Detachable screen frame for screen sedimentation centrifuge

Abstract

The utility model discloses a detachable screen frame for a screen sedimentation centrifuge, which belongs to the technical field of mineral separation and centrifugation and comprises a screen frame body and screen bars which are adhered and fixed through inclined surfaces of adhesive layers. The problems that in the prior art, due to the fact that the screen frame body is exposed out of the abrasion face and is not resistant to abrasion, the screen frame is scrapped in advance, and due to the fact that the screen frame body cannot restrain the screen bars, the screen frame is scrapped in advance are solved.

Description

Technical Field

[0001] This utility model belongs to the field of mineral sorting and centrifugation technology, specifically relating to a detachable screen frame for a screen sedimentation centrifuge. Background Technology

[0002] Centrifuge screen frames are widely used in industries such as coal, chemical, and metallurgy, primarily for dewatering or grading operations. For example, in the coal industry, screen frames are used to separate solids and liquids in coal slurry, improving the dryness and purity of the coal. The main purpose of centrifuge screen frames is to support and fix the centrifuge screen, ensuring its stability during centrifuge operation and achieving solid-liquid separation.

[0003] Screen frames are typically composed of a screen frame body and screen bars, such as... Figure 1a and Figure 1b As shown, there are two types of traditional screen bar adhesive type screen frames: one is a screen bar adhesive type screen frame with an outer frame (…). Figure 1a One type is a frameless, strip-attached screen frame. Figure 1b The screen frame consists of a screen frame body and screen bars. The screen frame body and screen bars are fixed together by adhesive bonding.

[0004] The pasting method for screen bars with outer frame is as follows: Figure 2a and Figure 2b As shown, the screen bars are attached to the inside of the screen frame. This is because the screen frame is made of a non-wear-resistant material, while the screen bars are made of a wear-resistant material. After running for a period of time (such as...), Figure 2b As shown in the figure, the wear and tear amounts of the two are inconsistent. This can cause the screen bars to fall off due to insufficient adhesion area.

[0005] Frameless grid-patterned screen frame, such as... Figure 3a and Figure 3b As shown, the screen bars are pasted on the upper part of the screen frame, which solves the problem of the screen frame not being wear-resistant.

[0006] However, because the screen frame cannot provide limit constraints on the screen bars, after a period of operation (such as...), Figure 3b As shown in the figure, a large number of screen bars fell off. Summary of the Invention

[0007] Based on the technical problems existing in the prior art, this utility model provides a detachable screen frame for a screen sedimentation centrifuge, which solves the problems in the prior art where the screen frame is exposed on the wear surface and the screen frame itself is not wear-resistant, resulting in premature scrapping of the screen frame, and the screen frame cannot restrain the screen bars, ultimately leading to premature scrapping of the screen frame.

[0008] According to the technical solution of this utility model, this utility model provides a detachable screen frame for a screen sedimentation centrifuge, which includes a screen frame body and screen bars, and the screen frame body and screen bars are bonded and fixed together by an adhesive layer. Further, the screen frame body is a metal frame product, used to provide the bonding surface for the screen bars, and also used to fix the screen frame to the centrifuge.

[0009] Preferably, the screen bars are wear-resistant components that provide the screen openings, and the screen bars also serve as water-permeable components of the centrifuge. The screen frame and screen bars are bonded together using an inclined bonding method.

[0010] More preferably, one end of the screen frame is a sloped surface, and an adhesive layer is applied to the sloped surface at one end of the screen frame. The other end of the screen bar is also a sloped surface, and an adhesive layer is applied to the sloped surface at one end of the screen bar.

[0011] Furthermore, the inclined surface and the main body of the screen frame form an angle α, where α is any angle between 35° and 80°. Furthermore, the inclined surface and the main body of the screen bars form an angle β, where β is any angle between 15° and 50°.

[0012] Preferably, the angle α between the inclined surface and the screen frame is any angle between 45° and 65°, or the angle β between the inclined surface and the screen bars is any angle between 20° and 25°.

[0013] Furthermore, the sum of the included angles α and β is 90°.

[0014] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0015] 1. All wear surfaces are made of wear-resistant screen bars, and the non-wear-resistant screen frame does not come into contact with the material, truly achieving a frameless screen frame, which can extend the service life of the screen frame;

[0016] 2. The four sides of the screen frame constrain the screen bars, limiting the force exerted on the screen bars during operation and extending the service life of the screen frame. Attached Figure Description

[0017] Figure 1a and Figure 1b This is a schematic diagram of the traditional screen bar pasting method in existing technology. Figure 1a It is a screen bar adhesive type with an outer frame. Figure 1b It is a borderless grid strip pasting type.

