Mpp pipe appearance defect detection equipment and use method

Abstract

The present application relates to pipe detection technical field, specifically, it relates to a kind of MPP pipe appearance defect detection equipment and use method.The detection equipment includes detection device, support frame and the conveying device located at the both sides of detection device outside, detection device feed end is provided with power device, several industrial cameras are arranged in the inside of detection device, the detection device at feed end and discharge end are all provided with support for pipe to be inserted, the inboard of discharge end support is fixedly provided with a handover ring, the both sides of the inner end of feed end support are all provided with guide mechanism.The end of pipe is abutted by abutment block, and the sinking of pipe is limited by the circular ring formed by two guide rings, and the pipe is guided to the handover ring, at the same time, the sleeve ring is pressed by the transverse movement of guide ring, the locking plate is forced to lock the locking member, the sinking end of pipe is supported and fixed by locking member, so as to avoid the sinking end of pipe to be inclined downward and be shielded, ensure sampling effect, improve detection accuracy.

Description

Technical Field

[0001] This invention relates to the field of pipe inspection technology, and more specifically, to an MPP pipe appearance defect inspection device and its usage method. Background Technology

[0002] With the development of technology, assembly lines are widely used in product manufacturing, especially in the production of plastic pipes. Injection molding machines are used to complete the initial injection molding of plastic pipes, and plastic granules are formed into plastic pipes through the injection molding process. However, during the injection molding process of plastic pipes, impurities may be mixed into the plastic granules, or the degree of melting of the plastic granules may be low, resulting in various defects on the surface of the molded plastic pipes. In more serious cases, varying degrees of wear may also occur on the surface of the pipes.

[0003] Chinese Patent Publication No. CN109406532A discloses a low-cost visual inspection device and method for surface defects in small-diameter pipes, applicable to the low-cost inspection of small-diameter plastic pipes. The visual inspection device has a housing containing a light source, an imaging device, a reflecting device, and a processing device. The light source provides illumination for imaging within the housing. The imaging device has a single imaging lens, which, in conjunction with the reflecting device, acquires partial images of the circumferential surface of the pipe under test, as well as other partial images of the circumferential surface reflected by the reflecting device. The processing device is signal-connected to the imaging lens and synthesizes and processes the acquired partial images to analyze and detect surface defects in the pipe under test.

[0004] When testing small-diameter pipes with large mass, because there is a certain distance between the inlet and outlet ends of the pipe, one end of the pipe will sink under the action of gravity. This means that the end of the pipe needs to be placed on the outlet end to prevent one end from sinking. However, this will cause part of the end of the pipe to be blocked and unable to be tested, thus affecting the test results. Summary of the Invention

[0005] This invention provides an MPP pipe appearance defect detection device. It uses an abutment block to hold the pipe end against the pipe, and two guide rings forming a ring to restrict the pipe's downward movement and guide it to the delivery ring. Simultaneously, the lateral movement of the guide rings applies pressure to the collar, forcing a locking plate to lock the locking element. The locking element supports and fixes the downward-sloping end of the pipe, thereby preventing the downward tilting and obstruction of the pipe end, thus solving the problems mentioned in the background art.

[0006] To achieve the above objectives, the MPP pipe appearance defect inspection equipment includes an inspection device, a support frame, and conveying devices located on both sides of the inspection device. A power unit is installed at the inlet end of the inspection device, and several industrial cameras are installed inside the inspection device. Both the inlet and outlet ends of the inspection device have supports for pipe insertion. A transfer ring is fixedly installed inside the outlet end support. Guide mechanisms are located on both sides of the inner end of the inlet end support. A drive unit is installed at the top of each guide mechanism, which can transport the guide mechanism along a preset trajectory to the outlet end support. The two guide mechanisms are responsible for abutting against the end of the inserted pipe and guiding the pipe to fit against the transfer ring. A locking mechanism is installed on the transfer ring, which abuts against the guide mechanism. The locking mechanism, in conjunction with the pressure applied by the guide mechanism, fixes the pipe close to the transfer ring and provides support to the pipe, thus limiting the sinking of the pipe end.

