Feeding sealing device for large overflow type mill

Abstract

The utility model provides a feeding sealing device for a large overflow type mill, and relates to the technical field of feeding sealing of mills. According to the feeding sealing device of the mill, an annular fixing disc is welded on a feeding pipe, and the annular fixing disc, an inflatable sealing ring and a pressing ring are fixed into a whole through bolts; a rubber sealing ring is fixed at the feeding end of the mill barrel through a bolt; after being inflated, the inflatable sealing ring expands in the radial direction to be tightly attached to the feeding pipe, and meanwhile after the inflatable sealing ring expands and extends in the axial direction, an annular concave-convex groove in the front end is embedded into an annular concave-convex groove of the rubber sealing ring to achieve the sealing effect; a water inlet hole is formed in the inflatable sealing ring, and high-pressure water enters the inflatable sealing ring and the concave-convex groove of the rubber sealing ring through the water inlet hole to play a sealing role; after the inflation sealing ring is inflated, vibration of the feeding pipe can be eliminated, abnormal abrasion of a sealing piece caused by vibration of the feeding pipe is eliminated, and a good sealing effect is achieved.

Description

Technical Field

[0001] The utility model provides a feeding sealing device for a large overflow mill, belonging to the technical field of mill feeding sealing. Background Technique

[0002] At present, there are many large non-ferrous metal mines in China, and large overflow mills are also widely used in the grinding process. In order to prevent the pulp in the mill from overflowing from the feeding pipe, generally a rubber sealing ring is used for contact sealing. Due to the action of centrifugal force and steel ball grinding force during the rotation of the mill, it is very difficult for a single sealing to achieve a sealing effect, resulting in pulp overflow and bringing many problems to the production site. Content of the Utility Model

[0003] The purpose of the utility model is to solve the problems existing in the above-mentioned prior art, and further provide a feeding sealing device for a large overflow mill. To achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0004] A feeding sealing device for a large overflow mill, a feeding pipe is arranged at the feeding end of the mill cylinder body, and the feeding sealing device of the mill includes: an annular fixed disk, an inflatable sealing ring, bolt one, a rubber sealing ring, a water inlet hole, bolt two, an inflation nozzle and a pressing ring;

[0005] The rubber sealing ring is sleeved on the feeding pipe and fixed at the port of the feeding end of the mill cylinder body through bolt two; an annular fixed disk is welded on the outer side of the feeding pipe, and the pressing ring fixes the inflatable sealing ring on the annular fixed disk through bolt one, and the opening of the pressing ring faces one side of the rubber sealing ring; the inflatable sealing ring is provided with a circular ring protrusion, and the protrusion passes through the opening of the pressing ring and contacts the rubber sealing ring. The top of the circular ring protrusion of the inflatable sealing ring is provided with three thin circular ring protrusions to form two annular grooves to cooperate with the two annular protrusions on the rubber sealing ring; an inflation nozzle is arranged on the outer side of the circular ring protrusion of the inflatable sealing ring, and the water inlet hole passes through the outermost protrusion among the three thin circular ring protrusions on the top of the inflatable sealing ring.

[0006] For the feeding sealing device of a large overflow mill of the utility model, the annular fixed disk is cut from a carbon steel plate with a thickness of 10 mm. 12 bolt holes with a diameter of 16 mm are evenly drilled on the annular fixed disk. The 12 bolt holes are divided into two groups and arranged on the circumferences with different radii on the annular fixed disk. The annular fixed disk is welded and fixed on the feeding pipe.

[0007] The present utility model relates to a feeding sealing device for a large overflow mill. The inflatable sealing ring is formed by molding high-quality rubber. There are three annular convex grooves at the front end, forming two annular grooves. The width of the convex part is 18 mm, the depth of the convex part is 18 mm, the width of the groove is 20 mm, and the depth of the groove is 20 mm. There are 12 bolt holes with a diameter of 16 mm on the end face of the inflatable sealing ring, and the inflation pressure is 0.4 Mpa - 0.5 Mpa.

[0008] The present utility model relates to a feeding sealing device for a large overflow mill. The rubber sealing ring is formed by molding high-quality rubber. There are two annular convex grooves. The width of the convex part in the convex groove is 18 mm and the depth is 18 mm. The width of the groove in the convex groove is 20 mm and the depth is 20 mm. There are 6 bolt holes with a diameter of 16 mm evenly arranged on the end face of the rubber sealing ring.

