Pulse dust removal type vibrating screen

Abstract

The utility model discloses a pulse dust removal type vibrating screen, which relates to the technical field of agricultural grain machinery and comprises a support, a plurality of driving wheels are fittingly mounted on the lower side of the support, a plurality of buffer seats are mounted on the support, a vibrating screen body is fittingly mounted on the buffer seats, and a first screen and a second screen are fittingly mounted in the vibrating screen body. And a vibration motor is installed on the outer side of the vibration screen body in a matched mode, a first impurity removal box and a second impurity removal box are installed on the support in a matched mode, a rotating shaft is installed in the secondary treatment cavity in a matched mode, and a plurality of grain beating rods are installed on the rotating shaft in a matched mode. In the implementation process, secondary impurity separation can be carried out on pre-screened grains, so that the impurity rate of the grains is greatly reduced, the cleanliness grade of finished grains is remarkably improved, and the process requirement of a subsequent deep processing procedure on the purity of raw materials is met.

Description

Technical Field

[0001] This utility model relates to the field of agricultural and grain machinery technology, specifically to a pulse dust removal vibrating screen. Background Technology

[0002] A vibrating screen is a high-efficiency screening device that uses the vibration of a vibrating screen mesh to quickly separate and filter materials on the screen surface. The vibrating screen mainly consists of a vibrating motor, a screen box, and a screen mesh. When working, the vibrating motor drives the screen box to vibrate, causing the materials to roll and jump continuously on the screen surface, thereby achieving the purpose of separation and screening.

[0003] Currently, after grains are screened using vibrating screens, a significant amount of dust and impurities remain on the surface, causing the material cleanliness to fail to meet the standards required for subsequent processes. This not only affects the continuity of the production process but also significantly diminishes the core functional value of the vibrating screen. This problem exposes technical bottlenecks in the surface cleaning efficiency and secondary pollution control of current screening equipment, directly impacting grain processing quality and overall equipment efficiency. Utility Model Content

[0004] To address the problem of dust on the surface of grain after screening by a vibrating screen, as mentioned in the background section, the purpose of this invention is to provide a pulse dust removal vibrating screen.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a pulse dust removal vibrating screen, comprising a support frame, a plurality of drive wheels mounted on the lower side of the support frame, a plurality of buffer seats mounted on the support frame, a vibrating screen body mounted on the buffer seats, a first screen and a second screen mounted inside the vibrating screen body, a vibrating motor mounted on the outer side of the vibrating screen body, a first impurity removal box and a second impurity removal box mounted on the support frame, the first impurity removal box and the second impurity removal box being connected by a first channel, a third impurity removal box mounted on one side of the vibrating screen body, the third impurity removal box being connected to the second impurity removal box by a third channel, and the third impurity removal box being located between the second impurity removal box and the vibrating screen body;

[0006] The third impurity removal box is provided with a primary impurity removal chamber and a secondary processing chamber. The vibrating screen body is provided with a first impurity discharge trough, a second impurity discharge trough and a third impurity discharge trough. The second impurity discharge trough is located between the first screen and the second screen and extends into the primary impurity removal chamber.

[0007] A rotating shaft is installed in the secondary processing chamber, and several grain-beating rods are installed on the rotating shaft. A dust-collecting plate is installed in the secondary processing chamber, and the dust-collecting plate is connected to the third channel through the second channel. A dust-collecting bag is provided in the first impurity removal box, and a pulse generator is installed on one side of the first impurity removal box. The pulse generator is configured in conjunction with the dust-collecting bag.

[0008] Preferably, the grain-beating rod is spirally arranged along the axis of rotation.

[0009] Preferably, the first waste outlet is located above the first screen, and the third waste outlet is located below the second screen.

[0010] Preferably, the first screen and the second screen are arranged in parallel, the first screen is located above the second screen, the mesh number of the first screen is smaller than the mesh number of the second screen, and the first screen and the second screen are arranged at an angle.

[0011] Preferably, a first drive motor is installed on one side of the third impurity removal box, and the first drive motor is connected to the rotating shaft via a coupling.

[0012] Preferably, a guide plate is installed in the secondary processing chamber, the guide plate is configured to cooperate with the dust collection plate, the dust collection plate is connected to the second impurity removal box through a second channel, and two opposing first baffles are installed in the second impurity removal box, forming a vertical fourth channel between the two first baffles.

[0013] Preferably, a feed hopper is installed on the upper side of the vibrating screen body, the vibrating screen body is inclined, and ash discharge augers are installed on the lower side of both the first and second impurity removal boxes.

