CN103759690B - A kind of scaffolding steel pipe equivalence wall thickness measuring device and measuring method thereof - Google Patents

Abstract

A device for measuring the equivalent wall thickness of a scaffold steel pipe and its measurement method. The loading detection component is fixedly placed on a simply supported steel frame, and a concentrated force F is directly applied to the middle position of the scaffold steel pipe to be measured. According to the principle of mechanics, and the measured The equivalent wall thickness of the steel pipe ( ), the present invention accurately calculates the equivalent wall thickness of the scaffold steel pipe by applying force to the scaffold steel pipe to be tested, according to the magnitude of the applied force and the deformation degree of the scaffold steel pipe to be tested. The invention is easy to operate, automatically monitors the applied force and the deformation data of the scaffold steel pipe, avoids the error of manual reading, has accurate and reliable measurement results, and has the advantages of low cost, simple operation, accurate measurement data and high efficiency.

Description

A device for measuring the equivalent wall thickness of scaffolding steel pipes and its measuring method

technical field

The invention relates to the field of building material measurement, in particular to a device for measuring the equivalent wall thickness of scaffolding steel pipes and a measurement method thereof.

Background technique

At present, there are many problems in the use of steel pipe scaffolding. For example, because the steel pipe is repeatedly used, it is exposed to wind and rain for a long time, and it is easy to rust, which causes the thickness of the steel pipe to change, which affects the construction safety. Therefore, it is necessary to Detect changes in the thickness of steel pipe scaffolding, and take necessary measures in time. At present, the thickness of steel pipes is mainly measured manually by contact calipers. This method is cumbersome, time-consuming and labor-intensive, and relies on human eye detection. Long-term visual inspection can easily cause human eye fatigue, resulting in large measurement errors and low accuracy. In addition, the current steel pipe thickness measuring instrument has high cost, complex structure, inconvenient to carry, high construction conditions, and is not suitable for measuring the thickness of steel pipe scaffolding. Therefore, when inspecting and accepting the quality of steel pipe scaffolding, a kind of The automatic measurement method that can conveniently, quickly and accurately obtain the wall thickness of the scaffolding steel pipe can realize timely and accurate measurement of the thickness of the steel pipe, and avoid construction risks caused by the substandard thickness of the steel pipe.

Contents of the invention

The purpose of the present invention is to provide a scaffold steel pipe equivalent wall thickness measurement device and its measurement method, which overcomes the cumbersome manual measurement operation of the existing contact caliper, which is time-consuming and labor-intensive, and relies on human eye detection, and long-term visual inspection is easy to cause human eyes. Fatigue, large measurement errors, and low accuracy; at the same time, it also solves the problems of high cost, complex structure, inconvenient to carry, high requirements for construction conditions, and unsuitable for scaffolding steel pipe thickness measurement. .

In order to realize the above-mentioned technical purpose, the present invention adopts following technical scheme:

A scaffold steel pipe equivalent wall thickness measurement device, comprising a simply supported steel frame supporting the scaffold steel pipe to be measured and a loading detection component connected to the simply supported steel frame, characterized in that: the main body of the simply supported steel frame is horizontal A supporting steel beam, each side of the supporting steel beam is connected with a vertical supporting ear plate perpendicular to the supporting steel beam; the surface of the supporting ear plate is correspondingly provided with a scaffolding steel pipe reserved opening, so The scaffold steel pipe to be tested is placed in the middle of the simply supported steel frame through the reserved openings of the scaffold steel pipe on both sides; the loading detection component includes a sequentially connected loading unit, a sensor, a data collector, a data processing unit and a result output unit , after the force-applying end at the end of the loading unit passes through the supporting steel beam vertically through the reserved hole in the middle of the supporting steel beam, the lower part abuts against the steel pipe of the scaffolding to be tested and directly exerts force on the steel pipe of the scaffolding to be measured, the axis of the force-applying end The axis of the scaffold steel pipe to be tested is perpendicular to each other; the sensor is connected to the force end of the end of the loading unit and is in direct contact with the scaffold steel pipe to be tested, including a force sensor and a displacement sensor.

As a preferred solution of the present invention, the shape of the supporting ear plate is a square plate or a trapezoidal plate with a narrow top and a wide bottom.

As a preferred solution of the present invention, the loading unit is a screw or a small hydraulic cylinder activated manually or electrically.

