CN112014040A - Equipment and method for air tightness leakage detection of pipe - Google Patents

Abstract

The invention discloses equipment and a method for detecting air tightness of pipes, and the equipment and the method comprise a support body, wherein a glass water tank is arranged in the support body, a blanking frame is arranged on one side of the support body, a moving mechanism, a lifting mechanism and a pipe supporting mechanism are arranged in the support body, a caliper of the equipment is a thin panel, the quality is light, the equipment is convenient to carry, a clamping mechanism can independently grab and release the pipes, the lifting mechanism can drive the clamping mechanism to reach the position required by grabbing and releasing the pipes, the lifting mechanism can adjust the position through the moving mechanism, the air tightness detecting mechanism inflates and seals the pipes, and the pipe supporting frame is immersed into the water under the action of a second electric cylinder, so that the air tightness detecting operation is completed.

Description

A device and method for leak detection of air tightness of pipes

technical field

The invention relates to the field of air tightness detection of pipes, in particular to a device and a method for leak detection of air tightness of pipes.

Background technique

Pipes are widely used, and for welded pipes, air tightness testing is required after welding. In the existing pipeline air-tightness test, after the operator plugs one end of the pipeline into the plug by hand, the other end of the pipeline is fed with high-pressure gas. After immersing the pipe in water, the operator observes whether there are air bubbles at the welding position of the pipeline. During the entire air tightness test, the product is in a high pressure state. If the plug is not tightly connected to the pipe, the pipe will pop out, which will easily cause injury to the operator. The detection efficiency of this single pipe is low, so the need for automatic management and control is particularly important for the simultaneous detection of multiple pipes.

SUMMARY OF THE INVENTION

The purpose of the present invention is to solve the above-mentioned technical problems, and to provide a device and method for leak detection of air tightness of pipes. By adopting an automatic detection method, the air tightness detection of multiple pipes can be performed at the same time, and the work efficiency of detection is high. .

The technical solution adopted by the present invention to solve the above-mentioned technical problems is a device for leak detection of air tightness of pipes, which includes a bracket body, a glass water tank is installed in the bracket body, and a blanking frame is installed on one side of the bracket body, and the bracket body is installed. The body is provided with a moving mechanism, a lifting mechanism, and a trustee mechanism;

The moving mechanism includes a screw drive mechanism driven by a first servo motor, and the screw drive mechanism drives the lifting mechanism to move back and forth from above the glass water tank to the top of the blanking rack;

The lifting mechanism includes a first electric cylinder, the head end of the first electric cylinder is connected with a clamping mechanism, the first electric cylinder controls the lifting work of the clamping mechanism, and the clamping mechanism cooperates with the custody mechanism to complete the grasping of the pipe. put work;

The clamping mechanism includes a second servo motor. The second servo motor drives the left panel through a worm. The left panel and the right panel that move back and forth cooperate with each other. The clamping part realizes the pick and place of a single pipe;

The escrow mechanism includes a stinger frame located above the glass water tank, and a second electric cylinder is installed at both ends of the escrow frame to control its lifting operation. The escrow frame is also provided with two air tightness detection mechanisms acting on both ends of the pipe to be inspected;

The airtight detection mechanism includes a plug, one end of the plug is matched with the port of the pipe to be inspected, and the other end of the plug is connected with high-pressure gas, and is connected with a driving cylinder to control the movement of the driving plug.

As a preferred structure, the lifting mechanism further includes two guide columns located on both sides of the first electric cylinder and arranged in parallel with the first electric cylinder.

As a preferred structure, the lifting mechanism is provided in at least two places.

As a preferred structure, the blanking frame is provided with a movable stop lever.

The present invention also provides a method for leak detection of air tightness of pipes, comprising the following steps:

Step 1: Complete the grasping work of the pipe to be inspected. The second servo motor in the clamping mechanism drives the left panel to move relative to the right panel through the worm, and each clamping part on the left panel corresponds to each clamping part on the right panel. Close to each other to complete the clamping of the pipe to be tested;

Step 2: After completing the preparation of the pipe to be tested, the lead screw drive mechanism driven by the first servo motor in the moving mechanism moves, so that the lifting mechanism that moves with it returns to the top of the glass water tank;

Step 3: Complete the placement of the pipe to be tested, the ejector rod of the first electric cylinder in the lifting mechanism is ejected, and the clamping mechanism installed at the ejector rod is driven to descend. When the pipe to be tested contacts the stinger, the clamp The mechanism completes the release operation;

Step 4: Complete the leak detection of the pipe to be tested. After the pipe to be tested is placed on the stinger, the plug in the air tightness detection mechanism is driven by the driving cylinder to block both ends of the pipe to be tested, and then fill with gas. And under the driving of the second electric cylinder, immerse the pipe to be tested under the glass water tank, until the water in the glass water tank remains in a static state, and observe whether there are bubbles;

Step 5: Complete the classification of the tested pipes, the stinger rises to the top of the glass water tank, the clamping mechanism completes the grasping of the tested pipes, and the screw drive mechanism in the moving mechanism works, moves to the top of the blanking rack, and loosens it. The clamp-opening mechanism completes the work of blanking, in which there is no leakage of the pipe during the detection process, the movable stopper in the blanking rack is raised, and the pipe is normally rolled down to the qualified product storage rack. The movable stop bar is lowered, and the pipe rolls down to the waste staging rack.

