Rain cover of axial flow fan

Abstract

The utility model relates to the field of rain covers, in particular to an axial flow fan rain cover which comprises a rain cover body, a threaded sleeve is fixedly installed on the inner side of the rain cover body, a threaded rod is connected to the inner side of the threaded sleeve in a threaded mode, a transverse plate is rotationally connected to the bottom of the threaded rod through a bearing, and a water retaining sleeve is fixedly connected to the bottom of the transverse plate. The rain cover comprises a rain cover main body, a shutter is arranged in the rain cover main body, a water retaining sleeve is arranged in the inner cavity of the rain cover main body, a slope sleeve is fixedly sleeved on the outer layer of the water retaining sleeve, a sealing gasket is fixedly connected with the bottom of the water retaining sleeve and the bottom of the slope sleeve, and a plurality of groups of drainage holes are formed in the lower end of the rain cover main body. At the moment, rainwater can be prevented from entering the through hole formed in the roof through the water retaining sleeve and the sealing gasket, meanwhile, the rainwater entering the inner cavity of the rainproof cover body can extend the slope of the slope sleeve to flow downwards through the slope sleeve, and finally the rainwater can be drained out of the drainage hole.

Description

Technical Field

[0001] The utility model relates to the field of rainproof covers, in particular to a rainproof cover for an axial flow fan. Background Art

[0002] Axial flow fans are widely used. They are fans that move air in the same direction as the axis of the fan blades. For example, electric fans and air conditioner outdoor fans are fans that operate in axial flow mode. They are called "axial flow" because the gas flows parallel to the fan axis. Axial flow fans are devices for ventilation and heat exchange, and are generally used in factories, warehouses, equipment soundproof rooms and other places. Usually, a through hole is opened on the top of the house, and the axial flow fan is fixedly installed in the through hole. This makes it easy for the house to leak when it rains. In order to prevent leakage, a rainproof device is installed on the roof of the house to prevent rain. For example, a rainproof and silencer device for a rooftop axial flow fan with publication number CN217814178U comprises a box body, which is a rectangular structure with an open surface, an opening is provided on the roof, an axial flow fan is provided at the opening, the open surface of the box body is placed above the opening, and at least one shutter is provided on each of the four sides of the box body. A sound-absorbing layer is provided on the inner wall of the box body where the shutter is not provided.

[0003] When the above device is in use, if rainwater enters the box, although the water retaining layer can block the water from entering the opening on the roof, the rainwater is still in the inner cavity of the box. When the water in the box accumulates more and more and the water level is higher than the water retaining layer, the water will still enter the opening on the roof. For this reason, we propose an axial flow fan rain cover. Utility Model Content

[0004] The utility model aims to provide a rain cover for an axial flow fan, a rain cover for an axial flow fan, comprising a rain cover body, a threaded sleeve fixedly installed on the inner side of the rain cover body, a screw threadedly connected to the inner side of the threaded sleeve, a cross plate rotatably connected to the bottom of the screw through a bearing, a water retaining sleeve fixedly connected to the bottom of the cross plate, a ramp sleeve fixedly covered on the outer layer of the water retaining sleeve, a sealing gasket fixedly connected to the bottom of the water retaining sleeve and the ramp sleeve, and a plurality of drainage holes are provided at the lower end of the rain cover body.

[0005] Preferably, the rain cover body comprises a sound-conducting layer, a wooden sound-absorbing board layer is fixedly sleeved on the outer side of the sound-conducting layer, and a rainproof outer layer is fixedly sleeved on the outer side of the wooden sound-absorbing board layer.

[0006] Preferably, a hand wheel is fixedly connected to the top end of the screw rod.

[0007] Preferably, the outer layer of the screw rod is slidably connected with two sets of sealing sleeves 1, and the two sets of sealing sleeves 1 are respectively fixedly connected to the top of the rain cover body and the top of the inner wall of the rain cover body.

[0008] Preferably: two groups of guide rods are fixedly connected to the top of the horizontal plate, and the top of the guide rods slides through the inner side of the rain shield body, and two groups of sealing sleeves 2 are slidably connected to the outer sides of the two groups of guide rods, and the four groups of sealing sleeves 2 are respectively fixedly connected to the top of the rain shield body and the top of the inner wall of the rain shield body.

[0009] Preferably, the rain cover body is fixedly installed on the top of the roof.

