CN113865537B - Device and method for measuring equivalent wall thickness of steel pipe of assembled scaffold - Google Patents
Device and method for measuring equivalent wall thickness of steel pipe of assembled scaffold Download PDFInfo
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- CN113865537B CN113865537B CN202111440140.7A CN202111440140A CN113865537B CN 113865537 B CN113865537 B CN 113865537B CN 202111440140 A CN202111440140 A CN 202111440140A CN 113865537 B CN113865537 B CN 113865537B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
- G01B21/08—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness for measuring thickness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/0002—Arrangements for supporting, fixing or guiding the measuring instrument or the object to be measured
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Abstract
The invention discloses an assembly type scaffold steel pipe equivalent wall thickness measuring device, which belongs to the technical field of building construction measurement, and comprises a pressure applying mechanism, wherein the pressure applying mechanism comprises a pressure part, a displacement sensor, a data acquisition unit and a result output unit which are embedded in the pressure part, and a positioning mechanism, the positioning mechanism comprises connecting rods, the ends of the connecting rods are hinged with each other and are symmetrical, and plug connectors are hinged at the tail ends of the connecting rods, the center position of a steel pipe body can be accurately found out through the measuring device, the invention also discloses the assembly type scaffold steel pipe equivalent wall thickness measuring method, the center position of the steel pipe body is determined in the first step, pressure is applied to the center position of the steel pipe body in the second step and data is acquired, the wall thickness equivalent numerical value of the steel pipe body is calculated through the data in the third step, the method can effectively ensure the accuracy of data acquisition, thereby further ensuring the accuracy of the calculation of the equivalent wall thickness of the steel pipe.
Description
Technical Field
The invention belongs to the field of measurement of linear dimension, and particularly relates to an equivalent wall thickness measuring device and method for an assembled scaffold steel pipe.
Background
The equivalent wall thickness is a quality index for measuring the scaffold steel pipe, and the quality of the steel pipe is determined by the size of the equivalent wall thickness, because before the scaffold is assembled, the equivalent wall thickness of the steel pipe to be assembled needs to be detected so as to evaluate whether the steel pipe meets the assembling requirement of the scaffold.
In prior art, the wall thickness of steel pipe detects mainly that contact slide caliper rule manual measurement, measures the wall thickness of the different positions of steel pipe through contact slide caliper rule to calculate the equivalent wall thickness of steel pipe, this kind of detection mode complex operation needs to get the steel pipe wall thickness of different positions and measures the calculation, and the measuring result relies on people's naked eye to observe, and its rate of accuracy is lower, and the error is great, can not satisfy scaffold assembly steel pipe measuring standard.
To this end, chinese patent publication No. CN103759690A discloses a method for measuring the equivalent wall thickness of scaffold steel tube, which mainly comprises applying pressure to the center of the steel tube, measuring the pressure value and the deflection value of the steel tube, and calculating the equivalent wall thickness of the steel tube according to the calculation formula based on the outer diameter, length and elastic modulus of the steel tube, but the above method has the following defects in the using process:
because the applied pressure needs to be ensured to be positioned at the middle position of the steel pipe when the steel pipe is stressed, if the applied pressure is not positioned at the middle position of the steel pipe, the deflection value of the steel pipe is inevitably inaccurate, this results in inaccurate calculated equivalent wall thickness of the steel pipe, and in practice, the midpoint position of the steel pipe is achieved by measurement, however, because the center position of the steel pipe is determined by measurement in a construction site, the error of the measured steel pipe is larger due to manual operation in a measuring vehicle, and even the center position of the measured steel pipe is cheap due to carelessness and calculation errors, and the error can not be judged by naked eyes, therefore, the calculation result of the calculated equivalent wall thickness of the steel pipe is inaccurate, which brings inconvenience to the construction of people and the assembly of scaffolds, therefore, it is necessary to design a measuring device and a measuring method capable of accurately positioning the center of the steel pipe and ensuring the accuracy of the calculation result of the equivalent wall thickness.
Disclosure of Invention
This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.
In view of the problem that the center position of the steel pipe cannot be determined so that the calculation of the equivalent wall thickness of the steel pipe is not accurate in the device and the method for measuring the equivalent wall thickness of the steel pipe, the center position of the steel pipe is located through the locating mechanism, pressure is applied to the steel pipe after the locating, and the equivalent wall thickness of the steel pipe is calculated through the deflection, the length, the outer diameter and the elastic modulus of the steel pipe.
