Partitioned film removing tool for solar medium-high temperature heat collecting tube

Abstract

The utility model discloses a partitioned film removing tool for a solar medium-high temperature heat collecting tube, which comprises a baffle plate and two groups of locking clamps, the baffle plate is coated on the periphery of the heat collecting tube, and a gap is reserved between the baffle plate and the heat collecting tube; the two sets of locking clamps are fixed to the two ends of the shielding plate correspondingly and used for locking and fixing the two ends of the shielding plate and the heat collecting pipes. After the partition film removing tool is installed, the heat collecting pipe is partially shielded, so that partition film removing is achieved under irradiation of an ion source or laser, and two coatings with different properties exist on the surface of the heat collecting pipe.

Description

Technical Field

[0001] The utility model belongs to the field of heat collecting tube coatings, and particularly relates to a sectional film removing tooling for solar medium and high temperature heat collecting tubes. Background Technique

[0002] The heat collecting tube is a core component in a solar thermal power station, and its performance is directly related to the photothermal conversion efficiency. The coating on the surface of the heat collecting tube plays a crucial role. It has the characteristics of high solar absorptivity and low thermal emissivity. This coating can selectively absorb the short-wave components in solar radiation, such as visible light and near-infrared rays, and at the same time can minimize the long-wave heat energy radiated outward at high temperatures. With the development of technology, the performance of the coating has been significantly improved. However, in recent years, the improvement of coating performance has also encountered bottlenecks. One of the main limiting factors is the mutual influence between the absorption ratio and the emission ratio of the coating. Although high-performance surface antireflection layers and absorption layers can significantly increase the absorption ratio, this also leads to an increase in the emission ratio, thereby increasing heat loss.

[0003] In the application of heat collecting tubes in medium and high temperature trough solar power stations, high-concentration focusing technology is usually adopted for focusing. This technology focuses sunlight through reflectors, making the concentration ratio exceed 80 times. The sunlight is mainly reflected and converged onto the heat collecting tube through the reflectors. Specifically, the coating on the stainless steel tube facing the reflector absorbs most of the sunlight, so this part of the coating needs to have a high absorptivity. For the coating on the stainless steel tube on the side farther from the reflector, since it receives less sunlight, its absorptivity can be reduced to correspondingly reduce the emissivity, thereby effectively reducing heat loss. Content of the Utility Model

[0004] In order to realize the preparation of the double-coating structure of the heat collecting tube, the utility model provides a sectional film removing tooling for solar medium and high temperature heat collecting tubes. By installing the sectional film removing tooling on the outer periphery of the heat collecting tube and partially shielding the heat collecting tube, sectional film removal can be realized under the irradiation of an ion source or a laser, so that there are two different performance coatings on the surface of the heat collecting tube.

[0005] The main technical solution adopted in the utility model is as follows:

[0006] A sectional film removing tooling for solar medium and high temperature heat collecting tubes, comprising a shielding plate and two groups of locking clamps. Among them, the shielding plate is wrapped around the outer periphery of the heat collecting tube, and there is a gap between the shielding plate and the heat collecting tube; the two groups of locking clamps are respectively fixed at both ends of the shielding plate and are used to lock and fix both ends of the shielding plate to the heat collecting tube.

[0007] Preferably, a plurality of reinforcing ribs are arranged along the axial direction on the outer peripheral surface of the shielding plate.

[0008] Preferably, the shielding plate is divided into two sections along the circumferential direction of the heat collecting tube, and a plurality of hinge plates are arranged on the outer surface of each section of the shielding plate along the axial direction, and the hinge plates on each section of the shielding plate correspond to each other one by one, and the two sections of the shielding plate are hinged through the hinge plates.

[0009] Preferably, the radial cross-section of the shielding plate is an arc structure or a "└┘" structure.

[0010] Preferably, the area of the shielding plate is set according to the uncoated area on the heat collecting tube, and the ratio of the coated area to the uncoated area on the heat collecting tube is 1:4 - 1:2.

