1083 results about "Strength testing" patented technology

The application relates to the field of concrete testing, in particular to a concrete seamless floor strength testing device and an operating method thereof. The concrete seamless floor strength testing device comprises a mounting frame, a moving driving part one, a connecting table one and a dynamic rebound apparatus; the upper end of the mounting frame is provided with the moving driving part one; the driving end of the moving driving part one is provided with the connecting table one, and the moving driving part one controls the up-down movement of the connecting table one; three dynamic rebound apparatuses are arranged on the connecting table one; the device further comprises a moving driving part two, a connecting table two and a cylinder; the connecting table one is provided with the moving driving part two; the driving end of the moving driving part two is provided with the connecting table two; three cylinders are arranged on the connecting table two; three groups of concrete seamless floor strength data are collected by the three dynamic rebound apparatuses for parallel comparison, so that the error is reduced, and the test area of the dynamic rebound apparatus is protected by the cylinder.

The invention discloses a performance detection method and system for ultra-high performance concrete, particularly relates to the technical field of building material performance detection, and aims to solve the problem of strength test discreteness caused by neglecting of an aging effect after high-temperature maintenance in an existing detection method. The method comprises the following steps: recording a first time point when a test piece is cooled at room temperature and a second time point when a press machine is loaded, and generating a comprehensive aging factor in combination with double quantitative analysis of a fiber pull-out fragment proportion and a crack fractal dimension in a damage process image; matching a strength correction coefficient from a preset table according to the aging factor, and dynamically calibrating a first compressive strength test result; accurate association between the aging damage mechanism and the macroscopic strength is achieved, and the reliability evaluation precision of the ultra-high performance concrete in major engineering is remarkably improved.

The invention provides a dynamic strength test system and method for a soft rock biaxial Hopins compression bar, and the system comprises an axial impact loading unit which is used for generating an axial impact load; the confining pressure loading unit is used for applying radial confining pressure to the sample; the high-pressure fluid injection unit is used for injecting high-pressure fluid into the sample and simulating different internal water pressure and water saturation conditions; the data acquisition unit is used for recording impact load, confining pressure, internal water pressure and sample dynamic response data in real time; the control system is used for coordinately controlling the axial impact speed, the confining pressure and the internal water pressure value; by integrating the axial impact loading unit, the hydraulic servo confining pressure loading unit and the high-pressure fluid injection unit, a test platform capable of truly simulating a complex stress-seepage coupling environment where the deep soft rock is located is formed; therefore, the synchronous, independent and accurate control of axial dynamic load, constant or dynamic confining pressure and internal pore water pressure is realized.

The invention relates to a four-degree-of-freedom icing adhesion strength testing device and a testing method. The testing device comprises a fixed platform, and a refrigerating and freezing module and a four-degree-of-freedom motion testing module which are arranged on the fixed platform. The fixed platform comprises a flat plate and a height-adjustable telescopic rod. The refrigerating and freezing module comprises a refrigerating platform, a refrigerating plate inclination angle assembly and at least one ice making mold. The four-degree-of-freedom motion test module comprises a Z-axis moving sliding table, a Y-axis rotating inclination angle assembly, an X-axis moving sliding table, a Y-axis moving sliding table, a pull and push dynamometer clamp and a pull and push dynamometer; the pull and push dynamometer can drive ice blocks in the ice making mold to be separated from a test sample under the driving of the Z-axis moving sliding table, the Y-axis rotating dip angle assembly, the X-axis moving sliding table and the Y-axis moving sliding table. Compared with the prior art, the device has the advantages of high experiment efficiency, wide measurement range, adjustable experiment parameters, diversified measurement modes and the like.

