174 results about "Single section" patented technology

The invention relates to the technical field of aluminum alloy profile processing, and particularly discloses a super-long thin-wall aluminum alloy profile anti-deformation vertical quenching method which comprises the following steps: S1, determining mechanical parameters, and obtaining the maximum equivalent buckling axial pressure P of a to-be-quenched aluminum alloy profile; s2, determining the maximum constraint length of a single section: further calculating the maximum allowable length of the single constraint section of the to-be-quenched aluminum alloy section; S3, determining a minimum constraint section; S4, carrying out solid solution quenching: equally dividing the to-be-quenched aluminum alloy section according to the minimum constraint section N, and carrying out section marking in the radial direction from the bottom to the top, the adjacent segment marking positions and the top of the sectional material are restrained and fixed; and after fixation, solid solution quenching is carried out, and after solid solution quenching is completed, the profile is taken out. The vertical quenching device is suitable for vertical quenching requirements of various ultra-long thin-wall aluminum alloy profiles with complex sections, and the profiles are effectively prevented from being deformed in the vertical quenching process.

The invention relates to a sectional type positioning installation method and system for a steel structure frame, and relates to the technical field of building structure construction. The method comprises the steps that three-dimensional coordinate measurement is conducted on the embedded bolt through a total station, a deviation value recording table is obtained, and a control network and a marking system are established; the method comprises the following steps: performing ultrasonic flaw detection and pre-tension reinspection on a steel structural member, performing ground pre-assembly to obtain a single-section steel frame model, and performing optimization treatment to form a number marking system and an assembly sequence diagram; a steel structure is divided into a plurality of independent installation units, and preliminary positioning is achieved through a temporary fixing technology; secondary measurement is carried out, fine adjustment is carried out through an ejector and a wire drawing device, accumulated deviation is dispersed through an overall balance method, and the pre-camber is set to obtain a stable frame system; the high-strength bolts are finally tightened, and welding construction is conducted; the roof system is installed in a batched concentrated hoisting mode. The problem that accumulated errors are difficult to control in traditional steel structure installation is solved, and the installation precision and efficiency are improved.

The utility model discloses a square steel tube with an inbreak angle and an anti-slip concrete filled steel tubular column with the inbreak angle, which relate to the field of constructional engineering, and comprise the square steel tube with the inbreak angle, the square steel tube with the inbreak angle is built together through a plurality of single sections, and the upper end face and the lower end face of the built square steel tube are closed along with the shape. And the concrete is poured into the inner cavity of the square steel tube with the inner break angle and is bonded into a whole. The steel pipe concrete column is ingenious in conception and reasonable in layout, and the folded inner folding angle can play a better role in restraining concrete in the column, so that relative slippage between the steel pipe and the concrete at the inner folding angle is effectively reduced, and the overall stress performance of the steel pipe concrete column is improved.

The utility model discloses a subsection assembly type submersible permanent magnet synchronous motor which comprises motor sections and spline assemblies, the motor sections are connected through the spline assemblies, each motor section comprises a single-section shell and a motor shaft, the single-section shells are connected in a welding mode to form a motor shell, the two ends of each single-section shell are respectively provided with a supporting sleeve, and the motor shaft is connected with the supporting sleeves. The motor shaft penetrates into the single-section shell, the two ends of the motor shaft penetrate to the outer side of the supporting sleeve respectively, the two ends of the motor shaft are provided with shaft sleeves respectively, the shaft sleeves play a role in protecting the motor shaft, the spline assembly comprises a bearing seat, a spline sleeve and a self-aligning roller bearing, and the connecting ends of the motor shaft are inserted into the spline sleeve respectively. A cavity is reserved between the connecting ends of the motor shaft; the whole submersible permanent magnet synchronous motor adopts a segmented assembly structure, the length of a single motor shaft can be effectively reduced, submersible permanent magnet synchronous motors with different lengths can be assembled, the self-aligning performance is good, and the coaxiality error of the motor shafts can be compensated.

