Screen basket of horizontal vibration discharging centrifugal machine

Abstract

The utility model provides a screen basket of a horizontal vibration discharging centrifugal machine, and belongs to the technical field of coal washing. Comprising a centrifuge screen basket body of a circular truncated cone structure, and a dewatering fin structure is arranged on the centrifuge screen basket body; the centrifugal machine screen basket body comprises a screen frame of a circular truncated cone structure, the top of the screen frame of the circular truncated cone structure is a screen basket small end, the bottom of the screen frame of the circular truncated cone structure is a screen basket large end, a plurality of screen strips are arranged between the screen basket small end and the screen basket large end of the screen frame along a circular truncated cone generatrix of the screen frame, and a plurality of sets of rib plates are symmetrically arranged in the generatrix direction of the screen frame. The dewatering fin structure comprises an annular fin arranged around the outer side of the screen frame and a plurality of parallelogram fins, wherein each parallelogram fin is axially arranged on the rib plate. Starting from the characteristics of a discharge flow field of centrifugate, the flow guide fins are additionally arranged outside the screen basket to regulate the flow field between the screen basket and the machine shell, an environment beneficial to liquid discharge is created, and the dehydration performance of the horizontal vibration discharge centrifugal machine is improved.

Description

Technical Field

[0001] This utility model belongs to the field of coal washing and beneficiation technology, specifically relating to a screen basket for a horizontal vibrating unloading centrifuge. Background Technology

[0002] Horizontal vibrating discharge centrifuges are core equipment in coal preparation plants. Due to their advantages in handling a wide range of material particle sizes, large processing capacity, and high stability, they have become the main equipment for dewatering fine coal. The screen basket is the core component of the horizontal vibrating discharge centrifuge. The screen basket is a frustum-shaped body, with the larger end being the discharge end for the dewatered product and the smaller end connected to the centrifuge drive mechanism. Material carrying moisture undergoes centrifugal motion against the screen basket under the action of centrifugal force. Moisture, under the action of centrifugal force, passes through the gaps between the screen bars into the space between the screen basket and the centrifuge casing, and is finally discharged through the drain pipe located on the side or center of the centrifuge. However, in actual production, because the centrifugal liquid and coal slime passing through the screen basket are not guided, they easily coagulate and adhere inside the casing, causing poor discharge or even blockage. Furthermore, the irregular discharge of the centrifugal liquid can easily cause it to flow into the dewatered product, reducing the dewatering effect.

[0003] Existing technology CN215878357U discloses a combined centrifuge screen basket, including a screen frame and a screen mesh. The screen frame is welded together from an upper flange, a lower flange, and a keel. The keel is composed of square tube steel and flat steel, with mounting holes on the inner side of the square tube steel. The screen mesh is composed of n fan-shaped screen plates fastened into the mounting holes on the inner side of the screen frame. The fan-shaped screen plates are composed of three small fan-shaped screen plates of different sizes, injection molded from nanofiber composite polyoxymethylene material, stacked sequentially. Each small fan-shaped screen plate consists of an edge and a screening section, which is formed by interlocking vertical and horizontal screen bars. The cross-section of the vertical screen bars is uneven on one side of the inner side of the screen basket, making the screen gaps resemble louvers. Its main structure is not much different from existing screen meshes, relying on special materials and detailed structural features to process materials. This design is not only costly but also has poor dewatering effect. Utility Model Content

[0004] To address the shortcomings of existing technologies, a screen basket for a horizontal vibrating discharge centrifuge is provided. It has a simple structure and effectively regulates the airflow distribution between the screen basket and the centrifuge casing by setting annular winglets and multiple parallelogram winglets on the outside of the centrifuge screen basket body, thereby creating an environment conducive to liquid discharge and improving the stability of the horizontal vibrating discharge centrifuge.

[0005] To achieve the above technical objectives, this utility model discloses a horizontal vibrating discharge centrifuge screen basket, including a centrifuge screen basket body with a frustum structure. The centrifuge screen basket body is provided with a dehydration blade structure that can rotate with it and generate a swirling airflow between it and the centrifuge shell to facilitate liquid discharge.

[0006] The centrifuge sieve basket body includes a sieve frame with a frustum structure. The top of the sieve frame with the frustum structure is the small end of the sieve basket, and the bottom of the sieve frame with the frustum structure is the large end of the sieve basket. Multiple sieve bars are arranged along the generatrix of the frustum of the sieve frame between the small end and the large end of the sieve basket. Multiple sets of stiffeners are symmetrically arranged in the direction of the generatrix of the sieve frame.

[0007] The dewatering blade structure includes annular blades arranged around the outside of the sieve frame and multiple parallelogram blades, wherein each parallelogram blade is axially arranged on a stiffener.

[0008] Furthermore, the annular blade is positioned on the centrifuge basket body at a distance of 2 / 3 of the side length from the small end of the basket, and the annular blade is positioned perpendicular to the axis of the centrifuge basket body.

[0009] Furthermore, each parallelogram-shaped wing is arranged at equal intervals around the centrifuge sieve basket body, with the upper and lower two short sides of each parallelogram-shaped wing parallel to the top and bottom surfaces of the centrifuge sieve basket body, and one long side of each parallelogram-shaped wing connected to the stiffener.

[0010] Furthermore, the upper short side of the parallelogram-shaped wing is flush with the small end of the centrifuge basket body, and the lower short side of the parallelogram-shaped wing is connected to the annular wing.

[0011] Furthermore, the inner ring of the annular blade is connected to all the stiffening plates of the centrifuge basket body, and the outer ring diameter of the annular blade is 1.0-1.1 times the diameter of the large end of the basket.

