A conical drum device for a horizontal screw centrifuge

Abstract

This utility model discloses a conical drum device for a horizontal decanter centrifuge, relating to the field of horizontal decanter centrifuge technology. It includes a straight drum body and a conical drum body, with a positioning component between them. The positioning component includes an inner positioning groove fixedly formed on the inner wall of the end of the straight drum body, and an outer positioning groove fixedly formed on the outer ring of the end of the conical drum body. The outer and inner positioning grooves are interlocked. This utility model, through the installation of the positioning component, pre-positions the welding area between the straight and conical drum bodies before welding, thereby ensuring the welding quality. This solves the problem in existing horizontal decanter centrifuges where the conical and straight drum bodies cannot be pre-positioned before welding, leading to easy misalignment during welding and affecting the welding quality.

Description

Technical Field

[0001] This utility model relates to the field of horizontal screw centrifuge technology, and in particular to a conical drum device for a horizontal screw centrifuge. Background Technology

[0002] A horizontal screw centrifuge is a horizontal, continuously operating sedimentation device that uses a screw conveyor for unloading. It generally includes a rotating drum and a screw conveyor located inside the drum. The separation chamber is formed by the outer wall of the screw conveyor cylinder and the inner wall of the rotating drum. The material enters the separation chamber through the feed inlet. Due to the speed difference between the screw conveyor and the rotating drum, the material achieves solid-liquid phase separation in the separation chamber. Since the sedimentation of the suspension, the conveying of the sludge, and the dewatering are all completed in the rotating drum, the rotating drum is the main component of the horizontal screw centrifuge.

[0003] The structure, material, shape, and parameters of the rotating drum largely determine the characteristics and process effects of the centrifuge. Existing patent publication number CN206526956U, entitled "A Rotating Drum for a Horizontal Screw Centrifuge for Drug Separation," proposes a new invention comprising a differential, a housing, a rotating drum housed within the housing, and a screw conveyor within the inner cavity of the rotating drum. The rotating drum includes a conical section and a straight section. The larger end of the conical section has a first engaging portion, and one end of the straight section has a second engaging portion that engages with the first engaging portion. The straight section and the conical section are engaged and fixed by welding. Reinforcing ribs are provided on the outer surfaces of both the conical and straight sections. The cone angle of the conical section is 16°. The design of the rotating drum structure of this invention effectively improves equipment stability and production safety, while also enhancing wastewater treatment efficiency.

[0004] However, in the welding process of the conical drum of the horizontal screw centrifuge disclosed in the above patent, the conical drum body and the straight drum body cannot be preliminarily positioned before welding. This causes the conical drum body and the straight drum body to easily shift during the welding process, affecting the welding quality. Therefore, it is necessary to propose a conical drum device for a horizontal screw centrifuge to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a conical drum device for a horizontal screw centrifuge, in order to solve the problem mentioned in the background art that in the existing horizontal screw centrifuges, the conical drum body and the straight drum body cannot be preliminarily positioned before welding, which leads to the easy displacement between the conical drum body and the straight drum body during the welding process, affecting the welding quality.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a conical drum device for a horizontal screw centrifuge, comprising a straight drum body and a conical drum body, wherein a positioning component is provided between the straight drum body and the conical drum body;

[0007] The positioning component includes an inner positioning groove, which is fixedly formed on the inner wall of the end of the straight drum body. An outer positioning groove is fixedly formed on the outer ring of the end of the conical drum body. The outer positioning groove and the inner positioning groove are interlocked. A slot is formed on the side of the outer positioning groove. A support base is fixedly provided on the outer ring of the straight drum body near one end. A sealing cavity is provided inside the support base. A movable plate is slidably arranged inside the sealing cavity. An insertion rod is fixedly provided at the end of the movable plate. A through hole is fixedly formed on the side wall of the conical drum body for the insertion rod to move through. The insertion rod moves into the interior of the inner positioning groove and into the slot. An inclined surface is provided at the end of the insertion rod. A spring is fixedly connected between the movable plate and the inner wall of the sealing cavity.

[0008] Preferably, there is a gap between the end of the straight rotating drum body and the end of the outer positioning groove, and this gap is a welded seam.