The invention relates to the technical field of underground engineering construction, in particular to a prefabricated station jacking method using novel longitudinal beam connection, which comprises the following steps of: prefabricating prefabricated longitudinal beam single-section components according to station structure blocks, and sequentially and integrally jacking the prefabricated longitudinal beam single-section components in a ring-dividing manner under the assistance of a temporary support system; pre-stressed anchor cables are arranged in reserved anchor cable tensioning holes in the hogging moment stress areas of the prefabricated longitudinal beam single-section components in a penetrating mode and tensioned to the designed pre-stress, and the hogging moment stress areas of the prefabricated longitudinal beam single-section components form a whole; the pre-embedded stress steel plates of the prefabricated longitudinal beam single-section components of the adjacent rings are connected in the joint areas, so that the sagging moment stress areas of the multiple prefabricated longitudinal beam single-section components form a whole; and a wet joint is poured in the joint area. The method has the advantages that the construction efficiency is improved; the structural safety is enhanced; the engineering cost is reasonably controlled; the method adapts to complex geological conditions; green construction is promoted; the construction efficiency is improved, the cost is reduced, and the structural safety is enhanced.

A manufacturing method of a K-shaped derrick main body relates to the technical field of petroleum drilling and production equipment, and comprises the following steps: step 1, drawing a derrick borehole center line, a thigh center line, a thigh outer contour line and a plurality of groups of rack end surface sample lines on a platform; 2, main legs of all sections of racks of the derrick are uniformly placed and fixed to a platform according to a sample line, rack cross braces and inclined braces are installed, and positioning assembly positioning welding is carried out; thirdly, the section connecting single-lug plates and the double-lug plates on all the section racks are positioned and welded to the main legs according to the center lines of the thighs and the drawing sizes; fourthly, the center line of a well hole of the derrick is reversely guided and copied to each segment of rack, and proofing and hole punching are conducted; step 5, welding the single piece of the piece rack in a conventional mode, and connecting the single lug plate and the double lug plate in sections; sixthly, a numerical control floor type boring and milling machine is used for being matched with a plate bending tool to machine the end face of the rack, the section connecting single-lug plate hole and the double-lug plate hole to the required size; by means of the method, it can be guaranteed that the attachment faces between the single sections of the derrick are aligned and attached tightly, and the method has the advantages of being good in bearing capacity and stability.

The invention provides a vertical shaft double-layer steel shaft wall lifting system which comprises a base plate, a lifting rod parallel to a double-layer shaft is rotatably inserted in the base plate, a first limiting plate parallel to the base plate is fixed to the bottom of the lifting rod, and a second lifting lug is arranged at the top of the lifting rod. And the first limiting plate is rotated to be staggered with the base plate in a manner of rotating the lifting rod, so that when the double-layer shaft is lifted, the top surface of the first limiting plate can be in contact with and lift the bottom wall of the upper flange plate. The auxiliary mechanism is used for assisting in pressing the top wall of the upper flange plate corresponding to the first limiting plate in position before lifting. Hoisting connection is achieved by using the original pouring hole in the upper flange plate as a stress point, mounting and dismounting operation of the hoisting structure on the pouring hole can be efficiently completed before and after hoisting, the single-section hoisting efficiency of the double-layer shaft is improved, reutilization can be achieved, cost is saved, and it is ensured that the inner wall structure of the double-layer shaft is not damaged.

The utility model relates to a steel structure building downpipe system which comprises multiple water-saving downpipes, nuts and pipe clamps, and single water-saving downpipes are connected through corrugated short sections. The nuts are fixed on a steel column or a pre-embedded steel plate of the steel structure building at intervals in the height direction; and the other end of the pipe clamp is connected with the nut. The pipe clamp comprises a double-semicircle holding clamp and a stud fixedly connected to one side of the double-semicircle holding clamp, and the stud is in threaded connection with the nut. The diversion rope is arranged in the middle of the downpipe in the height direction. The nut is used as a pipe clamp connection foundation, the distance between the structure and the downpipe is effectively utilized, meanwhile, the straightness of the downpipe can be secondarily adjusted, and the whole downpipe is straight. The water falling pipe is connected through the corrugated short section, and part of pipe sections can be replaced and arranged more conveniently. The flow guide rope in the downpipe is added, so that the flapping and impact of rainwater on the pipe wall and the weight of rainwater flowing down along the pipe wall are reduced, and the downpipe is firmer.

