Explosion-proof industrial fan explosion-proof cavity rapid pressure relief structure

Abstract

This utility model discloses a rapid pressure relief structure for the explosion-proof chamber of an explosion-proof industrial fan, specifically relating to the field of industrial fan technology. It includes a fan body and an explosion-proof chamber, with one side of the chamber fixedly connected to the air outlet of the fan body, and the other side of the chamber fixedly connected to a connecting pipe. A vertical cylinder is connected to the top of the explosion-proof chamber, and multiple air outlets are provided on the cylinder. An expansion joint is installed inside the cylinder, comprising an I-shaped plate, two expansion rods, two springs, and two control switches. In this utility model, the air generated by the fan body enters the explosion-proof chamber and is finally discharged through the connecting pipe. The pressure pushes the I-shaped plate upwards, thereby compressing the two springs. When the I-shaped plate moves to the top of the air outlets, the gas in the explosion-proof chamber and the vertical cylinder is discharged through the multiple air outlets, thus relieving pressure. The operation is simple and convenient for automatic and rapid pressure relief.

Description

Technical Field

[0001] This utility model relates to the field of industrial fan technology, and more specifically, to a rapid pressure relief structure for the explosion-proof cavity of an explosion-proof industrial fan. Background Technology

[0002] Explosion-proof industrial fans are industrial ventilation equipment with explosion-proof functions. They are mainly used for ventilation, heat dissipation, and dust removal in hazardous environments containing flammable and explosive gases, vapors, dust, etc. They can effectively prevent explosion accidents caused by electric sparks, high temperatures, etc. generated during fan operation. The explosion-proof cavity is one of the core explosion-proof structures of the explosion-proof industrial fan. It is a closed cavity that can withstand the internal explosion pressure and prevent the explosion from spreading to the outside.

[0003] A search revealed that Chinese patent CN217785383U discloses an explosion-proof intelligent pressure relief and ventilation device. This device features a pressure relief channel installed at the exhaust fan's outlet and an electric push rod installed behind a pressure relief baffle. When ventilation is needed, the electric push rod pushes up the pressure relief baffle, activating the exhaust fan to provide ventilation. Before the fire extinguishing equipment is activated, the electric push rod retracts, allowing the pressure relief baffle to automatically release pressure. This technology resolves the functional conflict between the pressure relief device and the exhaust fan, and also provides automatic intelligent monitoring and ventilation.

[0004] When the above-mentioned pressure relief structure is in use, the electric push rod is guaranteed to retract, and the pressure relief baffle plays an automatic pressure relief role. However, in emergency situations such as fire or explosion, the electric push rod may fail due to power failure, mechanical jamming, or interruption of control signal, which may cause the pressure relief port to fail to open normally, resulting in excessively high air pressure in the protected area, which may lead to damage to the building structure and make it inconvenient to automatically relieve pressure. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, this utility model provides a rapid pressure relief structure for the explosion-proof chamber of an explosion-proof industrial fan, which aims to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a rapid pressure relief structure for an explosion-proof industrial fan's explosion-proof cavity, comprising a fan body and an explosion-proof cavity, wherein one side of the explosion-proof cavity is fixedly connected to the air outlet of the fan body, and the other side of the explosion-proof cavity is fixedly connected to a connecting pipe, and the top of the explosion-proof cavity is connected to a vertical cylinder, the vertical cylinder having multiple air outlets, and a telescopic assembly being provided inside the vertical cylinder, the telescopic assembly comprising an I-shaped plate, two telescopic rods, two springs, and two control switches, the top and bottom ends of the two telescopic rods being fixedly connected to the vertical cylinder and the I-shaped plate respectively, the two springs being located inside the two telescopic rods respectively, and the top and bottom ends of the two springs being fixedly connected to the telescopic rods, and the bottom ends of the two control switches being fixedly connected to the I-shaped plate.

[0007] Furthermore, a gasket is fixedly sleeved on the outer side of the I-shaped plate, and the outer side of the gasket is in contact with the vertical cylinder.

[0008] As can be seen, in the above technical solution, the gasket can improve the sealing between the I-beam and the vertical cylinder.

[0009] Furthermore, a flange is fixedly fitted at the bottom edge of the outer side of the vertical cylinder, and multiple bolts are provided on the flange, which is fixed to the explosion-proof chamber by the multiple bolts.

[0010] As can be seen, in the above technical solution, the flange is installed on the explosion-proof enclosure by four bolts, thereby connecting the vertical cylinder with the explosion-proof enclosure.

[0011] Furthermore, each of the two control switches is movably provided with a pressing rod at its top, and the top ends of both pressing rods are fixedly connected to the vertical cylinder.

[0012] Furthermore, an alarm is fixedly connected to the top of the vertical cylinder near one edge.

[0013] It can be seen that the above technical solution is designed to facilitate reminding staff that the pressure inside the explosion-proof enclosure is too high at this time.

