Automatic negative pressure screen analysis instrument

Abstract

The utility model discloses an automatic negative pressure screen analysis instrument which comprises a screen base, a lifting platform and an air nozzle, when the instrument is used, a bracket hoops a screen, materials to be detected are filled in the screen, the screen is placed in a placing groove of the screen base, and the air nozzle sprays air to enable the materials in the screen to be in a flowing state. The connector is in butt joint with an external negative pressure source to pump away fine particles with the particle size smaller than that of screen meshes, after screening is completed, the lifting platform moves downwards to enable the bracket to make contact with the weighing mechanism, the lifting platform continues to move downwards to enable the screen base to be separated from the screen, and the weighing mechanism weighs the screen and the bracket. The weight of the residual material in the sieve is obtained by subtracting the weight of the sieve and the bracket, the weighing is more accurate, and the efficiency is higher.

Description

Technical Field

[0001] This utility model relates to the field of detection device technology, specifically to an automatic negative pressure screening analyzer. Background Technology

[0002] In the construction industry, cement generally needs to undergo fineness testing. For example, the GBT1345-2005 Cement Fineness Testing Method, implemented on August 1, 2005, specifies the specific testing details, including weighing testing. During the test, a sieve containing material is placed at the sieve base, and the corresponding material is extracted from the sieve by negative pressure suction. Then, the remaining material in the sieve is carefully transferred to another carrier, and the carrier is weighed. During the material transfer process, losses are inevitable, resulting in defects such as low measurement accuracy and slow measurement efficiency, which need to be improved. Utility Model Content

[0003] To address at least one of the aforementioned technical deficiencies, this utility model provides the following technical solution:

[0004] This application discloses an automatic negative pressure sieve analyzer, including a sieve base, a lifting platform, and an air nozzle. The sieve base is provided at the moving end of the lifting platform. The top surface of the sieve base is provided with a placement groove for placing the sieve, and the air nozzle is provided in the placement groove. The groove wall is provided with an interface for suction that communicates with the outside. It also includes a bracket for supporting the sieve and a weighing mechanism. The weighing mechanism is provided on both sides of the sieve base. The weighing mechanism is located on the path of the bracket as it moves down with the lifting platform to weigh the sieve.

[0005] During use, the bracket holds the sieve, and the material to be tested is placed inside the sieve. The sieve is then placed in the mounting slot of the sieve base. Gas is sprayed from the nozzle to make the material inside the sieve flow. The interface is connected to an external negative pressure source to remove fine particles smaller than the sieve mesh. After screening, the lifting platform moves down to make the bracket contact the weighing mechanism. The lifting platform continues to move down to separate the sieve base from the sieve. The weighing mechanism weighs the sieve and the bracket. Subtracting the weight of the sieve and the bracket gives the weight of the remaining material inside the sieve. This method is more accurate and efficient.

[0006] Furthermore, the weighing mechanism is a load cell type, which has the advantages of accurate weighing and easy installation.

[0007] Furthermore, the weighing mechanism includes a mounting base and a weighing sensor. The weighing sensor is installed at the mounting base, and the additional mounting base facilitates the connection of the weighing sensor.

[0008] For brackets, such as the common frame or trough shape, the sieve can be placed in the frame opening or trough cavity. Of course, brackets can also be composed of multiple parts, such as two plates fixed on both sides of the sieve. These two plates form a bracket. The specific configuration of the bracket can be freely selected according to the needs.

[0009] Furthermore, it also includes a sieve, with brackets on both sides of the sieve. The specific configuration of the brackets can be a common flat plate or an L-shaped configuration, depending on the requirements.

[0010] Furthermore, the interface is equipped with a measuring port for measuring negative pressure, which facilitates the measurement of the suction pressure.

[0011] Furthermore, the air outlet of the jet nozzle is positioned upwards to better agitate the material inside the sieve.

