Unpowered three-proofing negative pressure hood

Abstract

The utility model discloses an unpowered three-proofing negative pressure hood, which comprises a base, the lower supporting piece is detachably mounted on the inner wall of the base; the lower end of the screw rod is arranged in the lower supporting piece; the upper supporting piece is rotationally arranged at the upper end of the screw rod; the air exhaust cap assembly is arranged at the top of the upper supporting piece and drives the upper supporting piece to rotate, and then negative pressure air exhaust is formed; the inverted-cone-shaped air guide hopper is arranged in the three-proofing negative-pressure air cap and connected with the top cap of the air exhaust cap assembly, during smoke exhaust or air exchange, no dead-angle resistance exists on the top, smoke and the like are smoothly and rapidly diffused and exhausted to the periphery along the outer wall of the inverted-cone-shaped air guide hopper, the time of the smoke and the like staying in the air cap is shortened, an unpowered structure is effectively formed, and the service life of the air exhaust cap assembly is prolonged. The airflow pushes the arc-shaped air guide blades to rotate, so that smoke exhaust and air exchange can be more efficient; and the whole hood is approximately of a cylindrical structure, the wind resistance is small, air can be exhausted more quickly, and the hood is small in size and convenient to install.

Description

Technical Field

[0001] This utility model relates to the field of non-powered three-proof negative pressure hood technology, specifically to a non-powered three-proof negative pressure hood. Background Technology

[0002] A non-powered ventilator (also known as a spherical ventilator or vortex ventilator) utilizes the natural wind speed to drive the turbine rotation of a fan and the principle of indoor and outdoor air convection. It accelerates and transforms any parallel airflow into a vertical upward airflow, thus improving indoor ventilation. It requires no electricity, operates silently, and can run continuously, removing heat, moisture, and pollutants from the room. Based on natural airflow principles, it is rationally installed on the top of the roof to quickly expel hot and polluted air, improving the indoor environment.

[0003] Chinese utility model patent application number 202310503885.6 discloses a non-powered ventilator cap for exhaust channels with good airflow control. The cap includes a connecting ring, a support frame, a connecting glass cylinder, a gasket, a combined sleeve, a protrusion, and a fitting assembly. The upper end of the connecting ring is fixedly connected to the ventilator body. The support frame is cross-shaped and fixedly connected inside the connecting ring. The upper end of the connecting glass cylinder is fixedly connected to the lower end of the connecting ring. The gasket is fixedly connected to the lower end of the connecting glass cylinder. The combined sleeve is fixedly connected to the lower surface of the gasket, and the edge of the combined sleeve is cylindrical. The upper end of the combined sleeve extends inward. The protrusion is fixedly connected to the lower surface of the inwardly extending end of the combined sleeve. However, this ventilator cap lacks an internal airflow guiding mechanism, resulting in slow exhaust.

[0004] Therefore, there is an urgent need for a non-powered, three-proof negative pressure hood to address the technical problems described above. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the defects of the above-mentioned technology and provide a non-powered three-proof negative pressure wind cap.

[0006] To solve the above-mentioned technical problems, the technical solution provided by this utility model is a non-powered, three-proof negative pressure hood, comprising:

[0007] Base;

[0008] The lower support member is detachably installed on the inner wall of the base;

[0009] The screw, the lower end of which is disposed inside the lower support member;

[0010] An upper support member is rotatably mounted on the upper end of the screw.

[0011] An exhaust cap assembly is disposed on the top of the upper support member, which drives the upper support member to rotate, thereby forming negative pressure exhaust;

[0012] The upper support component includes a central bearing, a central fixing component, an upper sleeve, an inverted conical air guide hopper, and a top support component. The central bearing is located in the middle of the screw. The central fixing component is sleeved on the outside of the central bearing. The inverted conical air guide hopper is sleeved on the outside of the screw, and its lower end is sleeved on the central fixing component. The lower end of the central fixing component is threaded, and a nut is connected to the central fixing component via the thread. The nut abuts against the lower end of the inverted conical air guide hopper to fix it. The upper sleeve is sleeved on the screw and is located above the central fixing component. The upper sleeve has a through hole that penetrates the upper sleeve and the screw. A pin connecting the upper sleeve and the screw is provided in the through hole. The top support component contains a top fixing component. The upper sleeve, the screw, and the top fixing component are connected and fitted together.

