Feeding sealing structure of mill

Abstract

The utility model discloses a mill feed sealing structure which comprises a material pouring sleeve connected with a mill feed port, the material pouring sleeve comprises a first end plate, a cylinder and a second end plate which are coaxially arranged, an annular groove is defined by the first end plate, the cylinder and the second end plate, lifting plates are evenly distributed in the annular groove around the axis of the annular groove, and the lifting plates incline towards the rotating direction of a mill. When the mill rotates, the material pouring sleeve rotates along with the mill, and the lifting plate lifts materials from a low position to a certain height and then freely flows into a notch of a straight pipe section of the feeding bent pipe; the lifting plate is further provided with material blocking plates, the material blocking plates are arranged in the rotating direction of the mill, the multiple material blocking plates form a discontinuous inwards-concave conical face, a conical sleeve is arranged on the outer wall of the straight pipe section of the feeding bent pipe, and the conical sleeve corresponds to the conical face. According to the utility model, ore pulp leaked from a gap between the feeding hole of the mill and the feeding bent pipe can be fed into the mill again, so that the risk of slurry gathering and leakage at the position is reduced, the problem of slurry leakage is solved, and the sealing effect is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of mills, in particular to a feeding sealing structure of a mill. Background Art

[0002] There is a feeding method called elbow feeding in the existing wet ball mill. It is an elbow inserted into the feeding bushing at the feeding end of the mill. There is a semi-notch on the straight pipe section of the elbow. The ore to be ground and the added water enter the mill through the elbow. The feeding bushing rotates with the mill, and the elbow is fixed. Leakage of slurry often occurs in the gap between the outer cylindrical surface of the elbow and the feeding bushing of the mill. Due to the presence of sand grains, sealing is extremely difficult. There are various measures in the industry, but they are not ideal and need to be improved. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide a feeding sealing structure of a mill, which can lift the ore pulp leaking from the gap between the feeding port of the mill and the feeding elbow to a certain height along with the rotation of the mill cylinder and then pour it into the notch of the straight pipe section of the feeding elbow, and then send it into the mill again, reducing the accumulation of slurry here and the risk of material leakage, and also solving the problem of slurry leakage and ensuring the sealing effect, and can effectively solve the problems in the background art.

[0004] To achieve the above purpose, the utility model provides the following technical scheme: a feeding sealing structure of a mill, including a pouring sleeve connected to the feeding port of the mill. The pouring sleeve includes a first end plate, a cylinder body and a second end plate arranged coaxially. The axes of the first end plate and the second end plate are both provided with openings; the first end plate, the cylinder body and the second end plate enclose an annular groove, and lifting plates are evenly distributed in the annular groove around its axis. The lifting plates are inclined towards the rotation direction of the mill. When the mill rotates, the pouring sleeve rotates accordingly. The lifting plates lift the material to a certain height from a low place and then freely flow into the notch of the straight pipe section of the feeding elbow; the lifting plates are also provided with baffle plates, and the baffle plates are arranged towards the rotation direction of the mill. A plurality of baffle plates form an intermittently concave conical surface. A conical sleeve is arranged on the outer wall of the straight pipe section of the feeding elbow. The conical sleeve corresponds to the conical surface, and a sealing gasket is arranged between the contact surfaces of the conical sleeve and the conical surface.

[0005] Preferably, the conical sleeve is axially slidably matched with the straight pipe section of the feeding elbow. A sliding key is arranged on the outer wall of the straight pipe section of the feeding elbow, and a key groove adapted to the sliding key is arranged on the inner wall of the conical sleeve.

[0006] Preferably, a plurality of through holes are evenly distributed around the axis of the first end plate. Bolts pass through the through holes and are connected to the end face of the feeding port of the mill through nuts.

[0007] Preferably, a plurality of through holes are evenly distributed around the axis of the second end plate. Bolts pass through the through holes and are connected to the sealing gasket and the pressing ring through nuts.

[0008] Compared with the prior art, the beneficial effects of the present utility model are as follows: The pouring sleeve includes a first end plate, a cylinder body, a second end plate, and a lifting plate. When the mill rotates, the lifting plate rotates accordingly to lift the leaked pulp to a certain height and freely flow it into the notch of the straight pipe section of the feeding elbow, and then send it into the mill again, reducing the accumulation of slurry at the pouring sleeve and the risk of leakage; By arranging a sealing gasket between the tapered sleeve and the intermittently concave tapered surface, the leakage of slurry is avoided, and the problem of slurry leakage is solved. In addition, when the inner circle of the sealing gasket wears and becomes larger, the tapered surface of the tapered sleeve presses inward against the intermittently concave tapered surface to adjust the seal and ensure the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 is a schematic structural view of the present utility model;

[0010] Figure 2 is a schematic structural view of the pouring sleeve of the present utility model;

[0011] Figure 3 is a schematic partial structural view of the pouring sleeve of the present utility model;

[0012] Figure 4 is Figure 3 the front view of.

[0013] In the figure: 1 first end plate, 2 cylinder body, 3 second end plate, 4 lifting plate, 4.1 baffle plate, 5 tapered sleeve, 6 sealing gasket, 7 sliding key. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] The present utility model can be explained in detail through the following embodiments. The purpose of disclosing the present utility model is to protect all technical improvements within the scope of the present utility model. In the description of the present utility model, it should be understood that if there are terms such as "upper", "lower", "front", "rear", "left", "right", etc. indicating the orientation or positional relationship, it is only corresponding to the drawings of the present application for the convenience of describing the present utility model, rather than indicating or implying that the device or element referred to must have a specific orientation.

