Full-automatic anti-leakage test device for bent metal corrugated pipe

Abstract

The invention relates to a full-automatic anti-leakage test device for a bent metal corrugated pipe, the device is composed of a bending mechanism, an auxiliary fixing mechanism and a control system, the bending mechanism comprises a bottom plate, a stand column, an upper fixing end, a lower fixing end and a linear telescopic device; four trundles are arranged at the bottom of the bottom plate, and the stand column is vertically arranged on the bottom plate; the upper fixing end is arranged at the end, away from the bottom plate, of the right side of the stand column, the first attachment fixing device is installed at the bottom of the upper fixing end, the seven linear telescopic devices are horizontally arranged on the stand column and evenly distributed from the upper fixing end to the lower fixing end, and the auxiliary fixing mechanism is used for stably fixing a bent metal corrugated pipe. The control system controls the servo motor and the servo gear motor through a control signal, and is used for controlling the automatic operation of the whole test process. The device can automatically complete the steps of bending, fixing and the like of the metal corrugated pipe, the testing efficiency is improved, and personal errors are reduced.

Description

Technical Field

[0001] The invention relates to the field of building material testing equipment, in particular to a fully automatic anti-leakage testing device for a metal bellows after bending. Background Art

[0002] Metal bellows are widely used in buildings, bridges and other fields, and their anti-leakage performance is an important indicator for evaluating their quality. Most existing testing methods rely on manual operation, with low test efficiency and test results that are easily affected by human factors. Therefore, it is of great significance to develop a fully automatic, efficient and accurate anti-leakage test device for metal bellows after bending.

[0003] There are two types of anti-leakage test devices for metal bellows after bending sold on the market. The first type is the template type, that is, the installation test requires making a template groove according to the bending radius of different pipe diameters, and the bellows is clamped in the template groove to complete the test. This method requires a template groove for each pipe diameter, and the number of configurations is large and bulky, which is inconvenient to use. The second type is the bolt adjustment type, that is, two rows of adjustment screws are installed on a large arc groove, and the position of the fixed pipe is adjusted by hand-tightening the screws to achieve the bending radius of different pipe diameters. This method can solve the problem of one device for different pipe diameters. When the screw adjustment position is completely adjusted manually, the accuracy of the bending radius value cannot be guaranteed, and the test operation is inconvenient. It is completely based on human touch positioning and cannot truly meet the test requirements of the specification. Summary of the invention

[0004] In order to solve the above problems, the present application provides a fully automatic metal bellows anti-leakage test device after bending, which can automatically complete the bending, fixing and other steps of the metal bellows, improve the test efficiency and reduce human errors. The device consists of a bending mechanism, an auxiliary fixing mechanism and a control system.

[0005] The bending mechanism includes a base plate, a column, an upper fixed end, a lower fixed end and a linear telescopic device. Four casters are arranged at the bottom of the base plate, and the column is vertically placed on the base plate; the upper fixed end is placed on the right side of the column away from the base plate, and the right end of the upper fixed end is provided with an upper rolling shaft, and the lower fixed end is placed on the right side of the column close to the base plate, and the right end of the lower fixed end is provided with a lower rolling shaft. There are 7 linear telescopic devices, which are horizontally arranged on the column and evenly distributed between the upper fixed end and the lower fixed end. The linear telescopic device consists of a servo motor, a servo reduction motor, a ball screw servo electric cylinder, an electric cylinder shaft and a stretching clamp. The servo motor, the servo reduction motor and the ball screw servo electric cylinder are fixed on the left side of the column, and the electric cylinder shaft is located on the right side of the column. The stretching clamp is fixed to the right end of the electric cylinder shaft and is used to clamp the metal bellows.

[0006] The auxiliary fixing mechanism is used to fix the bent metal corrugated pipe, and includes an upper attachment fixing device, an upper attachment clamping rod, a lower attachment fixing device, and a lower attachment clamping rod. The upper attachment fixing device is installed at the bottom of the upper fixed end, the left end of the upper attachment clamping rod is installed at the bottom of the upper attachment fixing device, the lower attachment fixing device is installed at the top of the lower fixed end, and the left end of the lower attachment clamping rod is installed at the top of the lower attachment fixing device.

[0007] The control system is used to control the automated operation of the test process, control each servo motor to drive the electric cylinder shaft to execute the corresponding stretching distance, and control the servo reduction motor to adjust the stretching fixture to adapt to the diameter of the metal bellows. The stretching distance is calculated based on the preset bending radius and chord length of the metal bellows.

[0008] Preferably, the linear telescopic device also includes an origin magnetic induction switch, an upper limit magnetic induction switch and a lower limit magnetic induction switch. The origin magnetic induction switch is used to locate the initial position of the spindle of the linear telescopic device, and the upper limit magnetic induction switch and the lower limit magnetic induction switch are used to limit the travel ends of the spindle of the linear telescopic device.