Therefore, one of the objects of the present invention is to provide an apparatus for measuring the equivalent wall thickness of a fabricated scaffold steel pipe.
In order to solve the above problems, the present invention adopts the following technical solutions.
An assembled scaffold steel pipe equivalent wall thickness measuring device measures the equivalent wall thickness of a steel pipe body, and comprises a pressure applying mechanism, wherein the pressure applying mechanism comprises a pressure part, a displacement sensor, a data acquisition unit and a result output unit which are embedded in the pressure part,
still include positioning mechanism, positioning mechanism include the connecting rod of tip articulated each other and symmetry, the end of connecting rod articulates there is the plug connector, the plug connector is pegged graft respectively in steel pipe body both ends, the length of connecting rod equals.
Preferably, the plug connector is sleeved with a sliding sleeve, the tail end of the connecting rod is hinged to the sliding sleeve, and after the plug connector is plugged into the steel pipe body, the sliding sleeve needs to abut against the end wall of the steel pipe body.
Preferably, the plug connector constitute by screw portion and filling portion, the plug connector in filling portion peg graft and enter into this internally of steel pipe, screw portion go up the cover and be equipped with the push disk, push disk with screw portion screw thread assembly.
Preferably, the plug connector be tubular structure, set up the open slot on the lateral wall of plug connector, the open slot prolongs the one end of plug connector, is provided with supporting mechanism in the inside of plug connector, supporting mechanism is used for adjusting the opening and shutting size of the open slot of plug connector.
Preferably, the supporting mechanism comprises a rotating cylinder and a screw rod, the rotating cylinder is of a hollow structure with two open ends, internal threads are distributed on the inner wall of the rotating cylinder, the screw rods are assembled on the threads at the two ends of the rotating cylinder, the tail end of the screw rod is connected with a gasket, and the gasket abuts against the inner wall of the plug connector.
The invention also aims to provide a method for measuring the equivalent wall thickness of the steel pipe of the fabricated scaffold, which applies pressure to the center of the steel pipe body by the method, measures the pressure value and the deflection of the steel pipe body, and calculates the equivalent wall thickness of the steel pipe body according to the length, the outer diameter and the elastic modulus of steel, and comprises the following specific steps:
the first step is as follows: determining the center position of a steel pipe body, assembling positioning mechanisms at two ends of the steel pipe body, defining a hinge point of a connecting rod as a point A, overturning the positioning mechanism by using the central axis of the steel pipe body, wherein the hinge point of the connecting rod in the overturned positioning mechanism is a point B, a connecting line between the point A and the point B is superposed with the steel pipe body to form a line C, and the position of the line C on the steel pipe body is the center position of the steel pipe body;
the second step is that: the center position of the steel pipe body, namely the C line position, is pressed through a pressing mechanism, the magnitude of force F borne by the steel pipe body and the deflection delta of the steel pipe body are detected through a displacement sensor, a data collector and a result output unit, the length l of the steel pipe body and the outer diameter D of the steel pipe body are measured, and the steel elastic modulus E of the steel pipe body is obtained through looking up;
and thirdly, calculating the equivalent wall thickness through an equivalent wall thickness calculation formula of the steel pipe body.
Preferably, the equivalent wall thickness calculation formula is as follows:
in the formula: l is the length of the steel pipe body;
f is the pressure applied to the steel pipe body by the pressure applying mechanism;
delta is the deflection of the steel pipe body after being stressed;
d is the outer diameter of the steel pipe body;
d is the equivalent wall thickness of the steel pipe body.
Preferably, in the first step, the plug connector constitute by screw portion and filling portion, the plug connector in filling portion peg graft and enter into this internally, screw portion go up the cover and be equipped with the thrust disk, the thrust disk with screw portion screw thread assembly, the plug connector with positioning mechanism assemble the both ends of steel pipe body, the assembly mode as follows:
the plug connector is inserted and enters into the steel pipe body, the pushing disc is rotated, the pushing disc moves along the length direction of the plug connector, and the pushing disc pushes the sliding sleeve to abut against the end portion of the steel pipe body.