[0015] Please refer to Figures 1-4 , the present utility model provides the following technical solutions:

[0016] Embodiment 1: A mill feed sealing structure includes a material pouring sleeve connected to the mill feed inlet. The material pouring sleeve includes end plate 1, cylinder 2, and end plate 3 arranged coaxially. Both end plate 1 and end plate 3 have openings on their axes. End plate 1, cylinder 2, and end plate 3 enclose an annular groove. Lifting plates 4 are evenly distributed around the axis in the annular groove. The lifting plates 4 are inclined towards the rotation direction of the mill. When the mill rotates, the material pouring sleeve rotates accordingly. The lifting plates 4 lift the material to a certain height from a lower position and then freely flow into the notch of the straight pipe section of the feed elbow. The lifting plates 4 are also provided with baffle plates 4.1. The baffle plates 4.1 are arranged towards the rotation direction of the mill. Multiple baffle plates 4.1 form an intermittently concave conical surface. A tapered sleeve 5 is provided on the outer wall of the straight pipe section of the feed elbow. The tapered sleeve 5 corresponds to the conical surface, and a sealing gasket 6 is provided between the contact surfaces of the tapered sleeve 5 and the conical surface.

[0017] By arranging the lifting plates 4 in the cylinder 2, when the mill rotates, the cylinder 2 drives the lifting plates 4 to rotate. Then the lifting plates 4 lift the slurry to a certain height from a lower position and freely flow into the notch of the straight pipe section of the feed elbow, which can lift the ore pulp leaking from the gap between the mill feed inlet and the feed elbow to the straight pipe section of the feed elbow and send it back into the mill again, reducing the accumulation of slurry at the material pouring sleeve and the risk of leakage. In addition, by arranging the sealing gasket 6 between the tapered sleeve 5 and the intermittently concave conical surface, the leakage of slurry is avoided, and the problem of slurry leakage is solved. The baffle plates 4.1 can further prevent the slurry from falling during lifting and ensure the slurry capacity during lifting. When the inner circle of the sealing gasket 6 wears and becomes larger, the conical surface of the tapered sleeve 5 presses tightly against the intermittently concave conical surface inward, which can adjust the seal and ensure the sealing effect.

[0018] Embodiment 2: Different from Embodiment 1, the tapered sleeve 5 is axially slidably matched with the straight pipe section of the feed elbow. A sliding key is provided on the outer wall of the straight pipe section of the feed elbow, and a keyway adapted to the sliding key is provided on the inner wall of the tapered sleeve 5. The tapered sleeve 5 is connected to the mill feed elbow by a sliding key, which can prevent the tapered sleeve 5 from rotating with the sealing gasket 6 and wearing the outer circle of the mill feed elbow.

[0019] In addition, a plurality of through holes are evenly distributed around the axis of end plate 1. Bolts pass through the through holes and are connected to the end face of the mill feed inlet through nuts. A plurality of through holes are evenly distributed around the axis of end plate 3. Bolts pass through the through holes and are connected with a sealing gasket 6 and a retaining ring through nuts.

[0020] The parts not detailed in the present utility model are the prior art. For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive, aiming to include all changes falling within the meaning and scope of the equivalent elements in the content of the present utility model.

Claims

1. A mill feed sealing structure, characterized in that: The invention comprises a pouring sleeve connected to a feed port of a mill, wherein the pouring sleeve comprises a coaxially arranged end plate 1 (1), a cylinder (2) and a second end plate (3), and the axes of the end plate 1 (1) and the second end plate (3) are both provided with openings; the end plate 1 (1), the cylinder (2) and the second end plate (3) form an annular groove, and lifting plates (4) are evenly distributed in the annular groove around the axis thereof, and the lifting plates (4) are inclined toward the rotation direction of the mill. When the mill rotates, the pouring sleeve rotates with it, and the lifting plates (4) lift the material from a lower position to a certain height, and then the material freely flows into the straight pipe section slot of the feed elbow; the lifting plate (4) is also provided with a baffle plate (4.1), and the baffle plate (4.1) is arranged toward the rotation direction of the mill, and a plurality of baffle plates (4.1) form an intermittent concave conical surface, and a conical sleeve (5) is provided on the outer wall of the straight pipe section of the feed elbow, and the conical sleeve (5) corresponds to the conical surface, and a sealing gasket (6) is provided between the contact surface of the conical sleeve (5) and the conical surface.

2. A mill feed sealing structure according to claim 1, characterized in that: The cone sleeve (5) is axially slidably matched with the straight pipe section of the feed elbow; a sliding key (7) is provided on the outer wall of the straight pipe section of the feed elbow; and a keyway adapted to the sliding key (7) is provided on the inner wall of the cone sleeve (5).

3. A mill feed sealing structure according to claim 1, characterized in that: The end plate 1 (1) has a plurality of through holes evenly distributed around its axis, and bolts pass through the through holes and are connected to the end face of the mill feed port through nuts.

4. A mill feed sealing structure according to claim 1, characterized in that: The second end plate (3) has a plurality of through holes evenly distributed around its axis, and bolts pass through the through holes and are connected to the sealing gasket (6) and the pressure ring through nuts.

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