Pushing centrifugal machine with conical matching structure

Abstract

The utility model discloses a material pushing centrifugal machine with a conical matching structure. The material pushing centrifugal machine is characterized by further comprising the conical matching structure arranged on a material pushing shaft and a first-stage rotary drum bottom. The conical matching structure comprises a conical hole formed in the first-stage rotary drum bottom and a conical connector which is arranged on the material pushing shaft and matched with the conical hole. By adopting the conical matching structure and depending on the taper self-centering characteristic during matching, the assembly process is simplified, the assembly quality and efficiency are improved, meanwhile, compared with cylindrical surface matching, the action area of force applied by the pushing shaft to the first-stage drum bottom is increased, the load borne by the center part of the drum bottom is reduced, and the service life of the drum is prolonged. Meanwhile, 90-degree right-angle transition between the cylindrical surface and the bottom surface of the center bottom of the first-stage rotary drum is removed, so that the possibility of stress concentration is reduced.

Description

Technical Field

[0001] The utility model relates to a pusher centrifuge, in particular to a pusher centrifuge with a conical matching structure. Background Art

[0002] The pusher centrifuge is a continuous, highly efficient solid-liquid separation device. After material enters the centrifuge through a feed pipe, a distribution device evenly distributes it onto the screen within the high-speed rotating first-stage drum. This screen filters most of the liquid while also trapping solids, forming a filter cake. The first-stage drum is also connected to a hydraulic piston reversing mechanism via a pusher shaft, achieving both rotational and reciprocating motion. The reciprocating motion of the high-speed rotating first-stage drum gradually pushes the filter cake toward the second-stage drum and the discharge chamber at the rear end, ultimately exiting the machine.

[0003] In the prior art, the connection and matching method between the first-stage drum and the pusher shaft is usually to use a gap-type cylindrical surface and end face matching to complete the positioning, and then fasten the two together with bolts. However, this cylindrical surface matching method is affected by strength, cost and other aspects. The inner hole of the bottom center of the first-stage drum cannot be designed to be deeper, and there are certain limitations. As a result, the two parts may have problems such as eccentricity and tilted installation during the assembly process, affecting the assembly accuracy and reducing the assembly efficiency. In addition, the circumferential surface of the inner hole of the bottom center of the first-stage drum and the bottom surface are at a 90° right angle transition. When the bottom of the first-stage drum is subjected to the reciprocating motion force transmitted by the pusher shaft, stress concentration will occur at the right-angle transition and it will be damaged. For this reason, a pusher centrifuge with a conical matching structure is proposed. Utility Model Content

[0004] The purpose of the utility model is to solve the above problems and to provide a pusher centrifuge with a conical matching structure.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical solution: a pusher centrifuge with a conical matching structure, comprising a second-stage drum, a first-stage drum bottom placed in the second-stage drum, a first-stage drum ring installed on the first-stage drum bottom, and a pusher shaft connected to the first-stage drum bottom at one end; the utility model is characterized in that it also includes a conical matching structure provided on the pusher shaft and the first-stage drum bottom; the conical matching structure includes a conical hole provided on the first-stage drum bottom and a conical connector provided on the pusher shaft and adapted to the conical hole.

[0006] More preferably, it also includes a fixed plate placed on one side of the bottom of the first-stage drum and fixedly connected to the pusher shaft.

[0007] More preferably, the device further comprises a protective cover installed on the bottom of the first-stage drum for protecting the connection between the bottom of the first-stage drum, the fixed plate and the pusher shaft.

[0008] More preferably, the method further includes a baffle installed on the second stage drum and located within the first stage drum circle.

[0009] Further preferably, the bottom of the first-stage drum is overall conical.

[0010] The beneficial effects of the utility model are as follows: by adopting a tapered matching structure, the self-centering characteristic of the taper is relied upon during matching, thereby simplifying the assembly process and improving assembly quality and efficiency. At the same time, compared with cylindrical surface matching, the effective area of ​​the force exerted by the push shaft on the bottom of the first-stage drum is increased, and the load on the center of the drum bottom is reduced. At the same time, the 90° right-angle transition between the cylindrical surface and the bottom surface of the center of the first-stage drum is removed, thereby reducing the possibility of stress concentration.

[0011] By adopting a conical setting for the bottom of the first-stage drum as a whole, a part of the axial force transmitted by the pusher shaft is divided into radial force, thereby reducing the possibility of axial deformation of the bottom of the first-stage drum. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Attachment Figure 1 It is a structural diagram of the utility model;

[0013] Attachment Figure 2 It is a partial enlarged structural schematic diagram of the utility model.