[0009] Preferably, the control system adopts PLC control.

[0010] Preferably, the device further comprises a human-machine interaction interface, including a pipe diameter selection interface, a screen parameter setting interface and a control parameter setting interface, and the human-machine interaction interface is connected to the control system to transmit the setting parameters.

[0011] Preferably, the device further comprises a grouting mechanism, and the grouting mechanism pumps cement slurry out from the upper end of the metal bellows through a water pump and injects it into the metal bellows.

[0012] Preferably, the device further comprises an observation mechanism, which records leakage conditions on the surface of the metal bellows through a camera.

[0013] Preferably, the stretching distance is calculated based on the preset bending radius and chord length of the metal bellows, specifically: The electric cylinder axis of the linear telescopic device located between the upper fixed end and the lower fixed end is set as the central axis, and its displacement is: ; The electric cylinder axes of the other linear telescopic devices are distribution axes, and the displacement of each distribution axis is: ; In the formula, h is the displacement of the central axis, R is the preset bending radius of the metal bellows, L is the distance between the upper fixed end 13 and the lower fixed end 14, hn is the displacement of the distribution axis, and Ln is the distance between the distribution axis and the central axis.

[0014] The fully automatic metal bellows anti-leakage test device provided in the present application realizes automation, improves test efficiency, reduces human errors, reduces test costs, and can adapt to the testing of metal bellows with various pipe diameters. It has a wide range of applications and provides an efficient and accurate testing method for the building materials industry. At the same time, the device realizes an integrated design of bending, fixing, grouting, observation and recording steps, and the operation process is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0016] Figure 1 This is the device structure diagram before the metal bellows is bent.

[0017] In the attached figure: 11-base plate; 12-column; 13-upper fixed end; 14-lower fixed end; 15-linear telescopic device; 16-castor; 131-upper rolling shaft; 141-lower rolling shaft; 151-servo motor; 152-servo reduction motor; 153-ball screw servo electric cylinder, 154-electric cylinder shaft; 155 stretching fixture; 156-origin magnetic induction switch; 157-upper limit magnetic induction switch; 158-lower limit magnetic induction switch; 21-upper attachment fixing device; 22-upper attachment clamping rod; 23-lower attachment fixing device; 24-lower attachment clamping rod; 4-Metal bellows. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0019] The embodiment provides a fully automatic metal bellows anti-leakage test device after bending, the structure diagram of which is shown in the attached figure. Figure 1 As shown, the device consists of a bending mechanism, an auxiliary fixing mechanism and a control system.

[0020] The bending mechanism is used to bend the metal corrugated tube to a set curvature radius, and includes a base plate 11, a column 12, an upper fixed end 13, a lower fixed end 14, and a linear telescopic device 15. Four casters 16 are arranged at the bottom of the base plate 11, and the column 12 is vertically placed on the base plate 11; the upper fixed end 13 is placed on the right side of the column 12, away from the base plate 11, and the right end of the upper fixed end 13 is provided with an upper rolling shaft 131, and the lower fixed end 14 is placed on the right side of the column 12, close to the base plate 11, and the right end of the lower fixed end 14 is provided with a lower rolling shaft 141. There are 7 linear telescopic devices 15, which are horizontally arranged on the column 12. The fixed end 13 is evenly distributed to the lower fixed end 14. The linear telescopic device 15 is composed of a servo motor 151, a servo reduction motor 152, a ball screw servo electric cylinder 153, an electric cylinder shaft 154 and a stretching fixture 155. The servo motor 151, the servo reduction motor 152 and the ball screw servo electric cylinder 153 are fixed to the left side of the column 12, and the electric cylinder shaft 154 is located on the right side of the column 12. The stretching fixture 155 is fixed to the right end of the electric cylinder shaft 154, which is used to clamp the metal bellows 4. The function of the upper rolling shaft 131 and the lower rolling shaft 141 is that when the bellows is bent, the two ends of the bellows will slide and shrink toward the middle. The use of rolling shafts facilitates the sliding of the fixed bellows and reduces friction resistance.

[0021] The linear telescopic device also includes an origin magnetic induction switch 156, an upper limit magnetic induction switch 157 and a lower limit magnetic induction switch 158. The origin magnetic induction switch 156 is used to locate the initial position of the spindle of the linear telescopic device 15, and the upper limit magnetic induction switch 157 and the lower limit magnetic induction switch 158 are used to limit the travel ends of the spindle of the linear telescopic device 15.

