Butterfly valve fixing assembly for granary air tightness detection, valve and detection system

Abstract

A butterfly valve fixing assembly for granary airtightness detection, a valve and a detection system are characterized in that a ventilation opening penetrating through a side wall is formed in the side wall of a granary, one end of the ventilation opening extends out of the granary, and the fixing assembly comprises a connecting plate which is arranged outside the granary and can block the ventilation opening and a plurality of blocking pieces arranged in the granary; the connecting plate is fixedly arranged on the side, facing the granary, of the butterfly valve, a connecting hole used for being in butt joint with the butterfly valve is formed in the center of the connecting plate, a plurality of pull rods are vertically and fixedly connected to the connecting plate, and the free ends of the pull rods sequentially penetrate through the ventilation openings and the blocking pieces and then are connected with the blocking pieces through locking nuts. The blocking pieces are pressed to the inner side wall of the granary, and the connecting plates are pressed to the ends of the ventilation openings. The butterfly valve fixing device can fix the butterfly valve on the flange-free ventilation opening, is simple to operate and can be repeatedly used.

Description

Technical Field

[0001] The utility model relates to the field of granary air tightness detection, in particular to a butterfly valve fixing component, a valve and a detection system for granary air tightness detection. Background Art

[0002] After grain silos are built, they must undergo an airtightness test to evaluate the quality of the silo's construction and its grain storage performance. This is a key indicator for new silo acceptance and is crucial to the effectiveness and cost of applications like controlled atmosphere storage and chemical fumigation. Currently, most silo airtightness tests are conducted using the positive pressure method. Specifically, a butterfly valve is opened, and a fan is used to apply pressure into the silo through the vent until the pressure reaches a predetermined value, at which point the butterfly valve and fan are closed. The positive pressure method is used to test the pressure inside the silo, recording the time it takes for the pressure to decay to half the test pressure. This is the pressure half-life value, which is used to evaluate the silo's airtightness.

[0003] In the above method, the butterfly valve connecting plate is fixed to the flange of the vent using a buckle or other method. The fan outlet is connected to the butterfly valve connecting plate fixed to the silo vent through a canvas bag, completing the installation of the warehouse airtightness detection device. However, for vents without a flange, it is impossible to use buckles or other methods to fix the butterfly valve connecting plate to the vent. Utility Model Content

[0004] The purpose of the utility model is to provide a butterfly valve fixing assembly for a vent without a flange when testing the air tightness of a granary. The assembly can fix a butterfly valve connecting plate on the vent without a flange, is easy to operate, and can be reused.

[0005] In order to achieve the above-mentioned purpose, the specific scheme adopted by the utility model is: a butterfly valve fixing assembly for air tightness detection of a granary, wherein a vent penetrating the side wall of the granary is provided, and one end of the vent extends to the outside of the granary, and the fixing assembly includes a connecting plate arranged outside the granary and capable of blocking the vent and a plurality of baffles arranged inside the granary, the connecting plate is fixedly arranged on the side of the butterfly valve facing the granary, and a connecting hole for docking the butterfly valve is opened at the center position of the connecting plate, and a plurality of pull rods are vertically fixedly connected to the connecting plate, and the free ends of the pull rods pass through the vent and the baffle in turn and are connected to the baffle through a locking nut, so that the baffle is pressed against the inner wall of the granary and the connecting plate is pressed against the end of the vent.

[0006] As an optimization solution for the above-mentioned butterfly valve fixing assembly for granary air tightness detection: a plurality of mounting holes corresponding to the pull rods are opened on the connecting plate, and the pull rods pass through the mounting holes and are connected to the connecting plate through fixing nuts located on both sides of the connecting plate.

[0007] A valve for detecting air tightness of a granary comprises a butterfly valve and a fixing assembly for mounting the butterfly valve on a vent, wherein the fixing assembly is the above-mentioned fixing assembly.

[0008] As an optimization solution for the above-mentioned valve for granary air tightness detection: a box body is fixed to the outer wall of the granary, and a gap is provided between the inner wall of the box body and the outer wall of the ventilation opening.