Preferably, in the first step, the plug connector be tubular structure, seted up the open slot on the lateral wall of plug connector, the open slot prolongs the one end of plug connector, is provided with supporting mechanism in the inside of plug connector, supporting mechanism is used for adjusting opening and shutting of the open slot of plug connector size, the plug connector with positioning mechanism assemble the both ends of steel pipe body, the assembly mode as follows:
the plug connector is inserted into the steel pipe body, the sliding sleeve is pushed to the end wall of the steel pipe body, and the supporting mechanism pushes the plug connector to be opened to limit and fix the sliding sleeve through adjustment.
Preferably, the specific adjustment of the support mechanism is as follows: the rotating cylinder rotates to drive the screw rod to screw out, the screw rod drives the gasket to jack up the plug connector, and the open slot in the plug connector is opened.
Advantageous effects
Compared with the prior art, the invention has the beneficial effects that:
(1) the measuring device comprises a positioning mechanism, wherein the positioning mechanism determines a vertical bisector of the steel pipe body by utilizing the isosceles triangle principle, so that the center position of the steel pipe body can be accurately determined, and the accuracy of acquired data is guaranteed on one hand, and the accuracy of the calculated equivalent wall thickness value of the steel pipe body is also guaranteed on the other hand when the pressing mechanism presses the steel pipe body.
(2) According to the measuring device, the positioning mechanism is positioned in a plug connector mode, and the plug connector can effectively ensure that the sliding sleeve abuts against the end wall of the steel pipe body when the positioning mechanism positions the center position of the steel pipe body, so that the accuracy of positioning the center position of the steel pipe body is effectively ensured, and the calculation accuracy of the equivalent wall thickness of the steel pipe is further ensured.
(3) The invention also provides a measuring method of the measuring device, which comprises the steps of firstly determining the middle position of the steel pipe body, secondly applying pressure to the middle position of the steel pipe body, and then calculating the equivalent wall thickness value of the steel pipe body through numerical values.
Drawings
FIG. 1 is a schematic structural view of a steel pipe body in a centered position according to the present invention;
FIG. 2 is a schematic structural diagram of an embodiment of the connector of the positioning mechanism of the present invention;
FIG. 3 is a schematic structural view of another embodiment of the connector of the positioning mechanism of the present invention;
FIG. 4 is a side view of the plug of FIG. 3 of the present invention;
FIG. 5 is a diagram illustrating the effect of the connector of FIG. 3 after plugging;
FIG. 6 is a schematic structural view of the inner support mechanism of the connector of FIG. 3 after plugging;
FIG. 7 is a view showing the state of the steel pipe body in the present invention when pressure is applied.
The corresponding relationship between the reference numbers of the figures and the names of the components in the figures is as follows:
10. a steel pipe body;
20. a positioning mechanism; 21. a connecting rod; 22. a plug-in unit; 23. a sliding sleeve; 24. pushing the disc; 25. a support mechanism;
221. a threaded portion; 222. a filling section; 223. an open slot;
251. a rotating cylinder; 252. a screw rod; 253. a liner;
30. and a pressing mechanism.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
Furthermore, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
The measuring device of the assembled scaffold steel tube equivalent wall thickness in the embodiment comprises a pressing mechanism 30 at the center of a steel tube body 10 and a positioning mechanism 20 for positioning the steel tube body 10 to determine the center position before pressing the steel tube body 10 as shown in fig. 7, the measuring device in the embodiment presses the steel tube body 10 through the pressing mechanism 30, the pressing mechanism 30 comprises a pressure part, and a displacement sensor, a data collector and a result output unit which are embedded in the pressure part, the displacement sensor, the data collector and the result output unit in the embodiment are in real-time data transmission with an outside control system, the control system controls the pressure part to apply pressure to the steel tube body 10 and controls the pressure, the displacement sensor is used for detecting the deflection generated after the steel tube body 10 receives the pressure, and the data collector collects and stores the pressure value and the deflection value in real time, and the structure and the working mode are common knowledge in the art and are not described in detail in the present application, and reference may be made to a scaffold steel tube equivalent wall thickness measuring device and a measuring method thereof disclosed in publication No. CN 103759690A. In the present embodiment, when the pressure member applies pressure to the steel pipe body 10, it is necessary to apply pressure to the center position of the steel pipe body 10, and therefore, ensuring the accuracy of the center position of the steel pipe body 10 is a necessary condition for ensuring the accuracy of the calculation result of the equivalent wall thickness of the steel pipe body 10. Therefore, as shown in fig. 1, in the present embodiment, the center position of the steel pipe body 10 is precisely located by the locating mechanism 20, the locating mechanism 20 in the present embodiment includes two connecting rods 21 with end portions hinged to each other, the end portions of the two connecting rods 21 are hinged to each other, the end portions of the connecting rods 21 in the present embodiment are hinged to plug-in units 22, the plug-in units 22 are respectively plugged into the two ends of the steel pipe body 10, a sliding sleeve 23 is sleeved on the plug-in units 22, and the end portions of the connecting rods 21 are hinged to the sliding sleeve 23, in the present embodiment, the length of the connecting rods 21 is equal, when the center position of the steel pipe body 10 is located, the plug-in units 22 are first plugged into the steel pipe body 10, because the length of 2 connecting rods is equal, an isosceles triangle structure is formed between 2 connecting rods 21 and the steel pipe body 10, the connection position of 2 connecting rods 21 is point a, and the position of the intersection point of the perpendicular line of the steel pipe body 10 and the steel pipe body 10 is the center position of the steel pipe body 10.
