Impeller casing with copper lining

Abstract

The invention relates to the field of impeller casing materials, and discloses an impeller casing with a copper lining, the impeller casing comprises an impeller casing outer cylinder plate, impeller casing supporting strips are arranged on the inner wall of the impeller casing outer cylinder plate, and an impeller casing inner cylinder plate is fixedly connected to the interiors of the impeller casing supporting strips; an asbestos-free rubber plate is fixedly connected to the inner wall of the impeller case inner cylinder plate, a copper plate is fixedly connected to the inner wall of the asbestos-free rubber plate, an access door is arranged on one side of the copper plate, the asbestos-free rubber plate and the impeller case inner cylinder plate, and access door pressing strips are arranged on the two sides of the outer wall of the access door. The asbestos-free rubber plate and the copper plate are arranged in the fan impeller casing, so that the problem that an inner barrel of the impeller casing is corroded by the environment to generate corrosion residues to influence the running efficiency of the fan and the potential safety hazard of blades is solved; and meanwhile, the risk of sparks caused by friction between turbine blades and an inner barrel of a turbine shell due to long-time operation of the fan is eliminated.

Description

Technical Field

[0001] The invention relates to the technical field of impeller casing materials, in particular to an impeller casing with a copper lining. Background Art

[0002] The impeller casing is an outer shell structure that provides installation space and support protection for the impeller. It is an important component of the impeller machinery. An impeller casing with a copper lining is a mechanical component that is based on the traditional impeller casing and has a copper lining installed inside or at a specific location through a specific process.

[0003] Common large-scale mining fans usually use carbon steel as the inner wall of the impeller casing. Ordinary carbon steel is prone to rust and corrosion in the mine environment, producing rust slag. In addition, since the impeller blades are in motion and the gap between the blades and the inner cylinder of the impeller casing determines the fan energy efficiency, the rust slag will damage the impeller blades, resulting in serious consequences such as shutdown. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides an impeller casing with a copper lining to solve the problem that rust residue is generated in the inner cylinder of the traditional impeller casing, damaging the impeller blades and causing the risk of downtime.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: an impeller casing with a copper lining, comprising an impeller casing outer cylinder plate, the inner wall of the impeller casing outer cylinder plate is provided with an impeller casing support strip, the interior of the impeller casing support strip is fixedly connected to the impeller casing inner cylinder plate, the inner wall of the impeller casing inner cylinder plate is fixedly connected to an asbestos-free rubber plate, the inner wall of the asbestos-free rubber plate is fixedly connected to a copper plate, an inspection door is provided on one side of the copper plate, the asbestos-free rubber plate and the impeller casing inner cylinder plate, inspection door strips are provided on both sides of the outer wall of the inspection door, pressure blocks are symmetrically provided on one side of the impeller casing outer cylinder plate, a strip body is provided on the side of the inspection door strip away from the inspection door, threaded sleeves are symmetrically provided inside the strip body, bolts are threadedly connected to the inner wall of the threaded sleeves, and anti-slip nuts are provided in the middle of the bolts.

[0006] Preferably, a handle is fixedly connected to the middle of the outer wall of the inspection door, the bottom of the anti-slip nut is in conflict with the top outer wall of the pressure strip body, and an impeller casing flange is provided at one end of the impeller casing support bar.

[0007] Preferably, the outer wall of the outer cylinder plate of the impeller casing is evenly fixedly connected with a vertical plate, the bottom of the bolt is in conflict with the inspection door molding, and the tops of both sides of the molding body are in conflict with the bottom of the pressure block.

[0008] The asbestos-free rubber sheet comprises the following raw materials in parts by weight: 40-60 parts of rubber base material, 5-25 parts of talc, 5-15 parts of dolomite, 3-10 parts of gypsum, 5-10 parts of mica, 2-10 parts of nano silicon dioxide, 2-10 parts of nano calcium, 1-5 parts of carbon fiber, 2-10 parts of polyester fiber, 2-10 parts of glass fiber, 1-5 parts of aramid fiber, 1-5 parts of vulcanizing agent and 3-8 parts of additives.

