Laser detection device for air freshener tank

Abstract

A laser detection device for an air freshener tank body comprises a water tank, the side part of which is provided with a pressurizing port for adjusting the internal water pressure; the upper cover is arranged at the upper opening of the water tank; the plurality of groups of probes slidably penetrate through the upper cover, and a detection block is arranged at the upper end of each group of probes; the fixing mechanism is arranged in the water tank and used for fixing the tank body and driving the tank body to rotate around the center axis of the tank body; and the laser detection unit is arranged above the upper cover. According to the invention, the probe is in contact with the tank body, the deformation of the tank body is converted into the up-down displacement of the probe, and the deformation of the tank body is judged by measuring the displacement of the probe, so that the problem that the precision is easily interfered when the laser detection unit directly penetrates through a water medium for measurement is solved, and the accuracy and reliability of detection are remarkably improved.

Description

Technical Field

[0001] This invention belongs to the field of detection technology, specifically referring to a laser detection device for air freshener cans. Background Technology

[0002] Air fresheners, as a common aerosol product, require their containers to undergo water bath testing under a constant pressure of 0.80MPa–0.85MPa during the production process, in accordance with the GB / T14449-2017 standard "Test Methods for Aerosol Products", to verify the airtightness and structural resistance to deformation of the container.

[0003] Currently, airtightness testing can be visually assessed by observing the presence of bubbles in a water bath. However, the minute deformations of the tank under fixed pressure are difficult to evaluate accurately using traditional methods. To meet the precision and automation requirements of intelligent manufacturing, laser inspection technology has been gradually introduced into deformation monitoring. However, in practical applications, this technology still faces several precision challenges: First, laser light is easily affected by refraction and fluid disturbances when passing through water. Second, bubbles adhering to the tank surface and the high reflectivity of the material itself can severely impact laser signal reception. Furthermore, maintaining stable pressure within the tank is crucial throughout the testing process. Pressure fluctuations can cause the tank to elastically rebound, and if the tank ruptures and loses pressure, the deformation cannot be maintained, resulting in some tanks exhibiting rebound, thus masking the true plastic deformation and affecting the accuracy of the measurement results. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the present invention provides a laser detection device for air freshener cans, which at least partially solves the above problems.

[0005] The technical solution adopted by this invention is as follows: This invention proposes a laser detection device for air freshener cans, comprising: Water tank; The top cover is located at the upper opening of the water tank; Multiple sets of probes are slidably disposed through the upper cover, and each set of probes has a detection block at its upper end; A fixing part is provided inside the water tank to fix the tank body and drive it to rotate around its own central axis; A laser detection unit is arranged above the upper cover to detect the displacement of the probe.

[0006] Furthermore, the upper cover is provided with multiple sets of rotating grooves, and a rotating plate is rotatably provided in each rotating groove. The probe is slidably disposed on the rotating plate, and a sealed sliding connection is formed between the detection block and the rotating plate.

[0007] Furthermore, the detection block and the rotating plate are connected by an anti-detachment spring.

[0008] Furthermore, the rotating plate is provided with a detection cavity, the probe slides through the detection cavity, the detection block slides in the detection cavity, and the anti-detachment spring is connected between the bottom wall of the detection cavity and the detection block.

[0009] Furthermore, the rotating groove has symmetrical arcs on two side walls in the direction of rotation of the rotating plate. Each arc has symmetrically distributed chamfered structures on its upper and lower edges. The chamfered structures are used to provide clearance space when the probe rotates with the rotating plate, so as to prevent the probe from interfering with the side walls of the rotating groove.

[0010] Furthermore, a sealing ring is provided around the center of the inner wall of the rotating groove.

[0011] Furthermore, the upper wall of the cover is symmetrically provided with a first pressure groove, and the upper and lower walls of the rotating plate are symmetrically provided with a second pressure groove. The first pressure groove is adapted to the second pressure groove, and a pressure strip that cooperates with the second pressure groove is detachably provided in the first pressure groove.

