Graded filtering device

Abstract

The utility model relates to a graded filtering device which comprises a box body which is of a hollow structure and comprises an air inlet arranged at the front end of the box body; the air outlet is formed in the rear end of the box body; the at least two sockets are formed in the side surface of the box body at intervals; the filter element assembly is mounted in the box body through the insertion opening and is provided with a core part; wherein the aperture of the core part far away from the air inlet is smaller than that of the core part close to the air inlet. Gas mixed with dust is introduced into the gas inlet, the filter element assembly with the large hole diameter filters large particles in the dust and enables the gas and the dust with the small particles to penetrate through, the filter element assembly with the small hole diameter filters the small particles in the dust again, the filtered gas is discharged through the gas outlet, the structure is simple, use is convenient, and the practicability is high. And dust containing coarse particles and fine particles at the same time can be filtered in a classified manner.

Description

Technical Field

[0001] The utility model relates to the technical field of dust filtering equipment, in particular to a grading filtering device. Background Art

[0002] A dust filtering device generally includes a box body which has an air inlet and an air outlet, and only one filter plate is inserted into the box body. When the dust carried by the gas contains both coarser particles and finer particles at the same time, if the core of the filter plate has a larger pore diameter, the finer particles cannot be filtered. If the core of the filter plate has a smaller pore diameter, the coarser particles are likely to block the core holes, affecting the filtering effect of the finer particles.

[0003] It should be noted that the information disclosed in the above background art section is only used to enhance the understanding of the background of the present disclosure, and thus may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Utility Model

[0004] In view of the deficiencies of the prior art, the embodiments of the present utility model disclose a grading filtering device to solve the problem of poor separation effect of a dust filtering device for filtering dust containing both coarser particles and finer particles.

[0005] The technical solution adopted by the present utility model is as follows:

[0006] A grading filtering device, the grading filtering device includes: a box body, which is a hollow structure and includes: an air inlet provided at the front end of the box body; an air outlet provided at the rear end of the box body; at least two sockets spacedly opened on the side surface of the box body; a filter element assembly installed in the box body through the sockets and having a core part; wherein, the pore diameter of the core part on the side away from the air inlet is smaller than the pore diameter of the core part on the side close to the air inlet.

[0007] A further technical solution thereof is that the filter element assembly includes: a frame body, which is a hollow structure and is arranged around the outside of the core part; the box body includes: baffles connected inside the box body and corresponding to the front end and the rear end of the frame body in position.

[0008] A further technical solution thereof is that the filter element assembly includes: a sealing strip attached to the periphery of the frame body on the side close to the air inlet.

[0009] A further technical solution thereof is that the grading filtering device includes a pressing mechanism, and the pressing mechanism includes: a shaft body rotatably arranged inside the box body; two eccentric wheels fixed at both ends of the shaft body; a pressing plate slidably arranged inside the box body, and the rear end of the pressing plate covers the outside of the eccentric wheel; wherein, when the shaft body is rotated, the shaft body drives the eccentric wheels to rotate eccentrically, and the eccentric wheels drive the pressing plate to slide forward or backward, so that the pressing plate presses or loosens the filter element assembly.

[0010] A further technical solution thereof is that the pressing mechanism includes: elastic members, there are four of them, the front ends are connected to the four corners of the rear end of the pressing plate, and the rear ends are connected to the inner wall of the box body.

[0011] A further technical solution thereof is that the pressing mechanism includes: a handle, which is connected to the shaft body and is located on the side of the box body.

[0012] A further technical solution thereof is that the grading and filtering device includes: a sealing plate, which is detachably installed on the side of the box body to close the socket.

[0013] A further technical solution thereof is that the box body includes: positioning columns, which are arranged on the side of the box body and correspond to both sides of the socket; the sealing plate includes: ears, which are arranged on both sides of the sealing plate and correspond to the positioning columns, and the positioning columns extend into the ears; screws, which pass through the ears and are threadedly connected to the positioning columns.

[0014] A further technical solution thereof is that the box body includes: support feet, which are arranged at the front end and the rear end of the bottom of the box body.

[0015] The beneficial effects of the embodiments of the present utility model are as follows:

[0016] (1) The grading and filtering device of the present utility model includes a box body and a filter element assembly. By inserting at least two filter element assemblies into the box body, the core pore diameter of the filter element assembly closer to the air inlet is larger, and the core pore diameter of the filter element assembly farther from the air inlet is smaller. The air inlet passes through the gas mixed with dust. The filter element assembly with a larger pore diameter filters the larger particles in the dust and allows the gas and the smaller particle dust to pass through. The filter element assembly with a smaller pore diameter further filters the smaller particles in the dust. The filtered gas is discharged through the air outlet. The structure is simple and easy to use, realizing the grading filtration of dust containing both coarser particles and finer particles.

