32 results about "Friction effect" patented technology

The invention relates to the technical field of grinding equipment, in particular to a wind power flange edge hole grinding device which comprises a base, a plurality of stand columns are fixed to the top of the base, a supporting disc is fixed to the tops of the stand columns, a positioning mechanism is arranged at the top of the supporting disc and used for positioning a flange, and a plurality of spherical grooves are formed in the supporting disc. Balls are slidably connected to the interiors of the spherical groove bodies, the balls protrude out of the upper surface of the supporting disc, the balls are connected with locking mechanisms, and after the flange is positioned, the locking mechanisms are used for fixing the balls; the innovative design of the balls and the locking mechanism is adopted, the spherical grooves formed in the supporting disc are matched with the balls, low-friction flexible supporting is achieved in the positioning stage, the positioning efficiency is greatly improved, meanwhile, direct contact between the wind power flange and the supporting disc can be avoided, damage to the wind power flange due to the friction effect can be avoided, and the service life of the wind power flange is prolonged. And the flange reference surface precision is protected.

The utility model relates to a paint coating mould technical field proposes a kind of paint coating mould automatic aligning device, including frame body: the inside sliding connection of frame body has adjusting slider one, the side fixedly connected with pneumatic telescopic link of adjusting slider one, the extension end fixedly connected with fixed block of pneumatic telescopic link, the inside fixedly connected with motor two of fixed block, the output fixedly connected with rotating round plate of motor two, the rotation of rotating round plate can be realized by the motor two of being set, to be able to realize the rotation of positioning sleeve and threading block under the friction effect of antiskid ring one and antiskid ring two, further realize the rotation of threading body, the rotation of threading body can be limited in fixed position by the L-shaped limit rod and limit turntable of being set, the extension of threading body distance can be realized by telescopic pneumatic telescopic link.

Torsional vibration damper (10) for reducing torsional vibrations, comprising a first damper element (16) rotatable about a rotation axis (14) with a cover element (20), at least one spring element (24), a second damper element (28) which is rotatable about the axis of rotation (14) and which can be rotated to a limited extent relative to the first damper element (16) against the action of the spring element (24), an output component (44) which is coupled to the second damper element (28) in a rotationally fixed manner and which outputs a torque transmitted via the spring element (24) and the second damper element (28), a friction element (50) acting as a friction between the first damper element (16) and the second damper element (28), an axial spring element (48) fastened to the second damper element (28) and designed as a disc spring membrane, wherein the friction element (50) is subjected to an axial force (52) of the axial spring element (48) acting in the direction of the cover element (20), and wherein the friction element (50) is frictionally rotatable relative to the first damper element (16) to form a friction region (56) and is directly connected to the output component (44) in a rotationally fixed manner such that a first form-locking element (68) of the friction element (50) is connected to a second form-locking element (70) on the output component (44) in a form-locking manner, characterized in that the first form-locking element (68) extends radially inside the cover element (20), and in that the second form-locking element (70) is designed as a circumferential recess (72) on an outer circumference of the output component (44), wherein the circumferential recess (72) is arranged radially inside the cover element (20) and axially overlapping the cover element (20), and in that the friction element (50) has a radial section (62) from which the first form-locking element (68) extends axially away, wherein the first form-locking element (68) extends from the radial section (62) radially inside the cover element (20) in the axial direction and is designed as a circumferentially delimited projection (76).

The utility model discloses a deviation correction device of a conveying belt, which relates to the field of glass bottle production and is technically characterized by comprising a conveying frame, two conveying rollers are arranged in the conveying frame, the conveying rollers are sleeved with the conveying belt, and limiting rings are arranged on two sides of each conveying roller. And a plurality of correction bottom plates are arranged at the top of the conveying frame, so that the problems that under the condition of heavy load, the friction force between the conveying belt and the limiting rings is increased, the surfaces of the limiting rings are abraded and even possibly damaged due to the long-term friction effect, and the conveying belt is damaged due to the friction force between the conveying belt and the limiting rings are solved. The technical problems that due to the fact that the limiting ring loses the limiting effect, a conveying belt deviates from a preset track in the operation process, glass bottles incline or turn over in the conveying process due to deviation of the conveying belt, and the risk of bottle breaking is increased are solved.

