Powder grinding device in zinc oxide resistor disc production process

Abstract

The utility model relates to the technical field of resistor disc raw material processing, and particularly discloses a powder grinding device in a zinc oxide resistor disc production process, which comprises a grinding box and supporting legs at the bottom of the grinding box, a feed port is arranged on the top surface of the grinding box, and grinding rollers matched with each other are respectively arranged in the grinding box corresponding to two ends of the feed port. A U-shaped frame capable of swinging left and right is arranged in the grinding box below the grinding roller, a drawable screen is arranged in the U-shaped frame, a discharging through groove is formed in the bottom wall, corresponding to the screen, of the U-shaped frame, a box cover is hinged to the end face, corresponding to the end of the screen, of the grinding box, and a positioning device is further arranged between the screen and the U-shaped frame. According to the powder screening device, powder can be comprehensively and effectively screened, large particles on the surface of the screen can be conveniently and rapidly collected after screening is completed, and therefore the use efficiency of the powder screening device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of resistor raw material processing, in particular to a powder grinding device in the production process of zinc oxide resistors. Background Art

[0002] Zinc oxide resistor is a sensitive component, a high-power semiconductor, and belongs to the category of new material application. It is a typical ceramic electrical component. As an overvoltage protection device and voltage sensor, it is mainly used to assemble zinc oxide lightning arresters and monitoring instrument products to protect various electrical equipment running in the power grid from overvoltage damage.

[0003] During the use of powder grinding equipment in the production process of zinc oxide resistors, the screen is usually fixed, which cannot effectively screen the ground powder; and after the screening is completed, the larger particles remaining above the screen cannot be cleaned conveniently and quickly, reducing the efficiency of the device. Utility Model Content

[0004] The technical problem to be solved by the utility model is that the ground powder cannot be screened comprehensively and effectively, and large particles on the screen surface cannot be cleaned conveniently and quickly after screening, resulting in reduced efficiency of the device.

[0005] In order to solve the above problems, the technical solution of the utility model is: a powder grinding device in the production process of zinc oxide resistors, comprising a grinding box and supporting legs at the bottom of the grinding box, a feed inlet is arranged on the top surface of the grinding box, grinding rollers that cooperate with each other are arranged in the grinding box corresponding to the two ends of the feed inlet, and a discharge port is arranged at the bottom of the grinding box;

[0006] A U-shaped frame that can swing left and right is provided in the grinding box below the grinding roller, a pull-out screen is provided in the U-shaped frame, a material discharge slot is provided on the bottom wall of the U-shaped frame corresponding to the screen, a box cover is hinged on the end face of the grinding box corresponding to the end of the screen, and a positioning device is also provided between the screen and the U-shaped frame.

[0007] Furthermore, guide rods are respectively provided on the grinding box corresponding to the four corners of the outer end face of the U-shaped frame, and the inner ends of the four guide rods are respectively fixedly connected to the U-shaped frame. A connecting seat is commonly provided at the outer ends of the two guide rods on the right side, and a return spring 1 is wound on the guide rod between the connecting seat and the outer wall of the grinding box, and a return spring 2 is also wound on the guide rod between the U-shaped frame and the inner wall of the grinding box. An adjusting device for controlling the guide rod to swing left and right is provided on the connecting seat.

[0008] Furthermore, the adjusting device includes a roller and a cam, a mounting frame is provided in the middle of the end face of the connecting seat and a roller is rotatably arranged in the mounting frame, a supporting seat is provided on the outer wall of the grinding box and a rotating shaft is passed through the supporting seat, a cam matched with the roller is fixed on the rotating shaft, and the bottom end of the rotating shaft is connected to the output shaft of the motor.

[0009] Furthermore, the positioning device includes a fixed seat and a positioning pin. A fixed seat is provided on the inner wall of the screen. A cavity is opened on the fixed seat and a positioning pin that can move up and down is passed through the cavity. A pressure plate is fixed on the positioning pin near the bottom wall of the cavity, and a reset spring three is wound between the pressure plate and the top wall of the cavity. A pin hole matching the positioning pin is opened on the bottom surface of the U-shaped frame at the corresponding position of the positioning pin.

[0010] Furthermore, slide rails are fixedly provided on the inner walls at both ends of the U-shaped frame along the width direction thereof, and sliding seats adapted thereto are provided in the two slide rails respectively, and the opposite end surfaces of the two sliding seats are fixedly connected to the end surface of the screen respectively.