When the perpendicular line cannot be drawn through the point a in the construction environment, in this embodiment, the point a is determined first, then the positioning mechanism 20 is turned over with the central axis of the steel pipe body 10, the effect after turning is shown by the dotted line in fig. 1, the connecting position of the 2 connecting rods 21 is the point B, the point a and the point B are connected, the connecting line between a and B and the repeated part of the steel pipe body 10 form a line C, the line C is located in the center of the steel pipe body 10, and when the pressing mechanism 30 applies pressure to the steel pipe body 10, pressure is applied to the line C. By the method, the center position of the steel pipe body 10 can be accurately positioned, and the accuracy of the calculated equivalent wall thickness of the steel pipe is guaranteed.
In this embodiment, since the lengths of the 2 connecting rods 21 are equal, an isosceles triangle is formed between the connecting rod 21 and the steel pipe body 10, and therefore the connecting line between a and B forms a perpendicular bisector of the steel pipe body 10, a line C formed by the overlapping portion of the connecting line between a and B and the steel pipe body 10 is located in the middle of the steel pipe body 10, and the accuracy of the equivalent wall thickness value calculated by the steel pipe body 10 after pressure is applied in the later stage is ensured.
In this embodiment, the sliding sleeve 23 can move along the length direction of the plug 22, and in order to ensure that the positioning mechanism 20 is positioned at the center of the steel pipe body 10 accurately, in this embodiment, after the plug 22 is inserted into the steel pipe body 10, the sliding sleeve 23 needs to abut against the end wall of the steel pipe body 10.
As shown in fig. 2, which is a schematic structural diagram of the plug 22 according to an embodiment of the present embodiment, the plug 22 according to the present embodiment ensures that after the plug 22 is inserted into the steel pipe body 10, the sliding sleeve 23 abuts against the side wall of the steel pipe body 10, the plug 22 according to the present embodiment is composed of a threaded portion 221 and a filling portion 222, the sliding sleeve 23 can slide on the threaded portion 221 and the filling portion 222, the filling portion 222 of the plug 22 is inserted into the steel pipe body 10, the threaded portion 221 is sleeved with a push plate 24, the push plate 24 is threadedly assembled with the threaded portion 221, in the present embodiment, after the filling portion 222 of the plug 22 is inserted into the steel pipe body 10, the push plate 24 is rotated to move the push plate 24 on the threaded portion 221 along the length direction of the plug 22, and therefore, the push plate 24 pushes the sliding sleeve 23 to move along the length direction of the plug 22 until the sliding sleeve 23 abuts against the end of the steel pipe body 10 On the wall. Because the pushing disc 24 is assembled with the thread part 221 through threads, after the sliding sleeve 23 abuts against the end wall of the steel pipe body 10, the meshing action between the pushing disc 24 and the thread part 221 plays a good limiting role, the sliding sleeve 23 is prevented from reversely sliding, and the sliding sleeve 23 is ensured to be always in an abutting state with the end wall of the steel pipe body 10.
As shown in fig. 3, 4 and 5, which are schematic structural diagrams of the plug 22 according to another embodiment of the present embodiment, the plug 22 in the present embodiment is a cylindrical structure, the sliding sleeve 23 is sleeved on the plug 22 and can slide along a length direction of the plug 22, an open slot 223 is formed on a side wall of the plug 22 in the present embodiment, the open slot 223 extends to one end of the plug 22, in the present embodiment, a supporting mechanism 25 is disposed inside the plug 22, and the supporting mechanism 25 is disposed to adjust an opening and closing size of the open slot 223 of the plug 22.