[0009] As another optimization solution for the above-mentioned valve for granary air tightness detection: the end of the vent extending outside the granary is located inside the box.

[0010] As another optimization solution for the above-mentioned valve for granary air tightness detection: a connecting pipe I is provided on the side of the butterfly valve facing the granary, one end of the connecting pipe I is connected to the flange of the butterfly valve facing the granary, and the outer wall of the other end of the connecting pipe I is sealed with the inner wall of the connecting hole.

[0011] A detection system for detecting the air tightness of a granary includes a pressure gauge for detecting the pressure in the granary and a fan for applying pressure to the granary, and is characterized in that the valve mentioned above is provided between the air outlet of the fan and the vent.

[0012] As an optimization solution for the above-mentioned detection system for granary air tightness detection: a connecting pipe II is provided on the side of the butterfly valve facing away from the granary, the connecting pipe II is connected to the flange on the butterfly valve on that side, and the other end of the connecting pipe II is connected to the air outlet of the fan.

[0013] As another optimization solution of the above-mentioned detection system for granary air tightness detection: the air outlet of the fan is connected to the end of the connecting pipe II through a canvas bag.

[0014] As another optimization solution of the above-mentioned detection system for granary air tightness detection: an anti-slip ring is provided around the outer side wall of the connecting pipe II.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The utility model provides a butterfly valve fixing assembly for detecting the air tightness of a granary. After the pull rod passes through the baffle, the locking nut is tightened to move the baffle toward the connecting plate until it is pressed against the inner wall of the granary. At this time, the connecting plate is pressed against the end face of the vent, thereby fixing the butterfly valve connecting plate. The utility model has the advantages of simple operation, low cost and repeatability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the butterfly valve fixing assembly of the utility model;

[0018] Figure 2 This is a schematic diagram of the baffle in the granary;

[0019] Figure 3 It is a structural diagram of the butterfly valve connecting plate;

[0020] Figure 4 yes Figure 3 Right view of;

[0021] Figure 5 It is a schematic diagram of the warehouse air tightness detection system;

[0022] Figure numerals: 1. baffle, 2. pull rod, 201. locking nut, 202. fixing nut, 203. gasket, 3. butterfly valve, 301. connecting pipe I, 302. connecting pipe II, 303. anti-slip ring, 4. connecting plate, 5. granary, 501. vent, 6. box, 7. pressure gauge, 8. fan, 801. canvas bag. DETAILED DESCRIPTION

[0023] The technical solution of the present invention is further elaborated in detail below in conjunction with specific embodiments. The parts that are not described and disclosed in detail in the following embodiments of the present invention should be understood as existing technologies known or should be known to those skilled in the art, such as how the pressure gauge 7 draws out the gas pressure from the warehouse, the structure of the butterfly valve 3, how the canvas bag 801 is connected to the connecting pipe II 302, etc.

[0024] Example 1

[0025] A butterfly valve fixing assembly for a granary air tightness detection system, wherein the granary 5 is provided with a vent 501 penetrating the side wall, the vent 501 being a circular cylindrical structure with openings at both ends and arranged at the lower part of the granary 5, specifically, the diameter of the vent 501 is 40-60 cm. In this embodiment, the diameter of the vent 501 is 50 cm, the outer wall of the vent 501 is sealedly connected to the inner wall of the vent 501 box, and one end of the vent 501 is flush with the inner wall of the granary 5, and the other end of the vent 501 extends to the outside of the granary 5.

[0026] The fixing assembly includes a connecting plate 4 disposed outside the granary 5 and capable of sealing the vent 501, and several baffles 1 disposed within the granary 5. The connecting plate 4 has the same shape as the vent 501 and can be a square or circular plate structure. In this embodiment, the connecting plate 4 is a circular plate structure, and its size is 3 cm larger than the diameter of the vent 501, ensuring that the end of the vent 501 can completely adhere to the surface of the connecting plate 4, achieving a sealed connection between the end of the vent 501 and the connecting plate 4. The butterfly valve 3 is a commercially available product, and its specific structure is not repeated here.

