CN114486526B - Measuring instrument for detecting bearing limit value of steel pipe and using method thereof - Google Patents
Measuring instrument for detecting bearing limit value of steel pipe and using method thereof Download PDFInfo
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 206
- 239000010959 steel Substances 0.000 title claims abstract description 206
- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000005484 gravity Effects 0.000 claims abstract description 50
- 238000012360 testing method Methods 0.000 claims abstract description 35
- 238000005452 bending Methods 0.000 claims abstract description 31
- 238000001514 detection method Methods 0.000 claims description 22
- 241000251131 Sphyrna Species 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
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- 238000002474 experimental method Methods 0.000 description 2
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- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
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- 230000000694 effects Effects 0.000 description 1
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- 239000012530 fluid Substances 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/20—Investigating strength properties of solid materials by application of mechanical stress by applying steady bending forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/30—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight
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Abstract
The application discloses a measuring instrument for detecting the bearing limit value of a steel pipe and a use method thereof, comprising the following steps: the device comprises a workbench and a display connected with the workbench, wherein the workbench comprises a test area and a component force area arranged on one side of the test area, the component force area is provided with a fixed ring, the component force area is provided with component force hammers, the size of each component force hammer head is different, the component force hammers are connected onto a component force plate, the test area is provided with a lifting plate, one surface of the lifting plate is provided with a gravity hammer, the gravity hammer is connected with a gravity regulator, the other surface of the lifting plate is provided with a fixed knob, the test area further comprises fixed points, the fixed points are arranged in the range of the test area in parallel, each fixed point is internally provided with a force measuring device, the force measuring device is connected with a display screen, the component force hammers on the component force area are used for carrying out primary pressure application on a steel pipe, the bending property of the steel pipe is detected, the steel pipe after the component force hammers are applied pressure is transmitted to the test area, the tensile strength of the steel pipe is detected, the steel pipe is obtained after the steel pipe is subjected to a certain bending moment force is detected, gravity pressure is applied on the steel pipe, and the limit pressure value of the steel pipe is calculated.
Description
Technical Field
The application relates to the field of building material quality inspection and load measurement, in particular to a measuring instrument for detecting the bearing limit value of a steel pipe and a using method thereof.
Background
Steel pipes are steel materials having a hollow cross section with a length that is much greater than the diameter or circumference. The steel pipes are divided into round, square, rectangular and special-shaped steel pipes according to the cross section shape; the materials are divided into carbon structural steel pipes, low alloy structural steel pipes, alloy steel pipes and composite steel pipes; the steel pipe is divided into steel pipes for conveying pipelines, engineering structures, thermal equipment, petrochemical industry, mechanical manufacturing, geological drilling, high-pressure equipment and the like according to the application; the production process is divided into a seamless steel pipe and a welded steel pipe, wherein the seamless steel pipe is divided into a hot rolling type and a cold rolling type (drawing type), and the welded steel pipe is divided into a straight seam welded steel pipe and a spiral seam welded steel pipe. The steel pipe is not only used for transporting fluid and powdery solids, exchanging heat energy, manufacturing mechanical parts and containers, but also an economical steel material. The steel pipe is used to manufacture the net frame, the support and the mechanical support of the building structure, which can reduce the weight, save the metal by 20-40 percent and realize the industrialized mechanized construction. The steel pipe is used to make highway bridge, so that it not only can save steel material and simplify construction, but also can greatly reduce the area of coating protection layer and save investment and maintenance cost.
The deformation resistance of the steel pipe is one of important performance indexes, and the steel pipe in a special scene should be subjected to deformation resistance detection before being installed and used, so that safe production is ensured, and the safety accidents caused by pipeline deformation are avoided. The steel pipe detection at the current stage mostly adopts point detection, and the mode has limited effect, and can not ensure that each section of the steel pipe can meet the use standard, so a device capable of detecting the pressure-bearing limitation of the steel pipe in different stress states and different bending states is needed.
Disclosure of Invention
The application overcomes the defects of the prior art and provides a measuring instrument for detecting the bearing limit value of a steel pipe and a using method thereof.