[0009] Preferably, the rubber substrate is one or more combinations of natural rubber, styrene-butadiene rubber, nitrile rubber, ethylene-propylene rubber, chloroprene rubber, fluororubber, and silicone rubber.

[0010] Preferably, the additive is one or more combinations of antioxidants, anti-aging agents, softeners, flame retardants, and UV inhibitors.

[0011] The method for preparing the asbestos-free rubber sheet comprises the following steps: S1. Preheating: The rubber substrate is heated by a microwave heating device to a temperature of 30°C-35°C, and the additive is preheated by oil bath heating. The heated rubber substrate and the additive are then put into an internal mixer for plasticization at a temperature of about 40°C-60°C for 10 minutes-20 minutes. S2, first mixing: stir nano silicon dioxide and nano calcium by high-speed stirrer, add dispersing aid at the same time, stirring speed is 1000-2000 rpm, time is 5 minutes-10 minutes, and then add them into internal mixer; add talcum powder, dolomite, gypsum and mica at the same time for mixing, mixing temperature is 80 ℃-100 ℃, mixing time is 15 minutes-30 minutes, and disperse and mix by ultrasonic oscillation equipment, ultrasonic frequency is 20kHz-30kHz; S3, second mixing: then adding polyester fiber, glass fiber, and aramid fiber for mixing, the mixing temperature is 100°C-120°C, the mixing time is 5 minutes-10 minutes, and then adding carbon fiber and fiber dispersant for further mixing, the mixing temperature is 100°C-120°C, and the mixing time is 20 minutes-30 minutes, thereby obtaining a substrate; S4, molding: the base material is calendered by a calendering machine, and the calendering temperature is 80°C-100°C, thereby obtaining a rubber sheet base material; S5, vulcanization: placing the rubber sheet substrate into a vulcanization device for vulcanization at a vulcanization temperature of 140°C to 180°C for a vulcanization time of 10 minutes to 30 minutes, thereby obtaining a rubber sheet; S6. Cooling and treatment: The surface temperature of the rubber sheet is reduced to 60℃-70℃ by air cooling equipment, and then the temperature is reduced to 25℃-30℃ by water cooling equipment. The cooled rubber sheet is then cut, and the edges are polished and coated with sealant to obtain an asbestos-free rubber sheet.

[0012] Preferably, the preheating of the additives in step S1 includes the preheating temperature of antioxidants and anti-aging agents being 50°C-60°C, the preheating temperature of softeners being 60°C-70°C, the preheating temperature of flame retardants and anti-ultraviolet agents being 70°C-80°C, and the time being 5 minutes-10 minutes. The amount of the dispersing aid in step S2 is 1%-2% of the total weight of nano-silicon dioxide and nano-calcium. The amount of the fiber dispersant in step S3 is 0.5%-1% of the total weight of polyester fiber, glass fiber, aramid fiber and carbon fiber.

[0013] Working principle: When in use, by setting the asbestos-free rubber plate inside the inner cylinder plate of the impeller casing, the corrosion resistance and high temperature resistance of the casing are improved. The copper plate is connected to the inner cylinder plate of the impeller casing through the asbestos-free rubber plate 4, so that when the casing is in use, it can prevent the blades from rubbing against the inner cylinder plate of the impeller casing during high-speed operation to generate sparks, and further enhance the corrosion resistance of the casing. During subsequent maintenance, by turning the bolt, it moves up and down inside the threaded sleeve, thereby driving the pressure strip body to move up and down, so that the inspection door is limited by the pressure strip body, so as to facilitate the inspection of the casing.

[0014] The present invention provides an impeller casing with a copper lining, which has the following beneficial effects: 1. The present invention provides an asbestos-free rubber plate and a copper plate inside the impeller casing of the fan, thereby solving the problem that the inner cylinder of the impeller casing is corroded by the environment to produce rust residues that affect the operating efficiency of the fan and the safety hazards of the blades; at the same time, it also eliminates the risk of sparks generated by the friction between the impeller blades and the inner cylinder of the impeller casing due to the long-term operation of the fan; it ensures the safe operation of the fan and extends the service life of the fan, thereby solving the problem that the inner cylinder of the traditional impeller casing produces rust residues that damage the impeller blades and cause the risk of shutdown.