[0012] Furthermore, the parallelogram-shaped blades are symmetrically distributed at equal intervals along the circumference of the centrifuge screen basket body, with a quantity of 4-8 blades.

[0013] Beneficial Effects: The screen basket of this device, installed in the horizontal vibrating discharge centrifuge, has annular blades and multiple parallelogram blades on the outside of the main body of the screen basket. This creates a swirling airflow between the screen basket and the centrifuge casing as the screen basket rotates. This swirling airflow helps to quickly discharge the water removed through the screen basket and also creates negative pressure on the outer surface of the screen basket, reducing the probability of clogging of the screen gaps. Simultaneously, the annular blades prevent water removed through the screen basket from re-entering the dehydrated product through the gap between the screen basket and the centrifuge casing. This device addresses the characteristics of the centrifugal liquid discharge flow field by adding guide blades to the outside of the screen basket to regulate the flow field between the screen basket and the casing, creating an environment conducive to liquid discharge and improving the dehydration performance of the horizontal vibrating discharge centrifuge. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the screen basket of the horizontal vibrating unloading centrifuge described in this utility model;

[0015] Figure 2 This is a top view of the screen basket of the horizontal vibrating unloading centrifuge described in this utility model.

[0016] In the diagram: A - small end of the sieve basket, B - parallelogram wing, C - sieve bar, D - large end of the sieve basket, E - stiffener, F - annular wing. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings:

[0018] like Figure 1 As shown, this utility model discloses a horizontal vibrating discharge centrifuge screen basket, characterized in that: it includes a centrifuge screen basket body with a frustum structure, and the centrifuge screen basket body is provided with a dehydration wing structure that can rotate with it and generate a swirling airflow between it and the centrifuge shell to facilitate liquid discharge.

[0019] The centrifuge sieve basket body includes a sieve frame with a frustum structure. The top of the sieve frame with the frustum structure is the small end A of the sieve basket, and the bottom of the sieve frame with the frustum structure is the large end D of the sieve basket. Multiple sieve bars C are arranged between the small end A and the large end D of the sieve basket along the generatrix of the frustum of the sieve frame. Multiple sets of stiffening plates E are symmetrically arranged in the direction of the generatrix of the sieve frame.

[0020] The dewatering blade structure includes annular blades F arranged around the outside of the screen frame and multiple parallelogram blades B, wherein each parallelogram blade B is axially arranged on the stiffener E; the annular blade F is arranged on the centrifuge screen basket body at a position 2 / 3 of the length from the side of the small end A of the screen basket, and the annular blade F is arranged perpendicular to the axis of the centrifuge screen basket body; each parallelogram blade B is arranged at equal intervals around the centrifuge screen basket body, the upper and lower short sides of each parallelogram blade B are parallel to the top and bottom surfaces of the centrifuge screen basket body, and one long side of each parallelogram blade B is connected to the stiffener E; the upper short side of the parallelogram blade B is flush with the small end A of the centrifuge screen basket body, and the lower short side of the parallelogram blade B is connected to the annular blade F.

[0021] like Figure 2 As shown, the inner ring of the annular blade is connected to all the stiffeners E of the centrifuge basket body, and the outer ring diameter of the annular blade is 1.0-1.1 times the diameter of the large end D of the basket; the parallelogram blades B are symmetrically distributed at equal intervals along the circumference of the centrifuge basket body, and the number of blades is 4-8.

Claims

1. A horizontal vibratory unloading centrifuge screen basket, characterized by: The centrifuge basket body comprises a circular truncated cone structure, and a dehydration wing structure is arranged on the centrifuge basket body to generate a rotating air flow between the centrifuge basket body and a centrifuge shell, thereby facilitating liquid discharge. The centrifuge basket body comprises a circular truncated cone structure, and a dehydration wing structure is arranged on the centrifuge basket body to generate a rotating air flow between the centrifuge basket body and a centrifuge shell, thereby facilitating liquid discharge. The centrifuge basket body comprises a circular truncated cone structure, and a dehydration wing structure is arranged on the centrifuge basket body to generate a rotating air flow between the centrifuge basket body and a centrifuge shell, thereby facilitating liquid discharge.

2. The horizontal vibrating star screen basket of claim 1, wherein: The dehydration wing structure comprises a ring-shaped wing (F) arranged around the outer side of the screen frame and a plurality of parallelogram wings (B), wherein each parallelogram wing (B) is arranged axially on the rib plate (E).

3. The horizontal vibrating star screen of claim 2 wherein: The ring-shaped wing (F) is arranged on the centrifuge basket body at a position 2 / 3 of the length of the side of the small end (A) of the screen basket, and the ring-shaped wing (F) is arranged perpendicular to the axis of the centrifuge basket body.

4. The horizontal vibrating star screen of claim 3 wherein: Each parallelogram wing (B) is arranged at equal intervals around the centrifuge basket body, and the upper and lower short edges of each parallelogram wing (B) are parallel to the top and bottom surfaces of the centrifuge basket body, respectively.

5. The horizontal vibrating star screen of claim 1 wherein: The upper short edge of the parallelogram wing (B) is flush with the small end (A) of the screen basket of the centrifuge basket body, and the lower short edge of the parallelogram wing (B) is connected to the ring-shaped wing (F).

6. The horizontal vibrating star screen of claim 1 wherein: The inner circle of the ring-shaped wing is connected to all the rib plates (E) of the centrifuge basket body, and the outer circle of the ring-shaped wing has a diameter of 1.0-1.1 times the diameter of the large end (D) of the screen basket. The parallelogram wings (B) are symmetrically distributed at equal intervals along the circumferential direction of the centrifuge basket body, and the number is 4-8.

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