the guide hole, and due to the fact that the exhaust passage is communicated with the guide hole, impurities in the exhaust passage are blown away, and the exhaust passage is kept unblocked. When the piston moves upwards in the guide hole, a local low-pressure area is formed below the piston, air around the exhaust passage is forced to flow into the guide hole after impurities are filtered out through the filter screen, and air in the inner cavity of the lower die is promoted to be exhausted.
Owner:宜兴市中辉模具制造有限公司
A pipeline worm mating type pipeline back dragging method
ActiveCN117052979BPipe laying and repairCable installations in underground tubesPilot holeEcological environment
The application discloses a pipeline worm cooperation type pipeline back dragging method, which comprises the following steps: a, construction of a guide hole, including a guide entry hole, a guide hole channel and a guide exit hole, and hole cleaning work; b, preparation of a back dragging pipeline on the ground, and preparation of a pipeline worm, connection of the pipeline worm and the back dragging pipeline through a buckle, connection of a reamer and a drill rod at the other end of the pipeline worm; the drill rod, the reamer, the pipeline worm and the back dragging pipeline enter the guide entry hole, and then the drill rod pulls the reamer, the pipeline worm and the back dragging pipeline to conduct pipeline back dragging in the guide hole channel. The pipeline worm cooperation type back dragging can reduce anticorrosive layer damage, ensure smooth pipeline entry into a hole, reduce construction risks such as drill tool fracture, and can play a lever role to avoid pipe clamping caused by a non-smooth hole curve, improve one-time back dragging success rate, indirectly protect an ecological environment, shorten a construction period and reduce engineering cost.
Owner:SINOPEC OILFIELD SERVICE CORPORATION +1
Super deep mechanical method shaft construction method and system based on multi-well cooperative construction
The application provides a super-deep mechanical shaft construction method based on multi-well cooperative construction, comprising the following steps: S1, constructing a first shaft pilot hole section and a second shaft pilot hole section at the positions of a first shaft and a second shaft respectively, and constructing an inclined shaft passage between the bottoms of the two shafts; then, performing reverse reaming, tunneling and supporting on the second shaft pilot hole section; S2, constructing a first shaft pilot hole section below the first shaft pilot hole section and a second shaft pilot hole section below the second shaft pilot hole section, and constructing an inclined shaft passage between the bottoms of the two shafts; then, performing reverse reaming, tunneling and supporting on the first shaft pilot hole section; S3, repeating steps S1 and S2 until the first shaft and the second shaft are tunneled to a target depth. The application combines the advantages of the shaft method and the reverse shaft method, overcomes the efficiency bottleneck of reverse gravity slag removal during shaft tunneling, realizes the parallel of tunneling, supporting and slag diversion, increases the shaft completion efficiency and reduces the construction cost.
Owner:CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP CO LTD +1
Small-aperture intermittent deep hole machining tool set
A small-aperture intermittent deep hole machining tool set comprises a first tool, a second tool, a third tool, a fourth tool and a fifth tool. Through reasonable arrangement of component structures, a front section hole is a guide hole, a multi-blade supporting structure plays a supporting and guiding role in the front section hole through a first multi-blade supporting shaft and a second multi-blade supporting shaft in the machining process, the overall machining rigidity and stability are enhanced, cutter breakage is avoided, the whole cutter composition cost is low, and the machining efficiency is improved. And the machining of small-aperture intermittent deep holes can be efficiently and reliably completed.
Owner:SHAANXI FAST AUTO DRIVE GRP CO LTD
A double gear hole grinding clamping tool
This utility model relates to a double-jointed gear internal grinding clamping fixture, including a connecting plate and a retainer. An end face support is installed at the end of the connecting plate. The connecting plate has a gear groove guiding structure and a gear groove clamping mechanism. A clamping steel ball assembly is installed on the retainer. An axial through-hole is located in the center of the connecting plate, and guide holes and clamping holes are evenly distributed radially. The gear groove guiding structure includes a positioning rod fixed in the guide hole, with its inner end being V-shaped and extending into the central through-hole of the connecting plate. The gear groove clamping mechanism includes a push rod slidably installed in the guide hole, with a steel ball sleeve installed at its inner end, and a first steel ball located at the inner end of the steel ball sleeve. One end of a spring coil is connected to the connecting plate, and the other end of the spring coil is connected to the outer end of the push rod. This utility model features a novel structure, automatic centering of the fixture, simple and convenient operation, saving auxiliary time and improving efficiency; it enhances the practicality and wide applicability of CNC internal grinding machines.
