阅读说明：本技术 高效粉料分选筛 (High-efficiency powder sorting screen ) 是由 李金华 罗仕配 冼伟潮 黄金荣 苏广隆 林庆生 于 2021-08-09 设计创作，主要内容包括：本发明属于陶瓷粉料设备技术领域,具体涉及一种高效粉料分选筛。所述分选筛包括筛板,支架,筛板的筛面上设有筛网,筛板以倾斜的方式安装在支架上。筛板与水平面之间的夹角优选为30度—60度。筛网的背面设有托条,托条的两端与筛板连接,在托条与筛板的连接处设有减震胶垫。托条的下方设有振动装置,当筛网的网孔被粉末状物料阻塞或卡死时,启动振动装置振动托条,由托条带动筛网振动,从而疏通被阻塞或卡死的网孔。本发明有效解决了筛网的网眼被颗粒状物质或粉料卡死或阻塞的问题,显著地提高了粉料分选筛的工作效率,并节省了电能,降低了噪音。(The invention belongs to the technical field of ceramic powder equipment, and particularly relates to a high-efficiency powder sorting screen. The separating screen comprises a screen plate and a support, wherein a screen mesh is arranged on the screen surface of the screen plate, and the screen plate is arranged on the support in an inclined mode. The angle between the screen deck and the horizontal plane is preferably 30-60 degrees. The back of the screen is provided with a support strip, the two ends of the support strip are connected with the screen plate, and a damping rubber pad is arranged at the joint of the support strip and the screen plate. A vibrating device is arranged below the supporting strip, when the meshes of the screen are blocked or blocked by the powdery materials, the vibrating device is started to vibrate the supporting strip, and the supporting strip drives the screen to vibrate, so that the blocked or blocked meshes are dredged. The invention effectively solves the problem that meshes of the screen are blocked or blocked by granular substances or powder, obviously improves the working efficiency of the powder sorting screen, saves electric energy and reduces noise.)

1. The utility model provides a high-efficient powder classifying screen, includes the sieve, and the support is equipped with the screen cloth on the sifter of sieve, its characterized in that: the screen plate is arranged on the bracket in an inclined mode, and the included angle between the screen plate and the horizontal plane is 30-60 degrees.

2. The high efficiency powder classifying screen according to claim 1, wherein: the included angle between the sieve plate and the horizontal plane is 36-42 degrees.

3. The high efficiency powder classifying screen according to claim 1, wherein: the back of the screen is provided with a support strip, two ends of the support strip are connected with the screen plate, and a damping rubber pad is arranged at the joint of the support strip and the screen plate.

4. The high efficiency powder classifying screen according to claim 3, wherein: and a vibrating device is arranged below the supporting strip and can vibrate the supporting strip so as to drive the screen to vibrate.

5. The high efficiency powder classifying screen according to claim 4, wherein: the vibration frequency of the vibration device is 6000 to 25000 times per minute, and the amplitude is 0.2mm to 0.8 mm.

6. The high efficiency powder classifying screen according to claim 5, wherein: the vibration frequency of the vibration device is 23000 times per minute, and the amplitude is 0.7 mm.

7. The high efficiency powder classifying screen according to any one of claims 4 to 6, wherein: the vibration device is a pneumatic vibrator or a hydraulic vibrator.

Technical Field

The invention belongs to the technical field of ceramic powder equipment, and particularly relates to a high-efficiency powder sorting screen.

Background

The powder sorting screen is one of key devices in the ceramic powder production line. The existing powder sorting screen has various specific structures, but the basic structure comprises a screen plate with a screen mesh, a bracket for mounting the screen plate and a motor for driving the screen plate to work. When the ceramic powder screening machine works, ceramic powder to be screened falls onto the screen from the upper part, the motor drives the screen to do reciprocating linear motion on the horizontal plane, small particulate matters meeting requirements in the ceramic powder penetrate through meshes of the screen to enter the lower part of the screen, and then the small particulate matters are conveyed to the powder collecting device through a discharging device (such as a conveying belt). In the process, the granular substances with the grain diameter larger than the meshes in the ceramic powder are left on the screen, and can be poured out or output from a discharge hole at the front end of the screen by turning the screen or shaking the screen back and forth, and then are further processed, so that the separation of the ceramic powder with different grain diameters is realized.

