Device for switching mutual standby fans of ventilation system

Abstract

The utility model discloses a device for switching mutual standby fans of a ventilation system, and belongs to the field of fans. Comprising an air inlet device (a fixed air duct, a movable air duct, a sealing material, a supporting device and a guide pin shaft), an air outlet device (a fixed air duct, a movable air duct, a sealing material, a supporting device and a guide pin shaft), fans (a fan unit I and a fan unit II) and a rack. The ventilation structure can be mechanically locked, it is guaranteed that the ventilation structure is stable, meanwhile, the draught fans (the first draught fan unit and the second draught fan unit) and the rack are arranged, and when the draught fans are switched, the rack is moved to achieve switching of the draught fans.

Description

Technical Field

[0001] The utility model belongs to the field of fans, and particularly relates to a device for mutual standby fan switching in a ventilation system. Background Art

[0002] At present, two openings are arranged at the air outlet of the coal mine exhaust shaft, and two sets of explosion-proof exhaust axial flow ventilation fan units for coal mine ground are installed side by side and used as mutual backups. Each set of units mainly consists of a roadway joint, a collector, a damper device, a primary main machine, a secondary main machine, a diffuser, a round-to-square transition, a muffler, a diffuser tower, etc., and each group of units corresponds to a ventilation roadway joint. In actual production, only the primary main machine and the secondary main machine need to be periodically interchanged for maintenance and repair, and there is redundancy in one group of the remaining equipment and facilities.

[0003] The existing explosion-proof exhaust axial flow ventilation fans for coal mine ground generally have the following problems in use:

[0004] 1. Multiple air outlets increase the civil engineering cost of the coal mine, the wind resistance of the wind well bends and the power consumption of the units: The design of multiple air outlets increases the complexity of the coal mine civil engineering, improves the material and labor costs, and at the same time leads to an increase in the wind resistance of the wind well bends, reduces the ventilation efficiency, increases the load of the units, and further increases the power consumption, energy consumption and the operation and maintenance costs of the equipment, affecting the overall economic benefits and safety. Therefore, there is an urgent need for a fan that can reduce the construction cost.

[0005] 2. Its components are redundant and the equipment cost is relatively high: The fan has many types of components, involving multiple complex mechanical and electrical components such as motors, bearings, blades, air ducts, and adjustment mechanisms. The complexity of the components not only increases the difficulty of manufacturing and assembly, but also makes the later maintenance, repair and replacement of parts more cumbersome, easily increasing the equipment downtime and affecting the production efficiency. Therefore, there is an urgent need for a fan with a simplified structure.

[0006] 3. The butterfly valve in the equipment is prone to failure, and there is also a hidden danger that the butterfly valve cannot operate when opening and closing due to freezing: The butterfly valve of the fan is prone to failure. Especially in a freezing environment, the butterfly valve may freeze due to low temperature, affecting its opening and closing function, thus bringing a hidden danger of untimely response during equipment operation, seriously affecting the safety and reliability of the system. Therefore, there is an urgent need for a fan that avoids using a butterfly valve. Content of the Utility Model

[0007] The main purpose of the utility model is to provide a device for mutual standby fan switching in a ventilation system, which can effectively solve the problems in the background art.

[0008] To achieve the above object, the technical solution adopted by the present utility model is as follows: A device for mutual backup fan switching in a ventilation system, comprising an air inlet device, an air outlet device, a fan, and a frame. The fan is arranged at the rear end of the air inlet device, the air outlet device is arranged at the rear end of the fan, the frame is arranged at the lower end of the fan, and the fan is composed of fan unit one and fan unit two.

[0009] Further, the fan is installed on the frame, a towing wheel is arranged at the lower end of the frame, and the frame can make a horizontal movement along the vertical direction of the axis of the fan air duct on the track by using the towing wheel and is provided with a positioning device.

[0010] Further, the air inlet device is composed of a fixed air duct and a movable air duct. The fixed air duct is installed at the air inlet end, the movable air duct is connected to the fixed air duct by a flexible connection method, the movable air duct makes a displacement along the axis direction of the air duct under the action of an external force through a guiding pin shaft and a supporting device, a sealing material is installed on the flange surface of the air outlet end of the movable air duct, and when the movable air duct extends, it presses on the flange surface of the air inlet end of the fan main body to play a sealing role.