[0018] Figure 2a and Figure 2b This is a schematic diagram of an existing technology for attaching screen bars with an outer frame. Figure 2a It is a new type of screen frame with attached screen bars and an outer frame. Figure 2bIt is a worn-out screen frame with adhesive screen bars and an outer frame.

[0019] Figure 3a and Figure 3b This is a schematic diagram of an existing borderless grid strip pasting method. Figure 3a It is a new type of screen frame with frameless, adhesive-mounted grating. Figure 3b It is a frameless, grid-patterned screen frame that has been in operation for a period of time.

[0020] Figure 4a and Figure 4b This is a structural diagram of the detachable screen frame for a screen sedimentation centrifuge, which is based on this utility model. Figure 4a and Figure 4b Different shaped screen frames are used, but the pasting method is the same.

[0021] Figure 5 This is a schematic diagram of a detachable screen frame for a screen sedimentation centrifuge according to this utility model.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Screen frame; 2. Screen bars. Detailed Implementation

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

[0025] It should also be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings. Unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0026] It should be noted that the concepts of "first" and "second" mentioned in this utility model are only used to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units or their interdependencies.

[0027] It should be noted that the terms "a" and "a plurality of" used in this utility model are illustrative rather than restrictive. Those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0028] This utility model discloses a detachable screen frame for a screen sedimentation centrifuge, belonging to the field of mineral sorting and centrifugation technology. It includes a screen frame body and screen bars, which are bonded and fixed together by an adhesive layer with an inclined surface. This utility model solves the problems in the prior art where the screen frame body is exposed to wear and tear and is not wear-resistant, leading to premature screen frame failure, and where the screen frame body cannot effectively restrain the screen bars, also resulting in premature screen frame failure.

[0029] like Figure 4a , Figure 4b and Figure 5 As shown, this utility model provides a detachable screen frame for a screen sedimentation centrifuge, which includes a screen frame 1 and screen bars 2, and the screen frame 1 and screen bars 2 are fixed together by adhesive bonding.

[0030] The screen frame 1 is a metal frame product used to provide the bonding surface for the screen bars 2 and to fix the screen frame to the centrifuge. The screen frame is used for dehydration in the centrifuge, that is, the filtrate smaller than the gaps of the screen bars 2 is thrown out under the centrifugal force of the centrifuge.

[0031] Figure 4a and Figure 4b These are two different shaped screen parts, but the structure of the screen frame is the same, consisting of a screen frame body and screen bars. Figure 4a It is a rectangular screen frame, with the frame body being rectangular and the shape of the screen bars matching the frame body. Figure 4b It is a parallelogram-shaped screen frame, with a rectangular frame and screen bars that match the shape of the frame.

[0032] In the above Figure 4a and Figure 4b In this centrifuge, the screen frame 1 and the screen bars 2 are fixed together by adhesive bonding. The screen bars 2 are wear-resistant components that provide the screen openings and serve as water-permeable components for the centrifuge. In another preferred embodiment, the screen bars 2 are made of a metal frame or ribs coated with a wear-resistant coating. The screen frame 1 is a non-wear-resistant metal frame product used to provide the bonding surface for the screen bars 2 and to fix the screen frame to the centrifuge. The screen frame is used for dehydration in the centrifuge, that is, the filtrate smaller than the openings of the screen bars 2 is thrown out under the centrifugal force of the centrifuge. The screen bars 2 are made of wear-resistant materials. In a preferred embodiment, the wear-resistant materials of the screen bars 2 include ceramics, silicon carbide, tungsten carbide, and high-chromium alloys, etc.

[0033] like Figure 5As shown, the screen frame 1 and screen bars 2 are glued together using an inclined surface. One end of the screen frame 1 is used as a slope, and an adhesive layer is applied to this slope. The slope and the main body of the screen frame 1 form an angle α, where α is any angle between 35° and 80°. Specifically, the outer side of the slope is higher than the inner side, and the slope from the outer high point to the inner low point forms an angle between 40° and 70° with the vertical plane of the screen frame 1. In a preferred embodiment, the angle α between the slope and the screen frame 1 is any angle between 45° and 65°. In another preferred embodiment, the angle α between the slope and the screen frame 1 is 60°, 70°, 68°, or 66°.