The force sensor is embedded in the bottom of the screw rod or the force application end of the small hydraulic cylinder, the displacement sensor is fixed on the side of the force application end, and the sensor is connected to the force application end at the end of the loading unit. Both the force sensor and the displacement sensor are directly Contact the scaffold steel pipe to be tested.

A method for measuring the equivalent wall thickness of a scaffold steel pipe by using the above-mentioned scaffold steel pipe equivalent wall thickness measuring device, characterized in that: the measurement steps are as follows:

Step 1. Support simply supported steel frame: place the simply supported steel frame stably on the ground, insert the two ends of the scaffold steel pipe to be tested into the reserved openings of the scaffold steel pipe on the two support ear plates and place them in the center and fix them firmly. The scaffold steel pipe to be tested is parallel to the supporting steel beam;

Step 2. Install the loading detection part: pass the force end of the loading unit end through the reserved hole in the middle of the supporting steel beam, pass through the supporting steel beam vertically from top to bottom, and then touch the lower part against the middle of the steel pipe of the scaffold to be tested, so that the force end The axis of the head and the axis of the scaffold steel pipe to be tested are perpendicular to each other, and then connected to the relevant components of the sensor, data collector, data processing unit and result output unit in sequence;

Step 3. Preheating of the equipment: preheat the sensor and data collector, and the preheating time should not be less than 30s;

Step 4. Apply force to the steel pipe of the scaffolding to be tested: start the loading unit, apply a concentrated force directly through the force-applying end at the end of the steel pipe of the scaffolding to be tested, and ensure that the deformation of the steel pipe is controlled within the elastic deformation range of the steel beam during the force application process;

Step 5. Data collection: the data collector collects the deflection of the steel pipe when the force is applied and the magnitude of the force F;

Step 6. Data processing and calculation: Calculate the equivalent wall thickness of the scaffold steel pipe to be tested. According to the mechanical principle of the simply supported steel frame, the equivalent wall thickness formula of the steel pipe can be deduced, namely , where D is the outer diameter of the steel pipe, F is the force on the steel pipe, is the length of the scaffold steel pipe to be tested, E is the elastic modulus of the steel pipe, is the deflection of the steel pipe;

Step 7. Output the result: output the equivalent wall thickness value of the steel pipe of the scaffolding to be tested, so far, the measurement is completed.

As a preferred solution of the present invention, repeat step 1 to step 7 3 to 5 times, and take the average value of all measurement results as the final equivalent wall thickness of the scaffold steel pipe to be tested.

Compared with the prior art, the technical advantage of the present invention is that by applying force to the steel pipe, the equivalent wall thickness of the scaffold steel pipe can be accurately calculated according to the magnitude of the applied force and the degree of deformation of the scaffold steel pipe. The effective wall thickness measurement device has a simple structure, and the detection method is easy to operate. It can automatically monitor the applied force and the deformation data of the scaffold steel pipe, avoiding the error of manual reading, the measurement result is accurate and reliable, and the efficiency is high. It overcomes the cumbersome manual measurement operation of the existing contact caliper. , time-consuming and labor-intensive, and rely on human eye detection, long-term visual inspection can easily cause human eye fatigue, large measurement errors, and low accuracy; in addition, the present invention is low in cost, easy to use, simple in operation, and also solves the problem of The existing steel pipe thickness measuring instrument has the problems of high cost, complex structure, inconvenient portability, high requirements for construction conditions, and is not suitable for measuring the thickness of scaffold steel pipes.

Description of drawings

Fig. 1 is the elevation structural representation of scaffold steel pipe equivalent wall thickness measuring device of the present invention;

Fig. 2 is the front structural representation of scaffold steel pipe equivalent wall thickness measuring device of the present invention;

Fig. 3 is the side structure schematic diagram of scaffold steel pipe equivalent wall thickness measuring device of the present invention;

Fig. 4 is a schematic diagram of the internal connections of the loading detection components of the present invention.