[0007] In the above technical solution, when the pipe to be tested passes through the feeding end conveying device, power device and support, the end of the pipe is inserted into the guiding mechanism and abuts against it. Then, under the coordinated action of the drive unit and the power device, the pipe is guided to the transfer ring until the guiding mechanism matches the transfer ring. During this process, the guiding mechanism applies pressure to the locking mechanism, forcing the locking mechanism to fix the end of the pipe and provide support for the pipe, thereby achieving support for the end of the pipe and preventing it from sinking downward and affecting the quality of the sampled photos.

[0008] The second objective of this invention is to provide a method for using an MPP pipe appearance defect inspection device, comprising the following steps:

[0009] S1. When the pipe to be tested passes through the feeding end conveying device, power device and support, the end of the pipe goes deep into the guiding mechanism and abuts against it. Then, under the coordinated action of the drive unit and the power device, the pipe is guided to the transfer ring until the guiding mechanism matches the transfer ring.

[0010] S2. The guiding mechanism applies pressure to the locking mechanism, forcing the locking mechanism to fix the end of the pipe and provide support for the pipe, thereby achieving support for the end of the pipe.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0012] The pipe end is held in place by the abutment block, and the two guide rings form a ring to restrict the pipe's descent and guide it to the delivery ring. At the same time, the lateral movement of the guide ring applies pressure to the collar, forcing the locking plate to lock the locking element. The locking element supports and fixes the descent end of the pipe, thereby preventing the descent end of the pipe from tilting downwards or being obstructed, ensuring sampling effect and improving detection accuracy. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0014] Figure 2 This is a schematic diagram of the detection device of the present invention;

[0015] Figure 3 This is a schematic diagram of the guiding mechanism and the handover ring structure of the present invention;

[0016] Figure 4 This is a schematic diagram of the industrial camera sampling method of the present invention;

[0017] Figure 5 This is a schematic diagram of the connection structure between the reverse lead screw and the bent rod of the present invention;

[0018] Figure 6 This is a three-dimensional structural diagram of the drive device and hydraulic rod of the present invention;

[0019] Figure 7 This is a schematic diagram of the guide ring cross-section structure of the present invention;

[0020] Figure 8 This is a schematic diagram of the bonding structure between the guide ring and the delivery ring of the present invention;

[0021] Figure 9 For the present invention Figure 8 Enlarged structural diagram at point A in the diagram;

[0022] Figure 10 This is a schematic diagram of the exploded structure of the collar and locking plate.

[0023] Figure 11 For the present invention Figure 10 Enlarged structural diagram at point A in the diagram

[0024] Figure 12 This is a schematic diagram of the internal structure of the transfer ring of the present invention.

[0025] The meanings of the labels in the diagram are as follows:

[0026] 100. Detection device; 101. Support frame; 102. Conveying device; 103. Power unit; 104. Industrial camera;

[0027] 110. Bracket; 111. Drive unit; 112. Hydraulic rod; 113. Reverse lead screw; 114. Bending rod;

[0028] 120. Guiding mechanism; 121. Guiding ring; 122. Abutting block; 123. Outer frame; 124. Inner plate; 125. First magnet; 126. Tension spring;

[0029] 130. Transfer ring;

