Cement standard negative pressure screen

Abstract

The utility model discloses a cement standard negative pressure screen which comprises a screen body, the upper end of the screen body is in threaded connection with an end cover, a driving motor is fixedly installed on the top face of the end cover, the output end of the driving motor extends into the screen body to be provided with a rotating rod, and the outer wall of the rotating rod is fixedly connected with a first connecting rod and a second connecting rod. A first dredging brush and a second dredging brush are installed at the ends, away from the rotating rod, of the first connecting rod and the second connecting rod correspondingly, the first dredging brush and the second dredging brush are both attached to the surface of a screen body, the screen body is arranged on a screen analysis instrument, and a wedging block is fixedly connected to the surface of the screen body; and a wedging groove is formed in a position, corresponding to the wedging block, of the surface of the screen analysis instrument. According to the screen body fixing device, the wedging block is arranged, and the wedging block is wedged with the wedging groove in the screen analysis instrument, so that the screen body can be quickly fixed on the screen analysis instrument, the convenience of disassembling and assembling the screen body is improved, and the screen body fixing device is simple and convenient to operate, low in production difficulty, simple in structure, high in practicability and worthy of popularization.

Description

Technical Field

[0001] The utility model relates to the technical field of negative pressure screens, in particular to a cement standard negative pressure screen. Background Art

[0002] The Cement Fineness Negative Pressure Sieve Analyzer is a specialized instrument for sieving tests in accordance with the national standard GB1345-91, "Test Method for Cement Fineness - 0.08mm Sieve Analyzer." It features a simple structure, easy operation, and low energy consumption, making it an essential instrument for cement plants, construction companies, scientific research institutes with cement expertise, and universities and colleges. Using airflow as the motive force for screening, the entire system maintains a negative pressure during operation. The fine powder material in the sieve is forced into a flow by the airflow ejected from the rotating nozzle, moving with the airflow. Fine particles smaller than the sieve aperture are carried through the sieve by the airflow and removed, while coarse particles larger than the sieve aperture remain in the sieve, achieving the desired screening effect. If a small cyclone dust collector is used in conjunction with the screening system, fine particles that pass through the sieve can be collected from the airflow, achieving a collection rate of over 90%, thereby reducing the number of vacuum cleaner cleanings required.

[0003] The existing technology has the following problems:

[0004] After extensive searching, it was found that the patent document with application number CN201720108609.X disclosed a cement fineness negative pressure sieve analyzer. However, there are still some problems in the actual use of the above patent. The most obvious one is that the operation of disassembling and assembling the test sieve is cumbersome and the structure is complex, resulting in high use and production costs.

[0005] To this end, we proposed a cement standard negative pressure screen to solve the above disadvantages. Utility Model Content

[0006] The utility model aims to provide a cement standard negative pressure screen in order to solve the shortcomings in the prior art.

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions: a cement standard negative pressure screen, comprising a screen body, the upper end of the screen body is threadedly connected to an end cover, and a drive motor is fixedly installed on the top surface of the end cover, the output end of the drive motor extends to the interior of the screen body and a rotating rod is installed, and the outer wall of the rotating rod is fixedly connected to a first connecting rod and a second connecting rod, the first connecting rod and the second connecting rod are respectively installed with a first dredging brush and a second dredging brush at the end away from the rotating rod, the first dredging brush and the second dredging brush are both fitted with the surface of the screen body, the screen body is arranged on a sieving instrument, the surface of the screen body is fixed with a fitting block, and a fitting groove is provided on the surface of the sieving instrument at the position corresponding to the fitting block, and the fitting groove and the fitting block are used in conjunction with each other.

[0008] Preferably, a sealing ring is installed on the sieve body, and the diameter of the sealing ring is smaller than the diameter of the sieve body.

[0009] Preferably, the drive motor is electrically connected to an external power source via a wire.

[0010] Preferably, there are multiple fitting blocks, and the multiple fitting blocks are distributed in a circular array on the upper end of the outer wall of the sieve body.

[0011] Preferably, there are multiple fitting grooves, and the multiple fitting grooves are distributed in a circular array on the surface of the sieve analyzer.

[0012] Preferably, a sealing gasket is provided between the end cover and the sieve body.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. In the present invention, a fitting block is provided, and by fitting the fitting block into the fitting groove on the sieve, the sieve body can be quickly fixed on the sieve body, thereby improving the convenience when disassembling and assembling the sieve body, and the operation is simple, and the production difficulty is low, the structure is simple, and the practicality is strong, so it is worthy of promotion.

[0015] 2. The utility model provides a first rotating dredging brush and a second rotating dredging brush, which can dredge the screen body during use, reduce the risk of screen blockage, ensure screening effect and efficiency, and has strong practicality and is worthy of promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a cross-sectional view of a cement standard negative pressure screen proposed by the present utility model;

[0018] Figure 2 It is a bottom view of the sieve body;

[0019] Figure 3 Schematic diagram of the connection between the sieve body and the sieve analyzer.

