A kind of scraping device convenient for fourier transform infrared spectrometer to detect asphalt

Abstract

The utility model discloses a kind of scraping device of Fourier transform infrared spectrometer for facilitating asphalt detection, it is related to asphalt detection technical field, to solve the current handheld metal scraper can form local over-thickness or over-thin film, destroy the technical problem of thickness consistency, including briquetting and pressure lever, the pressure lever is fixedly installed in briquetting outside, and with briquetting forms U-shaped structure, briquetting inside is provided with scraping mechanism, the inside of the pressure lever is provided with guiding mechanism. The utility model is through design bottom layer limiting groove, horizontally extends and limits scraper working path, the scraping path of scraper is positioned, avoid the pressure of scraper to asphalt to be formed from big to small due to operator hand shake, let the film quality of multiple scraping be kept consistent, and high layer limiting groove is at return time, and the bottom surface of scraper and window piece surface form isolation gap, solve the current handheld metal scraper can form local over-thickness or over-thin film, destroy thickness consistency problem.

Description

Technical Field

[0001] This utility model relates to the field of asphalt testing technology, and more specifically, to a scraping device that facilitates the detection of asphalt by a Fourier transform infrared spectrometer. Background Technology

[0002] Fourier transform infrared spectroscopy (FTIR) technology can accurately determine the brand characteristics of base asphalt and the SBS (styrene-butadiene-styrene block copolymer) content in modified asphalt by analyzing the infrared absorption spectrum of asphalt molecules. This detection method places extremely high demands on the preparation of asphalt samples: a thin film of uniform thickness and smooth surface must be formed on a zinc selenide or potassium bromide window; otherwise, fluctuations in film thickness or surface defects will lead to spectral signal scattering and uneven absorption, directly affecting the accuracy and repeatability of the test results.

[0003] In existing technologies, a handheld metal scraper is required to scrape the asphalt onto the window surface based on experience. This reliance on the operator's feel leads to inconsistent pressure on the asphalt, resulting in locally excessively thick or thin films, disrupting thickness consistency. Differences in thickness from multiple samples of the same material reduce spectral correlation, making repeatability tests impossible and increasing the uncertainty of the detection results. Therefore, we propose a scraping device that facilitates asphalt detection using a Fourier transform infrared spectrometer. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology, adapt to practical needs, and provide a scraping device that facilitates the detection of asphalt by a Fourier transform infrared spectrometer, so as to solve the technical problem that the current handheld metal scraper will form a film that is too thick or too thin in some areas, which will destroy the uniformity of thickness.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a scraping device for facilitating the detection of asphalt by a Fourier transform infrared spectrometer, comprising a pressure block and a pressure rod, wherein the pressure rod is fixedly installed on the outside of the pressure block and forms a U-shaped structure with the pressure block, a scraping mechanism is provided inside the pressure block, and a guiding mechanism is provided on the inner side of the pressure rod; the scraping mechanism includes a scraper, wherein the scraper has a straight cutting edge in the middle, and the two sides are arc-shaped and the end is bent inward to form a hook-shaped structure; the guiding mechanism includes a bottom limiting groove that extends horizontally and limits the working path of the scraper, a top limiting groove that is parallel to the bottom limiting groove, and a first connection and a second connection that connect the two grooves and force the limiting column to rise or fall.

[0006] Preferably, the scraping mechanism further includes a spring, which is fixedly installed inside the pressure block. A pinch block is fixedly installed at the end of the spring away from the inner wall of the pressure block. An X-shaped connecting rod is rotatably installed inside the pinch block. The end of the X-shaped connecting rod away from the pinch block is movably installed inside the fixed frame. Limiting posts are fixedly installed on both sides of the fixed frame and are located inside the bottom limiting groove. The scraper is fixedly installed on the pushing end of the fixed frame by bolts. A rack is fixedly installed at the bottom of the scraper. A gear is rotatably installed inside the pressure rod. A cleaning brush is fixedly installed inside the gear.

[0007] Preferably, the bottom limiting groove, the top limiting groove, and the extension groove are all formed on the inner wall of the pressure rod, and the extension groove is connected to the bottom limiting groove and extends to the gear area.

[0008] Preferably, when the limiting post slides into the extension groove, it pushes the rack and gear to mesh, and the bristles of the cleaning brush come into contact with the scraper surface.

[0009] Preferably, when the limiting post moves within the high-rise limiting groove, the bottom surface of the scraper forms an isolation gap with the surface of the window slab.

