1281results about "Angles/taper measurements" patented technology

The utility model provides a difunctional angle measuring instrument, which relates to the technical field of angle measuring instruments, and comprises a first graduated scale, one side of the first graduated scale is fixedly connected with a circular shaft, the outer ring of the circular shaft is rotatably connected with a second graduated scale, one side of the second graduated scale is provided with a first sliding chute, and the second graduated scale is provided with a second sliding chute. A first sliding groove is formed in one side of the first graduated scale, a second sliding groove is formed in the other side of the second graduated scale, angle scale marks are arranged on one side of the second graduated scale, a pointer is fixedly connected to one side of the first graduated scale, and one end of the pointer penetrates through the first sliding groove and points to the angle scale marks. Therefore, the rotating angle of the arc-shaped rack driven by the rotating gear is small, so that the effect of accurately adjusting the second graduated scale is achieved, the situation that the force is too large or too small during operation can be avoided, the measurement accuracy is improved, the angle measuring instrument is convenient to use, and the use effect is improved.

The invention provides a machine tool guide rail welding device with detection structures, and relates to the technical field of welding equipment.The machine tool guide rail welding device comprises a mounting mechanism, a limiting rod is taken down from a base body, two movable frames are made to move towards the middle at the same time, whether the detection rods on the detection mechanisms on the two sides can be inserted into detection holes in the detection mechanisms on the opposite sides or not is observed, and if yes, the detection mechanism is started; by means of the design, the traditional complicated detection process is abandoned, the detection time is greatly shortened, and the problems that an existing welding device is lack of a built-in auxiliary detection structure, and after the guide rails are welded, the welding quality is checked, and the detection efficiency is greatly improved are solved. In the prior art, a user has to implement evaluation by means of an external special detection device, so that the capital investment of an enterprise for purchasing professional detection equipment is additionally increased, and the links of equipment preparation, operation, data reading and analysis and the like before and after each detection consume a lot of time, and the overall production and processing efficiency is greatly reduced.

The invention discloses a multi-angle rotating platform and method, and belongs to the technical field of measurement, the multi-angle rotating platform comprises a lower bottom fixing seat, a horizontal rotating mechanism and a vertical rotating mechanism, the horizontal rotating mechanism comprises a lower bottom rotating disc, a rotating shaft fixedly connected with the lower bottom fixing seat, and a mounting plate connected with the lower bottom fixing seat; the rotating shaft is sleeved with the rotating fluted disc and fixedly connected with the lower bottom rotating disc, the lower bottom rotating disc is provided with a horizontal dial, the rotating shaft is rotationally connected with the lower bottom rotating disc, and the horizontal driving assembly penetrates through the mounting plate and is meshed with the rotating fluted disc; the vertical rotating mechanism comprises a supporting plate fixed to the lower bottom rotating disc, a supporting rotating shaft rotationally connected with the supporting plate, an upper top plate with a carrying area, a vertical dial arranged on the supporting plate, a vertical angle pointer and a vertical driving assembly, and the axis of the supporting rotating shaft is perpendicular to the axis of the rotating shaft. According to the invention, the technical effects of improving the operation convenience and facilitating the improvement of the measurement precision and efficiency are achieved.

The present invention discloses a load-bearing capacity detection device and detection method based on an automobile transmission shaft, comprising a connecting seat, wherein both ends of the upper side of the connecting seat are provided with a fixed frame, an automobile transmission shaft is placed on the upper ends of the two fixed frames, the tops of the two fixed frames are fixedly connected to a cylinder, the bottoms of the two cylinders are connected to a pressure frame, a hydraulic cylinder is provided at the top of the middle part of the connecting seat, and a pressure member is connected to the bottom of the hydraulic cylinder. The present invention relates to the technical field of load-bearing capacity detection of automobile transmission shafts. This load-bearing capacity detection device and detection method based on an automobile transmission shaft, when the automobile transmission shaft is deformed, the deformation part of the upper end of the automobile transmission shaft pushes the rotating frame to rotate, and the rotating end of the rotating frame drives the pointer to rotate. When the user closes the hydraulic cylinder, the pointer and the dial are observed through the rectangular lens to obtain the rotation angle of the deformed end of the automobile transmission shaft. During the deformation process of the upper end of the automobile transmission shaft, the splashing debris generated by the automobile transmission shaft is blocked by the rotating frame.