[0017] (2) Further, the grading and filtering device includes a pressing mechanism, and the pressing mechanism includes a shaft body, an eccentric wheel and a pressing plate. Rotate the shaft body, the shaft body drives the eccentric wheel to rotate eccentrically, and the eccentric wheel drives the pressing plate to slide forward or backward, so that the pressing plate presses or loosens the frame of the filter element assembly. After pressing, the sealing performance between the frame and the baffle is good, preventing dust from leaking from the gap between the frame and the baffle, and ensuring the dust filtering effect. Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of the grading and filtering device of the present utility model.

[0019] Figure 2 It is a sectional view of the grading and filtering device of the present utility model.

[0020] Figure 3 is Figure 2 an enlarged view at A.

[0021] Figure 4 is Figure 2 an enlarged view at B.

[0022] In the figure:

[0023] 1. Box body; 11. Air inlet; 12. Air outlet; 13. Socket; 14. Positioning column; 15. Baffle; 16. Support leg; 2. Filter element assembly; 21. Frame body; 22. Core part; 23. Sealing strip; 3. Sealing plate; 31. Ear part; 32. Screw; 4. Pressing mechanism; 41. Shaft body; 411. Handle; 42. Eccentric wheel; 43. Pressing plate; 431. Cover part; 432. Plate part. Specific embodiments

[0024] The following combines with the drawings to illustrate the specific embodiments of the present invention.

[0025] In order to make the purpose, technical solutions and advantages of the present invention clearer and more understandable, the following further elaborates on the device proposed by the present invention in combination with the drawings and specific embodiments. According to the following description, the advantages and features of the present invention will be clearer. It should be noted that the drawings are in a very simplified form and use non-precise scales, only for conveniently and clearly assisting in explaining the purpose of the embodiments of the present invention. In order to make the purpose, features and advantages of the present invention more obvious and understandable, please refer to the drawings. It should be noted that the structures, scales, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention. Therefore, they do not have technical essence. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed by the present invention.

[0026] First embodiment:

[0027] This embodiment discloses a hierarchical filtration device.

[0028] The hierarchical filtration device includes a box body 1 and a filter element assembly 2.

[0029] The box body 1 is a hollow structure, including an air inlet 11, an air outlet 12 and a socket 13. The air inlet 11 is arranged at the front end of the box body 1, and the air outlet 12 is arranged at the rear end of the box body 1. There are two sockets 13, which are horizontally and spaced apart and opened on the side surface of the box body 1. The socket 13 is square.

[0030] The filter element assembly 2 is installed in the box body 1 via the socket 13. The filter element assembly 2 includes a frame body 21 and a core part 22. The frame body 21 is of a hollow structure and is arranged around the outer side of the core part 22. Among them, the aperture of the core part 22 on the side far from the air inlet 11 is smaller than the aperture of the core part 22 on the side close to the air inlet 11. The box body 1 includes a baffle 15, and the baffle 15 is connected inside the box body 1 and is positioned corresponding to the front end and the rear end of the frame body 21. The baffle 15 and the box body 1 together enclose a chute for accommodating the filter element assembly 2. The baffle 15 does not extend to the core part 22 to ensure the flow rate of the grading filtration device.

[0031] Furthermore, the filter element assembly 2 includes a sealing strip 23, and the sealing strip 23 is attached to the periphery of the frame body 21 on the side close to the air inlet 11. The sealing performance between the front end of the frame and the baffle 15 is improved, preventing dust from leaking from the gap between the frame and the baffle 15 and ensuring the dust separation effect.

[0032] Furthermore, the grading filtration device includes a sealing plate 3. The sealing plate 3 is detachably installed on the side of the box body 1, and the sealing plate 3 closes the socket 13. Exemplarily, the box body 1 includes positioning posts 14. The positioning posts 14 are arranged on the side of the box body 1 and are positioned corresponding to both sides of the socket 13. The sealing plate 3 includes ear parts 31 and screws 32. The ear parts 31 are semi-frame-shaped and are arranged on both sides of the sealing plate 3 and are positioned corresponding to the positioning posts 14. The positioning posts 14 extend into the ear parts 31 to position the sealing plate 3. The screws 32 pass through the ear parts 31 and are threadedly connected to the positioning posts 14. After being tightened, the screws 32 press against the ear parts 31 to fix the sealing plate 3 to the side of the box body 1.

[0033] Furthermore, the box body 1 includes support feet 16, and the support feet 16 are arranged at the front end and the rear end of the bottom of the box body 1.

[0034] In this embodiment, by inserting at least two filter element assemblies 2 into the box body 1, the aperture of the core body 22 of the filter element assembly 2 closer to the air inlet 11 is larger, and the aperture of the core body 22 of the filter element assembly 2 farther from the air inlet 11 is smaller. The air inlet 11 introduces the gas mixed with dust. The filter element assembly 2 with a larger aperture filters the larger particles in the dust and allows the gas and the smaller particle dust to pass through. The filter element assembly 2 with a smaller aperture filters the smaller particles in the dust again. The filtered gas is discharged through the air outlet 12. The structure is simple and convenient to use, realizing the grading filtration of dust containing both coarser particles and finer particles.