According to the method for testing the effective prestress of the existing concrete structure considering the reverse friction influence, a plurality of prestressed tendons are pre-buried in concrete to form an in-service prestressed concrete member, and one prestressed tendon at the end part of the concrete is stretched by using a supplementary tensioning tool; in the stretching process, the obtained stretching stress of the prestressed tendon, the corresponding stretching length measured from the failure of friction constraint between an anchorage device and a wedge-shaped clamping piece of the prestressed tendon and the effective stress of the in-service prestressed concrete member are recorded for at least five times, and the obtained stretching stress and the corresponding stretching length are the secondary reverse friction force influence stress; selecting the friction coefficient of local deviation of the length per meter in the pore channel and the friction coefficient between the prestressed tendon and the wall of the pore channel from the anti-friction influence length corresponding to the anti-friction influence stress; finding out an optimal one; and calculating the effective stress of the out-service prestressed concrete member by using any recorded tensile length.

The utility model discloses a kind of pipe material segmented lifting equipment, belong to hoist technical field, its technical scheme main point is: including bunker, hoist and slide, bunker is used to accommodate pipe material, hoist is set in bunker, hoist is used to lift pipe material, slide is obliquely set in bunker, slide is used to guide pipe material in bunker to hoist, further include segmented device, segmented device is located in bunker, segmented device is used to limit the pipe material of bunker bottom to make it away from hoist, when the pipe material in bunker is below certain height, segmented device removes the restriction of pipe material at the bottom of bunker to make pipe material along slide close hoist, this lifting equipment is by segmented lifting pipe material, can effectively reduce mutual collision interference between pipe material, make pipe material keep relatively orderly distribution state, reduce the possibility of cross inclination, and extrusion friction effect between pipe material is weakened, reduce the risk of jamming and damage when feeding.

The present application relates to a kind of powder processing device and method for improving powder sphericity and surface finish, including processing cylinder and multiple rotating mechanism, lower rotating mechanism includes stirring blade, can be rotated in positive direction, upper rotating mechanism includes shaping blade, can be rotated in positive direction or reverse direction.The stirring blade of lower rotating mechanism is a certain obtuse angle with the direction of rotation, can better lift up powder, the shaping blade of upper rotating mechanism includes two inclined planes of positive and negative direction.The rotating direction of upper and lower rotating mechanism is opposite first, the inclined plane of shaping blade towards the direction of rotation is opposite with the direction of movement of the powder lifted up, angle is close to vertical, impact and break up agglomerated powder and satellite ball, then the rotating direction of upper and lower rotating mechanism is same, the inclined plane of shaping blade towards the direction of rotation is close to the direction of movement of the powder lifted up, mainly with friction effect, improve powder surface finish.The stirring blade of lower rotating mechanism makes the friction effect between powder particles in cylinder, can also quickly improve the surface finish of powder.

The application discloses a steel formwork with partially detachable end part of prefabricated long and large box girder, belongs to the technical field of prefabricated concrete beam production, and has a downward detaching mechanism for the bottom die strip in the range of width D close to the end part along the direction of the bridge, and has an outward detaching mechanism for the side die block in the range of height H close to the bottom along the vertical direction, and the surface of the bottom die strip and the side die block after being detached can form a height difference with the surface of the outer formwork, the height difference being h. The use method is as follows: after the concrete is poured and completed, the end part of the outer formwork is subjected to a preset detaching behavior before the prestressed steel strand is tensioned, so that the contact surface provided by the outer formwork can effectively adapt to the upward deflection of the beam body after the prestressed steel strand is tensioned, and thus the phenomenon that the stress is concentrated at the end part of the beam body and the friction effect is remarkable is effectively improved, and the problem that cracks are generated at the edge of the end part of the bottom plate during the prefabrication of the long and large box girder is fundamentally solved.

