17results about How to "Accuracy controllable" patented technology

The utility model discloses a sample transfer device for an automatic headspace sampler, which comprises a base, a vertical plate vertically mounted in the middle area of the base, a sampling mechanism fixedly arranged on the vertical plate, and a sample feeding mechanism embedded in a groove of the base and positioned below the vertical plate, the control system is used for controlling the sampling mechanism and the sample feeding mechanism to move; a sample supply frame is movably arranged on a sample feeding mechanism, and headspace bottles are arranged on the sample supply frame in order; a movable sampling needle is arranged on the sampling mechanism; the position matching of the sampling mechanism and the sample feeding mechanism is adjusted through the control system, so that the sampling needle is inserted into the headspace bottle to realize headspace sample injection analysis. The sample transferring device of the headspace sample injector is compact in overall structural arrangement, space of an instrument is saved, meanwhile, sample transferring and accurate positioning of headspace sample injection are facilitated, temperature control and pressure adjustment of a headspace bottle are achieved, and consistency of the temperature of an airtight sample injection needle is guaranteed in the sampling and sample injection process in actual detection work.

The application discloses a kind of steel structure elevator shaft field construction device, belong to a kind of elevator construction device, including attachment frame body and lifting power device, lifting power device is installed on column body, lifting power device is connected with the lifting point power of attachment frame body by lifting rope, attachment frame body is closely contacted with the facade of column body by multiple friction wheels, pull hook power connection is also installed on attachment frame body by pull lifting power device, pull lifting power device is connected with lifting hook by pull lifting rope;Pull hook power device is used to pull the assembly unit of steel structure elevator shaft to construction position by pull lifting rope, by designing attachment frame body around the column of shaft, so that four columns have construction position on the same plane, in turn, simultaneous construction can be carried out, effectively improve the construction efficiency of elevator shaft, and the column body can be used as support and guide rail, the assembly unit of shaft is pulled to the corresponding area by pull lifting power device, in turn, construction site does not need to use additional crane.

The present invention relates to the technical field of pipe dismantling machines, and discloses a head mechanism of a non-destructive hydraulic pipe dismantling device, including a driving end, an external pressure pipe is arranged on the right side of the driving end, a plurality of hydraulic pipes are symmetrically arranged on the left side of the driving end, a hydraulic plug is arranged inside the left side of the hydraulic pipe, a push rod is interactively connected to the left end of the hydraulic plug, an intermediate wheel is arranged on the outside of the push rod, a clamping sleeve is arranged on the outside of the intermediate wheel, a pressure bead is arranged inside the left side of the clamping sleeve, and a positioning sleeve is arranged on the inner coaxial line of the clamping sleeve. The head mechanism of the non-destructive hydraulic pipe dismantling device moves to the left along the inclined groove on the upper surface of the inclined surface block through the pressure bead, so that the inclined surface block pushes the extrusion block inward to extrude the pipe fitting to shrink the mouth, so that a gap is generated at the threaded interface, and at the same time, the inclined groove causes the inclined surface block to drive the positioning sleeve to rotate to loosen the threaded interface, and micro-rotates while shrinking the mouth to loosen the screw mouth, so that the pipe fitting can be disassembled without loss.

The utility model relates to the technical field of column foot structures, and discloses a detachable column foot structure of an assembly type steel structure building, which comprises a column foot bottom plate, and the column foot bottom plate is used for being connected with a concrete foundation through a foundation anchor bolt; a pair of column foot flange plates is arranged at the top of the column foot bottom plate, a plurality of first bolt holes are formed in the column foot flange plates, and the column foot flange plates are fixedly connected with the flange plates of the H-shaped steel column through first bolts; a column foot web is arranged at the top of the column foot bottom plate, a plurality of second bolt holes are formed in the column foot web, and the column foot web is fixedly connected with the web of the H-shaped steel column through second bolts; the column foot flange plate and the column foot web plate are connected with the H-shaped steel column flange plate and the H-shaped steel column web plate through the bolts, disassembly is convenient, the H-shaped steel column and the column foot can be rapidly disassembled only by screwing off the bolts, recycling of the column foot structure is facilitated, the column foot cannot be damaged in the disassembly process, and cost is saved.

