A heat shrink sleeve optical inspection apparatus

Abstract

The utility model discloses a kind of heat shrinkable sleeve optical detection equipment, belong to heat shrinkable sleeve detection technical field.The device includes base and high-precision camera, high-precision camera is fixed on the top of base by support, the device further includes adjustable mounting mechanism and fixed mounting mechanism set on base, fixed joint is fixedly arranged on adjustable mounting mechanism and fixed mounting mechanism, two groups of fixed joint are close to one side and can be detachably mounted with mould pipe, one group of fixed joint is set with first flow tube on the side away from mould pipe, and another group of fixed joint is set with second flow tube on the side away from mould pipe.The utility model is in use, inject fluid to first flow tube, if heat shrinkable sleeve and mould pipe are sealed well, fluid cannot flow out from both ends of heat shrinkable sleeve;If sealing is not strict, then there will be fluid exudation.This detection mode is simple and intuitive, guarantee the accuracy and reliability of detection.

Description

Technical Field

[0001] This utility model relates to the field of heat shrink tubing inspection technology, and in particular to an optical inspection device for heat shrink tubing. Background Technology

[0002] Heat shrink tubing is commonly used for insulation protection, sealing, and moisture prevention of wires and cables. Heat shrink tubing testing involves a series of operations to assess the quality of heat shrink tubing products. Testing covers multiple aspects, including visual inspection to check for surface smoothness, bubbles, cracks, and other defects; performance testing, including heat shrinkage performance to verify that the tubing shrinks uniformly to the specified dimensions after heating; and electrical performance, such as insulation resistance and withstand voltage, to ensure reliable insulation and electrical safety during use.

[0003] Optical inspection of heat shrink tubing is a technique that utilizes optical principles and equipment to inspect the quality of heat shrink tubing. It acquires image information of the tubing through an optical imaging system and analyzes various features on the tubing surface using image processing algorithms. This process detects surface defects such as scratches, stains, and uneven coloring, and also checks whether the tubing dimensions meet standards, such as uniform wall thickness and whether the shrunk diameter meets specifications.

[0004] In cable-related operations, heat shrink tubing is commonly used to wrap cable joints, fulfilling the important responsibilities of insulation, sealing, and protection. However, a thorny problem arises in practical use: when heat shrink tubing is heated to a specific temperature, some tubing fails to seal properly. Poor sealing allows external moisture and dust to intrude, threatening the safe operation of the cable. Therefore, sampling and testing of heat shrink tubing is necessary before it is put into storage. While the optical inspection equipment used for heat shrink tubing can inspect its appearance, dimensions, and shrinkage rate, it is not suitable for checking the airtightness after heat shrinking. Utility Model Content

[0005] This invention provides an optical inspection device for heat shrink tubing, which can solve the problem that existing optical inspection devices for heat shrink tubing, although capable of inspecting the appearance, size, and shrinkage rate of the tubing, cannot meet the requirements for airtightness inspection after heat shrinking.

[0006] An optical inspection device for heat shrink tubing includes a base and a high-precision camera. The high-precision camera is fixed above the base by a bracket. The device also includes an adjustable mounting mechanism and a fixed mounting mechanism disposed on the base. Both the adjustable mounting mechanism and the fixed mounting mechanism are fixedly provided with fixed joints. A mold tube can be detachably installed on the side of each of the two sets of fixed joints that is close to the mold tube. A first flow tube is provided on the side of one set of fixed joints away from the mold tube, and a second flow tube is provided on the side of the other set of fixed joints away from the mold tube. The first flow tube, the second flow tube, the two sets of mold tubes, and the two sets of fixed joints are all internally interconnected.

[0007] As a further embodiment of this utility model: the adjustable installation mechanism includes a lateral displacement adjustment component fixedly mounted on the base, and a sliding block that is fitted onto the lateral displacement adjustment component, and a set of fixed joints fixed to the sliding block.

[0008] As a further embodiment of this utility model: the fixed installation mechanism includes an electromagnetic vibrator fixedly mounted on the base, the output end of the electromagnetic vibrator is fixedly connected to a connecting plate, and a set of fixed joints are fixed to the connecting plate.