The invention belongs to the field of iron tower climbing, and particularly relates to an electric iron tower climbing anti-falling device which comprises a sliding rail, the sliding rail is arranged to be in a T shape, a mounting plate is arranged on one side of the sliding rail, a clamping assembly is arranged in the mounting plate, two sliding rods are symmetrically and slidably connected to the inner wall of the mounting plate, and one end of each sliding rod is fixedly connected with a first limiting block; the other ends of the two sliding rods are fixedly connected with second limiting blocks, and adjusting assemblies are arranged at the tops of the sliding rods. According to the climbing anti-falling device for the electric power iron tower, the position of a sliding rod is adjusted through cooperation of a clamping block and a clamping groove, a mooring rope is made to be away from the position of a mounting plate, when a constructor accidentally falls, the constructor can easily pry a second limiting block to move downwards through the weight, a rubber pad is made to tilt upwards and abut against the back face of a sliding rail, and the safety of the constructor is improved. The situation that the friction effect of the rubber pad is affected due to the fact that a linear falling line of constructors is close to a moving line of the falling protector is avoided.

The utility model discloses an electric power construction insulation operating rod which comprises a square tube and a screw rod, a connecting ring is fixedly installed at the bottom end of the outer side wall of the square tube, a bearing is fixedly installed on the inner side wall of the connecting ring, a rotating tube is fixedly installed at the top of the inner ring of the bearing, a nut is fixedly installed at the top end of the rotating tube, and the rotating tube and the nut are both located in the square tube. The bottom end of the square tube is connected with the bearing through the connecting ring, the inner ring of the bearing is connected with the nut through the rotating tube, the inner side wall of the nut is connected with the screw, the screw is connected with the inner side wall of the nut through the rotating tube, and the bottom end of the screw extends to the lower side of the interior of the square tube. During use, the bottom end of the square pipe can be located near the eyes of a worker, then operation is conducted, the height position of the hook can be calibrated conveniently, the limiting sliding block is composed of a square block and limiting wheels on the two sides, traditional sliding limiting is changed into rolling limiting, the friction effect is greatly reduced, and operation of the worker is facilitated.

The invention provides a numerical method and system for high-precision prediction of gas-driven piston motion in a powder dense-phase conveying process, and the method comprises the following steps: 1, taking a powder fuel supply system as a research object, setting an initial field of the research object, obtaining the physical properties and transportation conditions of a powder layer under the initial field of the research object, and calculating the physical properties of the powder layer; the initial static state of the piston is set as a starting point; 2, on the basis of a pre-constructed mesoscale solid phase corresponding force model, the total gas-solid resistance borne by the piston in the static state of the piston is obtained through calculation; 3, based on the gas-solid total resistance borne by the piston, the piston starting critical condition is set; 4, performing numerical simulation on piston motion based on a piston starting critical condition; according to the method, the actual stress environment of the piston is combined, solid phase corresponding force sudden change and the friction effect after powder deformation are comprehensively considered, the whole-process motion characteristic prediction of the piston from static state to dynamic stability has high credibility, and the problem of simulation distortion caused by inaccurate motion characteristics of a traditional model is solved.

The present application relates to the technical field of oil exploitation, and particularly relates to a method for testing cement-casing cementing strength based on friction effect, which comprises the following steps: performing cement-casing interface cementing strength experiment, collecting displacement, pressure and strain data of strain gauge of cement extrusion, and drawing load-displacement curve; performing rock mechanics experiment to obtain cement stone elastic parameters; establishing cement-casing interface cementing strength model of friction effect; constructing cohesive unit of friction effect by using Fortran; establishing cement-casing geometric model in ABAQUS software, inputting elastic parameters of cement-casing into unit body of the geometric model; and obtaining calculation results of cement-casing cementing surface according to finite element simulation results. In the present application, the cement-casing interface cementing strength is characterized by pressure when the interface is damaged, but in the damage process, there is friction effect in addition to cementing effect, and it is inaccurate to use shear strength to characterize cementing strength.

The utility model relates to the technical field of ground cleaning machines, and discloses a ground cleaning machine adjusting mechanism which comprises a cleaning machine body, the cleaning machine body comprises a machine frame, moving wheels are arranged at the bottom end of the machine frame, an installation cover is embedded in the center of the machine frame, a through hole is formed in the surface of the installation cover, and a dust suction pipe is inserted into the through hole. A dust suction opening is formed in the bottom end of the dust suction pipe, and a movable plate and a fixed plate are arranged on the surface of the dust suction pipe from top to bottom. According to the adjusting mechanism of the ground cleaning machine, in the using process, the buffering adjusting assembly is arranged, a movable plate is slidably installed on the surface of a limiting sliding rod, and the movable plate is driven to move downwards through an abutting spring, so that a sweeping roller can abut against the ground, and the friction effect between the sweeping roller and the ground is ensured; and when rigid collision occurs between the sweeping roller and an external object, the sweeping roller can move upwards to avoid through upward movement of the movable plate, and the effect of avoiding and buffering in the vertical direction is achieved.