[0011] Further, the air outlet device is composed of a fixed air duct and a movable air duct. The fixed air duct is installed at the air outlet end, the movable air duct is connected to the fixed air duct by a flexible connection method, the movable air duct makes a displacement along the axis direction of the air duct under the action of an external force through a guiding pin shaft and a supporting device, a sealing material is installed on the flange surface of the air inlet end of the movable air duct, and when the movable air duct extends, it presses on the flange surface of the air outlet end of the fan main body to play a sealing role.

[0012] Further, the above-mentioned air inlet device, air outlet device, one set of fan unit, and frame form an operating whole. The whole system structure includes: one set of air inlet device, air outlet device; two sets of fan units and two frames.

[0013] The present utility model has the following beneficial effects:

[0014] 1. In the present utility model, only one air outlet opening is provided for the air extraction shaft, which reduces the civil construction cost of the coal mine, reduces the air resistance of the wind shaft bends, reduces the power consumption of the unit, and brings the following benefits: Reducing the civil construction cost of the coal mine: Since the number of air outlet openings is reduced, the coal mine no longer needs to design and construct additional ventilation ducts and support structures for multiple air outlets in the civil engineering of the ventilation system, greatly reducing the input of materials and labor, thereby effectively reducing the overall construction cost. Reducing the air resistance of the wind shaft bends: The design of a single air outlet opening reduces the complex bend structure in the wind shaft. The fewer the bends, the smaller the resistance of the air flow, which helps to keep the ventilation system unobstructed, reduces the situation of air flow being blocked, and thus improves the working efficiency of the fan. Fewer bends also mean that the air flow is more uniform, which helps to maintain the safety and stability in the mine. Reducing the power consumption of the unit: Due to the simplified structure of the wind shaft and the reduced air resistance, the fan no longer needs to overcome excessive air flow resistance during operation, so the power consumed is reduced, directly reducing the energy consumption of the unit. This not only helps to improve the operation efficiency of the system, but also reduces the long-term operation and maintenance costs of the equipment, further improving the economy.

[0015] 2. In the present utility model, a set of roadway joints, collectors, diffusers, round-to-square transitions, mufflers, diffuser towers, two butterfly valves and butterfly valve ducts are reduced, and the following benefits are brought: Simplifying the system structure and reducing equipment investment: By reducing the use of multiple components such as roadway joints, collectors, diffusers, etc., the cost of equipment procurement is reduced. The reduction of various auxiliary equipment makes the structure of the entire ventilation system more concise, reduces the time and cost required for installation and maintenance, and reduces the initial equipment investment. Reducing the maintenance cost and equipment failure rate: The use of vulnerable components such as butterfly valves and ducts is reduced, reducing the possible failure points in the system, reducing the probability of equipment failure during operation, reducing the later maintenance cost and downtime, and improving the overall reliability and operation stability of the system. Reducing the space occupied by equipment: After reducing these large components, the overall floor area of the ventilation system is reduced, providing more flexibility for equipment layout and space utilization in the coal mine. After reducing large devices such as butterfly valves and ducts, the equipment layout is more compact, saving space resources. Simplifying the system design and construction difficulty: The reduction in the number of equipment in the system simplifies the design and construction process of the ventilation system, reduces the construction difficulty and time requirements. This makes the installation and commissioning process more efficient, while reducing potential engineering risks and ensuring that the system can be put into use more quickly.

[0016] 3. In this utility model, a reducing butterfly valve is provided. On the one hand, it reduces the equipment failure points; on the other hand, in alpine regions, it avoids the hidden danger that the butterfly valve cannot operate when it needs to be opened or closed due to freezing, and brings the following benefits: Reducing equipment failure points: The butterfly valve is a relatively complex and vulnerable component in the fan system. Reducing the use of the butterfly valve effectively reduces the potential failure points in the equipment. This makes the operation of the entire system more reliable, reduces equipment downtime and maintenance requirements caused by butterfly valve failures, and improves the overall stability and continuous working ability of the system. Avoiding the hidden danger of butterfly valve freezing in alpine regions: In alpine regions, the low-temperature environment is likely to cause the butterfly valve to freeze, which in turn affects its opening and closing functions and causes the ventilation system to malfunction. By reducing the use of the butterfly valve, this utility model effectively avoids this hidden danger, ensures the normal operation of the equipment in the low-temperature environment, reduces the negative impact of cold weather on the equipment performance, and improves the adaptability of the system under extreme climate conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 is a schematic diagram of the air inlet device structure of this utility model;