[0009] Preferably, the inner diameter of the straight drum body and the inner diameter of the conical drum body near the end of the straight drum body are the same.

[0010] Preferably, four support seats are provided, and the four support seats are evenly distributed in a ring.

[0011] Preferably, a magnetic plate is fixedly installed on the side of the movable plate away from the insertion rod, an electromagnet is fixedly installed on the side of the support base, and an electric wire is connected to the side of the electromagnet.

[0012] Preferably, reinforcing ribs are fixedly provided on the outer rings of both the straight-rotating drum body and the conical-rotating drum body, wherein the reinforcing ribs on the straight-rotating drum body are located at the middle position of the outer ring of the straight-rotating drum body.

[0013] Preferably, the inner positioning groove is provided with a conical groove at one end near the conical drum body.

[0014] The technical effects and advantages of this utility model are as follows:

[0015] This invention, when welding a straight drum body and a conical drum body, interlocks the outer positioning groove on the conical drum body with the inner positioning groove on the straight drum body, thereby ensuring precise alignment of the two drum bodies and reducing alignment difficulty. Simultaneously, when the end of the conical drum body is inserted into the inner positioning groove, the inclined surface pushes the insert rod and movable plate outward, compressing the spring. When the end of the conical drum body and the end of the inner positioning groove are aligned, the slot and the insert rod are aligned, the spring returns to its elasticity, and the insert rod is pushed into the slot. This prevents misalignment between the conical and straight drum bodies, ensuring welding quality and solving the problem in existing horizontal screw centrifuges where the conical and straight drum bodies cannot be pre-positioned before welding, leading to misalignment and affecting welding quality.

[0016] The support base is provided in four positions, which are evenly arranged in a ring, so that the conical drum body can fit evenly against the end of the inner positioning groove, ensuring that the central axes of the straight drum body and the conical drum body are on the same straight line.

[0017] To account for operational errors, when it is necessary to disassemble the straight-rotating drum body and the conical-rotating drum body, they should not be welded first. In order to facilitate pulling the insert rod out of the slot, power is supplied to the wires to magnetize the electromagnet. Under the attraction of the magnetic plate, the movable plate and the insert rod are pulled outward, so that the insert rod can be pulled out of the slot. This makes it easier to disassemble the straight-rotating drum body and the conical-rotating drum body, thus improving the practicality of the device. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the conical drum device of a horizontal screw centrifuge according to the present invention;

[0019] Figure 2 This is a schematic diagram of the overall cross-sectional structure of the conical drum device of a horizontal screw centrifuge according to the present invention;

[0020] Figure 3 For the present utility model Figure 2 Enlarged schematic diagram of the structure at point A;

[0021] Figure 4 This is a schematic diagram of the split cross-sectional structure of the straight rotating drum body and the conical rotating drum body of this utility model;

[0022] Figure 5 This is a schematic diagram of the cross-sectional structure of the conical drum body of this utility model.

[0023] In the diagram: 1. Straight-rotating drum body; 2. Conical-rotating drum body; 3. Inner positioning groove; 4. Outer positioning groove; 5. Slot; 6. Support base; 7. Spring; 8. Movable plate; 9. Insert rod; 10. Inclined surface; 11. Magnetic plate; 12. Electromagnet; 13. Wire; 14. Conical groove; 15. Reinforcing rib; 16. Welded seam. Detailed Implementation

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

[0025] This utility model provides, for example Figures 1-5 The conical drum device of a horizontal screw centrifuge shown includes a straight drum body 1 and a conical drum body 2. In the prior art, the straight drum body 1 and the conical drum body 2 are generally fixed by flange connection or welding. During the welding process, the straight drum body 1 and the conical drum body 2 need to be precisely aligned, which is difficult and can easily lead to displacement of the straight drum body 1 and the conical drum body 2 during the welding process, affecting the welding quality. Therefore, this utility model provides a positioning component between the straight drum body 1 and the conical drum body 2. By installing the positioning component, the welding parts of the straight drum body 1 and the conical drum body 2 are initially positioned before welding, thereby ensuring the welding quality between the two.