The invention relates to the technical field of frame strength testing, in particular to an electric bicycle frame strength testing device which comprises two sets of driving teeth, the upper ends of one set of driving teeth are fixedly connected with a driving source through a rotating shaft, the surfaces of the driving teeth are in meshed connection with matching teeth, and the lower ends of the matching teeth are fixedly connected with a rotating cylinder. A plurality of sets of force application grooves are formed in the inner wall of the rotating cylinder at equal intervals, a lifting cylinder is arranged in the force application grooves, two sets of symmetrically-arranged vertical rods are elastically inserted into the lifting cylinder, the lower ends of the vertical rods are rotationally connected with detachable contact pieces, and two sets of telescopic heads are symmetrically inserted into the lifting cylinder; and a magnetic suction rod is inserted into the telescopic head. According to the invention, through cooperative use of all parts, multi-directional force application detection can be carried out on the electric bicycle frame, a bumping phenomenon can be simulated in a force application detection process, all-directional detection is realized, the accuracy of a detection result is ensured, and the detection efficiency is improved.

The invention discloses a storage battery electrode plate strength test system, and relates to the field of electrode plate strength test.The storage battery electrode plate strength test system comprises a multi-angle tool device and an array type impact test device.The multi-angle tool device comprises a base, a first tool platform, a second tool platform and a tool side plate, the first tool platform is rotationally installed on the base, and the second tool platform is rotationally installed on the tool side plate; the second tool platform is rotationally installed on the first tool platform, the rotation axis of the first tool platform is perpendicular to the rotation axis of the second tool platform on the horizontal plane, the array type impact testing device comprises an impact bottom plate, a lifting driving plate and impact rods, the impact rods are arranged on the impact bottom plate in a sliding and penetrating mode, and the impact rods are arranged in a rectangular array mode. The lifting driving plate is arranged above the impact bottom plate, a plurality of driving columns are arranged on the lifting driving plate in a rectangular array mode, each driving column is provided with an impact rod, the driving columns are detachably connected with the impact rods, simulation is conducted by accurately adjusting the tool angle, and it is ensured that a test scene is highly matched with the actual working condition.

To provide an adhesive strength testing device capable of testing a tensile adhesive strength in the thickness direction of an expansive adhesive with higher accuracy than before.SOLUTION: Provided is an adhesive strength testing device for testing a tensile adhesive strength of an expandable adhesive with respect to a predetermined material, the testing device including: a pair of test pieces made of the material; a spacer; a holding member that presses the test pieces facing each other via the spacer and holds the test pieces such that a space is formed between facing surfaces of the test pieces; and a tensile member that has a first attachment portion attached to a tensile force generator that generates a tensile force and a second attachment portion attached to each of the test pieces from which the holding structure has been removed, the facing surfaces being bonded to each other by the expandable adhesive disposed in the space, and that transmits the tensile force generated by the tensile force generator to each of the test pieces to pull the test pieces in a direction in which the facing surfaces are separated from each other.SELECTED DRAWING: Figure 8

This invention discloses a tensile strength testing device for leather production, belonging to the field of tensile testing technology. The device includes a testing platform with a base plate fixedly mounted on it. A hollow column and a component box are fixedly mounted on the base plate. A guide movement mechanism is installed inside the hollow column. The device also includes at least one pair of clamps. One side of the hollow column has a long groove and a short groove, and a support member is slidably installed in both the long and short grooves. The clamps are mounted on the support members. The support member in the long groove is mounted on the guide movement mechanism, and a tension spring is fixedly connected between the support member in the short groove and the bottom surface of the groove. Contact points and microswitches are respectively installed on the support member and the bottom surface of the short groove. The two clamps are synchronously stretched by the same guide movement mechanism. When either sample breaks, the microswitch of the broken sample is triggered, the fracture information is recorded, and tension continues to be applied to the other sample until it breaks.

The invention relates to the technical field of composite film strength detection, and discloses a composite film peel strength testing device which comprises a testing platform, two pulling sliding plates slidably mounted in the two extending parts respectively and capable of being synchronously and mutually close to or away from each other for adjustment, and the two pulling sliding plates are arranged on the testing platform. The opposite ends of the two pulling sliding plates are each provided with a clamp used for clamping a single-layer film of a composite film separation section. The clamping assembly is arranged in the test platform and is used for clamping and limiting the fitting section of the composite membrane and enabling the separation section and the fitting section of the composite membrane to form a Y-shaped state; and two groups of test assemblies. Through the Y-shaped constant-angle stripping design, the stripping surface of the composite film is uniquely locked, the stripping angle is kept unchanged in the whole testing process, and the effects that stripping cracks are stably limited to a specified unique interface, crack initiation is controllable and deviation is avoided are achieved.