[0015] 2. The present invention arranges an inspection door on one side of the copper plate, the asbestos-free rubber plate, and the inner cylinder plate of the impeller casing, and rotates the bolt to make it move up and down inside the threaded sleeve, thereby driving the pressure strip body to move up and down, so that the inspection door can be limited by the pressure strip body, thereby facilitating the inspection of the casing, thereby enhancing the practicality of the casing.

[0016] 3. The present invention enhances the strength and hardness of the rubber sheet by adding nano-silicon dioxide and nano-calcium, and the nano-level particles can better combine with the rubber substrate, fill the gaps between rubber molecules, make the rubber sheet denser, and improve its tensile and tear resistance. By adding fiber materials, the strength and toughness of the rubber sheet can be significantly improved, and a reinforced network structure is formed in the rubber matrix to resist deformation under the action of external forces, effectively enhancing the tensile strength and impact resistance of the rubber sheet. Therefore, the asbestos-free rubber sheet has the effects of good physical properties and strong chemical stability, thereby enhancing its practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the local structure of the impeller casing flange of the present invention; Figure 2 It is a schematic diagram of the partial structure of the outer cylinder plate of the impeller casing of the present invention; Figure 3 It is a schematic diagram of the partial structure of the handle of the present invention; Figure 4 It is a schematic diagram of the partial structure of the impeller casing support bar of the present invention; Figure 5 It is a schematic diagram of the local structure of the layering strip body of the present invention; Figure 6 The present invention provides a method flow chart for preparing the asbestos-free rubber sheet.

[0018] Among them, 1. vertical plate; 2. impeller casing outer cylinder plate; 3. copper plate; 4. asbestos-free rubber plate; 5. impeller casing inner cylinder plate; 6. impeller casing flange; 7. handle; 8. impeller casing support bar; 9. pressure block; 10. pressure bar body; 11. inspection door pressure bar; 12. bolt; 13. threaded sleeve; 14. inspection door; 15. anti-slip nut. DETAILED DESCRIPTION

[0019] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments 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 creative work are within the scope of protection of the present invention. Example

[0020] Please see attached Figure 1 -Attached Figure 5The embodiment of the present invention provides an impeller casing with a copper lining, including an impeller casing outer cylinder plate 2, an impeller casing support strip 8 is provided on the inner wall of the impeller casing outer cylinder plate 2, an impeller casing inner cylinder plate 5 is fixedly connected inside the impeller casing support strip 8, an asbestos-free rubber plate 4 is fixedly connected to the inner wall of the impeller casing inner cylinder plate 5, a copper plate 3 is fixedly connected to the inner wall of the asbestos-free rubber plate 4, an inspection door 14 is provided on one side of the copper plate 3, the asbestos-free rubber plate 4, and the impeller casing inner cylinder plate 5, inspection door strips 11 are provided on both sides of the outer wall of the inspection door 14, a pressure block 9 is symmetrically provided on one side of the impeller casing outer cylinder plate 2, and the inspection door strip 11 is fixedly connected to the inner wall of the impeller casing inner cylinder plate 5. A pressure strip body 10 is provided on the side away from the inspection door 14, and a threaded sleeve 13 is symmetrically provided inside the pressure strip body 10. The internal thread of the threaded sleeve 13 is connected with a bolt 12, and an anti-slip nut 15 is provided in the middle of the bolt 12; a handle 7 is fixedly connected to the middle of the outer wall of the inspection door 14, and the bottom of the anti-slip nut 15 is in conflict with the top outer wall of the pressure strip body 10, and an impeller casing flange 6 is provided at one end of the impeller casing support bar 8; the outer wall of the impeller casing outer cylinder plate 2 is evenly fixedly connected with a vertical plate 1, the bottom of the bolt 12 is in conflict with the inspection door pressure strip 11, and the tops of both sides of the pressure strip body 10 are in conflict with the bottom of the pressure block 9.