In this embodiment, after the plug 22 is inserted into the steel pipe body 10, the sliding sleeve 23 is slidably abutted to the end wall of the steel pipe body 10, the supporting mechanism 25 supports the plug 22, the opening groove 223 of the plug 22 is opened, and the outer diameter of the plug 22 on the side of the sliding sleeve 23 away from the steel pipe body 10 is increased, so that the sliding sleeve 23 is prevented from reversely sliding, and the sliding sleeve 23 is ensured to be always abutted to the side wall of the steel pipe body 10.
In this embodiment, the supporting mechanism 25 includes a rotating cylinder 251 and a screw rod 252, the rotating cylinder 251 is a hollow structure with two open ends, and internal threads are distributed on the inner wall of the rotating cylinder 251, the screw rods 252 are assembled on the two threads of the rotating cylinder 251, the end of the screw rod 252 is connected with a gasket 253, and the gasket 253 abuts on the inner wall of the connector 22, in this embodiment, after the connector 22 is inserted into the steel pipe body 10, the sliding sleeve 23 abuts on the end wall of the steel pipe body 10, the screw rod 252 is driven to be outwardly screwed out by the rotation of the rotating cylinder 251, the screw rod 252 drives the gasket 253 to prop up the connector 22, the open slot 223 on the connector 22 is opened, the reverse sliding of the sliding sleeve 23 is avoided, and the positioning effect is achieved on the sliding sleeve 23.
In the embodiment, the sliding sleeve 23 is abutted against the end wall of the steel pipe body 10 to play a positioning role, so that the connecting line between A and B is perpendicular to and equally divided with the steel pipe body 10, and the C line is ensured to be positioned in the center of the steel pipe body 10.
In this embodiment, after the C-line position is determined, the pressing mechanism 30 applies pressure to the C-line position on the steel pipe body 10, the displacement sensor, the data acquisition unit and the result output unit in the pressing mechanism 30 respectively display the magnitude of the force F applied to the steel pipe body 10 and the deflection Δ of the steel pipe body 10, in addition, the steel elastic modulus E of the steel pipe body 10 is obtained by querying a technical manual, in addition, the length l of the steel pipe body 10 and the outer diameter D of the steel pipe body 10 are determined by measurement, and the measurement can be known according to the mechanical principle formula of a simply supported steel frame:
in the above formula: l is the length of the steel pipe body 10;
f is the pressure applied to the steel pipe body 10 by the pressure applying mechanism 30;
delta is the deflection of the steel pipe body 10 after being stressed;
d is the outer diameter of the steel pipe body 10;
d is the equivalent wall thickness of the steel pipe body 10.
The calculation formula that can be derived from the above equation (1) for the equivalent wall thickness of the steel pipe body 10 is:
the equivalent wall thickness of the steel pipe body 10 can be calculated by the calculation formula (formula 2) of the equivalent wall thickness of the steel pipe body 10.
In this embodiment, in order to further clearly describe the method for measuring the equivalent wall thickness of the fabricated scaffold steel tube, the following steps are given in this embodiment:
the first step is as follows: determining the center position of the steel pipe body 10, in the step, firstly assembling the positioning mechanisms 20 at the two ends of the steel pipe body 10, determining the position of the point A, determining the position of the point B after the positioning mechanisms 20 are turned over, and forming a line C by the connection line between the point A and the point B and the steel pipe body 10 in a superposition mode, namely the center position of the steel pipe body 10.
It should be noted that, in the first step, the positioning mechanism 20 is inserted into two ends of the steel pipe body 10 through the inserting pieces 22, wherein the inserting manner is divided into 2 types, and the steps are as follows:
the first mode is as follows: the plug 22 is inserted into the steel pipe body 10, the push disc 24 is rotated, the push disc 24 moves along the length direction of the plug 22, and the push disc 24 pushes the sliding sleeve 23 to abut against the end of the steel pipe body 10.
The second mode is as follows: the plug connector 22 is inserted into the steel pipe body 10, the sliding sleeve 23 is pushed to the end wall of the steel pipe body 10, and the supporting mechanism 25 pushes the plug connector 22 to be opened through adjustment to limit and fix the sliding sleeve 23.
In the above two embodiments, the specific adjustment method of the support mechanism 25 is as follows: the rotating cylinder 251 rotates to drive the screw rod 252 to be screwed out, the screw rod 252 drives the gasket 253 to jack up the plug connector 22, the open slot 223 in the plug connector 22 is opened, and the defect that the sliding sleeve 23 slides reversely is overcome.