The present invention relates to the assembly of panel furniture (bookshelves, cabinets, kitchen units, office furniture, etc.), and in particular to an apparatus used to secure panels produced on CNC router machines for assembling them perpendicularly to one another, characterized in that it comprises the main body type 1 (3) comprising the elements of the lower base (3.4) which is placed by being slid horizontally along the x- axis into the said rabbet (F) and formed as a result of body channels (3.9) drilled on both edges using the milling method, the saw tooth part (3.5) which prevents the apparatus from moving forwards by increasing the frictional effect on the walls of the said rabbet (F), the screw hole (3.3) which allows the seating of the said minifix screw (2), female part (3.7) with three legs formed in the y-direction at the bottom of the fitting surface (3.6), the alignment protrusions (3.2) formed above and below the said screw hole (3.3), the main body cap (3.1) which fits over the edges of the chamfer (P) and ensures centering, and center hole (3.10) which allows chip dust to accumulate under the body; the auxiliary body type 1 (4) comprising the elements of flanks (4.2) which are assembled by moving in the y-axis direction towards the said fitting surface (3.6) such that the said alignment protrusions (3.2) are seated via the opening (4.1) and which exert pressure on the side walls of the said alignment protrusions (3.2), lock hole (4.3) which allows the insertion of the said locking apparatus (5), serrated surface (4.4) which increases the attachment strength of the body to the pressing panel (A), the male part (4.5) which provides clamping in the x-axis by passing over the said female part (3.7), and auxiliary body cap (4.6) fitted on the edges of the chamfer (P); and cover type 1 (6) concealing the body by being placed on the said auxiliary body type 1 (4).

The invention discloses self-adaptive beveling and welding integrated equipment for a small-caliber pipeline, and relates to the field of pipeline welding, the self-adaptive beveling and welding integrated equipment comprises a base, and a fixing mechanism is arranged on the upper portion of the base. The self-adaptive beveling and welding integrated equipment for the small-caliber pipeline has the functions of clamping, transporting and rotating the pipeline and beveling and welding, and the pipeline can be accurately conveyed to the positions of a beveling machine and a welding machine, so that the welding efficiency is improved, and the production cost is reduced. Meanwhile, the angle of the beveling machine is fixed through the friction effect between the positioning nut and the beveling seat and between the bracket and the beveling seat, so that the beveling machine is more convenient to debug, the beveled positions of the pipelines are cleaned by the iron brush after beveling of the pipelines is completed, and pipeline welding is completed under the condition that the two pipelines rotate at the same speed.

The utility model discloses a piezoelectric actuator comprising an elastic tube, two ends of which are respectively provided with a first port and a second port; the first sealing piece is arranged at one end of the elastic pipe and seals the first port; the second sealing piece is arranged at the other end of the elastic pipe and seals the second port, and a sealed cavity is defined by the elastic pipe, the first sealing piece and the second sealing piece; the stack piezoelectric ceramic is arranged in the closed cavity, the two ends of the stack piezoelectric ceramic are connected with the first closed part and the second closed part respectively, and the elastic pipe is always in a stretched state; one of the first sealing piece and the second sealing piece is provided with a wire for electrically connecting the stacked piezoelectric ceramic with an external power supply, and the other one is provided with an actuating end for applying pressure to the outside. According to the application, the elastic tube can be driven to deform along with the deformation of the stacked piezoelectric ceramic by utilizing the characteristic that the elastic tube can be telescopically deformed. Therefore, an existing shaft hole matching structure can be omitted, and the negative influence of the friction effect on the output linearity of the stacked piezoelectric ceramic is avoided.

