Powder screening device capable of automatically recognizing edge damage of screen

Abstract

A powder screening device capable of automatically recognizing edge damage of a screen comprises a shell, a feeding port and a slag discharging port are formed in the upper portion of the shell, and a discharging port is formed in the lower portion of the shell. The shell is internally provided with a screen, the powder enters through the feeding port, and after the powder is screened by the screen, large-particle powder is discharged through the slag discharging port, and small-particle powder is discharged through the discharging port; a limiting switch supporting plate is arranged below the screen, and at least one limiting switch is arranged below the limiting switch supporting plate. The limiting switch is used for generating an abnormal signal after the limiting switch supporting plate receives the powder with the abnormal weight. A limit switch supporting plate is arranged below a screen of the powder screening device, and at least one limit switch is arranged below the limit switch supporting plate. And the limiting switch is used for generating an abnormal signal after the limiting switch supporting plate receives the powder with the abnormal weight so as to monitor the damage of the screen, and large particles are prevented from flowing out when the screen is damaged.

Description

Technical Field

[0001] The utility model relates to production equipment for positive and negative electrode materials of sodium ion batteries, in particular to a powder sieving device capable of automatically identifying damage to the edge of a sieve mesh. Background Art

[0002] In the production of existing positive and negative electrode materials for sodium ion batteries, an ultrasonic vibrating sieve mesh has a two-layer sieve mesh structure. Through the vibration of ultrasonic transducers and motors, the powder material is vibrated. Materials meeting the particle size requirements pass through the sieve mesh, and materials not meeting the particle size requirements are discharged through the slag discharge port. The vibrating sieve mesh is a closed structure device. When the sieve mesh is damaged, it cannot be detected in real time, resulting in the escape of large particle materials not meeting the particle size requirements, flowing into subsequent processes or even the client, causing production errors in products. Content of the Utility Model

[0003] The utility model aims to solve the above technical problems by adding a sieve mesh damage detection and identification device inside the sieve mesh, which can immediately identify and alarm when the sieve mesh is damaged, avoiding the outflow of large particle materials caused by sieve mesh damage. The specific technical solutions are as follows:

[0004] A powder sieving device capable of automatically identifying damage to the edge of a sieve mesh includes a housing. An inlet and a slag discharge port are provided above the housing, and an outlet is provided below the housing. A sieve mesh is provided inside the housing. The powder enters through the inlet, and after being screened by the sieve mesh, large particle powder is discharged through the slag discharge port, and small particle powder is discharged through the outlet. A limit switch support plate is provided below the sieve mesh, and at least one limit switch is provided below the limit switch support plate. The limit switch is used to generate an abnormal signal after the limit switch support plate receives powder with abnormal weight.

[0005] Preferably, the limit switch support plate is annular and is arranged around the inner wall of the housing. There are 4 limit switches, which are evenly distributed below the limit switch support plate.

[0006] Preferably, the sieve mesh is two-layered. The limit switch support plate and the limit switch are provided below each layer of the sieve mesh.

[0007] Preferably, it further includes a plurality of compressed air purge ports. The compressed air purge ports are arranged on one side of the limit switch support plate and are used to periodically purge the powder accumulated on the limit switch support plate.

[0008] Preferably, a vibration motor is provided on the housing part to vibrate the housing, and the powder passes through the sieve mesh in a vibrating manner.

[0009] Preferably, a plurality of ultrasonic transducers are further provided outside the housing, and the ultrasonic transducers generate ultrasonic waves to keep the powder on the sieve surface in a suspended state all the time.

[0010] The beneficial effects of the present utility model are as follows: A limit switch support plate is provided below the screen of the powder sieving device, and at least one limit switch is provided below the limit switch support plate; the limit switch is used to generate an abnormal signal after the limit switch support plate receives powder with an abnormal weight to realize the monitoring of screen breakage and avoid the outflow of large particles when the screen is broken. Description of the Drawings

[0011] The drawings described herein are used to provide a further understanding of the present utility model, form a part of the present utility model, and the schematic embodiments and descriptions thereof are used to explain the present utility model and do not constitute an improper limitation to the present utility model.

[0012] Figure 1 is a schematic three-dimensional structure diagram of the powder sieving device of the present utility model

[0013] Figure 2 is a top view of the powder sieving device of the present utility model;

[0014] Figure 3 is Figure 1 along Figure 2 sectional view of the A-A plane;

[0015] Figure 4 is Figure 3 structural diagram of the screen breakage detection and identification device in

[0016] Figure 5 is Figure 3 local enlarged view of area B in

[0017] Among them, 100 is the powder sieving device

[0018] 101 is the vibration motor

[0019] 102 is the ultrasonic transducer

[0020] 103 is the compressed air purge port

[0021] 104 is the slag discharge port

[0022] 105 is the feed port

[0023] 106 is the discharge port

[0024] 107 is the limit switch

[0025] 108 is the limit switch support plate

[0026] 109 is the screen

[0027] 110 is the housing

[0028] 120 is the limit switch support arm

[0029] 121 is the compression spring

[0030] 122 is the limit switch moving contact Detailed implementation manners

[0031] For a clearer illustration of the overall concept of this application, the following provides a detailed description by way of example in conjunction with the accompanying drawings of the specification.