[0035] Second Embodiment:

[0036] Based on the first embodiment, the second embodiment is further optimized and refined.

[0037] The grading and filtering device includes a pressing mechanism 4, and the pressing mechanism 4 includes a shaft body 41, an eccentric wheel 42 and a pressing plate 43. The shaft body 41 is rotatably arranged in the box body 1. There are two eccentric wheels 42, which are fixed at both ends of the shaft body 41. The pressing plate 43 is slidably arranged in the box body 1, and the rear end covers the outside of the eccentric wheel 42. Exemplarily, the pressing plate 43 includes a covering portion 431 covering the outside of the eccentric wheel 42 and a plate portion 432 connected to the front end of the covering portion 431. The covering portion is a semi-frame-shaped sheet metal, the shaft body 41 passes through the two covering portions 431, the plate portion is a right-angled sheet metal, and while the plate portion 432 propping up the frame body 21 of the filter element assembly 2, it restricts the inward movement of the filter element assembly 2. Preferably, the pressing mechanism 4 includes a handle 411, the handle 411 is connected to the shaft body 41, is located on the side of the box body 1, and drives the shaft body 41 to rotate by rotating the handle 411, which is convenient for use.

[0038] Furthermore, the pressing mechanism 4 includes elastic members. There are four elastic members. The front ends are connected to the four corners of the rear end of the pressing plate 43, and the rear ends are connected to the inner wall of the box body 1. The elastic members ensure that when the pressing plate 43 is retracted, the pressing plate 43 can maintain a vertical state under the support of the elastic force, which is convenient for the pressing plate 43 to slide in the box body 1.

[0039] In this embodiment, the shaft body 41 is rotated, the shaft body 41 drives the eccentric wheel 42 to rotate eccentrically, the eccentric wheel 42 drives the pressing plate 43 to slide forward or backward, so that the pressing plate 43 presses or loosens the frame body 21 of the filter element assembly 2. After pressing, the sealing performance between the frame body 21 and the baffle 15 is good, preventing dust from leaking from the gap between the frame body 21 and the baffle 15, and ensuring the filtering effect of the dust.

[0040] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0041] The above-described embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A grading filtration device, characterized in that, The grading and filtering device includes: A box body, which is a hollow structure and includes: An air inlet, which is arranged at the front end of the box body; An air outlet, which is arranged at the rear end of the box body; Sockets, with at least two, spacedly arranged on the side surface of the box body; A filter element assembly, which is installed in the box body through the sockets and has a core part; Wherein, the aperture of the core part on the side far from the air inlet is smaller than the aperture of the core part on the side close to the air inlet.

2. The hierarchical filtration device according to claim 1, characterized in that, The filter element assembly includes: A frame body, which is a hollow structure and is arranged around the outside of the core part; The box body includes: Baffles, which are connected inside the box body and are positioned corresponding to the front end and the rear end of the frame body.

3. The hierarchical filtration device according to claim 2, characterized in that, The filter element assembly includes: Sealing strips, which are pasted around the side of the frame body close to the air inlet.

4. The hierarchical filtration device according to claim 1, characterized in that, The grading and filtering device includes a pressing mechanism, and the pressing mechanism includes: A shaft body, which is rotatably arranged inside the box body; Two eccentric wheels, which are fixed at both ends of the shaft body; A pressing plate, which is slidably arranged inside the box body, and the rear end covers the outside of the eccentric wheels; Wherein, by rotating the shaft body, the shaft body drives the eccentric wheels to rotate eccentrically, and the eccentric wheels drive the pressing plate to slide forward or backward, so that the pressing plate presses or loosens the filter element assembly.

5. The hierarchical filtration device according to claim 4, wherein, The pressing mechanism includes: Four elastic members, with the front ends connected to the four corners of the rear end of the pressing plate and the rear ends connected to the inner wall of the box body.

6. The grading filtration device according to claim 4, characterized in that, The pressing mechanism includes: A handle, which is connected to the shaft body and is located on the side surface of the box body.

7. The hierarchical filtration device according to claim 1, wherein The grading and filtering device includes: a sealing plate, which is detachably installed on the side surface of the box body to close the sockets.

8. The hierarchical filtration device according to claim 7, characterized in that, The box body includes: Positioning columns, which are arranged on the side surface of the box body and are positioned corresponding to both sides of the sockets; The sealing plate includes: Ears, which are arranged on both sides of the sealing plate and are positioned corresponding to the positioning columns, and the positioning columns extend into the ears; Screws, which pass through the ears and are threadedly connected to the positioning columns.

9. The grading filtration device according to claim 1, characterized in that, The box body includes: Support feet, which are arranged at the front end and the rear end of the bottom of the box body.

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