[0022] The auxiliary fixing mechanism is used to fix the bent metal bellows to prevent it from lateral displacement, and includes an upper attachment fixing device 21, an upper attachment clamping rod 22, a lower attachment fixing device 23, and a lower attachment clamping rod 24. The upper attachment fixing device 21 is installed at the bottom of the upper fixed end 13, the left end of the upper attachment clamping rod 22 is installed at the bottom of the upper attachment fixing device 21, the lower attachment fixing device 23 is installed at the top of the lower fixed end 14, and the left end of the lower attachment clamping rod 24 is installed at the top of the lower attachment fixing device 23. In this embodiment, the upper attachment fixing device 21 and the lower attachment fixing device 23 are a set of hand-cranked positive and negative tooth ball screw slides, on which the upper attachment clamping rod 22 and the lower attachment clamping rod 24 are installed, which are installed perpendicular to the bellows at the upper and lower fixed ends. By adjusting the position of the slide, the support rod clamps the bellows to ensure that bellows of different sizes are in the middle position of the clamp.

[0023] The control system adopts PLC control to control the automated operation of the test process, and can control each servo motor 151 to drive the electric cylinder shaft 154 to perform the corresponding stretching distance, and can control the servo reduction motor 152 to adjust the stretching fixture 155 to adapt to the diameter of the metal bellows. The stretching distance is calculated according to the preset bending radius and chord length of the metal bellows. The device also includes a human-machine interaction interface using an HMI touch screen, including a diameter selection interface, a screen parameter setting interface, and a control parameter setting interface. The human-machine interaction interface is connected to the control system to transmit the setting parameters.

[0024] The stretching distance is calculated based on the preset bending radius and chord length of the metal bellows, specifically: The electric cylinder axis of the linear telescopic device located between the upper fixed end 13 and the lower fixed end 14 is set as the central axis, and its displacement is: ; The electric cylinder axes of the other linear telescopic devices are distribution axes, and the displacement of each distribution axis is: ; In the formula, h is the displacement of the central axis, R is the preset bending radius of the metal bellows, L is the distance between the upper fixed end 13 and the lower fixed end 14, hn is the displacement of the distribution axis, and Ln is the distance between the distribution axis and the central axis.

[0025] The device also includes a grouting mechanism and an observation mechanism. The grouting mechanism uses a water pump to pump cement slurry from the upper end of the metal bellows into the metal bellows, and the observation mechanism uses a camera to record leakage conditions on the surface of the metal bellows.

[0026] The working principle of the device described in the embodiment is: In the first step, the metal bellows to be tested is placed on the bending mechanism, and the control system starts the bending mechanism to bend the metal bellows to a set curvature radius.

[0027] In the second step, after the metal bellows is bent, the attachment and fixing mechanism automatically fixes the metal bellows to prevent it from lateral displacement.

[0028] In the third step, the grouting mechanism starts working and pours ordinary Portland cement slurry with a water-cement ratio of 0.50 into the metal bellows until it is full.

[0029] In the fourth step, the observation unit begins to observe and record the leakage on the surface of the metal bellows and continues the observation for 30 minutes.

[0030] Step 5. After the test is completed, the control system automatically stops the operation of all mechanisms and outputs the test results.

[0031] The device described in this embodiment is used to carry out the metal bellows anti-leakage performance test device after bending. The implementation steps are as follows: 1. Preparation stage: To ensure that the test equipment complies with the "Metal Bellows for Prestressed Concrete" (JG / T 225-2020) and at the same time ensure the safety of the test, this mechanism adopts a bellows support at both ends and a segmented stretching and bending structure in the middle. At the same time, all stretching points of the bellows are placed inside the stretching fixture frame to eliminate the risk of the bellows shrinking and popping out at both ends due to bending deformation and injuring people.

[0032] Prepare the metal bellows to be tested and ensure that its specifications meet the test requirements.

[0033] Seal one end of the metal bellows to ensure water-tightness.

[0034] (II) Experimental setup: First, turn on the power supply, and select the corresponding button on the human-computer interaction interface according to the type and diameter of the metal bellows to enter the test operation interface.

[0035] By clicking the reset all button, the system starts the servo motor to drive the servo electric cylinder to return the stretching fixture to the preset origin position, and at the same time clears the displacement value.

[0036] After installing the corresponding metal bellows, fasten the clamp lock, adjust the upper and lower centering auxiliary mechanisms, adjust the position of the metal bellows, keep the metal bellows in the middle position, limit its left and right displacement, click the test preparation button, and the control system will automatically adjust the tensile clamp to the contact state with the metal bellows according to the pipe diameter, and clear the displacement value at the same time.

[0037] When all the stretching fixtures are in contact with the metal bellows, and the human-computer interaction interface prompts that the experiment is ready, you can click on automatic run. The control system will send the bending radius control parameters corresponding to the selected pipe diameter to each servo driver, and then start the servo motor to execute the corresponding stretching position.

[0038] When the bellows is bent to a preset bending arc, the control system stops automatically and locks the clamp position through the speed reduction mechanism to keep the bellows in a bent state.

