Waterproof fan with explosion-proof switch

Abstract

The utility model discloses a waterproof fan with an explosion-proof switch, which relates to the technical field of fans and comprises an explosion-proof shell, a movable frame is fixedly mounted at the bottom of the explosion-proof shell, a mounting frame is fixedly mounted on the rear side in the explosion-proof shell, and a waterproof motor is fixedly mounted in the middle of the back of the mounting frame. By the adoption of the structure, the fan is provided with the quick-release fan blades, the torsional spring can be tightened by twisting the limiting frame in the use period, the sliding strip is inserted after the reserved groove corresponds to the front end of the sliding groove, the limiting frame is loosened, the torsional spring resets to drive the limiting hook to be inserted into the limiting hole to install the fan blades, and the sliding strip can be quickly pulled away through reverse operation in the disassembly process; the mounting ring is mounted by inserting a mounting plate and a second hand-screwing type screw into a positioning hole, dismounting and mounting are convenient, the interior of the fan is convenient to overhaul and clean, overall dismounting and maintenance are convenient and rapid, practicability is high, the fan is worthy of application and popularization, and the maintainability and use convenience of the fan are improved through the design.

Description

Technical Field

[0001] The utility model belongs to the technical field of fans, and particularly relates to a waterproof fan with an explosion-proof switch. Background Art

[0002] A fan is a mechanical device that converts mechanical energy into gas pressure energy and kinetic energy. It mainly consists of an impeller, a casing, an air inlet, an air outlet, a transmission device, etc. The fan makes air or other gases under the action of centrifugal force or axial force through the rotation of the impeller, thereby generating a certain pressure and flow rate. There are many types of fans. According to the gas flow direction, they can be divided into centrifugal, axial, diagonal flow, etc.; according to the use, they can be divided into ventilators, blowers, compressors, etc. Different types of fans are suitable for different occasions. For example, ventilators are mainly used for building ventilation, air conditioning systems, etc.; blowers are often used for gas transportation and combustion systems in industrial production; compressors are used to increase gas pressure to meet specific process requirements. Fans have a wide range of applications in modern industry and life. In the industrial field, fans can be used for ventilation, dust removal, cooling, pneumatic conveying, etc.;

[0003] Chinese Patent with publication number "CN212296972U" discloses an explosion-proof axial flow fan, which includes a fan explosion-proof casing. A first explosion-proof shell is provided on the outer peripheral surface of the fan explosion-proof casing, a second explosion-proof shell is provided on the outer peripheral surface of the fan explosion-proof casing, and a switch arc plate is hinged to one side of the outer wall of the fan explosion-proof casing; the first explosion-proof shell includes a first circular ring plate, one end of the first circular ring plate is fixedly connected with a first arc plate, and a first arc groove is opened on the inner peripheral surface of the same end of the first circular ring plate. The utility model wraps an explosion-proof fan explosion-proof casing outside the fan explosion-proof casing to achieve the purpose of explosion protection and protect the safety of the surrounding area. At the same time, the explosion-proof fan explosion-proof casing is designed as a detachable first explosion-proof shell and a second explosion-proof shell, which is convenient for quick disassembly and installation during maintenance, improves the maintenance efficiency, and by hinging the switch arc plate to one side of the outer wall of the fan explosion-proof casing, it makes it more convenient for maintenance personnel to repair. By installing the motor outside the fan explosion-proof casing, the blocking objects are reduced and the blowing efficiency is improved;

[0004] During the actual use of the above device, the equipped fan adopts an integrated structure design. However, there are many inconveniences in the use of this structure. First of all, when the fan needs to be repaired, disassembled or assembled, due to its integrated design, it is often difficult to achieve rapid separation, and the operation is rather cumbersome. Secondly, during the long-term use of the fan, various impurities such as dust and debris are easily attached to its surface. In view of this, it is usually necessary to disassemble and assemble the fan for cleaning. However, the integrated design of the fan and its special twisted shape make it extremely difficult to disassemble and replace on the one hand, and on the other hand, after the overall disassembly and assembly, its twisted shape will hinder the cleaning work, resulting in great inconvenience in the cleaning process. To sum up, the design of this fan has obvious defects and deficiencies, and there is an urgent need for improvement to improve its convenience and maintainability in use. Summary of the Invention