Reference signs: 1-simply supported steel frame, 11-supporting steel beam, 12-supporting ear plate, 2-loading detection component, 21-loading unit, 22-sensor, 221-force sensor, 222-displacement sensor, 23- Data collector, 24-data processing unit, 25-result output unit, 3-scaffold steel pipe to be tested, 4-reserved opening for scaffold steel pipe.

detailed description

As shown in Figures 1 to 3, a device for measuring the equivalent wall thickness of a scaffold steel pipe includes a simply supported steel frame 1 supporting the scaffold steel pipe to be measured and a loading detection component 2 connected to the simply supported steel frame 1, and is characterized in that: The main body of the simply supported steel frame 1 is a horizontal supporting steel beam 11, and each side of the supporting steel beam 11 is connected with a vertical supporting ear plate 12 perpendicular to the supporting steel beam; The plate surface of the plate 12 is correspondingly provided with a scaffold steel pipe reserved opening 4, and the scaffold steel pipe 3 to be tested is cross-armed in the middle of the simply supported steel frame through the scaffold steel pipe reserved opening 4 on both sides; the loading detection part 2 includes The loading unit 21, the sensor 22, the data collector 23, the data processing unit 24 and the result output unit 25 connected in sequence, the force-applying end at the end of the loading unit 21 passes through the supporting steel vertically through the reserved hole in the middle of the supporting steel beam After the beam 11, the lower part is pressed against the scaffold steel pipe 3 to be tested to directly exert force on the scaffold steel pipe to be measured, and the axis of the force-applying end and the axis of the scaffold steel pipe 3 to be measured are perpendicular to each other; the sensor 22 includes a force sensor 221 and a displacement sensor 222. The shape of the supporting ear plate 12 can be a square plate or a trapezoidal plate with a narrow top and a wide bottom. The loading unit 21 can be a screw rod or a small hydraulic cylinder activated manually or by an electric pump (such as a miniature electric oil pump). The force sensor 221 is embedded in the bottom of the force end of the screw rod or small hydraulic cylinder. Fixed on the side of the end of the force application, the force sensor 221 and the displacement sensor 222 are all in direct contact with the scaffold steel pipe 3 to be tested, and the force sensor 221 and the displacement sensor 222 are connected to the data collector 23, the data processing unit 24 and the result output unit 25 in sequence .

A method for measuring the equivalent wall thickness of a scaffold steel pipe by using the device for measuring the equivalent wall thickness of a scaffold steel pipe according to any one of claims 1 to 3, wherein the measurement steps are as follows:

Step 1. Support simply supported steel frame 1: place simply supported steel frame 1 stably on the ground, insert the two ends of the scaffold steel pipe 3 to be tested into the reserved openings 4 of the scaffold steel pipe on the two support ear plates and place them in the center Firmly fixed, the scaffolding steel pipe 3 to be tested is now parallel to the supporting steel beam 11;

Step 2. Install the loading detection part 2: pass the force end of the loading unit 21 through the reserved hole in the middle of the supporting steel beam, pass through the supporting steel beam 11 vertically from top to bottom, and then abut the lower part against the steel pipe 3 of the scaffold to be tested. In the middle, make the axis of the force application end and the axis of the scaffold steel pipe 3 to be measured perpendicular to each other, and then connect the relevant components of the sensor 22, the data collector 23, the data processing unit 24 and the result output unit 25 in sequence;

Step 3. Preheating of the equipment: preheat the sensor (22) and the data collector (23), and the preheating time is 30s;

Step 4. Applying force to the scaffolding steel pipe 3 to be tested: start the loading unit 21, apply a concentrated force directly through the force application end at the end of the scaffolding steel pipe 3 to be measured, and ensure that the deformation of the steel pipe is controlled within the elastic deformation range of the steel beam during the force application process;

Step 5. Data collection: the data collector collects the deflection of the steel pipe when the force is applied and the magnitude of the force F;

Step 6. Data processing and calculation: Calculate the equivalent wall thickness of the scaffold steel pipe to be tested, according to the mechanical principle of simply supported steel frame, by the formula The equivalent wall thickness formula of the steel pipe can be deduced, namely , where D is the outer diameter of the steel pipe, is the length of the scaffold steel pipe to be tested, E is the elastic modulus of the steel pipe, F is the force on the steel pipe, is the steel pipe deflection of the steel pipe (deducting the deformation of the support frame under the action of force F);

Step 7. Output result: output the equivalent wall thickness value of the scaffold steel pipe to be tested.

In order to make the result more accurate, the measurement was repeated 3 times, and the average value of all the equivalent wall thickness measurement results was taken as the final equivalent wall thickness. So far, the measurement is completed.