[0009] The present utility model relates to a feeding sealing device for a large overflow mill. The pressing ring is made of 6 mm thick stainless steel by welding. There are 12 holes with a diameter of 16 mm evenly arranged on the end face for installing the inflatable sealing ring. The 12 holes are divided into two groups and arranged on both sides of the opening of the pressing ring.

[0010] The present utility model relates to a feeding sealing device for a large overflow mill. The water inlet holes are arranged on the thin circular ring convex part on the outermost side of the inflatable sealing ring, and 4 water inlet holes with a diameter of 10 mm are vertically designed on the circumference of the thin circular ring convex part, evenly distributed at 90°. The water inlet pressure is 0.5 mpa.

[0011] The present utility model relates to a feeding sealing device for a large overflow mill. There is an inflation nozzle on the outer side of the circular ring convex part of the inflatable sealing ring. The beneficial effects of the present utility model are as follows:

[0012] The inflatable sealing ring of the feeding sealing device for a large overflow mill of the present utility model can eliminate the vibration of the feeding pipe through the inflatable sealing ring and the rubber sealing ring, reduce the abnormal wear of the inflatable sealing ring and the sealing ring; after the inflatable sealing ring exhausts air, it can automatically retract, which is convenient for disassembly and installation; the three seals can effectively control the overflow of pulp, with simple processing, low manufacturing cost, convenient installation, and reduced additional cost expenditure caused by dealing with slurry leakage. Description of the Drawings

[0013] Figure 1 It is a cross-sectional view of a feeding sealing device for a large overflow mill of the present utility model;

[0014] Figure 2 It is an overall structural schematic diagram of a feeding sealing device for a large overflow mill of the present utility model;

[0015] Figure 3 It is a specific structural schematic diagram of a feeding sealing device for a large overflow mill of the present utility model;

[0016] Figure 4 This is the front view of the rubber sealing ring in a feeding sealing device for a large overflow mill of the present utility model.

[0017] Figure 5 This is the front view of the annular fixing plate, inflatable sealing ring and pressing ring in a feeding sealing device for a large overflow mill of the present utility model.

[0018] In the figure: 1 is the feeding pipe; 2 is the feeding end of the mill cylinder; 3 is the annular fixing plate; 4 is the inflatable sealing ring; 5 is bolt 1; 6 is the rubber sealing ring; 7 is the water inlet hole; 8 is bolt 2; 9 is the air inflation nozzle; 10 is the pressing ring. Specific embodiments

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0020] Embodiment 1: As Figures 1-5 shown, a feeding sealing device for a large overflow mill, a feeding pipe is arranged at the feeding end of the mill cylinder, and the feeding sealing device of the mill includes: an annular fixing plate, an inflatable sealing ring, bolt 1, a rubber sealing ring, a water inlet hole, bolt 2, an air inflation nozzle and a pressing ring;

[0021] The rubber sealing ring is sleeved on the feeding pipe and fixed at the port of the feeding end of the mill cylinder through bolt 2; an annular fixing plate is welded on the outer side of the feeding pipe, and the pressing ring fixes the inflatable sealing ring on the annular fixing plate through bolt 1, and the opening of the pressing ring faces one side of the rubber sealing ring; the inflatable sealing ring is provided with a circular ring protrusion and the protrusion passes through the opening of the pressing ring to contact the rubber sealing ring, and three thin circular ring protrusions are arranged at the top of the circular ring protrusion of the inflatable sealing ring to form two annular grooves to cooperate with the two annular protrusions on the rubber sealing ring; an air nozzle is arranged on the outer side of the circular ring protrusion of the inflatable sealing ring, and the water inlet hole passes through the outermost protrusion among the three thin circular ring protrusions at the top of the inflatable sealing ring.

[0022] After compressed air is filled into the inflatable sealing ring through the air nozzle, it expands radially and fits tightly with the feeding pipe. At the same time, the inflatable sealing ring expands axially and extends. After extension, the two annular grooves at the front end of the inflatable sealing ring are embedded into the two annular protrusion circles of the rubber sealing ring to achieve two sealing effects; a water inlet hole is arranged on the inflatable sealing ring, and high-pressure water enters the concave and convex grooves in the gap between the inflatable sealing ring and the rubber sealing ring through the water inlet hole to achieve the third sealing effect.