[0030] 140. Locking mechanism; 141. Collar; 141a. Second magnet; 141b. Inclined plate; 141c. Top rod; 142. Locking plate; 142a. Baffle; 143. Locking element; 143a. Frame; 144. Return spring; 145. Traction spring. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] When inspecting small-diameter, high-mass pipes, due to the distance between the inlet and outlet ends, one end of the pipe will sink under gravity. This necessitates placing the pipe end against the outlet end to prevent sinking. However, this obstructs the inspection of the pipe end, affecting the results. This invention provides an MPP pipe appearance defect inspection device. (See attached image) Figures 1-4 As shown, the device includes a detection device 100, a support frame 101, and conveying devices 102 located on both sides of the detection device 100. A power unit 103 is provided at the feed end of the detection device 100 to provide power for conveying the pipe to be tested. Several industrial cameras 104 are installed inside the detection device 100. Both the feed end and the discharge end of the detection device 100 have brackets 110 for the pipe to pass through. A transfer ring 130 is fixedly installed inside the discharge end bracket 110. Guide mechanisms 120 are located on both sides of the inner end of the feed end bracket 110. A drive unit is provided at the top of the guide mechanism 120, which can drive the guide mechanism 120 along a preset track. The material is conveyed to the discharge end support 110. When the end of the pipe passes through the feed end support 110, the two side guide mechanisms 120 are responsible for abutting against the end of the pipe and guiding the pipe to fit against the transfer ring 130. The transfer ring 130 is provided with a locking mechanism 140 that abuts against the guide mechanism 120. With the pressure applied by the guide mechanism 120, the locking mechanism 140 fixes the pipe close to the transfer ring 130 and supports the pipe to limit the end of the pipe from sinking. Then the guide mechanism 120 withdraws from the pipe to prevent interference with the shooting effect of the industrial camera 104. The industrial camera 104 samples the surface of the pipe to ensure the sampling effect and improve the detection accuracy.

[0033] The working principle described above is as follows: When the pipe to be tested passes through the feed end conveying device 102, the power device 103, and the support 110, the end of the pipe penetrates into and abuts against the guiding mechanism 120. Then, under the coordinated action of the drive unit and the power device 103, the pipe is guided towards the transfer ring 130 until the guiding mechanism 120 and the transfer ring 130 are engaged. During this process, the guiding mechanism 120 applies pressure to the locking mechanism 140, forcing the locking mechanism 140 to fix the end of the pipe (i.e., the lower end of the pipe) and provide support for the pipe, thereby supporting the end of the pipe and preventing it from sinking downwards and affecting the quality of the sampled images. The specific working principle of pipe testing is explained in detail below:

[0034] First, such as Figure 3 , Figure 5 As shown, the drive unit includes a drive unit 111 slidably disposed inside the detection device 100, and a hydraulic rod 112 fixedly disposed outside the detection device 100. The telescopic end of the hydraulic rod 112 is fixed to the drive unit 111 and used to reciprocate to pull it for lateral movement. The drive unit 111 is used to rotate the reverse screw 113 connected to it. The distal end of the reverse screw 113 is slidably connected to the detection device 100 in the lateral direction. On the other hand, a bent rod 114 is threadedly connected to the reverse screw 113. The other end of the bent rod 114 is connected to the guide mechanism 120, and a balance rod is slidably connected to the bent rod 114. One end of the balance rod is rotatably connected to the reverse screw 113, and the other end is fixed to the drive unit 111. Therefore, when the pipe to be tested is inserted into the support 110 at the feed end, the drive unit 111 is activated to drive the reverse screw 113 to rotate according to the size of the pipe. The rotation of the reverse screw 113 drives the bent rod 114 to move longitudinally (wherein, the lateral movement is referenced). Figure 3 As shown by the middle arrow, move the reference vertically. Figure 5 (As shown by the middle arrow) moves, while the bent rod 114 remains stable under the action of the balance bar, limiting the deviation of the bent rod 114. During this stage, the bent rods 114 on both sides drive the guiding mechanism 120 to retract inward, thereby clamping the end of the pipe until the two guiding mechanisms 120 on both sides match and cover the end of the pipe.