Owner:WU XI SHI MING XIN JI CHUANG YOU XIAN GONG SI
Ultralow-temperature three-section circulator and preparation method thereof
ActiveCN121216095AMagnetic/electric field screeningMaintainance and safety accessoriesPilot holeMachining process
The invention relates to the technical field of circulators, in particular to an ultralow-temperature three-section circulator and a preparation method thereof.The preparation method comprises the steps that a cavity is prepared, and whether a guide hole is qualified or not is determined based on the contour straightness of the hole wall of the guide hole; whether the rough drilling process is qualified or not is determined according to the stability characterization value of the chip removal amount; the cutting speed of a drill bit is adjusted according to the overheat cutting detection rate of chip removal, and the speed adjusting coefficient is optimized according to the cutting efficiency of chip removal, or the feeding amount in the fine drilling stage is adjusted to complete the machining process of a single deep hole; determining whether the single deep hole is qualified or not according to the aperture uniformity of the deep holes so as to optimize the preset straightness; and completing the preparation of the cavity under the condition of determining that a single deep hole is qualified, preparing and inspecting the rest of a plurality of assemblies of the three-section circulator, and assembling the qualified assemblies to complete the preparation of the ultralow-temperature three-section circulator. The machining precision of the deep hole in the deep hole machining process of the cavity of the three-section circulator is improved.
Owner:嘉兴翼波电子有限公司
Advanced small pilot tunnel construction method for high ground stress soft rock tunnel
The invention discloses an advanced small pilot tunnel construction method for a high ground stress soft rock tunnel, belongs to the technical field of tunnel engineering construction, and adopts an excavation mode of combining a micro-step with a small pilot tunnel method and a support measure of combining a composite lining structure with a retractable U-shaped steel frame for temporary support. When crossing through a high-ground-stress soft rock stratum, by constructing the advanced small pilot tunnel, the effects of geological pre-judgment, risk pre-prevention and control, stress release in advance, support pressure relief, disturbance reduction and surrounding rock loosening circle reduction can be achieved. The surrounding rock deformation after the main tunnel is excavated is effectively reduced, so that the high-crustal-stress soft rock tunnel is efficiently and safely constructed.
Owner:CHINA RAILWAY 12TH BUREAU GRP CO LTD +1
An automatic sandblasting fixture for precision hardware surfaces
This utility model discloses an automatic sandblasting fixture for precision hardware surfaces in the field of precision hardware processing technology. It includes a base with a through-hole in the center of its surface. A turntable is rotatably connected to the inner side of the mounting hole. Guide holes are provided on the surface of the turntable, and four sets of guide holes are arranged in a ring around the center of the turntable. Track plates are mounted at the four corners of the base surface, and sliders are slidably mounted on the surfaces of the track plates. Clamping blocks are fixedly mounted at the ends of the sliders. A connecting rod is slidably mounted inside the guide holes, and a limit block is fixedly mounted at the bottom end of the connecting rod. The top end of the connecting rod is fixedly connected to the bottom surface of the slider. Through the movable clamping blocks arranged in a ring around the outer side of the processing table, hardware parts can be clamped from four different directions, improving the clamping force of the fixture. Simultaneously, it can quickly fix hardware parts of different regular shapes, improving work efficiency.
Owner:SHENZHEN FENNIU PRECISION TECHNOLOGY CO LTD
Detachable base type multi-pile guiding and positioning pile stabilizing platform and pile sinking construction method thereof
The invention discloses a detachable base type multi-pile guiding and positioning pile stabilizing platform and a pile sinking construction method thereof. The platform comprises a seat bottom supporting frame, and the seat bottom supporting frame is located on a seabed. The positioning steel pile is driven into a seabed and is connected and leveled with the support frame through a suspension device; the primary sliding frame can longitudinally slide along the support frame to rectify deviation; the secondary sliding operation platform is matched with the sliding rail of the primary frame through a guide rotating mechanism at the bottom of the secondary sliding operation platform, transverse sliding and azimuth angle rotation can be achieved, transverse and angle deviation correction can be conducted, and a guide hole and a pushing piece used for fine adjustment of a pile body are arranged on the secondary sliding operation platform. The invention further discloses a three-stage deviation rectification pile sinking method based on the platform. By means of the structure and the method, the problem that offshore pile group sinking precision is insufficient under the complex sea condition is effectively solved, centimeter-level high-precision pile sinking is achieved, the platform has the advantages of being detachable, extensible and reusable, and construction efficiency, safety and economical efficiency are remarkably improved.