The utility model relates to the technical field of measuring tools, in particular to a revolved body workpiece filing comprehensive measuring tool which comprises a seat body and a cantilever assembly arranged at the upper end of the seat body. The mandrel comprises a positioning section used for positioning a workpiece to be measured and a locking section used for integrally locking the mandrel on the seat body, a locking assembly is arranged on the locking section, the workpiece to be measured sleeves the positioning section in a matched mode, and a first measuring assembly matched with the closed gas pipe for limiting and a second measuring assembly matched with the locking hole seat for filing and measuring are connected to the cantilever assembly. The cantilever assembly comprises a main cantilever located above the mandrel and a side cantilever located on the side of the mandrel, the first measuring assembly is arranged on the side cantilever, and the second measuring assembly is arranged on the main cantilever. The utility model further relates to an operation method of the comprehensive filing measuring tool for the rotary body workpiece. According to the scheme, filing machining can be carried out on the rotary body workpiece, and comprehensive measurement of the angle and the symmetry degree is carried out.

The invention discloses a test device for detecting the pressure-bearing performance of a fire hose, and relates to the technical field of fire hose pressure-bearing detection.The test device comprises a main frame, the outer wall of one side of the main frame is fixedly connected with a side frame, and the top of the main frame is provided with a butt joint pipe used for fixedly and hermetically connecting a hose body; a fixing plate is arranged on the top of the main frame, and the butt joint pipe is fixedly connected with the fixing plate. According to the device, when a worker bends the water hose body to a certain angle and then stops bending, through the self-locking performance between a screw rod and a threaded sleeve, it can be guaranteed that the two fixing plates do not displace in the subsequent water hose body stamping process, and then it is guaranteed that the water hose body is always located at the set bending angle for pressure bearing detection; and the problems of unstable detection conditions and data deviation caused by the bending angle change due to the displacement of the fixed plate are avoided.

The invention discloses a coaxiality detection device for steel pipe production and manufacturing, which comprises a detection table, a detection guide rail is fixedly arranged on one side of the top of the detection table, driving bases are fixedly arranged at the two ends of the detection guide rail, and a ball screw is rotatably arranged in the middle of the detection guide rail. According to the steel pipe coaxiality detection device, the two steel pipe erecting mechanisms and the detection mechanism are installed on the detection guide rail in a sliding mode, during detection, a to-be-detected steel pipe can be erected and driven by a gear motor, the to-be-detected steel pipe can be driven to rotate, the detection mechanism can move, and a measuring arm can move at a constant speed along the rotating to-be-detected steel pipe; the position degree of each point inside and outside the steel pipe is collected, the coaxiality of the steel pipe is reflected by comparing and modeling the position degrees of the inner and outer points of the steel pipe, the data volume collected by a single steel pipe is large, the error is smaller, and the detection accuracy is improved.

The utility model discloses a cone shaft size measuring tool which comprises a calibration gauge and a measuring gauge. One end of the calibration gauge is provided with a measuring surface, the measuring surface is provided with taper, one end of the measuring gauge is provided with a first reference surface and a second reference surface, a step is arranged between the first reference surface and the second reference surface, the step is provided with a through hole along the axial direction of the measuring gauge, and the inner side of the through hole is a working surface. The working face is provided with taper, and the measuring face is matched with the working face. The measuring tool provided by the utility model is simple in structure and principle, flexible and convenient to operate and low in cost, is a comprehensive inspection tool, and can inspect the taper of the measured cone shaft and the diameter of the measured cone shaft. The device is suitable for the measurement of the detected cone shaft with high precision requirements, is accurate in detection result and high in detection efficiency, can be used for large-scale detection, and has good popularization and application values.

