Improved cement fineness negative pressure screen analysis instrument

Abstract

The utility model relates to the technical field of cement fineness detection, and discloses an improved cement fineness negative pressure screen analysis instrument which comprises a cyclone tank, a filter plate is installed in the cyclone tank, a dust collection tank is installed at the lower end of the cyclone tank, a negative pressure mechanism is arranged on the right side of the cyclone tank, and a screen analysis mechanism is arranged on the left side of the cyclone tank. An anti-blocking mechanism is arranged below the filter plate in the cyclone tank; the cement powder is screened through the analysis screen, so that the cement powder with smaller particles passes through the analysis screen and falls into the dust collection tank through the gravity of the cement powder, and the cement powder with extremely small particles is discharged through the filter plate and is discharged into the water box; the negative pressure airflow impacts fan blades in the anti-blocking mechanism, the fan blades drive a brush to rotate through a rotating rod, the brush cleans the surface of a filter plate, cement powder which is small in mass, is sucked by negative pressure and cannot penetrate through the filter plate is prevented from being accumulated on the surface of the filter plate, and therefore blockage of the filter plate is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of cement fineness detection, in particular to an improved cement fineness negative pressure screening instrument. Background Art

[0002] Cement is an indispensable basic material in construction projects, and its fineness is one of the important indicators for evaluating cement quality. Cement fineness not only affects its physical properties, but is also directly related to the working performance and strength of concrete. Therefore, accurate detection of cement fineness is crucial.

[0003] In this context, a negative pressure sieving instrument for cement fineness came into being. This instrument uses the negative pressure principle to achieve rapid screening of cement by precisely controlling screening conditions and screening time. However, the existing negative pressure sieving instrument for cement fineness has the defect that the sieve holes of the sieve are easily clogged.

[0004] A Chinese patent discloses a negative pressure sieve analyzer for cement fineness (authorization announcement number CN212844865U). The patent technology is provided with a screen ball, and the blower blows air to the rotating screen ball, thereby improving the screening efficiency and reducing the blockage of the screen hole; a filter screen and a circular water tank are provided to reduce the backflow of cement dust and improve the screening efficiency;

[0005] However, it has certain disadvantages: although it can avoid the clogging of the screen ball, it cannot avoid the clogging of the filter. During the negative pressure screening process, some cement powder with small mass is attracted by the negative pressure but cannot pass through the filter. It is easy to accumulate on the surface of the filter, which can easily lead to the clogging of the filter. Utility Model Content

[0006] The utility model aims to provide an improved cement fineness negative pressure screening instrument to solve the problems raised in the above background technology.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] An improved cement fineness negative pressure screening instrument comprises a cyclone tank, a filter plate is installed inside the cyclone tank, and a dust collecting tank is installed at the lower end of the cyclone tank, a negative pressure mechanism is arranged on the right side of the cyclone tank, and a screening mechanism is arranged on the left side of the cyclone tank, an anti-blocking mechanism is arranged inside the cyclone tank below the filter plate, and the anti-blocking mechanism comprises a mounting seat, a bearing sleeve is installed on the upper surface of the mounting seat, a rotating rod is installed inside the bearing sleeve, a fan blade is installed at the lower end of the rotating rod, and a brush is installed at the upper end of the rotating rod.

[0009] As a further solution of the utility model: the negative pressure mechanism includes a negative pressure fan, a first air duct is connected to the left side of the negative pressure fan, a second air duct is connected to the front side of the negative pressure fan, and a water box is installed in front of the negative pressure fan.

[0010] As a further solution of the utility model: the screening mechanism includes a screening tank, a third air duct is installed at the lower end of the screening tank, and a tank cover is installed at the upper end of the screening tank, a motor is installed on the upper surface of the tank cover, an analysis sieve is installed at the output end of the motor, a hair dryer is installed on the upper surface of the tank cover on the right side of the motor, a blowing pipe is installed at the lower end of the hair dryer, and a blowing hole is opened on the left surface of the blowing pipe.

[0011] As a further solution of the utility model: a plurality of through holes are provided inside the mounting seat.

[0012] As a further solution of the utility model: two installation grooves are symmetrically provided on the upper surface of the rotating rod, magnetic blocks are installed inside the installation grooves, and two magnetic columns are symmetrically installed on the lower surface of the brush.

[0013] As a further solution of the utility model: the mounting seat is mounted on the left and right side surfaces inside the cyclone tank, and the brush is attached to the lower surface of the filter plate.

[0014] As a further solution of the utility model: one end of the first air duct penetrates and is connected to the upper surface of the cyclone tank, and one end of the second air duct is located inside the water box.

[0015] As a further solution of the utility model: the blowing hole is directly opposite to the analysis sieve, one end of the third air duct is connected to the left side surface of the cyclone tank, and the connection between the third air duct and the cyclone tank is located below the anti-blocking mechanism.