[0011] Preferably, the locking clamp includes a buckle section, a connecting section and a buckle connection section. Among them, one end of the buckle section is buckled and connected with the buckle connection section, and both ends of the connecting section are hinged to the buckle connection section and the buckle section respectively.

[0012] Beneficial effects: The utility model provides a partition film removal tooling for a solar medium-high temperature heat collecting tube, which has a simple structure and is convenient to use. It can effectively shield the parts that do not need to remove the coating during the ion source or laser irradiation process, so as to realize the partial removal of the coating, so that there are two different performance coatings on the surface of the heat collecting tube, which is beneficial to improving the thermal efficiency of the heat collecting tube. Description of the Drawings

[0013] Figure 1 is the overall structural schematic diagram of the partition film removal tooling of Embodiment 1;

[0014] Figure 2 is the axial cross-sectional schematic diagram of the partition film removal tooling of Embodiment 1

[0015] Figure 3 is Figure 1 the partial enlarged view of the locking clamp at A of

[0016] Figure 4 is Figure 1 the partial enlarged view of the hinge plate at B of

[0017] Figure 5 is Figure 2 the C-C cross-sectional schematic diagram of

[0018] Figure 6 is the partition film removal schematic diagram of Embodiment 1;

[0019] In the figure: shielding plate 1, reinforcing rib 1-1, hinge plate 1-2, locking clamp 2, buckle section 2-1, connecting section 2-2, buckle connection section 2-3, heat collecting tube 3, ion source device 4, gap 5. Detailed Embodiments

[0020] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application. Embodiment

[0021] A partition film removal tooling for solar medium and high temperature heat collecting tubes, as Figures 1-5 shown, includes a shielding plate 1 and two groups of locking clamps 2. Among them, the shielding plate 1 is wrapped around the outer periphery of the heat collecting tube 3 and has a gap 5 with the heat collecting tube 3; the two groups of the locking clamps 2 are respectively fixed at both ends of the shielding plate 1 and are used to lock and fix both ends of the shielding plate 1 to the heat collecting tube 3.

[0022] In this Embodiment 1, the radial cross-section of the shielding plate 1 is an arc structure, and the radius of the shielding plate 1 is greater than the radius of the heat collecting tube 3, ensuring that there is a gap between the two and they do not contact each other. In this utility model, the radial cross-section of the shielding plate 1 can be, but is not limited to, an arc structure, and can also be a "└┘" type structure.

[0023] In this Embodiment 1, a plurality of reinforcing ribs 1-1 are axially distributed on the outer peripheral surface of the shielding plate 1 for enhancing the deflection.

[0024] In this Embodiment 1, the shielding plate 1 is divided into two sections along the circumferential direction of the heat collecting tube 3, as Figure 4 shown. A plurality of hinge plates 1-2 are axially distributed on the outer surface of each section of the shielding plate 1, and the positions of the hinge plates 1-2 on each section of the shielding plate 1 correspond one by one. The two sections of the shielding plate 1 are hinged through the hinge plates 1-2. In this utility model, the "└┘" type shielding plate 1 is obtained by hinging two sections of L-shaped shielding plates 1.

[0025] In this utility model, the opening size of the shielding plate 1 needs to be determined according to the film removal area, that is, the shielding area of the shielding plate 1 is set according to the non-film-removed area on the heat collecting tube 3, and the ratio of the film removal area to the non-film-removed area on the heat collecting tube 3 is 1:4 - 1:2.

[0026] In this Embodiment 1, as Figure 3 shown, the locking clamp 2 includes a buckle section 2-1, a connecting section 2-2, and a buckle connecting section 2-3. Among them, one end of the buckle section 2-1 is buckled and connected to the buckle connecting section 2-3, and both ends of the connecting section 2-1 are respectively hinged to the buckle connecting section 2-3 and the buckle section 2-1, and are used to fix the shielding plate 1 to the heat collecting tubes at both ends, ensuring that there is no relative sliding between the two.