[0014] Preferably, a second baffle is installed inside the first impurity removal box, and the second baffle is configured to cooperate with the first channel. A plurality of third baffles are also installed inside the first impurity removal box, and the third baffles are arranged in parallel with each other.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] 1. In the implementation of this utility model, the pre-screened grain first enters the primary impurity removal chamber for initial dust removal treatment, and then falls into the secondary processing chamber by gravity. In the secondary processing chamber, there is a high-speed rotating grain-beating rod that impacts the falling grain at a specific frequency, effectively removing dust and impurities attached to the surface of the grain. The impacted grain is then thrown by centrifugal force onto the resonant dust removal plate set on the chamber wall. The vibration effect generated by the collision achieves secondary impurity separation. This device innovatively adopts a two-stage linkage physical impurity removal mechanism. Through the synergistic effect of impact peeling and collision separation, the impurity content of the grain is reduced to below 0.3%, significantly improving the cleanliness level of the finished grain and meeting the process requirements of raw material purity for subsequent deep processing.

[0017] 2. The pulse bag dust collection system of this utility model innovatively designs a two-stage impurity removal box structure. Through the chambered processing technology, it significantly improves the dust removal efficiency of grain. The device uses the synergistic effect of the two-stage impurity removal boxes to remove impurities of different particle sizes in a gradient manner: the second impurity removal box mainly intercepts physical impurities such as large particles of sand and gravel and straw fragments, while the first impurity removal box focuses on removing fine particulate matter such as dust. This graded collection mechanism not only achieves a significant increase in dust removal rate (about 40% higher than the traditional single-box structure), but more importantly, it can accurately identify the specific composition and morphological characteristics of mixed impurities by the difference in particle size distribution and physical properties of the collected materials in the two chambers. Based on this differentiated detection data, operators can adaptively adjust the subsequent vibrating screening parameters through the intelligent control system, such as dynamically optimizing key parameters such as screen vibration frequency, amplitude, and tilt angle, thereby constructing a closed-loop dust removal quality control system. This provides reliable data support for optimizing the grain processing process and ensures that the finished grain meets the national cleanliness standards (impurity content ≤0.3%). Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the basic structure of the pulse dust removal vibrating screen of this utility model.

[0019] Figure 2 This is a schematic diagram of the internal structure of the pulse dust removal vibrating screen of this utility model.

[0020] Figure 3 This invention relates to a pulse dust removal vibrating screen. Figure 2 The main view.

[0021] Figure 4 This is a schematic diagram of the internal structure of the third impurity removal box of the pulse dust removal vibrating screen of this utility model.

[0022] Figure 5 This is a flow path diagram of grain and dust in the pulse dust removal vibrating screen of this utility model.

[0023] In the diagram: 101, support frame; 102, drive wheel; 103, buffer seat; 104, vibrating screen body; 105, first screen; 106, second screen; 107, first waste discharge chute; 108, second waste discharge chute; 109, third waste discharge chute; 110, feed hopper; 111, vibrating motor; 201, first waste removal box; 202, second waste removal box; 203, third waste removal box; 2031, primary waste removal chamber; 2032 204. Secondary processing chamber; 205. Rotating shaft; 206. First drive motor; 207. Grain feeding rod; 208. Dust suction plate; 209. Second channel; 210. First baffle; 211. Fourth channel; 212. Ash discharge auger; 213. First channel; 2014. Dust collector bag; 215. Pulse generator; 2016. Guide plate; 217. Second baffle; 218. Third channel; 219. Third baffle. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] like Figure 1-4 As shown, the pulse dust removal vibrating screen provided in this embodiment includes a support 101, with several drive wheels 102 mounted on the lower side of the support 101, and several buffer seats 103 mounted on the support 101.

[0026] A vibrating screening system is installed on the buffer seat 103;

[0027] The vibrating screening system includes a vibrating screen body 104, a first screen 105 and a second screen 106 are installed inside the vibrating screen body 104, and a vibrating motor 111 is installed on the outside of the vibrating screen body 104. The first screen 105 and the second screen 106 are arranged in parallel, with the first screen 105 located above the second screen 106. The mesh size of the first screen 105 is smaller than that of the second screen 106. The first screen 105 and the second screen 106 are arranged at an angle.

[0028] A first impurity removal box 201 and a second impurity removal box 202 are installed on the support 101. The first impurity removal box 201 and the second impurity removal box 202 are connected by a first channel 212. A feed hopper 110 is installed on the upper side of the vibrating screen body 104. The vibrating screen body 104 is set at an inclination.

