Cement fineness negative pressure screen analysis instrument for wallboard production

Abstract

The utility model relates to the technical field of negative-pressure screen analysis instruments, and discloses a cement fineness negative-pressure screen analysis instrument for wallboard production, which comprises a box shell, a screen seat is arranged at the upper end of the box shell, a driving motor is fixedly mounted in an opening at the upper end of the box shell, and a cam is mounted at the driving end of the driving motor. A barrel type dust collector is arranged in the box body shell, the screen seat comprises a second connecting flange, a connecting ring is fixedly installed in the second connecting flange, a circle of threaded groove is formed in the inner wall of the connecting ring, a filter disc is rotatably installed on the inner wall of the connecting ring, and a limiting ball is fixedly installed on the outer wall of the filter disc; the driving motor drives the cam to push the filter disc to rotate and ascend along the threaded groove, slight vibration is generated at the same time, cement particles are evenly distributed on the screen surface, the particles can be dispersed to prevent the screen from being blocked, and through the synergistic effect of negative pressure screening and mechanical linkage, the screening uniformity and the screening efficiency are improved.

Description

Technical Field

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

[0002] In cement production and quality control, cement fineness is a key indicator, directly affecting cement performance and construction safety. Traditional manual or simple screening methods are greatly affected by human factors, resulting in low precision and efficiency, making it difficult to meet the industry's needs for large-scale, high-quality development. At the same time, as cement industry standards increase the requirements for testing precision and standardization, specialized screening equipment is needed to reduce human error and ensure test accuracy. Early screening instruments had drawbacks such as cement accumulation, screen clogging, and poor sealing that polluted the environment. Driven by demand and technological iteration and optimization, a negative pressure cement fineness screening instrument that utilizes airflow as power for precise screening and is compatible with standards has been gradually developed. Through continuous improvements in structural design and sealing performance, it meets the environmentally friendly, efficient, and accurate demands of modern production testing.

[0003] For example, Chinese patent CN222913419U discloses a cement fineness negative pressure sieve analyzer with a noise reduction mechanism. The nozzle is rotatably connected to the limiting pipe and the limiting frame through a limiting bearing. The lower end of the nozzle is rotatably connected to the air inlet pipe through a rotary joint. The air inlet pipe is fixedly connected to the air outlet of the air pump. When the air pump is started to extract the air from inside the negative pressure sieve, the air is delivered to the inside of the nozzle through the air inlet pipe, so that the airflow ejected from the nozzle can have a greater initial velocity. At the same time, the drive motor can drive the nozzle to rotate through the connecting ring and the transmission belt. When the nozzle rotates, it can increase the coverage area of ​​the airflow to improve the fluidization effect of the cement, so that the cement can pass through the negative pressure sieve quickly under the drive of the airflow, thereby improving the sieving efficiency of the cement.

[0004] Regarding the above and existing related technologies, the inventors believe that the following defects often exist: if the distribution of cement particles on the negative pressure screen is not uniform, rotating the nozzle may cause local airflow to be too strong or too weak, affecting the uniformity of screening. When the cement moisture content is high or the particles are agglomerated, simply relying on rotating airflow may not be able to effectively disperse the particles, leading to screen blockage and reduced screening efficiency. Utility Model Content

[0005] The technical problem to be solved by this utility model is that the existing technology has the disadvantage of uneven distribution of cement particles on the negative pressure screen and easy clogging of the screen. To this end, we propose a cement fineness negative pressure screen analyzer for wall panel production.

[0006] To achieve the above objectives, this application adopts the following technical solution: a negative pressure sieve analyzer for cement fineness in wall panel production, comprising a sieve analyzer, the sieve analyzer including a housing shell, a cyclone dust collector installed on the outside of the housing shell, a sieve seat installed at the upper end of the housing shell, and a digital display time controller installed on one side of the housing shell. When it is necessary to sieve the fineness of cement, the cement is poured into the sieve seat, and the working time is controlled by the digital display time controller so that the instrument can automatically stop after a preset time, which facilitates operation and control of the sieve analysis process.

[0007] Preferably, a protective door is installed on the rear hinge of the outer shell, and a heat dissipation groove is opened on the back of the outer shell. The cyclone vacuum cleaner is fixedly connected to the outer shell of the outer shell by a fixing strip.