[0035] Next, based on the above diagram and in conjunction with Figure 6As shown, the specific structure of the guiding mechanism 120 is described. The guiding mechanism 120 includes a guiding ring 121 that fits against the support 110. The guiding ring 121 is semi-circular and, together with another guiding ring 121, wraps around the end of the pipe. The inner diameter of the guiding ring 121 is the same as the outer diameter of the pipe to limit the sinking of the pipe end. When moving towards the discharge end, it guides the pipe to the receiving ring 130. That is, the pipe passes through the support 110 and enters the two matching guiding rings 121. The inner wall of the guiding ring 121 is fixedly provided with an abutment block 122 protruding towards the central axis. When the pipe passes through the support 110 and enters the ring where the two matching guiding rings 121 fit together, the end of the pipe contacts the abutment block 122. The abutment block 122 can hold the end of the pipe in place when it enters the guiding ring 121 to limit the pipe from over-insertion (see reference). Figure 7 (as shown)

[0036] Then, the power unit 103 continues to deliver the pipe into the detection device 100. Simultaneously, the hydraulic rod 112 retracts, causing the drive unit 111 to move towards the discharge end. That is, the guide ring 121 moves synchronously with the pipe to the receiving ring 130. Just as the guide ring 121 is about to contact the receiving ring 130, reference... Figure 8 , Figure 9 , Figure 10 , Figure 11 As shown, since the inner diameters of the guiding mechanism 120 and the receiving ring 130 are the same, the locking mechanism 140 includes a collar 141 movably disposed on the outer ring of the receiving ring 130. Several inclined plates 141b are fixedly disposed on the inner side of the collar 141. The inclined plates 141b have a pointed tip in the middle and inclined surfaces on both sides. A push rod 141c is fixedly connected between the inclined plates 141b and the collar 141. The push rod 141c is slidably connected to the receiving ring 130. In addition, the locking mechanism 140 also includes a locking plate 142 slidably disposed on the receiving ring 130. A baffle 142a is fixedly disposed at one end of the locking plate 142. A traction spring 145 is elastically connected between the baffle 142a and the receiving ring 130. There is a spacing between adjacent baffles 142a to accommodate the tip of the inclined plate 141b.

[0037] In this way, when the collar 141 moves to one side under external pressure, the collar 141 and the inclined plate 141b move synchronously. The tip of the inclined plate 141b gradually penetrates into the gap between the two side baffles 142a. The inclined surfaces on both sides of the inclined plate 141b overcome the elastic potential energy of the traction spring 145 to drive the adjacent locking plates 142 to move relative to each other until the guide ring 121 and the collar 141 are in contact with each other, and the locking plate 142 stops moving. During this process, since the connecting ring 130 at the end of the locking plate 142 away from the baffle 142a has a notch, a locking member 143 for supporting and fixing the pipe is provided in the notch. The frame 143a connected to the locking member 143 is fixed to the connecting ring 130. When the fixing of the pipe is released, the notch is used to accommodate the locking member 143 for flipping.

[0038] Combination Figure 12 As shown, under normal conditions, the locking member 143 has a vertical end and a horizontal end. The vertical end is elastically connected to the inner wall of the notch with a return spring 144. The horizontal end is smooth to allow the inner wall of the pipe to slide in smoothly. The horizontal end is also provided with a ball to reduce the friction between the horizontal end and the outer wall of the pipe when the locking member 143 is flipped. The state of the locking member 143 after flipping is shown by the dotted line in the figure. At this time, the return spring 144 is in a stretched state.

[0039] Return to Figure 7 , Figure 8 , Figure 9 As shown, a second magnet 141a is symmetrically arranged on the side of the collar 141 near the feed end. The second magnet 141a is magnetically engaged with a first magnet 125. The first magnet 125 is located outside the second magnet 141a and is fixedly disposed at the end of the inner plate 124. The inner plate 124 is slidably disposed within the outer frame 123. Figure 9 The inner plate 124 has a slider (shown in the diagram), the inner plate 124 is fixed to the guide ring 121, and a tension spring 126 is elastically connected between the inner plate 124 and the outer frame 123; Working principle:

[0040] When the guide ring 121 approaches the receiving ring 130, the first magnet 125 first contacts the collar 141. When the first magnet 125 and the second magnet 141a are in contact... Figure 9 In the state shown, the guide ring 121 continues to move toward the transfer ring 130. At this time, the first magnet 125 and the second magnet 141a are attracted to each other. The first magnet 125 applies pressure to the collar 141, causing it to move toward the discharge end, thereby pushing the collar 141 out. That is, the collar 141 and the inclined plate 141b move synchronously. The end of the locking member 143 pushes against the locking member 143, thereby restricting the locking member 143 from rotating counterclockwise.

[0041] Furthermore, after the locking member 143 fixes the end of the pipe, the two guide rings 121 on both sides move relative to each other, that is... Figure 8 The tube moves in the direction indicated by the middle arrow, and the two guide rings 121 separate from the tube. In this state, the first magnet 125 is still attracted to the second magnet 141a (at this time, the elastic potential energy of the tension spring 126 is less than the attraction between the first magnet 125 and the second magnet 141a). The end of the tube is located outside the transfer ring 130 and will not cause obstruction. Then, a photo is taken. After the photo is taken, the two guide rings 121 continue to move relative to each other, forcing the elastic potential energy of the tension spring 126 to be greater than the attraction between the first magnet 125 and the second magnet 141a. The first magnet 125 and the second magnet 141a separate, the locking member 143 is released, the guide ring 121 is reset, and then the tube continues to move towards the discharge end, pushing the locking member 143 open. After being pushed open, the ball at the horizontal end of the locking member 143 rolls on the tube, thereby reducing the friction between the locking member and the tube.

[0042] In other words, the end of the pipe is held in place by the abutment block 122, and the ring formed by the two guide rings 121 restricts the sinking of the pipe and guides the pipe to the delivery ring 130. At the same time, the lateral movement of the guide ring 121 applies pressure to the collar 141, forcing the locking plate 142 to lock the locking member 143. The locking member 143 supports and fixes the sinking end of the pipe, thereby preventing the sinking end of the pipe from tilting downward and being blocked, ensuring the sampling effect and improving the detection accuracy.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An MPP pipe appearance defect detection device, characterized in that: The device includes a detection device (100), a support frame (101), and conveying devices (102) located on both sides of the detection device (100). A power unit (103) is installed at the feed end of the detection device (100). Several industrial cameras (104) are installed inside the detection device (100). Both the feed end and the discharge end of the detection device (100) have brackets (110) for pipes to pass through. A transfer ring (130) is fixedly installed inside the discharge end bracket (110). Guide mechanisms (120) are located on both sides of the inner end of the feed end bracket (110). The top of the feeding mechanism (120) is provided with a driving unit, which can transport the feeding mechanism (120) along a preset trajectory to the discharge end support (110). The two side feeding mechanisms (120) are responsible for abutting against the end of the inserted pipe and guiding the pipe to fit against the transfer ring (130). The transfer ring (130) is provided with a locking mechanism (140) that abuts against the feeding mechanism (120). With the pressure applied by the feeding mechanism (120), the locking mechanism (140) fixes the pipe close to the transfer ring (130) and supports the pipe to limit the sinking of the pipe end. The guiding mechanism (120) includes a guiding ring (121) that fits against the bracket (110). The guiding ring (121) is semi-circular and, together with another guiding ring (121), is wrapped around the end of the pipe. The inner diameter of the guiding ring (121) is the same as the outer diameter of the pipe to limit the sinking of the pipe end. When moving towards the discharge end, the pipe is guided to the handover ring (130). The transfer ring (130) has a notch, in which a locking element (143) is provided for supporting and fixing the pipe. After the locking element (143) fixes the end of the pipe, the two guide rings (121) on both sides separate from the pipe.

