Sealing structure of magnetic recycling machine

Abstract

The utility model discloses a sealing structure of a magnetic recycling machine, and belongs to the field of sewage treatment equipment. A sealing structure of a magnetic recycling machine is installed on the outer side of a box body of the magnetic recycling machine. A magnetic roller shaft of the magnetic recycling machine penetrates through the box body and extends to the outer side of the box body. The sealing structure comprises a shaft sleeve arranged on the outer side of the magnetic roller shaft in a matched and sleeving mode, and a cover plate is fixed to the outer side of the box body. A first sealing element is mounted between the shaft sleeve and the magnetic roller shaft, and a second sealing element is mounted between the cover plate and the box body; a small hole and a large hole are formed in the sides, close to and away from the box body, of the cover plate correspondingly, the large hole and the small hole are coaxial and communicate with each other, and the shaft sleeve penetrates through the large hole, extends into the small hole and is matched with the small hole. An annular gap is formed between the shaft sleeve and the large hole, and a third sealing piece is installed in the annular gap. When the magnetic recycling machine runs, the shaft sleeve serves as a transition piece and can become an easy-to-wear point, and compared with the mode that the easy-to-wear point directly appears on the magnetic roller shaft, later replacement is facilitated, and cost is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of sewage treatment equipment, and specifically relates to a sealing structure for a magnetic recovery machine. Background Technology

[0002] In the magnetic coagulation sedimentation wastewater treatment process, a magnetic recovery machine is needed to recover and reuse the magnetic powder in the magnetic sludge. The magnetic recovery machine uses a magnetic roller with a strong magnetic field on its surface that rotates continuously to adsorb the magnetic powder in order to achieve the purpose of recovery. At the same time, it is necessary to keep both ends of the magnetic roller shaft sealed. However, there is still a possibility that magnetic powder or wastewater mixed with magnetic powder may flow through the magnetic roller shaft, causing wear on the journal. Existing magnetic powder recovery devices have problems such as poor sealing of the magnetic roller rotating shaft and high replacement costs due to journal wear. Therefore, a sealing structure for the magnetic recovery machine is proposed. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a sealing structure for a magnetic recycling machine, which solves the problems in the existing technology.

[0004] The objective of this utility model can be achieved through the following technical solutions:

[0005] A sealing structure for a magnetic recycling machine is installed on the outside of the housing of the magnetic recycling machine. The magnetic roller shaft of the magnetic recycling machine passes through the housing and extends to the outside of the housing. The sealing structure includes a bushing fitted on the outside of the magnetic roller shaft, and a cover plate fixed on the outside of the housing. A first sealing element is installed between the bushing and the magnetic roller shaft, and a second sealing element is installed between the cover plate and the housing.

[0006] The cover plate has a small hole and a large hole on the side near and away from the housing, respectively. The large hole and the small hole are coaxial and connected. The bushing passes through the large hole and extends into the small hole, and mates with the small hole. An annular gap is formed between the bushing and the large hole, and a third seal is installed in the annular gap. When the magnetic recycling machine is running, the bushing, as a transitional component, can become a wear point. Compared to wear points appearing directly on the magnetic roller shaft, this facilitates later replacement and reduces costs.

[0007] Furthermore, the third sealing element is a skeleton oil seal.

[0008] Furthermore, the skeleton oil seal includes an outer skeleton and a rubber oil seal located in the inner ring. A self-tightening helical spring is sleeved on the outer side of the rubber oil seal. The rubber oil seal is sleeved on the bushing. The outer skeleton is interference-fitted with the large hole on the cover plate. The self-tightening helical spring provides radial tightening force to the rubber oil seal and makes the rubber oil seal fit tightly against the bushing.

[0009] Furthermore, both the first and second seals are O-rings.

[0010] Furthermore, a second annular groove is provided on the side of the cover plate near the box body, and a second sealing element is installed in the second annular groove.

[0011] Furthermore, the inner ring of the bushing has a first annular groove, and the second seal is installed in the first annular groove.

[0012] Furthermore, the cover plate is fixed to the outside of the box body by bolts.

[0013] Furthermore, the bushing is connected to the magnetic roller shaft by bolts.

[0014] Furthermore, the bushing has a through hole that extends radially through the bushing, and the magnetic roller shaft has a corresponding threaded hole. A bolt is installed in the through hole, and the bolt extends through the through hole and is screwed into the threaded hole.