[0008] Preferably, a drive motor is fixedly installed inside the upper opening of the housing shell, and a cam is installed on the drive end of the drive motor. The cam fits against the screen base, and a connecting flange is fixedly installed on the upper surface of the housing shell. The screen base and the connecting flange are fixedly connected by bolts.

[0009] Preferably, the cyclone vacuum cleaner includes a cyclone tube, and a dust collection bin is threaded onto the lower end of the cyclone tube.

[0010] Preferably, a canister vacuum cleaner is installed inside the outer shell of the housing, and the suction end of the canister vacuum cleaner is connected to the upper end of the cyclone tube through a connecting pipe.

[0011] Preferably, a connecting pipe 2 is provided through the outer side of the cyclone, a connecting shaft is fixedly installed at one end of the connecting pipe 2, multiple sets of elastic elements are fixedly installed inside the connecting shaft, and a nozzle pipe is slidably installed inside the connecting shaft, with the nozzle pipe located directly below the screen seat.

[0012] Preferably, the screen base includes a second connecting flange, which is fixedly connected to the first connecting flange by bolts. A connecting ring is fixedly installed inside the second connecting flange, and a threaded groove is formed on the inner wall of the connecting ring. A filter disc is rotatably installed on the inner wall of the connecting ring, and a limit ball is fixedly installed on the outer wall of the filter disc. The limit ball matches the threaded groove. A conical shell is fixedly installed at the lower end of the connecting ring, and the lower end of the conical shell is rotatably connected to the nozzle pipe. A protective cover is magnetically installed at the upper end of the connecting ring. When screening cement, this device uses airflow as the power medium for screening. The air inside the cyclone vacuum cleaner is extracted by a barrel vacuum cleaner. During operation, the entire system maintains a negative pressure state. The cement inside the filter disc is extracted through the second connecting pipe, and fine particles with a particle size smaller than the screen holes are carried away by the airflow. The particles pass through the filter disc, enter the cyclone separator with the airflow, and fall into the dust collection bin for collection. Coarse particles larger than the sieve holes remain on the filter disc, thus achieving separation of coarse and fine particles. During the negative pressure suction process, the drive motor is activated to rotate the cam. The cam moves the filter disc upward along the threaded groove while rotating, and at the same time, the filter disc drives the nozzle pipe to move upward synchronously, keeping the suction distance between the nozzle pipe and the filter disc constant. By causing the filter disc to rotate and generate slight vibration, the cement particles are more evenly distributed on the filter disc, and the airflow generated by the nozzle pipe evenly sucks the cement on the filter disc, improving the uniformity of screening. At the same time, the slight vibration can effectively disperse the particles, preventing large particles from clogging the screen and causing a decrease in screening efficiency.

[0013] The technical effects and advantages of this utility model are as follows:

[0014] In this invention, the drive motor drives the cam to push the filter disc to rotate and rise along the edge of the threaded groove, while simultaneously generating slight vibration. This ensures that cement particles are evenly distributed on the screen surface and disperses the particles to prevent screen blockage. As the filter disc moves, the elastic element drives the nozzle pipe to move upward synchronously, maintaining a constant suction distance to stabilize the negative pressure. Through the synergistic effect of negative pressure screening and mechanical linkage, the screening uniformity and screening efficiency are improved, meeting the precise detection requirements for cement fineness in wall panel production. Attached Figure Description

[0015] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts:

[0016] Figure 1 This is a schematic diagram of the overall structure of the screening analyzer of this utility model. Figure 1 ;

[0017] Figure 2 This is a schematic diagram of the overall structure of the screening analyzer of this utility model. Figure 2 ;

[0018] Figure 3 This is a schematic diagram of the internal structure of the screening analyzer of this utility model;

[0019] Figure 4 This is a schematic diagram of the internal structure of the screening analyzer of this utility model;

[0020] Figure 5 This is a schematic diagram of the internal structure of the cyclone vacuum cleaner of this utility model;

[0021] Figure 6 This is a schematic diagram of the internal structure of the sieve seat of this utility model;

[0022] Figure 7 This is a schematic diagram of the internal structure of the sieve seat of this utility model.