The utility model discloses equipment for testing tensile strength of flocculus of a chemical fiber quilt, which relates to the technical field of textile and comprises a rack and a mounting frame, a testing component is horizontally and slidably mounted on the inner side of the mounting frame, and a driving component for driving the testing component to horizontally move back and forth is mounted on the mounting frame. The testing assembly comprises a mounting base, a friction wheel, a first limiting sliding sleeve, a second limiting sliding sleeve, a reciprocating lead screw and a testing pressure head. In the sliding process of the testing assembly, friction force between a friction wheel and a friction frame is utilized to enable the friction wheel to drive a reciprocating lead screw to rotate, so that a second limiting sliding sleeve drives a testing pressing head to reciprocate up and down under the limiting effect of a first limiting sliding sleeve, and in the downward moving process of the testing pressing head, flocculus of a chemical fiber quilt is locally pressed downwards; and along with the translation of the test assembly and the up-and-down reciprocating motion of the test pressure head, the tensile strength test can be performed on multiple positions of flocculus of the chemical fiber quilt, and the use is more convenient and faster.

The invention relates to the technical field of spring detection equipment, and discloses a tensile strength testing device for air spring production, the tensile strength testing device comprises a main body structure, a tensile structure is detachably mounted on the main body structure, and suspension structures are symmetrically arranged on the tensile structure. Detection accuracy, adaptation flexibility and operation safety are considered, high air leakage detection accuracy is achieved, different specification test requirements are met, personnel operation safety can be guaranteed, through a stretching structure, test scene suitability and data detection comprehensiveness are improved, multi-size and multi-type spring tests are adapted, and multi-working-condition mechanical data detection is achieved; through a suspension structure, adaptability and installation convenience of springs of different specifications are enhanced, installation tests of air springs and metal springs are compatible, and the comprehensive practical value of equipment is improved.

The application belongs to the technical field of lens testing, and provides a VR coated lens film strength testing machine, which comprises a base, a conveying belt is arranged in the base, a plurality of groups of placing plates are arranged on the conveying belt, the placing plates are connected with the conveying belt through telescopic rods, a placing groove is formed in the surface of the placing plates away from the conveying belt, a supporting plate is fixedly installed on the middle side wall in the base, the lower surface of the placing plate is flush with the upper surface of the supporting plate when the telescopic rods are in the shortest state, a fixing frame is fixedly installed in the middle of the base, and a first telescopic piece pointing to the base is fixedly installed on the fixing frame. Compared with the prior art, the application has the following beneficial effects: the placing plates can be fixed through the supporting plate and the pressing plate, the coated lenses on the placing plates are fixed through the fixing assembly, so that the coated lenses are always in a stable state during the testing process, and the detection accuracy of the strength of the coated lenses is improved.

The invention discloses a cone yarn quality on-line detection system, and relates to the technical field of cone yarn detection.The cone yarn quality on-line detection system comprises a box body and a detection assembly, the detection assembly is arranged in the middle of the box body and comprises a lower pressing wheel, the lower pressing wheel is arranged in the middle of the box body, and pressing springs are symmetrically connected to the two sides of a bearing frame of the lower pressing wheel; the other end of the pressure spring is connected with an adjusting plate, and the middle of one side of the adjusting plate is connected with an electromagnet. When the device is used, the strength of the whole yarn can be detected in the process of visual detection of the yarn, the yarn can be prevented from being broken in the strength detection process, the unqualified strength position can be marked for later treatment, batting and the like on the yarn can be removed in the detection process, and the detection efficiency is improved. The fluff is prevented from flying and adhering to the device, the yarn is dried, the situation that the cone yarn absorbs water vapor in the air when placed, and consequently strength detection is not accurate is avoided, and meanwhile marking pigment can be prevented from adhering to the device.