[0019] In the figure: 1. Air inlet device; 2. Air outlet device; 3. Fan; 4. Frame; 101. Fixed air duct; 102. Movable air duct; 103. Sealing material; 104. Support device; 105. Guide pin shaft; 301. Fan unit one; 302. Fan unit two; 401. Trolley wheel. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] In order to make the technical means, creative features, achieved purposes and effects of this utility model easy to understand, the following further elaborates this utility model in conjunction with the specific embodiments.

[0021] In the description of this utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing this utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of this utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0022] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, terms such as "installation", "provided with", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0023] Those skilled in the art should connect all the electrical components in this case to their adapted power sources through wires, and should select a suitable controller according to the actual situation to meet the control requirements. For the specific connection and control sequence, reference should be made to the sequence of the electrical components working successively in the following working principle to complete the electrical connection. The detailed connection means are well-known techniques in the art. The following mainly introduces the working principle and process, and no further description of the electrical control will be made.

[0024] Embodiment

[0025] Please refer to Figure 1-2 , the present utility model provides a technical solution:

[0026] In this embodiment, a device for mutual backup fan switching in a ventilation system includes an air inlet device 1, an air outlet device 2, a fan 3, and a frame 4. The fan 3 is arranged at the rear end of the air inlet device 1, the air outlet device 2 is arranged at the rear end of the fan 3, the frame 4 is arranged at the lower end of the fan 3, and the fan 3 is composed of a fan unit one 301 and a fan unit two 302.

[0027] In this embodiment, the fan 3 is installed on the frame 4, a towing wheel 401 is arranged at the lower end of the frame 4, and the frame 4 can move horizontally along the vertical direction of the fan air duct axis on the track by using the towing wheel 401 and is provided with a positioning device.

[0028] In this embodiment, the air inlet device 1 is composed of a fixed air duct 101 and a movable air duct 102. The fixed air duct 101 is installed at the air inlet end, the movable air duct 102 is connected to the fixed air duct 101 in a flexible connection manner, the movable air duct 102 makes a displacement along the air duct axis direction under the action of an external force through a guiding pin shaft 105 and a supporting device 104, and a sealing material 103 is installed on the flange surface at the air outlet end of the movable air duct 102. When the movable air duct 102 extends, it presses on the flange surface at the air inlet end of the fan to play a sealing role.

[0029] In this embodiment, the air outlet device 2 is composed of a fixed air duct 101 and a movable air duct 102. The fixed air duct 101 is installed at the air outlet end. The movable air duct 102 is connected to the fixed air duct 101 by a flexible connection method. The movable air duct 102 makes a displacement in the axial direction of the air duct under the action of an external force through a guiding pin shaft 105 and a supporting device 104. A sealing material 103 is installed on the flange surface of the air inlet end of the movable air duct 102. When the movable air duct 102 extends out, it presses on the flange surface of the air outlet end of the fan to play a sealing role.

[0030] In this embodiment, the above-mentioned air inlet device 1, air outlet device 2, fan 3, and frame 4 form an operating whole. The entire system structure consists of a set of air inlet device, a set of air outlet device, two sets of fan units, and a frame.

[0031] This embodiment relates to a device for switching the standby fans in a ventilation system, aiming to improve the operating stability and maintenance efficiency of the fan system. It is mainly applied to occasions that require continuous ventilation, such as coal mines, tunnels, or other industrial environments that require large-scale ventilation.

[0032] Structural composition:

[0033] The device includes the following main components:

[0034] Air inlet device: Responsible for guiding external air into the fan.

[0035] Air outlet device: Used to discharge the air output by the fan to the outside.

[0036] Fan: Composed of two independent fan units, used for switching working states.

[0037] Frame: Used to support the fan. The lower end of the frame is equipped with a trolley wheel, which can move horizontally in the vertical direction of the fan air duct axis along the track and is equipped with a positioning device to ensure the accuracy of the fan position.

