Screening filter screen of pulverizer

Abstract

The material screening filter screen comprises a screen frame, a first mesh screen and a second mesh screen, the screen frame is fixedly connected with a discharging port of the pulverizer, a feeding port and a discharging port are formed in the two end faces of the screen frame respectively, the first mesh screen is connected with the feeding port in a sliding mode, the second mesh screen is detachably connected with the discharging port, and a hinged side door is arranged on one side of the screen frame. The middle of the second mesh screen is arched, and the arched face of the second mesh screen is far away from the discharging opening. And through double filtration of the first mesh screen and the second mesh screen, it is guaranteed that the material screening filter screen is not prone to being blocked by material fragments, and the screening effect of the material screening filter screen is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of pulverizing equipment, in particular to a screening filter of a pulverizer. Background Art

[0002] A pulverizer is a specialized machine that crushes large solid materials into required sizes. In order to separate particles of different sizes, it is usually necessary to screen the fragments through a screen. The existing screen includes a straight cylindrical container with a screen fixed on the inner wall. The fragments are poured from the upper end of the cylindrical container. After screening, the fragments fall along the cylindrical container, and the coarse debris remains on the screen. In the actual production process, due to the limited screening area of ​​the screen, coarse particles are prone to stay on the screen and block the screen holes, affecting the screening effect of the screen. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a screening filter for a pulverizer.

[0004] The technical solution of the utility model is: a screening filter for a pulverizer, comprising a screen frame, a first mesh screen and a second mesh screen, the screen frame is fixedly connected to a material discharge port of the pulverizer, two end surfaces of the screen frame are respectively provided with a feed port and a discharge port, the first mesh screen is slidably connected to the feed port, the second mesh screen is detachably connected to the discharge port, a hinged side door is provided on one side of the screen frame, the middle part of the second mesh screen is arched, and the arched side of the second mesh screen is away from the discharge port.

[0005] Furthermore, the end surface of the screen frame close to the feed inlet is provided with symmetrically distributed lugs, each of which is provided with a positioning hole, and a first bolt is provided in the positioning hole, and the screen frame is fixedly connected to the crusher through the first bolt.

[0006] Furthermore, an opening is provided on one side of the screen frame, and the inner wall of the vertical opening of the screen frame is provided with a sliding groove matching the first mesh screen.

[0007] Furthermore, the top surface of the chute is provided with a slope, and the top surface of the slope is flush with the top surface of the screen frame.

[0008] Furthermore, the outer walls of the screen frame are provided with first reinforcing ribs.

[0009] Furthermore, the side door is connected to the screen frame via a hinge, and the hinge is provided with a torsion spring.

[0010] Furthermore, a lock is provided on one side of the screen frame where the side door is provided. The lock is rotatably connected to the screen frame via a rotating shaft, and the lock can fit with the end face of the first mesh screen and the side door.

[0011] Furthermore, the bottom surface of the second mesh screen is provided with an outer edge, and the circumference of the outer edge is provided with through holes with uniform intervals, and second bolts are provided in the through holes, and the second mesh screen is connected to the screen frame through the second bolts.

[0012] Furthermore, a plurality of second reinforcing ribs are evenly spaced in the circumferential direction of the inner wall of the second mesh screen.

[0013] Compared with the prior art, the utility model has the advantages that the first mesh screen is used to prevent oversized fragments from contacting the second mesh screen, thereby protecting the second mesh screen. When smaller fragments pass through the first mesh screen, they contact the second mesh screen. The second mesh screen is arched and has an enlarged screen surface. The fragments fully contact the second mesh screen, and the particles that meet the standards are discharged from the discharge port. The fragments that do not meet the standards fall to the bottom surface of the second mesh screen, which does not affect the subsequent fragments from continuing to be screened. After the fragments that do not meet the standards are discharged through the side door, they are poured back into the crusher. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is an overall schematic diagram of the utility model;

[0016] Figure 2 It is a cross-sectional schematic diagram of the utility model;

[0017] Figure 3 It is a schematic diagram of the second mesh screen of the utility model.

[0018] Among them: 1. screen frame; 2. first mesh screen; 3. second mesh screen; 11. side door; 12. lock; 13. lug; 14. slope; 15. first reinforcing rib; 16. slide; 17. feed port; 18. discharge port; 31. second reinforcing rib; 32. outer edge. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.

[0020] The specific implementation of the utility model will be described below in conjunction with the accompanying drawings:

[0021] like Figures 1 to 3As shown, a screening filter for a pulverizer includes a sieve frame 1, a first mesh screen 2, and a second mesh screen 3. The sieve frame 1 is fixedly connected to the discharge port of the pulverizer, and the two end surfaces of the sieve frame 1 are respectively provided with a feed port 17 and a discharge port 18. A hinged side door 11 is provided on one side of the sieve frame 1, and the side door 11 is connected to the sieve frame 1 through a hinge, and the hinge is provided with a torsion spring. The torsion spring can keep the side door 11 in a closed state. A handle is provided on the side door 11 to facilitate opening the side door 11. A lock buckle 12 is provided on the side of the sieve frame 1 provided with the side door 11, and the lock buckle 12 is rotatably connected to the sieve frame 1 through a rotating shaft. By controlling the rotation angle of the lock buckle 12, the lock buckle 12 can be simultaneously fitted with the first mesh screen 2 and the side door 11 to lock the first mesh screen 2 and the side door 11; changing the rotation angle of the lock buckle 12 can unlock the first mesh screen 2 or the side door 11. The middle part of the second mesh screen 3 is arched, and the arched side of the second mesh screen 3 is away from the discharge port 18. The first mesh screen 2 is used to block the oversized fragments to prevent the oversized fragments from blocking or damaging the second mesh screen 3. The second mesh screen 3 is arched, which increases the screening area, and the fragments are fully in contact with the second mesh screen 3. The larger fragments fall to the bottom of the second mesh screen 3 and are not easy to block the second mesh screen 3. The end surface of the screen frame 1 close to the feed port 17 is provided with symmetrically distributed lugs 13, and the lugs 13 are provided with positioning holes, and the positioning holes are provided with first bolts. The screen frame 1 is fixedly connected to the crusher through the first bolt. One side of the screen frame 1 is provided with an opening, and the inner wall of the vertical opening of the screen frame 1 is provided with a chute 16 that matches the first mesh screen 2. The first mesh screen 2 is in contact with larger pieces of debris and is easy to wear. This detachable connection method facilitates the disassembly, assembly and replacement of the first mesh screen 2. The top surface of the chute 16 is provided with a slope 14, and the top surface of the slope 14 is flush with the top surface of the screen frame 1. The slope 14 can prevent debris from remaining on the chute 16, and play a certain protective role on the chute 16. The bottom surface of the second mesh screen 3 is provided with an outer edge 32, and the outer edge 32 is provided with evenly spaced through holes in the circumference, and a second bolt is provided in the through hole, and the second mesh screen 3 is connected to the screen frame 1 through the second bolt. The detachable second mesh screen 3 is convenient for maintenance and replacement. The inner wall of the second mesh screen 3 is provided with a plurality of evenly spaced second reinforcing ribs 31 in the circumference, and the second reinforcing ribs 31 can increase the strength of the second mesh screen 3, prevent the second mesh screen 3 from deforming prematurely, extend the service life of the second mesh screen 3, and ensure the use effect of the second mesh screen 3. The outer wall of the screen frame 1 is provided with a first reinforcing rib 15, and the first reinforcing rib 15 can improve the deformation resistance of the outer wall of the screen frame 1 without increasing the thickness of the outer wall too much.

[0022] The working principle of the specific implementation of the utility model is as follows: the screen frame 1 is fixedly connected to the discharge port of the crusher through the cooperation of the lug 13 and the first positioning bolt. The larger pieces of material fragments are blocked by the first mesh screen 2 and cannot pass through the discharge port, and continue to be crushed in the crusher. The smaller pieces of fragments contact the second mesh screen 3, and from the arch to the bottom of the second mesh screen 3, they fully contact and sieve the second mesh screen 3. The fragments that meet the standards pass through the second mesh screen 32 and are discharged from the discharge port 18, and the fragments that do not meet the standards are retained in the screen frame 1. Open the side door 11, and the fragments that have not been screened are poured out and poured into the crusher for further crushing.

[0023] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an element centered thereon. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an element centered thereon. The terms "upper", "lower", "left", "right", "front", "rear" and similar expressions used herein are for illustrative purposes only.

[0024] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A screening filter for a pulverizer, characterized in that: The invention comprises a screen frame (1), a first mesh screen (2) and a second mesh screen (3); the screen frame (1) is fixedly connected to the discharge port of the pulverizer; the two end surfaces of the screen frame (1) are respectively provided with an inlet (17) and a discharge port (18); the first mesh screen (2) is slidably connected to the inlet (17); the second mesh screen (3) is detachably connected to the discharge port (18); a hinged side door (11) is provided on one side of the screen frame (1); the middle part of the second mesh screen (3) is arched, and the arched side of the second mesh screen (3) is away from the discharge port (18).

2. The screening filter of the pulverizer according to claim 1, characterized in that: The end surface of the screen frame (1) close to the feed port (17) is provided with symmetrically distributed lugs (13), each of which is provided with a positioning hole, and a first bolt is provided in the positioning hole, and the screen frame (1) is fixedly connected to the crusher via the first bolt.

3. The screening filter of the pulverizer according to claim 1, characterized in that: One side of the screen frame (1) is provided with an opening, and the inner wall of the screen frame (1) perpendicular to the opening is provided with a sliding groove (16) that matches the first mesh screen (2).

4. The screening filter of the pulverizer according to claim 3, characterized in that: The top surface of the chute (16) is provided with a slope (14), and the top surface of the slope (14) is flush with the top surface of the screen frame (1).

5. The screening filter of the pulverizer according to claim 1, characterized in that: The outer wall of the screen frame (1) is provided with a first reinforcing rib (15).

6. The screening filter of the pulverizer according to claim 1, characterized in that: The side door (11) is connected to the screen frame (1) via a hinge, and the hinge is provided with a torsion spring.

7. The screening filter of the pulverizer according to claim 1, characterized in that: The screen frame (1) is provided with a lock buckle (12) on one side of the side door (11), and the lock buckle (12) is rotatably connected to the screen frame (1) via a rotating shaft. The lock buckle (12) fits with the end surface of the first mesh screen (2) and the side door (11).

8. The screening filter of the pulverizer according to claim 1, characterized in that: The bottom surface of the second mesh screen (3) is provided with an outer edge (32), and the outer edge (32) is provided with through holes at even intervals in the circumferential direction. Second bolts are provided in the through holes, and the second mesh screen (3) is connected to the screen frame (1) via the second bolts.

9. The screening filter of the pulverizer according to claim 1, characterized in that: The inner wall of the second mesh screen (3) is provided with a plurality of second reinforcing ribs (31) at even intervals in the circumferential direction.

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