The second step of the measurement method in this example is as follows:
the second step is that: the pressing mechanism 30 presses the center position of the steel pipe body 10, namely the position of the C line, the magnitude of the force F applied to the steel pipe body 10 and the deflection delta of the steel pipe body 10 are detected through the displacement sensor, the data collector and the result output unit, the length l of the steel pipe body 10 and the outer diameter D of the steel pipe body 10 are measured, and the steel elastic modulus E of the steel pipe body 10 is obtained through consulting;
and thirdly, calculating the equivalent wall thickness through an equivalent wall thickness calculation formula of the steel pipe body 10.
The main working mode in this embodiment is to determine the center position of the steel pipe body 10, that is, the C line position explained in this embodiment, by applying pressure to the C line position through the pressure applying mechanism 30, the displacement sensor, the data collector and the result output unit detect the magnitude of the force F applied to the steel pipe body 10 and the deflection Δ of the steel pipe body 10, measure the length l of the steel pipe body 10 and the outer diameter D of the steel pipe body 10, and calculate the equivalent wall thickness of the steel pipe body 10 by looking up the obtained steel material elastic modulus E, the method in this embodiment ensures the positioning accuracy of the center position of the steel pipe body 10, thereby improving the calculation accuracy of the equivalent wall thickness of the steel pipe body 10 for use.
While the invention has been described in further detail in connection with specific embodiments thereof, it will be understood that the invention is not limited thereto, and that various other modifications and substitutions may be made by those skilled in the art without departing from the spirit of the invention, which should be considered to be within the scope of the invention as defined by the appended claims.
Claims (8)
1. An assembled scaffold steel pipe equivalent wall thickness measuring device measures the equivalent wall thickness of a steel pipe body (10), and comprises a pressure applying mechanism (30), wherein the pressure applying mechanism (30) comprises a pressure part, a displacement sensor, a data acquisition unit and a result output unit which are embedded in the pressure part,
the method is characterized in that:
the steel pipe connecting structure is characterized by further comprising a positioning mechanism (20), wherein the positioning mechanism (20) comprises connecting rods (21) with end parts hinged and symmetrical, the tail ends of the connecting rods (21) are hinged with plug connectors (22), the plug connectors (22) are respectively plugged into two ends of the steel pipe body (10), and the lengths of the connecting rods (21) are equal;
the steel pipe connecting structure is characterized in that a sliding sleeve (23) is sleeved on the plug connector (22), the tail end of the connecting rod (21) is hinged to the sliding sleeve (23), and after the plug connector (22) is inserted into the steel pipe body (10), the sliding sleeve (23) needs to abut against the end wall of the steel pipe body (10);
wherein the positioning mechanism (20) can be overturned in the steel pipe body (10) by the axis of the steel pipe body (10);
when the device is used, the position of the A point is determined, and the position of the A point is the connecting part of the 2 connecting rods 21; then, the positioning mechanism (20) is turned over by the central axis of the steel pipe body (10), the connection position of the turned 2 connecting rods (21) is a point B, the point A and the point B are connected, a connecting line between A and B and a repeated part of the steel pipe body (10) form a line C, and the line C is located in the middle of the steel pipe body (10);
plug connector (22) constitute by screw thread portion (221) and filling portion (222), plug connector (22) in filling portion (222) peg graft and enter into steel pipe body (10) in, screw thread portion (221) go up the cover and be equipped with push away dish (24), push away dish (24) with screw thread portion (221) screw assembly.
2. The fabricated scaffold steel tube equivalent wall thickness measuring device of claim 1, wherein: the connector clip (22) be tubular structure, open slot (223) have been seted up on the lateral wall of connector clip (22), open slot (223) prolong the one end of connector clip (22), be provided with supporting mechanism (25) in the inside of connector clip (22), the opening and shutting size of open slot (223) that supporting mechanism (25) are used for adjusting connector clip (22).
3. The fabricated scaffold steel tube equivalent wall thickness measuring device of claim 2, wherein: the supporting mechanism (25) comprises a rotating cylinder (251) and a screw rod (252), the rotating cylinder (251) is of a hollow structure with two open ends, internal threads are distributed on the inner wall of the rotating cylinder (251), the screw rod (252) is assembled on the threads at the two ends of the rotating cylinder (251), the tail end of the screw rod (252) is connected with a gasket (253), and the gasket (253) abuts against the inner wall of the plug connector (22).