The beneficial effects of the caliper of the present invention are as follows: the structural design of the present invention is reasonable, the moving mechanism, the lifting mechanism and the trustee mechanism cooperate with each other, the clamping mechanism is responsible for the grasping and releasing of the pipe, and the airtight detection mechanism is responsible for inflating the pipe and blocking the port, In order to complete the purpose of pipe inspection.

The air tightness detection method of the pipe of the present invention uses the clamping mechanism to pick and place the pipe independently, and the lifting mechanism can drive the clamping mechanism to reach the position required for picking and placing the pipe, and the lifting mechanism adjusts the position through the moving mechanism. The air tightness detection mechanism inflates and seals the pipes, and under the action of the second electric cylinder, the stinger is immersed in the water surface, wherein the clamping mechanism is provided with at least one clamping part, which can detect multiple pipes at the same time. This method detects The working efficiency of the pipe is high.

Description of drawings

Fig. 1 shows the three-dimensional structure schematic diagram of the device of the present invention;

Figure 2 shows a schematic plan view of the device of the present invention;

FIG. 3 is a schematic view of the enlarged structure of A in FIG. 1 .

Reference numerals: 1, bracket body; 2, glass water tank; 3, first electric cylinder; 4, second servo motor; 5, left panel; 6, right panel; 7, stinger; 8, plug; 11, The first servo motor; 12, the second electric cylinder; 13, the movable lever; 14, the blanking frame; 15, the guide column.

Detailed ways

In order to deepen the understanding of the present invention, the present invention will be further described in detail below with reference to the embodiments and the accompanying drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

As shown in Figures 1 to 3, a device for leak detection of pipe air-tightness includes a bracket body 1, a glass water tank 2 is installed in the bracket body 1, and a blanking frame 14 is installed on one side of the bracket body 1, and the material is blanked. There is a movable lever 13 at the rack 14. The movable lever 13 is raised so that the pipe can be normally rolled to the qualified product storage rack. If there is a leakage of the pipe, the movable lever 13 can be lowered to make the pipe roll down. to the waste storage rack.

The bracket body 1 is provided with a moving mechanism, a lifting mechanism, and a trustee mechanism; wherein the moving mechanism includes a lead screw drive mechanism driven by the first servo motor 11, and the lead screw drive mechanism converts the rotational motion of the first servo motor 11 into linear motion, The screw drive mechanism drives the lifting mechanism to move back and forth from the top of the glass water tank 2 to the top of the blanking rack 14 .

The lifting mechanism includes a first electric cylinder 3, the head end of the ejector rod of the first electric cylinder 3 is connected with a clamping mechanism, the first electric cylinder 3 controls the lifting work of the clamping mechanism, and the first electric cylinder 3 can push the clamping mechanism to the A suitable position in order to cooperate with the escrow mechanism to complete the pick-and-place work of the pipe. The lifting mechanism also includes two guide columns 15 located on both sides of the first electric cylinder 3 and arranged in parallel with the first electric cylinder 3. The arrangement of the guide columns 15 can improve the working stability of the lifting clamp mechanism.

The length of the pipe is long, and at least two clamping mechanisms are set on one pipe, so as to ensure the stability of the pipe picking and placing process. Each clamping mechanism corresponds to a lifting mechanism, so there are at least two lifting mechanisms.

The clamping mechanism includes a second servo motor 4, the second servo motor 4 drives the left panel through a worm, the left panel 5 and the right panel 6 that move back and forth cooperate with each other, and at least one clamping portion is provided on the left panel 5, and is connected with the right panel. The corresponding clamping part on 6 realizes the pick and place of a single pipe.

The escrow mechanism includes a stinger 7 located above the glass water tank 2. A second electric cylinder 12 is installed at both ends of the stinger 7 to control its lifting and lowering. The stinger 7 is also provided with two air acting on both ends of the pipe to be inspected. The airtight detection mechanism includes a plug 8, one end of the plug 8 is matched with the port of the pipe to be inspected, and the other end is connected to high-pressure gas, and is connected to the driving cylinder to control the movement of the driving plug 8.