In order to achieve the above purpose, the application adopts the following technical scheme: a measuring instrument for detecting the bearing limit value of a steel pipe and a use method thereof comprise the following steps: the device comprises a workbench and a display connected with the workbench, and is characterized in that the workbench comprises a test area and a component force area arranged on one side of the test area, a fixed ring is arranged on the component force area, a plurality of component force hammers are arranged on the component force area, the hammer heads of the component force hammers are different in size, the component force hammers are connected to a component force plate, and a force application device is arranged on the component force plate;
the test area is provided with a lifting plate, one surface of the lifting plate is provided with a gravity hammer, the gravity hammer is connected with a gravity regulator, the gravity regulator is connected with the display, the other surface of the lifting plate is provided with a fixing knob, and the fixing knob can fix the steel pipe;
the test area further comprises fixed points, the fixed points are arranged in the range of the test area in parallel, a force measuring device is arranged in each fixed point, and the force measuring device is connected with the display screen.
In a preferred embodiment of the application, the test area is provided with a safety rod, the safety rod is formed by combining a plurality of sections of safety rods, a hydraulic pump is arranged in the workbench, one end of the safety rod is connected to the hydraulic pump, a safety hole is formed in the lifting plate, and the other end of the safety rod can pass through the safety hole.
In a preferred embodiment of the application, a locking nut is arranged on the lifting plate, the locking nut is connected to the lifting plate through a fixing piece, a magnetic cushion layer is arranged on the locking nut, and the magnetic cushion layer is arranged on the contact surface of the locking nut and the steel pipe to be tested.
In a preferred embodiment of the application, the lifting plate is arranged on a lifting rod, a chute is arranged on the lifting rod, a sliding block is arranged at the connecting end of the lifting plate and the lifting rod, and the sliding block can move in the chute.
In a preferred embodiment of the application, the component force hammers are sequentially arranged from the lifting plate to the workbench, and the size of the hammers is sequentially reduced from top to bottom.
In a preferred embodiment of the present application, the component force area and the detection area are connected by a conveyor belt, the conveyor belt includes a sliding groove and a roller, the fixing ring is fixed on the roller, and the roller can slide on the sliding groove.
In a preferred embodiment of the application, the fixing ring on the workbench is provided with a load sensor, and the load sensor is provided with a pressure receiving part, and the pressure receiving part coincides with the fixing position of the steel pipe.
In a preferred embodiment of the present application, the pressure receiving portion is provided with a strain gauge, the strain gauge is connected to the pressure receiving portion and the steel pipe at an angle, and the strain gauge is used for detecting tensile deformation of the steel pipe after being pressed.
In a preferred embodiment of the present application, a measuring instrument for detecting the bearing limit value of a steel pipe is used, and the method comprises the following steps:
s1, component force: fixing the steel pipe in a component force area fixing ring, and applying force to a component force hammer through a force application device, wherein the component force hammer strikes the steel pipe to enable the steel pipe to be sunken;
s2, force application: conveying the steel pipe with the dent to a detection area to be fixed on a fixed ring, applying force to the steel pipe through a lifting plate, and displaying the stressed size of the steel pipe by a force measuring device of a test area in the force application process;
s3, statistics: the force W applied by the component force hammer, the force Q applied by the gravity hammer and the bending degree S of the steel pipe are counted in a list.
In a preferred embodiment of the present application, the following situations are included in step S1:
case 1: the component force hammer is 5cm-20cm in diameter, and the applied force is 18MPa-25MPa;
case 2: the component force hammer does not impact the steel tube, and the steel tube directly enters the detection area from the component force area;
-case 3: the diameter of the component force hammer is 25cm-40cm, and the applied force is 25MPa-40MPa.
In a preferred embodiment of the present application, step S2 represents the following three cases in the case of step S1:
case 1: the output gravity of the gravity regulator is 25MPa-27MPa;
case 2: the output gravity of the gravity regulator is 22MPa-25MPa;
-case 3: the output gravity of the gravity regulator is 20MPa-22MPa.
In a preferred embodiment of the application, at least five steel pipes are required in the detection process, the stress of each steel pipe is different in detection, and the thickness, diameter and specification of the steel pipes are the same in the same detection process.