[0013] The exhaust cap assembly is installed on the upper part of the inverted conical air guide and the top support.

[0014] As an improvement, the top fixing component is a combination of a top head, a base with an arc groove, and a cap. The top head is located inside the upper end of the upper sleeve, and the lower end of the top head is located at the upper end of the screw. The top support component is set above the top head. The top support component has a base with an arc groove inside. The upper end of the top head is located in the arc groove of the base with an arc groove and is rotatably engaged with the base with an arc groove. The upper end of the top support component has a circular hole, and an exhaust cap assembly extends from the upper part of the circular hole. The base with an arc groove has an external thread, and the upper end of the base with an arc groove extends out from the circular hole. The cap is threaded to the upper end of the base with an arc groove. A nut is provided on the part of the base with an arc groove located inside the top support component. A rain cover is fitted over the upper end of the base with an arc groove and the outside of the cap.

[0015] As an improvement, the top fixing member is an upper fixing member. The upper end of the upper fixing member is located inside the top support member. A bearing is provided inside the upper fixing member. The upper end of the screw is located inside the upper fixing member and placed inside the bearing. The lower end of the upper fixing member is provided with an external thread. A nut is connected to the upper fixing member through the thread. The nut and the lower part of the upper fixing member abut against the upper end of the upper sleeve to limit the movement of the upper sleeve.

[0016] As an improvement, the exhaust cap assembly includes a top cap, a lower connector, and arc-shaped guide vanes. The middle part of the top cap is connected to the top support via a pin. The upper end of the inverted conical air guide hopper is connected to the top cap via a pin. Multiple arc-shaped guide vanes are evenly arranged at the lower end of the top cap. The multiple arc-shaped guide vanes are inclinedly arranged on the top cap, and an air duct is formed between each pair of arc-shaped guide vanes. The arc-shaped guide vanes are located outside the inverted conical air guide hopper. The lower connector and the lower end of the top cap are connected via pins.

[0017] As an improvement, the lower connector is located above the base and has a gap between it and the base.

[0018] As an improvement, the inverted conical air guide and the central fixing member are connected by screws.

[0019] As an improvement, the lower support includes a support plate and a fixing member. The fixing member is disposed outside the screw, and multiple slots are evenly provided on the outer periphery of the fixing member. One end of the support plate is disposed in the slot, and the other end of the support plate is connected to the inner wall of the base by a rivet.

[0020] As an improvement, the fixing components are a lower sleeve and a limiting nut. The lower sleeve is fitted onto the lower end of the screw, and the upper and lower ends of the upper and lower sleeves of the screw are provided with limiting nuts to fix the lower sleeve. The slot is provided on the outer periphery of the lower sleeve.

[0021] As an improvement, the fastener is an internally threaded tube, which is threadedly connected to the lower part of the screw, and the slot is provided on the outer periphery of the internally threaded tube of the lower sleeve.

[0022] The advantages of this utility model compared with the prior art are as follows:

[0023] 1. The three-proof negative pressure hood is equipped with an inverted cone-shaped air guide duct inside, which is connected to the top cap of the exhaust hood assembly. When exhausting smoke or exchanging air, there is no dead corner resistance at the top, which allows the smoke and other gases to spread smoothly and quickly along the outer wall of the inverted cone-shaped air guide duct to the surrounding area. This reduces the time that the smoke and other gases stay inside the hood, effectively forming a non-powered structure. The airflow drives the arc-shaped air guide blades to rotate, which can exhaust smoke and exchange air more efficiently.