The invention provides a dynamic load-oriented brazed diamond bonding strength testing device and method. The dynamic load-oriented brazed diamond bonding strength testing device comprises a base, a test framework, a self-adaptive sample holding unit, a data acquisition unit and a visual auxiliary alignment unit, the self-adaptive sample holding unit realizes stable clamping and angle adjustment of a sample through a rotatable platform, a translation bottom table, a hydraulic clamping cylinder and an angle adjusting piece; the data acquisition unit acquires a shear force-displacement curve by using a fiber bragg grating sensor, and a high-speed camera records a fracture process; and the vision-assisted alignment unit (high-resolution industrial camera) is used for calibrating the positions of the sample and the pressure head. The method comprises the steps of intelligent pre-characterization clamping, variable load dynamic shear testing, in-situ fracture mode judgment, multi-mode effective fracture area measurement and multi-dimensional strength characterization. According to the invention, the sample positioning and clamping stability is improved, the loading interference is reduced, the interface bonding strength is quantitatively and reliably represented under the dynamic load, and the test accuracy and repeatability are guaranteed.

The utility model provides a sensor lead tensile strength testing device, and relates to the field of tensile strength testing, the sensor lead tensile strength testing device comprises a mounting table, the top end of the mounting table is provided with a pulling assembly, the top end of the pulling assembly is provided with a testing assembly, the testing assembly is used for testing the tensile force borne by a lead, one side of the pulling assembly is provided with a bending assembly, and the bending assembly is used for bending the lead. A mounting assembly is arranged at the bottom end of the mounting table, an adjusting assembly is arranged in the mounting assembly, a fastening assembly is arranged on one side of the bending assembly, the fastening assembly is used for clamping one end of the lead, and the pulling assembly is matched with the testing assembly to pull the other end of the lead. According to the invention, the bending assembly and the installation assembly are arranged, so that a user can use the bending assembly according to requirements, abut against the middle part of the sensor and bend the sensor before testing, and then carry out testing, thereby simulating the tensile strength of the lead under the condition of composite stress, and improving the flexibility and practicability of testing.

The invention discloses a rotary speed reducer gear tooth root strength test device which comprises a test bed, a mounting mechanism, a rotating mechanism, a limiting mechanism, a strength test mechanism and an observation mechanism. A mounting mechanism is arranged in the center of the test bench to fix a to-be-tested gear and can adapt to replacement of gears of different specifications; the mounting mechanism is connected with a rotating mechanism under the test bench, and a rotating motor is provided with an encoder to realize accurate rotation angle switching of a gear; limiting mechanisms are arranged on the left and right sides of the mounting mechanism and can move in the radial direction to be engaged with the gears for limiting or separated for avoiding. Strength test mechanisms are arranged in front and back, can be adjusted in the radial direction, can be meshed with a single tooth to apply force, and can be fed back by a force sensor to switch postures by rotating an oil cylinder and an air cylinder; an observation mechanism on the strength test mechanism is used for detecting tooth root cracks by using an endoscope and marking the tooth root cracks through a spray head. The device does not need repeated positioning, can continuously detect each tooth root, improves the efficiency and precision, is adaptive to gears of various specifications, and meets the industrial detection requirements.

The invention discloses a full-automatic measurement and strength testing method and system for a concrete core sample, and the method comprises the steps: obtaining an end face image and a cylindrical surface image of the concrete core sample, and extracting the boundary contour of the images; according to the boundary point set of the core sample image, identifying core sample end face deformation abnormity and cylindrical surface deformation abnormity; constructing a core sample end face defect identification model, and identifying core sample end face defect types and defect severity; extracting texture features, color features and geometric features of the core sample, and constructing a joint feature matrix; constructing a core sample cylindrical surface defect identification model, and identifying the defect type of the core sample cylindrical surface; performing core sample discarding, finishing and inspection flow distribution according to the deformation and defect identification information of the end surface and the cylindrical surface of the core sample; and determining the compressive strength of the concrete core sample by using an automatic centering and servo loading device. According to the invention, the integrated full-process unmanned closed-loop operation of size detection and strength test is realized, and the requirements of efficiency, consistency and traceability of mass engineering core sample detection are met.