Provided is an article processing assistance device that prevents reductions in work efficiency under conditions that allow for storage of a plurality of types of articles in a single section. According to the embodiments, an article processing assistance device comprises an interface and a processor. The interface receives article information that includes article identification information and an article size for respective articles, section information that includes section identification information, a section size, and a section position for respective sections of equipment that stores articles, inventory information that includes article identification information for predetermined articles, section identification information for the sections at which the predetermined articles are stored, and storage positions within the sections at which the predetermined article are stored, and warehousing information that includes article identification information for articles to be warehoused. The processor estimates open areas within the sections on the basis of the section information and the inventory information, detects storage candidate areas at which the articles to be warehoused can be stored from the empty areas within the sections on the basis of the article information and the warehousing information, and outputs warehousing assistance information about the storage candidate areas.

The invention discloses automatic press-fitting equipment for a deep groove ball bearing retainer and an elastic deformation compensation method, relates to the technical field of bearing processing, and is characterized in that aiming at optimization and improvement of a bearing piece, single-section pressing pocket pieces are arrayed in the annular direction of a shaft washer and are in mirror symmetry in the thickness direction, upper and lower pressing parts are staggered and overlapped, and a rubber elastic gap is reserved; the connecting rod is connected with all the single-section pressing pocket pieces through one-way / two-way slotting, the outer ring arc pieces are matched with the inner pressing blocks and the fastening rivet sleeves to strengthen the structural stability, the compensation method comprises the workpiece improvement stage and the press fitting improvement stage, and in the workpiece stage, staggered assembly of the single-section pressing pocket pieces and the outer ring arc pieces is completed. In the press-fitting stage, the upper end and the lower end of a bearing assembly are synchronously pressed through a press-fitting tool bit, a pressing head is matched with an outer ring arc piece to achieve uniform stress, and through the design of a separated retainer and symmetrical synchronous press-fitting, local stress concentration is effectively avoided, elastic deformation and ball damage are reduced, the bearing assembly quality is improved, and the service life of the bearing is prolonged. The method is suitable for large-scale production of various deep groove ball bearings.

The surface spraying device comprises a base, a lifting device is arranged at the position, close to the front end, of the center of the upper end face of the base, multiple sets of first telescopic assemblies are symmetrically arranged at the output ends, on the two sides of the lifting device, of the base, and first telescopic rods are arranged at the output ends of the first telescopic assemblies; a first moving frame is arranged at one end of the first telescopic rod, a first sliding rail is arranged at one end of the first telescopic assembly on the upper end face of the base, and a first sliding groove is formed in the bottom end of the first moving frame. The clamping block is arranged at one end of the rotating shaft, so that the rotating driving piece drives the clamping block to rotate through the rotating shaft, the clamping block moves along the interior of the annular sliding groove through the annular sliding rail, and then the clamping block fixes the barrel from the two ends and drives the barrel to rotate; the problem that a spraying device cannot guarantee the spraying thickness is solved, and therefore the barrel spraying quality is improved.

The application relates to a construction method of an inner water pressure device of an ultra-large-caliber reinforced concrete pipe jacking pipe section, which comprises the following steps: S00, hoisting a bottom blocking plate; S10, installing a pipeline and a positioning sleeve ring; S20, installing a top blocking plate; S30, performing an inner water pressure test on a single pipe section; S40, installing a pipe section splicing support and hoisting a lower pipe section; S50, installing a pipe section interface splicing device and splicing an upper and lower pipe jacking pipe section; S60, assembling a hoisting type pipe jacking interface inner water pressure test device; S70, installing the hoisting type pipe jacking interface inner water pressure test device; S80, performing an inner water pressure test on a pipe section interface; and S90, installing a pipe jacking interface opening angle positioning device. The application has the advantages that a pipe jacking pipe section interface splicing device and a pipe jacking inner water pressure counter-pulling adjustment test frame are adopted, the structure design is ingenious, assembly is convenient, the positioning sleeve ring can be used for adjusting the perpendicularity of the pipe section, the sealing property of the structure can be maintained, the leakage phenomenon is reduced, the reliability of detection data is improved, and remarkable economic benefits are achieved.