[0005] Aiming at the problems mentioned in the background technology, the purpose of the present utility model is to provide a waterproof fan with an explosion-proof switch to solve the problem that the existing device is not convenient for quickly disassembling and separating the fan, resulting in difficulty in cleaning and maintenance.

[0006] The above technical purpose of the present utility model is achieved through the following technical solutions:

[0007] A waterproof fan with an explosion-proof switch, including an explosion-proof housing, a movable frame is fixedly installed at the bottom of the explosion-proof housing, a mounting frame is fixedly installed at the rear side inside the explosion-proof housing, a waterproof motor is fixedly installed in the middle of the back surface of the mounting frame, a quick-disassembly fan blade is fixedly installed at the output end of the waterproof motor, an explosion-proof start switch is fixedly installed in the middle of the top of the explosion-proof housing, a quick-disassembly front guardrail is fixedly installed on the front surface of the explosion-proof housing, and a rear protection frame is installed on the back surface of the explosion-proof housing through bolts;

[0008] The quick-disassembly fan blade includes a rotating shaft, the rotating shaft is fixedly installed at the output end of the waterproof motor, a mounting shaft is fixedly installed at the end of the rotating shaft away from the waterproof motor, a limiting mechanism is fixedly installed at the front end of the mounting shaft, sliding grooves are equidistantly opened on the outer side of the mounting shaft, sliding bars are slidably connected inside the sliding grooves, the front ends of the sliding bars are clamped with the limiting mechanism, and fan blades are fixedly installed on the outer sides of the sliding bars.

[0009] As a preferred technical solution, the limiting mechanism includes a mounting groove and a limiting hole, the limiting hole is opened at the front end of the sliding bar, the mounting groove is opened in the middle of the front end of the mounting shaft, a torsion spring is fixedly installed inside the mounting groove, a limiting frame is fixedly installed at the front end of the torsion spring, limiting hooks are fixedly installed at equal intervals on the back surface of the limiting frame, and the ends of the limiting hooks are inserted inside the limiting hole.

[0010] As a preferred technical solution, the outer diameter of the limit hook and the overall shape of the limit hole are both arc-shaped. The outer end of the limit hook, the arc shape of the limit hole, and the torsion spring are concentric circles. The outer side of the limit frame is provided with reserved grooves at equal intervals.

[0011] As a preferred technical solution, the movable frame includes a fixed shaft, and the fixed shaft is rotatably connected to the middle of the bottom of the explosion-proof shell. Triangular brackets are fixedly installed at the outer ends of the fixed shafts.

[0012] As a preferred technical solution, a side plate is fixedly installed at the top of one triangular bracket. A first hand-tightening screw is threadedly connected to the outer side of the side plate, and the end of the first hand-tightening screw passes through the side plate and is in fit connection with the outer surface of the explosion-proof shell.

[0013] As a preferred technical solution, the quick-release front guardrail includes an installation ring. Installation plates are fixedly connected to the side of the installation ring close to the explosion-proof shell at equal intervals in a circular arrangement. A second hand-tightening screw is threadedly connected to the rear end of the installation plate. A front protection frame is fixedly installed inside the installation ring, and the end of the second hand-tightening screw is connected to the explosion-proof shell.

[0014] As a preferred technical solution, the overall cross-sectional shapes of the inside of the sliding groove and the sliding strip are both convex-shaped. Positioning holes are arranged at equal intervals in a circular arrangement at the front end of the outer side of the explosion-proof shell, and the end of the hand-tightening screw is inserted into the inside of the positioning hole.