[0023] When the device is installed, first fix the rubber sealing ring at the port of the feeding end of the mill cylinder through the second bolt, and then weld an annular fixing plate at the corresponding position on the feeding pipe. The corresponding position means that after installing the inflatable sealing ring on the annular fixing plate, it can contact and seal with the rubber sealing ring. Install the inflatable sealing ring and the pressing ring on the side of the annular fixing plate close to the rubber sealing ring through the first bolt. After installation, inflate the inflatable sealing ring through the inflation nozzle. When the groove at the top of the inflatable sealing ring matches the protrusion at the top of the rubber sealing ring, stop inflation; continuously inject water into the gap between the inflatable sealing ring and the rubber sealing ring through the water injection hole.

[0024] A feeding sealing device for a large overflow mill of the utility model, the annular fixing plate is cut from a carbon steel plate with a thickness of 10 mm, and 12 bolt holes with a diameter of 16 mm are evenly drilled on the annular fixing plate. The 12 bolt holes are divided into two groups and arranged on the circumferences with different radii on the annular fixing plate, and the annular fixing plate is welded and fixed on the feeding pipe.

[0025] A feeding sealing device for a large overflow mill of the utility model, the inflatable sealing ring is formed by molding high-quality rubber, and there are three annular convex grooves at the front end to form two annular grooves. The width of the protrusion is 18 mm, the depth of the protrusion is 18 mm, the width of the groove is 20 mm, and the depth of the groove is 20 mm; there are 12 bolt holes with a diameter of 16 mm on the end face of the inflatable sealing ring, and the inflation pressure is 0.4 Mpa - 0.5 Mpa. The positions of the 12 bolt holes on the end face of the inflatable sealing ring correspond to the positions of the 12 threaded holes on the annular fixing plate.

[0026] A feeding sealing device for a large overflow mill of the utility model, the rubber sealing ring is formed by molding high-quality rubber, and there are two annular protruding grooves. The width of the protrusion in the protruding groove is 18 mm and the depth is 18 mm, and the width of the groove in the protruding groove is 20 mm and the depth is 20 mm; 6 bolt holes with a diameter of 16 mm are evenly arranged on the end face of the rubber sealing ring.

[0027] In the concave and convex grooves of the feeding sealing device, the depth and width of the protruding part are both 18 mm, and the depth and width of the groove part are both 20 mm.

[0028] A feeding sealing device for a large overflow mill of the utility model, the pressing ring is made by welding 6 mm thick stainless steel, and 12 holes with a diameter of 16 mm are evenly arranged on the end face to install the inflatable sealing ring. The 12 holes are divided into two groups and arranged on both sides of the opening of the pressing ring.

[0029] There are 12 holes on the annular fixing plate, the inflatable sealing ring and the pressing ring. The 12 holes are divided into two groups and are respectively arranged on both sides of the opening of the pressing ring and are fixedly installed through bolts.

[0030] The utility model relates to a feeding sealing device for a large overflow mill. The water inlet holes are located on the thin circular ring protrusion at the outermost side of the inflatable sealing ring, and 4 water inlet holes with a diameter of 10 mm are vertically designed on the circumference of the thin circular ring protrusion, evenly distributed at 90°, and the water inlet pressure is 0.5 mpa.

[0031] The utility model relates to a feeding sealing device for a large overflow mill. A nozzle is arranged on the outer side of the circular ring protrusion of the inflatable sealing ring. When the feeding sealing device is installed and in use, it can be sealed by inflating through the inflation nozzle. When not in use, it can be deflated through the inflation nozzle and then disassembled and replaced.

[0032] Example 2: As Figures 1-5 shown, a feeding sealing device for a large overflow mill. An annular fixing plate is welded on the feeding pipe of the device, and the inflatable sealing ring is fixed on the annular fixing plate with bolts by a pressing ring; a rubber sealing ring is fixed on the feeding end of the mill cylinder with bolts; after the inflatable sealing ring is filled with compressed air through the nozzle, it expands radially and fits tightly with the feeding pipe. At the same time, the inflatable sealing ring expands axially and extends. After extension, two annular grooves at the front end of the inflatable sealing ring are embedded into two annular protrusion circles of the rubber sealing ring to achieve a double-sealing effect; water inlet holes are arranged on the inflatable sealing ring, and high-pressure water enters the concave-convex groove embedding gap between the inflatable sealing ring and the rubber sealing ring through the water inlet holes to achieve a third-sealing effect. Clear water is continuously injected through the water inlet holes to play a sealing role. Since water is continuously injected, there is always water in the gap between the inflatable sealing ring and the rubber sealing ring as the third-sealing, and the water flows out along the bottom of the feeding sealing device of the overflow mill.

