Sealing air pipe of coal mill

Abstract

The utility model relates to the technical field of coal mills, in particular to a coal mill sealing air pipe which comprises a discharging channel, an air blower, a filter screen, a first sealing ring and a second sealing ring, the air blower is installed at one end of the top of the discharging channel, the filter screen is arranged at one end of the air blower, the first sealing ring is arranged on one side of the filter screen, and the second sealing ring is arranged on the other side of the filter screen. A metal hose connector is arranged at the other end of the top of the discharging channel by forming an air inlet, a second sealing ring is arranged between the metal hose connector and the air inlet, an air conveying pipe is connected between the air blower and the metal hose connector, and an air blowing cover is fixed to the inner top of the discharging channel. According to the utility model, two groups of sealing parts are used for sealing and protecting the air pipe, so that the connecting stability of the filter screen and the metal hose joint can be effectively enhanced, the phenomenon of coal powder leakage is prevented, the sealing effect is improved, and the sealing device is suitable for being widely popularized and used.

Description

TECHNICAL FIELD

[0001] The utility model relates to coal mill technical field, concretely relates to a coal mill sealing air pipe. BACKGROUND

[0002] The coal mill is the machinery that will be broken and ground into coal powder, is the important auxiliary equipment of coal powder furnace, is generally installed with the air pipe at the outlet position of coal mill, and the air pipe is mainly used for conveying the coal powder produced in the coal grinding process, therefore the air pipe needs to have good sealing property to avoid the waste resource and the pollution environment phenomenon due to the coal powder leakage.

[0003] At present, when the air pipe is installed, the single sealing structure is prone to the leakage phenomenon of the coal powder ground into powder, and the sealing effect is not very good, therefore a coal mill sealing air pipe is provided, which can use two groups of sealing components to seal and protect the air pipe to prevent the leakage phenomenon of the coal powder, thereby improving the sealing effect. SUMMARY

[0004] In view of the problems in the prior art, the utility model provides a coal mill sealing air pipe, which can use two groups of sealing components to seal and protect the air pipe to prevent the leakage phenomenon of the coal powder, thereby improving the sealing effect.

[0005] The utility model discloses a coal mill sealing air pipe that the technical scheme that the utility model solves its technical problem is a kind of coal mill sealing air pipe, including discharge passage, air blower, filter screen, one sealing ring and two sealing rings, the discharge passage top one end is installed with air blower, the air blower one end is provided with filter screen, the filter screen one side is provided with one sealing ring;

[0006] The other end of the discharge passage top is provided with metal hose joint by setting air inlet, two sealing rings are provided between the metal hose joint and the air inlet, the air blower is connected with metal hose joint between the air blower and the metal hose joint, the inner top of the discharge passage is fixed with the air blower cover, and the metal hose joint is communicated with the air blower cover.

[0007] By adopting the above technical scheme, when air is inhaled, personnel connect the air outlet end of air blower with the metal hose joint outside air inlet using air conveying pipe, and the two sealing rings between the metal hose joint and the air inlet can effectively enhance the sealing property and stability between the metal hose joint and the air inlet, avoid the leakage phenomenon of air at the connecting place, not only can maintain higher gas conveying efficiency, but also can effectively prevent the leakage phenomenon of coal powder;

[0008] The filter screen can filter and purify the air outside before the air enters the air blower, so that the air outside can enter the air blower in a clean state, the first sealing ring can effectively enhance the stability of the filter screen when being connected with the first connecting plate, and the phenomenon of loosening of the filter screen is avoided, and after the air is filtered, impurities outside can be prevented from mixing into the discharging channel along with the air, and the purity of the pulverized coal can be effectively improved.

[0009] Specifically, the outer side of the filter screen is provided with a first fastening screw, the outer side of the first connecting plate is provided with a fastening nut, and bolt holes are formed in the filter screen, the first connecting plate and the first sealing ring.

[0010] By adopting the above technical scheme, the filter screen, the first connecting plate and the first sealing ring can be fastened and connected through the first fastening screw, the bolt hole and the fastening nut.

[0011] Specifically, one end of the discharging channel is connected with a coal mill discharging port, and the discharging channel is connected with the coal mill discharging port through the second connecting plate and the second fastening screw.

[0012] By adopting the above technical scheme, the pulverized coal output by the coal mill discharging port can enter the discharging channel.

