Zinc oxide piezoresistor powder screening device

Abstract

The utility model relates to the technical field of resistor disc production, in particular to a zinc oxide piezoresistor powder screening device which comprises a support, a bottom plate, a treatment bin, a particle discharging barrel, a screening conical net, a material guiding cover and a driving assembly. An annular powder discharging opening is formed in the peripheral side of the bottom plate, a powder collecting box is further placed below the bottom plate, a particle collecting box is further placed below the particle discharging opening and is placed in the powder collecting box, the top of the particle discharging barrel is fixed, the bottom of the particle discharging barrel right faces the particle discharging opening, and the material guiding cover is installed on the bottom plate. A mounting cavity is formed between the material guide cover and the bottom plate, and the driving assembly is mounted in the mounting cavity. The screening device is simple in overall structure, stable in operation and very convenient to control, particles obtained after screening can be automatically collected into the particle collecting box without being cleaned, and cleaning work is reduced.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of resistance sheet production, in particular to a zinc oxide voltage-dependent resistor powder screening device. BACKGROUND

[0002] As a sensitive component, the zinc oxide resistance sheet is a high-power semiconductor and belongs to the application category of new materials. The zinc oxide resistance sheet is a typical ceramic electrical component and is mainly used as an overvoltage protection device and a voltage sensor. The zinc oxide resistance sheet is mainly used for assembling a zinc oxide lightning arrester and a monitoring instrument to protect various electrical equipment in an electric network from overvoltage damage. During the production of the zinc oxide resistance sheet, the powder needs to be screened to remove the large particles in the powder after grinding.

[0003] For example, a powder screening machine is disclosed in Chinese Patent No. CN201310444065.0, which comprises a shell, a screen, a frame, a rotating shaft and a driving device. The screen is fixed in the frame, the rotating shaft is fixed at the center of the side surface of the frame, and the frame is rotatably fixed in the shell through the rotating shaft. The driving device is connected with the frame and drives the frame to reciprocatingly swing.

[0004] According to the related technology in the above, the inventors believe that the following technical defects need to be improved:

[0005] Most of the screen in the powder screening equipment on the market is generally arranged horizontally or obliquely. After working for a period of time, a large amount of large particles will inevitably accumulate on the upper surface of the screen or the bottom of the screen. These large particles are difficult to automatically discharge easily and need to be cleaned by the workers after stopping the machine, which is not conducive to efficient screening of the powder. CONTENT OF THE INVENTION

[0006] The application provides a zinc oxide voltage-dependent resistor powder screening device to improve the following technical problems:

[0007] Most of the screen in the powder screening equipment on the market is generally arranged horizontally or obliquely. After working for a period of time, a large amount of large particles will inevitably accumulate on the upper surface of the screen or the bottom of the screen. These large particles are difficult to automatically discharge easily and need to be cleaned by the workers after stopping the machine, which is not conducive to efficient screening of the powder.

[0008] The application provides a zinc oxide voltage-dependent resistor powder screening device, which adopts the following technical scheme:

[0009] A kind of zinc oxide varistor powder sieve device, including support, bottom plate, processing bin, granule discharge cylinder, sieve cone screen, material guide cover and drive assembly, the bottom plate is installed in the top of the support and horizontally arranged, the middle part of the bottom plate is provided with granule discharge port, the circumferential side of the bottom plate is provided with annular powder discharge port, the bottom plate is also placed with powder collection box below, the granule collection box is also placed below the granule discharge port, the granule collection box is placed in the powder collection box, the top of the granule discharge cylinder is fixed and communicated at the bottom opening of the sieve cone screen, the bottom of the granule discharge cylinder is opposite to the granule discharge port, the material guide cover is installed on the bottom plate and the granule discharge cylinder penetrates the material guide cover, installation cavity is formed between the material guide cover and the bottom plate, the drive assembly is installed in the installation cavity and is used to drive the granule discharge cylinder, the sieve cone screen rotates around the central axis.

[0010] In an implementable technical solution of the present application, the drive assembly includes a ring gear, a driving gear and a servo motor, the servo motor is vertically installed on the bottom plate, the driving gear is fixed on the output shaft of the servo motor, the granule discharge cylinder penetrates the ring gear and the two are fixedly connected, and the driving gear is engaged with the outer teeth of the ring gear.

[0011] In an implementable technical solution of the present application, the material guide cover includes a vertical cylinder and a conical cover, the top of the vertical cylinder is fixed to the bottom of the conical cover, and the bottom of the vertical cylinder is fixed to the inner circumferential edge of the annular powder discharge port.

