Special fan multi-stage sealing device for carbon black production line

Abstract

The utility model discloses a special fan multi-stage sealing device for a carbon black production line, and particularly relates to the technical field of carbon black fan sealing, which comprises a fan bearing, a gland is arranged outside the fan bearing, a connecting piece is arranged on one side of the gland, a sealing cavity for storing compressed air is arranged inside the connecting piece, and the sealing cavity is communicated with the gland. An end cover is arranged on one side of the connecting piece, the gland is tightly filled with graphite packing, and an oil seal rubber sealing ring is tightly installed in the end cover. According to the utility model, a multi-stage sealing effect on the carbon black fan can be achieved, tiny dust in waste gas is effectively prevented from escaping to cause pollution and safety accidents, and an operator can conveniently carry out installation and maintenance operation.

Description

Technical Field

[0001] The utility model relates to the technical field of carbon black fan sealing, and more specifically, to a multi-stage sealing device for a fan specially used in a carbon black production line. Background Art

[0002] Carbon black blowers are widely used in heat recovery, chemical industry, petroleum, metallurgy, forging, electric power, nuclear power plants, environmental protection and other fields.

[0003] Waste gas treatment in carbon black production lines is an important environmental protection issue. Carbon black tail gas is a flammable and toxic gas emitted during the carbon black production process. Its main components include CO, CO2, H2, N2, H20 hydrocarbons and a small amount of dust. Since it contains nearly 40% water and a large amount of dust, there is a risk of explosion when it leaks into the air, and it pollutes the environment. Therefore, the fan needs to overcome the harsh working environment without malfunctioning, and the carbon black fan needs to have a good sealing effect.

[0004] After searching, a Chinese patent with authorization announcement number CN204828018U discloses a carbon black production fan sealing device. This structure can effectively prevent the leakage of carbon black exhaust gas in the axial direction of the fan, protect the air environment of the enterprise factory area, and increase the power generation of carbon black production enterprises by recycling carbon black exhaust gas.

[0005] However, in actual use, this structure only uses graphite packing or sealing rings for sealing, which has poor sealing effect. In scenarios with large amounts of dust or exhaust gas, the sealing effect is limited, affecting the service life. In view of this, the utility model proposes a multi-stage sealing device for a fan dedicated to a carbon black production line. Utility Model Content

[0006] In order to overcome the above-mentioned defects of the prior art, the utility model provides a multi-stage sealing device for a blower specially used in a carbon black production line to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a multi-stage sealing device for a fan dedicated to a carbon black production line, comprising a fan bearing, a pressure cover is provided on the outside of the fan bearing, a connecting piece is provided on one side of the pressure cover, a sealing cavity for storing compressed air is provided inside the connecting piece, an end cover is provided on one side of the connecting piece, the interior of the pressure cover is tightly filled with graphite packing, and the interior of the end cover is tightly installed with an oil seal rubber ring, the pressure cover, graphite packing, connecting piece, end cover and oil seal rubber ring are all over-fitted with the fan bearing, and the connecting piece is installed between the pressure cover and the end cover.

[0008] It can be seen that in the above structure, the multi-stage sealing structure formed by the graphite packing inside the gland, the compressed air in the sealing cavity of the connector, and the oil seal rubber ring in the end cover effectively prevents dust from entering the outside of the fan housing during carbon black production.

[0009] In order to facilitate the injection of compressed air into the sealed cavity to which the connector belongs, preferably, the connector is a ring-shaped structure that is arranged through, and an injection head with a one-way valve is provided on the surface of the connector, and the injection head is connected to the sealed cavity.

[0010] In order to facilitate the installation of the connecting part between the pressure cover and the end cover, and to achieve the purpose of convenient disassembly and maintenance, preferably, the outside of the pressure cover and the end cover are fixedly installed with a first connecting plate, and both ends of the connecting part are fixedly provided with a second connecting plate, the first connecting plate and the second connecting plate have the same outer diameter and fit each other, the outer walls of the first connecting plate and the second connecting plate are circular and have multiple mounting holes, and the interior of the multiple mounting holes are threaded with bolts.

[0011] The technical effects and advantages of this utility model are:

[0012] 1. By tightly filling the gland with graphite packing, the end cap with oil seal rubber ring, and installing a connector between the gland and the end cap, and injecting compressed air into the sealing cavity of the connector through the injection head, the graphite packing is used as the first layer of sealing structure, the compressed air is used as the second layer of air seal structure, and the oil seal rubber ring is used as the last layer of oil seal structure, thereby achieving a multi-level sealing effect and effectively preventing the escape of tiny dust in the exhaust gas. The graphite packing is more heat-resistant and wear-resistant. In addition, the high-pressure gas continuously filled in the connector prevents the temperature from affecting the function and life of the oil seal rubber ring.