The application solves the defects existing in the background technology, and has the following beneficial effects:
(1) The steel pipe is subjected to primary pressure by the component force hammer on the component force area, the bending performance of the steel pipe is detected, the steel pipe subjected to pressure by the component force hammer is transmitted to the test area, the tensile strength of the steel pipe is obtained after the steel pipe is detected to be subjected to certain bending moment force, the steel pipe is subjected to gravity pressure, the maximum pressure value which the steel pipe can bear is calculated, and the steel pipe is used for later steel pipe repair or steel pipe quality detection, for example: when the steel pipe is impacted by the outside, the safety coefficient of the steel pipe is 2, the outer diameter of the steel pipe is 121mm, the wall thickness of the seamless steel pipe is 5mm, the bearable pressure (MPa)/the safety coefficient=the tensile strength (MPa) of the pipe x the wall thickness (m) of the pipe/the inner diameter (m) of the pipe can be obtained through a formula, and the bearable pressure of the pipe is 11.2613 MPa.
(2) The steel pipe bending degree detection device has the advantages that different bending moment forces are applied to the steel pipe through the component force hammers with different specifications on the component force area, so that the bending degree of the steel pipe is different due to the different bending moment forces, the maximum bearing force which can be accepted by the steel pipe under different bending degrees is detected, the range value of the bearing force which is met by the steel pipe under various different force conditions in the use state is checked, whether the steel pipe meets factory specifications is checked, compared with the steel pipe which is subjected to impact and stretching experiments only with single same force, the obtained steel pipe data is single and insufficient to explain the bearing range value of the steel pipe.
(3) When the steel pipe bending moment measuring device is used, a plurality of fixed points are arranged on a test area, a fixed ring is arranged on the fixed point, a force measuring device is arranged in the fixed ring, the force measuring device is a load sensor, the load sensor is connected with a steel pipe through a strain gauge, in the process of stressing the steel pipe, the load sensor can detect the gravity born by the steel pipe and also can detect the bending moment force and the torque force born by the steel pipe, and different numerical changes can occur to the load sensor under the influence of the bending moment force and the torque force, so that the bending moment force and the torque force born by the steel pipe when the steel pipe is impacted by gravity in different states can be obtained by adopting multi-group data acquisition, the deformation quantity of the tensile deformation of the steel pipe main body can be detected by installing the strain gauge between the load sensor and the steel pipe, and the ratio of the deformation curvature of the steel pipe and the gravity born by the steel pipe can be obtained, and the bending property of the steel pipe can be obtained, is detected whether the steel pipe is qualified or not, and the steel pipe is qualified or not, is detected.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art;
FIG. 1 is a perspective view of a preferred embodiment of the present application;
fig. 2 is a preferred embodiment of the present application.
In the figure: 1. a work table; 2. a display; 3. a test zone; 31. a lifting plate; 310. a safety hole; 32. a gravity regulator; 33. a fixed point; 34. a safety lever; 35. a chute; 4. a force-distributing plate; 41. a component force hammer; 7. a sliding groove.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, but the present application may be practiced in other ways than those described herein, and therefore the scope of the present application is not limited to the specific embodiments disclosed below.
In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the scope of the present application. Furthermore, the terms "one end," "the other end," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "one end," another end, "etc. may explicitly or implicitly include one or more of such features. In the description of the application, unless otherwise indicated, the meaning of "a number" is two or more.
In the description of the present application, it should be noted that, unless explicitly stated and limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art in a specific case.
As shown in fig. 1, a measuring instrument for detecting a bearing limit value of a steel pipe 6 includes: the steel pipe 6 to be tested is fixed by the aid of the fixing rings, the steel pipe 6 to be tested is prevented from inclining in the stressing process, the component force area is provided with a plurality of component force hammers 41, the hammerheads of the component force hammers 41 are different in size, different bending moment forces are provided for the steel pipe 6, bending degrees of the steel pipe 6 are different, the component force hammers 41 are connected to the component force plates 4, the component force plates 4 are provided with force applying devices, and the component force plates 4 apply force to the steel pipe 6.
The component force hammers 41 are sequentially distributed from the lifting plate 31 to the workbench 1, the sizes of hammers are sequentially reduced from top to bottom, different bending moment forces are applied to the steel pipes 6 through the component force hammers 41 with different specifications on the component force area, so that the bending degree of the steel pipes 6 is different due to the different bending moment forces, the maximum bearing force acceptable by the steel pipes 6 under different bending degrees is detected, the range value of the bearing force of the steel pipes 6 under various different force conditions in a use state is checked, whether the steel pipes 6 conform to factory specifications or not is checked, compared with the steel pipes 6 subjected to impact and stretching experiments only with single same force, the obtained steel pipes 6 are single in data and are insufficient in explaining the bearing range value of the steel pipes 6.