[0015] In summary, the present utility model mainly has the following beneficial effects:

[0016] First, by setting the movable frame on this fan, the triangular brackets can be placed on the ground during use to place the explosion-proof shell. During use, the blowing direction can be adjusted by rotating the explosion-proof shell on the fixed shaft, and it is fixed with the first hand-tightening screw. The explosion-proof start switch and the explosion-proof shell have explosion-proof effects, which can improve the service life of the switch. The waterproof motor drive has waterproof performance, which is convenient for adjusting the blowing direction and is safe and reliable, can adapt to different environments, and provides stable ventilation services for users. Its unique design has obvious advantages during use, improving the practicability and durability of the fan;

[0017] Second, by setting the quick-release fan blades on this fan, during use, the torsion spring can be tightened by twisting the limit frame, so that the reserved groove corresponds to the front end of the sliding groove and then the sliding strip is inserted. When the limit frame is released, the torsion spring resets and drives the limit hook to insert into the limit hole to install the fan blade. During disassembly, the reverse operation can be used to quickly withdraw the sliding strip. The installation ring is installed by inserting the installation plate and the second hand-tightening screw into the positioning hole. The disassembly and assembly are convenient, which is convenient for internal maintenance and cleaning of the fan. The overall disassembly, assembly, maintenance are convenient and fast, and the practicability is strong, which is worthy of popularization and application. This design improves the maintainability and use convenience of the fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the overall structural schematic diagram of the present utility model;

[0019] Figure 2 is the rear structural schematic diagram of the present utility model;

[0020] Figure 3 is the structural schematic diagram of the overall disassembled state of the present utility model;

[0021] Figure 4 is the structural schematic diagram of the quick-release fan blade of the present utility model.

[0022] Reference numerals: 1, explosion-proof housing; 2, movable frame; 21, fixed shaft; 22, triangular bracket; 23, side plate; 24, first hand-tightening screw; 3, mounting frame; 4, waterproof motor; 5, quick-release fan blade; 51, rotating shaft; 52, mounting shaft; 53, chute; 54, slide bar; 55, fan blade; 56, limiting mechanism; 561, mounting groove; 562, limiting hole; 563, torsion spring; 564, limiting frame; 565, limiting hook; 566, reserved groove; 6, explosion-proof start switch; 7, quick-release front guardrail; 71, mounting ring; 72, mounting plate; 73, second hand-tightening screw; 74, positioning hole; 75, front protection frame; 8, rear protection frame. Detailed implementation manners

[0023] Embodiment

[0024] Refer to Figures 1 to 4 , a waterproof fan with an explosion-proof switch in this embodiment includes an explosion-proof housing 1. A movable frame 2 is fixedly installed at the bottom of the explosion-proof housing 1. A mounting frame 3 is fixedly installed at the rear side inside the explosion-proof housing 1. A waterproof motor 4 is fixedly installed in the middle of the back surface of the mounting frame 3. A quick-release fan blade 5 is fixedly installed at the output end of the waterproof motor 4. An explosion-proof start switch 6 is fixedly installed in the middle of the top of the explosion-proof housing 1. A quick-release front guardrail 7 is fixedly installed on the front surface of the explosion-proof housing 1. A rear protection frame 8 is installed on the back surface of the explosion-proof housing 1 through bolts;

