Negative pressure screen analysis instrument

Abstract

The utility model relates to the field of new material detection, in particular to a negative pressure screen analysis instrument. The utility model relates to a negative pressure screen analysis instrument which comprises a rack, the tray structure is arranged at the upper part of the rack, extends upwards and is provided with an upward opening; the test sieve is arranged at the upper opening of the tray structure, and a negative pressure cavity is formed between the bottom of the test sieve and the tray structure; the air inlet and the air outlet are respectively formed in different positions of the tray structure. In the negative pressure screen analysis instrument, the air inlet and the air outlet are respectively arranged at different positions of the tray structure. Due to the fact that air enters the negative pressure cavity from the specially-arranged air inlet instead of random air inlet, the negative pressure state is stable.

Description

Technical Field

[0001] The utility model relates to the field of new material detection, and particularly to a negative pressure sieve analyzer. Background Art

[0002] A negative pressure sieve analyzer is an instrument used to test the fineness of portland cement, ordinary portland cement, slag portland cement, fly ash portland cement, and composite portland cement. The negative pressure sieve analyzer mainly consists of an analytical sieve, a dust collector, a cyclone, and a box body, etc. The bottom end of the analytical sieve is connected to the upper end of the cyclone. A dust collection bottle is connected to the lower end of the cyclone. The top opening of the cyclone is connected to the dust collector through a hose. The dust collector is located in the box body below the negative pressure sieve analyzer, and the filtered air is discharged through the exhaust port at its upper end. During operation, the entire system maintains a negative pressure state. The fine powder material to be tested in the sieve mesh is in a fluidized state under the action of the airflow ejected by the rotating air nozzle and moves along with the airflow. Among them, the fine particles with a particle size smaller than the sieve mesh aperture are driven by the airflow to pass through the sieve mesh and are sucked away, while the coarse particles with a particle size larger than the sieve mesh aperture remain in the sieve mesh, thus achieving the purpose of screening.

[0003] However, during the implementation of the present utility model, the applicant found that the stability of the negative pressure state inside the traditional negative pressure sieve analyzer is poor, which brings inconvenience to the tests and detections. Content of the Utility Model

[0004] I. Technical Problems to be Solved

[0005] The present utility model expects to at least partially solve one of the above technical problems.

[0006] II. Technical Solutions

[0007] The present utility model provides a negative pressure sieve analyzer. The negative pressure sieve analyzer includes: a frame; a tray structure disposed at the upper part of the frame, extending upward and having an upward opening; a test sieve disposed at the upper opening of the tray structure, and a negative pressure chamber is formed between the bottom of the test sieve and the tray structure; an air inlet and an air outlet, respectively disposed at different positions of the tray structure.

[0008] In some embodiments of the present utility model, it further includes: an air inlet pipeline, the upstream side of which is connected to the atmosphere, the downstream side of which is connected to the air inlet, and a pressure regulating valve is disposed in the middle thereof.

[0009] In some embodiments of the present utility model, it further includes: an air outlet pipeline, the upstream side of which is connected to the air outlet, and the downstream side of which is connected to a negative pressure source.

[0010] In some embodiments of the present utility model, the pressure regulating valve is an electrically controlled valve, and the negative pressure sieve analyzer further includes: a negative pressure sensor, whose sensing side extends into the negative pressure chamber or the air outlet pipeline; a program controller, whose negative pressure signal input end is connected to the output end of the negative pressure sensor, and whose negative pressure control end is connected to the control end of the electrically controlled valve.

[0011] In some embodiments of the present utility model, it further includes: a jet nozzle, which is arranged at the center of the tray structure and faces the bottom of the test sieve; wherein, the air inlet and the air outlet are respectively arranged on both sides of the jet nozzle.

[0012] In some embodiments of the present utility model, the test sieve includes: a sieve mesh; a sieve frame, which is formed on the outside of the sieve mesh; wherein, both the sieve mesh and the sieve frame are prepared from a metal material or a non-metal material with a metal material plated on the outside.

[0013] In some embodiments of the present utility model, the sieve frame is made of copper, stainless steel or chrome-plated plastic.