[0010] Preferably, the first connection is a ramp structure, which guides the limiting post to slide from the bottom limiting groove into the upper limiting groove; the second connection is a stepped structure, which forces the limiting post to descend from the upper limiting groove back to the bottom limiting groove.

[0011] Preferably, the pinch block is slidably mounted inside the pressure block, and the X-shaped connecting rod rotates on the pushing side and is slidably mounted inside the fixed frame.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. This utility model, through its designed bottom limiting groove, extends horizontally and limits the working path of the scraper, thus limiting the scraping path of the scraper and avoiding inconsistent thickness caused by the operator's hand tremors leading to fluctuating pressure on the asphalt. This ensures that the quality of the film after multiple scrapings remains consistent. Furthermore, the top limiting groove forces the bottom surface of the scraper to form an isolation gap with the surface of the window during the return stroke, cutting off the return contact between the scraper and the asphalt and preventing secondary dragging of the asphalt film during reciprocating scraping. This allows the asphalt film to be formed in one go, solving the problem of the current handheld metal scraper causing localized excessively thick or thin films, which disrupts the consistency of thickness.

[0014] 2. This utility model also uses a scraper with a straight blade in the middle, arc-shaped sides, and hook-shaped ends that bend inwards to guide excess asphalt from the edges towards the center during scraping, preventing asphalt from accumulating at the edges of the window slat. The straight blade fits snugly against the surface of the window slat, ensuring that the middle part of the asphalt film always maintains a consistent thickness. This further solves the problem that current handheld metal scrapers can create films that are either too thick or too thin in certain areas, thus compromising the consistency of the thickness. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is an exploded structural diagram of the present invention;

[0017] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0018] Figure 4 This is a schematic diagram of the coating mechanism of this utility model;

[0019] Figure 5 This is a schematic diagram of the guiding mechanism structure of this utility model.

[0020] The following are the labels in the diagram: 1. Base plate; 2. Scraping mechanism; 21. Spring; 22. Pinch block; 23. X-shaped connecting rod; 24. Fixing frame; 25. Scraper; 26. Rack; 27. Limiting post; 28. Gear; 29. ​​Cleaning brush; 3. Guide mechanism; 31. Bottom limiting groove; 32. Upper limiting groove; 33. Extension groove; 34. First connection; 35. Second connection; 4. Pressing block; 41. Pressing rod; 5. Handle; 6. Limiting block; 7. Gasket; 8. Magnet. Detailed Implementation

[0021] like Figures 1 to 5As shown, this utility model relates to a scraping device for detecting asphalt using a Fourier transform infrared spectrometer, comprising a pressure block 4 and a pressure rod 41. The pressure rod 41 is fixedly installed on the outside of the pressure block 4 and forms a U-shaped structure with the pressure block 4. A scraping mechanism 2 is provided inside the pressure block 4, and a guide mechanism 3 is provided on the inner side of the pressure rod 41. The scraping mechanism 2 includes a scraper 25, which has a straight cutting edge in the middle, arc-shaped sides, and a hook-shaped structure at the end. The guide mechanism 3 includes a bottom limiting groove 31, which extends horizontally and limits the working path of the scraper 25; a top limiting groove 32, which is parallel to the bottom limiting groove 31; a first connection 34 and a second connection 35, which connect the two grooves and force the limiting column 27 to rise or fall. The first connection 34 is a ramp structure, which guides the limiting column 27 to slide from the bottom limiting groove 31 into the top limiting groove 32; the second connection 35 is a stepped structure, which forces the limiting column 27 to fall back from the top limiting groove 32 to the bottom limiting groove. When the limiting post 27 moves within the upper limiting groove 32, the bottom surface of the scraper 25 forms an isolation gap with the surface of the window slab. The lower limiting groove 31, the upper limiting groove 32, and the extension groove 33 are all opened on the inner wall of the pressure rod 41. The extension groove 33 is connected to the lower limiting groove 31 and extends to the gear 28 area. This utility model, by designing the lower limiting groove 31, extends horizontally and limits the working path of the scraper 25, limiting the scraping path of the scraper 25, avoiding inconsistent thickness caused by the operator's hand shaking due to the pressure of the scraper 25 on the asphalt fluctuating, and ensuring that the quality of the film after multiple scrapings is consistent. The upper limiting groove 32 forces the bottom surface of the scraper 25 to form an isolation gap with the surface of the window slab during the return stroke, cutting off the return contact between the scraper 25 and the asphalt, preventing secondary dragging of the asphalt film during reciprocating scraping, and allowing the asphalt film to be formed in one go. This solves the problem that the current handheld scraper 25 will form a film that is too thick or too thin in some places, which will destroy the consistency of thickness.

