CN221230815U - Centrifuge screen section and centrifuge - Google Patents

Abstract

The utility model provides a screen section of a centrifugal machine and the centrifugal machine, wherein the centrifugal machine comprises a shell, a plurality of screen rows are arranged on the shell, the shell is a cylindrical body with two open ends, and the screen rows are arranged along the extending direction of the axis of the shell; the screen row comprises a screen with screen slits; the screen slots of at least two of the plurality of screen rows are different in size. Through set up the sieve slit that has different sizes at centrifuge screen cloth section along the direction of movement of material to realize that the sieve slit size of centrifuge screen cloth section can be according to the product performance change, namely: the same screen section can be provided with screen gaps with various sizes so as to more reasonably enable water to be discharged through the screen, thereby remarkably improving the filtering effect, reducing the loss of small particle materials and improving the recovery rate of products.

Description

Centrifuge screen section and centrifuge

Technical Field

The utility model relates to the technical field of centrifuges, in particular to a screen section of a centrifuge and the centrifuge.

Background

The horizontal screen sedimentation centrifuge for coal is widely applied to dehydration of primary slime, flotation clean coal and tail coal, is high-efficiency slime water treatment equipment, and can effectively recycle slime particles. In the running process of the centrifugal machine, the materials move in the machine body along with the rotation of the inner screw of the centrifugal machine, and in the moving process of the materials, the water content of the materials is smaller and smaller, and the superfine particle ratio of the materials is smaller and smaller until the materials are discharged out of the centrifugal machine, so that the dehydration of the materials is completed. Currently, centrifuges have a settling dewatering section and a filtration dewatering section, also called a centrifuge screen section. The centrifugal machine screen section mainly comprises a screen and a spiral propeller, materials entering the centrifugal machine screen section are discharged through the screen under the action of centrifugal force, centrifugal liquid is formed, and large-particle materials continue to move forwards under the action of the spiral propeller and are discharged to a discharge port. Wherein the screen is an important component of the centrifuge screen section. The chinese patent with publication number CN202555410U discloses a centrifuge basket, as shown in fig. 1, including screen frame 1 and screen cloth 2, screen cloth 2 fixed welding is inboard at screen frame 1, and screen cloth 2 is that screen bar 3 welding is constituteed, forms screen slit 4 between two adjacent screen bars 3, and liquid can pass from screen slit 4, and solid particle can't pass, and then realizes the dehydration effect. The size of the screen slot 4 plays a critical role in the dewatering effect of the centrifuge. Since the water content of the materials is smaller and smaller in the process of moving in the centrifugal machine, the granularity composition of the materials is changed in real time, namely, the materials distributed in the centrifugal machine at the same time have different characteristics along the moving direction of the materials. In the structure of the screen 2 shown in fig. 1, the size of the screen slit 4 is unchanged, and materials with different characteristics cannot be matched, so that the dehydration effect of the centrifuge is affected, and the requirements of the lowest water content and the highest recovery rate cannot be met.

Disclosure of utility model

The embodiment of the utility model provides a screen section of a centrifugal machine and the centrifugal machine, which are used for solving the problem that the screen cannot be matched with materials with different characteristics, so that the dewatering effect of the centrifugal machine is affected.

In order to achieve the above object, according to one aspect of the present application, there is provided a centrifuge screen section including a housing provided with a plurality of screen rows, the housing being a cylindrical body having both ends open, the plurality of screen rows being disposed along an axis extending direction of the housing; the screen row comprises a screen with screen slits; the screen slots of at least two of the plurality of screen rows are different in size.

Optionally, the number of screens in a screen row is a plurality; in the same screen row, a plurality of screens are arranged at intervals along the circumferential direction of the shell, and the screen gaps of the screens are the same in size.

Optionally, the plurality of screen rows are equally spaced along the direction of extension of the axis of the housing.

Alternatively, the screens are the same size and shape in the same screen row.

Optionally, in each screen row, the distance between two adjacent screens is equal.

Optionally, the number of the screen slots in the screen is multiple, and the multiple screen slots are arranged in parallel.

Optionally, the screen comprises a plurality of screen bars, the plurality of screen bars are parallel to each other and are arranged at intervals, and a screen gap is formed between two adjacent screen bars.

Optionally, the screen further comprises a screen frame, the screen frame is mounted on the shell, the screen frame is a hollow frame, and the plurality of screen bars are fixed in the hollow frame.

Optionally, the inner side wall of the housing is provided with a wear layer.

