Cement fineness negative pressure screen analysis instrument

Abstract

The utility model discloses a cement fineness negative pressure screen analysis instrument which comprises a main body and a screen seat positioned at the upper end of the main body, the screen cover is detachably connected with the negative pressure screen, the motor is detachably connected to the middle of the upper end of the screen cover, the rotating shaft is fixedly connected with the output end, penetrating through the screen cover, of the motor, the supporting rod is fixedly connected with the rotating shaft, and the two vertically-arranged scraping plates are fixedly connected to the two ends of the supporting rod. And the scraping plate is in contact with the inner peripheral wall of the negative-pressure screen. The cement powder measuring device has the advantages that the rotating shaft is driven by the motor, and the supporting rod on the rotating shaft drives the scraping plate to rotate, so that cement powder adhered to the inner circumferential wall of the negative-pressure screen can be effectively scraped and collected, and the accuracy of measuring precision is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of sieve analyzer technology, and in particular to a cement fineness negative pressure sieve analyzer. Background Technology

[0002] Cement fineness is a crucial indicator of cement quality, directly impacting hydration rate, strength development, and concrete workability. A cement fineness negative pressure sieve analyzer is a specialized instrument for determining the fineness of cement particles, primarily used to test the fineness of silicate cement, ordinary silicate cement, slag silicate cement, fly ash silicate cement, and composite silicate cement. However, in existing cement fineness negative pressure sieve analyzers, cement powder often adheres to the inner wall of the sieve during operation, severely affecting measurement accuracy and causing inaccurate results. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a cement fineness negative pressure sieve analyzer with high measurement accuracy.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0005] A cement fineness negative pressure sieve analyzer includes a main body and a sieve base located at the upper end of the main body, and also includes a negative pressure sieve, a sieve cover detachably connected to the negative pressure sieve, a motor detachably connected to the middle of the upper end of the sieve cover, a rotating shaft fixedly connected to the output end of the motor passing through the sieve cover, a support rod fixedly connected to the rotating shaft, and two vertically arranged scrapers fixedly connected to both ends of the support rod; the scrapers are in contact with the inner peripheral wall of the negative pressure sieve.

[0006] Furthermore, the support rod is fixedly connected to the upper end of the scraper.

[0007] Furthermore, there is a gap between the lower end of the scraper and the screen plane of the negative pressure screen.

[0008] Furthermore, the two scrapers are centrally symmetrically distributed, and one of the vertical edges of the scraper is a cutting edge that facilitates scraping off cement powder.

[0009] Furthermore, the main body includes an outer shell, a cyclone separator located inside the outer shell and connected to the screen seat via a pipe, a dust collection bottle detachably connected to the lower end of the cyclone separator, and a vacuum cleaner connected to the cyclone separator via a pipe.

[0010] Furthermore, sealing rings for sealing are provided between the screen base and the negative pressure screen, and between the negative pressure screen and the screen cover.

[0011] The beneficial effects of this utility model are:

[0012] The motor drives the rotating shaft, and the support rod on the shaft drives the scraper to rotate, which can effectively scrape off and collect the cement powder adhering to the inner wall of the negative pressure screen, ensuring the accuracy of the measurement. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the connection structure of the component located at the upper end of the screen base in this utility model;

[0015] Figure 3 for Figure 2 Sectional view at point AA.

[0016] In the picture,

[0017] 1-Main body, 2-Screen base, 3-Negative pressure screen, 4-Screen cover, 5-Motor, 6-Rotating shaft, 7-Support rod, 8-Scraper;

[0018] 11-Outer casing, 12-Cyclone, 13-Dust collection bottle, 14-Vacuum cleaner. Detailed Implementation

[0019] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0020] A cement fineness negative pressure sieve analyzer, referring to Figure 1-3 As shown, it includes a main body 1 and a screen base 2 located at the upper end of the main body 1, and also includes a negative pressure screen 3, a screen cover 4 detachably connected to the negative pressure screen 3, a motor 5 detachably connected to the middle of the upper end of the screen cover 4, a rotating shaft 6 fixedly connected to the output end of the motor 5 passing through the screen cover 4, a support rod 7 fixedly connected to the rotating shaft 6, and two vertically arranged scrapers 8 fixedly connected to both ends of the support rod 7; the scrapers 8 are in contact with the inner peripheral wall of the negative pressure screen 3.