The test area 3 is provided with a lifting plate 31, one surface of the lifting plate 31 is provided with a gravity hammer 32, the gravity hammer 32 is connected with a gravity regulator, the gravity regulator is connected with the display 2 through a transmission line 21, the force application weight is regulated through a button on the display 2, the data are recorded, the other surface of the lifting plate 31 is provided with a fixing knob, and the fixing knob can fix the steel pipe 6, so that the steel pipe 6 cannot deviate when being applied with the force by the gravity hammer 32, and the steel pipe slides out of the test area 3.
The steel tube 6 is subjected to primary pressure by the component force hammer 41 on the component force area, the bending performance of the steel tube 6 is detected, the steel tube 6 subjected to pressure by the component force hammer 41 is transmitted to the test area 3, the tensile strength of the steel tube 6 is obtained after the steel tube 6 is subjected to certain bending moment force is detected, the steel tube 6 is subjected to gravity pressure, and the maximum pressure value which the steel tube 6 can bear is calculated, so that the steel tube 6 is used for repairing the steel tube 6 in the later stage or detecting whether the steel tube 6 meets the quality, for example: when the steel pipe 6 is impacted by the outside, the safety coefficient of the steel pipe 6 is 2, the outer diameter of the steel pipe 6 is 121mm, the wall thickness of the seamless steel pipe 6 is 5mm, the bearable pressure (MPa) of the pipe/the safety coefficient=the tensile strength (MPa) of the pipe x the wall thickness (m) of the pipe/the inner diameter (m) of the pipe are 11.2613MPa, and when the steel pipe 6 in a building is impacted, the dangerous value of the steel pipe 6 can be measured according to the bearable maximum pressure range of the steel pipe 6, so that the steel pipe 6 can be repaired or replaced selectively.
The test area 3 further comprises fixed points 33, the fixed points 33 are arranged in the range of the test area 3 in parallel, force measuring devices are arranged in each fixed point 33, the force measuring devices are connected with a display screen, the fixed points 33 are in gear combination, when the steel pipe 6 is stressed, the stress condition of the pipe wall of the steel pipe 6 is transmitted to the fixed points 33, a plurality of fixed points 33 are arranged on the test area 3 in use, a fixed ring is arranged on the fixed points 33, the force measuring devices are arranged in the fixed ring, the force measuring devices are load sensors, the load sensors are connected with the steel pipe 6 through the strain gauges, in the stressing process of the steel pipe 6, the load sensors can detect the gravity applied to the steel pipe 6, and can also detect the bending moment force and the torque applied to the steel pipe 6, different numerical changes can occur to the load sensors under the influence of the bending moment force and the torque force, so that when the steel pipe 6 is stressed by gravity in different states by adopting multiple groups of data acquisition, the deformation quantity of the steel pipe 6 caused by stretching deformation of the main body of the steel pipe can be detected, and whether the bending moment force of the steel pipe 6 is qualified or not can be detected by the bending moment ratio of the bending moment of the steel pipe 6.
The test area 3 is provided with a safety rod 34, the safety rod 34 is formed by combining a plurality of sections of safety rods, a hydraulic pump is arranged in the workbench 1, one end of the safety rod 34 is connected to the hydraulic pump, after a steel pipe 6 enters a fixed point 33, the safety rod 34 is lifted by the hydraulic pump, the safety rod 34 is arranged on the opposite surface of a steel pipe 6, which is opposite to the steel pipe 6 when the steel pipe 6 is broken by gravity extrusion, the steel pipe 6 is broken in a broken area when the steel pipe 6 is broken by gravity extrusion, so that the steel pipe 6 is arranged in the opposite surface, the steel pipe 6 is more ensured to be displaced when the steel pipe 6 is broken, the steel pipe 6 is arranged in the position at the rear side of the center, a lifting plate 31 is placed, when the steel pipe 6 is forced, part of force is separated by the safety rod 34, so that data is inaccurate, the lifting plate 31 is provided with a safety hole 310, the other end of the safety rod 34 can pass through the safety hole 310, the safety rod 34 is not contacted with the lifting plate 31, the steel pipe 31 is prevented from being dispersed by the safety rod 34, so that the steel pipe 6 is broken at any time under the condition of being stressed, the pressure, the steel pipe 6 is broken, the safety rod 34 is fixed in the detection area when the steel pipe 6 is broken, the safety rod 6 is enabled to be broken, the safety rod 6 is less than the safety rod 6 is enabled to take up a small weight, the safety box or the safety box is more than the safety box, the safety box is ensured, and the safety box is more convenient and the safety box is occupied by the safety box.