Since the particle size of a part of the granular matters in the ceramic powder is substantially equivalent to the mesh of the screen, the part of the granular matters may block the mesh of the screen during the process of screening the ceramic powder by the powder sorting screen. In addition, the powder material in the ceramic powder has a certain viscosity, especially a strong viscosity under the damp condition, so that part of meshes of the screen of the separating screen are blocked by the powder material in the process of screening the ceramic powder, thereby greatly reducing the working efficiency of the powder separating screen.

In order to solve the problem that the powder material blocks or blocks the meshes, the prior art adopts a technical means of driving the sieve plate to vibrate, and driving the sieve plate to vibrate through the vibration of the sieve plate, so as to dredge the meshes. The technical means can solve the problem of blockage or blockage of the meshes to a certain extent. However, on one hand, since the screen panel vibrates along with the screen plate and even the support, the vibration mode consumes more energy and generates more noise, and on the other hand, since the screen panel vibrates in a horizontal state or a state close to the horizontal state, some particles stuck in the mesh holes are likely to be stuck in other mesh holes in the falling process after being thrown away from the original mesh holes due to vibration, and therefore, the technical effect of dredging the plugged mesh holes is not ideal.

Disclosure of Invention

The purpose of the invention is: the energy consumption and the noise of the powder separating screen are reduced, and simultaneously, the meshes blocked or stuck by the granular or powdery materials are dredged with high efficiency, thereby overcoming the defects of the prior art. The purpose of the invention is realized by the following technical scheme:

the utility model provides a high-efficient powder classifying screen, includes the sieve, and the support is equipped with the screen cloth on the sifter of sieve, and the sieve is installed on the support with the mode of slope, and the contained angle between sieve and the horizontal plane is 30 degrees-60 degrees.

On the basis of the technical scheme, the invention can be added with the following technical means so as to better or more specifically realize the purpose of the invention:

the included angle between the sieve plate and the horizontal plane is 36-42 degrees.

Furthermore, the back of the screen is provided with a support strip, two ends of the support strip are connected with the screen plate, and a damping rubber pad is arranged at the joint of the support strip and the screen plate.

Further, a vibration device is arranged below the supporting strip and can vibrate the supporting strip, so that the screen is driven to vibrate.

Further, the vibration frequency of the vibration device is 6000 to 25000 times per minute, and the amplitude is 0.2mm to 0.8 mm.

Preferably, the vibration device has a vibration frequency of 23000 times per minute and an amplitude of 0.7 mm.

Preferably, the vibration device is a pneumatic vibrator or a hydraulic vibrator.

The invention has the following main beneficial effects:

1. the screen deck is mounted on the frame in an inclined manner and at a relatively large angle (angle of inclination of 30-60 degrees, preferably 36-42 degrees). The structural design greatly reduces the probability that the meshes of the screen are blocked or blocked by granular substances or powder, thereby obviously improving the working efficiency of the powder sorting screen.

2. Under the condition that the meshes of the screen are blocked or blocked by granular substances or powder, the technical means of driving the screen to vibrate by adopting the vibrating device to vibrate the supporting strips instead of the technical means of driving the screen plate and even the bracket to vibrate is adopted.

Drawings

FIG. 1 is a schematic perspective view of one embodiment of the present invention;

fig. 2 is a schematic view (bottom view) of the back side structure of a screen deck and a screen mesh in an embodiment of the invention;

FIG. 3 is a schematic view of a longitudinal cross-sectional partial structure of an embodiment of the present invention;

figure 4 is a schematic view of the relationship between the inclination angle of the screening deck and the screening efficiency.

Detailed Description

In order to facilitate a better understanding of the technical solutions of the present invention for those skilled in the art, an embodiment of the present invention is described below with reference to the accompanying drawings:

as shown in figure 1, the high-efficiency powder sorting screen comprises a screen plate 1 and a support 2, wherein a screen 3 is arranged on the screen surface of the screen plate 1, and the screen plate 1 is arranged on the support 2 in an inclined mode. The angle between the screening deck 1 and the horizontal plane is 30-60 degrees, i.e. the angle of inclination of the screening deck 1 is 30-60 degrees, which means that the angle between the screening deck 3 and the horizontal plane is also 30-60 degrees.

The front end of the sieve plate 1 is provided with a slag discharge port 5; a motor 4 is arranged at one side of the bottom of the rear end of the bracket 2 and is used for driving a conveyor belt (not shown in the figure) below the screen 3, and a powder collecting device 6 communicated with the conveyor belt is also arranged at the bottom of the rear end of the bracket 2.

