Lower support structure of spiral classifier

Abstract

The utility model belongs to the field of classification equipment, and discloses a lower support structure of a spiral classifier, which comprises a shaft head, a bearing seat and a bearing bush, the shaft head penetrates through the bearing seat and is in running fit with the bearing bush in the bearing seat, and the bearing seat is mounted on a lifting mechanism; a blind hole is formed in the center of the end of the shaft head, and a plurality of vent holes communicated with the blind hole are formed in the outer wall, located in the installation area of the bearing seat, of the shaft head. The blind hole is in threaded connection with a connecting pipe, the connecting pipe is connected with an air pipe through a swivel joint, and the air pipe is connected with a compressed air source. According to the utility model, a compressed air source can be introduced into the shaft head and discharged from a gap between the shaft head and the bearing bush, so that positive pressure is formed between the shaft head and the support, ore pulp can be prevented from entering the support, and the service lives of the shaft head and the bearing bush can be prolonged; meanwhile, air between the shaft head and the bearing bush can reduce friction force between the shaft head and the bearing bush, and abrasion of the shaft head and the bearing bush can be effectively reduced.

Description

Technical Field

[0001] The utility model belongs to the field of grading equipment, in particular to a lower support structure of a spiral classifier. Background Art

[0002] The spiral classifier is a grading equipment that uses gravity sedimentation to perform mechanical grading. It is widely used in the particle size classification of slurry in the metal beneficiation process, and can also be used for desludging and dehydration in ore washing operations, as well as for the treatment of slag. Since the lower support of the spiral classifier is completely submerged in the slurry, the working environment is harsh, and it is easy for the slurry to enter the support, causing serious wear of the bearing and the shaft head. Therefore, the lower support needs to be replaced frequently, which seriously affects the production progress.

[0003] Based on this, the present application provides a lower support structure of a spiral classifier with a longer service life, which can effectively prevent slurry from entering the support and causing wear to the shaft head and bearing. Utility Model Content

[0004] The utility model aims to solve the problem in the prior art that slurry enters the support and causes serious wear on the shaft head and bearing. To this end, the utility model provides a lower support structure of a spiral classifier with a longer service life, which can effectively prevent slurry from entering the support and causing wear on the shaft head and bearing.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] Provided is a lower support structure of a spiral classifier, comprising a shaft head, a bearing seat and a bearing bush, wherein the shaft head passes through the bearing seat and rotatably cooperates with the bearing bush in the bearing seat, and the bearing seat is installed on a lifting mechanism; a blind hole is provided at the center of the end of the shaft head, and a plurality of vents connected to the blind hole are provided on the outer wall of the installation area of ​​the shaft head located in the bearing seat; a connecting pipe is screwed to the blind hole, the connecting pipe is connected to an air pipe through a swivel joint, and the air pipe is connected to a compressed air source.

[0007] In a preferred embodiment, the shaft head is also provided with a fixed limit retaining ring and a movable limit retaining ring, the fixed limit retaining ring is welded to the shaft head, the movable limit retaining ring is threadedly connected to the shaft head, and the bearing seat is arranged between the fixed limit retaining ring and the movable limit retaining ring.

[0008] In a preferred embodiment, sealing rings are further provided between the fixed limit retaining ring and the movable limit retaining ring and the end surface of the bearing seat, and the two sealing rings are respectively embedded in the grooves of the fixed limit retaining ring and the movable limit retaining ring.

[0009] In a preferred embodiment, a pressure gauge is also provided on the air pipe.

[0010] Preferably, the bearing bushing in the above embodiment is made of nylon.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. The utility model can pass the compressed air source into the shaft head and discharge it from the gap between the shaft head and the bearing bush, so that a positive pressure is formed between the shaft head and the support, which is conducive to preventing the slurry from entering the support, thereby extending the service life of the shaft head and the bearing bush; at the same time, the air between the shaft head and the bearing bush can reduce the friction between the shaft head and the bearing bush, which can effectively reduce the wear of the shaft head and the bearing bush;

[0013] 2. The fixed limit retaining ring and the movable limit retaining ring can limit the support, and the setting of the sealing ring can further prevent the slurry from entering the support. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0015] Figure 1 It is a cross-sectional view of the lower support structure of the spiral classifier provided by the utility model;

[0016] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0017] 1—shaft head, 1.1—blind hole, 1.2—vent hole, 2—bearing seat, 3—bearing shell, 4—connecting pipe, 5—swivel joint, 6—air pipe, 7—fixed limit retaining ring, 8—movable limit retaining ring, 9—sealing ring, 10—pressure gauge. DETAILED DESCRIPTION