[0022] Furthermore, such as Figures 3 to 4As shown, the scraping mechanism 2 also includes a spring 21, which is fixedly installed inside the pressure block 4. A pinch block 22 is fixedly installed at the end of the spring 21 away from the inner wall of the pressure block 4. An X-shaped connecting rod 23 is rotatably installed inside the pinch block 22. The end of the X-shaped connecting rod 23 away from the pinch block 22 is movably installed inside the fixed frame 24. The pinch block 22 is slidably installed inside the pressure block 4, and the X-shaped connecting rod 23 rotates and slides on the pushing side inside the fixed frame 24. Limiting posts 27 are fixedly installed on both sides of the fixed frame 24 and are located inside the bottom limiting groove 31. The scraper 25 is fixedly installed on the pushing end of the fixed frame 24 by bolts. A rack 26 is fixedly installed at the bottom of the scraper 25. A gear 28 is rotatably mounted on the inner side of the rod 41, and a cleaning brush 29 is fixedly mounted on the inner side of the gear 28. When the limiting post 27 slides into the extension groove 33, it pushes the rack 26 to mesh with the gear 28, and the bristles of the cleaning brush 29 contact the surface of the scraper 25. This utility model also uses a scraper 25 with a straight blade in the middle, arc-shaped sides and hook-shaped ends that bend inward to guide excess asphalt at the edge towards the center during scraping, avoiding asphalt accumulation at the edge of the window slab. The straight blade is in close contact with the surface of the window slab, which can ensure that the middle part of the asphalt film always maintains a consistent thickness, further solving the problem that the current handheld scraper 25 will form a film that is too thick or too thin in some places, which will destroy the consistency of thickness.

[0023] It should be noted that a limiting block 6 is fixedly installed on the outer side of the base plate 1, which limits the base plate 1 to the heating table. The pressure block 4 is rotatably installed on the base plate 1 via a hinge. A handle 5 is fixedly installed on the top of the pressure block 4. A placement groove is opened at the corresponding position of the base plate 1 and the gasket 7, so that the gasket 7 can be placed in the placement groove. The pressure block 4 and the pressure rod 41 are used to flatten the gasket 7. The magnet 8 is embedded in the base plate 1 to hold the pressure block 4 and the pressure rod 41, ensuring that the gasket 7 does not move or deform during the asphalt scraping process.

[0024] Working Principle: This embodiment provides a scraping device for easy detection of asphalt using a Fourier transform infrared spectrometer. In use, the base plate 1 is fixedly installed on the top of the heating table via the limiting block 6. The zinc selenide window is placed inside the central hole of the base plate 1, and the gasket 7 is placed inside the groove of the base plate 1, with the central hole of the gasket 7 corresponding to the central hole of the base plate 1. The pressure block 4 is hinged and rotated on the top of the base plate 1. By holding the handle 5 fixedly installed on the top of the pressure block 4, the pressure block 4 is flipped over, and the gasket 7 is pressed and fixed using the pressure block 4 and the pressure rod 41. Furthermore, the magnet 8 fixedly installed inside the base plate 1 is used to... The pressure bar 41 is magnetically fixed, and asphalt is dripped onto the inside of the scraper 25. The scraper 25 is flat in the middle, with arc-shaped sides and inward hooks at both ends. The pinch block 22 is pushed inward from both sides, stretching the spring 21 to store energy. The pinch block 22 squeezes the X-shaped connecting rod 23 inward, which in turn pushes the fixed frame 24. The limiting posts 27 on both sides of the fixed frame 24 slide within the bottom limiting groove 31 opened on the inside of the pressure bar 41, which in turn pushes the scraper 25 into the zinc selenide window inside the center hole of the gasket 7, thus obtaining a thin asphalt sheet of uniform thickness and size.

[0025] When the limiting post 27 slides inside the bottom limiting groove 31 and enters the extension groove 33, the rack 26 meshes with the gear 28, causing the gear 28 to rotate, which in turn causes the gear 28 to drive the cleaning brush 29 to rotate, so that the cleaning brush 29 can perform a brushing operation on the surface of the scraper 25.