[0039] (III) Test execution: The grouting mechanism uses a water pump to fill the metal bellows with ordinary Portland cement slurry with a water-cement ratio of 0.50.

[0040] The observation organization observes the leakage situation on the surface of the metal bellows through a camera for 30 minutes.

[0041] (IV) End of the experiment and cleanup: When the bending holding time of the metal bellows is reached, the human-computer interaction interface will automatically prompt you to observe the surface leakage of the metal bellows. Then, based on the observed situation, the test results will be recorded.

[0042] After clicking the reset all button, the system automatically adjusts the fixture to the initial position, opens the lock, and removes the bellows that has completed the test.

[0043] The device in this embodiment is a fully automated design, which significantly improves the testing efficiency of metal bellows, reduces testing costs and human errors, and can adapt to the testing of metal bellows of various diameters. The device simplifies the operation process through an integrated design of bending, fixing, grouting, observation and recording. The device provides an efficient and accurate testing method for the building materials industry. At the same time, the wide applicability of the device will also promote its application and promotion in related fields.

Claims

1. A fully automatic metal bellows anti-leakage test device after bending, characterized in that: The device is composed of a bending mechanism, an auxiliary fixing mechanism and a control system. The bending mechanism comprises a base plate (11), a column (12), an upper fixed end (13), a lower fixed end (14) and a linear telescopic device (15); four casters (16) are arranged at the bottom of the base plate (11); the column (12) is vertically arranged on the base plate (11); the upper fixed end (13) is arranged on the right side of the column (12) away from the base plate (11), and the right end of the upper fixed end (13) is provided with an upper rolling shaft (131); the lower fixed end (14) is arranged on the right side of the column (12) close to the base plate (11), and the right end of the lower fixed end (14) is provided with a lower rolling shaft (141). There are a total of seven linear telescopic devices (15), which are horizontally arranged on the column (12) and evenly distributed between the upper fixed end (13) and the lower fixed end (14). The linear telescopic device (15) is composed of a servo motor (151), a servo reduction motor (152), a ball screw servo electric cylinder (153), an electric cylinder shaft (154) and a stretching clamp (155). The servo motor (151), the servo reduction motor (152) and the ball screw servo electric cylinder (153) are fixed to the left side of the column (12), the electric cylinder shaft (154) is located on the right side of the column (12), and the stretching clamp (155) is fixed to the right end of the electric cylinder shaft (154) and is used to clamp the metal bellows (4); The auxiliary fixing mechanism is used to fix the bent metal corrugated pipe, and comprises an upper attachment fixing device (21), an upper attachment clamping rod (22), a lower attachment fixing device (23), and a lower attachment clamping rod (24); the upper attachment fixing device (21) is mounted on the bottom of the upper fixing end (13); the left end of the upper attachment clamping rod (22) is mounted on the bottom of the upper attachment fixing device (21); the lower attachment fixing device (23) is mounted on the top of the lower fixing end (14); and the left end of the lower attachment clamping rod (24) is mounted on the top of the lower attachment fixing device (23); The control system is used to control the automated operation of the test process, control each servo motor (151) to drive the electric cylinder shaft (154) to execute a corresponding stretching distance, and control the servo reduction motor (152) to adjust the stretching fixture (155) to adapt to the diameter of the metal bellows, wherein the stretching distance is calculated based on a preset bending radius and chord length of the metal bellows.

2. The device according to claim 1, characterized in that The linear telescopic device further comprises an origin magnetic induction switch (156), an upper limit magnetic induction switch (157) and a lower limit magnetic induction switch (158); the origin magnetic induction switch (156) is used for initial position positioning of the main shaft of the linear telescopic device (15), and the upper limit magnetic induction switch (157) and the lower limit magnetic induction switch (158) are used for limiting the travel ends of the main shaft of the linear telescopic device (15).

3. The device according to claim 1, characterized in that The control system adopts PLC control.

4. The device according to claim 1, characterized in that The device also includes a human-computer interaction interface, which includes a pipe diameter selection interface, a screen parameter setting interface and a control parameter setting interface. The human-computer interaction interface is connected to the control system to transmit the setting parameters.

5. The device according to claim 1, characterized in that The stretching distance is calculated based on the preset bending radius and chord length of the metal bellows, specifically: The electric cylinder shaft of the linear telescopic device located between the upper fixed end (13) and the lower fixed end (14) is set as the central axis, and its displacement is: ； The electric cylinder axes of the other linear telescopic devices are distribution axes, and the displacement of each distribution axis is: ； In the formula, h is the displacement of the central axis, R is the preset bending radius of the metal bellows, L is the distance between the upper fixed end (13) and the lower fixed end (14), hn is the displacement of the distribution axis, and Ln is the distance between the distribution axis and the central axis.

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