Dust filter element structure

Abstract

The utility model relates to a dust filter element structure which comprises a filter screen, the filter screen comprises at least two filter screen units, each filter screen unit is formed by rolling a sintered net, the at least two filter screen units are sequentially arranged in the axial direction, and a connecting ring made of rigid materials is fixedly connected between every two adjacent filter screen units. According to the novel filter element structure provided by the utility model, the filter screen is formed by sequentially connecting the at least two filter screen units through the connecting rings made of rigid materials, so that the overall compression strength is increased, the manufacturing process is simple, the cost is lower, and the overall weight is not obviously increased.

Description

Technical Field

[0001] This utility model relates to a dust filter structure. Background Technology

[0002] The applicant's prior patent CN202221200028.6 discloses a filter, including a vertical tank, a filter element, and a top cover. The top cover is fitted onto the upper port of the tank and has an inlet, an outlet, and a pressure gauge port. The bottom of the tank has a drain port, and the filter element is detachably installed inside the tank. Figure 1 The diagram shows the dust filter element structure used in this filter. It primarily filters through a filter screen 1', which is made of a relatively long sintered mesh formed by rolling. The filter screen 1' has an upper ring 2' and a lower ring 3' fixed at both ends. The above dust filter element structure has the following problems: when too much dust adheres to the filter screen 1' and is not cleaned in time, or when the filter element selection precision is inappropriate, the filter screen is prone to instability under high vacuum suction, resulting in collapse in the middle, affecting its strength. In severe cases, it can lead to damage to the sintered mesh, thus affecting the entire production process. Currently, there are usually two ways to solve the above problems: ① Set a metal support on the inner circumference of the filter screen 1' to support the filter screen 1', increase its pressure resistance, and prevent the filter screen 1' from collapsing. This method requires a high level of skill in rolling the filter screen 1' into a round shape, otherwise the filter screen 1' and the metal support cannot fit well together; ② Increase the thickness of the filter screen 1' to increase its pressure resistance. However, the greater the thickness of the filter screen 1', the more difficult the rolling process becomes and the higher the processing cost. In addition, the weight of the entire filter element increases significantly, which has a significant adverse impact on the subsequent replacement of the filter. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide a dust filter structure.

[0004] The technical solution adopted by this utility model is as follows: a dust filter element structure, including a filter screen, the filter screen including at least two filter screen units, the filter screen units being sintered mesh rolled into a circle, the at least two filter screen units being arranged sequentially along the axial direction and adjacent filter screen units being fixedly connected by a connecting ring made of rigid material.

[0005] The filter unit and the connecting ring are fixed by welding.

[0006] The connecting ring has a convex ring in the middle of its outer periphery, and a mating part with an outer diameter smaller than the convex ring is formed above and below the convex ring. The filter unit is sleeved on the mating part and its end face abuts against the end face of the convex ring. The inner diameter of the filter unit is adapted to the mating part so that the inner periphery of the filter unit fits the outer periphery of the mating part.

[0007] The outer diameter of the filter unit is adapted to the outer diameter of the convex ring.

[0008] The connecting ring is made of metal.

[0009] The filter screen is fixed with an upper ring and a lower ring at both ends.

[0010] The beneficial effects of this utility model are as follows: This utility model provides a new filter element structure, in which the filter screen is set up as at least two filter screen units connected in sequence by a connecting ring made of rigid material, which increases the overall pressure resistance, simplifies the manufacturing process, reduces the cost, and does not significantly increase the overall weight. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0012] Figure 1 This is a schematic diagram of the specific structure of a dust filter element in the prior art;

[0013] In the diagram, filter screen -1', upper ring -2', lower ring -3';

[0014] Figure 2 This is a schematic diagram of the structure of one embodiment of the present utility model;

[0015] Figure 3 for Figure 2 Enlarged diagram of part A in the middle;

[0016] In the figure, filter unit-1, connecting ring-2, convex ring-201, mating part-202, upper ring-3, and lower ring-4. Detailed Implementation

[0017] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0018] The directional and positional terms used in this utility model, such as up, down, front, back, left, right, inside, outside, top, bottom, side, etc., are only for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.

[0019] like Figure 2As shown, a dust filter element structure includes a filter screen, which comprises at least two filter screen units 1. Each filter screen unit 1 is a sintered mesh rolled into a circle. The at least two filter screen units 1 are arranged sequentially along the axial direction, and a connecting ring 2 is fixedly connected between adjacent filter screen units 1. The length and number of filter screen units 1 are determined according to the required filtration accuracy and overall length of the dust filter element: for dust filter elements of the same length, higher required filtration accuracy means greater required pressure resistance. Reducing the length of the filter screen units 1 and increasing their number can meet the requirement of greater pressure resistance; for dust filter elements with the same filtration accuracy, the overall length can be increased by increasing the number of filter screen units 1.

[0020] Among them, the connecting ring 2 needs to have strong pressure resistance, and it is preferred to use metal material.

[0021] The filter unit 1 and the connecting ring 2 are fixed by welding.

[0022] like Figure 3 As shown, the connecting ring 2 has a convex ring portion 201 at the center of its outer periphery, and mating portions 202 with an outer diameter smaller than the convex ring portion 201 are formed above and below the convex ring portion 201. The filter screen unit 1 is sleeved on the mating portion 202, and its end face abuts against the end face of the convex ring portion 201. The inner diameter of the filter screen unit 1 is adapted to the mating portion 202 so that the inner periphery of the filter screen unit 1 fits against the outer periphery of the mating portion 202. The convex ring portion 201 increases the welding surface area between the filter screen unit 1 and the connecting ring 2, making the connection more stable, and further forms a retaining ring between adjacent filter screen units 1 to ensure the positional stability of adjacent filter screen units 1.

[0023] The outer diameter of the filter unit 1 is adapted to the outer diameter of the convex ring 201. This ensures that the outer circumferential surface of the filter element is uniform, reducing material accumulation on the outer circumferential surface of the filter element.

[0024] The filter screen is fixed at both ends with an upper ring 3 and a lower ring 4.

[0025] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A dust filter element structure, comprising a filter screen, characterized in that: The filter screen includes at least two filter screen units (1), each filter screen unit (1) is a sintered mesh rolled into a circle, and at least two filter screen units (1) are arranged sequentially along the axial direction and a connecting ring (2) is fixedly connected between adjacent filter screen units (1).

2. The dust filter element structure according to claim 1, characterized in that: The filter unit (1) and the connecting ring (2) are fixed by welding.

3. The dust filter element structure according to claim 2, characterized in that: The connecting ring (2) has a convex ring (201) in the middle of its outer periphery and a mating part (202) with an outer diameter smaller than that of the convex ring (201) is formed above and below the convex ring (201). The filter unit (1) is sleeved on the mating part (202) and its end face abuts against the end face of the convex ring (201). The inner diameter of the filter unit (1) is adapted to the mating part (202) so that the inner periphery of the filter unit (1) fits against the outer periphery of the mating part (202).

4. The dust filter element structure according to claim 3, characterized in that: The outer diameter of the filter unit (1) is adapted to the outer diameter of the convex ring (201).

5. The dust filter element structure according to any one of claims 1-4, characterized in that: The connecting ring (2) is made of metal.

6. The dust filter element structure according to claim 1, characterized in that: The filter screen is fixed with an upper ring (3) and a lower ring (4) at both ends.

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