[0012] In an implementable technical solution of the present application, the material guide cover is a stainless steel part, and the height of the vertical cylinder is between 30-50 cm.

[0013] In an implementable technical solution of the present application, the top of the sieve cone screen abuts against the inner circumferential wall of the processing bin and the two are rotationally assembled, the top surface of the processing bin is higher than the top surface of the sieve cone screen, and the height difference between the two is between 5-10 cm.

[0014] In an implementable technical solution of the present application, a plurality of inclined blocking plates are vertically connected to the inner side wall of the sieve cone screen, and the inclination directions of all the blocking plates are consistent.

[0015] In an implementable technical solution of the present application, all the blocking plates are arranged in parallel, and the adjacent blocking plates above and below are arranged in staggered positions.

[0016] In an implementable technical solution of the present application, the inclination angle of the blocking plate is between 30-45 degrees, and the blocking plate, the granule discharge cylinder and the sieve cone screen are all stainless steel parts.

[0017] In summary, this application includes at least one of the following beneficial technical effects:

[0018] Powder can be poured from the top opening of the processing chamber onto the screening conical screen. Combined with the drive component, the screening conical screen can be rotated, and the powder can then undergo fine screening. Larger particles can fall from the particle discharge port into the particle collection box along the particle discharge cylinder, while qualified powder can fall directly or slide down the guide hood into the powder collection box. The overall structure is simple and stable in operation, and the operation is very convenient. The particles obtained after screening can be automatically collected into the particle collection box without cleaning, reducing cleaning work and facilitating efficient screening of powder. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of the zinc oxide varistor powder screening device according to an embodiment of this application.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Bracket;

[0023] 2. Base plate; 21. Particle discharge port; 22. Annular powder discharge port;

[0024] 3. Processing warehouse;

[0025] 4. Pellet feeding cylinder;

[0026] 5. Screening cone mesh;

[0027] 6. Material guide cover; 61. Vertical cylinder; 62. Conical cover;

[0028] 7. Drive components; 71. Ring gear; 72. Drive gear; 73. Servo motor;

[0029] 8. Powder collection box;

[0030] 9. Particle collection box;

[0031] 10. Material blocking plate. Detailed Implementation

[0032] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0033] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0034] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0036] The following is in conjunction with the appendix Figure 1 This application will be described in further detail.

[0037] This application discloses a zinc oxide varistor powder screening device. (Refer to...) Figure 1 The zinc oxide varistor powder screening device includes a support 1, a base plate 2, a processing chamber 3, a particle feeding cylinder 4, a screening conical mesh 5, a guide cover 6, and a drive assembly 7. The base plate 2 is installed on the top of the support 1 and is arranged horizontally. A particle feeding port 21 is provided in the middle of the base plate 2, and an annular powder feeding port 22 is provided on the periphery of the base plate 2. A powder collection box 8 is also placed below the base plate 2, and a particle collection box 9 is also placed below the particle feeding port 21. The particle collection box 9 is placed inside the powder collection box 8. The top of the particle feeding cylinder 4 is fixed and connected to the bottom opening of the screening conical mesh 5. The bottom of the particle feeding cylinder 4 is directly opposite the particle feeding port 21. The guide cover 6 is installed on the base plate 2 and the particle feeding cylinder 4 passes through the guide cover 6. An installation chamber is formed between the guide cover 6 and the base plate 2. The drive assembly 7 is installed in the installation chamber and is used to drive the particle feeding cylinder 4 and the screening conical mesh 5 to rotate around the central axis.

[0038] In this embodiment, the drive assembly 7 includes a ring gear 71, a drive gear 72, and a servo motor 73. The servo motor 73 is vertically mounted on the base plate 2, and the drive gear 72 is fixed to the output shaft of the servo motor 73. The particle feed cylinder 4 passes through the ring gear 71 and the two are fixedly connected. The drive gear 72 meshes with the external teeth of the ring gear 71. The drive assembly 7 designed above has a simple structure, stable operation, and convenient operation, and can stably drive the particle feed cylinder 4 to rotate.

[0039] In this embodiment, the guide cover 6 includes a vertical cylinder 61 and a conical cover 62. The top of the vertical cylinder 61 is fixed to the bottom of the conical cover 62, and the bottom of the vertical cylinder 61 is fixed to the inner circumference of the annular powder discharge port 22. The guide cover 6 is made of stainless steel, and the height of the vertical cylinder 61 is between 30 and 50 centimeters. The guide cover 6 designed above has a simple and robust structure, provides good protection for the drive assembly 7 in the installation chamber, and prevents powder from accumulating on the outer surface of the guide cover 6.