[0021] It should be noted that the main body 1 is an existing structure, and those skilled in the art can easily understand its structure. The main body 1 includes an outer shell 11, a cyclone 12 located inside the outer shell 11 and connected to the screen base 2 via a pipe, a dust collection bottle 13 detachably connected to the lower end of the cyclone 12, and a vacuum cleaner 14 connected to the cyclone 12 via a pipe. The screen base 2 is located at the upper end of the main body 1 for connection with the negative pressure screen 3, and it is also equipped with an air jet nozzle as in the prior art; the screen cover 4 is used to seal the upper part; the rotating shaft 6 is driven by the motor 5, and the support rod 7 on the rotating shaft 6 drives the scraper 8 to rotate, which can effectively scrape off and collect the cement powder adhering to the inner peripheral wall of the negative pressure screen 3, ensuring the accuracy of the measurement.

[0022] To prevent the rotating shaft 6 from being too long and occupying the internal space of the negative pressure screen 3, and to prevent cement powder from being left on the support rod 7, the support rod 7 is fixedly connected to the upper end of the scraper 8.

[0023] The gap between the lower end of the scraper 8 and the screen surface of the negative pressure screen 3 can prevent the scraper 8 from damaging the screen.

[0024] To facilitate the scraping of cement powder by the scraper 8, the two scrapers 8 are centrally symmetrically distributed, and one of the vertical edges of the scraper 8 is a cutting edge that facilitates the scraping of cement powder; the rotation direction of the motor 5 should be towards the direction of the cutting edge of the scraper 8, or the scraper 8 can be constructed so that both vertical edges are cutting edges to ensure that the cement powder is scraped off.

[0025] To ensure airtightness, sealing rings are provided between the screen base 2 and the negative pressure screen 3, as well as between the negative pressure screen 3 and the screen cover 4.

[0026] The working principle of this utility model:

[0027] When the cement fineness negative pressure sieve analyzer is working, the motor 5 drives the rotating shaft 6, and the support rod 7 on the rotating shaft 6 drives the scraper 8 to rotate, which can effectively scrape off and collect the cement powder adhering to the inner wall of the negative pressure sieve 3, ensuring the accuracy of the measurement.

[0028] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.

Claims

1. A cement fineness negative pressure sieve analyzer, comprising a main body (1) and a sieve seat (2) located at the upper end of the main body (1), characterized in that: It also includes a negative pressure screen (3), a screen cover (4) detachably connected to the negative pressure screen (3), a motor (5) detachably connected to the middle of the upper end of the screen cover (4), a rotating shaft (6) fixedly connected to the output end of the motor (5) passing through the screen cover (4), a support rod (7) fixedly connected to the rotating shaft (6), and two vertically arranged scrapers (8) fixedly connected to both ends of the support rod (7); the scrapers (8) are in contact with the inner peripheral wall of the negative pressure screen (3).

2. The cement fineness negative pressure sieve analyzer according to claim 1, characterized in that: The support rod (7) is fixedly connected to the upper end of the scraper (8).

3. The cement fineness negative pressure sieve analyzer according to claim 1, characterized in that: There is a gap between the lower end of the scraper (8) and the screen plane of the negative pressure screen (3).

4. The cement fineness negative pressure sieve analyzer according to claim 1, characterized in that: The two scrapers (8) are centrally symmetrically distributed and one of the vertical edges of the scraper (8) is a blade edge that facilitates scraping off cement powder.

5. The cement fineness negative pressure sieve analyzer according to claim 1, characterized in that: The main body (1) includes a shell (11), a cyclone (12) located inside the shell (11) and connected to the screen seat (2) through a pipe, a dust collection bottle (13) detachably connected to the lower end of the cyclone (12), and a vacuum cleaner (14) connected to the cyclone (12) through a pipe.

6. The cement fineness negative pressure sieve analyzer according to any one of claims 1 to 5, characterized in that: Sealing rings for sealing are provided between the screen base (2) and the negative pressure screen (3) and between the negative pressure screen (3) and the screen cover (4).

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