The utility model relates to an adjustable door frame forming die. The adjustable door frame forming die comprises a lower end die, a forming die, an adjusting bolt and a forming pressure head, a square containing groove is formed in the upper face of the lower end mold, a forming inclined face is arranged on the left side of the square containing groove, a through first threaded hole is formed in the bottom of the square containing groove, a second threaded hole is formed in the lower end of a forming pressing head, and a first connector is arranged on the lower face of the lower end mold. The forming pressing head is inserted into the square containing groove, and the adjusting bolt penetrates through the first threaded hole and the second threaded hole and is in threaded connection with the first threaded hole and the second threaded hole. A second connector is arranged on the upper face of the forming die, and an L-shaped groove matched with the forming pressing head is formed in the lower face of the forming die. The die has the advantages of being simple in structure, convenient to adjust, capable of achieving one-time forming, effectively reducing machining procedures, reducing production cost, high in efficiency, suitable for batch production, high in die forming precision and easy to control, reducing labor intensity of workers and manufacturing cost and improving working efficiency.

The anti-deformation machining tool for the thin-journal steam turbine rotor comprises a thin-journal connecting sleeve, the thin-journal connecting sleeve is composed of three sections of sleeves, the three sections of sleeves comprise two or three sleeves with different diameters, one to two steps are formed in the sleeves, welding grooves are formed in the three sections of sleeves when the three sections of sleeves are welded, and the welding grooves are connected and fixed through electric welding; the external diameters of the sleeves are the same, and the connection structure of the adjacent sleeves is that the connection parts of the adjacent large-diameter cylindrical sleeves and small-diameter cylindrical sleeves are matched steps, so that a structure with different diameters of sleeves is formed; matched steps are arranged at the joints of the adjacent large-diameter cylinder sleeves and the secondary-diameter cylinder sleeves, steps with square corners matched with square concave parts are arranged at the joints of the secondary-diameter cylinder sleeves and the small-diameter cylinder sleeves, and the joints of the steps are welded and ground to be flat.

This utility model relates to the field of oil and gas perforation equipment technology. Addressing the problem that existing ultra-high density perforating guns cannot perform selective blasting and perforation operations, and are only suitable for conventional oil pipe perforation operations, but cannot be applied to cluster perforation operations, this invention provides an ultra-high density long cluster perforating gun, comprising multiple perforating guns and a gun head assembly. Adjacent perforating guns are connected via a windowed connector assembly. The windowed connector assembly includes a windowed connector and a compressible connector pin assembly. The entire perforating gun is connected by contacting the conductive core rod on the perforating gun through the connector pin assembly. A detonation device including an electronic selective firing switch is installed at the window of the windowed connector, enabling selective blasting through the electronic selective firing switch and a wire connection. This ultra-high density long cluster perforating gun combines the characteristics of ultra-high density and selective perforation, achieving ultra-high density long-gun cluster perforation, and can be applied to cable cluster perforation operations.

The utility model discloses a kind of eight-blade square shoulder milling cutter of vertical installation, including blade main body, the blade main body is cubic structure, blade main body includes cutting edge, bottom locating surface, side locating surface and blade band, the cutting edge is evenly arranged along the bottom locating surface perimeter side, blade band is formed along the length direction of the cutting edge, adjacent cutting edge is connected by tool tip circular arc transition, the tool tip circular arc is arranged at the four corners of blade main body;The side locating surface both sides are provided with chip groove;Screw hole is arranged at the geometric center of the bottom locating surface;The blade main body is pressed up and down by punch along bottom locating surface direction, is pressed by multidirectional forming along the side locating surface direction.This utility model is simple in structure, and the cutting precision of blade is easy to control, guarantees the stability and quality of milling machining.