[0029] The vibrating screen body 104 is provided with a first impurity discharge trough 107, a second impurity discharge trough 108 and a third impurity discharge trough 109. The first impurity discharge trough 107 is located above the first screen 105, the third impurity discharge trough 109 is located below the second screen 106, and the second impurity discharge trough 108 is located between the first screen 105 and the second screen 106. The first impurity discharge trough 107, the second impurity discharge trough 108 and the third impurity discharge trough 109 correspond to the directional discharge of large particle impurities, intermediate impurities and fine fragments, respectively.

[0030] The 111 vibrating motor drives the screen body to generate three-dimensional vibration, which, combined with the 5°-15° tilt angle of the two layers of screen mesh, effectively improves the flowability of grain and screening efficiency.

[0031] A multi-stage impurity removal system is installed on bracket 101;

[0032] The multi-stage impurity removal system includes a first impurity removal box 201, a second impurity removal box 202, and a third impurity removal box 203. The third impurity removal box 203 is located between the second impurity removal box 202 and the vibrating screen body 104. The third impurity removal box 203 and the second impurity removal box 202 are connected by a third channel 213. The first impurity removal box 201, the second impurity removal box 202, and the third impurity removal box 203 are welded to the support 101. The first impurity removal box 201 and the second impurity removal box 202 are connected by a first channel 212.

[0033] The third impurity removal box 203 is provided with a primary impurity removal chamber 2031 and a secondary processing chamber 2032. The second impurity discharge trough 108 extends into the primary impurity removal chamber 2031. The primary impurity removal chamber 2031 is provided with a guide slope to make the material spread evenly in the processing area.

[0034] A rotating shaft 204 is installed in the secondary processing chamber 2032, and a first drive motor 205 is installed on one side of the third impurity removal box 203. The first drive motor 205 is connected to the rotating shaft 204 through a coupling.

[0035] Several grain-beating rods 206 are installed on the rotating shaft 204. The grain-beating rods 206 are spirally arranged along the axial direction of the rotating shaft 204, and the surface of the grain-beating rods 206 is provided with anti-tangling protrusions.

[0036] A dust-collecting plate 207 is installed in the secondary processing chamber 2032, and a guide plate 2013 is installed in the secondary processing chamber 2032. The guide plate 2013 is configured to cooperate with the dust-collecting plate 207, and the dust-collecting plate 207 is connected to the second impurity removal box 202 through the second channel 208.

[0037] The second dust removal box 202 has two opposing first baffles 209 installed inside, forming a vertical fourth channel 210 between the two first baffles 209. The fourth channel 210 formed by the two first baffles 209 inside the second dust removal box 202 creates a Venturi effect, accelerating dust settling.

[0038] The first dust removal box 201 is equipped with a dust removal bag 2011. A pulse generator 2012 is installed on one side of the first dust removal box 201. The pulse generator 2012 is set in conjunction with the dust removal bag 2011. The first dust removal box 201, the second dust removal box 202, the third dust removal box 203 and the third channel 213 are equipped with linked differential pressure sensors to realize differential pressure triggered backflushing of the dust removal bag 2011.

[0039] Both the first impurity removal box 201 and the second impurity removal box 202 are equipped with ash discharge augers 211 on their lower sides. The ash discharge augers 211 are equipped with variable frequency motors and automatically adjust the impurity discharge speed according to the material flow rate.

[0040] A second baffle 2014 is installed inside the first dust removal box 201. The second baffle 2014 is configured to cooperate with the first channel 212. Several third baffles 214 are installed inside the first dust removal box 201. The third baffles 214 are arranged in parallel with each other. The third baffles 214 and the second baffles 2014 form a multi-stage collision dust removal path.

[0041] It should be noted that, referring to Figure 5(The large black arrow indicates the direction of grain flow, the small white arrow indicates the direction of airflow carrying dust, and the small black arrow indicates the direction of dust deposition.) The grain to be screened enters the vibrating screen body 104 through the feed hopper 110, and completes three-stage sorting under the synergistic action of the double screens: large particles of impurities are discharged from the system through the first impurity outlet 107; small particles of impurities are output through the third impurity outlet 109; and grain that meets the particle size requirements enters the primary impurity removal chamber 2031 through the second impurity outlet 108. It should be noted that at this time, the surface of the qualified material still has trace amounts of small particles of impurities and dust attached. After the grain that meets the particle size requirements enters the primary impurity removal chamber 2031, the grain will undergo the first dust removal treatment. Through the negative pressure airflow generated by the pulse generator 2012, the floating dust and some loose impurities on the surface of the grain will be effectively stripped off. The grain that has completed the first dust removal then enters the secondary processing chamber 2032 for a second effective stripping of impurities from the grain surface. The secondary processing chamber 2032 is configured with... The high-speed rotating grain beater 206 strikes the grain, effectively removing dust and impurities adhering to the grain surface. The impacted grains are then propelled by centrifugal force onto a resonant dust collector plate on the cavity wall. The vibration effect generated by the collision achieves secondary impurity separation. The separated suspended impurities are captured by the suction plate 207 and introduced into the second impurity removal box 202 through the second channel 208. In the fourth channel 210 of the second impurity removal box 202, gas-solid separation is achieved through pressure gradient changes: firstly, the pressure drop change completes the primary settling of large dust particles; then, the third baffle 214 guides the airflow to form controllable turbulence, promoting the collision and aggregation of submicron dust particles; finally, the dust collector bag 2011 performs terminal fine filtration, and the pulse back-flushing system periodically removes the dust accumulated in the filter bag to ensure continuous and efficient filtration performance. The collected impurities are centrally transported through a closed ash discharge auger 211, achieving the environmental protection requirement of "no impurities on the ground" throughout the entire process.