The utility model provides a clothes drying device with detachable single-section rods, and relates to the field of clothes drying devices.The clothes drying device with the detachable single-section rods comprises two main clothes hangers, a plurality of supporting rods and two single-section rods, and the two ends of each single-section rod are fixedly connected with connecting rods. The limiting rod can slide upwards in the inner wall of the sliding groove to drive the spring to contract, then when the clothes hanger is hung on the inner wall of the groove and the limiting rod is loosened, the limiting rod can be driven to slide downwards to reset under the reset effect of the spring, and one side of the limiting rod abuts against one side of the inner wall of the limiting frame and the outer surface of a clothes hanger hook. The upper portion of the clothes hanger hung in the inner wall of the groove is limited and blocked, in this way, when clothes are aired, the clothes hanger is not prone to sliding and rotating on the single-section rod in windy weather, the situation that the hung clothes fall on the ground and are stained due to falling is avoided, the use effect of the clothes drying device is improved, and use is convenient.

The application discloses a kind of rigid-flexible composite connecting devices for multi-section pipeline robot, comprising: connecting component I and connecting component II;Connecting component I includes mounting seat I, cable assembly and butt joint ball rod;Connecting component II includes mounting seat II, ball head guide assembly and ball head limiting assembly;One end of cable assembly is connected with mounting seat I, the other end is connected with mounting seat II;Ball head guide assembly and ball head limiting assembly are arranged on mounting seat II;One end of butt joint ball rod is connected with mounting seat I, the other end is provided with ball head, ball head guide assembly is provided with the guide channel along the axial direction in, ball head can enter and exit ball head limiting assembly along guide channel;The present application can realize rigid-flexible switching connection, with autonomous docking function, pipeline adaptive ability is strong, the overbending problem of multi-section pipeline robot is converted into the overbending problem of single-section pipeline robot, can pass through small curvature radius narrow bend and T type pipeline, improve the overbending of multi-section robot.

The invention discloses a radial gate modular manufacturing method, which relates to the technical field of radial gate manufacturing, and comprises the following steps: performing primary correction on each workpiece according to a primary deviation detection result to obtain a primary corrected workpiece group; scanning the workpiece group after primary correction to obtain a three-dimensional model of the workpiece group, simulating and assembling the three-dimensional model of the single gate leaf group according to the three-dimensional model of the workpiece group to form a three-dimensional model of the single gate leaf group, and performing secondary deviation detection on the three-dimensional model of the single gate leaf group according to the design model of each single gate leaf, performing three times of deviation detection on the three-dimensional model of the single-leaf door leaf structure according to the design model of the single-leaf door leaf structure, assembling the corrected single-section door leaf into the single-leaf door leaf structure, and performing radian detection on the assembled single-leaf door leaf structure, and the standard single-section gate leaf group passing the radian detection is conveyed to a construction site for on-site assembly of the radial gate. The radial gate field welding construction procedure is simpler, the production efficiency is high, and the construction accuracy is high.

The invention discloses a ship mooring part split design method based on multi-process forming parameter optimization, and relates to the technical field of ship structural part precision forming and process optimization design. The method comprises the following steps: generating a plurality of candidate split structure schemes and corresponding multi-process forming paths; working procedure state vectors used for representing the equivalent stiffness, the plate thickness change and the residual stress after the single-section structure is formed are constructed; establishing a cross-process state association mechanism based on process state vector recursion; based on the cross-process state correlation mechanism, stability analysis is conducted on forming parameters within the process disturbance range, and a forming parameter robust value interval meeting the target assembly precision requirement is determined; and performing quantitative comparison and optimization on each candidate split structure scheme based on the value interval. The technical problems that in the prior art, split design of ship mooring pieces depends on experience, the multi-process forming coupling effect is difficult to quantitatively evaluate, the assembly precision is difficult to guarantee, and the process robustness is insufficient are solved.

The embodiment of the invention discloses a measurement method for improving the precision of laser measurement of the fitting linearity of a low-rigidity rotary body, and the method comprises the steps: placing a measured rotary body at a plurality of preset rotation angles, and moving the measured rotary body from one end of the measured rotary body to the other end of the measured rotary body through a laser distance measurement sensor for measurement, the coordinate of the fitting circle center O of the single section position of the measured rotary body is calculated; calculating the maximum enveloping circle of the fitting circle center of the single section of the measured revolving body; compensating and measuring the downward movement amount of the coordinate of the fitting circle center O of the single section due to self weight, and compensating the fitting circle center O to obtain the coordinate of the compensated fitting circle center O of the single section; coordinates of the compensation fitting circle centers O of the multiple sections are obtained, and the straightness error of the measured rotary body is calculated. The problems that pits, scratches and abnormal reflection on the continuous highest point position of the side face of the rotary body part affect measurement and recognition of the highest point, and bus dislocation affects measurement precision are solved.