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

[0013] 1. This utility model improves the structure of the negative pressure sieve analysis instrument. After the material in the sieve is sieved, it is weighed directly by a weighing mechanism to obtain the weight of the remaining material in the sieve, which helps to improve detection efficiency and accuracy. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the automatic negative pressure sieve analyzer in Example 1;

[0016] Figure 2 This is a schematic diagram of the automatic negative pressure sieve analyzer in Example 1;

[0017] The attached figures are labeled as follows:

[0018] 1. Lifting platform; 2. Sieves base; 3. Air nozzle; 4. Bracket; 5. Weighing mechanism; 6. Interface; 7. Measuring port; 8. Sieves; 51. Weighing sensor; 52. Mounting seat. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0020] Example 1

[0021] like Figure 1 , Figure 2As shown, this example of an automatic negative pressure sieve analyzer includes a sieve base 2, a lifting platform 1, and an air nozzle 3. The sieve base 2 is installed at the moving end of the lifting platform 1. The lifting platform can be of common types such as cylinder telescopic type, screw displacement type, or gear and rack displacement type. The sieve base 2 is connected to the seat body at the top of the lifting platform 1, and the sieve base is moved up and down by the lifting platform. The top surface of the seat body of the sieve base 2 is formed with a placement groove for placing the sieve. An air nozzle 3 is installed on the bottom wall of the placement groove, with the air outlet of the air nozzle 3 facing upward. The wall of the placement groove, such as the bottom wall, is formed with an interface 6 that communicates with the outside. The other end of the interface 6 is connected to other suction mechanisms (such as air pumps), and the suction creates a negative pressure in the placement groove, thereby causing the material in the sieve to be extracted from the interface.

[0022] In this example, a bracket 4 for supporting the sieve 8 and a weighing mechanism 5 are added, such as... Figure 1 , Figure 2 As shown, weighing mechanisms 5 are installed on the left and right sides of the sieve base 2. The weighing mechanisms can be selected from the market according to the needs of the mechanism or device for measuring weight. In this example, the weighing sensor type is used as an example, which includes a mounting base 52 and a weighing sensor 51. The body of the weighing sensor 51 is installed in the cavity of the mounting base 52, and the measuring end of the weighing sensor extends from the top surface of the mounting base.

[0023] The position of the weighing mechanism is defined, such as the weighing mechanism 5 being positioned on the path of the support 4 as the lifting platform 1 moves downwards to measure weight. During use, if the material to be tested is placed in the sieve, the sieve is aligned with the support, and then the sieve is aligned with the groove on the sieve base. Air is blown through the nozzle to keep the material in the sieve flowing. Suction is applied through the interface to extract the corresponding material from the sieve. The lifting platform moves downwards so that the support contacts the measuring end of the weighing mechanism. The lifting platform continues to move downwards to detach from the sieve. Figure 2 As shown, at this time, the total weight of the bracket, sieve and the material in the cavity is measured by the weighing mechanism. After deducting the weight of the sieve and bracket, the weight of the material in the sieve is obtained, which has better detection efficiency and higher detection accuracy.

[0024] The bracket can take many forms, such as the common frame or trough shape, where the sieve is placed in the frame opening or trough cavity. Of course, brackets can also be composed of multiple parts, such as... Figure 1 , Figure 2 The two plates are fixed on the left and right sides of the sieve respectively, and these two plates form the bracket 4. The configuration of the bracket can be freely selected according to the needs.

[0025] A measuring port 7 for measuring negative pressure can also be formed at the port that protrudes from the base of the sieve 8, such as by using a corresponding sensor to detect the suction pressure at the measuring port.

[0026] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are within its protection scope. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within its protection scope.

Claims

1. An automatic negative pressure sieve analyzer, comprising a sieve base (2), a lifting platform (1), and an air nozzle (3), wherein the sieve base (2) is disposed at the movable end of the lifting platform (1), a placement groove for inserting a sieve is disposed on the top surface of the sieve base (2), and an air nozzle (3) is disposed in the placement groove, and an interface (6) for suction communication with the outside is disposed on the wall of the placement groove, characterized in that, It also includes a bracket (4) for supporting the sieve and a weighing mechanism (5). The weighing mechanism (5) is provided on both sides of the sieve base (2). The weighing mechanism (5) is located on the path of the bracket (4) as it moves down with the lifting platform to weigh the weight.

2. The automatic negative pressure sieve analyzer as described in claim 1, characterized in that: The weighing mechanism (5) is a weighing sensor type.

3. The automatic negative pressure sieve analyzer as described in claim 2, characterized in that: The weighing mechanism (5) includes a mounting base (52) and a weighing sensor (51), with the weighing sensor (51) installed at the mounting base (52).

4. The automatic negative pressure sieve analyzer as described in claim 1, characterized in that: It also includes a sieve (8), on both sides of which brackets (4) are provided.

5. An automatic negative pressure sieve analyzer as described in claim 1, characterized in that: The interface (6) is provided with a measuring port (7) for measuring negative pressure.

6. An automatic negative pressure sieve analyzer as described in claim 1, characterized in that: The air outlet of the jet nozzle (3) is set upward.

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