The invention belongs to the technical field of aluminum alloy tensile strength detection, and particularly relates to an aluminum alloy strip strength tensile detection device and method.The device comprises a detection machine table and guide rail slideways, and further comprises a middle cross beam and two clamps which are arranged between the two guide rail slideways; one clamp is connected with a sensor for monitoring the load of the sample; the ball screw and the driving mechanism are used for moving the middle cross beam, and the two ends of the middle cross beam are transversely and sequentially connected with disposable cushion blocks, suspension joint forks and centralizing pieces; the detection method comprises the following steps of: initializing the device: moving the two clamps away to open a gap which is used for placing a sample, connecting the sensor to an external controller, and initializing parameters of the sensor; the vertical sample clamping device brings better convenience to small-batch testing work of aluminum alloy strips in a laboratory, the samples are straightened in the detection process, the samples are disconnected in the middle after being loaded, and emergency unloading is carried out when overlarge loads are borne.

The invention discloses a tunnel unfavorable geologic body catastrophe identification method based on an alteration geological evolution sequence, and relates to the technical field of tunnel disaster prevention and reduction, and the method comprises the steps: carrying out the comprehensive advanced geological forecast of an unexcavated section of an excavated tunnel where an unfavorable alteration geologic body is found until a geophysical prospecting abnormal region is found; recording measuring points are arranged in the tunneling direction of the side wall of the excavated section of the tunnel, the three-dimensional coordinates of the measuring points and the tunnel mileage are positioned, and recording data are recorded; carrying out structural plane plotting, rock strength test, underground water state measurement and mineralogy test at the catalog measuring point to obtain in-situ test data; enabling the catalog data to correspond to the in-situ test data according to the tunnel mileage, extracting an undesirable alteration quantitative index, and drawing an alteration evolution sequence diagram; and constructing a bad alteration identification criterion, and if the identification criterion is met, performing trend extrapolation on the bad alteration quantitative index, and constructing a catastrophe evaluation system. According to the method, the engineering attributes and catastrophe of the poor alteration geologic body in front of the tunnel face can be effectively identified.

The utility model discloses a lightweight packaging carton strength detection device, which comprises a compression testing machine main body, an upper pressing plate and a lower pressing plate, the output end of the compression testing machine main body is fixedly connected with the upper pressing plate, and the lower pressing plate is placed at the bottom of the upper pressing plate. Through the cooperative use of the compression testing machine main body, the upper pressing plate, the lower pressing plate, the accommodating groove, the auxiliary assembly, a through groove, a sliding block, a limiting plate, a rack, a screw rod, a motor, a stabilizing groove, an isolation plate and anti-skid grains, the problems that the existing equipment is often lack of effective clamping measures; the problems that paper boxes with different sizes and shapes are difficult to stably and properly fix when the strength of the paper boxes is tested due to the fact that the paper boxes are difficult to fix, the paper boxes are prone to displacement or inclination in the testing process, the stress is uneven, the testing result is distorted, and the operation complexity is obviously increased are solved.

The utility model belongs to the technical field of testing, and particularly relates to a seed coating agent film layer strength testing machine which comprises a machine body, a machine table, two supporting columns, a top plate, a hydraulic cylinder, a connecting plate, a testing disc and a testing pressing head, the machine table is fixed to the top of the machine body, the bottoms of the two supporting columns are fixed to the two sides of the machine table, the top plate is connected with the supporting columns, and the hydraulic cylinder is connected with the testing disc. The hydraulic cylinder is fixed at the bottom of the top plate, the telescopic end of the hydraulic cylinder is connected with the connecting plate, the test pressure head is fixed at the bottom of the connecting plate, a plurality of electric push rods are mounted at the bottom of the test pressure head, the bottom of each electric push rod is connected with a test pressure plate, and a sensor is arranged at the bottom of each test pressure plate. According to the utility model, each seed coating agent on the supporting groove can be pressed and tested by the test pressure head, so that the test effect of the test machine on a seed coating agent film layer is improved, and the deviation of the strength test result of the seed coating agent caused by non-uniform stress of the seed coating agent due to the size difference of the seed coating agent is prevented.