The utility model discloses an impeller assembly for an impact crusher, which is positioned in an impact cavity and comprises an impeller body and a flexible cleaning structure which is arranged on the impeller body and synchronously rotates along with the impeller body, and a crushing discharge port is formed between the impeller body and a bottom plate of the impact cavity. And the flexible cleaning structure is positioned above the crushing discharge port to clean the crushing discharge port so as to prevent the crushing discharge port from being blocked by crushed materials. The flexible cleaning structure is arranged on the impeller body and rotates along with the impeller body attached to the discharging port, materials are prevented from being stacked at the discharging port, the flexible rope chain rotates along with the impeller, bonding materials on the path are continuously whipped, the material nesting area is reduced, and the effective use size of the impact cavity is increased; and the impact friction effect between the materials is improved, and the shaping and crushing effect of the materials is improved.

Provided are sliding components capable of obtaining a stable low-friction effect under a wide range of conditions of use. A sliding component has a relatively sliding surface. A base material of one of the sliding components is coated with a graphite film, and the sliding surface of the other of the sliding components is made of the graphite film.

The mechanical arm for machining comprises a top plate and a protruding block, the protruding block is fixedly connected to the bottom end of the top plate, four electric telescopic rods and a rotary torsion rod are evenly and fixedly installed on the side wall of the protruding block in the circumferential direction, so that the protruding block can be clamped into two arc-shaped grooves, and unstable material clamping can be prevented; the corresponding torsion bar is rotated to pass through the space between the two connecting plates, then the L-shaped plate can be disassembled, when heavy materials need to be clamped, oil is continuously added into the oil cylinder through a pump, the friction plate is driven to move upwards along with the oil cylinder, the friction effect between the friction plate and the materials is increased, the heavy materials can be clamped, and the work efficiency is improved. When the friction plate moves upwards, the first U-shaped block also moves upwards along with the friction plate, at the moment, under the action of the hinge rod, the base plate is driven to extend out of the collecting groove along the inner bottom face of the collecting groove to be cushioned at the bottom end of materials, the supporting effect is achieved, the materials can be prevented from falling off, and harm to operators is reduced.

The utility model discloses an intelligent material surface wear resistance detector belongs to wear resistance detector technical field, including the feeding table, is installed with the support portal on it, and the transmission frame is slidably installed on the support portal, and the hydraulic cylinder is installed on the support portal simultaneously, and it is used to drive transmission frame to move up and down, and the force measurement presses down the frame, and it is installed in transmission frame downside, and the friction roller subassembly is installed in force measurement presses down the frame downside, and the rotary drive mechanism is used to drive friction roller subassembly rotation. Its technical key points are: in the detection process, because friction roller subassembly always is in conformity with material surface and its applied pressure is almost invariable, can ensure the stability of the friction effect that applied in the test process, and will not cause the deformation of material surface to impact, in addition, when simulating different test conditions, the force that spring force measuring mechanism transmits is adjusted through the stroke control of hydraulic cylinder, and then the wear resistance of material surface is measured under different pressure working conditions.

The utility model discloses a quick clamping and fixing buckle iron mechanism, which relates to the technical field of limiting tools and comprises a guide sleeve, a limiting disc is arranged at one end of the guide sleeve, a mounting opening is formed in the guide sleeve along the length direction in a penetrating manner, and a hinge shaft is arranged between two sides of the mounting opening and is perpendicular to the axis direction of the guide sleeve. A locking piece is rotationally arranged in the mounting opening through a hinge shaft; the locking piece comprises a locking part, a hinging part and a driving part, locking teeth are arranged on one side of the locking part, friction is generated between the locking teeth and the optical axis to reduce axial sliding of the guide sleeve, a mounting table is arranged at one end of the mounting opening, a spring is arranged on the mounting table, one end of the spring is connected with the driving part, and the locking part rotates forwards and backwards around a hinging shaft by pressing the driving part; according to the utility model, the locking piece is elastically arranged on the guide sleeve, and the sliding of the disc core on the optical axis is limited through the friction action of the locking piece and the optical axis.