[0026] Specifically, the positioning component includes an inner positioning groove 3, which is fixedly opened on the inner wall of the end of the straight drum body 1. An outer positioning groove 4 is fixedly opened on the outer ring of the end of the conical drum body 2. The outer positioning groove 4 and the inner positioning groove 3 are interlocked. A slot 5 is opened on the side of the outer positioning groove 4. A support seat 6 is fixedly installed on the outer ring of the straight drum body 1 near one end of the straight drum body 1. A sealing cavity is provided inside the support seat 6. A movable plate 8 is slidably installed inside the sealing cavity. An insertion rod 9 is fixedly installed at the end of the movable plate 8. A through hole is fixedly opened on the side wall of the conical drum body 2 for the insertion rod 9 to move through. The insertion rod 9 moves into the interior of the inner positioning groove 3 and into the interior of the slot 5. An inclined surface 10 is provided at the end of the insertion rod 9. A spring 7 is fixedly connected between the movable plate 8 and the inner wall of the sealing cavity.

[0027] The outer positioning groove 4 on the conical drum body 2 is engaged with the inner positioning groove 3 on the straight drum body 1, thereby accurately aligning the straight drum body 1 and the conical drum body 2 and reducing the difficulty of alignment. At the same time, when the end of the conical drum body 2 is inserted into the interior of the inner positioning groove 3, the inclined surface 10 pushes the insertion rod 9 and the movable plate 8 outward, compressing the spring 7. When the end of the conical drum body 2 and the end of the inner positioning groove 3 are in contact, the locking groove 5 and the insertion rod 9 are aligned, and the spring 7 returns to its elasticity. The push rod 9 is inserted into the slot 5, thus preventing the conical drum body 2 and the straight drum body 1 from shifting. This ensures the quality of the weld when welding the conical drum body 2 and the straight drum body 1, solving the problem that in existing horizontal screw centrifuges, the conical drum body 2 and the straight drum body 1 cannot be pre-positioned before welding, which leads to easy shifting between the conical drum body 2 and the straight drum body 1 during the welding process, affecting the quality of the weld.

[0028] Furthermore, there is a gap between the end of the straight drum body 1 and the end of the outer positioning groove 4. This gap is a weld seam 16. The weld seam 16 makes the weld between the conical drum body 2 and the straight drum body 1 more secure.

[0029] Furthermore, the inner diameter of the straight drum body 1 is the same as the inner diameter of the conical drum body 2 at the end near the straight drum body 1. This arrangement ensures that the inner wall of the conical drum is smooth.

[0030] Furthermore, four support seats 6 are provided, and the four support seats 6 are evenly distributed in a ring. This arrangement allows the conical drum body 2 to fit evenly against the end of the inner positioning groove 3, ensuring that the central axes of the straight drum body 1 and the conical drum body 2 are on the same straight line.

[0031] To prevent operational errors, when it is necessary to disassemble the straight drum body 1 and the conical drum body 2, they should not be welded first. In order to facilitate pulling the insertion rod 9 out of the slot 5, a magnetic plate 11 is fixedly installed on the side of the movable plate 8 away from the insertion rod 9, and an electromagnet 12 is fixedly installed on the side of the support base 6. The side of the electromagnet 12 is connected to a wire 13. After power is supplied to the wire 13, the electromagnet 12 becomes magnetic. Under the attraction of the magnetic plate 11, the movable plate 8 and the insertion rod 9 are pulled outward, so that the insertion rod 9 is pulled out of the slot 5, which facilitates the disassembly of the straight drum body 1 and the conical drum body 2 and improves the practicality of the device. It should be noted that the support base 6 is made of non-magnetic material.

[0032] The sealed cavity design prevents the liquid inside the conical drum from leaking out from the outside, ensuring the drum's airtightness.

[0033] Furthermore, reinforcing ribs 15 are fixedly provided on the outer rings of both the straight drum body 1 and the conical drum body 2. The reinforcing ribs 15 on the straight drum body 1 are located in the middle of the outer ring of the straight drum body 1. The overall strength of the conical drum is enhanced by the setting of the reinforcing ribs 15.