[0014] In some embodiments of the present utility model, the sieve mesh is made of stainless steel.

[0015] In some embodiments of the present utility model, the sieve frame is made of brass.

[0016] In some embodiments of the present utility model, an electrostatic grounding wire is arranged on the outside of the sieve frame or the sieve mesh.

[0017] In some embodiments of the present utility model, the test sieve further includes: a sieve cover, which is covered on the upper part of the sieve mesh; wherein, the sieve cover is prepared from an anti-static resin material.

[0018] In some embodiments of the present utility model, it further includes: an ultrasonic generator, whose ultrasonic output end abuts against the outside of the test sieve.

[0019] III. Beneficial Effects

[0020] As can be seen from the above technical solutions, the present utility model has at least one of the following beneficial effects compared with the prior art:

[0021] 1. The air inlet and the air outlet are respectively arranged at different positions of the tray structure. Since the negative pressure chamber intakes air from the specially arranged air inlet instead of random intake, the negative pressure state is stabilized. Preferably, the air inlet and the air outlet are symmetrically arranged on both sides of the jet nozzle, so that the stability of the negative pressure state is the best.

[0022] 2. The negative pressure sensor and the program controller are added. During actual use, the target negative pressure of the negative pressure chamber is set through the program controller, the negative pressure sensor senses the negative pressure in the negative pressure chamber in real time, and the program controller adjusts the opening degree of the pressure regulating valve according to the built-in algorithm, thereby realizing the stability and automatic adjustment of the negative pressure state in the negative pressure chamber.

[0023] 3. The sieve mesh, sieve frame, and sieve cover are all made of anti-static materials, which can conduct the static electricity generated during the sieving process as much as possible, avoid the agglomeration of sieved materials due to static electricity, and improve the sieving efficiency. After testing, the sieve mesh is made of stainless steel and the sieve frame is made of brass, with the best anti-static effect.

[0024] 4. Ultrasonic-assisted vibration is added. Through the ultrasonic vibration of the ultrasonic generator, the sieving time can be shortened, the sieving efficiency can be improved, and the fineness of the powder can be truly reflected. Description of the Drawings

[0025] Figure 1 It is a schematic structural diagram of the negative pressure sieving instrument according to the embodiment of the present invention. Detailed Embodiments

[0026] The present invention provides a new type of negative pressure sieving instrument with stable working state, capable of preventing static electricity and improving work efficiency.

[0027] To make the purpose, technical solution and advantages of the present invention clearer and more understandable, the following further details the present invention in combination with specific embodiments and with reference to the drawings.

[0028] In an exemplary embodiment of the present invention, a negative pressure sieving instrument is provided. Figure 1 It is a schematic structural diagram of the negative pressure sieving instrument according to the embodiment of the present invention.

[0029] As Figure 1 shown, the negative pressure sieving instrument of this embodiment includes: a frame 10; a tray structure 20, arranged at the upper part of the frame, extending upward and having an upward opening; a test sieve 30, arranged at the upper opening of the tray structure, forming a negative pressure chamber A between the bottom of the test sieve and the tray structure; a jet nozzle 40, arranged at the central position of the tray structure and facing the bottom of the test sieve; an air inlet 21 and an air outlet 24, respectively arranged at different positions of the tray structure.

[0030] The following details each part of the negative pressure sieving instrument of this embodiment respectively.

[0031] In the process of implementing the present invention, the applicant found that the stability of the negative pressure chamber in the prior art is relatively poor, fluctuating up and down, which brings inconvenience to the instrument control. Accordingly, the applicant improved the negative pressure sieving instrument.

[0032] As Figure 1As shown in the figure, in this embodiment, an air inlet 21 and an air outlet 24 are respectively arranged on both sides of the tray structure. Since the negative pressure chamber A intakes air from the specially arranged air inlet 21 instead of random intake, the negative pressure state is stabilized. Preferably, the air inlet 21 and the air outlet 24 are symmetrically arranged on both sides of the jet nozzle 40, so that the stability of the negative pressure state is optimal.

