A lampshade structure of an ultraviolet light curing machine

Abstract

This utility model discloses a lampshade structure for an ultraviolet curing machine, including a lampshade body and an ultraviolet light source. The lampshade body has end caps at both ends. A reflector is coaxially mounted inside the lampshade body, with multiple reflective grooves formed along its circumference on the outer surface of the reflector. These reflective grooves and the inner wall of the lampshade body form a cooling channel. A centrifugal fan is installed on one side of the end caps, and the centrifugal fan is connected to the cooling channel. This utility model integrates an independent cooling channel within the circumferential wall of the lampshade body. The centrifugal fan drives the cooling airflow axially within the channel, forming a highly efficient directional heat dissipation path. This results in uniform heat dissipation and effectively prevents external contaminants from entering the lampshade, significantly improving heat dissipation efficiency and equipment reliability. By designing the cooling channel wall as an arc shape and also serving as the reflective layer substrate, structural and functional integration is achieved, making the lampshade structure more compact and its optical efficiency higher.

Description

Technical Field

[0001] This utility model relates to the technical field of ultraviolet light pipeline curing equipment, and in particular to a lampshade structure for an ultraviolet light curing machine. Background Technology

[0002] The UV curing machine is a core piece of equipment in trenchless pipeline repair. It emits UV light to irradiate a flexible tube impregnated with UV-curing resin, causing it to cure and form a robust new tube. The lamp cover, as the main body of the curing machine, carries the UV lamp tube and provides light path guidance and physical protection.

[0003] Existing lamp covers are typically cylindrical structures with UV lamps installed inside and exhaust fans at the rear for heat dissipation. This structure has significant drawbacks: the cooling airflow only flows within the cavity inside the lamp cover, which can easily create eddies and dead zones, resulting in poor heat dissipation in the center of the lamp cover, uneven circumferential temperature, affecting the lifespan of the lamps, and potentially causing localized overheating of the inner lining tube. Furthermore, the outer wall of the lamp cover is easily contaminated with resin dirt after operation, making cleaning and maintenance difficult and affecting light output efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a lampshade structure for a UV curing machine to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A lampshade structure for an ultraviolet curing machine includes a lampshade body and an ultraviolet light source disposed within the lampshade body. End caps are respectively provided at both ends of the lampshade body. A reflector is coaxially disposed within the lampshade body, with the outer wall of the reflector abutting against the inner wall of the lampshade body. Multiple axially extending reflective grooves are formed on the outer surface of the reflector along its circumference, forming an axially extending air-cooling channel between the reflective grooves and the inner wall of the lampshade body. A centrifugal fan is installed on one side of the end cap, with the fan's outlet penetrating the side wall of the end cap and communicating with the air-cooling channel for delivering cooling airflow into the air-cooling channel.

[0006] Preferably, the cross-section of the lampshade body is a regular polygon, the number of reflective grooves is the same as the number of sides of the lampshade body, and the opening of each reflective groove faces a plane on the inner wall of the lampshade body.

[0007] Preferably, the lampshade body is a regular octagon, and the outer surface of the reflector tube is provided with eight reflective grooves; the openings of the reflective grooves correspond to the plane of the inner wall of the lampshade body, so that the reflective grooves and the inner wall of the lampshade body form eight air-cooling channels.

[0008] Preferably, the ultraviolet light source includes multiple sets of ultraviolet lamp modules, which are arranged one-to-one in the reflective groove, wherein the ultraviolet lamp modules are evenly distributed along the inner wall plane of the lamp cover body.

[0009] Preferably, the cross-section of the reflective groove is an arc-shaped structure with the concave surface facing the central axis of the reflector tube, and its inner surface is provided with a reflective film layer.

[0010] Preferably, the reflector has an axially penetrating heat dissipation hole at its center, and the inner wall of the heat dissipation hole is provided with a plurality of axially extending heat dissipation fins, each of which is fixedly connected to the inner wall of the heat dissipation hole by thermally conductive silicone grease.

[0011] Preferably, the outer wall of the lampshade body is provided with a cleaning ring that slides along its axial direction, and the inner side of the cleaning ring is provided with a scraping part that matches the contour of the outer wall of the lampshade body.