The utility model belongs to the technical field of product detection, and discloses an angle detection device. The angle detection device comprises a base and a rotating shaft, the base is used for fixing a motor, a detection hole is formed in the base, the detection hole can directly face an output shaft of the motor, angle scales are arranged on the outer surface of the base, and the angle scales surround the peripheral side of the detection hole; the rotating shaft penetrates through the detection hole, is matched with the output shaft and can drive the output shaft to rotate from a first position to a second position; the pointer is arranged on the peripheral side of the rotating shaft and can point to the angle scales. The angle detection device is convenient to operate in the detection process, accurate in detection and high in precision, and the detection efficiency of the motor is improved.

The utility model discloses a portable anchor rod drilling machine angle gauge, and belongs to the technical field of anchor rod and anchor cable construction in underground roadway supporting. The portable roofbolter angle gauge comprises a connecting block body, a flexible lock belt, a buckle, a vertical ruler, a plumb line and an angle graduated scale, two ends of the connecting block body are respectively connected with a flexible lock belt, and one end of the flexible lock belt is provided with a buckle; the lower part of the connecting block body is vertically connected with the vertical ruler, the plumb line is fixed below the connecting block body, and the connecting block body fixes the angle gauge on the jumbolter through the flexible locking belts and the buckles on the two sides; the angle graduated scale is vertically connected with the vertical ruler. The device is simple in structure, low in cost, small in size and convenient to carry; the anchor rod angle positioning device can be conveniently and tightly attached to an anchor rod drilling machine, accurate positioning of the angle of an anchor rod is rapidly achieved, the construction precision of the angle of an anchor rod cable is greatly improved on the premise that construction is not affected, and powerful guarantee is provided for exerting the efficiency of a supporting structure.

A method for identifying geometric errors in a machine tool includes the steps of: positioning a reference sphere so as to align its center with a centerline of a tool spindle; attaching a position measuring device having a gauge head to a rotation unit so as to direct the gauge head toward a rotation centerline of the rotation unit; acquiring displacement data relative to the center of the reference sphere by measuring positions of the reference sphere with the gauge head while rotating a rotation target (the swivel unit or the rotation unit) with the gauge head directed toward the center of the reference sphere, the displacement data being dependent on rotation angles of the rotation target; and identifying the geometric errors by least squares method using a mathematical expression having terms containing the geometric errors and representing displacement dependent on the rotation angles, and the displacement data.

The invention belongs to the technical field of swivel bridge detection, and particularly relates to a swivel bridge horizontal alignment detection device which comprises a mounting seat fixed to the upper end of an abutment, a controller is fixedly connected to the side wall of the mounting seat, and two guide boxes are symmetrically and fixedly connected to the upper side wall of the mounting seat. After the swivel bridge construction is completed, mechanical contact detection is arranged on the abutment, compared with a detection assembly arranged between two swivel bridges which are spaced by four meters, a fixed and accurate mounting reference can be provided for the detection device by means of a stable structural foundation of the abutment, and a detection structure does not need to be arranged between the bridges which are spaced by four meters; the problems of inconvenient operation, large assembly fixing difficulty and the like caused by cross-interval installation are avoided, the bending deformation of the detection rod due to the gravity of the detection rod can be effectively avoided, and the detection precision is guaranteed from the installation reference and the detection structure.