[0009] As a further embodiment of this utility model: each set of fixed joints includes an outer sleeve, the outer sleeve has a conveying channel in the middle that slides with the mold tube, the outer sleeve has a threaded positioning hole on the side that communicates with the conveying channel, and a positioning bolt is threadedly connected inside the threaded positioning hole; one set of outer sleeves is fixedly connected to the connecting plate, and the other set of outer sleeves is fixedly connected to the sliding block.

[0010] As a further embodiment of this utility model: the lateral displacement adjustment component includes a first slide rail fixedly mounted on the base, a movable box slidably fitted on the first slide rail, and a sliding block fitted inside the movable box; a threaded rotating component is distributed and rotatably mounted on the inner side of the first slide rail, and the threaded rotating component is threadedly connected to the movable box.

[0011] As a further embodiment of this utility model: the sliding block is slidably fitted inside the movable box, and a fine-tuning knob is threadedly connected to the front end of the movable box. The fine-tuning knob is threaded through the front end of the movable box and is rotatably connected to the sliding block.

[0012] As a further embodiment of this utility model: a heat-drying tubing machine for heating the heat-shrink tubing is provided on one side of the base.

[0013] As a further embodiment of this utility model: a slide rail is provided on one side of the base, which slides in cooperation with the bottom of the tube drying machine.

[0014] As a further embodiment of this utility model, each group of mold tubes is provided with a support body with a large radius at its front end.

[0015] As a further embodiment of this utility model, the side of the mold tube is provided with a positioning groove that cooperates with the positioning bolt.

[0016] The beneficial effects of this utility model are:

[0017] 1. In use, fluid is injected into the first flow tube. If the heat shrink sleeve and the mold tube are well sealed, the fluid will not flow out from both ends of the heat shrink sleeve; if the seal is not tight, fluid will leak out. This detection method is simple and intuitive, judging the sealing performance by the fluid flow state, ensuring the accuracy and reliability of the detection.

[0018] 2. After testing, the electromagnetic vibrator in the fixed installation mechanism of this invention drives the connecting plate and the fixed joint to vibrate laterally at high frequency, thereby causing the mold tube to vibrate. Because the heat shrink sleeve is flexible and elastic, it will displace and deform under the vibration, thus partially and automatically detaching from the mold tube. This process avoids laborious manual disassembly, saves time and labor costs, simplifies the cleaning process, improves work efficiency, and makes the entire testing process more efficient and convenient. Attached Figure Description

[0019] Figure 1 A schematic diagram of the structure of a heat-shrinkable sleeve optical inspection device during heat drying, provided by this utility model;

[0020] Figure 2 A schematic diagram of the structure of an optical inspection device for heat shrink tubing provided by this utility model during inspection;

[0021] Figure 3 A schematic diagram of the adjustable mounting mechanism and the fixed mounting mechanism of the optical inspection equipment for heat shrink tubing provided by this utility model;

[0022] Figure 4 A cross-sectional structural diagram of an adjustable mounting mechanism and a fixed mounting mechanism for a heat shrink sleeve optical inspection device provided by this utility model;

[0023] Figure 5 A schematic diagram of the mold tube structure of a heat shrinkable sleeve optical inspection device provided by this utility model.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Base; 2. Tube drying machine; 3. High-precision camera; 4. Adjustable mounting mechanism; 401. First slide rail; 402. Threaded rotating assembly; 403. Moving box; 404. Fine-tuning knob; 405. Sliding block; 5. Fixed mounting mechanism; 501. Electromagnetic vibrator; 502. Connecting plate; 6. First flow pipe; 7. Second flow pipe; 8. Mold tube; 801. Support body; 802. Positioning groove; 9. Fixed joint; 901. Outer sleeve; 902. Threaded positioning hole; 903. Positioning bolt. Detailed Implementation

[0026] The specific embodiments of this utility model are described in detail below, but it should be understood that the protection scope of this utility model is not limited to the specific embodiments.

