Positive pressure explosion-proof structure for centrifugal magnetic suspension blower

Abstract

The utility model relates to the field of blast blower explosion prevention, in particular to a positive pressure explosion-proof structure for a centrifugal magnetic suspension blast blower, which comprises a positive pressure electric cabinet, a magnetic suspension blast blower is arranged in the positive pressure electric cabinet, an air inlet of the magnetic suspension blast blower is fixedly communicated with a blast blower air inlet pipe, and an air inlet end of the blast blower air inlet pipe penetrates to the outer side of the positive pressure electric cabinet. An air outlet of the magnetic suspension air blower is fixedly communicated with an exhaust pipe, and an air outlet end of the exhaust pipe penetrates to the outer side of the positive voltage electric cabinet. The other end of the air blower cooling air inlet pipe penetrates to the outer side of the positive voltage electric cabinet and communicates with an external cold air supply assembly, the top of the magnetic suspension air blower fixedly communicates with a cooling exhaust pipe, and the other end of the cooling exhaust pipe penetrates to the outer side of the positive voltage electric cabinet. According to the utility model, the cooling requirement of the motor of the magnetic suspension blower in the working process can be met in all directions, and the stability of a positive pressure system can be kept.

Description

Technical Field

[0001] The utility model relates to the field of explosion-proof blowers, in particular to a positive pressure explosion-proof structure for a centrifugal magnetic suspension blower. Background Art

[0002] Under the strong impetus of the country's vigorous implementation of energy conservation and emission reduction policies, magnetic levitation technology has been rapidly popularized and widely promoted. Magnetic levitation blowers are not only used in common fields such as cement and sewage, but also in places with certain risks such as petroleum and chemical industries. Its application areas are also continuously expanding.

[0003] However, when operating in hazardous locations, magnetic levitation blowers must meet strict explosion-proof requirements. Since the structure of the magnetic levitation motor itself is quite complex, if a conventional flameproof structure or increased safety structure is used, it is often difficult to truly meet the explosion-proof requirements. Therefore, positive pressure explosion-proof structures are now mostly used.

[0004] However, in order to fully meet the cooling needs of the magnetic levitation blower motor during operation, most of the current methods are to set up cooling devices inside the positive pressure structure. However, this structural form is not only complicated and cumbersome, but also has the risk of the positive pressure system being unstable. Utility Model Content

[0005] The main technical problem to be solved by the present invention is to provide a positive pressure explosion-proof structure for a centrifugal magnetic levitation blower with a simple structure and convenient operation, which can not only fully meet the cooling needs of the magnetic levitation blower motor during operation, but also maintain the stability of the positive pressure system.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] A positive pressure explosion-proof structure for a centrifugal magnetic levitation blower includes a positive pressure electric cabinet, in which a magnetic levitation blower is arranged, an air inlet of the magnetic levitation blower is fixedly connected to a blower air inlet pipe, an air inlet end of the blower air inlet pipe extends to the outside of the positive pressure electric cabinet, an air outlet of the magnetic levitation blower is fixedly connected to an exhaust pipe, an air outlet end of the exhaust pipe extends to the outside of the positive pressure electric cabinet, and is characterized in that one end of the magnetic levitation blower away from its air inlet is fixedly connected to a blower cooling air inlet pipe, the other end of the blower cooling air inlet pipe extends to the outside of the positive pressure electric cabinet and is connected to an external cold air supply component, the top of the magnetic levitation blower is fixedly connected to a cooling exhaust pipe, and the other end of the cooling exhaust pipe extends to the outside of the positive pressure electric cabinet.

[0008] The following is a further optimization of the above technical solution by the present invention:

[0009] The exhaust pipe is fixedly connected to a pressure relief exhaust pipe, the other end of which passes through the positive pressure electrical cabinet and is connected to the outside, and an electric control valve for controlling the on-off of the pressure relief exhaust pipe is provided on the pressure relief exhaust pipe.

[0010] Further optimization: a section of the pressure relief exhaust pipe is a telescopic pipe, and the telescopic pipe is arranged on the air outlet side of the electric control valve.