[0038] Working principle:

[0039] Installation and positioning of the unit: The fan is installed on the frame, and the frame moves on the track through the trolley wheel, so that the fan can accurately dock with the air inlet device and the air outlet device. The structures of the air inlet device and the air outlet device are the same, both including a fixed air duct and a movable air duct. The fixed air duct is connected to the equipment through a flange, and the movable air duct can move along the axial direction of the air duct through a guiding pin shaft and a supporting device. The movable air duct is provided with a sealing material for sealing connection with the flange end face of the fan when the fan is switched.

[0040] Fan unit switching process: The frame moves the first unit to between the air inlet device and the air outlet device. The positioning pin shaft is inserted into the positioning device to ensure that the unit is fixed. At this time, the movable air duct of the air inlet device extends under the action of external force, and the sealing material on the flange end face presses on the flange of the air inlet end of the first unit to achieve sealed connection. At the same time, the movable air duct of the air outlet device extends under the action of external force, and the sealing material on the flange end face presses on the flange of the air outlet end of the first unit, and the first unit starts to operate.

[0041] Machine changeover steps: When it is necessary to switch to the second unit, the first unit first shuts down and cuts off the power. The movable air duct of the air inlet device retracts under the action of external force, and the sealing material on the flange end face separates from the flange of the first unit. The movable air duct of the air outlet device also retracts, and the sealing material on the flange end face separates from the flange of the first unit. Then, the positioning pin shaft is pulled out, the frame is moved, and the second unit is moved to between the air inlet device and the air outlet device. The positioning pin shaft is inserted again to ensure the stable position of the second unit. At this time, the movable air ducts of the air inlet device and the air outlet device extend, and the sealing material presses on the flange end face of the second unit, and the second unit can start to work, while the first unit is in the state of maintenance.

[0042] This embodiment realizes the efficient switching and maintenance of the fan mutual backup system by reducing the complex operations in the switching process, and has remarkable advantages such as good sealing performance, simple switching operation, and convenient equipment maintenance.

[0043] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for switching between fans of a ventilation system, comprising an air inlet device (1), an air outlet device (2), a fan (3), and a frame (4), characterized in that: A fan (3) is arranged at the rear end of the air inlet device (1), an air outlet device (2) is arranged at the rear end of the fan (3), a frame (4) is arranged at the lower end of the fan (3), the fan (3) is composed of a fan unit 1 (301) and a fan unit 2 (302), the air inlet device (1) is composed of a fixed air cylinder (101) and a movable air cylinder (102), and the air outlet device (2) is composed of a fixed air cylinder (101) and a movable air cylinder (102).

2. A device for switching between standby fans in a ventilation system according to claim 1, characterized in that: The fan (3) is mounted on the frame (4), a tug wheel (401) is arranged at the lower end of the frame (4), and the frame (4) can move horizontally on the track along the vertical direction of the fan air duct axis by means of the tug wheel (401) and is provided with a positioning device.

3. A device for switching between standby fans in a ventilation system according to claim 1, characterized in that: The fixed wind tube (101) is installed at the air inlet end, and the movable wind tube (102) is connected to the fixed wind tube (101) by a flexible connection. The movable wind tube (102) is displaced along the axial direction of the wind tube under the action of external force through a guide pin shaft (105) and a support device (104). A sealing material (103) is provided on the flange surface of the air outlet end of the movable wind tube (102). In order to achieve a sealing effect, the movable wind tube (102) is pressed on the flange surface of the air inlet end of the fan when it is extended.

4. A device for switching between standby fans in a ventilation system according to claim 1, characterized in that: The fixed wind tube (101) is installed at the air outlet end, and the movable wind tube (102) is connected to the fixed wind tube (101) by a flexible connection. The movable wind tube (102) is displaced along the wind tube axis direction under the action of external force through a guide pin shaft (105) and a support device (104). A sealing material (103) is provided on the flange surface of the air inlet end of the movable wind tube (102). In order to achieve a sealing effect, the movable wind tube (102) is pressed on the flange surface of the air outlet end of the fan when it is extended.

5. The device for switching between standby fans of a ventilation system according to claim 1, characterized in that: The air inlet device (1), the air outlet device (2), the fan (3) and the frame (4) constitute a unit.

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