Coal mill sealing structure capable of preventing pulverized coal from being accumulated

Abstract

The utility model discloses a coal mill sealing structure capable of preventing pulverized coal from being accumulated, which comprises a main frame used for fixing the sealing structure; the air outlet pipe is used for discharging air, and the air outlet pipe is located in the main frame; the sealing structure further comprises a coal blocking mechanism which is located in the main frame and used for blocking pulverized coal. The sealing mechanism is located outside the air outlet pipe, and the sealing mechanism is used for sealing the main frame; the utility model relates to the technical field of coal mines, through the arrangement of the sealing mechanism, the soft cushion in the sealing mechanism is in contact with the blocking cushion in the coal blocking mechanism, and through air circulation in the soft cushion, the blocking cushion is forced to be in contact with the air outlet pipe all the time, so that the sealing performance is not influenced by vibration; the purpose of preventing pulverized coal from accumulating on the sealing structure of the coal mill is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mines, in particular to a coal mill sealing structure capable of preventing coal powder from piling up. Background Art

[0002] The hollow shaft at the inlet and outlet of the coal mill in the central storage pulverizing system and the large bearing of the coal mill are dynamic and static matching rotating devices. Due to the shaking of the ball mill during operation, the assembly clearance needs to be controlled at 20-30mm to prevent wear between the dynamic and static parts.

[0003] However, in the prior art, the coal mill will vibrate when it is working. Therefore, when the traditional equipment is performing sealing work, gaps will be generated in the sealing structure due to the vibration, resulting in poor sealing. At the same time, the traditional sealing structure cannot be installed quickly. Therefore, when installing the sealing mechanism, the coal mill needs to stop working. When a long time is wasted on the installation, the working efficiency of the coal mill is affected. Utility Model Content

[0004] In view of the deficiencies of the prior art, the technical solution adopted by the utility model to solve the technical problems is: a coal mill sealing structure capable of preventing coal powder from accumulating, comprising:

[0005] A main frame, wherein the main frame is used to fix the sealing structure;

[0006] An air outlet pipe, the air outlet pipe is used to discharge gas, and the air outlet pipe is located inside the main frame;

[0007] The sealing structure also includes:

[0008] A coal blocking mechanism, the coal blocking mechanism is located inside the main frame and is used to block coal powder;

[0009] A sealing mechanism, the sealing mechanism is located outside the air outlet pipe and is used to seal the main frame;

[0010] The sealing mechanism includes a cushion, the outer wall of which is fixedly connected to a fixing block and arranged in a circular array along the center axis of the cushion, a limiting hole is opened in the wall of the fixing block, the main frame is fixedly connected to a fixing ring by fixing bolts, the wall of the fixing ring is provided with fixing holes and arranged in a circular array along the center axis of the fixing ring, the outer wall of the cushion is fixedly connected to a sealing ring, and the sealing ring is attached to the outer wall of the fixing ring to prevent coal powder from entering.

[0011] Preferably, the outer wall of the sealing ring contacts the outer wall of the fixing ring, and the outer wall of the fixing ring contacts the outer wall of the main frame. The fixing ring is connected to the main frame by fixing bolts to fix the sealing structure.

[0012] Preferably, the coal blocking mechanism includes a blocking pad, the outer wall of which is fixedly connected to a limiting column and is arranged in a circular array along the central axis of the blocking pad, the side of the blocking pad away from the limiting column is fixedly connected to an inner blocking ring, and the side of the blocking pad close to the limiting column is fixedly connected to an outer blocking ring, and the inner and outer blocking rings are fitted to the air outlet pipe to block the coal powder.

[0013] Preferably, the outer wall of the retaining pad contacts the outer wall of the soft pad, and the outer wall of the inner retaining ring contacts the outer wall of the air outlet pipe, so that the retaining pad fits the soft pad to block the coal powder.

[0014] Preferably, the outer wall of the outer retaining ring contacts the outer wall of the air outlet pipe, the end of the limiting column away from the retaining pad is fixedly connected with a buckle, and a groove is provided in the limiting column.

[0015] Preferably, the outer wall of the buckle contacts the inner wall of the fixing block, and the outer wall of the fixing block contacts the outer wall of the stop pad, and the fixing block is clamped by the buckle to fix the stop pad.

[0016] The beneficial effects of the utility model are as follows:

[0017] 1. The utility model sets a sealing mechanism, and the soft pad in the sealing mechanism contacts the baffle in the coal baffle mechanism, and the air circulation in the soft pad forces the baffle to always contact the air outlet pipe, so that the sealing performance is not affected by vibration, thereby achieving the purpose of not being affected by the vibration of the equipment, and solving the problem that the sealing performance of traditional equipment is affected by vibration.