[0012] Furthermore, the fixing part includes a fixing shaft, a clamping shaft, a cylinder, a motor, and a centering assembly. The fixing shaft is located on the side wall of the water tank and extends into the water tank. The clamping shaft is located through the side wall of the water tank opposite to the fixing shaft. The cylinder is located on the outer side wall of the water tank. The telescopic end of the cylinder is rotatably connected to the clamping shaft through a connecting rod, and is used to drive the clamping shaft to move axially. The motor is connected to the clamping shaft through a gear set, and is used to drive the clamping shaft to rotate.

[0013] Furthermore, the centering components are respectively located at the opposite ends of the fixed shaft and the clamping shaft. The centering components include at least three sets of longitudinal positioning rods that can slide radially along the fixed shaft, and each set of longitudinal positioning rods has a pressure roller rotatably mounted at its end.

[0014] Furthermore, the centering assembly also includes a positioning block and a sliding sleeve. The sliding sleeve is respectively fitted onto the opposite ends of the fixed shaft and the clamping shaft and can slide axially. The positioning block is provided with at least three sets of radially extending guide rods. The longitudinal positioning rod is slidably disposed on the guide rod. A radial spring is connected between the longitudinal positioning rod and the positioning block. The sliding sleeve and the longitudinal positioning rod are hinged through a variable amplitude rod.

[0015] The beneficial effects achieved by this invention are as follows: by contacting the probe with the tank, the deformation of the tank is converted into the vertical displacement of the probe. The amount of deformation of the tank is determined by measuring the displacement of the probe. This solves the problem that the accuracy of the laser detection unit is easily interfered with when it directly passes through the water medium for measurement, and significantly improves the accuracy and reliability of the detection. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the laser detection device for air freshener cans according to an embodiment of the present invention; Figure 2 for Figure 1 A sectional view; Figure 3 This is a structural schematic diagram of the fixing part; Figure 4 This is a sectional view showing the fit between the top cover and the rotating plate. Figure 5 This is a sectional view of the top cover; Figure 6 This is a cross-sectional view showing the fit between the rotating plate and the probe.

[0017] The components include: 1. Laser detection unit; 2. Water tank; 3. Top cover; 4. Water inlet; 5. Water outlet; 6. Fixed shaft; 7. Pressing shaft; 8. Rotating plate; 9. Probe; 10. Pressure bar; 11. Cylinder; 12. Connecting rod; 13. Motor; 14. Gear set; 15. Positioning block; 16. Guide rod; 17. Longitudinal positioning rod; 18. Pressure roller; 19. Centripetal spring; 20. Sliding sleeve; 21. Amplitude rod; 22. Rotary groove; 23. Sealing ring; 24. Arc body; 25. Chamfered structure; 26. First pressure groove; 27. Second pressure groove; 28. Detection chamber; 29. ​​Detection block; 30. Anti-detachment spring.

[0018] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0020] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0021] like Figure 1 and Figure 2As shown in the figure, an embodiment of the present invention proposes a laser detection device for air freshener cans, comprising a water tank 2, a top cover 3, a detection probe 9, a fixing part, and a laser detection unit 1. The water tank 2 is made of a transparent and observable material, such as acrylic sheet or glass, to facilitate observation of whether the can is leaking. An inlet 4 and an outlet 5 are respectively provided on two opposite sides of the water tank 2. During detection, gas with a certain pressure is injected into the can, and simultaneously pressurized liquid is injected into the water tank 2 through the inlet 4, so that the internal pressure of the water tank 2 is stabilized within the range of 0.80MPa–0.85MPa. The pressure value must always be higher than the internal pressure of the tank. Unlike the traditional method of pressurizing the tank, this method uses external water pressure to uniformly envelop and pressurize the tank, effectively simulating actual pressure conditions. This external pressurization method allows the tank to continuously withstand constant external pressure. Even if the tank ruptures and leaks, it can avoid the elastic rebound of the tank caused by a sudden drop in internal pressure, thus ensuring the accuracy and reliability of the deformation detection results. In addition, under this condition, even if the external water pressure is greater than the internal air pressure of the tank, the internal air bubbles will still escape when the tank ruptures, and will not affect the observation of the air bubbles.

