A positive pressure exhaust device specially used for the top of a mushroom house of grass rot fungus

Abstract

The utility model relates to a positive pressure exhaust device special for grass rot fungus mushroom house top, is provided at the top of mushroom house, include: valve body, the inside of valve body is equipped with several sets of adjusting fan blade, and each adjusting fan blade is rotatablely installed on the valve body through rotating shaft respectively, under normal pressure state, the adjusting fan blade is relatively close under the action of dead weight, closes the through passage of valve body, under the positive pressure state, the adjusting fan blade is relatively opened upward, opens the through passage of valve body. The scheme has larger exhaust passage, can be used for the grass rot fungus mushroom house fast exhaust of large output.

Description

Technical Field

[0001] This utility model relates to the technical field of mushroom house ventilation equipment, and in particular to a positive pressure exhaust device for the top of a mushroom house for straw-rotting fungi. Background Technology

[0002] In the cultivation of edible fungi, the environmental conditions inside the mushroom house are crucial for their growth. Proper ventilation ensures fresh air and stable temperature and humidity within the mushroom house, thus providing a favorable environment for fungi growth. Positive pressure exhaust valves are an important component of the mushroom house ventilation system; their function is to expel excess air when the pressure inside the mushroom house reaches a certain value, maintaining a positive pressure environment.

[0003] Currently, in mushroom cultivation factories with a substrate area of ​​less than 500 square meters, exhaust ventilation often uses aluminum alloy self-hanging louvers composed of multiple small blades. Blade falls off frequently, and the high shading rate prevents rapid gas exhaust. For factories requiring large-scale production, the substrate area can reach 1000 square meters. According to the original design, more exhaust fans are needed, increasing blade wear, making opening and repairing the mushroom houses more troublesome, and the factory's appearance is less aesthetically pleasing. Utility Model Content

[0004] To address the aforementioned problems, the purpose of this utility model is to provide a positive pressure exhaust device specifically designed for the top of a straw-rotting mushroom house. This device is installed on the top of the mushroom house, has a large exhaust channel, and can be used for rapid exhaust in high-volume straw-rotting mushroom houses.

[0005] A positive pressure exhaust system specifically designed for the top of a straw-rotting mushroom house, installed on the top of the mushroom house, includes: Valve body, the valve body being open from top to bottom; The valve body is provided with several sets of regulating fan blades, each of which is rotatably mounted on the valve body via a rotating shaft. Under normal pressure, the regulating fan blades move closer together under their own weight, closing the through passage of the valve body. Under positive pressure, the regulating fan blades open upwards relative to each other, opening the through passage of the valve body. The valve body is provided with several support members. The support members are positioned higher relative to the rotating shaft. Under normal pressure, the top of the adjusting fan blade naturally rests on the support member, and the adjusting fan blade is inclined from top to bottom.

[0006] Preferably, the surface of the regulating fan blade is provided with an anti-corrosion coating, and / or the regulating fan blade as a whole is made of an anti-corrosion material.

[0007] Preferably, the regulating fan blades are made of magnesium-aluminum plate.

[0008] Preferably, the adjusting fan blade is provided with a sealing element on its periphery for closing the gap between it and the valve body.

[0009] Preferably, a limiting member is provided inside the valve body, and the limiting member is located on the opening path of the corresponding adjusting fan blade, which is used to limit the maximum opening angle of the adjusting fan blade.

[0010] Preferably, the adjusting fan blade is provided with a counterweight adjusting assembly, which includes a counterweight rod installed on the adjusting fan blade and a counterweight block detachably mounted on the counterweight rod; the position of the counterweight block on the counterweight rod is fixed and adjustable to adjust the relative height of the counterweight block.

[0011] Preferably, the counterweight rod is a threaded rod, and the counterweight block is provided with an internal thread that matches the threaded rod. The counterweight block and the counterweight rod are connected by a threaded engagement.

[0012] Preferably, the rotating shaft is located below the center of the adjusting blade.