As shown in fig. 2 and fig. 3, the back of the screen 3 is provided with a support strip 7, two ends of the support strip 7 are connected with the screen plate 1, and a damping rubber pad (not shown in the figure) is arranged at the joint of the support strip 7 and the screen plate 1. A vibration device 8 is arranged below the supporting strip 7. In this embodiment, the vibration device 8 is a high frequency low amplitude vibration device, preferably a pneumatic vibrator or a hydraulic vibrator, having a vibration frequency of 6000 to 25000 times per minute (preferably 23000 times per minute) and an amplitude of 0.2mm to 0.8mm (preferably 0.7 mm). Vibrating device 8 is connected with external power source, and when the mesh of screen cloth was blocked or the card was died by powdered, granular material, start vibrating device 8 vibration and hold in the palm strip 7, drive the vibration of screen cloth 3 by holding in the palm strip 7 to the mediation is blocked or the dead mesh of card. The vibrating device 8 can also participate in the whole working process of the high-efficiency powder sorting screen, namely, under the condition that the meshes are not blocked or blocked, the vibrating device 8 is started to vibrate the supporting strip 7, and the supporting strip 7 drives the screen 3 to vibrate, so that the screen 3 is effectively prevented from being blocked or blocked by powdery and granular materials, and the working efficiency of the whole powder sorting screen is improved.

When the high-efficiency powder sorting screen works, ceramic powder to be screened directly falls onto the screen mesh 3 from the upper part of the screen mesh 1, the ceramic powder with small particle size passes through the mesh holes of the screen mesh 3 and then falls onto the conveying belt below the screen mesh 3, the ceramic powder is conveyed into the powder collecting device 6 by the conveying belt, the ceramic powder with large particle size slides or rolls downwards on the screen surface of the screen mesh 1 under the action of gravity, and finally is discharged from the slag discharge port 5 at the front end of the screen mesh 1 and then is further processed by other equipment, such as granulation equipment or abrasive grain equipment.

Because the included angle between the screen 3 and the horizontal plane is large, the probability that the meshes of the screen 3 are blocked or stuck is greatly reduced in the process of screening the ceramic powder by the high-efficiency powder screening sieve, and even if the meshes are blocked or stuck by the ceramic powder or particles, the meshes can be dredged by the vibration of the screen 3, so that the efficiency of screening the ceramic powder is obviously improved, and the normal work of the screening sieve is ensured.

The structural features and the working method of an embodiment of the high-efficiency powder sorting screen of the invention are described above with reference to the accompanying drawings, and the relationship between the inclination angle of the screen plate and the screening efficiency is further described below with reference to the accompanying drawings.

Figure 4 is a graphical representation of the relationship between screen deck inclination and screening efficiency fitted from data obtained from multiple experiments. As shown in FIG. 4, when the inclination angle of the sieve plate is less than 30 degrees, the sieving efficiency of the powder sieving sieve is improved along with the increase of the inclination angle of the sieve plate, but the improvement of the sieving efficiency is not obvious. When the inclination angle of the sieve plate reaches 30 degrees (containing 30 degrees), the sieving efficiency of the powder sieving sieve is obviously improved. From the results of multiple experiments, the inclination angle of the sieve plate corresponding to the peak value of the sieving efficiency is between 36 degrees and 42 degrees (the viscosity of the powder is different, the particle size is different, and the inclination angle of the sieve plate corresponding to the peak value of the sieving efficiency is different, but not more than 42 degrees and not less than 36 degrees). When the inclination angle of the sieve plate exceeds the angle corresponding to the peak value of the screening efficiency, the screening efficiency of the powder screening sieve is gradually reduced because the qualified powder does not pass through the meshes (the reason is that the width of the meshes in the horizontal direction is gradually reduced and the forward rolling speed of the qualified powder on the inclined plane of the sieve plate is gradually increased) along with the continuous increase of the inclination angle of the sieve plate, but before the inclination angle of the sieve plate does not exceed 60 degrees, the screening efficiency of the powder screening sieve is still higher than that of the situation that the sieve plate is horizontally arranged. When the inclination angle of the sieve plate exceeds 60 degrees, the sieving efficiency of the powder sieving sieve is obviously reduced.