[0012] Preferably, the end cap is fitted with a ventilation mesh plate, which is connected to the air-cooling channel and the heat dissipation through hole respectively.

[0013] Preferably, a movable component is installed on the side of the end cap away from the lampshade body. The movable component includes a fixed base, wherein one side of the fixed base is fixedly connected to the end cap by multiple connecting rods; the side of the fixed base away from the connecting rods is provided with multiple telescopic support arms with rollers.

[0014] Compared with existing technologies, the advantages of this invention are as follows: By integrating an independent air-cooling channel within the circumferential wall of the lampshade body, the heat dissipation channel is physically isolated from the light source installation space. A centrifugal fan drives the cooling airflow axially within the channel, forming a highly efficient directional heat dissipation path. This results in uniform heat dissipation, no airflow dead zones, and effective prevention of external contaminants from entering the lampshade, thus significantly improving heat dissipation efficiency and equipment reliability. By designing the air-cooling channel wall as an arc shape and also serving as the reflective layer substrate, structural and functional integration is achieved, resulting in a streamlined, low-resistance channel and a highly efficient reflective surface, making the lampshade structure more compact and its optical efficiency higher. The addition of a sliding cleaning ring allows for quick removal of contaminants from the outer wall of the lampshade body, greatly facilitating on-site maintenance and ensuring the stability of light output. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is an exploded view of the structure of this utility model; Figure 3 This is a schematic diagram of the connection between the lampshade body and the reflector of this utility model; Figure 4 This is a schematic diagram of the structure of the reflector of this utility model; Figure 5 This is a schematic diagram of the cleaning ring of this utility model.

[0016] The components include: 1. Lamp cover body; 2. End cap; 3. Reflector tube; 4. Reflector groove; 5. Air-cooled flow channel; 6. Centrifugal fan; 7. UV lamp module; 8. Reflective film layer; 9. Heat dissipation fins; 10. Cleaning ring; 11. Scraping part; 12. Ventilation mesh plate; 13. Moving component; 1301. Fixed base; 1302. Connecting rod; 1303. Telescopic support arm; 1304. Roller. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings.

[0018] Please refer to the following: Figures 1 to 5 To achieve the above objectives, this utility model provides the following technical solution: A lampshade structure for an ultraviolet curing machine includes a lampshade body 1 and an ultraviolet light source disposed within the lampshade body 1. End caps 2 are respectively provided at both ends of the lampshade body 1. A reflector 3 is coaxially disposed inside the lampshade body 1, with the outer wall of the reflector 3 abutting against the inner wall of the lampshade body 1. Multiple axially extending reflective grooves 4 are formed on the outer surface of the reflector 3 along its circumference, forming an axially extending air-cooling channel 5 between the reflective grooves 4 and the inner wall of the lampshade body 1. A centrifugal fan 6 is installed on one side of the end cap 2, with the outlet of the centrifugal fan 6 penetrating through the side wall of the end cap 2 and communicating with the air-cooling channel 5, for delivering cooling airflow into the air-cooling channel 5.

[0019] During operation, the ultraviolet light source emits light when powered on, generating ultraviolet radiation for curing materials such as coatings and inks. The ultraviolet lamp module 7 emits light in all directions, with the portion directly hitting the work surface being direct light. Light rays hitting the inner side of the reflector groove 4 (i.e., towards the central axis of the reflector tube 3) will strike the inner surface of the arc-shaped reflector groove 4 with the reflective film layer 8. According to optical principles, these rays are precisely reflected and converged, ultimately projected onto the work surface, superimposed with the direct light. The arc-shaped structure of the reflector groove 4 is optically designed to effectively collect the large amount of ultraviolet light that would otherwise be wasted and emitted to the sides and rear, and reflect it onto the work surface. This greatly improves the utilization efficiency of ultraviolet light, meaning that the same curing effect can be achieved using lamps with lower power, or... When using lamps of the same power, the curing time is shortened. At the same time, the centrifugal fan 6 installed on the end cover 2 is started. The centrifugal fan 6 draws in air from the outside, pressurizes it, and blows it out from the air outlet. The pressurized cooling airflow enters the air-cooling channel 5, which is formed by the reflective groove 4 on the outer wall of the reflector tube 3 and the inner wall of the lamp cover body 1, through the opening on the end cover 2. Since the air-cooling channel 5 extends along the axial direction of the lamp cover body 1, the cooling airflow will flow at high speed from one end of the lamp cover body 1 to the other end, just like passing through a "pipe". During this process, the airflow exchanges heat with the ultraviolet lamp module 7 installed close to the reflective groove 4, absorbing and carrying away a large amount of heat generated by it. Finally, the airflow carrying heat is discharged from the outlet at the other end of the lamp cover body 1, completing one cooling cycle.