[0027] Connecting plate 4 has a connection hole in its center. Connecting plate 4 is welded to one end of connecting pipe I 301, a flange is welded to the other end of connecting pipe I 301, and a flange is welded to one end of connecting pipe II 302. Bolts are used to tightly clamp butterfly valve 3 together through the two flanges to form the butterfly valve connecting plate. The diameters of the center hole of connecting plate 4, connecting pipe I 301, and connecting pipe II 302 are the same as the diameter of the butterfly valve.

[0028] The baffle 1 is a long strip-shaped plate structure. The length of the baffle 1 is 5 cm larger than the diameter of the vent 501. The number of baffles 1 is 1-4. In this embodiment, there are two baffles 1 and they are located on the upper and lower sides of the axis of the vent 501.

[0029] Multiple tie rods 2 are vertically fixedly connected to the connecting plate 4. External threads are provided on the outer walls of the tie rods 2 near their ends. There are 2-8 tie rods 2, and in this embodiment, there are 4 tie rods 2. The connecting plate 4 and the tie rods 2 can be connected by bolts. In this embodiment, the connecting plate 4 is provided with four mounting holes corresponding to each tie rod 2, two of which are located above the connecting hole, and the remaining two are located below the connecting hole. The diameter of the mounting holes is equal to the diameter of the threads on the tie rods 2. The tie rods 2 pass through the mounting holes and are connected to the connecting plate 4 via fixing nuts 202 located on both sides of the connecting plate 4. A gasket 203 is provided between the fixing nuts 202 and the connecting plate 4. In this embodiment, the height distance between the mounting holes and the center of the connecting plate is seven-eighths the diameter of the vent 501. Each baffle 1 is provided with a through hole corresponding to the pull rod 2, the diameter of the through hole being greater than or equal to the diameter of the pull rod 2. The free end of the pull rod 2 passes through the vent 501 and the baffle 1 in sequence and is connected to the baffle 1 via a locking nut 201, so that the baffle 1 is pressed against the inner wall of the granary 5 and the connecting plate 4 is pressed against the end of the vent 501. When the butterfly valve fixing assembly is installed on the vent 501, the baffle 1 and the connecting plate 4 are located at both ends of the vent 501, that is, the baffle 1 is located inside the wall of the granary 5 and the connecting plate 4 is located outside the end of the vent 501. The locking nut 201 is rotated to push the baffle 1 toward the connecting plate 4 until the baffle 1 is pressed against the inner wall of the granary 5. At this point, the connecting plate 4 is pressed against the end of the vent 501, thereby fixing the butterfly valve. The operation is simple and the assembly can be reused.

[0030] Example 2

[0031] A valve for testing the air tightness of a granary includes a butterfly valve 3 and a fixing assembly for mounting the butterfly valve 3 on a vent 501. The fixing assembly is the same as that described in Example 1. In this embodiment, a box 6 is fixed to the outer wall of the granary 5, with a gap between the inner wall of the box 6 and the outer wall of the vent 501. The end of the vent 501 extending outside the granary 5 is located within the box 6.

[0032] Example 3

[0033] A granary air tightness detection system, such as Figure 5 As shown, the system includes a pressure gauge 7 for detecting pressure within the granary and a fan 8 for applying pressure to the granary. A fixed assembly is provided between the air outlet of fan 8 and the vent 501. This assembly is a fixed assembly for a granary air tightness detection system described in Example 1. The air outlet of fan 8 interfaces with the port of the butterfly valve connection plate. Specifically, the diameter of connecting pipe II 302 is equal to the diameter of connecting pipe I 301, and the other end of connecting pipe II 302 is connected to the air outlet of fan 8. Specifically, the air outlet of fan 8 and the end of connecting pipe II 302 are connected via a canvas bag 801. One end of canvas bag 801 is sealed to the air outlet, and the other end of canvas bag 801 is sleeved and sealed to the outer wall of connecting pipe II 302. To prevent canvas bag 801 from sliding off connecting pipe II 302 during operation of fan 8, an anti-slip ring 303 is provided around the outer wall of connecting pipe II 302 to maintain the normal operation of the detection system.