[0014] Furthermore, a partition is fixedly connected inside the vertical cylinder, a baffle is movably provided on the top of the partition, a stepper motor is fixedly connected to the top of the baffle, and the motor is fixedly installed inside the vertical cylinder.

[0015] Furthermore, the top of the inner end of the vertical cylinder is threadedly connected to a threaded sleeve, and a pressure-resistant diaphragm is fixedly connected inside the threaded sleeve.

[0016] As can be seen, in the above technical solution, rotating the threaded sleeve and moving it away from the vertical cylinder allows for the disassembly and replacement of the pressure-resistant diaphragm.

[0017] The technical effects and advantages of this utility model are as follows:

[0018] 1. This utility model uses the air generated by the operation of the blower body to enter the explosion-proof chamber and finally discharge through the connecting pipe. The pressure pushes the I-shaped plate to move upward, thereby driving the two springs to compress. When the I-shaped plate moves to the top of the air outlet, the gas in the explosion-proof chamber and the vertical cylinder is discharged through multiple air outlets, thereby depressurizing. The operation is simple and convenient for automatic and rapid depressurization.

[0019] 2. This utility model controls the alarm to work through one of the control switches. When the alarm is activated, it sounds an alarm to remind the staff that the pressure inside the explosion-proof chamber is too high. The other control switch controls the stepper motor to work. The stepper motor drives the baffle to rotate, and the through holes on the baffle and the partition are not aligned. Gas can pass through the through holes on the partition, and the pressure-resistant membrane ruptures instantly to form a pressure relief channel. The structure is simple and further improves the pressure relief effect. Attached Figure Description

[0020] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a bottom view of the overall structure of this utility model;

[0023] Figure 3 This is a cross-sectional view of the vertical tube and a schematic diagram of the telescopic component assembly structure of this utility model.

[0024] Figure 4 This is a cross-sectional view of the vertical cylinder and a schematic diagram of the extrusion rod assembly structure of this utility model.

[0025] Figure 5 This is a schematic diagram of the telescopic component structure of this utility model.

[0026] In the diagram: 1. Fan body; 2. Explosion-proof enclosure; 3. Connecting pipe; 4. Flange; 5. Vertical cylinder; 6. Threaded sleeve; 7. Pressure-resistant membrane; 8. Alarm; 9. Bolt; 10. Air outlet; 11. Gasket; 12. Telescopic assembly; 13. Extrusion rod; 14. Partition plate; 15. Stepper motor; 16. Baffle plate; 121. I-beam; 122. Telescopic rod; 123. Spring; 124. Control switch. Detailed Implementation

[0027] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] Refer to the instruction manual appendix Figure 1-5 The explosion-proof industrial fan explosion-proof cavity rapid pressure relief structure of this embodiment includes a fan body 1 and an explosion-proof cavity 2. One side of the explosion-proof cavity 2 is fixedly connected to the air outlet end of the fan body 1, and the other side of the explosion-proof cavity 2 is fixedly connected to a connecting pipe 3. The top of the explosion-proof cavity 2 is connected to a vertical cylinder 5. The vertical cylinder 5 has multiple air outlets 10. The interior of the vertical cylinder 5 is provided with a telescopic assembly 12. The telescopic assembly 12 includes an I-shaped plate 121, two telescopic rods 122, two springs 123, and two control switches 124. The top and bottom ends of the two telescopic rods 122 are fixedly connected to the vertical cylinder 5 and the I-shaped plate 121, respectively. The two springs 123 are located inside the two telescopic rods 122, and the top and bottom ends of the two springs 123 are fixedly connected to the telescopic rods 122. The bottom ends of the two control switches 124 are fixedly connected to the I-shaped plate 121.

[0029] Furthermore, a gasket 11 is fixedly fitted on the outer side of the I-shaped plate 121, and the outer side of the gasket 11 is in contact with the vertical cylinder 5. A flange 4 is fixedly fitted at the bottom edge of the outer side of the vertical cylinder 5. Multiple bolts 9 are provided on the flange 4, and the flange 4 is fixed to the explosion-proof box cavity 2 by multiple bolts 9.

[0030] Furthermore, each of the two control switches 124 has a pressing rod 13 movably mounted on its top, and the top of each pressing rod 13 is fixedly connected to the vertical cylinder 5. An alarm 8 is fixedly connected to the top of the vertical cylinder 5 near one side edge. A partition 14 is fixedly connected inside the vertical cylinder 5. A baffle 16 is movably mounted on the top of the partition 14. A stepper motor 15 is fixedly connected to the top of the baffle 16, and the motor 15 is fixedly installed inside the vertical cylinder 5. A threaded sleeve 6 is threadedly connected to the top of the inside of the vertical cylinder 5, and a pressure-resistant diaphragm 7 is fixedly connected inside the threaded sleeve 6.