[0022] Furthermore, in order to detect whether the tank is deformed and to measure the amount of deformation, the top cover 3 is set at the upper opening of the water tank 2 and multiple sets of probes 9 are configured thereon. The probes 9 are slidably set through the top cover 3 and the bottom of the probes 9 contacts the outer wall of the tank. When the tank is deformed, the amount of deformation will be converted into the displacement of the probes 9 in the vertical direction. The probes 9 are arranged sequentially at intervals along the axial direction of the tank. The smaller the interval between them, the higher the detection accuracy. The laser detection unit 1 is arranged above the top cover 3 to detect the displacement of the probes 9, thereby determining the amount of deformation of the tank.

[0023] To ensure the detection accuracy of each probe 9, reducing its diameter helps to improve measurement sensitivity. However, an excessively small diameter will affect the laser detection unit 1's recognition and tracking of the probe 9. To resolve this contradiction, a detection block 29 is provided at the upper end of each group of probes 9. The detection block 29 has a planar structure suitable for laser capture, which can effectively enhance laser reflection or visual recognition signals. Thus, while ensuring the accuracy advantage brought by the small diameter of the probe 9, the detection stability and accuracy of the laser detection unit 1 are significantly improved.

[0024] When detecting tank deformation, it is necessary to drive the tank to rotate. In order to accurately identify the amount of runout in the circumferential direction and the radial deformation distribution of the tank, it should be ensured that the tank rotates around its theoretical central axis. The fixing part is set inside the water tank 2, which can clamp and fix the tank from both ends and drive it to rotate around its own central axis, thereby establishing a stable motion reference for the accurate measurement of deformation.

[0025] In some embodiments, due to differences in tank size, the position of the tank within the water tank 2 is not fixed. To avoid interference between the probe 9 and the fixing part, such as... Figure 4 As shown, the upper cover 3 is provided with multiple sets of rotating grooves 22, and a rotating plate 8 is rotatably provided in each rotating groove 22. The probe 9 is slidably provided on the rotating plate 8. For the probe 9 that may cause interference, simply rotating the rotating plate 8 can rotate the probe 9 to the outside of the water tank 2. At the same time, since the probe 9 is slidably connected to the upper cover 3 and the diameter of the probe 9 is small, it is difficult to seal the probe 9 and the upper cover 3. In order to prevent the liquid in the water tank 2 from overflowing from the gap between the probe 9 and the upper cover 3, a larger detection block 29 can be used to achieve a sealing effect, so that a sealed sliding connection is formed between the detection block 29 and the rotating plate 8. Specifically, the rotating plate 8 is provided with a detection cavity 28, the probe 9 is slidably provided through the detection cavity 28, the detection block 29 is slidably provided in the detection cavity 28, and the detection block 29 is provided with a groove, and an O-ring is provided in the groove to achieve a sliding sealing fit.

[0026] In some embodiments, combined with Figure 6 As shown, in order to ensure that the probe 9 always moves towards the tank and fits against the surface of the tank, an anti-detachment spring 30 is provided between the detection block 29 and the rotating plate 8. The anti-detachment spring 30 applies a force to the detection block 29 to move towards the probe 9. The anti-detachment spring 30 is connected between the bottom wall of the detection cavity 28 and the detection block 29.

[0027] In some embodiments, such as Figure 5 As shown, the rotating groove 22 has symmetrical arcs 24 on its two side walls in the direction of rotation of the rotating plate 8. Each arc 24 has symmetrically distributed chamfered structures 25 on its upper and lower edges. The chamfered structures 25 provide clearance space for the probe 9 when it rotates with the rotating plate 8, preventing interference and collision between the probe 9 and the side wall of the rotating groove 22. When the probe 9 rotates with the rotating plate 8 to the chamfered structure 25, it will follow the arc of the chamfered structure 25 and gradually shrink into the interior of the rotating plate 8, thereby effectively rotating to the top of the cover 3 and avoiding collision of the probe 9. Furthermore, in order to prevent leakage when the rotating plate 8 rotates in the rotating groove 22, a sealing ring 23 is arranged around the middle of the inner wall of the rotating groove 22. The sealing ring 23 is embedded in the side wall of the rotating groove 22 and forms a sealing effect with the rotating plate 8.