[0033] To further enhance the stability of the negative pressure state, the negative pressure sieve analyzer in this embodiment further includes: an air inlet pipeline 22, whose upstream side is connected to the atmosphere, whose downstream side is connected to the air inlet, and a pressure regulating valve 23 is arranged in the middle thereof, and the pressure regulating valve is an electric control valve; an air outlet pipeline 25, whose upstream side is connected to the air outlet, whose downstream side is connected to the negative pressure source; a negative pressure sensor 26, whose sensing side extends into the negative pressure chamber or the air outlet pipeline; a program controller 27, whose negative pressure signal input end is connected to the output end of the negative pressure sensor, and whose negative pressure control end is connected to the control end of the electric control valve.

[0034] During actual use, the program controller 27 sets the target negative pressure of the negative pressure chamber A, the negative pressure sensor 26 real-time senses the negative pressure in the negative pressure chamber, and the program controller 27 adjusts the opening degree of the pressure regulating valve 23 according to the built-in algorithm, thereby realizing the stability and automatic adjustment of the negative pressure state in the negative pressure chamber A.

[0035] In addition, the applicant also found that for the negative pressure sieve analyzer in the traditional technology, it is very difficult to sieve powders that are prone to agglomeration or have strong static electricity, resulting in the fineness detection deviating from the actual particle size distribution. Accordingly, the applicant has improved the negative pressure sieve analyzer.

[0036] As Figure 1 shown, the test sieve 30 includes: a sieve mesh 31; a sieve frame 32 formed on the outside of the sieve mesh; and a sieve cover 33 covering the upper part of the sieve mesh. To improve the antistatic performance of the test sieve, both the sieve mesh and the sieve frame are made of metal materials or non-metal materials with a metal material coating on the outside.

[0037] In this embodiment, the sieve mesh 31 is made of stainless steel; the sieve frame 32 is made of brass; the sieve cover is made of antistatic resin material, but the present invention is not limited thereto. In other embodiments of the present invention, the sieve frame can also be made of plastic / resin materials with chromium plating, stainless steel, bronze, red copper and other materials, as long as it can conduct static electricity.

[0038] In this embodiment, an electrostatic grounding wire is arranged on the outside of the sieve frame 32. The electrostatic grounding wire is connected to the body shell or other ground potential to conduct the static electricity generated during the sieving process.

[0039] Through the above settings, the static electricity generated during the sieving process can be conducted as much as possible, avoiding the agglomeration of the sieving material due to static electricity, and improving the sieving efficiency.

[0040] In addition, the applicant found that in the traditional technology, manual screening was adopted, and the detection time for each sample was too long, about 1 hour to 2 hours, with extremely poor timeliness and unable to guide production operations in a timely manner. Therefore, the applicant improved the negative pressure sieve analyzer.

[0041] As Figure 1 shown, the negative pressure sieve analyzer of this embodiment further includes: an ultrasonic generator 50, whose ultrasonic output end abuts against the outer side of the test sieve. The control end of the ultrasonic generator 50 is connected to the program controller 27. The program controller can set the ultrasonic frequency and ultrasonic intensity. Through the ultrasonic vibration of the ultrasonic generator, the screening time can be shortened, the screening efficiency can be improved, and the fineness of the powder can be truly reflected.

[0042] In this embodiment, the program controller 27 is used to adjust the pressure of the negative pressure source, the opening degree of the pressure regulating valve, the frequency and intensity of the ultrasonic generator, and the screening time. The operator can set it according to needs.

[0043] So far, the embodiments of the present utility model have been introduced. Based on the above description, those skilled in the art should have a clear understanding of the present utility model.

[0044] It should also be noted that the directional terms mentioned in the embodiments, such as "center", "horizontal", "longitudinal", "top", "bottom", "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship only based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present utility model. And throughout the drawings, the same elements are represented by the same or similar reference numerals. And the shapes and sizes of the components in the drawings do not reflect the actual sizes and proportions, but only illustrate the content of the embodiments of the present utility model.

[0045] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "connection" 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 directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific situations.