[0025] The quick-release fan blade 5 includes a rotating shaft 51, the rotating shaft 51 is fixedly installed at the output end of the waterproof motor 4, one end of the rotating shaft 51 away from the waterproof motor 4 is fixedly installed with a mounting shaft 52, the front end of the mounting shaft 52 is fixedly installed with a limiting mechanism 56, the outer side of the mounting shaft 52 is equidistantly provided with sliding grooves 53, a slide bar 54 is slidably connected inside the sliding groove 53, the front end of the slide bar 54 is clamped with the limiting mechanism 56, and fan blades 55 are fixedly installed on the outer sides of the slide bars 54. The explosion-proof housing 1 is paired with an explosion-proof start switch 6, which greatly improves the safety of use, can effectively prevent dangerous situations such as explosions in specific environments, extends the service life of the switch, the movable frame 2 at the bottom facilitates the adjustment of the position and blowing direction of the fan, making it more flexible and convenient to use. The internal waterproof motor 4 ensures that the fan can work normally in humid environments and other environments, broadening its scope of application. The quick-release fan blade 5 is ingeniously designed. It is slidably connected through the sliding groove 53 on the mounting shaft 52 and the slide bar 54, and the quick disassembly and assembly are realized in cooperation with the limiting mechanism 56, which is convenient for internal maintenance and cleaning of the fan. The quick-release front guardrail 7 on the front and the rear protection frame 8 on the back further improve the safety and protection performance of use. Generally speaking, this fan is powerful, safe, reliable and easy to maintain.

[0026] Reference Figures 3 - 4 , the limiting mechanism 56 includes a mounting groove 561 and a limiting hole 562. The limiting hole 562 is opened at the front end of the slide bar 54, the mounting groove 561 is opened in the middle of the front end of the mounting shaft 52, a torsion spring 563 is fixedly installed inside the mounting groove 561, a limiting frame 564 is fixedly installed at the front end of the torsion spring 563, a plurality of limiting hooks 565 are fixedly installed at equal intervals on the back of the limiting frame 564, the end of the limiting hook 565 is inserted inside the limiting hole 562, the outer diameter of the limiting hook 565 and the overall shape of the limiting hole 562 are both arranged in an arc shape, the outer end of the limiting hook 565 and the arc shape of the limiting hole 562 and the torsion spring 563 are arranged in concentric circles. A plurality of reserved grooves 566 are equidistantly opened on the outer side of the limiting frame 564. The torsion spring 563 in the mounting groove 561 provides an elastic reset force for the limiting frame 564, making the operation more convenient. The limiting hooks 565 on the back of the limiting frame 564 cooperate with the limiting holes 562 at the front end of the slide bar 54, and the overall shape of the limiting hooks 565 and the limiting holes 562 is arc-shaped and arranged in concentric circles with the torsion spring 563, ensuring the stability and accuracy during rotation. When installing the fan blade 55, by rotating the limiting frame 564 to make the reserved groove 566 correspond to the front end of the sliding groove 53, after inserting the slide bar 54, release the limiting frame 564, and the torsion spring 563 resets to drive the limiting hook 565 to insert into the limiting hole 562, realizing quick and stable installation. When disassembling, the operation is equally simple, which is convenient for internal maintenance and cleaning of the fan, improving the maintainability and use convenience of the fan.

[0027] Reference Figures 1 - 3, the movable frame 2 includes a fixed shaft 21, the fixed shaft 21 is rotatably connected to the middle of the bottom of the explosion-proof housing 1, triangular brackets 22 are fixedly installed at the outer ends of the fixed shaft 21, a side plate 23 is fixedly installed at the top of one triangular bracket 22, and a first hand-tightening screw 24 is threadedly connected to the outer side of the side plate 23. The end of the first hand-tightening screw 24 passes through the side plate 23 and is in fitting connection with the outer surface of the explosion-proof housing 1. The fixed shaft 21 in the movable frame 2 is rotatably connected to the middle of the bottom of the explosion-proof housing 1, providing a basis for the flexible adjustment of the angle of the fan. The triangular brackets 22 at the outer ends of the fixed shaft 21 ensure the stability of the fan when placed on the ground. The side plate 23 at the top of one of the triangular brackets 22 and the first hand-tightening screw 24 threadedly connected to the outside can, after adjusting the blowing direction of the fan, fix the position of the fan by tightening the first hand-tightening screw 24 so that its end fits the explosion-proof housing 1. This design makes it convenient to adjust the blowing direction of the fan as a whole, meet the requirements of different usage scenarios, is simple and convenient to operate, and improves the practicability and adaptability of the fan.