[0024] 2. Moreover, the wind cap has a roughly cylindrical structure, which reduces wind resistance and allows for faster exhaust. It is also small in size and easy to install.

[0025] 3. The inverted cone-shaped air guide hopper and the top cap of the exhaust hood assembly are connected to form a support, making the exhaust hood assembly more stable. Attached Figure Description

[0026] Figure 1 This is a front view of Embodiment 1 of the non-powered three-proof negative pressure hood of this utility model.

[0027] Figure 2 This is a top-view three-dimensional structural diagram of Example 1 of the present invention, which is a non-powered three-proof negative pressure hood.

[0028] Figure 3 This is a bottom-view three-dimensional structural diagram of Example 1 of the present invention, which is a non-powered three-proof negative pressure hood.

[0029] Figure 4 Figure 1 Sectional view at point AA.

[0030] Figure 5 This is a structural diagram of a non-powered, three-proof negative pressure hood in its disassembled state.

[0031] Figure 6 yes Figure 4 A magnified view of a section at point B.

[0032] Figure 7 yes Figure 5 A magnified view of a section at point C.

[0033] Figure 8 yes Figure 4 A magnified view of a section at point D.

[0034] Figure 9 This is a schematic diagram of the structure of Embodiment 3 of the present invention, which is a non-powered three-proof negative pressure wind cap with an inverted conical air guide.

[0035] Figure 10 This is a schematic diagram of the structure of Embodiment 4 of the present invention, which is a non-powered three-proof negative pressure wind cap with an inverted conical air guide.

[0036] Figure 11 This is a schematic diagram of embodiment 5 of the present invention, which describes a non-powered, three-proof, negative pressure hood with an inverted conical air guide.

[0037] Figure 12 This is a schematic diagram of the internal threaded tube of the inverted conical air guide duct of the non-powered three-proof negative pressure wind cap of this utility model.

[0038] Figure 13 This is a front view of Example 2 of a non-powered three-proof negative pressure hood of this utility model.

[0039] Figure 14 yes Figure 1 Sectional view at EE.

[0040] Figure 15 yes Figure 14 A magnified view of a section at point F.

[0041] Figure 16 This is a schematic diagram of the upper fixing component structure of Example 2 of the non-powered three-proof negative pressure hood of this utility model.

[0042] As shown in the figure:

[0043] 1. Base, 2. Screw, 3. Middle bearing, 4. Middle fixing part, 5. Upper sleeve, 6. Inverted conical air guide, 7. Top support, 8. Through hole, 9. Top head, 10. Base with arc groove, 11. Top cap, 12. Lower connector, 13. Arc-shaped air guide blade, 14. Air duct, 15. Support plate, 16. Lower sleeve, 17. Limit nut, 18. Slot, 19. Thread, 20. Internal threaded tube, 21. Upper fixing part, 22. Connecting cap, 23. Rain cover, 24. Round hole. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0045] Combined with appendix Figure 1-16 A non-powered, three-proof negative pressure hood, comprising:

[0046] Base 1;

[0047] The lower support member is detachably installed on the inner wall of the base 1;

[0048] Screw 2, the lower end of which is disposed inside the lower support member;

[0049] The upper support member is rotatably mounted on the upper end of the screw 2;

[0050] An exhaust cap assembly is disposed on the top of the upper support member, which drives the upper support member to rotate, thereby forming negative pressure exhaust;