[0020] In a preferred embodiment, this utility model can be further configured as follows: Figure 3 , Figure 4As shown; the cross-section of the lampshade body 1 is a regular polygon, the number of reflective grooves 4 is the same as the number of sides of the lampshade body 1, and the opening of each reflective groove 4 faces a plane of the inner wall of the lampshade body 1; eight reflective grooves 4 are opened on the outer surface of the reflector tube 3; the openings of the reflective grooves 4 correspond to the planes of the inner wall of the lampshade body 1, so that eight air-cooling channels 5 are formed between the reflective grooves 4 and the inner wall of the lampshade body 1; a set of ultraviolet lamp modules 7 are installed in each reflective groove 4, so that when the lampshade body 1 is a regular octagon, there are eight sets of ultraviolet lamp modules 7, in which the eight sets of ultraviolet lamp modules 7 are symmetrically arranged at equal angles around the circumference of the reflector tube 3; each ultraviolet lamp module 7 emits The light rays are divided into two parts: one part shines directly onto the working surface above, and the other part shines onto the corresponding arc-shaped reflector groove 4. After being accurately reflected by the reflector groove 4, the light rays converge with the direct light onto the working surface. The eight light source points together form a superimposed and complete illumination area on the working surface. When the centrifugal fan 6 is started, the cooling airflow is sent into the air collection area of ​​the end cover 2. The airflow is then evenly distributed into eight independent and identical air-cooling channels 5 formed by the eight reflector grooves 4 and the eight inner wall planes of the lamp cover body 1. The eight airflows flow parallel and at high speed along the axial direction of the lamp cover body 1, respectively washing away the heat generated by the ultraviolet lamp module 7 at the corresponding position.

[0021] In a preferred embodiment, this utility model can be further configured as follows: Figure 3 As shown; the ultraviolet light source includes multiple sets of ultraviolet lamp modules 7, which are arranged one-to-one in the reflective grooves 4. The ultraviolet lamp modules 7 are evenly distributed along the inner wall plane of the lamp cover body 1. Each set of ultraviolet lamp modules 7 is precisely fixed to the bottom of a reflective groove 4 or a specific mounting position. One reflective groove 4 corresponds to one set of ultraviolet lamp modules 7. The circuits of all ultraviolet lamp modules 7 are connected in parallel or series, and are uniformly powered by an external power supply and control unit. When the device is started, each ultraviolet lamp module 7 acts as an independent linear light source. The ultraviolet light emitted into the surrounding space is divided into two parts. One part of the ultraviolet light is directed onto the working surface below the lamp cover body 1, while the other part is directed onto the arc-shaped inner wall of the reflector groove 4. According to the law of reflection, the reflected light is guided by the specific curved shape of the reflector groove 4, changes direction, and is eventually projected onto the working surface. This causes the direct light and reflected light of the ultraviolet lamp module 7 to converge and superimpose in the same area of ​​the working surface, forming a complete and high-intensity working light spot, thus achieving high light energy utilization and ultra-high illumination uniformity.