The invention discloses a universal limited-angle motor working angle measuring device which comprises a base, a sliding table and a mounting table are arranged on the base, a positioning key and a positioning block are arranged on the mounting table, a flat plate is horizontally connected to the sliding table, an annular angle scale is mounted on the flat plate, and after a motor is positioned on the mounting table through the positioning key, the motor is positioned on the mounting table through the positioning key. A motor shaft of the motor is coaxial with the through hole and the annular angle scale; the part of the motor shaft extending out of the annular angle scale is provided with a pointer. The measuring device can ensure that the measuring datum is uniform, the testing efficiency is improved, and meanwhile the problem that an existing clinometer is difficult to deploy is solved. By arranging the movable positioning key and the positioning block, the motor to be measured and the annular angle scale can be coaxially assembled, so that the accuracy of a measured value is improved. Furthermore, the movable positioning key and the positioning block are matched with the lifting of the sliding table, so that the device can be suitable for the assembly and measurement of various motor specifications, and the applicability of the measurement device is improved.

The utility model discloses a slope control auxiliary device for slope protection construction, which comprises a stand column, two positioning lines are connected to the stand column, and the two positioning lines are parallel to each other and are sequentially distributed along the length direction of the stand column; the first adjusting assembly and the second adjusting assembly are installed on the stand column, the two positioning lines are connected to the first adjusting assembly and the second adjusting assembly correspondingly, and the first adjusting assembly and the second adjusting assembly are configured to be capable of driving the two positioning lines to move in the length direction of the stand column correspondingly; the distance between the two positioning lines is adjusted; the angle control assembly is installed on the first adjusting assembly and connected with the adjacent positioning line; through the first adjusting assembly, the second adjusting assembly and the angle control assembly, the precision and efficiency of slope protection construction gradient and depth control are improved, the flexibility is high, the stability is good, the uncertainty and errors of manual operation are reduced, and the construction quality is guaranteed.

The present invention discloses a spindle gear adjustment tool, comprising a support base, a detector, a detection turning tool, and a control device; the support base is used to mount a spindle component; the detection turning tool is mounted on the spindle component, a first precision detection surface is provided on the detection turning tool, and a second precision detection surface is provided on the spindle component; the detector detects the parallelism of the first precision detection surface relative to the second precision detection surface. The present invention adjusts the angular position of the fixed gear and the rotating gear of the spindle before the spindle is mounted on the machine tool ram; the present invention also discloses a spindle gear adjustment method, wherein the spindle is adjusted to eliminate the influence of the angular position deviation of the fixed gear and the rotating gear, and to reduce the influence of the gap between the spindle height key and the tool keyway on the angular position.

The invention belongs to the field of mechanical precision detection, and relates to a ram five-shaft head spigot and direct drive motor spigot assembly coaxiality detection method. According to the technical scheme, the method comprises the following steps that (1) a ram is fixed to a ram fixing tool, a direct drive motor is installed in the ram, and a direct drive motor spigot in the ram is used for positioning; 2) fixedly connecting the detection rod with a motor shaft of the direct drive motor by using a coupler; 3) installing a wheel meter tool on the motor shaft, and detecting the coaxiality of the swing head installation hole and the motor shaft and the run-out precision of the swing head installation end face through the wheel meter tool; (4) a magnetic gauge stand is attracted to a five-axis head spigot of the ram, a dial indicator is installed on the magnetic gauge stand, and a measuring head of the dial indicator is made to be perpendicular to the outer circle surface of the detection rod; and 5) slowly rotating the detection rod, and detecting the coaxiality of a plurality of positions of the detection rod through the dial indicator. According to the invention, the coaxiality of the spigot can be rapidly and accurately detected in the equipment assembling process, the detection efficiency and precision are improved, and the dependence on the technical level of detection personnel is reduced.

The invention provides a four-point supporting three-point leveling mechanism and a leveling method for a precision measuring table, and belongs to the technical field of precision measuring table leveling. Four-point supporting is achieved through the two piezoelectric ceramic stacking micro-displacement mechanisms and the two air springs, stability is improved, communication of the two air springs is equivalent to single-point supporting, three-point leveling is achieved by controlling the two piezoelectric ceramic stacking micro-displacement mechanisms, and control precision is improved; a piezoelectric ceramic stack is adopted to push a top block, a leveling top ball and a wedge block to realize micro-displacement adjustment, and high-precision control and quick response are completed. The four-point supporting three-point leveling mechanism of the precision measuring table has good dynamic stability, the steady-state error reaches 10-5 degrees, friction lag and assembly stress caused by surface contact are avoided through single-point contact of the leveling top ball and the wedge-shaped block, and precision automatic leveling in the mandrel measuring process can be achieved.