[0034] One end of the sieve bar 2 is used as a slope, and an adhesive layer is applied to this slope. The slope and the main body of the sieve bar 2 form an angle β, where β is any angle between 15° and 50°. Specifically, the outer side of the slope is higher than the inner side, and the slope between the outer high point and the inner low point forms an angle between 15° and 45° with the horizontal cross-section of the sieve bar 2. In a preferred embodiment, the angle β between the slope and the sieve bar 2 is any angle between 20° and 25°. In another preferred embodiment, the angle β is 22°, 24°, 30°, or 20°.

[0035] The sieve frame 1 with its sloping surface and the sieve bars 2 with their sloping surfaces are perpendicular to each other, with an included angle α + β = 90°. That is, when the main body of the sieve frame 1 is in the vertical direction, the main body of the sieve bars 2 that intersect with the sieve frame 1 is in the horizontal direction.

[0036] A special adhesive layer is applied to the sloping surface of the screen frame. After application, a strip-laying tool is used to evenly lay the screen strips on the screen frame, thereby fixing and constraining the screen strips. This method ensures uniform stress on the screen frame and tight contact between the screen frame and the screen strips, preventing material leakage and slippage. The main components of the adhesive layer include conventional adhesives such as acrylic esters and epoxy resins, for example, Sante ST-425B heat-curing silicone rubber or metal adhesives. In another preferred embodiment, the adhesive layer uses epoxy adhesive, acrylic adhesive, etc.; wherein the epoxy adhesive has strong adhesion and durability, and a commercially available Blue Peak polyethylene alcohol adhesive preservative-adhesive preservative-adhesive mildew inhibitor is added to the adhesive layer.

[0037] In a preferred embodiment, the diameter of the sieve bar 2 is smaller than the diameter of the sieve frame 1.

[0038] Compared with existing technologies 1 and 2, this utility model has the following advantages: for the right-angle bonding of existing technology 1, the inclined bonding of this utility model can prevent the non-wear-resistant screen frame 1 from contacting the material, thus preventing wear on the screen frame and extending the service life of the screen frame; for the unrestrained bonding of existing technology 2, the inclined bonding of this utility model can provide a limiting constraint on the screen bars, preventing a large number of screen bars from falling off during operation.

[0039] In summary, this utility model solves the problems of premature scrapping of the screen frame caused by the screen frame 1 being exposed to wear and tear and the screen frame 1 itself being not wear-resistant, and the screen frame caused by the inability of the screen frame 1 to constrain the screen bars 2.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A detachable screen frame for a screen sedimentation centrifuge, characterized in that, It includes a screen frame (1) and screen bars (2), and the screen frame (1) and screen bars (2) are bonded and fixed together by an adhesive layer; the screen frame (1) and screen bars (2) are bonded by an inclined surface; one end of the screen frame (1) is a contact surface as a slope surface, and an adhesive layer is applied to the slope surface at one end of the screen frame (1).

2. The detachable screen frame for a screen sedimentation centrifuge according to claim 1, characterized in that, The screen frame (1) is a metal frame product used to provide the adhesive surface for the screen bars (2) and to fix the screen frame to the centrifuge.

3. The detachable screen frame for a screen sedimentation centrifuge according to claim 1, characterized in that, The screen bar (2) is a wear-resistant part that provides the screen opening, and the screen bar (2) serves as a water-permeable part of the centrifuge.

4. The detachable screen frame for a screen sedimentation centrifuge according to claim 1, characterized in that, One end of the screen bar is used as a slope, and an adhesive layer is applied to the slope at one end of the screen bar.

5. The detachable screen frame for a screen sedimentation centrifuge according to claim 3, characterized in that, The angle between the sloping surface and the main body of the screen frame is α, where α is any angle between 35° and 80°.

6. The detachable screen frame for a screen sedimentation centrifuge according to claim 5, characterized in that, The inclined surface and the main body of the screen bar form an angle β, where β is any angle between 15° and 50°.

7. The detachable screen frame for a screen sedimentation centrifuge according to claim 6, characterized in that, The angle α between the slope and the screen frame is any angle between 45° and 65°, or the angle β between the slope and the screen bars is any angle between 20° and 25°.

8. The detachable screen frame for a screen sedimentation centrifuge according to claim 7, characterized in that, The sum of the included angles α and β is 90°.

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