[0022] In a preferred embodiment, this utility model can be further configured as follows: Figure 4As shown; the cross-section of the reflective groove 4 is an arc-shaped structure with the concave surface facing the central axis of the reflective tube 3, and a reflective film layer 8 is provided on the inner surface of the reflective groove 4; the reflective film layer 8 is usually a high-reflectivity aluminum film or dielectric film, in which the reflective film layer 8 does not absorb ultraviolet light, but reflects it efficiently. Since the reflective surface is concave and arc-shaped, rather than flat, the light will be reflected at a specific angle according to the different impact points. The reflected light no longer remains parallel or simply diffuses like plane mirror reflection, but is converged by the concave surface to form a concentrated beam pointing towards the working surface. Finally, these reflected lights merge with the direct light from the ultraviolet lamp module 7 that is directly directed towards the working surface, and together they irradiate the surface of the material to be cured, which can obtain higher curing strength, realize efficient convergence and utilization of light energy, and significantly improve the efficiency of the light source.

[0023] In a preferred embodiment, this utility model can be further configured as follows: Figure 4 As shown; the reflector 3 has an axially penetrating heat dissipation hole at its center, and several axially extending heat dissipation fins 9 are arranged around the inner wall of the heat dissipation hole. The heat dissipation fins 9 are fixedly connected to the inner wall of the heat dissipation hole by thermally conductive silicone grease. When the ultraviolet light source is working, it generates a large amount of heat. This heat, which is radiated, passes through the reflector 3 and is directly transferred to the inner wall of the heat dissipation hole. The heat dissipation fins 9 are in close contact with the metal inner wall of the heat dissipation hole by thermally conductive silicone grease. The thermally conductive silicone grease fills the tiny gaps, greatly reducing the thermal resistance; the radiant heat is dissipated. After the heat is absorbed by the heat dissipation fins 9 inside the through hole, the surface area of ​​the heat dissipation fins 9 dissipates the heat into the air inside the through hole in the form of thermal convection and thermal radiation. The centrifugal fan 6 delivers cold air into the heat dissipation through hole, forming effective passive ventilation. The air carrying heat is then discharged from the outlet at the other end of the heat dissipation through hole. This, together with the circumferential air cooling channel 5, forms a three-dimensional heat dissipation pattern of "circumferential cooling of the lamp tube and central cooling of the environment", ensuring that the entire lamp cover body 1 is in a uniform and low-temperature working environment.

[0024] In a preferred embodiment, this utility model can be further configured as follows: Figure 2 , Figure 5As shown; the outer wall of the lampshade body 1 is provided with a cleaning ring 10 that slides along its axial direction, wherein the inner side of the cleaning ring 10 is provided with a scraping part 11 that matches the contour of the outer wall of the lampshade body 1; when the equipment is working normally, the cleaning ring 10 is usually stationary at one end of the axial direction of the lampshade body 1, which does not affect the operation and heat dissipation of the equipment; when cleaning is required, the operator does not need to use tools or complicated disassembly, but only needs to manually push the cleaning ring 10. The cleaning ring 10 relies on the scraping part 11 on its inner side to maintain close contact with the outer wall of the lampshade body 1 and slides along the axial direction of the lampshade body 1. During the sliding process, the scraping part 11 will scrape off all loose contaminants, such as dust, fibers, oil droplets, residual solidified material particles, etc., attached to the outer wall of the lampshade body 1. After cleaning, the cleaning ring 10 is pushed back to the initial position, ready for the next use.

[0025] In a preferred embodiment, this utility model can be further configured as follows: Figure 2 As shown; a ventilation mesh plate 12 is embedded on the end cap 2, and the ventilation mesh plate 12 is connected to the air cooling channel 5 and the heat dissipation through hole respectively; the ventilation mesh plate 12 is the channel for cooling airflow to enter and exit the lamp cover. The ventilation mesh plate 12 acts as a fixed filter and protective barrier to prevent foreign objects such as metal shavings, plastic pieces, and large fiber clumps that may float in the air from being sucked into the lamp cover by the centrifugal fan 6, effectively preventing foreign objects from entering, protecting the internal precision and high-speed operating components, and greatly improving the reliability and safety of the entire lamp cover structure.