[0013] This invention, employing the above-mentioned solution, is installed on the top of the mushroom house. The support components on the valve body allow the fan blades to naturally overlap and tilt under normal pressure. This design effectively solves the problems of blade detachment and high shading rate in the prior art: the fan blades are mounted via a rotating shaft and supported by the support components, resulting in a more stable structure and reducing the risk of blade detachment; the tilted setting and upward opening method reduce the shading rate of the fan blades, allowing air to be quickly discharged under positive pressure, thus improving ventilation efficiency. Simultaneously, this device simplifies installation on the mushroom house roof, reduces the need for openings and repairs, and improves the appearance of the facility. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure under normal pressure. Figure 2 A schematic diagram of the structure for adjusting the fan blades; Figure 3 This is a schematic diagram of the structure under positive pressure.

[0015] Figure label: Valve body 1, regulating fan blade 2, rotating shaft 3, support 4, sealing element 5, counterweight rod 61, counterweight 62. Detailed Implementation

[0016] The embodiments of this utility model are described in detail below.

[0017] This embodiment discloses a positive pressure exhaust device specifically designed for the top of a mushroom house for straw-rotting fungi. Installed on the top of the mushroom house, as shown in Figures 1-3, it includes a valve body 1, which extends vertically to form a through-channel connecting the indoor and outdoor environments. An adjusting fan blade 2 controls the flow of this channel. Under positive pressure, the adjusting fan blade 2 opens upwards due to the pressure difference, opening the channel for exhaust. Under normal pressure, the adjusting fan blade 2 closes under its own weight, closing the channel and sealing the room. This structure eliminates the need for an additional power mechanism to control the opening and closing of the adjusting fan blade 2, resulting in a simple design.

[0018] As shown in Figure 1, the valve body 1 in this embodiment includes a rectangular / square cross-section formed by a front side plate, a rear side plate, a left side plate, and a right side plate; in other embodiments, the valve body 1 may also have a circular or other shaped cross-section. The valve body 1 contains several sets of regulating fan blades 2. In a preferred embodiment, each set includes a pair of opposing regulating fan blades 2. Each regulating fan blade 2 is rotatably mounted on the valve body 1 via a rotating shaft 3. The rotating shaft 3 is mounted on the valve body 1, and the regulating fan blade 2 can rotate around the corresponding rotating shaft 3 as the rotation center to achieve on / off switching. Preferably, the rotating shaft 3 is located slightly below the center of the regulating fan blade 2, allowing the regulating fan blade 2 to naturally droop under its own weight and close the exhaust. In an optional embodiment, the rotating shaft 3 is fixed to the regulating fan blade 2 by several saddle clips, and the front and rear ends of the rotating shaft 3 are respectively mounted on the valve body 1 through pre-drilled shaft holes. To facilitate the rotation of the adjusting fan blade 2, a gap is left between the adjusting fan blade 2 and the valve body 1. Furthermore, to achieve a seal when the adjusting fan blade 2 is closed, a sealing element 5 is provided around the adjusting fan blade 2 to close the gap with the valve body 1. In an optional embodiment, the sealing element 5 is an L-shaped sealing element, so that it can achieve a good sealing effect without hindering the rotation of the adjusting fan blade 2.

[0019] The valve body 1 is provided with several support members 4, which are positioned higher than the rotating shaft 3. Under normal pressure, the top of the regulating fan 2 naturally overlaps the support members 4, as shown in Figures 1 and 2. The regulating fan 2 is inclined from top to bottom. The support members 4 on the valve body 1 allow the regulating fan 2 to naturally overlap and be in an inclined state under normal pressure, making it easier to open the regulating fan 2 upward for exhaust under positive pressure, thus improving ventilation efficiency.

[0020] Furthermore, a limiting member is provided inside the valve body 1, located on the opening path of the corresponding adjusting fan blade 2, to limit the maximum opening angle of the adjusting fan blade 2. By limiting the maximum opening angle of the adjusting fan blade 2, it is possible to prevent the blade from flipping outward and failing to close due to its own weight. In a specific embodiment, limiting screws are provided on the front and rear side plates of the valve body 1 to limit the opening angle of the adjusting fan blade 2 to within 85°.