A method for leak detection of air tightness of pipes, comprising the following steps:

Step 1: Complete the grasping work of the pipe to be inspected. The second servo motor 4 in the clamping mechanism drives the left panel to move relative to the right panel through the worm, and each clamping part on the left panel corresponds to each clamping on the right panel. The parts are close to each other to complete the clamping of the pipe to be tested;

Step 2: After completing the preparation of the pipe to be tested, the lead screw drive mechanism driven by the first servo motor 11 in the moving mechanism moves, so that the lifting mechanism that moves with it returns to the top of the glass water tank 2;

Step 3: The placement of the pipe to be tested is completed, the ejector rod of the first electric cylinder 3 in the lifting mechanism is ejected, and the clamping mechanism installed at the ejector rod is driven to descend. When the pipe to be tested contacts the stinger 7, The clamp mechanism completes the loosening operation;

Step 4: Complete the leak detection of the pipe to be tested. After the pipe to be tested is placed on the stinger 7, the plug 8 in the air tightness detection mechanism is driven by the driving cylinder to block both ends of the pipe to be tested, and fill it with gas, and under the driving of the second electric cylinder 12, immerse the pipe to be tested under the glass water tank 2, until the water in the glass water tank 2 remains in a static state, and observe whether there are bubbles;

Step 5: Complete the classification of the tested pipes, the stinger 7 rises above the glass water tank 2, the clamping mechanism completes the grasping of the tested pipes, and the lead screw transmission mechanism in the moving mechanism works to move to the blanking rack 14. Above, loosen the clamp mechanism to complete the work of blanking, in which there is no leakage of the pipe during the detection process, then the movable stopper 13 in the blanking rack 14 is raised, and the pipe is normally rolled down to the qualified product storage rack. If the pipe leaks, Then, the movable blocking rod 13 in the blanking rack 14 is lowered, and the pipe material rolls down to the waste temporary storage rack.

Claims (5)

1. a device for leak detection of pipe air tightness, comprising a support body, a glass water tank is installed in the support body, and a blanking rack is installed on one side of the support body, it is characterized in that: the support body is provided with a moving mechanism, Lifting mechanism, trustee agency; The moving mechanism includes a screw drive mechanism driven by a first servo motor, and the screw drive mechanism drives the lifting mechanism to move back and forth from above the glass water tank to the top of the blanking rack; The lifting mechanism includes a first electric cylinder, the head end of the first electric cylinder is connected with a clamping mechanism, the first electric cylinder controls the lifting work of the clamping mechanism, and the clamping mechanism cooperates with the custody mechanism to complete the grasping of the pipe. put work; The clamping mechanism includes a second servo motor. The second servo motor drives the left panel through a worm. The left panel and the right panel that move back and forth cooperate with each other. The clamping part realizes the pick and place of a single pipe; The escrow mechanism includes a stinger frame located above the glass water tank, and a second electric cylinder is installed at both ends of the escrow frame to control its lifting operation. The escrow frame is also provided with two air tightness detection mechanisms acting on both ends of the pipe to be inspected; The airtight detection mechanism includes a plug, one end of the plug is matched with the port of the pipe to be tested, and the other end of the plug is connected with high-pressure gas, and is connected with a driving cylinder to control the movement of the driving plug. 2 . The device for leak detection of pipe air tightness according to claim 1 , wherein the lifting mechanism further comprises two guides located on both sides of the first electric cylinder and parallel to the first electric cylinder. 3 . column. 3 . The device for leak detection of air tightness of pipes according to claim 1 , wherein the lifting mechanism is provided at least two places. 4 . 4 . The device for leak detection of pipe air tightness according to claim 1 , wherein a movable stop rod is arranged at the blanking frame. 5 . 5. A method for leak detection of pipe air tightness according to any one of claims 1-4, characterized in that: comprising the following steps: Step 1: Complete the grasping work of the pipe to be inspected. The second servo motor in the clamping mechanism drives the left panel to move relative to the right panel through the worm, and each clamping part on the left panel corresponds to each clamping part on the right panel. Close to each other to complete the clamping of the pipe to be tested; Step 2: After completing the preparation of the pipe to be tested, the lead screw drive mechanism driven by the first servo motor in the moving mechanism moves, so that the lifting mechanism that moves with it returns to the top of the glass water tank; Step 3: Complete the placement of the pipe to be tested, the ejector rod of the first electric cylinder in the lifting mechanism is ejected, and the clamping mechanism installed at the ejector rod is driven to descend. When the pipe to be tested contacts the stinger, the clamp The mechanism completes the release operation; Step 4: Complete the leak detection of the pipe to be tested. After the pipe to be tested is placed on the stinger, the plug in the air tightness detection mechanism is driven by the driving cylinder to block both ends of the pipe to be tested, and then fill with gas. And under the driving of the second electric cylinder, immerse the pipe to be tested under the glass water tank, until the water in the glass water tank remains in a static state, and observe whether there are bubbles; Step 5: Complete the classification of the tested pipes, the stinger rises to the top of the glass water tank, the clamping mechanism completes the grasping of the tested pipes, and the screw drive mechanism in the moving mechanism works, moves to the top of the blanking rack, and loosens it. The clamp-opening mechanism completes the work of blanking, in which there is no leakage of the pipe during the detection process, the movable stopper in the blanking rack is raised, and the pipe is normally rolled down to the qualified product storage rack. The movable stop bar is lowered, and the pipe rolls down to the waste staging rack.

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