[0023] Legend: 1. Sieve analyzer; 11. Housing shell; 111. Digital display time controller; 112. Protective door; 113. Heat dissipation trough; 114. Fixing strip; 115. Drive motor; 116. Cam; 117. Connecting flange one; 12. Cyclone vacuum cleaner; 121. Cyclone tube; 122. Dust collection bin; 13. Sieve base; 131. Connecting flange two; 132. Bolt; 133. Connecting ring; 1331. Threaded groove; 1332. Conical shell; 133. Connecting ring; 134. Filter disc; 1341. Limiting ball; 135. Protective cover; 14. Canister vacuum cleaner; 141. Connecting pipe one; 15. Connecting pipe two; 151. Connecting shaft; 152. Elastic element; 153. Nozzle pipe. Detailed Implementation

[0024] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0025] Reference Figure 1-2 As shown, this utility model provides a technical solution: a negative pressure sieve analyzer for cement fineness in wall panel production, including a sieve analyzer 1. The sieve analyzer 1 includes a housing 11, a cyclone dust collector 12 is provided on the outside of the housing 11, a sieve seat 13 is provided on the upper end of the housing 11, and a digital display time controller 111 is provided on one side of the housing 11. When it is necessary to sieve the fineness of cement, the cement is poured into the sieve seat 13, and the working time is controlled by the digital display time controller 111, so that the instrument can automatically stop after a preset time, which is convenient for operation and control of the sieve analysis process.

[0026] Reference Figure 1-3As shown in this embodiment: a protective door 112 is installed on the back hinge of the outer shell 11, a heat dissipation groove 113 is provided on the back of the outer shell 11, and the cyclone vacuum cleaner 12 is fixedly connected to the outer shell 11 via a fixing strip 114.

[0027] Reference Figure 3 , Figure 6 As shown in this embodiment: a drive motor 115 is fixedly installed inside the upper opening of the housing 11. A cam 116 is installed on the drive end of the drive motor 115. The cam 116 is in contact with the screen seat 13. A connecting flange 117 is fixedly installed on the upper surface of the housing 11. The screen seat 13 and the connecting flange 117 are fixedly connected by bolts 132.

[0028] Reference Figure 3-4 As shown in this embodiment: the cyclone vacuum cleaner 12 includes a cyclone cylinder 121, and a dust collection bin 122 is threadedly installed at the lower end of the cyclone cylinder 121.

[0029] Reference Figure 3-5 As shown in this embodiment: a canister vacuum cleaner 14 is installed inside the outer shell 11 of the housing, and the suction end of the canister vacuum cleaner 14 is connected to the upper end of the cyclone 121 through a connecting pipe 141.

[0030] Reference Figure 3-6 As shown in this embodiment: a connecting pipe 2 15 is provided through the outer side of the cyclone 121, a connecting shaft 151 is fixedly installed at one end of the connecting pipe 2 15, a number of elastic elements 152 are fixedly installed inside the connecting shaft 151, and a nozzle pipe 153 is slidably installed inside the connecting shaft 151, with the nozzle pipe 153 located directly below the screen seat 13.

[0031] Reference Figure 2-7As shown in this embodiment: the screen base 13 includes a second connecting flange 131, which is fixedly connected to the first connecting flange 117 by bolts 132. A connecting ring 133 is fixedly installed inside the second connecting flange 131. A threaded groove 1331 is formed on the inner wall of the connecting ring 133. A filter disc 134 is rotatably installed on the inner wall of the connecting ring 133. A limiting ball 1341 is fixedly installed on the outer wall of the filter disc 134, and the limiting ball 1341 matches the threaded groove 1331. The lower end of the connecting ring 133 is fixedly fitted with a conical shell 1332, the lower end of which is rotatably connected to the nozzle pipe 153. A protective cover 135 is magnetically attached to the upper end of the connecting ring 133. When screening cement, this device uses airflow as the power medium for screening. The canister vacuum cleaner 14 extracts air from the inside of the cyclone vacuum cleaner 12. During operation, the entire system maintains a negative pressure state. The cement inside the filter disc 134 is extracted through the connecting pipe 15. In this process, fine particles smaller than the sieve holes are carried by the airflow through the filter disc 134, enter the cyclone 121 with the airflow, and fall into the dust collection bin 122 for collection. Coarse particles larger than the sieve holes remain on the filter disc 134, thus achieving the separation of coarse and fine particles. During the negative pressure suction process, the drive motor 115 is activated to drive the cam 116 to rotate. The cam 116 moves the filter disc 134 upward along the threaded groove 1331 while rotating. At the same time, the filter disc 134 drives the nozzle pipe 153 to move upward synchronously, keeping the suction distance between the nozzle pipe 153 and the filter disc 134 constant. By making the filter disc 134 rotate and generate slight vibration, the cement particles are more evenly distributed on the filter disc 134, and the airflow generated by the nozzle pipe 153 evenly sucks the cement on the filter disc 134, improving the uniformity of screening. At the same time, the slight vibration can effectively disperse the particles and prevent large particles from clogging the screen and causing a decrease in screening efficiency.