[0015] The beneficial effects of this utility model are:

[0016] By fitting a bushing on the outside of the magnetic roller shaft and fixing a cover plate on the outside of the housing, the bushing and the magnetic roller shaft are sealed by a first seal, the housing and the cover plate are sealed by a second seal, and a third seal is provided between the cover plate and the bushing for sealing. Thus, when the magnetic recycling machine is running, the bushing, as a transition part, can become a wear point. Compared with the wear point appearing directly on the magnetic roller shaft, this makes it easier to replace later and reduces costs. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the sealing structure of this utility model and its installation structure with the magnetic recovery machine;

[0019] Figure 2 This is a schematic diagram of the cover plate structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the bushing structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the skeleton oil seal and its structure.

[0022] In the diagram: 1-cover plate, 2-shaft sleeve, 3-first seal, 4-second seal, 5-third seal; 6-box body, 7-magnetic roller shaft, 11-small hole, 12-large hole, 13-second annular groove, 21-through hole, 22-first annular groove, 51-outer ring skeleton, 52-rubber oil seal, 53-self-tightening helical spring. Detailed Implementation

[0023] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figure 1 As shown, a sealing structure for a magnetic recycling machine is installed on the outside of the housing 6 of the magnetic recycling machine. The magnetic roller shaft 7 of the magnetic recycling machine passes through the housing 6 and extends to the outside of the housing 7. The sealing structure includes a bushing 2 that fits and is sleeved on the outside of the magnetic roller shaft 7. A cover plate 1 is fixed on the outside of the housing 6. A first sealing element 3 is installed between the bushing 2 and the magnetic roller shaft 7, and a second sealing element 4 is installed between the cover plate 1 and the housing 6 to improve the sealing performance.

[0025] like Figure 2 and Figure 3 As shown, a small hole 11 is provided on the side of the cover plate 1 near the housing 6, and a large hole 12 is provided on the side of the cover plate 1 away from the housing 6. The large hole 12 and the small hole 11 are coaxial and connected. The bushing 2 passes through the large hole 12 and extends into the small hole 11, and the bushing 2 and the small hole 11 cooperate with each other. There is an annular gap between the bushing 2 and the large hole 12. A third sealing element 5 is installed in the annular gap, thereby achieving the sealing between the bushing 2 and the cover plate 1.

[0026] During the operation of the magnetic recycling machine, the rotation of the magnetic roller shaft 7 drives the bushing 2 to rotate synchronously, thus becoming a rotating component. During long-term use, when a small amount of water or magnetic powder flows out, the position on the bushing 2 that contacts the third seal 5 becomes a wear point. When the wear point on the outside of the bushing 2 is severely worn, the bushing 2 can be removed and replaced by stopping the machine.

[0027] In the existing technology, the bushing 2 is not used as a transition part, that is, the third seal 5 is in direct contact with the magnetic roller shaft 7. This makes the contact point between the magnetic roller shaft 7 and the third seal 5 a wear point. During long-term use, the magnetic roller shaft 7 needs to be replaced after wear. However, the magnetic roller shaft 7 is a one-piece structure, and the replacement process is complicated and costly. In this embodiment, the problem of seal wear can be solved by replacing the bushing 2, which saves costs and is convenient to operate.

[0028] In this embodiment, the third seal 5 is a skeleton oil seal; such as Figure 4 As shown, the skeleton oil seal includes an outer ring skeleton 51 and a rubber oil seal 52 located in the inner ring. A self-tightening helical spring 53 is sleeved on the outer side of the rubber oil seal 52. The rubber oil seal 52 is sleeved on the bushing 2. The outer ring skeleton 51 is interference-fitted with the large hole 12 on the cover plate 1. The self-tightening helical spring 53 provides radial tightening force to the rubber oil seal 52, compensating for the reduction in tightening force caused by aging or wear of the rubber oil seal 52, thereby helping to maintain the sealing performance of the rubber oil seal 52.

[0029] In this embodiment, both the first sealing element 3 and the second sealing element 4 are O-rings; in other embodiments, the first sealing element 3 may also be a flat washer.

[0030] In this embodiment, a second annular groove 13 is provided on the side of the cover plate 1 near the housing 6, and the first seal is installed in the second annular groove 13; a first annular groove 21 is provided on the inner ring of the bushing 2, and the second seal 4 is installed in the first annular groove 21.