[0021] Specifically, the impeller casing outer cylinder plate 2 is connected to the impeller casing inner cylinder plate 5 by the impeller casing support bar 8. The asbestos-free rubber plate 4 has good sealing performance, and at the same time has good mechanical strength and tensile strength, and is not easy to break and deform. By arranging the asbestos-free rubber plate 4 inside the impeller casing inner cylinder plate 5, the corrosion resistance and high temperature resistance of the casing are improved when in use, thereby enhancing the service life of the casing. Moreover, it does not contain asbestos, so it is harmless to the human body and meets modern environmental protection and health requirements; the copper plate 3 has strong corrosion resistance and wear resistance. The copper plate 3 is connected to the impeller casing inner cylinder plate 5 by the asbestos-free rubber plate 4, so that when the casing is in use, it can prevent the blades from rubbing against the impeller casing inner cylinder plate 5 during high-speed operation to generate sparks, and further enhance the corrosion resistance of the casing, thereby solving the problem that the traditional impeller casing inner cylinder produces rust residue to damage the impeller blades and cause the risk of shutdown.

[0022] By setting an inspection door 14 on one side of the copper plate 3, the asbestos-free rubber plate 4, and the inner cylinder plate 5 of the impeller casing, and rotating the bolt 12 to make it move up and down inside the threaded sleeve 13, the pressure strip body 10 is driven to move up and down, so that the inspection door 14 can be limited by the pressure strip body 10, thereby facilitating the inspection of the casing, thereby enhancing the practicality of the casing.

[0023] The asbestos-free rubber sheet comprises the following raw materials in parts by weight: 40-60 parts of rubber base material, 5-25 parts of talc, 5-15 parts of dolomite, 3-10 parts of gypsum, 5-10 parts of mica, 2-10 parts of nano silicon dioxide, 2-10 parts of nano calcium, 1-5 parts of carbon fiber, 2-10 parts of polyester fiber, 2-10 parts of glass fiber, 1-5 parts of aramid fiber, 1-5 parts of vulcanizing agent, and 3-8 parts of additives; the rubber base material is one or more combinations of natural rubber, styrene-butadiene rubber, nitrile rubber, ethylene-propylene rubber, chloroprene rubber, fluororubber, and silicone rubber; the additive is one or more combinations of antioxidants, anti-aging agents, softeners, flame retardants, and anti-ultraviolet agents.

[0024] Specifically, the rubber substrate is used as the main matrix material to provide the rubber sheet with elasticity, flexibility and basic physical properties, so that it can withstand a certain amount of pressure and deformation, and at the same time provide an attachment basis for other additives and fillers; the addition of talcum powder, dolomite, gypsum, and mica mainly plays a filling role, which can increase the volume of the rubber sheet, reduce the cost, and improve the hardness, wear resistance and other physical properties of the rubber sheet, and can also improve the heat resistance and dimensional stability of the rubber sheet to a certain extent; the addition of nano-silicon dioxide and nano-calcium can enhance the strength and hardness of the rubber sheet, and the nano-scale particles can better combine with the rubber substrate, fill the gaps between rubber molecules, make the rubber sheet denser, and improve Its tensile and tear resistance; through the addition of carbon fiber, polyester fiber, glass fiber, and aramid fiber, these fiber materials can significantly improve the strength and toughness of the rubber sheet, and form a reinforced network structure in the rubber matrix to resist deformation under external force, and effectively enhance the tensile strength and impact resistance of the rubber sheet; through the addition of vulcanizing agent, the rubber base material undergoes a vulcanization reaction, and the linear rubber molecules are cross-linked to form a three-dimensional network structure, thereby improving the comprehensive properties of the rubber sheet such as strength, elasticity, wear resistance and aging resistance; so that the asbestos-free rubber sheet has the effect of good physical properties and strong chemical stability, thereby enhancing its practicality; and it can be used on the impeller casing with copper lining to enhance its service life.