The invention relates to an assembly type side box composite beam bridge location modular suspended splicing construction method. The method comprises a single-segment construction method, wherein the single-segment construction method comprises the steps of S100, construction preparation, S200, side main beam installation, S300, cross beam installation, S400, small longitudinal beam installation, S500, segment measurement and adjustment, S600, high-strength bolt construction, S700, side main beam top plate welding, S800, anticorrosive paint coating, S900, stay cable hanging and initial tensioning and S1000, bridge deck slab hoisting. The steel beam segments are divided into a plurality of modules which can be spliced and connected, such as the side main beams, the cross beams and the small longitudinal beams, and are temporarily fixed through hoisting alignment and temporary bolts, so that segment measurement and overall adjustment can be uniformly implemented after the side main beams, the cross beams and the small longitudinal beams are spliced, and the linear control precision and the overall splicing stability are remarkably improved.

The invention belongs to the technical field of crawler belt moving platforms, and particularly relates to a single-section crawler belt moving platform which comprises a vehicle body, a vehicle head, a crawler belt driving motor, a steerable crawler belt, a driving belt wheel transmission structure, a driving belt wheel, a driven belt wheel, a driving belt wheel shaft, a driven belt wheel shaft, a steering driving motor and a steering transmission structure. The steerable crawler belt is integrally arranged on the outer side of a whole formed by the vehicle body, the vehicle head, the steering transmission structure, the driving belt wheel and the driven belt wheel in a sleeving mode, and the driving belt wheel and the driven belt wheel are meshed with tooth-shaped faces on the inner sides of annular grooves of the steerable crawler belt respectively. A plurality of V-shaped steering notches are evenly formed in the peripheral edges of the two sides, in the length direction, of the steerable caterpillar band respectively. The vehicle head of the single-track moving platform can rotate relative to the vehicle body, steering of the single-track moving platform is achieved, operation is stable and reliable, the requirements for miniaturization and light weight of detection robots in narrow and complex space after disasters are better met, and the application occasion is wider.

The utility model discloses a novel groove drum rocker arm twisting bobbin top which comprises a left top and a right top. A bobbin is mounted between the left ejector head and the right ejector head; the other ends of the left ejection head and the right ejection head are respectively connected with one side of the groove drum rocker arm assembly; the groove drum rocker arm assembly comprises a rocker arm fixing shaft; and one side of the rocker arm fixing shaft is connected with a left ejector head and a right ejector head respectively. By the adoption of the top head structure, the length (6 inches) of a rocker arm fixing profile can be synchronously shortened by 1 / 3, six ingots can be placed on an original single machine section, and cost is reduced; by adopting the top head structure, the new top head shortens the gap between the bearing and the diameter of the rocker arm, and meanwhile, the yarn winding prevention gasket is added to prevent yarns from being wound in the rotating process; the new top head is matched with a twisted yarn bobbin (175mm in length and 38mm in diameter); and the left and right ends of the top head are made of the same material, so that one end is prevented from interfering with the groove drum.

The invention relates to a water distribution ring pipe transportation device and a water distribution ring pipe transportation method. The transportation device comprises a guide rail structure which comprises an annular rail, and the annular rail is connected with a foundation layer through an anchoring assembly; the movable carrier comprises a bearing frame and a steering wheel set, the bearing frame is used for bearing the water distribution ring pipe, and the steering wheel set is used for running on the annular track; the lifting mechanism is arranged on the movable carrier and comprises a plurality of lifting units distributed on the outer side of the annular rail, and the lifting units are used for lifting the water distribution annular pipe. The water distribution ring pipe is installed on the movable carrier, the movable carrier is moved and transported to a designated position along the guide rail structure, and the lifting mechanism lifts a single section of the water distribution ring pipe to a preset elevation so as to be convenient to assemble. Through cooperation of the movable carrier, the guide rail structure and the lifting mechanism, flexible transportation of the water distribution ring pipe in a limited space is achieved, and the transportation efficiency is improved. The transportation device is easy and convenient to operate, safe and reliable, and potential safety hazards caused by manual operation are reduced.