[0051] The upper support component includes a central bearing 3, a central fixing component 4, an upper sleeve 5, an inverted conical air guide 6, and a top support component 7. The central bearing 3 is located in the middle of the screw 2. The central fixing component 4 is sleeved on the outside of the central bearing 3. The inverted conical air guide 6 is sleeved on the outside of the screw 2, and the lower end of the inverted conical air guide 6 is sleeved on the central fixing component 4. The lower end of the central fixing component 4 is provided with a thread 19. The central fixing component 4 is connected to a nut through the thread 19. The nut abuts against the lower end of the inverted conical air guide 6 to fix the inverted conical air guide 6. The upper sleeve 5 is sleeved on the screw 2 and is located above the central fixing component 4. The upper sleeve 5 is provided with a through hole 8 that penetrates the upper sleeve 5 and the screw 2. The through hole 8 is provided with a pin that connects the upper sleeve 5 and the screw 2. The top support component 7 is provided with a top fixing component. The upper sleeve 5, the screw 2, and the top fixing component are connected and fitted together.

[0052] The exhaust cap assembly is installed on the upper part of the inverted conical air guide 6 and the top support 7.

[0053] The top fixing component is a combination of a top head 9, a base 10 with an arc groove, and a cap 22. The top head 9 is located inside the upper end of the upper sleeve 5, and the lower end of the top head 9 is located at the upper end of the screw 2. The top support component 7 is disposed above the top head 9. The top support component 7 has a base 10 with an arc groove inside it. The upper end of the top head 9 is located in the arc groove of the base 10 with an arc groove and rotates with the base 10 with an arc groove. The upper end of the top support component 7 has a circular hole 24 with a diameter of 70mm. An exhaust cap assembly extends from the upper part of the circular hole 24. The base 10 with an arc groove has an external thread. The upper end of the base 10 with an arc groove extends from the circular hole 24. The cap 22 is threadedly connected to the upper end of the base 10 with an arc groove. The portion of the base 10 with an arc groove located inside the top support 7 is provided with a nut. A straight screwdriver slot is provided on the top of the base 10 with an arc groove. By screwing the cap 22 upward, the base 10 with an arc groove can be turned with a screwdriver, thereby adjusting the base 10 with an arc groove up and down. The upper end of the base 10 with an arc groove and the outside of the cap 22 are covered with a rain cover 23.

[0054] The top fixing member is an upper fixing member 21. The upper end of the upper fixing member 21 is located inside the top support member 7. A bearing is provided inside the upper fixing member 21. The upper end of the screw 2 is located inside the upper fixing member 21 and placed inside the bearing. The lower end of the upper fixing member 21 is provided with an external thread. The upper fixing member 21 is connected to a nut through a thread 19. The nut and the lower part of the upper fixing member 21 abut against the upper end of the upper sleeve 5, limiting the upper sleeve 5.

[0055] The exhaust cap assembly includes a top cap 11, a lower connector 12, and arc-shaped air guide blades 13. The middle part of the top cap 11 is connected to the top support 7 by a pin. The upper end of the inverted conical air guide hopper 6 is connected to the top cap 11 by a pin. A plurality of arc-shaped air guide blades 13 are evenly provided at the lower end of the top cap 11. The plurality of arc-shaped air guide blades 13 are inclinedly arranged on the top cap 11, and an air duct 14 is formed between two pairs of arc-shaped air guide blades 13. The arc-shaped air guide blades 13 are located outside the inverted conical air guide hopper 6. The lower connector 12 and the lower end of the top cap 11 are connected by a pin.

[0056] Top cap 11 is a third-order top cap, such as Figure 2 As shown;

[0057] When the top fixing component is a combination of the top head 9, the base 10 with an arc groove, and the cap 22: the base 10 with an arc groove is provided with an oil injection hole that extends into the arc groove of the base 10 with an arc groove, so as to facilitate the injection of lubricating oil into the arc groove.

[0058] When the top fastener is the upper fastener 21: an oil injection hole is provided in the middle of the upper end of the top cap 11, which extends into the upper fastener 21, so as to facilitate the injection of lubricating oil into the upper fastener 21;

[0059] Multiple steps can be set on the upper part of the top cap 11 to enhance the deformation-adaptive function of the top cap 11.

[0060] The lower connector 12 is located above the base 1 and there is a gap between it and the base 1.