[0025] Please see attached Figure 6 The method for preparing an asbestos-free rubber sheet comprises the following steps: S1. Preheating: The rubber substrate is heated by a microwave heating device to a temperature of 30°C-35°C, and the additive is preheated by oil bath heating. The heated rubber substrate and the additive are then put into an internal mixer for plasticization at a temperature of about 40°C-60°C for 10 minutes-20 minutes. S2, first mixing: stir nano silicon dioxide and nano calcium by high-speed stirrer, add dispersing aid at the same time, stirring speed is 1000-2000 rpm, time is 5 minutes-10 minutes, and then add them into internal mixer; add talcum powder, dolomite, gypsum and mica at the same time for mixing, mixing temperature is 80 ℃-100 ℃, mixing time is 15 minutes-30 minutes, and disperse and mix by ultrasonic oscillation equipment, ultrasonic frequency is 20kHz-30kHz; S3, second mixing: then adding polyester fiber, glass fiber, and aramid fiber for mixing, the mixing temperature is 100°C-120°C, the mixing time is 5 minutes-10 minutes, and then adding carbon fiber and fiber dispersant for further mixing, the mixing temperature is 100°C-120°C, and the mixing time is 20 minutes-30 minutes, thereby obtaining a substrate; S4, molding: the base material is calendered by a calendering machine, and the calendering temperature is 80°C-100°C, thereby obtaining a rubber sheet base material; S5, vulcanization: placing the rubber sheet substrate into a vulcanization device for vulcanization at a vulcanization temperature of 140°C to 180°C for a vulcanization time of 10 minutes to 30 minutes, thereby obtaining a rubber sheet; S6. Cooling and treatment: The surface temperature of the rubber sheet is reduced to 60℃-70℃ by air cooling equipment, and then the temperature is reduced to 25℃-30℃ by water cooling equipment. The cooled rubber sheet is then cut, and the edges are polished and coated with sealant to obtain an asbestos-free rubber sheet.

[0026] The preheating of the additives in step S1 includes the preheating temperature of antioxidants and anti-aging agents being 50°C-60°C, the preheating temperature of softeners being 60°C-70°C, the preheating temperature of flame retardants and anti-ultraviolet agents being 70°C-80°C, and the time being 5 minutes-10 minutes. The amount of the dispersing aid in step S2 is 1%-2% of the total weight of nano-silicon dioxide and nano-calcium. The amount of the fiber dispersant in step S3 is 0.5%-1% of the total weight of polyester fiber, glass fiber, aramid fiber and carbon fiber.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An impeller casing with a copper lining, comprising an impeller casing outer cylinder plate (2), characterized in that: The inner wall of the impeller casing outer cylinder plate (2) is provided with an impeller casing support bar (8), the interior of the impeller casing support bar (8) is fixedly connected to the impeller casing inner cylinder plate (5), the inner wall of the impeller casing inner cylinder plate (5) is fixedly connected to an asbestos-free rubber plate (4), the inner wall of the asbestos-free rubber plate (4) is fixedly connected to a copper plate (3), and one side of the copper plate (3), the asbestos-free rubber plate (4) and the impeller casing inner cylinder plate (5) is provided with an inspection door (14). Inspection door moldings (11) are arranged on both sides of the outer wall of the inspection door (14); a pressure block (9) is symmetrically arranged on one side of the outer cylinder plate (2) of the impeller casing; a molding body (10) is arranged on the side of the inspection door molding (11) away from the inspection door (14); a threaded sleeve (13) is symmetrically arranged inside the molding body (10); a bolt (12) is connected to the inner thread of the threaded sleeve (13); and an anti-slip nut (15) is arranged in the middle of the bolt (12).

2. The impeller housing with copper lining according to claim 1, characterized in that: A handle (7) is fixedly connected to the middle of the outer wall of the inspection door (14), the bottom of the anti-slip nut (15) abuts against the top outer wall of the pressure strip body (10), and an impeller casing flange (6) is provided at one end of the impeller casing support strip (8).