The invention relates to the technical field of rock mechanics experiments, and discloses a high-temperature rock strength testing method for eliminating thermal stress interference through active temperature control, and the method comprises the following steps: determining a temperature control cooling rate threshold value for eliminating thermal stress accumulation based on a temperature field-stress field coupling model; the rock sample is controlled to be heated to a target temperature value, heat preservation is conducted for a preset time length, the constant-temperature box containing the rock sample subjected to heat preservation is subjected to temperature-controlled cooling to the room temperature at the target temperature-controlled cooling rate not higher than the temperature-controlled cooling rate threshold value, and therefore the internal temperature field of the rock sample is made to change evenly; and carrying out mechanical strength test on the rock sample subjected to temperature-controlled cooling to obtain a test rock strength parameter without thermal stress interference. According to the invention, thermal stress accumulation caused by natural cooling can be effectively avoided, the precision and reliability of high-temperature rock strength testing are remarkably improved, measurement errors caused by thermal stress interference are reduced, and the engineering requirements of deep ultrahigh-temperature stratum rock mechanical property research are met.

This application belongs to the field of plastic pipe performance testing technology, specifically relating to a plastic pipe strength testing device and method. The testing device includes a support base, a clamping mechanism, a guide tube, a velocity sensor, and a deformation detector. The support base has a support platform; the clamping mechanism is connected to the top surface of the support platform for positioning the plastic pipe; the guide tube is connected to the support base, vertically positioned above the plastic pipe held by the clamping mechanism, allowing falling rocks to impact the plastic pipe; the velocity sensor is connected to the support base and located at the exit of the guide tube to obtain the instantaneous velocity of the falling rock impacting the plastic pipe; the deformation detector is connected to the support base and located at the exit of the guide tube to detect the deformation of the plastic pipe when impacted by a falling rock. This application avoids the problem of large differences in test data from different testers in different testing scenarios, improving the accuracy of assessing the rock impact strength of plastic pipes.

The utility model belongs to the technical field of flat plate type catalyst abrasion strength testing, and discloses a flat plate type catalyst abrasion strength testing device which comprises a fan, the output end of the fan is connected with two sample bins through a connecting pipe, a flow meter is installed between the fan and the sample bins, a butt joint pipe is connected between the two sample bins, and the butt joint pipe is connected with the output end of the fan. According to the device disclosed by the utility model, the L-shaped supporting plate is shifted towards two sides by arranging the dismounting assembly structure, so that the L-shaped supporting plate rotates on the concave supporting rod through the sleeve, and the spring and the pressing plate are separated from the tops of the first catalyst sample and the second catalyst sample; the first catalyst sample and the second catalyst sample are unlimited on the sample bin, so that the flat plate type catalyst in the sample bin is quickly replaced, the disassembly and assembly efficiency of the flat plate type catalyst is improved, the flat plate type catalyst is convenient to use by operators, and the convenience of the device is improved.

The utility model discloses a female shoe heel strength testing device which comprises a table, a top plate is connected to the table through a support, a shoe mold is installed on the top plate through a lifting mechanism, a rotating plate on the table is connected with a rotating table, and a motor used for controlling the rotating table to rotate is installed on the lower side of the table. The shoe heel strength testing device comprises a rotary table, a test board is arranged on the rotary table, a sliding groove with an upward opening is formed in the test board, a mounting seat is connected in the sliding groove in a sliding mode, and a test board arranged in an inclined mode is installed on the mounting seat. The test environment is closer to the real use scene, the reliability of the test result is high, and the angle of the test board can be adjusted to establish different test conditions and test environments, so that the application range is wide; according to the utility model, the test board and the test board can rotate by 360 degrees, so that the heel can be tested at any angle.

The invention belongs to the technical field of detection devices, and particularly relates to an elevator landing door strength detection device, which comprises a support mechanism, an impact mechanism, a fixing mechanism and a test mechanism, and is characterized in that the impact mechanism performs self-adaptive strength impact on the surface of a door plate body according to test requirements during working; when the impact mechanism works, the fixing mechanism is automatically driven to work, the two sides of the door plate body are clamped and fixed, and meanwhile the clamping strength of the door plate body is adjusted in a self-adaptive mode according to the impact strength of the impact mechanism. When the fixing mechanism starts to work, the testing mechanism is automatically driven to work, the door plate body to be impacted is preprocessed, data of the maximum deformation quantity generated after the door plate body is impacted is marked in real time, the elevator landing door strength detection device replaces a traditional elevator landing door strength testing mode, and the detection efficiency is improved. The problem that the test accuracy is affected due to the fact that the deformation quantity in the impact test process is not accurate enough is solved.