According to another aspect of the present application there is provided a centrifuge comprising a centrifuge screen section as described above.

As can be seen from the technical solution provided by the above embodiment of the present utility model, the embodiment of the present utility model provides a screen section of a centrifuge and a centrifuge, where a plurality of screen rows are disposed in a housing along an axial extension direction of the housing, and the sizes of the screen slits of at least two screen rows are different. Because the moisture and the granularity components of the materials are changed along with the movement of the materials in the centrifugal machine, the materials with different moisture and different granularity at each moment should correspond to the sieve seams with different sizes, so that the small particle loss is less while the moisture is smoothly discharged, and the sieve seams with different sizes are arranged on the screen section of the centrifugal machine along the movement direction of the materials, so that the size of the sieve seam of the screen section of the centrifugal machine can be changed according to the product performance, namely: the same screen section can be provided with screen gaps with various sizes so as to more reasonably enable water to be discharged through the screen, thereby remarkably improving the filtering effect, reducing the loss of small particle materials and improving the recovery rate of products.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

FIG. 1 is a schematic diagram of a prior art centrifuge basket structure;

FIG. 2 is a schematic view of an expanded configuration of a screen section of a centrifuge (with the left side being a cross-sectional view) according to an embodiment of the present utility model;

Fig. 3 is a schematic structural view of a screen slot according to an embodiment of the present utility model.

1. A screen frame; 2. a screen; 3. a screen bar; 4. screening;

10. A housing;

11. A screen row; 12. a screen; 13. screening; 14. a screen bar; 15. a screen frame; 16. a screw; 17. and a wear-resistant layer.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present utility model and are not to be construed as limiting the present utility model.

As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless expressly stated otherwise, as understood by those skilled in the art. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or coupled. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

For the purpose of facilitating an understanding of the embodiments of the utility model, reference will now be made to the drawings of several specific embodiments illustrated in the drawings and in no way should be taken to limit the embodiments of the utility model.

Referring to fig. 2 to 3, according to an aspect of the present application, there is provided a centrifuge screen section including a housing 10, a plurality of screen rows 11 being provided on the housing 10, the housing 10 being a cylindrical body having both ends open, the plurality of screen rows 11 being provided along an axis extending direction of the housing 10; the screen row 11 comprises a screen 12, the screen 12 having screen slots 13; of the plurality of screen rows 11, the screen slots 13 of at least two screen rows 11 are different in size.

Wherein the housing 10 is a rigid structural member for carrying the screen 12. The shell 10 is made of carbon steel, wear-resistant steel or stainless steel. The housing 10 has a hollow cylindrical structure, for example, a truncated cone shape, a cylindrical shape, or the like. At least two screen rows 11 are arranged on the housing 10, each screen row comprising a screen 12. The screen 12 is provided with a plurality of screen slits 13 for discharging water and fine materials, and the number of the screen slits 13 of each screen 12 is one or more, and when the number of the screen slits 13 of the screen 12 is plural, the plurality of screen slits 13 are the same in size.

In some alternative embodiments, the length of the screen slot 13 coincides with the direction of movement of the material.

In other alternative embodiments, the screen slot 13 is a rectangular slot. Of course, the screen slot 13 may be of other shapes, and the application is not limited herein. Wherein the screen slot 13 is between 0.3mm and 1.3 mm.

It will be appreciated that a plurality of screen rows 11 are provided on the housing 10 along the direction of axial extension of the housing 10, the direction of axial extension of the housing 10 being the direction of movement of the material. The size of the screen slot 13 influences the discharge rate of moisture and the discharge amount of small particulate material. As the material moves in the centrifuge, the moisture and the granularity of the material are changed, and the material with different moisture and different granularity at each moment corresponds to the screen slot 13 with the best filtering.

In some other embodiments, the size of the screen slots 13 of different screen rows 11 gradually decreases in the direction of material movement. For example, when the material just entering the screen section of the centrifugal machine has high moisture and good fluidity and more fine particles, the material is filtered by adopting the small-size screen slot 13, so that the recovery rate is ensured while the loss of the small particles is less; when the material has moved to the end of the centrifuge screen section, the material is relatively dry, has poor fluidity, is not easy to dehydrate, and the fine particles are not in a flowing state and are not easy to run off, and the large-size screen slot 13 is adopted to filter the material, so that the water is ensured to be easily discharged, and the screen slot 13 is made into a combined screen slot, namely a plurality of screen slot sizes, so that more reasonable dehydration can be realized.