[0011] The advantages of the utility model compared with the existing technology are:

[0012] 1. Through the action of the U-shaped frame and screen that can swing left and right, and the cooperation of the guide rod, the first reset spring, the second reset spring, the roller, the rotating shaft and the cam, the ground powder can be screened comprehensively and evenly during use by controlling the left and right swing adjustment of the screen, thereby improving the quality requirements of the powder;

[0013] 2. With the hinged box cover on the end face of the grinding box and the pull-out screen in the U-shaped frame, as well as the cooperation of the positioning device, after the screening is completed, the box cover can be opened first, and then the positioning device can be released. Under the action of external force, the screen can be pulled to the outside of the grinding box, and the larger particles on the screen can be cleaned conveniently and quickly, thereby improving the use efficiency of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is the external structure diagram of the utility model.

[0015] Figure 2 It is the front internal structure diagram of the utility model.

[0016] Figure 3 It is a top view of the internal structure of the utility model.

[0017] Figure 4 It is an internal structure diagram of the fixing seat in the utility model.

[0018] As shown in the figure: 1. Grinding box; 2. Support legs; 3. Feed port; 4. Grinding roller; 5. U-shaped frame; 6. Screen; 7. Slide rail; 8. Sliding seat; 9. Guide rod; 10. Reset spring one; 11. Reset spring two; 12. Connecting seat; 13. Roller; 14. Support seat; 15. Rotating shaft; 16. Cam; 17. Motor; 18. Fixed seat; 19. Cavity; 20. Positioning pin; 21. Press plate; 22. Reset spring three; 23. Discharge port; 24. Box cover. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0020] Embodiment 1

[0021] like Figures 1 to 3 As shown, a powder grinding device in the production process of zinc oxide resistors includes a grinding box 1 and a supporting leg 2 at the bottom of the grinding box 1. A feed port 3 is provided on the top surface of the grinding box 1. Grinding rollers 4 that cooperate with each other are provided in the grinding box 1 at the two ends of the feed port 3. The raw materials are ground by the relative rotation of the grinding rollers 4. A discharge port 23 is provided at the bottom of the grinding box 1. The above features belong to the prior art.

[0022] A U-shaped frame 5 that can swing left and right is provided in the grinding box 1 below the grinding roller 4, and a pull-out screen 6 is provided in the U-shaped frame 5. Slide rails 7 are fixedly provided on the inner walls at both ends of the U-shaped frame 5 along its width direction, and sliding seats 8 that are compatible with them are provided in the two slide rails 7 respectively. The opposite end faces of the two sliding seats 8 are fixedly connected to the end faces of the screen 6 respectively. With the cooperation of the slide rails 7 and the sliding seats 8, the screen 6 can be pulled and adjusted back and forth in its U-shaped frame 5, and a material discharge slot is provided on the bottom wall of the U-shaped frame 5 corresponding to the screen 6. A box cover 24 is hinged on the end face of the grinding box 1 corresponding to the end of the screen 6, and a lock is provided between the box cover 24 and the grinding box 1, and a positioning device is provided between the screen 6 and the U-shaped frame 5.

[0023] like Figure 2As shown, guide rods 9 are respectively provided on the grinding box 1 corresponding to the four corners of the outer end surface of the U-shaped frame 5, and the inner ends of the four guide rods 9 are respectively fixedly connected to the U-shaped frame 5. A connecting seat 12 is commonly provided at the outer ends of the two right guide rods 9. A return spring 10 is wound on the guide rod 9 between the connecting seat 12 and the outer wall of the grinding box 1, and a return spring 2 11 is also wound on the guide rod 9 between the U-shaped frame 5 and the inner wall of the grinding box 1. An adjusting device for controlling the guide rod 9 to swing left and right is provided on the connecting seat 12.

[0024] like Figure 3 As shown, the adjusting device includes a roller 13 and a cam 16, a mounting frame is provided in the middle of the end surface of the connecting seat 12 and the roller 13 is rotatably arranged in the mounting frame, a supporting seat 14 is provided on the outer wall of the grinding box 1 and a rotating shaft 15 is passed through the supporting seat 14 through a bearing support, a cam 16 adapted to the roller 13 is fixed on the rotating shaft 15, and the bottom end of the rotating shaft 15 is connected to the output shaft of the motor 17.

[0025] Through the above structure, the motor 17 is started to drive the rotating shaft 15 and the cam 16 to rotate. Under the cooperation of the cam 16 and the roller 13, the connecting seat 12 is driven to swing left and right, and then the guide rod 9 is driven to swing left and right. At the same time, the U-shaped frame 5 and the screen 6 are driven to swing left and right, so that the ground powder is comprehensively and evenly screened.