A high-performance thrust bearing comprises an upper shell, a lower shell, and a friction-reducing gasket group. The upper shell comprises an inclined surface. The angle between the inclined surface and the central axis of the upper shell in a cross section along the arrangement direction of the upper shell and the lower shell is an acute angle. The lower shell comprises a receiving groove. The receiving groove is rectangular in a cross section along the arrangement direction of the upper shell and the lower shell, and the length of the rectangle is parallel to the inclined surface. The friction-reducing gasket group consists of a plurality of friction-reducing gaskets, and two adjacent friction-reducing gaskets must be tightly pressed against each other. The inner diameter of the friction-reducing gasket of the annular arc structure is equal to the inner diameter of the annular receiving groove, and the outer diameter of the friction-reducing gasket of the annular arc structure is smaller than the outer diameter of the annular receiving groove. This thrust bearing not only causes friction on both sides of the friction-reducing gasket to improve the friction effect, but also increases the life of the friction-reducing gasket.

The utility model discloses a placing rack for copper rod production, which structurally comprises a placing box, a bottom plate and limiting rods, the position of an inner groove is adjusted through connecting screw rods on the inner sides of the limiting rods, so that the distance between the limiting rods is convenient for placing a copper rod, and then the copper rod is placed between the limiting rods. The bottom ends of the copper rods are inserted into bottom positioning holes, and the copper rods can be inserted into different limiting rods for insertion placement under rotation of the center columns, so that the situation that the copper rods are stacked is avoided, the friction effect between the copper rods is reduced, the lifting plate drives the upward center columns to be upward under pushing of the electric push rods, and the copper rods are placed in the center columns. Therefore, the top end of the copper rod makes contact with the top plate to apply acting force, the pressure sensor stops moving upwards after being stressed, the upper end and the lower end of the copper rod are stressed, clamping work of the copper rod is achieved, the situation that the copper rod shakes is avoided, stability is better, mutual collision is reduced, and storage safety is better.

The invention relates to the technical field of additive manufacturing of metal materials, and discloses an axial in-situ ultrasonic-assisted friction stir solid-phase additive manufacturing device and method. The device comprises a shaft tube and a rotating main shaft arranged in the shaft tube in a penetrating mode; the conical shaft sleeve is arranged at the bottom end of the shaft tube; the conical screw rod is arranged in the shaft sleeve and is connected with the rotating main shaft; a stirring needle is arranged at the bottom end of the conical screw rod; the ultrasonic mechanism is provided with an ultrasonic tool head abutting against the top end of the main shaft, and the feeding piece communicates with the conical shaft sleeve. The method comprises the steps that a shaft tube is moved, the size of an additive body and the thickness of an additive layer are preset, and a moving path is planned; starting an ultrasonic mechanism and driving a rotating main shaft to rotate, so that the materials are plasticized under the friction effect; the shaft tube is moved according to a planned path until material adding is finished; according to the device and method, the plasticizing efficiency of the material and the forming quality of the additive body can be improved, good combination between layers of the additive body is achieved, the forming precision and the equipment stability are guaranteed, and efficient and high-quality continuous additive manufacturing is achieved.

The utility model discloses fabric wear resistance testing equipment, and relates to the technical field of fabric wear resistance testing, the fabric wear resistance testing equipment comprises an equipment main body and a testing mechanism, the testing mechanism is arranged above the equipment main body, through the arrangement of the testing mechanism, a fabric needing to be tested is placed on a testing table, a friction head is driven to fall onto the fabric through the lifting of a lifting main shaft, and the fabric is tested. Friction testing is conducted on the fabric, the testing frame is driven to rotate through rotation of the electric control rotating disc, the friction head conducts rotary friction on the fabric, the fabric friction comprehensiveness is improved, the friction effect is improved, the friction head is driven by the electric control telescopic rod to stretch out of the testing frame, and the fabric friction pressure can be finely adjusted; meanwhile, friction heads made of different materials such as plastic, wood or metal are arranged, the different friction heads stretch out through an electric control telescopic rod, friction testing of different contact objects is conducted on the fabric, and the comprehensive and overall testing effect of the fabric testing is improved.