2. The MPP pipe appearance defect detection equipment according to claim 1, characterized in that: The drive unit includes a drive device (111) slidably disposed inside the detection device (100) and a hydraulic rod (112) fixedly disposed outside the detection device (100). The telescopic end of the hydraulic rod (112) is fixed to the drive device (111) and used to reciprocate to pull it to make lateral movement. The drive device (111) is used to rotate the reverse screw (113) connected to it. The distal end of the reverse screw (113) is slidably connected to the detection device (100) in the lateral direction.

3. The MPP pipe appearance defect detection equipment according to claim 2, characterized in that: A bent rod (114) is threaded onto the reverse lead screw (113). The other end of the bent rod (114) is connected to the guide mechanism (120), and a balance rod is slidably connected to the bent rod (114). One end of the balance rod is rotatably connected to the reverse lead screw (113), and the other end is fixed to the drive device (111).

4. The MPP pipe appearance defect detection equipment according to claim 1, characterized in that: The inner wall of the guide ring (121) is fixedly provided with an abutment block (122) protruding towards the central axis. The abutment block (122) can hold the end of the pipe in place when the end of the pipe is inserted into the guide ring (121) to limit the excessive insertion of the pipe.

5. The MPP pipe appearance defect detection equipment according to claim 1, characterized in that: The guiding mechanism (120) has the same inner diameter as the receiving ring (130). The locking mechanism (140) includes a collar (141) movably disposed on the outer ring of the receiving ring (130). Several inclined plates (141b) are fixedly disposed on the inner side of the collar (141). The inclined plates (141b) have a pointed tip in the middle and inclined surfaces on both sides. A top rod (141c) is fixedly connected between the inclined plates (141b) and the collar (141). The top rod (141c) is slidably connected to the receiving ring (130).

6. The MPP pipe appearance defect detection equipment according to claim 5, characterized in that: The locking mechanism (140) further includes a locking plate (142) slidably disposed on the transfer ring (130). A baffle (142a) is fixedly disposed on one end of the locking plate (142). A traction spring (145) is elastically connected between the baffle (142a) and the transfer ring (130). There is a gap between adjacent baffles (142a) to accommodate the tip of the inclined plate (141b).

7. The MPP pipe appearance defect detection equipment according to claim 6, characterized in that: The hand-connecting ring (130) at one end of the locking plate (142) away from the baffle (142a) has a notch, and the frame (143a) rotatably connected to the locking member (143) is fixed to the hand-connecting ring (130). When the fixing of the pipe is released, the notch is used to accommodate the locking member (143) to be flipped. Under normal conditions, the locking element (143) has a vertical end and a horizontal end. The vertical end is elastically connected to the inner wall of the notch with a return spring (144). The horizontal end is smooth to allow the inner wall of the pipe to slide in smoothly, and the horizontal end is also provided with a ball bearing.

8. The MPP pipe appearance defect detection equipment according to claim 5, characterized in that: A second magnet (141a) is symmetrically arranged on the side of the collar (141) near the feed end. The second magnet (141a) is magnetically coupled with a first magnet (125). The first magnet (125) is located outside the second magnet (141a). The first magnet (125) is fixedly arranged at the end of the inner plate (124). The inner plate (124) is slidably arranged inside the outer frame (123). The inner plate (124) is fixed to the guide ring (121), and a tension spring (126) is elastically connected between the inner plate (124) and the outer frame (123).

9. A method of using the MPP pipe appearance defect inspection equipment described in claim 1, characterized in that, The methods and steps include the following: S1. When the pipe to be tested passes through the feed end conveying device (102), power device (103) and support (110), the end of the pipe penetrates into the guide mechanism (120) and abuts against it. Then, under the coordinated action of the drive unit and the power device (103), the pipe is guided to the transfer ring (130) until the guide mechanism (120) matches the transfer ring (130). S2. The guiding mechanism (120) applies pressure to the locking mechanism (140), forcing the locking mechanism (140) to fix the end of the pipe and provide support for the pipe, thereby achieving support for the end of the pipe.

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