4. A method for measuring the equivalent wall thickness of a steel pipe of an assembled scaffold by using the measuring device of claim 1 is characterized by comprising the following steps:
the first step is as follows: determining the center position of a steel pipe body (10), assembling positioning mechanisms (20) at two ends of the steel pipe body (10), defining a hinge point of a connecting rod (21) as a point A, overturning the positioning mechanisms (20) by using the central axis of the steel pipe body (10), wherein the hinge point of the connecting rod (21) in the overturned positioning mechanisms (20) is a point B, a connecting line between the point A and the point B is superposed with the steel pipe body (10) to form a line C, and the position of the line C on the steel pipe body (10) is the center position of the steel pipe body (10);
the second step is that: the center position of the steel pipe body (10), namely the C line position, is pressed through a pressing mechanism (30), the magnitude of force F borne by the steel pipe body (10) and the deflection delta of the steel pipe body (10) are detected through a displacement sensor, a data acquisition unit and a result output unit, the length l of the steel pipe body (10) and the outer diameter D of the steel pipe body (10) are measured, and the steel elastic modulus E of the steel pipe body (10) is obtained through consulting;
and thirdly, calculating the equivalent wall thickness through an equivalent wall thickness calculation formula of the steel pipe body (10).
5. The fabricated scaffold steel tube equivalent wall thickness measuring method according to claim 4, wherein: the equivalent wall thickness calculation formula is as follows:
in the formula: l is the length of the steel pipe body (10);
f is the pressure applied to the steel pipe body (10) by the pressure applying mechanism (30);
delta is the deflection of the steel pipe body (10) after being subjected to pressure;
d is the outer diameter of the steel pipe body (10);
d is the equivalent wall thickness of the steel pipe body (10).
6. The fabricated scaffold steel tube equivalent wall thickness measuring method according to claim 4, wherein: in the first step, the positioning mechanism (20) is assembled at the two ends of the steel pipe body (10) by using the plug connector (22) in claim 3, and the assembly method is as follows:
the plug connector (22) is plugged into the steel pipe body (10), the pushing disc (24) is rotated, the pushing disc (24) moves along the length direction of the plug connector (22), and the pushing disc (24) pushes the sliding sleeve (23) to abut against the end portion of the steel pipe body (10).
7. The fabricated scaffold steel tube equivalent wall thickness measuring method according to claim 4, wherein: in the first step, the positioning mechanism (20) is assembled at the two ends of the steel pipe body (10) by using the plug connector (22) in claim 4 in the following way:
the plug connector (22) is plugged into the steel pipe body (10), the sliding sleeve (23) is pushed to the end wall of the steel pipe body (10), and the supporting mechanism (25) pushes the plug connector (22) to be opened to limit and fix the sliding sleeve (23) through adjustment.
8. The fabricated scaffold steel tube equivalent wall thickness measuring method according to claim 4, wherein: the specific adjustment mode of the supporting mechanism (25) is as follows: the rotating cylinder (251) rotates to drive the screw rod (252) to be screwed out, the screw rod (252) drives the gasket (253) to jack the plug connector (22), and the open slot (223) in the plug connector (22) is opened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111440140.7A CN113865537B (en) | 2021-11-30 | 2021-11-30 | Device and method for measuring equivalent wall thickness of steel pipe of assembled scaffold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| GB1463949A (en) * | 1975-12-24 | 1977-02-09 | Ainsworth H B | Marking gauge |
| CN103759690B (en) * | 2014-01-09 | 2016-05-11 | 中国建筑股份有限公司 | A kind of scaffolding steel pipe equivalence wall thickness measuring device and measuring method thereof |
| CN206970011U (en) * | 2017-07-28 | 2018-02-06 | 浙江超力不锈钢制管有限公司 | A kind of stainless steel tube suspension bracket |
| CN109571398A (en) * | 2018-12-26 | 2019-04-05 | 亚杰科技（江苏）有限公司 | A kind of raw material center line planning component |
| CN213411982U (en) * | 2020-09-27 | 2021-06-11 | 大连开成钢管有限公司 | Steel pipe longitudinal median line marking device |
| CN112706146A (en) * | 2020-12-23 | 2021-04-27 | 苏州震伴威自动化设备科技有限公司 | Be applied to central line marking device of steel |
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