[0011] Further optimization: The connections between the blower air inlet pipe, exhaust pipe, blower cooling air inlet pipe, cooling exhaust pipe, pressure relief exhaust pipe and the positive pressure electrical cabinet are all sealed.

[0012] Further optimization: the blower air inlet pipe and the exhaust pipe are arranged perpendicular to each other.

[0013] Further optimization: the diameter of the exhaust pipe gradually increases from the air inlet end to the air outlet end.

[0014] Further optimization: The outer side walls of the air outlet ends of the cooling exhaust duct and the pressure relief exhaust duct are both provided with threads.

[0015] The utility model provides cooling gas through an external cold air supply component, and the cooling gas enters the magnetic levitation blower through the blower cooling air inlet pipe, which is used to cool the internal components of the blower, such as the motor, magnetic levitation bearings, etc. The cooled air will become hot air, which will be discharged from the positive pressure electric cabinet through the cooling exhaust pipe and released into the external environment; thereby cooling the key components inside the magnetic levitation blower, which not only ensures that the equipment will not malfunction due to overheating during long-term operation, thereby extending the service life of the equipment; but also improves the stability of the positive pressure system, so that the adaptability of the equipment to the external environment is enhanced, and it can maintain good performance under various complex working conditions and has a wider range of applications; at the same time, it avoids the setting of additional complex cooling devices and simplifies the structure; in addition, a good cooling system and a smooth airflow channel help to reduce energy consumption, improve the energy utilization efficiency of the equipment, and reduce operating costs.

[0016] By adopting the above technical solution, the utility model has a simple structure and is easy to operate. It can not only fully meet the cooling needs of the magnetic levitation blower motor during operation, but also maintain the stability of the positive pressure system.

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a cross-sectional view of the overall structure of an embodiment of the utility model;

[0019] Figure 2 A top view of an embodiment of the present utility model;

[0020] Figure 3This is a front view of an embodiment of the utility model;

[0021] Figure 4 It is a right side view of an embodiment of the present utility model.

[0022] In the figure: 1-positive pressure electrical cabinet; 2-magnetic levitation blower; 3-blower air inlet pipe; 4-exhaust pipe; 5-blower cooling air inlet pipe; 6-cooling exhaust pipe; 7-pressure relief exhaust pipe; 8-electrically controlled valve; 9-telescopic pipe. DETAILED DESCRIPTION

[0023] like Figure 1-4 As shown, a positive pressure explosion-proof structure for a centrifugal magnetic levitation blower includes a positive pressure electric cabinet 1, a magnetic levitation blower 2 is arranged in the positive pressure electric cabinet 1, the air inlet of the magnetic levitation blower 2 is fixedly connected to the blower air inlet pipe 3, the air inlet end of the blower air inlet pipe 3 passes through the outside of the positive pressure electric cabinet 1, the air outlet of the magnetic levitation blower 2 is fixedly connected to the exhaust pipe 4, the air outlet end of the exhaust pipe 4 passes through the outside of the positive pressure electric cabinet 1, the end of the magnetic levitation blower 2 away from its air inlet is fixedly connected to the blower cooling air inlet pipe 5, the other end of the blower cooling air inlet pipe 5 passes through the outside of the positive pressure electric cabinet 1 and is connected to the external cold air supply component, the top of the magnetic levitation blower 2 is fixedly connected to the cooling exhaust pipe 6, and the other end of the cooling exhaust pipe 6 passes through the outside of the positive pressure electric cabinet 1.

[0024] During specific use, after the magnetic levitation blower 2 is started, the impeller will generate negative pressure at the air inlet when rotating at high speed, thereby sucking external air into the blower inlet pipe 3. After being compressed and accelerated by the magnetic levitation blower 2, the air has a certain pressure and flow rate and is discharged into the exhaust pipe 4 from the air outlet.

[0025] At the same time, the external cold air supply component is started, and the cooling gas enters the magnetic levitation blower 2 through the blower cooling air inlet pipe 5 to cool the internal components of the blower, such as the motor, magnetic levitation bearings, etc. The cooled air will become hot air and be discharged from the positive pressure electrical cabinet 1 through the cooling exhaust pipe 6 and released into the external environment.