[0013] 2. The second connecting plates at both ends of the connecting piece are respectively docked with the first connecting plates on the gland and the end cover, and the docked first and second connecting plates are fixed by bolts, so that the connecting piece can be installed between the gland and the end cover. At the same time, it can be easily disassembled and maintained. The connecting piece not only provides a second layer of airtight structure, but also facilitates the connection between the gland and the end cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0015] Figure 2 This is a schematic diagram of the disassembled structure of the gland, connector and end cap of the present invention.

[0016] Figure 3 It is a schematic diagram of the surface structure of the gland of the present invention.

[0017] Figure 4 This is a schematic diagram of the surface structure of the connector of the present invention.

[0018] Figure 5 It is a schematic diagram of the surface structure of the end cover of the present utility model.

[0019] The accompanying drawings are marked as follows: 1. fan bearing; 2. pressure cover; 3. connecting part; 4. sealing chamber; 5. end cover; 6. graphite packing; 7. oil seal rubber sealing ring; 8. injection head; 9. first connecting plate; 10. second connecting plate; 11. mounting hole; 12. bolt. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] As attached Figure 1-5 The multi-stage sealing device for a fan dedicated to a carbon black production line shown in the figure includes a fan bearing 1, a pressure cover 2 is provided on the outside of the fan bearing 1, a connecting piece 3 is provided on one side of the pressure cover 2, a sealing cavity 4 for storing compressed air is provided inside the connecting piece 3, an end cover 5 is provided on one side of the connecting piece 3, the interior of the pressure cover 2 is tightly filled with graphite packing 6, and the interior of the end cover 5 is tightly installed with an oil seal rubber ring 7, the pressure cover 2, graphite packing 6, connecting piece 3, end cover 5 and oil seal rubber ring 7 are all over-fitted with the fan bearing 1, and the connecting piece 3 is installed between the pressure cover 2 and the end cover 5.

[0022] Specifically, the structure has a multi-level sealing effect, which greatly improves the sealing effect of the fan, prevents the escape of tiny dust in the exhaust gas, and blocks the carbon black dust in the fan housing;

[0023] Specifically, the interior of the gland 2 is filled with graphite packing 6, and the interior of the end cover 5 is filled with an oil-sealed rubber sealing ring 7. The connector 3 is located between the gland 2 and the end cover 5. The graphite packing 6 serves as the first layer of sealing structure and has good heat resistance and wear resistance, a long service life and good sealing effect. The sealing cavity 4 of the connector 3 is filled with compressed air as the second layer of sealing structure. The compressed air forms an air seal inside the connector 3, thereby effectively preventing carbon black dust from leaking into the air. The oil-sealed rubber sealing ring 7 filled inside the end cover 5 serves as the last layer of oil sealing structure and is made of a flexible self-lubricating rubber material. It fits tightly to the relevant parts of the fan housing and effectively prevents carbon black dust from entering the outside of the fan housing through the elasticity and self-lubricating properties of the rubber.

[0024] Furthermore, the structure adopts a multi-stage combination of graphite packing 6 packing seal, compressed air air seal in the connector 3 and oil seal of oil seal rubber ring 7, which effectively overcomes the escape of tiny dust in the exhaust gas. Among them, graphite packing 6 is more heat-resistant and wear-resistant, and the high-pressure gas continuously filled in the connector 3 ensures that the temperature does not affect the function and life of the oil seal rubber ring 7.

[0025] In a specific embodiment, as shown in the attached Figure 2 、 4 As shown, the connecting member 3 is a ring-shaped structure that is arranged through the connecting member 3. An injection head 8 with a one-way valve is provided on the surface of the connecting member 3. The injection head 8 is connected to the sealing cavity 4.

[0026] Specifically, in this structure, the injection head 8 with a one-way valve can inject compressed air into the sealed cavity 4 to which the connector 3 belongs, and avoid the backflow of compressed air. After the compressed air enters the sealed cavity 4 to which the connector 3 belongs, it can form a second layer of airtight barrier, thereby performing a secondary sealing process.