The lifting plate 31 is provided with a locking nut, the locking nut is connected to the lifting plate 31 through a fixing piece, the locking nut is provided with a magnetic cushion layer, the magnetic cushion layer is arranged on the contact surface of the locking nut and the steel pipe 6 to be detected, the locking nut locks the outer ring surface of the steel pipe 6, the magnetic cushion layer is adsorbed on the whole outer ring, the steel pipe 6 is fixed to the lifting plate 31, the lifting plate 31 is arranged on the lifting rod 35, the lifting plate 31 can be lifted or lowered, the contact distance between the lifting plate 31 and the steel pipe 6 is adjusted, meanwhile, the steel pipe 6 is forced, the lifting rod 35 is provided with a sliding groove, the connecting end of the lifting plate 31 and the lifting rod 35 is provided with a sliding block, the sliding block can move in the sliding groove, the lifting condition of the lifting plate 31 is continuously changed through the vertical movement of the sliding block on the sliding groove, and therefore the steel pipe 6 is pressurized.
The component force area is connected with the detection area through a conveying belt, the conveying belt comprises a sliding groove 5 and a roller, a fixed ring is fixed on the roller, the roller can slide on the sliding groove 5, the fixed ring moves on the sliding groove 5 and conveys the steel pipe 6 from the component force area to the test area 3 for detection, a load sensor is arranged on the fixed ring of the workbench 1 and provided with a pressure receiving part, the pressure receiving part coincides with the fixed position of the steel pipe 6, and the load sensor detects the gravity of the steel pipe 6 and the self weight of the steel pipe 6. The pressure receiving part is provided with a strain gauge which is connected to the pressure receiving part and the steel pipe 6 in an angle, and the strain gauge is used for detecting the tensile deformation of the steel pipe 6 after being pressed.
As shown in fig. 2, a method for using the measuring instrument for detecting the bearing limit value of the steel pipe 6 comprises the following steps:
s1, component force: fixing the steel tube 6 in a component force area fixing ring, and applying force to a component force hammer 41 through a force application device, wherein the component force hammer 41 knocks the steel tube 6 to enable the steel tube 6 to be sunken;
s2, force application: the steel tube 6 with the dent is conveyed to a detection area and fixed on a fixed ring, the steel tube 6 is forced by a lifting plate 31, and a force measuring device of the test area 3 displays the force applied by the steel tube 6 in the forced process;
s3, statistics: the force W applied by the component force hammer 41, the force Q applied by the gravity hammer 32, and the bending degree S of the steel pipe 6 are tabulated.
Step S1 includes the following cases:
case 1: the component force hammer 41 has a diameter of 5cm-20cm and applies a force of 18MPa-25MPa;
case 2: the component force hammer 41 does not impact the steel tube 6, and the steel tube 6 directly enters the detection area from the component force area;
-case 3: the component force hammer 41 has a diameter of 25cm-40cm and applies a force of 25MPa-40MPa.
Step S2 presents the following three cases in the case of step S1:
case 1: the output gravity of the gravity regulator is 25MPa-27MPa;
case 2: the output gravity of the gravity regulator is 22MPa-25MPa;
-case 3: the output gravity of the gravity regulator is 20MPa-22MPa.
At least five steel pipes are needed in the detection process, the stress of each steel pipe is different in the detection process, and the thickness, the diameter and the specification of the steel pipes are the same in the same detection process.
For example, 6 seamless steel pipes with the outer diameter of 121cm, the wall thickness of 5cm and the safety factor of 2 are detected:
the steel pipe 1 can bear 11.2613MPa, when the steel pipe is subjected to external impact force and is sunken, and when the size of a sunken opening is 10cm, the steel pipe can be vertically broken under the gravity of 28 MPa.
The above-described preferred embodiments according to the present application are intended to suggest that, from the above description, various changes and modifications can be made by the person skilled in the art without departing from the scope of the technical idea of the present application. The technical scope of the present application is not limited to the description, but must be determined according to the scope of claims.