[0026] In a preferred embodiment, this utility model can be further configured as follows: Figure 1 As shown; a moving component 13 is installed on the side of the end cover 2 away from the lampshade body 1. The moving component 13 includes a fixed base 1301, wherein one side of the fixed base 1301 is fixedly connected to the end cover 2 through multiple connecting rods 1302; multiple telescopic support arms 1303 with rollers 1304 are provided on the side of the fixed base 1301 away from the connecting rods 1302; there are three telescopic support arms 1303 arranged radially, wherein the telescopic support arms 1303 provide a stable mounting point for the rollers 1304 away from the center of the lampshade, thereby forming a wide support surface, enhancing the stability of the entire UV curing machine against tipping and shaking during movement, and ensuring that the UV curing machine maintains extremely high reliability and motion accuracy in high-speed, high-frequency, long-stroke reciprocating motion. It is a dedicated motion actuator that perfectly balances the flexibility during movement with the absolute stability and safety during operation.

[0027] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. A lampshade structure for an ultraviolet curing machine, comprising a lampshade body (1) and an ultraviolet light source disposed within the lampshade body (1), wherein end caps (2) are respectively disposed at both ends of the lampshade body (1); characterized in that, The lampshade body (1) is provided with a reflector (3) coaxially arranged inside, wherein the outer wall of the reflector (3) abuts against the inner wall of the lampshade body (1); the outer surface of the reflector (3) is provided with a plurality of axially extending reflector grooves (4) along its circumference, and the reflector grooves (4) and the inner wall of the lampshade body (1) form an axially extending air-cooling channel (5); a centrifugal fan (6) is installed on one side of the end cover (2), wherein the air outlet of the centrifugal fan (6) penetrates the side wall of the end cover (2) and communicates with the air-cooling channel (5) for delivering cooling airflow into the air-cooling channel (5).

2. The lampshade structure of a UV curing machine according to claim 1, characterized in that, The cross-section of the lampshade body (1) is a regular polygon, the number of the reflective grooves (4) is the same as the number of sides of the lampshade body (1), and the opening of each reflective groove (4) faces a plane of the inner wall of the lampshade body (1).

3. The lampshade structure of a UV curing machine according to claim 2, characterized in that, The lampshade body (1) is a regular octagon, and the outer surface of the reflector tube (3) is provided with eight reflector grooves (4); the openings of the reflector grooves (4) correspond to the plane of the inner wall of the lampshade body (1), so that the reflector grooves (4) and the inner wall of the lampshade body (1) form eight air-cooling channels (5).

4. The lampshade structure of a UV curing machine according to claim 1, characterized in that, The ultraviolet light source includes multiple sets of ultraviolet lamp modules (7), which are arranged one-to-one in the reflective groove (4), wherein the ultraviolet lamp modules (7) are evenly distributed along the inner wall plane of the lamp cover body (1).

5. The lampshade structure of a UV curing machine according to claim 1, characterized in that, The cross-section of the reflective groove (4) is an arc-shaped structure with the concave surface facing the central axis of the reflective tube (3), and its inner surface is provided with a reflective film layer (8).

6. The lampshade structure of a UV curing machine according to claim 1, characterized in that, The reflector tube (3) has an axially penetrating heat dissipation hole in its center. The inner wall of the heat dissipation hole is provided with a number of heat dissipation fins (9) extending axially. Each heat dissipation fin (9) is fixedly connected to the inner wall of the heat dissipation hole by thermal grease.

7. The lampshade structure of a UV curing machine according to claim 1, characterized in that, The outer wall of the lampshade body (1) is provided with a cleaning ring (10) that slides along its axial direction, and the inner side of the cleaning ring (10) is provided with a scraping part (11) that matches the contour of the outer wall of the lampshade body (1).

8. The lampshade structure of a UV curing machine according to claim 1, characterized in that, The end cap (2) is fitted with a ventilation mesh plate (12), which is connected to the air-cooled flow channel (5) and the heat dissipation through hole respectively.

9. The lampshade structure of a UV curing machine according to claim 1, characterized in that, A movable component (13) is installed on the side of the end cap (2) away from the lampshade body (1). The movable component (13) includes a fixed base (1301), wherein one side of the fixed base (1301) is fixedly connected to the end cap (2) through multiple connecting rods (1302); the side of the fixed base (1301) away from the connecting rods (1302) is provided with multiple telescopic support arms (1303) with rollers (1304).

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