By applying the above technical solution of the present application, a plurality of screen rows 11 are provided in the housing 10 along the axial extension direction of the housing 10, wherein the screen slits 13 of at least two screen rows 11 are different in size. Because the moisture and the granularity components of the materials are changed along with the movement of the materials in the centrifugal machine, the materials with different moisture and different granularity at each moment correspond to the sieve seams 13 with different sizes, so that the small particle loss is less while the moisture is smoothly discharged, and the sieve seams 13 with different sizes are arranged on the screen section of the centrifugal machine along the movement direction of the materials, so that the size of the sieve seams 13 of the screen section of the centrifugal machine can be changed according to the product performance, namely: the same screen section can be provided with screen slits 13 with various sizes so as to more reasonably enable water to be discharged through the screen 12, thereby remarkably improving the filtering effect, reducing the loss of small particle materials and improving the recovery rate of products.

Referring to fig. 2, the number of screens 12 in the screen row 11 in some embodiments is a plurality; in the same screen row, a plurality of screens 12 are arranged at intervals along the circumferential direction of the housing 10, and the screen slits 13 of the plurality of screens 12 are the same size. Specifically, each screen row 11 includes a plurality of screens 12 arranged along the circumferential direction of the housing 10, and the screen slits 13 of the respective screens 12 in the same screen row 11 are the same in size. Since the characteristics (moisture content, particle size composition, viscosity, etc.) of the material distributed in the centrifuge at the same time are different, the material is positioned for different positions, and the screen slots 13 of different sizes should be matched according to the characteristics thereof to meet the best product performance to achieve the lowest moisture content and highest recovery rate, the size of the screen slots 13 of different screen rows 11 may be set to be different or the size of the screen slots 13 of at least two screen rows 11 may be set to be different to suit the material characteristic requirement. For example, referring to fig. 3, the centrifuge screen section has five screen rows 11, and the screen slots 13 of the five screen rows 11 have different sizes A1, A2, A3, A4, and A5, respectively, and the values of A1, A2, A3, A4, and A5 are all different.

Referring to fig. 2, a plurality of screen rows 11 in some embodiments are equally spaced along the axis of the housing 10. The casing 10 is a cylindrical structure having a central axis, and a plurality of screen rows 11 are uniformly distributed along an extending direction of the central axis, and distances between any two adjacent screen rows 11 are equal, so that materials can be uniformly filtered.

In other embodiments, the plurality of screen rows 11 may also be arranged non-equally spaced, not specifically limited herein.

Referring to fig. 2, the number of screens 12 in each screen row 11 in some embodiments is the same. Each screen row 11 includes a plurality of screens 12 therein, i.e., the number of screens 12 is 2, 3, or 4, etc. In the plurality of screen rows 11, the same number of screens 12 are provided in each screen row 11 for ease of manufacture. Of course, it is also possible to have a different number of screens 12 per screen row 11, or to have the same number of screens 12 for a portion of the screen rows 11, among a plurality of screen rows 11.

Referring to fig. 2, in some embodiments, the screens 12 are the same size and shape in the same screen row 11. Wherein, the shape of the screen 12 is rectangular, circular or polygonal, and the sizes of the screen 12 in the same column are the same so as to uniformly filter the materials.

In some other embodiments, different screen columns 11 may also have identically shaped screens 12.

Referring to fig. 2, in each screen row 11 in some embodiments, the distance between two adjacent screens 12 is equal. For convenience in arrangement and uniform filtration, the plurality of screens 12 of the same screen row 11 are uniformly arranged along the circumferential direction of the housing 10, and the distances between any adjacent two screens 12 are equal.

Referring to fig. 2, the screen mesh 12 in some embodiments has a plurality of screen slits 13, and the plurality of screen slits 13 are disposed parallel to each other. In order to fully filter the materials and reduce the water content of the materials, the screen 12 is provided with a plurality of screen slits 13, and two adjacent screen slits 13 are mutually parallel.

Referring to fig. 2, the screen 12 in some embodiments includes a plurality of screen bars 14, the plurality of screen bars 14 being disposed parallel to each other and spaced apart from each other, and a screen slot 13 being formed between two adjacent screen bars 14.

In some alternative embodiments, the screen bars 14 are rectangular bars, and a plurality of screen bars 14 are parallel to each other and equally spaced. To prevent solid particles in the material from escaping from the screen slot 13, the screen slot 13 is typically between 0.3mm and 1.3 mm.