[0010] Preferably, the rain shield body is a rectangular parallelepiped structure with an open bottom, and at least one shutter is provided on each of the four side surfaces of the rain shield body, and the shutter faces the outside of the rain shield body and is inclined downward.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] When the utility model is in use, rainwater is blocked by the rain cover body. If some rainwater enters the inner cavity of the rain cover body through the shutters, the water retaining sleeve and the sealing pad will block the rainwater from entering the through hole opened in the roof. At the same time, the slope sleeve allows the rainwater entering the inner cavity of the rain cover body to extend the slope of the slope sleeve to flow downward and eventually be discharged from the drainage hole. During installation, the entire device is placed at a suitable position on the roof, and the hand wheel is turned to drive the screw rod to rotate. The rotation of the screw rod drives the horizontal plate to move downward. The downward movement of the horizontal plate drives the water retaining sleeve to move downward. The downward movement of the water retaining sleeve drives the sealing pad to move downward, so that the bottom of the sealing pad is tightly fitted with the top of the roof to achieve sealing and prevent water seepage. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model.

[0014] In the figure: 1. rain cover body; 101. sound guide layer; 102. wooden sound absorbing board layer; 103. rainproof outer layer; 2. threaded sleeve; 3. screw; 4. cross plate; 5. water retaining sleeve; 6. slope sleeve; 7. sealing gasket; 8. drainage hole; 9. hand wheel; 10. sealing sleeve one; 11. guide rod; 12. sealing sleeve two; 13. roof; 14. shutter. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] See also Figure 1The figure shows a rain cover for an axial flow fan of the utility model, comprising a rain cover body 1, a threaded sleeve 2 is fixedly installed on the inner side of the rain cover body 1, a screw 3 is threadedly connected to the inner side of the threaded sleeve 2, a cross plate 4 is rotatably connected to the bottom of the screw 3 through a bearing, a water retaining sleeve 5 is fixedly connected to the bottom of the cross plate 4, an outer fixed sleeve of the water retaining sleeve 5 is provided with a slope sleeve 6, a sealing gasket 7 is fixedly connected to the bottom of the water retaining sleeve 5 and the slope sleeve 6, and a plurality of drainage holes 8 are provided at the lower end of the rain cover body 1.

[0017] The rain cover body 1 includes a sound guide layer 101, a wooden sound absorbing board layer 102 is fixedly sleeved on the outside of the sound guide layer 101, and a rainproof outer layer 103 is fixedly sleeved on the outside of the wooden sound absorbing board layer 102. When the noise generated by the use of the axial flow fan is transmitted to the rain cover body 1, the sound guide layer 101 will transmit the noise to the wooden sound absorbing board layer 102, so that the noise is absorbed by the wooden sound absorbing board layer 102, thereby reducing the impact of the noise on the surrounding environment.

[0018] The top of the screw rod 3 is fixedly connected with a hand wheel 9. During installation, the entire device is placed at a suitable position on the roof 13. The hand wheel 9 is turned to drive the screw rod 3 to rotate. The rotation of the screw rod 3 drives the cross plate 4 to move downward. The downward movement of the cross plate 4 drives the water retaining sleeve 5 to move downward. The downward movement of the water retaining sleeve 5 will drive the sealing gasket 7 to move downward, so that the bottom of the sealing gasket 7 fits tightly with the top of the roof 15 to achieve sealing and prevent water seepage. It should be noted that although the cross plate 4 is fixedly installed on the top of the water retaining sleeve 5, the cross plate 4 will not completely seal the top of the water retaining sleeve 5. There is a gap between the water retaining sleeve 5 and the cross plate 4 to facilitate air circulation.

[0019] The outer layer of the screw rod 3 is slidably connected with two sets of sealing sleeves 10, and the two sets of sealing sleeves 10 are respectively fixedly connected to the top of the rain cover body 1 and the top of the inner wall of the rain cover body 1. The two sets of sealing sleeves 10 are provided to play a sealing role to prevent water seepage.

[0020] Two groups of guide rods 11 are fixedly connected to the top of the cross plate 4, and the top of the guide rods 11 slides through the inner side of the rain cover body 1. Two groups of sealing sleeves 12 are slidably connected to the outer sides of the two groups of guide rods 11. The four groups of sealing sleeves 12 are respectively fixedly connected to the top of the rain cover body 1 and the top of the inner wall of the rain cover body 1. The two groups of guide rods 11 are provided to provide guidance for the up and down movement of the water retaining sleeve 5; the sealing sleeves 12 are provided to play a sealing role and prevent water seepage.

[0021] The rain cover body 1 is fixedly mounted on the top of the roof 13. During installation, the entire device needs to be placed at a suitable position on the roof 13 so that the rain cover body 1 can cover the through hole opened on the roof 13, and an axial flow motor is installed in the through hole opened on the roof 13.