[0028] Reference Figures 1 - 2 , the quick-release front guardrail 7 includes an installation ring 71. On the side of the installation ring 71 close to the explosion-proof housing 1, mounting plates 72 are fixedly connected in an equidistant annular arrangement. A second hand-tightening screw 73 is threadedly connected to the rear end of the mounting plate 72. A front protection frame 75 is fixedly installed inside the installation ring 71. The end of the second hand-tightening screw 73 is connected to the explosion-proof housing 1. The overall cross-sectional shapes of the inside of the chute 53 and the slide bar 54 are both convex-shaped. Positioning holes 74 are arranged in an equidistant annular arrangement at the front end of the outer side of the explosion-proof housing 1. The end of the hand-tightening screw is inserted into the inside of the positioning hole 74. The mounting plate 72 on one side of the installation ring 71 is connected to the explosion-proof housing 1 through the second hand-tightening screw 73, making the disassembly and assembly of the front guardrail extremely convenient. When disassembly is required, only by turning the second hand-tightening screw 73 can the operation be quickly completed, facilitating the maintenance and repair of the inside of the fan. The front protection frame 75 inside the installation ring 71 improves the safety of use and prevents dangerous situations such as personnel accidentally touching the fan blade 55. The convex-shaped cross-sectional design of the chute 53 and the slide bar 54 ensures the stability of the connection and prevents the slide bar 54 from accidentally coming out. The positioning holes 74 at the front end of the outer side of the explosion-proof housing 1 cooperate precisely with the second hand-tightening screw 73, further enhancing the firmness of the installation of the front guardrail. Generally speaking, the design of the quick-release front guardrail 7 improves the maintainability and use safety of the fan.

[0029] Principle of use and advantages: By setting up the movable frame 2, many advantages are brought to this fan during use. First of all, the triangular support 22 can be placed stably on the ground, and then the explosion-proof shell 1 of the fan can be placed securely on the ground. During use, the blowing direction of the whole fan can be conveniently adjusted by adjusting the rotation of the explosion-proof shell 1 on the fixed shaft 21. After the blowing direction is adjusted, the first hand-tightening screw 24 can be tightened to make it closely fit the explosion-proof shell 1, so as to achieve stable fixation. In this way, the blowing direction of the whole fan can be easily adjusted. Moreover, during use, the explosion-proof start switch 6 and the explosion-proof shell 1 are adopted, which can achieve excellent explosion-proof effects, greatly improving the service life at the switch. At the same time, its drive system is driven by a waterproof motor 4, making the whole fan have excellent waterproof performance and being able to operate stably in various complex environments, providing reliable ventilation services for users;

[0030] By setting up the quick-release fan blade 5, this fan performs excellently during use. First of all, by twisting the limit frame 564, the torsion spring 563 is tightened. At this time, the limit frame 564 rotates so that the reserved groove 566 corresponds to the front end of the sliding groove 53. Then, the slide bar 54 with the fan blade 55 is inserted into the inner side of the sliding groove 53. After loosening the limit frame 564, the torsion spring 563 resets and drives the limit frame 564 to rotate. The rotation of the limit frame 564 drives the limit hook 565 to rotate. Since the limit hook 565, the torsion spring 563 and the limit hole 562 are arranged in concentric circles and rotate within the same concentric circle, the limit hook 565 can be stably inserted into the inner side of the limit hole 562. Through the mutual insertion and contact of the limit hook 565 and the limit hole 562, the fan blade 55 can be stably installed. When disassembly is required, just twist the limit frame 564 in the reverse direction to drive the torsion spring 563 to tighten again. At this time, the limit frame 564 rotates so that the reserved groove 566 moves to the front end of the sliding groove 53, and at the same time the limit frame 564 drives the limit hook 565 to disengage from the limit hole 562. At this time, the slide bar 54 can be quickly pulled out from the inside of the sliding groove 53 to realize the quick disassembly and replacement of the fan blade 55. This design is convenient for internal maintenance and cleaning of the fan. Moreover, during use, the mounting ring 71 is installed by inserting the mounting plate 72 and the second hand-tightening screw 73 into the positioning hole 74. During disassembly and assembly, just twist the second hand-tightening screw 73 to quickly complete the disassembly and assembly operation. The overall disassembly, assembly and maintenance are more convenient and fast, making the whole fan outstanding in terms of practicality and convenience, and worthy of wide promotion and application.