1. Name of the product in this design: Single-phase single-section guide rail meter (EM145-M). 2. Purpose of this design: This design is used for electricity metering. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

The invention discloses a push-back type multi-section ship, and belongs to the technical field of ships. The push-back type multi-section ship comprises a bow ship located at the front end, a multi-section ship located in the middle and a stern ship located at the stern. The head ship, the plurality of section ships and the tail ship are sequentially connected through an interlocking mechanism, and the head ship, the section ships and the tail ship are all provided with sub observation control rooms and storable auxiliary propellers; the tail ship is provided with a total power system and a main outlook control room of the ship, and the tail ship pushes the multi-section ship and the head ship to sail forwards. Each single-section ship is provided with four auxiliary propellers, so that the single-section ship can automatically enter and exit a port, berth, leave a wharf, be separated from and combined with the ship and the like under the condition that the single-section ship is separated from the ship, and the flexibility and the economical efficiency are better. The single-section ship bodies are connected through the main push rod oil cylinders and the steering push rod oil cylinders, the mutual angles of the single-section ship bodies are controlled, the course is changed by adjusting the mutual angles of the single-section ship bodies, the space range used for steering of the ship is smaller, and steering is faster and more convenient.

The application discloses a dry filter box side automatic compression sealing structure, which comprises a compression device, an eccentric compression assembly, a pushing structure, a bearing support and a power assembly. The compression device comprises a compression rod. The compression rod comprises a long section, a short section and an arc-shaped connecting surface. The compression rod is provided with a first compression point and a direct compression position. The eccentric compression assembly comprises an eccentric wheel. The compression rod is horizontally rotated around the compression rod rotating point to be opened and compressed. The compression rod is opened through a tensioning piece to avoid the dry filter box channel. A single section is arranged in the long section of the compression rod, and the single section is provided with an inclination angle. The cross section of the eccentric wheel is a circular or arc-shaped columnar body. The pushing structure is provided with an inclined plane pushing plate with an inclined plane. The inclined plane area is sufficient to cover the outer surface of the eccentric wheel and is provided with redundancy. The inclined plane pushing plate is divided into two sections of functions of an empty load and a substantial compression eccentric wheel. The side compression sealing is designed at the tail end of the pushing process of the power assembly. The front pushing power of the front locking is utilized to realize the overall and comprehensive compression sealing of the side.

The utility model discloses a spliced bridge pier. The spliced bridge pier comprises a cover beam, a pier column and a base which are sequentially arranged from top to bottom. The pier column is of a hollow column type structure and comprises a plurality of hollow sections, and the adjacent sections are connected through UHPC wet joints. According to the utility model, a multi-segment spliced structure is adopted, the adjacent segments are connected by adopting the UHPC wet joints, and the UHPC material has good compression resistance, tensile property, adhesive property and working performance, so that the size of the wet joints can be effectively reduced, the stress of the joints is improved, and the construction is convenient; compared with the conventional cast-in-place height, the height of a single section in the pier column is smaller, the weight of the section is lighter, the pier column is more beneficial to transportation and installation, the use amount of structural materials is reduced, the construction cost is lower, and the pier column is suitable for bridge high pier assembly construction and has wide popularization and application prospects.

The utility model discloses a temporary steel water fender structure which comprises a plurality of sections of temporary water fenders formed by combining the temporary water fenders. Each section of temporary water baffle comprises a water baffle panel, a supporting truss structure arranged on the back of the water baffle panel, a front supporting structure and a rear supporting structure, wherein the front supporting structure and the rear supporting structure are arranged at the two ends of the water baffle panel and the two ends of the supporting truss structure respectively. The beneficial effects of the utility model are that: 1, the utility model adopts a standardized structure, is manufactured in factories and assembled on site, and is simple in structure and convenient to install; 2, the mounted water retaining panel adopts a vertical cantilever supporting structure, so that the width application is flexible as long as a single section meets the water retaining requirement; a triangular truss structure is arranged on the back of the water retaining panel, buttresses are arranged on the rear portion of the water retaining panel for tight contact, front and rear supporting seats are arranged at the bottom of the water retaining panel, connection is reliable, water pressure can be well transmitted to the buttresses and the bottom plate, and the structure is stable; and 4, the support is connected with the connecting plate through a bolt, and is connected with the embedded part after being positioned, so that the water-retaining door plate is convenient to disassemble and reuse, and the water-retaining door plate is an integral body and can be reused.