[0014] Legend: 1. Second-stage drum; 2. First-stage drum bottom; 3. First-stage drum ring; 4. Ejector shaft; 5. Conical hole; 6. Conical connector; 7. Fixing plate; 8. Protective cover; 9. Baffle. DETAILED DESCRIPTION

[0015] Next, we will further explain the pusher centrifuge with a conical matching structure described in the present invention with reference to the accompanying drawings.

[0016] It should be noted that all directional indications such as up, down, left, right, front, back, etc. in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0017] In this utility model, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; it can mean mechanical connection or electrical connection; it can mean direct connection or indirect connection through an intermediate medium; it can mean internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0018] See Figure 1-2 As shown in the figure, a pusher centrifuge with a conical matching structure includes a second-stage drum 1, a first-stage drum bottom 2 placed in the second-stage drum 1, a first-stage drum ring 3 installed on the first-stage drum bottom 2, and a pusher shaft 4 connected to the first-stage drum bottom 2 at one end; the centrifuge is characterized by further including a conical matching structure provided on the pusher shaft 4 and the first-stage drum bottom 2; the conical matching structure includes a conical hole 5 provided on the first-stage drum bottom 2 and a conical connector 6 provided on the pusher shaft 4 and adapted to the conical hole 5;

[0019] By adopting a tapered fitting structure and relying on the self-centering characteristics of the taper during fitting, the assembly process is simplified and the assembly quality and efficiency are improved. At the same time, compared with the cylindrical surface fitting, the effective area of ​​the force exerted by the push shaft 4 on the first-stage drum bottom 2 is increased, and the load on the center of the drum bottom is reduced. At the same time, the 90° right-angle transition between the cylindrical surface and the bottom surface of the first-stage drum center is removed, reducing the possibility of stress concentration.

[0020] In one embodiment, the invention further comprises a fixing plate 7 which is placed on one side of the first stage drum bottom 2 and fixedly connected to the pusher shaft 4 via bolts, and is used to fix the first stage drum bottom 2 and the pusher shaft 4 .

[0021] In one embodiment, it further includes a protective cover 8 installed on the first-stage drum bottom 2 for protecting the connection between the first-stage drum bottom 2, the fixed plate 7 and the pusher shaft 4; the protective cover 8 plays a protective isolation role.

[0022] In one embodiment, it further includes a baffle 9 mounted on the second stage drum 1 and located within the first stage drum ring 3;

[0023] In one embodiment, the first-stage drum bottom 2 is configured as a cone as a whole. By configuring the first-stage drum bottom 2 as a cone as a whole, a portion of the axial force transmitted by the pusher shaft 4 is divided into radial force, thereby reducing the possibility of axial deformation of the first-stage drum bottom 2.

[0024] The protection scope of the present invention is not limited to the above embodiment and its variations. Conventional modifications and replacements made by those skilled in the art based on the contents of this embodiment fall within the protection scope of the present invention.

Claims

1. A pusher centrifuge with a conical fitting structure, comprising a second-stage drum (1), a first-stage drum bottom (2) placed in the second-stage drum (1), a first-stage drum ring (3) mounted on the first-stage drum bottom (2), and a pusher shaft (4) having one end connected to the first-stage drum bottom (2); wherein: It also includes a conical matching structure provided on the push shaft (4) and the first-stage drum bottom (2); the conical matching structure includes a conical hole (5) provided on the first-stage drum bottom (2) and a conical connector (6) provided on the push shaft (4) and adapted to the conical hole (5).

2. The pusher centrifuge with a conical fitting structure according to claim 1, characterized in that: It also includes a fixed plate (7) placed on one side of the first-stage drum bottom (2) and fixedly connected to the pusher shaft (4).

3. The pusher centrifuge with a conical fitting structure according to claim 2, characterized in that: It also includes a protective cover (8) mounted on the first-stage drum bottom (2) for protecting the connection between the first-stage drum bottom (2), the fixed plate (7) and the pusher shaft (4).

4. The pusher centrifuge with a conical fitting structure according to claim 1, characterized in that: It also includes a baffle (9) mounted on the second-stage drum (1) and located within the first-stage drum ring (3).

5. The pusher centrifuge with a conical fitting structure according to claim 1, characterized in that: The first-stage drum bottom (2) is configured as a cone as a whole.

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