Claims (10)
1. A gauge for detecting a steel pipe bearing limit, comprising: a workbench and a display connected with the workbench, which is characterized in that,
the workbench comprises a test area and a component force area arranged on one side of the test area, a fixed ring is arranged on the component force area, a plurality of component force hammers are arranged on the component force area, the hammer heads of the component force hammers are different in size, the component force hammers are connected to a component force plate, and a force application device is arranged on the component force plate;
the test area is provided with a lifting plate, one surface of the lifting plate is provided with a gravity hammer, the gravity hammer is connected with a gravity regulator, the gravity regulator is connected with the display, the other surface of the lifting plate is provided with a fixing knob, and the fixing knob can fix the steel pipe;
the test area further comprises fixed points, the fixed points are arranged in the range of the test area in parallel, and each fixed point is internally provided with a force measuring device which is connected with the display.
2. The gauge for detecting a steel pipe bearing limit according to claim 1, wherein: the test area is provided with the safety lever, the safety lever is formed by combining a plurality of sections of safety rods, be provided with the hydraulic pump in the workstation, safety lever one end is connected on the hydraulic pump, be provided with the safety hole on the lifter plate, the safety lever other end can pass the safety hole.
3. The gauge for detecting a steel pipe bearing limit according to claim 1, wherein: the lifting plate is provided with a locking nut, the locking nut is connected to the lifting plate through a fixing piece, the locking nut is provided with a magnetic cushion layer, and the magnetic cushion layer is arranged on the contact surface of the locking nut and a steel pipe to be tested.
4. The gauge for detecting a steel pipe bearing limit according to claim 1, wherein: the lifting plate is arranged on the lifting rod, a sliding groove is formed in the lifting rod, a sliding block is arranged at the connecting end of the lifting plate and the lifting rod, and the sliding block can move in the sliding groove.
5. The gauge for detecting a steel pipe bearing limit according to claim 1, wherein: the component force hammers are sequentially distributed from the lifting plate to the workbench, and the size of the hammerhead is sequentially reduced from top to bottom.
6. The gauge for detecting a steel pipe bearing limit according to claim 1, wherein: the component force area is connected with the test area through a conveyor belt, the conveyor belt comprises a sliding groove and a roller, the fixed ring is fixed on the roller, and the roller can slide on the sliding groove.
7. A method of using a gauge for detecting steel pipe bearing limits according to any of claims 1-6, comprising the steps of:
s1, component force: fixing the steel pipe in a component force area fixing ring, and applying force to a component force hammer through a force application device, wherein the component force hammer strikes the steel pipe to enable the steel pipe to be sunken;
s2, force application: conveying the steel pipe with the dent to a test area to be fixed on a fixed ring, and applying force to the steel pipe through a lifting plate, wherein a force measuring device of the test area displays the force applied by the steel pipe in the force application process;
s3, statistics: the force W applied by the component force hammer, the force Q applied by the gravity hammer and the bending degree S of the steel pipe are counted in a list.
8. The method of using the measuring instrument for detecting the bearing limit value of the steel pipe according to claim 7, wherein: step S1 includes the following cases:
case 1: the component force hammer is 5cm-20cm in diameter, and the applied force is 18MPa-25MPa;
case 2: the component force hammer does not impact the steel tube, and the steel tube directly enters the test area from the component force area;
-case 3: the diameter of the component force hammer is 25cm-40cm, and the applied force is 25MPa-40MPa.
9. The method for using the measuring instrument for detecting the bearing limit value of the steel pipe according to claim 8, wherein: step S2 presents the following three cases in the case of step S1:
case 1: the output gravity of the gravity regulator is 25MPa-27MPa;
case 2: the output gravity of the gravity regulator is 22MPa-25MPa;
-case 3: the output gravity of the gravity regulator is 20MPa-22MPa.
10. The method of using the measuring instrument for detecting the bearing limit value of the steel pipe according to claim 7, wherein: at least five steel pipes are needed in the detection process, the stress of each steel pipe is different in the detection process, and the thickness, the diameter and the specification of the steel pipes are the same in the same detection process.
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Effective date of registration: 20240708 Address after: No. 118, Xinyuan Road, Kaiping District, Tangshan, Hebei 063000 Patentee after: TANGSHAN JINGHUA STEEL PIPE CO.,LTD. Country or region after: China Address before: No.28, national defense Road, Lunan District, Tangshan City, Hebei Province Patentee before: Tangshan comprehensive law enforcement bureau of market supervision Country or region before: China |