The utility model relates to the technical field of engine detection, and discloses an engine flywheel housing coaxiality testing fixture, which comprises a base, a first V-shaped frame is fixedly mounted on the top of the base, a second V-shaped frame is slidably mounted on the top of the base, a rotating assembly is mounted on the first V-shaped frame, a detection assembly is further mounted on the top of the base, and the second V-shaped frame is slidably mounted on the second V-shaped frame. The first V-shaped frame and the second V-shaped frame are used for supporting a crankshaft, the rotating assembly is used for dragging the crankshaft to rotate around the axis of the crankshaft, and the detection assembly is used for pressing and positioning the crankshaft and detecting the coaxiality of the crankshaft and a flywheel shell. Compared with the prior art, manual rotation of the crankshaft is not needed, the automation degree is high, convenience is brought to operation of workers, and in addition, in the rotation process of the crankshaft, the stability of the crankshaft in the detection process is improved through pressing and positioning of the pressing roller.

The utility model relates to a small sheet metal part detection tool, and relates to the sheet metal part detection technology field, the small sheet metal part detection tool comprises a bottom plate, the bottom plate is vertically provided with a detection block, the detection block is horizontally provided with a first detection rod used for detecting the bending angle of a sheet metal part, the first detection rod is arranged to be vertical to the detection block and is in sliding connection with the detection block, and the first detection rod is provided with a second detection rod used for detecting the bending angle of the sheet metal part. The detection block is also horizontally provided with a second detection rod used for detecting the size of the end part of the sheet metal part. According to the invention, the first detection rod is movably arranged, so that the detection tool can adapt to the detection of bending parts with different lengths, the position of the first detection rod is adjusted, the first detection rod abuts against the sheet metal part body, and the abutting condition of the bending part and the side surface of the first detection rod is observed, thereby facilitating the judgment of whether the bending angle is qualified or not. The position of the second detection rod is adjusted, and if the second detection rod cannot extend out or the gap is too large after the second detection rod extends out, the detection rod is unqualified.

The utility model discloses an angle detection device for a chord angle of a turbine blade of an aero-engine, and belongs to the technical field of manufacturing of turbine blades of aero-engines. The device comprises a base, and the base is provided with a blade mounting part used for mounting the turbine blade of the aero-engine; the angle detection assembly comprises a vertical supporting plate and a rotation detection piece, the rotation detection piece comprises a stopping plate and an angle positioning pin, one end of the stopping plate is provided with a stopping straight edge, and the stopping straight edge is used for stopping the blade front edge and the blade rear edge of the aero-engine turbine blade; and the angle mark is provided with angle scales, and when the stop plate rotates, the angle positioning needle can point to the angle scales. According to the method, the blade chord angles of the blade front edge and the blade rear edge of the detection section of the aero-engine turbine blade can be detected, detection of the detection section of the aero-engine turbine blade is achieved, and evaluation of the quality of the aero-engine turbine blade is facilitated.

The utility model provides a rotation angle measuring device for an adjustable stator blade of a gas compressor. The rotation angle measuring device comprises a dial and an indicating structure, wherein the dial is fixedly arranged on the compressor casing; the indicating structure is connected with the adjustable stator blade, and the indicating structure can rotate along with the adjustable stator blade, so that the indicating structure has an indicating effect of indicating the rotating angle of the adjustable stator blade relative to the position change of the dial. The rotation angle measuring device can conveniently realize the measurement of the rotation angle of the adjustable stator blade.