[0027] In a specific embodiment, as shown in the attached Figure 1-5 As shown, the outside of the pressure cover 2 and the end cover 5 are fixedly installed with a first connecting plate 9, and both ends of the connecting piece 3 are fixedly provided with a second connecting plate 10. The first connecting plate 9 and the second connecting plate 10 have the same outer diameter and fit each other. The outer walls of the first connecting plate 9 and the second connecting plate 10 are circular and have multiple mounting holes 11 through them. Bolts 12 are threadedly installed inside the multiple mounting holes 11.

[0028] Specifically, in this structure, the second connecting plates 10 at both ends of the connecting member 3 are docked with the first connecting plates 9 on the pressure cover 2 and the end cover 5 respectively, and the docked first connecting plates 9 and second connecting plates 10 are fixed by bolts 12, so that the connecting member 3 can be installed between the pressure cover 2 and the end cover 5. At the same time, it can be easily disassembled and maintained. The connecting member 3 not only serves as a second layer of airtight structure, but also facilitates the connection between the pressure cover 2 and the end cover 5.

[0029] Working principle of this utility model:

[0030] The present application provides a multi-stage sealing device for a blower dedicated to a carbon black production line. Since the exhaust gas from the carbon black production line contains a large amount of toxic gases and dust, the blower needs to be sealed when transporting the gas containing the carbon black raw material in the carbon black production line to avoid leakage that may cause shutdowns or safety accidents.

[0031] Furthermore, in this structure, the gland 2, the connector 3 and the end cover 5 are all installed on the outside of the fan bearing 1. The interior of the gland 2 is tightly filled with graphite packing 6, and the interior of the end cover 5 is tightly installed with an oil seal rubber ring 7. The second connecting plates 10 at both ends of the connector 3 are connected to the first connecting plates 9 on the gland 2 and the end cover 5 by bolts 12. An injection head 8 with a one-way valve is installed on the connector 3 for injecting compressed air into the sealing cavity 4 to which the connector 3 belongs, forming an air seal effect, thereby achieving a complete sealing structure.

[0032] First, the graphite packing 6 serves as the first sealing structure, the sealing cavity 4 of the connector 3 is filled with compressed air as the second sealing structure, and the oil seal rubber ring 7 filled inside the end cover 5 serves as the final oil seal structure. Furthermore, this structure uses a multi-stage combination of the graphite packing 6 packing seal, the compressed air seal in the connector 3, and the oil seal of the oil seal rubber ring 7 to effectively prevent the escape of tiny dust in the exhaust gas. The graphite packing 6 is more heat-resistant and wear-resistant, and the high-pressure gas continuously filled in the connector 3 ensures that the temperature does not affect the function and life of the oil seal rubber ring 7.

[0033] Since the second connection plates 10 at both ends of the connector 3 of this structure are connected to the first connection plates 9 on the gland 2 and the end cover 5 by bolts 12, subsequent disassembly and maintenance operations are convenient for operators.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A multi-stage sealing device for a blower specially used in a carbon black production line, comprising a blower bearing (1), characterized in that: A gland (2) is provided on the outside of the fan bearing (1), a connector (3) is provided on one side of the gland (2), a sealed cavity (4) for storing compressed air is provided inside the connector (3), and an end cover (5) is provided on one side of the connector (3); The interior of the gland (2) is tightly filled with graphite packing (6); An oil-sealing rubber sealing ring (7) is tightly installed inside the end cover (5).

2. The multi-stage sealing device for a carbon black production line fan according to claim 1, characterized in that: The connecting piece (3) is a ring-shaped structure that is arranged through the connecting piece (3). An injection head (8) with a one-way valve is arranged on the surface of the connecting piece (3). The injection head (8) is connected to the sealing cavity (4).

3. The multi-stage sealing device for a carbon black production line fan according to claim 1, characterized in that: A first connecting disk (9) is fixedly mounted on the outside of the gland (2) and the end cover (5), and a second connecting disk (10) is fixedly mounted on both ends of the connector (3). The first connecting disk (9) and the second connecting disk (10) have the same outer diameter and fit in contact with each other.

4. The multi-stage sealing device for a carbon black production line fan according to claim 3 is characterized in that: The outer walls of the first connecting plate (9) and the second connecting plate (10) are both circular and have a plurality of mounting holes (11) extending therethrough. Bolts (12) are threadedly installed inside the plurality of mounting holes (11).

5. The multi-stage sealing device for a carbon black production line fan according to claim 1, characterized in that: The gland (2), graphite packing (6), connector (3), end cover (5) and oil seal rubber ring (7) are all overfitted with the fan bearing (1), and the connector (3) is installed between the gland (2) and the end cover (5).

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