[0016] As a further solution of the utility model: the magnetic column is located inside the installation groove, and the magnetic column is attracted to the magnetic block.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] 1. The utility model screens cement powder through an analysis sieve, generates negative pressure through a negative pressure mechanism, so that cement powder with smaller particles passes through and falls into a dust collecting tank by its own gravity, while cement powder with extremely small particles is discharged through a filter plate and discharged into a water box; the blowing hole blows air to the analysis sieve to avoid clogging of the sieve holes of the analysis sieve.

[0019] 2. The utility model is provided with an anti-blocking mechanism. The negative pressure airflow impacts the fan blades in the anti-blocking mechanism. The fan blades drive the brush to rotate through the rotating rod. The surface of the filter plate is cleaned by the brush to prevent the cement powder with small mass that is attracted by the negative pressure but cannot pass through the filter plate from accumulating on the surface of the filter plate, thereby avoiding the blockage of the filter plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of an improved cement fineness negative pressure sieving instrument;

[0021] Figure 2 It is a partial cross-sectional view of a cyclone tank in an improved cement fineness negative pressure sieving instrument;

[0022] Figure 3 It is an exploded view of the screening mechanism in an improved cement fineness negative pressure screening instrument;

[0023] Figure 4 It is a structural schematic diagram of an anti-blocking mechanism in an improved cement fineness negative pressure sieving instrument;

[0024] Figure 5 for Figure 4 Partial exploded view.

[0025] In the figure: 1. cyclone tank; 2. filter plate; 3. dust collecting tank; 4. negative pressure mechanism; 5. negative pressure fan; 6. first air duct; 7. second air duct; 8. water box; 9. screening mechanism; 10. screening tank; 11. third air duct; 12. tank cover; 13. motor; 14. analysis sieve; 15. hair dryer; 16. blowing pipe; 17. blowing hole; 18. anti-blocking mechanism; 19. mounting seat; 20. bearing sleeve; 21. rotating rod; 22. fan blade; 23. brush; 24. through hole; 25. mounting slot; 26. magnetic block; 27. magnetic column. DETAILED DESCRIPTION

[0026] See also Figures 1 to 3In the embodiment of the utility model, an improved cement fineness negative pressure screening instrument comprises a cyclone tank 1, a filter plate 2 is installed inside the cyclone tank 1, and a dust collecting tank 3 is installed at the lower end of the cyclone tank 1, a negative pressure mechanism 4 is arranged on the right side of the cyclone tank 1, and the negative pressure mechanism 4 comprises a negative pressure fan 5, a first air duct 6 is connected to the left side of the negative pressure fan 5, one end of the first air duct 6 is connected to the upper surface of the cyclone tank 1, a second air duct 7 is connected to the front side of the negative pressure fan 5, a water box 8 is installed in front of the negative pressure fan 5, and one end of the second air duct 7 is located at the water box 8 Inside the cyclone tank 1, a screening mechanism 9 is arranged on the left side, the screening mechanism 9 comprises a screening tank 10, a third air duct 11 is installed at the lower end of the screening tank 10, and a tank cover 12 is installed at the upper end of the screening tank 10, a motor 13 is installed on the upper surface of the tank cover 12, an analysis sieve 14 is installed at the output end of the motor 13, a hair dryer 15 is installed on the upper surface of the tank cover 12 located on the right side of the motor 13, a blow pipe 16 is installed at the lower end of the hair dryer 15, a blow hole 17 is opened on the left surface of the blow pipe 16, and the blow hole 17 is directly opposite to the analysis sieve 14;

[0027] The negative pressure fan draws air, so that negative pressure is generated inside the cyclone tank 1 and the sieve tank 10;

[0028] The upper end of the analysis sieve 14 can be opened, and the cement powder to be screened is placed inside the analysis sieve 14; the analysis sieve 14 screens the cement powder and allows cement powder with smaller particles to pass through, and the blowing holes 17 blow air to the analysis sieve 14 to blow off the cement powder stuck in the sieve holes;

[0029] Cement powder with smaller particles is blocked by the filter plate 2 and falls into the dust collecting tank 3 by its own gravity. Cement powder with extremely small particles passes through the filter plate 2 and is sucked into the water box 8. The water in the water box 8 is used to absorb the cement powder and prevent the cement powder from being emitted into the surrounding air.

[0030] exist Figure 1 , Figure 2 and Figure 4 Middle: An anti-blocking mechanism 18 is provided inside the cyclone tank 1 below the filter plate 2, one end of the third air duct 11 penetrates and is connected to the left surface of the cyclone tank 1, and the connection between the third air duct 11 and the cyclone tank 1 is located below the anti-blocking mechanism 18, and the anti-blocking mechanism 18 includes a mounting seat 19, the mounting seat 19 is mounted on the left and right side surfaces inside the cyclone tank 1, a bearing sleeve 20 is mounted on the upper surface of the mounting seat 19, a rotating rod 21 is mounted inside the bearing sleeve 20, a fan blade 22 is mounted at the lower end of the rotating rod 21, and a brush 23 is mounted at the upper end of the rotating rod 21, and the brush 23 is attached to the lower surface of the filter plate 2;

[0031] The negative pressure airflow drives the fan blades 22 to rotate, thereby driving the brush 23 to clean the surface of the filter plate 2, preventing some cement powder with small mass that is attracted by the negative pressure but cannot pass through the filter plate 2 from accumulating on the surface of the filter plate 2.