[0026] At the same time, the positive pressure electric cabinet 1 provides a positive pressure environment to prevent external flammable and explosive gases from entering the positive pressure electric cabinet 1, thereby ensuring that the magnetic levitation blower 2 can operate safely in an environment with explosion hazards.

[0027] With this design, firstly, the positive pressure environment provided by the positive pressure electrical cabinet 1 can effectively prevent the entry of external flammable and explosive gases, thereby ensuring that the magnetic levitation blower 2 can operate safely in an environment with explosion hazards and protecting the safety of personnel and surrounding facilities.

[0028] Secondly, external cooling gas is introduced through the blower cooling air inlet pipe 5 to cool the key components inside the magnetic levitation blower 2, which not only ensures that the equipment will not malfunction due to overheating during long-term operation, extending the service life of the equipment, and improving the stability of the positive pressure system, but also avoids the setting of additional complex cooling devices and simplifies the structure.

[0029] Thirdly, the reasonable connection between each pipeline and the magnetic suspension blower 2 and the positive pressure electric cabinet 1 makes the structure compact, occupies a small space, and is easy to install and maintain.

[0030] Fourthly, the flow paths of the air inlet, air outlet and cooling gas are clear and stable, which reduces the fluctuations in equipment operation caused by unstable airflow and helps to improve the working stability and reliability of the magnetic levitation blower 2.

[0031] Fifth, a good cooling system and smooth airflow channels help reduce energy consumption, improve the energy utilization efficiency of equipment, and reduce operating costs.

[0032] Sixth, this design enhances the equipment's adaptability to the external environment, enables it to maintain good performance under a variety of complex working conditions, and has a wider range of applications.

[0033] The positive pressure electric cabinet 1 and magnetic levitation blower 2 are existing technologies and are components known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods, so they are not described in detail in this embodiment.

[0034] The exhaust pipe 4 is fixedly connected to a pressure relief exhaust pipe 7, the other end of which passes through the positive pressure electrical cabinet 1 and is connected to the outside. The pressure relief exhaust pipe 7 is provided with an electric control valve 8 for controlling its on and off.

[0035] First, the setting of the pressure relief exhaust pipe 7 and the electric control valve 8 enhances the pressure regulation capability of the system. When the internal pressure of the magnetic levitation blower 2 is too high, the electric control valve 8 can be opened to release the excess pressure to the outside through the pressure relief exhaust pipe 7, thereby avoiding damage to the equipment caused by excessive pressure, ensuring the safe and stable operation of the equipment, and extending the service life of the equipment.

[0036] Secondly, the electric control valve 8 can achieve precise pressure control, so that by cooperating with relevant pressure sensors and control systems, it can intelligently adjust the opening and closing of the pressure relief exhaust pipe 7 according to actual needs, so that the pressure in the system is maintained within an appropriate range, thereby improving the operating efficiency and stability of the entire system.

[0037] Furthermore, in emergencies, such as equipment failure or abnormal operating conditions causing a sudden increase in pressure, the pressure relief exhaust pipe 7 can quickly and effectively discharge the pressure, reduce the risk of accidents, and ensure the safety of operators and the safety of the working environment.

[0038] In addition, the control strategy of the electric control valve 8 can be flexibly adjusted according to different working conditions and requirements to adapt to various complex working scenarios.

[0039] A section of the pressure relief exhaust pipe 7 is a telescopic pipe 9 , and the telescopic pipe 9 is arranged on the air outlet side of the electric control valve 8 .

[0040] With this design, firstly, since the telescopic tube 9 can be telescoped, it can compensate for the pipe size changes caused by temperature changes, vibrations or installation errors to a certain extent, thereby ensuring the connection tightness and stability of the pressure relief exhaust pipe 7.

[0041] Secondly, when the electric control valve 8 is opened to release pressure, the telescopic tube 9 can buffer the instantaneous pressure shock, reduce damage to the pipeline and related components, and extend the service life of the equipment.