[0020] Legend:

[0021] 1. Sieve body; 2. End cover; 3. Drive motor; 4. Rotating rod; 5. First connecting rod; 6. First dredging brush; 7. Second connecting rod; 8. Second dredging brush; 9. Sealing ring; 10. Fitting block; 11. Sieve analyzer; 12. Fitting groove. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or components referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention; the terms "first", "second", and "third" are only used for descriptive purposes and should not be understood as indicating or implying relative importance; in addition, unless otherwise expressly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or it can be internal communication between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] Please refer to Figure 1-3 A cement standard negative pressure screen comprises a screen body 1, an end cover 2 is threadedly connected to the upper end of the screen body 1, and a drive motor 3 is fixedly installed on the top surface of the end cover 2, the output end of the drive motor 3 extends to the interior of the screen body 1 and a rotating rod 4 is installed, and the outer wall of the rotating rod 4 is fixedly connected with a first connecting rod 5 and a second connecting rod 7, and the first connecting rod 5 and the second connecting rod 7 are respectively installed with a first dredging brush 6 and a second dredging brush 8 at the end away from the rotating rod 4, and the first dredging brush 6 and the second dredging brush 8 are both fitted with the surface of the screen body 1, and the screen body 1 is arranged on a sieving instrument 11, and a fitting block 10 is fixed to the surface of the screen body 1, and a fitting groove 12 is opened at the position of the fitting block 10 on the surface of the sieving instrument 11, and the fitting groove 12 and the fitting block 10 are used in conjunction with each other.

[0025] During use, by fitting the fitting block 10 into the fitting groove 12 on the sieving instrument 11, the sieve body 1 can be quickly fixed on the sieving instrument 11, thereby improving the convenience when disassembling and assembling the sieve body 1, and the operation is simple, and the production difficulty is low, the structure is simple, and the practicability is strong, which is worthy of promotion. Secondly, by setting the rotating first dredging brush 6 and the second dredging brush 8, the sieve body 1 can be dredged during use, reducing the risk of blockage of the sieve body 1, and ensuring the screening effect and efficiency. It is highly practical and worthy of promotion.

[0026] In this embodiment, a sealing ring 9 is installed on the sieve body 1 , and the diameter of the sealing ring 9 is smaller than the diameter of the sieve body 1 .

[0027] Specifically, the sealing performance of the connection between the sieve body 1 and the sieve analyzer 11 is improved to avoid the generation of gaps therebetween.

[0028] In this embodiment, the driving motor 3 is electrically connected to the external power supply via a wire.

[0029] Specifically, this is a common circuit connection structure, which will not be described in detail here.

[0030] In this embodiment, a plurality of fitting blocks 10 are provided, and the plurality of fitting blocks 10 are distributed in a circular array on the upper end of the outer wall of the sieve body 1 .

[0031] Specifically, the tightness of the connection between the sieve body 1 and the sieve analyzer 11 is improved.

[0032] In this embodiment, a plurality of fitting grooves 12 are provided, and the plurality of fitting grooves 12 are distributed in a circular array on the surface of the sieve analyzer 11 .

[0033] Specifically, it can be used in conjunction with the sieve body 1 to facilitate fixing the sieve body 1 on the sieve analyzer 11.

[0034] In this embodiment, a sealing gasket is provided between the end cover 2 and the sieve body 1 .

[0035] Specifically, it plays a sealing role and is not easy to cause overflow.

[0036] Working principle: When in use, by fitting the fitting block 10 into the fitting groove 12 on the sieving instrument 11, the sieve body 1 can be quickly fixed on the sieving instrument 11, thereby improving the convenience when disassembling and assembling the sieve body 1, and the operation is simple, and the production difficulty is low, the structure is simple, and the practicability is strong, and it is worthy of promotion. Secondly, by setting the rotating first dredging brush 6 and the second dredging brush 8, the sieve body 1 can be dredged during use, reducing the risk of blockage of the sieve body 1, and ensuring the screening effect and efficiency. It is highly practical and worthy of promotion.

[0037] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A cement standard negative pressure screen, comprising a screen body (1), characterized in that: The upper end of the sieve body (1) is threadedly connected to an end cover (2), and a driving motor (3) is fixedly installed on the top surface of the end cover (2). The output end of the driving motor (3) extends to the interior of the sieve body (1) and is installed with a rotating rod (4), and the outer wall of the rotating rod (4) is fixedly connected to a first connecting rod (5) and a second connecting rod (7). The first connecting rod (5) and the second connecting rod (7) are respectively installed with a first dredging brush (6) and a second dredging brush (8) at one end away from the rotating rod (4). The first dredging brush (6) and the second dredging brush (8) are both in contact with the surface of the sieve body (1). The sieve body (1) is arranged on a sieve analyzer (11). A fitting block (10) is fixedly connected to the surface of the sieve body (1). A fitting groove (12) is provided on the surface of the sieve analyzer (11) at a position corresponding to the fitting block (10), and the fitting groove (12) and the fitting block (10) are used in conjunction with each other.

2. A cement standard negative pressure screen according to claim 1, characterized in that: A sealing ring (9) is installed on the sieve body (1), and the diameter of the sealing ring (9) is smaller than the diameter of the sieve body (1).

3. A cement standard negative pressure screen according to claim 1, characterized in that: The driving motor (3) is electrically connected to an external power source via a wire.

4. A cement standard negative pressure screen according to claim 1, characterized in that: There are a plurality of fitting blocks (10), and the fitting blocks (10) are distributed in a circular array on the upper end of the outer wall of the sieve body (1).

5. A cement standard negative pressure screen according to claim 1, characterized in that: There are a plurality of the fitting grooves (12), and the plurality of fitting grooves (12) are distributed in a circular array on the surface of the sieve analyzer (11).

6. A cement standard negative pressure screen according to claim 1, characterized in that: A sealing gasket is provided between the end cover (2) and the sieve body (1).

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