[0032] As Figure 1 、 Figure 2 、 Figure 3 shown, a powder sieving device 100 capable of automatically identifying edge breakage of a sieve mesh includes a housing 110. The housing 110 is generally cylindrical, with a feed inlet 105 and a slag discharge port 104 provided above it, and a discharge outlet 106 provided below it. A sieve mesh 109 is provided inside the housing 110. The powder enters through the feed inlet 105, and after being sieved by the sieve mesh 109, the large-particle powder is discharged through the slag discharge port 104, and the small-particle powder is discharged through the discharge outlet 106. A vibration motor 101 is provided at the bottom of the housing 110 for generating vibration for the housing 110, and the powder passes through the sieve mesh 109 in a vibrating manner.

[0033] A plurality of ultrasonic transducers 102 are further provided around the outside of the housing 110. The ultrasonic transducers 102 generate ultrasonic waves to keep the powder on the sieve surface 109 in a suspended state all the time. After the powder material enters the ultrasonic vibrating sieve mesh device, under the action of the vibration motor 101, the material vibrates through the sieve mesh 109, and under the action of the ultrasonic transducers 102, the material on the sieve surface 109 is kept in a suspended state all the time, thereby suppressing adhesion, friction, settling, wedging, etc., and avoiding blockage of the powder material during sieving.

[0034] As Figure 3 shown, the sieve mesh 109 in the powder sieving device 100 has two layers for two-stage sieving to sieve out high-quality powder. A limit switch support plate 108 is provided below each layer of the sieve mesh 109, and at least one limit switch 107 is provided below the limit switch support plate 108.

[0035] When the edge of the sieve mesh 109 is damaged, the proportion of powder leakage at the edge of the sieve mesh 109 increases, and the material will fall on the limit switch support plate 108. When the weight exceeds the stroke of the limit switch 107, the limit switch 107 emits an overweight signal, thereby realizing the detection of sieve mesh breakage.

[0036] To prevent the weight of the materials naturally collected on the limit switch support plate 108 from exceeding the stroke of the limit switch 107, a compressed air purge port 103 is added. It is set on one side above one side of the switch support plate 108. At regular intervals, the materials naturally collected on the limit switch support plate 108 are purged regularly to prevent false alarms of the vibration screen breakage signal caused by excessive weight due to powder accumulation. However, when the screen 109 breaks, the leakage of large particles will result in faster mass accumulation than normal, thus triggering an overweight signal.

[0037] As Figure 4 shown, the limit switch support plate 108 is annular and is arranged around the inner wall of the housing 110; there are 4 limit switches 107, which are evenly distributed below the limit switch support plate 108. In fact, the number of limit switches 107 set is not necessarily 4. The setting of 2, 3 or other numbers of limit switches can still achieve the purpose of the present invention. The more the number, the more sensitive the sensing. When there is only 1, in fact, sensing can also be achieved. By supporting in other ways at other positions of other limit switch support plates 108, retaining 1 limit switch 107 can also achieve less sensitive sensing, which still does not exceed the protection scope of the present utility model.

[0038] As Figure 5 shown, the limit switch 107 is used to generate an abnormal signal after the limit switch support plate 108 receives powders with abnormal weight. The limit switch 107 is elastically provided with a limit switch support arm 120 obliquely upward to support the upper limit switch support plate 108. The limit switch 107 is supported by a compression spring 121. By adjusting the softness and hardness of the compression spring 121, the sensitivity of the limit switch 107 can be adjusted. The limit switch support arm 120 is also provided with a limit switch moving contact 122 at the root. When the limit switch support plate 108 receives powders with excessive weight, it will compress the limit switch support arm 120 downward. When the limit switch support arm 120 is compressed to a certain extent, the limit switch moving contact 122 can trigger the limit switch 107 to generate an abnormal signal to achieve overweight sensing.

[0039] The above examples are only embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, various changes and modifications can be made to the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the scope of the claims of the present utility model.

Claims

1. A powder screening device (100) capable of automatically identifying a damaged screen edge, characterized in that: It comprises a shell (110), wherein the shell (110) is provided with a feed port (105) and a slag discharge port (104) at the top, and a discharge port (106) at the bottom; A screen (109) is provided in the housing (110), and the powder enters through the feed port (105). After being screened by the screen (109), large-particle powder is discharged through the slag discharge port (104), and small-particle powder is discharged through the discharge port (106); A limit switch support plate (108) is provided below the screen (109), and at least one limit switch (107) is provided below the limit switch support plate (108); The limit switch (107) is used to generate an abnormal signal after the limit switch support plate (108) receives powder of abnormal weight.

2. The powder screening device (100) according to claim 1, characterized in that: The limit switch support plate (108) is annular and is arranged around the inner wall of the housing (110); There are four limit switches (107) evenly distributed below the limit switch support plate (108).

3. The powder screening device (100) according to claim 2, characterized in that: The screen (109) has two layers; The limit switch support plate (108) and the limit switch (107) are provided under each layer of the screen (109).

4. The powder screening device (100) according to claim 3, characterized in that: Also includes a plurality of compressed air purge ports (103); The compressed air purge port (103) is arranged on one side of the limit switch support plate (108) and is used to periodically purge the powder accumulated on the limit switch support plate (108).

5. The powder screening device (100) according to claim 1, characterized in that: A vibration motor (101) is provided at the bottom of the housing (110) for generating vibrations in the housing (110), so that the powder passes through the screen (109) in a vibrating manner.

6. The powder screening device (100) according to claim 1, characterized in that: A plurality of ultrasonic transducers (102) are also provided outside the shell (110), and the ultrasonic transducers (102) generate ultrasonic waves so that the powder on the screen (109) always remains in a suspended state.

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