The utility model discloses a permanent magnet synchronous motor capable of increasing the cooling area of magnetic steel, which comprises a rotating assembly, the rotating assembly comprises an iron core body and a magnetic steel groove, the magnetic steel groove penetrates through the interior of a single-section iron core along the axial direction, the length direction of the magnetic steel groove is the same as the axial direction of the single-section iron core, and the magnetizing surface of the single-section magnetic steel coincides with the radial side surface of the magnetic steel groove; the cooling oil way is formed in the magnetic steel groove, the cooling oil way comprises an axial oil way in the axial direction of the single-section iron core and a radial oil way in the radial direction of the single-section iron core, and the axial oil way and the radial oil way are communicated to form a small-path oil way surrounding the non-magnetizing face of the single-section magnetic steel. The guide plates with the through holes are arranged between the opposite end faces of the adjacent single-section iron cores, each single magnetic steel groove forms two axial oil ways, the through holes are communicated with the two axial oil ways to form a radial oil way, the radial oil ways make contact with the non-magnetizing face of the single-section magnetic steel, the contact area of cooling oil and the single-section magnetic steel is increased, the heat dissipation effect of the single-section magnetic steel is improved, and the service life of the single-section magnetic steel is prolonged. The operation torque of the permanent magnet synchronous motor is improved.

The utility model discloses a variable-diameter multi-interval penstock ring rib externally-hung positioning device, and belongs to the technical field of water conservancy and hydropower. Comprising a vertically-arranged frame body, and attaching assemblies matched with the pressure steel pipe are arranged at the upper end and the lower end of the inner side of the frame body; a ring rib tray with the adjustable position is detachably installed on the inner side of the frame body. According to the utility model, the integral assembly of the pressure steel pipe ring ribs with variable diameters, various wall thicknesses and different intervals is realized; a plurality of ring rib trays are arranged, and a plurality of ring ribs of a single section of pressure steel pipe can be assembled at a time, so that the working efficiency is improved; a replaceable arc-shaped base plate is additionally arranged on the working surface of the electromagnetic chuck, so that the electromagnetic adsorption force when the outer diameters of different pressure steel pipes are attached is ensured.

The utility model provides a tunnel low-disturbance tunneling upper step hole arrangement structure with a drilling and blasting method cooperating with gas rock breaking, which comprises a central compensation hole, a plurality of underholing fracturing holes, a plurality of auxiliary fracturing holes, a plurality of auxiliary blasting holes, a plurality of peripheral blasting holes and a plurality of bottom plate blasting holes, and can combine the drilling and blasting method and a high-pressure gas expansion method to break rock. Compared with a hole arrangement structure of an explosive blasting method independently used, the hole arrangement structure can partially replace explosives through the expansion pipe to conduct slotting rock breaking, the total explosive amount and the maximum explosive amount of a single section are reduced, the vibration peak value and the vibration duration are reduced, the noise is reduced, and low-disturbance tunnel tunneling is achieved; the technical problems that a non-explosive rock breaking method is low in excavation efficiency and high in cost are solved, the method has the advantages of being high in rock breaking efficiency, low in cost and the like, and safe, efficient and low-disturbance construction of the hard rock tunnel in the environment sensitive area is achieved.

The pump sleeve connecting structure of the submersible electric pump for the well comprises an upper-section pump sleeve, a lower-section pump sleeve, a bearing body part and a connecting piece, and is characterized in that the upper-section pump sleeve and the lower-section pump sleeve are respectively sleeved on the upper part and the lower part of the bearing body part, and the upper part and the lower part of the bearing body part are respectively provided with a screw hole; a through hole I is formed in the position, corresponding to the screw hole of the bearing body component, of the upper section pump sleeve, a through hole II is formed in the position, corresponding to the screw hole of the bearing body component, of the lower section pump sleeve, the connecting piece is two screws, and the two screws penetrate through the through hole I and the through hole II respectively to be in threaded connection with the screw hole in the bearing body component. The pump sleeve connecting structure of the submersible electric pump for the well has the advantages of being reasonable in design, simple in structure, even in compression force, small in pressure difference in a single-section pump cavity and easy to assemble, production efficiency is improved, manufacturing cost is reduced, and meanwhile a long electric pump can obtain more excellent performance.