[0061] The lower support includes a support plate 15 and a fixing member. The fixing member is disposed outside the screw 2. Multiple slots 18 are evenly provided on the outer periphery of the fixing member. One end of the support plate 15 is disposed in the slot 18, and the other end of the support plate 15 is connected to the inner wall of the base 1 by a nail.

[0062] The fixing components are a lower sleeve 16 and a limiting nut 17. The lower sleeve 16 is fitted onto the lower end of the screw 2. The upper and lower ends of the upper and lower sleeves 16 of the screw 2 are provided with limiting nuts 17 to fix the lower sleeve 16. The slot 18 is provided on the outer periphery of the lower sleeve 16.

[0063] The fastener is an internally threaded tube 20, which is threadedly connected to the lower part of the screw 2, and the slot 18 is provided on the outer periphery of the internally threaded tube 20 of the lower sleeve.

[0064] In specific implementation, this utility model

[0065] Working principle

[0066] Non-powered drive: Indoor hot air flows upward from the base 1. When it passes through the air duct 14, it pushes the arc-shaped guide vane 13 to rotate, which drives the top cap 11, the lower connecting piece 12 and the inverted cone-shaped guide duct 6 to rotate synchronously, forming a negative pressure effect and accelerating the exhaust of indoor air.

[0067] When the external wind blows the arc-shaped air guide blades, it drives the top cap 11, the lower connecting piece 12, and the inverted cone-shaped air guide 6 to rotate synchronously, which can also create negative pressure inside the air cap, thereby drawing out the indoor air and accelerating indoor ventilation.

[0068] The function of the inverted cone-shaped air guide 6 is to diffuse the flue gas along the outer wall of the inverted cone to the surrounding areas, avoid stagnation at the top, and reduce wind resistance.

[0069] There are multiple designs for the inverted cone-shaped air guide 6;

[0070] Example 3, as Figure 9 As shown, the inverted conical air guide 6 is funnel-shaped, with a straight outline on one side of its outer perimeter;

[0071] Example 4, as Figure 10As shown, the inverted conical air guide 6 is a funnel shape with curved edges, and the outer circumference of one side is a concave arc.

[0072] Example 5, as Figure 11 As shown, the inverted conical air guide 6 is a nipple-shaped funnel with an outwardly convex arc on one side of its outer perimeter.

[0073] In the description of the embodiments of this utility model, it should be noted that if terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," or "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, terms such as "first," "second," and "third" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0074] Furthermore, the use of terms such as "horizontal," "vertical," and "sag" does not imply that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0075] In the description of the embodiments of this utility model, "a plurality of" means at least two.

[0076] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0077] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A passive, tri-proof, negative pressure hood, characterized in that, include: Base (1); The lower support member is detachably installed on the inner wall of the base (1); Screw (2), the lower end of which is disposed inside the lower support member; Upper support member, which is rotatably mounted on the upper end of the screw (2); An exhaust cap assembly is disposed on the top of the upper support member, which drives the upper support member to rotate, thereby forming negative pressure exhaust; The upper support includes a central bearing (3), a central fixing member (4), an upper sleeve (5), an inverted conical air guide (6), and a top support (7). The central bearing (3) is located in the middle of the screw (2). The central fixing member (4) is sleeved on the outside of the central bearing (3). The inverted conical air guide (6) is sleeved on the outside of the screw (2), and the lower end of the inverted conical air guide (6) is sleeved on the central fixing member (4). The lower end of the central fixing member (4) is provided with a thread (19). The central fixing member (4) is connected to the screw through the thread (19). A nut is connected to the upper sleeve (5), which abuts against the lower end of the inverted conical air guide (6) to fix the inverted conical air guide (6). The upper sleeve (5) is fitted on the screw (2) and is located above the middle fixing member (4). The upper sleeve (5) is provided with a through hole (8) that passes through the upper sleeve (5) and the screw (2). A pin is provided in the through hole (8) to connect the upper sleeve (5) and the screw (2). A top fixing member is provided in the top support member (7). The upper sleeve (5), the screw (2) and the top fixing member are connected and cooperated. The exhaust cap assembly is installed on the upper end of the inverted conical air guide hopper (6) and the top support (7).