[0018] 2. The utility model sets up a coal blocking mechanism, and the buckles in the coal blocking mechanism cooperate with the limiting holes on the fixed block, and the blocking pad can be quickly fitted with the soft pad, thereby achieving the purpose of rapid installation of the coal blocking mechanism and the sealing mechanism, and solving the problem that traditional equipment cannot be quickly installed. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is the front view of the utility model;

[0020] Figure 2 It is a cross-sectional view of the utility model;

[0021] Figure 3 It is a structural schematic diagram of the sealing mechanism of the utility model;

[0022] Figure 4 It is a schematic diagram of the structure of the utility model at A;

[0023] Figure 5 It is a structural schematic diagram of the coal blocking mechanism of the utility model;

[0024] Figure 6 It is a structural schematic diagram of B of the utility model.

[0025] In the figure: 1. main frame; 2. air outlet pipe; 3. coal blocking mechanism; 31. blocking pad; 32. limiting column; 33. inner blocking ring; 34. outer blocking ring; 35. buckle; 4. sealing mechanism; 41. fixing ring; 42. fixing hole; 43. limiting hole; 44. soft pad; 45. sealing ring; 46. fixing block; 5. fixing bolt. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and design various embodiments with various modifications suitable for specific purposes.

[0027] Example:

[0028] See also Figure 1 - Figure 6 The utility model provides a technical solution: a coal mill sealing structure capable of preventing coal powder from accumulating, comprising:

[0029] Main frame 1, main frame 1 is used to fix the sealing structure;

[0030] An air outlet pipe 2, which is used to discharge gas and is located inside the main frame 1;

[0031] The sealing structure also includes:

[0032] A coal blocking mechanism 3, which is located inside the main frame 1 and is used to block coal powder;

[0033] A sealing mechanism 4, which is located outside the air outlet pipe 2 and is used to seal the main frame 1;

[0034] The sealing mechanism 4 includes a cushion 44, the outer wall of which is fixedly connected to a fixing block 46 and arranged in a circular array along the center axis of the cushion 44, a limiting hole 43 is opened in the wall of the fixing block 46, the main frame 1 is fixedly connected to a fixing ring 41 through a fixing bolt 5, a fixing hole 42 is opened in the wall of the fixing ring 41 and arranged in a circular array along the center axis of the fixing ring 41, the outer wall of the cushion 44 is fixedly connected to a sealing ring 45, the outer wall of the sealing ring 45 is in contact with the outer wall of the fixing ring 41, the outer wall of the fixing ring 41 is in contact with the outer wall of the main frame 1, and the cushion 44 is made of soft material.

[0035] The coal blocking mechanism 3 includes a blocking pad 31, the outer wall of which is fixedly connected to the limiting column 32 and is arranged in a circular array along the central axis of the blocking pad 31. The side of the blocking pad 31 away from the limiting column 32 is fixedly connected to an inner blocking ring 33, and the side of the blocking pad 31 close to the limiting column 32 is fixedly connected to an outer blocking ring 34. The outer wall of the blocking pad 31 contacts the outer wall of the soft pad 44, and the outer wall of the inner blocking ring 33 contacts the outer wall of the outlet pipe 2. The blocking pad 31 is also made of soft material.

[0036] The outer wall of the outer retaining ring 34 contacts the outer wall of the air outlet pipe 2, and the end of the limiting column 32 away from the retaining pad 31 is fixedly connected with a buckle 35, the outer wall of the buckle 35 contacts the inner wall of the fixed block 46, and the outer wall of the fixed block 46 contacts the outer wall of the retaining pad 31. The fixed block 46 is clamped by the buckle 35, so that the coal blocking mechanism 3 can be fixed on the sealing mechanism 4.

[0037] Working principle:

[0038] When in use, first fix the main frame 1, then install the sealing mechanism 4 on the main frame 1, and pass the fixing bolts 5 through the fixing holes 42 in the main frame 1 and the fixing ring 41, and tighten the nuts to fix the main frame 1 and the sealing mechanism 4 together. At the same time, install the coal blocking mechanism 3 through the air outlet pipe 2, and slide the coal blocking mechanism 3 on the surface of the air outlet pipe 2 to the bottom of the sealing mechanism 4, and then fit the blocking pad 31 in the coal blocking mechanism 3 into the soft pad 44 in the sealing mechanism 4.