3. The impeller housing with copper lining according to claim 1, characterized in that: The outer wall of the impeller casing outer cylinder plate (2) is evenly fixedly connected with the vertical plate (1), the bottom of the bolt (12) abuts against the inspection door pressure strip (11), and the tops of both sides of the pressure strip body (10) abut against the bottom of the pressure block (9).

4. Asbestos-free rubber sheet, characterized by: An impeller casing with a copper lining as described in any one of claims 1 to 3, comprising the following raw materials in parts by weight: 40-60 parts of a rubber base material, 5-25 parts of talc, 5-15 parts of dolomite, 3-10 parts of gypsum, 5-10 parts of mica, 2-10 parts of nano-silicon dioxide, 2-10 parts of nano-calcium, 1-5 parts of carbon fiber, 2-10 parts of polyester fiber, 2-10 parts of glass fiber, 1-5 parts of aramid fiber, 1-5 parts of a vulcanizing agent, and 3-8 parts of an additive.

5. The asbestos-free rubber sheet according to claim 4, characterized in that: The rubber substrate is one or more combinations of natural rubber, styrene-butadiene rubber, nitrile rubber, ethylene-propylene rubber, chloroprene rubber, fluororubber and silicone rubber.

6. The asbestos-free rubber sheet according to claim 4, characterized in that: The additive is one or more combinations of antioxidants, anti-aging agents, softeners, flame retardants, and anti-ultraviolet agents.

7. A method for preparing an asbestos-free rubber sheet, characterized in that: The asbestos-free rubber sheet according to any one of claims 4 to 6 comprises the following steps: S1. Preheating: The rubber substrate is heated by a microwave heating device to a temperature of 30°C-35°C, and the additive is preheated by oil bath heating. The heated rubber substrate and the additive are then put into an internal mixer for plasticization at a temperature of about 40°C-60°C for 10 minutes-20 minutes. S2, first mixing: stir nano silicon dioxide and nano calcium by high-speed stirrer, add dispersing aid at the same time, stirring speed is 1000-2000 rpm, time is 5 minutes-10 minutes, and then add them into internal mixer; add talcum powder, dolomite, gypsum and mica at the same time for mixing, mixing temperature is 80 ℃-100 ℃, mixing time is 15 minutes-30 minutes, and disperse and mix by ultrasonic oscillation equipment, ultrasonic frequency is 20kHz-30kHz; S3, second mixing: then adding polyester fiber, glass fiber, and aramid fiber for mixing, the mixing temperature is 100°C-120°C, the mixing time is 5 minutes-10 minutes, and then adding carbon fiber and fiber dispersant for further mixing, the mixing temperature is 100°C-120°C, and the mixing time is 20 minutes-30 minutes, thereby obtaining a substrate; S4, molding: the base material is calendered by a calendering machine, and the calendering temperature is 80°C-100°C, thereby obtaining a rubber sheet base material; S5, vulcanization: placing the rubber sheet substrate into a vulcanization device for vulcanization at a vulcanization temperature of 140°C to 180°C for a vulcanization time of 10 minutes to 30 minutes, thereby obtaining a rubber sheet; S6. Cooling and treatment: The surface temperature of the rubber sheet is reduced to 60℃-70℃ by air cooling equipment, and then the temperature is reduced to 25℃-30℃ by water cooling equipment. The cooled rubber sheet is then cut, and the edges are polished and coated with sealant to obtain an asbestos-free rubber sheet.

8. The method for preparing the asbestos-free rubber sheet according to claim 7, characterized in that: The preheating of the additives in step S1 includes the preheating temperature of antioxidants and anti-aging agents at 50°C-60°C, the preheating temperature of softeners at 60°C-70°C, the preheating temperature of flame retardants and anti-ultraviolet agents at 70°C-80°C, and the time is 5 minutes-10 minutes. The amount of the dispersing aid in step S2 is 1%-2% of the total weight of nano-silicon dioxide and nano-calcium. The amount of the fiber dispersant in step S3 is 0.5%-1% of the total weight of polyester fiber, glass fiber, aramid fiber and carbon fiber.

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