[0026] After releasing the pinch block 22, the spring 21 rebounds, pulling the fixing frame 24 back via the X-shaped connecting rod 23. When the limiting post 27 enters the bottom limiting groove 31 from the extension groove 33, because the bottom limiting groove 31 is higher than the top limiting groove 32 at the first connection 34 between the bottom limiting groove 31 and the top limiting groove 32, the limiting post 27 enters the interior of the top limiting groove 32 along the first connection 34. This causes the bottom of the scraper 25 to detach from the pad 7, preventing reciprocating scraping of the zinc selenide window slats and preventing the scraper 25 from dragging the already laid asphalt layer again during the return stroke. The asphalt layer may accumulate or stretch locally due to viscous resistance, which will disrupt the uniformity of thickness. Moreover, the back-and-forth friction can easily introduce air and form bubbles, affecting the transmittance of infrared spectroscopy detection. When the limiting post 27 reaches the second connection 35 between the bottom limiting groove 31 and the top limiting groove 32, because the height of the top limiting groove 32 is higher than the height of the bottom limiting groove 31, the limiting post 27 returns to the position of the bottom limiting groove 31, which facilitates unidirectional scraping of asphalt. The one-time extrusion action of the scraper 25 can be used to spread the asphalt evenly on the surface of the window slab, avoiding thickness fluctuations caused by reciprocating disturbances.

[0027] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of this utility model based on the above embodiments and make different extensions and variations. However, as long as they do not depart from the spirit of this utility model, they are all within the protection scope of this utility model.

Claims

1. A scraping device for facilitating the detection of asphalt using a Fourier transform infrared spectrometer, comprising a pressure block (4) and a pressure rod (41), characterized in that, The pressure rod (41) is fixedly installed on the outside of the pressure block (4) and forms a U-shaped structure with the pressure block (4). The pressure block (4) is provided with a scraping mechanism (2), and the pressure rod (41) is provided with a guide mechanism (3). The scraping mechanism (2) includes a scraper (25), which has a straight cutting edge in the middle, arc-shaped sides, and an inwardly curved end to form a hook-shaped structure. The guide mechanism (3) includes a bottom limiting groove (31) that extends horizontally and limits the working path of the scraper (25), a top limiting groove (32) that is parallel to the bottom limiting groove (31), a first connection (34) and a second connection (35) that connect the two grooves and force the limiting column (27) to rise or fall.

2. The scraping device for detecting asphalt using a Fourier transform infrared spectrometer according to claim 1, characterized in that, The scraping mechanism (2) also includes a spring (21), which is fixedly installed inside the pressure block (4). A pinch block (22) is fixedly installed at one end of the spring (21) away from the inner wall of the pressure block (4). An X-shaped connecting rod (23) is rotatably installed inside the pinch block (22). The end of the X-shaped connecting rod (23) away from the pinch block (22) is movably installed inside the fixed frame (24). The limiting post (27) is fixedly installed on both sides of the fixed frame (24) and is located inside the bottom limiting groove (31). The scraper (25) is fixedly installed on the pushing end of the fixed frame (24) by bolts. A rack (26) is fixedly installed at the bottom of the scraper (25). A gear (28) is rotatably installed inside the pressure rod (41). A cleaning brush (29) is fixedly installed inside the gear (28).

3. The scraping device for facilitating the detection of asphalt by a Fourier transform infrared spectrometer according to claim 2, characterized in that, The bottom limiting groove (31), the top limiting groove (32) and the extension groove (33) are all opened on the inner wall of the pressure rod (41). The extension groove (33) is connected to the bottom limiting groove (31) and extends to the gear (28) area.

4. The scraping device for detecting asphalt using a Fourier transform infrared spectrometer according to claim 2, characterized in that, When the limiting post (27) slides into the extension groove (33), it pushes the rack (26) to mesh with the gear (28), and the bristles of the cleaning brush (29) come into contact with the surface of the scraper (25).

5. The scraping device for detecting asphalt using a Fourier transform infrared spectrometer according to claim 3, characterized in that, When the limiting post (27) moves within the high-rise limiting groove (32), the bottom surface of the scraper (25) forms an isolation gap with the surface of the window slab.

6. The scraping device for detecting asphalt using a Fourier transform infrared spectrometer according to claim 3, characterized in that, The first connection (34) is a ramp structure, which guides the limiting post (27) to slide from the bottom limiting groove (31) into the upper limiting groove (32). The second connection (35) is a stepped structure, which forces the limiting post (27) to descend from the upper limiting groove (32) back to the lower limiting groove (31).

7. The scraping device for detecting asphalt using a Fourier transform infrared spectrometer according to claim 2, characterized in that, The pinch block (22) is slidably mounted inside the pressure block (4), and the X-shaped connecting rod (23) rotates on the pushing side and is slidably mounted inside the fixed frame (24).

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