[0027] like Figures 1 to 5 As shown, this embodiment of the utility model provides an optical inspection device for heat shrink tubing, including a base 1 and a high-precision camera 3. The high-precision camera 3 is securely fixed above the base 1 by a bracket, and the high-precision camera 3 and the base 1 adopt a detachable structural design. The device also includes an adjustable mounting mechanism 4 and a fixed mounting mechanism 5 located on the base 1. Fixed connectors 9 are fixedly mounted on both the adjustable mounting mechanism 4 and the fixed mounting mechanism 5, and mold tubes 8 are detachably mounted on the adjacent sides of these two sets of fixed connectors 9. This detachable installation method facilitates the replacement of suitable mold tubes 8 according to different specifications and models of heat shrink tubing, improving the versatility of the device. In the two sets of fixed connectors 9, a first flow pipe 6 is provided on the side of one set of fixed connectors 9 away from the mold tube 8, and a second flow pipe 7 is provided on the side of the other set of fixed connectors 9 away from the mold tube 8. Furthermore, the first flow pipe 6, the second flow pipe 7, the two sets of mold tubes 8, and the two sets of fixed connectors 9 are internally interconnected, thereby providing a fluid flow channel for subsequent airtightness testing.

[0028] In the actual testing process, the heat shrinkable sleeve to be tested is first fitted onto the mold tube 8. Then, the support ends of the two sets of mold tubes 8 are aligned (the mold tube 8 includes a support end and a connecting end), so that the heat shrinkable sleeve is fitted onto the interface of the two sets of mold tubes 8. Next, the heat shrinkable sleeve is heated using a sleeve drying machine 2. Under heating, the heat shrinkable sleeve gradually shrinks and tightly fits onto the mold tube 8. Through this process, the shape change of the heat shrinkable sleeve before and after shrinkage can be visually observed, thus providing a preliminary judgment on whether its shrinkage performance meets the requirements.

[0029] After completing the shrinkage test, the airtightness test is performed next. Fluid is injected into the mold tube 8 through the first flow pipe 6. The fluid can be liquid or gas, depending on the actual testing requirements; in this embodiment, liquid is used. During the fluid injection process, carefully observe whether any liquid flows out from both ends of the heat shrink sleeve. If no fluid flows out from both ends of the heat shrink sleeve, it indicates that a good seal has been formed between the heat shrink sleeve and the mold tube 8, and the airtightness is good. Conversely, if fluid flows out from both ends of the heat shrink sleeve, it indicates that the heat shrink sleeve has a problem with a poor seal, and the airtightness is unqualified.

[0030] After completing the fluid injection test for airtightness, the fluid in the mold tube 8 and the heat shrink tubing needs to be emptied. At this point, the fluid pump connected to the end of the second flow pipe 7 begins to function. The fluid pump creates a negative pressure environment, and the negative pressure and flowing air quickly remove the fluid from the heat shrink tubing and mold tube 8, thus completing the entire testing operation. This method of testing airtightness by injecting fluid and then emptying the fluid using negative pressure is simple, efficient, and can accurately determine the airtightness of the heat shrink tubing.

[0031] The adjustable installation mechanism 4 mainly includes a lateral displacement adjustment component fixedly mounted on the base 1, and a sliding block 405 that is fitted onto the lateral displacement adjustment component. A set of fixed connectors 9 are fixedly mounted on the sliding block 405. The lateral displacement adjustment component has the function of driving the set of fixed connectors 9 to move laterally. When installing the heat shrink tubing, the distance between the two sets of mold tubes 8 can be adjusted by laterally moving the fixed connectors 9, making it easier for the heat shrink tubing to be fitted onto the mold tubes 8. Similarly, when replacing the mold tubes 8, the lateral displacement adjustment component can be used to move the fixed connectors 9 to a suitable position, facilitating the removal and installation of new mold tubes 8.

[0032] Specifically, the lateral displacement adjustment assembly includes a first slide rail 401 fixedly mounted on the base 1, and a movable box 403 slidably fitted onto the first slide rail 401. Inside the first slide rail 401, a threaded rotating assembly 402 is rotatably mounted along the distribution direction of the first slide rail 401, and the threaded rotating assembly 402 is threadedly connected to the movable box 403. The threaded rotating assembly 402 can be in the form of a threaded rod, such as... Figure 4 As shown. In actual operation, the operator only needs to rotate the threaded rotating component 402. Due to the threaded connection between the threaded rotating component 402 and the movable box 403, the rotational motion of the threaded rotating component 402 is converted into the linear movement of the movable box 403. As the movable box 403 moves, it drives the sliding block 405 to move as well, thus completing the adjustment of the position of the sliding block 405. This method of displacement adjustment via threaded rotation has the advantages of high adjustment accuracy and good stability.