[0046] Those skilled in the art should understand that in the claims and the description of the present utility model, the word "comprising" does not exclude the existence of elements (or steps) not listed in the claims. The word "a" or "an" before an element (or step) does not exclude the existence of multiple such elements (or steps).

[0047] For some implementations, if they are not the key content of the present utility model and are well-known to those of ordinary skill in the art, due to space limitations, they are not described in detail in the accompanying drawings of the specification or in the text. In this case, reference may be made to relevant traditional technologies for understanding.

[0048] Moreover, the purpose of providing the above embodiments is only to enable the present utility model to meet legal requirements, and the present utility model can be implemented in many different forms and should not be construed as limited to the embodiments set forth herein.

[0049] Similarly, it should be understood that, in order to streamline the present utility model, in the above description of the exemplary embodiments of the present utility model, various features of the present utility model are sometimes grouped together into a single embodiment, figure, or description thereof. However, the method of the present utility model should not be construed as reflecting the intention that the claimed utility model requires more features than those expressly recited in each claim. Rather, as reflected in the claims, each aspect of the utility model lies in less than all the features of the preceding single embodiment. Also, the embodiments may be combined with each other or with other embodiments based on design and reliability considerations, that is, the technical features in different embodiments can be freely combined to form more embodiments. Therefore, the claims following the specific implementation are hereby expressly incorporated into the specific implementation, where each claim itself serves as a separate embodiment of the present utility model.

[0050] In the above specific embodiments, the purpose, technical means, and beneficial effects of the present utility model have been described in detail. It should be understood that the purpose of the detailed description is for those skilled in the art to better understand the present utility model and is not used to limit the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A negative pressure sieve analyzer, characterized in that: include: frame; A tray structure is arranged on the upper part of the frame, extends upward and has an upward opening; A test sieve is arranged at the upper opening of the tray structure, and a negative pressure chamber is formed between the bottom of the test sieve and the tray structure; The air inlet and the air outlet are respectively arranged at different positions of the tray structure.

2. The negative pressure sieve analyzer according to claim 1, characterized in that: Also includes: An air intake pipeline, the upstream side of which is connected to the atmosphere, the downstream side of which is connected to the air intake port, and a pressure regulating valve is provided in the middle thereof; And / or, an air outlet pipeline, an upstream side of which is connected to the air outlet, and a downstream side of which is connected to a negative pressure source.

3. The negative pressure sieve analyzer according to claim 2, characterized in that: The pressure regulating valve is an electrically controlled valve, and the negative pressure sieve analyzer further comprises: A negative pressure sensor, the sensing side of which extends into the negative pressure chamber or the air outlet pipeline; A program controller has a negative pressure signal input end connected to the output end of the negative pressure sensor, and a negative pressure control end connected to the control end of the electric control valve.

4. The negative pressure sieve analyzer according to claim 1, characterized in that: Also includes: an air jet nozzle, disposed in the center of the tray structure and facing the bottom of the test sieve; Wherein, the air inlet and the air outlet are respectively arranged on both sides of the air nozzle.

5. The negative pressure sieve analyzer according to any one of claims 1 to 4, characterized in that: The test sieve comprises: Screen; A screen frame formed on the outside of the screen; Wherein, the screen mesh and the screen frame are both made of metal material or non-metal material with metal material plated on the outside.

6. The negative pressure sieve analyzer according to claim 5, characterized in that: The screen frame is made of copper, stainless steel or chrome-plated plastic.

7. The negative pressure sieve analyzer according to claim 6, characterized in that: The screen is made of stainless steel; And / or, the sieve frame is made of brass.

8. The negative pressure sieve analyzer according to claim 6, characterized in that: An electrostatic grounding wire is arranged on the outer side of the screen frame or the screen mesh.

9. The negative pressure sieve analyzer according to claim 5, characterized in that: The test sieve also includes: A screen cover, which is arranged on the upper part of the screen; Wherein, the sieve cover is made of antistatic resin material.

10. The negative pressure sieve analyzer according to any one of claims 1 to 4, characterized in that: Also includes: The ultrasonic generator has an ultrasonic output end abutting against the outer side of the test sieve.

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