[0042] Furthermore, when the pressure is too high and emergency pressure relief is required, the telescopic characteristics of the telescopic tube 9 can better adapt to large pressure changes, ensure the smooth progress of the pressure relief process, and reduce the dangers that may be caused by sudden pressure changes.

[0043] In addition, the retractability of the telescopic tube 9 makes the installation process more convenient, can reduce the installation difficulty and improve the installation accuracy; at the same time, in subsequent maintenance and inspection, the detachability and flexibility of the telescopic tube 9 also facilitate the operation of the electric control valve 8 and other related components.

[0044] Finally, the use of the telescopic tube 9 can reduce the need for high-precision machining and installation of rigid pipes, thereby reducing the overall cost of the system.

[0045] The connections between the blower air inlet pipe 3, the exhaust pipe 4, the blower cooling air inlet pipe 5, the cooling exhaust pipe 6, the pressure relief exhaust pipe 7 and the positive pressure electrical cabinet 1 are all sealed.

[0046] This design, firstly, ensures that the incoming and outgoing gases flow along the predetermined pipelines during the operation of the magnetic levitation blower 2 and will not leak from the connection points into the interior or external environment of the positive pressure electrical cabinet 1, thereby maintaining the stability of the gas flow and pressure of the system and ensuring the normal operation efficiency of the equipment.

[0047] Secondly, good sealing can prevent external gas from entering the positive pressure electrical cabinet 1, maintain the positive pressure environment inside the cabinet, thereby better preventing the intrusion of external flammable and explosive gases, significantly improving the explosion-proof performance, and ensuring the safe operation of the equipment in dangerous environments.

[0048] Thirdly, the compression and transmission energy of the magnetic levitation blower 2 is fully utilized, which reduces energy consumption and improves the energy efficiency of the entire system.

[0049] Fourthly, the sealing design can prevent external impurities such as dust and moisture from entering the pipes and equipment, reducing erosion and damage to internal components and extending the service life and maintenance cycle of the equipment.

[0050] Fifth, sealed joints can reduce the noise generated by gas leakage, optimize the working environment and reduce noise pollution.

[0051] The blower air inlet pipe 3 and the air exhaust pipe 4 are arranged perpendicular to each other.

[0052] This design, first of all, can arrange the pipeline direction more reasonably within the limited installation space, reduce the intersection and interference of pipelines, and make the layout of the entire system more compact and regular.

[0053] Secondly, the vertical setting can avoid direct conflict and interference between the intake and exhaust airflows, allowing the airflows to flow more smoothly in their respective ducts, thereby reducing the pressure loss of the system and improving the working efficiency and performance of the blower.

[0054] Furthermore, the mutually perpendicular pipeline layout can reduce the risk of loose connections and leakage caused by pipeline vibration or displacement, ensuring the reliability and stability of the system during operation.

[0055] In addition, the vertical design makes the connection and disassembly of the pipes more convenient, which is conducive to the inspection, cleaning and replacement of parts of the air inlet pipe and the exhaust pipe 4, reducing maintenance costs and work difficulty.

[0056] Finally, the vertical setting helps to better separate the flow fields of intake and exhaust, reduce the generation of backflow and vortex, and further improve the operation effect of the blower and the gas delivery quality.

[0057] The diameter of the exhaust pipe 4 gradually increases from the air inlet end to the air outlet end.

[0058] With this design, firstly, as the pipe diameter gradually increases, the speed of the gas in the flow process gradually decreases, thereby reducing the friction resistance between the gas and the pipe wall and improving the exhaust efficiency.

[0059] Secondly, the increase in pipe diameter makes the pressure change of gas during the flow process more gentle, reducing the pressure drop caused by sudden change or narrowing of pipe diameter, thereby ensuring the pressure stability of the entire exhaust system.

[0060] Furthermore, the uniform increase in pipe diameter helps to avoid the generation of airflow turbulence and eddies, thereby reducing the generation of airflow noise and creating a relatively quiet working environment.

[0061] In addition, the larger pipe diameter can accommodate more exhaust gas at the air outlet end, avoiding gas accumulation and blockage in the pipe and ensuring smooth exhaust.