[0031] In this system, the I-beam plate 121 drives two control switches 124 to move upward. When the pressure inside the explosion-proof chamber 2 is too high, the two extrusion rods 13 come into contact with the two control switches 124 and extrude pressure on them. One of the control switches 124 controls the alarm 8 to work, which sounds an alarm to alert the staff that the pressure inside the explosion-proof chamber 2 is too high. The other control switch 124 controls the stepper motor 15 to work, which drives the baffle 16 to rotate and makes the through hole on the baffle 16 not coincide with the through hole on the partition 14. Gas can pass through the through hole on the partition 14, and the pressure-resistant membrane 7 ruptures instantly, forming a pressure relief channel. The structure is simple and further improves the pressure relief effect. The threaded sleeve 6 is rotated away from the vertical cylinder 5 to disassemble and replace the pressure-resistant membrane 7.

[0032] The usage method of this embodiment is as follows:

[0033] In use, the operator starts the main body 1 of the fan. The air generated by the main body 1 enters the explosion-proof chamber 2 and is finally discharged through the connecting pipe 3, forming a complete air duct. The flange 4 is installed on the explosion-proof chamber 2 by four bolts 9, thereby connecting the vertical cylinder 5 to the explosion-proof chamber 2. When the pressure in the explosion-proof chamber 2 is too high, the pressure pushes the I-shaped plate 121 to move upward, thereby driving the two telescopic rods 122 to retract, which in turn drives the two springs 123 to compress. When the I-shaped plate 121 moves to the top of the air outlet 10, the gas in the explosion-proof chamber 2 and the vertical cylinder 5 is discharged through multiple air outlets 10, thereby relieving pressure. When the pressure decreases, the two springs 123 rebound and drive the I-shaped plate 121 to move downward. The gasket 11 can improve the sealing between the I-shaped plate 121 and the vertical cylinder 5. This cycle repeats, making the operation simple and convenient for automatic and rapid pressure relief. It is worth noting that the main body 1 of the fan is an explosion-proof industrial fan.

[0034] All contents not described in detail in the specification are existing technologies known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited; conventional equipment can be used. Electrical control components not mentioned in this technical solution are not shown in the figures because they are existing technologies, and will not be described here.

[0035] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A rapid pressure relief structure for an explosion-proof industrial fan's flameproof cavity, comprising a fan body (1) and a flameproof enclosure (2), wherein one side of the flameproof enclosure (2) is fixedly connected to the air outlet end of the fan body (1), characterized in that: The explosion-proof enclosure (2) is fixedly connected to a connecting pipe (3) on the other side. The top of the explosion-proof enclosure (2) is connected to a vertical cylinder (5). The vertical cylinder (5) has multiple air vents (10). The vertical cylinder (5) is equipped with a telescopic assembly (12). The telescopic assembly (12) includes an I-shaped plate (121), two telescopic rods (122), two springs (123), and two control switches (124). The top and bottom of the two telescopic rods (122) are fixedly connected to the vertical cylinder (5) and the I-shaped plate (121), respectively. The two springs (123) are located inside the two telescopic rods (122), and the top and bottom of the two springs (123) are fixedly connected to the telescopic rods (122). The bottom of the two control switches (124) are fixedly connected to the I-shaped plate (121).

2. The explosion-proof industrial fan explosion-proof cavity rapid pressure relief structure according to claim 1, characterized in that: A gasket (11) is fixedly sleeved on the outer side of the I-shaped plate (121), and the outer side of the gasket (11) is in contact with the vertical cylinder (5).

3. The explosion-proof industrial fan explosion-proof cavity rapid pressure relief structure according to claim 1, characterized in that: A flange (4) is fixedly fitted at the bottom edge of the outer side of the vertical tube (5). Multiple bolts (9) are provided on the flange (4), and the flange (4) is fixed to the explosion-proof box cavity (2) by multiple bolts (9).

4. The rapid pressure relief structure for the explosion-proof industrial fan explosion-proof cavity according to claim 1, characterized in that: Both control switches (124) are movably provided with a pressing rod (13) on their tops, and the tops of both pressing rods (13) are fixedly connected to the vertical cylinder (5).

5. The explosion-proof industrial fan explosion-proof cavity rapid pressure relief structure according to claim 1, characterized in that: An alarm (8) is fixedly connected to the top of the vertical tube (5) near one side edge.

6. The explosion-proof industrial fan explosion-proof cavity rapid pressure relief structure according to claim 1, characterized in that: The inside of the vertical cylinder (5) is fixedly connected to a partition (14), and a baffle (16) is movably provided on the top of the partition (14). A stepper motor (15) is fixedly connected to the top of the baffle (16), and the motor (15) is fixedly installed inside the vertical cylinder (5).

7. The rapid pressure relief structure for the explosion-proof industrial fan explosion-proof cavity according to claim 1, characterized in that: The top of the inner end of the vertical cylinder (5) is threaded with a threaded sleeve (6), and a pressure-resistant membrane (7) is fixedly connected inside the threaded sleeve (6).

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