Owner:SHANGHAI BOQIANG HEAVY IND GRP CO LTD
Tool capable of disassembling parts on mounting plate
The utility model relates to the technical field of test tools, and particularly discloses a tool capable of disassembling parts on a mounting plate, the tool comprises a base, a fixing frame, an ejector pin and a pressing plate, the base is provided with a plurality of through holes, the positions of the through holes correspond to the positions of self-plugging rivets on the mounting plate, rivet bodies of the self-plugging rivets can freely penetrate through the through holes, and the ejector pin is arranged on the fixing frame. A plurality of through holes are formed in the base, a plurality of guide holes corresponding to the through holes in position are formed in the fixing frame, ejector pins are arranged in the guide holes and are integrally stepped cylinders, the large ends of the ejector pins are in sliding fit with the guide holes, and the diameter of the small ends of the ejector pins is smaller than that of a rivet core of the self-plugging rivet, an annular groove is formed in the base, and an annular boss corresponding to the annular groove is arranged on the fixing frame. The annular boss can extend into the annular groove, the pressing plate is installed on the fixing frame and abuts against the ejector pin, the installation plate is fixed and limited through the base and the fixing frame, the rivet core is ejected out through the ejector pin, then the self-plugging rivet on the installation plate is dismounted, the installation plate can be repeatedly used, and then the test cost is reduced.
Owner:GUIZHOU HANGRUI SCI & TECH
A rocker arm guide mechanism and a cold header
Owner:NINGBO TENGWEI INTELLIGENT MASCH CO LTD
Wall surface leveling device for building decoration
Owner:SHENZHEN YAOYI CONSTR SERVICE CO LTD
Copper bar primary processing surface black skin peeling device and method
The invention belongs to the technical field of metal bar peeling, and particularly relates to a copper bar primary machining surface black skin peeling device and method.The device comprises a peeling mechanism, a feeding mechanism is arranged on the right side of the peeling mechanism, copper bars are stacked on the feeding mechanism, a drawing mechanism is arranged on the left side of the peeling mechanism, and a positioning mechanism is arranged on the front side of the feeding mechanism; an adapting mechanism is arranged on the lower side of the positioning mechanism, and an abutting mechanism is arranged between the right end of the adapting mechanism and the right end of the positioning mechanism. Through linkage self-adaptive adjustment of the positioning mechanism, the adaptive mechanism and the debugging mechanism and the design of the gradually-changed guide hole of the guide mechanism, automatic positioning and accurate centering of the copper bar are achieved, manual handheld operation is not needed, the labor intensity is reduced, the machining efficiency is improved, the problem of coaxiality deviation caused by manual positioning is avoided, and the production efficiency is improved. The defects of uneven peeling, surface scratching and the like are effectively reduced, and the basic quality of copper bar peeling processing is remarkably improved.
Owner:JIANGXI ENHUI COPPER CO LTD
Injection molding machine
To provide an injection molding machine capable of molding both of a resin molded product having a through-hole formed thereto and a resin molded product having no through-hole formed thereto without damaging the appearance of the resin molded product.SOLUTION: In the injection molding machine 1 equipped with a fixed mold 2 and a movable mold 3 arranged so as to be opposed to each other, the fixed mold 2 for forming the design surface of the resin molded product has a molding surface following the design surface of the resin molded product and the shaft 9 for the prepared hole for forming the prepared hole 5 in the resin material M by being inserted toward the resin material M charged in a cavity C from the molding surface. The end face of the shaft 9 for the prepared hole is formed into a shape copying the design surface of the resin molded product and the movable mold 3 has a cylindrical part 19 protruding toward the fixed mold 2 so as to surround the leading end part of the shaft 9 for the prepared hole so as to leave a predetermined interval when the shaft 9 for the prepared hole is inserted in the resin material M.SELECTED DRAWING: Figure 1
Owner:TOYOTA JIDOSHA KK
High-precision limiting structure for vibrating rod of hydraulic rock drill
The high-precision hydraulic rock drill rapping rod limiting structure comprises a hydraulic cylinder body and a hydraulic cylinder rear end cover connected to the tail end of the hydraulic cylinder body, a rapping rod is arranged at the axis position in the hydraulic cylinder body, the tail end of the rapping rod is a conical surface, and the inner side of the hydraulic cylinder rear end cover is connected with a main limiting seat; a guide hole is formed in the axis position of the main limiting seat, an annular oil storage cavity is formed in the bottom in the main limiting seat, the aperture of the guide hole is matched with the outer diameter of the tail end of the rapping rod, a conical damping cavity matched with the tail of the rapping rod is formed in the bottom of the guide hole, and a miniature radial damping hole is formed in the top of a cone of the conical damping cavity. And the miniature radial damping holes are communicated with the annular oil storage cavity. According to the design, the conical buffer head is matched with the conical damping cavity, so that gradually-increased hydraulic damping force is formed, and stable speed reduction is achieved. The limiting shoulder is used for making contact with and compressing the disc spring set, nonlinear and high-rigidity buffering force is provided, stable output of impact energy is guaranteed, and noise and harmful vibration are remarkably reduced.