A blower testing device, comprising a testing frame (1), a first testing table (2), spacer posts (3), fixtures (4), and airflow strength measurement modules (5), wherein the spacer posts (3) are fixedly arranged on the table top of the first testing table (2); each fixture (4) is arranged at one end of the corresponding spacer post (3), and the fixtures (4) are used for fixing a blower housing; the first testing table (2) and the airflow strength measurement modules (5) are arranged on the testing frame (1); the measurement direction of each airflow strength measurement module (5) is arranged opposite to the direction of an air blowing port of the blower housing; the airflow strength measurement modules (5) is configured to measure airflow strength when a blower is started. In this way, the airflow strength testing efficiency for the blower is improved. The blower testing device further measures the profile, flatness, and roundness of an impeller.

The utility model relates to an insulating strength testing device for a clean air current transformer, which belongs to the technical field of electrical equipment detection and comprises a high-voltage generator, a connecting flange, a communicating pipe, a detection component, a control module, a communication module and a power supply module for supplying power to the whole device. The high-voltage generator is connected to one end of the communicating pipe through the connecting flange, the detection assembly is fixed to the other end of the communicating pipe, the control module is arranged in the communicating pipe, and the end, away from the connecting flange, of the high-voltage generator penetrates through an end cover flange of the clean air current transformer and then extends out of the clean air current transformer. The high-pressure generator and the end cover flange are in sealed connection, and the connecting flange and the end cover flange are fixedly connected through a bolt and a nut; core components such as the high-voltage generator and the detection assembly are ingeniously arranged in the clean air current transformer, the size of the testing device is remarkably reduced, the occupied area is reduced, and therefore the construction cost of a transformer substation is reduced.

This invention discloses a composite testing device for the interface connection strength of a gas meter housing, relating to the field of gas meter manufacturing and testing technology. In existing technologies, after the gas meter housing is manufactured, it needs to be transferred to specific equipment for interface pull-out and torsion testing, both typically performed on separate equipment, resulting in low efficiency. The composite testing device provided by this invention is integrally mounted on the fixed pressure plate of a stamping and riveting equipment, comprising: a clamping structure including a clamping cylinder and a clamping linkage assembly, the clamping linkage assembly including a wedge-shaped push block and two clamping parts, the clamping parts having arc-shaped clamping portions for clamping and fixing the interface; a pull-out testing structure applying a straight load at the interface for pull-out strength testing; and a torsion testing structure applying a torsional load to the clamping structure for torsional strength testing. This invention enables direct strength testing after stamping and riveting, eliminating the step of disassembly and reinstallation, improving production testing efficiency, and reducing production costs.

The utility model relates to the technical field of building material detection, and provides a steel bar tensile strength tester, which comprises a tester assembly, a steel bar tensile strength tester, a steel bar tensile strength tester and a steel bar tensile strength tester, the tester assembly comprises a base and a tester body, and the tester body is fixedly connected to the upper end position of the base; the limiting assembly comprises sliding grooves, sliding blocks, first fixing shafts, first connecting rods, second fixing shafts, fixing blocks and limiting circular rings, the sliding grooves are formed in the two sides of the upper end of the base and the two sides of the bottom end of the tester body respectively, the sliding blocks are slidably connected to the inner portions of the sliding grooves, and the first fixing shafts are fixedly connected to the inner sides of the upper ends of the sliding blocks. The beneficial effects of the utility model are that the limiting assembly is arranged, the limiting circular ring is fixed at the position of the clamp, and the limiting circular ring is located at the outer side of the clamp, so that the two ends of the reinforcing steel bar respectively penetrate through the limiting circular ring to enter the clamp, the reinforcing steel bar can be kept in a vertical state to carry out tensile strength detection, and the detection accuracy is high.