In the embodiments herein, an instrument for level and plumb determinations, includes: a sealed chamber of equal dimensions made from transparent or translucent material marked with center lines and filled with a colored fluid, so when placed on any surface. Relative to the orientation of the surface to the face of the earth, the instrument reveals if a surface is: plumb within an upright position; level within a horizontal position; or at an angle, which can be marked and transferred. Reference lines are placed exactly parallel and centered to the sides and ends.

The invention discloses a centrifugal compressor inlet guide vane deflection angle measuring and adjusting device and method, and mainly solves the technical problems that an existing measuring method is difficult to measure and low in measuring precision and accuracy. The measuring device comprises a base and a measuring assembly. The A surface of the base is provided with a clamping groove for clamping the inlet guide vane, and the B surface is a plane, is used for installing the measuring assembly and is parallel to the vertical split surface of the inlet guide vane; the measuring assembly comprises a main graduated scale, an auxiliary graduated scale and a guide rod; one end of the main graduated scale is vertically mounted on the surface B, and the other end of the main graduated scale is suspended; the auxiliary graduated scale comprises a base and an auxiliary graduated disc, and the auxiliary graduated disc is fixedly mounted on the base; the auxiliary dial is provided with an arc-shaped groove matched with the main graduated scale, and the main graduated scale is clamped in the arc-shaped groove and movably connected with the auxiliary dial. The circle center of the main graduated scale and the circle center of the auxiliary graduated disc coincide and are located on the B surface; the guide rod is connected with the suspended end of the base close to the main graduated scale.

The utility model relates to the technical field of steel structure measurement, and discloses a super high-rise steel structure measuring device, which comprises an angle measuring ruler and two angle measuring rods, one ends of the two angle measuring rods are rotationally connected to the middle part of the angle measuring ruler; the bottom of the protractor is connected with a fixing rod, the fixing rod is slidably sleeved with an adjusting piece used for adjusting the angle between the two protractor rods, and the adjusting piece is provided with an elastic pressing piece abutting against the fixing rod. One end, far away from the protractor, of the fixed rod is provided with a rod type driving piece for adjusting the length of the fixed rod; a telescopic piece used for pushing the adjusting piece to slide on the fixing rod is installed on the adjusting piece. The utility model provides a super high-rise steel structure measuring device, which solves the problem that when an equivalent angle rod is in contact with a steel structure, the surface of the steel structure is uneven or misoperation occurs, and the angle measuring rod is easy to rotate, so that the measured angle is deviated.

The utility model discloses an adjustable measuring angle square, which relates to the technical field of measuring tools and comprises a fixed ruler and a rotary ruler rotationally mounted at one end of the fixed ruler. When the rotating ruler is rotated, a certain included angle area is formed between the rotating ruler and the fixed ruler, and the included angle area is a measuring area. The surface of the measuring area defined by the rotary ruler and the fixed ruler is a flat and straight surface; a dial is arranged around the rotating shaft of the rotating ruler on the fixed ruler; the rotating ruler is provided with scale indication marks corresponding to the dial. After the structure is adopted, when the ruler is stored, the rotary ruler is rotated to be flush with the fixed ruler, so that a linear structure is formed, and the ruler is convenient to store; during measurement, the included angle between the rotary ruler and the fixed ruler can be accurately read through the matching of the dial and the scale indication marks according to a required angle, and the measurement of a specific angle is realized.

The utility model relates to the technical field of aviation simulation, and provides a level gauge for an aircraft simulator. The transverse rolling mechanism comprises a first driving piece, a first gear transmission assembly, a first encoder and a transverse rolling dial, and the first encoder and the first driving piece are fixedly connected with the shell; the pitching mechanism comprises a pitching support, a second driving piece, a second gear transmission assembly, a second encoder and a pitching dial, the rolling dial, the second driving piece and the second encoder are fixedly connected with the pitching support, and the pitching dial is rotationally connected with the pitching support; the first driving part is connected with the pitching support and an input shaft of the first encoder through a first gear transmission assembly, and the second driving part is connected with the pitching dial and an input shaft of the second encoder through a second gear transmission assembly. The horizon surface reduces the cost of the aircraft simulator and improves the accuracy and stability of attitude display of the simulator.