[0034] When testing the air tightness of the granary 5, the fixing assembly is installed on the vent 501, and then the air outlet of the fan 8 is connected to the connecting pipe II 302 of the butterfly valve 4 through the canvas bag 801. The butterfly valve 3 and the fan 8 are opened to allow the fan 8 to pressurize the granary, and the pressure in the granary is tested using a pressure gauge 7. When the pressure in the granary reaches a predetermined value, the butterfly valve 3 and the fan 8 are closed, and the pressure in the granary is tested using a pressure gauge. The time required for the pressure in the granary to decay to half of the original pressure is recorded. This time is the pressure half-life value of the granary, and the air tightness of the granary is evaluated based on this value.

[0035] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A butterfly valve fixing assembly for granary air tightness detection, wherein a vent (501) penetrating the granary (5) is provided on a side wall of the granary, and one end of the vent (501) extends to the outside of the granary (5), characterized in that: The fixing assembly comprises a connecting plate (4) arranged outside the granary (5) and capable of blocking the ventilation opening (501) and a plurality of baffles (1) arranged inside the granary (5); the connecting plate (4) is fixedly arranged on the side of the butterfly valve (3) facing the granary (5), and a connecting hole for docking the butterfly valve (3) is provided at the center of the connecting plate (4); a plurality of pull rods (2) are vertically fixedly connected to the connecting plate (4); the free ends of the pull rods (2) pass through the ventilation opening (501) and the baffle (1) in turn and are connected to the baffle (1) through a locking nut (201), so that the baffle (1) is pressed against the inner wall of the granary (5) and the connecting plate (4) is pressed against the end of the ventilation opening (501).

2. The butterfly valve fixing assembly for granary air tightness detection according to claim 1, characterized in that: The connecting plate (4) is provided with a plurality of mounting holes corresponding one to one with the pull rods (2); the pull rods (2) pass through the mounting holes and are connected to the connecting plate (4) via fixing nuts (202) located on both sides of the connecting plate (4).

3. A valve for granary air tightness detection, comprising a butterfly valve (3) and a butterfly valve fixing assembly for mounting the butterfly valve (3) on a vent (501), characterized in that: The fixing assembly is the butterfly valve fixing assembly described in any one of claims 1-2.

4. The valve for granary air tightness detection according to claim 3, characterized in that: A box body (6) is fixed to the outer wall of the granary (5), and a gap is provided between the inner wall of the box body (6) and the outer wall of the ventilation opening (501).

5. The valve for granary air tightness detection according to claim 4, characterized in that: The end of the vent (501) extending outside the granary (5) is located inside the box body (6).

6. The valve for granary air tightness detection according to claim 3, characterized in that: A connecting pipe I (301) is provided on the side of the butterfly valve (3) facing the granary (5), one end of the connecting pipe I (301) is connected to the flange (304) of the butterfly valve (3) facing the granary (5), and the outer wall of the other end of the connecting pipe I (301) is sealedly connected to the inner wall of the connecting hole.

7. A detection system for detecting air tightness of a granary, comprising a pressure gauge (7) for detecting the pressure inside the granary (5) and a blower (8) for applying pressure to the granary (5), characterized in that: A valve according to any one of claims 1 to 5 is provided between the air outlet of the fan (8) and the vent (501).

8. The detection system for granary air tightness detection according to claim 7, characterized in that: A connecting pipe II (302) is provided on the side of the butterfly valve (3) facing away from the granary (5), and the connecting pipe II (302) is connected to the flange (304) on the side of the butterfly valve (3), and the other end of the connecting pipe II (302) is connected to the air outlet of the fan (8).

9. The detection system for granary air tightness detection according to claim 8, characterized in that: The air outlet of the fan (8) is connected to the end of the connecting pipe II (302) through a canvas bag (801).

10. The detection system for granary air tightness detection according to claim 8, characterized in that: An anti-slip ring (303) is provided around the outer side wall of the connecting pipe II (302).

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