Claims

1. A waterproof fan with an explosion-proof switch, comprising an explosion-proof housing, characterized in that: A movable frame is fixedly installed at the bottom of the explosion-proof shell. An installation frame is fixedly installed at the rear side inside the explosion-proof shell. A waterproof motor is fixedly installed in the middle of the back surface of the installation frame. A quick-release fan blade is fixedly installed at the output end of the waterproof motor. An explosion-proof start switch is fixedly installed in the middle of the top of the explosion-proof shell. A quick-release front guardrail is fixedly installed on the front surface of the explosion-proof shell. A rear protection frame is installed on the back surface of the explosion-proof shell by bolts; The quick-release fan blade includes a rotating shaft, the rotating shaft is fixedly installed at the output end of the waterproof motor, an installation shaft is fixedly installed at the end of the rotating shaft away from the waterproof motor, a limiting mechanism is fixedly installed at the front end of the installation shaft, a sliding groove is equidistantly opened on the outer side of the installation shaft, a sliding strip is slidably connected inside the sliding groove, the front end of the sliding strip is clamped with the limiting mechanism, and fan blades are fixedly installed on the outer sides of the sliding strips.

2. The waterproof fan with an explosion-proof switch according to claim 1, characterized in that: The limiting mechanism includes an installation groove and a limiting hole. The limiting hole is opened at the front end of the sliding strip. The installation groove is opened in the middle of the front end of the installation shaft. A torsion spring is fixedly installed on the inner side of the installation groove. A limiting frame is fixedly installed at the front end of the torsion spring. Limiting hooks are fixedly installed at equal intervals on the back surface of the limiting frame. The end of the limiting hook is inserted into the inner side of the limiting hole.

3. The waterproof fan with an explosion-proof switch according to claim 2, characterized in that: The outer diameter of the limiting hook and the overall shape of the limiting hole are both circular arc-shaped. The arc shape of the outer end of the limiting hook and the limiting hole and the torsion spring are concentric circles. Reserved grooves are equidistantly opened on the outer side of the limiting frame.

4. The waterproof fan with an explosion-proof switch according to claim 1, wherein: The movable frame includes a fixed shaft, the fixed shaft is rotatably connected to the middle of the bottom of the explosion-proof shell, and triangular brackets are fixedly installed at the outer ends of the fixed shaft.

5. The waterproof fan with an explosion-proof switch according to claim 4, wherein: A side plate is fixedly installed at the top of one triangular bracket. A first hand-tightening screw is threadedly connected to the outer side of the side plate. The end of the first hand-tightening screw passes through the side plate and is in fit connection with the outer surface of the explosion-proof shell.

6. The waterproof fan with an explosion-proof switch according to claim 1, characterized in that: The quick-release front guardrail includes an installation ring. Installation plates are fixedly connected in an annular arrangement at equal intervals on the side of the installation ring close to the explosion-proof shell. A second hand-tightening screw is threadedly connected to the rear end of the installation plate. A front protection frame is fixedly installed inside the installation ring. The end of the second hand-tightening screw is connected to the explosion-proof shell.

7. The waterproof fan with an explosion-proof switch according to claim 6, characterized in that: The overall cross-sectional shapes of the inside of the sliding groove and the sliding strip are both convex-shaped. Positioning holes are opened in an annular arrangement at equal intervals at the front end of the outer side of the explosion-proof shell. The end of the hand-tightening screw is inserted into the inner side of the positioning hole.

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