[0034] Furthermore, a conical groove 14 is provided at one end of the inner positioning groove 3 near the conical drum body 2. The conical groove 14 allows the end of the conical drum body 2 to be better inserted into the inner positioning groove 3, thereby improving the positioning efficiency of the straight drum body 1 and the conical drum body 2.

[0035] Working principle: When welding the straight drum body 1 and the conical drum body 2, this utility model interlocks the outer positioning groove 4 on the conical drum body 2 with the inner positioning groove 3 on the straight drum body 1, thereby accurately aligning the straight drum body 1 and the conical drum body 2 and reducing the difficulty of alignment. At the same time, when the end of the conical drum body 2 is inserted into the interior of the inner positioning groove 3, the inclined surface 10 pushes the insertion rod 9 and the movable plate 8 outward, compressing the spring 7. When the end of the conical drum body 2 and the end of the inner positioning groove 3 are in contact, the slot 5 and the insertion rod 9 are aligned, the spring 7 recovers its elasticity, and pushes the insertion rod 9. Insert the rod 9 into the slot 5 to prevent misalignment between the conical drum body 2 and the straight drum body 1, thus ensuring the quality of the weld when welding the conical drum body 2 and the straight drum body 1. Considering operational errors, when it is necessary to disassemble the straight drum body 1 and the conical drum body 2, do not weld them first. In order to facilitate pulling the rod 9 out of the slot 5, power is supplied to the wire 13 to magnetize the electromagnet 12. Under the attraction of the magnetic plate 11, the movable plate 8 and the rod 9 are pulled outward, so that the rod 9 is pulled out of the slot 5, thus facilitating the disassembly of the straight drum body 1 and the conical drum body 2.

[0036] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A conical bowl arrangement for a decanter centrifuge, comprising a straight bowl cylinder (1) and a conical bowl cylinder (2), characterized in that: A positioning assembly is provided between the straight-rotating drum body (1) and the conical-rotating drum body (2); The positioning component includes an inner positioning groove (3), which is fixedly opened on the inner wall of the end of the straight drum body (1). An outer positioning groove (4) is fixedly opened on the outer ring of the end of the conical drum body (2). The outer positioning groove (4) and the inner positioning groove (3) are engaged with each other. A slot (5) is opened on the side of the outer positioning groove (4). A support seat (6) is fixedly provided on the outer ring of the straight drum body (1) near one end of the straight drum body (1). The support seat (6) is provided with a... A sealing cavity is provided with a movable plate (8) that slides inside the sealing cavity. A rod (9) is fixedly provided at the end of the movable plate (8). A through hole is fixedly provided on the side wall of the conical drum body (2) for the rod (9) to pass through. The rod (9) extends into the inner positioning groove (3) and into the slot (5). The end of the rod (9) is provided with a slope (10). A spring (7) is fixedly connected between the movable plate (8) and the inner wall of the sealing cavity.

2. The conical drum device for a horizontal screw centrifuge according to claim 1, characterized in that: There is a gap between the end of the straight rotating drum body (1) and the end of the outer positioning groove (4), which is a weld seam (16).

3. The conical drum device for a horizontal screw centrifuge according to claim 2, characterized in that: The inner diameter of the straight drum body (1) is the same as the inner diameter of the conical drum body (2) near the end of the straight drum body (1).

4. The conical drum device for a horizontal screw centrifuge according to claim 1, characterized in that: There are four support seats (6), which are arranged in a ring and evenly distributed.

5. The conical drum device for a horizontal screw centrifuge according to claim 4, characterized in that: A magnetic plate (11) is fixedly installed on the side of the movable plate (8) away from the plug rod (9), and an electromagnet (12) is fixedly installed on the side of the support base (6). An electric wire (13) is connected to the side of the electromagnet (12).

6. The conical drum device for a horizontal screw centrifuge according to claim 3, characterized in that: Both the straight-rotating drum body (1) and the conical-rotating drum body (2) are fixedly provided with reinforcing ribs (15) on their outer rings, with the reinforcing ribs (15) on the straight-rotating drum body (1) located at the middle of the outer ring of the straight-rotating drum body (1).

7. The conical drum device for a horizontal screw centrifuge according to claim 6, characterized in that: The inner positioning groove (3) is provided with a conical groove (14) at one end near the conical drum body (2).

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