[0028] In some embodiments, such as Figure 1 , Figure 5 and Figure 6As shown, when the rotating plate 8 rotates to the corresponding direction, in order to prevent the rotating plate 8 from rotating and shifting again, a first pressure groove 26 is symmetrically provided on the upper wall of the upper cover 3, and a second pressure groove 27 is symmetrically provided on the upper and lower walls of the rotating plate 8. The first pressure groove 26 and the second pressure groove 27 are adapted to each other, and a pressure strip 10 that cooperates with the second pressure groove 27 is detachably provided in the first pressure groove 26; that is, the pressure strip 10 is embedded in the first pressure groove 26 and the second pressure groove 27, and restricts the displacement of the rotating plate 8 in the circumferential direction, so that the rotating plate 8 remains horizontal, thereby keeping the probe 9 on the rotating plate 8 in the vertically downward direction, so as to accurately detect the deformation of the circumferential side wall of the tank.

[0029] In some embodiments, such as Figures 2-3 As shown, the fixing part includes a fixing shaft 6, a clamping shaft 7, a cylinder 11, a motor 13, and a centering assembly. The fixing shaft 6 is located on the side wall of the water tank 2 and extends into the water tank 2. The clamping shaft 7 is located through the side wall of the water tank 2 opposite to the fixing shaft 6. The cylinder 11 is located on the outer side wall of the water tank 2. The telescopic end of the cylinder 11 is rotatably connected to the clamping shaft 7 through a connecting rod 12, which is used to drive the clamping shaft 7 to move axially. The motor 13 is connected to the clamping shaft 7 through a gear set 14, which is used to drive the clamping shaft 7 to rotate. The centering assembly is located at the opposite ends of the fixing shaft 6 and the clamping shaft 7, respectively.

[0030] In actual operation, the tank is placed on the centering assembly of the water tank 2. The centering assembly can provide auxiliary support for the tank and automatically center it so that its central axis coincides with the axis of the fixed shaft 6 and the clamping shaft 7. Then, the cylinder 11 drives the clamping shaft 7 to move towards the fixed shaft 6. The clamping shaft 7 and the fixed shaft 6 clamp the two ends of the tank. When it is necessary to rotate to detect the amount of deformation, the tank can be locked and fixed by pressure and will not shift.

[0031] In some embodiments, the centering assembly includes at least three sets of longitudinal positioning rods 17 that can slide radially along the fixed shaft 6. Each set of longitudinal positioning rods 17 has a pressure roller 18 rotatably mounted at its end. The centering assembly also includes a positioning block 15 and a sliding sleeve 20. The sliding sleeve 20 is respectively fitted onto the opposite ends of the fixed shaft 6 and the pressing shaft 7 and can slide axially. The positioning block 15 is provided with at least three sets of radially extending guide rods 16. The longitudinal positioning rods 17 are slidably mounted on the guide rods 16. A radial spring 19 is connected between the longitudinal positioning rods 17 and the positioning block 15. The sliding sleeve 20 is hinged to the longitudinal positioning rods 17 through a variable amplitude rod 21.

[0032] Specifically, before testing, the sliding sleeve 20 is pushed towards the positioning block 15. The longitudinal positioning rod 17 is made to slide outward along the guide rod 16 by the amplitude rod 21, overcoming the resistance of the radial spring 19. Thus, each longitudinal positioning rod 17 is opened. Then, the tank is placed in the middle area of ​​each longitudinal positioning rod 17, and the sliding sleeve 20 is released. Under the tension of the radial spring 19, the longitudinal positioning rod 17 will move the same distance towards the tank until the pressure roller 18 is in contact with the surface of the tank, and the center of the tank is forced to coincide with the center of the fixed shaft 6 and the clamping shaft 7, thus completing the auxiliary positioning of the tank. Then, the tank is clamped by the fixed shaft 6 and the clamping shaft 7.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0034] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A laser detection device for air freshener cans, comprising a water tank (2), characterized in that, Also includes: The top cover (3) is located at the upper opening of the water tank (2); Multiple sets of probes (9) are provided to slide up and down through the upper cover (3), and each set of probes (9) has a detection block (29) at its upper end. A fixing part is provided inside the water tank (2) for fixing the tank body and driving it to rotate around the central axis of the tank body; A laser detection unit (1) is arranged above the upper cover (3) to detect the vertical displacement of the probe (9).