[0040] In this embodiment, the top of the sieving conical mesh 5 abuts against the inner peripheral wall of the processing chamber 3 and the two are rotatably assembled. The top surface of the processing chamber 3 is higher than the top surface of the sieving conical mesh 5 and the height difference between the two is between 5-10 cm. In order to prolong the contact time between the powder and the sieving conical mesh 5, multiple inclined baffle plates 10 are vertically connected to the inner side wall of the sieving conical mesh 5. All baffle plates 10 have the same inclination direction, and all baffle plates 10 are arranged in parallel. The baffle plates 10 are staggered between adjacent baffle plates.

[0041] Specifically, the inclination angle of the baffle plate 10 is between 30 and 45 degrees, and the baffle plate 10, the particle feeding cylinder 4, and the screening cone 5 are all made of stainless steel.

[0042] The beneficial technical effects of the zinc oxide varistor powder screening device in this application are roughly as follows:

[0043] Powder can be poured from the top opening of the processing chamber 3 onto the screening cone 5. Combined with the drive component 7, the screening cone 5 can be rotated, and the powder can be finely screened through the screening cone 5. Larger particles can fall from the particle discharge port 21 along the particle discharge cylinder 4 into the particle collection box 9, while qualified powder can fall directly or slide down the guide cover 6 into the powder collection box 8. The overall structure is simple and stable in operation, and the operation is very convenient. The particles obtained after screening can be automatically collected into the particle collection box 9 without cleaning, reducing cleaning work and facilitating efficient screening of powder.

[0044] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A zinc oxide varistor powder screening device, characterized by, The utility model relates to a kind of powder and particle processing equipment, including support (1), bottom plate (2), processing bin (3), particle discharging cylinder (4), sieve cone net (5), material guide cover (6) and drive assembly (7), the bottom plate (2) is installed in the top of the support (1) and horizontally arranged, the middle part of the bottom plate (2) is provided with particle discharging port (21), the circumferential side of the bottom plate (2) is provided with annular powder discharging port (22), the bottom plate (2) is also placed with powder collecting box (8) below, the particle collecting box (9) is placed in the powder collecting box (8) below the particle discharging port (21), the particle discharging cylinder (4) top is fixed and communicated with the bottom opening of the sieve cone net (5), the bottom of the particle discharging cylinder (4) is opposite to the particle discharging port (21), the material guide cover (6) is installed on the bottom plate (2) and the particle discharging cylinder (4) penetrates the material guide cover (6), installation chamber is formed between the material guide cover (6) and the bottom plate (2), the drive assembly (7) is installed in the installation chamber and is used to drive the particle discharging cylinder (4), the sieve cone net (5) rotates around the central axis.

2. The zinc oxide varistor powder sieving device according to claim 1, wherein, The drive assembly (7) includes ring gear (71), driving gear (72) and servo motor (73), the servo motor (73) is vertically installed on the bottom plate (2), the driving gear (72) is fixed on the output shaft of the servo motor (73), the particle discharging cylinder (4) penetrates the ring gear (71) and is fixedly connected, the driving gear (72) is engaged with the outer teeth of the ring gear (71).

3. The zinc oxide varistor powder sieving device according to claim 1, wherein, The material guide cover (6) includes vertical cylinder (61) and conical cover (62), the top of the vertical cylinder (61) is fixed to the bottom of the conical cover (62), and the bottom of the vertical cylinder (61) is fixed to the inner circumferential edge of the annular powder discharging port (22).

4. The zinc oxide varistor powder sieving device according to claim 3, wherein The material guide cover (6) is a stainless steel part, and the height of the vertical cylinder (61) is between 30-50 cm.

5. The zinc oxide varistor powder sieving device according to claim 1, wherein, The top of the sieve cone net (5) abuts against the inner circumferential wall of the processing bin (3) and is rotatably assembled, the top surface of the processing bin (3) is higher than the top surface of the sieve cone net (5), and the height difference between them is between 5-10 cm.

6. The zinc oxide varistor powder sieving device according to claim 1, wherein A plurality of inclined blocking plates (10) are vertically connected to the inner side wall of the sieve cone net (5), and the inclination directions of all the blocking plates (10) are consistent.

7. The zinc oxide varistor powder sieving device according to claim 6, wherein All the blocking plates (10) are arranged in parallel, and the upper and lower adjacent blocking plates (10) are arranged in staggered manner.

8. The zinc oxide varistor powder sieving device according to claim 6, wherein, The inclination angle of the blocking plate (10) is between 30-45 degrees, and the blocking plate (10), the particle discharging cylinder (4) and the sieve cone net (5) are all stainless steel parts.

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