[0033] The fixed installation mechanism 5 includes an electromagnetic vibrator 501 fixedly mounted on the base 1. A connecting plate 502 is fixedly connected to the output end of the electromagnetic vibrator 501, and a set of fixed connectors 9 are fixedly mounted on the connecting plate 502. The electromagnetic vibrator 501 has the function of driving the connecting plate 502 and the corresponding fixed connectors 9 to perform transverse high-frequency vibration. Because the heat shrink tubing itself has a certain degree of flexibility and elasticity, when the electromagnetic vibrator 501 is activated, driving the fixed connectors 9 and the mold tube 8 to vibrate, the heat shrink tubing will undergo a certain degree of displacement and deformation under the action of vibration, thereby allowing the heat shrink tubing to partially and automatically detach from the two sets of mold tubes 8. This simplifies the operation process of cleaning the heat shrink tubing and mold tube 8 and improves work efficiency.

[0034] To prevent interference between one set of mold tubes 8 when the electromagnetic vibrator 501 drives one set of mold tubes 8 to vibrate, a sliding block 405 is slidably fitted inside the moving box 403. A fine-tuning knob 404 is threadedly connected to the front end of the moving box 403. The fine-tuning knob 404 is threaded through the front end of the moving box 403 and rotatably connected to the sliding block 405. Before vibration operation, the operator can rotate the fine-tuning knob 404, causing the sliding block 405 to move backward inside the moving box 403 through the threaded engagement between the knob 404 and the moving box 403. This creates a gap between the two sets of mold tubes 8, effectively preventing interference from the vibration of one set of mold tubes 8 to the other, ensuring the stability and accuracy of the testing process.

[0035] In one specific embodiment, each set of fixed joints 9 includes an outer sleeve 901, with a conveying channel in the middle of the outer sleeve 901 that slides with the mold tube 8. This conveying channel facilitates the insertion of the mold tube 8 into the outer sleeve 901 and ensures stable installation of the mold tube 8 within it. On the side of the outer sleeve 901, threaded positioning holes 902 communicating with the conveying channel are provided. Two sets of threaded positioning holes 902 can be provided; this design allows for further tightening of the mold tube 8 when necessary, improving the stability of the mold tube 8 installation. Figure 4 As shown. Inside the threaded positioning hole 902, a positioning bolt 903 is threadedly connected. In actual use, after the operator feeds the mold tube 8 into the conveying channel inside the outer sleeve 901, they rotate the positioning bolt 903, causing the positioning bolt 903 to gradually press against the surface of the mold tube 8. As the positioning bolt 903 is continuously tightened, the mold tube 8 is firmly fixed inside the outer sleeve 901. For the two sets of fixed joints 9, one set of outer sleeves 901 is fixedly connected to the connecting plate 502, and the other set of outer sleeves 901 is fixedly connected to the sliding block 405.

[0036] In another specific embodiment, such as Figure 2As shown, a heat-drying tubing machine 2 for heating the heat shrink tubing is installed on one side of the base 1. To facilitate operation and ensure accurate alignment of the heating port with the heat shrink tubing, a sliding rail is provided at the bottom of the heat-drying tubing machine 2. Operators can easily move the heat-drying tubing machine 2 along the sliding rail to adjust its position, ensuring precise alignment of the heating port with the heat shrink tubing and guaranteeing consistent heating performance.