The utility model discloses an anti-skidding type scissor lift which comprises a base and a top seat, a lifting mechanism is arranged in the middle of the top seat and the base, a supporting bottom plate is fixedly connected to the bottom end of the base in a threaded mode, and an anti-skidding bottom plate for increasing supporting friction force is arranged at the bottom end of the supporting bottom plate. Embedding blocks for mounting are fixedly mounted at the bottom end of the supporting bottom plate, the embedding blocks are symmetrically and fixedly mounted at the bottom end of the supporting bottom plate, and embedding grooves are symmetrically formed in the top end of the anti-skid bottom plate; the hydraulic cylinder drives the antiskid plate to press downwards, antiskid strength can be flexibly controlled, different ground conditions can be adapted, universality is enhanced, special texture design of the antiskid plate greatly improves friction force between the antiskid plate and the ground, stable ground gripping is ensured, and a double antiskid structure of the antiskid bottom plate and the antiskid plate not only increases contact area, but also strengthens friction effect. The anti-skid function can be quickly started and relieved, the stability and safety of the elevator during lifting operation are effectively guaranteed, the sideslip risk is reduced, and the operation reliability is improved.

The invention discloses a double-row opposite spanning frame stress analysis method which comprises the following steps: acquiring a wind load based on structure parameters and environmental parameters of a spanning frame; based on the wind load and the pull force of the bearing rope, calculating the pull force of the cable rope by combining the included angle of the cable rope to the ground; based on the accident state wire parameters, calculating wire downforce; calculating a horizontal load based on the lead down force and the friction coefficient; and based on the wind load, the tension of the bearing rope, the horizontal load, the tension of the cable wind rope, the downward pressure of the wire and the structural parameters of the spanning frame, completing the stress analysis of the double-row opposite spanning frame. According to the method, the comprehensiveness and accuracy of stress analysis of the double-row opposite crossing frame can be comprehensively improved, and the limitation of a traditional empirical formula and a simplified model is effectively overcome. By comprehensively considering the coupling influence of multiple factors such as the wind-cable coupling effect, the accident impact load and the friction effect, the reliability of structural safety assessment is remarkably improved.

The utility model discloses a clamping tool for cold drawing of a stainless steel pipe, which belongs to the technical field of clamping tools and comprises an outer clamping frame and an inner clamping frame, outer clamps capable of being adjusted up and down are arranged at the upper end and the lower end of the outer clamping frame, the outer clamps are used for clamping the outer wall of a pipe fitting, the inner clamping frame is mounted in the outer clamping frame, and inner clamps are mounted on the inner clamping frame and used for clamping the outer wall of the pipe fitting. The inner clamp is used for abutting against the inner wall of the pipe fitting and comprises a fixed clamping plate fixedly arranged on the inner clamping frame and a movable clamping plate connected with the inner clamping frame in a sliding mode. The technical key points are as follows: the outer clamp can apply pressure to the outer wall of the pipe fitting, and the inner clamp can apply external thrust to the inner wall of the pipe fitting, so that the adjacent outer clamp and inner clamp can be matched with each other to firmly clamp the pipe wall, and the clamping mode hardly causes deformation of the clamped part of the pipe fitting; and meanwhile, the contact area between the clamping tool and the pipe fitting can be greatly increased, the friction effect is strengthened, and the pipe end is not prone to slipping in the drawing process.

The internal supporting type grouting anchor rod comprises a pushing rod, a drill bit and a pressing locking piece, a first liquid guiding channel is formed in the pushing rod, a first grouting hole is formed in the outer wall of the pushing rod, and an external expansion acting inclined face is formed at the connecting end of the pushing rod; a second liquid guide channel which is aligned and communicated with the first liquid guide channel is formed in the drill bit, a plurality of second grouting holes are formed in the outer wall of the drill bit in the circumferential direction, and an external expansion guide inclined plane which is bonded and connected with the external expansion acting inclined plane is formed at the connecting end of the drill bit; when the extrusion force applied between the pushing rod and the drill bit exceeds a preset value, the pushing rod moves relative to the drill bit, and the external expansion guide inclined plane guides the external expansion action inclined plane, so that the connecting end of the pushing rod expands outwards; the pressing locking piece is connected to the end, away from the drill bit, of the pushing rod. Compared with the prior art, the friction effect between the anchor rod and a soil body is increased, formation of an anchoring layer is facilitated, larger pre-tightening force can be conveniently applied to the anchor rod, and therefore a more stable pressure arch is formed.