[0013] Specifically, one side of the air blower is connected with an air blower air inlet pipe, one side of the air blower air inlet pipe is connected with a first connecting plate, and the first sealing ring is located between the filter screen and the first connecting plate.

[0014] By adopting the above technical scheme, the filter screen and the first connecting plate can clamp the first sealing ring, and the first sealing ring can enhance the stability of the filter screen when being connected.

[0015] Specifically, a guide block is arranged on one side of the blowing cover at the inner top of the discharging channel.

[0016] By adopting the above technical scheme, the guide block can guide the air blown out by the blowing cover, and the contact time of the air and the pulverized coal can be effectively prolonged.

[0017] Specifically, the first sealing ring and the second sealing ring are both made of nitrile rubber material.

[0018] The beneficial effects of the utility model are as follows:

[0019] The air blower air inlet pipe disclosed by the utility model is connected with the air outlet end of the air blower and the metal hose joint outside the air inlet through the air inlet pipe when air enters, the second sealing ring between the metal hose joint and the air inlet can effectively enhance the sealing property and stability between the metal hose joint and the air inlet, and the phenomenon of air leakage at the connection position is avoided.

[0020] The coal mill sealing duct of this utility model allows the filter screen to filter and purify the outside air before it enters the blower, ensuring that the outside air enters the blower in a clean state. The No. 1 sealing ring effectively enhances the stability of the connection between the filter screen and the No. 1 connecting plate, preventing the filter screen from becoming loose. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the No. 1 sealing ring structure of this utility model;

[0024] Figure 3 This is a schematic diagram of the No. 2 sealing ring structure of this utility model;

[0025] Figure 4 This is a cross-sectional view of the present invention.

[0026] In the diagram: 1. Discharge channel; 2. Blower; 3. Filter screen; 4. Air conveying pipe; 5. Coal mill discharge port; 6. No. 1 connecting plate; 7. No. 1 fastening screw; 8. Air inlet; 9. Blower air inlet pipe; 10. No. 2 connecting plate; 11. No. 2 fastening screw; 12. No. 1 sealing ring; 13. Fastening nut; 14. Metal hose connector; 15. No. 2 sealing ring; 16. Blower hood; 17. Guide block; 18. Bolt hole. Detailed Implementation

[0027] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0028] In order to use two sets of sealing components to seal and protect the air duct and prevent coal powder leakage, thereby improving the sealing effect, such as Figures 1-4 As shown, the coal mill sealing air duct of this utility model includes a discharge channel 1, a blower 2, a filter screen 3, a first sealing ring 12 and a second sealing ring 15. The blower 2 is installed at one end of the top of the discharge channel 1, the filter screen 3 is provided at one end of the blower 2, and the first sealing ring 12 is provided on one side of the filter screen 3.

[0029] At the other end of the top of the discharge channel 1, a metal hose connector 14 is provided through an air inlet 8. A second sealing ring 15 is provided between the metal hose connector 14 and the air inlet 8. An air supply pipe 4 is connected between the blower 2 and the metal hose connector 14. A blower hood 16 is fixed to the inner top of the discharge channel 1. The metal hose connector 14 is connected to the blower hood 16.

[0030] When in use, during air intake, personnel use the air supply pipe 4 to connect the air outlet of the blower 2 to the metal hose connector 14 on the outside of the air inlet 8. The second sealing ring 15 between the metal hose connector 14 and the air inlet 8 can effectively enhance the sealing and stability between the metal hose connector 14 and the air inlet 8, and prevent air leakage at the connection. It can not only maintain a high air supply efficiency, but also effectively prevent coal powder leakage.

[0031] Before air enters the blower 2, the filter screen 3 can filter and purify the outside air, so that the outside air can enter the blower 2 in a clean state. The first sealing ring 12 can effectively enhance the stability of the connection between the filter screen 3 and the first connecting plate 6, and prevent the filter screen from becoming loose. After filtering the air, it can prevent external impurities from entering the discharge channel 1 with the air, and can effectively improve the purity of coal powder.

[0032] To improve the sealing effect, for example, such as Figure 2 As shown, a fastening screw 7 is provided on the outer side of the filter screen 3, a fastening nut 13 is provided on the outer side of the connecting plate 6, and bolt holes 18 are provided on the filter screen 3, the connecting plate 6 and the sealing ring 12.

[0033] During use, the filter screen 3, the connecting plate 6 and the sealing ring 12 can be fastened together by the first fastening screw 7, the bolt hole 18 and the fastening nut 13.