[0031] In this embodiment, the cover plate 1 is fixed to the outside of the box 6 by bolt connection. In other embodiments, the cover plate 1 can also be fixed to the box 6 by welding.

[0032] In this embodiment, the bushing 2 and the magnetic roller shaft 7 are detachably fixed by bolt connection, facilitating the disassembly and replacement of the bushing 2 later; specifically, as follows... Figure 2 As shown, a through hole 21 is provided on the bushing 2, and the through hole 21 penetrates the bushing 2 radially. A threaded hole is provided on the magnetic roller shaft 7 accordingly. A bolt is provided in the through hole 21, and the bolt passes through the through hole 21 and is screwed into the threaded hole, thereby realizing the bolt connection between the bushing 7 and the magnetic roller shaft 7.

[0033] Working principle:

[0034] By fitting a bushing 2 on the outside of the magnetic roller shaft 7 and fixing a cover plate 1 on the outside of the housing 6, the bushing 2 and the magnetic roller shaft 7 are sealed by a first seal 3, the housing 6 and the cover plate 1 are sealed by a second seal 4, and a third seal 5 is provided between the cover plate 1 and the bushing 2 for sealing; thus, when the magnetic recycling machine is running, the bushing 2 can become a wear point as a transition part, which is more convenient for later replacement and reduces costs compared to the wear point appearing directly on the magnetic roller shaft 7.

[0035] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A sealing structure for a magnetic recycling machine, installed on the outside of the housing (6) of the magnetic recycling machine, wherein the magnetic roller shaft (7) of the magnetic recycling machine passes through the housing (6) and extends to the outside of the housing (7); characterized in that, The sealing structure includes a bushing (2) fitted on the outside of the magnetic roller shaft (7), and a cover plate (1) fixed on the outside of the housing (6); a first sealing element (3) is installed between the bushing (2) and the magnetic roller shaft (7), and a second sealing element (4) is installed between the cover plate (1) and the housing (6); The cover plate (1) has a small hole (11) and a large hole (12) on the side close to and away from the box body (6), respectively. The large hole (12) and the small hole (11) are coaxial and connected. The bushing (2) passes through the large hole (12) and extends into the small hole (11), and cooperates with the small hole (11). An annular gap is formed between the bushing (2) and the large hole (12), and a third sealing element (5) is installed in the annular gap.

2. The sealing structure of a magnetic recovery machine according to claim 1, characterized in that, The third sealing element (5) is a skeleton oil seal.

3. The sealing structure of a magnetic recovery machine according to claim 2, characterized in that, The skeleton oil seal includes an outer ring skeleton (51) and a rubber oil seal (52) located in the inner ring. A self-tightening helical spring (53) is sleeved on the outer side of the rubber oil seal (52). The rubber oil seal (52) is sleeved on the bushing (2). The outer ring skeleton (51) is interference-fitted with the large hole (12) on the cover plate (1). The self-tightening helical spring (53) provides radial tightening force for the rubber oil seal (52) and makes the rubber oil seal (52) fit tightly against the bushing (2).

4. The sealing structure of a magnetic recovery machine according to claim 1, characterized in that, Both the first sealing element (3) and the second sealing element (4) are O-rings.

5. A sealing structure for a magnetic recovery machine according to claim 1 or 4, characterized in that, The cover plate (1) has a second annular groove (13) on the side near the box body (6), and the second sealing element (4) is installed in the second annular groove (13).

6. A sealing structure for a magnetic recovery machine according to claim 1 or 4, characterized in that, The inner ring of the bushing (2) has a first annular groove (22), and the second seal (4) is installed in the first annular groove (22).

7. The sealing structure of a magnetic recovery machine according to claim 1, characterized in that, The cover plate (1) is fixed to the outside of the box body (6) by bolts.

8. The sealing structure of a magnetic recovery machine according to claim 1, characterized in that, The bushing (2) is connected to the magnetic roller shaft (7) by bolts.

9. The sealing structure of a magnetic recovery machine according to claim 8, characterized in that, The bushing (2) has a through hole (21) that passes through the bushing (2) radially. The magnetic roller shaft (7) has a corresponding threaded hole. A bolt is installed in the through hole (21) and passes through the through hole (21) and is screwed into the threaded hole.

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