Claims (4)

1. A scaffold steel pipe equivalent wall thickness measuring device, comprising a simply supported steel frame (1) supporting the scaffold steel pipe to be measured and a loading detection component (2) connected to the simply supported steel frame (1), characterized in that: The main body of the simply supported steel frame (1) is a horizontal supporting steel beam (11), and each side of the supporting steel beam (11) is connected with a vertical supporting ear plate perpendicular to the supporting steel beam (12); the surface of the support ear plate (12) is correspondingly provided with a scaffold steel pipe reserved opening (4), and the scaffold steel pipe (3) to be tested passes through the scaffold steel pipe reserved openings (4) on both sides Bear in the middle of simply supported steel frame; The loading detection component (2) includes a loading unit (21), a sensor (22), a data collector (23), a data processing unit (24) and a result output unit (25) connected in sequence, and the loading unit ( 21) After the force-applying end at the end passes through the supporting steel beam (11) vertically through the reserved hole in the middle of the supporting steel beam, the lower part abuts against the scaffolding steel pipe to be tested (3) to directly exert force on the scaffolding steel pipe to be tested. The force-applying end The axis of the head and the axis of the scaffold steel pipe (3) to be tested are perpendicular to each other; the sensor (22) is connected to the end of the loading unit (21) and is in direct contact with the scaffold steel pipe (3) to be tested, including the force sensor (221) and displacement sensor (222); The shape of the supporting ear plate (12) is a square plate or a trapezoidal plate with a narrow top and a wide bottom; The loading unit (21) is a screw or a small hydraulic cylinder activated manually or electrically. 2. A scaffold steel pipe equivalent wall thickness measuring device according to claim 1, characterized in that: the force sensor (221) is embedded in the bottom of the screw rod or the force application end of the small hydraulic cylinder, and the displacement sensor (222 ) is fixed on the side of the force-applying end, and the force sensor (221) and the displacement sensor (222) are in direct contact with the scaffold steel pipe (3) to be tested. 3. A method for measuring the equivalent wall thickness of a scaffold steel pipe with the scaffold steel pipe equivalent wall thickness measuring device described in any one of claims 1 to 2, characterized in that: the measurement steps are as follows: Step 1. Support the simply supported steel frame (1): place the simply supported steel frame (1) on the ground stably, and insert the two ends of the scaffold steel pipe (3) to be tested into the reserved scaffold steel pipes on the two supporting ear plates Place it in the middle of the mouth (4) and fix it firmly, and at this time the scaffold steel pipe (3) to be tested is parallel to the supporting steel beam (11); Step 2. Install the loading detection component (2): pass the force end of the loading unit (21) through the reserved hole in the middle of the supporting steel beam, and pass through the supporting steel beam (11) vertically from top to bottom. In the middle of the scaffold steel pipe (3) to be tested, the axis of the force-applying end and the axis of the scaffold steel pipe (3) to be tested are perpendicular to each other, and then the sensor (22), data collector (23), and data processing unit (24) are connected in sequence ) and related components of the result output unit (25); Step 3. Power-on preheating: preheat the sensor (22) and data collector (23) after power-on, and the preheating time should not be less than 30s; Step 4. Apply force to the scaffold steel pipe (3) to be tested: start the loading unit (21), apply a concentrated force through the force application end at the end of the scaffold steel pipe (3) to be tested, and ensure that the deformation of the steel pipe is controlled within the elastic deformation of the steel beam during the force application process within the scope; Step 5. Data collection: Use sensors and data collectors to collect steel pipe deflection when force is applied and the magnitude of the force F; Step 6. Data processing and calculation: Calculate the equivalent wall thickness of the scaffold steel pipe to be tested. According to the mechanical principle of the simply supported steel frame, the equivalent wall thickness formula of the steel pipe can be deduced, namely , where D is the outer diameter of the steel pipe, F is the force on the steel pipe, is the length of the scaffold steel pipe to be tested, E is the elastic modulus of the steel pipe, is the deflection of the steel pipe; Step 7. Output the result: output the equivalent wall thickness value of the steel pipe of the scaffolding to be tested, so far, the measurement is completed. 4. A method for measuring the equivalent wall thickness of a scaffold steel pipe according to claim 3, characterized in that: repeat step 1 to step 7 3 to 5 times, and get the average value of all measurement results as the final value of the scaffold steel pipe to be tested. equivalent wall thickness.