[0037] In another specific embodiment, each set of mold tubes 8 has a support body 801 with a large radius at its front end. When the heat shrinkable sleeve is fitted onto the support body 801, the support body 801 is used to observe the shrinkage effect of the heat shrinkable sleeve. By comparing the dimensional changes of the heat shrinkable sleeve before and after heating with the dimensional relationship of the support body 801, the operator can more intuitively judge whether the shrinkage degree of the heat shrinkable sleeve meets the requirements. In addition, a positioning groove 802 is provided on the side of the mold tube 8 to cooperate with the positioning bolt 903. When the positioning bolt 903 is tightened, the end of the positioning bolt 903 will be embedded in the positioning groove 802, which further improves the stability of the mold tube 8 when it is fixed, prevents the mold tube 8 from shaking or displacing during the testing process, and thus ensures the accuracy of the test results.

[0038] Working principle: The operator places the heat shrinkable sleeve to be tested onto the two sets of mold tubes 8, aligning the support ends of the two sets of mold tubes 8 together. The heat shrinkable sleeve is then fitted onto the joint of the two sets of mold tubes 8. The sleeve drying machine 2 is then turned on, using its heating port to heat the heat shrinkable sleeve. During the heating process, the heat shrinkable sleeve gradually shrinks due to the heat, tightly fitting onto the mold tubes 8. The operator uses a high-precision camera 3 to observe the shape change of the heat shrinkable sleeve before and after shrinkage, making a preliminary judgment on whether its shrinkage performance meets the requirements.

[0039] After completing the shrinkage test, the airtightness test begins. Fluid is injected into the mold tube 8 through the first flow pipe 6. During injection, carefully observe whether liquid flows out from both ends of the heat shrink sleeve. If no liquid flows out from both ends of the heat shrink sleeve, it indicates that a good seal has been formed between the heat shrink sleeve and the mold tube 8, and the airtightness is good; if liquid flows out from both ends of the heat shrink sleeve, it indicates that the heat shrink sleeve has a problem with a poor seal, and the airtightness is unqualified. After the airtightness test is completed, the fluid in the mold tube 8 and the heat shrink sleeve needs to be cleaned. At this time, the fluid pump connected to the end of the second flow pipe 7 is started. The fluid pump creates a negative pressure environment, and the negative pressure and flowing air are used to quickly remove the fluid from the heat shrink sleeve and the mold tube 8, thereby completing the entire testing operation.

[0040] Rotating the fine-tuning knob 404, through its threaded engagement with the moving box 403, causes the sliding block 405 to move backward within the moving box 403, creating a certain gap between the two sets of mold tubes 8. This prevents the vibration of one set of mold tubes 8 from interfering with the other set. After the electromagnetic vibrator 501 in the rear fixed mounting mechanism 5 is activated, it drives the connecting plate 502 and the fixed joint 9 fixed on the connecting plate 502 to vibrate laterally at high frequency, thereby causing the mold tubes 8 to vibrate. Because the heat shrink tubing is soft and elastic, it will undergo a certain degree of displacement and deformation under vibration, thus partially and automatically detaching from the two sets of mold tubes 8, simplifying the cleaning process.

[0041] The equipment is equipped with an adjustable mounting mechanism 4. When the threaded rotating component 402 in its lateral displacement adjustment assembly rotates, it converts the rotational motion into linear movement of the moving box 403. The movement of the moving box 403 drives the sliding block 405 to move, which in turn drives a set of fixed joints 9 fixed on the sliding block 405 to move laterally. When installing heat shrink tubing, the distance between the two sets of mold tubes 8 can be adjusted by moving the fixed joints 9 laterally, making it easier for the heat shrink tubing to fit together. When replacing the mold tube 8, this function can also be used to move the fixed joints 9 to a suitable position, facilitating the disassembly and installation of the new mold tube 8.

[0042] When fixing the mold tube 8, after sending the mold tube 8 into the conveying channel inside the outer sleeve 901, rotate the positioning bolt 903 to gradually press the surface of the mold tube 8. As the positioning bolt 903 is tightened continuously, the mold tube 8 is firmly fixed inside the outer sleeve 901.