[0026] Embodiment 2

[0027] Based on the first embodiment, Figure 2 and Figure 4 As shown, the specific structure of the positioning device is as follows:

[0028] The positioning device includes a fixing seat 18 and a positioning pin 20. A fixing seat 18 is provided on the inner wall of the screen 6. A cavity 19 is opened on the fixing seat 18 and a positioning pin 20 that can move up and down is passed through the cavity 19. A pressure plate 21 is fixed on the positioning pin 20 near the bottom wall of the cavity 19, and a return spring 22 is wound between the pressure plate 21 and the top wall of the cavity 19. A pin hole matching the positioning pin 20 is opened on the bottom surface of the U-shaped frame 5 at a position corresponding to the positioning pin 20. With the cooperation of the positioning pin 20 and the pin hole, the screen 6 can be effectively positioned.

[0029] In specific use, the motor 17 is first started to drive the rotating shaft 15 to rotate, and then the cam 16 is driven to rotate. Under the cooperation of the cam 16 and the roller 13, the connecting seat 12 is driven to swing left and right, and then the guide rod 9 is driven to swing left and right. At the same time, the U-shaped frame 5 and the screen 6 are driven to swing left and right, and the ground powder is screened comprehensively and evenly. The screened powder is discharged and collected through the discharge port 23;

[0030] After the screening is completed, open the box cover 24, pull the positioning pin 20 upward to separate it from the pin hole, release the positioning of the screen 6, and then pull the screen 6 outward to move it to the outside of the grinding box 1. This allows for convenient and quick cleaning of larger particles on the surface of the screen 6, thereby improving the use efficiency of the device.

[0031] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.

Claims

1. A powder grinding device in the production process of zinc oxide resistors, comprising a grinding box (1) and a support leg (2) at the bottom of the grinding box (1), a feed inlet (3) being provided on the top surface of the grinding box (1), grinding rollers (4) for use with each other being provided in the grinding box (1) at the two ends of the feed inlet (3), and a discharge port (23) being provided at the bottom of the grinding box (1), characterized in that: A U-shaped frame (5) capable of swinging left and right is provided in the grinding box (1) below the grinding roller (4), a pull-out screen (6) is provided in the U-shaped frame (5), a material discharge slot is provided on the bottom wall of the U-shaped frame (5) corresponding to the screen (6), a box cover (24) is hingedly connected to the end face of the grinding box (1) corresponding to the end of the screen (6), and a positioning device is provided between the screen (6) and the U-shaped frame (5).

2. The powder grinding device in the production process of zinc oxide resistor according to claim 1, characterized in that: Guide rods (9) are respectively provided on the grinding box (1) corresponding to the four corners of the outer end surface of the U-shaped frame (5), and the inner ends of the four guide rods (9) are respectively fixedly connected to the U-shaped frame (5). A connecting seat (12) is commonly provided on the outer ends of the two right guide rods (9). A return spring 1 (10) is wound on the guide rod (9) between the connecting seat (12) and the outer wall of the grinding box (1), and a return spring 2 (11) is also wound on the guide rod (9) between the U-shaped frame (5) and the inner wall of the grinding box (1). An adjusting device for controlling the guide rod (9) to swing left and right is provided on the connecting seat (12).

3. The powder grinding device in the production process of zinc oxide resistor according to claim 2 is characterized in that: The adjusting device comprises a roller (13) and a cam (16); a mounting frame is provided at the middle of the end surface of the connecting seat (12) and the roller (13) is rotatably arranged in the mounting frame; a supporting seat (14) is provided on the outer wall of the grinding box (1) and a rotating shaft (15) is passed through the supporting seat (14); a cam (16) matched with the roller (13) is fixedly arranged on the rotating shaft (15), and the bottom end of the rotating shaft (15) is connected to the output shaft of the motor (17).

4. A powder grinding device in the production process of zinc oxide resistor according to any one of claims 1 to 3, characterized in that: The positioning device comprises a fixing seat (18) and a positioning pin (20). The fixing seat (18) is provided on the inner wall of the screen (6). A cavity (19) is provided on the fixing seat (18) and a positioning pin (20) is inserted in the cavity (19) and can move up and down. A pressing plate (21) is fixed on the positioning pin (20) near the bottom wall of the cavity (19), and a return spring (22) is wound between the pressing plate (21) and the top wall of the cavity (19). A pin hole matching the positioning pin (20) is provided on the bottom surface of the U-shaped frame (5) at a position corresponding to the positioning pin (20).

5. The powder grinding device in the production process of zinc oxide resistor according to claim 1, characterized in that: Slide rails (7) are fixedly provided on the inner walls at both ends of the U-shaped frame (5) along the width direction thereof, and sliding seats (8) adapted thereto are respectively provided in the two slide rails (7), and the opposite end faces of the two sliding seats (8) are respectively fixedly connected to the end faces of the screen (6).

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