[0032] exist Figure 4 Middle: A plurality of through holes 24 are provided inside the mounting seat 19;

[0033] The through hole 24 allows the negative pressure airflow to act on the fan blade 22 more easily, thereby accelerating the rotation of the fan blade 22 .

[0034] exist Figure 4 and Figure 5 Middle: Two mounting grooves 25 are symmetrically provided on the upper surface of the rotating rod 21, and a magnetic block 26 is installed inside the mounting groove 25. Two magnetic columns 27 are symmetrically installed on the lower surface of the brush 23. The magnetic columns 27 are located inside the mounting groove 25, and the magnetic columns 27 are attracted to the magnetic block 26;

[0035] Pulling the brush 23 separates the magnetic block 26 from the magnetic column 27, making it easier to clean or replace the brush 23.

[0036] The working principle of the utility model is as follows: when in use, cement powder is placed in the analysis sieve 14, the tank cover 12 is covered, the motor 13 is turned on to drive the analysis sieve 14 to rotate, so that the cement powder with smaller particles in the analysis sieve falls down, the negative pressure fan 5 draws air to generate negative pressure, and the cement powder with smaller particles enters the cyclone tank 1 through the negative pressure, and then falls into the dust collecting tank 3 by its own gravity, and the cement powder with extremely small particles is sucked into the water box 8 through the filter plate 2; the negative pressure airflow impacts the fan blade 22 to make it rotate, and the fan blade 22 drives the rotating rod 21 to rotate, thereby driving the brush 23 to clean the surface of the filter plate 2; after the sieving is completed, the mass of the cement powder remaining in the analysis sieve 14 is counted, compared with the initial mass of the cement powder, and the fineness of the cement is calculated.

[0037] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An improved cement fineness negative pressure screening instrument, comprising a cyclone tank (1), a filter plate (2) installed inside the cyclone tank (1), a dust collecting tank (3) installed at the lower end of the cyclone tank (1), a negative pressure mechanism (4) arranged on the right side of the cyclone tank (1), and a screening mechanism (9) arranged on the left side of the cyclone tank (1), characterized in that: An anti-blocking mechanism (18) is provided inside the cyclone tank (1) and below the filter plate (2). The anti-blocking mechanism (18) comprises a mounting seat (19). A bearing sleeve (20) is mounted on the upper surface of the mounting seat (19). A rotating rod (21) is mounted inside the bearing sleeve (20). A fan blade (22) is mounted at the lower end of the rotating rod (21), and a brush (23) is mounted at the upper end of the rotating rod (21).

2. The improved cement fineness negative pressure sieving instrument according to claim 1, characterized in that: The negative pressure mechanism (4) comprises a negative pressure fan (5), the left side of the negative pressure fan (5) is connected to a first air duct (6), the front side of the negative pressure fan (5) is connected to a second air duct (7), and a water box (8) is installed in front of the negative pressure fan (5).

3. The improved cement fineness negative pressure sieving instrument according to claim 1, characterized in that: The sieving mechanism (9) comprises a sieving tank (10), a third air duct (11) being mounted at the lower end of the sieving tank (10), and a tank cover (12) being mounted at the upper end of the sieving tank (10), a motor (13) being mounted on the upper surface of the tank cover (12), an analysis sieve (14) being mounted at the output end of the motor (13), a hair dryer (15) being mounted on the upper surface of the tank cover (12) on the right side of the motor (13), a blow pipe (16) being mounted at the lower end of the blow pipe (15), and a blow hole (17) being provided on the left side surface of the blow pipe (16).

4. The improved cement fineness negative pressure sieving instrument according to claim 1, characterized in that: A plurality of through holes (24) are provided inside the mounting seat (19).

5. The improved cement fineness negative pressure sieving instrument according to claim 1, characterized in that: Two installation grooves (25) are symmetrically provided on the upper surface of the rotating rod (21), a magnetic block (26) is installed inside the installation groove (25), and two magnetic columns (27) are symmetrically installed on the lower surface of the brush (23).

6. The improved cement fineness negative pressure sieving instrument according to claim 1, characterized in that: The mounting seat (19) is mounted on the left and right side surfaces inside the cyclone tank (1), and the brush (23) is attached to the lower surface of the filter plate (2).

7. The improved cement fineness negative pressure sieving instrument according to claim 2, characterized in that: One end of the first air duct (6) penetrates and is connected to the upper surface of the cyclone tank (1), and one end of the second air duct (7) is located inside the water box (8).

8. The improved cement fineness negative pressure sieving instrument according to claim 3, characterized in that: The blowing hole (17) is directly opposite to the analysis sieve (14), one end of the third air duct (11) penetrates and is connected to the left surface of the cyclone tank (1), and the connection between the third air duct (11) and the cyclone tank (1) is located below the anti-blocking mechanism (18).

9. The improved cement fineness negative pressure sieving instrument according to claim 5, characterized in that: The magnetic column (27) is located inside the installation groove (25), and the magnetic column (27) is attracted to the magnetic block (26).

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