[0042] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pulse dust collector vibrating screen, comprising a support (101), wherein a plurality of drive wheels (102) are fitted on the lower side of the support (101), a plurality of buffer seats (103) are mounted on the support (101), a vibrating screen body (104) is fitted on the buffer seats (103), a first screen (105) and a second screen (106) are fitted inside the vibrating screen body (104), and a vibrating motor (111) is fitted on the outer side of the vibrating screen body (104), characterized in that: A first impurity removal box (201) and a second impurity removal box (202) are installed on the support (101). The first impurity removal box (201) and the second impurity removal box (202) are connected by a first channel (212). A third impurity removal box (203) is installed on one side of the vibrating screen body (104). The third impurity removal box (203) is connected to the second impurity removal box (202) by a third channel (213). The third impurity removal box (203) is located between the second impurity removal box (202) and the vibrating screen body (104). The third impurity removal box (203) is provided with a primary impurity removal chamber (2031) and a secondary processing chamber (2032). The vibrating screen body (104) is provided with a first impurity discharge trough (107), a second impurity discharge trough (108) and a third impurity discharge trough (109). The second impurity discharge trough (108) is located between the first screen (105) and the second screen (106). The second impurity discharge trough (108) extends into the primary impurity removal chamber (2031). A rotating shaft (204) is installed in the secondary processing chamber (2032), and several grain-beating rods (206) are installed on the rotating shaft (204). A dust-collecting plate (207) is installed in the secondary processing chamber (2032), and the dust-collecting plate (207) is connected to the third channel (213) through a second channel (208). A dust-collecting bag (2011) is provided in the first impurity removal box (201), and a pulse generator (2012) is installed on one side of the first impurity removal box (201). The pulse generator (2012) is configured in conjunction with the dust-collecting bag (2011).

2. The pulse dust removal vibrating screen according to claim 1, characterized in that: The grain-beating rod (206) is spirally arranged along the axis of the rotating shaft (204).

3. The pulse dust removal vibrating screen according to claim 1, characterized in that: The first discharge trough (107) is located above the first screen (105), and the third discharge trough (109) is located below the second screen (106).

4. The pulse dust removal vibrating screen according to claim 1, characterized in that: The first screen (105) and the second screen (106) are arranged in parallel, the first screen (105) is located above the second screen (106), the mesh number of the first screen (105) is smaller than the mesh number of the second screen (106), and the first screen (105) and the second screen (106) are arranged at an angle.

5. The pulse dust removal vibrating screen according to claim 1, characterized in that: The third impurity removal box (203) is equipped with a first drive motor (205) on one side, and the first drive motor (205) is connected to the rotating shaft (204) through a coupling.

6. The pulse dust removal vibrating screen according to claim 1, characterized in that: A guide plate (2013) is installed in the secondary processing chamber (2032). The guide plate (2013) is configured to cooperate with the dust collection plate (207). The dust collection plate (207) is connected to the second impurity removal box (202) through a second channel (208). Two opposing first baffles (209) are installed in the second impurity removal box (202). A vertical fourth channel (210) is formed between the two first baffles (209).

7. The pulse dust removal vibrating screen according to claim 1, characterized in that: The vibrating screen body (104) is fitted with a feed hopper (110) on its upper side. The vibrating screen body (104) is inclined. The first impurity removal box (201) and the second impurity removal box (202) are fitted with ash discharge augers (211) on their lower sides.

8. The pulse dust removal vibrating screen according to claim 1, characterized in that: A second baffle (2014) is installed inside the first impurity removal box (201), and the second baffle (2014) is configured to cooperate with the first channel (212). A plurality of third baffles (214) are installed inside the first impurity removal box (201), and the third baffles (214) are arranged in parallel with each other.

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