Referring to fig. 2, the screen 12 in some embodiments further includes a screen frame 15, the screen frame 15 being mounted to the housing 10, the screen frame 15 being a hollow frame within which the plurality of screen bars 14 are secured. Compared with the screen bar 14 which is directly stuck on the inner side wall of the shell 10, the screen frame 15 is arranged, so that the screen frame 15 and the screen bar 14 can be integrally detached, and the detachment and replacement are more convenient. Wherein the screen frame 15 is rectangular, circular or polygonal.

In some alternative embodiments, the screen frame 15 is fixedly mounted to the housing 10 by screws 16.

In other alternative embodiments, the screen frame 15 is mounted on the outer side wall of the casing 10, and a spacer (not shown in the drawings) is disposed between the outer side wall of the casing 10 and the screen frame 15, and the spacer is used to adjust the gap between the screen frame 15 and the outer side wall, so as to ensure that the screen frame 15 is in close contact with the outer side wall of the casing 10, and prevent the screen frame 15 from shaking to affect the dewatering effect.

Referring to fig. 2, the inner side wall of the housing 10 in some embodiments is provided with a wear layer 17. The housing 10 is a hollow cylindrical structure having an inner side wall and an outer side wall. Because the centrifugal machine is rotating at a high speed, the materials are attached to the inner side wall under the action of the centrifugal machine, and the inner side wall is in direct contact with the materials and bears the serious impact of the materials, the centrifugal machine is easy to wear. By providing the wear-resistant layer 17 on the inner side wall of the housing 10, the inner side wall of the housing 10 is protected, and the service life is prolonged. The wear-resistant layer 17 is made of wear-resistant materials such as wear-resistant ceramics and tungsten carbide, and is fixed on the inner side wall by pasting.

According to another aspect of the present application there is provided a centrifuge comprising a centrifuge screen section as described above. Because the centrifuge provided by the application has the same advantages as the centrifuge screen section, the description is omitted here.

In summary, the embodiment of the utility model provides a screen section of a centrifuge and a centrifuge, which are matched with different combinations of screen slits 13 according to material characteristics (water content, granularity composition, viscosity and the like) of materials at different positions, namely, the same screen section is provided with the screen slits 13 with various sizes, so that water is reasonably discharged through the screen 12, the filtering and dewatering effects are obviously improved, the loss of small-particle materials is reduced, and the centrifuge has the advantages of flexible and convenient use, stability and reliability and good dewatering effect.

Those of ordinary skill in the art will appreciate that: the drawing is a schematic diagram of one embodiment and the modules or flows in the drawing are not necessarily required to practice the utility model.

Those of ordinary skill in the art will appreciate that: the components in the apparatus of the embodiments may be distributed in the apparatus of the embodiments according to the description of the embodiments, or may be located in one or more apparatuses different from the present embodiments with corresponding changes. The components of the above embodiments may be combined into one component or may be further split into a plurality of sub-components.

The present utility model is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present utility model are intended to be included in the scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope of the claims.

Claims (10)

1. The screen section of the centrifugal machine is characterized by comprising a shell, wherein a plurality of screen rows are arranged on the shell, the shell is a cylindrical body with two open ends, and the screen rows are arranged along the extending direction of the axis of the shell;

the screen array comprises a screen having screen slots;

The screen rows of the plurality of screen rows have at least two of the screen rows having different sizes of the screen slots.

2. The centrifuge screen section of claim 1 wherein the number of screens in the screen row is a plurality;

In the same screen row, a plurality of screens are arranged at intervals along the circumferential direction of the shell, and the screen gaps of the screens are the same in size.

3. The centrifuge screen section of claim 1 wherein a plurality of said screen rows are equally spaced along the direction of axial extension of said housing.

4. The centrifuge screen section of claim 2 wherein each of said screens in the same screen row are the same size and shape.

5. The centrifuge screen section of claim 2 wherein in each of the screen rows the distance between two adjacent screens is equal.

6. The centrifuge screen section of claim 1 wherein the number of screen slots in the screen is a plurality, the plurality of screen slots being disposed in parallel with one another.

7. The centrifuge screen section of claim 6 wherein the screen comprises a plurality of screen bars, a plurality of the screen bars being disposed parallel to each other and spaced apart, the screen slots being formed between two adjacent screen bars.

8. The centrifuge screen section of claim 7 wherein the screen further comprises a screen frame mounted to the housing, the screen frame being a hollow frame, a plurality of the screen bars being secured within the hollow frame.

9. The centrifuge screen section of claim 1 wherein the inner side wall of the housing is provided with a wear layer.

10. A centrifuge comprising a centrifuge screen section according to any one of claims 1 to 9.