The invention discloses a rope type rotating weir and a control method thereof, and the rope type rotating weir comprises a weir plate which is rotatably arranged in a water passing channel and divides the water passing channel into an upstream and a downstream; a fixed pulley; a deflecting pulley; one end of the traction rope is connected with the weir plate, and the other end sequentially bypasses the fixed pulley and the steering pulley to be connected with the driving device; and the driving device is used for winding and unwinding the traction rope, so that the traction rope can drive the weir plate to rotate. In the process of increasing the opening degree of the weir plate, the gravity of the weir plate is beneficial to continuous increase of the opening degree. And in the process of reducing the opening of the weir plate, the opening can be continuously reduced under the action of water pressure. Therefore, based on the rope type rotating weir, the opening degree of the weir plate can be controlled by controlling the winding and unwinding amount of the traction rope, and the precision reliability and controllability are better. And no matter the opening degree is increased or decreased, the pressure or water pressure of the weir plate is beneficial to rotation of the weir plate, and the driving device is more labor-saving, so that the advantage of low energy consumption is achieved.

The present invention discloses an equivalent simulation method considering the stator stacking structure of a motor, including: establishing a three-dimensional finite element grid of a stator core and equivalent mass points of a stator winding and associating the three-dimensional finite element grid of a stator core and equivalent mass points of a stator winding to form a three-dimensional finite element model of a stator; determining material parameters and analyzing the influence of the values ​​of the material parameters on the stator modal frequency; selecting target material parameters and iteratively correcting the values ​​of the target material parameters until the deviation between the stator modal simulation result obtained by simulating the three-dimensional finite element model and the stator modal test result is within the target range, and then stopping the iteration; assigning the corrected target material parameters to the stator three-dimensional finite element model to perform stator modal simulation. The present invention also discloses an equivalent simulation system, a computer device and a computer-readable storage medium considering the stator stacking structure of a motor. By adopting the present invention, only one solid model needs to be constructed, which can reduce material parameters, is easy to control, and improves simulation accuracy.

The utility model discloses a vibrator suitable for the pharmaceutical industry, and relates to the technical field of vibrators, the vibrator comprises a base, a shell protection sleeve installed on one side of the base, a cylinder sleeve installed in the shell protection sleeve and a sliding core body arranged in the cylinder sleeve in a sliding mode, and an air inlet and outlet distributor is fixedly arranged between the shell protection sleeve and one end of the cylinder sleeve; a left side cavity is formed in a gap among the inlet and outlet air distributor, the air cylinder sleeve and the sliding core body; by changing an air path in the vibrator, the sliding core body can be driven to move back and forth in the air cylinder sleeve so as to generate vibration, the sliding core body does not need to be completely attached to the inner wall of the air cylinder sleeve during back-and-forth movement, only the outer circle total run-out and dimensional tolerance need to be guaranteed, the requirement for the high-precision size is single, and therefore the precision of the sliding core body is easier to control; and assembly is convenient, machining on high-precision machining equipment such as a grinding machine is easy to achieve, the machining cost is saved, and the machining efficiency is improved.

The utility model relates to an adjustable non-indentation lower die for a turning plate. The adjustable non-indentation lower die comprises a base and a forming die, the forming die comprises a connecting rod and a pressing head, a connecting head is arranged at the upper end of the connecting rod, and the pressing head is connected to the lower end of the connecting rod; the base comprises a body, a connecting part, a ball type rotating shaft and a tension spring; a placing groove is formed in the upper surface of the body, the two connecting parts are connected in the placing groove, and the two connecting parts are symmetrically arranged; an arc-shaped groove is formed in the upper end of the connecting part, the ball type rotating shaft is rotatably placed in the arc-shaped groove, a forming platform is arranged on the ball type rotating shaft, a containing cavity is formed in the portion, below the arc-shaped groove, of the connecting part, the tension spring is located in the containing cavity, and the ball type rotating shaft is arranged on the ball type rotating shaft. One end of the tension spring is connected to the bottom of the containing cavity, and the other end of the tension spring is connected to the ball type rotating shaft. The utility model has the advantages of simple structure, one-step molding, effective reduction of processing procedures and reduction of production cost.