2. The non-powered three-proof negative pressure hood according to claim 1, characterized in that: The top fixing component is a combination of a top head (9), a base with an arc groove (10), and a cap (22). The top head (9) is located inside the upper end of the upper sleeve (5), and the lower end of the top head (9) is located at the upper end of the screw (2). The top support component (7) is located above the top head (9). The top support component (7) is provided with a base with an arc groove (10). The upper end of the top head (9) is located in the arc groove of the base with an arc groove (10) and rotates with the base with an arc groove (10). The upper end of the component (7) is provided with a round hole (24), and an exhaust cap assembly extends from the upper part of the round hole (24). The base (10) with a circular groove is provided with an external thread. The upper end of the base (10) with a circular groove extends from the round hole (24). The cap (22) and the upper end of the base (10) with a circular groove are threaded together. The part of the base (10) with a circular groove located inside the top support (7) is provided with a nut. The upper end of the base (10) with a circular groove and the outside of the cap (22) are covered with a rain cover (23).

3. The non-powered three-proof negative pressure hood according to claim 1, characterized in that: The top fixing member is an upper fixing member (21). The upper end of the upper fixing member (21) is located inside the top support member (7). The upper fixing member (21) is provided with a bearing. The upper end of the screw (2) is located inside the upper fixing member (21) and placed inside the bearing. The lower end of the upper fixing member (21) is provided with an external thread. The upper fixing member (21) is connected to a nut through a thread (19). The nut and the lower part of the upper fixing member (21) abut against the upper end of the upper sleeve (5) to limit the upper sleeve (5).

4. The non-powered three-proof negative pressure hood according to claim 1, characterized in that: The exhaust cap assembly includes a top cap (11), a lower connector (12), and arc-shaped air guide blades (13). The top cap (11) is connected to the top support (7) in the middle by a pin. The upper end of the inverted conical air guide hopper (6) is connected to the top cap (11) by a pin. Multiple arc-shaped air guide blades (13) are evenly arranged at the lower end of the top cap (11). The multiple arc-shaped air guide blades (13) are inclined on the top cap (11), and an air duct (14) is formed between each pair of arc-shaped air guide blades (13). The arc-shaped air guide blades (13) are located outside the inverted conical air guide hopper (6). The lower connector (12) and the lower end of the top cap (11) are connected by a pin.

5. A non-powered, three-proof negative pressure hood according to claim 4, characterized in that: The lower connector (12) is located above the base (1) and there is a gap between it and the base (1).

6. The non-powered three-proof negative pressure hood according to claim 1, characterized in that: The lower support includes a support plate (15) and a fixing member. The fixing member is located outside the screw (2). Multiple slots (18) are evenly provided on the outer periphery of the fixing member. One end of the support plate (15) is located in the slot (18). The other end of the support plate (15) is connected to the inner wall of the base (1) by a nail.

7. A non-powered, three-proof negative pressure hood according to claim 6, characterized in that: The fixing components are a lower sleeve (16) and a limiting nut (17). The lower sleeve (16) is fitted onto the lower end of the screw (2). The upper and lower ends of the upper and lower sleeves (16) of the screw (2) are provided with limiting nuts (17) to fix the lower sleeve (16). The slot (18) is provided on the outer periphery of the lower sleeve (16).

8. A non-powered, three-proof negative pressure hood according to claim 6, characterized in that: The fastener is an internally threaded tube (20), which is threaded to the lower part of the screw (2), and the slot (18) is provided on the outer periphery of the internally threaded tube (20) of the lower sleeve.

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