The utility model relates to the technical field of geological exploration measuring tools, in particular to an inclination angle measuring device for geological exploration, which comprises a main body frame, one end of the main body frame is connected with an adjusting structure in a sliding manner, and the adjusting structure comprises an adjusting frame body and a positioning part which is in threaded connection with the adjusting frame body; a plurality of positioning holes are formed in the adjusting frame body, and the positioning parts selectively penetrate through the positioning holes and penetrate into the ground; and the other end of the main body frame is rotationally connected with a measuring plate and a protractor. Through the matching design of the adjusting frame body and the positioning part, the positioning part penetrates into the ground inside and outside the main body frame, so that the device can be better fixed with the ground, and the stability in the measurement process is improved. And the adjusting frame body is designed in a sliding connection mode, so that the position and height of the device can be quickly adjusted. Meanwhile, due to the storage design of the positioning part, the device is more compact in a non-measurement state and is convenient to carry.

The utility model discloses a civil engineering main body structure detection device, and relates to the technical field of civil engineering. The device comprises a shell, a measuring assembly and a portable assembly, a sliding shell is arranged in an inner cavity of the shell, a detection plate is fixedly connected to the bottom of the left side of the shell, the measuring assembly comprises a laser range finder, and the right side of the laser range finder is fixedly connected with the sliding shell. According to the utility model, through the measuring assembly, various measuring tools can be integrated, the number of tools carried by a worker is reduced, the laser range finder is used for detecting the length of a wall body, and the height of a parapet wall and a part of bearing walls can be measured conveniently; the angle measuring plate can be matched with the measuring plate to detect angles of a building slope surface and a roof slope surface, the gradienter can measure levelness of planes such as a wall surface and the ground, and due to the fact that various measuring tools are integrated, workers can reduce the number of carried measuring tools.

The utility model relates to the technical field of measuring devices, and discloses a foldable measuring device for building design, which comprises a first ruler strip and a second ruler strip which are rotatably connected, the lower part of the front end of the first ruler strip and the upper part of the front end of the second ruler strip are both provided with scale marks, the upper part of the rear end of the first ruler strip is provided with a first groove, and a second groove is formed in the rear end of the second ruler strip. The lower portion of the front end of the second ruler strip is provided with a second groove which is the same as the first groove in size, the upper portion of the first ruler strip is provided with a sliding groove, the front end of the first ruler strip is detachably connected with a protractor, a sliding block of an inverted-T-shaped structure is arranged in the first groove in a sliding mode, and the front end of the sliding block penetrates through the sliding groove and then is connected to the protractor. The angle between the first ruler strip and the second ruler strip can be adjusted, and the protractor can be detachably installed on the first ruler strip to measure the upward angle through cooperation of the sliding block, the second lead screw and the second fastening knob. The device is simple in structure, convenient to use, easy to store and high in practicability.

The utility model belongs to the technical field of steel pipe straightness detection devices, and particularly relates to a seamless steel pipe straightness detection tool which comprises a base, a power button is arranged on the base, a supporting base is fixedly connected to the outer wall of the base, a pipe body is arranged on the supporting base, a sliding groove is formed in the base, a detection mechanism is arranged on the base, and the detection mechanism is connected with the power button. The detection mechanism comprises a motor, the motor is in driving connection with a lead screw, and the lead screw penetrates through the moving block and is in threaded connection with the moving block. According to the seamless steel pipe straightness testing fixture, the supporting rod is stably clamped through expansion of the rubber ring, compared with a traditional bolt fixing mode, the outer wall of the supporting rod is effectively protected against damage, the contact area between the supporting rod and the supporting rod is increased, and therefore the more stable and reliable fixing effect is provided. According to the design, the stability of the moving block in the measurement process is ensured, and the accuracy of straightness measurement is further improved.