13 results about "Axial distribution" patented technology

The utility model discloses a cylindrical bone drill relates to the field of medical devices, and the cylindrical bone drill includes: drill body and the coaxial setting connecting handle with it, wherein, the drill body is the cylindrical structure of diameter 2.2 5.8mm, in the drill body including the spiral cutting head of integral processing formation, the spiral cutting head is by 4 10 spiral distribution cutting blade of the axial distribution of drill body constructs, and the front blade of every cutting blade is 58 62 with drill body axis angle of clamping, and the depth value of cutting blade is 0.5 1.45mm, and the outer periphery of drill body is equipped with the marking unit that the annular concave point circle group of the axial interval of 1 3mm is composed, the cylindrical bone drill of the utility model has cutting stable, bone mud delicate, mark clear and the like advantage, is applicable to the precision oral surgery such as planting, periodontal in autogenous bone collection and bone mud preparation, improves the operation efficiency and accuracy.

The application provides a well completion string, a well completion method and an injection-production system, the well completion string comprising a production casing and a well completion assembly connected to one end of the production casing, the production casing comprising one or more limiting splices, the multiple limiting splices being distributed along the axial direction of the production casing, a limiting part being arranged on the inner wall of the limiting splices, the limiting part being convex relative to the inner wall of the main body of the production casing; the limiting part is used for cooperating with a blowout plug to carry out blowout control, and / or is used for cooperating with a sealing plug at the bottom of a central pipe string lowered into the production casing to carry out string limiting. According to the technical scheme of the application, the limiting splices are designed in the production casing of the well completion string, the limiting part of the limiting splices can cooperate with the blowout plug to carry out blowout control or cooperate with the central pipe string lowered into the production casing to realize the setting of the string, stable blowout control can be realized under the condition that the well bottom is under pressure, and the setting of the central pipe string without packers can be realized, which provides favorable conditions for corresponding injection-production operations.

The application relates to a thread tool grinding method, device and numerical control equipment. The method comprises the following steps: determining the intersection between the chip flute edge line on the outer cylindrical surface of a blank and a thread guide line; determining the circumferential machining range of a machining track section from the intersection based on a machining range parameter; determining the axial distribution of the thread guide line along the tool axis within the circumferential machining range as the axial distribution of the machining track section along the tool axis from the intersection; decreasing the bottom surface circle radius of the blank along the circumferential deflection angle relative to the intersection based on a radial clearance angle parameter to obtain the radial distribution of the machining track section along the tool radial direction from the intersection; and determining the grinding track of a grinding wheel on the blank when grinding thread teeth based on the geometric parameters of the grinding wheel and the radial distribution and axial distribution of the machining track section. The method can ensure the grinding efficiency of the thread tool.

The application provides a compressor blade root mounting structure, a compressor and a blade root mounting method. The mounting structure comprises a wheel disc, a first groove body is arranged on the wheel disc and is distributed along the axial direction of the wheel disc, a second groove body is distributed along the circumferential direction of the wheel disc, a locking structure comprises a first locking block and a second locking block, the first locking block is provided with a first notch along the circumferential direction of the wheel disc, the second locking block is provided with a protrusion on the side close to the first locking block, in the first state, the protrusion fills the first notch, the other side of the second locking block is flush with the side wall of the first groove body, in the second state, the first end surface of the protrusion is in contact with the second end surface of the first locking block, the sum of the sizes of the first locking block and the second locking block in the circumferential direction of the wheel disc is greater than the size of the second groove body, the other side of the second locking block is in contact with the first blade, and the axial movement of the first blade is limited. The mounting structure provided by the application realizes the locking of the blade after the blade is mounted by means of the displacement of the second locking block, and the integrity of the flow channel is ensured.

This utility model discloses an anti-detachment retaining ring for drill bit nozzles and a drill bit assembly, relating to the field of drilling bits. It includes an annular elastomer having a first end face and a second end face distributed axially, with an inner groove formed on the second end face; and a protruding retaining member installed in the inner groove, with the projection of the protruding retaining member at least partially located outside the projection of the annular elastomer on a plane perpendicular to the axial direction of the annular elastomer. This effectively reduces the possibility of the nozzle detaching from the water outlet, solving the problem that conventional retaining rings are easily eroded by high-speed fluid and detach from the water outlet, leading to nozzle detachment.

The utility model provides a kind of stable ground gripping type concrete pipe pile, the stable ground gripping type concrete pipe pile includes pipe pile body, by C50 and above strength grade concrete pouring, outer diameter is 0.8-1.5 meters, wall thickness is 100-250 millimeters;Ground gripping part, set in the bottom end of pipe pile body, the ground gripping part is conical tip, tip surface is equipped with helical groove, groove depth is 10-30 millimeters, pitch is 50-150 millimeters;Longitudinal main reinforcement, along the circumferential uniform distribution of pipe pile body inner wall, the longitudinal main reinforcement is HRB400 grade reinforcing bar, diameter 20-32 millimeters, interval is 80-150 millimeters;Outer wall ground gripping texture, along pipe pile body outer surface axial distribution, the texture is trapezoidal projection, height is 5-15 millimeters, width is 20-50 millimeters, adjacent projection interval is 30-80 millimeters. By optimizing bottom ground gripping structure, outer wall texture design and internal strengthening scheme, the penetration efficiency of pipe pile, displacement resistance and connection reliability are significantly improved.