[0032] Working principle: When the cement fineness negative pressure sieve analyzer for wall panel production is working, the barrel vacuum cleaner 14 draws air from the inside of the cyclone vacuum cleaner 12 to form a negative pressure system. The airflow passes through the connecting pipe 15 and the nozzle pipe 153 upward through the screen holes of the filter plate 134. Fine particles with a particle size smaller than the screen holes are carried into the cyclone 121 and fall into the dust collection bin 122 for collection. Coarse particles are retained on the filter plate 134. At the same time, the drive motor 115 drives the cam 116 to rotate, pushing the filter plate 134 to rise and rotate along the threaded groove 1331 on the inner wall of the connecting ring 133, generating slight vibration. This ensures that the cement particles are evenly distributed and prevents the screen from clogging. When the filter plate 134 moves, the elastic element 152 in the connecting shaft 151 drives the nozzle pipe 153 to move upward synchronously to maintain a constant suction distance, ensure stable negative pressure, and achieve efficient and accurate sieving.

[0033] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A cement fineness negative pressure screen analyzer for wallboard production, characterized by, The device includes a screening instrument, which includes a housing shell, a cyclone vacuum cleaner on the outside of the housing shell, a screen base on the upper end of the housing shell, a drive motor fixedly installed inside the upper opening of the housing shell, and a cam installed on the drive end of the drive motor, the cam being in contact with the screen base. The outer shell of the box is equipped with a canister vacuum cleaner, and the suction end of the canister vacuum cleaner is connected to the upper end of the cyclone vacuum cleaner through a connecting pipe. The screen base includes a second connecting flange, a connecting ring is fixedly installed inside the second connecting flange, a threaded groove is formed on the inner wall of the connecting ring, a filter disc is rotatably installed on the inner wall of the connecting ring, a limit ball is fixedly installed on the outer wall of the filter disc, the limit ball matches the threaded groove, a conical shell is fixedly installed at the lower end of the connecting ring, and a protective cover is magnetically installed at the upper end of the connecting ring.

2. The cement fineness negative pressure sieve analyzer for wallboard production according to claim 1, characterized in that: A digital time controller is provided on one side of the housing.

3. The cement fineness negative pressure screen analyzer for wallboard production according to claim 2, characterized in that: A protective door is installed on the rear hinge of the housing, and a heat dissipation groove is provided on the back of the housing. The cyclone vacuum cleaner is fixedly connected to the housing via a fixing strip.

4. The cement fineness negative pressure sieve analyzer for wallboard production according to claim 1, characterized in that: The cyclone vacuum cleaner includes a cyclone tube, and a dust collection bin is threaded onto the lower end of the cyclone tube.

5. The cement fineness negative pressure screen analyzer for wallboard production according to claim 4, characterized in that: A second connecting pipe is provided through the outer side of the cyclone cylinder. A connecting shaft is fixedly installed at one end of the second connecting pipe. Multiple sets of elastic elements are fixedly installed inside the connecting shaft. A nozzle pipe is slidably installed inside the connecting shaft. The nozzle pipe is located directly below the screen seat.

6. The cement fineness negative pressure sieve analyzer for wall panel production according to claim 5, characterized in that: The lower end of the conical shell is rotatably connected to the nozzle pipe.

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