[0039] After the blocking pad 31 and the soft pad 44 are fitted together, the limiting column 32 on the blocking pad 31 is aligned with the limiting hole 43 on the fixing block 46, and then the buckle 35 on the limiting column 32 is pressed into the limiting hole 43. At this time, the buckle 35 is deformed under the pressure of the pressing force and enters the limiting hole 43 after the deformation. After the buckle 35 completely enters the limiting hole 43, the buckle 35 is reset because there is no pressure from the limiting hole 43. At this time, the coal blocking mechanism 3 and the sealing mechanism 4 are fixed by the buckle 35.

[0040] When the coal blocking mechanism 3 is installed, an inner blocking ring 33 and an outer blocking ring 34 are fixed on the coal blocking mechanism 3, and the inner blocking ring 33 and the outer blocking ring 34 are attached to the air outlet pipe 2, so as to prevent coal powder from leaking out from the gap. At the same time, the coal mill will generate vibration when it is in operation, and because the soft pad 44 in the sealing mechanism 4 is made of soft material, when the coal mill vibrates, when the outer wall of the soft pad 44 is compressed, the air in the soft pad 44 will transport the air to the opposite side of the compression surface. At this time, due to the factor of the blocking pad 31, the blocking pad 31 is forced to always fit the surface of the air outlet pipe 2, and due to the factor of vibration, the coal powder accumulated on the sealing structure is forced to fall to the bottom while the soft pad 44 moves. At the same time, a sealing ring 45 is fixed on the surface of the soft pad 44, and the other end of the sealing ring 45 is attached to the surface of the fixed ring 41 to prevent coal ash from entering, thereby reducing the impact of coal powder accumulation on the sealing performance of the sealing structure.

[0041] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. Structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to conventional means in the field unless otherwise specified and limited.

Claims

1. A coal mill sealing structure capable of preventing coal powder from accumulating, comprising: A main frame (1), wherein the main frame (1) is used to fix the sealing structure; An air outlet pipe (2), the air outlet pipe (2) is used to discharge gas, and the air outlet pipe (2) is located inside the main frame (1); It is characterized in that The sealing structure also includes: A coal blocking mechanism (3), the coal blocking mechanism (3) being located inside the main frame (1), and the coal blocking mechanism (3) being used to block coal powder; A sealing mechanism (4), the sealing mechanism (4) being located outside the air outlet pipe (2), and the sealing mechanism (4) being used to seal the main frame (1); The sealing mechanism (4) comprises a soft pad (44), the outer wall of the soft pad (44) is fixedly connected to a fixing block (46) and is arranged in a ring array along the center axis of the soft pad (44), a limiting hole (43) is provided in the wall of the fixing block (46), the main frame (1) is fixedly connected to a fixing ring (41) through fixing bolts (5), a fixing hole (42) is provided in the wall of the fixing ring (41) and is arranged in a ring array along the center axis of the fixing ring (41), and a sealing ring (45) is fixedly connected to the outer wall of the soft pad (44).

2. A coal mill sealing structure capable of preventing coal powder from accumulating according to claim 1, Features: The outer wall of the sealing ring (45) contacts the outer wall of the fixing ring (41), and the outer wall of the fixing ring (41) contacts the outer wall of the main frame (1).

3. A coal mill sealing structure capable of preventing coal powder from accumulating according to claim 1, Features: The coal blocking mechanism (3) comprises a blocking pad (31), the outer wall of the blocking pad (31) is fixedly connected to a limiting column (32), and is arranged in a ring array along the central axis of the blocking pad (31); a side of the blocking pad (31) away from the limiting column (32) is fixedly connected to an inner blocking ring (33), and a side of the blocking pad (31) close to the limiting column (32) is fixedly connected to an outer blocking ring (34).

4. A coal mill sealing structure capable of preventing coal powder from accumulating according to claim 3, Features: The outer wall of the retaining pad (31) contacts the outer wall of the soft pad (44), and the outer wall of the inner retaining ring (33) contacts the outer wall of the air outlet pipe (2).

5. A coal mill sealing structure capable of preventing coal powder from accumulating according to claim 3, Features: The outer wall of the outer retaining ring (34) contacts the outer wall of the air outlet pipe (2), and one end of the limiting column (32) away from the retaining pad (31) is fixedly connected with a buckle (35).

6. A coal mill sealing structure capable of preventing coal powder from accumulating according to claim 5, Features: The outer wall of the buckle (35) contacts the inner wall of the fixing block (46), and the outer wall of the fixing block (46) contacts the outer wall of the stopper (31).

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