Civil air defense mixed flow fan flexible in piping

Abstract

The utility model discloses a civil air defense mixed flow fan with flexible piping, which comprises a base, a rotating seat is arranged on the base, air ducts and supports for fixing the air ducts are symmetrically and fixedly arranged on two sides of the base, a fan main body is arranged on the rotating seat, and connecting mechanisms are symmetrically arranged on the base and positioned on two sides of the fan main body. A telescopic assembly is movably arranged between one side of the connecting mechanism and an air opening of the air duct. The connecting sleeve is simple in structure and reasonable in design, rapid butt joint of the connecting sleeve and the fan body is achieved, a large number of connecting bolts do not need to be disassembled manually, manual intervention of workers is not needed for carrying and alignment, the speed and efficiency of air inlet and exhaust working state switching of the mixed flow fan are remarkably improved, and the working efficiency of the mixed flow fan is improved. And meanwhile, when the connecting sleeve rotates and horizontally moves, communication between the air channel and the connecting sleeve is kept, and the working efficiency of the connecting mechanism is further guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of fan equipment, in particular to a civil air defense mixed flow fan with flexible piping. Background Art

[0002] The primary function of a mixed flow fan in a civil air defense facility is to deliver fresh air, remove harmful gases, create a safe environment, and meet the requirements of civil air defense projects. In actual use, the fan has an air intake and an exhaust port. To expel harmful gases from a room, the mixed flow fan's air intake is connected to an indoor duct port, and its exhaust port is connected to an outdoor duct port. To bring outdoor air indoors, the mixed flow fan's air intake is connected to an outdoor duct port, and its exhaust port is connected to an indoor duct port.

[0003] Deficiencies of existing technology:

[0004] Currently, common mixed flow fans and pipes are generally connected by bolts. When switching the fan's intake and exhaust working states, workers need to manually remove the bolts, then rotate the fan body, and finally connect the intake and exhaust pipes to the intake and exhaust ends of the rotated mixed flow fan. Because this operation method mainly relies on manual work, it requires the removal and installation of a large number of connecting bolts during actual operation, which is time-consuming. In addition, the pipes themselves are heavy, making them inconvenient to carry and align. As a result, the work efficiency is low and it is difficult to meet the current more stringent actual use requirements. Utility Model Content

[0005] The purpose of the utility model is to provide a mixed flow fan for civil air defense with flexible piping, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a mixed flow fan for civil air defense with flexible piping, comprising a base, a rotating base provided on the base, air ducts and brackets for fixing the air ducts symmetrically fixedly provided on both sides of the base, a fan body provided on the rotating base, connecting mechanisms symmetrically provided on both sides of the fan body on the base, a telescopic assembly movably provided between one side of the connecting mechanism and the air outlet of the air duct;

[0007] The connecting mechanism includes:

[0008] A mounting frame is provided on the upper end surface of the base and on both sides of the fan body, wherein the inner side of the mounting frame is threadedly connected to a connecting sleeve, and the end of the connecting sleeve matches the air outlet of the fan body;

[0009] The drive motor is arranged on both sides of the base, the output end of the drive motor is connected to the drive gear, and the side of the connecting sleeve away from the fan body is provided with a rack matching the drive gear.

[0010] Preferably, the telescopic assembly includes:

[0011] A connecting ring, the connecting ring being movably arranged on one side of the connecting sleeve, the side of the connecting ring away from the connecting sleeve being connected to a hose, the other end of the hose being connected to the air outlet of the air duct;

[0012] The telescopic sleeve is arranged on the inner side of the bracket, and a telescopic rod is arranged on the ring wall of the connecting ring and on the outer side of the hose, and the telescopic rod is slidably connected to the telescopic sleeve.

[0013] Preferably, the end portion of the connecting sleeve that interfaces with the air outlet of the fan body is trumpet-shaped.

[0014] Preferably, one side of the connecting ring is rotatably connected to the connecting sleeve by providing a sliding groove.

[0015] Preferably, the hose is a PVC aluminum foil composite hose.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] The flexible piping civil air defense mixed flow fan is provided with a connection mechanism, which includes a mounting frame, a connection sleeve, a drive motor, a drive gear and a rack, so that the connection sleeve and the fan body can be quickly connected. There is no need to manually remove a large number of connection bolts, and no need for manual intervention by staff for handling and alignment. The speed and efficiency of the mixed flow fan when switching between the intake and exhaust working states are significantly improved, and it better meets the actual use needs of current users.