A cold plate relates to the technical field of power battery heat dissipation, and is used for increasing the contact area of cooling liquid and ensuring the uniformity of cooling liquid flow. The cold plate comprises an upper plate body, a lower plate body and a flow channel arranged between the upper plate body and the lower plate body, the upper plate body and the lower plate body are sealingly connected, the flow channel is arranged on the plate surface of the lower plate body facing the upper plate body, and the two ends of the flow channel pass through one side of the lower plate body to form a liquid inlet and a liquid outlet; further comprising a strip-shaped groove arranged on the plate surface of the upper plate body facing the lower plate body, the strip-shaped groove is arranged in multiple, the multiple strip-shaped grooves are distributed at intervals, the strip-shaped groove is communicated with the flow channel, and the strip-shaped groove is used for increasing the contact area between the upper plate body and the cooling liquid flowing in the flow channel. According to the scheme, the cooling liquid can flow into the strip-shaped groove through the flow channel, the contact area between the upper plate body and the cooling liquid is increased, and the heat dissipation effect is improved.

The invention relates to a two-phase heat dissipation cold plate and system for heat dissipation of a high-power chip, and belongs to the technical field of heat dissipation of electronic equipment.The two-phase heat dissipation cold plate comprises a bottom plate, a cover plate, a liquid inlet and a liquid outlet, the bottom plate and the cover plate are connected in a sealed mode to form an inner cavity, and a plurality of rows of heat dissipation ribs are arranged in the inner cavity; the plurality of rows of radiating ribs are arranged at intervals in a multi-row manner in the working medium flowing direction from the liquid inlet to the liquid outlet, and a main runner is formed between every two adjacent radiating ribs; the height of at least part of the sections of each row of radiating ribs is gradually reduced in the working medium flowing direction, so that a connecting flow channel which is used for connecting two adjacent rows of main flow channels and is gradually increased in cross section area is formed; fluid mixing flow channels are reserved in the heat dissipation ribs at equal intervals, and the fluid mixing flow channels and the connecting flow channels can be used for disturbing flowing of fluid in the adjacent main flow channels. While excellent fluid expansion adaptability and enhanced heat exchange capacity are guaranteed, regularization and flattening of the cold plate structure are achieved, and the cold plate has the advantage of being low in manufacturing cost.

This application provides an installation method for a combined flexible cable structure and rigid membrane frame roof structure in the field of large-span spatial structure construction. The method includes dividing the roof into multiple fan-shaped construction zones; assembling rigid membrane frame units; pre-tensioning the flexible cable net structure; lifting and welding the rigid membrane frame units; lifting and connecting the pre-tensioned flexible cable net structure to the corresponding rigid membrane frame units; tensioning the flexible cable net structure; and fixing the flexible cable net structure. This application divides the roof into multiple construction zones and performs the assembly of rigid membrane frame units and pre-tensioning of the flexible cable net structure on the ground, which offers favorable conditions, easy precision control, and reduces uncertainties on-site. Subsequently, the rigid membrane frame units and the pre-tensioned flexible cable net structure are installed sequentially, followed by a coordinated graded tensioning process. This proactively incorporates the deformation of the rigid membrane frame units into the control system, coordinating it with the forming process of the flexible cable net structure, thus avoiding the problems of excessive passive deformation or repeated adjustments of the frame in traditional methods.

This invention discloses a short-pitch, multi-layer, integrally molded flexible winding and a high torque density permanent magnet motor, comprising 2 n One conductive layer, 2 n - One substrate layer, two coating layers, interlayer conductive connection hole one, and interlayer conductive connection hole two; 2 n Each conductive layer includes interleaved layers. n An odd number of conductive layers and n An even number of conductive layers; each conductive layer is uniformly distributed circumferentially. k × m Each single coil group is arranged in a continuous loop from the outside to the inside in the odd-numbered conductive layers; each single coil group in the even-numbered conductive layers is arranged in a continuous loop from the inside to the outside. When n > 1, the outer tail end of the even-numbered layer coil is electrically connected to the outer head end of the corresponding odd-numbered layer coil in the next adjacent odd-numbered conductive layer through an interlayer conductive connection hole. Based on the requirements of the splicing interface for the solder joints, this invention selects either a star connection or a delta connection. This invention can improve the motor torque density while eliminating motor cogging, effectively suppressing the nonlinear characteristics of the motor, and improving accuracy under all operating conditions, thus achieving a high-efficiency, lightweight, and miniaturized design for permanent magnet motors.