[0027] In this Embodiment 1, the connecting section 2-2 and the snap-connection section 2-3 are respectively welded to the ends of the two baffle plates 1.

[0028] Use the partition film removal tooling disclosed in Embodiment 1 to partially block the coating area of the heat collecting tube to achieve partition film removal. The specific steps are as follows:

[0029] S1: Using argon as the sputtering gas, adopt the magnetron sputtering process to magnetron sputter and deposit an anti-infrared reflection coating, a gradient absorption coating, and an anti-reflection coating in sequence on the entire heat collecting tube substrate; this coating has a relatively high absorption ratio.

[0030] S2: Lock and fix the baffle plates in the partition film removal tooling at both ends of the heat collecting tube to cover the non-film-removed areas on the heat collecting tube;

[0031] S3: Fix the heat collecting tube on the traveling and rotating mechanism, and drive the heat collecting tube to perform a linear reciprocating motion along the axis while rotating around its own central axis; among them, the heat collecting tube is located in the vacuum chamber for film removal operation;

[0032] S4: As Figure 6 shown, control the ion source device 4 or the laser device to irradiate the heat collecting tube with ions or lasers, so that the non-blocked coating area of the heat collecting tube is gradually removed to the required thickness, and only the anti-infrared reflection coating is retained. This coating has a relatively low emissivity. And the coating protected by the baffle plate 1 remains intact, that is, the partition film removal is completed. In order to ensure the uniformity of the film removal of the whole tube, the rotating and traveling mechanism drives the coated stainless steel tube to rotate while performing a linear reciprocating motion. In the present invention, the exposed coated part is gradually removed to the required thickness, while the coating protected by the baffle plate remains intact.

[0033] Using the partition coating tooling of the present invention, two heat collecting tube coatings with different properties can be obtained by physical etching on the original coating. Under the condition of ensuring relatively low cost, the heat collecting tube can have lower heat loss and better heat preservation performance.

[0034] In the present invention, the baffle plate 1 can be made of, but not limited to, materials such as carbon steel or stainless steel.

[0035] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and retouches can still be made, and these improvements and retouches should also be regarded as the protection scope of the present invention.

Claims

1. A partitioned film removal tooling for solar medium and high temperature heat collecting tubes, characterized in that, It includes a shielding plate and two sets of locking fixtures. Among them, the shielding plate is wrapped around the outer periphery of the heat collecting tube, and there is a gap between the shielding plate and the heat collecting tube; the two sets of locking fixtures are respectively fixed at both ends of the shielding plate and are used to lock and fix both ends of the shielding plate to the heat collecting tube.

2. The partition film removal tooling for the medium and high temperature solar heat collecting tube according to claim 1, characterized in that, A number of reinforcing ribs are arranged axially on the outer peripheral surface of the shielding plate.

3. The film removal tooling for the partition of the medium and high temperature solar heat collecting pipe according to claim 1, characterized in that, The shielding plate is divided into two sections along the circumferential direction of the heat collecting tube, and a number of hinge plates are arranged axially on the outer surface of each section of the shielding plate, and the positions of the hinge plates on each section of the shielding plate correspond one by one. The two sections of the shielding plate are hinged through the hinge plates.

4. The partitioned film removal tooling for the medium and high temperature solar heat collecting tube according to claim 1, characterized in that The radial cross-section of the shielding plate is an arc structure or a "└┘" structure.

5. The partition film removal tooling for medium and high temperature solar heat collecting tubes according to claim 1, characterized in that, The area of the shielding plate is set according to the non-film-removed area on the heat collecting tube, and the ratio of the film-removed area to the non-film-removed area on the heat collecting tube is 1:4 - 1:

2.

6. The partitioned film removal tooling for the medium and high temperature solar heat collecting tube according to claim 1, characterized in that, The locking fixture includes a buckle section, a connecting section and a buckle connecting section. Among them, one end of the buckle section is buckled and connected to the buckle connecting section, and both ends of the connecting section are respectively hinged to the buckle connecting section and the buckle section.

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