Owner:GUILIN FANGXING MASCH CO LTD
An inside flange forming device for a jacketed through hole
The present application provides a kind of inside flanging forming device of jacket through hole, belong to pressure vessel processing technical field.It solves the problem of existing technology when processing jacket through hole inside flanging, processing is troublesome, the problem of insufficient forming quality.The inside flanging forming device of jacket through hole, including cylinder body, forming die head and vertically arranged pull rod, forming die head is conical frustum and has the guide hole one along its axis through, the large end of forming die head is downward and fixedly connected in the upper end of cylinder body, the lower end of pull rod is slidably connected in cylinder body and pull rod can be relatively cylinder body axial telescopic under the action of hydraulic drive, pull rod is up and out of forming die head through the guide hole one, the upper end of pull rod can be detachably sleeved with the push seat that can be synchronous with pull rod and move down, the bottom of this push seat has the push part of circular tube shape and is concentrically arranged with forming die head.The present application makes jacket through hole can be smoothly and smoothly completed flanging forming, effectively guarantees the forming precision and forming quality of inside flanging.
Owner:ZHEJIANG CHENGXIN PHARMA & CHEM EQUIP
A new combined rock breaking device of hard rock microwave-drilling tool
This invention discloses a novel combined microwave-drilling device for hard rock, belonging to the field of rock breaking technology. It includes a ground control system and a microwave generator. One end of the ground control system is connected to the microwave generator; a power box is connected to the bottom of the microwave generator, and a rock-breaking motor is installed inside the power box. The drilling tool of this invention consists of a pre-drilling small drill bit and a reaming large drill bit. The pre-drilling small drill bit acts as a pilot tool, drilling a guide hole on the rock surface through high-speed rotation. Simultaneously, it utilizes the local high stress concentration effect of its cutting edge to pre-damage the rock mass surrounding the hole wall, forming a micro-crack network, significantly reducing the integrity and strength of the rock mass. The reaming large drill bit efficiently enlarges the drilling cross-section of the weakened rock mass. Through the synergistic effect of mechanical fracturing and microwave thermal assistance, the drilling cross-section is rapidly enlarged, while reducing energy loss and tool wear during pure mechanical drilling.
Owner:SICHUAN UNIV
Shaft excavation method that combines boundary pipe jacking pre-support with internal weak blasting
This invention belongs to the field of vertical shaft blasting excavation construction control technology, and particularly relates to a vertical shaft excavation method that coordinates boundary pipe curtain pre-support with internal weak blasting. The method first delineates the vertical shaft boundary and defines the excavation area. A guide hole is excavated at the center of the area and enlarged to construct a central initial shaft. A rotating magnetic field probe that can move up and down along the axis is installed inside the shaft. During the drilling of the guide hole, the deviation is controlled by an electromagnetic drilling-while-drilling measurement system. Then, grouting holes are excavated along the vertical shaft boundary, and unstable strata sections are simultaneously sampled, identified, and reinforced. At the same time, a retaining structure is constructed to form an edge support system. Subsequently, starting from the central initial shaft, multiple annular blasting areas are divided and marked from the inside out. Blasting holes are laid in each area, and blasting is carried out sequentially from the inside out, satisfying the free face compensation space criterion. Finally, locally unstable areas on the inner wall of the vertical shaft are reinforced in real time, and a permanent lining structure is constructed. This method achieves multi-process coordination, improving the safety and forming quality of vertical shaft excavation.
Owner:JIANGHAN UNIVERSITY