[0062] Finally, it can better adapt to the exhaust requirements under different working conditions. When the exhaust volume is large, the larger pipe diameter can effectively discharge the gas and prevent the system from overloading.

[0063] The outer side walls of the air outlet ends of the cooling exhaust pipe 6 and the pressure relief exhaust pipe 7 are both provided with threads.

[0064] With this design, first of all, the square thread design makes the connection with other pipes, joints or accessories tighter and more stable, ensuring that there will be no loosening or leakage during operation.

[0065] Secondly, threads can increase the friction and fit of the contact surface, effectively preventing gas leakage from the connection and ensuring the airtightness and stability of the system.

[0066] Furthermore, connection and separation can be achieved by rotation, which is relatively simple and quick to operate, thereby improving the efficiency of installation and maintenance.

[0067] In addition, the depth and position of the connection can be adjusted by the degree of rotation according to actual needs to achieve the best exhaust effect.

[0068] Finally, threaded connection is a common and standard connection method that is easily compatible with common accessories on the market, making it easy to find suitable parts when the system needs to be replaced or expanded.

[0069] For ordinary technicians in this field, based on the teachings of this utility model, without departing from the principles and spirit of this utility model, changes, modifications, substitutions and variations made to the implementation methods are still within the scope of protection of this utility model.

Claims

1. A positive pressure explosion-proof structure for a centrifugal magnetic levitation blower, comprising a positive pressure electric cabinet (1), a magnetic levitation blower (2) being arranged in the positive pressure electric cabinet (1), an air inlet of the magnetic levitation blower (2) being fixedly connected to a blower air inlet pipe (3), an air inlet end of the blower air inlet pipe (3) passing through the outside of the positive pressure electric cabinet (1), an air outlet of the magnetic levitation blower (2) being fixedly connected to an exhaust pipe (4), an air outlet end of the exhaust pipe (4) passing through the outside of the positive pressure electric cabinet (1), characterized in that: One end of the magnetic levitation blower (2) away from its air inlet is fixedly connected to a blower cooling air inlet pipe (5), and the other end of the blower cooling air inlet pipe (5) passes through the outside of the positive pressure electric cabinet (1) and is connected to the external cold air supply component. The top of the magnetic levitation blower (2) is fixedly connected to a cooling exhaust pipe (6), and the other end of the cooling exhaust pipe (6) passes through the outside of the positive pressure electric cabinet (1).

2. A positive pressure explosion-proof structure for a centrifugal magnetic levitation blower according to claim 1, characterized in that: The exhaust pipe (4) is fixedly connected to a pressure relief exhaust pipe (7), the other end of which passes through the positive pressure electrical cabinet (1) and is connected to the outside, and an electric control valve (8) for controlling the on-off of the pressure relief exhaust pipe (7) is provided on the pressure relief exhaust pipe (7).

3. The positive pressure explosion-proof structure for a centrifugal magnetic levitation blower according to claim 2, characterized in that: A section of the pressure relief exhaust pipe (7) is a telescopic pipe (9), and the telescopic pipe (9) is arranged on the air outlet side of the electric control valve (8).

4. The positive pressure explosion-proof structure for a centrifugal magnetic levitation blower according to claim 3, characterized in that: The connection points between the blower air inlet pipe (3), the exhaust pipe (4), the blower cooling air inlet pipe (5), the cooling exhaust pipe (6), the pressure relief exhaust pipe (7) and the positive pressure electric cabinet (1) are all sealed.

5. The positive pressure explosion-proof structure for a centrifugal magnetic levitation blower according to claim 4, characterized in that: The blower air inlet pipe (3) and the air exhaust pipe (4) are arranged perpendicular to each other.

6. The positive pressure explosion-proof structure for a centrifugal magnetic levitation blower according to claim 5, characterized in that: The diameter of the exhaust pipe (4) gradually increases from the air inlet end to the air outlet end.

7. The positive pressure explosion-proof structure for a centrifugal magnetic levitation blower according to claim 6, characterized in that: Threads are provided on the outer side walls of the air outlet ends of the cooling exhaust pipe (6) and the pressure relief exhaust pipe (7).

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