[0022] The rain shield body 1 is a rectangular parallelepiped structure with an open bottom. At least one shutter 14 is provided on each of the four sides of the rain shield body 1. The shutter 14 faces the outside of the rain shield body 1 and is inclined downward. The shutter 14 can prevent rainwater from entering the inner cavity of the rain shield body 1, and the shutter 14 does not affect air circulation.

[0023] Working principle of the utility model: when installing, place the whole device on the appropriate position of the roof 13, turn the hand wheel 9 to drive the screw 3 to rotate, the screw 3 rotates to drive the horizontal plate 4 to move downward, the horizontal plate 4 moves downward to drive the water retaining sleeve 5 to move downward, the water retaining sleeve 5 moves downward to drive the sealing gasket 7 to move downward, so that the bottom of the sealing gasket 7 fits tightly with the top of the roof 15 to achieve sealing and prevent water seepage; on rainy days, the rain cover body 1 blocks rainwater, and if some rainwater enters the rain cover body 1 through the shutter 14 In the cavity, the water retaining sleeve 5 and the sealing gasket 7 will prevent rainwater from entering the through hole opened in the roof 13. At the same time, the slope sleeve 6 allows the rainwater entering the inner cavity of the rain shield body 1 to extend the slope of the slope sleeve 6 and flow downward, and finally be discharged from the drainage hole 8; when the noise generated by the use of the axial flow fan is transmitted to the rain shield body 1, the sound guiding layer 101 will transmit the noise to the wooden sound absorbing board layer 102, thereby absorbing the noise through the wooden sound absorbing board layer 102, thereby reducing the impact of the noise on the surrounding environment.

[0024] The above content is a further detailed description of the utility model in combination with specific implementation methods. It cannot be determined that the specific implementation of the utility model is limited to these descriptions. For ordinary technicians in the technical field to which the utility model belongs, without departing from the concept of the utility model, they can also make several simple deductions or substitutions, which should be regarded as belonging to the scope of protection determined by the claims submitted for the utility model.

Claims

1. An axial flow fan rain cover, comprising a rain cover body (1), characterized in that: A threaded sleeve (2) is fixedly installed on the inner side of the rain cover body (1), a screw rod (3) is threadedly connected to the inner side of the threaded sleeve (2), a transverse plate (4) is rotatably connected to the bottom of the screw rod (3) via a bearing, a water retaining sleeve (5) is fixedly connected to the bottom of the transverse plate (4), an outer fixed sleeve of the water retaining sleeve (5) is fixedly sleeved with a ramp sleeve (6), a sealing gasket (7) is fixedly connected to the bottom of the water retaining sleeve (5) and the ramp sleeve (6), and a plurality of drainage holes (8) are provided at the lower end of the rain cover body (1).

2. The axial flow fan rain cover according to claim 1, characterized in that: The rain cover body (1) comprises a sound-conducting layer (101), a wooden sound-absorbing board layer (102) is fixedly sleeved on the outside of the sound-conducting layer (101), and a rainproof outer layer (103) is fixedly sleeved on the outside of the wooden sound-absorbing board layer (102).

3. The axial flow fan rain cover according to claim 1, characterized in that: The top end of the screw rod (3) is fixedly connected with a hand wheel (9).

4. The axial flow fan rain cover according to claim 1, characterized in that: The outer layer of the screw rod (3) is slidably connected to two sets of sealing sleeves (10), and the two sets of sealing sleeves (10) are respectively fixedly connected to the top of the rain cover body (1) and the top of the inner wall of the rain cover body (1).

5. The axial flow fan rain cover according to claim 1, characterized in that: Two groups of guide rods (11) are fixedly connected to the top of the transverse plate (4), and the top of the guide rods (11) slides through the inner side of the rain cover body (1), and two groups of sealing sleeves (12) are slidably connected to the outer sides of the two groups of guide rods (11), and the four groups of sealing sleeves (12) are respectively fixedly connected to the top of the rain cover body (1) and the top of the inner wall of the rain cover body (1).

6. The axial flow fan rain cover according to claim 1, characterized in that: The rain cover body (1) is fixedly mounted on the top of the roof (13).

7. The axial flow fan rain cover according to claim 1, characterized in that: The rain shield body (1) is a rectangular parallelepiped structure with an open bottom. The four sides of the rain shield body (1) are each provided with at least one shutter (14), and the shutter (14) faces the outside of the rain shield body (1) and is inclined downward.

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