[0018] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] In the description of the present utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model; the terms "install", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal connection of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0021] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0022] Embodiment: This embodiment provides a lower support structure of a spiral classifier, as shown in the attached Figure 1 As shown, it includes a shaft head 1, a bearing seat 2 and a bearing shell 3. The shaft head 1 passes through the bearing seat 2 and rotates with the bearing shell 3 in the bearing seat 2. There is a gap between the shaft head and the bearing shell. In order to increase the service life of the bearing shell, the bearing shell 3 of this embodiment is preferably a nylon bearing shell, that is, a bearing shell made of nylon material. The bearing seat 2 is installed on a lifting mechanism (not shown in the figure). The lifting mechanism can adjust the angle of the spiral shaft. This structure is the existing technology of the spiral classifier and will not be described here.

[0023] In order to solve the problem of wear on the shaft head and bearing bush caused by slurry entering the support, in this embodiment, a blind hole 1.1 is drilled at the center of the end of the shaft head 1, and the outer wall of the shaft head 1 located in the installation area of ​​the bearing seat 2 is provided with a plurality of vents 1.2 connected to the blind hole 1.1, and the blind hole 1.1 is screwed with a connecting pipe 4, and the connecting pipe 4 is connected to the air pipe 6 through a rotary joint 5, and the air pipe 6 is connected to a compressed air source, which is generated by an air compressor, and the function of the rotary joint is to prevent the air pipe from winding around the pipe. In this embodiment, compressed air is introduced into the shaft head, and discharged from the gap between the shaft head and the bearing bush through the vent, so that a positive pressure is formed between the shaft head and the support, which is conducive to preventing the slurry from entering the support, thereby extending the service life of the shaft head and the bearing bush; at the same time, the air between the shaft head and the bearing bush can reduce the friction between the shaft head and the bearing bush, which can effectively reduce the wear of the shaft head and the bearing bush. In addition, the use of bearing bushes instead of bearings facilitates the inspection and replacement of the support, saving time.

[0024] Preferably, the plurality of vent holes 1.2 are staggered to prevent affecting the strength of the shaft head.

[0025] Furthermore, in this embodiment, a fixed limit retaining ring 7 and a movable limit retaining ring 8 are provided on the shaft head 1, wherein the fixed limit retaining ring 7 is welded to the shaft head 1, the movable limit retaining ring 8 is screwed to the shaft head 1, and the bearing seat 2 is provided between the fixed limit retaining ring 7 and the movable limit retaining ring 8. In this embodiment, the fixed limit retaining ring and the movable limit retaining ring are used to limit the support.

[0026] Preferably, a sealing ring 9 is further provided between the fixed limit retaining ring 7 and the movable limit retaining ring 8 and the end surface of the bearing seat 2, and the two sealing rings are respectively embedded in the grooves of the fixed limit retaining ring and the movable limit retaining ring. The setting of the sealing ring can further prevent the slurry from entering the support.

[0027] Preferably, a pressure gauge 10 is also provided on the air pipe 6, and the positive pressure value in the support can be determined by the pressure gauge, so as to facilitate the pressure adjustment of the compressed air.

[0028] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A lower support structure of a spiral classifier, comprising a shaft head, a bearing seat and a bearing bush, wherein the shaft head passes through the bearing seat and rotates with the bearing bush in the bearing seat, and the bearing seat is installed on a lifting mechanism; characterized in that: A blind hole is provided at the center of the end of the shaft head, and a plurality of vent holes communicating with the blind hole are provided on the outer wall of the shaft head in the mounting area of ​​the bearing seat; The blind hole is screwed with a connecting pipe, the connecting pipe is connected to an air pipe through a swivel joint, and the air pipe is connected to a compressed air source.

2. The lower support structure of the spiral classifier according to claim 1, characterized in that: The shaft head is also provided with a fixed limit retaining ring and a movable limit retaining ring, the fixed limit retaining ring is welded to the shaft head, the movable limit retaining ring is screwed to the shaft head, and the bearing seat is arranged between the fixed limit retaining ring and the movable limit retaining ring.

3. The lower support structure of the spiral classifier according to claim 2, characterized in that: A sealing ring is also provided between the fixed limit retaining ring, the movable limit retaining ring and the end surface of the bearing seat, and the two sealing rings are respectively embedded in the grooves of the fixed limit retaining ring and the movable limit retaining ring.

4. The lower support structure of the spiral classifier according to claim 3, characterized in that: The air pipe is also provided with a pressure gauge.

5. The lower support structure of the spiral classifier according to claim 1, characterized in that: The bearing bush is made of nylon.

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