2. The laser detection device for air freshener cans according to claim 1, characterized in that: The upper cover (3) is provided with multiple sets of rotating grooves (22), and each rotating groove (22) is provided with a rotating plate (8). The probe (9) is slidably disposed on the rotating plate (8), and the detection block (29) and the rotating plate (8) form a sealed sliding connection.

3. The laser detection device for air freshener cans according to claim 2, characterized in that: The detection block (29) is connected to the rotating plate (8) by an anti-detachment spring (30).

4. The laser detection device for air freshener cans according to claim 3, characterized in that: The rotating plate (8) is provided with a detection cavity (28), the probe (9) slides through the detection cavity (28), the detection block (29) slides in the detection cavity (28), and the anti-detachment spring (30) is connected between the bottom wall of the detection cavity (28) and the detection block (29).

5. The laser detection device for air freshener cans according to claim 2, characterized in that: The rotating groove (22) has symmetrical arcs (24) on two side walls in the rotation direction of the rotating plate (8). Each arc (24) has symmetrically distributed chamfer structures (25) on its upper and lower edges. The chamfer structures (25) are used to provide clearance space when the probe (9) rotates with the rotating plate (8) to prevent the probe (9) from interfering with the side wall of the rotating groove (22).

6. The laser detection device for air freshener cans according to claim 5, characterized in that: A sealing ring (23) is provided around the middle of the inner wall of the rotating groove (22).

7. The laser detection device for air freshener cans according to claim 2, characterized in that: The upper wall of the cover (3) is symmetrically provided with a first pressure groove (26), and the upper and lower walls of the rotating plate (8) are symmetrically provided with a second pressure groove (27). The first pressure groove (26) is adapted to the second pressure groove (27), and a pressure strip (10) that cooperates with the second pressure groove (27) is detachably provided in the first pressure groove (26).

8. The laser detection device for air freshener cans according to claim 1, characterized in that: The fixing part includes a fixing shaft (6), a pressing shaft (7), a cylinder (11), a motor (13), and a centering assembly. The fixing shaft (6) is located on the side wall of the water tank (2) and extends into the water tank (2). The pressing shaft (7) is located through the side wall of the water tank (2) opposite to the fixing shaft (6). The cylinder (11) is located on the outer side wall of the water tank (2). The telescopic end of the cylinder (11) is rotatably connected to the pressing shaft (7) through a connecting rod (12) to drive the pressing shaft (7) to move axially. The motor (13) is connected to the pressing shaft (7) through a gear set (14) to drive the pressing shaft (7) to rotate. The centering assembly is located at the opposite ends of the fixing shaft (6) and the pressing shaft (7).

9. The laser detection device for air freshener cans according to claim 8, characterized in that: The centering assembly includes at least three sets of longitudinal positioning rods (17) that can slide radially along a fixed axis (6), and each set of longitudinal positioning rods (17) is rotatably provided with a pressure roller (18) at its end.

10. The laser detection device for air freshener cans according to claim 9, characterized in that: The centering assembly also includes a positioning block (15) and a sliding sleeve (20). The sliding sleeve (20) is respectively fitted onto the opposite ends of the fixed shaft (6) and the clamping shaft (7) and can slide along the axial direction. The positioning block (15) is provided with at least three sets of radially extending guide rods (16). The longitudinal positioning rod (17) is slidably disposed on the guide rod (16). A radial spring (19) is connected between the longitudinal positioning rod (17) and the positioning block (15). The sliding sleeve (20) and the longitudinal positioning rod (17) are hinged through a variable amplitude rod (21).

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