[0043] Each set of mold tubes 8 has a support body 801 with a large radius at the front end. When the heat shrinkable sleeve is fitted onto the support body 801, it is easy to observe the shrinkage effect of the heat shrinkable sleeve. By comparing the dimensional changes of the heat shrinkable sleeve before and after heating with the dimensional relationship of the support body 801, it is possible to intuitively judge whether the shrinkage degree of the heat shrinkable sleeve meets the requirements. The side of the mold tube 8 has a positioning groove 802 that cooperates with the positioning bolt 903. When the positioning bolt 903 is tightened, its end is embedded in the positioning groove 802, which further improves the stability of the mold tube 8 when it is fixed and prevents the mold tube 8 from shaking or shifting during the testing process.

[0044] The above-disclosed embodiments are only a few specific examples of the present utility model. However, the embodiments of the present utility model are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present utility model.

Claims

1. An optical inspection device for heat shrink tubing, comprising a base (1) and a high-precision camera (3), wherein the high-precision camera (3) is fixed above the base (1) by a bracket, characterized in that, The device also includes an adjustable mounting mechanism (4) and a fixed mounting mechanism (5) mounted on the base (1). Both the adjustable mounting mechanism (4) and the fixed mounting mechanism (5) are fixedly provided with fixed joints (9). Mold tubes (8) can be detachably installed on the side of the two sets of fixed joints (9) that are close to each other. A first flow pipe (6) is provided on the side of one set of fixed joints (9) away from the mold tube (8), and a second flow pipe (7) is provided on the side of the other set of fixed joints (9) away from the mold tube (8). The first flow pipe (6), the second flow pipe (7), the two sets of mold tubes (8) and the two sets of fixed joints (9) are all interconnected.

2. The optical inspection device for heat shrink tubing as described in claim 1, characterized in that, The adjustable mounting mechanism (4) includes a lateral displacement adjustment component fixedly mounted on the base (1) and a sliding block (405) that is fitted onto the lateral displacement adjustment component. A set of fixed joints (9) are fixed onto the sliding block (405).

3. The optical inspection device for heat shrink tubing as described in claim 2, characterized in that, The fixed installation mechanism (5) includes an electromagnetic vibrator (501) fixedly installed on the base (1), and a connecting plate (502) is fixedly connected to the output end of the electromagnetic vibrator (501). A set of fixed joints (9) are fixed on the connecting plate (502).

4. The optical inspection device for heat shrink tubing as described in claim 2 or 3, characterized in that, Each set of fixed joints (9) includes an outer sleeve (901), the outer sleeve (901) is provided with a conveying channel in the middle that slides with the mold tube (8), the outer sleeve (901) is provided with a threaded positioning hole (902) connected to the conveying channel on the side, and a positioning bolt (903) is threaded inside the threaded positioning hole (902); one set of outer sleeves (901) is fixedly connected to the connecting plate (502), and the other set of outer sleeves (901) is fixedly connected to the sliding block (405).

5. The optical inspection device for heat shrink tubing as described in claim 2, characterized in that, The lateral displacement adjustment assembly includes a first slide rail (401) fixedly mounted on the base (1), a movable box (403) slidably fitted on the first slide rail (401), and a sliding block (405) fitted inside the movable box (403); a threaded rotating assembly (402) is distributed and rotatably mounted on the inner side of the first slide rail (401) along the first slide rail (401), and the threaded rotating assembly (402) is threadedly connected to the movable box (403).

6. The optical inspection device for heat shrink tubing as described in claim 5, characterized in that, The sliding block (405) is slidably fitted inside the movable box (403). The front end of the movable box (403) is threadedly connected to a fine adjustment knob (404). The fine adjustment knob (404) is threaded through the front end of the movable box (403) and is rotatably connected to the sliding block (405).

7. The optical inspection device for heat shrink tubing as described in claim 4, characterized in that, A heat-drying tubing machine (2) for heating the heat-shrink tubing is provided on one side of the base (1).

8. The optical inspection device for heat shrink tubing as described in claim 7, characterized in that, The base (1) is provided with a slide rail on one side that slides in conjunction with the bottom of the tube drying machine (2).

9. The optical inspection device for heat shrink tubing as described in claim 1, characterized in that, Each of the mold tubes (8) is provided with a support body (801) with a large radius at the front end.

10. The optical inspection device for heat shrink tubing as described in claim 9, characterized in that, The side of the mold tube (8) is provided with a positioning groove (802) that cooperates with the positioning bolt (903).

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