[0033] As mentioned above, the above are only the preferred specific embodiments of the utility model. These specific embodiments are all different implementation manners based on the overall concept of the utility model, and the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the utility model should be covered within the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the protection scope of the claims.

Claims

1. A feeding sealing device for a large overflow mill, wherein a feeding pipe (1) is arranged at the feeding end (2) of the mill cylinder, characterized in that: The mill feed sealing device comprises: an annular fixed plate (3), an inflatable sealing ring (4), a first bolt (5), a rubber sealing ring (6), a water inlet hole (7), a second bolt (8), an inflating nozzle (9) and a pressure ring (10); The rubber sealing ring (6) is sleeved on the feed pipe (1) and fixed to the port of the feed end (2) of the mill cylinder by bolt 2 (8); an annular fixing plate (3) is welded on the outer side of the feed pipe (1); a pressure ring (10) fixes the inflatable sealing ring (4) on the annular fixing plate (3) by bolt 1 (5); the opening of the pressure ring (10) faces one side of the rubber sealing ring (6); a circular protrusion is provided on the inflatable sealing ring (4) and the protrusion passes through the opening of the pressure ring (10) and contacts the rubber sealing ring (6); three thin circular protrusions are provided on the top of the circular protrusion of the inflatable sealing ring (4) to form two annular grooves that match the two annular protrusions on the rubber sealing ring (6); an inflatable nozzle (9) is provided on the outer side of the circular protrusion of the inflatable sealing ring (4); and the water inlet hole (7) is provided through the outermost protrusion of the three thin circular protrusions on the top of the inflatable sealing ring (4).

2. The feed sealing device for a large overflow mill according to claim 1, characterized in that: The annular fixing plate (3) is cut from a carbon steel plate with a thickness of 10 mm. Twelve bolt holes with a diameter of 16 mm are evenly drilled on the annular fixing plate (3). The 12 bolt holes are divided into two groups and arranged on circles of different radii on the annular fixing plate (3). The annular fixing plate (3) is welded and fixed on the feed pipe (1).

3. The feed sealing device for a large overflow mill according to claim 1, characterized in that: The inflatable sealing ring (4) is formed by high-quality rubber compression molding, and is provided with three annular convex grooves at the front end to form two annular concave grooves, the width of the convex grooves is 18 mm, the depth of the convex grooves is 18 mm, the width of the concave grooves is 20 mm, and the depth of the concave grooves is 20 mm; the end face of the inflatable sealing ring (4) is provided with 12 bolt holes with a diameter of 16 mm, and the inflation pressure is 0.4Mpa-0.5Mpa.

4. The feed sealing device for a large overflow mill according to claim 1, characterized in that: The rubber The rubber sealing ring (6) is molded from high-quality rubber and is provided with two annular raised grooves, the width of the raised grooves is 18 mm and the depth is 18 mm, and the width of the grooves in the raised grooves is 20 mm and the depth is 20 mm; six bolt holes with a diameter of 16 mm are evenly arranged on the end surface of the rubber sealing ring (6).

5. The feed sealing device for a large overflow mill according to claim 1, characterized in that: The pressure ring (10) is made of 6 mm thick stainless steel by welding, and 12 holes with a diameter of 16 mm are evenly arranged on the end surface for mounting the inflatable sealing ring (4). The 12 holes are divided into two groups and arranged on both sides of the opening of the pressure ring (10).

6. The feed sealing device for a large overflow mill according to claim 1, characterized in that: The water inlet hole (7) is arranged on the outermost thin circular ring protrusion of the inflatable sealing ring (4), and four water inlet holes with a diameter of 10 mm are vertically designed on the circumference of the thin circular ring protrusion, evenly distributed at 90 degrees, and the water inlet pressure is 0.5 MPa.

7. The feed sealing device for a large overflow mill according to claim 1, characterized in that: An inflation nozzle (9) is arranged on the outer side of the circular protrusion of the inflatable sealing ring (4).

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