[0018] This civil air defense mixed flow fan with flexible piping is provided with a telescopic component, which includes a connecting ring, a hose, a telescopic sleeve and a telescopic rod. It can maintain the connection between the air duct and the connecting sleeve when the connecting sleeve rotates and moves horizontally, and further ensure the working efficiency of the connecting mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is the overall front view of the utility model;

[0020] Figure 2 This is a schematic diagram of the internal structure of the utility model;

[0021] Figure 3 This is a schematic diagram of the internal structure of the fan body and the connecting sleeve when they are connected;

[0022] Figure 4This is a schematic diagram of the engagement between the drive gear and the rack of the utility model;

[0023] Figure 5 For the utility model Figure 2 A magnified schematic diagram at point A in FIG.

[0024] In the figure: 1. Base; 2. Rotating seat; 3. Air duct; 301. Bracket; 4. Fan body; 5. Connecting mechanism; 501. Mounting frame; 502. Connecting sleeve; 503. Drive motor; 504. Drive gear; 505. Rack; 6. Telescopic assembly; 601. Connecting ring; 602. Hose; 603. Telescopic sleeve; 604. Telescopic rod. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 on the present invention.

[0027] In the description of this patent, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "disposed" should be understood broadly. For example, they can refer to fixed connection or disposition, detachable connection or disposition, or integrated connection or disposition. Those skilled in the art will understand the specific meanings of the above terms in this patent based on the specific circumstances.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "several" means two or more, unless otherwise specifically defined. Example

[0029] See also Figure 1-5 As shown, the present invention provides a technical solution for a mixed flow fan for civil air defense with flexible piping: a mixed flow fan for civil air defense with flexible piping, comprising a base 1, a rotating base 2 mounted on the base 1, air ducts 3 and brackets 301 for fixing the air ducts 3 symmetrically fixed on both sides of the base 1, a fan body 4 mounted on the rotating base 2, two air ducts 3 respectively connected to the air inlet and air outlet of the fan body 4, a connecting mechanism 5 symmetrically mounted on both sides of the fan body 4 on the base 1, a telescopic assembly 6 movably mounted between one side of the connecting mechanism 5 and the air outlet of the air duct 3. The connecting mechanism 5 comprises a mounting bracket 501 and a drive motor 503. The mounting bracket 501 is mounted on the upper end surface of the base 1 on both sides of the fan body 4, a connecting sleeve 502 is threadedly connected to the inner side of the mounting bracket 501, and the end of the connecting sleeve 502 matches the air outlet of the fan body 4. The drive motor 503 is installed on both sides of the base 1 through the motor frame. The output end of the drive motor 503 is connected to the drive gear 504. A rack 505 matching the drive gear 504 is installed on the side of the connecting sleeve 502 away from the fan body 4.

[0030] When the civil air defense mixed flow fan is in operation, the two air ducts 3 are connected to the air inlet and outlet ends of the fan body 4, respectively, for air intake and exhaust. The air outlets on both sides of the fan body 4 are docked with the ports of the connecting sleeve 502. When the fan's air intake and exhaust operating states need to be switched, the drive motor 503 is activated to rotate the drive gear 504, which in turn drives the connecting sleeve 502 via the rack 505. Since the connecting sleeve 502 is threadedly connected to the mounting bracket 501, the connecting sleeve 502 rotates while also moving horizontally due to the threaded connection with the mounting bracket 501, separating from the fan body 4 and simultaneously contracting the telescopic assembly 6. The rack 505 and the drive gear 504 slide and rub against each other synchronously while meshing, so the surfaces of the rack 505 and the drive gear 504 must be kept lubricated. After the connecting sleeve 502 moves a specified distance, the rotating base 2 drives the fan body 4 to rotate 180 degrees. The drive motor 503 is then restarted to rotate in the opposite direction. The drive motor 503 then drives the connecting sleeve 502 to move back toward the fan body 4 via the drive gear 504 and rack 505. At the same time, the telescopic assembly 6 extends until the connecting sleeve 502 re-docking with the fan body 4. At this point, the mixed flow fan's air intake and exhaust operating state transition is complete. The connecting mechanism 5 allows for rapid docking of the connecting sleeve 502 with the fan body 4, eliminating the need for manual removal of numerous connecting bolts and manual handling and alignment by staff. This significantly improves the speed and efficiency of the mixed flow fan's air intake and exhaust operating state transition, better meeting the actual needs of current users.