[0034] For example, such as Figure 1 , Figure 4 As shown, one end of the discharge channel 1 is connected to the coal mill discharge port 5, and the discharge channel 1 is connected to the coal mill discharge port 5 through the second connecting plate 10 and the second fastening screw 11.

[0035] When in use, this method facilitates the entry of pulverized coal from the pulverizer outlet 5 into the discharge channel 1.

[0036] For example, such as Figure 1 , Figure 2 As shown, a blower inlet pipe 9 is connected to one side of the blower 2, and a first connecting plate 6 is connected to one side of the blower inlet pipe 9. The first sealing ring 12 is located between the filter screen 3 and the first connecting plate 6.

[0037] When in use, the filter screen 3 and the first connecting plate 6 can clamp the first sealing ring 12, and the first sealing ring 12 can enhance the stability of the filter screen 3 connection.

[0038] For example, such as Figure 4 As shown, a guide block 17 is provided on the inner top of the discharge channel 1, located on one side of the blower hood 16.

[0039] When in use, the guide block 17 can guide the air blown out by the blower hood 16, which can effectively prolong the contact time between the air and the coal powder.

[0040] For example, such as Figure 2 , Figure 3 As shown, both the first sealing ring 12 and the second sealing ring 15 are made of nitrile rubber.

[0041] When in use, the guide block 17 can guide the air blown out by the blower hood 16, which can effectively prolong the contact time between the air and the coal powder.

[0042] When this utility model is in use, if it is necessary to transport pulverized coal, the personnel use the air duct 4 to connect the air outlet of the blower 2 to the metal hose connector 14 on the outside of the air inlet 8. The second sealing ring 15 between the metal hose connector 14 and the air inlet 8 can effectively enhance the sealing and stability between the metal hose connector 14 and the air inlet 8, and prevent air leakage at the connection. It can not only maintain a high gas transmission efficiency, but also effectively prevent pulverized coal leakage.

[0043] Before air enters the blower 2, the filter screen 3 can filter and purify the outside air, so that the outside air can enter the blower 2 in a clean state. The first sealing ring 12 can effectively enhance the stability of the connection between the filter screen 3 and the first connecting plate 6, and prevent the filter screen from becoming loose. After filtering the air, it can prevent external impurities from entering the discharge channel 1 with the air, and can effectively improve the purity of coal powder.

[0044] 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 descriptions of the above embodiments and specifications 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 protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A seal air duct for a coal mill, characterised in that, Including the discharge channel (1), air blower (2), filter screen (3), a connecting plate (6), a sealing ring (12) and a second sealing ring (15), the discharge channel (1) top one end is mounted with air blower (2), one end of air blower (2) is provided with filter screen (3), one side of filter screen (3) is provided with a sealing ring (12); The other end of the discharge channel (1) top is provided with a metal hose joint (14) through the opening air inlet (8), the metal hose joint (14) and air inlet (8) are provided with a second sealing ring (15), the air blower (2) and metal hose joint (14) are connected with the air pipe (4), the inner top of the discharge channel (1) is fixed with the blowing cover (16), the metal hose joint (14) and blowing cover (16) are communicated.

2. A seal air duct for a coal mill as claimed in claim 1, wherein, The outer side of the filter screen (3) is provided with a fastening screw (7), the outer side of the connecting plate (6) is provided with a fastening nut (13), the filter screen (3), the connecting plate (6) and the sealing ring (12) are all provided with bolt holes (18).

3. A seal air duct for a coal mill as claimed in claim 1, wherein, One end of the discharge channel (1) is connected with the coal mill discharge port (5), the discharge channel (1) is connected with the coal mill discharge port (5) through the second connecting plate (10) and the second fastening screw (11).

4. A seal air duct for a coal mill as claimed in claim 1, wherein, One side of the air blower (2) is connected with the air blower air inlet pipe (9), one side of the air blower air inlet pipe (9) is connected with the connecting plate (6), the sealing ring (12) is located between the filter screen (3) and the connecting plate (6).

5. A seal air duct for a coal mill as claimed in claim 1, wherein, The inner top of the discharge channel (1) is provided with a flow guide block (17) on one side of the blowing cover (16).

6. A seal air duct for a coal mill as claimed in claim 1, wherein, The sealing ring (12) and the second sealing ring (15) are made of nitrile rubber material.

Images