The application discloses a piston type regulating valve with double-layer sleeve type throttling components, which comprises a valve body, a valve seat, a piston, a driving mechanism and a throttling component, wherein the throttling component comprises an outer sleeve and an inner sleeve which are coaxially sleeved; a plurality of first throttling grooves are distributed on the sleeve wall of the outer sleeve in the axial direction; a plurality of annular protrusions and a plurality of annular grooves are alternately distributed on the outer circumferential surface of the inner sleeve in the axial direction; the outer circular surface of the annular protrusion is tightly combined with the inner wall surface of the outer sleeve; and a second throttling groove is arranged on the groove bottom of each annular groove. Each first throttling groove is communicated with the corresponding annular groove, thereby forming a fluid channel which enters the inner sleeve from the outside of the outer sleeve through the first throttling groove, the annular groove and the second throttling groove, and the adjacent annular grooves are isolated by the annular protrusion. The application realizes two-stage pressure reduction and energy dissipation through the double-layer sleeve, effectively inhibits the cavitation phenomenon, and improves the stability, reliability and regulating characteristics of the piston type regulating valve under the high pressure difference working condition.

This invention discloses a pressure measurement device and method, and a downhole pressure monitoring system. The device includes: at least one elastic pipe section with a pressure-bearing cavity inside, filled with a pressure-bearing fluid; and a sensing optical cable, including at least one strain-sensing optical fiber, distributed along the axial direction of the elastic pipe section and in contact with it. When the elastic pipe section is placed in the area to be measured, it deforms under the influence of a pressure difference between its internal and external parts, transmitting the deformation to the sensing optical cable. This invention measures the pressure difference between the internal and external parts of the elastic pipe section by measuring its deformation through the sensing optical cable, thereby determining the pressure in the area to be measured. By filling the pressure-bearing cavity of the elastic pipe section with pressure-bearing fluid, the invention allows the elastic pipe section to withstand greater external pressure, thus improving the pressure measurement range. Furthermore, by controlling the degree of deformation of the elastic pipe section under the influence of the pressure difference, the measurement accuracy can be controlled, improving the measurement precision.

A kind of suspension hub cover, including base, with base rotationally connected face cover and counterweight block being arranged on face cover, the middle of the base is equipped with mounting hole, the inner wall of the mounting hole is equipped with stop table, the back of the face cover middle is equipped with several first clamping legs that form cylindrical space, the cylindrical space is equipped with inner bushing, the inner bushing is attached with the inner side of first clamping leg, the inner bushing includes cylindrical body and several convex strips being arranged on the surface of cylindrical body and being axially distributed, the end of the cylindrical space is equipped with inclined surface towards the convex strip;The bearing between the inner wall of the mounting hole and the outer wall of first clamping leg, the outer ring of the bearing is in contact with stop table, the inner ring of the bearing is in contact with the clamping table of first clamping leg, the back of the base is equipped with rear cover that compresses bearing at mounting hole, the back of the base is equipped with second clamping leg.The installation of the utility model face cover has high reliability, and service life is longer.

The utility model relates to a kind of wear-resistant high hydrophobic coating material dispersion device, including dispersion bucket and the stirring device being set in dispersion bucket, the stirring device includes shaft and at least three stirring units, each stirring unit is spaced along the shaft axial distribution, the stirring unit includes hub and at least two paddles being arranged in the hub periphery, the included angle of the paddle with the axis of hub is 30 °~60 ° in;Two stirring units being arranged adjacently up and down, the paddle of one stirring unit is inclined along clockwise direction, the paddle of another stirring unit is inclined along counterclockwise direction.It solves the problem that coating material is not uniformly dispersed due to the single design of stirring unit in traditional dispersion device, and brings the effect of fully exchanging and mixing coating material in dispersion bucket, improving dispersion effect.

This invention discloses a pressure steel pipe assembly device, comprising: an assembly section including a base and an assembly sleeve; a radially arranged radial slide rail arranged in a ring array on the inner wall near one end of the assembly sleeve; a radial support rod slidably disposed within each radial slide rail; and a pressure steel pipe tile retainer at the end of each radial support rod; and radially telescopic rods arranged in a ring array at intervals from the radial slide rails on the inner wall of the assembly sleeve, the radially telescopic rods being distributed in multiple rows along the axial direction, each row including a vertical support, a telescopic crossbar, and a telescopic pressure rod. The top of the vertical support is at the same height as the center of the assembly sleeve, and the distribution of the telescopic pressure rods corresponds one-to-one with the radially telescopic rods distributed in the circumferential direction. A second jack is disposed at the top of each telescopic pressure rod. This invention can combine the assembly and adjustment processes, greatly improving the efficiency of pressure steel pipe manufacturing.

This invention discloses a method for calculating the axial distribution of the initial velocity of fragments in a cubic composite structure, aiming to solve the problem that existing models cannot accurately describe the axial distribution of the initial velocity of fragments in a cubic composite structure. This invention first obtains the Gurney initial velocity of natural fragments and pre-formed fragments based on the Gurney formula, and then, combined with end-effects, introduces the influence coefficient of detonation product leakage to perform a first correction on the initial velocities of the two types of fragments. Subsequently, it classifies the fragments according to the initiation point location. If the detonation occurs from the pre-formed fragment side, the radial leakage effect of detonation products at the pre-formed fragment needs to be considered additionally, resulting in a second correction on the initial velocity of the natural fragments. Numerical simulation using LS-DYNA software verifies that this invention can accurately predict the axial distribution of the initial velocity of fragments, providing support for warhead yield assessment.