[0031] The telescopic assembly 6 includes a connecting ring 601 and a telescopic sleeve 603. The connecting ring 601 is movably mounted on one side of the connecting sleeve 502. A hose 602 is connected to the side of the connecting ring 601 away from the connecting sleeve 502. The other end of the hose 602 is connected to the air outlet of the air duct 3. The telescopic sleeve 603 is mounted on the inner side of the bracket 301. A telescopic rod 604 is mounted on the ring wall of the connecting ring 601, outside the hose 602. The telescopic rod 604 is slidably connected to the telescopic sleeve 603. When the connecting sleeve 502 rotates and moves horizontally, the connecting ring 601, due to the limiting action of the telescopic rod 604 and the telescopic sleeve 603, will not rotate synchronously with the connecting sleeve 502. Instead, it will move horizontally, and the telescopic rod 604 will slide synchronously within the telescopic sleeve 603. When the connecting ring 601 moves horizontally, the hose 602 will contract or expand in time, ensuring a stable connection between the connecting sleeve 502 and the air duct 3. By means of the telescopic assembly 6 , it is achieved that the connection between the air duct 3 and the connecting sleeve 502 is maintained when the connecting sleeve 502 rotates and moves horizontally, thereby further ensuring the working efficiency of the connecting mechanism 5 .

[0032] The end portion of the connecting sleeve 502 that docks with the air outlet of the fan body 4 is trumpet-shaped. Since the trumpet-shaped outer opening is larger, the possibility of collision is reduced, and the docking of the connecting sleeve 502 and the fan body 4 is more convenient, with a higher fault tolerance rate.

[0033] One side of the connecting ring 601 is rotatably connected to the connecting sleeve 502 by providing a sliding groove. The provision of the sliding groove can make the relative rotation between the connecting ring 601 and the connecting sleeve 502 more stable.

[0034] Hose 602 is a PVC-aluminum foil composite hose. The PVC-aluminum foil composite hose not only has a long service life, but also has excellent high temperature resistance and corrosion resistance, which is more suitable for the working scenario of civil air defense mixed flow fans.

[0035] 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 to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A mixed flow fan for civil air defense with flexible piping, comprising a base (1), a rotating seat (2) provided on the base (1), air ducts (3) and brackets (301) for fixing the air ducts (3) symmetrically fixed on both sides of the base (1), characterized in that: A fan body (4) is provided on the rotating seat (2), connecting mechanisms (5) are symmetrically provided on both sides of the fan body (4) on the base (1), and a telescopic component (6) is movably provided between one side of the connecting mechanism (5) and the air outlet of the air duct (3); The connecting mechanism (5) includes: A mounting frame (501), the mounting frame (501) being arranged on the upper end surface of the base (1) and located on both sides of the fan body (4), the inner side of the mounting frame (501) being threadedly connected to a connecting sleeve (502), the end of the connecting sleeve (502) being matched with the air outlet of the fan body (4); A drive motor (503) is provided on both sides of the base (1); an output end of the drive motor (503) is connected to a drive gear (504); and a rack (505) matching the drive gear (504) is provided on a side of the connecting sleeve (502) away from the fan body (4).

2. The mixed flow fan with flexible piping for civil air defense according to claim 1, characterized in that: The telescopic assembly (6) includes: A connecting ring (601), the connecting ring (601) being movably arranged on one side of the connecting sleeve (502), a side of the connecting ring (601) away from the connecting sleeve (502) being connected to a hose (602), and the other end of the hose (602) being connected to the air outlet of the air duct (3); A telescopic sleeve (603) is provided on the inner side of the bracket (301); a telescopic rod (604) is provided on the ring wall of the connecting ring (601) and located outside the hose (602); the telescopic rod (604) is slidably connected to the telescopic sleeve (603).

3. The mixed flow fan with flexible piping for civil air defense according to claim 1, characterized in that: The end portion of the connecting sleeve (502) that interfaces with the air outlet of the fan body (4) is trumpet-shaped.

4. The mixed flow fan with flexible piping for civil air defense according to claim 2, characterized in that: One side of the connecting ring (601) is rotatably connected to the connecting sleeve (502) by providing a sliding groove.

5. The mixed flow fan with flexible piping for civil air defense according to claim 2, characterized in that: The hose (602) is a PVC aluminum foil composite hose.

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