[0021] In a preferred embodiment, the regulating fan blade 2 is provided with a counterweight adjustment assembly, which includes a counterweight rod 61 mounted on the regulating fan blade 2 and a counterweight component 62 detachably mounted on the counterweight rod 61. The position of the counterweight component 62 on the counterweight rod 61 is fixed and adjustable to adjust the relative height of the counterweight component 62. By replacing the counterweight component 62 with different weights and adjusting the position of the counterweight component 62 on the counterweight rod 61, the opening angle of the regulating fan blade 2 can be adjusted by adjusting the weight of the upper and lower halves of the fan blade 2, thereby adjusting the pressure inside the mushroom house. In a specific embodiment, the counterweight rod 61 is a threaded rod, and the counterweight component 62 has an internal thread that matches the threaded rod. The counterweight component 62 and the counterweight rod 61 are connected by a threaded engagement, thereby allowing for convenient adjustment of the fixed position of the counterweight component 62 on the counterweight rod 61.

[0022] Furthermore, due to the high humidity inside the mushroom house, an anti-corrosion coating is applied to the surface of the regulating fan blade 2, and / or the regulating fan blade 2 as a whole is made of anti-corrosion material. In a preferred embodiment, the regulating fan blade 2 is made of magnesium-aluminum plate. Magnesium-aluminum plate has lightweight and corrosion-resistant properties, which not only reduces the weight of the regulating fan blade 2, making it easier to open under positive pressure, but also has good corrosion resistance.

[0023] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A positive pressure exhaust system specifically designed for the top of a straw-rotting mushroom house, characterized in that, Located on the top of the mushroom house, including: Valve body, the valve body being open from top to bottom; The valve body is provided with several sets of regulating fan blades, each of which is rotatably mounted on the valve body via a rotating shaft. Under normal pressure, the regulating fan blades move closer together under their own weight, closing the through passage of the valve body. Under positive pressure, the regulating fan blades open upwards relative to each other, opening the through passage of the valve body. The valve body is provided with several support members. The support members are positioned higher relative to the rotating shaft. Under normal pressure, the top of the adjusting fan blade naturally rests on the support member, and the adjusting fan blade is inclined from top to bottom.

2. The positive pressure exhaust device for the top of a straw-rotting mushroom house according to claim 1, characterized in that, The surface of the regulating fan blade is provided with an anti-corrosion coating, and / or the regulating fan blade as a whole is made of anti-corrosion material.

3. A positive pressure exhaust system for the top of a straw-rotting mushroom house according to claim 2, characterized in that, The regulating fan blades are made of magnesium-aluminum plate.

4. A positive pressure exhaust system for the top of a straw-rotting mushroom house according to claim 1, characterized in that, The regulating fan blade is provided with a seal around its periphery to close the gap between it and the valve body.

5. A positive pressure exhaust system for the top of a straw-rotting mushroom house according to claim 1, characterized in that, The valve body is provided with a limiting member on its inner side. The limiting member is located on the opening path of the corresponding adjusting fan blade and is used to limit the maximum opening angle of the adjusting fan blade.

6. A positive pressure exhaust system for the top of a straw-rotting mushroom house according to claim 1, characterized in that, The adjustable fan blade is equipped with a counterweight adjustment assembly, which includes a counterweight rod installed on the adjustable fan blade and a counterweight block detachably mounted on the counterweight rod; the position of the counterweight block on the counterweight rod is fixed and adjustable to adjust the relative height of the counterweight block.

7. A positive pressure exhaust device for the top of a straw-rotting mushroom house according to claim 6, characterized in that, The counterweight rod is a threaded rod, and the counterweight block has an internal thread that matches the threaded rod. The counterweight block and the counterweight rod are connected by a threaded fit.

8. A positive pressure exhaust system for the top of a straw-rotting mushroom house according to claim 1, characterized in that, The rotating shaft is located below the center of the adjusting blade.

Images